We consider an environment where sellers compete over buyers. All sellers are a-priori identical and strategically signal buyers about the product they sell. In a setting motivated by on-line advertising in display ad exchanges, where firms use second price auctions, a firm’s strategy is a decision about its signaling scheme for a stream of goods (e.g. user impressions), and a buyer’s strategy ...

Confonnement aux plusieurs exemplaires provenant dans les anchialine et submarine grottes de Bahamas, Thetispelecaris remex n.g., n.sp. appartenant a la famille Hirsutiidae Sanders, Hessler et Gamer, 1985, est decrit. Ensuite une analyse detaille des caracteres morphologiques nous avons constate que 1'inclusion de la famille mentionee dans I'ordre Mictacea Bowman, Gamer, Hessler, Tliffe et Sand...

Three strategies designed to maximize attendance at educational sessions on chronic disease medication safety in older adults in rural areas were implemented sequentially and compared for cost-effectiveness: 1) existing community groups and events, 2) formal advertisement, and 3) employer-based outreach. Cost-effectiveness was measured by comparing overall cost per attendee recruited and number...

A wound and abscess clinic, held concurrently with a syringe exchange, provided economical treatment and aftercare for injection-associated soft tissue infections. During 20 two-hour clinic sessions, 173 treatment episodes were logged, and the visit cost was estimated at $5 per patient. Increased patient-clinician interactions provided opportunities beyond those afforded by the syringe exchange...

We present a parametric calculus for contract-based computing in distributed systems. By abstracting from the actual contract language, our calculus generalises both the contracts-as-processes and contracts-as-formulae paradigms. The calculus features primitives for advertising contracts, for reaching agreements, and for querying the fulfilment of contracts. Coordination among principals happen...

On the basis of the XSS (Cross Site Scripting) and Web Crawler techniques it is possible to go through the barriers of the Google Adsense advertising system by obtaining the validated links of the ads published on a website. Such method involves obtaining the source code built for the Google java applet for publishing and handling ads and for the final link retrieval. Once the links of the ads ...

In the present paper we prove the integrability (in the sense of existence of formal symmetry of infinite rank) for a class of (1+1)-dimensional evolution systems generalizing the triangular systems considered by Bakirov, Beukers, Sanders and Wang, and by Sanders and van der Kamp. The important consequence of this result is the existence of formal symmetry of infinite rank for “almost integrabl...