Skocz do pozycji: 1.

Tytuł:

Review of X-ray detection systems

Autorzy:

Urbański, Paweł
Grzebyk, Tomasz

Powiązania:

https://bibliotekanauki.pl/articles/27315700.pdf

Data publikacji:

2023

Wydawca:

Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich

Tematy:

X-ray detection
X-ray radiation
dosimetry
luminescence

Opis:

The article presents an overview and a classification of X-ray detection methods. The main motivation for its preparation was the need to select a suitable and useful method for detecting signals from a currently developed miniature micro-electro-mechanical system (MEMS) X-ray source. The described methods were divided into passive and active ones, among which can be distinguished: chemical, luminescent, thermo-luminescent, gas ionization, semiconductor, and calorimetric methods. The advantages and drawbacks of each method were underlined, as well as their usefulness for the characterisation of the miniature MEMS X-ray source.

Źródło:

Opto-Electronics Review; 2023, 31, 3; art. no. e146554
1230-3402

Pojawia się w:

Opto-Electronics Review

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 2.

Tytuł:

Wideband spectral emission measurements from laser-produced plasma EUV/SXR source based on a double gas puff target

Autorzy:

Arikkatt, Antony Jose
Wachulak, Przemysław
Fiedorowicz, Henryk
Bartnik, Andrzej
Czwartos, Joanna

Powiązania:

https://bibliotekanauki.pl/articles/1849155.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

Plasma Spectroscopy
X-ray coherence tomography
soft X-ray

Opis:

We present spectral emission characteristics from laser-plasma EUV/SXR sources produced by irradiation of < 1 J energy laser pulse on eleven different double stream gas puff targets, with most intense electronic transitions identified in the spectral range from 1 nm to 70 nm wavelength which corresponds to photon energy from 18 eV to 1240 eV. The spectra were obtained using grazing incidence and transmission spectrographs from laser-produced plasma emission, formed by the interaction of a laser beam with a double stream gas puff target. Laser pulses with a duration of 4 ns and energy of 650 mJ were used for the experiment. We present the results obtained from three different spectrometers in the wavelength ranges of SXR (1-5.5 nm), SXR/EUV (4-15.5 nm), and EUV (10-70 nm). In this paper, detailed information about the source, gas targets under investigation, the experimental setup, spectral measurements and the results are presented and discussed. Such data may be useful for the identification of adequate spectral emissions from gasses in the EUV and SXR wavelength ranges dedicated to various experiments (i.e. broadband emission for the X-ray coherence tomography XCT) or may be used for verification of magnetohydrodynamic plasma codes.

Źródło:

Metrology and Measurement Systems; 2020, 27, 4; 701-719
0860-8229

Pojawia się w:

Metrology and Measurement Systems

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 3.

Tytuł:

$K_{β}/K_{α}$ X-Ray Intensity Ratios for Cr, Mn, Fe, and Co Excited by 8.735 keV Energy

Autorzy:

Yılmaz, R.

Powiązania:

https://bibliotekanauki.pl/articles/1398200.pdf

Data publikacji:

2018-05

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

K X-ray intensity ratios
X-ray fluorescence
cross-sections

Opis:

In this study, the K shell intensity ratios $K_{β}/K_{α}$ have been experimentally determined for the elements Cr, Mn, Fe, and Co. Measurements have been carried out at 8.735 keV excitation energy by using secondary excitation method. K X-rays emitted by samples have been counted by a Si (Li) detector with 160 eV resolutions at 5.9 keV. The measured values were compared with the calculated theoretical values. The obtained values are in good agreement with the calculated values.

Źródło:

Acta Physica Polonica A; 2018, 133, 5; 1227-1230
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 4.

Tytuł:

Pomiar czasu ekspozycji w miernikach promieniowania rentgenowskiego
Measurement of exposure duration in the X-ray analyser

Autorzy:

Urban, Arkadiusz
Czubla, Albin
Knyziak, Adrian

Powiązania:

https://bibliotekanauki.pl/articles/88863.pdf

Data publikacji:

2020

Wydawca:

Główny Urząd Miar

Tematy:

pomiar czasu ekspozycji
promieniowanie X
aparat rentgenowski
exposure time measurement
X-ray
X-ray machine
X-ray multimeter

Opis:

W artykule opisano problematykę pomiarów przedziałów czasu równych czasowi ekspozycji promieniowania X. Pokazano zależność niepewności pomiaru od metody pomiarowej oraz od sposobu działania źródła promieniowania rentgenowskiego. Przedstawiono wpływ zakresu przedziału czasu mierzonego przez miernik na błąd pomiaru.
The main idea of the article is a description of problems of X-ray exposure time measurement. The content describes two types of X-ray machines. Among the two X-ray machine types, continuous type with shutter is more suitable for long time measurement, and pulse type is better for short time measurements. The differences between mode of operation of different X-ray sources and it’s impact on uncertainty of measurement of exposure time are presented. It also discusses the impact of different resolution settings of device under calibration on uncertainty measurement.

Źródło:

Metrologia i Probiernictwo : biuletyn Głównego Urzędu Miar; 2020, 1 (24); 15-20
2300-8806

Pojawia się w:

Metrologia i Probiernictwo : biuletyn Głównego Urzędu Miar

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 5.

Tytuł:

X pinch as a source for X-ray radiography

Autorzy:

Pikuz, S.
Shelkovenko, T.
Romanova, V.
Sinars, D.
Hammer, D.
Bland, S.
Lebedev, S.

Powiązania:

https://bibliotekanauki.pl/articles/147532.pdf

Data publikacji:

2001

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

wire array
X-pinch
X-ray imaging
X-ray radiography
Z-pinch

Opis:

This article describes several applications and methods using the X pinch as a source of X-ray radiation for the radiography of dense plasma objects. These methods, in general, do not use pinholes, and instead take the advantage of the small size (<1 mm, and in some cases <3 mm) and a short X-ray emission duration (<1 ns) of the radiation source produced by an X pinch. Two of these methods, monochromatic and direct point-projection backlighting, are discussed. Experimental images of exploding wires and wire arrays obtained on the BIN, XP, and MAGPIE generators using these techniques are presented. Also included are detailed measurements made on the XP generator of the emission characteristics of X pinches using different wire materials.

Źródło:

Nukleonika; 2001, 46, 1; 21-25
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 6.

Tytuł:

Wzorcowanie funkcji pomiaru czasu ekspozycji w miernikach promieniowania rentgenowskiego
Calibration of exposure duration in the X-ray analyser

Autorzy:

Urban, Arkadiusz
Czubla, Albin
Knyziak, Adrian

Powiązania:

https://bibliotekanauki.pl/articles/268140.pdf

Data publikacji:

2019

Wydawca:

Politechnika Gdańska. Wydział Elektrotechniki i Automatyki

Tematy:

wzorcowanie miernika promieniowania X
pomiar czasu ekspozycji
promieniowanie X
aparat rentgenowski
calibration
exposure time measurement
X-ray
X-ray machine
X-ray multimeter

Opis:

W artykule opisano problematykę pomiarów przedziałów czasu równych czasowi ekspozycji promieniowania X. Pokazano zależność niepewności pomiaru od metody pomiarowej oraz od sposobu działania źródła promieniowania rentgenowskiego. Przedstawiono wpływ zakresu przedziału czasu mierzonego przez miernik na wielkość błędu.
Main idea of the article is a description of problems of X-ray exposure time measurement. Content describes two types of X-ray machines. Among the two X-ray machine types, continuous type with shutter is more suitable for long time measurement, and pulse type is better for short time measurements. The article discuss differences between mode of operation of different X-ray sources and it’s impact on uncertainty of measurement of exposure time. It also discuss impact of different resolution settings of device under calibration on uncertainty measurement.

Źródło:

Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej; 2019, 66; 91-94
1425-5766
2353-1290

Pojawia się w:

Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 7.

Tytuł:

Recent measurements of soft X-ray emission from the DPF-1000U facility

Autorzy:

Surała, W.
Sadowski, M. J.
Paduch, M.
Zielinska, E.
Tomaszewski, K.

Powiązania:

https://bibliotekanauki.pl/articles/148171.pdf

Data publikacji:

2015

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

plasma focus
X-ray emission
X-ray images
gas puffing
filaments
hot spots

Opis:

Soft X-ray imaging is a very useful diagnostic technique in plasma-focus (PF) experiments. This paper reports results of four experimental sessions which were carried out at the DPF-1000U plasma-focus facility in 2013 and 2014. Over 200 discharges were performed at various experimental conditions. Measurements were taken using two X-ray pinhole cameras with a line of sight perpendicular to the z-axis, at different azimuthal angles (about 20° and 200°), and looking towards the centre of the PF-pinch column. They were equipped with diaphragms 1000 μm or 200–300 μm in diameter and coated with filters of 500 μm Al foil and 10 μm Be foil, respectively. Data on the neutron emission were collected with silver activation counters. For time-resolved measurements the use was made of four PIN diodes equipped with various fi lters and oriented towards the centre of the PF-column, in the direction perpendicular to the electrode axis. The recorded X-ray images revealed that when the additional gas-puff system is activated during the discharge, the stability of the discharge is improved. The data collected in these experiments confi rmed the appearance of a filamentary fi ne structure in the PF discharges. In the past years the formation of such fi laments was observed in many Z-pinch type experiments. Some of the recorded X-ray images have also revealed the appearance of the so-called hot- -spots, i.e. small plasma regions of a very intense X-ray emission. Such a phenomenon was observed before in many PF experiments, e.g. in the MAJA-PF device, but it has not been investigated so far in a large facility such as the DPF-1000U. The time-resolved measurements provided the evidence of a time lapse between the X-ray emission from plasma regions located at different distance from the anode surface. The formation of distinct ‘hot-spots’ in different instants of the DPF-1000U discharge was also observed.

Źródło:

Nukleonika; 2015, 60, 2; 303-308
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 8.

Tytuł:

High speed signal processing for photon counting X-ray detection

Autorzy:

Shinomiya, B.
Koike, A.
Morii, H.
Okunoyama, T.
Neo, Y.
Mimura, H.
Aoki, T.

Powiązania:

https://bibliotekanauki.pl/articles/385292.pdf

Data publikacji:

2009

Wydawca:

Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów

Tematy:

X-ray
CdTe
photon counting

Opis:

Recently practical X-ray measurement systems are demanded energy distinction function. Photon-counting CdTe semiconductor detectors have a high energy resolution in a low count rate condition at room temperature. However, the energy resolution is decreased by pile-up phenomenon in a high count rate condition. In conventional signal processing, processing time estimated X-ray photon energy from the pulse waveform is about tens of microseconds. This time is depended on the pulse decay time. This paper purposes to maintain the high energy resolution by changing the signal-processing algorithm, which derived the pulse rise height of the output waveform from the CdTe detector in a high count rate condition. As a result, the pulse rise time required to estimate the pulse rise height was short about 100 ns at incident X-ray energy 60 keV. As the result of energy spectrum by using this data, the FWHM of about 11keV (at 60 keV) when the count rate of 500 kcps. This result shows the possibility that the photon counting sensor has application for the high count rate imaging without decrease of the high energy resolution.

Źródło:

Journal of Automation Mobile Robotics and Intelligent Systems; 2009, 3, 4; 143-146
1897-8649
2080-2145

Pojawia się w:

Journal of Automation Mobile Robotics and Intelligent Systems

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 9.

Tytuł:

X-ray techniques in the investigation of a Gothic sculpture : the risen Christ

Autorzy:

Mikołajska, A.
Walczak, M.
Kaszowska, Z.
Urbańczyk-Zawadzka, M.

Powiązania:

https://bibliotekanauki.pl/articles/146866.pdf

Data publikacji:

2012

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

cultural heritage
X-ray image
X-ray dual source computed tomography (DSCT)
scanning electron microscopy energy dispersed X-ray spectroscopy (SEM-EDX)

Opis:

For over a century, X-ray radiation has played an important role in the area of the conservation and restoration of cultural heritage objects. X-ray techniques are amongst the most fundamental and helpful methods used in the investigation of art works. This paper reviews the application of traditional radiography, X-ray dual source computed tomography (DSCT) and scanning electron microscopy combined with energy dispersed X-ray spectroscopy (SEM-EDX) to the investigation of a wooden, Gothic sculpture, The risen Christ. Thanks to the properties of X-ray radiation (different absorption by various materials) first two methods allow the assessment of the preservation state and the observation of the internal structure of an object in 3-D. While SEM-EDX analysis permits the elemental analysis of the polychrome layers. As a result 2-D and 3-D images, permitting the full volume inspection of an object, were taken in a totally non-destructive way. The morphological and physical information about the inner structure of the investigated wooden sculpture was obtained, revealing changes related to previous restorations, as well as ageing effects. Employing the SEM-EDX, painting materials (pigments and filers), were identified. Gained data is essential for restorers to understand the whole structure of the studied object and to decide which further investigation and restoration steps have to be undertaken.

Źródło:

Nukleonika; 2012, 57, 4; 627-631
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 10.

Tytuł:

Preliminary study on X-ray source from Plasma Focus device for fast radiography

Autorzy:

Da Re, A.
Mezzetti, F.
Tartari, A.
Verri, G.
Rapezzi, L.
Gribkov, V. A.

Powiązania:

https://bibliotekanauki.pl/articles/147243.pdf

Data publikacji:

2001

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

plasma focus
X-ray sources

Opis:

Plasma derived flash X-ray sources may find potential applications in medicine and industry. Notwithstanding, as is the case of Plasma Focus (PF) devices, their characterisation in term of photon energy, temporal and spatial beam stability is far to be considered satisfactory. In this work, a radiographic approach, which avoids the effects caused by the intrinsic instability of the pinch output of a PF machine, is proposed and an attenuation curve can be attained even in presence of Xray emission instability. Using two radiographic films for each shot exposition symmetrically positioned and collimated to the pinch region the mean energy of the photons in the X-ray beam are evaluated. The X-ray emission symmetry from the pinch region was then utilised to control the validity of the proposed methodology.

Źródło:

Nukleonika; 2001, 46, suppl. 1; 123-125
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 11.

Tytuł:

Dense Plasma Focus as a powerful source of monochromatic X-ray radiation

Autorzy:

Dubrovsky, A.
Gribkov, V.
Ivanov, Y.
Karpiński, L.
Orlova, M.

Powiązania:

https://bibliotekanauki.pl/articles/147444.pdf

Data publikacji:

2006

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

dense plasma focus (DPF)
X-ray generation
X-ray dosimetry
exposure dose
absorbed dose

Opis:

A review of some experimental results obtained using the dense plasma focus (DPF) device PF-1000 is presented. The copper Ka1,2 radiation line generated by DPF in the case of device anode made of copper was the main object of this study. The predominance of this characteristic radiation over other kinds of radiation in the DPF X-ray spectrum is shown. A brief description of a new DPF 6.0 device as well as a radioenzymology experiment carried out within this device is presented.

Źródło:

Nukleonika; 2006, 51, 1; 21-28
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 12.

Tytuł:

Modelling of the soft X-ray tungsten spectra expected to be registered by GEM detection system for WEST

Autorzy:

Syrocki, Ł.
Szymańska, E.
Słabkowska, K.
Polasik, M.
Pestka, G.

Powiązania:

https://bibliotekanauki.pl/articles/971490.pdf

Data publikacji:

2016

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

X-ray spectra
tokamak
tungsten L, M, N, X-ray lines
GEM detection system

Opis:

In the future International Thermonuclear Experimental Reactor (ITER), the interaction between the plasma and the tungsten chosen as the plasma-facing wall material imposes that the hot central plasma loses energy by X-ray emission from tungsten ions. On the other hand, the registered X-ray spectra provide alternative diagnostics of the plasma itself. Highly ionized tungsten emits extremely complex X-ray spectra that can be understood only after exhaustive theoretical studies. The detailed analyses will be useful for proper interpretation of soft X-ray plasma radiation expected to be registered on ITER-like machines, that is, Tungsten (W) Environment in Steady-state Tokamak (WEST). The simulations of the soft X-ray spectra structures for tungsten ions have been performed using the flexible atomic code (FAC) package within the framework of collisional-radiative (CR) model approach for electron temperatures and densities relevant to WEST tokamak.

Źródło:

Nukleonika; 2016, 61, 4; 433-436
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 13.

Tytuł:

Synthesis and Characterization of Co-Cs-Nd-Sr-Doped Perovskite-Rutile-Type Structure

Autorzy:

Smolinski, T.
Zhao, L.
Rogowski, M.
Wawszczak, D.
Olczak, T.
Brykala, M.

Powiązania:

https://bibliotekanauki.pl/articles/355628.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

Synroc
X-ray diffraction
Rutherford backscattering
particle induced X-ray emission
Roentgen computed microtomography

Opis:

The perovskite type matrix is considered as solidification material for high-level radioactive waste. In this work the perovskite-rutile-type matrix doped by Co, Cs, Nd and Sr which simulate nuclear waste was prepared by sol-gel route. The material was characterized by several methods such as: X-ray diffraction, energy dispersive X-ray spectrometer, and particle induced X-ray emission combined with Rutherford backscattering spectrometry. The analyzes confirmed chemical composition Co-Cs-Nd-Sr-doped perovskite-rutile-type structure. A virtual model of the pellet`s structure was created non-destructively by Roentgen computed micro-tomography. The leaching tests confirmed high chemical resistance of the matrix.

Źródło:

Archives of Metallurgy and Materials; 2020, 65, 4; 1417-1423
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 14.

Tytuł:

X-ray tube with needle-like anode

Autorzy:

Słapa, M.
Straś, W.
Traczyk, M.
Dora, J.
Snopek, M.
Gutowski, R.
Drabik, W.

Powiązania:

https://bibliotekanauki.pl/articles/147038.pdf

Data publikacji:

2002

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

brachytherapy
photon needle
X-ray tube

Opis:

An X-ray tube with a needle-like anode (NAXT) built in our Laboratory, its design and basic operating parameters are presented. The process of electron beam forming and influence of external and internal magnetic fields is discussed. The tube properties essential from the point of view of its application in X-ray generators as well as disadvantageous thermal effects caused by flow of heat generated in the tube target to irradiated objects are discussed. The tube is almost a point-like source of X radiation emitted into 4đ geometry; the dose rates are on the order of 1 Gy/min at the distance of 10 mm from the anode cap. Preliminary tests show the tube may be useful in brachytherapy of cancer tumors of diameter up to 30 mm. The tube may also be an interesting device in widely understood field of irradiation techniques.

