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Wyświetlanie 1-15 z 95
Tytuł:
Operationally complete work done suggests presence of extra potentials corresponding to repulsive forces
Autorzy:
Czajko, J.
Powiązania:
https://bibliotekanauki.pl/articles/411658.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Nonradial potential energy
work done
repulsive potential of gravity
Opis:
Operationally complete representation of work done and the corresponding to it potential energy within the usual radial/center-bound, nonrotating gravitational force fields comprises two extra terms: linear nonradial and angular nonradial, in addition to the usual radial term. Since these nonradial terms have negative signs, they suggest presence of potentials corresponding to repulsive forces generated by the very same, usual radial attractive force field. The extra linear nonradial term depends on exposure of an orbiting satellite to the distribution of mass within the field, whereas the extra angular nonradial term also depends on that as well as on exposure of the satellite to density of matter of the mass source that generates the usual, locally dominant radial/center-bound attractive gravitational force field.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 18; 16-30
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Energy – conversion, conservation and management
Autorzy:
Badur, J.
Powiązania:
https://bibliotekanauki.pl/articles/175468.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
internal
kinetic and potential energy
energy fluxes
energy conservation
energy conversion
Opis:
Energy is an abstract notion that helps to understand the nature and contributes to the creation of the civilization. The energy notion has a huge meaning not only due to practical reason – it is essential for economy and philosophy too. It turns out that in Hellenic philosophy, and especially in its fundamental part, i.e., metaphysics, there is no place for the concepts and methods of reasoning developed by physics and chemistry. Philosophy assumes that most of the physical and chemical concepts are not known in nature in spe these are employed by science only as a kind of mental keys (qualitative occultea) for the description and understanding of the universe. The concept of energy is only one example of a notion accepted both by the philosophers (in its metaphysical sense) and physicians (in its descriptive role).
Źródło:
Transactions of the Institute of Fluid-Flow Machinery; 2015, 127; 27-43
0079-3205
Pojawia się w:
Transactions of the Institute of Fluid-Flow Machinery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Energy saving system for off-road machines by the use of the movable counterweight energy recuperation
Autorzy:
Gawlik, A.
Powiązania:
https://bibliotekanauki.pl/articles/242216.pdf
Data publikacji:
2014
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
active counterweight
excavator
homothetic transformation
energy saving
potential energy recuperation
Opis:
In this paper, concept of energy saving by the use the special recuperation system for hydraulic excavator is studied. This solution is alternative to commercial projects of hybrid systems, which store energy in the hydro pneumatic accumulators or the super capacitors. Suggested solution includes designed system of active counterweight, which cooperates with working mechanism of machine. The hydraulic circuit of active counterweight is connected with the boom standard hydraulic system. The counterweight mechanism is homothetic to working mechanism of the excavator. The homothetic transformation applies to kinematical structure and positions of the centres of gravity. The homothetic transformation provides to static unloading of boom cylinder by the connected counterweight cylinder. The possibility of energy saving by using movable counterweight was estimated during tests. The key parameters of hydraulic system, such as: cylinders velocity, working pressure, oil flow and another were measured on prepared research stand. The comparison of power consumption for standard and modification system during the same work cycles allowed confirms the correctness of the suggested concept for energy saving system. Energy saving ratios for modified hydraulic circuit was calculated for different velocity of boom cylinder and payloads. The active counterweight system for low velocity cylinder of excavator mechanism is ready to application. The hydraulic circuit for higher value of boom cylinder velocity requires resize a few elements for example supply lines.
