Recent Developments in the Manufacture of Complex Components by Influencing the Material Flow during Extrusion

2008 ◽  
Vol 367 ◽  
pp. 55-62 ◽  
Author(s):  
Nooman Ben Khalifa ◽  
Dirk Becker ◽  
Marco Schikorra ◽  
A. Erman Tekkaya
Keyword(s):  
Material Flow ◽  
Extrusion Process ◽  
The Other ◽  
Manufacturing Processes ◽  
Fluid Machinery ◽  
Forming Process ◽  
Recent Developments ◽  
Influencing Parameters ◽  
The One ◽  
Screw Rotors

New innovative direct extrusion process variants, curved profile extrusion (CPE), twisted profile extrusion (TPE), and hollow profile extrusion (HPE), which increase the flexibility of aluminum profile manufacturing processes, are presented in this paper. These processes are characterized by influencing the material flow inside the die so that the forming process is completed when exiting the die. On the one hand, three-dimensionally curved profiles are produced and analyzed by CPE regarding the accuracy, the influencing parameters, and the compensation strategies. On the other hand, TPE and HPE make it possible to manufacture helical profiles usable, for example, as screw rotors in fluid machinery.

scholarly journals Theology at Thresholds: Learning from a Practice ‘In Transition’

2017 ◽  
Vol 4 (1) ◽  
pp. 45-62 ◽  
Author(s):  
Rachel Muers ◽  
Rhiannon Grant
Keyword(s):  
Decision Making ◽  
The Other ◽  
Small Scale ◽  
Theological Ethics ◽  
Reciprocal Influence ◽  
Core Practices ◽  
Recent Developments ◽  
Collective Process ◽  
The One ◽  
Over Time

Recent developments in contemporary theology and theological ethics have directed academic attention to the interrelationships of theological claims, on the one hand, and core community-forming practices, on the other. This article considers the value for theology of attending to practice at the boundaries, the margins, or, as we prefer to express it, the threshold of a community’s institutional or liturgical life. We argue that marginal or threshold practices can offer insights into processes of theological change – and into the mediation between, and reciprocal influence of, ‘church’ and ‘world’. Our discussion focuses on an example from contemporary British Quakerism. ‘Threshing meetings’ are occasions at which an issue can be ‘threshed out’ as part of a collective process of decision-making. Drawing on a 2015 small-scale study (using a survey and focus group) of British Quaker attitudes to and experiences of threshing meetings, set in the wider context of Quaker tradition, we interpret these meetings as a space for working through – in context and over time – tensions within Quaker theology, practice and self-understandings, particularly those that emerge within, and in relation to, core practices of Quaker decision-making.

scholarly journals Recent Developments in the Design of Non-Biofouling Coatings for Nanoparticles and Surfaces

2020 ◽  
Vol 21 (3) ◽  
pp. 1007 ◽  
Author(s):  
Carlos Sanchez-Cano ◽  
Mónica Carril
Keyword(s):  
Gold Standard ◽  
Protein Corona ◽  
The Other ◽  
Engineered Surfaces ◽  
Recent Developments ◽  
Protein Adhesion ◽  
And Performance ◽  
The One ◽  
Biological Context

Biofouling is a major issue in the field of nanomedicine and consists of the spontaneous and unwanted adsorption of biomolecules on engineered surfaces. In a biological context and referring to nanoparticles (NPs) acting as nanomedicines, the adsorption of biomolecules found in blood (mostly proteins) is known as protein corona. On the one hand, the protein corona, as it covers the NPs’ surface, can be considered the biological identity of engineered NPs, because the corona is what cells will “see” instead of the underlying NPs. As such, the protein corona will influence the fate, integrity, and performance of NPs in vivo. On the other hand, the physicochemical properties of the engineered NPs, such as their size, shape, charge, or hydrophobicity, will influence the identity of the proteins attracted to their surface. In this context, the design of coatings for NPs and surfaces that avoid biofouling is an active field of research. The gold standard in the field is the use of polyethylene glycol (PEG) molecules, although zwitterions have also proved to be efficient in preventing protein adhesion and fluorinated molecules are emerging as coatings with interesting properties. Hence, in this review, we will focus on recent examples of anti-biofouling coatings in three main areas, that is, PEGylated, zwitterionic, and fluorinated coatings.

