SiO₂ Wick을 使用한 Heat Pipe의 傳熱特性에 관한 硏究

全哲昊,徐海成 동아대학교 공과대학 부설 한국자원개발연구소 1985 硏究報告 Vol.9 No.1

Cu heat pipe with SiO₂ sintered wicks type capillary structure and distilled water as the working fluid was studied in the heat transfer rate range of 60W to 180W. Analysis resistances are considered in the pipe wall at the condenser and evaporator, in the fluid gap between pipe wall and capillary structure, at liquid vapor interface, and in the vapor region. The results are as follows. 1) Thermal resistance of wick had larger than any other thermal resistance and thermal resistance at pipe wall, interface, vapor region can usually be neglected 2) Increase the heat transfer rate and vapor temperature, temperature difference of evaporator were increased but temperature difference of vapor path were not changed.

Tablet형 시편의 성형밀도와 그의 종회비와의 관계

김해두,전병세 慶南大學校 附設 工業技術硏究所 1988 硏究論文集 Vol.6 No.-

알루미나의 성형밀도에 영향을 줄 수 있는 인자로서 종횡비(Aspect ratio : 높이, 직경)가 연구되었으며 alumina 분말을 지름이 서로 다른 3가지의 hardened steel die (6.0mm 11.0mm, 25.4mm diameter)에 넣어 세가지의 압력(41072 psi 39291 psi, 2376 psi)을 가하여 시편을 성형하였으며, 성형밀도는 수은 밀도계(mercury balance)로 측정하였다. 시편의 성형 밀도를 종횡비에 plot함으로서 종횡비가 성형밀도에 영향을 미치는 인자 임을 증명하였다. The aspect ratio (height / diameter) of the pressed compact was studied as a factor which can influence the pressed density of alumina. The compact were pressed under the pressures (41072psi, 39291 psi, 2376psi) in the hand steel dies (6.0mm, 11.0mm, 25.4mm dia). The pressed density was measured with the mercury balance. By plotting the pressed density against the aspect ratio, it was shown that the aspect ratio is a factor which influences the pressed density.

가스저장탱크에서 가스저장량의 퍼지 제어 방식

이해영,추준욱,김교형 嶺南大學校 工業技術硏究所 1998 工業技術硏究所論文集 Vol.26 No.2

This paper suggests a fuzzy control algorithm which manipulates the quantity of gas in a gas storage tank to a given reference value. Fuzzy control rules proposed in this paper are divided into two groups. The first is to treat the quantity of gas in a gas storage tank, and the second is to manipulate the quantity in pipe which is utilized in moving gas from gas source to a gas storage tank. Fuzzy control rules to treat two control problems mentioned above are designed independently by investigating several special points having inherent features for given assumed possible response characteristics in the sense of common-sense and engineer's technical knowledge. In order to observe the validity of fuzzy control algorithm for manipulating the quantity of gas in a gas storage tank suggested in this paper, computer simulations are done for three cases, which the quantity of generated gas and the required quantity in load have time-varying patterns. Computer simulation results show that fuzzy control rules designed in this paper are well operated for every case.

