• 한국항해항만학회:학술대회논문집
• /
• 한국항해항만학회 2013년도 추계학술대회
• /
• pp.215-218
• /
• 2013

본 논문은 낙뢰 Surge 방호를 위하여 독립접지를 공통접지로 개선하는 효율적인 방법을 제안하였다. 낙뢰 Surge 방호를 위해서는 등전위 이론에 근거하는 공통접지방식이 적합하고, 중성선이 있는 전원계통에서는 공통접지방식을 사용하는 것이 국제적으로 통용되는 기술규격이다. 따라서 낙뢰 Surge에 취약한 문제점을 갖고 있는 기존의 중성선이 없는 전원계통의 독립접지방식을 중성선이 있는 전원계통의 공통접지방식으로 개선을 하고, 정전압소자를 이용하여 낙뢰 Surge를 방호하는 효율적인 등전위 시스템 구축 방법을 제안한다.

• 한국통신학회논문지
• /
• 제29권1C호
• /
• pp.119-128
• /
• 2004

이 논문에서는 곱셈기를 사용하지 않고 덧셈기 만을 사용하여 DCT를 효과적으로 수행하는 저전력 구조를 제안하였다. 고속처리가 가능하면서도 구현 하드웨어의 크기를 최소화하기 위하여 8-point DCT를 4 cycle에 수행하는 구조를 사용하였다. 즉, 첫 번째 cycle에서 사용한 계수용 하드웨어를 두 번째부터 네 번째까지의 계산에서도 공통으로 사용할 수 있는 구조를 채택하였다. 덧셈기 만을 사용하는 기존의 구조들은 CSD(Canonic signed digit)형의 계수를 사용하여 덧셈의 수를 줄이고 있다. 본 논문에서는 Common subexpression sharing 방식을 채용함으로서 하드웨어를 더욱 감소시킬 수 있는 구조를 제안하였다. 그 결과 8-point DCT의 경우에 CSD 만을 사용한 구조와 비교하여 19.5%의 덧셈 수 감소 효과를 달성하였다.

• 농업과학연구
• /
• 제38권3호
• /
• pp.485-491
• /
• 2011

Yogurt was prepared from skim milk added with 2, 4 or 6% of green whole grain of barley, wheat, glutinous rice and common rice, respectively. Changes in pH, titratable acidity, viable cell counts and viscosity during fermentation were monitored and its sensory evaluation was also performed. The optimum level of additives such as green whole grain of barley, wheat, glutinous rice and common rice for yogurt manufacture was selected to 2%. The samples added with green whole grain of barley and wheat powders reached pH 4.5 in 12 hours. After 4 hours of fermentation, pH, the viable cell counts and viscosity in samples added with 2% green whole grain of barley, wheat, glutinous rice and common rice powders were the highest. Especially, in overall sensory evaluation using 5 parameters, the sensory scores of glutinous rice and common rice 2% yogurts were significantly high. From this experiment, the additives optimum level of glutinous rice and common rice powders was selected to be 2%.

• 한국분무공학회지
• /
• 제20권1호
• /
• pp.14-19
• /
• 2015

Recently, R&D demand for environmental friendly vehicle has rapidly increased due to its global environmental issues such as global warming, energy and economic crisis. Under this situation, the most realistic alternative way for environmental friendly vehicle is a clean diesel vehicle. The common-rail fuel injection system, as key technology of clean diesel vehicle, consists of a high pressure pump, common-rail, high pressure fuel line and electronic control injector. In common-rail high-pressure fuel injection system, high pressure wave of injection system and geometry of injector elements have a major effects on high-pressure fuel spray. Therefore, in this study, the numerical model was developed for analysis about the common-rail fuel pressure pulsation by using AMESim code. We could secure stability of common-rail high-pressure fuel injection system through optimal design of fuel line.

• 한국수산과학회지
• /
• 제39권1호
• /
• pp.42-48
• /
• 2006

Analysis of stomach content for common squid was carried out to investigate the difference in seasonal and ontogenetic feeding behavior. Totals of 1368 common squid were collected monthly off Busan from September 2004 to August, 2005. Size range of common squid was 8.5-31.8 cm mantle length (ML) during the study period. Of the 1368 stomachs examined, 599 specimens (43.8%) were empty. Stomach contents indicated that common squid was carnivore: Large portion of stomach contents consisted of fish and mollusca (mainly common squid). The stomach contents index (SCI) seemed to increase with size, though there was no statistical difference between size classes significantly. Cannibalism was minimum in size range of 15-20 cm ML, but was steadily increased with size. Cephalopods were the major prey during spring and summer when common squid were small, but fish replaced it during autumn and winter when they became large.

