• Journal of the Korean Institute of Telematics and Electronics S
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• v.35S no.6
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• pp.147-155
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• 1998

Conventional time-scale modification methods have the problem that as the modification rate gets higher the time-scale modified speech signal becomes less intelligible, because they ignore the effect of articulation rate on speech characteristics. In this paper, we propose a variable time-scale modification method based on the knowledge that the timing information of transient portions of a speech signal plays an important role in speech perception. After identifying steady protions only. The result of subjective preference test indicates that the proposed method produces performance superior to that of the conventional SOLA method.

• Journal of the Korean Home Economics Association
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• v.42 no.5
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• pp.175-192
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• 2004

The purpose of this study was to examine the preferences and needs of middle-aged salary workers' to make silver town their future care type. The sample of this study consisted of 837 middle-aged salary workers living in Seoul, Daejeon, Jeonju, Daegu, Gyonggi-do, and Jeju-do. Statistic values that were used for the analysis were frequencies, means, and logistic analysis. The major findings were as follows : First, 91.5% of the middle-aged salary workers needed silver town as their future care type and 63.2％ of all workers wanted to live in the silver town. Second, the most frequent reason for choosing silver town as their care type was the convenience of their daily life. For the most part, salary workers answered that they would be moving to a silver town when they have some problems with mobility. Also, they wanted to pay for a deposit of 54,620,000 won and a monthly payment of 870,000 won. Third, the significant factors affecting the salary workers' preference to silver town were the respondent's sex and job, possession of a first child or not, real estate asset and monthly household income, subjective recognition for their economic status, having savings for their future, and the preparation for elderly life.

• Journal of Korea Multimedia Society
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• v.20 no.11
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• pp.1741-1749
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• 2017

In commercial digital-cameras, color-filter filters light according to wavelength range of color filter array (CFA) and the filtered intensities contain color information of light. Then, output data of CFA is transformed to final rendered image through demosaicing process. In image processing of digital-camera, the quality of the final rendered image is affected by optical cross talk of CFA, kind of CFA pattern etc. Basically, pattern of CFA plays important role in image quality of final image rendered by digital-camera. Therefore, an evaluation system capable of quantitatively evaluating CFA is needed. This paper proposes a novel evaluation system using existing and proposed image metrics for evaluating CFAs of digital-camera. Proposed CFA evaluation system consist of color difference in CIELAB and S-CIELAB, Structure SImilarity (SSIM), MTF50, moire starting point (MSP), and subjective preference (SP). MSP and SP are newly designed for the proposed evaluation system. Proposed evaluation system is expressed in polar coordinates to analyze the characteristics of CFA objectively and intuitively. Through simulations, we confirmed that proposed CFA evaluation system can objectively assess performance of developed CFAs.

• Proceedings of the Korea Society for Energy Engineering kosee Conference
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• 1998.10a
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• pp.3-8
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• 1998

The present work proposes the potential fuzzy framework, based on fuzzy set theory, for supporting decision-making problems, especially, selection problems of a best design in the area of nuclear energy system. The framework proposed is composed of the hierarchical structure module, the assignment module, the fuzzification module, and the defuzzification module. In the structure module, the relationship among decision objectives, decision criteria, decision sub-criteria, and decision alternatives is hierarchically structured. In the assignment module, linguistic or rank scoring approach can be used to assign subjective and/or vague values to the decision analyst's judgment on decision variables. In the fuzzification module, fuzzy numbers are assigned to these values of decision variables. Using fuzzy arithmetic operations, for each alternative, fuzzy preference index as a fuzzy synthesis measure is obtained. In the defuzzification module, using one of methods ranking fuzzy numbers, these indices are defuzzified to overall utility values as a cardinality measure determining final scores. According these values, alternatives of interest are ranked and an optimal alternative is chosen. To illustrate the applicability of the framework proposed to selection problem, as a case example, the best option choice of four design options under five decision criteria for primary containment wall thickening around large penetrations in an advanced nuclear energy system is studied.

• Science of Emotion and Sensibility
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• v.4 no.2
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• pp.39-45
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• 2001

This study was conducted to identify the structure of the sensibility and autonomic nervous responses to odor by ages. 72 participants, 24 each in their teens, twenties, and thirties were given odor stimuli, cederwood, grapefruit, teebaum, peppermint, rose. During the presentation of stimuli, participant were measured blood flow, skin temperature, skin conductance, and ECG and subjective emotion to each odor were evaluated, Five factors, aesthetic, intensity, naturality, uniqueness, and romantism were identified but there were no differences by ages. Emotional factors that predict the preference to certain odors turned out partly different by ages. However, odors that made participants feel sick created more autonomic nervous response than odors that made them feel good.

