We present Symphony, a novel protocol for maintaining distributed hash tables in a wide area network. The key idea is to arrange all participants along a ring and equip them with long distance contacts drawn from a family of harmonic distributions. Through simulation, we demonstrate that our construction is scalable, exible, stable in the presence of frequent updates and o ers small average lat...

We study the effect of Coulomb interactions on the conductance of a single-mode quantum wire connecting two bulk leads. When the density of electrons in the wire is very low, they arrange in a finite-length Wigner crystal. In this regime the electron spins form an antiferromagnetic Heisenberg chain with an exponentially small coupling J. An electric current in the wire perturbs the spin chain a...

Fractal coding of digital images ooers many promising qualities. However the coding process suuers from the long search time of the domain block pool. In this paper, we obtain mathematical results on the distance measure used in the search. Then we derive an incremental procedure to bound the domain block pixels. We arrange the domain blocks in a tree structure, and utilise the procedure to dir...

When we need to find the cheapest airfare, we call our travel agent, Betsi, at Prestige Travel. We are able to communicate with Betsi because we all speak the same language, English, and we all understand the basic elements of the subject matter under discussion, such as tickets, planes, destinations, departure times, and fares. But, suppose it is after hours and we are all busy, so we would in...

This paper considers distributed estimation over heterogeneous sensor networks. We propose a distributed estimation strategy based on PageRank algorithm, where the link weight depends on the edge estimation covariances. We prove that the proposed estimator obtains better estimates than one typical estimator under identical initial conditions. Motivated by the advantage of the sensors with high ...

Using lifelogging tools, personal digital artifacts are collected continuously and passively throughout each day. The wealth of information such an archive contains on our life history provides novel opportunities for the creation of digital life narratives. However, the complexity, volume and multimodal nature of such collections create barriers to achieving this. Nine participants engaged in ...

T HE DESIGN used in this study –quasiexperimental–is unfamiliar to clinical readers. There are few easily available worksheets or prescriptive methods for reviewing such an article. We used 2 excellent resources to generate questions used in the evaluation of this article, modified by 2 of us (M.H. and W.B.), and reordered here to match the sequence of the study. The graphic (Figure) helps to a...

Consider a society in which the production and enforcement of law is entirely private. Individuals contract with rights enforcement firms to protect their rights and arrange for the settlement of legal disputes to which they are a party. Each pair of enforcement firms contracts with an arbitration agency, a private court, to settle disputes between their customers, agreeing to accept and enforc...

Given an integer b and a finitely presented group G, we produce a compact symplectic 6-manifold with c1 = 0, b2 > b, b3 > b and π1 = G. In the simply connected case, we can also arrange for b3 = 0; in particular, these examples are not diffeomorphic to Kähler manifolds with c1 = 0. The construction begins with a certain orientable, four-dimensional, hyperbolic orbifold assembled from right-angl...

The paper describes a set of seven fundamental principles for achieving “best concurrency and simultaneity.” The concurrent approach is gaining worldwide attention at this moment. The paralleling of life-cycle activities and process restructuring are being deemed necessary by more and more industries. An automobile product development process example is used in this paper to illustrate many asp...