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Articles 91 - 110 of 110
Full-Text Articles in Physical Sciences and Mathematics
Seismic Landslide Hazard Mapping For Greater Vancouver, British Columbia, Ali Fallah Yeznabad, Sheri E. Molnar, Hesham M. El Naggar
Seismic Landslide Hazard Mapping For Greater Vancouver, British Columbia, Ali Fallah Yeznabad, Sheri E. Molnar, Hesham M. El Naggar
Western Research Forum
The lower Mainland of southwest British Columbia (BC) hosts about 3.5 million people and significant infrastructures of national importance. Southwestern BC has the highest seismic risk in Canada with significant potential to cause earthquake-induced hazards including tsunamis, liquefaction and landslides. A Cascadia mega-thrust (MW 9) earthquake is predicted to generate $75 billion Canadian dollars in losses. This damage can be resulted from ground shaking or its secondary phenomena like landslides; ground shaking during earthquakes may trigger landslides that can damage or destroy buildings, bury roads and highways and kill and injure people. In Canada, during the past century and …
Modelling Non-Linear Functional Responses In Competitive Biological Systems., Nickolas Goncharenko
Modelling Non-Linear Functional Responses In Competitive Biological Systems., Nickolas Goncharenko
Western Research Forum
One of the most versatile and well understood models in mathematical biology is the Competitive Lotka Volterra (CLV) model, which describes the behaviour of any number of exclusively competitive species (that is each species competes directly with every other species). Despite it's success in describing many phenomenon in biology, chemistry and physics the CLV model cannot describe any non-linear environmental effects (including resource limitation and immune response of a host due to infection). The reason for this is the theory monotone dynamical systems, which was codeveloped with the CLV model, does not apply when this non-linear effect is introduced. For …
Using Computer Algorithms To Elucidate Zebra Finch Reproductive Behaviour, Tanya T. Shoot, Sophie C. Edwards, Robert J. Martin, Susan D. Healy, David F. Sherry, Mark J. Daley
Using Computer Algorithms To Elucidate Zebra Finch Reproductive Behaviour, Tanya T. Shoot, Sophie C. Edwards, Robert J. Martin, Susan D. Healy, David F. Sherry, Mark J. Daley
Western Research Forum
Birds that experience variation in climatic conditions must maintain a stable nest temperature during incubation for successful hatching of offspring. Varying nest structure and incubation behaviour may be the methods birds use to regulate nest temperature. We used a modeling approach to investigate how birds adjust incubation behaviour to ambient temperature.
Hidden Markov Models (HMM) have been used previously to predict the spatial distribution of animals based on the models’ ability to classify movement behaviour. We used a HMM to predict zebra finch (Taeniopygia guttata) incubation behaviour and nest structure from a nest temperature data set. The full …
Text Mining In Chinese Ancient Attires, Lu Wang
Text Mining In Chinese Ancient Attires, Lu Wang
Western Research Forum
Starting from the Shang Dynasty (1600-1046 BCE) when writing system appeared in China, clothing was recorded as symbols to denote social statuses. The hierarchical signification of clothing remained in the following dynasties until the end of imperial China in 1911. The imperial period produced twenty-five official dynastic histories with rich corpuses on the subject of attire, documenting regulations and prohibitions of detailed dress code, a subject being scarcely studied and treated with assumptions today. This research will use text mining tools to identify descriptive words of clothing that reflect Chinese hierarchal ideology from the twenty-five histories. The method is to …
Tinnitus And Dysfunctional Interactions Between Distributed Resting State Networks, Sivayini Kandeepan
Tinnitus And Dysfunctional Interactions Between Distributed Resting State Networks, Sivayini Kandeepan
Western Research Forum
It is known that peripheral lesions in the cochlea or the auditory nerve produce dysfunctional input to central auditory structures and induce changes in the auditory system causing tinnitus. Recently, it has been proposed that the unified percept of tinnitus could be considered as an emergent property of multiple overlapping dynamic brain networks, each encoding a specific tinnitus characteristic.
