5,711 research outputs found
Local tsunami evacuation analysis of Cannon Beach, Arch Cape, and Falcon Cove, Clatsop County, Oregon
No full textby Laura L.S. Gabel, Fletcher E. O'Brien, and Jonathan C. Allan.Title from PDF cover (viewed on March 14, 2022)."This report shows modeled pedestrian evacuation routes to escape a local tsunami generated by an earthquake on the Cascadia Subduction Zone (CSZ) for the communities of Cannon Beach, Arch Cape, and Falcon Cove, Clatsop County"--Page ii.This archived document is maintained by the State Library of Oregon as part of the Oregon Documents Depository Program. It is for informational purposes and may not be suitable for legal purposes.Includes bibliographical references (pages 37-39).Mode of access: Internet from the Oregon Government Publications Collection.Text in English
Lu People
No full textArticle describing the Lu people living along the Mekong River.Section from the Ethnic groups of mainland Southeast Asia /Frank M LeBar; Gerald Cannon
Hickey; John K Musgrave. New Haven : Human Relations Area Files
Press, 1964, 206-213
Combined APOGEE-GALAH stellar catalogues using the Cannon
No full textAPOGEE and GALAH are two high resolution multi-object spectroscopic surveys
that provide fundamental stellar parameters and multiple elemental abundance
estimates for about half a million stars in the Milky Way. Both surveys observe
in different wavelength regimes and use different data reduction pipelines
leading to significant offsets and trends in stellar parameters and abundances
for the common stars observed in both surveys. Such systematic
differences/offsets in stellar parameters and abundances make it difficult to
effectively utilise them to investigate Galactic abundance trends in spite of
the unique advantage provided by their complementary sky coverage and different
Milky Way components they observe. Hence, we use the \textit{Cannon}
data-driven method selecting a training set of 4418 common stars observed by
both surveys. This enables the construction of two catalogues, one with the
APOGEE scaled and the other with the GALAH scaled stellar parameters. Using
repeat observations in APOGEE and GALAH, we find high precision in metallicity
(~ 0.02-0.4 dex) and alpha abundances (~ 0.02-0.03 dex) for spectra with good
signal-to-noise ratio (SNR > 80 for APOGEE, SNR > 40 for GALAH). We use open
and globular clusters to validate our parameter estimates and find small
scatter in metallicity (0.06 dex) and alpha abundances (0.03 dex) in APOGEE
scaled case. The final catalogues have been cross matched with the Gaia EDR3
catalogue to enable their use to carry out detailed chemo-dynamic studies of
the Milky Way from perspectives of APOGEE and GALAH.Comment: 24 pages, 20 figures, Accepted for publication in MNRAS after major
revision of the previous version of the manuscript titled "The GALAH survey:
Milky Way disc metallicity and alpha-abundance trends in combined
APOGEE-GALAH catalogues
Measurement of the ionospheric scintillation parameter C<sub>k</sub>L from SAR images of clutter
No full textSpace-based synthetic aperture radar (SAR) can be affected by the ionosphere, particularly at L-band and below. A technique is described that exploits the reduction in SAR image contrast to measure the strength of ionospheric turbulence parameter C k L. The theory describing the effect of the ionosphere on the SAR point spread function (PSF) and the consequent effect on clutter is reviewed and extended. This theory can then be used to determine C k L from both corner reflectors (CRs) and K-distributed SAR clutter. Measuring the K-distribution order parameter allows CkL values much lower than those that defocus the image to be determined. The results of an experiment in which a CR on Ascension Island was repeatedly imaged by PALSAR-2 in the spotlight mode during the scintillation season are described. The value of C k L obtained by measuring the clutter was compared with that obtained from a nearby CR. The correlation between the two was good using a median value of the spectral index p. This correlation was improved by using the measured value of p derived from the CR PSF. The technique works for any homogeneous K-distributed SAR clutter and is thus applicable to extra-terrestrial bodies as well as PALSAR-2 images of Ascension Island
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Box 9: Album, c. 1930-1940
No full textScrapbook page featuring 6 photos of Byrd Williams III and his friends. Names written on page: Louise, Harold Soucy, Byrd Williams III (bottom right photo with K. C.), Katherine Cannon, A.M.J., J. W. Sprinkle
Polynomial approach to nonlinear predictive generalized minimum variance control
