290 research outputs found
LEADERSHIP QUALITIES ON CRISIS MANAGEMENT STRATEGY IN AL AIN CIVIL DEFENSE CENTER, AL AIN, ABU DHABI.
No full textThe problem of corrugator sequencing and its impact on packaging processes
Get PDFThis report presents the result of an initial step towards an interdisciplinary research partnership between the involved departments at Aleppo and Lund University. The initiator and main author, Dr. Ayman Hamadeh, visited Division of Packaging Logistics during the summer 2008. During that time the authors identified corrugator sequencing as a common research field and embarked on a joint explorative study aiming to identify future research projects within the shared problem area
Thematic Study of “Ayman al-ʿAtūm”’s Prison Novels
No full textThe novel is a prose genre whose origins are thought to be based on epics and whose first examples emerged in Europe. The development of the novel genre in Arab geography has experienced some difficulties. Some types of novels with unique styles were prevented from being distributed and published by various censors. The genre that calls itself prison literature deals with the life stories of prisoners in prison, their torture, and the hardships they experience. The general themes of these novels are freedom, exhaustion, despair, and resistance. Although works have been written in this genre in the West, this genre also has a special place in Arabic literature. Authors such as Abdurrahman Munif, Majid Suleiman, Mustafa Khalifa and Ayman al-ʿAtūm stand out in Arabic literature. Ayman al-ʿAtūm, whose novels feature an Islamist aspect, is one of the most important figures in modern Arabic literature. In both his novels Yā Sāhibeyi’s-Sijn and Yāsmeūne Hasīsehā, he experienced and fictionalized the punishment of rebelling against authority or holding different views in societies ruled by authoritarian regimes and in which democracy exists only in words. In addition to being an engineer, the author is an academic and a man of letters
Job stress and satisfaction among academic staffs in public universities: An empirical study in the United Arab Emirates (UAE)
Get PDFThe purpose of this study is to measure the role of job stress among the academic staff of the public universities of UAE. A survey was conducted among 350 academic staffs of the public universities across UAE, concerning the trends of job stress and satisfaction and a possible relationship between these two variables. Primary data analysis reveal that the public universities showed different directions for varying forms of job stress. Moreover, five types of stressors were found to be significant for the academic staff at the universities and when they were tested on job stress, the results revealed the significant impact on job stress. More specifically, pay, and growth stressors as well as work-related stressors were found to negatively influence job stress for the academic staff. Future research of time series analysis can be conducted to understand the trends of stress under different situations over time for academic staff
Optimal scheduling and resource utilization for repetitive construction projects
Get PDFRepetitive construction projects require construction crews to repeat their work in a number of locations in the same project, moving from one location to the next. Scheduling this type of projects often requires maximizing work continuity for these crews while reducing the project duration and the use of overtime. The main goal of this study is to present the development of novel models for optimizing the scheduling of repetitive construction projects that is capable of accomplishing these planning objectives. To achieve this goal, the research objectives of this study are to develop (1) a novel heuristic and computationally-efficient scheduling model for repetitive projects that minimizes both the project duration and crew work interruptions; (2) an innovative optimization model for scheduling repetitive construction projects that is capable of searching for and identifying optimal schedules that minimize project duration, work interruptions, and interruption costs; and (3) a novel multi-objective optimization model for repetitive construction projects that generates optimal tradeoffs among project duration, work interruptions, and overtime use.
The performance of these developed models was analyzed and verified by comparing their results to those generated by existing models. The results of this analysis illustrates the novel and unique capabilities of the developed models in generating optimal tradeoffs among project duration, work interruptions, and overtime use. These novel capabilities are expected to provide much needed support to planners of repetitive construction projects and enable them to (i) minimize project duration, (ii) maximize crew work continuity, (iii) minimize interruption costs, (iv) minimize the use of overtime hours; and (v) reduce the required time and effort to perform the scheduling computations for large-scale repetitive construction projects by using a computationally efficient heuristic scheduling model.Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2020-08-01The student, Ayman Altuwaim, accepted the attached license on 2018-07-04 at 11:06.The student, Ayman Altuwaim, submitted this Dissertation for approval on 2018-07-04 at 11:09.This Dissertation was approved for publication on 2018-07-05 at 16:07.DSpace SAF Submission Ingestion Package generated from Vireo submission #12628 on 2018-09-27 at 11:33:14Made available in DSpace on 2018-09-27T16:45:31Z (GMT). No. of bitstreams: 3
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Previous issue date: 2018-07-05Embargo set by: Seth Robbins for item 107857
Lift date: 2020-09-27T16:45:39Z
