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1
Content available remote Superconducting fullerenes in a nonconventional thermodynamical model
100%
Maruszewski B.
Archives of Mechanics
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1998
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tom Vol. 50, nr 3
497-508
EN
A crystalline solid of C[60] (a fullerene) is expected to be an insulator or a semiconductor. However, one of the most striking properties of C[60] - related materials is the observation of relatively high temperature superconductivity in alkali metal doped M[3]C[60] and in various alkaline earth doped compounds. So, the interstitial diffusion of impurities considerably influences the superconductivity phase. The value of the critical temperature below which the superconducting phase exists, strongly depends on many other external influences (electromagnetic, thermal, mechanical, etc.). The paper deals with construction of a phenomenological macroscopic model of interactions between physical fields in fullerenes, basing on the extended thermodynamics with internal variables and with the use of Liu's theorem in order to apply the entropy inequality.
2
Content available remote Professor Jarosław Stefaniak 1929–2008
100%
Maruszewski B.
Vibrations in Physical Systems
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2010
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tom Vol. 24
23--27
3
Material thermodynamical description of ferroelastics
63%
Restuccia L. , Maruszewski B.
Zeszyty Naukowe Politechniki Świętokrzyskiej. Mechanika
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1998
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tom Z. 66
202-208
EN
The paper concerns matrial description of ferroelastics arbitrarily deformed within elastic region. The extended thermodynamical-like model of interactions is presented. Within the proposed model nonobjectivity of the vector thermodynamical potential has been avoided.
4
Content available remote Effect of panelling, application of the Kutta condition and the way of positioning the control points on the numerical solution of panel methods : Part II
63%
Bahbah M. M. , Maruszewski B.
Computer Assisted Mechanics and Engineering Sciences
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1998
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tom Vol. 5, nr 1
9-19
EN
An efficient, accurate, and simple numerical method is necessarv for analysis and design of an incompressible potential flow around multi-element airfoils. In this paper, which is the subject of the second part of the study, the mathematical model is built utilizing the local coordinate system, while in the first part of the study [2] only the global coordinate system is used. Mathematical model, by the vortex panel method with the use of the stream function, is written for the analysis of potential flow over multi-element airfoils. The computational model is built for both uniform and linear vortex distributions with utilizing the constant stream function boundary condition. From the fact that any study which does not consider deeply and precisely, all the parameters relevant to the computational model, might make is fragmentary. Hence, the following parameters are tested to investigate their effect on the accuracy of the method. They are: both types of the vortex distribution, two types of panelling, different ways of applying the Kutta condition, and two ways of positioning the control points. For the purpose of easier comparison, the study cases performed using the present, model are restricted only to single-element airfoils; NACA 0012 airfoil at an angle of attack a=8.3°, and a cusped trailing edge 15 percent thick Van de Vooren airfoil at a=5°.
5
Doping and mass transfer in fullerenes
63%
Drzewiecki A. , Maruszewski B.
Journal of Technical Physics
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2001
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tom Vol. 42, no 4
407-418
EN
A crystalline solid of C60 (a fullerene) is expected to be an insulator or a semiconductor. However, one of the most striking properties of C60 - related materials is the observation of relatively high temperature superconductivity in alkali metal doped M3C60 and in various alkaline earth doped compounds. So, the interstitial diffusion of impurities considerably influences the superconductivity phase. The value of the critical temperature below which the superconducting phase exists strongly depends on many other external influences (electromagnetic, thermal, mechanical, etc.). The paper deals with construction of a phenomenological macroscopic model of interactions between physical fields in fullerenes, basing on the extended thermodynamics with internal variables and with the use of Liu's theorem in order to apply the entropy inequality. Two types of the mass diffusion have been taken into account constructing the model.
6
The usefulness of ultrastructure investigations for the evaluation of the vitality of aortal homografts
51%
Czarnowska E. , Maruszewski B. , Fedorowicz M.
Folia Histochemica et Cytobiologica
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1986
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tom 24
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nr 4
7
On a nonconventional thermodynamical model of a defective piezoelectric crystal
51%
Giambo S. , Maruszewski B. , Restuccia L.
Journal of Technical Physics
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2002
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tom Vol. 43, no 2
155-163
EN
The paper deals with an extended thermodynamical description of a defective piezoelectric crystal. Introducing a dislocation core tensor as an internal variable, the body is regarded as homogeneous and isotropic. Liu's theorem is applied to analyze the entropy inequality. The general constitutive relations for the state laws are derived, including all the possible linear and higher order simple and cross-effects which occur in the crystal when thermal, electric, elastic and dislocation fields interact with each other.
8
Content available remote Unexpected properties of SH-waves in superconducting heterostructure
51%
Drzewiecki A. , Maruszewski B. , Starosta R.
Vibrations in Physical Systems
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2008
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tom Vol. 23
109--114
EN
The paper provides confrontation of a surface wave of SH polarization propagating in a superconducting layer (type II superconductor) located in a superconducting halfspace of similar material properties. It was found that the wave in the determined heterostructure is distinguished by the properties significantly different from classical Love wave propagating in similar elastic structure. Among more important differences first of all should be mentioned occurrence of only one mode and changed direction of the inequality that determines allowable range of phase velocity of propagating wave. Both waves are subject to normal dispersion.
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