Registration System for the Faculty of Science - Sana'a University

The purpose of this project is to develop a computerized registration system for Faculty of Science in Sana' a University - Yemen, since the registration system in the faculty still manual. This system was developed using Oracle as a DBMS, because of the facilities it provides such as, unlimited database and high-speed data access. The waterfall model was the model that has been chosen to develop this system because it does not require a user feedback like prototyping model or some other models and this is because this project has been developed in a different place (i.e. not in the same country of the Sana'a University). With this system, the registration process can be easily done accurately, faster, and with more security than the manual process

Amtree Protocol Enhancement by Multicast Tree Modification and Incorporation of Multiple Sources

Multicasting is a process of sending packets from one source (multiple sources) to multiple destinations. In mobile environment, when the source is mobile and migrates to a new location, the multicast tree needs to be rebuilt. AMTree is an active network based protocol intended to make the sending packets to the tree after source migration an efficient process without much modifications to the multicast tree. It is separated into three phases: 1) construction of multicast tree. 2) Handoff process. 3) Optimization Process. In AMTree protocol, after source migration, handoff latency is computed from the time of reconnecting to a new base station until finding nearest core to the mobile source. This process takes a long time and the number of messages sent is at least equal to the number of cores in the tree. In optimization, the number of nodes that requesting optimization is high. This means the time of optimization process is also high. In addition, AMTree protocol is proposed for multicast with a single source. This thesis proposes some techniques to enhance the AMTree protocol. First we propose two algorithms to improve the handoff process in AMTree protocol. Second we introduce a new method to construct the multicast tree in AMTree protocol. Third technique is incorporating multiple sources in AMTree protocol. This is an extension to AMTree Protocol. The results from experiments show that handoff latency using the new algorithms is much lower than using AMTree handoff procedure in both cases, i.e. when the source connects to a subscribed base station or not subscribed base station. By modifying the multicast tree, the number of nodes to be optimized was reduced. Also the optimization time was minimized. Incorporation of multiple sources in AMTree protocol resulted with minimized end‐to‐end latency after handoff and after optimization

New algorithms to minimize handoff latency in AMTree protocol

In active networks, programs can be injected to network elements (routers/switches). This allows programmers to enhance existing protocols or deploy new protocols. AMTree protocol is an active network based protocol that makes sending packets to receivers, after source migration, an efficient process. In AMTree protocol, after source migration, handoff latency computed from the time of reconnecting to a new base station until finding nearest core to the mobile source. In this paper the authors present two new algorithms to minimize the handoff latency in AMTree protocol. They show that handoff latency is much lower than that of AMTree handoff algorithm if the mobile source connects to a base station which is subscribed to the multicast group

A Histopathological Study of the Therapeutic Role of Kisspeptin-10 Against Cadmium Chloride Toxicity in Rats

Kisspeptin is originally a metastasis suppressor. Currently, post preliminary discovery, the crucial physiology of kisspeptin appeared among several biological function in the living body such as supporting the reproductive system, regulation the metabolism, improvement the cardiac muscle action and smooth muscle of blood vessels. Moreover, Kisspeptin play an important role as a neurotransmitter through the Kisspeptin receptor. This study is designed to examine the anti-toxic role of Kisspeptin in some vital organs including the liver, spleen, and kidney. Kisspeptin is demonstrated as a detoxification agent via the elimination of toxicity of cadmium chloride to some organs of living rats such as the liver, spleen, and kidney. Direct negative effects of Kisspeptin on these organs have only been recognized. This study attempts to explain this role during the examination of histopathological changes in the case of cadmium chloride toxicity and the effect of Kisspeptin in reducing or elevating the toxicity after its administration in both 20 and 40 nanomolar / animal doses. Arguments and recent boundaries in the field, as well as areas of coming research related to kisspeptin’s varied function array, should underline

