Poster Session : PS 0831 ; Upper GI Tract : Clinical Factors to Predict Angiographically Detectable Non-Variceal Upper Gastrointestinal Bleeding in Patients Refractory to Endoscopic Treatment

( Tae Hwan Ha ),( Tae Hoon Oh ),( Sung In Yu ),( Min Kim ),( Jong Wook Kim ),( Won Ki Bae ),( Jae Hyung Kim ),( Seung Suk Baek ),( Mi Jin Ryu ),( Ye Na Choi ),( Ji Young Park ),( Eileen L Yoon ),( Tae 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1

Background: Non-variceal upper GI bleeding (NVUGIB) is a common medical problem that has signifi cant association with morbidity and mortality. Angiographic detection and subsequent transarterial embolization (TAE) is a primary treatment option when medical and endoscopic treatments fail. We investigated clinical factors that could affect the success of the angiographic detection and prognosis after TAE in patients with NVUGIB refractory to endoscopic therapy. Methods: A retrospective analysis of the clinical data was done in patients with failed endoscopic treatment who underwent angiography for the treatment of acute NVUGIB between May 2002 and May 2013. Patients were divided into detection or non-detection groups according to the presence of bleeding stigmata in angiographic fi nding. Rebleeding defi ned as subsequent bleeding event within 7 days and mortality within 30days were analyzed as outcome parameters after TAE following detection in angiography. Results: A total 45 patients 37 (male, mean age, 65.9±14.9 years) were analyzed and classifi ed as a detection group (n=25, 55.5%) and non-detection group (n=20, 44.6%). Peptic ulcers were the most common cause of refractory NVUGIB. Larger transfusion amount (5.7±3.9 unit vs. 3.5±2.8 unit; P=0.03), prolonged aPTT level (34.2±17.3 sec vs. 21.8±13.8 sec; P=0.01) and short time interval between last endoscopy and angiography (17.5±25.9 hours vs. 34.3±59.5 hours; P=0.04) were found to be signifi cant factors for predicting angiographic detection. TAE was performed in all patients detected in angiography. Rebleeding (44%) was significantly associated with higher Rockall score (8.3±1.5 vs. 6.6±2.4; P=0.046) and mortality (12%) was signifi cantly associated with higher Rockall score (9.3±0.6 vs. 7.1±2.2; P=0.002) and higher level of BUN (55.3±47.4 vs. 27.6±17.4; P=0.01). Conclusions: Clinical characteristics associated with angiographic detection in patients with NVUGIB refractory to endoscopic therapy were severe bleeding, bleeding tendency and early angiographic intervention. The Rockall score is useful parameter for predicting rebleeding and mortality after TAE.

계열화 및 전공코스제 운영방안

최병태,이형민,홍성준,정두진,김대곤 대구산업정보대학 2000 논문집 Vol.14 No.2

This paper is an attempt to propose our study that draw up a plan about faculty and major course to the Daegu Polytechnic College authorities. Our approach is a mixture of methods. It is systematic, in that it attempts to treat a college as a system. Through the second chapter, we examine the periodic, social, environmental, governmental, and economic context within which the College's developing effort must progress. Chapter three examines how the college systems actually design about faculty and major course. Thus, chapter four discusses how new faculty and major course participants attempt to compose a curriculum; chapter five accesses the institutions available in the College to distribute these designs. In conclusion, this paper presents that the College system would be better nine faculty; education and nurse·health field only be in administration unit, an information field be better divided into two parts: internet computer and information communication, and business and computer design faculty is established as intimate information. After all, the system will be characteristic in its information traits.

