돈분과 파쇄 왕겨 혼합물의 퇴비화

이찬규,장기운,유영석,Lee, Chan Kyu,Chang, Ki-Woon,Yu, Young-Seok 유기성자원학회 2003 유기물자원화 Vol.11 No.1

왕겨 활용의 일환으로 파쇄과정을 거쳐 돈분과 혼합하여 퇴비화에 미치는 영향 및 물질의 특성 변화를 조사하였다. 왕겨 입자는 1mm 이하, 1~2mm, 2mm 이상 등 3가지로 분리하여 돈분과 부피비(4 : 3)로 혼합한 후 정체식 퇴비화 시설에 적하하여 $250m^3/hr.$의 송풍기로 10min./day씩 강제송풍을 시켰다. 처리구는 톱밥구(Control), 왕겨구(RH), 1~2mm 왕겨구(MRH), 1mm이하 왕겨구(SRH) 등 4개였으며, 수분함량은 혼합물질의 특성에 따라 차이를 보였다. 온도변화는 퇴비화 시작 3일째부터 온도 상승이 시작되었으며, RH구에서 가장 빨리 $60^{\circ}C$로 상승하였다. 그 후 가장 먼저 온도가 하강하였으며 40일째 온도가 대기온도와 같았다. pH는 모든 처리구에서 10일 이내에서 감소하였지만 그 후 지속적으로 증가하는 경향을 보였다. 유기물은 퇴비화 초기와 후기에 큰 차이를 보이지 않았지만 RH구의 감소율이 다른 처리구에 비해 높았다. 공극률이 높은처리구일수록 암모니아 휘산이 적어 T-N함량이 높았고 C/N율은 20~40사이로 적당하였다. 퇴비화 과정 중 온도 변화는 용적밀도의 차이에 의한 것이며, 화학성분의 함량 차이는 두 물질사이의 혼합량 차이에 의한 것이었다.

원료 및 온도 조건에 따른 바이오차의 특성

이찬규 ( Chan-gyu Lee ),이지은 ( Ji-eun Lee ),이준규 ( Jun-gyu Lee ),김혁수 ( Hyuck-soo Kim ) 한국환경농학회 2023 한국환경농학회 학술대회집 Vol.2023 No.0

바이오차는 산소가 제한된 조건에서 바이오매스를 열분해하여 생성되는 물질로, 2018년 IPCC(Intergovernmental Panel on Climate Change)에서 발표한 특별보고서에서 바이오차를 이산화탄소 격리 기술로 언급한 이후 전 세계적으로 바이오차 관련 다양한 정책이 소개되고 있다. 현재 우리나라는 자발적 온실가스 감축사업에 바이오차 활용 내용이 포함되어 있으며, 이 때 바이오차는 나무, 초본, 왕겨 등 식물계 원료를 350℃ 이상 열분해(또는 가스화)하여 H/C 비율이 0.7 미만이여야 한다. 하지만 바이오차는 원료와 온도조건에 따라 그 특성이 매우 달라지기 때문에 본 연구에서는 다양한 원료를 대상으로 다양한 온도 조건에서 바이오차를 제조한 후 각 바이오차의 O/C_total 및 H/C_total 비율을 조사하였다. 바이오차 원료는 농ㆍ산업현장에서 발생하는 12종의 바이오매스를 확보하여 농업부산물, 동물부산물, 산업부산물로 구분하였으며, 자체 보유한 바이오차 제조 기기를 통해 300-700℃ 범위 내에서 100℃ 단위로 열분해 공정 하에 바이오차를 제조하였다. 각 조건별로 제조한 바이오차의 O/C_total 및 H/C_total 비율은 각각 0.09-2.83, 0.16-1.32 범위를 나타냈다. O/C_total의 경우 우리나라 기준은 없지만 EBC (European Biochar Certification)의 기준 <0.4과 비교 시 제조 온도보다는 원료의 특성이 결과에 영향을 미쳤으며, H/C_total은 열분해 온도가 증가할수록 감소하는 추세를 나타내 12종의 바이오매스 모두 500℃ 이상일 때 0.7 이하로 나타났다.

공기 가열식 초저온 기화기의 형상적 변수들에 따른 열전달 특성

이상철(Sang Chul Lee),이용훈(Yong Hun Lee),정한식(Han Shik Chung),정효민(Hyo Min Jeong),이찬규(Chan Kyu Lee),이병호(Byong Ho Lee) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6

This paper is numerical analysis on the heat transfer characteristics according to geometric parameters of cryogenic vaporizer using air heat source. At present time, LNG demand of Korea is increasing and piping line for NG transportation was almost worked in Korea. But, the vaporizer using air heat source is required because piping work in a part local town is difficult or impossible. Accordingly, this paper was numerically investigated on the heat transfer characteristics respect with geometric parameters of cryogenic vaporizer which is heated by air heat source apart from sea. this vaporizer have to be considered on relation between efficiency and economic aspects because air have a little heat source. Therefore, determination on geometries of vaporizer is important for vaporizer optimum design. In my study, basic geometry is one of using model as combination of pipe and longitudinal fin. Main parameters of geometry are number, thickness and length of fins. Finally, the results were only investigated on heat transfer effects and characteristics of each parameters variation.

