• 대한공업교육학회지
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• 제33권2호
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• pp.44-71
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• 2008

이 연구는 기업 공고연계 맞춤형 인력양성 프로그램 수료자의 경력설계 및 개발 촉진방안을 마련하기 위한 기초자료를 제공하는 데 목적이 있다. 이를 위하여 먼저 기업 공고연계 맞춤형 인력양성 프로그램의 개념과 관련 정책, 경력설계 및 개발 이론을 검토하고 프로그램 수료 후 어떤 경력발달이 가능한지를 구안해보았다. 그리고 아직은 수료자들이 경력설계 초기단계에 있지만 향후 자신의 경력을 개발해 나가기 위해 현재 어떻게 근무하며 성장을 위한 준비를 하고 있는 지를 살펴보고자 하였다. 이 프로그램을 수료한 근로자의 근무현황과 경력설계 및 개발 실태를 설문조사한 것이다. 연구결과는 다음과 같다. 첫째, 수료근로자들은 평균적으로 기업규모가 50여명 되는 기업에서 주당 50여 시간 근로하며, 초과근무수당 포함 월100만원~120만원의 임금을 받는 것으로 나타났다. 둘째, 현장실습 시 단기간의 OJT를 통해 직무에 대한 오리엔테이션을 받으며, 선배근로자(46%) 혹은 직반장들(42%)의 도움을 받아 초기 직무를 습득하고 있었다. 자신의 경력목표 달성을 위해 가장 도움이 되는 사람도 이들이라고 응답하였다. 셋째, 수료근로자들은 자신의 진로에 대하여 상당히 고민하고 있었다. 이들은 대다수가 현실적으로 실현 가능한, 그리고 자신이 선택한 맞춤프로그램과 관련된 분야에서 쌓은 경험을 유리하게 활용하여 성공하려는 목표를 가지고 있었는데, "제조생산기술자(31.7%)", "사장(30.5%)", "설계기술자(13.8%)", "연구개발기술자(12.0%)" 등의 순서로 경력개발목표를 설정하였다. 넷째, 수료근로자들은 자신의 목표 달성을 위해 다양한 노력을 기울이지 못하고 있었다. 목표 달성을 위해 하는 노력으로 가장 많이 선택한 항목은 "상사의 지시를 성실히 이행하는 것"(60.5%)이었다. 다섯째, 목표 달성에 가장 큰 장애로 예상되는 것은 시간부족(31.7%), 능력부족(30. 5%), 의지력과 지구력부족(25.6%) 등 자기 자신과 관련된 것이었다. 소수가 회사의 분위기나 가족의 후원 부족이 장애가 된다고 응답하였다.

• 한국분말야금학회:학술대회논문집
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• 한국분말야금학회 2002년도 제3회 최신 분말제품 응용기술 Workshop
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• pp.25-37
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• 2002

The most important industrial application of gamma radiation in characterizing green compacts is the determination of the density. Examples are given where this method is applied in manufacturing technical components in powder metallurgy. The requirements imposed by modern quality management systems and operation by the workforce in industrial production are described. The accuracy of measurement achieved with this method is demonstrated and a comparison is given with other test methods to measure the density. The advantages and limitations of gamma ray densitometry are outlined. The gamma ray densitometer measures the attenuation of gamma radiation penetrating the test parts (Fig. 1). As the capability of compacts to absorb this type of radiation depends on their density, the attenuation of gamma radiation can serve as a measure of the density. The volume of the part being tested is defined by the size of the aperture screeniing out the radiation. It is a channel with the cross section of the aperture whose length is the height of the test part. The intensity of the radiation identified by the detector is the quantity used to determine the material density. Gamma ray densitometry can equally be performed on green compacts as well as on sintered components. Neither special preparation of test parts nor skilled personnel is required to perform the measurement; neither liquids nor other harmful substances are involved. When parts are exhibiting local density variations, which is normally the case in powder compaction, sectional densities can be determined in different parts of the sample without cutting it into pieces. The test is non-destructive, i.e. the parts can still be used after the measurement and do not have to be scrapped. The measurement is controlled by a special PC based software. All results are available for further processing by in-house quality documentation and supervision of measurements. Tool setting for multi-level components can be much improved by using this test method. When a densitometer is installed on the press shop floor, it can be operated by the tool setter himself. Then he can return to the press and immediately implement the corrections. Transfer of sample parts to the lab for density testing can be eliminated and results for the correction of tool settings are more readily available. This helps to reduce the time required for tool setting and clearly improves the productivity of powder presses. The range of materials where this method can be successfully applied covers almost the entire periodic system of the elements. It reaches from the light elements such as graphite via light metals (AI, Mg, Li, Ti) and their alloys, ceramics ($AI_20_3$, SiC, Si_3N_4, $Zr0_2$, ...), magnetic materials (hard and soft ferrites, AlNiCo, Nd-Fe-B, ...), metals including iron and alloy steels, Cu, Ni and Co based alloys to refractory and heavy metals (W, Mo, ...) as well as hardmetals. The gamma radiation required for the measurement is generated by radioactive sources which are produced by nuclear technology. These nuclear materials are safely encapsulated in stainless steel capsules so that no radioactive material can escape from the protective shielding container. The gamma ray densitometer is subject to the strict regulations for the use of radioactive materials. The radiation shield is so effective that there is no elevation of the natural radiation level outside the instrument. Personal dosimetry by the operating personnel is not required. Even in case of malfunction, loss of power and incorrect operation, the escape of gamma radiation from the instrument is positively prevented.

