• Korean Journal of Community Nutrition
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• v.11 no.5
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• pp.618-628
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• 2006

The purpose of this study was to examine the donators' characteristics and donative foods of both government-dominant and non-governmental food bank program, to understand the problems and benefits of food bank program, and to find the solutions to activate food bank program. The questionnaires were distributed to 120 food bank operators and 3 donators were selected from each food bank for the survey from April 2002 to May 2002. 118 sheets (32.8%) from government-dominant food bank and 53 sheets (20.1%) from non-governmental food bank were collected. The main results of this study were as follows: The largest donators to either government-dominant or non-governmental food bank programs were bakery and confectionery companies 31.4% and 45.3% respectively. The majority of donated foods were 'goods in stock' (55.6%) and frequency of donation were largely on a daily basis (27.1% for government-dominant and 22.6% for non-governmental). Some of the donators who had more donative food did not donate, and the reasons were closeness to expiration date of food (67.3%), lack of legal protection in the event of food poisoning (54.5%), and poor public image of food related accidents (52.3%).

• Journal of electromagnetic engineering and science
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• v.11 no.1
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• pp.42-50
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• 2011

One of the important applications of THz time-domain spectroscopy (TDS) is the detection of explosive materials through identification of vibrational fingerprint spectra. Most recent THz spectroscopic measurements have been made using pellet samples, where disorder effects contribute to line broadening, which results in the merging of individual resonances into relatively broad absorption features. To address this issue, we used the technique of parallel plate waveguide (PPWG) THz-TDS to achieve sensitive characterization of three explosive materials: TNT, RDX, and HMX. The measurement method for PPWG THz-TDS used well-established ultrafast optoelectronic techniques to generate and detect sub-picosecond THz pulses. All materials were characterized as powder layers in 112 ${\mu}m$ gaps in metal PPWG. To illustrate the PPWG THz-TDS method, we described our measurement by comparing the vibrational spectra of the materials, TNT, RDX, and HMX, applied as thin powder layers to a PPWG, or in conventional sample cell form, where all materials were placed in Teflon sample cells. The thin layer mass was estimated to be about 700 ${\mu}g$, whereas the mass in the sample cell was ~100 mg. In a laboratory environment, the absorption coefficient of an explosive material is essentially based on the mass of the material, which is given as: ${\alpha}({\omega})=[ln(I_R({\omega})/I_S({\omega}))]m$. In this paper, we show spectra of 3 different explosives from 0.2 to 2.4 THz measured using the PPWG THz-TDS.

• Management & Information Systems Review
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• v.36 no.2
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• pp.93-111
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• 2017

This study aims to examine economic effects and success factors of ICT based growth engine industry for forth generation industrial revolution. KTRS(kibo Technology Rating System) provided by KIBO is used for an analysis of this study. Specifically, the economic effects of growth engine industy are classified with financial(productivity, growth rate, etc) and non-financial(R&D investment and employment) effects. Moreover, the impacts of KTRS factors including CEO capability, technology ability, commercialization and marketability on the economic effects are investigated. The result of this study would raise management issues on technology innovation and provide implications on industrial policies for ICT based growth engine industry.

• Journal of the Semiconductor & Display Technology
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• v.14 no.3
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• pp.51-55
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• 2015

We have fabricated silver nanowire (AgNW) films as a stretchable and transparent electrode on polydimethylsiloxane (PDMS) substrates using a spray coater. Inherently, they show poor surface roughness and stretchability. To tackle it, we have employed a conductive polymer, poly (3,4-ethylenedioxythiophene) : Poly(styrene sulfonate) (PEDOT : PSS). PEDTO : PSS solution is mixed with AgNWs or spin-coated on the AgNW film. Compared with AgNW film only, PEDOT : PSS film only, and polymer-mixed AgNW films, the AgNW/polymer bilayer films exhibit much better surface roughness and stretchability. It is found that spray-coating of AgNWs on uncured PDMS and spin-coating of PEDOT : PSS solution on the AgNW films enhance the surface roughness of electrodes. Such a bilayer structure also provides a stable resistance under tensile strain due to the fact that each layer acts as a detour route for carriers. With this structure, we have obtained the peak-to-peak roughness ($R_{pv}$) as low as 76.8nm and a moderate increase of sheet resistance (from $10{\Omega}/{\Box}$ under 0% strain to $30{\Omega}/{\Box}$ under 40% strain).

