실내측위를 위한 새로운 클락 동기 방안

이영규,양성훈,이승우,이창복,김영범,최성수,Lee, Young-Kyu,Yang, Sung-Hoon,Lee, Seong-Woo,Lee, Chang-Bok,Kim, Young-Beom,Choe, Seong-Su 한국통신학회 2007 韓國通信學會論文誌 Vol.32 No.3A

클락 동기는 실내 측위를 위한 실내 동기망을 구축하는데 있어서 가장 기본적으로 고려해야할 요소 중 하나이다. 본 논문에서는 하드웨어의 복잡성 및 동기에 필요한 데이터 오버헤드를 줄이기 위해 타임스탬프를 사용하지 않고 클락을 동기 시키기 위한 새로운 알고리즘에 대해서 논한다. 또한 동기 성능에 큰 영향을 미치는 주파수 드리프트를 보상해 주기 위한 알고리즘에 대해서도 기술한다. 제안한 동기 알고리즘을 사용한 동기 성능에 대한 평가는 모의실험을 통한 MTIE(Maximum Time Interval Error) 값을 고찰함으로써 이루어졌다. 모의실험에 있어서 실제적인 오실레이터에 대한 주파수 드리프트 값을 사용하였다. 모의실험 결과 1 초의 동기 간격에 1 ns 분해능을 갖고 주 클락과 종속 클락에 TCXO를 사용하면 10 ns 이하의 동기가 가능함을 고찰하였다. Clock Synchronization is one of the most basic factors to be considered when we implement an indoor synchronization network for indoor positioning. In this paper, we present a new synchronization algorithm which does not employ time stamps in order to reduce the hardware complexity and data overhead. In addition to that, we describe an algorithm that is designed to compensate the frequency drift giving an serious impact on the synchronization performance. The performance evaluation of the proposed algorithm is achieved by investigating MTIE (Maximum Time Interval Error) values through simulations. In the simulations, the frequency drift values of the practical oscillators are used. From the simulation results, it is investigated that we can achieve the synchronization performance under 10 ns when we use 1 second synchronization interval with 1 ns resolution and TCXOs (Tmperature Compensated Cristal Oscillators) both in the master clock and the slave clock.

국내의 지역별 우박 발생 빈도 분석

이영규,이재수,이승수,김학선,Lee. Young-Kyu,Lee. Jae-Soo,Lee. Sung-Su,Kim. Hak-Sun 한국방재학회 2007 한국방재학회 학술발표대회논문집 Vol.2007 No.1

Data for occurrence of hail over Korean Peninsula for the period 1961-2005 are obtained from the Korea Meteorological Administration (KMA). According to the average occurrences during each season in Korea Peninsular, hail days are almost distributed uniformly in the spring, fall and winter, except the summer and have averages of 5 days for each season. Analysis of regional occurrence of hail shows that inland of Korea Peninsular is vulnerable to hail in the spring and summer and the islands of Ullung, Baegryeong and Cheju and the coastal regions vulnerable in the fall and winter. It can be postulated that these seasonal patterns of hail is affected by the Monsoon effect.

하수관거 설계

이영규,Lee, Yeong-Gyu 한국상하수도협회 1986 水道 Vol.35 No.-

기구조작후 치근표면의 조도에 관한 연구; 3차원 측정기틀 이용한 in vitro 연구

이영규,Lee, Young-Kyoo 대한치주과학회 1998 Journal of Periodontal & Implant Science Vol.28 No.4

A primary goal of periodontal therapy is the creation of root surfaces that are free of plaque and calculus. It is not yet to be determined whether it is desirable to have a smooth root surface after treatment. It is also not clear what degree of roughness result from different instruments. In the present study various instruments for root surface debridement were evaluated. 20 extracted teeth were utilized, and the teeth were treated with one of the following instrument: Gracey curette, Perio Clean, and piezo ultrasonic device(Setlec, P Max) with general scaler tip, curette-like tip, and diamond tip. 3 dimensional planimetric device(Accura) was used to evaluate the average surface roughness. It was demonstrated hand and power-driven instruments did not have a significant difference in roughness of the root surface following instrumentation. And ultrasonic scaler tip tended to make a most smooth surface than other instruments. The possible reasons of the result were discussed.

Streptococcus mutans균주의 Bacteroides intermedius 성장 억제에 관한 연구

이영규,최상묵,정종평,Lee, Young-Kyoo,Choi, Sang-Mook,Chung, Chong-Pyoung 대한치주과학회 1990 Journal of Periodontal & Implant Science Vol.20 No.2

치은열구내 수복과 Dentogingival junction(DGJ);제 2 부:수복물형태와 DGJ

이영규,손성희,Lee, Young-Kyoo,Son, Seong-Heui 대한치주과학회 1999 Journal of Periodontal & Implant Science Vol.29 No.1

All contours of the restoration not directly related to occlusion are related to the gingival tissues only.And proper contour of restoration is essential for the health of the periodontal tissues.But there are so many controversies about the contour of the restoration, and there is no uniform agreement in the literature as to which contour of restoration is best for periodontium. In general, the contour of restoration means the supragingival contour only but in the case of the intracrevicular restorative procedure the subgingival contour of restoration must be considered. Because a portion of the restoration is placed in a gingival sulcus which is extremely vulnerable to periodontal disease. In this article the concepts or theories of the supragingival contour, the subgingival contour, and the emergence profile were discussed.The contour of the restoration and the biotype of the periodontium must be considered in intracrevicular restorative procedure.And sufficient tooth preparation is important factor to develop the proper contour of restoration which is kind to periodontium.

