치주탐침과 초음파기구를 이용한 구개 점막 두께 측정치의 비교연구

김태우,이재관,엄흥식,장범석,Kim, Tae-Woo,Lee, Jae-Kwan,Um, Heung-Sik,Chang, Beom-Seok 대한치주과학회 2006 Journal of Periodontal & Implant Science Vol.36 No.4

Maxillary palatal mucosa is the most frequently used donor site of the soft tissue for periodontal plastic surgery. In our study, thickness of the palatal mucosa between the mesial side of the maxillary first premolars and the distal side of the maxillary first molars was measured with a periodontal probe and an ultrasonic device in 30 young Korean adults. Using the data, the possibility of the clinical application of ultrasonic devices was evaluated. The results of this study were as follow; 1. The thickness of the palatal mucosa of the maxillary premolars is the thickest and that of the mid-palatal portion of the maxillary first molar is the thinnest. 2. The thickness of the palatal mucosal tissue increases from the gingival margin to the mid-palatal suture. 3. The measurements of the periodontal probe and the ultrasonic device revealed the strong positive correlations.

신생 여아에서 처녀막의 해부학적 구조와 외성기에 발생하는 기형

김태우,이남혁,김상윤,Kim, Tae-Woo,Lee, Nam-Hyuk,Kim, Sang-Youn 대한소아외과학회 1997 소아외과 Vol.3 No.2

The anatomical variations of the external genitalia including the hymen were observed prospectively in 1,500 female infants born between March, 1992 and July, 1992 at the Taegu Fatima Hospital. Careful inspection of the external genitalia was done within 24 hours after birth, and abnormal findings photographed. Almost all hymenal tissue appeared to be redundant. The hymen was annulus in 89.1 % of patients. Ninteen point nine percent had a central orifice and the remainder a ventral orifice. External ridges, intravaginal ridges, and clefts were present in 71.5 %, 50.7 % and 40.5 %, respectively. Congenital anomalies of the external genitalia were found in 20 patients(1.4 %). There were sixteen cases of hymenal cysts, two hymenal polyps, one imperforate hymen, and one Skene's duct cyst. Seven of the 16 hymenal cysts with stalks were excised and those without stalk were aspirated. Hymenal polyps were excised. Imperforate hymen was incised and drained, and Skene's duct cyst was aspirated successfully. The surgical procedure were done without anesthesia, and the results have been good. In conclusion, routine physical examination of the female newborn infant detects frequent developmental anomalies. The significance of those anomalies will be clarified after longitudinal long-term followup studies.

사회 속의 의료, 의료 속의 사회 : 한국의 한의학과 중국의 중의학에 대한 의료인류학적 고찰

김태우,한창호,Kim, Tae-Woo,Han, Chang-Ho 대한한방내과학회 2012 大韓韓方內科學會誌 Vol.33 No.2

Objectives : One of the fundamental premises of medical anthropology is the interconnectedness of medicine and society. Recent ethnographies of medicine demonstrate that the interconnectedness of the social and the medical not just evokes relatedness of the two parties, but also emphasizes the agency of the constituents, mutually shaping and being shaped. Against this backdrop, this study attempts to anthropologically investigate Korean medicine in South Korea and traditional Chinese medicine (TCM) in China. Methods : The findings are based on anthropological studies of East Asian medicine employing long-term fieldwork about Korean Medicine and Traditional Chinese Medicine. Results : TCM is characterized by standardization, hospitalization, and scientization, by which simplification, collectivization, and biomedicalization prevail in contemporary traditional medicine in China. In contrast, Korean medicine is characterized by diversity, care delivery by individual private clinics, and a considerable distance from biomedicine. To understand the divergence of the two East Asian medicines, one should consider the social contexts intervening into the medical contents, such as the role of the state and dominant discourses in given historical periods. Conclusions : Korean medicine in South Korea and TCM in China demonstrate well the hybridity of the social and the medical, suggesting that, for more comprehensive understanding of the medical, the social should be paid attention to.

