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Green Information Technology (Green IT 2010)

Conferences Académiques - Green Information Technology (Green IT 2010)
Conferences Académiques

Par : Global Science & Technology Forum

Date : 2010

Location : Singapour / Singapore

PDF 132p
Description :

The conference focused on the ways companies are using technology to save energy and reduce costs and how using Environmental Strategy to innovate, create value, and build competitive advantage are part of the solutions for growth.

Mots clés :

Hedging filter, cleantech solutions, Reconfigurable ICs, reusable ICs, reconfigurable electronics, e-waste reduction, power supply ICs, Green IT, Green Frameworks, , Capability Maturity Model, cleantech research, environmental proceedings, green innovation conferences, energy usage, energy optimization.

Mots clés dans les documents :

green ,energy ,power ,consumption ,server ,environmental ,software ,performance ,technology ,figure ,carbon ,inverted ,system ,network ,computing ,signal ,branch ,equipment ,management ,servers

Green is the hot topic these days, and the concept is having an impact on the way people think about business and in particular IT. Adopting a holistic approach to greening IT is our responsibility toward creating a more sustaining environment.

 

Companies around the world are announcing ways to save energy and reduce costs during these times of economic meltdown. They are using Environmental Strategy to innovate, create value, and build competitive advantage.


Proceedings from the Green Information Technology (Green IT 2010) conference.

Abstracts of papers included in the the Green Information Technology (Green IT 2010) conference.

 

1. Hedging Filter for Power Aware Branch Prediction

Yeong-Chang Maa, Department of Computer Science and Engineering, National Taiwan Ocean University, Keelung, Taiwan 202

Mao-Hsu Yen, Department of Computer Science and Engineering, National Taiwan Ocean University, Keelung, Taiwan 202

Shu-Ming Kuo, Department of Computer Science and Engineering, National Taiwan Ocean University, Keelung, Taiwan 202

Guan-Luen Lee, Department of Computer Science and Engineering, National Taiwan Ocean University, Keelung, Taiwan 202


With the ever increasing needs of power aware architecture andcircuit design in recent years, how to reduce the powerconsumption of processors without sacrificing performance hasbecome an important issue. In this paper, we propose a newmethod for low power branch prediction - Hedging Filter, which combines filtering scheme reducing dynamic power consumptionwith hedging prediction mechanism lowering static powerdissipation. We analyze and empirically study this proposed scheme embodied in the Sentry Table - Complementary Branch Prediction combo with respect to critical path delay, performance,hardware overhead and power consumption. Hedging Filter notonly preserves critical path delay and prediction accuracy, but also contributes to the savings of dynamic and static power. From our evaluation, presuming equivalent or superior performance with respect to traditional counterparts, the proposed method reduces branch prediction hardware cost by up to 71% and power saving by up to 79% respectively.


2. Reusable Power Supply ICs for E-Waste Reduction in Mobile Consumer Electronics

Libin George, School of Electrical Engineering and Telecommunications, University of New South Wales, Sydney, Australia

Torsten Lehmann, School of Electrical Engineering and Telecommunications, University of New South Wales, Sydney, Australia

Tara Julia Hamilton, School of Electrical Engineering and Telecommunications, University of New South Wales, Sydney, Australia


The rise in popularity of consumer electronics posesa serious challenge to the environment. The carbon foot print associated with the fabrication of integrated circuits (ICs) used in consumer electronic devices along with the e-wastegenerated with their disposal is significant. Hence a change indesign practices needs to be promoted in order to prevent the unsustainable growth in e-waste in the future. This paper argues that reusable and reconfigurable ICs designed for portable consumer electronic products will greatly reduce thee-waste associated with these devices. The paper identifies the power supply IC as one of the key components of portable electronic devices. Therefore, a reconfigurable power supply IC that can work for a range of input and output conditions will enable its reuse in other devices and applications and thus help towards reducing its impact on the environment. The specifications of power supply ICs that can be reused in anumber of consumer electronics products are explored. The requirements of the reconfigurable power supply IC are formulated based on the specifications of popular consumer electronics such as mobile phones. Possible high-efficiency power supply architectures that can be used to deliver the necessary reconfigurability across a number of devices are then presented.


3. Green IT Benchmarking A Framework and Metrics Approach
Graeme Philipson Connection Research, NSW 2020, Australia

 

Most user organizations are implementing Green IT to someextent. Some have adopted a deliberate policy, others areimplementing it piece meal as their IT systems evolve. But many of them have not properly defined Green IT, which means they cannot properly identify which areas to address. A Green IT framework helps overcome this problem. Such a framework can also provide metrics and measurements toguide its progress and ascertain its success. Measurement is important, because it enables benchmarking and comparisons, by quantifying the degree of implementation of Green IT. User organizations can then be compared to each other, or to themselves over time, to determine the extent and effectiveness oftheir Green IT strategies. A Green IT framework can also enabledifferent industry sectors to be compared.

