With the popularity of mobile devices, spatial crowdsourcing is rising as a new framework that enables human workers to solve tasks in the physical world. With spatial crowdsourcing, the goal is to crowdsource a set of spatiotemporal tasks (i.e., tasks related to time and location) to a set of workers, which requires the workers to physically travel to those locations in order to perform the ta...

A crucial step in exploiting the information inherent in genome sequences is to assign to each protein sequence its three-dimensional fold and biological function. Here we describe fold assignment for the proteins encoded by the small genome of Mycoplasma genitalium. The assignment was carried out by our computer server (http://www.doe-mbi.ucla.edu/people/frsvr/ frsvr. html), which assigns fold...

Widespread replication of information can ameliorate the problem of server overloading but raises the allied question of server selection. Clients may be assigned to a replica in a static manner or they may choose among replicas based on client-initiated measurements. The latter technique, called dynamic server selection (DSS), can provide signi®cantly improved response time to users when compa...

Introduction. While group work that takes place in education contexts has been studied by researchers, student collaborative research behaviour has received less attention.This empirical case study examined the strategies that students use and the obstacles they encounter while working in collaborative information seeking contexts on an in-class assignment. Methods. Participants were college st...

Abstra t Di erentiated servi e approa h has been proposed as a potential solution to provide Quality of Servi es (QoS) in the next generation Internet. The ultimate goal of end-to-end servi e di erentiation an be a hieved by omplementing the network-level QoS with the servi e differentiation at the Internet servers. In this paper, we have presented a detailed study of the performan e of servi e...

Considering a video/audio server deployed on the gateway node of a wireless mesh network, a large amount of clients distributed on various mesh routers may wish to receive multimedia streams from the server simultaneously. In order to offer high-quality of streams, only non-overlapping channels are allowed to be allocated to links to avoid interference. Hence, the problem studied in this paper ...

In this paper we present a new Document Management System called DrStorage. This DMS is multi-platform, JCR-170 compliant, supports WebDav, versioning, user authentication and authorization and the most widespread file formats (Adobe PDF, Microsoft Office, HTML,...). It is also easy to customize in order to enhance its search capabilities and to support automatic metadata assignment. DrStorage ...

We investigate the video assignment problem of a hierarchical Video-on-Demand (VOD) system in heterogeneous environments where different quality levels of videos can be encoded using either replication or layering. In such systems, videos are delivered to clients either through a proxy server or video broadcast/unicast channels. The objective of our work is to determine the appropriate coding s...

The EC numbers represent enzymes and enzyme genes (genomic information), but they are also utilized as identifiers of enzymatic reactions (chemical information). In the present work (ECAssigner), our newly proposed reaction difference fingerprints (RDF) are applied to assign EC numbers to enzymatic reactions. The fingerprints of reactant molecules minus the fingerprints of product molecules wil...

The Swarm storage system uses log-based striping to achieve high performance. Clients collect application writes in a log and stripe the log across multiple storage servers to aggregate server bandwidth. The Swarm storage server has been designed to meet various requirements of the Swarm storage system. These include high performance for data-intensive operations, rapid crash recovery, security...