실과교과 내 학문영역간의 내재적 통합에 관한 연구

김용익(Kim Yong Ik),박행모(Park Haeng Mo),방기혁(Bang Gi Hyeuk),이성숙(Lee Seung Sug),표준영(Pyo Jun Yeong) 한국실과교육학회 2004 한국실과교육학회지 Vol.17 No.3

Traditionally, practical arts subject have been organized into three parts such as home economics area, agriculture area, and technology area. But rigid classification among these areas have prevented the improvement of practical arts education on the contrary. Therefore, intrinsic integration of disciplinary parts within the practical arts subject were needed to solve this problem. According to the result of this study, it was identified that a lot of sub units of practical arts textbook could be integrated one another. For example, a sub unit of ‘vegetable growing(agriculture area)’ could be integrated into ‘cooking with vegetable(home economics area)’, ‘using cooking tools(technology area)’. And a sub unit of ‘dealing with electrical equipment’ could be integrated into ‘making wooden house for a pet dog(technology area)’, ‘installing lightening for a pet dog(technology area)’, and ‘making clothes for a pet dog(home economics area)’. In conclusion, intrinsic integration of disciplinary parts within the practical arts subject was found to have high validity and possibility.

코디어라이트 허니컴 압출용 혼합체의 점성거동에 관한 연구

송용익,김형태,이진구,윤원중,류성수,Song, Yong-Ik,Kim, Hyung-Tae,Lee, Jin-Gu,Yoon, Won-Jung,Ryu, Sung-Soo 한국분말야금학회 2010 한국분말재료학회지 (KPMI) Vol.17 No.1

The rheological behavior of a cordierite honeycomb extrusion paste was investigated by measuring torque values in a Brabender plastograph. The extrusion pastes were formulated using binder (methy cellulose, MC), solvent (water), plasticizer (ploy ethylene glycol, PEG) and lubricants (oleic acid, OA). The mixing sequence and optimum organic binder, at least for homogeneous mixed state, can be determined from the rheological point of view. 3%MC-30%$H_2O$-1.5%PEG-1.0%OA with respect to the cordierite powder was chosen as a binder composition for the extrusion process of cordierite powder.

공간 연관규칙을 이용한 대형할인점의 입지 분석

이용익(Yong-Ik Lee),홍성언(Sung-Eon Hong),김정엽(Jung-Yup Kim),박수홍(Soo-Hong Park) 대한지리학회 2006 대한지리학회지 Vol.41 No.3

본 연구의 목적은 1990년대부터 급속히 증가한 대형할인점에 대하여 입지영향인자를 추출하여 의사결정에 객관성을 확보하고 대량의 데이터베이스를 이용하여 숨겨진 유용한 정보를 입지 선정에 활용하는 것이다. 이를 위해 대형할인점이 입점하는데 미치는 인구학적 변수, 경제학적 변수 그리고 주변환경적 변수에 대한 다양한 인자를 통계자료를 수집하고 연구대상 지역의 공간 자료를 구축하여 공간 연관성 분석을 실시하여 공간 연관규칙을 추출하였다. 결과의 검증을 위해 추출된 규칙과 대형할인점의 매출액을 이용한 적용성 여부를 상호 비교하였다. 검증 결과 추출된 공간 연관규칙이 해당 대형할인점에 많이 부합할수록 매출액도 많은 것으로 나타났다. 본 연구를 통해 공간 연관규칙을 활용하여 객관적이고 매출에 이익을 주는 대형할인점의 최적입지 선정을 기대할 수 있다. The objective of this research is to achieve an objectivity of site decision after extracting site decision factors on a large-scale discount store(LSDS) and utilize any hidden information using the association rules mining through huge database. To catch this objective, we collect a census, economic , and environmental dataset related with locating of LSDS. And then, we construct a spatial data on the research area. These data is used for the extraction of a spatial association rules. To verify whether the extracted rules are suitability or not, we use the sales of some LSDS. As the result of test, the more sales, the more factors of the extracted rules relate with the sales it coincides. Consequently, the spatial association rules mining is efficient method which support the ideal site decision of LSDS.