• 대한의용생체공학회:학술대회논문집
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• 대한의용생체공학회 1997년도 추계학술대회
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• pp.357-360
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• 1997

For medical students and doctors, knowledge of the 3-dimensional (3D) structure of the heart is very important in diagnosis and treatment of the heart diseases. 2-dimensional (2D) tools (e.g. anatomy book) or classical 3D tools (e.g. plastic model) are not sufficient or understanding the complex structures of the heart. Moreover, it is not always guaranteed to dissect the heart of cadaver when it is necessary. To overcome this problem, virtual dissection systems of the heart have been developed. But these systems are not satisfactory since they are made of radiographs; they are not true 3D images; they can not be used to dissect freely; or they can only be operated on the workstation. It is also necessary to make the dissection systems incorporating the various races and tribes because of the organ's difference according to race and tribe. This study was intended to make the 3D image of the heart from a Korean cadaver, and to establish a virtual dissection system of the heart with a personal computer. The procedures or manufacturing this system were as follows. 1. The heart from a Korean adult cadaver was embedded with gelatin solution, and serially cross-sectioned at 1mm-thickness on a meat slicer. Pictures or 153 cross-sectioned specimens were inputted into the computer using a digital camera ($756{\times}504$ resolution, true color). 2. The alignment system was established by means of the language of IDL, and applied to align 2D images of the heart. In each of 2D images, closed curves lining clean and dirty blood pathways were drawn manually on the CorelDRAW program. 3. Using the language of IDL, the 3D image and the virtual dissection system of the heart were constructed. The virtual dissection system of the heart allowed or ree rotation, any-directional sectioning, and selected visualization of the heart's structure. This system is expected to become more advanced, and to be used widely through Internet or CD-title as an educational tool for medical students and doctors.

• 한국산업보건학회지
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• 제26권2호
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• pp.225-236
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• 2016

Objectives: Nanomaterials have been used in various fields. As use of nanoproducts is increasing, workers dealing with nanomaterials are also gradually increasing. Exposure assessments for nanomaterials have been carried out for protection of worker's health in workplace. Exposure studies were mainly focused on manufacturing processes, but these studies on after-treatment processes such as refinement, weighing, and packing were insufficient. So, we investigated exposure characteristics of particles during after-treatment processes of $Al_2O_3$ fibers and Ni powders. Methods: Mass-production of Ni powder process was carried out in enclosed capture-type canopy hood. In a developing stage, $Al_2O_3$ was handled with a local ventilation unit. Exposure characteristics of particles were investigated for $Al_2O_3$ fiber and Ni powder processes during the periods of 10:00 to 16:00, 20 May 2014 and 13:00 to 16:00, 21 May 2014, respectively. Three real-time aerosol instruments were utilized in exposure assessment. A scanning mobility particle sizer(SMPS, nanoscan, model 3910, TSI) and an optical particle counter(OPC, portable aerosol spectrometer, model 1.109, Grimm) were used to determine the particle size distribution in the size range of 10-420 nm and $0.25-32{\mu}m$, respectively. In addition, a nanoparticle aerosol monitor(NAM, model 9000, TSI) was used to measure lung-deposited nanoparticle surface area. Membrane filters(isopore membrane filter, pore size of 100 nm) were also used for air sampling for the FE-SEM(model S-5000H, Hitachi) analysis using a personal sampling pump(model GilAir Plus by 2.5 L/min, Gilian). Conclusions: For Ni powder after-treatment process, only 27% increase in particle concentration was found during the process. However, for $Al_2O_3$ fiber after-treatment process, significant exposure(1.56-3.34 times) was observed during the process.

