Changing the Tide: An Internet/Video Exercise and Low Fat Diet Intervention with Middle School Students

The rising tide of obesity erodes the health of youths and many times results in adult obesity. The purpose of this investigation was to examine the effectiveness of an eight-session health promotion/transtheoretical model Internet/video-delivered intervention to increase physical activity and reduce dietary fat among low-income, culturally diverse, seventh-grade students. Those who completed more than half the sessions increased exercise, t(103) = −1.99, p = .05, and decreased the percentage of dietary fat, t(87) = 2.73, p = .008. Responses to the intervention by stage of change, race, and income are examined

Trends in Expenses and Revenues at Not-for-profit and For-profit Postsecondary Institutions: The Nondistribution Constraint and the Future of the Trust Market

In the United States, every child has the right to an education and is required by law to attend school. The government provides an enormous number of public schools throughout the country, free of charge, in order to ensure education for all, yet there are families who choose to homeschool their children instead. Hill (2010) explains that “homeschooling is not a new phenomenon. In colonial days families, including wealthy ones, educated their children at home, combining the efforts of parents, tutors, and older children” (p.1). He goes on to mention how colonial rural one-room schoolhouses provided a place for the children of several families to study together under the direction of a teacher who implemented their personal program of instruction

Disentangling the Origin and Heating Mechanism of Supernova Dust: Late-Time Spitzer Spectroscopy of the Type IIn SN 2005ip

This paper presents late-time near-infrared and {\it Spitzer} mid-infrared photometric and spectroscopic observations of warm dust in the Type IIn SN 2005ip in NGC 2906. The spectra show evidence for two dust components with different temperatures. Spanning the peak of the thermal emission, these observations provide strong constraints on the dust mass, temperature, and luminosity, which serve as critical diagnostics for disentangling the origin and heating mechanism of each component. The results suggest the warmer dust has a mass of $\sim 5 \times 10^{-4}~$\msolar, originates from newly formed dust in the ejecta, or possibly the cool, dense shell, and is continuously heated by the circumstellar interaction. By contrast, the cooler component likely originates from a circumstellar shock echo that forms from the heating of a large, pre-existing dust shell $\sim 0.01 - 0.05$~\msolar~by the late-time circumstellar interaction. The progenitor wind velocity derived from the blue edge of the He 1 1.083 \micron~P Cygni profile indicates a progenitor eruption likely formed this dust shell $\sim$100 years prior to the supernova explosion, which is consistent with a Luminous Blue Variable (LBV) progenitor star.Comment: 12 pages, 10 figures, Accepted to Ap

SLIDES: Taking the Long View: Doing Something About Climate Change

Presenter: Maggie Fox, President, America Votes, Boulder, CO. Presenter: Susan Avery, Interim Provost and Executive Vice-Chancellor for Academic Affairs, University of Colorado. Presenter: Roger Pielke, Jr., Professor, Environmental Studies, Center for Science and Technology Policy Research, University of Colorado. 4 slides

Press-fit hinge and magnesium alloy enclosure for laptop cover attachment

Computing devices such as laptops utilize hinges to connect the lid of the device to its base. This disclosure describes a press-fit hinge mechanism for use in conjunction with magnesium alloy based enclosures that are utilized to attach a computing device lid to its base. The press-fit hinge mechanism includes a knurled shaft designed to be inserted into a magnesium alloy based enclosure. The teeth and lead-in chamfer geometry of the knurled shaft are designed to control the interference between the knurls and enclosure opening. A straight knurl pattern is utilized for ease of manufacture, and provides for better material flow via ridges of the knurled shaft, a lower insertion force, and a higher torsional resistance. The press-fit hinge mechanism enables tighter assembly tolerances, smaller assembly gaps and improved appearance for the device

X-ray Emission from SN 2012ca: A Type Ia-CSM Supernova Explosion in a Dense Surrounding Medium

X-ray emission is one of the signposts of circumstellar interaction in supernovae (SNe), but until now, it has been observed only in core-collapse SNe. The level of thermal X-ray emission is a direct measure of the density of the circumstellar medium (CSM), and the absence of X-ray emission from Type Ia SNe has been interpreted as a sign of a very low density CSM. In this paper, we report late-time (500--800 days after discovery) X-ray detections of SN 2012ca in {\it Chandra} data. The presence of hydrogen in the initial spectrum led to a classification of Type Ia-CSM, ostensibly making it the first SN~Ia detected with X-rays. Our analysis of the X-ray data favors an asymmetric medium, with a high-density component which supplies the X-ray emission. The data suggest a number density $> 10^8$ cm$^{-3}$ in the higher-density medium, which is consistent with the large observed Balmer decrement if it arises from collisional excitation. This is high compared to most core-collapse SNe, but it may be consistent with densities suggested for some Type IIn or superluminous SNe. If SN 2012ca is a thermonuclear SN, the large CSM density could imply clumps in the wind, or a dense torus or disk, consistent with the single-degenerate channel. A remote possibility for a core-degenerate channel involves a white dwarf merging with the degenerate core of an asymptotic giant branch star shortly before the explosion, leading to a common envelope around the SN.Comment: 11 pages, 4 figures. Accepted to MNRA

Data for the Desert Citrus Industry

This item is part of the Agricultural Experiment Station archive. It was digitized from a physical copy provided by the University Libraries at the University of Arizona. For more information, please email CALS Publications at [email protected]

Effects of Praise and Reproof on Digit-symbol Learning at the Elementary School Level

The principle problem of the present research was to determine the relative effects of two major variables, nature of verbal reinforcement and achievement history, upon the performance of elementary school children on a relatively simple learning task

Implementing tradable permits for sulfur oxides emissions : a case study in the South Coast Air Basin

Tradable emissions permits have important theoretical advantages over source-specific technical standards as a means for controlling pollution. Nonetheless, difficulties can arise in trying to implement an efficient, competitive market in emissions permits. Simple workable versions of the market concept may fail to achieve the competitive equilibrium, or to take account of important complexities in the relationship between the pattern of emissions and the geographical distribution of pollution. Existing regulatory law may severely limit the range of market opportunities that states can adopt. This report examines the feasibility of tradable permits for controlling particulate sulfates in the Los Angeles airshed. Although the empirical part of the paper deals with a specific case, the methods developed have general applicability. Moreover, the particular market design that is proposed -- an auction process that involves no net revenue collection by the state -- has attractive features as a general model