목포인근해역 항행 위험요소에 관한 분석

박정호,금종수,노창균,윤명오,신철호,정재용,박계각,Park Jung-Ho,Keum Jong-Soo,Noh Chang-Keun,Yun Myung-Oh,Sin Chul-Ho,Jeong Jae-Yong,Park Gyei-Kark 해양환경안전학회 2004 海洋環境安全學會誌 Vol.10 No.1

목포항 접근 항행구역은 30마일 구간의 협수로로 이루어져 있으며 항로가 여러 지점에서 교차하고 있어 교통이 혼잡한 수역이다. 특히 목포구를 제외한 외측수역은 항로가 지정되어 있지 않고 어망 및 광업권이 산재하여 선박의 안전운항을 위협하고 있다. 따라서 본 연구에서는 주변 환경과 항행 위해요소 분석, 교통실태 관측조사 및 해양사고 분석을 통한 해상교통환경평가를 실시하여 항행안전을 위한 요소를 제시한다. The navigation area approach to Mokpo port consists of narrow channels with 30mile section, and the route is crossed with many fairways. In particular, fairway routeing except Mokpogu is not assigned and there are many threatening factors against the safe operation of vessel because fishing and mining areas are designated. Therefore, this paper proposed elements for safe passage through a marine traffic environmental assessment with the analysis of surrounding environment, dangerous elements, traffic survey and marine casualty.

CNT Oil Sensor의 특성과 수율 향상 분석

박정호,이의복,주병권,Park, Jung-Ho,Lee, Eui-Bok,Lau, Vincent,Ju, Byeong-Kwon 한국전기전자재료학회 2011 전기전자재료학회논문지 Vol.24 No.8

An engine oil sensor based on multiwall carbon nanotubes was fabricated with screen printing method. Since carbon nanotubes are generally intertwined, dispersion of the carbon nanotubes in the binding agent (ethyl cellulose, a-terpineol, frit) is a key factor for large yield of engine oil sensor. By conventional dispersion method, a hand-mill method, the maximum yield was 80% at most. However, we used the hand ultrasonic, in order to increase the yield of the sensors. As a results, our engine oil sensor fabricated by the screen printing method shows excellent yield rate of 97%, when we dispersed a paste by the hand ultrasonic method.

관절 연골 손상의 병태 생리

박정호,Park, Jung-Ho 대한정형외과스포츠의학회 2005 대한정형외과스포츠의학회지 Vol.4 No.1

관절 연골 손상은 급성 손상과 만성 손상인 퇴행성 관절염으로 구분되며, 급성 손상은 연골 손상의 깊이에 따라서 미세 손상, 연골 골절, 골연골 골절의 세 종류로 구분할 수 있고 각 손상의 종류별로 서로 다른 양상의 치유 반응과 예후를 보인다. 만성 관절 연골 손상은 다양한 원인으로 인해서 발생하며 관절 연골의 전반적인 퇴행성 관절염의 형태를 보인다. 관절 연골 손상 시 초기 손상의 정도가 예후를 결정짓는데 가장 중요하고 이외에도 손상의 크기, 부위, 나이, 활동성, 비만 정도, 하지 정렬 상태등도 예후를 결정하는 중요한 요소들이다. 본 논문에서는 관절 연골 손상 시 발생하는 관절 연골 내의 병태 생리적 변화에 대하여 기술하고 비수술적인 치료 방법을 생역학적인 측면과 생물학적인 측면으로 구분하여 그 효과를 알아보고자 한다. Injury of articular cartilage can be classified into acute injury and chronic degenerative osteoarthritis Acute mechanical trauma on articular cartilage causes injuries that are divided into three distinct types based on the depth of injury: microdamage, chondral fracture, osteochondral fracture and each type has different potential of healing response and long-term prognosis. Articular cartilage undergoes degradation in response to a number of stimuli and eventually degenerative osteoarthritic changes will progress. The extent of initial injury to the articular cartilage is the most important factor affecting the long-term outcome of the healing response and other variables such as the size of lesion, site, age, activity level, obesity, limb alignment are also important factors. In this review, the pathophysiology that occurs within articular cartilage after different injuries and the effect of nonsurgical treatment mainly in physicochemical aspect and biological aspect will be discussed.

