Benson Turyasingura, W. Tumwesigye, Atuhaire Abraham, J. T. Tumushabe, R. Akatwijuka
Worldwide, information is needed about the social landscape management as there is no known studies that have documented how climate-smart landscape approaches improve soil and water status. In Sub-Saharan Africa, effective social landscape governance necessitates a certain amount of social capital, including trust and agreed-upon standards. Climate-smart landscapes are key to successful soil and water management but little effort have been made to critically improve effective soil and water resources. The study was guided by the specific objectives, which include examining equitable climate-smart landscapes and finding out the major challenges facing the implementation of climate-smart landscapes. Using "landscape governance" AND "climate smart landscape," 31 papers (31) were obtained from the Web of Science (WOS) and twenty-nine (27) from the Scopus databases using search engines from (1992-2022). On equitable climate-smart landscapes, it was found that multi-stakeholder participation in landscape management is an iterative and changing process that can assist in addressing and resolving disputes as well as facilitating fair negotiation procedures for underrepresented and minority groups. Proper planning and the implementation of a comprehensive planning framework that links various planning activities and decision-making processes are required for landscape approaches to be successful. The major challenges included policies and institutions, financial difficulties in the conservation of natural resources, and socio-economic issues. The novelty from this study is to inform policy makers on climate-smart landscape approaches to ease soil and water management.
{"title":"A literature review of climate-smart landscapes as a tool in soil-water management in Sub-Saharan Africa","authors":"Benson Turyasingura, W. Tumwesigye, Atuhaire Abraham, J. T. Tumushabe, R. Akatwijuka","doi":"10.54392/irjmt2322","DOIUrl":"https://doi.org/10.54392/irjmt2322","url":null,"abstract":"Worldwide, information is needed about the social landscape management as there is no known studies that have documented how climate-smart landscape approaches improve soil and water status. In Sub-Saharan Africa, effective social landscape governance necessitates a certain amount of social capital, including trust and agreed-upon standards. Climate-smart landscapes are key to successful soil and water management but little effort have been made to critically improve effective soil and water resources. The study was guided by the specific objectives, which include examining equitable climate-smart landscapes and finding out the major challenges facing the implementation of climate-smart landscapes. Using \"landscape governance\" AND \"climate smart landscape,\" 31 papers (31) were obtained from the Web of Science (WOS) and twenty-nine (27) from the Scopus databases using search engines from (1992-2022). On equitable climate-smart landscapes, it was found that multi-stakeholder participation in landscape management is an iterative and changing process that can assist in addressing and resolving disputes as well as facilitating fair negotiation procedures for underrepresented and minority groups. Proper planning and the implementation of a comprehensive planning framework that links various planning activities and decision-making processes are required for landscape approaches to be successful. The major challenges included policies and institutions, financial difficulties in the conservation of natural resources, and socio-economic issues. The novelty from this study is to inform policy makers on climate-smart landscape approaches to ease soil and water management.","PeriodicalId":14412,"journal":{"name":"International Research Journal of Multidisciplinary Technovation","volume":"28 5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77950544","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}
Hassan Ibrahim Mohammed, Shaiban Mohamed Ahmed Mohamed, Omran Musa Abbas, Abdelkarim D. Elfadil
Land leveling or land grading of surface irrigated fields improve irrigation water distribution and application efficiencies, conserve water and increases crop productivity. Land formation for irrigation face many constraints (ensuring proper slopes, prevention of flood, ensuring canal water command over the field, optimizing earthwork, minimizing truck travel distances, proper equipment utilization). Design engineers traditionally, perform site formation design manually by plane shape, least squire or linear programming methods. Such methods are with different characteristics. The main objective this study is to select and compare performance of these three design methods for proper land leveling design. Consequently, the basic theory of these alternative design methods are reviewed and their performance using data surveyed from five fields in Khartoum North-Sudan, each with different soil surface topographic configurations, is analyzed. The statistical analysis revealed that the linear programming method is the most appropriate design method. Employing the linear programming design method revealed that design slopes in row and cross row directions are within the acceptable range (0.1 to 0.5, the ratio of Cut/fill volumes is within the recommended range (1.1 to 1.3), uniformity of distribution of design elevations of grid points are acceptable and within the target limits (80%), while their deviation is at 80% of grid points around the mean before leveling.
