274 research outputs found
Cultivating and Refining Clinical Knowledge and Practice: Relating the Boyer Model to Doctor of Nursing Practice Scholarship
No full textThis article discusses the importance of collaboration between faculty members with clinical and research focused doctoral degrees. The barriers to obtaining tenure for clinical faculty members as compared to the research prepared faculty members are presented. Best practice outcomes are accomplished by using a team approach. The team uses the strenths of each of the academic bacgrounds, connecting them in collaboration and professionalism. Support for each other, with the Nursing community, provides empowerment and success in both patient outcomes and clinical excellence.Peer reviewe
Kirkwood–buff integrals from molecular simulation
No full textThe Kirkwood–Buff (KB) theory is one of the most rigorous solution theories thatconnects molecular structure to macroscopic behaviour. The key quantity, the so–called KB Kirkwood–Buff Integrals (KBIs), are defined either in terms of fluctuations in the number of molecules or integrals over radial distribution functions over open subvolumes. In the grand–canonical ensemble, KBIs of infinitely large and open systems are directly related to thermodynamic properties such as partial derivatives of chemical potentials and partial molar volumes. Using molecular simulations, it is only possible to study small systems with a finite number of molecules, and therefore finite–size effects should be considered.Engineering Thermodynamic
Algebraic study of the periodic points and multipliers of a rational map
No full textDans cette thèse, nous examinons plusieurs questions arithmétiques concernant les points périodiques et les multiplicateurs d'une fraction rationnelle. Nous étudions l'ensemble des paramètres complexes c pour lesquels deux points donnés a et b sont simultanément prépériodiques pour le polynôme f_c(z) = z^2 +c. En combinant des arguments d'analyse complexe et de théorie des nombres, Baker et DeMarco ont montré que cet ensemble de paramètres est infini si et seulement si a^2 = b^2. Récemment, Buff a répondu à une de leurs questions, en prouvant que l'ensemble des paramètres c pour lesquels 0 et 1 sont tous deux prépériodiques pour f_c est égal à {-2, -1, 0}. Nous complétons la description de ces ensembles quand a et b sont deux entiers tels que |a| ≠ |b|. Nous examinons également une conjecture de Milnor concernant les fractions rationnelles dont le multiplicateur en chaque cycle est entier. Nous montrons que la conjecture est vraie dans le cas des polynômes cubiques avec symétries, en prouvant que tout polynôme cubique avec symétries dont tous les multiplicateurs sont entiers est soit une application puissance soit une application de Tchebychev. Nous étudions aussi certaines généralisations de la question de Milnor. Ainsi, nous montrons que tout polynôme unicritique qui n'a que des multiplicateurs rationnels est soit une application puissance soit une application de Tchebychev. Nous prouvons également que toute fraction rationnelle quadratique dont tous les multiplicateurs sont dans l'anneau des entiers d'un corps quadratique imaginaire donné est une application puissance, une application de Tchebychev ou un exemple de Lattès. Nous sommes ainsi amenés à étudier les points périodiques et les multiplicateurs d'une fraction rationnelle d'un point de vue algébrique avec les notions de polynômes dynatomiques et de polynômes multiplicateurs. Nous examinons aussi certaines propriétés de ces polynômes, et notamment les coefficients des polynômes multiplicateurs d'une fraction rationnelle.In this thesis, we examine several arithmetic questions concerning the periodic points and multipliers of a rational map. We study the set of complex parameters c for which two given points a and b are simultaneously preperiodic for the quadratic polynomial f_c(z) = z^2 +c. Combining complex-analytic and number-theoretic arguments, Baker and DeMarco showed that this set of parameters is infinite if and only if a^2 = b^2. Recently, Buff answered a question of theirs, proving that the set of parameters c for which both 0 and 1 are preperiodic for f_c equals {-2, -1, 0}. We complete the description of these sets when a and b are two integers such that |a| ≠ |b|. We also examine a conjecture by Milnor concerning rational maps whose multiplier at each cycle is an integer. We show that the conjecture is true in the case of cubic polynomials with symmetries, proving that every cubic polynomial with symmetries whose multipliers are all integers is either a power map or a Chebyshev map. We also study generalizations of Milnor's question. Thus, we show that every unicritical polynomial that has only rational multipliers is either a power map or a Chebyshev map. We also prove that every quadratic rational map whose multipliers all lie in the ring of integers of a given imaginary quadratic field is a power map, a Chebyshev map or a Lattès map. Thus, we are led to study the periodic points and multipliers of a rational map from an algebraic viewpoint with the notions of dynatomic polynomials and multiplier polynomials. We also examine certain properties of these polynomials, and in particular the coefficients of the multiplier polynomials of a rational map
