• Title/Summary/Keyword: Industrial AR

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A Study on HMD-AR based Industrial Training System for Live Machinery Operation

  • Lee, Beomhee;Choi, Jinyeong;Choi, Byunghoon;Lee, Jisung;Min, Byungjun;Cho, Juphil
    • International Journal of Internet, Broadcasting and Communication
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    • v.10 no.1
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    • pp.65-70
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    • 2018
  • As technological development is progressing recently, various technologies are actively being studied in the course of the 4th industrial revolution. So, even in the educational field, virtual reality and augmented reality technology are used in educational environments, but specialized additional equipment is required and the price is very expensive. Also, since a plurality of equipment are required for a large number of people, it is urgent to study the technology that can be effectively applied to the industrial education field. So in this paper, we propose an industrial training system for HMD-AR, MPEG-DASH and SOAP based HTTP based Live Machinery Operation using Smartphone to solve the problems of existing system.

Comparison of the antioxidant and anti-inflammatory activities of leaf extracts from grain amaranths (Amaranthus spp.)

  • Ji, Hyo Seong;Kim, Gayeon;Ahn, Min-A;Chung, Jong-Wook;Hyun, Tae Kyung
    • Journal of Plant Biotechnology
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    • v.49 no.1
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    • pp.99-105
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    • 2022
  • This study assessed the antioxidant and anti-inflammatory activities of leaf extracts from grain amaranths (Amaranthus spp.). Among all the extracts, the ethanol extract of Amaranthus cruentus leaves (Ar) exhibited the highest antioxidant activity, including the DPPH free radical scavenging activity and ORAC. In addition, Ar strongly inhibited nitric oxide production by suppressing the MEK/ERK signaling pathway in lipopolysaccharide-stimulated RAW264 murine macrophages. HPLC analysis revealed 13 polyphenolic compounds in the leaf extracts of grain amaranth and indicated that Ar contained more rutin than the other extracts. Taken together, these results show the impact of species diversity on the phytochemical contents and bioactivities of plant extracts and suggest that the nonedible parts, such as leaves, of A. cruentus should be considered for use as crude drugs and dietary health supplements.

Effect of Welding Parameters on Bead Shape, Microstructure and Hardness of Galvanized Steel Pipe Welds with GMAW (아연도금강관의 GMAW에서 용접변수가 비드형상과 미세조직과 경도에 미치는 영향)

  • Lim, Young-Min;Lee, Wan Kyu;Kim, Se-Cheol;Koh, Jin-Hyun
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.14 no.2
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    • pp.535-541
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    • 2013
  • The present study was carried out to investigate the effects of welding parameters such as current, voltage and shielding gases on the bead shape, microstructures and hardness. It was confirmed that bead height was lowered and bead depth was increased with increasing voltages while height, depth and width of beads increased with welding currents. The hardness of weld metals with Ar+10% $O_2$ and Ar+20% $CO_2$ was low due to the formation of grain boundary and polygonal ferrites while that of weld metals with Ar+2% $O_2$ was high due to the presence of acicular, bainitic and sideplate ferrites.

A Formalized Approach or Authoring Augmented Reality Contents (증강현실 콘텐츠 저작을 위한 정형화된 기법)

  • Seo, Jin-Seok
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.11 no.6
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    • pp.2219-2224
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    • 2010
  • Authoring AR(augmented-reality) contents not only takes too much time and cost, but also needs the help of professionals in the areas of computer science, VR(virtual reality), AR, 3D computer graphics, computer vision, etc. In this paper, we analyze the difficulties(inherent to developing AR contents) into three problems and present a formalized authoring approach for AR contents. The proposed approach is based on the Statecharts, which was originally designed for modeling real-time embedded systems. In order to apply he Statecharts to modeling AR contents, we defined the semantics of the Statecharts and various events for interaction modeling.

Construction of Skin Color Map for Resolving Hand Occlusion in AR Environments (증강현실 환경에서 손 가림 해결을 위한 피부 색상 정보 획득)

  • Park, Sang-Jin;Park, Hyungjun
    • Korean Journal of Computational Design and Engineering
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    • v.19 no.2
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    • pp.111-118
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    • 2014
  • In tangible augmented reality (AR) environments, the user interacts with virtual objects by manipulating their physical counterparts, but he or she often encounters awkward situations in which his or her hands are occluded by the augmented virtual objects, which causes great difficulty in figuring out hand positions, and reduces both immersion and ease of interaction. To solve the problem of such hand occlusion, skin color information has been usefully exploited. In this paper, we propose an approach to simple and effective construction of a skin color map which is suitable for hand segmentation and tangible AR interaction. The basic idea used herein is to obtain hand images used in a target AR environment by simple image subtraction and to represent their color information by a convex polygonal map in the YCbCr color space. We experimentally found that the convex polygonal map is more accurate in representing skin color than a conventional rectangular map. After implementing a solution for resolving hand occlusion using the proposed skin color map construction, we showed its usefulness by applying it to virtual design evaluation of digital handheld products in a tangible AR environment.

