Observation of B0→D+D−B^0 \to D^+ D^-, B−→D0D−B^- \to D^0 D^- and B−→D0D∗−B^- \to D^0 D^{*-} decays

We report the first observation of the decay modes $B^0 \to D^+ D^-$, $B^- \to D^0 D^-$ and $B^- \to D^0 D^{*-}$ based on 152 $\times$ 10$^6$ $B\bar{B}$ events collected at KEKB. The branching fractions of $B^0 \to D^+ D^-$, $B^- \to D^0 D^-$ and $B^- \to D^0 D^{*-}$ are found to be $(3.21 \pm 0.57 \pm 0.48) \times 10^{-4}$, $(5.62 \pm 0.82 \pm 0.65) \times 10^{-4}$ and $(4.59 \pm 0.72 \pm 0.56) \times 10^{-4}$, respectively. Charge asymmetries in the $B^- \to D^0 D^-$ and $B^- \to D^0 D^{*-}$ channels are consistent with zero.Comment: 9 pages, 2 figures, KEK Preprint 2004-99, Belle Prerpint 2005-3, submitted to PR

Dynamic Geospatial Spectrum Modelling: Taxonomy, Options and Consequences

Much of the research in Dynamic Spectrum Access (DSA) has focused on opportunistic access in the temporal domain. While this has been quite useful in establishing the technical feasibility of DSA systems, it has missed large sections of the overall DSA problem space. In this paper, we argue that the spatio-temporal operating context of specific environments matters to the selection of the appropriate technology for learning context information. We identify twelve potential operating environments and compare four context awareness approaches (on-board sensing, databases, sensor networks, and cooperative sharing) for these environments. Since our point of view is overall system cost and efficiency, this analysis has utility for those regulators whose objectives are reducing system costs and enhancing system efficiency. We conclude that regulators should pay attention to the operating environment of DSA systems when determining which approaches to context learning to encourage

DYNAMITE: ANARCHISM, MODERNISM, AESTHETICS

This book argues for the intersection of anarchist theory, modernist writers, and aesthetic innovations under the sign of "the bomb." Individual chapters concern such figures as Joseph Conrad, Richard Wagner, Henry Adams, Andrei Bely, Edna St. Vincent Millay, Upton Sinclair, John Dos Passos, and Katherine Ann Porter, as well as collectivities like the Surrealists and the Dadaists. Anarchists such as Peter Kropotkin, Emma Goldman, and Michael Bakunin are also important to the text. The original version of this text was produced as a dissertation at the University of California Berkeley. Committee members were Carolyn Porter, Ann Banfield, and the late Michael Rogin. Three chapters--those on Conrad, Wagner, and the Sacco-Vanzetti case--were published in refereed academic journals. A synopsis of the argument was published in The Turn of the Century, Walter Pape, editor (Berlin and New York: Walter de Gruyter) 1995. Dynamite had been approved for publication in the Atopia series of Stanford University Press when major changes at the press resulted in the abolition of the series

Review -- The Palmetto State’s Memory: A History of the South Carolina Department of Archives & History, 1905-1960

A critical review of the book, "The Palmetto State's Memory: A History of the South Carolina Department of Archives and History 1905-1960," by Charles H. Lesser, is presented

D^0-D^0bar mixing in \Upsilon(1S) \to D^0 D^0bar decay at Super-B

\Dz-\Dzb mixing and significant CP violation in the charm system may indicate the signature of new physics. In this study, we suggest that the coherent \DzDzb events from the decay of \Upsilon(1S) \to \Dz \Dzb can be used to measure both mixing parameters and CP violation in charm decays. The neutral $D$ mesons from $\Upsilon(1S)$ decay are strongly boosted, so that it will offer the possibility to measure the proper-time interval, $\Delta t$, between the fully-reconstructed \Dz and \Dzb. Both coherent and time-dependent information can be used to extract \Dz-\Dzb mixing parameters. The sensitivity of the measurement should be improved at B factories or super-B.Comment: 6 pages, 1 figure, this is the last version to appear in Phys. Rev.