3-차원 블록인터리버기법의 터보코드를 이용한 영상통신시스템설계

최태식,공형윤,최원호 울산대학교 2001 공학연구논문집 Vol.32 No.1

본 논문에서는 3-차원 블록인터리버기법의 터보코드를 사용하여 무선 통신 환경 하에서 효과적으로 전송할 수 있는 영상 통신 시스템을 제안한다. 웨이브릿 변환과 벡터양자화를 영상의 압축알고리즘에 사용하였으며, 무선통신시스템의 코딩방식 중 하나인 터보코드를 사용하여 압축영상데이터의 통신에 사용하였다. 터보코드의 성능은 데이터율, 부호기의 구속장의 길이, 복호 방식, 순환복호의 횟수, 인터리버의 종류 및 블록크기에 의존되어 진다. 같은 비트 크기에서의 2차원 블록인터리버보다 비트간의 거리를 크게 하는 3차원 인터리빙알고리즘을 적용한 시스템이 영상통신에서 높은 성능을 얻었다. 컴퓨터 시뮬레이션을 이용하여 3차원 블록인터리버의 성능을 압축된 영상과 가우시안 잡음 채널 환경 하에서 비교분석 하였다. In this paper, an image communication system that can effectively work in wireless communication environment is proposed. The wavelet transform and the vector quantization are used to the compress images. The turbo code that is one of the coding methods in wireless communication is used for the compressed image data communication. The efficiency of turbo code depends on the data rate, the constraint length, the decoding algorithm, the number of decoding iteration, the type of interleavers and the block size. The system with 3-D interleaving algorithm whose bit distance is longer than the 2-D block interleaver in the same size had the higher performance in image transmission. To verify the performance of the proposed method, computer simulation was performed in Gaussian noise model.

21C 신지식인 양성을 위한 EQM 시스템 구축

최병태,이형민,전상봉,서승교,이우언,백종현 대구산업정보대학 2001 논문집 Vol.15 No.-

The aim of this paper is to form and to operate EQM, to say education quality management. In order to achieve the above stated purpose, the paper hypothesizes that there are similarities between enterprises and colleges in quality management. The basic method of the paper is systematic approach, modifies TQM, which is total quality management. The result is that EQM program must form and operate the feedback system for teaching and learning effect, the PSMT(project, self-study, media, team unit style teaching and learning) as a new teaching and learning method, and the digital system as an advanced mechanism, in education quality management.

Ti-Ni-Cu 납을 이용한 티타늄 납접부의 인장 및 피로강도

최규형,원대희,배태성,大川昭治,亘理文夫 大韓齒科器材學會 2001 대한치과재료학회지 Vol.28 No.4

This study was performed to evaluate the tensile and fatigue strength of butt joints in titanium soldered with Ti-Ni-Cu alloy. Titanium rods of 30 mm in length and 3 mm in diameter were divided into two groups and the soldering surfaces were polished with #240 and #2,000 emery paper, respectively. Tow pieces of titanium rods were butt-soldered with Ti-Cu-Ni alloy using the electric resistance heating under flux-argon atmosphere, the infrared heating under argon atmosphere, and the infrared heating under vacuum-argon substitution atmosphere. Tensile test was done with a crosshead speed of 0.5㎜/min using universal testing machine and fatigue test was performed by a cyclic tensile stress of 30 Hz using tension-type fatigue testing machine. The solder-matrix interface regions were etched by the solution of 20HF-20HNO_3-60glycerin and analyzed by EPMA. The fracture surfaces were examined by SEM. The maximum tensile strength value of 391.0±19.9 MP_a was obtained when the titanium surfaces were polished with #2,000 emery paper and soldered with Ti-Ni-Cu alloy using the infrared heating under vacuum-argon substitution atmosphere. Fatigue strength value of 215.8 MPa was obtained when soldered using the infrared heating under vaccum-argon substitution atmosphere. Characteristic striation and dimple regions were observed in the fractured surfaces. The EPMA data for the solder-matrix interface region revealed that the diffusion of Ni and Cu occurred in the titanium matirx.

LDPC부호화를 적용한 영상통신시스템설계

최태식,공형윤,최원호 울산대학교 2001 공학연구논문집 Vol.32 No.1

다양한 멀티미디어 통신이 발달함에 따라 채널부호화를 사용하여 오류를 정정하는 기술이 발달되어 왔다. 본 논문에서는 압축영상의 전송에서 LDPC 부호화를 이용하여 영상통신채널에서의 오류를 복원하고, 영상을 재구성할 수 있는 영상통신시스템을 제안한다. 제안된 영상통신시스템은 패리티검사행렬을 사용하여 가장 많은 오류를 발생하는 열과 가장적은 오류를 발생하는 열을 교환하는 방식을 사용하였고, 가우시안 노이즈를 가지는 통신채널의 신호 대 잡음비는 0dB에서 4dB의 범위로 설정하였다. 패리티 검사 행렬이 작은 경우 제시한 교환 방식을 사용하였을 때 사용하지 않은 경우보다 BER 성능이 우수함을 확인하였으며, 영상을 재구성한 경우에도 PSNR 성능이 우수함을 확인할 수 있었다. As a various multimedia communication has been developed, the error correction technique using the coding method was improved. In this paper, an image communication system using the LDPC decoding method for restoring the error and reconstructing the image in the image compression transmission is proposed. The proposed system has a parity check matrix that can alternate the least occurring error column with the most occurring error column. The signal to noise ratio of a communication channel with the gaussian noise was determined the range between 0dB 4dB. When a parity check matrix was a small size, the system's BER efficiency with the parity check alternating method was better than the parity check without it. Also in reconstructing image, the proposed system's PSNR efficiency was superior to system without alternating method.

