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Tytuł:
Assessing the applicability of new refrigerants in marine cooling systems
Autorzy:
Zakrzewski, B.
Łokietek, T.
Powiązania:
https://bibliotekanauki.pl/articles/259543.pdf
Data publikacji:
2010
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
TEWI
ODP
GWP
heat pump
air conditioning
cooling installations
refrigerant
R22 substitute
energetic efficiency
R41
R152a
R218
R227ea
RC318
R600a
R290
R1270
Opis:
The article assesses the applicability of new refrigerants, being possible substitution for Freon 22, in marine refrigeration and air-conditioning systems. A collection of technical data on the physical properties of the new refrigerants is presented. Suggestions are made about certain energetic and ecological profits which can be gained when using energetically efficient refrigerants with low GWP values. The results of the TEWI comparison analysis for selected refrigerants are also included.
Źródło:
Polish Maritime Research; 2010, 2; 55-59
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Czy prawo wierzyciela do zaspokojenia wierzytelności z majątku wspólnego małżonków (art. 41 § 1 k.r.o.) może zostać zrealizowane także przez wniesienie powództwa przeciwko małżonkowi dłużnika?
May the creditor’s right to be satisfied out of the joint property of spouses (art. 41 §1 of the Family and Guardianship Code) be exercised by bringing an action against the debtor’s spouse?
Autorzy:
Wolak, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/1201106.pdf
Data publikacji:
2020
Wydawca:
Krakowska Akademia im. Andrzeja Frycza Modrzewskiego
Tematy:
debtor
debtor’s spouse
system of joint property of spouses
responsibility for obligations
execution out of joint property
dłużnik
małżonek dłużnika
ustrój wspólności majątkowej małżeńskiej
odpowiedzialność za zobowiązania
egzekucja z majątku wspólnego
Opis:
W opracowaniu podjęta została próba odpowiedzi na pytanie o to, czy przyznanie w art. 41 k.r.o. wierzycielowi, którego osobistym dłużnikiem jest jeden z małżonków, możliwości żądania zaspokojenia z majątku wspólnego powoduje, że drugi z małżonków staje się dłużnikiem w znaczeniu prawa materialnego, z ograniczeniem jego odpowiedzialności do majątku objętego wspólnością majątkową, czy też obowiązkiem takiego małżonka jest jedynie znoszenie egzekucji z majątku wspólnego. Chodzi m.in. o to, czy wierzyciel dysponujący tytułem wykonawczym przeciwko dłużnikowi może – niezależnie czy podjął starania o uzyskanie klauzuli wykonalności przeciwko małżonkowi dłużnika na podstawie art. 787 k.p.c., które okazały się bezskuteczne, czy też starań tych w ogóle nie podjął – domagać się w pozwie przeciwko małżonkowi dłużnika spełnienia świadczenia, odwołując się do art. 41 § 1 k.r.o. Autor nie aprobuje poglądu, że obowiązkiem małżonka dłużnika jest w takim przypadku jedynie znoszenie egzekucji z majątku wspólnego.   
An attempt has been made in this study to answer the question whether the possibility to demand satisfaction out of joint property, granted in art. 41 of the Family and Guardianship Code to a creditor whose personal debtor is one of the spouses, causes that the other spouse becomes a debtor in the meaning of substantive law with the limitation of his liability to assets covered by community of property, or whether such a spouse’s obligation is only abolishing the execution out of joint property. This is, among others, about whether the creditor with an enforceable title against the debtor may – regardless of whether he has attempted to obtain an enforcement clause against the debtor’s spouse under art. 787 of the Code of Civil Procedure, which proved to be ineffective, or whether he has not even made such efforts at all – demand in an action against the debtor’s spouse the fulfillment of the benefit having referred to art.41 §1 of the Family and Guardianship Code. Author doesn’t approve the view that in this case a spouse’s obligation is only abolishing the execution out of joint property.
Źródło:
Studia Prawnicze: rozprawy i materiały; 2020, 1(26); 33-59
1689-8052
2451-0807
Pojawia się w:
Studia Prawnicze: rozprawy i materiały
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Czerniaków : warszawskie Termopile 1944 : przewodnik historyczny po miejscach walk i straceń z dni Powstania Warszawskiego
Autorzy:
Mórawski, Karol (1935-2023).
Świerczek, Lidia.
Data publikacji:
2001
Wydawca:
Warszawa : Fundacja "Wystawa Warszawa Walczy 1939-1945" : ["Askon"]
Tematy:
Warszawa. Szpital Polowy nr 1 ("Blaszanka") ul. Przemysłowa 19/21 sierpień-wrzesień 1944 r.
Warszawa. Szpital Polowy nr 1 (zakłady "Citroëna") ul. Czerniakowska 199 wrzesień 1944 r.
Warszawa. Szpital Polowy ul. Zagórna 12 sierpień-wrzesień 1944 r.
Warszawa. Szpital Polowy ul. Zagórna 14 sierpień-wrzesień 1944 r.
Warszawa. Szpital Polowy ul. Zagórna 9 wrzesień 1944 r.
Warszawa. Szpital Polowy nr 3 ul. Okręg 2 sierpień-wrzesień 1944 r.
Warszawa. Szpital Polowy nr 3 ul. Okręg 4a sierpień-wrzesień 1944 r.
Warszawa. Szpital Polowy ul. Czerniakowska róg Górnośląskiej 1944 r.
Warszawa. Szpital Polowy ul. Czerniakowska 168 sierpień 1944 r.
Warszawa. Szpital Polowy ul. Wilanowska 24 sierpień 1944 r.
Warszawa. Szpital Polowy ul. Solec 41 wrzesień 1944 r.
Warszawa. Szpital ZUS ul. Czerniakowska 231 sierpień-wrzesień 1944 r.
Warszawa. Punkt Ratowniczo-Sanitarny ul. Czerniakowska 231 sierpień-wrzesień 1944 r.
Warszawa. Punkt Ratowniczo-Sanitarny ul. Czerniakowska 124 sierpień 1944 r.
Warszawa. Punkt Ratowniczo-Sanitarny ul. A. Idźkowskiego 4 wrzesień 1944 r.
Warszawa. Punkt Ratowniczo-Sanitarny ul. Ludna 9 sierpień-wrzesień 1944 r.
Warszawa. Punkt Ratowniczo-Sanitarny ul. Okrąg 2 sierpień-wrzesień 1944 r.
Warszawa. Punkt Ratowniczo-Sanitarny ul. Przemysłowa 6 sierpień 1944 r.
Warszawa. Punkt Ratowniczo-Sanitarny ul. Przemysłowa 9 sierpień 1944 r.
Warszawa. Punkt Ratowniczo-Sanitarny ul. Przemysłowa róg Czerniakowskiej sierpień 1944 r.
Warszawa. Punkt Ratowniczo-Sanitarny ul. Rozbrat Czerniakowskiej wrzesień 1944 r.
Warszawa. Punkt Ratowniczo-Sanitarny ul. Solec 53 Czerniakowskiej wrzesień 1944 r.
Warszawa. Punkt Ratowniczo-Sanitarny ul. C. Śniegockiej róg Czerniakowskiej wrzesień 1944 r.
Warszawa. Punkt Ratowniczo-Sanitarny ul. Wilanowska 1 wrzesień 1944 r.