B0→D0Dˉ0K0B^0 \to D^0 \bar D^0 K^0, B+→D0Dˉ0K+B^+ \to D^0 \bar D^0 K^+ and the scalar DDˉD \bar D bound state

We study the $B^0$ decay to $D^0 \bar D^0 K^0$ based on the chiral unitary model that generates the X(3720) resonance, and make predictions for the $D^0 \bar D^0$ invariant mass distribution. From the shape of the distribution, the existence of the resonance below threshold could be induced. We also predict the rate of production of the X(3720) resonance to the $D^0 \bar D^0$ mass distribution with no free parameters.Comment: 9 pages, 17 figure

DD-Dimensional Gravity from (D+1)(D+1) Dimensions

We generalise Wesson's procedure, whereby vacuum $(4+1)-$dimensional field equations give rise to $(3+1)-$dimensional equations with sources, to arbitrary dimensions. We then employ this generalisation to relate the usual $(3+1)-$dimensional vacuum field equations to $(2+1)-$dimensional field equations with sources and derive the analogues of the classes of solutions obtained by Ponce de Leon. This way of viewing lower dimensional gravity theories can be of importance in establishing a relationship between such theories and the usual 4-dimensional general relativity, as well as giving a way of producing exact solutions in $(2+1)$ dimensions that are naturally related to the vacuum $(3+1)-$dimensional solutions. An outcome of this correspondence, regarding the nature of lower dimensional gravity, is that the intuitions obtained in $(3+1)$ dimensions may not be automatically transportable to lower dimensions. We also extend a number of physically motivated solutions studied by Wesson and Ponce de Leon to $(D+1)$ dimensions and employ the equivalence between the $(D+1)$ Kaluza-Klein theories with empty $D-$dimensional Brans-Dicke theories (with $\omega=0$) to throw some light on the solutions derived by these authors.Comment: 11 pages, latex, published in CQG vol. 12 no. 1

Study of the Decays B0 --> D(*)+D(*)-

The decays B0 --> D*+D*-, B0 --> D*+D- and B0 --> D+D- are studied in 9.7 million Y(4S) --> BBbar decays accumulated with the CLEO detector. We determine Br(B0 --> D*+D*-) = (9.9+4.2-3.3+-1.2)e-4 and limit Br(B0 --> D*+D-) < 6.3e-4 and Br(B0 --> D+D-) < 9.4e-4 at 90% confidence level (CL). We also perform the first angular analysis of the B0 --> D*+D*- decay and determine that the CP-even fraction of the final state is greater than 0.11 at 90% CL. Future measurements of the time dependence of these decays may be useful for the investigation of CP violation in neutral B meson decays.Comment: 21 pages, 5 figures, submitted to Phys. Rev.

E-Scripture: The Impact of Technology on the Reading of Sacred Texts (2013)

The tradition of religious readers in transition is not new: Augustine expressed “amazement” that Ambrose read silently and not aloud, movable type in the fifteenth century made the Bible publishable without scribal work, and today, electronic pages have become interactive in ways scarcely imagined a short time ago. How readers of today imagine a page (now conceptualized as a ‘web-page’) and consequently, reading in general, has profound implications for the 21st century. Acknowledging the fact that “the significance of a religious book lies not only in the message of its content, but also in the form and self-presentation with which it makes itself available to worship and transmission,” this project assumes that a great deal of perspective is provided by looking at this current transition in light of the old. In virtually all previous reading transitions, a religious ‘pattern of reading technology’ can be seen, whose pieces are all well-known but have not been collectively applied to the current situation of e-reading. The pattern operates with a three part assumption: readers will initially use a new technology to perform the same functions as the old technology, only more quickly, with more efficiency, or in greater quantity. This early use of new reading technology, in other words, largely attempts to imitate the functions and appearance of the old format. The second part is that the old technology becomes sacralized or ritualized in the face of the new technology’s standardization. As this standardization occurs, the new technology develops its own unique and innovative functions, exclusive to that form and shedding some or most of the imitative appearance and functions of the old technology – the third part of the pattern. Reviewing these transitions of the past and present, it becomes clear that perhaps fear of the new technology – however relatable – proves somewhat unfounded. New reading technology does not prove ultimately inimical to the old formats, or to religion, and despite many initial practical concerns, actually provides a multitude of benefits in the reading of sacred texts