scholarly journals A New Resources Provisioning Method Based on QoS Differentiation and VM Resizing in IaaS

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Rongdong Hu ◽  
Guangming Liu ◽  
Jingfei Jiang ◽  
Lixin Wang
Keyword(s):  
Energy Efficiency ◽  
Energy Efficient ◽  
Resource Provisioning ◽  
Application Performance ◽  
Qos Differentiation ◽  
Different Types ◽  
Speed Up ◽  
Google Cluster Trace ◽  
Real Time Application ◽  
Host Resource

In order to improve the host energy efficiency in IaaS, we proposed an adaptive host resource provisioning method, CoST, which is based on QoS differentiation and VM resizing. The control model can adaptively adjust control parameters according to real time application performance, in order to cope with changes in load. CoST takes advantage of the fact that different types of applications have different sensitivity degrees to performance and cost. It places two different types of VMs on the same host and dynamically adjusts their sizes based on the load forecasting and QoS feedback. It not only guarantees the performance defined in SLA, but also keeps the host running in energy-efficient state. Real Google cluster trace and host power data are used to evaluate the proposed method. Experimental results show that CoST can provide performance-sensitive application with a steady QoS and simultaneously speed up the overall processing of performance-tolerant application by 20~66%. The host energy efficiency is significantly improved by 7~23%.

scholarly journals A Review of the Methods of Modeling Multi-Phase Flows within Different Microchannels Shapes and Their Applications

Micromachines ◽  
2021 ◽  
Vol 12 (9) ◽  
pp. 1113
Author(s):  
Awatef Abidi ◽  
Amir Ahmadi ◽  
Mojtaba Enayati ◽  
S. Mohammad Sajadi ◽  
Hooman Yarmand ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Fluid Flow ◽  
Energy Efficient ◽  
Industrial Processes ◽  
Working Fluid ◽  
Design Strategies ◽  
Different Types ◽  
Review Study ◽  
Save Energy ◽  
Multi Phase

In industrial processes, the microtechnology concept refers to the operation of small devices that integrate the elements of operational and reaction units to save energy and space. The advancement of knowledge in the field of microfluidics has resulted in fabricating devices with different applications in micro and nanoscales. Micro- and nano-devices can provide energy-efficient systems due to their high thermal performance. Fluid flow in microchannels and microstructures has been widely considered by researchers in the last two decades. In this paper, a review study on fluid flow within microstructures is performed. The present study aims to present the results obtained in previous studies on this type of system. First, different types of flows in microchannels are examined. The present article will then review previous articles and present a general summary in each section. Then, the multi-phase flows inside the microchannels are discussed, and the flows inside the micropumps, microturbines, and micromixers are evaluated. According to the literature review, it is found that the use of microstructures enhances energy efficiency. The results of previous investigations revealed that the use of nanofluids as a working fluid in microstructures improves energy efficiency. Previous studies have demonstrated special attention to the design aspects of microchannels and micro-devices compared to other design strategies to improve their performance. Finally, general concluding remarks are presented, and the existing challenges in the use of these devices and suggestions for future investigations are presented.

scholarly journals A Simulation Platform for Evaluating RFID and WSN’s Energy Efficiencies

2013 ◽  
Vol 9 (3) ◽  
pp. 184
Author(s):  
Adnan Nasir ◽  
Boon Hee Soong
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Sensor Network ◽  
Mac Protocols ◽  
Simulation Platform ◽  
Application Performance ◽  
Performance Requirements ◽  
Different Types

Advances in the wireless, RFID and sensor technologies has given rise to a plethora of diverse WSN motes that can be used in association with numerous applications. Experimenting with new MAC algorithms and various functionalities on a real sensor network to obtain energy efficiency is both time consuming and expensive especially when these different mote platforms are deployed in one application. Generally Simulators are used to approximate the performance of MAC protocols. Out of the numerous simulators available, none can simulate the energy efficiencies given different types of motes and environments in one application. Hence, the need of a simulation platform for a mix deployment of different types of WSNs and RFIDs is felt to access application performance requirements while curtailing energy consumption to enhance application lifetime. In this paper, we presents an extension of our effort EnergySim [1], which is a simulation platform developed dedicatedly for evaluating energy efficiencies. In this paper we have discussed the simulation modes, methodology and architecture of our proposed simulator with some future extensions presented at the end of the paper.

