• 대한기계학회:학술대회논문집
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• 대한기계학회 2001년도 추계학술대회논문집A
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• pp.222-227
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• 2001

Nonlinear acoustic effect has been considered as an effective tool for the evaluation of material degradation. In this paper, the applicability of nonlinear acoustic effect to the evaluation of degradation of 2.25Cr-1Mo steel is investigated. Firstly, a number of 2.25Cr-1Mo steel samples were heat-treated, and their damage mechanism was examined. Secondly, Ultrasonic nonlinear parameter was measured. Nonlinear acoustic parameter was found to be clearly sensitive to the material degradation.

• 한국소음진동공학회논문집
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• 제12권8호
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• pp.626-631
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• 2002

A modified equation for the evaluation of discomfort of a seated human body exposed to differential vibration at the seat and the floor was proposed in this paper. Through the review and analysis of the preceding studies, effect of phase difference between the seat and the floor vibration on discomfort were quantitatively identified. The phase effect was shown to be governed by not only phase difference between the two vibrations but both their frequency and the magnitude, which means the present equation for the evaluation of perceptual amount of vibration provided by ISO 2631-1 should be modified. The proposed equation was developed such that the correction function was multiplied to the present equation. The correction function consisted of three parts, each of them represented the effect by phase difference, frequency and vibration magnitude on discomfort respectively.

• International Journal of Korean Welding Society
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• 제1권1호
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• pp.71-77
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• 2001

The characteristics of the fume generation in a flux cored arc welding were investigated using the fume collection chamber developed. The Korean Standard concerning the method for the evaluation of the fume generation rate(FGR) was updated by the evaluation method obtained through this study. It was found that the effect of humidity in the test environment should be considered and the automatic welding method had to be employed for the purpose of the exact evaluation of the fume generation rate. The results showed that the fume generation rate was influenced by the welding parameters. The important factors were the welding current arc voltage, travel speed, and contact tip to work distance(CTWD) that affected the heat input as well as the torch angle and the shielding gas flow rate that influenced the shielding effect. The fume generation rate increased as the heat input increased and the shielding effect decreased. It was also observed that the effect of the welding current is much grater than the other welding parameters.

• Asia pacific journal of information systems
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• 제34권1호
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• pp.226-247
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• 2024

Most studies on recommender systems to evaluate recommendation performances focus on offline evaluation methods utilizing past customer transaction records. However, evaluating recommendation performance through real-world stimulation becomes challenging. Moreover, such methods cannot evaluate the duration of the recommendation effect. This study measures the personalized recommendation (stimulus) effect when the product recommendation to customers leads to actual purchases and evaluates the duration of the stimulus personalized recommendation effect leading to purchases. The results revealed a 4.58% improvement in recommendation performance in the online environment compared with that in the offline environment. Furthermore, there is little difference in recommendation performance in offline experiments by period, whereas the recommendation performance declines with time in online experiments.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2005년도 창립60주년 기념 추계 학술대회
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• pp.113.1-113.1
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• 2005

• KIEAE Journal
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• 제13권5호
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• pp.23-30
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• 2013

Due to rapid urbanization and industrialization in Korea urban environmental problems such as changes in climate and shortage in green spaces and social problems such as lacks of interactions with neighbors have occurred and community garden appeared as one means to solve such problems. The purpose of this study is to comprehensively identify the evaluation items to measure the effect of community gardens. This study comprehensively researched the evaluation items through literature studies of domestic and overseas documents and verified their contents through case studies of domestic site. As a result of this study, a total of 39 measurement items for evaluation was identified and these items were divided into five large categories of "eco-environmental effect," "production and economic effect," "physical effect," "psychological effect," and "social effect" and these categories could be subdivided into 12 types. This study can be used as references for positively introducing the community gardens in Korea and has a meaning that it can be developed as an analyzing tool for measuring the concrete effects of community gardens when they are introduced in Korea in large numbers hereafter.

• 디지털융복합연구
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• 제15권10호
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• pp.411-417
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• 2017

본 연구는 미디어 효과 연구 분야에서 채널 요인으로 분류될 수 있는 배경음악의 사용이 TV다큐멘터리 수용자의 회상 기억, 몰입, 흥미 유발, 작품 평가 등에 미치는 영향을 실험을 통해 살펴본 연구이다. 미디어 효과에 관한 선행 연구들은 송신자 요인과 메시지 요인 등이 수용자의 기억과 이해, 지식 습득, 태도, 행위 등에 미치는 영향력을 살펴본 연구들이 대부분이다. 그러나 미디어의 채널요인으로 볼 수 있는 배경 음악이 수용자의 다양한 종속변인에 미칠 수 있는 영향력에 관한 연구는 대단히 제한적이며, 특히 텔레비전 다큐멘터리의 배경음악이 수용자에 미치는 영향에 관한 연구는 찾아보기 어렵다. 따라서 본 연구에서는 TV 다큐멘터리 프로그램에 사용된 배경 음악이 수용자의 회상 기억, 몰입도, 흥미 유발, 작품 평가 등에 미치는 영향력을 알아보기 위해서 대학생 피험자들을 대상으로 배경음악의 유무에 따라 2개의 집단으로 구분하고, 이들에게 TV 다큐멘터리 영상물을 시청하게 한 후, 이들의 회상기억, 몰입도, 흥미 유발, 작품 평가 등을 물어 설문조사를 실시하였다. 모두 101명을 대상으로 이루어진 설문 조사를 분석한 결과, TV 다큐멘터리의 배경 음악이 수용자들의 몰입도와 흥미 유발 정도를 증가시켰으며, 작품 평가도 더 높게 하는 것으로 나타났다. 그러나 TV 다큐멘터리의 배경음악이 수용자들의 회상 기억에는 유의미한 영향을 미치지 못하는 것으로 나타났다.

