12,046 research outputs found
John Robert Eyer: Entomological Work in Pennsylvania and Lists of Publications
(excerpt)
John Robert Eyer died at Carlsbad, New Mexico, on January 30, 1976. J. G. Watts and W. A. Iselin (1976), his former colleagues in the Department of Botany and Entomology at New Mexico State University, Las Cruces, wrote an obituary and quite naturally focused on Eyer\u27s work at the University\u27s Agricultural Experiment Station. Since Dr. Eyer\u27s first positions in entomology were in Pennsylvania, we have prepared this biographical sketch to preserve the record of his early accomplishments
Fourlined Plant Bug (Hemiptera: Miridae), a Reappraisal: Life History, Host Plants, and Plant Response to Feeding
Phenology of the fourlined plant bug, Poecilocapsus lineatus, is presented for southcen- tral Pennsylvania; life history and habits are re-examined. Although breeding was previously thought to occur only on woody plants, we found that nymphs develop on numerous herbs. An extensive list of hosts, more than 250 species in 57 families, is compiled from the literature and the authors\u27 observations; preferences are noted for plants in the Labiatae, Solanaceae, and Compositae. Damage consists of lesions on foliage, the size and shape of the spots varying with leaf texture, pubescence, and venation. Plant response to feeding is immediately visible, the lesions seeming to appear simultaneously with insertion of the bug\u27s stylets. Histolysis of plant tissues, the most rapid response to mind feeding yet reported, is attributed to a potent lipid enzyme whose active constituents are under investigation
Evaluation of a semi-active gravity gradient system. Volume I - Technical summary
Semi-active gravity gradient system for attitude control of earth oriented spacecraf
Evaluation of a semi-active gravity gradient system. Volume II - Appendices
Evaluation of semi-active gravity gradient system - appendixe
Vacuum state of the quantum string without anomalies in any number of dimensions
We show that the anomalies of the Virasoro algebra are due to the asymmetric
behavior of raising and lowering operators with respect to the ground state of
the string. With the adoption of a symmetric vacuum we obtain a non-anomalous
theory in any number of dimensions. In particular for D=4.Comment: 14 pages, LaTex, no figure
Non-analytical power law correction to the Einstein-Hilbert action: gravitational wave propagation
We analyze the features of the Minkowskian limit of a particular
non-analytical f(R) model, whose Taylor expansion in the weak field limit does
not hold, as far as gravitational waves (GWs) are concerned. We solve the
corresponding Einstein equations and we find an explicit expression of the
modified GWs as the sum of two terms, i.e. the standard one and a modified
part. As a result, GWs in this model are not transverse, and their polarization
is different from that of General Relativity. The velocity of the GW modified
part depends crucially on the parameters characterizing the model, and it
mostly results much smaller than the speed of light. Moreover, this
investigation allows one to further test the viability of this particular f(R)
gravity theory as far as interferometric observations of GWs are concerned.Comment: 18 pages, 3 figure
Phase field modeling of electrochemistry II: Kinetics
The kinetic behavior of a phase field model of electrochemistry is explored
for advancing (electrodeposition) and receding (electrodissolution) conditions
in one dimension. We described the equilibrium behavior of this model in [J. E.
