• 품질경영학회지
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• 제42권3호
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• pp.407-424
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• 2014

Purpose: The purpose of this study was to propose supply chain management efficiency by analyzing moderating effect on the training support project in small and midium-sized enterprise. Methods: The collected data through the survey were analyzed using multi?regression analysis. The measurement tools used for this study were divided into three dimensions such as personal characteristics, supportive environment and training effect. Results: The results of this study are as follows; first, it was found that the effects of personal characteristics and supportive environment were significant on training effect. Second, significant differences were found between supply chain management active group and inactive group. Third, moderating effect of supply chain manage efficiency was found between variables. Conclusion: SME supporting project in training program needs supply chain management efficiency for training effect. Supply chain management needs to be promoted in SMEs not only for performance but also for their workplace learning and learning culture.

• 한국정보기술응용학회:학술대회논문집
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• 한국정보기술응용학회 2005년도 6th 2005 International Conference on Computers, Communications and System
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• pp.365-368
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• 2005

While the goal of new IT adoption in small and medium sized firms is to choose an optimal system to fit with their own environments and conditions, that of IT post-adoption usage is to fully implement new IT and maximize their benefits from it. Therefore, the decision-making environments of new IT adoption is definitely different from those of post-adoption. Also, The direct experience of IT usage can provide some learning effect and the change of users' beliefs on new IT. From this point of view, this study attempts to figure out the differences of influencing factors on IOS usage intention between adopters and non-adopters. The results show that there are clear differences of influencing factors between two groups. Non-adopter group shows that perceived financial cost and ability of use have significant influences on IOS usage intention, while relative advantage and perceived risk in adopter group have statistically significant influences on post-adoption usage of IOS.

• 한국산업융합학회 논문집
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• 제26권5호
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• pp.757-763
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• 2023

Major industrial accidents in which workers die due to fires or explosions while working at chemical substance handling workplaces continue to occur. Among the major industrial accidents that occurred between 2005 and 2021, the accident status by work situation and equipment was analyzed. Through analysis, it was confirmed that storage, reaction, and piping facilities were the main causes of the accident, and a self-checklist for each facility was developed. Verification was conducted through the supply and use groups to evaluate the suitability of the use, duties, and items of the self-checklist. The user group showed higher satisfaction than the supplier group for all three suitability of use, job, and item. In particular, since the inspection items of the self-checklist were organized around the cause of the accident derived through the analysis of actual accident cases, the satisfaction level was high in all groups. It is expected that the self-checklist developed through this study will be useful not only for large companies but also for small and medium-sized chemical industries that lack professional manpower.

• 한국콘텐츠학회논문지
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• 제17권4호
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• pp.488-499
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• 2017

본 연구는 소형주택의 주거만족요인을 인구통계특성 그룹별로 세분화하여 연구하였다. 연구그룹은 전체 그룹과 그리고 남녀 성별로(2그룹), 연령대별로(3그룹), 기혼과 미혼이라는 혼인별로(2그룹)하여 총 8개 그룹으로 세분화하였고 주거만족요인은 사회적특성, 경제적특성, 접근성, 외부쾌적성, 물리적특성, 생활편리성 등으로 분류하여 분석하였다. 연구결과는 소형주택의 경제적특성 요인이 대부분의 그룹에서 주거만족에 가장 큰 영향력을 미치는 요인으로 나타났다. 다음으로는 생활편리성이 유의하게 영향을 미쳤다. 그러나 물리적 특성은 전체그룹에서 낮은 영향력을 보이거나 유의하지 않았다. 기타 주거만족요인들은 각각의 그룹별로 주거만족에 미치는 영향이 다르게 나타났다.

