As social media penetrates more deeply into people’s everyday lives, social commerce (a type of commerce that combines SNS features and possibility for commercial transactions) has enjoyed unprecedented growth. Shopping on Facebook is a representative example of social commerce platform that allows consumers to interact with other users, exchange information and purchase products without leaving a Facebook page. Social commerce presents great opportunities for marketers in terms of leveraging social aspects of shopping experience. It also offers a large potential for Korean companies to reach various target markets, as well as establish their presence abroad. Yet, acceptance of social commerce as a legitimate shopping channel has been slow, and consumers are still hesitant to shop via Facebook. This study draws on uses and gratification theory and the concept of perceived risk to examine how different motives for SNS use and the associated types of perceived risks can affect the purchase intention on the platform. Empirical data from 288 young users of Facebook were analyzed. Findings identified two main motives for SNS use: information-related motive and communication-related motive. Information-related motive significantly affected the intention to shop on Facebook, whereas communication- related motive did not have any significant influence. Risks associated with shopping via Facebook included delivery risk, security risk, social risk and economic risk. Overall, consumers perceived a higher level of security and social risk associated with shopping on Facebook. However, only social risk had a significant negative influence on the purchase intention. Awareness and previous experience of buying via social commerce platform positively affected consumers’ purchase intention.

Introduction There is ample evidence in the medical research literature to show that the harmful effects of smoking are real. As a result, most governmental agencies around the world attempt to discourage smoking among smokers and nonsmokers alike by requiring cigarette companies to print health-warning messages on their product packages as a means to deter smoking. Little, however, is known about the credibility of these cigarette-warning messages perceived by both smokers and non-smokers alike on the effectiveness of these messages. Other studies have also examined socio-psychological factors other than health warning messages such as peer pressure, bad breadth, et al., (Pechmann, et al, 2003) which can also influence consumer desires whether or not to smoke. No study to our knowledge has incorporated this factor other than just health warning messages in the same model to study this phenomenon. Furthermore, most research on this topic has focused on consumers in western industrialized countries, even though the issues related to smoking can be just as severe in developing countries and warrants more research attention. In this research, we propose to study the credibility of cigarette warning messages on the effectiveness of these messages on deterring smoking behavior and the mediating effects of the perceived health and social risks in an integrated structural equation model (SEM) framework in an emerging country- Turkey. The study should provide insights into how these factors may influence smokers and nonsmokers differently and enable public policy makers to institute programs or strategies targeting the two different segments of consumers. Literature Background and Hypotheses Copious research has reported on the efficacy of Health Warning Message (HWM) in the Health Communications and Marketing literature (for reviews see Hammond, 2011; Noar, et al, 2015; 2016). In the USA, current rules only require health warnings be printed with tiny fonts on cigarette packages. The effectiveness of this format to deter smoking has come into serious questions. Other countries including countries in the EU have long required pictorial depiction of health hazards resulting from smoking be printed on cigarette packages that must occupy a substantial portion (50% or more) of the surface area on the cigarette package. The assumption is that “a picture is worth a thousand words”. However, the results are equivocal at best (Sabbane, et al., 2009). The real impact of HWM continues to be a point for debate as there are other tobacco consumption reduction methods such as increased taxes and smoking bans (Ruiter & Kok, 2005) various governments can and have imposed. Previous research has shown that when consumers believe that smoking behavior leads to unhealthy consequences and is unwise and unattractive, they generally would refrain from engaging in this behavior (Azjen & Fishbein, 1980). However, consumers who think that they are invincible and that these health hazards will never affect them but only other people, may have engaged in the process of rationalization and may actually discount the credibility of these claims. If so, the HWM may become less effective (Kees, et al., 2006). We therefore formulate the following hypothesis: H1: Perceived credibility of HWMs increases the effectiveness of HWMs. On the other hand, the extent to which consumers may perceive that cigarette HWMs to be credible can better persuade them about the health and social risks such as yellow teeth, bad breath, bad smell, et al., leading to social rejection associated with smoking (Pechmann, et al., 2003). Hammond’s review article (2011) provided some evidence that size and the presentation format can enhance the believability of HWMs. We should expect then that a greater perceived credibility will lead to better persuasion. Similarly, Kowitt, et al. (2016) also show in their study that the believability of HWMs vary among the adolescents regarding cigar smoking. Again, the assumption