In the framework of the Gross-Pitaevskii mean field approach, it is shown that the supersonic flow of a Bose-Einstein condensate can support a new type of pattern--an oblique dark soliton. The corresponding exact solution of the Gross-Pitaevskii equation is obtained. It is demonstrated by numerical simulations that oblique solitons can be generated by an obstacle inserted into the flow.

The Audiovisual Institute (http://www.iua.upf.es) is a research center of the Pompeu Fabra University, (http://www.upf.es) located in Barcelona and devoted to new media technologies. Apart from its main research activities, the Institute also promotes the production of experimental media art, being Music one its main focuses. In this report we present the main music research projects being carr...

In this article we introduce some new type of sequence spaces

Although recent research suggests that the selective nature of new media helps foster issue specialists, little empirical evidence has been documented, mostly due to theoretical and methodological limitations. Extending the concept of issue publics, the present study proposes a method to estimate the degree to which an individual is a specialistor a generalist-type citizen. Applying the method ...

Informal economy (IE) is second only to the US economy in size; however, the role of ICT in IE remains largely unexplored. In this study, we conduct an empirical analysis of the role of ICT in IE growth. With PLS analysis involving more than 100 nations, we show that ICT products and software piracy may play important roles in IE growth, that impact of ICT and other determinants on IE growth re...

We study the propagation of noninteracting polariton wave packets. We show how two qualitatively different concepts of mass that arise from the peculiar polariton dispersion lead to a new type of particlelike object from noninteracting fields-much like self-accelerating beams-shaped by the Rabi coupling out of Gaussian initial states. A divergence and change of sign of the diffusive mass result...

This paper reviews the significant progress in “agency theory” (i.e., the economic theory of incentives) during the 1990s, with a special focus on applications to supply transactions. I emphasize six recent models, in three pairs: (1) new foundations for the theory of incentive contracts, (2) new directions in incentive theory, and (3) new applications to supply transactions. By reviewing these...

Follow this and additional works at: http://scholarship.law.upenn.edu/faculty_scholarship Part of the Antitrust and Trade Regulation Commons, Business Law, Public Responsibility, and Ethics Commons, Communications Law Commons, Communication Technology and New Media Commons, Law and Economics Commons, Science and Technology Commons, Science and Technology Policy Commons, Science and Technology S...