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RISS 인기검색어
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- 저자 : 임진기 (검색결과 8 건)
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카메라 의존적 파티클 시스템을 이용한 실시간 빗줄기 렌더링
사실적인 비 시뮬레이션은 다양한 현상으로 인한 조건이 포함되어 있기 때문에 매우 어려운 문제로 취급되어져 왔다. 본 논문은 효율적인 실시간 비 렌더링을 위해 카메라에 의존적인 비 공간을 생성한 후, 빗줄기 텍스처를 사용하여 실시간 비 렌더링을 위한 알고리즘을 제시한다. 우선 카메라의 시야 절두체와 겹치는 가상의 구를 설정하고 구의 반지름과 중심점을 저장한다. 절두체의 near 면과 far 면을 구성하는 각 정점들을 찾은 후, 절두체를 이루는 나머지 4개의 면에 대한 벡터를 계산한다. 이후 각 파티클의 위치는 가상의 구 내부로 설정하고 4개의 면과 벡터를 비교하여 파티클을 절두체 내부에서 렌더링 되도록 한다. 또한 광원과의 관계를 고려하여 위치에 따른 파티클의 산란에 대해서 계산한다. 이로 인해 적은 수의 파티클을 사용하더라도 매우 많은 양의 빗줄기를 표현할 수 있어 효율적인 렌더링이 가능하다. 또한 광원과의 산란을 통하여 사실적인 렌더링 효과 또한 얻을 수 있다. 이를 이용하여 실시간 매체의 대표적인 예인 게임에서 좀 더 효율적으로 비가 내리는 장면을 표현할 수 있을 것으로 예상된다. Realistic rain simulation has been treated as a difficult problem because conditions due to various phenomena are involved. This paper presents an algorithm for real-time rain rendering using rain texture after creating camera-dependent rain space for efficient real-time rain rendering. The algorithm first sets up a virtual sphere that overlaps the camera's view frustum and stores the radius and center point of the sphere. After finding the center points and vertices of the near and far faces of the frustum, use them to obtain vectors for a total of 6 faces including top, bottom, left and right. After that, the position of each particle is set to the inside of the sphere, and the particle is drawn inside the frustum by comparing it with the vector on the six sides. In addition, the scattering of particles according to the position is calculated by considering the relationship with the light source. For this reason, even if a small number of particles are used, a very large amount of rain streaks can be expressed, and efficient rendering is possible. In addition, a realistic rendering effect can also be obtained through scattering with a light source. Using this, it is expected that the raining scene can be expressed more efficiently in games, a representative example of a real-time media.
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임진기 亞細亞聯合神學大學校 大學院 2000 국내석사
The purpose of this thesis is to analyze the passages related to the “suffering servant”, and the "Son of man" and to ascertain the historical authenticity and the theological meaning found in the text of Mark. From Wrede to the present, the tendency of markian studies is to be concerned for christology. Scholarship has a tendency to consider Jesus either as the “Son of God” and divine man or the “Son of man“. The direction of the scholars' christological study of Mark has the presupposition, that the hellenic concept of the divine man has influenced scholars or what is their position concerning the hellenic concept? The messianic key to Mark, as Wrede holds, is not a theological composition but a historical writing that records the achivements during Jesus' lifetime as messiah. His messianic work as the “suffering servant” becomes clear gradually. The term "Son of man" has historical authenticity as a term used by Jesus. The concept of the suffering servant appearing as the “Son of man” in Mark is based on the Old Testament, but the origin of the concept is God Himself. The term relating the “Son of man” to the suffering servant is based on the fact that Jesus Christ as the “Son of God” united the idea of the "suffering servant" (Is. 53:3-12) with “one like a son of man" (Dan. 7:13) within Himself-in His person and in His lifetime. The "Son of man" is a peculiar name that Jesus applied only to Himself. When Jesus used the name of the "Son of man", he understood the concept as including the mission of the suffering servant and the man of the divine glory. The idea of Jesus as the Messiah was not comprehended by in the Old Testament prophets, but in the New Testament the idea of the "Son of man" was combined with Jesus as the peculiar suffering servant. The christologies of “Son of God” and the “Son of man” are identical christologies. The “Son of God” refers to the public position of Jesus and the "Son of man" refers to His public service of redeeming sinners from sin as the “Son of God”. Thus, in the Christological meaning of the terms “Son of God" is filled with the meaning of His suffering as the “Son of man” (Mk 15:39). Therefore the christology of Mark is seen as the “Son of man”-the christology of the "suffering servant". Mk 8:27-10:45 is the heart of the book of Mark. In this passage the message of the cross related to the suffering of the "Son of man" is connected with discipleship. Discipleship is found in the “Son of man" christology. Mark speaks not only of the “Son of man” christology but also of the discipleship of Christ as the suffering servant. Thus the “Son of man” christology is connected with discipleship through the death on the cross of the suffering servant. Discipleship naturally follows as the message of the cross includes the suffering or discipleship is united with that message. In order to become a disciples one must repent and believe the message of the cross of God. In discipleship the message of the cross also includes the glory of the resurrection.