Guyer, W. J. Boettinger, J.A. Warren, and G. B. McFadden, ``Phase field
modeling of electrochemistry I: Equilibrium'', cond-mat/0308173]. We examine
the relationship between the parameters of the phase field method and the more
typical parameters of electrochemistry. We demonstrate ohmic conduction in the
electrode and ionic conduction in the electrolyte. We find that, despite making
simple, linear dynamic postulates, we obtain the nonlinear relationship between
current and overpotential predicted by the classical ``Butler-Volmer'' equation
and observed in electrochemical experiments. The charge distribution in the
interfacial double layer changes with the passage of current and, at
sufficiently high currents, we find that the diffusion limited deposition of a
more noble cation leads to alloy deposition with less noble species.Comment: v3: To be published in Phys. Rev. E v2: Attempt to work around
turnpage bug. Replaced color Fig. 4a with grayscale 13 pages, 7 figures in 10
files, REVTeX 4, SIunits.sty, follows cond-mat/030817
Understanding light quanta: First quantization of the free electromagnetic field
The quantization of the electromagnetic field in vacuum is presented without
reference to lagrangean quantum field theory. The equal time commutators of the
fields are calculated from basic principles. A physical discussion of the
commutators suggest that the electromagnetic fields are macroscopic emergent
properties of more fundamental physical system: the photons
Social inclusion: Context, theory and practice
This paper reviews the literature on social inclusion in Australia and provides an overview of the current situation regarding university/community engagement. Social inclusion is a contested term in both academic and policy literature entailing a range of interpretations. The paper will argue that there is a spectrum of ideological positions underlying theory, policy and practice. The broad theoretical construct put forward regards social inclusion in relation to areas (who is to be included?) and degrees (ideologies) of inclusion. Possible areas of inclusion are socio‐economic status, culture (including indigenous cultures), linguistic group, religion, geography (rural and remote/isolated), gender, sexual orientation, age (including youth and old age), physical and mental health/ability, and status with regard to unemployment, homelessness and incarceration. Degree of inclusion comprises a nested threefold schema incorporating a spectrum of ideologies involving—from narrowest to most encompassing—the neoliberal focus on access and economic factors, the social justice focus on community participation and the human potential focus on personal and collective empowerment stemming from positive psychology and critical/transformative pedagogies. Contemporary Australian social inclusion policy is related to UK policy. While policy rhetoric indicates a broad interpretation of social inclusion, concerns are raised that a dominant Economicist agenda favours corporate and national economic interests over social and psychological ones. Questions are also raised about the privileging of some areas of inclusion over others and the possibility that reductive interpretations of social inclusion are forms of cultural assimilation. Social inclusion in practice is addressed both in relation to degrees of inclusion and through case studies. The paper provides an overview of examples of social inclusion interventions, including a review of two initiatives of RMIT University and Victoria University focussing on industry/community partnerships. The paper concludes with some challenges and issues for further research on social inclusion including a proposed in-depth survey and consideration of literature on integrative phenomena such as ecological sustainability, and contextualisation of social inclusion within broader movements of global socio‐cultural change
Gravity and Nonequilibrium Thermodynamics of Classical Matter
Renewed interest in deriving gravity (more precisely, the Einstein equations)
from thermodynamics considerations [1, 2] is stirred up by a recent proposal
that 'gravity is an entropic force' [3] (see also [4]). Even though I find the
arguments justifying such a claim in this latest proposal rather ad hoc and
simplistic compared to the original one I would unreservedly support the call
to explore deeper the relation between gravity and thermodynamics, this having
the same spirit as my long-held view that general relativity is the
hydrodynamic limit [5, 6] of some underlying theories for the microscopic
structure of spacetime - all these proposals, together with that of [7, 8],
attest to the emergent nature of gravity [9]. In this first paper of two we set
the modest goal of studying the nonequilibrium thermodynamics of classical
matter only, bringing afore some interesting prior results, without invoking
any quantum considerations such as Bekenstein-Hawking entropy, holography or
Unruh effect. This is for the sake of understanding the nonequilibrium nature
of classical gravity which is at the root of many salient features of black
hole physics. One important property of gravitational systems, from
self-gravitating gas to black holes, is their negative heat capacity, which is
the source of many out-of-the ordinary dynamical and thermodynamic features
such as the non-existence in isolated systems of thermodynamically stable
configurations, which actually provides the condition for gravitational
stability. A related property is that, being systems with long range
interaction, they are nonextensive and relax extremely slowly towards
equilibrium. Here we explore how much of the known features of black hole
thermodynamics can be derived from this classical nonequilibrium perspective. A
sequel paper will address gravity and nonequilibrium thermodynamics of quantum
fields [10].Comment: 25 pages essay. Invited Talk at Mariofest, March 2010, Rosario,
Argentina. Festschrift to appear as an issue of IJMP
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