Universal Current-Controlled Current-Mode Filter with Threeinputs and One-Output Using the Current Controlled Conveyor

A new current-mode universal filter is proposed. The filter uses five current-controlled current-conveyors (CCCII) and can realise lowpass, highpass, bandpass, notch and allpass responses. The parameters ω0, (ω0/Q0) can be controlled by adjusting the bias currents of the CCCIIs. The proposed circuit enjoys low sensitivities

العوامل المؤثرة في تقبل الفصول الافتراضية لدى طلبة كلية التربية الأساسية بالكويت في ضوء نموذج قبول التقنية TAM - Factors influencing the acceptance of virtual classes among students of the Faculty of Basic Education in Kuwait in light of the TAM technology acceptance model

من أهم معايير نجاح استخدام التكنولوجيا في التعليم هو رضى المستفيدين منها وتقبلهم لها. لذا هدف هذا البحث إلى الكشف عن العوامل المؤثرة على تقبل الفصول الافتراضية لدى طلبة كلية التربية الأساسية في دولة الكويت في ضوء نموذج قبول التقنية TAM . ولتحقيق أهداف البحث واختبار فرضياته، تم استخدام المنهج المسحي، واختيار عينة قصدية بلغت ) 400 ( من طلبة كلية التربية الأساسية في الكويت خلال الفصل الأول من العام الجامعي 2018 - 2019م، وتمثلت أدوات البحث في إعداد وتصميم استبانة تكونت من ثلاثة أجزاء رئيسية، وبعد جمع بيانات البحث وتحليلها احصائياً أثبتت النتائج وجود علاقة إيجابية بين النية لاستخدام الفصول الافتراضية وعوامل الفائدة المحققة وسهولة استخدام تقنية التعليم المتاحة في الفصول الافتراضية لدى طلبة كلية التربية الأساسية في الكويت، وكذلك علاقة إيجابية بين العوامل المستقلة) الدعم الفني، التفاعل في التعليم، والكفاءة الذاتية (والفائدة المحققة، وسهولة استخدام تقنية التعليم المتاحة في الفصول الاف تراضية لديهم، وعلاقة إيجابية أيضاً بين العوامل المستقلة الدعم الفني، التفاعل في التعليم والكفاءة الذاتية( ونية الطلبة حول استخدام الفصول الافتراضية من خلال الفائدة المحققة وسهولة الاستخدام كعوامل وسيطة لدى الطلبة، إلا أنه لا يوجد تأثير لنوع جنس الطلبة في قبولهم لاستخدام التقنيات المتاحة في الفصول الافتراضية، ويوجد تأثير للخبرة في ذلك، وتم الانتهاء بذكر عدد من التوصيات التطبيقية لنتائج البحث. ***************************************************************************** The successful use of technology in education relies primarily on the satisfaction and acceptance of its beneficiaries. This research aims to reveal the factors influencing the understanding of students of Faculty of Education in Kuwait for the virtual classrooms in the light of their acceptance for the TAM Technique. Survey methodology and selection of 400 students from Faculty of Education in Kuwait as a sample during the first semester in the academic year 2018-2019 are two methods used to achieve the goals of the research and test its hypotheses. The research develops a questionnaires consists of three major parts. After collecting and analysing the data statistically ,the results proves that there is a positive relationship between the intent of using virtual classrooms, usefulness factors and the ease of using technical education in virtual classrooms for the students in Faculty of Education in Kuwait. The research also shows that there is a positive relationship betweet the independent factors such as (technical support, interactions in teaching and self-efficacy) and the usefulness and the ease of using technical education in virtual classrooms for the students. Another positive relationship is discussed by this research connects the independent factors (technical support , interactions in teaching and self-efficacy) , the students' intention of using the virtual classrooms through the usefulness and the ease of use as a feedstock for them. Besides , it is indicated that the gender of the students has no effection in their acceptance for using the information technology in virtual classrooms however the experience palys a vital role in that. The research concludes with a mention of some applied recommendations for the results of this research

Hepatoprotective Effects of Silybum marianum

Oxidative stress, lipid peroxidation, and transaminase reactions are some of the mechanisms that can lead to liver dysfunction. A time-dependent study was designed to evaluate the ability of silymarin (SLN) and glycyrrhizin (GLN) in different dosage regimens to lessen oxidative stress in the rats with hepatic injury caused by the hepatotoxin carbon tetrachloride. Wistar male albino rats (n = 60) were randomly assigned to six groups. Group A served as a positive control while groups B, C, D, E, and F received a dose of CCl4 (50% solution of CCl4 in liquid paraffin, 2 mL/kg, intraperitoneally) twice a week to induce hepatic injury. Additionally, the animals received SLN and GLN in different doses for a period of six weeks. CCl4 was found to induce hepatic injury by significantly increasing serum alanine aminotransferase, aspartate aminotransferase, alkaline phosphatase, and thiobarbituric acid reactive substances while decreasing total protein and the activities of reduced glutathione, superoxide dismutase, and catalase. Treatment with various doses of SLN and GLN significantly reduced ALT, AST, ALP, and TBARS levels and increased GSH, SOD, and CAT levels. Our findings indicated that SLN and GLN have hepatoprotective effects against oxidative stress of the liver

Evolving trends in the management of acute appendicitis during COVID-19 waves. The ACIE appy II study

Background: In 2020, ACIE Appy study showed that COVID-19 pandemic heavily affected the management of patients with acute appendicitis (AA) worldwide, with an increased rate of non-operative management (NOM) strategies and a trend toward open surgery due to concern of virus transmission by laparoscopy and controversial recommendations on this issue. The aim of this study was to survey again the same group of surgeons to assess if any difference in management attitudes of AA had occurred in the later stages of the outbreak. Methods: From August 15 to September 30, 2021, an online questionnaire was sent to all 709 participants of the ACIE Appy study. The questionnaire included questions on personal protective equipment (PPE), local policies and screening for SARS-CoV-2 infection, NOM, surgical approach and disease presentations in 2021. The results were compared with the results from the previous study. Results: A total of 476 answers were collected (response rate 67.1%). Screening policies were significatively improved with most patients screened regardless of symptoms (89.5% vs. 37.4%) with PCR and antigenic test as the preferred test (74.1% vs. 26.3%). More patients tested positive before surgery and commercial systems were the preferred ones to filter smoke plumes during laparoscopy. Laparoscopic appendicectomy was the first option in the treatment of AA, with a declined use of NOM. Conclusion: Management of AA has improved in the last waves of pandemic. Increased evidence regarding SARS-COV-2 infection along with a timely healthcare systems response has been translated into tailored attitudes and a better care for patients with AA worldwide