Results 161 to 170 of about 1,034 (248)

Pollinator efficiency, rather than bee decline, explains a shift to hummingbird pollination in tropical montane forests

New Phytologist, EarlyView.
Hummingbird pollination is a hallmark of American plant diversity and has long been thought to evolve in tropical mountains due to declining bee activity. Using sister species of Costus specialized on bees (C. kuntzei) and hummingbirds (C. wilsonii), we show that this shift is not driven by reduced bee visitation with elevation, but by greater ...
Pedro Juárez, Kathryn Gerhardt, Eden Hughes, Cecilia Girvin, Anise Dellith‐Moser, Dennis Tenorio, Annya Livak, Kathleen M. Kay   +7 more
wiley   +1 more source

Fitting an Origin-Displaced Logarithmic Spiral to Empirical Data by Differential Evolution Method of Global Optimization

Logarithmic spirals are abundantly observed in nature. Gastropods (such as nautilus, cowie, grove snail, thatcher, etc.) in the mollusca phylum have spiral shells, mostly exhibiting logarithmic spirals vividly. Spider webs show a similar pattern. The low-
Mishra, SK
core  

Multistability, Chaos, and Control in the Deterministic and Stochastic Dynamics of Noise-Driven Nonlinear Oscillators. [PDF]

Entropy (Basel)
Jhangeer A, Abdelkader A.
europepmc   +1 more source

Explaining hidden mechanisms: a generative model for causal graphs with nonlinear latent factors. [PDF]

Front Artif Intell
Maruhashi K, Park H, Yamaguchi R, Miyano S.   +3 more
europepmc   +1 more source

Systematics of Marmosa Subgenus Micoureus With Emphasis in ‘rapposa’ Group (Didelphidae, Marmosini): Geographic Variation and Revalidation of M. budini

Zoologica Scripta, EarlyView.
ABSTRACT Micoureus is the most species‐rich subgenus within the genus Marmosa. Conflicting arrangements regarding the number of species comprising this subgenus have been proposed and the validity of M. budini has been debated. Here, we used an approach integrating genetic and morphological data were conducted to reanalyze the ‘rapposa’ group ...
Maria Clara Santos Ribeiro, Aldo Caccavo, Joyce Rodrigues do Prado, Cibele Rodrigues Bonvicino   +3 more
wiley   +1 more source

Quantum Models of Consciousness from a Quantum Information Science Perspective. [PDF]

Entropy (Basel)
Gassab L, Pusuluk O, Cattaneo M, Müstecaplıoğlu ÖE.   +3 more
europepmc   +1 more source

Entanglement and logarithmic spirals in a quantum spin-1 many-body system with competing dimer and trimer interactions

Spontaneous symmetry breaking (SSB) with type-B Goldstone modes is investigated in the macroscopically degenerate phase for a quantum spin-1 many-body system with competing dimer and trimer interactions. The SSB involves three distinct patterns.
Zhou, Huan-Qiang, Shi, Qian-Qian, McCulloch, Ian P., Batchelor, Murray T.   +3 more
core  

Spaceborne and spaceborn: Physiological aspects of pregnancy and birth during interplanetary flight

Experimental Physiology, EarlyView.
Abstract Crewed interplanetary return missions that are on the planning horizon will take years, more than enough time for initiation and completion of a pregnancy. Pregnancy is viewed as a sequence of processes – fertilization, blastocyst formation, implantation, gastrulation, placentation, organogenesis, gross morphogenesis, birth and neonatal ...
Arun V. Holden
wiley   +1 more source

Energy-based analysis of biochemical oscillators using bond graphs and linear control theory. [PDF]

R Soc Open Sci
Gawthrop P, Pan M.
europepmc   +1 more source

A method of compensating for the excitability of spinal motoneurones when estimating the magnitude of potentials evoked in skeletal muscles

The Journal of Physiology, EarlyView.
Abstract figure legend There is positive covariation in the amplitudes of motor evoked potentials (MEPs) in skeletal muscles generated by transcranial magnetic stimulation (TMS) of the motor cortex and in fluctuations in the excitability of spinal motoneurones – as indexed by electromyography (EMG), in the period (e.g. 100 ms) immediately preceding the
Richard G. Carson
wiley   +1 more source