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Tytuł:
Simultaneous Analysis of Several Mössbauer Spectra
Autorzy:
Cieslak, J.
Dubiel, S.
Powiązania:
https://bibliotekanauki.pl/articles/1811902.pdf
Data publikacji:
2008-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
76.80.+y
07.05.Kf
02.60.-x
Opis:
A method based on a simultaneous fit of several Mössbauer spectra from a series of measurements is compared with the one based on an independent analysis of each spectrum. Three different algorithms, namely a least squares iteration procedure, a Gauss-Seidel function minimization and a genetic algorithm based method are applied and discussed. The conclusions drawn are supported by a simulated and a measured spectra analysis.
Źródło:
Acta Physica Polonica A; 2008, 114, 6; 1691-1705
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Quadrupole Interaction on $\text{}^{57}$Fe Mössbauer Spectra for Samples with Charge- and Spin-Density Waves
Autorzy:
Cieślak, J.
Dubiel, S. M.
Powiązania:
https://bibliotekanauki.pl/articles/1964225.pdf
Data publikacji:
1997-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
76.80.+y
75.30.Fv
75.50.Ee
Opis:
The influence of the quadrupole interaction on the shape of $\text{}^{57}$Fe Mössbauer spectra expected for samples with charge-density waves andor spindensity waves is investigated. It is shown, by model calculations, that both for the commensurate and for incommensurate charge-density waves andor spin-density waves the shape of $\text{}^{57}$Fe Mössbauer spectra is sensitive to the value, and for asymmetric spectra, to the sign of quadrupole interaction. This necessitates an inclusion of quadrupole interaction when analyzing the spectra recorded on samples exhibiting charge-density waves andor spin-density waves, and having a symmetry lower than cubic.
Źródło:
Acta Physica Polonica A; 1997, 91, 6; 1131-1139
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On Effect of Spin-Density Wave Parameters on Shape of $\text{}^{119}$Sn Mössbauer Spectra
Autorzy:
Cieślak, J.
Dubiel, S. M.
Powiązania:
https://bibliotekanauki.pl/articles/1943948.pdf
Data publikacji:
1995-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
76.80.+y
75.30.Fv
75.50.Ee
Opis:
Based on a simple numerical procedure the influence of various parameters characteristic of spin-density waves on the shape of $\text{}^{119}$Sn Mössbauer spectra and the related histograms of the Hyperfine field distributions is investigated.
Źródło:
Acta Physica Polonica A; 1995, 88, 6; 1143-1150
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mössbauer-Effect Study of Calciomagnetites
Autorzy:
Dubiel, S. M.
Cieślak, J.
Orewczyk, J.
Jasieńska, S.
Powiązania:
https://bibliotekanauki.pl/articles/1968864.pdf
Data publikacji:
1998-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
76.80.+y
82.80.Ej
Opis:
Ca$\text{}_{x}$Fe$\text{}_{3-x}$O$\text{}_{4}$ samples, with x ≤ 0.28 , prepared from α-Fe$\text{}_{2}$O$\text{}_{3}$ and CaO by the Bridgman method were investigated by means of $\text{}^{57}$Fe Mössbauer spectroscopy. Room temperature spectra gave evidence that the samples were multiphase, the calciomagnetite being the dominant phase with a contribution of 73% to 99%, depending on the sample. Analysis of the subspectra associated with the calciomagnetite gave evidence that Ca-ions reside on the tetrahedral (A) sites and have not random distribution. Their presence on those sites causes a reduction of the hyperfine field at Fe nuclei occupying the octahedral positions (B) by 12.3(1.0) kOe per one Ca-ion and a decrease in the average hf field, 〈H$\text{}_{B}$〉/dx, at the rate of 29 kOe/mol% for x ≤ 0.07 and of 387 kOe/mol% for larger x. In addition, a linear correlation between 〈H$\text{}_{B}$〉 and the average isomer shift, 〈I$\text{}_{B}$〉, was revealed to hold. It indicates that addition of Ca-ions into the magnetite causes a decrease in the spin-density and an increase in the charge-density at Fe nuclei occupying the B-sites.
