• 제목/요약/키워드: limitation of the visual representation

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수학교육에서 시각적 표현에 관한 소고 (A Study on the Visual Representation in Mathematics Education)

  • 이대현
    • 한국수학교육학회지시리즈A:수학교육
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    • 제42권5호
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    • pp.637-646
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    • 2003
  • Visual representation is very important topic in Mathematics Education since it fosters understanding of Mathematical concepts, principles and rules and helps to solve the problem. So, the purpose of this paper is to analyze and clarify the various meaning and roles about the visual representation. For this purpose, I examine the status of the visual representation. Since the visual representation has the roles of creatively mathematical activity, we emphasize the using of the visual representation in teaching and learning. Next, I examine the errors in relation to the visual representation which come from limitation of the visual representation. It suggests that students have to know conceptual meaning of the visual representation when they use the visual representation. Finally, I suggest some examples of problem solving via the visual representation. This examples clarify that the visual representation gives the clues and solution of problem solving. Students can apprehend intuitively and easily the mathematical concepts, principles and rules using the visual representation because of its properties of finiteness and concreteness. So, mathematics teachers create the various visual representations and show students them. Moreover, mathematics teachers ask students to design the visual representation and teach students to understand the conceptual meaning of the visual representation.

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직관의 즉각성 요인과 효과에 대한 고찰 (A Study on the Factors and Effect of Immediacy in Intuition)

  • 이대현
    • 한국수학교육학회지시리즈A:수학교육
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    • 제45권3호
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    • pp.263-273
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    • 2006
  • The purpose of this paper is to research the factors and the effects of immediacy in mathematics teaching and learning and mathematical problem solving. The factors of immediacy are visualization, functional fixedness and representatives. In special, students can apprehend immediately the clues and solution using the visual representation because of its properties of finiteness and concreteness. But the errors sometimes originate from visual representation which come from limitation of the visual representation. It suggests that students have to know conceptual meaning of the visual representation when they use the visual representation. And this phenomenon is the same in functional fixedness and representatives which are the factors of immediacy The methods which overcome the errors of immediacy is that problem solvers notice the limitation of the factors of immediacy and develop the meta-cognitive ability. And it means we have to emphasize the logic and the intuition in mathematical teaching and learning. Clearly, we can't solve all mathematical problems using only either the logic or the intuition.

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An Analysis on the Range of Singular Fusion of Augmented Reality Devices

  • Lee, Hanul;Park, Minyoung;Lee, Hyeontaek;Choi, Hee-Jin
    • Current Optics and Photonics
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    • 제4권6호
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    • pp.540-544
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    • 2020
  • Current two-dimensional (2D) augmented reality (AR) devices present virtual image and information to a fixed focal plane, regardless of the various locations of ambient objects of interest around the observer. This limitation can lead to a visual discomfort caused by misalignments between the view of the ambient object of interest and the visual representation on the AR device due to a failing of the singular fusion. Since the misalignment becomes more severe as the depth difference gets greater, it can hamper visual understanding of the scene, interfering with task performance of the viewer. Thus, we analyzed the range of singular fusion (RSF) of AR images within which viewers can perceive the shape of an object presented on two different depth planes without difficulty due to the failure of singular fusion. It is expected that our analysis can inspire the development of advanced AR systems with low visual discomfort.

차내 정보 시스템의 시각적 요구 평가를 위한 사용자 주도의 시각 차폐 기법 (A User-driven Visual Occlusion Method for Measuring the Visual Demand of In-Vehicle Information Systems (IVIS))

