Abstract In the paper the unsteady incompressible fluid flow over the infinite and finite prismatic bodies is studied. Mathematically this problem is modeled as 3D Navier-Stokes equations (NSE) for the fluid velocity components with the appropriate initial-boundary conditions. The study of the fluid flow over the bodies with the sharp edges is the important problem of Aerodynamics and Hydrodynamics. We admit that near the sharp edges the velocity components are non-smooth. By the methods of mathematical physics the bounded novel exact solutions are obtained for the specific pressure. The profile of the velocity is plotted by means of “Maplesoft”.
{"title":"On the Incompressible Fluid Flow over the Prismatic Bodies","authors":"Khatiashvili Nino","doi":"10.12691/ijp-10-2-2","DOIUrl":"https://doi.org/10.12691/ijp-10-2-2","url":null,"abstract":"Abstract In the paper the unsteady incompressible fluid flow over the infinite and finite prismatic bodies is studied. Mathematically this problem is modeled as 3D Navier-Stokes equations (NSE) for the fluid velocity components with the appropriate initial-boundary conditions. The study of the fluid flow over the bodies with the sharp edges is the important problem of Aerodynamics and Hydrodynamics. We admit that near the sharp edges the velocity components are non-smooth. By the methods of mathematical physics the bounded novel exact solutions are obtained for the specific pressure. The profile of the velocity is plotted by means of “Maplesoft”.","PeriodicalId":22540,"journal":{"name":"The International Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84887921","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}
Gabriel Kipkemei Chirchir, Winfred Mueni Mulwa, Bamidele Ibrahim Adetunji
The structural, electronic and mechanical properties of Re doped FeMnP0.67A0.33 (A= Ga and Ge) were examined by use of density functional theory (DFT) within the generalized gradient approximations as demonstrated in Quantum ESPRESSO code. The optimized structural parameters as well as derived lattice parameters are in consistent with other computational and achievable experimental results. The computed independent elastic constants confirm the mechanical stability of the investigated materials. The computed Poisson’s and Pugh’s ratios as well as Cauchy pressure, verify that FeMn0.67Re0.33P0.67Ga0.33 is the most ductile among the studied compounds. The calculated values of bulk modulus, shear modulus and Young’s modulus confirm high values of bond strength, hardness and stiffness of the investigated materials respectively. Therefore, the four compounds considered may be appropriate for industrial applications. The results report that FeMn0.67Re0.33P0.67Ga0.33 compound is more ductile and mechanically stable compared to other investigated compounds. This is the first qualitative computational prediction of the elastic properties of FeMnP0.67Ge0.33, FeMnP0.67Ga0.33, FeMn0.67Re0.33P0.67Ge0.33 and FeMn0.67Re0.33P0.67Ga0.33 compounds and this awaits experimental ratification. The calculated electronic density of states confirms that the Re_2p states are located in the conduction band (CB) in the unite cell while Re_3d dominate the CB in the supercell. Results from the doped compounds could not be compared with experimental or computational findings because to the best of our knowledge, this has not been done.
