Accuracy on the Edge Detection of Topography for Digital Map Manufacture

Park, Woon-Yong,Song, Youn-Kyung,Bae, Kyung-Ho,Kim, Yong-Suk 東亞大學校 建設技術硏究所 2005 硏究論文集 Vol.28 No.2

Currently, digital maps in the metropolitan area are supposed to be revised and renewed every two years, but it is difficulty for the renewal of current information to keep pace with the quickly changing society and so, one of the alternative methods being discussed is a digital map produced using high resolution satellites. The biggest problem in the production of digital maps using high resolution satellite images is the difficulty of production in vector resource format through edge detection of satellite images, a Raster data. In this study, topographical boundaries were detected through edge detection of the satellite image, and after vectorliezing using the screen digitizing method, the results were evaluated and compared to the digital map from the NGII(National Geographic Information Institute) for accuracy.

연령증가에 따른 혈압요소들의 좌심실비대 및 관동맥질환과의 관련성

박재석,박창규,박미영,박재형,김용현,나진오,신성희,서순용,홍순준,박성미,임홍의,김응주,서홍석,오동주,노영무 대한순환기학회 2004 Korean Circulation Journal Vol.34 No.2

방사선사진의 인덱스-순서 분석을 통한 치아경조직의 탈염화 검출

박동현,박영호,김경숙,박정훈,이기자,최삼진,최용석,황의환,박헌국 대한구강악안면방사선학회 2009 Imaging Science in Dentistry Vol.39 No.2

Purpose : The purpose of this study was to develop the radiographic technique for detecting the demineralization which is known as indication of dental caries. Materials and Methods : This technique was based on the comparing of multiple radiographs which was irradiated by multiple X-ray spectra. For the meaningful comparing, the multiple radiographs were reconstructed to the dosimetrically consistent images using a standard material. The difference of resulting images of same target with multiple spectra represents the difference of response of material as regards the spectra. Results : We have found about 10% of demineralization of dental hard tissues particularly in the proximal region through the analyzing of differences. Conclusion : Most intriguing thing in this investigation was that the method to analyze difference shows us to an anatomic structure of dental hard tissues even if absolute values of optical density were excluded during the procedures.

Linear Combination Analysis Using GPS Data

Park, Woon-Yong,Lee, Dong-Rak,Back, Ki-Suk,Hong, Jung-Soo 東亞大學校 建設技術硏究所 2005 硏究論文集 Vol.28 No.2

We can process and compute the position, velocity and time by satellite signals of GPS. The signals are used to compute positioning of three dimensions and timing offset of the receiver clock when we can track the tour satellite signals at least. One of the specified aims is to use less expensive single frequency code/carrier phase GPS receivers, which are typically around half the price of dual frequency receivers. In the study, the author analyzed the accuracy and applicability of frequence linear combination using triangulation points evaluated distance limitation.

경주지역 여고생의 초경과 체성장간의 관계

김준섭,권오구,박진석,오종수,박정현,박제식,안세한,이용환,서정호,신태섭,최영배,김덕수,이관,박수경 東國大學校醫學硏究所 2002 東國醫學 Vol.9 No.1