Źródło:
Acta Physica Polonica A; 1998, 93, 3; 547-561
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza zastosowan i przyklad systemu ekspertowego w zagadnieniach suszenia i przechowywania produktow rolniczych
Autorzy:
Trajer, J
Cieslak, J W
Izdebski, W
Iwanski, C
Powiązania:
https://bibliotekanauki.pl/articles/807094.pdf
Data publikacji:
1994
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
przechowywanie
zastosowanie
suszenie
zboza
ziarno
systemy ekspertowe
doradztwo rolnicze
Opis:
W pracy przedstawiono przykład budowy prototypu systemu ekspertowego dotyczącego suszenia i przechowywania ziarna zbóż. Przeprowadzono też krótką analizę możliwości zastosowań systemów ekspertowych w doradztwie rolniczym.
An example of building prototype expert system regarding drying and storage of cereal grain was presented. Possible applications of the expert systems in agricultural advisory were briefly analysed, either.
Źródło:
Zeszyty Problemowe Postępów Nauk Rolniczych; 1994, 417; 217-222
0084-5477
Pojawia się w:
Zeszyty Problemowe Postępów Nauk Rolniczych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of ionizing radiation on vernalization, growth and development of winter wheat
Autorzy:
Czyczylo-Mysza, I.M.
Marcinska, I.
Jankowicz-Cieslak, J.
Dubert, F.
Powiązania:
https://bibliotekanauki.pl/articles/19063.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
The effects of gamma irradiation on the vernalization requirements, growth and development of winter wheat grown in a rainout shelter were studied during two successive growing seasons. Dry grains of winter wheat cv. Kobra were irradiated with 300 Gy radiation from a cobalt 60 gamma irradiator. Treated and control grains were pregerminated and subjected to vernalization for 0, 42 or 54 days. Morphological parameters of the plants developing from irradiated seeds (M1 generation) and the plants grown from the seeds produced by the irradiated plants (M2 generation) were measured in order to track the studied effects over two generations. Irradiation of dry grains slowed the growth and development of the plants regardless of the temperature treatment. The measured yield structure elements appeared to be lower for irradiated plants, but no clear effect of radiation on vernalization requirements was noted.
Źródło:
Acta Biologica Cracoviensia. Series Botanica; 2013, 55, 1
0001-5296
Pojawia się w:
Acta Biologica Cracoviensia. Series Botanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Poncelet’s porism in transformation group framework
Autorzy:
Cieślak, W.
Felińska, H
Szuster, J.
Mozgawa, W.
Powiązania:
https://bibliotekanauki.pl/articles/102662.pdf
Data publikacji:
2014
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
transformation group
Poncelet's porism
Opis:
In this paper we introduce a transformation group connected with Poncelet’s porism. Several open questions following from our considerations end the paper. The aim of this paper is to give a new approach to find an algebraic Fuss-type formula for all natural n>2. Developed method may be applied to investigations of Poncelet’s porism.
Źródło:
Advances in Science and Technology. Research Journal; 2014, 8, 24; 28-31
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An impact of engine downsizing on change of engine weight
Autorzy:
Sroka, Z. J.
Cieślak, M.
Powiązania:
https://bibliotekanauki.pl/articles/247468.pdf
Data publikacji:
2015
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
combustion engine
downsizing
weight change
Opis:
One of the trends for development of internal combustion engine is downsizing, which in its final form leads to reduction of fuel consumption and limitation of carbon dioxide concentration in the exhaust gases. The obvious effect of reducing the volume of a cylinder is to reduce the dimensions of the various components, e.g. piston with rings and pin, connecting rod, crankshaft, engine block etc. Changes of geometric dimensions also affect the change in mass of each element and consequently − the whole engine. Expected weight reduction will be a benefit in considering downsizing techniques as another significant development trend in automotive applications associated with a reduction in the weight of the complete vehicle – called “light weight vehicle”. The paper discusses the various forms of downsizing (by stroke, by diameter and mix) and their impacts on the changes in engine mass. The engine Subaru Flat 4, constructed with standard components in terms of design and materials was tested by virtual recognition in mass changes. Original drawings of components and sets have been simplified by for example does not account for chamfers and chops. When calculating also omitted the weight of typical accessories (e.g. fuel lines or electronic components), assuming that each considered option has the same equipment. The highest change in the weight of minus 7.27 % relative to the standard engine was done with downsizing by diameter and smallest one (-6.09 %) by downsizing mix.
