• Journal of Digital Contents Society
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• v.19 no.1
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• pp.1-10
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• 2018

This study is to seek to find the importance of next digital marketing factors by using AHP method and analyze comparison between an advertising expert and a non-advertising expert. In results, the relative importance ranking is as follows; combination (0.26), transformation (0.259), optimization (0.243), and technology (0.238). The relative importance ranking of sub-factors is as follows: artificial intelligence and maching learning (0.086), big data (0.085), and contents curation (0.060). While the relative importance of combination and optimization for an advertising expert is higher than for non-advertising expert, the relative importance of transformation and technology for non-advertising is higher than for an advertising expert. This study provides managerial implication to build digital strategy based on these result.

• Journal of Digital Convergence
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• v.12 no.10
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• pp.291-297
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• 2014

Web service is a standardized software technology which enables interoperability for various applications regardless of operating systems and programing languages through public networks such as the internet and by web service standards. It is distributing computer services that enable a web environment by discovering and providing necessary services. However, there are drawbacks when selecting services for new web environments because current various search methods are based on performance of those services. Even when the performance of the service is improved by selecting web services based on either the service performance or when the new services are discovered, lack of resources causes the web services to get pushed back from the current service list. Therefore, in order to resolve resource allocation issues when selecting web services, this study offers the suitable services for the clients by applying improved services based on scalable information and by applying the information obtained by the clients when requested.

• Journal of Digital Convergence
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• v.11 no.11
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• pp.71-83
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• 2013

In a EFL situation, most Korean students and teachers are exclusively dependent on English textbooks to acquire the cultural factors of English. Therefore, it is necessary to analyze cultural elements in the English Textbooks. The results of the study are as follows: First, although all of the textbooks contain the culture part at the end of each lesson, it is insufficient for students to build a cultural schema. Second, in the analysis of cultural types, three types of cultures are presented in a similar percentage. Third, the culture elements were analyzed based on the 7th national curriculum revised in 2011. The most dominant is the culture regarding arts and literature. Forth, in nationality analysis, universal culture takes up the largest portion. Therefore, it is required more efforts to improve students' knowledge of the American and English culture.

• Journal of the Korean Institute of Telematics and Electronics C
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• v.35C no.10
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• pp.22-29
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• 1998

In this paper, an 10 bit current-mode CMOS A/D converter with a current predictor is designed with a CMOS process to be integrated into a portable image signal processing system. A current predictor let the number of comparator reduce to 70 percent compared with the two step flash architecture. The current magnitude of current reference is reduced to 68 percent with a modular current reference. The designed 10 bit Low-power current-mode CMOS A/D converter with a current predictor is simulated with HSPICE using 0.6$\mu\textrm{m}$ N-well single-poly triple-metal CMOS process parameters. It results in a conversion rate of 10MSamples/s. A power consumption is measured to be 94.4mW at single +5V supply voltage. The 10 bit A/D converter fabricated using the same process occupies the chip area of 1.8mm x 2.4mm.

• Journal of The Korean Association of Information Education
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• v.14 no.1
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• pp.69-77
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• 2010

As the knowledge and information society has emerged, paradigm of school education has moved to improvement of creativity and problem-solving skills of a learner. However, up to the present, ICT education in schools has shown distorted features, which are focusing on the use of application programs, out of its original purpose. This study also allows digital technology to be displayed in analog ways by applying the paper prototyping technique, which can be substituted for the programming phase that elementary school students feel difficulty to handle with. In addition, It enables practical and useful ideas to be designed, constructed and evaluated as a system, based on User Centered Design (UCD), which encourages users actively to participate in the development, rather than focus on developer. To verify the effects of education, we evaluated and analyzed concept models of a learner before and after the application development activity by applying the mental model theory. The framework suggested in this study can be applied to courseware of programming in elementary schools.

• Journal of dental hygiene science
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• v.6 no.2
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• pp.107-111
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• 2006

This study purports to investigate the determinants of intent to leave of dental hygienists working at dental clinics. The sample used in this study consisted of 356 dental hygienists selected from nationwide Korea. The independent variables contain three groups of determinants: 6 structural variables, 2 psychological variables and one environmental variable. Job satisfaction and organizational commitment were included in the model as intervening variables. Data were collected with self-administered questionnaires and analyzed using path analysis. The results of the path analysis indicate that the following variables have significant total effects on the intent to leave of dental hygienists: organizational commitment, supervisory support, job satisfaction, alternative job opportunity, positive affectivity, role conflict and job autonomy. The results imply that the administrators of dental clinics should make an effort to motivate dental hygienists by redesigning their work process, to provide them with more autonomy in doing their work, and to develop their job knowledge and skills through continuous training and education.

