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강태선(Taesun Kang) 서울대학교 보건환경연구소 2015 보건학논집 Vol.52 No.2
Wonjin Rayon Co. occupational disease incident was the milestone of occupational health and safety system and occupational compensation system in South Korea. The outbreak of carbon disulfide poisoning was officially recognized and compensated by occupational disease victims victory against employer and government. The goals of this study were 1) to understand the development of the struggle step by step 2) to know how did the weak, occupational disease victims get favorable negotiation outcomes from the strong, employer and government. Negotiation power between the negotiation parties was analyzed in the basis of Habeebss asymmetric negotiation theory. The occupational disease victims successfully enhanced the issue-specific power with proper alternatives, overwhelming commitment and control, applied use of brinkmanship and threat. The occupational disease victims struggle against Wonjin Rayon Co. was in well accord with the Habeebs negotiation theory.
강태선(Taesun Kang),김희석(Hee-Seok Kim),김태현(Tae-Hyun Kim),김종성(Jong-Sung Kim),홍석희(Seok-Hie Hong) 한국정보보호학회 2009 정보보호학회논문지 Vol.19 No.1
1998년 Kocher 등이 블록암호에 대한 차분전력공격(Differential Power Attack, DPA)을 발표하였는데 이 공격으로 스마트 카드와 같이 위조방지가 되어있는 장비에서도 암호알고리즘 연산에 사용된 암호키를 추출할 수 있다. 2003년 Akkar와 Goubin은 DES와 같은 블록암호의 전 후반 3~4 라운드의 중간값을 마스킹 값으로 랜덤화해서 전력분석을 불가능하게 하는 마스킹 방법을 소개하였다. 그 후, Handschuh 등이 차분분석을 이용해서 Akkar의 마스킹 방법을 공격할 수 있는 방법을 발표하였다. 본 논문에서는 부정차분 분석을 이용해서 공격에 필요한 평문수를 Handschuh 등이 제안한 공격방법보다 효과적으로 감소시켰으며 키를 찾는 마지막 절차를 개선하여 공격에 사용되는 옳은 입력쌍을 선별하기위한 해밍웨이트 측정시 발생할 수 있는 오류에 대해서도 효율적인 공격이 가능함을 증명하였다. In 1998, Kocher et al. introduced Differential Power Attack on block ciphers. This attack allows to extract secret key used in cryptographic primitives even if these are executed inside tamper-resistant devices such as smart card. At FSE 2003 and 2004, Akkar and Goubin presented several masking methods, randomizing the first few and last few(3~4) rounds of the cipher with independent random masks at each round and thereby disabling power attacks on subsequent inner rounds, to protect iterated block ciphers such as DES against Differential Power Attack. Since then, Handschuh and Preneel have shown how to attack Akkar's masking method using Differential Cryptanalysis. This paper presents how to combine Truncated Differential Cryptanalysis and Power Attack to extract the secret key from intermediate unmasked values and shows how much more efficient our attacks are implemented than the Handschuh-Preneel method in term of reducing the number of required plaintexts, even if some errors of Hamming weights occur when they are measured.
김태범,변혜정,강태선,Kim, Taebeom,Byun, Hyaejeong,Kang, Taesun 한국산업보건학회 2017 한국산업보건학회지 Vol.27 No.3
Objectives: This study was conducted to determine firefighters' work-related accident rate and investigate the factors affecting their on-site safety. Methods: We developed a web-based self-reported questionnaire designed to inquire into firefighters' work-related accident experience and the factors (4M; Man, Machine, Media, Management) affecting firefighters' on-site safety. We distributed questionnaires to all members of firefighting organizations in South Korea by e-mail and 9,149 were returned, resulting in a response rate of 23.1%. Results: Fifteen point seven percent of the respondents reported work-related injuries within the past one year, and 35.1% answered that current accident investigation reports are not helpful for preventing the same accident from recurring. Among the 4M factors, the one most affecting firefighters' on-site safety in the order of priority is the Man factor, followed by Machine, Media, and Management. However, the results from detailed sub-categorical factors showed some differences. 'Lack of human resources', one of the Management factors, was the most influential (70.3%), followed by 'worn-out equipment' under the Machine factor (67.2%). The viewpoint of elements of the Man factor including 'forgetting instructions' and 'fatigue and illness' were significantly different according to firefighters' rank. The higher the firefighter's rank, the more they answered 'forgetting instructions,' while the opposite was the case for 'fatigue and disease'. Conclusions: The present firefighters' accident investigation report needs to be improved, and the 4M method could prove very useful. In addition, it is necessary to set up a proper firefighters' accident investigation and prevention system.