Źródło:
Journal of KONES; 2015, 22, 2; 213-219
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Development of Rapidly Solidified Magnesium – Copper Ribbons
Autorzy:
Pastuszak, M.
Cieślak, G.
Dobkowska, A.
Mizera, J.
Kurzydłowski, K. J.
Powiązania:
https://bibliotekanauki.pl/articles/958209.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
magnesium-based alloys
rapid solidification
microstructure
mechanical properties
corrosion properties
Opis:
The aim of the present work was to plan and carry out an experiment consisting of amorphization of industrial magnesium alloy WE 43 (Mg - 4 Y - 3 RE - 0.5 Zr) modified by the copper addition. Investigated alloy modified with 20% of copper was rapidly quenched with the use of melt spinning technique. The effects of cooling rate on the structure and properties of the obtained material were extensively analyzed. The structure and phase analysis of samples were examined using X-ray diffraction method (XRD) while the thermal stability of the samples was determined by differential scanning calorimetry (DSC). Microstructure observations were also conducted. The microhardness tests (HV0.02) and corrosion resistance tests were carried out to investigate the properties of the material. Corrosion resistance measurements were held using a typical three-electrode system. As the result of the research, the effect of cooling rate on microstructure and properties of investigated alloy was determined.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 2B; 1083-1088
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Comparison of the Microstructure and Corrosion Resistance of Sand Cast Aluminum Alloys
Autorzy:
Dobkowska, A.
Adamczyk–Cieślak, B.
Mizera, J.
Kurzydłowski, K. J.
Kiełbus, A.
Powiązania:
https://bibliotekanauki.pl/articles/352870.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminium-silicon-magnesium alloys
microstructure
corrosion
Opis:
The influence of different types of precipitation on the corrosion behavior was investigated in three aluminum-siliconmagnesium alloys. The microstructures of the alloys were studied through optical (OM) and scanning electron microscopy (SEM). The structures consisted of an α-Al solid solution matrix, Si eutectic crystals, secondary phases AlFeSi and AlMgFeSi (Chinese script), as well as Mg2Si. The corrosion behavior was examined with the use of a potentiodynamic polarization test followed by a SEM surface analysis. The results indicate that all the analyzed samples were in the passive state and AlSi10Mg was less reactive in the corrosive environment.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 1; 209-212
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Safety analysis of water supply systems including protection barriers
Autorzy:
Pietrucha-Urbanik, K.
Rak, J. R.
Tchórzewska-Cieślak, B.
Powiązania:
https://bibliotekanauki.pl/articles/2069151.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
water supply system
protection barriers
event tree
Opis:
Water quality control from the perspective of water supply system users’ safety contributed to create drinking water production and quality control procedures. Contemporary risk hazard analysis should be performed on the stage of production, distribution and storage of tap water. Sequences of undesirable events are considered in the so-called waterworks chain series. This leads to critical control points and gives the ability to provide current control over the processes in the collective water supply system, as well as of their combinations and mutual interactions. Methodology of water consumers protection against incidental pollutions was shown. Algorithm concerning identification of critical control points – CCP was developed .The rules of safety related system into drinking water production have been shown. Also risk assessment using the tree event method was presented.
Źródło:
Journal of Polish Safety and Reliability Association; 2013, 4, 2; 241--248
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Crisis situation management issues in urban areas water supply
Autorzy:
Tchórzewska-Cieślak, B.
Pietrucha-Urbanik, K.
Bajer, J.
