196,302 research outputs found
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States" By M. Carey.
No full text"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States: containing bried sketches of the moral and political character of those states.
By M. Carey, member of the American philosophical, and of the American Antiquarian Society, and author of The Olive Branch, Cindiciae Hibernicae, essays on banking, on political economy, and on internal improvement.
To which are now added the English editor's comments on the subject; together with Important Advice to Emigrants, and Cautions Against Impositions Practiced in the Outports
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Dr. Glendon Swarthout
No full textHosted by Roger M. Busfield, MSU Assistant Professor of Speech and Theater, Meet the Author is designed to introduce a general audience to a contemporary author and their work through in-depth interviews. This episode features a conversation between Dr. Glendon Swarthout, prolific author and English professor at MSU, and assistant professors Sam S. Baskett and Theodore B. Strandness
Simulation of thermal plant optimization and hydraulic aspects of thermal distribution loops for large campuses
No full textFollowing an introduction, the author describes Texas A&M University and its utilities system. After that, the author presents how to construct simulation models for chilled water and heating hot water distribution systems. The simulation model was used in a $2.3 million Ross Street chilled water pipe replacement project at Texas A&M University. A second project conducted at the University of Texas at San Antonio was used as an example to demonstrate how to identify and design an optimal distribution system by using a simulation model. The author found that the minor losses of these closed loop thermal distribution systems are significantly higher than potable water distribution systems. In the second part of the report, the author presents the latest development of software called the Plant Optimization Program, which can simulate cogeneration plant operation, estimate its operation cost and provide optimized operation suggestions. The author also developed detailed simulation models for a gas turbine and heat recovery steam generator and identified significant potential savings. Finally, the author also used a steam turbine as an example to present a multi-regression method on constructing simulation models by using basic statistics and optimization algorithms. This report presents a survey of the author??s working experience at the Energy Systems Laboratory (ESL) at Texas A&M University during the period of January 2002 through March 2004. The purpose of the above work was to allow the author to become familiar with the practice of engineering. The result is that the author knows how to complete a project from start to finish and understands how both technical and nontechnical aspects of a project need to be considered in order to ensure a quality deliverable and bring a project to successful completion. This report concludes that the objectives of the internship were successfully accomplished and that the requirements for the degree of Degree of Engineering have been satisfied
Limit cycles for generalized Abel equation
No full textConselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPqIn this work we conducted a study on the equations of the type
dx
dt
=
nå
i=0
ai(t)xi; (A)
where ai 2 C1, i = 0; ;n and 0 t 1. An equation of the form (A) is called a
generalized Abel equation. Our study refers to the problem proposed by C. Pugh: There
is a natural number N depending only on n, such that the equation (A) has at most N limit
cycles?
Initially we study the problem of C. Pugh for n = 1 and n = 2, for which the equation
(A) has at most one and two limit cycles, respectively. For n = 3, A. Lins Neto shows
that if a3(t) does not change sign on [0;1], then the equation (A) has at most three limit
cycles. Also A. Lins Neto shows that, given a natural number l, it is possible to construct
an equation of the form (A) with n = 3 that has at least l limit cycles. Still for n = 3, A.
Gasull and J. Llibre study the problem of C. Pugh considering that a2(t) does not change
sign on [0;1], and M. J. Alvarez, A. Gasull and H. Giacomini also study the problem of
C. Pugh considering that there are real numbers a and b such that aa3(t)+ba2(t) does
not change sign on [0;1] and a1(t) = a0(t) = 0. Besides this, we study some more general
results studied by A. Gasull and A. Guillamon.Neste trabalho realizamos um estudo sobre as equações do tipo
dx
dt
=
nå
i=0
ai(t)xi; (A)
onde ai 2 C1, i = 0; ;n e 0 t 1. Uma equação da forma (A) é denominada
equação de Abel generalizada. Nosso estudo se refere ao problema proposto por C. Pugh:
existe um número natural N dependendo apenas de n, tal que a equação (A) possui no
máximo N ciclos limites?
