• 패션비즈니스
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• 제7권6호
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• pp.32-49
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• 2003

The purpose of this study is to examine the characteristics and differences of Chinese adult women's torsos by sampling Chinese college women and measuring their torsos and thereupon, develop a torso prototype fitting their torso characteristics and thereby, improve the fitness of the clothing products exported to China. For this purpose, body sizes were comparatively measured between Chinese and Korean college women to determine the differences of body shapes between the two groups, and thereupon, a torso prototype was produced. Then, the prototype was checked with senses, and was modified and complemented three times. In the final torso prototype, waist front and back length was reduced in consideration of Chinese women's body shapes, and neck side - nipple length was extended because Chinese women's chests are pushed out, and additionally, front shoulder dart volume was readjusted. In addition, the fitness of the prototype was tested by setting the S and L size intervals as well as the basic size (M). It is hoped that the results of this study would be useful to the Korean clothing companies exporting their products to China.

• 한국대기환경학회지
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• 제15권5호
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• pp.657-665
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• 1999

Particulate matter produced by diesel engines is of concern to cngine manufactures because of its environmental impact. The majority of diesel particles are in the range of smaller than 1 ${\mu}{\textrm}{m}$. Because of their tiny volume, ultrafine diesel particles contribute very little to the total mass concentration which is currently regulated for automobile emissions. Ultrafinc particles are known to have deleterious effects upon human health cspecially because they penetrate deeply human respiratory tract and have negative effects on the health. In this study, the engine exhaust gas was diluted in a dilution tunnel and the particle size distribution was measured using the scanning mobility particel sizer system. Measurements of the number and the mass concentrations of the diesel exhaust were made under different engine ooperating conditions. The dilution sampling system provided a common basis for collection of the exhaust by cooling and diluting the source emission prior to the measurement. The measurement results showed that the particle size distributions of the exhaust from the diesel vehicles equipment with either heavy-duty or lignt-duty diesel engines, were similar in the particle size range of 0.08~0.2${\mu}{\textrm}{m}$.

• 한국연소학회지
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• 제9권2호
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• pp.38-44
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• 2004

The evolution of incipient soot particles has been examined by high resolution electron microscopy (HRTEM) and elemental analyzer in ethylene-air inverse diffusion flames. Laser Induced Incandescence(LII) and laser scattering methods were introduced for examining the soot volume fraction and morphological properties in combustion generated soot qualitatively. Soot particles, collected by thermophoretic sampling, were analyzed by using HRTEM to examine the nano structure of precursor particles. HRTEM micrographs apparently reveal a transformation of condensed phase of semitransparent tar-like material into precursor particles with relatively distinct boundary and crystalline which looks like regular layer structures. During this evolution histories, C/H analysis was also performed to estimate the chemical evolution of precursor particles. The changes of C/H ratio of soot particles with respect to residence time can be divided into two parts: one is a very slowly increasing regime where tar-like materials are transformed into precursor particles (inception process) the other is an increasing region with constant rate where surface growth affects the increase of C/H ratio dominantly (surface growth process). These results provide a clear picture of a transition to mature soot from precursor materials.

• Bulletin of the Korean Chemical Society
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• 제33권12호
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• pp.3963-3970
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• 2012

Headspace (HS) and headspace solid-phase microextraction (HS-SPME) were studied for extracting volatile organic compounds (VOCs) from whole blood, with chemical and instrumental variables being optimized for maximum sensitivity: incubation at $60^{\circ}C$, equilibration for 30 min, pH 11, and 2 mL injection volume. Both techniques provided accurate analyses, with detection limits of 0.05-0.1 ng $mL^{-1}$ and 0.05-0.5 ng $mL^{-1}$. HS showed better sensitivity, reproducibility, and analysis times than HS-SPME. Overall levels of chloroform in whole blood were found to be 0.05-5.84 ng $mL^{-1}$; detected levels of benzene were 0.05-2.20 ng $mL^{-1}$.

• Bulletin of the Korean Chemical Society
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• 제30권11호
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• pp.2675-2679
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• 2009

This paper reports the example of headspace mulberry paper bag micro solid phase extraction (HS-MPB-$\mu$-SPE) as a new sampling method for the determination of volatile flavor composition of coriander seeds. Adsorption efficiencies between two configurations of mulberry paper bag were compared, and several parameters affecting the HS-MPB-$\mu$-SPE were investigated and optimized. The optimized technique uses an adsorbent (Tenax TA, 0.1 mg) contained in a mulberry paper bag of front configuration where fine surface was outside, and minimal amount of organic solvent (0.6 mL). Linalool and $\gamma$-terpinene were found as abundant flavor compounds from coriander seeds. The limit of detection (LOD) and the limit of quantitation (LOQ) for linalool of major flavor in coriander seeds were 10.3 ng/mL and 34.4 ng/mL, respectively. The proposed method showed good reproducibility and good recovery. The HS-MPB-$\mu$-SPE is very simple to use, inexpensive, requires small sample amounts and solvent consumption. Because the solvent for extraction is reduced to only a very small volume, there is minimal waste or exposure to toxic organic solvent and no further concentration step.

