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.

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

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.

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.

WHO 침구임상 지침서 개정을 위한 국제회의 보고

박히준,서정철,김세현,김상우,안경애,임사비나,김용석,최도영,강성길 EAST-WEST MEDICAL RESEARCH INSTITUTE KYUNG HEE UNI 2005 東西醫學硏究所 論文集 Vol.2005 No.-

The Working Group on the revision of Clinical Research Methodology for Acupuncture met in Seoul, Republic of Korea from 24 to 26 August 2005. The main objectives of the meeting were to review the regional publication guidelines for Clinical Research on Acupuncture, to make necessary revisions in the guidelines, to make recommendations on further collaboration and activities in the field of research on acupuncture, and to discuss scientific evidence-based approaches in the clinical research on acupuncture. Fourteen members from the eight Member States, one secretariat staff from the WHO Regional Office for the Western Pacific and ten observers from the Republic of Korea attended the meeting. The members presented their papers to review the current status of clinical research on acupuncture. The drafts of proposed revision to the previous guidelines for clinical research methodology on acupuncture were discussed extensively. The issues covered during the discussion included: the definition of the new terms; reorganization of clinical research design; revision and update of contents (e.g., control group); introduction of Institutional Review Board (IRB) on the section of ethical approval; additional outcomes including health-related quality of life (HRQOL), qualitative measures, etc. In the course of these discussions, the working group developed the revised guidelines for clinical research on acupuncture and made recommendations for promoting the dissemination of the revised guidelines.

서머힐의 자유가 갖는 정신분석학적 의미

박용석 한국니일연구회 1994 자율교육 Vol.- No.3

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.

인공 치아우식 발생 모델에서 디지털 방사선 공제술을 이용한 인접면 치아우식증의 진단

박정훈,최용석,황의환,이기자,최삼진,박영호,김경숙,진현석,홍경원,오범석,박헌국 대한구강악안면방사선학회 2009 Imaging Science in Dentistry Vol.39 No.1

Purpose : The purpose of the experiment was to evaluating the diagnostic ability of dental caries detection using digital subtraction in the artificial caries activity model. Materials and Methods : Digital radiographies of five teeth with 8 proximal surfaces were obtained by CCD sensor (Kodak RVG 6100 using a size #2). The digital radiographic images and subtraction images from artificial proximal caries were examined and interpreted. In this study, we proposed novel caries detection method which could diagnose the dental proximal caries from single digital radiographic image. Results : In artificial caries activity model, the range of lesional depth was 572-1,374 μm and the range of lesional area was 36.95-138.52mm². The lesional depth and the area were significantly increased with demineralization time (p<0.001). Furthermore, the proximal caries detection using digital subtraction radiography showed high detection rate compared to the proximal caries examination using simple digital radiograph. Conclusion : The results demonstrated that the digital subtraction radiography from single radiographic image of artificial caries was highly efficient in the detection of dental caries compared to the data from simple digital radiograph.

기(氣)수련이 노인과 청년의 호중구 기능에 미치는 영향

박미숙,이명수,문성록,김용규 圓光大學校 附設 體力科學硏究所 2003 體力科學硏究 Vol.26 No.1

The main objective of this study is to examine the effect of Qi-training on the immune system, especially neutrophil bactericidal function. Nine healthy young male subjects and 9 elderly were studied for the effects of one bout of Qi-training on superoxide (O_(2)) production and adhesion capacity of neutrophils at times immediately after (Post Ⅰ) and 2hours after the Qi-training (Post Ⅱ). The Qi-training enhanced the O_(2) production, reaction velocity and neutrophil adhesion capacity and there were significant differences at Post Ⅰ compared to before Qi-training (Pre) in both group. Therefore, Qi-training increase the resistance of trained individuals against common infection and inflammation.