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.

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.

프로그래밍 학습동기 증진을 위한 스토리텔링기반 교육 모형에 관한 연구

박정호,구정모,송정범,배영권,안성훈,이태욱,Park, Jung-Ho,Gu, Jung-Mo,Song, Jeong-Beom,Bae, Young-Kwon,An, Sung-Hun,Lee, Tae-Wuk 한국정보교육학회 2009 정보교육학회논문지 Vol.13 No.1

본 연구에서는 초등학생의 프로그래밍 학습을 위해 스토리텔링기반 프로그래밍 교육 모형을 개발 현장에 적용하여 학습동기와 학업성취도 증진을 모색하였다. 학습동기에 대한 사후 검사 결과, 두 집단은 통계적으로 유의미한 차이를 보였으며 학업성취도 대한 사후 검사 결과, 두 집단 모두 사전검사에 비해 평균점수가 향상되었는데 특히, 실험집단의 평균이 비교집단의 평균보다 높게 나타났으며, 통계적으로 유의미한 차이를 보이고 있다. 본 연구의 결과 스토리텔링 전략이 프로그래밍의 학습동기 증진과 학업성취도의 향상에 직접적인 관련이 있다는 것을 밝힐 수 있었다. This research pursued improvement of learning motives and accomplishment of study by developing storytelling based education model and applying them to field for elementary students study of programming. As a result of inspection on study motives, two groups showed statistically significant different with experiment group showing higher average than comparison group. As a result of inspection on study accomplishment, both groups showed improved average points over previous inspection, and particularly experiment group showed higher average than that of comparison group The results of this research showed that storytelling strategy has direct relation with improvement of programming study motives and study accomplishment

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.

활성 영역에 따른 웨이브렛 영상 부호화

박정호,김대중,곽훈성,Park, Jeong-Ho,Kim, Dae-Jung,Gwak, Hun-Seong 대한전자공학회 2002 電子工學會論文誌-SP (Signal processing) Vol.39 No.2

본 논문에서는 공간 영상의 특성과 웨이브렛 변환 사이의 상관 관계를 이용한 새로운 영상 부호화 기법을 제안한다. 제안한 방법은 먼저 윈 영상을 2ⁿ×2ⁿ 크기의 블록으로 분할 한 후, 각 블록의 표준편차에 따라 변화가 없는 활성 영역(LAR)과 변화가 큰 활성 영역(HAR)으로 분류한다. 공간영역에서 저주파수 영역은 웨이브렛 변환 대역에서 zero region으로 나타나며, 영상의 복원에 큰 영향을 미치지 않는 특성을 가지고 있다. 반면, 고주파수 영역은 영상의 복원에 있어 큰 영향을 미치는 중요계수와 관련이 있다. 본 논문에서는 이러한 특성들을 이용하여 낮-은 비트율에서도 높은 압축률을 얻을 수 있는 부호화 기법을 제안한다. 영상 부호화를 위해 저주파수 영역은 본 논문에서 제안한 LAR 부호화 기법을 적용하고 고주파수 영역의 효율적인 부호화를 위해 계층적 트리에서 비트플레인 부호화 방식과 유사한 형태의 방법을 제안하고 이를 적용하였다. 실험결과 제안한 부호화 기법은 EZW 및 SPIHT 방식에 비해 복원화질 및 전송 비트율 모두 좋은 결과를 나타냄을 확인하였으며 점진적 전송이 요구되는 분야에 적용될 수 있을 것으로 예상한다. In this paper, we propose a new method for image coding which efficiently use the relationship between the properties of spatial image and its wavelet transform. Firstly, an original image is decomposed into several layers by the wavelet transform, and simultaneously decomposed into 2$^n$$\times$2$^n$blocks. Each block is classified into two regions according to their standard deviation, i.e., low activity region(LAR) and high activity region(HAR). The region with low frequency in spatial domain does not only appears as zero regions in wavelet frequency domain like HL, LH, and HH but also gives little influence to the quality of reconstructed image. The other side, the high frequency regions are related to significant coefficients which gives much influence to image reconstruction. In this paper, we propose a image coding method to obtain high compression rate at low bit rate by these properties. The LAR region is encoded by LAR coding method which is proposed in this paper, the HAR by a technique similar to bitplane coding in hierarchical tree. Simulation results show that th,$\boxUl$ proposed coding method has better performance than EZW and SPIHT schemes in terms of image quality and transmitted bit rates, can be successfully applied to the application areas that require of progressive transmission.

컴퓨터과학 도입을 위한 초등컴퓨터 교육과정 연구

박정호,오필우,이태욱,Park, Jung-Ho,Oh, Pill-Woo,Lee, Tae-Wuk 한국정보교육학회 2006 정보교육학회논문지 Vol.10 No.1

Computer education currently executed at elementary schools showed problems of system of education curriculum, repetition, and lack of consistent system as a result of analyzing index for information and communication technology, education curriculum, and related literatures, and most of the education contents have difficulty to nurture logic thinking and problem-solving ability since they are composed mainly of software function learning. Concerning this issue, this study suggests an innovated computer education curriculum with reinforced information ethics field with computer principle, algorithm, and programming, in other words, a corrected and supplemented version of former content system based on computer science guidance cases of ACM education curriculum model of USA, computer education curriculum of state Tennessee, and information technology education curriculum of Great Britain judging that introduction of computer science factors are desperate to improve computer education curriculum in elementary schools.

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.

종합병원의 간호인력 수요

박정호,Park, Jung-Ho 한국국방경영분석학회 1976 한국국방경영분석학회지 Vol.2 No.2