Browsing Waterloo Research by Title
Now showing items 2367-2386 of 2462
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Use of non-orthogonal factor analysis for gauging illusory halo: A technical report
(2022-05-27)Non-orthogonal factor analysis is examined as a possible aid in assessing the extent of illusory halo in survey responses. Data from several studies involving students' evaluation of teaching (SETs) are re-analyzed with ... -
Use of prospective and retrospective risk assessment methods that simplify chemical mixtures associated with treated domestic wastewater discharges
(Wiley, 2018-03-01)A framework is presented that is intended to facilitate the evaluation of potential aquatic ecological risks resulting from discharges of down-the-drain chemicals. A scenario is presented using representatives of many of ... -
The use of random forests to classify amyloid brain PET
(Wolters Kluwer Health, 2019-10)Purpose: To evaluate random forests (RFs) as a supervised machine learning algorithm to classify amyloid brain PET as positive or negative for amyloid deposition and identify key regions of interest for stratification. Methods: ... -
The Use of Random Forests to Identify Brain Regions on Amyloid and FDG PET Associated With MoCA Score
(Wolters Kluwer Health, 2020-06)Purpose: The aim of this study was to evaluate random forests (RFs) to identify ROIs on 18F-florbetapir and 18F-FDG PET associated with Montreal Cognitive Assessment (MoCA) score. Materials and Methods: Fifty-seven subjects ... -
Use of the interRAI CHESS Scale to Predict Mortality among Persons with Neurological Conditions in Three Care Settings
(Public LIbrary of Science, 2014-06-10)Background: Persons with certain neurological conditions have higher mortality rates than the population without neurological conditions, but the risk factors for increased mortality within diagnostic groups are less well ... -
User-Defined Gestures with Physical Props in Virtual Reality
(ACM, 2021-11-05)When interacting with virtual reality (VR) applications like CAD and open-world games, people may want to use gestures as a means of leveraging their knowledge from the physical world. However, people may prefer physical ... -
Using a collaborative research approach to develop an interdisciplinary research agenda for the study of mobile health interventions for older adults.
(JMIR Mhealth Uhealth., 2015-02-10)Background: Seniors with chronic diseases are often called on to self-manage their conditions. Mobile health (mHealth) tools may be a useful strategy to help seniors access health information at the point of decision-making, ... -
Using Available Information in the Assessment of Diagnostic Protocols
(OMICS International, 2015-02-20)A new binary screening or diagnostic test may be combined sequentially with an existing test using either a believe the positive or believe the negative protocol. Interest then lies in estimating the properties of the new ... -
Using differential mobility spectrometry to measure ion solvation: An examination of the roles of solvents and ionic structures in separating quinoline-based drugs
(Royal Society of Chemistry, 2015)Understanding the mechanisms and energetics of ion solvation is critical in many scientific areas. Here, we present a methodlogy for studying ion solvation using differential mobility spectrometry (DMS) coupled to mass ... -
Using Divergent Nozzle with Aerodynamic Lens to Focus Nanoparticles
(University of Waterloo, 2019-03-03)ANSYS Fluent will be used to simulate Computational Fluid Dynamics (CFD) for an efficient lens and nozzle design which will be explained in this paper. We have designed and characterized an aerodynamic lens and a divergent ... -
Using Pyrene Excimer Fluorescence To Probe Polymer Diffusion in Latex Films
(American Chemical Society, 2017-02-28)This study introduces a simple technique that can be used to quantitatively probe interparticle polymer diffusion (IPD) between adjacent particles in a latex film using pyrene excimer fluorescence (PEF). To demonstrate the ... -
Using Pyrene Excimer Fluorescence To Probe the Interactions between Viscosity Index Improvers and Waxes Present in Automotive Oil
(American Chemical Society, 2017-03-28)A new methodology based on pyrene excimer fluorescence (PEF) was applied to quantitatively measure the actual level of intermolecular association between ethylene propylene (EP) copolymers in toluene in the presence of ... -
Using the Instructional Design Process to Effectively Apply UDL to OER: Considerations, Limitations, and Best Practices
(Association of College and Research Libraries (ACRL), 2024-03)The Universal Design for Learning (UDL) framework has begun to have a significant impact on the instructional sphere of academic libraries, shifting how programs are designed, developed, and delivered. In related work, ... -
Utilizing UV-LED pulse width modulation on TiO2 advanced oxidation processes to enhance the decomposition efficiency of pharmaceutical micropollutants
(Elsevier, 2019-04-01)The presence of pharmaceutical and personal care products (PPCPs) in aquatic systems has been a growing cause for concern. Advanced oxidation processes such as UV/TiO2 (ultraviolet light/titanium dioxide) can break down ... -
Vaccines for finfish aquaculture: What do we need to know to make them work?
(Elsevier, 2012-08-08)Aquaculture still faces serious economic impacts due to the loss of animals to disease. A conservative estimate of 5% losses due to disease means that the finfish aquaculture industry loses over $1 billion annually on a ... -
Validity and Reliability of a Short Diet Questionnaire to Estimate Dietary Intake in Older Adults in a Subsample of the Canadian Longitudinal Study on Aging
(MDPI, 2018-10-17)This study assessed test-retest reliability and relative validity of the Short Diet Questionnaire (SDQ) and usability of an online 24 h recall among 232 participants (62 years ± 9.1; 49.6% female) from the Canadian ... -
Value from adversity: How we deal with adversity matters
(Elsevier, 2012-07-01)Participants in our study worked on an anagram task to win a prize while aversive noise played in the background. They were instructed to deal with the noise either by “opposing” it as an interference or by “coping” with ... -
The Value of Admission Clinical Data for Diagnosing Heart Failure in Long-term Care
(Canadian Geriatrics Society, 2013-12-03)Background Heart failure (HF) is common in long-term care (LTC). Diagnostic uncertainty is important barrier to optimal HF management, stemming from inadequate health information transfer upon LTC admission. We determine ... -
The value of multiple perspectives: Problem-solving and critique in the evaluation of social acceptance research—A response to M. Wolsink
(Elsevier, 2019-02-01)Established social acceptance scholar Maarten Wolsink recently published in these pages a critique of an earlier paper of ours, also published in ERSS. In this response, we will review some of Wolsink’s specific methodological ... -
Variable pay: Is it for the worker or the firm?
(Elsevier, 2019-10)Why do firms pay their workers with variable pay? The standard explanation appeals to a problem that the worker faces, e.g., agency. We develop a model of variable pay endogenously driven by the capital structure problem ...