• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
• /
• 2000.06a
• /
• pp.132-137
• /
• 2000

차량 개발에 있어서 승차감(Ride)과 조향성능(Handling)의 평가는 차량의 동적 성능을 판단하는 주 인자인데, 차량업계에서는 이들 평가의 대부분을 주관적인 방법에 의존하고 있다. 최근에는 주관평가의 문제점을 해소하기 위해 차량의 동적 거동을 직접 측정함으로써 평가를 객관화하려는 시도가 많이 행해지고 있다. 본 연구에서는 숭차감 평가를 위한 정량화 지수를 개발하는데 있어서 저해 요인들을 분석하고 이에 대한 해결방안을 제안함으로써 측정된 물리량을 이용하여 주관평가 결과를 대체할 수 있는 방안을 정립하고자 한다. 우선 정적, 동적 승차감에 대한 모형을 통해서 승차감 정량화의 한계와 기존의 승차감 평가지수에 대해 고찰하고, 실제 차량 시험에서 얻어진 주관 평가치와 측정 가속도간의 상관관계 정립을 통해 관계식을 수립하는 방안에 대해 서술하고자 한다. 이 과정에서 주행시 간헐적으로 들어오는 충격성 입력을 처리하는 방법도 함께 논하였다.

• The KIPS Transactions:PartC
• /
• v.11C no.6 s.95
• /
• pp.773-780
• /
• 2004

In this paper, we measured the transmission characteristics of a MPEG2 and a DV that are typical stream-type traffics on the very high speed network and carried out the subjective evaluation of end users for these stream-types. In the subjective evaluation of these stream-type data, video quality evaluation is based on ITU-R BT.500-1 and audio qualify evaluation is based on ITU-R BS.1116-1. Also experiment method to acquire the subjective evaluation of end users is selected the 5 grades method of DSCQS. Under the same condition, in case of MPEG2, the evaluation grade of the video and the audio duality becomes deteriorated at the load rate of $54\%$ that network traffic increases rapidly. In case of DV the evaluation grade of video duality began decrease, but the degree of the change was slower than MPEG2 at the same load rate. Moreover the subjective evaluation grade of end users was superior to load rate $70\%$ in case of DV audio quality, traffic and QoS control that consider the subjective evaluation of end user is required. Conclusively, in case of MPEG2, we can perform traffic control that only use the actual measurement values on the network. However in case of DV, we can perform traffic control that the actual measurement values on the network and the subjective evaluation of end users are considered at the same time.

• Progress in Medical Physics
• /
• v.19 no.4
• /
• pp.201-208
• /
• 2008

Physical evaluations provide the basis for an objective and quantitative analysis of the image quality. Nonetheless, there are limitations in using physical evaluations to judge the utility of the image quality if the observer's subjectivity plays a key role despite its imprecise and variable nature. This study proposes a new method for objective and quantitative evaluation of image quality to compensate for the demerits of both physical and subjective image quality and combine the merits of them. The images of chest phantom were acquired from four digital radiography systems on clinic sites. The physical image quality was derived from an image analysis algorithm in terms of the contrast-to-noise ratio (CNR) of the low-contrast objects in three regions (lung, heart, and diaphragm) of a digital chest phantom radiograph. For image analysis, various image processing techniques were used such as segmentation, and registration, etc. The subjective image quality was assessed by the ability of the human observer to detect low-contrast objects. Fuzzy integral was used to integrate them. The findings of this study showed that the physical evaluation did not agree with the subjective evaluation. The system with the better performance in physical measurement showed the worse result in subjective evaluation compared to the other system. The proposed protocol is an integral evaluation method of image quality, which includes the properties of both physical and subjective measurement. It may be used as a useful tool in image evaluation of various modalities.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.21 no.8
• /
• pp.475-484
• /
• 2020

This monograph was probed effectively by using practical methods in a subjectivity study that was accessible in depth, departing from bygone behavior of functional quantity analysis of awareness and the opinions of young people about the general (public) model of TV advertising. The perception patterns resolved in this study sorted out four types in a Q-methodology. The result is divided as follows: 1 [(N=7): Advertising Consensus Type], 2 [(N=7): Advertising Negative Type], 3 [(N=5): Advertising Purchasing Reduction Type], and 4 [(N=1): Advertising Persuasion Orientation Type]. As such, we found very different types all over. Finally, this study reviews subjective acceptance as to the type of model reception with regard to general TV advertising, offering a developmental suggestion on the issue, and an agenda about it.

