• Archives of Plastic Surgery
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• 제42권3호
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• pp.267-277
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• 2015

Three-dimensional (3D) printing has been particularly widely adopted in medical fields. Application of the 3D printing technique has even been extended to bio-cell printing for 3D tissue/organ development, the creation of scaffolds for tissue engineering, and actual clinical application for various medical parts. Of various medical fields, craniofacial plastic surgery is one of areas that pioneered the use of the 3D printing concept. Rapid prototype technology was introduced in the 1990s to medicine via computer-aided design, computer-aided manufacturing. To investigate the current status of 3D printing technology and its clinical application, a systematic review of the literature was conducted. In addition, the benefits and possibilities of the clinical application of 3D printing in craniofacial surgery are reviewed, based on personal experiences with more than 500 craniofacial cases conducted using 3D printing tactile prototype models.

• 한국HCI학회:학술대회논문집
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• 한국HCI학회 2006년도 학술대회 1부
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• pp.355-361
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• 2006

In large scale environments like airport, museum, large warehouse and department store, autonomous mobile robots will play an important role in security and surveillance tasks. Robotic security guards will give the surveyed information of large scale environments and communicate with human operator with that kind of data such as if there is an object or not and a window is open. Both for visualization of information and as human machine interface for remote control, a 3D model can give much more useful information than the typical 2D maps used in many robotic applications today. It is easier to understandable and makes user feel like being in a location of robot so that user could interact with robot more naturally in a remote circumstance and see structures such as windows and doors that cannot be seen in a 2D model. In this paper we present our simple and easy to use method to obtain a 3D textured model. For expression of reality, we need to integrate the 3D models and real scenes. Most of other cases of 3D modeling method consist of two data acquisition devices. One for getting a 3D model and another for obtaining realistic textures. In this case, the former device would be 2D laser range-finder and the latter device would be common camera. Our algorithm consists of building a measurement-based 2D metric map which is acquired by laser range-finder, texture acquisition/stitching and texture-mapping to corresponding 3D model. The algorithm is implemented with laser sensor for obtaining 2D/3D metric map and two cameras for gathering texture. Our geometric 3D model consists of planes that model the floor and walls. The geometry of the planes is extracted from the 2D metric map data. Textures for the floor and walls are generated from the images captured by two 1394 cameras which have wide Field of View angle. Image stitching and image cutting process is used to generate textured images for corresponding with a 3D model. The algorithm is applied to 2 cases which are corridor and space that has the four wall like room of building. The generated 3D map model of indoor environment is shown with VRML format and can be viewed in a web browser with a VRML plug-in. The proposed algorithm can be applied to 3D model-based remote surveillance system through WWW.

• 한국산학기술학회논문지
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• 제20권12호
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• pp.182-189
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• 2019

3D 프린팅 기술은 공급자 중심의 대량 생산에서 수요자 중심의 다양한 디자인을 만족하게 하는 패러다임의 변화를 가져오고 있다. 건축분야 3D 프린팅 기술은 모듈러 건축과 더불어 기존의 습식공법을 대체할 수 있는 새로운 시공방법으로 기대되고 있다. 최근 북미, 유럽, 아시아 등 다수의 국가에서 모르타르 계열의 재료를 활용한 3D 프린팅 건축물 구축 사례가 경쟁적으로 발표되고 있다. 3D 프린팅 기술의 핵심은 3D 프린팅 장비, 재료, 3D 모델링 및 슬라이싱 기능이다. 건축분야에서는 기존 제조업에서 상용화된 슬라이싱 기능을 보완하여 사용하고 있다. 본 연구에서는 건축분야의 3D 모델링을 3D 프린팅 장비로 출력하기위해 슬라이싱 기능이 포함된 설계지원도구를 개발한다. 기존 제조업 분야에서 3D 모델링 이후 출력까지의 과정을 분석하고, 특히 기존에 상용화된 슬라이싱 프로그램들의 기능을 분석한다. 또한 기존 사례 및 전문가 검토, 관련 문헌 등을 분석하여 건축분야에 필요한 슬라이싱 기능 7가지를 도출하였다. 도출된 기능들은 슬라이싱 기능에서 보다 확장하여 설계지원도구라고 명명하였다. 향후 도출된 기능들에 대한 상세한 알고리즘 및 프로세스의 개발이 필요하다.

