한국인의 운전 자세에서 발생하는 Sagging 현상에 관한 연구

정성욱,오영택,박성준,정의승 대한인간공학회 2007 대한인간공학회 학술대회논문집 Vol.- No.-

차량 설계에 있어서 운전 자세에 관한 연구는 매우 중요한 이슈로 부각되어 왔다. 최근에는 단순히 최적 운전 자세의 각도에 대한 연구뿐만 아니라, 가상의 3차원 인체 모델에 대한 연구가 활발히 진행되고 있다. 그러나 3차원 인체 모델을 통한 운전 자세 구현 시 가장 큰 문제점 중의 하나는 자세 변화에 따른 인체 사이즈의 변화를 정확히 반영하기 어렵다는 것이다. 실제로 등을 곧게 펴고 앉을 경우(Erect)보다, 편안한 자세로 운전자세를 취할 경우 등이 약간 휘어지고, 몸통의 길이가 축소되는 현상을 가상의 인체 모델에서 구현하기 힘들다는 점이다. 따라서 본 연구에서는 동일한 운전자에 대하여 곧게 앉을 경우와, 운전 자세를 취할 경우 발생하는 상체의 길이의 차이를 Sagging 현상이라 정의하고 그 정도를 파악하고자 한다. 또한, 신체적 특성(키) 및 차종의 특성(시트각, 시트 높이)에 따라 Sagging 현상의 차이를 체계적으로 분석해 보고자 한다.

간경변의 초음파 소견에 대한분석

정성욱 대한영상의학회 1988 대한영상의학회지 Vol.24 No.5

The association of liver cirrhosis with high amplitude echoes is well recognized. In Korea despite the common occurrence of liver cirrhosis littel has been written regarding its ultrasonographic features. Retrospective evaluation of abdominal sonograms in 122 patients with liver cirrhosis was made using Weill's classification. The resultw were as followings: 1. 122 cases consist of 23 cases with Type 1,37 cases with Type II, 33 cases with type IIIa 28 cases with Type IIIb and 1 cases with Type. IV. 2. Neither clinical finding nor laboratory data discriminates remarkable difference between each type. 3. Liver size is not in direct proportion to ultrasonographic type although hepatic retraction was more frequent in type III IV than in Type I and II. 4. Ancillary findings such as splenomegaly portal hypertension and ascites are seen in Type I, II as frequently as in type III, IV. Therefore these different patterns are considered to be related to morphological types rather than phases. 5. Area of diverse echogenicity was revealed as malignant transformation in cirrhotic liver by RI scam by cold area.

담낭축농증의 초음파소견

정성욱 대한영상의학회 1986 대한영상의학회지 Vol.22 No.3

Surgeons have been dependent mainly on the clinical findings in the diagnosis of the empyema of gallbladder requiring a emergent surgical intervention. Ultrasonographic findings of empyema of gallbladder are similar to those of acute cholecystitis, but several finding are more frequently seen in empyema than in acute choecystitis. We reviewed the clinical and ultrasonographic pictures in 15 cases of surgically proven empyema of gallbadder. The results were as follows : 1. Empyema of GB shows relatively high frequency in male and elderly person, compared with acute cholecystitis. 2. Right upper abdminal pain with tendenrness and leukocytosis are constant findings in empyema. 3. Ultrasonographic findings : (1) GB is distended in 80%. (2) GB wallis thickened and ill defined in 80%. (3) internal echo is seen in 93.3% -diffuse(53.3%), localized (20%), or layered(20%). (4) Gallstones are located i CBD causing dilatation proximally.

한 · 일 영화 타이틀의 네이밍에 관한 대조연구

정성욱 중앙대학교 일본연구소 2015 日本 硏究 Vol.0 No.38

Language changes by the flow of time and culture enjoyed. The movie is the genre that can see the appearance changed from the first definition of society. This paper analyzed the title of Japanese movie and Korean movie by period, ranking, use of characters, form and syllables. Even if it is the work of the same times, there is a case that ranking is different. When it comes to the mark, it was used 359times in Korean and 409times in Japan. ‘Kanji’ was used more for a title in Korea, and ‘Katakana’ was used for a title in Japan. The frequency of the mark has increased by time in both Korea and Japan. As for a from, one form occupied more than half in Korea by between ranking and period. In Japan, one form increased by ranking. But, two more forms have increased by period. When it comes to a syllable, in Korea, the movie which of the syllable of the title is short tended to have high order. The number of syllables of the title of the movie in Japan was more than that of South Korea. A syllable was short, as for the title of the movie which was high in ranking. On the other hand, the number of syllables of the title of the movie which had low ranking was not constant. A title of 3 syllables is used most in Korean and a title of 7 syllables is used most in Japan by a period. The title of the movie is a thing to express the contents of the movie. To make it easily to remember and catch eye, the change was given to the use of characters of the title and the number of syllables. In conclusion, for success of film, it is better to use about four syllable for the title in Korea, and about ten syllables in Japan. Even though the form of titles have changed and would change by time, it is difficult to write the overall flow of movie only based on information by this investigation. But, the research about the use of characters and syllables of the title seems to be helpful for future’s research task.

