• Horticultural Science & Technology
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• v.28 no.4
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• pp.691-695
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• 2010

In order to find correlations between the sensory evaluation and instrumental analysis in 'Campbell Early' grape, grapes were divided into three parts. One-half parts were used for the sensory evaluation and the other half were used as samples for instrumental analysis. Relationship between sensory evaluation and instrumental analysis were studied through correlation study using 48-paired data set obtained during storage. Soluble solid content analysis showed that instrumental quality attributes increased along the passage of storage time with increasing temperature. pH and titratable acidity decreased slightly at lower storage temperatures. Correlations between instrumental quality attributes in grapes were found to be very low. Positive correlation was found between pH and soluble solid content, and negative correlation was found between pH and titratable acidity. The relation of sourness and sweetness to sourness was higher than other sensory evaluation factors, and the shape of the grapes was found to have little relation to their sweetness. Texture ($r^2$=0.890) was found to be the most important factor in preference, followed next by sweetness with sourness ($r^2$=0.860). The correlations between the sensory evaluation and instrumental quality attributes were found to be very low, with overall acceptability given to a relatively high content of soluble solid content. Correlations between pH and titratable acidity in terms of overall acceptability were found to be very low.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 1993.04b
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• pp.28-32
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• 1993

최근 산업의 발달에 따라 각종 기계요소들은 강도, 경량화, 정밀도와같은 측면에서 엄격한 설계기준이 요구 되고 있고, 또한 첨단기술이 적용되는 다양한 전자부품에서 초정밀 가공을 필요로하고 있어, 이러한 기계요소 들의 품질향상을 위해서는 기계가공면에 관한 연구가 필연적으로 뒷받침 되어야 한다. 기계 가공면에 관한 연구에 있어서 반드시 고려되어야 할 요소는 surface integrity로서 이는 물리적 요소들을 포함하는 가공면의 성질이나 특성을 지칭하며, 피삭재의 정밀도 영향 평가나 고응력을 받는 부품의 설계시반드시 고려되어야 할 요소이다. 본 연구에서는 연속재결정법을 기계가공면에 도입하여 SUS304가공면에 형성된 소성스트레인을 평 가함과 동시에 이것의 신뢰도를 바탕으로기계가공면에 생성된 소성스트레인과 절삭조건과의 관계를 규명하고자 한다.

• Broadcasting and Media Magazine
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• v.15 no.4
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• pp.9-22
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• 2010

최근 full-HD 3D 방송, UD(ultra-definition) 영상 서비스, mobile device 향 양방향 HD급 화상통신 등 기존 영상 서비스의 품질을 월등히 향상시키고자 하는 연구들이 진행되고 있다. 본 기고에서는 기존 H.264/AVC 영상 압축 표준의 성능을 2배 이상 향상시키는 것을 목표로 진행 중인 새로운 차세대 영상 압축 표준인 HEVC(high-efficiency video coding; MPEG-H/H.265)의 표준화 동향을 소개한다. 또한, 현재 HEVC test-model (HM) version 1을 구성하고 있는 요소 기술들을 결정하기 위해 진행되었던 성능 평가 과정에 대해 간략하게 소개하고, 마지막으로 HM의 전반적 구성 및 현재 성능 수준에 대한 평가결과를 보인다.

• Proceedings of the Korea Information Processing Society Conference
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• 2007.05a
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• pp.683-684
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• 2007

본 연구는 가상현실 기반 프로토타입을 이용한 모바일 장치의 디자인 평가 방법에 관한 것으로, 모바일 장치의 디자인 요소 분류, 3 차원 데이터의 고품질 가시화 기법, 제품 기능과 동작에 대한 사용자 상호작용의 구현 방법을 제시하고자 한다.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.31 no.1 s.49
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• pp.79-83
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• 2005

The important elements influencing on the quality of make-up cosmetics are not only the ingredients themselves but also the cosmetic tool that delivers the ingredients. But sensory analysis by a has been used on a number of occasion. Therefore it is not reliable to apply the data to other products and not easy to identify the elements influencing the qualities of cosmetics. So we Intend to understand the elements influencing the quality of cosmetics and prepare the foundation by introducing objective measurement method. In this study, we fix the loose powder and make new loose powder puff. So we can accomplish objective measurement.