• Journal of Yeungnam Medical Science
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• 제12권1호
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• pp.105-112
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• 1995

During the period of 9.5 years from September, 1985 to March, 1995, 32 cases with spontaneous closure in simple ventricular septal defect(VSD) were observed and evaluated at Yeungnam University Hospital, and those were confirmed by 2D-echocardiogram. The results were as follows: 1. Among these 32 cases, there were 23 cases(71.9%) of perimembranous VSD, 8 cases(25.0%) of muscular VSD and 1 case(3.1%) of subarterial VSD. Septal aneurysms appears to be main mechanism of spontaneous closure of VSD because of the presence of septal aneurysm in all cases with spontaneous closure of a perimembranous VSD. 2. The size of the defect was variable in diameter, but 27 cases(81.2%) were less than 5 mm. 3. The mean age was 12.1 months at spontaneous closure with the range from 1 month old to 72 months. 4. The mean weight was 9.0 kg at spontaneous closure. 5. Among these 32 cases, 3 cases had the clinical evidence of cardimegaly or congestive hert failure during infancy. 6. Male to female sex ratio was 1.5:1.

• 대한기관식도과학회:학술대회논문집
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• 대한기관식도과학회 1978년도 제12차 학술대회연제 순서 및 초록
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• pp.6.1-6
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• 1978

연하곤란은 질병이나 기능장애의 출현을 나타내는 증세로서 원인 및 발생부위가 다양하다. 1977연도 1년간 서울대학병원 이비인후과 외래에 연하곤란을 주소로 내원한 133명의 환자를 임상통계적으로 고찰하여 다음과 같은 결과를 얻었다. 1. 연하곤란을 주소로 내원한 환자는 전체 이비인후과 외내 내원환자 9313명의 2. 1%에 해당한다. 2. 성별남여의 비는 1.3 : 1로 남자가 약간 많았고, 평균연령은 35.7세이다. 3. 자각증상의 지속기간은 평균 251일이나, 1년이상의 식도부식증 8례를 제외하면 평균 40일이다. 좀 더 자세히 분류하면 1주 이하 67례(50.4%), 1주∼1개월 24례(18.0%), 1개월∼l년 34례(25.6%), 1년 이상 8례(6.0%)로 나타났다. 4. 발생부위별로 보면 식도 27례(20.3%)보다 구강 일인두 일후두 등이 106례(79.3%)로 약 4배가 된다. 5. 원인적 요소를 보면 염증성 67례(50.4%), 종양성 28례(21.0%), 부식제의 오연사고 14례(10.5%), 이물 11례(8.3%)등의 순이다. 6. 질병별로 보면 인두염 및 편도염 42례(31.6%), 식도부식증 14례(10.5%), 구내염 14례(10.5%), 후두종양 12례(9.0%), 편도주위농양 9례(9.8%), 식도이물 7례(5.2%), 설종양 7례(5.2%), 편도종양 6례(4.5%), 인두이물 4례(3.0%)등의 순이다.

