Applied Journal of Physical Science最新文献

Some inequalities bounding certain ratios of the q-gamma function 一些不等式限定了q函数的某些比值

Applied Journal of Physical Science Pub Date : 2023-06-30 DOI: 10.31248/ajps2023.092

Mohammed Hashimu

引用次数: 0

A theoretical framework for nonlinear dynamics in finance systems: Implications for stability, control and synchronization 金融系统非线性动力学的理论框架:稳定性、控制和同步的含义

Applied Journal of Physical Science Pub Date : 2023-04-30 DOI: 10.31248/ajps2023.088

C. Ogabi, Tijani Shehu, B. Idowu, Rilwan Mustapha, O. Kesinro, Shu’aibu Muhammad

{"title":"A theoretical framework for nonlinear dynamics in finance systems: Implications for stability, control and synchronization","authors":"C. Ogabi, Tijani Shehu, B. Idowu, Rilwan Mustapha, O. Kesinro, Shu’aibu Muhammad","doi":"10.31248/ajps2023.088","DOIUrl":"https://doi.org/10.31248/ajps2023.088","url":null,"abstract":"It has been widely observed that most deterministic dynamical systems go into chaos for some values of their parameters. One of the most popular and widely used criteria is the conditional Lyapunov exponents, which constitute average measurements of expansion or shrinkage of small displacements along the synchronized trajectory. The Lyapunov characteristic exponents play a crucial role in the description of the behaviour of dynamical systems as they can be used to analyse the stability limit sets and to check sensitive dependence on initial conditions, that is, the presence of chaotic attractors. In this paper, Lyapunov stability theory and linear matrix inequalities (LMI) are employed to design control functions for the respective, control, and synchronization of the chaotic and hyperchaotic finance systems. The designed linear matrix inequalities (LMI) nonlinear controllers are capable of stabilizing the chaotic and hyperchaotic finance systems at any position as well as controlling it to track any trajectory that is a smooth function of time. The respective chaotic attractors were found to have a moderate value of the largest Lyapunov exponents (0.874959 s^(-1) and 0.650847 s^(-1)) with associated (Lyapunov) dimensions of 1.00 and 2.00 for the chaotic and hyperchaotic finance systems respectively. Based on Lyapunov stability theory and linear matrix inequalities (LMI), some necessary and sufficient criteria for stable synchronous behaviour are obtained and an exact analytic estimate of the threshold coupling, k_th, for complete chaos synchronization is derived. Finally, numerical simulation results are presented to validate the feasibility of the theoretical analysis.","PeriodicalId":253947,"journal":{"name":"Applied Journal of Physical Science","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117330010","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

Geoelectrical, hydrochemical, and health risk assessment of groundwater quality in Fountain University, Osogbo, Nigeria 尼日利亚奥索博喷泉大学地下水质量的地电、水化学和健康风险评估

Applied Journal of Physical Science Pub Date : 2023-04-30 DOI: 10.31248/ajps2023.091

