• Analytical Science and Technology
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• v.30 no.4
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• pp.167-173
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• 2017

In the era of the forth Industrial Revolution, open source code and open source hardware have gained much attention. In particular, 3D printing technology is expanding into the realms of classical science, technology and our daily lives. Relatedly, in the present study, we demonstrate the manufacture of a nano-LC MALDI spotter robot using 3D printing technology. The parts of the spotter robot were either made using a 3D printer or purchased as 3D printer parts from the 3D printer online market, so that anyone can make the robot without a deep knowledge of engineering or electronics, i.e., DIY (do-it-yourself) product. In the nano-LC MALDI spotter, the nano-LC eluent and MALDI matrix were mixed in a T-union and discharged from the capillary outlet. The eluent and matrix mixture could be spotted onto the movable MALDI plate. The MALDI plate was designed to translate in a two-dimensional space (xy plane), which was enabled by the movements of two stepper motors. In the paper, all computer-aided design (CAD) files for the parts and operation software are provided to help the reader manufacture their own spotter robot.

• Mass Spectrometry Letters
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• v.11 no.4
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• pp.95-102
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• 2020

In this study, we provide full descriptions of how to make a low-cost and completely open-source laboratory-made air sampler that will be used for sample adsorption for thermal desorption-gas chromatography mass spectrometry (TD-GC/MS) analysis. It is well known that harmful gases cause bad effects on human bodies, so it is necessary to identify the types and amounts of gases in industrial sites. One of the most commonly used methods for gas sampling is to utilize a sorbent tube using an air sampler. Commercially available air samplers are expensive, typically priced between $1,000 and $2,000, and their design often cannot be modified to fit the experiment. To address these shortcomings, we have developed a do-it-yourself (DIY) air sampler that is not only cheap enough, but also completely open-source. Furthermore, the performance of the fabricated air sampler was validated in conjunction with TD-GC/MS for the analysis of volatile compounds.

• Journal of the Korean Society of Costume
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• v.64 no.4
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• pp.176-187
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• 2014

Although DIY(Do-It-Yourself) clothes are not popular in Korea, they continually reflect emerging DIY trends. Previous studies have approached the technical aspect of DIY clothes or have considered them only as an aspect of consumption tendencies. The purpose of this study is to look into online communities to investigate distinctive elements, which form the DIY clothing culture. Participant observation of texts and pictures from the online community's postings about DIY was conducted and used for the analysis. Research results showed that personal and social factors motivated DIY clothes. Personal motivations are comprised of factors such as practical creativity and personal enjoyment. Practical creativity occurred when someone wished to express aesthetics and personality in DIY clothes; personal enjoyment refers to the pleasure and utility that one feels when one makes DIY clothes. The social motivations were comprised of factors such as a desire to show off and to expand social exchanges. The desire to show off involved wearing DIY clothes and then finding satisfaction from reactions of people who notice it. The "expansion of exchanges" was not only about sharing information about DIY clothes in an online community but also about distributing or giving real goods (materials or tools for DIY clothes and finished goods) as gifts. Furthermore, some "DIYers" made DIY clothes sustainable by pursuing economic feasibility as an additional motivational factor. When they had expertise and commercial traits, they established businesses in the form of independent creative firms, transforming themselves from productive consumers to producers.

• Journal of the Korean Society of Costume
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• v.53 no.3
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• pp.13-31
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• 2003

The purpose of this study is to analyze the formative style and aesthetic value of contemporary subcultural style with the understanding of characteristics of subcultural style in the sociocultural context. As for the research methodology, literary survey has been performed to study the concept and the history of subcultural styles from 1940s to 1980s. In addition, demonstrative studies on aesthetic images have been carried out through the analysis of pictures and photographs in order to categorize the subcultural styles since 1990s. In this study, subcultural styles since 1990s have been illustrated through the socio-cultural grounds. which are diversity of street culture, diffusion of moss culture or bubble-up phenomenon, pursuit of anti-social ideology among intellectual heads, club Cultures in the form of kitsch and pastiche and communal thinking as collective harmony. With the socio-cultural context examined above, subcultural styles in the contemporary fashion are categorized and deduced following aesthetic values ; Drag and Club style as the tendency of surrealists or artificial hedonists, Urban military style and Cyberpunks as pursuit of Bionic being, Sports casual style based upon, the pursuit of comfort and freedom, Vintage style and Retro dressing represented by the spirit of DIY (no It Yourself), Ecology style of New conservatives, and Mysticism style as the fusion of technology and shamanism (Technoshamanism).

• Transactions of the Korean Society of Mechanical Engineers A
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• v.41 no.7
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• pp.673-682
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• 2017

As the culture of making things based on "do-it-yourself" (DIY) activity is increasingly promoted, the use of recent digital technologies and tools, including the 3D printer, have become widespread. However, the use of computerized numerical control (CNC) engraving machine is considered difficult because of the complicated procedures and specialized knowledge required for its operation. Therefore, this study aims to resolve the issue that limits the usability of the CNC engraving machine. This paper presents a novel CNC engraving machine system for non-experts based on human-centered design. First, the size and type of the workpiece and tool are reduced. Second, computer-aided process planning (CAPP) steps such as tool path generation, workpiece clamping, and corresponding coordinate system are automated by compromising productivity and efficiency. As a result, a CNC engraving machine system that can be easily used by non-experts was developed. This development has great significance in that it opens up the possibility of using the CNC engraving machine for a wider range of DIY activities.

