Results 71 to 80 of about 262,123 (211)
Rough sets based on Galois connections
International Journal of Applied Mathematics and Computer Science, 2020 Rough set theory is an important tool to extract knowledge from relational databases. The original definitions of approximation operators are based on an indiscernibility relation, which is an equivalence one.
Madrid Nicolás +2 more
doaj +1 more source
Speciation Diagrams in Some Metal Ions-H3PO4 System
International Journal of Electrochemical Science, 2020 There are no substitutes for phosphate rocks as raw materials in the production of phosphate fertilizers and phosphoric acid. We reviewed 222 published articles on purification in which approximately 75% of the studies corresponded to methods of ...
R. García-García +4 more
doaj +1 more source
Preliminary report on the Myrmeleontidae (Neuroptera) of Paraguay [PDF]
, 2010 Ten species of antlions are confirmed as present in Paraguay and seven additional species are suspected to be present there. All of the species are found also in Argentina and Brazil except for Eremoleon pulchra (Esben- Petersen) which is endemic to ...
Stange, Lionel A.
core +1 more source
Análisis de vulnerabilidad ambiental de la cuenca alta del río San Pedro, estado Miranda, Venezuela
, 2017 Environmental vulnerability by flooding and displacement of the communities located in the upper San Pedro River, Guaicaipuro, Miranda state, Venezuela was characterized using GIS.
H. Marin +2 more
semanticscholar +1 more source
American Journal of Human Biology, Volume 38, Issue 2, February 2026.ABSTRACT Objectives Altitude shapes human morphology as highland populations must cope with cold and hypoxic environments. Although Andean highlanders have been proposed to exhibit larger and deeper ribcages, this idea is mainly based on research using disarticulated skeletal elements or non‐South American controls. The objective of this research is to
J. M. López‐Rey +9 more
wiley +1 more source
Darwin's Geological Research in Argentina [PDF]
, 2009 On the occasion of the 200th. anniversary of Charles Darwin´s birth, the Asociación Geológica Argentina decided to prepare a special issue devoted to the geological research undertaken by Darwin in Argentina.
Aguirre-Urreta, Maria Beatriz +2 more
core
, 2012 Estudiamos los niveles y patrones de variabilidad genetica de ocho especies de peces nativos de la cuenca del rio San Pedro (cuenca del rio Valdivia, Region de los Rios, Chile), con el objetivo de evaluar diferencias microevolutivas en especies sometidas
P. Victoriano +8 more
semanticscholar +1 more source
Patrones de desplazamiento de peces nativos en el Río San Pedro (cuenca del Río Valdivia, Chile)
, 2012 Los peces nativos chilenos se caracterizan por ser de tamano pequeno (
Priscila Piedra +8 more
semanticscholar +1 more source
Earth Surface Processes and Landforms, Volume 51, Issue 2, February 2026.We provide a geomorphological analysis of Cordillera Vilcanota and use morphostratigraphic principles to reconstruct palaeo icefield extent and palaeoglacier readvances, likely during the Antarctic Cold Reversal and Younger Dryas. We find evidence of temperate and polythermal ice margins, with limited glaciofluvial landform generation.
Bethan Davies +11 more
wiley +1 more source