Physics & Astronomy International Journal最新文献_第4页

Propagation of Solar disturbances in the heliosphere to a distance of 100 au 太阳扰动在日球层传播到100天文单位的距离

Physics & Astronomy International Journal Pub Date : 2023-02-24 DOI: 10.15406/paij.2023.07.00282

S. Akasofu

{"title":"Propagation of Solar disturbances in the heliosphere to a distance of 100 au","authors":"S. Akasofu","doi":"10.15406/paij.2023.07.00282","DOIUrl":"https://doi.org/10.15406/paij.2023.07.00282","url":null,"abstract":"Explosive solar activities cause heliospheric disturbances. A simple scheme of simulating the propagation of shock waves in the heliosphere is devised to study such disturbances caused by solar flares. This scheme, the HAF scheme, is capable of simulating the propagation of many shock waves generated during extended periods up to a distance of 100 au (200 days) during periods when many solar disturbances can occur. The capability of the scheme is demonstrated in reproducing: (1) Multi-events with multi-satellite data within 2 au: (2) The heliospheric conditions at Ulysses/ Cassini within 10 au. (3) A successful reproduction of a Pioneer 11 event at 30 au. (4) The heliospheric condition up to 100 au in 2004, in addition to (5) reproducing recurrent geomagnetic srorms. Thus, the method presented here is simple enough in predicting a rough overall pattern of heliospheric disturbances on a day-to-day basis without MHD simulations. In this paper, we assembled systematically (in terms of distance from the sun) the above multiple results during the development of the HAF scheme in different periods by many researchers. It is hoped that much better schemes will be developed　by extending and improving the HAF scheme.","PeriodicalId":377724,"journal":{"name":"Physics & Astronomy International Journal","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130259273","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

Relativistic life time of spinning black holes 旋转黑洞的相对论寿命

Physics & Astronomy International Journal Pub Date : 2023-02-20 DOI: 10.15406/paij.2023.07.00281

Dipo Mahto

引用次数: 0

Lie algebra classification, conservation laws and invariant solutions for modification of the generalization of the Emden–Fowler equation 李代数的分类、守恒定律及Emden-Fowler方程泛化修正的不变解

Physics & Astronomy International Journal Pub Date : 2023-02-14 DOI: 10.15406/paij.2023.07.00280

G. Loaiza, Y. Acevedo, Oml Duque, D. G. Hernández

引用次数: 0

Matrix solution for the inverse problem of classical dynamics of a particle 粒子经典动力学逆问题的矩阵解

Physics & Astronomy International Journal Pub Date : 2023-02-07 DOI: 10.15406/paij.2023.07.00279

Ana B. Calado, Juan D. Bulnes

引用次数: 0

On the Einstein relation between mobility and diffusion cofficint in an active Nanostructured Materials 活性纳米结构材料中迁移率与扩散系数的爱因斯坦关系

Physics & Astronomy International Journal Pub Date : 2023-02-03 DOI: 10.15406/paij.2023.07.00277

Subhamoy Singha Roy

引用次数: 0

Future math teachers ‘knowledge about fair games 未来数学教师关于公平博弈的知识

Physics & Astronomy International Journal Pub Date : 2022-11-28 DOI: 10.15406/paij.2022.06.00272

Tulio Amaya De Armas

引用次数: 0

Perceptions of a – level physics students and teachers on the effectiveness of online physics teaching and learning 一级物理学生和教师对在线物理教与学的有效性的看法

Physics & Astronomy International Journal Pub Date : 2022-11-23 DOI: 10.15406/paij.2022.06.00271

Alois Matorevhu

{"title":"Perceptions of a – level physics students and teachers on the effectiveness of online physics teaching and learning","authors":"Alois Matorevhu","doi":"10.15406/paij.2022.06.00271","DOIUrl":"https://doi.org/10.15406/paij.2022.06.00271","url":null,"abstract":"Compelling evidence why physics should be effectively taught at secondary school level, include its use in the universe to find solutions to daily life challenges. Physics education prepares secondary school graduates to proceed with the study and application of science to explore the universe, as well as being productive members of diverse socio – economic sectors of any nation. Understanding Physics and developing skills that allow students to be responsible citizens in promoting sustainable development depends on how physics education is taught. While interaction between classmates, and students and teachers is important, but with the advent of the COVID – 19 outbreak the learn from home policy which many countries adopted, suspended face – to – face learning, giving way to physics online learning as a combination of synchronous and asynchronous distance learning. This study sought to explore A – Level physics learners' and teachers’ perceptions on the effectiveness of online physics teaching and learning. Semi – structured interviews with purposive sampled A – Level physics learners (PLs) and physics teachers (PTs) were used to collect data. Findings from the study show that if online physics learning is to be successfully, then it should be implemented blended with face – to – face learning. However, ways to support those learners disadvantaged financially to afford data to remain internet connected, should be put into place so that every learners benefits. The study has shown that not all physics concepts can be taught effectively through online strategy, therefore physics syllabi should clearly spell out areas which can be taught online and those which are mandatory to be taught face – to – face.","PeriodicalId":377724,"journal":{"name":"Physics & Astronomy International Journal","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129638389","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

