• Journal of Digital Convergence
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• v.11 no.10
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• pp.341-350
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• 2013

Recently, in order to promote their marketing promotion, the entrepeneurs attach importance to many SNS(Social Network Service)and execute it. The representative elements of the SNS service are interactivity, information offering. This study analyzes empirical effects on the SNS Marketing Features in Domesic Enterprise The conclusion of this study shows that the Interactivity has a higher positive effects on Affective Commitment than those on information offering and Information offering has stronger positive effects on calculative commitment than interactivity. Also, these effects enlarge the high use frequency more than the low use frequency. This study also shows that the information offering affect the On-line Word-of-Mouth more positively than the Interactivity. And this study shows that SNS affects the positive effects on the relationship commitment rather than the On-line Word-of-Mouth. Based on the results, the practical implications are offered.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.13 no.3
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• pp.66-77
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• 2014

UTIS(Urban Traffic Information System) directly collects link travel time in urban area by using probe vehicles. Therefore it can estimate more accurate link travel speed compared to other traffic detection systems. However, UTIS includes some missing data caused by the lack of probe vehicles and RSEs on road network, system failures, and other factors. In this study, we suggest a new model, based on k-NN algorithm, for imputing missing data to provide more accurate travel time information. New imputation model is an adaptive k-NN which can flexibly adjust the number of nearest neighbors(NN) depending on the distribution of candidate objects. The evaluation result indicates that the new model successfully imputed missing speed data and significantly reduced the imputation error as compared with other models(ARIMA and etc). We have a plan to use the new imputation model improving traffic information service by applying UTIS Central Traffic Information Center.

• Tuberculosis and Respiratory Diseases
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• v.63 no.1
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• pp.88-93
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• 2007

Wegener's granulomatosis is a disease with an unknown etiology that is characterized by necrotizing granulomatous vasculitis involving the upper and lower respiratory tract and the kidneys. The typical pulmonary findings are bilaterally involved multiple variable sized nodules. We report a case of Wegener's granulomatosis that presented as a single lung mass. A male patient presented with a nasal obstruction, arthralgia, cough, and intermittent dyspnea. The chest radiograph showed a mass, approximately 4.5 cm in diameter, in the right lower lobe. Lung cancer or tuberculosis was initially considered. However, the clinical, laboratory and pathological findings of the mass indicated Wegener's granulomatosis. The patient was administered prednisolone and cyclophosphamide, and improved temporarily. Unfortunately, the immunocompromised patient expired as a result of respiratory failure with pneumonia.

• Research in Community and Public Health Nursing
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• v.18 no.3
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• pp.382-390
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• 2007

Purpose: The purpose of this study was to identify the effects of taekwon aerobic on obesity indices and cardiovascular risk factors in middle-aged obese women. Method: Data were collected from 19 middle-aged obese women who participated in taekwon aerobic exercise. This research adopted one-group pretest-posttest design. Taekwon aerobic was applied 3 times in a week for 12 weeks, and the obesity indices and cardiovascular risk factors were checked before and after the program. Body weight, BMI and % body fat for obesity indices were checked, and total cholesterol, triglyceride, HDL-cholesterol and the ratio of total cholesterol/HDL-cholesterol for cardiovascular risk factors were measured. The data was analyzed by paired t-test using SPSS/win 10.0. Results: There were significant differences in body weight, BMI and % body fat after the taekwon aerobic exercise. There was a significant difference in total cholesterol. However, there were no significant differences in triglyceride, HDL-cholesterol and the ratio of total cholesterol/HDL-cholesterol after the taekwon aerobic exercise. Conclusion: This study showed that taekwon aerobic exercise decreased obesity indices and lowered total cholesterol in the cardiovascular risk factors. The results of this study show that taekwon aerobic exercise is effective in enhancing the health of middle-aged obese women.

