Policies and People: A Review of Neoliberalism and Educational Technologies in P-12 Education Research

Accountability regimes, value added, vouchers—it is difficult to ignore the evidence of market-based rationalities in global discourses around education. Such rationalities rely heavily on Information and Communications Technologies (ICTs) for their propagation and maintenance under the guise of educational technologies, or ed-tech. The purpose of this literature review is to examine educational research focused on the role ICTs have played in the neoliberalization of education across the globe. The author contends that future inquiry needs to substantiate the broad claims about the pernicious effects of neoliberalized educational technologies by engaging more directly with those most affected: teachers and students

Spontaneous Breaking of Gauge Groups to Discrete Symmetries

Many models of beyond Standard Model physics connect flavor symmetry with a discrete group. Having this symmetry arise spontaneously from a gauge theory maintains compatibility with quantum gravity and can be used to systematically prevent anomalies. We minimize a number of Higgs potentials that break gauge groups to discrete symmetries of interest, and examine their scalar mass spectra.Comment: 45 page

Federal Minimum Wage, Tax-Transfer Earnings Supplements, and Poverty

[Excerpt] This report focuses on the impact of minimum wage and tax-transfer earnings supplements for workers of different family types. It does so through illustrating how the minimum wage and federal tax-transfer policies affect the income of a minimum wage worker who works full-time, full-year in four different family types: a single childless worker; a worker supporting a married couple; a single mother with two children; and a married couple with two children. These family types are chosen to highlight the different treatment federal tax-transfer policies have on workers of different family types. They were not chosen as representative of most minimum wage workers. The illustrations show the impact of policies on two childless workers—one married, one not. They also show the impact of two workers with children—one married, one not. The report highlights how policies differ between families with children, and families without children. This report supplements these illustrations with some background on policies, as well as some policy considerations that apply generally to debates on the minimum wage and tax-transfer policies. Full-year, full-time work at the minimum wage is not common. In 2012, 32% of workers earning the minimum wage worked full-time. Again, the illustrations were not chosen to be representative of most minimum wage workers. Full-time, full-year work was chosen for illustrative purposes. Additionally, the income produced by full-time, full year work at the minimum wage is an important policy benchmark, as it reflects the federally-determined minimum income for someone with full-time involvement in the labor force. This report • describes current law minimum wage and tax-transfer earnings supplement policies; • provides the illustrations of gross earnings and net income (after taxes and SNAP benefits) for full-time full-year minimum wage workers at both the current minimum wage ($7.25 per hour) and the proposed$10.10 minimum wage; and • discusses some of the policy implications of addressing poverty through both the minimum wage and federally-funded earnings supplements

The Cepheid Distance Scale: recent progress in fundamental techniques

This review examines progress on the Pop I, fundamental-mode Cepheid distance scale with emphasis on recent developments in geometric and quasi-geometric techniques for Cepheid distance determination. Specifically I examine the surface brightness method, interferometric pulsation method, and trigonometric measurements. The three techniques are found to be in excellent agreement for distance measures in the Galaxy. The velocity p-factor is of crucial importance in the first two of these methods. A comparison of recent determinations of the p-factor for Cepheids demonstrates that observational measures of p and theoretical predictions agree within their uncertainties for Galactic Cepheids.Comment: An invited review at the Santa Fe, NM, conference -- Stellar Pulsation: Challenges for Theory and Observation; May 31-June 5, 2009 10 pages, 8 figure

Consistency in statistical moments as a test for bubble cloud clustering

Frequency dependent measurements of attenuation and/or sound speed through clouds of gas bubbles in liquids are often inverted to find the bubble size distribution and the void fraction of gas. The inversions are often done using an effective medium theory as a forward model under the assumption that the bubble positions are Poisson distributed (i.e., statistically independent). Under circumstances in which single scattering does not adequately describe the pressure field, the assumption of independence in position can yield large errors when clustering is present, leading to errors in the inverted bubble size distribution. It is difficult, however, to determine the existence of clustering in bubble clouds without the use of specialized acoustic or optical imaging equipment. A method is described here in which the existence of bubble clustering can be identified by examining the consistency between the first two statistical moments of multiple frequency acoustic measurements

An Estimate of the Gas Transfer Rate from Oceanic Bubbles Derived from Multibeam Sonar Observations of a Ship Wake

Measurements of gas transfer rates from bubbles have been made in the laboratory, but these are difficult to extrapolate to oceanic bubbles where populations of surfactants and particulate matter that inhibit gas transfer are different. Measurements at sea are complicated by unknown bubble creation rates that make it difficult to uniquely identify and observe the evolution of individual bubble clouds. One method that eliminates these difficulties is to measure bubbles in a ship wake where bubble creation at any given location is confined to the duration of the passing ship. This method assumes that the mechanisms slowing the gas dissolution of naturally created bubbles act in a similar manner to slow the dissolution of bubbles in a ship wake. A measurement of the gas transfer rate for oceanic bubbles using this method is reported here. A high-frequency upward-looking multibeam echosounder was used to measure the spatial distribution of bubbles in the wake of a twin screw 61-m research vessel. Hydrodynamic forcing functions are extracted from the multibeam data and used in a bubble cloud evolution model in which the gas transfer rate is treated as a free parameter. The output of model runs corresponding to different gas transfer rates is compared to the time-dependent wake depth observed in the data. Results indicating agreement between the model and the data show that the gas transfer rate must be approximately 15 times less then it would be for surfactant-free bubbles in order to explain the bubble persistence in the wake

The Use of Multi-beam Sonars to Image Bubbly Ship Wakes

During the past five years, researchers at Penn State University (PSU) have used upward-looking multi-beam (MB) sonar to image the bubbly wakes of surface ships. In 2000, a 19-beam, 5° beam width, 120° sector, 250 kHz MB sonar integrated into an autonomous vehicle was used to obtain a first-of-a-kind look at the three-dimensional variability of bubbles in a large ship wake. In 2001 we acquired a Reson 8101 MB sonar, which operates at 240 kHz and features 101-1.5º beams spanning a 150º sector. In July 2002, the Reson sonar was deployed looking upward from a 1.4 m diameter buoy moored at 29.5 m depth in 550 m of water using three anchor lines. A fiber optic cable connected the sonar to a support ship 500 m away. Images of the wake of a small research vessel provided new information about the persistence of bubble clouds in the ocean. An important goal is to use the MB sonar to estimate wake bubble distributions, as has been done with single beam sonar. Here we show that multipath interference and strong, specular reflections from the sea surface adversely affect the use of MB sonars to unambiguously estimate wake bubble distributio