1 In August 2003, while many Europeans were heading to the beaches to mitigate the effects of the worst heat wave on record, José Eduardo Sampaio, the CEO of Casa XXI, was faced with another kind of heat. Cartão 21, the innovative payment system of Casa XXI that he had personally conceived and subcontracted, had dramatically failed on August 6 th during the high-visibility inauguration of Alval...

Dynamic Spectrum Access (DSA) allows unlicensed wireless devices to opportunistically access unoccupied licensed spectrum bands. DSA yields efficient spectrum utilization which can greatly improve wireless networking performance. In this paper, we advocate application-awareness to effectively manage the sideeffects of DSA that can offset its benefits by adversely impacting application QoS. Simp...

Christopher Potter (corresponding author) NASA Ames Research Center, Moffett Field, CA, USA Tel.: 650-604-6164 Fax: 650-604-468 E-mail: [email protected] John Shupe Peggy Gross Vanessa Genovese Steven Klooster California State University Monterey Bay, Seaside, CA, USA River discharge rates across all California’s watershed have been modeled using the NASA version of the Carnegie-Ames-Stanfo...

Objective To assess whether cervical spinal cord atrophy heralds the onset of progressive MS. Methods We studied 34 individuals with radiologically isolated syndrome (RIS) and 31 patients with relapsing-remitting MS (RRMS) age matched to 25 patients within a year of onset of secondary progressive MS (SPMS). Two raters independently measured (twice per rater) the cervical spinal cord average seg...

Recent psychophysical studies suggest that human listeners do not segregate concurrent sounds by grouping frequency regions that have a common interaural time difference (ITD). However, such an approach is adopted by most computational auditory scene analysis (CASA) systems that use binaural cues. Here, we propose a CASA system that separates a target speech signal from a noise interferer, but ...

By using informetric tools, we evaluated the contribution and impact of the open source computer-assisted sperm analysis (CASA) software on sperm studies, especially pertaining to fish. The article was cited 125 times between 2007 and 2014 in four publication types (articles, doctoral dissertations, master’s theses, and books). Among articles, the number of citations increased at rate of three ...

and forestry. To solve some of the problems in forestry and agriculture, the German Research Center for Artificial Intelligence and the Saarland Ministry of Economics founded the Cooperative Agents and Integrated Services for Logistic and Electronic Trading in Forestry and Agriculture (Casa) project. The Casa project focuses on developing an agentbased information and trading network (ITN). In ...

Software applications executing in highly dynamic environments are faced with the challenge of frequent and usually unpredictable changes in their execution environment. In order to cope with this challenge effectively, the applications need to adapt to these changes dynamically. CASA (Contract-based Adaptive Software Architecture) provides a framework for enabling dynamic adaptation of applica...

JIAC IV is a generic agent toolkit with an emphasis on the realisation of applications in the areas of telecommunications and electronic commerce. We motivate the need for open, scalable, and flexible systems and hence the advantages of agent technology in these areas. Then, we describe the basic architectural principles of CASA, which builds the structural and functional base of agents in JIAC...

Monitoring of precipitation using higher frequency radar systems such as X-band is becoming popular. At X-band frequency, weather radar signals are attenuated along their paths due to precipitation. A network-based reflectivity retrieval technique has been developed for the Adaptive Sensing of the Atmosphere (CASA) system, which is a radar network that can observe a weather event simultaneously...