변형된 트랜스듀서 및 FM을 이용한 이식형 인공중이 시스템의 전력효율 개선

윤영호,원철호,송병섭,정영숙,김명남,박세광,이상흔,조진호 경북대학교 전자기술연구소 1997 電子技術硏究誌 Vol.18 No.2

In design of implantable middle ear system, it is necessary that the system has a high power-transfer efficiency because die internal circuit of the system has no power source. The FM transmission method transfers the signal power more efficiently than AM method because AM signal has large carrier component which act as the loss. Therefore, an implantable middle ear system using FM transmission and receiving method is proposed. And the new shape of vibrating transducer which vibrate more efficiently than the conventional type was designed. This tranducer is consisted of coil and small T-type cylindrical permanent magnet. The differences between conventional methods and proposed methods are investigated and compared through quantitive analysis. The advantages of proposed methods are proved by experiments.

Dieulafoy 양 병변에 의한 십이지장게실 출혈 1 예

김상현,김경환,이동현,송철수,정노원,박상제,김은규,하홍성,나일환,황윤이,성은영,최익수,신영기 대한소화기내시경학회 2001 Clinical Endoscopy Vol.23 No.1

Duodenal diverticula are first reported by Chomel in 1710. Duodenal diverticula are relatively common in adults with a prevalence of 23% in SRCP. The most duodenal diverticulum is asymptomatic. Complications such as obstruction, cholangitis, blliary stones, ulceration, perforation and hemorrhage can occur in approximately 10%. However, relatively few cases of bleeding from a duodenal diverticulum have been reported. The cause of bleeding from a duodenal diverticulum is uncertain and various suspected etiologies were suggested, such as ectopic gastric mucosa, stasis-induced ulceration, erosion into major vessels, aortoenteric fistuias, intradiverticujar polyp, aspirin-induced erosion. We report a case of a bleeding duodenal diverticulum by a Dieulafoy-like lesion and suggest this 1esion as one of posslble causes of blee4ng in duodenal diverticulum.

산업보건 및 환경분야에 대한 활동기준원가계산 및 관리의 응용

백남원,박두용,마이클티브랜트,스티븐피르빈 한국산업위생학회 1996 한국산업보건학회지 Vol.6 No.1

During the 1990s the workplace has grown more complex and business competition has increased world-wide. All organizations, whether for-profit or non-profit have been forced to respond to market changes. More advanced information and technology, greater product diversity, shorter product life cycles, increased quality requirements, more regulation oversight, decreasing productivity, more competitors, and increasing overhead costs have motivated organizations to focus on ways to deliver products cheaper, better, and faster. Many organizations are searching for ways to reduce costs through downsizing, reengineering business processes, implementing quality management, outsourcing, and improving cost management. Support departments that provide services internal to an organization such as human resources, legal, and environmental, safety, and health (ES&H) are often the first organization targeted for cost reduction and cost control initiatives because these functions are part of a rapidly increasing overhead cost. Recently, ES&H functions are increasingly being integrated into the business of business to contribute value to organization beyond mere compliance with ES&H regulations. The discussions and development of the ISO compatible Environmental Management Standards or Occupational Safety and Health Management Standards is another impetus to integrate ES&H function into the business of business. Thus, ES&H professional need new skills to analyze the cost of their function and communicate the value of the products and services they provide. In recent years, the need for and the importance developing cost management and business skills by ES&H professionals have been emphasized in the literature. Communicating with decision makers in terms of cost and value to the organization, and by using business language and business arguments is the first step toward effectively integrating ES&H activities into the business of business. Activity-based casting (ABC) is a cost management method that measures the cost of a product or service loosed on the actual use of resources by activities, and based on the actual amount of activities used to produce a product or service. ABC is recommended as a tool for managers of ES&H organizations to determine the cost of developing and providing ES&H products within a for-profit firm or non-profit agency. This paper discusses the trend of integration of ES&H functions into the mainstream of business activities within an organization. The general principles of traditional cost accounting are presented as a bases for understanding why and how ABC will provide more accurate estimates of cast. The principles and concepts of ABS are presented as a tool for determining mire accurately the true cost of ES&H products and services.

