A Solution of Single Server and Multiserver General Queueing Systems Using a Linear Algebraic Approach

Performance evaluation of computer systems and communication networks is very important due to the essential need of finding such systems which can meet all the objectives, for which these resources are built, at an acceptable cost. Many methods h ave been applied to describe the performance of these resources and to find possible ways of improving performance. Each of these methods has its own characteristics and procedure in dealing with the performance concept. These procedure describe these systems such that a previously specified technique can be used to evaluate useful performance measurements which will help decision making. The queueing network model is the most widely used computer systems and communication networks description method. Traditional techniques used in solving the above method use unrelated mathematical techniques. The linear algebraic approach has been chosen as the mathematical approach in this thesis. This approach transforms the queuing theory problems from those of integral equations into those of algebraic equations over a finite dimensional vector space. The solutions obtained using this approach can now make use of the high-speed parallel processors since the components of these solutions are in matrixvector format. In this research, the linear algebraic approach is used to derive explicit solutions for single server and multi server general queueing systems

The determinants of internet financial disclosure: The perspective of Malaysian listed companies

This paper investigates whether Internet Financial Disclosure (IFD) can be explained by the elements of the company’s characteristics and dominant personalities in board committees.Ten variables have been tested using data collected from 194 Malaysian listed companies’ websites, namely, internationality, leverage, foreign shareholders, information technology (IT) experts, firm’s age, number of shareholders, listing status, dominant personalities in the audit committee, chairman of audit and nomination committees, and dominant personalities in the audit and nomination committees.It is found that IT experts, firm’s age, number of shareholders and listing status are significantly affected by the level of IFD. However dominant personalities in the audit and nomination committees are negatively related to the level of IFD in Malaysia.The study provides some evidence to support the signalling theory and the cost and benefit hypothesis in relation to Internet disclosure

Practices that organizations employ to enhance business intelligence agility

In today's rapidly changing business environment, organizations strive to be agile in order to accommodate changes and seize opportunities. Since organizations use information system as a tool to serve their needs, it is important for these systems also to be agile. One prominent type of such systems is business intelligence, which provides organizations with information to gain and retain competitive advantage. This thesis focuses on business intelligence agility, which is widely discussed in practice however not extensively covered in information systems literature. Therefore, this thesis seeks to identify the practices employed by organizations to enhance business intelligence agility. To find the answer to the research question this thesis first compiles a theoretical framework on business intelligence, information systems agility in general and business intelligence agility in specific using academic literature and market white papers. This compiled framework is comprised of four enabling factors 1) sensing business changes, 2) development approach, 3) IT governance, and 4) technical factors. This thesis conducts a qualitative research based on semi-structured interviews with business intelligence experts. Based on analysis of the empirical data this thesis identified a set of practices organized in terms of the enabling factors. The practices in sensing business changes are enabling business staff to sense changes and incorporating business staff feedback into data requirements. Regarding development approach, this thesis identifies the practices as applying an iterative development approach, building collaborative team of skilled members, enabling a centric role of business staff, reducing use of approval documents and learning from each project. In IT governance, applying a centralized or decentralized development were the two practices. Regarding practices in technical factors, this thesis identifies integrating data through either building an enterprise-wide data warehouse or applying an appropriate modeling approach while managing multiple data warehouses, using multiple front-end applications, and adopting cloud business intelligence. The findings of this thesis provide organizations with a pool of practices that can be used to enhance business intelligence agility

Moderating effect of gender and age on the relationship between emotional intelligence with social and academic adjustment among first year university students

This study examined whether emotional intelligence is significantly correlated with social adjustment and academic adjustment. It also explored the moderating effects of gender and age factors and their linked between emotional intelligence and social adjustment as well as academic adjustment among first year university students. 289 first year university students (148 males and 141 females) at the Irbid Govern Orate, North of Jordan, participate in the study and were categorized based on two age groups, younger students between the age of 18 – 25 and older students between the range of 26 and above. Two valid and reliable instruments were used to assess student’s emotional intelligence, social adjustment and academic adjustment. Correlation and multi-group analysis using structural equation model were used to analyse these data. The result shows no significant relationship between emotional intelligence and of both social adjustment and academic adjustment. In addition, the moderating effect of gender was not found. However, the moderating effect of age on the relationship between emotional intelligence with social adjustment and academic adjustment were established

