SVD 알고리즘 및 HMM을 이용한 얼굴 및 눈 패턴 검출

진경찬,김명남,신장규,손병기,조진호 경북대학교 센서기술연구소 1998 센서技術學術大會論文集 Vol.9 No.1

The studies about automatic pattern detection of the eye and face from the human image acquired by the CCD image sensor have good applicabilities in the industry, home automation, and data communication field. In general, pattern detection method consists of feature based matching and template matching. In feature based matching, the feature vector is extracted with DLM(dynamic linking matching), EBGM(elastic bunch graph matching), HMM(hidden markov model) matching and knowledge based matching using statistical characteristics. In template matching, in general, the template vector is extracted with PCA(principal component analysis). When these method applied in the face and eye detection, each method has its own merits and some disadvantage. Therefore, by combined utilization of SVD(singular value decomposition) and HMM algorithm, is expected that we can selectively make use of each methods advantage and it result in improved detection accuracy. In this paper, we proposed the method for face and eye detection, which was combined by the two algorithms, to be suitable for the high speed image processing using DSP chip or microprocessor. In the beginning, template matching was followed by a template extraction using batch SVD algorithm and then face pattern was classified and recognized by HMM algorithm which is one of feature based matching technique. Finally, eye pattern detection was performed by pattern search neural network utilizing eigeneye image.

계절 변화에 대한 초등학생의 선개념과 개념 변화 양상

장명덕,정철,정진우 한국교원대학교 과학교육연구소 2001 청람과학교육연구논총 Vol.11 No.1

이 연구는 계절 변화에 대한 초등학생의 선개념과 수업에서 나타나는 개념 변화 양상을 조사하는 것이다. 연구 대상은 인천광역시의 초등학교 5학년생 78명을 대상으로 하였다. 계절 변화에 대한 학생들의 선개념을 알아보기 위하여 그림과 글로 응답하도록 구성된 지필 검사지를 사용하였으며, 동일한 검사 문항을 이용하여 각각 수업 중의 중간 검사, 수업 후의 사후 검사, 그리고 1주일 후 지연 검사를 통하여 학생들의 개념 변화 양상을 조사하였다. 응답 결과의 분석은 3명의 본 연구자들간에 의견의 일치를 보아 분석하였다. 조사 결과, 사전 검사에서 대안 개념을 가지고 있는 일부 학생들의 경우 수업 후 또 다른 대안 개념을 형성하며, 이들이 가지고 있는 게절 변화 개념은 안정되어 있지 않은 상태로 나타났다. 또한 계절별 지구와 태양 사이의 공간 분포의 변화에서는 거리와 가열 효과가, 그리고 계절별 별자리의 변화에서는 지구의 자전 개념이 계절 변화에 대한 학생들의 올바른 개념 형성에 장애가 되는 요인으로 나타났다. This study was to investigate the preconception and phases of children's conceptual change about season through an instruction on the concept. Participants in the study were seventy-eight fifth graders in two classrooms of an elementary school located in Incheon city. Children's preconception was examined using a questionnaire, consisted of a drawing and literal explanation. The questionnaire also was used at the midterm-test, post-test, and one-week delayed-test. The results shows several findings as follows: some children (a) change their synthetic conceptions to form another synthetic conceptions through the instruction; (b) exhibit that their conceptions are unstable; and (c) are mainly influenced by distance and heating effect on the seasonal spatial distribution between the Earth and the Sun, and by the Earth's rotation on the seasonal change of constellations in acquiring the scientific concepts.

