21 results
Insiders/outsiders of Canadian disability arts
- Part of
- Eliza Chandler, Sean Lee, Lisa East, Megan Johnson
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- Journal:
- Epidemiology and Psychiatric Sciences / Volume 32 / 2023
- Published online by Cambridge University Press:
- 19 July 2023, e47
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23 - Wolf–Beaver Dynamics in the Greater Voyageurs Ecosystem, Minnesota
- Edited by Ian Convery, University of Cumbria, Owen T. Nevin, Central Queensland University and University of Cumbria, Erwin van Maanen, Peter Davis, Newcastle University, Karen Lloyd, Lancaster University
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- Book:
- The Wolf
- Published by:
- Boydell & Brewer
- Published online:
- 10 January 2024
- Print publication:
- 18 July 2023, pp 259-272
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Summary
In the heart of the boreal forest in 1949, trappers gathered at a spring meeting in Wabowden, Manitoba, to discuss many items of business, including wolf predation on beavers. Recent debate and disagreement had broken out among the trappers regarding whether wolves actually killed beavers. One trapper stated wolves ‘harassed’ a beaver colony so extensively that he had to fell trees into the water to ensure the colony's survival. Some trappers remained sceptical and unconvinced. The debate was put to a lively and emphatic end when a trapper walked into the spring meeting and presented a bushel sack stuffed with wolf scats containing beaver fur (Nash 1951). The proof was in the poop!
Surprisingly, our understanding of wolf predation on beavers has progressed relatively little since 1949. Most attempts to study wolf predation on beavers followed an approach akin to the Manitoba trappers: collecting and examining wolf scats. By doing this, researchers in many areas across North America and Eurasia concluded, like the trappers, that beavers were important prey for wolves during the ice-free season. However, wolf–beaver dynamics received little attention beyond this, largely because (1) most wolf predation research was focused on wolf–ungulate interactions and predation on smaller alternate prey was not a priority (Gable et al 2018c), and (2) rigorously studying wolf predation during spring to autumn in forested ecosystems with dense vegetation was a monumental, and often impossible, task prior to GPS collar technology. Of course, many researchers and biologists had interesting ideas or hypotheses about wolf–beaver interactions, but most were based on anecdotal observations, indirect evidence or conjecture (Gable et al 2018c). None the less, these ideas were compelling and relevant. Some suggested dense beaver populations increased wolf pup survival (Benson et al 2013) and, in turn, wolf pack and population size (Andersone 1999; Barber-Meyer et al 2016). Others posited that dense beaver populations reduced wolf predation on ungulate prey (Forbes and Theberge 1996) while some claimed it increased predation (Andersone and Ozoliņš 2004; Latham et al 2013). Still others suspected wolves changed ecosystems by altering the ecosystem engineering behaviour of beavers (Peterson et al 2014). Clearly, wolf–beaver dynamics needed to be studied in more detail.
Co-developed implementation guidelines to maximize acceptability, feasibility, and usability of mobile phone supervision in Kenya
- Noah S. Triplett, Anne Mbwayo, Sharon Kiche, Lucy Liu, Jacinto Silva, Rashed AlRasheed, Clara Johnson, Cyrilla Amanya, Sean Munson, Bryan J. Weiner, Pamela Y. Collins, Shannon Dorsey
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- Journal:
- Cambridge Prisms: Global Mental Health / Volume 10 / 2023
- Published online by Cambridge University Press:
- 23 May 2023, e31
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Opportunities exist to leverage mobile phones to replace or supplement in-person supervision of lay counselors. However, contextual variables, such as network connectivity and provider preferences, must be considered. Using an iterative and mixed methods approach, we co-developed implementation guidelines to support the implementation of mobile phone supervision with lay counselors and supervisors delivering a culturally adapted trauma-focused cognitive behavioral therapy in Western Kenya. Guidelines were shared and discussed with lay counselors in educational outreach visits led by supervisors. We evaluated the impact of guidelines and outreach on the acceptability, feasibility, and usability of mobile phone supervision. Guidelines were associated with significant improvements in acceptability and usability of mobile phone supervision. There was no evidence of a significant difference in feasibility. Qualitative interviews with lay counselors and supervisors contextualized how guidelines impacted acceptability and feasibility – by setting expectations for mobile phone supervision, emphasizing importance, increasing comfort, and sharing strategies to improve mobile phone supervision. Introducing and discussing co-developed implementation guidelines significantly improved the acceptability and usability of mobile phone supervision. This approach may provide a flexible and scalable model to address challenges with implementing evidence-based practices and implementation strategies in lower-resourced areas.
New exact Betchov-like relation for the helicity flux in homogeneous turbulence
- Damiano Capocci, Perry L. Johnson, Sean Oughton, Luca Biferale, Moritz Linkmann
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- Journal:
- Journal of Fluid Mechanics / Volume 963 / 25 May 2023
- Published online by Cambridge University Press:
- 11 May 2023, R1
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In homogeneous and isotropic turbulence, the relative contributions of different physical mechanisms to the energy cascade can be quantified by an exact decomposition of the energy flux (Johnson, Phys. Rev. Lett., vol. 124, 2020, 104501; J. Fluid Mech., vol. 922, 2021, A3). We extend the formalism to the transfer of kinetic helicity across scales, important in the presence of large-scale mirror‐breaking mechanisms, to identify physical processes resulting in helicity transfer and quantify their contributions to the mean flux in the inertial range. All subfluxes transfer helicity from large to small scales. Approximately 50 % of the mean flux is due to the scale-local vortex flattening and vortex twisting. We derive a new exact relation between these effects, similar to the Betchov relation for the energy flux, revealing that the mean contribution of the former is three times larger than that of the latter. Multi-scale effects account for the remaining 50 % of the mean flux, with approximate equipartition between multi-scale vortex flattening, twisting and entangling.