전력 트랜지스터의 특성에 미치는 다이아몬드상 카본 passivation 막의 효과

박정호,임대순,정석구,장훈,신종한,Park, Jung-Ho,Lim, Dae-Soon,Jung, Suk-Koo,Chang, Hoon,Shin, Jong-Han 대한전자공학회 1996 전자공학회논문지-A Vol.33 No.11

Because of the novel characteristics such as chemical stability, hardness, electrical resistivity and thermal conductance, diamond-like carbon (DLC) film is a suitable materials for the passivation layers. For this purpose, DLC films are synthesized under various conditions and are characterized. Adhesive stregth is excellent and increased with the increase of the hydrogen gas flow rate. The resistivity of approximately 5.3X10$^{8}{\Omega}{\cdot}cm$ is measured by automatic spreading resistance probe analysis method. The thermal conductivity of DLC films is superior to that of PSG oxide and improved by increasing the hydrogen gas flow rate. The patterning techniques of the DLC films is developed using the lift-off and RIE methods to form 5${\mu}$m line. Finally, power transistor with the DLC film as passivation layer is fabricated and analyzed. The test result shows the improsved long-term stability and higher breakdown voltage.

너비 우선 신장 트리 갱신문제를 위한 분산알고리즘

박정호,박윤용,황석형,Park, Jung-Ho,Park, Yoon-Young,Hwang, Suk-Hyung 한국정보처리학회 2000 정보처리논문지 Vol.7 No.5

너비 우선 선정 트리기 이미 구성되어 있는 비동기식 네트워크상에서 네트워크 형상이 빈힐 경우 이로인해 구성되어 있던 너비 우선 선정 트리를 갱신해야 하는 경우가 발생한다. 본 논문에서는 이러한 경우 너비 우선 신장 트리를 효율적으로 갱신하는 메시지 복잡도와 이상시간 복잡도 모두 O($p\sqrt{q}$.q.a.n')인 분산 알고리즘을 제안한다. 여기서, a는 추가 링크의 수, n'는 네트워크의 토폴로지가 변한후의 네트워크상에 존재하는 노드수를 각각 나타낸다. 그리고 p는 삭제 또는 추가 링크를 가진 이중결합요소에 속하는 전체 노드 수를 나타내며, q는 삭제 또는 추가 링크를 가진 이중 결합요소에 속하는 전체 링크수를 나타낸다. Consider the problem to updata breadth-First Spanning Tree in response to topology change of the network. The paper proposes an efficient distributed algorithm that solves such a problem after several processors and links are added and deleted. Its message complexity and its ideal-time complexity are O(p√q+q+a+n') respectively, where n' is the number fo processors in the network after the topology change, a is the number of added links, p is the total number of links in the biconnected component (of the network before the topology change) including the detected links or added links, and q is the total number of processors in the biconnected component (of the network before the topology change) including the deleted links or added links, and q is the total number of processors in the biconnected component including the deleted links or added links.

재가 항암화학요법을 받는 암환자의 가정간호중재 알고리즘 개발

박정호,김매자,홍경자,한경자,박성애,윤순녕,이인숙,조현,신계영,방경숙,Park, Jung-Ho,Kim, Mae-Ja,Hong, Kyung-Ja,Han, Kyung-Ja,Park, Sung-Ae,Yun, Soon-Nyoung,Lee, In-Sook,Cho, Hyun,Shin, Gye-Young,Bang, Kyung-Sook 한국가정간호학회 1998 가정간호학회지 Vol.5 No.-

Cancer is a leading cause of death, and the number of cancer patients is increasing in Korea. The needs for the home care of cancer patients are increasing recently, but the standardized home care protocols are not developed yet. This study was designed to develop nursing assessment -intervention algorithms for the cancer chemotherapy patients at home. These algorithms suggest guidelines when we assess the patient's condition, and find appropriate nursing interventions, so that standardization and quality control of home care can be attained. The algorithms were processed by yes-no tree. Eleven common problems of cancer chemotherapy patients were identified by the literature review and oncology nurses' experience. These were digestive dysfunction, pain, fatigue, infection, respiratory difficulties, activity intolerance, hemorrhage, sensory disorder, edema, skin problem, and mucosal problem. The algorithm needs to be validated and modified by using for the cancer chemotherapy patients at home.