• Journal of Broadcast Engineering
• /
• v.12 no.1 s.34
• /
• pp.41-52
• /
• 2007

The 3DTV services can be seen as a general case of the multi-view video that has been receiving a significant attention lately. However, the key factors that influence the success of 3DTV are the availability of content, the ease of use, the quality of contents, and the reduction of cost. This paper deals primarily with the perceptual improvement in image quality, especially based on human factors. An optimal asymmetrical coding method for binocular and multi-view images is presented. The quantitative value of asymmetrical rate to maintain optimized subjective image quality is explored. Also we analyze how edges of 2D images affect on 3D perceptions and propose an edge-preserving algorithm to perform perceptual improvements. Experimental results demonstrate that the proposed algorithm enhances subjective image quality much better than conventional methods.

• The Journal of the Korea Contents Association
• /
• v.13 no.9
• /
• pp.204-215
• /
• 2013

The purpose of the present study was to investigate the role of social support and hardiness on the relationship between parenting attitudes and subjective well-being. The participants of this study were 318 university students and analyses for this study was conducted by using SPSS 15.0 and Amos 7.0. The major results were as follows; Social support confirmed mediating variable between parenting attitudes and hardiness, and hardiness confirmed mediating variable between social support and subjective well-being. That is, parenting attitudes had some effect on subjective well-being through hardiness based on social support. Finally, the needs of development about the counseling and the education contents as a special intervention was discussed, and that contents were reflected social support and hardiness to be improved. Also, limitations and implications of subsequent further study were suggested in this research.

• The Korean Journal of Applied Statistics
• /
• v.24 no.5
• /
• pp.931-939
• /
• 2011

In practice, thresholds are determined by the two subjective assessment methods in a generalized pareto distribution of mean extreme function(MEF-graph) or Hill-graph. To remedy the problem of subjectiveness of these methods, we propose an alternative method to determine the threshold based on the robust statistics. We compared the MEF-graph, Hill-graph and our method through VaRs on the Korean stock market data from January 5, 1987 to August 3, 2009. As a result, the VaR based on the proposed method is not much different from the existing methods, and the standard deviation of VaR for our method was the smallest. The results show that our method can be a promising alternative to determine thresholds of the generalized pareto distributions.

• The Academic Congress of Korean Shoulder and Elbow Society
• /
• 2004.03a
• /
• pp.44-44
• /
• 2004

• Journal of the Korean Data and Information Science Society
• /
• v.26 no.6
• /
• pp.1465-1477
• /
• 2015

In Korea, the word, 'Literary Therapy' can be replaced by 'Bibliotherapy', 'Journal Therapy', 'Writing Therapy', 'Poem Therapy', 'Integrated Literary Therapy', or 'Imaginary-Oriented Poetry Therapy', and so on. This study, intended on people related to literary therapy, uses Q-methodology as useful research method of objectifying abstract concepts which can be perceived differently according to individual experience or perception, to investigate types of literary therapy's subjective perceptions. The result of study can be analyzed by four types: The first type is 'Pursuing Generalization', the second type is 'Considering the Therapist', the third type is 'Emphasizing the Integration', and the forth type is 'Maximizing the literary therapy'. Through this result of the study, we can find the responsibility of literary therapy as a leader of cultural, artistic therapy to break down various pathological situations which contemporary society have.

• The Journal of the Korea Contents Association
• /
• v.19 no.12
• /
• pp.546-557
• /
• 2019

This study applied the Q methodology to customers using the Ethnick restaurant in Itaewon to understand subjective perceptions of customers using the restaurant. The purpose of the study is to characterize the subjective structure of the restaurant and to describe and analyze the characteristics of the types of subjective. As a result of type analysis, a total of five were derived. Type 1 (N=4) : Ethnic Food Preferred Type, Type 2 (N=5): Mainland flavour Seeking Type, Type 3 (N=3) : Food Material Sanitary Conditions Type 4 (N=6): The restaurant's Restaurant Service Preference Type, and Type 5 (N=2) : The mood sensibility type were analyzed to have various characteristics of each type. In future studies on Ethnick restaurants, we intend to modify and supplement the detailed Q methodological questions and analysis methods based on many literature and empirical studies to analyze the various opinions of the respondents in a specific and in-depth manner.