• 한국조경학회지
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• 제26권3호
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• pp.312-320
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• 1998

The purpose of this study is to investigate and compare the validity of various visual simulation methods with or without sounds and videos of the landscapes The landscape evaluation through such media as color slide, color slide with sounds, video and video without sounds are compared with on-site evaluaton of the landscape. The results are as follows : ·Video can generally convey the feelings for the real landscapes better than traditonal mathod, i.e., slide without sounds. ·When the sources of sounds are dominant in the view, there are great differences in responses among 4 different media and video can convey the feelings for real landscapes on site most successfully. ·There are slight differences by landscape types ; in mixed landscapes, there are higher correlations between the on-site estimaton and estimations through media ; in natural landscapes, video can reflect the feelings for real landscapes on site better. ·There is little difference between two shooting methods, fixed shot and pan shot. These results suggest that traditional visual simulation, with slides or photographs, could not reflect the real landscapes in certain situations and the visual simulation method with sounds and videos should be used in such situatios to represent the real landscape better. Especially, when the whole and comprehensive evaluatio of the landscape properties is important, the visual simulation with sounds and videos should be used. And simulation techniques with sounds and videos should be further developed for practial applications.

• 한국공작기계학회논문집
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• 제14권5호
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• pp.55-61
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• 2005

In this paper, we propose the visual simulation system for virtual reality motion rider system. The visual simulation system can apply verity virtual reality system. This paper deals with programs on 3D automatic creation of terrain, road design, and a realtime rendering program for the virtual reality system. For the 3D automatic creation of terrain, DEM data and rectangular grid method are applied. We can make two different road object with the road design program. One of them includes road definition, and the other is obtained by using 'NURBS curve.' Visual simulation is consisted by additional modeling and real-time rendering. We can apply the programs made in this way to visual system of driving simulator.

• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2008년도 제30회 춘계학술대회논문집
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• pp.25-30
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• 2008

본 연구에서는 Visual C++프로그램을 이용하여 램젯엔진시뮬레이션을 위한 코드를 생성하였다. 연구에 사용되어진 램젯엔진은 이상적인모델로 가정하였다. 우선, Visual C++에의해 만들어진 GUI프로그램을 이해하기위해 기초이론을 설명하였다. 주변에서 흔히 구할수 있고, 사용이 용이하며, 빠른계산이 가능한 Visual C++프로그램은 특히 GUI프로그램을 DOS Mode에서도 사용할 수 있게 해준다. GUI프로그램은 엔진흡입구의 초기입력값만 넣어주면, 나머지 스테이션의 초기입력값은 이 프로그램에 의하여 자동으로 계산되어진다. 이 프로그램의 결과는 널리사용되어지고 있는 상형툴인 GASTURB9의 결과와 비교하여 타당성을 검증하였다.

• 한국조경학회지
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• 제26권4호
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• pp.1-13
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• 1999

Previous research for visual assessment of streetscape employed static simulation methods to represent future landscape. However, streetscape is experienced sequentially, and thus dynamic simulations can be more effective. This study tried to adopt computer animation in the evaluation of streetscape, and examined its effects and possibilities. Three development scenarios for the redevelopment districts of Sokong-Ro and Banpo-Ro in Seoul were designed, and simulations were produced by three methods-photo-retouching, computer still image, and animation. A preference questionnaire was asked to 69 university students, and the effects of simulation methods on visual preference were examined. In addition, the frames of the animation were reclassed to identify the visibility of physical elements. The relationships between the visibility and visual preference were analyzed. The results showed that visual preference can be explained by three factors-Amenity, Tidiness, and Variousness-that account for 62.4% of the total variance, and the Amenity showed the highest proportion: 36.0%. Among the three simulation methods, animation showed the largest difference in preference for the most important factor(Amenity), and yielded the highest correlation between visibility of physical elements and Amenity. This result demonstrated that dynamic simulations can provide more accurate observation of visual changes, especially because the simulated landscape is experienced sequentially. The results also revealed that the sequential change in the visibility of physical elements can be examined easily and precisely by animation. This benefit of animation enables analysts to identify the points where the landscape varies the most, and thus visual preference should be evaluated.

• 농촌계획
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• 제11권2호
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• pp.59-69
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• 2005

Because of increasing numbers of cars many highways are being constructed lively, and the noise of passing cars has influenced surrounding areas. In consideration of this, some alternatives and researches for soundproof facilities are proceeding, but aesthetic approach hasn't been considered. Therefore, this research is focused on soundproof effects for each types, effectual simulation methods, visual assessment and estimation between the landscape before simulation and the landscape after. Soundproof facilities are divided largely by the soundproof barrier, the soundproof mounding, the soundproof grove. The soundproof grove has three main function. First, leaves and branches absorbs sound vibrations. Second, leaves absorbs sound, and branches obstruct sounds. Third, by means of sounds of shaking leaves, forest can offset noises. This research was proceeded by means of classification of soundproof grove types and investigation of visual simulation methods. We made visual simulation for each types, and estimated the landscape for each types.

