• KSII Transactions on Internet and Information Systems (TIIS)
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• v.9 no.5
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• pp.1752-1767
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• 2015

As a special type of mobile ad-hoc network, Vehicular Ad-hoc Network (VANET) is considered as an attractive topic by many researchers. In VANETs, vehicles act as routers and clients, which are connected with each other through unreliable wireless links. Due to the dynamic nature of vehicles, developing communication protocols for VANETs is a challenging task. In this paper, we tackle the problem of real-world VANET operations and propose a new dual-level communication scheme through the combination of power and rate control algorithms. Based on the game theoretic approach, the proposed scheme effectively formulates the interactive situation among several vehicles. With a simulation study, it is confirmed that the proposed scheme can achieve better performance than other existing schemes under widely diverse VANET environments.

• Journal of Digital Convergence
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• v.9 no.6
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• pp.267-276
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• 2011

The purpose of this study was to explore the effect of the interactive message expression and consumer characteristic insert IPTV advertising. The results of this study were follow: Firstly, Attention and attitude of interactive message advertising appeared than general TV advertising so that it was high. Second, In case of interactive message advertising, It appeared efficiently than the advertising without the advertisement detail information which is putting the good detail information. Third, In interactive message expression of IPTV advertising, Floating expression strategy appeared efficiently most. Lastly, Adoption of consumer characteristic was revealed that we had an influence on the knowledge level and the information search intention about IPTV. We present theoretical basis which to present interactive message to IPTV supplier is efficient, and the plan which floating expression can make the click intention of the advertising.

• Journal of Information Technology Services
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• v.13 no.4
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• pp.189-203
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• 2014

With the evolution of Internet technologies and the increasing variety of Internet devices, advertisements in various web services have also expanded. Interactive web services often go hand in hand with effective advertisements for a business model. We estimated statistical parameters of the interactive web server for service monitoring and advertisement-effect. In the web pages, we integrated the plugins of social networking services (SNSs) (e.g. Facebook, Twitter) and an advertisement scheme (e.g. Google AdSense) that regards social name-directory contents. Empirical data analysis and statistical results are presented with the implementation of estimations of parameters (e.g. utilization-level and serviceability) and advertisements in a social networking name-directory service (http://ktrip.net or http://한국.net). We found that estimated parameters were applicable to service monitoring of web-server as well as to synthesis of advertisement-effect in our social-web name-directory service.

• Journal of Computing Science and Engineering
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• v.7 no.3
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• pp.177-186
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• 2013

We briefly review the problem of statistical disclosure control under differential privacy model, which entails a formal and ad omnia privacy guarantee separating the utility of the database and the risk due to individual participation. It has born fruitful results over the past ten years, both in theoretical connections to other fields and in practical applications to real-life datasets. Promises of differential privacy help to relieve concerns of privacy loss, which hinder the release of community-valuable data. This paper covers main ideas behind differential privacy, its interactive versus non-interactive settings, perturbation mechanisms, and typical applications found in recent research.

• International Journal of Automotive Technology
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• v.7 no.2
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• pp.129-137
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• 2006

The representative interactive flamelet(RIF) concept has been applied to numerically simulate the combustion processes and pollutant formation in the HSDI diesel engine. In order to account for the spatial inhomogeneity of the scalar dissipation rate, the eulerian particle flamelet model using the multiple flamelets has been employed. The vaporization effects on turbulence-chemistry interaction are included in the present RIF procedure. the results of numerical modeling using the rif concept are compared with experimental data and with numerical results of the widely-used ad-hoc combustion model. Numerical results indicate that the rif approach including the vaporization effect on turbulent spray combustion process successfully predicts the ignition delay characteristics as well as the pollutant formation in the HSDI diesel engines.

• Ocean Science Journal
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• v.41 no.1
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• pp.1-10
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• 2006

Total sea surface temperature (SST) in a coupled GCM is diagnosed by separating the variability into signal variance and noise variance. The signal and the noise is calculated from multi-decadal simulations from the COLA anomaly coupled GCM and the interactive ensemble model by assuming both simulations have a similar signal variance. The interactive ensemble model is a new coupling strategy that is designed to increase signal to noise ratio by using an ensemble of atmospheric realizations coupled to a single ocean model. The procedure for separating the signal and the noise variability presented here does not rely on any ad hoc temporal or spatial filter. Based on these simulations, we find that the signal versus the noise of SST variability in the North Pacific is significantly different from that in the equatorial Pacific. The noise SST variability explains the majority of the total variability in the North Pacific, whereas the signal dominates in the deep tropics. It is also found that the spatial characteristics of the signal and the noise are also distinct in the North Pacific and equatorial Pacific.

