• Journal of Biosystems Engineering
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• v.29 no.4
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• pp.323-328
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• 2004

A surface plasmon resonance (SPR) sensing system, which belonged to a family of thin film refractometry-based sensors, was fabricated to measure the alcohol contents in alcoholic beverages. In this study, a SPR owe was obtained by a photodiode array with 128 pixels and transformed into a refractive index which was calculated by means of the first moment of values below a baseline of 0.85. When the sensing system was applied to Soju, Cheonju, Igwaduju and Tacju highly linear relationships between the refractive index by SPR and the contents of alcohol were obtained. That is, the coefficients of determination in their linear models were 0.992, 0.933, 0.918 and 0.954, respectively. Meanwhile, the effect of sample preparations on the accuracy of measurement was analyzed. As for Soju and Tacju, the best calibration equations were obtained when no sample preparation was applied. The best calibration models for measurement of Cheonju and Igwaduju were obtained through the samples filtered by $C_{18}$ disks.

• Journal of the Korean Solar Energy Society
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• v.38 no.5
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• pp.75-84
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• 2018

The most crucial point of reducing building energy is application of high performance envelope. The amount of heat exchange through window is highest in comparison of other envelopes so that heat exchange through window influence directly with building energy consumption. The window energy performance can be define with thermal, leakage and optical performance. In previous study we can confirmed that not only thermal performance but also optical performance are considered, 11% to 15% of building energy consumption can be reduced. Smart window system has potential of energy saving so that many industry field use smart window system including architectural area and these aspect causes smart window market continuous growth year by year. In this study, building energy consumption has been analyzed which consist of smart window that dynamically control optical states. The consideration of standard commercial building model for research, the reference medium size commercial building model of DOE (Department Of Energy, USA) has been used. The building energy simulation result of 4 axis in 8 regions in Korea shows 8% to 22% reduction of building energy consumption by application of smart window system.

• Proceedings of the Korean Society for Food Science of Animal Resources Conference
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• 2004.05a
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• pp.190-193
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• 2004

• Journal of Family Resource Management and Policy Review
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• v.9 no.3
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• pp.69-95
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• 2005

The purpose of this study was to analyze the needs and demands of middle-aged women concerning the educational contents of tea-culture, the managing methods of educational programs, and a plan to invigorate tea culture education as a whole. Here is the summary of the main results. 1) The need for tea-culture education scored an average of 4.14 / 5(maximum score). The actual needs for tea-culture education had varied according to the women's place of living, educational motives, and the desire to become lecturers in the future. That is, the actual needs for tea-culture education scored high among the groups who displayed strong personal motives to cultivate their inner minds and learn tea-culture seriously, groups who lived in Seoul${\cdot}$Taegu${\cdot}$Cheonju, and groups who wanted to become future lecturers. 2) The need for a systematic management of tea-culture educational programs scored an average of 4.10 / 5(maximum score). The need for a management of tea-culture educational programs varied according to the women's educational level and their desire to become future lecturers. That is, the need for a systematic management of tea-culture educational programs scored high among groups whose educational level was high, and groups who wanted to become future lecturers. 3) The need for a plan to invigorate tea-culture education scored an average of 4.05 / 5(maximum score). The need for a plan to invigorate tea-culture education varied according to the women's place of living, educational level, the managing subject of educational organizations, the desire to become future lecturers. That is, the need for a plan to invigorate tea-culture education scored high among the groups who lived in Seoul${\cdot}$Taegu${\cdot}$Cheonju, groups whose educational level was high, groups who were members of life-long educational facilities within universities, and groups who desired to become future lecturers.

• Analytical Science and Technology
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• v.14 no.2
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• pp.95-102
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• 2001

A comprehensive analytical method of endocrine disruptors[i.e., nonylphenol(NP), octylphenol(OP), bis(2-ethylhexyl) phthalate(BEHP)] in meat or pork samples was developed. The method employed closed culture tube extraction with dichloromethane and solvent exchange to iso-hexane and SPE(2g) aminopropyl column, followed by determination on gas chromatography linked to mass spectrometry(GC/MS) operated in the single ion monitering(SIM) mode. For the multipoint recovery of nonylphenol, octylphenol and bis(2-ethlhexyl) phthalate OP, NP were showen good recoveries in $0.125-1.25{\mu}g/g$ range of concentration, and BEHP more good recoveries in $0.0125-12.5{\mu}g/g$ wide range of concentration. The present method was applied to beef or pork samples of mart and butcher in Cheonju city and near Cheonju. The range of concentrations was respectively, $0.06-0.24{\mu}g/g$ in nonylphenol(NP) and $0.36-2.35{\mu}g/g$ in bis(2-ethylhexyl) phthalate(BEHP), but octylphenol(OP) was not dected in any samples. This method provides a powerful analytical tool to investigate a wide range of endocrine disruptors in biological samples of limited quantity.

