Photoperiodic regulation of hormones, growth and lactation

Includes bibliographical references (page [13])

Finalist essays from the Center for Homeland Defense and Security's First Annual Essay Competition, 2008

The Center for Homeland Defense and Security (CHDS) announces the winner and finalists of its first annual essay contest. CHDS launched the contest last year to provide people from around the country the opportunity to express their opinions on homeland security issues and to suggest new ideas. The winner and four finalists were selected from eighty contest submissions by a committee comprised of CHDS staff, faculty, and alumni. The variety of the essay topics submitted, as well as the backgrounds of the authors, highlights the vast scope of the impact that homeland security policies, programs, and challenges have on our communities and professions. This year’s contestants were asked to answer the question “What single aspect of Homeland Security has been most successful, and what single aspect will be most critical to Homeland Security success?”Naval Posgraduate School, Center for Homeland Defense and Securit

The Humanitarian FOSS Project

The Humanitarian Free and Open Source Software (Humanitarian FOSS) Project is primarily an educational project whose goal is to engage more undergraduates in building free and open source software (FOSS) that benefits their community. Over the past four years, increasing numbers of undergraduates and computer science programs have been inspired by the Humanitarian FOSS project to make significant contributions to several active open source software development projects that have benefited organizations such as the Portland, Maine Ronald McDonald House, and the New York City Salvation Army. This article provides examples of several Humanitarian FOSS projects and describes other initiatives aimed at promoting undergraduate education about FOSS and its application within the community

Deterministic/Fragmented-Stochastic Exchange for Large Scale Hybrid DFT Calculations

We develop an efficient approach to evaluate range-separated exact exchange for grid or plane-wave based representations within the Generalized Kohn-Sham DFT (GKS-DFT) framework. The Coulomb kernel is fragmented in reciprocal space, and we employ a mixed deterministic-stochastic representation, retaining long wavelength (low-$k$) contributions deterministically and using a sparse ("fragmented") stochastic basis for the high-$k$ part. Coupled with a projection of the Hamiltonian onto a subspace of valence and conduction states from a prior local-DFT calculation, this method allows for the calculation of long-range exchange of large molecular systems with hundreds and potentially thousands of coupled valence states delocalized over millions of grid points. We find that even a small number of valence and conduction states is sufficient for converging the HOMO and LUMO energies of the GKS-DFT. Excellent tuning of long-range separated hybrids (RSH) is easily obtained in the method for very large systems, as exemplified here for the chlorophyll hexamer of Photosystem II with 1,320 electrons.Comment: 9 pages, 3 figure

Notewise: a case study in migrating desktop applications to the web

This thesis discusses the process of rewriting the personal knowledge management application Popcorn as a web application, using AJAX. It will first give a brief overview of the idea of the personal knowledge base, going on to describe Popcorn, an initial implementation of a desktop personal knowledge base. It will then go on to discuss some limitations of Popcorn, and the improvements made in those areas in Notewise, a web based version of Popcorn. It will then go on to discuss the challenges faced in building Notewise, and the solutions that were found. In particular, it will discuss a library built to draw vector lines by stretching diagonal images, and JSDBI, a library that provides object mapping for REST web APIS in javascript – both these libraries proved to be very valuable parts to the Notewise architecture. Lastly, it will take a brief look at early user feedback and reflections on the strengths and weaknesses of the Notewise architecture

Boston Hospitality Review: Fall 2016

The Heart of Successful Hotels: Going Beyond the Monopoly Game Strategy By Joseph Khairallah and Andrea Foster -- Fragments of the Past By Peter Szende and Annie Holcombe -- Hospitality Branding in the Age of the Millennial By Allen Adamson and Chekitan S. Dev -- In 2017 What Will a Restaurant Actually Be? A New Taxonomy By Christopher Muller -- The Unreal Thing: Faux Heritage at Disney By Bradford Hudson -- An Insider’s Look at the 2016 Philadelphia Democratic National Convention: Hospitality and Inclusion at Work By Erin Tucker, Leora Halpern Lanz, and Juan Lesme

Optimized Attenuated Interaction: Enabling Stochastic Bethe-Salpeter Spectra for Large Systems

We develop an improved stochastic formalism for the Bethe-Salpeter equation, based on an exact separation of the effective-interaction $W$ to two parts, $W=(W-v_W)+v_W$ where the latter is formally any translationally-invariant interaction $v_W(r-r')$. When optimizing the fit of $v_W$ exchange kernel to $W$, by using a stochastic sampling of $W$, the difference $W-v_W$ becomes quite small. Then, in the main BSE routine, this small difference is stochastically sampled. The number of stochastic samples needed for an accurate spectrum is then largely independent of system size. While the method is formally cubic in scaling, the scaling prefactor is small due to the constant number of stochastic orbitals needed for sampling $W$.Comment: 9 pages, 5 figures, 2 table

Pressure of thermal excitations in superfluid helium

We find the pressure, due to the thermal excitations of superfluid helium, at the interface with a solid. The separate contributions of phonons, $R^-$ rotons and $R^+$ rotons are derived. The pressure due to $R^-$ rotons is shown to be negative and partially compensates the positive contribution of $R^+$ rotons, so the total roton pressure is positive but several times less than the separate $R^-$ and $R^+$ roton contributions. The pressure of the quasiparticle gas is shown to account for the fountain effect in $HeI I$. An experiment is proposed to observe the negative pressure due to $R^-$ rotons.Comment: 14 pages, 4 figure