Search results for " ANS"

Exact Bethe-ansatz thermodynamics for the sine-Gordon model in the classical limit: Effect of long strings.

1986

Nueua relacion en un curioso romance, que refiere y declara las plausibles y solemnes fiestas reales de toros y cañas, que se delebraron en esta ... …

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Análisis del comportamiento de alumnos expertos resolutores de problemas en el contexto del concurso matemático Pruebas Canguro

2021

Presentamos resultados de una investigación que analiza las estrategias de estudiantes considerados expertos resolutores de problemas en el contexto del concurso Proves Cangur, con problemas de elección múltiple y tiempo limitado para resolverlos. Nuestro objetivo es entender mejor las estrategias de resolución utilizadas, el uso de las opciones de respuesta y cómo afecta el límite de tiempo a sus estrategias de resolución y a su confianza en las respuestas. Los estudiantes han resuelto dos bloques de problemas, uno en las condiciones del concurso y otro sin estos condicionantes. Establecemos una categorización para el grado de certeza que muestran los estudiantes en sus respuestas. No se o…

Sharpness of uniform continuity of quasiconformal mappings onto s-John domains

2017

We construct examples to show the sharpness of uniform continuity of quasiconformal mappings onto $s$-John domains. Our examples also give a negative answer to a prediction in [7].

Asymptotic analysis of the form-factors of the quantum spin chains

2020

Since a long-time, the quantum integrable systems have remained an area where modern mathematical methods have given an access to interesting results in the study of physical systems. The exact computations, both numerical and asymptotic, of the correlation function is one of the most important subject of the theory of the quantum integrable models. In this context an approach based on the calculation of form factors has been proved to be a more effective one. In this thesis, we develop a new method based on the algebraic Bethe ansatz is proposed for the computation of the form-factors in thermodynamic limit. It is applied to and described in the context of isotropic XXX Heisenberg chain, w…

Exact Solution of Quantum Optical Models by Algebraic Bethe Ansatz Methods

1996

From long standing interests in solitons and integrable systems, e.g. SIT (1968– 74)1,2, “optical solitons” CQ04 (1977)3, we solve exactly, by algebraic Bettie ansatz (= quantum inverse) methods4, models of importance to quantum optics including the quantum Maxwell-Bloch envelope equations for plane-wave quantum self-induced transparency (SIT) in one space variable (x) and one time (t)2; and in the one tinte (t)5 a family of models surrounding and extending the Tavis-Cummings model6 of N 2-level atoms coupled to one cavity mode for ideal cavity (Q = ∞) QED. Additional Kerr type nonlinearities or Stark shifted levels can he incorporated into the Hamiltonian H of one of the most general model…

Exercise, Sports & Cardiovascular Health: Relevant Questions and Answers

2019

Introduction Currently, it is quite common for a clinical cardiologist to be questioned about exercise and sports, topics that are rarely discussed during formal medical education. In this regard, there is a clear need to access high-quality data and evidence-based information to give patients and family members the best advice. Aiming to present the state-of-the art scientific information on the topic, we have invited several experts from different countries, all of them “knowledge-producers” in exercise and sports cardiology, to contribute [...]

How to Become a Pediatric Surgeon?

2020

As the title of this chapter already suggests, in this chapter the path of how become a pediatric surgeon is described and important question on this issue are answered. These questions are all dealing with the process and the structure of pediatric surgery training and the requirements which are necessary to become a pediatric surgeon. In preparation of this book chapter, we performed an online survey about the organization and structure of pediatric surgery training around the world. The survey was sent to all official national admissions departments and organizations of pediatric surgery. Thus, data from 28 different countries were compiled. They serve as the basis of some of the questio…

Impact of question-answering tasks on search processes and reading comprehension

2009

Abstract This study examined the effect of (a) high- and low-level questions and (b) reading the text before the questions asked on performance, delayed text recall, and deep text comprehension, as well as on specific text-inspection patterns. Participants were 37 undergraduate students who answered either high- or low-level questions using the software Read&Answer to read and answer questions on the computer screen. Additionally, half of the sample read first a text and then answered the questions (reading-first condition), whereas the other half answered the questions without having read the text in advance (no-reading-first condition). All participants had the text available to search fo…

Bacillus thuringiensis treatment modulate the HSP70 expression in larva and adult brain of Rhynchophorus ferrugineus

2013

To study the pathogen-host relationship, we used the model of the entomopathogenic bacterium Bacillus thuringiensis (Bt) and Rhynchophorus ferrugineus, a quarantine pest that attacks palm trees. In particular, we focused on the Bt stress-induced infections. We studied the effect of Bt on larval and adult growth, and on the expression of the heat shock proteins (HSPs), rapidly synthesized in the cell after exposure to stress including pathogens. Bt has negative effects on larval and adult growth, on total hemocytes counts and on the hemocyte type. HSP70 was evaluated in the supernatant of the brain lysate obtained from larvae and adults fed with sublethal doses of Bt. HSP70 expression was mo…