• Journal of Digital Convergence
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• v.16 no.5
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• pp.455-461
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• 2018

This study empirically examines the differences in advertising-related memory and product-related memory effects and ad attitudes between art infusion(interactive/ print advertising) and reguratory focus (promotion focus / prevention focus). Two - way MANOVA analysis was used for the factor analysis. The advertising experiment for renowned artists manipulated the 'self portrait' of 'Vincent Van Gogh'. The results of this study are as follows: First, promotion - focused consumers remember interactive advertising more than advertising printed advertisements in advertisements for advertising on publicity. Second, the consumers who focus on preventive focus tend to recall the information related to the product rather than the interactive advertisement.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.14 no.2
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• pp.69-74
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• 2004

Threshold digital signature is very useful for networks that have no infrastructure such as ad hoc network Up to date, research on threshold digital signature is mainly focused on RSA and DSA. Though Schnorr's digital signature scheme is very efficient in terms of both computation and communication. its hard structure using interactive proof prevents conversion to threshold version. This paper proposes an efficient threshold signature. scheme based on the Schnorr's signature. It has a desirable property of scalability and reduces runtime costs by precomputation.

• Proceedings of the Korea Society for Simulation Conference
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• 1998.10a
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• pp.182-186
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• 1998

최근 산업체, 공공기관 등 거의 모든 분야에서 인터넷 기술을 이용한 클라이언트/서버환경으로 시스템을 구축하고 있다. 본 논문에서는 이러한 환경에서 DIS와 ADS의 개념을 이용한 전투 시뮬레이션을 수행하여 기존 모델의 비현실적인 가정과 문제의 난이도로 인한 여러 제약을 해결할 수 있으며 시간 및 시스템의 활용면에서 효율의 증가에 대한 모델을 구현하였다. 본 전투 시뮬레이션 모델은 인터넷 프로토콜의 표준으로 자리하고 있는 TCP/IP를 이용한 것이기 때문에 이동통신을 이용한 무선 데이터는 물론, 인터넷 접속이 가능한 곳이라면 어떠한 환경에서도 수행이 가능하다. 노드에서 시뮬레이션이 종료되면 여기서 발생한 생존 대수, 발사시간 분포 등의 정보는 서버에서 적절한 의사결정을 수행한 후 다른 노드로 전달하게 된다.

• Korean Journal of Community Nutrition
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• v.16 no.6
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• pp.627-635
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• 2011

The prevalence of Atopic Dermatitis (AD), a non-infective chronic inflammatory skin disease, is increasing worldwide. Avoiding the allergen is the basic principle in the treatment of AD. However, when the allergen is food, excessive restriction can lead to nutrition deficiency. The objective of the study was to examine the status of the dietary restriction and compare the caregiver's restriction practice with doctor's recommendation in Korean children with AD. A total of 158 children diagnosed with Atopic Dermatitis were recruited for this study. Information about foods that aggravate AD symptoms and food restriction were collected from the mothers of 158 children aged 6 month-5 year with AD using questionnaires. Food restriction recommendation by doctor was collected through medical chart. McNemar and Margianl homogeneity tests were used to detect a relationship between food restriction recommended by doctor and current practice by mother. There were significant proportion differences of food restriction for each food between by doctor and mother. We found 75.9% of children were avoiding eggs although only 61.4% were recommended for egg restriction by a doctor. Children with restriction of more than 4 kinds of food were 53.2% compared to 13.3% by doctor. Excessive restrictors tended to be younger and diagnosed at younger age. The caregivers of excessive restrictors had trends of "being older" and "having higher income". Avoidance of common foods in children without food allergy could result in malnutrition or impaired growth. Nutrition education is needed for sound practice and nutrition care in children with Atopic Dermatitis as well as interactive communication between caregivers and experts.