AN APPLICATION TO ERROR AND UNCERTAINTY ANALYSIS IN INDUSTRIAL TYPE DRYER EXPERIMENTS

In this study, information is given about the driers commonly used in the industry and the experimental errors anduncertainties that will be encountered in the experiments using these driers are tried to be explained by using the dataobtained from the experiments carried out in an 8 chambers hot oil heated stenter, which is a conveyor type convectiondryer. The fabric used in the experiments is the Thessaloniki type fabric, containing 67% cotton and 37% polyester. Theexperiments were carried out at a drying air temperature of 160 ºC and a fabric advance rate of 23 m/h (0.383 m/s). Thus,the example of error analysis in such experimental studies is provided and criteria that may cause an error for drying systemsare discussed. As a result of the uncertainty analysis, the largest uncertainty in the system occurred in temperaturemeasurements at ±0.367 - ±0.568 ºC values and the error rate for the whole system was found to be 4.08%. In terms ofconducting the experiments in real production conditions and the materials and methods used in the experiments, this studyis thought to will be help researchers that working on drying systems in their experimental studies

The mediator role of communication skill in the relationship between empathy, team cohesion, and competition performance in curlers

Understanding the psycho-social factors such as communication, empathy, cohesion, etc., that affect successful athletic performance is a high priority and primary focus for applied sports psychology. Detailed examination of the athletes' psycho-social characteristics is essential in revealing which processes play an active role in achieving optimum performance. Developing these features of the athlete can contribute to coordinating the team, sharing tasks, increasing motivation, preparing team members for a change, and improving performance. For this purpose, the mediating role of communication skills in the relationship between empathy, team cohesion, and competition performance was examined in a sample of 241 curlers competing in 69 teams in the Turkish Curling League in the 2021-2022 season. During the data collection process, Personal Information Form, Empathic Tendency Scale, Scale for Effective Communication in Team Sport, and Group Environment Questionnaire were used. Competition performance was calculated by giving 1 point for each match won by the teams in the competitions in which the single-circuit round-robin system is applied. Structural equation modeling was used in data analysis to determine the direct and indirect predictive effects between variables. The study showed that empathy and team cohesion predict competition performance through communication skills, and communication skills fully mediate this relationship. Based on the research results, it was evaluated that communication skills have a substantial effect on the competitive performance of athletes, and this finding was discussed in the context of the literature

TURKISH CAR INSURANCE USERS’ KNOWLEDGE AND SATISFACTION LEVELS ABOUT AUTO INSURANCE

Insurance sector has more powerful effect on every countries' economy especially in developed countries. Insurance sector has more subsector like health, retirement, fire, accident, car etc. Car insurance subsector has more importance and value in most countries. Car insurance usage level and users knowledge level are very important indicator for both insurance sector service quality and development level. For this purpose, we prepare a public survey and distribute to nearly 235 people in Marmara region. With this public survey is aimed at enlighten these points; Why does auto insurance holders use car insurance? Which reasons have most importance for them? Which knowledge level of car insurance holders? Prices , range , coverage, fast, amount of compensations.. Car insurance holders satisfaction levels from auto insurance firms’ service and helping quality Car insurance coverage and price balance and users thoughts Car insurance users' insurance law knowledge etc… Depend level to car insurance firms

Psychometric properties of the Internet Addiction Test in Turkish

Background and aims In this study, the Internet Addiction Test (IAT) was adapted to Turkish language, which was originally developed by Young (1998) in English to measure the presence and severity of the Internet dependency. The main purpose was to ensure that the psychometric features and the factor structure of the test were suitable for Turkish university students. Method The study was conducted in two sequent phases. Participants were 990 undergraduate students from several public universities in Turkey. Results In the first phase, an exploratory factor analysis (EFA) was applied to figure out the factor structure of the Turkish version of the IAT. The EFA revealed four factors, which explained 46.02% of the total variance. In the following phase, a confirmatory factor analysis (CFA) was conducted with a different sample, to verify the factor structure that was found in the initial EFA. The CFA resulted four-factor model was satisfactory for the Turkish version of the IAT. These four factors were named as Mood, Relationship, Responsibilities, and Duration. Conclusions Based on the findings, the administration of Turkish version of the IAT provided acceptable results on undergraduate students

INVESTIGATION OF EFFICIENCY OF R717 REFRIGERANT SINGLE STAGE COOLING SYSTEM AND R717/R744 REFRIGERANT CASCADE COOLING SYSTEM