The aim of our study was to investigate the neuronal activation patterns associated with specific clinical tinnitus characteristics using fMRI. We hypothesize that tinnitus clinical characteristics could be associated with specific resting-state activity and connectivity patterns and that this could be …
Real Solution Of Dae And Pdae System, Zahra Mohammadi, Greg Reid
Real Solution Of Dae And Pdae System, Zahra Mohammadi, Greg Reid
Western Research Forum
General systems of differential equations don't have restrictions on the number or type of equations. For example, they can be over or under-determined, and also contain algebraic constraints (e.g. algebraic equations such as in Differential-Algebraic equations (DAE) and Partial differential algebraic equations (PDAE). Increasingly such general systems arise from mathematical modeling of engineering and science problems such as in multibody mechanics, electrical circuit design, optimal control, chemical kinetics and chemical control systems. In most applications, only real solutions are of interest, rather than complex-valued solutions. Much progress has been made in exact differential elimination methods, which enable characterization of all …
A Chimeric Nucleobase - Phenylazo Derivative As An Intrinsic Nucleobase Quencher, Gyeongsu Park, Timothy Martin-Chan, Amer El Samm, Robert H.E. Hudson
A Chimeric Nucleobase - Phenylazo Derivative As An Intrinsic Nucleobase Quencher, Gyeongsu Park, Timothy Martin-Chan, Amer El Samm, Robert H.E. Hudson
Western Research Forum
Molecular beacons are important bioanalytical probes which are most often
constructed from a single-stranded oligonucleotide which has been labeled at
opposite termini with a fluorophore and a quencher. When the fluorophore and
quencher are in close proximity, no fluorescence is observed due to FRET
(Fluorescence Resonance Energy Transfer). DABCYL (4-dimethylaminoazobenzene-
4'-carboxylic acid) has been used as a quencher in the molecular beacon to absorbs
excitation energy from a fluorophore and to dissipate the energy as heat. However,
DABCYL is unable to form a base-pair and is conventionally placed as an overhanging
residue. This produces a derivative wherein the chromophore has …
Ceilometer Measurements From The University Of Western Ontario Of Smoke From The Extraordinary Fires Of 2017 In Western Canada, Achini J K Abayakoon Ms.
Ceilometer Measurements From The University Of Western Ontario Of Smoke From The Extraordinary Fires Of 2017 In Western Canada, Achini J K Abayakoon Ms.
Western Research Forum
Background:
The summer of 2017 saw many fires in Western Canada. Smoke from these fires was transported by winds over to London and was measured using a Lufft CHM15k ceilometer which was installed at the Cronyn Observatory of The University of Western Ontario.
Methods:
The cloud base height can be calculated by the time taken for the backscatter signal to reach the transmitter while the backscatter effects can be used to determine the atmospheric structure using the principle of light detection and ranging (LiDAR).
Results:
Smoke particle concentrations over London, Ontario were observed within 72 hours of the fires taking …
P16. Ralmo Rotational Raman Temperature Retrieval: First Steps Towards The Application Of Optimal Estimation Method (Oem), Shayamila N. Mahagammulla Gamage, Robert Sica, Alexander Haefele
P16. Ralmo Rotational Raman Temperature Retrieval: First Steps Towards The Application Of Optimal Estimation Method (Oem), Shayamila N. Mahagammulla Gamage, Robert Sica, Alexander Haefele
Western Research Forum
Background:
Temperature is an important atmospheric parameter that plays an extensive role in the fields of atmospheric dynamics, climatology, meteorology, and chemistry. Light detection and ranging (lidar), is a remote sensing technology that can be used for atmospheric temperature profiling. A lidar transmits short laser pulses into the atmosphere and the light scattered by the particles in the atmosphere is collected and measured using a telescope. The atmospheric temperatures can be retrieved by analysing the Pure Rotational Raman (PRR) scatter measurements from the nitrogen and oxygen molecules in the atmosphere.
Methods:
In this study use the Optimal Estimation Method (OEM) …
P07. Characterizing The Purple Crow Lidar To Investigate Potential Sources Of Wet Bias, Jeffrey Vankerkhove, Robert J. Sica, Robin Wing, Steve Argall
P07. Characterizing The Purple Crow Lidar To Investigate Potential Sources Of Wet Bias, Jeffrey Vankerkhove, Robert J. Sica, Robin Wing, Steve Argall
Western Research Forum
The Purple Crow Lidar is a large aperture lidar, capable of retrieving water vapor profiles into the stratosphere. Water vapor in the upper Troposphere-Lower Stratosphere (UTLS) region is of particular importance in understanding Earth's radiative budget and atmospheric dynamics, making accurate UTLS measurements crucial. A comparison campaign with the NASA/GSFC ALVICE mobile lidar in the spring of 2012 showed PCL water vapor measurements were consistently larger than those of ALVICE in the lower stratosphere, prompting an investigation to characterize the system. The investigation looks into how changes to the data processing approach, as well as applying additional instrumental corrections, would …
P26. Global Exponential Stabilization On So(3), Soulaimane Berkane
P26. Global Exponential Stabilization On So(3), Soulaimane Berkane
Western Research Forum
Global Exponential Stabilization on SO(3)
Rotman Institute Speaker: Feminist Neo-Materialism And The Future Of Phenomenology, Dorothea Olkowski
Rotman Institute Speaker: Feminist Neo-Materialism And The Future Of Phenomenology, Dorothea Olkowski
Future Directions in Feminist Phenomenology
No abstract provided.
