Results 41 to 50 of about 32,030 (214)

Modified f(G) gravity models with curvature-matter coupling

open access: yes, 2012
A modified f(G) gravity model with coupling between matter and geometry is proposed, which is described by the product of the Lagrange density of the matter and an arbitrary function of the Gauss-Bonnet term.
A.D. Dolgov   +68 more
core   +1 more source

Five-dimensional generalized $f(R)$ gravity with curvature-matter coupling [PDF]

open access: yes, 2014
The generalized $f(R)$ gravity with curvature-matter coupling in five-dimensional (5D) spacetime can be established by assuming a hypersurface-orthogonal spacelike Killing vector field of 5D spacetime, and it can be reduced to the 4D formulism of FRW ...
Lu, Jun-Wang   +5 more
core   +2 more sources

Optimization of Parsimonious and Synchronized Discharge and Dissolved Organic Carbon Models Across Catchment Scales

open access: yesWater Resources Research, Volume 62, Issue 5, May 2026.
Abstract The production, transport, loss, and export of dissolved organic carbon (DOC) are closely connected with hydrometeorological drivers. While terrestrial production depends on biogeochemical variables like soil moisture, air temperature, and the contact area between water and organic matter sources, export is determined by water availability and
Juan Pesántez   +7 more
wiley   +1 more source

Agrarian counterpoint

open access: yesAmerican Ethnologist, Volume 53, Issue 2, Page 171-182, May 2026.
Abstract In Colombia's northeastern borderlands, agrarian economies shape how disease risk and stigma are understood and managed. As shown in ethnographic fieldwork in and around the Catatumbo region, cutaneous leishmaniasis—a sandfly‐transmitted disease that produces chronic skin lesions—appears in two radically different guises across adjacent ...
Javier Lezaun, Lina Pinto‐García
wiley   +1 more source

Biogeochemical ecology of six species of Sphagnum in Costa Rica [PDF]

open access: yes, 1992
There is very little information on the biogeochemical ecology of Sphagnum species in tropical regions. The majority of the ecological information on Sphagnum species in the tropics consists of general habitat information and pH values that are reported ...
McQueen, Cyrus B., Wolfe, John
core  

(Non-) geodesic motion in chameleon Brans Dicke model

open access: yes, 2013
Based on \cite{16}, we assume there is a non-minimal coupling between the scalar field and matter in Brans-Dicke model. We analyzes the motion of different matter such as, massless scalar field, photon, massless perfect fluid (dust), massive perfect ...
Saaidi, Khaled
core   +1 more source

Hybrid modified gravity unifying local tests, galactic dynamics and late-time cosmic acceleration [PDF]

open access: yes, 2013
The non-equivalence between the metric and Palatini formalisms of $f(R)$ gravity is an intriguing feature of these theories. However, in the recently proposed hybrid metric-Palatini gravity, consisting of the superposition of the metric Einstein-Hilbert ...
Capozziello, Salvatore   +3 more
core   +2 more sources

The catch of the day: The shortcomings of promoting sustainable seafood consumption in Peru

open access: yesConservation Science and Practice, Volume 8, Issue 5, May 2026.
This study investigates the meaning and application of “catch of the day” in Peru by analyzing 233 news articles and genetically testing 43 fish samples from restaurants. Results show that media frequently use the term as a vague marketing phrase, while genetic testing reveals a 60% mislabeling rate. These findings suggest that “catch of the day” lacks
Daniella Biffi   +2 more
wiley   +1 more source

Socialinės paramos, teikiamos Ukrainos karo pabėgėliams, analizė

open access: yesMokslo Taikomieji Tyrimai
Straipsnyje nagrinėjama socialinė parama, besitęsiant Rusijos agresijai, teikiama Lietuvoje Ukrainos karo pabėgėliams, susiduriantiems su įvairiais iššūkiais bandant prisitaikyti prie naujos aplinkos.
Lijana Simsonienė, Aristida Čepienė
doaj   +1 more source

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