196,681 research outputs found
Existence of solutions to a higher dimensional mean-field equation on manifolds
No full textFor m ≥ 1 we prove an existence result for the equation
(-\Delta_g)^m u+\lambda=\lambda\frac{e^{2mu}}{\int_M e^{2mu}d\mu_g}
on a closed Riemannian manifold (M, g) of dimension 2m for certain values of λ
Asymptotics and quantization for a mean-field equation of higher order
No full textGiven a regular bounded domain < subset of>2m, we describe the limiting behavior of sequences of solutions to the mean field equation of order 2m, m epsilon 1, [image omitted] under the Dirichlet boundary condition and the bound 0C. We emphasize the connection with the problem of prescribing the Q-curvature
Corporate Philanthropy in Top Romanian Companies
Get PDFThis paper aims to provide an insight on the CSR activities developed by top Romanian companies and to analyze whether some economic indexes as number of employees and turnover have a considerable impact on the decision of companies to involve in social responsible activities. The approach is based on a cross-analysis of the statistical weight of donations for eight top company donors in 2007 in Romania. By reviewing the results of the research, the author considers the opportunity to develop a case for CSR, even in its basic form: philanthropy, as a premise for long run social performance.corporate philanthropy, corporate social responsibility, microeconomic indexes, stakeholders.
Design of low-torque-ripple synchronous reluctance motors
No full textA design approach oriented to minimization of torque-ripple is presented, for synchronous reluctance motors of the transverse-laminated type. First, the possible types of rotors are classified and the more suited rotor structure is evidenced, to be matched to a given stator. Then, the inner rotor design is described, pointing-out the low-ripple measures. Last, experimental results are given, from three different rotors: they confirm the validity of the proposed approach
THE EFFECT OF HYPOXIA ON ER-β EXPRESSION IN THE LUNG AND CULTURED PULMONARY ARTERY ENDOTHELIAL CELLS
Get PDFI would like thank my mentor Dr. Tim Lahm for all his guidance, dedication and support. I am eternally grateful for the experience I have had in his lab and believe that any future success that I have is the result of his tutelage. I also would like to extend special thanks and gratitude to Dr. Irina Petrache who has been an inspirational role model and to my advisory committee member Dr. Kelly Schweitzer for her direction and mentorship. Additionally, I would like to acknowledge all the Lahm la
La caratterizzazione di malte storiche e da restauro provenienti dalla terracotta invetriata policroma "Madonna con il Bambino". Risultati preliminari.
No full textA continuous model of transportation revisited
No full textWe review two models of optimal transport, where congestion eff ects during the transport can be possibly taken into account. The first model is Beckmann's one, where the transport activities are modeled by vector fi elds with given divergence. The second one is the model by Carlier et al. (SIAM J Control Optim 47: 1330--1350, 2008), which in turn is the continuous reformulation of Wardrop's model on graphs. We discuss the extensions of these models to their natural functional analytic setting and show that they are indeed equivalent, by using Smirnov decomposition theorem for normal currents
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
Lightning-Induced Disturbances in Buried Cables Part I: Theory
No full textIn this paper, we present a review of theoretical methods to compute lightning induced currents and voltages on buried cables. The evaluation of such induced disturbances requires the calculation of the electric field produced by lightning along the cable path. We show that the Cooray’s simplified formula is capable of predicting accurately the horizontal electric field penetrating the ground, at distances as close as 100 m. Regarding the parameters of the buried cable, a comparison of several approximations of the ground impedance is presented.We show that the Pollaczek expression corresponds to the Sunde general expression, when the displacement current is neglected. The analysis shows also that all the proposed approximations provide very similar results for the considered range of frequencies (up to 30 MHz). Most of the approximate formulas neglect the contribution of the displacement current and, therefore, predict values for the ground impedance which tend to infinity at higher frequencies. This corresponds in the time domain to a singularity of the ground transient resistance at t = 0. By analogy to the Sunde approximation for the ground impedance of overhead lines, we propose a logarithmic approximation for the ground impedance of a buried cable. In addition, unlike most of the considered approximations, the proposed formula has an asymptotic behavior at high frequencies; therefore, the corresponding transient ground resistance in the time domain has no singularity at t = 0. It is also demonstrated that within the frequency range of interest, the wire impedance can be neglected, due to its small contribution to the overall longitudinal impedance of the line. The ground admittance, however, can play an important role at high frequencies (1 MHz or so) especially in the case of poor ground conductivity. The ground admittance needs to be taken into account in the calculation of lightning induced currents and voltages on buried cables. This is in contrast with the case of overhead lines in which its contribution is generally negligible, even in the MHz range. We also investigate the time-domain representation of field-totransmission line coupling equations. The coupling model includes the effect of ground admittance which appears in terms of an additional convolution integral. An analytical expression for the ground transient resistance in the time domain is also proposed which is shown to be sufficiently accurate and nonsingular. Finally, we present a time domain solution of field-to-buried cable coupling equations using the point-centered finite difference time domain (FDTD) method, and a frequency domain solution using Green’s functions. In our companion paper (Part II), we compare both solutions to experimental waveforms obtained using triggered lightning
"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
- …
