Monitoring the activity of equipment in datacenters is often a key element in designing large scale network and IT infrastructure. the information collected by direct parameter observations (such as total network traf...
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ISBN:
(纸本)9781467381970
Monitoring the activity of equipment in datacenters is often a key element in designing large scale network and IT infrastructure. the information collected by direct parameter observations (such as total network traffic, CPU usage, etc.) represents a first step in the overall system performance optimization. A second one is denoted by data analytics and decision making strategies based on the values obtained in the (parameter) acquisition phase. the computing effort required to process the stored data can be sometimes important, setting a necessary but costly burden upon the existing datacenter analytics infrastructure. To address this issue, the present paper proposes a decentralized and cooperating architecture where end user machines will execute at least partially some of the data analytics code and return subsequently the results to managing server units in the datacenter.
Building a secure electronic voting system that offers the fairness and privacy of current voting schemes, while providing the transparency and flexibility offered by electronic systems has been a challenge for a long...
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ISBN:
(纸本)9781538672358
Building a secure electronic voting system that offers the fairness and privacy of current voting schemes, while providing the transparency and flexibility offered by electronic systems has been a challenge for a long time. In this work-in-progress paper, we evaluate an application of blockchain as a service to implement distributed electronic voting systems. the paper proposes a novel electronic voting system based on blockchain that addresses some of the limitations in existing systems and evaluates some of the popular blockchain frameworks for the purpose of constructing a blockchain-based e-voting system. In particular, we evaluate the potential of distributed ledger technologies through the description of a case study;namely, the process of an election, and the implementation of a blockchain-based application, which improves the security and decreases the cost of hosting a nationwide election.
the aim of this paper is to present the recent development in the design and implementation of distributed Microwave Integrated Circuits (MICs). MIC technology has experienced a tremendous growth during the last years...
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ISBN:
(纸本)9781934272268
the aim of this paper is to present the recent development in the design and implementation of distributed Microwave Integrated Circuits (MICs). MIC technology has experienced a tremendous growth during the last years. It has matured to the extend that multifunction circuits including transmitters and receivers can be incorporated in one module. We introduce the basics of distributed MIC which include the basics of distributed active and passive Circuits (distributed microstrip amplifiers, oscillators, couplers, and diode mixers). the paper demonstrates two different SOP MIC transceiver modules in addition to microstrip patch antenna. the designed MIC modules have many applications especially in Wireless Communications, Wireless networking, Digital Communications, Radar Systems Deep Space Communications, Medical Imaging and Treatment, and Radio Spectrometry.
Mobile communication has become an integral part of everybody's life. the global internet traffic is increasing at an alarming rate because of the demand for internet content like web pages, audio files, and video...
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ISBN:
(纸本)9781728152868
Mobile communication has become an integral part of everybody's life. the global internet traffic is increasing at an alarming rate because of the demand for internet content like web pages, audio files, and videos. the success of the internet is because of the success of various internet applications which is also the reason for growing internet traffic. this has led to redefining the IP stack by allowing the content-centric networking, CCN. CCN is dependent on the caching contents in-network and off-network nodes. there have been various strategies on how to cache the contents. the Quality of Service offered by the providers improves with a proper selection of caching strategy, which helps in increasing the network efficiency by lowering the bandwidth of the network. the selection of an appropriate caching strategy also proves to improve the user's quality of experience. this paper discusses the need, architecture of CCN, the various caching strategies and a comparative study on LCE, LCD, ProbCache and MAGIC caching strategies by running in a common simulation environment.
this paper describes an architecture for real-time environmental modeling. It consists of a wireless mesh network equipped with sensors and a cloud-based infrastructure to perform real-time environmental simulations u...
