2,163 research outputs found
Researching ââGrand Challengesââ - A ââGrand Challengeââ
Attempts have been made to identify the grand challenges (GC) in quite different disciplines including Computer Science. These major problems should be solved within one or two generations and the solution would have great societal and economic impact. GCs are to be distinguished from the improvement of methods where the basic problem has already been solved (âemerging fieldsâ). Among other purposes, a common understanding of GCs within a community helps to focus efforts and resources and to create a climate of competition. With our study we try to gain an impression whether a certain consensus is within reach in Business and Information Systems Engineering (BISE; Wirtschaftsinformatik, WI) in the German speaking area. We used a multi-staged opinion survey among scientists and practitioners of WI and could establish an order of precedence concerning the most important GCs. At the top ranks the item âControl of systemic risks in global networksâ, followed by âHumanlike Information Systems in business contextâ, âDetermining the influences on the degree of automation und integrationâ, âInfluence of WI on the solution of semantic data processing problemsâ, and âOvercoming of communication barriers in inter-company integrationâ. We discuss drawbacks of the GC concept as well as attempts to improve the method. One main problem is to distinguish the terms âgrand challengesâ (GC), âemerging fieldsâ (EF), and ânew research goalsâ (NR)
Type II/F-theory Superpotentials with Several Deformations and N=1 Mirror Symmetry
We present a detailed study of D-brane superpotentials depending on several
open and closed-string deformations. The relative cohomology group associated
with the brane defines a generalized hypergeometric GKZ system which determines
the off-shell superpotential and its analytic properties under deformation.
Explicit expressions for the N=1 superpotential for families of type
II/F-theory compactifications are obtained for a list of multi-parameter
examples. Using the Hodge theoretic approach to open-string mirror symmetry, we
obtain new predictions for integral disc invariants in the A model instanton
expansion. We study the behavior of the brane vacua under extremal transitions
between different Calabi-Yau spaces and observe that the web of Calabi-Yau
vacua remains connected for a particular class of branes.Comment: 62 pages; v2: typos corrected and references adde
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