Powiązania:
https://bibliotekanauki.pl/articles/2069035.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
water supply system
crisis situation
critical infrastructure
Opis:
In paper the methods of comprehensive analysis of reliability, safety and operation of the water supply system were presented. The main goal of this work is to present the problems associated with the WSS functioning in terms of belonging to critical infrastructure. The analysis of the WSS functioning in face of emergency events occurrence should be one of the priority actions taken by the water companies. The paper presents an application of reliability and safety analysis of water supply in emergency situations.
Źródło:
Journal of Polish Safety and Reliability Association; 2015, 6, 2; 135--146
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Failure risk analysis in the water supply sector management
Autorzy:
Tchórzewska-Cieślak, B.
Rak, J. R.
Pietrucha, K.
Powiązania:
https://bibliotekanauki.pl/articles/2069627.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
water supply
risk management
safety
critical infrastructure
Opis:
The subject and main purpose of this study is to develop risk analytic model for the design and operation of water supply sector. A water supply system belongs to the critical infrastructure of cities, and it should be a priority task for waterworks and even for the local authorities to ensure the suitable level of its safety. A water supply systems (WSS) ought to be high reliable continuous operating system. Failure factors in WSS should be identified and prioritized, for example, the causing factors in the most frequent failures in waterpipe network. Drinking water supply utilities are responsible for providing a safe and reliable supply of potable water to their customers. Risk priority helps asset manager to target and refine maintenance plans, capital expenditure plans, investigative activities, and deal with potential failure before it occurs. In this paper, we present a review of classic risk analyses, risk management and new methodology for water supply networks management. This paper presents a framework for the analysis of performance risk in water supply that can be applied to the entire system or to individual subsystems. It is expecting that the methodology for the water supply performance risk analysis would provide the city leadership for decision making support.
Źródło:
Journal of Polish Safety and Reliability Association; 2011, 2, 1; 185--196
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of risk and failure scenarios in water supply system
Autorzy:
Boryczko, K.
Rak, J.
Tchórzewska-Cieślak, B.
Powiązania:
https://bibliotekanauki.pl/articles/2069508.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
fault tree analysis
matrix methods
risk analysis
water supply system
Opis:
Water supply system is complicated technical system which belongs to underground urban infrastructure. Its accurate functioning determines everyday live stability of citizens. Risk analysis is a key phase of the process of water supply safety management. The aim of this paper is to present new propose of methods for risk of the first type (associated with quantity of supplied water) and the risk of the second type (associated with quality of supplied water) analyses in water supply system. The paper contains the description of matrix methods for risk analyses and methods describing cause-and-effect relationship of failure events (fault tree analysis).
Źródło:
Journal of Polish Safety and Reliability Association; 2014, 5, 2; 11--18
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Low genetic diversity of declining Viola uliginosa (Violaceae) at its southern range limits in Poland
Autorzy:
Paul, W.
Cieslak, E.
Ronikier, M.
Migdalek, G.
Slomka, A.
Zabicka, J.
Powiązania:
https://bibliotekanauki.pl/articles/19351.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
Viola uliginosa (bog violet) is a declining species throughout its range due to – mostly anthropogenic – drying out of the wet habitats it occupies. Using AFLP markers, we aimed to estimate the genetic diversity in Polish populations, that may give an insight into the situation of plant populations facing rapid loss of natural habitats. Bog violet from several dispersed Polish populations is generally characterized by very low genetic diversity (HT = 0.048), even lower than several other endangered violets; therefore, we suggest that it should preserve at least EN rank in the red lists/red data books. The mean gene diversity within all populations (HS) was much lower than gene diversity (GST) between populations (0.020 versus 0.583, respectively) which supports the prevalence of clonal propagation of the species (mainly by stolons) but may also point to some significance of autogamy in cleisto- and chasmogamous flowers. A high FST value and the Mantel test for all populations revealed significant isolation by distance. Geographically neighboring pairs of populations formed genetic clusters supported by all (in the case of two closest populations) or most statistical analyses applied. Special attention should be paid to the locus classicus of the species in Rząska, consisting of a small number of individuals, forming a genetically distinct group, revealing very low gene diversity (Hj = 0.009) and the longest genetic distance to the remaining populations. Our results can contribute to planning future protection measures for the species at this and other locations. Genetic structure of the studied populations suggests local affinities of populations but does not generally support hypothesized recent continuity of V. uliginosa range along the river valleys of southern Poland; this view may, however, be altered with widening of the scope of studied populations and chosen molecular markers.
