{"title":"Majority-vote model in one-dimensional on directed small-world networks","authors":"M. V. A. Cícera, F. Lima","doi":"10.15406/paij.2018.02.00140","DOIUrl":"https://doi.org/10.15406/paij.2018.02.00140","url":null,"abstract":"In 1992 Oliveira9 proposed the a non-equilibrium model known as MVM which disobeys the detailed balance. The update of the MVM follows a Markov sequence of stochastic dynamics with local rules and with up-down symmetry. In 2D, on a square lattice, the MVM presents a continuous phase transition with critical exponents identical9 of the Ising model10. Sousa11 and Brenda12 studied the Ising model and MVM on DSW random lattices, respectively. The exponents obtained in both models are identical and in agreement with the conjecture suggested by Grinstein et al.1","PeriodicalId":137635,"journal":{"name":"Physics & Astronomy International Journal","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122084451","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":"Radiology and radiation therapy","authors":"Pradeep Kumar, C. Dixit","doi":"10.15406/paij.2018.02.00139","DOIUrl":"https://doi.org/10.15406/paij.2018.02.00139","url":null,"abstract":"closed-loop radiation therapy process is adaptive radiation treatment where the treatment process can be modified using a systematic feedback of measurements. Adaptive radiation therapy has the intention to improve radiation treatment by systematically monitoring treatment variations and incorporating them to re-optimize the treatment plan early on during the course of treatment. By this process, field margin and treatment dose can be consistently customized to each respective patient to achieve a safe dose escalation.","PeriodicalId":137635,"journal":{"name":"Physics & Astronomy International Journal","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124958924","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":"Universe (Part 2 v2): Rolling of space and time into a point","authors":"A. Bolonkin","doi":"10.15406/paij.2018.02.00136","DOIUrl":"https://doi.org/10.15406/paij.2018.02.00136","url":null,"abstract":"Astronomers observe current and earlier stages in the development of the Universe. They can see at great distances. They suggest that the universe has always been ruled by the same physical laws. The Solar System is implanted in a galaxy. The most galaxies have the billions of stars. The Milky Way and other galaxies that exist outside it, are located as far as astronomical instruments can reach. Current cosmology studies of galaxies and their spectral lines. The universe is expanding and had a beginning. Telescope Hubble shows galaxies consisting of billions of stars.","PeriodicalId":137635,"journal":{"name":"Physics & Astronomy International Journal","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126561341","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–vacuum perfect fluid static cylindrically symmetric solutions in f(R) gravity and their energy distribution","authors":"Farhat Imtiaz, M. Amir","doi":"10.15406/paij.2018.02.00131","DOIUrl":"https://doi.org/10.15406/paij.2018.02.00131","url":null,"abstract":"Out of many other alternative theories of Einstein’s theory of gravity, the ( ) f R theory of gravity has a long history. During the last few years, there has been tremendous change in this area bringing about a lot of study which yields exciting results. On behalf of some evidences, it has been concluded that Weyl1 was the first who worked in the field of ( ) f R gravity while many others are in view that it was Eddington2 who was the pioneer to contribute in this field. Later, Buchdahl3 reflected his ideas and efforts in the same field. A comprehensive review has been presented here which consists of relevant literature and important features and characteristics of ( ) f R theories of gravity.4","PeriodicalId":137635,"journal":{"name":"Physics & Astronomy International Journal","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130554055","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":"Cosmological lorentzian wormholes via noether symmetry approach","authors":"A. Sanyal, R. Mandal","doi":"10.15406/paij.2018.02.00132","DOIUrl":"https://doi.org/10.15406/paij.2018.02.00132","url":null,"abstract":"Noether symmetry has been invoked to explore the forms of a couple of coupling parameters and the potential appearing in a general scalar-tensor theory of gravity in the background of Robertson-Walker space-time. Exact solutions of Einstein's field equations in the familiar Brans-Dicke, Induced gravity and a General non-minimally coupled scalar-tensor theories of gravity have been found using the conserved current and the energy equation, after being expressed in a set of new variables. Noticeably, the form of the scale factors remains unaltered in all the three cases and represents cosmological