Evaluating automated electronic case report form data entry from electronic health records
- Alex C. Cheng, Mary K. Banasiewicz, Jakea D. Johnson, Lina Sulieman, Nan Kennedy, Francesco Delacqua, Adam A. Lewis, Meghan M. Joly, Amanda J. Bistran-Hall, Sean Collins, Wesley H. Self, Matthew S. Shotwell, Christopher J. Lindsell, Paul A. Harris
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- Journal:
- Journal of Clinical and Translational Science / Volume 7 / Issue 1 / 2023
- Published online by Cambridge University Press:
- 14 December 2022, e29
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Background:
Many clinical trials leverage real-world data. Typically, these data are manually abstracted from electronic health records (EHRs) and entered into electronic case report forms (CRFs), a time and labor-intensive process that is also error-prone and may miss information. Automated transfer of data from EHRs to eCRFs has the potential to reduce data abstraction and entry burden as well as improve data quality and safety.
Methods:We conducted a test of automated EHR-to-CRF data transfer for 40 participants in a clinical trial of hospitalized COVID-19 patients. We determined which coordinator-entered data could be automated from the EHR (coverage), and the frequency with which the values from the automated EHR feed and values entered by study personnel for the actual study matched exactly (concordance).
Results:The automated EHR feed populated 10,081/11,952 (84%) coordinator-completed values. For fields where both the automation and study personnel provided data, the values matched exactly 89% of the time. Highest concordance was for daily lab results (94%), which also required the most personnel resources (30 minutes per participant). In a detailed analysis of 196 instances where personnel and automation entered values differed, both a study coordinator and a data analyst agreed that 152 (78%) instances were a result of data entry error.
Conclusions:An automated EHR feed has the potential to significantly decrease study personnel effort while improving the accuracy of CRF data.
Establishing a National Emergency Medical Team (EMT) in the Federated States of Micronesia (FSM)
- Sean T. Casey, Moses E. Pretrick, Eliaser Johnson, Joanes Sarofalpiy, Mayson Fredrick, Momoe Takeuchi
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- Journal:
- Prehospital and Disaster Medicine / Volume 37 / Issue S2 / November 2022
- Published online by Cambridge University Press:
- 22 November 2022, p. s107
- Print publication:
- November 2022
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Background/Introduction:
The Federated States of Micronesia (FSM) is a Pacific Island nation of just over 100,000 people, with 607 islands spread over an ocean territory of over 2.5 million square kilometers. The nation is regularly struck by disasters and outbreaks - most recently Typhoons Wutip and Maysak, which affected populations on hundreds of islands. To strengthen rapid response to future emergencies, the FSM Government, with support from WHO, Japan, and USAID, is now developing a national Emergency Medical Team.1
Objectives:To describe the development of FSM’s national EMT.
Method/Description:FSM’s EMT development began with a workshop facilitated by WHO in November 2019, with participants from the National Department of Health & Social Affairs (DHSA) and representatives from all four of FSM’s State Health Departments. A national EMT focal point was jointly hired by WHO and FSM’s DHSA, a Technical Working Group was established, and SOPs developed. WHO initiated procurement of a tailored Pacific EMT cache for FSM’s EMT, along with other Pacific EMTs. FSM’s EMT development has been slowed by COVID-19, but there are plans to train team members from the country’s four States to be ready for self-sufficient national deployments by early 2023.
Results/Outcomes:With support from partners, FSM is developing a self-sufficient national EMT capable of rapid response across hundreds of islands spread over a vast ocean territory.
Conclusion:FSM is strengthening readiness for future emergencies by developing a national EMT capable of rapid response to the most remote and austere post-disaster conditions, including throughout its remote outer islands.
Practice Variation between Salaried and Fee-for-Service Surgeons for Lumbar Surgery
- Daniel Banaszek, Greg McIntosh, Raphaële Charest-Morin, Edward Abraham, Neil Manson, Michael G. Johnson, Christopher S. Bailey, Y Raja Rampersaud, R Andrew Glennie, Jerome Paquet, Andrew Nataraj, Michael H. Weber, Sean Christie, Najmedden Attabib, Alex Soroceanu, Adrienne Kelly, Hamilton Hall, Ken Thomas, Charles Fisher, Nicolas Dea
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- Journal:
- Canadian Journal of Neurological Sciences / Volume 50 / Issue 4 / July 2023
- Published online by Cambridge University Press:
- 16 June 2022, pp. 604-611
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Objective:
To examine differences in surgical practices between salaried and fee-for-service (FFS) surgeons for two common degenerative spine conditions. Surgeons may offer different treatments for similar conditions on the basis of their compensation mechanism.
Methods:The study assessed the practices of 63 spine surgeons across eight Canadian provinces (39 FFS surgeons and 24 salaried) who performed surgery for two lumbar conditions: stable spinal stenosis and degenerative spondylolisthesis. The study included a multicenter, ambispective review of consecutive spine surgery patients enrolled in the Canadian Spine Outcomes and Research Network registry between October 2012 and July 2018. The primary outcome was the difference in type of procedures performed between the two groups. Secondary study variables included surgical characteristics, baseline patient factors, and patient-reported outcome.
Results:For stable spinal stenosis (n = 2234), salaried surgeons performed statistically fewer uninstrumented fusion (p < 0.05) than FFS surgeons. For degenerative spondylolisthesis (n = 1292), salaried surgeons performed significantly more instrumentation plus interbody fusions (p < 0.05). There were no statistical differences in patient-reported outcomes between the two groups.