is that if they perceive the messages to be more credible, they will be more effective in persuading them about the harmful effects of smoking. We thus formulate the following two hypotheses: H2: Perceived credibility of HWMs increases negative social risk perception of smoking H3: Perceived credibility of HWMs increase negative health risk perception of smoking Past research has revealed that knowledge about the negative consequences of a behavior can lead to behavior change even though this may be contingent upon how difficult it is to quit a behavior such as smoking (Nourjah, et al., 1994). Consumer behavior literature has confirmed that due to various factors, attitude may not correlate with behavior even in the context of smoking (Ruiter &Kok, 2005; Solomon, 2018). Extant literature suggests that HWMs may be more successful in influencing attitude (Cameron & Williams, 2015). This research focuses on the health risk perception’s potential impact on intention to quit smoking rather than the act of actually quitting smoking. Furthermore, as mentioned earlier, other factors such as smoking ban and price increases, et al. may cause smoking behavior change. Hence we present the following hypothesis: H4: Perceived health risks associated with smoking influence the effectiveness of HWMs. Smoking has become less socially acceptable in western industrialized countries in recent years. Many nations and states have now banned smoking in public places such as colleges, restaurants and airports including second hand smokes. This creates a social stigma for many smokers. Smokers, as a result, has to bear greater social risks these days. This may also cause them to develop a negative attitude toward smoking as well as reducing their intention to smoke (Chuang & Huang, 2012). As Turkey is a country whose citizens care more about social acceptance, we postulate the following hypothesis: H5: Perceived social risks of smoking affect the effectiveness of HWMs. As mentioned earlier, the effectiveness of HWMs may vary according to subjects’ responses to such messages. They may discount the message veracity by a process of rationalization or even by the extent to which they may have been addicted to the habit. This is so particularly for smokers who may have engaged in such behavior for a long time. Hence, one should expect these messages to be more persuasive and thus more effective in dissuading non-smokers from starting the habit. Smokers, on the other hand, are likely to remain unconvinced and view these messages as exaggerations and therefore less affected by these messages (Hammond, 2009; Hahn & Renner, 1998; Pechmann & Knight, 2002). Based on this discussion, we postulate that the impacts of HWMs’ credibility on perceived health and social risks, as well as the messages’ effectiveness will vary depending on the smoking status of the subjects. We expect greater impacts for non-smokers. Therefore, we tested the SEM for smokers and the same model for nonsmokers in this study. The model is shown in Figure 1 in the Appendix. MethodologyWe designed a four parts questionnaire to measure the constructs in the model we used in this study. In the first part of the questionnaire, we first presented the 14 HWMs currently required by law in Turkey to be displayed on cigarette packages. Furthermore, each of these messages is to be rotated on the packages. We then used the semantic differential scale items comprising of five bipolar adjectives derived from previous literature (Beltramini, 1988; Renee & Cameron, 2015) to measure the perceived credibility of HWMs: (1) believable- unbelievable, (2) convincing- unconvincing, (3) reasonable- unreasonable, (4) easy to understand- hard to understand, (5) informativeuninformative. In the second part of the questionnaire, we operationalized the effectiveness construct by asking the respondents to indicate the extent to which they perceived these HWMs as effective on a 1 item semantic differential scale: “HWMs motivate me to quit or not quit smoking” for smokers and “HWMs reduce my curiosity and desire to try smoking” for nonsmokers. In the third part of the questionnaire, we measured health and social risks perceptions by using 4 statements. Respondents were asked to indicate their agreement/disagreement with each of the 5- point Likert scales culled from Kim (2006): Smoking makes me “contract various diseases and become addicted (health risks); Smoking makes me look “stupid, filthy (social risks). The last part of the questionnaire asked respondents about their smoking status and demographics including age, gender and the level of education. We collected the data by posting a copy of the questionnaire online on a website dedicated to discussing higher education issues in Turkey (www.akademikpersonel.org). We obtained an effective sample size of 432 after removing those with incomplete answers. Male and female respondents constituted 50 % of the sample each. The largest percentage of respondents was in the age group of 17 to 22 (35 %). Respondents (249) who have achieved the level of a college undergraduate degree or equivalent on education constituted 58 % of the sample. We conducted Chi-sqaure analyses to test significance of demographic differences between the two groups of smokers and nonsmokers. The results revealed no significant differences on age (χ2/3df=4.83; p=0.185), gender (χ2/1df=2.70; p=0.123) and the level of education (χ2/2df= 0.873; p= 0.646) between the smoking and nonsmoking subsamples. ResultsWe used WarpPLS 5.0 to conduct the structural model analyses as this analysis tool does not require the data set to be normally distributed (Kock & Lynn, 2012). We first tested the measurement scales with respect to their convergent and discriminant validities through standardized factor loadings. We