표고 폐골목으로 제조한 목질보드의 성질

최용순,황원중,한태형,김남훈,권진헌 江原大學校 森林科學硏究所 1998 Journal of Forest Science Vol.14 No.-

要約표고폐골목의 재활용을 목적으로 폐골목과 정상재의 칩을 일정비율로 혼합하여 얻은 목질보드의 성질을 조사, 검토하였다. 그 결과 폐골목의 목섬유는 정상재보다 다소 짧고 표 면이 거칠었으며 폐골목 변재부의 밀도는 정상재에 비해 상당히 낮았다. 파티클보드의 두께 팽윤율 및 파괴계수의 시험결과 폐골목을 25~50% 정도 혼합한 경우는 정상재와 비슷한 값 을 나타냈다.결론적으로 폐골목은 파티클보드의 재료로 사용될 수 있고 정상재와의 혼합비율은 25~50% 범위에서 조정되어야 할 것으로 생각되었다.ABSTRACTTo provide further information for reutilization of the bed-logs decayed by oak mushroomfLentinus edodes), the properties of wood-based board prepared with mixed materials of normal wood and bed-logs were examined.Wood fibers in bed-logs showed different morphology from normal wood fibers, that is, shorter length and rough surface. Thickness swelling increased with increasing mixing ratio of bed-log. On the other hand, modulus of rupture(MOR) in bending strength decreased. In products, the visual surface of board prepared from higher mixing rate of bed-log chips was smooth.Consquently, it is considered that the optimum mixing rate of bed-log to normal wood is the range of 25-50% and the bed-log can be used for raw material of board instead of normal wood.

연세대학교 치과병원에 내원한 어린이에서의 영구치 맹출 시기 및 순서

강태성,최병재,권호근,손홍규,최형준 大韓小兒齒科學會 2005 大韓小兒齒科學會誌 Vol.32 No.4

치아의 정확한 맹출 시기와 그 순서는 어린이의 발육 성숙도의 지표로서 소아치과 임상 및 예방 교정치료에 있어서 매우 중요하다. 이에 2001~2003년에 연세대학교 치과대학병원 소아치과에 내원한 어린이중 만 5세부터 만 14세까지의 남자 654명, 여자 542명, 총 1,196명의 자료를 수집하여 영구치의 맹출 시기 및 순서에 대한 연구 결과 다음과 같은 결론을 얻었다. 1. 상악 영구치의 맹출 시기는 중절치 남 만6.81세, 여 만6.78세, 측절치 남 만8.30세, 여 만7.98세, 견치 남 만10.28세, 여 만10.04세, 제1소구치 남 만9.74세, 여 만9.90세, 제2소구치 남 만10.87세, 여 만10.41세, 제1대구치 남 만6.25세, 여 만6.54세, 제2대구치 남 만12.21세, 여 만12.03세, 여 만12.03세였다. 2. 하악 영구치의 맹출 시기는 중절치 남 만6.00세, 여 만6.06세, 측절치 남 만6.99세, 여 만6.74세, 견치 남 만9.83세, 여 만9.17세, 제1소구치 남 만9.92세, 여 만9.75세, 제2소구치 남 만10.66세, 여 만10.39세, 제1대구치 남 만5.99세, 여 만5.75세, 제2대구치 남 만11.92세, 여 만12.17세였다. 3. 영구치의 맹출 순서는 상악에서 제1대구치, 중절치, 측절치, 제1소구치, 견치, 제2소구치, 제2대구치의 순이었고, 하악에서 제1대구치, 중절치, 측절치, 견치, 제1소구치, 제2소구치, 제2대구치의 순이었다. Accurate timing and sequence of eruption of permanent teeth are indicies of growth and essential for pediatric dentistry and pediatric clinical orthodontics. From the children brought to the Yonsei Dental Hospital during 2001 to 2003, 654 boys and 542 girls, ranging in age from five to fourteen years, were selected and analysed. The following was concluded. 1. Eruption time of maxillary teeth is 6.81 years in boys, 6.78 years in girls for central incisor, 8.30 years in boys, 7.98 years in girls for lateral incisor, 10.28 years in boys, 10.04years in girls for canine, 9.74 years in boys, 9.90 years in girls for first premolar, 10.87 years in boys, 10.41 years in girls for second premolar, 6.25 years in boys, 6.54 years in girls for first permanent molar, 12.21 years in boys, 12.03 years in girls for second permanent molar. 2. Eruption time of mandibular teeth is 6.00 years in boys, 6.06 years in girls for central incisor, 6.99 years in boys, 6.74 years in girls for lateral incisor, 9.83 years in boys, 9.17 years in girls for canine, 9.92 years in boys, 9.75 years in girls for first premolar, 10.66 years in boys, 10.39 years in girls for second premolar, 5.99 years in boys, 5.75 years in girls for first permanent molar, 11.92 years in boys, 12.17 years in girls for second permanent molar. 3. The following eruption sequence was observed: the first permanent molar erupted first, followed by the central incisor, the lateral incisor, the first premolar, the canine, the second premolar and the second permanent molar in the maxilla. The first permanent molar erupted first, followed by the central incisor, the lateral incisor, the canine, the first premolar, the second premolar and the second permanent molar in the mandible.

