• 한국의류학회지
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• 제47권1호
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• pp.123-136
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• 2023

To develop smart sportswear capable of measuring biometric data, we created a close-fitting pattern using two- and three-dimensional (2D and 3D, respectively) methods. After 3D virtual fitting, the tightness of each pattern was evaluated using image processing of contact points, mesh deviation, and cross-sectional shapes. In contact-point analysis, the 3D pattern showed high rates of contact with the body (84.6% and 93.1% for shirts and pants, respectively). Compared with the 2D pattern, the 3D pattern demonstrated closer contact at the lower chest, upper arm, and thigh regions, where electrocardiography and electromyography were primarily carried out. The overall average gap was also lower in the 3D pattern (5.27 and 4.66 mm in shirts and pants, respectively). In the underbust, waist, thigh circumference, and mid-thigh circumference, the cross-section distance between clothing and body was showed a statistically significant difference and evenly distributed in the 3D pattern, exhibiting more closeness. The tightness and fit of the 3D smart sportswear sensor pattern were successfully evaluated. We believe that this study is critical, as it facilitates the comparison of different patterns through visualization and digitization through 3D virtual fitting.

• 정보관리학회지
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• 제39권1호
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• pp.119-143
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• 2022

본 연구는 미국도서관협회(American Library Association, ALA)의 인가를 받은 문헌정보학 프로그램에서 제공하는 데이터사이언스와 관련된 수업의 내용을 조사했다. 연구의 목적은 강의 계획서의 내용 분석을 통해 해당 수업에서 다뤄지는 교과목 명, 교과 설명, 학습 목표, 주차 별 주제를 살펴보는 것이다. 문헌정보학 프로그램에서의 데이터사이언스와 관련된 필수 과목 및 선택 과목은, 데이터사이언스 개론, 데이터 마이닝, 데이터베이스, 데이터 분석, 데이터 시각화, 데이터 큐레이션 및 관리, 머신 러닝, 메타데이터, 컴퓨터 프로그래밍 등 데이터사이언스 전 분야에 걸쳐 다양하게 교과목이 개설되어 있었다. 본 연구의 결과는 문헌정보학 프로그램에서 데이터사이언스 교과 과정을 개설 및 개정할 때 논의의 시작점이 될 수 있는 기초 자료가 되어 운영 역량을 강화하는데 활용되기를 기대한다.

• Advances in Computational Design
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• 제7권4호
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• pp.345-369
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• 2022

Infectious disease emergency hospitals are usually temporarily built during the pneumonia epidemic with higher requirements regarding diagnosis and treatment efficiency, hygiene and safety, and infection control.This study aims to identify how the Building Information Modeling (BIM) + Industrialized Building System (IBS) approach could rapidly deliver an infectious disease hospital and develop site epidemic spreading algorithms. Coronavirus-19 pneumonia construction site spreading algorithm model mind map and block diagram of the construction site epidemic spreading algorithm model were developed. BIM+IBS approach could maximize the repetition of reinforced components and reduce the number of particular components. Huoshenshan Hospital adopted IBS and BIM in the construction, which reduced the workload of on-site operations and avoided later rectification. BIM+IBS integrated information on building materials, building planning, building participants, and construction machinery, and realized construction visualization control and parametric design. The delivery of Huoshenshan Hospital was during the most critical period of the Coronavirus-19 pneumonia epidemic. The development of a construction site epidemic spreading algorithm provided theoretical and numerical support for prevention. The agent-based analysis on hospital evacuation observed "arched" congestion formed at the evacuation exit, indicating behavioral blindness caused by fear in emergencies.

• 인터넷정보학회논문지
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• 제25권3호
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• pp.9-18
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• 2024

Digital therapy has emerged as a novel treatment modality, propelled by advancements in information and communication technology. In the last five years, there has been a substantial surge in research publications addressing digital therapeutics (DTx) interventions, signaling a sustained upward trajectory in this field. The dynamic nature of computer science, marked by continuous innovation and development, underscores the need for agile adaptation to rapid changes. Consequently, computer science education is compelled to offer students insights into the latest trends. This research endeavors to contribute to the evolving landscape by developing textbooks that impart knowledge about DTx, an integration of information technology. The study focuses on the application of these textbooks to elementary and middle school students in South Korea. The instructional materials have been carefully organized to enable students to learn about the principle of Attention Deficit Hyperactivity Disorder (ADHD) DTx at the elementary level and the DTx that can prevent and address the digital drama at the middle school level. Based on the application of the textbook, students who received instruction using the textbook showed statistically significant improvements in all subcategories of creative problem-solving ability, including idea modification, visualization, task focus, analogy, idea generation, and elaboration (p<.01). Additionally, there were statistically significant changes in students' self-efficacy before and after using the textbook, with negative efficacy decreasing, and positive efficacy and social efficacy increasing (p<.001).