Conclusions:Surgeon compensation was associated with different approaches to stable lumbar spinal stenosis and degenerative lumbar spondylolisthesis. Salaried surgeons chose a more conservative approach to spinal stenosis and a more aggressive approach to degenerative spondylolisthesis, which highlights that remuneration is likely a minor determinant in the differences in practice of spinal surgery in Canada. Further research is needed to further elucidate which variables, other than patient demographics and financial incentives, influence surgical decision-making.
19 - Statistical Considerations in the Design and Analysis of Alzheimer’s Disease Clinical Trials
- from Section 3 - Alzheimer’s Disease Clinical Trials
- Edited by Jeffrey Cummings, University of Nevada, Las Vegas, Jefferson Kinney, University of Nevada, Las Vegas, Howard Fillit
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- Book:
- Alzheimer's Disease Drug Development
- Published online:
- 03 March 2022
- Print publication:
- 31 March 2022, pp 232-248
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Summary
Statistical issues are prominent in Alzheimer’s disease (AD) clinical trials due to the enormous challenges in this disease. The complexity of the disease and intervention pathways challenge drug discovery efforts, but measurement and analysis complexities and subjective outcomes also interfere with successful drug development. Variability across disease stage, disease sub-types, comorbidities and concomitant treatments (between-subject), and non-equivalent forms, good and bad days, and rater inconsistencies (within-subject) increase the chance of failure. AD-specific statistical expertise is critical for success, in contrast to most disease areas that require less disease-specific statistical knowledge. Use of global statistical tests and composites, correcting for covariates, and model selection increase the chance of a clearly positive outcome for active treatments and a clearly negative outcome for inactive or harmful treatments.
Direct Observation of PFIB-Induced Clustering in Precipitation-Strengthened Al Alloys by Atom Probe Tomography
- David Tweddle, Jonathan A. Johnson, M. Kapoor, Sean Mileski, John E. Carsley, Gregory B. Thompson
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- Journal:
- Microscopy and Microanalysis / Volume 28 / Issue 2 / April 2022
- Published online by Cambridge University Press:
- 24 January 2022, pp. 296-301
- Print publication:
- April 2022
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The effect of sample preparation on a pre-aged Al–Mg–Si–Cu alloy has been evaluated using atom probe tomography. Three methods of preparation were investigated: electropolishing (control), Ga+ focused ion beam (FIB) milling, and Xe+ plasma FIB (PFIB) milling. Ga+-based FIB preparation was shown to introduce significant amount of Ga contamination throughout the reconstructed sample (≈1.3 at%), while no Xe contamination was detected in the PFIB-prepared sample. Nevertheless, a significantly higher cluster density was observed in the Xe+ PFIB-prepared sample (≈25.0 × 1023 m−3) as compared to the traditionally produced electropolished sample (≈3.2 × 1023 m−3) and the Ga+ FIB sample (≈5.6 × 1023 m−3). Hence, the absence of the ion milling species does not necessarily mean an absence of specimen preparation defects. Specifically, the FIB and PFIB-prepared samples had more Si-rich clusters as compared to electropolished samples, which is indicative of vacancy stabilization via solute clustering.
Characterising As–Bi–Co–Cu-bearing minerals at Scar Crags and Dale Head North, Lake District, UK
- Giulio F.D. Solferino, Nathan T. Westwood, Adam Eskdale, Sean C. Johnson
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- Journal:
- Mineralogical Magazine / Volume 85 / Issue 2 / April 2021
- Published online by Cambridge University Press:
- 10 March 2021, pp. 197-214
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Scar Crags and Dale Head North in the English Lake District host mineralised veins enriched in ‘Energy Critical Elements’ (ECEs) specifically, bismuth, cobalt and copper. A limited number of studies in the 1970s investigated the mineralogy and inferred the genesis of these veins as being related to the intrusion of the Lake District batholith.
This study investigates the geology, mineralogy, composition and paragenesis of these two mineralised areas. The results highlight the ubiquitous presence of Co–Fe–Ni-sulfarsenides in both deposits and the presence of some mineral species, hitherto unreported. Scar Crags samples contained high concentrations of cobalt, commonly present within arsenopyrite, whereas cobalt is of minor importance at Dale Head North, where copper and arsenic are the primary metals. A sequence of events, with As–Co–Ni-bearing fluids infilling the veins after an initial stage of quartz and chlorite precipitation is the most striking resemblance between the two mineralised systems, potentially indicating a common process for Co-rich vein-type deposits in the area. If so, understanding such processes could prove vital in aiding exploration in other terranes.
