• Korean Journal of Social Welfare
• /
• v.61 no.4
• /
• pp.61-84
• /
• 2009

This study is to analyze the nature of mentoring network of single mothers with dependent children and to show the mentoring network effect on mentoring function and empowerment applying social network approach. 439 single mothers with dependent children in Busan and Gyeongsangnam-do have been surveyed about mentoring network properties. The results are 1. The mentoring relationships between single mothers have been shown in various size and relationship characters. The out-degree of Their network is low, the range is narrow, and the tie-strength is weak. 2. When the effect of mentoring network characteristics on mentoring function has been analyzed, in career functions, the range of network and the strength of relationships are represented as significant variables among the mentoring network characteristics, in psychosocial functions, the size of network and the strength of relationships are shown as significant variables, and the inverted-U-shaped relationship according to the size of network has not been revealed. In role modeling function only the size of network is represented as a significant variable. 3. The direct effect of mentoring network of single mothers with dependent children has not been much on empowerment and the career related function among mentoring functions has been revealed as the variable, which affect on empowerment. Based on these results the suggestions and implementations are mentioned in this paper.

• Journal of Families and Better Life
• /
• v.11 no.1
• /
• pp.176-190
• /
• 1993

This study intended to analyze the size and composition of social network and to identify their related variables in urban nuclear families. Data were collected through the questionnaires by wives living in Seoul area. The methods of statistical analysis used in the study were the frequency mean percentile and one-way ANOVA. The findings were as follows; 1) The size of social network in urban nuclear families was 10.0 in average and 2-33 in range. 2) The composition of social network were 45.5% in relatives 20.6% in neighbors. 21.8% in friends. 4,7% in coworkers, 4.1% religious group members 2.1% in associational members. and 1.4% in formal supporters. 3) The birth order of husbands was related to the size of social network. The composition of social network was influenced by SES family life cycle husband's birth order housing type residence duration age education employment religion and familism.

• Proceedings of the IEEK Conference
• /
• 2003.11c
• /
• pp.117-120
• /
• 2003

PON (Passive Optical Network) is an emerging local subscriber access architecture that provides more bandwidth and services to subscriber than DSL (Digital Subscriber Line and HFC (Hybrid-Fiber Coaxial) network. A PON is a point-to-multipoint optical network with no active elements in the signals' path from source to destination. Advantages of using PON for a subscriber access network include large coverage area, reduced fiber deployment, multicast and broadcast capabilities, reduced cost of maintenance (due to devices being passive), and ease of upgrades to higher bit rate or additional wavelengths. PON uses WDM (Wavelength Division Multiplexing) technique that transmits the downstream and upstream data at each different wavelength. For transmitting the CATV (Community Antenna television) service through PON network, we give out additional wavelength. This study shows the available TPS (Triple play service) architecture using CATV overlay EPON (Ethernet PON) architecture and analyzes the effects of EPON-based CATV transmission by measuring the power loss fur each wavelength and the power range of the available analog wavelength and RF.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.2 no.2
• /
• pp.207-214
• /
• 1998

This paper is focused on the desirable schemes of policy on future telecommunication Network. In the scope and method of this study there must invalve following two items: 1) the first item is about the telecommunication Network System. 2) the second item is about the telecommunication network policy in future. The results of study is as follow: 1) an establishment of middle-long range planning for the telecommunication network 2) an establishment of the organization of society for system telecommunication network.

• Journal of the Korean Institute of Navigation
• /
• v.20 no.4
• /
• pp.111-128
• /
• 1996

This paper is focused on the desirable improvement schemes of the local network of information and telecommunication network. In this study, we examined whether polices of information and telecommunication of government have been carried out a desirable programme to meet the public interest, found out several problems in the these policies. Such problems as follows : (1) a system of local information & telecommunication is developing by a Model of Top-Down. In the present management system, an interest of the public of local society about the local telecommunication network is a much lower level, (2) there is no general controlling roll of the local information & telecommunication, (3) there is no service controlling system of local telecommuni-cation, and (4) there is no organic coordinating system of inter-departments in the central government level. In order to resolve these problems, this study suggests a few desirable sxhemes for the local telecommunication : (1) an establishment of middle-long range planning for the integrated future network of info-telecommunication, (2) an organizing of telecommunication network being suitable for the local characteristics toward B-ISDN.

