• Journal of the Korea Institute of Building Construction
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• v.14 no.6
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• pp.639-645
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• 2014

For the construction materials, concrete, as the most widely used material, is focused on its improvement of performance. Although concrete has many advantages of easiness of handling, economical benefits, and high compressive strength, low tensile strength, brittleness and drying shrinkage are reported as the drawbacks of concrete. Hence, to solve these drawbacks of concrete, many research has conducted especially using fiber-reinforced concrete technology. Especially, HPFRCC which has high volume of fiber reinforcement was suggested as a solution of these drawbacks of normal concrete with increased ductility while it has the possibility of workability loss with fiber clumping which can cause low performance of concrete. Therefore, in this paper, optimized fiber combination with either or both metal and organic fibers is suggested to provide better performance of HPFRCC in tensile strength and ductility. As the results of experiment, better workability was achieved with 1 % of single fiber rather than multiple fibers combinations, espeically, short steel fiber showed the best workability result. Furthermore, in the case of organic fibers which showed higher air content than steel fibers, higher compressive strength was achieved while lower tensile and flexural strength were shown.

• Journal of the Korean Society of Food Science and Nutrition
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• v.41 no.2
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• pp.174-181
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• 2012

This research aimed to examine the isoflavonoid contents, antibacterial activities, and physiological activities of Cheonggukjang made from sword bean (CS). The effects of adding sword bean were compared with those of raw materials (RM), steamed materials (SM), and traditional Cheonggukjang (TC). In the case of the antibacterial activity on Gram-positive bacteria, the result of CS in ethanol extract was the highest in Bacillus cereus, and the result of water extract was the highest in Staphylococcus aureus. However, in the case of Gram-negative bacteria, Salmonella Typhimurium was the highest in all the extraction. Antioxidant activity and total flavonoid contents were present in the order of TC

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.11 no.5
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• pp.189-204
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• 2016

The study is aimed at figuring out the effect of the consumers benefit, attitudes and interest when customers purchase functional food on purchasing intention and product a foundation of competitive power such as a customized product development for a marketing strategy by examining consumers' behavioral patterns. The range of functional food which is a subject of this study is included in the nutraceutical foods, protective foods in addition to biocontrol food. It surveyed about ages of 20 to 60 domestic residents who have taken functional food in order to conduct the study. Data used in this study was collected 353 answers in September 2016, and hierarchical analysis which is a demographic characteristic as control variables was conducted to verify the hypothesis using statistical program SPSS 21.0 The result of this study demonstrates that firstly, psychological pursued benefit secondly, health concern thirdly, health management attitude affects to functional purchasing intention. It is expecting that the result of this study will be used on the basic standards that are grasping and generalizing the needs of customers. In addition, it is also expecting to contribute to improvement of internal and external functional food industry as a functional food material development because it provides empirical customer behavior analysis result.

• Applied Chemistry for Engineering
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• v.24 no.5
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• pp.471-475
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• 2013

This study is about photosensitive microspheres prepared by coating alginate microspheres with gelatin-cinnamic acid conjugate. Firstly, alginate microspheres was prepared in water-in-oil (W/O) emulsion and then they were coated with gelatin- cinnamic acid conjugate. Herein, gelatin-cinnamic acid conjugate is obtained by the amidation between an amine group of gelatin and a carboxy group of cinnamic acid. Cinnamic acid is widely used as a photo-responsive material easy to dimerize and dedimeriz under UV irradiation at ${\lambda}$ = 254 nm and ${\lambda}$ = 365 nm, respectively. As shown in SEM-EDS, alginate was successfully coated with gelatin-ciannmic acid. By determining the absorbance of coated microspheres at 270nm, the amount of cinnamic acid per microspheres was 0.13/1. The SEM photos showed the size of coated microspheres is around $10{\mu}m$. And the degrees of dimerization and dedimerization were calculated to be 49% and 23% respectively. Then the release of FITC-dextran from the coated micrspheres was studied and release the degree was 42%. As a result, the coated microspheres have potential to be used as a photo-responsive drug carrier to delivery drugs.

