3,158 research outputs found
Potential Effects of Insecticides on the Survival of Dabbling Duck Broods
The effect of insecticides on the survival of dabbling duck broods was investigated by reviewing studies of natural brood survival and depression of growth rates for ducklings raised on wetlands treated with insecticides. Ducklings raised on an insecticide-treated wetland took 5 days longer to reach the normal 14-day body weight. Normal brood mortality for three species of dabbling ducks was highest in the first two weeks of life and ranged from 25% to 51%. High mortality of young ducklings is probably related to their small size. Thus, mortality rates could be in creased to 35% to 70% because of the delay in growth. Other potential effects of invertebrate reductions on breeding dabbling ducks are discussed and suggestions for future research are provided
Ranking Objections to Christian Theism: A Survey of Subjective Declarations and their Correlations with Expert Opinions
There have been numerous books written on the top objections to Christianityâsometimes stated as âcommon,â âmajor,â âfrequent,â âevery day,â âcultural,â âtough,â âdifficultâ objections. However, there is a dearth of behavioral studies in the literature that show how and given population ranks objections to Christianity. As such, the apologist has had to rely on expert opinions from the books that have been authored. These expert opinions are based on familiarity with the literature in the field and contact with laity from university, church, and other speaking engagements. The purpose of this study is to document trends in how people report the relative strength of objections to Christian theism.[1] We analyze whether these trends correlate with popular works of Christian apologistsâour baseline for expert opinion. Further, we determine whether there are any statistically significant relationships between reported demographics, rankings, and attitudes.
Summary of Results and Analysis. Subjective declarations of respondents of the questionnaire showed that most participants were either 18-24 (marginally more than 55-64 and 65-74), male (marginally more than female), had some college (marginally more than bachelorâs, masterâs degrees), lived in a suburban community, or lived in the South. In comparing the expert opinion baseline with the aggregate survey ranking results, we see similar rankings between the objection that âGod is unloving/immoralâ and that the âBible is not inerrantâ (ranked by both as 1st and 2nd, respectively) at the higher end of the spectrum. We found that those identified as agnostic seem to have the closest potential correlation to expert opinion (baseline). The mean of their rankings produced four objections that closely approximated the baseline, one objection that was about one rank removed from the baseline, and three objections that were about two ranks from the baseline. For demographics and rankings, we found statistically significant relationships between religious identification and the objection âGod does not existâ with those who identified as atheists, giving it an average ranking of 3.74 (on a scale of 1-13; 1 = highest, 13 = lowest). For demographics and attitudes, we found statistically significant relationships between religious identification and age, religious discussion importance, and attitude toward Christian theism. (See âAnalysisâ section.)
[1] The study was done under the School of Divinity Department at Liberty University in compliance with Liberty Universityâs Internal Review Board (Research Ethics Office). IRB-FY21-22-12. Policy: Post-2018 Rule. Submitted 07-06-2021. Last approved 09-07-2021, no expiration date applicable
Remarks on Conserved Quantities and Entropy of BTZ Black Hole Solutions. Part I: the General Setting
The BTZ stationary black hole solution is considered and its mass and angular
momentum are calculated by means of Noether theorem. In particular, relative
conserved quantities with respect to a suitably fixed background are discussed.
Entropy is then computed in a geometric and macroscopic framework, so that it
satisfies the first principle of thermodynamics. In order to compare this more
general framework to the prescription by Wald et al. we construct the maximal
extension of the BTZ horizon by means of Kruskal-like coordinates. A discussion
about the different features of the two methods for computing entropy is
finally developed.Comment: PlainTEX, 16 pages. Revised version 1.
