• Journal of Information Display
• /
• 제12권3호
• /
• pp.153-158
• /
• 2011

This study was conducted for the purpose of evaluating the impressions gained by the members of the audience who have seen contents in a dome theater, based on their seating positions. Dome Theater Gaia provided the environment where the contents for evaluation were to be presented, and enquete (survey) was used as the investigative method. The survey results showed that the presentation of wide-viewing-angle three-dimensional (3D) contents proved effective in enhancing the 3D effect and the presence in a dome theater. Moreover, the study results confirmed that in relation to the impression evaluation of the contents for different seating positions, the optimal seating position varied according to the presentation method of the 3D and 2D contents.

• 대한방사선기술학회지:방사선기술과학
• /
• 제20권2호
• /
• pp.79-82
• /
• 1997

Image-based three dimensional radiation treatment planning(3D RTP) has a potential of generating superior treatment plans. Advances in computer technology and software developments quickly make 3D RTP a feasible choice for routine clinical use. However, it has become clear that an evaluation of a 3D plan is more difficult than a 2D plan. A number of tools have been developed to facilitate the evaluation of 3D RTP both qualitatively and quantitatively. For example, beam's eye view(BEV) is one of the most powerful and time-saving method as a qualitative tools. Dose-volume histogram(DVH) has been proven to be one of the most valuable methods for a quantitative tools. But it has a limitation to evaluate several different plans for biological effects of the tissue and critical organ. Therefore, there is a strong interest in developing quantitative models which would predict the likely biological response of irradiated organs and tissues, such as tumor control probability(TCP) and normal tissue complication probability(NTCP). DVH and NTCP of hepatoma were evaluated for three dimensional conformal radiotherapy(3D CRT). Also, 3D RTP was analysed as a dose optimization based on beam arrangement and beam modulation.

• 대한방사선기술학회지:방사선기술과학
• /
• 제45권5호
• /
• pp.423-431
• /
• 2022

The purpose of this study is to present objective information in applying 3D printing technology for PET/CT (Positron Emission Tomography/Computed Tomography) performance evaluation and use it as a basic research that can be applied to various purposes in the future. Phantoms were manufactured with step wedge of ABS(Acrylonitrile Butadiene Styrene) and ACR(Acrylic acid) material. The counts for each ROI(Region of Interest) were analyzed through image acquisition in PET/CT. And the variation rate of counts and CNR(Contrast Noise Ratio) was evaluated. In the counts analysis, the effect of thickness occurred. In addition, in the variation rate analysis, the thickness setting of steps wedge 4 to 5 levels should be considered first. These results minimize quantitative and qualitative changes in the phantom manufactured based on 3D printing, and enable more stable PET/CT performance evaluation. Based on 3D printing in PET/CT, various phantoms are expected to be produced in the future. If the characteristics of each material are considered and applied through the basic research such as this research, the result of the phantom manufactured through 3D printing can be more meaningful and will be used in a wide range.

• 기술혁신학회지
• /
• 제4권3호
• /
• pp.275-290
• /
• 2001

The frameworks for evaluation of national R&D programs reflect their various political and administrative cultures(Gibbons & Georghiou, 1987), and the structure of national R&D system. In this research the core research questions are : what is god evaluation\ulcorner What is being evaluated, by whom, by which criteria, for whom and what purpose\ulcorner In order to examine these general aims and answer these questions, in detail several objectives can be proposed on the process of this research. In this research, the national R&D programs will be considered in terms of the interface between evaluation and the wider policy-making process. The programs for case study are the Alvey program(UK), the Advanced Technology Program (US) and the Framework program(EU) . One of the characteristics of these programs is the well established evaluation systems they have. From the comparative analysis, we can withdraw some useful implication for Korean evaluation practice for national R&D programs. Evaluation system is social process and the way in which it is organized is critical to its outcome.

• 대한가정학회지
• /
• 제44권7호
• /
• pp.153-162
• /
• 2006

This study was attempted to investigate the possibilities of fitness evaluation of virtual model using 3D clothes modeling software. For the purpose, two one-piece dresses were made with two kinds of patterns using Qualoth program, and then each dress was fitted to a real model and a virtual model, and the results were compared and discussed. The result of this study was as follows. First, the fitness evaluation of real model showed a significant difference only at a little difference in figures (1-2.5cm) of the pattern, while any significant difference in appearance was not found in case of a virtual model fitted a dress made out of a pattern with the same difference in figures. Second, items to evaluate a difference in patterns using 3D clothes modeling software were shoulder line, the distance between shoulder points, armhole line, ease of armscye depth, and overall appearance. Because all the items fall under design lines which make up outer lines of a cloth, it can be said that the Qualoth program is good for representing design, rather than exposing a small difference in patterns.

• 기술혁신연구
• /
• 제31권3호
• /
• pp.171-199
• /
• 2023

본 연구는 K연구원의 상향식 R&D과제기획 차원의 신규 연구기획과제 선정평가를 위한 평가도구 개발에 목적을 두고 진행하였다. 이를 위해 CIPP모형과 연구기획평가를 위한 선정평가 및 평가지표에 관한 선행연구를 중심으로 R&D과제기획 선정평가 항목과 문항을 개발 한 후, 2회에 걸친 델파이 조사를 실시하였다. 개발된 평가도구는 13명의 전문가를 대상으로 설문조사를 실시하여 내용타당도, 합의도 및 수렴도를 검증하였다. 최종 선정된 R&D과제기획 선정평가 도구는 8개 항목에 총 21개 문항으로, 상황평가 5 문항, 투입평가 2문항, 과정평가 8문항, 산출평가 6문항으로 구성되었다. 개발된 평가 도구는 상향식 기획 과정상의 문제점을 해소하고 연구자들의 기획역량을 제고하는 데 기여할 것이다. 또한, 선정평가 시 평가에 대한 일관성과 효율성 제고에 기여할 것이다.

