X-Capm revisited: the institutional extrapolative capital asset pricing model (I-X-CAPM)

This study constructs and tests a consumption-based asset pricing model in which some investors form beliefs about future price changes in the stock market by extrapolating past price changes, while other investors hold fully rational beliefs. The contribution of the present work is the inclusion of institutional investor bias. As such it extends theory. But it also conducts econometric tests by using daily survey data on individual and institutional investors’ sentiment on the current economic situation and their future expectations. Empirical findings may imply that institutions’ sentiment reverts quicker to the equilibrium price than individual sentiment, at least with regard to their beliefs on future economic outlook. If studied further with a bigger dataset, it may imply that institutional investors are closer to the rational-decision making mechanism compared to individual investors. The theoretical framework rests on prospect theory. The market studied is the US equity market, however findings and suggestions can be applied to global markets and various financial instruments

Hemşirelik öğrencilerinin sağlıklı yaşam biçimi davranışlarının belirlenmesi

This descriptive research was carried out to determine the demographic characteristics that effect of healthy life style behavior of the students at Uludağ University. The study sample included 336 students in School of Health. The healthy life style behavior scale (HLSB-II) was used to measure healthy life style behaviors.          The total scores HLSB scale-II of students (128.97 ±16.40), subscales health responsibility (29.75 ± 4.19), physical activity (16.60 ± 4.24), nutrition (19.40 ± 3.73), spiritual growth (26.93 ± 4.06), interpersonal relationships (26.16 ± 4.25) and stress management (19.44 ± 3.57) were found. The student nurses performed the best in health responsibility but the worst in physical activity. It was also found that girls more than men have a high average in total average. Students' income level is found to influence the ability to deal with the nutrition.          As a result, healthy life style behavior of students was generally found to be medium level in this study. Students should be empowered to make healthy choices, and appropriate health education interventions should be developed.Bu çalışma Uludağ Üniversitesinde okuyan öğrencilerin sağlıklı yaşam biçimi davranışlarını ve etkileyen demografik faktörleri belirlemek amacıyla tanımlayıcı olarak yapılmıştır. Araştırmanın örneklemini Sağlık Yüksekokulunda okuyan 336 öğrenci oluşturmuştur. Öğrencilerin sağlıklı yaşam biçimi davranışlarını belirlemede Sağlıklı Yaşam Biçimi Davranışları Ölçeği-II (HLSB-II) kullanılmıştır.            Öğrencilerin  HLSB-II ölçeği puanları genel toplamda (128.97 ±16.40) ve alt ölçeklerden sağlık sorumluluğu (29.75 ± 4.19), fiziksel aktivite (16.60 ± 4.24),  beslenme (19.40 ± 3.73), manevi gelişim (26.93 ± 4.06), kişilerarası ilişkiler (26.16 ± 4.25) ve stres yönetimi (19.44 ± 3.57) bulunmuştur. Öğrenci hemşireler sağlık sorumluluğundan en yüksek, fiziksel aktiviteden en düşük puanı almıştır. Toplam puanda kızlar erkek öğrencilerden daha yüksek puan ortalamasına sahiptir. Öğrencilerin gelir düzeyinin beslenme davranışını etkilediği tespit edilmiştir.           Sonuç olarak bu çalışmada öğrencilerin sağlıklı yaşam biçimi davranışları puanları orta düzeyde bulunmuştur. Öğrencilerin sağlıklı seçimler yapabilmeleri sağlanmalı, uygun sağlık eğitim girişimleri geliştirilmelidir

COVID-19 infection, vaccine status, and avoidance behaviors in adults with attention deficit and hyperactivity disorder: A cross-sectional study

Objective: We aim to examine infection risk and vaccine status of COVID-19 in attention deficit and hyperactivity disorder and evaluate the impact of demographic, clinical, and COVID-19-related factors on the infection status and behavioral avoidance of COVID-19. Methods: This cross-sectional study assessed adults with attention deficit and hyperactivity disorder recruited from an outpatient psychiatry clinic. Patients and healthy controls completed a survey on sociodemographic data, COVID-19 infection status, and vaccine status. COVID-19 Disease Perception Scale, COVID-19 Avoidance Attitudes Scale, Attitudes toward COVID-19 Vaccine Scale, Adult Attention Deficit and Hyperactivity Disorder Self-report Screening Scale for DSM-5, Adult Attention Deficit and Hyperactivity Disorder Self-Report Scale Symptoms Checklist, Patient Health Questionnaire-9, and State-Trait Anxiety Inventory were applied. Results: Ninety patients and 40 healthy controls participated. Patients did not differ from controls in COVID-19 infection and vaccine status, and behavioral avoidance of COVID-19. No demographic and clinical factor significantly affected the COVID-19 infection status. Patients scored higher than controls in the perception of COVID-19 as contagious (p = 0.038), cognitive avoidance of COVID-19 (p = 0.008), and positive attitudes toward the COVID-19 vaccine (p = 0.024). After adjustment of possible factors, a positive perception of the COVID-19 vaccine and a perception of COVID-19 as dangerous were the two factors significantly affecting behavioral avoidance of COVID-19 [R2 = 0. 17, F(2) = 13.189, p < 0.0001]. Conclusion: Infection and vaccine status of COVID-19 in patients did not significantly differ from controls. No demographic and clinical factor significantly affected the COVID-19 infection status. Approximately four-fifths of the patients were fully vaccinated as recommended by national and global health organizations. This has increased the knowledge base showing that the COVID-19 vaccine is acceptable and receiving the vaccine is endorsed by ADHD patients. Attention deficit and hyperactivity disorder itself may provoke no kind of mental disturbance in sense of perception of the danger of this disease. Our findings have increased the knowledge base showing that the COVID-19 vaccine is acceptable and the actual practice of receiving the vaccine is endorsed in this population. Our message for practice would be to take into account not only the core symptoms and the comorbidities of the disorder but also the perception of the disease while exploring its link with COVID-19