Warszawa. Punkt Ratowniczo-Sanitarny ul. Wilanowska 3 wrzesień 1944 r.
Warszawa. Punkt Ratowniczo-Sanitarny ul. Wilanowska 5 wrzesień 1944 r.
Warszawa. Punkt Ratowniczo-Sanitarny ul. Wilanowska 18/20 wrzesień 1944 r.
Powstanie warszawskie (1944)
Zabezpieczenie medyczne
Opis:
S. 121-123, Szpitale i punkty ratowniczo-sanitarne działające w czasie Powstania 1944 r. na terenie Czerniakowa.
Dostawca treści:
Bibliografia CBW
Książka
Tytuł:
Near Magnetic Field of a Small Turbojet Engine
Autorzy:
Andoga, R.
Főző, L.
Powiązania:
https://bibliotekanauki.pl/articles/1030273.pdf
Data publikacji:
2017-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
41.20.-q
Opis:
Different parameters like temperatures, pressures, speed, and vibrations are used in evaluation of technical state of turbojet engines. The article presents a pioneering idea to expand this set of parameters with measurements of distortions in magnetic field in a close vicinity of the engine to obtain more information about its state, which can be further used in its diagnostic and control systems. We believe that deviations in near magnetic field can hold valuable information, which can be used to predict malfunctions and evaluate the condition of the engine. The presented article shows pilot experimental results and gives answer to the basic hypothesis, if such measurements can be realized using a small turbojet engine, as well if there are significant changes in near magnetic field, which would warrant further research in the area.
Źródło:
Acta Physica Polonica A; 2017, 131, 4; 1117-1119
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Positron annihilation study of iron oxide nanoparticles in mesoporous silica MCM-41 template
Autorzy:
Surowiec, Z.
Wiertel, M.
Zaleski, R.
Budzyński, M.
Goworek, J.
Powiązania:
https://bibliotekanauki.pl/articles/148449.pdf
Data publikacji:
2010
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
positron annihilation
Mössbauer effect
MCM-41 porous silica
superparamagnetic nanoparticles
Opis:
The subject of investigation were the samples obtained by impregnation of MCM-41 template with an aqueous solution prepared from Fe(NO3)3ź9H2O. As a result of such a procedure, iron oxides deposits on MCM-41 were formed. The Mössbauer studies revealed an occurrence of Fe3O4 nanocrystallites in the both ferri- and superparamagnetic states. Almost 80% small particles exist in a paramagnetic state. The positron annihilation lifetime spectroscopy (PALS) spectra were measured in air or in vacuum. The long-lived ortho-positronium (o-Ps) components and their intensities are time dependent due to air molecules interaction with iron oxide nanocrystallites and silica walls surfaces. The adsorption of air on the nanocrystallites surface causes a total screening of their surface and a raise of the o-Ps lifetime values. Observed anti-quenching effect is a result of competition of two phenomena: practically switching off a pick-off mechanism related to interaction of o-Ps with magnetite nanoparticles and considerably weaker usual quenching by paramagnetic oxygen molecules.
Źródło:
Nukleonika; 2010, 55, 1; 91-96
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Eskadra nowych możliwości : 41. elt
Autorzy:
Orłowski, Sławomir.
Gardas, Eugeniusz.
Hać, Ryszard (1958- ).
Rajchel, Jan (1964- ).
Powiązania:
Wiraże 2004, nr 5, s. 2-3
Data publikacji:
2004
Tematy:
41 Eskadra Lotnictwa Taktycznego (Malbork) dowódcy mianowanie uroczystości
Eskadra lotnictwa taktycznego dowódca mianowanie uroczystości
Dziadczykowski Robert służba wojskowa 1983-2004 r.
Lotnictwo taktyczne jednostki
Opis:
Zawiera wypow.: ppłk. pil. Eugeniusza Gardasa, dcy 22 BLot. w Malborku, ppłk. pil. Ryszarda Hacia, dcy 1. BLT w Świdwinie oraz ppłk. pil. Jana Rajchela, byłego dcy 41. elt w Malborku, obecnie dcy 23. BLot w Mińsku Mazowieckim.
Fot.
Dostawca treści:
Bibliografia CBW
Artykuł
Tytuł:
TE Surface Waves in a Plasma Sandwich Structure
Autorzy:
Shaikh, M.
Zamir, B.
Ali, R.
Powiązania:
https://bibliotekanauki.pl/articles/1189881.pdf
Data publikacji:
2015-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
41.20.Jb
84.40.Az
Opis:
Transverse electric surface waves are analyzed in a plasma medium bounded by a left-handed material. A dispersion relation is obtained by applying the boundary conditions for the tangential field components. Numerical investigations show the dependence of effective wave index on the propagation frequency for different thicknesses and number densities of the plasma medium and also for different values of the filling factor of left-handed material.
Źródło:
Acta Physica Polonica A; 2015, 127, 6; 1625-1629
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experience Gained during the Decommissioning of the SSEC from the VVR-S Nuclear Research Reactor
Autorzy:
Deju, R.
Iorga, I.
Gurau, D.
Powiązania:
https://bibliotekanauki.pl/articles/1033371.pdf
Data publikacji:
2017-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
28.41.Te
Opis:
The VVR-S nuclear research reactor owned by Horia Hubulei National Institute of Physics and Nuclear Engineering was designed for research and radioisotope production being permanently shut-down in 2002 after 40 years of operation. The decommissioning of the reactor started in 2010 and is planned to be finalized in 2020, being the first nuclear research reactor that has started the decommissioning project from the South-East of Europe. This paper presents the lessons learned from the decommissioning of systems, structures, equipment and components from pumps room. The experiences gained cover a diverse range of topics from planning, approval, radiological characterization process made, dismantling, equipment used, resources, etc. Radiation protection and economics are the key factors for the selection of technology for decommissioning. The evaluation of the available technology has been made and areas for improving the technology have been identified. Dedicated and advanced technologies were chosen to perform specific tasks. The project was planned well in advance. Safety aspects have been taken into consideration. Resource constraints have also been an important issue considered in defining the decommissioning strategy. Experiences and knowledge were presented and shared with the community.
Źródło:
Acta Physica Polonica A; 2017, 131, 1; 82-88
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Confined Metamaterial Structures Based on Coordinate Transformations
Autorzy:
Vasić, B.
Gajić, R.
Isić, G.
Hingerl, K.
Powiązania:
https://bibliotekanauki.pl/articles/1807844.pdf
Data publikacji:
2009-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
03.50.De
41.20.Jb
42.70.-a
Opis:
We apply transformation optics to structures in which the electromagnetic field is confined by highly conducting coatings. The possibility of changing the field propagation direction without perturbation is demonstrated on the example of a waveguide bend. Using this approach it is also possible to reshape a confined structure in order to meet certain external requirements and to redistribute a field in order to obtain desired field distribution. The structure implementation implies replacing a part of given confined structure with a metamaterial designed using the technique of transformation optics. Simplification of structure realization based on using reduced set of material parameters is examined. Our theoretical considerations are confirmed by full wave finite element simulations of a waveguide bend.
Źródło:
Acta Physica Polonica A; 2009, 116, 1; 96-98
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Polskie groby wojenne w Arjeplog
Autorzy:
Bratbak, Bjorn.