 

4. Practical Measurement of Typical Disk Performance and Power Consumption using Open Source SPC-1

DongJin Lee, Department of Engineering Science, The University of Auckland, New Zealand

Michael O’Sullivan, Department of Engineering Science, The University of Auckland, New Zealand

Cameron Walker, Department of Engineering Science, The University of Auckland, New Zealand


With the increasing complexity of data storage systems has come the initial development of mathematical modelsfor storage system design. Critical design factors within these models include: 1) total system cost; 2) system performance; and 3) power usage. Therefore, the designs produced by these models rely on accurate information about cost, performance and power consumption of storage system components. While cost of the components are reported accurately by the vendors and retail markets, it is not clear that the vendor-supplied performance (IOps, bandwidth) and power consumption (W) specifications are accurate under “typical” workloads.This paper measures disk performance and power consumption for several data storage devices using “typical” workloads.The workloads are generated using an open source version of the (industry standard) SPC-1 benchmark. This benchmark createsa realistic synthetic workload that aggregates multiple usersutilizing data storage simultaneously. Using our system configuration, we test hard disk devices(HDDs) and solid state devices (SSDs) measuring various diskcharacteristics. We then compare these measurements to identify similarities / differences across the different devices and validate the vendor specifications against our measurements.This work represents a significant contribution to data storage benchmarking resources (both performance and power consumption) as we have embedded the open source SPC-1 benchmark spc1 within an open source workload generator, fio. This integration of spc1 and fio provides an easily available benchmark for researchers developing new storagetechnologies. This benchmark should give a reasonable estimationof performance with the official SPC-1 benchmark for systemsthat do not yet fulfill all the requirements for an official SPC-1benchmark. Our benchmarking solution also provides the abilityto accurately test storage components under “typical” load.Accurately measuring this information is also a vital step inproviding input for mathematical models of storage systems.With accurate information, these mathematical models show promisein alleviating much of the complexity in future storage systems design.

 

5. Rank Your Committement and Turn IT Green: A framework to monitor, measure and control the environmental impact of the IT induatry

Hasini.V.Adhikari, University of Colombo School of Computing, Sri Lanka

Keerthi.K.Kumara, University of Colombo School of Computing, Sri Lanka

Gayan.S.K.Garusinghe, University of Colombo School of Computing, Sri Lanka

Dr Ruvan Weerasinghe, University of Colombo School of Computing, Sri Lanka

Uditha.P.Jayasinghe, University of Colombo School of Computing, Sri Lanka

Dr Shiromi Arunatilake, University of Colombo School of Computing, Sri Lanka


Climate change has become one of the biggest topics of the 21st century. The current status of the planetindicates that the need for greener lifestyle is no longer anoption but a necessity. In current business scenario it is vital to be green for the companies to achieve sustainable growth as well as gain competitive advantage.

 

6. Environmental Enhancement of Strategies

Seppo Puuronen, Department of Computer Science and Information Systems, University of Jyväskylä, Jyväskylä, FINLAND

Erkki Lehtinen, Continuing Educational Center (pensionated), Jyväskylä, FINLAND

Jussi Nukari, School of Business and Services Management, JAMK University of Applied Sciences, Jyväskylä, FINLAND

Dan Asplund, Danova ltd, Jyväskylä, FINLAND

 

Strategies, as business and technology strategy, of a company search aspects that could contribute to the competitive advantage. Nowadays the increasing importance of environmental issues, e.g. environmental laws and standards, environmentally aware customers, the shortage of raw materials, and price of energy, have challenged companies in a totally new manner.

Environmental issues can be considered as threads and reactedonly when it is mandatory. Another approach for a company is to act proactively and turn the threats into opportunities. We have enhanced a technology strategy methodology with environmental issues for this proactive approach. The enhancement consists of several phases, like evaluation of the current environmental profile; formulation of the desired profile; analysis of existing and future technologies and other means that can be used to achieve the goals; and selection and scheduling of and resource allocation for the actions to be taken. Our enhancement emphasizes the need to consider both limitations and realities ofthe means to achieve the goals.

Our approach can be applied either during strategy development to guarantee that environmental issues will be appropriately considered, or with an existing strategy, to check out if environmental aspects are adequately included or whether are view is necessary. This paper presents an overview of the methodology and our experiences in applying it.


7. Non-Linear Thermal Aware Optimization of Data Center Equipment Upgrading

Jayantha Siriwardana, Department of Mechanical Engineering, The University of Melbourne, Melbourne, Australia

Saliya Jayasekara, Department of Mechanical Engineering, The University of Melbourne, Melbourne, Australia

Saman K. Halgamuge, Department of Mechanical Engineering, The University of Melbourne, Melbourne, Australia

 

We develop a technique based on Computational Fluid Dynamics (CFD) for suggesting computing equipment upgrades to a data center that causes least possible efficiency degradation to its cooling system. We use an abstract airflow model of the data center in order to assess the thermal impact ofthe added equipment. In this analysis we use CFD air flow models of data center, where frequent equipment upgrades to the equipment are frequently occurred, to quantify the efficiency to the cooling system. Then, we employ Particle Swarm Optimization (PSO) that is a nonlinear optimization technique to find the optimum upgrade for the given data center layout andfor the given equipment heat dissipation characteristics.
 