Inicialmente estudamos o problema de C. Pugh para n=1 e n=2, para os quais a equação
(A) possui, no máximo, um e dois ciclos limite, respectivamente. Para n = 3, A. Lins
Neto mostra que, se a3(t) não muda de sinal em [0;1], então a equação (A) possui no
máximo três ciclos limite. Além disso A. Lins Neto mostra que, dado um número natural
l, é possível construir uma equação da forma (A) com n = 3 que possui no mínimo l
ciclos limites. Ainda para n = 3, A. Gasull e J. Llibre estudam o problema de C. Pugh
considerando que a2(t) não muda de sinal em [0;1], e M. J. Álvarez, A. Gasull e H.
Giacomini também estudam o problema de C. Pugh considerando que existem números
reais a e b tais que aa3(t)+ba2(t) não muda de sinal em [0;1] e a1(t) = a0(t) = 0. Além
destes resultados, estudamos alguns resultados mais gerais estudados por A. Gasull e A.
Guillamon
On the number of limit cycles for perturbed pendulum equations
No full textAgraïments: The second author is supported by the project J3452 "Dynamical Systems Methods in Hydrodynamics" of the Austrian Science Fund (FWF).We consider perturbed pendulum-like equations on the cylinder of the form x (x)= _=0^mQ_n, (x) x^ where Q_n, are trigonometric polynomials of degree n, and study the number of limit cycles that bifurcate from the periodic orbits of the unperturbed case =0 in terms of m and n. Our first result gives upper bounds on the number of zeros of its associated first order Melnikov function, in both the oscillatory and the rotary regions. These upper bounds are obtained expressing the corresponding Abelian integrals in terms of polynomials and the complete elliptic functions of first and second kind. Some further results give sharp bounds on the number of zeros of these integrals by identifying subfamilies which are shown to be Chebyshev systems
Limit cycles appearing from the perturbation of a system with a multiple line of critical points
No full textAgraïments: The second author is partially supported by NSFC-10831003 and by AGAUR grant number 2009PIV00064.Consider the planar ordinary differential equation ˙x = -y(1 - y)m, y˙ = x(1 - y)m, where m is a positive integer number. We study the maximum number of zeroes of the Abelian integral M that controls the limit cycles that bifurcate from the period annulus of the origin when we perturb it with an arbitrary polynomial vector field. One of the key points of our approach is that we obtain a simple expression of M based on some successive reductions of the integrals appearing during the procedure
Intern experience at CH���M Hill, Inc.: an internship report
No full textIncludes author's vita"Submitted to the College of Engineering of Texas A&M University in partial
fulfillment of the requirement for the degree of Doctor of Engineering."Includes bibliographical referencesA review of the author's internship experience with CH���M HILL, Inc.
during the period September 1975 through May 1976 is presented. During this nine month
internship the author worked as an Engineer II in the Industrial Processes discipline of this
large consulting engineering firm... The author's prime responsibility was as one of three
lead design engineers on the design of a large wastewater treatment facility for a pulp mill
in Hoquiam, Washington owned by ITT Rayonier Inc. The work generally consisted of the design
of individual treatment units and associated piping and pumping. The purpose of the project
was to provide wastewater treatment capabilities that would satisfy the effluent limitations
(standards) imposed upon the mill by the State of Washington Department of Ecology and the
U.S. Environmental Protection Agency. The author's assignment also entailed necessary
interaction with the project manager and other CH���M HILL design engineers and support staff
members, the client's representatives, and representatives of two other consulting engineering
firms working on the project. Thus, the internship position at CH���M HILL provided considerable
experience coordinating the author's work with the work of other engineers, guiding the design
and administrative efforts of a support staff, and interacting regularly with the client and
other consulting firms. This broad exposure to a variety of engineering and organizational
problems provided a valuable educational experience
Transition to turbulence in a qblique shock-wave/boundary-layer interaction at M=15
No full textDirect numerical simulations are carried out for different forcing techniques to trigger transition during the interaction between an oblique shock-wave and a laminar boundary-layer at M = 1.5. Three forcing methods are used: a) forcing of oblique unstable modes, whose shape and behaviour are determined by the local linear stability theory, b) broadband free-stream acoustic disturbances, and c) a cold plasma flow control device. While the oblique-mode breakdown is dominant for low-amplitude forcing, long streaky structures drive the transition process in a high-amplitude disturbance environment. LES are also performed on the experimental setup by the Institute of Theoretical and Applied Mechanics (ITAM) from Novosibirsk State University with cold plasma actuation. As well as the disturbance type, the effect of Reynolds number and forcing amplitude will be investigated
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