Ultrafine conducting fibers: metallization of poly(acrylonitrile-co-glycidyl methacrylate) nanofibers

Electrospun poly(glycidylmethacrylate) (PGMA) and poly(acrylonitrile-co-glycidyl methacrylate) (P(AN-GMA)) nanofibers were coated with monodisperse silver nanoparticles by using an electroless plating technique at ambient conditions. Oxirane groups on the surface of nanofibers were replaced with reducing agent, hydrazine. Surface modified nanofibers were allowed to react with ammonia solution of AgNO3. A redox reaction takes place and metallic silver nucleate on fibers surface. Parameters affecting the particle size were determined

Analysis on Loneliness Levels of Students in Summer School of Physical Education and Sports School

The purpose of this study is to analyze the loneliness levels of students studying in 2017-2018 summer school of Balıkesir University School of Physical Education and Sports by some demographic characteristics. This is a descriptive study. The research population is composed of 865 students studying in 2017-2018 summer school of Balıkesir University School of Physical Education and Sports and the sample is composed of randomly selected 348 students. “UCLA Loneliness Scale” adapted into Turkish by Demir (1989) was applied in the study. The overall reliability of the loneliness scale was found to be α = 0.74. Kolmogorov Smirnov test was evaluated for the conformity of UCLA Loneliness Scale to the normal distribution in data analysis. Since all data were observed not to be normally distributed, Mann Whitney U and Kruskal Wallis tests ranked among the non-parametric tests were performed to compare the loneliness levels. All analyses were performed with SPSS v17.0 (SPSS Science, Chicago, IL, USA). In conclusion, it has been determined that the loneliness levels of the participants are high (51.07%), there is no statistically significant difference by the variables of sex, age, adequate leisure time, recreation and the place of residence while significant differences have been observed by the variables of department, branch and grade

Ultrasound evaluation of metabolic syndrome patients with hepatosteatosis

Objective: The exact incidence of hepatosteatosis in patients with metabolic syndrome (MetS) is unknown; also there is no valid, simple and inexpensive method to evaluate and follow-up for patients with MetS. In our study, we aimed to demonstrate the frequency of hepatosteatosis, and whether demonstrate presence and degree of steatosis using liver ultrasonography may provide additional benefit for evaluating and following-up in MetS patients with non-alcoholic fatty liver disease. Methods: One hundred and twelve patients with MetS were included to the study. Patients divided into three groups; control group (n= 36) consisted of patients without hepatosteatosis, group 1 (n=43) consisted of patients with grade 1 hepatosteatosis. Finally, group 2 (n= 33) consisted of patients with grade 2 hepatosteatosis. The relationship between the presence and degree of the hepatosteatosis and MetS parameters were analyzed.Results: The incidence of hepatosteatosis was found 69.4% in patients with MetS. There were significantly differences in HOMA-IR, AST, ALT and GGT levels among control group and group 1 (p<0.05 for all). There were also significantly differences in waist circumference, fasting blood glucose, fasting insulin, HOMA-IR, AST, ALT, GGT, ferritin, CRP, sedimentation, uric acid and microalbuminuria levels among control group and group 2 (p<0.05 for all). Blood pressures and lipid profiles were similar among all groups (p>0.05 for all). Besides, there were significantly differences in waist circumferences, fasting insulin, HOMA-IR, GGT, uric acid, CRP levels among group 1 and 2 (p<0.05 for all).Conclusion: Our study indicates that MetS related parameters; especially insulin resistance, were significantly different in patients with hepatosteatosis compared to patients without hepatosteatosis. Because of the different measurment of waist circumferences among groups, we recommend to use liver ultrasonography and waist circumference together to evaluate and follow-up for MetS patients with hepatosteatosis. J Clin Exp Invest 2013; 4 (2): 153-158Key words: Fatty Liver, metabolic syndrome X, ultrasonograph

Investigation of wear behavior of aged and non-aged SiC-reinforced AlSi7Mg2 metal matrix composites in dry sliding conditions