Źródło:

Nukleonika; 2002, 47, 3; 101-105
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 15.

Tytuł:

Multichannel calorimeters for measurement of flows of X-ray radiation in the range from 10 up to 200 keV

Autorzy:

Vinogradov, V. P.

Powiązania:

https://bibliotekanauki.pl/articles/148228.pdf

Data publikacji:

2001

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

calorimeter
hard X-ray
plasma focus

Opis:

An 8-channel calorimeter was developed and applied to the Plasma focus facility (PF) with flat geometry of electrodes (Filippov type) for the measurements of a hard X-ray (HXR) radiation yield and its spectral distribution. The calorimeter measures the time-integrated HXR flux for one shot of the PF facility without any additional calibrations. The sensitivity ~10–4 J/cm2 was achieved.

Źródło:

Nukleonika; 2001, 46, suppl. 1; 99-101
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 16.

Tytuł:

Structure data at 150 K for diammonium oxalate monohydrate, [NH4]2[C2O4][H2O]

Autorzy:

Mielniczek-Brzóska, E.
Dmytriv, G.
Pavlyuk, V.
Griffin, A.

Powiązania:

https://bibliotekanauki.pl/articles/410252.pdf

Data publikacji:

2013

Wydawca:

Uniwersytet Humanistyczno-Przyrodniczy im. Jana Długosza w Częstochowie. Wydawnictwo Uczelniane

Tematy:

oxalates
crystal structure
X-ray diffraction

Opis:

The single crystals of perfectly quality of the diammonium oxalate monohydrate, [NH4]2[C2O4][H2O], were obtained by the improved methods of crystal growth from solution. The crystal structure of title compound was studied at 150 K using modern X-ray equipment. At this temperature, as well as at room temperature, this compound crystallizes in the orthorhombic symmetry wiith P21212 space group. The unit cell of the title compound is formed by four amonium cations, two oxalate anions and water molecules, with a 2:1:1 cation-anion-water ratio. At 150 K oxalate ion is twisted by 26.9 (1)°. The similar twist angle (26.6 (4)° was observed at the room temperature. Central carbon-carbon bond in oxalate ion is insignificantly longer (1.568 Å) in comparing with this bond at room temperature (1.559 Å).

Źródło:

Chemistry, Environment, Biotechnology; 2013, 16; 73-78
2083-7097

Pojawia się w:

Chemistry, Environment, Biotechnology

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 17.

Tytuł:

Quantitative Characteristic X-Ray Analysis for Different Compound Samples by Using Monte Carlo Method

Autorzy:

Tekın, H.
Altunsoy, E.
Manici, T.
Yilmaz, B.

Powiązania:

https://bibliotekanauki.pl/articles/1030113.pdf

Data publikacji:

2017-09

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

Monte Carlo
characteristic X-ray
brass

Opis:

X-ray spectrometry is an elemental analysis technique with broad application in science and industry. It is based on the principle that individual atoms, when excited by an external energy source emit X-ray photons of a characteristic energy or wavelength. Here we obtained the characteristic X-ray peaks of different brass compounds and compared the intensity of characteristic peaks by changing with Zn rate. In this study we modelled different brass samples by using Monte Carlo method and changed the zinc rate in brass samples for each compound. We obtained the characteristic X-ray peaks of different compounds and compared the intensity of characteristic peaks by changing with Zn rate. We achieved a good agreement between peak intensity and corresponding element rate in compound. Also we obtained that characteristic peak rate increases by corresponding element rate in compound. This study shows that Monte Carlo method is very effective method to simulate material features due to their characteristic peaks and their intensities.

Źródło:

Acta Physica Polonica A; 2017, 132, 3; 439-441
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 18.

Tytuł:

57Fe Mössbauer spectroscopy and X-ray diffraction study of gadolinites REE2Fe2+Be2Si2O10 from Lower Silesia (Poland) and Ytterby (Sweden)

Autorzy:

Malczewski, D.

Powiązania:

https://bibliotekanauki.pl/articles/148858.pdf

Data publikacji:

2003

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

gadolinite
Mössbauer spectroscopy
X-ray diffraction

Opis:

This paper reports the results of 57Fe Mössbauer spectroscopy, X-ray diffraction (XRD) and gamma-ray spectroscopy studies of partially metamict gadolinites from Szklarska Poręba and Zimnik (Lower Silesia, Poland), a fully metamict gadolinite sample from Ytterby (Sweden) and a crystalline sample obtained after annealing of a fragment of the sample from Ytterby at 1373 K in an argon atmosphere. Both fully metamict and crystalline gadolinite show divalent iron exclusively in octahedral coordination. Changes of the amplitudes ratio of high energy to low energy absorption peaks from Fe2+ quadrupole doublets are strictly correlated with calculated absorbed alpha-dose and the metamictization stages of the gadolinite specimens. In this respect, one of the samples is in conflict with the estimated radiation dose based on age and radionuclide concentrations. In this case, Mössbauer spectroscopy shows that the sample had to be naturally annealed over geologic time.

Źródło:

Nukleonika; 2003, 48,suppl.1; 41-44
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 19.

Tytuł:

Conceptual design of Light Impurity Monitor for Wendelstein 7-X

Autorzy:

Książek, I.
Burhenn, R.
Musielok, J.

Powiązania:

https://bibliotekanauki.pl/articles/146640.pdf

Data publikacji:

2011

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

plasma spectroscopy
stellarator
soft X-ray

Opis:

As plasma impurity ions can significantly influence the properties of a fusion plasma by dilution and enhancement of the radiation losses, the process of monitoring of their concentrations is one of the most important tasks. A Light Impurity Monitor is needed for monitoring the contamination of the stellarator plasma by carbon, nitrogen, boron, and oxygen impurities, which are indicators for the overload of the plasma facing components, leakage of the vacuum vessel, or wall condition, respectively. Their concentration will be estimated on the basis of emission intensities of their hydrogen-like ions. In this paper a conceptual design of such a spectrometer is presented, including the description of the geometry, the acquisition system and safety systems.

Źródło:

Nukleonika; 2011, 56, 2; 155-160
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 20.

Tytuł:

The Behavior of Jordanian Oil Shale during Combustion Process from the El-Lajjun Deposit

Autorzy:

Gougazeh, Mousa
Alsaqoor, Sameh
Borowski, Gabriel
Alsafasfeh, Ashraf
Hdaib, Ismail I.

Powiązania:

https://bibliotekanauki.pl/articles/2173323.pdf

Data publikacji:

2022

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

El-Lajjun oil shale
combustion
X-ray diffraction
thermogravimetric
fourier transform infrared spectroscopy
X-ray fluorescence

Opis:

The results of X-ray diffraction, thermogravimetric and FTIR spectroscopy analyses of mineral composition indicated that the El-Lajjun oil shale is principally composed of calcite, quartz with minor amounts of kaolinite), gypsum, and apatite. The obtained oil shale ash products at 830 °C and 1030 °C are dominated by lime, quartz, anhydrite, portlandite, gehlenite, and amorphous phases. The TGA weight loss curves clearly indicate that it occurred in the temperature range from 310 to 650 °C. The decomposition of oil shale carbonates was detected above 750°C. The functional groups in the organic material of oil shale are dominated by the aliphatic hydrocarbons, the semi-ash of which had diverse structures of polycyclic aromatic hydrocarbons. The most intensive of combustion occurred in the temperature range of 400–750 °C. In this temperature range, about 75 wt.% was accounted for the total mass loss.

Źródło:

Journal of Ecological Engineering; 2022, 23, 8; 133--140
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 21.

Tytuł:

The concept of implementation of a clinical audit as a tool for evaluating quality management in X-ray diagnostics
Koncepcja realizacji audytu klinicznego jako narzędzia do oceny poziomu zarządzania jakością w rentgenodiagnostyce

Autorzy:

Sergot, M.

Powiązania:

https://bibliotekanauki.pl/articles/202713.pdf

Data publikacji:

2016

Wydawca:

Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej

Tematy:

clinical audit
management
quality
X-ray imaging
X-ray facilities
audyt kliniczny
zarządzanie
jakość
rentgenodiagnostyka
pracownia rtg

Opis:

The article discusses the clinical implementation of internal audits in enterprises that use ionizing radiation in X-ray diagnostics. The legal aspects involved in conducting clinical audits and their implementation are presented. Rules which have to be obeyed during an audit of a quality management system are compared in an analysis with the rules accommodated during a clinical audit led by state authorities. This analysis presents some similarities between the analyzed forms of checking the management system’s condition in X-ray diagnostics. In addition to similarities, there exist some differences also, and they are pointed out in this analysis, that is, elements that distinguish the audits from each other. Both a quality management system’s audit and control components can be used for a clinical audit. The author designed a simple workflow during the internal clinical audit. The conclusions of the analysis will be the subject of further research.
W artykule opisano problem wdrożenia wewnętrznych audytów klinicznych w przedsiębiorstwach wykorzystujących promieniowanie jonizujące w rentgenodiagnostyce. Przywołano prawne aspekty przeprowadzania audytów klinicznych oraz ich wdrażania. Dokonano analizy porównawczej reguł przeprowadzania audytów systemu zarządzania jakością z regułami przeprowadzania audytów klinicznych i regułami przeprowadzania kontroli organów państwowych. W konsekwencji tej analizy wskazano podobieństwa pomiędzy analizowanymi formami sprawdzania stanu systemu zarządzania w rentgenodiagnostyce. Zwrócono również uwagę na elementy odróżniające je od siebie, a także możliwość adaptacji elementów audytu systemu zarządzania jakością i elementów kontroli organów państwowych na rzecz audytu klinicznego. Opracowano prosty schemat postępowania podczas wewnętrznego audytu klinicznego. Wnioski z przeprowadzonej analizy stanowić będą przedmiot dalszych badań.

Źródło:

Zeszyty Naukowe Politechniki Poznańskiej. Organizacja i Zarządzanie; 2016, 69; 81-96
0239-9415

Pojawia się w:

Zeszyty Naukowe Politechniki Poznańskiej. Organizacja i Zarządzanie

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 22.

Tytuł:

Niezgodności z wymogami ochrony radiologicznej występujące w rentgenodiagnostyce oraz propozycje ich usunięcia
Radiodiagnostics and inconsistencies with the requirements of radiological protection along with propositions for their elimination

Autorzy:

Sergot, M.

Powiązania:

https://bibliotekanauki.pl/articles/179082.pdf

Data publikacji:

2017

Wydawca:

Centralny Instytut Ochrony Pracy

Tematy:

ochrona radiologiczna
promieniowanie jonizujące
rentgenodiagnostyka
bezpieczeństwo rtg
radiological protection
ionizing radiation
X-ray diagnostics
X-ray safety

Opis:

W artykule zaprezentowano podstawową problematykę z zakresu ochrony radiologicznej. Została również przeanalizowana aktualna sytuacja dotycząca niezgodności występujących podczas organizacji bezpieczeństwa pracy przy promieniowaniu rentgenowskim. Celem artykułu było opracowanie rozwiązania występujących niezgodności. Aby osiągnąć przedstawiony cel zaproponowano zmiany, które mogą mieć istotny wpływ na poprawę poziomu bezpieczeństwa pracowników na wybranym stanowisku oraz pacjentów. Dokonano analizy literatury z zakresu negatywnego oddziaływania promieniowania rentgenowskiego na organizm człowieka. Podzielono tak ze istniejące środki ochrony ze względu na osłonę dla pacjenta i pracownika oraz ogół ludności. Wykonano badania w 33 jednostkach ochrony zdrowia w celu weryfikacji stosowanej ochrony radiologicznej i niezgodności z nią związanych.
This article discusses some basic issues in radiological protection. It also analyzes problems in occupational safety related to X-rays. To solve those problems, it necessary to introduce several changes, which could significantly improve the level of safety of workers at selected workstations and patients. This article presents an analysis of the literature on the negative impact X-rays have on the human body, rays and a classification of existing safety measures according to whether they protect patients, personnel or the general population. To verify inconsistencies with the requirements of radiological protection, measurements were conducted at 33 health care facilities.

Źródło:

Bezpieczeństwo Pracy : nauka i praktyka; 2017, 5; 11-15
0137-7043

Pojawia się w:

Bezpieczeństwo Pracy : nauka i praktyka

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 23.

Tytuł:

Second order reflection from crystals used in soft X-ray spectroscopy

Autorzy:

Książek, I.

Powiązania:

https://bibliotekanauki.pl/articles/146093.pdf

Data publikacji:

2015

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

soft X-ray
plasma spectroscopy
PbSt
KAP

Opis:

In this note the ratio of the second to the first order reflection is determined for the KAP and PbSt crystals, for wavelengths corresponding to the Al K-line emission. The source of the radiation was a low-voltage stabilized X-ray tube. The X-rays were detected with a Bragg spectrometer equipped with a proportional counter detector. The signal measured by the proportional counter was subsequently pulse height analyzed.

Źródło:

Nukleonika; 2015, 60, 2; 263-265
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 24.

Tytuł:

Optimization of soft X-ray tomography on the COMPASS tokamak

Autorzy:

Imríšek, M.
Mlynář, J.
Löffelmann, V.
Weinzettl, V.
Odstrčil, T.
Odstrčil, M.
Tomeš, M.

Powiązania:

https://bibliotekanauki.pl/articles/146251.pdf

Data publikacji:

2016

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

soft X-ray
tomography
Tikhonov regularization
tokamak

Opis:

The COMPASS tokamak is equipped with the soft X-ray (SXR) diagnostic system based on silicon photodiode arrays shielded by a thin beryllium foil. The diagnostic is composed of two pinhole cameras having 35 channels each and one vertical pinhole camera with 20 channels, which was installed recently to improve tomographic inversions. Lines of sight of the SXR detectors cover almost complete poloidal cross section of the COMPASS vessel with a spatial resolution of 1–2 cm and temporal resolution of about 3 s. Local emissivity is reconstructed via Tikhonov regularization constrained by minimum Fisher information that provides reliable and robust solution despite limited number of projections and ill-conditionality of this task. Improved border conditions and numerical differentiation matrices suppressing artifacts in reconstructed radiation were implemented in the code. Furthermore, a fast algorithm eliminating iterative processes was developed, and it is foreseen to be tested in real-time plasma control.

Źródło:

Nukleonika; 2016, 61, 4; 403-408
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 25.

Tytuł:

Energy transformation in Plasma Focus discharge with wire and liner as a load

Autorzy:

Kubeš, P.
Kravárik, J.
Klír, D.
Scholz, M.
Paduch, M.
Tomaszewski, K.
Karpinski, L.
Ryc, L.
Juha, L.
Krasa, J.
Szydlowski, A.
Romanova, V.

Powiązania:

https://bibliotekanauki.pl/articles/147107.pdf

Data publikacji:

2002

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

plasma focus
X-ray source
XUV spectroscopy

Opis:

We present the results of experiments focused on energy transformations during the implosion of the hydrogen current sheath towards an Al wire (120 ěm in diameter) positioned on the top of the inner electrode of the PF-1000 plasma focus facility at the IPPLM in Warsaw. A wire corona is formed at the current sheath impact and ~60 ns after the impact a soft X-ray pulse is emitted. Its spectrum contains AlVI-XII lines accompanied by their satellites. The amount of emitted energy is recorded by two filtered PIN diodes and thermoluminescent dosimeters and depends on symmetry of the current sheath and quality of the current sheath focus. The mean value of energy of keV photons emitted in the runs done without the wire (~1 J) is higher than the energy obtained with the wire (~0.4 J). A time delay between the impact of the current sheath and X-ray pulse, the plasma focus dynamics and soft X-ray emission are interpreted by an axial magnetic field generation and transformations.

Źródło:

Nukleonika; 2002, 47, 4; 151-153
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 26.

Tytuł:

Synthesis and Characterization of the Energetic Compounds Aminoguanidinium-, Triaminoguanidiniumand Azidoformamidinium Perchlorate

Autorzy:

Klapötke, T. M.
Stierstorfer, J.

Powiązania:

https://bibliotekanauki.pl/articles/358855.pdf

Data publikacji:

2008

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego

Tematy:

perchlorates
energetic salts
calorimetry
X-ray
DSC

Opis:

Aminoguanidinium perchlorate (2, AGClO4) was formed by the reaction of aminoguanidinium bicarbonate (1) with aqueous perchloric acid solution. Triaminoguanidinium perchlorate (3, TAGClO4) was synthesized by nucleophilic attack of aqueous hydrazine solution on aminoguanidinium perchlorate under release of ammonia. The new and highly explosive azidoformamidinium perchlorate (4, AFClO4) was formed by the reaction of aminoguanidinium perchlorate with potassium nitrite under acidic conditions. The structures of the perchlorate salts in the crystalline state were determined using low temperature single crystal X-ray diffraction yielding monoclinic as well as orthorhombic structures. The compounds were characterized comprehensively using vibrational spectroscopy (IR and Raman), multinuclear (1H, 13C and 15N) NMR spectroscopy, elemental analysis and mass spectrometry. The thermal behavior as well as the decompositions were investigated using DSC (differential scanning calorimetry) and the heats of formation were calculated using heats of combustion determined by bomb calorimetric measurements. In addition, the sensitivities were evaluated using BAM methods (drophammer and friction tester), whereby the perchlorate salts are all sensitive towards impact as well as friction.

Źródło:

Central European Journal of Energetic Materials; 2008, 5, 1; 13-30
1733-7178

Pojawia się w:

Central European Journal of Energetic Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 27.

Tytuł:

A Quality Control Test for General X-Ray Machine

Autorzy:

AL-Jasim, Ali Kareem
Hulugalle, S.N.C.W.M.P.S.K.
Al-Hamadani, Haider Kamil

Powiązania:

https://bibliotekanauki.pl/articles/1178771.pdf

Data publikacji:

2017

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Quality Assurance
Quality Control
X-Ray Machine

Opis:

The aim of a quality assurance program is to assist a radio-diagnostic facility in consistently obtaining adequate radiological information with a minimum of dose and a minimum of cost. An integrated part of a quality assurance program is quality control ascertaining quality by measurements and other procedures. When procuring equipment, a specification is worked out taking into account all aspects of the performance of the equipment including the desired tolerances of technique factors. In this study the seven tests (beam alignment, beam collimation, reproducibility, accuracy of kv, time accuracy, half value layer (HVL) and leakage) were carried out for the newly installed General X-Ray machine at Nuclear Malaysia and were in the acceptable limits. Such a test will be the responsibility of a qualified physicist or engineer. The status test is carried out in order to establish the functional status of the equipment. The test is performed immediately after the acceptance test or as an integrated part of it. The test will be repeated when repair influencing the functional status has taken place like the acceptance test; the status test will comprise absolute measurements and will likewise be the responsibility of a qualified physicist or engineer.

