• 한국IT서비스학회지
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• 제14권4호
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• pp.121-135
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• 2015

Ensemble classification is to utilize multiple classifiers instead of using a single classifier. Recently ensemble classifiers have attracted much attention in data mining community. Ensemble learning techniques has been proved to be very useful for improving the prediction accuracy. Bagging, boosting and random subspace are the most popular ensemble methods. In random subspace, each base classifier is trained on a randomly chosen feature subspace of the original feature space. The outputs of different base classifiers are aggregated together usually by a simple majority vote. In this study, we applied the random subspace method to the bankruptcy problem. Moreover, we proposed a method for optimizing the random subspace ensemble. The genetic algorithm was used to optimize classifier subset of random subspace ensemble for bankruptcy prediction. This paper applied the proposed genetic algorithm based random subspace ensemble model to the bankruptcy prediction problem using a real data set and compared it with other models. Experimental results showed the proposed model outperformed the other models.

• 한국식품영양학회지
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• 제31권3호
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• pp.355-366
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• 2018

The aim of this study is to investigate the awareness and satisfaction level of school meal services by elementary school students and their parents. Approximately 97.2% of student-subjects have agreed on the necessity of a free meal service for school lunch; 44.3% of student-subjects voiced the need to provide free meal services in order to eliminate discrimination of low-income students. Over one-third of student-subjects (36.7%) cited nutrition as the main benefit of providing a free meal service. The majority of parent-subjects (95.1%) have recognized the need for a free meal service in school; approximately 37.3% of parent-subjects responded to need the free meal service in order to eliminate the discrimination of impoverished students. Both student- and parent-subjects expressed a high level of satisfaction with the quality of ingredients and the type of soup/nutrition provided. Student-subjects insisted on better food hygiene and a new menu, but cited the noisy cafeteria as a problem associated with school meal services. In addition, approximately 56.5% of student-subjects responded to the need for nutritional education in school. Parent-subjects were primarily concerned with hygiene regarding the preparation of school meal services, noting the temperature of foods as the biggest problem in school meal services. The majority of parent-subjects (88.1%) responded to the need for the nutritional education in school. Results of this survey indicate that school meal services can be improved by increasing menu options and increasing food hygiene.

• 대한가정학회지
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• 제38권3호
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• pp.85-97
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• 2000

The goal of this study is mainly to improve the quality of life for the elderly by understanding the actual condition of the home management which includes their family relationship, family finance, and household work carried out in their domestic lives and diagnosing problems possibly restated from the condition. The result includes the following. The characteristics of rural elderly living alone: They have lived in rural area since their marriage which is over 40 years long in average, The tend to be satisfied with living apart themselves. The majority of the families are the first son in their family. In home management regard: First, in family relationship, the way the elderly in their nuclear family state communicate with their spouse is limited, and they hardly speaks together. So it is encouraged for couples to forge their own specific relationship and to plan for their odd age in their younger age. Also, they tend to be satisfied with living separated from their children, but at the same time, the closer they live in distance from their children, the more often they meet their children as well as they talk on the phone. They especially depend on their first son for offerings for ancestors and matters to occur after their death, while they get emotional support from daughters. Second, in family finance, their income varies in range from 200,000 to 3,000,000 won. In the majority f the famines, the wives are in charge of finance. The cost of living is mainly spent on flood, clothing, and housing, or the cost of offerings for ancestors if they are the head family. Third, Meanwhile, the housewives under 70 years old are positive about household work and tend to consider it pleasant for their children and their husband. Generally, the older they are, the more they dislike household labor. For example, food preparation is especially considered a major problem. Community dinning rooms, food delivery service, volunteers, and home helper and neighborhood could be help.

