관상동맥질환자에서 경흉부 도플러 심초음파를 이용한 좌심실 확장기 기능의 평가 : 좌심실 확장기 장애 형태에 따른 분류

전희경,윤호중,유기동,박지원,전두수,정욱성,채장성,김재형,최규보,홍순조 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.1

家畜排泄物 콤포스트化 有效利用에 關한 硏究

洪志亨,全炯柱,朴又龍,崔秉旻,金在煐 順天大學校 1983 論文集 Vol.2 No.1

家畜排泄物의 堆肥化 작업체계의 工學的인 局面은 畜産經營의 畜産物 生産性, 에너지保存, 公害防力및 勞動力 節約에 密接한 關係를 갖고 있는 바이다. 그러나 韓國에 있어서 現在 畜産業의 飼養規模와 飼育頭數는 每年 增加하는 傾向을 나타내고 있으나, 傳統的인 家畜排泄物의 堆肥化處理 加工作業上의 問題點에 關한 硏究資料는 거의 없는 實情으로 堆肥化 작업체계 改善確立이 切實히 要求되고 있다. 따라서, 本硏究의 目的은 家畜排泄物 堆肥化 작업체계상의 工學的인 諸問題點을 調査分析하고 이에 對한 現況을 評價하여 改善方案을 模索하기 위한 基本資料를 提供하기 위해 遂行되었으며 調査分析 結果를 要約하면 다음과 같다. 1. 畜産農家의 家畜排泄物 處分方法으로는 大部分이 自然乾燥, 堆積, 嫌氣的 固形堆肥化에 依하여 遂行되고 있어 家畜糞尿에 의한 公害가 深刻해 지고 있었다. 2. 野積堆肥化 가공작업체계에 있어서는 트랙터에 附着된 前後作動式 로우더가 바람직하다. 3. 好氣性 野積堆肥化 加工作業에 따른 良質의 腐熟堆肥를 얻기 위해서는 外部氣溫에 따라 適正通氣量을 維持하기 위해 3∼7日 間隔으로 混合攪拌해야 되며 氣象條件에 의한 影響을 防止하기 위하여 堆肥作業物質의 表面을 비닐 等으로 덮거나, 더운날에는 加水를 해야할 것이 要望된다. 4. 堆肥化 加工作業體系의 基本段階別로 이루어지는 畜産農家는 거의 찾아 볼 수가 없었다. 5. 堆肥化加工 過程은 畜産農家周圍의 콤포스트센타에서 全體農家가 地力增進과 公害防止를 위해 參與할 수 있는 總合的이고 協同的인 加工作業體系로서 一貫性있게 遂行되어야 할 것으로 思料된다. There was almost no livestock farms to follow the basic stage in composting operation system. Composting disposal process should be performed successively an integrate cooperative operation system at compost center which is participated in all farmers near the livestock farms for the purpose of land improvement and pollution abatement. Well matured compost which is resulted from aerobic windrow solid composting should be turned at 3 to 7 days to insure abequate aeration according to the ambient temperature. The compost material should be covered with vinyl sheets etc. to avoid the effect of climatic condition.

다관절 로봇의 경로계획에 관한연구

전형주,정회범,심재홍 순천대학교 공업기술연구소 1990 工業技術硏究所論文集 Vol.4 No.-

In this study, the methods of the trajectory planning which satisfy the given constraints in the control systems, have the minimum segment­transition time, and reduce the deviation from straight­line path were investigated. The study was carried out in the joint space on the transition motion between two points and on the several segment motion along multiple points. The kinematic model of Rhino XR­2 robot was adopted in the simulation for the trajectory planning.

유도선수들의 스포츠자신감 수준이 귀인형태에 미치는 영향

홍재표,차정훈,전승훈 한국스포츠리서치 2005 한국 스포츠 리서치 Vol.16 No.2

The present study was designed to examine the effect of sport-confidence on attributional perceptions across male and female fencers. Judo athletes reported their sport-confidence, attribution perceptions on Sport-Confidence Inventory. CDSⅡ(Causal Dimension Scale Ⅱ) According to the previous research findings related to the theme of the study, it was hypothesized that the independent variables of trait sport-confidence. state sport-confidence influence the dependent variable of attributional perceptions. and the relationships between the two kinds of variables were examined using two-way ANCOVA. The implications of the study are as follows : Firstly. Trait sport-confidence and state sport-confidence of judo athletes significantly affected the locus of contorl dimension. Secondly. Trait sport-confidence and state sport-confidence of judo athletes significantly affected the stability dimension. Thirdly, Trait sport-confidence and state sport-confidence of judo athletes significantly affected the contro lability dimension.

