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      • KCI등재

        교정시설의 순차적 접견영역 기초연구 -한국 및 미국 교정시설의 사례분석을 중심으로

        임기택 한국셉테드학회 2019 한국셉테드학회지 Vol.10 No.1

        A visitation area, as one of the important functions in correctional facilities, is located in interface of outer area and carries on the visitation and meeting with family and friends from outside. Because of function of contacting with people from outside, rational distribution and arrangement of function in space should be carried on properly. But, Today in Korean correctional facilities have irrational structural problems in many ways. Especially, being definite differentiantion of function of visitation area between detention center and prision, it still has been mix-used and in some cases, neighboring ITR(Intake, Transfer, Release) area, it is being noticed the disorder of sequential function. The purpose of this study is to analyse the problem of function problem of visitation area in Korean correctional facility and sequantial function for visitation to improve advanced architectural particulars. 구치소 및 교도소의 기능에 있어서 접견 영역은 외부와의 접면에 위치하면서 외부인원(변호인) 및 가족들과 접견(면회)을 실시하는 영역이다. 교정, 교화에 있어서 접견은 긍정적인 역할을 하게 되는 중요한 공간이다. 그러나 오늘날 대한민국 교정시설의 접견 기능은 여러 측면에서 불합리한 구조적인 문제점을 지니고 있는 것이 현실이다. 본 연구의 목적은 현재 한국 교정시설의 접견영역에서 발생하고 있는 기능의 문제점을 살펴보고 선진 건축계획각론 사항을 연구하여 순차적인 접견 공간 기능에 대해서 분석하는 것이다. 각론상으로 대규모 시설의 경우, 분류등급 상 구분(일반, 특수)을 통하여 접견공간에 진입할 수 있도록 구분 접견실을 배치하는 것이 바람직하며 개방접견 이후 금지물품 반입 여부를 면밀하게 검색 및 조사할 수 있는 실들이 양쪽 면에서 배치되어 있도록 계획하는 것이 필요하다. 또한 대기공간 역시 필요에 따라 단체 및 개인별로 대기할 수 있는 공간과 각각의 화장실이 있는 것이 바람직하다.

      • KCI등재

        Development of Long-Term Storage Technology for Chinese Cabbage - Physiological Characteristics of Postharvest Freshness in a Cooler with a Monitoring and Control Interface

        임기택,정종훈,김장호 한국농업기계학회 2014 바이오시스템공학 Vol.39 No.3

        Purpose: The aim of this study was to develop long-term storage technology for Chinese cabbage in order to extend theperiod of availability of freshly harvested products. The scope of the paper deals with the use of a cooler with a remotemonitoring and control interface in conjunction with use of packaging film. Methods: A cooler with a real time monitoringsystem was designed as a low-temperature storage facility to control temperature and relative humidity (RH). The effects ofstorage in high-density polyethylene (HDPE) plastic boxes, 3% chitosan dipping solution, polypropylene film (PEF) withperforations, and mesh packaging bags on physiological responses were investigated. The optimal storage temperature andhumidity for 120 days were below 0.5°C and 90%, respectively. Physiological and biochemical features of cabbage qualitywere also analyzed: weight loss, texture, and sugar salinity, chlorophyll, reducing sugar, and vitamin C contents. Results: Thecooler with a remote monitoring and control interface could be operated by an HMI program. A 0.5°C temperature and 90%humidity could be remotely controlled within the cooler for 120 days. Postharvest freshness of Chinese cabbages could bemaintained up to 120 days depending on the packaging method and operation of the remote monitoring system. Inparticular, wrapping the cabbages in PEF with perforations resulted in a less than a 5% deterioration in quality. This studyprovides evidence for efficient performance of plastic films in minimizing post-harvest deterioration and maintainingoverall quality of cabbages stored under precise low-temperature conditions with remote monitoring and a controlinterface. Conclusions: Packaging with a modified plastic film and storage in a precisely controlled cooler with a remotemonitoring and control interface could slow down the physiological factors that cause adverse quality changes and therebyincrease the shelf life of Chinese cabbage.

      • KCI등재

        Cell Image Processing Methods for Automatic Cell Pattern Recognition and Morphological Analysis of Mesenchymal Stem Cells - An Algorithm for Cell Classification and Adaptive Brightness Correction -

        임기택,박수현,선우훈,정필훈,김장호,정종훈 한국농업기계학회 2013 바이오시스템공학 Vol.38 No.1

        Purpose: The present study aimed at image processing methods for automatic cell pattern recognition and morphological analysis for tissue engineering applications. The primary aim was to ascertain the novel algorithm of adaptive brightness correction from microscopic images for use as a potential image analysis. Methods: General microscopic image of cells has a minor problem which the central area is brighter than edge-area because of the light source. This may affect serious problems to threshold process for cell-number counting or cell pattern recognition. In order to compensate the problem, we processed to find the central point of brightness and give less weight-value as the distance to centroid. Results: The results presented that microscopic images through the brightness correction were performed clearer than those without brightness compensation. And the classification of mixed cells was performed as well, which is expected to be completed with pattern recognition later. Beside each detection ratio of hBMSCs and HeLa cells was 95% and 92%, respectively. Conclusions: Using this novel algorithm of adaptive brightness correction could control the easier approach to cell pattern recognition and counting cell numbers.

