• Steel and Composite Structures
• /
• v.22 no.2
• /
• pp.449-472
• /
• 2016

This paper studies the seismic behavior of reinforced concrete (RC) walls with encased cold-formed and thin-walled (CFTW) steel truss, which can be used as an alternative to the conventional RC walls or steel reinforced concrete (SRC) composite walls for high-rise buildings in high seismic regions. Seven one-fourth scaled RC wall specimens with encased CFTW steel truss were designed, manufactured and tested to failure under reversed cyclic lateral load and constant axial load. The test parameters were the axial load ratio, configuration and volumetric steel ratio of encased web brace. The behaviors of the test specimens, including damage formation, failure mode, hysteretic curves, stiffness degradation, ductility and energy dissipation, were examined. Test results indicate that the encased web braces can effectively improve the ductility and energy dissipation capacity of RC walls. The steel angles are more suitable to be used as the web brace than the latticed batten plates in enhancing the ductility and energy dissipation. Higher axial load ratio is beneficial to lateral load capacity, but can result in reduced ductility and energy dissipation capacity. A volumetric ratio about 0.25% of encased web brace is believed cost-effective in ensuring satisfactory seismic performance of RC walls. The axial load ratio should not exceed the maximum level, about 0.20 for the nominal value or about 0.50 for the design value. Numerical analyses were performed to predict the backbone curves of the specimens and calculation formula from the Chinese Code for Design of Composite Structures was used to predict the maximum lateral load capacity. The comparison shows good agreement between the test and predicted results.

• The Journal of the Korea Contents Association
• /
• v.6 no.10
• /
• pp.163-173
• /
• 2006

It is frequent to develop the fashion product through predict purchasing needs of consumers in Textile and Fashion Industry. If failed in its prediction, that is, if consumers would not purchase the product, there comes some problems that big sale is inevitable or stock increase tremendously. Otherwise, Quick Response System allows that the company observe the consumer's needs consistently and design products and establish manufacture schedule rapidly so that they could prohibit the products unnecessarily stocked. Consumer's preference is collected and analyzed through the data generated by POS system, and this is provided to the related manufacturer through network in realtime, so that the manufactures could merchandise, produce and provide the products according to the consumer's need. Thus, this study developed POS system-education program, that is, the merchandising of apparel product, product by prediction, retailer, purchase behavior, reduction in stock inventory and product lead time, cooperative system between apparel company and retailer, and conformation to the consumer's needs are included in this program, through binding the new technology in textile and fashion industry for the purpose of Quick Response system.

• Korean Journal of Fisheries and Aquatic Sciences
• /
• v.19 no.5
• /
• pp.477-484
• /
• 1986

The interaction of myofibrillar protein with lipid or oxidized lipid was considered to be mostly contributing to the drop of digestibility of fish meat products. The digestibility of myofibrillar protein was $92.11\%$ for flounder and $88.04\%$ for hairtail fish, repectively, and as a rule it decreased as both the amount of lipid and reaction time increased. It also decreased with increase in the amount of added linoleate and oxidized linoleate. However, when the reaction continued for 6 hours or more the digestibility rather increased, which was provably due to the unfolding of protein structure. The hot air dried hairtail fish showed the lowest C-PER values among all dried fish products. The protein quality of flounder, hairtail fish and their dried ones except hot air dried ones measured by C-PER procedure were superior to that of ANRC casein. DC-PER values of all samples were greater than those of C-PER values and the greater discrepancies were noted in hairtail fish (fatty fish) products which possessed the lower in vitro protein digestibilities. Predicted diegstibilities, which were calculated using amino acid profiles, of all samples except raw ones were overestimated in comparison with in vitro protein digestibilities. From the observations so far, formation of complex of lipids and protein was thought to be the most important factor in lowering protein digestibility of the dried fish meat products.

• Elastomers and Composites
• /
• v.42 no.2
• /
• pp.86-92
• /
• 2007

A few of polytetrafluoroethylene(PTFE) membranes and PTFE fine powders were analyzed to chooce an optimum resin. The bi-axial stretching process was developed to set up the foundation of the preparation process and control the pore size and porosity of PTFE membrane. The pretreatment of PTFE fine powder used in the preparation process for PTFE was needed. The mixing of additives, the ripening of mixture, paste extrusion process of ripening powder, calendering process and the bi-axial process were conducted for controlling pore size, porosity and thckness of membrane. The aftertreatment which strengthened the mechanical properties was necessary. The control of pore size and porosity of the membrane were determined. The ratio of PTFE fine powder and additives at the paste extrusion process, the ripening time, the ripening temperature and the parameters of temperature and pressure at the paste extrusion process were optimized.

• 보존과학연구
• /
• s.34
• /
• pp.32-48
• /
• 2013

This study examined the applicability of deterioration monitoring techniques to establish efficient conservation and management system for stone cultural heritage which conservation treatment has been done. It was confirmed that deterioration mapping combined with photography and grid work, and adhesive tape test for the surface were very applicable to investigate the surface change due to deterioration, and assess the degree of granular disintegration quantitatively. The portable microscopic survey and ultrasonic measurement were efficient techniques to observe mineral looseness and microcrack, and to track the strength change of the stone before-and-after the conservation treatment. These techniques can be easily used by manage practitioners in the field through simple guidance and technical education. Also, it can contribute to build a long-term and methodical conservation and management system of the stone cultural heritage.