• Transactions of the Korean Society of Machine Tool Engineers
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• v.18 no.1
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• pp.59-67
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• 2009

The purpose of this study is to provide a decision support to select an appropriate layered manufacturing(LM) machine that suits the application of a part. Selection factors include concept model, form/fit/functional model, pattern model far molding, material property, build time and part cost that greatly affect the performance of LM machines. However, the selection of a LM is not an easy decision because they are uncertain and vague. For this reason, the aim of this research is to propose hybrid multiple attribute decision making approaches to effectively evaluate LM machines. In addition, because subjective considerations are relevant to selection decision, a fuzzy logic approach is adopted. The proposed selection procedure consists of several steps. First, we identify LM machines that the users consider After constructing the evaluation criteria, we calculate the weights of the criteria by applying the fuzzy Analytic Hierarchy Process(AHP) method. Finally, we construct the fuzzy Technique of Order Preference by Similarity to Ideal Solution(TOPSIS) method to achieve the ranking order of all machines providing the decision information for the selection of LM machines.

• Journal of Korean Institute of Industrial Engineers
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• v.29 no.4
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• pp.259-270
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• 2003

In order to properly design warning sounds that are affectively suitable to computer users, warning sounds used in Windows operating system were analyzed in terms of their sound properties; frequency band, spectral characteristics and physical intensity. A total of 36 warning sounds (3*4*3) were generated and tested with respect to three experimental variables. Among 178 collected affective adjectives that are related to hearing and sounds, seven representative affective adjectives were abstracted by statistical grouping techniques. In the experiment, subjective preference tests were performed for the 36 warning sounds according to the seven affective factors. From the result, the affective factors were again grouped into three major factors and the 60dB boost-type warning sounds at the low frequency band were, in general, the most preferred. followed by the 70dB cut-type sounds at the middle frequency band. These warning sounds have a characteristic of boost power spectrum below 1000Hz frequency band and received good scores on simplicity, clarity and accurateness.

• Korean Journal of Community Nutrition
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• v.13 no.2
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• pp.153-163
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• 2008

The objective of this research was to study the differences between urban and rural areas high school students in body image and dietary habits. The number of subjects in Seoul and Kyungkido were 902. Based on self-reported height and weight, there was no significant difference between the urban and rural students. However, the rate of obesity was significantly higher in males, whereas the rate of underweight was significantly higher in females, especially for urban females (p < 0.05). Their ideal body image ratio as skinny or slender-type was 91.6% (urban) and 95.7% (rural) for male category while 100% (urban) and 99.4% (rural) for females. Urban females had a strong preference for a skinny body (p < 0.05). Rural students were more highly interested in weight control than urban students were, but they appeared not to care their health. In addition, they had significantly lower levels of weight control knowledge and dietary attitude score (p < 0.001). Subjective assessment of body weight appeared to be more important in terms of body satisfaction, weight control knowledge and dietary attitude than actual measurement of body mass index. Significant test revealed that weight control knowledge was related to dietary attitude (p < 0.01). (p < 0.01).

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2004.11a
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• pp.810-813
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• 2004

The task of introducing sounds leads to the realization of a comfortable acoustic environment and the design of good soundscape. This paper aims to rate the preference of environmental sounds suitable to the public spaces such as park, garden, bus terminal, urban street. And aims to search for the methodology how to select the introducing sounds by subjective and objective procedures. Seventeen kinds of introducing sounds were rated by nine adjectives in the presence of visual site informations. Also adequate sound levels were calculated by adjusting the volume of introducing sounds in the presence of the background sounds and visual informations. The results of psycho-acoustic experiments are as follows. 1. Proposal of various introducing sounds were evaluated to be possible at the rather calm natural park. 2. The introducing sounds which have opposite visual image or already existing at the place were evaluated not adequate to the sound circumstances of the place. 3. By the sounds with the same meaning, the identity of the street and the improvement of sound circumstance can be obtained.

• Journal of the Korean Institute of Intelligent Systems
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• v.16 no.6
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• pp.653-658
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• 2006

Trust can be defined as the level of subjective probability with which an agent will perform a particular action. This paper proposes a comprehensive fuzzy trust model which incorporates dispositional trust, general trust, and situational trust and reputation information. In the model, the preference degrees for the interaction outcomes with respect to the evaluation criteria are expressed in a fuzzy set, and Sugeno's fuzzy integral is employed to aggregate the satisfaction degrees with respect to the importance of evaluation criteria which can be assigned in a way to preserve the properties of the ${\lambda}-fuzzy$ measure.