Modifying the multicast tree in AMTree protocol using random core selection

One of two approaches used to construct the tree in multicast protocols, either shortest path tree approach, or core based tree approach. In AMTree protocol, the shortest path tree approach is used with incorporation of the idea of core from core based tree approach. In this paper we propose a new technique for constructing the multicast tree using pre-selected nodes to act as cores. The idea of the proposed technique is to reduce the optimization time and the number of nodes invoking for optimization. The experiments show that the number of nodes asking for optimization process is minimized and the optimization time is reduced too. Furthermore, tree efficiency for AMTree using the proposed technique is better than that of AMTree without it

Cloud Computing Delivery and Delivery Models: Opportunity and Challenges

The rapid growth of Internet and computing field results in several technological advantages. In the meanwhile, security challenges that emerge along with the growth complicate the aspects of cloud based computing. Security is by now one of the most pressing concerns in Internet business where cloud computing lies in. Cloud-based services are evolving each day introducing new business trends. Since cloud computing entails storage of information in remote servers, unauthorized access to such sensitive information becomes a looming concern. The advantages offered by cloud computing, without robust security measures and flexibility, could lead to lose its credibility. This paper reviews various aspects of cloud computing and issues inherent within its contexts. This paper has identified the gap within the topic of study through the creation of the conceptual framework, which is designed as the way of attempting to connect the different concepts. The intention of the theoretical framework is to determine the potential gaps in the research and link the gaps by the present study and its results. The delivery of both, the cloud computing as well as its models is a relatively new phenomenon within the academic libraries where the study is at the stages of nascent. The conceptual framework could not be comprehensive. Instead, it was a progressive work. Thus, this new topic could be added to form the branch within the theoretical framework. This article tries to look at different concepts of cloud computing as well as the issues, which are inherent within its contexts. It analyzes this part due to the advent and growth in the sector of cloud computing, which is developing the platform for the computing in the future

Cloud computing services and its Effect on tertiary education : Using google classroom

This paper examines the effectiveness of the Google Classroom App in learning for higher education institutions in Oman. The massive advancement in technology has contributed to changes in learning and delivery of learning resources in the classroom. Thus, it has saved the resources and reduced the cost of learning associated with the traditional learning model. The main goal of this paper is to investigate the students' perception about the cloud computing services accessibility, ease of use and usefulness by measuring the implementation effectiveness of Google Classroom as a mode of teaching. This study used quantitative approach mode to determine the effectiveness and the effect of using Google Classroom e-learning model, 225 completed questionnaires were analyzed using SPSS tool. Its evident that using Google Classroom for the learning is more effective and gained highest level of satisfaction among the learners. As a general result of this work students can use Google classroom in very comfortable and easy way really on the ability of online, remote, and time unconstrained conditions. The students also like to learn through the lecturer with the support of google classroom

Additive manufacturing of Ti-alloy: Thermal analysis and assessment of properties

In this study, 3D printing of Ti6Al4V alloy is realized and the characteristics of the printed layer are examined. The morphological structures and metallurgical changes in the printed layer are assessed. Temperature and stress fields are simulated in line with the experimental conditions. Since the air gaps are present in between the loose alloy powders prior to the printing, the effective properties incorporating the air fraction are determined and the effective properties are used in the simulations. Thermal conductivity of the loose alloy powders with the presence of air gaps is determined by incorporating the virtual experimental technique. It is found that the printed layer is free from micro-cracks and large scale asperities; however, some small pores sites are observed because of the release of air around the loose powders during the printing. Microhardness of the printed surface is higher in the top surface of the printed layer than that of as-received solid alloy. In addition, the friction coefficient of the printed surface remains lower than that of the conventionally produced solid surface. The columnar structures are formed in the mid-section of the printed layer and slanted grains are developed in the region of the top and the bottom surface of the printed layer.The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: The authors acknowledge the financial support of King Fahd University of Petroleum and Minerals (KFUPM) in Saudi Arabia, Gazi University and TAI (SAYP Project DDKIG1) in Turkey and King Abdullah City for Atomic and Renewable Energy (K.A.CARE) to accomplish this work

Association between inter-arm blood pressure difference and cardiovascular disease: result from baseline Fasa Adults Cohort Study

