An Anti-Cheating System for Online Interviews and Exams

Remote examination and job interviews have gained popularity and become indispensable because of both pandemics and the advantage of remote working circumstances. Most businesses and educational organizations use these platforms for recruitment as well as online exams. However, one of the critical problems of the remote examination systems is conducting the exams in a reliable environment. In this work, we present a cheating analysis pipeline for online interviews and exams. The system only requires a video of the candidate, which is recorded during the exam by using a webcam without a need for any extra tool. Then cheating detection pipeline is employed to detect the presence of another person, electronic device usage, and candidate absence status. The pipeline consists of face detection, face recognition, object detection, and face tracking algorithms. To evaluate the performance of the pipeline we collected a private video dataset. The video dataset includes both cheating activities and clean videos. Ultimately, our pipeline presents an efficient and fast guideline for detecting and analyzing cheating actions in an online interview and exam video

Sıçanlarda Sisplatin ile Oluşturulan Nörotoksisiteye Melatoninin Etkisi

Bayraktar UA. The Effect of Melatonin on Cisplatin Induced Neurotoxicity in Rats. Hacettepe University, Faculty of Medicine, Thesis in Physiology, Ankara, 2021 Cisplatin (Cis) induced neurotoxicity is thought to be caused by oxidative stress and inflammation. Melatonin (Mel) is a well known antiinflamatory and antioxidative drug. We aimed to assess the effects of Mel on Cis induced neurotoxicity in rats. We divided fourty eight rats into six groups as: Control (0.9% NaCl), Vehicle (5% ethanol), Cis (6 mg/kg), Cis (6 mg/kg) + Vehicle (5% ethanol), Mel (20 mg/kg) and Cis (6 mg/kg) + Mel (20 mg/kg). We used Cis as a single dose and Mel for 5 days. After drug injections, we performed T-maze, rotarod and hot plate tests. Rats were sacrificed after behavioral tests and AChE, oxidative stress markers and proinflammatory cytokines were studied from the dissected brain. Cognitive and motor functions were impaired in Cis and Cis+Vehicle groups. Mel repaired cognitive impairment significantly (p<0.05) and motor function insignificantly. While AChE, TBARS and MAO levels were higher in Cis and Cis+Vehicle groups compared to control group (p<0.05), there was a significant decrease in MAO levels but an insignificant decrease in AChE, TBARS levels in Cis+Mel group. SOD and GPx levels were lower in Cis+Vehicle group compared to the control. They increased with the addition of Mel. While GR activity was low in Cis+ Vehicle group, it was higher in Cis + Mel group. TNF- levels were high in Cis and Cis + Vehicle groups, returned to the control group levels with the addition of Mel. IL-6 and IL-1β levels were high in all 3 Cis groups. There wasn’t any change with Mel. These results support that melatonin may be an effective agent in preventing the Cis induced neurotneurotoxicity. However, to reach a definitive conclusion, further studies are required using melatonin in different doses and in different periods.Bayraktar UA. Sıçanlarda Sisplatin ile Oluşturulan Nörotoksisiteye Melatonin Etkisi, Hacettepe Üniversitesi Tıp Fakültesi, Fizyoloji Uzmanlık Tezi, Ankara, 2021. Nörotoksisite sisplatinin (Cis) önemli yan etkilerinden birisidir. Patogenezinde oksidatif stres ve inflamasyon vardır. Melatonin (Mel) iyi bir antioksidan ve antiinflamatuar madde olduğundan bu yan etkiyi düzeltme potansiyeline sahiptir. Bu çalışmanın amacı sıçanlarda Cis’in yaptığı nörotoksisite üzerinde Mel’in etkisini değerlendirmektir. Bu amaçla 48 sıçan 6 gruba bölündü. Kontrol (%0.9 NaCl), Çözücü (%5 etanol), Cis (6 mg/kg), Cis (6 mg/kg) + Çözücü, Mel (20 mg/kg), Cis (6mg/kg) + Mel (20 mg/kg). Cis tek doz, Mel 5 gün süre ile kullanıldı. İlaç protokolü sonrası T-maze, rotarod ve hot plate testleri yapıldı. Davranış testleri sonrası sakrifiye edilen sıçanların beyin dokusunda AChE, oksidatif stres ve proinflamatuar belirteçler ölçüldü. Sonuçlarda Cis ve Cis+Çözücü gruplarda kognitif fonksiyonda ve motor performansta belirgin bozukluk saptanırken Cis+Mel grupta kognitif fonksiyonda belirgin, motor performansta istatistiksel anlamlılığa ulaşmayan düzelme saptandı. AChE seviyeleri Cis verilen sıçanlarda yüksekti. Mel eklenmesi önemli bir değişiklik yapmadı. TBARS ve MAO seviyeleri Cis+Çözücü grupta kontrole göre anlamlı yüksek iken (p<0.05) Cis+Mel grupta MAO seviyelerinde anlamlı, TBARS seviyelerinde anlamlı olmayan düşme oldu. SOD ve GPx seviyeleri Cis+Çözücü grupta kontrole göre anlamlı düşüktü. Mel eklenmesi ile belirgin artış gösterdi. GR aktivitesi Cis+Çözücü grupta düşükken Cis+Mel grupta anlamlı yüksekti. TNF- seviyeleri Cis ve Cis+Çözücü gruplarda yüksek iken Mel eklenmesi ile kontrol grup seviyelerine döndü. IL-6 ve IL-1β seviyeleri 3 Cis grubunda da yüksekti. Mel ile sitokin seviyeleri değişmedi. Sonuçlar Mel’in Cis’in yaptığı nörotoksisiteyi önlemede etkili olabileceğini göstermektedir. Kesin bir sonuca ulaşmak için farklı dozlarda ve farklı sürelerde Mel kullanılarak yapılacak çalışmalara ihtiyaç vardır