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Increasing interest in social studies: Social perspective taking and self-efficacy in stimulating simulations
This study examined the potential of simulations to bolster interest in middle school social studies classrooms. Using a pre-post design, we examined 305 middle school students (49% female) who participated in the web-based GlobalEd simulation. Unlike the motivation declines middle school students usually experience, participants in this simulation became more interested in social studies. We investigated four hypotheses as to why these increases may have occurred. We found no support for the possibility that, (a) studentsâ interest in a particular issue area or (b) their increased valuing of the subject matter, were related to their increased interest. However, results suggested that, (c) the challenging nature of the activity may have bolstered their interest in social studies and (d) studentsâ increased propensity to engage in social perspective taking. The discussion explores future research directions and whether implications for classroom teachers are warranted given the correlational nature of the research
Quasilocal Thermodynamics of Kerr de Sitter Spacetimes and the dS/CFT Correspondence
We consider the quasilocal thermodynamics of rotating black holes in
asymptotic de Sitter spacetimes. Using the minimal number of intrinsic boundary
counterterms, we carry out an analysis of the quasilocal thermodynamics of
Kerr-de Sitter black holes for virtually all possible values of the mass,
rotation parameter and cosmological constant that leave the quasilocal boundary
inside the cosmological event horizon. Specifically, we compute the quasilocal
energy, the conserved charges, the temperature and the heat capacity for the
-dimensional Kerr-dS black holes. We perform a quasilocal stability
analysis and find phase behavior that is commensurate with previous analysis
carried out through the use of Arnowitt-Deser-Misner (ADM) parameters. Finally,
we investigate the non-rotating case analytically.Comment: RevTeX4, 19 pages, 11 figures, a few typos fixed, the version to be
published in Phys. Rev. D6
Boundary Conditions, Energies and Gravitational Heat in General Relativity (a Classical Analysis)
The variation of the energy for a gravitational system is directly defined
from the Hamiltonian field equations of General Relativity. When the variation
of the energy is written in a covariant form it splits into two (covariant)
contributions: one of them is the Komar energy, while the other is the
so-called covariant ADM correction term. When specific boundary conditions are
analyzed one sees that the Komar energy is related to the gravitational heat
while the ADM correction term plays the role of the Helmholtz free energy.
These properties allow to establish, inside a classical geometric framework, a
formal analogy between gravitation and the laws governing the evolution of a
thermodynamic system. The analogy applies to stationary spacetimes admitting
multiple causal horizons as well as to AdS Taub-bolt solutions.Comment: Latex file, 31 pages; one reference and two comments added, misprints
correcte
Fluid Models of Many-server Queues with Abandonment
We study many-server queues with abandonment in which customers have general
service and patience time distributions. The dynamics of the system are modeled
using measure- valued processes, to keep track of the residual service and
patience times of each customer. Deterministic fluid models are established to
provide first-order approximation for this model. The fluid model solution,
which is proved to uniquely exists, serves as the fluid limit of the
many-server queue, as the number of servers becomes large. Based on the fluid
model solution, first-order approximations for various performance quantities
are proposed
Negotiating professional and social voices in research principles and practice
This paper draws on work conducted for a qualitative interview based study which explores the gendered racialised and professional identifications of health and social care professionals. Participants for the project were drawn from the professional executive committees of recently formed Primary Care Trusts. The paper discusses how the feminist psychosocial methodological approach developed for the project is theoretically, practically and ethically useful in exploring the voices of those in positions of relative power in relation to both health and social care services and the social relations of gender and ethnicity. The approach draws on psychodynamic accounts of (defended) subjectivity and the feminist work of Carol Gilligan on a voice-centred relational methodology. Coupling the feminist with the psychosocial facilitates an emphasis on voice and dialogic communication between participant and researcher not always captured in psychosocial approaches which tend towards favouring the interviewer as âgood listenerâ. This emphasis on dialogue is important in research contexts where prior and ongoing relationships with professional participants make it difficult and indeed undesirable for researchers to maintain silence
Rotation and the AdS/CFT correspondence
In asymptotically flat space a rotating black hole cannot be in thermodynamic
equilibrium because the thermal radiation would have to be co-rotating faster
than light far from the black hole. However in asymptotically anti-de Sitter
space such equilibrium is possible for certain ranges of the parameters. We
examine the relationship between conformal field theory in rotating Einstein
universes of dimensions two to four and Kerr anti-de Sitter black holes in
dimensions three to five. The five dimensional solution is new. We find similar
divergences in the partition function of the conformal field theory and the
action of the black hole at the critical angular velocity at which the Einstein
rotates at the speed of light. This should be an interesting limit in which to
study large Yang-Mills.Comment: 24 pages, RevTeX, 1 figure, references adde
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