8. Energy Consumption in Intelligent Optical Networks

Michael Z. Feng, Centre for Ultra-Broadband Information Networks (CUBIN), University of Melbourne, Victoria 3010, Australia

Kerry Hinton, Centre for Ultra-Broadband Information Networks (CUBIN), University of Melbourne, Victoria 3010, Australia

Robert Ayre, Centre for Ultra-Broadband Information Networks (CUBIN), University of Melbourne, Victoria 3010, Australia

Rodney S. Tucker, Centre for Ultra-Broadband Information Networks (CUBIN), University of Melbourne, Victoria 3010, Australia

 

In recent years, there has been a strong push in the telecommunications industry toward the use of intelligent optical networks (IONs). Generalised Multi-Protocol Label Switching(GMPLS) and Automatically Switched Optical Networks (ASON) have been widely promoted as tools to enable intelligent networking and on-demand provisioning. This added intelligence in the network enables a reduction in operational expenditure (OPEX), by reducing the amount of manual intervention required for network service provisioning and reconfiguration. Moreover, the additional intelligence in the network facilitates an increase in network efficiency, as it allows the network to adapt to changing traffic levels. However, in the past there has been very little focus on the issues of energy consumption when extra intelligence is provided in the network. As the cost of energy increases, (especially if a carbon tax is included), the energy consumption ofthe network is becoming an increasingly important issue. This paper investigates the potential energy savings that could be achieved and the additional energy that would be required when a network without ASON/GMPLS capability is migrated into anautomated and intelligent optical network enabled by the ASON/GMPLS control plane technology.

9. Digital Representation of Analog Signals leading to their Energy-efficient Processing

Yuri Artyukh, Institute of Electronics and Computer Science, Riga, Latvia

Ivars Bilinskis, Institute of Electronics and Computer Science, Riga, Latvia

Salvis Roga, SIA SensoTech, Ventspils, Latvia

Kaspars Sudars, Faculty of Computing, University of Latvia, Riga, Latvia

 

A specific approach to designing chips having power efficiency advantages is considered in this paper for the application area of data acquisition from sensors and preprocessing of them on the basis of Digital Signal Processing(DSP). Attention is drawn to the significant role signal digitizingplays at rational processing of signals. The task that has to be solved at the stage of input signal digitizing is not just obtaining digital signals representing the original continuous input signals in the digital domain. It is shown that to achieve targeted results, in particular, power-efficiency, it is essential to select and use the most suitable method for signal digitizing that leads to complexity reduced processing of compactly presented data. The considered and discussed approach, emphasizing the importance of suitable digital representation of signals, supplements rather than contradicts other currently used methods for increasing power efficiency of chip designs. It does not represent anexception in this sense. The difference is in the methods used fordigitizing making possible complexity reduction of designs and compression of the involved data flows. Advantages and benefits, achievable by using the suggested methods, are demonstrated.

 

10. A Study of Green IT Strategies for Going Green Organisations

Tai Yet Chong, Wee Kim Wee School of Communication and Information, Nanyang Technological University, Singapore

Wei Teng Ng, Wee Kim Wee School of Communication and Information, Nanyang Technological University, Singapore

Qiqi Gu, Wee Kim Wee School of Communication and Information, Nanyang Technological University, Singapore

Wee Keong Ng, Wee Kim Wee School of Communication and Information, Nanyang Technological University, Singapore


Green IT, in the context of going green organisations, is having two elements: innovations to minimize environmental impact by maximizing energy efficient use of IT resources, and practices to create sustainable business environment by maximizing IT role in integration of business model with environmental and social responsibility. Adoptions of Green IT among going green organizations require sound strategies in order to meet the Green IT objectives while support the three crucial elements of organization sustainability – environmental, economic and social. The purpose of this study is to examine Green IT strategies that can be used by going green organisations. This includes theoretical strategies purposed by researchers, currently available approaches and solutions provided by technology companies and IT consulting firms. The study will also suggest a Green IT framework that covers aspects that we think need to be considered when an organisation implements Green IT.

 

11. A Real-Time Update Inverted Index Based on Green Computing Platform

Bai Long, Key Laboratory on High Performance Computing, Anhui Province, School of Computer Science and Technology, University of Science and Technology of China, China

Guang-Zhong Sun, Key Laboratory on High Performance Computing, Anhui
Province, School of Computer Science and Technology, University of Science and Technology of China, China

Jing Yuan, Key Laboratory on High Performance Computing, Anhui Province, School of Computer Science and Technology, University of Science and Technology of China, China

Guoliang Cheng, Key Laboratory on High Performance Computing, Anhui Province, School of Computer Science and Technology, University of Science
and Technology of China, China

 

Real-time property and low power consumption has recently become two hot research topic for enhancing the performance of traditional search engines. This paper presents a real-time updating inverted index structure to improve the efficiency of search engines. This structure consists of main inverted index, auxiliary inverted index and content filtrating index, instead of thesingle model of traditional inverted index. Based on this inverted index structure, we implement a real BBS Search engine. According to the user feedbacks, this search engine has asignificant improvement than the traditional method in terms of the real-time property of search results. To evaluate the efficiency and power consumption of our approach, we conduct extensive experiments on several high performance computing platforms. Experiments results show that the proposed inverted index structure has a 2 orders of magnitude improvement in terms ofupdating time than the traditional inverted index. Furthermore, our method saves 11% power consumption than the competing approach based on the Teraflops high performance green computing platform KD60.

 

12. Green IT principles in Cypriot organizations

Christos Christodoulides, Middlesex University The Burroughs, UK

Chris Sadler, Middlesex University The Burroughs, UK

 

It is not only due to Information and Communication Technologies (ICT) that our planet faces such problems as unstable climate change and other environmental depredations. Nevertheless, ICT does have some impact - through the pollution caused by hardware manufacture and disposal and through lifetime energy consumption. ICT also has a positive role to play viasuch green technologies as cloud computing and digital distribution.