활성탄 부착 Meltblown(M/B) 부직포를 이용한 방진마스크용 여과재 제조기술개발

홍영기,전재완,이재달,송인희 호서대학교 반도체제조장비국산화연구센터 2001 반도체장비학술심포지움 Vol.2001 No.-

본 논문에서는 고성능 활성탄의 악취 및 유해가스 흡착효율과 멜트브로운(M/B)부직포의 여과성능에 의한 복합적인 고기능 방진특성을 갖는 활성탄 부착 M/B 국산화 여과재를 제조개발하였다.고성능 활성탄은 고순도의 일반활성탄에 금속염, 유기물 등을 담지시켜 활성화시킨 활성탄이고, M/B여과재의 웹(web)제조조건은 M/B 방사기에서 방사온도 250℃, 방사속도 150m/sec, 고온공기온도 250℃ 그리고 DCD(die to collector distance) 20㎝가 적합함을 알 수 있었다.또한 M/B 여과재에 활성탄부착은 열롤러시스템에 의한 열적 이용하여 균일한 분포의 점접착결합구조를 갖도록 하였고, 개발된 복합기능 여과재가 방진마스크용 여과재로의 이용이 가능하다는 것을 분진포집효율, 투과율, 흡기저항 등 여과재 성능기준실험 결과를 통해 확인하였다.

곁사슬을 갖는 새로운 액정중합체의 합성 및 특성

전옥철,김윤준,류범영,최재곤,조병욱,홍진후 조선대학교 생산기술연구소 1999 生産技術硏究 Vol.21 No.1

A series of wholly aromatic polyesters with side chains were synthesized by solution polycondensation from 2,5-dialkoxyterephthaloyl chlorides with the corresponding diol. The polymers showed the schlieren textures which is indicative of a nematic phase above their melting temperature. The inherent viscosities (η_(inh)) measured at 35℃ in phenol/p-chlorophenol/1,1,2,2-tetrachloroethane were 0.56-0.98 dℓ/g. The glass transition temperature (T_(g)) and melting temperature (T_(m)) decreased with increasing the length of the alkoxy side chain. Initial decomposition temperatures in TGA occurred at 338 ~ 363℃ in N₂ gas and thermal stability of polymers decreased with increasing the length of the side chain.

자동차 공조용 핀형 열교환기의 성능특성에 관한 연구

홍경한,전상신,이승재,박찬수,권일욱,김재열,김병철,하옥남 한국공작기계학회 2004 한국생산제조학회지 Vol.13 No.4

Fin-tube type(Fin-type) heat exchanger has been tested in order to replace the heat exchanger of parallel flow type(P.F-type) which is now widly used in automobile air conditioning system. The following conclusions are drawn by the comparison of the characteristics of the heat exchangers. Evaporator and condenser capacities and COP(Coefficience of performance) were varied as with the compressor speed, outdoor air temperature and air flow rate changed, which much influenced on the characteristics of the air conditioning system. Evaporator and condenser capacities were increased with increasing compressor speed and outdoor air temperature. Evaporator and condenser pressures of Fin- type were decreased by 7% and 5% respectively compared with those of P.F-type. The COP of Fin-type was decreased with increasing outdoor air temperature and compressor speed. The COP of P.F-type was decreased by 14% compared with that of Fin-type.

정신병과 치매로 발현한 양측 내경동맥 폐색증 환자 1예

전상범,권순억,이상암,이재홍 대한치매학회 2003 Dementia and Neurocognitive Disorders Vol.2 No.2

Bilateral internal carotid artery (ICA) occlusion is a rare cerebrovascular disease. Chronic ICA occlusion is not always associated with neurological deficits, but it can lead to visual disturbance, TIA, non-fatal stroke, and catastrophic stroke presenting with coma A 60-year-old man with bilateral ICA occlusion who presented with psychosis and dementia followed by sudden loss of consciousness is described. His clinical history and MRI findings suggested vascular dementia, but his psychotic features were difficult to explain without bilateral ICA occlusion F^(18)-FDG PET findings mimicked typical Alzhermer's disease and caused diagnostic confusion. To our knowledge, this is the first reported case of bilateral ICA occlusion associated with psychosis and dementia

