• 기술사
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• 제16권1호
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• pp.48-54
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• 1983

Building management cost increases enormously as modern buildings become complicated. Lost of building eveners or managers feel the need to cut down the cost not sacrifying Comfort building environment and building safety, The ways to achieve such goal are maintaing with a few person, proper HVAC scheduling to save energy BAS's i.e the building automation system or building maintenance system, are designed to meet the goal. In korea, imported BAS's have been installed past several years. Difficulties arised in several aspects. One is extra high cost in installing BAS's because of marginal coat. Another is long settling time because it is originated from abroad. GSC/85/30 is the first trial as a korean BAS to minimize such difficulties. Even though it is a primitive system, it is a mileston of korean BAS the technics gained from developing GSCI/85/30 can be utilized to develop higher version and is now. As modern buildings become more complicated and hugy, managers owner of buildings seek for the system to manage building properly. BAS(Building Automation System or Building management system) is designed to meet the need.

• 대한전기학회논문지:전기기기및에너지변환시스템부문B
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• 제52권12호
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• pp.616-623
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• 2003

Conventional P/PI speed controller of today's servo drives should be manually tuned the controller switching set-point by trial-and-errors, which may translate the drive system down-time and loss of productivity. The adjustable drive performance is heavily dependent on the quality of the expert knowledge and becomes inadequate in applications where the operating conditions change in a wide range, i.e., tracking command, acceleration/deceleration time, and load disturbances. In this paper, the demands on simple controls/setup are discussed for industry servo drives. Analyzing the frequency content of motor torque command, P/PI control mode switching is automatically performed with some prior knowledge of the mechanical dynamics. The dynamic performance of the proposed scheme assures a desired tracking response curve with minimal oscillation and settling time over the whole operating conditions. For comprehensive comparison of traditional P/PI control scheme, extensive test is carried out on actual servo system.

• 농업과학연구
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• 제37권1호
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• pp.161-170
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• 2010

In Korea, food material industry encounters the emerging market which results from the growth of food service industry and food processing industry. Food material suppliers think that the total sales in Korean market may be around 20 trillion won. However, very small numbers of studies about Korean food material industry have been conducted. This paper analyzes the current status of food material industry and the market structure in Korea, and presents several suggestions for the development of Korean food material industry as following: building up the function of fresh-cut in production area, improving market structure, settling down the cold-chain system, enforcing the certification program for food safety.

• 한국식품영양과학회지
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• 제25권3호
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• pp.453-459
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• 1996

This study was carried out to determine the changes in quality during the drying process and the optimum drying condition for utilizing soybean curd residue. The quality criteria for soybean curd residue were acid value, peroxide value, fatty acid composition and microbial concentration. The acid values of soybean curd residue were 7.5, 4.5 and 5.9 KOH mg/g upon 12 hour drying with open-air sun, ambient-air blast and warm-air blast, respectively. The numbers of total aerobic bacteria and molds increased remarkably during drying with open-air sunlight, ambient-air blast and warm-air blast except for hot air blast. Among different drying methods, the hot air blast drying(1kg of sample) was the most effective methods, which completed in three hours. Also, the drying method demonstrated a typical drying curve ; settling down, constant rate drying and falling rate drying period were shown within one hour, from one and three hours and after three hours, respectively. Moreover, there was significant variation in the constant drying period for the quality of soybean curd residue.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2000년도 추계학술대회
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• pp.129-135
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• 2000

Four types of land use were selected for sampling and study with different characteristics of heavy metal contamination during the period from August 1998 to June 2000. A series of studies have been carried out concerning the physicochemical characteristics of the sediments settling down in a gully pot to evaluate the contamination of Pb, Zn, Cd, Co, Cr and Cu. An examination of six elements indicated that Zn, Cu and Pb were the heavy metals severely impacted by anthropogenic input in Seoul. An assessment of 60 volatile organic compounds (VOCs) in urban runoff and ground water was conducted based on samples collected from 31 sites and 12 wells, respectively, in Seoul City. The higher levels of alkyl benzenes in urban runoff indicated that Seoul areas were mainly contaminated through traffic sources.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2004년도 ICEIC The International Conference on Electronics Informations and Communications
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• pp.74-76
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• 2004

A Half-VDD Voltage(VHDD) Generator using PMOS pull-up transistor and NMOS pull-down transistor was newly proposed for low-voltage DRAMs. The driving current was increased and the power-on settling time was reduced in the new circuit. The newly proposed VHDD generator worked successfully at VDD at 1.5V and fabricated using 0.18um CMOS twin-well technology.

• 한국간호교육학회지
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• 제28권2호
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• pp.127-136
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• 2022

Purpose: The purpose of this study was to describe the career choice experiences of nursing students. Methods: A phenomenological approach was used for the study. Data were collected from September 1 to October 1, 2021, using open-ended questions in-depth interviews. Ten nursing students who had decided to find a job or complete an application to an employment institution participated in this study. Results: The four categories obtained as results were "Preparing myself," "Chosen after conflict," "Going through a tough tunnel and settling down," and "Waiting with anticipation and worry." Conclusion: This study explored the meaning and essence of the career choice experiences of nursing students. These results will provide basic data that can help nursing students make career choices.

