International Journal of Physical Sciences最新文献

{"title":"Extraction of ionospheric vertical total electron content (VTEC) using global navigation satellite system-continuously operating reference station (GNSS-CORS) data from station BF01 in Ouagadougou","authors":"Ouédraogo Pouraogo, G. Karim, Diabaté Abidina, Fleury Rolland, Ouattara Frédéric","doi":"10.5897/ijps2023.5065","DOIUrl":"https://doi.org/10.5897/ijps2023.5065","url":null,"abstract":".","PeriodicalId":14294,"journal":{"name":"International Journal of Physical Sciences","volume":"35 47","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140358245","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":"Effect of basalt on the mechanical and thermal behavior of a lightweight concrete based on Typha australis","authors":"Oumar Abdelhakh Azibert, Hisseine Issaka Alhadj, Soultan Malloum, Sow Djibril, Gaye Salif","doi":"10.5897/ijps2023.5058","DOIUrl":"https://doi.org/10.5897/ijps2023.5058","url":null,"abstract":"This article examines the impact of integrating basalt aggregates into concrete based on Typha australis for housing applications. We conducted an experimental study focusing on mechanical and thermal characterization to analyze the influence of basalt aggregates compared to the results of previous work on T. australis concrete without basalt. The results indicate that both density and mechanical resistance to compression decrease with the dosage of Typha, yet the values obtained are significantly higher than those of concrete without basalt. Additionally, thermal resistance increases with the Typha dosage. However, for low Typha dosages, the thermal resistance is slightly higher than that of concrete without basalt, whereas for high dosages, it is slightly lower. Nevertheless, this finding allows for a reduction in the building's thermal load and an enhancement of thermal comfort. However, it's important to note that the mechanical strength remains relatively low for a high-strength structure.","PeriodicalId":14294,"journal":{"name":"International Journal of Physical Sciences","volume":"47 S1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140413851","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":"Mapping of geological structures controlling mineralization in parts of the Lower Benue Trough, Nigeria, using high resolution aeromagnetic data","authors":"J. M. Chukwuebuka, C. E. Chukwudi","doi":"10.5897/ijps2023.5047","DOIUrl":"https://doi.org/10.5897/ijps2023.5047","url":null,"abstract":"","PeriodicalId":14294,"journal":{"name":"International Journal of Physical Sciences","volume":"5 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140414763","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":"Variability of the electric field of magnetospheric convection in recurrent activity during the solar cycle 24","authors":"Alfred Stephane Dama, Salfo Kaboré, Sibri Alphonse Sandwidi, Frédéric Ouattara","doi":"10.5897/ijps2023.5039","DOIUrl":"https://doi.org/10.5897/ijps2023.5039","url":null,"abstract":"This paper employs a statistical approach to investigate the diurnal variability of the magnetospheric convective electric field (MCEF) during recurrent activity, considering the phases of solar cycle 24. This study reveals that the magnetosphere exhibits greater dynamism during the maximum and descending phases on recurrent days. The diurnal variability of the MCEF on days of recurrent geomagnetic activity indicates the following trends: (a) An increasing trend followed by a decreasing trend at the phase minimum of the solar cycle; (b) A decreasing trend followed by an increasing trend during the ascending phase and the phase maximum, and (c) five trends during the descending phase. From the minimum phase of the solar cycle to the falling phase, the daily mean values of the MCEF are 0.07428018, 0.10682778, 0.14172194, and 0.11505584 mV/m, respectively. Night-time magnetic reconnections with a southern interplanetary magnetic field (IMF) occur at the phase maximum of the solar cycle and during all-phase periods. Daytime magnetic reconnections occur during the ascending phase at 0700 UT and during the descending phase at 1000 UT.","PeriodicalId":14294,"journal":{"name":"International Journal of Physical Sciences","volume":"117 38","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139134019","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":"Contribution of solar quiet (Sq) daily current variations to the deep earth conductivity within the Southern African Region","authors":"A. O. Ngozi, N. Francisca, Emmanuel Awucha Igwe","doi":"10.5897/ijps2023.5027","DOIUrl":"https://doi.org/10.5897/ijps2023.5027","url":null,"abstract":"This work focuses on determining the source current systems by applying the method of spherical harmonic analysis (SHA) to geomagnetic field data obtained from ground measurements. The