Metal matrix composites (MMCs) with their splendid mechanical properties have been specifically designed for use in fields such as aerospace and aviation. The presence of hard ceramic particles in MMC increases the hardness of the matrix product and decreases its coefficient of friction. Therefore, the wear resistance is improved. Moreover, the mechanical properties of these composite materials can be improved by applying heat treatments. In this study, AlSi7Mg2 MMCs with 15 wt% SiC reinforcement were produced by squeeze casting technique. Some of the composites were aged by heat treatment. Hardness values of aged and non- aged composites were compared. In addition, abrasive wear behaviors of these composites were investigated on pin-on-disk device, depending on the load (7, 12 and 17 N), the sliding speed (0.2, 0.3 and 0.4 m/s) and the sliding distance (700, 1000 and 1300 m). Worn surfaces were also analyzed by scanning electron microscopy (SEM). As a result of the analyses, it was determined that both the hardness values and the wear resistance were higher in the composites subjected to aging treatment. Furthermore, it was observed that the increase in the applied load led up to the weight loss. The increase in the sliding distance increased both friction coefficient and weight loss. The increase in sliding speed also made way for the friction coefficient but ensured less weight loss. When SEM images were examined, it was ascertained that deformation and tribo-surface formation had a significant effect on weight losses

NUTRITION ATTITUDES AND INFORMATION LEVELS OF FOOTBALL REFEREES

This study aims at revealing the changes in nutrition attitude and knowledge levels of football referees. 130 referees actively serving as Candidate, Provincial and Regional Referees in Izmir, Konya, Aksaray and Niğde provinces constituted the sample group of the study. The personal information form was used in obtaining the socio-demographic information and the nutrition knowledge and attitude scale developed by Ertürk (2010) was used in determination of the nutrition attitude and knowledge. The variance and homogeneity of the data were tested, "Independent Samples t Test" was used for binary comparisons, "One Way Anova" for differences between groups in multiple comparisons, and "Tukey" test for the determination of variation sources. The nutritional attitudes of the provincial and district referees were higher than those of the candidate referees and the nutritional information of the candidate referees were higher than the provincial and district referees and this change was statistically found to be significant (P &lt;0.05). While no change due to the gender factor was observed, nutrition information of the referees received nutrition lessons was found to be higher than the referees who did not, and this change was statistically found to be significant (P &lt;0.05). No difference was found in nutritional attitudes and knowledge of the referees depending on factors such as age, income, sibling, years of service, and level of education. As a result, it can be said that candidate referees who have just started their duties have more nutrition knowledge than provincial and district referees, and provincial and district referees have better nutrition attitudes than candidate referees. Football referees are thought to be an important issue in renewing their nutritional attitudes and knowledge in order to improve their performance and quality of life.  Article visualizations

Mikoriza uygulaması ve farklı sulama seviyelerinin geç dönemde yetiştirilen hıyarın verim ve verim bileşenleri üzerine etkisi

Mikoriza kök mantarı olarak adlandırılmakta ve kök korteksi içinde kolonize olarak çok sayıda lif üretmektedir. Üretilen bu lifler ile kök yüzey alanı genişlemekte ve bitkinin normalde alamayacağı uzaklıktaki su ve besin elementlerini alarak bitkiye ulaştırmaktadır. Bu çalışmanın amacı, mikoriza uygulamasının farklı sulama seviyelerinde hıyar bitkisinin verim ve verim bileşenleri üzerine etkisinin belirlenmesidir. Şanlıurfa ilinde 2017 yılı geç dönemde (ağustosekim) yürütülen bu araştırma, tesadüf blokları bölünmüş parseller deneme desenine göre 3 tekerrürlü olacak şekilde kurulmuştur. Ana parsel mikoriza uygulaması, alt parseller ise sulama suyu seviyelerinden (Kcp1:0.66, Kcp2:1.00 ve Kcp3:1.33) olmuştur. Sulama suyu miktarı A sınıfı buharlaşma kabına göre hesaplanmış ve damla sulama yöntemi ile parsellere uygulanmıştır. Araştırmadan elde edilen sonuçlara göre, hıyar bitkisine güz dönemde uygulanan sulama suyu miktarı 334-673 mm, bitki su tüketim değerleri ise 379-685 mm arasında değişmiştir. Hıyar bitkisinin verimi 20.54 t ha-1 ile 33.66 t ha-1 arasında gerçekleşmiştir. En yüksek verim mikoriza uygulamasının yapıldığı ve sulama suyu ihtiyacının %133’ünün karşılandığı konudan elde edilmiştir. Meyve çapı, meyve boyu ve meyve ağırlığı değerleri; sırasıyla 29-36 mm, 134-161 mm ve 103-135 g arasında ölçülmüştür. Çalışma sonucunda, mikoriza ve sulama uygulamasının hıyar bitkisinin verim ve verim parametreleri üzerinde önemli bir etkiye sahip olduğu tespit edilmiştir

