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김경수(Kim Kyungsu),이영신(Lee Yungsin),김용국(Kim Yongkuk),이윤배(Lee Yunbae),김판구(Kim Panku) 한국정보처리학회 1998 정보처리학회논문지 Vol.5 No.5
In this paper, we propose the method that extract shape features using the DCT(Discrete Cosine Transform) via simple invariant normalization. To retrieve effectively, we used measures, circularity and eccentricity, as filters to reduce the number of retrieved images. The experimental results show that our method is better than the methods of Fourier Descriptors and Moment Invariant for various leaf images.
국내외 농업인 천식 및 만성 폐쇄성 폐질환에 관한 고찰
김시영(Siyoung Kim),윤성용(Seongyong Yoon),김진석(Jinseok Kim),조성용(Seong-yong Cho),박현우(Hyun Woo Park),김대환(Daehwan Kim),김가영(Gayoung Kim),강지수(Jisoo Kang),김경수(Kyungsu Kim),최동필(Dongphil Choi),유석주(Seok-Ju Yoo) 한국농촌의학 지역보건학회 2023 농촌의학·지역보건 Vol.48 No.4
본 연구는 국내 농업인의 천식 및 만성 폐쇄성 폐질환을 파악하기 위해「농업인의 업무상 질병 및 손상조사」를 조사하였다. 관련된 국내연구 자료가 미비하여 국외 농업인의 천식 및 만성폐쇄성 폐질환 연구결과를 찾아보았고, 그 결과. 국내 농업인들의 천식 및 만성 폐쇄성 폐질환 유병률은 국외 연구 결과들보다 낮게 나타났다. 실제 국내 농업인의 호흡기 질환 유병률은 더 높을 수 있으므로, 추가적인 연구가 필요하고, 호흡기 질환 예방대책이 마련되어야 한다. Objective: Farmers are known to have high prevalence of asthma and chronic obstructive pulmonary disease(COPD). This study aims to investigate the current status of asthma and COPD in domestic and foreign farmers with the ultimate goal of raising awareness of asthma and COPD among farmers and contribute to supporting evidence for the prevention of respiratory diseases in farmers. Methods: The study utilized data from the Farmer’s Occupational Disease Survey, conducted by the Rural Development Administration, to determine the prevalence of respiratory diseases in domestic farmers. The prevalence of asthma and COPD in overseas farmers was evaluated by researching other foreign studies and articles. Results: The prevalence of asthma and COPD in domestic farmers was less than of foreign farmers’. The prevalence of asthma in domestic farmers was high as upto 8.4% and COPD upto 5.5%. Studies from Europe and America showed prevalence of asthma in farmers high as upto 14.8% and COPD upto 17.1%. Conclusions: This study conducted an investigation using the Survey on Occupational Diseases and Injuries in Farmers to understand the current status of asthma and COPD in domestic farmers. Due to a lack of relevant domestic research, we examined and compared with the research results on asthma and COPD among overseas farmers. Further research is necessary and preventive measures for respiratory diseases need to be developed.
농업인의 안전활동을 위한 ICT 기반의 농업시설 안전관리 시스템에 관한 연구
김인수(Insoo Kim),김경란(Kyungran Kim),김효철(Hyo-Cher Kim),서민태(Min-Tae Seo),김경수(Kyungsu Kim),고명선(Myungsun Ko) 대한인간공학회 2018 大韓人間工學會誌 Vol.37 No.4
Objective: This study proposed a system for safe management of agricultural facilities whereby safety accidents of farmers are prevented from harmful factors of agricultural facilities and relevant hazardous situations, and efficient reaction is made possible when an accident occurs. Background: Recent development of information and communication technology (ICT) brought groundbreaking development of cutting-edge technologies such as the internet of things (IoT) and ubiquitous sensor network, and application of such technologies is expanding to the area of industrial safety. In particular, accidents from the hazardous environment surrounding agricultural facilities, say, from harmful gases, are frequently taking place and therefore development of services for safe farming work is required. Method: This study examined the types of safety accidents related to agricultural facilities occurring during farming work and designed a ICT-based system for safe management of accidents. Results: This study presents a model of such system and the model has the following functions: detection of harmful environment and conditions dangerous to farmers with sensor technologies; communication network technology for prevention of and fast coping with accidents; and user interface aimed at monitoring harmful environment and dangerous situations. Conclusion: The ICT-based system for safe management of agricultural facilities proposed in this study is expected to be applied as an application technology for safe agricultural activities. Application: The outcome of this study will be useful to develop a convergent ICTbased system for the prevention of safety accidents related to agricultural facilities.