• Applied Chemistry for Engineering
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• v.29 no.5
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• pp.533-540
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• 2018

Graphene has been reported to be an excellent lubricant additive that reduces friction and wear when coated on the surface of various materials or when dispersed in lubricants as an atomic thin material with the low surface energy. In this study, alkyl functionalized graphene oxide (FGO) nanosheets for oil-based lubricant additives were prepared by using three types of alkyl chloride chemicals (butyl chloride, octyl chloride, and tetradecyl chloride). The chemical and structural properties of the synthesized FGOs were analyzed by Fourier transform infrared (FT-IR), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscope (SEM), and transmission electron microscope (TEM). The synthesized FGOs were dispersed at 0.02 wt% in PAO-0W40 oil and its tribological characteristics were investigated using a high frequency friction/wear tester. The friction coefficient and the wear track width of poly alpha olefin (PAO) oil added with FGO-14 were tested by a ball-on-disk method, and the measured results were reduced by ~5.88 and ~3.8%, respectively compared with those of the conventional PAO oil. Thus, it was found that the wear resistance of PAO oil was improved. In this study, we demonstrated the successful functionalization of GO as well as the improvement of dispersion stability and tribological characteristics of FGOs based on various alkyl chain lengths.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.18 no.2
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• pp.217-226
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• 2018

Since the sides of a vehicle are designed asymmetrically unlike its front or rear, the degree of deformation of the car body greatly differs depending on the site of collision if a broadside collision takes place. When elastic deformation and plastic deformation occur in the car body occur due to a collision, the kinetic energy is absorbed into the body, and the momentum decreases. Generally, an analysis of traffic accidents analyzes the vehicle's behavior after a collision by the law of momentum conservation and corrects the error of the amount of energy absorption due to the deformation of the car body, applying a restitution coefficient. This study interpreted a finite element vehicle model applying the structure of the car body and the material properties of each part with LS-DYNA, analyzed the result and drew the restitution coefficient and the depth of penetration according to the contact area of the vehicle in a broadside collision between an SUV and a passenger car. When the finally calculated restitution coefficient and depth of penetration were applied to the examples of the actual traffic accidents, there was an effect on the improvement of the error in the result. It was found that when the initial input value, drawn using the finite element analysis model, it had a higher reliability of the interpretation than that of the existing analysis techniques.

• Journal of Digital Convergence
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• v.12 no.2
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• pp.483-493
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• 2014

In a modern society where various kinds of cultures coexist, kidult culture seeking something pleasant and interesting in the adult culture has made an appearance affected by pop art. The goal of this study is to help the kidult culture carrying on the feature of pop art to promise a bright future in the consumer market and to help kidult marketing through the expansion of globalization of kidult culture goods. The first study method was to refer to the theoretical research material like theses or academic journals to analyze the feature of pop art and cultural phenomenon. The second one was to analyze media reports, TV programs, movies, and ads currently in issue about kidult cultures in news, media data, and internet materials to feel the kidult cultural phenomenon at the moment. The result of this study shows that, especially, popularity, vividness, and sense of humor and wit among the features of pop art have a great influence on the kidult culture. As a result, Firstly, We can expect a vitalization in the consumer market through qualitative and quantitative improvement of kidult consumer culture. Secondly, We should make an effort to expand kidult consumer culture by developing various kinds of culture goods for each age groups. Thirdly, Domestic companies should open up an adult consumer market with self-developed character products. Fourthly, We should make an aggressive marketing strategy for kidult culture goods in the world market in the flow of Hallyu.

• Journal of Digital Convergence
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• v.12 no.2
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• pp.423-430
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• 2014

Patient safety culture for the general hospital to investigate the perception of radiological technologists, managing of the patient safety provides the Foundation for the safety activities as a basis to develop a program for providing. Patient safety culture for the general hospital to investigate the perception of Radiological technologists, the duration of the survey of the study on June 13, 2012 to June 20, and five general hospitals worked on Radiological technologists workers were material and analyzed the target of 198 (SPSS ver. 19.0). Patient safety activities within the Department, the factors affecting direct care, communication, medical malpractice, hospitals rated, safe for the patient safety culture and the reported accidents, dangerous and caused an accident, most feel that patient safety incident reporting system according to the results of evaluating medical accidents patient safety culture regarding recognition, work appeared in more than 25 years, even the most highly evaluated, the working period of 10 patient safety to 15 years the most highly. Therefore, General Hospital, Director of the patient safety culture improvement of radiation in order to have sufficient staffing, aggressive approach to patient safety issues, and safe working period of relapse prevention of accidents to the radiation as well as giving systematic consideration of mission medical accident reporting system will be active.