In developed countries, with mature ICT infrastructures, there have been some substantial moves to apply green conservation principles, but in developing countries there is potentially a conflict between ‘catching up’ fast at any environmental cost or trying to implement more environmental methodologies and technologies from the start. Cyprus is a small developing nationwith a steady economy, promising development prospects and alargely well-educated population. As such Cyprus seems like a good place to find out which way this conflict is likely to go.

To explore this proposition, a pilot questionnaire, designed todiscover the organizational awareness and application of a number of appropriate issues (for example, virtualization, e-waste management), was administered to IT personnel in a selection of Cypriot organizations of differing sizes and sectors. As a result a picture has been developed of how green a typical Cypriot organization might be. Subsequently, some guidelines were constructed to assist Cypriot or similar organizations to adopt environmentally-friendlier ICT practices.

 

13. IT Professionals Awareness: Green IT International Comparison Study

Nathalia Devina Widjaja,School of Information Systems, BINUS INTERNATIONAL UNIVERSITY – BINUS BUSINESS SCHOOL, Jakarta, Indonesia

Minsani Mariani,School of Information Systems, BINUS INTERNATIONAL UNIVERSITY – BINUS BUSINESS SCHOOL, Jakarta, Indonesia

Karen Imam,School of Information Systems, BINUS INTERNATIONAL UNIVERSITY – BINUS BUSINESS SCHOOL, Jakarta, Indonesia

 

Global warming and other environmental issues such as energy and resource constraint are becoming the world‘s major concerns and need to be solved. InformationTechnology (IT) is perceived as an enabler to resolve those problems and bring greater efficiency. This concept is known as Green IT which covers energy conservation by IT and energy conservation of IT. It is important to analyse the awareness of IT professionals about Green IT in order to measure whether they are ready to implement a Green IT strategy. Many countries have already applied Green IT initiatives to reduce carbon emissions. Awareness of Green IT has been measured in many countries, except Indonesia, which has committed to reduce its carbon emissions by 26% in 2020. Green IT should be one of the potential enablers to achieve that goal.

This paper provides a preliminary insight into Green IT awareness among Indonesian IT professionals and shows acomparison between attitude and awareness levels of other countries.

Some recommendations will be discussed in order to increase the awareness and reduce the inhibiting factors that influence it. The current findings suggest that although IT professionals in Indonesia have already some concerns about climate change and the power consumption of IT, there is still a lack of implementation and action dimensions.


14. Towards Energy Auto Tuning

Sebastian G¨otz, Technische Universit¨at Dresden, Department of Computer Science, Software Technology Group, D-01062 Dresden

Claas Wilke, Technische Universit¨at Dresden, Department of Computer Science, Software Technology Group, D-01062 Dresden

Matthias Schmidt, Technische Universit¨at Dresden, Department of Computer Science, Software Technology Group, D-01062 Dresden

Sebastian Cech,  Technische Universit¨at Dresden, Department of Computer Science, Software Technology Group, D-01062 Dresden

Uwe Assmann, Technische Universit¨at Dresden, Department of Computer Science, Software Technology Group, D-01062 Dresden

 

Energy efficiency is gaining more and more importance, since well-known ecological reasons lead to risingenergy costs. In consequence, energy consumption is now also an important economical criterion. Energy consumption of single hardware resources has been thoroughly optimized for years. Now software becomes the major target of energy optimization. In this paper we introduce an approach called energy auto tuning(EAT), which optimizes energy efficiency of software systems running on multiple resources. The optimization of more than one resource leads to higher energy savings, because communication costs can be taken into account. E.g., if two components runon the same resource, the communication costs are likely to be less, compared to be running on different resources. The best results can be achieved in heterogeneous environments as different resource characteristics enlarge the synergy effects gainable by our optimization technique. EAT software systemsderive all possible distributions of themselves on a given set of hardware resources and reconfigure themselves to achieve the lowest energy consumption possible at any time. In this paper we describe our software architecture to implement EAT.

 

15. Self-Tuning Energy-Aware Ensemble Model for Server Clusters

Sanket Dangi, International Institute of Information Technology - Bangalore, Bangalore, India

Deepthi Karnam, International Institute of Information Technology - Bangalore, Bangalore, India

Celina Madhavan, International Institute of Information Technology - Bangalore, Bangalore, India

Sudha Mani, International Institute of Information Technology - Bangalore, Bangalore, India

Shrisha Rao, International Institute of Information Technology - Bangalore, Bangalore, India


Clusters of computing servers have become integral components to support various online services and other large computational workloads. With the growing use of cluster systems in web servers, file distribution and database transactions, power conservation and efficiency have been identified as critical issues in the design of server cluster systems. The server cluster electricity costs are of the order of millions annually for larger clusters, and add up to a significant part of the electrical power consumption in all. To reduce power consumption, a master in a server cluster should hibernate the idle servers following the pattern observed from the historical data. This technique saves energy that would have been consumed by the idle servers if not hibernated. We focus on finding patterns from historical data and arriving at decision logic to send a server to hibernation.
 

16. Universal Gravitation: An Ultimate Renewable Energy

Yuh-Huei Shyu, Department of Computer Science and Information Engineering Tamkang University, Taiwan, R.O.C.

