Optimal Parenthesization 동적 프로그래밍의 고속처리를 위한 시스토릭 어레이의 설계

우종호,신동석,성기택 釜山水産大學校 1990 釜山水産大學 硏究報告 Vol.30 No.1-2

An 1-dimensional systolic array for optimal parenthesization dynamic programming processing is designed. To get an 1-dimensional systolic array, 2-dimensional systolic array was projected and the time scheduling was done using the block pipeline time of 2-dimensional array. The designed 1-dimensional systolic array has n processing elements. [(n+1)/2](n-1)+3n-1 processing time, only the unidirectional paths, and constant�/O channels independent upon the problem size(n is the problem size). The ratio of its processor utilization to that of 2-dimensional array is (2n�+n-1)(n�+5n-4).

조합논리회로에 있어서 복수결함에 대한 Random Testing의 확률적 해석

禹鍾鎬 釜山水産大學校 1983 釜山水産大學 硏究報告 Vol.23 No.2

조합논리회로에 있어서 random testing을 해석하였다. 단일 결함을 일반화시켜 복수결함에 대해서 논했다. 해석과정은 다음과 같다. 첫째, 복수결함에 대해서 등가의 축소된 복수결함을 구한다. 둘째, Boolean difference를 이용하여 이 결함에 대한 test pattern을 구한다. 셋째, 입출력신호확률에 관한 이론을 이 test pattern에 적용한다. 이 방법의 장점은 회로구성에 대한 제한없이 test pattern에 따른 random testing을 해석할 수 있다는 것이다. 또한 컴퓨터시뮬레이션을 통해서 이론의 타당성을 확인했다. A probabilistic analysis of random testing for combinational circuits has been studied. The test pattern to the multiple fault can be obtained by the Boolean difference concepts. If the primary input probability is applied to this test pattern, we can obtain the probability of the multiple fault detection. The theory was verified by the computer simulation.

유구치 기성 금관의 변연 적합도에 관한 연구

우주형,장철호,김정욱,장기택,김종철 대한소아치과학회 2007 大韓小兒齒科學會誌 Vol.34 No.1

본 연구의 목적은 발거된 기성 금관 수복 유구치를 대상으로 변연 적합도를 관찰 분석하는 것이다. 서울대학교 치과 병원 소아치과에서 수거한 3M사의 기성 금관 수복 유구치를 대상으로 하였다 상악 제 1유구치 42개, 상악 제 2유구치 25개, 하악 제 1유구치 37개, 하악 제 2유구치 28개를 대상으로 기성 금관의 변연에 따라 치근 절단한 후 단면을 Fine Pix S602 디지털 카메라로 촬영한 후 Kappa image base program을 이용해 두각 부위 및 임의로 20 부분의 변연 간격과 전체 기성 금관 면적 중 변연 간격의 면적이 이루는 비율을 측정하여 다음과 같은 결과를 얻었다. 1. 평균 변연 간격은 상악 제 2유구치, 하악 제 1유구치, 하악 제 2유구치, 상악 제1 유구치 순으로 높았다 (P<0.05). 2. 평균 변연 간격 면적의 비율은 치아의 종류에 관계없이 약 20%를 상회하는 값을 보였다. 3. 상악 제 1,2유구치에서는 근심면의 변연 간격이 가장 컸고, 하악 제 1유구치에서는 원심 설면, 하악 제 2유구치에서는 협면에서 변연 간격이 가장 큰 값을 보였다. Stainless steel crowns are invaluable restorative material for the treatment of badly broken down primary teeth in pediatric dentistry. But it is difficult to fit margin because selection of size is not easy and they are not adjusted for Korean children. The purpose of this study was to examine and analyze the marginal adaptation of stainless steel crown of posterior primary tooth. Marginal surface was taken by Fine Pix S602 digital camera and measurements of crown were recorded at 20 points that were randomly selected for marginal gap evaluation by Kappa image base program. 1. Mean marginal gap were large upper 2nd primary molar, lower 1st primary molar, lower 2nd primary molar, upper 1st primary molar in order(p<0.05). 2. Mean marginal surface dimension ratio was more than 20% irrespective of tooth. 3. Largest amount of marginal gap was shown at mesial surface in upper 1st, 2nd primary molar and distolingual surface in lower 1st primary molar, buccal surface in lower 2nd primary molar.