Measurement Methods of Service Quality and a Proposal of Methodology for Information Resource of Strategic Management in Higher Education

The purpose of this study is to evaluate comparatively the service quality measurement models and measurement dimensions based on the Servqual Model in higher education and propose a distinctive strategic model. Descriptive analysis method was adopted in the study. The thematic framework is the service quality in higher education. It has been determined that the expected service quality scores are higher than the perceived service quality in all studies under evaluation and a model has been proposed to help strategic management decisions to close the gap. In this context, the difference between students’ expectations of university life and the perceptions of practical education will help to make student-oriented developments in the future of university life and education. Strategic tools that can shape their future decisions are required in order to provide a qualitative transformation in education and different expansions in line with it. The systematic process to be followed within the scope of the study and the method suggested, the evaluation source material that the process creates and the information obtained as a result of the study will contribute to the content that meets these needs

Vision Loss Due to Severe Vitamin A Deficiency After Biliopancreatic Diversion

Background: Depending on the type of nutrient deficiency that occurs after bariatric surgery, almost every component of the optic system can be affected

Colorectal stenting for palliation and as a bridge to surgery: A 5-year follow-up study

AIM: To evaluate the long-term effectiveness of colonic stents in colorectal tumors causing large bowel obstruction

The Publication Rates of Pediatric Rheumatology Abstracts Presented in European League Against Rheumatism 2009 Congress

Objectives: This study aims to evaluate the publication rates and features of the abstracts related to pediatric rheumatology presented in European League Against Rheumatism 2009 congress

Results of Intravitreal Ranibizumab Treatment for Exudative Age-Related Macular Degeneration

Pur po se: To evaluate the efficacy and safety of intravitreal ranibizumab injection for exudative age-related macular degeneration. Ma te ri al and Met hod: In this study, we included forty-eight eyes of 43 age-related macular degeneration patients followed for at least twelve months. Mean age was 73.65±8.93 years and mean follow-up time was 14.2 months. All patients received three consecutive monthly intravitreal ranibizumab injections and then were followed up with clinical examination and optic coherence tomography monthly. Re-injection was executed as needed. Re sults: Twenty patients were male (46.5%) and twenty-three patients were female (53.5%). The average number of ranibizumab injection was 3.7 (3-7) per eye. Twenty-six lesions (54.2%) were classic (predominantly and minimally) and twenty-two (45.8%) were occult. Mean best-corrected visual acuity was 46.8 letters with ETDRS chart at the initial examination and 55.5 letters at twelfth month. Mean central foveal thickness decreased from 320 microns to 269 microns. There was a statistically significant improvement in visual acuity and central foveal thickness. On the other hand, this improvement was not significant between lesion types. During follow-up, there were no systemic or serious ocular complications determined. Dis cus si on: Intravitreal ranibizumab injection is safe and effective, both anatomically and functionally, for age-related macular degeneration. (Turk J Ophthalmol 2012; 42: 25-