A. Majolagbe, J. M. Whetode, O. Adeogun, R. B. Adegbola, K. Yusuf, S. O. Anko, M. C. Munis

{"title":"Geoelectrical, hydrochemical, and health risk assessment of groundwater quality in Fountain University, Osogbo, Nigeria","authors":"A. Majolagbe, J. M. Whetode, O. Adeogun, R. B. Adegbola, K. Yusuf, S. O. Anko, M. C. Munis","doi":"10.31248/ajps2023.091","DOIUrl":"https://doi.org/10.31248/ajps2023.091","url":null,"abstract":"Geoelectrical method and physiochemical analyses were applied to obtain subsurface resistivity variation and water quality assessment respectively in Fountain University, Osogbo, Osun State. A young academic institution with a measurable growing population is seriously concerned with the hygienic situation within its environment, especially water quantity and quality. The geophysical method was employed to determine the subsurface groundwater potentials via vertical electrical sounding (VES) using the Schlumberger array. Ten (10) water samples were collected from different locations within the study area and analyzed for physiochemical parameters and trace metals using standard procedure. Water quality index (WQI), exceedance, and human health risk index were determined. All parameters estimated were below the WHO permissible limits except the pH and iron concentration. WQI values of the ten collected water samples reflected 100% excellent grade for drinking. Chronic dietary intake (CDI) is in the order of Fe >Zn > Cu for both children and adults. The VES (9 location points were studied) data revealed four to five geo-electric layers which corresponded to the topsoil, lateritic clay, weathered layer, fractured basement, and fresh basement with thickness ranges of 0.5 to 39.6 m, while resistivity values vary from 27.5 to 5432.6 Ωm. The study observed and recommended that boreholes could be sunk at VES 1, 6, and 7 at depths between 26.1 to 39.6 m for exploitation of good quality water along with continuous monitoring of groundwater quality to maintain the good water quality area, hence the safety of the environment.","PeriodicalId":253947,"journal":{"name":"Applied Journal of Physical Science","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125884692","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

Delineation of source magnetization and subsurface discontinuity of Ririwai Ring Complex along Kano, North Western Nigeria 尼日利亚西北部Kano沿线Ririwai环杂岩震源磁化和地下不连续的圈定

Applied Journal of Physical Science Pub Date : 2023-04-30 DOI: 10.31248/ajps2023.087

M. Mukhtar, A. Usman, M.A. Jeba, A. M. Lawan

{"title":"Delineation of source magnetization and subsurface discontinuity of Ririwai Ring Complex along Kano, North Western Nigeria","authors":"M. Mukhtar, A. Usman, M.A. Jeba, A. M. Lawan","doi":"10.31248/ajps2023.087","DOIUrl":"https://doi.org/10.31248/ajps2023.087","url":null,"abstract":"High Resolution Aeromagnetic (HRAM) data of Ririwai (sheet 126) which lies between latitude 10° 30' to 11° 00' N and longitude 8° 30' E to 9° 00' E, was used for this research. The study area, Ririwai is situated along Kano, in the Northwestern part of Nigeria, both qualitative and quantitative interpretation techniques were employed in this study. This procedure was carefully undertaken by employing enhancement filters; vertical derivative, upward continuation, analytical signal amplitude processing, and quantitative approaches such as Euler 3D deconvolution and an apparent susceptibility filter to help further give solutions for depth estimates and magnetization. The Euler deconvolution was able to show that the solution plotted clustered around the region where the geological structures are located with average depths range of <139.8 to >904.5 m, with very few solutions having depths less than 200 m, the most prominent structure particularly the Ririwai ring complex have a depth range of 182.9 to 301.5 m. The magnetic susceptibility reading obtained shows that the area is composed of rocks high in magnetic minerals such as magnetite along the western end of the area, it is also flanked by medium to high magnetic values around the central parts with only regions of low magnetic values predominantly along the Ririwai complex and its adjoining outcrops towards the eastern half of the area under study.","PeriodicalId":253947,"journal":{"name":"Applied Journal of Physical Science","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132607969","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

Thermal and atomic properties of hydrogen atom and diatomic molecules in Wilson-Racah Quantum System Wilson-Racah量子系统中氢原子和双原子分子的热性质和原子性质

Applied Journal of Physical Science Pub Date : 2023-02-28 DOI: 10.31248/ajps2022.081

