Değişken Kesitli Doğru Eksenli Kompozit Çubuklarin Serbest Ve Zorlanmiş Titreşimi

Konferans Bildirisi -- Teorik ve Uygulamalı Mekanik Türk Milli Komitesi, 2008Conference Paper -- Theoretical and Applied Mechanical Turkish National Committee, 2008Değişken kesitli doğru eksenli kompozit çubukların zamanla değişen yükler altındaki dinamik davranışı Laplace uzayında teorik olarak incelenmiştir. Değişken kesitli doğru eksenli kompozit çubukları idare eden denklemler Timoshenko çubuk teorisi kullanarak elde edilmiştir. Formülasyonda, dönme ataleti, eksenel ve kayma deformasyonu etkileri göz önüne alınmıştır. Çubuk malzemesi homojen, lineer elastik ve anizotropik kabul edilmiştir. Laplace uzayında elde edilen skaler formdaki adi diferansiyel denklemler, problemin dinamik rijitlik matrisini kesin olarak hesaplamak için tamamlayıcı fonksiyonlar yöntemi yardımıyla sayısal olarak çözülmektedir. Elde edilen çözümler, Durbin’in sayısal ters Laplace dönüşüm yöntemi kullanılarak zaman uzayına dönüştürülmektedir. Değişken kesitli doğru eksenli kompozit çubukların serbest ve zorlanmış titreşim analizi yapılmıştır. Kesit değişim parametresinin (β) dinamik davranışa etkisi araştırılmıştır. Bu çalışmada elde edilen sonuçların ANSYS sonuçları ile uyum içinde olduğu görülmüştür.The dynamic behavior of composite straight rods with variable cross-section subjected to time-dependent loads is theoretically investigated in the Laplace domain. The governing equations for composite straight beams with variable cross-section are obtained using Timoshenko beam theory. The effect of the rotary inertia, axial and shear deformations are considered in the formulations. The material of the rod is assumed to be homogeneous, linear elastic and anisotropic. Ordinary differential equations in scalar form obtained in the Laplace domain are solved numerically using the complementary functions method to calculate the dynamic stiffness matrix of the problem accurately. The solutions obtained are transformed to the real space using the Durbin’s numerical inverse Laplace transform method. The free and forced vibrations of composite straight rods with variable cross-section are analyzed. The effect of cross-section variability parameter (β) on dynamic behavior is investigated. The results obtained in this study are found to be in good agreement with those obtained from ANSYS

Exploring the Relationship Between Personality Traits and e-Learning Autonomy of Distance Education Students

Understanding the relationship between personality traits and e-learning autonomy can help to provide tailored e-learning environments and student support. Although the related literature is rich regarding learner autonomy and personality traits, there is a dearth of research exploring the predictive relationship. This research investigates the relationship between personality traits and e-learning autonomy of distance education students. Data was collected using the Big 5 Personality Traits and e-Learning Autonomy scales from 3435 distance education students of Anadolu University’s Open Education Faculty. Results show that male students have more e-learning autonomy than female students, while female students have higher scores of personality traits except for agreeableness. The e-learning autonomy of distance education students had positive correlations with four personality traits except for neuroticism. Furthermore, extraversion, agreeableness, conscientiousness, and openness were significant predictors of e-learning autonomy behaviors of distance education students

BIT Yönelimli Genç Eğitim Araştırmacılarının Bilimsel Araştırma Motivasyonları ve Yöntem Paradigmalarının İncelenmesi

