166 research outputs found
Collaboratively and at scale: lending CAPE’s experience to the challenge of describing knowledge mobilisation
Across Higher Education Institutions (HEIs) and in policy domains, there has been increased support for and investment in knowledge mobilisation activities and roles. At a time in which funding decision makers and awardees need to evidence the value of investments, questions arise: what is knowledge mobilisation, what does it do and why does it need investing in? Through our work in CAPE, we are seeking to contribute insight into the ways that academic policy engagement is enacted through knowledge mobilisation. We reflect on what our experience of knowledge mobilisation practice collaboratively and at scale tells us, and why a deeper appreciation of the way it works at systemic levels might be useful for the sector as it develops
Hyperspectral terahertz microscopy via nonlinear ghost-imaging
Ghost-imaging, based on single-pixel detection and multiple pattern illumination, is a crucial investigation tool in difficult-to-access wavelength regions. In the terahertz domain, where high-resolution imagers are mostly unavailable, Ghost-imaging is an optimal approach to embed the temporal dimension, creating a ‘hyperspectral’ imager. In this framework high-resolution is mostly out-of-reach. Hence, it is particularly critical to developing practical approaches for microscopy. Here we experimentally demonstrate Time-Resolved Nonlinear Ghost-Imaging, a technique based on near-field, optical-to-terahertz nonlinear conversion and detection of illumination patterns. We show how space-time coupling affects near-field time-domain imaging and we develop a complete methodology that overcomes fundamental systematic reconstruction issues. Our theoretical-experimental platform enables high-fidelity subwavelength imaging and carries relaxed constrains on the nonlinear generation crystal thickness. Our work establishes a rigorous framework to reconstruct hyperspectral images of complex samples inaccessible through standard fixed-time methods
The Vehicle, Fall 1988
Table of Contents
Cover LetterBob Zordanipage 3
Letter to Harrington StreetBob Zordanipage 4
The Only TruthBob Zordanipage 5
They\u27d Gone to a MovieMatt Mansfieldpage 6
The LocketMonica Grothpage 6
The Sleep of BabesMonica Grothpage 7
Techni-Color Characters in a Black and White TownMonica Grothpage 8
The HorseRodger Patiencepage 9
ValaciaRobyn Kerrpage 10
Gatsby\u27s LightJim Reedpage 11
Millions of MeJim Reedpage 12
View from the StreetsSteven M. Beamerpage 13
When Headlights on the HighwayMichael Salempage 23
Concrete AffairsMichael Salempage 24
The Middle of the StreetMichael Salempage 25
Scent of a StormMichael Salempage 26
The FishermanAngie Geraldpage 27
OrgansPatrick Peterspage 33
CarpentryPatrick Peterspage 34
FishingPatrick Peterspage 35
Autumn Poem for a Friend In a Printing PlantPatrick Peterspage 36https://thekeep.eiu.edu/vehicle/1051/thumbnail.jp
The Vehicle, Fall 1988
Table of Contents
Cover LetterBob Zordanipage 3
Letter to Harrington StreetBob Zordanipage 4
The Only TruthBob Zordanipage 5
They\u27d Gone to a MovieMatt Mansfieldpage 6
The LocketMonica Grothpage 6
The Sleep of BabesMonica Grothpage 7
Techni-Color Characters in a Black and White TownMonica Grothpage 8
The HorseRodger Patiencepage 9
ValaciaRobyn Kerrpage 10
Gatsby\u27s LightJim Reedpage 11
Millions of MeJim Reedpage 12
View from the StreetsSteven M. Beamerpage 13
When Headlights on the HighwayMichael Salempage 23
Concrete AffairsMichael Salempage 24
The Middle of the StreetMichael Salempage 25
Scent of a StormMichael Salempage 26
The FishermanAngie Geraldpage 27
OrgansPatrick Peterspage 33
CarpentryPatrick Peterspage 34
FishingPatrick Peterspage 35
Autumn Poem for a Friend In a Printing PlantPatrick Peterspage 36https://thekeep.eiu.edu/vehicle/1051/thumbnail.jp
Route to intelligent imaging reconstruction via terahertz nonlinear ghost imaging
Terahertz (THz) imaging is a rapidly emerging field, thanks to many potential applications in diagnostics, manufacturing, medicine and material characterisation. However, the relatively coarse resolution stemming from the large wavelength limits the deployment of THz imaging in micro- and nano-technologies, keeping its potential benefits out-of-reach in many practical scenarios and devices. In this context, single-pixel techniques are a promising alternative to imaging arrays, in particular when targeting subwavelength resolutions. In this work, we discuss the key advantages and practical challenges in the implementation of time-resolved nonlinear ghost imaging (TIMING), an imaging technique combining nonlinear THz generation with time-resolved time-domain spectroscopy detection. We numerically demonstrate the high-resolution reconstruction of semi-transparent samples, and we show how the Walsh–Hadamard reconstruction scheme can be optimised to significantly reduce the reconstruction time. We also discuss how, in sharp contrast with traditional intensity-based ghost imaging, the field detection at the heart of TIMING enables high-fidelity image reconstruction via low numerical-aperture detection. Even more striking—and to the best of our knowledge, an issue never tackled before—the general concept of “resolution” of the imaging system as the “smallest feature discernible” appears to be not well suited to describing the fidelity limits of nonlinear ghost-imaging systems. Our results suggest that the drop in reconstruction accuracy stemming from non-ideal detection conditions is complex and not driven by the attenuation of high-frequency spatial components (i.e., blurring) as in standard imaging. On the technological side, we further show how achieving efficient optical-to-terahertz conversion in extremely short propagation lengths is crucial regarding imaging performance, and we propose low-bandgap semiconductors as a practical framework to obtain THz emission from quasi-2D structures, i.e., structure in which the interaction occurs on a deeply subwavelength scale. Our results establish a comprehensive theoretical and experimental framework for the development of a new generation of terahertz hyperspectral imaging devices
Gender differences in the accuracy of dietary assessment methods to measure energy intake in adults:protocol for a systematic review and meta-analysis
