배가스 폐열회수를 위한 히트파이프 적용성 검토

전용두,박기호,고석보 公州大學校 工學硏究院 生産技術硏究所 2005 論文集 Vol.13 No.-

A Series of experiments are performed to investigate the heat transfer characteristics of sintered metal wick heat pipe especially focusing on the operational limit of maximum allowable thermal loads and the effect of inclination slope. Tested heat pipes are composed of copper tube with pure water as a working fluid. The outer diameter of the heat pipe is 6mm and the total length is 300mm, which covers the evaporator section(50mm), adiabatic section(100mm) and condenser section(150mm). respectively. Experimental data of wall temperature distribution along the axial locations are obtained to evaluate the performance of the heat pipe at different slopes. Each test is performed by changing the input thermal loads ranging from 5W to 30W.

제주도 연안 갈치 채낚기 어구의 생력화 : 1.연속식 채낚기어구의 모형 실험

서두옥,정용진,김석종,이창헌,김고환,박용석 제주대학교 해양연구소 2000 해양과환경연구소 연구논문집 Vol.24 No.-

The authors carried out a model experiment of continuoius hairtail hand line on the rooftop in order to obtain the fundamental data on elimination of labor with haritail hand line in the coast of Jeju. The results are as follow ; 1.The continuous main line was rotated smoothly by driving roller. 2.The branch lines and hooks on a main line which was rotated by rotary machine were entangled slightly. 3. The branch lines attached to rubbered model of hairtails to hooks were rotated continuously by the rotary machine.

동절기 신관리 석실고분 내부의 온·습도 분포특성

전용두,이금배,김홍기,고석보 공주대학교 문화재보존과학연구소 2004 문화재과학기술 Vol.3 No.1

개방된 고분의 장기보존은 조상의 얼이 담긴 문화재를 길이 후손에 물려주어야 하는 우리들의 시대적 사명이라 할 수 있다. 그런데 고분 내부의 공기조화를 필요로 하는 경우 설비측면에서 고분내부의 공기조화 문제를 검토한 사례는 그 동안 많지 않았다. 특히 고분 내부환경에 관한 온·습도 자료는 매우 제한적으로 알려져 있는 상태이다. 본 연구는 고분의 공기조화와 관련하여 부하산정 등의 기초자료로 활용하기 위한 고분내부의 온·습도자료를 원격측정 기술을 적용하여 획득한 결과를 소개하며, 이를 통하여 고분내부의 실내환경 조건에 대한 일반의 이해를 돕고, 더 나아가 공조기 설치에 필요한 기초자료를 제공하고자 수행하였다. 측정 연구대상은 충남 공주시 신관동에 소재한 신관리석실고분(충청남도 기념물 제 7호)으로서 백제후기의 횡혈식 석실고분으로서 현실의 크기는 폭 1.25m, 깊이 2.73m 그리고 높이 1.50m이며, 현실입구는 개방된 상태에서 실내 5채널 및 실외공기에 대하여 각각 온도와 습도를 측정하였으며, 본 본문에서는 동절기(12월부터 다음 해 3월까지)의 자료를 소개한다. In recent years the importance of the preservation of cultural artefacts like ancient tombs has been widely accepted domestically and internationally as the quality of life improves. However not much attention has been paid for the facilities and systems to preserve those artefacts. Even the general understanding of the preservatory environment of the underground space as tombs is poor. In the present study, the temperature and relative humidity inside a selected artefact, Shinkwan-ri tomb, are monitored to improve the understanding of the indoor thermal environment, which may possibly be used when one consider air-conditioning for preservation. Total of 12 channel data are collected by using remote data acquisition system based on the cdma(Code Division Multiple Access) technology. Three-month-data representing winter season is reported with discussions.

공조시스템을 적용한 석실 고분내 온ㆍ습도 분포

전용두,이금배,박진양,고석보,전희호 公州大學校 工學硏究院 生産技術硏究所 2005 論文集 Vol.13 No.-

Although the importance of good conservation of historic sites including ancient royal tombs is well aware, still not much attention has been paid for the facilities and systems to preserve those historic sites, which includes precious artifacts as wall paints and carved works, etc. Even the general understanding about the environment of the underground space of tombs is not satisfactory. In Korea, researchers have recently begun addressing the above issue and are making efforts to develop suitable HVAC(heating, ventilating and air-conditioning) systems for conservation of tombs. An experimental investigation was carried out to study the behavior of the HVAC system installed for a tomb. This tomb resembles in size and shape the original stone built tomb of Baek-je Dynasty, which dates back to 6th Century in southwest part of Korean peninsula. In this study, an HVAC system for a tomb(D×W×H=1.3m×3.0m×1.2m) was installed to maintain sui표 indoor conditions for conservation of tomb. The temperature and humidity inside the tomb were measured different of the setting. Finally, performance of the HVAC system is presented and discussed.