3 ile 5 yıl arasında takibi yapılan dental implant başarısının geriye dönük olarak değerlendirilmesi

Objectives: Dental implant treatment is a common procedure for the rehabilitation of partially or fully edentulous patients.   The aim of this study is to evaluate dental implant success retrospectively. Materials and Methods: 549 dental implants in 168 patients, who were treated between the years 2006 and 2008, were included in this study. The success rate of implant therapy was evaluated considering the site of implant placement, primary stability (PS), bone quality (BQ), one-stage (OS) or two-stage (TS) surgery, and the number of lost implants. Results: 549 dental implants were applied to 168 (72 Male: 96 Female)patients. The mean age was 44. 16,5% of 549 dental implants (n:91) were applied to mandible anterior(MA), 34% (n:187)were applied to mandible posterior(MP), 18,5%(n:102) were applied to maxilla anterior (MaxA) and 30,7% (n:169) were applied to maxilla posterior(MaxP). There were only three lost implants. Two of the lost implants were applied to MP and the other one was applied to MaxP. Conclusions: According to the results of this study, dental implant treatment has a high success rate. ÖZET Amaç: Dental implant uygulamaları tam ve kısmi diş eksikliklerinin tedavisinde sıklıkla uygulanan bir tedavi seçeneğidir. Bu çalışmanın amacı 2006-2008 yılları arasında kliniğimizde uygulanan kemik içi implant uygulamasının başarının geriye dönük olarak değerlendirilmesidir. Gereç ve Yöntem: 2006-2008 yılları arasında Erciyes Üniversitesi Diş Hekimliği Fakültesi Ağız Diş ve Çene Cerrahisi Anabilim Dalına başvuran 168 hastaya 549 adet kemik içi dental implant (Straumann, Bazel, İsviçre) uygulaması yapıldı ve sonuçlar implant uygulanan bölge, primer stabilite (PS), kemik kalitesi (KK), cerrahinin tek aşama (TAC) ve çift aşama(ÇAC)  olması ve kayıp implantlar açısından ayrı ayrı değerlendirildi. Bulgular: Yaş ortalaması 44 olan 168 hastaya (72 Erkek: 96 Bayan ) 549 adet kemik içi dental implant uygulanmıştır. 549 dental implantın %16,5’i (n:91) alt çene anteriora (AÇA), %34’ü (n:187) alt çene posteriora (AÇP), %18,5’i (n:102) üst çene anteriora (ÜÇA) ve %30,7’si (n:169) de üst çene posteriora (ÜÇP) yerleştirilmiştir. Yerleştirilen 549 implantın 3 tanesinde kayıp yaşanmıştır. Kayıp implantların iki tanesi AÇP’ ye, bir tanesi ÜÇP’ ye yerleştirilmiştir. Sonuç: Bu çalışmanın sonuçlarına göre dental implant tedavisi, başarı oranı yüksek bir tedavi seçeneğidir. Anahtar Kelimeler: Dental implant, retrospektif

Diş hekimliği fakültelerinde kullanılan farklı diş ünitlerinin su ünitlerinin su sistemlerinin geri akım kontaminasyonu açısından değerlendirilmesi

Amaç: Farklı diş koltuk sistemlerine bağlı gerikaçış engelleyici sistemlerin etkinliğinin uzun dönem araştırılması ve farklı branşlara göre gerikaçış sonucu ortaya çıkabilecek çapraz enfeksiyon riskinin belirlenmesidir. Gereç ve Yöntemler: Dişhekimliğinin birbirinden farklı üç branşından çalışma grubu oluşturulmuştur. Bu farklı üç gruptan elde edilen materyaller bakteri varlığı açısından değerlendirilerek gruplar arasındaki farklılık mikrobiyolojik açıdan incelenmiştir. Bulgular: Üç grupta da birçok bakteri kolonisinin izole edildiği görülmekle birlikte üreyen mikroorganizmaların çoğunun çevreden ve ağız florasından sıklıkla izole edilen bakteri kolonileri olduğu görülmüştür. Sonuç: Diş ünit sistemlerinin kontaminasyonu engelleyici sistemlerle donatılmasının son derece önemli olduğu görülmüş, bununla birlikte uzun zamandır kullanılan diş ünit sistemlerinin sıklıkla kontrol edilmesi ve gerektiğinde yenilenmesi sonucuna ulaşılmıştır