• International Journal of Computer Science & Network Security
• /
• v.24 no.5
• /
• pp.181-190
• /
• 2024

FANET (Flying ad-hoc network) is a self-adjusting wireless network that enables easy to deploy flying nodes, inexpensive, flexible such as UAV in the absence of fixed network infrastructure they communicate amoung themselves. Past few decades FANET is only the emerging networks with it's huge range of next-generation applications.FANET is a sub-set of MANET's(Mobile Ad-hoc Network) and UAV networks are known as FANET.Routing enables the flying nodes to establish routes to radio access infrastructure specifically FANET and among themselves coordinate and collaborate.This paper presents a review on existing proposed communication architecture and routing protocols for FANETS.In addition open issues and challenges are summarized in tabular form with proposed solution.Our goal is to provide a general idea to the researchers about different topics to be addressed in future.

• Journal of the Korean Geographical Society
• /
• v.44 no.2
• /
• pp.187-205
• /
• 2009

Failures on network components of a public transportation system can give rise to the severe degradation of entire system functionality. This paper aims at exploring how potential failures can affect the system flows and reliability of subway network systems in Metropolitan Seoul. To evaluate the range of impacts of disruptions, this research employs a probabilistic approach, network reliability. Network reliability measures the network resiliency and probability of flow loss under a variety of simulated disruptions of critical network components, transfer stations in subway system. By identifying the best and worst scenarios associated with geographical impact, as well as evaluating the criticality of transfer stations, this research presents some insights for protecting current subways systems.

• The Journal of the Institute of Internet, Broadcasting and Communication
• /
• v.19 no.3
• /
• pp.41-51
• /
• 2019

This study explores the structure and the content of WWE Network, an entertainment Over The Top(OTT) produced in the United States. These days, a lot of companies all around the globe provide Internet streaming service OTT, and Netflix could be a great example of that. This study focuses on researching WWE Network of World Wrestling Entertainment(WWE). WWE Network is distinguished in a way that it is based on wrestling which combines sport and entertainment, and it is a suitable subject as it is not of wide range. Through this, it not only studies the structure and the content of WWE Network, but also explores the general market of OTT.

• Journal of IKEEE
• /
• v.11 no.4
• /
• pp.297-306
• /
• 2007

A sensor network is composed of a large number of sensor nodes that are densely deployed in a field. Each sensor performs a sensing task for detection specific events. After detecting this event, location information of the sensor node is very important. Range-based scheme of the proposed approaches typically achieve high accuracy on either node-to-node distances or angles, but this scheme have a drawback because all sensor nodes have the special hardware. On the other hand, range-free scheme provides economic advantage because of no needed hardware even if that leads to coarse positioning accuracy. In this paper, we propose a range-free localization algorithm without range information in wireless sensor networks. This is a range-free approach and uses a small number of anchor nodes and known sensor nodes. This paper develops a localization mechanism using the geometry conjecture (perpendicular bisector of a chord). The conjecture states that a perpendicular bisector of a chord passes through the center of the circle.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2010.11a
• /
• pp.829-832
• /
• 2010

Wireless Sensor Networks have been proposed for several location-dependent applications. For such systems, the cost and limitations of the hardware on sensing nodes prevent the use of range-based localization schemes that depend on absolute point to point distance estimates. Because coarse accuracy is sufficient for most sensor network applications, solutions in range-free localization are being pursued as a cost-effective alternative to more expensive range-based approaches. In this paper, we proposed a modified DV-Hop (range-free localization) algorithm which reduces node's location error and cumulated distance error by minimizing localization error. Simulation results have verified the high estimation accuracy with our approach which outperforms the classical DV-Hop.