Powiązania:
Dziennik Polski (Londyn) 2005, nr 100, s. 7 ; nr 101, s. 6
Data publikacji:
2005
Tematy:
Kolin, Tadeusz
Matuszek, Jan
Baupionier-Bataillon 41 (Niemcy) 1940-1944 r.
Jeńcy wojenni polscy Niemcy 1939-1945 r.
Groby żołnierskie polskie Arjeplog (Szwecja)
Opis:
Losy polskich jeńców (stalag IA Stablack, następnie Baupionier-Bataillon 41 -- budowa linii kolejowej w Norwegii, ucieczka).
Fot.
Dostawca treści:
Bibliografia CBW
Artykuł
Tytuł:
The Shielding Effectiveness of a Magnetic Fluid in Radio Frequency Range
Autorzy:
Dolník, B.
Rajňák, M.
Cimbala, R.
Kolcunová, I.
Kurimský, J.
Džmura, J.
Petráš, J.
Zbojovský, J.
Kosterec, M.
Kopčanský, P.
Timko, M.
Powiązania:
https://bibliotekanauki.pl/articles/1030481.pdf
Data publikacji:
2018-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
41.20.Jb
41.20.Gz
75.50.Mm
81.70.Ex
07.50.Hp
Opis:
This article builds on the previous work and describes the interaction of transformer oil-based magnetic fluid (MF) with the radio frequency (RF) magnetic near-field. Three prepared samples of the MF used as a barrier to magnetic near-field, consist of transformer oil and dispersed magnetite nanoparticles coated with oleic acid. We pay attention to the important area related to the electromagnetic field shielding by the MF. Such sample of the MF may be a good candidate for applications where it is necessary to simultaneously electrically isolate, remove the excess of heat and to shield electromagnetic interference (EMI). We present a method for the determination of shielding effectiveness (SE) of the MF under RF excitation conditions ranging from 500 MHz to 3 GHz. We report the effect of magnetic volume fraction in the MF and the effect of the sample thickness on the SE.
Źródło:
Acta Physica Polonica A; 2018, 133, 3; 585-587
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Imperfect Cloaking Devices Based on Metamaterials
Autorzy:
Isić, G.
Gajić, R.
Novaković, B.
Popović, Z. V.
Hingerl, K.
Powiązania:
https://bibliotekanauki.pl/articles/2047887.pdf
Data publikacji:
2007-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
41.20.Jb
42.25.Fx
78.20.Ci
Opis:
Cloaking devices designed using the coordinate transform approach were shown to be realizable, at least in principle, within the realm of electromagnetic metamaterials. In this paper we investigate the strictness of conditions imposed on the parameters of metamaterial cloaks by calculating the degree of wave scattering when those parameters have variations with respect to theoretically ideal values. A simple idea is used to obtain analytic results for the case of the nonideal two-dimensional cloaking cylinder. Also, results of realistic finite element simulations of the Helmholtz equation are presented and it is found that they are in excellent agreement with the analytic results.
Źródło:
Acta Physica Polonica A; 2007, 112, 5; 1083-1088
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Neutron Shielding Properties of Concrete and Ferro-Boron
Autorzy:
Sarıyer, D.
Küçer, R.
Küçer, N.
Powiązania:
https://bibliotekanauki.pl/articles/1401975.pdf
Data publikacji:
2015-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
02.70.Uu
28.41.Qb
87.52.-g
87.52.Ga
Opis:
The problem of shielding against high-energy neutrons has always attracted a great deal of attention. Neutron shielding requires slowing down energetic neutrons and absorbing with a shield material. Concrete is one of the best known materials for neutron shielding and ferro-boron is described as an alternative shielding material in this study. FLUKA Monte Carlo simulation code was used for the application of shielding calculation. When the simulation results are compared, it is clear that ferro-boron is more effective in neutron shielding than the concrete.
Źródło:
Acta Physica Polonica A; 2015, 128, 2B; B-201-B-202
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Response of a Magnetic Fluid to Radio Frequency Electromagnetic Field
Autorzy:
Dolník, B.
Rajňák, M.
Cimbala, R.
Kolcunová, I.
Kurimský, J.
Balogh, J.
Džmura, J.
Petráš, J.
Kopčanský, P.
Timko, M.
Briančin, J.
Fabián, M.
Powiązania:
https://bibliotekanauki.pl/articles/1032825.pdf
Data publikacji:
2017-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
41.20.Jb
41.20.Gz
75.50.Mm
81.70.Ex
07.50.Hp
Opis:
Electromagnetic pollution generated by the electrical devices has been regarded as a new form of pollution, harmful to the society as air and water pollution. The operation of electronic devices in a polluted electromagnetic environment has caused electromagnetic interference to become important concerns. Devices that are vulnerable to interference must often be shielded to protect them from the effects of electromagnetic interference. In this work we describe an interaction of a magnetic fluid based on transformer oil with alternating magnetic field. The magnetic fluid was composed of a transformer oil and dispersed magnetite nanoparticles coated with oleic acid. Among the wide range of topics covered, we pay attention to an important field related to the absorption of electromagnetic field by magnetic fluid as a suitable candidate for applications where it is necessary to electrically isolate, remove excess of heat, and to shield electromagnetic fields. We present a method for the determination of shielding effectiveness of the magnetic fluid under high-frequency excitation conditions from 750 MHz to 3 GHz by means of magnetic near field measurements and analysis. Herein, we report the effect of magnetic volume fraction in the magnetic fluid and the effect of the sample thickness on the shielding effectiveness. We have found that the magnetic fluid has a frequency dependent "windows", characterized that either absorb the magnetic field, or facilitate penetration of the magnetic field through the barrier.
Źródło:
Acta Physica Polonica A; 2017, 131, 4; 946-948
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimized Frequency Selective Surface for the Design of Magnetic Type Thin Broadband Radio Absorbers
Autorzy:
Babayan, V.
Kazantseva, N.
Kazantsev, Yu.
Vilčáková, J.
Moučka, R.
Powiązania:
https://bibliotekanauki.pl/articles/1032283.pdf
Data publikacji:
2017-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
41.20.-q
Opis:
A novel frequency selective surface for expansion of operating frequency range of magnetic-type radio absorbers was elaborated. Frequency selective surface represents an array of flat electrically conductive elements deposited on the polyethylene terephthalate (PET) foil. The elements have a closed-loop structure on the one side of the foil, and on the opposite side, the conductive elements have the shape of solid fragments which connect projections of the neighboring closed loops. The advantage of such frequency selective surface design is that owing to capacitive shunting one can achieve the value of frequency selective surface quality factor (Q-factor) as low as 0.5. Operating frequency range and thickness of designed radio absorbers depend on the composition of polymer-magnetic material and the position of frequency selective surface therein.
Źródło:
Acta Physica Polonica A; 2017, 131, 4; 1147-1149
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of Power and Energy Consumption for Hard Turning and Burnishing Operations of 41CR4 Steel
Autorzy:
Chudy, R.
Grzesik, W.
Powiązania:
https://bibliotekanauki.pl/articles/99749.pdf
Data publikacji:
2015
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
machine tool
power consumption
hard turning
burnishing
Opis:
This paper presents a new power measurement system which allows recording the power consumption profile and determining its components related to all the controlled axes. The system is based on computer processing of signals generated by current and voltage sensors connected to spindle and axis driving electric motors. It should be noted that these motors are controlled independently with different frequencies and voltages. By using LabVIEW data acquisition system, it is possible to record total power consumption and its components during a typical machining operation. This study concerns the power consumption in a sequence machining process consisting of hard turning and ball burnishing operations under variable machining conditions.