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ISBN:
(纸本)9781479961238
this paper describes an architecture for real-time environmental modeling. It consists of a wireless mesh network equipped with sensors and a cloud-based infrastructure to perform real-time environmental simulations using a physics-based model combined with an Ensemble Kalman Filter. the purpose of the system is to optimize groundwater abstraction close to a river. these initial studies demonstrate that the cloud infrastructure can simultaneously compute a large number of simulations, thus allowing for the implementation of Ensemble Kalman Filters in real-time.
Withthe advent of computational grids, networking performance over the wide-area network (WAN) has become a critical component in the grid infrastructure. Unfortunately, many, high-performance grid applications only ...
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ISBN:
(纸本)0769516866
Withthe advent of computational grids, networking performance over the wide-area network (WAN) has become a critical component in the grid infrastructure. Unfortunately, many, high-performance grid applications only use a small raction of the available bandwidth because operating systems and their associated protocol stacks are still tuned for yesterday's WAN speeds. As a result, network gurus undertake the tedious process of manually tuning system buffers to allow TCP flow control to scale to today's WAN grid environments. Although recent research has shown how to set the size of these system buffers automatically at connection set-up, the buffer sizes are only appropriate at the beginning of the connection's lifetime. To address these problems, we describe an automated and scalable technique called dynamic right-sizing. We implement this technique in user space (in particular for bulk-data transfer) so that end users do not have to modify the kernel to achieve a significant increase in throughput.
In order to deal withthe large scale access to billions of users currently, large internet companies have adopted the distributed service of parallel processing to support it. the uncertainty of user behavior and sof...
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ISBN:
(纸本)9783319289106;9783319289090
In order to deal withthe large scale access to billions of users currently, large internet companies have adopted the distributed service of parallel processing to support it. the uncertainty of user behavior and software multi-tier architecture led to the distributed service behavior of uncertainty and complex dynamic combination between services, so it is difficult to detect the service bottleneck of distributed service. In this paper, we propose a service bottleneck discovery model of distributed service which is based on the two layer structure: the analysis based on the behavior attribute of the service and the relationship between the services.
Combining data from disparate sources enhances the opportunity to explore different aspects of the phenomena under consideration. However, there are several challenges in doing so effectively that include, inter alia,...
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ISBN:
(纸本)9781538655047
Combining data from disparate sources enhances the opportunity to explore different aspects of the phenomena under consideration. However, there are several challenges in doing so effectively that include, inter alia, the heterogeneity in data representation and format, collection patterns, and integration of foreign data attributes in a ready-to-use condition. In this study, we have designed a scalable query-oriented distributed data integration framework, CONFLUENCE, that also dynamically generates accurate interpolations for the targeted spatiotemporal scopes along with an estimate of the uncertainty involved with such estimation in case of spatiotemporal misalignment of datapoints. CONFLUENCE efficiently orchestrates computations to evaluate spatiotemporal query joins and facilitates distributed query evaluations with a dynamic relaxation of query constraints. Query evaluations are locality-aware and we leverage model-based dynamic parameter selection to provide accurate estimation for data points. We have included empirical benchmarks that profile our system in terms of accuracy, latency, and throughput at scale and also demonstrate its improvement in performance in a distributed cloud computing environment over GeoMesa, a Spark-based geospatial analytics framework.
the cooperation among people is one of the key factors for most processes and activities. the efficiency and the effectiveness of the cooperation has an intrinsic value, which significantly affects performances and ou...
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ISBN:
(纸本)9783319289106;9783319289090
the cooperation among people is one of the key factors for most processes and activities. the efficiency and the effectiveness of the cooperation has an intrinsic value, which significantly affects performances and outcomes. Open communities, as well as spontaneous or predefined virtual organizations, are demanding for a more solid and consistent support for activity scheduling and managing in a context of flexibility and respect of the individual needs. this paper proposes a privacy-friendly model to support virtual organizations in the scheduling and management of their most valuable resource: the time.
the tremendous increase in implementing IoT devices for critical infrastructures yells for higher performance and robust protection. Traditional cloud based IoT architecture is unsuitable for delay-sensitive or real-t...
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