Carbon dioxide concentrator

Passed exhaled air through electrochemical cell containing alkali metal carbonate aqueous solution, and utilizes platinized electrodes causing reaction of oxygen at cathode with water in electrolyte, producing hydroxyl ions which react with carbon dioxide to form carbonate ions

N=2 Einstein-Yang-Mills's BPS solutions

We find the general form of all the supersymmetric configurations and solutions of N=2,d=4 Einstein-Yang-Mills theories. In the timelike case, which we study in great detail, giving many examples, the solutions to the full supergravity equations can be constructed from known flat spacetime solutions of the Bogomol'nyi equations. This allows the regular supersymmetric embedding in supergravity of regular monopole solutions ('t Hooft-Poyakov's, Weinberg's, Wilkinson and Bais's) but also embeddings of irregular solutions to the Bogomol'nyi equations which turn out to be regular black holes with different forms of non-Abelian hair once the non-triviality of the spacetime metric is taken into account. The attractor mechanism is realized in a gauge-covariant way. In the null case we determine the general equations that supersymmetric configurations and solutions must satisfy but we do not find relevant new supersymmetric solutions.Comment: latex2e, 53 pages, 2 figure

On the existence of dyons and dyonic black holes in Einstein-Yang-Mills theory

We study dyonic soliton and black hole solutions of the ${\mathfrak {su}}(2)$ Einstein-Yang-Mills equations in asymptotically anti-de Sitter space. We prove the existence of non-trivial dyonic soliton and black hole solutions in a neighbourhood of the trivial solution. For these solutions the magnetic gauge field function has no zeros and we conjecture that at least some of these non-trivial solutions will be stable. The global existence proof uses local existence results and a non-linear perturbation argument based on the (Banach space) implicit function theorem.Comment: 23 pages, 2 figures. Minor revisions; references adde

Superfield equations for the interacting system of D=4 N=1 supermembrane and scalar multiplet

We present the superfield action for the dynamical N=1 D=4 supermembrane in interaction with a dynamical scalar multiplet and use it to derive the superfield equations of motion. These include the supermembrane equations, which formally coincide with equations of supermembrane in a background of the (off-shell) scalar multiplet, and the special chiral superfield equations with supermembrane source. In the case when the scalar supermultiplet part of the action contains only the simplest kinetic term we have also extracted the spacetime component field equations from the superfield equations and solve these in the leading order on supermembrane tension. The inclusion of nontrivial superpotential and relation with known supersymmetric domain wall solutions is briefly discussed.Comment: 26 pages. V2: misprints corrected, references and an acknowledgment added, minor changes, in particular in sec. 4.2.1. V.3. discussion on the relation with known solutions added; to appear in Nucl.Phys. B (2011

Invoking the modal nymph: The emergence and dissemination of the concept of modality in Swedish folk music

Since the emergence of a concept of folk music, the study and practice of certain Western European musical traditions has been informed by notions of the music’s modality. Specifically, the idea that older or more indigenous layers of traditional repertoires manifest an underlying, pre-tonal structure of their own has been significant in scholarship, musical education, and performance. This study seeks to shed light on this idea through the particular case of the conceptualisation of modality in relation to Swedish folk music. It asks what music-theoretical ideas on modality have risen through various scholarly and editorial endeavours, how these ideas have emerged, and in what shape they have been further disseminated in contemporary research and education. It addresses these questions by tracing the history of the modal discourse about Swedish folk music at two of its main stages: its inception and formation throughout the 19th century, and the establishment of a consensus around it from the late 1970s onwards. Through close readings of a wide selection of sources, the study offers an analysis of the ensuing concept of modality from a critical, historically informed, music-theoretical perspective. Looking at modality as an open concept, it proposes that the concept of modality that has been attributed to Swedish folk music concurs with a specific type of romanticist, neo-modal construction, in which scale-degree theory gives rise to dichotomous, evolutionist and organological definitions of mode as a marker of “musical otherness”. The study further explores the emergent aspect of this construction, as well as its projective and regulative force on the analysis and assessment of traditional repertoires

The Tensor Hierarchies of Pure N=2,d=4,5,6 Supergravities

We study the supersymmetric tensor hierarchy of pure (gauged) N=2,d=4,5,6 supergravity and compare them with those of the pure, ungauged, theories (worked out by Gomis and Roest for d=5) and the predictions of the Kac-Moody approach made by Kleinschmidt and Roest. We find complete agreement in the ungauged case but we also find that, after gauging, new Stueckelberg symmetries reduce the number of independent "physical" top-forms. The analysis has to be performed to all orders in fermion fields. We discuss the construction of the worldvolume effective actions for the p-branes which are charged with respect to the (p+1)-form potentials and the relations between the tensor hierarchies and p-branes upon dimensional reduction.Comment: LaTeX2e file, 20 pages, 1 figure Results refined by extension of the analysis to all orders in fermion