First observation of the cosmic ray shadow of the Moon and the Sun with KM3NeT/ORCA

New vortex-lift and tangential-force models for HAWT aerodynamic load prediction

Horizontal axis wind turbines (HAWTs) experience three-dimensional rotational and unsteady aerodynamic phenomena at the rotor blades sections. These highly unsteady three-dimensional effects have a dramatic impact on the aerodynamic load distributions on the blades, in particular, when they occur at high angles of attack due to stall delay and...

Micro and nanopatterning of functional materials on flexible plastic substrates via site-selective surface modification using oxygen plasma

A simple and cost effective methodology for large area micro and nanopatterning of a wide range of functional materials on flexible substrates is presented. A hydrophobic-hydrophilic chemical contrast was patterned on surfaces of various flexible plastic substrates using molds and shadow masks with which selected areas of the substrate surface...

Radar and Wind Turbines: A Guide to Acceptance Criteria

A wind turbine placed in the vicinity of a primary radar system (PSR) can impact the performance of that system. This paper discusses criteria by which wind turbine placement can be assessed. The effects considered are desensitization overhead and shadowing. The criteria have been implemented in a wind turbine acceptance program that is going to...

Sensitivity Analysis of the Optimal Parameter Settings of an LTE Packet Scheduler

Advanced packet scheduling schemes in 3G/3G+ mobile networks provide one or more parameters to optimise the trade-off between QoS and resource efficiency. In this paper we study the sensitivity of the optimal parameter setting for packet scheduling in LTE radio networks with respect to various traffic and environment aspects. For our...

Shadow Enhancement in Synthetic Aperture Sonar Using Fixed Focusing

Abstract—A shadow cast by an object on the seafloor is important information for target recognition in synthetic aperture sonar (SAS) images. Synthetic aperture imaging causes a fundamental limitation to shadow clarity because the illuminator is moved during the data collection. This leads to a blend of echo and shadow, or geometrical fill-in in...

Shadow detection using a physical basis

Shadow detection is an important aspect of foreground/ background classification. Many techniques exist, most of them assuming that casting a shadow results only in a change in intensity and no change in color. In this paper we show that in most practical indoor and outdoor situations there will also be a color shift. We propose an algorithm for...

Shadow detection using a physical basis

Shadow detection is an important aspect of foreground/background classification. Many techniques exist, most of them assuming that only the intensity changes under shadow. In this paper we show that in most practical indoor and outdoor situations there will also be a color shift. We propose an algorithm for estimating this color shift from the...

Shadow enhancement in synthetic aperture sonar imagery for improved target classification

The acoustic shadow of a target is a strong classification clue in naval mine hunting. A shadow of bottom targets appears at relatively short ranges (≤ about 200 m) in high resolution images from sidescan or synthetic aperture sonar (SAS), against a background of sea floor reverberation. In SAS however, definition of the shadow reduces with...