932 research outputs found
Extrinsic Parameter Calibration for Line Scanning Cameras on Ground Vehicles with Navigation Systems Using a Calibration Pattern
Line scanning cameras, which capture only a single line of pixels, have been
increasingly used in ground based mobile or robotic platforms. In applications
where it is advantageous to directly georeference the camera data to world
coordinates, an accurate estimate of the camera's 6D pose is required. This
paper focuses on the common case where a mobile platform is equipped with a
rigidly mounted line scanning camera, whose pose is unknown, and a navigation
system providing vehicle body pose estimates. We propose a novel method that
estimates the camera's pose relative to the navigation system. The approach
involves imaging and manually labelling a calibration pattern with distinctly
identifiable points, triangulating these points from camera and navigation
system data and reprojecting them in order to compute a likelihood, which is
maximised to estimate the 6D camera pose. Additionally, a Markov Chain Monte
Carlo (MCMC) algorithm is used to estimate the uncertainty of the offset.
Tested on two different platforms, the method was able to estimate the pose to
within 0.06 m / 1.05 and 0.18 m / 2.39. We also propose
several approaches to displaying and interpreting the 6D results in a human
readable way.Comment: Published in MDPI Sensors, 30 October 201
ExoMol molecular line lists - XVII The rotation-vibration spectrum of hot SO
Sulphur trioxide (SO) is a trace species in the atmospheres of the Earth
and Venus, as well as well as being an industrial product and an environmental
pollutant. A variational line list for SO, named UYT2, is
presented containing 21 billion vibration-rotation transitions. UYT2 can be
used to model infrared spectra of SO at wavelengths longwards of 2 m
( cm) for temperatures up to 800 K. Infrared absorption
cross sections are also recorded at 300 and 500 C are used to validate the UYT2
line list. The intensities in UYT2 are scaled to match the measured cross
sections. The line list is made available in electronic form as supplementary
data to this article and at \url{www.exomol.com}.Comment: 15 pages, 10 figures, 9 tables MNRAS submitte
Nurses’ Knowledge and Attitudes toward Implementation of Electronic Medical Records
With the growth of Faith Community Nursing (FCN), one topic that needs further exploration is documentation. This includes the use of electronic medical records (EMRs). Nurses play a vital role in the planning and implementation of EMRs in the acute care setting and will also play a key role in Faith Community Nursing Programs that stand alone or partner with a health care agency. Individual computer expertise and/or attitude and knowledge of EMRs could be important in the successful implementation. Researchers utilized a modified version of the EMR questionnaire designed by Beiter and colleagues to examine nurses’ knowledge and attitudes regarding EMRs. Findings indicated as age increased, the level of experience regarding EMRs decreased. No difference was noted between the computer skills of RNs with an ADN and RNs with a BSN degree, but LPNs rated themselves as having higher computer skills than RNs. No statistical significance was noted regarding thoughts on saving time and reducing cost and other variables. Licensed practical nurses, more than RNs, indicated believing that EMRs have a positive effect on nurse-patient relationships. As implementation of EMRs occurs, plans for more training might be needed for certain groups of employees
Are Drivers of Root-Associated Fungal Community Structure Context Specific?