Źródło:

World Scientific News; 2017, 90; 11-30
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 28.

Tytuł:

Influence of Calcium Ions on the Structure and Properties of LaMnO3

Autorzy:

Bara, M.
Dzik, J.
Feliksik, K.
Kozielski, L.
Wodecka-Duś, B.
Goryczka, T.
Zarycka, A.
Adamczyk-Habrajska, M.

Powiązania:

https://bibliotekanauki.pl/articles/353112.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

LCMO
ceramics
manganites
X-ray diffraction
SEM

Opis:

La_0,7 Ca_0,3 MnO₃ polycrystalline were synthesized from La₂ O₃ , CaO and MnO₂ powder mixture using a solid state reaction technique. The compound powders were obtained through the free sintering method at different temperatures and sintering times in order to study the influence of technological conditions on Ca doped La manganites. The most important physical features as structure, microstructure and morphology were described after X-ray diffraction investigation. Photographs of the specimen fractures were taken with SEM (scanning electron microscope) and they revealed high porosity of the tested material and great tendency for its grains to create agglomerates. Influence of doping and technological conditions on lattice parameters were studied by means of Rietvield analysis. The XRD measurements reveal that La_0,7 Ca_0,3 MnO₃ has orthorhombic symmetry with Pnma space group.

Źródło:

Archives of Metallurgy and Materials; 2020, 65, 3; 1189-1195
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 29.

Tytuł:

Investigation Of Intermetallic Compounds In Sn-Cu-Ni Lead-Free Solders
Badanie związków międzymetalicznych w bezołowiowych stopach lutowniczych Sn-Cu-Ni

Autorzy:

Nagy, E.
Kristaly, F.
Gyenes, A.
Gacsi, Z.

Powiązania:

https://bibliotekanauki.pl/articles/353266.pdf

Data publikacji:

2015

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

intermetallic
lead-free solder
X-ray diffraction

Opis:

Interfacial intermetallic compounds (IMC) play an important role in Sn-Cu lead-free soldering. The size and morphology of the intermetallic compounds formed between the lead-free solder and the Cu substrate have a significant effect on the mechanical strength of the solder joint. In the soldering process of Sn-Cu alloys, Cu₆Sn₅ intermetallic compounds are formed. The complex structural behaviour of Cu₆Sn₅ IMC is temperature- and composition-dependent and it is long since subject to scientific research. The Cu₆Sn₅ phase basically exists in two crystal structures: hexagonal η-Cu₆Sn₅ (at temperatures above 186°C) and monoclinic η’-Cu₆Sn₅ (at lower temperatures). In the presence of Ni in the solder, the η-η’ transformation does not occur, therefore, the η-Cu₆Sn₅ phase remains stable. In this study the role of Ni in the (Cu,Ni)₆Sn₅ intermetallic compound in Sn-Cu lead-free solders was examined. Sn-Cu alloys with different Cu content (0.5 to 1 mass%) were modified through Ni addition. The morphology of the intermetallic compounds of the modified Sn-Cu alloys was investigated by optical microscopy (OM) and scanning electron microscopy (SEM), the IMC phases were examined with X-ray diffraction method (XRD).

Źródło:

Archives of Metallurgy and Materials; 2015, 60, 2B; 1511-1515
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 30.

Tytuł:

Depth dependent X-ray diffraction of porous anodic alumina films filled with cubic YAlO3:Tb3+ matrix

Autorzy:

Serafińczuk, Jarosław
Pawlaczyk, Łukasz
Podhorodecki, Artur
Gaponenko, Nikolai
Molchan, Igor
Thompson, George

Powiązania:

https://bibliotekanauki.pl/articles/173841.pdf

Data publikacji:

2020

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

PAA
X-ray diffraction
AFM
SEM
crystallization

Opis:

The presented paper deals with the measurement methodologies of the structural properties of porous anodic alumina (PAA) films filled with YalO₃:Tb³⁺ composite using X-ray diffraction, atomic force microscopy and scanning electron microscopy. It shows that the deposited material does not uniformly fill the porous volume of the anodic alumina film and the part of it forms a thick layer on the PAA surface. The aim of this work is to show the differences in the XRD response obtained at different angles of incidence of the excitation beam for the PAA/YalO₃:Tb³⁺ system. Furthermore, this simple approach enables separation of the signal from both regions on the surface and inside the PAA pores, providing more accurate data interpretation. It reveals that the crystallization of the material on the PAA surface and within the pores is different.

Źródło:

Optica Applicata; 2020, 50, 1; 127-134
0078-5466
1899-7015

Pojawia się w:

Optica Applicata

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 31.

Tytuł:

Intrinsic linewidth calculation in an argon X-ray laser based on the model of geometrically dependent gain coefficient

Autorzy:

Hariri, A.
Sarikhani, S.

Powiązania:

https://bibliotekanauki.pl/articles/174753.pdf

Data publikacji:

2017

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

Ar X-ray laser
intrinsic linewidth
ASE

Opis:

By introducing differential amplified spontaneous emission intensity, numerical calculations for both homogeneously and Doppler broadened lines, and using the reported experimental measurements of the amplified spontaneous emission intensity and linewidth, we managed to explain the linewidth behavior, and calculate the intrinsic linewidth due to Voigt-profile width in an argon X-ray laser operating at 440 × 10^–3 torr argon pressure and current of 21 kA. For the calculation, the intensity rate equation, along with the model of geometrically dependent gain coefficient were applied. The calculated value of the intrinsic linewidth was found to be 55.67 mÅ, which is very close to the Doppler broadened line of 53.52 mÅ. That is, the collision broadening has a very small contribution to the light-matter interaction in argon X-ray lasers. Details of the procedure used for the calculation will be presented in this paper.

Źródło:

Optica Applicata; 2017, 47, 2; 325-335
0078-5466
1899-7015

Pojawia się w:

Optica Applicata

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 32.

Tytuł:

The Enlargement of Type II Burst After Type III at AR 12522 on 16th March 2016 In Conjunction With Flare-Related Coronal Mass Ejections Event

Autorzy:

Husien, Nurulhazwani
Hamidi, Z. S.
Shariff, N. N. M.
Ali, M. O.
Zainol, N. H.
Sabri, S. N. U.
Monstein, C.

Powiązania:

https://bibliotekanauki.pl/articles/1178545.pdf

Data publikacji:

2017

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Coronal Mass Ejections
Sun
X-ray emission

Opis:

On 16th March 2016 the solar radio burst type II is recorded to appear on spectrograph after the type III formation. These two bursts related to the Coronal Mass Ejections (CMEs) event that recorded by the SOHO spacecraft several minutes before the formation of Type III on the spectrograph. It has been reported that the Type III burst a fast drift compared to the Type II burst. In this paper, the calculation has been proved that the type III burst has a higher drift rate compared to Type II. These two events of Type II and III burst also has been contributing to the formation of C class flare with magnitude of C2.2 It is also proven that the type III burst has a fast drift rate compared to type II burst. In this case, the type III has a fast drift rate of 81% compared to the type II burst. During this event, the active region AR 12522 erupted the C-class X-ray emission with magnitude of C2.2 contribute to these type III and II burst

Źródło:

World Scientific News; 2017, 70, 2; 230-240
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 33.

Tytuł:

Effects of X-ray on fibroblast mechanical properties

Autorzy:

Heydarian, Ashkan
Khorramymehr, Siamak
Vasaghi-Gharamaleki, Behnoosh

Powiązania:

https://bibliotekanauki.pl/articles/280421.pdf

Data publikacji:

2019

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

viscoelastic
biomechanics
cellular mechanics
X-ray effects

Opis:

Concerning the widespread use of X-rays to detect various diseases, such as oral and dental ones, it is essential to study the effects of this radiation on living cells. From the past, genetic effects and cell death because of X-rays have been studied. In addition, the effect of this ionizing radiation on the mechanical properties of the cell and cytoskeleton has been studied, but different results have been obtained based on different models. In this study, post-culture gingival fibroblast cells were classified into two groups of control and radiation with Nano Magnetic Particles functionalized by folic acid. The cells of the radiation group were exposed to X-rays of 3 mGy·cm2 . The specimens were undergone static creep test by a magnetic tweezer. Spring and damper coefficients were obtained based on the viscoelastic solid modeling. The static and dynamic stiffness of the groups was also calculated. The maximum deformation was decreased after radiation from 0.049 ± 0.01 µm to 0.029 ± 0.01 µm and the static stiffness of the model was 1.6 times decreased. Also, the gel point frequency for the control group was 27 Hz and for the radiation group was 7.5 Hz. The results show that the static and dynamic stiffness of the cells decreases after radiation, and less deformation appears in the cells after irradiation. These changes can be due to the breakdown of membrane chemical bonds and activation of actin fibers after radiation.

Źródło:

Journal of Theoretical and Applied Mechanics; 2019, 57, 4; 999-1008
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 34.

Tytuł:

Refined design of a new driver for fast capillary discharge

Autorzy:

Koláček, K.
Boháček, V.
Šunka, P.
Řípa, M.
Kravárik, J.

Powiązania:

https://bibliotekanauki.pl/articles/148339.pdf

Data publikacji:

2001

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

fast capillary discharge
soft X-ray laser

Opis:

A new driver of the fast capillary discharge has been designed. It consists of the Marx generator and radial Blumline pulse forming line. Such a geometry enables axial access to both capillary ends (”transparent capillary”). This arrangement substantially simplifies the experiments (adjustment, monitoring, applications). The designed apparatus is capable of reaching the discharge current of the order of 120 kA and the discharge current rise time 2.9×1012 A/s, which is sufficient for the investigation of amplification in non-traditional electronic transitions.

Źródło:

Nukleonika; 2001, 46, suppl. 1; 45-47
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 35.

Tytuł:

Dena, a new PF device

Autorzy:

Tafreshi, M. A.
Farrahi, M.
Lamehi, M.
Goudarzi, S.
Habibi, H.
Memarzadeh, M.
Siahpoush, V.
Saeedzadeh, E.
Vinogradov, V. P.
Krauz, V. I.
Krivtsov, V. A.
Karakin, M. A.
Myalton, V. V.
Tykshaev, V. P.

Powiązania:

https://bibliotekanauki.pl/articles/148836.pdf

Data publikacji:

2001

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

Dena
focus
fusion
neutron
plasma
X-ray

Opis:

In this paper we are going to introduce “Dena”, a new Filippov type plasma focus facility, with a condenser bank of 0.288 mF, and a maximum supplying energy of 90 kJ (at Vmax= 25 kV). The facility was installed and started to work in the first quarter of the year 2000. Major points of the paper are: – Dena’s construction, functionality, and diagnostic system. – Preliminary results: Different modes of neutron, X-ray, and “hot spot” production, as well as the possibility of controlling operational mode, by changing anode configuration and initial discharge condition.

Źródło:

Nukleonika; 2001, 46, suppl. 1; 85-87
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 36.

Tytuł:

X-ray stress measurements in the institute of aviation possibilities and examples

Autorzy:

Gadalińska, E.
Malicki, M.

Powiązania:

https://bibliotekanauki.pl/articles/242492.pdf

Data publikacji:

2018

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

X-ray diffraction
residual stress measurements
fatigue

Opis:

From the point of view of the airplane construction, its fatigue lifetime and exploitation process, the stress states and levels are of crucial importance. The most appropriate experimental methods to determine stress values are diffraction methods with different radiation type employed. These methods allow the determination of the elastic lattice deformation and distortion (effectively the stress state) from the displacement and broadening of the diffraction peak. Diffraction methods are widely known as the experimental methods for determining not only the stress values but also the elastic properties of polycrystalline materials (also of all alloys types used in the aerospace industry). The advantages of diffraction experiments result from their non-destructive character and the possibility to obtain absolute values of stresses in different phases of each type of crystal material (the measurements are performed selectively only for crystallites contributing to the measured diffraction peak, i.e. for the grains having lattice orientations for which the Bragg condition is fulfilled). In the frame of this work, the laboratory possibilities of the Institute of Aviation in this area are presented as well as the exemplary results of stress measurements performed there.

Źródło:

Journal of KONES; 2018, 25, 3; 159-166
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 37.

Tytuł:

Refined design of a new driver for fast capillary discharge

Autorzy:

Kolácek, K.
Bohacek, V.
Schmidt, J.
Sunka, P.
Ripa, M.
Kravárik, J.

Powiązania:

https://bibliotekanauki.pl/articles/147571.pdf

Data publikacji:

2001

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

fast capillary discharge
soft X-ray laser

Opis:

A new driver of the fast capillary discharge has been designed. It consists of the Marx generator and radial Blumline pulse forming line. Such a geometry enables axial access to both capillary ends ("transparent capillary"). This arrangement substantially simplifies the experiments (adjustment, monitoring, applications). The designed apparatus is capable of reaching the discharge current of the order of 120 kA and the discharge current rise time 2.9×1012 A/s, which is sufficient for the investigation of amplification in non-traditional electronic transitions.

Źródło:

Nukleonika; 2001, 46, 3; 117-120
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 38.

Tytuł:

Preparation of Samples used in Fatigue Testing of Aircraft Materials

Autorzy:

Manaj, W.
Wronicz, W.
Michałowski, A.

Powiązania:

https://bibliotekanauki.pl/articles/98020.pdf

Data publikacji:

2015

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Lotnictwa

Tematy:

mechanical processing
stress measurement
X-ray diffraction

Opis:

The application of a new type of alloy requires the evaluation of its properties, which is typically achieved with destructive methods. For this purpose, among others, static and fatigue mechanical tests are performed. Tests are performed on standardized samples in a way which reflects the level of stress occurring in real elements. These tests should limit random errors associated with sample preparation. For this reason the proper preparation of samples is crucial, not only in terms of their geometric dimensions but also in terms of the residual stress level. A sample preparation process was developed, involving checking samples’ surface for cracks, scratches, roughness, and the state of stress. The measurements are performed with nondestructive methods so as not to affect the proceeding research. In this study, the residual stress and features of a mechanically prepared surface were characterized. The specimens were subjected to various surface finishes mainly, lathe turning and grinding surface conditions. The effects of residual surface stress (measured by XRD) were studied after machining and polishing.

Źródło:

Fatigue of Aircraft Structures; 2015, 7; 66-68
2081-7738
2300-7591

Pojawia się w:

Fatigue of Aircraft Structures

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 39.

Tytuł:

Mechanically Stimulated Changes in Surface Electrical Conductivity of X-Irradiated Silicon Crystals

Autorzy:

Lys, Roman
Żyłka, Marta
Shykorjak, Josyp
Slobodzyan, Dmytro
Żyłka, Wojciech
Pavlyk, Bohdan

Powiązania:

https://bibliotekanauki.pl/articles/2201919.pdf

Data publikacji:

2023

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

X-ray irradiation
silicon
uniaxial deformation
dislocation

Opis:

Changes in the resistance of single crystals of p-type conductivity silicon under the action of mechanical loading were investigated in this research. Also, non-irradiated and pre-irradiated X-rays experimental samples were studied. It was found that at small deformation values when they are at the initial stage of the action of elastic deformation, a section forms and increases, on which the resistance practically does not depend on the applied mechanical load. In irradiated crystals, at small deformation values, electron generation processes dominate, which then recombine with the main carriers – holes. The consequence of such processes is the appearance of a maximum increase in electrical resistance at the initial stage of elastic deformation of experimental samples irradiated with X-rays. Charge carrier generation processes begin to dominate with further deformation. Such processes occur as a result of the release of acceptor centers from other complex defects, which are destroyed during the deformation of the Si crystal and captured by mobile dislocations. Thus, the processes of generation of charge carriers prevail over the processes of gettering and, accordingly, a mechano-stimulated decrease in the electrical resistance of p-Si samples occurs.

Źródło:

Advances in Science and Technology. Research Journal; 2023, 17, 2; 226--231
2299-8624

Pojawia się w:

Advances in Science and Technology. Research Journal

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 40.

Tytuł:

Techniki dyfrakcji rentgenowskiej

Autorzy:

Bonarski, J

Powiązania:

https://bibliotekanauki.pl/articles/273763.pdf

Data publikacji:

2013

Wydawca:

Roble

Tematy:

dyfrakcja rentgenowska
mikrostruktura
rentgenowska ilościowa analiza fazowa
RIAF
rentgenowska tomografia teksturowa
RTT
mikroskopia akustyczna
X-ray diffraction
microstructure
X-ray quantitative phase analysis
X-ray texture chromatography
acoustic microscopy

Źródło:

LAB Laboratoria, Aparatura, Badania; 2013, 18, 4; 26-30
1427-5619

Pojawia się w:

LAB Laboratoria, Aparatura, Badania

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 41.

Tytuł:

Application of High-Energy Laser coupled with Gamma – Lonizing Irradiations as New Sterilizing Technique

Autorzy:

Elsabawy, Khaled M.

Powiązania:

https://bibliotekanauki.pl/articles/1192077.pdf

Data publikacji:

2016

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Nd-Laser
Gamma-ray
Sterilizing
X-Ray
SEM
AFM

Opis:

The present investigations introduce for first time new trend of coupling of two sterilizing sources, high energy Nd-Laser and Gamma – irradiations which has oxidative nature by additional to its thermal effects. The investigated samples will be examined before and after radiations to confirm its internal structure (XRD, microstructure (SEM, AFM, Raman-Spectra) and killing ratio for polluted bacteria. Furthermore some selected biological tests will be checked to be sure from toxicity ratio after radiations. Also many of investigational parameters will be tested such as strength of irradiation dose and irradiation dosage time to achieve maximum healthy sterilizing ratio per minimum time to validate application and wide scale application of this promising sterilizing technique.

Źródło:

World Scientific News; 2016, 37; 61-75
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 42.

Tytuł:

High resolution x-ray tomography as a tool for analysis of internal textures in meteorites

Autorzy:

Krzesińska, A.

