EFFECTS OF ATHLETE PERSONALITY ON VARIABLES RELATED TO TENNIS INJURIES

This research aims to investigate how tennis players' personality structures affect some variables related to the injuries they experience in sports. The research population consists of tennis players between the ages of 10-18 in Turkey. A total of 158 (female: 87, male: 71) tennis players between the ages of 10-18 who had at least one tennis-specific injury participated in the study. Demographic questions (gender, age, height, weight, time of sports injury, repetition of the same injury, and injury measure) used in the study were created by the researchers. The personality of the athlete was determined by the athlete himself, and the survey questions were determined by using the survey questions used in Kirişci's (2011) study. Data from tennis players were collected online via 'Google Form'. There is a low level of statistically positive correlation between re-experiencing the sports injury and the time of the sports injury (r=0.18, p=0.03). There is a low level of statistically positive correlation between the gender of the participants and taking precautions for sports injury (r=0.20, p=0.01). There is a low negative correlation between the gender of the participants and their athlete personality (r=26, p=0.001). There is no statistically significant difference between the participants' re-experiencing the same injury, taking precautions in sports injury, and athlete's personality (r=-0.013, p=0.87, r=0.010, p=0.90). It can be said that the sports injuries experienced by tennis players are related to their personality types and their gender. It can be said that injuries seen in tennis sports are more common during matches and women take more precautions for sports injuries than male athletes. In addition, it can be said that female athletes have both courageous-attentive and emotional-calm personality types, while males have the most courageous-active personality type.  Article visualizations

The Role of Monetary Policy Announcements on Turkish Banks' Stock Returns

This paper investigates the impact of monetary policy committee decisions of the Central Bank of the Republic of Turkey on the stock returns of the deposit banks listed in Borsa Istanbul Banks Index (XBANK). The cumulative abnormal returns of the banks are calculated for 2008 and 2012. We report that the monetary policy announcements affect cumulative abnormal returns of the deposits banks both in 2008 and 2012. Since the announcement of the monetary policy decisions created abnormal returns, we conclude that the market does not have semi-strong form efficiency

On Modules for Which All Submodules Are Projection Invariant and the Lifting Condition

The notion of projection invariant subgroups was first introduced by Fuchs in [7]. We will define the module-theoretic version of the projection invariant subgroup. Let R be a ring and M a right R-module. We call a submodule N of M the projection invariant if every projection of M onto a direct summand maps N into itself, i.e. N is invariant under any projection of M. In this note, we give several characterizations to these class of modules that generalize the recent results in [14]. We also define and study the PI-lifting modules which is a generalization of FI-lifting module. It is shown that if each Mi is a PI-lifting module for all 1 ? i ? n, then M = ?n i=1Mi is a PI-lifting module. In particular, we focus on rings satisfying the following condition: (*) Every submodule of M is projection invariant. We prove that if R has the (*) property, then R ? R does not satisfy the (*) property

Determinants of Part-Time Working at Home: Evidence from Turkey

This study examines the probabilities and determinants of part-time working at home for the case of Turkey. Data used in the study are based on Turkish Household Labor Force Survey of 2015. In the context of logistic regression model, a number of demographic, social, cultural, and economic characteristics of employees are used to be main determinants of part-time working at home or out-of- home. According to the results, there is an inverted U-curve relationship between age and part-time working at home decision. For the males and females, the industries related with professional jobs are more attractive for part-time working at home. In addition, as education level of employee rises, the probability of part-time working at home also increases.&nbsp

Hit turn tenis testi ve modifiye edilmiş hit turn tenis testinde kalp atım hızı toplam mesafe ve algılanan zorluk derecelerinin karşılaştırılması