• 대한자기공명의과학회:학술대회논문집
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• 대한자기공명의과학회 2001년도 제6차 학술대회 초록집
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• pp.136-136
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• 2001

Purpose： Subclavian steal refers to the retrograde flow of blood in a vertebral artery that supplies t ipsilateral shoulder and arm caused by proximal subclavian artery stenosis or occlusion. T purpose of this exhibit is to demonstrate MR findings of subclavian steal on contrast-enhanc 3D (CE 3DMRA) and 2D TOF MR angiography. Method： Four patients(men 3 and women 1, age： 28-78years) with subclavian steal obtained both CE 3DMRA and digital subtraction angiography(DSA) including subclavian arterie Sequential imaging was undertaken during first pass after double dose of Gd-DTPA (0 mM/kg) Injected by a power injector. Coronal source images were obtained with coronal D-fast low angle shot sequence(TR/TE/flip angle=3.8/l.3/35, acquisition time= 10sec/one measurement). Precontrast imaging was subtracted from enhanced images and maximu intensity projection was done. 2D time-of-flight MR angiography(2D TOF) of the carot bifurcation was added in all cases with post-saturation. All studies were review retrospectively.

• 한국의상디자인학회지
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• 제26권2호
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• pp.33-43
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• 2024

This study comprehensively analyzes previous research comparing the similarities between 3D virtual and actual fittings, and identifies the current usage and limitations of virtual fitting programs. The findings reveal that, in most cases, 3D virtual fittings are not perfect substitutes for actual fittings. To address these limitations, this research focuses on the Hohenstein fitting test and BP-ANNs-based garment fit evaluation method, which incorporate various parameters, such as the correlation between wearers and garments, garment pressure, and ease, thus providing objective data, such as data acquired that can enhance subjective evaluations. By integrating such objective assessments, the study suggests potential improvements in virtual fitting accuracy. This research is expected to provide foundational data necessary for the development of a consumer virtual fitting systems alongside advancements in 3D virtual fitting technology.

• 한국안전학회지
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• 제22권2호
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• pp.41-46
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• 2007

This paper considers the electrical shock risk of the human body due to underwater leakage current in such places of public baths. Many submerged electric facilities in a public bath may create a severe electric shock hazard for the human body, since wet body in an accidentally energized bathtub can result in low electrical resistance through the human body for leakage or fault currents. Therefore a major consideration, in the context of electrical safety underwater, is the shock risk to the bather as a result of electric current flowing through the water in bathtub. To assess the electric shock risk and to analyze the potential distribution in a bathtub, 2 different situation cases are set up, then experimental and simulation methods are adopted. The validity of 2 cases of simulation and experiment data in a bathtub for electric distribution underwater are compared and analyzed. Also electric shock risk assessment underwater in a real public bathtub by simulation program package, Flux 3D, was conducted herein, and the results are presented and discussed.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2004년도 Proceedings of ISRS 2004
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• pp.318-321
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• 2004

The damage scale and damage area in the coast have been increased dramatically because of calamities such as typhoon. tidal wave. flood and storm. Especially. 409 cases. which reach to about $40.9\%$ of natural disasters of 1,000 cases for the recent 15 years have happened on coast area. More than $40\%$ of natural disasters also occurred every year is happening in coastland. Therefore, there is a great need to construct all related GIS database such as atmospheric phenomena (typhoon. tidal wave, flood and storm). harbor facility, harbor traffic and ebb and flow. Furthermore. the certain system should be developed and integrated with NDMS (National Disaster Management System) by using 3D web GIS technology. In this study. the coast disaster area management system was designed and developed by using 3D web GIS technique so that the coast disaster area could be monitored and managed in real time and in visual. Finally. the future disaster in coast area could be predicted scientifically.

• 혜화의학회지
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• 제26권1호
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• pp.81-87
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• 2017

이 증례보고의 목적은 도침 시술이 외상성으로 유발된 급성 요배통 환자의 통증, 기능, 삶의 질에 미치는 영향을 보고하기 위함이다. 1주일 이내의 외상성 계기로 인해 요배통을 호소하는 총 3명의 환자에게 도침 시술을 시행하여 NRS, ROM, RMDQ, EQ VAS에서 유의한 호전이 있었으며 EQ-5D의 경우 증례 1,3에서 유의한 호전이 있었다. 향후 보다 많은 증례보고 및 연구가 필요할 것으로 사료된다.