Analytical expressions of 3 and 4-loop sunrise Feynman integrals and 4-dimensional lattice integrals

In this paper we continue the work begun in 2002 on the identification of the analytical expressions of Feynman integrals which require the evaluation of multiple elliptic integrals. We rewrite and simplify the analytical expression of the 3-loop self-mass integral with three equal masses and on-shell external momentum. We collect and analyze a number of results on double and triple elliptic integrals. By using very high-precision numerical fits, for the first time we are able to identify a very compact analytical expression for the 4-loop on-shell self-mass integral with 4 equal masses, that is one of the master integrals of the 4-loop electron g-2. Moreover, we fit the analytical expressions of some integrals which appear in lattice perturbation theory, and in particular the 4-dimensional generalized Watson integral.Comment: 13 pages, 1 figure, LaTex; v2: some rephrasing of text; v3: reference added, minor modifications; v4: checks of lattice integrals up to 2400 digits; some modifications of text; version accepted for publication in IJMPA, needs the document class ws-ijmpa.cl

Bench-to-bedside review: Dealing with increased intensive care unit staff turnover: a leadership challenge

Critical care leaders frequently must face challenging situations requiring specific leadership and management skills for which they are, not uncommonly, poorly prepared. Such a fictitious scenario was discussed at a Canadian interdisciplinary critical care leadership meeting, whereby increasing intensive care unit (ICU) staff turnover had led to problems with staff recruitment. Participants discussed and proposed solutions to the scenario in a structured format. The results of the discussion are presented. In situations such as this, the ICU leader should first define the core problem, its complexity, its duration and its potential for reversibility. These factors often reside within workload and staff support issues. Some examples of core problems discussed that are frequently associated with poor retention and recruitment are a lack of a positive team culture, a lack of a favorable ICU image, a lack of good working relationships between staff and disciplines, and a lack of specific supportive resources. Several tools or individuals (typically outside the ICU environment) are available to help determine the core problem. Once the core problem is identified, specific solutions can be developed. Such solutions often require originality and flexibility, and must be planned, with specific short-term, medium-term and long-term goals. The ICU leader will need to develop an implementation strategy for these solutions, in which partners who can assist are identified from within the ICU and from outside the ICU. It is important that the leader communicates to all stakeholders frequently as the process moves forward

Identidad y derecho: una introducción temática

Con esta breve introducción al tema general se trata de presentar al lector desde un punto de vista filosófico las diferentes dimensiones que tiene la noción de identidad personal en sus relaciones con el derecho, desde la mera identificación individual de los destinatarios de las normas jurídicas a los problemas que plantea hoy la identidad de sujetos colectivos que se presentan ante el orden jurídico para demandar reconocimiento. En todos los estadios de ese proceso complejo el orden jurídico toma inspiración de las convicciones morales y las concepciones del mundo vigentes en la sociedad. Ello fuerza al estudioso del derecho a ampliar el horizonte de sus investigaciones hasta incluir en él las aportaciones de la filosofía y de las ciencias socialesThis short introduction to the general subject «identity and law» tries to present to the reader, from a philosophical point of view, different dimensions of the notion of personal identity and its relations to law, from the sample identification of the legal norms addressees to the problems of the assumed identity of collective subjects that demand some recognition from laws. In all the steps of this complex problem the legal order is inspired by the moral convictions and social conceptions living in our societies. This feature forces legal scholars and interpreters to widen the scope of their research to include the contributions of philosophy and social science

El imperio de la ley: una visión actual

Divulgação dos SUMÁRIOS das obras recentemente incorporadas ao acervo da Biblioteca Ministro Oscar Saraiva do STJ. Em respeito à lei de Direitos Autorais, não disponibilizamos a obra na íntegra. STJ0008191