9,281 research outputs found
Diversity and profitability : evidence and future research directions / 1433
Includes bibliographical references (p. 23-24)
Designing a visible city for visually impaired users
This paper reports on an ongoing doctoral research project which aims to identify the main barriers to access within the built environment for persons with a visual impairment. The research seeks to investigate whether these barriers are common for all types of visual impairment and degree of vision loss and if so, what inclusive design solutions can accommodate the needs of the majority of visually impaired users. An access audit has been conducted within Glasgow city centre which sought to quantify the number and type of hazards present within a typical built environment. This was followed up by a questionnaire which asked participants to rate factors which may prevent them from making independent visits to their nearest city centre including psychological factors, physical features and obstructions resulting from the presence of street furniture. Participants also indicated the colours and contrasts which they find easiest to detect within the built environment. These findings will be used to inform the creation of a new set of design guidelines to assist designers, architects and urban planners as to how they can provide more accessible and inclusive environments for the visually impaired population
New Distribution Record for the Endangered Crawling Water Beetle Brychius Hungerfordi (Coleoptera: Haliplidae) and Notes on Seasonal Abundance and Food Preferences
The Federally beetle, Brychius hungerfordi, has been discovered at a new location in Northern Lower Peninsula of Michigan. We also report preliminary data on a seasonal variation in relative abundance and on its possible food plants
Advanced fiber placement of composite fuselage structures
The Hercules/NASA Advanced Composite Technology (ACT) program will demonstrate the low cost potential of the automated fiber placement process. The Hercules fiber placement machine was developed for cost effective production of composite aircraft structures. The process uses a low cost prepreg tow material form and achieves equivalent laminate properties to structures fabricated with prepreg tape layup. Fiber placement demonstrations planned for the Hercules/NASA program include fabrication of stiffened test panels which represent crown, keel, and window belt segments of a typical transport aircraft fuselage
Acceleration-assisted entanglement harvesting and rangefinding
We study entanglement harvested from a quantum field through local
interaction with Unruh-DeWitt detectors undergoing linear acceleration. The
interactions allow entanglement to be swapped locally from the field to the
detectors. We find an enhancement in the entanglement harvesting by two
detectors with anti-parallel acceleration over those with inertial motion. This
enhancement is characterized by the presence of entanglement between two
detectors that would otherwise maintain a separable state in the absence of
relativistic motion (with the same distance of closest approach in both cases).
We also find that entanglement harvesting is degraded for two detectors
undergoing parallel acceleration in the same way as for two static, comoving
detectors in a de Sitter universe. This degradation is known to be different
from that of two inertial detectors in a thermal bath. We comment on the
physical origin of the harvested entanglement and present three methods for
determining distance between two detectors using properties of the harvested
entanglement. Information about the separation is stored nonlocally in the
joint state of the accelerated detectors after the interaction; a single
detector alone contains none. We also find an example of entanglement sudden
death exhibited in parameter space.Comment: 17 pages, 6 figures. Version 2 updated to address referee comments
and minor correction
Size Estimate of a Local Population of Brychius Hungerfordi (Coleoptera: Haliplidae)
Much of the natural history of the endangered crawling water beetle, Brychius hungerfordi, is unknown. Population estimates have only been surmised. We have measured, using a mark and recapture technique, a localize population of the beetle in a pool on the East Branch of the Maple River, Emmet County, Michigan. The average population during July 2001 was found to be 1052 individuals with a range of 43 (highest estimate â lowest estimate). A three-year study of the relative abundance of the beetle in the same pool suggests that the population has remained relatively constant
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