No full textA relatively simple approach to non-linear predictive generalised minimum variance (NPGMV) control is introduced for non-linear discrete-time multivariable systems. The system is represented by a combination of a stable non-linear subsystem where no structure is assumed and a linear subsystem that may be unstable and modelled in polynomial matrix form. The multi-step predictive control cost index to be minimised involves both weighted error and control signal costing terms. The NPGMV control law involves an assumption on the choice of cost-function weights to ensure the existence of a stable non-linear closed-loop operator. A valuable feature of the control law is that in the asymptotic case, where the plant is linear, the controller reduces to a polynomial matrix version of the well known generalised predictive control (GPC) controller. In the limiting case when the plant is non-linear and the cost-function is single step the controller becomes equal to the polynomial matrix version of the so-called non-linear generalised minimum variance controller. The controller can be implemented in a form related to a non-linear version of the Smith predictor but unlike this compensator a stabilising control law can be obtained for open-loop unstable processes
Limiting the immediate and subsequent hazards associated with wildfires
No full textWildfire is a unique natural hazard because it poses immediate threats to life and property
as well as creating conditions that can lead to subsequent debris flows. In recent years, the
immediate destructive force of wildfires has been decreased through better understanding
of fire behavior. Lightning detection networks now identify the number and locations of
this common ignition source. Measurements of wind speed, temperature, slope, fuel types
and fire boundaries are routinely incorporated into models for fire spread, permitting realtime
adjustments to fire-fighting strategies, thus increasing fire-fighting effectiveness.
Similarly, our capability to limit impacts from post-fire debris flows is improving.
Empirical models for estimating the probability of debris-flow occurrence, the volume of
such an event, and mapping the inundated area, linked with improved definitions of the
rainfall conditions that trigger debris flows, can be used to provide critical information for
post-fire hazard mitigation and emergency-response planning
Wildfires and slope instability
No full textMany natural hazards such as earthquakes and cyclonic storms have distinct damaging effects
and can serve as a trigger to landslide occurrence. The occurrence of damaging effects and
landslides take place, more or less, contemporaneously. Wildfires are a natural hazard that
causes an immediate damage by burning vegetation and flammable parts of the built environment.
Rather than directly triggering landslides, wildfires alter the short-term susceptibility of
slopes to gravity-related phenomena making debris flows more likely during later storm
events.
The papers presented in the “Wildfires and Slope Instability” session centered on two
themes reflecting the difference in how and when slope instability is altered by wildfire
occurrence. The first theme was assessing wildfire effects to forecast the likelihood of
landslides, especially debris flows. The keynote address, “Characterizing the immediate and
subsequent hazards caused by wildfire occurrence” examined recent advances in wildfire
suppression and forecasting of debris flows. Wildfire suppression has improved through earlier
detection using aerial and satellite-based systems and modeling which identifies times of
greater wildfire likelihood and how active wildfires will advance. Similar advances exist for
wildfire-related debris flows, especially the use of modeling to forecast debris flow potential,
likely volumes to occur and probable paths where damage would occur. Another paper on this
theme was “Remote sensing and geospatial support to burned area emergency response
(BAER) teams in assessing wildfire effects to hillslopes”. The rapid identification of the
varied impact of a wildfire to vegetation across the burned landscape is a key tool for
determining potential secondary impacts including debris flow occurrence. Soil burn severity
maps are quickly created through interpretation of spectral reflectance in satellite imagery and
on-the-ground examination of soil in representative locations. The resulting GIS-based product
is readily integrated with other geospatial data and models used to assess wildfire effects
Indian Hill C Style and Coding Standards as amended for U of T Zoology
No full textThis document is an annotated (by the last author) version of the original paper of the same title. It describes a set of coding standards and recommendations which are local standards for officially-supported UNIX programs. The scope is coding style, not functional organization. April 21, 1990 ############### + UNIX is a trademark of Bell Laboratories. Indian Hill C Style and Coding Standards as amended for U of T Zoology UNIX+ L.W. Cannon R.A. Elliott L.W. Kirchhoff J.H. Miller J.M. Milner R.W. Mitze E.P. Schan N.O. Whittington Bell Labs Henry Spencer Zoology Computer Systems University of Toronto 1. Introduction This document is a result of a committee formed at Indian Hill to establish a common set of coding standards and recommendations for the Indian Hill community. The scope of this work is the coding style, not the functional organization of programs. The standards in this document are not specific to ESS programming only 1 . We have tried to combine previous work [1,6]..
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