http://localhost:8080/xmlui/handle/123456789/561 2026-10-16T03:13:54Z http://localhost:8080/xmlui/handle/123456789/566 A proposal Statistical Model for Ranking LDCs Universities Mohammed Ahmed Osman; Rashid A. Saeed The so-called third goal of universities—community services, teaching quality, and scientific research seem to be the metrics used by the global ranking of universities to assess how well these institutions are performing via their websites. The third mission was divided into three categories, as this paper explains. The significance of measuring these categories and indicators is discussed in the paper. The study employed statistical software for data analysis, SmartPLS software for model validation, and questionnaires to gather information from subject matter experts. The categories of appropriate indicators and weights for each to be used in measuring research, teaching, social engagement, knowledge transfer, and innovation at universities are shown in the results. Finally, the study introduces university rankings model for Sudan and LDCs. 2024-12-01T00:00:00Z http://localhost:8080/xmlui/handle/123456789/565 Analysis of energy and heat performance and its impact on passive cooling using environmental analysis software (Khartoum State) Mohammed Hussein haj Hamad fadleleseed The paper focuses on studying the behavior of the sun’s movement during a building model in Khartoum State, by studying the results of common daylight simulation programs with data measured on-site and in the virtual situation. Verifies the accuracy and limitations of programs when used to calculate daylight illumination or light reflected from other buildings under conditions varying by month or year. The aim of the study is a systematic approach between the actual and expected results and possible predictions, choosing the appropriate design options according to the climatic situation of the region. The study concluded that simulating the diffused daylight in the northern and western facades in particular is the hottest of the year, and this lies in the fact that the treatments and materials used as sun refractors were Tested using Climate Consultant 6.0 programmers, as well as good correlation at low values and higher values in the average thermal comfort, in addition to the size. Information that helps through the Climate Consultant 6.0 programs, and on the other hand, CLIMAPLUS programs, clarifies the important factors that help reduce energy consumption and makes clear to us the aspects What is mitigated is the use of false ceilings and double glazing and the use of materials with poor heat transfer coefficients. We can summarize that the role of programs is very important to save time and save energy Khartoum, Sudan. 2024-12-01T00:00:00Z http://localhost:8080/xmlui/handle/123456789/564 Study on Performance of Cyclone Separator on Vapour Compression Refrigeration Systems Alaeldeen Altag Yousi; Khider Mohammed K. Elnoor Carrying of Liquid particles within gas flow on vapour compression refrigeration systems can cause serious problems in process plant and operation. Cyclone separator is a simple, compact, low weight, low cost and high efficiency separator. This paper is focused in study the performance of cyclone separator for separating liquid particles in vapour compression refrigeration system. Mathematical models and computer program (MATLAB) have been used to study the performance, settling velocity and cut-point diameter. The results shown that: the performance for the cyclone separator increases as the mass particles and inlet velocity increased. In addition, the collection efficiency of the cyclone increased linearly as the mass of particles and inlet velocity increased. Moreover, the collection efficiency increased as the cut-point diameter decreased. 2024-12-01T00:00:00Z http://localhost:8080/xmlui/handle/123456789/563 Red Sea State Tourist Guide Application “Designing an application for users and a website for management tourist and service areas in the Red Sea State” Mohammed SeedAhmed Mohammed Mukhtar; MohammedAhmed Mohammed Ibrahim; A h m e d I b r a h i m A b d a l l a; Mona Abdelhag Abdelgader This scientific paper showcases the design of an innovative Android application that serves as a comprehensive tourist guide, featuring an array of attractions and service locations, supported by a robust website for effective management. Our proposed tourist guide application is expertly crafted to tackle the challenges facing tourism in the Red Sea State by actively promoting key attractions and service facilities. It is designed to meet the needs of today’s travelers, enabling users to effortlessly explore numerous tourist and service areas, access detailed information, and view precise geographical locations on a map. With clear guidance on routes and estimated travel times, the application ensures users can navigate with confidence. Moreover, the ability to save favorite spots and search for specific locations, along with the option to update personal information, enhances the overall user experience. The accompanying website empowers administrators to efficiently add or remove tourist and service areas, manage application users, and monitor their locations and usage durations. This feature greatly enhances tourist safety, particularly in the event they stray from their intended path. Developed using Flutter and Visual Studio Code, along with the Firebase database, this application is at the cutting edge of technology. The website, designed with HTML and CSS within Visual Studio Code and utilizing the Firebase database, provides users all the essential information needed for seamless and secure navigation to their desired destinations. Users can confidently embark on their journeys, knowing they have all the necessary tools at their disposal for a safe and enjoyable experience. 2024-12-01T00:00:00Z