JAUS표준 기반의 모바일 로봇 원격제어 시스템 구현에 관한 연구

정성욱,조상현,김태효,박영석,Jung, Sung-Uk,Cho, Sang-Hyun,Kim, Tae-Hyu,Park, Young-Seak 한국융합신호처리학회 2008 융합신호처리학회 논문지 (JISPS) Vol.9 No.3

최근 국내외에서 무인 자동차용 로봇 개발에 관한 많은 관심과 개발 경쟁이 한층 더해가고 있다. 그러나 무인 자동차용 로봇을 효과적으로 제어하기 위한 표준화된 아키텍쳐의 부재로 개발 기간의 장기화 되고, 다른 무인 자동차용 로봇과 호환성이 저하되는 어려움이 많았다. 따라서 본 논문에서는 무인 자동차용 로봇 표준 아키텍쳐인 JAUS 기반으로 모바일 로봇을 원격 제어하는 시스템을 구현하였다. 구현된 모바일 로봇은 무선 LAN UDP/IP 프로토콜 기반으로 JAUS 명령 메시지를 사용해서 원격제어시스템과 통신한다. 본 연구의 유효성은 구현 로봇의 주행 및 장애물인식 성능에 대한 실험적 결과를 통해 보여진다. Recently, lots of interest and competition in developments related to the autonomous-vehicle robot are being further increased. However, the absence of the standard architectures for effectively controlling the autonomous-vehicle robot led to many difficulties such as the long duration of development and the uncompatibility with other autonomous-vehicle robots. Accordingly, we implemented a mobile autonomous-vehicle robot system based on JAUS standard architecture. The mobile robot communicates with the remote-control system by using wireless LAN UDP/IP JAUS command massages. Its effectiveness is showed through the experimental results related to the navigation of implemented robot.

CAT-I GBAS 한반도 전리층 위협모델 구축을 위한 알고리즘 설계

정성욱,방유진,이지윤 한국항공우주학회 2011 한국항공우주학회 학술발표회 논문집 Vol.2011 No.4

GBAS(Ground Augmentation System) 시스템은 항공기의 정밀 공항 접근과 자동 착륙을 위해 개발된 시스템이다. 시스템의 운영중에 극심한 전리층 폭풍이 발생하였을 경우 지상국이 이를 감지하지 못하면 사용자의 안전성에 큰 위협을 줄 수 있다. 시스템의 무결성을 보장하기 위해서는 전리층 위협 감지를 위한 모니터링 기술이 개발되어야 하며 이에 앞서 전리층 위협모델이 구축되어야 한다. 이 연구에서는 기존의 미국 LAAS(Local Area Augmentation System)의 CAT-I 전리층 위협모델을 분석하여 한반도 전리층 위협모델 구축 알고리즘을 설계하였다. 구축 과정은 크게 데이터 획득, 전리층 지연오차 추정 및 전리층 경사도 검증의 세 단계로 구성되며, 전리층 지연오차 추정의 경우 크게 전처리 과정과 주파수간 바이어스 추정 모듈로 나뉘며 높은 추정 정밀도가 요구된다. 또한 전리층 경사도 검증 과정은 수신기 고장과 데이터의 연속성을 판단하는 부분으로 구성되며, 이 검증 과정을 통과한 전리층 경사도가 최종전리층 위협모델에 포함될 데이터로 인정된다. Ground-Based Augmentation Systems (GBAS), such as the U.S. Local Area Augmentation System (LAAS), support aircraft precision approach and landing by providing differential corrections and integrity information to aviation users. One of the most challenging hazards to mitigate is extreme ionospheric spatial gradients that may occur during severe ionospheric storms. In this work, we design an algorithm to develop a Korean ionospheric anomaly threat model for GBAS CAT-I operations. This algorithm is divided into three steps, Global Positioning System (GPS) data gathering, precise ionospheric delay estimation, and validation of anomalous ionospheric gradients. The procedure for estimating ionospheric delays requires both pre-processing and inter-frequency bias (IFB) estimation algorithms. We eliminate large ionospheric gradients caused by receiver faults or post-processing errors from anomaly candidates by manual validation.

반도체 산업의 특성을 고려한 공급사슬 모형에 대한 생산 및 분배정책의 비교

정성욱,이병진,이영훈 한국경영과학회 2004 韓國經營科學會誌 Vol.29 No.3

Semiconductor industry is the ace whose supply chain network is distributed all over the world. And it has different characteristics with other manufacturing industries as reentrancy, binning, substitution. In this paper, we suggest supply models for the semiconductor industry, consisting of production and distribution chains, where manufacturing characteristics are considered. Three policies for the production chain and two policies for the distribution chain are suggested and formulated mathematically. Six combination policies are tested for the evaluation of performances with example, it is shown that the supply chain is operated, if production and distribution are coordinated and managed based on the demand information, without inventory, as efficiently as the chain with inventory.

제 2 발표장 : 섬유의 분포를 고려한 단섬유 보강 금속 복합재료의 탄성계수 예측

정성욱,김영찬,김상엽,한경섭 한국복합재료학회 1997 한국복합재료학회 학술발표대회 논문집 Vol.- No.2

서평 : 장 바티스트 드 라마르크, 이정희 옮김, 동물 철학 (지만지, 2009)

정성욱 한국과학사학회 2014 한국과학사학회지 Vol.36 No.3

Synthesis of Core-Extended Triarylamine Derivatives and Light Induced Chiral Self-Assembly in Chlorinated Solvents

정성욱,박창준,김동휘,김상율 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.2

Triarylamine (TAA) derivatives show self-assembly behavior in several organic solvents. Especially, in chlorinated solvents, TAA compounds are oxidized into the radical cation under light irradiation and transformed to nano-rod type self-assembled structures. Interestingly, when TAA derivatives in chlorinated solvent are exposed to circularly polarized light (CPL), chiral self-assembled supramolecules with helicity were obtained. Here, we synthesize the TAA compound with an increased number of aromatic rings at core and induce the chiral self-assembly by irradiation of circularly polarized light (CPL). Chiral self-assembled structure obtained from the core-extended TAA compound is expected to show improved stability much more than the stability of chiral supramoleculs from triphenylamine derivatives.