심장수술 시 농축적혈구, 자가수혈기 혈액, 체외 순환기 혈액에서의 유리 혈색소 농도 비교

송장호,구승우,백종화,정용보,이정순,최인철 대한마취과학회 2002 Korean Journal of Anesthesiology Vol.43 No.5

Background: Intraoperative autotransfusion or residual blood in a cardiopulmonaty bypass (CPB) circuit has been used to reduce the need for an homologous blood transfutsion during cardiac surgery. However, it may contain some free hemoglobin released from damaged cells. The load of blood containing free hemoglobin may cause renal dysfunction. We measured the amount of free hemoglobin in backed blood, cell saver blood and CPB blood to evaluate what is the least hemolytic blood transfused in cardiac surgery. Methods: This study was performed in 20 patients undergoing cardiac surgery. In each patient, the banked blood, intraoperative salvaged blood with a cell saver and CPB residual blood were sampled at the end of the operation. The concentration of free hemoglobin, hemoglobin and platelet counts were measured in these blood samples and percent of hemolysis was calculated (%hemolysis = [free hemoglobin] / .free hemogloben + hemoglobin]) Results: In salvaged blood with a cell saver, CPB residual blood and banked blood, hemoglobin concentrations were 20.1 ± 2.7 g/dl, 8.0 ± 1.1 g/dl, and 22.2 ± 2.7 g/dl, respectively. Free hemoglobin concentrations were 336.6 ± 239.5 mg/dl, 49.2 ± 26.8 mg/dl, and 279.5 ± 167.5 mg/dl respectively. Platelet counts were 26.1 ± 22.2 × 10^3/mm^3, 116.8 ± 56.5 × 10^3/mm^3, and 94.9 ± 43.6 × 10^3/mm^3 respectively. % Hemolysis were 1.6 ± 1.1%, 0.6 ± 0.4%, and 1.2 ± 0.7% respectively. In the comparison between the salvaged blood with a cell saver and CPB residual blood, free hemoglobin concentration, % hemolysis, and platelet counts had positive correlations (r = 0.8, 0.7, and 0.6). Conclusions: In twenty cardiac surgeries, CPB residual blood had a lower free hemoglobin level than the other two blood groups. The platelet counts in CPB residual blood were higher than those in cell saver blood but did not differ from those in banked blood. Therefore, CPB residual blood was the least hemolytic blood among the three blood groups when a transfusion was performed in cardiac surgery. (Korean J Acesthesiol 2002; 43: 588~593)

소아 재발성 호흡기 감염증에서 Broncho-Vaxom�의 임상효과

배종우,차성호,조병수,정사준,최용묵,안창일 한국의학사 1990 診斷과治療 Vol.10 No.9

순간식 가스급탕기의 효율 계산법에 관한 연구

최창호,이현우,김종민 대한건축학회 2003 대한건축학회논문집 Vol.19 No.1

At this present, energy consumption has been increased continuously except IMF period. Especially, growth ratio of gas consumption for heating or hot water supply is very high. Therefore, to reduce the gas consumption, it is necessary for us to use energy for hot water supply economically or reduce the amount of gas consumption. But with the trend of hygienic life culture, gas consumption for hot water supply doesn't decrease entirely. For these reasons, the authors carried out an experimental study on simplified prediction method for output water temperature of gas fired instantaneous boiler. This study suggests direction for high efficiency and method for efficiency improvement of hot water supply system by simple prediction method for output water temperature of instantaneous gas hot water boiler.