GIS와 국가인구통계자료 통합에 의한 입지분석용 정밀인구통계지도 구축 방법

이용익(Lee, Yong-Ik),홍성언(Hong, Sung-Eon) 한국산학기술학회 2009 한국산학기술학회논문지 Vol.10 No.11

본 연구에서는 다양한 입지분석에서 이용되고 있는 인구추정의 정확도와 신뢰성의 향상을 기하고자, GIS와 국가인구통계자료를 이용하여 정밀한 인구통계지도를 구축할 수 있는 방법을 제시하였다. 제시한 방법은 다음과 같 다. 주거지, 상업 및 업무지의 토지이용이 인구와 상관성이 높다는 것을 분석․도출하여, 세부 토지이용(비오톱) 유형별 로 다중회귀분석을 실시하였다. 그런 후 인구거주 밀도 별로 가중치를 부여하여 인구를 동별 토지이용 유형별로 재분 배하는 방법으로 정밀한 인구통구통계 지도를 구축하였다. 본 연구의 방법은 그간 다양한 입지분석에서 이용되었던 인구추정 방법보다 정확도와 신뢰성의 향상을 가져올 것으로 기대된다. The objective of the present study lies in providing the method to construct the precision population-statistical map for statistical demographics making full advantage of GIS and the national census data in an attempt to improve accuracy and reliability of population estimation applicable for a variety of location analysis. More specifically, it adopts the multiple regression analysis by segmented land use type(biotope) taking into account that the land use diversified as residence, commercial and office areas has the close connectivity and interdependence with population. Based on the analyzed result above, the study finalizes the modeling to construct demographic map with higher precision by prioritizing the population density by weight value and then re-distributing the population according to jurisdictional dong's and types of use for the land. The study consequently is expected to be conducive to improving precision and reliability rather than the existing method for population estimation widely acceptable thus far.

초음파 측정기를 이용한 20대 남성 체지방률 추정식 개발

김용익(Kim, Yong-Ik),이미영(Lee, Mi-Young),강성기(Kang, Seoung-Ki) 한국사회체육학회 2022 한국사회체육학회지 Vol.- No.87

Purpose: The purpose of this study is to develop an equation for estimating body fat percentage for men in their twenties using an ultrasonic measuring device. Method: The percentage of body fat was measured on male students in their 20s in Gyeonggi-do. For the development of the estimation formula according to the internal cross-validity procedure, 105 subjects were divided into 70 in the estimation-type development group and 35 in the cross-validity test group. The regression formula development exploration and validity analysis were conducted. Results: As a result of the analysis, the coefficient of determination was 82% and the standard error was 3.2% in the estimation formula at the development stage. In cross-validity, the estimated body fat percentage did not differ from the measured body fat percentage (p=.660), and the coefficient of determination was 94% and the total error was 2.2%. The final estimation formula that synthesized all the research results was y=2.245+1.125x. Conclusion: In conclusion, the validity of the body fat ratio estimation formula developed based on the ultrasonic measuring device is verified. When this formula is applied to men in their 20s in Korea, it is confirmed that it is suitable for the individual together with the group.

경피적 관동맥 확장술의 시술량과 조기 시술결과의 관련성

김용익,김창엽,이영성,김선민,이진석,오병희,강영호,Kim, Yong-Ik,Kim, Chang-Yup,Lee, Young-Sung,Kim, Sun-Mean,Lee, Jin-Seok,Oh, Byung-Hee,Khang, Young-Ho 대한예방의학회 2001 Journal of Preventive Medicine and Public Health Vol.34 No.1

Objectives : To explore the relationship between Percutaneous Transluminal Coronary Angioplasty(PTCA) volume and the associated immediate outcome. Methods : A total of 1,379 PTCAs were peformed in 25 hospitals in Korea between October 8 and December 31 in 1997. Data from 1,317 PTCAs (95.5%) were collected through medical record abstraction. Inter-observer reliability of the data was examined using the Kappa statistic on a subsample of 110 PTCA procedures from five hospitals. Intra-observer reliability of the data was also examined. PTCA success and immediate adverse outcomes were selected as the outcome variables. A successful PTCA was defined as a case that shows less than 50% diameter stenosis and more than 20% reduction of diameter stenosis. Immediate adverse outcomes included deaths during the same hospitalization, emergency coronary artery bypass graft (CABG) within 24 hours after PTCA, and acute myocardial infarction within 24 hours after PTCA. The numbers of PTCAs performed in 1997 per hospital were used as the volume variables. Results : Without adjusting for patient risk factors that may affect outcomes, procedures at high volume hospitals ($\geq200$ cases per year) had a greater success rate (P=0.001) than low volume hospitals. There was a marginally significant difference (P=0.070) in major adverse outcome rates between high and low volume hospitals. After adjusting for risk factors, there were significant differences in procedural failure and major adverse outcome rates between high and low volume hospitals. Conclusions : After adjusting for patient clinical risk factors, the hospital volume of PTCA was associated with immediate outcomes. It is recommended that a PTCA volume per year be established in order to improve the immediate outcome of this procedure in Korea.

