• 제목/요약/키워드: multidisciplinary data

검색결과 262건 처리시간 0.029초

사후전산화단층촬영의 법의병리학 분야 활용을 위한 조건부 적대적 생성 신경망을 이용한 CT 영상의 해상도 개선: 팬텀 연구 (Enhancing CT Image Quality Using Conditional Generative Adversarial Networks for Applying Post-mortem Computed Tomography in Forensic Pathology: A Phantom Study)

  • 윤예빈;허진행;김예지;조혜진;윤용수
    • 대한방사선기술학회지:방사선기술과학
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    • 제46권4호
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    • pp.315-323
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    • 2023
  • Post-mortem computed tomography (PMCT) is commonly employed in the field of forensic pathology. PMCT was mainly performed using a whole-body scan with a wide field of view (FOV), which lead to a decrease in spatial resolution due to the increased pixel size. This study aims to evaluate the potential for developing a super-resolution model based on conditional generative adversarial networks (CGAN) to enhance the image quality of CT. 1761 low-resolution images were obtained using a whole-body scan with a wide FOV of the head phantom, and 341 high-resolution images were obtained using the appropriate FOV for the head phantom. Of the 150 paired images in the total dataset, which were divided into training set (96 paired images) and validation set (54 paired images). Data augmentation was perform to improve the effectiveness of training by implementing rotations and flips. To evaluate the performance of the proposed model, we used the Peak Signal-to-Noise Ratio (PSNR), Structural Similarity Index Measure (SSIM) and Deep Image Structure and Texture Similarity (DISTS). Obtained the PSNR, SSIM, and DISTS values of the entire image and the Medial orbital wall, the zygomatic arch, and the temporal bone, where fractures often occur during head trauma. The proposed method demonstrated improvements in values of PSNR by 13.14%, SSIM by 13.10% and DISTS by 45.45% when compared to low-resolution images. The image quality of the three areas where fractures commonly occur during head trauma has also improved compared to low-resolution images.

호스피스 완화 돌봄 분야에서 일하는 사회복지사의 다학제적 팀 활동 경험에 관한 연구 - 전문적 정체성을 중심으로 - (A Study on Experiences of Social Workers Working in Hospice Palliative Care Multidisciplinary Team - Focused on Professional Identities -)

  • 최희경
    • 사회복지연구
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    • 제44권2호
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    • pp.201-230
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    • 2013
  • 본 연구에서는 본격적인 제도화를 앞두고 있는 호스피스 완화 돌봄에서 사회복지 실천의 중요성에 주목하여, 전국의 완화의료 전문기관에 소속된 11명의 사회복지사들을 대상으로 다학제적 팀 내 사회복지사의 전문적 정체성에 대해 근거이론 연구방법을 통해 살펴보았다. 분석 결과 166개의 개념과 21개의 하위범주가 도출되었으며 이를 기반으로 10개의 범주를 구성하였다. 병원 현장이라는 환경적 특성과 더불어 호스피스 완화의료 전문기관 지원사업의 문제가 근본적 원인으로 설정되었으며, 사회복지사 업무의 모호성과 사회복지사 자격 및 양성문제가 사회복지사의 전문적 정체성의 혼란에 맥락적 조건이 되는 것으로 나타났다. 성공적인 다학제적 팀 활동은 이러한 문제를 완화시킬 수 있는 중재조건이 되었다. 사회복지사들은 대인적, 개인적 대응전략을 통해 전문가로서의 존재의 의미를 인식하고 보람과 인간적 성장을 경험하였다. 범주들을 관통하는 핵심범주는 "호스피스 사회복지사로서 다른 전문직과 클라이언트에게 인정받는 전문가로 성장하기" 로 설정되었다. 호스피스 완화 돌봄의 실천현장에서 사회복지사의 전문적 정체성을 확립하고 전문가로서의 재가를 얻기 위하여 제도적 여건 개선이 필요함을 제안하였다.

