Journal of Applied Physical Science International最新文献

{"title":"Wronskian Representation of the Solutions to the KdV Equation","authors":"Pierre Gaillard","doi":"10.56557/japsi/2024/v16i28756","DOIUrl":"https://doi.org/10.56557/japsi/2024/v16i28756","url":null,"abstract":"A method to construct solutions to the Korteweg-de-Vries (KdV) equation in terms of wronskians is given. For this, a particular type of polynomials is considered and we obtain for each positive integer n, rational solutions in terms of determinants of order n. \u0000Explicit solutions can be easily constructed and rational solutions from order 1 until order 10 are given.","PeriodicalId":322062,"journal":{"name":"Journal of Applied Physical Science International","volume":"24 25","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141685400","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":"Solitary Vortex Dynamics of 2D Bose-Einstein Condensates with Higher-Order Nonlinear Interactions","authors":"Huiping Ou, Zhijie Chen, Ying Wang, Qi Zhang, Xiaomei Liu, Chaohui Li","doi":"10.56557/japsi/2023/v15i28412","DOIUrl":"https://doi.org/10.56557/japsi/2023/v15i28412","url":null,"abstract":"For study of Continuous matter waves in Bose-Einstein condensates in nonlinear and quantum atom optics, the two-dimensional Gross-Pitaevskii equation (GPE) is chosen as the reliable model for studying the dynamics of vortices in the framework of mean-field theory. In related problems in several recent studies showing that higher-order interrelationships are an indispensable component of the GPE even at the mean-field level, by numerically estimating the vortex dynamics variables. In this paper, derive the vortex soliton solutions using the variational method and investigate the effect of higher-order nonlinear corrections on the behavior of the vortex dynamics, which are shown to have an important impact on the vortex dynamics behavior.","PeriodicalId":322062,"journal":{"name":"Journal of Applied Physical Science International","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136358507","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 Study of Formation of Sonic Black Hole in One-Dimensional Bose-Einstein Condensate","authors":"Haoquan Xu, Qingru Wang, Ying Wang, Qi Zhang, Xiaomei Liu, Chaohui Li","doi":"10.56557/japsi/2023/v15i28411","DOIUrl":"https://doi.org/10.56557/japsi/2023/v15i28411","url":null,"abstract":"Based on the one-dimensional Gross-Pitaevskii equation (GPE) model, this work studies the formation of acoustic black holes in one-dimensional Bose Einstein condensate (BEC) in harmonic oscillator external potential, and extending the applicable scenarios of the GPE model for its specific application of simulating the formation conditions of acoustic black holes in one-dimensional systems. At the same time, We deepen the understanding of the analytical formula for determining the production conditions of acoustic black holes and the evolution formula of the radius of acoustic black holes.","PeriodicalId":322062,"journal":{"name":"Journal of Applied Physical Science International","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136358371","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":"Structural and Biological Properties of 4-Dimethylamino Benzoic Acid: An Insight from the DFT Perspective","authors":"Keerthana Ravikumar, Soundhariya Segar, None Bakkiyaraj D., None Periandy S.","doi":"10.56557/japsi/2023/v15i28373","DOIUrl":"https://doi.org/10.56557/japsi/2023/v15i28373","url":null,"abstract":"The structural investigation of 4-Dimethylamino benzoic acid using FT-IR, FT-Raman, UV, and NMR spectroscopic techniques was done systematically. The vibrational assignments, IR, and Raman scattering activity were computed by the density functional theory (DFT) using the 6-311++G(d,p) basis set and the B3LYP method. Experimental and theoretical parameters were compared. According to orbital natural bond calculations, the compound's stability is due to hyper-conjugative interactions and a hydrogen-bonding network. Molecular Electrostatic Potential (MEP) is also performed. HOMO and LUMO energies have been identified. The compound was docked with Adenovirus protein ID 3N0I, and the binding energy was found to be -4.4 kcal/mol.","PeriodicalId":322062,"journal":{"name":"Journal of Applied Physical Science International","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136024246","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":"Experimental Investigation of Temperature Distribution in the Chips, Workpiece and Cutting Tool During Machining Operations","authors":"Uwabuike V. C., Nwufo O. C., Azubuike J. O., Nwaji G. N.","doi":"10.56557/japsi/2023/v15i28370","DOIUrl":"https://doi.org/10.56557/japsi/2023/v15i28370","url":null,"abstract":"High temperature values are encountered during machining processes and these high temperature values have negative influences on the tool, workpiece, chip formation mechanisms, the process efficiency and the quality of surface of the machined parts. These negative influences can be reduced drastically with the use of appropriate cutting tool with suitable depth of cut during machining operations. The studies of these thermal fields in machining are necessary and very important for the development of new technologies aiming to increase the tool lives and to reduce production costs. This work centers on measurement of temperatures in the chips, cutting tool and workpiece during turning and drilling operations using uncoated high-speed steel and coated cemented carbide cutting tools at different cutting speeds and depths of cut to ascertain the more suitable cutting tool and feed rate during machining operations. Although, the direct temperature measurement at the chip-tool interface are very complex, the turning experiments were performed on a lathe machine at varying turning speeds and depths of cut, while the