225 research outputs found
Ray P. Holland to Horace Kephart, December 31, 1928
No full textIn a letter to Horace Kephart on December 21, 1928, Ray P. Holland, Editor of “Field & Stream” writes to tell Kephart that his article “Afoot and Awing in the Great Smokies” was chosen as one of the ten best stories of the month by a committee of judges of the Franklin Square Agency.RAY P. HOLLAND
EDITOR
ELTINGE F. WARNER
PUBLISHER
578 Madison Avenue
at fifty-seventh street
New York City
Field & Stream's
CONSERVATION
COUNCIL
D. R. ANTHONY, JR.
Congressman; joint Introducer of the Game Refuge Bill.
HORACE M.ALBRIGHT
Superintendent of Yellowstone National Park.
BROOKE ANDERSON
Member of the Federal
Advisory Board of the
Migratory Bird Treaty
Act.
J. B. HARKIN
Commissioner of the
Canadian National Parks.
GEORGE A. LAWYER
Former Chief United
States Game Warden.
WM. B. MERSHON
Sportsman — Author —
Conservationist.
E. W. NELSON
Ex-Chief of the U. S.
Biological Survey.
HARRY S. NEW
U. S. Postmaster General;
joint Introducer of the
Game Refuge Bill in the
United States. Senate.
T. GILBERT PEARSON
President of the National
Association of Audubon
Societies.
THEO. ROOSEVELT
First Executive Chairman
of the National Conference on Outdoor Recreation.
December 31, 1928
Mr. Horace Kephart,
Bryson City, N. C.
Dear Mr. Kephart:
I thought you would be interested
in knowing that your story "Afoot and Awing in
the Great Smokies", published in the January
issue, was chosen by a committee of judges of
the Franklin Square Agency, which is owned by
Harper Brothers, as one of the ten best stories
of the month.
With the best of the holiday greetings,
I am
Sincerely yours,
RPHsFTC
Edito
Ray P. Holland to Horace Kephart, February 20, 1929
No full textIn a letter to Horace Kephart on February 20, 1929, Roy P. Holland, Editor of “Field & Stream” congratulates Kephart on his namesake in the Great Smokies.RAY P. HOLLAND
EDITOR
ELTINGE F. WARNER
PUBLISHER
578 MADISON AVE.
NEW YORK CITY
Field & Stream'*
CONSERVATION
COUNCIL
D. R. ANTHONY, JR.
Congressman; joint Introducer of the Game
Refuge Bill.
HORACE M. ALBRIGHT
Superintendent of Yellowstone National Park.
BROOKE ANDERSON
Member of the Federal
Advisory Board of the
Migratory Bird Treaty
Act.
J. B. HARKIN
Commissioner of the Canadian National Parks.
GEORGE A. LAWYER
Former Chief United
States Game Warden.
WM. B. MERSHON
Sportsman — Author —
Conservationist.
E. W. NELSON
Ex-Chief of the U. S. Biological Survey.
HARRY S. NEW
U.S. Postmaster General;
joint Introducer of the
Game Refuge Bill in the
United States Senate.
T. GILBERT PEARSON
President of the National
Association of Audubon
Societies.
THEO. ROOSEVELT
First Executive Chairman
of the National Conference on Outdoor Recreation.
February 20, 1929
Mr. Horace Kephart,
Bryson City, H. C.
Dear Mr. Kephart:
Have yours of the 16th. Congratulations that you have a namesake. If anybody in
this world is entitled to have one of the peaks
of the Great Smokies named after him, you're the
man.
Sometime I'm coming down in that
country and catch some trout from the streams of
Mount Kephart.
