This study examines factors influencing occupational injuries among plant and machine operators using the Semi-supervised MarginBoost algorithm. Data from the 2007-2009 Korean National Health and Nutrition Examination Survey (KNHANES) were analyzed, covering 4,062 employed participants. The MarginBoost model achieved 84.3% accuracy, outperforming other models. Key factors identified included exposure to hazardous substances, ergonomic conditions, and psychosocial stress. The findings emphasize the need for targeted interventions to enhance workplace safety and offer a robust predictive tool for the effective management of occupational health.

To address the English proficiency of underachieving college students, universities often use in-house language tests. C University lacks specific exams for identification, and relies on students’ English performance in the Korean College Scholastic Aptitude Test (CSAT English). This research explores the potential of the TOEIC Bridge, a standardized English proficiency test developed for middle and high school students, to provide an effective, practical measure for screening underachieving students in English. The study investigates the relationship between TOEIC Bridge and CSAT English performance, evaluating the predictive value of TOEIC Bridge on CSAT outcomes. Analyzing data from 418 students, the study identified (1) a moderate correlation between TOEIC Bridge and CSAT English performance, and (2) predictability of CSAT English performance based on TOEIC Bridge, suggesting that TOEIC Bridge can provide a potential tool to identify underachieving students in English. These findings contribute pedagogical insights for tertiary education.

This study presents a fine scale distribution of the endangered species, Odontobutis obscura, through field surveys and literature reviews. Using the mark-recapture method, the population size in major habitats was determined. Field surveys conducted on 18 streams in Geoje Island revealed that the O. obscura was only found in the main streams and tributaries of the Sanyang, Gucheon, and Buchun Streams, which are part of the Sanyang Stream watershed. The O. obscura exhibited relative abundances ranging from 0.5% to 35.3% at different locations, with certain spots showing higher relative abundances (18.8% to 35.3%), indicating major habitat areas. A review of six literature studies confirmed the presence of the O. obscura, although there were differences in occurrence status depending on the purpose, scope, and duration of the studies. Combining the results of field and literature surveys, it was found that the O. obscura inhabits the main and tributary streams of the Sanyang, Gucheon, and Buchun Streams, from the upper to lower reaches. Currently, the O. obscura population in the Sanyang Stream watershed maintains a stable habitat, but its limited distribution range suggests potential issues such as genetic diversity deficiency in the long term. The population size of the O. obscura was confirmed at two specific locations, with densities of 0.5 to 1.5 individuals per m2. The average movement distance from the release point was 13.1 m, indicating the limited mobility characteristic of ambush predators. Understanding the distribution and population size of endangered species is the first step towards their conservation and protection. Based on this information, further research could significantly contribute to the conservation of the O. obscura.

Working with molten metal has always been and will always be a dangerous workplace. No matter how carefully equipment is designed, workers are trained and procedures are followed, the possibility of an accident can occur in melting workplace. Some primary causes of melt splash and furnace eruptions include wet or damp charge material, dropping heavy charge into a molten bath, wet or damp tools or additives and sealed scrap or centrifugally cast scrap rolls. Induction melting brings together three things (water, molted metal and electricity) that have the potential for concern if the furnace is not properly working. Induction furnace must have a water cooling system built into the coil itself. Water picks up the heat caused by the current as well as heat conducted from the metal through the refractory. The water carries the heat to a heat exchange for removal. Spill pits serve to contain any molten metal spilled as a result of accident, run out or dumping of the furnace in an emergency. If a leak is suspected at any time, cease operation and clear the melt deck area of all personnel and empty the furnace. Molten metal fins can penetrate worn or damaged refractory and come into contact with the coil. A furnace or a close capture hood which suddenly swings down from a tilted position will cause injury or death. Whenever workers are working on a furnace or close capture hood when it is in the tilted position, be sure that it is supported with a structural brace that is strong enough to keep it from dropping if hydraulic pressure is lost. In theory refractory wear should be uniform, however, in practice this never occurs. The most causes of lining failure are improper installation of refractory material, inadequate sintering of refractory material, failure to monitor and record normal lining wear, allowing the lining to become too thin, installation of the wrong refractory, improper preheating of a used cold lining, failure to properly maintain the furnace the sudden or cumulative effects of physical shocks or mechanical stress, and excessive slag or dross buildup. Pouring cradles provide bottom support for crucibles. A crack in the crucible occur below the bottom ring support, the bottom of the crucible can drop and molten metal will spill and splash, possibly causing serious injury or death. To reduce this danger, a pouring cradle that provides bottom support for the crucible must be used. Power supply units must have safety locks and interlocks on all doors and access panels. Workers who work with low voltage devices must be made aware of the risk posed by high levels of voltage and current. The most causes of accidents are introduction of wet or damp material, improper attention to charging, failure to stand behind safety lines, coming into contact with electrically charged components and lack of operator skills and training. Only trained and qualified personnel are to have access to high risk areas. Safety lockout systems are another effective measure to prevent electrical shock

