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Computers RSS FeedsResource Sharing Problem of Timing Variation-Aware Task Scheduling and Binding in MPSoC - This work addresses the new problem of timing variation-aware (TV) task scheduling and binding (TSB) for multiprocessor system-on-chip (MPSoC) architecture in the system-level design, where tasks have the full flexibilities of resource (i.e. processor) sharing to meet the design constraints. With the timing variation of processors’ clock speed, it has been observed that the consideration of the effect of resource sharing on the resulting p...Feed Source: comjnl.oxfordjournals.org Implementing a Thermal-Aware Scheduler in Linux Kernel on a Multi-Core Processor -
As power dissipation causes thermal issues in cooling costs, lifetime and reliability, thermal management has become an important issue in today's OS and processor design. Early OS-level thermal management schemes were proposed and evaluated mainly with simulators or analytical models. In this paper, we implement a thermal-aware round-robin scheduling algorithm in the Linux kernel, and compare its performance with the ‘Heat-and-Run’ ... Design of On-Chip Crossbar Network Topology Using Chained Edge Partitioning -
This paper proposes an efficient topology synthesis method for on-chip interconnection network based on crossbar switches. The efficiency of topology synthesis methods is often measured by two metrics—the quality of the synthesized topology and synthesis time. These two metrics are critically determined by the definition of the topology design space and the exploration method. Furthermore, an efficient representing method for the design sp... Distributed Hash Table-Based Interrogating-Call Session Control Function Network in the Internet Protocol Multimedia Subsystem for Efficient Query Services -
Internet protocol multimedia subsystem (IMS) is an overlaid infrastructure above the packet-switched domain of the universal mobile telecommunication system core network. IMS enables and enhances real-time multimedia mobile services. IMS signaling and media are separated in IMS. For media session negotiation, two basic procedures in IMS are (i) IMS registration procedure and (ii) IMS incoming call setup procedure. IMS signaling needs to traverse... Side-Channel Attack Using Meet-in-the-Middle Technique -
In this paper, we introduce a new side-channel attack using block cipher cryptanalysis named a meet-in-the-middle attack. Using our new side-channel technique we show that advanced encryption standard (AES) with reduced 10 masked rounds is broken, which is faster than the exhaustive key search attack. This implies that one has to mask the entire rounds of the 12-round 192-bit key AES to prevent our attacks. Our result is the first one to analyse... Multicast Key Management without Rekeying Processes -
Secure multicast provides efficient delivery which includes an identical data from a source to multiple receivers. A common solution is to apply a symmetric key that is used to encrypt the transmitted data. However, the heavy cost of the rekeying process is the main problem in large and dynamic multicast groups. The tree-based architecture is widely used to reduce the rekeying cost in terms of storage, transmission and computation. However, it u... Robust Super-Peer-Based P2P File-Sharing Systems -
This paper presents an efficient approach for improving file availability in super-peer-based peer-to-peer (P2P) file-sharing systems. In the super-peer-based P2P file-sharing system, peers are organized into multiple groups. In each group, there is a special peer called super-peer to serve the regular peers within the same group. With this property, the proposed approach utilizes the super-peer to tolerate the departure (failure) of a regular p... A Bandwidth-Based Power-Aware Routing Protocol with Low Route Discovery Overhead in Mobile Ad hoc Networks -
In the design of power-aware on-demand routing protocols in mobile ad hoc networks, it must be taken into account that nodes may use a great amount of power to find the desired routing path during the path-discovery phase. In addition, in previous research on power-aware routing protocols, the path bandwidth was often not considered. In this paper, we tackle these issues by proposing a power-aware routing protocol with low route requests (LRR) t... Sensornet Protocol Tuning Using Principled Engineering Methods -
Sensornet designers seek to maximize energy efficiency while maintaining acceptable Quality of Service. However, the interactions between multiple tunable protocol parameters and multiple performance metrics are generally complex and unknown, and combinatorial explosion renders impossible any exhaustive search approach. Most work published to date employs seemingly arbitrary choices of protocol parameters, derived by informal judgement and limit... Protection Against Denial of Service Attacks: A Survey -
Denial of service (DoS) is a prevalent threat in today's networks because DoS attacks are easy to launch, while defending a network resource against them is disproportionately difficult. Despite the extensive research in recent years, DoS attacks continue to harm, as the attackers adapt to the newer protection mechanisms. For this reason, we start our survey with a historical timeline of DoS incidents, where we illustrate the variety of types, t... Management of Server Farms for Performance and Profit -
We examine some of the problems associated with managing a server farm, that is, a collection of servers which are used to provide different types of services to paying customers. The users are charged for the services provided, but are also promised that certain Quality-of-Service (QoS) criteria will be met. Failure to satisfy those QoS undertakings incurs pre-specified penalties. In order to maximize the revenue obtained, the service provider ... Energy-Efficient Cloud Computing -
