Search results

1 – 10 of over 1000
To view the access options for this content please click here
Article
Publication date: 3 July 2017

Philipp Heinemann, Michael Schmidt, Felix Will, Sascha Kaiser, Christoph Jeßberger and Mirko Hornung

The paper aims to assess the potential of aircraft operation from city centres to achieve shortened travel times and the involved aircraft design process.

Abstract

Purpose

The paper aims to assess the potential of aircraft operation from city centres to achieve shortened travel times and the involved aircraft design process.

Design/methodology/approach

The paper describes the methodical approach and iterative procedure of the design process. An assessment of potential technologies is conducted to provide the required enhancements to fulfil the constraints following an inner-city operation. Operational procedures were analysed to reduce the noise propagation through flight path optimization. Furthermore, a ground-based assisted take-off system was conceived to lower required take-off field length and to prevent engine sizing just for the take-off case. Cabin design optimization for a fast turnaround has been conducted to ensure a wide utilization spectrum. The results prove the feasibility of an aircraft developed for inner city operation.

Findings

A detailed concept for a 60-passenger single aisle aircraft is proposed for an Entry-Into-Service year 2040 with a design range of 1,500 nautical miles for a load factor of 90 per cent. Although the design for Short Take-off and Landing and low noise operation had to be traded partly with cruise efficiency, a noteworthy reduction in fuel burn per passenger and nautical mile could be achieved against current aircraft.

Practical implications

The findings will contribute to the evaluation of the feasibility and impact of the Flightpath 2050 goal of a 4-h door-to-door by providing a feasible but ambitious example. Furthermore, it highlights possible bottlenecks and problems faced when realizing this goal.

Originality/value

The paper draws its value from the consideration of the overall sizing effects at aircraft level and from a holistic view on an inner-city airport/aircraft concept design for a 4-h door-to-door goal.

Details

Aircraft Engineering and Aerospace Technology, vol. 89 no. 4
Type: Research Article
ISSN: 1748-8842

Keywords

To view the access options for this content please click here
Article
Publication date: 1 October 2007

Bonnie Lee, Jason Solowoniuk and Mary Fong

Trauma and adverse childhood events are found in the pre‐immigration histories of a cohort of four Chinese Canadian pathological gamblers. The nature of their traumatic…

Abstract

Trauma and adverse childhood events are found in the pre‐immigration histories of a cohort of four Chinese Canadian pathological gamblers. The nature of their traumatic experiences, consisting of loss and abandonment, neglect and deprivation, physical and emotional abuse, socioeconomic and political oppression, is elucidated and described. The impact of pre‐immigration trauma and its relationship to the development of pathological gambling post‐immigration are discussed. Upon further corroboration of the existence of pre‐immigration trauma among Chinese and Asian immigrants in future studies, training of counsellors to incorporate an in‐depth pre‐immigration history in the assessment and treatment protocol of immigrants manifesting pathological gambling is recommended.

Details

International Journal of Migration, Health and Social Care, vol. 3 no. 2
Type: Research Article
ISSN: 1747-9894

Keywords

To view the access options for this content please click here
Executive summary
Publication date: 18 January 2021

CONGO-KINSHASA: Tshisekedi faces coalition dilemmas

Details

DOI: 10.1108/OXAN-ES258854

ISSN: 2633-304X

Keywords

Geographic
Topical
To view the access options for this content please click here
Executive summary
Publication date: 18 February 2020

CONGO-KINSHASA: Budget gap will add to Felix's woes

Details

DOI: 10.1108/OXAN-ES250765

ISSN: 2633-304X

Keywords

Geographic
Topical
To view the access options for this content please click here
Expert briefing
Publication date: 2 November 2020

Although he has not formally ended the coalition government between his Camp for Change (CACH) and former President Joseph Kabila’s Common Front for the Congo (FCC), the…

Details

DOI: 10.1108/OXAN-DB257259

ISSN: 2633-304X

Keywords

Geographic
Topical
To view the access options for this content please click here
Article
Publication date: 1 September 1961

An introductory course for graduates entering information or special library work, and other persons put in charge of library or information departments without previous…

Abstract

An introductory course for graduates entering information or special library work, and other persons put in charge of library or information departments without previous experience, will be held at Aslib from 30th October to 3rd November 1961. Lectures will introduce students to the basic principles governing the handling of information, and acquaint them with some of the practical details of the operation of an information service or library. There will be a practical session and a discussion session, and visits to a number of libraries and information departments, including Aslib library and information department, have been arranged. The lectures will be given by the Education Officer, Mr Jack Bird. The fee for the course will be £10. Further details and application forms can be obtained from Aslib.

