• 제목/요약/키워드: Open Cell

검색결과 1,061건 처리시간 0.036초

오픈 소스 라이브러리를 활용한 HCS 소프트웨어 개발 (Development of HCS(High Contents Screening) Software Using Open Source Library)

  • 나예지;호종갑;이상준;민세동
    • 정보처리학회논문지:소프트웨어 및 데이터공학
    • /
    • 제5권6호
    • /
    • pp.267-272
    • /
    • 2016
  • 생물정보학분야에서 현미경을 통해 얻은 세포 영상은 생물학적 정보를 얻기 위한 중요한 지표이다. 연구자들은 영상을 육안으로 분석하기 때문에 분석에 많은 시간과 고도의 집중력이 요구된다. 게다가 연구자의 주관적 관점이 분석에 개입되어 결과를 객관적으로 정량화하는데 어려움이 있다. 따라서 본 연구에서는 OpenCV 라이브러리를 이용하여 세포의 자동 분석을 위한 HCS(High Content Screen) 알고리즘을 개발하였다. HCS 알고리즘은 이미지 전처리 과정, 세포 계수, 세포 주기와 분열지수 분석 기능을 포함한다. 본 연구에서는 공초점 레이저 현미경을 통해 얻은 위암세포(MKN-28) 영상을 분석에 사용하였으며, 성능 평가를 위해 세포영상 분석 프로그램인 ImageJ와 전문 연구원의 세포 계수 분석결과를 비교하였다. 실험 결과 HCS 알고리즘의 평균 정확성이 99.7%로 나타났다.

Open셀제어기 개발을 통한 CIM시스템 구축을에 관한 연구 (Study of a Open Cell Controller for CIM)

  • 최경현;김성청
    • 한국정밀공학회:학술대회논문집
    • /
    • 한국정밀공학회 1997년도 춘계학술대회 논문집
    • /
    • pp.422-425
    • /
    • 1997
  • Computer Integrated Manufacturing (CIM) is undoubtedly one of the most influential concepts to have been introduced into the manufacturing world in recent times. The successful CIM application is greatly depended on the way of the approach to given manufacturing environments. This paper reports a new approach in building CIM systems trough the development of a poen cell controller.

  • PDF

초저주파 대역 수중 자체소음 저감에 관한 실험 연구 (An Experiment on Reduction of Infrasonic Underwater Self-Noise)

  • 이성욱;이용국;김성렬
    • 한국음향학회지
    • /
    • 제30권1호
    • /
    • pp.17-21
    • /
    • 2011
  • 수중에서 음향신호를 측정할 때에 청음기 주위에서의 유동에 의해 발생하는 초저주파 대역 자체소음을 저감시키기 위해 청음기 주위에 다공성 발포재를 씌우는 기법의 효과를 해상 실험을 통해 고찰하였다. 두께가 다른 10 ppi 폴리우레탄 발포재를 이용하여 실험한 결과, 2-10 Hz 대역에서 발포재의 두께가 1 cm일 때에는 최대 20 dB 그리고 발포재의 두께가 3 cm인 경우에는 최대 28 dB의 자체소음 저감 효과가 있음을 확인하였다.

인산형 단위 연료전지의 조업 연구 (Operational Study of the Phosphoric Acid Type Unit Fuel Cell)

  • 이갑수;김화용
    • 한국수소및신에너지학회논문집
    • /
    • 제3권2호
    • /
    • pp.63-69
    • /
    • 1992
  • 2개의 단위전지를 제작하여 각각 산소와 공기를 산화제로 하여 조업하였다. 산소를 사용한 단위전지의 350시간 조업후의 개전압 강하는 30mV였고 내부저항도 증가하였다. 공기를 사용한 단위천지의 250시간 조업후의 개전압강하는 130mV였고 산소를 사용한 경우와는 개전압 차이는 90mV였다. 공기를 이용한 단위전지의 조업 성능을 향상시키기 위하여는 전해질의 공급방법과 전극의 물질전달특성에 관한 연구가 필요하다.

  • PDF

인공습지 내 개방수역 조성에 따른 처리효율분석 (Analysis of Treatment Efficiency according to Open-water in Constructed Wetland)

  • 김형철;윤춘경;엄한용;김형중;함종화
    • 한국물환경학회지
    • /
    • 제24권6호
    • /
    • pp.709-717
    • /
    • 2008
  • The field scale experiment which is constructed with four sets (0.88 ha for each set) of wetland (0.8 ha) and pond (0.08 ha) systems was performed to examine the effect of plant coverage on the constructed wetland performance and to recommend the optimum development and management of macrophyte communities. After six growing seasons of wetlands, plant coverage was about 100%. And the concentration of DO showed low value (1.0~5.4 mg/L). This is caused by a blighted plant consumed dissolved oxygen with decay in water column. As the result, water column went to be anaerobic conditions and T-N removal rate are 58~67%. Dead vegetation increased nitrogen removal during winter because it is a source of organic carbon which is an essential parameter in denitrification. However, wetland released phosphorus caused by a blighted plant and accumulation, the removal rate of phosphorus might be decreased. To rise of DO concentration, the three open-waters were constructed in cell 3 and 4. Cell 3 has two open-waters (width 10 m, depth 1.8 m) and cell 4 has one open-water (width 20 m, depth 1.8 m). As the result, DO concentration and treatment efficiency of nutrient and BOD were improved. In case that constructed wetland is operated for a long time, physical circulation structure such as open water help continuous circulation of aerobic and anaerobic conditions. Through the constructed open-water, treatment efficiency of phosphorus and nitrogen in wetland could be improved effectively.