Źródło:
Journal of Machine Engineering; 2015, 15, 4; 113-120
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Outdoor Ageing of an Ethylene-Propylene Copolymer: A Positron Annihilation Study
Autorzy:
Consolati, G.
Quasso, F.
Gallo, R.
Severini, F.
Powiązania:
https://bibliotekanauki.pl/articles/2043322.pdf
Data publikacji:
2005-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.41.+e
78.70.Bj
81.05.Lg
Opis:
An investigation on the environmental degradation of an ethylene-propylene copolymer was carried out through positron annihilation lifetime spectroscopy, density and differential scanning calorimetry measurements. Polymer sheets were exposed to sunlight up to 11000 hours. Density and melting enthalpy increase with ageing, while ortho-positronium intensity decreases; ortho-positronium lifetime does not show significant variations up to 4400 hours. At higher exposures it starts to decrease. Outdoor ageing produces an increased crystallinity of the copolymer; also a degradation occurs with formation of carbonyl groups. The corresponding Ps inhibition is the main reason for the decrease in ortho-positronium intensity, the other one being the reduced amount of the amorphous phase available. The lifetime decrease observed at the highest exposures can be interpreted in terms of a shrinking of the nanoholes trapping positronium.
Źródło:
Acta Physica Polonica A; 2005, 107, 5; 805-810
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Positron Porosimetry Studies of Template Removal from As-Synthesized MCM-41 Silica
Autorzy:
Zaleski, R.
Wawryszczuk, J.
Powiązania:
https://bibliotekanauki.pl/articles/1812554.pdf
Data publikacji:
2008-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.70.Bj
36.10.Dr
61.43.Gt
81.07.-b
Opis:
The course of template removal from MCM-41 pores was investigated by positron annihilation lifetime spectroscopy. Two methods of removal were the object of interest: a decarbonisation after standard calcination procedure and a novel procedure - pyrolysis in vacuum. The shapes of positron lifetime spectra of decarbonised sample are determined by positronium quenching caused by presence of carbon deposit on the surface. Positron annihilation lifetime spectroscopy allows also monitoring the evolution of empty space inside pores. During pyrolysis no conductive carbon is produced, so consecutive stages of template material transformation are easy to observe. In the case of pyrolysis the effect of pore emptying is obtained at temperature 500 K, lower comparing to calcination and decarbonisation (820 K).
Źródło:
Acta Physica Polonica A; 2008, 113, 5; 1543-1550
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of a Soft X-ray Microprobe for Radiobiology Studies
Autorzy:
Appuhamilage, I.
Adjei, D.
Alatabi, S.
Alnaimi, R.
Michette, A.
Pfauntsch, S.
Powiązania:
https://bibliotekanauki.pl/articles/1197646.pdf
Data publikacji:
2014-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
41.50.+h
07.85.Fv
Opis:
The King's College London (KCL) first X-ray microprobe (MKI) and the third generation microfocus X-ray sources (MKIII) are intended to be used for various applications including the study of physical and biological interactions at the atomic and molecular scales. The microfocus ultra-soft X-ray sources (MKI and MKIII) with interchangeable targets will provide a superior spatial resolution (a focal spot a few hundreds of nanometres in diameter can be achieved) and the control of the dose delivered to irradiated cells. This will require characterization of the spectra and intensities of the source, measurements of the focus intensities and spot sizes of suitable X-ray optics such as zone plates, grazing incidence microstructured optical arrays and multilayer mirrors.
Źródło:
Acta Physica Polonica A; 2014, 125, 4; 882-885
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Role of Operational Radioprotection Simulation in the Dismantling of the Protection and Control Rods of VVR-S Reactor
Autorzy:
Iorga, I.
Deju, R.
Gurau, D.
Mincu, M.
Powiązania:
https://bibliotekanauki.pl/articles/1033535.pdf
Data publikacji:
2017-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
28.41.Te
Opis:
The VVR-S nuclear research reactor owned by Horia Hubulei National Institute of Physics and Nuclear Engineering, has functioned between 1957 and 1997 at a nominal thermal power of 2 MW, using less-enriched nuclear fuel (10%), type EK-10, and highly enriched fuel (36%), type S-36. The reactor control was carried out by means of nine rods placed in the central part of the core. Four rods were used for the manual control of power, one for automatic control, three rods for reactor safety (emergency rods) and one for the fine control of power. One of the high hazard operations was the dismantling of the activated-contaminated control rods. Because of a higher radiological risk, simulation was performed to determine the expected maximum dose. The maximum gamma dose rate obtained using simulated results was 3.5 Sv/h, for the highly activated rod. In the real measurement, when the work was performed, the maximum gamma dose rate was 3 Sv/h. ⁹⁰Sr+⁹⁰Y are expected to be present in the control rods radioactivity.
Źródło:
Acta Physica Polonica A; 2017, 131, 3; 514-518
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measurement and Analysis of the Positron Annihilation Lifetime Spectra for Mesoporous Silica
Autorzy:
Zaleski, R.
Powiązania:
https://bibliotekanauki.pl/articles/2047164.pdf
Data publikacji:
2006-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.70.Bj
36.10.Dr
61.43.Gt
81.07.-b
41.75.Fr
Opis:
Positron annihilation lifetime spectroscopy as a technique of porous materials investigation is still under development. Both measurement conditions and lifetime spectra analysis methods have to be adapted to the requirements of positron porosimetry. If complex positron annihilation lifetime spectra of porous materials are processed, numerical methods of lifetime spectra analysis have to be used with a particular care. Among various methods of positron annihilation lifetime spectra analysis available, the most popular ones were tested implemented in programs MELT and LT. It was found, from the simulated spectra study, that a large number of counts in a spectrum is needed to obtain reliable results of analysis. Even then only an approximate solution is available. Determination of the approximation nature helps in a further interpretation of the results and in positron annihilation lifetime spectrometer setting adequate to the problem. For this purpose, a few complex spectra obtained from positron beam facility were tested. The results show a negligible influence of resolution function on long lifetime components, while the precise estimation of the background level is crucial. Also some distortions caused by imperfection of numerical analysis methods are pointed out.
Źródło:
Acta Physica Polonica A; 2006, 110, 5; 729-738
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Lot do historii
Autorzy:
Orłowski, Sławomir.
Hać, Ryszard (1958- ).
Bielewicz, Zbigniew.
Gardas, Eugeniusz.
Mładanowicz, Cezary.
Pawulski, Andrzej.
Powiązania:
Wiraże 2004, nr 2, s. 2-3, 6-7
Data publikacji:
2004
Tematy:
41 Pułk Lotnictwa Myśliwskiego (Malbork)
1 Brygada Lotnictwa Taktycznego. 41 Eskadra Lotnictwa Taktycznego (Malbork, woj. pomorskie)
1 Brygada Lotnictwa Taktycznego. Dwudziesta Druga (22) Baza Lotnicza (Malbork, woj. pomorskie)
MiG-21 (samolot) eksploatacja 1964-2003 r.
MiG-21 (samolot) wycofanie uroczystości 2003 r.
Lotnictwo myśliwskie jednostki 1964-2001 r.
Pułk lotnictwa myśliwskiego 1964-2001 r.