Details

Aslib Proceedings, vol. 13 no. 9
Type: Research Article
ISSN: 0001-253X

To view the access options for this content please click here
Executive summary
Publication date: 27 February 2020

CONGO-KINSHASA: Competing budget demands pose risks

Details

DOI: 10.1108/OXAN-ES250969

ISSN: 2633-304X

Keywords

Geographic
Topical
To view the access options for this content please click here
Article
Publication date: 1 December 1965

The 15th annual conference of the Aslib Aeronautical Group is to be held on Friday 25th to Sunday 27th March 1966, at the College of Aeronautics, Cranfield. A session…

Abstract

The 15th annual conference of the Aslib Aeronautical Group is to be held on Friday 25th to Sunday 27th March 1966, at the College of Aeronautics, Cranfield. A session which should provoke discussion is on ‘Saving time in the library’. At this, speakers will present short papers on the pros and cons of such topics as periodical circulation, abstracts versus title‐listing, and printed indexes versus catalogue cards; discussion will follow. The technical paper will be on ‘Wind tunnels’ and will be given by Mr R. Hills, Chief Executive of the Aircraft Research Association Ltd. A historical paper will be presented by Air Comm. A. Wheeler, and a paper entitled ‘Make your own thesaurus’ by Mr Stevens of the Ministry of Defence, Navy Department, NSTIC. More information will be given later and application forms will be sent to members of the Aeronautical Group. Others who wish to attend should apply to Mr E. J.MacAdam, 74 Stancliffe Road, Bedford.

Details

Aslib Proceedings, vol. 17 no. 12
Type: Research Article
ISSN: 0001-253X

To view the access options for this content please click here
Article
Publication date: 1 December 1964

Miss Elizabeth Petree has been appointed Administrative Assistant to the Director of Aslib, and joined the staff in November. Miss Petree was Deputy Secretary of the…

Abstract

Miss Elizabeth Petree has been appointed Administrative Assistant to the Director of Aslib, and joined the staff in November. Miss Petree was Deputy Secretary of the College of General Practitioners from 1954 to 1964. She was earlier employed at the Royal Institute of International Affairs.

Details

Aslib Proceedings, vol. 16 no. 12
Type: Research Article
ISSN: 0001-253X

To view the access options for this content please click here
Article
Publication date: 6 August 2019

Tessa Jane Gordelier, Philipp Rudolf Thies, Louis Turner and Lars Johanning

Additive manufacturing or “3D printing” is a rapidly expanding sector and is moving from a prototyping service to a manufacturing service in its own right. With a…

Abstract

Purpose

Additive manufacturing or “3D printing” is a rapidly expanding sector and is moving from a prototyping service to a manufacturing service in its own right. With a significant increase in sales, fused deposition modelling (FDM) printers are now the most prevalent 3D printer on the market. The increase in commercial manufacturing necessitates an improved understanding of how to optimise the FDM printing process for various product mechanical properties. This paper aims to identify optimum print parameters for the FDM process to achieve maximum tensile strength through a review of recent studies in this field.

Design/methodology/approach

The effect of the governing printing parameters on the tensile strength of printed samples will be considered, including material selection, print orientation, raster angle, air gap and layer height.

Findings

The key findings include material recommendations, such as the use of emerging print materials like polyether-ether-ketone (PEEK), to produce samples with tensile strength over 200 per cent that of conventional materials such as acrylonitrile butadiene styrene (ABS). Amongst other parameters, it is shown that printing in the “upright” orientation should be avoided (samples can be up to 50 per cent weaker in this orientation) and air gap and raster width should be concurrently optimised to ensure good “inter-raster” bonding. The optimal choice of raster angle depends on print material; in ABS for example, selecting a 0° raster angle over a 90° angle can increase tensile strength by up to 100 per cent.

Originality/value

The paper conclusions provide researchers and practitioners with an up-to-date, single point reference, highlighting a series of robust recommendations to optimise the tensile strength of FDM-printed samples. Improving the mechanical performance of FDM-printed samples will support the continued growth of this technology as a viable production technique.

Details

Rapid Prototyping Journal, vol. 25 no. 6
Type: Research Article
ISSN: 1355-2546

Keywords

1 – 10 of over 1000