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Article
Publication date: 5 April 2011

Christos Grecos and Qi Wang

The interdisciplinary nature of video networking, coupled with various recent developments in standards, proposals and applications, poses great challenges to the research…

Abstract

Purpose

The interdisciplinary nature of video networking, coupled with various recent developments in standards, proposals and applications, poses great challenges to the research and industrial communities working in this area. The main purpose of this paper is to provide a tutorial and survey on recent advances in video networking from an integrated perspective of both video signal processing and networking.

Design/methodology/approach

Detailed technical descriptions and insightful analysis are presented for recent and emerging video coding standards, in particular the H.264 family. The applications of selected video coding standards in emerging wireless networks are then introduced with an emphasis on scalable video streaming in multihomed mobile networks. Both research challenges and potential solutions are discussed along the description, and numerical results through simulations or experiments are provided to reveal the performances of selected coding standards and networking algorithms.

Findings

The tutorial helps to clarify the similarities and differences among the considered standards and networking applications. A number of research trends and challenges are identified, and selected promising solutions are discussed. This practice would provoke further thoughts on the development of this area and open up more research and application opportunities.

Research limitations/implications

Not all the concerned video coding standards are complemented with thorough studies of networking application scenarios.

Practical implications

The discussed video coding standards are either playing or going to play indispensable roles in the video industry; the introduced networking scenarios bring together these standards and various emerging wireless networking paradigms towards innovative application scenarios.

Originality/value

The comprehensive overview and critiques on existing standards and application approaches offer a valuable reference for researchers and system developers in related research and industrial communities.

Details

International Journal of Pervasive Computing and Communications, vol. 7 no. 1
Type: Research Article
ISSN: 1742-7371

Keywords

Content available
Article
Publication date: 5 April 2011

Ismail Khalil

Abstract

Details

International Journal of Pervasive Computing and Communications, vol. 7 no. 1
Type: Research Article
ISSN: 1742-7371

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Article
Publication date: 24 November 2020

Constantin Zopounidis, Alexandros Garefalakis, Christos Lemonakis and Ioannis Passas

The purpose of this paper is to provide to the Board of Directors and CEOs of a firm to be aware of and accountable for the information they provide to the public. As long…

Abstract

Purpose

The purpose of this paper is to provide to the Board of Directors and CEOs of a firm to be aware of and accountable for the information they provide to the public. As long as the quality of the companies’ public information is high, it will be able to retain its investors as well as to obtain new ones more easily.

Design/methodology/approach

This paper introduces a Multi-Criteria Decision Aid (MCDA) tool with the use of the PROMETHEE II method to formulate an alternative aggregate ESG quality approach. We conduct comparisons in a sectorial and regional based perspective during different exam periods before and after the implementation of International Financial Reporting Standards (IFRS), in an attempt to provide a robust framework for corporate disclosure reporting.

Findings

The findings are of particular interest to both scholars and decision-makers, including providers of corporate governance indices and rating agencies. The innovation of this paper lies among others in using the MCDA method with the ESG framework, which proposes a combination of qualitative and quantitative criteria, enabling experienced and/or not experienced analysts to avoid manipulating techniques in business information.

Research limitations/implications

The sample of companies based on the US and Europe companies incorporating only large-sized ones.

Practical implications

Findings are of particular interest to both scholars and decision-makers including providers of corporate governance indices and rating agencies.

Social implications

Better understanding features pay key importance for increasing the “quality” information in firms financial statements, especially after the use of IFRS in reporting standards.

Originality/value

The authors proceed to analysis using a multiple perspective use that is decomposed into the following options: (a) Time-period oriented option, (b) Regional-oriented option and (c) Sectoral-oriented option respectively.

Details

Management Decision, vol. 58 no. 11
Type: Research Article
ISSN: 0025-1747

Keywords

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Article
Publication date: 1 February 1987

Betty A. Dobratz

This article explores the negative attitudes towards the United States that exist in present day Greek society. The anti‐US attitudes in Greece are greater than in other…

Abstract

This article explores the negative attitudes towards the United States that exist in present day Greek society. The anti‐US attitudes in Greece are greater than in other EEC member countries and exist across various social and economic characteristics of the Greek population. Possible reasons for and sources of these attitudes are explored.

Details

International Journal of Sociology and Social Policy, vol. 7 no. 2
Type: Research Article
ISSN: 0144-333X

Keywords

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Article
Publication date: 25 May 2021

Sheshadri Chatterjee, Ranjan Chaudhuri, Alkis Thrassou and Georgia Sakka

The purpose of this study is to empirically examine the impact of Indian firms' intellectual capital on firm performance, as well as the moderating effects of age and…

Abstract

Purpose

The purpose of this study is to empirically examine the impact of Indian firms' intellectual capital on firm performance, as well as the moderating effects of age and gender therein.

Design/methodology/approach

The research initially develops a theoretical model, through extant works and theories, which is subsequently empirically validated using the partial least square structural equation modeling technique with 328 respondents from 12 Indian firms.

Findings

The study concludes that specific dimensions of firms' intellectual capital, including structural capital, human capital and customer capital, positively and significantly impact firm performance, which in turn provides the firm competitive advantages. The study also finds that there are significant moderating effects of age and gender on the relationship between firm's intellectual capital and firm performance.

Research limitations/implications

Further to its evident contribution to scholarly knowledge and its provision of a validated model, which could be used in other emerging and developed markets as well, the research provides valuable practicable directions to firm executives regarding the importance and utilization of the structural, human and customer capital in improving firm performance and strengthening its competitive edge.

Originality/value

The study adds valuable knowledge to the body of literature on intellectual capital, through its explicit empirical findings, as well as through its focus on the significant emerging market of India.

Details

Journal of Intellectual Capital, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1469-1930

Keywords

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Article
Publication date: 7 June 2011

Emmanuel M. Tadjouddine

As agent‐based systems are increasingly used to model real‐life applications such as the internet, electronic markets or disaster management scenarios, it is important to…

Abstract

Purpose

As agent‐based systems are increasingly used to model real‐life applications such as the internet, electronic markets or disaster management scenarios, it is important to study the computational complexity of such usually combinatorial systems with respect to some desirable properties. The purpose of this paper is to consider two computational models: graphical games encoding the interactions between rational and selfish agents; and weighted directed acyclic graphs (DAG) for evaluating derivatives of numerical functions. The author studies the complexity of a certain number of search problems in both models.

Design/methodology/approach

The author's approach is essentially theoretical, studying the problem of verifying game‐theoretic properties for graphical games representing interactions between self‐motivated and rational agents, as well as the problem of searching for an optimal elimination ordering in a weighted DAG for evaluating derivatives of functions represented by computer programs.

Findings

A certain class of games has been identified for which Nash or Bayesian Nash equilibria can be verified in polynomial time; then, it has been shown that verifying a dominant strategy equilibrium is non‐deterministic polynomial (NP)‐complete even for normal form games. Finally, it has been shown that the optimal vertex elimination ordering for weighted DAGs is NP‐complete.

Originality/value

This paper presents a general framework for graphical games. The presented results are novel and illustrate how modeling real‐life scenarios involving intelligent agents can lead to computationally hard problems while showing interesting cases that are tractable.

Details

International Journal of Intelligent Computing and Cybernetics, vol. 4 no. 2
Type: Research Article
ISSN: 1756-378X

Keywords

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