• Informatization Policy
• /
• v.17 no.3
• /
• pp.74-97
• /
• 2010

This paper investigates factors that have facilitated the rapid diffusion of broadband in South Korea. It finds that the quick spread of broadband access in South Korea is the result of combining the government's strategic ICT policy considering cultural traits, businesses'competitive efforts, and the timely explosion of domestic demand for IT service. This paper also discusses the impact of broadband diffusion on the digital divide. It finds that although there are still regional and age gaps in broadband access, the Korean government and businesses are working to alleviate these problems through various ways from systemic to physical ones. While the deployment of broadband cannot eliminate every issue of the digital divide, broadband access minimizes the digital divide by lowering the barrier to inequitable access to information. This paper concludes with a number of recommendations that address selected policy issues related to the spread of broadband Internet for its successful implementation.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2011.11a
• /
• pp.1532-1533
• /
• 2011

본 연구에서는 SQL를 배우고자 하는 개발자들에게 SQL 문법을 학습할 수 있는 교육용 Tool을 개발한다. 개발자가 예제와 설명을 통하여 SQL 문법을 배우고 ER-Diagram을 보면서 논리적인 DB의 개념을 이용하여 쉽게 학습할 수 있다. 예제는 초급과 중급으로 나누어져 있어 사용자의 수준에 맞는 학습이 선택가능하다. TPC-H 데이터는 DSS 환경에서 사용되는 표준 데이터 모델로 Database Generater를 통해 생성하며 본 연구에서 사용자가 데이터량의 조정이 가능하도록 구성하였다.

• Proceedings of the KHMA Conference
• /
• 2013.05a
• /
• pp.310-310
• /
• 2013

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.20 no.10
• /
• pp.1873-1880
• /
• 2016

Most of the energy used to operate a cellular network is consumed by a base station (BS), and reducing the transmission power of a BS is required for energy-efficient cellular networks. In this paper, a distributed transmit power control (TPC) algorithm is proposed based on the flocking model to improve the energy efficiency of a cellular network. Just as each bird in a flock attempts to match its velocity with the average velocity of adjacent birds, in the proposed algorithm each mobile station (MS) in a cell matches its rate with the average rate of the co-channel MSs in adjacent cells by controlling the transmit power of its serving BS. Simulation results show that the proposed TPC algorithm follows the same convergence properties as the flocking model and also effectively reduces the power consumption at the BSs while maintaining a low outage probability as the inter-cell interference increases. Consequently, it significantly improves the energy efficiency of a cellular network.

• Journal of Nutrition and Health
• /
• v.54 no.1
• /
• pp.116-128
• /
• 2021

Purpose: The extraction conditions for bioactive components from peanut shells, which is a byproduct of peanut processing, were optimized to enhance the total phenolic content (TPC, Y1), total flavonoid content (TFC, Y2), and 2,2-diphenyl-1-picrylhydrazyl radical scavenging activity (RSA, Y3). In addition, this study evaluated the anti-obesity effect of peanut shell extract. Methods: Optimization of ultrasonic-assisted extraction (UAE) was performed using a response surface methodology. The independent variables applied for extraction were time (X1: 5.0-55.0), temperature (X2: 26.0-94.0), and ethanol concentration (X3: 0.0%-99.5%). Quadratic regression models were derived based on the results of 17 experimental sets, and an analysis of the variance was performed to verify its accuracy and precision of the regression equations. Results: When evaluating the effects of independent variables on responses using statistically-based optimization, the independent variable with the most significant effect on the TPC, TFC, and RSA was the ethanol concentration (p = 0.0008). The optimal extraction conditions to satisfy all three responses were 35.8 minutes, 82.7℃, and 96.0% ethanol. Under these conditions, the inhibitory activities of α-glucosidase and pancreatic lipase by the extract were 86.4% and 78.5%, respectively. Conclusion: In this study, UAE showed superior extraction efficiency compared to conventional hot-water extraction in the extraction of polyphenols and bioactive materials. In addition, α-glucosidase and pancreatic lipase inhibitory effects were identified, suggesting that peanut shells can be used as effective antioxidants and anti-obesity agents in functional foods and medicines.

• Proceedings of the Korean Information Science Society Conference
• /
• 2001.04b
• /
• pp.169-171
• /
• 2001

