No abstract

These substantial works are typically reflected in the different definitions of bullying and are adapted by other nations where pre-existing theories on bullying have not yet been established. Furthermore, methods of investigating bullying (e.g. selfreports and peer nominations of victimisation), in particular the questionnaire developed by Olweus (1978Olweus ( , 1993, have been widely acknowledged and used in many countries.While not denying the validity of Owleus's questionnaire for investigating bullying, we must ask how the popular questionnaire and the definition that was used for the questionnaire can explore the unique features of bullying phenomena in different cultures. We should also consider that whether or not bullying has manifested itself in the same form and/or definition in a given nation over a period of time. If not, we should question how it has changed and evolved. These are very important issues since the final goal of studying bullying is to reduce its incidence and to prevent further potential problems (e.g. subsequent delinquency). Thus, there must be a significant amount of accumulated information which can reflect how the behaviour has been developed since earlier times. Studying the forms and A Time Line of the Evolution of School Bullying in Differing Social Contexts Hyojin KooWoosuk University KoreaThe aim of this present study is to expand our general understanding of bullying behaviour and to advance our knowledge about bullying among pupils. As evidenced by historical documents, the phenomenon of bullying is not a new concept. The fact that some people are frequently and systematically harassed or attacked by others is described in literary works and it also has been found most realistically in schools. Overall, considerable examples of bullying incidents among young people in earlier times have been found out through this study. In earlier times, according to descriptions in old documents from the 18 th to early 20 th centuries, bullying was generally described as physical harassment that usually related to a death, strong isolation, or extortion in school children. However, in contrast to the forms of bullying in earlier times, and the first descriptions of bullying as one or a few physically strong boys directly and harshly treating weaker ones, bullying in modern contexts includes more psychological and verbal threatening as well. Moreover, the meaning and forms of bullying has been expanded and developed as including mean gestures and facial expression, gossiping, and spreading rumours.

No abstract

Objectives: Ginsenoside Rg1 and mebicar have been reported to have broad efficacy spectrum, including anti-anxiety and anti-stress. These drugs have been used not only for treatment but also for the purpose of increasing resistance from disease. A specific aim of this study was to investigate whether mebicar or ginsenoside Rg1 can prevent physiological changes resulting from intermittent unpredictable stress (IUS). Methods: Seven week-old Balb/cByJ mice were administered orally with mebicar (10 mg/kg) or ginsenoside Rg1 (10 mg/kg) starting from a week before they were exposed to IUS until the end of the experiment. IUS, which consists of psychological stress and physical fatigue, was set as 3 bouts (24 h/bout) exposure in a 2-week period. Results: IUS caused hyperactivity and anxiety-like behavior, which were not inhibited by mebicar or ginsenoside Rg1. IUS mice treated with mebicar or ginsenoside Rg1 recovered rapidly from anxiety-like behavior induced by the multiplexed stress compared to the mice not orally treated with mebicar or ginsenoside Rg1. Mebicar or ginsenoside Rg1 could not prevent the decrease of brain-derived neurotropic factor by IUS exposure. However, mebicar or ginsenoside Rg1 prevented elevation of serum corticosterone and secretion of proinflammatory cytokines from splenocytes due to IUS exposure. Conclusions: This study suggests that mebicar or ginsenoside Rg1 may have little preventive effect on neurobehavioral disruption by IUS exposure, but mebicar or ginsenoside Rg1 shortened the lasting duration of the anxiety caused by exposure to a novel environment. The anti-stress effect of mebicar and ginsenoside Rg1 may be restricted in peripheral stress responses.

This study suggests that a G-LOC detecting and warning system may be a customized, real-time countermeasure by improving the accuracy of detecting G-LOC.Kim S, Cho T, Lee Y, Koo H, Choi B, Kim D. G-LOC warning algorithms based on EMG features of the gastrocnemius muscle. Aerosp Med Hum Perform. 2017; 88(8):737-742.