Energy efficiency is increasingly important for future information and communication technologies (ICT), because the increased usage of ICT, together with increasing energy costs and the need to reduce green house gas emissions call for energy-efficient technologies that decrease the overall energy consumption of computation, storage and communications. Cloud computing has recently received considerable attention, as a promising approach for del... Adaptive Random Re-Routing for Differentiated QoS in Sensor Networks -
Sensor networks (SNs) consist of spatially distributed sensors which monitor an environment, and which are connected to some sinks or backbone system to which the sensor data is being forwarded. In many cases, the sensor nodes themselves can serve as intermediate nodes for data coming from other nodes, on the way to the sinks. Much of the traffic carried by SNs will originate from routine measurements or observations by sensors that monitor a pa... An ID-Based Mutual Authentication and Key Exchange Protocol for Low-Power Mobile Devices -
The identity (ID)-based public-key system using bilinear pairings defined on elliptic curves offers a flexible approach to simplify the certificate management. In 2006, the IEEE P1363.3 committee has defined the ID-based public-key system with bilinear pairings as one of public-key cryptography standards. In this, an authenticated key agreement (AKA) protocol is one important issue that provides mutual authentication and key exchange between two... Task Allocation and Optimization of Distributed Embedded Systems with Simulated Annealing and Geometric Programming -
We consider the task model of periodic tasks running on a network of processor nodes connected by a bus based on the time-triggered protocol, an industry-standard bus protocol designed for safety-critical automotive and avionics distributed embedded systems, and present an integrated optimization framework that jointly considers one or more of the following attributes: task-to-processor allocation, task priority assignment, task period assignmen... New Benchmarks for Large-Scale Networks with Given Maximum Degree and Diameter -
Large-scale networks have become ubiquitous elements of our society. Modern social networks, supported by communication and travel technology, have grown in size and complexity to unprecedented scales. Computer networks, such as the Internet, have a fundamental impact on commerce, politics and culture. The study of networks is also central in biology, chemistry and other natural sciences. Unifying aspects of these networks are a small maximum de... Security Metrics Foundations for Computer Security -
Security has been among top priority in computer information systems for more than a decade. Despite the importance of this area, it is interesting to note that the area still lacks (completeness of) one of its basic elements of scientific arsenal, which is metric. This paper therefore presents the situation in this field by giving an analysis of existing metrics that could serve the above-mentioned purpose. Further, it presents a generic risk m... Engineering Policy-Based Ubiquitous Systems -
The advent of miniaturized sensors that can be carried on the body or embedded in the environment, together with ubiquitous ‘smartphones’ with various sensors means that ubiquitous computing systems already pervade our lives. However, for them to ‘disappear’ in the background, they need to be adaptive, autonomous and self-managing. We present an architectural model based on policy-based self-managed cells for engineering ... Is Your Internet Connection Icon Gone Forever? + All Of Your Hard Drive Questions Answered + Give Yourself A New Windows Personality -
... Does Your Windows Have A Vital Part Missing? + Learn All About The Brain Of Your Computer + WorldStart Blog Update - What's Going On Now? -
... The Key To Backing Up Vital Windows Updates + Do Away With Double Clicking For Good + The Secret To A Faster Computer Search -
... Has Your Flash Drive Reached Critical Capacity? + Put A New Spin On Your Desktop Icons + Just Say No To AutoScroll -
... Is Google Invading Your Privacy? + Sick Of Tedious Logins? + A Secret Keyboard Trick You Have To Try -
... All Of Your Social Networking Questions Answered + Has Your Play Button Gone Missing? + Add A Little Character To Your Computer -
... Is Your Computer Deleting Files Without Asking? + Play Desktop Icon Hide-And-Seek + WorldStart Blog Update - The Hottest Topics -
... Is Google Going To Replace Your Home Phone? + Get The Highest Quality And Performance Out Of Your Image Files + Sharing Your Favorites Just Got Easier -
... DNA Profiles Link Dope to Its Source - 09 Jul 03
Forensic scientists in the U.S. are applying DNA fingerprinting methods to the cannabis plant. They say the technique, which is being used to create a database of DNA profiles of different marijuana plants, will help them to trace the source of any sample.
'It links everybody together: the user, the distributor, the grower,' says the database's creator, Heather Miller Coyle of the Connecticut State Forensic Science Laboratory in Meriden... Mathematics: Does the Proof Stack Up? - by George Szpiro
03 Jul 03
Just under five years ago, Thomas Hales made a startling claim. In an e-mail he sent to dozens of mathematicians, Hales declared that he had used a series of computers to prove an idea that has evaded certain confirmation for 400 years. The subject of his message was Kepler's conjecture, proposed by the German astronomer Johannes Kepler, which states that the densest arrangement of spheres is one in which they are stack... Scientists Discover Planetary System Similar to Our Own -
The image shows an impression by David A. Hardy of a possible scene from a moon orbiting the extra-solar planet in orbit around the star HD70642. Photo Credit: David A. Hardy.
... Hacker How-To Good Summer Reading - by Michelle Delio
27 Jun 03
Stealing the Network: How to Own the Boxby Ryan RussellSyngress, 330 pp., $49.95
Stealing The Network: How to Own the Box, a compendium of tales written by well-known hackers, is a perfect summer read. The stories are fictional. The technology and techniques described are very real.
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