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This study aims to assess the financial performance in the areas of liquidity, operational activity, debt, of the non-oil industries companies listed on the Libyan stock market (LSM) for the years from 1999 to 2008. Many previous studies... more
This study aims to assess the financial performance in the areas of liquidity, operational activity, debt, of the non-oil industries companies listed on the Libyan stock market (LSM) for the years from 1999 to 2008. Many previous studies examined the subject of financial performance in the various economic sectors, such as industrial, service, commercial, banking, and tourism from developed and developing countries. Researchers have studied in these subjects on evaluating the financial performance such as Medhat Tarawneh, 2006, Liargovas and Skandalis, 2008, Amalendu Bhunia (2010), Almajali, et al, 2012, and many more. The sample of this study consists of eight companies which were selected based on the criterion of size of the capital. This study is based on the secondary data obtained from the balance sheets and profit and loss accounts. This study used the financial ratio analysis to measure the level of liquidity and operational activity, leverage and profitability, while the st...
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Laboratory turnaround time is considered one of the most important indicators of work efficiency in hospitals, physicians always need timely results to take effective clinical decisions especially in the emergency department where these... more
Laboratory turnaround time is considered one of the most important indicators of work efficiency in hospitals, physicians always need timely results to take effective clinical decisions especially in the emergency department where these results can guide physicians whether to admit patients to the hospital, discharge them home or do further investigations. A retrospective data analysis study was performed to identify the effects of ER and Lab staff training on new routines for sample collection and transportation on the pre-analytical phase of turnaround time. Renal profile tests requested by the ER and performed in 2013 has been selected as a sample, and data about 7,519 tests were retrieved and analyzed to compare turnaround time intervals before and after implementing new routines. Results showed significant time reduction on "Request to Sample Collection" and "Collection to In Lab Delivery" time intervals with less significant improvement on the analytical ph...
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Page 1. IEEE TRANSACTIONS ON POWER APPARATUS AND SYSTEMS, VOL. PAS-87, NO. 7, JULY 1968 TABLE V Pinnacle Percent Operating Reactor, of Higher Breaker Operation Mvar Open End Shots at Pinnacle 230 energize 70 Cholla 345 100 Cholla 345 ...
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Amiodarone- (AM-) induced pulmonary toxicity (AIPT) is still a matter of research and is poorly understood. In attempting to resolve this issue, we treated Sprague-Dawley rats with AM doses of 80 mg/kg/day/i.p. for one, two, three, and... more
Amiodarone- (AM-) induced pulmonary toxicity (AIPT) is still a matter of research and is poorly understood. In attempting to resolve this issue, we treated Sprague-Dawley rats with AM doses of 80 mg/kg/day/i.p. for one, two, three, and four weeks. The rats were weighed at days 7, 14, 21, and 28 and bronchoalveolar lavages (BAL) were obtained to determine total leukocyte count (TLC). For each group, lung weighing, histopathology, and homogenization were performed. Fresh homogenates were used for determination of ATP content, lipid peroxides, GSH, catalase, SOD, GPx, GR activities, NO, and hydroxyproline levels. The results showed a significant decrease in body weight and GSH depletion together with an increase in both lung weight and lung/body weight coefficient in the first week. Considerable increases in lung hydroxyproline level with some histopathological alterations were apparent. Treatment for two weeks produced a significant increase in BAL fluid, TLC, GR activity, and NO leve...
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Purpose – The purpose of this paper is to propose a quantitative model for risk-based maintenance and remaining life assessment for gas turbines. Design/methodology/approach – The proposed model uses historical failure and repair data... more
Purpose – The purpose of this paper is to propose a quantitative model for risk-based maintenance and remaining life assessment for gas turbines. Design/methodology/approach – The proposed model uses historical failure and repair data from the operation of gas turbines. The time to failure of gas turbines is modeled using Weibull distribution. Findings – The total risk is estimated considering replacement cost, repair cost, operation cost, risk of failure and turbine remaining value after a specified period of time. Originality/value – The model is an effective tool to make optimal decisions regarding maintenance strategy (repair or replacement) and to assess the remaining life based on a comparison of the total risk. The literature review focusses on developing different models to make risk-based decisions regarding the selection of a maintenance strategy and maintenance interval, however, literature is silent regarding risk-based assessment of the equipment remaining life, which i...
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... world, cannot be achieved without a good appreciation of the factors affecting the purchase ... in the elaboration of a model that can identify key factors influencing purchasing on the ... characteristic [Ill, should hence facilitate... more
... world, cannot be achieved without a good appreciation of the factors affecting the purchase ... in the elaboration of a model that can identify key factors influencing purchasing on the ... characteristic [Ill, should hence facilitate the formation of a favorable attitude towards an innovative ...