• 혜화의학회지
• /
• 제13권2호
• /
• pp.267-276
• /
• 2004

Objective : The purpose of this study is to compare the effect of Bee-Venom Therapy and common acupuncture therapy for the lateral epicondylitis. Methods : This study has been carried out for 24 cases of ankle sprain patients who have visited Dr. An Keun Hyeong's Oriental Clinic from april 1, 2004 to august 30, 2004. We have treated 12 cases of them by Bee-Venom therapy(group I) and the other 12 cases by common acupuncture therapy(group II). And we have compared those two group. Results : 1. There were statistical significance on the pain and grip strength with bee-venom therapy group. 2. There were statistical significance on the pain and grip strength with common acupuncture therapy group. 3. Bee-venom therapy group was more statistical significance than common acupuncture therapy group on the pain. 4. There were no statistical significance between bee-venom therapy group and common acupuncture therapy group on the grip strength.

• 대한전자공학회논문지SP
• /
• 제46권4호
• /
• pp.157-164
• /
• 2009

이 논문에서는 OFDM시스템에서 가장 큰 칩 면적을 차지하고 높은 전력을 요구하는 핵심 연산 블록인 FFT에 대하여 파이프라인 Radix-4 MDC 방식의 저면적 구조를 제안하였다. 나비연산기에서 Twiddle factor 복소 곱셈연산을 수행할 때, 기존의 곱셈기를 사용하지 않고 CSD형 계수의 공통패턴을 공유하여 덧셈의 수를 줄일 수 있는 Common sub-expression sharing 방식과 CORDIC 알고리즘을 사용하여 구현 면적을 감소시켰다. 제안구조는 Verilog-HDL을 통해 모델링하고 Synopsys로 논리합성한 결과 기존구조와 비교하여 복소곱셈부는 48.2%감소효과, 전체 FFT구조는 22.1%의 면적 감소효과를 달성하였다. 따라서 제안된 FFT구조는 다양한 크기의 FFT를 사용하는 OFDM용 시스템에 효율적으로 사용될 수 있는 구조임을 보였다.

• Journal of Ginseng Research
• /
• 제4권1호
• /
• pp.65-71
• /
• 1980

Twin-bud seedlings and four-leaflet seedlings of ginseng were found and transplanted to field and their growth characteristics were investigated. 1. Appearance frequencies of twin-bud and four-leaflet seedlings were 0.3 and 0.4 percent, respectively, in common nursery bed: and were 6.6 and 28.4 percent, respectively, in polystem line. 2. Generally, the growth of twin.bud and four-leaflet seedlings were better than those of common seedlings both in aerial part and in root. Root weights of both type seedlings exceeded the common ones by 66 and 38 percent, respectively. 3. When they became two-year-old plants, leafiet number of common plant was 11.6, and those of twin-bud and four-leaflet-seedling plants were 18.1 and 13.8, respectively. There were no inflorescence in twin-bud-seedling plant, but the ratios of in florescent Plant in four-leaflet.seedling and common plant were 44.0 and 12.5 percent, respectively. 4. In two-year-old plant, root weights of twin-bud and four-leaflet-seedling plants were heavier than those of common ones by 27 and 20 percent, respectively.

• 한국국방경영분석학회지
• /
• 제28권1호
• /
• pp.115-135
• /
• 2002

The limits of current DN(Defense networks), private and closed network, become to reality; for Example, high expense of construction and maintenance of networks, restriction of new subscribers on DN. Therefore, a network using web environment that reflect fast development of If and IS(Information Security) technology is demanded for MND. Meeting the requirement of reliable IS system and extension and improvement of DN using common network, we can reduce the expense to extend, maintain, repair DN, form the environment that makes military business cooperate better with civil company and government agency, advance implementing Defense computing and networking service for field small size units that was a exception of Defense digitalization. But it is essential to construct DN based on common network that there are security requisites; confidentiality, integrity, availability, efficiency, log, backup, restoration, that have to be realized at demanding level for IS. This thesis suggested four measurements; replacement DN with common network to resolve the requirements of building new network and improvement of performance for private DN, linkage with common network for new requirement, distribution of traffic using common network, configuration of DN using Internet and Proposed a refinement of IS management organization to treat security threat of common network flexibly, and LAN IS standard model of DN based on the web environment.

• 한국주거학회:학술대회논문집
• /
• 한국주거학회 2005년도 추계학술대회 논문집
• /
• pp.89-92
• /
• 2005

The purpose of this study was to clarify the space use pattern and the daily living activities of the elderly with dementia in the common space (living room) of nursing home. The subjects were 2 units(living room) of the nursing home. For this, researcher visited from June 20 to July 2 and collected data by observations of behavior of the elderly with dementia in common space(living room) and interviews with staff for the information about basic characteristics of the elderly with dementia and administration and operation of the facilities. The data were analyzed using the frequency and percentage. The results revealed as follows: first, the daily living activities of the elderly with dementia in common space tended to focus on self-concentration type and physical environment-interest type. Second, physical environmental -interest type. Second, physical environmental characteristics of common space affected space usage pattern of the elderly with dementia. And it was perceived like as living oriented space, social interaction space, facility space, staff oriented space. Conclusively it was suggested to plan dining space as semi-private space, day corner as semi-public space.