Lightweight Mutual Authentication Protocol for Low Cost RFID Tags

Radio Frequency Identification (RFID) technology one of the most promising technologies in the field of ubiquitous computing. Indeed, RFID technology may well replace barcode technology. Although it offers many advantages over other identification systems, there are also associated security risks that are not easy to be addressed. When designing a real lightweight authentication protocol for low cost RFID tags, a number of challenges arise due to the extremely limited computational, storage and communication abilities of Low-cost RFID tags. This paper proposes a real mutual authentication protocol for low cost RFID tags. The proposed protocol prevents passive attacks as active attacks are discounted when designing a protocol to meet the requirements of low cost RFID tags. However the implementation of the protocol meets the limited abilities of low cost RFID tags.Comment: 11 Pages, IJNS

Effect of Small Interfering RNAs on in Vitro Replication and Gene Expression of Feline Coronavirus

Feline corononavirus (FCoV) infection is ubiquitous in domestic cat populations worldwide and is usually associated with subclinical or mild enteritis. However, in some cats infection may result in the development of a fatal progressive disease called feline infectious peritonitis (FIP). FIP is considered to be the major cause of infectious-related death in pet cats. Currently, there is no protective vaccine or curative treatment to this highly fatal disease. In this study, we evaluated the ability of small interfering RNAs (siRNAs) to inhibit the in vitro viral replication and gene expression of FCoV as a potential treatment for FIP. Five synthetic siRNAs were designed to target different regions of the FCoV genome. The siRNAs were tested individually and in various combinations in vitro for their antiviral effects against 2 strains of FCoV (feline infectious peritonitis virus WSU 79-1146 and feline enteric coronavirus WSU 79-1683). Tested combinations targeted the FCoV leader and 3′ untranslated region; FCoV leader region and nucleocapsid gene; and FCoV leader, 3′ untranslated region, and nucleocapsid gene. For each test condition, assessments included relative quantification of the inhibition of intracellular viral genomic RNA synthesis by means of real-time, reverse-transcription Polymerase chain reaction (PCR) analysis; flow cytometric evaluation of the reduction of viral protein expression in infected cells; and assessment of virus replication inhibition via titration of extracellular virus with a 50% tissue culture infective dose (TCID50) assay. The 5 siRNAs had variable inhibitory effects on FCoV when used singly. Combinations of siRNAs that targeted different regions of the viral genome resulted in more effective viral inhibition than did individual siRNAs that targeted a single gene. The tested siRNA combinations resulted in approximately 95% reduction in viral replication (based on virus titration results), compared with findings in negative control non-targeting siRNA-treated FCoV-infected cells. This study shows that FCoV replication can be specifically inhibited by siRNAs that target coding and noncoding regions of the viral genome, suggesting a potential therapeutic application of RNA interference in treatment of feline infectious peritonitis

The Yolk Sac Abnormalities, Maternal Serum Level of Cancer Antigen 125 (CA-125) and Beta Human Chorionic Gonadotropin (B-HCG) as an Early Predictors of First Trimester Pregnancy Loss in Patients with Threatened Miscarriage

Background: Pregnancy loss before 20 weeks is considered a miscarriage, as is the loss of a fetus weighing less than 500 grams before viability. A medical emergency, threatened miscarriage affects 15–25% of pregnancies. Aim and objectives: The goal of this study was to assess the predictive value of maternal blood levels of Cancer Antigen 125 (CA-125) and beta-human chorionic gonadotropin (B- HCG) in individuals at risk of miscarriage during the first trimester. Subjects and methods: This study was a prospective cohort study. This study included 120 pregnant women with threatened abortion between (6-11 weeks) and followed up till end of 14th week. Results: 36(30%) of pregnant women aborted, while 84(70%) of women continued till 14th weeks of pregnancy. At a cut-off value of 45 U/ml, the CA125 test was shown to have a sensitivity of 88.9% and a specificity of 77.5%, respectively, while also having a positive predictive value of 79.8% and a negative predictive value of 87.5%. At a cut-off value of 18.501 mlIU/ml, the B-HCG test's sensitivity and specificity were determined to be 96.3 and 88.9, respectively, with a positive predictive value of 89.7% and a negative predictive value of 96%. Conclusion: Even before fetal morphology can be investigated sonographically, abnormalities in the size of the yolk sac can be utilized as a good prognostic sign of early pregnancy loss. Pregnancy viability can be estimated from first trimester serum CA 125 and Beta HCG measurements