비닐하우스 작업자의 서열 스트레스 경감을 위한 보텍스 튜브 적용 냉각조끼 개발 및 평가
김인수(Insoo Kim),김경란(Kyungran Kim),서민태(Min-Tae Seo),박수인(Soo-In Park),차종진(Joung-Jin Cha),김효철(Hyo-Cher Kim),김경수(Kyungsu Kim) 대한인간공학회 2020 大韓人間工學會誌 Vol.39 No.1
Objective: This study developed working clothes using a vortex tube device to reduce the thermal stress of greenhouse workers, and evaluated the physiological effects and user satisfaction of the developed cooling vest. Background: During the summer, the inside of greenhouses causes increased physiological burden of workers due to a high temperature and humidity, causing accidents and lowering the work efficiency. As a measure to solve this problem, various working clothes to lower thermal stress have been researched and developed, but there were limitations in the development of working clothes appropriate for high temperature and humidity in greenhouses. Therefore, the development of a new agricultural working clothes is required to prevent thermal stress of workers in a warm environment. Method: To verify the thermal stress reduction effect of the farming vest applying a vortex tube device, a physiological evaluation test was performed for subjects in a climate chamber and greenhouse environment. In addition, the wearing satisfaction and field applicability of the developed working clothes was evaluated by farmers. Results: The results of analyzing the mean physiological reactions by body part in the climate chamber test, the skin temperature, mean temperature in the working clothes, mean humidity, and heartrate of the developed working clothes decreased by 2.9%, 8.1%, 35.5%, and 4.9%, respectively, compared to the existing working clothes. Furthermore, in the greenhouse environment test, the temperature in the working clothes and humidity of the developed working clothes decreased by 8.8% and 12.3%, respectively, compared to the existing working clothes. Furthermore, in wearing sense and user satisfaction survey for farmers in the field evaluation, the respondents showed positive responses. Conclusion: This study verified the effects of the agricultural working clothes applying the vortex tube technology had an effect of thermal stress reduction compared to the existing working clothes and its applicability to the agricultural work environment. Further practical research should be conducted considering the cultivation environment and the size of greenhouse facilities to develop working clothes for various work environments. Application: The results of this study are expected to be utilizable in the field of design of thermal stress reducing working clothes for greenhouse facility farm workers.
Lee, Jaemin,Kang, Tae Heung,Yoo, Wonbeak,Choi, Hyunji,Jo, Seongyea,Kong, Kyungsu,Lee, Sang-Rae,Kim, Sun-Uk,Kim, Ji-Su,Cho, Duck,Kim, Janghwan,Kim, Jeong-Yoon,Kwon, Eun-Soo,Kim, Seokho AMERICAN ASSOCIATION FOR CANCER RESEARCH 2019 CANCER IMMUNOLOGY RESEARCH Vol.7 No.2
<P>The homing of natural killer (NK) cells is often inhibited by pancreatic cancer tumors. A mesothelin-directed antibody conjugated to a cleavable NK cell—recruiting chemokine increased NK-cell infiltration of PDAC tumors, reduced tumor burden, and improved survival.</P><P>Natural killer (NK) cells are primary immune cells that target cancer cells and can be used as a therapeutic agent against pancreatic cancer. Despite the usefulness of NK cells, NK-cell therapy is limited by tumor cell inhibition of NK-cell homing to tumor sites, thereby preventing a sustained antitumor immune response. One approach to successful cancer immunotherapy is to increase trafficking of NK cells to tumor tissues. Here, we developed an antibody-based NK-cell–homing protein, named NK-cell–recruiting protein-conjugated antibody (NRP-body). The effect of NRP-body on infiltration of NK cells into primary and metastatic pancreatic cancer was evaluated <I>in vitro</I> and in murine pancreatic ductal adenocarcinoma models. The NRP-body increased NK-cell infiltration of tumors along a CXCL16 gradient (CXCL16 is cleaved from the NRP-body by furin expressed on the surface of pancreatic cancer cells). CXCL16 induced NK-cell infiltration by activating RhoA via the ERK signaling cascade. Administration of the NRP-body to pancreatic cancer model mice increased tumor tissue infiltration of transferred NK cells and reduced the tumor burden compared with that in controls. Overall survival of NRP-body–treated mice (even the metastasis models) was higher than that of mice receiving NK cells alone. In conclusion, increasing NK-cell infiltration into tumor tissues improved response to this cancer immunotherapy. The combination of an NRP-body with NK-cell therapy might be useful for treating pancreatic cancer.