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Steam plasma를 利用한 폐플라스틱 가스화에너지 硏究
In recent years, the problem of plastic waste has greatly increased because of industrial growth. As a result, the amount of plastic waste in domestic area is approximately 4,250,000 ton in 2007. The ways of these plastic waste disposal are still mainly relying on landfill or partially incineration. So it has become a serious social problem due to the secondary environmental pollution. The technologies for producing oil from the plastic waste have been developed for a long period and currently some of them are at a commercialization stage. Pyrolysis is one of the major processes in treating plastic waste but still has some restrictions for the commercialization due to its economical problems associated with a systematic feed collection/disposal ways. Considering environmental problems, for example the increase in the charge for waste materials treatment and the limitation of disposal area, it is interesting that the plastic waste treatment by pyrolysis and gasification, which seems to be the safest process for converting feed waste to reusable resources, would be predominant in the near future. This study, is aimed to increase the amount of syn-gas products by using steam as plasma gas in plasma system. The obtained results are summarized as follows: 1. From the Analysis results of Elemental analyser, HDPE and Melamine resin are 100% combustible. Main components of HDPE are C and H and caloric value is 11,613 kcal/kg. The main components of Melamine resin are C, N, O and calorific value is 3,577kcal/kg. 2. From the TG-DTA analysis in began to decompose, HDPE is reacted by the 1st reaction actively in the temperature range of 300~500℃ and the finished 2nd reaction in the temperature range of 500~600℃. Melamine resin is decomposed through 3 stage reactions. At the 1st reaction weight of Melamine resin is reduced to 300℃, at the 2nd reaction its weight is reduced rapidly in the range of 300~350℃ and finally combusted mostly in the range of 350~650℃. 3. Theoretically syn-gas production rate is calculated. In the case of HDPE, its production rate is calculated to 51.6% at C/O=0.7 by use of Air, to 99.2% at C/O=0.7 by O2, to 99.2% at C/O=0.7 by steam. In the case of Melamine resin, its production rate is calculated to 60.6% at original sample by Air, to 80.7% at C/O=0.7 by O2, to 83.9% at C/O=0.7 by steam. The condition of syn-gas product is the best in 1000℃. 4. Theoretically syn-gas production rate is calculated. In the case of HDPE, its production rate is calculated to 95.6% for C/O=0.55 at 1200℃ by use of steam. In the case of Melamine resin, its production rate is calculated to 76.8% for C/O=0.60 at 1400℃ by use of steam. The ingredients contained in the Melamine resin, except the amount of N2, was calculated to be 89.3%. 5. For the experiment of syn-gas product increasing, syn-gas is produced 81.7% from HDPE at the C/O ratio of 0.55 and 60.2% from Melamine resin at the C/O ratio of 0.60. But from the other ingredients of Melamine resin, except N2, syn-gas is produced 81.9%.
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