• 한국가정과교육학회지
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• 제21권2호
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• pp.45-60
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• 2009

본 연구는 중학교 기술 가정과 옷차림 단원을 위한 e-러닝 시스템을 구현함으로써 학습자의 흥미와 이해를 높여 보다 효과적인 교수 학습활동을 할 수 있게 하고 기술 가정 의생활 영역에 대한 e-러닝 개발의 기초자료가 되고자 하였다. 연구방법으로 구체적인 상황학습의 효과와 보다 현실감 있는 학습 환경을 제공하기 위해 학습내용을 학습자가 직접 클릭해서 조작할 수 있도록 구현하였고 학습자의 주의와 동기를 유발시킬 수 있도록 의류 쇼핑몰의 최신 의복자료를 이용하여 개성 있게 코디하는 방법 등을 제시하고 또래들의 패션 사진을 사례에 맞게 적절히 활용하였다. 연구의 결과를 요약하면 다음과 같다. 첫째, 시뮬레이션 조작과 가시적 관찰을 할 수 있는 학습 자료의 구현으로 보다 쉽게 학습목표에 도달할 수 있도록 하였다. 둘째, 텍스트 보다는 오디오와 이미지, 동영상 자료를 많이 사용하여 보다 효과적인 교수 학습 활동이 이루어지도록 하였다. 셋째, 옷차림 단원 학습은 특히 유행과도 관련이 있는데 멀티미디어가 갖는 현실감 있고 생동적인 교육 자료를 시의 적절하게 제공함으로써 e-러닝의 장점을 최대한 활용하였고 학습내용을 학습자 자신의 실생활과 관련된 사진이나 동영상으로 제시함으로써 학습자의 동기유발이 되도록 하였다. 이상과 같은 연구를 바탕으로 옷차림 단원의 학습에 있어 본 연구에서 사용한 저작도구 뿐 만 아니라 다양한 멀티미디어 저작도구를 활용한 e-러닝 콘텐츠 개발의 추가적 연구 활동과 풍부한 수업자료의 확보를 위한 교수 학습 자료의 DB 구축을 제언한다.

• 대한토목학회논문집
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• 제32권1A호
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• pp.31-37
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• 2012

콘크리트는 대표적인 다상 재료로서, 재료를 구성하는 각 성분의 공간적 분포는 콘크리트의 특성에 큰 영향을 미친다. 콘크리트에 존재하는 공극(void)은 콘크리트의 강도 및 투수성에 큰 영향을 주는 요인으로서, 콘크리트의 재료 물성의 파악을 위해 내부 공극의 분포를 파악하는 것은 매우 중요하다. 본 연구에서는 투수 콘크리트의 공극 분포 분석을 위해서 CT(computed tomography)로부터 얻은 단면 이미지를 중첩하여 3차원 콘크리트 디지털 시편을 생성, 공극 분포를 시각화(visualization)하였다. 공극 분포 상태를 확률적으로 묘사하기 위하여 확률 분포 함수들(two-point correlation function, lineal-path function과 two-point cluster function)을 사용하여 투수 콘크리트 디지털 시편의 공극 분포를 분석하였다. 그 결과, CT와 확률 분포 함수를 이용한 3차원 이미지 분석 방법을 통하여 투수 콘크리트 내부에 존재하는 공극의 공간적 분포에 대한 연속성, 투수성 및 이방성을 효과적으로 파악할 수 있음을 확인하였다.

• Composites Research
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• 제12권2호
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• pp.70-81
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• 1999

고분자 복합재료 제조공정인 수지이동성형(RTM) 공정은 최근 들어서 고성능 재료를 필요로 하는 항공산업분야에서 관심의 대상이 되고 있다. 본 연구에서는 유한요소/관할부피 기법을 도입한 수치모사를 통해서 수지이동 성형공정에서의 금형충전단계를 해석하였다. 섬유직조망의 투과계수를 정량적으로 측정하고, 또한 수치모사에 이용된 프로그램을 검증하기 위하여 유동가시화 실험을 수행하였다. 실험에 사용된 강화섬유와 수지물질로는 여러 가지 형태의 섬유직조망과 실리콘 기름을 선택하였다. 수치모사와 유동가시화 실험을 병행함으로써 섬유직조망의 구조, 금형의 구조, 금형삽입체가 금형충전단계에서의 수지 유동선단의 형태에 미치는 영향을 살펴보았다. 모델링에 의해 예측된 유동선단은유동가시화 실험을 통해 관찰된 결과와 잘 일치한 것으로 나타났으나, 금형내 불균일한 섬유부피분율로 인해 섬유조직망의 투과계수가 전 영역에서 일정한 값을 가지지 못하기 때문에 약간의 차이를 보여주었다. 원형의 구조물이 금형내에 삽입되어 있는 경우, 월드라인의 위치를 예측된 유동선단으로부터 정성적으로 추정할 수 있었다.