제주도 연안 갈치 채낚기 어구의 생력화 : 1. 연속식 채낚기어구의 모형 실험

서두옥,정용진,김석종,이창헌,김고환,박용석 제주대학교 해양연구소 2000 해양자원연구소연구보고 Vol.24 No.-

The authors carried out a model experiment of continuous hairtail hand line on the rooftop in order to obtain the fundamental data on elimination of labor with hairtail hand line in the coast of Jeju The results are as follow : 1. The continuous main line was rotated smoothly by driving roller. 2. The branch lines and hooks on a main line which was rotated by rotary machine were entangled slightly. 3. The branch lines attached to rubbered model of hairtails to hooks were rotated continuously by the rotary machine.

수중 가청음에 의한 쏨벵이의 청각능력 : 2. 청각 임계비

이창헌,박용석,문종욱,강창익,김고환,서두옥 제주대학교 해양연구소 1999 해양자원연구소연구보고 Vol.23 No.-

수중 가청음은 어군의 행동 제어와 해양목장화에서 음향 순치에 많이 이용되고 있다. 수중 가청음에 의한 어류반응 해석을 하기 위해서는 물고기의 청각능력을 정확히 파악할 필요가 있으며,오래전부터 여러물고기의 청각능력을 관련된 연구가 수행되었다.

고분보존용 항온ㆍ항습 System의 동절기 운전특성

이금배,전용두,고석보,김홍기 公州大學校 工學硏究院 生産技術硏究所 2003 論文集 Vol.11 No.-

본 연구는 여러 가지 문화재 보존영역 중 개방된 고분의 장기보존을 위한 최적 공기 조화 시스템의 개발을 목표로 하여 수행되었다. 고분의 장기보존을 위해서는 고분 내 공기조성, 온ㆍ습도 및 기류환경을 모니터하여 고분내 자연 실내환경의 기초자료를 확보한 수 고분의 주 구성요소인 석재 및 전재의 보조측면에서 문제점을 검토하여 최적 유지환경조건을 정의하고, 이상의 요구조건을 실현할 수 있는 공조시스템의 적용이 필요하다. 본 논문은 이 중 모형고분에 적용된 공조시스템의 동계운전성능에 대하여 소개한다.

Modeling of Grade Change Operations in Paper Plants

Jun Seok Ko,Yeong Koo Yeo,Seong Mun Ha,Du Seok Ko,Hong Kang 한국펄프·종이공학회 2003 한국펄프·종이공학회 학술발표논문집 Vol.- No.-

전북지역 초·중등학생의 두개하악장애 증상 유병률에 관한 연구

고상진,한두석,한경수 원광대학교 치의학연구소 1994 圓光齒醫學 Vol.4 No.1

In this epidemiological study, 2121 school children(1050 boys and 1071 girls) that aged 9-16 years were surveyed. The subjects were randomly selected in cities of Jeonbuk, Korea and a questionnaire consists of 30 items including symptoms of craniomandibular disorders(CMD) and contributing factors to CAM were given to them. The author explained the definition of each item to subjects and they checked the answer of each item for themselves. The data were processed with regard to the prevalence of items and difference by Age or Sex with SPSS/PC+ package. The obtained results were as follows: 1. Among symptoms of CND, joint pain by hard food chewing showed the highest rate of occurrence(40.8%) and locking sensation during mouth opening showed the lowest rate(5.4%). Symptoms with consistently increased rate of occurrence with age were joint sound, joint pain by hard food chewing, discomfort and/or spasm of jaw muscle. 2. With regard to prevalence of bad oral habit, about 12% of subjects had bruxism or clenching, respectively, but 35.1% had biting of pencil, ball point pen, 61.0% had lip biting or nail biting. 3. There were some items which always occurred more in one of boys and girls without regard to increase of age. In boys those were clenching first under stress, family and/or friend look like disregarding me, experience of shock or heavy force to jaw, and in girls nail biting, lip biting or chin in hand, getting cross without reason. 4. There was 64.2% of total subject that have one or more symptoms of craniomandibular disorders.

Dental Panoramic Radiography in Age Estimation for Dental Care using Dark-Net 19

Jihyeong Ko,Yu-Rin Kim,Han-Jeong Hwang,Won-Du Chang,Man Seok Han,Seoul-Hee Nam,Young-Jin Jung 한국자기학회 2022 Journal of Magnetics Vol.27 No.4

A rapidly increasing human lifespan has led to population aging with growing demands for healthcare, including dental healthcare services. The oral cavity plays a crucial role in mastication and speech. Furthermore, artificial intelligence (AI) has extensively developed, and automated diagnostic technology continues to evolve. Therefore, it is necessary to integrate objective AI, automatic diagnosis, and dental care to reduce errors resulting from subjective diagnosis. This study used 15,000 dental panoramic X-ray images to train an AI algorithm and estimate dental age, using Darknet-19 for the AI model. The accuracy was about 84 % and 96 %, respectively, when the dental estimate acceptable range was ± 5 and ± 10 years. Based on this model, patients could evaluate their oral condition and improve their quality of life using appropriate treatment and prevention methods.