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International Journal of Theoretical and Mathematical Physics最新文献

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Foundations of Unified and General Field Theories 统一和一般场论的基础
International Journal of Theoretical and Mathematical Physics Pub Date : 2012-12-01 DOI: 10.5923/J.IJTMP.20120206.05
L. Petrova
{"title":"Foundations of Unified and General Field Theories","authors":"L. Petrova","doi":"10.5923/J.IJTMP.20120206.05","DOIUrl":"https://doi.org/10.5923/J.IJTMP.20120206.05","url":null,"abstract":"The theories of skew-symmetric differential forms, wh ich reflect the properties of conservation laws for physical fields and material systems, allow to disclose and justify the general principles of field theories. Belo w we present certain of concepts that lie at the basis of unified and general field theories.","PeriodicalId":415446,"journal":{"name":"International Journal of Theoretical and Mathematical Physics","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115832794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Diffraction of Impulse Sound Signals on Spheroidal Body, Put in Plane Waveguide 脉冲声信号在球面上的衍射，置于平面波导中
International Journal of Theoretical and Mathematical Physics Pub Date : 2012-12-01 DOI: 10.5923/J.IJTMP.20120206.06
A. Kleshchev, E. I. Kuznetsova
{"title":"Diffraction of Impulse Sound Signals on Spheroidal Body, Put in Plane Waveguide","authors":"A. Kleshchev, E. I. Kuznetsova","doi":"10.5923/J.IJTMP.20120206.06","DOIUrl":"https://doi.org/10.5923/J.IJTMP.20120206.06","url":null,"abstract":"With the help o f the Fourier t ransform and characteristics of the stationary (continuos) sound signal are calculated the impulses, scattered by the ideal spheroid, placed in the waveguide. In the first part of the paper is presented the method of the imag inary sources and imag inary scatterers from the solution of the problem of the sound diffraction on the spheroidal body, put in the plane waveguide. In the second part of the paper are calculated the impulse signals with different filling, scattered by the the ideal soft spheroid, placed in the plane waveguide.","PeriodicalId":415446,"journal":{"name":"International Journal of Theoretical and Mathematical Physics","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117039577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
SIMION Calculations for the Triode Extraction System 三极管提取系统的SIMION计算
International Journal of Theoretical and Mathematical Physics Pub Date : 2012-12-01 DOI: 10.5923/J.IJTMP.20120205.05
M. M. Abdelrahman, A. Helal, O. Moustafa, F. W. Abdelsalam
{"title":"SIMION Calculations for the Triode Extraction System","authors":"M. M. Abdelrahman, A. Helal, O. Moustafa, F. W. Abdelsalam","doi":"10.5923/J.IJTMP.20120205.05","DOIUrl":"https://doi.org/10.5923/J.IJTMP.20120205.05","url":null,"abstract":"Th is work deals with the simu lation process for the triode extraction system using SIMION co mputer program with and without space charge. Plasma boundary positions in ion ext raction systems for different values of the extraction voltage at constant plasma density have been simulated and discussed. The motion of ion beam trajectories with and without space charge effect has been studied.","PeriodicalId":415446,"journal":{"name":"International Journal of Theoretical and Mathematical Physics","volume":"31 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124448803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Particle-in-cell Simulations of Raman Forward Scattering Instability in Low-density Plasmas: A Computational Study 低密度等离子体拉曼前向散射不稳定性的粒子胞内模拟:计算研究
International Journal of Theoretical and Mathematical Physics Pub Date : 2012-12-01 DOI: 10.5923/J.IJTMP.20120206.07
A. Heidari, Seyedali Vedad Fatemeh Ghorbani, M. Ghorbani
{"title":"Particle-in-cell Simulations of Raman Forward Scattering Instability in Low-density Plasmas: A Computational Study","authors":"A. Heidari, Seyedali Vedad Fatemeh Ghorbani, M. Ghorbani","doi":"10.5923/J.IJTMP.20120206.07","DOIUrl":"https://doi.org/10.5923/J.IJTMP.20120206.07","url":null,"abstract":"Electro magnetic-wave propagation through equilibriu m p lasmas can lead to med iu m instabilities whose formation and growth conditions are of importance to study. Raman forward scattering (RFS) instability in low-density plasma s is investigated through particle-in-cell (PIC) simu lation, which is employed due to plasmas' high complexity, costly experiment process, and nonlinear behavior in physical terms. A 2D electro magnetic PIC code is used to model RFS instability. Do ing so, a plasma mediu m containing ions and electrons is PIC simulated and ions are assumed to form a constant background because of high inertia. The results indicate that as a plane electro magnetic wave enters the plasma med iu m, large -amp litude longitudinal waves, whose growth rate is well consistent with the theoretical results, begin to grow, suggesting the appearance of RFS instability.","PeriodicalId":415446,"journal":{"name":"International Journal of Theoretical and Mathematical Physics","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133243172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Debye'S Potentials Utilization in the Three-Dimensional Problems of the Radiation and Propagation of the Elastic Waves 弹性波的三维辐射和传播问题中的德拜势的应用