마이크로 X-ray CT를 활용한 알루미늄 개방형 폼의 형상 및 압축 거동 분석 (Analysis of 3D Geometry and Compressive Behavior of Aluminum Open Cell Foam Using X-ray Micro CT)

  • 김영일;김지훈;이종국;김대용
    • 소성∙가공
    • /
    • 제20권7호
    • /
    • pp.518-523
    • /
    • 2011
  • The three dimensional geometries of an aluminum open cell foam before and after uniaxial compressive loading were investigated using the X-ray micro CT(computed tomography). Aluminum 6101-T6 open cell foams of 10, 20, 40 ppi (pore per inch) were considered in this work. After the serial sectioning CT images of aluminum foams were obtained from non-destructive X-ray images, the exact 3D structure were reproduced and visualized with commercial image processing program. The relative density ratio was around the 7.0 to 9.0 range, the unit cells showed anisotropic shapes having the different dimensional ratios of 1.1 to 1.3 between the rise and the transverse directions. The yield stress increased with the relative density ratio and the volumetric strain increased proportionally with compressive strain. The plateau stress in the compressive stress-strain curve was caused by the buckling of ligaments.

Enhancement of Re-closure Capacity by the Intra-amniotic Injection of Human Embryonic Stem Cells in Surgically Induced Spinal Open Neural Tube Defects in Chick Embryos

  • Lee, Gun-Soup;Lee, Do-Hun;Kim, Eun-Young;Wang, Kyu-Chang;Lee, Won-Don;Park, Sepill;Lim, Jin-Ho
    • 한국동물번식학회:학술대회논문집
    • /
    • 한국동물번식학회 2004년도 춘계학술발표대회
    • /
    • pp.275-275
    • /
    • 2004
  • To evaluate the potential of the stem cell therapy as a method for prenatal management of spinal open neural tube defect (ONTD), the influence of embryonic stem cells injected into the amniotic cavity on the re-closure capacity of spinal ONTD was investgated. Spinal neural tube was incised open for a length of 6 somites using chick embryos of Hamburger and Hamilton stage 18 or 19. (omitted)

  • PDF

γ-Aminobutyric Acid Metabolism in Plant under Environment Stressses

  • Ham, Tae-Ho;Chu, Sang-Ho;Han, Sang-Jun;Ryu, Su-Noh
    • 한국작물학회지
    • /
    • 제57권2호
    • /
    • pp.144-150
    • /
    • 2012
  • ${\gamma}$-Aminobutyric acid (GABA) is a non-protein amino acid that is widely distributed in plant and animal kingdom. GABA is found in tissues of the central nervous system (CNS) in animals. GABA functions as a the major inhibitory neurotransmitter in the CNS by acting through the GABA receptors. Clinical studies have revealed the relationship between an increased intake of GABA or analogues with several health benefits, including lowering of blood pressure in mildly hypertensive animals and humans. Furthermore, GABA would also has an inhibitory effect on cancer cell proliferation, stimulates cancer cell apoptosis and plays a role in alcohol-associated diseases and schizophrenia. In plants, interest in the GABA emerged mainly from experimental observations that GABA is largely and rapidly produced in large amounts in response to biotic and abiotic stresses. In this study, we speculated the properties and metabolism of GABA in plant and functions in relation to the responses to environmental stresses.

휴대전원용 직접알코올 연료전지의 OCV특성 연구 (Operating Characteristics on Coupling of Fuel-Cell System with Natural Gas Reformer)

  • 박세준;최용성;이경섭
    • 전기학회논문지P
    • /
    • 제58권4호
    • /
    • pp.592-596
    • /
    • 2009
  • DAFC(direct alcohol fuel cell) takes the same structure and operational principle with PEMFC(Proton exchange membrane fuel cell). However, DAFC, which uses liquid alcohol instead of hydrogen as fuel, is able to be used as a portable power for small-scaled electronic devices such as MP3, PMP, and mobile phone because alcohol is quite convenient steady-state compound to carry and store it. This paper presents the OCV(open circuit voltage) characteristics of the cases which are alcohol species and different weight rate of ethanol, respectively. The OCV of methanol fuel cell is slightly higher 0.2V than ethanol one, and 8% wt. rate ethanol is rated as the most appropriate fuel for DAFC.

모바일 연료전지용 초소형 수소 레귤레이터 (Small Hydrogen Regulator for Mobile Fuel Cells)

  • 김형진;서영호;김병희
    • 한국생산제조학회지
    • /
    • 제20권2호
    • /
    • pp.129-132
    • /
    • 2011
  • This paper presents small hydrogen regulator for the mobile fuel cell. Mobile fuel cell is generally classified into open-end type and dead-end type. In the open-end type, flow rate of hydrogen is constantly controlled, while pressure of hydrogen is constantly maintained in the dead-end type. Considering the efficiency and stability of the fuel usage, dead-end type is more suitable with mobile fuel cell. Mobile fuel cell operated by dead-end mode requires hydrogen regulator which controls the hydrogen pressure from 0.1bar to 0.5bar within 3% error. In this paper, small hydrogen regulator (volume of 2.6cc) was fabricated by stainless steel. Regulation characteristics was experimentally evaluated.