초음파법에 의한 중탄소강에서의 시멘타이트 구상화율 평가

변재원,김준수,박은수,권소인 대한금속재료학회(대한금속학회) 2001 대한금속·재료학회지 Vol.39 No.5

An attempt was made to evaluate the change of microstructures and mechanical properties with increasing spheroidizing time in a cold heading steel, containing proeutectoid ferrite and pearlite, by the ultrasonic attenuation and velocity measurements. Ultrasonic velocity was not sensitive to the microstructural changes, resulting from spheroidization heat treatment to produce various mean aspect ratio, mean equivalent size and number of cementite particles per unit area and ferrite grain size. Ultrasonic attenuation was initially decreased and then increased with increasing spheroidizing time. A good correlation between ultrasonic attenuation coefficient and mechanical properties such as hardness and tensile strength was found.

신장이식에 대한 마취경험

김종래,박광원,문영삼,정인석,손영은 대한마취과학회 1982 Korean Journal of Anesthesiology Vol.15 No.1

성인에서 반복적인 위장관출혈로 발현한 공장 거대 중복성 낭종

김영호,이경수,이상수,문원,강태욱,최규완,박동일,도재혁,백승운,이풍렬,이종철,김재준,류민규 대한내과학회 2001 대한내과학회지 Vol.61 No.3

Duplication of the alimentary tract is an unusual congenital anomaly which may occur at any level, from the oral cavity to the rectum. Jejunal duplication cyst is quite rare and most of them are presented in infancy with the symptoms of abdominal mass, obstruction, hemorrhage and perforation. But some cases has not been diagnosed till adult if duplication cyst was too small enough to cause symptoms. We report a case of a 28-year-old woman who presented with recurrent gastrointestinal hemorrhage as a result of an ulceration without ectopic mucosa in jejunal duplication cyst and was successfully treated with surgery.(Korean J Med 61:264-269, 2001)

서구 공원 녹지 배치 계획 이론의 초기 발전 과정과 특성

박구원 ( Koo Won Park ) 한국녹지환경디자인학회 2006 녹지환경학회지 Vol.2 No.2

In America and Europe from the latter part of the 19th century to the beginning of the 20th century, the planning ideologies of park system and greenbelts were made and these planning ideologies are called Green Network System. They are different in terms of the purpose, type and method, but they have common characteristics of encouraging order and amenity in cities based on the consecutive connection of green space, and of coping with the problems happening in cities. Just as the park system was made, centering around new America and greenbelts were developed to meet with the problems happening in large cities, the structural arrangement and the roles of greens should be different. However, this connection system of greens was oriented in the circumstances of America and Europe at that time so it has not been confirmed what sizes of cities it would be useful for. On the other hand, separately from the Green Network System, the theory of park arrangement is being developed. It intends to cope with deterioration of the living environment caused by overcrowded cities and with increase in the demands of public parks. It is based on the neighborhood unit and the science of human settlement. In addition, the theory of park arrangement is based on the effects of greens in use, rather than, in decoration so it encourages dispersion and hierarchical system of parks, having the human settlement as base. Consequently, the theory of park arrangement is influenced by the characteristics and the type of households, and it has a required area and planning unit. However, this theory has the right for walking and human scale as the basic unit so for the large parks that are beyond the human scale, the planning criteria are not clear. The theory of park arrangement, which is based on the neighborhood unit, may be useful for the cities with tens of thousands of residents, but it is partially applied for the cities with 500,000~1,000,000 residents. And further, in organizing the green system for the whole city, the theory of park arrangement can be ignored. As seen in the above, the existing arrangement theory has some problems: it is just for partial application; and it is not suitable for the size and the growing speed of cities. The greens in cities should be operated as the comprehensive system, but greenbelts and park arrangement have been studied separately so far. That`s why it is necessary to review again the existing arrangement theory.

