Browsing Waterloo Research by Title
Now showing items 592-611 of 2462
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Digital tracking algorithm reveals the influence of structural irregularities on joint movements in the human cervical spine
(Elsevier, 2018-07-01)Background Disc height loss and osteophytes change the local mechanical environment in the spine; while previous research has examined kinematic dysfunction under degenerative change, none has looked at the influence of ... -
Digraphs with All Induced Directed Cycles of the Same Length are not → χ -Bounded
(2022-10-07)For t > 2, let us call a digraph D t-chordal if all induced directed cycles in D have length equal to t. In an earlier paper, we asked for which t it is true that t-chordal graphs with bounded clique number have bounded ... -
Dimensional dependence of the Stokes-Einstein relation and its violation
(American Institute of Physics, 2013-10-28)We generalize to higher spatial dimensions the Stokes-Einstein relation (SER) as well as the leading correction to diffusivity in finite systems with periodic boundary conditions, and validate these results with numerical ... -
Dimensions of Quinoline-Based Foldamers Labeled with Oligo(phenylene vinylene) Probed in Solution by Time-Resolved Fluorescence Anisotropy
(American Chemical Society, 2019-07-24)A series of oligoquinolines (Qn with n = 1 – 32) was prepared with an oligo(phenylene vinylene) (OPV) fluorophore covalently attached at one end via a rigid amide bond. The fluorescence decays of the OPV-Qn solutions in ... -
DiPyMe in SDS Micelles: Artifacts and Their Implications in the Interpretation of Micellar Properties
(American Chemical Society, 2015-11-10)This study provides experimental evidence that di(1-pyrenylmethyl) ether or DiPyMe, a well-known fluorescent probe employed to determine the microviscosity of surfactant or polymeric micelles, is being hydrolyzed in the ... -
Direct coupling of solid phase microextraction with electrospray ionization mass spectrometry: A Case study for detection of ketamine in urine
(Elsevier, 2019-10-10)Electrospray ionization mass spectrometry (ESI-MS) is a commonly used technique for analysis of various samples. Solid phase microextraction (SPME) is a simple and efficient technique that combines both sampling and sample ... -
Direct immersion solid-phase microextraction analysis of multi-class contaminants in edible seaweeds by gas chromatography-mass spectrometry
(Elsevier, 2018-11-15)The present work aimed at the development of a simple and accurate direct immersion-solidphase microextraction-gas-chromatography-mass spectrometry (DI-SPME-GC-MS) method for simultaneous determination of PAHs, PCBs, and ... -
Direct measurement of the capillary pressure characteristics of water-air-gas diffusion layer systems for PEM fuel cells
(Elsevier, 2008-10-01)A method and apparatus for measuring the relationship between air-water capillary pressure and water saturation in PEMFC gas diffusion layers is described. Capillary pressure data for water injection and withdrawal from ... -
Direct Wastewater Treatment Plant Inputs of Microplastics to the Laurentian Great Lakes
(University of Waterloo, 2023-05-15)Whilst wastewater treatment plants (WWTPs) have an inadvertent high microplastics retention capacity (typically >70%), they are also an important point source of pollutants to aquatic environments. This allows WWTPs to ... -
Direct, oxidative halogenation of diaryl- or dialkylphosphine oxides with (dihaloiodo)arenes
(Elsevier, 2018-08)The oxidative halogenation of diaryl- or dialkylphosphine oxides with the hypervalent iodine reagents (difluoroiodo)toluene (p-TolIF2, 1) and (dichloroiodo)benzene (PhICl2, 2) is reported. Phosphoric fluorides could be ... -
Directed precipitation of anhydrous magnesite for improved performance of mineral carbonation of CO2
(Elsevier, 2017-08-01)This paper studies the indirect aqueous carbon sequestration via Mg(OH)2 using directed precipitation technique. This technique produces anhydrous MgCO3 (magnesite), the most desirable carbonated phase for sequestration. ... -
Disabling cities
(Oxford University Press, 2017-01-13)Geographic research on disability and cities is wide-ranging and encompasses the lives of people dealing with disability, physical impairment, and issues of mental ill health. This chapter focuses on what makes cities more ... -
Disciplinary directors: Evidence from the appointments of outside directors who have fired CEOs
(Elsevier, 2018-11-01)By examining board appointments of outside directors who have previously fired a CEO, we study how directors’ willingness to take disciplinary actions is related to a firm's performance and risk-taking. Such directors ... -
Discrete viscous sheets
(Association for Computing Machinery, 2012-07)We present the first reduced-dimensional technique to simulate the dynamics of thin sheets of viscous incompressible liquid in three dimensions. Beginning from a discrete Lagrangian model for elastic thin shells, we apply ... -
Disease Dynamics And Costly Punishment Can Foster Socially Imposed Monogamy
(Nature Publishing Group, 2016-04-01)Socially imposed monogamy in humans is an evolutionary puzzle because it requires costly punishment by those who impose the norm. Moreover, most societies were-and are-polygynous; yet many larger human societies transitioned ... -
Disease Interventions Can Interfere With One Another Through Disease-Behaviour Interactions
(Public Library of Science, 2015-06-01)Theoretical models of disease dynamics on networks can aid our understanding of how infectious diseases spread through a population. Models that incorporate decision-making mechanisms can furthermore capture how behaviour-driven ... -
Disengagement during lectures: Media multitasking and mind wandering in university classrooms
(Elsevier, 2019-04-01)In university classrooms, the use of laptops or smartphones for purposes unrelated to the lecture is on the rise. Consequently, it is important to understand how frequently this behavior occurs, to track whether it increases ... -
Disintermediating Government: The role of Open Data and Smart Infrastructure
(Hawaii International Conference on System Sciences, 2019)Governments are increasingly negotiating the adoption of civic technologies to improve government functioning and to better connect with citizens. Despite the benefits of civic technology to make government more efficient, ... -
Disparities in knowledge about the health effects of smoking among adolescents following the release of new pictorial health warning labels
(Elsevier, 2018-06-01)This paper examined knowledge about the health effects of smoking among health equity groups following the 2012 introduction of refreshed pictorial health warning labels (HWLs) in Canada. Data are from the 2012/2013 Youth ... -
Dispersing representations of semi-simple subalgebras of complex matrices
(Elsevier, 2022-06-01)In this paper we consider the problem of determining the maximum dimension of P?(A!B)P, where A and B are unital, semi-simple subalgebras of the set Mn of n⇥n complex matrices, and P 2 M2n is a projection of rank n. We ...