• Journal of the Institute of Electronics and Information Engineers
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• v.53 no.8
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• pp.28-36
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• 2016

ID federation provides users various benefits such as employing multiple services with only single authentication and mitigating management burden of service providers that individually preserve account information of users. To keep up with this international trend, efforts for making the domestic ID federation is ongoing to provide users in the domestic research and education community seamless network connectivity and to support tetherless extension of research environment. In this paper, we analyze the foreign ID federation policies and compare them as a underlying work for making the domestic ID federation. Besides, we suggest some contents that should be included in the domestic ID federation policy. To activate the coming domestic ID federation, we need to first have a well-made federation policy. Then, we need to aggressively promote the domestic ID federation, develop various and fascinating services, and build a convenient support system for technology and service.

• Journal of Digital Convergence
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• v.13 no.10
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• pp.459-470
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• 2015

The study was conducted to find out way that improves service quality for external customers by identifying the impact of Total Quality Management(TQM) on the internal customer satisfaction and then raising the personnel satisfaction measurement in medical institutions. To this end, we carried out a survey of 500 employees from five university hospitals in three metropolitan cities of Busan, Deagu and Ulsan and Gyeongsangnam-do province from February 2 to April 30, 2015, and utilized 476 cases for this study finally. First, in the result of analysis, the leadership of management hierarchy affects education and training and employee participation, but not human resource management nor quality of the work among quality management activities. Secondly, the culture of medical service organization has an effect on every variable of quality management activities. And finally, internal customer satisfaction is influenced by quality management activities, the leadership of management hierarchy and the culture of medical service organization.

• The Journal of the Korea Contents Association
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• v.9 no.12
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• pp.222-234
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• 2009

How to make use of the surplus labor force is the key problem referring to success or failure of new rural building in China. The purpose of the paper is to know exactly that what the problems to the development in the rural area, especially the problem of the rural labor force. The way to solve rural labor force question is to protect the rights of peasants, eliminate the extant city and rural's partitioning pattern and give them the same treatment. Firstly, it should dominate the city and rural economic society's development; Secondly, it should dominate the markets in city and rural, and speed up the fair competition in employment; Thirdly, it should dominate the infrastructural facilities in city and rural; Fourthly, it should dominate the education and social enterprises in city and rural; Fifthly, it should dominate the social security system in city and rural. It should also enlarge the investment of funding, science technology, talented person and management. This is the only way to solve the problem of rural labor force outlet.

• Elastomers and Composites
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• v.43 no.4
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• pp.230-240
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• 2008

In order to synthesize polymer particle containing inorganic material, styrene and nbutylmetacrylate were copolymerized with alumina by dispersion polymerization. The ratio in weight of styrene to n-butyl methacrylate was 3:1. Poly(N-vinyl pyrrolidon) and 2,2'-azobis(isobutyronitrile) were added as stabilizer and as initiator, respectively. The change of particle size was investigated with concentration of initiator, the type of medium, the mixed solubility parameter (${\delta}_{mix}$) of medium, and coupling agent. The enhancement in concentration of initiator resulted in slight increase of particle size. The increase of polarizability in medium also yielded the increase of particle size. In case of changing the ratio of isopropanol to distilled water, we could find relationship of $[{\delta}_{mix}]^{-4.01}\;{\propto}$ particle size and $[{\delta}_{mix}]^{-0.83}\;{\propto}$ particle size distribution(PSD). The type and the concentration of coupling agent showed no effect on the particle size and PSD.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• v.25 no.4
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• pp.295-303
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• 1999

Presented in this paper are the experimental results that measure rapid prototyping (RP) errors in 3D medical models. We identified various factors that can cause dimensional errors when producing RP models, specifically in maxillofacial areas. For the experiment, we used a human dry skull. A number of linear measurements based on landmarks were first obtained on the skull. This was followed by CT scanning, 3D model reconstruction, and RP model fabrication. The landmarks were measured again on both the reconstructed models and the physical RP models, and these were compared with those on dry skull. We focused on major sources of errors, such as CT scanning, conversion from CT data to STL models, and RP model fabrication. The results show that the overall error from skull to RP is $0.64{\times}0.36mm(0.71{\times}0.66%)$ in absolute value. This indicates that the RP technology can be acceptable in the real clinical applications. A clinical case that has applied RP models successfully for treatment planning and surgical rehearsal is presented. Although the use of RP models is rare in the medical area yet, we believe RP is promising in that it has a great potential in developing new tools which can aid diagnosis, treatment planning, surgical rehearsal, education, and so on.

• Journal of the Korean Chemical Society
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• v.44 no.3
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• pp.177-183
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• 2000

The interaction of phenoxide anion with .the mixed micelles of CTAB(Cetyl-trimethylammonium bromide) and TTAB(Tetradecyltrimethylammonium bromide) was studied by UV/Vis spectrophotometric method. The solubilization constants($K_s$) of phenoxide anion into the mixed micellar phase and the critical micellar concentrations(CMC) of those mixed surfactant systems have been measured and analyzed with the change of overall mole fraction of CTAB($\alpha_{CTAB}$) The effects of additives(n-pentanol and NaBr) on the solubilization of phenoxide anion by those mixed surfactant systems have been also measured. There was a great decrease on the values of solubilization constant and CMC with these additives. For the thermodynamic study, the dependence of $K_s$ values on temperature has been measured and various thermodynamic parameters(${\Delta}G^0_s$, ${\Delta}H^0_s$ and ${\Delta}S^0_s$) have been also calculated. The results show that all the values of ${\Delta}G^0_s$ and ${\Delta}H^0_s$ are negative within the measured temperature region but the values of ${\Delta}S^0_s$ are positive.

