신뢰성을 고려한 광통신 네트워크 설계를 위한 유전자 알고리즘

이재욱,김종률,박월선 東西大學校 2001 동서논문집 Vol.7 No.-

Increasing attention is being recently devoted to various problems inherent in the topological design of destributed telecommunication networks. In the distributed telecommunication networking, the topological structure of these networks is based on a single central office (exchanger), a number of multiplexing centers, and a lot of users. Especially, considering the high cost of the fiber optic cable that is used to connect the between centers and the between center and users, the network architecture is composed of a spanning tree. The optimization problem is reduced to choose the number and locations of the multiplexing centers, with network reliability constraints. Recenlly, genetic algorithms (GAs) have got a great advancement in related research fields, such as network optimization problem, combinatorial optimization, multiobjective optimization, and so on, and have received a great deal of attention about its ability as optimization techniques for many real-world problems. In this paper, a GA approach is presented for network topology design of wide-band multiplexed networks, considering the network reliability related to the probability of failures. We also employ the Pru˝fer number and clustering string in order to represent chromosomes. Finally, we get some experiments in order to certify the Quality of the network designs obtained by using proposed GA.

개선된 MRME 알고리즘을 이용한 H.264 움직임 추정기 설계 및 FPGA 검증

진군선,강진아,임재윤 제주대학교 공과대학 첨단기술연구소 2004 尖端技術硏究所論文集 Vol.15 No.2

This paper presents an architectural enhancement to reduce the data load of the Multi-Resolution motion estimation. Our approch is based on eliminating unnecessary data load using memory reuse. New hardware architecture for integer-pel ME(motion estimation) dedicated to H.264/AVC is proposed. The proposed architecture supports all 7 modes (16x16, 16x8, 8x16, 8x8, 8x4, 4x8, and 4x4) for variable block size ME. The features of our design are 2-D PE(processing element) array and SAD merging scheme. A pipelined and shared datapath architecture for motion estimation unit are designed to improve the system performance at the reduced hardware complexity.

병원건축 길찾기 요소의 중요도 분석에 관한 연구 : 'A'종합병원 외래진료부를 중심으로

윤지선,박재승 한국의료복지시설학회 2008 의료·복지 건축 Vol.14 No.3

Upon reviewing the tendency of the large-scale hospital buildings constructed so far, we may well know that the architectural space of the hospital buildings has been designed for users' conveniences in terms of functional elements fulfilled, efficiency, uniform colors and lighting, which means that patients may well feel difficult to find their ways in the hospital. The result may be that the patients who are weak mentally and physically feel uneasy or tensed when they wander in the hospital, which may lead to their increased physical fatigue, higher blood pressure or other harmful effects. Thus, patients' way-finding emerges as a new design challenge for the hospital building. The purpose of this study was to define the environmental variables and factors affecting patients' way-finding in the hospital and thereby, determine the correlations between the variables/factors and way-finding to provide for some framework of analysis useful to solutions of patients' way-finding problems, while identifying the causes for difficulty of their way-finding due to differences of perception between hospital building designer and user groups.

하이브리드 유전자 알고리즘을 이용한 다목적 신뢰성 설계

김종률,박월선,이재욱 東西大學校 2001 동서논문집 Vol.7 No.-

A bicriteria reliability apportionment problem for a system consisting n subsystems with time-dependent reliability is manipulated in this paper. This reliability design problem with two objectives determines the optimum level of component reliability and the number of redundant components at each subsystem. The problem is formulated as a bicriteria nonlinear mixed integer programming problem, subject to several design constraints. Also, a hybrid genetic algorithm is used in this paper to find an optimal or near optimal solution and we propose the method which search the Pareto solutions of bicriteria reliability apportionment problems. Furthermore, numerical experiments are illustrated to demonstrate the efficiency of the proposed method.