 

The universal gravitation is not just a kind of big force existed in the universe. It is a kind of energy. Furthermore, it is a kind of renewable energy. In this paper, we will introduce a method to transfer this intangible energy to tangible liquid’s potential energy. The method used here comes from the new application of Pascal’s principle (or Pascal’s law) existed some four hundred years ago. This result has many implications:

(1) it has shown thatthe universal gravitation is a kind of renewable energy sourceexisted everywhere;

(2) On the surface of the planet, we canartificially generate the renewable energy at any time and at anyplace;

(3) this result has shed a light on solving the earth warming,energy shortage and clean water shortage problems.

 

17. Green ICT: Oxymoron or call to innovation?

Kate Craig-Wood, Department of Computing, University of Surrey University, Guildford GU2 7XH, UK

Paul Krause, Department of Computing, University of Surrey University, Guildford GU2 7XH, UK

Aaron D. Mason,Department of Computing, University of Surrey University, Guildford GU2 7XH, UK


“Green ICT” has often been referred to as anoxymoron. In contrast, we argue here that technological developments have enabled data centres to make significant reductions in their energy usage over the past 3-4 years. In addition, strategic use of ICT can facilitate energy reduction through behavioural change such as travel replacement. The use of ICT to support dematerialisation is more equivocal, however.


18. A Proposed Method Optimizing Energy Usage for Software Process

Ria Candrawati, College of Arts and Sciences (Applied Science), Universiti Utara Malaysia, Malaysia

Nor Laily binti Hashim, College of Arts and Sciences (Applied Science), Universiti Utara Malaysia, Malaysia
Massudi bin Mahmuddin, College of Arts and Sciences (Applied Science), Universiti Utara Malaysia, Malaysia

 

Nowadays there are several ways that calculate the usage ofcarbon produce in plantations or big firms. These calculators contribute to different scopes of productions. However, the computer processes also create the amount of carbon dioxide (CO2) usage. This issue can be overcome with a specific calculator that provides services to estimate the amount of carbon usage. Therefore, this paper proposes on solving the issue of carbon usage for computer processes through the use of CO2 calculator.


19. Using TV White Space for Femtocell Aided Future Mobile Network

Fei Peng, Yue Gao, Queen Mary University of London, School of Electronic Engineering and Computer Science, London, United Kingdom

Yue Chen, Queen Mary University of London, School of Electronic Engineering and Computer Science, London, United Kingdom

Laurie Cuthbert, Queen Mary University of London, School of Electronic Engineering and Computer Science, London, United Kingdom

 

The traditional Femtocell exploits the same frequency band as the Cellular network, thus introducing cross-tier interference. In this paper, a new opened spectrum portion (TV White Space) for Femtocell Aided Future Mobile Network is used to solve the cross-tier interference problem of Femtocell deployment. According to the observation that TV White Spacechannel availability being dependent on locations, a novel Grid based plus Interference Avoidance resource allocation scheme is proposed for Femtocells in the cellular network. A simulator based on a single cell scenario is established to demonstrate the system capacity of Femtocell Aided Future Mobile Network byusing TV White Space. The cases with and without Femtocell are analyzed.
 

Hedging Filter for Power Aware Branch Prediction

Description Organization : With the ever increasing needs of power aware architecture andcircuit design in recent years, how to reduce the powerconsumption of processors without sacrificing performance hasbecome an important issue. In this paper, we propose a newmethod for low power branch prediction - Hedging Filter, which combines filtering scheme reducing dynamic power consumptionwith hedging prediction mechanism lowering static powerdissipation. We analyze and empirically study this proposed scheme embodied in the Sentry Table - Complementary Branch Prediction combo with respect to critical path delay, performance,hardware overhead and power consumption. Hedging Filter notonly preserves critical path delay and prediction accuracy, but also contributes to the savings of dynamic and static power. From our evaluation, presuming equivalent or superior performance with respect to traditional counterparts, the proposed method reduces branch prediction hardware cost by up to 71% and power saving by up to 79% respectively.

Product Type : Conferences Académiques

Auteur : Various

PDF 8p

Langues : Anglais

Reusable Power Supply ICs for E-Waste Reduction in Mobile Consumer Electronics

Description Organization : The rise in popularity of consumer electronics posesa serious challenge to the environment. The carbon foot print associated with the fabrication of integrated circuits (ICs) used in consumer electronic devices along with the e-wastegenerated with their disposal is significant. Hence a change indesign practices needs to be promoted in order to prevent the unsustainable growth in e-waste in the future. This paper argues that reusable and reconfigurable ICs designed for portable consumer electronic products will greatly reduce thee-waste associated with these devices. The paper identifies the power supply IC as one of the key components of portable electronic devices. Therefore, a reconfigurable power supply IC that can work for a range of input and output conditions will enable its reuse in other devices and applications and thus help towards reducing its impact on the environment. The specifications of power supply ICs that can be reused in anumber of consumer electronics products are explored. The requirements of the reconfigurable power supply IC are formulated based on the specifications of popular consumer electronics such as mobile phones. Possible high-efficiency power supply architectures that can be used to deliver the necessary reconfigurability across a number of devices are then presented.