objectives are to establish the mantle conductivity-depth profile and to compare the results of the profiles from four stations with other research findings. The study utilizes magnetometer data obtained for the year 2011 from geomagnetic stations located in Hermanus, Maputo, Tsumeb, and Hartebeesthoek within the Southern African region. The Gauss SHA method, along with Matlab software, is employed to separate the internal and external field contributions to solar quiet (Sq) current variations. Subsequently, a transfer function is used to calculate the electrical conductivity-depth profile of the region. The results show that, across all the stations, the highest seasonal Sq current was recorded in the month of June for Hartebeesthoek, Hermanus, and Tsumeb regions. Maputo, however, exhibited an exception with nearly triple peaks in the months of March, June, and December, with the highest occurring during the December solstice. The evaluated maximum values for seasonal Sq current in Hartebeesthoek, Hermanus, Maputo, and Tsumeb are approximately 16.0, 12.5, 12.0, and 14.8 nT, respectively. An equinoxial maximum with a value of 2.1 × 103 A was observed in the seasonal external Sq current in March within the Maputo region, while a solsticial minimum with a value of 0.75 × 103 A occurred in June in the Hartebeesthoek region. The seasonal separated external Sq current system pattern appears to be the same as that of the seasonal Sq current system, indicating that the source of the Sq current system is external to the Earth. The study reveals the greatest depth of Sq current penetration and the highest electrical conductivity values within the Southern African region when compared with other research. Finally, this research contributes to establishing the electrical conductivity of Maputo and Hartebeesthoek regions, where no prior work has been conducted.","PeriodicalId":14294,"journal":{"name":"International Journal of Physical Sciences","volume":"40 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139202204","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":"foF2 diurnal variation at Dakar station during the period of geomagnetic shock of variable duration over solar cycle 21 and 22: Prediction with IRI 2016","authors":"Mahamat Nour Ali, Gouara Douzane, Alphonse Sandwidi Sibri, Ouattara Frederic","doi":"10.5897/ijps2023.5048","DOIUrl":"https://doi.org/10.5897/ijps2023.5048","url":null,"abstract":".","PeriodicalId":14294,"journal":{"name":"International Journal of Physical Sciences","volume":"21 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139205468","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":"Hydrogeological assessment of groundwater resources within Isuikwuato and environ South Eastern Nigeria: Agenda for food agriculture and clean water policies","authors":"Chima CHIZOBA Joshua, Ojonugwa USMAN Ayatu, Chris EZEH Chukwudi, Augustine CHINWUKO Ifeanyi, AZUOKO George-Best, Chigoziem AKAKURU Obinna, Obinna IHEME Kenneth","doi":"10.5897/ijps2023.5035","DOIUrl":"https://doi.org/10.5897/ijps2023.5035","url":null,"abstract":"Groundwater resources of the Isuikwuato area, south eastern Nigeria, have been evaluated using integrated geophysical and hydrogeochemical techniques, to determine the quality and usability of the groundwater for domestic and agricultural purposes. Twenty Vertical Electrical Soundings (VES) physicochemical analyses were done. Depth to aquiferous unit varies from 38 to 148 m. The hydrogeochemical characterization shows that anion area, 85% of the total water sample in the area is Cl- dominant, whereas 10% are HCO3- dominant and 5% of the sample had mixed dominant ionic specie. In the cation area, 75% of the total water samples had Ca2+ as their dominant ionic specie, while 25% of the samples had mixed dominant ionic specie. According to the Piper diagram, the region is in the geochemical zone 1 (Alkalines earth exceeds Akalines). The Durov plot demonstrates that there is ionic exchange occurring within the groundwater zone with a hydrogeochemical evolution trend of Cl-> HCO3-+CO32-> Ca2+>Na++K+> SO42-> Mg2+. Principal Component Analysis (PCA) values indicated loadings were present for 37.42% of the parameters (PP) in PP1, 65.60% of the parameters in PP2 and in PP3, it had 75.23 loadings. The water is suitable for agriculture giving the value of calculated Sodium Adsorption Ratio (SAR) that ranges from 0.20 – 0.56. This study recommends that the government should leverage this to availability of clean water and food to the people to enable it to achieve its sustainable development goals (SDGs).   