Źródło:
Journal of KONES; 2014, 21, 3; 105-112
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Equalized mass can explain the dark energy or missing mass problem as higher density of matter in stars amplifies their attraction
Autorzy:
Czajko, Jakub
Powiązania:
https://bibliotekanauki.pl/articles/1179255.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Equalized mass; complete total potential energy; dark matter/energy; missing mass
Opis:
In order to compare properties of celestial bodies regardless of their motions, their masses, which represent also their energy spent on resistance to forced motions, should be expressed with respect to the same (for all of them) material substance, such as water, for instance. Then their density of matter, which has been defined as the ratio of their actual mass/bulk to an equivalent mass of water, should also be taken into account even in the radial Newtonian law of gravitation. Such an equalized mass adheres to the Newton’s definition of “quantity of matter” as conjoined feature (i.e. product) of matter density and the bulk=mass of the body, even though he has never really operated on the notion so defined. The equalized mass conforms to the Einstein’s concept of mass as equivalent of energy, both of which vary with speed. Hence the product of equalized mass and density of matter can increase the radial gravitational force of very dense stars, easing the problem of the allegedly missing mass that pushes galaxies too far away according to former estimates of their masses and their distances. Besides the equalized mass, the need for which has emerged from presence of nonradial potentials acting along paths on equipotential surfaces in radial/center-bound force fields, the repulsive effects of the nonradial angular potentials can also amplify the regular/innate spins of stars, black holes and galaxies, eliminating thus the need for the so-called dark matter/energy invented just to explain the allegedly missing mass/energy.
Źródło:
World Scientific News; 2017, 80; 207-238
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of viscous-elastic properties of a cylindrical sealing element on its sealing ability
Autorzy:
Abbasov, Elkhan
Rustamova, Kaklik
Darishova, Aynur
Powiązania:
https://bibliotekanauki.pl/articles/2055051.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
contact pressure
sealing element
boundary condition
potential energy
functional
Opis:
The stress-strain state of a sealing element in the form of a hollow cylinder is defined with regard to viscous-elastic properties of its material. Based on linear laws of heredity, an analytical formula allowing one to determine the axial load necessary for tightness of the surface of the sealing element and the cylinder wall depending on its physic-mechanical properties and geometrical dimensions is found. Influence of viscous-elastic properties of the material of the sealing element on its sealing ability is realized based on the hypothesis of elastic analogy. The results of numerical calculations are represented in the form of graphs of the external force necessary for achieving sightless. It is shown that viscous-elastic properties of the sealer material greatly influence its sealing ability. Because of heredity of the sealer material, values of the external forces drop in some cases by about five times.
Źródło:
Journal of Theoretical and Applied Mechanics; 2021, 59, 3; 481--492
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Linear magnitudes estimated via expense of incompletely defined potential energy were likely overestimated by over 3.48 %
Autorzy:
Czajko, J.
Powiązania:
https://bibliotekanauki.pl/articles/412296.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
potential energy
work done
linear magnitudes
nonradial angular effects
Opis:
Since former definition of work done by any radial/center-bound (central) force field (and consequently thus also of the corresponding to it expense of potential energy of the field) was incompletely defined (so that these two basic notions were valid only for purely radial phenomena), some indirect estimations of those linear magnitudes that relied on the former (incomplete yet always presumed as total) potential energy may have been overestimated. New, operationally complete and thus mathematically lawful definition of total rate of work done by the field implies presence of a certain (experimentally observed but formerly quite unanticipated and thus routinely unaccounted for) nonradial angular contribution to the total potential energy. Hence some previous calculations of those linear magnitudes, which were indirectly estimated via expense of potential energy spent on the work done, may have been quite inadvertently overrated by over 3.48 %. This was because the extra potential energy that is spent on twisting the path that is deflected by the source of the field was disregarded in the former, incomplete definition of work done, even though such nonradial twisting is generally required by proven Frenet-Serret formulas of differential geometry. This present assessment is based upon purely mathematical premises, but similar prior nonradial angular formula utilized here has already retrodicted the 10.56 % excess over Einstein‟s prediction of deflection of light that was observed in several unbiased experiments, and it has reconciled some other experiments that could neither be explained nor reconciled by general theory of relativity, which, as radial by design, does not account for nonradial or mixed phenomena.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 13, 1; 32-41
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Galilei was wrong: Angular nonradial effects of radial gravity depend on density of matter
Autorzy:
Czajko, J.
