• Safety and Health at Work
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• 제15권1호
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• pp.59-65
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• 2024

Background: Different job strain formulations based on the Job Demand-Control model have been developed. This study evaluated longitudinal associations between job strain and psychological distress and whether associations were influenced by six formulations of job strain, including quadrant (original and simplified), subtraction, quotient, logarithm quotient, and quartile based on quotient, in randomly selected Japanese workers. Methods: Data were from waves I and II of the Survey of Midlife in Japan (MIDJA), with a 4-year followup period. The study sample consisted of 412 participants working at baseline and had complete data on variables of interest. Associations between job strain at baseline and psychological distress at follow-up were assessed via multivariable linear regression, and results were expressed as β coefficients and 95% confidence intervals including R² and Akaike information criterion (AIC) evaluation. Results: Crude models revealed that job strain formulations explained 6.93-10.30% of variance. The AIC ranged from 1475.87 to 1489.12. After accounting for sociodemographic and behavioral factors and psychological distress at baseline, fully-adjusted models indicated significant associations between all job strain formulations at baseline and psychological distress at follow-up: original quadrant (β: 1.16, 95% CI: 0.12, 2.21), simplified quadrant (β: 1.01, 95% CI: 0.18, 1.85), subtraction (β: 0.39, 95% CI: 0.09, 0.70), quotient (β: 0.37, 95% CI: 0.08, 0.67), logarithm quotient (β: 0.42, 95% CI: 0.12, 0.72), and quartile based on quotient (β: 1.22, 95% CI: 0.36, 2.08). Conclusion: Six job strain formulations showed robust predictive power regarding psychological distress over 4 years among Japanese workers.

• Journal of Radiation Protection and Research
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• 제31권2호
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• pp.69-89
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• 2006

Biological mechanisms for ionizing radiation effects are different at low doses than at high doses. Radiation hormesis involves low-dose-induced protection and high-dose-induced harm. The protective component is associated with a reduction in the incidence of cancer below the spontaneous frequency, brought about by activation of defensive and repair processes. The Linear No-Threshold (LNT) hypothesis advocated by the International Commission on Radiological Protection (ICRP) and the Biological Effects of ionizing Radiation (BEIR) Report VII for cancer risk estimations Ignores hormesis and the presence of a threshold. Cancer incidences significantly less than expected have been found in a large number of epidemiological studies including, airline flight personnel, inhabitants of high radiation backgrounds, shipyard workers, nuclear site workers in scores of locations throughout the world, nuclear power utility workers, plutonium workers, military nuclear test site Participants, Japanese A-bomb survivors, residents contaminated by major nuclear accidents, residents of Taiwan living in $^{60}Co$ contaminated buildings, fluoroscopy and mammography patients, radium dial painters, and those exposed to indoor radon. Significantly increased cancer was not found at doses <200 $mSv^*$. Evidence for radiation hormesis was seen in both sexes for acute or chronic exposures, low or high LET radiations, external whole- or partial body exposures, and for internal radionuclides. The ubiquitous nature of the Healthy Worker Effect (HWE)-like responses in cellular, animal and epidemiological studies negates the HWE as an explanation for radiation hormesis. The LNT hypothesis is wrong and does not represent the true nature of the dose-response relationship, since low doses or dose-rates commonly result in thresholds and reduce cancer incidences below the spontaneous rate. Radiation protection organizations should seriously consider the cost and health implications of radiation hormesis.

• 한국콘텐츠학회논문지
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• 제17권8호
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• pp.130-143
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• 2017

본 연구는 'B'지역노조라는 현대 일본의 '계급지향적' 노동운동을 검토하기 위해, 우선 그 이론적 틀을 모색하는 작업이다. 현재 일본에서 '계급지향적'인 노동운동은 주변에서 '잔여적인' 노동운동으로 설정되지만, 그럼에도 그 활동은 활발히 계속되고 있다. 이에 본 연구에서 그 '계급지향적' 노동운동을 분석하기 위한 이론적 틀을 살펴보았다. 먼저 윌리엄즈에 의한 개념의 변화를 검토하고, 마르크스주의의 계급 계급의식 개념과 '언어적 전회'의 새로운 주체 개념 등을 살펴보았다. 그리고 본 연구에서는 'B'지역노조의 사례에 맞게 '감정구조' 개념을 재해석하였다. 이와 같은 과정을 거쳐 본 연구에서는 'B'지역노조의 '집단적 노동자'와 '개인화된 노동자', '노동자'와 '비노동자'가 물질적 공간 혹은 비물질적 공간에서 집단화를 이룬다고 보았고, 그 '감정구조'는 '''계급지향성''을 둘러싼 모순과 절충'이라고 정리하였다. 그리고 마지막으로 본 연구에서는 그에 대한 '감정구조'의 모형을 제시했다.

