Results 41 to 50 of about 45,046 (176)
Design and Test of Beamforming Networks for a Galileo Antenna Array [PDF]
, 2006 The aim of the work is the design of a series of passive feeding networks that will steer the main beam of a Galileo antenna into different fixed directions to evaluate the performance of the array under such ...
Arango Selga, Arturo
core
Beamforming analysis on a broadband antenna array for the Galileo system [PDF]
, 2006 The objective of this work is to demonstrate, through simulation results, an optimized beamforming approach on an antenna array designed to operate at the Galileo frequency bands.
Heckler, Marcos Vinicio Thomas +7 more
core +1 more source
Perché lo spazio è così importante per le regioni?
GEOmedia, 2014 Space activities are very specific in their ability to produce growth and competitiveness and in their continental dimensions are a strategic asset for the competition and defense, aimed at peaceful way, in a troubled era.
Giovanni Sylos Labini
doaj
Galileo Integrity Concept and its Applications to the Maritime Sector [PDF]
TransNav, 2009 Galileo is the European Global Navigation Satellite System, under civilian control. Galileo will provide their users with highly accurate global positioning services and their associated integrity information.
Carlos HernÁndez +2 more
doaj
Remote Sensing in Ecology and Conservation, EarlyView.We developed PZM‐YOLO to automatically detect plateau zokor mounds in UAV imagery of alpine meadows. The model achieved reliable detection of small and densely distributed mounds under complex backgrounds, outperforming the baseline YOLOv5s. This framework supports mound counting, mound position, rodent impact assessment, and grassland restoration ...
Yang Yang +5 more
wiley +1 more source
How to Break Through the Ceiling of Scientific Progress?—Innovation Challenges and Pathways Based on the Fitness Landscape Framework [PDF]
Exploration (Beijing)Science has not hit an absolute ceiling; it is stranded on a local peak. Viewed through Wright's fitness landscape, today's evaluation and funding systems over‐select, refining work within established paradigms while suppressing the drift and recombination needed to cross fitness valleys.
Zhu K, Sun L, Du P.
europepmc +2 more sources
Sustainable Development, EarlyView.ABSTRACT Sustainability represents a complex issue in which scientific knowledge inevitably coexists with the subjective perception of humans in its turn influenced by civilization, cultural but also unconscious aspects. These results emerge with evidence from a critical analysis of the main definitions of sustainability delivered by credited entities (
Francesco Di Maria, Hamid Safarzadeh
wiley +1 more source
Journal for Eighteenth-Century Studies, EarlyView.Abstract This article analyses to what degree Benjamin Robins's discoveries in his book New Principles of Gunnery, 1742, affected the British mathematical, military, and educational world of the mid‐eighteenth century. While it drew praise and critique from Europe, especially from the notable mathematician Leonhard Euler, his mathematical theories were
Samuel Dodson
wiley +1 more source
Australian Endodontic Journal, EarlyView.ABSTRACT This study examined population‐specific morphological variations in human premolar roots and canals and their clinical implications. Cone‐beam computed tomography (CBCT) was used with the Ahmed classification system. A retrospective descriptive cross‐sectional study analysed 388 maxillary premolars from CBCT scans of 97 participants obtained ...
Gunther Arthur Streit +2 more
wiley +1 more source
From the Ground to the Stars: The Vertical Politics of the EU Drone Wall and Airspace Defence
JCMS: Journal of Common Market Studies, EarlyView.Abstract This research note analyses the European Commission's Defence Readiness Roadmap 2030 as a manifestation of a new spatial and technological logic of European defence: the vertical territorialisation of security. Moving beyond traditional perimeter‐based understandings of territorial defence, the Roadmap constructs a multi‐layered continuum ...
Justinas Lingevicius +2 more
wiley +1 more source