{"title":"Structural, Electronic and Mechanical Properties of Re Doped FeMnP0.67A0.33 (A=Ga and Ge): A DFT Study","authors":"Gabriel Kipkemei Chirchir, Winfred Mueni Mulwa, Bamidele Ibrahim Adetunji","doi":"10.12691/ijp-10-1-6","DOIUrl":"https://doi.org/10.12691/ijp-10-1-6","url":null,"abstract":"The structural, electronic and mechanical properties of Re doped FeMnP0.67A0.33 (A= Ga and Ge) were examined by use of density functional theory (DFT) within the generalized gradient approximations as demonstrated in Quantum ESPRESSO code. The optimized structural parameters as well as derived lattice parameters are in consistent with other computational and achievable experimental results. The computed independent elastic constants confirm the mechanical stability of the investigated materials. The computed Poisson’s and Pugh’s ratios as well as Cauchy pressure, verify that FeMn0.67Re0.33P0.67Ga0.33 is the most ductile among the studied compounds. The calculated values of bulk modulus, shear modulus and Young’s modulus confirm high values of bond strength, hardness and stiffness of the investigated materials respectively. Therefore, the four compounds considered may be appropriate for industrial applications. The results report that FeMn0.67Re0.33P0.67Ga0.33 compound is more ductile and mechanically stable compared to other investigated compounds. This is the first qualitative computational prediction of the elastic properties of FeMnP0.67Ge0.33, FeMnP0.67Ga0.33, FeMn0.67Re0.33P0.67Ge0.33 and FeMn0.67Re0.33P0.67Ga0.33 compounds and this awaits experimental ratification. The calculated electronic density of states confirms that the Re_2p states are located in the conduction band (CB) in the unite cell while Re_3d dominate the CB in the supercell. Results from the doped compounds could not be compared with experimental or computational findings because to the best of our knowledge, this has not been done.","PeriodicalId":22540,"journal":{"name":"The International Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90640025","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":"Doubly-Excited 1,3Se, 1,3P0, 1,3De, 1,3F0 and 1,3Ge Resonances States of Two-Electron Atoms below the N = 3 – 8 Hydrogenic Thresholds","authors":"M. T. Gning, I. Sakho","doi":"10.12691/ijp-10-1-2","DOIUrl":"https://doi.org/10.12691/ijp-10-1-2","url":null,"abstract":"","PeriodicalId":22540,"journal":{"name":"The International Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81050086","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 Mysterious Constant Alpha (α) in Quantumphysics","authors":"T. G.M. Gerlitz","doi":"10.12691/ijp-10-1-4","DOIUrl":"https://doi.org/10.12691/ijp-10-1-4","url":null,"abstract":"","PeriodicalId":22540,"journal":{"name":"The International Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82489111","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}
Alireza Heidari, Margaret Hotz, Nancy MacDonald, Victoria Peterson, Angela Caissutti, E. Besana, J. Esposito, K. Schmitt, Ling-Yu Chan, Francesca Sherwood, M. Henderson, Jimmy Kimmel
In the current research, catalytic effectiveness of synchrotron and synchrocyclotron radiations on Osmium Dioxide (OsO 2 ) and Osmium Tetroxide (OsO 4 ) nano capsules delivery in DNA/RNA of cancer cells is investigated. The calculation of thickness and optical constants of Osmium Dioxide (OsO 2 ) and Osmium Tetroxide (OsO 4 ) catalytic effectiveness of synchrotron and synchrocyclotron radiations on Osmium Dioxide (OsO 2 ) and Osmium Tetroxide (OsO 4 ) nano capsules delivery in DNA/RNA of cancer cells produced using sol–gel method over glassy medium through a single reflection spectrum is presented. To obtain an appropriate fit for reflection spectrum, the classic Drude–Lorentz model for parametric di–electric function is used. The best fitting parameters are determined to simulate the reflection spectrum using Lovenberg–Marquardt optimization method. The simulated reflectivity from the derived optical constants and thickness are in good agreement with experimental results. 4 Nano and Influence, Impression and Efficacy in Cancer Prevention, Prognosis, Diagnosis, Imaging, Screening, Treatment and Management under Synchrotron and Synchrocyclotron Radiations.”