Key words: Groundwater, hydrogeochemistry, geophysical, aquiferous zone, Isuikwuato.","PeriodicalId":14294,"journal":{"name":"International Journal of Physical Sciences","volume":"25 12","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135769358","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":"Geo-spatial distribution of radio refractivity and the influence of fade depth on microwave propagation signals over Nigeria","authors":"Lawrence Ojo Olalekan","doi":"10.5897/ijps2023.5036","DOIUrl":"https://doi.org/10.5897/ijps2023.5036","url":null,"abstract":"The need for more bandwidth for a broad range of purposes necessitates research into how radio refractivity, multipath fading, and geoclimatic variables affect terrestrial and satellite propagation links. In this study, a geographical distribution approach to radio refractivity and fade depth over five locations in Nigeria—Akure, Enugu, Jos, Minna, and Sokoto based on five-year (2017–2021) measured data of atmospheric pressure, relative humidity, and temperature—at two levels (ground surface and 100 m heights). The results demonstrated the percentage occurrence of the dry terms dominating the radio refractivity constituent at the surface level, with a minimum and maximum contributions of about 78 and 92%, while at heights of 100 m, the percentage occurrence of the dry terms dominated the radio respectively refractivity constituent, contributing a minimum of about 79% and a maximum of about 92%. The spatial distribution reveals that, regardless of height, the tropical rainforest (TRF) and freshwater swampy mangrove (FWSM) regions reported the highest values of radio refractivity. The statistical estimate shows that fading values can differ by as much as 1.5 dB, especially near the TRF and FWSM coastlines, even during clear air conditions. The current findings will be helpful for budgeting Earth-space microwave links, particularly for the rollout 5G and future-generation microcellular networks in Nigeria.","PeriodicalId":14294,"journal":{"name":"International Journal of Physical Sciences","volume":"143 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139353605","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":"Mannheim partner curves in the special linear group","authors":"DE ThiagoA., A. Mendonça","doi":"10.5897/ijps2023.5023","DOIUrl":"https://doi.org/10.5897/ijps2023.5023","url":null,"abstract":"In this study, we state some basic results about the geometry of the special linear group SL(2,R), seen as a subset of , in terms of the left invariant fields, such as bracketing, Levi Civita connection ∇ and Riemann curvature tensor R, we give some basic theorems for Mannheim partner curves in the special linear group. We also find the relations between the curvatures and torsions of these associated curves and we give necessary and sufficient conditions for a given curve to be a Mannheim partner curve of another given curve through a relation between its curvature and torsion.","PeriodicalId":14294,"journal":{"name":"International Journal of Physical Sciences","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83044279","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 mathematical model development to investigate the impact of key parameters on the generated voltage hysteresis of silicon anode based lithium half cells","authors":"Abir Hossain Al-Mustasin","doi":"10.5897/ijps2022.5003","DOIUrl":"https://doi.org/10.5897/ijps2022.5003","url":null,"abstract":"Lithium-ion batteries are widely used in various energy storage systems. In this article, a physics-based mathematical model of silicon micro-particle (SiMP) anode is developed to identify the principal reasons of voltage hysteresis occurrence during lithiation and delithiation battery cycling of silicon (Si) anode-based lithium half cells. Firstly, lithium diffusion, reaction kinetics, thermodynamics and mechanical stress and strain are selected, and relevant mathematical equations are developed. To examine the impact of hydrostatic stresses on electrochemical reactions in battery electrodes, a modified version of Butler-Volmer (BV) kinetics equation including hydrostatic stress induced voltage term is implemented. For model development, essential parameters are identified and sensitivity analysis is conducted to figure out the best fitted parametric values. Finally, a physics-based mathematical model is developed to investigate the impact of key parameters on generated voltage hysteresis of the SiMP half cells. Using this mathematical model, voltage curves are generated and fitted with the experimental results. In addition, the model is used to identify performance limitations. By examining the influence of the key parameters on the voltage curves during battery cycling, the model exhibits the principal causes of voltage differences during lithiation and delithiation. The detail of this article will provide more crucial information.","PeriodicalId":14294,"journal":{"name":"International Journal of Physical Sciences","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87279580","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}