conducted an Exploratory Factor Analysis (EFA). We eliminated two items on the credibility scale, which did not reach at least 0.5 on factor loadings for both subsamples. The two remaining items are “believable” and “convincing”. We then evaluated reliabilities of the scales for both subsamples, results for both subsamples showed that both credibility and health risk scales achieved Cronbach’s α scores higher than 0.7. Even though the Cronbach α score for the two items scale to measure social risk only reached a value of 0.6 for each of the subsample, this is considered adequate due to the smaller number of items used (Field, 2013). We assessed the assumptions of PLS-SEM. Variance inflation factors (VIFs) are well below the recommended 3.30. Hence, both vertical and lateral collinearity assumptions were met, thus deemed to be free from the common method bias (Kock & Lynn, 2012). We then evaluated convergent and discriminant validities of the latent construct. Discriminant validity was achieved as the square roots of AVE (average variance extracted) scores were higher than and correlation of the factor with another measure (Fornell & Larcker, 1981). For each subsample, composite reliabilities of all factors were higher than 0.8 and indicators’ loadings higher than 0.5 on the latent constructs. Thus, all scales used in the model achieved convergent validities for each subsample. We then proceeded to test the structural model for each of the subsamples. The results showed that for nonsmokers, the model explained 12% of total variance in the effectiveness of HWMs and for smokers 33%. All path coefficients were significant for nonsmokers except the health risks → HWMs effectiveness (β= 0.05, p= 0.23). Other path coefficients all showed significance as follows: perceived credibility of HWMs → perceived health risks (β= 0.154, p= 0.01), perceived credibility → perceived social risks (β= 0.148, p= 0.014), perceived credibility of HWMs → perceived effectiveness (β= 0.285, p < 0.01) and perceived social risk → perceived effectiveness (β= 0.148, p < 0.014). For the smokers’ subsample, the path coefficient between the perceived health risks and effectiveness was also shown to be non-significant (β= 0.06, p= 0.19). All other path coefficients all showed significance as follows: perceived credibility of HWMs → perceived health risks (β= 0.197, p < 0.01), perceived credibility → perceived social risks (β= 0.247, p< 0.001), perceived credibility of HWMs → perceived effectiveness (β= 0.503, p < 0.001) and perceived social risk → perceived effectiveness (β= 0.213, p < 0.001). These results confirmed H1, H2, H3 and H5 but not H4 for both smokers and nonsmokers. Discussion and Conclusion This study reveals some useful insights about how HWMs on cigarette packages may influence smokers and nonsmokers differently in an emerging country- Turkey, which can be used by public policy makers to formulate effective anti-smoking campaigns to target the two groups. The effect sizes appeared to be greater for smokers than nonsmokers. This suggests that if these HWMs can be crafted to be perceived as more credible, the smokers can be more persuaded to quit smoking than for nonsmokers to start smoking. These results appear to be consistent across the board whether we are considering the direct effect or indirect effects through the mediating variables. This is perhaps somewhat consistent with what we would expect based on our earlier discussions. Smokers may be more resistant to HWMs due to the fact they are already engaged in such behavior and therefore more likely to discount the messages as well as the associated health and social risk perceptions. For nonsmokers, on the other hand, it may not take as much to convince them about the harmful effects of smoking and therefore greater perceived credibility of HWMs may be less critical in persuading them not to start smoking. It is important then when designing such HWMs to consider carefully whether these messages are perceived to be credible. Some of the US cigarette warning messages printed in tiny scripts are ambiguous such as smoking can be harmful to your health clearly can not be expected to be highly credible. Research has also shown that pictorial messages can be more persuasive. However, research has also shown that the results are far from being conclusive (Sabbane, et al., 2009). More research is warranted, especially in emerging countries. It is also interesting to note that social risks perceptions are more persuasive than health risks perceptions. Future communications strategies should place a greater emphasis on this factor and not just on health risks. Limitations and Suggestions for Further Research Although our study is able to provide some useful insights into how perceived credibility of HWMs can influence the effectiveness in deterring smoking among nonsmokers and smokers alike either directly or indirectly through perceived health and social risks, we would like to point out several limitations of this study. First, we collected our data online using a web portal in Turkey that focuses on discussing higher education issues in general and therefore the respondents’ level of education is higher than the general population as well as the age group being younger. Future study should collect data from other age groups and education levels to produce results that are more generalizable. We conducted our study in one emerging country- Turkey. In future studies, more countries should be included. As the results revealed the prominence of social risks over health risks in influencing the effectiveness of anti-smoking campaigns, the issue about how to promote the social wellbeing of not smoking (promotional) versus the health risks aspects of the campaign warrants further research.