• Safety and Health at Work
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• 제3권4호
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• pp.287-293
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• 2012

Objectives: Metabolic syndrome has received attention as a risk factor for cardiovascular disease, with particular importance attached to visceral fat accumulation, which is associated with lifestyle-related diseases and is strongly correlated with waist circumference. In this study, our aim is to propose waist circumference cut-off values that can be used as a marker for fatty liver based on a sample of workers receiving health checkups in Japan. Methods: This study was conducted in a total of 21,866 workers who underwent periodic health checkups between January 2007 and December 2007. The mean age of the subjects was 47.4 years for men (standard deviation [SD]: 8.0) and 44.7 years for women (SD: 6.9). Evaluation included abdominal ultrasound and measurement of waist circumference, body mass index, fasting blood glucose, triglycerides, high-density lipoprotein cholesterol, and blood pressure. Results: Based on receiver operating characteristic curve analysis, the optimal waist circumference cut-off values were shown as 85.0 cm (sensitivity 0.72, specificity 0.69) for men and 80.0 cm (sensitivity 0.75, specificity 0.78) for women. Conclusion: Abdominal ultrasound is the most efficient means of diagnosing fatty liver, but this examination seldom occurs because the test is not routinely performed at workers' health checkups. In people found to have a high risk of fatty liver, recommendations can be made for abdominal ultrasound based on the waist circumference cut-off values obtained in this study. That is, waist circumference can be used in high risk individuals as an effective marker for early detection of fatty liver.

• 노동경제논집
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• 제26권2호
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• pp.61-95
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• 2003

이 논문에서는 노동시장과의 관련하에서 일본의 직업교육훈련제도의 특징과 최근의 변화 양상 및 의의를 구명하였다. 분석 틀로서는 마스텐(D. Marsden)과 미야모토(宮本光晴)의 고용제도 모형을 이용하였다. '지적숙련논쟁'의 검토 등을 통해 고도성장기 및 오일쇼크기에 형성된 일본의 직업교육훈련제도의 본질적 특징이 '직업능력으로서의 숙련'이 제도화되지 않은 채 OJT 중신의 기업내 훈련을 통해 직능자격제도상의 내부 승진에 의해 어는 정도 높은 수준의 다기능공으로서 기능을 형성하는 데 있음을 지적하였다. 최근의 장기 불황하에서 이러한 내부노동시장은 커다란 도전을 받고 있는데 그 변화의 방향은 내부노동시장의 붕괴가 아니다. 확대되는 외부노동시장을 자격제도의 정비에 의해 직업별 노동시장으로 정비하고 그것에 의해 내부노동시장을 유지해 나가는 정책 방향인 것을 구체적인 정책분석을 통해 밝혔다.

• Safety and Health at Work
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• 제5권4호
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• pp.222-226
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• 2014

Background: Focusing on the respiratory function for health effect indices, we conducted a cross-sectional study on workers who did and did not handle toner to compare the longitudinal changes. Methods: Among 116 individuals who worked for a Japanese business equipment manufacturer and participated in the study, the analysis included 69 male workers who we were able to follow up for 4 years. We categorized the 40 workers engaged in toner-handling work as the exposed group and the 29 workers not engaged in these tasks as the referent group, and compared their respiratory function test results: peak expiratory flow rate (PEFR), vital capacity (VC), predicted vital capacity (%VC), forced expiratory volume in 1 second ($FEV_1$), and forced expiratory volume in 1 second as a percent of forced vital capacity ($FEV_1%$). Results: The cross-sectional study of the respiratory function test results at the baseline and at the $5^{th}$ year showed no statistically significant differences in PEFR, VC, %VC, $FEV_1$, and $FEV_1%$ between the exposed and referent workers. Also, respiratory function time-course for 4 years was calculated and compared between the groups. No statistically significant differences were shown. Conclusion: Our study does not suggest any toner exposure effects on respiratory function. However, the number of subjects was small in our study; studies of larger populations will be desired in the future.

