2,987 research outputs found
Reflections on Capacity Building
Distills lessons learned from the capacity building components of five TCWF initiatives targeting different aspects of public health in California. Part of TCWF's Reflections series
Light Neutralino Dark Matter in the NMSSM
Neutralino dark matter is generally assumed to be relatively heavy, with a
mass near the electroweak scale. This does not necessarily need to be the case,
however. In the Next-to-Minimal Supersymmetric Standard Model (NMSSM) and other
supersymmetric models with an extended Higgs sector, a very light CP-odd Higgs
boson can naturally arise making it possible for a very light neutralino to
annihilate efficiently enough to avoid being overproduced in the early
Universe.
In this article, we explore the characteristics of a supersymmetric model
needed to include a very light neutralino, 100 MeV < \mcnone < 20 GeV, using
the NMSSM as a prototype. We discuss the most important constraints from
Upsilon decays, , and the magnetic moment
of the muon, and find that a light bino or singlino neutralino is allowed, and
can be generated with the appropriate relic density.
It has previously been shown that the positive detection of dark matter
claimed by the DAMA collaboration can be reconciled with other direct dark
matter experiments such as CDMS II if the dark matter particle is rather light,
between about 6 and 9 GeV. A singlino or bino-like neutralino could easily fall
within this range of masses within the NMSSM. Additionally, models with sub-GeV
neutralinos may be capable of generating the 511 keV gamma-ray emission
observed from the galactic bulge by the INTEGRAL/SPI experiment.
We also point out measurements which can be performed immediately at CLEO,
BaBar and Belle using existing data to discover or significantly constrain this
scenario.Comment: References updated, accepted for publication in PR
21st Century Simulation: Exploiting High Performance Computing and Data Analysis
This paper identifies, defines, and analyzes the limitations imposed on Modeling and Simulation by outmoded
paradigms in computer utilization and data analysis. The authors then discuss two emerging capabilities to
overcome these limitations: High Performance Parallel Computing and Advanced Data Analysis. First, parallel
computing, in supercomputers and Linux clusters, has proven effective by providing users an advantage in
computing power. This has been characterized as a ten-year lead over the use of single-processor computers.
Second, advanced data analysis techniques are both necessitated and enabled by this leap in computing power.
JFCOM's JESPP project is one of the few simulation initiatives to effectively embrace these concepts. The
challenges facing the defense analyst today have grown to include the need to consider operations among non-combatant
populations, to focus on impacts to civilian infrastructure, to differentiate combatants from non-combatants,
and to understand non-linear, asymmetric warfare. These requirements stretch both current
computational techniques and data analysis methodologies. In this paper, documented examples and potential
solutions will be advanced. The authors discuss the paths to successful implementation based on their experience.
Reviewed technologies include parallel computing, cluster computing, grid computing, data logging, OpsResearch,
database advances, data mining, evolutionary computing, genetic algorithms, and Monte Carlo sensitivity analyses.
The modeling and simulation community has significant potential to provide more opportunities for training and
analysis. Simulations must include increasingly sophisticated environments, better emulations of foes, and more
realistic civilian populations. Overcoming the implementation challenges will produce dramatically better insights,
for trainees and analysts. High Performance Parallel Computing and Advanced Data Analysis promise increased
understanding of future vulnerabilities to help avoid unneeded mission failures and unacceptable personnel losses.