Microphysogobio rapidus is designated as endangered species class I by Ministry of Environment, and its distribution and population have been gradually declining, and it is now limited to the Nam River and some tributary streams of the Nakdong River Watershed. For the restoration of this highly endangered species, it is important to identify the causes of the decline and establish appropriate restoration plans. However, due to lack of basic data and ecological research, most steps are stagnant. Therefore, in this study, we identified the differences in the physical, biological, and sociological habitats between current and past distributed sites through field surveys and literature reviews. As a result of the field survey, there were differences in conductivity between the current and past distributed sites, and fish communities were also showed differences. The literature data also showed that the physico-chemical values of the past distributed sites were generally unfavorable, which generated negative consequences on biological factors. In particular, the effects of urbanization were found to be a major factor affecting the habitat of M. rapidus. Habitat stabilization is crucial for the recovery of this endangered species. However, in the past distributed sites, disturbances such as stream development and weir construction have altered streams physico-chemically and result in changes of M. rapidus. Therefore, a comprehensive plan that considers both stream connectivity and water quality is needed to manage and restore the habitat of M. rapidus.

본 연구에서는 생물다양성협약(CBD) 글로벌 보전목표(K-M GBF)의 핵심이라고 할 수 있는 실천목표 3(30by30)에 대한 우리나라의 효과적 대응 방향을 모색하기 위한 것으로, OECM에 대한 글로벌 개념 고찰 및 전문가 인식조사를 통해 국가 차원의 체계적인 OECM 발굴방향을 모색하고자 하였다. 글로벌 표준을 준수하되 한국적 맥락을 반영한 국가 차원의 체계적인 OECM 발굴방향을 모색을 위해 본 연구에서는 ①OECM 관련 한국적 용어 사용, ②글로벌 표준을 반영한 결정인자(criteria) 도출, ③우리나라 잠재 OECM 후보 유형 도출, ④OECM 발굴‧보고 시 고려사항 등을 검토하였다. 먼저 OECM의 단순 번역어 사용이 아닌 이의 개념을 잘 반영한 ‘한국적 용어’ 사용에 대한 공감대 형성이 있었으며, 가장 선호되는 용어이자 ‘자연과 조화로운 삶’이라는 생물다양성협약(CBD) 2050 비전과도 그 맥락을 같이하는 ‘자연공존지역 (12명)’이 타당한 것으로 나타났다. 글로벌 표준을 반영한 주요 결정인자로는, 1단계 선별과정에서 OECM 핵심 특성을 반영한 4개 결정인자(1. 보호지역 여부, 2. 지리적 경계, 3. 거버넌스‧관리, 4. 생물다양성 가치)를 활용하고, 개별지역 심층진단을 수행하기 전에 관리‧관할기관 등과의 공감대형성(2단계) 과정을 거친 후 3단계(발굴‧보고단계)에서 2가지 결정인자(3-1 거버넌 스와 관리의 효과성과 지속성, 4-1의 생물다양성 가치의 장기적 보전성과)를 추가하여 심층 진단을 수행하는 방향을 제시하였다. 본 연구에서 살펴본 28개 유형은 대체적으로 OECM 부합성이 높은 것으로 나타났으며(4.45~6.21점/7점, 평균 5.24점), 특히 자연환경국 민신탁의 보전재산(6.21점) 및 보전협약지(6.07점)가 OECM 개념에 가장 잘 부합할 것으로 나타났다. 이어 세계자연유산 완충구역(5.77점), 사찰림(5.73점), 개발제한구역(5.63점), 비무장지대(5.60점), 생물권보전지역 완충구역(5.50점) 등이 잠재성이 높은 것으로 나타났다. 절대보전무인도서의 경우 보호지역에 부합한다는 응답(5.83/7점)이 OECM 부합성(5.52/7점) 보다 더 높게 나타나, 향후 절대보전무인도는 그 주변해역(1㎞)과 더불어 한국보호지역데이터베이스(KDPA)에 등재를 추진하는 것이 바람직할 것으로 판단된다. OECM 관련 글로벌 표준 검토 및 전문가 인식조사 결과를 토대로, 한국적 맥락의 OECM 발굴시 고려사항으로 10가지를 제시하였다. 향후 이러한 고려사항을 참고하여 단계적인 발굴사업을 통해 OECM을 목록화하고 기존 보호지역과의 연계를 통한 국가 차원의 현지-내 보전체계 정립을 위한 지속적인 연구가 필요할 것으로 판단된다.