하악 제3대구치와 하악관과의 위치관계에 대한 파노라마 방사선사진과 cone beam형 전산화단층영상의 비교

최형수,김규태,최용석,황의환 대한구강악안면방사선학회 2008 Imaging Science in Dentistry Vol.38 No.3

Purpose : To assess the diagnostic accuracy and value in an imaging technique field through the comparison of cone beam computed tomography and conventional panoramic radiography in assessing the topographic relationship between the mandibular canal and impacted third molars. Materials and Methods : Participants consisted of 100 patients offered the images through cone beam computed tomography and panoramic radiography. PSR-9000 Dental CT system (Asahi Roentgen Ind. Co., Ltd, Japan) was used as the unit of cone beam computed tomography. CE-II (Asahi Roentgen Ind. Co., Ltd, Japan) and Pro Max (Planmeca Oy, Finland) were used as the unit of panoramic radiography. The images obtained through panoramic radiography were classified into 3 types according to the distance between mandibular canal and root of mandibular third molar. And they were classified into 4 types according to the proximity of radiographic feature. The images obtained through cone beam computed tomography based on the classification above were classified into 4 types according to the location between the mandibular canal and the root and were analyzed. And they were classified into buccal, inferior, lingual, and between roots, according to the location between mandibular canal and root. The data were statistically analyzed and estimated by χ²-test. Results : 1. There was no statistical significance according to 3 types (type l, type ll, type lll) through CBCT. 2. The results of 4 types (type A, type B, type C, type D) through CBCT were as high prevalence of CBCT 1 in type A, CBCT 2 in type B, CBCT 3 in type C, and CBCT1 in type D and those of which showed statistical significance (P value=0.03). 3. The results according to location between mandibular canal and root through CBCT recorded each 49, 25, 17, 9 as buccal, inferior, lingual, between roots. Conclusion : When estimating the mandibular canal and the roots through the panoramic radiography, it could be difficult to drive the views of which this estimation was considerable. Thus it is required to have an accurate diagnostic approaching through CBCT that could estimate the location between mandibular canal and roots.

鑄鐵材料의 Melt Treatment 및 Carbon Contents에 關한 硏究

최익수,김성주,문형태,노무근 삼척대학교 산업과학기술연구소 2001 産業科學技術硏究論文集 Vol.6 No.1

It is the purpose of this study to investigate the melt treatment and properties of cast iron by varifying the holding time after inoculation treatment and carbon contents. The main results obtained by investigating the microstructure and carbon contents are as follows : The number of graphite in cast iron decreases by increasing the holding time of melts after inoculation treatment, and the coarsening of graphite is achieved by increasing the length and thickness of graphite. As the carbon contents increase in cast iron, the shape and size of graphite in cast iron structure increase continuously.