Powiązania:

https://bibliotekanauki.pl/articles/411476.pdf

Data publikacji:

2011

Wydawca:

Polskie Towarzystwo Meteorytowe

Tematy:

NWA-5929
Ghubara
Pułtusk
wysoka rozdzielczość X-ray tomografii komputerowej
deformacja
high resolution X-ray computed tomography
deformation

Opis:

A comparison of internal textures of the NWA-5929, Ghubara and Pułtusk chondrites has been carried out using high resolution X-ray tomography. This is a powerful, non-destructive technique that allows on to determine textural and compositional dierences that occur between ordinary chondrites of various groups by means of grey-levels calehistograms, first-order statistics, and 3D imaging. Deformational structures in the Pułtusk meteorite such as cataclastic zones, impact melt clasts, melt veins, and melt pockets are observed and studied. Measurements of metal particle size are achieved, giving even deeper insight into textural features of meteorite. My approach shows that as shock deformation occurred, numerous small metal grains became progressively dispersed within the volume of the deformed Pułtusk meteorite rock. Simultaneously, metal was mobilized via frictional or direct impact melting to form scarce large metal nodules or grains arranged along the margins of relict chondritic clasts or as components of irregular injection veining. The possibility of tracing of these impact related processes by using tomography micrograms (without breaking the sample) is very useful for distinguishing which parts of each meteorite were deformed in diferent ways in order to make first order observations regarding the deformational history of these meteorites.

Źródło:

Meteorites; 2011, 1, 1; 3-12
2299-0313
2299-1220

Pojawia się w:

Meteorites

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 43.

Tytuł:

X-ray diffraction and Mössbauer spectroscopy studies of a mechanosynthesized Fe75B25 alloy

Autorzy:

Jartych, E.
Kubalova, L. M.
Fadeeva, V. I.

Powiązania:

https://bibliotekanauki.pl/articles/146344.pdf

Data publikacji:

2015

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

mechanosynthesis
metastable phase
Mössbauer spectroscopy
X-ray diffraction

Opis:

In this work, the process of formation of metastable phases was investigated for the Fe75B25 composition. Mechanical synthesis was performed in a MAPF-2M high-energy planetary ball mill under an argon atmosphere. X-ray diffraction (XRD), differential scanning calorimetry (DSC), and Mössbauer spectroscopy (MS) were applied to recognize the phases. After 6 h of milling, the material consisted of two phases, that is, metastable tetragonal t-Fe2B and amorphous phases. During further thermal processing, the metastable phase was transformed into the stable Fe2B phase.

Źródło:

Nukleonika; 2015, 60, 1; 43 -46
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 44.

Tytuł:

Three-channel X-ray detection head for diagnostics of plasma in noisy environment

Autorzy:

Ryć, L.
Kaczmarczyk, J.
Martinez, J. F.
Scholz, M.
Słysz, M.

Powiązania:

https://bibliotekanauki.pl/articles/148717.pdf

Data publikacji:

2001

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

high-temperature plasma
semiconductor detector
X-ray diagnostics

Opis:

A compact, three-channel, noise-resistant detection head based on semiconductor detectors has been built for the diagnostics of X-ray emission from plasmas. It is useful in the energy range of 0.5–20 keV.

Źródło:

Nukleonika; 2001, 46, suppl. 1; 95-97
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 45.

Tytuł:

Observation of intrapulse energy switching in standing-wave electron linac

Autorzy:

Matusiak, Michał
Kosiński, Tymoteusz
Wronka, Sławomir
Zakrzewski, Tomasz

Powiązania:

https://bibliotekanauki.pl/articles/2173383.pdf

Data publikacji:

2022

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

cargo scanning
dual-energy imaging
X-ray imaging

Opis:

For the development of an effective cargo-scanning system, an intrapulse energy switching has been tested at the National Centre for Nuclear Research (NCBJ) with the possibility to change the beam energy within a 4 μs pulse of the linear electron accelerator (linac). Modifi cation of the electron energy is achieved through the beam-loading effect in a standing-wave accelerating structure equipped with a triode gun. Construction of the machine and the achieved results are presented in this article.

Źródło:

Nukleonika; 2022, 67, 3; 43--47
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 46.

Tytuł:

Metal-induced asthma and chest X-ray changes in welders

Autorzy:

Wittczak, Tomasz
Dudek, Wojciech
Walusiak-Skorupa, Jolanta
Świerczyńska-Machura, Dominika
Cader, Wojciech
Kowalczyk, Monika
Pałczyński, Cezary

Powiązania:

https://bibliotekanauki.pl/articles/2180086.pdf

Data publikacji:

2012-06-01

Wydawca:

Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi

Tematy:

welders
metals
occupational asthma
chest X-ray changes

Opis:

Objectives: The aim of this study was to evaluate the coexisting factors and usefulness of diagnostic methods in metal-induced asthma in Polish welders. Materials and Methods: Examination of 50 welders occupationally exposed to metals and with suspicion of metal-induced asthma (group A), 100 welders occupationally exposed to metals but without suspicion of metal-induced asthma (group B), and two control groups (10 patients with atopic asthma and 10 healthy subjects) was carried out. Questionnaire survey, clinical examination, skin prick tests to common aeroallergens and metal salts, rest spirometry tests, X-ray, metacholine challenge and a single-blind, placebo controlled specific inhalation challenge tests with metals (or work-like conditions challenge tests) were performed. Results: In group A – in 9 cases we obtained positive results of specific inhalation challenge tests with metals (in 3 cases with nickel, in 4 cases with chromium, in 1 case with cobalt and in 1 case with manganese). Nine cases of metal-induced occupational asthma were recognized. In group B – only in one case we obtained positive results of work-like conditions challenge test (clinical and spirometry changes, eosinophil influx in induced sputum), which confirmed the diagnosis of occupational asthma. In most of examined welders (62%), pulmonary changes in chest X-ray images were noted. The statistical analysis revealed that working as a welder for more than 10 years is the coexisting factor of presence of chest X-ray changes (p- or q-type nodular changes or interstitial changes). Positive results of skin prick tests with metal salts were the coexisting factors of occupational asthma due to metals among examined group of welders. Conclusions: Specific inhalation challenge plays the key role in diagnostics of metal-induced asthma in welders. Pulmonary changes in chest X-ray were found in a significant percentage of examined welders.

Źródło:

International Journal of Occupational Medicine and Environmental Health; 2012, 25, 3; 242-250
1232-1087
1896-494X

Pojawia się w:

International Journal of Occupational Medicine and Environmental Health

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 47.

Tytuł:

X-Ray Diffraction Measurements for Riveted Joints. The Application of a Novel Methodology

Autorzy:

Gadalińska, E.
Kaniowski, J.

Powiązania:

https://bibliotekanauki.pl/articles/97767.pdf

Data publikacji:

2012

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Lotnictwa

Tematy:

X-ray diffraction method
stress measurements
riveted joints

Opis:

The X-ray diffraction method is the best, widely available, non-destructive measurement method used to determine the residual and load stresses in crystalline materials. This method can be applied without any limitations to flat specimens. Depending on the equipment geometry, the type of material and geometry of the specimen, there are many limitations, restrictions and recommendations which have to be fulfilled to obtain reliable results. This was the reason for working out a methodology for X-ray diffraction stress measurements for riveted specimens.The first case to analyze is the necessity of choosing an X-ray tube suitable for the specimen material which will give the diffraction peaks in the range of 2Θ angles between 120° and 180°. Afterwards it is crucial to make the best selection of Bragg's angle 2Θ. In the vast majority of cases the best selection is the possibly biggest 2Θ angle because of the best accuracy of the measurement. However, for example for aluminum alloys (for Cr_Kα radiation), this choice is not so obvious. It is much more convenient to perform measurements not for the highest diffraction angle. The best selection in this case is 2Θ=139,3°, and not 156,7°. Other selections which are necessary to be made before measurements are the collimator diameter, time of exposure, ψ tilts and φ oscillations. The proper selection of these parameters is crucial for the fast and efficient performing of measurements and for obtaining reliable results. Before performing the measurement, especially in the case of the specimen with complicated geometry (for example in the case of riveted specimens made of aluminum alloys), it is necessary to analyze the results obtained paying special attention to the possibility of the appearing of the rivet head/driven rivet head shadow during the measurement. The work describes differences between the X-ray stress measurement results obtained without any interference and the results received after eliminating the selected diffraction peaks for which the shadow of rivet head/driven rivet head has appeared.

Źródło:

Fatigue of Aircraft Structures; 2012, 4; 17-28
2081-7738
2300-7591

Pojawia się w:

Fatigue of Aircraft Structures

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 48.

Tytuł:

Research on the X-ray wavelength division multiplexing technology for blackout region communication

Autorzy:

Li, Yao
Su, Tong
Sheng, Lizhi
Xu, Neng
Zhao, Baosheng

Powiązania:

https://bibliotekanauki.pl/articles/1835966.pdf

Data publikacji:

2020

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

X-ray communication
plasma sheath
wavelength division multiplexing

Opis:

After the concept of X-ray communication was proposed, its application in complex electromagnetic environment has received more attention, such as data transmission in re-enter special electro-magnetic condition. In this article, a new type of X-ray source was introduced firstly, which was expected to generate multiple characteristic lines and achieve wavelength division multiplexing technology in X-ray band. Then an experimental platform was built for analyzing transmission characteristics of X-ray photon in various plasma media. Finally, the calculation model for a link power equation was given. Experiment results show that transmittance of 8–18 keV X-ray signal is relatively stable, atomic numbers from 29 to 42 are the most suitable materials for wavelength division multiplexing, the X-ray communication system is expected to realize about 200 kbps data transmission rate in adjacent space.

Źródło:

Optica Applicata; 2020, 50, 4; 619-632
0078-5466
1899-7015

Pojawia się w:

Optica Applicata

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 49.

Tytuł:

Residual stresses measurements with X-ray diffractometry on aluminum specimens - determination of the most suitable parameters of measurement

Autorzy:

Gadalińska, E.
Kaniowski, J.

Powiązania:

https://bibliotekanauki.pl/articles/245743.pdf

Data publikacji:

2009

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

X-ray diffractometry
residual stresses
fatigue
aluminum alloys

Opis:

The work was done as apart of the IMPERJA Eureka Project. The goal of the IMPERJA project is to increase the fatigue life of riveted joints, which will lead to an increase of the aircraft service life, a smaller number of inspections and lower operation costs of an aircraft. The consortium intends to meet this goal by investigating and improving the riveting process as well as improving the prediction methods for fatigue life. Riveting is the most commonly used method of joining sheet metal components of the aircraft structure. Typically, the number of rivets ranges from several thousands to some millions in a single aircraft depending on the specific aircraft type and size. The riveted joints are critical areas of the aircraft structure due to severe stress concentrations and effects such as fretting and secondary bending. Therefore the fatigue crack initiation will start at the rivets holes. Fatigue crack initiation usually occurs at a number of rivet holes (multiple site damage), which may lead to widespread fatigue damage and reduced residual strength. Although the literature on the fatigue behaviour of riveted joints is quite abundant, many aspects are still not sufficiently understood and investigated and, therefore, they require a further study. The work contains the results of stress measurements obtained with X-ray diffractometer. The aim of the work was to determine the stress values after different kinds of treatment, to check what are the limits of the x-ray measurement for aluminum alloys and to obtain the most suitable measurement parameters for this kind of alloy. There were 5 kinds of specimens: -specimen no. l - technically pure aluminum, specimen annealed in temperature 300° C for l hour, -specimen no. 2 - technically pure aluminum, raw state without any additional treatment, -    -specimen no. 3 - technically pure aluminum, squeezed perpendicularly to the axis direction, force: l00 kN, longitudinal intersection, specimen no. 4 - technically pure aluminum, squeezed perpendicularly to the axis direction, force: 100 kN, transverse intersection, specimen no. 5 - PA24 alloy, 05 bar, squeezed along the axis of the rod, force: l3,9 kN, longitudinal intersection. The second part of the work contains the measurements of the stress distribution around the rivets. The specimen prepared to realize this kind of measurements had four areas. The rivets on every area were riveted with the different riveting force: 1.2 kN; 1.4 kN; 1.5 kN and 1.55 kN.

Źródło:

Journal of KONES; 2009, 16, 4; 123-134
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 50.

Tytuł:

Size/Strain Diffraction Peak Broadening of the Energetic Materials FOX-7, RDX and ADN

Autorzy:

Herrmann, M.
Forter-Barth, U.
Kempa, P. B.

Powiązania:

https://bibliotekanauki.pl/articles/358820.pdf

Data publikacji:

2009

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego

Tematy:

X-ray diffraction
microstructure
FOX-7
RDX
ADN

Opis:

X-ray powder diffraction (XRD) is an established tool for the investigation of energetic materials. Whereas positions and intensities of diffraction peaks yield information on the crystal structure, peak profles are related to the real structure described by crystallite size, shape and microstrain. A series of energetic materials were measured at the synchrotron ANKA, and the size/strain broadening of FOX-7, RDX and ADN is discussed in relation to crystal structures and properties.

Źródło:

Central European Journal of Energetic Materials; 2009, 6, 2; 183-193
1733-7178

Pojawia się w:

Central European Journal of Energetic Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 51.

Tytuł:

Reproducibility conditions for the pulsed X-ray emission in a vacuum spark discharge

Autorzy:

Georgescu, N.
Serbãnescu, C. G.
Sandolache, G.

Powiązania:

https://bibliotekanauki.pl/articles/148262.pdf

Data publikacji:

2001

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

plasma focus
reproducibility
vacuum spark
X-ray emission

Opis:

In our laboratory, a 1 kJ vacuum spark device is developed as a pulsed X-ray source for X-ray detector calibration and applications such as X-ray microscopy and microlithography. After our previous works for the X-ray emission maximization (up to around 10 J per pulse), this paper analyses the influence of four different triggering systems on the X-ray emission reproducibility. The main conclusion is that a high-power, very fast high voltage trigger pulse is required. In order to fulfill these conditions, a pulse transformer and an air spark gap have been added to the initial triggering device (a magnetic pulse compression circuit). With the new trigger pulse (20 J/pulse, 50 ns rise-time, 22 kV amplitude in an open circuit) a reasonable X-ray emission reproducibility is obtained.

Źródło:

Nukleonika; 2001, 46, suppl. 1; 17-20
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 52.

Tytuł:

Investigation of low temperature diffusion of carbon in martensite by Mössbauer spectroscopy and X-ray diffraction

Autorzy:

Jabłońska, A.
Dąbrowski, L.
Suwalski, J.
Neov, S.

Powiązania:

https://bibliotekanauki.pl/articles/147492.pdf

Data publikacji:

2006

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

martensite
diffusion coefficients
Mössbauer specroscopy
X-ray studies

Opis:

Martensite containing 0.87 wt.% carbon was studied by Mössbauer spectroscopy at temperatures, T = 10, 15, 25, 40 and 78 K and by X-ray diffraction at T = 78 K in the course of 35 days. Samples in the form of 30 mm thick foil of pure carbon martensite with enhanced tetragonality were synthesized applying non-standard technology. The measured by X-rays (c/a - 1) ratio varies within the limits 0.044-0.055 by pulsations with a period of few hours. According to Kurdimov’s model any changes in tetragonality of martensite are fully related to the passage of carbon atoms from Oc to Oa and Ob octahedral sites or vice versa. Pulsations of the central and satellite sextets were observed by Mössbauer spectroscopy. In accordance with the conventional interpretation of satellites, these pulsations result from different spatial distribution of carbon around the Fe atoms in the diffusion process. The data of (c/a - 1) pulsations were used to determine the diffusion coefficient below 78 K. The measured diffusion coefficient of carbon in a-iron below 78 K contradicts the classical approach to the observed temperature dependence. As the temperature is lowered below 78 K, the diffusion constant approaches the nearly temperature-independent value. The low temperature branch is apparently characteristic of a quantum mechanical process dominated by tunnelling in the ground state.

Źródło:

Nukleonika; 2006, 51, 2; 101-104
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 53.

Tytuł:

Application of X-Ray Diffraction to Analyse Phase Composition of Aluminium Alloys for Plastic Working

Autorzy:

Pachut, K.
Żelechowski, J.
Boczkal, S.

Powiązania:

https://bibliotekanauki.pl/articles/354144.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

aluminium alloys
X-ray diffraction
qualitative phase analysis

Opis:

An attempt was made to determine phase composition of commercial aluminium alloys using X-ray diffraction. Samples for phase composition analysis were selected from the group of aluminium alloys covered by the EN 573-3:2013 standard [1]. Representative samples were taken from eight groups of alloys with different chemical composition (at least one sample from each group). The diffraction intensity was measured with a standard X-ray diffractometer in Bragg-Brentano geometry in a way that allowed identification of the weakest diffraction peaks. As a results of the performed research it has been shown that X-ray phase analysis can be used to identify the matrix of aluminium alloys, Si and crystalline intermetallic phases such as Mg₂Si, Al_93.38Cu_6.02Fe₂₄Si_16.27, Al_4.01MnSi_0.74, MgZn₂, Al₁₇ (Fe_3.2Mn_0.8)Si₂, Al₆₅Cu₂₀Fe₁₅, and Cu₃Mn₂Al. The detectability limit of the above-mentioned phases is better than 0.5%. The research has also shown that X-ray phase analysis is applicable in the investigation of phase transformations taking place in aluminium alloys.

Źródło:

Archives of Metallurgy and Materials; 2019, 64, 4; 1315-1319
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 54.

Tytuł:

Enormous Eruption of 2.2 X-class Solar Flares on 10th June 2014

Autorzy:

Hamidi, Z. S.
Shariff, N. N. M.

Powiązania:

https://bibliotekanauki.pl/articles/411754.pdf

Data publikacji:

2014

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

sun
X-ray region
solar flare
active region

Opis:

The observational of active region emission of the Sun contain an critical answer of the time-dependence of the underlying heating mechanism. In this case, we investigate an X2.2 solar flare from a new Active Region AR2087 on the southeast limb of the Sun. The solar flare peaked in the X-rays is around 11:42 UT. It was found that the snapshot of this event from the Solar Dynamics Observatory (SDO) channel with the GOES X-ray plot overlayed. The flare is very bright causes by a diffraction pattern. We explore a parameter space of heating and coronal loop properties. Based on the wavelength, it shows plasma around 6 million Kelvin. At the same time, data from the NOAA issued an R3 level radio blackout, which is centered on Earth where the Sun is currently overhead at the North Africa region. This temporary blackout is caused by the heating of the upper atmosphere from the flare. The blackout level is now at an R1 and this will soon pass. Other than the temporary radio blackout for high frequencies centered over Africa this event will not have a direct impact on us. Until now, we await more data concerning a possible Coronal Mass Ejections (CMEs) but anything would more than likely not head directly towards Earth. An active region AR2087 just let out an X1.5 flare peaking at 12:52 UT. This shows plasmas with temperatures up to about 10 Million Kelvin. This event is considered one of the massive eruption of the Sun this year.

