Results 131 to 140 of about 1,992,735 (378)

The Stealth Biplane: a Proposal in Response to a Low Reynolds Number Station Keeping Mission [PDF]

open access: yes
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

A Skills Gap Analysis of Farmer Directors of US Farmer Cooperatives

open access: yesAgribusiness, EarlyView.
ABSTRACT Boards of directors are vital to firm performance and are an integral part of the decision‐making process of any business. Several studies have been conducted that observe corporate or nonprofit board characteristics, skills, and the board's connection to firm performance.
Jody S. Herchenbach   +5 more
wiley   +1 more source

The Penguin: a Low Reynolds Number Powered Glider for Station Keeping Missions [PDF]

open access: yes
The Penguin is a low Reynolds number (approx. 100,000) remotely piloted vehicle (RPV). It was designed to fly three laps indoors around two pylons in a figure-eight course while maximizing loiter time.
Costello, J. K.   +6 more
core   +1 more source

The Power of Unity: Collective Action and Smallholder Agricultural Performance in West Africa

open access: yesAgribusiness, EarlyView.
ABSTRACT We analyze the impact of collective action through farmer‐based organizations (FBOs) on smallholders' farm performance and income inequality in Ghana, Benin, The Gambia, and Mali. We find that FBO membership increases cereal yield in Ghana and The Gambia, legume yield in Mali, ruminant numbers in Benin and The Gambia, and total farm income in ...
Emmanuel Donkor   +3 more
wiley   +1 more source

Flow Control Methods and Their Applicability in Low-Reynolds-Number Centrifugal Compressors—A Review

open access: yes, 2017
The decrease in the performance of centrifugal compressors operating at low Reynolds numbers (e.g., unmanned aerial vehicles at high altitudes or small turbomachines) can reach 10% due to increased friction.
Jonna Tiainen   +3 more
semanticscholar   +1 more source

Log-Poisson Cascade Description of Turbulent Velocity Gradient Statistics

open access: yes, 2009
The Log-Poisson phenomenological description of the turbulent energy cascade is evoked to discuss high-order statistics of velocity derivatives and the mapping between their probability distribution functions at different Reynolds numbers.
A. N. Kolmogorov   +13 more
core   +1 more source

Digital Point‐of‐Care Testing Device Based on Bioluminescent Pyrophosphate in Real‐Time and Recombinase‐aid Amplification

open access: yesAdvanced Intelligent Systems, EarlyView.
A point‐of‐care testing method based on solvent‐responsive magnetic beads suitable for large‐area diagnosis and mutation screening in remote areas was developed to detect it by combining bioluminescenct pyrophosphate in real‐time technology and recombinase‐aid amplification technology.
Zhongjie Fei   +8 more
wiley   +1 more source

Multimodal Locomotion of Soft Robots

open access: yesAdvanced Intelligent Systems, EarlyView.
This review comprehensively surveys recent advances in multimodal locomotion within soft robotics. Typical locomotion modes are summarized and categorized. Furthermore, the underlying mechanisms enabling multimodal locomotion are discussed and classified into three primary categories: active control‐based, reconfiguration‐based, and environment ...
Zihao Yuan   +4 more
wiley   +1 more source

Aerodynamic study of the corrugated airfoil at ultra-low Reynolds number

open access: yesAdvances in Mechanical Engineering, 2019
In this study, Aeshna cyanea dragonfly forewing mid-cross-section corrugated airfoil was simulated at ultra-low Reynolds number. The corrugated airfoil was compared with its smooth counterpart to study the effect of the corrugations upon the aerodynamic ...
Mahmoud E Abd El-Latief   +2 more
doaj   +1 more source

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