Publicationshttp://repository.limu.edu.ly/handle/123456789/432024-03-29T11:17:13Z2024-03-29T11:17:13ZTaguchi’s design’s Optimization of Commercial Steel Welding made by Semi-Automated GTAWSaleh, Elfallahhttp://repository.limu.edu.ly/handle/123456789/48742024-01-15T09:06:44Z2023-05-21T00:00:00ZTaguchi’s design’s Optimization of Commercial Steel Welding made by Semi-Automated GTAW
Saleh, Elfallah
Abstract:
GTAW is a widely used welding process in industry. It has advantageous mechanical and metallurgical properties over other welding processes such as GMAW. In order to obtain optimal welding conditions, it’s vital to optimize the welding parameters. Commercial steel also referred as mild steel is often used for construction that needs to yield tensile strength. The later was reported to be sensitive to the hardness of welding. The work is to investigate the influence or effect of the transverse tensile strength and hardness of mild steel welding made by semi-controlled GTAW at a variation of groove shape, welding current, and welding speed. The analysis made with Taguchi’s design orthogonal array technique to demonstrate the effect of the welding parameters and optimize these parameters on the tensile strength of the welding. The results showed that higher transverse tensile strength showed higher welding hardness (i.e., 232 MPa and 2555 VHN shown at V-shaped welding). The tensile strength and hardness increased at lower welding current (170 A), V-shaped welding, and higher welding speed (150 mm/min). This combination has shown optimal conditions for stronger and highly effective GTAW welding. The increased internal stresses in welding caused lower transverse tensile strength and hardness of welding. Possibly the lower interpass heat input to increase and thus, lower transverse tensile strength of welding.
2023-05-21T00:00:00ZKnowledge and Perception of Physicians Towards Telemedicine Technology in Hospitals in LibyaAyat Fakri, AhmedAnees, AlhudiriMaatuk, AbdelsalamElghriani, Abdelbaset Mhttp://repository.limu.edu.ly/handle/123456789/48732024-01-15T09:06:25Z2023-10-31T00:00:00ZKnowledge and Perception of Physicians Towards Telemedicine Technology in Hospitals in Libya
Ayat Fakri, Ahmed; Anees, Alhudiri; Maatuk, Abdelsalam; Elghriani, Abdelbaset M
Telemedicine technology has witnessed an increasing interest in healthcare institutions to provide health services to patients during outbreaks of epidemics due to the precautionary measures taken by many countries around the world. Many patients received ongoing, regular telemonitoring from their healthcare providers. However, the success of telemedicine is highly dependent on physicians' acceptance. Despite all the benefits associated with the use of this technology and its applications, it is not given the required consideration in Libyan health institutions. This paper explores physicians' knowledge and perceptions of telemedicine technology in hospitals. This study aimed to assess the level of knowledge possessed by physicians regarding telemedicine and their perceptions of its use in hospital settings. A survey was conducted for physicians working in a private Libyan hospital, where the sample used in the study was 60, and the questionnaire was distributed to them. The results of the study showed that (70.4%) of the physicians know about telemedicine, although they are not familiar with its applications, as they did not attend introductory lectures on telemedicine in their workplaces. The results provided insights into the current understanding and attitudes of clinicians towards telemedicine technology, which can guide strategies for its effective integration into healthcare systems. However, the results indicated some potential barriers when using telemedicine, including the need for training, poor infrastructure, financial issues, and lack of human resources to operate the equipment, which negatively affects the application of telemedicine in Libyan hospitals.
2023-10-31T00:00:00ZCybersecurity Challenges to VANET When RFID Tags Utilized: a StudySami, BenamerMariam k, DarbiYounis A, YounisAinor H, Shembeshhttp://repository.limu.edu.ly/handle/123456789/48412023-08-28T09:03:17Z2023-07-06T00:00:00ZCybersecurity Challenges to VANET When RFID Tags Utilized: a Study
Sami, Benamer; Mariam k, Darbi; Younis A, Younis; Ainor H, Shembesh
An emerging new technology called the Vehicular Ad Hoc Network (VANET) uses wireless technologies to enhance inter-vehicle communications and traffic safety. Due to its hybrid network designs, node movement characteristics, and novel application scenarios, VANET differs from other types of ad hoc networks. Moreover, the VANET utilizes some technologies for navigating. One of these technologies is Radio Frequency Identification (RFID) technology, which is used in many fields and applications to facilitate good communication and management of resources. Although RFID technology helps reduce the complexity of everyday life, it faces some challenges, the most important of that is security, which will be addressed in this paper. This paper extensively surveys the most severe cybersecurity challenges and attacks on VANET-RFID.
2023-07-06T00:00:00ZA Bird’s Eye View on Aspect Oriented Requirements EngineeringAlshareef, SohilMaatuk, AbdelsalamAbdelaziz, TawfigAljawarneh, Shadihttp://repository.limu.edu.ly/handle/123456789/45542022-11-10T19:31:49Z2022-07-04T00:00:00ZA Bird’s Eye View on Aspect Oriented Requirements Engineering
Alshareef, Sohil; Maatuk, Abdelsalam; Abdelaziz, Tawfig; Aljawarneh, Shadi
Aspect-oriented software development builds on the concept of separation of concerns. It is concerned with addressing and handling the scattering and tangling issues related to the object-oriented paradigm. The traditional requirements engineering approach cannot address crosscutting concerns properly, which results in the occurrence of the tyranny of the dominant decomposition. Aspect-oriented requirements engineering (AORE) supports identifying and handling crosscutting concerns at the early stages of software development. The approaches and techniques of AORE are an extension of the traditional requirements engineering approaches like viewpoints, use cases, and goal-oriented, while some approaches are purely designed with aspect orientation in mind. This paper surveys the most relevant and popular AORE approaches. Most of the approaches support analysis and design. The focus is on the approaches in the requirements analysis phase. A critical evaluation is set to compare each proposal against the defined activity in requirements analysis. The evaluation of the approaches through the defined criteria showed that the validation and verification of AORE artifacts are not given much attention and focus compared to the identification and treatment of concerns and aspects. The key elements of validation and verification supported by AORE approaches are outlined and discussed.
2022-07-04T00:00:00Z