• Horticultural Science & Technology
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• v.34 no.4
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• pp.634-643
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• 2016

In this study, we compare the quality of the mango cv. Irwin cultivated in Jeju and Okinawa by evaluating the total soluble solids (TSS) and antioxidant activity (AA) from ethanol extracts of the fruit. TSS and AA were higher in fruit cultivated at the Research Institute of Climate Change and Agriculture in Jeju (RICA) and Okinawa farm, where the low tree height cultivation method is used, than in fruit cultivated on farm in Jeju. Also, the mangiferin content of the Okinawa farm was higher than those produced on the RICA and Jeju farm house. These results suggest that the lowering tree height cultivation method improves the quality of the mango cv. Irwin.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.26 no.3
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• pp.576-585
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• 2002

A three-dimensional Lagrangian explicit time-integration finite element code for analyzing the dynamic impact phenomena was developed. It uses four node tetrahedral elements. In order to consider the effects of strain rate hardening, strain hardening and thermal softening, which are frequently observed in high-velocity deformation phenomena, Johnson-Cook model is used as constitutive model. For more accurate and robust contact force computation, the defense node contact algorithm was adopted and implemented. In order to evaluate the performance of the newly developed three-dimensional hydrocode NET3D, numerical simulations of the oblique impact of mild steel plate by mild steel sphere were carried out. Ballistic limit about various oblique angle between 0 degree and 80 degree was estimated through a series of simulations with different initial velocities of sphere. Element eroding by equivalent plastic strain was applied to mild steel spheres and targets. Ballistic limits and fracture characteristics obtained from simulation were compared with experimental results conducted by Finnegan et al. From numerical studies, the following conclusions were reached. (1) Simulations could successfully reproduce the key features observed in experiment such as tensile failure termed "disking"at normal impacts and outwards bending of partially formed plus segments termed "hinge-mode"at oblique impacts. (2) Simulation results fur 60 degrees oblique impact at 0.70 km/s and 0.91 km/s were compared with experimental results and Eulerian hydrocode CTH simulation results. The Lagrangian code NET3D is superior to Eulerian code CTH in the computational accuracy. Agreement with the experimentally obtained final deformed cross-sections of the projectile is excellent. (3) Agreement with the experimental ballistic limit data, particularly at the high-obliquity impacts, is reasonably good. (4) The simulation result is not very sensitive to eroding condition but slightly influenced by friction coefficient.

• Analytical Science and Technology
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• v.11 no.2
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• pp.92-95
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• 1998

K-SGICs(synthetic graphite intercalation compounds) were synthesized in a modified two-bulb pyrex tube. The pressure in the two-bulb tube was maintained at approximately $10^{-3}$ torr for the reaction of potassium and graphite. Deintercalation process of the K-SGlCs obtained by the modified method was heat-treated by keeping in liquid paraffin between $25^{\circ}C$ and $1400^{\circ}C$. The thermal stability and the temperature dependence of the K-SGICs were characterized using differential scanning calorimeter(DSC) analyzer. Enthalpy and entropy for K-SGIC formations were calculated by confirming the deintercalation and thermodynamic exothermic reactions depending on the various temperatures. The structure changes and thermal stability of K-SGICs during the deintercalation reaction of potassium ions and the interlayer spaces of the synthetic graphite were identified by X-ray diffraction(XRD).

• Journal of the Korean Home Economics Association
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• v.47 no.9
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• pp.15-26
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• 2009

The main purpose of this study was to speculate how psychological state of adolescent students has changed their school uniform style. For the study, the distinctive characteristics during adolescence stage were theoretically examined. Through the examination, this study found four interests in fashions and school uniforms. For the purpose, this study conducted interviews with grade 2 students in a total of six coeducation secondary schools in Seoul, Gyeongki and Gwangju using a questionnaire. The survey period ranged from December 15 2008 to December 24 2008 and a total of 1196 were used for a final analysis. This study extracted factors as Principal Components Analysis and used Varimax for orthogonal rotation analysis. To measure confidence, it used Cronbach's a test to item internal consistency. For data analysis, it used SPSS WIN 12.0 and for hypothesis analysis, frequency analysis, cross analysis, independent t-test, and one-way ANOVA were conducted. For posterior analysis, it used Sheffe test. The results are as follows: First, the interests in fashion and school uniforms differed depending on their own tastes, but these interests were more influenced by environment around school. Secondly, the boy subjects were more aggressive towards repairs their uniforms than the girls, which suggested that boys had stronger desire to show themselves to others and more satisfaction from repairs their uniforms than the girls. Based on the results, this study concluded as follows: We should pay attention to preventing deformation in original design of school uniforms while expanding options to have variable designs or to change detailed part of design. So, there will be no additional uniform mending expense and financial loss to parents, and students will be more satisfied with their school uniforms.