기관지천식 환아에서 Ketotifen(Zaditen^(�))의 임상적 효과에 관한 연구

배종우,차성호,조병수,정사준,최용묵,안창일 한국의학사 1988 診斷과治療 Vol.8 No.4

미생물 실험실 안전에 관한 조사 연구 : Ⅲ. 실험실 생물재해 관리 Ⅲ. Control of Biohazard in the Laboratory

이호왕,김주성,정윤섭,정희영,장우현 대한감염학회 1990 감염 Vol.22 No.1

The response to an emergency resulting from an accident involving micro-organisms, whether in laboratory or during transit, needs to be graded according to the degree of hazard to human created by the circumstances of the accident and the properties of the organisms concerned. Kim and Lee(1988) reported 102 laboratory acquired infections among 2,417 laboratory workers during 1981-1985 in Korea. It is estimated 8.28 infections annually per 1,000 laboratory workers. A catagorization of micro-organisms by risk group is proposed for the purpose of accident management, and classification of etiological agents on the basis of hazard in Korea has published by Kim and Lee et al (1988) as a general reference for some laboratory activities utilizing infectious agents. This publication will provide specific descriptions of combinations of microbiological practices, safety equipments, and laboratory facilities and recommendations for use in four categories or biosafety levels of laboratory operations with selected infectious agents of man. Recommendations for biosafety levels for specific agents are made on the basis of the potential hazard of the agent and of the laboratory function or activity.

고속 공중 무선랜 시스템을 위한 효율적인 연결 수락 제어방법의 연구

이현우,윤홍,윤종호 한국항행학회 2003 韓國航行學會論文誌 Vol.7 No.2

본 논문에서는 무선랜 기술을 활용한 초고속 무선인터넷 서비스에서 사용자 단말의 최대 성능을 얻기 위해 효과적으로 AP를 선택하고 연결을 설정하는 방식에 관한 것이다. IEEE 802.11에 기반한 공중 무선랜 환경에서 AP의 탐색과정을 수동형과 능동형으로 분류하고, 본 논문에서는 수동형 AP탐색 과정은 무선랜 접속장치(AP:Access Points) MAC 계층에서 단말에 미디어 접근 정보를 방송으로 알려주는 비콘(Beacon) 프레임을 이용하고, 능동형 AP의 조사응답 (Probe Response)메시지 프레임을 이용하여 무선랜 단말에게 현제 AP에 연결(ASSOCIATION)되어 있는 단말 개수와 처리중인 프랙픽량을 알려주는 방식을 제안한다. 단말에서는 RSSI, AP에 연결된 단말의 개수와 처리하는 트래픽량의 정보를 종합적으로 검토하여 효율면에서 가장 유리한 AP를 선택하여 연결을 설정하면 다수의 사용자가 동시에 사용하는 핫스팟 환경에서도 최대성능을 얻을 수 있으며, 사업자입장에서는 사용자의 분산으로 자원과 망관리 효율면에서 상당한 효과가 있다. This paper generally relates to the field of wireless local area networks(WLANs), and more particularly, to AP selection and association methods for the performance of a station. In these days, IEEE 802.11 Wireless LAN network is widely deployed and used as an emerging service to connect high-speed Internet in the public wireless environment. But, if there are many users in hot spot area, they suffer a severe decrease of performance. Thus it needs an association an access control mechanism especially when it is used in the public environment. In this paper, we suggest a selection and association method using Beacon or Probe Response frames based IEEE 802.11. Station selects AP using the information of the capacity area in a Beacon or a Probe Response frame. According to the present paper, an association method for a public WLAN service, which includes a WLAN user terminal and an AP for relaying WLAN communications to and from the user terminal, includes the steps of the user terminal asking the AP's states for access to a radio channel; and the station selects and associates with the AP. According to the above-described selection in a high speed wireless Internet service based on public WLAN technologies that are currently in operations. Further, it is possible to improve the efficiency of network management.

精神分裂症患者의 幻覺에 對한 精神病理學的 考察 : Hun Adaptation of Bender-Gestalt Test 및 Mini-Mental Test를 중심으로

오상우,이귀행,박종호 大韓神經精神醫學會 1992 신경정신의학 Vol.31 No.2

To evaluate the state of perceptual distortion experienced by Schizophrenic hallucinations the Hutt Adaptation of the Bender-Gestalt test(HABGT) and Mini-mental test were performed on two subgroups of schizophrenics. 28 hallucinated schizophrenics(hallucinated group) and 28 nonhallucinated schizoprirenicsCcontrolled group). Psychopathology scale. Adience-abience scale. Regression level were applied to the results of HABGT of both groups. The results of Mini-mental test suggested that hallucinated group had less organic brain damage than controlled group. The results of HABGT suggested that hallucinated group had better ability in external object perception, reasonable ego function, adaptation and emotional control than controlled group. The clinical and psychopathological meanings of these findings were discussed.