• 한국멀티미디어학회논문지
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• 제24권4호
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• pp.528-537
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• 2021

Face recognition has gained significant notice because of its application in many businesses: security, healthcare, and marketing. In this paper, we will present the recognition method using the combination of correlation filters (CF) and Support Vector Machine (SVM). Firstly, we evaluate the performance and compared four different correlation filters: minimum average correlation energy (MACE), maximum average correlation height (MACH), unconstrained minimum average correlation energy (UMACE), and optimal-tradeoff (OT). Secondly, we propose the machine learning approach by using the OT correlation filter for features extraction and SVM for classification. The numerical results on National Cheng Kung University (NCKU) and Pointing'04 face database show that the proposed method OT-SVM gets higher accuracy in face recognition compared to other machine learning methods. Our approach doesn't require graphics card to train the image. As a result, it could run well on a low hardware system like an embedded system.

• 한국음향학회지
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• 제27권5호
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• pp.252-255
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• 2008

본 논문에서는 성별 인식 시스템의 성능향상을 위해 변별적 가중치 학습 (discriminative weight training) 기반의 최적화된 SVM (support vector machine)을 제안한다. MCE (minimum classification error)방법을 도입하여, 각각의 MFCC (mel-frequency cepstral coefficients) 특징벡터 차수별로 다른 가중치를 가지는 SVM을 제안한다. 제안된 알고리즘은 기존의 동일 가중치를 가지는 SVM 기반의 성별인식 시스템과 비교하였으며, 우수한 성능을 보인다.

• 한국지구과학회지
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• 제30권7호
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• pp.834-844
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• 2009

본 연구에서는 최소모델영역 연산자를 MT(magnetotelluric) 2차원 역산 알고리듬에 적용하여 역산 해의 대비를 향상시키고자 하였다. 이를 위하여 creeping법에 기초한 최소자승 역산에 최소모델영역 연산자를 수치적으로 유도하여 알고리듬을 구현하였으며, 공간함수로서의 평활화 상수를 도입한 ACB (Active Constraint Balancing) 법을 동시에 적용하여 최소모델영역 연산자를 이용할 때 단점으로 지적되었던 역산 해의 안정성을 향상시켰다. 고립된 단일 이상체 모델에 대한 수치실험을 통하여 MT 역산에 있어서 최소영역 연산자의 효과를 기존의 2차 미분연산자와 비교 분석하여 MT 역산에서의 특징을 고찰하였다. 또한 다중 이상체 모델에 대한 실험을 통하여 Occam 역산과 비교하여 최소모델영역 연산자를 이용한 역산 해의 특징을 비교 분석하였으며 현장 자료에의 적용을 통하여 그 적용성을 살펴보았다.

• 한국공간정보시스템학회 논문지
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• 제8권2호
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• pp.39-52
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• 2006

최근 들어 이동 객체의 이력 (history) 데이타에서 이동 객체의 이동 패턴, 즉 연속되는 시간 영역에서 반복적으로 발생되는 공간 이동 경로와 같은 다양한 지식을 추출하여 활용하는 응용 서비스의 활용성이 점점 증대되고 있다. 그러나 기존의 이동 패턴 추출 방법은 최소지지도(minimum support)가 낮은 경우에 많은 수의 후보 이동 패턴이 생성되고 이로 인하여 수행 시간과 소요 메모리가 급격히 증가하게 되는 단점이 있다. 본 논문에서는 대용량의 시공간 데이타 집합으로부터 이동 객체의 이동 패턴을 효율적으로 추출하기 위한 STMPE(Spatio-Temporal Moving Pattern Extracting) 알고리즘을 제안한다. STMPE 알고리즘은 시공간 데이타를 일반화시킴으로서 메모리 사용량을 최소화할 수 있으며, 단기 이동 패턴을 작성하여 유지하기 때문에 데이타베이스 스캔 횟수를 최소화할 수 있다. STMPE 알고리즘은 모든 부분에서 시간 정보를 갖는 다른 시공간 이동 패턴 추출 알고리즘보다 최소지지도가 낮아질수록, 이동 객체의 수가 증가할수록, 시간 분할 횟수가 많아질수록 더욱 뛰어난 성능을 보였다.

