Results 51 to 60 of about 8,086 (212)

Conodont dating of some Telychian (Silurian) sections in Estonia [PDF]

, 2008
Several Telychian–Sheinwoodian strata exposed in Estonia are precisely dated using conodont biostratigraphy. The beds in the Valgu-1 section correspond to the uppermost Distomodus staurognathoides and Pterospathodus eopennatus ssp. n. 1 zones.
Männik, Peep
core   +1 more source

Near‐Synchronous Cambrian Evolution of the Transbrasiliano‐Kandi‐4°50′ Shear Zone in South America and Africa

Terra Nova, EarlyView.
ABSTRACT The Transbrasiliano‐Kandi‐4°50′ (TK4) shear zone in western Gondwana crosscuts South America and NW Africa for at least 6000 km. Despite its impressive size, the timing of the main episode of dextral ductile shearing is uncertain. We present detailed in situ multi‐mineral geochronology of mylonites from both Brazil and Algeria supporting that ...
F. A. Caxito, B. V. Ribeiro, F. Alkmim, A. Deramchi, C. L. Kirkland   +4 more
wiley   +1 more source

The use of multiple regression analysis to study the relationship between the amplitudes of EEG rhythms within one derivation with mental retardation

Journal of Education, Health and Sport, 2023
Using the calculation of coefficients of multiple linear regression and two-dimensional correlation, we studied the mutual influence (functional connectivity) between the amplitudes of EEG rhythms within one lead in mentally retarded persons.
B. Lobasyuk, L. Bartsevich, A. Zamkovaya
doaj   +1 more source

Laguna Fuente de Piedra: An example of a dolomite factory recording ~50,000 years of depositional and paleoclimatic evolution

The Depositional Record, Volume 12, Issue 1, February 2026.
This study characterises carbonate mineral precipitation mechanisms and their paleoenvironmental implications in a semi‐arid, saline playa lake system. SEM image with EDS spectra shows microcrystalline, spherical shaped dolomite crystals from Laguna Fuente de Piedra composed of nanocrystals with bacterial voids and EPS.
Zeina Naim, Guolai Li, Luis Gibert, Jan‐Berend Stuut, Gonzalo Jiménez‐Moreno, Mónica Sánchez‐Román   +5 more
wiley   +1 more source

Some physiological properties of dextral and of sinistral forms in Bacillus mycoides Flügge [PDF]

Protoplasma, 1939
1. The investigation of different physiological properties of dextral and of sinistral forms of Bacillus mycoides shows that in the basic features of their metabolism these strains coincide with one another. Both in sinistral and in dextral strains the natural dextrorotatory arginine proves to be more suitable material for growth than the racemic ...
openaire   +3 more sources

Helicity at Photospheric and Chromospheric Heights

, 2009
In the solar atmosphere the twist parameter $\alpha$ has the same sign as magnetic helicity. It has been observed using photospheric vector magnetograms that negative/positive helicity is dominant in the northern/southern hemisphere of the Sun ...
AA Pevtsov, AA Pevtsov, AA Pevtsov, AA Pevtsov, AA Pevtsov, AB Burnette, D Sokoloff, DF Elmore, DM Rust, GE Hale, J Chae, K Sankarasubramanian, KD Leka, M Hagino, MA Berger, MJ Hagyard, N Seehafer, PN Bernasconi, RS Richardson, S. Bao, SF Martin, SK Tiwari   +21 more
core   +1 more source

Geology, age and tectonic evolution of the Sierra Maestra Mountains, southeastern Cuba [PDF]

, 2006
We summarize the available geological information on the Sierra Maestra Mountains in southeastern Cuba and report new zircon fission track and biotite Ar-Ar ages for this region. Two different and genetically unrelated volcanic arc sequences occur in the
Bojar, A.V., García-Delgado, D.E., Handler, R., Hejl, E., Neubauer, F., Rojas-Agramonte, Y.   +5 more
core   +4 more sources

Design and Applications of Multi‐Frequency Programmable Metamaterials for Adaptive Stealth

Advanced Functional Materials, Volume 36, Issue 5, 15 January 2026.
This article provides a comprehensive overview of metamaterials, including their fundamental principles, properties, synthesis techniques, and applications in stealth, as well as their challenges and future prospects. It covers topics that are more advanced than those typically discussed in existing review articles, while still being closely connected ...
Jonathan Tersur Orasugh, Ankita Mohanty, Amit Malakar, Suryasarathi Bose, Suprakas Sinha Ray   +4 more
wiley   +1 more source

Can We Determine the Filament Chirality by the Filament Footpoint Location or the Barb-bearing?

, 2015
We attempt to propose a method for automatically detecting the solar filament chirality and barb bearing. We first introduce the unweighted undirected graph concept and adopt the Dijkstra shortest-path algorithm to recognize the filament spine.
Cao, W., Chen, P. F., Fang, C., Guo, Y., Hao, Q.   +4 more
core   +1 more source

The kinematic history of the Khlong Marui and Ranong Faults, southern Thailand [PDF]

, 2008
The Khlong Marui Fault (KMF) and Ranong Fault (RF) are major NNE-trending strike-slip faults which dissect peninsular Thailand. They have been assumed to be conjugate to the NW-trending Three Pagodas Fault (TPF) and Mae Ping Fault (MPF) in Northern ...
Elders, Chris, Hall, Robert, Watkinson, Ian   +2 more
core   +1 more source