표정인식을 위한 PCA와 템플릿 정합을 사용한 얼굴 요소 추출

우효정, 이슬기, 김동우, 류성필, 안재형 충북대학교 산업과학기술연구소 2013 산업과학기술연구 논문집 Vol.27 No.2

This paper proposed an extracting algorithm of human facial components for the recognition of facial expressions. First face image is acquired using the Haar-like feature mask from an input image. The face image is divided into two images. One is the upper image including eye and eyebrow. The other is the lower image including mouth and jaw. The extraction of facial components, such as eye and mouth, begins getting eye image and mouth image. Then eigenfaces are produced by the PCA training process with learning images. An eigeneye and an eigenmouth are produced from eigenfaces. Result eye image is obtained by template matching the upper image with the eigeneye, and the mouth image is obtained by template matching the lower image with the eigenmouth. The simulation results show that the proposed method has superior extraction ratio than previous method.

황동ㆍ청동 주물제 조리 기구(불판)의 납 용출 특성

김동필,이효구 公州大學校 資源科學硏究所 1998 資源科學硏究論文集 Vol.6 No.-

This purpose of this study is to investigate the effect of Pb migration by changing the temperature and the leaching solution by Pb amount using Pb contained brass and bronze casting barbecue BULPANs being used at Korean restaurant. The results are as follows. 1. In the leaching experiment by water and 1∼4% acetic acid solution, asthe leaching temperature incresed from 60 to 100℃, Pb amount in the leaching solution also tended to increase. 2. In the leaching experiment by acetic acid solution, as the acetic acid concentration in the leaching solution increased from 0 to 4%, Pb amount in the resulting solution also tended to increase. 3. As acetic acid concentration in the leaching solution increased, Pb leaching amount from brass casting increased even more than from bronze casting. Howeber, even if the leaching temperature increased, Pb leaching amount ratio from brass vs. bronz casting was maintained at constant level. 4. At repetitive leaching tests, in case of brass casting, Pb amount nearly didn't change, but in case of bronze casting, it showed an irregular tendency due to the properties of Pb content in the material. 5. Pb leaching amount by pseudo-Bulgogi source solution (pH 4.5, salt concentration 3.0%) showed a similar tendency to the result by 1% acetic acid solution.

디바이스 전압제어를 통한 동적 소모 전력 관리

김형필,서효중 가톨릭대학교 자연과학연구소 2005 자연과학논문집 Vol.26 No.-

배터리의 용량이 한정된 이동기기에서는 배터리의 효율을 높이기 위한 전력 절감 기법에 관련한 기술이 중요시된다. 배터리의 용량을 증대시키기 위한 기존의 방법으로 시스템 전체의 평균 동작 전압을 감소시킴으로써 전력 소비량을 줄이는 방법이 제시되어 왔다. 이는 프로세서의 저전력 정책으로 시스템의 상태에 따라 프로세서의 주파수와 공급 전압을 조절함으로써 시스템 전체의 전력 소비를 감소시켜 결과적으로 배터리의 사용량을 증대시킨다. 본 연구에서는 현재 프로세서에만 사용되어 오던 주파수와 공급 전압의 조절을 배터리의 잔량에 따라 각 디바이스에 적용한 DPM(Dynamic Power Management)을 제시함으로써, 프로세서의 전력 관리보다 시스템 차원에서 배터리의 특성을 고려한 부가적 전력 절감 기법을 제시한다.

TGA 방법을 이용한 플라스틱과 하수·분뇨슬러지의 열분해 반응속도 연구

윤효숙,최성필,김성탁,원양수,신부영 嶺南大學校 環境問題硏究所 1997 環境硏究 Vol.16 No.2

요약문 도시 고형폐기물의 열분해 특성에 대한 기초 자료를 제시하고자 열중량분석기를 이용하여 가열속도를 실험변수로 하여 하수 및 분뇨슬러지와 5대 범용 플라스틱인 LDPE, HDPE, PP, PS 와 PVC의 열분해 반응속도인자 및 분해특성을 파악하였다. 활성화에너지는 가열속도에 상관없이 일정한 값을 나타내었으며 분해속도가 최고일때의 온도는 가열속도가 증가함에 따라 증가하였다. LDPE, HDPE, PP와 PS는 1단계 분해반응으로 350∼520 ℃에서 대부분이 완전분해되었으며, PVC는 2단계 분해반응으로 250∼550 ℃에서 분해가 진행되었다. 슬러지는 여러 단계의 분해반응으로 특정한 분해구간이 없이 전구간에 걸쳐서 분해가 진행되었다. PVC를 제외한 플라스틱은 완전분해되었으며, PVC는 약 10%의 잔류량이 있었고, 슬러지의 잔류량은 D 하수, S 하수, T 분뇨 슬러지의 순으로 43, 70, 28.5%를 나타내었다.Abstract The thermal decomposition of sewage/night soil sludge and LDPE, HDPE, PP, PS and PVC was studied by using a conventional dynamic thermogravimetric analyzer (TGA) in a flowing nitrogen environment at several heating rates between 5 ℃ and 40 ℃/min. The dynamic thermogravimetric analysis curve was analyzed to obtain the information on the kinetic parameters such as activation energy, reaction order, and Arrhenius preexponential factor. The activation energy keeps constant regardless of heating rates, and the temperature of he fastest decomposition increases with the heating rate. LDPE, HDPE, PP and PS were completely decomposed in the temperature range of 350∼520 ℃ including as the first step decomposition and PVC was decomposed in the temperature range of 250∼550 ℃ including the second step decomposition. Sludge was decomposed without specific temperature range as several decomposition step. Except of PVC, all plastics were decomposed completely. PVC keeps the remains of about 10%, and sludge keeps the remains of 43% for D sewage sludge, 70% for S sewage sludge, 28.5% for T night soil sludge.