Źródło:
Acta Biologica Cracoviensia. Series Botanica; 2016, 58, 2
0001-5296
Pojawia się w:
Acta Biologica Cracoviensia. Series Botanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Precipitation Processes and Mechanical Properties of Aged Inconel 718 Alloy after Annealing
Autorzy:
Maj, P.
Adamczyk-Cieślak, B.
Slesik, M.
Mizera, J.
Pieja, T.
Sieniawski, J.
Gancarczyk, T.
Dudek, S.
Powiązania:
https://bibliotekanauki.pl/articles/352832.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
inconel 718
mechanical properties
heat treatment
Opis:
Inconel 718 is a precipitation hardenable nickel-iron based superalloy. It has exceptionally high strength and ductility compared to other metallic materials. This is due to intense precipitation of the γ’ and γ” strengthening phases in the temperature range 650-850°C. The main purpose of the authors was to analyze the aging process in Inconel 718 obtained in accordance with AMS 5596, and its effect on the mechanical properties. Tensile and hardness tests were used to evaluate the mechanical properties, in the initial aging process and after reheating, as a function of temperature and time respectively in the ranges 650°-900°C and 5-480 min. In addition, to link the mechanical properties with the microstructure transmission microscopy observations were carried out in selected specimens. As a result, factors influencing the microstructure changes at various stages of strengthening were observed. The authors found that the γ’’ phase nucleates mostly homogenously in the temperature range 650-750°C, causing the greatest increase in strength. On the other hand, the γ’ and δ phases are formed heterogeneously at 850°C or after longer annealing in 800°C, which may weaken the material.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 3; 1695-1702
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza ryzyka eksploatacyjnego w polskim zakładzie wzbogacania węgla
Analysis of operational risk in a Polish coal preparation plant
Autorzy:
Cieślak, W.
Sablik, J.
Martyniak, J.
Wycisk, H.
Powiązania:
https://bibliotekanauki.pl/articles/318586.pdf
Data publikacji:
2002
Wydawca:
Polskie Towarzystwo Przeróbki Kopalin
Tematy:
ryzyko eksploatacyjne
zakład wzbogacania węgla
operational risk
coal preparation plant
Opis:
W artykule przedstawiono metodykę i wyniki badań umożliwiających charakterystykę zakładu wzbogacania węgla metodą analizy ryzyka w zakresie eksploatacji oraz wnioski, które mogą być wykorzystane przy podejmowaniu decyzji w zakresie zarządzania produkcją oraz decyzji inwestycyjnych.
The article presents methodology and results of studies, which allow to characterise a coal preparation plant by means of operational risk analysis and to draw conclusions which could be used for making production management and investment decisions.
Źródło:
Inżynieria Mineralna; 2002, R. 3, nr 1, 1; 21-30
1640-4920
Pojawia się w:
Inżynieria Mineralna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mutations modulate soluble carbohydrates composition in seeds of Lathyrus sativus L.
Autorzy:
Piotrowicz-Cieslak, A I
Rybinski, W.
Michalczyk, D.J.
Powiązania:
https://bibliotekanauki.pl/articles/57224.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
mutagenesis
soluble carbohydrate
seed
Lathyrus sativus
mutant
galactosyl cyclitol
Opis:
Seeds of Lathyrus sativus cv. Derek and Krab were used as biological material for induced mutagenesis. Three mutant lines were obtained from seeds of grass pea cv. Derek and 15 lines from mutagenised seeds of cv. Krab. Twelve ethanol-soluble carbohydrates were identified in the seeds. We have selected grass pea mutant lines with high oligosaccharides content (lines D4, K56, K25, and K7) and lines with low raffinose family oligosaccharides (RFO) content (lines K12, K29 and K13). Mutations changing the levels of RFO have not affected the contents of galactosyl cyclitols.
