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The purpose of this paper is to determine the awareness levels of teachers with regard to cyber bullying. In line with this purpose, the extent of awareness levels of teachers in general, regarding the issue of personal cyber security in their daily lives and the precautions that can be taken in this context have been measured.

Survey method is used in this study. The participants of this research were 184 teachers working at various provinces in Turkey during 2012-2013 academic year. A scale was used in this study.

The findings of the study reveal that the teachers in the sample group of the study have an average level of awareness on cyber bullying, in general. According to the findings of the study, based on branch, gender and frequency of internet use, there are statistically significant differences among teachers’ awareness levels on cyber bullying.

The data collection tool used for the study is a self-report scale and it is restricted to determining the awareness levels of teachers with respect to personal cyber security within the context of cyber bullying awareness and the precautions that need to be taken in this respect.

The data obtained from the study, the authors have conducted, can contribute to updating in-service and pre-service educational contents developed for teachers and prospective teachers, by providing insight for the policy makers.

It is believed that this research will contribute to the literature. On the other hand, this study will guide the policy makers/implementers in Turkey, as well.

The aim of this study is to present an experimental research on a Al₂O₃ · TiO₂ plasma coating on AISI 316 stainless steel substrate with and without SiC particulate reinforcement to show how SiC particulate effect on the hardness, wear resistance and microstructure of the coating.

The main objective of the paper is to investigate the effect of SiC particulate on the coating properties such as hardness, wear resistance and microstructure. Achieving of this purpose, harness and sliding test, surface roughness measurements were carried out. In addition to that parallel work on microstructural examination by optical microscope were also conducted. Owing to SiC particulate is harder than Al₂O₃ · TiO₂ plasma coating, it influence hardness and tribological behavior and result in increasing in hardness values and wear resistance of the coating reinforced with SiC particulate compare with unreinforced Al₂O₃ · TiO₂ plasma coating.

This study provides experimental results about the Al₂O₃ · TiO₂ plasma coating with and without SiC_p reinforcement. The obtained experimental results indicate that SiC_p in the coating is influence hardness, wear resistance and microstructure of the coating and make them much harder and having wear resistance. This result is consisted with the values obtained previous studies that is available in literature.

SEM or TEM studies may be needed for better understanding of wear mechanism. Various percentage of SiC particulate in the coating can be used in the further researches and provide more detailed information about effecting on SiC_p reinforcement of the coating.

The results show that SiC_p reinforcement contribute increasing in hardness and wear resistance of the coating. Those compositions of the coating can easily used in related industrial applications.

This paper fulfils some useful information about SiC_p Al₂O₃ · TiO₂ plasma coating and offers practical help to students, related academicians and researchers in the industry.

Human resources can differentiate firms from their competitors or directly affect the success or failure of firms. As in many sectors, there is a need for qualified employees in the logistics sector, which is of great importance for the national economies. Qualified employees in this sector contribute to the success of the companies and the development of the industry. In this study, it is aimed to reveal the qualifications and characteristics of the labour force needed by logistics companies. It was also aimed to show the impact of COVID-19 on logistics job ads. For this purpose, a total of 1,410 job vacancy postings (before COVID-19) and a total of 1,700 job vacancy postings (during COVID-19) were searched on the kariyer.net website with the word “logistics” and analysed by content analysis method. As a result, it was found that the most advertised province was Istanbul in both periods, the most looked up experience requirement in the candidates was 1-5 years in both periods, the opportunities provided to the candidates (transportation, food and beverage, career, social activity) were not mentioned much in both periods. This study reveals the status of logistics job postings in the period before COVID-19 and during COVID-19. It was also aimed to show the impact of COVID-19 on logistics job ads. We investigated whether the logistics employee demand has changed and whether the pandemic is affecting workforce characteristics. This is the first empirical analysis of the impact of COVID-19 on logistics vacancy postings.

The purpose of this study is to optimize input parameters of particle size and applied load to determine minimum weight loss and friction coefficient for Al2O3/SiC particles-reinforced hybrid composites by using Taguchi’s design methodology.

The experimental results demonstrate that the applied size is the major parameter influencing the weight loss for all samples, followed by particle size. The applied load, however, was found to have a negligible effect on the friction coefficient. Moreover, the optimal combination of the testing parameters was predicted. The predicted weight loss and friction coefficient for all the test samples were found to lie close to those of the experimentally observed ones.

The optimum levels of the control factors to obtain better weight loss and friction coefficient were A8 (particle size, 60 μm) and B1 (applied load, 20 N), respectively. Taguchi’s orthogonal design was developed to predict the quality characteristics (weight loss and friction coefficient) within the selected range of process parameters (particle size and applied load). The results were validated through ANOVA.

Firstly, hybrid MMCs ceramic powders were produced and then mechanical tests and optimization were performed.