Samoloty myśliwskie eksploatacja 1964-2003 r.
Brygada lotnictwa taktycznego
Eskadra lotnictwa taktycznego
Baza lotnicza
Opis:
Zawiera wypow.: płk pil. Ryszard Hać (dowódca 1 Brygady Lotnictwa Taktycznego), gen. bryg. pil. Zbigniew Bielewicz (szef szkolenia WL), ppłk pil. Eugeniusz Gardas (dowódca 22 BLot.), mjr. rez. pil. Cezary Mładanowicz, ppłk w st. spocz. pil. Andrzej Pawulski (dowódca I eskadry 41. PLM w latach 80.).
Fot.
Dostawca treści:
Bibliografia CBW
Artykuł
Tytuł:
Ortho-positronium migration in mesopores of MCM-41, MSF and SBA-3
Autorzy:
Zaleski, R.
Błażewicz, A.
Kierys, A.
Powiązania:
https://bibliotekanauki.pl/articles/147955.pdf
Data publikacji:
2013
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
nitrogen adsorption/desorption
porous materials
positron annihilation lifetime spectroscopy (PALS)
positronium migration
Opis:
Three materials: MCM-41, MSF and SBA-3 with a very similar pore diameter but different lengths of cylindrical pores were investigated using the nitrogen sorption method and positron annihilation lifetime spectroscopy. The size of primary pores and interparticle spaces obtained by both methods is similar. However, volume ratios between the discussed kinds of pores found by the above-mentioned methods differ significantly. Such discrepancy is the result of both ortho-positronium migration and the inaccessibility of the pores for nitrogen. Comparing the results of nitrogen sorption and positron annihilation lifetime spectroscopy allows us to estimate that connectivity between the primary pores and the interparticle spaces is the highest in MCM-41 and lowest in SBA-3.
Źródło:
Nukleonika; 2013, 58, 1; 235-240
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of Two-Dimensional Photonic Crystal Microcavities as a Function of Refractive Index
Autorzy:
Moukhtari, R.
Hocini, A.
Khedrouche, D.
Powiązania:
https://bibliotekanauki.pl/articles/1398722.pdf
Data publikacji:
2016-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.70.Qs
04.30.Nk
41.20.Jb
42.82.-m
Opis:
Quality factor of two-dimensional photonic crystals microcavity fabricated by SiO₂/ZrO₂ or SiO₂/TiO₂ in which the refractive index varied in the range of 1.51 to 1.58 has been investigated in the present paper. The structure studied consists of circular rods of radius r embedded in air slab, while a is the constant of triangular lattice. Finite difference time domain method with perfectly matched layers was used to calculate the transmission spectrum by FullWAVE software. The results of simulation clearly demonstrate the existences of resonance wavelength of which the position and the highest Q (Q ≈ 4×10⁵) value are strongly affected by refractive index. We demonstrate that the calculated Q factor for the designed cavity increases by a factor of three relative for a cavity without increasing the refractive index.
Źródło:
Acta Physica Polonica A; 2016, 129, 4; 556-558
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Applications of Free Electron Lasers in Biology and Medicine
Autorzy:
Pełka, J.
Tybor, K.
Nietubyć, R.
Wrochna, G.
Powiązania:
https://bibliotekanauki.pl/articles/1539156.pdf
Data publikacji:
2010-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
87.59.-e
41.60.Cr
07.85.Qe
82.53.Ps
87.64.Bx
Opis:
The advent of free electron lasers opens up new opportunities to probe the dynamics of ultrafast processes and the structure of matter with unprecedented spatial and temporal resolution. New methods inaccessible with other known types of radiation sources can be developed, resulting in a breakthrough in deep understanding the fundamentals of life as well as in numerous medical and biological applications. In the present work the properties of free electron laser radiation that make the sources excellent for probing biological matter at an arbitrary wavelength, in a wide range of intensities and pulse durations are briefly discussed. A number of biophysical and biomedical applications of the new sources, currently considered among the most promising in the field, are presented.
Źródło:
Acta Physica Polonica A; 2010, 117, 2; 427-432
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optical Properties of the (3,12,12) Hexagonal Archimedean Photonic Crystal
Autorzy:
Jovanović, Ð.
Gajić, R.
Hingerl, K.
Powiązania:
https://bibliotekanauki.pl/articles/1795628.pdf
Data publikacji:
2009-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.70.Qs
61.50.Ah
41.20.Jb
42.25.Bs
42.25.Gy
Opis:
We present a theoretical research of the optical properties of the (3,12,12) hexagonal 2D Archimedean photonic crystals. The structures are made of GaAs dielectric rods in air. Our research is mainly focused on analyzing symmetry properties of the modes and the appearance of the uncoupled modes which strongly affects the propagation of the wave and the optical performances of the material.
Źródło:
Acta Physica Polonica A; 2009, 116, 4; 642-644
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Intersection Dimension and Graph Invariants
Autorzy:
Aravind, N.R.
Subramanian, C.R.
Powiązania:
https://bibliotekanauki.pl/articles/32083820.pdf
Data publikacji:
2021-02-01
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
circular dimension
dimensional properties
forbidden-subgraph colorings
Opis:
We show that the intersection dimension of graphs with respect to several hereditary properties can be bounded as a function of the maximum degree. As an interesting special case, we show that the circular dimension of a graph with maximum degree Δ is at most \(O\Big(\Delta\frac{log\Delta}{log log\Delta}\Big)\). It is also shown that permutation dimension of any graph is at most $\Delta(log \Delta)^{1+o(1)}$. We also obtain bounds on intersection dimension in terms of treewidth.
Źródło:
Discussiones Mathematicae Graph Theory; 2021, 41, 1; 153-166
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Gamma Radiation Absorption Characteristics of Concrete with Components of Different Type Materials
Autorzy:
Stanković, S.
Ilić, R.
Janković, K.
Bojović, D.
Lončar, B.
Powiązania:
https://bibliotekanauki.pl/articles/1537948.pdf
Data publikacji:
2010-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
28.41.Qb
29.25.Rm
29.27.Eg
29.85.-c
Opis:
Nuclear facilities as nuclear power stations, nuclear research reactors, particle accelerators and linear accelerator in medical institution using concrete in building construction. The different type materials of the aggregate as component of concrete were analyzed to provide radiation protection. The energy deposited the transmission factor and the mass attenuation coefficients in ordinary and barite concretes have been calculated with the photon transport Monte Carlo software. The numerical simulations results show that using barite as an aggregate in the concrete is one of the solutions for gamma ray shielding. Thereat, it is shown non-destructive method for determining the gamma radiation absorption characteristics of concrete.
Źródło:
Acta Physica Polonica A; 2010, 117, 5; 812-816
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling the Variable Angle Reflection and Transmission from Metamaterial Slabs
Autorzy:
Isić, G.
Vasić, B.
Mirić, M.
Jokanović, B.
Bergmair, I.
Gajić, R.
Hingerl, K.
Powiązania:
https://bibliotekanauki.pl/articles/1795623.pdf
Data publikacji:
2009-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
41.20.-q
42.25.Bs
42.70.Qs
Opis:
We consider metamaterial slabs composed of perfectly conducting split-ring resonators. Assuming bianisotropic constitutive relations, we describe an S-parameter retrieval method that allows us to obtain the full material parameter tensors from numerically calculated S parameters. The retrieval has been done for various angles of incidence, ranging from 0° to 75°. It has been found that the parameters depend on the angle of incidence, but that this dependence is relatively small.
