Sleep as a victim of the “time crunch” – A multinational analysis

As reflected in many popular and academic writings, there is general concern that contemporary life is becoming ruled by a societal “time crunch”, in which work and family pressures make daily life more hectic. One implica-tion of this condition is that sleep time has been reduced in order to accommodate these pressures. While this view seems supported by recent national surveys in which Americans now claim to get less than 7 hours of sleep a night, it is not supported by sleep times reported in 2003-07 ATUS time diaries. If anything, time-diary sleep hours are higher than in previous decades, approaching 60 hours a week in both the US and Canada. Similar levels of sleep hours are found in 18 European counties, with most of those having trend data also showing no decrease in sleep over recent decades, with the exceptions of Germany and Japan. The major predictors of sleep time in US and Canada are work hours and, increasingly, education. The US-Canada finding that women sleep slightly more than men is mainly a reflection of these two predictors. Higher sleep for women is also found in more Northern and Western European countries, but not in more Eastern and Southern Europe; moreover, men in Japan, the country with by far the least sleep report more diary hours of sleep than women.Sleep time, time-diary sleep hours, men, women

New Experiments in Minority Voter Mobilization: Second in a Series of Reports on the California Votes Initiative

During the first phase of the California Votes Initiative, spanning elections from June 2006 to March 2007, participating community-based organizations personally contacted over 82,000 low-propensity voters, through strategies such as door-to-door outreach and phone calls, plus reached an additional 100,000 voters through less direct methods, such as voter forums and messages to congregations. This outreach inspired many to participate in the electoral process for the first time. The initiative evaluation team worked with the community organizations to imbed field experiments into their outreach efforts, comparing turnout among those targeted for contact and those assigned to control groups. This resulted in strong empirical support for a series of best practices that were detailed in a September 2007 report.1 A second phase of the initiative has continued this path-breaking research with further field experiments in the February and June 2008 elections, with more planned for November 2008. This report briefly reviews the results from the first phase of the initiative, adds findings from February 2008 and June 2008 as available,2 and outlines the follow-up studies planned for November 2008. Many findings from the first phase were confirmed, and the two rounds of experiments conducted so far this year provide valuable refinements to the list of best practices established in that earlier report. 1 Michelson, Melissa R., Lisa Garcia Bedolla and Donald P. Green. 2007. "New Experiments in Minority Voter Mobilization: A Report on the California Votes Initiative" (San Francisco, CA: The James Irvine Foundation). Available at www.irvine.org. 2 In many counties, particularly large ones such as Los Angeles, voting information is not released until several months after an election

From manuscript catalogues to a handbook of Syriac literature: Modeling an infrastructure for Syriaca.org

Despite increasing interest in Syriac studies and growing digital availability of Syriac texts, there is currently no up-to-date infrastructure for discovering, identifying, classifying, and referencing works of Syriac literature. The standard reference work (Baumstark's Geschichte) is over ninety years old, and the perhaps 20,000 Syriac manuscripts extant worldwide can be accessed only through disparate catalogues and databases. The present article proposes a tentative data model for Syriaca.org's New Handbook of Syriac Literature, an open-access digital publication that will serve as both an authority file for Syriac works and a guide to accessing their manuscript representations, editions, and translations. The authors hope that by publishing a draft data model they can receive feedback and incorporate suggestions into the next stage of the project.Comment: Part of special issue: Computer-Aided Processing of Intertextuality in Ancient Languages. 15 pages, 4 figure

New Experiments in Minority Voter Mobilization: A Report on the California Votes Initiative

Evaluates the effectiveness of efforts in California to mobilize voters in communities with significant low-income and minority populations

New Experiments in Minority Voter Mobilization: Third and Final Report on the California Votes Initiative

This report offers new insights about voter mobilization strategies used in our California Votes Initiative. Launched in 2006, the initiative supported nine nonprofit organizations as they reached out to infrequent voters in low-income and ethnic communities in the San Joaquin Valley and parts of Southern California. This publication, the third and final report on the initiative, summarizes findings from the entirety of the project's experiments. It examines the long-term effects of voter mobilization and the effects of specific approaches, such as canvassing and phone calls, on voter attitudes toward politics and political engagement. Qualitative analyses explore the components of a successful get-out-the-vote campaign and identify five practices organizations of many types may use to increase turnout

Correlation analysis of stochastic gravitational wave background around 0.1-1Hz

We discuss prospects for direct measurement of stochastic gravitational wave background around 0.1-1Hz with future space missions. It is assumed to use correlation analysis technique with the optimal TDI variables for two sets of LISA-type interferometers. The signal to noise for detection of the background and the estimation errors for its basic parameters (amplitude, spectral index) are evaluated for proposed missions.Comment: 11 pages, 7 figures, revised version, to appear in PR

Modern Michelson-Morley experiment using cryogenic optical resonators

We report on a new test of Lorentz invariance performed by comparing the resonance frequencies of two orthogonal cryogenic optical resonators subject to Earth's rotation over 1 year. For a possible anisotropy of the speed of light c, we obtain 2.6 +/- 1.7 parts in 10^15. Within the Robertson-Mansouri-Sexl test theory, this implies an isotropy violation parameter beta - delta - 1/2 of -2.2 +/- 1.5 parts in 10^9, about three times lower than the best previous result. Within the general extension of the standard model of particle physics, we extract limits on 7 parameters at accuracies down to a part in 10^15, improving the best previous result by about two orders of magnitude

Potential one-forms for hyperk\"ahler structures with torsion

It is shown that an HKT-space with closed parallel potential 1-form has $D(2,1;-1)$-symmetry. Every locally conformally hyperk\"ahler manifold generates this type of geometry. The HKT-spaces with closed parallel potential 1-form arising in this way are characterized by their symmetries and an inhomogeneous cubic condition on their torsion.Comment: 16 pages, Latex, no figure

Cosmologies with Null Singularities and their Gauge Theory Duals

We investigate backgrounds of Type IIB string theory with null singularities and their duals proposed in hep-th/0602107. The dual theory is a deformed N=4 Yang-Mills theory in 3+1 dimensions with couplings dependent on a light-like direction. We concentrate on backgrounds which become AdS_5 x S^5 at early and late times and where the string coupling is bounded, vanishing at the singularity. Our main conclusion is that in these cases the dual gauge theory is nonsingular. We show this by arguing that there exists a complete set of gauge invariant observables in the dual gauge theory whose correlation functions are nonsingular at all times. The two-point correlator for some operators calculated in the gauge theory does not agree with the result from the bulk supergravity solution. However, the bulk calculation is invalid near the singularity where corrections to the supergravity approximation become important. We also obtain pp-waves which are suitable Penrose limits of this general class of solutions, and construct the Matrix Membrane theory which describes these pp-wave backgrounds.Comment: 43 pages REVTeX and AMSLaTeX. v2: references adde

Robust interferometer for the routing of light beams carrying orbital angular momentum

We have developed an interferometer requiring only minimal angular alignment for the routing of beams carrying orbital angular momentum. The Mach–Zehnder interferometer contains a Dove prism in each arm where each has a mirror plane around which the transverse phase profile is inverted. One consequence of the inversions is that the interferometer needs no alignment. Instead the interferometer defines a unique axis about which the input beam must be coupled. Experimental results are presented for the fringe contrast, reaching a maximum value of 93±1%