• Proceedings of the KSME Conference
• /
• 2003.11a
• /
• pp.1736-1740
• /
• 2003

There have been various studies to find out the correlation between subjective and objective evaluation ride comfort in vehicle. To be proper, subjective evaluation considers the signal pattern of vibration generated by vehicle. In this study, driving test is carried out to extract the correlation between subjective evaluation by subjects and vibration signals measured on the seat when a test vehicle is passing over test bumpers, which have two sorts of width change and height change respectively. A unique reference bumper is used to be compared with the relative comfort of test bumpers.

• Transactions of the Korean Society of Automotive Engineers
• /
• v.13 no.2
• /
• pp.29-36
• /
• 2005

In oder to generate various shock signals in a field study, a passenger car was driven at several speeds over road profiles that included a number of half sine shaped bumps of various heights. A triaxial SAE pad sensor was mounted on the front passenger seat to measure the acceleration signals which might produce subjective discomfort. The measured accelerations were correlated with the subjective assessments of 14 subjects. The magnitude of subjective discomfort was found to be proportional to the VDV and also the peak to peak of the frequency weighted acceleration signal.

• Journal of the Korean Institute of Landscape Architecture
• /
• v.37 no.3
• /
• pp.69-81
• /
• 2009

This study was intended to evaluate the objective landscape of rural region using an additive integration index method in the Seondong region of Gochang-gun, Jeollabuk-do, Korea. This study consisted of the following three steps. First, this study developed an additive integration index calculation model for landscape assessment based on indicators and weight to each space type in accordance with three landscape fields which were developed by the expert Delphi method. Second, this study used NDVI (Normalized Difference Vegetation Index) and permeable area rate, which were available from high resolution satellite image, to calculate the green naturality degree, area rate, and building coverage respectively. Third, this study has calculated the landscape assessment index of rural regions using an additive integration index method made of assessment data and weight for each indicator. This study has found the following results: 1) landscape level was very poor in all 6 types of space, marking grade five; 2) while the highest level of natural landscape and mixed landscape was grade two, that of artificial landscape was grade five; 3) based on objective landscape, grade five showed the highest frequency, and grade one, two, three, and four followed in that order.

• Proceedings of the Korean Society for Information Management Conference
• /
• 1999.08a
• /
• pp.95-98
• /
• 1999

본 연구의 목적은 양질의 웹사이트를 선별하기 위한 평가 기준을 수립하고 평가 항목에 계량적인 평가 척도를 적용한 평가 모형을 제시하는 데 있다. 문헌연구 및 예비실험을 통해 보편적이고 객관적으로 적용될 수 있다고 판단된 평가 항목을 선정하여 내용, 디자인, 접근의 용이성 범주로 구분, 국내 웹사이트 평가실험에 사용하였다. 평가실험은 객관적 평가와 주관적 평가를 사용하였으며, 이를 토대로 산출된 각 품질 평가 지수에 근거하여 유용한 웹사이트를 선정하는 단계를 제시하였다.

• Proceedings of the KSLP Conference
• /
• 1999.11a
• /
• pp.180-180
• /
• 1999

배경 : 음성평가시 그 음질을 파악하기 위한 검사 중 주관적 검사로서 많이 쓰이는 것은 GRBAS 척도에 의한 청인지적 4단계 평정이고, 객관적 검사로서 널리 쓰이고 있는 검사 도구는 CSL 중 MDVP이다. 이중 GRBAS 검사는 평가자의 고도의 숙련도를 요구하며, MDVP에 의한 음성평가는, 나타난 결과에 대한 정확한 해석을 요구한다. 목적 : 이에, 1차적으로 음성과용 환자를 대상으로 하여, GRBAS 척도에 의한 청인지적 음성평가 결과와 CSL 중 MDVP에 의한 객관적 음성평가 결과에 대한 상관성을 비교, 분석해 보고, 이를 통하여 청인지적 음성평가에 숙련되지 못한 평가자가 객관적 검사도구를 통하여 음성평가를 하고자 할 때 주목해야 할 변인들에 관하여 알아보고자 한다. (중략)

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.17 no.8
• /
• pp.881-890
• /
• 1992

Resonable speech quality assessment methodologies are required for speech quality assessment model which is used at speech system and communication network. There are objectlve measuies and subjective measures and subjective measure has the variousproblems in speech quality assessment methodologies. The objective of this study is to compare objective measures with subjective measure and obtain the objective measure as close as possible to subjective measure.