A Self-Reflection Stewardship Workshop Improves Resident Physician Understanding of Ambulatory Antibiotic Stewardship
- Julio Nasim, Christopher Ohl, Sean Hernandez, John Williamson, James Beardsley, James Johnson, Werner Bischoff, Tyler Stone, Vera Luther
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- Journal:
- Infection Control & Hospital Epidemiology / Volume 41 / Issue S1 / October 2020
- Published online by Cambridge University Press:
- 02 November 2020, p. s103
- Print publication:
- October 2020
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Background: Antibiotic stewardship programs (ASPs) have traditionally focused on inpatient prescribing, but they are now mandated to involve ambulatory settings. We developed and tested an educational tool in resident physicians to empower outpatient providers to perform self-reflection stewardship (SRS) to improve their antibiotic use. Results of the first SRS workshop are reported. Methods: A 90-minute SRS workshop focusing on the evaluation and management of sinusitis in ambulatory care was developed for PGY 2-3 internal medicine residents. Participants received a 15-minute didactic on the evaluation and management of adults with sinusitis, including typical microbiology, differentiation of bacterial sinusitis, and guideline recommendations on antibiotic treatment. In a computer lab, participants were instructed how to review charts of patients they had treated with antibiotics for sinusitis during the past year using the SlicerDicer application in Epic. Over 1 hour, they worked in pairs to complete and discuss a self-reflection inventory for 5 patients from each of their respective reviews. They evaluated pertinent history, comorbidities, presenting symptoms and signs, diagnostic testing performed, and a self-assessment of the subsequent antibiotic prescribing, including appropriateness of using an antibiotic, antibiotic choice and duration. In addition, they reflected on potential patient and prescriber challenges. Residents then identified common themes and developed a personal improvement plan for antibiotic prescribing for sinusitis. The last 15 minutes were spent debriefing with ASP faculty on reasons for overprescription of antibiotics for URIs and individual improvement plans. Residents completed workshop evaluations using a Likert scale and open-ended comments. Results: In total, 26 residents participated. All (100%) agreed or strongly agreed that the SRS workshop improved their understanding of how to obtain data on their own practice habits. Moreover, 23 (88%) agreed or strongly agreed that the workshop improved their understanding of when to prescribe antibiotics and how to practice antibiotic stewardship in the outpatient setting. Also, 20 participants (77%) agreed or strongly agreed that the SRS workshop helped them gain insight into reasons why they might overprescribe antibiotics in the outpatient setting. Furthermore, 25 (96%) agreed or strongly agreed that the SRS workshop helped them identify at least 1 way they could improve their antibiotic prescribing in the outpatient setting. Conclusions: The SRS workshop was well received by residents and offers a tool to empower primary care resident physicians to access their own antibiotic prescribing data, perform a structured self-reflection, and enhance their understanding of antibiotic stewardship in the ambulatory setting. SRS is a potential tool to improve ambulatory antibiotic use.
Disclosures: None
Funding: None
Moshpit Medicine: The Experience of an Australian Event Resuscitation Team
- Sean Wing, Robert Johnson, Leigh Fowler
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- Journal:
- Prehospital and Disaster Medicine / Volume 35 / Issue 3 / June 2020
- Published online by Cambridge University Press:
- 04 March 2020, pp. 293-297
- Print publication:
- June 2020
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The authors reviewed case reports of patients presenting to an advanced medical assessment and resuscitation service at 15 music events over 22 days from June 2018 through March 2019 around Australia. Event size ranged from 4,000 to 57,500 participants. Events observed had a mean patient presentation rate (PPR) of 0.83% (SD = 0.59%) and mean transport to hospital rate (TTHR) of 1.89 (SD = 0.92) per 10,000. Two-hundred and twenty-one cases were reviewed and tabulated for descriptive analysis.
Lower rates of traumatic injuries were seen compared to other case reports, and minor procedures represented a minor but important part of the team’s workload. Methylenedioxymethamphetamine (MDMA) use was reported by 33.0% of patients on the day of presentation; almost one-half of these reported a co-ingestion. Patients presenting after using MDMA were more likely to have an elevated temperature. Eight percent of patients presented with temperature above 38°C. Patients with an initial temperature above 38°C were more likely to require hospitalization. On-site electrocardiograph (ECG), blood gas, ultrasound, and urinalysis were found to be useful in decision support. In total, 29.8% of patients required sedation during their encounter; 2.7% required rapid sequence induction at the event. Mean observation time was 44 minutes, with longer observation required in MDMA and hallucinogen-related presentations.
VP96 Activities To Optimize Quality And Efficiency Of Medicines In Scotland
- Brian Godman, Amanj Kurdi, Holly McCabe, Sean MacBride-Stewart, Chris Johnson, Simon Hurding, Marion Bennie, Alec Morton
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- Journal:
- International Journal of Technology Assessment in Health Care / Volume 35 / Issue S1 / 2019
- Published online by Cambridge University Press:
- 31 December 2019, p. 96
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Introduction
The growing prevalence of non-communicable diseases, combined with greater recognition of the effectiveness of lipid lowering agents (LLAs), has fuelled their increasing use in recent years. Similarly, increasing recognition of mental health and, arguably, societal expectations and pressures, has driven appreciable growth in antidepressant prescribing in recent years. Concurrent with this, growing resource pressures enhanced by the continual launch of new premium priced medicines necessitates reforms and initiatives within finite budgets. Scotland has introduced multiple measures in recent years to improve both the quality and efficiency of prescribing. There is a need to document these initiatives and outcomes to provide future direction.
MethodsAssessment of the utilization (items dispensed) and expenditure of key LLAs (mainly statins) and SSRIs between 2001 and 2017 in Scotland alongside initiatives.
ResultsMultiple interventions have increased international non-proprietary name (INN) prescribing (99% for statins and up to 99.9% for SSRIs). They have also increased preferential prescribing of generic versus patented statins with low costs for generics, reduced inappropriate prescribing of ezetimibe due to effectiveness concerns, and increased the prescribing of higher dose statins (71% in 2015). These measures have resulted in a 50% reduction in LLA expenditure between 2001 and 2015 despite a 412% increase in utilization. Initiatives to reduce the prescribing of escitalopram as lack of evidence demonstrating cost-benefits over generic citalopram, along with high INN prescribing, achieved a 73.7% reduction in SSRI expenditure between 2001 and 2017 despite a 2.34-fold increase in utilisation. Concerns with paroxetine, and more recently citalopram and escitalopram following safety warnings, resulted in a considerable reduction in their use alongside a significant increase in sertraline.
ConclusionsGeneric availability coupled with multiple measures has resulted in appreciable shifts in statin and SSRI prescribing behavior and reduced ezetimibe prescribing, resulting in improvements in both the quality and efficiency of prescribing to provide future direction.