• Journal of the Korean Society of Tobacco Science
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• v.12 no.2
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• pp.91-101
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• 1990

A field experiment was conducted to find out the effects of field productivity, variety and nitrogen rate on the yield, quality, chemical constituents and physical properties of burley cured leaf in three field with different productivity(Degree of field productivity: A ; high, B ; medium, C : low) during successive two years(1988~89). The yield and quality were remarkably lowered when nitrogen fertilizer being applied much in low productive field. As compared with Burley 21, KB101 showed high yield, particularly the yield of KB101 in low productive field was relatively high. The effect of nitrogen rate on the yield was somewhat different according to field productivity and production year. When the nitrogen fertilizer being applied above 22.5kg/10a, the added nitrogen had no effect on the yield. Total nitrogen content of cured leaf grown in low productive field was high while total alkaloid was low, therefore total alkaloid/total nitrogen ratio was remarkably low. The lightness, red and yellow color of cured leaf grown in low productive field was remarkably low. As compared with Burley 21, the contents of total alkaloid and total nitrogen and shatter resistance index of cured leaf was somewhat low, while the filling power, lightness, red and yellow color were slightly high. Total nitrogen content of cured leaf was increased remarkably by nitrogen addition, but total alkaloid was not increased though the nitrogen fertilizer being applied above 22.5kg/10a. The filling power and shatter resistance index of cured leaf grown in high nitrogen plot, and the lightness and yellow color were low while the red color was relatively high. It comes into question that the visual quality being increased as well as increment of yield and nitrogenous compounds by nitrogen addition in high productive field. In low productive field, it is considerable that nitrogen addition for high yield should be prohibited because it causes the decrement of yield and quality, on the contrary.

• Journal of Korean Society for Quality Management
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• v.22 no.1
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• pp.152-161
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• 1994

In this paper we develop a test for alternatives representing decreasing mean residual life. The test statistic for decreasing mean residual life, $K_{1n}$, is a modified version of Hollander and Proschan's test $V^*$ and critical constants and large sample approximation are shown to make the test readily applicable. Consistency is also shown for the tests based on $K_{1n}$. And small sample powers for four alernatives are obtained.

• Korean Journal of Hospice Care
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• v.2 no.2
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• pp.17-27
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• 2002

Purpose: The purpose of this study was to elucidate the effects of spiritual nursing intervention on anxiety and depression of the hospice patients. This study was devised one group pretest-posttest design. The data was collected during the period from July 10 to September 25 in 2000 at the general hospital in cheonju city. The subjects were thirty-seven patients who referred the hospice service. Method: The tools were used Spielberger's State Anxiety Scale and Zung's Depression Inventory. The spiritual nursing intervention was carried out through Hymn, Scripture, Prayer, the therapeutic use of self over a period of three weeks. Data were analyzed by frequency, percentage, mean, standard deviation, paired t-test. Results: 1.After the spiritual nursing intervention, state anxiety of hospice patients was reduced(t=6.237, p=0.000). 2.After the spiritual nursing intervention, depression of hospice patients was reduced(t=18.58, p=0.000). Conclusion: The hospice patients who were offered spiritual nursing intervention had lower anxiety & depression than those who were not offered spiritual nursing intervention. According to these results, spiritual nursing intervention can be regarded as an effective nursing intervention that relieved anxiety and depression of the hospice patients.

• Journal of KIEE
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• v.10 no.1
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• pp.7-15
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• 2000

Source separation is a statistical method, the goal of which is to separate the linear instantaneous mixtures of statistically independent sources without resorting to any prior knowledge. This paper addresses a source separation algorithm which is able to separate the mixtures of sub- and super-Gaussian sources. The nonlinear function in the proposed algorithm is derived from the generalized Gaussian distribution that is a set of distributions parameterized by a real positive number (Gaussian exponent). Based on the relationship between the kurtosis and the Gaussian exponent, we present a simple and efficient way of selecting proper nonlinear functions for source separation. Useful behavior of the proposed method is demonstrated by computer simulations.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2003.04a
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• pp.119-120
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• 2003

Many fungi were collected at Mt. Daedun Provincial Park between the periods from March 2001 to October 2002 and they were identified. According to the results, the fungi diversity included 2 division, 3 subdivisions, 5 classes, 4 subclasses, 12 orders, 35 families, 75 genera and 153 species. Among them Ileodictyon is unrecorded genus and Ileodictyon gracile, Mycena flosum-nivium and Tricholoma lascivum are newly to Korea. Dominant family are Tricholomataceae, Russulaceae and Polyporaceae;genus Amanita and species Collybia confluens and Russula emetica In useful fungi and ecological resources, edible fungi included 51 species; culture fungi 10; poisonous fungi 18: medicinal fungi 17: anticancer fungi 22: ectomycorrhizal fungi 26 and wood rotting fungi 51, In geographical distributions of Chonbuk areas, same species are 50 spcies of Jeongup ; 56 of Mt.Manduck : 84 of Mt.Jiri : 28 of Pyonsan national park : 59 of Cheonju arboretum and 51 of Mt,Sunun.