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Article
Publication date: 6 May 2024

Hansu Kim, Luke Crispo, Nicholas Galley, Si Mo Yeon, Yong Son and Il Yong Kim

The lightweight design of aircraft seats can significantly improve fuel efficiency and reduce greenhouse gas emissions. Metal additive manufacturing (MAM) can produce lightweight…

Abstract

Purpose

The lightweight design of aircraft seats can significantly improve fuel efficiency and reduce greenhouse gas emissions. Metal additive manufacturing (MAM) can produce lightweight topology-optimized designs with improved performance, but limited build volume restricts the printing of large components. The purpose of this paper is to design a lightweight aircraft seat leg structure using topology optimization (TO) and MAM with build volume restrictions, while satisfying structural airworthiness certification requirements.

Design/methodology/approach

TO was used to determine a lightweight conceptual design for the seat leg structure. The conceptual design was decomposed to meet the machine build volume, a detailed CAD assembly was designed and print orientation was selected for each component. Static and dynamic verification was performed, the design was updated to meet the structural requirements and a prototype was manufactured.

Findings

The final topology-optimized seat leg structure was decomposed into three parts, yielding a 57% reduction in the number of parts compared to a reference design. In addition, the design achieved an 8.5% mass reduction while satisfying structural requirements for airworthiness certification.

Originality/value

To the best of the authors’ knowledge, this study is the first paper to design an aircraft seat leg structure manufactured with MAM using a rigorous TO approach. The resultant design reduces mass and part count compared to a reference design and is verified with respect to real-world aircraft certification requirements.

Book part
Publication date: 4 September 2020

Lee B. Wilson

Historians have long understood that transforming people into property was the defining characteristic of Atlantic World slavery. This chapter examines litigation in British

Abstract

Historians have long understood that transforming people into property was the defining characteristic of Atlantic World slavery. This chapter examines litigation in British colonial Vice Admiralty Courts in order to show how English legal categories and procedures facilitated this process of dehumanization. In colonies where people were classified as chattel property, litigants transformed local Vice Admiralty Courts into slave courts by analogizing human beings to ships and cargo. Doing so made sound economic sense from their perspective; it gave colonists instant access to an early modern English legal system that was centered on procedures and categories. But for people of African descent, it had decidedly negative consequences. Indeed, when colonists treated slaves as property, they helped to create a world in which Africans were not just like things, they were things. Through the very act of categorization, they rendered factual what had been a mere supposition: that Africans were less than human.

Details

Studies in Law, Politics, and Society
Type: Book
ISBN: 978-1-83982-297-1

Keywords

Article
Publication date: 1 February 1949

JOS. GALEA

UP to the present the knowledge of these archives is most unsatisfactory. There is only one complete catalogue, which apparently was begun by Dr. L. Vella during the first half of…

Abstract

UP to the present the knowledge of these archives is most unsatisfactory. There is only one complete catalogue, which apparently was begun by Dr. L. Vella during the first half of the nineteenth century, and completed in 1890 by Doctors Camilleri and Briffa. This catalogue is a manuscript volume written in the Italian language, and has never been published in its entirety. A copy exists, however, also in manuscript, at the headquarters of the Sovereign Military Order of St. John in Rome.

Details

Journal of Documentation, vol. 5 no. 1
Type: Research Article
ISSN: 0022-0418

Article
Publication date: 1 July 1963

THE new library building has been open for six months now. It is pleasantly situated in an area of new buildings, and occupies a prominent island site just on the edge of the…

Abstract

THE new library building has been open for six months now. It is pleasantly situated in an area of new buildings, and occupies a prominent island site just on the edge of the shopping centre. The old library was in the middle of a shopping area, and it has been interesting to note that our removal from that site has had a more considerable effect on the traffic pattern than one would have thought.