D. A. Otor, V. T. Emmanuel, A. Gundu, B. V. Gurgur, S. E. Nyiyongo, D. S. Igba

{"title":"Thermal and atomic properties of hydrogen atom and diatomic molecules in Wilson-Racah Quantum System","authors":"D. A. Otor, V. T. Emmanuel, A. Gundu, B. V. Gurgur, S. E. Nyiyongo, D. S. Igba","doi":"10.31248/ajps2022.081","DOIUrl":"https://doi.org/10.31248/ajps2022.081","url":null,"abstract":"In this study, a conventional quantum mechanics in which the potential function is not specified but replaced by specifying four parameters Wilson-Racah orthogonal polynomials in the energy and physical parameter space was presented. The wave function is written as a bounded sum of elements of a complete basis with these polynomials as expansion coefficients. By finding the asymptotic of these Wilson – Racah polynomials, the physical properties of the corresponding system (wave function, bound state energy spectrum and/or scattering phase shift) was obtained. Wilson – Racah quantum system was applied to determine the thermodynamics and atomic properties of Hydrogen atom and diatomic molecules. All properties of associated physical systems are obtained directly and simply from the asymptotic of the associated orthogonal polynomials. This new model, gives good an approximate prediction of the Hydrogen atom energy with an estimated average error of 0.125%. The proposed procedure merely relies on experimental values of five molecular constants. The average relative percentage deviations of the thermodynamic properties’ functions Q, U, C, S and F which are 2.42, 0.45, 0.30, 1.23 and 1.50% satisfied the experimental finding as ascertained. These represent satisfactory compromise between accuracy and rapid computations.","PeriodicalId":253947,"journal":{"name":"Applied Journal of Physical Science","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115890260","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

Thermal properties of coulomb-type potentials in a magnetic field using the Phase – Integral model 用相位积分模型计算磁场中库仑型电位的热特性

Applied Journal of Physical Science Pub Date : 2023-02-28 DOI: 10.31248/ajps2022.086

A. Ngiangia, O. Amadi, Tombotamunoa W. Jim-Lawson

引用次数: 0

Evaluation of the mechanical properties of sawdust, oil bean pod filler, raffia palm fibre and CaCO3 filled/epoxy hybridized composite 木屑、油豆荚填料、棕榈纤维和碳酸钙/环氧复合材料的力学性能评价

Applied Journal of Physical Science Pub Date : 2021-04-30 DOI: 10.31248/ajps2021.052

O.N. Akpenyi-Aboh, O. Z. Tachere

{"title":"Evaluation of the mechanical properties of sawdust, oil bean pod filler, raffia palm fibre and CaCO3 filled/epoxy hybridized composite","authors":"O.N. Akpenyi-Aboh, O. Z. Tachere","doi":"10.31248/ajps2021.052","DOIUrl":"https://doi.org/10.31248/ajps2021.052","url":null,"abstract":"This work was carried out to develop green composite from organic materials which are cheaply available within Nigeria. This study deals with the hybridization of epoxy composite with different organic materials. Five diffident composites were produced with the hybridization of matrix, sawdust (SD), raffia palm fibre (RPF), oil bean pod filler (OBPF) and calcium carbonate (CaCO3) mixed at different volume. The composite samples were produced through the hand layup method, and their tensile and flexural properties, determined in accordance to ASTM International procedures. Results obtained from the laboratory tests indicated that the reinforcement materials greatly influenced the mechanical properties of the composite samples. The result revealed that the hybrid composite of SD, CaCO3 and RPF had the best, compared to the other composite with different reinforcement materials. Similarly, it was observed that the composite produced with SD, OBPF and RPF had better tensile and flexural properties as compared to the composite reinforced with SD and CaCO3. This study affirmed that organic materials can be used to replace inorganic material (CaCO3), hence the actualization of green composite is practically feasible","PeriodicalId":253947,"journal":{"name":"Applied Journal of Physical Science","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127371697","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

Design, development and performance evaluation of a smart office automation system 智能办公自动化系统的设计、开发及性能评估

Applied Journal of Physical Science Pub Date : 2021-04-30 DOI: 10.31248/ajps2021.050

M. Keke, J. Egerega, I. D. Emeyazia

引用次数: 2

Performance evaluation of inter-cell interference prediction in massive MIMO 大规模MIMO中小区间干扰预测的性能评价

Applied Journal of Physical Science Pub Date : 2021-04-30 DOI: 10.31248/AJPS2021.039