Digital technology has been increasingly applied in the traditional tourism forms, including the heritage tourism. However, the role of technology and tradition for attracting tourists in industrial heritage tourism destinations has not been clearly identified. To narrow the research gaps, this study adopted a two stage study, based on grounded theory and factor analyses. In Study 1, through the data analysis of 60 in-depth interviews, 10 stimuli factors in 3 categories were identified. In Study 2, a questionnaire was developed based on the results of Study 1, through exploratory factor analysis (EFA) and confirmatory factor analysis (CFA), we established and tested a model of on-site stimulus factors. Findings can deepen the understanding of industrial heritage tourism from a tourist perspective and offer practical implications.

Measuring service quality and related key dimensions has been an important problem in Marketing. In this research, we would introduce a smart methodological framework to efficiently identify refined, key sentiment dimensions for measuring the service quality using both traditional survey and unstructured online reviews (natural survey). The proposed framework consists of three parts: (1) steps for preprocessing the unstructured reviews to generate attribute-level sentiments for independent variables (2) Bayesian regression to efficiently identify key groups of correlated attributes and (3) post-hoc analysis for identifying dimensions from the selected groups of correlated attributes and predicting dimension-level effects. Note, the first part of the framework (i.e., preprocessing) is not required for analyzing traditional surveys. Our framework provides two sets of complementing results such as attribute-level effects under the identified dimensions and aggregate dimension-level effects. In the first application study to traditional SERVQUAL data, we successfully validated the proposed framework by comparing the results between our framework and three commonly used existing methods of regression, lasso regression, and factor analysis. In the second empirical application study with the online reviews from a major game review website, STEAM platform, we found that our framework provided a significantly reduced number of key dimensions which were surprisingly efficient for predicting and explaining the service quality ratings, compared with the same set of compared methods in the first study plus the topic model. In particular, with reviews of 2,825 games, three key dimensions of Mechanical playability, Fun in fantasy and Money for value were identified, and we also found that the Mechanical playability could be an important driver of game popularity.

The impact of firms' marketing communication on word of mouth (WOM) has been studied extensively in recent years, with a growing focus on electronic word of mouth (eWOM). The advent of the internet and the participatory web or Web 2.0 has dramatically changed the relationship between marketers and consumers, with consumers playing a more active role. However, there is a gap in understanding this area, including a lack of research on identifying specific groups of consumers that companies should focus on for eWOM marketing. Eye-tracking techniques have been suggested to address this issue, but these methods can be costly and rely on lab-based observations. Analyzing unstructured data from consumer-to-consumer interactions on social media is an underutilized approach in current marketing literature. The authenticity of eWOM is a highly valuable trait, but there can be a tension between commercial and communal norms, even in relatively informal settings like a blogger endorsing a product.

The paper aims to identify place names in illustration titles in John Nieuhoff’s An Embassy from the East-India Company of the United Provinces, to the Grand Tartar Cham Emperour of China (English in 1669, Dutch in 1665). Nieuhoff’s text was very popular with the 17th century European public. After its first publication in Dutch it was translated into French, German, Latin and English and reprinted fourteen times in many European countries. In particular, his illustrations were highly appreciated because they provided realistic and vivid images of China to Europeans at a time when there had been little information about China. It had a great influence on the fever for Chinese style in Europe in the 18th century. Nieuhoff’s illustrations were frequently applied to everyday painted objects such as furniture, screens, wallpaper, textiles, and dishes. About 80% of illustrations present scenery in the area where the Dutch embassy anchored or passed by on their journey from Guangdong to Beijing. However, the place names which were transliterated into Dutch and other European languages are a major obstacle for following Nieuhoff’s travelogue. It is not easy to infer the Chinese regional names from either the Dutch or the English text. Therefore, the paper identifies Chinese regions in the text by mainly comparing Nieuhoff’s information and transliteration with Martino Martini’s Novus Atlas Sinensis (1655).