06.03.2018 tarihli ve 30352 sayılı Resmi Gazetede yayımlanan “Yükseköğretim Kanunu İle Bazı Kanun Ve Kanun Hükmünde Kararnamelerde Değişiklik Yapılması Hakkında Kanun” ile 18.06.2018 tarihli “Lisansüstü Tezlerin Elektronik Ortamda Toplanması, Düzenlenmesi ve Erişime Açılmasına İlişkin Yönerge” gereğince tam metin erişime açılmıştır.Hit Turn Tenis Testi ve Modifiye Edilmiş Hit Turn Tenis Testinde Kalp Atım Hızı Toplam Mesafe ve Algılanan Zorluk Derecelerinin Karşılaştırılması Giriş ve Amaç: Hit-turn tenis testi ve modifiye edilmiş hit-turn tenis testinde kalp atım hızı, toplam mesafe ve algılanan zorluk derecelerinin karşılaştırılması olmuştur. Materyal ve Yöntem: Araştırmamıza dâhil edilen 30 erkek sporcunun yaşları 13,07 ± 1,65 yıl, boy uzunlukları 1,60 ± 0,14 cm, beden ağırlıkları 46,88 ± 10,14 kg, antrenman yaşları 6,56 ± 1,71 yıl ve haftada 5.7 ± 0.4 saat antrenman yapmaktaydılar. Çalışmaya katılan 12 kız sporcunun yaşları ise 13,07 ± 1,65 yıl, boy uzunlukları 1,60 ± 0,16 cm, beden ağırlıkları 52,32 ± 14,12 kg, antrenman yaşları 6,90 ± 1,40 yıl ve haftada 5.7 ± 0.4 saat antrenman yapmaktaydılar. Her bir sporcu hem hit-turn tenis testini orijinalinde olduğu gibi sabit duran toplara karşı, hem de bu testi modifiye ederek karşıdan gelen toplara karşı vurarak gerçekleştirmişlerdir. Her iki test uygulanırken hem kız hem de erkek sporcuların toplam koştukları mesafeler, kalp atım hızları ve algıladıkları zorluk dereceleri kayıt edilmiştir. Her iki test arasındaki farklılığı bulmak için parametrik olmayan düzende wilcoxon testi uygulanmıştır. Bulgular: Testler esnasında sporcular Hit-Turn Tenis testinde Modifiye Hit-Turn Testine oranla erkeklerde 104 m kızlarda ise 160 m daha fazla mesafe kat etmişlerdir. Bu fark istatistiksel olarak erkeklerde (z:-2,071; p 0,05). Sporcuların her iki testi de algıladıkları zorluk derecelerine baktığımızda Modifiye Hit-Turn Testi sporcular tarafından daha zorlayıcı olarak bulunmuştur. Sonuçlar: Modifiye Hit-Turn Tenis testinde sporcular filenin diğer tarafından gelen toplara vurmak için, sabit duran toplara yaptıkları vuruşlardan daha fazla güç harcadıkları düşünülmektedir. Ancak fazladan kullanılan bu güç kalp atım sayısını etkilememektedir. Anahtar Kelimeler: Tenis, Kalp Atım Hızı, Hit-Turn Tenis Testi, Aerobik Kapasitede, Dayanıklılık.Comparing Heart Rate Total Distance and Perceived Difficulty Grades in Hit Turn Tennis Test and Modified Hit Turn Tennis Test Introduction and Aim: The hit-turn tennis test and the modified hit-turn tennis test have compared heart rate, total distance and perceived difficulty ratings. Materials and Methods: The age of 30 male athletes included in the study were 13,07 ± 1,65 years, height length 1,60 ± 0,14 cm, body weights 46,88 ± 10,14 kg, training ages 6,56 ± 1, 71 years and 5.7 ± 0.4 hours per week. The ages of 12 girls participating in the study were 13,07 ± 1,65 years, height length 1,60 ± 0,16 cm, body weights 52,32 ± 14,12 kg, training ages 6,90 ± 1,40 years and weekly 5.7 ± 0.4 hours of training. Each athlete has performed both the hit-turn tennis test against the stationary set as well as the original, and also by modifying this test against the opposing crowd. When both tests were performed, the total distance of both male and female athletes, distance of heart rate, and difficulty ratings they perceived were recorded. A nonparametric linear Wilcoxon test was applied to find the difference between the two tests. Results: During the tests, the athletes had more than 160 m in the Hit-Turn tennis test and 104 m in the boys compared to the Modifiye Hit-Turn test. This difference was statistically significant in males (z: -2,071; p 0,05). When we looked at the difficulty levels that the athletes perceive in both tests, the Modified Hit-Turn Test was found to be more challenging by the athletes. Conclusıons: In conclusion, in the Modified Hit-Turn Tennis test, the athlete is expected to spend more power to hit the ball from the other side than from the striking ball. However, this extra power does not affect the number of heart beats. Key words: Tennis, Heart Rate, Hit-Turn Tennis Test, Aerobic Capacity, Endurance

Geochronology and geochemistry of Eocene-aged volcanic rocks around the Bafra (Samsun, N Turkey) area: Constraints for the interaction of lithospheric mantle and crustal melts

