14,272 research outputs found

    Losing by Degrees: Rising Costs and Public Disinvestment in Higher Education

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    Washington's public colleges and universities are a critical resource for building a prosperous future for our state and fulfilling the promise of opportunity for all. Without strong public institutions of higher education, our youth will be stymied in striving to reach their full potential, and our state will not remain competitive in the global economy. Yet over the past two decades, the state's financial support for higher education has not kept pace with population growth and rising costs. Public institutions differ from private colleges and universities in their commitment to providing access to higher education and improving the well-being of all state residents. The University of Washington, in its statement of values, describes "Being Public" as follows: "As a public university we are deeply committed to serving all our citizens. We collaborate with partners from around the world to bring knowledge and discovery home to elevate the quality of lives of Washingtonians." As centers of education, research, and innovation, public colleges and universities spur economic development throughout the state. Washington's business leaders have long expressed the need for a more highly trained workforce, with more public investment in every level of education, from preschool through graduate study. Governor Christine Gregoire said in her 2009-11 Budget Proposal, "Washington's public colleges and universities are the economic engine that drives the state's economy and will drive our recovery." To build a strong foundation for Washington's future, we must increase public investment in higher education as a part of upgrading our whole public education system. Doing so will require identifying new sources of public revenue

    Production of 92Nb, 92Mo, and 146Sm in the gamma-process in SNIa

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    The knowledge of the production of extinct radioactivities like 92Nb and 146Sm by photodisintegration processes in ccSN and SNIa models is essential for interpreting abundances in meteoritic material and for Galactic Chemical Evolution (GCE). The 92Mo/92Nb and 146Sm/144Sm ratios provide constraints for GCE and production sites. We present results for SNIa with emphasis on nuclear uncertainties.Comment: 6 pages, 4 figures, Proceedings of the 13th Symposium on Nuclei in the Cosmos (NIC XIII), July 2014, Debrecen, Hungar

    Liftable vector fields over corank one multigerms

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    In this paper, a systematic method is given to construct all liftable vector fields over an analytic multigerm f:(Kn,S)→(Kp,0)f: (\mathbb{K}^n, S)\to (\mathbb{K}^p,0) of corank at most one admitting a one-parameter stable unfolding.Comment: 34 pages. In ver. 2, several careless mistakes for calculations in Section 6 were correcte

    Finite N Matrix Models of Noncommutative Gauge Theory

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    We describe a unitary matrix model which is constructed from discrete analogs of the usual projective modules over the noncommutative torus and use it to construct a lattice version of noncommutative gauge theory. The model is a discretization of the noncommutative gauge theories that arise from toroidal compactification of Matrix theory and it includes a recent proposal for a non-perturbative definition of noncommutative Yang-Mills theory in terms of twisted reduced models. The model is interpreted as a manifestly star-gauge invariant lattice formulation of noncommutative gauge theory, which reduces to ordinary Wilson lattice gauge theory for particular choices of parameters. It possesses a continuum limit which maintains both finite spacetime volume and finite noncommutativity scale. We show how the matrix model may be used for studying the properties of noncommutative gauge theory.Comment: 17 pp, Latex2e; Typos corrected, references adde

    Abundance Uncertainties Obtained With the PizBuin Framework For Monte Carlo Reaction Rate Variations

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    Uncertainties in nucleosynthesis models originating from uncertainties in astrophysical reaction rates were estimated in a Monte Carlo variation procedure. Thousands of rates were simultaneously varied within individual, temperature-dependent errors to calculate their combined effect on final abundances. After a presentation of the method, results from application to three different nucleosynthesis processes are shown: the γ\gamma-process and the s-process in massive stars, and the main s-process in AGB stars (preliminary results). Thermal excitation of nuclei in the stellar plasma and the combined action of several reactions increase the final uncertainties above the level of the experimental errors. The total uncertainty, on the other hand, remains within a factor of two even in processes involving a large number of unmeasured rates, with some notable exceptions for nuclides whose production is spread over several stellar layers and for s-process branchings.Comment: 8 pages, 4 figures; Proceedings of OMEG 2017, Daejeon, Korea, June 27-30, 2017; to appear in AIP Conf. Pro

    Systematic study of the SO(10) symmetry breaking vacua in the matrix model for type IIB superstrings

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    We study the properties of the space-time that emerges dynamically from the matrix model for type IIB superstrings in ten dimensions. We calculate the free energy and the extent of space-time using the Gaussian expansion method up to the third order. Unlike previous works, we study the SO(d) symmetric vacua with all possible values of d within the range 2≤d≤72 \le d \le 7, and observe clear indication of plateaus in the parameter space of the Gaussian action, which is crucial for the results to be reliable. The obtained results indeed exhibit systematic dependence on d, which turns out to be surprisingly similar to what was observed recently in an analogous work on the six-dimensional version of the model. In particular, we find the following properties: i) the extent in the shrunken directions is given by a constant, which does not depend on d; ii) the ten-dimensional volume of the Euclidean space-time is given by a constant, which does not depend on d except for d = 2; iii) The free energy takes the minimum value at d = 3. Intuitive understanding of these results is given by using the low-energy effective theory and some Monte Carlo results.Comment: 33 pages, 10 figures; minor corrections, reference added. arXiv admin note: substantial text overlap with arXiv:1007.088

    Non-lattice simulation for supersymmetric gauge theories in one dimension

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    Lattice simulation of supersymmetric gauge theories is not straightforward. In some cases the lack of manifest supersymmetry just necessitates cumbersome fine-tuning, but in the worse cases the chiral and/or Majorana nature of fermions makes it difficult to even formulate an appropriate lattice theory. We propose to circumvent all these problems inherent in the lattice approach by adopting a non-lattice approach in the case of one-dimensional supersymmetric gauge theories, which are important in the string/M theory context.Comment: REVTeX4, 4 pages, 3 figure

    Particle Energization in an Expanding Magnetized Relativistic Plasma

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    Using a 2-1/2-dimensional particle-in-cell (PIC) code to simulate the relativistic expansion of a magnetized collisionless plasma into a vacuum, we report a new mechanism in which the magnetic energy is efficiently converted into the directed kinetic energy of a small fraction of surface particles. We study this mechanism for both electron-positron and electron-ion (mi/me=100, me is the electron rest mass) plasmas. For the electron-positron case the pairs can be accelerated to ultra-relativistic energies. For electron-ion plasmas most of the energy gain goes to the ions.Comment: 7 pages text plus 5 figures, accepted for publication by Physical Review Letter
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