2,254 research outputs found
Geology of the Selk crater region on Titan from Cassini VIMS observations
No full textInternational audienceObservations of Titan obtained by the Cassini Visual and Infrared Mapping Spectrometer (VIMS) have revealed Selk crater, a geologically young, bright-rimmed, impact crater located similar to 800 km north-northwest of the Huygens landing site. The crater rim-crest diameter is 90 km; its floor diameter is similar to 60 km. A central pit/peak, 20-30 km in diameter, is seen; the ratio of the size of this feature to the crater diameter is consistent with similarly sized craters on Ganymede and Callisto, all of which are dome craters. The VIMS data, unfortunately, are not of sufficient resolution to detect such a dome. The inner rim of Selk crater is fluted, probably by eolian erosion, while the outer flank and presumed ejecta blanket appear dissected by drainages (particularly to the east), likely the result of fluvial erosion. Terracing is observed on the northern and western walls of Selk crater within a 10-15 km wide terrace zone identified in VIMS data; the terrace zone is bright in SAR data, consistent with it being a rough surface. The terrace zone is slightly wider than those observed on Ganymede and Callisto and may reflect differences in thermal structure and/or composition of the lithosphere. The polygonal appearance of the crater likely results from two preexisting planes of weakness (oriented at azimuths of 21 degrees and 122 degrees east of north). A unit of generally bright terrain that exhibits similar infrared-color variation and contrast to Selk crater extends east-southeast from the crater several hundred kilometers. We informally refer to this terrain as the Selk "bench." Both Selk and the bench are surrounded by the infrared-dark Belet dune field. Hypotheses for the genesis of the optically bright terrain of the bench include: wind shadowing in the lee of Selk crater preventing the encroachment of dunes, impact-induced cryovolcanism, flow of a fluidized-ejecta blanket (similar to the bright crater outflows observed on Venus), and erosion of a streamlined upland formed in the lee of Selk crater by fluid flow. Vestigial circular outlines in this feature just east of Selk's ejecta blanket suggest that this might be a remnant of an ancient, cratered crust. Evidently the southern margin of the feature has sufficient relief to prevent the encroachment of dunes from the Belet dune field. We conclude that this feature either represents a relatively high-viscosity, fluidizedejecta flow (a class intermediate to ejecta blankets and long venusian-style ejecta flows) or a streamlined upland remnant that formed downstream from the crater by erosive fluid flow from the west-northwest
Portia in Primetime: Women Lawyers, Television, and L.A. Law
No full textThe following paper was written in March 1989, when L.A. Law was still in its third season and the author was in her last year at Harvard Law School. The analysis is based on events and characters prior to April 1, 1989. An unedited version of the paper is on file at Harvard Law School. The Epilogue included here updates the author\u27s review of L.A. Law through March 15, 1990
Eenige beschouwingen over de toekomst van ons technisch hoger onderwijs
No full textRede, uitgesproken op den Gedenkdag der Technische Hoogeschool, 8 Januari 1923, door den rector-magnificus Prof. L.A. van Royen.Delft University of Technolog
L.A. Tabulae ad Astra
No full textL.A.: Tabulae ad Astra (Los Angeles: Maps to the Stars) is a series of prints integrating portions of street maps of Los Angeles with gestural lines, impromptu marks from testing pen nibs, and cutting lines on boards—all unwittingly produced in the artist’s studio while working on other projects. The combined layers of intersecting and overlapping marks take on a surprising cartographic character that is reinforced by additional ancient map-like elements such as measurement grids, Latin phrases, beastiary, and scale markers. The resultant prints are also physically connected to the Los Angeles landscape, being printed on paper that was first soaked and stained in the waters of the L.A. River. Together Tabulae ad Astra plays on the constant tensions of control vs. freedom, order vs. complexity, safety vs. adventure, and city vs. wilderness.