Comparison of Emotional Intelligence Levels of Students Studying in Summer School of Physical Education and Sports with Their Life Satisfaction

The purpose of this study is to compare emotional intelligence levels of students studying in 2017-2018 summer school of Balıkesir University School of Physical Education and Sports with their life satisfaction by some demographic characteristics. This is a descriptive study. The research population is composed of 865 students studying in 2017-2018 summer school of Balıkesir University School of Physical Education and Sports and the sample is composed of randomly selected 292 students. In the study, “Emotional Intelligence Inventory in Sports” developed by Shutte et al. (1998), revised and adapted by Lane et al. (2009) for use in sports with Turkish reliability and validity performed by Adiloğulları and Görgülü (2015) and 5-point Likert type scale “The Satisfaction with Life Scale (SWLS)” developed by Diener et al. (1985) with the purpose of determining the life satisfaction of people and adapted into Turkish by Durak et al. (2010) were used. General reliability value of emotional intelligence scale was found as α=0.927 and the same value of life satisfaction scale was determined as α=0.819, indicating a high level of reliability. Anova, Kruskal Wallis test, Jonckheere-Terpstra test were used in data analysis. All analyses were conducted with SPSS v17.0 (SPSS Science, Chicago, IL, USA).In conclusion, it has been determined that emotional intelligence levels of the participants differ by the variable of age in the dimension of use of emotions, by the variable of department in the dimensions of evaluation of one’s own feelings and social skills and there is a difference by the variable of age regarding life satisfaction. It has also been established that there isn’t any relation between the emotional intelligence levels and life satisfaction of individuals

Determination of Barreling of Aluminum Solid Cylinders During Cold Upsetting Using Genetic Algorithm

This study presents Genetic Programming models for the formulation of barreling of aluminum solid cylindersduring cold upsetting based on experimental results. The maximum and minimum radii of the barreledcylinders having different aspect ratio (d/h= 0.5, 1.0 and 2.0) were measured for various frictional conditions(m=0.1-0.4). The change in radii with respect to height reduction showed different trends before and afterfolding, therefore, the corresponding reduction ratios of folding were also determined by using incrementalupsetting. Genetic programming models were prepared using the experimental results with the input variablesof the aspect ratio, the friction coefficient, and the reduction in height. The minimum and maximum barrelingradii were formulated as output taking the folding into consideration. The performance of proposed GP modelsare quite satisfactory (R2 = 0.908-0.998).Keywords: Upset, forging, barreling, bulging, axisymmetric compression

4+4+4 Kesintili Zorunlu Eğitim Sisteminin Sınıf Öğretmenlerinin Görüşleri Doğrultusunda Değerlendirilmesi

