44 research outputs found
Signature properties of water:Their molecular electronic origins
Water challenges our fundamental understanding of emergent materials properties from a molecular perspective. It exhibits a uniquely rich phenomenology including dramatic variations in behavior over the wide temperature range of the liquid into waterâs crystalline phases and amorphous states. We show that many-body responses arising from waterâs electronic structure are essential mechanisms harnessed by the molecule to encode for the distinguishing features of its condensed states. We treat the complete set of these many-body responses nonperturbatively within a coarse-grained electronic structure derived exclusively from single-molecule properties. Such a âstrong couplingâ approach generates interaction terms of all symmetries to all orders, thereby enabling unique transferability to diverse local environments such as those encountered along the coexistence curve. The symmetries of local motifs that can potentially emerge are not known a priori. Consequently, electronic responses unfiltered by artificial truncation are then required to embody the terms that tip the balance to the correct set of structures. Therefore, our fully responsive molecular model produces, a simple, accurate, and intuitive picture of waterâs complexity and its molecular origin, predicting waterâs signature physical properties from ice, through liquidâvapor coexistence, to the critical point
Complementing the European earth observation and geographic information body of knowledge with a businessâoriented perspective
A body of knowledge (BoK) is an inventory of knowledge or concepts of a domain that serves as a reference vocabulary for various purposes, such as the development of curricula, the preparation of job descriptions, and the description of occupational profiles. To fulfill its purpose, a BoK needs to be upâtoâdate and ideally widely accepted by academia as well as the private and public sectors. This article presents the initiative taken in the Earth observation and geographic information (EO*GI) domain to provide a current, comprehensive educationâ and businessâoriented EO*GI BoK called EO4GEO BoK. In particular, an approach to strengthen the businessâoriented perspective in the EO4GEO BoK is presented. This approach is based on the analysis of professional tasks and the mapping of these tasks to concepts and skills contained in the BoK. A critical reflection of the proposed approach that is based on the experiences gained during a workshop complements this article
Acquisition of a Distributed Computation and Immersive Visualization Environment for Complex Systems - Scientific Applications on Arrays of Multiprocessors (SCAAMP)
NSF Award ID: CDA-9601632
9/15/1996-8/31/199