Have We Been Successful? A Policy-Maker’S Guide To The Galaxy Of Measuring Inequities Over Time, Patricia Martens
Have We Been Successful? A Policy-Maker’S Guide To The Galaxy Of Measuring Inequities Over Time, Patricia Martens
Population Change and Lifecourse Strategic Knowledge Cluster Conferences
No abstract provided.
Risky Retirement And The Role Of Public Policy, Tammy Schirle
Risky Retirement And The Role Of Public Policy, Tammy Schirle
Population Change and Lifecourse Strategic Knowledge Cluster Conferences
No abstract provided.
Longevity And Retirement: Thinking Outside The Box On Canada’S Retirement Income System, Michael Wolfson
Longevity And Retirement: Thinking Outside The Box On Canada’S Retirement Income System, Michael Wolfson
Population Change and Lifecourse Strategic Knowledge Cluster Conferences
No abstract provided.
The Impact Of Canadian Immigrant Selection Policy On Future Imbalances In Labour Force Supply By Broad Skill Levels, Alain Bélanger
The Impact Of Canadian Immigrant Selection Policy On Future Imbalances In Labour Force Supply By Broad Skill Levels, Alain Bélanger
Population Change and Lifecourse Strategic Knowledge Cluster Conferences
No abstract provided.
Gender Ideology In The Physical Sciences: Philosophical Arguments, ÁGnes KováCs, LáSzló Ropolyi
Gender Ideology In The Physical Sciences: Philosophical Arguments, ÁGnes KováCs, LáSzló Ropolyi
XIV IAPh Symposium 2010
This presentation is part of the Feminist Perspectives in the Sciences: Physics, Chemistry and Climate Science track.
Feminist science criticism has overwhelmingly concerned itself with biological theories on sex and gender difference. Feminist critics (Bleier, Hubbard, Fausto-Sterling, Haraway) have discredited these theories by arguing that gender bias resulted in cognitive distortions and misrepresentation of the subject of inquiry. Feminist philosophers of science (Harding, Longino, and Nelson, among others), elaborated epistemological frameworks to account for these gender biases in science. There is nothing specific in their theories which would limit their validity to the social and life sciences, and yet no …
Historicity And Ecological Restoration, Eric Desjardins
Historicity And Ecological Restoration, Eric Desjardins
Research Day (Arts & Humanities, FIMS, and Education)
Traditional ecological restoration often relies on ideals of reversibility and balance of nature. I suggest that we should change these for a path-dependent view of natural processes. This conceptual shift also invites for philosophical and methodological revisions, such as favouring “futuristic” dynamic goals and alternative state models.
Idealization In Scientific Explanation, Robert Batterman, Nicolas Fillion, Robert Moir, James Overton
Idealization In Scientific Explanation, Robert Batterman, Nicolas Fillion, Robert Moir, James Overton
Research Day (Arts & Humanities, FIMS, and Education)
Many phenomena pose interesting “fundamental” questions for both physics and philosophy of science. Understanding and explanation often seem to require non-Galilean, essential idealizations. But idealizations are false. This fact suggests that we need to give up on the view that truth is a necessary condition for explanation.
An Analytical And Numerical Treatment Of The Carter Constant For Inclined Elliptical Orbits About A Massive Kerr Black Hole, Peter Komorowski, Sree Ram Valluri, Martin Houde
An Analytical And Numerical Treatment Of The Carter Constant For Inclined Elliptical Orbits About A Massive Kerr Black Hole, Peter Komorowski, Sree Ram Valluri, Martin Houde
WORLDiscoveries Research Showcase
In an extreme binary black hole system, an orbit will increase its angle of inclination (i) as it evolves in Kerr spacetime. We focus our attention on the behaviour of the Carter constant (Q) for near-polar orbits. The value of Q for bound orbits is non-negative; and an increase in Q corresponds to an increase in i. For a Schwarzschild black hole, the polar orbit represents the boundary between the prograde and retrograde orbits at which Q is at its maximum value. The introduction of spin (S = |J|/M2) to the massive black hole causes this boundary, or Abutment, to …