뇌졸중 환자를 위한 팀접근 재활프로그램의 효과 (The Effect of a Multidisciplinary Team Approach on the Rehabilitation of Stroke Survivors)

  • 조복희
    • 재활간호학회지
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    • 제6권2호
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    • pp.137-151
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    • 2003
  • The purpose of this study was to develop a multidisciplinary team approach program for stroke survivors, and to identify its effects on their rehabilitation. The team was composed of 7 members: a rehabilitation nurse, a physician, a physical therapist, an occupational therapist, a therapeutic recreational therapist, a nutritionist, and a researcher. A quasi-experimental study was performed with 36 subjects: 18 in the experimental group and 18 in the control group, using a noneqivalent control group pretest-posttest design. The experimental group participated 4 times in rehabilitation programsfocused on information and emotional support provided by the rehabilation team-and received telephone counseling from the researcher. The control group did not receive any treatment. The selection criteria for the subjects in this study were: (a) patients who were diagnosed as having had an ischemic stroke within the last year, (b) patients free of any communication disorder, (c) and those having a primary caregiver who could assist in filling out the form assessing the level of ADL. The data were collected from patients who had been discharged from a tertiary hospital, between October 1st, 1999 and September 30th, 2000. The data were analysed by $X^2$ test, Fisher's exact test, ANCOVA, Wilcoxon's rank sum test, and Wilcoxon's signed rank test using an SAS program. The results were as follows: 1. In terms of physical variables (blood pressure, grasp power, and ADL) 1) There was a significant difference in blood pressure between the two groups (systolic pressure P= .012, diastolic pressure P= .050). 2) There was also a significant difference in grasp power between the two groups (affected side : P= .012, unaffected side : P= .010). 3) There was no significant change in the level of ADL between the two groups. 2. In terms of psychosocial variables (depression, self-efficacy, self-esteem, and social activities) 1) There were no significant differences between the two groups. However, all four psychosocial variables showed a tendency to improve in the experimental group, while only two variables (depression and self-efficacy) showed a simalar tendency in the control group. 2) The level of social activities in the control group decreased significantly after a month (P= .050). 3. The level of life satisfaction improved in both groups, but no significant difference was found. Stroke has high recurrence rate and requires considerable follow-up care. The program used in this study was developed and designed for stimulting the rehabilitation process of stroke survivors. Through the program period of one month (meetings were held weekly), a positive effect was detected in physical variables, although the psychosocial variables did not improve significantly. In retrospect, a one month period may not be an adequate length of time to improve the psychosocial variables, as the stroke survivors were complicated cases, and most of them were elderly. Further research is therefore recommended by increasing the length of program, so that its effect can be more noticeable.

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지오매틱스/지오인포매틱스의 형성과 교과과정 개발연구 (The Formation and Curriculum Development of Geomatics/Geoinformatics)

  • 고준환
    • 한국측량학회지
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    • 제16권2호
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    • pp.259-270
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    • 1998
  • 본 연구는 최근 대학에서 정규학과로 새롭게 설치되고 있는 지오매틱스/지오인포매틱스 분야의 학문적인 체계화를 위하여 국내외 관련분야의 교과목의 비교연구를 통하여 시범적인 교과과정을 제시하는 것이 목적이다. 지오매틱스/지오인포매틱스 교과과정을 제시하기 위하여 국내외 관련학과의 교과과정을 문헌 및 인터넷 등을 통하여 수집 비교 분석하였다. 아울러 현재 국가지리정보시스템(NGIS) 구축에 의해 진행되고 있는 도시정보화 사업, 시설물관리, 지적도 전산화, 지적재조사 사업 등 관련 분야에 대한 국가와 지방자치단체, 시스템통합(SI)업체 등의 사회적 수요를 파악하여 새로이 제시할 교과과정에 반영될 수 있도록 하였다. 본 연구를 통하여 지오매틱스/지오인포매틱스 분야의 표준 교과과정(안)을 제시하고자 하였다. 본 연구에서 제시된 교과과정(안)은 종합과학적인 학문적 특성을 고려하여 측량/지도제작 술과 컴퓨터/정보과학을 기반으로 지속 가능한 도시관리와 관련된 계획기법 및 관련법 제도 등을 포함하고 있다. 향후 교과과정(안)에 따라서 표준적인 교재개발과 관련분야 자격증의 신설 등에 대한 연구가 필요하다고 하겠다.