• Archives of Pharmacal Research
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• v.28 no.4
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• pp.488-492
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• 2005

The purpose of this study is to investigate the bioequivalence of two haloperidol 5 mg tablets, Myung In haloperidol (Myung In Pharm. Co., Ltd., test drug) and $Peridol^{R}$(Whanin Pharm. Co., Ltd., reference drug), and also to estimate the pharmacokinetic parameters of haloperidol in Korean volunteers. The bioavailability and pharmacokinetics of haloperidol tablets were examined on 24 healthy volunteers who received a single oral dose of each preparation in the fasting state in a randomized balanced 2 way crossover design. After an oral dosing, blood samples were collected for a period of 60 h. Plasma concentrations of haloperidol were determined using a liquid chromatographic electrospray mass spectrometric (LC-MS) method. The pharmacokinetic parameters were calculated with noncompartmental pharmacokinetic analysis. The geometric means of $AUC_{0-60h} and C_{max}$ between test and reference formulations were $17.21\pm8.26 ng\cdot/mL vs 17.31\pm13.24 ng\cdot/mL and 0.87\pm0.74 ng/mL vs 0.85\pm0.62 ng/mL$. respectively. The $90\%$ confidence intervals of mean difference of logarithmic transformed $AUC_{0-60h} and C_{max} were log0.9677{\sim}log1.1201 and log0.8208{\sim}log1.1981$, respectively. It shows that the bioavailability of test drug is equivalent with that of reference drug. The geometric means of other pharmacokinetic parameters ($AUC_{inf}. t_{1/2}, V_{d}/F, and CL/F$) between test drug and reference drug were $21.75\pm8.50 ng{\cdot}h/mL vs 21.77\pm15.63 ng{\cdot}h/mL, 29.87\pm8.25 h vs 29.60\pm7.56 h, 11.51\pm5.45 L vs 12.90\pm6.12 L and 0.26\pm0.09 L/h vs 0.31\pm0.17 L/h$, respectively. These observations indicate that the two formulation for haloperidol was bioequivalent and, thus, may be clinically interchangeable.

• Journal of Korean society of Dental Hygiene
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• v.15 no.2
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• pp.253-259
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• 2015

Objectives: The purpose of this study was to investigate the oral health behavior according to oral health education experience in the elementary school teachers and to provide the basic data for the development of oral health education program. Methods: A self-reported questionnaire was filled out by 239 elementary school teachers in Busan and Ulsan from May 7 to 31, 2013. The questionnaire consisted of general characteristics of the subjects, use of oral health devices, dental clinic visit within a year, purpose of dental clinic visit, subjective oral health condition, place and contents of oral health education, future contents of oral health education, purpose of tooth brushing, recognition of sealant, recognition of dental caries prevention effect of fluoride, and method and frequency of tooth brushing. Data were analyzed by Predictive Analysis Software(PASW) Statistics $19.0^{(R)}$(SPSS Inc., Chicago IL, USA). Results: Of the 239 teachers, 187 teachers had oral health education experience and 52 did not. Those who had oral health education experience reported higher scores in tooth brushing than those who did not. 59.4% of the respondents answered the experience of oral health education in dental clinics. Conclusions: Oral health behavior was different from the experience of oral health education in the elementary school teachers. The teachers are the most important persons influencing on the right tooth brushing habit in the students. So the teachers must take the continuing and systematic oral health education.