Źródło:
Acta Societatis Botanicorum Poloniae; 2008, 77, 4; 281-287
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mössbauer and magnetic studies of FeCoNiCuNbSiB nanocrystalline alloys
Autorzy:
Grabias, A.
Basykh, V.
Ferenc, J.
Cieślak, G.
Kulik, T.
Kopcewicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/146338.pdf
Data publikacji:
2017
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
amorphous ribbons
nanocrystalline alloys
Mössbauer spectroscopy
soft magnetic properties
Opis:
Nanocrystalline Fe80–x–yCoxNiyCu1Nb3Si4B12 alloys were prepared by the annealing of amorphous ribbons. Primary crystallization of the alloys annealed at temperatures of between 500 and 550°C was studied by X-ray diffraction and Mössbauer spectroscopy. Magnetic properties of the alloys were investigated using a hysteresis loop tracer and vibrating sample magnetometer. The annealed ribbons are composed of a two-phase nanostructure consisting of bcc Fe-based grains embedded in an amorphous matrix. Conversion electron Mössbauer spectroscopy (CEMS) measurements reveal a more advanced crystallization process in the surface layers when compared with the volume of the ribbons. The degree of saturation magnetization of the nanocrystalline alloys is of about 1.5 T. The coercive fi eld varies from 1.0 to 6.5 A/m and peaks at an annealing temperature of 525°C. Magnetic softening of the nanocrystalline alloys observed after annealing at 550°C is correlated with a volume fraction of the nanocrystalline bcc phase.
Źródło:
Nukleonika; 2017, 62, 2; 79-84
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Use of Biofiltration Process to Remove Organic Matter From Groundwater
Autorzy:
Papciak, D.
Kaleta, J.
Puszkarewicz, A.
Tchórzewska-Cieślak, B.
Powiązania:
https://bibliotekanauki.pl/articles/952351.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
groundwater
biofiltration process
total organic carbon (TOC)
water treatment
Opis:
The article describes the research on the removal of organic matter from natural underground water using biofiltration process. The study was carried out in semi-technical scale on a model filter composed of activated carbon WD-extra. The development of biological activity in a biosorption bed, as well as observations on the relationship between the processes of sorption and biodegradation was evaluated based on the Eberhardt, Madsen, Sontheimer (EMS) test. Leading operation control parameters of biologically active carbon filter BAF included: change of TOC content, dissolved oxygen and permanganate index. To evaluate the colonization of granular carbon determination of ATP value was used. The presence of the biofilm was found by observation using light and scanning microscopes. The organic compounds in the water taken were adsorbed 100% and 70% biodegradable. The combination of sorption process with biodegradation until depletion of activated carbon adsorption capacity allowed in the initial phase of coalbed work for the removal of organic matter in approx. 100%. Formation of biofilm at the right time allowed to extend the filtration cycle and helped lower the TOC by 70%, i.e. from 10 mg C/l to 3–4 mg C/l.
Źródło:
Journal of Ecological Engineering; 2016, 17, 3; 119-124
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling of the interface evolution during Si layer growth on a partially masked substrate
Autorzy:
Gulkowski, S.
Olchowik, J.
Cieślak, K.
Moskvin, P.
Powiązania:
https://bibliotekanauki.pl/articles/1934033.pdf
Data publikacji:
2011
Wydawca:
Politechnika Gdańska
Tematy:
epitaxial lateral overgrowth
liquid-phase epitaxial growth
computer simulations
Opis:
High-quality thin Si layers obtained from the solution by epitaxial lateral overgrowth (ELO) can play a crucial role in photovoltaic applications. The laterally overgrown parts of the layer are characterized by a lower dislocation density than that of the substrate. The height and width of the layer depend on several factors, such as the technological conditions of liquid phase expitaxy (LPE), growth temperature, cooling rate and the geometry of the system (mask filling factor). Therefore, it is crucial to find the optimal set of technological parameters in order to obtain very thin structures with a maximum width (high aspect ratio). This paper presents a computational study of Si epilayer growth on a line-pattern masked silicon substrate from Si-Sn rich solution. To solve this problem, a mixed Eulerian-Lagrangian approach was applied. The concentration profile was calculated by solving the two-dimensional diffusion equation with appropriate boundary conditions. The growth velocity was determined on the basis of gradients of concentration in the border of the interface. Si interface evolution from the opened window was demonstrated.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2011, 15, 1; 91-98
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Risk analysis of water supply interruptions in collective water supply systems
Autorzy:
Tchórzewska-Cieślak, B.