{"title":"Osmium Dioxide (OsO2) and Osmium Tetroxide (OsO4) Smart Nano Particles, Nano Capsules and Nanoclusters Influence, Impression and Efficacy in Cancer Prevention, Prognosis, Diagnosis, Imaging, Screening, Treatment and Management under Synchrotron and Synchrocyclotron Radiations","authors":"Alireza Heidari, Margaret Hotz, Nancy MacDonald, Victoria Peterson, Angela Caissutti, E. Besana, J. Esposito, K. Schmitt, Ling-Yu Chan, Francesca Sherwood, M. Henderson, Jimmy Kimmel","doi":"10.12691/ijp-10-1-1","DOIUrl":"https://doi.org/10.12691/ijp-10-1-1","url":null,"abstract":"In the current research, catalytic effectiveness of synchrotron and synchrocyclotron radiations on Osmium Dioxide (OsO 2 ) and Osmium Tetroxide (OsO 4 ) nano capsules delivery in DNA/RNA of cancer cells is investigated. The calculation of thickness and optical constants of Osmium Dioxide (OsO 2 ) and Osmium Tetroxide (OsO 4 ) catalytic effectiveness of synchrotron and synchrocyclotron radiations on Osmium Dioxide (OsO 2 ) and Osmium Tetroxide (OsO 4 ) nano capsules delivery in DNA/RNA of cancer cells produced using sol–gel method over glassy medium through a single reflection spectrum is presented. To obtain an appropriate fit for reflection spectrum, the classic Drude–Lorentz model for parametric di–electric function is used. The best fitting parameters are determined to simulate the reflection spectrum using Lovenberg–Marquardt optimization method. The simulated reflectivity from the derived optical constants and thickness are in good agreement with experimental results. 4 Nano and Influence, Impression and Efficacy in Cancer Prevention, Prognosis, Diagnosis, Imaging, Screening, Treatment and Management under Synchrotron and Synchrocyclotron Radiations.”","PeriodicalId":22540,"journal":{"name":"The International Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77767108","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}
The special relativity theory predicts a relativistic or transverse Doppler effect. This effect is verified by many photon-emission experiments. However, when researchers tried to measure the Doppler effect of electromagnetic waves reflected from a transversely moving surface, they obtained a null result. This paper presents a photon density theory to explain these mixed results. The theory can explain the relativistic phenomena predicted by the special relativity theory, as well as the negative results of transverse Doppler effect from rotating mirrors. Contrary to the prediction from the special relativity, the photon density theory suggests that the Doppler effect of light is asymmetric.
{"title":"A Photon Density Theory Explaining Experiments on High-order Doppler Effect","authors":"Xianming Meng","doi":"10.12691/ijp-9-6-6","DOIUrl":"https://doi.org/10.12691/ijp-9-6-6","url":null,"abstract":"The special relativity theory predicts a relativistic or transverse Doppler effect. This effect is verified by many photon-emission experiments. However, when researchers tried to measure the Doppler effect of electromagnetic waves reflected from a transversely moving surface, they obtained a null result. This paper presents a photon density theory to explain these mixed results. The theory can explain the relativistic phenomena predicted by the special relativity theory, as well as the negative results of transverse Doppler effect from rotating mirrors. Contrary to the prediction from the special relativity, the photon density theory suggests that the Doppler effect of light is asymmetric.","PeriodicalId":22540,"journal":{"name":"The International Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80443010","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}
We reexamined the Copenhagen interpretations of quantum mechanics from the perspectives of mathematical deduction, logic reasoning process and intrinsic physical nature of wave function. We conclude that all the Heisenberg’s uncertainty principle, Born rule, and Bohr’s complimentary principle were not correct. Even for a quantum particle, at specific time, it must be classically localized but not non-local. Based on our analysis and deduction, the right interpretations to quantum mechanics were also developed.
{"title":"Reexamine Copenhagen Interpretations of Quantum Mechanics","authors":"Z. Bo","doi":"10.12691/ijp-9-6-3","DOIUrl":"https://doi.org/10.12691/ijp-9-6-3","url":null,"abstract":"We reexamined the Copenhagen interpretations of quantum mechanics from the perspectives of mathematical deduction, logic reasoning process and intrinsic physical nature of wave function. We conclude that all the Heisenberg’s uncertainty principle, Born rule, and Bohr’s complimentary principle were not correct. Even for a quantum particle, at specific time, it must be classically localized but not non-local. Based on our analysis and deduction, the right interpretations to quantum mechanics were also developed.","PeriodicalId":22540,"journal":{"name":"The International Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73473229","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":"Thick Lenses Systems between Arbitrary Index of Refraction Optical Media. A Simple Optical Model for the Human Eye","authors":"Fulvio Andres Callegari","doi":"10.12691/ijp-9-6-1","DOIUrl":"https://doi.org/10.12691/ijp-9-6-1","url":null,"abstract":"","PeriodicalId":22540,"journal":{"name":"The International Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76673954","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}
We investigate the Casimir effect in the context of a nontrivial topology by means of a generalized Matsubara formalism. This is performed in the context of a scalar field in D Euclidean spatial dimensions with d compactified dimensions. The procedure gives us the advantage of considering simultaneously spatial constraints and thermal effects. In this sense, the Casimir pressure in a heated system between two infinite planes is obtained and the results are compared with those found in the literature.