This study is an adaptation of ammonia cascade cooling systems using carbon dioxide on ice cream production machinesand includes thermodynamic analysis of R717/R744 cascade refrigeration system with R717 refrigerant single-stagerefrigeration system and investigation of its efficiency. As a result of the analyses, the COP value of the single-stage systemwas 3.67, the Carnot efficiency was 0.57, the second law efficiency was 0.19 and the power required to operate thecompressor was 27.55 kW. In the cascade cooling system, the COP value was 4.46, the Carnot efficiency 0.59 and thecompressor power 22.7 kW in the high-temperature part, while the COP value was measured as 14.65, the Carnot efficiency0.58 and the compressor power 6.4 kW in the low-temperature part. For the whole cascade system, the COP 3.24 and thesecond law efficiency were found to be 0.43. When the results were compared, it was concluded that although the COPvalue of the cascade cooling system was 0.43 points lower than the single-stage ammonia system, when our country'sclimate conditions and the thermophysical properties carbon dioxide gas were considered together, one of the most suitabledesigns was the cascade cooling system

4E analysis of an underfloor heating system integrated to the geothermal heat pump for greenhouse heating

In this study, 4E (energy, exergy, exergoeconomic, and exergoenvironmental) analysis of an underfloor heating system integrated with the geothermal heat pump of a greenhouse with a usage area of 90 m(2) has been made. When the results of the 4E analysis applied to the system and its elements were examined, the energy efficiency of the heating system in the winter months has been determined to be 77.85% and the exergy efficiency 30.61%. According to the results of exergoeconomic analysis, the levelized energy cost of the system has been determined as 0.894 $/h, the unit exergy cost as 0.826$/h, and the exergoeconomic factor value as 51.12%. According to the results of the exergoenvironmental analysis, the part-based environmental impact of the system was 0.0910 mPts/s, the environmental impact value due to exergy was 0.1823 mPts/s, and the exergoenvironmental factor value was 37.77%. In addition, the equivalent CO2 emission value that will occur if the heating requirement of the greenhouse is met with a natural gas boiler instead of a geothermal heat pump was investigated and a comparison was made between the two systems. Accordingly, it has been determined that the emission of 909.75 kg equivalent carbon dioxide to the environment will be prevented in the 4-month period, which is considered the heating season, by using the heat pump. As a result, the examined heating system has been evaluated as the effective system for heating the greenhouse, reducing energy consumption, and reducing emissions that cause environmental pollution

Design of a 4-DOF grounded exoskeletal robot for shoulder and elbow rehabilitation

The number of cerebrovascular and neuromuscular diseases is increasing in parallel with the rising average age of the world’s population. Since the shoulder anatomy is complex, the number of rehabilitation robots for shoulder movements is limited. This paper presents the mechanical design, control, and testing of 4 degrees of freedom (DOF) grounded upper limb exoskeletal robot. It is capable of four different therapeutic exercises (passive, active assistive, isotonic, and isometric). During the mechanical design, the forces to be exposed to the robot were determined and after the design, the system was tested with strength analysis. Also, a low-cost electromyograph device was developed and integrated into the system to measure muscular activation for feedback and instantaneously muscle activation control for the physiotherapist during the therapy. The system can be used for rehabilitation on the shoulder and elbow.  A PID controller for position-controlled exercises was developed. The test results were presented in terms of simulation and the real system for passive exercise. According to the test results, the developed system can perform the passive exercise and can be used for other therapeutic exercises as well

Outcomes of Unilateral Inferior Oblique Myectomy Surgery in Inferior Oblique Overaction Due to Superior Oblique Palsy

WOS: 000374665200006PubMed: 27800253Objectives: To present the outcomes of unilateral inferior oblique myectomy performed in patients with inferior oblique overaction due to superior oblique palsy. Materials and Methods: Twenty-seven eyes of 27 patients that underwent inferior oblique myectomy surgery for superior oblique palsy between 2002 and 2008 were included. Inferior oblique overaction scores (between 0-4) at preoperative, early postoperative (within 1 week after surgery) and late postoperative (earliest 6 months) visits were reviewed. Results: There were 12 male and 15 female patients. Eighteen were operated on the right eye, and 9 were operated on the left eye. The mean age was 15.62 +/- 13.31 years, and the mean follow-up was 17 +/- 11.28 months (range, 6-60 months). Patients who had horizontal component and V-pattern deviation were excluded. Preoperative and early postoperative inferior oblique overaction scores were 2.55 +/- 0.75 and 0.14 +/- 0.36, respectively, and the difference was statistically significant (p<0.01). This improvement was maintained up to the late postoperative period. Conclusion: Due to its promising short-term and long-term results, inferior oblique myectomy can be the first choice of surgery for inferior oblique overaction due to superior oblique palsy