Powiązania:
https://bibliotekanauki.pl/articles/412636.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
potential energy
work done
nonradial gravitational effects
density of matter
Opis:
Although in mathematical sense the actual meaning of Galilei‟s experiments conducted at leaning tower of Pisa is that he failed to detect any measurable impact of composition of matter on gravitating bodies, the obvious failure is mistakenly interpreted as experimental confirmation of lack of the impact instead. Galilei did not really perform internal validity checks of his experiments, because he did not ensure that he actually measured what he was supposed to measure. However, a modern experiment devised to test the impact of large mass on gravitational phenomena has revealed presence of (formerly unanticipated) extraneous frequency decrease in rays coming from Taurus A, when they passed close to our Sun (i.e. near occultation). The experiment has effectively confirmed that density of matter of the mass source of locally dominant gravitational field (which was our Sun‟s field) affects gravitational interactions happening on equipotential surfaces surrounding gravity center of the field. Also very similar experiment involving radio waves, which too exhibited (formerly unexpected) frequency decrease when they traveled along practically equipotential surface of Earth, has reaffirmed that conclusion. Hence contrary to Galilei, effects of nonradial (i.e. tangential and/or binormal) components of radial gravitational force fields depend (inversely) on (equipotential exposure to) the, assumed as practically constant and uniformly distributed, density of matter of the mass source of the local field.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 11, 2; 89-105
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of determination methods of vibrations damping coefficients for complex structures
Autorzy:
Flaga, A.
Szulej, J.
Wielgos, P.
Powiązania:
https://bibliotekanauki.pl/articles/390348.pdf
Data publikacji:
2008
Wydawca:
Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
Tematy:
damping
potential energy method
kinetic energy method
collocation method
half-power bandwidth method
Opis:
The purpose of this paper is to present methods of vibrations damping coefficient determination. The methods, such as collocation method, two energetic methods and half-power bandwidth method concern composite structures. The verification of methods has been taken into account in this work. Two real compound models and two numerical models have been created. Time series of vibrations of these models have been measured and calculated. The comparison of four methods has been made on the basis of obtained results.
Źródło:
Budownictwo i Architektura; 2008, 3, 2; 53-61
1899-0665
Pojawia się w:
Budownictwo i Architektura
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Potential Energy Surface (PES) scan of gas-phase L-proline
Autorzy:
El Guerdaoui, A.
El Kahoui, Y.
Bourjila, M.
Tijar, R.
El Gridani, A.
Powiązania:
https://bibliotekanauki.pl/articles/412094.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
ab initio calculations
L-proline
density functional theory
potential energy surface
Opis:
We performed here a systematic ab initio calculations on neutral gas-phase L-proline. A total of 8 local minima were located by geometry optimization of the trial structures using density functional theory (DFT) with B3LYP three parameter hybrid potential coupled with the 6-31G)d( basis set. The absolute minimum obtained will be subject to a rigid potential energy surface (PES) scan by rotating its carboxylic group using the same method with more accurate basis set B3LYP/6-311++G(d,p), to get a deeper idea about its conformational stability. The main aim of the present work was the study of the rigidity of the L-proline structure and the puckering of its pyrrolidine ring.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 19, 1; 26-34
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measurement of the Indentation Modulus and the Local Internal Friction in Amorphous SiO2 Using Atomic Force Acoustic Microscopy
Autorzy:
Zhang, B.
Wagner, H.
Büchsenschütz-Göbeler, M.
Luo, Y.
Küchemann, S.
Arnold, W.
Samwer, K.
Powiązania:
https://bibliotekanauki.pl/articles/352901.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
amorphous materials
potential energy landscape
internal friction
atomic force acoustic microscopy
Opis:
For the past two decades, atomic force acoustic microscopy (AFAM), an advanced scanning probe microscopy technique, has played a promising role in materials characterization with a good lateral resolution at micro/nano dimensions. AFAM is based on inducing out-of-plane vibrations in the specimen, which are generated by an ultrasonic transducer. The vibrations are sensed by the AFM cantilever when its tip is in contact with the material under test. From the cantilver’s contactresonance spectra, one determines the real and the imaginary part of the contact stiffness k*, and then from these two quantities the local indentation modulus M' and the local damping factor Qloc-1 can be obtained with a spatial resolution of less than 10 nm. Here, we present measured data of M' and of Qloc-1 for the insulating amorphous material, a-SiO2. The amorphous SiO2 layer was prepared on a crystalline Si wafer by means of thermal oxidation. There is a spatial distribution of the indentation modulus M' and of the internal friction Qloc-1. This is a consequence of the potential energy landscape for amorphous materials.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 1; 9-12
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation to the influence of additional magnets positions on four-magnet bi-stable piezoelectric energy harvester