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Residual capacity assessment of post-damaged RC columns exposed to high strain rate loading

  • Abedini, Masoud;Zhang, Chunwei
    • Steel and Composite Structures
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    • 제45권3호
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    • pp.389-408
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    • 2022
  • Residual capacity is defined as the load carrying capacity of an RC column after undergoing severe damage. Evaluation of residual capacity of RC columns is necessary to avoid damage initiation in RC structures. The central aspect of the current research is to propose an empirical formula to estimate the residual capacity of RC columns after undergoing severe damage. This formula facilitates decision making of whether a replacement or a repair of the damaged column is adequate for further use. Available literature mainly focused on the simulation of explosion loads by using simplified pressure time histories to develop residual capacity of RC columns and rarely simulated the actual explosive. Therefore, there is a gap in the literature concerning general relation between blast damage of columns with different explosive loading conditions for a reliable and quick evaluation of column behavior subjected to blast loading. In this paper, the Arbitrary Lagrangian Eulerian (ALE) technique is implemented to simulate high fidelity blast pressure propagations. LS-DYNA software is utilized to solve the finite element (FE) model. The FE model is validated against the practical blast tests, and outcomes are in good agreement with test results. Multivariate linear regression (MLR) method is utilized to derive an analytical formula. The analytical formula predicts the residual capacity of RC columns as functions of structural element parameters. Based on intensive numerical simulation data, it is found that column depth, longitudinal reinforcement ratio, concrete strength and column width have significant effects on the residual axial load carrying capacity of reinforced concrete column under blast loads. Increasing column depth and longitudinal reinforcement ratio that provides better confinement to concrete are very effective in the residual capacity of RC column subjected to blast loads. Data obtained with this study can broaden the knowledge of structural response to blast and improve FE models to simulate the blast performance of concrete structures.

초고온 진공로 설계를 위한 데이터베이스 구축 (Implementing Database for Designing Super High Temperature Vacuum Furnace)

  • 김종화;도상윤;이재우;정갑주
    • 한국경영과학회:학술대회논문집
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    • 대한산업공학회/한국경영과학회 2004년도 춘계공동학술대회 논문집
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    • pp.273-276
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    • 2004
  • Multidisciplinary Design Optimization (MDO) is an individual and parallel design framework applied in designing large and complex systems. for successful implementation of MDO framework it is essential to manage data in efficient and integrated manner. In this study, we present a case study to implement database to support designing super high temperature vacuum furnace with MDO technology. For that purpose we first extract required data based on the analysis of design process and then data flows between different programs are analyzed. Finally an E-R diagram is presented to design database schema.

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The Security and Privacy Issues of Fog Computing

  • Sultan Algarni;Khalid Almarhabi;Ahmed M. Alghamdi;Asem Alradadi
    • International Journal of Computer Science & Network Security
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    • 제23권4호
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    • pp.25-31
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    • 2023
  • Fog computing diversifies cloud computing by using edge devices to provide computing, data storage, communication, management, and control services. As it has a decentralised infrastructure that is capable of amalgamating with cloud computing as well as providing real-time data analysis, it is an emerging method of using multidisciplinary domains for a variety of applications; such as the IoT, Big Data, and smart cities. This present study provides an overview of the security and privacy concerns of fog computing. It also examines its fundamentals and architecture as well as the current trends, challenges, and potential methods of overcoming issues in fog computing.