DJ-1/park7 modulates vasorelaxation and blood pressure via epigenetic modification of endothelial nitric oxide synthase

Won, Kyung Jong,Jung, Seung Hyo,Jung, Soo Hyun,Lee, Kang Pa,Lee, Hwan Myung,Lee, Dong-Youb,Park, Eun-Seok,Kim, Junghwan,Kim, Bokyung Oxford University Press 2014 Cardiovascular research Vol.101 No.3

<P><B>Aims</B></P><P>DJ-1/park7, a multifunctional protein, may play essential roles in the vascular system. However, the function of DJ-1/park7 in vascular contractility has remained unclear. The present study was designed to investigate whether the DJ-1/park7 is involved in the regulation of vascular contractility and systolic blood pressure (SBP).</P><P><B>Methods and results</B></P><P>Norepinephrine (NE) elevated contraction in endothelium-intact vessels in a dose-dependent manner, to a greater extent in DJ-1/park7 knockout (DJ-1/park7<SUP>−/−</SUP>) mice than in wild-type (DJ-1/park7<SUP>+/+</SUP>) mice. Acetylcholine inhibited NE-evoked contraction in endothelium-intact vessels, and this was markedly impaired in DJ-1/park7<SUP>−/−</SUP> mice compared with DJ-1/park7<SUP>+/+</SUP>. Nitric oxide (NO) production (82.1 ± 2.8% of control) and endothelial NO synthase (eNOS) expression (61.7 ± 8.9%) were lower, but H<SUB>2</SUB>O<SUB>2</SUB> production (126.4 ± 8.6%) was higher, in endothelial cells from DJ-1/park7<SUP>−/−</SUP> mice than in those from DJ-1/park7<SUP>+/+</SUP> controls; these effects were reversed by DJ-1/park7-overexpressing endothelial cells from DJ-1/park7<SUP>−/−</SUP> mice. Histone deacetylase (HDAC)-1 recruitment and H3 histone acetylation at the eNOS promoter were elevated and diminished, respectively, in DJ-1/park7<SUP>−/−</SUP> mice compared with DJ-1/park7<SUP>+/+</SUP> controls. Moreover, SBP was significantly elevated in DJ-1/park7<SUP>−/−</SUP> mice compared with DJ-1/park7<SUP>+/+</SUP> controls, but this elevation was inhibited in mice treated with valproic acid, an inhibitor of Class I HDACs including HDAC-1.</P><P><B>Conclusion</B></P><P>These results demonstrate that DJ-1/park7 protein may be implicated in the regulation of vascular contractility and blood pressure, probably by the impairment of NO production through H<SUB>2</SUB>O<SUB>2</SUB>-mediated epigenetic inhibition of eNOS expression.</P>

The Analysis on the Value of Yongsan National Park and its Economic Effect

Chang, In-Seok,Cho, Young-Tae,Lee, Mi-Hong,Park, Shin-Won Land and Housing Institute 2011 LHI journal of land, housing, and urban affairs Vol.2 No.4

This study estimated economic value and benefits of Yongsan National Park, which will be constructed by financial investment of the government and objectively estimated the real value of it by understanding the value of the park from a user's view of the park. For this, the value of Yongsan National Park is divided into using value such as carbon reduction and the function of relieving urban heat island as an environmental material and non-using value based on willingness to pay of the public according to the construction of the park. As a result of the analysis, it was found out that the using value of Yongsan National Park would reach 130 million won up to maximum level of 450 million won per year, and the non-using value was analyzed to be worthy of 2,344 won per capita every month. Besides, economic ripple effect that can be expected in the process of the park construction project was analyzed to be a national policy that creates effect on production inducement of 2.6 trillion won and value added of 809.6 billion won and new jobs for 25,620 persons. Considering the value of Yongsan National Park and the effect of the project based on the result of this study, it was found that it could sufficiently secure the validity of implementing the project compared to the financial investment by the government. Therefore, it must be emphasized that diffusion strategy is necessary for national understanding and for a nation to make it understood its appropriateness widely in respect to the construction of Yongsan National Park for the successful construction of Yongsan National Park and to raise its using value in the future.

도시공원 바닥포장의 디자인 개선에 관한 연구

김신원(Shin Won Kim),박태석(Tae Seok Park),노희곤(Hee Gon Noh) 한국디자인문화학회 2009 한국디자인문화학회지 Vol.15 No.3