고정밀 고속 하이브리드 온 칩 온도센서

김태우,윤진국,우기찬,황선광,양병도,Kim, Tae-Woo,Yun, Jin-Guk,Woo, Ki-Chan,Hwang, Seon-Kwang,Yang, Byung-Do 한국정보통신학회 2016 한국정보통신학회논문지 Vol.20 No.9

본 논문에서는 고정밀 하이브리드 온 칩 온도센서를 제안하였다. 제안된 온도센서에서는 SAR 타입 온도센서와 ${\Sigma}{\Delta}$타입 온도센서를 혼합하였다. SAR 타입 온도센서는 ${\Sigma}{\Delta}$타입 온도센서 보다 온도를 찾아가는 속도가 빠르지만 오차가 발생할 확률이 높은 단점이 있고, ${\Sigma}{\Delta}$ 타입 온도센서는 SAR 타입 온도센서 보다 정확하지만 속도가 느린 단점이 있다. 제안된 온도 센서는 두개의 온도 측정방법을 혼합하여 고정밀 고속 온도측정이 가능하다. 또한, 칩 제작 후 온도 오차 값을 메모리회로에 저장하여 온도 오차를 보상하는 회로를 포함하여 온도센서를 구현하였다. 제안된 온도센서는 $0.35{\mu}m$ CMOS 공정으로 제작되었다. 온도 정확도, 소비 전력, 칩 면적은 각각 $0.15^{\circ}C$, $540{\mu}W$, $1.2mm^2$였다. This paper presents a high accuracy and fast hybrid on-chip temperature sensor. The proposed temperature sensor combines a SAR type temperature sensor with a ${\Sigma}{\Delta}$ type temperature sensor. The SAR type temperature sensor has fast temperature searching time but it has more error than the ${\Sigma}{\Delta}$ type temperature sensor. The ${\Sigma}{\Delta}$ type temperature sensor is accurate but it is slower than the SAR type temperature sensor. The proposed temperature sensor uses both the SAR and ${\Sigma}{\Delta}$ type temperature sensors, so that the proposed temperature sensor has high accuracy and fast temperature searching. Also, the proposed temperature sensor includes a temperature error compensating circuit by storing the temperature errors in a memory circuit after chip fabrication. The proposed temperature sensor was fabricated in 3.3V CMOS $0.35{\mu}m$ process. Its temperature resolution, power consumption, and area are $0.15^{\circ}C$, $540{\mu}W$, and $1.2mm^2$, respectively.

다중 전달 경로 채널에서의 수중 디지털 통신을 위한 선 처리 기법

김태우,황아롬,성우제,임용곤,Kim, Tae-Woo,Hwang, A-Rom,Seong, Woo-Jae,Lim, Young-Kon 한국음향학회 2008 韓國音響學會誌 Vol.27 No.3

Signals in an underwater channel get distorted by multipath propagation. In this paper, pre-coding method is suggested which helps comprehending the signals with minimum equalization. The signals are transformed based on the knowledge of the impulse response of the channel. Proposed pre-coding method is tested by simulations based on the ray theory and through water tank experiments. In weak multipath environment, in case of an SNR of about 20 dB, BER is $10^{-3}{\sim}10^{-4}$, while in strong multipath environment, similar BER is achieved with SNR of about 30 dB. In order for the pre-coding method to be used for underwater vehicles, channel prediction method utilizing the waveguide invariant is suggested and tested. 수중 채널에서의 음파를 사용한 신호는 다중 전달 경로 현상에 의해 왜곡된다. 본 논문에서는 채널의 임펄스 응답을 바탕으로 신호를 미리 왜곡시켜 수신기에 도착했을 때 최소한의 등화만으로 신호를 받을 수 있는 선 처리 기법을 제안하였다. 그리고 음선 이론 기반 시뮬레이션과 수조 실험을 통해 제안한 기법의 성능을 검토하였다. 다중 전달 경로 현상이 약할 경우, SNR이 약 20 dB 일 때 BER이 $10^{-3}{\sim}10^{-4}$의 성능을 보였고 다중 전달 경로 현상이 심한 환경에서 SNR이 약 30 dB 일때 유사한 BER 성능을 보였다. 제안한 기법을 수중 운동체의 통신에 사용가능하도록 송수신기의 위치 변화에 따른 채널예측 기법을 제안하였고 그 성능을 검토하였다.

