270 research outputs found

    Microstructural finite strain analysis of the Hafafit granitoids domes South Central Eastern desert of Egypt

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    The Wadi Hafafit Culmination (WHC) can be subdivided into two main units which are separated by Nugrus thrust shear zone. The WHC domes are occupies the southern part of the Central Eastern Desert of Egypt and is cored by five separated gneissic granitoids ranging in composition from tonalite to granodiorite having compositions consistent with hydrous partial melting of a mafic source suggesting subduction-related magmatism. The leucogranites along thrust zones is related to the late phase of metamorphism of Hafafit rocks. The five main domes of the WHC have been labeled A dome occupies the northern part of WHC, B and C domes occupies the central eastern part of WHC, D dome occupies the central western part of WHC and E dome occupies the southern part of WHC. The fourth domes A, B, C and E are affected by more than one deformation event but D dome is affected by one deformation event. The domes not uniform throughout the WHC according radial pattern of stretching lineation but these domes of WHC were subjected and affected by late-orogenic extension that was controlled by the Najd transform faults and that resulted in exhumation of the WHC domes are oriented NW-SE parallel to the trend of the left-lateral shear zones of Najd fault system

    Adaptive Coping During Protracted Political Conflict, War and Military Blockade in Gaza

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    Identifying culturally-relevant concepts and coping mechanisms can help protect civilian wellbeing. This study explores how seven professional Palestinian university graduates in the Gaza Strip (occupied Palestinian territories) cope with war, military occupation, military blockade and the challenges of living in a conflict-affected area. Participants were interviewed to determine whether culturally specific modes of coping were used. Thematic analysis was applied. The use of resistance and more specifically, sumud , being steadfast and persevering, were identified alongside the motivation to persevere and other adaptive responses to living conditions. Coping strategies identified in this study include adapting, problem-solving, accepting reality, exercising patience, utilising social support, and faith in God (iman) and religion. The implications of this study and the relevance of the findings to mental health and disaster relief are considered

    The Impact of Restrictive Versus Conservative Intraoperative Fluid Strategies upon the Renal Outcome in Colorectal Surgeries. A Randomized Controlled Trial

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    Background: intraoperative fluid handling has a lot of concerns upon the postoperative organ function. One of the most sensitive organs which could be affected is the kidney. Objectives: We conducted this trial to address the impact of restrictive vs. conservative fluid approaches on postoperative renal complications, hemodynamics and hospital stay. Patients and methods: Prospective, randomized, double-blind placebo-controlled trial at Assiut University Hospitals. The study included 60 adult patients with American Society of Anesthesiologists (ASA) grade II-III undergoing elective colorectal surgery with an expected operative duration of at least two hours. Grouping was based upon the intraoperative fluid management Group (R): 6 mL/kg/h. of lactated ringer (LR), Group (C): 12 mL/kg/h. of LR. The preoperative serum Neutrophil gelatinase-associated lipocalin (NGAL) level (basal value) then by the 2nd and 24th postoperative hours, KDIGO (Kidney Disease: Improving Global Outcomes), serum urea and creatinine were documented by the end of 1st and 2nd postoperative days. Intraoperative hypovolemia events were noted as well. Results: serum NGAL has increased >149 ng/mlin three patients within group C, and two patients within group R; however, the difference was statistically insignificant p= 0.5. KDIGO showed significant difference between the two groups, with higher number of patients in the group R with p= 0.043. Serum urea and creatinine, intraoperative hypovolemic episodes showed insignificant differences between groups. Conclusion: no evident difference between restrictive and conservative intraoperative fluid strategies was noticed upon the early postoperative serum NGAL and other systems complications in patients undergoing major colorectal surgeries

    Efficiency Evaluation of a wastewater Treatment Plant by Activated Sludge

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    Abstract: Performance of El-Agamyeen Plant for wastewater treatment (WWTP) by activated sludge was studied over a period of 20 weeks. Results showed that chemical oxygen demand; COD, biochemical oxygen demand; BOD, total suspended solids; TSS and ammonia decreased through stages of treatment process. The percentage removal of these parameters during studied period ranged 86-95, 91-96, 90-94 and 71-85 % respectively. Dissolved oxygen; DO in aeration tank was not less than 1.2 mg/L during study. Of microfauna, amoebae and flagellates appeared at low DO and high organic load, dominancy of crawling and stalked ciliates affected efficiency of treatment. Rotifers count ranged from 1.3x10 3 to 9x10 4 indicating good sludge quality.High toxicity could be obtained with the inlet wastewater and decreased with mixed liquor; the outlet water has been shown the least average toxic effects (<10% mortality) on the test organism. The results indicated that wastewater treatment in this Plant during the study period reduced pollution significantly and effluent water can be left for discharge into water bodies

    Social suffering and the psychological impact of structural violence and economic oppression in an ongoing conflict setting: The Gaza Strip

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    Structural violence and economic oppression (e.g. control over resources, politically engineered poverty and unemployment) are common features of warfare, yet there is a lack of research exploring the impact this has on civilian wellbeing in conflict‐affected areas. This study, embedded within a human rights and community liberation psychology framework, aims to address this need by studying young Palestinian university graduates living under military blockade and occupation in the Gaza Strip. Semi‐structured interviews were conducted. Thematic analysis indicated that economic and political domains adversely affected multiple aspects of civilian life and wellbeing. The findings revealed the deleterious effects of structural violence and economic oppression which created: human insecurity; poor psychological wellbeing and quality of life; existential, psychological and social suffering; humiliation; injuries to dignity; multiple losses; and led to life being experienced as ‘on hold’. Local expressions and idioms to express distress were identified. The findings contributed to unique insights regarding how continual, systemic, and structural oppression can be potentially more psychologically detrimental than specific incidents of conflict and violence. The implications and the relevance of the findings to mental health and disaster relief are considered. Interventions providing human security and economic security should be prioritised

    Time-Fractional Optimal Control of Initial Value Problems on Time Scales

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    We investigate Optimal Control Problems (OCP) for fractional systems involving fractional-time derivatives on time scales. The fractional-time derivatives and integrals are considered, on time scales, in the Riemann--Liouville sense. By using the Banach fixed point theorem, sufficient conditions for existence and uniqueness of solution to initial value problems described by fractional order differential equations on time scales are known. Here we consider a fractional OCP with a performance index given as a delta-integral function of both state and control variables, with time evolving on an arbitrarily given time scale. Interpreting the Euler--Lagrange first order optimality condition with an adjoint problem, defined by means of right Riemann--Liouville fractional delta derivatives, we obtain an optimality system for the considered fractional OCP. For that, we first prove new fractional integration by parts formulas on time scales.Comment: This is a preprint of a paper accepted for publication as a book chapter with Springer International Publishing AG. Submitted 23/Jan/2019; revised 27-March-2019; accepted 12-April-2019. arXiv admin note: substantial text overlap with arXiv:1508.0075
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