Examining the dynamics of macroeconomic indicators and banking stock returns with bayesian networks

According to the modern portfolio theory, the direction of the relationship between the securities in the portfolio is stated to be effective in reducing the risk. Moreover, securities in high correlation are avoided by taking place in the same portfolio. The models structured by the Bayesian networks are capable of visually illustrate the probabilistic relationship. Also, portfolio returns could be refreshed simultaneously when new information has arrived. The study aims to provide dynamic information through Bayesian networks and to investigate the relationship between macroeconomic indicators and stock returns of Turkish major bank stocks based on the Arbitrage Pricing Model. The dataset includes stock returns of four banks listed in the Borsa Istanbul from June 2001 to January 2017. Besides, macroeconomic variables such as BIST-100 Index, oil prices, inflation, exchange, and interest rate & money supply are gathered for the same period. The results suggest that the Bayesian network models allow dynamics among stock returns could be investigated in more detail. Additionally, it determines that macroeconomic variables would have various impacts on stock returns on bank stocks by comparison of the conventional methods

The role and importance of librarians in the service quality of enriched libraries

Libraries are among the prominent elements of educational content in schools. School libraries in Turkey contributed per se to this notion until 2014. The Ministry of National Education has been carrying out the project “Okullar Hayat Olsun” since then, which led to the establishment of enriched libraries and being a partner of said contribution. Enriched libraries with their modern design, technological equipment, games, activities and recreational areas aim to provide services across Turkey by considering equality of opportunity in education as per contemporary educational standards. Enriched libraries also need professionally trained librarians to serve their intended framework. The employment of librarians, which is also valid for school libraries, is indispensable for enriched libraries. A library cannot be expected to provide quality services, unless there is a librarian, who received professional training in the field, regardless of the type of library. To that end, this study discusses the role and significance of librarians in the service

The examine of dynamic interrelation of stock returns: Bayesian network models

Modern portföy teorisinde, portföyde yer alan menkul kıymetler arasındaki ilişkinin yönünün ve derecesinin riskin azaltılması yönünde etkili olduğu belirtilmektedir (Markowitz, 1952). Teoride, birbirleriyle yüksek korelasyon içinde bulunan menkul kıymetlerin aynı portföyde yer almasından kaçınılmaktadır. Ancak korelasyon katsayısı, iki rassal değişken arasındaki doğrusal ilişkinin yönünü ve gücünü belirtmektedir. Bayes ağlar kullanılarak oluşturulan modeller menkul kıymetler arasındaki olasılıksal ilişkiyi görsel olarak sunabilmekte ve yeni bilgi geldiğinde ağda yer alan menkul kıymet getiri değerleri eşzamanlı olarak güncellenebilmektedir. Çalışmanın amacı, 2011-2016 dönemleri arasında Borsa İstanbul Ulusal-100 (BIST-100) endeksinde kesintisiz faaliyet gösteren hisse senetlerine ait getirilerin birbirleri ile olan ilişkilerini bir makine öğrenmesi olan Bayes ağ modelleri kullanarak araştırmaktır. Çalışmada Bayes ağ modelleri kullanılarak elde edilecek detaylı ilişkiler ile yatırımcıların portföy seçimlerinde kullanabilecekleri nitel ve nicel bilgiler yer almaktadır

An examınatıon of Malcolm Arnold’s musıcal language and op.88 Fantasy for Horn and practıce methods

20. yüzyılın en tanınmış İngiliz bestecilerinden biri olan Malcolm Arnold (1921- 2006), senfoni, bale, opera, konçerto ve film müziği gibi çeşitli türlerde birçok eser bestelemiştir. İlgi çekici müziğinin ardında karmaşık bir kişilik vardır. Birçok eserinde, komedi ve trajedi, coşku ve çaresizlik gibi zıt duyguları bir arada kullanmıştır. Duygusal hayatında yaşadığı gelgitleri fazlasıyla müziğine yansıtan Arnold’un, 1966 yılında bestelemiş olduğu Op.88 Fantasy for Horn adlı eseri solo korno repertuvarında oldukça önemli bir yere sahiptir. Bu çalışmada, özellikle 20. yüzyılın ikinci yarısında İngiltere’de önemli bir yere sahip olan Malcolm Arnold’un, yaşamı ve besteci kimliği hakkında bilgi verilmiştir. Ayrıca korno icracıları tarafından sıkça seslendirilen Op. 88 Fantasy for Horn eseri, müzikal ve teknik detaylarıyla incelenmiştir. Bu çalışmanın korno icracılarına teknik ve müzikal açıdan yol göstermesi amaçlanmıştır.Malcolm Arnold (1921-2006), one of the famous 20th-century British composers, was composed many works in a variety of genres such as symphony, ballet, opera, concerto, and movie music. A complex personality underlies his engaging music. In many of his works, he was blended contrasting emotions such as comedy and tragedy, enthusiasm and desperation. Arnold reflected his hesitations in his emotional life into his music too much and his work entitled Op.88 Fantasy for Horn that he composed in 1966 has a very important place in the horn solo repertoire. This study provides information about the life and composer personality of Malcolm Arnold, who had occupied a unique position in Britain especially in the second half of the 20th century. Also, his work entitled Op.88 Fantasy for Horn, which was frequently performed by horn players, was musically and technically analyzed. This paper aims to guide horn players both musically and technically