• The Journal of Korean Association of Computer Education
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• v.19 no.4
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• pp.1-9
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• 2016

From the influence of DIY (Do It Yourself) and the Maker Movement diverse areas in media, clothing, performing that requires physical computing. That is why the requests of teaching students about physical computing or using physical computing in education area has been increasing. Physical computing education is learning computational thinking by using programming activities, the usage of physical computing is still increasing. However, physical computing education became known recently with the lack of time to research, not only that the effectiveness in education is lacking as well. This research analysed the attitude and accomplishment from different gender of middle schoolers and high schoolers for one semester to see their ideas in programming and increase of designing algorithms.

• Asian Journal of Atmospheric Environment
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• v.9 no.3
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• pp.222-227
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• 2015

The environmental education with ideal teaching tools (e.g., a small-scaled experimental kit) is essential for raising the public's, especially student's, awareness of many environmental issues. This study was undertaken to develop a do-it-yourself model instrument of acid rain and estimating its applicability to the environmental education. Our novel model tool consists of a body (17 cm width, 6 cm depth, and 17 cm height), an acid gas injector, acid four rain reservoirs, and a drop supply pump. An alternative model instrument that can be more readily assembled was also suggested. Based on our novel approach, we carried out several model experiments with educatees (i.e., high school and college students, and adults). The results of questionnaires indicated that educatees achieved a very deep understanding of acid rain through an experienced model experiment. A 77 to 89% of educatees experienced the reappearance experiment of acid rain by our model instrument felt that it was very useful as a teaching tool of environmental education.

• Pediatric Gastroenterology, Hepatology & Nutrition
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• v.11 no.sup2
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• pp.1-10
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• 2008

When you present a medical scientific paper or give a lecture in English, It is important to visit your presentation room in advance to gain familiarity with the controls and the computer. You can check how to use the mouse or laser pointer and determine where the microphones are. You should meet the Chairman and introduce yourself. You may ask the Chairman any questions you have. I am confident this strategy will work for beginners because they are usually nervous before their presentations. Most Chairmen prepare one or two questions for the presenters to stimulate discussion. Speaking with the Chairman also allows you to determine the type of English that he or she speaks (i.e., French-English, Spanish-English, and British-English). You need to be comfortable with the Chairman's English before the presentation because the Chairman will repeat the questions for you when you do not understand a question from the audience. Although I have given a number of lectures and moderated many scientific sessions and symposiums in English over the past 20 years, it is still difficult and stressful for me to do these in English because English is not my first language. To overcome the problems, I have written down the questions and useful English expressions that I have received during or after my presentation because I found them helpful for my next presentation. I hope the examples will be of great help to you.

• Journal of the Korean Society for Industrial and Applied Mathematics
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• v.14 no.4
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• pp.275-284
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• 2010

Deliberate self-harm (DSH) is the act of deliberately harming your own body, such as cutting or burning yourself, without suicidal intent. It has especially become a problem among adolescents and college-age students in institutional settings such as boarding schools, Greek houses, detention centers and hospitals. We focus on contagion of DSH among adolescents and young adults by creating a deterministic epidemiological model. We study the impact of actual peer pressure, virtual peer pressure (the Internet) and treatment analytically in terms of a basic reproduction number through stability analysis of a system of ordinary differential equations. All parameters are approximated and results are also explored by simulations. The model shows that DSH is present in an endemic state in the population considered, and the control strategies are discussed.

• Information and Communications Magazine
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• v.31 no.7
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• pp.59-65
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• 2014

최근 사물 인터넷(Internet of Things)에 대한 관심은 가히 폭발적이라 할 수 있으며 주변의 모든 사물들이 연결되어 다양한 서비스를 제공하는 초연결 사회(Hyper Connected Society)에 대한 기대감이 어느 때보다 커지고 있다. 이러한 사물 인터넷을 활성화하기 위해서는 다양한 사물의 개발이 선행되어야 하는데 오픈소스 하드웨어를 이용하여 손쉽게 아이디어를 실현화할 수 있는 ICT DIY(Do It Yourself)는 중요한 역할을 할 것으로 판단된다. 그러나 ICT DIY로 개발된 디바이스가 인터넷이나 모바일 서비스와 연결되지 못하면 취미 이상으로 발전하기 어려우며, 이러한 상황을 극복하기 위해서는 다양한 IoT 플랫폼과의 연동이 필수적이다. 본 고에서는 현재까지 제안된 대표적인 IoT 플랫폼을 전용(proprietary) 플랫폼과 개방형(open) 플랫폼으로 구분하여 각각의 사례와 특장점을 분석하였다. 이를 통해 ICT DIY 개발이 단지 취미에 머물지 않고, 사물 인터넷의 중요한 접근 방안으로 인정받기 위해 IoT 플랫폼 기술을 어떻게 활용해야 하는지 살피고 향후 국내의 사물 인터넷 산업을 발전시켜 나갈 방안을 모색하고자 한다.