http://hdl.handle.net/10498/19474 Thu, 05 Nov 2026 10:29:35 GMT 2026-11-05T10:29:35Z http://hdl.handle.net/10498/38468 Image based Analysis Evaluation of the Elements of Secondary Adhesion Wear in Dry Turning of Aluminum Alloys Batista Ponce, Moisés; Salguero Gómez, Jorge; Gómez Parra, Álvaro; Álvarez Alcón, Miguel; Marcos Bárcena, Mariano Minimizing downtime in machine tools is one of the factors that determine the performance increase of the production processes involved. This increase can be considered from different points of view: economic, energetic and environmental. Machining processes can be stopped by needing to change the tool as a consequence of the loss of their initial properties due to the wear process that suffer during machining. One of the wear processes which takes place in a wider range of temperatures in the machining of metal alloys is the adhesion wear, and specially in the case of light alloys, secondary adhesion wear, which can be placed in the tool rake face as a layer (Built-Up Layer, BUL) and in the tool edge (Built-Up Edge, BUE). This paper analyzes the influence of cutting parameters on the secondary adhesion wear effects in the dry turning of UNS A92024 (Al-Cu) alloy. Sun, 01 Jan 2012 00:00:00 GMT http://hdl.handle.net/10498/38468 2012-01-01T00:00:00Z http://hdl.handle.net/10498/37271 Carencias y dificultades en el ámbito algebraico y espacial geométrico en alumnos de nuevo ingreso Braza Blanco, María Verónica; Alegre Salguero, María de la Paz; Costado Dios, María Teresa El mundo globalizado y en constante cambio en que el vivimos, hace que cada individuo tenga que enfrentarse a situaciones complejas que puedan malograr su inserción en esta sociedad desafiante. Ante esta perspectiva nada halagüeña, la educación junto con la formación debe hacer eco a esta realidad, y por ello: i) formar un tándem y ii) dar respuesta a los retos y desafíos que se plantean bajo esta perspectiva, con la finalidad de preparar a los individuos para afrontar y superar tales escenarios de forma satisfactoria. Mon, 01 Jan 2024 00:00:00 GMT http://hdl.handle.net/10498/37271 2024-01-01T00:00:00Z http://hdl.handle.net/10498/37270 Ansiedad matemática de maestros en formación: un estudio de caso de alumnado de cuarto curso del Grado Costado Dios, María Teresa; Alegre Salguero, María de la Paz El dominio afectivo juega un papel fundamental en el proceso de enseñanza y aprendizaje. Este ha empezado a cobrar importancia en la medida en que los educadores han apreciado la influencia que tiene sobre el aprendizaje escolar (Hernández, 1996). Autores como McLeod (1998) defienden la existencia de tres descriptores y define el dominio afectivo como un extenso rango de estados de ánimo que son generalmente considerados como algo diferente de la pura cognición, e incluye como componentes específicos el conjunto del sistema de creencias, las actitudes y las emociones. Mon, 01 Jan 2024 00:00:00 GMT http://hdl.handle.net/10498/37270 2024-01-01T00:00:00Z http://hdl.handle.net/10498/17508 Physical characterization of super-fragile materials in underwater archaeological sites. Zambrano, Luis Carlos; Bethencourt Núñez, Manuel; Gil Montero, María Luisa Almoraima The super-fragile materials existing in underwater archaeological sites are an invaluable source of historical information that can rarely be documented because of their poor condition. The natural fiber ropes used in rigging historic vessels are a key to understanding the evolution of nautical architecture in antiquity. A new method of molding adapted to superfragile materials is being developed with trials on hemp ropes artificially aged with sulfuric acid 0.5 M. Aging provides similar consistency of the original materials as under archaeological conditions. For the physical characterization of the objects, experimental equipment has been developed which is based on pressure resistance and maximum moisture content. The characterization model allows classification of organic remains found in underwater sites in three degrees of consistency by simple instrumentation. Sat, 01 Nov 2014 00:00:00 GMT http://hdl.handle.net/10498/17508 2014-11-01T00:00:00Z