병원 근로자들의 고용형태에 따른 직무 스트레스와 삶의 질의 관계

전은숙,이강숙,이선영,유재희,홍아름 大韓産業醫學會 2009 대한직업환경의학회지 Vol.21 No.1

목적 본 연구는 병원에 종사하는 정규직 비정규직 근로자의 직무스트레스와 삶의 질 수준을 파악하고 직무스트레스와 삶의 질과의 관련성 및 삶의 질에 영향을 미치는 요인을 규명하기위해 수행되었다 방법 자기기입형 설문조사를 실시하였으며 정규직 172명 비정규직 189명이 최종 분석하였다 일반적 특성과 한국인 직무스트레스 측정도구-단축형 (Korean occupational stress scale short form) 삶의 질 측정을 위한 도구 WHOQOL-BREF를 사용하였다 결과 정규직에 비해 비정규직에서 직무스트레스 수준이 높았다 정규직은 직무요구도와 직장문화의 항목에서 비정규직은 직무자율성 직무불안정성 보상부적절의 항목에서 직무스트레스 요인이 유의하게 많았다 삶의 질수준은 정규직 근로자에서 유의하게 높았으며 심리적 영역 사회적 영역 생활환경 영역에서 비정규직보다 유의하게 높은 수준을 보였다 결론 정규직과 비정규직 근로자의 직무스트레스 요인과 삶의 질 수준은 달랐다 고용형태를 막론하고 직무스트레스는 삶의 질에 부정적인 영향을 미치고 있었으며 비정규직은 직장문화로 인한 스트레스 요인이 많을수록 삶의 질이 낮았다 따라서 병원근로자의 삶의 질 향상을 위하여 적절한 관리 혹은 프로그램이 제공되어야 할 것이며 특히 비정규직 근로자의 직무스트레스를 일으키는 요인들에 대한 적절한 관리가 필요할 것이다 Objective This study was conducted to evaluate the relationship between job stress and quality of life for hospital workers by type of employment Methods Data were obtained for 361 workers in a large hospital 172 of whom were categorized as typical workers defined by permanent employee and 189 of whom were categorized as atypical workers defined by fixed term contraction Job stress was assessed using the Korean Occupational Stress Scale Short Form and the World Health Organization Quality of Life-BREF Questionnaire Results Atypical workers had significantly higher scores for job related stress in the domains Of insufficient control over work job insecurity and lack of reward in the workplace compared with typical workers who had higher scores for stress in the domains of job demands and occupational climate Test scores also indicated that typical workers had a significantly better quality of life than atypical workers especially in terms of mental health social relationships and environment Conclusion These findings suggested that factors contributing to job-related stress were different between typical and atypical hospital and typical workers are likely to have a better quality of life

룸서비스 부서의 마케팅전략 활성화 방안에 관한 연구 : GH호텔 룸서비스 부서의 사례를 중심으로 Focus on the Room Service Department of GH Hotel

전홍진,손재근 한국관광정보학회 2003 觀光情報硏究 Vol.- No.13

The room service department is not merely a part of the food & beverages department but also instrumental in improving the image of the hotel and managing customers compared to the sales department. In addition, the business sphere of the room service department involves more than the simple work of supplying customers in guest rooms or attached business places with food & beverages; it also provides services for special guest floors and mini bars, as well as varied services related to customers. The image of a hotel considerably improves with enhancements in the room service department, i.e., providing additional support for welcoming distinguished guests, installing operating lounges on distinguished guest floors, and managing long-term lodgers. For example, the department has been in charge of cutting fruit or providing wine or other special amenities for guest rooms in accordance with the requests of departments concerned or certain kinds of guest rooms. Given the full scale marketing activities of hotels in targeted markets as a result of the deregulation of the hotel market, the image of the hotel and customer satisfaction significantly affect the hotels profits and successful operation. Effective operation and systematic study are therefore necessary to enable the room service department to implement marketing successfully, keeping in mind the flexible administration of the department. Scientific and reasonable marketing should be executed to maximize the profits of the hotel by securing faithful patrons through total customer satisfaction and meeting customers highly graded, varied, differentiated, and individualized requests. The plan to activate marketing strategies for the room service department is summarized below, which integrates the characteristics and business environment of the department. The commodity strategy deals with the development of various food & beverages and regular change of menu in response to customers preferences. The cost can be also reduced when damage to utensils is minimized. In particular, the survey on and development of Oriental food including Korean is essential. Snacks and pasta should also be added and appropriate drinks for high-class guest rooms developed. On the other hand, the price strategy includes the reasonable and effective management of manpower since labor makes up the bulk of the costs. Prices should be settled after the prices of rival companies are compared and analyzed. Foreign utensils and equipment should be replaced with Korean ones to reduce costs. In addition, the logistics strategy involves the effective use of elevators to provide quick services with prior consultations with the departments concerned. The sales promotion also includes PR for the hotel and its general room services through invitation letters sent to customers. The menu should be set on the table in such a way that it is easily noticed by customers in guest rooms. The sales promotion can also use the PR instruments distributed to customers who order lunch at the Fitness Club or Sauna. Likewise, the process management strategy requires a long-term education program for both regular and contractual employees to develop their credentials and abilities. Such program is necessary in minimizing trial and error in providing services and offering only standardized services. Service policies of the hotel should be drafted and made available to every employee, service manuals developed, and services standardized. The strategy for managing physical evidences involves the active acceptance of customers tastes and trends and improvement of the physical environment of the room service department. In particular, the environment should be improved for the benefit of both the hotel and its customers using the 3R environmental policy (Reduce, Recycle, and Reuse). Finally, the strategy for managing employees includes nurturing and developing their linguistic abilities. Good service can only be provided through fluent,, prudent, and polite language when communicating with customers.