The authors propose that consumers’ shopping styles influence online perceived benefits and risks in online shopping. An empirical test of the models provide support for the majority of the hypothesized relationships and a better understanding of the effects of consumers’ shopping on perceived benefits and risks in online shopping.

This study examined the risk components and risk types perceived in the context of purchasing decisions of paper fashion products. This study also identified the levels of perceived risk by consumers and the differences between age groups in risk perception. First, qualitative data were collected through a focus group interview with 7 Korean females in their 20s to 50s. The interviewees were presented with two types of paper materials (undyed and dyed Jumchi-Hanji) and products (bags and wallets) made with the papers. The interviewees mentioned 11 risk components which were classified into five types of risks: performance (easily torn/lack of durableness, lint/pilling/wear-out, lack of water-resistant, no washability, and deformation and discoloration over time), social-psychological (old and traditional image), aesthetic (lack of design diversity, unsatisfactory appearance due to repair), financial (expensive price, lack of usability in daily life) and time/convenience (difficulty in handling) risks. Based on the results of the interview, a measurement for evaluating the risk perception of paper fashion products was developed. Second, quantitative data were collected from 64 Korean women in their 20s to 50s using the measurement. Respondents who were presented with the paper materials and the products perceived the performance risk more strongly than the social-psychological risk and aesthetic risk. In addition, differences between age groups were found: younger respondents perceived performance risk and social-psychological risk more strongly than older respondents, but older respondents perceived financial risk more than younger respondents. Based on this study, strategies for the risk reduction of paper fashion products were proposed.

Bisphenol A (BPA), known as a typical endocrine disruptor, has been used commercially and widely for plastics and epoxy resins. BPA-based plastic is used extensively for the production of water bottles, food containers, CDs, DVDs, and panels that can be applied in construction. Epoxy resins containing BPA are used for coatings on the insides of water pipes, food cans, and thermal papers that are used in sales receipts. As its estrogenic effects and other adverse health effects have published, BPA has been regulated in many countries, and there have been efforts made to replace BPA. Other bisphenols substitutes such as bisphenol S (BPS) and bisphenol F (BPF) have been used. Currently, BPS- and BPF-based products labeled BPA-free products have been widely consumed. Because of structural similarities with BPA, however, these alternatives also show endocrine disruption effects like BPA, and many studies on adverse health effects of these alternatives are being reported. In this review, we describe the adverse health effects of bisphenols and the current status of regulation.