단지무우 改良을 爲한 實用形質의 選拔指標에 關한 硏究

金翰琳,吳翰俊 濟州大學校亞熱帶農業硏究所 1991 亞熱帶農業硏究 Vol.8 No.-

단지무우(Raphanus sativus L. var. hortensis Baker f. gigantissimus Makino)의 選拔을 效率的으로 遂行하기 위하여, 母系選拔法으로 2回 選拔한 단지무우 23系統으로 試驗을 實施하고, 이들에 대한 實用形質을 調査하여 遺傳率. 遺傳相關, 表現型相關, 環境相關 및 經路係數를 究明한 結果는 다음과 같다. 1. 系統間에 있어서 葉數· 葉柄의 길이· 根長· 根徑· 根形指數· 抽根長 및 根重은 高度의 有意性이 있고, 葉長· 乾葉重· 葉缺刻數 및 岐根數는 有意性이 없었다. 2. 遺傳率은 乾葉重· 根重· 葉數가 크고, 根形指數· 根長· 葉柄의 길이·抽根長· 根徑이 中間程度이며, 葉長· 岐根數· 葉缺刻數는 작았다. 3. 形質相互間의 遺傳相關·表現型相關과 環境相關의 크기에는 一定한 傾向이 없었고, 一般的으로 遺傳相關은 表現型相關보다 높았다. 遺傳相關에 있어서 根重은 葉數· 根徑 및 岐根數와 正의 相關關係가 높아서 이들 形質이 增加할수록 根重도 增大되었다. 表現型相關에 있어서 根重은 乾葉重 및 根徑과 높은 正의 相關關係가 높아서 이들 形質이 增加할수록 根重도 增大되었다. 表現型相關에 있어서 根重은 乾葉重 및 根徑과 높은 正의 相關關係가 있고, 環境相關에 있어서는 根重과 乾葉重 및 抽根長과 正의 相關關係가 높았다. 4. 根長 및 岐根數가 根重에 直接미치는 效果가 크며, 根重과 相關度가 높은 根徑에서는 岐根數에 의한 間接效果가, 그리고, 抽根長에서는 根長에 의한 間接效果가 컸었다. 以上의 結果에서 根徑, 岐根數 및 葉數가 根重에 크게 영향을 주어, 단지무우의 收量을 위한選拔에 이들이 指標形質로 思料되며, 根重의 遺傳率도 크므로 收量에 대한 選拔의 效果가 기대된다. This study was conducted to estimate genotypic, phenotypic and environmental correlations, heritabilities and path coefficients of agronomic characters using 23 lines of Danji radish (Raphanus sativus L. var. hortensis Baker f. gigantissiumus Makino) which were selected two times by maternal selection. The results obtained ware summarized as follow ; 1. The number of leaves per plant, the petiole length, the root length, the diameter of root, the root shape index, the root part above ground and the root weight had significant differences among the lines, but the leaf length, the weight of dry leaves, the number of parted leaflets and the number of branched root had not. 2. The heritability estimates for the weight of dry leaves, the root weight and the number of leaves per plant were high, those of the root shape index, the root length, the petiole length, the root part above ground and the diameter of root were medium, and those of the leaf length, the number of branched root and the number of parted leaflets were small. 3. The genotypic, the phenotypic and the environmental correlation coefficients between the characters had no definite tendency, that is, the high estimates in the genotypic correlations were not always high in the phenotypic or in the environmental. The genotypic correlations were generally higher than the phenotypic. In the genotypic correlation, the root weight had highly positive correlations with the number of leaves per plant, the diameter of root and the number of branched root, i.e. the root weight increased with increasing these characters. In the phenotypic correlation, the root weight highly related with the weight of dry leaves and the diameter of root. The environmental correlations between the root weight and the weight of dry leaves or the root part above ground were highly positive. 4. The directs effect of the root length and the number of branched root on the root weight were high. The indirect effects of the root part above ground via the root length, that of the number of branched root via the diameter of root which had high correlations with the root weight were high. As the result above-mentioned, it was discovered that the diameter of root, the number of branched root and the number of leaves per plant had large influences upon the root weight, and it was thought that the selection of Danji radish for the yield would be effective as the heritability estimates of the root weight was high.

內部熱源을 갖는 直方體의 傳熱特性에 관한 硏究

朴春根,全哲昊,徐海成 동아대학교 공과대학 부설 한국자원개발연구소 1984 硏究報告 Vol.8 No.2

A numerical and experimental study have been performed on the heat transfer in rectangular solid owned heat source. The effects of thermal conductivity k, heat transfer coefficient h, temperature of surrounding fluid To and the rate of heat flow Q were studied numerically by F. E. M. The experiment were studied by given rectangular solid. The results of F. E. M. and experimental are as follows. 1) The F. E. M. to calculate the temperature distribution in rectangular solid showed good agreement with experimental. 2) Thermal conductivity influenced strongly temperature distribution in the solid but heat transfer cofficient influenced only surface. 3) Temperature gradient in the solid was unconcerned by temperature of surrounding fluid and rate of heat flow but temperature in the solid changed at a fixed rate.

正方形 DUCT內 亂流流動의 熱傳達에 관한 硏究

朴春根,全哲昊,徐海成 동아대학교 공과대학 부설 한국자원개발연구소 1983 硏究報告 Vol.7 No.2

A numeical and experimental study has been performed on heat transfer in square duct. The effects of distant P between dry solides and Reynolds number were studied numerically by Finite Element Method(F.E.M.) The experiment were studied according to F.E.M. analysis by Universal Digital Measuring system. The results of F.E.M. analysis and experimental are as follows. 1) Comparison between mumerical and experimental results showed good agreement. 2) Heat transfer increases according to decrease of the P/D ratio and increase of H/L ratio too.

플래쉬형 A/D 변환기를 위한 간단한 구조의 고속 비교기 설계

潘在景,方駿鎬,曺海豊 全北大學校 1992 論文集 Vol.34 No.-

A Flash A/D converter has many comparators for the high speed conversion operation, and its high performance can be achieved by the comparator with good characteristics. When the comparator is used in Flash A/D converter, the improved characteristics of the comparator are restrained by its size and power consumption. In this paper, a high speed CMOS comparator with simple architecture has been designed and simulated using a standard 1.5[㎛] processing parameter for the Flash A/D converter. The characteristics of the designed comparator are improved by using internal biasing circuits and the CMOS complementary gain stage. This comparator can be operated in a few nano second and have a small size achitecture.

Integration for Heterogeneous Manufacturing Information Systems Based on Semantic Entity

Song Yu-chuan,Xiong Jun,LI Xian-wang,Chen Xue-hai3 보안공학연구지원센터 2016 International Journal of Smart Home Vol.10 No.9

To support semantic integration for heterogeneous information systems in manufacturing enterprises, based on semantic gateway, the concept of semantic entity is defined, and the semantic entity-based integration method is studied. Semantic entity sets up conceptual structure by aggregating semantic concept from semantic gateway, and builds dynamic conceptual structure through adding or removing its general concept. By means of key business data, semantic entity identifies business object and obtains business data from its application system, and then instantiates concept structure. Based on instantiation, semantic service can obtain parameters data from business object instant, and satisfies the interface contract. Semantic entity captures data changes of business object, and then establishes status-based integration rules, defines algorithm logic of rules. By instantiating concept structure aimed to specific application system and invoking semantic service, the integration activities among information systems come true. This work has been verified by prototype system, and attained expected integration effect.