Źródło:
Acta Physica Polonica A; 2009, 116, 4; 631-634
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ultrabright Synchrotron Source ELETTRA: First Period of Operation
Autorzy:
Margaritondo, G.
Savoia, A.
Bernstoff, S.
Bertolo, M.
Comelli, G.
De Bona, F.
Jark, W.
Kiskinova, M.
Paolucci, G.
Prince, K.
Santaniello, A.
Tromba, G.
Walker, R.
Rosei, R.
Powiązania:
https://bibliotekanauki.pl/articles/1963301.pdf
Data publikacji:
1997-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
41.60.Ap
79.60.-i
Opis:
ELETTRA, the brightest source of soft-X-ray in Europe and one of the two brightest in the world, is officially operating as a user facility since the summer of 1995. The source and the operating beam lines have reached and surpassed the design performances. The impact of such performances is already felt in experiments: new applications are possible which were very difficult or quite impossible with the previous generation of sources. We present a few specific results to illustrate this point, and some considerations on the future development of the facility - primarily in view of its large and rapidly growing international use.
Źródło:
Acta Physica Polonica A; 1997, 91, 4; 631-640
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Arktyka dla MiG-ów
Autorzy:
Łuczak, Wojciech (wydawca).
Powiązania:
Raport. Wojsko - Technika - Obronność 2021, nr 6, s. 18-20
Data publikacji:
2021
Tematy:
Lotnictwo wojskowe
Samoloty bojowe
Samoloty myśliwskie
MiG-31 (samolot)
MiG-41 (samolot)
Projekty
R-73 (pocisk rakietowy)
Artykuł z czasopisma fachowego
Artykuł z czasopisma wojskowego
Opis:
Artykuł dotyczy projektu przyszłego rosyjskiego myśliwca przechwytującego dużego zasięgu – PAK-DP, znanego także jako MiG-41. Obecnie terytorium Arktyki (Północnej Drogi Wodnej) patrolują myśliwce MiG-31, modernizowane do standardu BM. Opisano zadania i wymagania stawiane nowemu myśliwcowi oraz etapy prac nad prototypem.
Dostawca treści:
Bibliografia CBW
Artykuł
Tytuł:
Controlled Porosity of MCM-41 Obtained by Partial Blocking of Pores by Silicon Oil
Autorzy:
Gorgol, M.
Krasucka, P.
Goworek, J.
Zaleski, R.
Powiązania:
https://bibliotekanauki.pl/articles/1033928.pdf
Data publikacji:
2017-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.70.Bj
36.10.Dr
61.43.Gt
68.43.-h
Opis:
Partial blocking of mesopores in the ordered MCM-41 silica by DC550 silicon oil was proposed as a preparation method of the material with controlled porosity and fixed pore size. The porosity of the samples with various content of DC550 was examined with the use of low temperature nitrogen sorption and positron annihilation lifetime spectroscopy. It was shown that the oil blocks the primary pores by forming the plugs near its entrances, but also partially locates in the interparticle spaces. The comparison of the results obtained from both investigation techniques was used to make the first attempt to obtain the calibration of ortho-positronium intensity, depending on pore volume. This is necessary to improve the utility of positron annihilation lifetime spectroscopy as a porosimetric technique. The need to take the migration of positronium to larger free volume into account is discussed.
Źródło:
Acta Physica Polonica A; 2017, 132, 5; 1559-1563
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of Earths Magnetic Field on the HF Radio Wave Modes at the Heated Subionosphere
Autorzy:
Canyilmaz, M.
Atici, R.
Guzel, E.
Powiązania:
https://bibliotekanauki.pl/articles/1400161.pdf
Data publikacji:
2013-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
94.20.Bb
94.20.ws
94.20.wj
41.20.Jb
84.40.-x
Opis:
In this study, the effect of the actual geometry of the magnetic field on the electron temperature has been investigated daily and seasonally for the electromagnetic wave travelling at subionosphere. The electron energy balance equation has been obtained by using the ideal gas approximation. The results show that there are notable differences between the two situations (B ∥ k ∥ z and B real, ∥ z). According to our theoretical study, the maximum changes are shown at L- and R-mode, small effect on X-mode and no variation on O-mode due to the real geometry of the magnetic field. Besides, the heights of the maximum points are changeable daily and seasonally for all modes at the subionosphere.
Źródło:
Acta Physica Polonica A; 2013, 123, 4; 786-790
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Variation of magnetic fluid deformation related to nanoparticle concentration in steady electric field
Autorzy:
Kosterec, M.
Kurimský, J.
Cimbala, R.
Špes, M.
Farkaš, R.
Dolník, B.
Gamcová, M.
Rajňák, M.
Timko, M.
Kopčanský, P.
Paulovičová, K.
Vargová, B.
Powiązania:
https://bibliotekanauki.pl/articles/1048186.pdf
Data publikacji:
2018-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
47.65.Cb
41.20.-q
47.55.D-
Opis:
Today, it is important to know the behaviour of magnetic fluids applied in the power electrical machines, e.g. in power transformers, when exposed to an electric field. Besides their promising applications in high voltage engineering, they are of increasing interest from designed assembly and pattern formation point of view. The structure of such magnetic fluids is easily controllable by external magnetic fields. However, less attention has been paid to structural phenomena in magnetic fluids induced by electric fields. The core of this paper is dedicated to the experimental observation of a magnetic fluid droplet deformation in a steady electric field. The mutual relation between the deformation parameter and magnetic nanoparticles concentration is analysed. Spatio-temporal analysis of the droplet shape is presented in the paper. The phenomena of the droplet deformation were recorded by a camera. The detailed experimental procedure is presented. The method of deformation parameter calculation based on the linear pixel as the smallest-size unit in digital image is written. Finally, the relation between the deformation parameter and the nanoparticle volume concentration, as well as the time and magnitude of the DC field application are thoroughly evaluated. The results show that the deformation parameter decreases with increasing concentration at constant applied steady electric field but increases with increasing applied steady electric field.
Źródło:
Acta Physica Polonica A; 2018, 133, 3; 570-573
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Odpady energetyczne jako substraty w syntezie materiałów mezoporowatych
Energy wastes as a substrate in the synthesis of mesoporous materials
Autorzy:
Stożek, B.
Panek, R.
Kunecki, P.
Wdowin, M.