본 연구는 경주지역 1개 고등학교 3학년 여고생을 대상으로 초경 시작 전인 초등학교 4학년부터 고등학교 2학년까지의 키, 몸무게, 가슴둘레 수치와 초경 연령을 파악하여 여성의 초경이 빠를수록 체성장 속도의 변화가 있을 것이라는 가설을 기초로 두 요인간의 관련성을 파악하고자 시행되었다. 경주시 1개 여자고등학교 3학년생 총 317명에 대해 ㅊ경 나이, 초경시 심리 상태, 초경이 시작되었을 때의 상담 여부와 상담하였던 사람, 부모 신장과 초경전후의 식사 규칙성, 다이어트 경험, 수면시간, 스트레스, 음주/흡연 여부, 질병력 등에 대한 설문 조사를 시행하였고, 초등학교 4학년부터 고등학교 2학년까지의 키, 몸무게, 가슴둘레에 대한 정보는 건강기록부에서 확보하였다. 상기 대상자 중 건강기록부가 분실된 39명, 초경나이에 대해 응답하지 않았던 29명 및 결석 등으로 조사를 하지 못하였던 42명을 제외한 조사 대상자는 206명으로 선정하였다. 대상자들의 초경연령 평균값(Mean±SD)은 13.0±1.11이었고, 초등학교 4학년부터 고등학교 2학년까지의 초경 이후 신장 성장률은 감소하였으며, 초경연령이 빠른 군이 초등학교 때는 신장에 있어서 우위를 차지하나 고등학교에 오면서 신장은 비슷한 수준이 되었다. 초경후 1-2년 사이에 체중과 흉위의 증가율은 감소하였고, 초경연령이 빠른 군이 초등학교와 고등학교 사이에 체중과 흉위에서 모두 우위를 차지하였다. 본 연구의 결과는, 흔히 이차 성징의 시작 시점 혹은 사춘기의 시작 시점으로 보고있는 초경 연령이 청소년기의 성장과 밀접한 관련성이 있고, 특히 체중과 흉위의 성장 속도와 밀접한 관련성이 있음을 시사한다. To understand the onset of menarche in relation to changes in physical growth that take place during female adolescence, especially the changes in height and weight velocity. The 207 senior in one women high school of Kyongju were investigated in April 3 to 8, 2001. We collected the information, relation in the age at menarche, height & weight of parents, regularity of eating, and obesity diet, duration of sleeping, sickness & stress near age at menarche, by self-recording. The status of height, weight & chest circumference between the 4th grade of primary school and the junior of high school was collected by individual Health Record. The results were followed; The average age at menarche was 12.95±1.11 years old and the most frequent age of menarche is 13 years. After menarche, the velocity of height, weight and chest circumference were decreased. The most rapid group of menarche hold dominant position in height during elementary school. As time passed, they dont hold dominant position in height. The most rapid group of menarche get an advantage in the weight and the girth of chest after elementary school. The height of subjects is directly proportional to the height of their parents. These results suggest that the starting age at menestuation can be closely associated with physical growth and development.

Benzanilide類의 光化學

朴龍泰,黃正儀,鄭倧在,呂壽東,洪錫 慶北大學校 物理化學硏究所 1981 硏究論文集 Vol.1-2 No.-

Several model compounds for photocyclization of alkaloids were synthesized. When benzanilide was irradiated with UV lamp in quartz photocell, surprisingly 2-aminobenzophenlone and 4-aminobenzophenone were produced as a Photo-Fries reaction. However, when the benzanilide was irradiated in Pyrex photocell, the expected photocyclic compound, phenanthridone was appeared. Orthosubstituted benzanilildes in Pyrex photocell also gave 8-substituted-9-oxyphenanthridines. Thus, the dihydrophenanthridone was assumed as intermediate of the photocyclization of benzanilides as model for alkaloid photocyclization reaction.

Diphenyl(N'-hydroxymethyl)ureidophosphonate의 합성과 면섬유에 대한 방염성

박주연,조용석 대구효성가톨릭대학교 응용과학연구소 1994 응용과학연구논문집 Vol.3 No.-

This is a study for a new flame retardant, Diphenyl(N'-hydroxymethyl)ureidophosphonate(DPHMUP), made from phosporous compound and urea. By the introduction of urea, it is expected that the new flame retardant has better flame re-tardancy and durability particularly on cotton fabric than other phosporous based flame re-tardants, since in urea nitrogens are contained. For he examination of the effectiveness of the flame retardancy of the new flame retar-dant the flame retardancy of cotton fabrics treated by DPHMUP through PDC process was examined. Further, in order to figure out the physical property change of the DPHMUP pro-cessed cotton fabrics, the change of drape stiffnesses, the wrinkle recoveries, and the tensile strengths, were examined. The results of this study are summarized as follows : (1) A new flame retardant, DPHMUP, for cotton fabrics was synthesized by an effective and economic method without using pyridine or tetiary amine for the removal of HCl (2) The cotton fabrics which is treated with DPHMUP has been found to have better flame retardancy than other already existing phosporous based flame retardants. (3) The optimum condition for PDC process found is that the curing temperature is 160℃, the DPHMUP concentration is 30%, and the fixing agent hexamethylolmelamine (HMM)/DPHMUP weight ratio is 1/8. (4) The drape stiffness and the wrinkle recovery of the processed fabrics increase with in-creasing DPHMUP concentration. (5) When cotton fabrics processed by the weight ratio 1/8 of HMM/DPHMUP solution, the tensile strength decreases, while the decreasing rate of the tensile strength retention ratio increases with increasing DPHMUP concentration.