• 한국조경학회지
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• 제27권4호
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• pp.80-86
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• 1999

The purpose of this study was to suggest a case study and anlaysis of the visual impact in dam construction through visual impact assessment method in Dong-sang river. The results can be summarized as follows; 1) For the evaluation of the visual impact of dam construction, five steps such as field analysis of visual status, finding visual sensitivity area and visual control point, making visual simulation material and evaluation, and visual impact analysis and assessment were suggested as desirable. 2) In the case study, the visual impact of dam construction was evaluated to be simple, unique, modern, static, cool and unfamiliar. 3) There was a few difference between the pre-construction and post-construction in statistical test. Especially, The dam in Man-Jee area was evaluated to be artificial, unique and destroyed in statistical difference, and then we design dam structure with visual friendliness. 4) In conclusion, there was high correlation between pre-construction landscape and post-construction landscape through semantic differential scale method using eleven adjectives. Therefore, we state that there is no visual impact for the dam construction for the moment.

• 한국조경학회지
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• 제35권2호통권121호
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• pp.55-63
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• 2007

The purpose of this study is to create a planting design for progressive realization. For this, visual preferences as measured via questionnaire were evaluated by the Scenic Beauty Estimation(SBE) and paired comparison methods. The results can be summarized as follows. Through photo observation, the average visual blockage ratio was 38% and the range of degree of the visual blockage ratio was $30{\sim}50%$. The sketch simulation and filtered pattern received the highest preference score and fumed out to be the most practical pattern out of all the patterns evaluated. Also, in the sketch simulation, the high preference values were observed for a distance of 9 to 12m from the view point to the blockage tree with a D/H ratio of 2. The preference score significantly decreased with the increase of the visual blockage ratio having a turning point at $30{\sim}35%$ of the visual blockage ratio, even though the distance parameters were more important than the visual blockage ratio in the scores. An outstanding view must be handled properly to be preserved or accentuated. Framed, open, enclosed, screened or filtered pattern views should be completely revealed only from their best vantage point, not given away at first glimpse. It this sense, parallax spatial beauty with trees could be improved through the visual aspects of plan arrangements and seems to be an effective design technique for landscape planning and planting design.

• 한국정보과학회논문지:컴퓨팅의 실제 및 레터
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• 제5권5호
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• pp.595-610
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• 1999

본 논문에서는 기존 실시간 객체행위 설계기법에 의해 개발된 객체행위챠트의 설계의미를 검증 확인하기 위한 시각적 시뮬레이션 도구를 제안한다. 이 도구의 특징은 실행 가능한 시뮬레이션 기계 즉, 확장된 유한상태기계 생성에 의한 객체들간의 동적인 상호작용을 시각적으로 시뮬레이션할 수 있게 하며, 실제 시스템 구현에 앞서 시각적 객체행위챠트에 여러 가지 논리적, 시간적 문제들을 검출할 수 있게 하는 것이다. 이를 위해, 이 도구에서는 시각적 객체행위챠트로부터 LOTOS 정형명세를 자동으로 생성한 다음 그 명세를 확장된 유한상태기계로 변환한다. 이 도구는 Visual C++ 버전 4.2로 개발되었으며, 현재 PC 윈도우95 환경에서 수행된다. 그리고, 특별히 시뮬레이션을 위해 LOTOS 정형성을 이용하였는데, 이것은 LOTOS의 통신 프로토콜 표현력이 다른 정형언어들에 비해 우수성이 있기 때문이다. 본 연구는 방법론 기반 시각모델과 정형기법 기반 시뮬레이션 기술의 연결이라는 점과 시각모델의 자동화된 검증 확인 기술의 실현이라는 점에서 기여한다.

• 설비공학논문집
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• 제21권1호
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• pp.9-15
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• 2009

There are various types of energy simulation tool to predict both thermal load and energy use. However, the problem about these software is that they have too much input variables and need expert with skills to run the simulation. Therefore, the purpose of this study is to develop the thermal analysis simulation program with input variables which eliminates coordinates of building components instead of using full coordinates by using DOE2. Since the simulation engine of the program is DOE2, the validity of S-DOE is performed by comparing peak heating and cooling load results with VisualDOE and annual energy use results with actual energy use of 1996. The results have shown that there are little difference between VisualDOE and S-DOE. Also it showed that there are little difference between actual energy use and S-DOE energy use results. S-DOE took less time to model a building than VisualDOE. These results reveals that the application of S-DOE have potentials in accurately predicting both energy load and energy use of the building and still have an advantage of taking less time to model a building.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2009년도 추계학술대회
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• pp.38-39
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• 2009

시뮬레이션 가시화 기술은 사용자가 직접 접하게 되는 기술이며, 시뮬레이터 사용자들은 보다 빠르고, 보다 현실적이며 보다 직관적인 영상을 요구하고 있다. 컴퓨팅 기술 및 영상장비 기술 등의 하드웨어는 우수한 성능으로 발전된 반면, 현재 일반적으로 선박 운항 시뮬레이터에 사용되고 있는 그래픽 렌더링 엔진은 그 한계를 나타내고 있다. 이러한 배경에서 본 논문에서는 예부선 시뮬레이션 시스템의 가시화툴 위해 필요한 시스템의 요구사항을 도출하고 상용 및 공개용 그래픽 렌더링 엔진에 대한 조사/검토하고, 시스템 요구사항을 만족시키기 위한 그래픽 렌더링 엔진의 장단점을 분석하여, 향후 그래픽 렌더링 엔진의 활용가능성을 평가하였다.