이중 주파수에서 동작하는 PIFA의 설계 분석

박정호,김남,Park, Jung-Ho,Kim, Nam 한국전자파학회 2001 한국전자파학회논문지 Vol.12 No.1

본 논문은 이중 주파수에서 동작하는 소형의 PIFA(dual-PIFA)를 설계하고 각 파라미터의 변화에 따른 안테나 성능의 분석에 대한 내용을 다루었다. 안테나는 높은 주파수 성분에서 동작하는 작은 패치부분과 낮은 주파수 성분에서 동작하는 큰 패치로 구성되었다. 안테나의 크기는 실험적으로 handset 단말기에 부착하기 위하여 크기를 고정시켰다. 작은 패치의 면적, 단락 스트립 및 접은 도체판의 면적을 가변 파라미터로 설정하였고 이중의 공진 주파수(900MHz 및 1800MHz)에서 동작하게 변화시켰다. 소형 안테나는 2-layer 형태로 구형되었고 두 주파수에서의 전계강도 및 방상패턴을 알아보았다. 안테나의 각 피라미터의 변화에 따른 특성을 해석하기 위해 FDTD 기법을 이용하였다. In this thesis, characteristics of compact PIFA are analyzed for operation in dual frequencies (dual-PIFA) as variety of parameters. The antenna is composed of two patches. These are operated in high frequency and low frequency. The dimension of experiential antenna is fixed for attaching at the handset. The variable parameters are dimension of small patch, length of shorting strip and dimension of folded conductor plate, the frequencies are 900 MHz and 1800 MHz. The compact antenna is implemented with 2-layer type, electric field intensities and radiation patterns are simulated. In order to analyze characteristics of a performance as variety of parameters, FDTD method is used.

VR콘텐츠의 인지에 미치는 시지각 요인이 실재감에 미치는 영향에 관한 연구

박정호,최은영,Park, Jung-ho,Choi, Eun-young 한국정보통신학회 2018 한국정보통신학회논문지 Vol.22 No.7

최근 HMD 장비의 발전 및 보급 확대와 함께 가상현실 콘텐츠의 개발도 늘어나고 있으나 개발되는 대부분의 가상 현실 콘텐츠는 사용자의 인지 능력 차이를 참작하지 않고 개발되고 있고, 가상현실 콘텐츠를 이용하는 이용자에 따라 느끼는 몰입감이나 현실감이 크게 차이 나고 있다. 본 연구에서는 문헌연구를 토대로 가상현실기반 콘텐츠 제작시 내용 인지에 미치는 시각적 요인들을 도출해 내고, 실험을 통해 이러한 요인들이 콘텐츠 내용 인지에 미치는 영향과 실재감과의 상관 관계에 관하여 연구를 진행하였다. 연구 결과, 시각요인 중 색상지각과 공간지각요인은 콘텐츠 인식 및 실재감에 유의미한 영향을 미치는 것으로 나타났으며, 운동지각 요인은 인지부조화로 멀미를 일으키고 콘텐츠의 정확한 인식에도 부정적 영향을 미친다는 것을 알 수 있었다. 또한 VR 콘텐츠의 인지는 실재감에 크게 영향을 미치는 것을 알 수 있었다. As a result of the recent development and dissemination of HMD equipment, there has been an increase in the development of virtual reality contents. However most of these developments do not take differences of users' cognitive abilities and users' ability to immerse in and connect to these contents into consideration. In this study, we investigated the effects of visual factors of contents by conducting literature reviews, and conducted research on the correlation between visual factors and Virtual reality presence. While color and spatial factors had significant positive effects on content recognition and sense of reality, motion perception factors caused cognitive dissonance, which negatively effects the accurate recognition of contents. We were able to find that accurate recognition of virtual reality contents have a great impact on users' sense of reality.

