Search results for "Forming."

An Intelligent Tool to Predict Fracture in Sheet Metal Forming Operations

2007

One of the main issues in sheet metal forming operations design is the determination of formability limits in order to prevent necking and fracture. In fact, the ability to predict fracture represents a powerful tool to improve the production quality in mechanical industry. Many researchers investigated the problem here addressed, mainly studying forming limit diagrams (FLD) or developing fracture criteria which are able to foresee fracture defects for different processes. In this paper, the author present some early results of a research project focused on the application of artificial intelligence (AI) for ductile fracture prediction in sheet metal forming operations. The main advantage o…

Dielectric relaxation models applied of the dynamics of myoglobin as determined by Mössbauer spectroscopy

1996

Abstract Protein specific modes of motions are found in myoglobin crystals above 180 K. In this contribution we show that this type of motions can be analyzed by a Davidson-Cole, a Cole-Cole or a Havriliak-Negami distribution in analogy to dielectric relaxation. However, the temperature dependence of the obtained parameters is quite unusual indicating a broadening of the distributions with temperature instead of motional narrowing. This can be understood from the picture of conformational substates if one assumes that more and more substates become accessible with increasing temperature. The result shows that the analogy between glass forming organic liquids and proteins should not be exagg…

Primary culture of avian embryonic heart forming region cells to study the regulation of vertebrate early heart morphogenesis by vitamin A

2014

Background: Important knowledge about the role of vitamin A in vertebrate heart development has been obtained using the vitamin A-deficient avian in ovo model which enables the in vivo examination of very early stages of vertebrate heart morphogenesis. These studies have revealed the critical role of the vitamin A-active form, retinoic acid (RA) in the regulation of several developmental genes, including the important growth regulatory factor, transforming growth factor-beta2 (TGFβ2), involved in early events of heart morphogenesis. However, this in ovo model is not readily available for elucidating details of molecular mechanisms determining RA activity, thus limiting further examination o…

Animales, teorías feministas posmodernas y prácticas artísticas.

2019

Este artículo pretende mostrar cómo algunas teorías feministas posmodernas como el ecofeminismo y el posthumanismo, de autoras como Françoise d'Eaubonne, Alicia Puleo, Donna Haraway o Rosi Baridotti han contribuido a la crítica contra las prácticas androcéntricas basadas en el dominio sistémico de devastación y explotación del otro/a/os, perpetuando la jerarquía y autoridad del hombre.  Frente a ello estas autoras han propuesto un nuevo modelo de relación orgánica y de convivencia entre cultura y naturaleza, capaz de superar los modelos binarios, inspirado en el respeto a la diversidad de sexos y especies.Estos principios se hayan, así mismo, en las prácticas artísticas de algunas autoras c…

L'Esperienza del Teatro Massimo di Palermo

2010

Le Opere e i Giorni

2010

Fondazioni Liriche e Finanziamenti Pubblici

2008

European Lifelong Guidance Policy Network representatives’ conceptions of the role of information and communication technologies related to national …

2015

This article reports findings from a phenomenographic investigation into European Lifelong Guidance Policy Network representatives’ conceptions of the role of information and communication technologies (ICT) related to national lifelong guidance policies. The role of ICT in relation to national lifelong guidance policies was conceived as (1) unexploited, (2) emerging, (3) acknowledged but fragmented, and (4) strategic. The hierarchical structure of the findings may serve as a tool to enable policy makers and other stakeholders to deepen their understanding of critical aspects that may have an important role in relation to further developments and the successful implementation of existing an…

ARE LAC COOPERATIVE AND COMMERCIAL BANKS SO DIFFERENT IN THEIR MANAGEMENT OF NON‐PERFORMING LOANS?

2018

This paper assesses technical efficiency in the management of non‐performing loans (NPLs) in the Latin American and Caribbean (LAC) banking industry. To that end, Data Envelopment Analysis techniques are employed with data from the years 2013 to 2016 on a sample of 307 LAC cooperative and commercial banks. Our main contribution to existing literature is that differences of efficiency between cooperative banks and commercial banks are assessed as the result of the different capacities of their managers – managerial efficiency – and the so‐called programme efficiency, which represents differences in the technology used by these two categories of entities. Our principal result suggests that th…

Geographic diversification and credit risk in microfinance

2019

Abstract This paper examines the relation between geographic diversification and credit risk in microfinance. The empirical findings from the banking industry are mixed and inconclusive. This study extends the discussion into a new international setting: the global microfinance industry with lenders having both social and financial objectives. Using a large global sample of microfinance institutions (MFIs), we find that geographic diversification comes with more credit risks. However, this finding is more pronounced among non-shareholder MFIs like NGOs and cooperatives, compared to shareholder-owned MFIs. Moreover, the results show that MFIs can mitigate the effect of geographic diversifica…