Results 81 to 90 of about 178,572 (274)

Prototyping an Innovative Ducted Fan System With Multi‐element Wings for the Electric Propulsion of Flying Devices

Macromolecular Symposia, EarlyView.
ABSTRACT This paper presents theoretical aspects and experimental tests for the design and optimization of a novel ducted fan propulsion system, complemented by multi‐element wings inspired by Handley Page and the aerodynamic Channel Wing concept.
Adrian Niță, Magdalena Roşu, Adina‐Mihaela Struț, Nicolae Pop, Mihaiela Iliescu   +4 more
wiley   +1 more source

Prototype Downscaling Algorithm for MODIS Satellite 1 km Daytime Active Fire Detections

Fire, 2019
This work presents development of an algorithm to reduce the spatial uncertainty of active fire locations within the 1 km MODerate resolution Imaging Spectroradiometer (MODIS Aqua and Terra) daytime detection footprint.
Sanath Sathyachandran Kumar, Joshua J. Picotte, Birgit Peterson   +2 more
doaj   +1 more source

Methods of Rapid Quality Assessment for National-Scale Land Surface Change Monitoring

Remote Sensing, 2020
Providing rapid access to land surface change data and information is a goal of the U.S. Geological Survey. Through the Land Change Monitoring, Assessment, and Projection (LCMAP) initiative, we have initiated a monitoring capability that involves ...
Qiang Zhou, Christopher Barber, George Xian   +2 more
doaj   +1 more source

PLA/Kahili Ginger Fiber Biocomposites Processed by Fused Filament Fabrication: Physical and Mechanical Characterization

Polymer Composites, EarlyView.
Processing route of PLA/KG composites and the resulting mechanical properties compared to PLA. ABSTRACT This study explores the potential of Kahili ginger (KG) fibers as reinforcement/filler in poly(lactic acid) (PLA) matrix composites for 3D printing applications.
Bruno Lourenço, Rita Serôdio, Ana Clara Marques, Raquel Galante, Ricardo Claudio, Célio G. Figueiredo‐Pina   +5 more
wiley   +1 more source

Physics-Based Satellite-Derived Bathymetry (SDB) Using Landsat OLI Images

Remote Sensing
The estimation of depth in optically shallow waters using satellite imagery can be efficient and cost-effective. Active sensors measure the distance traveled by an emitted laser pulse propagating through the water with high precision and accuracy if the ...
Minsu Kim, Jeff Danielson, Curt Storlazzi, Seonkyung Park   +3 more
doaj   +1 more source

Sliding Mode Control in Aerospace Applications: A Survey

International Journal of Robust and Nonlinear Control, EarlyView.
ABSTRACT Sliding mode control (SMC) enjoys robustness to matched and unmatched (in the case of minimum phase input‐output dynamics) bounded perturbations, and finite time convergence. Second‐order and higher‐order sliding mode control systems (2‐SMC/HOSMC) retain all the advantages of sliding mode control, but in addition can be applied to systems of ...
Yuri Shtessel, Christopher Edwards
wiley   +1 more source

Land use and carbon dynamics in the southeastern United States from 1992 to 2050

Environmental Research Letters, 2013
Land use and land cover change (LUCC) plays an important role in determining the spatial distribution, magnitude, and temporal change of terrestrial carbon sources and sinks.
Shuqing Zhao, Shuguang Liu, Terry Sohl, Claudia Young, Jeremy Werner   +4 more
doaj   +1 more source

Evaluating the Temperature Difference Parameter in the SSEBop Model with Satellite-Observed Land Surface Temperature Data

Remote Sensing, 2019
The Operational Simplified Surface Energy Balance (SSEBop) model uses the principle of satellite psychrometry to produce spatially explicit actual evapotranspiration (ETa) with remotely sensed and weather data.
Lei Ji, Gabriel B. Senay, Naga M. Velpuri, Stefanie Kagone   +3 more
doaj   +1 more source

Improving forest age estimation to understand subtropical forest regrowth dynamics using deep learning image segmentation of time‐series historical aerial photographs

Remote Sensing in Ecology and Conservation, EarlyView.
Accurately estimating forest age is key to understanding how forests recover and evaluating restoration success. We developed a two‐step deep learning approach using historical greyscale aerial photographs to map forest age at fine spatial scales. By combining a pre‐trained model with localized fine‐tuning, our U‐Net + ResNet50 architecture achieved ...
Ying Ki Law, Yi‐Fei Gu, Shuwen Liu, Guangqin Song, Aland H. Y. Chan, Cham Man Tse, Zhonghua Liu, Martha J. Ledger, Billy C. H. Hau, Sawaid Abbas, Jin Wu   +10 more
wiley   +1 more source

Analysis of stereotypic behaviour and enhanced management in captive Northern Giraffe Giraffa camelopardalis housed at Zoological Garden Alipore, Kolkata

Journal of Threatened Taxa, 2020
In the wild, giraffes live complex social lives exhibiting fission-fusion social systems.  They have sophisticated communication which likely forms a crucial component regulating subgroup dynamics.
Tushar Pramod Kulkarni
doaj   +1 more source