The Join/Leave Policy for Video Multicast Group Members

2007 ◽  
Author(s):  
Y. Abdelmalek ◽  
T. Saadawi ◽  
A. Abd El Al ◽  
M. Lee ◽  
J. Sucec ◽  
...  
Keyword(s):  
Multicast Group ◽  
Video Multicast ◽  
Leave Policy ◽  
Group Members

scholarly journals Improving Energy Efficiency of Multimedia Content Dissemination by Adaptive Clustering and D2D Multicast

2019 ◽  
Vol 2019 ◽  
pp. 1-16 ◽  
Author(s):  
Long Yin ◽  
Jinsong Gui ◽  
Zhiwen Zeng
Keyword(s):  
Energy Efficiency ◽  
Energy Efficient ◽  
Multimedia Content ◽  
Game Model ◽  
Multicast Group ◽  
Content Dissemination ◽  
Adaptive Clustering ◽  
Group Members ◽  
Multicast Communications

While achieving desired performance, there exist still many challenges in current cellular networks to support the multimedia content dissemination services. The conventional multimedia transmission schemes tend to serve all multicast group members with the data rate supported by the receiving user with the worst channel condition. The recent work discusses how to provide satisfactory quality of service (QoS) for all receiving users with different quality of experience (QoE) requirements, but the energy efficiency improvement of multimedia content dissemination is not its focus. In this paper, we address it based on adaptive clustering and device-to-device (D2D) multicast and propose an energy-efficient multimedia content dissemination scheme under a consistent QoE constraint. Our scheme extends the recent work with the proposed K-means-based D2D clustering method and the proposed game-based incentive mechanism, which can improve energy efficiency of multimedia content dissemination on the premise of ensuring the desired QoE for most multicast group members. In the proposed scheme, we jointly consider the cellular multicast, intracluster D2D multicast, and intercluster D2D multicast for designing the energy-efficient multimedia content dissemination scheme. In particular, we formulate the energy-efficient multicast transmission problem as a Stackelberg game model, where the macro base station (MBS) is the leader and the candidate D2D cluster heads (DCHs) are the followers. Also, the MBS acts as the buyer who buys the power from the candidate DCHs for intracluster and intercluster D2D multicast communications, and the candidate DCHs act as the sellers who earn reward by helping the MBS with D2D multicast communications. Through analyzing the above game model, we derive the Stackelberg equilibrium as the optimal allocation for cellular multicast power, intracluster D2D multicast power, and intercluster D2D multicast power, which can maximize the MBS’s utility function. Finally, the proposed scheme is verified through the simulation experiments designed in this paper.

An IPv6 Security Multicast System Based on CA Authentication

2014 ◽  
Vol 989-994 ◽  
pp. 4519-4523
Author(s):  
Jian Bing Li ◽  
Xiao Ping Li ◽  
Fan Yang ◽  
Qing Kuan Dong
Keyword(s):  
Key Management ◽  
Access Network ◽  
Security Architecture ◽  
Multicast Group ◽  
Group Key ◽  
Group Management ◽  
Multicast Protocols ◽  
Management Architecture ◽  
Group Members

To deploy network components of a security multicast which is based on the multicast group security architecture and its key management architecture, an IPv6 security multicast system using CA authentication is designed. The multicast group members use CA certificate to access network, while the role of Group Controller/key Server deployed in the network is to establish and manage the group key and negotiate SA with multicast source. The proposed scheme solves the problem of components deployment of multicast system with security, and has strong scalability as well which means various multicast protocols and group management protocols can run on this system.

The power of norms to sway fused group members

2018 ◽  
Vol 41 ◽  
Author(s):  
Winnifred R. Louis ◽  
Craig McGarty ◽  
Emma F. Thomas ◽  
Catherine E. Amiot ◽  
Fathali M. Moghaddam
Keyword(s):  
Evolutionary Anthropology ◽  
Normative Systems ◽  
Violent Extremism ◽  
Identity Fusion ◽  
Group Members

AbstractWhitehouse adapts insights from evolutionary anthropology to interpret extreme self-sacrifice through the concept of identity fusion. The model neglects the role of normative systems in shaping behaviors, especially in relation to violent extremism. In peaceful groups, increasing fusion will actually decrease extremism. Groups collectively appraise threats and opportunities, actively debate action options, and rarely choose violence toward self or others.

