282 research outputs found
Drought and famine relationships in Sudan: policy implications
No full textSudan is one of the few countries where famine still persists. Why? What are the determinants of famine in Sudan? What is the role of drought, especially in the context of economic policy failure and war? Who is affected by famine? What needs to be done to mitigate and prevent famine? These are some of the questions addressed in Drought and Famine Relationships in Sudan: Policy Implications, Research Report 88, by Tesfaye Teklu, Joachim von Braun, and Elsayed Zaki. The research is particularly concerned with quantitatively tracing the drought-production-consumption-nutrition linkages under famine conditions at the household level in order to identify effective means of alleviating and preventing famine.... while famine is often strongly linked to drought, this research finds that even under the severe economic constraints of Sudan, suitable government planning and action can forestall that linkage.Famines Sudan., Droughts Sudan., Food relief Government policy Sudan., Drought relief Government policy Sudan.,
Correction: Guidelines for the prevention, detection and management of the renal complications of COVID-19 in Africa
No full textThe authors of the article ‘Guidelines for the prevention, detection and management of the renal complications of COVID-19 in Africa’ [1] wish to acknowledge the contribution of Professor Hussein El Fishawy. Our guidelines drew on various sources, including the Egyptian Ministry of Health guidelines, portions of which were adapted and reproduced with permission from the Egyptian Ministry of Health. Two of the authors of those guidelines, Professors Elsayed and Zaki, are also coauthors of our paper. Professor El Fishawy was the third author of the Egyptian guidelines and we would like to acknowledge his contribution to our review through this source, especially with respect to the treatment algorithms for patients with kidney transplants and those with acute kidney injury. Reference1. Elsayed HM, Wadee S, Zaki MS, Were AJO, Ashuntantang GE, Bamgboye EL, et al. Guidelines for the prevention, detection and management of the renal complications of COVID-19 in Africa. Afr J Nephrol. 2020; 23(1):109-126
Active distribution network modeling for enhancing sustainable power system performance; a case study in Egypt
No full textThe remarkable growth of distributed generation (DG) penetration inside electrical power systems turns the familiar passive distribution networks (PDNs) into active distribution networks (ADNs). Based on the backward/forward sweep method (BFS), a new power-flow algorithm was developed in this paper. The algorithm is flexible to handle the bidirectional flow of power that characterizes the modern ADNs. Models of the commonly used distribution network components were integrated with the developed algorithm to form a comprehensive tool. This tool is valid for modeling either balanced or unbalanced ADNs with an unlimited number of nodes or laterals. The integrated models involve modeling of distribution lines, losses inside distribution transformers, automatic voltage regulators (AVRs), DG units, shunt capacitor banks (SCBs) and different load models. To verify its validity, the presented algorithm was first applied to the unbalanced IEEE 37-node standard feeder in both passive and active states. Moreover, the algorithm was then applied to a balanced 22 kV real distribution network as a case study. The selected network is located in a remote area in the western desert of Upper Egypt, far away from the Egyptian unified national grid. Accordingly, the paper examines the current and future situation of the Egyptian electricity market. Comparison studies between the performance of the proposed ADNs and the classical PDNs are discussed. Simulation results are presented to demonstrate the effectiveness of the proposed ADNs in preserving the network assets, improving the system performance and minimizing the power losses
Policy implications
No full textSudan is one of the few countries where famine still persists. Why? What are the determinants of famine in Sudan? What is the role of drought, especially in the context of economic policy failure and war? Who is affected by famine? What needs to be done to mitigate and prevent famine? These are some of the questions addressed in Drought and Famine Relationships in Sudan: Policy Implications, Research Report 88, by Tesfaye Teklu, Joachim von Braun, and Elsayed Zaki. The research is particularly concerned with quantitatively tracing the drought-production-consumption-nutrition linkages under famine conditions at the household level in order to identify effective means of alleviating and preventing famine.... while famine is often strongly linked to drought, this research finds that even under the severe economic constraints of Sudan, suitable government planning and action can forestall that linkage.PRIFPRI1; Food Security, Hunger, Famine, and Crise