The authors set forth road maps for rapid prototyping and adoption of advanced capabilities. They discuss the
beneficial impact of embracing these technologies, as well as risk mitigation required to ensure success
A comparison of the achievements of transfer and non-transfer pupils /
Thesis (M. Ed.)--University of Oklahoma, 1939.Includes bibliographical references (leaves 104-108)Main, cop. 1-2.jc/k
Importance of water source in controlling leaf leaching losses in a dwarf red mangrove (Rhizophora mangle L.) wetland
The southern Everglades mangrove ecotone is characterized by extensive dwarf Rhizophora mangle L. shrub forests with a seasonally variable water source (Everglades – NE Florida Bay) and residence times ranging from short to long. We conducted a leaf leaching experiment to understand the influence that water source and its corresponding water quality have on (1) the early decay of R. mangle leaves and (2) the early exchange of total organic carbon (TOC) and total phosphorus (TP) between leaves and the water column. Newly senesced leaves collected from lower Taylor River (FL) were incubated in bottles containing water from one of three sources (Everglades, ambient mangrove, and Florida Bay) that spanned a range of salinity from 0 to 32‰, [TOC] from 710 to 1400 μM, and [TP] from 0.17 to 0.33 μM. We poisoned half the bottles in order to quantify abiotic processes (i.e., leaching) and assumed that non-poisoned bottles represented both biotic (i.e., microbial) and abiotic processes. We sacrificed bottles after 1,2, 5, 10, and 21 days of incubation and quantified changes in leaf mass and changes in water column [TOC] and [TP]. We saw 10–20% loss of leaf mass after 24 h—independent of water treatment—that leveled off by Day 21. After 3 weeks, non-poisoned leaves lost more mass than poisoned leaves, and there was only an effect of salinity on mass loss in poisoned incubations—with greatest leaching-associated losses in Everglades freshwater. Normalized concentrations of TOC in the water column increased by more than two orders of magnitude after 21 days with no effect of salinity and no difference between poisoned and non-poisoned treatments. However, normalized [TP] was lower in non-poisoned incubations as a result of immobilization by epiphytic microbes. This immobilization was greatest in Everglades freshwater and reflects the high P demand in this ecosystem. Immobilization of leached P in mangrove water and Florida Bay water was delayed by several days and may indicate an initial microbial limitation by labile C during the dry season
High-performance computing enables simulations to transform education
This paper presents the case that education in the 21st
Century can only measure up to national needs if technologies developed in the simulation community, further
enhanced by the power of high performance computing,
are harnessed to supplant traditional didactic instruction. The authors cite their professional experiences in simulation, high performance computing and pedagogical studies to support their thesis that this implementation is not only required, it is feasible, supportable and affordable. Surveying and reporting on work in computer-aided education, this paper will discuss the pedagogical imperatives for group learning,
risk management and “hero teacher” surrogates, all being optimally delivered with entity level simulations of varying types. Further, experience and research is adduced to support the thesis that effective implementation of this level of simulation is enabled only by, and is largely dependent upon, high performance computing, especially by the ready utility and acceptable costs of Linux clusters
Senior Recital: Mary Catherine Davis
A Senior Recital featuring Mary Catherine Davis and Dan Marcacci.https://digitalcommons.kennesaw.edu/musicprograms/2426/thumbnail.jp
The Vehicle, Spring 2011
Table of Contents
Note from the Editorpage 5
Vehicle Award Winnerspage 6
James K. Johnson Creative Writing Award Winnerspage 7
GravelDan Davispage 9
ThankfulElizabeth Marlowpage 15
Featured Artist: Sarah Gillespiepage 16
Introspectioncover
Good Observationpage 19
A Onenesspage 20
Life Mandalapage 21
Flora Universalpage 22
Creative Writing Graduate Student Interviewspage 23
Dan Davispage 24
Chris Houchenspage 26
Clint Walkerpage 28
Daniel Paquinpage 30https://thekeep.eiu.edu/vehicle/1094/thumbnail.jp
The Vehicle, Spring 2011
Table of Contents
Note from the Editorpage 5
Vehicle Award Winnerspage 6
James K. Johnson Creative Writing Award Winnerspage 7
GravelDan Davispage 9
ThankfulElizabeth Marlowpage 15
Featured Artist: Sarah Gillespiepage 16
Introspectioncover
Good Observationpage 19
A Onenesspage 20
Life Mandalapage 21
Flora Universalpage 22
Creative Writing Graduate Student Interviewspage 23
Dan Davispage 24
Chris Houchenspage 26
Clint Walkerpage 28
Daniel Paquinpage 30https://thekeep.eiu.edu/vehicle/1094/thumbnail.jp
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