• Journal of Preventive Medicine and Public Health
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• 제26권1호
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• pp.147-164
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• 1993

A study has been conducted on developing questionnaires to serve as on site diagnostic tools for the early detection of neuropsychiatric impairment among workers chronically exposed to low-level organic solvents. Two drafts of tentative questionnaires have been developed as follows; several question items were selected from questionnaires which were administered to workers exposed to organic solvents in previous studios and were grouped into each symptom category based on the presence of its association using Guttman scaling method, then these selected items were reviewed by neuropsychiatry specialists. The final draft of the questionnaire (total symptom score=36) was developed by selecting 33 question items which had more than a 0.88 Guttman coefficient of reproducibility in each symptom category from a pilot study in which these tentative questionnaires were administered to workers manufacturing soles. Three plants using organic solvents and one plant never using organic solvents as a control group were selected to test the reliability and validity of the developed questionnaires. The major organic solvent in the workplace environment detected by a personal air sampler and GC/MSD nab toluene. The concentration of toluene in air from the department using organic solvent was statistically different from that of the department never using organic solvent. The concentration of toluene from almost all of the workplace did not exceed the allowable level. There was no statistically significant difference between the concentration of urinary hippuric acid from the workers of the department using organic solvent and that of the department never using it. Total symptom score of the plant never using organic solvents was 9.8 and those of the three plants using organic solvents were 15.6, 14.7, and 13,7 respectively. In order to evaluate the validity of the questionnaires, the workers from two different departments of the plant in which usage of organic solvents are totally dofferemt were compared. The total symptom score was 17.8 for workers of the department using organic solvent and 13.5 for the department never using organic solvent and scores of each symptom group between exposure and non-exposure group also showed statistically significant difference. The finding that total symptom score of the exposure group increased as the duration of employment increased indirectly suggests the usefulness of the developed questionnaire to assess the health effects of chronic exposure to organic solvents. The correlation coefficient, which was calculated to evaluate the test-retest reliability, was 0.581 (p=0.001). The coefficient of Crohnbach which reflects the internal consistency of the questionnaire was 0.91. In conclusion, the reliabilty of the questionnaire was well maintained over the time lapse between the two administrations of the questionnaire and despite the seasonal difference.

• Journal of Preventive Medicine and Public Health
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• 제28권1호
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• pp.225-243
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• 1995

Benzidine Industry in Korea has started after Japan has banned its production in early 1970's, and it has been in operation in Korea for over 20 years. However, it is not known yet whether any bladder cancer has developed from benzidine exposure. This study was done to screen benzidine-exposed workers for bladder cancer, and to examine the feasibility of employing screening test at the workplace. All the workplaces that manufacture or use benzidine for more than 20 years in Korea have been covered in this study, and they include 2 benzidine manufacturing factories, 5 benzidine using factories, as well as 2 benzidine free factories as an outside control. In total, 516 workers were screened with urine stick test and urine cytology test for the evidence of hematuria and abnormal urothelial cells. Each worker was also asked about risk factors and symptoms of bladder cancer including past medical history, smoking, medication and occupational history Benzidine in the air was measured by personal and area sampling. Out of 516 screened workers, 84(16.3%) workers showed positive hematuria in urine stick test, and 7(1.4%) workers showed degenerative cells in urine cytology tests. Those workers with abnormal urine test results who have been exposed to benzidine fo more than 10 years were further screened, and, in total, 23 workers were examined with intra-venous pyelography and cystoscopy. None of those screened had any evidence of bladder cancer When workers with only past hematuria history were included in the positive hematuria group, 96(18.5%) had positive hematuria. On the multiple logistic regression analysis, positive hematuria was significantly associated with benzidine exposure, history of other occupations with elevated bladder cancer risk, pyuria and glycosuria. The association got stronger as direct benzidine exposure was accounted through individual task analysis, and as exposure duration was accounted with tenure analysis. For those with benzidine exposure with more than 10 years of tenure, the odds of having positive hematuria was elevated 2.14(95%C.I is 1.08 to 4.25) times more than for those without exposure. Even though bladder cancer was not detected for several limitations including short observation period, majority of studied workers with short latency, healthy worker effect, and low sensitivity of single screening test in a cross-sectional study, the study results suggest that hematuria screening is a feasible and very useful test for bladder cancer screening among benzidine exposed workers.

• 감성과학
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• 제8권3호
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• pp.291-301
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• 2005

본 연구에서는 작가의 개념과 계획에 의한 주관적 연출로 대부분 이루어지는 식음 테이블 데커레이션에 대한 작가와 관람자 상호 호응의 관계를 형성하기 위한 유도로서 관람자의 선호요인, 즉 선호 디자인, 디자인이미지, 디자인요소 간의 인과관계를 파악하고자 한다. 이를 위한 실증연구로 off-line의 대인 면접에 의한 일대일로 설문 조사하여 필요한 정보를 획득하여, 분석하였으며, 그 결과는 아래와 같다. 식음 테이블 데커레이션의 관람자 선호도에 대한 조사 분석으로는 조화로운, 따뜻한, 여성적인의 디자인 이미지의 유사색 조화가 선호되었다 디자인 선호도와 상관관계가 높은 이미지 형용사는 '조화로운과 조화롭지 않은'으로, '조화로운'의 디자인 요소는 유사 색 조화로 '조화롭지 않은'은 혼합 색 조화로 나타났다 따라서 '색채'가 선호 디자인 요소로서 가장 중요하게 부각되었다.