Reason: Author requested closed access (OA after 2yrs) in Vireo ETD systemEmbargo set by: Seth Robbins for item 107857
Lift date: 2020-09-27T16:47:41Z
Reason: Author requested closed access (OA after 2yrs) in Vireo ETD systemLimited Restriction Lifted for Item 107857 on 2020-09-28T09:15:24Z
Modelling the behaviour of unsaturated non-active clays in saline environment
Get PDFThe chemical composition of pore fluid and matric suction rule the mechanical behaviour of soils. In case of clays, their fabric changes in line with those variables. Since both the increase in matric suction and salinity cause a transition from an open to a close microstructure of low and medium activity clayey materials, a unique framework could tackle problems where salinity and saturation changes are expected. This paper presents a simple elasto-plastic model capable of reproducing the behaviour of unsaturated clayey soils in saline environments. Changes in the pore fluid composition are addressed through the use of osmotic suction as a variable. The proposed model extends the Barcelona Basic Model for partially saturated soils to consider the effect of osmotic suction. The model, implemented in the Thebes code, is calibrated for Boom Clay. The reproduced tests include mechanical loading at different matric and osmotic suctions in oedometric conditions, as well as more complex chemo-mechanical stress paths. Despite the simplicity of the formulation, the agreement between the experimental results and the simulations is encouraging. It seems that the modelling approach addresses the most important features of partially saturated soils with saline pore fluid which are slightly or moderately expansive
Modeling and Testing of Reinforced Concrete or Composite Structures Using Advanced New Materials
No full textThis Reprint focuses on the emerging concepts that allow for the design of reinforced concrete, including new or improved concrete material, as well as on the characterization of the properties of typical reinforced concrete structures. The author of this Reprint is an Assistant Professor at Texas A&M University-Commerce, USA
Morphometric characteristics of the pelvic limb musculature of Labrador Retrievers with and without cranial cruciate ligament deficiency
No full textObjective: To identify morphometric characteristics of the pelvic limb musculature associated with the development of cranial cruciate ligament (CCL) deficiency in Labrador Retrievers.
Study Design: Cross-sectional clinical study.
Animals:
Pure-bred female (n=18) and male (n=12) Labrador Retrievers with (n=16) and without (n=14) CCL deficiency.
Methods: Muscle conformation of pelvic limbs was evaluated by physical examination, radiography (widths of quadriceps, hamstring, and gastrocnemius were expressed relative to tibial length and to each other), and dual-energy X-ray absorptiometry (DEXA, lean contents of quadriceps, hamstring, and gastrocnemius were expressed relative to tibial length and to each other). Pelvic limbs of dogs without CCL deficiency were classified as normal (n=28 limbs), whereas those with CCL deficiency were considered diseased (n=18 limbs) or sound contralateral to CCL deficiency (n=10 limbs). Variables were compared between groups using mixed models analysis of variance, with P<.05 considered significant.
Results: The ratios of quadriceps width to tibial length (P=.008), hamstring width (P=.013), and gastrocnemius width (P=.005) on lateral radiographs were lower in diseased limbs than controls. The mass of hamstring muscles in CCL deficient limbs was similar to that of normal limbs. The ratio of the lean content of gastrocnemius to hamstring muscles was greater in diseased (P=.007) and sound contralateral (P=.013) limbs than in normal limbs.
Conclusions: Atrophy associated with CCL deficiency may predominantly affect the quadriceps muscle. Dominance of the gastrocnemius muscle over active restraints to the cranial tibial thrust may be associated with predisposition to CCL deficiency in Labrador Retrievers.
Clinical Relevance: If confirmed, this dynamic imbalance between muscle groups of the rear limbs could serve as a basis for screening programs and preventive rehabilitation
Carvedilol, a beta adrenoceptor blocker with antioxidative potential, attenuates cisplatin-induced nephrotoxicity in rats
No full textCorresponding Author: Ayman M. Gamal el-Din, Department of Pharmacology, College of Pharmacy, King Saud
University, P.O. Box 2457, Riyadh 11451, Kingdom of Saudi Arabia.
E-mail: [email protected] the present study, kidney damage induced by cisplatin treatment (7mg kg-1day-1) was characterized by significant increases in kidney weight as a percentage of total body weight, alterations in renal function as
serum creatinine and serum BUN levels. On the other hand, there was decrease in serum albumin and calcium levels compared with untreated control animals. In addition, cisplatin induced a significant renal oxidative stress demonstrated by elevated renal MDA, reduction of GSH and reduced activities of renal catalase and glutathione
peroxidase (GPx) compared with untreated control animals. Carvedilol-induced attenuation of cisplatin nephrotoxicity (5 mg kg-1day-1) 5 days prior to and 5 days post cisplatin was clearly manifested by the
improvement of renal dysfunction. Carvedilol administration also reduced the increased renal MDA level and restored the depleted renal GSH and antioxidant enzymes (catalase and GPx). The renoprotective effect of
carvedilolmay be attributed to its radical scavenging and antioxidant activities. In conclusion, these findings of the present study strongly suggest the role of oxidative stress in the pathophysiology of cisplatin-induced nephrotoxicity and that carvedilol can be used for the renoprotection of cisplatin-induced nephrotoxicity
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