Hill Cipher is one of the symmetric key algorithms in cryptography, we discussed Encryption

and decryption for the alphabet Arabic by Hill cipher encryption and descriptions using the

invertible matrix as a key. In this study, we introduce a new method on the Hill Cipher for the

alphabet Arabic using a rectangular matrix as a key.

Nasal carriage of MRSA among hospital personnel is a big problem in hospital environment. Accordingly, the main objective of current study was to determine the prevalence of MRSA among Health Care Workers (HCWs) in Yafran hospital. 108 HCWs samples of nasal swabs were collected, and cultured on Mannitol Salt Agar. The isolates were identified as S. aureus based on morphology. Besides, confirmatory tests were performed, including coagulase and catalase test. Finally, cefoxitin disc resistance was used to identify the MRSA strain. Antibiotic susceptibility testing of MRSA was performed according to the guidelines of the Clinical and Laboratory Standards Institute .

The results showed that, out of the 108 HCWs, 37 (34%) carried MRSA. MRSA carriage rate was highest among Administration Department workers 30 % compared to other professions, followed by Emergency Department workers 21% , Obstetrics and Gynecology workers 19 %, Radiology, Laboratory and Internal Medicine Department workers was 8% ,5% and 5% respectively. Tetracycline showed the highest rate of resistance among MRSA isolates 27%, followed by Vancomycin 22%. While the Ciprofloxacin showed less resistance 11%. In conclusions, the high rate of nasal MRSA carriage among healthcare workers found in this study is alarming and highlights the need for adjusted infection control measures to prevent MRSA transmission from HCWs to the vulnerable patient .

In this paper, deploying an integrator, we propose a method to transform ultra wideband (UWB) signal into a frequency hopping type of transmission signal that is applied in Bluetooth technology. In addition to the tremendous increase in data transfer speed, the frequency domain equalization is further extended to Bluetooth technology, as a result. This paper further shows that both technologies can be deduced from each other although UWB is a carrierless while Bluetooth requires a transmission carrier.

The Hill cipher is considered the first encryption technology that has some

advantages in encrypting data. The aim of this research is to modify the Hill

cipher to process letters of the Arabic alphabet. We have proven the success of

the Hill encryption on letters of the Arabic alphabet and the research was

supported by a number of different examples which were then processed using

MATLAB.

The electrospun yarn for sutures has gained worldwide attention due to its fine fibers that resemble the extracellular matrix and its abundant functional sites. However, the use of a large number of toxic solvents poses safety risks and environmental pollution during production, making it challenging to directly apply electrospun yarn in the biomedical field. In this study, an environmentally friendly and safe method without toxic solvents was proposed for preparing antibacterial PLA ultrafine fiber sutures. This method involves melt electrospinning, hot‐stretching, low‐temperature plasma treatment, and chitosan grafting. The PLA ultrafine fiber sutures exhibit a high tensile strength which is 2.04 N before knotting and 1.57 N after knotting. The suture diameter is 118.7 μm and average fiber diameter is 1.72 μm. Chitosan grafted on the fiber surface provides excellent antibacterial properties for the sutures, with …

The new era of distance education opens up a new problem space for researchers to redefine educational needs. The COVID-19 lockdown with its tremendous consequences has affected the way of thinking and acting and has highlighted the merits of distance education. One of the most important of these problems is the inability of the lecturer technically to manage and present remote lectures, which resulted in the student's dissatisfaction with distance education. In this research, we have studied how to facilitate the work of the lecturer, who suffers from many problems, including the technical issues that need technical competencies in the field of information technology and modern technologies used in distance education, including the simulation system and displaying the system via the Internet, studying how to help the student also, in receiving distance education techniques and dealing with the programs used by the lecturer in skillfully presenting educational curricula. For that, the research focused on studying how to use a team to facilitate this work called the E-Learning Facilitator Team. This team plays a vital role in developing and maintaining an online program that is effective, and smooth, and that will support the realization of the planned learning outcomes. Faculty delivering courses online must be more than transmitters of knowledge; they must become facilitators of learning. Some highly seasoned instructors from the traditional on-ground environment will quickly adapt to the online model, while others may find the transition challenging at first [10].