Pacemapping

Pacemapping (PM) is an electrophysiologic technique designed to help locating tachycardia sources by stimulating at different endocardial sites in order to reproduce the clinical tachycardia characteristics. A recorded electrocardiogram (ECG) during the clinical tachycardia has been conventionally used as reference. Yet, endocardial activation pattern during tachycardia may be utilized as well to guide the procedure. In focal tachycardia ablation, PM guide has consistently provided remarkable outcomes1, while outcomes in reentrant tachycardia ablation are less favourabl

States Rise to the Front of Climate Legislation, but Can a State-Level Carbon Tax Work?

This Note uses two recent Massachusetts carbon tax proposals to discuss the costs and benefits of such state-level climate change legislation but discusses similar regional proposals as well. Although a state carbon tax poses some limitations and concern for the increased tax burden relative to other states that have not imposed a tax, the adoption of state carbon taxes represents an important advancement in climate policy. Part I overviews legislative tactics used to combat climate change thus far, including common policy responses, and the current attitude of federal legislators toward the global climate crisis. Part II introduces the advantages and common criticisms of a carbon tax policy and concludes that a carbon tax would be an effective policy option. Next, Part III discusses recent state carbon tax proposals, focusing on the efforts of northeastern states to enact the nation’s first carbon tax law. Two Massachusetts proposals, Senate Bill 1821 and House Bill 1726, are introduced to provide the basis for an analysis of state carbon taxes. Finally, Part IV discusses the possibility of effective state-level climate change policy and analyzes the costs and benefits of the Massachusetts state proposals. This Note argues that states, especially population-dense states such as Massachusetts, should adopt state-level carbon taxes to reduce their respective share of carbon emissions and supply momentum to the climate change movement

Mark D. Anderson. Disaster Writing: The Cultural Politics of Catastrophe in Latin America. Charlottesville: U of Virginia P, 2011. 241 pp.

Review of Mark D. Anderson. Disaster Writing: The Cultural Politics of Catastrophe in Latin America. Charlottesville: U of Virgina P, 2011. 241 pp

Telephone-Delivered Cognitive Behavioral Therapy for Insomnia in Patients with Cancer: A Randomized Controlled Trial

This study examined the efficacy and feasibility of a brief telephone-delivered CBT-I (TeleCBT-I) intervention in cancer patients compared to a control group. The study used a randomized controlled trial design. The TeleCBT-I program consisted of a brief four-week CBT-I program adapted for cancer patients. Patients completed assessment measures at pre-treatment, post-treatment and one-month follow-up. Out of 184 patients screened, 39 were randomly assigned, and 35 (TeleCBT-I, n = 19; Control, n = 16) completed pre- and post-treatment measures and were included in the analyses. Compared to control group, the TeleCBT-I group reported decreased insomnia severity symptoms (p \u3c .014), improved sleep quality (p \u3c .023), and reduced dysfunctional beliefs about sleep (p = .039) at post-treatment with sustained treatment effects at one-month follow-up. Sleep measures yielded large effect sizes (Hedges\u27 g, 0.84-2.7). Although the TeleCBT-I group indicated improvements in fatigue, general functioning, physical well-being, functional well-being, and physical quality of life, effects at follow-up were observed only for fatigue, functional well-being and physical quality of life. No effects were found on depression at any of the time points. In terms of feasibility, TeleCBT-I demonstrated high adherence, high homework completion and high overall satisfaction. These results advance the empirical evidence of CBT-I in cancer patients and support the use of telephone-delivered CBT-I to widely disseminate and implement among patients with cancer

Nonexistence of conformally flat slices of the Kerr spacetime

Initial data for black hole collisions are commonly generated using the Bowen-York approach based on conformally flat 3-geometries. The standard (constant Boyer-Lindquist time) spatial slices of the Kerr spacetime are not conformally flat, so that use of the Bowen-York approach is limited in dealing with rotating holes. We investigate here whether there exist foliations of the Kerr spacetime that are conformally flat. We limit our considerations to foliations that are axisymmetric and that smoothly reduce in the Schwarzschild limit to slices of constant Schwarzschild time. With these restrictions, we show that no conformally flat slices can exist.Comment: 5 LaTeX pages; no figures; to be submitted to Phys. Rev.

Mathematical Magic: A Study of Number Puzzles

Within this paper, we will briefly review the history of a collection of number puzzles which take the shape of squares, polygons, and polyhedra in both modular and nonmodular arithmetic. Among other results, we develop construction techniques for solutions of both Modulo and regular Magic Squares. For other polygons in nonmodular arithmetic, specifically of order 3, we present a proof of why there are only four Magic Triangles using linear algebra, disprove the existence of the Magic Tetrahedron in two ways, and utilizing the infamous 3-SUM combinatorics problem we disprove the existence of the Magic Octahedron

Coordination Compounds of Alkali Metal Halides and Racemic Diaryl Diamines

Solid alkali metal coordination compounds of water soluble alkali metal salts of monobasic acids and racemic diamines are made by contacting an aqueous solution of the alkali metal salts with a solution of a racemic diamine compound of the formula wherein Ar in an aryl ring, X is alkyl and Y is alkyl or hydrogen, the X\u27s being different from the Y\u27s. The formation of the new coordination compounds provides a method for separation of alkali metal from alkaline earth metals