{"title":"An Alternative Approach for Quantum Forces in Toroidal Topology","authors":"A. Malbouisson","doi":"10.12691/ijp-9-5-5","DOIUrl":"https://doi.org/10.12691/ijp-9-5-5","url":null,"abstract":"We investigate the Casimir effect in the context of a nontrivial topology by means of a generalized Matsubara formalism. This is performed in the context of a scalar field in D Euclidean spatial dimensions with d compactified dimensions. The procedure gives us the advantage of considering simultaneously spatial constraints and thermal effects. In this sense, the Casimir pressure in a heated system between two infinite planes is obtained and the results are compared with those found in the literature.","PeriodicalId":22540,"journal":{"name":"The International Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91438474","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}
In this study, we used calibrated annual Angstrom-Prescott (AP) coefficients of nine (9) weather stations in Cote d'Ivoire to formalize two general equations expressing them as a function of the latitude and altitude. The aim is formalizing the general equations of Angstrom-Prescott coefficients that can be used to increase the density of global horizontal irradiance. The Angstrom-Prescott coefficients thus obtained were compared with the values calibrated using the root mean square error (RMSE), the mean bias error (MBE), the mean absolute bias error (MABE), the NSE coefficient and the statistical t-test (t-stat) with the following results for coefficients a and b respectively: 0.00935143, -0.00042828, 0.00825164, 0.99734601, 0.12129825 and 0.00633772, -0.00017254, 0.00471422, 0.7653197, 0.072056623. To improve the estimation of coefficient a, we linked it to the coefficient b by a polynomial function of degree two. This equation led to a significant decrease in the absolute estimation error of coefficient a resulting in low values of RMSE and MABE. RMSE decreased from 0.00935143 to 0.00498464 and MABE decreased from 0.00825164 to 0.00346367. The low values of the statistical t-test (t-stat) (0.45735957 for a and 0.07205623 for b) for the two equations show that the model agrees well with the data. The good agreement between the annual Angstrom-Prescott coefficients estimated and calibrated also confirmed by high NSE coefficients (0.99924593 for a and 0.7653197 for b) recommends the use of this model in any site in Cote d'Ivoire to predict global horizontal irradiance.
{"title":"General Formulation of Ångström-Prescott Coefficients: A New Approach for Côte d’Ivoire","authors":"M. Djoman, F. W. Fassinou, A. Memelèdje","doi":"10.12691/ijp-9-5-4","DOIUrl":"https://doi.org/10.12691/ijp-9-5-4","url":null,"abstract":"In this study, we used calibrated annual Angstrom-Prescott (AP) coefficients of nine (9) weather stations in Cote d'Ivoire to formalize two general equations expressing them as a function of the latitude and altitude. The aim is formalizing the general equations of Angstrom-Prescott coefficients that can be used to increase the density of global horizontal irradiance. The Angstrom-Prescott coefficients thus obtained were compared with the values calibrated using the root mean square error (RMSE), the mean bias error (MBE), the mean absolute bias error (MABE), the NSE coefficient and the statistical t-test (t-stat) with the following results for coefficients a and b respectively: 0.00935143, -0.00042828, 0.00825164, 0.99734601, 0.12129825 and 0.00633772, -0.00017254, 0.00471422, 0.7653197, 0.072056623. To improve the estimation of coefficient a, we linked it to the coefficient b by a polynomial function of degree two. This equation led to a significant decrease in the absolute estimation error of coefficient a resulting in low values of RMSE and MABE. RMSE decreased from 0.00935143 to 0.00498464 and MABE decreased from 0.00825164 to 0.00346367. The low values of the statistical t-test (t-stat) (0.45735957 for a and 0.07205623 for b) for the two equations show that the model agrees well with the data. The good agreement between the annual Angstrom-Prescott coefficients estimated and calibrated also confirmed by high NSE coefficients (0.99924593 for a and 0.7653197 for b) recommends the use of this model in any site in Cote d'Ivoire to predict global horizontal irradiance.","PeriodicalId":22540,"journal":{"name":"The International Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88615825","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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