주택 화재의 플래시오버 특성 분석

이용익(Lee Yong Ik),김학중(Kim Hak Joong) 한국방재학회 2018 한국방재학회지 Vol.18 No.4

지난 수십 년 동안 주거환경변화에 따라 화재환경도 변했다. 주택크기가 높고 넓어질수록 화재를 지탱하고 성장시킬 수 있는 공기가 더 많아지며, 주택 내 벽이 제거됨에 따라 구획이 줄어들어 연기와 화재가 빨리 전파된다. 오늘날 주택의 내용물은 카펫, 플라스틱, 복합재료 등 대부분 합성재료로 과거의 목재 기반재료 보다 열 방출 속도가 훨씬 높아 화재가 더 빠르게 성장하고 빠른 플래시 오버가 발생하고, 대부분의 주택들이 경량 재료로 시공되었기 때문에 화재 시 구조적 붕괴 위험성이 더 커졌다. 이러한 화재 환경변화는 거주자가 피난 할 수 있는 시간과 소방관이 화재에 대응 할 시간이 짧아졌음을 의미한다. 본 연구에서는 화재 시 일반화재보다 인명 피해율이 높은 일반주택을 대상으로 실물화재실험을 하여 각 세대 별 화재발달과정과 온도분포를 분석하였다. 실험결과 화재성장에서 화염의 높이, 가연물의 종류, 양, 배치, 환기조건이 화재성장에 영향을 미치는 것으로 판단된다. 플래시오버는 점화 후 4분, 15분에 발생하였고, 500~600℃구간에서 5초, 3초 사이에 발생하였다. 플래시오버 전 400~500℃ 구간에서 평균온도 및 상승시간은 평균온도가 450.2℃ 및 426.5℃로 상승시간은 3초, 10초 소요되어 연소속도가 빠르면 급격한 온도 상승이 있은 것으로 판단되었으며, 플래시오버 후 600℃~최고온도 구간은 평균온도 및 상승시간은 평균온도는 729.8℃, 757.5℃ 상승시간은 69초, 150초 소요되어, 평균온도 및 최고온도가 높아 화재하중이 높은 것으로 판단된다. Dynamical changes in fires over the past few decades as a result of changes in housing condition. Fire flame and smoke spread quickly because of decreasing compartment in house. The oxygen that can grow fire increase as the housing size is bigger and bigger. these days because the contents of house is constructed with plastic, composite material and polymeric material, fire growth velocity and flash-over reached time is faster. Because most house is constructed with lightweight material, the collapse risk of house is higher. This means that evacuation and fire-fighting time become short. This study conducted a real fire test on an ordinary house that have more damage of human life than other fire. The fire development process and temperature distribution were investigated during the real test. As a result of the test, fire development is influenced by the height of flame, the kind of combustibles, the amount of combustibles, the placement of combustibles and ventilation condition. The flash over was reached 4, 15 minute after ignition, and 5, 3 second at 500~600℃ section. At before flash over, 400~500℃ section average temperature was 450.2℃, 426.5℃ and growth time was 3 second, 10 second. this shows that if combustion velocity is fast, the temperature rise is sharp. At after flash over, 600℃~max. temperature section average temperature was 729.8℃, 757.5℃ and growth time was 69 second, 150 second. this shows that if average and max. temperature is high, the fire load is large.

Visual Analogue Scale과 R(III) Nociceptive Flexion Reflex와의 상관관계

김용익(Yong Ik Kim),김상현(Sang Hyun Kim),이주철(Ju Chul Lee),전재수(Jae Soo Jeon),황경호(Kyung Ho Hwang),박욱(Wook Park) 대한통증학회 2000 The Korean Journal of Pain Vol.13 No.2

N/A Background: Pain is often measured using psychophysical scaling techniques. However, all of these methods found their limits, since they were based on the subjective sensations reported by the subjects. It is, therefore, desirable to validate psychophysical pain measures by simultaneously measuring some physiological correlate of nociception. We studied an objective method for measuring pain in human volunteer using R(III) nociceptive flexion reflex. Methods: Four different intensity of electrical stimuli between perception and 1.4 times the R(III) nociceptive flexion threshold were delivered to the sole of the feet in 8 normal volunteers. We measured the flexion reflex activity in the skin over the ipsilateral tibialis anterior muscle and subjects rated each stimulus on a visual analog scale (VAS) Results: Both R(III) nociceptive flexion reflex activity and VAS ratings showed a linear relationship with stimulus intensity and with each other in all volunteers. Conclusions: R(III) nociceptive flexion reflex elicited through electrical stimulation may used as an objective pain measurement, previsionary based on our study paradigm.

전력 시스템의 전압 붕괴에 대한 분기 이론 및 분기 제어

이용익(Yong-Ik Lee),심덕선(Duk-Sun Shim),심귀보(Kibo Sim),전홍태(Hongtae Jeon) 제어로봇시스템학회 2000 제어로봇시스템학회 합동학술대회 논문집 Vol.2000 No.3

독일연방포도 및 원예육종연구소 Geil Weilerhof의 1991년 육종연구 전망

이용익,Lee, Yong-Ik 한국주류산업협회 1991 주류산업 Vol.11 No.4