Powiązania:
https://bibliotekanauki.pl/articles/394011.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
Tematy:
popiół lotny
materiały mezoporowate
MCM-41
fly ash
mesoporous materials
Opis:
Krzemianowe materiały mezoporowate znajdują coraz większe zastosowanie w inżynierii i ochronie środowiska m.in. jako sorbent ditlenku węgla w procesach wychwytywania tego gazu na potrzeby CCS ( Carbon Capture and Storage ). Jednak ich produkcja z odczynników chemicznych jest kosztowna i nieopłacalna. Dlatego też w pracy zbadano możliwość wykorzystania do syntez materiałów mezoporowatych produktów odpadowych, tj. popiołów lotnych klasy F powstających w wyniku spalania węgla kamiennego metodą konwencjonalną. Na wytypowanym do badań materiale popiołowym przeprowadzono serię dwustopniowych reakcji mających na celu otrzymanie materiału mezoporowatego typu MCM-41. Uzyskany produkt reakcji poddano analizom mineralogicznym (XRD, SEM-EDS), chemicznym (XRF) i teksturalnym (powierzchnia właściwa BET, rozkład, objętość i wielkość porów). Analizy mineralogiczne XRD wykazały, że na krzywej dyfrakcyjnej składu mineralnego, w zakresie niskokątowym, obserwuje się charakterystyczne dla materiału MCM-41 refleksy dla odległości międzypłaszczyznowych d = 41,1 Å oraz d = 23,5 Å. W badaniach SEM zaobserwowano sferyczne formy dla otrzymanego produktu syntezy. W swoim składzie chemicznym posiada on ponad 87% krzemionki. Natomiast z analiz teksturalnych wynika, że otrzymany materiał jest mezoporowaty i posiada bardzo wysoką powierzchnię właściwą ponad 800 m 2 /g, z kolei średnia średnica porów wyniosła 90 Å. Na podstawie otrzymanych wyników stwierdzić można, że w reakcji syntezy otrzymano materiał typu MCM-41, w związku z czym badany popiół może stanowić substrat do syntez materiałów mezoporowatych.
Mesoporous silica materials are increasingly used in engineering and environmental protection, among others, as sorbents of carbon dioxide in the capture process of this gas for the purpose of CCS (Carbon Capture and Storage). However, their production by means of chemicals is expensive and unprofitable. Therefore, the study presents a consideration of the possibility of using mesoporous materials synthesis with waste products, i.e. Class F fly ash resulting from the combustion of coal in a conventional manner. A series of two-step reactions were carried out using the selected fly ash materials in order to obtain mesoporous MCM-41material. The resulting reaction product was subjected to mineralogical (XRD, SEM-EDS), chemical (XRF) and textural (BET specific surface area, distribution, volume and pore size) analysis. The mineralogical analysis indicated that material reflections coming from interplanar distance d = 41.1 Å and d = 23.5 Å are observed on the diffraction curves of mineral composition at low angle range, typical for the MCM-41. From the SEM analysis it is observed spherical grain forms from the obtained synthesis product. The chemical com- position analysis of mesoporous materials has shown over 87% silica. From textural analyses, it is apparent that the resulting material is mesoporous and has a very high specific surface area above 800 m 2 /g, whereas the average pore diameter is 90 Å. Based on the obtained results, it can be concluded that the synthesized reaction material was MCM-41, therefore it can be inferred that the tested fly ash can provide a substrate for synthesis of mesoporous materials.
Źródło:
Zeszyty Naukowe Instytutu Gospodarki Surowcami Mineralnymi i Energią PAN; 2016, 92; 163-169
2080-0819
Pojawia się w:
Zeszyty Naukowe Instytutu Gospodarki Surowcami Mineralnymi i Energią PAN
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
High-Frequency Absorbing Performances of Carbonyl Iron/MnZn Ferrite/PVC Polymer Composites
Autorzy:
Dosoudil, R.
Ušáková, M.
Powiązania:
https://bibliotekanauki.pl/articles/1032831.pdf
Data publikacji:
2017-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Gg
75.50.Bb
76.50.+g
75.78.-n
72.80.Tm
78.20.Ci
41.20.Jb
Opis:
We have prepared composite materials with a mixture of carbonyl iron (CI) and manganese-zinc ferrite (MnZn) as filler and polyvinylchloride (PVC) as polymer matrix, and then electromagnetic wave absorption properties of CI/MnZn/PVC composites have been studied in the frequency range from 10 MHz to 6.5 GHz. Increasing carbonyl iron loading (to the detriment of MnZn ferrite) results in the rise of permeability and magnetic resonance loss (especially in GHz frequency range) which leads to the shift of absorption peak towards lower frequency and to the decrease of matching thickness. On the contrary, increasing MnZn ferrite loading (to the detriment of carbonyl iron) results in higher absorption bandwidth. The obtained results indicate that the prepared flexible composites may be useful as thin and/or wideband microwave absorbers.
Źródło:
Acta Physica Polonica A; 2017, 131, 4; 687-689
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structural Identification of Polymer Nanocomposites
Autorzy:
Bilewicz, M.
Labisz, K.
Tański, T.
Konieczny, J.
Górniak, M.
Powiązania:
https://bibliotekanauki.pl/articles/1375121.pdf
Data publikacji:
2014-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
36.20.-r
61.41.+e
81.20.-n
81.40.Gh
81.40.Lm
81.70.-q
81.70.Bt
82.35.-x
Opis:
Composites and nanocomposites as commercially used engineering materials with continuous development, are important for rising market and industry needs. Significant role is played by polymers, whose consumption increases every year, thanks to low cost of production, economical processing and broad scope of material composition possibilities, including nanomaterials and basing on them nanocomposites. Nanocomposites, using power of nanotechnology, may improve physical, chemical and mechanical properties, comparing to composites. Investigation of structure and properties of such materials is necessary to obtain knowledge about phenomena at micro and nanoscale and gives opportunity to design and control structure, because the properties of any material depend on its matter. Polymer matrix nanocomposites are interesting and very promising class of polymer composites. Investigation of structure development due to different heat treatment and under different processing condition of injection molded specimens of polypropylene and montmorillonite composition has been performed. Dispersion of nanoreinforcement, in the shape of 2:1 layer silicates, was observed under transmission and scanning electron microscope. Application of advanced technology of multiplication of oriented layer mostly reinforcing and orienting micro and nanoparticles along polymeric specimen, allowed to obtain several layers and significantly reinforced material. Light microscope has been used for observation layered zone, visible just in polarization mode.
Źródło:
Acta Physica Polonica A; 2014, 126, 4; 895-901
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anatomia aliteracji. J.R.R. Tolkien jako tłumacz poematu Pan Gawen i Zielony Rycerz
Anatomy of alliteration. J.R.R. Tolkien as a translator of the poem Sir Gawain and the Green Knight
Autorzy:
Markiewka, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/29520325.pdf
Data publikacji:
2023-12-18
Wydawca:
Uniwersytet Bielsko-Bialski
Tematy:
aliteracja
przekład poezji
J.R.R. Tolkien
Pan Gawen i Zielony Rycerz
alliteration
poetry translation
Sir Gawain and the Green Knight
Opis:
The article presents a short comparative analysis of two versions of the English ro mance in verse Sir Gawain and the Green Knight – the original text from the 14th century and its modern translation by J.R.R. Tolkien. The Middle English source text uses a North-West English dialect and is an interesting example of a late revival of alliteration originally rooted in the old English tradition. Alliteration as a formal organizing principle is combined with end-rhymes which complete the structure of the poem; this is both sophisticated and rare. Tolkien’s modern rendition of the romance recognizes and respects its dominant structural elements and attempts to recreate all the formal aspects of the text as adequately as possible. The modern version, while being a translation, acquires the semi-authorial signature of Tolk ien, both a translator and scholar who creates a highly competent and historically informed rendition. The translator’s craft is particularly visible when Tolkien’s ver sion is juxtaposed with the Polish translation by Andrzej Wicher. The linguistic and cultural distance between Polish and English is larger than the distance between the original and the modern rendition in English, and, as a result, the translation of Andrzej Wicher manages to reproduce only a limited number of alliterations and hence loses many artistic features that were essential components of the original text.