• Journal of the korean society of oceanography
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• 제38권1호
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• pp.1-10
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• 2003

A time-series sediment trap was deployed at a depth of 1034 m in the eastern Bransfield Strait from December 25, 1998 to December 24, 1999. Particle fluxes showed large seasonal variation; about 99% of the annual total mass flux (49 g m/sup -2/) was collected during the austral summer and fall (January-March). Settling particles consisted primarily of biogenic silica, organic carbon, calcium carbonate, and lithogenic material. Biogenic silica and lithogenic material predominated settling particles, comprising 36% and 30% of the total mass flux, respectively, followed by organic carbon, 11% and calcium carbonate, merely 0.6%. The annual organic carbon flux was 5.4 g C m/sup -2/ at 1000 m in the eastern Bransfield Strait, which is greater than the central Strait flux. The relatively lower flux of organic carbon in the central Bransfield Strait may be caused by a stronger surface current in this region. Organic carbon flux estimates in the eastern Bransfield Strait are the highest in the Southern Ocean, perhaps because of the fast sinking of fecal pellets, which leads to less decomposition of organic material in the water column. Approximately 5.8% of the organic carbon produced on the surface in the eastern Bransfield Strait is exported down to 1000 m; this percentage exceeds the maximum EF/sub 1000/ values observed in the Atlantic and Southern Oceans. The eastern Bransfield Strait appears to be the most important site of organic carbon export to the deep sea in the Southern Ocean.

• Applied Biological Chemistry
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• 제17권1호
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• pp.42-48
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• 1974

고추 건조방법(乾燥方法)의 개선(改善) 및 건조특성(乾燥特性)을 알기 위하여 원형(原形) 및 절단(切斷)고추에 대(對)하여 온도(溫度)및 풍속(風速)의 영향을 조사(調査)하고 고추 건조기작(乾燥機作)을 고찰(考察)하였다. 1) 원형(原形)고추 건조곡선(乾燥曲線)의 특징(特徵)은 건조초기(乾燥初期)에는 어느정도(程度)의 settling down period를 가졌고 그이 후 제일(第一), 이기(二期) 감율건조기(減率乾燥期)를 보였으나 저온건조(低溫乾燥)일수록 항속건조양상(恒速乾燥樣相)을 띠어 임계수분함량(臨界水分含量)에 이르는, 시간(時間)이 최저온도(最低溫度)인 $55^{\circ}C$에서 15시간(時間)이나 되었다. 2) 절단(切斷)고추의 건조곡선(乾燥曲線)에서는 건조속도(乾燥速度)의 변화(蠻化)가 급격(急激)하였다. 3) 절단(切斷)고추의 건조방법(乾燥方法)은 원형건조(原形乾燥)에 비해 보다 효과적(效果的)이어서 각(各) 건조온도(乾燥溫度)에서 모두 약(約) 2배(倍) 이상(以上)의 건조시간(乾燥時間)을 단축(短縮)할 수 있었다. 4) 원형(原形) 및 절단건조(努斷乾燥) 모두 건조속도상수(乾燥速度常數)(k)값은 일정(一定)하지않고 시간(時間)에따라 변화(變化)하였으나 양건조방법(兩乾燥方法)에서 k값의 시간(時間)에 대(對)한 변화양상(變化樣相)이 구별(區別)되었다. 5) 건조속도상수(乾燥速度常數) k 값을 일정(一定)한 평균치(平均値)로 택(擇)할 경우, 원형건조(原形乾燥)에 대(對)하여는 $M-M_e/M_o-M_e=e^{-0.118t}$식(式는)이 절단건조(切斷乾燥)에 대(對)하여는 $M-M_e/M_o-M_e=e(-0.342t^{0.128})$식(式)이 적용되었다.

• 한국지역지리학회지
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• 제12권1호
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• pp.31-43
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• 2006

이 연구는 춘천마임축제를 사례로 지역축제의 지방화과정을 고찰하였다. 춘천마임축제의 역사와 지방화 과정은 1기 축제발생기($1989{\sim}1993$), 제2기 축제성장기($1994{\sim}1997$), 제3기 축제정착 및 확산기($1998{\sim}2004$)로 요약될 수 있다. 이와 같은 지방화 과정을 통해 춘천마임축제는 경제적 측면뿐만 아니라 사회 문화적 면에서도 많은 기여를 하면서 지역축제의 선순환 구조를 정착시켰다. 춘천마임축제의 성공적인 지방화 과정은 '축제의 비전제시자 정부-참여자'간 성공적인 결합과, 문화적 요소의 새로운 공간창출능력(문화의 공간생산능력)과 새로운 공간에서 기존 문화를 흡수 재창출하는 지역의 문화혁신역량(공간점유자들의 의한 문화생산역량) 간 상호작용의 결과이다.