Results 31 to 40 of about 573 (166)
Optimum Design of a Nonlinear Vibration Absorber Coupled to a Resonant Oscillator: A Case Study
Shock and Vibration, Volume 2018, Issue 1, 2018., 2018 This paper presents the optimal design of a passive autoparametric cantilever beam vibration absorber for a linear mass‐spring‐damper system subject to harmonic external force. The design of the autoparametric vibration absorber is obtained by using an approximation of the nonlinear frequency response function, computed via the multiple scales method ...
H. F. Abundis-Fong +4 more
wiley +1 more source
Biotechnological Strategies to Improve Plant Biomass Quality for Bioethanol Production
BioMed Research International, Volume 2017, Issue 1, 2017., 2017 The transition from an economy dependent on nonrenewable energy sources to one with higher diversity of renewables will not be a simple process. It requires an important research effort to adapt to the dynamics of the changing energy market, sort costly processes, and avoid overlapping with social interest markets such as food and livestock production.
Julián Mario Peña-Castro +5 more
wiley +1 more source
Effect of Crushed Glass Cullet Sizes on Physical and Mechanical Properties of Red Clay Bricks
Advances in Materials Science and Engineering, Volume 2016, Issue 1, 2016., 2016 This study reports the effect of clear waste glass from bottles added on 20 to 30 wt.% and variable particle size (<500, <300, and <212 μm), into clay mixtures for the handmade brick manufacturing process. The bricks were manufactured with mixtures of clay, crushed glass, and water in different proportions, homogenized, casted in wooden molds, air ...
Patricia Ponce Peña +8 more
wiley +1 more source
Densidad de siembra y crecimiento de maíces forrajeros.
Agronomía Mesoamericana, 2011 El objetivo de este trabajo fue identifi car genotipos de maíz con potencial forrajero. Un primer trabajo (E1) se hizo de noviembre del 2007 a febrero del 2008, se evaluaron los genotipos H-520, HE-1A17, HE-2A15, V-556AC, VS-536, A7573 y un genotipo ...
Miguel Ángel Sánchez-Hernández +5 more
doaj +1 more source
Journal of Systematics and Evolution, Volume 63, Issue 6, Page 1501-1518, November 2025.Investigating the systematics and biogeography of Neotropical catfishes of the genus Rhamdia refined phylogenetic hypotheses, including deep paraphyly of Rhamdia laticauda, supported northward dispersal catalyzed by emergence of the Panamanian Isthmus and imply that cave colonization is widespread, convergent, and recent, with established cave‐dwelling
Jairo Arroyave +6 more
wiley +1 more source
Producción de tomate de cáscara (Physalis ixocarpa Brot.) con lombricomposta y fertilización química
Ecosistemas y Recursos AgropecuariosEl uso de fertilizantes convencionales ha sido una alternativa de producción viable por muchos años, sin embargo, ha causado graves afectaciones en los ecosistemas.
José Eduardo Rivadeneyra-Manzanilla +4 more
doaj +1 more source
Challenging Agroecology—Promise and Pitfalls for Agrarian Studies
Journal of Agrarian Change, Volume 25, Issue 3, July 2025.ABSTRACT Within agrarian studies, promoting agroecology is widely held as a key objective to animate progressive change with social and environmental benefits across rural regions. Yet, in practice, many questions remain salient concerning the political economy and social dynamics of agroecological transitions.
Ben M. McKay +4 more
wiley +1 more source
EL PATRON DE ASENTAMIENTO Y LA OBSIDIANA EN EL BAJO PAPALOAPAN-VERACRUZ CENTRAL, MÉXICO
Clio Arqueológica, 2010 El proyecto arqueológico Padrón de Asentamiento y Poblamiento Prehispánico el la Cuenca Baja del Papaloapan, Ver. (PAYPPCUBAPA) nace en el año de 1998, en respuestas a una necesidad imperiosa de conocer la historia prehispánica de esta región.
Pedro Jiménez Lara +1 more
doaj
¿Qué investigan sobre emprendurismo las Instituciones de Educación Superior Pública en Oaxaca?
IE Revista de Investigación Educativa de la REDIECH, 2014 Este trabajo forma parte de una investigación titulada “Estado del arte de la investigación sobre educación, derecho, género y emprendurismo, efectuada en las instituciones de educación superior pública y otras instituciones de la sociedad del ...
Javier Damián Simón +3 more
doaj +1 more source
International Journal of Agronomy, Volume 2025, Issue 1, 2025.This study was carried out to evaluate the yield and quality of pineapple fruits of the cultivars MD2, Smooth Cayenne, and Cabezona from plants treated with 2‐(3‐chlorophenoxy) propionic acid (CPA) in the humid tropics of Mexico with respect to three planting dates and two planting densities.
Juventino Pérez-Romero +6 more
wiley +1 more source