{"title":"Selection of Optimum Land Leveling Design Method for Surface Irrigation","authors":"Hassan Ibrahim Mohammed, Shaiban Mohamed Ahmed Mohamed, Omran Musa Abbas, Abdelkarim D. Elfadil","doi":"10.54392/irjmt2321","DOIUrl":"https://doi.org/10.54392/irjmt2321","url":null,"abstract":"Land leveling or land grading of surface irrigated fields improve irrigation water distribution and application efficiencies, conserve water and increases crop productivity. Land formation for irrigation face many constraints (ensuring proper slopes, prevention of flood, ensuring canal water command over the field, optimizing earthwork, minimizing truck travel distances, proper equipment utilization). Design engineers traditionally, perform site formation design manually by plane shape, least squire or linear programming methods. Such methods are with different characteristics. The main objective this study is to select and compare performance of these three design methods for proper land leveling design. Consequently, the basic theory of these alternative design methods are reviewed and their performance using data surveyed from five fields in Khartoum North-Sudan, each with different soil surface topographic configurations, is analyzed. The statistical analysis revealed that the linear programming method is the most appropriate design method. Employing the linear programming design method revealed that design slopes in row and cross row directions are within the acceptable range (0.1 to 0.5, the ratio of Cut/fill volumes is within the recommended range (1.1 to 1.3), uniformity of distribution of design elevations of grid points are acceptable and within the target limits (80%), while their deviation is at 80% of grid points around the mean before leveling.","PeriodicalId":14412,"journal":{"name":"International Research Journal of Multidisciplinary Technovation","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82518747","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}
Ehouman J.M, Zougranaa Y, Lamoussa O, Ghislain A.Y, Z. N.
In this study, the concentrations (mg / L) of trace metal elements (TME) in an effluent from an industrial soap and cosmetic unit (SCI11) were evaluated. Four (4) composite samples and a witness sample (1) were collected. Nine (9) physicochemical parameters (T, pH, EH, SS, Al, Cr, Fe, Pb, and Zn) were analyzed according to AFNOR standards.The results showed that these effluents are characterized by high mean concentrations of suspended solids (266.75 ± 147.20 mg / L and Cr (0.678 ± 0.068 mg / L) which are far beyond the reference values of the Service Inspection of Classified Installations (SIIC). On the other hand, the mean concentrations of TME Fe, Al, Zn, respectively at 0.585 ± 0.03 mg / L, 0.618 ± 0.030 mg / L, and 0.244 ± 0.015 mg / L are in agreement with the SIIC reference values. The study also found that the effluent is behaving like a reducer with a mean EH redox potential of (-13 ± 1.87 mV). Mean values of pH (6.67 ± 0.60) and temperature T (29.58 ± 0.82 ° C) are in the order of the values recommended by the SIIC. Overall, the PCA analysis has shown that this effluent is a source of TME pollution and physical SS pollution.
