FES Journal of Engineering Sciences最新文献

The importance of evaluation in achieving the educational goals of mathematics for the eighth grade in the state of Khartoum 评价在实现喀土穆州八年级数学教育目标中的重要性

FES Journal of Engineering Sciences Pub Date : 2022-10-03 DOI: 10.52981/fjes.v11i2.2288

Amna Elemam

{"title":"The importance of evaluation in achieving the educational goals of mathematics for the eighth grade in the state of Khartoum","authors":"Amna Elemam","doi":"10.52981/fjes.v11i2.2288","DOIUrl":"https://doi.org/10.52981/fjes.v11i2.2288","url":null,"abstract":"كلمة التقويم اتت من الفعل قوّم بمعنى صحّح وصوّب وعدّل. والتقويم التربوي جزء من العملية التعليمية يبدأ بالقياس وطرح الأسئلة عن المهارة في الأداء والواجبات والالتزام بها وعمل امتحانات كتابية وشفهية وجمع المعلومات حول الحقيقة التربوية المتعلقة بالتعليم ثم تحليلها بطريقة علمية وتربوية من أجل تصويب الوضع للحصول على أفضل النتائج التعليمية. وهو عملية أساسية في العملية التربوية حيث يساعد المتعلم في رؤية نقاط ضعفه ومدى تقدمه فيما يتعلمه كما يساعد المعلم في التعرّف على مدى نجاحه في تحقيق الاهداف التدريسية لتطوير عمله و اتخاذ القرارات بشأنها لمعالجة جوانب الضعف وتهيئة المناخ السليم المتكامل من خلال إعادة النظر في تنظيم البيئة التربوية. تهدف هذه الدراسة لقياس فعالية التقويم في تحقيق الأهداف التربوية لمادة رياضيات الصف الثامن أساس - الحلقة الثالثة. في هذا البحث طبقت الاستبانه على معلمي مادة الرياضيات للصف الثامن بمرحلة الاساس بمحلية أمبدة بولاية الخرطوم، وبلغ عدد العينة 90 معلماً ومعلمة. تمت دراسة وتحليل عينة البحث بعناية وكانت نتائج الدراسة تثبت ارتباط التقويم بتحقيق الأهداف التربوية لمادة الرياضيات.","PeriodicalId":137077,"journal":{"name":"FES Journal of Engineering Sciences","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131400760","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

Optimizing the PID Controller by Using the Genetic Algorithm 采用遗传算法对PID控制器进行优化

FES Journal of Engineering Sciences Pub Date : 2022-04-11 DOI: 10.52981/fjes.v11i2.1929

M. Abdurrahman, Moamer Abdullbagi Omer Nourain, Mohammed Omer Abdulsalam Muhieeddeen, Omer Hafiz ALnour Mahjoub, Manareldeen Adil Hassan Ahmed

引用次数: 0

Investigation on Coil Geometry in WPT Systems for Charging EVs Applications 电动汽车充电用WPT系统线圈几何结构研究

FES Journal of Engineering Sciences Pub Date : 2022-01-13 DOI: 10.52981/fjes.v11i1.1770

K. E. Elnail

引用次数: 0

Feasibility of recycling concrete construction waste in environmental and economic sides 混凝土建筑垃圾回收利用在环境和经济方面的可行性

FES Journal of Engineering Sciences Pub Date : 2021-12-15 DOI: 10.52981/fjes.v11i1.503

E. Hasan

{"title":"Feasibility of recycling concrete construction waste in environmental and economic sides","authors":"E. Hasan","doi":"10.52981/fjes.v11i1.503","DOIUrl":"https://doi.org/10.52981/fjes.v11i1.503","url":null,"abstract":"n light of the conditions experienced by Syria and due to the destruction and demolition of its buildings built up rubble and occupied a large area of its territory. \u0000Therefore, it was necessary to develop an appropriate strategy to study these debris and provide the ideal solutions to be able to benefit from them as much as possible and thus mitigate the harmful impact on the environment and the surrounding environment. \u0000The work is divided into two parts: \u0000First: The study focuses on one of the mechanisms of benefiting from the recycled aggregate by using them in producing concrete, after studying their characteristics(Sieve Analysis-density- Absorption) and then mixing them with natural aggregate as replacement of natural coarse aggregate at different rates(15-30-45-75-100)%. \u0000Six concrete cubes were made for each mixture and 3 cubes were broken after 7 days and the other after 28 days . \u0000it was concluded The relationship between the percentage of recycled aggregates and compressive strength, as well as the relationship between the percentage of stones and the rate of Absorption \u0000The results showed that the acceptable percentage of replacement of natural aggregates with recycled aggregates may reach 100% with the recording of values of resistance of up to 21.9Mpa . \u0000Second :The environmental and economic feasibility of using recycled aggregates has been studied the results showed that use 75% of the recycled aggregates in structural concrete works will reduce energy consumption and carbon dioxide emissions by 28% and 33%, respectively, and the economic saving rate is 63.71%. . \u0000 \u0000Through this study two objectives can be achieved: \u0000 First: removing large quantities of environmental pollution sources resulting from these wastes and thus achieving an environmental goal. \u0000Second: Provide other sources of concrete aggregates and thus protect the natural quarries and achieve an economic goal.","PeriodicalId":137077,"journal":{"name":"FES Journal of Engineering Sciences","volume":"148 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126067570","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