scholarly journals G2LC: Resources Autoscaling for Real Time Bioinformatics Applications in IaaS

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Rongdong Hu ◽  
Guangming Liu ◽  
Jingfei Jiang ◽  
Lixin Wang
Keyword(s):  
Cloud Computing ◽  
Real Time ◽  
Resource Utilization ◽  
Scientific Discovery ◽  
Resource Provisioning ◽  
Experimental Results ◽  
Real Sequence ◽  
Application Performance ◽  
Data Volume ◽  
Speed Up

Cloud computing has started to change the way how bioinformatics research is being carried out. Researchers who have taken advantage of this technology can process larger amounts of data and speed up scientific discovery. The variability in data volume results in variable computing requirements. Therefore, bioinformatics researchers are pursuing more reliable and efficient methods for conducting sequencing analyses. This paper proposes an automated resource provisioning method, G2LC, for bioinformatics applications in IaaS. It enables application to output the results in a real time manner. Its main purpose is to guarantee applications performance, while improving resource utilization. Real sequence searching data of BLAST is used to evaluate the effectiveness of G2LC. Experimental results show that G2LC guarantees the application performance, while resource is saved up to 20.14%.

scholarly journals The “rebound effect” of energy efficient actions to be performed as part of a major renovation of apartment buildings

2021 ◽  
pp. 44-48
Author(s):  
Valeriy Mishchenko ◽  
Elena Gorbaneva ◽  
Elena Ovchinnikova
Keyword(s):  
Energy Efficiency ◽  
Energy Efficient ◽  
Rebound Effect ◽  
Environmental Safety ◽  
Assessment Method ◽  
Energy Efficiency Improvement ◽  
Different Types ◽  
New Energy ◽  
Individual Household ◽  
The Impact

Environmental safety and the rational use of natural resources are among pressing present-day problems. Energy efficiency improvement is an important constituent of energy policies in many countries. This article examines the impact of the “rebound effect” on improving the energy efficiency of environmental safety programs implement-d at federal and municipal levels. There is still no consensus on how to take the “rebound effect” into account and whether it should be considered at all. Paradoxically, the “rebound effect” is the unintended side effect of energy efficiency activities. In this paper, different types of this effect are considered. The “direct assessment” method, based on the non-linear relationship between energy consumption and efficiency, is used to assess the “rebound effect” produced on individual household appliances. The factors hindering the implementation of energy efficiency activities are also identified. Having analyzed the impact of the effect on different sectors of economy, we can conclude that the most pronounced “rebound effect” is observed in the housing sector. Consequently, if we consider a major energy efficient renovation, we have to take account of the “rebound effect” caused by new energy saving activities.

scholarly journals Exploiting Read/Write Asymmetry to Achieve Opportunistic SRAM Voltage Switching in Dual-Supply Near-Threshold Processors

2018 ◽  
Vol 8 (3) ◽  
pp. 28
Author(s):  
Yunfei Gu ◽  
Dengxue Yan ◽  
Vaibhav Verma ◽  
Pai Wang ◽  
Mircea Stan ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Energy Efficient ◽  
Switching Scheme ◽  
Promising Technique ◽  
Improve Energy Efficiency ◽  
Wide Range ◽  
Speed Up ◽  
On Chip ◽  
Voltage Switching ◽  
Near Threshold

Energy-efficient microprocessors are essential for a wide range of applications. While near-threshold computing is a promising technique to improve energy efficiency, optimal supply demands from logic core and on-chip memory are conflicting. In this paper, we perform static reliability analysis of 6T SRAM and discover the variance among different sizing configuration and asymmetric minimum voltage requirements between read and write operations. We leverage this asymmetric property i n near-threshold processors equipped with voltage boosting capability by proposing an opportunistic dual-supply switching scheme with a write aggregation buffer. Our results show that proposed technique improves energy efficiency by more than 21.45% with approximate 10.19% performance speed-up.