{"title":"Assessment of Soap and Cosmetic Effluents quality in Metallic Trace Elements from Yopougon Industrial Area, Abidjan, Ivory Coast","authors":"Ehouman J.M, Zougranaa Y, Lamoussa O, Ghislain A.Y, Z. N.","doi":"10.54392/irjmt2312","DOIUrl":"https://doi.org/10.54392/irjmt2312","url":null,"abstract":"In this study, the concentrations (mg / L) of trace metal elements (TME) in an effluent from an industrial soap and cosmetic unit (SCI11) were evaluated. Four (4) composite samples and a witness sample (1) were collected. Nine (9) physicochemical parameters (T, pH, EH, SS, Al, Cr, Fe, Pb, and Zn) were analyzed according to AFNOR standards.The results showed that these effluents are characterized by high mean concentrations of suspended solids (266.75 ± 147.20 mg / L and Cr (0.678 ± 0.068 mg / L) which are far beyond the reference values of the Service Inspection of Classified Installations (SIIC). On the other hand, the mean concentrations of TME Fe, Al, Zn, respectively at 0.585 ± 0.03 mg / L, 0.618 ± 0.030 mg / L, and 0.244 ± 0.015 mg / L are in agreement with the SIIC reference values. The study also found that the effluent is behaving like a reducer with a mean EH redox potential of (-13 ± 1.87 mV). Mean values of pH (6.67 ± 0.60) and temperature T (29.58 ± 0.82 ° C) are in the order of the values recommended by the SIIC. Overall, the PCA analysis has shown that this effluent is a source of TME pollution and physical SS pollution.","PeriodicalId":14412,"journal":{"name":"International Research Journal of Multidisciplinary Technovation","volume":"52 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80448157","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}
Kingsley Onyekachi Anyanwu, H. O. Nzei, B. C. Agwah, P. C. Eze, Vi Ehirim
This study has considered six steel scrap recycling plants, tagged A, B, C, D, E, F. The production process for each of the plants considered was separately observed and recorded. The investigation report revealed that none of the plant was following the due process involved in modern steel scrap recycling. Hence, a sustainable production flow system, deemed to be effective is proposed in this paper. The production data of each section was collected alongside the manpower and pollution control data. The data were analyzed mathematically using the models developed in this study. From the results obtained, pollution control was least in melting section with pollution control index of 33.8%, and highest in heat treatment with index of 51.9%. Comparatively, pollution control was least (37%) in plant A and highest (50.6%) in plant F. Also, manpower was least (32.4%) in plant A and highest (44.6%) in plant E. Mechanization was least (55.4%) in plant E and highest (73.2%) in plant B. Findings further indicated that melting section was running almost full capacity in Plant E (348 against 350 tons per day) and Heat treatment section was also running almost full capacity (342 against 350 tons per day in Plant C). The rest were running much below their design capacities.
本研究考虑了六个废钢回收厂，标记为A, B, C, D, E, f。每个工厂的生产过程被单独观察和记录。调查报告显示，该工厂没有一家遵循现代废钢回收的正当程序。因此，本文提出了一个可持续的、被认为是有效的生产流程系统。收集了各区段的生产数据以及人力和污染控制数据。使用本研究中开发的模型对数据进行数学分析。结果表明，熔炼段污染控制程度最低，污染控制指数为33.8%，热处理段污染控制程度最高，污染控制指数为51.9%。相比之下，A厂污染控制最少(37%)，f厂污染控制最高(50.6%)。机械化程度在E工厂最低(55.4%)，在b工厂最高(73.2%)。调查结果进一步表明，E工厂熔化部门几乎满负荷运转(348人，每天350吨)，热处理部门也几乎满负荷运转(342人，每天350吨)。其余部门的运转远远低于其设计能力。
{"title":"A Sustainable Approach to Steel Scrap Recycling and Management (Nigeria as Case Study)","authors":"Kingsley Onyekachi Anyanwu, H. O. Nzei, B. C. Agwah, P. C. Eze, Vi Ehirim","doi":"10.54392/irjmt2311","DOIUrl":"https://doi.org/10.54392/irjmt2311","url":null,"abstract":"This study has considered six steel scrap recycling plants, tagged A, B, C, D, E, F. The production process for each of the plants considered was separately observed and recorded. The investigation report revealed that none of the plant was following the due process involved in modern steel scrap recycling. Hence, a sustainable production flow system, deemed to be effective is proposed in this paper. The production data of each section was collected alongside the manpower and pollution control data. The data were analyzed mathematically using the models developed in this study. From the results obtained, pollution control was least in melting section with pollution control index of 33.8%, and highest in heat treatment with index of 51.9%. Comparatively, pollution control was least (37%) in plant A and highest (50.6%) in plant F. Also, manpower was least (32.4%) in plant A and highest (44.6%) in plant E. Mechanization was