• Journal of the Semiconductor & Display Technology
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• v.3 no.3
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• pp.31-35
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• 2004

A blue light emitting diode with 8 periods InGaN/GaN multi-quantum well structure grown by metal-organic chemical vapor deposition was fabricated with the inclusion of the metal-interconnection process in order to integrate the chips for light lamp. The quantum well structure provides the blue light photoluminescence peaked at 479.2 nm at room temperature. As decreasing the temperature to 20 K, the main peak was shifted to 469.7 nm and a minor peak at 441.9 nm appeared indicating the quantum dot formation in quantum wells. The current-voltage measurement for the fabricated LED chips shows that the metal-interconnection provides good current path with ohmic resistance of 41 $\Omega$.

• Journal of the Korean Society of Costume
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• v.61 no.5
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• pp.139-146
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• 2011

In South Korea, hospital clothes for medical staff, which require high performance and functionality, are still regarded just as uniforms. Few researches have been made into the underwear for operating room staff, which is intended to protect medical staff against possible risks happening during an operation and allow them to do their job in an easy and comfortable manner. In order to present a new design of underwear for operating room staff at general hospitals in South Korea, an investigation was made into medical staff's preference for overseas brand samples, and it was found that they preferred to wear such clothes as are blue-colored, of a V-neck line, of a box style and has good absorptiveness and breathability. After developing the primary prototype and the conventional underwear for operating room staff at Hospital A, their appearances were evaluated, and it was found that the primary prototype was more favorably evaluated. After developing the secondary prototype, their preference for the colors and shapes was surveyed, and it was found that they preferred to wear No.6 blue colors and T/C materials. In conclusion, it is considered that a systematic research need be conducted into the designs of various hospital clothes, whose roles and functions are subdivided, including the underwear for operating room staff developed in this research.

• Proceedings of the Korean Institute of Interior Design Conference
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• 2003.05a
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• pp.65-68
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• 2003

The purpose of this study is examine the color planning in the different type of classroom to establish interior color planning. This study also uses environmental planning and practical use of basic data for color planning to future school facilities. The summary of this study is as followed. The primary school and middle school classrooms as well as the open space classrooms floor color recommended of brown and the primary school wall color is light yellow, middle school wall color is light yellow and brown. The high school classroom color is recommended brown and wall color to light yellow and green system. The recommended floor color of primary school which includes in computer room and language study room, library of the multi-purpose of media room recommended are gray, brown and pink. The recommended wall color in primary school is light gray. The middle school floor color propose gray and light brown and wall recommended color is light brown, gray, ivory with the high school the computer room, language study room and library. The floor color is recommended gray, green and the wall propose blue. Moreover, recognize that importance of color effectiveness in school interior facilities considering with Interior covering material in class room.

• Journal of the Korean Society of Food Science and Nutrition
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• v.30 no.6
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• pp.1147-1151
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• 2001

We investigated stabilities of blue pigment extracted from Gardenia jasminoides at various conditions to check its applicability for beverages. Gardenia blue pigment with maximum absorption at 587 nm was obtained from the reaction of glycine and genipin (aglycone of geniposide). The blue pigment was found to be relatively unstable at acidic pH but very stable at alkaline conditions with half-life values of 102 days and 126 days at PH 9.0 and PH 11.0, respectively. The pigment also showed high thermal stability with half-life value of 55, 18, and 2 days at 50, 70, and 9$0^{\circ}C$, respectively. The addition of inorganic ions, sugars, and amino acids to model beverage containing this blue pigment increased retention rate at room temperature while addition of vitamin C decreased the stability. The sensory evaluation of the model beverage showed that inorganic ions and amino acids increased overall acceptability, indicating that the blue pigments of Gardenia jasminoides can be used as a natural colorant for leverage.

• Journal of Technologic Dentistry
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• v.36 no.1
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• pp.17-23
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• 2014

Purpose: The purpose of this study was to analyze and compare the relative accuracy of digitized stone models of lower full arch, using two different scanning system. Methods: Replica stone models(N=20) were produced from lower arch acrylic model. Twenty digital models were made with the white light and blue LED($Medit^{(R)}$, Korea) scanner. Two-dimensional distance between the landmarks were measured on the Delcam $CopyCAD^{(R)}$(Delcam plc, UK). Independent samples t-test was applied for comparison of the groups. All statistical analyses were performed using the SPSS software package(Statistical Package for Social Sciences for Windows, version 12.0). Results: The absolute disagreement between measurements made directly on the two different scanner-based dental digital models was 0.02~0.04mm, and was not statistically significant(P>0.05). Conclusion: The precision of the blue LED optical scanner was comparable with the digitization device, and relative accuracy was similar. However, there still is room for improvement and further standardization of dental CAD technologies.

