Opinions of High School Students involved in Violence

The aim of this research is to assess the opinions of students in a variety of high schools at different class levels who received disciplinary punishment for violence. The research comprised 35 boys and 10 girls, for a total of 45 students. The data for the research were obtained with semi-structured interviews. The results show that the students used violence due to insufficient anger control, insufficient problem solving skills, and problems with delayed gratification and peer support. Additionally, it was found that the academic success of the students was low, they were repeating classes, had absences from school and problems with their families. During students’ evaluation of the events for which they received disciplinary punishments, they stated that they would experience the same problems in similar situations or would quickly remove themselves from the scene as a solution. The guidance service, which is the school support service, helped; however this was insufficient and it was emphasized that management and teachers did not show sufficient interest. Additionally though some of the students were receiving medical treatment, it was observed that their problems continued. This situation was evaluated as showing that to solve the problem team work is necessary. In conclusion, in addition to medical evaluation of students for antagonism disorder and behavior disorder, it is proposed that projects with a holistic basis including family training, anger control studies, conflict resolution skills and peer mediation training supported by social services are necessary. Key Words: violence in school, aggressiveness, disciplinary punishmen

QT and JT dispersion in children with familial mediterranean fever

Objectives: This study aims to determine QT dispersion and JT dispersion, and their relationship with conventional echocardiography values in a group of children with familial Mediterranean fever (FMF). Patients and methods: The study included 48 FMF patients (26 males, 22 females, mean age 11.10±3.42 years; range 5 to 18 years) as the FMF patients and 31 healthy children (17 males, 14 females, mean age 9.61±2.83 years; range 5 to 17 years) as the healthy controls. Electrocardiography and conventional echocardiography were performed on the FMF patients and healthy controls. Both groups were evaluated with a standard 12-lead electrocardiography. QT, JT and RR distances were measured in both groups. The corrected QT (QTc) and corrected JT (JTc) were calculated. QTcd and corrected JT dispersion (JTcd) were detected. Results: There was no statistically significant difference between the FMF patients and healthy controls in terms of RR, QT, QTd, QTcd, JT, JTc, JTd, and JTcd measurements and echocardiography parameters. QTc value was higher in the FMF patients than the healthy controls. Conclusion: QTc value indicates increased ventricular sensitivity and is an important marker of cardiovascular mortality. It has an important effect on sudden cardiac death and arrhythmia. Our study results suggest that electrocardiographic monitoring may be useful in patients with FMF

Noise identification based on spectral analysis and noisy transfer function approach for fuel cells

In this study, some measurements like the current, voltage and hydrogen flow based on the fuel cell are investigated in spectral-domain as well as their time-domain representations and then, their spectral properties are extracted. Besides this, taking the simplified transfer function approach into account, which is defined between the hydrogen flow and current of the cell as an input-output pair, more detailed results are obtained. Therefore, the spectral parts of the fuel cell are put into categories under the impacts coming from the process, measurement circuits and digitizers. The process noise to be defined at very small frequencies (<15 Hz) can be explained as the effects of the various physical and chemical interactions emerging in the fuel cell. Moreover, this study analysed the spectral characteristics of fuel cells for current, voltage and hydrogen flow in detail

Modeling of hydrogen production with a stand-alone renewable hybrid power system

Hydrocarbon resources adequately meet today's energy demands. Due to the environmental impacts, renewable energy sources are high in the agenda. As an energy carrier, hydrogen is considered one of the most promising fuels for its high energy density as compared to hydrocarbon fuels. Therefore, hydrogen has a significant and future use as a sustainable energy system. Conventional methods of hydrogen extraction require heat or electrical energy. The main source of hydrogen is water, but hydrogen extraction from water requires electrical energy. Electricity produced from renewable energy sources has a potential for hydrogen production systems. In this study, an electrolyzer using the electrical energy from the renewable energy system is used to describe a model, which is based on fundamental thermodynamics and empirical electrochemical relationships. In this study, hydrogen production capacity of a stand-alone renewable hybrid power system is evaluated. Results of the proposed model are calculated and compared with experimental data. The MATLAB/Simscape (R) model is applied to a stand-alone photovoltaic-wind power system sited in Istanbul, Turkey. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved