Analysis of differences in variables related to health and safety according to the employment type of Korean workers

Introduction: The purpose of this study was to understand the differences in variables related to health and safety according to the employment type of Korean workers, specifically to identify the differences by employment type on in health status, the likelihood of wearing protective gear when working, access to manuals on emotional expression, and access to information on risk factors related to health and safety. Methods: The secondary data of four items on employment type, health type of workers and safety among the 5th Korean Working Condition Survey conducted in 2017 in Korea was used in this study. The data of workers were processed by using SPSS/WIN 23.0 Program and R 3.1.2, and demographic characteristics were quantified as frequency and percentage.  Results: A total of 30,300 employed people were surveyed. The result shows that part-time workers have poorer health than full-time workers (c2 = 540.7155, p < 0.05), insufficiently wore protective gear (c2 = 24.8702, p < 0.05), had insufficient access to manuals on emotional expression (c2 = 27.7612, p < 0.05) and lacked information about risk factors (c2 = 185.0082, p < 0.05). Conclusion: Health and safety manager will need to have education and consultation, development of manual and perform an early intervention to improve safety environment as primary health care providers by understanding factors related to health and safety of part-time workers

The impact of proactive personality, economic rewards, and social exchange perceptions on knowledge sharing among engineers in a South Korean IT company

Over the decades, scholars have acknowledged the importance of knowledge sharing in organizational performance and innovation. Despite the importance of individual factors of knowledge sharing between employees, far too less attention has been paid to individual factors to promote individuals’ intention to share knowledge within organizations. The present study, focusing on the impacts of proactive personality, social and economic exchange perceptions on knowledge sharing, will have theoretical implications for researchers in human resource development (HRD) and management, as well as implications for practicing managers and administrators in organizations. This study examines whether impacts of individuals’ proactive personality and perceptions of social and economic exchange on sharing of knowledge between R&D engineers, which has been rarely explored in the literature. A mixed method using survey research and case study were conducted to test the study hypotheses. For a quantitative study, data were collected from 432 engineers engaged in R&D work at the high performance IT company in South Korea. The nature of their work required a significant reliance on co-workers. Multiple regression analysis, among other statistical techniques, was used to test the hypotheses and determine significant relationships. Of the factors examined in the study, the two factors found to have the strong effect on engineers’ knowledge sharing were proactive personality and social exchange perception. On the other hands, economic rewards was found to have a negative effect on knowledge sharing. For a qualitative study, case study was conducted through interview with selected R&D engineers. Two research questions were answered: (1) How do R&D engineers describe their knowledge sharing? And (2) What influence their knowledge sharing at work? Of the themes from the interview, the four found to show evidence in support of the results of quantitative study were social interaction, sense of duty, trust, and enjoyment. Several implications of these findings, limitations, and future research suggestions are discussed

Stability of hydrogenation states of graphene and conditions for hydrogen spillover

The hydrogen spillover mechanism has been discussed in the field of hydrogen storage and is believed to have particular advantage over the storage as metal or chemical hydrides. We investigate conditions for practicality realizing the hydrogen spillover mechanism onto carbon surfaces, using first-principles methods. Our results show that contrary to common belief, types of hydrogenation configurations of graphene (the aggregated all-paired configurations) can satisfy the thermodynamic requirement for room-temperature hydrogen storage. However, the peculiarity of the paired adsorption modes gives rise to a large kinetic barrier against hydrogen migration and desorption. It means that an extremely high pressure is required to induce the migration-derived hydrogenation. However, if mobile catalytic particles are present inside the graphitic interstitials, hydrogen migration channels can open and the spillover phenomena can be realized. We suggest a molecular model for such a mobile catalyst which can exchange hydrogen atoms with the wall of graphene.open151

The Effect of Repeated Ad Exposure and Physical Avoidance on Consumers’ Mobile Ad Response

Opt-in mobile advertisement platform services are increasingly popular. In this paper, we explore how repeated ad exposure and physical avoidance influence consumers’ responses to mobile ads. Using a unique panel-level data of 1,193,131 million users from Cash Slide, a Korean mobile advertising platform, we find that 1) repeated ad exposure and physical avoidance has a negative impact on a consumer’s response to mobile ads; 2) information richness in a mobile ad has a negative impact on mobile users’ response to ads; 3) the negative effect of a user’s repeated exposures to a mobile ad and physical avoidance increases in magnitude when the advertisement involves a context of higher information richness. Our finding bridges the gap in the extant literatures by examining the impact of repeated ad exposure and avoidance on consumers’ mobile ad response. Moreover, we provide practical implications to advertisers on the mobile platform

The Rhizome Mixture of Anemarrhena asphodeloides

We investigated the effect of DWac on the gut microbiota composition in mice with 2,3,6-trinitrobenzenesulfonic acid- (TNBS-) induced colitis. Treatment with DWac restored TNBS-disturbed gut microbiota composition and attenuated TNBS-induced colitis. Moreover, we examined the effect of DWac in mice with mesalazine-resistant colitis (MRC). Intrarectal injection of TNBS in MRC mice caused severe colitis, as well as colon shortening, edema, and increased myeloperoxidase activity. Treatment with mesalazine (30 mg/kg) did not attenuate TNBS-induced colitis in MRC mice, whereas treatment with DWac (30 mg/kg) significantly attenuated TNBS-induced colitis. Moreover, treatment with the mixture of mesalazine (15 mg/kg) and DWac (15 mg/kg) additively attenuated colitis in MRC mice. Treatment with DWac and its mixture with mesalazine inhibited TNBS-induced activation of NF-κB and expression of M1 macrophage markers but increased TNBS-suppressed expression of M2 macrophage markers. Furthermore, these inhibited TNBS-induced T-bet, RORγt, TNF-α, and IL-17 expression but increased TNBS-suppressed Foxp3 and IL-10 expression. However, Th2 cell differentiation and GATA3 and IL-5 expression were not affected. These findings suggest that DWac can ameliorate MRC by increasing the polarization of M2 macrophage and correcting the disturbance of gut microbiota and Th1/Th17/Treg, as well as additively attenuating MRC along with mesalazine

Chronic Mitral Valve Insufficiency in Dogs: Recent Advances in Diagnosis and Treatment

Chronic mitral valvular insufficiency (CMVI) is the most common acquired heart disease in dogs and is characterized by degenerative valvular changes causing progressive thickening of mitral leaflets and incomplete closure of mitral valve. As the disease progresses, it causes congestive heart failure (CHF) and pulmonary edema if the LA dilation cannot accommodate the volume overload by mitral regurgitation. Therefore, it is the most common cause of cardiac mortality in dogs. This chapter discusses general features of CMVI in dogs focusing on recent advances in diagnosis and treatment

Secure and Usable Bio-Passwords based on Confidence Interval

The most popular user-authentication method is the password. Many authentication systems try to enhance their security by enforcing a strong password policy, and by using the password as the first factor, something you know, with the second factor being something you have. However, a strong password policy and a multi-factor authentication system can make it harder for a user to remember the password and login in. In this paper a bio-password-based scheme is proposed as a unique authentication method, which uses biometrics and confidence interval sets to enhance the security of the log-in process and make it easier as well. The method offers a user-friendly solution for creating and registering strong passwords without the user having to memorize them. Here we also show the results of our experiments which demonstrate the efficiency of this method and how it can be used to protect against a variety of malicious attacks