조선시대 목판화의 매체적 특성 연구

임영길,임필효 홍익대학교 산업디자인 연구소 2002 미술디자인 논문집 Vol.- No.7

Printmaking is made as multiple copies for all ages and countries, so it is natural that printmaking is closely related to the contemporary typography, and most of the prints in the past were classified as a part of typography because they were made as illustrations in books and that is the reason many prints have been neglected in Korean history of art. However, the word "Multiple" in the modern art, means the system made as many, but limited number of originals, in other words, the tool for a communication with the masses. It seems to be necessary that we consider the characteristics of printmaking as a media in relation to the problems in modern society, such as the problem of copying, appropriation of images, originality. communication with the masses in this age of information and mass culture. Especially, we can find the way to recreate the traditional prints in modern art in relation to the media. The Printmaking in Chosun dynasty, were interposed in books as illustrations, and also used very usefully as documental records of royal events, important policies. Besides, prints were also applied in every-day lives and tools for folk beliefs by making best use of their mass-characteristics. The way of printmaking in Chosun dynasty still has many opportunities for various form of experiments in that it was the first invention for accurate copying of pictorial statement, many other arts and studies were improved depending on the informations transferring through it, Therefore, in this study, I define the concept of media to make an approach to the woodcut on Chosun dynasty, and take a look at the origin of printmaking in relation to the typographic media in chapter Ⅰ. And Ⅰsee the general flow of printmaking in Chosun dynasty in relation to the cultural and social situations, analyse them in terms of their uses to make clear their characteristics as media in chapter Ⅱ. Finally, I would like to find out the origin of the multiple art in Chosun dynasty, before the age of copying machines by applying the characteristics as media to modern age of new media. and the way to use and improve it in this computerized modern society.

압력용기의 설계기준 및 손상 평가

오환섭,정효진,박상필,손두익 한국공작기계학회 2005 한국공작기계학회 춘계학술대회논문집 Vol.2005 No.-

The damage of the pressure courage by degradation can become the reason of unexpected break down or failure accident and it is very important because safety accident, the production loss, environmental pollution, social problems are occur. Consequently The result to investigat of failure accident for domestic pressure vessel, the factor of degradation is SCC, Sorrosion, Cavity, Crack

