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공무원의 여가활동참여에 따른 생활만족도 연구 : 대전광역시를 중심으로
옥해안,강병길 牧園大學校 1999 論文集 - 牧園大學校 Vol.36 No.-
The purpose of this study was (1) to describe leisure activity and life satisfaction Among Public Officers in Taejon City, (2) to investigate the relationship between sports participation, demographic characteristics and life satisfaction among Public Officers, living in Tae-Jon City. Two hundred thirty subjects(male 141, female 201) were selected using the systematic stratified cluster random sampling among the participants working in the Tae-Jon City. The instrument, which evidenced acceptable internal consistency (.62-.84) and test-retest reliability (.60-.83), was formulated by adapting existing instruments and developing new items. The data were collected from a self-administrated questionnaires, and was analysed through Mean, Frequencies, ANOVA, and Multiple regression. The finding of this study are as follows: First, there were relationships between leisure activity and life satisfactions. Gender, income, working field, and degree of health were the variables most significantly associated with life satisfaction. Second, sex-related attitudes were associated with sexual accountability, discussions about sex-related topics. Friends and magazine were seen as the most acceptable and easily obtainable sources of sex-related information, while doctors were seen as the most reliable source of sex-related information.
製造企業의 經營環境에 관한 硏究 : 김해지역을 중심으로
金東沃,孫炳基,金榮九,李道和,長英壹,崔容銑 인제대학교 1994 仁濟論叢 Vol.10 No.2
At the threshold of localization era, there is a great need to determine local economic development agenda. But current paucity of data regarding local firms' operations can be a hindering factor to achieve above objective. This study aims to provide such a data which can be used for setting local economic policy of Kimhae area. The study was conducted by administering survey questionnaires. The sample is 34 small sized manufacturers with less than 300 employees in Kimhae area. The content of survey includes General Management, Personnel and Labor Relations, Marketing, Production, Finance, Accounting and MIS. The results of survey revealed that current managerial practices in general showed sizable gap with desired one, which is mandated by national goal of reinforcement of competitiveness of small and medium sized firms.
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.
이광옥,송병호,배상현 조선대학교 전자정보통신연구소 2002 電子情報通信硏究所論文誌 Vol.5 No.1
On authentication protocol used at existing mobile communication systems, there was a significant problem of user's anonymity when wireless connection was accomplished. As it used a signature confirmation of signer by a opened confirmative key, limited protocol guarantees a anonymousness of signer as possible as use of closed signature key and network renews by a part of section toward random numbers both selecting it guarantees anonymousness in wireless section line a strengthening stability than a pre-existing formula.
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최연옥,정병호,조금배 조선대학교 에너지.자원신기술연구소 2000 에너지·자원신기술연구소 논문지 Vol.22 No.1
Using Observer, on the sensorless vector control system is a novel techniques for modern induction motor control. In this paper, a speed estimation algorithm of an induction motor using an extended kalman filter was proposed. Extended kalman filter can solve the problem, that have steady state error of estimated speed in flux and slip estimation method. The extended Kalman filter is employed to identify the speed of an induction motor and rotor flux based on the measured quantities such as stator current and DC link voltage. In order to confirming above proposal, computer simulation carried out control drives for using Matlab Simulink and show the effectiveness of the control drives for induction motor speed estimation.
文炳圓,李宗玉,崔周鎬 진주산업대학교 1992 論文集 Vol.31 No.-
勞動力 不足으로 누에 飼育에 어려움을 겪고 있으므로 全齡 人工飼育에 의해 生産하므로 飼育의 機械化 할 수 있는 生産 體系確立 可能性을 究明코자 本 試驗을 實施하여 그 結果를 要約하면 다음과 같다. 1. 털털이율은 低溫에서 높은 傾向이었으나 中國種은 日本種보다 낮았다. 2. 起蠶率은 溫度에 큰 差異는 없었으나 日本種이 약간 높았다. 3. 起蠶體重은 高溫에서 높은 傾向이었으며 品種間에는 큰 差異가 없었다. 4. 經過日數는 高溫에서 짧았으며, 日本種보다 中國種이 짧은 傾向이었다. 5. 化 比率은 低溫에서 현저히 낮았으며, 日本種보다 中國種이 짧은 傾向이었다. 6. 全繭重, 繭層重, 繭層比率은 高溫에서 현저히 높은 傾向이었으며, 品種間에는 差異가 없었다. 7. 繭長은 암·숫공히 日本種이 길었으며 繭幅은 中國種이 넓은 傾向이었다. The purpose of this study is to examine the possibility of mechanized breeding by an experimentation to cope with the difficult situation of labor shortage in silk-worm breeding Tile results of experiment are as follows ; l. The vegetation ratio tended to be higher in the higher plots and showed lower in the Chinese species than in the Japanese species. 2. The ratio of newly exuviated larva was not affected by the temperature and seemed to become high in the Japanese species relatively. 3. The newly exuviated weight was heavy in the hot temperature p1ots relatively. 4. The larva progress term was short relative1y in the plots of hot temperature and Chinese species respectively. 5. The puration rate was low relatively in the plots of low temperature and Chinese species respectively. 6. The whole cocoon shell weight and percentage of cocoon shell tended to be higher in the hot temperature plots respectively, and were not affected by the difference of species. 7. The cocoon length was long in the Japanese species, and the cocoon width was broad in the Chinese species.
문병주,조연상,박흥식,전태옥 韓國工作機械學會 2000 한국생산제조학회지 Vol.9 No.6
Morphological analysis of wear particles is one of useful methods for machine condition monitoring because it is well reflected in machine driving state. This paper was undertaken to apply to the condition monitoring of hydraulic piston motor. The lubricating wear test was performed under different experimental conditions using the wear test device and wear specimens of the pin on disk type was rubbed in paraffinic base oil by three kinds of lubricating materials, varying applied load, sliding distance. The four shape parameters (50% volumetric diameter, aspect, roundness and reflectivity) arc used for morphological analysis of wear particles. The results showed that the four shape parameters of wear particles depend on a kind of the lubricating materials. It was capable of calculating presumed wear volume for three kinds of mate-rials on driving time to foresee a damage condition of lubricating materials.