• Proceedings of the KIEE Conference
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• 2000.07a
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• pp.357-359
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• 2000

This paper is to introduce the R&D project called "Improvement of Automatic Gene-ration Control Related Systems for New Energy Management system". The principal objective of this project is to demonstrate AGC operation capabilities that are suitable to new EMS environment and to show the validity of Set-Point Control Method. A number of developments and enhancements have been made to the generator's Remote Terminal Unit in which new ASTC is being developed and installed. The so-called ACC Signal Transfer Card(ASTC) will include RTU's Set-Point Control capabilities. It is expected that over next few months both RTU & DCS software modifications will be given and a relatively new Set-Point Control Method will be chosen instead of those from more conventional method, pulse control method.

• 한국태양에너지학회:학술대회논문집
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• 2009.04a
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• pp.296-301
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• 2009

The ice storage system uses water for low temperature latent heat storage. However, a refrigerator capacity is increased and COP is decreased due to supercooling of water in the course of phase change from solid to liquid. This study investigates the cooling characteristics of the TMA-water clathrate compound including TMA (Tri-methyl-amine, $(CH_3)_3N)$ of $20{\sim}25wt%$ as a low temperature latent heat storage material. The results showed that the phase change temperature and the specific heat is increased and the supercooling degree is decreased as the weight concentration of TMA increased. Especially, the clathrate compound containing TMA 25wt% has the average phase change temperature of $5.8^{\circ}C$, the supercooling degree of $8.0^{\circ}C$ and the specific heat of 3.499 kJ/kgK in the cooling process. This can lead to reduction of operation time of refrigerator in low temperature latent heat storage system and efficiency improvement of refrigerator COP and overall system. Therefore, energy saving and improvement of utilization efficiency are expected.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• v.38 no.4
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• pp.195-203
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• 2012

Dental implants using titanium have greatly advanced through the improvement of designs and surface treatments. Nonetheless, the anatomical limits and physiological changes of the patient are still regarded as obstacles in increasing the success rate of implants further, even with the enhancement of implant products. So there have been many efforts to overcome these limits. The intrinsic potential for bone regeneration can be stimulated through adjuvant treatments with the continuous improvement of implant properties, and this can play an important role in achieving optimum osseointegration toward peripheral bone tissue and securing ultimate long-term implant stability in standard surgical procedures. For this purpose, various chemical, biological, or biophysical measures were developed such as bone grafts, materials, pharmacological agents, growth factors, and bone formation proteins. The biophysical stimulation of bone union includes non-invasive and safe methods. In the beginning, it was developed as a method to enhance the healing of fractures, but later evolved into Pulsed Electromagnetic Field, Low-Intensity Pulsed Ultrasound, and Low-Level Laser Therapy. Their beneficial effects were confirmed in many studies. This study sought to examine bone-implant union and its latest trend as well as the biophysical stimulation method to enhance the union. In particular, this study suggested the enhancement of the function of cells and tissues under a disadvantageous bone metabolism environment through such adjunctive stimulation. This study is expected to serve as a treatment guideline for implant-bone union under unfavorable circumstances caused by systemic diseases hampering bone metabolism or the host environment.

• Culinary science and hospitality research
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• v.9 no.2
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• pp.64-84
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• 2003

There is this research that supply better experience and satisfaction of most suitable in users standpoint to users through family restaurant website importance and assessment of satisfaction. Also, there is purpose of this research to supply pendulum in family restaurant internet marketing strategy establishment that website can achieve continuous role as marketing means to be not public information that drive revisit and substantial restaurant visit. Family restaurant website estimation received satisfaction assessment which do not get in importance (expected value) in general as analysis result. In other words, domestic family restaurants website are doing construction. operation by marketing means but real users are various interaction part that can collect and achieve about customer opinion except design part that can do to emboss company's image could see side that satisfaction is unenchanted and presented improvement way in website construction. operation on contents part of various and correct information offer and so on that customer infancy strategy part and user of event and coupon event etc. that is distinction robbers need. Also, realization possibility for restaurant prescription that latent customers who use net can raise family restaurant website revisit and substantial sale could see side. Ditto improvement way in that family restaurants construct and operate website conclusively as a marketing tool that public information is not that three offers satisfaction of most suitable to latent customers who use existent net to website as can achieve continuous role contribute.

• KSBB Journal
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• v.26 no.6
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• pp.523-528
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• 2011

The objective of this study was to reduce negative elements such as volatile organic compounds (VOCs) from fulvic acid using supercritical carbon dioxide ($SCO_2$) and to measure concentration and chromaticity of fulvic acid before and after treatment of $SCO_2$. Fulvic acid was treated at different experimental conditions; pressures of 100, 120 and 150 bar at $40^{\circ}C$ for 2 h. The composition of VOCs from fulvic acid was evaluated by GC-MS analysis, and the concentration was quantitatively analyzed using UV-spectrometer from fulvic acid at different experimental conditions. Also, the chromaticity of fulvic acid was evaluated using spectrophotometer. Though concentration and chromaticity of fulvic acid were not nearly changed, the VOCs from fulvic acid was remarkably decreased at 150 bar, $40^{\circ}C$ and 2 h. Reduction of VOCs through the $SCO_2$ is expected to contribute to quality improvement of fulvic acid.

