• International Journal of Internet, Broadcasting and Communication
• /
• v.15 no.1
• /
• pp.211-221
• /
• 2023

After COVID-19, various metaverse platforms for online lectures are being provided. Most of the classrooms are tiered type, and they are divided into intensive classrooms and open classrooms depending on the shape of the classrooms. Intensive classrooms provide a one-sided lecture format, so there are many difficulties in conducting communication-based classes that carry out team missions like PBL classes. In this study, we propose a metaverse classroom that applies the functions of a multiplayer online role-playing game (MMORPG), one of the game genres suitable for PBL classes. The proposed system provides various interaction techniques for PBL classes. We evaluated user satisfaction when this was applied to actual classes. As a result of the evaluation, it was found that users preferred text and voice chatting more than video chatting and solving missions like games was very helpful in online classes.

• Safety and Health at Work
• /
• v.4 no.4
• /
• pp.187-196
• /
• 2013

Background: Health, safety, and well-being (HSW) at work represent important values in themselves. It seems, however, that other values can contribute to HSW. This is to some extent reflected in the scientific literature in the attention paid to values like trust or justice. However, an overview of what values are important for HSW was not available. Our central research question was: what organizational values are supportive of health, safety, and well-being at work? Methods: The literature was explored via the snowball approach to identify values and value-laden factors that support HSW. Twenty-nine factors were identified as relevant, including synonyms. In the next step, these were clustered around seven core values. Finally, these core values were structured into three main clusters. Results: The first value cluster is characterized by a positive attitude toward people and their "being"; it comprises the core values of interconnectedness, participation, and trust. The second value cluster is relevant for the organizational and individual "doing", for actions planned or undertaken, and comprises justice and responsibility. The third value cluster is relevant for "becoming" and is characterized by the alignment of personal and organizational development; it comprises the values of growth and resilience. Conclusion: The three clusters of core values identified can be regarded as "basic value assumptions" that underlie both organizational culture and prevention culture. The core values identified form a natural and perhaps necessary aspect of a prevention culture, complementary to the focus on rational and informed behavior when dealing with HSW risks.

• Korean Journal of Computational Design and Engineering
• /
• v.6 no.1
• /
• pp.1-8
• /
• 2001

We developed an on-line lathe simulator which can be used for a CAM education on the internet. Previously, VRML or static images such as JPG have been commonly used to achieve the same goal. With the 3D tool like VRML, it was possible to describe the movement of 3D object effectively. However, G-code based modeling and real-time visualization for the cutting process including parts being machined could not be accomplished. By using the simulator, we can machine a part with G-code input from a user or modeler, and parts being machined can be visualized in 2D as well as 3D. The developed system is based on EMCO lathe from Eshed and can be used through a web browser.

• Carbon letters
• /
• v.4 no.3
• /
• pp.117-120
• /
• 2003

Asbestos is being replaced throughout the world among friction materials because of its carcinogenic nature. This has raised an important issue of heat dissipation in the non-asbestos brake pad materials being developed for automobiles etc. It has been found that two of the components i.e. carbon fibres as reinforcement and graphite powder as friction modifier, in the brake pad material, can playa vital role in this direction. The study reports the influence of these modifications on the thermal properties like coefficient of thermal expansion (CTE) and thermal conductivity along with the mechanical properties of nonasbestos brake pad composite samples developed in the laboratory.

• Korean Journal of Oriental Medicine
• /
• v.14 no.1
• /
• pp.33-40
• /
• 2008

Revising 11 historical topography of Jecheon city we could notice that this territory was traditionally producing high quality medicinal plants. This view is supported as it was tributed to the King. Production of medicinal plants continue these days, Jecheon being one of the largest production of medicinal plants in Korea. Abundant production of diverse medicinal plants of high quality seems to be linked with the soil, climate and environmental characteristics unique of Jecheon. Therefore we propose to develop new type of herbal medicin drugs like Gobang(膏方) which could distinguish from other places. Gobang matchs well to the requirement of current days being convenient to carry and of good taste. Also is appropriate to treat chronic diseases. Its primordial abundant herbal medicines of high quality for the development of Gobang where Jecheon can provide.