Product Type : Conferences Académiques

Auteur : Various

PDF 8p

Langues : Anglais

Green IT Benchmarking A Framework and Metrics Approach

Description Organization : Most user organizations are implementing Green IT to someextent. Some have adopted a deliberate policy, others areimplementing it piece meal as their IT systems evolve. But many of them have not properly defined Green IT, which means they cannot properly identify which areas to address. A Green IT framework helps overcome this problem. Such a framework can also provide metrics and measurements toguide its progress and ascertain its success. Measurement is important, because it enables benchmarking and comparisons, by quantifying the degree of implementation of Green IT. User organizations can then be compared to each other, or to themselves over time, to determine the extent and effectiveness oftheir Green IT strategies. A Green IT framework can also enabledifferent industry sectors to be compared.

Product Type : Conferences Académiques

Auteur : Graeme Philipson

PDF 7p

Langues : Anglais

Practical Measurement of Typical Disk Performance and Power Consumption using Open Source SPC-1

Description Organization : With the increasing complexity of data storage systems has come the initial development of mathematical modelsfor storage system design. Critical design factors within these models include: 1) total system cost; 2) system performance; and 3) power usage. Therefore, the designs produced by these models rely on accurate information about cost, performance and power consumption of storage system components. While cost of the components are reported accurately by the vendors and retail markets, it is not clear that the vendor-supplied performance (IOps, bandwidth) and power consumption (W) specifications are accurate under “typical” workloads.This paper measures disk performance and power consumption for several data storage devices using “typical” workloads.The workloads are generated using an open source version of the (industry standard) SPC-1 benchmark. This benchmark createsa realistic synthetic workload that aggregates multiple usersutilizing data storage simultaneously. Using our system configuration, we test hard disk devices(HDDs) and solid state devices (SSDs) measuring various diskcharacteristics. We then compare these measurements to identify similarities / differences across the different devices and validate the vendor specifications against our measurements.This work represents a significant contribution to data storage benchmarking resources (both performance and power consumption) as we have embedded the open source SPC-1 benchmark spc1 within an open source workload generator, fio. This integration of spc1 and fio provides an easily available benchmark for researchers developing new storagetechnologies. This benchmark should give a reasonable estimationof performance with the official SPC-1 benchmark for systemsthat do not yet fulfill all the requirements for an official SPC-1benchmark. Our benchmarking solution also provides the abilityto accurately test storage components under “typical” load.Accurately measuring this information is also a vital step inproviding input for mathematical models of storage systems.With accurate information, these mathematical models show promisein alleviating much of the complexity in future storage systems design.

Product Type : Conferences Académiques

Auteur : Various

PDF 8p

Langues : Anglais

Rank Your Committement and Turn IT Green: A framework to monitor, measure and control...

Description Organization : Climate change has become one of the biggest topics of the 21st century. The current status of the planetindicates that the need for greener lifestyle is no longer anoption but a necessity. In current business scenario it is vital to be green for the companies to achieve sustainable growth as well as gain competitive advantage.

Product Type : Conferences Académiques

Auteur : Various

PDF 8p

Langues : Anglais

Environmental Enhancement of Strategies

Description Organization : Strategies, as business and technology strategy, of a company search aspects that could contribute to the competitive advantage. Nowadays the increasing importance of environmental issues, e.g. environmental laws and standards, environmentally aware customers, the shortage of raw materials, and price of energy, have challenged companies in a totally new manner. Environmental issues can be considered as threads and reactedonly when it is mandatory. Another approach for a company is to act proactively and turn the threats into opportunities. We have enhanced a technology strategy methodology with environmental issues for this proactive approach. The enhancement consists of several phases, like evaluation of the current environmental profile; formulation of the desired profile; analysis of existing and future technologies and other means that can be used to achieve the goals; and selection and scheduling of and resource allocation for the actions to be taken. Our enhancement emphasizes the need to consider both limitations and realities ofthe means to achieve the goals. Our approach can be applied either during strategy development to guarantee that environmental issues will be appropriately considered, or with an existing strategy, to check out if environmental aspects are adequately included or whether are view is necessary. This paper presents an overview of the methodology and our experiences in applying it.

Product Type : Conferences Académiques

Auteur : Various

PDF 8p

Langues : Anglais

Non-Linear Thermal Aware Optimization of Data Center Equipment Upgrading

Description Organization : We develop a technique based on Computational Fluid Dynamics (CFD) for suggesting computing equipment upgrades to a data center that causes least possible efficiency degradation to its cooling system. We use an abstract airflow model of the data center in order to assess the thermal impact ofthe added equipment. In this analysis we use CFD air flow models of data center, where frequent equipment upgrades to the equipment are frequently occurred, to quantify the efficiency to the cooling system. Then, we employ Particle Swarm Optimization (PSO) that is a nonlinear optimization technique to find the optimum upgrade for the given data center layout andfor the given equipment heat dissipation characteristics.

Product Type : Conferences Académiques

Auteur : Various

PDF 8p

Langues : Anglais

Energy Consumption in Intelligent Optical Networks

Description Organization : In recent years, there has been a strong push in the telecommunications industry toward the use of intelligent optical networks (IONs). Generalised Multi-Protocol Label Switching(GMPLS) and Automatically Switched Optical Networks (ASON) have been widely promoted as tools to enable intelligent networking and on-demand provisioning. This added intelligence in the network enables a reduction in operational expenditure (OPEX), by reducing the amount of manual intervention required for network service provisioning and reconfiguration. Moreover, the additional intelligence in the network facilitates an increase in network efficiency, as it allows the network to adapt to changing traffic levels. However, in the past there has been very little focus on the issues of energy consumption when extra intelligence is provided in the network. As the cost of energy increases, (especially if a carbon tax is included), the energy consumption ofthe network is becoming an increasingly important issue. This paper investigates the potential energy savings that could be achieved and the additional energy that would be required when a network without ASON/GMPLS capability is migrated into anautomated and intelligent optical network enabled by the ASON/GMPLS control plane technology.

