Para politikasi soklari ve hisse senedi getirileri iliskisi

In terms of the monetary transmission mechanism, one of the canals of influence of the monetary policy on the economy is the stock market. Determining the relationship between monetary policy actions and stock market is important in terms of the monetary transmission actions. The purpose of this study is to investigate the effect of monetary policy shocks as a basic economic shocks on stock markets. In the study, predicting Dynamic Stochastic General Equilibrium model was carried out within framework of Bayesian Approach. The relationship between monetary policy shocks and stock market was investigated by causality analysis. Obtained findings indicate that there is bilateral relation between monetary policy shocks and stock returns.peer-reviewe

Türk Halk Dindarlığının Diyanet Medyasına Yansımaları

Günümüzde medya bir taraftan bireylerin ve toplumun duygu, düşünce, tutum ve inançlarını değiştirmeyi ve yönlendirmeyi sağlayan güçlü bir araçken diğer taraftan dini bilgilerin aktarılmasında, öğrenilmesinde ve dini sosyalleşmenin gerçekleşmesinde işlevsel olarak kullanılmaktadır. Bu çalışmanın konusu, Diyanet medyasına yöneltilen dini soruların incelenerek Türk halk dindarlığının ortaya konulmasıdır. Çalışma bu çerçevede Diyanet Televizyonu’nda yayınlanan Diyanete Soralım programına soru yönelten katılımcıların din anlayışlarını, dine dair zihinlerindeki problemleri ve dindarlık tutumlarını ortaya koymayı amaçlamaktadır. Çalışma nitel araştırma yöntemleriyle yürütülmüş ve nitel içerik çözümlemesi yapılmıştır. Araştırma Diyanete Soralım programının 2017-2018 yılı iki yayın döneminde yer alan yüz elli bölüm içerisinden seçilen elli programlık örneklemi kapsamaktadır. Sonuçta sorular üzerinden dinin toplumsal alanda nasıl yaşandığı, katılımcıların dinle bağlantılı olarak sergiledikleri tutumlar ve Türk halk dindarlığı ele alınmıştır

Einbau unnatürlicher Aminosäuren in Proteine zur bioorthogonalen Modifizierung sowie Untersuchung des Dewar-Reparaturmechanismus durch (6-4) Photolyasen

Der in vivo Einbau unnatürlicher Aminosäuren mit besonderer Reaktivität an definierten Positionen in Proteine ist die Methode der Wahl, um Proteineigenschaften zu ändern oder diese mit gewünschten Funktionen auszustatten. In dieser Arbeit wurde das Pyrrolysin-System aus Methanosarcina mazei in E. coli angewendet, um den Einbau reaktiver Pyrrolysin-Analoga in Proteine und deren bioorthogonale Modifizierung zu erlauben. Zum Einen wurde ein Alkin-Analogon mehrfach in YFP eingebracht und mit unterschiedlichen Zucker-Aziden ortsgerichtet glykosyliert. Zum Anderen wurde mittels gerichteter Evolution des Pyrrolysin-Systems der Einbau eines Norbornen-Analogons in Proteine ermöglicht. Dieses konnte im Anschluss selektiv und unter sehr milden Reaktionsbedingungen mit Fluorophoren und PEG-Ketten adressiert werden

Computational and Perceptual Characterization of Auditory Attention

Humans are remarkably capable at making sense of a busy acoustic environment in real-time, despite the constant cacophony of sounds reaching our ears. Attention is a key component of the system that parses sensory input, allocating limited neural resources to elements with highest informational value to drive cognition and behavior. The focus of this thesis is the perceptual, neural, and computational characterization of auditory attention. Pioneering studies exploring human attention to natural scenes came from the visual domain, spawning a number of hypotheses on how attention operates among the visual pathway, as well as a considerable amount of computational work that attempt to model human perception. Comparatively, our understanding of auditory attention is yet very elementary, particularly pertaining to attention automatically drawn to salient sounds in the environment, such as a loud explosion. In this work, we explore how human perception is affected by the saliency of sound, characterized across a variety of acoustic features, such as pitch, loudness, and timbre. Insight from psychoacoustical data is complemented with neural measures of attention recorded directly from the brain using electroencephalography (EEG). A computational model of attention is presented, tracking the statistical regularities of incoming sound among a high-dimensional feature space to build predictions of future feature values. The model determines salient time points that will attract attention by comparing its predictions to the observed sound features. The high degree of agreement between the model and human experimental data suggests predictive coding as a potential mechanism of attention in the auditory pathway. We investigate different modes of volitional attention to natural acoustic scenes with a "cocktail-party" simulation. We argue that the auditory system can direct attention in at least three unique ways (globally, based on features, and based on objects) and that perception can be altered depending on how attention is deployed. Further, we illustrate how the saliency of sound affects the various modes of attention. The results of this work improve our understanding of auditory attention, highlighting the temporally evolving nature of sound as a significant distinction between audition and vision, with a focus on using natural scenes that engage the full capability of human attention

THE RELATIONSHIP BETWEEN WORKING CAPITAL AND FIRM PERFORMANCE: A HETEROGENEOUS PANEL APPLICATION

This paper seeks to determine the working capital efficiency levels of firms in the manufacturing sector in Turkey and the impact of working capital efficiency on their profitability. To this end, a panel data analysis was conducted using quarterly data for the 2009-2018 period. The findings indicate that the working capital efficiency index has a positive impact on firm profitability and that the cash conversion cycle has no impact on firm profitability