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2004년도 하계학술발표 논문집
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• pp.204-204
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• 2004

• Toxicological Research
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• 제29권2호
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• pp.121-127
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• 2013

Nanotoxicological research has shown toxicity of nanomaterials to be inversely related to particle size. However, the contribution of agglomeration to the toxicity of nanomaterials has not been sufficiently studied, although it is known that agglomeration is associated with increased nanomaterial size. In this study, we prepared aerosols of nano-sized carbon black by 2 different ways to verify the effects of agglomeration on the toxicity and deposition of nano-sized carbon black. The 2 methods of preparation included the carbon black dispersion method that facilitated clustering without sonication and the carbon black dispersion method involving sonication to achieve scattering and deagglomeration. Male Sprague-Dawley rats were exposed to carbon black aerosols 6 hr a day for 3 days or for 2 weeks. The median mass aerodynamic diameter of carbon black aerosols averaged $2.08{\mu}m$ (for aerosol prepared without sonication; group N) and $1.79{\mu}m$ (for aerosol prepared without sonication; group S). The average concentration of carbon black during the exposure period for group N and group S was $13.08{\pm}3.18mg/m^3$ and $13.67{\pm}3.54mg/m^3$, respectively, in the 3-day experiment. The average concentration during the 2-week experiment was $9.83{\pm}3.42mg/m^3$ and $9.08{\pm}4.49mg/m^3$ for group N and group S, respectively. The amount of carbon black deposition in the lungs was significantly higher in group S than in group N in both 3-day and 2-week experiments. The number of total cells, macrophages and polymorphonuclear leukocytes in the bronchoalveolar lavage (BAL) fluid, and the number of total white blood cells and neutrophils in the blood in the 2-week experiment were significantly higher in group S than in normal control. However, differences were not found in the inflammatory cytokine levels (IL-$1{\beta}$, TNF-${\alpha}$, IL-6, etc.) and protein indicators of cell damage (albumin and lactate dehydrogenase) in the BAL fluid of both group N and group S as compared to the normal control. In conclusion, carbon black aerosol generated by sonication possesses smaller nanoparticles that are deposited to a greater extent in the lungs than is aerosol formulated without sonication. Additionally, rats were narrowly more affected when exposed to carbon black aerosol generated by sonication as compared to that produced without sonication.

• 한국식품위생안전성학회지
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• 제26권1호
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• pp.43-48
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• 2011

본 연구는 이산화규소 나노입자의 급성독성을 확인하기 위해 여러 농도로 마우스의 복강에 주사한 다음 24시간 후에, 혈액학적, 혈액생화학적, 그리고 병리조직학적인 검사를 수행하였다. 혈액학적 검사에서, group II (100 mg/kg 이산화규소 나노입자)에서는 lymphocyte와 monocyte의 수치가 대조군과 비교하여 통계적으로 유의한 차이를 나타내었으며(p < 0.05), group III (200 mg/kg 이산화규소 나노입자)에서는 lymphocyte, monocyte, 그리고 hemoglobin의 수치가 대조군과 비교하여 통계적으로 유의한 차이를 나타내었다(p < 0.05). 혈액생화학적 검사에서, group II의 경우에는 ALT가, group III의 경우에는 AST, ALT, BUN, 그리고 creatinine이 대조군과 비교하여 통계적으로 유의한 차이를 나타내었다(p < 0.05). 병리조직학적 관찰에서는, group III의 간과 신장 조직에서 미약한 독성작용이 관찰되었다. 향후, 이산화규소 나노입자에 대한 장기적인 연구를 통해 독성영향 및 작용기전을 규명할 필요가 있는 것으로 사료된다.

• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2006년도 정기학술발표대회 논문집
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• pp.402-407
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• 2006

중소규모업체가 한 나라의 경제에서 차지하고 있는 비중과 영향력은 매우 크다. 지금까지 경제시장에서 과소평가되어 온 많은 중소규모업체들이 제조업을 중심으로 한 해외시장에서 큰 두각을 나타내면서 기존의 이러한 시각에 큰 변화를 주고 있다. 특히, 국내시장의 한계를 벗어나려는 중소규모 건설업체 입장에서 급속도로 글로벌화 되고 있는 해외건설시장에서의 발전 가능성은 매우 잠재력이 크다. 그러나 아직까지 해외건설시장에 중소규모업체의 역할은 매우 미미한 수준이다. 이에 본 연구에서는 국내 중소규모 건설업체의 해외진출을 활성화하기 위해 가능성과 의지가 있는 중소규모 건설업체를 그룹 별로 분류하여 해외진출 활성화 방안을 각 그룹 별로 제시하고자 한다. 1996년부터 2005년까지 ENR(Engineering News Record)지에 등록된 해외 선진건설업체의 해외공사 비중을 분석하고 해외건설시장에 기 진출한 국내 건설업체의 해외공사 비중과 법적 근거를 반영하여 국내 중소규모 건설업체의 분류 기준을 새롭게 제시하였다. 마지막으로 전문가 인터뷰 방식을 실시하여 새롭게 정의된 국내 중소규모 건설업체들의 각 그룹 별 해외진출 활성화 방안을 제시하였다.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제31권5호
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• pp.440-453
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• 2005