• 한일민족문제연구
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• 제34호
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• pp.77-123
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• 2018

The liberated korea has the estimated population 16 million in 1945, and added 2.5 million just after an year. The korean repatriates returned by way of 2 main routes. The returnees, Wol-Nam-Min(former residents in north korea), and repatriates from Manchuria came into south korea over the 38th division line. The other repatriates from japanese islands and pacific areas came into Busan port and the vicinity. The repatriates who returned from the China and the Japanese islands made up about 80% of the total added population. However, the influx of overseas repatriates who explosively increased between 1945 and 1946, declined abruptly in April of 1946, and at last illegal re-emigration group to Manchuria and Japan Appeared, who had repatriated from those areas. This study deals with the "re-migration phenomenon of 1946" in korea, mainly focuses on 1) the motivation for those who decided to remigrate, their prospects of resettlement in Manchuria and post war japan after re-migration, 2) the structural problems of the Korean society in 1946-1947, and 3) the social recognition for the people who letf for Manchuria and Japan. This study proved the cause and background of re-migration phenomenon. The Manchuria case, the local authorities wanted farmers and peasants who could cultivate the abandoned land which had been originally pioneered and reclaimed by korean poor peasants, who repatriated to korean peninsula. On the other hand, the korean repatriates had a hard time in tenanting farmland, and so much difficulty in getting farming tools including fertilizer. That's why they left korea for Manchuria again. The Japanese case, the korean repatriates had a tough life owing to the restriction of properties left in japan, while the inflation and food shortage in korea got worse and worst. Accordingly, many koreans tried illegal entrance into post war japan. This study is a part of clarifying the universality and specificity of post war repatriation and migration issues developed in the south Korea. Through this study, we can find how difficult it is for newly liberated areas to accommodate repatriates and make them ordinary nationals in harmonic way with successful social integration. and we can observe the social aspect and administrative ability of newly liberated south korea in detail, Because the present korea has faced with so many problems connected with immigration workers and re-setting with korean communities abroad, we should introspect these historical experience of our own.

• 농촌지도와개발
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• 제16권2호
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• pp.385-404
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• 2009

The youth's rural rehabilitation movement started the crusade against illiteracy and poverty with all young educated elites including Whang Jongjin(a student of Yesan Public Agricultural High School) of the village, Shiryang-ri. Deoksan-myon. Yesan-gun. Among others, Patriot Youn(1908-1932) initiated the movement. The main projects of the agricultural extension were the Evening School(1926), Reading Club, the Woljin.Hoe(1929), Puheung.Won(1928), a Mutual Financing Association for Swine Farming, Sweet Potato Cultivation, Cooperative Planting, the Shuam.Sports Club and Consumer's Cooperative Society. The idea in Nongmindokbon (Famer's Text, 1927) is based on liberalism, equality, independence, a pioneer and cooperative spirit or realization of a physiocratical Utopia. Most references about Patriot Youn are concerned with his heroic deed in Shanghai, however the youth in Shinyang-Ri are typical agricultural extension workers or in other words, a forerunner of Saemaul Undong.

• 한국식생활문화학회지
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• 제18권1호
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• pp.56-68
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• 2003