drilling operation was performed on a drilling machine at different turning speeds and depths of cut. All the experiments were carried out at the mechanical Engineering workshop of Federal University of Technology, Owerri. The temperature values of chip, cutting tool and workpiece when working on brass, high-carbon steel and stainless steel were measured using digital thermocouples. The results obtained showed that uncoated high-speed steel cutting tool could not cut stainless steel and high-carbon steel at very high turning speed and depth of cut due to the excessive heat it generated at the contact area, and at very low cutting speed the temperature of the cutting tools were higher than the workpiece irrespective of the cutting tool till an increased cutting speed where temperature of workpiece became higher than the cutting tool. It is recommended that coated cemented carbide on hard materials be used during turning and drilling to ensure a negligible increase in temperature while machining, also monitor speed for required finishing and extended tool life.","PeriodicalId":322062,"journal":{"name":"Journal of Applied Physical Science International","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136362472","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":"Stroke Prediction Using Smote for Data Balancing, XGBoost and KNN Ensemble Algorithms","authors":"O. Abiodun, Andrew Ishaku Wreford","doi":"10.56557/japsi/2023/v15i18349","DOIUrl":"https://doi.org/10.56557/japsi/2023/v15i18349","url":null,"abstract":"Stroke is a pathological condition characterized by the rupture of blood vessels within the cerebral region, resulting in detrimental effects on the brain. The occurrence of stroke symptoms may arise when there is a disruption in the delivery of blood and essential nutrients to the brain. As per the World Health Organization (WHO), stroke is identified as the primary contributor to mortality and impairment on a worldwide scale. The early identification of stroke symptoms is of utmost importance as it provides vital information for predicting the likelihood of a stroke occurring and encourages the adoption of a healthy lifestyle. This study utilized two ensemble machine learning (ML) algorithms, namely KNN and XGBoost, which were combined in a stacked approach to create and evaluate the models. The primary goal was to establish a robust framework for predicting long-term stroke risk. Hence, the major contributions of this study are the introduction of data balancing techniques using smote algorithm and more importantly the stacking of the KNN and XGBoost algorithm, which exhibits high performance as validated by various metrics, including precision, recall, f-measure, and accuracy. Experimental results demonstrate that the stacked algorithm surpasses other applied ensemble methods, achieving an impressive accuracy of 97%, with a recall of 95% and 98%, precision of 98% and 95%, and an f1 score of 97%.","PeriodicalId":322062,"journal":{"name":"Journal of Applied Physical Science International","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126421723","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 Combustion Profiles of the Lafia-Obi Coals: Implication for Electricity Power Generation","authors":"A. Mangs, A. Sallau, A. Ajol, L. W. Nimze, C. M. Mangai, U. Lar, S. Yusuf","doi":"10.56557/japsi/2023/v15i18313","DOIUrl":"https://doi.org/10.56557/japsi/2023/v15i18313","url":null,"abstract":"This paper aims to understand the combustion profiles of the coal samples in the Lafia-Obi axis, Middle Benue Trough (MBT), for consideration as a potential energy source for electricity power generation. Despite efforts and commitment from renewable energy sources to account for a significant share of the total electricity supply, coal remains the most important electricity-producing fuel globally. Currently, there is growing energy demand, as many industrialized and developing countries continue to rely on coal for electricity power generation in the next few decades to come. The Benue Trough is a failed arm of the triple ‘RRr’ junction of an inland sedimentary basin that extends in a NE-SW direction from the Gulf of Guinea in the south, to the Chad Basin in the north. A total of nine (9) grab coal samples were obtained from 3 coal localities in the Lafia-Obi environment, the proximate analysis was conducted on the coal samples using a Perkin Elmer Thermogravimetric Analyzer. The results show the coals have high volatile matter content, low ash yield, and high calorific value (21.97 MJ/Kg, on areal average). Ultimate data shows that Sulphur values are generally low (areal average of 0.90 %). Vitrinite reflectance measurements were carried out largely on petrographic pellet blocks revealing that they are generally dominated by vitrinite maceral, with an areal average of 80.6 % by volume (mineral-matter free). Lafia-Obi coal is a medium-rank C bituminous coal with high vitrinite and fusinite. The findings obtained from this paper show that the coals in the study area can be used for electricity power generation except for sample 01 with high ash content of 73.03 weight %.","PeriodicalId":322062,"journal":{"name":"Journal of Applied Physical Science International","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129635004","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 Corrosion of Mild Steel in Tomato and Pepper Environment Using Factorial Experiment Design","authors":"Chukwuemeka C. Kingsley, R. Uche, J. O. Azubuike, Ekpechi Arinze","doi":"10.56557/japsi/2023/v15i18298","DOIUrl":"https://doi.org/10.56557/japsi/2023/v15i18298","url":null,"abstract":"Investigation on the effect of corrosion of mild steel immersed in tomatoes and pepper fluid has been successfully carried out. The study employed the traditional weight loss method to determine the weight loss in the metals during the exposure period. The experimental corrosion rate of the mild steel were determined from data from the weight loss. The exposure period lasted for 35 days taking 7 days interval to determine the weight loss in the coupons.  