Results 41 to 50 of about 1,969 (165)

Pear Flower Cluster Quantification Using RGB Drone Imagery

Agronomy, 2020
High quality fruit production requires the regulation of the crop load on fruit trees by reducing the number of flowers and fruitlets early in the growing season, if the bearing is too high.
Yasmin Vanbrabant, Stephanie Delalieux, Laurent Tits, Klaas Pauly, Joke Vandermaesen, Ben Somers   +5 more
doaj   +1 more source

Assessing Remotely Piloted Aerial Systems in the characterization of rocky shores for oil spills environmental sensitivity mapping, northern São Paulo littoral, Brazil

Anais da Academia Brasileira de Ciências, 2022
The Environmental Sensitivity Index (ESI) for oil spills was developed to assist coordinators to evaluate oil spill impact along shorelines and also to coordinate the allocation of resources during and after the incident, aiming to reduce environmental ...
RODRIGO I. CERRI, FLÁVIO H. RODRIGUES, GABRIEL H.S. DE OLIVEIRA, FÁBIO A.G.V. REIS, ARTHUR WIECZOREK, GEORGE A. LONGHITANO, DÉBORA M. DUARTE   +6 more
doaj   +1 more source

Application of the RPA and Higher RPA to the V and T States of Ethylene [PDF]

The Journal of Chemical Physics, 1971
We have applied our proposed higher random-phase approximation (HRPA) to the T and V states of ethylene. In the HRPA, unlike the RPA, one solves for the excitation frequencies and the ground-state correlations self-consistently. We also develop a simplified scheme (SHRPA) for solving the equations of the HRPA, using only molecular integrals sufficient ...
Shibuya, Tai-Ichi, McKoy, Vincent
openaire   +2 more sources

RENORMALIZED RPA AT FINITE TEMPERATURE [PDF]

Modern Physics Letters A, 1996
A method taking account of a deviation of state occupation numbers from the thermal RPA prescriptions is elaborated to study collective excitations in hot nuclei. This thermal renormalized random phase approximation (TRRPA) is from Ken-Ji Hara and D.J. Rowe. In developing the TRRPA, a formalism of the thermofield dynamics (TFD) is used. Some numerical
Avdeenkov, A.V., Kosov, D.S., Vdovin, A.I.   +2 more
openaire   +3 more sources

Deterioration Causes Evaluation of Third Generation Cellular LTE Services for Moving Unmanned Terrestrial and Aerial Systems

Electrical, Control and Communication Engineering, 2018
Well-deployed cellular networks offer a cheap wireless solution for the control channel deployment of Remote-Control Vehicles (RCV) and Unmanned Aerial Vehicles (UAV).
Brodņevs Deniss, Kutins Aleksandrs
doaj   +1 more source

Use of the Micro-Doppler Effect in Classifying and Differentiating Drones from Birds [PDF]

Journal of Microwaves, Optoelectronics and Electromagnetic Applications
Small Remotely Piloted Aircrafts (RPAs) are gaining an increasingly prominent role in society. However, their growing use has raised concerns due to their potential misuse for illicit activities. Consequently, the detection and accurate classification of
Willian S. L. Soares, Tiago O. Costalonga, Guilherme R. Colen, Victor Fernandes, Vanessa P. R. Magri   +4 more
doaj   +1 more source

Apoyo a la investigación de accidentes aéreos con el uso de RPAS

Ciencia y Poder Aéreo, 2020
Este documento presenta un estudio para la implementación de RPAS (por sus siglas en inglés, Remotely Piloted Aircraft System) en la investigación de un accidente aéreo.
Edgar Leonardo Gómez Gómez, Julio Enoc Parra VillamarÍn, Julieta Vélez Mejía   +2 more
doaj   +1 more source

AEROSOL VARIABILITY OBSERVED WITH RPAS [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2013
To observe the origin, vertical and horizontal distribution and variability of aerosol particles, and especially ultrafine particles recently formed, we plan to employ the remotely piloted aircraft system (RPAS) Carolo-P360 "ALADINA" of TU Braunschweig.
B. Altstädter, A. Lampert, A. Scholtz, J. Bange, A. Platis, M. Hermann, B. Wehner   +6 more
doaj   +1 more source

Spatial Variability of the Lower Atmospheric Boundary Layer over Hilly Terrain as Observed with an RPAS

Atmosphere, 2019
The operation of a Remotely Piloted Aircraft System (RPAS) over a hilly area in northern Germany allows inspection of the variability of the profiles of temperature, humidity, and wind speed next to a small hill.
Joan Cuxart, Burkhard Wrenger, Blazenka Matjacic, Larry Mahrt   +3 more
doaj   +1 more source

Real-time drone derived thermal imagery outperforms traditional survey methods for an arboreal forest mammal.

PLoS ONE, 2020
Koalas (Phascolarctos cinereus) are cryptic and currently face regional extinction. The direct detection (physical sighting) of individuals is required to improve conservation management strategies.
Ryan R Witt, Chad T Beranek, Lachlan G Howell, Shelby A Ryan, John Clulow, Neil R Jordan, Bob Denholm, Adam Roff   +7 more
doaj   +1 more source