Evidence of corrosion of reinforncing steel in concrete has become a familiar sight on United States highways and parking structures. Decks and substructures expected to provide…
Abstract
Evidence of corrosion of reinforncing steel in concrete has become a familiar sight on United States highways and parking structures. Decks and substructures expected to provide maintenance‐free service for 40 years often require major repair within 5 to 10 years, and frequently have to be replaced after only 15 years of service. At first, poor construction practice and excessive loading were the primary factors blamed by most highway engineers. However, a geographical distribution of the problem pointed to a relationship with salt used to melt snow and ice, or present in seawater and salt spray. Only recently, as research has continued and as field evaluation tools were developed, has corrosion of reinforcing steel been understood as the major cause of this problem.
Sarah E. Scales and Jennifer A. Horney
Prior to the onset of the COVID-19 pandemic, women did nearly three-quarters of the world’s unpaid work. As institutional supports, including in-person school and community-based…
Abstract
Prior to the onset of the COVID-19 pandemic, women did nearly three-quarters of the world’s unpaid work. As institutional supports, including in-person school and community-based care for children, the elderly, and the disabled vanished early in the pandemic, many women’s caregiving responsibilities increased. In some cases, opportunities for paid employment disappeared due to layoffs and furloughs, while in others, paid work was no longer possible without access to the missing institutional supports. Either way, access to needed supports – financial, practical, and social – was diminished. The lapse of needed supports also had severe impacts on subgroups of women, including pregnant and post-partum women. A range of considerations – vaccine safety, social interaction and infection risk, disease severity – have posed serious challenges for pregnant and post-partum women. Across the board, women’s need for continuous access to better social, financial, and practical supports at home, in the community, and in the workplace was made even more evident by the COVID-19 pandemic.
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In September 1985, eight sets of children's books from Australia began an odyssey that will take them into all fifty states and Canada by the end of 1988. The books— and the…
Abstract
In September 1985, eight sets of children's books from Australia began an odyssey that will take them into all fifty states and Canada by the end of 1988. The books— and the resource, reference and display materials that accompany them—were chosen specifically for their value in introducing non‐Australians to Australia and her children's literature. They also provide an ideal starting point for library collection development.
As the set of people using computers becomes larger and less cohesive, it is becoming important to educate users about their ethical responsibilities. Design of an effective…
Abstract
As the set of people using computers becomes larger and less cohesive, it is becoming important to educate users about their ethical responsibilities. Design of an effective campus computer ethics policy requires awareness of numerous cultural, technical and legal issues. Especially important are the cultural splits between power users and utilitarian users, and between “old world” and “new world” philosophies of computer ethics. Discusses those issues and presents the University of Georgia’s ethics policy as a model to aid those developing similar policies at other institutions.
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The following is an annotated list of materials dealing with orientation to library facilities and services, instruction in the use of information resources, and research and…
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The following is an annotated list of materials dealing with orientation to library facilities and services, instruction in the use of information resources, and research and computer skills related to retrieving and using information. The thirteenth annual such review in Reference Services Review, the article covers items in English published in 1986. A few items are without annotations because the compiler was unable to secure copies of them for this review.
Film provides an alternative medium for assessing our interpretations of cultural icons. This selective list looks at the film and video sources for information on and…
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Film provides an alternative medium for assessing our interpretations of cultural icons. This selective list looks at the film and video sources for information on and interpretations of the life of Woody Guthrie.
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Asya Draganova and Shane Blackman
The term Canterbury Sound emerged in the late 1960s and early 1970s to refer to a signature style within psychedelic and progressive rock developed by bands such as Caravan and…
Abstract
The term Canterbury Sound emerged in the late 1960s and early 1970s to refer to a signature style within psychedelic and progressive rock developed by bands such as Caravan and Soft Machine as well as key artists including Robert Wyatt and Kevin Ayers. This chapter explores Canterbury as a metaphor and reality, a symbolic space of music inspiration which has produced its distinctive ‘sound’.
Drawing on ethnographic fieldwork, particularly observations and interviews with music artists and cultural intermediates (Bourdieu, 1993), we suggest that the notion of the Canterbury Sound – with its affinity for experimentation, distinctive chord progressions and jazz allusions in a rock music format – is perceived as a continuing artistic and aesthetic influence. We interpret the genealogy of the Canterbury Sound alternativity through discussions focused on the position of the ‘Sound’ within contemporary heritage discourses, the metaphorical and geographical implications of place in relation to popular music, and cultural longevity of the phenomenon.
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Mike Simpson and Anthony J. Docherty
The small business sector of the UK economy is extremely important and the government expends considerable resources in providing support services for this sector. This paper…
Abstract
The small business sector of the UK economy is extremely important and the government expends considerable resources in providing support services for this sector. This paper investigated the reasons why SMEs move from traditional commerce to e‐commerce, the efficacy of the support services and the barriers encountered by SMEs adopting e‐commerce. The research methodology involved literature review and interviews with SMEs’ owner‐managers and a UK Online business adviser. It was found that at least two “e‐commerce stars” used by the government to promote its support services had in fact not used those services. The historical relationship problems between Business Link and SMEs were still causing problems. Cost was not seen as an inhibitor to adopting e‐commerce. Some evidence was emerging that e‐commerce may be able to save failing or struggling businesses. Other unexpected outcomes were that e‐commerce had social benefits for SMEs’ owners in reducing working hours yet still increased sales.
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This paper aims to present airworthiness considerations regarding a shaft of an electric motor. A fatigue lifetime prediction analysis based on one-step load spectrum is performed…
Abstract
Purpose
This paper aims to present airworthiness considerations regarding a shaft of an electric motor. A fatigue lifetime prediction analysis based on one-step load spectrum is performed during high-cycle fatigue. Time-dependent normal and shear stress components are estimated using a high-fidelity digital twin built in Siemens PLM Nx Nastran as a finite element model (FEM). Linear and centrifugal acceleration as well as gyroscopic moment, motor torque, propeller thrust and thermal loads are considered. The equivalent cyclic degree of utilisation and a safety margin against the slip of a press-fitted shaft to rotor hub connection is estimated.
Design/methodology/approach
A load analysis using FEM is presented. The numerically obtained results are verified on an analytical and a semi-empirical basis.
Findings
The shaft of the electric motor can sustain 74 h of operation if burdened with aerobatic loads. Its load capacity equals 48% for the overall safety factor of 2.25.
Practical implications
The paper presents a specific, easily identifiable advance in knowledge that can be applicable in safety flight analysis issues.
Originality/value
The work presents a rotor of a novel lightweight electric motor for aircraft applications, which is a successor of the electric motor set recently in Extra 330E. The work delivers a computational estimation of the shaft life.
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Automotive subcontractor Ketlon turned to robot automation of machine tools to beat labour shortages and hold down costs. Project engineer John Russell talked to Jack Hollingum.