Research Interests: Information Systems, Psychology, Computer Science, Human Factors, Consumer Behavior, and 14 moreTheory of Planned Behavior, Surveys, Hardware, Online Shopping, Consumer Electronics, Theory and Practice, Survey data, Longitudinal Study, Control Management, Consumer Behaviour, Behavioral Control, Internet, E Commerce, and Electronic Commerce
... MOHAMED KHALIFA, Member IEEE, RUSHDY RADWAN, ASSAAD ZEITOUN and AFAF ABDEL-FATTAH Electrical Engineering Dept., University of Cairo, UAR ... The other method of calculation' 5, was to represent the corona loss by a line-to-ground... more
... MOHAMED KHALIFA, Member IEEE, RUSHDY RADWAN, ASSAAD ZEITOUN and AFAF ABDEL-FATTAH Electrical Engineering Dept., University of Cairo, UAR ... The other method of calculation' 5, was to represent the corona loss by a line-to-ground conductance, the magnitude ...
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Research Interests:
Bartter syndrome is an autosomal recessive disease manifested by a defect in chloride transport in the thick loop of Henle, with different genetic origins and molecular pathophysiology. Children with Bartter syndrome generally present in... more
Bartter syndrome is an autosomal recessive disease manifested by a defect in chloride transport in the thick loop of Henle, with different genetic origins and molecular pathophysiology. Children with Bartter syndrome generally present in early infancy with persistent polyuria and associated dehydration, electrolyte imbalance, and failure to thrive. Although early diagnosis and appropriate treatment of Bartter syndrome may improve the outcome, some children will progress to renal failure. We report a case of an 8-week-old infant who was admitted for electrolyte imbalance and failure to thrive. Laboratory studies revealed hypochloremic metabolic alkalosis with severe hypokalemia. Health care providers should consider Bartter syndrome when excessive chloride losses appear to be renal in origin and the patient has normal blood pressure and high levels of serum renin and aldosterone. Treatments, including indomethacin, spironolactone, and aggressive fluid and electrolyte replacement, may...
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Research in human-computer interaction has resulted in the development of task-theoretic analytical models that allow interface designers to evaluate the interface design on paper before building a prototype. Despite the potential of such... more
Research in human-computer interaction has resulted in the development of task-theoretic analytical models that allow interface designers to evaluate the interface design on paper before building a prototype. Despite the potential of such models to reduce interface development costs and improve design quality, they are not widely used. We believe that the complexity of these models is the main impediment and propose a computer system to remove this obstacle. The proposed system enables interface designers to describe an interface design formally and then assess it in terms of usability dimensions such as ease of learning and ease of use. It facilitates and structures task analysis and spares designers the burden of learning the complex syntax of analytical models. This paper describes the proposed system and discusses an empirical study designed to evaluate it. The empirical results show that the proposed system improves the accuracy and speed of evaluation of interface designs and ...
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PurposeIntegrating the two‐system (reflective vs. impulsive) model and the “stimulus‐organism‐response” framework, the purpose of this paper is to construct and empirically test a model that examines online impulse buying as a phenomenon... more
PurposeIntegrating the two‐system (reflective vs. impulsive) model and the “stimulus‐organism‐response” framework, the purpose of this paper is to construct and empirically test a model that examines online impulse buying as a phenomenon triggered by system design factors.Design/methodology/approachA laboratory experimental design with a 2×2 full factorial design involving 151 undergraduate students was used to validate the effects of system design stimuli on online impulse buying. Interactivity and vividness, two design factors, were manipulated and a fictitious VCD movie store was created, with four storefronts representing each combination of treatments.FindingsA compelling and sociable virtual experience as conceptualized with telepresence and social presence has a significant effect on buying impulses over and above traditional marketing/product stimuli. Such virtual experience can be created through the usage of interactive and vivid website features. Furthermore, cognition po...
Research Interests: Psychology, Computer Science, Design, System Design, Online, and 8 moreInteractivity, System, Originality, Purchasing, Effects, Buying, Internet, and Impulse
The way knowledge is represented influences the effectiveness with which that knowledge can be shared and reconstructed. Of particular interest to this study is the hypertext knowledge representation. Based on the schema theory, we... more
The way knowledge is represented influences the effectiveness with which that knowledge can be shared and reconstructed. Of particular interest to this study is the hypertext knowledge representation. Based on the schema theory, we propose a model explaining the effect of the hypertext knowledge representation on the user's problem solving performance. The sophistication of the knowledge structure that the user can construct from the hypertext knowledge representation is proposed as an intervening variable mediating the effect of hypertext on the problem solving performance. According to our model, the hypertext representation of the "collective schemata" of a group of experts allows the user to acquire a more complex and better integrated knowledge structure that is more similar to the experts' than does a linear representation. The model further hypothesizes that the complexity, integration and degree of similarity of an individual's schemata to that of do...
