• Journal of radiological science and technology
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• v.40 no.3
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• pp.501-508
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• 2017

The purpose of present research is to offer a specialized educational opportunity for potential users, university students in radiology, by developing specific curriculum on site at KAERI, using HANARO research reactor and National radiation research facilities. The specific items of this research accomplished are: First, Development and operation of various curricula for specific research using HANARO and National radiation research facilities to provide university students with opportunities to use the facilities. Second, Operation of the experiment training programs for university students in radiology to foster next generation specialists. Third, through the on-site experiment training for students in radiology, support future potential experts of the radiation research fields, and broaden the base. A textbook and a teaching aid, a questionnaire have been developed to support the program. 714 university students have completed the courses for radiology experiment from 2006 to 2017. It is hoped that these experiments broaden public awareness and acceptance by the present and potential future utilization of the research reactor and national radiation research facilities, thereby bring positive impacts to policy making.

• Asian Pacific Journal of Cancer Prevention
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• v.14 no.10
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• pp.5599-5608
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• 2013

With the high morbidity and mortality caused by cancer, finding new and more effective anti-cancer drugs is very urgent. In current research, biotransformation plays a vital role in the research and development of cancer drugs and has obtained some achievements. In this review, we have summarized four applications as follows: to exploit novel anti-cancer drugs, to improve existing anti-cancer drugs, to broaden limited anti-cancer drug resources and to investigate correlative mechanisms. Three different groups of important anti-cancer compounds were assessed to clarify the current practical applications of biotransformation in the development of anti-cancer drugs.

• Journal of the Korean Society for Precision Engineering
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• v.33 no.3
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• pp.225-230
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• 2016

Since the development of anodic aluminum oxide (AAO), extensive studies have been conducted ranging from fundamental research to the applications of AAO. Most of the research on AAO structures have focused on well-aligned nanoporous structures fabricated under specific conditions. This study investigated fabricable AAO structures with anodization performed with various temperatures, electrical potentials, and basal plane surfaces. As a result, nanoporous and nanofibrous structures were fabricated. The nanopores were formed at a relatively lower temperature and potential, and the nanofibers were formed at a relatively higher temperature and potential regardless of the basal plane surface. The shape of the base surface was found to influence the structural arrangement in nanoporous morphologies. These interesting findings relating to new morphologies have the potential to broaden the possible applications of AAO materials.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.34 no.12
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• pp.75-81
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• 2006

In this paper, the 6-dof electric motion platform system designed for the helicopter simulator satisfying the class of the CASA(Civil Aviation Safety Authority) level 2 is presented. From the kinematic, dynamic and structural analyses for motion base and electrical actuator systems, we show the feasibility of the developed motion platform system by producing the acceptable results of the test and evaluation according to the requirements specified in the CASA level 2. Furthermore through this development we suggest newly the adaptability of the electrical actuator system up to 10 ton class motion platform system, whose usage will be broaden rapidly, substituting with the advantage over the conventional hydraulic system.

• Journal of Fisheries and Marine Sciences Education
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• v.25 no.1
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• pp.128-138
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• 2013

The purpose of the research is to provide the basic information to broaden a population in marine sports and mark the beginning of the era of the marine sports with a yacht, water ski and a various of marine sports activities by researching the effect of sailing school participants' motive and satisfaction on continuous participation, preparing for the era of a 30,000~40,000 dollars per capita GDP in the near future. To achieve this purpose, through the research from December 2009 to April 2012, the following is concluded. First, in regard to psychological satisfaction and facility satisfaction, all subordinated factors of participating motive affect, health-oriented and social relations in the aspect of social satisfaction, and health-oriented, home entertainment and social relations in the aspect of self satisfaction. Second, sports capability affects health-oriented and pastime entertainment, sports habit and peer affect health-oriented, and sports environment affects home entertainment. Third, sports capability affects psychological satisfaction, sports habit affects psychological satisfaction and facility satisfaction, sports environment affects social satisfaction.

• Journal of the Korean Ceramic Society
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• v.29 no.12
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• pp.935-941
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• 1992

The LAS system with good thermal properties has a narrow range of firing and sintering temperature near the melting point. So it is difficult to sinter LAS to dense sintered body. In this study, the petalite (Li2O.Al2O3.8SiO2) with good thermal properties, was taken as a base composition, and zironia was added in this composition to broaden the firing range, increase the mechanical strength, and control the thermal expansion. The thermal and mechanical properties were investigated. The results are as follows; 1. Zirconia phase was formed in LAS matrix and apparent porosity was decreased from 0.9% to 0.5%, and the mechanical strength was kincreased from 112 MPa to 190 MPa, by the densification of body. 2. The composition Li2O.Al2O3.8SiO2 has a negative thermal expansion, but the thermal expansion was changed from negative to positive with the densification and the increase of amount of synthesized zircon phase which had positive thermal expansion. The coefficient of thermal expansion, with the increase of the amount of additives, was low as -0.74~9.06$\times$10-7/$^{\circ}C$ in 20~$600^{\circ}C$, and 7.95~20.13$\times$10-7/$^{\circ}C$ in 20~80$0^{\circ}C$. 3. The mechanical strength of LZ15 (added with ZrO2.SiO2 15 wt%) composition thermal-shocked was stable in the temperature range of 0~$600^{\circ}C$, but rapidly decreased due to the increase of thermal expansion above $600^{\circ}C$.