Biography and (Global) Microhistory

2017 ◽  
Vol 11 (3) ◽  
Author(s):  
Mark Gamsa
Keyword(s):  
Life History ◽  
Northeast China ◽  
The Other ◽  
Historical Writing ◽  
Forthcoming Book ◽  
Recent Developments ◽  
History Of ◽  
German Origin ◽  
The One ◽  
The City

AbstractThis article has two goals. It reflects on the recent developments and agenda of an approach to historical writing that is now becoming known by the name global microhistory, and it analyses the attention which this approach pays to individual lives. It also explores some of the challenges in writing the biography of a city alongside the life history of a person. The city is Harbin, a former Russian-managed railway hub in Manchuria, today a province capital in Northeast China. The person is Baron Roger Budberg (1867–1926), a physician of Baltic German origin who arrived in Harbin during the Russo-Japanese war and remained there until his death, leaving published works and unpublished correspondence in German and Russian. My forthcoming book about Budberg and Harbin challenges the distinction between writing “biography”, on the one hand, and “history”, on the other, while navigating between the “micro” and “macro” layers of historical enquiry.

QUANTUM COSMOLOGY: SUSY'S STAGE

2013 ◽  
Vol 22 (04) ◽  
pp. 1330006 ◽  
Author(s):  
PAULO VARGAS MONIZ
Keyword(s):  
Early Universe ◽  
Quantum Cosmology ◽  
Quantum Effects ◽  
The Other ◽  
Parallel Session ◽  
Other Hand ◽  
Recent Developments ◽  
The One

This report comprises two parts. On the one hand, I will, based on the talks at the CM4 parallel session "Quantum Cosmology and Quantum Effects in the Early Universe" which I chaired, point to interesting recent developments in quantum cosmology. On the other hand, some of the basics of supersymmetric quantum cosmology are briefly reviewed, pointing to promising lines of research to explore. I will start with the latter, finishing the report with the former.

Newest Developments on the Manufacture of Helical Profiles by Hot Extrusion

2011 ◽  
Vol 133 (6) ◽  
Author(s):  
Nooman Ben Khalifa ◽  
A. Erman Tekkaya
Keyword(s):  
Material Flow ◽  
Twist Angle ◽  
Hot Extrusion ◽  
Extrusion Process ◽  
Die Design ◽  
3D Fem ◽  
Extrusion Dies ◽  
Application Fields ◽  
Twisting Angle ◽  
Screw Rotors

A new innovative direct extrusion process, helical profile extrusion (HPE) is presented, which increases the flexibility of aluminum profile manufacturing processes. The application fields of such profiles can be seen in screw rotors for compressors and pumps. The investigations concentrate on experimental and numerical analyses by 3D-FEM simulations to analyze the influence of friction and the material flow on the twisting angle and contour accuracy. By means of finite-element method (FEM), the profile shape could be improved by modifying the die design. The numerical results were validated by experiments. For these investigations, a common aluminum alloy AA6060 was used. Mainly, the friction in the die influences the twist angle and the shape of the helical profile. Two die coatings were analyzed, but the friction was not substantially decreased in any of these cases. Although there is no efficient practical solution for reducing the friction in extrusion dies using tested die coatings, the required profile contour could be achieved by new die designing and by modifying the material flow. However, increasing the twist angle is limited due to geometrical aspects of this technology, namely, by the ratio of the volume to the contact area with the die for the displaced metal.

scholarly journals Companies’ human rights compliance: the EU integrated approach to support the duty to assess and address human rights related risks of business activities

2019 ◽  
Vol 3 (2) ◽  
pp. 57-71
Author(s):  
Marta Gatti
Keyword(s):  
Human Rights ◽  
Corporate Social Responsibility ◽  
National Level ◽  
Integrated Approach ◽  
The Other ◽  
Recent Developments ◽  
The One ◽  
Corporate Social ◽  
Eu Support ◽  
The Eu

The purpose of this article is, on the one hand, to describe EU support of the adoption of a corporate social responsibility policy by EU undertakings, both within and outside the EU borders. On the other hand, this article will focus on the most recent developments in the field of human rights reporting at national level and, in particular, on the French commitment to implement mechanisms to prevent infringements on human rights across the supply chain.