  • 박정철
    • 대한인간공학회지
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    • 제28권3호
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    • pp.49-54
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    • 2009
  • Visual occlusion method is a visual demand measuring technique which uses periodic vision/occlusion cycle to simulate driving environment. It became one of the most popular techniques for the evaluation of in-vehicle interfaces due to its robustness and cost-effectiveness. However, it has a limitation in that the vision/occlusion cycle forces the user to use the IVIS at a predetermined pace, while a driver decides when to use the device on his/her own in actual driving. This paper proposes a user-driven visual occlusion method for measuring the visual demand of in-vehicle interfaces. An experiment was conducted to examine the visual demand of an in-vehicle interface prototype using both the existing (system-driven) occlusion method and the proposed (user-driven) one. Two in-vehicle tasks were evaluated: address input and radio tuning. The results showed that, for the radio tuning task, there were significant differences in total shutter open time and resumability ratio between the methods. The user-driven visual occlusion method not only allows a better representation of drivers' behavior, but it also seems to provide more information on the chunkability of a task.

프로토타입 표현에 관한 연구 (A Study on The of Prototype Representation)

  • 옥영종;여정모
    • 한국정보통신학회:학술대회논문집
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    • 한국해양정보통신학회 2011년도 추계학술대회
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    • pp.721-724
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    • 2011
  • 프로토타입은 사용자의 요구사항을 분명히 표현하고, 이해의 격차를 줄이는 역할을 한다. 이러한 프로토타입은 다양한 산업현장 가운데서 유용하게 활용되고 있다. 하지만 기존의 대다수의 프로토타입 표현기법은 시각적인 표현에만 의존하고 있는 것이 현실이다. 이러한 시각적인 표현기법은 요구사항의 상세한 내용까지 표현할 수 없다는 한계점을 가지고 있다. 본 논문은 이러한 시각적인 표현기법의 한계점의 대안으로 정형화된 문자를 바탕으로 언어 형식의 표현기법을 제시한다. 문자를 바탕으로 표현되는 언어 표현 프로토타입은 요구사항의 상세한 내용을 표현 할 수 있으며, 개발 프로젝트의 관련자들 간의 의사소통을 유지하면서 개발과정에서 발생하는 수 많은 문제들에 대해 신속하게 대처할 수 있고, 개발과정의 문서화가 용이하여 소프트웨어 개발 향상에 도움이 될것이라 기대할 수 있다.

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Change Analysis of Forest Area and Canopy Conditions in Kaesung, North Korea Using Landsat, SPOT and KOMPSAT Data

  • Lee, Kyu-Sung;Kim, Jeong-Hyun
    • 대한원격탐사학회지
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    • 제16권4호
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    • pp.327-338
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    • 2000
  • The forest conditions of North Korea has been a great concern since it was known to be closely related to many environmental problems of the disastrous flooding, soil erosion, and food shortage. To assess the long-term changes of forest area as well as the canopy conditions, several sources of multitemporal satellite data were applied to the study area near Kaesung. KOMPSAT-1 EOC data were overlaid with 1981 topographic map showing the boundaries of forest to assess the deforestation area. Delineation of the cleared forest was performed by both visual interpretation and unsupervised classification. For analyzing the change of forest canopy condition, multiple scenes of Landsat and SPOT data were selected. After preprocessing of the multitemporal satellite data, such as image registration and normalization, the normalized difference vegetation index (NDVI) was derived as a representation of forest canopy conditions. Although the panchromatic EOC data had radiometric limitation to classify diverse cover types, they can be effectively used t detect and delineate the deforested area. The results showed that a large portion of forest land has been cleared for the urban and agricultural uses during the last twenty years. It was also found that the canopy condition of remaining forests has not been improved for the last twenty years. It was also found that the canopy condition of remaining forests has not been improved for the last twenty years. Possible causes of the deforestation and the temporal pattern of canopy conditions are discussed.