지역사회 중심 가정간호사업 운영연구(가정간호사업 운영을 위한 정보전달체계 개발Ⅱ)

박정호,김매자,홍경자,한경자,박성애,윤순녕,이인숙,조현,방경숙,Park, Jung-Ho,Kim, Mae-Ja,Hong, Kyung-Ja,Han, Kyung-Ja,Park, Sung-Ae,Yun, Soon-Nyoung,Lee, In-Sook,Cho, Hyun,Bang, Kyung-Sook 한국가정간호학회 1998 가정간호학회지 Vol.5 No.-

The purpose of this study was to develop the framework of community-based home care nursing delivery system, and to examine the validity of it. For these, home care nursing study team of College of Nursing, Seoul National University has studied home care nursing system since September, 1996, and has operated home care center since August, 1997. This study has been supported by the Korean Sience Foundation. We organized Committee of rules, and Clinical specialist consultant group for more efficient running of the home care center. In nursing station, research assistant controlled general work, and 5 home care nurses were hired for home visiting. We developed the Standards for operations, that included criteria for clients, central supply system of nursing materials, central management of nursing care cost, advertisement, patient referral system, and so forth. In our center, 108 patients enrolled, and neurologic disorders including cerebrovascular accident, and cancer were the most prevailing diseases. We tried to overcome the limitations of hopital -based home care, and to provide more accessible, efficient, safe, and stable home care nursing. Therefore, we were referred clients from patients and families, public health care center, industries, as well as from hospitals. Meanwhile, we developed home care recording system and assessment-intervention algorithm for various diseases for quality control and standardization. Also, we did continuing education, and tried to detect problems and to find solutions by regular meeting between the committee of rules and home care nurses. As the results of this study, several limitations of operation were found. First, it was difficult to manage and communicate with the doctor in the emergency situation, Second, we spent too much time for trasnsportation, because only five nurses covered all areas of Seoul and nearby cities. Third, preparation for special care of home care nurses were lacked. Forth, criteria for termination of care and frequency of home visit were ambiguous. Fifth, some difficulties were found in retrospective payment system. And finally, interconnection with home care machinery company were needed. Strategies for solving these problems were suggested.

강원도 방태천 수서곤충 군집의 생태학적 특성

박정호,조규송 ( Jung Ho Park,Kyu Song Cho ) 한국하천호수학회 1995 생태와 환경 Vol.28 No.3

This study was conducted to investigate the community structure of aquatic insects in Pangtae Creek(or Jindong stream) located at the upper basin of the North Han River from April 1992 to September 1993. Aquatic insects were classified into 151 species within 40 families and 7 orders. Abundance of aquatic insects at each sites were Trichoptera(41.1%), Ephemeroptera(36.9%), Diptera(15.6%), and Plecoptera(4,72%). The fauna and flora of the Pangtae Creek are well preserved and forest stands were luxuriant along side. Also variable range of water temperature was narrow and water temperature during midsummer at the Pangtae Creek was no zooming. Confirmed pH was neutral value from 6.0 to 6.9. The dissolved oxygen revealed high value about 15ppm. Therefore, Current velocity, water temperature, pH, dissolved oxygen, and substrate were important factors determining species composition and abundances. Dominance indices ranged between 0.15∼0.68 and 0.15∼0.46 in 1992 and 1993, respectively. Species diversity indices ranged from 1.48 to 3.67 in 1992 and from 2.20 to 3.45 in 1993. Diversity, richness, and eveness indices in these areas were fairly higher than those in other areas investigated previously. This result suggest that the Pangtae Creek could be characterized as clear water stream; Oligosaprobic.