Autorzy:
Li, Xinxin
Huang, Kexue
Li, Zhilin
Xiang, Jiangshu
Huang, Zhenfeng
Mao, Hanling
Cao, Yadong
Powiązania:
https://bibliotekanauki.pl/articles/2173633.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
bistable
piezoelectric energy harvesting
nonlinear dynamic
potential energy
układ bistabilny
dynamika nieliniowa
energia potencjalna
zbieranie energii piezoelektrycznej
Opis:
To enhance the harvesting performance of a bi-stable piezoelectric energy harvester (BEH), this work proposes a four-magnet BEH (FBEH). FBEH consists of a piezoelectric cantilever beam with a tip magnet, a fixed magnet and two movable magnets. The two movable magnets relative to the fixed magnet can move in both horizontal and vertical directions. A nonlinear distributed parameter model of FBEH is derived through the Hamilton principle. The effects of the excitation frequency and amplitude as well as the horizontal and vertical gap on the harvesting performance are mainly investigated by using the bifurcation diagram, phase diagram, Poincaré map and output power. Numerical simulations demonstrate that the proposed FBEH decreases the potential barrier and creates a higher than typical bi-stable one when subjected to lower excitation amplitudes and frequencies.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2022, 70, 1; art. no. e140151
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Potencjał energetyczny substratów roślinnych pochodzących z nieużytków drogowych
The biogas potential of plant feedstock
Autorzy:
Dudek, M.
Grala, A.
Zieliński, M.
Dębowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/1819443.pdf
Data publikacji:
2011
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
potencjał energetyczny
substraty roślinne
energy potential
plant substrates
Opis:
Uzyskane wyniki wielkości produkcji oraz składu biogazu, powstającego podczas fermentacji metanowej substratu roślinnego pochodzącego z nieużytków przydrożnych wskazują na potencjalna możliwość wykorzystania tego źródła biomasy. Średnio uzyskiwano biogaz w ilości 0,354 l/gs.m. (354 m3/t) przy zawartości metanu około 56,5%. Biorąc pod uwagę iż w większości miast w naszym kraju prowadzi się regularne okresowe koszenie terenów zielonych w miastach można wykorzystywać pozyskiwany materiał jako wsad do lokalnych biogazowni. Koszona trawa jest zbierana i wywożona, koszt związany z tą operacją jest więc ponoszony niezależnie od tego, czy substrat zostanie wykorzystany czy nie.
The paper presents the results of research on the quantity and quality of biogas produced in the process of methane fermentation of vegetable substrates from road barrens. The study used a mixture of waste collected along one of the streets in Olsztyn. The waste included in its composition the fallen leaves of roadside trees, especially poplar italian (Populus nigra) and linden (Tilia europaea) and roadside grasses. In order to efficiently process the collected material it was grinded to particle size of 2 mm using Robot Coupe Blixer. Then for each sample the analysis of solids was performed six times and waste were treated in anaerobic digestion process in the dynamic sets using a respirometric Oxi-Top Control WTW. They were equipped with a reaction chamber with a volume of 1 liter tightly coupled with the device - measuring unit. This method allows to determine the activity of anaerobic sludge, the susceptibility of organic substrates, in this case roadside waste, to biodegradability and it was possible to estimate the quantity and composition of gaseous products of metabolism. The process was carried out by microorganisms under anaerobic conditions and the production of biogas was determined by the changes of partial pressure in the measuring chamber recorded and analyzed by measuring devices. Applied load in the chamber was 1 kg of fermentation d.m./m3.day. For substrate collected in each of five sites the analysis of quality and quantity of biogas produced was performed. The values of mean and standard deviation of the error and the quantity of biogas and the contents of basic components: methane and carbon dioxide were determined. Normality of distribution was confirmed by a test of the Shapiro-Wilk, while the hypothesis of homogeneity of variance in the groups was verified on the basis of Leveney test. Tests of differences between the averages of each group were performed using Tukey test RIR (reasonably significant difference). The amount of biogas in the conditions of the experiment ranged from 0.29 l/g d.m. for samples taken from 3, to 0.38 l/g d.m. in the case of the sample taken from 5 (Figure 2). At the same time there was no statistically significant differences in the amount of biogas formed between the substrate of fermentation attempts of successive research points. Average for all points was 56.5% methane, and carbon dioxide 43.5%. The highest percentage of methane was found in biogas plants originating from point 4, in this case, methane was up 63% of the resulting biogas. Significantly lower was the participation of methane in the biogas obtained from the substrate from the point 2 and 4. In this case, methane accounted for about 50.5%. The possibility of using energy crops as a substrate for biogas process is the subject of numerous scientific reports that confirm the effective use of different kinds of biomass fermentation processes. Often, the biomass materials are mainly from agricultural waste or specially geared towards the production of energy crops. The obtained results of volumes and composition of biogas produced during anaerobic digestion plant substrate from roadside wasteland indicate the potential use of this source of biomass.