• 대한방사선치료학회지
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• 제14권1호
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• pp.155-164
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• 2002

This descriptive correlation study was undertaken in order to investigate the relationship of family support and personality with quality of life in patients receiving radiotherapy for breast cancer and to provide basic data to help them improve a better quality of life. This subjects for this study were 74 out-patients undergoing a radiation therapy at C hospital in Kwang-Ju. The data were obtained using a convenience sampling technique. The tool of this study were Ro's qualify of life scale, Kang's family support scale and Wallston & others health locus of control scale. The data were analyzed using a SAS program for percentage, mean, standard deviation, Pearson Correlation Coefficient, GLM. The results were as fellows: 1. The total average score of the quality of life of the subjects was 137.22 (minimum score 38-maximum score 227), item mean score(range 1-5) was 3.15. The total average score of the family support of the subjects was 40.38(minimum score 21-maximum score 47), item mean score(range 1-5) was 3.69. The total average score of health locus of control of the subjects was 42.47(minimum score 28-maximum score 59), item mean score(range 1-6 was 3.69. 2. The results of the analysis of the relationship between the quality of life scores and the health locus of control were as follows : the total average score of the qualify of life of internal locus of control scale was 133.50, he total average score of the quality of life of external locus of control scale was 138.41. 3. There was positive correlation between the health locus of control and the quality of life(r=0.0722, p=0.5413). 4. There were significant positive correlation between family support and quality of life(r=0.2328, p=0.0399). The results of the analysis of the relationship between the each factor in the quality of life scores and family support were as fellows : There were significant difference between the self esteem factor(r=0.2974, p=0.0124), relationship with family factor(r=0.2657, p=0.0241)

• 해양환경안전학회지
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• 제27권1호
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• pp.161-171
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• 2021

본 연구에서는 20,000 톤급 해양플랜트 상부구조물(Topside)의 플로트오버 설치작업을 위해 개발된 수동형 갑판 지지 프레임(Deck support frame)의 구조설계에 대해 다양한 실험계획법을 이용한 최소중량설계와 민감도 평가의 비교연구를 수행하였다. 수동형 갑판 지지 프레임의 주요 구조부재의 두께 치수 변수는 설계인자로 고려하였고, 응답치는 중량과 강도성능으로 선정하였다. 최소중량설계와 민감도 평가의 비교연구에 사용한 실험계획법은 직교배열설계법, Box-Behnken 설계법, 그리고 Latin hypercube 설계법이다. 실험계획법의 설계공간 탐색의 근사화 성능을 평가하기 위해 반응표면법을 각 실험계획법 별로 생성하여 근사화 정확도 특성을 검토하였다. 또한 최소중량설계를 위해 최상 설계안의 결과로 부터 실험계획법의 특성에 따른 수치계산 비용, 중량감소 효과 등을 평가하였다. 수동형 갑판 지지 프레임의 구조설계에 대해 Box-Behnken 설계법이 가장 적합한 설계 결과를 나타내었다.

• Spatial Information Research
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• 제21권2호
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• pp.85-97
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• 2013

공간적 의사결정지원시스템을 이용하여 합리적 의사결정을 성공적으로 이끌어내기 위해서는 오랜 기간 축적된 사람, 건물, 토지, 사업체 등에 대한 공간정보가 필요하다. 해외에서는 공간의 최소단위를 정의하고 이 기반으로 정보를 구축하여 공간적 의사결정서비스에 활용하고 있다. 이러한 목적으로 우리나라에서도 국가기초구역이 고시되었지만 국가기초구역의 활용도를 높이기 위해서는 속성정보의 구축이 미비한 실정이다. 본 연구는 국가기초구역단위 공간데이터 축적을 통해 국가기초구역기반 의사결정지원시스템을 구축하는 전략제안을 목표로 한다. 전략은 정보시스템 구성요소에 맞도록 제도부문, 데이터 및 시스템 부문, 서비스 부문으로 나누어 제시되었으며, 이를 통해 국가의 최소 공간단위로서 국가기초구역의 역할이 더욱 견고해질 것으로 기대한다.