Augmented Visualization of Modeling & Simulation Analysis Results (모델링 & 시뮬레이션 해석 결과 증강가시화)

  • Kim, Minseok;Seo, Dong Woo;Lee, Jae Yeol;Kim, Jae Sung
    • Korean Journal of Computational Design and Engineering
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    • v.22 no.2
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    • pp.202-214
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    • 2017
  • The augmented visualization of analysis results can play an import role as a post-processing tool for the modeling & simulation (M&S) technology. In particular, it is essential to develop such an M&S tool which can run on various multi-devices. This paper presents an augmented reality (AR) approach to visualizing and interacting with M&S post-processing results through mobile devices. The proposed approach imports M&S data, extracts analysis information, and converts the extracted information into the one used for AR-based visualization. Finally, the result can be displayed on the mobile device through an AR marker tracking and a shader-based realistic rendering. In particular, the proposed method can superimpose AR-based realistic scenes onto physical objects such as 3D printing-based physical prototypes in a seamless manner, which can provide more immersive visualization and natural interaction of M&S results than conventional VR or AR-based approaches. A user study has been performed to analyze the qualitative usability. Implementation results will also be given to show the advantage and effectiveness of the proposed approach.

Effects of Acanthopanax sessiliflorus on Immune Cells such as Thymocytes, Splenocytes and Macrophages in Mice

  • Kim, Hyung-Woo;Kim, Gye-Yeop;Jeon, Byung-Gwan;Choi, Jeong-Sik;Jeong, Hyun-Woo;Cho, Su-In
    • The Journal of Internal Korean Medicine
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    • v.28 no.2
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    • pp.377-384
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    • 2007
  • Objective : Immune potentiation including activation of T cells, B cells, macrophages, and dendritic cells is known to play a key role in prevention and treatment of patients with cancer. In this study, we investigated the effects of Acanthopanax sessiliflorus (AR) on the immune system, especially on thymocytes, splenocytes, and macrophages. Methods : We investigated the effects of AR on proliferation of splenocytes in normal mice, and the effects on proliferation of splenocytes and thymocytes in tumor-bearing mice. In addition, the effect of AR on NO production using macrophages was investigated. Results : Treatment with AR accelerated proliferation of splenocytes in vitro. AR also accelerated thymocyte proliferation, but did not affect splenocytes proliferation in normal mice. In contrast, AR accelerated proliferation of splenocytes and thymocytes significantly in tumor bearing mice. In addition, NO production level from macrophages was elevated by treatment with AR. Conclusion : These results demonstrate that AR has anti-cancer activities and related mechanisms are involved in immune potentiation such as acceleration of immune cell proliferation and elevation of NO production level in macrophages. In addition, we also demonstrate the possibilities of AR as complementary and alternative medicine to standard anti-cancer drugs.

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A Study on Parents' View of the Augmented Reality Card Use for Pr e-School Education

  • Deng, Qianrong;Cho, Dong-min
    • Journal of Korea Multimedia Society
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    • v.24 no.6
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    • pp.838-848
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    • 2021
  • Parents' influence on children's development is generally considered essential. This paper attempts to explore the role of AR in preschool education from the perspective of parents, aiming to help parents better understand the impact of children's use of augmented reality in preschool education. The subjects were parents of children in the preschool age range (3-6 years old), and the experimental equipment was AR cognitive cards. In order to extract parents' views on AR, five parents were invited to conduct an experiment with their children using AR cognition cards, and then an open interview survey was conducted. In the second experiment, the answers obtained from the first experiment were sorted out and formed a questionnaire to conduct a closed-book survey. It shows that parents are satisfied with the characteristics of AR to assist their children's learning. At the same time, parents also value technology, usage management and playing environment. AR can stimulate children's learning initiative. Children like to use AR, AR is suitable for learning, make parents satisfied. But even if AR is suitable for learning, parents will control the time their children use it.

A Study on the Development of AR Content for Promoting Memory Learning -Nursing Education Learning Content (암기학습 증진을 위한 증강현실 콘텐츠 개발 연구 - 간호 술기 학습 콘텐츠 중심으로)

  • Suh, Donghee;Suh, Eunyoung
    • Journal of Industrial Convergence
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    • v.19 no.1
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    • pp.79-85
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    • 2021
  • The purpose of this study was to investigate the existing augmented reality (AR) contents in education and to develop digital AR contents to promote the learning outcomes in nursing skills education. AR contents has been widely used in education such as children's books, coloring, or exhibition experiences, but rarely developed in nursing education. We wanted to develop AR contents on nursing skills which required memorization of complex contents. In order to improve nursing students' memorization skills, we developed AR techniques holding and executing cameras along with game elements of time and points. In order to give the effect of placing objects in front of the user's eyes, an augmented reality camera was applied, and a total of 40 levels were created to produce the sequence of nursing techniques. This study showed that learning contents in the medical field requiring expertise could be implemented as AR contents. The content developed in this study will be used as a learning aid for nursing students.

Application of Object Modeling and AR for Forest Field Investigation (산림 현장조사를 위한 객체 모델링과 AR의 활용)

  • Park, Joon-Kyu;Oh, Myoung-Kwan
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.21 no.12
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    • pp.411-416
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    • 2020
  • Field investigations of forests are carried out by writing measured data by hand, and it is a hassle to reorganize the results after a field survey. In this study, a method using object modeling and augmented reality (AR) was applied in a test forest to increase the efficiency of a field investigations. Using a 3D laser scanner, data on were acquired 387 trees within an area of 1 ha at the study site. The coordinates, height, and diameter were calculated through object extraction and modeling of a tree. The proposed can reduce the time required to acquire data in the field and can be used as basic data for building related systems. In addition, the modeling results of trees and a survey using GNSS and AR techniques can be used check coordinates, labor, and attribute information, such as the chest height diameter of the trees being surveyed in the field. The shortcomings of the survey method could be improved. In the future, the method could greatly improve the efficiency of tree surveys and monitoring by reducing the manpower and time required for field surveys.