• Journal of the Earthquake Engineering Society of Korea
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• v.24 no.5
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• pp.211-217
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• 2020

Earthquake preparedness has become more important with recent increase in the number of earthquakes in Korea, but many existing structures are not prepared for earthquakes. There are various types of liquefaction prevention method that can be applied, such as compaction, replacement, dewatering, and inhibition of shear strain. However, most of the liquefaction prevention methods are applied before construction, and it is important to find optimal methods that can be applied to existing structures and that have few effects on the environment, such as noise, vibration, and changes in underground water level. The purpose of this study is to estimate the correlation between the displacement of a structure and variations of pore water pressure on the ground in accordance with the depth of the sheet file when liquidation occurs. To achieve this, a shaking table test was performed for Joo-Mun-Jin standard sand and an earth pressure, accelerometer, pore water pressure transducer, and LVDT were installed in both the non-liquefiable layer and the liquefiable layer to measure the subsidence and excess pore water pressure in accordance with the time of each embedded depth. Then the results were analyzed. A comparison of the pore water pressure in accordance with Hsp/Hsl was shown to prevent lateral water flow at 1, 0.85 and confirmed that the pore water pressure increased. In addition, the relationship between Hsp/Hsl and subsidence was expressed as a trend line to calculate the expected settlement rate formula for the embedded depth ratio.

• Clean Technology
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• v.14 no.3
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• pp.218-223
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• 2008

Decomposition of reactive organic compound dispersed in microemulsion media by hydroxide ions and proton ions generated during electrolysis was tried and the half-lifes for decomposition were compared. Absorbance of p-nitrophenoxide produced from the decomposition of p-nitrophenylacetate (PNPA) was followed to find the rate of decomposition. The applied voltage, temperature, and the amount of substrate were changed to see the effects on the decomposition rate. The advantages of electrolysis in microemulsion system were the high solubilizing capacity of substrate, easy control of decomposition rate, low operation cost, no need for any addition of chemicals, and no byproducts. The mechanism of decomposition and the application to water purification were discussed.

• The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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• v.20 no.1 s.32
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• pp.1-15
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• 2007

Objectives : RVC has long been used for a useful natural agent ameliorating inflammation related symptoms in the folk medicine recipe. This study was performed to investigate effects of RVC on the inflammation and oxidation in RAW 264.7 cells. Methods : The RVC was extracted with 80% ethanol and sequentially partitioned with solvents in order to increase polarity. With the various fractions, we determined the activities on the inflammation and oxidation in RAW 264.7 cells. Results : 1. Among the various solvent extracts of RVC, the butanol fraction showed the most powerful inhibitory ability against nitric oxide (NO) production in lipopolysaccharide (LPS)-induced RAW 264.7 cells without affecting cell viability. 2. Butanol fraction showed a oxidation inhibition effect by decreasing the DPPH and OH radicals. 3. Butanol fraction exhibited the inhibitory avilities against iNOS and COX-2. 4. Reverse transcriptase polymerase chain reaction (RT-PCR) and Westem blotting analysis revealed that the BuOH fraction provided a primary inhibitor of the iNOS protein and mRNA expression in LPS-induced RAW 264.7 cells. Among the up-regulater molecules of iNOS and COX-2, the BuOh fraction of RVC was shown the inhibitory activity of phoshporylation of c-Jun N-terminal kinase (JNK) 1/2 and threonine protein kinase (AKT), the one of the MAPKs pathway. Conclusion : Thus, the present study suggests that the response of a component of the BuOH fraction to NO generation via iNOS expression provide a important clue to elucidate anti-inflammatory and anti-oxidation mechanism of RVC.

• Korean Journal of Acupuncture
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• v.23 no.3
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• pp.99-109
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• 2006

Objectives : To investigate whether cultivated wild ginseng pharmacopuncture at CV12 and/or ST25 has any immune-enhancing effect in normal rats. Methods : Effects of cultivated wild ginseng pharmacopuncture at CV12 and/or ST25 on blood cell counts, cell composition, cytokine and plasma protein levels were investigated in normal rats. Results : Red blood cell count, hematocrit and hemoglobin levels significantly increased in cultivated wild ginseng pharmacopuncture groups compared with those of the normal group. There was, however, no significant difference in white blood cell (WBC) count and WBC differential count between the normal group and the pharmacopuncture groups. Cultivated wild ginseng pharmacopuncture groups had significantly higher levels of tumor necrosis $factor-{\alpha}\;(TNF-{\alpha})$ and interleukin-6 (IL-6) than the normal group while no significant difference between groups was found in interleukin-$1{\beta}\;(IL-1{\beta})$ level. Total protein and albumin levels were not different between groups. Conclusions : The results suggest that cultivated wild ginseng pharmacopuncture at CV12 and/or ST25 may have no immune-enhancing effect in normal rats.