Details

New Library World, vol. 65 no. 1
Type: Research Article
ISSN: 0307-4803

Article
Publication date: 1 April 1981

A Crown Court hearing of a charge of applying a false A description under S.2, Trade Descriptions Act, 1968, is given in some detail under Legal Proceedings in this issue of BFJ…

Abstract

A Crown Court hearing of a charge of applying a false A description under S.2, Trade Descriptions Act, 1968, is given in some detail under Legal Proceedings in this issue of BFJ. It concerns using the word “ham”, ie., the natural leg of a single pig, to various pieces from several pigs, deboned, defatted, “tumbled, massaged and cooked” in a mould shaped to a leg of ham, from which the average purchaser would find it impossible to distinguish. As the defence rightly claimed, this process has been used for at least a couple of decades, and the product forms a sizeable section of the bacon trade. Evidence by prosecution witnesses, experienced shop managers, believed the product to be the genuine “ham”. There is nothing detrimental about the meat, save that it tends to contain an excess of added water, but this applies to many meat products today; or that the manufacturers are setting out to cheat the consumer. What offends is the description given to the product. Manufacture was described in detail—a county trading standards officer inspected the process at the defendant company's Wiltshire factory, witness to the extent of their co‐operation—and was questioned at great length by defending counsel. Specimens of the product were exhibited and the jury were treated to a tasting test—presumably designed to refute prosecution's claim that the meat was of “poor value”. The trial judge said the jury had no doubt been enlightened as to the methods of manufacturing ham. The marketing of the product was also a subject of examination.

Details

British Food Journal, vol. 83 no. 4
Type: Research Article
ISSN: 0007-070X

Abstract

Details

Mad Muse: The Mental Illness Memoir in a Writer's Life and Work
Type: Book
ISBN: 978-1-78973-810-0

Article
Publication date: 1 April 1949

It has often been said that a great part of the strength of Aslib lies in the fact that it brings together those whose experience has been gained in many widely differing fields…

Abstract

It has often been said that a great part of the strength of Aslib lies in the fact that it brings together those whose experience has been gained in many widely differing fields but who have a common interest in the means by which information may be collected and disseminated to the greatest advantage. Lists of its members have, therefore, a more than ordinary value since they present, in miniature, a cross‐section of institutions and individuals who share this special interest.

Details

Aslib Proceedings, vol. 1 no. 4
Type: Research Article
ISSN: 0001-253X

Article
Publication date: 1 June 2000

Bristol Lane Voss

Some people are pushing the theory that the upcoming December 31st is the eve of the real millennium. Whether it's because of deeply held ideological beliefs, an obsession with…

Abstract

Some people are pushing the theory that the upcoming December 31st is the eve of the real millennium. Whether it's because of deeply held ideological beliefs, an obsession with calendars, or because they were too wrapped up with Y2K to really have a good time last year, who cares. Let's cut 'em some slack and toast to their right to their own point of view.

Details

Journal of Business Strategy, vol. 21 no. 6
Type: Research Article
ISSN: 0275-6668

Article
Publication date: 1 November 1999

Constantin Virgil Negoita

Provides a personal view of the development of the theories and applications of fuzzy systems which were first introduced in the 1960s. Details the interrelationships between the…

Abstract

Provides a personal view of the development of the theories and applications of fuzzy systems which were first introduced in the 1960s. Details the interrelationships between the pioneering proponents of fuzzy theory. Concentrates in part I on the historical beginnings of the field and in part II continues to provide personal insights into contemporary studies.

Details

Kybernetes, vol. 28 no. 8
Type: Research Article
ISSN: 0368-492X

Keywords

Article
Publication date: 17 August 2018

Jane Johnson Otto and Laura Bowering Mullen

From laying the groundwork for the successful passage of a university-wide open access (OA) policy, through the development and planning that goes into a successful…

Abstract

Purpose

From laying the groundwork for the successful passage of a university-wide open access (OA) policy, through the development and planning that goes into a successful implementation, to “Day One” when the official university policy goes into effect, there is a long list of factors that affect faculty interest, participation and compliance. The paper aims to discuss this issue.

Design/methodology/approach

The authors, Mullen and Otto, having detailed earlier aspects of the Rutgers University OA policy passage and implementation planning, analyze and share the specifics that followed the rollout of the policy and that continue to affect participation.

Findings

This case study presents some strategies and systems used to enhance author self-archiving in the newly minted Scholarly Open Access at Rutgers (SOAR) portal of the Rutgers institutional repository, including involvement of departmental liaison librarians, effective presentation of metrics and a focus on targeted communication with faculty.

Originality/value

Roadblocks encountered as faculty began to deposit their scholarship and lessons learned are a focus. Early reaction from faculty and graduate students (doctoral students and postdocs) to various aspects of the policy as well as the use of SOAR for depositing their work are included.

Details

Library Management, vol. 40 no. 1/2
Type: Research Article
ISSN: 0143-5124

Keywords

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