KNN Algorithm Used for Heart Attack Detection 用于心脏病发作检测的KNN算法

FES Journal of Engineering Sciences Pub Date : 2021-12-15 DOI: 10.52981/fjes.v11i1.758

Ibrahima Bah

引用次数: 3

USRP Implementation of Spectrum Sensing OFDM-Based Cognitive Radio Networks Using Energy Ratio Algorithm 基于能量比算法的频谱感知ofdm认知无线网络USRP实现

FES Journal of Engineering Sciences Pub Date : 2021-12-05 DOI: 10.52981/fjes.v11i1.803

A. Ate, Sohila Mohamed

引用次数: 1

Interconnection In the Convergence Era (IP-BASED Interconnection Regulation Challenges) 融合时代的互联互通(基于ip的互联监管挑战)

FES Journal of Engineering Sciences Pub Date : 2021-10-16 DOI: 10.52981/fjes.v10i1.804

A. Ate, Sohila Mohamed

{"title":"Interconnection In the Convergence Era (IP-BASED Interconnection Regulation Challenges)","authors":"A. Ate, Sohila Mohamed","doi":"10.52981/fjes.v10i1.804","DOIUrl":"https://doi.org/10.52981/fjes.v10i1.804","url":null,"abstract":"The IP age of networks and services is increasing very quickly. Starting from its VoIP, NGN, and IMS to today's IP services landscape, which includes fixed and mobile high-definition (HD) voice, HD video calling, unified communications (UC), video conferencing, and telepresence, cooperation, instant messaging (IM), and the rich communication suite (RCS). Convergence is one of the most significant current trends in the ICT sector. It has changed the way services are delivered and obscured the distinction between fixed and mobile services. The transition to Next-Generation Networks (NGN) is the most important next phase in the ICT sector's convergence-driven evolution. In the realms of NGN, VoIP, and IMS, there is no PSTN equivalent; instead, there are \"IP islands \" that locate the total value of an IP service. The next basic step is to expand the arrive of those services across a totally interconnected cross-network premise in order to maximize their overall esteem among their target audiences. The liberalization of infrastructure services depends on managing the interconnection interface between the competitive and regulated sectors. These paper outlines regulation issues raised by IP-based interconnection and examine the current practices and procedural ways that being developed to address these concerns.","PeriodicalId":137077,"journal":{"name":"FES Journal of Engineering Sciences","volume":"261 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121812443","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

Phase-Field Modeling of Damage and Fracture in Laminated Unidirectional Fiber Reinforced Polymers 单向纤维增强层合聚合物损伤与断裂的相场模拟

FES Journal of Engineering Sciences Pub Date : 2021-02-22 DOI: 10.52981/FJES.V9I2.687

A. Dean, Pavan Kumar, Ammar Babiker, M. Brod, S. A. M. Ahmed, J. Reinoso, E. Mahdi

{"title":"Phase-Field Modeling of Damage and Fracture in Laminated Unidirectional Fiber Reinforced Polymers","authors":"A. Dean, Pavan Kumar, Ammar Babiker, M. Brod, S. A. M. Ahmed, J. Reinoso, E. Mahdi","doi":"10.52981/FJES.V9I2.687","DOIUrl":"https://doi.org/10.52981/FJES.V9I2.687","url":null,"abstract":"The damage and fracture behavior of Fiber Reinforced Polymers (FRPs) is quite complex and is different than the failure behavior of the traditionally employed metals. There are various types of failure mechanisms that can develop during the service life of composite structures. Each of these mechanisms can initiate and propagate independently. However, in practice, they act synergistically and appear simultaneously. The difficulties that engineers face to understand and predict how these different failure mechanisms result in a structural failure enforce them to use high design safety factors and also increases the number of certification tests needed. Considering that the experimental investigations of composites can be limited, very expensive, and time-consuming, in this contribution the newly developed multi Phase-Field (PF) fracture model [1] is employed to numerically study the failure in different Unidirectional Fiber Reinforced Polymers (UFRPs) laminates, namely, fracture in single-edge notched laminated specimens, matrix cracking in cross-ply laminates, and delamination migration in multi-layered UFRPs. The formulation of the PF model incorporates two independent PF variables and length scales to differentiate between fiber and inter-fiber (matrix-dominated) failure mechanisms. The physically motivated failure criterion of Puck is integrated into the model to control the activation and evolution of the PF parameters. The corresponding governing equations in terms of variational formulation is implemented into the Finite Element (FE) code ABAQUS utilizing the user-defined subroutines UMAT and UEL. ","PeriodicalId":137077,"journal":{"name":"FES Journal of Engineering Sciences","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130406702","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

