• Journal of Korean Physical Therapy Science
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• v.18 no.2
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• pp.73-80
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• 2011

Purpose: The purpose of this study was to investigate the correlation between the visual perception ability and the static dynamic balance ability in health elderly. Method: The Motor Free Visual Perception Test-Row Score(MVPT-RS) and MVPT-Process Time(MVPT-PT) were used for evaluating the visual perception abilities. Assessment of the balance ability was taken by using Good Balance System. In the assessment using Good Balance System, X, Y coordinate speed, anterior-posterior direction, medial-lateral direction and Velocity Movement(VM) in standing posture when eye open were measured as static balance abilities. Thirty-seven healthy elderly who live in Gwangyang participated in the experiment for 2 months, from October to November 2010. Results: 1. There were statistically significant differences of MVPT-RS, MVPT-PT, NSB-X, NSB-Y, NSB-VM, OLB-X, and OLB-VM based on the gender(p<0.05). 2. The negative correlations of MVPT-RS:NSB-Y(r=-0.354), MVPT-RS:OLB-X(r=-0.4), MVPT-RS: OLB-Y(r=-0.371), but positive correlations of MVPT-PT:DTB-T showed a statistical significance(r=0.45, p<0.05). 3. The positive correlations of NSB-X:NSB-Y(r=0.54), NSB-X: NSB-VM(r=0.848), NSB-Y:NSB-VM(r=0.531), OLB-X:OLB-Y(r=0.876), OLB-X:OLB-VM(r=0.872), and OLB-Y:OLB-VM(r=0.787) showed statistical significances(p<0.05). Conclusion: These results showed that the visual perception ability was correlated with some balance ability in health elderly. Especially the perception test process time(MVPT-PT) has closely related with the DTB-T. The visual perception ability is considered as a factor on the balance ability in health elderly. Further study will focus on the development of improving program of visual perception ability as an improving method of balancing ability in health elderly.

• Journal of the Korean Vacuum Society
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• v.16 no.3
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• pp.221-226
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• 2007

DBR (distributed Bragg reflectors) PSi (porous silicon) composite films displaying dual optical properties, both optical reflectivity and photoluminescence had been developed. DBR PSi samples were prepared by electrochemical etch of heavily doped $p^{++}-type$ silicon wafers (boron doped, polished on the <100> face, resistivity of $0.8-1.2m{\Omega}-cm$, Siltronix, Inc.). Free-standing DBR PSi films were treated with PMMA (polymethyl methacrylate) to produce flexible, stable composite materials in which the PSi matrix is covered with PMMA containing photoluminescent polysiloles. Optical characteristics of DBR PSi/polysilole-impregnated PMMA composite materials exhibit both their photonic reflectivity at 565 nm and photoluminescence at 510 nm, simultaneously. A possible application of this materials will be discussed.

• Quality Improvement in Health Care
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• v.8 no.2
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• pp.160-171
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• 2001

Background : This study was conducted to compare the level of satisfaction between mothers who were educated on the care of newborns by video-taped method and those by verbal one before discharge. Methods : Fifty-two mother (verbal method group) from a free standing OB & GY hospital in Wonju City and forty-seven mothers (videotaped method group) from the OB & GY section of Wonju Christian Hospital(WCH) were selected for a study sample. The knowledge and understanding of newborn care and the degree of maternal satisfaction were assessed after the education by self-administered questionnaires. The opinions of the 11 nurses of WCH who were involved in the education were also collected by a questionnaire. Results : With respect of the level of understanding and satisfaction with the discharge education on newborn care, there is no significant difference between the videotaped educated group and verbal educated one. The correlation analysis of the video education group revealed a strong correlation between the score of understanding and satisfaction with the discharge preparation(r=0.409, p=0.01), and between the satisfaction scores for discharge preparation and discharge education(r=0.844, p=0.001). As for the verbal education group, the score of understanding also correlated significantly with both the score of satisfaction with the discharge education(r=0.272, p=0.001) and the discharge preparation(r=.680, p=0.001). Conclusions : This study showed that the discharge education to mothers regarding newborn care by a videotaped method does not improve the understanding or satisfaction of the mothers. However, the response to the mode of discharge education varies by the characteristics of the mothers. In conclusion, the characteristics of the mother should be considered in order to improve the understanding and knowledge of newborn care when the mode discharge education is chosen.