Product Type : Conferences Académiques

Auteur : Various

PDF 7p

Langues : Anglais

Digital Representation of Analog Signals leading to their Energy-efficient Processing

Description Organization : A specific approach to designing chips having power efficiency advantages is considered in this paper for the application area of data acquisition from sensors and preprocessing of them on the basis of Digital Signal Processing(DSP). Attention is drawn to the significant role signal digitizingplays at rational processing of signals. The task that has to be solved at the stage of input signal digitizing is not just obtaining digital signals representing the original continuous input signals in the digital domain. It is shown that to achieve targeted results, in particular, power-efficiency, it is essential to select and use the most suitable method for signal digitizing that leads to complexity reduced processing of compactly presented data. The considered and discussed approach, emphasizing the importance of suitable digital representation of signals, supplements rather than contradicts other currently used methods for increasing power efficiency of chip designs. It does not represent anexception in this sense. The difference is in the methods used fordigitizing making possible complexity reduction of designs and compression of the involved data flows. Advantages and benefits, achievable by using the suggested methods, are demonstrated.

Product Type : Conferences Académiques

Auteur : Various

PDF 8p

Langues : Anglais

A Study of Green IT Strategies for Going Green Organisations

Description Organization : Green IT, in the context of going green organisations, is having two elements: innovations to minimize environmental impact by maximizing energy efficient use of IT resources, and practices to create sustainable business environment by maximizing IT role in integration of business model with environmental and social responsibility. Adoptions of Green IT among going green organizations require sound strategies in order to meet the Green IT objectives while support the three crucial elements of organization sustainability – environmental, economic and social. The purpose of this study is to examine Green IT strategies that can be used by going green organisations. This includes theoretical strategies purposed by researchers, currently available approaches and solutions provided by technology companies and IT consulting firms. The study will also suggest a Green IT framework that covers aspects that we think need to be considered when an organisation implements Green IT.

Product Type : Conferences Académiques

Auteur : Various

PDF 8p

Langues : Anglais

A Real-Time Update Inverted Index Based on Green Computing Platform

Description Organization : Real-time property and low power consumption has recently become two hot research topic for enhancing the performance of traditional search engines. This paper presents a real-time updating inverted index structure to improve the efficiency of search engines. This structure consists of main inverted index, auxiliary inverted index and content filtrating index, instead of thesingle model of traditional inverted index. Based on this inverted index structure, we implement a real BBS Search engine. According to the user feedbacks, this search engine has asignificant improvement than the traditional method in terms of the real-time property of search results. To evaluate the efficiency and power consumption of our approach, we conduct extensive experiments on several high performance computing platforms. Experiments results show that the proposed inverted index structure has a 2 orders of magnitude improvement in terms ofupdating time than the traditional inverted index. Furthermore, our method saves 11% power consumption than the competing approach based on the Teraflops high performance green computing platform KD60.

Product Type : Conferences Académiques

Auteur : Various

PDF 6p

Langues : Anglais

Green IT principles in Cypriot organizations

Description Organization : It is not only due to Information and Communication Technologies (ICT) that our planet faces such problems as unstable climate change and other environmental depredations. Nevertheless, ICT does have some impact - through the pollution caused by hardware manufacture and disposal and through lifetime energy consumption. ICT also has a positive role to play viasuch green technologies as cloud computing and digital distribution. In developed countries, with mature ICT infrastructures, there have been some substantial moves to apply green conservation principles, but in developing countries there is potentially a conflict between ‘catching up’ fast at any environmental cost or trying to implement more environmental methodologies and technologies from the start. Cyprus is a small developing nationwith a steady economy, promising development prospects and alargely well-educated population. As such Cyprus seems like a good place to find out which way this conflict is likely to go. To explore this proposition, a pilot questionnaire, designed todiscover the organizational awareness and application of a number of appropriate issues (for example, virtualization, e-waste management), was administered to IT personnel in a selection of Cypriot organizations of differing sizes and sectors. As a result a picture has been developed of how green a typical Cypriot organization might be. Subsequently, some guidelines were constructed to assist Cypriot or similar organizations to adopt environmentally-friendlier ICT practices.

Product Type : Conferences Académiques

Auteur : Various

PDF 8p

Langues : Anglais

IT Professionals Awareness: Green IT International Comparison Study

Description Organization : Global warming and other environmental issues such as energy and resource constraint are becoming the world‘s major concerns and need to be solved. InformationTechnology (IT) is perceived as an enabler to resolve those problems and bring greater efficiency. This concept is known as Green IT which covers energy conservation by IT and energy conservation of IT. It is important to analyse the awareness of IT professionals about Green IT in order to measure whether they are ready to implement a Green IT strategy. Many countries have already applied Green IT initiatives to reduce carbon emissions. Awareness of Green IT has been measured in many countries, except Indonesia, which has committed to reduce its carbon emissions by 26% in 2020. Green IT should be one of the potential enablers to achieve that goal. This paper provides a preliminary insight into Green IT awareness among Indonesian IT professionals and shows acomparison between attitude and awareness levels of other countries. Some recommendations will be discussed in order to increase the awareness and reduce the inhibiting factors that influence it. The current findings suggest that although IT professionals in Indonesia have already some concerns about climate change and the power consumption of IT, there is still a lack of implementation and action dimensions.