least (55.4%) in plant E and highest (73.2%) in plant B. Findings further indicated that melting section was running almost full capacity in Plant E (348 against 350 tons per day) and Heat treatment section was also running almost full capacity (342 against 350 tons per day in Plant C). The rest were running much below their design capacities.","PeriodicalId":14412,"journal":{"name":"International Research Journal of Multidisciplinary Technovation","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88747735","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 aim of the study was to investigate the effect of an adjustable vacuum distribution device on seed pick-up similarity of a multiple-rows pneumatic plate metering device due to unequal rows performance. A completely vacuum opened angle of the device (30°), Six vacuum opening angles (5°, 10°, 15°, 20°, 25° and 30°) and different angles set up on rows (4°, 7°, 10° and 30° through row 1,2,3, and 4, respectively) were separately examined at six rotating speeds. Results revealed that under same speed and same vacuum opening angle, an increase in vacuum provided more consistent rows pick-up, while increase in angle increased rows pick-up coupled with the increase in their variation. Row1 and row4 generally tend to have the highest and lowest seed pick-up, respectively, under most of investigated angles and speeds. Rows consistency CV declined under the increase of both opening angle and velocity. Results of different rows angles set up were found to be better than those of the same angle. Different rows angles resulted in better rows CV value of 2.01%, 1.78%, 1.89%, 1.34%, 1.77% and 2.45% at speed of 5, 10,15,20,25 and 30 r.min-1, respectively. Results concluded that vacuum distribution device could be acceptably used for improving rows performance, but further studies are necessary to develop an outside-control method for easy application.
{"title":"An Evaluation of a Vacuum Distribution Device for Seed Pick-Up Regularity of A Multiple -Rows Pneumatic Plate","authors":"Elebaid Jabir, Abdelkarim Dafaalla Alfadilb","doi":"10.54392/irjmt2262","DOIUrl":"https://doi.org/10.54392/irjmt2262","url":null,"abstract":"The aim of the study was to investigate the effect of an adjustable vacuum distribution device on seed pick-up similarity of a multiple-rows pneumatic plate metering device due to unequal rows performance. A completely vacuum opened angle of the device (30°), Six vacuum opening angles (5°, 10°, 15°, 20°, 25° and 30°) and different angles set up on rows (4°, 7°, 10° and 30° through row 1,2,3, and 4, respectively) were separately examined at six rotating speeds. Results revealed that under same speed and same vacuum opening angle, an increase in vacuum provided more consistent rows pick-up, while increase in angle increased rows pick-up coupled with the increase in their variation. Row1 and row4 generally tend to have the highest and lowest seed pick-up, respectively, under most of investigated angles and speeds. Rows consistency CV declined under the increase of both opening angle and velocity. Results of different rows angles set up were found to be better than those of the same angle. Different rows angles resulted in better rows CV value of 2.01%, 1.78%, 1.89%, 1.34%, 1.77% and 2.45% at speed of 5, 10,15,20,25 and 30 r.min-1, respectively. Results concluded that vacuum distribution device could be acceptably used for improving rows performance, but further studies are necessary to develop an outside-control method for easy application.","PeriodicalId":14412,"journal":{"name":"International Research Journal of Multidisciplinary Technovation","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85402297","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}
Lijalem Gebrehiwet, S. Tilahun, Nathnael Geneti, Yeshurun Alemayehu
Weight estimation of materials from their characteristic density has a great advantage on analyzing the basic weight parameter put at initial stage of the project. During the detail design stage, each component is designed with basic dimensions and material selection. The selected weight will be verified with other materials such as steel, aluminum and composites. The total weight of the Quadcopter when made of steel, aluminum and composites are compared with the reference value of parameter, total component weight and then the bets material will be recommended for the Quadcopter airframe. The composite materials are found to be light and strong when compared to steel and aluminum frames. If we use this material the Quadcopter will have more flight time for spraying.
