2,340 research outputs found
C.J. Koch (1932 - )
No full textBiographical, bibliographical, and literary historiography of Australian author C.J. Koch
Hierarchically Structured Allotropes of Phosphorus from Data-Driven Exploration.
No full textThe discovery of materials is increasingly guided by quantum-mechanical crystal-structure prediction, but the structural complexity in bulk and nanoscale materials remains a bottleneck. Here we demonstrate how data-driven approaches can vastly accelerate the search for complex structures, combining a machine-learning (ML) model for the potential-energy surface with efficient, fragment-based searching. We use the characteristic building units observed in Hittorf's and fibrous phosphorus to seed stochastic ("random") structure searches over hundreds of thousands of runs. Our study identifies a family of hierarchically structured allotropes based on a P8 cage as principal building unit, including one-dimensional (1D) single and double helix structures, nanowires, and two-dimensional (2D) phosphorene allotropes with square-lattice and kagome topologies. These findings yield new insight into the intriguingly diverse structural chemistry of phosphorus, and they provide an example for how ML methods may, in the long run, be expected to accelerate the discovery of hierarchical nanostructures
Accurate kinetic energy evaluation in electronic structure calculations with localized functions on real space grids
No full textWe present a method for calculating the kinetic energy of localized functions represented on a regular real space grid. This method uses fast Fourier transforms applied to restricted regions commensurate with the simulation cell and is applicable to grids of any symmetry. In the limit of large systems it scales linearly with system size. Comparison with the finite difference approach shows that our method offers significant improvements in accuracy without loss of efficiency
Audio Interview with Mr. C.J. Rayner Whiteley
No full textAudio - Mr. Whiteley recounts the story of delivering the message of the flood of 1904. He took seventeen hours by horse to travel from Perryvale to Edmonton. Billy Loutit took the same message by foot arriving in Edmonton about the same time. Mr. Whiteley discusses early settlers, farming, homesteading and businesses. He has many anecdotes about life and people living in Athabasca at the start of the twentieth century. He freighted for ten years with the Hudson's Bay Company and also discusses early farming prices and technology extensivelyInformative Interview of Mr. C.J. Raymor Whitely In April 1961 on a Reel to Reel tape recorded onto cassette by R. Tanhas March 198
Data-driven learning and prediction of inorganic crystal structures.
No full textCrystal structure prediction algorithms, including ab initio random structure searching (AIRSS), are intrinsically limited by the huge computational cost of the underlying quantum-mechanical methods. We have recently shown that a novel class of machine learning (ML) based interatomic potentials can provide a way out: by performing a high-dimensional fit to the ab initio energy landscape, these potentials reach comparable accuracy but are orders of magnitude faster. In this paper, we develop our approach, dubbed Gaussian approximation potential-based random structure searching (GAP-RSS), towards a more general tool for exploring configuration spaces and predicting structures. We present a GAP-RSS interatomic potential model for elemental phosphorus, which identifies and correctly "learns" the orthorhombic black phosphorus (A17) structure without prior knowledge of any crystalline allotropes. Using the tubular structure of fibrous phosphorus as an example, we then discuss the limits of free searching, and discuss a possible way forward that combines a recently proposed fragment analysis with GAP-RSS. Examples of possible tubular (1D) and extended (3D) hypothetical allotropes of phosphorus as found by GAP-RSS are discussed. We believe that in the future, ML potentials could become versatile and routine computational tools for materials discovery and design
Specialty farming in Idaho: Selecting a site
No full textBulletin no. 744 Moscow, Idaho :University of Idaho, College of Agriculture, Cooperative Extension System, 1992-10-01. Author(s): Barney, D.L.; Finnerty, T.L.; Mancuso, C.J
The Actors' Perceptions and Expectations of their Roles in BIM-based Collaboration
No full textThe inter-organisational collaboration with Building Information Modelling (BIM) is one of the hottest topics in construction sector nowadays. The implementation of BIM is a complex inter-organisational process, and the sharing of information among numerous actors from multi-disciplinary backgrounds may affect the actors’ role perception and performance. This study offers insights into the BIM roles of various actors by analysing a BIM-based project carried out by an integrated partnership across many tiers. The analysis identified inconsistencies between the actors' perceptions and their partners’ expectations of their BIM roles. Inconsistencies in BIM roles were more related to soft rather than hard (domain- or technical) skills. Mismatches were found in the architect's role, as it was deemed necessary to be more domain- and BIM-related, contrary to their perceptions. Likewise, the suppliers' role called for an enhanced BIM orientation. The paper concludes with set of suggestions for increasing the joint responsibility and supporting the multi-actor collaboration.Design & Construction ManagementSustainable Housing Transformatio
Real estate tax credits and other incentives for investing in historic property in the United States
No full textThis article reviews different incentives provided in the USA and makes comparisons to incentives offered in Belgium, Denmark, France, Germany, Ireland, The Netherlands and the United Kingdom. Together with outputs 1& 2, this article was cited in House of Commons: ODPM: Housing, Planning, Local Government and the Regions Committee, Eleventh Report of Session 2003-4 (Volume I) into “The Role of Historic buildings in Urban Regeneration” (HC 47-I, EV29 published on 29 July 2004)
Strange Fellah! Review of Philip Butterss, An Unsentimental Bloke: The Life and Work of C.J. Dennis
No full textC.J. Dennis, author of The Songs of a Sentimental Bloke (1915), was once considered the unofficial poet laureate of Australia. Throughout his career he was erroneously conflated with his famous character 'the Bloke' in the public imagination. 'Many have imagined him as a sentimental bloke', argues Philip Butterss, 'an easygoing fellow with a naïve and slightly romantic view of the world'(1). Since three previous biographical works have the word 'sentimental' in the title, Butterss' decision to add the 'un' to 'sentimental' immediately signals his intention to examine the darker side of Dennis
) Corresponding author.
No full textwww.elsevier.comrlocatergeoderma 3D reconstruction and quantification of macropores using X-ray computed tomography and image analysis A. Pierret a,) , Y. Capowiez b, L. Belzunces b, C.J. Moran
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