Actinobacillus actinomycetmcomitans SNUDC 10-1 및 Y4에 대한 국소유년성 치주염 환자 혈청항체역가에 관한 비교 연구

이영규,최상묵,정종평,Lee, Young-Kyoo,Choi, Sang-Mook,Chung, Chong-Pyong 대한치주과학회 1984 Journal of Periodontal & Implant Science Vol.14 No.1

기고 - 자연재해 언더라이팅을 지원하는 UCIS

이영규,Lee, Yeong-Gyu 한국화재보험협회 2014 防災와 保險 Vol.154 No.-

수재에 대한 특수건물 진단을 위한 위험도지수 개발

이영규,이철주,안승일,Lee. Youngkyu,Lee. Chuljoo,Ahn. Seungil 한국방재학회 2013 한국방재학회논문집 Vol.13 No.6

전국에 분포되어 있는 약 3만4천 특수건물의 수재 안전진단을 위하여 수재위험도지수를 개발하였다. 수재위험도지수는 최대가능피해액의 잠재적 피해 백분율로 정의되며 위험 삼각형 방법론에 기초하여 수재위험도지수를 산출하였다. 수재위험요인을 평가하기 위하여 하천범람, 폭풍해일에 의한 범람, 침수흔적을 포괄하는 홍수관리지도를 작성하였다. 723건 특수건물에 대해서 노출도와 취약도를 조사하였다. 취약도는 바닥침수심에 따른 평균피해율곡선과 침수방어높이, 바닥면높이, 골조, 외벽, 내장재 구성비, 수변전실의 위치, 배수펌프 유무를 고려하여 평가된다. 풍수재담보 요율등지에 따른 수재위험도지수는 뚜렷한 상관관계를 보이지 않았다. 시도별 수재위험도지수는 서울과 전북 지역이 높게 나타나 이 지역의 다수 특수건물이 홍수위보다 낮은 저지대에 위치하는 것으로 조사되었다. 침수심에 따른 수재위험도지수는 뚜렷한 상관관계가 보이지 않았다. 건물의 층수에 따른 수재위험도지수는 층수가 높아질수록 수재위험도지수 범위가 좁아지는 경향을 보였다. The flood risk index (FRI) is developed to inspect the safety against flooding for the specific buildings, approximately 34,000 buildings, distributed over South Korea. FRI, defined as percentage index of potential flood damage to the possible maximum damage, is evaluated by the risk triangle approach. The flood management map, that includes the flood zones of riverine inundation, storm surge and the flood footprints, is constructed in the study. The exposure and vulnerability for 723 specific buildings is investigated. The vulnerability is assessed by the mean damage ratio curve with respect to the floor water depth and the building property such as the defensive height against flood, first floor height, building structure, wall, interior cost ratio, position of electric transformer vault, and drainage pump. Comparing FRI with the risk zones for the wind and flood induced loss coverage doesn`t show a explicit correlation. Researching FRI with respect to Sido, Korean province, shows that many of the specific buildings located in Seoul and Jeonbuk is distributed lower than the flood level. Considering FRI with the inundation depth doesn`t show an intensive correlation. Comparing the building storey to FRI shows that the ranges of FRI is getting narrow as the storey increases.

辛荑淸肺飮의 抗allergy效果에 關한 實驗的 硏究

이영규,채병윤,Lee, Young-Gyu,Chae, Byung-Yoon 대한한방안이비인후피부과학회 2000 한방안이비인후피부과학회지 Vol.13 No.2

Sinichengpaeum has been widely used in the oriental medical treatment of nasal diseases. These studies were performed done to investigate the effect of Sinicheng- paeum on the anti-allergic action We studied the vascular permeability response induced by the histamine and serotonin injection(allergy Ⅰ type), homologous PCA provoked by the IgE-like antibody against EWA(allergy Ⅳ type), contact dermatitis induced by picryl chloride(allergy Ⅳ type), delayed type hypersensitivity response to SRBC (allergy Ⅳ type), and the amount of eosinophil and IgE. The results were as follows: 1. The effect of Sinichengpaeum on vascular permeability responses to intradermal histamine and serotonin were significant. 2. In the homologous PCA provoked by the IgE-like antibody against white egg albumin, Sinichengpaeum showed a significant effect. 3. In the delayed type hypersensitivity responses to picryl chloride, Sini-chengpaeum provoked a significant effect. 4. After reaction provoked by picryl chloride, Sinichengpaeum showed an insignficant effect on amount of eosinophil, but a significant effect in IgE amount. 5. In the delayed type hypersensitivity responses to SRBC, Sinichengpaeum provoked a significant effect. 6. After reaction provoked by SRBC, Sinichengpaeum showed a significant effect on amount of cosinophil, but an insignificant effect in IgE amount.