• 한국식생활문화학회지
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• 제23권6호
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• pp.737-747
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• 2008

This study was conducted to investigate the perception and understanding parents had regarding environment friendly agricultural products being used for school foodservice. A trained practitioner surveyed 221 parents of children at elementary schools in Daejeon using a questionnaire, after which the resulting data were analyzed by a Chi-square test. Overall, the parent's responses regarding the foodservice were positive. However, most of the parents do not participate (65%) in the school foodservice if they work, and those that do participate primarily work as meal service aides (58.1%). Parents indicated that the work of urgent field of inspection on food materials (69.9%), and the reason of an agreement (98.2%) for them were the students' health (68.4%). In addition, most parents were positive about the possibility of replacing foods used in the school with environment friendly products (51.6%) and felt that the government should pay the additional expense associated with their replacement. Furthermore, the majority of the parent's surveyed felt that children should be supplied with vegetables (54.9%) purchased directly from farms. The parents' satisfaction with the meal service (25.1%) was lower than that of the students (54.1%). The reason for the satisfaction reported by the parents was concern regarding the health of their children (53.3%). In addition, the majority of the parents (47.3%) responded that environment friendly agricultural products differ from general agricultural products because insecticides and fertilizer were not used. The main objection parents had to using environment friendly products was their cost (59.1%), and most parents felt that a realistic solution to this problem was unified purchase (41.4%). Besides, a problem when replacing with them was the expensive price (38.1%) and true or false (37.7%), and the students' satisfaction (59.5%) was selected the most in an effect of using them, diversity of the product (39.1%) and price reduction (32.6%) for a solution of the increase of using them.

• 패션비즈니스
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• 제10권4호
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• pp.130-139
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• 2006

This study was conducted to survey and analyze the preference, and acceptance of smart clothing to the consumers with different age. A questionnaire with the objects of 530 consumers from the teens to the forties, in order to utilize the characteristics of consumers as basic materials for the planning of smart clothing, which is reasonably designed to have both of function and fashion, by checking the characteristics of consumers. The results are as follows; 1. The interest degree of fashion was the highest in the 20's and the acceptance degree showed the medial frequency in all age groups. In terms of the analysis result regarding general persons and professionals, professionals showed higher frequency distribution in both interest degree and acceptance degree than general persons. 2. When a comparison for each age, general person, and professional was made, more than the majority of all could not recognize the terms and concept about the smart clothing, but in terms of the favorable impression, more than the majority answered that it interests them. 3. More than the majority of the objects of this survey responded that they have a purchase intention and in terms of the desired purchase price, the price below 500,000 won showed the most frequency. In terms of the reason of wearing the smart clothing, they responded that they can select needed functions, and in terms of an occurring problem, they answered that it is the high cost of economic burdens.

• 한국화재소방학회논문지
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• 제22권1호
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• pp.54-60
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• 2008

불특정다수인이 이용하는 다중이용업소의 실제 화재발생건수는 많지 않으나, 화재가 발생하면 인명피해가 많아 사회적문제가 된 것이 한두 번이 아니다. 이런 일이 일어날 때마다 대책 마련에 급급하여 온 것이 사실이며, 부분적으로 문제를 해결해 왔다. 다행히도 정부에서 다중이용업소에 대한 근본적인 안전대책을 마련코자 $\ulcorner$다중이용업소의 안전관리에 관한 특별법$\lrcorner$을 제정하여 시행중에 있다. 요즘 하나의 건축물에 여러 종류의 다중이용시설이 복합 집적(集積)화 되는 대규모 다중이용시설의 형태를 갖추는 업소가 늘고 있다. 또한 다중이용업소 밀집지역이 증가 추세에 있다. 이런 형태의 건물은 방화관리가 어려울 뿐만 아니라, 불특정다수의 피난인원이 많고 복잡한 미로형태를 가진 방호공간이 되어 항시 많은 인명피해가 발생하는 특징이 있다. 출입자의 비상구 위치확인 습관과 소방안전의식 제고, 건물주(영업주)의 자율 방화관리 역량제고, 실내장식물 불연화, 소방 당국의 교육 홍보 제도개선 등 삼위일체식 안전관리가 절실히 요구된다.

