A Simple Transition-Free Lattice of an 8 Gev Proton Synchrotron

A transition-free lattice is a basic requirement of a high-intensity medium-energy (several GeV) proton synchrotron in order to eliminate beam losses during transition crossing. An 8 GeV synchrotron is proposed as a principal component in an alternative hybrid design of Project-X [1]. This machine would be housed in the Fermilab antiproton source enclosure replacing the present Debuncher. A simple doublet lattice with high transition gamma has been designed. It uses just one type of dipoles and one type of quadrupoles (QF and QD are of the same length). It has no transition crossing. It has a triangular shape with three zero dispersion straight sections, which can be used for injection, extraction, RF and collimators. The beta-functions and dispersion are low. This lattice has plenty of free space for correctors and diagnostic devices, as well as good optical properties including large dynamic aperture, weak dependence of lattice functions on amplitude and momentum deviation.Comment: 3 pages, 2 figures, presentation at the 2009 Particle Accelerator Conference PAC0

On integrability of one third-order nonlinear evolution equation

We study one third-order nonlinear evolution equation, recently introduced by Chou and Qu in a problem of plane curve motions, and find its transformation to the modified Korteweg - de Vries equation, its zero-curvature representation with an essential parameter, and its second-order recursion operator.Comment: 10 page

Improved Chou-Fasman method for protein secondary structure prediction

BACKGROUND: Protein secondary structure prediction is a fundamental and important component in the analytical study of protein structure and functions. The prediction technique has been developed for several decades. The Chou-Fasman algorithm, one of the earliest methods, has been successfully applied to the prediction. However, this method has its limitations due to low accuracy, unreliable parameters, and over prediction. Thanks to the recent development in protein folding type-specific structure propensities and wavelet transformation, the shortcomings in Chou-Fasman method are able to be overcome. RESULTS: We improved Chou-Fasman method in three aspects. (a) Replace the nucleation regions with extreme values of coefficients calculated by the continuous wavelet transform. (b) Substitute the original secondary structure conformational parameters with folding type-specific secondary structure propensities. (c) Modify Chou-Fasman rules. The CB396 data set was tested by using improved Chou-Fasman method and three indices: Q3, Qpre, SOV were used to measure this method. We compared the indices with those obtained from the original Chou-Fasman method and other four popular methods. The results showed that our improved Chou-Fasman method performs better than the original one in all indices, about 10–18% improvement. It is also comparable to other currently popular methods considering all the indices. CONCLUSION: Our method has greatly improved Chou-Fasman method. It is able to predict protein secondary structure as good as current popular methods. By locating nucleation regions with refined wavelet transform technology and by calculating propensity factors with larger size data set, it is likely to get a better result

‘I’m ugly, but gentle’: performing ‘little character’ in post-Mao Chinese comedies

Stars are often associated with glamour and beauty, but in this paper I would like to question how the concept of “chou” (literally meaning ugliness) is embraced in contemporary Chinese cinema. The popularity of chouxing (ugly star) in the Chinese cinema since the late 1980s has challenged the star system in Chinese film industry during the previous decades when a male actor’s handsome appearance was regarded as an important criterion for him being cast as a leading man. Directing the public attention to a male star’s physical appearance by stressing the attributive adjective chou, this newly-coined word raises a question: how the cinematic emphasis on a male star’s physical appearance engages with the social construction of a star’s screen charisma under the transnational context? To answer the question, this article takes Ge You (b.1957) as a case study and explores the star’s impersonation of xiao renwu (little character) in Chinese comedies. I argue that the Chinese cinema’s emphasis of a chouxing’s physical appearance is a visual manifest of the character’s imperfectness and ordinariness. Nonetheless, despite the fact that the cinematic emphasis of the star’s unattractive appearance often signifies a little character’s unprivileged social status, it neither marginalises nor makes the character a social outsider. Instead, the imperfectness and ordinariness has endowed the little character with the power as an insider of the Chinese society

A Festival of Fortepiano, February 28, 1994

This is the concert program of the A Festival of Fortepiano performance on Monday, February 28, 1994 at 8:00 p.m., at the Tsai Performance Center, 685 Commonwealth Avenue. Works performed were Sonata for Violin and Piano in D major, K. 306 by Wolfgang Amadeus Mozart, Adagio and Scherzo from "Drei Klavierstücke," D. 459A by Franz Schubert, "Liebesbotschaft," "Am Meer," "Ständchen," and "Ihr Bild" by F. Schubert, Sonata in F major for Piano, H. XVI/23 by Franz Joseph Haydn, and Sonata for Two Pianos, K. 448 by W. A. Mozart. Digitization for Boston University Concert Programs was supported by the Boston University Humanities Library Endowed Fund

Ground states of a one-dimensional lattice-gas model with an infinite range nonconvex interaction. A numerical study

We consider a lattice-gas model with an infinite range pairwise noncovex interaction. It might be relevant, for example, for adsorption of alkaline elements on W(112) and Mo(112). We study a competition between the effective dipole-dipole and indirect interactions. The resulting ground state phase diagrams are analysed (numerically) in detail. We have found that for some model parameters the phase diagrams contain a region dominated by several phases only with periods up to nine lattice constants. The remaining phase diagrams reveal a complex structure of usually long periodic phases. We also discuss a possible role of surace states in phase transitions.Comment: 16 pages, 5 Postscript figures; Physical Review B15 (15 August 1996), in pres