Self-teaching digital-computer program for fail-operational control of a turbojet engine in a sea-level test stand

The design and evaluation are described of a digital turbojet engine control which is capable of sensing catastrophic failures in either the engine rotor speed or the compressor discharge static-pressure signal and is capable of switching control modes to maintain near normal operation. The control program was developed for and tested on a turbojet engine located in a sea-level test stand. The control program is also capable of acquiring all the data that are necessary for the fail-operational control to function

Flueric-controller pneumatic stepping motor system

Nutating stepping motor consists of an output rotating gear and a nutating gear. A flueric logic circuit controls the nutating motor. The complete system constitutes a reliable, open loop actuator system with inherently high output stiffness, reasonable slewing speeds and small step size

Dynamic response of Mach 2.5 axisymmetric inlet with 40 percent supersonic internal area contraction

Results of experimental tests conducted on a supersonic, mixed compression, axisymmetric inlet are presented. The inlet is designed for operation at Mach 2.5 with a turbofan engine (TF-30). The inlet was terminated with either a choked-orifice plate or a long pipe with variable area choked exit plug. Frequency responses were obtained for selected static pressures in the diffuser. These pressures were selected as potential control signals for terminal shock control. Frequency responses were obtained for the Mach 2 and 2.5 conditions for different terminations. Responses also were obtained with and without cowl bleed. Internal disturbances were produced by sinusoidally varying the inlet overboard bypass doors at frequencies out to 100 hertz

European overview of sustainable policies and approaches in COST C25 member countries

The implementation of the principles and methods towards a Sustainable Construction varies across different countries in Europe. In some countries, the sustainability of the construction sector has been effectively taken into consideration over the last years, while in other its implementation is at an initial stage. Many reasons may be pointed out for this situation. Different countries have different understandings of what is entailed in Sustainable Construction. Different cultural and educational backgrounds, along with different priorities in each country, are also contributing for the lack of a common European approach. General frameworks, aiming to cover every aspect of Sustainable Construction and to provide a consistent and integrated approach, such as Agenda 21 for Sustainable Construction, gave a major advance in the search for a common approach for the construction sector. However, general agreed methodologies and tools to make this common approach operational are still missing.European Science Foundation - COST Action C2

Does owning a pet protect older people against loneliness?

This article has been made available through the Brunel Open Access Publishing Fund.Pet ownership is thought to make a positive contribution to health, health behaviours and the general well-being of older people. More specifically pet ownership is often proposed as a solution to the problem of loneliness in later life and specific 'pet based' interventions have been developed to combat loneliness. However the evidence to support this relationship is slim and it is assumed that pet ownership is a protection against loneliness rather than a response to loneliness. The aim of this paper is to examine the association between pet ownership and loneliness by exploring if pet ownership is a response to, or protection against, loneliness using Waves 0-5 from the English Longitudinal Study of Ageing (ELSA)

A data-driven synthesis of research evidence for domains of hearing loss, as reported by adults with hearing loss and their communication partners

A number of assessment tools exist to evaluate the impact of hearing loss, with little consensus among researchers as to either preference or psychometric adequacy. The item content of hearing loss assessment tools should seek to capture the impact of hearing loss on everyday life, but to date no one has synthesized the range of hearing loss complaints from the perspectives of the person with hearing loss and their communication partner. The current review aims to synthesize the evidence on person with hearing loss- and communication partner-reported complaints of hearing loss. Searches were conducted in Cos Conference Papers Index, the Cumulative Index to Nursing and Allied Health Literature, Excerpta Medica Database, PubMed, Web of Science, and Google Scholar to identify publications from May 1982 to August 2015. A manual search of four relevant journals updated the search to May 2017. Of the 9,516 titles identified, 78 records (comprising 20,306 participants) met inclusion criteria and were taken through to data collection. Data were analyzed using meta-ethnography to form domains representing the person with hearing loss- and communication partner-reported complaints of hearing loss as reported in research. Domains and subdomains mutual to both perspectives are related to ‘‘Auditory’’ (listening, communicating, and speaking), ‘‘Social’’ (relationships, isolation, social life, occupational, and interventions), and ‘‘Self’’ (effort and fatigue, emotions, identity, and stigma). Our framework contributes fundamental new knowledge and a unique resource that enables researchers and clinicians to consider the broader impacts of hearing loss. Our findings can also be used to guide questions during diagnostic assessment and to evaluate existing measures of hearing loss

Perceptions of Successful Aging Among Diverse Elders With Late-Life Disability

Purpose: Researchers often use the term “successful aging” to mean freedom from disability, yet the perspectives of elders living with late-life disability have not been well described. The purpose of this study was to explore the meaning of successful aging among a diverse sample of community-dwelling elders with late-life disability. Design and Methods: Using qualitative grounded theory methodology, we interviewed 56 African American, White, Cantonese-speaking Chinese, and Spanish-speaking Latino disabled elders who participate in On Lok Lifeways, a Program of All-inclusive Care for the Elderly. Through semi-structured interviews with open-ended questions, we explored the elders’ perceptions of what successful aging and being old meant to them. Results: Despite experiencing late-life disability, most participants felt they had aged successfully. An overarching theme was that aging results in Living in a New Reality, with two subthemes: Acknowledging the New Reality and Rejecting the New Reality. Participants achieved successful aging by using adaptation and coping strategies to align their perception of successful aging with their experiences. Themes were common across race/ethnic groups but certain strategies were more prominent among different groups. Implications: Across race and ethnic groups, most of these participants with late-life disability felt they had aged successfully. Thus, successful aging involves subjective criteria and has a cultural context that is not captured in objective measurements. Understanding elders’ perception will help establish common ground for communication between clinicians and elders and identify the most appropriate interventions to help elders achieve and maintain the experience of successful aging

Perceptions of Successful Aging Among Diverse Elders With Late-Life Disability

Purpose: Researchers often use the term “successful aging” to mean freedom from disability, yet the perspectives of elders living with late-life disability have not been well described. The purpose of this study was to explore the meaning of successful aging among a diverse sample of community-dwelling elders with late-life disability. Design and Methods: Using qualitative grounded theory methodology, we interviewed 56 African American, White, Cantonese-speaking Chinese, and Spanish-speaking Latino disabled elders who participate in On Lok Lifeways, a Program of All-inclusive Care for the Elderly. Through semi-structured interviews with open-ended questions, we explored the elders’ perceptions of what successful aging and being old meant to them. Results: Despite experiencing late-life disability, most participants felt they had aged successfully. An overarching theme was that aging results in Living in a New Reality, with two subthemes: Acknowledging the New Reality and Rejecting the New Reality. Participants achieved successful aging by using adaptation and coping strategies to align their perception of successful aging with their experiences. Themes were common across race/ethnic groups but certain strategies were more prominent among different groups. Implications: Across race and ethnic groups, most of these participants with late-life disability felt they had aged successfully. Thus, successful aging involves subjective criteria and has a cultural context that is not captured in objective measurements. Understanding elders’ perception will help establish common ground for communication between clinicians and elders and identify the most appropriate interventions to help elders achieve and maintain the experience of successful aging