Sincerely yours,
^,R^C
Dictated by Mr, Holland
but sigBti li kit itmm
RPHtFTC
Editor
Development of a project level performance measurement model for improving collaborative design team work
No full textThis research explored a new direction of improving collaborative design by performance measurement. More specifically, a novel 3-dimensional performance measurement model is developed and the purpose of this model is to help project managers improve team collaboration by indicating strengths and weaknesses of team members during the project development process. Considering the complexity of collaborative design work, a multiple criteria model is proposed to reflect the design dynamics, which highlights five performance indicators: efficiency, effectiveness, collaboration, management skills and innovation. These five indicators are mostly influenced by role-based performance measurement criteria (the second dimension). Design and development process (time) is also considered (the third dimension). This 3D model allows all involved design participants to measure work performance at any time during the product development process. In order to develop this model, the role-based task analysis and industrial survey methods were utilized. Three groups of role-based product design and development performance measurement criteria were identified for measuring design performance of the top managers, middle managers and individual designers in a project team. A 3-dimensional performance measurement method was proposed to calculate final performance scores from a performance measurement matrix. The proposed model was evaluated as a tool which can support project managers to reduce potential design and collaboration risks and increase confidence in decision-making process. The model has been discussed on implementing in a web-based application for measuring design performance throughout the product design and development proces
GPU-accelerated depth map generation for X-ray simulations of complex CAD geometries
No full textInteractive x-ray simulations of complex computer-aided design (CAD) models can provide valuable insights for better interpretation of the defect signatures such as porosity from x-ray CT images. Generating the depth map along a particular direction for the given CAD geometry is the most compute-intensive step in x-ray simulations. We have developed a GPU-accelerated method for real-time generation of depth maps of complex CAD geometries. We preprocess complex components designed using commercial CAD systems using a custom CAD module and convert them into a fine user-defined surface tessellation. Our CAD module can be used by different simulators as well as handle complex geometries, including those that arise from complex castings and composite structures. We then make use of a parallel algorithm that runs on a graphics processing unit (GPU) to convert the finely-tessellated CAD model to a voxelized representation. The voxelized representation can enable heterogeneous modeling of the volume enclosed by the CAD model by assigning heterogeneous material properties in specific regions. The depth maps are generated from this voxelized representation with the help of a GPU-accelerated ray-casting algorithm. The GPU-accelerated ray-casting method enables interactive (> 60 frames-per-second) generation of the depth maps of complex CAD geometries. This enables arbitrarily rotation and slicing of the CAD model, leading to better interpretation of the x-ray images by the user. In addition, the depth maps can be used to aid directly in CT reconstruction algorithms.This proceeding may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This proceeding appeared in Grandin, Robert J., Gavin Young, Stephen D. Holland, and Adarsh Krishnamurthy. "GPU-accelerated depth map generation for X-ray simulations of complex CAD geometries." In AIP Conference Proceedings, vol. 1949, no. 1, p. 190002. AIP Publishing LLC, 2018, and may be found at
DOI: 10.1063/1.5031636.
Copyright 2018 Author(s).
Posted with permission
Topological structure of the magnetic solar corona
No full textThe solar corona is a highly complex and active plasma environment, containing many exotic
phenomena such as solar flares, coronal mass ejections, prominences, coronal loops, and bright
points. The fundamental element giving coherence to all this apparent diversity is the strong
coronal magnetic field, the dominant force shaping the plasma there.
In this thesis, I model the 3D magnetic fields of various coronal features using the techniques
of magnetic charge topology (MCT) in a potential field. Often the real coronal field has departures
from its potential state, but these are so small that the potential field method is accurate enough to
pick out the essential information about the structure and evolution of the magnetic field.
First I perform a topological analysis of the magnetic breakout model for an eruptive solar
flare. Breakout is represented by a topological bifurcation that allows initially enclosed flux from
the newly emerging region in my MCT model of a delta sunspot to reconnect out to large distances.
I produce bifurcation diagrams showing how this behaviour can be caused by changing
the strength or position of the emerging flux source, or the force-free parameter α.
I also apply MCT techniques to observational data of a coronal bright point, and compare the
results to 3D numerical MHD simulations of the effects of rotating the sources that underlie the
bright point. The separatrix surfaces that surround each rotating source are found to correspond
to locations of high parallel electric field in the simulations, which is a signature of magnetic
reconnection. The large-scale topological structure of the magnetic field is robust to changes in
the method of deriving point magnetic sources from the magnetogram.