두경부 마사지가 중환자실 환자의 수면과 불안에 미치는 효과

김미용,전선영,송윤희,최은진,김재희,김미성,주명순,김남선 병원간호사회 2006 임상간호연구 Vol.11 No.2

Purpose: This study was to apply head and neck massage to patients in intensive care unit and to inventigate the effect of that massage on sleep and state anxiety. Method: The subjects in this study were 27 patients who were admitted in medical intensive care unit. The study was performed from June thru September of 2005 on the One-group pretest-posttest design and the sleep, state anxiety of the subjects were measured before and after head and neck massage. For data analysis, paired t-test and Pearson correlation coefficient were utilized. Result: The first hypothesis that the subjects might have a better sleep after being exposed to head and neck massage was accepted. The second hypothesis that the subjects might feel less state anxiety afrer being exposed to head and neck massage was accepted. The third hypothesis that the sleep of the ICU patients maight be correlated to their anxiety was accepted, as there appeared correlation between their sleep and anxiety. Conclusion: Head and neck massage is identified as one of independent nursing interwentions to improve the sleep of ICU patients and ease their anxiety, and it is necessary to apply it to clinical practices.

저칼슘식이 생쥐 하악골에서 파골세포의 Tartrate저항성 산성인산분해효소 활성에 대한 세포화학적 연구

박은주,임도선,김현만,고재승 대한구강해부학회 1994 대한구강해부학회지 Vol.18 No.1

The present study was carried out to exanine the morphological changes and TRACP (Tartrate resistant acid phosphatase) activity in the resorption of mandibular bones of mouses resulted, established by low calcium diet. Mice were divided into two groups; one was the calcein group for fluorescent microscopy, the other was the non-calcein group for light and electron microscopy. After calcein injection, mice(ICR) were fed either a low calcium diet (0.01% Ca, 0.75% P) or control diet (0.1% Ca. 0.75% P). Non-calcein group were also fed a low calcium diet or control diet. Mice were sacrificed on 3, 7 and 14 days. For fluorescent microscopy study, fixed undecalcified alveolar bones were embedded in Epon 812, and ground sectioned to study the new bone formation after calcein injection. For the TRACP histochemical study, fixed decalcified alveolar bones were incubated in p-NPP (p-nitrophenyl phosphate) media. For the transmission electron microscopic study, incubated alveolar bone were post fixed in OsO_(4), embedded with Epon 812 for the study of TRACP localzation and activity. The observed results were as follows. 1. Low calcium diet induced bone resorption in buccal and lingual sides of alveolar bone, while the lingual side of alveolar bone was not resorbed in the control group. Bone resorption increased over the period of low calcium diet. 2. The alveolar bone proper of the lingual alveolar bone continued to deposit new bone of the periodontal side even after the low calcium diet. 3. After low calcium diet TRACP activity increased in the cytoplasm of osteoclast, extracellular ruffled border. TRACP activity was also found at the eroded bone matrix after bone resorption, and in the cytoplasm of detached osteoclast. In the immature osteoclast enzyme activity was confined in rER. No enzyme activity was found in the osteoblast.

한국인 6-17세 아동의 성장과 발육에 관한 준종단적 연구 : PART Ⅲ : GROWTH CHANGE OF CRANIOFACIAL HARD TISSUE 제 3 세부 과제 : 두개 및 안면 경조직의 성장변화