Determining Teachers’ Educational Needs Regarding School Education Projects within the Scope of Erasmus + Programme

The purpose of this study was to determine teachers’ educational needs regarding school education projects within the scope of Erasmus+ programme. In the study, the case study method, one of qualitative research designs, was used. The participants were determined using the snowball sampling method, and eight secondary school teachers took part in the study. The research data were collected via semi-structured interviews and analyzed using the inductive analysis method. The results of the analysis revealed that the teachers had certain knowledge about the processes of planning, implementation and evaluation of the projects and that they did not acquire the necessary related skills at all, though. It was also found that the group work process and lack of related knowledge, skills and experience were among the factors making the functioning of the process difficult and that professional development was not fully achieved. All these results demonstrate that teachers are need of an in-service training which focuses more on the steps of the application process and on the integration of the objectives of the process into the curriculum and which aims to help acquire the related skills considering the functioning of the process as a whole

Öğretim Elemanlarının Öğretim Yeterliklerini Değerlendirme Ölçeği (Öydö): Geçerlik ve Güvenirlik Çalışması

DergiPark: 694869tredBu araştırmanın amacı, öğretim elemanlarının öğretim yeterliklerinin öğrenci görüşleri doğrultusunda değerlendirilmesinde kullanılabilecek geçerli ve güvenilir bir ölçme aracının geliştirilmesidir. Araştırmaya 1237 yükseköğretim öğrencisi katılmıştır. Verilerin analizinde Cronbach Alpha analizi, korelasyon analizi, açımlayıcı ve doğrulayıcı faktör analizi kullanılmıştır. Analizler sonucunda, dört boyutta toplanan 38 maddelik Likert tipi bir ölçme aracına ulaşılmıştır. Toplam varyansın %50.90’nını açıklayan bu ölçme aracının Cronbach Alpha iç tutarlılık katsayısı .95’dir. “Öğretime hazırlık” “etkili sunum”, “öğrenci merkezli öğretim ve değerlendirme”, “sınıf içi ve sınıf dışı iletişim” boyutlarının Cronbach Alpha iç tutarlılık katsayıları ise sırasıyla .86, .76, .91 ve .91 olarak hesaplanmıştır. Analiz sonuçlarına dayalı olarak Öğretim Elemanlarının Öğretim Yeterliklerini Değerlendirme Ölçeği’nin öğretim yeterliklerinin değerlendirilmesinde kullanılacak geçerli ve güvenilir bir araç olduğu belirlenmiştir

Label reading habits and views on genetically modified organisms of adults during food shoppingErişkinlerin gıda alışverişi sırasında etiket okuma alışkanlıkları ve genetiği değiştirilmiş organizmalar konusundaki görüşleri

