Gravitational S-matrix from CFT dispersion relations

We analyse the double-discontinuities of the four-point correlator of the stress-tensor multiplet in N=4 SYM at large t' Hooft coupling and at order $1/N^4$, as a way to access one-loop effects in the dual supergravity theory. From these singularities we extract CFT-data by using two inversion procedures: one based on a recently proposed Froissart-Gribov inversion integral, and the other based on large spin perturbation theory. Both procedures lead to the same results and are shown to be equivalent more generally. Our computation parallels the standard S-matrix reconstruction via dispersion relations. In a suitable limit, the result of the conformal field theory calculation is compared with the one-loop graviton scattering amplitude in ten-dimensional IIB supergravity in flat space, finding perfect agreement.Comment: 39 pages, pretty figure

Two-Sided Derivatives for Regular Expressions and for Hairpin Expressions

The aim of this paper is to design the polynomial construction of a finite recognizer for hairpin completions of regular languages. This is achieved by considering completions as new expression operators and by applying derivation techniques to the associated extended expressions called hairpin expressions. More precisely, we extend partial derivation of regular expressions to two-sided partial derivation of hairpin expressions and we show how to deduce a recognizer for a hairpin expression from its two-sided derived term automaton, providing an alternative proof of the fact that hairpin completions of regular languages are linear context-free.Comment: 28 page

The Nursing Shortage in the United States: What Can be Done to Solve the Crisis?

This document is a compilation of empirical, anecdotal and economic research from various authorities in the arenas of nursing and academia. The focus of this writing will be limited to the hospital setting for purposes of my personal experience as well as the interminable sources of data. The profession of nursing has always been considered by many to be one of great nobility and respect. Dating as for back to the mid 1800’s, Florence Nightingale was the pre-eminent pioneer of nursing and advocate for the sick and injured. Since that era, and mindful that nursing is now in the midst of the most profound of its periodic shortages, it has evolved into a uniquely challenging livelihood, one blending a vast array of duties into a single career. Cognizant of the fact that this occupation incorporates attributes of other professions such as teaching, counseling, crisis intervention, service attendance, parenting, and mentoring, it is undeniably one of the most stressful careers in today’s society. This certainly appears to align with the term “multitasking”, and nursing has been accomplishing just that even well before multitasking was recognized. A typical RN in a hospital setting will render direct patient care by cleaning and turning patients, resuscitating patients, assessing vital signs, starting intravenous lines, administering medications, taking verbal telephone orders from physicians, charting and documentation, teaching, answering telephones, and transporting patients to other areas of the hospital only to cite some of the major tasks. Such has been the case for decades, which clarifies the position that nursing is by far one of the most demanding and sometimes unrewarding professions of all time. As I will elaborate on throughout this writing, the challenge of nursing, accompanied by a myriad of other causes, is merely one of the reasons that have contributed to the shortage

Alien Registration- Caron, Rosalie F. (Lewiston, Androscoggin County)

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Alien Registration- Caron, Joseph F. (Lewiston, Androscoggin County)

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Heavy Quark Thermalization in Classical Lattice Gauge Theory: Lessons for Strongly-Coupled QCD

Thermalization of a heavy quark near rest is controlled by the correlator of two electric fields along a temporal Wilson line. We address this correlator within real-time, classical lattice Yang-Mills theory, and elaborate on the analogies that exist with the dynamics of hot QCD. In the weak-coupling limit, it can be shown analytically that the dynamics on the two sides are closely related to each other. For intermediate couplings, we carry out non-perturbative simulations within the classical theory, showing that the leading term in the weak-coupling expansion significantly underestimates the heavy quark thermalization rate. Our analytic and numerical results also yield a general understanding concerning the overall shape of the spectral function corresponding to the electric field correlator, which may be helpful in subsequent efforts to reconstruct it from Euclidean lattice Monte Carlo simulations.Comment: 22 pages. v2: a reference and clarifications added; published versio

Ge- en moyen-haut-allemand ou l'évitement du particulier et du temps incarné

During the Middle Ages, the prefix ge-  was widely used in German, appearing in nouns, adjectives and verbs. These composed forms usually existed alongside their simple, unprefixed counterparts. Yet although the various compositional values are not difficult to determine for nouns, the same is not true of verbs. What was the function of ge- when used as a verbal prefix? Is it possible to link this non-nominal ge- to its nominal double, and to examine if the “unifying-and-totalizing” value of ge- (in nouns) also applies to verbs?

Ciprofloxacin/amikacin combination therapy: evaluation in biofilms of Pseudomonas aeruginosa overproducting efflux pumps

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