Methodological paradigms and scientific research motivations of ICT oriented young education researchers was examined in this study. “Scientific Research Motivations and Methodological Paradigms Survey” was used as the data collection tool. 101 young scholars from 8 university completed the survey in 2014-2015 academic year. For the analysis of the collected data, the descriptive statistics of %, f, Sd, N and  and the parametric tests of independent-samples t-test, one-way ANOVA, Pearson correlation coefficient and path analysis were used. It was determined that young education researchers are intrinsic motivated primarily contribute to human life and scientific curiosity and support quantitative paradigm for their scientific research.  It was also revealed that the young education researchers who considered themselves to have a moderate level of technology use had more financial motivation than those who considered themselves to have an advanced level of technology use. It was found that the assistant professors aged 30-39 preferred quantitative paradigm more than 20-29 aged research assistants. The results of path analysis demonstrated that among scientific research motivations scientific contribution significantly predicted quantitative (β=.529, p=.001<.05) and mixed paradigms (β=.425, p=.028<.05).Bu araştırmada BIT yönelimli genç eğitim araştırmacılarının yöntem paradigmaları ile bilimsel araştırma motivasyonları incelenmiştir. 2014-2015 öğretim yılında “Bilimsel Araştırma Motivasyonları ve Yöntem Paradigmaları” anketiyle 8 üniversiteden 101 akademisyenden veri toplanmıştır. Toplanan verilerin analizinde %, f, Sd, N ve  betimsel istatistikleri ile birlikte parametrik testlerden bağımsız iki örneklem t-testi, Pearson korelasyon katsayısı, tek yönlü ANOVA ve yol analizinden yararlanılmıştır. Ulaşılan bulgulara göre BIT yönelimli genç eğitim araştırmacılarının bilimsel araştırma için başta insan yaşamına katkı ve bilimsel merak olmak üzere içsel motivasyonlu oldukları ve daha çok nicel paradigmayı destekledikleri belirlenmiştir. Ayrıca teknoloji kullanımı konusunda kendilerini orta düzeyde gören genç araştırmacıların ileri düzeyde görenlere göre daha fazla parasal motivasyonlu oldukları belirlenmiştir. 30-39 yaş aralığındaki yardımcı doçentlerin 20-29 yaş aralığındaki araştırma görevlilerine göre nicel paradigmayı daha fazla destekledikleri belirlenmiştir. Yapılan path analizi sonucunda bilimsel araştırma motivasyonlarından bilime katkının hem nicel paradigmayı (β=.529, p=.001) hem de karma paradigmayı (β=.425, p=.028) anlamlı bir şekilde yordadığı belirlenmiştir

Is arthroscopic intervention-assisted fragment-specific fixation technique superior to volar plating in distal radius fractures involving the middle column?

Purpose: In this study, the clinical and radiological results of volar plating and arthroscopic intervention-assisted fragment-specific fixation techniques used in patients operated for AO Type B-C distal radius fracture in which the medial colon is affected were compared. Materials and Methods: X-ray and clinical records of 98 patients who underwent surgical treatment for radius distal end (DER) fracture between April 2011 and January 2017. The patient groups treated with arthroscopy-assisted fragment-oriented fixation (Group A) and plate screw fixation with a volar approach without arthroscopic intervention (Group B) were compared in terms of joint range of motion, grip strength, and clinical scores. Flexion and extension, ulnar deviation, radial deviation, pronation, and supination angles measured with a standard goniometer were recorded in the joint range of motion measurement. Grip strength was measured with a Jamar dynamometer for power measurement. DASH score was used in clinical evaluation. Results: When the operated wrists of both patient groups were compared, there was no significant difference between the DASH score, grip strength, palmar flexion, and pronation angles of motion. A statistically significant difference was observed between the mean dorsiflexion angles of 55 degrees in group A and 44 degrees in group B, mean radial deviation angles of 25 and 19 degrees, and the mean supination angles of 87 and 80 degrees, respectively. Conclusion: Although arthroscopic-assisted fragmentspecific fixation is technically a laborious procedure that requires a learning curve in patients with intra-articular distal radius fractures, it may be beneficial to provide better postoperative results, especially in young patients with high range of motion expectations

Sheikh Ubeydullah's movement

Cataloged from PDF version of article.In 1880, a group of Ottoman tribes attacked land held by Persia. As a result, the whole area to the west of Lake Urumiye was affected. The extent of the attacks reached even the city of Tabriz. The leading figure in this movement was an Ottoman Naqshebandi Sheikh named Ubeydullah. His movement is considered to be the first Kurdish uprising that had national aspirations. The stance of the Ottoman Empire towards this movement had various considerations that shall be evaluated in the context of the depressed time, an era in which pressures toward the empire’s dissolution were keenly felt. The aim of the present study is to understand the nature of the sheikh’s movement and how it was shaped by international conditions, especially the Ottoman involvement in it.Kılıç, Mehmet FıratM.S