• Korean Journal of Construction Engineering and Management
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• v.6 no.4 s.26
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• pp.122-132
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• 2005

The importance of design value engineering in construction projects recently is rising, which deal about in reduction of cost and improvement of quality. Especially, From half of this year 2005, It is predicted that the value engineering is necessary to be carried out in the projects having project cost more than 10 billion won. In increasing importance of value engineering, we require a way by which we accomplish value engineering systemically and effectively though it is not common in domestic situation. So, this case study shows a way in carrying out value engineering effectively. As the way is to apply QFD(Quality Function Deployment) in pre-study work of design value engineering, this is expected to contribute as function analysis and reflect the requirement of users or owners.

• Proceeding of Spring/Autumn Annual Conference of KHA
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• 2008.11a
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• pp.135-139
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• 2008

Through the industrialization since 1960, Korean housing has been developed in a uniform way which is to demolish first and then construct from the scratch. In this process, detached houses and multi-family living detached houses have disappeared without being paid much attention. The detached houses with blood or non-blood related multi-family living situations are typically popular, and worthy enough to explore for professionals right and creative solutions to enhance their values. But many of the people suffered for the expenses and the absence of the idea to enhance their housing themselves. The purpose of this research is to clarify user's demands of developing an adaptable lifespan house and to try to find the solution about the expenses of self improvement. This study used a Small group workshop Panel Method. The workshop consisted of three stage, such as the awareness of their existing residence and lease status, the needs of the housing improvements and the demands of the adaptable house. This study is expected to serve as a fundamental data to promote discussion on reuse of existing residence building and to promote rental detached houses.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.10 no.5
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• pp.131-136
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• 2011

Many researchers are recently studying about Electroactive polymer(EAP). But it has a physical limitation, because of property of material. Carbon nanotube(CNT) is known as the promising material which has excellent electro-mechanical characteristics and is mostly defect-free. It is expected that a successful synthesis of CNT and Nafion known as a primary material for IPMC would make a great improvement on its electro-mechanic feature. This study focuses on the method of synthesis of CNT with Nafion which improves electro-mechanical characteristic. To come up with mechanical dispersion with Nafion and Isopropyl Alcohol(IPA), we dispersed Single-walled carbon nanotubes(SWCNTs). For a uniformly layer of CNT, we used a spray gun on a hot plate by a simplified method. We fabricated a disperse SWCNT/Nafion composite uniformly. Through the use of the E-beam evaporator to form an uniform electrode layer, we consummated the IPMC actuator. This result shows improving 1.5 times mechanical properties about driving force in IPMC.

• The Korean Journal of Emergency Medical Services
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• v.9 no.2
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• pp.29-38
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• 2005

The purpose of this study was to provide the basic data for improvement of Emergency Medical Service System in Kwangju. The EMSS can be defined as the complete chain of human and physical resources that provides patient care in cases of sudden illness and injury. To provide effective emergency care through the EMSS in a region, the issue of training especially as it relates to EMT in EMSS delivery is more important than emergency medical equipment and facilities for pre-hospital emergency care. The transport of emergency medical patients carried out almost by 119 Emergency Medical Services. But out of all the employees at 119 EMS only 19.0% have graduated with a major in Emergency Medical Technology. It would seem prudent then that the graduates of EMT programs should gradually replace employees working at 119 EMS that do not have an EMT degree to ensure the best possible pre-hospital care for emergency medical patients. Therefore it can be expected that in the future there should an enormous demand for qualified EMT professionals to meet the growing needs for a superior level of emergency medical care for civilian.

• Journal of the Korean Society of Safety
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• v.33 no.1
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• pp.54-61
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• 2018

In this study, we developed a system for information sharing and cooperation support system among the accident response organizations to enable prompt and efficient response in responding to chemical accidents. In other words, by applying mobile messenger function, it is proposed to improve the chemical accident response system that provides information necessary for accident response promptly and accurately, and facilitates bi-directional communication between accident response organizations and field responders, thereby enabling efficient and organic response. As a result of comparing the information provision time before and after the chemical accident of chemical accident response information sharing system, the ratio of processing of substance information and chemical air diffusion information within 30 minutes was improved by 8% and 32%, respectively. As a result of this study, applying the chemical accident response information sharing system to the chemical accident response is expected to contribute to the improvement of the system and the ability to cope with the accident more effectively.