언어 인지적 관점에서 본 이미지 통합(image packaging) 현상에 관한 연구

이찬규(Lee Chan-kyu) 중앙어문학회 2002 語文論集 Vol.30 No.-

This study investigate and analyse on reality of image related with language. Especially, this study center on how the image influence on the human communication. The results are following ; 1) The meaning of language compose of conceptual meaning and image related meaning - mainly connotative, emotional meaning. 2) The memory of image is natural process of cognitive activity of brain. So, the image closely related with language. 3) Images are connected with all components of meaning in language. 4) The image different from image schemas which refers to in former studies, and it exist with state of fuzzy. 5) Images are revealed in exaggeration on acquisition of language, shift of application and polysemy, meaning match and naming, feeling about values of meaning, association of meaning. changes of meaning. 6) The image on the human communication heavily influence on communicators. Because it react firstly and immediately as soon as to be stimulus by others. 7) People cognitively have property that put together images into one or minimum on the communication. 8) Needs and desires are motivations to put together images into one or minimum subjectively on the communication. 9) Images that made in the past influence on speaking and understanding on communications of the present.

확률 모델예측제어 알고리즘을 이용한 작동기 수가 부족한 무인잠수정 운동 제어

이찬규(Chan-gyu Lee),장준우(Jun-woo Jang),김진환(Jin-whan Kim) 제어로봇시스템학회 2020 제어·로봇·시스템학회 논문지 Vol.26 No.5

Most dynamic system operate under uncertainties such as external disturbances, measurement noise and modeling uncertainties. Failure to account for these uncertainties in the controller design may lead to performance degradation in real-world applications. As a result, SMPC (Stochastic Model Predictive Control), which provides a probabilistic framework for the nonlinear model predictive control of systems with stochastic uncertainty, has attracted much attention. The main challenge of SMPC is the efficient propagation of probabilistic uncertainty through system dynamics. In this paper, unscented transformation was used to efficiently estimate the distribution of states under uncertainties, and it is applied to trajectory tracking and obstacle avoidance of an unmanned underwater vehicle. The performance of the proposed algorithm was demonstrated through numerical simulations.

한강의 작품 속에 나타난 에코페미니즘 연구 -『채식주의자』를 중심으로-

이찬규 ( Chan Kyu Lee ),이은지 ( Eun Ji Lee ) 성균관대학교 인문과학연구소 2010 人文科學 Vol.0 No.46

[차량운동성능] 차동기어 모델 및 차량 동역학 특성에 미치는 영향

이찬규(Changyu Lee),이세진(Sejin Lee),이경수(Kyongsu Yi) 한국자동차공학회 1999 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1999 No.11_2

This paper presents a differential gear model and its influence on vehicle dynamics. Two models for differential gear has been presented: simple model and complete model. Two models provide similar response in cornering simulation. It has been shown that the differential gear has significant effect on cornering behavior of a vehicle.

의사 소통에 영향을 미치는 인지 작용에 관한 연구

이찬규(Chan Kyu Lee) 한국어의미학회 1999 한국어 의미학 Vol.4 No.-

The thesis studies how physical communication factors and cognitive ability of human beings influence each other especially focusing in what roles human genetic needs and brain`s intuition plat in cognitive process. First of all, this thesis reviews the cognitive function, part of brain activities. In this regard, genetic needs related with hypothalamus are categorized. The genetic needs do not work individually but correlate with each other. The needs related with communication are represented with safety needs and benefit needs. The thesis goes further into the influence of each variable factor on these needs. There can be many variables factors comprising communication process but the variable factors capable of influencing the cognitive activities are identified in this thesis. The influences of these variable factors on the cognitive activities of communication participants are also analyzed. The variable factors are divided into six areas: communication purposes and motives, communication participants, communication contents, communication ways, communication situations and linguistic characteristics. How these areas reciprocate with genetic needs, intuition system, emotions, memory and reasoning system are studied in the thesis. In Chapter 4 of this thesis, physical and cognitive models are established based on the above-mentioned relations. The physical model is illustrated in a figure showing the correlation of physically conceivable factors such as motives and purposes, means and ways, preparations and situations of communication while the cognitive model explains the correlation of cognitive activities in the brain. This thesis studies communication factors considering the results of brain research that have been done so far. Changes of brain activities of communication participants need to be measured in real time to prove this thesis but it is not possible to measure this in real time at the moment. However this thesis can be meaningful to become a basis that analysis on communication should not be made only from the perspective of communication contents. Further linguistic studies need to be made to prove how these cognitive activities function in real communication process. In addition to that, it is hoped that biological studies and research be made in order to get concrete proof of the cognitive field.

[I.T.S.부문] HiLS를 이용한 차간거리제어 시스템 오작동 검출의 실차 적용에 관한 연구

이찬규(Chankyu Lee),안장모(Jangmo Ahn),이경수(Kyongsu Yi) 한국자동차공학회 2001 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2001 No.11_1

Studies have shown that over 90% of highway accidents occur due to driver-related errors. This point of view, a Vehicle-to- Vehicle Distance Control System aims to increase convenience and safety. But, the system requires many sensors and throttle/brake actuators, therefore they have some possibility to fault. The aim of this research is to develop fault detection algorithm, verify the algorithm using HiLS and apply to a test vehicle. The fault detection and identification are constructed using fault detection filter and residue method.

거제대학 메카트로닉스계열 자동차과 소개

이찬규(Chan-Kyu Lee) 한국자동차공학회 2004 오토저널 Vol.26 No.1