This paper presents an application of the dynamic reservation protocol on DECT systems for prioritized multirate mobile data services. This protocol allows data terminals to access uplink channels through contention-free reservations. It can adapt to traffic variations by dynamically changing the transmission cycle length. Since this protocol is built on the top of the DECT physical layer, it c...

A very fast algorithm to generate a semitriangular basis for trades consisting of minimal trades (sparsest basis) is given. By augmenting the elements of this basis, we construct an infinite family of 2-designs. MIRAMARE TRIESTE August 1988 To be submitted for publication. This research was supported in part by a grant from the Research Council of the University of Tehran and was completed whil...

GriPhyN has taken for its mission the development of general tools for managing and analyzing virtual data in petabyte-scale grid environments (Petascale Virtual-Data Grids or PVDGs) and providing a “Virtual Data Toolkit” (VDT) that we hope will be used by other data intensive scientific disciplines. This is a tall order. There are several distinct tasks related to virtual data that must be und...

Due to the multiplicity of mobile computer terminals and communicating objects in our daily life, we observe the emergence of applications using the notion of context. We propose a survey on mobile and ambient computing and then present a model for solving the problem of the interaction between the computer, the user and their environment. We propose a set of definitions of that notion. This is...

Many current human face detection algorithms make implicit assumptions about the scale, orientation or viewpoint of faces in an image and exploit these constraints to detect and localize faces. The algorithm may be robust for the assumed conditionsbut however it becomes very difficult to extend the results to general imaging conditions. In an earlier paper, we proposed a feature-based face dete...

513 Abstract—This paper proposes a medium access control protocol for integrated voice and data services in slotted CDMA systems. The proposed protocol, which is named as RCSSMA (Reservation Code and Status Sensing Multiple Access), adopts a code reservation and status sensing schemes. RCSSMA protocol gives higher access priority to the voice traffic than data traffic for reducing the packet dr...

119 Food for Thought ... Systems Toxicology Thomas Hartung 1, Erwin van Vliet 2, Joanna Jaworska 3, Leo Bonilla 4, Nigel Skinner 4, and Russell Thomas 5 Johns Hopkins University, Bloomberg School of Public Health, Center for Alternatives to Animal testing (CAAt), Baltimore, USA and University of Konstanz, CAAt-europe, Germany; Hospital Clinic – Universitat de Barcelona, Department of Maternal-F...

I multimedia and hypermedia systems, the importance of mobile links to a stationary infrastructure and of mobile data terminals is increasing. Current advances in hardware technology for hand-held terminals (for example, display size and resolution, processing capabilities, and power consumption) let multimedia systems be implemented in mobile environments. Nevertheless, to fully reach that goa...

Abstract: Here city logistics terminal is defined as the facility consisting of warehouse center, marketing center, freight detaching center, distributing center and the information center. It is a link of freight transport between transport terminal such as port, railway freight station and highway entrance and the retailing facilities. The purpose of this study is to optimize the size and spa...

The recent consumer-to-consumer (C2C) Internet auction boom at eBay, Yahoo, Amazon, and other sites has added new theoretical challenges to the science of auctions. This paper uses experiments with economically-motivated human subjects to measure the operational efficiency of decentralized Internet auction mechanisms as they compare to centralized double auction mechanisms. Subjects are recruit...