Ampullary neoplasms are one of the causes of obstructive jaundice. Endoscopic retrograde cholangiopancreatography (ERCP) is useful procedure for diagnosing and tissue sampling of ampullary neoplasms. Ampullectomy by resecting entire ampulla provides whole lesion for pathologic evaluation and also is appropriate for real pathologic staging for further management decision but ampullectomy conside...

Semi-analytical calculations for the two-body relaxation in softened potentials are presented and compared with N-body simulations. With respect to a Keplerian potential the increase of the relaxation time in the modified potentials is generally less than one order of magnitude, typically between 2 and 5, if the softening length is of the order of the mean interparticle distance. A comparison b...

This paper reports theoretical and empirical investigations on the use of quasi-Newton methods to minimize the Optimal Bellman Residual (OBR) of zero-sum two-player Markov Games. First, it reveals that state-of-the-art algorithms can be derived by the direct application of Newton’s method to different norms of the OBR. More precisely, when applied to the norm of the OBR, Newton’s method results...

7 This paper critiques the notion of responsible management of information systems by pointing out the intrinsic contradiction inherent in the idea of managing morality and ethics in information systems. The paper, being part of the tradition of critical research in IS, uses the example of managing digital divides to argue that a traditional view of management (here called heroic management) le...

Direct simulations of spherical particle motion in Bingham liquids Prashant, J. J. Derksen Chemical & Materials Engineering Department, University of Alberta, Edmonton, Alberta, T6G 2G6 Canada Submitted to Computers & Chemical Engineering, October 2009 Accepted: September 2010 Abstract The present work deals with the development of a direct simulation strategy for solving the motion of spherica...

A two dimensional lattice gas model with ”core-softened” potential is investigated. Two liquid phases and density anomaly are found. The demixing phase transition between the two liquid phases end at a tricritical point that is also the terminus of a critical line. The density anomaly is related to this continuous line.