Next, I use a Green’s function expression for the magnetic field to relax the standard topological
assumption of a flat photosphere and extend the concept of MCT into a spherical geometry,
enabling it to be applied to the entire global coronal magnetic field. I perform a comprehensive
study of quadrupolar topologies in this new geometry, producing several detailed bifurcation
diagrams. These results are compared to the equivalent study for a flat photosphere. A new topological
state is found on the sphere which has no flat photosphere analogue; it is named the dual
intersecting state because of its twin separators joining a pair of magnetic null points.
The new spherical techniques are then applied to develop a simple six-source topological
model of global magnetic field reversal during the solar cycle. The evolution of the large-scale
global magnetic field is modelled through one complete eleven-year cycle, beginning at solar minimum.
Several distinct topological stages are exhibited: active region flux connecting across the
equator to produce transequatorial loops; the dominance of first the leading and then the following
polarities of the active regions; the magnetic isolation of the poles; the reversal of the polar field;
the new polar field connecting back to the active regions; the polar flux regaining its dominance;
and the disappearance of the transequatorial loops
MHD mode conversion of fast and slow magnetoacoustic waves in the solar corona
No full textThere are three main wave types present in the Sun’s atmosphere: Alfvén waves and fast and slow magnetoacoustic waves. Alfvén waves are purely magnetic and would not exist if it was not for the Sun’s magnetic field. The fast and slow magnetoacoustic waves are so named due to their relative phase speeds. As the magnetic field tends to zero, the slow wave goes to zero as the fast wave becomes the sound wave. When a resonance occurs energy may be transferred between the different modes, causing one to increase in amplitude whilst the other decreases. This is known as mode conversion. Mode conversion of fast and slow magnetoacoustic waves takes place when the characteristic wave speeds, the sound and Alfvén speeds, are equal. This occurs in regions where the ratio of the gas pressure to the magnetic pressure, known as the plasma β, is approximately unity.
In this thesis we investigate the conversion of fast and slow magnetoacoustic waves as they propagate from low- to high-β plasma. This investigation uses a combination of analytical and numerical techniques to gain a full understanding of the process. The MacCormack finite-difference method is used to model a wave as it undergoes mode conversion. Complementing this analytical techniques are employed to find the wave behaviour at, and distant from, the mode-conversion region. These methods are described in Chapter 2.
The simple, one-dimensional model of an isothermal atmosphere permeated by a uniform magnetic field is studied in Chapter 3. Gravitational acceleration is included to ensure that mode conversion takes place. Driving a slow magnetoacoustic wave on the upper boundary conversion takes place as the wave passes from low- to high-β plasma. This is expanded upon in Chapter 4 where the effects of a non-isothermal temperature profile are examined. A tanh profile is selected to mimic the steep temperature gradient found in the transition region. In Chapter 5 the complexity is increased by allowing for a two-dimensional model. For this purpose we choose a radially-expanding magnetic field which is representative of a coronal hole. In this instance the slow magnetoacoustic wave is driven upwards from the surface, again travelling from low to high β. Finally, in Chapter 6 we investigate mode conversion near a two-dimensional, magnetic null point. At the null the plasma β becomes infinitely large and a wave propagating towards the null point will experience mode conversion.