</P>
A Truncated Manganese Spinel Cathode for Excellent Power and Lifetime in Lithium-Ion Batteries
Kim, Joo-Seong,Kim, KyungSu,Cho, Woosuk,Shin, Weon Ho,Kanno, Ryoji,Choi, Jang Wook American Chemical Society 2012 NANO LETTERS Vol.12 No.12
<P>Spinel-structured lithium manganese oxide (LiMn<SUB>2</SUB>O<SUB>4</SUB>) cathodes have been successfully commercialized for various lithium battery applications and are among the strongest candidates for emerging large-scale applications. Despite its various advantages including high power capability, however, LiMn<SUB>2</SUB>O<SUB>4</SUB> chronically suffers from limited cycle life, originating from well-known Mn dissolution. An ironical feature with the Mn dissolution is that the surface orientations supporting Li diffusion and thus the power performance are especially vulnerable to the Mn dissolution, making both high power and long lifetime very difficult to achieve simultaneously. In this investigation, we address this contradictory issue of LiMn<SUB>2</SUB>O<SUB>4</SUB> by developing a truncated octahedral structure in which most surfaces are aligned to the crystalline orientations with minimal Mn dissolution, while a small portion of the structure is truncated along the orientations to support Li diffusion and thus facilitate high discharge rate capabilities. When compared to control structures with much smaller dimensions, the truncated octahedral structure as large as 500 nm exhibits better performance in both discharge rate performance and cycle life, thus resolving the previously conflicting aspects of LiMn<SUB>2</SUB>O<SUB>4</SUB>.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/nalefd/2012/nalefd.2012.12.issue-12/nl303619s/production/images/medium/nl-2012-03619s_0007.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nl303619s'>ACS Electronic Supporting Info</A></P>
Farm Work–Related Injuries and Risk Factors in South Korean Agriculture
Kim, Hyocher,Rä,sä,nen, Kimmo,Chae, Hyeseon,Kim, Kyungsu,Kim, Kyungran,Lee, Kyungsuk Taylor Francis 2016 Journal of agromedicine Vol.21 No.4
<P>Agriculture is known to be a risk-filled industry in South Korea, as it is worldwide. The aims of this study were to identify the magnitude of farm work-related injuries and evaluate the association between injury and possible risk factors. Farmers, including farm members (N = 16,160), were surveyed. After excluding 7 subjects with missing data in questions about injury, 16,153 farmer responses were used for the analysis. Of the 16,153 farmers, 3.6% answered having at least one farm work-related injury requiring outpatient treatment or hospitalization during 2012. The proportion of injured men (4.3%) was 1.5 times higher than women (2.9%). From an age perspective, the proportion was 1.3% of those aged 49 or below, 2.7% of those aged 50-59, 4.2% of those aged 60-69, 4.2% of those aged 70-79, and 3.1% of those aged 80 or above. We used a multivariate logistic regression analysis with a stepwise model (forward) for risk factors (gender, age, farm ownership, farm type, work years in agriculture, work months during 2012, night work experience, and work experience under the influence of alcohol). The increased risk of farm work-related injuries significantly remained associated with age, farm ownership, and experience of night work. Further studies should be conducted to consistently identify injury characteristics, especially for old farmers, considering the crop cultivation in Asian countries.</P>