Recently Government of India (GOI) has announced that country has achieved the milestone of 100 GW from renewable energy sources. Also, The Indian government wants to install 450 gigawatts of renewable energy capacity by 2030, with solar accounting for 280 GW (more than 60%). To ensure that the sun continues to shine over the country's sunrise industry for the next ten years, roughly 25 GW of solar energy capacity will need to be added each year But a major problem with the solar power plant is the accumulation of dust and soiling on the surface of a photovoltaic panel. It reduces the efficiency of the photovoltaic panel. Generally, dust problem occurs in the dessert area while soiling problem occurs in other locations. However, solar power plants performance also depends on the tilt angle, Surface material of photovoltaic panel, solar incidence angle, and weather patterns (humidity, rainfall, airborne particle concentration, wind, etc.). Accumulation of dust on the photovoltaic panel surface partially stops the transmission of solar radiation, which decreases photovoltaic panel conversion efficiency and the overall performance of the solar power plant (

A total of 175 students randomly selected (98 boys and 77 girls) studying at Kocaeli Hayrettin Gürsoy Sports High School in Kartepe district of Kocaeli province.Qualitative data collection method was used in this study.In the study, Personal Data Form, self-conf idence scale, exam anxiety (attitude) inventory (SKE).It has been observed that participants had signif icant differences between gender, licensed sports status, father's profession, mother's profession, family material income status, as well as levels of self-conf idence and exam anxiety.In addition, it was concluded that there was a negative correlation between exam anxiety levels and self-conf idence States of the subjects participating in the study.Finally, while no correlation relationship was found from exam anxiety according to the age variable, self-conf idence was observed to be a positive signif icant relationship related to family.

The analysis was performed on all matches (n = 1239) in the f ive national leagues (France, Greece, Italy, Spain, and Turkey) of the 2018-2019 season.A one-way welch analysis of variance followed by a Games-Howell post hoc test was performed to assess differences in game-related statistics between the leagues.Game-related statistics that discriminate among the leagues were assessed by factorial discriminant analysis.France and Spain, most similar leagues but Italy and Turkey most differed leagues regarding GRS.Fouls and assists were the most distinguished among the leagues and demonstrated the most signif icant effect size.The discriminant analysis yielded four signif icant functions.The results of this study suggest that professional basketball games were played differently in each designated leagues of Europe.

The research is based on an exploratory sequential design, one of the mixed-method designs. In order to determine teachers' level of connectedness to nature, M.N.E (Ministry of National Education) within the scope of in-service training, the "Connectedness to Nature Scale" was applied to 65 teachers who received trekking (summer) training trainers in Aksaray province. Semi-structured interviews were conducted with 20 teachers selected by random sampling method from among the teachers who participated in the scale. It was seen that teachers' level of commitment to nature is high. Further, the teachers' level of connectedness to nature did not show a signif icant difference as per the gender and professional service life variables, but there was a signif icant difference according to the variable of age and school type. It has been determined that as the age of the teachers' increase, their level of connectedness to nature increases. In the qualitative part of the study, it was concluded that teachers feel freer, f ind peace and are a part of nature when they are in nature. It has also been concluded that the biggest responsibility in nature is not to harm and protect nature.

This study aims to examine the anxiety levels of athletes playing football in different leagues in terms of marital status, the league they play in, communication between teammates, eating habits, hygiene habits, approach to people and training program variables. The study was carried out on 447 regional amateur league football players and 173 professional league football players in the 2019-2020 football season when the Covid-19 outbreak was as intense in our country as the whole world. In the study, the State-Trait Anxiety Inventory to measure participants' state and trait anxiety levels were used as a data collection tool. A significant difference was found in the state anxiety of participants according to the variable of the league they played. A significant difference was observed in trait anxiety levels regarding communication with teammates. It was observed that there was a significant difference in state anxiety levels in the dietary habits variable. Regarding cleaning habits, there was a significant difference in both state and trait anxiety levels. A significant difference was found in both the state and trait anxiety levels of the participants about their attitudes towards people. A significant difference was observed in the state anxiety of the participants who were given a training program by the club they played in. .

The study presents an insight from an Erasmus programme project named "Knowledge is power, age ain't matter!" conducted at Dumlupinar University. In the study, ten individuals participated and, to collect data as per leisure satisfaction scale and proper satisfaction with life scale were used. Analysed results showed signif icant differences between the pre and post-tests results. In conclusion, this study showed that the ten-week recreation programme positively affects both leisure and life satisfaction in individuals 50 and over.

To conduct this study a questionnaire form including three parts has been used to collect the data. In the first part, the personal information form is used. The Attitude Scale for Healthy Nutrition (ASHN) in the second part and the Digital Gaming Attitude Scale (DGAS) in the third part are used. In the results of the difference analysis according to the demographic characteristics of the total scores of ASHN and DGAS, it is understood that scores of ASHN have significant differences regarding gender, mother education and sports frequency. However, there is no statistically significant difference in the score of DGAS according to demographic characteristics. The results obtained in the research proves that individuals' awareness of healthy nutrition increases thanks to sports. Consequently, their interest in a digital game decreases. Studies in the literature on digital games indicate that there are undesirable problems in individuals who are connected to these games at the level of addiction.

In order to examine the basic psychological needs of the students, 372 students studying in secondary schools were selected. In the research, it was found that there were differences between the students according to age, gender, participation in out-of-school activities, and social identification variables. As a result, it can be said that there was a relationship between the satisfaction of basic psychological needs of individuals and sporting behaviour in physical education.

The research was designed with correlational research model, one of the quantitative approaches. In the selection of the research group, purposeful sampling approaches and convenience sampling method were applied. The research group consists of 351 weightlifters, 136 women and 215 men. The data were obtained using the "Personal Information Form", "Sports Leadership Scale (SLS)" and "Sport Leadership Strength Scale-Other (SLSS-O)". Relevant Statistical analysis was applied to interpret the data. Consequently, low-level positive correlations between SLS and all sub-dimension mean scores of SLSS-O were determined.