• Korean Chemical Engineering Research
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• 제50권1호
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• pp.112-117
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• 2012

나노기술의 발전과 함께 나노물질을 포함한 소비재가 대중화되고 있다. 그러나 지난 10여년간 조심스럽게 제기되고 있는 나노물질의 잠재적 위해성으로 인해, 나노제품 사용을 불안해하고 있다. 특히 나노제품을 직접 취급하는 생산시설(연구소 및 업체)의 작업자는 직접적인 인체 노출을 초래하게 된다. 따라서 이들에 대한 인체 및 환경 노출 안전관리를 위하여, 직접적인 노출평가가 필요하다. 본 연구에서는 기상 및 액상 반응을 통해 나노물질을 생산하는 두 곳의 업체를 현장 방문하여 나노물질의 주요 노출대상 공정과 노출원을 파악하고 SMPS를 이용한 실시간 현장 모니터링을 실시하였다. 분석 결과, 액상 공정도 기상으로의 나노입자 노출이 심각하게 발생하고 있음을 확인하였다. 가장 문제가 되는 점은 나노물질의 잠재적인 위해성에 관한 인식의 부족으로 제대로 된 방호활동을 못하고 있다는 점이다. 따라서 보다 다양한 나노물질 취급 시설에 대한 환경노출 평가가 필요하고 이를 바탕으로 한 나노물질 취급 안전관리 방법이 제시되어야 한다.

• 한국방재안전학회논문집
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• 제11권2호
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• pp.9-15
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• 2018

비즈니스 연속성에 치명적인 영향을 줄 수 있는 홍수, 호우, 강풍 등 자연재해와 911 미국테러, 사이버 공격 등의 사회재난 등으로 부터, 비즈니스 연속성을 유지할 수 있도록 기업 내에 비즈니스 연속성 경영시스템 (BCMS)의 도입 및 구축이 필요한 실정이며, 이를 체계적이고, 효율적인 운영 및 관리하기 위해 조직의 비상사태에 대한 조직 인식구조의 변화가 무엇보다 필요하다고 할 수 있다. 따라서, 본 연구는 스마트 F기업의 비즈니스 연속성 경영시스템 (BCMS) 도입에 따른 조직의 인식구조 변화에 미치는 효과 및 영향을 분석해 보기위해, 개인인식, 조직문화, 조직구조, 조직전략 이상 4가지 범주로 나누어, 설문조사를 실시하였고, 그 설문 자료를 통해, 통계적으로 분석하여, 비즈니스 연속성 경영시스템 도입이 각 범주별로 조직의 인식구조 변화에 미치는 영향을 분석하고, 검증하였다. 이 연구를 통해, 기업 내에 비즈니스 연속성 경영시스템 도입이 비상사태에 대한 조직의 인식구조에 효과적인 변화를 가져오며, 이를 통해 기업의 가치 향상은 물론 비즈니스 연속성을 유지하는데 커다란 도움이 될 수 있을 것이라고 본다.

• Annals of Occupational and Environmental Medicine
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• 제35권
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• pp.39.1-39.14
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• 2023

Background: Diseases affecting the lungs and airways contribute significantly to the global burden of disease. The problem in low- and middle-income countries appears to be exacerbated by a shift in global manufacturing base to these countries and inadequate enforcement of environmental and safety standards. In Ghana, the potential adverse effects on respiratory function associated with occupational wood dust exposure have not been thoroughly investigated. Methods: Sixty-four male sawmill workers and 64 non-woodworkers participated in this study. The concentration of wood dust exposure, prevalence and likelihood of association of respiratory symptoms with wood dust exposure and changes in pulmonary function test (PFT) parameters in association with wood dust exposure were determined from dust concentration measurements, symptoms questionnaire and lung function test parameters. Results: Sawmill workers were exposed to inhalable dust concentration of 3.09 ± 0.04 mg/m³ but did not use respirators and engaged in personal grooming habits that are known to increase dust inhalation. The sawmill operators also showed higher prevalence and likelihoods of association with respiratory symptoms, a significant cross-shift decline in some PFT parameters and a shift towards a restrictive pattern of lung dysfunction by end of daily shift. The before-shift PFT parameters of woodworkers were comparable to those of non-woodworkers, indicating a lack of chronic effects of wood dust exposure. Conclusions: Wood dust exposure at the study site was associated with acute respiratory symptoms and acute changes in some PFT parameters. This calls for institution and enforcement of workplace and environmental safety policies to minimise exposure at sawmill operating sites, and ultimately, decrease the burden of respiratory diseases.