Anxiety levels of healthcare personnel in different stages of COVID-19 pandemic: A nationwide study from Turkey

Aim: SARS CoV-2 transmission in healthcare personnel was first reported on January 20, 2020. The aim of this study was to evaluate the anxiety levels experienced by healthcare personnel in Turkey during the COVID-19 pandemic and the factors affecting these levels.Material and Methods: A survey investigating sociodemographic features and examining anxiety levels was conducted among approximately 1000 healthcare personnel who were expected to take active roles in the pandemic across Turkey. The survey was conducted in three stages: before the pandemic spread to Turkey, at the beginning of the pandemic and when the pandemic became prominent. A logistic regression analysis was performed to determine the factors affecting anxiety and predictors of anxiety levels.Results: In the first survey, always (odds ratio, 15.781; p<0.01) and often (odds ratio, 5.365; p<0.05) media use, in the second survey media use (p<0.05) and profession (odds ratio, 0.021; p<0.05) and in the third survey, marital status (odds ratio, 17.716; p<0.01) and gender (odds ratio, 4.431; p<0.05) were determined as the predictors of anxiety related to COVID-19.Discussion: As a result of this study, healthcare personnel groups were defined (women, nurses, married people) who need special intervention and support to provide spiritual comfort when working on the front line in the fight against COVID-19. Further comprehensive studies are needed of the extent of psychological support required by healthcare personnel and to whom and how this support should be provided

A Rare Dermatologic Reaction in an Adult Patient Following Coronary Angiography: Acute Generalized Exanthematous Pustulosis

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Prediction model for hardened state properties of silica fume and fly ash based seawater concrete incorporating silicomanganese slag

Growing concrete consumption has gradually depleted conventional resources. This research incorporates silicomanganese (SiMn) slag, marine sand and seawater as alternative concreting materials. The use of SiMn slag to replace limestone as coarse aggregate enhances sustainability, though reducing strength and durability of concrete. This research aims to enhance the SiMn slag concrete by incorporating silica fume (SF) and fly ash (FA). The interaction of SF and FA on strength, durability and workability of concrete is investigated by statistically evaluating the experimental result. In this regard, the polynomial function prediction model is developed using the Response Surface Method (RSM) for the optimization of SF and FA contents. Analysis of variance (ANOVA) using p-value at significance level of 0.05 showed that the models were statistically significant and had marginal residual errors. All models had high fitness with R2 value ranging from 0.853 to 0.999. Adequate precision of models was above 4, indicating that the models had a low prediction error and were fit for optimization. Optimization indicated that a combination of 11.5% SF and 16.3% FA produced concrete that met the optimization criteria. Experimental validation showed that the highest prediction error was 3.4% for compressive strength, 3.2% for tensile strength, 4.9% for sorptivity and 18% for chloride permeability. The optimized concrete exhibited compact microstructure with good bonding between aggregate and cement paste. By using the established linear equation with SiMn slag concrete, the models also predicted the compressive strength of limestone concrete containing SF and FA with an error of between 0.9% and 5.4%

Ekonomik öncü göstergelerinin BES katılımcı sayısı üzerindeki etkisi

Ekonomik öncü göstergelerinin Bireysel Emeklilik Sistemi (BES) katılımcı sayısı üzerindeki etkisi sayıma dayalı olan yöntemler ile araştırılmıştır. Geçinme endeksinde bulunan tüm değişkenler ile katılımcı sayısı arasında pozitif bir ilişki bulunmuştur. Harcamalar, BES katılımcı sayısı üzerinde pozitif bir etkiye sahipken, katılımcı sayısı tasarruflar ele alındığında düşmektedir. Dayanıksız mallar ve hizmetler için yapılan harcamalar katılımcı sayısı üzerinde büyük bir etkiye sahiptirler. Enflasyon ve BES katılımcı sayısı arasında anlamlı bir ilişki bulunmaktadır. BES katılımı ile ilgili ileriye yönelik projeksiyonlarda, devlet katkı payının ve toplumdaki BES’e ilişkin bilinçlenmenin etkileri analize dahil edilmelidir.This study analyzes the effects of leading economic indicators on the contributor number to the private pension system (BES) based on count model approaches. A positive correlation is found between the number of contributors and all living index variables. A positive effect of expenses on the contributor numbers is observed, while considering saving, the number of participants is reduced. For nondurable goods and services, spending has a large impact on the number of participants. There is a significant relationship between the number of BES contributors and inflation. In BES participation related forward-looking projections, the State contribution and the impact of awareness in the society about BES should be included into the analysis