황충주,길재경,임선아 대한치과교정학회 1996 대한치과교정학회지 Vol.26 No.5

교정 환자들은 성장과 발육을 하는 개체이므로 교정치료의 시기 선택은 가장 어렵고 중요한 요소이며, 측모두부방사선 사진의 개발에 따라 안면 성장의 양상과 연령증가에 따른 성장 변화량은 성장 예측 등의 교정적 분야에 유용하게 이용되어 왔다. 이에 6세에서 17세까지의 한국인 남여 아동 각 연령군에서의 두개 안면부의 경조직 계측치 평균과 신장, 체중과의 연관성을 파악하고자 하였다. 교정치료를 받은적이 없고, 성장과 발육에 장애가 없는 6세에서 17세까지의 소년 409명, 소녀437명을 연구대상으로 만 3년간 두부방사선 사진을 체득하여 경조직 분석을 Burstone의 COGS논문에 기초하여 두개저, 상악골과 하악골, 수직 계측, 수평 계측, 상하악 기저골 관꼐 및 치성 계측의 6개 부분으로 나누어 성장과 의 관계 및 키와 몸무게와의 관계를 연구한 바 다음과 같은 결론을 얻었다. 결 론 1. 두개저 계측에서 n-Ar(FH), N-Ba(FH)의 최대 성장 증가량은 남녀 모두 체중과 신장의 최대 증가량을 나타내는 연령과 일치한다. 그 외의 항목은 일정 증가 양상을 보이고 있으나 큰 증가를 보이지 않고 있어 두개저의 성장은 초기에 거의 완성됨을 알 수 있었다. 2. Gonial angle은 남녀 모두에서 성장과 함께 점차 감소하였다. 3. ANS-Me(L)보다 N-ANS(L)가 더 많은 성장량을 보이며 안면 형태에 많은 영향을 줌을 알 수 있었다. 4. N-A-Pog은 연령증가와 더불어 감소하며 이는 하악골의 성장이 상악골의 성장량보다 빠르고 많았다. 5. 상하악 기저골 관계에서 Y-axis의 길이는 증가하지만 각도는 일정하게 유지되어 하악골은 두개저에 대한 일정방향으로 성장하였다. 6. 영구치 맹출과 더불어 Interincisal angle은 감소하였다. Orthodontic patients are individuals that grow and develop ; therefore selection of the proper time for orthodontic treatment is considered to be one of most difficult and yet difficult factor. Since the development of cephalometric X-ray, amount and pattern of craniofacial growth change with aging could be predicted and be came useful in the process of orthodontic treatment. The relationship between the mean values of cephalometric measurements and body height and weight was studied among the groups(boys and girls) of Korean children from the ages 6-years to 17-years. 409 boys and 437 girls with no abnormality in growth and development and no history of orthodontic treatment from the ages of 6 years to 17 years were chosen as subjects : Cephaloment X-ray were taken for 3 years and hard tissue analysis based on Burstone`s COGs, which was devided into measurements of 6 parts(Cranial base, Maxillar and Mandible, Dental measurements).The relationship between craniofacial growth and height & weight was studied. The following conclusions were obtained; 1. The maximum growth in the measurements of cranial base, N-Ar(FH), N-Ba(FH) corresponded with the age with the maximum increase in body height & weight in both boys and girls. 2. Gonial angle gradually decreased with aging in both boys and girls. 3. N-ANS(L) showed greater amount of growth than ANS-Ne(L), and this had greater influence on facial profile. 4. N-A-Pog0 decreased with aging, and mandibular growth exceeded maxillary growth in amount and rate. 5. Length of Y-axis increased, but Y-axis to FH plane remained constant. This show that mandible grows at a constant angulation to cranial base. 6. As permanent teeth erupt, interincisal angle decreased.

The Effect of Coolant Boiling on the Molten Metal Pool Heat Transfer with Local Solidification

Cho, Jea-Seon,Kune Y. Suh,Chung, Chang-Hyun,Park, Rae-Joon,Kim, Sang-Baik Korean Nuclear Society 2000 Nuclear Engineering and Technology Vol.32 No.1

This study is concerned with the experimental test and numerical analysis of the heat transfer and solidification of the molten metal pool with overlying coolant with boiling. In the test, the metal pool is heated from the bottom surface and coolant is injected onto the molten metal pool. Experiments were performed by changing the test section bottom surface temperature of the metal layer and the coolant injection rate. The two-phase boiling coolant experimental results are compared against the dry test data without coolant or solidification of the molten metal pool, and against the crust formation experiment with subcooled coolant. Also, a numerical analysis is performed to check on the measured data. The numerical program is developed using the enthalpy method, the finite volume method and the SIMPLER algorithm. The experimental results of the heat transfer show general agreement with the calculated values. The present empirical test and numerical results of the heat transfer on the molten metal pool are apparently higher than those without coolant boiling. This is probably because this experiment was performed in concurrence of solidification in the molten metal pool and the rapid boiling of the coolant. The other experiments were performed without coolant boiling and the correlation was developed for the pure molten metal without phase change.