Utilization from ultraviolet to infrared light for CO2 reduction with P4O10/TiO2 photocatalyst 利用P4O10/TiO2光催化剂从紫外光到红外光还原CO2

Physics & Astronomy International Journal Pub Date : 2022-11-08 DOI: 10.15406/paij.2022.06.00268

A. Nishimura, Homare Mae, Takahiro Kato, E. Hu

引用次数: 1

Nuclear energy and sustainable development 核能与可持续发展

Physics & Astronomy International Journal Pub Date : 2022-11-02 DOI: 10.15406/paij.2022.06.00267

Manyika Kabuswa Davy, P. J. Banda, Manyika Kambeu Morris, L. K. Matindih

{"title":"Nuclear energy and sustainable development","authors":"Manyika Kabuswa Davy, P. J. Banda, Manyika Kambeu Morris, L. K. Matindih","doi":"10.15406/paij.2022.06.00267","DOIUrl":"https://doi.org/10.15406/paij.2022.06.00267","url":null,"abstract":"The dependency on combustion of coal, oil and gas for energy cannot be indefinite. Thus, the process of replacing fossil fuels with many energy technologies cannot be avoided in order to combat this high dependency. Nevertheless, we argue that in the long term, nuclear fission technology is the answer to the ever increasing demand for energy. This entails that nuclear fission has to play a major role in suppling energy in this age and beyond. In achieving this, the major aspect is in switching electrical energy generation from fossil fuels to nuclear fission. This cannot be achieved in a short period of time but in few decades citing France as an example.1 This energy transformation campaign is capable of reducing emissions of carbon dioxide as well as other greenhouse gases at a large scale. In view of this, replacement of coal-fired with gas-fired generating stations will not significantly reduce greenhouse gases emissions. What about the other energy sources such as wind and solar? These may not be an ultimate answer as they will be hard pressed in supply and may fall short in energy supply at very high scale. This is because they depend on backup power or energy storage hence not able to meet the ever growing high demand of energy. Therefore, this paper focuses on the current status of nuclear energy. It also discusses the future prospects of nuclear energy and the activities of the International Atomic Energy Agency (IAEA).","PeriodicalId":377724,"journal":{"name":"Physics & Astronomy International Journal","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127006184","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

The cosmic pendulum: Kepler‘s laws representing a universal cosmic clock 宇宙钟摆:代表宇宙时钟的开普勒定律

Physics & Astronomy International Journal Pub Date : 2022-10-17 DOI: 10.15406/paij.2022.06.00266

Hans J Fahr

{"title":"The cosmic pendulum: Kepler‘s laws representing a universal cosmic clock","authors":"Hans J Fahr","doi":"10.15406/paij.2022.06.00266","DOIUrl":"https://doi.org/10.15406/paij.2022.06.00266","url":null,"abstract":"Recent observations of the James Webb Space Telescope (JWST) seem to show that structure formation and the build-up of planetary systems in the universe already must have started astonishingly enough at a time of 0.1 Gigayears after the Big-Bang. The question thus arises whether these earliest planetary systems did originate under similar conditions as did our solar system about 4.1 Gigayears later? In this article we are looking onto this fundamental problem and show that for the context of the origin of solar systems it very much counts how the Hubble expansion of the universe has developed over cosmic eons. If the cosmic expansion dynamics is too large, no solar systems at all would have been produced, if it would be too small, solar systems would have originated just shortly after the cosmic matter recombination, but not anymore since then. In other words, the Keplerian laws, derivable with the help of Newton‘s gravitational law, would they perhaps reflect the changes in an expanding universe over the cosmic eons? And if yes, - how would they do it? In this article we conclude that in fact Newton‘s pendulum or Kepler‘s planetary revolution periods represent a perfect cosmic clock indicating the actual status of the expanding universe. Only in case, however, that Newton‘s gravitational constant G would vary with the scale R of the universe like G - R, then this clock astonishingly enough would be synchronized for the whole cosmic evolution not serving anymore as a cosmic tracer.","PeriodicalId":377724,"journal":{"name":"Physics & Astronomy International Journal","volume":"102 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117167796","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

Physics &amp; Astronomy International Journal最新文献

Physics & Astronomy International Journal最新文献