• 한국ITS학회 논문지
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• 제14권3호
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• pp.50-62
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• 2015

최근 지하철 9호선은 2단계 연장구간의 개통으로 최대 240% 혼잡도를 기록하는 등 지옥철로 불리우며 역사 내 상습혼잡에 대한 문제점이 지속적으로 야기되고 있는 실정이다. 역사 내 혼잡은 이용객의 불쾌감 유발과 철도 운영 효율성을 저하시키는 요인이 되고 있다. 본 연구는 이러한 철도역사 내 상습혼잡 해소를 위해 철도 이용객 정보제공의 효과평가 방법론을 정립하고자 하였으며, 효과평가 방법론 중 승강장의 혼잡상황을 고려한 Gate Metering 사례 연구를 진행하였다. Gate Metering을 접목시킨 Micro Simulation 및 Pedestrian Simulation Tool을 선정하여 열차의 혼잡도별 Metering 효과분석을 시행하였으며, 그 결과 Gate Metering 시행 시 혼잡도별 승강장의 서비스 수준 및 보행밀도가 개선되는 것을 확인하였다. 승강장에서 Metering을 실시 할 경우 플랫폼 대기 공간 내 혼잡도 조절 가능성이 있다고 판단한 것 이다. 따라서, 본 연구를 통하여 철도역사 내 이용객 혼잡도 관리를 위한 정보제공 효과평가 지표 수립 및 프로그램을 통한 이용객 정보제공 효과평가 방법론 정립이 가능하다는 것으로 판단되었다.

• 한국의류학회지
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• 제34권4호
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• pp.673-685
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• 2010

This study evaluates the fitness of brassieres through size measurement, comparative pattern analysis, cross section map analysis, 3-D shape analysis number, and fitness evaluation with a focus on domestic and overseas brands. Experimental brassieres were selected as mold brassieres of 3/4 cup in 75A size that is considered a popular design. Brands of selected brassiere were 2 domestic brands (A, B), 1 licensed brand (C), and 2 overseas brands (D, E). Subjects were 8 women in their early 20's. Data were analyzed by descriptive statistics, analysis of variance, reliability analysis, and factor analysis. The results were as follows; the size and pattern of brassieres showed a difference by each brand even though brassieres are the same design. In the wearing effect of brassieres, overseas brand brassieres played a major role in the breast-up effect, but they were not appropriate for the somatotype of Korean women. Domestic brand brassieres showed the volume-up effect, that was confirmed by the increasing bust circumference, bust depth when subjects wore it. In addition, the licensed brand brassieres showed the correction effect of body shape. Therefore, when purchasing a brassiere, the most important condition is to consider the individual characteristics of the somatotype. The results of factor analysis through a functional evaluation show that wearing satisfaction, size satisfaction, and the position of the bust point were important factors for fitness satisfaction and purchase.

• Journal of Nutrition and Health
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• 제36권5호
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• pp.500-507
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• 2003

This study was carried out to evaluate the effects on elementary school children of Internet-based nutrition education programs. The subjects consisted of 80 boys and girls (book-loaming group : 42, Internet-based teaming group : 38) in the 5th grade of elementary school. The results were as follows : The evaluation of Internet-based education programs by Internet-teaming group showed above average in all domains. As the favorite and wholesome menu chose‘nutrition kingdom’(52.6%) made of animation. The educational effect of this program was evaluated by comparing the methods of the Internet-learning group with those of the book-learning group. For effect-evaluation were measured the degree of nutrition knowledge and diversity score of dietary intake from before and after education. Before undertaking the program, there was no significant difference between the two groups in terms of their nutrition knowledge. However, the nutrition knowledge of the Internet-based teaming group after the program had increased significantly (p < 0.01) compared to the book-learning group. There was no significant difference between the two groups in terms of the diversity of dietary intake before the start of the program, but upon its completion, the Internet-based learning group showed a significant increase compared to the book-loaming group (p < 0.05). This suggests that Internet-based educational programs could be effective in drawing the interest and boosting the concentration levels of schoolchildren. In conclusion, Internet-based nutrition education shows the potential to be an effective alternative education method. (Korean J Nutrition 36(5): 500∼507, 2003)