Physics & Astronomy International Journal最新文献

{"title":"On loop space-self avoiding string representations for Q.C.D(SU(∞))","authors":"L. Botelho","doi":"10.15406/paij.2019.03.00152","DOIUrl":"https://doi.org/10.15406/paij.2019.03.00152","url":null,"abstract":"We present several clarifying comments on the loop space-self avoid string representation for Q.C.D(SU(∞)) proposed by this author along last decades.","PeriodicalId":137635,"journal":{"name":"Physics & Astronomy International Journal","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130668703","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}

{"title":"A note on the Maxwell Equations of electromagnetic irradiation in a holed spatial region","authors":"Luiz CL Botelho","doi":"10.15406/paij.2019.03.00151","DOIUrl":"https://doi.org/10.15406/paij.2019.03.00151","url":null,"abstract":"We make relevant and important comments (on engineering context of Maxwell equations for the electrical and magnetic field ) on the electromagnetic irradiation in a holed spatial region with a non trivial topology ,by rewriting those Maxwell Equations on light of the Helmholtz theorem for vectorial fields .","PeriodicalId":137635,"journal":{"name":"Physics & Astronomy International Journal","volume":"131 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115896038","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}

{"title":"The Antigravitation-fiction or reality?","authors":"Marius Arghirescu, L. Spiridon","doi":"10.15406/paij.2019.03.00150","DOIUrl":"https://doi.org/10.15406/paij.2019.03.00150","url":null,"abstract":"coupled electrons with opposed charges, which gives a preonic, quasi-crystalline internal structure of cold formed quarks with hexagonal symmetry,5 based on 0 34 e z m ≈ preonexperimentally evidenced in 20156 but considered as Xboson of a fifth force , of leptonsto quark binding, and on two cold formed bosonic ‘zerons’ : 0 2 4 136 ; e z z m = = and 0 7 238 e z z m π = = , formed as clusters of degenerate electrons with degenerate mass and magnetic moment and with degenerate charge ( ) * / 3 2 e e = , (characteristic to the up-quarkin the quantum mechanics).","PeriodicalId":137635,"journal":{"name":"Physics & Astronomy International Journal","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134457337","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}

{"title":"Wormholes with quardratic equation of state","authors":"F. Rahaman, Sumita Banerjeey, Safiqul Islam","doi":"10.15406/paij.2019.03.00149","DOIUrl":"https://doi.org/10.15406/paij.2019.03.00149","url":null,"abstract":"To describe the spacetime of any massive objects (i.e. whether astrophysical objects like stars, galaxies etc or hypothetical objects like black holes, wormholes etc), it requires an interpretation of the matter content of the object. As a conventional process one can use fluid (as matter source) to study cosmological as well as astrophysical phenomena. But for matter fluid further specification of an EOS is desired. Before the acceleration of the Universe was discovered, pupils usually considered linear EOS as = p mρ (with 0 1 m ≤ ≤ ). But for the last few years theoretical physicists have used different EOS (particularly, Phantom energy, the generalized Chaplygin gas, Vander Walls quintessence EOS, etc) and elucidated the causes of the expansion of the Universe in an accelerated manner. Also, it has been shown that wormholes be supported by the fluid with these different equation of states.1 The homogeneous as well as inhomogeneous cosmological models of the universe have been suitably defined recently by Ananda et al.2, by a quadratic EOS. This quadratic EOS, 2 0 = p p αρ βρ + + , where 0 p , α and β are parameters, represents the Taylor series expansion of the barotropic EOS, ( ) p ρ and ρ being arbitrary. It is known that the mystery behind the expansion of the universe is dark energy or unified dark matter which can be defined by a quadratic EOS as demonstrated by Ananda et al.2","PeriodicalId":137635,"journal":{"name":"Physics & Astronomy International Journal","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129868340","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}

{"title":"Non dark hyperbolic universe","authors":"Salah A. Mabkhout","doi":"10.15406/paij.2019.03.00148","DOIUrl":"https://doi.org/10.15406/paij.2019.03.00148","url":null,"abstract":"Cosmology, in its broadest definition, is the study of the cosmos. It aims to provide an accurate description of the universe. Throughout much of the history of science, the development of cosmology was hampered by the lack of a universal physical theory. Observational tools were extremely limited, and there was no mathematical formulation for physical laws. Cosmology depends upon a fundamental premise. As a science, it must deal strictly with what can be observed, but the observable universe forms only a fraction of the whole cosmos. One is forced to make the fundamental but unverifiable assumption that the portion of the universe which can be observed is representative of the whole universe, and that the laws of physics are the same throughout the whole universe. Once we make this assumption, we can construct a model of the universe based on a description of its observable part.1 The satellite’s observations of the cosmic microwave background radiation (CMB) indicate that the universe is geometrically –locallyflat, or pretty close to it. Not even perfectly flat. In the flat Universe where the curvature is zero and the density is the critical density, new hypothetical objects, dark energy and dark matter are essential to bridge the gap between theory and observation. It is clear that these new ingredients, dark energy and dark matter, arose as a consequence to the false flat universe paradigm. Without them, there would be a fatal contradiction between the observations made by astronomers and the predictions of the Big Bang Theory.2 The realization from the rotation curves of galaxies that there is considerably more matter with attractive gravity, called dark matter, than we can see via electromagnetic radiation (the visible matter) complicates things. With attractive gravity between the components of the universe the expectation was that the expansion velocity of the universe, the so called Hubble velocity, would decrease with time, i.e. a decelerating universe. The recent discovery that the Hubble velocity is increasing with time, an accelerating universe, was an immense surprise. This led to the postulation of the existence of a new component of the universe, dark energy, with some very unusual properties, not the least among which is that it has, in some sense of the word, repulsive gravity that drives the acceleration. A flat-dust universe with zero pressure models is an oversimplification solution to the Einstein’s Field equations. This led to drastic failure in predicting the missing mass and the accelerating expansion of the universe. We may question the accuracy of our solutions to the equations of General Relativity, which depend on some approximation scheme. These approximations provided analytical solutions which enabled most of the early progress in General Relativistic cosmology and astrophysics. We may question whether General Relativity is valid, given that the universe cannot be modeled sufficiently accurately by General Relativi","PeriodicalId":137635,"journal":{"name":"Physics & Astronomy International Journal","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124396682","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}