The End and Rebirth of Nature?

2016 ◽  
Vol 24 (47) ◽  
pp. 109-124
Author(s):  
Massimiliano Simons ◽  
Keyword(s):  
Synthetic Biology ◽  
Environmental Philosophy ◽  
The Other ◽  
Other Hand ◽  
Recent Developments ◽  
The One

In this article, two different claims about nature are discussed. On the one hand, environmental philosophy has forced us to reflect on our position within nature. We are not the masters of nature as was claimed before. On the other hand there are the recent developments within synthetic biology. It claims that, now at last, we can be the masters of nature we have never been before. The question is then raised how these two claims must be related to one another. Rather than stating that they are completely irreconcilable, I will argue for a dialogue aimed to discuss the differences and similarities. The claim is that we should not see it as two successive temporal phases of our relation to nature, but two tendencies that can coexist.

The Significance of Emphasis in Latina Case Study from Caesar's Bellum Gallicum

1992 ◽  
Vol 39 (1) ◽  
pp. 66-77 ◽  
Author(s):  
Mollie ◽  
John Dixon
Keyword(s):  
Word Order ◽  
Narrative Discourse ◽  
The Other ◽  
Recent Developments ◽  
Bellum Gallicum ◽  
General Linguistics ◽  
The One

As a contribution to the study of ‘Latin in use’, we focus in this article on the ways a writer indicates what s/he wants to emphasize within the sentence; the specific linguistic signs s/he uses to that end; and the range of effects that these may have for an alert reader. We have used, on the one hand, recent developments in the study of narrative, discourse and general linguistics and, on the other, the work of earlier pioneers in the field of word order in Latin.

The General Nature of a Moral Duty

Philosophy ◽  
1953 ◽  
Vol 28 (104) ◽  
pp. 41-57
Author(s):  
W. J. Rees
Keyword(s):  
The Other ◽  
Theory Of Knowledge ◽  
Moral Duty ◽  
General Nature ◽  
Moral Principles ◽  
Recent Developments ◽  
Moral Duties ◽  
The One

I propose in this article to reconsider, in the light of some recent developments in the theory of knowledge, certain general questions about the nature of duty. In particular, I propose to consider the question of the relation between our moral duties on the one hand, and our knowledge or ignorance of facts and of moral principles on the other.

Rethinking the Very Idea of Egalitarian Markets and Corporations: Why Relationships Might Matter More than Distribution

2015 ◽  
Vol 25 (1) ◽  
pp. 93-124 ◽  
Author(s):  
Pierre-Yves Néron
Keyword(s):  
Political Philosophy ◽  
Business Ethics ◽  
John Rawls ◽  
The Other ◽  
Social Cooperation ◽  
Business Organizations ◽  
Theories Of Justice ◽  
Recent Developments ◽  
Relational Theories ◽  
The One

ABSTRACT:What kinds of markets, market regulations, and business organizations are compatible with contemporary egalitarian theories of justice? This article argues that any thoughtful answer to this question will have to draw on recent developments in political philosophy that are concerned not only with the equality of the distribution of core goods (or as John Rawls famously put it, with the “distribution of the benefits and burdens of social cooperation”) but also with the requirements for equality of status, voice, and so on, in the relations between individuals and within organizations. The dominance of theories of distributive justice in egalitarian political philosophy since Rawls may have contributed, on the one hand, to the oft-recognized gulf between these theories and their theorists and, on the other, to discussions of corporate governance and business ethics. The main purpose of this article is to introduce business ethicists to some of the less-familiar features of recent relational theories of justice and equality, and to suggest that some of these notions may help bridge the gap between business ethics and political philosophy more generally.

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