The Real Costs and Financial Challenges of Library Networking: Part 2

The development of the virtual electronic library and the resulting shift in emphasis from ownership to access raise questions about the responsibility for local collection development. However, access depends on ownership; a network does not create new resources, it facilitates the sharing of existing resources. This sharing has resulted in burdensome levels of interlibrary loan activity. In addition to the financial costs that result from this activity, convenience costs to local users at the lending library and increased preservation costs must be considered. Finally, research libraries will not only be measured by ownership statistics but by access criteria as well, and they will also have to deal with the politics of virtual libraries and networking.published or submitted for publicatio

A study of all high school English work and a tentative outline course for freshman year

Thesis (M.A.)--Boston Universit

Single pilot IFR program overview and status

The history of the General Aviation Single Pilot IFR research program at NASA LaRC was discussed in general terms. The program objective, justification, and technical approach were given. The facilities used to conduct the research were discussed briefly. A general overview of recent accomplishments, present activities and near term plans were given

Some Thoughts about Private Harold L. Green of the Scout Platoon, First Battalion, the Royal Hamilton Light Infantry

Editor’s note: On 12 August the RHLI was ordered to advance towards Clair Tizon. At a small crossroads near the abandoned hamlet of Barbery, the Regiment met German resistance. As the unit moved through the wheatfields, it encountered German infantry and armour. The maelstrom that engulfed the Rileys was later described as “the most intense mortaring and shelling the unit ever witnessed.” All day long the Battalion endured German counterattacks designed to keep the Falaise pocket open. At dusk the Germans withdrew leaving the field to the Canadians. The cost of the battle was high—20 men killed and 100 wounded. Doug Shaughnessy was detailed to help recover the men killed during the battle. While carrying out this duty, Shaughnessy had the heartbreaking experience of discovering the body of his best pal and scout buddy, Private Harold L. Green, who had been felled by a German machine gunner. Shaughnessy states that this tribute to Harry was “written by a soldier who probably knew him better than most and was his closest friend at least in the last year of his life and who buried him in a soldier’s grave on a hill top above the town of Bretteville-sur-Laize in Normandy.

Complex Scalar Dark Matter vis-\`{a}-vis CoGeNT, DAMA/LIBRA and XENON100

The CoGeNT and DAMA/LIBRA experiments have found evidence for the spin-independent scattering from nuclei of a light dark matter (DM) particle, 7-12 GeV, which is not excluded by the XENON DM experiments. We show that this putative DM signal can be explained by a complex scalar singlet extension of the standard model (CSM), with a thermal cosmological DM density, and a Higgs sector that is consistent with LEP constraints. We make predictions for the masses, production, and decays of the two Higgs mass eigenstates and describe how the Higgs and DM particles can be discovered at the LHC.Comment: 27 pages, 14 figures, PRD versio

Light Higgs Boson, Light Dark Matter and Gamma Rays

A light Higgs boson is preferred by $M_W$ and $m_t$ measurements. A complex scalar singlet addition to the Standard Model allows a better fit to these measurements through a new light singlet dominated state. It then predicts a light Dark Matter (DM) particle that can explain the signals of DM scattering from nuclei in the CoGeNT and DAMA/LIBRA experiments. Annihilations of this DM in the galactic halo, $AA\rightarrow b\bar{b}, c\bar{c}, \tau^+\tau^-$, lead to gamma rays that naturally improve a fit to the Fermi Large Area Telescope data in the central galactic regions. The associated light neutral Higgs boson may also be discovered at the Large Hadron Collider.Comment: 19 pages, 7 figures, 1 tabl

Dark Matter on Top

We consider a simplified model of fermionic dark matter which couples exclusively to the right-handed top quark via a renormalizable interaction with a color-charged scalar. We first compute the relic abundance of this type of dark matter and investigate constraints placed on the model parameter space by the latest direct detection data. We also perform a detailed analysis for the production of dark matter at the LHC for this model. We find several kinematic variables that allow for a clean signal extraction and we show that the parameter space of this model will be well probed during LHC Run-II. Finally, we investigate the possibility of detecting this type of dark matter via its annihilations into gamma rays. We compute the continuum and the line emission (which includes a possible "Higgs in Space" line) and its possible discovery by future gamma-ray telescopes. We find that the annihilation spectrum has distinctive features which may distinguish it from other models.Comment: 26 pages, 13 figures. v2: included additional elastic scattering processe

The NMSSM at the Cosmic Frontier for Snowmass 2013

We examine the NMSSM at the cosmic frontier in the post Higgs discovery world. For DM relic abundance consistent with measurement, we find the neutralino can either be singlino or bino dominated. Wino and higgsino DM generally yield a lower abundance, but offer opportunities of detection at IceCube. For both cases, future SI direct detection experiments cover a majority of the model, including nearly all of the bino and higgsino scenarios.Comment: 3 pages, 1 figure, Snowmass whitepaper submissio

Singlet Higgs Phenomenology and the Electroweak Phase Transition

We study the phenomenology of gauge singlet extensions of the Standard Model scalar sector and their implications for the electroweak phase transition. We determine the conditions on the scalar potential parameters that lead to a strong first order phase transition as needed to produce the observed baryon asymmetry of the universe. We analyze the constraints on the potential parameters derived from Higgs boson searches at LEP and electroweak precision observables. For models that satisfy these constraints and that produce a strong first order phase transition, we discuss the prospective signatures in future Higgs studies at the Large Hadron Collider and a Linear Collider. We argue that such studies will provide powerful probes of phase transition dynamics in models with an extended scalar sector.Comment: 36 pages, 13 figures, matches published version; Version with higher resolution figures available at http://www.its.caltech.edu/~profumo/higgs/EWPT.pd

Individual recognition between mother and infant bats (Myotis)

The recognition process and the basis for that recognition, in brown bats, between mother and infant are analyzed. Two parameters, ultrasonic communication and olfactory stimuli, are investigated. The test animals were not allowed any visual contact. It was concluded that individual recognition between mother and infant occurred. However, it could not be determined if the recognition was based on ultrasonic signals or olfactory stimuli