나셀 라이다 측정 데이터 특성 분석 및 신뢰성 검증 (Characteristics Analysis and Reliability Verification of Nacelle Lidar Measurements)

  • 신동헌;고경남;강민상
    • 한국태양에너지학회 논문집
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    • 제37권5호
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    • pp.1-11
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    • 2017
  • A study on Nacelle Lidar (Light detection and ranging) measurement error and the data reliability verification was carried out at Haengwon wind farm on Jeju Island. For measurement data error processing, the characteristics of Nacelle Lidar measurements were analyzed by dividing into three parts, which are weather conditions (temperature, humidity, atmosphere, amount of precipitation), mechanical movement (rotation of wind turbine blades, tilt variation of Nacelle Lidar) and Nacelle Lidar data availability. After processing the measurement error, the reliability of Nacelle Lidar data was assessed by comparing with wind data by an anemometer on a met mast, which is located at a distance of 200m from the wind turbine with Nacelle Lidar. As a result, various weather conditions and mechanical movement did not disturb reliable data measurement. Nacelle Lidar data with availability of 95% or more could be used for checking Nacelle Lidar wind data reliability. The reliability of Nacelle Lidar data was very high with regression coefficient of 98% and coefficient of determination of 97%.

성산 풍력발전단지의 연간발전량 예측 정확도 평가 (Accuracy Assessment of Annual Energy Production Estimated for Seongsan Wind Farm)

  • 주범철;신동헌;고경남
    • 한국태양에너지학회 논문집
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    • 제36권2호
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    • pp.9-17
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    • 2016
  • In order to examine how accurately the wind farm design software, WindPRO and Meteodyn WT, predict annual energy production (AEP), an investigation was carried out for Seongsan wind farm of Jeju Island. The one-year wind data was measured from wind sensors on met masts of Susan and Sumang which are 2.3 km, and 18 km away from Seongsan wind farm, respectively. MERRA (Modern-Era Retrospective Analysis for Research and Applications) reanalysis data was also analyzed for the same period of time. The real AEP data came from SCADA system of Seongsan wind farm, which was compare with AEP data predicted by WindPRO and Meteodyn WT. As a result, AEP predicted by Meteodyn WT was lower than that by WindPRO. The analysis of using wind data from met masts led to the conclusion that AEP prediction by CFD software, Meteodyn WT, is not always more accurate than that by linear program software, WindPRO. However, when MERRA reanalysis data was used, Meteodyn WT predicted AEP more accurately than WindPRO.

다학제적 데이터 융합에 기초한 우박위험지도 (Hail Risk Map based on Multidisciplinary Data Fusion)

  • 김수현;이승재;심교문
    • 한국농림기상학회지
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    • 제24권4호
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    • pp.234-243
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    • 2022
  • 우리나라에서 우박에 의한 피해는 매년 발생하고 있으며, 특히 농업 분야의 경우 노지 작물과 재배 시설에 치명적인 손실을 입히고 있다. 이러한 우박 피해를 최소화하기 위해 국내 주산지 분포와 작물 생육에 맞춤화 된 우박정보 서비스 시스템의 개발이 필요하다. 그러나 우박의 관측은 다른 기상 변수에 비해 상대적으로 많은 어려움이 따르고 자료도 시공간적으로 불균일성이 크며 산발적이다. 이에 본 연구는 우박정보 서비스 시스템 개발의 일환으로 우박 발생에 대한 시·공간 분포를 파악하기 위해 자연과학적 자료인 기상청 목측자료와 사회과학적 자료인 신문기사 자료를 통합한 우박 관측 DB를 구축하고, 이를 기반으로 우박위험지도를 제작하였다. 이러한 다학제적 우박 자료 융합을 통해 우박 자료의 공백기간과 공백지역에 대해서 보완이 될 수 있었다. 지역별 우박 발생 시기와 빈도 및 크기에 대해 분석한 결과, 최근으로 올수록 크기가 큰 우박의 비중이 증가하였고, 발생 시간은 상승기류가 잘 형성되는 오후 시간대에 주로 분포하였다. 강원, 경북, 충북 등 남한의 북동쪽과 일부 내륙 지역이 더 자주 발생하였고, 겨울에는 북쪽 해안과 일부 내륙 지역에 주로 싸락 우박이 발생하였다. 통합 자료를 이용하여 제작한 우박 위험지도를 통해 1970~2018년 기간의 전국적인 발생 분포 특성과 극값들이 제시되었다. 이번 연구에서 제작된 우박위험지도는 작물 재배적지 선정과 생육 관리에 다학제적인 응용기후 자료로서 도움을 줄 것이다.