Research Interests: Computer Science, Knowledge Representation, Schema Theory, Knowledge, Problem Solving, and 14 moreRepresentation, Hypertext, Acquisition, Field Experiment, Knowledge Acquisition, Knowledge Construction, Domain Knowledge, Knowledge Elicitation, Problem, Effects, Knowledge Representation and Reasoning, Expert knowledge, Knowledge Structure, and Solving
... For semantic network discussion representations, these clues take the form of network-based structure with links and cross-links, which represent ... There is ample empirical evidence demonstrating the effect of contextualization on... more
... For semantic network discussion representations, these clues take the form of network-based structure with links and cross-links, which represent ... There is ample empirical evidence demonstrating the effect of contextualization on increased knowledge acquisition [80]. ...
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The authors propose an automated tool that designers of user interfaces could use to formally describe interface designs and evaluate these designs in terms of ease of use and ease of learning. They also describe a prototype system that... more
The authors propose an automated tool that designers of user interfaces could use to formally describe interface designs and evaluate these designs in terms of ease of use and ease of learning. They also describe a prototype system that has been built to illustrate the proposed concept. The tool consists of an Interface Description and Evaluation System (IDES) that allows
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One of the key objectives of knowledge management is to transfer knowledge quickly and efficiently from experts to novices, who are different in terms of the structural properties of domain knowledge or knowledge structure. This study... more
One of the key objectives of knowledge management is to transfer knowledge quickly and efficiently from experts to novices, who are different in terms of the structural properties of domain knowledge or knowledge structure. This study applies experts' semantic networks to hypertext navigation design and examines the potential of the resulting design, i.e., semantic hypertext, in facilitating knowledge structure acquisition and problem solving. Moreover, we argue that the level of sophistication of the knowledge structure acquired by learners is an important mediator influencing the learning outcomes (in this case, problem solving). The research model was empirically tested with a situated experiment involving 80 business professionals. The results of the empirical study provided strong support for the effectiveness of semantic hypertext in transferring knowledge structure and reported a significant full mediating effect of knowledge structure sophistication. Both theoretical and...
Research Interests: Information Systems, Computer Science, Information Retrieval, Design, Knowledge Management, and 15 moreStructure, Content Analysis, Knowledge, Problem Solving, Hypertext, Library and Information Studies, Information Transfer, Semantic Network, Knowledge Acquisition, Empirical Research, Domain Knowledge, Problem, Empirical Method, Knowledge Structure, and Sophistication
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Research Interests:
Research Interests: Engineering, Computer Science, Software Maintenance, Software Testing, Software Development, and 14 moreNew Product Development, Prototyping, Programming, Software Quality, Statistical Significance, Software Process Improvement, Product Development, Predictive models, Product Quality, Construction Process, Development Process, Software Development Process, Waterfall Model, and Application Software
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Research Interests:
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Research Interests: Information Systems, Computer Science, Information Science, Information Technology, Management Information Systems, and 15 moreInformation Management, Health Information Systems, Case Studies, Management Science, Business Information Systems, Accounting Information Systems, Business and Management, Habit, Information Systems Management, Business Model, Information Management System, Information Systems Technology, Computer Information Systems, Geographic Information Systems, and Information System
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ABSTRACT We investigated how virtual community VC design, both technical and social decisions adopted by VC management teams, might affect the development of members’ identification with the VC. Adopting a comparison approach developed in... more
ABSTRACT We investigated how virtual community VC design, both technical and social decisions adopted by VC management teams, might affect the development of members’ identification with the VC. Adopting a comparison approach developed in studying formal organisational identification, we develop the research model explaining the effects of VC design on VC identification. A survey study involving 412 members from seven VCs revealed that identified VC design factors community presentation and community empowerment have significant impacts on identification by making the perceived VC identities attractive. We concluded with a discussion of the key managerial and research implications of our findings.
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ABSTRACT this paper is as follows. Following the introduction, we present the background and theory underlying the study. Next we present the research methodology, describing the experimental design, procedure and measurement. We then... more
ABSTRACT this paper is as follows. Following the introduction, we present the background and theory underlying the study. Next we present the research methodology, describing the experimental design, procedure and measurement. We then discuss the results and their implications. In conclusion, we summarize the contributions of this study and propose future research
1 ADEQUACY OF KNOWLEDGE MANAGEMENT STRUCTURES Mohamed Khalifa Rinky LamMatthew Lee iskhal@cityu.edu.hk isrinky@cityu.edu.hk ismatlee@cityu.edu.hk Tel: 852-2788-7491 Tel: 852-2788-7539 Tel: 852-2788-7348 Department of Information Systems ...