International audience40Ar-39Ar age, whole-rock chemical and Sr-Nd isotope data are presented for the post-collisional, Eocene (51.3-44.1 Ma)-aged volcanic rocks from the Bafra (Samsun) area in the western part of the Eastern Pontides (N Turkey) aiming to unravel their sources and evolutionary history. The studied Eocene volcanic rocks can be divided into two groups: analcime-bearing (tephritic lava flows and dykes) and analcime-free (basaltic to trachytic lava flows and basaltic dykes). The analcime-bearing volcanic rocks have a fine-grained porphyritic texture with clinopyroxene phenocrysts, whereas analcime-free volcanic rocks show a variety of textures including hyalo-microlitic microgranular porphyritic, intersertal, trachytic, fluidal and glomeroporphyritic. The volcanic rocks also show evidence of mineral-melt disequilibrium textures such as sieved, rounded and corroded plagioclases, partially melted and dissolved clinopyroxenes and poikilitic texture. Petrochemically, the parental magmas of the volcanic rocks evolved from alkaline to calc-alkaline lava suites and include high-K and shoshonitic compositions. They display enrichments in light rare earth and large ion lithophile elements such as Sr, K and Rb, as well as depletions in high field strength elements such as Nb, Ta, Zr and Ti, resembling subduction-related magmas. The analcime-bearing and -free volcanic rocks share similar incompatible element ratios and chondrite-normalised rare rearth element patterns, indicating that they originated from similar sources. They also have relatively low to moderate initial 87Sr/86Sr (0.7042 to 0.7051), high positive εNd(t) values (+ 0.20 to + 3.32), and depleted mantle Nd model ages (TDM1 = 0.63-0.93 Ga, TDM2 = 0.58–0.84 Ga). The bulk-rock chemical and Sr-Nd isotope features as well as the high Rb/Y and Th/Zr, but low Nb/Zr and Nb/Y ratios, indicate that the volcanic rocks were derived from a lithospheric mantle source that had been metasomatised by slab-derived fluids. Trace element modelling suggests that the parental magma(s) of the volcanic rocks represent mixtures of melts derived by low-degree (~ 5–10 %) partial melting of spinel-lherzolite (40–85%) and garnet-lherzolite (15–60 %) mantle sources. Sr-Nd isotopic modelling also suggests that a 25–35% lower crustal component was added in the parental magmas; AFC modelling additionally indicates minor upper crustal contamination during the evolution of the volcanic rocks. In conclusion, integration of the geochemical, petrologic and isotopic data with regional geology suggests that the analcime-bearing and -free volcanic rocks evolved from parental magma(s) derived from melts of a subcontinental lithospheric mantle and lower crustal sources

Bir Bilim Kampının 8. Sınıf Öğrencilerinin STEM Başarılarına, Fen Motivasyonlarına ve Üstbilişsel Farkındalıklarına Etkisinin İncelenmesi

Bu araştırmanın amacı, TÜBİTAK- 4004 desteği ile gerçekleştirilen bir bilim kampındaki STEM (Fen-Teknoloji-Mühendislik-Matematik) etkinliklerinin 8. sınıf öğrencilerinin STEM başarılarına, fene yönelik motivasyonlarına ve üstbilişsel farkındalıklarına etkisini incelemektir. Araştırmanın hedef kitlesini Karaman ilinin farklı beldelerinden 26 öğrenci oluşturmaktadır. Araştırmada deneme öncesi modellerden tek grup ön test son test deseni; veri toplama aracı olarak ise STEM Başarı Testi, Fen Öğrenmeye Yönelik Motivasyon Ölçeği (FÖYMÖ) ve Üstbilişsel Farkındalık Ölçeği (ÜFÖ) kullanılmıştır. Verilerin SPSS 24 programında bağımlı t-testi kullanılarak anlamlılık düzeyleri test edilmiş, STEM etkinliğinin etki değerleri ve büyüklüğü için ise Cohen değerlerine bakılmıştır. STEM başarısı, fen motivasyonu ve üstbilişsel farkındalık arasındaki ilişki için Pearson korelasyonuna, fen motivasyonu ile üstbilişsel fakındalığın STEM başarısını yordama gücünü ortaya koymak için ise doğrusal çoklu regresyon analizi yapılmıştır. Araştırma sonunda, STEM etkinliklerinin STEM başarısını anlamlı düzeyde artırdığı, STEM başarısı ile fen motivasyonu ve bilişüstü farkındalığın yüksek düzeyde bir korelasyona ve üstbilişsel farkındalığın STEM başarısını yordamada anlamlı bir etkiye sahip olduğu ortaya konmuştur

Effect of Mitomycin C in the prevention of tendon adhesion after surgery and the effect of biomechanical stretching on tendon histology