The inter-arm blood pressure difference has been advocated to be associated with cardiovascular mortality and morbidity. Our study aimed to investigate the association between Inter-arm systolic and diastolic blood pressure differences and Cardio Vascular Disease (CVD). A total of 10,126 participants aged 35–70 years old were enrolled in a prospective Fasa Persian Adult Cohort. In this cross-sectional study, the cutoff values for inter-arm blood pressure difference were less than 5, greater than 5, greater than 10, and greater than 15 mm Hg. Descriptive statistics and logistic regression were used to analyze the data. Based on the results the prevalence of ≥ 15 mmHg inter-arm systolic and diastole blood pressure difference (inter-arm SBPD and inter-arm DBPD) were 8.08% and 2.61%. The results of logistic regression analysis showed that inter-arm SBPD ≥ 15 and (OR<5/≥15 = 1.412; 95%CI = 1.099–1.814) and inter-arm DBPD ≥ 10 (OR<5/≥10 = 1.518; 95%CI = 1.238–1.862) affected the risk of CVD. The results showed that the differences in BP between the arms had a strong positive relationship with CVD. Therefore, inter-arm blood pressure could be considered a marker for the prevention and diagnosis of CVD for physicians

Global, regional, and national burden of chronic kidney disease, 1990–2017 : a systematic analysis for the Global Burden of Disease Study 2017

Background Health system planning requires careful assessment of chronic kidney disease (CKD) epidemiology, but data for morbidity and mortality of this disease are scarce or non-existent in many countries. We estimated the global, regional, and national burden of CKD, as well as the burden of cardiovascular disease and gout attributable to impaired kidney function, for the Global Burden of Diseases, Injuries, and Risk Factors Study 2017. We use the term CKD to refer to the morbidity and mortality that can be directly attributed to all stages of CKD, and we use the term impaired kidney function to refer to the additional risk of CKD from cardiovascular disease and gout. Methods The main data sources we used were published literature, vital registration systems, end-stage kidney disease registries, and household surveys. Estimates of CKD burden were produced using a Cause of Death Ensemble model and a Bayesian meta-regression analytical tool, and included incidence, prevalence, years lived with disability, mortality, years of life lost, and disability-adjusted life-years (DALYs). A comparative risk assessment approach was used to estimate the proportion of cardiovascular diseases and gout burden attributable to impaired kidney function. Findings Globally, in 2017, 1·2 million (95% uncertainty interval [UI] 1·2 to 1·3) people died from CKD. The global all-age mortality rate from CKD increased 41·5% (95% UI 35·2 to 46·5) between 1990 and 2017, although there was no significant change in the age-standardised mortality rate (2·8%, −1·5 to 6·3). In 2017, 697·5 million (95% UI 649·2 to 752·0) cases of all-stage CKD were recorded, for a global prevalence of 9·1% (8·5 to 9·8). The global all-age prevalence of CKD increased 29·3% (95% UI 26·4 to 32·6) since 1990, whereas the age-standardised prevalence remained stable (1·2%, −1·1 to 3·5). CKD resulted in 35·8 million (95% UI 33·7 to 38·0) DALYs in 2017, with diabetic nephropathy accounting for almost a third of DALYs. Most of the burden of CKD was concentrated in the three lowest quintiles of Socio-demographic Index (SDI). In several regions, particularly Oceania, sub-Saharan Africa, and Latin America, the burden of CKD was much higher than expected for the level of development, whereas the disease burden in western, eastern, and central sub-Saharan Africa, east Asia, south Asia, central and eastern Europe, Australasia, and western Europe was lower than expected. 1·4 million (95% UI 1·2 to 1·6) cardiovascular disease-related deaths and 25·3 million (22·2 to 28·9) cardiovascular disease DALYs were attributable to impaired kidney function. Interpretation Kidney disease has a major effect on global health, both as a direct cause of global morbidity and mortality and as an important risk factor for cardiovascular disease. CKD is largely preventable and treatable and deserves greater attention in global health policy decision making, particularly in locations with low and middle SDI