Introduction to Voigt's wind power plant

The design and operation of a 100 kilowatt wind driven generator are reported. Its high speed three-bladed turbine operates at a height of 50 meters. Blades are rigidly connected to the hub and turbine revolutions change linearly with wind velocity, maintaining a constant speed ratio of blade tip velocity to wind velocity over the full predetermined wind range. Three generators installed in the gondola generate either dc or ac current. Based on local wind conditions, the device has a maximum output of 720 kilowatts at a wind velocity of 16 meters per second. Total electrical capacity is 750 kilowatts, and power output per year is 2,135,000 kilowatt/hours

In Transit: Migration and Memory in the Writings of Martin Johnston and Dimitris Tsaloumas

In August 1964 Martin Johnston boarded the Ellinis in the port of Piraeus, destined for Sydney, Australia, bringing to an end his 14-year estrangement from the land of his birth. Johnston, who had lived abroad most of his life in England and Greece, would return as a literal migrant to his own country. It was a theme that would prove fecund and deeply allegorical for the then 17-year-old son of authors George Johnston and Charmian Clift, later manifesting in his poetic works such as In Transit: a sprawling 14-part paean to Johnston’s immutable sense of displacement. A little over a decade before, in 1952, Greek poet Dimitris Tsaloumas would complete the same metamorphic journey, fleeing his Dodecanese homeland and arriving in Melbourne, Australia where he would take up the uneasy mantle of Australia’s Hellenic poet in exile. Despite parabolic overtures of assimilation, paradoxical themes of longing and dislocation pockmark Tsaloumas’s vast canon, tethering an uneasy union between his two divergent worlds both ancient and contemporary; familiar and profoundly alien. This essay explores the lives and comparative themes of exile in the works of both Johnston and Tsaloumas—writers who both identified as Xenos, a Greek word that translates as both ‘guest’ and ‘stranger’—and investigates the often incorporeal, irredeemable and contradictory natures of nostalgia and belonging

New frequencies from planet Perth: Punk rock and Western Australia's sesquicentenary celebrations

Dislocated by both land and sea, Perth’s punk scene would nonetheless play a pivotal role in the development and global dissemination of punk rock in the 1970s. Set against the traditionalist context of Western Australia’s 150th anniversary celebrations in 1979, this study readdresses the birth of WA’s punk counterculture and its uneasy relationship with the State’s mainstream cultural narrative, as well as the genre’s enduring cultural legacy in Western Australia

Guided Proofreading of Automatic Segmentations for Connectomics

Automatic cell image segmentation methods in connectomics produce merge and split errors, which require correction through proofreading. Previous research has identified the visual search for these errors as the bottleneck in interactive proofreading. To aid error correction, we develop two classifiers that automatically recommend candidate merges and splits to the user. These classifiers use a convolutional neural network (CNN) that has been trained with errors in automatic segmentations against expert-labeled ground truth. Our classifiers detect potentially-erroneous regions by considering a large context region around a segmentation boundary. Corrections can then be performed by a user with yes/no decisions, which reduces variation of information 7.5x faster than previous proofreading methods. We also present a fully-automatic mode that uses a probability threshold to make merge/split decisions. Extensive experiments using the automatic approach and comparing performance of novice and expert users demonstrate that our method performs favorably against state-of-the-art proofreading methods on different connectomics datasets.Comment: Supplemental material available at http://rhoana.org/guidedproofreading/supplemental.pd

Real-time Virtual Object Insertion for Moving 360° Videos

We propose an approach for real-time insertion of virtual objects into pre-recorded moving-camera 360° video. First, we reconstruct camera motion and sparse scene content via structure from motion on stitched equirectangular video. Then, to plausibly reproduce real-world lighting conditions for virtual objects, we use inverse tone mapping to recover high dynamic range environment maps which vary spatially along the camera path. We implement our approach into the Unity rendering engine for real-time virtual object insertion via differential rendering, with dynamic lighting, image-based shadowing, and user interaction. This expands the use and flexibility of 360° video for interactive computer graphics and visual effects applications