Consultation and Surgical Wait Times in Cervical Spondylotic Myelopathy
- Babak Sharifi, Greg McIntosh, Charles Fisher, W. Bradley Jacobs, Michael Johnson, Christopher S. Bailey, Sean Christie, Raphaële Charest-Morin, Jérome Paquet, Andrew Nataraj, David Cadotte, Neil Manson, Hamilton Hall, Kenneth C. Thomas, Y. Raja Rampersaud, Nicolas Dea
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- Journal:
- Canadian Journal of Neurological Sciences / Volume 46 / Issue 4 / July 2019
- Published online by Cambridge University Press:
- 03 May 2019, pp. 430-435
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Background: Cervical spondylotic myelopathy (CSM) is the leading cause of spinal cord impairment. In a public healthcare system, wait times to see spine specialists and eventually access surgical treatment for CSM can be substantial. The goals of this study were to determine consultation wait times (CWT) and surgical wait times (SWT), and identify predictors of wait time length. Methods: Consecutive patients enrolled in the Canadian Spine Outcomes and Research Network (CSORN) prospective and observational CSM study from March 2015 to July 2017 were included. A data-splitting technique was used to develop and internally validate multivariable models of potential predictors. Results: A CSORN query returned 264 CSM patients for CWT. The median was 46 days. There were 31% mild, 35% moderate, and 33% severe CSM. There was a statistically significant difference in median CWT between moderate and severe groups; 207 patients underwent surgical treatment. Median SWT was 42 days. There was a statistically significant difference in SWT between mild/moderate and severe groups. Short symptom duration, less pain, lower BMI, and lower physical component score of SF-12 were predictive of shorter CWT. Only baseline pain and medication duration were predictive of SWT. Both CWT and SWT were shorter compared to a concurrent cohort of lumbar stenosis patients (p <0.001). Conclusions: Patients with shorter duration (either symptoms or medication) and less neck pain waited less to see a spine specialist in Canada and to undergo surgical treatment. This study highlights some of the obstacles to overcome in expedited care for this patient population.
Precise Near-Infrared Radial Velocities
- Peter Plavchan, Peter Gao, Jonathan Gagne, Elise Furlan, Carolyn Brinkworth, Michael Bottom, Angelle Tanner, Guillem Anglada-Escude, Russel White, Cassy Davison, Sean Mills, Chas Beichman, John Asher Johnson, David Ciardi, Kent Wallace, Bertrand Mennesson, Gautam Vasisht, Lisa Prato, Stephen Kane, Sam Crawford, Tim Crawford, Keeyoon Sung, Brian Drouin, Sean Lin, Stephanie Leifer, Joe Catanzarite, Todd Henry, Kaspar von Braun, Bernie Walp, Claire Geneser, Nick Ogden, Andrew Stufflebeam, Garrett Pohl, Joe Regan
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- Journal:
- Proceedings of the International Astronomical Union / Volume 10 / Issue S314 / November 2015
- Published online by Cambridge University Press:
- 27 January 2016, pp. 286-287
- Print publication:
- November 2015
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We present the results of two 2.3 μm near-infrared (NIR) radial velocity (RV) surveys to detect exoplanets around 36 nearby and young M dwarfs. We use the CSHELL spectrograph (R ~ 46,000) at the NASA InfraRed Telescope Facility (IRTF), combined with an isotopic methane absorption gas cell for common optical path relative wavelength calibration. We have developed a sophisticated RV forward modeling code that accounts for fringing and other instrumental artifacts present in the spectra. With a spectral grasp of only 5 nm, we are able to reach long-term radial velocity dispersions of ~20–30 m s−1 on our survey targets.
The optical photometric and spectroscopic investigation of Type IIP supernova 2012A
- Rupak Roy, Firoza Sutaria, Subhash Bose, Sean Johnson, Vikram Dwarkadas, Brian York, Brijesh Kumar, Brajesh Kumar, Vijay K. Bhatt, Sayan Chakraborti, Don York, Adam Ritchey, Gabrielle Saurage, Mary Beth Kaiser
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- Journal:
- Proceedings of the International Astronomical Union / Volume 9 / Issue S296 / January 2013
- Published online by Cambridge University Press:
- 29 January 2014, pp. 116-120
- Print publication:
- January 2013
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Supernova 2012A was discovered on 7.39UT, January, 2012 in the nearby galaxy NGC 3239 at an unfiltered magnitude of 14.6 and classified spectroscopically as a Type IIP event. Here, we present the optical photometric and spectroscopic follow-up of the event during 14d to 130d post explosion.
