90,296 research outputs found
Stan Alexander
No full text"TX13883 Stan Alexander 112 L.A.A. Regt. Batchelor + RAAF Airstrips. Darwin 1943 - 1945".TX13883 Stan Alexander. 112 Light Anti Aircraft Regiment. Batchelor + Royal Australian Air Force Airstrips. Darwin 1943 - 1945
Mid Cretaceous fossil forests of Alexander Island, Antarctica
No full textSpectacular fossil trees and shrubs are preserved within fossil soils in their original growth positions in mid Cretaceous rocks on Alexander Island, Antarctic Peninsula. These fossils indicate that diverse forest communities grew upon the floodplain areas of Alexander Island during the
Albian at a palaeolatitude of 69-75 ° S. The fossil forests are preserved within the fluvial sediments of the Triton Point Formation of the Fossil Bluff Group, which represents the infill of a fore-arc basin.
The fluvial environment matured from a braided river system, with frequent floods and unstable channel banks, to a more mature meandering river system with more stable floodplain areas. Low energy floods preserved plants that grew on the river channel banks in fine muds and silts. Catastrophic floods occurred rarely, possibly as a result of volcanic activity upon the magmatic arc 200 km away. These high-energy floods covered floodplain areas in coarse sands, entombing trees. Well-drained mollisols formed on emergent surfaces becoming rich and fertile and supporting diverse forest communities.
The flora within the forests occurred as well structured communities that occupied different parts of the river floodplain. Open-woodland forests dominated by araucarian conifers, ferns and shrubs, occupied stable areas of the floodplain characterised by low-energy floods. Disturbance
vegetation dominated by Taeniopteris, liverworts, angiosperms and ferns, occupied river channel banks where frequent floods provided fresh surfaces for these early colonising plants to flourish. Patch forest communities dominated by podocarp conifers, ginkgo trees, cycadophytes and ferns, grew on stable areas of the floodplain distal to the river channel. These mature climax forests were rarely disturbed by catastrophic floods.
Evidence from the palaeosols, sediments and fossil wood of Alexander Island suggest that the climate was warm, temperate, and semi-arid with seasonal precipitation and intermittent wet phases. In structure and composition the Alexander Island forest are very similar to the warm temperate rainforests of New Zealand which experience mean summer temperatures of 16-22 °C and mean winter temperatures of 3-8 ° C. This study and other palaeobotanical data suggests that the Alexander Island forests are likely to have grown under similar temperatures
The Cathedral of St Alexander Nevski in Sofia.
No full textPreviously in the University eprints HAIRST pilot service at http://eprints.st-andrews.ac.uk/archive/00000393/Article 4 of 6 in an issue devoted to the visual culture of South Eastern EuropeBuilt to celebrate the liberation of Bulgaria from centuries of Ottoman domination, the Cathedral of St. Alexander Nevski in Sofia has aroused only scant interest among art historians both inside and outside the country. In recent years, the general disinterest surrounding this monument can be ascribed to the political climate in Bulgaria after the Second World War; for almost half a century the militant atheism of the Communist regime stifled the religious feelings of the Bulgarian people, forcing believers underground. Consequently, under pressure from the regime, religious works of art and places of worship fell into neglect.
In view of this void, the aim of my research was to document as completely as possible all the various aspects of the Cathedral of St. Alexander Nevski. I then traced the history of Bulgaria, starting from the Ottoman conquest and focusing particularly on the period of the Bulgarian Renaissance, which led the country, with the help of Russia, to freedom from the Turkish Empire and then to independence. I hope that this study will shed a glimmer of light on this splendid building and help to stimulate interest in Bulgaria's artistic heritage.Postprin
2636 N. Starr Road, "Alexander" home
No full textRealtor's brochure on site, 2012; More than 2,500 Alexander homes were built in Palm Springs during an approximately ten year span. At first, Alexander homes were designed for sheer production efficiency, but in 1957, Dan Palmer and William Krisel, of Palmer & Krisel, came to Palm Springs in conjunction with the Alexander Construction Company with a new concept: to build stylish modern-style tract homes with clean lines and simple elegance that were affordable and even more efficiently producible. Exposed roof planks accented adjacent ceiling beams with decorative as well as structural value. Three-quarter walls divided rooms, allowing in an abundance of light while making construction (and associated costs) of a full, framed wall unnecessary. Eliminating molding and trim created a clean, contemporary new look, and at the same time saved time and money. Repeated use of the same floor plan within a development ensured savings in construction and materials. But, in a brilliant stroke, Krisel oriented and embellished each house differently on its site, making Alexander developments look like a collection of individualized custom homes. This is a 3 bed, 2 bath house in Racquet Club East. Source: Wikipedia; http://en.wikipedia.org/wiki/Main_Page (accessed 7/21/2014
2560 N. Starr Road, "Alexander" home