• Journal of the Korean Geographical Society
• /
• v.50 no.5
• /
• pp.557-569
• /
• 2015

This study aims to illustrate the national images of United Kingdom, France, and Germany based on the descriptions in the Korean middle school Social Studies textbooks in comparative perspective. In order to identify and compare the national images of the three countries, the author uses a framework for analysis consisting cognitive, normative, and relational factors. The main findings are as follows. First, the most frequently shown topics and issues are democratic institutions in the case of United Kingdom, respect for human rights in the case of France, and sustainable environment in the case of Germany. Second, for all the three countries, the most frequent factor among the three is cognitive one, followed by normative and then relational factors. Third, United Kingdom is described as a country of social unrest and conflict as well as a democratic country with long history and tradition. Fourth, France is described as a country of respect/abuse of human rights, potential for high tech industry, and largest agricultural state in Europe. Fifth, Germany is described more as a country of a leading country for global environmental protection than as a country with electronic and information technology.

• Korean Journal of Occupational Health Nursing
• /
• v.11 no.1
• /
• pp.5-12
• /
• 2002

The purpose of this study, as a project for health management at small workplace by Korean association of occupational health nurse, was to evaluate the program for correction of eating habits to prevent digestive disorders of workers. The study cases were twenty nine workers who voluntarily participated in the above program and they were from small(under fifty employees) workplace at Youngdeungpo-gu, Seoul. The study was done between January, 2000 and May, 2000. This program was concerned with daily menu for correction of eating habits and was composed of individual health education and distributing guide books and video. Nurses visited the workplace for the program once a week or two weeks. The result of this program was evaluated by paired t-test of digestive symptoms, eating habits, and self-efficacy before and after the fulfillment of the program. The result could be summarized as below. 1) There were decrease in digestive symptoms and improvement in eating habits and self-efficacy from study cases after fulfillment of the program. 2) The most common digestive symptoms were heartburn, upper abdominal pain, indigestion. The symptom which had been improved through the program were indigestion, heartburn and anorexia in the order. 3) The most improved eating habit was to eat flat foods instead of salty and spicy foods. The most improved self-efficacy was 'I can follow any helpful guides for my health'. The result indicated the program was successful for workers at small workplace. The continual management by nurses' regular visit once a week or two weeks was the most important thing for the successful program.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2015.05a
• /
• pp.120-122
• /
• 2015

In this paper, we proposed an algorithm of the unnecessary copied message inhibition using dynamic density what is called DDIM(Dynamic Density-based Inhibited Message diffusion) in DTNs(Delay Tolerant Networks). Existing DTN routing algorithms as Epidemic and Spray and Wait have some problems that occur large overhead in dense network due to the thoughtless message diffusion. Our proposed method, the DDIM, determines adjusted number of copied message through dynamic node density that is calculated using node's radio coverage and neighbor nodes in period time to solve message diffusion problem. It decrease overhead without losing message delivery ratio and increased latency through reducing message diffusion. In this paper, we compare delivery ratio, average latency and overhead of proposed algorithm, DDIM, and existing DTN routing algorithm and prove enhanced performance through simulation results.

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
• /
• v.24 no.1
• /
• pp.52-56
• /
• 2011

The ongoing Superconducting Fault Current Limiter(SFCL) development mainly has focused on the application of commercializaton and power system through combining with normal-conducting device, moving away from current-limiting method, which is solely dependant on the existing superconductor. Compared to the structural development above, on the other hand, the research on applying superconducting current-limiting element to SFCL, the heart of SFCL, still has a lot left to do, apart form traditional resistive type SFCL. In this study, we looked into the current limiting characteristic of SFCL using core and coil. YBCO coated conductor with stainless steel stabilizer layer was verified by the excellent of current-limiting element of the resistive type SFCL that has a high Jc and index as well as being superior in mechanical property. Also, we study temperature characteristics and resistance characteristics, max voltage, response time and current-limiting ability that can be an indicator as current-limiting element while applying to superconducting current-limiting element caused by variation of winding direction, winding ratio of SFCL using core and coil.

• Journal of the Korea Furniture Society
• /
• v.24 no.4
• /
• pp.433-443
• /
• 2013

The furniture industry of the northern region of Gyeonggi Province consists of several regional complexes which was just autogenously, that is, not based on the organized and planned movements cultivated and clustered, so it stays small businesses. This fact certainly requires to find right courses for future policy direction, in order to develop the furniture industry centering in the northern region of Gyeonggi Province internationally competitive. Consequently the aim of the present study was to investigate the characteristics of the furniture industry in the northern region of Gyeonggi Province first and to present right development directions for the innovation of the structure of furniture industry according to the change of the times, i.e. to connect the industry, university and the authorities concerned well and to strengthen the technology level of furniture industry accordingly. In addition, this requires education and training of the excellent designers being able to create high added-value industrial sectors, including finding a new Korean national brand which should preoccupy the global market. Furthermore, the high-tech furniture industrial complex specialized in manufacture, distribution and marketing such as the division of work between business to business should be built and finally a Korean traditional & unique furniture culture should be created on the basis of a cultural approach of furniture industry. It would be the timing for entire business sectors related to Korea's furniture industry to establish an international standard certification like ISO, in order to upgrade the quality of furniture steadily while keeping our own tradition, and this belongs to a meaningful attempt for the high-tech lifestyles and the improvement in the quality of life of customers.