Objectives : To develop a bioactive membrane for guided bone regeneration (GBR), the biocompatibility and bone regenerating capacity of the cellulose membrane obtained from the Ascidians squirt skin were evaluated. Materials and methods : After processing the pure cellulose membrane from the squirt skin, the morphological study, amino acid analysis and the immunoreactivity of the cellulose membrane were tested. Total eighteen male Spraque-Dawley rats (12 weeks, weighing 250 to 300g) were divided into two control (n=8) and another two experimental groups (n=10). In the first experimental group (n=5), the cellulose membrane was applicated to the 8.0 mm sized calvarial bone defect and the same sized defect was left without cellulose membrane in the first control group (n=4). In the another experimental group (n=5), the cellulose membrane was applicated to the same sized calvarial bone defect after femoral bone graft and the same sized defect with bone graft was left without cellulose membrane in the another control group (n=4). Each group was sacrificed after 6 weeks, the histological study with H&E and Masson trichrome stain was done, and immunohistochemical stainings of angiogenin and VEGF were also carried out. Results : The squirt skin cellulose showed the bio-inductive effect on the bone and mesenchymal tissues in the periosteum of rat calvarial bone. This phenomenon was found only in the inner surface of the cellulose membrane after 6 weeks contrast to the outer surface. Bone defect covered with the bioactive cellulose membrane showed significantly greater bone formation compared with control groups. Mesenchymal cells beneath the inner surface of the bioactive cellulose membrane were positive to the angiogenin and VEGF antibodies. Conclusion : We suppose that there still remains extremely little amount of peptide fragment derived from the basement membrane matrix proteins of squirt skin, which is a kind of anchoring protein composed of glycocalyx. This composition could prevent the adverse immunological hypersensitivity and also induce bioactive properties of cellulose membrane. These properties induced the effective angiogenesis with rapid osteogenesis beneath the inner surface of cellulose membrane, and so the possibilities of clinical application in dental field as a GBR material will be able to be suggested.

• 대한정형외과스포츠의학회지
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• 제3권1호
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• pp.73-80
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• 2004

목적: 중범위와 대범위 전층 회전근 개 파열에서 관절경 하의 봉합술과 소절개 봉합술을 비교하기 위함이다. 재료 및 방법: 중범위와 대범위의 전층 회전근 개 파열 34예를 대상으로 하였으며, 관절경 하 봉합술을 시행한 13예를 제 1군으로, 소절개 봉합술을 시행한 21예를 제 2군으로 하였다. 파열 크기는 1 cm에서 5 cm까지 였다. 평균 추시 기간은 24(범위; 12$\~$36)개월과 28(범위;12$\~$36)개월이었다. VAS (Visual Analogue Scale) 동통 점수를 이용하여 주관적 통증을 비교하였고, ADL (Activity of Dally Living) 일상 생활 지수를 이용하여 비교하였으며, 기능 평가는 UCLA (University of California LA)점수를 이용하여 비교하였다. 양 군의 만족도를 측정하여 비교하였다. 결과: 최종 추시에서 동통과 기능 점수는 향상되었으나 통계적으로 의미있는 차이는 없었다(p>0.05). VAS 동통 점수, ADL 일상 생활 지수, UCLA 점수, 만족도는 차이가 없었다(p>0.05). 결론: 중범위와 대범위 전층 회전근 개 파열에서 관절경 하의 봉합술과 소절개 봉합술은 VAS, ADL, UCLA점수에서 통계적으로 의미 있는 차이가 없었으며, 비슷한 임상적 결과를 보였다.