섭취유지의 종류가 흰쥐의 혈청 및 간장의 지질성분에 미치는 영향

金君子,鄭孝淑,朴畢淑,姜晋順,鄭承鏞 慶尙大學校 1987 論文集 Vol.26 No.1

지방 산조성이 다른 수종의 유지를 흰쥐에 급이하여 혈청 및 간장중의 지질농도에 미치는 영향을 실험하여 다음과 같은 결과를 얻었다. 1. 식이섭취량과 증체량은 각 군간에 유의성이 없었다. 2. 혈청의 총 콜레스테롤 농도는 4군 (5% 라드+5% 말쥐치기름)은 높았다.HDL-콜레스테롤 농도는 각 국간에 큰 차이는 없으나 5군 (5% 라드+5% 말쥐치기름), 3군 (5% 라드+5% 콩기름)이 비교적 높았으며 총 콜레스테롤에 대한 HDL-콜레스테롤의 비율은 3군(5% 라드+5% 콩기름)이 가장 높았다. 3.간장의 총 콜레스테롤 농도는 각 군간에 큰 차이는 없으나 4군(5% 라드+5% 말쥐치기름)이 비교적 낮았으며 2군(5% 라드+5% 올리브기름)이 가장 높았다. 4. 혈청중의 중성지질 농도는 각 군간에 큰차이는 없으나 4군(5% 라드+5% 들깨기름), 5군(5% 라드+5% 말쥐치기름)이 약간 낮은 경향이었으며 인지질 농도는 3군 (5% 라드+5% 콩기름)이 비교적 낮았다. 5. 간장의 중성지질 농도는 대조군에 비하여 4군(5% 라드+5% 들깨기름), 5군 (5% 라드+5% 말쥐치기름), 2군(5% 라드+5% 올리브기름)이 비교적 낮았으며 3군(5% 라드+5% 콩기름)이 가장 높았다. 인지질 농도는 각 군간에 큰차이는 없으나 3군(5% 라드+5% 올리브기름)이 비교적 높았다. 6. 혈청 및 간장의 과산화지질 농도는는 대조군에 비하여 4군(5% 라드+5% 들깨기름),5군(5% 라드+5% 말쥐치기름)이 현저히 높았다. In order to investigate the aspect of nutritional physiology of various dietary fats and oils with different composition of fatty acids, it was experimented that the effect if dietary fats andoils on lipid concentration in serum and liver of rats. The results were as follows: 1. Body weight gain and amount of food intake were not significantly different among all groups. 2. Concentrations of total cholesterol in serum were significantly lower in group 4 (5% lard+ 5% perilla oil) and group 3 (5% lard + 5% soybean oil0 than control group(10% lard) 3. High density lipoprotein cholesterol concerntrations in serum were the highest in group 3 among all groups, the ratio of those to total cholesterol was significantly higher in group 3 and group 4 than control group. 4. Concentrations of total cholesterol in liver were remarkably lower in group 4 than any other groups. 5. Triglyceride concentrations in serum were significantly lower in group 4 and group 5 than other groups adn phosphospholipid concentrations were the lowest in griup 3 among all groups. 6. Concentrations of triglyceride and phospholipid in liver were the lowest in group 4 among all groups. 7. Concentrations of lipid peroxid in serum and liver were remarkably higher in group 4 and group 5( 5% lard +5% file fish oil) than control group.

TGA를 이용한 산화구리계 탈황제의 반응 특성 규명

이혁수,강민필,이효송,이영우 충남대학교 공업교육연구소 2001 論文集 Vol.24 No.1

Reduction and sulfidation reactivities of mixed metal oxides were investigated by using a TGA. Mixed metal oxides consisted of CuO as the main active material, SiO₂ as the support material and both MoO₃ and Fe₂O₃ as the additives. Each material was chosen based on the literature survey. CS (CuO/SiO₂) sorbents were prepared to investigate the effect of support material, and consisted of various composition of CuO and SiO₂. CMS (CuO-MoO₃/SiO₂) and CFS (CuO-Fe₂O₃/SiO₂) sorbents were prepared to investigate the effect of additives and consisted of various composition of CuO and additive. In CMS and CFS sorbents, a support material was 25wt% SiO₂ because the previous study showed that 25wt% SiO₂ was needed to maintain the activity in multicycle experiment. Simple physical mixing method was chosen as the sorbent preparation method. Chatterjee-Conrad method was used to evaluate activation energies of sorbents from TGA data. The activation energy of CS sorbents decreased in reduction reaction and increased in sulfidation reaction as SiO₂ content increased. Fe₂O₃ was more favorable than MoO₃ as an additive material in terms of reduction reaction rate.

시간지연 제어기법을 이용한 유연한 로봇 팔의 위치 제어

김동기,강이석,신효필 忠南大學校 産業技術硏究所 1995 산업기술연구논문집 Vol.10 No.2

A TDC(Time Delay Control) theory is applied to the the position control problems of flexible robot manipulators subjected to unknown dynamics and distrurbances. One link flexible manipulator system with tip mass is represented as a simple spring-mass-damper syseem and AC servo motor is used as the actuator. Based on the system model, the TDC is designed, and the PI-controller is also designed for comparison. The control performance of TDC is evaluated through a series of simulations and experiments. The simulational and wxperimental results show that the TDC is much robust than the PI-controller to the unknown dynamics and disturbances.

회전하는 유연한 조작기의 진동 해석

김승호,하영균,정승호,박영필,황효성 연세대학교 산업기술연구소 1985 논문집 Vol.17 No.2

An analytical and experimental investigation is made to the dynamic response of a cantilever with a tip mass that models some of the basic phenomena involved in the response of a flexible manipulator with a tip mass on its free end under the given rotating motion. The system equation is derived from the Hamilton's principle on the basis of the Euler-Bernoulli hypothesis and an approximate solution is obtained from modal analysis using Galerkin's method for the vibration response of the system subjected to a sudden stop after an impulsive rotation. Experiment was performed to verify the validity of the theoretical analysis. Results are given for the vibration amplitude of the free end with respect to tip mass ratio, non-dimensionalized rotating velocity, rotating angle and non-dimensionalized hub length. The rotating condition to minimize the vibration amplitude of the free end can be determined for the given basic parameters.