In vitro fertilization pregnancy may cause fetal thymic volume involution: A case-control study

Background: The effect of modern infertility treatment modalities on fetal thymic volume has not been well known. Objective: 3-dimensional (3D) fetal thymus volumes of 18-24 wk in vitro fertilization (IVF) pregnancies and spontaneous pregnancy cases were compared. Materials and Methods: 135 cases were evaluated in this prospective case-control study. The study was conducted between July 2019 and July 2020 at a university hospital in Trabzon, Turkey. Fetal thymus volume was calculated in the pregnant cases included in the study with the help of the virtual organ computer-assisted analysis system included in the advanced ultrasonography system. The fetal thymus volumes were compared between pregnant women with IVF and spontaneous pregnant women. Results: The fetal thymus size was significantly lower in the IVF pregnancy group than in spontaneous pregnancy cases (p < 0.001). It was found that the fetal complications, such as non-reassuring fetal health status and requirement for neonatal intensive care, were higher in cases who became pregnant after IVF treatment. It was also found that the rate of any pregnancy complication was significantly higher in IVF pregnancy c group (p = 0.02). Conclusion: In light of these results, it may be concluded that small fetal thymus size may be another fetal complication of IVF pregnancies. Key words: Fetus, Fertilization in vitro, Prenatal ultrasonography, Thymus

COVID-19 Pandemic: A comparison of adult and pediatric populations

Aim:  Couple of pneumonia cases were reported in a short period in Wuhan, China. The cases were revealed to be associated with a different coronavirus type was named SARS-CoV-2 and the disease was identified as Covid-19.  It is known that the disease occurs in all age groups. We aimed to evaluate the differences in clinical and laboratory features between adult and pediatric patients. Method: The study is a retrospective cross-sectional study and consists of 206 patients with a definitive diagnosis of Covid-19 confirmed by a positive real-time reverse-transcriptase polymerase chain reaction (RT-PCR) testing for SARS-CoV-2. They hospitalized in health institutions connected to City Health Administrative of Bolu, Turkey between 11.03.2020 and 19.04.2020. The number of the pediatric patients (0-17 age group) was 106, that of the adult patients (18 and above age group) was 100. Data concerning the patients consisted of age, symptoms, laboratory parameters such as hemogram, biochemistry, coagulation. Results: The mean values of platelet (PLT), platocrit (PCT), percentage of monocytes (MONO %) and MONO in the “0-17” age group were found to be significantly higher than the mean values in the “18 and above” age group. The hemoglobin (HGB) mean value of the “0-17” age group was significantly lower than that of the “18 and above” age group. The mean C - reactive protein (CRP) value of the “0-17” age group (4.55; min: 1.20 – max: 11.80) was significantly lower than that of the “18 and above” age group (5.35; min 1.25- max: 19.77) with no statistically significance. In pediatric group, the most common symptoms were other symptoms like diarrhea, vomiting and joint pain whereas the adult patients had fever and cough often with statistically significant. Conclusion: Clinical findings and laboratory abnormalities in Covid-19 are less common in children. Although it seems that Covid-19 is less symptomatic in children, they are also affected by the disease. Performing RT-PCR test based on the contact history of the children may help to minimize morbidity with an early diagnosis. Multicenter studies with more numbers of patients should be performed

An interaction of foreign exchange market stress and security markets: An investigation on BIST 100

The purpose of this study is to determine relationship between foreign exchange market stress and security markets for Turkey. Within this scope, firstly for December 2005-November 2017 time period, foreign exchange market stress index was calculated. This calculated stress index, has been successful in predicting years in which crisis broke out during research period, changes came with important events, and demand and policy differences emerged. As for the relation between foreign exchange market stress index and stock markets, VAR model was set up and Granger causality analysis was carried out. According to Granger causality analysis results, it was determined that there is unilateral causality relations from stock market to foreign exchange market. This causality relation from stock market to foreign exchange market indicates that portfolio balance approach is valid for research period for Turkey.Bu çalışmanın amacı, döviz piyasası baskısı ve menkul kıymet piyasaları arasındaki ilişkiyi Türkiye için tespit etmektir. Bu kapsamda, ilk olarak Aralık 2005–Kasım 2017 dönemi için döviz piyasası baskı endeksi hesaplanmıştır. Hesaplanan bu baskı endeksi, inceleme döneminde meydana gelen krizlerin, önemli olaylarla gelen değişimlerin, talep ve politika farklılıklarının ortaya çıktığı yılları tahmin etmede başarılı olmuştur. Döviz piyasası baskı endeksi ve hisse senedi piyasaları arasındaki ilişki için ise, VAR modeli kurulmuş ve Granger nedensellik analizi gerçekleştirilmiştir. Granger nedensellik analizi sonuçlarına göre, hisse senedi piyasasından döviz piyasası baskı endeksine doğru tek taraflı nedensellik ilişkisi olduğu belirlenmiştir. Hisse senedi piyasasından döviz piyasasına olan bu nedensellik ilişkisi, inceleme dönemi için portföy dengesi yaklaşımının Türkiye için geçerli olduğuna işaret etmektedir