• 응용통계연구
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• 제34권4호
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• pp.599-609
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• 2021

군집간의 개체 수의 차이가 큰 자료들을 불균형자료라고 한다. 불균형자료의 판별분석에서 다수 범주의 개체를 잘 분류하는 것 보다 소수 범주의 개체를 잘 분류하는 것이 더 중요하다. 그러나 개체 수가 상대적으로 작은 소수 범주의 개체를 개체 수가 상대적으로 많은 다수 범주의 개체로 오분류하는 경우가 많다. 본 연구에서는 이를 해결하기 위해 HDBSCAN과 SMOTE를 결합한 방법을 제안한다. HDBSCAN을 이용하여 소수 범주의 노이즈와 다수 범주의 노이즈를 제거하고 SMOTE를 적용하여 새로운 자료를 만들어낸다. 기존의 방법들과 성능을 비교하기 위하여 AUC와 F1 점수를 이용하였고 그 결과 대부분의 경우에 HDBSCAN과 SMOTE를 결합한 방법이 높은 성능 지표를 보였고, 불균형자료를 분류하는데 있어 뛰어난 방법으로 나타났다.

• International Journal of Costume and Fashion
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• 제16권1호
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• pp.1-16
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• 2016

The purpose of this study was to explore fashion design and merchandising students' perception of creativity and the copyright protection of apparel design. A survey with open-ended questions was developed and distributed to a total of 100 fashion major students with specializations in apparel design and merchandising from three different universities located in a northwestern state of the United States. A majority of respondents showed their awareness that copying apparel design is ethically wrong and counterfeiting is legally wrong. They were able to distinguish between copying and interpreting and were aware that incorporating limited elements from inspirations was ethically acceptable. However, many of the students look for design inspiration from secondary sources, such as existing designers' works which they observe over the Internet, magazines, fashion shows, and store shopping, which may pose them to the temptation to copy such ideas. Although fashion copyright protection law has yet to become enacted, a majority of respondents support passage of fashion copyright protection law. The results give support to the needs for addressing the creative problem-solving processes and ethical decision-making jointly within apparel design and merchandising curriculum.

• 한국측량학회지
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• 제14권1호
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• pp.39-47
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• 1996

Landsat TM자료를 이용하여 전라남도 전역에 대한 토지피복분류를 실시하므로서 광역 분석시 자주 발생하게되는 서로 다른 두 path 데이타의 통합 분석기법을 제시하였다. path가 다를 경우 관측일이 다르므로 개별적 분석후 통합하였으며, 이 과정에서 두 scene간의 분류가능 항목의 변화 및 자료 중복지역의 처리문제 등이 대두되었다. 또한 광역 분석시 위도차에 따른 데이타값의 변화로 인하여 분류항목 및 training field의 선정이 어려웠다. 본 연구에서는 수차례의 시행착오를 통하여 이러한 문제에 대한 해결방안을 제시하였으며, 분류 정확도 향상을 위한 Bayesian 최대우도법 및 majority 필터링의 효율성을 입증하였다.

• 제어로봇시스템학회논문지
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• 제4권3호
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• pp.342-348
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• 1998

A majority of industrial robots are controlled by a simple joint servo control of joint actuators. In this type of control, the performance of control is greatly influenced by the joint interaction torques including Coriolis and centrifugal forces, which act as disturbance torques to the control system. As the speed of the robot increases, the effect of this disturbance torque increases, and hence makes the high speed - high precision control more difficult to achieve. In this paper, the joint disturbance torque of robots is analyzed. The joint disturbance torque is defined using the coefficients of dynamic equation of motion, and for the case of a 2 DOF planar robot, the conditions for the minimum and maximum joint disturbance torques are identified, and the effect of link parameters and joint variables on the joint disturbance torque are examined. Then, a solution to the optimal path placement problem is propose that minimizes the joint disturbance torque during a straight line motion. The proposed method is illustrated using computer simulation. The proposed solution method can be applied to a class of robots that are controlled by independent joint servo control, which includes the vast majority of industrial robots.