• Korean Journal of Food Science and Technology
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• v.36 no.1
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• pp.69-74
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• 2004

'Mixing' and 'immersion' $CaCl_{2}$ treatment methods were tested for preparation of bio-degradable films using powders of sea mustard (Undaria pinnatifida) (leaf, stem, and sphorophyll), sweet tanlge (Laminaria japonica), and fusiforme (Hizikia fusiforme) by extracting alginate through acid-alkali extraction method. Except fusiforme powder, flexible, free-standing films were produced by both methods using all marine algae powders tested. Except water solubility (WS), surface color, tensile strength (TS), elongation at break (E), and water vapor permeability (WVP) did not show distinct difference between $CaCl_{2}$, treatment methods. Although TS, WVP, and WS of marine algae powder films were lower than those of alginate films, they indicate potential in application as a new source of bio-degradable packaging materials.

• 제어로봇시스템학회:학술대회논문집
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• 2005.06a
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• pp.751-755
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• 2005

We propose a sound source localization method using the Head-Related-Transfer-Function (HRTF) to be implemented in a robot platform. In conventional localization methods, the location of a sound source is estimated from the time delays of wave fronts arriving in each microphone standing in an array formation in free-field. In case of a human head this corresponds to Interaural-Time-Delay (ITD) which is simply the time delay of incoming sound waves between the two ears. Although ITD is an excellent sound cue in stimulating a lateral perception on the horizontal plane, confusion is often raised when tracking the sound location from ITD alone because each sound source and its mirror image about the interaural axis share the same ITD. On the other hand, HRTFs associated with a dummy head microphone system or a robot platform with several microphones contain not only the information regarding proper time delays but also phase and magnitude distortions due to diffraction and scattering by the shading object such as the head and body of the platform. As a result, a set of HRTFs for any given platform provides a substantial amount of information as to the whereabouts of the source once proper analysis can be performed. In this study, we introduce new phase and magnitude criteria to be satisfied by a set of output signals from the microphones in order to find the sound source location in accordance with the HRTF database empirically obtained in an anechoic chamber with the given platform. The suggested method is verified through an experiment in a household environment and compared against the conventional method in performance.

• International Commerce and Information Review
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• v.12 no.3
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• pp.167-195
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• 2010

The global financial crisis, the instability of the global economy since the beginning of the growing economic interests of the countries to adjust to establish a new economic system was set up on occasion. Meanwhile, standing in the international trade environment, multilateral system of international trade for the country as the cumulative fatigue of open markets and trade liberalization as an alternative to lead the free trade agreements between countries. Currently in Korea and China, in addition to the geographical proximity in all areas, including economic exchanges and mutually dependent relationship that is deepening the world's No. 1 exporter in China and overseas investors have become partners. FTA with China by promoting the growth of emerging economies in the Chinese market by securing a stable economic growth of China as a driver of economic growth in the country to utilize the plan is being promoted from. This study is currently being promoted, in a discussion of the FTA's agricultural trade measures to address the challenges and poems. Agricultural trade with other goods to be different from the specificity of the discussion of market opening and liberalization of trade has been recognized in the main essentially nothing. We promote an FTA, according to one review and discuss the background and trends of the agricultural trade in a market, through the analysis of the status and trends and present problems for future bilateral trade negotiations with Korea for agricultural markets and propose countermeasures for. Agricultural trade, during a discussion of the FTA is essentially nothing in the review is expected to expand the bilateral trade in agricultural products, while protecting its agricultural markets to be trying to policy implications.