• Journal of the Institute of Electronics Engineers of Korea SP
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• v.46 no.3
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• pp.75-88
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• 2009

This paper presents a video quality assessment method based on quality degradation factors of real-time multimedia streaming services. The video quality degradation is caused by video source compression and network states. In this paper, we propose a blocky metric on an image domain to measure quality degradation by video compression. In this paper, the proposed boundary strength index for the blocky metric is defined by ratio of the variation of two pixel values adjacent to $8{\times}8$ block boundary and the average variation at several pixels adjacent to the two boundary pixels. On the other hand, unnatural image movement caused by network performance deterioration such as jitter and delay factors can be observed. In this paper, a temporal-Jerkiness measurement method is proposed by computing statistics of luminance differences between consecutive frames and play-time intervals between frames. The proposed final Perceptual Video Quality Metric (PVQM) is proposed by consolidating both blocking strength and temporal-jerkiness. To evaluate performance of the proposed algorithm, the accuracy of the proposed algorithm is compared with Difference of Mean Opinion Score (DMOS) based on human visual system.

• Journal of the Korean Society for information Management
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• v.35 no.1
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• pp.33-59
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• 2018

This study draws on the current momentum to diversify open government data research through multidimensional scaling and model development. It formulates a quality assessment model applicable to library open data, taking into consideration the paucity of such research in the field. The model was developed using the Delphi method and verified for validity and reliability on the basis of a survey administered to library open data users. The results of the fourth round exhibited an average of 4.00 for all measured elements and a minimum validity of .75, rendering the model appropriate for use in quality assessments of library open data. The convergence and stability results provided by the expert panel fell below .50, confirming that there was no need to conduct further surveys in order to establish the validity of the Delphi method. The model's reliability likewise garnered results of .60 and above in all three dimensions. This Model completed with the input of the Delphi panel was put through a verification process in which library open data users such as domestic and international librarians, developers, and open data activists reviewed the model for validity and reliability. The model scored low on validity on account of its failure to load all measure factors and elements pertaining to the three dimensions. Reliability results, on the other hand, were at 0.6 and above for all dimensions and measured elements.

• Journal of Nutrition and Health
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• v.42 no.8
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• pp.770-783
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• 2009

The school foodservice was quantitatively extended by policy of government all the while. There was carried out the survey of customer satisfaction about school foodservice by the ministry of education, science, and technology since 2006 years. Therefore, the purpose of this study was to grasp an improvement of the scores of school foodservice' quality attributes and satisfaction as compared with the preceding year by respondents and school type (elementary school, middle school, and high school). An annual survey was practiced to respondents (students, parents, and faculty) on september 2007 years and 2008 years in 16 cities and provinces. The statistics was analyzed to descriptive analysis and t-test for SPSS 12.0. The scores of school foodservice' quality attributes and overall customer satisfaction were almost increased to students, parents, and faculty and especially, big elevation in middle school. There was big increased the quality attributes such as 'providing information on foodservice', 'pleasant foodservice environment', 'kindness offered by employee' in elementary school, middle school, and high school to total respondents. An overall satisfaction in school foodservice was improved from 69.2 score to 71.9 score. On students, scores of overall satisfaction was increased from 72.9 to 74.0 as students of elementary school and from 61.5 to 65.8 as students of middle school (p < .001). Therefore, for improvement and development of school foodservice, there should be a necessary for an operator of school foodservice and an office of education to make an effort.

• 한국경영정보학회:학술대회논문집
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• 2008.06a
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• pp.326-332
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• 2008

본 연구는 새로운 딜리버리 채널로 자리잡고 있는 웹사이트의 평가도구를 개발하고 각 웹사이트를 비교 분석하여 상대적 강점과 약점을 파악할 수 있는 방법을 제시하고자 한다. 인터넷 웹사이트 평가 도구는 주관적인 평가요소의 사용을 배제하고 접근성, 속도, 항해성, 컨텐츠 품질 등 객관적 평가도구를 이용하는 상대적 평가방법을 사용하였고, 제안된 평가도구를 이용하여 서울지역 42개 대학교 웹사이트의 상대적인 위치에 따른 평가 및 분석을 실시하였다. 본 연구는 기존의 범용적 웹사이트 평가모델을 이용한 교육기관 웹사이트 평가에서 벗어나 교육기관 컨텐츠 특성에 맞는 평가도구를 제시하였다는 점에서 의의를 가진다.

• The Journal of the Korea Contents Association
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• v.10 no.4
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• pp.45-54
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• 2010

In this paper, we propose a quality interworking control system to enhance user's quality satisfaction in NGN environment by controling QoS parameters related with QoE in network layer when service user's QoE using variance multimedia service is poor. The proposed system gathers QoS parameter information in network layer through control packet such as RTCP, and evaluates QoE of multimedia service using these QoS parameter information. Comparing the evaluated QoE with the measured QoE in application layer, QCS judges quality degradation, deduces related QoS parameters and decides relative importance of each parameter when QoE is lower than threshold value. QCS generates QoS control values which is based on routing and switching policy in service quality control system(SCS) and forwards them to SCS. Through this proposed system, service and network providers can provide multimedia services of enhanced quality to service users taking account of service characteristic and network performance.