Źródło:
Świat i Słowo; 2023, 41, 2; 51-69
1731-3317
Pojawia się w:
Świat i Słowo
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Powstanie Warszawskie 1944 medalami pisane
Autorzy:
Abramek, Zdzisław (1927-2006).
Współwytwórcy:
Faberski, Jan. Recenzja
Data publikacji:
2003
Wydawca:
Bydgoszcz : Związek Powstańców Warszawskich w Bydgoszczy
Tematy:
Różycki, Tadeusz
Grenda, Kazimierz
Grenda Kazimierz (1906-1959) biografia
Górecki, Przemysław
Harcerska Poczta Polowa Warszawa sierpień-wrzesień 1944 r.
Warszawa. Tablica Pamięci Harcerskiej Poczty Polowej ul. Wilcza 41
Medale pamiątkowe łączność Polska 1944-2002 r. spis
Powstanie warszawskie (1944)
Łączność
Opis:
S. 287-294, Harcerska Poczta Polowa.
Bibliogr. s. 370-374. --- Indeks.
Rec.: Powstanie Warszawskie 1944 medalami pisane / Jan Faberski.
Dostawca treści:
Bibliografia CBW
Książka
Tytuł:
Nutritional composition and bioactive compounds in a local grape variety Vitis Vinifera L. cultivated in Morocco
Autorzy:
Kalili, A.
El Ouafi, R.
Aboukhalaf, A.
Naciri, K.
Tbatou, M.
Moujabbir, S.
Belahyan, A.
Belahsen, R.
Powiązania:
https://bibliotekanauki.pl/articles/28765379.pdf
Data publikacji:
2023
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Opis:
Background. The vine is considered one of the most important and popular fruits in the world thanks to its high nutritional value and high fiber content. Objective. This study aim was to evaluate the nutritional composition in a local variety ‘Doukkali’ grape (Vitis vinifera L.) in the perspective of their suitability for pharmaceutical and agri-food use. Material and methods. The proximate composition and minerals were determined using AOAC methods, the total sugar by HPLC method. The total phenolic compounds using the Folin-Ciocalteu reagent, the total flavonoids using aluminum chloride colorimetric method and tannins by the method of vanillin. Results. The analysis of the raisin of this variety revealed a high carbohydrate content of 61% with high levels of glucose (31.6%), fructose (30.4%), dietary fiber (13.92%) and minerals including potassium (445.50 mg/100 g DM), calcium (193.26 mg/100 g DM), sulfur (171.63 mg/100 g DM), sodium (137.50 mg/100 g DM), phosphorus (99.79 mg/100 g DM), magnesium (54.74 mg/100 g DM) and iron (2.39mg/ g DM). Analysis of bioactive compounds showed significant content of polyphenols varying from 43 to 309.1 mg GAE/g DM, flavonoids from 1.0 to 23.8 mg CEQ/g DM and tannins from 2.5 to 50.45 mg TAE/g DM. Conclusions. The study shows that the local variety of Doukkali grape has an important nutritional potential that can contribute to the nutritional needs and the fight against malnutrition as well as to the dietary diversity of the local population.
Źródło:
Roczniki Państwowego Zakładu Higieny; 2023, 74, 1; 41-48
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Decomposition of the Tensor Product of Complete Graphs into Cycles of Lengths 3 and 6
Autorzy:
Paulraja, P.
Srimathi, R.
Powiązania:
https://bibliotekanauki.pl/articles/32083831.pdf
Data publikacji:
2021-02-01
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
cycle decomposition
tensor product
Opis:
By a \(\{C_3^α, C_3^β\}\)-decomposition of a graph $G$, we mean a partition of the edge set of $G$ into $\alpha$ cycles of length 3 and $\beta$ cycles of length 6. In this paper, necessary and sufficient conditions for the existence of a \(\{C_3^α, C_3^β\}\)-decomposition of $(K_m × K_n)(\lambda)$, where $×$ denotes the tensor product of graphs and $\lambda$ is the multiplicity of the edges, is obtained. In fact, we prove that for $\lambda ≥ 1, m, n ≥ 3$ and $(m, n) ≠ (3, 3)$, a \(\{C_3^α, C_3^β\}\)-decomposition of $(Km × Kn)(\lambda)$ exists if and only if $\lambda(m − 1)(n − 1) ≡ 0 (mod 2)$ and \(3\alpha+6\beta=\frac{\lambda m(m-1)n(n-1)}{2}\).
Źródło:
Discussiones Mathematicae Graph Theory; 2021, 41, 1; 249-266
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ultrafast Dynamics of Photoinduced Electronic Phase Modulation in Ladder Cuprate of $Sr_{14 - x}Ca_{x}Cu_{24}O_{41}$
Autorzy:
Fukaya, R.
Kunitomo, M.
Okimoto, Y.
Ishikawa, T.
Onda, K.
Koshihara, S.
Yui, H.
Sasagawa, T.
Powiązania:
https://bibliotekanauki.pl/articles/1489955.pdf
Data publikacji:
2012-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.47.-p
74.72.-h
78.20.-e
Opis:
Ultrafast carrier dynamics caused by photoexcitation in quasi-one-dimensional two-leg ladder cuprate $Sr_4Ca_{10}Cu_{24}O_{41}$ was investigated by the femtosecond reflection spectroscopy. After the photoexcitation along the leg direction, the transient reflectivity changes (Δ R/R) in the mid-infrared region showed instant decrease within 150 fs. The suppressed Δ R/R increased so rapidly on the picosecond time scale that the reflectivity value finally became larger than that in the initial state. Such a successive response in Δ R/R, which was also observed in other photon energy regions, is discussed in terms of ultrafast variation of the Drude weight in the ladder system by the photoirradiation.
Źródło:
Acta Physica Polonica A; 2012, 121, 2; 310-312
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Temperature and Pressure Dependence of the Free Volume in Fluoroelastomers from PALS and PVT Experiments
Autorzy:
Dlubek, G.
Sen Gupta, A.
Wawryszczuk, J.
Kilburn, D.
Pionteck, J.
Krause-Rehberg, R.
Goworek, T.
Alam, M. A.
Kaspar, H.
Lochhaas, K. H.
Powiązania:
https://bibliotekanauki.pl/articles/2042202.pdf
Data publikacji:
2005-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.41.+e
78.70.-g
Opis:
Positron lifetime and pressure-volume-temperature experiments were performed as function of T (100-485 K) and P (10$\text{}^{-5}$ Pa-500 MPa) on a fluoroelastomer. From positron annihilation lifetime spectroscopy, analyzed with LT9.0 assuming a dispersion in the e$\text{}^{+}$ (τ$\text{}_{2}$) and o-Ps (τ$\text{}_{3}$) lifetime, the mean, 〈v$\text{}_{h}$〉, and the width (standard deviation), σ$\text{}_{h}$, of the hole size distribution were calculated. The pressure-volume-temperature data were analyzed using the Simha-Somcynsky hole-lattice theory to estimate the specific hole free volume V$\text{}_{f}$. From a comparison of V$\text{}_{f}$ with 〈v$\text{}_{h}$〉 the specific hole number, N'$\text{}_{h}$, is estimated. The data from thermal expansion and pressure experiments show complete agreement when taking into account the compressibility of the occupied volume.
Źródło:
Acta Physica Polonica A; 2005, 107, 4; 685-689
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
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