No full textDetail of support beam for balcony on north facade; More than 2,500 Alexander homes were built in Palm Springs during an approximately ten year span. At first, Alexander homes were designed for sheer production efficiency, but in 1957, Dan Palmer and William Krisel, of Palmer & Krisel, came to Palm Springs in conjunction with the Alexander Construction Company with a new concept: to build stylish modern-style tract homes with clean lines and simple elegance that were affordable and even more efficiently producible. Exposed roof planks accented adjacent ceiling beams with decorative as well as structural value. Three-quarter walls divided rooms, allowing in an abundance of light while making construction (and associated costs) of a full, framed wall unnecessary. Eliminating molding and trim created a clean, contemporary new look, and at the same time saved time and money. Repeated use of the same floor plan within a development ensured savings in construction and materials. But, in a brilliant stroke, Krisel oriented and embellished each house differently on its site, making Alexander developments look like a collection of individualized custom homes. This is a 3 bed, 2 bath house in the Racquet Club Estates. Source: Wikipedia; http://en.wikipedia.org/wiki/Main_Page (accessed 7/21/2014
Coherent atomic manipulation and cooling using composite optical pulse sequences
No full textThe laser cooling of atoms to ultracold temperatures has propelled many groundbreaking advances in fundamental research and precision measurement, through such applications as quantum simulators and interferometric sensors. Laser cooling remains, however, highly species-selective, and techniques for its application to molecules are still in their infancy.This thesis broadly concerns the development of laser cooling schemes, based on sequences of coherent optical pulses, which can in principle be applied to a wide range of species. We describe a cooling scheme, in which a velocity-selective impulse analogous to that in Doppler cooling is generated by a light-pulse Ramsey interferometer, and present a proof-of-concept demonstration of the scheme using ultracold rubidium-85 atoms as a test-bed. We realise an interferometer for the atoms, as they are in free-fall after release from a magneto-optical trap, by inducing stimulated Raman transitions between their ground hyperfine states. We provide a comprehensive characterisation of these Raman light-pulse interferometer optics, where particular attention is paid to light shift effects.Raman pulses, and indeed coherent operations in any quantum control system, unavoidably suffer from systematic errors in the control field intensity and frequency, and these lead to reductions in pulse fidelity and readout contrast. In parallel to the work on interferometric cooling in this thesis, we report our preliminary investigations into composite pulses, whereby 'naive' single pulses are replaced by sequences of rotations with tailored durations and phases, for improving pulse fidelity in the presence of inhomogeneities. We find that composite pulses can indeed be highly effective in our cold atom system, and propose that their application in such devices as interferometric sensors is a promising prospect
Dynamics of finite-sized light spheres in turbulence
No full textWe report experimental results on the Lagrangian dynamics of finite-size light particles in turbulence. Using an orthogonal camera setup and 3D particle tracking, we study the velocity and acceleration statistics of rigid light spheres in a water tunnel with nearly homogeneous and isotropic turbulence. The Reynolds number (ReY) is varied from 180 to 300, and the study covers a range of size ratios (4 < D/η < 16) for marginally light spheres. We find that the normalised acceleration PDF decreases in intermittency with increasing size ratio - in qualitative agreement with the predictions of the Faxén corrected model. We also present preliminary results on the rotational dynamics of large light spheres in turbulence
Interview with Dr. Michael C. Keith (Communication Department), author Of Night and Light: Stories (Blue Mustang Press, 2012)
No full textDr. Keith's latest book is a collection of shorts stories entitled Of Night and Light. This book collects more than 40 short stories covering all manner of speculative fiction, humor, and even a bit of romance. As the title notes, there are both light and dark themes within the book, though the author readily admits he leans a bit darker at times.Title supplied by cataloger
Stereoscopic Clustered Light Shading
No full textReal-time realistic rendering requires the evaluation of the influence of many light sources. In case of dynamic geometry or light sources, this evaluation must be performed every frame. In this thesis I present enclosed clustering: an adaptation of Clustered Light Shading to stereoscopic rendering which cuts the per-eye cost of light assignment in half. To achieve this, clustering is performed once with a clustering camera frustum that encloses both of the eye camera frusta. Decoupling of the clustering camera from the rendering camera gives way to two alternative ways of constructing the clustering: orthographic clustering and displaced perspective clustering. Orthographic clustering uses a uniform world-space grid and has been traditionally dismissed. Displaced perspective clustering uses a decoupled clustering camera to reduce the number of small clusters near the camera. These techniques can be applied to both monoscopic and stereoscopic rendering
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