Results 81 to 90 of about 993,247 (318)
Agribusiness, EarlyView.ABSTRACT This paper explores the convergence in on‐farm diversification strategies of agricultural holdings, between remote areas and more central ones. Using Italian farm‐level data, we explore the determinants of diversification strategies across farms.
Gianluca Grilli +2 more
wiley +1 more source
Multi-target tracking of birds in complex low-altitude airspace based on GM_PHD filter
The Journal of Engineering, 2019 GM_PHD (Gaussian mixture of probability hypothesis density) cannot completely track multiple targets, such as the flying birds in the complex low-altitude airspace near the airport, due to the lack of the steps of birth detection, track extraction and ...
Tao Hong +4 more
doaj +1 more source
The Stealth Biplane: a Proposal in Response to a Low Reynolds Number Station Keeping Mission [PDF]
The Stealth Biplane is conceived and constructed to serve as a remotely piloted vehicle designed to navigate a low-level figure-eight course at a target Reynolds number of 100,000.
Donovan, Steven +6 more
core +1 more source
Directed Energy Interception of Satellites
, 2019 High power Earth and orbital-based directed energy (DE) systems pose a potential hazard to Earth orbiting spacecraft. The use of very high power, large aperture DE systems to propel spacecraft is being pursued as the only known, feasible method to ...
Hettel, Will +2 more
core +2 more sources
High‐Speed Altitude Regulation With Neuromorphic Camera and Lightweight Embedded Computation
Advanced Intelligent Systems, EarlyView.Neuromorphic cameras deliver rapid, high‐dynamic‐range sensing but overwhelm embedded processors at high speeds. This work presents a lightweight, optimized Lucas–Kanade optical flow method with parallelization, gyroscopic derotation, and adaptive event slicing.
Simon L. Jeger +3 more
wiley +1 more source
Climate and seed mass drive intraspecific variation in seed longevity in storage
American Journal of Botany, EarlyView.Abstract Premise Conservation seed banks are essential for ex situ plant conservation, but stored seeds slowly deteriorate and lose viability. Seed longevity in storage is determined by the initial seed viability and the rate of seed viability loss. The rate of seed viability loss in storage varies between species and possibly between populations or ...
Lea Klepka +2 more
wiley +1 more source
Applications in Plant Sciences, EarlyView.Abstract Premise As the sister clade to angiosperms, extant gymnosperms are crucial for reconstructing ancestral gene regulatory networks in seed plants. This highlights the need for model systems representing each of their distinct lineages. However, tools to quickly and effectively investigate gene function in gymnosperms are still limited due to the
Anthony G. K. Garcia +4 more
wiley +1 more source
Two HSCT Mach 1.7 low sonic boom designs [PDF]
, 1992 The objective of this study was to provide low sonic boom concepts, geometry, and analysis to support wind tunnel model designs. Within guidelines provided by NASA, two High Speed Civil Transport (HSCT) configurations were defined with reduced sonic boom
Haglund, George T., Ogg, Steven S.
core +1 more source
A cost‐effective DNA extraction protocol for long‐read sequencing in non‐model plants
Applications in Plant Sciences, EarlyView.Abstract Premise Third‐generation sequencing has revolutionized genomics, enabling in‐depth analysis of genome sequence, structure, and epigenetic features. Yet, extracting high‐quality DNA for long‐read sequencing remains a bottleneck—particularly in non‐model plants, such as mature trees growing in natural environments, which often contain abundant ...
Sofia Gaischuk +6 more
wiley +1 more source
IEEE Journal of Selected Topics in Applied Earth Observations and Remote SensingDetecting low-altitude small targets in complex scenes is highly valuable. However, modal differences and registration errors between infrared and microwave data still pose significant challenges to accurate detection.
Xiaoyu Li +5 more
doaj +1 more source