Rak, J. R.
Piegdoń, I.
Powiązania:
https://bibliotekanauki.pl/articles/2069330.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
water supply
availability
risk management
value of water scarcity
water production subsystem
Opis:
The subject and main purpose of this study is to present the method of risk analysis and assessment of the lack of water supply to the collective water supply system (CWSS). Presented method using the expected value of water scarcity. The analysis was based on all possible states of the operation of water production subsystem. The article contains calculation example of analysis for the exemplary CWSS with regard to absolute risk, equal to the expected value of water scarcity and the relative risk referred to the nominal value of the water demand. In the example attached special importance to the criteria levels of the relative risk of lack of water supply. Presented method is a new concept which allows to make comprehensive analysis of reliability, safety and operation of the collective water supply system.
Źródło:
Journal of Polish Safety and Reliability Association; 2012, 3, 2; 201--208
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research on Technology of Alloyed Copper Casting
Autorzy:
Rzadkosz, S.
Kranc, M.
Garbacz-Klempka, A.
Piękoś, M.
Kozana, J.
Cieślak, W.
Powiązania:
https://bibliotekanauki.pl/articles/380832.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
casting technology
copper
alloyed copper
copper deoxidation
heat treatment
technologia odlewnicza
miedź
obróbka cieplna
Opis:
The work presents experiment results from the area of copper casting technology and chosen examples of alloyed copper. At present, copper casting technology is applied in many branches of industrial manufacturing, especially in the sector of construction, communications, arms and power engineering. Alloyed copper, containing slight additions of different elements and having special physio-chemical properties, is used in a special range of applications. Copper technology and alloyed copper analyses have been presented, these materials being used for cast manufacturing for power engineering. The quality of casts has been assessed, based on their microstructure analysis, chemical content and the cast properties. During the research, special deoxidizing and modifying agents were applied for copper and chosen examples of alloyed copper; also exemplary samples were tested with the help of metallographic analysis, electrical conductivity and gaseous impurities research.
Źródło:
Archives of Foundry Engineering; 2014, 14, 2; 79-84
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effects of temperature on the dormancy and germination of Cirsium arvense [L.] Scop. seeds
Autorzy:
Bochenek, A
Golaszewski, J.
Piotrowicz-Cieslak, A.I.
Gorecki, R.J.
Powiązania:
https://bibliotekanauki.pl/articles/57089.pdf
Data publikacji:
2009
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
weed
stratification
weed seed
seed
seed dormancy
life cycle
dormancy
temperature effect
afterripening
Cirsium arvense
germination
perennial species
Opis:
The ecophysiological regulation of seed dormancy in perennial species and those with a varied life cycle has not been studied in detail yet. That is why an attempt has been made to determine the Cirsium arvense seed water relations during stratification and afterripening at different temperatures and germination at constant or fluctuating temperatures on the basis of the hydrotime model. The obtained results showed that breaking of the primary dormancy of achenes took place only during the first stratification month at moderate temperatures, mainly due to an increase in the average water-stress tolerance in a seed population. The induction of secondary seed dormancy during after-ripening at all temperatures resulted mostly from a substantial loss of the seeds' ability to tolerate water stress. Fluctuating temperatures affected neither seed germination nor the hydrotime model parameters. The analysis of the variations of hydrotime model parameters allows a better understanding of the physiological basis of seed dormancy relief and induction.
Źródło:
Acta Societatis Botanicorum Poloniae; 2009, 78, 2; 105-114
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-25 z 53

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