Źródło:

International Letters of Chemistry, Physics and Astronomy; 2014, 17, 3; 249-257
2299-3843

Pojawia się w:

International Letters of Chemistry, Physics and Astronomy

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 55.

Tytuł:

Crystal structures of ErGe2 and TmGe2 compounds

Autorzy:

Matvijishyn, R.
Pavlyuk, V.
Shpyrka, Z.
Serkiz, R.

Powiązania:

https://bibliotekanauki.pl/articles/410283.pdf

Data publikacji:

2010

Wydawca:

Uniwersytet Humanistyczno-Przyrodniczy im. Jana Długosza w Częstochowie. Wydawnictwo Uczelniane

Tematy:

rare earths phases
crystal structure
X-ray diffraction

Opis:

Crystal structures of ErGe2 and TmGe2 compounds were determined by X-ray single crystal diffraction. Both TmGe2 and ErGe2 crystallized with the ZrSi2 structure type (space group Cmcm).

Źródło:

Chemistry, Environment, Biotechnology; 2010, 14; 35-40
2083-7097

Pojawia się w:

Chemistry, Environment, Biotechnology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 56.

Tytuł:

Experimental study of X-ray emission yield in a Filippov-type Plasma Focus operating in neon and neon-krypton mixture

Autorzy:

Babazadeh, A.
Roshan, M.
Kiai, S.

Powiązania:

https://bibliotekanauki.pl/articles/147028.pdf

Data publikacji:

2002

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

Filippov-type plasma focus
gas admixture
X-ray

Opis:

Since the installation of PF-DENA at AEOI about one year ago, we performed quantitative studies of variation of X-ray radiations from a new Filippov-type plasma focus device: Dena (90 kJ, 25 kV, 288 ěF). The operating gas was neon at a constant low pressure of 1 torr and different pressures of krypton admixture (up to 0.3 torr), with the discharge voltage up to 18 kV. For a charging voltage of 17 kV with 41 kJ stored energy and spark gap pressure of 1.2×10-2 torr, the maximum soft and little hard X-ray (SXR-HXR) emission is found for the neon, resulting in a total SXR yield of 2 V/shot measured by silicon semiconductor diode detectors. Concerning the effect of krypton admixture, a maximum intensity of SXR radiation has been observed at low krypton pressure that is about 1 V/shot. At higher pressure, the quantity of the SXR emission decreases down to zero. However, the maximum intensity of the HXR radiation yield in the same pressure range was found to be 2.5 V/shot. By increasing the pressure of krypton up to 0.3 torr, the results show that the krypton admixture gas generally causes, a decrease of the SXR radiation yield down to zero, whereas, the HXR emission yield carries a maximum value at the optimum pressure of krypton that is about 0.1 torr. Nevertheless, the pressure increments of krypton admixture lead to decreasing in the discharge voltage for the maximum X-ray production.

Źródło:

Nukleonika; 2002, 47, 3; 123-125
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 57.

Tytuł:

Application of X-ray fluorescence techniques for the determination of hazardous and essential trace elements in environmental and biological materials

Autorzy:

Bamford, S.
Wegrzynek, D.
Chinea-Cano, E.
Markowicz, A.

Powiązania:

https://bibliotekanauki.pl/articles/147255.pdf

Data publikacji:

2004

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

biological material
environmental materials
X-ray fluorescence analysis

Opis:

The utilization of X-ray fluorescence technique for the determination of trace element concentrations in environmental and biological samples is presented. The analytical methods used include energy dispersive X-ray fluorescence with polarizing secondary targets, total reflection X-ray fluorescence, direct in-situ X-ray fluorescence, and micro-beam X-ray fluorescence spectrometry. These methods were applied to analysis of different samples including soil, water, plant material and airborne particulate matter collected on polycarbonate filters. The performance and achieved detection limits of elements for different techniques, established by measuring appropriate reference standards, are presented. Also described is the utilization of micro-beam X-ray fluorescence technique for studying element distribution in heterogeneous samples and investigating the 2D- and 3D-morphology of minute samples by means of computerized X-ray absorption and X-ray fluorescence tomography. The different X-ray techniques have their unique advantages. The micro-beam X-ray fluorescence set-up has an advantage of producing very well collimated primary X-ray beam (about 15 mm in diameter), in front of which the analyzed sample can be precisely positioned, providing local information about the sample composition. The energy dispersive X-ray fluorescence with secondary targets offers rapid analysis of broad range of elements (Na–U) combined with a simple sample preparation method. Total reflection X-ray fluorescence technique, characterized by the lowest detection limits of elements, has its leading edge in analysis of liquid samples, and dealing with particle size effects in air particulates collected on filter papers. In-situ X-ray fluorescence spectrometers are truly portable and enable on the spot, in field analysis. It is shown that the combination of several XRF methods

Źródło:

Nukleonika; 2004, 49, 3; 87-95
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 58.

Tytuł:

Zastosowanie radiografii przemysłowej w badaniach obiektów kultury materialnej
Application of industrial radiography in research of tangible cultural heritage

Autorzy:

Głuszewski, Wojciech

Powiązania:

https://bibliotekanauki.pl/articles/214583.pdf

Data publikacji:

2019

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

konserwacja dzieł sztuki
archeologia
rentgenografia przemysłowa
rentgenografia cyfrowa
conservation of works of art
archeology
industrial x-ray
digital x-ray

Opis:

W artykule przedstawiono przykład wykorzystania przez Międzynarodowy Instytut Spawalnictwa w Belgradzie przemysłowego systemu radiografii cyfrowej do badania obiektów istotnych dla dziedzictwa kulturowego. Prace te są prowadzone wspólnie z Instytutem Badań Jądrowych Vinča. Instytut ten zlokalizowany jest opodal słynnego stanowiska eponimicznego w Vinča na przedmieściach Belgradu. Neolityczna kultura archeologiczna Vinča rozwijała się w Europie południowo – wschodniej od około 5500 do około 4000 p.n.e.
The article presents an example of the use of the industrial digital radiography system by the International Welding Institute in Belgrade to study objects of importance for cultural heritage. These works are carried out jointly with the Vinča Nuclear Research Institute. This institute is located near the famous eponymous site in Vinča on the outskirts of Belgrade. The Neolithic archaeological culture of Vinča developed in south-eastern Europe from around 5500 to around 4000 BC.

Źródło:

Postępy Techniki Jądrowej; 2019, 4; 35-37
0551-6846

Pojawia się w:

Postępy Techniki Jądrowej

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 59.

Tytuł:

Porównanie wyników badań metrologicznych uzyskanych za pomocą rentgenowskiej tomografii komputerowej i skanera optycznego 3D
Comparison of the results of metrological tests obtained from X-ray computed tomography and optical 3D scanner

Autorzy:

Tchórz, A.
Gil, A.

Powiązania:

https://bibliotekanauki.pl/articles/391594.pdf

Data publikacji:

2014

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Odlewnictwa

Tematy:

metrologia 3D
skanowanie 3D
rentgenowska tomografia komputerowa (X-ray CT)
optyczny skaner 3D
metrology 3D
3D scanning
X-ray computed tomography (X-ray CT)
optical 3D scanner

Opis:

Istotnym czynnikiem decydującym o jakości wyrobów jest wprowadzenie nowych metod w dziedzinie metrologii technicznej. W pracy przedstawiono metodykę analizy badań metrologicznych uzyskanych za pomocą tomografu komputerowego i skanera optycznego 3D. Urządzenia te umożliwiły uzyskanie wirtualnych obiektów oraz pozwoliły na przeprowadzenie trójwymiarowych analiz przestrzennych. Przedstawiono zasadę działania tych urządzeń oraz przeanalizowano ich możliwości na przykładzie wytypowanych odlewów. Wyniki badań przedstawiono za pomocą określonych wymiarów oraz mapy kolorów na powierzchni modelu. Dokonano oceny dokładności pomiarów w poszczególnych metodach.
The launch of new methods in the technical metrology area is a material factor determining the quality of the products. The paper presents the methodology of analysis of metrological tests conducted with the use of computed tomography and an optical 3D scanner. These devices allowed us to obtain virtual objects and conduct 3D spatial analyses. The paper presents the operating principle of these devices and analyses their capabilities based on selected castings. The results of the tests are presented with the support of determined dimensions and colour maps on the model surface. The accuracy of measurements in individual methods was assessed.

Źródło:

Prace Instytutu Odlewnictwa; 2014, T. 54, nr 4, 4; 63-75
1899-2439

Pojawia się w:

Prace Instytutu Odlewnictwa

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 60.

Tytuł:

Wykorzystanie przekształceń obrazowych do poprawy czytelności zdjęć RTG
Application of image transformations in improvement of readability of X-ray images

Autorzy:

Szarek, A.

Powiązania:

https://bibliotekanauki.pl/articles/98945.pdf

Data publikacji:

2008

Wydawca:

Politechnika Śląska. Katedra Biomechatroniki

Tematy:

zdjęcia RTG
promieniowanie rentgenowskie
analiza obrazów
analiza komputerowa
diagnostyka medyczna
X-ray images
X-ray
image analysis
computer analysis
medical diagnostics

Opis:

Do prawidłowej oceny zmian układu kostnego oraz przebudowy kości po implantacji protezy niezbędna jest dobra jakość RTG. Nie zawsze jednak po wywołaniu kliszy możliwa jest jednoznaczna ocena zmian ze względu na słabą jakość zdjęcia, a dodatkowe prześwietlenie pacjenta wiąże się z zwiększeniem dawki promieniowania. W artykule podjęto próbę przystosowania komputerowej analizy obrazu do poprawy czytelności zdjęć RTG.
More and more advanced diagnostics technologies enable very precise assessment of skeleton state and determination of degenerative changes. Due to the fact that top diagnostics technologies are very expensive, X-ray images are mostly taken. In order to perform proper assessment of changes in bone system and bone remodelling after prosthesis implantation, a high quality of X-ray images is necessary. However, unequivocal assessment of changes is not always possible after film developing due to low quality of images and additional X-ray examination is connected with patient being exposed to increased radiation dose. This paper describes the attempts made to adjust computer image analysis in order to improve readability of X-ray images.

Źródło:

Aktualne Problemy Biomechaniki; 2008, 2; 151-154
1898-763X

Pojawia się w:

Aktualne Problemy Biomechaniki

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 61.

Tytuł:

Ultrafast X-ray introspective imaging of metallic objects using a Plasma Focus

Autorzy:

Moreno, C. H.
Clausse, A.
Martínez, J. F.
Llovera, R.
Tartaglione, A.

Powiązania:

https://bibliotekanauki.pl/articles/146595.pdf

Data publikacji:

2001

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

dense plasmas
electrical discharges
plasma focus
X-ray imaging
X-rays

Opis:

A compact-chamber 4.7 kJ, 30 kV, Plasma Focus operated in deuterium was used as a ultrafast high intensity radiation source for introspective radiographic imaging of metallic objects. The samples to be imaged were located outside the Plasma Focus chamber, about 1 m away from the chamber wall. A high-sensitivity, fast-response commercial radiographic film was used as a X-ray detector. Experimentally obtained images are presented showing a very high penetration power of the X-ray beam, demonstrating that the presented compact-chamber Plasma Focus is suited for introspective visualisation of pieces manufactured on metal.

Źródło:

Nukleonika; 2001, 46, suppl. 1; 33-34
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 62.

Tytuł:

Pomiar długozasięgowego odchylenia od płaskości powierzchni płytek Si za pomocą HR XRR
Measurement of long range surface flatness deviation of Si wafers by means of HR XRR method

Autorzy:

Mazur, K.
Sass, J.
Surma, B.
Piątkowski, B.
Wnuk, A.
Gładki, A.
Turos, A.

Powiązania:

https://bibliotekanauki.pl/articles/192401.pdf

Data publikacji:

2008

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Technologii Materiałów Elektronicznych

Tematy:

płytka Si
reflektrometria rentgenowska
Si wafers
X-Ray reflectrometry

Opis:

Opracowano metodę oszacowania stopnia długozasięgowego odchylenia od płaskości powierzchni za pomocą rentgenowskiej metody reflektometrycznej XRR w układzie niezwierciadlanym (non - specular). Otrzymane wyniki dla ośmiu płytek krzemowych o zróżnicowanej grubości porównano z wynikami uzyskanymi za pomocą innych metod: (1) optycznej (w przypadku próbek grubości < 200 μm), (2) z wykorzystaniem stykowego miernika grubości (TSK) (dla próbek o grubości > 200 μm). Pomimo różnych założeń dla porównywanych metod uzyskano wystarczająco dobrą zgodność wyników co świadczy o użyteczności opracowanej metody.
The adaptation of the non-specular X-ray reflectivity method to control the long range random deviation of the surface flatness were done. The results obtained for eight Si samples were compared with the ones obtained (1) by optical method (for the samples < 200 μm in thickness), (2) by contact thickness gage (TSK) measurements, (for samples > 200 m in thickness). Despite of the rather rough assumptions made for compared methods, a sufficiently good conformity has been obtained. This is important conclusion confirms the usefulness of the proposed X-ray method

Źródło:

Materiały Elektroniczne; 2008, T. 36, nr 3, 3; 5-22
0209-0058

Pojawia się w:

Materiały Elektroniczne

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 63.

Tytuł:

Influence of Ce3+ doping on the algal inhibiting properties of copper/sepiolite nanofibers

Autorzy:

Zhang, C. C.
Duan, X.
Ding, Y.
Srinivasakannan, C.

Powiązania:

https://bibliotekanauki.pl/articles/207260.pdf

Data publikacji:

2017

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

copper
x ray diffraction
alga
miedź
dyfrakcja rentgenowska
glon

Opis:

Algal inhibiting materials were synthesized by the co-impregnation method. Cerium was taken as an algal inhibiting agent with copper/sepiolite utilized as the carrier. The algal growth inhibition was assessed based on the form of presence and distribution of Cu²⁺ and Ce³⁺ ions on the surface of sepiolite using X-ray diffraction (XRD) and SEM analysis. The results indicate that at 5 wt. % Cu content, 0.8 wt. % Ce and after heat treatment at 400 °C, the materials exhibit the best algal inhibiting capacity of 83.11%.

Źródło:

Environment Protection Engineering; 2017, 43, 4; 253-263
0324-8828

Pojawia się w:

Environment Protection Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 64.

Tytuł:

Determination of hyperfine fields and atomic ordering in NiMnFeGe exhibiting martensitic transformation

Autorzy:

Satuła, D.
Szymański, D.
Rećko, K.
Olszewski, W.
Kalska-Szostko, B.

Powiązania:

https://bibliotekanauki.pl/articles/147672.pdf

Data publikacji:

2015

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

X-ray diffraction
Mössbauer spectroscopy
martensitic transition
atomic ordering

Opis:

The hyperfi ne fi elds and atomic ordering in Ni1−xFexMnGe (x = 0.1, 0.2, 0.3) alloys were investigated using X-ray diffraction and Mössbauer spectroscopy at room temperature. The X-ray diffraction measurements show that the samples with x = 0.2, 0.3 crystallized in the hexagonal Ni2In-type of structure, whereas in the sample with x = 0.1, the coexistence of two phases, Ni2In- and orthorhombic TiNiSi-type of structures, were found. The Mössbauer spectra measured with x = 0.2, 0.3 show three doublets with different values of isomer shift (IS) and quadrupole splitting (QS) related to three different local surroundings of Fe atoms in the hexagonal Ni2In-type structure. It was shown that Fe atoms in the hexagonal Ni2In-type structure of as-cast Ni1−xFexMnGe alloys are preferentially located in Ni sites and small amount of Fe is located in Mn and probably in Ge sites. The spectrum for x = 0.1 shows the doublets in the central part of spectrum and a broad sextet. The doublets originate from the Fe atoms in the paramagnetic state of hexagonal Ni2In-type structure, whereas the sextet results from the Fe atoms in orthorhombic TiNiSi-type structure.

Źródło:

Nukleonika; 2015, 60, 1; 127-131
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 65.

Tytuł:

Measurements of fast electron beams and soft X-ray emission from plasma-focus experiments

Autorzy:

Surała, W.
Sadowski, M. J.
Kwiatkowski, R.
Jakubowski, L.
Żebrowski, J.

Powiązania:

https://bibliotekanauki.pl/articles/147850.pdf

Data publikacji:

2016

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

electron beams
X-ray emission
plasma focus
hot spots

Opis:

The paper reports results of the recent experimental studies of pulsed electron beams and soft X-rays in plasma-focus (PF) experiments carried out within a modifi ed PF-360U facility at the NCBJ, Poland. Particular attention was focused on time-resolved measurements of the fast electron beams by means of two different magnetic analyzers, which could record electrons of energy ranging from about 41 keV to about 715 keV in several (6 or 8) measuring channels. For discharges performed with the pure deuterium fi lling, many strong electron signals were recorded in all the measuring channels. Those signals were well correlated with the fi rst hard X-ray pulse detected by an external scintillation neutron-counter. In some of the analyzer channels, electron spikes (lasting about dozens of nanoseconds) and appearing in different instants after the current peculiarity (so-called current dip) were also recorded. For several discharges, fast ion beams, which were emitted along the z-axis and recorded with nuclear track detectors, were also investigated. Those measurements confi rmed a multibeam character of the ion emission. The time-integrated soft X-ray images, which were taken side-on by means of a pinhole camera and sensitive X-ray fi lms, showed the appearance of some fi lamentary structures and so-called hot spots. The application of small amounts of admixtures of different heavy noble gases, i.e. of argon (4.8% volumetric), krypton (1.6% volumetric), or xenon (0.8% volumetric), decreased intensity of the recorded electron beams, but increased intensity of the soft X-ray emission and showed more distinct and numerous hot spots. The recorded electron spikes have been explained as signals produced by quasi-mono-energetic microbeams emitted from tiny sources (probably plasma diodes), which can be formed near the observed hot spots.

Źródło:

Nukleonika; 2016, 61, 2; 161-167
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 66.

Tytuł:

Point defects in the B2 - phase region of the Fe-Al system studied by Mössbauer spectroscopy and X-ray diffraction

Autorzy:

Hanc-Kuczkowska, A.

Powiązania:

https://bibliotekanauki.pl/articles/147904.pdf

Data publikacji:

2013

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

iron aluminides
Mössbauer spectroscopy
point defects
X-ray diffraction

Opis:

In this work Mössbauer spectroscopy and X-ray powder diffraction was used to study of point defects formation in intermetallic phases of the B2 structure of the Fe-Al system as a function of Al concentration. The results are compared with the concentrations of point defects determined from positron annihilation data. The values of the 57Fe isomer shift and quadrupole splitting for the components describing the point defects in the local environment of a Mössbauer nuclide are presented. The concentration of the Fe vacancies and Fe atoms substituting Al (i.e. anti-site atom, Fe-AS) are determined. The results show that an increase in Al content causes an increase in vacancy and Fe-AS concentrations.