Contributors
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- By Rose Teteki Abbey, K. C. Abraham, David Tuesday Adamo, LeRoy H. Aden, Efrain Agosto, Victor Aguilan, Gillian T. W. Ahlgren, Charanjit Kaur AjitSingh, Dorothy B E A Akoto, Giuseppe Alberigo, Daniel E. Albrecht, Ruth Albrecht, Daniel O. Aleshire, Urs Altermatt, Anand Amaladass, Michael Amaladoss, James N. Amanze, Lesley G. Anderson, Thomas C. Anderson, Victor Anderson, Hope S. Antone, María Pilar Aquino, Paula Arai, Victorio Araya Guillén, S. Wesley Ariarajah, Ellen T. Armour, Brett Gregory Armstrong, Atsuhiro Asano, Naim Stifan Ateek, Mahmoud Ayoub, John Alembillah Azumah, Mercedes L. García Bachmann, Irena Backus, J. Wayne Baker, Mieke Bal, Lewis V. Baldwin, William Barbieri, António Barbosa da Silva, David Basinger, Bolaji Olukemi Bateye, Oswald Bayer, Daniel H. Bays, Rosalie Beck, Nancy Elizabeth Bedford, Guy-Thomas Bedouelle, Chorbishop Seely Beggiani, Wolfgang Behringer, Christopher M. Bellitto, Byard Bennett, Harold V. Bennett, Teresa Berger, Miguel A. Bernad, Henley Bernard, Alan E. Bernstein, Jon L. Berquist, Johannes Beutler, Ana María Bidegain, Matthew P. Binkewicz, Jennifer Bird, Joseph Blenkinsopp, Dmytro Bondarenko, Paulo Bonfatti, Riet en Pim Bons-Storm, Jessica A. Boon, Marcus J. Borg, Mark Bosco, Peter C. Bouteneff, François Bovon, William D. Bowman, Paul S. Boyer, David Brakke, Richard E. Brantley, Marcus Braybrooke, Ian Breward, Ênio José da Costa Brito, Jewel Spears Brooker, Johannes Brosseder, Nicholas Canfield Read Brown, Robert F. Brown, Pamela K. Brubaker, Walter Brueggemann, Bishop Colin O. Buchanan, Stanley M. Burgess, Amy Nelson Burnett, J. Patout Burns, David B. Burrell, David Buttrick, James P. Byrd, Lavinia Byrne, Gerado Caetano, Marcos Caldas, Alkiviadis Calivas, William J. Callahan, Salvatore Calomino, Euan K. Cameron, William S. Campbell, Marcelo Ayres Camurça, Daniel F. Caner, Paul E. Capetz, Carlos F. Cardoza-Orlandi, Patrick W. Carey, Barbara Carvill, Hal Cauthron, Subhadra Mitra Channa, Mark D. Chapman, James H. Charlesworth, Kenneth R. Chase, Chen Zemin, Luciano Chianeque, Philip Chia Phin Yin, Francisca H. Chimhanda, Daniel Chiquete, John T. Chirban, Soobin Choi, Robert Choquette, Mita Choudhury, Gerald Christianson, John Chryssavgis, Sejong Chun, Esther Chung-Kim, Charles M. A. Clark, Elizabeth A. Clark, Sathianathan Clarke, Fred Cloud, John B. Cobb, W. Owen Cole, John A Coleman, John J. Collins, Sylvia Collins-Mayo, Paul K. Conkin, Beth A. Conklin, Sean Connolly, Demetrios J. Constantelos, Michael A. Conway, Paula M. Cooey, Austin Cooper, Michael L. Cooper-White, Pamela Cooper-White, L. William Countryman, Sérgio Coutinho, Pamela Couture, Shannon Craigo-Snell, James L. Crenshaw, David Crowner, Humberto Horacio Cucchetti, Lawrence S. Cunningham, Elizabeth Mason Currier, Emmanuel Cutrone, Mary L. Daniel, David D. Daniels, Robert Darden, Rolf Darge, Isaiah Dau, Jeffry C. Davis, Jane Dawson, Valentin Dedji, John W. de Gruchy, Paul DeHart, Wendy J. Deichmann Edwards, Miguel A. De La Torre, George E. Demacopoulos, Thomas de Mayo, Leah DeVun, Beatriz de Vasconcellos Dias, Dennis C. Dickerson, John M. Dillon, Luis Miguel Donatello, Igor Dorfmann-Lazarev, Susanna Drake, Jonathan A. Draper, N. Dreher Martin, Otto Dreydoppel, Angelyn Dries, A. J. Droge, Francis X. D'Sa, Marilyn Dunn, Nicole Wilkinson Duran, Rifaat Ebied, Mark J. Edwards, William H. Edwards, Leonard H. Ehrlich, Nancy L. Eiesland, Martin Elbel, J. Harold Ellens, Stephen Ellingson, Marvin M. Ellison, Robert Ellsberg, Jean Bethke Elshtain, Eldon Jay Epp, Peter C. Erb, Tassilo Erhardt, Maria Erling, Noel Leo Erskine, Gillian R. Evans, Virginia Fabella, Michael A. Fahey, Edward Farley, Margaret A. Farley, Wendy Farley, Robert Fastiggi, Seena Fazel, Duncan S. Ferguson, Helwar Figueroa, Paul Corby Finney, Kyriaki Karidoyanes FitzGerald, Thomas E. FitzGerald, John R. Fitzmier, Marie Therese Flanagan, Sabina Flanagan, Claude Flipo, Ronald B. Flowers, Carole Fontaine, David Ford, Mary Ford, Stephanie A. Ford, Jim Forest, William Franke, Robert M. Franklin, Ruth Franzén, Edward H. Friedman, Samuel Frouisou, Lorelei F. Fuchs, Jojo M. Fung, Inger Furseth, Richard R. Gaillardetz, Brandon Gallaher, China Galland, Mark Galli, Ismael García, Tharscisse Gatwa, Jean-Marie Gaudeul, Luis María Gavilanes del Castillo, Pavel L. Gavrilyuk, Volney P. Gay, Metropolitan Athanasios Geevargis, Kondothra M. George, Mary Gerhart, Simon Gikandi, Maurice Gilbert, Michael J. Gillgannon, Verónica Giménez Beliveau, Terryl Givens, Beth Glazier-McDonald, Philip Gleason, Menghun Goh, Brian Golding, Bishop Hilario M. Gomez, Michelle A. Gonzalez, Donald K. Gorrell, Roy