Results 31 to 40 of about 5,901,140 (292)

Palatini Variational Principle for an Extended Einstein-Hilbert Action [PDF]

open access: yesPhys.Rev. D57 (1998) 4754-4759, 1997
We consider a Palatini variation on a generalized Einstein-Hilbert action. We find that the Hilbert constraint, that the connection equals the Christoffel symbol, arises only as a special case of this general action, while for particular values of the coefficients of this generalized action, the connection is completely unconstrained.
arxiv   +1 more source

Annotated checklist of fishes from Monterey Bay National Marine Sanctuary with notes on extralimital species [PDF]

open access: yesZooKeys, 2019
Monterey Bay National Marine Sanctuary is a federal, marine protected area located off the central coast of California, USA. Understanding biodiversity, and how it is changing, is necessary to effectively manage the sanctuary.
Erica J. Burton, Robert N. Lea
doaj   +3 more sources

Design of a New Type of Compact Chemical Heater for Isothermal Nucleic Acid Amplification

open access: yesPLoS ONE, 2015
Previous chemical heater designs for isothermal nucleic acid amplification have been based on solid-liquid phase transition, but using this approach, developers have identified design challenges en route to developing a low-cost, disposable device. Here,
K. G. Shah   +7 more
semanticscholar   +1 more source

Environmental transcriptomics under heat stress: Can environmental RNA reveal changes in gene expression of aquatic organisms?

open access: yesMolecular Ecology, EarlyView., 2023
Abstract To safeguard biodiversity in a changing climate, taxonomic information about species turnover and insights into the health of organisms are required. Environmental DNA approaches are increasingly used for species identification, but cannot provide functional insights.
Robert M. Hechler   +3 more
wiley   +1 more source

Dietary fiber and probiotics influence the gut microbiome and melanoma immunotherapy response

open access: yesScience, 2021
Description Another benefit of dietary fiber The gut microbiome can modulate the immune system and influence the therapeutic response of cancer patients, yet the mechanisms underlying the effects of microbiota are presently unclear. Spencer et al. add to
C. Spencer   +88 more
semanticscholar   +1 more source

What is available to support pain management in Parkinson’s: a scoping review protocol

open access: yesInternational Journal for Equity in Health, 2023
Objective A scoping review will be undertaken to examine and map the available evidence that has been produced in relation to pain management in Parkinson’s, with a focus on behavioural interventions, resources and/or how professionals support people ...
Mark Parkinson   +9 more
doaj   +1 more source

Piloting wastewater-based surveillance of norovirus in England

open access: yesmedRxiv
Wastewater-based epidemiology (WBE) gained widespread use as a tool for supporting clinical disease surveillance during the COVID-19 pandemic. There is now significant interest in the continued development of WBE for other pathogens of clinical ...
D. I. Walker   +14 more
semanticscholar   +1 more source

Discovery of a Nearby Low-Surface-Brightness Spiral Galaxy [PDF]

open access: yes, 1998
During the course of a search for compact, isolated gas clouds moving with anomalous velocities in or near our own Galaxy (Braun and Burton 1998 A&A, in press), we have discovered, in the data of the Leiden/Dwingeloo survey (Hartmann and Burton 1997, Atlas of Galactic Neutral Hydrogen, CUP) of Galactic hydrogen, the HI signature of a large galaxy ...
arxiv   +1 more source

The Apache Point Observatory Galactic Evolution Experiment (APOGEE) [PDF]

open access: yes, 2007
The Apache Point Observatory Galactic Evolution Experiment (APOGEE), one of the programs in the Sloan Digital Sky Survey III (SDSS-III), has now completed its systematic, homogeneous spectroscopic survey sampling all major populations of the Milky Way ...
S. Majewski   +78 more
semanticscholar   +1 more source

Compact High-Velocity Clouds at High Resolution [PDF]

open access: yes, 1999
Six examples of the compact, isolated high-velocity clouds catalogued by Braun & Burton (1999) and identified with a dynamically cold ensemble of primitive objects falling towards the barycenter of the Local Group have been imaged with the Westerbork Synthesis Radio Telescope; an additional ten have been imaged with the Arecibo telescope.
arxiv   +1 more source

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