3,145 research outputs found
R.J. Sommers
Get PDFThe single-spaced paragraph on the “About the Author” page of R.J. Sommers’ latest novel says she lives in a one-story house on the edge of a city. It says she is renowned for writing relatable characters and compelling relationships. It says nothing about her own friends.
Gazing from a photo at the top of the page, R.J. Sommers appears to point a camera toward her readers..
Zernike Basis to Cartesian Transformations
Get PDFThe radial polynomials of the 2D (circular) and 3D (spherical) Zernike functions are tabulated as powers of the radial distance. The reciprocal tabulation of powers of the radial distance in series of radial polynomials is also given, based on projections that take advantage of the orthogonality of the polynomials over the unit interval. They play a role in the expansion of products of the polynomials into sums, which is demonstrated by some examples. Multiplication of the polynomials by the angular bases (azimuth, polar angle) defines the Zernike functions, for which we derive transformations to and from the Cartesian coordinate system centered at the middle of the circle or sphere
A Direct Measurement of Atmospheric Dispersion in N-band Spectra: Implications for Mid-IR Systems on ELTs
No full textThis paper is modified from [A.J. Skemer, P.M. Hinz, W.F. Hoffmann, L.M. Close, S. Kendrew, R.J. Mathar, R. Stuik, T.P.
Greene, C.E. Woodward, M.S. Kelley, PASP 121, 897 (2009)]. Adaptive optics will almost completely remove the effects of
atmospheric turbulence at 10µm on the Extremely Large Telescope (ELT) generation of telescopes.
In this paper, we observationally confirm that the next most important limitation to image
quality is atmospheric dispersion, rather than telescope diffraction. By using the 6.5 meter
MMT with its unique mid-IR adaptive optics system, we measure atmospheric dispersion in the
N-band with the newly commissioned spectroscopic mode on MIRAC4BLINC. Our results indicate that
atmospheric dispersion is generally linear in the N-band, although there is some residual
curvature. We compare our measurements to theory, and make predictions for ELT Strehls and
image FHWM with and without an atmospheric dispersion corrector (ADC). We find that for many
mid-IR applications, an ADC will be necessary on ELTs
Spherical Trigonometry of the Projected Baseline Angle
No full textThe basic vector geometry of a stellar interferometer with two telescopes is defined by the right triangle of (i) the baseline vector between the telescopes, of (ii) the delay vector which points to the star, and of (iii) the projected baseline vector in the plane of the wavefront of the stellar light. The plane of this triangle intersects the celestial sphere at the position of the star; the intersection is a circular line segment. The interferometric angular resolution is high (diffraction limited to the ratio of the wavelength over the projected baseline length) in the two directions along thisline segment, and low (diffraction limited to the ratio of thewavelength over the telescope diameter) perpendicular to these. Theposition angle of these characteristic directions in the sky iscalculated here, given either local horizontal coordinates, orcelestial equatorial coordinates
Author Co-Citation Analysis (ACA): a powerful tool for representing implicit knowledge of scholar knowledge workers
Get PDFIn the last decade, knowledge has emerged as one of the most important and valuable organizational assets. Gradually this importance caused to emergence of new discipline entitled ―knowledge management‖. However one of the major challenges of knowledge management is conversion implicit or tacit knowledge to explicit knowledge. Thus Making knowledge visible so that it can be better accessed, discussed, valued or generally managed is a long-standing objective in knowledge management. Accordingly in this paper author co- citation analysis (ACA) will be proposed as an efficient technique of knowledge visualization in academia (Scholar knowledge workers)
Report on industrial attachment with R.J. Crocker Consultants Pte Ltd
No full textThis report documents the undertaking of the author’s six months of industrial attachment. It was the industrial attachment that gave him the opportunity to discover the innovative skills and expertise from his fellow colleagues working the organization. Throughout the attachment, the author had learnt a great deal from various trained and experienced engineers. He had been exposed to a variety of training namely (1) reinforcement concrete design, (2) steel and connection design, (3) modelling structures for design and analysis using software, (4) visual inspections for buildings, (5) preparing tender documents, (6) drawing, presentation and attending and (7) handling online submissions for building inspections, structural plans, design calculations, etc. Furthermore, by attending project meetings, preparing materials for presentations, tendering documents and drawings to privatized companies and public sectors all bestowed the author a concrete understanding of the type and quality of work required of and produced by a qualified engineer. Without the industrial attachment, all these practical skills and knowledge might not have been attainable by learning in the university alone. It was overall a fruitful experience
Information Circular 12. Selected Bibliography of Cuyuna Range Geology, Mining and Metallurgy
No full textThis work is an extension of a bibliography prepared by the author as part of a final report submitted to the U.S. Bureau of Mines for grant # G026/t002 entitled "Manganese-bearing ores of the Cuyuna iron range, east-central Minnesota, Phase 1". This bibliography, though directed primarily towards the geologic and mining literature of the Cuyuna range, does include the major works on the metallurgical aspects of the Cuyuna ores. For historical interest the very earliest publications are included. This list of abbreviations given on pages 2-4 are consistent with those from the "Bibliography and Index of Geology".Beltrame, R.J.. (1977). Information Circular 12. Selected Bibliography of Cuyuna Range Geology, Mining and Metallurgy. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/59304
The Late Fifteenth-Century Utrecht Chronicle of the Teutonic Order: Manuscripts, Sources, and Authorship
Get PDFBy studying the Utrecht Chronicle of the Teutonic Order, also known as the ‘Jüngere Hochmeisterchronik’, I aimed to examine the circulation of (historical) knowledge within the Teutonic Order at the end of the fifteenth century. Only decades earlier, the order suffered major defeats in Prussia and its former heathen enemies had become Christians. It has been the underlying aim of this study to gain an understanding of the introduction of the order’s tradition of history writing to the Dutch Low Countries, far removed from the traditional production centres in Prussia and Livonia, as well as the effects this change of location, and accompanying change of perspective had on the content and purpose of such historical production within the order. In this dissertation, I have been able to establish that the chronicle was written in Utrecht, in various phases from 1480 to 1491 and possibly the mid-1490s, by the Utrecht land commander Johan van Drongelen and his personal secretary. The material product of their collaboration is a manuscript kept in Vienna, which can now be classified as an author’s copy. I have also shown in detail how the text was constructed, and that the author(s) managed to collect a wide selection of sources – including from locations hundreds of kilometres away from the city of Utrecht. We have therefore come much closer to understanding the specific circumstances under which the chronicle was written, as well as the preconditions of that environment which made it possible to undertake such an ambitious project
The potential affordances of enterprise wikis for creating community in research networks
Get PDFIn this paper, we describe some of the affordances, (the specific enabling features or characteristics), of an enterprise wiki to meet the needs of a developing community of practice. The Social Innovation Network (SInet) is a nascent research network that spans the social sciences, education and commerce at the University of Wollongong. It will use the enterprise wiki software Confluence to assist in the development of communities of practice across its groups and subgroups. This paper, describes some of the features of the software and how it might be used to perform some of the common activities identified by Wenger (nd) as contributing to the development of community
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