      • KCI등재

        Development and Evaluation of Natural Hydroxyapatite Ceramics Produced by the Heat Treatment of Pig Bones

        임기택,정종훈,김장호,김진우 한국농업기계학회 2014 바이오시스템공학 Vol.39 No.3

        Purpose: The aim of this research was to develop and evaluate natural hydroxyapatite (HA) ceramics produced from theheat treatment of pig bones. Methods: The properties of natural HA ceramics produced from pig bones were assessed in twoparts. Firstly, the raw materials were characterized. A temperature of 1,200°C was chosen as the calcination temperature. Fine bone powders (BPs) were produced via calcinations and a milling process. Sintered BPs were then characterized usingfield emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), X-ray fluorescence spectroscopy (XRF),energy dispersive X-ray spectroscopy (EDX), Fourier transform infrared (FTIR) spectroscopy, and a 2-year in vitrodegradability test. Secondly, an indirect cytotoxicity test was conducted on human osteoblast-like cells, MG63, treated withthe BPs. Results: The average particle size of the BPs was 20 ± 5 μm. FE-SEM showed a non-uniform distribution of theparticle size. The phase obtained from XRD analysis confirmed the structure of HA. Elemental analysis using XRF detectedphosphorus (P) and calcium (Ca) with the Ca/P ratio of 1.6. Functional groups examined by FTIR detected phosphate (PO43-),hydroxyl (OH-), and carbonate (CO32-). The EDX, XRF, and FTIR analysis of BPs indicated the absence of organic compounds,which were completely removed after annealing at 1,200°C. The BPs were mostly stable in a simulated body fluid (SBF)solution for 2 years. An indirect cytotoxicity test on natural HA ceramics showed no threat to the cells. Conclusions: Inconclusion, the sintering temperature of 1,200°C affected the microstructure, phase, and biological characteristics of naturalHA ceramics consisting of calcium phosphate. The Ca–P-based natural ceramics are bioactive materials with goodbiocompatibility; our results indicate that the prepared HA ceramics have great potential for agricultural and biologicalapplications.

      • 도로 진화의 시작 - 스마트하이웨이

        임기택 한국통신학회 2013 정보와 통신 Vol.30 No.11

        스마트하이웨이는 기존의 도로기술에 차량간 통신 등 첨단 ITS 통신 및 지능형 차량 제어기술을 융·복합하여 교통정체 및 사고를 미연에 방지하여 인적, 물적 손실을 최소화하는 첨단지능형 고속도로이다. 본고에서는 교통사고 발생률, 사망률 등 교통 안전도 부문에서 OECD 가입국 중 최하위권에 머물고 있는 상황을 개선하기 위하여 지난 2007년 10월부터 약 7년간 수행하고 있는 스마트하이웨이사업에 대해 살펴보고, 이 사업을 기반으로 향후 국내에서 예정되어 있는 시범사업 및 상용화 계획에 대해 알아본다.

      • KCI등재후보

        Novel Perfusion Bioreactor Systems for Tissue Engineering

        임기택,조종수,정연훈,김장호,선우훈,백수정,전성후,박주영,정필훈,정종훈,손현목 한국조직공학과 재생의학회 2009 조직공학과 재생의학 Vol.6 No.1

        Bioreactor systems that use a new aeration concept have recently been introduced. Bioreactors can assist in the development of new tissues in vitro by providing appropriate stimuli to the cell cultures. The design of bioreactors for tissue engineering is very complex and is often tailored to individual cell- engineered-tissue products. Critical elements in bioreactor systems based on cells and scaffolds include cell seeding, the nutrient and gas supply to cells, and mechanical stimuli. Flow perfusion systems have been shown to enhance cell growth, differentiation, and tissue formation as well as provide for the appropriate and necessary mass transfer of nutrients, gases, metabolites, and regulatory molecules. The beneficial effects of fluid flow induced convective transport and shear stress have been exploited in various types of bioreactors because fluid flow-through cell and tissue engineered constructs increase nutrient transport. These systems are called flow-perfusion bioreactors. In this paper, we review the characteristics of bioreactor systems used for cell culture in tissue engineering, and provide a schematic design for a novel bioreactor system that incorporates the elements we deem critical for such systems. Bioreactor systems that use a new aeration concept have recently been introduced. Bioreactors can assist in the development of new tissues in vitro by providing appropriate stimuli to the cell cultures. The design of bioreactors for tissue engineering is very complex and is often tailored to individual cell- engineered-tissue products. Critical elements in bioreactor systems based on cells and scaffolds include cell seeding, the nutrient and gas supply to cells, and mechanical stimuli. Flow perfusion systems have been shown to enhance cell growth, differentiation, and tissue formation as well as provide for the appropriate and necessary mass transfer of nutrients, gases, metabolites, and regulatory molecules. The beneficial effects of fluid flow induced convective transport and shear stress have been exploited in various types of bioreactors because fluid flow-through cell and tissue engineered constructs increase nutrient transport. These systems are called flow-perfusion bioreactors. In this paper, we review the characteristics of bioreactor systems used for cell culture in tissue engineering, and provide a schematic design for a novel bioreactor system that incorporates the elements we deem critical for such systems.

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