Results 21 to 30 of about 4,496,087 (288)

TrackingStorm: Visualization Tool for a Storm Detector Network (SDN) in the LF Spectrum

open access: yesBrazilian Archives of Biology and Technology, 2021
During the last year the Group of Atmospheric Electricity Phenomena (FEA/UFPR) developed a short range lightning location network based on a sensor device called Storm Detector Network (SDN), along with a set of algorithms that enables to track storms ...
Augusto Mathias Adams   +6 more
doaj   +1 more source

High-precision robust broadband ultrasonic location and orientation estimation [PDF]

open access: yes, 2009
This paper presents an indoor broadband ultrasonic system for estimation of a mobile device’s 3-D location and three-axis orientation using beacons. It presents the first implementation and characterization of a real frequency hopping spread spectrum ...
J. R. Gonzalez   +3 more
core   +2 more sources

Enhanced Positioning Techniques for Hybrid Wireless Networks [PDF]

open access: yes, 2011
The objective of this paper is to propose a reliable and accurate positioning method, which provides location estimates for the mobile user in hybrid wireless network (IEEE802.11/WiFi, IEEE802.16/WiMAX and LTE technologies).
Zvikhachevskaya, Anna   +4 more
core   +4 more sources

Delivering real-world ubiquitous location systems [PDF]

open access: yes, 2005
A large number of research and commercial location systems havebeen developed over the past twodecades [7]. In general, these systems have one of two goals: providing highly accurate location estimates, on the order of centimeters, within a small area ...
Nixon, P.   +3 more
core   +3 more sources

Performance Analysis of the SIFT Operator for Automatic Feature Extraction and Matching in Photogrammetric Applications

open access: yesSensors, 2009
In the photogrammetry field, interest in region detectors, which are widely used in Computer Vision, is quickly increasing due to the availability of new techniques.
Francesco Nex   +2 more
doaj   +1 more source

Location accuracy of VLF World-Wide Lightning Location (WWLL) network: Post-algorithm upgrade [PDF]

open access: yesAnnales Geophysicae, 2005
An experimental VLF World-Wide Lightning Location (WWLL) network has been developed through collaborations with research institutions across the globe.
C. J. Rodger   +2 more
doaj   +1 more source

Locating Transparent Objects to Millimetre Accuracy

open access: yesCoRR, 2019
Transparent surfaces, such as glass, transmit most of the visible light that falls on them, making accurate pose estimation challenging. We propose a method to locate glass objects to millimetre accuracy using a simple Laser Range Finder (LRF) attached to the robot end-effector.
Nicholas Adrian, Quang-Cuong Pham
openaire   +3 more sources

Location accuracy of long distance VLF lightning locationnetwork [PDF]

open access: yesAnnales Geophysicae, 2004
An experimental VLF WorldWide Lightning Location (WWLL) network is being developed to provide realtime locations of cloud to ground lightning discharges occurring throughout the globe. This network has expanded from a limited number of stations in the
C. J. Rodger   +3 more
doaj   +1 more source

The ability to appropriately distinguish throws for different target positions

open access: yesFrontiers in Sports and Active Living, 2023
Repeated and accurate throwing of an object to a target position is a special human motor skill. It is particularly important to understand accuracy, which has received less attention than speed due to difficulties in measurement.
Ayane Kusafuka   +4 more
doaj   +1 more source

Location of Firms and Outsourcing [PDF]

open access: yes, 2023
We analyze the location of final goods producers under spatial competition with strategic input price determination by firm-specific input suppliers when the final goods producers undertake complete outsourcing or bi-sourcing. Under complete outsourcing,
Mukherjee, Arijit   +3 more
core   +1 more source

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