진실과 거짓 사이에서 이야기하기: 영화적 재현의 한계에 대한 인식론적 고찰 (The Story between Truth and Fiction: Epistemological Approach to Possibility & Limitation of the Re-presentation cinematographic)

  • 이성욱
    • 만화애니메이션 연구
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    • 통권32호
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    • pp.221-244
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    • 2013
  • 본 논문은 "재현"의 문제를 인식론적 측면에서 고찰하고자 한다. '실제 사건'에 대한 영화적 재현이 관념적으로 어떻게 받아들여질 수 있는지 인식론적 고찰을 통해 살펴보고자 한다. 영화이미지가 대상을 반영함에 있어 비가시적인 요소들까지 형상화한다는 특성을 감안할 때, 실제 사건에 대한 재현 문제는 늘 논란을 야기할 수밖에 없다. 주체적인 건 비주체적인 건 개인의 경험과 감각적 인식이 유사할 수 있으나 일치할 수 없으므로 '영화가 재현하는 진실'은 '진실' 그 자체로 성립하기 어려운 난점을 내포하고 있다. 대상은 현존하는 그 자체 그대로 반영되는 것이 아니라 카메라의 시선을 통해 축소되거나 확장될 수 있기 때문에 실제현실과 작가의 현실인식, 수용자인식 간의 차이가 발생한다. 그것은 수용자가 얼마나 작품의 진실성을 분리해서 볼 수 있는가 와는 별도로 수용자의 실제적인 관심이나 욕망 혹은 물리적 프레임에 밀착해 산출되는 매우 불안정한 간극이다. 이러한 간극은 실제 사건에 대한 재현의 한계를 부각시킨다. 본 연구는 이와 같은 한계를 선명히 하는 데 그 목표가 있다.

동양적 캘리그라피 기법의 특성과 활용에 관한 연구 (A Study on the Characteristics and Utility of Oriental Calligraphy Technique)

  • 김병옥
    • 디자인학연구
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    • 제16권4호
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    • pp.163-172
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    • 2003
  • 캘리그라피 기법은 요즘 동서양을 막론하고 다양한 분야에서 활용되어지고 있다. 광고, 패키지, 심볼마크, 로고타입, 영화포스터 등의 그래픽디자인 분야에서 심지어 현대추상회화에 이르기까지 현대인의 시각환경을 망라하고 있다. 이는 기호 및 운동표현으로서의 그 역동적이고 암시적인 표현력이 재인식되었기 때문이다. 기계적이고 인위적인 디지털환경, 획일적이고 공식화된 모더니즘적 경향에 대한 현대인의 이탈심리의 작용으로 동양적 신비감과 정서적 친근감을 갖춘 새로운 표현양식으로서 캘리그라피 기법에 주목한다. 따라서 본 논문은 캘리그라피의 역사를 조명하고, 특성을 이해하며, 현대회화와 그래픽디자인에 확장된 가치를 모색하여 시각언어와 표현양식의 확산에 기여하고자 한다. 또한 동양화적 기법과 재료, 캘리그라피 기법을 혼용한 캘리일러스트(Calli-Illust)에 대한 개념의 정립과 활용 가능성에 대해 탐색하여 일러스트의 영역을 확장하고자 하였다. 그 결과를 보면 캘리그라피 기법은 추상표현주의 회화의 한 양식으로서, 새로운 조형세계의 영역을 확장시킨 공헌을 하고 있으며, 다양한 디자인 환경 속에서 비판 없이 수용되었던 서구의 이성적, 합리적 그리고 기하학적인 기능주의 디자인 양식의 한계점을 타개할 새로운 표현양식으로 발전시킬 필요가 있음을 도출하였다. 또한 이전까지 캘리그라피의 개념에 포함되어 이해되었던 캘리일러스트에 대한 개념과 정치를 확보할 수 있었다. 캘리일러스트에 대한 연구는 이제 시작에 불과하다. 앞으로 보다 심도 있고 폭넓은 연구가 진행되어 커뮤니케이션 디자인에 다각적으로 적용될 수 있게 되길 기대한다.