• Journal of Broadcast Engineering
• /
• v.20 no.2
• /
• pp.204-214
• /
• 2015

Depth map upsampling is an approach to increase the spatial resolution of depth maps obtained from a depth camera. Depth map quality is closely related to 3D perception of stereoscopic image, multi-view image and holography. In general, the performance of upsampled depth map is evaluated by PSNR (Peak Signal to Noise Ratio). On the other hand, time-consuming 3D subjective tests requiring human subjects are carried out for examining the 3D perception as well as visual fatigue for 3D contents. Therefore, if an objective metric is closely correlated with a subjective test, the latter can be replaced by the objective metric. For this, this paper proposes a best metric by investigating the relationship between diverse objective metrics and 3D subjective tests. Diverse reference and no-reference metrics are adopted to evaluate the performance of upsampled depth maps. The subjective test is performed based on DSCQS test. From the utilization and analysis of three kinds of correlations, we validated that SSIM and Edge-PSNR can replace the subjective test.

• The Journal of Society for e-Business Studies
• /
• v.27 no.1
• /
• pp.81-94
• /
• 2022

In the service sectors, the qualitative evaluation method in the form of a survey is widely used as a major assessment tool to evaluate the quality of service. However, the results obtained from a survey can involve the subjective judgment of the respondent. In this study, we propose a method to secure objectivity by excluding subjectivity that may be included in the qualitative evaluation results. In particular, we deal with a situation where the same type of qualitative evaluation tool is used repeatedly by several service providers. To this end, by utilizing both the Ordered Probit model and third-party evaluation results, we determine whether subjectivity is involved in the results. After correcting subjectivity, the final results are obtained through statistical analysis. The application analyzed in this study is the medical service area. With the actual evaluation results supplied by the service providers, we explain how objectivity can be secured from the assessment data by applying our proposed approach.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.16 no.11
• /
• pp.7414-7423
• /
• 2015

Subjective cognitive-linguistic complaints in older adults contribute to the diagnostic and prognostic investigation of MCI or dementia. However, the utility of subjective test for predicting cognitive-linguistic decline is controversial. Few domestic studies have included the correlation between subjective and objective tests systematically. The current study analyzed 26 studies published since 2000, and the effect sizes of their correlation coefficients between two tests were computed. The results of qualitative analysis indicated that the number of subjects ranged from 26 to 657. Subjective tests included the self-report 75.4% and the informant-report 24.6%. In objective tests, memory comprised the largest proportion, followed by global cognition, and language, etc. As a result of meta-analysis, self-report test had the predictive value for dementia, and informant-report test contributed to discriminate among 3 groups. In the elderly group, self-report test was correlated with reasoning, and informant-report test with memory and language. In MCIs, self-report test predicted several abilities including language, and informant-report test signaled the future decline of domains like global cognition. Two types of subjective tests in dementia also represented memory, language, and global cognition accurately. This study provides evidence-based information to support relationships between subjective and objective tests for cognitive-linguistic ability in 3 groups.

• Proceedings of the Korean Society of Broadcast Engineers Conference
• /
• 2014.11a
• /
• pp.156-157
• /
• 2014

본 논문에서는 깊이맵 업샘플링을 이용하여 객관적 메트릭과 3D 주관적 평가 사이의 관계를 조사한다. 전자의 경우, 다양한 참조(full-reference) 및 무참조(no-reference) 평가도구가 깊이맵의 품질을 측정하기위해 적용되고, 3D평가는 주관적 평가로 얻는다. 이 두 개의 결과는 세 가지의 상관계수를 이용하여 상호 관련성을 찾은 후에, 최적으로 주관평가에 근접한 객관적 메트릭을 얻는다.