Cover images: Design by Rebecca McKinney featuring Tab.10 and ephmera, by Dirk Hagner, courtesy of the artist. Artwork images by Dirk Hagner, courtesy of the artist. All other documentation photographs by Jeff Rau and Melanie Kim, from exhibition in the Earl & Virginia Green Art Gallery. L.A. Tabulae ad Astra (exhibition catalog), by Dirk Hagner Editor: Jeff Rau Contributing author: Karin Lanzoni Copyright © 2015 Earl & Virginia Green Art Gallery. Book design by Rebecca McKinney.https://digitalcommons.biola.edu/exhibit-catalogs/1012/thumbnail.jp
Portia in Primetime: Women Lawyers, Television, and L.A. Law
No full textThe following paper was written in March 1989, when L.A. Law was still in its third season and the author was in her last year at Harvard Law School. The analysis is based on events and characters prior to April 1, 1989. An unedited version of the paper is on file at Harvard Law School. The Epilogue included here updates the author's review of L.A. Law through March 15, 1990
A Look Back on the L.A. Riots: Black-Korean Relations
No full textWhat is the future of Black-Korean communities, post-L.A. riots? According to the author, there is an absence of Asian American issues in books devoted to race relations between ethnic minorities in the U.S. This thesis examines the Los Angeles riots, the histories of each group, and data from qualitative interviews. The author gives an objective and honest analysis of black-Korean relations despite racial, economic, and political biases. Methodology includes qualitative interviews of black respondents and Korean-American respondents
Inter institutional workshop on breakwaters
No full text(1) Functional requirements for Breakwaters - Prof. K.d' Angremond (2) Development of fishery harbors in India - Mr. K. Omprakash (3) Non-rubble Breakwaters and optimisation - Prof. K.d' Angremond (4) Wave energy caisson Breakwaters - Dr. S. Neelamani (5) Partially suspended porous wall Breakwaters - Dr. J.S. Mani (6) Case studies on stability of Breakwaters - Prof. V. Sundar (7) Introduction on Ennore coal port project - Mr. L.A. Mayboom (8) Design of Breakwaters for Ennore port - Mr. R. Haggie (9) Construction of Breakwaters for Ennore port - Mr. S. PearsonHydraulic EngineeringCivil Engineering and Geoscience
The Interchangeable Roles of Music and Technology in Computer-Supported Education
No full textScientific literature has frequently focused on the contribution offered by technology to support music education at various levels. A less investigated subject is the possibility of using multimedia and musical languages to encourage the acquisition of digital competences. In this vision, the roles of mediator and disciplinary goal– which in the context of computer-supported education are traditionally assigned to technology and music, respectively – are reversed. These concepts will be exemplified through applications which explore the relationship between music and technology from a new point of view, merging the two fields and making traditional roles more nuanced, thus encouraging the development of higher-order thinking skills. This paper summarizes the keynote lecture held by the author at the 4th International Conference on New Music Concepts – ICNMC 2017
Haunted narratives: politics, fiction and ghostwriting in Robert Harris’s "The Ghost"
No full textTaking as case study Robert Harris’s The Ghost, and focusing on the ‘poetics’ of ghostwriting and multiple, disseminated authorship, this article aims to highlight the crucial intersections between truth and fiction, authenticity and self-deception and the disembodying of public accountability from both the political subject and the literary author, made possible by the emergence of professional speechwriters and celebrity politicians. Suggestively embedded in this subtly intertextual novel are a number of ‘Gothic’ narrative structures and generic conventions, which range from the thematization of ghostwriting as a spectral activity, to the pervasive use of terms and images pertaining to the semantic areas of “haunting” and “the ghostly”, to neo-Gothic rewritings of landscapes and social milieus
Polymer multimode waveguide optical and electronic PCB manufacturing
No full textThe paper describes the research in the £1.3 million IeMRC Integrated Optical and Electronic Interconnect PCB Manufacturing (OPCB) Flagship Project in which 8 companies and 3 universities carry out collaborative research and which was formed and is technically led by the author. The consortium’s research is aimed at investigating a range of fabrication techniques, some established and some novel, for fabricating polymer multimode waveguides from several polymers, some formulations of which are being developed within the project. The challenge is to develop low cost waveguide manufacturing techniques compatible with commercial PCB manufacturing and to reduce their alignment cost. The project aims to take the first steps in making this hybrid optical waveguide and electrical copper track printed circuit board disruptive technology widely available by establishing and incorporating waveguide design rules into commercial PCB layout software and transferring the technology for fabricating such boards to a commercial PCB manufacturer. To focus the research the project is designing an optical waveguide backplane to tight realistic constraints, using commercial layout software with the new optical design rules, for a demonstrator into which 4 daughter cards are plugged, each carrying an aggregate of 80 Gb/s data so that each waveguide carries 10 Gb/s
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