Kirkwood-Buff integrals from molecular simulation
No full textThe Kirkwood-Buff (KB) theory provides a rigorous framework to predict thermodynamic properties of isotropic liquids from the microscopic structure. Several thermodynamic quantities relate to KB integrals, such as partial molar volumes. KB integrals are expressed as integrals of RDFs over volume but can also be obtained from density fluctuations in the grand-canonical ensemble. Various methods have been proposed to estimate KB integrals from molecular simulation. In this work, we review the available methods to compute KB integrals from molecular simulations of finite systems, and particular attention is paid to finite-size effects. We also review various applications of KB integrals computed from simulations. These applications demonstrate the importance of computing KB integrals for relating findings of molecular simulation to macroscopic thermodynamic properties of isotropic liquids.Accepted Author ManuscriptEngineering Thermodynamic
Kirkwood-Buff integrals: From fluctuations in finite volumes to the thermodynamic limit
No full textThe Kirkwood-Buff theory is a cornerstone of the statistical mechanics of liquids and solutions. It relates volume integrals over the radial distribution function, so-called Kirkwood-Buff integrals (KBIs), to particle number fluctuations and thereby to various macroscopic thermodynamic quantities such as the isothermal compressibility and partial molar volumes. Recently, the field has seen a strong revival with breakthroughs in the numerical computation of KBIs and applications to complex systems such as bio-molecules. One of the main emergent results is the possibility to use the finite volume KBIs as a tool to access finite volume thermodynamic quantities. The purpose of this Perspective is to shed new light on the latest developments and discuss future avenues.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Engineering Thermodynamic
Nīshāpūr figural buff ware pottery: facing unprovenanced objects
No full textThis thesis focuses on Nīshāpūr buff ware, one of the twelve types of Nishapur pottery (9th-10th century A.D.) excavated from the Nīshāpūr site from 1937-1940 and first identified and analyzed by Charles K. Wilkinson. Nīshāpūr buff ware features enigmatic images of birds, quadrupeds, and humans rendered in a unique combination of yellow, green, black, and sometimes red colors. While these vessels in museum collections, auction catalogues, and scholarly publications feature a variety of images and are plentiful, almost the entire corpus of these materials has no provenance and is heavily restored, consequently creating a challenge in extrapolating information. This thesis hopes to offer new insight into the history of the collection and postexcavation of Nīshāpūr figural buff ware in museums around the world through a comparative study of quantity, quality, and aesthetics that has great potential to heighten our understanding of the production of ceramics in that era. Furthermore, juxtaposing provenanced and unprovenanced Nīshāpūr figural buff ware could reveal issues concerning authenticity, such as the issues of fakes and forgeries as well as the role of heavy restoration in scholarly interpretation.M.A.Includes bibliographical referencesby Layah Ziaii-Bigdel
Courants dynamiques pluripolaires
No full textInternational audienceWe show the existence of birational self-maps f of P^k which are algebraically stable with algebraic degree d, for which there is a unique positive closed (1,1) current T satisfying f^*T=d T and ||T||=1 and for which the current T gives total mass to a pluripolar set
Recent applications of Kirkwood–Buff theory to biological systems
No full textThe effect of cosolvents on biomolecular equilibria has traditionally been rationalized using simple binding models. More recently, a renewed interest in the use of Kirkwood–Buff (KB) theory to analyze solution mixtures has provided new information on the effects of osmolytes and denaturants and their interactions with biomolecules. Here we review the status of KB theory as applied to biological systems. In particular, the existing models of denaturation are analyzed in terms of KB theory, and the use of KB theory to interpret computer simulation data for these systems is discussed
Fibonacci fixed point of renormalization
No full textTo study the geometry of a Fibonacci map of even degree , Lyubich (Dynamics of quadratic polynomials, I–II. Acta Mathematica178 (1997), 185–297) defined a notion of generalized renormalization, so that is renormalizable infinitely many times. van Strien and Nowicki (Polynomial maps with a Julia set of positive Lebesgue measure: Fibonacci maps. Preprint, Institute for Mathematical Sciences, SUNY at Stony Brook, 1994) proved that the generalized renormalizations converge to a cycle of order two depending only on . We will explicitly relate and and show the convergence in shape of Fibonacci puzzle pieces to the Julia set of an appropriate polynomial-like map.</jats:p
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