Selecting suppliers in the global supply chain is the very difficult and complicated decision making problem particularly due to the various types of supply risk in addition to the uncertain performance of the potential suppliers. This paper proposes a multi-phase decision making model for supplier selection under supply risks in global supply chains. In the first phase, the model suggests supplier selection solutions suitable to a given condition of decision making using a rule-based expert system. The expert system consists of a knowledge base of supplier selection solutions and an “if-then” rule-based inference engine. The knowledge base contains information about options and their consistency for seven characteristics of 20 supplier selection solutions chosen from articles published in SCIE journals since 2010. In the second phase, the model computes the potential suppliers’ general performance indices using a technique for order preference by similarity to ideal solution (TOPSIS) based on their scores obtained by applying the suggested solutions. In the third phase, the model computes their risk indices using a TOPSIS based on their historical and predicted scores obtained by applying a risk evaluation algorithm. The evaluation algorithm deals with seven types of supply risk that significantly affect supplier’s performance and eventually influence buyer’s production plan. In the fourth phase, the model selects Pareto optimal suppliers based on their general performance and risk indices. An example demonstrates the implementation of the proposed model. The proposed model provides supply chain managers with a practical tool to effectively select best suppliers while considering supply risks as well as the general performance.

The rapid growth of engineering technology and the emergence of systemized and large-scale engineering systems have resulted in complexity and uncertainty throughout the lifecycle activities of engineering systems. This complex and large-scale engineering system consists of numerous components, but system failure can be caused by failure of any one of a number of components. There is a real difficulty in managing such a complex and large-scale system as a part. In order to efficiently manage the system and have high reliability, it is necessary to structure a system with a complex structure as a sub-system. Also, in the case of a system in which cause of failures exist at the same time, it is required to identify the correlation of the components lifetime and utilize it for the design policy or maintenance activities of the system. Competitive risk theory has been used as a theory based on this concept. In this study, we apply the competitive risk theory to the models with combined structure of series and parallel which is the basic structure of most complex engineering systems. We construct a competing risks model and propose a mathematical model of net lifetime and crude lifetime for each cause of failure, assuming that the components consisting a parallel system are mutually dependent. In addition, based on the constructed model, the correlation of cause of failure is mathematically analyzed and the hazard function is derived by dividing into net lifetime and crude lifetime.

PURPOSES :In this study, we analyzed the road crossing behavior of older pedestrians on a mid-block signalized crosswalk, and compared it to that of younger pedestrians. In addition, we analyzed the correlation between accidents involving older pedestrians while crossing roads and their behavioral characteristics. Finally, we confirmed the reasons for an increase in accidents involving older pedestrians.METHODS :First, 30 areas with the highest incidence of accidents involving older pedestrians while crossing roads were selected as target areas for analysis. Next, we measured the start-up delay (the time elapsed from the moment the signal turns green to the moment the pedestrian starts walking) and head movement (the number of head turns during crossing a road) of 900 (450 older and 450 younger) pedestrians. The next step was to conduct a survey and confirm the differences in judgment between older and younger pedestrians about approaching vehicles. Finally, we analyzed the correlation between the survey results and traffic accidents.RESULTS :The average start-up delay and head movement of the older pedestrians was 1.58 seconds and 3.15 times, respectively. A definite correlation was obtained between head movement and the frequency of pedestrian traffic accidents. The results of our survey indicate that 17.3% of the older pedestrians and 7.8% of the younger pedestrians have a high crash risk.CONCLUSIONS :Behavioral characteristics of older pedestrians were closely correlated with accidents involving older pedestrians while crossing roads in mid-block signalized crosswalks. Our study indicates that in order to reduce the number of accidents involving older pedestrians, it is necessary to develop an improvement plan including measures such as installation of safety facilities taking the behavioral characteristics of older pedestrians into consideration and their safety education.

한국에서 말라리아는 1993년에 다시 등장했으며, 이후 증감을 반복하며 공간적 변화를 거듭하여 왔다. 지리 공간의 인문·자연·지리적 요인들은 복잡하게 상호작용하여 매개 모기의 생태와 말라리아 발생에 영향을 미친다. 본 연구는 말라리아의 발생 양상을 이해하고 이를 조절하는 데 기여하고자 그 공간적 패턴을 분석하였다. 본 연구는 Getis-Ord의 Gi* 와 평균 중심점을 이용하여 2001년부터 2014년 사이 말라리아 발생의 공간적 분포를 탐색적으로 분석하여, 그 시공간적 변화를 파악하였다. 또한 일반화 포아송 회귀모형을 이용하여 2001년, 2014년 말라리아에 영향을 미치는 인문·환경 요인을 비교·분석하고, 군사분계선으로부터의 거리 변수를 이용하여 그 공간적 자기상관을 설명하고자 하였다. 그 결과, 소 두수, 표준공시지가, 성비, 아파트 비율, 군사분계선 거리, 기후 요소, 논 비율이 말라리아 발생에 영향을 미치는 유의한 변수로 확인되었다.

