ANALYSIS OF THE FACTORS WHICH INFLUENCE PARTICIPATION OF UNIVERSITY STUDENTS IN RECREATIONAL ACTIVITIES

The purpose of this study is to find out recreational tendencies of university students, the factors which prevent them from participating in recreational activities and whether these factors differ according to some variables. 200 students, 96 males and 104 females, studying in three different faculties (faculty of theology, faculty of education and faculty of sport sciences) of Samsun Ondokuz Mayıs University during 2016-2017 Academic Year participated in the study voluntarily. Leisure Constraints Scale was used as data collection tool. SPSS 22.0 was used in the statistical analysis of our data. Factor analysis was conducted on the data obtained, followed by Anova Test, Kruskal Wallis Test, Mann-Whitney-U test and T Test according to the data set. When the results of our study were examined, no statistically significant difference was found between age groups in terms of lack of access and friends, lack of information, lack of time and lack of facility, and between genders in terms of lack of facility, lack of time, individual psychology and lack of information (p>0.05). Statistically significant difference was found between faculties in terms of lack of knowledge and individual psychology, between genders in terms of access and lack of friends (p<0.05). As a conclusion, it can be seen that there are differences between students studying in different faculties in terms of lack of knowledge about recreational activities, problems in finding facilities and individual psychology.   Article visualizations

EXAMINING AGGRESSION LEVELS OF ELITE RUGBY ATHLETES IN TERMS OF COMMUNICATION SKILLS

The aim of this research is to study the correlation between the aggression level and communication skills of elite rugby athletes. The study was conducted with a total of 115 rugby athletes (37 female, 78 male) who played on teams that took place in the Turkish Rugby League during 2016-2017. A 4-question demographic survey and the Kiper (1984) Aggression Scale were applied to the athletes as well as the Communication Skills inventory of Ersanlı and Balcı. The group of rugby athletes aged 25 and below was found to be at a higher bold aggression level compared to the group aged 26 and above (p<0.05). As for the passive aggression subscale scores, the group aged 25 and below was at a lower level compared to the group aged 26 and above (p<0.05). The bold aggression level of rugby athletes with a university education was higher compared to athletes with a high school and elementary education (p<0.05). In addition, a positive correlation was found between bold aggression subscale scores and total communication skills scores. As a result, it can be said that the communication skills of athletes need to be increased in order to decrease disruptive and passive aggression and increase bold behavior. As communication skills improve, the possibility of displaying aggressive approaches and behavior decrease.   Article visualizations

DESIGN AND CALIBRATION OF A CAPILLARY FLOWMETER SET FOR MEASUREMENT OF GAS FLOWS

In this study, design and calibration of a capillary flowmeter set was represented. The capillary flowmeters will be used for measurements of small gas flows having laminar flow regime. The gases (such as, nitrogen, argon, methane, hydrogen and carbon-dioxide) supplied from high pressure gas bottles and passed through capillary flowmeters (1 to 3) at various times. Each capillary flowmeter was made of glass and calibrated with one or two gases. Outlet of the capillary flowmeters were connected to the needle valves which have been used for regulating gas flowrates of the capillary flowmeters. Gases individually passed to a bubble flowmeter, and residence time of gases are recorded by using a stop watch. Then, from collected experimental results actual gas flowrates through the capillary flowmeters are calculated by using Hagen-Poiseuille equation

Sulphur removal from Artvin-Yusufeli lignite with acidic hydrogen peroxide solutions

In this study, the optimisation of sulphur removal by H2O2/H2SO4 solutions, and a limited kinetic measurements by H2O2/HCl solutions have been carried over Artvin/Yusufeli lignite. In kinetic measurements, only the effect of temperature on removal of sulphur has been investigated. By keeping all other parameters constant, with increments in temperature at different times, it has been seen that removal of sulphur is increased. A statistical experimental arrangement which has six parameters and for each parameter there is twenty five experiments with five levels. In generally, pyritic sulphur, total sulphur, organic sulphur and ash removal rates have been determined. According to carried out variance analysis, in removal of pyritic and total sulphur, all parameters are effective, but, in removal of organic sulphur, acid concentration and particle size are not effective, and in removal of ash, only, acid concentration is not effective, however, all other parameters are effective. Copyright © 2016 Inderscience Enterprises Ltd

Silica-based monodisperse PdCo nanohybrids as highly efficient and stable nanocatalyst for hydrogen evolution reaction

Addressed herein, a highly active and stable nanohybrid has been synthesized for hydrogen production. The newly prepared nanocatalysts are silica-based palladium-cobalt nanohybrid structures (PdCo@SiO2 nanohybrid) (3.82 ± 0.37 nm). The prepared nanohybrids were fully identified with the help of different analytical techniques such as UV-Vis (Ultraviolet-Visible spectroscopy), XPS (X-ray photoelectron spectroscopy), TEM (Transmission electron microscopy), XRD (X-ray diffraction) and HR-TEM (High-resolution transmission electron microscopy) analyses. This prepared nanohybrid was quite successful in the production of hydrogen from DMAB in ambient conditions (TOF: 108.27 h?1). By the way, it was observed that the DMAB was converted entirely to the product at room temperature with the help of PdCo@SiO2 nanohybrid. Moreover, monodisperse PdCo@SiO2 nanohybrid has shown outstanding reusability performance even after 4th usage in the same reaction. As a result, it can be said that the prepared nanohybrid is highly efficient, stable and durable nanocatalyst for the dehydrocoupling of dimethylamine-borane. © 2018 Hydrogen Energy Publications LLCThe authors would like to thank Dumlupinar and Usak University for funding. Appendix