다수 사용자를 지원하는 프로그램에서 쓰레드의 중요성이 증가함에 따라 데이터베이스 관리 시스템의 하부구조인 객체 저장 시스템들도 쓰레드를 이용하도록 확장되고 있다. 기존의 프로세스/쓰레드 모델는 멀티프로세스/단일쓰레드 모델, 단일프로세스/멀티쓰레드 모델, 그리고 멀티프로세스/멀티쓰레드 모델로 분류할 수 있다. 이 중 멀티프로세스/멀티쓰레드 모델은 다른 모델들을 포괄할 수 있는 일반적인 형태의 구조이다. 본 논문에서는 멀티프로세스/단일쓰레드 모델로 개발된 객체 저장 시스템 COSMOS를 멀티프로세스/멀티쓰레드 모델로 확장한 COSMOS/MT를 설계하고 구현한다. 먼저 COSMOS의 트랜잭션 컨텍스트를 분석하여 공유 트랜잭션 컨텍스트와 비공유 트랜잭션 컨텍스트로 분류 후, 각 트랜잭션 컨텍스트의 유지방법을 제안한다. 그리고, 구현한 모델의 유용성을 보이기 위하여 TPC-A 벤치마크에 대해 성능 평가를 수행한다. 실험결과 1000개의 클라이언트를 서비스하는 경우 COSMOS/MT가 COSMOS에 비하여 처리율이 최고 5배까지 향상됨을 보인다. 마지막으로, 멀티프로세스/멀티쓰레드 모델의 성능을 결정하는 중요 요소인 프로세스 당 쓰레드 개수에 따른 성능 변화에 대하여 고찰하고, 실험을 통하여 프로세스당 쓰레드 개수에 따른 시스템의 성능 변화를 보인다.화를 보인다.

• Journal of The Korean Association of Information Education
• /
• v.11 no.2
• /
• pp.185-194
• /
• 2007

With the advent of ubiquitous society, the paradigm of education is also changing. In u-learning in ubiquitous environment, mobile devices such as cellular phone, PDA, PMP, UMPC and TPC will become important learning tools. Particularly if RFID, a key technology in ubiquitous society, is utilized in teaching-learning along with mobile devices, we can expect much more meaningful learning. The present study proposed four types of application of RFID to teaching.learning, which were RFID-card, RFID-book, RFID-label and RFID-test, and examined their possibility and effectiveness. According to the results of this study, technology was insufficient to support the application of RFID-label to teaching-learning and continuous research was required for modeling the application of RFID to teaching-learning.

• The Journal of the Korea Contents Association
• /
• v.14 no.8
• /
• pp.342-364
• /
• 2014

The purpose of this paper is to provide an answer for the following question: What are the major shifts and implications of the unprecedently competitive and rapidly changing media ecosystem in the era of N-screen and OTT services? I've attempted to understand the complex and competitive nexus among media from an historical context by focusing on the displacement vs. complement thesis. The TPC model by Han has been employed for the analysis of the current dynamics of US media industries by triangulating three areas: Technology/industry, public policy and consumer/culture. More specifically, the US media landscape is initially divided into two competitive turfs - the competitors equipped with OTT services and the legacy media industry, and then the traditional media industry was grouped again into PayTV group(telecom service providers with IPTV and mobile TV, cable/Satellite TV networks) and Free (over-the-air) TV networks. Six major shifts were identified by the analysis: power shift in telecom carriers, power shifts in TV industry, Telecom/OTT partnership, time shifts, place shifts, and finally business model shifts.

• Human Ecology Research
• /
• v.51 no.6
• /
• pp.637-647
• /
• 2013

This study aims to develop an educational program for healthy families using Christoph's team performance coaching (TPC) model and evaluate the program by program participant feedback. The educational program is unique in terms of helping the program participants measure the health level of their families, setting goals for the health improvement of their families based upon minimum family performance and seeking ways to achieve these goals. The educational program was designed as 3-hour-course for the convenience of implementing education and recruiting participants. The overall program was based on the characteristics and principles of coaching. Those with a master's degree or above and professional coaches were recruited as instructors. The first workshop for the instructors was conducted in 2 sessions, for 12 hours each (Dec 29-30, 2010 and Feb 12-13, 2011) and the second workshop was conducted Mar 25-26, 2011, for 12 hours. During the workshop for the instructors, the final education program was completed based upon the instructors' impression and evaluation. 8 instructors conducted the educational programs in educational institutions and facilities across the nation. The results of the program evaluated by 419 adults of education participants demonstrated the applicability of Christoph's team performance coaching model to the educational program for healthy family and its effects. If various educational programs with flexible education hours and content according to the needs of subject groups are developed, this educational program can be used as a basic educational program for in-depth education and further service for the improvement of family health.

• Journal of Internet Computing and Services
• /
• v.15 no.4
• /
• pp.1-8
• /
• 2014

In wireless body sensor system(WB-SNSs), unlike existing sensor network system, the size of device is small and amount of battery is considerably limited. And various channel environments can be made by link channel characteristic, human movements, sensor placements, transmission power control(TPC) algorithms and so on. In this paper, therefore we take diverse experiments with totally considerated environments to overcome these restrictions and to manage the energy efficiently and find the value of target received signal strength indicator(RSSI) based on diverse factors such as human movements, sensor placements, and TPC algorithms. And we conduct analysis in terms of energy consumption and packet delivery rate(PDR) based on the experimental results. Through these analysis, we compare and evaluate the efficiency according to setup values of Target RSSI and Target RSSI range suitable for wireless body sensor network system.