scholarly journals Exploiting Read/Write Asymmetry to Achieve Opportunistic SRAM Voltage Switching in Dual-Supply Near-Threshold Processors

2018 ◽  
Author(s):  
Yunfei Gu ◽  
Dengxue Yan ◽  
Vaibhav Verma ◽  
Pai Wang ◽  
Mircea Stan ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Energy Efficient ◽  
Switching Scheme ◽  
Promising Technique ◽  
Improve Energy Efficiency ◽  
Wide Range ◽  
Speed Up ◽  
On Chip ◽  
Voltage Switching ◽  
Near Threshold

Energy-efficient microprocessors are essential for a wide range of applications. While near-threshold computing is a promising technique to improve energy efficiency, optimal supply demands from logic core and on-chip memory are conflicting. In this paper, we perform static reliability analysis of 6T SRAM and discover the variance among different sizing configuration and asymmetric minimum voltage requirements between read and write operations. We leverage this asymmetric property in near-threshold processors equipped with voltage boosting capability by proposing an opportunistic dual-supply switching scheme with a write aggregation buffer. Our results show that proposed technique improves energy efficiency by more than 21.45% with approximate 10.19% performance speed-up.

scholarly journals Energy-Efficient Asynchronous QoS MAC Protocol for Wireless Sensor Networks

2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Sohail Sarang ◽  
Goran M. Stojanović ◽  
Stevan Stankovski ◽  
Željen Trpovski ◽  
Micheal Drieberg
Keyword(s):  
Energy Efficiency ◽  
Energy Efficient ◽  
Mac Protocol ◽  
Mac Protocols ◽  
Wireless Sensor ◽  
Delivery Ratio ◽  
Data Packets ◽  
Packet Delivery ◽  
Different Types ◽  
Network Operation

In recent years, wireless sensor networks (WSNs) have gained significant attention in both industry and academia. In WSNs, each sensor node is normally equipped with a small-size battery with finite capacity. Hence, energy-efficient communication is considered a key factor for the extension of network lifetime. Formerly, a large number of medium access control (MAC) protocols have been proposed to improve energy efficiency to prolong the network lifetime. There are applications that generate different types of data packets and require quality of service (QoS) without any disruption in network operation. Therefore, these applications need an energy-efficient QoS MAC protocol that can support QoS by considering energy efficiency as the primary goal to avoid any failure in the network. This article proposes an energy-efficient asynchronous QoS (AQSen) MAC protocol, called AQSen-MAC. The AQSen-MAC considers different types of data packets and uses two novel techniques: self-adaptation and scheduling to enhance energy efficiency, packet delivery ratio, and network throughput. Furthermore, in the protocol, the receiver adjusts its duty cycle according to the remaining energy to prolong the network operation. Finally, the performance of the AQSen-MAC protocol has been evaluated through detailed simulation using Castalia and compared with MPQ-MAC, PMME-MAC, and QAEE-MAC protocols. The simulation results indicate that the AQSen-MAC protocol significantly reduces the energy consumption at the receiver of up to 13.4%, consumption per bit of up to 3% and improves the packet delivery ratio and network throughput of up to 12% in the network.

scholarly journals Exploiting Read/Write Asymmetry to Achieve Opportunistic SRAM Voltage Switching in Dual-Supply Near-Threshold Processors

2018 ◽  
Author(s):  
Yunfei Gu ◽  
Dengxue Yan ◽  
Vaibhav Verma ◽  
Pai Wang ◽  
Mircea R. Stan ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Energy Efficient ◽  
Switching Scheme ◽  
Promising Technique ◽  
Improve Energy Efficiency ◽  
Wide Range ◽  
Speed Up ◽  
On Chip ◽  
Voltage Switching ◽  
Near Threshold

Energy-efficient microprocessors are essential for a wide range of applications. While near-threshold computing is a promising technique to improve energy efficiency, optimal supply demands from logic core and on-chip memory are conflicting. In this paper, we perform static reliability analysis of 6T SRAM and discover the variance among different sizing configuration and asymmetric minimum voltage requirements between read and write operations. We leverage this asymmetric property in near-threshold processors equipped with voltage boosting capability by proposing an opportunistic dual-supply switching scheme with a write aggregation buffer. Our results show that proposed technique improves energy efficiency by more than 21.45% with approximate 10.19% performance speed-up.