생체의 온도 측정을 위한 수정된 마이크로파 라디오-써모미터

김태우,조태경,박병수,Kim Tae-Woo,Cho Tae-Kyung,Park Byoung-Soo 대한전자공학회 2005 電子工學會論文誌-SC (System and control) Vol.42 No.2

This paper presents a modified microwave radio-thermometer (MRTM) with material characteristic estimator and multiple temperature conversion tables to measure subcutaneous temperature of a living body This estimator provides a temperature retrieval unit with the data of material characteristics such as permittivity, conductivity, thickness and geometry of the living body. The temperature retrieval unit with multiple temperature conversion tables can select one of the tables and computes temperature value corresponding to measured radiation power. In the experiments, it was shown that the MRTM could reduce measurement errors of about $0.82^{\circ}C\;to\;7.68^{\circ}C$ for the cases of distilled water and mixed liquid at the temperature of $37^{\circ}C$. 본 논문은 생체의 내부 온도를 측정하기 위해서 매질 특성 추정기와 다중 온도 변환표를 갖는 수정된 마이크로파 라디오-써모미터(modified microwave radio-thermometer, MRTM)를 제안한다. 매질 특성 추정기는 생체의 유전을, 도전을, 두께, 형태와 같은 매질의 특성에 대한 데이터를 온도 검색 장치에 전달한다. 다중 온도 변환표를 갖는 온도 검색 장치는 이 변환표들 중 하나를 선택하여 측정된 방사 전력에 해당하는 온도값을 계산한다. 실험에서 MRTM은 $37^{\circ}C$의 온도에서 증류수와 혼합 용액에 대해서 $0.82\~7.68^{\circ}C$까지의 측정 오차를 줄일 수 있었다.

MR영상의 3차원 가시화 및 분석을 위한 뇌영역의 자동 분할

김태우,Kim, Tae-Woo 한국정보처리학회 2000 정보처리논문지 Vol.7 No.2

본 논문에서는 MR 영상의 3차원 가시화 및 분석을 위한 단일 채널 MR 영상의 자동 뇌영역 분할 방법을 제안한다. 이 방법은 4단계의 2차원 및 3차원 처리에 의하여 뇌윤곽을 찾아낸다. 1,2단계에서는 곡선 적합을 이용한 자동 문턱치화에 의하여 머리마스크와 초기 뇌마스크를 생성한다. 3단계에서 입방보간으로 초기 뇌마스크의 3차원 볼륨을 생성하여 형태학적 연산, 연결부위 레이블링에 의하여 중기 뇌마스크를 생성한다. 최종적으로 곡선 적합에 의한 자동 문턱치화를 이용하여 뇌마스크를 정련한다. 제안한 알고리즘은 영상의 슬라이스 방향을 고려할 필요가 없고 영상이 뇌 전체를 포함하지 않아도 되며, T1, T2, PD, SPGR등 다양한 종류의 MR 영상의 자동적인 뇌영역의 분할에 유용하다. 실험에서 20세트 MR 영상에 대하여 수동분할을 기준으로 0.97 이상의 유지도를 보였다. In this paper, a novel technique is presented for automatic brain region segmentation in single channel MR image data sets for 3D visualization and analysis. The method detects brain contours in 2D and 3D processing of four steps. The first and the second make a head mask and an initial brain mask by automatic thresholding using a curve fitting technique. The stage 3 reconstructs 3D volume of the initial brain mask by cubic interpolation and generates an intermediate brain mask using morphological operation and labeling of connected components. In the final step, the brain mask is refined by automatic thresholding using curve fitting. This algorithm is useful for fully automatic brain region segmentation of T1-weighted, T2-weighted, PD-weighted, SPGR MRI data sets without considering slice direction and covering a whole volume of a brain. In the experiments, the algorithm was applied to 20 sets of MR images and showed over 0.97 in comparison with manual drawing in similarity index.