본 연구의 목적은 새로운 사고의 위기가 국내 해양안전에 미치는 영향을 분석하기 위함이다. 새로운 사고 위기는 세계 해상운송에서 새롭거나 드물게 또는 예측하지 못한 사건들로부터 유추한 것으로 사전 연구에서 46명의 전문가를 통해서 식별한 것이다. 새로운 해양사고의 위기를 식별하기 위하여 해양안전심판원(KMST)의 통계 데이터를 계산에 사용하였고, IMO의 공식안정성평가기법인 위기지수(RI) = 빈도지수(FI) + 심각성지수(SI)의 개념을 계산에 적용하였다. 통계적인 사고 데이터로부터 FI와 SI의 가중치를 계산한 후 가장 순위가 높은 시나리오를 식별하고 새로운 사고 위기와 시나리오 사이의 관계를 분석하였다. 분석 결과, 가장 순위가 높은 시나리오의 근본적인 원인은 “첨단기술 개발”이었고, 그 결과 “화물 작업 시간 단축”이 발생하는 것으로 나타났다. 이러한 결과는 사전 연구에서 46명의 전문가에 의해 식별한 “영업 경쟁” 및 “선원 문제” 등과 차이가 있음을 보였다.

The key features of maritime accidents are the change of their attributes by new risks from time to time. To prevent maritime accidents in Korea, the impacts by new risks on domestic safety environments should be identified or predicted. The purpose of this paper is to find the hazard factors by new risks on maritime safety in Korea. The meaning of new risks is the elements of accident hazard which is compiled from new or rare or unprecedented events in the worldwide maritime transportations. The problems of new risks are the lacks of optimum countermeasures to mitigate accident risks. Using the questionnaires with 152 event scenarios classified by 20 accident causes, the hazard identification and risk analysis of new risks was performed based on the Formal Safety Assessment (FSA) by IMO. A total of 22 Influence Diagrams, which is to depict the transit flows between accident causes to consequences, is used in the construction of 152 event scenarios. A total of 20 accidents causes is the same contents as the causation factors represented in Statistical Year Book for Maritime Accidents of Korean Maritime Safety Tribunals. After defining the evaluation equations to the response results of questionnaires by 46 experts, the work for risk analysis is carried out. As results from the analysis of 152 scenarios, it is known that the root cause to affect on maritime safety in Korea is the pressure of business competition and it led to the lacks of well experienced crews, the overload of vessel operations and crew's fatigue. In addition, as results from the analysis of 20 accident causes, the three accident causes are to be candidate as main issues in Korea such as the inadequate preparedness of departure, the neglecting of watch keeping in bridge and the inadequate management of ship operations. All of the results are thought to be as basic hazard factors to safety impediments. It is thus found that the optimum Risk Control Options to remove the hazard factors and to mitigate consequences required are the following two factors: business competition and crewing problems.

This study aims to examine the risk of electrical fire in places where electric heat wires are used. In general, the use of electric heating wires is becoming more common and prevalent in a bid to prevent increasing damage caused by freezing and bursting in residential water pipes, factory pipes and irrigation pipes in vinyl greenhouse and a variety of heat wire products are available in market with legal safety requirements imposed on them. However, the widespread use of anti-freezing burst heat wire products has caused increasing incidents of fire, which often fail to be incorporated into statistics due to quick onsite extinguishing and insignificant damage although damage is gradually on the rise. Against this backdrop, this study aims to look into the possibility of ignition caused by electric heat wires and the mechanism of how it turns into catching fire through overheat and short circuit tests for anti-freezing burst electrical heat wires (hereinafter called the ‘heat wire’) and expects to serve as the basis for further observations and analyses on the cause of fire and the process of ignition in a scientific manner.