International Journal of Theoretical and Mathematical Physics Pub Date : 2012-12-01 DOI: 10.5923/J.IJTMP.20120206.01
S. Ilmenkov, A. Kleshchev
{"title":"The Debye'S Potentials Utilization in the Three-Dimensional Problems of the Radiation and Propagation of the Elastic Waves","authors":"S. Ilmenkov, A. Kleshchev","doi":"10.5923/J.IJTMP.20120206.01","DOIUrl":"https://doi.org/10.5923/J.IJTMP.20120206.01","url":null,"abstract":"Are studied internal and external tasks of radiat ion of a sound by the elastic bodies, excit ing by the harmonic point source, imitating turbulent pulsation of a flo w of a liquid. The angular characteristics of radiat ion of a hollow spheroidal shell are calcu lated. The characteristic equations of the axial three-d imensional flexural waves in the hollow cylindrical shell and cylindrical bar are received with the help of Debye's potentials. The phase velocities of the various forms of these waves for shells and for cylindrical bar are calculated.","PeriodicalId":415446,"journal":{"name":"International Journal of Theoretical and Mathematical Physics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128764300","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
From Infinitely Small to Infinitely Great 从无限小到无限大
International Journal of Theoretical and Mathematical Physics Pub Date : 2012-12-01 DOI: 10.5923/J.IJTMP.20120205.03
Aziz Ferradji
{"title":"From Infinitely Small to Infinitely Great","authors":"Aziz Ferradji","doi":"10.5923/J.IJTMP.20120205.03","DOIUrl":"https://doi.org/10.5923/J.IJTMP.20120205.03","url":null,"abstract":"During his career in physics, Albert Einstein tried hard to elaborate a theory that allows to unify the quantum mechanics with the celestial mechanics, therefore he published the general relativity in order to establish a link between the special relativity and the Newton’s gravitational law with the insight that gravity is not a force but rather a manifestation of curved space and time, which is produced by the mass-energy content of the space-time. But this theory has several flaws, especially when we try to explain the rotation of the moon around the earth, because we cannot represent a curved space created by the earth that allows the moon to gravitate, on the other hand Einstein did not accurately explain how the curved space is implicated in the mechanism of the earth’s rotation around its axis that has the same direction as the earth’s revolution around the sun, which makes it hard to explain the phenomenon of gravity with the general relativity, however it is obvious that gravity is the consequence of the creation of the universe, which means that the best way to define the origin of gravity, is the study of the transition from infinitely small to infinitely great.","PeriodicalId":415446,"journal":{"name":"International Journal of Theoretical and Mathematical Physics","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120977762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Laws of Nature Forbid the Existence of p = 0 Condensate in a System of Interacting Bosons 自然法则禁止在相互作用玻色子系统中存在p = 0凝聚
International Journal of Theoretical and Mathematical Physics Pub Date : 2012-12-01 DOI: 10.5923/J.IJTMP.20120205.02
Y. S. Jain
{"title":"Laws of Nature Forbid the Existence of p = 0 Condensate in a System of Interacting Bosons","authors":"Y. S. Jain","doi":"10.5923/J.IJTMP.20120205.02","DOIUrl":"https://doi.org/10.5923/J.IJTMP.20120205.02","url":null,"abstract":"Analyzing the basic dynamics of two bosons, interacting through a central force, we make three unequivocal conclusions: (i). Natural laws, demanding the ground state of a system to have least possible energy, forbid the existence of p = 0 condensate in a system of interacting bosons (SIB). (ii). The ground state of a SIB, with different number of particles having different mo menta does not have least possible energy as it should be. (iii). All part icles in the true ground state have identically equal energy, eo = h 2 /8md 2 , and equivalent mo mentum, qo = π/d. The real nature of Bose Einstein condensation (BEC) that exists in the superfluid state of a SIB is identified as the condensation of particles in a state of a pair of particles having equal and opposite mo menta (q, -q) with center of mass mo mentu m, K = 0 and q = π/d. We also discuss how experimental results pertaining to the existence of electron bubble and free rotation of mo lecules in heliu m droplets and clusters support the absence of p=0 condensate and how single particle basis (SPB), having an alliance with p=0 condensate, is inconsistent with certain physical realities of the system at lo w temperatures. These conclusions render strong support for our theory of superfluid ity of a system like liquid 4He (A mer. J. Cond. Mat. Phys. 2, 32-52(2012).","PeriodicalId":415446,"journal":{"name":"International Journal of Theoretical and Mathematical Physics","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126543639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
