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이대식,한상도,명광식,이상호,손영목,이종도 ( D . S . Lee,S . D . Han,k . S . Myung,S . H . Lee,Y . M . Son,J . D . Lee ) 한국센서학회 1995 센서학회지 Vol.4 No.4
Catalytic combustion type gas sensor was fabricated by using γ-Al₂O₃, Pd catalyst and some binders for metane and propane detection. Using the gas sensor, digital gas meter was manufactured and tested for sensing performance. The fabricated sensor had power consumption of 700mW with applied voltage of do 2V and the output voltage of the sensor was about 700mV for propane of 1,000ppm and 500mV for methane of 1,000ppm. In 10 cycle injection of the gases of 2,400ppm. The digital meter showed good sensitivity, linearity. and reproductivity with precision of ±25ppm(±1%)
감축 불가능한 유향그래프로부터 지배자 트리를 구성하기 위한 효과적인 알고리즘
이대식,심손권,안희학,Lee, Dae-Sik,Sim, Son-Kweon,Ahn, Heui-Hak 한국정보처리학회 2000 정보처리논문지 Vol.7 No.8
지배자 트리란 유향그래프에서 지배관계를 트리로 표현한 것이다. 임의의 유향그래프로부터 지배자 트리를 구성하기 위한 효과적인 알고리즘을 제시한다. 감축 가능한 흐름그래프는 지배자 계산을 한 후 지배자 트리로 감축된다. 감축 불가능한 흐름그래프는 정보 테이블의 연결가지 정보를 이용하여 지배자 연결그래프로 구성된다. 지배자 연결그래프에서 지배자 트리로 감축하기 위하여 효과적인 순차감축 알고리즘과 지연감축 알고리즘을 제안한다. The dominator tree presents the dominance frontier from directed graph to the tree. we present the effective algorithm for constructing the dominator tree from arbitrarY directed graph. The reducible flow graph was reduced to dominator tree after dominator calculation. And the irreducible flow graph was constructed to dominator-join graph using join-edge information of information table. For reducing the dominator tree from dominator-join graph, we present the effective sequency reducible algorithm and delay reducible algorithm.
이대식,안창근,김봉규,표현봉,김진태,허철,김승환,Lee, D.S.,Ahn, C.G.,Kim, B.K.,Pyo, H.B.,Kim, J.T.,Huh, C.,Kim, S.H. 한국전자통신연구원 2019 전자통신동향분석 Vol.34 No.4
With advances in olfactory sensor technologies, the number of reports on various intelligent applications using multiple sensors (sensor arrays) are continuously increasing for fields such as medicine, environment, security, etc. For intelligent and point-of-care applications, it is not only important for the sensor technology to perform chemical or physical measurements rapidly and accurately, but it is also important for artificial intelligence technology to recognize and quantify specific chemicals or diagnose diseases such as lung cancer and diabetes. In particular, great advances in pattern recognition technologies, including deep learning algorithms, as well as sensor array technologies, are expected to enhance the potential of various types of olfactory intelligence applications, including early cancer diagnosis, drug seeking, military operations, and air pollution monitoring.
이대식,Lee, Dae-Sik 한국과학기술단체총연합회 2002 과학과 기술 Vol.35 No.4
[Bio Technology의 세계] 신약개발 연구기관 설립 등 투자확대를
모바일 인스턴스 메신저를 이용한 양방향 검색 알고리즘의 설계 및 구현
이대식,장청룡,이용권,Lee, Daesik,Jang, Chungryong,Lee, Yongkwon 디지털산업정보학회 2015 디지털산업정보학회논문지 Vol.11 No.2
In this paper, we design and implement a two-way search algorithm that can provide a customized service through the user with real-time two-way communication using a mobile instant messaging service. Therefore, we design and implement the automative search system which enables delivering message to each user mobile terminal from a plurality of relay mobile terminals by utilizing the mobile instant messenger, not to deliver a message from the main server to the mobile instant messenger user directly. Two-way search system using the mobile instant messenger can be immediately collect the user's response is easy to identify the orientation of each user, and thus can be provided to establish a differentiated service plan. Also, It provides a number of services(text, photos, videos, etc) in real-time information to the user by utilizing the mobile instant messenger service without the need to install a separate application. Experiment results, data processing speed of the category processing way to search for the data of the DB server from a user mobile terminal is about 7.06sec, data processing number per minute is about 13 times. The data processing speed of the instruction processing way is about 3.10sec, data processing number per minute is about 10 times. The data processing speed of the natural language processing way is about 5.13sec, per data processing number per minute is about 7 times. Therefore in category processing way, command processing way and natural language processing way, instruction processing way is the most excellent in aspect of data processing speed, otherwise in aspect of per data processing number per minute, the category processing way is the best method.