초등학생의 읽기 능력과 과학 탐구 능력 및 과학 성취도와의 관계

장명덕,정철,정진우 한국교원대학교 과학교육연구소 1999 청람과학교육연구논총 Vol.9 No.1

본 연구의 목적은 읽기 능력이 과학 탐구 능력 및 과학 성취도와 어느 정도의 관련이 있는지를 알아보는 것이다. 최근 30년간 실험실 활동과 탐구 능력은 상당한 관심을 받으며 강조된 반면, 읽기 활동과 읽기 능력(또는 독해 능력)은 과학교육분야에서 소홀히 취급되고 있는 실정이다. 그러나 글을 읽는다는 것은 단순히 글자를 해독하는 과정이 아니라 다양한 요소들이 개입되는 사고의 과정이라는 인식 하에 읽기는 최근 일부 과학교육학자들에 의해 꾸준히 연구되어지고 있다. 이러한 연구들 중 흥미로운 것은 읽기 능력과 탐구 능력 요소들간의 유사성에 대한 찬ㆍ반 논의이다. 이에 본 연구에서는 인천광역시의 초등학교 5학년 115명을 대상으로 읽기 능력, 탐구 능력 및 과학 성취도의 관계를 알아본 결과, 이 세 요소는 유의미한 상관 관계를 나타내었다. 이는 문제해결 활동으로써 과학과 관련된 글에 대한 읽기 활동을 적절히 활용한다면 학생들에게 탐구 능력 요소들을 연습할 수 있는 기회를 제공할 뿐만 아니라 과학 지식의 습득이라는 과학교육의 중요한 두 가지 목표 달성에 효과적인 방법이 될 수 있음을 시사한다. The purpose of this study was to inquiry how much elementary students' reading ability has relations with science process skills and science achievement. Generally laboratory activity and science process skills have been emphasized, on the other hand, reading activity and reading ability have been neglected by science educators for nearly 30 years. But reading a text is not simply a process of decoding printed symbols; it is a process of thinking involved manifold factors. Under this recognition, some science educators have steadily researched into reading. The interesting thing out of them is pros and cons about correspondence between science process skills and reading skills. Therefore, in order to investigate the relationships between reading ability, science process skills, and science achievement, grade 5 students (N=115) Were selected from one elementary school in Inchon and then they were required to respond to tests (which assess reading abilities, science process skills, and science achievement). The results of this study appeared to indicate that reading ability has significant relations with science process skills and science achievement. Probably, the proper using of scientific written materials, as problem-solving activity, will provide students with opportunities that they can practice science process skills and obtain the scientific knowledge.

혐기성소화에서 Aeration에 의한 수소생성에 관한 연구

이명주,김상철,장현섭,황선진 경희대학교 2005 環境硏究 論文集 Vol.14 No.-

Hydrogen gas was continuously produced by treating glucose-containing synthetic wastewater with sewage digester sludge. This research investigated the effect of aeration on biological hydrogen production in anaerobic digestion process. Aeration of 0.8, 2.5, 5, 10, 20 L-O₂/g-SS were used. After aeration, the batch reactor at 35℃ was operated on a mineral salts-glucose(20g/L). The maximum hydrogen production rate of 570 ml/L-area. was found at oxygen dosage of 5 L-O₂/g-SS and pH uncontrolled. When the reactor was controlled at pH 5.5 with 6N Noah and 4N CHI, hydrogen production rate is 3 times higher than that of the control.

釜山市 九月山의 風化物中 粘土鑛物의 特性 및 成因

黃辰淵,張明翊 부산대학교 기초과학연구소 1994 부산대학교 기초과학연구소 연구논문집 Vol.14 No.-

The various weathering products derived from andesitic rocks in the Guweol mountain area of Pusan have been studied in order to investigate the occurrence, characteristics and evolutional trend of clay minerals in the weathered rock and soil using mainly X-ray powder diffraction method. Kaolinite and halloysite are very abundant in the weathered rocks and soils derived from andersitic rocks of this area. Also, 12Å-and 14Å-minerals occur in the considerable amount. 12Å-minerals have been identified as mica/vermiculite interlayer minerals showing the 25Å basal reflection. Their crystal sizes are relatively big showing more than 10 micron in diameter. Two types of 14Å-mineral, which are vermiculite/smectite interlayer mineral and A1-vermiculite, have been observed. Kaolin minerals consist of kaolinite, 10Å and 7Å halloysite. Kaolinite relatively dominates in the strongly weathered soil of the area. In contrast with kaolinite, 12Å-and 14Å-minerals such as vermiculite/smectite and mica/vermiculite interlayer minerals tend to occur in the weakly to intermediately weathered products, Based on their occurrences, it strongly suggests that they are intermediate products in the course of the weathering process from the parent materials into the kaolin mineral.

기계적 처리와 금속촉매 오존산화에 의한 슬러지 감량화

윤상현,장현섭,이명주,황선진 경희대학교 2005 環境硏究 論文集 Vol.14 No.-

This research investigated the effect of mechanical pretreatment and ozone/catalytic oxidation on the reduction of sewage sludge. The pretreatment process was carried out to enhance sludge solubilization. The degree of solubilization was evaluated based on the DR. TS 1∼4% sludge was treated by ball mil using glass beads of 1 mm in diameter with the 50% (v/v) zircon bead loading. TS 4% showed 4 times higher solubilization efficiency than that of untreated sludge. The combination of the mechanical pretreatment and ozone/catalytic oxidation(10 mg Mn/g TS) showed higher efficiency than ozone/catalytic oxidation. At the 40% solubilization efficiency of sludge achieved by using ball mill, combination treatment showed 3 times higher than control. Ozone/catalytic oxidation improved the solid reduction effectively in the lower pH, presumably due to a high production of OH radical.