• Korean Journal of Construction Engineering and Management
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• v.10 no.5
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• pp.148-157
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• 2009

When an emergency situation happens in buildings, the top priority is to ensure the occupant from danger as soon as possible. Achieving that goal is a multifaceted and difficult task. However, current evacuation systems have many deficiencies in dealing with the emergency in multi-level structures. The shortage of abilities to continuously update database, predict the future situation and provide the information to users with contextual information is the limit in current systems. Thus, it is very crucial to introduce Evacuation Information System (EIS), which is able to respond quickly to the emergency, and transfer the information to both the administrator and the occupant. The main purpose of this paper is to build EIS on the basis of the indoor Geographical Information System (GIS). When the emergency happens, EIS gives the instruction to Emergency Response Model (ERM) at once. ERM carries out the order and calculates the optimal evacuation routes, then sends the result to EIS. At last, EIS transmits evacuation messages to the occupant who implements evacuation plan. This paper highlights the benefits of EIS in two aspects. One is that EIS can update the data continuously to support evacuation strategy-making. The other is that it can transmit evacuation messages to both the administrator and the occupant.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.31 no.11A
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• pp.1085-1091
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• 2006

For an experiment in this paper, designed test bed to secure confidentiality of data and safe transmission that Mobile node exchanges in Mobile network. And, For IPsec use that support basically in MIPv6, modeling and experimented IKEv2 protocol that is used for reliable authentication key management and distribution between End Point. When Mobile node handoff in Mobile network, analyzed effect that authentication key re-exchange and limited bandwidth that happen often get in key exchange. And studied about Performance and latency about authentication setting and exchange process that use multi interface. To conclusion, when Mobile node transmits using IPSec, re-authentication of key confirmed that re-setting by limit of bandwidth that existent Mobile network has can be impossible. According to other result, proposed MN's multi interface is expected to minimise key exchange latency by hand-off when transmit IPSec.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.9 no.1
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• pp.34-42
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• 1998

This paper discribes an analysis for the sleeve monopole antenna with single sleeve. The structure of the proposed antenna is very simple. Therefore, it is very economical in terms of manufacturing and installation which makes it convenient for either portable or mobile use by making an up-and-down type antenna. In the method of analysis, instead of the complex electro- magneticapproach, we used a lumped element equivalent circuit derived from the information about the electrical dimensions and the resonance characteristics of the antenna. An error between a resonant frequency by lumped-element circuit analysis of the proposed antenna and a measured one by an experiment is below 0.9%. It is shown that the theoretical and experiment results are little different.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.11 no.8
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• pp.1420-1427
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• 2000

We described a method to obtain electromagnetic solution and resonant frequencies in dielectric-disc loaded cylindrical cavity resonators. Resonant frequency of dielectric-disc loaded cylindrical cavity resonators is calculated by analyzing the characteristic equation. The characteristic equation is solved by using the ContourPlot graph of Mathematica. As increasing to height of cavity, we compare the calculated resonant frequency with experimental frequency. The calculated results well agree with the experimental ones. The error between them is 0.2% or 1.6% for the case of the top plate is close to or far from concentric dielectric-disc, respectively.

• The Journal of the Korea institute of electronic communication sciences
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• v.8 no.7
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• pp.1083-1091
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• 2013

Internet addiction is a social problem occurring by overuse of internet. And internet addiction is associated with pathologic personality but clinic study about Internet addiction disorder is lack. This study was designed to evaluate the relationship between internet addiction and pattern of internet utilization. We conducted a questionnaire survey on 1,984 middle school students in Gwang -Ju. We questioned about internet addiction, general characteristics, pattern of internet utilization. 11.8% of total number were internet addiction. Sex, religion, duration, time, place, obscene sites, most frequent using service is associated with internet addiction. Family number, occupation of parents, using internet in home, use of parents isn't associated with internet addiction. We show interest in general characteristics and pattern of internet utilization about internet addiction. So we council youths about internet problem in accordance with this study results. Then internet addiction and other psychologic problem are decreased.

• The Journal of the Korea institute of electronic communication sciences
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• v.8 no.9
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• pp.1373-1381
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• 2013

The purpose of this study was to examine the level of job stress and depression, and to find the associated domains of job stress with depression among local public officials. The study subjects consist of 734 local public officials in Seogu, Gwang Ju. A structure self-reported questionnaire was composed of general and job-related characteristics, job stress(KOSS), and depression(CES-D). The use statistical methods were t-test, ANOVA, Pearson's correlation analysis and multiple logistic regression analysis. The total score of job stress was $44.38{\pm}7.96$ and the score of depression was $14.46{\pm}10.19$. The result of multiple logistic regression analysis was shown that the three domains of job stress including job demand, job insecurity and lack of reward were associated with the depression.