Stuttering-Related Podcasts: Audio-Based Self-Help for People Who Stutter

2020 ◽  
Vol 5 (5) ◽  
pp. 1131-1138
Author(s):  
Lauren E. Dignazio ◽  
Megan M. Kenny ◽  
Erik X. Raj ◽  
Kyle D. Pelkey
Keyword(s):  
Support Groups ◽  
Support Group ◽  
Online Survey ◽  
Multiple Choice ◽  
Speech Language Pathologists ◽  
Group Leaders ◽  
Self Help ◽  
Group Members

Purpose It is known that people who stutter (PWS) benefit from self-help experiences, such as attending support groups or conferences. However, limited research has been done to explore the listening of stuttering-related podcasts as a form of self-help for PWS. This study seeks to understand the reasons why PWS listen to stuttering-related podcasts and provide descriptions of their listening experiences. Method Thirty-three PWS who have listened to stuttering-related podcasts were recruited to participate in an online survey that included multiple-choice and open-ended questions. Responses were analyzed and grouped into descriptive themes. Results Participants reported listening to stuttering-related podcasts as a way to gain information and perspective. They also reported experiences that fit themes of empowerment and camaraderie, as a result of listening. Conclusions Stuttering-related podcasts seem to be a positive self-help tool for PWS. Stuttering support group leaders and/or speech-language pathologists may consider introducing their group members or clients who stutter to this type of audio-based self-help experience.

Communication Recovery Groups for Persons with Aphasia: A Replicable Program for Medical and University Settings

2014 ◽  
Vol 24 (3) ◽  
pp. 106-113 ◽  
Author(s):  
Candace Vickers ◽  
Darla Hagge
Keyword(s):  
Medical Setting ◽  
Group Program ◽  
Intake Process ◽  
Student Volunteers ◽  
Group Members ◽  
University Settings ◽  
University Setting ◽  
Recovery Groups

This article describes Communication Recovery Groups (CRG), an aphasia group program that is sponsored by a medical setting and more recently a university setting. CRG's history and approach and its model of service in light of current healthcare challenges are summarized. The article also provides a detailed discussion regarding the logistics of offering conversation groups to persons with aphasia which are sponsored by medical and/or university settings, the intake process for new group members, and the training of student volunteers to help lead conversation groups.

Social attribution, correspondence bias, and the emergence of stereotypes *This research has been completed in partial requirement of a doctoral dissertation of the first author under the supervision of the second author. We wish to thank the members of the social psychology division at the University of Louvain at Louvain-la-Neuve, especially Steve Rocher and Emanuele Castano for their insightful comments on preliminary drafts. This paper has been enriched by feedbacks received from Russell Spears, Roos Vonk, Margit Oswald, and anonymous reviewers. Many thanks to Philippe Kemp and Christophe Remy for their assistance in running the study, and to the students who volunteered to appear on the video. This research has been presented at the Social Cognition workshop of the Kurt Lewin Institute, workshop held at the Free University of Amsterdam in April 1998: we want to thank participants of this workshop and especially Gün Semin for their useful feedback. Completion of this study benefited from a research grant from the Belgian National Fund for Scientific Research to the first author.

1999 ◽  
Vol 58 (4) ◽  
pp. 233-240 ◽  
Author(s):  
Anouk Rogier ◽  
Vincent Yzerbyt
Keyword(s):  
Correspondence Bias ◽  
Social Attribution ◽  
The Social ◽  
Dispositional Attributions ◽  
Kurt Lewin ◽  
Group Members ◽  
Group Target ◽  
The University ◽  
Institute Workshop ◽  
Research Grant

Yzerbyt, Rogier and Fiske (1998) argued that perceivers confronted with a group high in entitativity (i.e., a group perceived as an entity, a tight-knit group) more readily call upon an underlying essence to explain people's behavior than perceivers confronted with an aggregate. Their study showed that group entitativity promoted dispositional attributions for the behavior of group members. Moreover, stereotypes emerged when people faced entitative groups. In this study, we replicate and extend these results by providing further evidence that the process of social attribution is responsible for the emergence of stereotypes. We use the attitude attribution paradigm ( Jones & Harris, 1967 ) and show that the correspondence bias is stronger for an entitative group target than for an aggregate. Besides, several dependent measures indicate that the target's group membership stands as a plausible causal factor to account for members' behavior, a process we call Social Attribution. Implications for current theories of stereotyping are discussed.

Network Autocorrelation of Task Performance via Informal Communication Within a Virtual World

2015 ◽  
Vol 27 (1) ◽  
pp. 33-44 ◽  
Author(s):  
Caleb T. Carr ◽  
Paul Zube
Keyword(s):  
Task Performance ◽  
Virtual World ◽  
World Of Warcraft ◽  
Online Game ◽  
Informal Communication ◽  
Online Groups ◽  
Network Autocorrelation ◽  
Virtual Group ◽  
Group Members ◽  
Individual Achievement

Network autocorrelation occurs when individuals receive assistance from others which regulates their own behavior, and it can be used to explain how group members may improve their task performance. This study explored how network autocorrelation, via informal communication within a virtual group, affected an individual’s task achievement in the online game World of Warcraft. Informal interactions between guild members during a 4-year period were collected and analyzed to assess how informal interactions with other group members affected an individual’s in-game achievement. Findings indicate informal communication from other group members (specifically the experience and helpfulness of the other members) positively predict an individual’s task performance, while tenure with the group negatively predict individual achievement. Findings are discussed with respect to network analysis and influence in online groups.

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