{"title":"Quadcopter Theoretical Weight Estimation and Comparison during Design Phase","authors":"Lijalem Gebrehiwet, S. Tilahun, Nathnael Geneti, Yeshurun Alemayehu","doi":"10.54392/irjmt2261","DOIUrl":"https://doi.org/10.54392/irjmt2261","url":null,"abstract":"Weight estimation of materials from their characteristic density has a great advantage on analyzing the basic weight parameter put at initial stage of the project. During the detail design stage, each component is designed with basic dimensions and material selection. The selected weight will be verified with other materials such as steel, aluminum and composites. The total weight of the Quadcopter when made of steel, aluminum and composites are compared with the reference value of parameter, total component weight and then the bets material will be recommended for the Quadcopter airframe. The composite materials are found to be light and strong when compared to steel and aluminum frames. If we use this material the Quadcopter will have more flight time for spraying.","PeriodicalId":14412,"journal":{"name":"International Research Journal of Multidisciplinary Technovation","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83486447","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 practice, the slab foundation is used widely in civil engineering. Besides the concrete material, fiber concrete is applied more popular in the slab foundations. Determining the ultimate load of the slab foundations is a complex problem due to the relation of the soil-structure interaction (SSI) problem, which depends on both the structures and the subsoil characteristics. ANSYS is a finite element software which is a reliable and effective technique to simulate the structure model. This paper aims to determine the ultimate load of the fiber-reinforced concrete slab on the ground subjected to the concentrated load by ANSYS software. The nonlinear material of the structure and the subsoil will be considered in this work. The validation test of the numerical model will be through the experiment data. This study has shown that the numerical model is reliable for the structure design.
{"title":"The Ultimate Load of the Fiber-Reinforced Concrete Slab Foundations Subjected the Concentrated Load by ANSYS","authors":"Dang B. Tran, R. Čajka","doi":"10.54392/irjmt2253","DOIUrl":"https://doi.org/10.54392/irjmt2253","url":null,"abstract":"In practice, the slab foundation is used widely in civil engineering. Besides the concrete material, fiber concrete is applied more popular in the slab foundations. Determining the ultimate load of the slab foundations is a complex problem due to the relation of the soil-structure interaction (SSI) problem, which depends on both the structures and the subsoil characteristics. ANSYS is a finite element software which is a reliable and effective technique to simulate the structure model. This paper aims to determine the ultimate load of the fiber-reinforced concrete slab on the ground subjected to the concentrated load by ANSYS software. The nonlinear material of the structure and the subsoil will be considered in this work. The validation test of the numerical model will be through the experiment data. This study has shown that the numerical model is reliable for the structure design.","PeriodicalId":14412,"journal":{"name":"International Research Journal of Multidisciplinary Technovation","volume":"89 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73554410","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}
W. Tumwesigye, Viola Kishoin, Benson Turyasingura, Majaliwa Mwanjalolo Jackson-Gilbert
The review aimed at understanding landscape diversity in the face of global population pressure, agricultural land shortages, food insecurity, and climate insecurity. We used published literature to determine whether landscape diversity improves resilience to climate change. Literature searches were performed using the Science Direct database, Google Scholar search engine, and the professional network ResearchGate using keywords. Land degradation, soil resilience, and natural resources from 2000 to 2019. 120 publications were searched, including journal articles, reports, and book chapters. Of these, 68 were considered more relevant and all were read and considered in writing this review. Climate change, food insecurity, and land degradation have been established to be major challenges for developing countries leading to the loss of genetic diversity. Our results show that the loss of proper habitat may allow fast-growing invaders to occupy the remaining limited resources. Therefore, alien species may accelerate invasion under human-induced land-use changes during times of global change. The time lag between range expansion and habitat loss has been thwarted. A golden window to prevent the spread of alien species established in the habitat.