Gottfried, Tamara Grdzelidze, Joel B. Green, Niels Henrik Gregersen, Cristina Grenholm, Herbert Griffiths, Eric W. Gritsch, Erich S. Gruen, Christoffer H. Grundmann, Paul H. Gundani, Jon P. Gunnemann, Petre Guran, Vidar L. Haanes, Jeremiah M. Hackett, Getatchew Haile, Douglas John Hall, Nicholas Hammond, Daphne Hampson, Jehu J. Hanciles, Barry Hankins, Jennifer Haraguchi, Stanley S. Harakas, Anthony John Harding, Conrad L. Harkins, J. William Harmless, Marjory Harper, Amir Harrak, Joel F. Harrington, Mark W. Harris, Susan Ashbrook Harvey, Van A. Harvey, R. Chris Hassel, Jione Havea, Daniel Hawk, Diana L. Hayes, Leslie Hayes, Priscilla Hayner, S. Mark Heim, Simo Heininen, Richard P. Heitzenrater, Eila Helander, David Hempton, Scott H. Hendrix, Jan-Olav Henriksen, Gina Hens-Piazza, Carter Heyward, Nicholas J. Higham, David Hilliard, Norman A. Hjelm, Peter C. Hodgson, Arthur Holder, M. Jan Holton, Dwight N. Hopkins, Ronnie Po-chia Hsia, Po-Ho Huang, James Hudnut-Beumler, Jennifer S. Hughes, Leonard M. Hummel, Mary E. Hunt, Laennec Hurbon, Mark Hutchinson, Susan E. Hylen, Mary Beth Ingham, H. Larry Ingle, Dale T. Irvin, Jon Isaak, Paul John Isaak, Ada María Isasi-Díaz, Hans Raun Iversen, Margaret C. Jacob, Arthur James, Maria Jansdotter-Samuelsson, David Jasper, Werner G. Jeanrond, Renée Jeffery, David Lyle Jeffrey, Theodore W. Jennings, David H. Jensen, Robin Margaret Jensen, David Jobling, Dale A. Johnson, Elizabeth A. Johnson, Maxwell E. Johnson, Sarah Johnson, Mark D. Johnston, F. Stanley Jones, James William Jones, John R. Jones, Alissa Jones Nelson, Inge Jonsson, Jan Joosten, Elizabeth Judd, Mulambya Peggy Kabonde, Robert Kaggwa, Sylvester Kahakwa, Isaac Kalimi, Ogbu U. Kalu, Eunice Kamaara, Wayne C. Kannaday, Musimbi Kanyoro, Veli-Matti Kärkkäinen, Frank Kaufmann, Léon Nguapitshi Kayongo, Richard Kearney, Alice A. Keefe, Ralph Keen, Catherine Keller, Anthony J. Kelly, Karen Kennelly, Kathi Lynn Kern, Fergus Kerr, Edward Kessler, George Kilcourse, Heup Young Kim, Kim Sung-Hae, Kim Yong-Bock, Kim Yung Suk, Richard King, Thomas M. King, Robert M. Kingdon, Ross Kinsler, Hans G. Kippenberg, Cheryl A. Kirk-Duggan, Clifton Kirkpatrick, Leonid Kishkovsky, Nadieszda Kizenko, Jeffrey Klaiber, Hans-Josef Klauck, Sidney Knight, Samuel Kobia, Robert Kolb, Karla Ann Koll, Heikki Kotila, Donald Kraybill, Philip D. W. Krey, Yves Krumenacker, Jeffrey Kah-Jin Kuan, Simanga R. Kumalo, Peter Kuzmic, Simon Shui-Man Kwan, Kwok Pui-lan, André LaCocque, Stephen E. Lahey, John Tsz Pang Lai, Emiel Lamberts, Armando Lampe, Craig Lampe, Beverly J. Lanzetta, Eve LaPlante, Lizette Larson-Miller, Ariel Bybee Laughton, Leonard Lawlor, Bentley Layton, Robin A. Leaver, Karen Lebacqz, Archie Chi Chung Lee, Marilyn J. Legge, Hervé LeGrand, D. L. LeMahieu, Raymond Lemieux, Bill J. Leonard, Ellen M. Leonard, Outi Leppä, Jean Lesaulnier, Nantawan Boonprasat Lewis, Henrietta Leyser, Alexei Lidov, Bernard Lightman, Paul Chang-Ha Lim, Carter Lindberg, Mark R. Lindsay, James R. Linville, James C. Livingston, Ann Loades, David Loades, Jean-Claude Loba-Mkole, Lo Lung Kwong, Wati Longchar, Eleazar López, David W. 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Phan, Isabel Apawo Phiri, William S. F. Pickering, Derrick G. Pitard, William Elvis Plata, Zlatko Plese, John Plummer, James Newton Poling, Ronald Popivchak, Andrew Porter, Ute Possekel, James M. Powell, Enos Das Pradhan, Devadasan Premnath, Jaime Adrían Prieto Valladares, Anne Primavesi, Randall Prior, María Alicia Puente Lutteroth, Eduardo Guzmão Quadros, Albert Rabil, Laurent William Ramambason, Apolonio M. Ranche, Vololona Randriamanantena Andriamitandrina, Lawrence R. Rast, Paul L. Redditt, Adele Reinhartz, Rolf Rendtorff, Pål Repstad, James N. Rhodes, John K. Riches, Joerg Rieger, Sharon H. Ringe, Sandra Rios, Tyler Roberts, David M. Robinson, James M. Robinson, Joanne Maguire Robinson, Richard A. H. Robinson, Roy R. Robson, Jack B. Rogers, Maria Roginska, Sidney Rooy, Rev. Garnett Roper, Maria José Fontelas Rosado-Nunes, Andrew C. Ross, Stefan Rossbach, François Rossier, John D. Roth, John K. Roth, Phillip Rothwell, Richard E. Rubenstein, Rosemary Radford Ruether, Markku Ruotsila, John E. Rybolt, Risto Saarinen, John Saillant, Juan Sanchez, Wagner Lopes Sanchez, Hugo N. Santos, Gerhard Sauter, Gloria L. Schaab, Sandra M. Schneiders, Quentin J. Schultze, Fernando F. Segovia, Turid Karlsen Seim, Carsten Selch Jensen, Alan P. F. Sell, Frank C. Senn, Kent Davis Sensenig, Damían Setton, Bal Krishna Sharma, Carolyn J. Sharp, Thomas Sheehan, N. Gerald Shenk, Christian Sheppard, Charles Sherlock, Tabona Shoko, Walter B. Shurden, Marguerite Shuster, B. Mark Sietsema, Batara Sihombing, Neil Silberman, Clodomiro Siller, Samuel Silva-Gotay, Heikki Silvet, John K. Simmons, Hagith Sivan, James C. Skedros, Abraham Smith, Ashley A. Smith, Ted A. Smith, Daud Soesilo, Pia Søltoft, Choan-Seng (C. S.) Song, Kathryn Spink, Bryan Spinks, Eric O. Springsted, Nicolas Standaert, Brian Stanley, Glen H. Stassen, Karel Steenbrink, Stephen J. Stein, Andrea Sterk, Gregory E. Sterling, Columba Stewart, Jacques Stewart, Robert B. 