Results 111 to 120 of about 66,871 (307)
Climate change and perennial crop production: Evidence of yield impact and adaptation in California
American Journal of Agricultural Economics, EarlyView.Abstract Perennial crops are economically important. They contribute to food security, providing essential nutrients that are often lacking in annual crops, and provide additional environmental benefits compared with annual crops. Despite their importance, empirical research on the impacts of climate change and adaptation on perennial crops remains ...
Yuanyuan Wen +2 more
wiley +1 more source
Involutory biquandles and singular knots and links
Open Mathematics, 2018 We define a new algebraic structure for singular knots and links. It extends the notion of a bikei (or involutory biquandle) from regular knots and links to singular knots and links. We call this structure a singbikei.
Bataineh Khaled, Ghaith Hadeel
doaj +1 more source
, 2010 Optical vortices form three-dimensional lines of darkness in scalar light. They are places where the phase becomes undefined and hence singular in value.
King, Robert Paul
core
Alzheimer's Disease Co‐Pathology and Cognitive Impairment in Amyotrophic Lateral Sclerosis
Annals of Neurology, EarlyView.Objectives Amyotrophic lateral sclerosis (ALS) and Alzheimer's disease (AD) share neuropathological features, including tau, amyloid, and TDP‐43 pathology. This study investigated whether AD‐related pathological changes are associated with cognitive impairment ALS. Methods Cerebrospinal fluid (CSF total‐tau, phosphorylated‐tau, beta‐amyloid) and plasma
Elisabeth Kasper +29 more
wiley +1 more source
Approximating ideal shapes with tight elements
, 2005 A variational approach is applied to the problem of finding the shortest curves in space separated by constant distance. Among particular extremal solutions are straight line, circular arc and double helix. Various knots and links may be assembled from
Starostin, E., Starostin, E.L.
core
BuildingsTimber has gained popularity in the construction industry in recent years due to its low carbon footprint, favorable seismic performance, and esthetic appeal.
Ya Ou +4 more
doaj +1 more source
Composite Knots Obtained by Twisting Torus Knots
, 2017 A twisted torus knot is obtained from a torus knot by performing full twists on some adjacent strands of the torus knot. Morimoto constructed infinitely many twisted torus knots which are composite knots and he conjectured that his knots are all of ...
Sangyop Lee
core +1 more source
Detección de nudos en madera con técnicas de microondas
Maderas: Ciencia y Tecnología, 2014 En este trabajo se lleva a cabo un estudio preliminar de detección de nudos en madera sólida creciente en Chile, por medio de la utilización de radiación de microondas.
E. Baradit, R. Aedo, J. Correa
doaj
, 2016 The cover image for Knots Issue #2 was painted by Aysha Natsheh. The Front cover of the journal is set on a pale blue watercolour background, with a brown hand emerges from the top of the page. The hand\u27s fingers are curled slightly towards the right.
Natsheh, Aysha
core
Journal of Applied Polymer Science, EarlyView.Kevlar is traditionally modeled as a rigid‐rod polymer, yet rheological behavior deviates from this assumption. The review introduces a novel “twist‐tie” entanglement theory for aramid polymer chains in the nematic liquid crystal state, providing a molecular explanation for deviations from rigid‐rod models. Understanding twist‐tie entanglement dynamics
Emma Egli +3 more
wiley +1 more source