On a Long-Wave Instability of Steady-State Plane-Parallel Flows of an Ideal Fluid with Free Boundary in the Gravity Field 重力场中具有自由边界的理想流体稳态平面平行流的长波不稳定性
International Journal of Theoretical and Mathematical Physics Pub Date : 2012-08-31 DOI: 10.5923/J.IJTMP.20120201.02
Y. Gubarev
{"title":"On a Long-Wave Instability of Steady-State Plane-Parallel Flows of an Ideal Fluid with Free Boundary in the Gravity Field","authors":"Y. Gubarev","doi":"10.5923/J.IJTMP.20120201.02","DOIUrl":"https://doi.org/10.5923/J.IJTMP.20120201.02","url":null,"abstract":"We consider the problem of linear stability of steady-state plane-parallel flows of inviscid incompressible fluid of uniform density with free surface in the gravity field. Using the method of coupling the integrals of motion, we prove that sufficient conditions for the stability of these flows to small plane long-wave perturbations are absent. We construct an analytic example of a steady-state plane-parallel flow with small plane long-wave perturbations superimposed as normal modes","PeriodicalId":415446,"journal":{"name":"International Journal of Theoretical and Mathematical Physics","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130159582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Explicit Solutions of Maxwell-Einstein Equations 麦克斯韦-爱因斯坦方程的显式解
International Journal of Theoretical and Mathematical Physics Pub Date : 2012-08-31 DOI: 10.5923/J.IJTMP.20110101.02
Y. Zayko
{"title":"Explicit Solutions of Maxwell-Einstein Equations","authors":"Y. Zayko","doi":"10.5923/J.IJTMP.20110101.02","DOIUrl":"https://doi.org/10.5923/J.IJTMP.20110101.02","url":null,"abstract":"This article concerns the effect of gravitation field of the spherical electro-magnetic wave (EMW) on its propagation in vacuum. For this it was received a solution of the coupled Maxwell-Einstein equations. It is shown that in addition with traveling wave EMW at а great distance some new solution of so-called instanton type exists. It describes the process of quantum tunneling between degenerate states corresponding to convergent and divergent spherical waves in quasi-classical approximation. It is shown that these solutions for zero moment momentum describe fields of point-like charges - electric e and magnetic g. Symmetry of Maxwell equations with respect to group U(1) of dual transformations: (E+iH) → (E+iH)e iα , (E and H are electric and magnetic fields, α - is real parameter) is valid for generalized charge e + ig, which is transformed in the same manner. Spontaneous breaking of symmetry of this group, which is characterized tgα = - g/e, leads to arising mass-less particles (photons?) due to Goldstone theorem. This also leads to the fact that magnetic charges cannot be detected in Nature.","PeriodicalId":415446,"journal":{"name":"International Journal of Theoretical and Mathematical Physics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122931091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Explicit Solutions of the Maxwell-Einstein Equations.II 麦克斯韦-爱因斯坦方程的显式解。2
International Journal of Theoretical and Mathematical Physics Pub Date : 2012-08-31 DOI: 10.5923/J.IJTMP.20110101.03
Y. Zayko
{"title":"Explicit Solutions of the Maxwell-Einstein Equations.II","authors":"Y. Zayko","doi":"10.5923/J.IJTMP.20110101.03","DOIUrl":"https://doi.org/10.5923/J.IJTMP.20110101.03","url":null,"abstract":"This article is a continuation of the previous author's article on the same problem(1). Here choice of metrics discusses in detail, so as another possible metrics, like generalization of the Schwarzschild metric of massive body due to radiation of electromagnetic wave. A problem of lowering the initially spherical symmetry to axial one in solution's level for Einstein-Maxwell (or Maxwell) equations due to fixation of z-axis of coordinate system and its recovery with the help of zero-modes is discussed. Localized solutions of the Einstein-Maxwell equations (geons) are discussed, too.","PeriodicalId":415446,"journal":{"name":"International Journal of Theoretical and Mathematical Physics","volume":"146 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129058111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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