Team Building Activities

This study sought to determine the potential impact of team building activities on anti-social behaviors in an urban fifth grade classroom. Team building activities are a pleasurable way to engage students in meaningful learning that has benefits on social, emotional, and academic development. The research was conducted in an urban elementary school in Western New York. The entire class participated in the team building activities. However, five students were selected for observational data collection. Various research tools were utilized to collect and analyze data such as: observation checklists, surveys, interviews, student response sheets, and a researcher\u27s journal. Data illustrated that team building activities contributed to a decrease in anti-social behaviors in the classroom

A linear algebraic approach in analyzing the M/GE/1 and GE/M/1 queuing systems at equilibrium

Uses the algebraic approach in the queuing theory to derive the M/G/1 equilibrium solution for the number of jobs in the system when the probability distribution function representing the general distribution is the generalized exponential (GE-type). Similarly the GE/M/1 system is solved. Furthermore, it has been shown that as expected the solutions are equivalent to the maximum entropy solutions of the M/G/1 and G/M/1 systems respectively at equilibrium

Stability and removal of several statins from wastewater using different treatment technologies

Atorvastatin (ATO), Rosuvastatin (RST) and Simvastatin (SIM) are commonly used drugs that belong to the statin family (lowering human blood cholesterol levels) and have been detected as contaminants in natural waters. Stability and removal of statins from wastewater produced at Al-Quds University Campus were investigated. Kinetic studies in pure water (abiotic degradation), in sludge (biodegradability) and in Advanced Oxidation Processes (AOPs) at room temperature were investigated. Heterogeneous photocatalysis using the semi- conductor titanium dioxide (TiO2) has proven to be a promising treatment technology for water purification. The degradation reactions of the three drugs in wastewater at room temperature follow first order kinetics with rate constants of 2.2 x 10-7 s-1(ATO), 1.8 x 10-7s-1 (RST) and 1.8 x 10-6 s-1 (SIM), which are larger than those obtained in pure water under the same conditions, 1.9x 10-8 s-1 (ATO), 2.2x 10-8s-1 (RST) and 6.2 x 10-7 s-1 (SIM). AOPs process was proposed and applied. TiO2, used as catalyst, owns two important properties: high photo-catalytic activity and low cost. Photo-degradation of Atorvastatin was much faster under light irradiation in presence of TiO2 (photocatalysis) (t1/2 = 1.15 hours, 0.704h-1) than under Suntest irradiation (photolysis) (t1/2 = 5.0 hours, 0.165h-1). Degradation products were identified by LC-MS and LC/MS/MS. The overall performance of the wastewater treatment plant (WWTP) installed in Al-Quds University Campus towards the removal of these drugs was assessed showing that more than 90% of spiked ATO, RST and SIM were removed. In order to evaluate the efficiency of alternative removal methods to replace ultra-filtration membranes, adsorption isotherms for the three statins were investigated using both activated carbon and clay-micelle complex as adsorbents and AOP’s as a post treatment. The batch adsorption isotherms for the three statins were found to fit Langmuir equation, with larger number of adsorption sites and binding affinity for micelle-clay composite compared to activated carbon and filtration experiments of the three statins and their corresponding metabolites demonstrated a more efficient removal by micelle-clay filters

The Impact of Residential Optimally Designed Rooftop PV System on Libya Power Shortage Case

The average yearly hours of sunshine in Libya reaches 3200 hours and solar irradiance rate approximately ranges from 6 to 7kWh/m2/day. However, small solar parks projects are now undergoing and some are lately under cadastral and field survey. In meanwhile, $922.7M is the average annual government fund paid for electricity generation sector. It thus results in Tariff of 0.082$/kWh. This paper studies the potential of hybrid rooftop PV solar systems to supply household appliances and then proposes a 5.65 kWp PV solar system appropriate for Libyan home’s rooftop to mitigate the consequences of load shedding due to electric power shortage. Accordingly, oil uses in electricity generation will be gradually reduced as a result to rooftop PV systems widely spread. Finally, the overall benefits, simulation summery and implementation approach are provided

Sheikh Bin Wan Ismail Wan Abdul Qadir (d. 1965) And His Efforts in the Field of Islamic Faith

Wan Ismail Shaikh Abdul Qadir was one of the Ulema, he known to struggle in spreading Islamic Aqedah and development in the Patani region in particular and generally in Malay region, this study will provide an overview of his life and contribution to science, and also the study of the struggle to spread knowledge in the Islamic faith. One of the relics of his work is "Bakurah أل أماني for the Layman Patani" is the greatest work of his in the Islamic Aqedah Science until recently used as a guide and reference in the study of science aqidah in the Malay region