Analysis Criteria for Choosing Energy Efficient High-Quality Light Sources and Luminaires

2018 ◽  
pp. 113-119
Author(s):  
Gennady Ya. Vagin ◽  
Eugene B. Solntsev ◽  
Oleg Yu. Malafeev
Keyword(s):  
Energy Efficiency ◽  
Energy Efficient ◽  
National Standards ◽  
Light Sources ◽  
The European Union ◽  
High Quality ◽  
Eu Directive ◽  
The World ◽  
A New Technique ◽  
Energy Labelling

The article analyses critera applying to the choice of energy efficient high quality light sources and luminaires, which are used in Russian domestic and international practice. It is found that national standards GOST P 54993–2012 and GOST P 54992– 2012 contain outdated criteria for determining indices and classes of energy efficiency of light sources and luminaires. They are taken from the 1998 EU Directive #98/11/EU “Electric lamps”, in which LED light sources and discharge lamps of high intensity were not included. A new Regulation of the European Union #874/2012/EU on energy labelling of electric lamps and luminaires, in which these light sources are taken into consideration, contains a new technique of determining classes of energy efficiency and new, higher classes are added. The article has carried out a comparison of calculations of the energy efficiency classes in accordance with GOST P 54993 and with Regulation #874/2012/EU, and it is found out that a calculation using GOST P 54993 gives underrated energy efficiency classes. This can lead to interdiction of export for certain light sources and luminaires, can discredit Russian domestic manufacturer light sources and does not correspond to the rules of the World Trade Organization (WTO).

Performance Analysis of TBC-ACO Routing Protocol with Existing Routing Protocols of Wireless Sensor Networks

2017 ◽  
Vol 7 (8) ◽  
pp. 169
Author(s):  
A. Radhika ◽  
D. Haritha
Keyword(s):  
Energy Efficiency ◽  
Wireless Sensor Networks ◽  
Sensor Networks ◽  
Swarm Intelligence ◽  
Routing Protocol ◽  
Routing Protocols ◽  
Energy Efficient ◽  
Sensor Nodes ◽  
Wireless Sensor ◽  
Congestion Aware

Wireless Sensor Networks, have witnessed significant amount of improvement in research across various areas like Routing, Security, Localization, Deployment and above all Energy Efficiency. Congestion is a problem of  importance in resource constrained Wireless Sensor Networks, especially for large networks, where the traffic loads exceed the available capacity of the resources . Sensor nodes are prone to failure and the misbehaviour of these faulty nodes creates further congestion. The resulting effect is a degradation in network performance, additional computation and increased energy consumption, which in turn decreases network lifetime. Hence, the data packet routing algorithm should consider congestion as one of the parameters, in addition to the role of the faulty nodes and not merely energy efficient protocols .Nowadays, the main central point of attraction is the concept of Swarm Intelligence based techniques integration in WSN.  Swarm Intelligence based Computational Swarm Intelligence Techniques have improvised WSN in terms of efficiency, Performance, robustness and scalability. The main objective of this research paper is to propose congestion aware , energy efficient, routing approach that utilizes Ant Colony Optimization, in which faulty nodes are isolated by means of the concept of trust further we compare the performance of various existing routing protocols like AODV, DSDV and DSR routing protocols, ACO Based Routing Protocol  with Trust Based Congestion aware ACO Based Routing in terms of End to End Delay, Packet Delivery Rate, Routing Overhead, Throughput and Energy Efficiency. Simulation based results and data analysis shows that overall TBC-ACO is 150% more efficient in terms of overall performance as compared to other existing routing protocols for Wireless Sensor Networks.

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