• 가정과삶의질연구
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• 제23권2호
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• pp.11-22
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• 2005

The purpose of this study is 1) to clarify that the house is no long the safe place through the cases of the senior safety accidents and to argue the need for housing repair and 2) to present the minimum standards for housing repair by comparing the cases here as well as the abroad and to back up the standards with the current senior housing environment 300 people at least 60 years old living in Seoul$\cdot$Metropolitan area were interviewed using the structured questionnaire. As the result, the following conclusions were made: 1. There was high accident rates of the senior residents due to physical deficits within the house, causing excessive medical cost and decreased housing satisfaction. This problem can be sufficiently prevented by housing repair which can not only solve the safety problem but also support self sufficient living for the senior residents. 2. Proper housing repair required the architectural know how as well as the expertise knowledge of the physical characteristics of the senior people. Therefore, it is essential to secure the professional (i.e., occupational therapist) who can analyze the needs of the senior residents and evaluate and/or predict the obstacles during repair. Furthermore, development and distribution of the standardized manual are also needed. 3. The minimum standard for housing repair could be approached in view of 'barrier-free' concept. First, the bumps should be removed, slippery prevented, and safety grab-bar installed for safety. Second, the entrance should be widened and the bathroom and kitchen restructured to support for the senior residents' self sufficiency. To make housing repair policy more efficient, the legal basis is required. It can be incorporated into the existing senior citizens 'Welfare Act' or the 'Senior Residents Medical Insurance' which will be effective starting in 2007.

• 가정간호학회지
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• 제4권
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• pp.76-85
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• 1997

In modern society, the human average life span has been prolonged due to medical benefits and changes in society, which results in the rapid and world -wide increase in the population of elderly. Consequently, the field of nursing science, as well as the field of many other discipline, has shown increasing interests in issues on the elderly. In addition, to improve the quality of life for elderiy people a great deal of effort has been made. The purpose of our study is to analyze the correlation between family support and quality of life in order to develop basic data for nursing interventions to maintain life satisfaction of the elderly. The sample consists of 108 subjects residing at home whose ages are over 65 years old. The data has been collected, from November 11, 1996 to November 23, 1996, through interviewing the elderly using a questionnarie. For the family supoort we used two: 1) the 5 - point Likert scale questionnarie developed by Gallo and Warren (Family support I) and 2) the 5-point Likert scale developed by H. S. Kang(Family support II), and for the quality of life we used the 3 - point likert scale questionnarie developed by Choi, Young Hee. For data analysis we used percentages, means, Pearson Correlation Coefficient and ANOVA. The results of our study are as follows: 1. For perceived family support I & II, the minimum score is 12 & 19, the maximum score is 32 & 46, the mean score is 24.49 & 34.90, respectively. 2. For Quality of life, the minimum score is 13, the maximum score is 39, the mean score is 28.61. 3. there is a very strong correlation between the perceived family support of the subjects and Quality of life (for I r=0.35047, p<.001 and for II r= 0.60558, p<.001). 4. The relationship between the general characteristics of the elderly and our two variables. family support and Quality of life, is as follows: 1) According to age(for II F=5.32, p<.01), the amount of monthly pocket money(for II F= 3.52, p<.05), inmate(for I F=2.93, p<.05, for II F=2.84, p<.05), economics(for I F=8.99, p<.01. for II F=7.51. p<.01), supporter(for I F=4.01. p<.01. for II F=3.43, p<.01), there is a statistically significant difference in family support. 2) According to the amount of monthly pocket money(F=6.69, p<.01), inmate(F=2.24, p<.05), economics(F=15.38, p<.01), there is a statistically significant difference in Quality of life. In conclusion, it can be said that the family support is an important variable to the Quality of the elderly life.

• ETRI Journal
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• 제35권3호
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• pp.406-413
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• 2013

In this paper, an orthogonal frequency division multiple access (OFDMA)-based minimum end-to-end delay (MED) distributed routing scheme for mobile backhaul wireless mesh networks is proposed. The proposed scheme selects routing paths based on OFDMA subcarrier synchronization control, subcarrier availability, and delay. In the proposed scheme, OFDMA is used to transmit frames between mesh routers using type-I hybrid automatic repeat request over multipath Rayleigh fading channels. Compared with other distributed routing algorithms, such as most forward within radius R, farthest neighbor routing, nearest neighbor routing, and nearest with forwarding progress, simulation results show that the proposed MED routing can reduce end-to-end delay and support highly reliable routing using only local information of neighbor nodes.