식물이미지를 이용한 스마트폰 케이스디자인 연구 - 디지털프린팅기법을 중심으로 -

고선미(Go, Seon-Mi), 박재연(Park, Jea-yeon) 조선대학교 조형미술연구소 2012 조형미술논문집 Vol.12 No.1

최근 첨단기술의 급진적인 성장으로 인하여 스마트폰과 태블릿 PC등의 정보기기들이 등장하고 사용화 됨에 따라 자연과 조화를 이루며 살아가는 우리는 스마트 에코 제품을 탄생시켰으며 소비자들이 제품에 대해 기대하는 가치수준 또한 점차적으로 상승하게 되면서 이제는 제품의 효율성, 성능만이 아닌 디자인, 소재, 스토리 등 다양한 감각적, 감성적인 제품을 원하는 소비자층이 점차 확대되고 있다. 따라서 자연은 현시대에 가장 효과적인 소재이며, 이러한 자연을 다양한 방법으로 표현하는 것은 지속적으로 연구해야 할 중요한 과제이다. 이에 본 연구의 목적은 자연식물 중 멸종위기의 식물을 모티브로 단순화과정을 거쳐 텍스타일디자인을 개발하여 스마트폰 케이스를 제작하는데 있으며 멸종위기 식물은 환경문제라는 사회적 공감대형성과 풍부한 미적요소를 가지고 있어 표현대상이 되기에 충분하였다. 본 연구에서는 급변하는 사회, 스마트화 되어가는 디지털사회에서 멸종위기 식물을 컨셉으로 환경 친화적인 원단을 소재로 제작될 스마트폰 케이스는 지구보존과 건강한 생활방식 지향, 심신의 풍요로움을 표현하고자 하였다. 본 논문은 스마트폰 케이스에 대한 배경지식에 대해 이해하고 제작기법인 DTP(Digital Textile Printing)에 대한 이론적 고찰과 스마트폰 케이스에 대한 시장조사를 통한 케이스 유형과 스타일을 통해 식물이미지를 이용한 스마트폰 케이스 제작의 방향성을 제시하였다. 이와 같이 스마트폰과 에코라는 키워드는 스마트 에코시대라고 표현하기에 적합하며 식물이미지를 이용한 스마트폰 케이스가 일반인들의 그린마인드 확산에 긍정적 효과를 줄 수 있는 역할을 할 수 있기를 기대해본다. Keywords : 식물이미지, 디지털프린팅 기법, 스마트폰, 케이스디자인 Plant Image, Digital Printing Technique, Smartphone, Case Design

자수 기법을 활용한 브로치 디자인 연구

고선미(Go, Seon-Mi), 박재연(Pack, Jea-yeon) 조선대학교 조형미술연구소 2012 조형미술논문집 Vol.12 No.2

시대의 흐름에 따라 끊임없이 디자인의 초점이 변화하고 있는 가운데 소비자의 제품가치 추구와 개성을 존중하는 패션문화도 나날이 발전해 가고 있다. 섬산련, '한국 패션유통트렌드 2012' 세미나 개최, 아시아경제, 2012-08-28 자수 또한 시대적 요구와 상황에 의해 변화되어 왔으며 국제화와 정보화 그리고 첨단 기술이 발달한 현대사회에서 소비자들은 감성과 가치를 중시하는 상징적 소비를 원하며 이런 감성적 욕구 충족제로서 Handicraft style이 트렌드로 떠오르고 있다. Handicraft style은 현재 패션트렌드의 중요한 역할을 하고 있으며 직접 손으로 만든 듯 인간적이면서 독특한 매력으로, 일반적으로 디자인의 포인트로 사용되어지거나 특징적 디테일로 사용되는 경우가 많다. 특히 자수 기법은 2012 f/w 트렌드 중 하나로 자수 기법을 활용한 제품들이 많이 출시되어지고 있다. 브로치는 예전과 달리 자신의 개성을 표현하는 매우 중요한 수단이며 반지나 목걸이처럼 제한된 형태를 이루는 것과는 달리 제작 시 중량감 외의 제한이 없는 장신구이다. 또한 브로치는 포인트 적인 느낌과 특징적 디테일을 표현하기에 용이하며 이러한 이유로 본 논문에서는 자수기법을 활용한 브로치를 제작하고자 한다. 트렌드 분석을 배경으로 제작함으로써 자수의 기존 개념과 표현을 탈피한 보다 창조적인 조형예술로서 발전 가능성을 넓히고, 다양한 활동 범위의 확대를 기대해본다. Keyboards : 브로치 디자인, 자수 기법 Broach Design, Embroidery Technique