Results 71 to 80 of about 1,169,048 (208)

Algunos enfoques de investigación en Etnomatemática [PDF]

open access: yes, 2014
La etnomatemática como campo de investigación ha tenido diferentes definiciones y tendencias metodológicas, cada una de estas muestra una concepción de las matemáticas y del conocimiento.
Fuentes, Christian Camilo
core   +2 more sources

La vegetación de Calakmul, Campeche, México: clasificación, descripción y distribución

open access: yes, 2017
The Calakmul region, at the center of the Yucatan peninsula, contains the largest forested area of the Mexican tropics. Our objective is to provide the classification, description and spatial distribution of the plant communities of Calakmul region.
Esteban Martínez, C. Leal
semanticscholar   +1 more source

Social Determinants of Sepsis Mortality in the United States: A Retrospective, Epidemiologic Analysis

open access: yesWorld Medical &Health Policy, Volume 17, Issue 4, Page 823-830, December 2025.
ABSTRACT Sepsis is a leading cause of mortality in the United States, with over 350,000 deaths annually, yet the contribution of neighborhood‐level social determinants of health (SDoH) remains underexplored. We conducted a retrospective analysis of 4.4 million hospitalized patients with sepsis, identified using ICD‐10 codes, leveraging de‐identified ...
Ahad Khaleghi Ardabili   +3 more
wiley   +1 more source

Análisis de la fuerza isométrica en la propulsión y tracción en slalom en silla de ruedas y su relación con el rendimiento y la clasificación funcional. [Isometric force in wheelchair slalom during traction and propulsion and their relationship with performance and functional classification]. [PDF]

open access: yesRevista Internacional de Ciencias del Deporte, 2013
El sistema de clasificación del slalom en silla de ruedas contempla como elegibles a deportistas con parálisis cerebral y daño cerebral adquirido. La tendencia actual en los sistemas de clasificación es realizar una clasificación integrada y funcional ...
Raúl Reina   +3 more
doaj   +1 more source

An evaluation of geographic and annual variation in morphometric characters and gill-raker counts of yellowfin tuna, Thunnus albacares, from the Pacific Ocean [PDF]

open access: yes, 1992
ENGLISH: Samples of yellowfin tuna, Thunnus albacares, collected from five areas of the Pacific Ocean (Mexico, Ecuador, Australia, Japan, and Hawaii) between January and May of 1988 and 1990 were examined for spatiotemporal variation in morphometric ...
Schaefer, Kurt M.
core  

Estudio Comparativo de Técnicas de Clasificación de Imágenes Hiperespectrales

open access: yesRevista Iberoamericana de Automática e Informática Industrial RIAI, 2019
Las imágenes hiperespectrales constituyen el núcleo de varios programas de observación remota de la Tierra. La cantidad de información que contienen estas imágenes, formadas por cientos de canales espectrales estrechos y casi continuos, resulta de gran ...
Mercedes Eugenia Paoletti   +3 more
semanticscholar   +1 more source

Applying the IUCN Global Ecosystem Typology to classify, describe, and map ecosystems based on regional data and Indigenous knowledge

open access: yesConservation Biology, Volume 39, Issue 6, December 2025.
Four streams of infromation, data, and knowledges are brought together into an ecosystem typology for the Tiwi Islands. The Typology contains written descriptions and conceptual models for each ecosystem, cross‐reference to other classification schemes, and a map of ecosystem distributions. Abstract Effective ecosystem conservation for biodiversity and
Alys R. Young   +13 more
wiley   +1 more source

Riqueza de especies, clasificación y listado de las gramíneas (Poaceae) de México

open access: yes, 2018
Background and Aims: In 2006 the catalogue of the grasses of Mexico was published, but since then, the classification as well as new species to science changed the numbers of the family in Mexico and worldwide.
J. S. Ken
semanticscholar   +1 more source

Robots Hiper-Redundantes: Clasificación, Estado del Arte y Problemática

open access: yesRevista Iberoamericana de Automática e Informática Industrial RIAI, 2018
Los robots hiper-redundantes son aquellos que tienen un número muy elevado de grados de libertad. En su uso cotidiano, la redundancia es referida para indicar una repetición o un uso excesivo de un concepto.
Andrés Martín Barrio   +3 more
semanticscholar   +1 more source

Three Challenges in Political Regime Classification: The Regime Configuration Framework

open access: yesPolitics &Policy, Volume 53, Issue 6, December 2025.
ABSTRACT This article reviews political regime classification in the context of contemporary debates. We problematize the classical division between categorical and continuous approaches and recent responses to their limitations. We use hybrid regimes to question the conventional framing of political regime classification.
Zarina Kulaeva
wiley   +1 more source

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