• Journal of the Korean Society of Safety
• /
• v.17 no.1
• /
• pp.45-53
• /
• 2002

The purpose of this study was to investigate effect of electrical noise on malfunction of the earth leakage circuit breaker. A three-way experiment for studying its malfunction was conducted, in which electrical products such as radio, alternating current are welder and cellular phone, distance from the earth leakage breaker to electrical products, and whether or not the earth leakage breaker is contained is contained in the steel box were employed as experimental variables. Eleven earth leakage breakers frequently used in real situations were tested in each experimental treatment. The electrical products were used for generating electrical noise that is known to be able to cause malfunction of the earth leakage breaker. The results showed that except a case for one of the 11 earth leakage breakers when the radio made by M company was located 30 cm ahead of the breaker, malfunction did not occur in any other experimental treatment. Consequently, it is suggested that the breaker should be normally used for preventing electricity-related accidents without fear of its malfunction in industrial sites.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.13 no.6
• /
• pp.2743-2750
• /
• 2012

The SDI technology can transmit video, audio and control data with a coaxial cable. The compatibility of HD-SDI Camera is very important. The SDI devices and products without compliance problem are able to guarantee interaction. The HDcctv Alliance has released the standard by classifying the attributes of the SDI devices and products. It is important for each SDI devices and products to keep the compatibility of this standard. In this paper, the camera system that comply with the HDcctv Standard was implemented. In order to receive certification of HDcctv Alliance, the experiment was performed and the satisfied result was gained.

• Journal of the Korean Society of Costume
• /
• v.60 no.3
• /
• pp.56-65
• /
• 2010

It is time to create an image of Korea that uniquely defines and represents the nation to the world, by incorporating Korean traditions with the cultural industry. To this end, it is important to see the beauty of Korean tradition from an academic perspective and further explore its utility from an industrial viewpoint. This study is intended to design uniforms for employees in Korean restaurants at hotels or docents in Korean-styled museums. In doing so, we eyed on Baeja, a Korean traditional vest as the cultural archetype, and created cultural products. As our archetype, we chose two pieces of Baeja : one excavated from the tomb of Suryun Sim (1534-1589) which is displayed in the Gyeonggi Provincial Museum, and the other from Byeon of the Jeonju Lee family (1636-1731) in Suk Joo-Sun Memorial Museum at Dankook University. We also adopted Dapho with a Korean traditional vest with long length. Based on these cultural archetypes, seven products were developed. With the traditional food and way of living in Korea being more and more recognized in the global stage, it would be continuous creation and development of cultural contents with history and story rooted in the cultural heritage of the nation that could enrich our culture by bringing traditions back to the modern days to incorporate the past into the present. It is important to restore traditions when developing cultural products. However, it is also critical to commercialize ideas with stoη and creativity in the market for cultural products.

• Journal of the Korean Society of Safety
• /
• v.11 no.1
• /
• pp.53-59
• /
• 1996

To protect the damages or the disasters caused by overheating of industrial electric equipments or electric home appliances, a temperature sensitive thermal fuse is generally used in those equipments. Thermal fuses cutoff the current flow when the temperature of the electric equipments are abnormally overheated and over the certain temperature. Therefore thermal fuse is one of the most important elements in the sense of safety. Thermal fuses are classified into two types according to thermally sensitive materials, a low temperature melting alloy and an organic chemical compound. Domestic products of thermal fuses are now only with an organic chemical compound. Domestic products tested by using cutoff test and aging test etc. are satisfied UL specification. It's shown that the accuracy and the precision of the domestic products are as good as those of the overseas products obtained UL mark. However, some of domestic products show the reclosing problem which is mainly related the safety. This problem should be solved to make the reliable thermal fuses. In this paper, our Interest is to find out the causes of reclosing. In the comparison between thermally sensitive materials occurred reclosing and those occurred no reclosing, the test effects show that the characteristics of emitting heat and absorbing heat are different.

