Results 71 to 80 of about 5,896,695 (283)

3D Closed‐Loop Navigation of Magnetic Microswimmers Using Vision‐Derived Depth Feedback

Advanced Intelligent Systems, EarlyView.
A planar magnetic microswimmer is navigated in three dimensions under a standard microscope. Image defocus supplies a real‐time depth cue, and model‐predictive control with A* planning steers the body on surfaces and in free swimming. Axial position is regulated by propulsion alone, without magnetic field gradients or extra cameras.
Yasin Cagatay Duygu, Sangwon Lee, Min Jun Kim   +2 more
wiley   +1 more source

Positive impacts of livestock and wild ungulate routes on functioning of dryland ecosystems

Ecology and Evolution, 2021
Livestock grazing is often perceived as being detrimental to the quality and functioning of dryland ecosystems. For example, a study in a semiarid Kenyan savanna proposed that cattle form bare spaces throughout the landscape, which indicate ecosystem ...
Ilan Stavi, Hezi Yizhaq, Yagil Osem, Eli Argaman   +3 more
doaj   +1 more source

Radiative Hybrid Nanofluid Flow Over a Porous Riga Surface: A Fuzzy–ANN Modeling Approach

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT This study proposes a fuzzy–ANN model to investigate the nonlinear thermal transport in a tangent hyperbolic (Tanh) hybrid nanofluid flow past a porous Riga surface, considering the effects of Rosseland diffusion, chemical reactions, and internal volumetric heating.
Azad Hussain, Rabia Zetoon, Reeha Iqbal
wiley   +1 more source

Study of the relations of sink and source in saffron by means of correlation coefficients under different irrigation and fertilization levels [PDF]

Zirā̒at va Fanāvarī-i Za̒farān, 2017
Saffron is the main medicinal plant of Iran. In order to study the relations of sink and source between saffron leaves and corms, a split plot experiment was conducted on the basis of complete randomized block design with three replications in a field in
Mahmoud Gholami, Mohammad Kafi, Hamid Reza Khazaei   +2 more
doaj   +1 more source

A rational approximation to the evolution of a free surface during fluid withdrawal through a point sink [PDF]

, 2010
The time varying flow in which fluid is withdrawn from a reservoir through a point sink of variable strength beneath a free surface is considered. Asymptotic techniques are used to derive an approximate solution to the flow that is valid at intermediate ...
Forbes, Lawrence K., Stokes, Tim E., Forbes, Lawrence, Hocking, Graeme Charles, Stokes, Timothy   +4 more
core  

Streamline and Isotherm Visual Analysis of Darcy–Forchheimer von Karman Spinning Flow of Maxwell Fluid Over a Stretching Disk With Quadratic Temperature‐Dependent Heat Source

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT This research paper provides an extensive study of the effects of Darcy–Forchheimer von‐Karman spinning flow of Maxwell fluid across a stretching disk including the effect of heat generation based on a nonlinear function of temperature. The flow system is influenced by thermal radiations and Arrhenius activation energy.
Ebrahem A. Algehyne, Mounirah Areshi, Fahad Maqbul Alamrani, Zehba Raizah, Mustafa Bayram, Jihad Younis, Anwar Saeed   +6 more
wiley   +1 more source

Source - sink balance and manipulating sink - source relations of wheat indicate that the yield potential of wheat is sink-limited in high-rainfall zones

, 2010
Grain yield depends on the number of grains per unit area (sink) and the availability of assimilates (source) to fill these grains. The aim of the current work was to determine whether wheat yield in the high-rainfall zone of south-western Australia is ...
Michael L. Poole, Neil C. Turner, Heping Zhang   +2 more
core   +1 more source

Deciphering the Palimpsest: Chronological Uncertainty and the Interpretation of Mining Landscapes at Písečný vrch (Czech Republic)

Archaeological Prospection, EarlyView.
ABSTRACT We investigated the Písečný vrch (Czech Republic), a site exploited for quartz mining in both prehistoric times and the 20th century. Due to their morphological similarity across all mining periods, the differentiation between pits with archaeological potential and recent ones is challenging.
Jan Fišer, Petr Krištuf, Jan Kropáček, Vojtěch Barták, Lenka Starková, Vítězslav Moudrý   +5 more
wiley   +1 more source

Adaptive branching in source-sink habitats

, 2009
Evolution and ecological diversification in a heterogeneous environment is driven by an often complex interplay between local adaptation and dispersal between different habitat types.
Ripa, Jörgen, Holmér, Jennie, Jennie Nilsson, Jörgen Ripa   +3 more
core   +1 more source

Biomass distribution and allocation in diploid potato varieties (Solanum phureja Juz. et Buk.)

Agronomía Colombiana, 2015
It is necessary to study the photosynthate distribution pattern and allocation in Guaneña and Latina potato varieties, which come from the Colombia variety and are relatively new in agriculture, for potato crops in Colombia.
Tatiana M. Saldaña V., Jenniffer A. Patiño, José Miguel Cotes-Torres   +2 more
doaj   +1 more source