• Proceedings of the Korean Society of Crop Science Conference
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• 2017.06a
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• pp.277-277
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• 2017

The research was carried out to investigate a total polyphenol content, antioxidant activity, amino acid and resveratrol content of peanut sprouts (cotyledon, epicotyl, leaf, hypocotyl, root), in different light (white, blue, red, F-red, UV-A, UV-B, UV-C) conditions for 24 hours. Peanut seeds were sown on a $27.5{\times}15.9{\times}13cm$ tray and grown at the $25^{\circ}C$ under the dark condition for 14 days. Total polyphenolic contents of epicotyl and leaf were about 288mg GAE/100g in blue light. The DPPH radical scavenging of cotyledon and hypocotyl were 1.3~1.5 times (63%) and 2 times (40%) compared to control (43%, 19%), respectively. As to ABTS activity, its activity was increased by all LEDs treatment, Especially, the highest ABTS activity of the hypocotyl and leaf was shown as 99.1% in blue light. The essential amino acid content of hypocotyl and leaf was increased 1.9 times in the UV-B, 1.6 times in red, and 1.5 times in F-red, respectively. The non-essential amino acid content was increased by all LEDs treatment in hypocotyl and leaf. The content of resveratrol was increased by 1.3 times in UV-B compared to that of other tissues. Assessing inclusively, this study showed that there was a significantly positive effect between increase of physiological substance activity and LED light treatment, resulting in stably producing peanut sprouts. Therefore, a material treated with LEDs is thought to be useful as a functional food resources.

• Journal of Korean society of Dental Hygiene
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• v.9 no.4
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• pp.559-568
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• 2009

Objectives : In order to manage to reformative tendency of the educational whole with change request of dental hygienics education which is diversificated and professionalized the manufacturing practice of a temporary resin jacket which is educated with from much dental hygiene is become accomplished, so far also the recognition which relates with the manufacturing practice of a temporary resin jacket of dental hygiene students there is not researched. The present research carried out the practice evaluation with the target of students of a dental hygiene department, who finished a manufacturing practice of a temporary resin jacket, analyzed and investigated the material, reported its result, and enforced a research. Methods : This research selected students of 6 dental hygiene departments located in the Daegu Gyeongbuk region, who have manufacturing experience of a temporary resin jacket, by a convenient sampling method, and then a questionnaire was executed by a self-administration method, and a total of 290 copies were statistically treated. The content of the questionnaire are composed of 2 questions on an attitude survey before and after manufacturing practice of a temporary resin jacket, 3 questions on an educator for practice of a temporary resin jacket, 7 questions on recognition of technical skills for manufacturing a temporary resin jacket, 9 questions on the practice content evaluation of manufacturing of a temporary resin jacket and recognition on manufacturing practice of a the temporary resin jacket. Results : 1. The average of recognition on technical skills for manufacturing a temporary resin jacket of a dental hygienist was 3.82 points, the average of evaluation on practice content of manufacturing a temporary resin jacket being 3.75 points, and the average of recognition on the practice of manufacturing a temporary resin jacket was 3.71 points. 2. Currently, as the educator for the practice of manufacturing a temporary resin jacket, dental hygienists were 188 persons(64.8%) and dental technicians was 102 persons(35.2%), and as educators they want in the future, dental hygienists were 97 persons(33.3%) and dental technicians was 193 persons(66.7%). Persons hoping reeducation for manufacturing a temporary resin jacket were 219 persons(85.9%). 3. There was a significant difference in consciousness of students before and after practice of manufacturing a temporary resin jacket(p<.001). 4. There was a significant difference in practice evaluation and practice recognition according to the educational subject(p<.001). 5. There was a significant reverse correlation in the educational subject, practice evaluation and practice recognition(p<0.01). Conclusions : The practice for manufacturing a temporary resin jacket in education of dental hygiene is necessary to improve job performance ability in more various and specialized dental treatment and to solve desire for improvement of professional technical skill ability of students, and accordingly. About study process of the future students observation investigation or student objective interview investigation etc. seeks a problem in the become research lead, the succeeding research which gropes the plan which is the possibility of solving the problem which discovered is thought will be necessary.