• 한국안전학회지
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• 제20권4호
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• pp.14-19
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• 2005

One area in which composites have been used rather extensively is for fabricating pressure vessel. These structures can be readily manufactured by filament winding, which is, as far as composite fabrication techniques are concerned, a relatively inexpensive method for producing composite structures. Unfortunately, the higher strength material and fabrication costs are not the only disadvantages of fiber-reinforced polymer composites when they are compared to metals. Additionally, these materials tend to exhibit brittle behavior. This is of particular concern when they are subjected to a low-velocity impact during routine handling a significant amount of structural damage can be introduced into the composites. The goals of this paper are to understand the impact damage behavior and identify the effect of surface coating materials on impact resistance in filament wound composite pressure vessels. For these, a series of low velocity impact tests was performed on specimens cutting from the full scale pressure vessel by the instrumented impact testing machine. The specimens are classified into two types with and without surface protective material. The visualization for impact damage is made by metallurgical microscope. Based on the impact force history and damage, the resistance parameters were employed and its validity in identifying the damage resistance of pressure vessel was reviewed. As the results, the impact resistance of the filament wound composites and its dependency on the protective material were evaluated quantitatively.

• 대한후두음성언어의학회지
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• 제29권2호
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• pp.70-75
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• 2018

The office-based, un-sedated vocal fold injection laryngoplasty has re-emerged in the past decade as an appealing alternative to microsuspension laryngoscopic procedure which is conducted under general anesthesia. The trend toward vocal fold injection laryngoplasty in an in-office setting was possible due to technological evolution for visualization and new injection materials. However, invisibility of the injection needle has been the main shortcomings of cricothyroid approach. The purpose of this review is to provide an up-to-date review of office-based, trans-cricothyroid membrane approach injection laryngoplasty technique under local anesthesia and efforts made to increase the preciseness of amount and location of the injected materials in the management of glottic insufficiency. A review of variable efforts undertaken to maximize the result of cricothyroid approach by technically increasing accuracy of the location of needle tip was done. With the proper patient selection and utilization of the new technologies, office-based and un-sedated vocal fold injection laryngoplasty via cricothyroid approach can be redeem as a main-stay in the management of glottic insufficiency, such as vocal fold paralysis, vocal fold paresis, vocal fold atrophy and vocal fold scar.

• Nuclear Engineering and Technology
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• 제54권10호
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• pp.3855-3863
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• 2022

An evaluation of the radiation shielding performance of high-Z-particle-loaded polylactic acid (PLA) composite materials was pursued. Specimens were produced via fused deposition modeling (FDM) using copper-PLA, steel-PLA, and BaSO₄-PLA composite filaments containing 82.7, 75.2, and 44.6 wt% particulate phase contents, respectively, and were tested under broad-band flash x-ray conditions at the Sandia National Laboratories HERMES III facility. The experimental results for the mass attenuation coefficients of the composites were found to be in good agreement with GEANT4 simulations carried out using the same exposure conditions and an atomistic mixture as a model for the composite materials. Further simulation studies, focusing on the Cu-PLA composite system, were used to explore a shield design parameter space (in this case, defined by Cu-particle loading and shield areal density) to assess performance under both high-energy photon and electron fluxes over an incident energy range of 0.5-15 MeV. Based on these results, a method is proposed that can assist in the visualization and isolation of shield parameter coordinate sets that optimize performance under targeted radiation characteristics (type, energy). For electron flux shielding, an empirical relationship was found between areal density (AD), electron energy (E), composition and performance. In cases where ${\frac{E}{AD}}{\geq}2MeV{\bullet}cm{\bullet}g^{-1}$, a shield composed of >85 wt% Cu results in optimal performance. In contrast, a shield composed of <10 wt% Cu is anticipated to perform best against electron irradiation when ${\frac{E}{AD}}<2MeV{\bullet}cm{\bullet}g^{-1}$.