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coherence

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Scalable, Grid-Enabled Service-Oriented Architecture Using Oracle Coherence

whitepaper One of the greatest benefits of a service-oriented architecture (SOA) grid is that the cost of scalability is more predictable and efficient because of the option of using commodity hardware. This makes an SOA grid a highly efficient architecture...

Tags: monitoring systems

[03 May 2008]

Oracle Coherence: Providing Extreme Performance, Predictable Scalability, and Continuous Availability for Mission-Critical Java Applications

whitepaper Organizations can gain significant advantage by managing and exploiting their information systems more effectively than their competitors. But with today's tight budget constraints and technology limitations, many miss the opportunity - sometimes...

Tags: high availability

[22 Apr 2008]

Calculating the Return on Investment for Clustered Caching and Data Grid Solutions

whitepaper This white paper demonstrates the ROI of clustered caching and data grid solutions using Oracle Coherence. At a time of increasingly strict financial controls, improvements to operational systems must have a quantifiable return on investment (ROI).

Tags: middleware, budget, roi, coherence

[14 Apr 2008]

Virtual Hierarchies to Support Server Consolidation

whitepaper It develops the paper's central idea of imposing a two-level virtual (or logical) coherence hierarchy on a physically flat CMP that harmonizes with VM assignment. Server consolidation is becoming an increasingly popular technique to manage and...

Tags: processors

[29 Feb 2008]

Accelerating Real-Time Shading With Reverse Reprojection Caching

whitepaper However, the significant temporal coherence in visible surface regions, lighting conditions, and camera location allows reusing computationally-intensive shading calculations between frames to achieve significant performance improvements at little...

Tags: programming languages

[28 Feb 2008]

Conversational Coherence: Using Email Threads to Coordinate Distributed Work

whitepaper In studying the electronic mail exchanges of organizational members during one year, we found that they engaged in a range of threading activity to establish and maintain continuity, coherence, and coordination in their collaborative work over time.

Tags: email

[19 Feb 2008]

Approaches of Wireless TCP Enhancement and a New Proposal Based on Congestion Coherence

whitepaper TCP is known to have poor performance over unreliable wireless links where packet losses due to transmission errors are misinterpreted as indications of network congestion. TCP enhancements proposed in the literature differ in their signaling and...

Tags: tcp - ip

[14 Jan 2008]

HOECHST a Well Orchestrated Migration From R/2 4.4 to R/3

whitepaper A dual concern for the independence and coherence of the structural entities of the organisation has underlain this project, carried out in masterly fashion in less than six months by Guy Vankerkhoven's team (Hoechst), backed up by Siemens Nixdorf...

Tags: erp, client, siemens, sap

[02 Nov 2007]

Synchronization of TCP Flows in Networks With Small DropTail Buffers

whitepaper This paper describes this dynamic using a weakly-coupled oscillator model and analyzes the coherence of oscillation as a function of coupling strength. The paper shows that increased coupling leads to increased coherence and to larger variations in...

Tags: tcp - ip, considers, coupling, coherence

[30 Oct 2007]

The DAM Book: Digital Asset Management for Photographers - What Is All This DAM Stuff?

whitepaper Adobe Bridge, Camera Raw 3, the new IPTC tools, the Digital Negative (DNG) file format, and cataloging software can bring to integrated digital asset management the same coherence that ICC workflow brought to color management.

Tags: asset management, photography, automatic, workflow

[10 Oct 2007]

Design of a Multiband OFDM System for Realistic UWB Channel Environments

whitepaper For narrow-band systems, these reflections will not be resolvable by the RX when the narrow-band system bandwidth is less than the coherence bandwidth of the channel. There are many differences between real-world behavior of narrow-band and UWB...

Tags: wireless lan, bandwidth, channel, band

[25 Jul 2007]

Perfect Spatial Hashing

whitepaper Whereas prior hashing work strives for pseudorandom mappings, the authors instead design the hash function to preserve spatial coherence and thereby improve runtime locality of reference. This paper explores using hashing to pack sparse data into a...

Tags: graphics applications, graphics, function, reference

[19 Jul 2007]

The Unified File Cache (UFC) in HP-UX 11i V3

whitepaper If an application uses the different types of access simultaneously to access data in a file, then HP-UX does not guarantee coherence because the same data might reside in both caches. The Unified File Cache (UFC) - a new feature in HP-UX 11i v3...

Tags: hp-ux, file, memory, cache

[08 May 2007]

Estimating Disparity and Occlusions in Stereo Video Sequences

whitepaper The algorithm is also able to exploit temporal coherence more appropriately than many previous approaches to temporal stereo, by employing additional states in the Markov random field. This paper proposes an algorithm for estimating disparity and...

Tags: software engineering, field, sequences, temporal

[08 May 2007]

On Performance Limits of MIMO-OFDM Systems Over Block-Fading Channels

whitepaper This bound not only determines the merit of codes in the sense of error performance, but it also provides a tool to explore the performance limits of system in terms of parameters such as number of antennas, coherence time, coherence bandwidth...

Tags: wireless lan, channel, space, error

[13 Apr 2007]

Spherical Linear Interpolation for Transmit Beamforming in MIMO-OFDM Systems With Limited Feedback

whitepaper To reduce the feedback required, this paper proposes to exploit channel coherence to send back only a fraction of the beamforming vectors. The coherence of the transmit beamforming vectors is established.

Tags: wireless lan, channels, frequency, channel

[11 Apr 2007]

Concatenated Codes Design for OFDM Based Wireless Local Area Networks

whitepaper The advantages of OFDM systems are high spectrum efficiency, longer symbol duration against Inter-Symbols Interference (ISI) effect in multi-path environments, and narrow transmission band of each sub-carrier within coherence bandwidth such that...

Tags: wireless lan, frequency, channel, communication systems

[11 Apr 2007]

Using Uncacheable Memory to Improve Unity Linux Performance

whitepaper Although cache is popular, it is expensive to assure cache coherence and it is not advantageous with a poor locality program. This paper points out that uncacheable memory, to a memory area with cache disabled, will have better performance in some...

Tags: linux - open source, memory, cache, aspects

[01 Apr 2007]

Metropolis and SOA Governance

whitepaper In the collaborative planning approach, order and coherence emerge from distributed activity, with no central design authority. Each unit of procurement, development, or maintenance activity has to be regarded as a project, with project outputs...

Tags: web services, governance, activity, procurement

[31 Mar 2007]

"Are You With Me?" - Using Accelerometers to Determine if Two Devices Are Carried by the Same Person

whitepaper This paper presents a method based on a coherence function, a measure of linear correlation in the frequency domain, to reliably analyze walking data recorded by low-cost MEMS accelerometers to determine if two devices are carried by the same person.

Tags: bluetooth, algorithm, person, domain

[13 Jun 2006]

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