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Yee, Viktor Yelensky, Yeo Khiok-Khng, Gustav K. K. Yeung, Angela Yiu, Amos Yong, Yong Ting Jin, You Bin, Youhanna Nessim Youssef, Eliana Yunes, Robert Michael Zaller, Valarie H. Ziegler, Barbara Brown Zikmund, Joyce Ann Zimmerman, Aurora Zlotnik, Zhuo Xinping
- Edited by Daniel Patte, Vanderbilt University, Tennessee
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- Book:
- The Cambridge Dictionary of Christianity
- Published online:
- 05 August 2012
- Print publication:
- 20 September 2010, pp xi-xliv
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Evidence of Magellanic-like moderate redshift H i-rich galaxies
- Brandon Lawton, Christopher W. Churchill, Brian A. York, Sara L. Ellison, Theodore P. Snow, Rachel A. Johnson, Sean G. Ryan, Chris R. Benn
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- Journal:
- Proceedings of the International Astronomical Union / Volume 4 / Issue S256 / July 2008
- Published online by Cambridge University Press:
- 01 July 2008, pp. 479-485
- Print publication:
- July 2008
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We present equivalent width measurements and limits of six diffuse interstellar bands (DIBs, λ 4428, λ 5705, λ 5780, λ 5797, λ 6284, and λ 6613) in seven damped Lyα absorbers (DLAs) over the redshift range 0.091 ≤ z ≤ 0.524, sampling 20.3 ≤ log N(Hi) ≤ 21.7. Based upon the Galactic DIB–N(H i) relation, the λ 6284 DIB equivalent width upper limits in four of the seven DLAs are a factor of 4–10 times below the λ 6284 DIB equivalent widths observed in the Galaxy, but are not inconsistent with those present in the Magellanic Clouds. Assuming the Galactic DIB–E(B − V) relation, we determine reddening upper limits for the DLAs in our sample. Based upon the E(B − V) limits, the gas-to-dust ratios, N(H i)/E(B − V), of the four aforementioned DLAs are at least ~5 times higher than that of the Galactic ISM and are more consistent with the Large Magellanic Cloud. The ratios of two other DLAs are at least a factor of a few times higher. The best constraints on reddening derive from the upper limits for the λ 5780 and λ 6284 DIBs, which yield E(B − V) ≤ 0.08 mag for four of the seven DLAs and are more consistent with the Magellanic Clouds rather than the Galaxy. Our results suggest that, in DLAs, quantities related to dust, such as reddening and metallicity, appear to have a greater impact on DIB strengths than does H i gas abundance. The molecules responsible for the DIBs in DLA selected sightlines are underabundant relative to sightlines in the Galaxy of similarly high N(H i). Using DIBs to study the ISM of DLAs provide evidence that at least some population of DLAs are more Magellanic-like than Galactic-like.
List of Contributors
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- By John R. Anderson, Benjamin J. Balas, Margaret A. Boden, Todd S. Braver, Selmer Bringsjord, Jerome R. Busemeyer, Nick Chater, Morten H. Christiansen, Axel Cleeremans, Greg Detre, Zoltán Dienes, Wayne D. Gray, Thomas L. Griffiths, Evan Heit, Joseph G. Johnson, Philip N. Johnson-Laird, Charles Kemp, John K. Kruschke, Abninder Litt, Francisco J. López, James L. McClelland, Brian M. Monroe, Ferdinando A. Mussa, Kenneth A. Norman, Stellan Ohlsson, Nicola De, Sean M. Polyn, Stephen J. Read, Grega Repovš, Timothy T. Rogers, Gregor Schöner, David R. Shanks, Thomas R. Shultz, Pawan Sinha, Sylvain Sirois, Aaron Sloman, Sara A. Solla, Ron Sun, Niels A. Taatgen, Joshua B. Tenenbaum, Paul Thagard, Michael S. C. Thomas, Yingrui Yang
- Edited by Ron Sun
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- Book:
- The Cambridge Handbook of Computational Psychology
- Published online:
- 05 June 2012
- Print publication:
- 28 April 2008, pp ix-xii
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Myth: The Trendelenburg position improves circulation in cases of shock
- Sonia Johnson, Sean O. Henderson
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- Journal:
- Canadian Journal of Emergency Medicine / Volume 6 / Issue 1 / January 2004
- Published online by Cambridge University Press:
- 21 May 2015, pp. 48-49
- Print publication:
- January 2004
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