초등과학 탐구수업 지도자료의 활용 실태

신영준,장명덕,배진호,권난주,여상인,이희순,노석구 한국초등과학교육학회 2005 초등과학교육 Vol.24 No.2

In this study, we had tried to present a plan for improving the actual conditions of practical utilization of teaching material for 6th grade science developed by Ministry of Education & Human Resources Development and distributed to all elementary schools in Korea. Also we presented ways of better utilization of the teaching material after investigating the actual conditions of practical utilization. A survey was made to investigate and collect all data in the major metropolitan cities, the Kangwon, Chungcheong, Honam, and Kyeongsang area, respectively. We surveyed 316 6th grader teachers to investigate the actual conditions of distribution and utilization of teaching material as a general research. In addition, we surveyed 46 teachers to investigate the organization and content of teaching material as a particular research. The results are as follows. First, the teaching material was not approximately transmitted and kept to 6th grader teachers. Second, the utilization guide was not made. Third, it was reported that the thematic divisions of teaching material was a strong point, but the less detailed experiment manual was a weak point. Fourth, the consideration of content difficulties and simplicity was necessary to improve the material. Fifth, additional items should be included in the introductory presentation, convenience of reorganization, activity material causing learning interest, guidance of substitution experiment, and more concrete notice of experiment activity. Finally, there were positive responses of more than 4.0 point of Likert scale (1 to 5 point scale) in detail investigations of thematic items, which could have possibility that the teaching material was helpful to elementary school science field.

KS H ISO 1242 표준의 평가 : 라반딘 정유의 산값 측정

전혜림,이은지,장혜진,손현화,김건,김남선,전명숙,이동선 서울여자대학교 2010 자연과학연구논문집 Vol.22 No.-

The acid value (AV) as well as the ester value of essential oil is an important index to evaluate quality of essential oil. The official standard analytical method of KS H ISO 1242 dealing with “Essential oils - Determination of acid value” was assessed experimentally using two lavandin essential oils obtained in France as an example. One French lavandin oil sample showed the results of AV= 0.9 by both indicator method and potentiometry. Another sample showed AV = 1.9 by indicator method and AV = 1.6 by potentiometry. Latter lavandin oil sample exhibited significantly higher acid value than maximum value of 1 described in the standard. This result suggests that latter lavandin oil was contaminated, because this oil was contained in an orange juice bottle. Results of this study proved that KS H ISO 1242 could be used as a suitable scientific standard for the determination of acid value of essential oils.

Radiation Effects on the Growth Characteristics of the Auricularia auricula 'Geoni' and 'Yong-A’

Jin-Woo Lee,Eui-Yong Hong,Jeong-Heon Kim,Ju-Young Park,Soon-Jae Kwon,Chang-Hyun Jin,Youn-Jin Park,Tae-Seok Oh,Myoung-Jun Jang 한국버섯학회 2023 버섯 Vol.27 No.2

Hypoxic Preconditioned Mesenchymal Stromal Cell Therapy in a Rat Model of Renal Ischemia-reperfusion Injury: Development of Optimal Protocol to Potentiate Therapeutic Efficacy

Jang, Myoung Jin,You, Dalsan,Park, Jin Young,Kim, Kyung,Aum, Joomin,Lee, Chunwoo,Song, Geehyun,Shin, Ha Chul,Suh, Nayoung,Kim, Yong Man,Kim, Choung-Soo Korean Society for Stem Cell Research 2018 International journal of stem cells Vol.11 No.2

<P>Although previous and ongoing clinical studies have used stromal cells during renal ischemia-reperfusion injury (IRI), there is little consensus regarding the optimal protocol. We aimed to optimize the protocol for hypoxic preconditioned human bone marrow-derived mesenchymal stromal cell (HP-hBMSC) therapy in a rat model of renal IRI. We determined the optimal injection route (renal arterial, renal parenchymal, and tail venous injection), dose (low-dose: 1×10<SUP>6</SUP>, moderate-dose: 2×10<SUP>6</SUP>, and high-dose: 4×10<SUP>6</SUP>), and injection period (pre-, concurrent-, and post-IRI). During optimal injection route study, renal arterial injections significantly reduced the decreasing glomerular filtration rate (GFR), as compared to GFRs for the IRI control group, 2 and 4 days after IRI. Therapeutic effects and histological recoveries were the greatest in the group receiving renal arterial injections. During the dose finding study, high-dose injections significantly reduced the decreasing GFR, as compared to GFRs for the IRI control group, 3 days after IRI. Therapeutic effects and histological recoveries were the greatest in the high-dose injection group. While determining the optimal injection timing study, concurrent-IRI injection reduced elevated serum creatinine levels, as compared to those of the IRI control group, 1 day after IRI. Pre-IRI injection significantly reduced the decreasing GFR, as compared with GFRs for the IRI control group, 1 day after IRI. Therapeutic effects and histological recoveries were the greatest in the concurrent-IRI group. In conclusion, the concurrent-IRI administration of a high dose of HP-hBMSC via the renal artery leads to an optimal recovery of renal function after renal IRI.</P>