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Article
Publication date: 1 March 1941

H. Castaing

EACH blade of an airscrew is submitted to an elementary static balance check after it has been completed. But this operation does not eliminate the necessity to carry out…

Abstract

EACH blade of an airscrew is submitted to an elementary static balance check after it has been completed. But this operation does not eliminate the necessity to carry out a general balance of the complete airscrew. This is carried out statically, first of all for the hub alone, and then statically and dynamically for the completely assembled airscrew.

Details

Aircraft Engineering and Aerospace Technology, vol. 13 no. 3
Type: Research Article
ISSN: 0002-2667

Article
Publication date: 1 May 1939

H. Castaing

IN the construction of their airscrews the Hispano Suiza Company use principally aluminium alloys—duralumin, alfcrium, avional—with a mean density of 2·8, and with…

Abstract

IN the construction of their airscrews the Hispano Suiza Company use principally aluminium alloys—duralumin, alfcrium, avional—with a mean density of 2·8, and with mechanical properties equal to those of a half‐hard steel. They have been considering for some time the manufacture of blades of magnesium alloy, the mean density of which is 1·8, thereby offering considerable advantage over the aluminium alloys as regards weight, but, in this article, only aluminium alloy blades are dealt with.

Details

Aircraft Engineering and Aerospace Technology, vol. 11 no. 5
Type: Research Article
ISSN: 0002-2667

Article
Publication date: 1 December 1941

Murray C. Beebe

The necessity for refinement of airscrew balance in order to eliminate destructive vibration from this source is due largely to the continuously improving standards of…

Abstract

The necessity for refinement of airscrew balance in order to eliminate destructive vibration from this source is due largely to the continuously improving standards of passenger comfort of modern aeroplanes and to the operator's desire to extend the normal service life of the power plant and its accessories as well as that of the aeroplane structure. Power plant vibration already has been reduced to a degree where, in standard aeroplanes, there is no longer danger of major structural failure due to vibration originating from this source. Efforts to refine further the balance of engines and airscrews are directed mainly at increasing passenger comfort and extending the service life of aeroplane equipment.

Details

Aircraft Engineering and Aerospace Technology, vol. 13 no. 12
Type: Research Article
ISSN: 0002-2667

Open Access
Article
Publication date: 29 December 2021

M'Hamed El-Louh, Mohammed El Allali and Fatima Ezzaki

In this work, the authors are interested in the notion of vector valued and set valued Pettis integrable pramarts. The notion of pramart is more general than that of…

Abstract

Purpose

In this work, the authors are interested in the notion of vector valued and set valued Pettis integrable pramarts. The notion of pramart is more general than that of martingale. Every martingale is a pramart, but the converse is not generally true.

Design/methodology/approach

In this work, the authors present several properties and convergence theorems for Pettis integrable pramarts with convex weakly compact values in a separable Banach space.

Findings

The existence of the conditional expectation of Pettis integrable mutifunctions indexed by bounded stopping times is provided. The authors prove the almost sure convergence in Mosco and linear topologies of Pettis integrable pramarts with values in (cwk(E)) the family of convex weakly compact subsets of a separable Banach space.

Originality/value

The purpose of the present paper is to present new properties and various new convergence results for convex weakly compact valued Pettis integrable pramarts in Banach space.

Details

Arab Journal of Mathematical Sciences, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1319-5166

Keywords

Book part
Publication date: 31 December 2010

M.C. Mirow

This chapter examines ways the Spanish Constitution of 1812, also known as the Constitution of Cádiz, has been viewed in historical and constitutional thought. The…

Abstract

This chapter examines ways the Spanish Constitution of 1812, also known as the Constitution of Cádiz, has been viewed in historical and constitutional thought. The document is a liberal constitution establishing constitutional rights, a representative government, and a parliamentary monarchy. It influenced ideas of American equality within the Spanish Empire, and its traces are observed in the process of Latin American independence. To these accepted views, one must add that the Constitution was a lost moment in Latin American constitutional development. By the immediate politicization of constitutionalism after 1812, the document marks the beginning of constitutional difficulties in the region.

