Search results for "Forming."
showing 10 items of 1704 documents
Excessive Focus on Risk? Non-performing Loans and Efficiency of Microfinance Institutions
2021
Discrimination by microcredit officers: Theory and evidence on disability in Uganda
2015
This paper studies the relationship between a microfinance institution (MFI) and its loan officers when officers discriminate against a particular group of micro-entrepreneurs. Using survey data from Uganda, we provide evidence that loan officers are more biased than other employees against disabled micro-entrepreneurs. In line with the evidence, we build an agency model of a non-profit MFI and a biased loan officer in charge of granting loans. Since incentive schemes are costly and the MFI's budget is limited, the MFI faces a trade-off between combating discrimination and granting loans. We show that the optimal incentive premium is a non-decreasing function of the MFI's budget. Moreover, …
Diseño gráfico para formar al profesorado de primaria
2021
Educar en diseño es probablemente la base para una predisposición social hacia la creatividad y la innovación. Presentamos los resultados de una investigación desarrollada en la práctica universitaria, formulada metodológicamente como estudio de caso. Incorporamos la práctica del diseño gráfico al currículum formativo de Maestro/a en Educación Primaria. Si queremos que la ciudadanía aprecie el diseño, conviene preparar al profesorado. Para lograr este acercamiento al diseño gráfico planteamos un taller en el que cada participante elabora su propio exlibris. Los resultados positivos nos animan a continuar con este tipo de iniciativas que aglutinan diseño, patrimonio, identidad e inclusión. E…
Monstrous Hybrids in Shakespeare’s King Lear
2017
ABSTRACT: This article seeks to present the different languages (emblems, Renaissance translations of classical myths, biblical exegesis) that inform the images of monsters which, as hybrid creatures blending human and animal characteristics, serve a dramatic function in Shakespeare’s King Lear . It means to question the ways in which the play links filial ingratitude with female monstrosity and Lear’s madness. Tracing the classical and medieval lineage of the monstrous bestiary (serpent, tiger, vulture) in King Lear and connecting it to emblematic readings of Shakespeare’s time, it explores how Shakespeare provides a dynamic characterisation of Goneril and Regan through their bestialisatio…
TGF-beta as a T cell regulator in colitis and colon cancer
2005
TGF-beta is a pleiotropic cytokine with powerful immunosuppressive functions. Mice deficient for TGF-beta1 show a dramatic phenotype with severe multiorgan inflammation and die shortly after birth. Recent investigations have highlighted the role of TGF-beta in suppression of T cell mediated autoimmune inflammation and anti-tumor immunity. In addition to its direct anti-inflammatory effects on T cells, TGF-beta has been implicated as central regulator of regulatory T cells. TGF-beta not only mediates the suppression of effector T cells by Tregs, recent evidence also reveals a role for TGF-beta along with TCR stimulation in the peripheral induction of regulatory T cells from naïve CD4+CD25- c…
Lactate adversely affects the in vitro formation of endothelial cell tubular structures through the action of TGF-beta1.
2006
When lactate accumulation in a tumor microenvironment reaches an average concentration of 10-20 mM, it tends to reflect a high degree of malignancy. However, the hypothesis that tumor-derived lactate has a number of partially adverse biological effects on malignant and tumor-associated host cells requires further evidence. The present study attempted to evaluate the impact of lactate on the process of angiogenesis, in particular on the formation of tubular structures. The endothelial cell (EC) network in desmoplastic breast tumors is primarily located in areas of reactive fibroblastic stroma. We employed a fibroblast-endothelial cell co-culture model as in vitro angiogenesis system normally…
Energy Efficiency of Sheet Metal Working Processes: Where do we stand today?/Energieeffizienz in Prozessen der Blechumformung – eine aktuelle Standor…
2014
Due to increasing energy and resource costs at the one hand and upcoming regulations on energy and resource efficiency at the other, a growing interest of machine tool builders to the environmental performance of their machine tools can be observed today. The last decade, academic as well as industrial research groups started to assess the energy demand of discrete part manufacturing processes and indicated a significant potential for improvement [1]. In contrast to conventional machining processes (e.g. milling, turning…), (sheet) metal forming processes are still less well documented in terms of their energy demand [2]. In consequence, potential energy efficiency improvement measures for …
ROUGHNESS CONTROL OF PARTS OBTAINED THROUGH INCREMENTAL SHEET FORMING
2007
Abstract The present paper adresses the issue of controlling the quality of surface in the case of a new sheet metal forming process by which various curved shells are formed without the help of expensive dies. The roughness of the surface which comes in direct contact with the punch at incremental sheet forming suffers an obvious worsening compared to the initial blank surface roughness. The present paper discusses the measuring of the roughness of parts obtained through the previously mentioned process and highlights the factors that influence it. There were taken into account the initial roughness of the punch, the punch diameter and the friction coefficient between the punch and the bla…
Contributions Regarding Incremental Forming Process of Bimetallic Sheets
2014
Incremental forming is a process with a high degree of novelty, so this paper describes first of all a series of theoretical principles of the incremental forming process. A main objective of the paper was the usage, as blanks in incremental forming process of bimetallic sheets. So the experimental researches have targeted the realising of parts with different shapes made from such type of blank. In the experimental researches was chosen as technological equipment for incremental forming the numerical controlled milling centre. The paper also present the tools used in incremental forming in order to obtain a hemispherical parts.
Robot-Forming - An Incremental Forming Process Using an Industrial Robot by Means of DELMIA Software Package
2013
The purpose of this research is to present an alternative method for manufacturing sheet metal parts using an asymmetric incremental forming process by means of an industrial robot. This method is based on designing, simulating and generating the toolpath for the tool attached to the robot using DELMIA software package. The proposed approach allows users to check for system collisions, robot joins limitations and singularity problems. After a comprehensive simulation of the movements of the robot is performed, the program code can be generated by means of a specific DELMIA function. The program can be used afterwards to control the robot during the experimental work. In order to demonstrate…