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Journal of Green EngineeringJournal divested in January 2019, new journal website is: www.jgenng.com

Editor-in-Chief: Michele Albano, ISEP - Instituto Superior de Engenharia do Porto, Portugal

ISSN: 1904-4720 (Print Version),

ISSN: 2245-4586 (Online Version)
Vol: 1   Issue: 1

Published In:   October 2010

Publication Frequency: Quarterly

Search Available Volume and Issue for Journal of Green EngineeringJournal divested in January 2019, new journal website is: www.jgenng.com

Journal Description        Editorial Foreword        Read Full Articles        Editorial Board        Subscription        Indexed

Challenges for Energy Efficiency in Local and Regional Data Centers

G. Koutitas1 and P. Demestichas2

1School of Science and Technology, International Hellenic University, Thessaloniki, Greece;
2Department of Digital Systems, University of Piraeus, Piraeus, Greece;

Abstract: [+]    |    Download File [ 370KB ]

Abstract: This paper investigates challenges for achieving energy efficiency in local and regional datacenters. The challenges are divided into operational and planning categories that must be considered for the green transformation of the datacenter. The study shows that the standardization of the used metrics and guidelines are necessary for the reduction of the carbon emissions related to data centers. The paper presents a review of the available metrics and most modern techniques for energy efficiency. Numerous examples and reviews are discussed that introduce the reader to the most modern green technologies. Finally, the correlation of the energy efficient techniques to the overall carbon emissions is highlighted. It is shown that a green data center not only presents minimum operational expenditures but also produces low carbon emissions that are important to achieve sustainability in modern societies.

Low Carbon Economy Considerations in Designing and Operating Content Delivery Networks for VoD Services

Dragan Boscovic1, Michael Needham1, Faramak Vaki1 and Jin Yang2

1Motorola Applied Research Center, Schaumburg, IL 60196, USA
2Motorola Applied Research Center, Beijing, China

Abstract: [+]    |    Download File [ 202KB ]

Abstract: The advances in information, computer technology and broadband connectivity have eased the way to reach desired content. This is especially true for the Internet TV (IPTV) services such as Video-on-Demand (VoD). This has brought forth many technical challenges regarding the distribution of electronic content, such as how to send large video files, how to deal with the stream load from large numbers of users, and how to transmit the video stream to a global network over a long distance. To address this, Content Delivery Networks (CDN) have been brought into the overall VoD system design. CDNs are based on a system of data centers containing servers and massive storage that places copies from the content library closer to the end user. However, this trend brings some unfavorable conditions in terms of energy usage; worldwide, data centers account for a significant percentage of the total energy consumed by ICT industry. Better energy efficiency of data centers would significantly cut the CO2 emission from ICT operations. As a CDN is an assembly of mutually interconnected data centers the overall efficiency has to factor for efficiency of each CDN geographical node/data center. The aggregate energy efficiency could not be simple multiplication of individual data centers/servers involved but has to introduce corrective factors to account for energy efficiency tradeoffs brought about by specific geographical CDN topology and how effectively the additional resources deployed and energy consumed by them helps improve content access performance of a given CDN design. In this article, we aim to shed additional light onto the technical challenges and recommend possible improvements as related to the energy consumption within a given CDN topology.

Greening Dimension of Intelligent Transport

A. Janota1, M.Dado2 and J. Spalek1

1Department of Control and Information Systems, Faculty of Electrical Engineering, University of Žilina, Univerzitná 8215/1, Žilina 010 26, Slovakia;
2Department of Telecommunications and Multimedia, Faculty of Electrical Engineering, University of Žilina, Univerzitná 8215/1, Žilina 010 26, Slovakia;

Abstract: [+]    |    Download File [ 462KB ]

Abstract: The main purpose of the paper is to show the potential of intelligent transport systems in the process of “transport greening” and possible contributions of information and communication technologies for developing the field of transport in a sustainable way. At first the problem of transport effects on environment is shown in the light of selected statistic indicators. Attention is then paid to road transport seen in the context of the latest EU green initiatives, research and standardization activities as well as the global economic crisis. The authors summarize some of available technical solutions and discuss their expected effects on environment.

Modeling Urban Mobility for E-Governance with Low Energy Complexity

Armando Bazzani, Bruno Giorgini and Sandro Rambaldi

Laboratorio di Fisica della Città, CIG, Department of Physics and INFN, University of Bologna, 40126 Bologna, Italy;

Abstract: [+]    |    Download File [ 218KB ]

Abstract: In this paper we design some characteristics of a possible E-governance system for the urban mobility. In particular we shortly present the complex city features and the background automata gas paradigm for a microscopic modeling. Moreover we show some statistical laws based on long time series of traffic dynamics data, fundamental for the now-casting and the private vehicles mobility control. We study also the crowd dynamics, specifying a stochastic equation founded on a cognitive decisional dynamics, with a threshold changing the evolution from a cooperative behavior to a selfish one, which we identify with the emergence of ‘panic states’. Concluding, essentially our E-governance system is composed of a large data base, of one or more centers that can collect real time microscopic data, elaborate models based on the individual mobility demand, find the optimal self-organized mobility states and diffuse the relative information (best path dynamical map)along the mobility network performing a bidirectional continuous interaction with the citizens. Moreover we underline that the complex interactions via information diffusion, i.e. cognitive based dynamics and mobility governance are low energy consuming

Back to Green

Anand R. Prasad1, Subir Saha2, Prateep Misra 3, Basavaraj Hooli4 and Masahide Murakami1

1NEC Corporation, 1732 Shmonumabe, Nakahara-ku, Kawasaki, Japan;
2IonIdea, Bangalore, India
3Tata Innovation Labs, Tata Consultancy Service, Kolkata, India
4MphasiS Limited, Pune, India

Abstract: [+]    |    Download File [ 251KB ]

Abstract: Eco-friendly, i.e., green is of high importance today not only from the perspective of health of our planet but also from the point of view of business. In this paper we present an overview of worldwide activities in the field of green Information and Communication Technology (ICT). Together with the overview we present technical means to make ICT green and usage of ICT to make a green world.We also capture some of the issues and activities in India regarding green ICT – notably that of Global ICT Standardisation Forum for India (GISFI). This because India continues to grow and her energy needs is putting a huge challenge for everybody.

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