Results 51 to 60 of about 856,080 (316)

Influences of an Arrow’s Aerodynamic Pressure Center on Recurve Bow Shooting

open access: yesApplied Sciences
An arrow’s attack angle continuously changes during its flight, which affects the position of the aerodynamic pressure center. To account for the offset between the aerodynamic pressure center and the center of mass of an arrow in recurve bow shooting ...
Wenfeng Shen   +5 more
doaj   +1 more source

Arrow Contraction and Expansion in Tropical Diagrams

open access: yesEntropy, 2023
Arrow contraction applied to a tropical diagram of probability spaces is a modification of the diagram, replacing one of the morphisms with an isomorphism while preserving other parts of the diagram.
Rostislav Matveev, Jacobus W. Portegies
doaj   +1 more source

Microbial exopolysaccharide production by polyextremophiles in the adaptation to multiple extremes

open access: yesFEBS Letters, EarlyView.
Polyextremophiles are microorganisms that endure multiple extreme conditions by various adaptation strategies that also include the production of exopolysaccharides (EPSs). This review provides an integrated perspective on EPS biosynthesis, function, and regulation in these organisms, emphasizing their critical role in survival and highlighting their ...
Tracey M Gloster, Ebru Toksoy Öner
wiley   +1 more source

A detailed protocol to enable safe-handling, preemptive detection, and systematic surveillance of rat-vectored pathogens in the urban environment

open access: yesFrontiers in Public Health, 2016
We detail a five-stage protocol to address physical barriers and experimental limitations that have hindered routine pathogen monitoring of wild rats in urban settings.
Michael H Parsons   +2 more
doaj   +1 more source

Categorical semantics for arrows [PDF]

open access: yesJournal of Functional Programming, 2009
AbstractArrows are an extension of the well-established notion of a monad in functional-programming languages. This paper presents several examples and constructions and develops denotational semantics of arrows as monoids in categories of bifunctorsCop×C→C.
Jacobs, B.P.F.   +4 more
openaire   +5 more sources

The nicotinamide hypothesis revisited—plant defense signaling integrating PARP, nicotinamide, nicotinic acid, epigenetics, and glutathione

open access: yesFEBS Letters, EarlyView.
Nicotinamide (NIC) and nicotinic acid (NIA) are proposed as stress signaling compounds in plants. Oxidative stress may lead to single strand breaks (SSB) in DNA, which activate poly(ADP‐ribose) polymerase (PARP). NIC and NIA are then formed from NAD. NIC and NIA can promote epigenetic changes leading to the expression of defense genes specific for the ...
Torkel Berglund, Anna B. Ohlsson
wiley   +1 more source

Jump-starting urban rat research: Conspecific pheromones recruit wild rats into a behavioral and pathogen-monitoring assay

open access: yesFrontiers in Ecology and Evolution, 2015
Wild rats, Rattus spp, have adapted so well to urbanization that humans may be obligatory to their survival. Consequently, rats foul human food sources, predate threatened fauna and serve as reservoirs for disease, costing the US economy $19 billion in ...
Michael H Parsons   +3 more
doaj   +1 more source

Arrow Wounds [PDF]

open access: yesScientific American, 1881
n ...
openaire   +2 more sources

Structural dynamics of the plant hormone receptor ETR1 in a native‐like membrane environment

open access: yesFEBS Letters, EarlyView.
The present study unveils the structural and signaling dynamics of ETR1, a key plant ethylene receptor. Using an optimized nanodisc system and solution NMR, we captured full‐length ETR1 in a native‐like membrane environment. Our findings reveal dynamic domain uncoupling and Cu(I)‐induced rigidification, providing the first evidence of metal‐triggered ...
Moritz Lemke   +2 more
wiley   +1 more source

Throwing Angle Estimation of a Wire Installation Device with Robotic Arm Using a 3D Model of a Spear

open access: yesInventions
In recent years, the deterioration of social infrastructure such as bridges has become a serious issue in many countries around the world. To maintain the functionality of aging bridges over the long term, it is necessary to conduct regular inspections ...
Yuji Kobayashi   +4 more
doaj   +1 more source

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