왜 21세기 한국 사업장에서 메탄올 중독 실명 사고가 발생했을까?
이근탁,이상윤,박혜영,강태선,Lee, Geuntak,Lee, Sangyun,Park, Hyeyoung,Kang, Taesun 한국산업보건학회 2017 한국산업보건학회지 Vol.27 No.3
Objectives: Six cases of non-oral occupational methanol poisoning were found in mobile phone parts manufacturers in South Korea during the period from 22 January 2016 to 5 October 2016. We conducted this study to determine the cause of the accident including social environment factor. Methods: We interviewed the cases. Based on that, we described this poisoning accident narratively and arranged the evolution of the accident in chronological order. We used the Haddon matrix method to investigate the cause of the accident. Results: It was found that six cases were all dispatched workers who were under poor working condition including working time exceeded 12 hours a day, not given basic occupational health and safety information etc. Occupational disease associated with dispatched work was difficult to be reported. 2 cases were not able to identify the cause of the disease within one year. Conclusions: In short, the direct cause of the poisoning accident was that workers were exposed to high concentration of methanol(over 1,000 ppm). One of the main fundamental cause is that dispatched worker is rampant in the supply chain of mobile phone production. To protect dispatched workers, appropriate occupational safety health measures are needed urgently.
이찬휘(Chanhwi Lee),강태선(Taesun Kang) 한국농촌의학 지역보건학회 2019 농촌의학·지역보건 Vol.44 No.3
양봉 작업은 들기 작업이 많아 근골격계 부담이 컸으며 양봉 농업인의 대부분이 지난 1년 동안 직업과 관련된 근골격계 질환 증상을 호소했다. 보조도구인 벌통리프트를 사용하면 양봉 작업으로 인한 근골격계 부담을 줄일 수 있다. Objectives: The purpose of this study was to assess the ergonomic risk factors in beekeeping, and to evaluate the effectiveness of assistive device hive lift. Methods: This study included 30 subjects of beekeeper in Pocheon, Korea. We assessed the ergonomic risk of main task in beekeeping with NLE, OWAS and evaluate the effectiveness of hive lift. We also surveyed prevalence of musculoskeletal symptoms among the subjects based on the Korea Working Condition Survey. Results: Moving to different floral origin, internal inspection of beehives, feeding syrup is the most burdensome to musculoskeletal system (NLE LI value=2~3. OWAS action category=4). The prevalence of musculoskeletal symptoms (lower and upper extremities) among the subjects was over 80 %. The introduction of assistive devices in the three hazardous tasks has dramatically reduced the risk by removing manual lifting hives (OWAS action category<1). Conclusions: Beekeeping is a heavy workload on the musculoskeletal system because it has a lot of manual lifting task. As a result of applying the hive lift, the burden could be reduced.
김기연 ( Ki-youn Kim ),강태선 ( Taesun Kang ),이승길 ( Seung Gil Lee ),박해동 ( Hae Dong Park ),정지연 ( Jee Yeon Jeong ) 한국산업보건학회 (구 한국산업위생학회) 2017 한국산업보건학회지 Vol.27 No.2
Objectives: Improvement of the reliability of work environment measurement results is one of the principal subjects to be resolved in the field of industrial hygiene. Thus, this study was conducted in order to review domestic programs for enhancing the reliability of work environment measurement results and propose a more efficient management plan for workplace monitoring. Materials and Methods: The current domestic programs reviewed in this study are the quality control system and evaluation system for industrial hygiene laboratories, the reliability system accompanied by KOSHA (the Korea Occupational Safety and Health Agency), the system of permissible exposure limits and observed inspection system for permissible exposure limits. Their contents and data were analyzed by reviewing articles, reports, and guidelines related to reliability improvement for work environment measurement results. Results: As a result of the literature review, all the domestic programs investigated in this study had both merits and demerits in terms of considering the reliability of work environment measurement results. In particular, the fact that preliminary notification is provided to the head of a workplace before implementation would be an obstacle for elevating the reliability of work environment measurement results. Conclusions: Based on the review results obtained from this study, it is proposed that on-site measurement without preliminary notification should be considered for a more efficient inspection system that would enhance the reliability of workplace monitoring.