757 research outputs found
TOPS Imaging with TerraSAR-X: Mode Design and Performance Analysis
No full textThis paper reports about the performed investigations for the implementation of the wide swath TOPS imaging mode with TerraSAR-X. The TOPS mode overcomes the limitations imposed by the ScanSAR mode by steering the antenna along-track during the acquisition of a burst. In this way, a uniform signal to noise ratio (SNR) is achieved, and consequently, scalloping and an azimuth-dependent distributed target ambiguity ratio (DTAR) are avoided. However, the use of electronically steered antennas leads to a quantization of the steering law and a non-ideal pattern for squinted angles (grating lobes and main lobe reduction). The former provokes spurious peaks, while the latter introduces a slight scalloping and DTAR deterioration. These effects are analyzed and quantified for TerraSAR-X and a TOPS system design approach is presented. Next, the requirements concerning interferometry are investigated. Finally, several results are shown with TerraSAR-X data, including a comparison between the TOPS and ScanSAR modes and the reporting of first TOPS interferometric results
Killing potato tops with chemicals in Oregon
No full textTitle from PDF caption (viewed on December 7, 2017).This archived document is maintained by the State Library of Oregon as part of the Oregon Documents Depository Program. It is for informational purposes and may not be suitable for legal purposes.Mode of access: Internet from the Oregon Government Publications Collection.Text in English
A 115.1 TOPS/W, 12.1 TOPS/mm<sup>2</sup>Computation-in-Memory using Ring-Oscillator based ADC for Edge AI
No full textAnalog computation-in-memory (CIM) architecture alleviates massive data movement between the memory and the processor, thus promising great prospects to accelerate certain computational tasks in an energy-efficient manner. However, data converters involved in these architectures typically achieve the required computing accuracy at the expense of high area and energy footprint which can potentially determine CIM candidacy for low-power and compact edge-AI devices. In this work, we present a memory-periphery co-design to perform accurate A/D conversions of analog matrix-vector-multiplication (MVM) outputs. Here, we introduce a scheme where select-lines and bit-lines in the memory are virtually fixed to improve conversion accuracy and aid a ring-oscillator-based A/D conversion, equipped with component sharing and inter-matching of the reference blocks. In addition, we deploy a self-timed technique to further ensure high robustness addressing global design and cycle-to-cycle variations. Based on measurement results of a 4Kb CIM chip prototype equipped with TSMC 40nm, a relative accuracy of up to 99.71% is achieved with an energy efficiency of 115.1 TOPS/W and computational density of 12.1 TOPS/mm2 for the MNIST dataset. Thus, an improvement of up to 11.3X and 7.5X compared to the state-of-the-art, respectively.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Computer EngineeringElectrical Engineering, Mathematics and Computer ScienceQuantum & Computer Engineerin
Enabling the Processing of Sentinel-1 TOPS Data with the Open-Source DORIS Software (PPT)
No full textPart of Session 3 - Sentinel-1 TOPS InSAR resultsMathematical Geodesy and Positionin
What Ownership Society: Debating Housing and Social Security Reform in the United States
No full textThis article explores President George W. Bush's "ownership society" blueprint in comparative and historical perspective. By taking the "ownership society" seriously, it is possible to understand how it is deeply rooted in the American cultural repertoire, and how it offers a coherent neo-liberal discourse aimed at constructing the "need to reform" existing social policy legacies in the sense of a greater reliance on private savings and ownership. Although grounded in the American repertoire, President Bush's "ownership society" is inspired by a foreign model: Thatcher's "popular capitalism," another neo-liberal blueprint that featured a similar celebration of personal ownership. Discussing Thatcherism briefly before analyzing the debate over President Bush's "ownership society" in the fields of housing and pensions, this article underlines the relationship between ideational processes and institutional legacies in policy-making.housing, pensions, ideas, institutions, United States, Britain
Bulletin No. 227 - Sugar Beet Tops, Cottonseed Cake, and Mono-Calcium Phosphate in Rations for Steers
No full textBulletin No. 227 - Sugar Beet Tops, Cottonseed Cake, and Mono-Calcium Phosphate in Rations for Steer
View from Wooly Tops
No full textThis photograph looking eastward from Wooly Tops is included in the records of the Smoky Mountains Hiking Club, formed after a group of outdoor enthusiasts hiked up to Mount LeConte in October 1924. The image was made by hiking club member, Walter Berry. Also penciled in on the back of the photograph is “C.C. Campbell,” referring to Carlos C. Campbell (1892-1978), a founding member of the Great Smoky Mountains Conservation Association and author of “Birth of a National Park.
Chimney Tops from Bear Pen Hollow
No full textThis photograph of Chimney Tops is taken from Bear Pen Hollow with hikers standing beside the Newfound Gap Highway. This picture was made by Carlos C. Campbell (1892-1978), a founding member of the Great Smoky Mountains Conservation Association and author of “Birth of a National Park,” published in 1960. This photograph, with others in this series, are included in the records of the Smoky Mountains Hiking Club, formed after a group of outdoor enthusiasts hiked up to Mount LeConte in October 1924
Yunnan (China), American soldier with a group of local children in front of a temple
No full textYunnan Province, China - 1943 - 45A group of children always followed Americans. They were not one bit inhibited. These children are not too badly off. The clothes are fairly good, not too patched up. One is even wearing shoes. In front of a temple - the intricate grill work is wood and the grilled screen tops of the doors provide the only light source for the temple.GrayscaleBox
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