• Journal of the Korea Fashion and Costume Design Association
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• v.11 no.3
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• pp.27-41
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• 2009

As for modern people, the fashion accessory plays a role in allowing the whole coordination in clothing to be highlighted, receives environmental factors in the complementary relationship with clothing, and is being progressed rapidly as well. Among accessories, it is considered to be probably significant to examine especially about the historical consideration and the transitional process in bag, which becomes a means of expressing free individuality in fashion while recognizing importance of bag, which is being developed today as a necessary article along with diverse lifestyles in each individual. Accordingly, the purpose of this study was to examine which correlation a bag comes to have with clothing according to a historical change in fashion and was changed in the transitional process of historical consideration on bag from the latter half of the medieval times to the modern times. Also, it tries to analyze on features in a form, material, kind, and color by period in a bag. Thus, the aim is to be conducive to a future qualitative research on bag Through the research process, it could be known about which a bag has been changed into diverse forms while experiencing several processes in order to conform with a flow of clothing, which is required by society according to a change in period, and about its historical significance, value, and aesthetic characteristics. It was certainly necessary for walking about with putting commodity necessary for people in it. As one of accessories that cannot be separated from clothing, it makes it available for knowing user's social standing and position and living scale, and makes it realized for the importance influence upon establishing a woman's identity.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.32 no.2C
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• pp.79-84
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• 2012

A technique for analyzing laterally loaded piles was developed in order to accommodate various loading conditions and unique p-y curves obtained from local site. Developed technique was applied to several problems associated with laterally loaded piles to confirm the reliability of the developed technique. And the influences of the parameters considered in the applications on analysis results were investigated. It can be seen that length of the increment of one half of pile diameter is optimum for accuracy of analysis. Problems associated with safe penetration of pile and buckling of a free standing pile were analyzed by the developed technique. Also, analysis results obtained from considering various pile head conditions of a pile which supports retaining wall were compared. The developed technique can be used as a more flexible tool for analyzing laterally loaded piles than commercial program.

• The Journal of the Korea Contents Association
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• v.12 no.12
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• pp.135-145
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• 2012

This study is a research development case study on the free-standing Network based camera video recording DVR. The DVR devices till now have recorded data by converting and compressing analogue video to digital, but in the future, digital videos will be recorded directly through the network camera. Also, digital compressing methods are progressing from MPEG-4, MJPEG, to H.264 method, with products considering high definition compression efficiency, minimized data size, network compatibility, and fast pending time. According to this, in 2012, it is predicted that network camera and video devices throughout the world will outrun the current analogue devices. With this transition of technological environment and fast product pending speed, a new, quality focused design is required for product development including technical realization, reliability, high-definition, compression technology, will be essential. Manufacturers are researching a new direction for the product appearance. This study considers the actual end-users as the design target and through consumer survey on preferences, design needs and required elements necessary in the design development process are extracted. Furthermore, usability and preferred images were explored through literature study and market research. Through this research process, appropriate forms for the network based DVR were analyzed, and applied into the design development process. This product will take into consideration its competitiveness and the significance of USP(Unique Selling Proposition) which is the design supremacy and professional technical skills.

• Advances in materials Research
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• v.1 no.4
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• pp.311-347
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• 2012

Infections are caused due to the infiltration of tissue or organ space by infectious bacterial agents, among which Staphylococcus aureus bacteria are clinically most relevant. While current treatment modalities are in general quite effective, several bacterial strains exhibit high resistance to them, leading to complications and additional surgeries, thereby increasing the patient morbidity rates. Titanium dioxide is a celebrated photoactive material and has been utilized extensively in antibacterial functions, making it a leading infection mitigating agent. In view of the property amelioration in materials via nanofication, free-standing titania nanofibers (pure and nominally doped) and nanocoatings (on Ti and Ti6Al4V implants) were fabricated and evaluated to assess their efficacy to mitigate the viability and growth of S. aureus upon brief (30 s) activation by a portable hand-held infrared laser. In order to gauge the effect of exposure and its correlation with the antibacterial activities, both isolated (only titania substrate) and simultaneous (substrate submerged in the bacterial suspension) activations were performed. The bactericidal efficacy of the IR-activated $TiO_2$ nanocoatings was also tested against E. coli biofilms. Toxicity study was conducted to assess any potential harm to the tissue cells in the presence of photoactivated materials. These investigations showed that the photoactivated titania nanofibers caused greater than 97% bacterial necrosis of S. aureus. In the case of titania-coated Ti-implant surrogates, the bactericidal efficacy exceeded 90% in the case of pre-activation and was 100% in the case of simultaneous-activation. In addition to their high bactericidal efficacy against S. aureus, the benignity of titania nanofibers and nanocoatings towards tissue cells during in-vivo exposure was also demonstrated, making them safe for use in implant devices.