• Korea Trade Review
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• v.42 no.5
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• pp.233-252
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• 2017

The fast changes of global financial environment in recent years increase the risk of trade settlement. This means are required to minimize risk of non payment and to maximize secure payment. Open Account trade accounts for 90% of global trade flows. The O/A system means that the goods, along with all the necessary documents, are shipped and delivered before payment is due, usually within a time frame from 30 to 90 days. Meanwhile, Korean small and medium-sized export enterprises are compelled to globalize their activities owing to limitation and competitiveness of domestic marketplace. To keep face with the global trade settlement system and to support globalization of small and medium-sized export firms, the BPO together with Supply Chain Finance will be solutions. The introduction of the BPO system will allow banks to broaden O/A offerings to their client base and due to secure safety, sellers could ship the goods without delay according to orders and buyers could settle promptly by payment undertaking of correspondent banks. Therefore, it is more effective for companies which have sustainable customers and stable transaction. This study take a look at the trend of the global payment systems and suggested limitation of existed payment in order to derive improvement measures of electronic payment for small and medium-sized export enterprises.

• The Journal of Korean Academy of Prosthodontics
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• v.49 no.4
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• pp.341-345
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• 2011

Genetic association study has been progressed in medicine along with advance in genetic technology. It focused on the individual differences in genotype due to errors occurring during DNA duplication, which can cause vulnerability to specific diseases. Polymorphism defines the varieties in phenotype due to those genetic variations. Polymorphism due to change in one DNA base sequence is called as a Single Nucleotide Polymorphism. In the near future, the evaluation of relative risk to specific disease according to SNP will be essential part of fundamental of medicine for the diagnosis, treatment and prevention. Dental caries and periodontal diseases has been first subject to genetic association study in dentistry and broaden out to other areas like bone formation and resorption. This article presents the current state of genetic association study and its application to dentistry.

• Journal of Pharmacopuncture
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• v.7 no.2
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• pp.109-119
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• 2004

Objective : To broaden our understanding on occupational disease of market workers and to evaluate the effect of TKM treatment focusing on acupuncture and herb medicine and to promote base studies and clinical trials on occupational disease. Materials and Methods : Analysis was done on 33 Ga-Rak market workers' chart which had been selected through investigation of 1508 outpatient's chart of Kyung Won University Hospital from Jun. 1st, 2002 to May. 31th, 2003. Results : 1. Out of 33 patients, Men had more occupational diseases than women had and Most people were in their forties. 2. Major cause of the disease include repetitve bending, heavy weight lifting and overwork. 3. Past History of patients mostly include frequent lumbar sprain, periarthritis of shoulder, lumbar HNP 4. The patients with occupational disease were diagnosed as lumbar sprain, periarthritis of shoulder, lumbar HNP, degenerative spondylosis, spinal stenosis and their chief complaints were low back pain, omalgia, back pain with radicular pain. 5. The duration of treatment was mostly within a week. 6. Acupuncture, Bee Venom Acupuncture, moxibustion, Herb-medicine, extract, taping therapy, physical therapy were used as treatment methods. 7. Applied herb medicine were composed of 8 kinds of prescriptions and extract were made up of 6 prescriptions 8. Applied acupoints belonged mainly to 14 meridians 9. The treatment of herb medicine combined with acupuncture proved effective in treating the ocupational disease. Conclusion : The occupational disease of patients working in Ga-Rak market were closely related with overwork, especially with repetitive bending and heavy weight lifting and TKM treatment focusing on acupuncture combined with herb medicine was effective in treating occupational disease.

• Journal of the Institute of Electronics and Information Engineers
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• v.51 no.6
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• pp.78-86
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• 2014

In this paper, a novel intensity-based fiber optic vibration sensor using a mass-spring structure, which consists of four serpentine flexure springs and a rectangular aperture within a proof mass, is proposed and its feasibility test is given by the simulation and experiment. An optical collimator is used to broaden the beam which is modulated by the displacement of the rectangular aperture within the proof mass. The proposed fiber optic vibration sensor has been analyzed and designed in terms of the optical and mechanical parts. A mechanical structure has been designed using theoretical analysis, mathematical modeling, and 3D FEM (Finite Element Method) simulation. The relative aperture displacement according to the base vibration is given using FEM simulation, while the output beam power according to the relative displacement is measured by experiment. The simulated sensor sensitivity of $15.731{\mu}W/G$ and detection range of ${\pm}6.087G$ are given. By using reference signal, the output signal with 0.75% relative error shows a good stability. The proposed vibration sensor structure has the advantages of a simple structure, low cost, and multi-point sensing characteristic. It also has the potential to be made by MEMS (Micro-Electro-Mechanical System) technology.