Transformers improvement and environment conservation by using synthetic esters in Egypt
No full textDistribution transformer (DT) is a crucial component in power systems as it exchanges energies between different voltage levels or between utility grid and DC microgrids. Neverthelessthe operation of an oil-immersed DT is limited by the thermal and electrical capabilities of the internal insulating liquid. This paper aims to raise the efficiency of distribution transformers and preserve the environment by using a biodegradable insulating liquid instead of the conventional mineral insulating oil (MIO). This work examines the Egyptian case, where a real distribution network located in middle Egypt is selected as a pilot project. Study and analysis of the status que of the insulation system inside DTs are done with the aid of fault-tree analysis. The deficiency of the insulation system is confirmed by conducting an electronic survey of 100 expert participants. The most appropriate solution among three different alternatives is confirmed using the weighting and ranking method. The best choice suitable for the selected area is the substitution of MIO by synthetic ester (SE). The technical and environmental advantages achieved by the presented solution are discussed. The feasibility studies have proven that the solution is positively acceptable in all aspectsAn execution plan is established for the application of proposed solution on the selected Egyptian distribution network
Drought and famine relationships in Sudan: Policy implications
No full textSudan is one of the few countries where famine still persists. Why? What are the determinants of famine in Sudan? What is the role of drought, especially in the context of economic policy failure and war? Who is affected by famine? What needs to be done to mitigate and prevent famine? These are some of the questions addressed in Drought and Famine Relationships in Sudan: Policy Implications, Research Report 88, by Tesfaye Teklu, Joachim von Braun, and Elsayed Zaki. The research is particularly concerned with quantitatively tracing the drought-production-consumption-nutrition linkages under famine conditions at the household level in order to identify effective means of alleviating and preventing famine.... while famine is often strongly linked to drought, this research finds that even under the severe economic constraints of Sudan, suitable government planning and action can forestall that linkage
Organic Polymers
No full textThis book, Organic Polymers, covers aspects that are of immediate concern to a new entrant to the field of polymers. Taken as a whole, these eight chapters aim to help the readers easily assimilate other specialized and exhaustive treatises on the subject. Topics dealing with the chemistry and technology of polymers are presented in a careful and logical manner so as to provide an easy and enjoyable read. Several examples and analogies are included so to make the main concepts easy to follow and tables and figures are included so that the book can serve, to a limited extent, as a hand book dealing with polysaccharides with different parameters. This book is meant for students studying polysaccharides and those working on graft copolymers and other allied polymer industries but without a formal educational background in organic polymers
Paraffin
No full textThis book, Paraffin - Thermal Energy Storage Applications, includes 6 chapters that focus on thermal energy storage. It examines the preparation of paraffin via encapsulation to develop a nonconventional energy storage material
Paraffin
No full textThis book, Paraffin - Thermal Energy Storage Applications, includes 6 chapters that focus on thermal energy storage. It examines the preparation of paraffin via encapsulation to develop a nonconventional energy storage material
Représentations littéraires du sacré dans le roman maghrébin de langue française
No full textThis interdisciplinary study explores how Driss Chraïbi’s L’Homme du Livre (1995), Assia Djebar’s Loin de Médine (1991), and Anissa Boumediène’s La fin d’un monde (1991) present accounts of particular historical moments in early Islam. This study explores the role of the imagination as well as freedom of invention when reconstructing historical events. It engages the novels through a study of the interplay between the literary text and the sources and traditions that impact and shape the text narrative. Gaining direct access to the original sources in Arabic serves to analyze how religious and early historical materials are considered in and reflected by the fictional texts. Because the sources tend to differ in both content and approach, this study examines their preoccupations in order to determine the criteria of selection applied by each novelist.Ph.D.Includes bibliographical referencesIncludes vitaby Hanan Elsaye
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