Introduction Diet is an important modifiable risk factor for many chronic diseases. Measurement of dietary intake usually relies on self-report, subject to multiple biases. There is a need to understand gender differences in the self-report of dietary intake and the implications of any differences in targeting nutrition interventions. Literature in this area is limited and it is currently unknown whether self-report dietary assessment methods are equally accurate for women and men. The aim of this systematic review is to determine whether there are differences by gender in reporting energy intake compared with a reference measure of total energy expenditure. Methods and analysis A comprehensive search of published original research studies will be performed in MEDLINE, Scopus, Web of Science, EMBASE, CINAHL and Cochrane library. Original research studies will be included if they were conducted in free-living/unhospitalised adults and included a measure for both women and men of (a) self-reported energy intake and (b) total energy expenditure by doubly labelled water. One author will conduct the electronic database searches, two authors will independently screen studies, conduct a quality appraisal of the included studies using standardised tools and extract data. If further information is needed, then study authors will be contacted. If appropriate, a random-effects meta-analysis will be conducted, with inverse probability weighting, to quantify differences in the mean difference in agreement between reported energy intake and measured energy expenditure between women and men, by self-report assessment method. Subgroup analyses will be conducted by participant factors, geographical factors and study quality. Ethics and dissemination All data used will be from published primary research studies or deidentified results provided at the discretion of any study authors that we contact. We will submit our findings to a peer-reviewed scientific journal and will disseminate results through presentations at international scientific conferences. PROSPERO registration number CRD42019131715
Exploring patient experiences and perspectives of a heart failure telerehabilitation program: a mixed methods approach
To describe patient experiences and perspectives of a group-based heart failure (HF) telerehabilitation program delivered to the homes via online video-conferencing.Limited information currently exists on patient experiences of telerehabilitation for HF. Patient feedback and end-user perspectives provide important information regarding the acceptability of this new delivery model which may have a substantial impact on future uptake.We used mixed-methods design with purposive sampling of patients with HF. We used self-report surveys and semi-structured interviews to measure patient experiences and perspectives following a 12-week telerehabilitation program. The telerehabilitation program encompassed group-based exercise and education, and were delivered in real-time via videoconferencing. Interviews were transcribed and coded, with thematic analysis undertaken.Seventeen participants with HF (mean age [SD] of 69 [12] years and 88% males) were recruited. Participants reported high visual clarity and ease of use for the monitoring equipment. Major themes included motivating and inhibiting influences related to telerehabilitation and improvement suggestions. Participants liked the health benefits, access to care and social support. Participants highlighted a need for improved audio clarity and connectivity as well computer training for those with limited computer experience. The majority of participants preferred a combined face-to-face and online delivery model.Participants in this study reported high visual clarity and ease-of-use, but provided suggestions for further improvements in group-based video telerehabilitation for HF
The Sloan Digital Sky Survey Reverberation Mapping Project: Technical Overview
The Sloan Digital Sky Survey Reverberation Mapping project (SDSS-RM) is a
dedicated multi-object RM experiment that has spectroscopically monitored a
sample of 849 broad-line quasars in a single 7 deg field with the SDSS-III
BOSS spectrograph. The RM quasar sample is flux-limited to i_psf=21.7 mag, and
covers a redshift range of 0.1<z<4.5. Optical spectroscopy was performed during
2014 Jan-Jul dark/grey time, with an average cadence of ~4 days, totaling more
than 30 epochs. Supporting photometric monitoring in the g and i bands was
conducted at multiple facilities including the CFHT and the Steward Observatory
Bok telescopes in 2014, with a cadence of ~2 days and covering all lunar
phases. The RM field (RA, DEC=14:14:49.00, +53:05:00.0) lies within the CFHT-LS
W3 field, and coincides with the Pan-STARRS 1 (PS1) Medium Deep Field MD07,
with three prior years of multi-band PS1 light curves. The SDSS-RM 6-month
baseline program aims to detect time lags between the quasar continuum and
broad line region (BLR) variability on timescales of up to several months (in
the observed frame) for ~10% of the sample, and to anchor the time baseline for
continued monitoring in the future to detect lags on longer timescales and at
higher redshift. SDSS-RM is the first major program to systematically explore
the potential of RM for broad-line quasars at z>0.3, and will investigate the
prospects of RM with all major broad lines covered in optical spectroscopy.
SDSS-RM will provide guidance on future multi-object RM campaigns on larger
scales, and is aiming to deliver more than tens of BLR lag detections for a
homogeneous sample of quasars. We describe the motivation, design and
implementation of this program, and outline the science impact expected from
the resulting data for RM and general quasar science.Comment: 25 pages, submitted to ApJS; project website at http://www.sdssrm.or
Effects of antiplatelet therapy on stroke risk by brain imaging features of intracerebral haemorrhage and cerebral small vessel diseases: subgroup analyses of the RESTART randomised, open-label trial
Background
Findings from the RESTART trial suggest that starting antiplatelet therapy might reduce the risk of recurrent symptomatic intracerebral haemorrhage compared with avoiding antiplatelet therapy. Brain imaging features of intracerebral haemorrhage and cerebral small vessel diseases (such as cerebral microbleeds) are associated with greater risks of recurrent intracerebral haemorrhage. We did subgroup analyses of the RESTART trial to explore whether these brain imaging features modify the effects of antiplatelet therapy
- …