• 한국정밀공학회:학술대회논문집
• /
• 한국정밀공학회 1991년도 추계학술대회 논문집
• /
• pp.116-120
• /
• 1991

Technique of length measurement error is widely used in the accuracy assessment of CMMS(Coordinate measuring machines) and machine tools, as it is simple and direct measurement within the working volume of a machine. In this paper, a new method is proposed for the evaluation of the length measurement error in relation to the volumetric accuracy. lD, 2D, and 3D measuring lines are considered for recpective length measurement error: 1D, 2D, and 3D length measurement uncertainties are evaluated from volumetric accuracy. The relationship between the volumetric accuracy md length measurement error to is discussed. PC based system for length measurement error evaluation and simulation is developed.

• 한국가금학회지
• /
• 제29권4호
• /
• pp.287-292
• /
• 2002

This study was conducted to investigate the changes of pH, TBA, meat color and sensory evaluation on duck meat fed supplemental Bamboo vinegar during storage period at 4$^{\circ}C$ . Experiment animals (five-wk-old, Cherry Valley F$_1$, 100 chicks) were randomly assigned in four treatment groups. Treatments were control, 1%, 2% and 4% based on Bamboo vinegar addition. There was no PH difference in breast meat between groups on day 1 of storage, while pH of bamboo vinegar supplemented group was sustained hi호 after 3 days. TBA values of Bamboo vinegar treated groups were significantly lower than control group (P<0.05) and were steady change during storage. The color value in lightness no difference between groups during the storage. The control was significantly increased in 6 d and 9 d, while the bamboo vinegar treated groups no difference during storage. The redness and yellowness in bamboo vinegar treatment were decreased in 3 d and 9 d storage. The decrease in yellowness was outstandingly observed in bamboo vinegar 1% and 2% treatment (P<0.05). The odor in terms of sensory evaluation was improved by supplemental bamboo vinegar treatment. The significant differences were observed on 1 d, 3 d and 6 d storage (P<0.05). The appearance of sensory evaluation of supplemental Bamboo vinegar treated groups (P<0.05) was significantly different in 1 d and 3 d storage. The results of this study indicate that the supplemental Bamboo vinegar 1% and 2% may improve meat quality during storage period in duck meat.

• 한국자기학회지
• /
• 제26권3호
• /
• pp.105-114
• /
• 2016

삼각 섬유성 연골(TFCC) 손상 환자의 평가를 위하여 fat suppressed 3D fast spoiled gradient recalled T1 기법과 fat suppressed Isotropic 3D fast spin echo T1 기법을 이용하여 영상을 획득하였다. 정량적 평가를 위해 각각의 영상에서 signal to noise ratio 및 contrast to noise ratio 값을 측정하고, Mann-Whitney U 검정으로 두 기법 간의 통계적 유의성을 검증하였다. 또한 정성적 평가를 위해 영상의학의 2명이 각각의 영상을 관찰하여, TFCC의 형태, 영상 내 인공음영, 병변의 묘사 정도의 3가지 항목을 선정한 후 이를 4점 척도(0: 진단 불가, 1: 부족함, 2: 충분함, 3: 좋음)로 평가하였고, Kappa-value 검정을 이용하여 두 관찰자 간의 일치도 검증을 하였다. 영상획득에는 3.0 Tesla MR 장비와 8-channel RF coil을 사용하였다. 정량적 평가 결과, 모든 영상 단면에서 signal to noise ratio 및 contrast to noise ratio 값이 Isotropic 3D fast spin echo T1 기법이 높게 나타났으며, Mann-Whitney U 검정을 이용한 두 영상기법 간의 검증도 통계적으로도 유의하였다(p < 0.05). 정성적 평가 결과, 관찰자 1, 2 모두에서 Isotropic 3D fast spin echo T1 기법의 평가 결과가 더 높게 나타났으며, Kappa-value 검증을 이용한 두 관찰자 간 평가 결과의 일치도 검증도 통계적으로 유의하였다(p < 0.05). 결론적으로 TFCC 손상 환자의 자기공명영상 검사 시 fat suppressed Isotropic 3D fast spin echo T1 기법의 적용은 TFCC 병변의 감별에 보다 유용한 진단적 정보를 제공 할 수 있을 것이라 생각된다.

• 지질공학
• /
• 제33권1호
• /
• pp.151-167
• /
• 2023

본 연구는 LNG저장탱크가 설치될 느슨한 포화사질지반을 대상으로 개정된 액상화 평가법과 UBC3D-PLM 모델을 이용한 1차원 유효응력해석에 의한 액상화 평가법을 비교한 것이다. 이를 위해 여러가지 실내 및 현장시험을 실시하여 필요한 Parameter를 산정하였다. 검토결과, 지진응답해석결과와 SPT N 값을 이용하는 개정 액상화 평가법은 액상화 발생 가능성을 높게 평가하였지만, 다양한 액상화 저항인자를 고려할 수 있는 유효응력해석법은 액상화에 다소 안정한 것으로 분석되었다. UBC3D-PLM 모델을 이용한 1차원 유한요소해석을 할 경우 보다 간편하게 액상화 안정성 검토가 가능하였고, 액상화 보강 영역을 최소화 할 수 있었다. 또한, LNG저장탱크의 기초를 고려한 2·3차원 수치해석 시에는 액상화 발생 시 내진설계 및 거동특성을 규명하는 것에 활용될 수 있을 것으로 기대된다.