This paper examines the investment behaviour of an incumbent and a po tential entrant that are competing for a patent with a stochastic payo We incorporate asymmetric information into the model by assuming that the chal lenger has complete information about the incumbent whereas the latter does not know the precise value of its opponent s investment cost We nd that even a small probability of b...

As the world becomes more interdependent and computing growsmore collaborative, there is a need for new abstractions and tools tohelp users work together. We recently introduced entangled queries– a mechanism for information exchange between database queries[6]. In this paper, we introduce entangled transactions, units ofwork similar to traditional transactions that however ...

An adaptive probe based optimization technique is developed and demonstrated in the context of an Internet based distributed database environment More and more common are database sys tems which are distributed across servers communicating via the Internet where a query at a given site might require data from remote sites Optimizing the response time of such queries is a chal lenging task due t...

Objective: Joint data analysis is a key requirement in medical research networks. Data are available in heterogeneous formats at each network partner and their harmoni zation is often rather complex. The objective of our paper is to provide a generic approach for the harmonization process in research networks. We applied the process when harmonizing data from three sites for the Lung Cancer Phe...

a totall of 500 early permian samples from the chal-i-sheh formation in the zagros basin were examined palynollogically in order to determine the stratigraphical age of the formation and to assess the palaeogeopaphicd relatianships of this basin to the southern and northern hemispheres during the early permian. fifty-eight taxa were recorded including 46 pollen, 10 spore and 2 acritarch species...

anti-microbial effects of the lactic acid bacteria have been studied and proved in various investigations. this investigation aimed to study the anti-yeast effect of two isolated lactic acid bacteria species from “chal” (a product from yogurt) as biological preservatives in doogh. to do so, anti-yeast activity of l. brevis and e. faecium against saccharomyces cerevisiae, kluyveromyces. marxianu...

Four transplantable mammary tumors, three (66, 410, and 168cl) isolated from a spontaneously occurring strain BALB/ cfCSH mammary tumor and one (D2) arising from a BALB/c hyperplastic alveolar nodule were found to grow better in mammary fatpads than at s.c. sites. Furthermore, tumor growth was better (p < 0.05) in intact mammary glands than in cleared mammary fatpads for the D2, 410, and 66 tum...

Making sense of the mind is the human odys sey. Today, the cog ni tive sci ences pro vide the vehi cles and équipage. As do all cul tur ally shaped activ i ties, they man i fest crys tal lized gen er al iza tions and ideo log i cal leg a cies, many of which go unques tioned for cen tu ries. From time to time, these ide ol o gies are suc cess fully chal lenged, gen er at ing revi sions and new f...

I n 1994, 38% of hospi ta l s su rveyed ind ica t ed plans for future workforce cuts. Twenty-seven percen t of these hospi ta l s i nd ica t ed they are t a rge t ing nurses, compared wi th only 19% in 1993.1 Professional nurs ing staff cuts are not just a resul t of dec reased need or inc reased efficiency: 50% of the nurses whose jobs are e l imina ted are be ing rep laced wi th un l i censed...