• The Korean Journal of Physiology and Pharmacology
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• v.4 no.1
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• pp.41-46
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• 2000

Using fluorescence polarization of 12-(9-anthroyloxy)stearic acid (12-AS) and 2-(9-anthroyloxy)stearic acid (2-AS), we evaluated the differential effects of local anesthetics on differential rotational rate between the surface (in carbon number 2 and its surroundings including the head group) and the hydrocarbon interior (in carbon number 12 and its surroundings) of the outer monolayer of the total lipid fraction liposome extracted from synaptosomal plasma membrane vesicles. The anisotropy (r) values for the hydrocarbon interior and the surface region of the liposome outer monolayer were $0.078{\pm}0.001$ and $0.114{\pm}0.001,$ respectively. This means that the rate of rotational mobility in the hydrocarbon interior is faster than that of the surface region. In a dose-dependent manner, the local anesthetics decreased the anisotropy of 12-AS in the hydrocarbon interior of the liposome outer monolayer but increased the anisotropy of 2-AS in the surface region of the monolayer. These results indicate that local anesthetics have significant disordering effects on the hydrocarbon interior but have significant ordering effects on the surface region of the liposome outer monolayer.

• Journal of Korean society of Dental Hygiene
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• v.20 no.3
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• pp.369-378
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• 2020

Objectives: The purpose of this study is to examine the correlation between the critical thinking disposition of dental hygienists and the variables associated with clinical decision making and job performance to analyze factors affecting job performance. Methods: A questionnaire survey was administered to 166 dental hygienists from June 24 to August 8, 2019. We analyzed results with t-test, Mann-Whitney U test, ANOVA, Pearson's correlation analysis and a multiple regression analysis using the SPSS Windows version 23.0(SPSS Inc. IL, USA). Results: Critical thinking disposition was the highest for open-mindedness and clinical decision making ranked highest for canvassing of objectives and values. Job performance ranked highest in terms of assist with dental treatment. Factors affecting dental hygienists' job performance were clinical decision making and critical thinking disposition(p<0.001, adj. R² =31.4). Conclusions: It is expected that this study will provide basic data for the development of programs to enhance the job performance of dental hygienists. Furthermore, it is necessary to actively support plans such as conducting seminars at dental institutions and providing educational participation opportunities.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2006.06a
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• pp.329-330
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• 2006

본연구에서는 초음파 모터 등의 고출력 액츄에이터에 응용 가능한 $0.4Pb(Ni_{1/3}Nb_{2/3})O_3$-$0.6Pb(Zr_{0.405}Ti_{0.595})O_3$ + 0.25wt% $Fe_2O_3$ 조성시스템에 $MnO_2$ (0~1 wt.%)첨가하여 압전, 유전특성 및 미세구조에 관해 고찰하였다. 본조성을 $1125{\sim}1175^{\circ}C$ 온도에서 2시간 소결하여 시편을 제조하였으며 이의 결정구조 및 미세조직을 분석하였다. $MnO_2$ 첨가량 증가에 따라 압전 상수와 전기기계결함계수는 감소하였으며, 기계적 품질계수는 0.5 wt% 첨가시까지 증가하였으나 첨가량이 그 이상 증가함에 따라 감소하였다. 압전특성은 $1125^{\circ}C$에서 소결한 $MnO_2$ 0.5wt%조성에서 ${\varepsilon}r$ = 2040, kp = 0.66, $d_{33}$ = 504, Qm=438의 우수한 특성을 나타내었다.

• Polymer(Korea)
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• v.35 no.4
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• pp.342-349
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• 2011

The effect of the amount of vinyltriethoxysilane (VTEOS) in precipitated silica filled silicone rubbers was extensively investigated in terms of the change of mechanical properties, heat resistance, oil resistance, compression set, resilience, and curing characteristics. As the content of VTEOS increased from 0 to 2.0 phr, the hardness of the silicone rubber increased, however, tensile strength, elongation at break, and tear strength decreased. From heat resistance test, the change of mechanical properties was pronounced for silicone rubber treated with more VTOES. The best heat resistance was achieved at 2.0 phr VTOES. In addition, oil resistance was proportionally improved with VTEOS content. From oil resistance test. it was found that the decrease in hardness and maximum elongation was reduced for VTEOS-added systems. Finally, resilience, compression set, degree of cure and crosslink density were significantly enhanced with the amount of VTEOS.