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Technological trend of VR/AR maintenance training and API Implementation Example based on Unity Engine (VR/AR 정비교육의 기술동향과 유니티 엔진기반의 API 구현사례)

  • Lee, Jee Sung;Kim, Byung Min;Choi, Kyu Hwa;Nam, Tae Hyun;Lim, Chang Joo
    • Journal of the Korean Society for Computer Game
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    • v.31 no.4
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    • pp.111-119
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    • 2018
  • National agencies and corporations are making a lot of efforts to educate mechanics from high school to university and enterprise training center to train as skilled mechanic. but the theoretical training using textbooks and the training using equipment not used in the field did not provide proper maintenance training. And education using special equipment or assuming dangerous situation was very dangerous, so we were carrying out education with video or photo. In recent, there have been a number of cases in which effective training simulations have been researched and developed in order to experience situations and solve problems safely through simulation from simple maintenance to special maintenance by combining VR and AR. This paper describes the comparative study of the existing APIs such as Danuri VR, DisTi Engine and Remote AR for general purpose AR/VR contents. We also proposed a AR/VR API based on Unity 3D Engine for AR/VR maintenance contents. The API can be used for maintenance contents developers efficiently.

Evaluation of Hydrothermal Carbonization Characteristics for Solid Fuel Conversion of Cow Manure (우분의 고형연료화를 위한 수열탄화 특성 평가)

  • Seong Kuk Han;Moonil Kim
    • Journal of the Korea Organic Resources Recycling Association
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    • v.31 no.2
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    • pp.45-52
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    • 2023
  • As of 2020, 139,753 tons/day of livestock manure is generated. Most of the livestock manure is made of compost(75.3%) and Liquor(11.7%) and is spread on farmland. The compost and Liquor of these livestock manure are the main causes of water pollution. Therefore, it is necessary to convert livestock manure into energy. For this reason, hydrothermal carbonization technology was applied to evaluate the physical and chemical properties. Among livestock manure, cow manure was used. Through hydrothermal carbonization, it was confirmed that the HHV (Kcal/kg) of 3,101 kcal/kg of raw material rises to more than about 3,800 kcal/kg at 220℃ or higher. This result was judged to be influenced by carbonization through a clear trend of decrease in O/C and H/C ratios. As a result, the value of Bio-SRF was evaluated through hydrothermal carbonization of cow manure, and All other items except for chlorine showed satisfactory results.

The Effects of Artificial Balneotherapy on Osteoarthritis (인공 온천수가 퇴행성 슬관절염에 미치는 효과)

  • Park Rae-Joon;Han Dong-Wook;Park Chang-Gon;Lee Hyun-Kee
    • The Journal of Korean Physical Therapy
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    • v.15 no.2
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    • pp.131-145
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    • 2003
  • The purpose of this study was to evaluate effects of artificial balenotherapy on the with degenerative osteoarthritis were selected as the subject do this study among the patients with degenerative osteoarthritis having pains in their knees by the criteria of America Rheumatoid Association. And the randomly selected ten patients out of the twenty were classified as an artificial balenotherapy group and the other the Patients were in a control group. Ten individuals with degenerative osteoarthritis patients in the artificial balenotherapy group Participated in artificial balenotherapy Program four weeks from March 1st, 2003 to March 31st, 2003 in Daegu 00 hospital. Ten individuals with degenerative osteoarthritis in the control group did not receive Artificial Balenotherapy. The conclusions were as follows: 1. After 4 weeks of therapy, the score of WBC(p < 0.01), RBC(p < 0.01), HTC(p < 0.01) in the artificial blalenotherapy group were significantly decreased, compared with their scores in pre-intervention. 2.In the balenotherapy group, significantly increase $Na^{+}$ ion(P < 0.05), decrease K ion(p < 0.01), unchanged Cl ion scores were found, compared with their scores in pro-intervention. 3. The result of the substudy about the effects of artificial balenotherapy on the substances that have relations with the function of liver were following that artificial balenotherapy group, increased total bilirubin(P < 0.01), unchanged total Protein, Albumin, total cholesterol, GOT, GPT, ALP were found, compared with their score in pre-intervention. 4. The result of the substudy about the effects of artificial balenotherapy on the substances that have relations with the function of kidney were following that in the artificial balenotherapy group, reduced BUN(P < 0.05), and increased creatine were found. 5. The result of the substudy about effects of artificial balenotherapy on the knee pain visual analog score, knee's functional score, ADL score were following that in the artificial balenotherapy group, decreased VAS score(P < 0.05), increased ADL score(p < 0.01), unchanged knee's functional score were founf, compared with their scores of the pre-intervention. In conclusion, the result of this study suggest that artificial balenotherapy improved ADL score and reduced knee pain visual analog score of the patients with degenerative osteoarthritis. The result proposed that appropriate use of artificial balenotherapy improves the degenerative osteoarthritis

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