Źródło:

Nukleonika; 2013, 58, 1; 123-126
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 67.

Tytuł:

Identification of sandstone-related rocks composition using the X-ray analysis

Autorzy:

Kosuth, M.

Powiązania:

https://bibliotekanauki.pl/articles/344037.pdf

Data publikacji:

2013

Wydawca:

nakł. Maciej Pawlikowski

Tematy:

X-ray analysis
mineral composition
sandstones
siltstones
calcite
dolomite

Opis:

The article presents knowledge based on investigation of sandstones or siltstones composition from the Paleogene flysch terrains in North-East Slovakia. Samples of frequently crumbling clastic rocks were commonly considered to be close to sandstones, composed by predominant quartz. The set of such samples, belonging to Dukla Unit Sandstones were analyzed using the XRD analyses. Beside of quartz the diffraction patterns gave the evidence in significant carbonate share with some minor to minute feldspars, mica and chlorite contents. Among majority of analyzed samples we distinguish three groups of sandstones: (1) with the abundant calcite admixture, (2) the sandstones which contain meaning dolomite portion. The group (3) is representing the samples is formed the same by quartz as by both of carbonates, each of them could form important up to prevailed mineral component. Comparison of analyzed samples mineral composition shows remarkable trend of higher calcite and dolomite contents in younger clastic sediments.

Źródło:

Auxiliary Sciences in Archaeology, Preservation of Relics and Environmental Engineering; 2013, 16; 1-7
1689-6742

Pojawia się w:

Auxiliary Sciences in Archaeology, Preservation of Relics and Environmental Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 68.

Tytuł:

2-Tetrazene Derivatives as New Energetic Materials; Synthesis, Characterization and Energetic Properties

Autorzy:

Miró Sabaté, C.
Delalu, H.

Powiązania:

https://bibliotekanauki.pl/articles/358238.pdf

Data publikacji:

2014

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego

Tematy:

2-tetrazene
energetic materials
X-ray diffraction
NMR spectroscopy

Opis:

The oxidation of 1,1-dimethylhydrazine with aqueous monochloramine yielded (E)-1,1,4,4-tetramethyl-2-tetrazene (1) as a pale yellow liquid with hypergolic properties. 1 can be oxidized with potassium permanganate to form (E)-1-formyl-1,4,4-trimethyl-2-tetrazene (2) and (E)-1,4-diformyl-1,4dimethyl-2-tetrazene (3). Additionally, 1 reacts with a diethyl ether solution of monochloramine to form a stable 1,1,4,4-tetramethyl-2-tetrazenium chloride salt (4). The chloride in salt 4 was exchanged with various energetic anions, such as nitrate (5), perchlorate (6), 5,5´-azobistetrazolate (7*6H2O), picrate (8) and azide (9). All materials were characterized by analytical and spectroscopic methods and the solid state structures of compounds 2-8 were elucidated. Due to the energetic nature of these materials, they were submitted to friction and impact sensitivity tests and DSC analysis was used to assess their thermal stabilities. Furthermore, the heats of formation of compounds 2-8 were computed using quantum mechanical methods (CBS-4M) and their detonation parameters (pressure and velocity) and specific impulses were also calculated. Lastly, the 2-tetrazene derivatives presented here are of potential interest either as building blocks or as a new class of low toxicity, low sensitivity energetic materials.

Źródło:

Central European Journal of Energetic Materials; 2014, 11, 4; 515-537
1733-7178

Pojawia się w:

Central European Journal of Energetic Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 69.

Tytuł:

Wyniki analiz spektrometrycznych dwóch dzbanów fenickich z kolekcji gołuchowskiej

Autorzy:

Krueger, Michał
Głuszek, Inga

Powiązania:

https://bibliotekanauki.pl/articles/1023876.pdf

Data publikacji:

2018-07-31

Wydawca:

Uniwersytet im. Adama Mickiewicza w Poznaniu

Tematy:

X-ray fluorescence spectrometry analyses
Phoenician jugs
Gołuchów collection

Opis:

This paper presents results of the spectrometric analyses of two Phoenician jugs from the Gołuchów collection. A non-invasive portable X-ray fluorescence spectrometer (pXRF) has been used to determine the chemical composition of the jugs. The aim of this work was to add new results to a database of spectrometric data of Phoenician pottery from central and western Mediterranean. Good agreement obtained between the chemical results of the two jugs suggest  that they could have been made from the same clay.

Źródło:

Folia Praehistorica Posnaniensia; 2017, 22; 271-285
0239-8524
2450-5846

Pojawia się w:

Folia Praehistorica Posnaniensia

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 70.

Tytuł:

A comparison between the crystal and solution structures of Escherichia coli asparaginase II.

Autorzy:

Kozak, Maciej
Jurga, Stefan

Powiązania:

https://bibliotekanauki.pl/articles/1043790.pdf

Data publikacji:

2002

Wydawca:

Polskie Towarzystwo Biochemiczne

Tematy:

structure in solution
small angle X-ray scattering
asparaginase

Opis:

The small angle X-ray scattering (SAXS) pattern of the homotetrameric asparaginase II from Escherichia coli was measured in solution in conditions resembling those in which its crystal form was obtained and compared with that calculated from the crystallographic model. The radius of gyration measured by SAXS is about 5% larger and the maximum dimension in the distance distribution function about 12% larger than the corresponding value calculated from the crystal structure. A comparison of the experimental and calculated distance distribution functions suggests that the overall quaternary structure in the crystal and in solution are similar but that the homotetramer is less compact in solution than in the crystal.

Źródło:

Acta Biochimica Polonica; 2002, 49, 2; 509-513
0001-527X

Pojawia się w:

Acta Biochimica Polonica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 71.

Tytuł:

Uranium - Doping Effects on Structural and Spectral Features of Vanadate Ceramics

Autorzy:

Elsabawy, Khaled M.

Powiązania:

https://bibliotekanauki.pl/articles/1192708.pdf

Data publikacji:

2016

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

212 Vanadate
Ceramic
ESR
IR
Uranium Doping
X- ray

Opis:

212-Vanadate ceramics with formula Bi2SrV2-xUxO9, where (0 ≤ x ≤ 0.6 mole ) were carefully synthesized by solution routes with sintering temperature at 880oC for 24 hrs. Structural analysis with XRD proved that uranium (IV)-dopant can substitute successfully until x = 0.55 mole on the Bi-layered perovskite crystal structure without damaging the original structure . It was observed that U – doping have slight to moderate effects on both ESR-signals and conduction mechanism of U-doped Bi-Sr-V-O regime. Electrical measurements indicated that the energy gap Eg and number of electrons in conduction band Ncb increase as the ratio of U doping increases from x = 0.05 till x = 0.6 mole respectively due to the increasing of paramagnetic character of uranium than vanadium.

Źródło:

World Scientific News; 2016, 30; 103-116
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 72.

Tytuł:

Computer system for analysis of X-ray images of wheat grains

Autorzy:

Strumillo, A.
Niewczas, J.
Szczypinski, P.
Makowski, P.
Wozniak, W.

Powiązania:

https://bibliotekanauki.pl/articles/24261.pdf

Data publikacji:

1999

Wydawca:

Polska Akademia Nauk. Instytut Agrofizyki PAN

Tematy:

wheat
grain
computer system
X-ray image
image analysis

Źródło:

International Agrophysics; 1999, 13, 1
0236-8722

Pojawia się w:

International Agrophysics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 73.

Tytuł:

Thermal decomposition characterization of supergene potassium-jarosite and sodium-jarosite minerals from the northern Tibetan Plateau, China

Autorzy:

Chen, L.

Powiązania:

https://bibliotekanauki.pl/articles/949691.pdf

Data publikacji:

2018

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

potassium-jarosite
sodium-jarosite
thermogravimetric analysis
X-ray diffraction

Opis:

The thermal decomposition of supergene potassium-jarosite and sodium-jarosite samples from the weathering profiles of sulfide deposits in the northern Tibetan Plateau, China, was investigated. Electron microprobe, scanning electron microscopy, and X-ray diffraction analyses indicated the presence of nearly pure potassium-jarosite and sodium-jarosite. Thermogravimetric analysis of the potassium-jarosite sample revealed mass losses of 11.39 wt% at 443.0 °C, 20.99 wt% at 688.3 °C, and 3.18 wt% at 779.3 °C. The thermogravimetric analysis of sodium-jarosite revealed mass losses of 11.72 wt% at 447.5 °C, 21.32 wt% at 682.6 °C, and 3.70 wt% at 716.5 °C. The results provide no evidence for water-molecule loss below 400 °C, as has been reported previously for natural potassium-jarosite and sodium-jarosite. Thermal-decomposition mechanisms have been proposed for potassium-jarosite and sodium-jarosite based on X-ray diffraction analyses of samples obtained at distinct points along the respective thermal decomposition processes. A comparison of the thermal analysis patterns of potassium-jarosite and sodium-jarosite indicates that sodium-jarosite undergoes the initiation of lattice destruction at a higher temperature.

Źródło:

Physicochemical Problems of Mineral Processing; 2018, 54, 2; 459-466
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 74.

Tytuł:

Which diagnostic method should be used in which age interval in the diagnosis of adenoid hypertrophy?
Którą z metod diagnostycznych należy stosować w celu rozpoznawania przerostu migdałka gardłowego u dzieci w poszczególnych grupach wiekowych?

Autorzy:

Kaya, Kamil Hakan
Bilece, Zeki Tolga
Acıpayam, Harun
Koçak, Hasan Emre
Ulusoy, Hüseyin Avni
Keskin, Mehmet

Powiązania:

https://bibliotekanauki.pl/articles/1399795.pdf

Data publikacji:

2018

Wydawca:

Index Copernicus International

Tematy:

Adenoid hypertrophy
flexible
endoscopy
lateral nasopharynx X-ray
nasopharyngoscopy

Opis:

Aim: This study aims to determine the age interval for which the flexible nasopharyngoscopy (FNP) and lateral nasopharyngeal X-ray radiography (LNX) used in the diagnosis of adenoid hypertrophy more effectively in a pediatric population. Study Design: Prospective Cohort Study. Materials and Methods: 281 pediatric patients (1 to 15 years old) who were admitted to our ENT outpatient clinic with the complaints of nasal obstruction, snoring, sleep apnea through April 2016 and February 2017 and who were examined with FNP with the pre-diagnosis of adenoid hypertrophy were included in our study. All FNP examinations were evaluated by a single physician. The degree of choanal obstruction was recorded as percentage (%) with the help of the adenoid tissue image. The patients were divided into four groups according to the quality of the endoscopic examination performed during FNP examination; optimal assessment (group-1), assisted optimal assessment (group-2), assisted suboptimal assessment (group-3), and inability to assess despite assistance (group-4). LNX was performed for the re-evaluation of adenoid tissue in the patients in Group-3 and 4. Statistical analysis was performed among the groups according to the ages of the patients. Results: Optimal images were obtained with FNP in the patients aged between 1 and 2 years and 8-15 years and the expected images were obtained for choanal obstruction. However, no image could be obtained with FNP for assessment of choanal obstruction in more than 30% of patients between the ages of 3 and 8 years (31.2% and 33.3%, respectively), also in more than 50% of the patients who were 4,5,6 and 7 years old (60.6%, 56.7%, 55.8%, 66 , 6%, respectively). For this reason, their degrees of choanal obstruction were determined with LNX. Conclusion: For the optimal assessment of adenoid hypertrophy, we suggest that using LNX for the pediatric patients who are 4, 5, 6 and 7 years old and using FNP for the other age groups are more appropriate methods respectively in order not to disturb the polyclinic process of physician and for patient compliance.

Źródło:

Polski Przegląd Otorynolaryngologiczny; 2018, 7, 3; 50-54
2084-5308
2300-7338

Pojawia się w:

Polski Przegląd Otorynolaryngologiczny

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 75.

Tytuł:

Analysis of adsorption of heavy metals from water solutions by wood of selected domestic species using X-Ray Fluorescence (XRF)

Autorzy:

Balicka, Adrianna
Szadkowski, Jan

Powiązania:

https://bibliotekanauki.pl/articles/2200144.pdf

Data publikacji:

2020

Wydawca:

Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie

Tematy:

X-Ray Fluorescence Spectroscopy
wood shaving
adsorption
heavy metals

Opis:

Analysis of adsorption of heavy metals from water solutions by wood of selected domestic species using X-Ray Fluorescence (XRF).The aim of this study was to analyze the absorption of three specific heavy metals from model water solution by wood species from domestic Polish forests. This paper focuses on XRF method to determine metal content in samples. European aspen (Populus tremula L.) and Black locust (Robinia pseudoacacia L.) have been chosen. Firstly, shavings were prepared and soaked with standard solutions of lead (II) nitrate, cadmium nitrate and mercury (II) chloride for 7 days. Then, the material was dried and reduced to ashes using muffle furnace. Finally, content of absorbed metal was marked (XRF) and analyzed with a view to initial contents of metal ions in standard solutions. It was established, that the higher the concentration of mercury in standard solution is, the higher impulse counts is obtained for European aspen. This reversal of the dependence is noticeable for second analyzed species.
Badanie adsorpcji metali ciężkich z modelowych roztworów wodnych przez drewno wybranych gatunków krajowych za pomocą Spektrometrii Fluorescencji Rentgenowskiej (XRF). Celem wykonanych badań było sprawdzenie poziomu adsorpcji wytypowanych metali ciężkich tj. ołowiu, kadmu oraz rtęci, przez dwa gatunki rodzime topolę (Populus tremula L.) oraz robinię akacjową (Robinia pseudoacacia L.). W fazie przygotowawczej materiał został znacznie rozdrobniony i rozdzielony na kilka frakcji. Działanie to miało na celu zwiększenie powierzchni adsorpcji badanego drewna. Azotan kadmu (II), azotan ołowiu oraz chlorek rtęci (II) zostały rozpuszczone w destylowanej wodzie w takich proporcjach, aby stworzyć po cztery roztwory – każdy o innym stężeniu. Wybrana frakcja wiórów została poddana obróbce termicznej w wodzie destylowanej w celu usunięcia zawartego powietrza. Następnie frakcję podzielono na próbki 1 gramowe. Drewno nasiąkało w modelowych roztworach przez ok. 168 godzin. Finalnie zostało ono odsączone, wysuszone i spopielone w piecu muflowym. Tak przygotowane próbki zostały poddane badaniu z wykorzystaniem spektrometrii fluorescencji rentgenowskiej (XRF). Urządzenie analizowało zawartość metali w pyle za pomocą dwóch różnych programów i trzech czasów naświetlania. Otrzymane wartości analizowano pod kątem ilościowym a nie jakościowym.

Źródło:

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology; 2020, 111; 73--82
1898-5912

Pojawia się w:

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 76.

Tytuł:

Application of Laboratory Diffraction Methods in Characterization of Elements Made By Additive SLM Methods - State of the Art

Autorzy:

Gadalińska, Elżbieta
Pawliszak, Łukasz
Moneta, Grzegorz

Powiązania:

https://bibliotekanauki.pl/articles/2105183.pdf

Data publikacji:

2021

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Lotnictwa

Tematy:

X-ray diffraction
residual stress measurements
additive manufacturing
SLM

Opis:

The greatest challenge of widely developed incremental manufacturing methods today is to obtain, as a result of the manufacturing process, such components that will have acceptable strength properties from the point of view of a given application. These properties are indirectly determined by three key characteristics: the level of surface residual stress, the roughness of the component and its porosity. Currently, the efforts of many research groups are focused on the problem of optimizing the parameters of incremental manufacturing so as to achieve the appropriate level of compressive residual stress, the lowest possible porosity and the lowest possible roughness of parts obtained by 3D methods. It is now recognized that determining the level of these three parameters is potentially possible using experimental X-ray diffraction methods. The use of this type of radiation, admittedly, is only used to characterize the surface layer of elements, but its undoubted advantage is its easy availability and relatively low cost compared to experiments carried out using synchrotron or neutron radiation.

Źródło:

Fatigue of Aircraft Structures; 2021, 13; 72--80
2081-7738
2300-7591

Pojawia się w:

Fatigue of Aircraft Structures

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 77.

Tytuł:

The Application of the Mechanochemical Synthesis for the Preparation of Advanced Ceramics Based on Barium Titanate

Autorzy:

Garbarz-Glos, B.
Bąk, W.
Budziak, A.
Dulian, P.
Lisińska-Czekaj, A.
Czekaj, D.

Powiązania:

https://bibliotekanauki.pl/articles/351521.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

BaTiO3
mechanochemical synthesis
X-ray methods
dielectric properties

Opis:

In the present study, the lead-free BaTi_1-x Zr_x O₃ (for x = 0, 0.05 and 0.15) ceramics were prepared by High-Energy Ball Milling and heat treatments. The performed X-ray, SEM and EDS measurements confirmed high purity, good quality and the expected quantitative composition of the obtained samples. The study of dielectric properties was performed by means of broadband dielectric spectroscopy at the frequency ranging from 0.1 Hz to 10 MHz. The obtained measurement data, analyzed in accordance with the Arrhenius formalism demonstrated the presence of relaxation type dielectric mechanisms. The impedance answer of studied ceramic materials indicated the presence of two relaxation processes: one with a dominant resistive component and the other with a small capacitive component. The observed dielectric relaxation process is temperature dependent and has a “non-Debye” character.

Źródło:

Archives of Metallurgy and Materials; 2020, 65, 4; 1391-1396
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 78.

Tytuł:

Determination of Stress Values in the Surface Layer of Inconel 718 Samples Dedicated to Fatigue Tests

Autorzy:

Gadalińska, Elżbieta
Michałowski, Andrzej
Czarnewicz, Sławomir

Powiązania:

https://bibliotekanauki.pl/articles/97839.pdf

Data publikacji:

2019

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Lotnictwa

Tematy:

turning
grinding
X-ray diffraction
stress analysis
Inconel 718

Opis:

This work deals with the problem of X-ray stress determination on the samples dedicated to fatigue tests. A number of research studies point out the fact that the processing of hard, difficult to machine materials like nickel superalloys, reveals more than one trend of residual stress versus working parameters of behaviour (Lavella and Berruti, 2010). Many papers have shown that the residual stresses are dependent on a combination of a number of factors. When the above is taken into account simultaneously with the requirements of the internal General Electric specification for the fatigue tests samples preparation (Metallic test specimen preparation, low stress, 2017) the problem of turning and grinding parameters gathers significance. It is well known that the quality of the surface layer, produced during machining, is of vital importance for the fatigue life specially for the components of aircraft produced form nickel superalloys e.g. Inconel 718 (Kortabarri et al., 2011). That is why the surface layer’s properties are described in detail by the standards. The aim of the work is to determine one of the most influential features from the point of view of fatigue life, i.e. the stress state on the surface layer with one non-destructive method - the diffraction analysis.

