A significant proportion of heart bypasses fail - a new patent application says dissolving bandages could help

A corroded lump of bronze from an ancient Greek shipwreck turns out to be an advanced astronomical calculator. explores the latest link between this device and antiquity's most famous mathematician

Campaigners hope the banking industry will follow the Bank of America's decision to refuse loans to coal mining companies that remove mountaintops to dig out the black stuff

December 12, 2008 Doctor Web reports on discovery of a new Trojan — Trojan.Locker.8 — that emerged on the Internet on December 9, 2008. This malicious program blocks access to files and folders on a hard drive and offers a

The updates are causing problems for a small number of users.

ome iPhoto users are experiencing an issue in which photos are missing from their libraries. Even though the library size indicates all files are there, no files are visible in the library even though albums seem to be working properly.

Mac portables have always been attractive to thieves, and can be sold quickly on eBay or other sites. Over the years, many users have inquired about the best ways to secure their laptops. Although there are many solutions for users

The first few hundred meters that a newly hatched turtle swims are the most dangerous of its life. Frantically swimming and surrounded by predators, as many as 30 percent die on their maiden voyage. Curious to know how much energy

Some echo-locating bats seem to be really quiet, appearing to make echo-locating calls that are no louder than 70decibel. But no one had successfully recorded their volume under natural conditions, so Annemarie Surlyyke and Signe Brinklov from University of Southern

In this pedagogical article, we present a simple direct matrix method foranalytically computing the Jacobian of nonlinear algebraic equations that arisefrom the discretization of nonlinear integro-differential equations. The methodis based on a formulation of the discretized equations in vector form

The problem of sampling a discrete-time sequence of spatially bandlimitedfields with a bounded dynamic range, in a distributed,communication-constrained, processing environment is addressed. A central unit,having access to the data gathered by a dense network of fixed-precisionsensors, operating under stringent inter-node

We design a 3/2 approximation algorithm for the Generalized Steiner Treeproblem (GST) in metrics with distances 1 and 2. This is the first polynomialtime approximation algorithm for a wide class of non-geometric metric GSTinstances with approximation factor below 2.

This paper presents a scheduling framework that is configured for, and usedin physic systems. Our work addresses the problem of scheduling variouscomputationally intensive and data intensive applications that are required forextracting information from satellite images. The proposed solution allowsmapping of

We consider the problem of finding equivalent minimal-size reformulations ofSQL queries in presence of embedded dependencies [1]. Our focus is onselect-project-join (SPJ) queries with equality comparisons, also known as safeconjunctive (CQ) queries, possibly with grouping and aggregation. For SPJqueries, the

In this paper a greedy algorithm to detect conflict cliques in intervalgraphs and circular-arc graphs is analyzed. In a graph, a stable set requiresthat at most one vertex is chosen for each edge. It is equivalent to requiringthat at most

Digital identity management intra and inter information systems, and, serviceoriented architectures, are the roots of identity federation. This kind ofsecurity architectures aims at enabling information system interoperability.Existing architectures, however, do not consider interoperability ofheterogeneous federation architectures, which rely on different

Motivation: Profile hidden Markov Models (pHMMs) are a popular and veryuseful tool in the detection of the remote homologue protein families.Unfortunately, their performance is not always satisfactory when proteins arein the 'twilight zone'. We present HMMER-STRUCT, a model construction algorithmand

The two major approaches to sparse recovery are L1-minimization and greedymethods. Recently, Needell and Vershynin developed Regularized OrthogonalMatching Pursuit (ROMP) that has bridged the gap between these two approaches.ROMP is the first stable greedy algorithm providing uniform guarantees.Even more recently,

We address the problem of finding a "best" deterministic query answer to aquery over a probabilistic database. For this purpose, we propose the notion ofa consensus world (or a consensus answer) which is a deterministic world(answer) that minimizes the expected

A software application that enables you to replace written text with your voice