본 연구는 전문가들의 의견을 수렴할 수 있는 델파이 기법을 활용하여 스쿠버다이빙 레스큐 교육과정에서의 문제점을 분 석하고 개선방안을 모색하는데 그 목적이 있다. 이를 통해 우리나라에서 이루어지는 스쿠버 레스큐 교육과정을 보다 전문적이고 체계 적으로 이루어질 수 있도록 하여 참여자들이 즐겁고, 안전하게 스쿠버다이빙을 할 수 있도록 하는 기반을 위한 기초자료로 활용할 수 있을 것이다. 이에 2022년 현재 스쿠버 레스큐 교육과정에 관여하고 있는 전문가 8명을 모집단으로 선정하여 연구 참여와 관련하여 연 구윤리동의서를 받은 후 실시하였다. 스쿠버 다이빙 레스큐 교육과정의 지도자, 프로그램, 시설 측면의 개선방안은 다음과 같다. 지도 자 측면에서는 지도자의 능력에 대한 검증제도가 필요하고, 지도자의 역량이 강화되어야 한다고 했다. 프로그램 측면에서는 스쿠버 단 체별로 최신화된 프로그램 메뉴얼을 제작하고 평가 기준을 마련해야하며, 다양한 장비를 활용한 프로그램을 개발해야 한다고 했다. 시 설 측면에서는 시설 내 인공파도 장치 등을 구축해야 한다고 하였다.

본 연구는 한국청소년정책연구원에서 실시한 한국아동·청소년 패널조사의 초등학교 4학년 패널 의 7차년도 자료인 고등학교 1학년에 재학중인 청소년을 대상으로 의사결정나무분석을 통하여 청소년 지 위비행의 고위험군의 특성을 파악하고, 그 영향요인을 확인하였다. 본 연구의 대상자 1,979명 중 지위비행 집단은 264명으로 전체의 13.3%로 나타났다. 청소년 지위비행의 고위험군은 남자이면서 긍정적 양육방식 을 낮게 인식하는 군이었다. 긍정적 양육방식이 가장 중요한 영향요인으로 나타났으며, 그 다음으로 성별, 정서문제, 교사관계, 성취가치 순이었다. 청소년 지위비행을 예방하기 위해 양육방식에 대한 부모교육 프로 그램, 남자 청소년에게 특화된 중재 프로그램의 개발이 필요하다. 또한 공격성에 초점을 두었던 그 동안의 중재에서 더 나아가, 우울, 사회적 위축 등의 정서문제를 포괄적으로 다루는 중재가 요구된다. 특히 청소년 에게 중요한 학교환경에서 교사관계가 가장 중요한 영향요인으로 밝혀진 바, 청소년 지위비행의 원인과 결 과에 대한 교육, 상담기법에 대한 훈련을 통한 교사와의 관계 증진이 청소년 지위비행을 예방하는 보호요 인으로 작용할 것이다.

Depression is one of the most important psychiatric disorders worldwide. Most depression-related data mining and machine learning studies have been conducted to predict the presence of depression or to derive individual risk factors. However, since depression is caused by a combination of various factors, it is necessary to identify the complex relationship between the factors in order to establish effective anti-depression and management measures. In this study, we propose a methodology for identifying and interpreting patterns of depression expressions using the method of deriving random forest rules, where the random forest rule consists of the condition for the manifestation of the depressive pattern and the prediction result of depression when the condition is met. The analysis was carried out by subdividing into 4 groups in consideration of the different depressive patterns according to gender and age. Depression rules derived by the proposed methodology were validated by comparing them with the results of previous studies. Also, through the AUC comparison test, the depression diagnosis performance of the derived rules was evaluated, and it was not different from the performance of the existing PHQ-9 summing method. The significance of this study can be found in that it enabled the interpretation of the complex relationship between depressive factors beyond the existing studies that focused on prediction and deduction of major factors.