Results 81 to 90 of about 12,779 (195)

Inter‐Period and Inter‐Season Variability of Zooplankton of a Mountain Lake With an Emphasis on Under‐Ice Communities

open access: yesFreshwater Biology, Volume 70, Issue 8, August 2025.
ABSTRACT Only recently the under‐ice period is recognised as a time of plankton activity. However, most studies on under‐ice zooplankton focus on low‐land lakes over relatively short temporal scales; long‐term under‐ice zooplankton dynamics in mountain lakes remain largely unknown. We compared the under‐ice zooplankton community (one sampling per year;
Ulrike Obertegger   +2 more
wiley   +1 more source

TRES MOMENTOS DE UNA CONSTRUCCIÓN GEOMÉTRICA: APOLLONIUS DE PERGA, FRANÇOIS VIETE, JOSEPH-DIEZ GERGONNE*

open access: yesRevista Brasileira de História da Matemática, 2020
La tradición matemática –en este caso geométrica- se explicita en la construcción de un círculo tangente a tres círculos dados sobre el plano. De la pléyade de geómetras que la intentan hemos tomado sólo a tres.
Mario H. Otero
doaj   +1 more source

Strong Under‐Ice Heating of Central Asian Shallow Lakes

open access: yesGeophysical Research Letters, Volume 52, Issue 14, 28 July 2025.
Abstract Shallow lakes (<2 m depth) of Central Asian, receiving strong solar radiation and low precipitation, are sensitive to atmospheric forcing because of their low heat capacity, yet their under‐ice thermal conditions remain poorly investigated.
Puzhen Huo   +6 more
wiley   +1 more source

THE PARTICIPATION OF UKRAINIAN POLITICAL PARTIES OF CHELM AND PODLASIE REGIONS IN PARLIAMENTARY ELECTIONS SECOND POLISH REPUBLIC IN 1928 [PDF]

open access: yesStorìnki Istorìï, 2016
In the article the participation of Ukrainian political forces Holm and Podlasie in parliamentary elections Second Polish Republic in 1928 is investigated.
I. Perga
doaj  

Using Long‐Term Ecological Datasets to Unravel the Impacts of Short‐Term Meteorological Disturbances on Phytoplankton Communities

open access: yesFreshwater Biology, Volume 70, Issue 5, May 2025.
ABSTRACT Extreme meteorological events such as storms are increasing in frequency and intensity, but our knowledge of their impacts on aquatic ecosystems and emergent system properties is limited. Understanding the ecological impacts of storms on the dynamics of primary producers remains a challenge that needs to be addressed to assess the ...
Viet Tran‐Khac   +30 more
wiley   +1 more source

Transition from wave turbulence to dynamical crumpling in vibrated elastic plates

open access: yes, 2013
We study the dynamical regime of wave turbulence of a vibrated thin elastic plate based on experimental and numerical observations. We focus our study to the strongly non linear regime described in a previous letter by N. Yokoyama & M. Takaoka.
Alexakis, Alexandros   +3 more
core   +3 more sources

Spiral-Logarithmic Structure in a Heisenberg Ferromagnet

open access: yes, 2001
Spiral-logarithmic structure is suggested as a stationary solution of a modified equation for the Heisenberg model, and the single- and N-soliton solutions are constructed on this base.Comment: LaTeX, 5 pages, no ...
Gutshabash, E. Sh.
core   +1 more source

Lift force due to odd (Hall) viscosity

open access: yes, 2016
We study the problem of flow of a neutral gas past an infinite cylinder at right angle to its axis at low Reynolds number when the fluid is characterized by broken time-reversal invariance, and hence by odd viscosity in addition to the normal even one ...
Kogan, E.
core   +1 more source

Slow flows of an relativistic perfect fluid in a static gravitational field

open access: yes, 2000
Relativistic hydrodynamics of an isentropic fluid in a gravitational field is considered as the particular example from the family of Lagrangian hydrodynamic-type systems which possess an infinite set of integrals of motion due to the symmetry of ...
B. A. Dubrovin   +11 more
core   +1 more source

On Fibonacci Knots [PDF]

open access: yes, 2009
We show that the Conway polynomials of Fibonacci links are Fibonacci polynomials modulo 2. We deduce that, when $ n \not\equiv 0 \Mod 4$ and $(n,j) \neq (3,3),$ the Fibonacci knot $ \cF_j^{(n)} $ is not a Lissajous knot.Comment: 7p ...
Koseleff, Pierre-Vincent, Pecker, Daniel
core   +2 more sources

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