TiO2 귀금속을 첨가한 WO3 후막 센서의 제조 및 NOx 감응 특성
이대식,한상도,손영목,이덕동 ( Dae Sik Lee,Sang Do Han,Young Mok Son,Duk Dong Lee ) 한국센서학회 1997 센서학회지 Vol.6 No.4
NO_x sensors using tungsten oxide films as a base material were prepared and their electrical and sensing characteristics have been investigated. The WO₃ thick films doped with SnO₂ or TiO₂ showed higher sensitivity and better sorption characteristics to NOx gas than the pure WO₃ films material in air at operating temperature of 400 ℃. By addition of noble catalysts, such as Ru or Au, to the TiO₂-WO₃ thick films, their sensitivity, recovery and selectivity to NO_x gas were found to be more enhanced.
고혈압(高血壓) 및 고지혈증(高脂血症)에 대(對)한 청열도담탕(淸熱導痰湯)의 실험적(實驗的) 연구(硏究)
이대식,신길조,조기호,김영석,배형섭,이경섭,Lee, Dai-Sik,Shin, Gil-Cho,Cho, Ki-Ho,Kim, Young-Suk,Bai, Hyung-Sup,Lee, Kyung-Sup 대한한방내과학회 1991 大韓韓方內科學會誌 Vol.12 No.2
Mahwangsan is used in the treatment of asthma due to wind and cold(風寒喘). This is study was carried out to investigate the effect of Mahwangsan extract and In order to investigate the effects of Chungyeuldodamtang experimental studies were performed in hyperlipidemia Rats induced by cholesterol and Spontaneusly hypertension rats. The contents of serum total cholesterol, triglyceride, phospholipid and FFA and the changes of blood pressure and heart beat were measured. The results were summarized as follows ; 1. The content of Total-Cholesterol in the serum compared with control group tended to be decreased in Chungyeuldodamtang group, but did not show a significance. 2. The content of Triglyceride in the serum was significantly decreased in Chungyeuldodamtang group. 3. The content of Phospholipid in the serum was significantly decreased in Chungyeuldodamtang group. 4. The content of FFA in the serum tended to decreased in Chungyeuldodamtang group, but did not show a significance. 5. The S.H.R's blood pressure was significantly decreased in Chungyeuldodamtang group. 6. The S.H.R.'s Heart beat compared with control group tended to be decreased in Chungyeuldodamtang group, but did not show a significance. According to the above results, it is assumed that Chungyeuldodamtang has a valid effect on Hypertension and Hyperlipidemia.
SnO2 과 Pt 를 첨가한 WO3 후막센서의 제조 및 NOx 감응 특성
이대식,한상도,박기배,심규성,이덕동,손영목 ( D . S . Lee,S . D . Han,K . B . Park,K . S . Sim,D . D . Lee,Y . M . Son ) 한국센서학회 1996 센서학회지 Vol.5 No.5
highly sensitive WO₃ doped with SnO₂ and Pt thick-film sensors for NOx gas were fabricated. The sensors had a maximum sensitivity at operating temperature of 250℃, but the optimum operation temperature, considering recovery desorption time, was at 330℃. These sensors improved sensitivity, response and recovery time, selectivity and stability, as compared to WO₃ sensors. The good linearity of sensitivity as a function of the gas concentration exhibited the possibility to be used for concentration meter.
변화된 스레드 트리를 이용한 점진적 LR 파싱 알고리즘 구현 및 설계
이대식,Lee, Dae-Sik 한국융합보안학회 2005 융합보안 논문지 Vol.5 No.4
스레드 트리란 LR 파싱표를 사용하여 파스 트리인 동시에 파스 스택을 표현 할 수 있는 자료구조이다. $Larchev\^{e}que$는 스택을 사용하여 스레드 트리들 구성하고 점진적 파싱을 한다. 본 논문에서는 재 파싱 노드와 파싱속도를 줄이기 위해 스택을 사용하지 않는 변화된 스레드 트리를 구성하는 알고리즘을 제안한다. 또한 노드의 재 파싱 과정을 없애기 위해 변화된 스레드 트리와 LR 파싱표를 사용하는 점진적 파싱 알고리즘을 제안한다. Threaded Tree is the data structure that can express parse stack as well as parse tree with LR parsing table. $Larchev\^{e}que$ makes Threaded Tree and Incremental Parsing with stack. This paper suggests the algorithm consisting of changed threaded tree without stack in order to reduce reparsing node and parsing speed. Also, it suggests incremental parsing algorithm to get rid of the reparsing process in node.