Product Type : Conferences Académiques

Auteur : Various

PDF 8p

Langues : Anglais

Towards Energy Auto Tuning

Description Organization : Energy efficiency is gaining more and more importance, since well-known ecological reasons lead to risingenergy costs. In consequence, energy consumption is now also an important economical criterion. Energy consumption of single hardware resources has been thoroughly optimized for years. Now software becomes the major target of energy optimization. In this paper we introduce an approach called energy auto tuning(EAT), which optimizes energy efficiency of software systems running on multiple resources. The optimization of more than one resource leads to higher energy savings, because communication costs can be taken into account. E.g., if two components runon the same resource, the communication costs are likely to be less, compared to be running on different resources. The best results can be achieved in heterogeneous environments as different resource characteristics enlarge the synergy effects gainable by our optimization technique. EAT software systemsderive all possible distributions of themselves on a given set of hardware resources and reconfigure themselves to achieve the lowest energy consumption possible at any time. In this paper we describe our software architecture to implement EAT.

Product Type : Conferences Académiques

Auteur : Various

PDF 8p

Langues : Anglais

Self-Tuning Energy-Aware Ensemble Model for Server Clusters

Description Organization : Clusters of computing servers have become integral components to support various online services and other large computational workloads. With the growing use of cluster systems in web servers, file distribution and database transactions, power conservation and efficiency have been identified as critical issues in the design of server cluster systems. The server cluster electricity costs are of the order of millions annually for larger clusters, and add up to a significant part of the electrical power consumption in all. To reduce power consumption, a master in a server cluster should hibernate the idle servers following the pattern observed from the historical data. This technique saves energy that would have been consumed by the idle servers if not hibernated. We focus on finding patterns from historical data and arriving at decision logic to send a server to hibernation.

Product Type : Conferences Académiques

Auteur : Various

PDF 7p

Langues : Anglais

Universal Gravitation: An Ultimate Renewable Energy

Description Organization : The universal gravitation is not just a kind of big force existed in the universe. It is a kind of energy. Furthermore, it is a kind of renewable energy. In this paper, we will introduce a method to transfer this intangible energy to tangible liquid’s potential energy. The method used here comes from the new application of Pascal’s principle (or Pascal’s law) existed some four hundred years ago. This result has many implications: (1) it has shown thatthe universal gravitation is a kind of renewable energy sourceexisted everywhere; (2) On the surface of the planet, we canartificially generate the renewable energy at any time and at anyplace; (3) this result has shed a light on solving the earth warming,energy shortage and clean water shortage problems.

Product Type : Conferences Académiques

Auteur : Yuh-Huei Shyu

PDF 4p

Langues : Anglais

Green ICT: Oxymoron or call to innovation?

Description Organization : “Green ICT” has often been referred to as anoxymoron. In contrast, we argue here that technological developments have enabled data centres to make significant reductions in their energy usage over the past 3-4 years. In addition, strategic use of ICT can facilitate energy reduction through behavioural change such as travel replacement. The use of ICT to support dematerialisation is more equivocal, however.

Product Type : Conferences Académiques

Auteur : Various

PDF 6p

Langues : Anglais

A Proposed Method Optimizing Energy Usage for Software Process

Description Organization : Nowadays there are several ways that calculate the usage ofcarbon produce in plantations or big firms. These calculators contribute to different scopes of productions. However, the computer processes also create the amount of carbon dioxide (CO2) usage. This issue can be overcome with a specific calculator that provides services to estimate the amount of carbon usage. Therefore, this paper proposes on solving the issue of carbon usage for computer processes through the use of CO2 calculator.

Product Type : Conferences Académiques

Auteur : Various

PDF 3p

Langues : Anglais

Using TV White Space for Femtocell Aided Future Mobile Network

Description Organization : The traditional Femtocell exploits the same frequency band as the Cellular network, thus introducing cross-tier interference. In this paper, a new opened spectrum portion (TV White Space) for Femtocell Aided Future Mobile Network is used to solve the cross-tier interference problem of Femtocell deployment. According to the observation that TV White Spacechannel availability being dependent on locations, a novel Grid based plus Interference Avoidance resource allocation scheme is proposed for Femtocells in the cellular network. A simulator based on a single cell scenario is established to demonstrate the system capacity of Femtocell Aided Future Mobile Network byusing TV White Space. The cases with and without Femtocell are analyzed.

Product Type : Conferences Académiques

Auteur : Various

PDF 4p

Langues : Anglais

Organisateur : Global Science & Technology Forum

GSTF provides a global intellectual platform for top notch academics and industry professionals to actively interact and share their groundbreaking research achievements. GSTF is dedicated to promoting research and development and offers an inter-disciplinary intellectual platform for leading scientists, researchers, academics and industry professionals across Asia Pacific to actively consult, network and collaborate with their counterparts across the globe.