Details

Studies in Law, Politics and Society
Type: Book
ISBN: 978-0-85724-615-8

Book part
Publication date: 15 March 2022

Wonlop Writthym Buachoom

This chapter focuses on information efficiency as provided by fair value accounting (FVA) and corporate governance (CG) practices in an emerging market. Positive…

Abstract

This chapter focuses on information efficiency as provided by fair value accounting (FVA) and corporate governance (CG) practices in an emerging market. Positive accounting theory was adopted as an empirical model to test the relationship between information efficiency and stock prices. Data for the period 2007–2020 from 576 listed firms on the Stock Exchange of Thailand were collected, tested, and analyzed using a fixed effect estimator. The results indicate that investors in the stock market trust the use of publicized efficient information as provided by FVA and CG practices in making their investment decisions, when FVA and CG proxies were found to significantly influence stock prices. Hence, this evidence implies that information efficiency leads to better firm values in an emerging market.

Details

Advances in Pacific Basin Business, Economics and Finance
Type: Book
ISBN: 978-1-80117-313-1

Keywords

Book part
Publication date: 2 September 2016

Roland Pérez

The goal of this chapter is to discuss the foundations of ‘modern finance’, its paradigm and conceptual framework, its methods and tools, its practices and results, its…

Abstract

Purpose

The goal of this chapter is to discuss the foundations of ‘modern finance’, its paradigm and conceptual framework, its methods and tools, its practices and results, its governance and regulation.

Approach

The first part presents the characteristics of ‘modern finance’ and its negative effects. The second part analyses the efforts made to remedy those effects and argue about the need for a real reform.

Findings

Several aspects are pointed, for example an unreasonable ‘normality’, incentives that encourage excess, the spread of subprime crisis, etc. The contemporary finance is a ‘giant with clay feet’.

Originality/value

We need to proceed with a dual reembeddedness of finance in the economy and economy in society.

Details

Finance Reconsidered: New Perspectives for a Responsible and Sustainable Finance
Type: Book
ISBN: 978-1-78560-980-0

Keywords

Content available
Book part
Publication date: 20 June 2017

David Shinar

Abstract

Details

Traffic Safety and Human Behavior
Type: Book
ISBN: 978-1-78635-222-4

Article
Publication date: 1 February 2006

Franz Dieter Fischer, Thomas Schaden, Fritz Appel and Helmut Clemens

In terms of continuum mechanics a twin is represented by the sudden appearance of a shear eigenstrain state in a distinct region. The corresponding elastic strain energy…

Abstract

In terms of continuum mechanics a twin is represented by the sudden appearance of a shear eigenstrain state in a distinct region. The corresponding elastic strain energy, the interface energy and the energy dissipated due to the irreversible character of the deformation process are investigated. If the total amount of these energy terms, spent by the twinning process, can be provided by the interaction energy of an external and/or internal stress state with respect to the twin shear eigenstrain, then either a deformation twin band or a twin nucleus may appear. Realistic estimations of the dimensions of deformation twins can be presented. This energetic interpretation of twinning is experimentally demonstrated for intermetallic TiAl.

Details

Multidiscipline Modeling in Materials and Structures, vol. 2 no. 2
Type: Research Article
ISSN: 1573-6105

Keywords

Book part
Publication date: 8 November 2003

Brian Moeran

Drawing on research in the worlds of advertising, magazines and fashion, this paper discusses how celebrities mediate between different fields of cultural production. By…

Abstract

Drawing on research in the worlds of advertising, magazines and fashion, this paper discusses how celebrities mediate between different fields of cultural production. By focusing on celebrity endorsements in advertising, it also outlines how film actors and actresses, athletes, models, pop singers, sportsmen and women mediate between producers and consumers via the products and services that they endorse. As economic mediators, celebrities’ actions have important strategic and financial implications for the corporations whose products they endorse. As cultural mediators, they give commodities personalities and perform across different media, linking different cultural fields into an integrated name economy.

Details

Anthropological Perspectives on Economic Development and Integration
Type: Book
ISBN: 978-0-76231-071-5

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