한국산 섬서구메뚜기속(Atractomorpha)의 분류학적 검토

김태우,Kim, Tae-Woo Korean Society of Applied Entomology 2009 한국응용곤충학회지 Vol.48 No.4

한국산 섬서구메뚜기속(Atractomorpha)의 분류학적 검토를 통해 섬서구메뚜기(Atractomorpha lata (Motschulsky, 1866))와 분홍날개섬서구메뚜기(신칭)(A. sinensis Bolivar, 1905) 두 종을 확인하였다. 이 중 분홍날개섬서구메뚜기는 한반도 남단의 섬 제주도와 가거도로부터 처음 보고되는 한국 미기록종이다. 두 종을 비교하여 동정할 수 있는 검색표, 기재, 사진 및 분포 정보를 제시하였다. A taxonomic review of the genus Atractomorpha Saussure in Korea is presented. Two species are identified, Atractomorpha lata (Motschulsky, 1866) and a new record A. sinensis Bolivar, 1905 which is reported from the far southern islands in Korea, Gageo-do and Jeju-do. A key, descriptions, habitus photographs of adults, and distributional information are provided.

주변도로 분포가 학교건축물의 소음실태에 미치는 영향에 관한 연구

김태우,이강국,홍원화,Kim, Tae-Woo,Lee, Kang-Guk,Hong, Won-Hwa 한국교육시설학회 2011 敎育施設 Vol.18 No.4

This study investigates interior and exterior environments and arrangement forms of school buildings from elementary to high school which were recently built in Daegu since the 7th Educational Curriculum. In addition, this study analyses how outside noise affects inside environment of schools. This study found that the noise level criteria of school facilities(such as exterior learning sites and outer walls of school buildings) adjacent to street of one side satisfiedly corresponded to the level and criteria, 65dB(A), of school health law. However, the noise level and vibration criteria of school facilities adjacent to street of two sides did not satisfiedly corresponded to the level or criteria, 65dB(A). In case of classrooms, the inner noise of educational facilities with windows closed and also close to both the street of one side and of two sides satisfiedly corresponded to the level or criteria. 55dB(A), of school health law. In spring and tall, the windows are more open them usual for ventilation, and leaving windows open can lead to noise from outside. Thus, it is urgent to prepare for this situation.

열간 압연용 고속도강 롤의 고온 특성

김태우,최진원,김동규 ( Tae Woo Kim,Jin Won Choi,Dong Gyu Kim ) 한국주조공학회 1996 한국주조공학회지 Vol.16 No.2

N/A High temperature properties such as hot hardness and thermal fatigue resistance of high speed steel roll of hot finishing mill have been investigated. Two kinds of roll having compositions, Fe-1.75%C-5.9%Cr-1.74%Mo-4.94%V-2.03%W(A specimen) and Fe-2.27%C-8.86%Cr-2.91%Mo-3.92%V-1.86%W(B specimen)were prepared for investigating the microstructure and crack propagation mode. A specimen has greater amounts of M_7C₃type carbides and less amounts of MC type carbides in comparison with B specimen. Hot hardness showed sudden decrease over 400℃, resulting in the hardness decrease of 50% at the temperature of 600℃, and showed little variation with time at 500℃ and 800℃. Thermal crack was developed at 550℃ in A specimen and 600℃ in B specimen.