Źródło:

Fatigue of Aircraft Structures; 2019, 11; 78-86
2081-7738
2300-7591

Pojawia się w:

Fatigue of Aircraft Structures

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 79.

Tytuł:

X-Ray Topography of the Subsurface Crystal Layers in the Skew Asymmetric Reflection Geometry

Autorzy:

Świątek, Z.
Fodchuk, I.

Powiązania:

https://bibliotekanauki.pl/articles/356405.pdf

Data publikacji:

2016

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

x-ray topography
subsurface crystal layers
asymmetric reflection geometry

Opis:

The technique of X ray topography with the asymmetric reflection geometry of X-ray diffraction presented in this paper as useful tool for structural characterization of materials, particularly, epitaxial thin films and semiconductor multi-layered crystal systems used for the optoelectronic devices. New possibilities of this technique for a layer-by-layer visualization of structural changes in the subsurface crystal layers are demonstrated for semiconductors after various types of surface treatment, such as chemical etching, laser irradiation and ion implantation.

Źródło:

Archives of Metallurgy and Materials; 2016, 61, 4; 1931-1938
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 80.

Tytuł:

Structure, physical properties and fractal character of surface topography of CVD coatings

Autorzy:

Kwaśny, W.

Powiązania:

https://bibliotekanauki.pl/articles/100107.pdf

Data publikacji:

2011

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

CVD coatings
fractal geometry
multifractal geometry
X-ray analysis

Opis:

The aim of the presented study is to establish a methodology elaboration, giving a possibility to predict properties of coatings reached in CVD process on tool materials, based on fractal quantities describing their surface. Coatings' topography and its structure which has an impact on a shape of analysed objects' surface were characterised in a comprehensive way. Influence of a type of process and conditions of deposition over structure and shape of topography as well as mechanical and operational properties of the acquired coatings were determined.

Źródło:

Journal of Machine Engineering; 2011, 11, No. 1-2; 134-151
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 81.

Tytuł:

The Structure and Magnetocaloric Effect of MnCoGe Alloy Modified by Nb

Autorzy:

Kutynia, Karolina
Gębara, Piotr
Przybył, Anna

Powiązania:

https://bibliotekanauki.pl/articles/2125529.pdf

Data publikacji:

2022

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

magnetocaloric effect
Heusler alloys
X-ray diffraction
magnetic measurement

Opis:

The aim of this work was to investigate the effect of partial substitution of Mn by Nb on structure and thermomagnetic properties in the (Mn, Nb)-Co-Ge alloy. The master alloys were prepared by arc-melting in an arc furnace with high purity of constituent elements under a low pressure of Ar. The prepared specimens were studied in as-cast state. The X-ray was performed by BRUKER D8 Advance diffractrometer with Cu Kα radiation. The analysis of the XRD pattern revealed coexistence of two orthorhombic phases with different lattice constants. The analysis of the temperature dependence of magnetizaton confirmed the XRD results and showed that produced material manifested two magnetic phase transitions corresponding to detected phases. The values of the Curie temperature were 275 and 325 K. The values of magnetic entropy change ∆SM equaled 3.30 and 2.13 J/(kg K), respectively for recognized phases. Biphase structure of produced material allowed to reach relatively high refigeration capacity 307 J/(kg). Moreover, the analysis of field dependences of magnetic entropy change (∆SM = CBn) allowed to construct temperature dependence of exponent n. The analysis of elaborated n vs. T curve confirmed biphasic structure of produced material.

Źródło:

Archives of Metallurgy and Materials; 2022, 67, 3; 879--883
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 82.

Tytuł:

Correlation between Microstructure and Electrochemical Properties of Al-Si Alloys

Autorzy:

Minciuna, Mirabela G.
Vizureanu, Petrica
Jeż, Bartłomiej
Sandu, Andrei Victor
Nabiałek, Marcin
Achitei, Dragos C.

Powiązania:

https://bibliotekanauki.pl/articles/2134104.pdf

Data publikacji:

2022

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

aluminium alloys
microstructure
X-ray diffraction
corrosion
Evans diagrams

Opis:

The composition and structural modification of aluminium alloys influence their strength, tribological properties and structural stability. The phase composition of the structure as well as the characteristics of the elementary cell of each identified phase was established by X-ray diffraction, and the main objective was to determine the compositional phases, microstructure and microcomposition of the alloy. Based on the cyclic voltammograms it can be said that on the OCP interval (+1.5 V… -1.1 V), after the breakthrough potential is an intensification of the anodic process by the pronounced increase of the current density, in these conditions the Al-Si alloy has low values which means that it has a better corrosion resistance.

Źródło:

Archives of Metallurgy and Materials; 2022, 67, 3; 1067--1070
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 83.

Tytuł:

Laboratory methods for testing the performance of pyrotechnic delay elements

Autorzy:

Warchol, R.
Nita, M.

Powiązania:

https://bibliotekanauki.pl/articles/30146954.pdf

Data publikacji:

2018

Wydawca:

Akademia Wojsk Lądowych imienia generała Tadeusza Kościuszki

Tematy:

pyrotechnic delay element
ammunition
X-ray radiography
thermal imaging

Opis:

Pyrotechnic delay elements owing to their simple structure and reliability are very often used as part of the design of ammunition. Their basic task consists in generating a specified delay between the respective actions of two elements/systems, required to ensure the safe and reliable work of ammunition. The paper presents laboratory methods employed for testing the performance of pyrotechnic delay elements (PDEs) used in means of combat. The introductory part describes pyrotechnical delay elements and the task fulfilled by them in ammunition. The next part discusses performance parameters of pyrotechnic delay elements, decisive for their proper operation, and factors influencing such operation. In its main part the article presents the standard defining the laboratory methods to be employed for testing pyrotechnic delay elements. According to the above-mentioned standard, the laboratory methods of testing pyrotechnic delay elements can be divided into tests in the open and closed systems. Further, the paper discusses both types of test systems. Taking account of a wide thematic scope of the discussed issue, this article focuses mainly on presenting new methods of testing pyrotechnic delay elements, which have not been mentioned in the standard. Provided examples of tests of pyrotechnic delay elements have been taken from the Polish and foreign literature. Two methods of testing pyrotechnic delay elements are worth paying special attention, one making use of a thermal imaging camera, and the other relying on Roentgen radiation.

Źródło:

Scientific Journal of the Military University of Land Forces; 2018, 50, 4(190); 101-115
2544-7122
2545-0719

Pojawia się w:

Scientific Journal of the Military University of Land Forces

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 84.

Tytuł:

Hard Inclusions in Armature Brass

Autorzy:

Romankiewicz, Remigiusz
Romankiewicz, Ferdynand

Powiązania:

https://bibliotekanauki.pl/articles/106957.pdf

Data publikacji:

2019

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

armature brass
hard inclusions
chemical composition
X-ray microanalysis

Opis:

The influence of the chemical composition of selected armature brasses on the formation of hard inclusions was investigated. In metallographic studies using optical microscopy and scanning electron microscopy with X-ray microanalysis (EDS), it was found that hard inclusions attain sizes ranging from several hundred nanometers to several micrometers. Investigations of samples that were taken from metallurgical pigs of armature brass of various chemical compositions have shown that the contribution of components such as iron and silicon have a decisive influence on the formation of hard inclusions. These components have a dominant share in hard inclusions (60–76 wt.% Fe and 10.6–17.4 wt.% Si). In much smaller quantities there are also elements such as manganese, phosphorus, nickel and chromium. The chemical composition of hard inclusions varies. The number and size of hard inclusions depends on the contribution of iron and silicon brass. In the brass sample with 0.31 wt.% Fe and 0.08 wt.% Si, 1183 inclusions per square millimeters were identified, while in the brass sample with 0.21 wt.% Fe and 0.11 wt.% Si the amount of hard inclusions was reduced to 933 inclusions per square millimeters. In the brass sample with reduced iron content up to 0.08 wt.% and silicon up to 0.006 wt.%, no hard inclusions were identified.

Źródło:

Journal of Casting & Materials Engineering; 2019, 3, 3; 51-56
2543-9901

Pojawia się w:

Journal of Casting & Materials Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 85.

Tytuł:

Structural features of gem minerals and identification and evaluation

Autorzy:

An, Mei
Zhou, Yongzhe
Liu, Yangjie

Powiązania:

https://bibliotekanauki.pl/articles/89024.pdf

Data publikacji:

2019

Wydawca:

Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa

Tematy:

plum blossom jade
emerald
infrared spectroscopy
X-ray diffraction

Opis:

Gem has long been chased because of its cultural and historical significance and beauty, and the identification and evaluation of its structural features have also been paid attention to. Plum blossom jade and emerald were identified and analyzed by means of the conventional detection method, infrared spectroscopy and X-ray powder diffraction analysis. The results showed that plum blossom jade with black and brown background and red, white and brown amygdaloid body spots had a diameter of 1–10 mm, a relative density of 2.69–2.75 g/cm³ and a refractive index of 1.52–1.55, and its minerals contained water molecules, quartz, low albite, anorthoclase and andesite. It was observed that emerald was green, greasy, glassy, transparent, with a relative density of 2.66–2.78 g/cm³ and 1.58 refractive index, and its minerals contained water molecules; there were two kinds of arrangement in crystal channels. The main mineral component of emerald was beryl, and its purity was high.

Źródło:

Mining Science; 2019, 26; 109-122
2300-9586
2353-5423

Pojawia się w:

Mining Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 86.

Tytuł:

TiO2 thin films grown on SiO2–Si(111) by the reactive evaporation method

Autorzy:

Grodzicki, M
Wasielewski, R
Mazur, P
Zuber, S
Ciszewski, A

Powiązania:

https://bibliotekanauki.pl/articles/173459.pdf

Data publikacji:

2013

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

titanium oxide
wettability
X-ray photoelectron spectroscopy
UV radiation

Opis:

TiO2 thin films were grown on silicon substrates using an electron-beam evaporator. Grainy TiO was used as the evaporation material. Temperature substrate during TiO2 growth was relatively low (about 150 °C), what is important for many optoelectronic devices and multilayers mirrors. High vacuum condition allows to maintain clean surfaces substrates before and during oxide growth. The morphology of titanium oxide thin films was ex situ investigated using atomic force microscopy operating in contact mode, X-ray photoelectron spectroscopy, X-ray powder diffractometry, and by means of a contact angle analyzer. The influence of annealing treatment and exposure to UV–VIS radiation on the morphology has been also discussed.

Źródło:

Optica Applicata; 2013, 43, 1; 99-107
0078-5466
1899-7015

Pojawia się w:

Optica Applicata

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 87.

Tytuł:

Osmotic dehydration and freezing as a suitable pretreatment in the process of vacuum drying kiwiberry: drying kinetics and microstructural changes

Autorzy:

Bialik, M.
Wiktor, A.
Witrowa-Rajchert, D.
Samborska, K.
Gondek, E.
Findura, P.

Powiązania:

https://bibliotekanauki.pl/articles/2082900.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Instytut Agrofizyki PAN

Tematy:

Actinidia arguta
X-ray microtomography
mathematical modelling
drying kinetics

Opis:

This study investigated the effects of osmotic dehydration and freezing on the kinetics and microstructure of vacuum-dried kiwiberry. Both fresh and previously frozen fruit were dehydrated in sucrose, maltitol and xylitol. Freezing and osmotic dehydration were selected as possible ways to improve the drying kinetics and positively influence the taste of the fruit. This experiment focused on the analysis of microstructural changes induced by applied processing methods using the X-ray microtomography technique. The results showed that the fruit pretreated in sucrose suffered the least structural damage as expressed by the largest condensation of small pores and thin cell walls. Freezing and xylitol resulted in the accumulation of larger pores and thicker walls. The most rapid drying time of 678-688 min was observed for unfrozen samples, dehydrated in sucrose and maltitol. Freezing slowed down the drying process, by 60-100 min, in comparison to the unfrozen samples. The applied mathematical models proved useful in predicting the kinetics of the drying process. The equation proposed by Midilli et al. provided the best fit for predicting the kinetics of the process.

Źródło:

International Agrophysics; 2020, 34, 2; 265-272
0236-8722

Pojawia się w:

International Agrophysics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 88.

Tytuł:

Mineralogical studies of the Maastrichtian Gerinya Claystone of the Patti Formation, southern Bida Basin, Nigeria: Implication for industrial application

Autorzy:

Oyetade, Oluwaseye P.
Konwea, Charles I.
Ojo, Olusola J.
Odesanmi, Tayelolu M.

Powiązania:

https://bibliotekanauki.pl/articles/2086565.pdf

Data publikacji:

2021

Wydawca:

Polskie Towarzystwo Mineralogiczne

Tematy:

Gerinya
X-Ray Diffraction (XRD)
diffractograms
claystone
Patti Formation

Opis:

The mineralogical compositions of the Gerinya claystone, Patti Formation, Southern Bida Basin, Nigeria, were investigated to infer their sedimentological process and industrial application. Mineralogical analysis of the claystone was carried out using the X-ray diffraction (XRD) method. The diffractogram peaks aided the identification of the clay and non-clay minerals in the study area. The XRD showed kaolinite as the major clay mineral with compositions ranging from 10.8 - 67.6 wt%. The non-clay minerals were quartz, anatase, diopside, goethite, hematite, rutile, muscovite and microcline. Among the non-clay minerals, quartz had the highest percentage mineralogical composition of 21.2 to 83.4 wt%. The mineral assemblage is typical of a hot and humid climate where chemical alteration and hydrolysis of silicate minerals are severe. The sediments are of mafic and felsic crystalline rocks origin. The sediments are of low energy floodplain/interchannel depositional environment. The Gerinya claystone vary from low to high porosity and very low to low permeability. The claystone can be used as clay liners and as raw material for ceramic production. The application of the claystones in fertiliser production will require some processing. The claystone can be used for haemorrhage control in the pharmacological/medical sector. Although, the ingestion of the claystones could lead to dental damage and possible perforation of the sigmoid colon in the gastrointestinal tract.

Źródło:

Mineralogia; 2021, 52, 1; 10--18
1899-8291
1899-8526

Pojawia się w:

Mineralogia

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 89.

Tytuł:

Comparison of lung ultrasound and chest X-ray findings in children with bronchiolitis
Porównanie obrazu USG i RTG klatki piersiowej u dzieci z zapaleniem oskrzelików

Autorzy:

Jaszczołt, Sławomir
Polewczyk, Tomasz
Dołęga-Kozierowska, Marta
Woźniak, Mariusz
Doniec, Zbigniew

Powiązania:

https://bibliotekanauki.pl/articles/1032318.pdf

Data publikacji:

2018

Wydawca:

Medical Communications

Tematy:

bronchiolitis
chest X-ray
lung ultrasound
respiratory syncytial virus

Opis:

Aim: Respiratory syncytial virus is the main pathogen responsible for bronchiolitis. Usually, there is no indication to perform diagnostic imaging or run laboratory tests in patients with bronchiolitis since the diagnosis is based on the clinical presentation. Chest radiogram can be useful in severe cases. So far, lung ultrasound has not been considered as an alternative in guidelines for imaging diagnosis of bronchiolitis. The aim of the study was to compare lung ultrasound and chest X-ray findings in children with bronchiolitis. Material and methods: In our study we retrospectively compared diagnostic imaging findings in children with confirmed respiratory syncytial virus infection. The study included 23 children aged 2 weeks to 24 months and 3 children older than 24 months. Results: Chest X-ray showed lesions in only 4 cases, whereas ultrasound abnormalities were found in 21 patients. Pathologies revealed by chest Xray were the same for all 4 cases and consisted of an enlarged hilus and peribronchial cuffing. Sonographic lesions included inflammatory consolidations larger than 10 mm in 11 patients, small consolidations (<10 mm diameter) in 8 patients, interstitial syndromes in 6 patients, and alveolar-interstitial syndromes in 11 patients. A small amount of pleural effusion was detected in 3 patients. Conclusions: Considering safety, short time of examination, high sensitivity in finding pleural effusion, small consolidations and signs of interstitial infiltrations, transthoracic lung ultrasound may be useful in the diagnosis of bronchiolitis.
Cel badania: Wirus respiratory syncytial jest głównym patogenem powodującym ostre zapalenie oskrzelików. Zwykle u pacjentów z zapaleniem oskrzelików nie ma wskazań do wykonywania badań obrazowych i laboratoryjnych, a rozpoznanie opiera się na obrazie klinicznym. W cięższych przypadkach przydatne może być badanie rentgenowskie klatki piersiowej. Dotychczas nie uwzględniono badania ultrasonograficznego płuc w wytycznych dotyczących diagnostyki tego schorzenia. W naszej pracy porównaliśmy wyniki badań obrazowych: ultrasonograficznych płuc i rentgenowskich klatki piersiowej u dzieci z zapaleniem oskrzelików. Materiały i metody: Retrospektywnie porównano wyniki przezklatkowego badania ultrasonograficznego płuc i zdjęcia rentgenowskie klatki piersiowej u dzieci z potwierdzonym zakażeniem respiratory syncytial virus. Do badania włączono 23 dzieci w wieku od 2 tygodni do 24 miesięcy i 3 dzieci w wieku powyżej 24 miesięcy. Wyniki: Zmiany patologiczne w badaniu rentgenowskim klatki piersiowej uwidoczniono w czterech przypadkach, podczas gdy w badaniu ultrasonograficznym zmiany stwierdzono u 21 pacjentów. Na zdjęciu rentgenowskim klatki piersiowej u wszystkich czterech pacjentów opisano poszerzenie wnęk i zagęszczenia okołooskrzelowe. Zmiany stwierdzone w obrazie ultrasonograficznym obejmowały: konsolidacje zapalne większe niż 10 mm u 11 pacjentów, małe konsolidacje (<10 mm średnicy) u 8 pacjentów, zespoły śródmiąższowe u 6 pacjentów, zespoły śródmiąższowo-pęcherzykowe u 11 pacjentów. W 3 przypadkach stwierdzono niewielką ilość płynu wysiękowego w opłucnej. Wnioski: Z uwagi na bezpieczeństwo, krótki czas badania oraz wysoką czułość w obrazowaniu wysięku opłucnowego, małych konsolidacji i zmian śródmiąższowych przezklatkowe badanie ultrasonograficzne płuc może być użyteczne w diagnostyce zapalenia oskrzelików.

