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Modelling the spatial distribution of DEM error

by Bruce H Carlisle - Transactions in GIS , 2005
"... Abstract Assessment of a DEM's quality is usually undertaken by deriving a measure of DEM accuracy -how close the DEM's elevation values are to the true elevation. Measures such as Root Mean Squared Error and standard deviation of the error are frequently used. These measures summarise el ..."
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measured at a limited number of sample locations, and some other more widely measured variable Developing an Error Surface The research uses DEMs and terrain parameters from two study areas. These are described below. Study Areas and Data Initial research was based on a 1km x 2km area of Snowdonia, North

RICE UNIVERSITY Regime Change: Sampling Rate vs. Bit-Depth in Compressive Sensing

by Jason Noah Laska , 2011
"... The compressive sensing (CS) framework aims to ease the burden on analog-to-digital converters (ADCs) by exploiting inherent structure in natural and man-made signals. It has been demon-strated that structured signals can be acquired with just a small number of linear measurements, on the order of t ..."
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. We develop a new theoretical framework to analyze this extreme case and develop new algorithms for signal reconstruction from such coarsely quantized measurements. The 1-bit CS framework leads us to scenarios where it may be more appropriate to reduce bit-depth instead of sampling rate. We find

Guaranteeing Communication Quality in Real World WSN Deployments

by Fbk-irst Bruno, Kessler Foundation, Matteo Ceriotti, Dr. Amy, L. Murphy, Bruno Kessler Foundation (fbk-irst, Amy L. Murphy, Prof Prabal Dutta, Prof Koen Langendoen, Prof Leo Selavo
"... April 29, 2011Für UnsShe had never before seen a rabbit with either a waistcoat-pocket, or a watch to take out of it, and burning with curiosity, she ran across the field after it Lewis CarrollThe following document, written under the supervision of Dr. reviewed by: ..."
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April 29, 2011Für UnsShe had never before seen a rabbit with either a waistcoat-pocket, or a watch to take out of it, and burning with curiosity, she ran across the field after it Lewis CarrollThe following document, written under the supervision of Dr. reviewed by:

1Sub-Nyquist Radar via Doppler Focusing

by Omer Bar-ilan, Yonina C. Eldar
"... Abstract—We investigate the problem of a monostatic pulse-Doppler radar transceiver trying to detect targets, sparsely populated in the radar’s unambiguous time-frequency region. Several past works employ compressed sensing (CS) algorithms to this type of problem, but either do not address sample ra ..."
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rate sampling and digital processing, imposes no restrictions on the transmitter, and uses a CS dictionary with size which does not increase with increasing number of pulses P. Furthermore, in the presence of noise, Doppler focusing enjoys a signal-to-noise ratio (SNR) improvement which scales linearly

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by Paul Sivilotti, Dong Xuan, Xiaodong Zhang, Hongwei Zhang
"... Messaging is a basic service in sensornets. Yet the unique system and application prop-erties of sensornets pose substantial challenges for the messaging design: Firstly, dynamic wireless links, constrained resources, and application diversity challenge the architecture and protocol design of sensor ..."
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, the lack of a basic un-derstanding of its essential components has been an obstacle for reliable, efcient, and reusable messaging services in sensornets. To address this problem, one task of this dis-sertation is to identify the basic components of sensornet messaging and to study the re-lated algorithmic

Using BubbleStorm Accepted Master-Thesis from Marcel Lucas

by Assessor Prof Alej, Ro P. Buchmann, Ph. D
"... Hiermit versichere ich, die vorliegende Master-Thesis ohne Hilfe Dritter nur mit den angegebenen Quellen und Hilfsmitteln angefertigt zu haben. Alle Stellen, die aus Quellen entnommen wurden, sind als solche kenntlich gemacht. Diese Arbeit hat in gleicher oder ähnlicher Form noch keiner Prüfungsbehö ..."
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Prüfungsbehörde vorgelegen. Darmstadt, den 17. Mai 2011 (Marcel Lucas) The popularity of Networked Virtual Environments (NVE) increased remarkably in recent years where a plethora of players participate concurrently. Traditional approaches applying the Client/Server pattern swiftly reach their limit in terms

Eddy stirring in the Southern Ocean

by A. C. Naveira
"... [1] There is an ongoing debate concerning the distribution of eddy stirring across the Antarctic Circumpolar Current (ACC) and the nature of its controlling processes. The problem is addressed here by estimating the isentropic eddy diffusivity from a collection of hydrographic and altimetric observ ..."
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[1] There is an ongoing debate concerning the distribution of eddy stirring across the Antarctic Circumpolar Current (ACC) and the nature of its controlling processes. The problem is addressed here by estimating the isentropic eddy diffusivity from a collection of hydrographic and altimetric

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by Mathematisch-naturwissenschaftlichen Fakultät, Stefan Lange, Prof Dr, Jan-hendrik Olbertz, Prof Dr, Elmar Kulke
"... eingereicht an der ..."
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eingereicht an der

1 Acknowledgements

by Entwurf Entwicklung, Sensornetz-testbeds Wald-monitoring, Masterarbeit Von Iliya Gurov, Vorgelegte Masterarbeit, Iliya Gurov, Gutachter Prof Alej, Ro Buchmann, Tag Der Einreichung, Ehrenwörtliche Erklärung Zur Masterarbeit, I Mr, Pablo Guerrero, Prof Alej, Ro Buchmann , 2013
"... den angegebenen Quellen und Hilfsmitteln angefertigt zu haben. Alle Stellen, die aus Quellen entnommen wurden, sind als solche kenntlich gemacht. Diese Arbeit hat in gleicher oder ähnlicher Form noch keiner Prüfungsbehörde vorgelegen. Darmstadt, den 15.01.2013 ..."
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den angegebenen Quellen und Hilfsmitteln angefertigt zu haben. Alle Stellen, die aus Quellen entnommen wurden, sind als solche kenntlich gemacht. Diese Arbeit hat in gleicher oder ähnlicher Form noch keiner Prüfungsbehörde vorgelegen. Darmstadt, den 15.01.2013

To cite this version:

by Patrice Abry, Richard Baraniuk, Patrick Fl, Rudolf Riedi, Darryl Veitch, Patrice Abry, Richard Baraniuk, Patrick Fl, Rudolf Riedi, Darryl Veitch Wavelet, Patrice Abry, Richard Baraniuk, Patrick Fl, Rudolf Riedi, Darryl Veitch , 2007
"... HAL is a multi-disciplinary open access archive for the deposit and dissemination of sci-entific research documents, whether they are pub-lished or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L’archive ouverte p ..."
Abstract - Add to MetaCart
HAL is a multi-disciplinary open access archive for the deposit and dissemination of sci-entific research documents, whether they are pub-lished or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L’archive ouverte
Results 1 - 10 of 45