The methods used allow conversion of fast and slow waves to be described in the various model atmospheres. The amount of transmission and conversion are calculated and matched across the mode-conversion layer giving a full description of the wave behaviour
Interpreting Agreement
No full textThis dissertation is an investigation of the formal status of agreement morphology and its relationship to null arguments. Rejecting Chomsky’s (2000, 2001) claim that valuedness is the formal correlate of interpretability, it is suggested that a more elegant account of the data follows if φ-features of verbal affixes are taken to be valued in the lexicon. Interpretability is argued to be determined in the syntax, according to whether the affix is in a position to receive a Ө-role or not and as such the proposal diverges from that of Pesetsky and Torrego (2005a, 2005b), who also argue for the separation of interpretability and valuedness, but consider both to be lexical properties of a given category. Positing the existence of verbal affixes with valued interpretable φ-features is uncontroversial and this is the analysis adopted for environments such as the participial clause in Finnish, object and complementiser agreement in Modem Standard Arabic and a range of contexts in Modem Irish in which 'pronominal agreement' and full NP or free pronominal arguments are in strictly complementary distribution. It is shown that valued uninterruptible features, while not present in the lexicon according to the Chomskyan model, are necessarily created in the course of the derivation, leading to the conclusion that the computational component must contain an operation for deleting such features under identity with matching identical features of a nominal category. Since this should be no less able to apply to lexically valued uninterpretable features, there is no principled reason to suppose that such features do not exist and this is the analysis adopted for constructions such as certain Finnish adjunct clauses and SVO structures in Modem Standard Arabic, in which agreement and overt arguments co-occur. An important consequence of allowing the interpretability of φ-features to be determined in the syntax is the possibility that the same affix could be interpretable in one environment and uninterruptible in another, exhibiting different syntactic behaviour accordingly, and this is argued to be the case for Finnish possessor agreement and finite verb agreement in Modem Standard Arabic, obviating the need to posit a lexical split as other analyses (e.g. Fassi Fehri, 1993, Toivonen, 2000) have had to. Optional arguments are accounted for by recourse to the idea of a null pronominal with interpretable unvalued-features which probes an agreement head with uninterpretable valued φ-features, a natural consequence of the dissolution of the biconditional relationship between interpretability and valuedness and a direct analogue in Minimalist terms of the category pro of Chomsky (1982) and Rizzi (1986)
Topics in Energy Release and Particle Acceleration in the Heliosphere
No full textThis thesis investigates both the release of energy in solar flares, and the acceleration and transport of particles in various astrophysical situations. While numerical simulations are central to this thesis, these are always motivated by analytical arguments.
A review of flare energy release is given in Chapter 2, with results presented in Chapters 3 and 4. The main goal of the flare work is to investigate the effect of viscosity on energy release rates. Scaling arguments and exact solutions of the magnetohydrodynamic equations are used to interpret the results of two-dimensional numerical simulations of magnetic reconnection. The results support viscous energy dissipation accounting for a significant fraction of flare energy release.
Chapter 5 contains an introduction to astrophysical particle acceleration, using the Fokker-Planck formulation. The theory introduced in this chapter is used to study electron transport in solar flare loops (Section 5.5). A key aspect of the analysis is the expression of the Fokker-Planck equation as a system of stochastic differential equations. A generalisation to the flare loop hard X-ray emission prediction of Conway et al. (1998) is obtained, giving a stronger dependence on density for dispersed initial distributions.
Chapter 6 uses the methods of the previous chapter to study the acceleration of cosmic-rays at the heliospheric termination shock. The applicability of the focused acceleration mechanism of Schlickeiser and Shalchi (2008) is examined using numerical simulations, which are interpreted using analytical arguments based on averaging the stochastic equations. The results show significant limitations in assuming a near-isotropic distribution, a requirement for the focused acceleration mechanism. In addition, momentum diffusion provides a significant effect that cannot be neglected. The theory is extended to include focused deceleration and pure momentum diffusion
Does the NCAA Exploit College Athletes? Rights of Publicity, EA Sports and the Video Game Industry
No full textSean M. Hanlon is a member of the litigation department of Holland & Hart in Denver, Colorado, with a focus on construction and real estate litigation. Prior to joining Holland & Hart, Sean was a litigation associate with GableGotwals in Tulsa, Okla. Previously, he clerked for the Honorable Sam A. Joyner of the United States District Court for the Northern District of Oklahoma. Sean is admitted to practice in both Colorado and Oklahoma. He is also admitted to practice in the United States District Courts for the District of Colorado and the Northern District of Oklahoma.
Professor Ray Yasser has served as plaintiff\u27s counsel in a number of Title IX (gender equality) sports cases, several of which were settled in 1997. He is co-author of Sports Law: Cases and Materials , a sports law casebook widely used in law schools around the country. Professor Yasser, who earned his J.D. in 1974 from Duke Law School, teaches torts, trial practice and sports law. Prior to joining the TU law faculty, he served in the North Carolina Attorney General\u27s Office
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