1. The variation of threshold with field area was measured in fields homogeneous in rod-cone composition. At 15 degrees above the fovea, an increase in field diameter from 1 degrees to 5 degrees reduces the threshold sevenfold, at 25 degrees above the fovea tenfold. 2. These changes are shown to follow qualitatively from simple statistical properties of the retinal mosaic. Analytic treatment le...

Recently, low-power wireless networking standards like 802.15.1 (Bluetooth) have driven consumer interest in personal area networks (PANs). These networks are designed for inexpensively connecting low-power devices located within 1 m to 100 m of each other. In this paper, we discuss recent evolutions to the Bluetooth standard, as well as two emerging PAN standards: 802.15.4/ZigBee, and Ultra-Wi...

Cartesian routing is a fast packet routing mechanism intended for geographic addresses and can effectively accelerate the packet routing process within a local or metropolitan environment. The wide area Cartesian routing described in this paper is an extension of the Cartesian routing algorithms designed to make the exchange of internetwork packets between geographical regions possible. It also...

The Bay Area Photovoltaic Consortium (BAPVC) is conceived to create a vibrant forum for interaction among Photovoltaic (PV) industry and academic experts to address the critical challenges in converting the U.S. leadership in PV R&D into leadership in PV Manufacturing. The U.S. faces substantial challenges in building such a PV manufacturing base as many of our competitors benefit from fewer ma...

Chest NF Ray, M Thamer, B Fadillioglu and PJ Gergen analysis Race, income, urbanicity, and asthma hospitalization in California: a small area This information is current as of May 24, 2006 http://www.chestjournal.org the World Wide Web at: The online version of this article, along with updated information and services, is located on without the prior written permission of the copyright holder. ...

Boundary labeling is a relatively new labeling method. It can be useful in automating the production of technical drawings and medical maps, where it is common to explain certain parts of the drawing with text labels, arranged on its boundary so that other parts of the drawing are not obscured. In boundary labeling, we are given a rectangle R which encloses a set of n sites. Each site si is ass...

In this short paper we describe a Wide Area Audio Synchronisation demonstration using the Quality of Service (QoS) facilities of the Nemesis operating system. The Nemesis operating system is a result of the ESPRIT funded Pegasus I research project. A stereo audio stream is split with each channel being input to one of two distinct network digitisation devices; one of the resulting streams is se...

Calculating and categorizing the similarity of curves is a fundamental problem which has generated much recent interest. However, to date there are no implementations of these algorithms for curves on surfaces with provable guarantees on the quality of the measure. In this paper, we present a similarity measure for any two cycles that are homologous, where we calculate the minimum area of any h...