CRIOSPHINX STELA FROM TELL HEBOUA - NORTH SINAI

[En] A rectangular stela was found in the vicinity of Tell Heboua I by accident early 2020. The stela was uncovered 500 m to the west of the fortification walls of Heboua I, during a land reclamation project which is going on at the western vicinity of Tell Heboua I. Our well-trained guard Hassan al-Masody, recognized the limestone slab on top of the embankment of a small drainage canal. When turning this recognizable piece of stone, he found it to be decorated of a limestone stela. Inscribed materials that were discovered at Heboua area are still limited compared to the long history of the site and the extensive and continuous archaeological work done. This obviously due to the scarcity of the stone at this sandy remote area. In addition, every piece of stone in the North Sinai archeological sites was taken from its original place and reused along the history till now. [Ar] لوحه من تل حبوة-شمال سيناء لوحة مستطيلة الشكل عثر عليها مصادفة فى أوائل عام 2020. وذلك على بعد 500 متر إلى الغرب من الجدران المحصنة لمدينة ثارو - حبوة 1 ، واللوحة من الحجر الجيري الابيض تم العثور عليها مكسورة الى قطعتين من المنتصف ، وكانت فى حالة سيئة وتم ترميمها مبدئيا فى الموقع. ظهر اللوحة خشن به العديد من علامات الأزميل المحفورة. تم تزيين اللوحة بنقوش غائرة. تمثل زخرفة اللوحة أحد العناصر الرئيسية التى تشير إلى صورة أسد راقد برأس كبش criosphinx مع حامل قرابين فى المقدمة. يمكن التعرف على الكبش على أنهOvis platyura aegyptiaca بناءً على القرون المنحنية للأمام. كبش بلاتيورا ، المخلوق المقدس البارز لآمون ، أصبح أحد أكثر الحيوانات قداسة فى مصر القديمة من خلال ارتباطه بالإله آمون ، الذي كان ، مثل آمون رع ، الإله البدائى والإله الأعلى للآلهة المصرية ، تاجه يرمز إلى السماء ، ويتكون من تاج يعلوه ريشتان مرتفعتان. لا يوجد نص على اللوحة ؛ يمكن تصنيفها على أنها لوحة نذرية ، وهى لا تحتوى على صورة الشخص الذى وهبها ولكن مثل عليها الاله فقط. ومن المرجح طبقا لما عثر عليه فى منطقة تل حبوة 1 انها تؤرخ بعصر الدولة الحديثة

Effect of Coping Strategies Education on Knowledge and Behaviors of Women Experienced Workplace Bullying

Context: Workplace bullying is defined as the perceived situation in which an employee is systematically and repeatedly the target of work-related or personal harmful acts. Workplace bullying is an occupational stressor shown to have particular detrimental health outcomes for those targeted.Aim: The study aimed to evaluate the effect of coping strategies education on knowledge and behaviors of women who experienced workplace bullying. Methods: A quasi-experimental (pre/posttest) design was used to achieve this study's aim. The study was conducted at Beni-Suef University affiliated to the Ministry of Higher Education. The study was conducted on a convenient sample of 500 women working at Beni- Suef University. They included 360 employee women from different age groups, educational backgrounds, and job positions. The sample also includes 100 nurses and 40 workers. The study used two tools. The researcher designed a structured interview questionnaire to assess the women's socio-demographic profile and their knowledge regarding workplace bullying. The second tool was a coping behavior checklist for workplace bullying designed by the researcher to assess the women's behaviors toward workplace bullying. Results: shows that 36.0% of the studied women were in the age group ≥30 with a mean age of 34.38±4.33. Half of the studied women suffered from all mentioned health effects, followed by absenteeism 15%, then depression 12%, and 7% suffering decreased self-esteem, the least health problems 6% was for a physical problem (cardiovascular, diabetes mellites, and neuromuscular problems). The study reveals a statistically significant improvement of women's knowledge regarding workplace bullying at post compared to pre educational intervention and at follow up phase compared to the post-intervention phase at p <0.001. The results also show a highly statistically significant improvement in the women's behaviors toward workplace bullying between pre and post-intervention phases and between post and follow-up phases of intervention at p <0.001. Conclusion: The research hypotheses were supported. The women exposed to the coping strategies education had improved knowledge and behaviors compared to their pre-education level. Effective organizational interventions are recommended to help prevent and address bullying incidents, and robust legislative mechanisms are also recommended to allow for restitution and compensation, particularly for women

On the applicability of numerical tools for simulating wave-ports close to the cutoff frequency

This paper focuses on a common drawback in electromagnetic numerical computer aided design computer aided design (CAD) tools: high frequency structure simulator (HFSS), computer simulation technology (CST) and FEKO, where the excitation by using a wave-port below and close to the cutoff frequency has unreliable values for the reflection coefficient. An example for such problem is presented in the design of a dual horn antenna fed by two different waveguide sections. To overcome this numerical error in the results of these CAD tools, a tapered waveguide section is used in the simulation as an excitation mechanism to the feeding waveguide. The cross section of the input port at this tapered waveguide section is designed to have a cutoff frequency smaller than the lowest frequency under investigation for the original problem. Then, by extracting the effect of the tapered section from the obtained reflection coefficient, it would be possible to obtain the reflection coefficient of the original problem

A Decade of Experience with Radical Abdominal Trachelectomy after Supracervical Hysterectomy

Background: The supracervical hysterectomy is no longer indicated for the treatment of female genital disease.Patient and Methods: All women who had trachelectomy after supracervical hysterectomy between 2010 and 2020 had their records reviewed at Cairo University's National Cancer Institute (NCI) Hospital.Results: A total of 34 trachelectomy surgeries were performed during a ten-year period. The patients were 42 to 72 years old, with a mean +SD of 55+7.5. Recurrent vaginal bleeding was the reason for trachelectomy in 67.6% of cases due to residual disease found in hysterectomy specimens, with pathologic evidence of uterine malignancy in 47.2%, and 11.7 percent of patients had cervical malignancy. Uterine stromal sarcoma was found in 5.9% of the cases. There were 11.8% of cases with uterine fibroids, 7.8% with endometrial hyperplasia, and 2.9 % with uterine adenomyosis who had true benign lesions. There were no pathology reports available in 8.8% of the cases. The pathology of the trachelectomy revealed that 26.5% of patients had no residual disease, while 73.5% had the residual disease in the cervical stump, with 32.4% having cervical squamous cell carcinoma, 20.6% having uterine adenocarcinoma, 8.8% having cervical adenocarcinoma, and 2.9% having cervical adenosquamous. Mullerian carcinoma was found in 2.9% of the cases, whereas undifferentiated carcinoma was found in 2.9%. In 61.8% of cases, bilateral pelvic lymphadenectomy was coupled with trachelectomy for radical excision of gross malignancy.Conclusions: A significant number of patients who had a subtotal hysterectomy for apparent benign illness required trachelectomy within a few months