1. 가뭄저항성 작물의 내건성 검정 및 위해성 평가에 활용하고자 가뭄모의시설을 구축하였다.2. 선행연구조사를 통해 가뭄모의시설은 토양으로 유출입되는 물을 조절할 수 있는 토양저장부와 강우 센서의 감지에 의해 자동으로 개폐가 되는 비가림막으로 구성하였다. 3. 시설은 적정관수구와 가뭄처리구로 나누어 식물체의 재배실험을 수행하였으며, 각 처리구의 토양수분함량의 변화와식물체의 표현형질의 분석을 통해 본 시설이 가뭄환경의 조성을 용이하게 조절함을 확인하였다.

This study empirically examines how much effect levels of fatigue and stress of a construction worker have on disaster risks from the perspective of human factors concerning construction disaster risks. To achieve the purpose of this study, a survey was conducted with respect to construction workers working at large construction sites within the metropolitan area. The retrieved survey data were analyzed by using the statistical software programs, SPSS 18.0 and AMOS 8.0. The results of this study do not definitively lead to the conclusion that the level of fatigue or stress of construction workers result in disaster risks. However, it does show that the results vary depending upon the individual approach and treatment of stress and fatigue. In particular, this study revealed that disaster risk levels could increase through unsafe behavior intentions which were established as a mediator variable. Also, with respect to unsafe behavior intentions of construction workers leading to disaster risks, when examining the results that the level of mental fatigue, occupational stress and social-psychological stress of construction workers had a greater significant effect than the level of physical fatigue, this study demonstrates the importance of psychological and mental issues that could be easily overlooked with respect manual labor workers.

본 연구에서는 질병 데이터를 활용한 사망률의 지도화에서 지역별 사망률의 변동성을 안정화할 수 있도록 하는 베이지언 기법을 적용하고, 기본적으로 활용되고 있는 SMR (Standardized mortality ratio)과 그 결과를 비교하였다. 우리나라 전국의 시군구 단위의 전립선암 사망자 수 데이터에 표준화와 베이지언 기법을 적용하고, 산출된 사망률을 지도화하여 기존에 없던 우리나라의 전립선암 사망률 지도를 질병 지도의 예시 자료로 작성하였다. 분석 결과, Bayesian 모델링 기법을 통해 계산된 위험비는 기존 SMR에 비해 좀 더 수렴된 형태의 안정적인 통계량을 가지는 것을 알 수 있었다. 국지적 Bayesian 기법은 이웃 지역들의 정보만을 반영하여 위험비를 평활화하기 때문에 본 연구에서 사용된 전역적 기법들과 비교할 때 평활화의 강도가 크지 않았다.

This study aimed to identify the recognition of fire risks on their field operations among firefighters and contribute to setting up safety measures accordingly. A self-administered questionnaire were used to evaluate their recognition of job risks. About 93.4% of respondents answered they have exposed to job risks and 73.4% answered that they had high safety awareness. Our study showed that the lower service years and ranks the fire officers had, the lower relevance in statistics their awareness of the risk of the field operations and safety concerns had. The vulnerable group is those aged 20 to 39, with under 10 years of service, at a lower rank of senior fire sergeant. The study suggests coming up with the measures to motivate the officers to perform safe operations by improving their safety awareness.

Food contact packaging material should be stable and non-reactive with the food that it is in contact with, and must promote the safety of food. However, for a number of years, there has been evidence that indefinitely small amounts of chemicals could migrate or leach from food packaging materials into the foods they hold. The chemistry and toxicity of such leachates are well-known and documented; and there is a growing concern over the matter among the general public. In addition, food regulatory agencies are imposing more stringent regulations on the maximum allowable amounts of known leachates into foods in recent years. The majority of toxicity studies have revealed that trace amounts of leachates pose no immediate health problems in humans. However, studies on the effects of long-term exposure or synergistic/cumulative toxicity are still lacking. The present review provides an overview of the chemical nature and toxicity of certain leachates from various types of food contact packaging materials that are in wide use.