• Journal of Multimedia Information System
• /
• v.3 no.3
• /
• pp.69-76
• /
• 2016

Currently, research on more convenient and safer cars for drivers and passengers, the intelligent cars, are being actively conducted. The researches involve designing systems that intelligently minimize physical damages caused by car accidents, not just pursuing passive safety measures like airbags or safety belts. However, there are many cases around the world where airbags cannot be activated in times of accidents and it is difficult for consumers to check if their airbags will be activated, especially for the old-style cars. Thus, in this paper, a base technology for an application that can determine whether the airbags will actually be actuated at a critical moment based on the mechanical calculations is being introduced.

• Speech Sciences
• /
• v.7 no.3
• /
• pp.53-68
• /
• 2000

Although Korean stops and affricates show a three-way contrast of phonemes into lax, tense and aspirated, Korean fricatives have only two types, so-called 'lax' and tense. Considering that all the other obstruents maintain a three-way distinction but fricatives, it might be interesting to investigate whether the lax fricatives are really 'lax' in their phonetic and phonological realizations, as assumed. From an acoustic analysis, I found that Korean lax fricatives had a heavy aspiration along with a high pitch for the following vowel, being more comparable to the aspirated category. By contrast, their durational properties were found to be short, or lax-like. In other words, Korean lax fricatives are phonetically neither lax nor aspirated, but both. This dual nature of the lax fricatives takes a better account of the fact that why lax fricatives are subject to tensification, but not aspiration phonologically. Is that simply because there is no aspirated fricative in Korean? I suggest that Korean lax fricatives undergo tensification because of their being short in duration, and that they are not subject to the aspiration rule because they are indeed aspirated sounds.

• Journal of the Korea Safety Management & Science
• /
• v.16 no.4
• /
• pp.343-349
• /
• 2014

Many systems using RFID/USN were and are being developed. Some systems are used in practice and some are not. Generally, the main reasons not being used are: The prices of chips are too high considering the effects. The application domain is not appropriate for RFID/USN. So, various skills for higher sensing precision have been introduced like using multiple sensors and avoiding metals which deter sensings seriously. Now, it is time to evaluate systems which were developed using RFID/USN technology. However, no systematic approach has been made for the evaluation. In this paper, a framework using BSC is introduced for the evaluation of systems using RFID/USN. In this framework, some Critical Success Factors(CSF) are derived and some Key Performance Indices(KPI) are developed for each CSF.

• Journal of the Korean Society of Safety
• /
• v.31 no.6
• /
• pp.84-92
• /
• 2016

Since the mankind started its space mission, the number of artificial space objects has been increasing exponentially. It contains not just the space machines which are in use but the machines which are out of order. Meantime, those dead machines are being a serious danger, a real threat to human's lives and property because of it could re-enter into the earth's atmosphere and fall to the ground causing mega-disaster. As the number of space activities gets growing so far, the re-entry of the space objects will be a lot more happened in the future. Therefore, not just natural space object like asteroids but the artificial space object like artificial satellite and space station can cause the disaster by falling to the ground. To protect our nation and our property, the government has set up the space disaster management center in Korea astronomy and Space science Institute. In this study, we surveyed public's recognition of the space object's re-entry situation and analyzed it to contribute building national space disaster management policy.

• The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
• /
• v.14 no.2
• /
• pp.146-153
• /
• 2001

Clinical studies were done treated 5 cases of patients with tinnitus, who were treated at Dept. of oriental Oph. & Otolaryngology in the hospital of Dongshin university, Kwhang-Ju, Korea, 1 2001-2. 2001. The results were as follows 1. Explaining of ear ringing, two patients said that it's like twittering and each others variously said that it's like sounds of wind or crisply 2. The periods of a contraction are different to 4 years from 3 days, also the periods of a treatment are different to 8 weeks from 3 days. But it can't be a definition of a treatment period because of stopping treatments according to cases 3. Headache, dizziness, bradyacusia are chief symptoms being caused with tinnitus at the same times. Besides, general body weakness and syncope can he caused with tinnitus. 4. In a treatment by acupuncture, needles arc fixed at TE-17(翹風), G-31(風池), SI-19(聽宮), G-2(聽會) and kanjenggyuk(肝正格), Sinjenggyuk(腎正格) according to patients. 5. Chengshimyunjatang(淸心蓮子湯), Mihudodyungsikjatang(미후도등식장탕) can be prescribed according to physical conditions of patients. 6. After treating to becom 'Excellent' was two occasions, to become 'Good' was two occasion and to become 'Poor' was two occasions. So $60\%$ of became better them before.