pH and microbial test were also examined. pH examination was carried out to measure the hydrogen ion concentration and to define the alkalinity or acidity of the solution. The research employed the design of experiment module of a Minitab software to analyze the corrosion effect of mild steel in tomatoes and pepper environment. The result show that the pH of the tomato was acidic at 4.20 within the first 7 days of exposure but moved to neutrality and finally alkalinity at 9.31 at the end of the experiment, while the pH of the pepper fluctuated between 5.29 and 5.45 which is also shows acidic. Both media moved to alkalinity after 35 days of exposure. The results revealed that the highest corrosion rate was found in mild steel immersed in tomato (0.3078mm/y). It was evident that more bacteria were discovered in the pepper than in the tomato during the exposure period. The experimental modelling used was done on a 95% confidence level and the result explained approximately 73.96% of the variability in the response variable corrosion Rate for mild steel.","PeriodicalId":322062,"journal":{"name":"Journal of Applied Physical Science International","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130075864","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":"Experimental Study of the Thermal and Mechanical Properties of Epoxy-Reinforced Composites","authors":"D. A. Ekpechi, O. Obiukwu, E. Nwankwo, V. C. Okpalaku-Nath","doi":"10.56557/japsi/2023/v15i18192","DOIUrl":"https://doi.org/10.56557/japsi/2023/v15i18192","url":null,"abstract":"The menace from the lingering global warming and climate change, has been traced toward municipal solid waste (MSW), synthetic, and flame byproduct wastes as one leading cause of the carbon deposits at the ozone layer, which has spiked researchers toward converting wastes into useful material. Five samples [E, S1, S2, S3, and S4] of composite material on the different percentage of composition was developed using coconut shell fiber municipal solid waste (MSW), silicon carbide (SiC), aluminum oxide (Al2O3), and epoxy, developed by hand-layup and compression molding manufacturing process. The developed specimens were subjected to mechanical, thermal, and water absorption tests using suitable apparatus. From the result obtained, specimen S1 which polymer material (epoxy) was reinforced with coconut shell fiber, showcased the impact of natural waste fiber on improving the polymer material’s thermal and mechanical strength. 50.45MPa, 32.33, and 0.25W/mK values of tensile, hardness, and thermal conductivity strength respectively, were observed on the resulting test on sample S1, which is satisfactory compared to the value results from sample E, having only polymer material. Although sample E possesses the highest impact strength (15.2 J/m2) and water absorption values, due to the absence reinforce fiber. Natural synthetic fibers incorporation in the specimens had a huge impact on thermal and mechanical strength, such as seen from specimen S2 - S4 having a thermal conductivity of 0.45W/mK, hardness value of 44.52, and tensile strength of 140.44Mpa. The test has proven some application on solid systems, which invariable convert coconut shell municipal waste materials to wealth-creating commodities, thereby promoting the application of local content in material production.","PeriodicalId":322062,"journal":{"name":"Journal of Applied Physical Science International","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126137273","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":"RELATIVISTIC MASS OF SPINNING BLACK HOLES IN AGN","authors":"Dipo Mahto, Ajay Kumar, R. Paswan","doi":"10.56557/japsi/2023/v15i18064","DOIUrl":"https://doi.org/10.56557/japsi/2023/v15i18064","url":null,"abstract":"Aims:  To calculate the relativistic mass of spinning black holes in AGN on the basis of model formulated with the help of the model for estimation of mass of black holes M=rv2/G [1,2] and the model for variation of Universal constant (G) with spinning velocity of black holes  in the strong gravitational field as proposed by Mahto et al. [3]. \u0000Study Design: The data for the mass of spinning black holes in AGN in ranging from 106 to 109.5 solar masses [2] and spinning velocity from 50 to 100% of velocity of light [4] and radius of event horizon corresponding to the masses from 1.475x109m to 1.475x1012m [5] have been used to calculate the required results. This work is a supplement part of the research paper entitled: Relativistic Mass of Spinning Black Holes in XRBs published in Research Square (preprint, 2023) and communicated to Astrophysics and Space Science (2022). \u0000Place and Duration of Study: Department of Physics, Marwari College under TMBU Bhagalpur from January 2021 to September 2023 and Bhagalpur College of Engineering, Bhagalpur under DST, Govt. of Bihar, India from October, 2023 to January 2023. \u0000Methodology: The present work is completely theoretical based on specific model and data analysis. The work is completed at the residence of author as well as personal chamber of the working institution. \u0000Results: The work gives the calculation for the relativistic mass of spinning black holes in the case of AGN to give the confirmation of the validity of special relativity. \u0000Conclusion:  The present work gives the validity in support of theory of relativity in AGN as well as proposed model and can be frequently used for the estimation of the relativistic mass of AGN SBHs.","PeriodicalId":322062,"journal":{"name":"Journal of Applied Physical Science International","volume":"381 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130440867","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}