• Title, Summary, Keyword: Network Characteristics

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A Study on the Types of Social Networks of Housewives in Urban Nuclear Families (가족의 사회관계망 유형화 연구 - 도시 핵가족 주부를 중심으로 -)

  • 원효종;옥선화
    • Journal of Korean Home Management Association
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    • v.20 no.4
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    • pp.149-164
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    • 2002
  • The purpose of this study was to identify the types of social networks of urban housewives according to different network composition patterns and to analyze the structural and functional characteristics of identified types. The data used in this study were collected from 589 full-time housewives residing in Taejeon city. The major findings are as follows: 1) The social networks of housewives in urban nuclear families were classified into eight types: the kin network, the non-kin network, the kin-centered network, the friend-centered network, the neighbor-centered network, the associate-centered network, the parallel network, and the decentralized network. 2) The structual characteristics (size, density, homogeneity, duration, proximity, frequency, closeness, direction) varied according to the type. The kin network type and the non-kin network type showed extreme degrees in network characteristics. The parallel network type and the decentralized network type showed an average level of network characteristics. The kin-, friend-, neighbor-, and the associate-centered types showed network characteristics of an intermediate level between the single-category types and the decentralized type. 3) The average levels of function of social network types were different in only two(service support, interference) of the six function areas(emotional support, service support, material support, information support, social companionship support, interference). The average level of service support by the non-kin network type was higher than other types. The average level of interference by the kin-centered network type was higher than other types, and that of the neighbor-centered network type was lower than other types. On the other hand, the total amount of function performance of social network types was different in all function areas. The total amount of social support given by the decentralized network type was greater than the other types. The total amount of interference given by the non-kin network type was smaller than the other types.

Topology-aware Virtual Network Embedding Using Multiple Characteristics

  • Liao, Jianxin;Feng, Min;Li, Tonghong;Wang, Jingyu;Qing, Sude
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.8 no.1
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    • pp.145-164
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    • 2014
  • Network virtualization provides a promising tool to allow multiple heterogeneous virtual networks to run on a shared substrate network simultaneously. A long-standing challenge in network virtualization is the Virtual Network Embedding (VNE) problem: how to embed virtual networks onto specific physical nodes and links in the substrate network effectively. Recent research presents several heuristic algorithms that only consider single topological attribute of networks, which may lead to decreased utilization of resources. In this paper, we introduce six complementary characteristics that reflect different topological attributes, and propose three topology-aware VNE algorithms by leveraging the respective advantages of different characteristics. In addition, a new KS-core decomposition algorithm based on two characteristics is devised to better disentangle the hierarchical topological structure of virtual networks. Due to the overall consideration of topological attributes of substrate and virtual networks by using multiple characteristics, our study better coordinates node and link embedding. Extensive simulations demonstrate that our proposed algorithms improve the long-term average revenue, acceptance ratio, and revenue/cost ratio compared to previous algorithms.

Reliability evaluation of water distribution network considering mechanical characteristics using informational entropy

  • Kashani, Mostafa Ghanbari;Hosseini, Mahmood;Aziminejad, Armin
    • Structural Engineering and Mechanics
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    • v.58 no.1
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    • pp.21-38
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    • 2016
  • Many studies have been carried out to investigate the important factors in calculating the realistic entropy amount of water distribution networks, but none of them have considered both mechanical and hydraulic characteristics of the networks. Also, the entropy difference in various networks has not been calculated exactly. Therefore, this study suggested a modified entropy function to calculate the informational entropy of water distribution networks so that the order of demand nodes and entropy difference among various networks could be calculated by taking into account both mechanical and hydraulic characteristics of the network. This modification was performed through defining a coefficient in the entropy function as the amount of outflow at each node to all dissipated power in the network. Hence, a more realistic method for calculating entropy was presented by considering both mechanical and hydraulic characteristics of network while keeping simplicity. The efficiency of the suggested method was evaluated by calculating the entropy of some sample water networks using the modified function.

Measurement based Traffic Generator for Network Game (트래픽 측정에 기반한 네트워크 게임 트래픽 생성기)

  • Eunsil Hong;Jaecheol Kim;Yanghee Choi
    • Proceedings of the Korean Information Science Society Conference
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    • pp.49-51
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    • 2003
  • Developers of network games have used several prediction techniques for hiding transmission delay to support the real­time requirement of network games. Nowadays many researches that are related with network game are in progress to solve delay problems more radically, such as to propose new routers architecture and transport protocols suitable to characteristics of network game traffic. So for these advanced researches the tasks to grasp the traffic characteristics of a network game are needed. In this paper we aimed to capture the traffic of MMORPG and present the statistical analysis of measured data. The measurement and the analysis were accomplished with the server of 'Lineage' that regarded as the most successful MMORPG. Next, we have implemented a traffic generator that reflects the characteristics of MMORPG and shown that the trace generated by MMORPG traffic generator had identical characteristics with actual traffic using statistical testing method. We expect that this traffic generator can be used in many researches related with a network game.

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The Effect of Team Members' Psychological Characteristics and Knowledge Network Characteristics among Team Members on Team Performance (팀 구성원의 심리적 다양성과 구성원 간 지식네트워크 특성이 팀 성과에 미치는 효과: 학습 분위기의 조절효과를 중심으로)

  • Moon, Yun-Ji;Kang, So-Ra
    • The Journal of Information Systems
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    • v.20 no.1
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    • pp.1-20
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    • 2011
  • This study investigated the factors that facilitate knowledge creation of team with the aspect of knowledge management. We considered two characteristics which are team members' psychological characteristics (achievement needs and conflict emotion) and knowledge network characteristics among team members (internal cohesion and external bridging) and verified the relationship between these characteristics and team performance. Furthermore, we examined whether these characteristics have a different effect on team performance according to the mastery climate. This study performed a survey targeting team members in knowledge based firms and 376 final surveys to be used as a sample in this study. The result showed that team members' psychological characteristics and knowledge network characteristics among Team members have an influence on team performance significantly. In addition, the master climate moderated the relationship between team members' psychological characteristics and team performance.

