Adaptive thread and memory access schelduling in chip multiprocessors

Ankara : The Department of Computer Engineering and the Graduate School of Engineering and Science of Bilkent University, 2013.Thesis (Master's) -- Bilkent University, 2013.Includes bibliographical references leaves 76-81.The full potential of chip multiprocessors remains unexploited due to architecture oblivious thread schedulers used in operating systems, and thread-oblivious memory access schedulers used in off-chip main memory controllers. For the thread scheduling, we introduce an adaptive cache-hierarchy-aware scheduler that tries to schedule threads in a way that inter-thread contention is minimized. A novel multi-metric scoring scheme is used that specifies the L1 cache access characteristics of a thread. The scheduling decisions are made based on multi-metric scores of threads. For the memory access scheduling, we introduce an adaptive compute-phase prediction and thread prioritization scheme that efficiently categorize threads based on execution characteristics and provides fine-grained prioritization that allows to differentiate threads and prioritize their memory access requests accordingly.Aktürk, İsmailM.S

ÖĞRETMEN ADAYLARININ OKUL UYGULAMALARINDAN DOYUMLARINI YORDAYICI FAKTÖRLER

Bu araştırmada, Selçuk Üniversitesi Eğitim Fakültesi Ortaöğretim Bölümlerinde okumakta olan 286 son sınıf öğrencilerinin okul uygulamalarıile ilgili doyumlarınıyordayıcıfaktörler incelenmiştir. Veri toplama aracıolarak Aksu ve Demirtaş 2006 tarafından geliştirilen anket formu kullanılmıştır. Bu ankete öğretmen adaylarının okul uygulamalarından doyumlarınıve okul uygulamalarındaki teknoloji kullanımınıölçen iki tane bölüm eklenmiştir. Ayrıca çalışma grubunun profilini çıkarmak amacıyla öğretmen adaylarının anabilim dalı, cinsiyeti, öğretim tekniği, bilgisayar ve internet sahipliği sorulmuştur. Bu çalışmada, uygulama okul ortamı, müdürü, öğretmeni, öğretim elemanı, öğretmen adayı, öğretmen adayıdoyumu ve teknoloji kullanımının hepsinin birbiri ile istatistiksel olarak anlamlıdüzeyde ilişkili olduğu görülmüştür. Öğretmen adaylarının okul uygulamalarından doyumlarınıyordama da; uygulama öğretmeni, öğretim elemanı, okul müdürü ve teknoloji kullanımının istatistiksel olarak anlamlıdüzeyde önemli faktörler olduğu tespit edilmiştir

The association between non-HDL cholesterol and SYNTAX score in premature heart disease

Aim: This study aimed to estimate the association of coronary artery disease complexity with non-HDL-C levels in premature CAD. Background: Primary prevention has utmost importance in terms of minimizing the number of patients who had premature coronary artery disease (CAD). Non-high density lipoprotein cholesterol (non-HDL-C) contains potentially atherogenic lipoprotein fractions. Material and methods: Coronary angiographic recordings of two hundred acute coronary syndrome patients were evaluated by two cardiologists. Clinical, demographic and lipid parameters of the patients were compared with SYNTAX score. Results: Median age of the study group was 41 (18-45) years. One hundred eighty five (90.5%) of them were male, nineteen (9.5%) of them were female. Median SYNTAX score and ejection fraction of the patients were 17 (4.5-39) and 50 (33-68), respectively. SYNTAX score of the male patients was significantly higher compared to females [17 (4.5-39) vs 12 (8-26), p=0.048), similarly, diabetic patients had higher values of syntax score compared to non-diabetic patients [19 (10-39) vs 16 (4.5-37), p=0.005), There were no differences of SYNTAX score with respect to presence of hypertension, smoking status and family history of CAD.  There were very strong positive correlation between SYNTAX score and non-HDL-C, TC and LDL-C levels (r=0.958, r=0.946 and r=0.921, respectively, p<0.001 for all).   HgA1c levels showed positive correlation, whereas HDL-C showed negative correlation with SYNTAX score (r=0.793 and r=-0.620, respectively, p<0.001 for both). Conclusion: non-HDL-C was a valuable tool in assessing the complexity of atherosclerotic cardiovascular disease in young patients