• The Transactions of The Korean Institute of Electrical Engineers
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• v.64 no.2
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• pp.284-288
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• 2015

The color temperature flexibility-typed Lighting Emitting Diode(LED) lighting control system proposed in this thesis employs Pulse Width Modulation(PWM) technique to control the brightness of LED lighting. The LED lighting used as a light source has 20W downlight composed of two types of LED chips: one is Warm White and the other is Cool white. One multi-sensor module consisting an infrared sensor, an illumination sensor, and a temperature sensor was made, to which Bluetooth wireless communication technique was applied to enable a smartphone application to control lighting brightness and identify the information collected from the sensor. CS-1000, a spectroradiometer, was used to measure LED dimming control and the changing values of a color temperature in eight steps. According to a test, it was found that it was possible to change a color temperature from 3187K of Warm White LED to 5600K of Cool White LED.

• Journal of the Korean Home Economics Association
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• v.44 no.6 s.220
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• pp.121-127
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• 2006

The purpose of this study is to investigate the sin satisfaction and fitness of Chinese women for Korean-made women's suits. The study methodology was questionnaire survey and the subjects were randomly chosen, 20 to 49-year-old female shoppers at department stores in Beijing, China. The data analyses were performed with SPSS 12.0 through descriptive analysis, t-test, and crosstab analysis. The findings were as follows. Chinese women assessed both the fit satisfaction and fit suitability levels of Korean-made women's suits available in China to be higher than that of Chinese-made women's suits. Paticularly, in the tan of slacks showing the lowest suitability level among Chinese-made women's wear, Korean-made women's suits in China had outstandingly high suitability level. In the case of jackets, however, the Korean-made women's suits went through more fixings, on average, than Chinese-made women's suits. In addition, more fixings were done for enlargement than for contraction, which necessitated the measure changes.

• Biomedical Science Letters
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• v.19 no.1
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• pp.79-82
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• 2013

Parkinson's disease is a neurodegenerative disease with a wide range of dopaminergic neuron cell death in the substantia nigra. Oxidative stress and neural degeneration are suggested to be involved in the pathogenesis of Parkinson's disease. In this study, we investigated whether a novel herbmedicine, Hepad protects against 1-methyl-4-phenylpyridnium [MPP(+)]-induced dopaminergic neurotoxicity in SH-SY5Y cells. We found that pretreatment with Hepad significantly increases the proliferation of SH-SY5Y cells (P<0.05) and reversed the loss of cell viability induced by $MPP^+$. Hepad may be a promising neuroprotective agent for the treatment of neurodegenerative disorders such as Parkinson's disease.

• The Journal of Korean Medical History
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• v.26 no.2
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• pp.99-110
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• 2013

The purpose of this study is to investigate the life and achievements of a doctor whose name is Baek Kwang-hyeon. He was at first a soldier and later became a doctor. After years of practicing, he was chosen as a acupuncture specialist doctor of Royal Office of Medicine. He was also chosen as a Royal doctor. The method to do this study was to read the book "Jisagongyousa Bukyunghumbang(知事公遺事 附經驗方)", which is writing about his life and medical achievements. Also "Seongjeongwon Ilgi(承政院日記)" was searched to find more about Dr. Baek's life. The results were as follows. More unknown records about his life and works could be found. His medical achievements and originality could also be clarified. Through above books and other records, the annual report of his life could be presented at the end of this stuy.

• Journal of the Korean Society for Precision Engineering
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• v.30 no.9
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• pp.1001-1006
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• 2013

Projection-based stereolithography is divided into constrained-surface and free-surface type according to controlling liquid layer. The constrained-surface type has a uniform layer thickness due to the use of a projection window, which covers the pattern generator such as liquid crystal display. However, the adhered resin on the projection window causes trouble and requires great separation force when the cured layer is separated from the window. To minimize the separation force, we developed a system to measure the separation force. The influence of material covering the pattern generator and the resin temperature is investigated in the system. Several structures according to the resin temperature and the velocity of z-axis elevation are compared. As a result, the fabrication condition to minimize the separation force reduces the process time.

• Korean journal of food and cookery science
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• v.30 no.2
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• pp.119-128
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• 2014

The purpose of this study is to propose the optimum adding rate of freeze-drying beet leaf powder, which has antioxidant components, that have superior DPPH radical extinction effects, in the Sulgidduk, a representative of steamed rice cake, which improve its functionality. According to the measured results on moisture contents and pH levels of Sulgidduk, with added freeze-drying beet leaf powder, the moisture contents have been significantly declined with increasing rates of added beet leaf powder. The pH levels of sample groups are within the range of 6.26-6.13. From the chromatography of measured results, lightness and yellowness have declined and redness have increased along with increasing rates of added beat leaf powder. According to the texture of measured results, the hardness, and chewiness have declined by the increasing the rate of added beet leaf powder. For the storage period, hardness, and chewiness have been inclined, but cohesiveness declines, with increased the storage period, while there are no changes from elasticity. The DPPH contents of Sulgidduk, with added freeze-drying beet leaf powder, inclined by increasing the rates of added beet leaf powder. The sensory test results of color, aroma and fragrance incline with increasing rates of added beet leaf powder. From acceptance test results, the sample group added with 3% receive the highest appraisals.

• 대한생식의학회:학술대회논문집
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• 2007.06a
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• pp.147-147
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• 2007

• Spatial Information Research
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• v.16 no.3
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• pp.291-301
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• 2008

While most GIS are based on Euclidean space, cellular space can be used as an alternative type of space for a large number of GIS applications. In order to analyze the pattern of moving objects in cellular space, we need new definitions of similarity between their trajectories since the trajectory in cellular space significantly differs from those in Euclidean space. In this paper, we study the properties of moving objects in cellular space. Based on these observations, we propose several similarity measures between trajectories in cellular space. We analyze the difference of the proposed measures by experiments.

• Korean Journal of Crystallography
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• v.12 no.3
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• pp.137-140
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• 2001

Compound PdCl₂(Phc≡N)₂(1) reacted with 2,6-diisopropylaniline to give trans-[Pd(NH₂-C/sub 6/-H₃-2, 6-i-Pr₂)₂Cl₂] (2). Compound 2 was characterized by spectroscopy (¹H-NMR, /sup 13/C-NMR, and IR) and X-ray diffraction. Crystallographic data for 2: monoclinic space group P2₁/n, a=13.532(3) Å, b=5.749(1) Å, c=17.880(4)Å, β=103.84(2)°, Z=2, R(wR₂)=0.0466(0.1226).

• Journal of the Korea Society of Computer and Information
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• v.17 no.7
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• pp.23-32
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• 2012

There is a method which identifies validity of program by transforming program to verification condition to verify program. If program is verified by generating verification condition, verification condition must have enough and accurate information for verifying program. However, verification condition is consisting of logical formulas, so the user cannot easily identify the verification condition. In this paper, we implemented program that visualize the poorly readable verification conditions. By the program, the users can easily identify information, such as the relationship between logical formulas that represent verification condition.