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Association for Computing Machinery (282 results)
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- 10+ IT organizations that can boost your career
- Joining a professional organization is more than just a convenient way to beef up your resume. Groups such as the ones listed below can help you enhance your technical and career skills. If you need a first-hand opinion about a vendor -- or you want the inside scoop on a...
- Blog posts 2008-02-11
- The big election beta test
- Hello? ACM has been against e-voting!Electronic voting is a disaster in the making. The Association for Computing Machinery has written its own report and also canvassed members like me and concluded that electronic-only voting is not a trustworthy way to run a democracy.Amen!Amen! No paper trail means...
- Discussion threads 2004-11-01
- Investigating the Exhaustivity Dimension in Content-Oriented XML Element Retrieval Evaluation
- INEX, the evaluation initiative for content-oriented XML retrieval, has since its establishment defined the relevance of an element according to two graded dimensions, exhaustivity and specificity. The former measures how exhaustively an XML element discusses the topic of request, whereas specificity measures how focused the element is on the topic...
- White papers 2006-11-11
- Laboratory Experiments for Network Security Instruction
- This paper describes a sequence of five experiments on network security that cast students successively in the roles of computer user, programmer, and system administrator. Unlike experiments described in several previous papers, these experiments avoid placing students in the role of attacker. Each experiment starts with an in-class demonstration of...
- White papers 2006-07-06
- A Scalable, Commodity Data Center Network Architecture
- Today's data centers may contain tens of thousands of computers with significant aggregate bandwidth requirements. The network architecture typically consists of a tree of routing and switching elements with progressively more specialized and expensive equipment moving up the network hierarchy. Unfortunately, even when deploying the highest-end IP switches/routers, resulting topologies...
- White papers 2008-08-22
- Data Visualisation and Data Mining Technology for Supporting Care for Older People
- The overall purpose of the paper is the enhancement of home-based care by revealing individual patterns in the life of a person, through modelling of the "Busyness" of activity in their dwelling, so that care can be better tailored to their needs and changing circumstances. The use of data mining...
- White papers 2007-10-17
- A Generic XML Language for Characterising Objects to Support Digital Preservation
- The dominance of digital objects in today's information landscape has changed the way humankind creates and exchanges information. However, it has also brought an entirely new problem: the longevity of digital objects. Due to the fast changes in technologies, digital documents have a short lifespan before they become obsolete. Digital...
- White papers 2008-03-20
- Querying and Maintaining a Compact XML Storage
- As XML database sizes grow, the amount of space used for storing the data and auxiliary data structures becomes a major factor in query and update performance. This paper presents a new storage scheme for XML data that supports all navigational operations in near constant time. In addition to supporting...
- White papers 2007-05-12
- PAT: Peer-Assisted Transcoding for Overlay Streaming to Heterogeneous Devices
- With the increasing deployment of Internet P2P/overlay streaming systems, more and more clients use mobile de-vices, such as smart phones, PDAs, to access these Internet streaming services. Compared to wired desktops, mobile devices normally have smaller screen size, less color depth, and lower bandwidth and thus cannot correctly and effectively...
- White papers 2007-04-20
- Scalable Robust Covariance and Correlation Estimates for Data Mining
- Covariance and correlation estimates have important applications in data mining. In the presence of outliers, classical estimates of covariance and correlation matrices are not reliable. A small fraction of outliers, in some cases even a single outlier, can distort the classical covariance and correlation estimates making them virtually useless. That...
- White papers 2008-01-01
- On Privacy Preservation Against Adversarial Data Mining
- Privacy preserving data processing has become an important topic recently because of advances in hardware technology which have lead to widespread proliferation of demographic and sensitive data. A rudimentary way to preserve privacy is to simply hide the information in some of the sensitive fields picked by a user. However,...
- White papers 2006-08-23
- NANA: A Nano-Scale Active Network Architecture
- This paper explores the architectural challenges introduced by emerging bottom-up fabrication of nanoelectronic circuits. The specific nanotechnology the paper explores proposes patterned DNA nanostructures as a scaffold for the placement and interconnection of carbon nanotube or silicon nanorod FETs to create a limited size circuit node. Three characteristics of this...
- White papers 2006-02-09
- Conveying Mood and Emotion in Instant Messaging by Using a Two-Dimensional Model for Affective States
- This paper discusses the development and initial experiences with an Instant Messaging IM system that has been enhanced with functionality that facilitates the expression of affective states. This functionality is based on: the use of a graphical, two-dimensional base model developed by psychology researchers; refinements of the base model to...
- White papers 2006-11-22
- High-Bandwidth Mesh-Based Overlay Multicast in Heterogeneous Environments
- This paper presents MeshCast, a peer-to-peer (p2p) multicast protocol for applications requiring high bandwidth such as live video streaming from a server to a large number of receivers. Traditional tree-based approaches to overlay multicast inefficiently utilise the outgoing bandwidth of participating nodes and poorly adapt to node membership churn. In...
- White papers 2006-10-10
- A Gateway Architecture for Mobile Multimedia Streaming
- Transmission of digital audio and video streams is one of the major applications in future wireless networks. Increasing bandwidths and processing power make it possible to receive video streams almost everywhere. But the classes of mobile devices vary from multimedia enabled mobile phones to high-end notebooks. The capabilities of these...
- White papers 2006-09-20
- Offering a Multicast Delivery Service in a Programmable Secure IP VPN Environment
- The programmable network approach is one possible solution to quickly adapt existing infrastructures to new requirements. This paper shows how programmable net-working can be exploited within a VPN environment to offer a secure group communication service across the Internet. The paper shows how the IP VPN approach offloads security, management...
- White papers 2008-01-01
- On Decidability of Nominal Subtyping With Variance
- This paper investigates the algorithmics of subtyping in the presence of nominal inheritance and variance for generic types, as found in Java 5, Scala 2.0, and the .NET 2.0 Intermediate Language. They prove that the general problem is undecidable and characterize three different decidable fragments. From the latter, they conjecture...
- White papers 2006-12-21
- Can Internet Video-on-Demand Be Profitable?
- Video-on-Demand in the Internet has become an immensely popular service in recent years. But due to its high band-width requirements and popularity, it is also a costly service to provide. This paper considers the design and potential benefits of peer-assisted Video-on-Demand, in which participating peers assist the server in delivering...
- White papers 2007-08-31
- Deciding the Physical Implementation of ETL Workflows
- This paper deals with the problem of determining the best possible physical implementation of an ETL workflow, given its logical-level description and an appropriate cost model as inputs. The paper formulates the problem as a state-space problem and provides a suitable solution for this task. The paper further extends this...
- White papers 2007-11-09
- Extracting Link Spam Using Biased Random Walks From Spam Seed Sets
- Link spam deliberately manipulates hyperlinks between web pages in order to unduly boost the search engine ranking of one or more target pages. Link based ranking algorithms such as PageRank, HITS, and other derivatives are especially vulnerable to link spam. Link farms and link exchanges are two common instances of...
- White papers 2007-05-08
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