스포츠 매니지먼트활동에서 매니저들의 책임 수행에 관한 연구

박준석,김정묵,정석현,조영웅,이영성 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.1

Sport has taken a position as significant influence all over the world for a long time. These days, sport must exist with us in order to provide pleasure, so people have a tendency to expect it what happens to them. Therefore, a number of sport teams and competitions are able to stimulate people to be interested in sport. Sport event, information, equipment, and sport player management need systems which accompany with security and pleasure because the systematical managements establish security, and help sport players not to make an error that is a fountain of good quality game. Thus, sport players improve their ability, so the audience are willing to pay to see the game. In order to extend the power of sport influence, sport should be organized in terms of managing sport processes well. Unfortunately, the system of management for sport is not still adequate and organized in Korea. In other words, many materials must be sporadic, and newspapers or magazines have treated of sport management with fragmentary knowledge so far. Today, systematical management is essential to all segments of the sport industry, professional or amateur, school or club, private or government at any level community or individual. Hopefully, this research will be instructive as a starting point to derive a special quality of sport management which is suited to korea sport market by comparing to other management systems in order to formulate organized management industry.

전통적 유전자 알고리즘에 의한 복합재료 구조물의 최적 설계

박정선,이수용,류석규 한국 항공대학교 항공산업기술연구소 1999 航空宇宙産業技術硏究所 硏究誌 Vol.9 No.-

유전자 알고리즘에 의해서 복합재료 구조물을 최적화 시켜 보았다. 유전자 알고리즘은 이산 변수를 고려할 수 있기 때문에, 설계 변수가 적층수와 적층각도 같은 이산 변수인 경우에서는 전통적 최적화 방법보다 정확한 최적값을 구할 수 있다. 유전자 알고리즘의 이러한 특성을 연구해 보기 위해서, 전통적 최적화 기법의 일환인 modified method of feasible directions (MFD)에 의해 복합재료 구조물을 최적화 시켜 보고 유전자 알고리즘에 의한 최적값과 비교, 분석해 보았다. 본 연구의 해석결과 유전자 알고리즘이 MFD보다 목적 함수에서 우수한 값을 나타낸다는 것을 알 수 있었다. In this study, a composite structure is optimized by using Genetic Algorithm (GA). Discrete variable scan be considered in GA. The GA is able to find better optimum than the classical optimization methods in considering design variable such as ply number and ply angle(orientation). To study the characteristics of the GA, a composite structure is optimized by the modified method of feasible directions (MFD) and GA. The results are compared and discussed. This result show that the GA provides better optimal results than MFD in the objective function value.

기(氣)수련이 스트레스 반응에 미치는 영향

박미숙,이명수,정영자,김혜정,문성록,김용규 한국스포츠심리학회 2003 한국스포츠심리학회지 Vol.14 No.3

본 연구는 스트레스 반응을 측정하는 스트레스 반응 척도 설문지(Symptoms of Stress: SOS)를 이용한 횡단적 연구로서 심신수련의 하나인 기수련이 스트레스 반응에 미치는 효과를 살펴보았다. 72명의 건강한 정상인과 180명의 기수련자를 대상으로 하여 조사하였으며, 기수련자들은 수련기간에 따라 초급군(1-4개월; 64명), 중급군(5-12개월; 50명), 고급군(1년 이상; 66명)로 나누었다. 실험결과 1년 이상 수련한 기수련자들이 말초혈관 증상군, 심폐 증상군, 중추신경계 증상군, 위장계증상군, 습관적 행동 형태군, 우울 증상군, 불안증상군등의 스트레스 반응 하위척도에서 대조군에 비해 통계적으로 유의하게 감소하였다. 전체 스트레스 값은 대조군에 비해 기수련자 집단이 아주 낮았으며 수련기간이 길수록 감소하였다. 이러한 결과는 기수련이 스트레스 중재와 스트레스 증상을 줄이는데 효과가 있음을 나타낸다. We examined the effects of Qi-training, one of Korean traditional psychosomatic training, on stress coping ability by cross-sectional investigation with inventory of symptoms of stress (SOS). Four types of groups- normal healthy (n-74), three groups of Qi-trainees (group primary level: subjects with Qi-training for 1-4months, n=64; middle level: 5-12 months, n=50; high level: more than 12 months, n=66) participated in this study, Qi-trainees with over 1 year training had significantly lower scores in all SOS subscales compared to controls. Total stress scores of Qi-trainee groups were substantially lower than controls and further reduction with larger training periods. These results suggest Qi-training is effective in stress management and decreasing symptoms of stress