Türkiye'de pamuk yetiştiriciliğinin enerji bilançosu ve sera gazı emisyonlarının belirlenmesi: Diyarbakır İli Bismil İlçesi Örneği]

In this study, the energy balance and Greenhouse Gas Emissions (GHG) of cotton cultivation in Bismil district of Diyarbakır province in Turkey was defined. The energy balance and GHG of cotton cultivation was computed by conducting face to face surveys with 73 farms in the 2018-2019 cultivation season, which were selected by simple random sampling method. The energy input and output in cotton cultivation were computed as 54 617.62 MJ ha-1 and 65 984.42 MJ ha-1, respectively. Energy inputs occurs of electricity energy with 18 608.40 MJ ha-1 (34.06%), chemical fertilizers energy with 15 254.67 MJ ha-1 (27.93%), diesel fuel energy with 14 364.68 (26.30%), irrigation water energy with 3 559.50 MJ ha-1 (6.53%), machinery energy with 1 152.79 MJ ha-1 (2.11%), chemicals energy with 1 075.76 MJ ha-1 (1.96%), seed energy with 307.98 MJ ha-1 (0.57%), human labour energy with 293.84 MJ ha-1 (0.54%), respectively. Total energy inputs in cotton cultivation can be classified as 67.43% direct, 32.57% indirect, 7.62% renewable and 92.38% non-renewable. Energy use efficiency, specific energy, energy productivity and net energy in cotton cultivation were computed as 1.21, 9.77 MJ kg-1, 0.10 kg MJ-1 and 11 366.80 MJ ha-1, respectively. Total GHG emissions were computed as 6 482.36 kgCO2-eqha-1 for cotton cultivation with the greatest input part for electricity with 47.94% (3 107.60 kgCO2-eqha-1). The electricity followed up nitrogen with 16.29% (1 055.67 kgCO2-eqha-1), irrigation water with 14.82% (960.50 kgCO2-eqha-1), diesel fuel with 10.86% (704.08 kgCO2-eqha-1), seed with 3.07% (199.14 kgCO2-eqha-1 ), chemicals with 2.28% (147.76 kgCO2-eqha-1), phosphorous with 1.78% (115.64 kgCO2-eqha-1), human labour with 1.62% (104.94 kgCO2-eqha-1), machinery with 1.26% (81.85 kgCO2-eqha-1) and potassium with 0.08% (5.18 kgCO2-eqha-1), respectively. Additionally, GHG ratio value was computed as 1.16 kgCO2-eqkg-1 in cotton cultivation. © 2021 Namik Kemal University - Agricultural Faculty. All rights reserved.We would like to thank the cotton producers who supported us in the survey

The Mediating Role of Normative Commitment and the Moderating Role of Organisational Justice on the Influence of Career Development on Job Engagement

An organisation's efficiency and effectiveness can be viewed as depending on the qualification of its employees. Organisational support and career development are among the factors that enable organisations to employ and retain qualified people. This study, which was conducted within the context of a social exchange, investigates the effect of career development on job engagement. As a result of the literature research, it has been determined that career development has a positive effect on job engagement, and it is further considered that normative commitment might have a mediating effect and organisational justice might have a moderating role in this relationship. The data was collected from 234 academics from four foundation universities in the Ankara and Mersin provinces of Turkey. The collected data were analysed using SPSS and AMOS package programs and the R and Python programming languages. The analyses demonstrate that there is a positive causal relationship between career development and job engagement, while normative commitment has a partial mediating role in this relationship, and organisational justice does not have a moderator role.

