Search results for "Forming."
showing 10 items of 1704 documents
Anxiety and self-esteem as mediators of the relation between family communication and indecisiveness in adolescence
2013
Abstract In this study, we explored the unique and common contributions of anxiety, self-esteem, and family communication on indecisiveness among adolescents. Three hundred and fifty pupils from 13 to 16 years of age completed selfreport measures on indecisiveness, quality of family communication, trait anxiety, and self-esteem. The findings in this study showed that students’ indecisiveness is predicted by family communication mediated by anxiety and self-esteem. These results have important implications for practice as it stresses the importance of anxiety and self-esteem. Nevertheless, the counselors could also focus on enhancing relationship-building skills by introducing the adolescent…
Mamá, quiero ser artista. La situación actual de la mujer en el panorama artístico
2011
La lucha reivindicativa de la mujer por hacerse un hueco en el panorama artístico se acentúa en los años setenta con grandes artistas que defienden sus derechos en Estados Unidos y Europa a través de nuevos medios como la fotografía o la performance. Éstas van abriendo hueco a sus generaciones posteriores. La herencia que ellas han dejado permite a la mujer trabajar sin plantearse cuestiones de género como sí se hacía en el pasado, aunque este hecho no significa que esté todo solucionado y que haya que bajar la guardia. La artista Natalia Lozano, artista emergente multidisciplinar, sirve como ejemplo para conocer qué situación se encuentra una mujer joven hoy en día y permite sacar una lect…
Anaerobic digestion of grass silage in batch leach bed processes for methane production.
2007
Abstract Anaerobic digestion of grass silage in batch leach bed reactors, with and without a second stage upflow anaerobic sludge blanket (UASB) reactor, was evaluated. Sixty six percent of the methane potential in grass was obtained within the 55 days solids retention time in the leach bed–UASB process without pH adjustment, whereas in the one-stage leach bed process 20% of the methane potential in grass was extracted. In two-stage operation, adjustment of the pH of influent to the leach bed reactor to 6 with HCl led to inhibition of both hydrolysis/acidogenesis and methanogenesis. In the leach bed–UASB process 39% of the carbohydrates and 58% of the acid soluble lignin were solubilised wi…
Music, Architecture, Proportion and the Renaissance Way of Thinking
2020
During the Renaissance, the language of proportion became a unified theory capable of encompassing the understanding of the world within a coherent theological, philosophical and artistic framework. Music, with its harmonic paradigm, plays a key role in this construction. From the fifteenth century through to the end of the sixteenth century, architects and architectural theorists made reference, both in new treatises and commentaries to Vitruvius, to musical matters, transforming architecture into the summa of knowledge. The affinity to music was grounded on both a common mathematical and rhetoric gnosiology. Formerly conceived of as ideal, numbers became eloquent, reinforcing the quantita…
La empresa 60 de las Empresas Morales de Juan de Borja. Posible origen textual de la imagen del caracol
2014
ABSTRACT: The author of this essay argues that the source of the image of the snail from Juan de Borja’s 60th impresa of his Empresas Morales is textual, and that it can be traced back to the Picta Poesis by Aneau Barthelemy. KEYWORDS: Source, Snail, Impresa, Empresas Morales , Juan de Borja, Picta Poesis , Aneau Barthelemy. RESUMEN: El autor defiende, en el presente articulo, que el origen de la imagen del caracol que aparece en la empresa numero 60 de las Empresas Morales de Juan de Borja posee un origen escrito y que puede rastrearse hasta la Picta Poesis de Aneau Barthelemy. PALABRAS CLAVES: Origen, Caracol, Empresa, Empresas Morales , Juan de Borja, Picta Poesis, Aneau Barthelemy.
Influence of mechanical properties of the sheet material on formability in single point incremental forming
2004
Abstract New trends in sheet metal forming are rapidly developing and several new forming processes have been proposed to accomplish the goals of flexibility and cost reduction. Among them single point incremental forming operations, in which the final shape of the component is obtained by the relative movement of a simple and small punch with respect to the blank, appear quite promising. In the paper, material formability issues in incremental forming were studied. Some relevant correlations among material formability and other mechanical properties of the material were analysed. The FLD 0 value, i.e. the major strain at fracture in plane strain conditions, was determined for different mat…
Analysis of Some Innovative and Flexible Sheet Forming Processes
2002
In the field of sheet forming, innovative and flexible processes that do not impose the use of expensive conventional equipments and/or do not require time consuming set-up operations have become, nowadays, a rather promising research topic. Two different main lines are currently followed: the former is based on the development of new stamping processes based on the utilization of flexible media, while the latter is aimed to develop so called progressive forming processes (spinning and incremental forming). Both hydro-forming and incremental forming permit a very relevant reduction of the tooling and set-up costs and improve process flexibility. These items are discussed in detail in the pa…
Process mechanics analysis in single point incremental forming
2004
The request of highly differentiated products and the need of process flexibility have brought the researchers to focus the attention on innovative sheet forming processes. Industrial application of conventional processes is, in fact, economically convenient just for large scale productions; furthermore conventional processes do not allow to fully satisfy the mentioned demand of flexibility. In this contest, single point incremental forming (SPIF) is an innovative and flexible answer to market requests. The process is characterized by a peculiar process mechanics, being the sheet plastically deformed only through a localised stretching mechanism. Some recent experimental studies have shown …
An integrated approach to the design of tube hydroforming processes: artificial intelligence, numerical analysis and experimental investigation
2004
In the last years, the growing role of process flexibility in modern mechanical industries has driven a rising interest in optimisation of process/product design through innovative techniques. Moreover, the development of niche productions, which are characterised by low production volumes and small batches leads to the need of more flexible and rapid forming technologies. In this way, a great research effort is performed towards the study of new stamping processes: among them hydro forming finds a large interest in automotive industry since it allows to significantly reduce tooling costs and also to avoid some secondary operations. Different studies are available in the technical literatur…
Incremental forming of friction stir welded taylored sheets
2006
In the last decade sheet metal forming market has undergone substantial mutations since the development of more efficient strategies in terms of flexibility and cost reduction is strictly due. Such requirements are not consistent with traditional metal stamping processes which are characterized by complex equipment, capital and tooling costs; thus the industrial application of such processes is economically convenient just for large scale productions. For this reason most of the research work developed in the last years has been focused on the development of new sheet forming processes able to achieve the above discussed goals. Contemporary, with particular reference to the automotive indus…