Objective: In this study, optimal dose to reduce tendon adhesion, by using the dose-dependent fibroblast proliferation inhibition effect of Mit-C, and the level, which the tendon histologies are affected, using biomechanical stretching, is investigated. Methods: 56 chicken flexor tendons were used in this study. A total of 9 groups were formed. Mit-C were applied between the tendon and the sheath; 0.9% NaCl for surgical control groups (groupII, groupIII), 0.1mg/ml Mit-C (groupIV, groupVII), 0.2mg/ml Mit-C (groupV, groupVIII) 0.5 mg/ml Mit-C (groupVI, groupIX). Macroscopic, microscopic, synovial sheath thickness and active fibroblast count were compared between the groups that underwent biomechanical stretching (groups III,V,VII,IX) and groups without biomechanical stretching (groups I,II,IV,VI,VIII). Results: After the macroscopic and microscopic examination, it was observed that the groups with the most adhesion were surgical control groups. The best results from the experimental groups were seen in group VIII, but the results of the groups were similar. When active fibroblast count was examined, it was seen that group VIII had the least active fibroblast count. Conclusion: According to the results of the evaluation, Mit-C, by inhibiting fibroblast proliferation and decreasing synovial sheath thickness, decreased adhesion formation. At the same time, it was concluded that the optimal dose for adhesion prevention was 0.2mg/ml, biomechanical stretching affected tendon histology and the drug was suitable for clinical studies

İşletmelerde kurumsal yönetim anlayışı kapsamında iç denetimin rolü ve İMKB-100 örneği

ÖZETİŞLETMELERDE KURUMSAL YÖNETİM ANLAYIŞI KAPSAMINDA İÇ DENETİMİN ROLÜ VE İMKB – 100 ÖRNEĞİDünyada yaşanan büyük şirket iflasları sonucu, bir takım yasal düzenlemeler ve yeni anlayışlar, bozulan sistemi düzeltmek için ön plana çıkmıştır. Bugün, ülkelerin, piyasaların ve şirketlerin güvenilir ve sağlam yapılar oluşturmasında, kurumsal yönetim (corporate governance) anlayışı ve uygulamaları, önem arz eden bir olgu haline gelmiştir. Yaşanan uluslararası finansal krizlerin arkasında yatan en önemli nedenlerden bir tanesinin, ülkelerin ve şirketlerin kurumsal yönetim anlayışı ve uygulamalarının yetersizliği görüşü, bu kavramın önemini daha da artırmıştır. İç denetim, işletme içerisinde oluşturulan ve diğer kontrollerin etkinliğini ölçen ve değerlendiren, yönetsel bir kontrol aracıdır. Bu fonksiyonel alan içerisinde, iç denetçi, incelenen faaliyetlerle ilgili nesnel analizler, değerlendirmeler, tavsiyeler ve yorumlar yaparak, yönetimin tüm üyelerine, sorumluluklarını etkili bir şekilde yerine getirmelerinde yardımcı olmaktadır. İç denetim, yönetime hizmet etmekle kalmamakta, aynı zamanda yönetim sürecinin de parçasını oluşturmakta ve işletmelerde kurumsal yönetim anlayışı ve uygulamalarının başarısı için anahtar bir rol oynamaktadır. İç denetimin geleceğe dönük yaklaşımları, organizasyonların yönetim kültürü ve anlayışını belirlemektedir. ABSTRACTTHE ROLE OF INTERNAL AUDITING IN CONTEXT OF CORPORATE GOVERNANCE APPROACH ON BUSINESSES AND AN APPLICATION OF ISE–100As a result of big company bankrupts, some legal regulations and new approaches came into scene. Today, corporate governance approach and its applications became important features while building strong structures at countries, markets and companies. The idea that one of the most important reasons behind international financial crises occured is lack of countries’ and companies’ approach and application of corporate governance, increased the importance of this concept. Internal auditing –consists in the business- is a managing control way that measures and evaluates other controls’ efficiency. In this functional area, internal auditor helps all members of management at fulfilling their responsibilities effectively by doing objective analysis, evaluations, recommendations and comments about audited transactions. This internal auditing doesn’t only serve to management, at the same time consists a part of managing process and plays a key role for successfull corporate governance on businesses and its applications. Internal auditing approaches towards future identify management culture and perception of organizations

Skew hochschild extension

WOS:000375773400001In this study, we construct the ring H-n (R; alpha; sigma) on a ring R with a new multiplication, a Hochschild 2-cocycle sigma and an endomorphism alpha of R. This construction is a generalization of the ring R[x; alpha]/x(n+1). We show some properties of the ring H-n (R; alpha; sigma) and we extend some well known results of R[x; alpha]/x(n+1) to H-n (R; alpha; sigma)