19,076 research outputs found

    Reasons to teach music: establishing a place in the contemporary curriculum

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    Studies in the history of music education reveal much about the place and purpose of music in the changing curriculum. In this article, the ideas of some significant British music educators of the twentieth century are considered, in an evaluation of the apparent goals of music teaching that have been articulated over the decades. The connections between rationale and practice are discussed, with published ideas placed alongside the views of contemporary teachers in a small-scale questionnaire survey. The conclusion is proposed that school music, as a small part of the child's musical identity, must be modest in its intentions but ambitious in its provision

    Prevalence and Evaluation of Bioclimatic Design Techniques used to achieve Low Energy Comfort in Architectural Design Proposals

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    This paper analyses responses of ninety-nine students to a design brief for a public building in different regions of China. The research determined the level of understanding and skills development in students who will be the next generation of building designers, procurers and developers. The students were asked to design in a bioclimatic fashion and therefore to consider the building to be as free running as possible, and thus supportive of adaptive comfort principles. The designed solutions were then analysed to determine: the types of bioclimatic technique chosen to be employed; the actual prevalence of use of the techniques in each case; and the successful implementation within the schemes. The results identify barriers to application in design and define productive areas of future comfort research including analysis of interactions between techniques, and the optimisation of whole building solutions. The adoption of bioclimatic design techniques is complementary to adaptive approaches to thermal comfort and reductions in energy use in buildings

    Book Review: The Age of Sustainable Development, by Jeffrey Sachs

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    Implementation of Diversity Management Programs in Public Organizations: Lessons from Policy Implementation Research

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    The U.S. workforce is becoming more diverse, particularly in the public sector. As a result, a number of public-sector employers have initiated diversity management programs aimed to assist different types of employees in their needs at work. While much of the public administration literature has focused on these programs and what makes them work, it has largely ignored a cognate area of study that has much to say about the success of such programs: the policy implementation literature. This paper uses policy implementation research to develop five guidelines for public managers who wish to develop a successful diversity management initiative. Working Paper 06-1

    Electroweak and B Physics Results from the Fermilab Tevatron Collider

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    This writeup is an introduction to some of the experimental issues involved in performing electroweak and B physics measurements at the Fermilab Tevatron. In the electroweak sector, we discuss W and Z boson cross section measurements as well as the measurement of the mass of the W boson. For B physics, we discuss measurements of B^0/\bar{B^0} mixing and CP violation. This paper is geared towards nonexperts who are interested in understanding some of the issues and motivations for these measurements and how the measurements are carried out.Comment: 42 pages, presented at the 2000 SLAC Summer Institut

    Norming Algebras and Automatic Complete Boundedness of Isomorphisms of Operator Algebras

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    We combine the notion of norming algebra introduced by Pop, Sinclair and Smith with a result of Pisier to show that if A_1 and A_2 are operator algebras, then any bounded epimorphism of A_1 onto A_2 is completely bounded provided that A_2 contains a norming C*-subalgebra. We use this result to give some insights into Kadison's Similarity Problem: we show that every faithful bounded homomorphism of a C*-algebra on a Hilbert space has completely bounded inverse, and show that a bounded representation of a C*-algebra is similar to a *-representation precisely when the image operator algebra \lambda-norms itself. We give two applications to isometric isomorphisms of certain operator algebras. The first is an extension of a result of Davidson and Power on isometric isomorphisms of CSL algebras. Secondly, we show that an isometric isomorphism between subalgebras A_i of C*-diagonals (C_i,D_i) (i=1,2) satisfying D_i \subseteq A_i \subseteq C_i extends uniquely to a *-isomorphism of the C*-algebras generated by A_1 and A_2; this generalizes results of Muhly-Qiu-Solel and Donsig-Pitts.Comment: 9 page

    STRUCTURE FOR REGULAR INCLUSIONS

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    We study pairs (C,D) of unital C∗-algebras where D is an abelian C∗-subalgebra of C which is regular in C in the sense that the span of {v 2 C : vDv∗ [ v∗Dv D} is dense in C. When D is a MASA in C, we prove the existence and uniqueness of a completely positive unital map E of C into the injective envelope I(D) of D whose restriction to D is the identity on D. We show that the left kernel of E, L(C,D), is the unique closed two-sided ideal of C maximal with respect to having trivial intersection with D. When L(C,D) = 0, we show the MASA D norms C in the sense of Pop-Sinclair-Smith. We apply these results to significantly extend existing results in the literature on isometric isomorphisms of norm-closed subalgebras which lie between D and C. The map E can be used as a substitute for a conditional expectation in the construction of coordinates for C relative to D. We show that coordinate constructions of Kumjian and Renault which relied upon the existence of a faithful conditional expectation may partially be extended to settings where no conditional expectation exists. As an example, we consider the situation in which C is the reduced crossed product of a unital abelian C∗-algebra D by an arbitrary discrete group acting as automorphisms of D. We charac- terize when the relative commutant Dc of D in C is abelian in terms of the dynamics of the action of and show that when Dc is abelian, L(C,Dc) = (0). This setting produces examples where no conditional expectation of C onto Dc exists. In general, pure states of D do not extend uniquely to states on C. However, when C is separable, and D is a regular MASA in C, we show the set of pure states on D with unique state extensions to C is dense in D. We introduce a new class of well behaved state extensions, the compatible states; we identify compatible states when D is a MASA in C in terms of groups constructed from local dynamics near an element 2 ˆD. A particularly nice class of regular inclusions is the class of C∗-diagonals; each pair in this class has the extension property, and Kumjian has shown that coordinate systems for C∗-diagonals are particularly well behaved. We show that the pair (C,D) regularly embeds into a C∗-diagonal precisely when the intersection of the left kernels of the compatible states is trivial
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