THE EFFECTS OF BASIC PSYCHOLOGICAL NEEDS ON PSYCHOLOGICAL SKILLS OF ATHLETES

Introduction and Aim: Psychological skills are one of the determining factors in an individual's sportive performance. The psychology of the athlete before, during and after the competition directly affects his or her performance in the competition. According to the theory of self- determination, satisfying the individual's basic psychological needs is necessary for individual growth, integration, development, mental health and wellbeing. It has become necessary to conduct a research on how effective the satisfaction of basic psychological needs in the development of psychological skills affecting the performance of the athlete during the competition can be achieved by going out of this theoretical way. In this context, it is aimed at investigating the effect of basic psychological needs on psychological skills of athletes.Method: A total of 150 athletes, 39 females and 111 males, participated in the research in various sports branches. “Assessment of Psychological Skills by Athletes Inventory” and “Basic Psychological Needs Inventory” have been conducted to athletes. Descriptive statistical analysis, t test, ANOVA and linear regression analysis have been used in the analysis of the data. Findings: As a result of the analyses, there is no significant difference on the gender basis according to the scores obtained from the “Assessment of Psychological Skills by Athletes Inventory”, while there is a significant difference in favor of the national athletes in terms of being national athletes (p=.004). Additionally, a linear regression analysis has been conducted to designate the extent to which the psychological needs of the athletes explain their psychological skills. According to the results, the basic psychological needs explains 22.1% of the total variance related to the psychological skills of the athletes (β=.479, t=6.629, p=.000). Result: Accordingly, it can be said that satisfying basic psychological needs will contribute to the development of basic psychological skills.  Article visualizations

Doku Mühendisliğinde Yeni Tip Grafen Esaslı Kemik İskelesi

Biyoimplant mühendisliği hasarlı dokuları ve organları onarmak, tamir etmek ya da korumayı amaçlamaktadır. Her yıl çok sayıda insan kaza ya da çeşitli hastalıklardan kaynaklı olan iskelet kusurlarındaki kemikleri onarmak/tamir etmek istemektedir. Bu nedenle üzerinde yeni kemik büyümesinin oluşabileceği iskeleleri oluşturabilmek çok farklı biyomalzeme türleri kullanılmıştır. Hidroksiapatit, apatit wollostonit ve karbon temelli biyomalzemeler bu amaçla kullanılmıştır. Karbon nanomateryal baskılı iskeleler ticari olarak ulaşılabilirlik, mekanik stabilite, biyolojik uyumluluk özelliklerinden dolayı kullanımı oldukça yaygın biyomalzeme grubudur. Karbon esaslı iskeleler osteojenikfarklılaşma, kemik doku yenilenmesi, etkili hücre çoğalması özelliği göstermektedir. Kemik iskeleleri doku mühendisliğinde kemik büyümesi, yenilenmesi, tamiri, kemik dokusu hücrelerinde farklılaşma, adhezyon için temel yapı taşı olarak görülmektedir. Kemik iskeleleri gibi hareket eden çok sayıda karbon nanomateryali mevcuttur. Karbon nanotüpler, grafen ve fulleren kemik iskelesi olarak kullanılabilen karbon esaslı malzemelerin başlıcalarıdır. Grafen ve türevleri dikkat çekici fiziksel, kimyasal ve biyolojik özelliklere sahip 2D karbon esaslı bir malzemedir. Grafen mükemmel elektriksel iletkenliği, biyouyumluluğu, yüzey alanı ve termal özellikleri yüzünden bilim dünyası tarafından ilgi görmektedir. Grafenin tabakaları yüksek mekanik dirence ve yüksek spesifik yüzey alanına sahiptir. Dahası grafenin kök hücre farklılaşmasını ve biyomateryal özelliklerini geliştirdiği literatürde raporlanmıştır. Gerçekleştirilen çalışmada grafenin biyouyumluluk özellikleri, grafenin biyomateryal olarak kullanımına dair son çalışmalar ve karbon temelli maddelerin klinik olarak uygulanabilmesi amacıyla biyogüvenlik tartışmaları incelenmiştir