scholarly journals Discrimination of small sugar concentration differences helps the nectar-feeding bat Leptonycteris yerbabuenae cover energetic demands

2020 ◽  
Vol 223 (18) ◽  
pp. jeb215053 ◽  
Author(s):  
Michael H. Walter ◽  
Aaron Verdong ◽  
Vanessa Olmos ◽  
Christina C. Weiss ◽  
Lisa-Ruth Vial ◽  
...  
Keyword(s):  
High Energy ◽  
Sugar Concentration ◽  
Entire Concentration Range ◽  
Physiological Constraints ◽  
Nectar Feeding ◽  
Energy Needs ◽  
Very High Energy ◽  
Leptonycteris Yerbabuenae ◽  
Very High ◽  
Better Than

ABSTRACTEvery day nectar-feeding animals face an energetic challenge during foraging: they must locate and select flowers that provide nectar with adequate amounts of sugar to cover their very high energy needs. To understand this decision-making process, it is crucial to know how accurately sugar concentration differences can be discriminated. In a controlled laboratory setting, we offered the nectar-specialist bat Leptonycteris yerbabuenae the choice between different sugar solutions covering the entire concentration range of bat-pollinated plants (3–33%). When feeding on solutions below 10% sugar concentration, L. yerbabuenae were unable to cover their energetic demands because of physiological constraints. Their ability to discriminate sugar concentrations was better than that of any other nectar-feeding animal studied to date. At sugar concentrations below 15%, L. yerbabuenae can discriminate solutions differing by only 0.5%. The bats may utilize this fine-tuned ability to select nectar from flowers with reward qualities that provide them with the necessary amount of energy to survive.

scholarly journals Two-sided constraints on Lorentz invariance violation from Tibet-AS$$\gamma $$ and LHAASO very-high-energy photon observations

2021 ◽  
Vol 81 (8) ◽  
Author(s):  
Petr Satunin
Keyword(s):  
Gamma Ray ◽  
Lorentz Invariance ◽  
High Energy ◽  
Energy Scale ◽  
Production Constraints ◽  
Invariance Violation ◽  
Lorentz Invariance Violation ◽  
Very High Energy ◽  
Very High ◽  
Better Than

AbstractWe present new two-sided constraints on the Lorentz Invariance violation energy scale for photons with quartic dispersion relation from recent gamma ray observations by the Tibet-AS$$\gamma $$ γ and LHAASO experiments. The constraints are based on the consideration of the processes of photon triple splitting (superluminal scenario) and the suppression of shower formation (subluminal). The constraints in the subluminal scenario are better than the pair production constraints and are the strongest in the literature.

Strong interactions at very high energy

1964 ◽  
Vol 82 (1) ◽  
pp. 3-81 ◽  
Author(s):  
Evgenii L. Feinberg ◽  
Dmitrii S. Chernavskii
Keyword(s):  
High Energy ◽  
Strong Interactions ◽  
Very High Energy ◽  
Very High

scholarly journals Focused VHEE (very high energy electron) beams and dose delivery for radiotherapy applications

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
L. Whitmore ◽  
R. I. Mackay ◽  
M. van Herk ◽  
J. K. Jones ◽  
R. M. Jones
Keyword(s):  
Electron Beams ◽  
Focal Point ◽  
External Beam Radiotherapy ◽  
High Energy ◽  
Energy Electron ◽  
High Energy Electron ◽  
Dose Delivery ◽  
Entrance Dose ◽  
Very High Energy ◽  
Very High

AbstractThis paper presents the first demonstration of deeply penetrating dose delivery using focused very high energy electron (VHEE) beams using quadrupole magnets in Monte Carlo simulations. We show that the focal point is readily modified by linearly changing the quadrupole magnet strength only. We also present a weighted sum of focused electron beams to form a spread-out electron peak (SOEP) over a target region. This has a significantly reduced entrance dose compared to a proton-based spread-out Bragg peak (SOBP). Very high energy electron (VHEE) beams are an exciting prospect in external beam radiotherapy. VHEEs are less sensitive to inhomogeneities than proton and photon beams, have a deep dose reach and could potentially be used to deliver FLASH radiotherapy. The dose distributions of unfocused VHEE produce high entrance and exit doses compared to other radiotherapy modalities unless focusing is employed, and in this case the entrance dose is considerably improved over existing radiations. We have investigated both symmetric and asymmetric focusing as well as focusing with a range of beam energies.

Very high energy nucleus-nucleus collisions and multi-chain model

1981 ◽  
Vol 8 (3) ◽  
pp. 205-213 ◽  
Author(s):  
Kisei Kinoshita ◽  
Akira Minaka ◽  
Hiroyuki Sumiyoshi
Keyword(s):  
High Energy ◽  
Chain Model ◽  
Very High Energy ◽  
Very High

scholarly journals Fermi LARGE AREA TELESCOPE DETECTION OF TWO VERY-HIGH-ENERGY ( E > 100 GeV) γ-RAY PHOTONS FROM THE z = 1.1 BLAZAR PKS 0426–380

2013 ◽  
Vol 777 (1) ◽  
pp. L18 ◽  
Author(s):  
Y. T. Tanaka ◽  
C. C. Cheung ◽  
Y. Inoue ◽  
Ł. Stawarz ◽  
M. Ajello ◽  
...  
Keyword(s):  
High Energy ◽  
Large Area ◽  
Very High Energy ◽  
Γ Ray ◽  
Very High

Very-high-energy light charged-particle production near 0° in heavy-ion collisions, 9≤E/A≤40 MeV

1990 ◽  
Vol 42 (4) ◽  
pp. 1519-1529 ◽  
Author(s):  
S. Shaheen ◽  
F. D. Becchetti ◽  
D. A. Roberts ◽  
J. W. Jänecke ◽  
R. L. Stern ◽  
...  
Keyword(s):  
Charged Particle ◽  
Heavy Ion Collisions ◽  
Particle Production ◽  
Heavy Ion ◽  
High Energy ◽  
Light Charged Particle ◽  
Ion Collisions ◽  
Charged Particle Production ◽  
Very High Energy ◽  
Very High

scholarly journals Cross section to multiplicity ratios at very high energy

2014 ◽  
Vol 734 ◽  
pp. 207-209 ◽  
Author(s):  
M.M. Block ◽  
L. Stodolsky
Keyword(s):  
Cross Section ◽  
High Energy ◽  
Very High Energy ◽  
Very High
Sign in / Sign up

Export Citation Format

Share Document