Bu araştırmanın amacı, ilkokula başlama yaşının 72 aydan 66 aya indirilmesine, zorunlu eğitimin 4+4+4 şeklinde 12 yıllık kesintili eğitime dönüştürülmesine, bakanlığın gerçekleştirdiği alan/yan alan değişikliklerine ve yeni eğitim sisteminin uygulanışı sırasında yaşanan sorunlara ilişkin sınıf öğretmenlerinin görüşlerini belirlemektir. Çalışma, nitel araştırma yöntemlerinden; olgubilim (fenomenoloji) desenine uygun olarak yürütülmüştür. Araştırmada amaçlı örnekleme yöntemlerinden ölçüt örnekleme yöntemi kullanılmıştır. Araştırmanın çalışma grubu, İç Anadolu Bölgesi’nde X ilinin Y ilçesinde görev yapan 6 sınıf öğretmeninden oluşmaktadır.  Görüşme verilerinin yorumlanması sürecinde betimsel analiz, içerik analizi ve sürekli karşılaştırma tekniği kullanılmıştır. Araştırma bulgularına göre katılımcılar 12 yıllık zorunlu eğitim sistemini savunurken, okullardaki alt yapı eksikliğini, okula başlama yaşını, öğretmenlerin branş değişikliğini ve hizmet içi eğitimin yetersizliğini eleştirmişlerdir.Anahtar Sözcükler:  4+4+4 eğitim sistemi, hizmet içi eğitim, alan değişikliği, sınıf öğretmenler

Evaluación de parámetros de estrés oxidativo y actividades metabólicas de enfermeras trabajando en turnos diurnos y nocturnos

Se objetivó evaluar estrés oxidativo y actividades metabólicas de enfermeras en turnos diurnos y nocturnos. Participaron enfermeras de Unidad de Terapia Intensiva (UTI, n=70) y del servicio común (SC, n=70). Se obtuvieron muestras sanguíneas al inicio y al final de los turnos para medir parámetros de estrés oxidativo. Las actividades metabólicas también fueron analizadas utilizando brazaletes SenseWear. Los parámetros de estrés oxidativo aumentaron hacia el final de los turnos de todas las enfermeras SC y UTI, comparados con la medida de inicio. Los niveles de TAS, TOS y OSI no eran significativamente diferentes entre enfermeras SC y UTI al cierre de los turnos diurnos y nocturnos. Las actividades metabólicas de enfermeras SC y UTI se mostraron similares. Consecuentemente, los parámetros de estrés oxidativo y las actividades metabólicas de enfermeras SC y UTI no resultaron diferentes, y todas las enfermeras sufren efectos semejantes en sus turnos, tanto diurnos como nocturnos.O objetivo deste estudo foi avaliar o estresse oxidativo e as atividades metabólicas das enfermeiras em turnos diurnos e noturnos. Enfermeiras da Unidade de Tratamento Intensivo (UTI) (n=70) e do serviço comum (SC) (n=70) participaram do estudo. Logo no início e ao final dos turnos, amostras de sangue foram obtidas para medir parâmetros de estresse oxidativo. Atividades metabólicas também foram analisadas com o uso da braçadeira SenseWear. Parâmetros de estresse oxidativo aumentaram no fim dos turnos de todas as enfermeiras SC e UTI quando comparados ao início dos turnos. Comparados às enfermeiras SC, os níveis de TAS, TOS e OSI das enfermeiras de UTI não eram significativamente diferentes no final dos turnos diurnos e noturnos. Além disso, as atividades metabólicas das enfermeiras de SC e UTI se revelaram como sendo similares. Assim, os parâmetros de estresse oxidativo e as atividades metabólicas das enfermeiras SC e UTI não eram diferentes, e todas as enfermeiras sofrem efeitos semelhantes dos turnos, tanto no dia quanto na noite.The aim of this study was to evaluate the oxidative stress and metabolic activities of nurses working day and night shifts. Intensive care unit (ICU) (n=70) and ordinary service (OS) nurses (n=70) were enrolled in the study. Just before and the end of the shifts, blood samples were obtained to measure the participants' oxidative stress parameters. Metabolic activities were analyzed using the SenseWear Armband. Oxidative stress parameters were increased at the end of the shifts for all OS and ICU nurses compared to the beginning of the shifts. Compared to the OS nurses, the ICU nurses' TAS, TOS, and OSI levels were not significantly different at the end of the day and night shifts. The metabolic activities of the OS and ICU nurses were found to be similar. As a result, the OS and ICU nurses' oxidative stress parameters and metabolic activities were not different, and all of the nurses experienced similar effects from both the day and night shifts