High Impedance Fault Identification in TCSC-Compensated Power Transmission Lines tcsc补偿输电线路的高阻抗故障识别

FES Journal of Engineering Sciences Pub Date : 2021-01-13 DOI: 10.1986/FJES.V10I1.556

M. H. Musa

{"title":"High Impedance Fault Identification in TCSC-Compensated Power Transmission Lines","authors":"M. H. Musa","doi":"10.1986/FJES.V10I1.556","DOIUrl":"https://doi.org/10.1986/FJES.V10I1.556","url":null,"abstract":"The conventional distance relaying scheme performs poorly under the presence of Thyristors-controlled series capacitors “TCSC”, and during the high impedance fault “HIF”. TCSC provide a variable impedance during an internal/external fault and HIF is undetectable by the conventional overcurrent relaying due to low-current amplitude with non-linear behavior. Therefore, this paper presents a new Method for identifying the high impedance fault in TCSC-compensated transmission line. It is use the square error ration of the current signals during the fault period and current signals during the safe operating period for extracting the fault. The cumulative sum is being used for enlarging the fault features and then output index is obtained in order to perform the high impedance fault. The proposed method has been tested under different fault circumstances such as multiple fault locations, and multiple fault inception time. Moreover, fault happened nearby the terminal, power flow change, and faults in the presence of noise are also being considered. The test results have shown that the proposed method is good in term of time response, and then it is more appropriate for high impedance fault in TCSC-compensated power line.","PeriodicalId":137077,"journal":{"name":"FES Journal of Engineering Sciences","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127139837","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

تقييم معايير تحكيم مشاريع التخرج لطلبة العمارة، في قسم العمارة جامعة ام درمان الاسلامية- (أ) 评估乌姆杜尔曼伊斯兰大学建筑系建筑学生毕业项目的标准- a

FES Journal of Engineering Sciences Pub Date : 2019-10-06 DOI: 10.52981/fjes.v8i2.105

Ibrahim Siddig Mohamed

{"title":"تقييم معايير تحكيم مشاريع التخرج لطلبة العمارة، في قسم العمارة جامعة ام درمان الاسلامية- (أ)","authors":"Ibrahim Siddig Mohamed","doi":"10.52981/fjes.v8i2.105","DOIUrl":"https://doi.org/10.52981/fjes.v8i2.105","url":null,"abstract":"يعتبر تحكيم مشاريع التخرج لطلبة العمارة موضوع هام جدا، لذلك تهدف الورقة الى تقييم معايير تحكيم مشاريع التخرج لطلبة العمارة في قسم العمارة جامعة ام درمان الإسلامية بغرض معرفة الأسباب التي أدت الى الاختلاف والتباين الكبير في درجات التقييم للمشروع الواحد بين الاساتذة، لتحقيق هدف البحث تم اتباع منهجية مقسمة الى ثلاثة مراحل، المرحلة الأولى تم فيها استكشاف مكامن الخلل واستنتاج نقاط الضعف وذلك عبر مقارنة معايير تحكيم مشاريع التخرج لطلبة العمارة التي يهتم بها أعضاء اللجنة التحكيمية في المجتمعات الاكاديمية مع معايير تحكيم مشاريع التخرج لطلبة العمارة في جامعة ام درمان الإسلامية، ثانيا تحكيم مسودة نقاط الضعف عبر استبيان شامل لعدد 50 عينة من المختصين وتم تحليله، المرحلة الثالثة مقارنة المسودة لنقاط الضعف المستنتجة مع نقاط الضعف الناتج من تحليل الاستبيان بغرض معرفة المشاكل ونقاط الضعف التي أدت الى الاختلاف والتباين واهم هذه النقاط تتمثل في عدم مقدرة وكفاءة المعايير لتقييم مشاريع التخرج لطلبة العمارة بشكل عادل نسبة لعدم وجود تفاصيل كافية في كل معيار، وافتقارها الى المرونة الكافية في الاوزان لتقييم مشاريع التخرج. ","PeriodicalId":137077,"journal":{"name":"FES Journal of Engineering Sciences","volume":"125 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116575342","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