Results 31 to 40 of about 4,659,127 (281)

Local extremality of the Calabi-Croke sphere for the length of the shortest closed geodesic [PDF]

open access: yes, 2009
Recently, F. Balacheff proved that the Calabi-Croke sphere made of two flat 1-unit-side equilateral triangles glued along their boundaries is a local extremum for the length of the shortest closed geodesic among the Riemannian spheres with conical ...
Sabourau, Stephane
core   +4 more sources

Prioritising the best use of biomass resources: conceptualising trade-offs [PDF]

open access: yes, 2010
02.09.13 KB. Ok to add report to Spiral. Authors hold copyrightUsing biomass to provide energy services is one of the most versatile options for increasing the proportion of renewable energy in the existing system.
Bauen, A, Gross, R, Slade, R
core   +1 more source

Complementary and alternative metrics for tracking population-level trends in child linear growth.

open access: yesPLOS Global Public Health, 2023
Stunting prevalence is commonly used to track population-level child nutritional status. However, other metrics derived from anthropometric datasets may be used as alternatives to stunting or provide complementary perspectives on the status of linear ...
Ashley M Aimone   +7 more
doaj   +1 more source

The relationship between citations, downloads and alternative metrics in rheumatology publications: a bibliometric study.

open access: yesRheumatology, 2019
OBJECTIVE Scientific journals and authors are frequently judged on 'impact'. Commonly used traditional metrics are the Impact Factor and H-index. However, both take several years to formulate and have many limitations.
Winnie M Y Chen   +3 more
semanticscholar   +1 more source

Analysis of Alternative Metrics for the PAPR Problem in OFDM Transmission

open access: yes, 2011
The effective PAPR of the transmit signal is the standard metric to capture the effect of nonlinear distortion in OFDM transmission. A common rule of thumb is the log$(N)$ barrier where $N$ is the number of subcarriers which has been theoretically ...
Wunder, Gerhard
core   +1 more source

Bumpy Black Holes in Alternate Theories of Gravity

open access: yes, 2011
We generalize the bumpy black hole framework to allow for alternative theory deformations. We construct two model-independent parametric deviations from the Kerr metric: one built from a generalization of the quasi-Kerr and bumpy metrics and one built ...
A. K. Piotr Jaranowski   +10 more
core   +1 more source

Systematic analysis of agreement between metrics and peer review in the UK REF [PDF]

open access: yes, 2019
When performing a national research assessment, some countries rely on citation metrics whereas others, such as the UK, primarily use peer review. In the influential Metric Tide report, a low agreement between metrics and peer review in the UK Research ...
Traag, Vincent, Waltman, Ludo
core   +5 more sources

Impact of greenhouse gas metrics on the quantification of agricultural emissions and farm-scale mitigation strategies: a New Zealand case study

open access: yesEnvironmental Research Letters, 2013
Agriculture emits a range of greenhouse gases. Greenhouse gas metrics allow emissions of different gases to be reported in a common unit called CO _2 -equivalent. This enables comparisons of the efficiency of different farms and production systems and of
Andy Reisinger, Stewart Ledgard
doaj   +1 more source

Time-dependent kinetic energy metrics for Lagrangians of electromagnetic type

open access: yes, 2011
We extend the results obtained in a previous paper about a class of Lagrangian systems which admit alternative kinetic energy metrics to second-order mechanical systems with explicit time-dependence. The main results are that a time-dependent alternative
Krupkova, O.   +3 more
core   +2 more sources

An Environmental Scan of Bibliometrics and Research Impact Open Instructional Trends at Canadian Academic Research Libraries

open access: yesCanadian Journal of Academic Librarianship
While bibliometrics have been used for years in academia, recent conversations into their responsible use have driven a need for greater understanding of bibliometrics and research impact within the academic community.
Megan Palmer, Laura Bredahl, Kari Weaver
doaj   +1 more source

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