Results 41 to 50 of about 3,625 (168)

Efficient Compressed Sensing-Based Backprojection Approach for Small Drone-Borne W-Band SAR Imaging

Remote Sensing
Small drone-borne W-band synthetic aperture radar (SAR) systems are highly susceptible to motion errors that conventional navigation sensors and phase-based autofocus algorithms cannot effectively resolve due to phase wrapping.
In-Hyeok Lee, Min-Gon Cho, Hyun-Dong Kim, Kyung-Tae Kim   +3 more
doaj   +1 more source

A compact lightweight multipurpose ground-penetrating radar for glaciological applications

, 2011
We describe a compact lightweight impulse radar for radio-echo sounding of subsurface structures designed specifically for glaciological applications. The radar operates at frequencies between 10 and 75 MHz.
Frolovskiy, K., Lapazaran Izargain, Javier Jesús, Machío, F., Navarro Valero, Francisco José, Vasilenko, Evgeniy   +4 more
core   +1 more source

Toward a theory of Bayesian experimentation in early‐stage ventures

Strategic Entrepreneurship Journal, EarlyView.
Abstract Research Summary The entrepreneurship literature has established the benefits of experimentation but has paid comparatively little attention to its costs. We develop a Bayesian model to illustrate the entrepreneurial choice between direct and experimental entry.
Andrea Contigiani, Lien Denoo, Márton Hablicsek   +2 more
wiley   +1 more source

From armed roots to airline routes in South America: A dual imprinting perspective

Strategic Management Journal, EarlyView.
Abstract Reserch Summary We propose that founding partner relationships can leave distinct imprints on organizations that differ in durability and in how they respond to subsequent changes involving the founding partner. Examining South American airlines founded between 1919 and 1984, we argue and find that such relationships simultaneously create an ...
Kunyuan Qiao, Shon R. Hiatt, Wesley D. Sine   +2 more
wiley   +1 more source

Flexural performance of concrete‐filled steel tubular beams with wood chip aggregate

Structural Concrete, EarlyView.
Abstract This study investigates the flexural performance of concrete‐filled steel tubular (CFST) beams with partial replacement of aggregates by wood chips (0%–25%) through experimental and numerical analysis. This study is novel in that it experimentally and numerically investigates the flexural behavior of CFST beams with partial replacement of ...
Mizan Ahmed, Mohamed Emara, Vipulkumar Ishvarbhai Patel, Wensu Chen, Xihong Zhang, Faiz Shaikh, Ahmed Hamoda   +6 more
wiley   +1 more source

Advancements and trends in mangrove species mapping based on remote sensing: A comprehensive review and knowledge visualization

Global Ecology and Conservation
Mapping and monitoring of mangrove species based on remote sensing technology play a crucial role in biodiversity conservation and management. This paper employs CiteSpace to visualize the literature and presents a comprehensive review of the researches ...
Yuqi Wu, Chunyan Lu, Kexin Wu, Wenna Gao, Nuocheng Yang, Jingwen Lin   +5 more
doaj   +1 more source

Target shape reconstruction from multi-perspective shadows in drone-borne SAR systems [PDF]

This paper explores the potentials of multi-perspective shadow features in drone-borne SAR images for the reconstruction of targets' shapes. By exploiting target shadows from multiple viewing angles, a comprehensive understanding of targets' morphology ...
Gilliam, Christopher; id_orcid, Nasso, Ilaria, Antoniou, Michail, Pastina, Debora, Bekar, Ali, Bekar, Ali; id_orcid, Gilliam, Christopher, Santi, Fabrizio   +7 more
core   +1 more source

Low-Frequency Drone-Borne GPR for Soil Conductivity Mapping

, 2021
In this study, we proposed a low-frequency drone-based GPR for soil conductivity mapping. The lightweight radar system consists of a handheld VNA, a microcomputer, a differential GPS and a power bank. A 5-meter half-wave dipole antenna is used to provide
Elodie Jacquemin, NSG2021 27th European Meeting of Environmental and Engineering Geophysics, Thibaut Parizel, L. Palt, Sébastien Lambot, Wu, Kaijun, Loïc Ory, Vincent Dienst   +7 more
core   +1 more source

Probabilistic estimation of reliable sensor spacing for wire break detection in prestressed concrete using acoustic emission technique

Structural Concrete, EarlyView.
Abstract The acoustic emission (AE) technique has proven to be an effective method for detecting individual wire breaks in prestressed concrete structures affected by stress corrosion cracking (SCC). However, despite its widespread application, the quantitative assessment of AE monitoring reliability and optimal sensor placement remains unresolved ...
Max Fiedler, Steffen Marx
wiley   +1 more source

Mapping small-sized logging disturbances in tropical forests using Sentinel-1 time series and an extensive ground truth dataset

Frontiers in Remote Sensing
Deforestation and forest degradation are the main threats to biodiversity and carbon stocks in tropical forests. Advances in optical and SAR satellite sensors have enabled the development of real-time monitoring of deforestation on a global scale. SAR is
Audrey Mercier, Audrey Mercier, Audrey Mercier, Audrey Mercier, Julie Betbeder, Julie Betbeder, Frédéric Mortier, Frédéric Mortier, Nicolas Barbier, Pierre Ploton, Pierre Ploton, Guillaume Cornu, Guillaume Cornu, Pierre Couteron   +13 more
doaj   +1 more source