{"title":"Landscape Diversity Enhances Climate Change Resilience: A Review","authors":"W. Tumwesigye, Viola Kishoin, Benson Turyasingura, Majaliwa Mwanjalolo Jackson-Gilbert","doi":"10.54392/irjmt2252","DOIUrl":"https://doi.org/10.54392/irjmt2252","url":null,"abstract":"The review aimed at understanding landscape diversity in the face of global population pressure, agricultural land shortages, food insecurity, and climate insecurity. We used published literature to determine whether landscape diversity improves resilience to climate change. Literature searches were performed using the Science Direct database, Google Scholar search engine, and the professional network ResearchGate using keywords. Land degradation, soil resilience, and natural resources from 2000 to 2019. 120 publications were searched, including journal articles, reports, and book chapters. Of these, 68 were considered more relevant and all were read and considered in writing this review. Climate change, food insecurity, and land degradation have been established to be major challenges for developing countries leading to the loss of genetic diversity. Our results show that the loss of proper habitat may allow fast-growing invaders to occupy the remaining limited resources. Therefore, alien species may accelerate invasion under human-induced land-use changes during times of global change. The time lag between range expansion and habitat loss has been thwarted. A golden window to prevent the spread of alien species established in the habitat.","PeriodicalId":14412,"journal":{"name":"International Research Journal of Multidisciplinary Technovation","volume":"37 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82679215","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}
PmAP and PmAP/WO3 composite are synthesized by chemical oxidation polymerization process. Synthesized materials are investigated by UV Visible, SEM and cyclic-voltagram (CV) techniques. SEM study of as prepared materials is indicated formation of different sized crystals (small and aggregated). In UV Visible spectra analyses, both transitioned (i.e., π-π* transition and charge transfer of polaron band) are observed. Tauc expression is used to estimate optical band gap. Estimated optical band gap is to be 3.09 eV. Oxidation-reduction potential profile is detected in cyclic voltammetry (CV) analyses of PmAP and PmAP/WO3 composite.
{"title":"Investigation of Electrochemical Performance of PmAP/WO3 Composite","authors":"M. Panigrahi","doi":"10.54392/irjmt2251","DOIUrl":"https://doi.org/10.54392/irjmt2251","url":null,"abstract":"PmAP and PmAP/WO3 composite are synthesized by chemical oxidation polymerization process. Synthesized materials are investigated by UV Visible, SEM and cyclic-voltagram (CV) techniques. SEM study of as prepared materials is indicated formation of different sized crystals (small and aggregated). In UV Visible spectra analyses, both transitioned (i.e., π-π* transition and charge transfer of polaron band) are observed. Tauc expression is used to estimate optical band gap. Estimated optical band gap is to be 3.09 eV. Oxidation-reduction potential profile is detected in cyclic voltammetry (CV) analyses of PmAP and PmAP/WO3 composite.","PeriodicalId":14412,"journal":{"name":"International Research Journal of Multidisciplinary Technovation","volume":"38 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81946054","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}
Starting voltage and current transients in slip energy recovery drives (SERD) may damage the stator and rotor windings. The resulting torque oscillations damage the induction machine mechanical parts. In this paper three schemes for damping starting transients and torque oscillations are proposed. In the first scheme a parallel RL impedance is connected between the supply and the stator coils, in the second scheme a parallel RL impedance is added in the rotor circuit, and in the third scheme the two impedances are connected simultaneously. Transient performance is simulated and the results of the three schemes are compared. Also, the effect of each proposed scheme on the steady state values of the SERD currents, voltages, and electric torque is studied and demonstrated. Lower current and voltage transients, and lower torque oscillations resulted in all schemes, with optimum transient performance observed when adding the two impedances simultaneously.
{"title":"Mitigation of Starting Transients in Slip-Energy Recovery Drives","authors":"Sanaa M I Amer, Mona N Eskander","doi":"10.54392/irjmt2245","DOIUrl":"https://doi.org/10.54392/irjmt2245","url":null,"abstract":"Starting voltage and current transients in slip energy recovery drives (SERD) may damage the stator and rotor windings. The resulting torque oscillations damage the induction machine mechanical parts. In this paper three schemes for damping starting transients and torque oscillations are proposed. In the first scheme a parallel RL impedance is connected between the supply and the stator coils, in the second scheme a parallel RL impedance is added in the rotor circuit, and in the third scheme the two impedances are connected simultaneously. Transient performance is simulated and the results of the three schemes are compared. Also, the effect of each proposed scheme on the steady state values of the SERD currents, voltages, and electric torque is studied and demonstrated. Lower current and voltage transients, and lower torque oscillations resulted in all schemes, with optimum transient performance observed when adding the two impedances simultaneously.","PeriodicalId":14412,"journal":{"name":"International Research Journal of Multidisciplinary Technovation","volume":"58 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72559175","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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