• 대한화학회지
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• 제21권1호
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• pp.44-52
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• 1977

透析係數가 常數로서 나타날 수 있는 條件究明의 一環으로서 透析液 單位體積當의 透析膜面積인 比表面積과 透析膜孔의 크기가 透析에 미치는 영향을 究明하였다. 1回의 透析實驗에서 任意時間區間마다 任意부피의 透析液試料를 잇따라 菜取하는 方法(間歇試料菜取法이라 呼稱하기로 함)은 透析係數를 求하는 方法으로서 採擇할 수 있음과, 또한 透析膜孔이 상당히 크더라도 膜을 通한 擴散係數는 自由擴散係數에 미치지 못함을 밝히었다.

• 보건교육건강증진학회지
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• 제29권4호
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• pp.1-13
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• 2012

Objectives: By analysing the recent trends of published papers in the Korean Journal of Health Education and Promotion, this study aims to identify and discuss some challenging issues, and to provide recommendations for quality improvement of the research papers. Methods: One hundred and sixty five papers published between 2009 and 2011 were examined and categorized according to selected standards. Results are displayed in frequencies and percentages. Results: The volume of articles published has increased by two-folds in three decades since the publication of the first issue. More than 90% of the papers were original articles. Cross-sectional research design was most frequently applied, while only 11.5 % of the articles were intervention studies. For cross-sectional research articles, limitation in generalizability of the study findings was mentioned as one of the major issues, in relation with the frequent use of convenient sampling methods and lack of theoretical evidence in inclusion of variables. Consideration of internal and external validity of the study, utilization of scientific evaluation design and mixed evaluation methods were recommended for intervention research to improve the quality of the research results. Conclusion: To serve as a key resource for evidence-based practices in health promotion, more strict scientific research criteria should be applied to the articles published in the Korean Journal of Health Education and Promotion.

• 한국대기환경학회지
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• 제24권1호
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• pp.100-107
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• 2008

The objective of this study was to quantitatively estimate PM-10 source contribution in Gumi City, Korea. Ambient PM-10 samples were collected by a high volume air sampler, which operated for 84 different days with a 24-h sampling basis, from June 14,2001 though May 19, 2003. The filter samples were analyzed for determining 13 inorganic elements, 3 anions, and a total carbon. The study has intensively applied a receptor model, the PMF (Positive Matrix Factorization) model. The results from PMF modeling indicated that a total of seven sources were independently identified and each source was contributed to the ambient Gumi City from secondary sulfate (34%), motor vehicle (26%), soil relation (5%), field burning (3%), industrial relation (3%), secondary nitrate (22%), and incinration (7%) in terms of PM-10 mass, respectively.

• Nuclear Engineering and Technology
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• 제50권3호
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• pp.439-445
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• 2018

Experimental measurements of the response of $BF_3$ detector to a 3 Ci Am-Be neutron source for three different reflecting materials, i.e., aluminum, wood, and Perspex of varying thicknesses have been carried out. The varying contribution of wall effect to the response due to change in active volume of the detector has also been determined experimentally. Then, a Monte Carlo code has been developed for the calculation of the neutron response function of the $BF_3$ detector using source biasing and importance sampling. This code simulates the $BF_3$ detector response exposed to the neutron field in a three-dimensional source, detector, and reflecting medium configurations. The results of simulation have been compared with the corresponding experimental measurements and are found to be in good agreement. The experimental neutron albedo measurements for various values of Perspex thickness show saturating behavior, and results agree very well with the data obtained by Monte Carlo simulation.

• Journal of Nutrition and Health
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• 제39권2호
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• pp.201-211
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• 2006

The purpose of this study was to analyze the determinants affecting the consumer-brand relationship quality (CBRQ) in the fast food restaurant. The questionnaires were distributed to 250 students in the K University located in Masan, who were sampled by convenience-sampling method from December, 6 to 14, 2004. The 246 questionnaires were responded, and 12 unusable questionnaires were excluded, then 234 were used for the final analysis (response rate: 93.7%). SPSS (12.0) was used for the statistical analysis. The result of this study showed that the CBRQ of low monthly income group was significantly lower than that of high monthly income group (p < .05), and the CBRQ of more frequent visiting group was significantly higher than that of less frequent visiting group (p < .001). The CBRQ of group who spend less than 30 minutes on their visiting the fast food restaurant was lower than that of group who spend more than 30 minutes (p < .01). As a conclusion, the operators in the fast food restaurant should focus on the concentrated marketing strategy for the frequent-visiting customers who had a strong quality of consumer-brand relationship in order to increase sales volume, and at the same time they should try to make marketing strategy to induce the less frequent-visiting customers who had less strong consumer-brand relationship quality to their restaurants in order to strengthen quality of consumer-brand relationship, which would be resulted to lead them to their restaurant more frequently.