Analysis of food safety and cold chain knowledge of logistics students

This study was planned and conducted in order to examine the knowledge, attitudes, and behaviors of university students in the logistics department reading about the food safety and cold chain. The study was conducted on 165 university students (59 girls, 106 boys) who are logistics associate degree students. In the collection of the data, 7 information questionnaire and 20 item attitude scale questionnaires were prepared to determine students' demographic characteristics, food safety, and cold chain knowledge, attitudes and behaviors. The obtained data were evaluated with SPSS 20.0 program using frequency (f), percent (%), t-test and one-way variance analysis (ANOVA) method. It has been determined that students have not received any prior training in the marking of "Have you been trained in Food Safety, Hygiene-Sanitation, Nutrition and Health before?" 146 students (88.5%) answered no to the question " Do you find your information on food safety satisfactory " Statistically significant differences were found in the cold chain information group that the students had given the numbers 1, 6, 7 according to their gender (p <0.05). When the average scores of the infectious disease group were examined, it was determined that they participated in all statements in general. It was determined that there was a statistically significant difference between the responses of the students to the expression 1 and 20 in the cold chain of information group according to their gender (p <0.05). It has been concluded that students are not sufficient in food safety and cold chain knowledge. It has been found that most of the students want to be trained by specialists in the field of the field. Lessons in the curriculum have resulted in food safety and cold chain related compulsory courses, or elective courses that will benefit students to be equipped on a sectoral basis after graduation

Kafes Yapıların Modifiye Edilmiş Yapay Arı Koloni Algoritması İle Optimizasyonu

Konferans Bildirisi -- Teorik ve Uygulamalı Mekanik Türk Milli Komitesi, 2013Conference Paper -- Theoretical and Applied Mechanical Turkish National Committee, 2013Bu çalışmada, kafes yapıların optimizasyonunda modifiye edilmiş yapay arı koloni algoritması (MABC) kullanılmıştır. Yapay arı koloni algoritması (ABC); arı kolonilerindeki çalışma mekanizması ve arıların nektar elde etmek için izledikleri stratejilerin taklit edilmesini esas alan sezgisel optimizasyon yöntemidir. Optimizasyon probleminin formülasyonunda; deplasman ve gerilme sınırlayıcıları altında minimum ağırlıklı kafes yapı’nın elde edilmesi amaçlanmaktadır. Yöntemin etkinliği daha önce standart yapay arı koloni algoritması ve farklı sezgisel optimizasyon yöntemleriyle kullanılarak optimum tasarımı yapılmış 200 elemanlı, 29 tasarım değişkenli kafes yapı üzerinde test edilmiştir. Yapılan kıyaslamalar; modifiye edilmiş yapay arı koloni algoritmasının, standart yapay arı koloni algoritması ve diğer optimizasyon yöntemlerine göre daha iyi bir tasarım elde ettiğini göstermiştir. Anahtar Kelimeler: Kafes yapılar, Modifiye edilmiş yapay arı koloni algoritması, Optimizasyo

An epidemiologic study on urothelial carcinomas of bladder

Objectives: In this study, the epidemiological analysis of the bladder cancers was performed accompanied by the known environmental factors.Materials and methods: In this retrospective study, pathology archival materials of 420 patients (350 men (83.4%) and 70 women (16.6%)), consisting of bladder by transurethral resection, cystectomy and cystoprostatectomy specimens, histopathologically diagnosed as urothelial carcinoma and papillary urothelial neoplasia with low malignant potential, were included. For bladder carcinomas, the parameters such as tumor types, age, sex, and invasiveness of tumor were evaluated and analyzed.Results: In the study, it was found that 24.7% of papillary urothelial neoplasia with low malignant potential, 46.1% of low-grade urothelial carcinoma, and 29.0% of high grade urothelial carcinoma. The rate of bladder urothelial carcinomas was 5 times greater in men than in women. In addition, the high-grade papillary urothelial carcinoma was seen more frequently in men than in women (31.2% and 23.1% respectively), while low-grade papillary urothelial carcinoma was seen more frequently in women than in men (32.9% and 18.5% respectively) (p<0.05).Conclusion: The bladder urothelial carcinoma was more common in men than women, and high-grade urothelial carcinoma invading the lamina propria and the muscularis propria also found in a higher ratio in male. Further clinical and experimental studies are needed to explore the cause of high frequency of high-grade types in male gender