• Journal of the Korean Institute of Oriental Medical Informatics
• /
• v.13 no.1
• /
• pp.1-13
• /
• 2007

Korean medicine industry general means all industry activities related to Korean medicine. It covers material resources such as herbs and products made herbs, medical instruments, Korean medical servics and related information service based on Korean medicine theories. Also according to industrial strategy, Korean medicine industry was to define and branch. The industrial strategy of Korean medicine industry was based on kowledge, high-end, intensive techology, and global denand. By the industrial strategy of Korean Medicine industry, a study on the optimal industry construction of Korean medicine industry was standardizaition in the basic research and promoted bouds, efficiency in the group industrial, detention of global fund and global technology, and intenational division of product process. It is the optimal industry construction of Korean medicine industry by the industrial strategy of Korean medicine industry. At once adjustment to the optimal industry construction of Korean medicine industry by the industrial strategy of Korean medicine industry was internationalization in the positive adjustment.

• Magazine of RCR
• /
• v.16 no.3
• /
• pp.39-44
• /
• 2021

• Journal of the Korean Applied Science and Technology
• /
• v.32 no.1
• /
• pp.116-126
• /
• 2015

The present study utilized a shuttle mechanism of wet chemical absorption using MEA. In addition, industrial by-products containing a large amount of inorganic alkali substances were utilized for wet carbonization process. Chemical pretreatment of industrial by-products extracted calcium ions. ICP result of calcium ion was obtained up to 17,900 ppm(17.9%) by acidic substance. And also, In this work, 94% of recovery rate was obtained using wet MEA absorption process from $CO_2$ flow at the ambient condition. Through the liquid carbonation process, a sludge was fixed with rate of 0.175 mg of $CO_2$ per mg of sludge. It was found from XRD results that the structure of final product was composed of a calcite structure which is general structure of $CaCO_3$.

• Journal of the Korean Recycled Construction Resources Institute
• /
• v.1 no.1
• /
• pp.58-66
• /
• 2013

This study investigated quality properties of alkali activated cement free mortar using industrial by-product such as cement kiln dust(CKD), silica fume(SF) and quartz sand powder(SP) to compare with previous research about blast furnace slag(BS) and fly ash(FA). The results were as following. All materials were effective to increase compressive strength, however they showed different tendency on flowability. CKD and SP increased flowability, but on the other hand SF did not because it's blain was great difference with other materials. Flowability and compressive strength were related with grading distributions of binders because CKD, SP and SF which had small particle size filled up BS and FA. Application of industrial by-products with various grading distributions could be effective for the high early strength and flowability of alkali activated cement free mortar using BS.

• Industrial Engineering and Management Systems
• /
• v.8 no.2
• /
• pp.109-120
• /
• 2009

As the use of 3DCAD data became widespread in designing products in manufacturing, attempts have been made to shorten lead time and reduce cost of production preparation utilizing 3DCAD data for launching assembly lines. In order to create assembly plans not only efficient but easy for operators to operate ('easy-to-operate'), this study presents approaches, methods, and systems for creating 3DCGAs (3 Dimensional Computer Graphic Animations) which automatically utilize a prototype-free production preparation methodology. Characteristics of this study include that it proposes the methodology for creating assembly operation 3DCGAs automatically, for all the possible assembly operations corresponding each of the possible assembly sequences first. Using the created 3DCGAs, the study next considers assembly methods by evaluating how easy or 'operator friendly' they are in implementing, and devises tools or jigs to be used, and plans efficient assembly line organization. The concept of the methodology was formed by focusing on the value-adding assembly steps at which parts turn into products directly. The study also validates the effectiveness of the presented methodology by employing the methods used in actual production preparation process in businesses, and proves that an efficient assembly line can be organized in a shorter period of time utilizing the developed system and by preparing easy-to-operate and efficient plans in 3DCGAs at the design stage.

• Journal of the Korean Society for Precision Engineering
• /
• v.23 no.1 s.178
• /
• pp.159-165
• /
• 2006

Many rubber products are used in industrial products such as various hoses, rubber belts and oil seals etc. Especially, more then 200 rubber parts are used in the automobile, but design technology of these is largely dependent on Held experiences. These methods brought about too much time and cost in the developing procedures. However, with the help of recent rapid development of non-liner computer analysis, we can develop new sound products at low cost. Therefore in this study, optimizations of design variables such as location and number of gate in order to develop CLIP rubber product made of EPDM were performed by CAE in which Cross-WLF equations are adopted. The validity of proposed variables is evaluated by comparison with real forming results.