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파스큐라의 미술론 (PASKYULA's Theory of Art)

  • 정주영
    • 미술이론과 현장
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    • 제5호
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    • pp.43-80
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    • 2007
  • PASKYULA was formed in September, 1923 through the union of artists involved in two art groups: Kim Ki-Jin, Kim Bok-Jin, Yeon Hak-Nyeon who had previously participated in the ToWolHoi, and Park Young-Hi, Lee Sang-Hwa, An Seok-Ju, former members of the BaeckJo. After its founding, the PASKYULA artists had been searching for the social function of art to reform the harsh reality of Minjung and the nation with criticism toward society as well as art world. Their art theory for MinJung could grow relatively ease in relation to changing social and political conditions in the early 1920s. In August, 1925, PASKYULA organized the Korea Artista Proletaria Federatio with the YeomGunSa, and laid the groundwork for Proletariat art movement which was regularized in the late 1920s. From PASKYULA up to the early state of KAPF, the theory of art advocated by Kim Bok-Jin and An Seok-Ju could be summarized as "art for MinJung". At that time, widely ranging discourses on MinJung, however, was spawned in art theory, because many intellectuals-including artists and writers-begun to pay more attention to MinJung, who emerged as one of the social forces after the Samil Independent Movement. Sometimes, MinJung was construed as the target of enlightenment from a negative viewpoint. On the other hand, several intellectuals under the influence of individualism asserted that the discussion itself on MinJung exerted an evil influence on art. In contrast of these cases, the PASKYULA artists including Kim Bok-Jin, An Seok-Ju perceived that MinJung had the potential to change society, and regarded them as "a creator of genuine civilization and art". In the PASKYULA artist's writings, the concept of MinJung was often overlapped with the meaning of the Choson nation suffering under colony. Although their concept of MinJung was transformed gradually into the proletariat as they were under the strong influence of socialism, it did not change that they grasped the realities of the whole Choson Peninsula through the proletarian consciousness. In the early state of PASKYULA, the methodology for social function of art was presented in a twofold manner. First of all, Kim Bok-Jin emphasized on the necessity of education to improve MinJung's way of life through art, and it was embodied by the organization of ToWol Art Workshop and public lecture. Also, he championed "the popularization of art", which was one of methods to distribute art to MinJung. According to the PASKYULA artists, art should be not art for art' sake but art for MinJung. That was why they advocated the convergence of art and MinJung's life. Especially Kim Bok-Jin affirmed a link between art and industry because he considered industry the field inextricably linked with MinJung's life. In this context, his idea could be read as the generalization and equalization within the framework of possession. Kim Bok-Jin thought that the social ramifications of capitalism deprived MinJung of their right to enjoy art, and emphasized the artist' social role to return the right to them. That is, the even distribution of art was mainly discussed than the contents of art in the half of 1920s. By 1925, the contents of art itself became an issue in the PASKYULA art theory, and it was based in realism. Kim Bok-Jin and An Seok-Ju insisted that art should be reflection of real life. At that time, realism acquired the representation of MinJung and the nation's realities not realistic style. In fact, the various Western art styles including Futurism, Constructivism, Cubism etc. were exploited in the PASKYULA's visual images. Western art, target of criticism on theory, was selectively adopted in the works which were produced by Kim Bok-Jin and An Seok-Ju. Kim Bok-Jin's MoonYeUnDong cover design was conceived of as the example in which Western art was adopted with it's ideology under the influence of MAVO, while Western art shown in An Seok-Ju's illustrations served as a decorative function in many cases. Especially, An Seok-Ju attempted the various styles of Western art simultaneously, which may be seen as representing that PASKYULA did not have a firm ideology for their style. Also, it can be read as showing his hasty zeal to overcome Western art rapidly. The wish to establish "art for MinJung" as soon as possible was accompanied with the will to jump over the all steps of Western art though it was superficial. This aspiration of PASKYULA was expressed through the mass media, which had the potential for communicating to MinJung. At this point, there was a significant disparity between PASKYULA and another art groups in the first half of 1920s. However, the PASKYULA's method on the basis of the mass media could not but have a certain limitation because of the medium's properties. Nevertheless, PASKYULA' attempts may be considered to be valuable in sense that they expended the boundaries of Korean modern art into the commercial art questioning the matter of the distribution for art.

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