The objects of this study are to find out (1) real situation of the food supply in prison under Imperial Government of Japan more cleary (historical meaning) and (2) which might help in understanding wrong present food consumption patterns in Korea which causes environmental as well as health problems. It is generally known that the length of the Japanese occupation for Korea is 36 years. However, it is concluded in this study that it was longer (70 years ; from 1875 to 1945 from when Japanese Army attacked and occupied Yungjongdo and Kanghwado island to e time when they were defeated on World War II.) Korea was annexed by Japan in 1910 then the Imperial Government of Japan dismissed the Korea Army, controlled the Office of Justice and the management of prison by force. Since then about 50% of all land was fell into Japanese Government ownership and 80% of Korean farmers became as tenant. After this change, Korea farmers were forced to pay extremely high rent (up to 80% of its harvest). Forced immigration, low price procurement of grain by Japanese government up to more than 30%of their production, was practiced. Accordingly, the food situation of Korean farmers became miserable, which may caused more violations of Imperial Japanese Law. Malnutrition, epidemic diseases, mortality rate of infants soared and average life expectancy shortened to 20-30 years old. This was the period of World Economic Crises and Food Crises in Japan. It was said then that if one Japanese comes to Korea then 200 Koreans will starved to death. Meanwhile, Proconsul Bureau of Chosun requested to the Department of Medicine, the Imperial University of Kyungsung to survey food supply situation of Koreans in prison throughout Korea. Objectives of the survey then was not only to find out scientifically whether it is agreeable in maintaining prisoner's health and also find out the possibility to save food during food crisis. Survey was started from 1923 and ended in 1945, and it focussed on prisoners in the Seodaemoon Prison. This report is the outcome of the first survey. They concluded that the food supplied was nutritionally (had) no problem, in compare with those of workers in the factory, students in the dormitory in Japan and with those of prisoners in Taiwan, France and Germany. Amount of grain supplied were different according to their work lord and was divided into 9 different levels. Total grain was consisted of 50% millet, 30% soybean and 20% indica rice(variety). However, there were no difference in the amount of supply of side dishes between work groups. For the highest working group, 3280g of boiled grain per day was supplied to make stomach full but as a side dishes, salty fermented bean paste, fermented fish and salty soups, etc. was supplied. Deficiency of animal protein were observed, however, high intake of soybean may possibly caused animal protein deficiency problem. On the contrary, the intake of water soluble vitamins were insufficient but the level of calcium and iron intake seems to be sufficient, however, imbalance of intake of nutrition may caused low absorbtion rate which might caused malnutrition. High intake of dietary fiber and low intake of cholesterol may possibly prohibited them from so called modem disease but may caused the defect in disease resistancy againist epidemics and other traditional disease. Over intake of salt(20-30g per day) was observed. Surveyors who attended in this survey, mentioned that the amount of food intake may nutritionally be sufficient enough but the quality of food(and possibly, the taste of food) were like that of animal feed. For the officials who received this report might consider that considering the war situation and food crisis, the supply situation of food in the prison may considered to be good enough(because they are not starving). But as a Korean who studied this report, one feel extremely pity about those situation because (situation of) those period were very harsh under the Imperial Law and keeping the Law by Koreans were almost impossible, therefore, about one third adult violated the Law and were put into jail. And they were treated like animals.

• 산업노동연구
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• 제17권1호
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• pp.177-208
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• 2011

이 글은 1970년대 중화학 공업화로 대표되는 산업화 시기를 배경으로 철강업종의 대표 사업장을 사례로 사내하청 노동이 어떻게 도입, 전개되어 왔는지를 살펴보고 있다. 한국 금속부문의 중화학 공업화는 대규모 자본이 일시에 동원되는 산업화 전략이었기에 그에 따른 대규모 임노동자에 대한 인사 노무관리 차원의 노동력 통제 기제의 확보가 필수적일 수밖에 없었다. 한국 철강업종의 경우, 이러한 필요를 일본 경제의 배후지 편입을 통한 자본 동원과 인사, 노무관리 체제의 도입 모방을 통해 충족시킬 수 있었다. 이는 정규 생산 기능직에 대한 위계적 내부노동시장의 형성과 더불어 사내하청의 도입으로 구체화되었다. 이러한 철강업종 포항제철의 사례는 산업화 과정에서 사내하청 노동이 사라지고 내부노동시장이 형성되어 왔던 서구의 사례에 비추어 볼 때, 이례적이며, 이는 한국 경제의 후발 산업화와 밀접하게 관련되어 있다. 금속부문 사내하청 노동과 관련하여 이러한 철강업종 포항제철의 사내하청 노동의 도입, 전개가 함의하는 바는 첫 번째는 고용체제 형성에 있어서 후발자 효과, 두 번째는 한국고용체제의 비공식성과 연결된다는 점이다. 이러한 점은 현재 철강업종내 비정규 노동으로서의 사내하청 노동이 산업화 과정에 직접적으로 영향받으며 대공장 부문내 작업장내 노무관리 기제로 구조화되어 전개되어 왔다는 점을 의미하는 것이라 할 수 있다. 이런 점에서 현재 금속부문 사내하청 노동 문제 해결의 정책적 방향 또한 협의의 노동 문제를 넘어서서 광의의 경제적 영역까지 포괄하는 정책 방향이 필요하다.