Źródło:

Journal of Ultrasonography; 2018, 18, 74; 193-197
2451-070X

Pojawia się w:

Journal of Ultrasonography

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 90.

Tytuł:

Diagnostics of the plasma parameters based on the K X-ray line positions for various 4d and 4f metals

Autorzy:

Szymańska, E.
Syrocki, Ł.
Słabkowska, K.
Polasik, M.

Powiązania:

https://bibliotekanauki.pl/articles/148868.pdf

Data publikacji:

2016

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

plasma diagnostic
outer-shell ionization
K X-ray lines

Opis:

This paper shows the theoretical predictions of the outer-shell ionization effect on the positions of Kα1,2, Kβ1,3, and Kβ2 X-ray lines for some 4d-transition metals (molybdenum and palladium) and 4f rare-earth elements (dysprosium and ytterbium). The ionization energy shifts have been evaluated using the multiconfiguration Dirac-Fock method, containing Breit interaction and quantum electrodynamic (QED) corrections. The presented results are important for obtaining the information about some parameters of plasma generated by different sources, especially by pulsed power machine and short-pulse lasers.

Źródło:

Nukleonika; 2016, 61, 4; 437-441
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 91.

Tytuł:

Method for Filling and Sharpening False Colour Layers of Dual Energy X-ray Images

Autorzy:

Dmitruk, K.
Mazur, M.
Denkowski, M.
Mikołajczak, P.

Powiązania:

https://bibliotekanauki.pl/articles/227318.pdf

Data publikacji:

2016

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

X-ray imaging
image processing
false colour
object detection

Opis:

An X-ray scanning and image processing have a vast range of applications in the security. An image of a content of some package being passed for example to an airplane or to the court house may help to figure out if there are any dangerous objects inside that package and to avoid possible threatening situation. As the raw X-ray images are not always easy to analyze and interpret, some image processing methods like an object detection, a frequency resolution increase or a pseudocolouring are being used. In this paper, we propose a pseudocoloring improvement over material based approach. By addition of the edge detection methods we fill and sharpen colour layers over the image, making it easier to interpret. We demonstrate the effectiveness of the methods using real data, acquired from a professional dual energy X-ray scanner.

Źródło:

International Journal of Electronics and Telecommunications; 2016, 62, 1; 49-54
2300-1933

Pojawia się w:

International Journal of Electronics and Telecommunications

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 92.

Tytuł:

Effect of crystallization on the electrical resistance and structure of amorphous Fe-Co-Cr-B-Si alloys
Wpływ krystalizacji na oporność elektryczną i strukturę amorficznych stopów Fe-Co-Cr-B-Si

Autorzy:

Solomon, H.
Solomon, N.

Powiązania:

https://bibliotekanauki.pl/articles/355840.pdf

Data publikacji:

2012

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

amorphous alloys
X-ray diffraction
electric resistivity
microhardness
annealing

Opis:

The goal of this paper is to present the influence of temperature variation and iron substitution with Co on the structure and electrical properties of amorphous Fe75-xCoxCr1B7Si17 alloys (where x=1, 4, 7, and 10 at.%), obtained by melt-spinning technique. The electrical resistivity of the samples was measured by using a usual four-probe method from -160°C to 750°C. The electrical resistivity was also measured at room temperature for the amorphous Fe75-xCoxCr1B7Si17 ribbons annealed at various temperatures for different holding time. The annealed samples were also investigated by Vickers microhardness test. The amorphous structure of tested materials was examined by X-ray diffraction (XRD), Mőossbauer spectroscopy, differential scanning calorimetry (DSC) and scanning electron microscopy (SEM) methods. Experimental results confirmed the utility of applied investigation methods and the influence of the Co content and annealing process on the crystallization, structure and electrical properties of examined amorphous alloys.
Celem niniejszego artykułu jest przedstawienie wpływu zmian temperatury i zastąpienia Fe przez Co na strukturę i właściwości elektryczne amorficznych stopów Fe75-xCoxCr1B7Si17 (gdzie x=1, 4, 7, 10 at.%) odlewanych na wirującym dysku. Oporność elektryczna próbek była mierzona metoda czteropunktowa w zakresie od -160°C to 750°C. Oporność elektryczna zmierzono także w temperaturze pokojowej dla amorficznych taśm Fe75-xCoxCr1B7Si17 wyżarzonych w różnych temperaturach dla różnych czasów. Wyżarzone próbki poddano również badaniom mikrotwardości Vickersa. Amorficzna strukturę badanych materiałów badano przy użyciu dyfrakcji rentgenowskiej (XRD), spektroskopii Mőossbauera, różnicowej kalorymetrii skaningowej (DSC) oraz skaningowej mikroskopii elektronowej (SEM). Wyniki eksperymentu potwierdziły przydatność zastosowanych metod badawczych oraz wpływ zawartości Co i wyżarzania na proces krystalizacji, strukturę i własciwości elektryczne badanych stopów amorficznych.

Źródło:

Archives of Metallurgy and Materials; 2012, 57, 4; 1031-1039
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 93.

Tytuł:

Surface Modification of Self-Consolidated Microporous Ti Implant Compacts Fabricated by Electro-Discharge-Sintering in Air

Autorzy:

Jo, Y. J.
Yoon, Y. H.
Kim, Y. H.
Chang, S. Y.
Kim, J. Y.
Lee, Y. K.
Van Tyne, C. J.
Lee, W. H.

Powiązania:

https://bibliotekanauki.pl/articles/356790.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

titanium
implant
porous
sintering
X-ray photoelectron spectroscopy (XPS)

Opis:

A single pulse of 0.75-2.0 kJ/0.7g of atomized spherical Ti powders from 300 mF capacitor was applied to produce a microporous Ti implant compact by electro-discharge-sintering (EDS). A solid core in the middle of the compact surrounded by a microporous layer was found. X-ray photoelectron spectroscopy was employed to study the surface characteristics of the EDS Ti compact and it revealed that Ti, C and O were the main constituents on the surface with a smaller amount of N. The surface was lightly oxidized and was primarily in the form of TiO₂ resulting from the air oxidation during EDS processing. The lightly oxidized surface of the EDS compact also exhibited Ti nitrides such as TiN and TiON, which revealed that the reaction between air constituents and the Ti powders even in times as short as 128 msec.

Źródło:

Archives of Metallurgy and Materials; 2017, 62, 2B; 1287-1291
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 94.

Tytuł:

Stabilizing of Z-pinch and Plasma Focus discharges due to thick wires

Autorzy:

Kubeš, P.
Kravárik, J.
Paduch, M.
Tomaszewski, K.
Scholz, M.
Karpinski, L.
Szydlowski, A.
Bakshaev, Y.
Blinov, P.
Chernenko, A. S.
Gordeev, E. M.
Dan’ko, S. A.
Korolev, V. D.
Shashkov, A.
Tumanov, V. I.
Romanova, V.
Klír, D.

Powiązania:

https://bibliotekanauki.pl/articles/146991.pdf

Data publikacji:

2001

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

plasma focus
X-ray source
XUV spectroscopy
Z-pinch

Opis:

This paper presents the results of the diagnostics observing the impact of the plasma sheath imploded in megaamper Z-pinch or plasma focus devices onto the Al or C wires of 30-300 mi m in diameter fixed in the center axis. The discharges were operated with a maximum current of 1.5-3 MA at two devices, PF 1000 at IPFLM in Warsaw, and Stand 300 at RRC Kurchatov Institute in Moscow. At the plasma impact the 10-50 ns XUV pulse was emitted in K-shell lines from the ring or helical-like forms on the surface of the wire corona. The scenario of the production of the non-equilibrium intensities of the C and Al H-like and He-like lines is discussed considering fast transformation of magnetic field, electron beams acceleration, total ionization of the ions and fast recombination in dense and magnetized wire corona.

Źródło:

Nukleonika; 2001, 46, 1; 5-7
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 95.

Tytuł:

Limitations of thermoluminescent dosimeters in soft X-ray diagnostics of pulsed plasma

Autorzy:

Krása, J.
Fárníková, M.
Juha, L.
Cejnarová, A.

Powiązania:

https://bibliotekanauki.pl/articles/147287.pdf

Data publikacji:

2001

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

dosimetry of photons
thermoluminescent dosimeters
X-ray plasma diagnostics

Opis:

Responses of thermoluminescent dosimeters (TLDs) of CaF2:Dy, CaF2:Mn, and LiF:Mg,Cu,P to the deposited energy of monochromatic 1.75–3.5 keV radiation were measured with respect to an increase in the local dose due to the attenuation length that was much shorter than the TLD thickness. The responses of TLDs to X-ray emission from the laserproduced aluminium plasma were found to be independent of the dose rate within a wide range.

Źródło:

Nukleonika; 2001, 46, suppl. 1; 49-51
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 96.

Tytuł:

Improving heat aging and mechanical properties of fluoroelastomer using carbon nanotubes

Autorzy:

Heidarian, J.
Hassan, A.

Powiązania:

https://bibliotekanauki.pl/articles/949397.pdf

Data publikacji:

2017

Wydawca:

Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie

Tematy:

fluoroelastomers
crystallization
tension test
X-ray diffraction topography
aging

Opis:

Carbon nanotube (CNT)-, carbon black (CB)-filled fluoroelastomer (FE) and unfilled-FE compounds were prepared (CNT/FE, CB/FE and FE). The compounds were subjected to heat air aging and characterized by tensile test and X-Ray Diffraction (XRD) analysis. Results show that CNT improved tensile properties of FE before and after aging. All samples show stress induced crystallization (SIC) during tension. XRD results show that under all conditions, the crystals were in the form of γ-phase. For both aged and un-aged specimens, the degree of crystallinity (X_c) is low. After tensile stretching, X_c  of un-aged specimens increases tremendously, with larger crystal size. Under the same conditions, the order of elongation at break (EL) was FE > CB/FE > CNT/FE. Normal modulus (NM) and tangent modulus (TM) at the same conditions was in the order of CNT/FE > CB/FE > FE. Tensile strength had the order of CNT/FE > CB/FE > FE.

Źródło:

Polish Journal of Chemical Technology; 2017, 19, 1; 132-142
1509-8117
1899-4741

Pojawia się w:

Polish Journal of Chemical Technology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 97.

Tytuł:

Utilization of cement and other additives for solidification/stabilization of soil contaminated simultaneously with Cd2+ and Pb2+ ions

Autorzy:

Xi, Y.
Wang, H.
Guo, L.
Zhang, M.

Powiązania:

https://bibliotekanauki.pl/articles/208172.pdf

Data publikacji:

2018

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

cement
soil pollution
X-ray diffraction
dyfrakcja rentgenowska
zanieczyszczenie gleby

Opis:

Various additives, including cement, quicklime, fly ash, montmorillonite, sepiolite and their proportions were employed to stabilize/solidify artificially prepared soils contaminated simultaneously with two kinds of ions such as Cd²⁺ and Pb²⁺. The unconfined compressive strength of the stabilized soils was measured to estimate the possibility of recycling. The efficiency of Cd²⁺ and Pb²⁺ immobilization in contaminated soils was also evaluated using the US EPA TCLP toxicity test. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to elucidate the mechanisms responsible for the immobilization of heavy metals. The experimental results demonstrate that in terms of soils simultaneously polluted with Cd²⁺ and Pb²⁺ ions, the curing effect of fly ash is better than that of montmorillonite and sepiolite. When Cd²⁺ and Pb²⁺ coexist in soil specimens, the curing is more difficult than for Cd2+ or Pb2+ alone, which is antagonistic mechanism. Also, the leaching concentration of Cd²⁺ and Pb²⁺ gradually decreases upon increasing pH when pH < 8. For pH ≥ 8, the leaching concentration of Cd²⁺ and Pb²⁺ reached a minimum. Besides, the results of XRD and SEM are in agreement with those of the strength and leaching tests.

Źródło:

Environment Protection Engineering; 2018, 44, 1; 61-73
0324-8828

Pojawia się w:

Environment Protection Engineering

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 98.

Tytuł:

Otrzymywanie i właściwości modyfikowanych nanoporowatych adorbentów krzemionkowych
Synthesis and properties of modified nanoporous siliceous adsorbents

Autorzy:

Choma, J.
Jaroniec, M.

Powiązania:

https://bibliotekanauki.pl/articles/236528.pdf

Data publikacji:

2003

Wydawca:

Polskie Zrzeszenie Inżynierów i Techników Sanitarnych

Tematy:

modified ordered mesoporous silica
nitrogen adsorption
X-ray diffraction
thermogravimetry

Opis:

Otrzymano uporządkowane, nanoporowate adsorbenty krzemionkowe (MCM-41) z merkaptopropylowymi oraz aminopropylowymi grupami. W procesie syntezy tych materiałów wykorzystano metodę hydrotermiczną z zastosowaniem bromku cetylotrimetyloamoniowego, jako surfaktantu, i tertaetoksysilanu, jako źródła krzemionki. Po wytrąceniu się białego osadu uporządkowanego materiału krzemionkowego dodawano 3-merkaptopropylotrietoksysilan lub 3-aminopropylotrietoksysilan, jako modyfikatory. Właściwości tak otrzymanych modyfikowanych merkaptopropylowych i aminopropylowych materiałów porównano z właściwościami niemodyfikowanego MCM-41. Otrzymane materiały badano za pomocą metody rozpraszania promieniowania rentgenowskiego (XRD), wysokorozdzielczej termograwimetrii (HRTG) i niskotemperaturowej (77 K) adsorpcji azotu. Stwierdzono, że w wyniku tak przeprowadzonej syntezy udało się wprowadzić około 12% wag. grup merkaptopropylowych oraz około 6% wag. grup aminopropylowych. Tak otrzymane modyfikowane materiały charakteryzują się uporządkowaną strukturą mezoporowatą o małej dyspersji porów a ich średnica wynosi około 3,6 - 3,8 nm. Inne parametry struktury mezoporowatej takie jak całkowita powierzchnia właściwa Sc, powierzchnia właściwa SBET, objętości pierwotnych mezoporów Vme i całkowita objętość porów Vc są wysokie i niewiele mniejsze od odpowiednich parametrów dla niemodyfikowanego MCM-41 C16. Badane modyfikowane adsorbenty MCM-41 mogą być wykorzystywane do usuwania jonów metali ciężkich z wody.
Ordered nanoporous siliceous adsorbents (MCM-41) with mercaptopropyl and aminopropyl groups were synthesized. Cetyltrimethylammonium bromide as the templating surfactant and tetraethoxysilane as the silica source were used to synthesize these materials hydrothermally. After precipitation of a white powder of ordered silica, 3-mercaptopropyltriethoxysilane and 3-aminopropyltriethoxysiliane were added as modifiers. The properties of mercaptopropyl- and aminopropyl-modified materials were compared with those for the unmodified MCM-41. The resulting materials were studied by powder X-ray diffraction (XRD), high resolution thermogravimetry (HRTG) and low temperature (77 K) nitrogen adsorption. With the method of synthesis used we were able to introduce 12% of mercaptopropyl groups and 6% of aminopropyl groups. The resulting modified materials possess on ordered mesoporous structure of a small dispersion of pores, with a pore diameter ranging between 3.6 and 3.8 nm. The other structural parameters such as the total specific surface area (Sc), the BET surface area (SBET), the volume of primary mesopores (Vme) and the total pore volume (Vc) are high and not very much smaller than the corresponding parameters for the unmodified MCM-41. The modified MCM-41 adsorbents can be used for the removal of heavy metal ions from water.

Źródło:

Ochrona Środowiska; 2003, R. 25, nr 1, 1; 3-8
1230-6169

Pojawia się w:

Ochrona Środowiska

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 99.

Tytuł:

Metody badania porowatości odlewanych ciśnieniowo wyrobów ze stopu magnezu AM50
Porosity testing methods of magnesium alloy AM50 made by casting pressure

Autorzy:

Sozańska, L.
Mazurkiewicz, J.

Powiązania:

https://bibliotekanauki.pl/articles/134841.pdf

Data publikacji:

2016

Wydawca:

ADVSEO

Tematy:

magnesium alloys
pressure casting
porosity
acoustic microscopy
X-ray tomography

Opis:

There is an increasing interest in casting pressure elements in the automotive and household industry. Mechanical properties, implementation precision and quality play major role here. Unfortunately, this manufacturing technology is accompanied with disadvantageous features of the material structure as porosity, which must be controlled during production. On the basis of comparative studies of three selected research methods the most optimal research method for this group of products and materials was selected. It is a technique based on acoustic microscopy which, allows for the research of large components in the X and Y axes and a relatively high Z-axis. The research enables an analysis of all components without necessity of cutting a product into smaller elements subjected to separate analysis.

Źródło:

Technical Issues; 2016, 4; 89-95
2392-3954

Pojawia się w:

Technical Issues

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 100.

Tytuł:

Simulation of computed tomography (CT) images using a Monte Carlo approach

Autorzy:

Wysocka-Rabin, A. M.
Qamhiyeh, S.
Jäkel, O.

Powiązania:

https://bibliotekanauki.pl/articles/147601.pdf

Data publikacji:

2011

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

X-ray tomography
Monte Carlo (MC) method
treatment planning
hadrontherapy

Opis:

Heavy ion treatment planning uses an empirical scanner-dependent calibration relation between computed tomography (CT) numbers and ion range. Any deviation in the values of CT numbers will cause a drift in the calibration curve of the CT scanner, which can reduce the accuracy of treatment beam delivery. To reduce uncertainty in the empirical estimation of CT numbers, we developed a simulation that takes into consideration the geometry, composition, and physical process that underlie their measurement. This approach uses Monte Carlo (MC) simulations, followed by a simple filtered back-projection reconstruction. The MC code used is BEAMnrc/EGSnrc. With the manufacturer’s permission, we simulated the components (X-ray tube, associated filters and beam shapers) of a Siemens Emotion CT. We then generated an initial beam shape and spectra, and performed further simulations using the phantom with substitutes. We analyzed the resulting phase space file to calculate projections, taking into account the energy response of the CT detectors. Then, we applied a simple reconstruction algorithm to the calculated projections in order to receive the CT image.

Źródło:

Nukleonika; 2011, 56, 4; 299-304
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

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