Abdulkadir Bakare, A. Yussuff

{"title":"Performance evaluation of inter-cell interference prediction in massive MIMO","authors":"Abdulkadir Bakare, A. Yussuff","doi":"10.31248/AJPS2021.039","DOIUrl":"https://doi.org/10.31248/AJPS2021.039","url":null,"abstract":"This paper presents inter-cell interference prediction in massive multiple input multiple output. The rapid demand for widespread multimedia services notwithstanding the deployment of 4G in Lagos, Nigeria and the urgent need to upgrade to 5G networks with downlink and uplink data capacities of not less than 300 and 60 Mbps, respectively for at least 95% penetration rate at any instantaneous time; there is a possibility of experiencing crosstalk and adjacent inter-cell interference within the receiving antennas. 5G inter-cell interference prediction scheme that employs LTE performance index using locally sourced data from Huawei Nigeria limited was presented. The performances of the currently deployed LTE network were evaluated by employing performance metrics such as uplink and downlink capacities and recommending a possible inter-cell interference mitigation technique to be implemented in the deployment of 5G network in Lagos. The identified key performance metrics used include over the air emulation, carrier to interference plus noise ratio, peak RLC throughput, coverage probability, and the map-based model. Hence, ICIC static coordination algorithm, which comprise NOICIC, Hard FFR, PFR, SFR and SFFR were analyzed. With static ICIC algorithm, the coverage probability was 78% for receiving more than 20 kbps, with cell-edge users using resources of centre-users and with edge-users of neighbouring cells using different resource block; therefore reducing interference and consequently increasing throughput when there is static ICIC coordination. Implementing the static ICIC schemes on the 5G network when deployed in Lagos will improve the average downlink throughput over what is currently attainable with the 4G network in use at the moment","PeriodicalId":253947,"journal":{"name":"Applied Journal of Physical Science","volume":"107 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130655726","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

Evaluation of the impact of chemical admixtures on the compressive strength properties of concrete 化学外加剂对混凝土抗压强度性能影响的评价

Applied Journal of Physical Science Pub Date : 2021-04-30 DOI: 10.31248/ajps2021.051

G. G. Agbi, O. Z. Tachere, H. O. Juwah

{"title":"Evaluation of the impact of chemical admixtures on the compressive strength properties of concrete","authors":"G. G. Agbi, O. Z. Tachere, H. O. Juwah","doi":"10.31248/ajps2021.051","DOIUrl":"https://doi.org/10.31248/ajps2021.051","url":null,"abstract":"This study was carried out to evaluate the effect of chemical admixtures on the compressive strength of concretes. The concretes were produced with the concrete mix ratio of 1:2:4, while water to cement (w/c) ratios of 0.35, 0.4, 0.45, 0.5 and 0.55 were adopted. Different concrete mixtures were produced using two chemical admixtures (hydroxycarboxylic acid and MasterRheobuild 1100) applied at the rate of 1.3% (weight of the cement), during the production process. Laboratory results of the fine aggregate used for the concrete production showed that it was well graded met international standards. All the concretes were produced and tested in accordance to American Society for Testing and Materials (ASTM) standard procedures. Results indicated that the concrete produced with the chemical admixtures showed better concrete performances both in the fresh and hardened state. After 28 days of casting, concrete produced with MasterRheobuild 1100 admixture had the best compressive strength (32 MPa); compared with the compressive strength of the concrete produced with the hydroxycarboxylic acid admixture (28 MPa), and the control concrete samples that had compressive strength of 25 MPa. In addition, the fresh concrete produced with chemical admixtures gave a better slump than the fresh concrete produced without any chemical admixture. Likewise, hydroxycarboxylic acid admixture performs better among the two admixtures used, given a more linear relationship between the slump and water/cement ratio. These results showed the importance of chemical admixtures when higher compressive strength becomes a vital factor in structural constructions","PeriodicalId":253947,"journal":{"name":"Applied Journal of Physical Science","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132437556","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: 1