Food label makes it possible to use the rights training, access to information, selection for consumer. It is possible to eat healthy by having more information on food labels. This study was planned to determine food label reading habit and the views on GMOs of adults. The population of the research consists of adults who shpping at supermarket in Manisa. The sample was 658 people (n=658). The descriptive and cross-sectional survey was done October between and December 2014. The data collection form includes socio-demographic information, opinions on label reading and GMOs. It was found that 80.1% of respondents' source of information on GMOs is the media.It was found that socio-demographical characteristics of the participants affected food labels reading habits and views on GMOs. It was found that most of respondents that disagreed in production with genetically modified seeds in Turkey is correct. Furthermore most of respondents thought that did not comply with the ban which prevents entry of genetically modified foods to Turkey and did not make necessary checks in there. The results of this study show that adults are not having much knowledge about GMOs and risk perseption scale on GMOs is great. the media has the bigggest effect about GMOs. This study once again showed the need for the educational role of the public health nurse in terms of community nutrition. Extended English abstract is in the end of PDF (TURKISH) file.ÖzetGıda etiketi tüketicinin bilgi edinme, eğitilme, seçme hakkını kullanmasını mümkün kılar. Gıda etiketleri hakkında daha fazla bilgiye sahip olarak sağlıklı beslenmek mümkündür. Çalışma erişkinlerin gıda etiketi okuma alışkanlığı ve GDO konusundaki görüşlerinin belirlenmesi amacıyla planlanmıştır. Araştırmanın evrenini Manisa il merkezinde bulunan süpermarketlerden alışveriş yapan erişkinler oluşturmuştur. Örneklem ise 568 kişidir (n=658). Tanımlayıcı-kesitsel tipteki çalışmanın verileri Ekim-Aralık 2014 tarihleri arasında toplanmıştır. Veriler GDO’ ya ilişkin soruların olduğu form ve sosyo-demografik bilgi formu kullanılarak toplanmıştır. GDO’ ya ilişkin bilgiye ulaşmada en sık kullanılan kaynak medyadır (%80.1).Katılımcıların sosyo-demografik özelliklerinin   etiket okuma alışkanlığı ve GDO’ ya ilişkin görüşlerini etkilediği bulunmuştur. Katılımcıların çoğu Türkiye’de GD tohumlarla üretim yapılmasını doğru bulmadığını, Türkiye’de GDO’ lu gıda girişini engelleyen yasağa uyulmadığını ve gerekli kontrollerin yapılmadığını düşünmektedir. Çalışma sonuçlarına göre erişkinler GDO hakkında pek fazla bilgi sahibi değildir ve medya en büyük etkiye sahiptir. Katılımcıların GDO risk algısı yüksektir. Bu çalışma toplum beslenmesi açısından halk sağlığı hemşiresinin eğitici rolüne olan ihtiyacı bir kez daha gözler önüne sermiştir

A Brain Phenotype for Stressor‐Evoked Blood Pressure Reactivity

Background Individuals who exhibit large‐magnitude blood pressure (BP) reactions to acute psychological stressors are at risk for hypertension and premature death by cardiovascular disease. This study tested whether a multivariate pattern of stressor‐evoked brain activity could reliably predict individual differences in BP reactivity, providing novel evidence for a candidate neurophysiological source of stress‐related cardiovascular risk. Methods and Results Community‐dwelling adults (N=310; 30–51 years; 153 women) underwent functional magnetic resonance imaging with concurrent BP monitoring while completing a standardized battery of stressor tasks. Across individuals, the battery evoked an increase systolic and diastolic BP relative to a nonstressor baseline period (M ∆systolic BP/∆diastolic BP=4.3/1.9 mm Hg [95% confidence interval=3.7–5.0/1.4–2.3 mm Hg]). Using cross‐validation and machine learning approaches, including dimensionality reduction and linear shrinkage models, a multivariate pattern of stressor‐evoked functional magnetic resonance imaging activity was identified in a training subsample (N=206). This multivariate pattern reliably predicted both systolic BP (r=0.32; P<0.005) and diastolic BP (r=0.25; P<0.01) reactivity in an independent subsample used for testing and replication (N=104). Brain areas encompassed by the pattern that were strongly predictive included those implicated in psychological stressor processing and cardiovascular responding through autonomic pathways, including the medial prefrontal cortex, anterior cingulate cortex, and insula. Conclusions A novel multivariate pattern of stressor‐evoked brain activity may comprise a phenotype that partly accounts for individual differences in BP reactivity, a stress‐related cardiovascular risk factor

Physical activity is associated with reduced Implicit learning but enhanced relational memory and executive functioning in young adults

Accumulating evidence suggests that physical activity improves explicit memory and executive cognitive functioning at the extreme ends of the lifespan (i.e., in older adults and children). However, it is unknown whether these associations hold for younger adults who are considered to be in their cognitive prime, or for implicit cognitive functions that do not depend on motor sequencing. Here we report the results of a study in which we examine the relationship between objectively measured physical activity and (1) explicit relational memory, (2) executive control, and (3) implicit probabilistic sequence learning in a sample of healthy, college-aged adults. The main finding was that physical activity was positively associated with explicit relational memory and executive control (replicating previous research), but negatively associated with implicit learning, particularly in females. These results raise the intriguing possibility that physical activity upregulates some cognitive processes, but downregulates others. Possible implications of this pattern of results for physical health and health habits are discussed