Źródło:
Rocznik Ochrona Środowiska; 2011, Tom 13; 1865-1875
1506-218X
Pojawia się w:
Rocznik Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of options for erecting small hydroelectric power plants on the river Bystrzyca Północna
Autorzy:
Mazur, A.
Grzywna, A.
Kowalczyk-Juśko, A.
Cybulski, J.
Powiązania:
https://bibliotekanauki.pl/articles/125454.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
hydropower engineering
small hydroelectric power plant
energy potential
Opis:
This paper contains an analysis of conditions for erecting small hydroelectric power plants on the selected river in Lublin Region. The analysis covers technical options of the location of the facilities and their energy potential split into theoretical and technical potential. In addition, it refers to the most important legislative acts governing water management, including environmental protection. According to the analysis, the technical potential of small hydroelectric power plants on the river Bystrzyca Północna is about 125.5 kW. Energy production capacity is limited by both hydrological conditions and the necessity to adapt to regulatory framework concerning nature and environment protection, superior functions of watercourses and their situation in agricultural land.
Źródło:
Journal of Ecological Engineering; 2016, 17, 5; 254-260
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
FEATURES OF ENERGY SAVING POTENTIAL IN LITHUANIAN HOUSEHOLDS
Autorzy:
Simanaviciene, Zaneta
Volochovic, Andzej
Cibinskiene, Akvile
Powiązania:
https://bibliotekanauki.pl/articles/517327.pdf
Data publikacji:
2016
Wydawca:
Instytut Badań Gospodarczych
Tematy:
energy saving potential
households
evaluation
behavior change
Opis:
Scientists from all over the world recognize that saving energy in households is currently a very relevant topic. Energy resources are a very important factor for each country's economic vitality. Not only the country's replenishment in energy resources is important, but also the reduction of energy consumption volume. The Objective of the study: to assess the energy savings in households potential, applying the measures aimed at the behavior change of the population through energy-saving direction. Methodology: yhe impact of behavior change of the population measures is assessed according to the criteria of efficiency and effectiveness. In order to assess the potential for energy savings in households, the following methods, such as an experiment, the control group formation scenario, household questionnaire, were used. The questionnaire was designed to supplement the experiment, in order to gain deeper knowledge of the household, to obtain more detailed information about the nature of the behavior, to identify barriers to behavior change, and to select a control group of households to carry out the experiment. Data, results and main contribution of the paper: research shows that people's behavior related to energy saving is influenced by a number of macro-level and micro-level factors. In the article, the assumptions of the changing behavior of population are analyzed and the specific measures aimed at the behavior changes of the population selection and implementation impact assessment.
Źródło:
Equilibrium. Quarterly Journal of Economics and Economic Policy; 2016, 11, 1; 145-157
1689-765X
2353-3293
Pojawia się w:
Equilibrium. Quarterly Journal of Economics and Economic Policy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Theoretical study of kinetic isotope effects on hydrogen abstraction reactions
Autorzy:
Kurosaki, Y.
Powiązania:
https://bibliotekanauki.pl/articles/147000.pdf
Data publikacji:
2002
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
ab initio molecular orbital method
hyrogen abstraction reaction
potential energy surface
secondary isotope effect
transition state theory
tunneling
Opis:
Effects of isotopic substitutions of "spectator" hydrogens on rate constants have been theoretically examined for the CH3 + H2 ' CH4 + H (I) and C2H + H2 ' C2H2 + H (II) reactions using variational transition state theory with the multidimensional semiclassical tunneling correction. A small but significant secondary isotope effect was found for reaction (I) but almost no isotope effect was found for reaction (II). This is because the potential energy surface for reaction (II) has an "early" character.
Źródło:
Nukleonika; 2002, 47,suppl.1; 81-88
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
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