Results 41 to 50 of about 2,029 (183)

Rotation Curves of Galaxies: A New Theoretical Approach and Comparison With Observations

open access: yesAdvances in Astronomy, Volume 2026, Issue 1, 2026.
Observational results on the rotation curve of a rotating galaxy are used in thought experiments. A binary system is inserted in the galaxy, and equations for radial accelerations of the two bodies are found. Similarly, a single body is inserted in a multicomponent galaxy, and an equation for radial acceleration of the body is discussed.
J. Klačka, Sándor Frey
wiley   +1 more source

Letters to the Editor

open access: yesОбщая реаниматология, 2008
The editorial proposes a new classification of acute respiratory distress syndrome (ARDS). Acute lung injury (ALI) is regarded as the first stage of ARDS.
O. A. Dolina
doaj   +1 more source

The effect of basalt glass microspheres and microfibers on the wear resistance of metakaolin‐based geopolymer composites

open access: yesInternational Journal of Applied Ceramic Technology, Volume 22, Issue 6, November/December 2025.
Abstract This study investigates the effect of various microfillers on the abrasion resistance of metakaolin‐based, geopolymer composites. Comparative tests were conducted on a baseline geopolymer and composites reinforced with chamotte powder, basalt microfiber, prestressed, solid, basalt glass microspheres (PSBGM), and their combinations.
Yurii Y. Zubko   +2 more
wiley   +1 more source

AVALIAÇÃO MACROSCÓPICA DAS FEIÇÕES CÁRSTICAS DA FORMAÇÃO SALITRE NA FOLHA IRECÊ ( SC.24-Y-C-I ) COMO RESERVATÓRIOS PARA ÁGUA SUBTERRÂNEA

open access: yesRevista Águas Subterrâneas, 2006
A folha de Irecê, na escala 1:100.000 limitada pelas latitutes 11o 00’ a 11o 30’ S e 41o 30’ a 42o 00’ W é coberta predominantemente com rochas carbonatadas da Formação Salitre, com feições cársticas desenvolvidas, que juntamente com zonas de ...
Valdir Jose Beraldo
doaj  

Dolines and Sinkholes: Aspects of Evolution and Problems of Classification

open access: yesActa Carsologica, 2016
»Doline«, mednarodni izraz za vrtačo, je najbolj razširjena površinska oblika na krasu. Ime izhaja iz slovanske besede »dolina«, ki pomeni depresijo v topografskem površju.
Ugo Sauro
doaj   +1 more source

Investigating the Mechanism of Antimycobacterial and Antiproliferative Activity of (E)‐N’‐Benzylidenepyrazine‐2‐Carbohydrazides and their Derivatives

open access: yesChemMedChem, Volume 20, Issue 18, September 25, 2025.
(E)‐N’‐benzylidenepyrazine‐2‐carbohydrazides with 2‐OH, 2,3‐diOH or 2,4‐diOH substitution exhibit good antimycobacterial or antiproliferative activity, and iron chelation similar to salicylaldehyde isonicotinoyl hydrazone (SIH). A series of 33 (E)‐N’‐benzylidenepyrazine‐2‐carbohydrazides and their derivatives were synthesized and tested for biological ...
Priam‐Amedeo Houngbedji   +14 more
wiley   +1 more source

Stratigraphy and geomorphology of Des‐Cubierta Cave (Pinilla del Valle, Madrid, Spain): Geological insights into a Neanderthal symbolic accumulation of large crania

open access: yesJournal of Quaternary Science, Volume 40, Issue 6, Page 958-976, August 2025.
ABSTRACT Des‐Cubierta Cave, part of the Calvero de la Higuera complex, is situated in the intramountainous upper valley of the Lozoya River within the Guadarrama Range. The cave's geological, palaeontological, and archaeological record reveals a complex history of sedimentary and anthropogenic processes spanning hundreds of thousands of years ...
David Manuel Martín‐Perea   +19 more
wiley   +1 more source

Import substitution as a factor of stabilization of the Russian budget system

open access: yesПутеводитель предпринимателя, 2020
The effect of economic and trade sanctions on the development of import substitution and state of the budget system in Russia. Examples of investment projects aimed at implementing the policy of import substitution.
O. N. Dolina
doaj  

Assessment of therapeutic qualities of ten public parks in Bydgoszcz

open access: yesBudownictwo i Architektura, 2019
This paper presents a binary rough assessment of ten public parks in Bydgoszcz, followed by a detailed assessment of one of them – Dolina Pięciu Stawów.
Monika Trojanowska
doaj   +1 more source

Geofond 1.0 až 4.0: digitálne srdce geologických dát Slovenska

open access: yesGeologické práce. Správy
Geofond was established in 1952 as the central geological data repository of the former Czechoslovakia and now forms an integral part of the State Geological Institute of Dionýz Štúr (ŠGÚDŠ). Its core mission is the systematic collection, processing, and
Jozef Mižák   +5 more
doaj   +1 more source

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