{"title":"On Finsler geometry, MOND and diffeomorphic metrics to the Schwarzschild solution","authors":"C. Perelman","doi":"10.15406/paij.2018.02.00147","DOIUrl":"https://doi.org/10.15406/paij.2018.02.00147","url":null,"abstract":"","PeriodicalId":137635,"journal":{"name":"Physics & Astronomy International Journal","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126421617","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}

{"title":"Secure electronic voting scheme by the new quantum signature-masked authentication","authors":"N. Fatahi, Hamid Reza Afsheh","doi":"10.15406/paij.2018.02.00146","DOIUrl":"https://doi.org/10.15406/paij.2018.02.00146","url":null,"abstract":"The most successful subject of quantum cryptography is quantum key distribution (QKD), which was firstly constructed by Bennett et al.1 in 1984. It is believed that QKD is the first applied quantum information processing and its unconditional security has been proven.2,3 Most recently, in addition to QKD, quantum cryptography protocols have been widely studied in many fields such as quantum digital signature, quantum message authentication, quantum image encryption and quantum steganography. Quantum digital signature is an important topic and a primitive component of modern cryptography. The digital signature is a mathematical scheme that maintains the authenticity of the data and digital document in channel.4 A secure quantum signature scheme requires that each user is able to generate his (her) own signature effectively and verifies the validity of another user’s signature on a specific document. Also, no one is able to efficiently generate the signatures of other users on documents that those users didn’t sign. Therefore, it can be used to guarantee the authenticity, integrity and non-disavowal of transmitted messages or the signer of a document.","PeriodicalId":137635,"journal":{"name":"Physics & Astronomy International Journal","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129925136","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}

{"title":"A Gamma-ray in a uniform compton scatterer","authors":"V. Uchaikin","doi":"10.15406/paij.2018.02.00144","DOIUrl":"https://doi.org/10.15406/paij.2018.02.00144","url":null,"abstract":"Describing the transport of particles in a medium from a source with phase density ( ) Q x immersed in a medium, interaction of which with the particles is described by the operator L. In the problem under consideration, ( ) f x may denote the flux of photons, or their concentration, or some other local characteristics of the photon field at a point = ( , ) x r p of the phase space. For the sake of convenience, we will represent the photon momentum p through the pair of variables = / p Ω p (the direction unit vector) and = E cp (photon’s energy).","PeriodicalId":137635,"journal":{"name":"Physics & Astronomy International Journal","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115357482","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}

{"title":"Some comments on electromagnetic oscillations in anisotropic cavities-wave equations and boundary conditions","authors":"Luiz CL Botelho","doi":"10.15406/paij.2018.02.00142","DOIUrl":"https://doi.org/10.15406/paij.2018.02.00142","url":null,"abstract":"","PeriodicalId":137635,"journal":{"name":"Physics & Astronomy International Journal","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116842413","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}

{"title":"Topological solitons in an DNA molecule spin chain","authors":"S. Roy","doi":"10.15406/paij.2018.02.00141","DOIUrl":"https://doi.org/10.15406/paij.2018.02.00141","url":null,"abstract":"It is now well known that DNA can be regarded as a physical elastic object in a viscous environment. Two strands of double helix are antiparallel and two polynucleotide chains are coiled about the same axis such that B-DNA (Z-DNA) has right-handed (left -handed) helical sense. The existence of super coiled DNA has been confirmed in experiments long ago and it was found that in vivo chromosomal DNA molecules contain topological domains along which super coiling canoccue.1−3 DNA molecules from prokaryotes (cells without nuclear membranes) oft en adopt the interwound structures which are called plectonemic” super coils. In eukaryotes (cells with nuclei and other organelles with their own internal membranes) chromosomal DNA molecules are also known to be organized into topological independent loops.2−5 Statistical mechanics of super coiled DNA has been studied by several authors.6","PeriodicalId":137635,"journal":{"name":"Physics & Astronomy International Journal","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130739823","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}