The composition and structure of plant-root-associated fungal communities are determined by local abiotic and biotic conditions. However, the relative influence and identity of relationships to abiotic and biotic factors may differ across environmental and ecological contexts, and fungal functional groups. Thus, understanding which aspects of root-associated fungal community ecology generalise across contexts is the first step towards a more predictive framework. We investigated how the relative importance of biotic and abiotic factors scale across environmental and ecological contexts using high-throughput sequencing (ca. 55 M Illumina metabarcoding sequences) of >260 plant-root-associated fungal communities from six UK salt marshes across two geographic regions (South-East and North-West England) in winter and summer. Levels of root-associated fungal diversity were comparable with forests and temperate grasslands, quadrupling previous estimates of salt-marsh fungal diversity. Whilst abiotic variables were generally most important, a range of site- and spatial scale-specific abiotic and biotic drivers of diversity and community composition were observed. Consequently, predictive models of diversity trained on one site, extrapolated poorly to others. Fungal taxa from the same functional groups responded similarly to the specific drivers of diversity and composition. Thus site, spatial scale and functional group are key factors that, if accounted for, may lead to a more predictive understanding of fungal community ecology
Experiences of hospice dementia care: A qualitative study of bereaved carers and hospice clinicians
BACKGROUND: Nearly 50 million people worldwide have dementia and the increasing numbers requiring end-of-life and palliative care, has led to national efforts to define standards of care for this patient group. Little research, however, has been done to date about the experience of hospice care for people with dementia accessing these services. This study explores the views of hospice dementia care for bereaved carers of people with dementia and hospice clinicians. METHODS: We used purposive sampling for participant recruitment. Semi-structured qualitative interviews were conducted with bereaved carers and hospice clinical staff. Interviews were audio recorded and the transcriptions were analysed through thematic analysis. A total of 12 participants were interviewed from one service in the Northwest region in the UK. All were female and white British. RESULTS: Participants described their experience of hospice dementia care in three main themes: Pre-access to service, roles and responsibility within hospice care, ease and difficulty of last period of end-of-life care. CONCLUSION: Rapid response teams delivering hospice home care could represent a better option to inpatient care and may be preferred by patients. This type of service, however, may require joined-up care with other community services, and this type of care needs to be considered and planned. Future studies should evaluate this type of community care
ExoMol molecular line lists - XIV. The rotation-vibration spectrum of hot SO<sub>2</sub>
Sulphur dioxide is well-known in the atmospheres of planets and satellites,
where its presence is often associated with volcanism, and in circumstellar
envelopes of young and evolved stars as well as the interstellar medium. This
work presents a line list of 1.3 billion SO
vibration-rotation transitions computed using an empirically-adjusted potential
energy surface and an ab initio dipole moment surface. The list gives complete
coverage up to 8000 cm (wavelengths longer than 1.25 m) for
temperatures below 2000 K. Infrared absorption cross sections are recorded at
300 and 500 C are used to validated the resulting ExoAmes line list. The line
list is made available in electronic form as supplementary data to this article
and at www.exomol.com.Comment: Submitted to MNRA
Uncovering Expertise-Related Differences in Troubleshooting Performance: Combining Eye Movement and Concurrent Verbal Protocol Data
This study explored the value of eye movement data for uncovering relatively small expertise-related differences in electrical circuit-troubleshooting performance, and describes that value in relation to concurrent verbal protocols. Results show that in the ‘problem orientation’ phase, higher expertise participants spent relatively more time, had a shorter mean fixation duration, and fixated more on a major fault-related component than lower expertise participants. In the ‘problem formulation’ part of the ‘problem formulation and action decision’ phase, the mean fixation duration of the higher expertise participants was longer. In the ‘action evaluation and next action decision’ phase, higher expertise participants spent relatively more time than the lower expertise participants. Over the different phases, only the mean fixation duration of the higher expertise participants differed significantly. The relation between the eye movement and concurrent verbal protocol data is qualitatively described. The results are discussed in perspective of the combined value of eye tracking and concurrent reports for expertise research and instructional design
The Impact of Bullying Perpetration and Victimization on Later Violence and Psychological Distress:A Study of Resilience amongst a Scottish Youth Cohort
Association of Upper Gastrointestinal Surgery of Great Britain and Ireland (AUGIS)/Perioperative Quality Initiative (POQI) consensus statement on intraoperative and postoperative interventions to reduce pulmonary complications after oesophagectomy
BACKGROUND: Pulmonary complications are the most common morbidity after oesophagectomy, contributing to mortality and prolonged postoperative recovery, and have a negative impact on health-related quality of life. A variety of single or bundled interventions in the perioperative setting have been developed to reduce the incidence of pulmonary complications. Significant variation in practice exists across the UK. The aim of this modified Delphi consensus was to deliver clear evidence-based consensus recommendations regarding intraoperative and postoperative care that may reduce pulmonary complications after oesophagectomy. METHODS: With input from a multidisciplinary group of 23 experts in the perioperative management of patients undergoing surgery for oesophageal cancer, a modified Delphi method was employed. Following an initial systematic review of relevant literature, a range of anaesthetic, surgical, and postoperative care interventions were identified. These were then discussed during a two-part virtual conference. Recommendation statements were drafted, refined, and agreed by all attendees. The level of evidence supporting each statement was considered. RESULTS: Consensus was reached on 12 statements on topics including operative approach, pyloric drainage strategies, intraoperative fluid and ventilation strategies, perioperative analgesia, postoperative feeding plans, and physiotherapy interventions. Seven additional questions concerning the perioperative management of patients undergoing oesophagectomy were highlighted to guide future research. CONCLUSION: Clear consensus recommendations regarding intraoperative and postoperative interventions that may reduce pulmonary complications after oesophagectomy are presented
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