단일 사례 사격선수의 집중루틴 훈련의 효과

장덕선,김병준,구해모,신동성 한국스포츠심리학회 2004 한국스포츠심리학회지 Vol.15 No.1

본 연구는 소총사수 P의 집중력 훈련에 관한 것이다. P 선수는 만 21세의 남자선수로서 운동경력은 8년이며, 10M 공기소총이 주종목이다. 집중력훈련은 단일사례실험 중 가장 단순한 시계열 설계인 AB 설계를 적용하였다. A단계에서 집중력, 주의력 질문지가 1-2주 간격으로 4회 반복측정 되었으며, B단계는 7월-10월까지 집중력 훈련이 진행되는 기간으로 개별면담과 질문지 측정, 수행평가를 위한 시합기록이 수집되었다. 집중력 질문지는 1개월에 1회 측정되었고, 주의력 검사지는 집중훈련 전과 후에 각각 한차례 시행되었다. 집중 루틴은 선수의 개인적 습관과 장점을 최대한 존중하여 훈련과 최고시합 때 습관적으로 하는 행동과 생각을 포함시켜 상당한 시합 부담 상황에서도 최고시합때의 행동과 생각의 흐름을 유지할 수 있도록 강력한 의미를 가진 행위와 키워드로 구성하였다. 완성된 루틴 프로그램은 4개월 훈련 후 집중력과 주의력, 수행평가를 실시하였다. 훈련결과 루틴 훈련은 집중조절 능력을 향상시켰으며, 주의유형은 긍정적인 형태는 증가하고 부정적 형태는 감소하였다. 수행 기록은 루틴 훈련 과정에서 출전한 5회 시합에서 모두 결선에 진출하므로서 수행향상에도 기여한 것으로 밝혀졌다. This study is about a concentration training of a rifle Marksman, P, The male Marksman P is 21 years old, and has played a rifle for eight years. His major is 10M air rifle. We apply AB design which is the simplest time-series design among single case experiments. In A step, we have applied the questionnaire for examining the ability of concentration and attentiveness for four times at an interval of 1 or 2 weeks. In B step, we developed a programme for improving the concentration training and applied it to the player. During the training in B step, which had continued from July to October, we have collected individual interviews, survey, records of games in order to evaluate achievement. The questionnaire for concentration has been served once a month, and the TAIS has been operated once each time before and after the concentration training. The concentration routine is directed to the way of considering the athlete's personal habit and merit most. Therefore, the concentration routine includes the essential matters of habitual acting and thought in ordinary training and in the final match. The concentration routine is consist of powerful meaningful movement and keyword in order to maintain the stream of movement and thought at the final match even though the Marksman is under the heavy pressure of the game. The practice evaluation has been done by a completed routine programme after the four-month-training. After examining the result of the evaluation, the concentration training improves the ability of controlling concentration. The positive type of TAIS is increased and the negative type is decreased. About the record of achievement, the player had advanced to the final once before the training, on the other hand, advanced to all the five final matches after the training. Consequently, it is discovered that the concentration training contributes to the achievement.

Water and carbohydrate levels at different developmental stages and dynamics in hibernating pupae of Pieris melete (Lepidoptera: Pieridae)

Hai-Jun XIAO,JunHui CHEN,Chao CHEN,Fang-Sen XUE 한국곤충학회 2015 Entomological Research Vol.45 No.5

For insight into the physiological indicators of diapause in Pieris melete, water and carbohydrate (glycogen and trehalose) levels were measured under both natural and laboratory conditions. The highest water content (3.71–3.79 mg/mg dry weight) was found in larvae and developing pupae, which was substantially higher than in diapausing pupae (2.59 mg/mg dry weight). Water content was almost stable during diapause, except for individuals approaching diapause termination (3.43–3.58 mg/mg dry weight). The total carbohydrate level was significantly higher in pre‐pupae (47.41 μg/mg) compared to larvae (22.80 μg/mg) and developing pupae (21.48 μg/mg). The highest level of trehalose was detected in winter diapausing pupae, and no trehalose was found in larvae or developing pupae. Levels of glycogen were highest in pre‐pupae and lowest in diapausing pupae. Levels of total carbohydrate decreased as diapause proceeded, and no significant changes were found in trehalose levels for diapausing pupae under natural conditions or treated for 60–90 days at 5°C. Pupae treated at 20°C for 60–90 days had significantly lower levels of trehalose than those treated for 30 days. Glycogen content was relatively stable at 5°C, but increased after treatment under natural conditions and 20°C for more than 60 days. These results suggest that the dynamics of water and carbohydrate levels are potential physiological diapause indicators, which show metabolic differences between trehalose and glycogen during diapause development.