Empirical Analysis of Relationship between Internet Communication Network Quality Characteristics and Customer Satisfaction using Regression Variable Selection Procedures (회귀변수 선택절차를 이용한 인터넷통신 네트워크 품질특성과 고객만족도의 관계 실증분석)

  • Park, Sung-Min;Park, Young-Joon
    • IE interfaces
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    • v.18 no.3
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    • pp.253-267
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    • 2005
  • Customer satisfaction becomes one of the important managerial concerns associated with corporate competency in current competitive environment for Internet communication service companies. Hence, it is demanding to improve a company's customer satisfaction through the total quality management perspective. In practice, engineers as well as the management hope to find major quality characteristics with Internet communication network that is closely related to customer satisfaction, consequently aiming to the raise of their company's customer satisfaction. This paper presents an empirical relationship analysis between network quality characteristics and customer satisfaction on Internet communication. Methodologically, the relationship analysis framework is based on the regression variable selection procedures. In this framework, it is implemented that; 1) iterative model building; and 2) consistent criteria application to statistical tests for selecting significant variables. A case study shows that; 1) the customer satisfaction on the network connection seems to be more closely related to the network quality characteristics compared with the customer satisfaction on the network speed; and 2) the download disconnection rate has relatively evident relationship with the customer satisfaction on the network connection.

The Characteristics of Network and Innovation in the IT Venture Company: Examining the Roles of Absorptive Capacity

  • Han, Su Jin;Kang, Sora
    • Journal of Information Technology Applications and Management
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    • v.22 no.3
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    • pp.129-141
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    • 2015
  • The purpose of this study is to provide an explanation for the association between the characteristics of a network and the type of innovation by considering the effect of absorptive capacity. To do so, this study examined the moderating effects of absorptive capacity on the characteristics of network-innovation relationship in a technical-driven venture company. In order to obtain a better understanding about consequences caused by interfirm network, information was obtained from 169 Korean IT venture companies. Results confirmed that the network diversity is positively associated with exploration. Our results also suggested that the network strength is positively associated with exploitation. Finally, we found a positive two-way interaction between absorptive capacity and the network diversity-exploration relationship. Then, we discussed implications and directions for future research.

Effects of the Network Characteristics of Healthy Family Support Center on its Performance (건강가정지원센터의 네트워크 특성이 사업성과에 미치는 영향 연구)

  • Choi, Ok Ja;Park, Hyun Sik
    • Korean Family Resource Management Association
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    • v.17 no.4
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    • pp.85-100
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    • 2013
  • The purposes of this study are to explore the effect of the network characteristics of Healthy Family Support Center on its performance, and also to investigate the mediating effect of the organizational properties on the performance. We used the data from 148 healthy family support centers in National Survey in Korea. The analytic sample for this study consists of 102 responses.(response rate=68.9%) Multivariate regression model estimated the effects of the network's structural, interactive and functional characteristics and the interaction between the network's characteristics and organizational properties on the performance The findings of this study demonstrate that healthy family support centers with higher closeness centrality and with better functional characteristics reported more performances. Moreover, Centers that are more independent in organizational properties showed higher performances. However, the findings did not show that the interaction between the network's characteristics and organizational properties mediates on the performance.

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Transmission Characteristics in LonWorks/IP-based Virtual Device Network (II)

  • Park, Gi-Heung;Song, Ki-Won;Kim, Jong-Hwi;Park, Gi-Sang
    • 제어로봇시스템학회:학술대회논문집
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    • pp.121.6-121
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    • 2002
  • Web-based virtual machine/manufacturing system (VMS) utilizes Virtual Device Network (VDN.) VDN inevitably involves the implementation of Distributed Monitoring and Control Networks (DMCN). In general, one needs to integrate device (control) network and IP network to realize DMCN over IP network or internet, which can be viewed as a VDN. In this study, LonWorks networking technology is used for device network and the transmission characteristics of LonWorks/IP-based VDN is investigated. A method to minimize the transmission delay in the LonWorks/IP networks is also suggested.

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Development of an Optimal EEG and Artifact Classifier Using Neural Network Operating Characteristics (신경망 운영특성곡선을 이용한 최적의 뇌파 및 Artifact 분류기 구성)

  • Lee, T.Y.;Ahn, C.B.;Lee, S.H.
    • Proceedings of the KOSOMBE Conference
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    • v.1995 no.05
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    • pp.160-163
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    • 1995
  • An optimal EEG and artifact classifier is proposed using neural network operating characteristics. The neural network operating characteristics are two dimensional parametric representations of the right and false identification probabilities of the network classifier. Since the EEG and EP signals acquired from multi -channel electrodes placed on the head surface are often interfered by other relatively large physiological signals such as electromyogram (EMG) or electroculogram (EOG), the removal of the artifact-affected EEGs is one of the key elements in neuro-functional mapping. Conventionally this task has been carried out by human experts spending lots of examination time. Using the neural-network based classification, human expert's efforts and time can be substantially reduced. From experiments, the neural-network based classification performs as good as human experts: variation of decisions between the neural network and human expert appears even smaller than that between human experts.

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