도시가 발전하면서 사람들은 삶에 있어 정신적, 문화적 욕구의 충족에 더 많은 관심을 가지게 된다. 도시환경을 개선하고자 하는 요구는 과거에 비해 더욱 심화되었다. 조경 분야에서 외부 환경의 물리적 요소는 이러한 요구에 부응하는데 있어 중요한 역할을 한다. 일반적으로 외부 공간을 형성하는 주요한 골격은 토지, 식물, 정형적 요소 등이다. 도시생활에서 이용자가 향유하는 공간으로는 주로 자연이 우세한 자연적 공간, 인공적 요소가 가미된 자연적 공간, 인공성이 주가 되는 자연적 공간 등이 있다. 이러한 공간은 사람들이 자연과 접하며 휴식하고 만나고 담소를 나누는 장소가 된다. 외부 공간은 실용적인 기능뿐만이 아니라 시각적인 아름다움도 지녀야 한다. 최근 들어 조경디자인 분야에서 공간을 구성하는데 질 높은 다양한 재료들이 활용되고 있다. 그런데 도시공원을 보면 특히 바닥포장과 관련해서는 개선해야 할 부분이 많이 있다. 시대의 흐름 및 도시민의 요구에 부응하여 빠른 시일 내에 도시공원 바닥포장 디자인의 개선이 이루어져야 하고 재료 선정에 변화가 있어야 한다. 도시공원의 바닥포장은 이용자의 쾌적성, 안전성, 접근성 등에 영향을 준다. 도시공원 바닥포장의 디자인 개선에 관한 본 연구는 쾌적한 도시공원을 위해 필요로 하는 바닥포장의 조성에 대한 연구이다. 연구방법은 선유도, 서울숲, 월드컵공원의 현황을 조사하여 바닥포장과 관련된 문제의 요인과 유형을 분석하고, 문제를 해결하고 공간의 질을 높이기 위해 바닥포장 개선 방안을 연구하여 설계안을 제시하였다. 도시공원 바닥포장의 품질 개선을 도모하며, 향후 도시공원 바닥포장 디자인의 수준을 제고하는데 유용하게 활용될 수 있는 자료를 제공하는 것에 본 연구의 의의와 목적이 있다. 연구를 수행하기 위하여 도시공원 바닥포장에 대해 현황 조사 및 분석이 이루어졌다. 또한 연구 결과를 토대로 하여 바람직한 바닥포장 재료 및 색채를 선정하고 적절한 바닥포장 디자인의 변경안을 제시하였다. 도시공원 바닥포장의 디자인 변경이 요구되는 현황을 조사하고 그 원인을 분석하여 개선안을 제시한 본 연구의 내용은 이용자가 만족할 수 있는 쾌적하고 아름다운 도시공간을 조성하는데 도움이 될 것이다. As cities continue to develop, people desire to fulfil their mental and cultural desires. So the demand for improving the city environment is more palatable than ever. The `outer-space` physical element in landscape architecture has its own role to play in satisfying this demand. The general frame of `outer-space` is mostly based on land, plants, and formative factors, regardless of size, fixedness, or location. The space for leisure use is divided into three parts. The first is `natural space` including mountains, rivers, and seas. The second is `natural space with added artificial elements` such as parks and terraced land on the rivers, which are created to protect the natural space from probable damage and to make full use of the space as rest areas. The third is `purposeful space` such as squares and parks with environmental and human facilities. They are the spaces made for the purposes of resting, recreation, and/or indicating the border of inside or outside of buildings. The ideal function of the elements of outer space is not only providing beauty, but also playing an important role in determining the atmosphere of limited space like parks. With the rapidly changing social norm, the design period tends to get shorter and shorter, and the recent trend is to use materials with high quality and diversity. However, the design of pavement in city parks has not been remodeled. Great improvements to facility maintenance, repair work, and plant preservation in parks have been made, but the issue of remodelling pavement has hardly been considered. Given that the type of pavement can give comfort or stress to the people visiting parks, it plays an important role in park design. This study is to design and create surface pavement for improving the outdoor spatial quality of city parks. The specific goals and objectives of this study are: to develop design criteria for creating user-responsive outdoor space, based upon the research findings drawn from site survey and analysis focusing on the surface pavement in city parks; and to make specific design recommendations, if there is room for improvement, for improving the outdoor spatial quality of city parks. This research study focused on surface pavement in 3 city parks (Seonyu Island, Seoul Forest, World Cup Park) such as overall image, arrangement of pavement, design and pattern, material, and color. With this background, and with survey and analysis, this study will suggest design changes to pavement in order to make the public space of the city park more satisfying and comfortable to its users. Findings obtained from this research study could be used in the designing of future projects in order to get a better understanding of the needs of users. The changes in order to meet users` needs and to improve the spatial quality of the city parks should be implemented.