Lorentzian wormholes, analogous to the Euclidean ones. While classical Euclidean wormholes requires an imaginary scalar field, the Lorentzian wormhole do not, and the solutions satisfy the weak energy condition.","PeriodicalId":137635,"journal":{"name":"Physics & Astronomy International Journal","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125000802","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 the dependence of the speed of light in vacuum on temperature","authors":"Y. Poluektov","doi":"10.15406/paij.2018.02.00143","DOIUrl":"https://doi.org/10.15406/paij.2018.02.00143","url":null,"abstract":"It is shown that the interaction of the electromagnetic field with the vacuum of the electron-positron field gives rise to dependence of the speed of light propagation on the radiation temperature. Estimation show that in the modern epoch, even at very high temperatures, such for example which exist in the star interiors, the temperature-dependent correction to the speed of light proves to be extremtly small. But in the cosmological model of the hot Universe, in the first instances after the Big Bang the temperature was so high that the speed of light exceeded its present value by many orders of magnitude. The effect of dependence of the speed of light on temperature must be important for understanding the early evolution of the Universe.","PeriodicalId":137635,"journal":{"name":"Physics & Astronomy International Journal","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121858528","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":"Compact four–dimensional euclidean space embedded in the universe","authors":"Y. Kurihara","doi":"10.15406/paij.2018.02.00092","DOIUrl":"https://doi.org/10.15406/paij.2018.02.00092","url":null,"abstract":"A compact four-dimensional manifold whose metric tensor has a positive determinant (named the \"Euclid ball\") is considered. The Euclid ball can be immersed in the Minkovskian space (which has the negative determinant) and can exist stably through the history of the universe. Since the Euclid ball has the same solution as the Schwarzschild black hole on its three-dimensional surface, an asymptotic observer can not distinguish them. If large fraction of whole energy of the pre-universe was encapsulated in Euclid balls, they behave as the dark matter in the current universe. Euclid balls already existed at the end of the cosmological inflation, and can have a heavy mass in this model, they can be a seed of supper-massive black-holes, which are necessary to initiate a forming of galaxies in the early universe. The $gamma$-ray burst at early universe is also a possible signal of the Euclidean ball.","PeriodicalId":137635,"journal":{"name":"Physics & Astronomy International Journal","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131716536","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":"Gibb’s free energy of the spinning black holes","authors":"Dipo Mahto, A. Ranjan","doi":"10.15406/PAIJ.2020.04.00199","DOIUrl":"https://doi.org/10.15406/PAIJ.2020.04.00199","url":null,"abstract":"The present gives a model for the change in Gibb’s free energy of spinning black holes with corresponding change in the event horizon using the first law of black hole mechanics, mass-energy equivalence relation applied to the Gibb’s free energy of the Reissnner-Nordstrom black hole and concludes that the magnitude of change in free energy with corresponding change in the event horizon is approximately similar to the magnitude of change in temperature of spinning black holes with corresponding change in the mass in XRBs.","PeriodicalId":137635,"journal":{"name":"Physics & Astronomy International Journal","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124251176","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":"Bonding of third additive with Se & Te alters DC conductivity of ternary ChGs","authors":"V. Saraswat","doi":"10.15406/paij.2019.03.00154","DOIUrl":"https://doi.org/10.15406/paij.2019.03.00154","url":null,"abstract":"Selenium (Se) has proved its potential in wide commercial applications. Its device applications like switching, memory and Xeroxing etc. made it attractive. It also exhibits a unique property of reversible transformation.1 This property makes it very useful in optical memory devices. But in pure state it has some disadvantages because of its short lifetime and low sensitivity. To overcome these difficulties certain additives are used and binary and ternary chalcogenide glasses are obtained e.g. the addition of small percentage of Sb is sufficient to cause crystallization of Se.2−4","PeriodicalId":137635,"journal":{"name":"Physics & Astronomy International Journal","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130226936","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}
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