• Korean journal of food and cookery science
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• v.9 no.3
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• pp.247-256
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• 1993

This is a study on the types of foodservice system, the menu, the food price, and role of the dietitian through the survey conducted at 106 enterprise located in Seoul industrial foodservice. Which were evenly divided into two groups ; the white color and the blue color. The results are below ; 1. Most institutional foodservice was enterprise under direct management. The meal was usually supp- lied three times in a day for the blue color and one time in a day for the white color. 2. Non-selective menu was set for the two groups. Generally, food was purchased through middleman by a phone, and food was storaged in room temper;iture. 3. Level of the role of dietitian was very low at budget making. A survey of 34 kinds of documentation prepared by foodservice department showed 50 percent participation of the dietitian. Documentation on personnel administration for foodservice, kitchen ser- vice employees and official paper handling was made in greater volume for the blue color than white color. 4. Nutritional education of feeding groups was presented in most cases only for 50 percent of them once a month.

• Analytical Science and Technology
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• v.35 no.4
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• pp.153-160
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• 2022

A green spectrophotometric method for the determination of cyanide has been proposed using, a green reagent, aqueous extract of blue butterfly pea. The test tube was filled with anthocyanin rich extract (pH 6) and cyanide solution. The reaction was kept constant for 10 minutes at room temperature. The reaction mixture changed color from blue to green as the amount of CN-ions increased. The 620 nm peak intensity increased with CN concentration. Therefore, this wavelength was used for all cyanide analyses. The cyanide calibration curve had a linear range of 0.25-1.00, 1.00-4.00, and 4.00-10.00 mg/L, with a satisfactory correlation coefficient of 0.99 and a LOD of 0.57 mg/L. The recovery ranged from 8.33 to 76.94 percent, indicating that this method is inaccurate at low cyanide concentrations. The intra-day and intermediate precision relative deviations were 0.391-0.871 % and 1.112-1.583 %. An H-bond forms between the C-4 group of the B-carbonyl ring and the HCN molecule according to the B3LYP/TZVP calculation. The method is convenient for cyanide concentrations above the LOQ of 1.09 mg/L, cost-effective, and capable of reducing toxic solvents with acceptable precision. The method could also be used to detect total cyanide in biological, environmental, and industrial waste samples.

• Journal of the Korean Vacuum Society
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• v.10 no.2
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• pp.247-251
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• 2001

Photoluminescence(PL) were observed from room temperature to 8K on $Si^+$-implanted silicon-oxide films. The PL intensities are increased from room temperature to 50~80K and decreased below 50K. The blue-shift occurs during the increasing of PL intensity. Also, temperature-dependent PL were measured at peak wavelengths. The first peak is the most sensitive to the measuring temperature. The experimental results are explained by quantum size effect of O rich defects or(and) Si rich defects rather than nanocrystal silicon.

• The Korean Journal of Food And Nutrition
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• v.12 no.1
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• pp.85-90
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• 1999

The characcteristics of anthocyanin pigments from crab apple (Malus prunifolia Wild. Borkh. "red fruit") by ethanol extract were investigated at various condition of light temperature sugar, organic acid me-tal ion and pH. The pigments were stable(over the 60%) on the light irradiation throughout 20 days sto-rage period at room temperature and in the pesenc of Al-foil red blue green and yellow cover were rage period at room temperature and in the pesence of Al-foil red blue green and yellow cover were very stable. The pigments also showed high thermal stbility(over the 67% at 115$^{\circ}C$ 10min) at pH2.5 respectively. The pigments with added organic acid greatly increased thickness of red color. The pig-ments with added metal ions at pH 2.5 such as Na+ K+, Mg2+ Ca2+ and Mn2+ were stable throughout 20 days storage period at $25^{\circ}C$. But Cu2+ addition showed the rapidly degradation of the pigments and Al3+ addition induced the color conversion from red to redish violet. The thickness of the red color of anthocyanin pigments increased increased as the pH decreased. These results indicated that crab apple antho-cyanin pigments might be potental source of natural food colorant. colorant.

• Journal of Families and Better Life
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• v.10 no.1 s.19
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• pp.171-190
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• 1992

The purpose of this study was to set up the objective standards of a space design for preschool children's room. In order to perform the above purpose, this study was organized into three sections. First, literature review to understand the relationship between preschool children's development and children's room, design elements and correlated variables of children's room. Second, survey research to seek a standard of children's room size, necessary furnitures, prefeerred colors and motifs. Third suggestions of objective and concrete alternative plan through the literature review and survey research. The major findings from the survey research were summarized as follows : 1) The mean size of contempory preschool children's room was 3.1 pyong and that of ldeal room was 4.7 pyong. 2) Necessary Furnitures with which more than two-thirds of parents want to furnish were bed, wardrobe, chest of drawers, toy shelves, toy boxes, book cases, chalkboard. Necessary furnitures for different ages were found to vary. For the age 2-5, the funitures for play were major, where as for the age 5-6, the furnitures for study were major. 3) The colors of contemporary preschool children's room were red, yellow, pink, blue, those of parent's favorites were Light colors(pink, skyblue, lemon yellow, Light green, Light purple). The rooms for boy were found with more cold colors, those for girl with more warm colors. 4) The motifs of contemporary preschool children's room were plants, lines, figures from cartoons of fairy tales. Boy's parents prefreerd space science and vehicles, while girl's parents preferred sky scenery and plants for their children's room.