Search results for "ATZ"
showing 10 items of 256 documents
Partition function of the trigonometric SOS model with reflecting end
2010
We compute the partition function of the trigonometric SOS model with one reflecting end and domain wall type boundary conditions. We show that in this case, instead of a sum of determinants obtained by Rosengren for the SOS model on a square lattice without reflection, the partition function can be represented as a single Izergin determinant. This result is crucial for the study of the Bethe vectors of the spin chains with non-diagonal boundary terms.
Open spin chains with generic integrable boundaries: Baxter equation and Bethe ansatz completeness from separation of variables
2014
28 pages; International audience; We solve the longstanding problem to define a functional characterization of the spectrum of the transfer matrix associated to the most general spin-1/2 representations of the 6-vertex reflection algebra for general inhomogeneous chains. The corresponding homogeneous limit reproduces the spectrum of the Hamiltonian of the spin-1/2 open XXZ and XXX quantum chains with the most general integrable boundaries. The spectrum is characterized by a second order finite difference functional equation of Baxter type with an inhomogeneous term which vanishes only for some special but yet interesting non-diagonal boundary conditions. This functional equation is shown to…
Workplace-based assessment of communication skills: A pilot project addressing feasibility, acceptance and reliability
2016
Background: Imparting communication skills has been given great importance in medical curricula. In addition to standardized assessments, students should communicate with real patients in actual clinical situations during workplace-based assessments and receive structured feedback on their performance. The aim of this project was to pilot a formative testing method for workplace-based assessment. Our investigation centered in particular on whether or not physicians view the method as feasible and how high acceptance is among students. In addition, we assessed the reliability of the method. Method: As part of the project, 16 students held two consultations each with chronically ill patients …
Attitudes and perceptions of faculty members in the process adopting innovation: The OpenCourseWare initiative at the University of Valencia, Spain
2014
The OpenCourseWare project, an open learning resource repository, was established at the University of Valencia between 2008 and2009. It initially consisted of only 10 subjects, none of which was in the field of Health Sciences. The objective of this research was toinvestigate the attitudes and perceptions of faculty members in the field of Health Sciences with regard to the project to identify strategies to increase its use and expand its coverage. We applied Rogers’ innovation-diffusion theory along with a qualitative approach using theoretical sampling, semi-structured interviews and open coding. The results indicate the existence of two categories of faculty members. In the first group,…
Parallel Calculation of CCSDT and Mk-MRCCSDT Energies.
2010
A scheme for the parallel calculation of energies at the coupled-cluster singles, doubles, and triples (CCSDT) level of theory, several approximate iterative CCSDT schemes (CCSDT-1a, CCSDT-1b, CCSDT-2, CCSDT-3, and CC3), and for the state-specific multireference coupled-cluster ansatz suggested by Mukherjee with a full treatment of triple excitations (Mk-MRCCSDT) is presented. The proposed scheme is based on the adaptation of a highly efficient serial coupled-cluster code leading to a communication-minimized implementation by parallelizing the time-determining steps. The parallel algorithm is tailored for affordable cluster architectures connected by standard communication networks such as …
Constructions with shell nouns in English: their dual role in information packaging
2018
Les construccions encapsuladores en anglès i la doble funció en l'emmagatzematge de la informació
 Aquest treball se centra en les propietats funcionals i estructurals d’un tipus de fórmules focals en anglès: les construccions del tipus N-be-that (Schmid 2001), com en The problem is that he is jealous, a les quals denominem fórmules amb encapsuladors (FFSNs, segons la denominació en anglès). La funció dels noms en aquest patró consisteix a crear closques conceptuals (Schmid 1997) dins de les quals s’encapsula el contingut proposicional, una operació afavorida pel vincle coreferencial que hi ha entre les dues parts del patró. Les dades proporcionades pel BNC mostren dues manifestacions …
Atziņas un to formulējums Plūtarha tekstos (“Paralēlie dzīves apraksti”)
2016
Bakalaura darbs paredz atrast atziņas Plūtarha “Paralēlos dzīves aprakstos” ar mērķi izpētīt tās Plūtarha tekstos, izvērtējot to saturu un lomu pēc atrašanās vietas tekstā. Teorētiskajā daļā apskatīta teorija par Plūtarha stilu, “Paralēlo dzīves aprakstu” vispārējs raksturojums un atziņu jēdziena nozīme. Praktiska daļa ir balstīta uz analīze, kura veikta ar atziņām tekstā, galvenokārt uz kontekstuālu analīzi. Izvēlētajās astoņas Plūtarha biogrāfijās pētīšanas procesa tiek atrastas atziņas. Atziņas klasificētas tematiskie. Sešas tematiskās vienības: slava, bailes, godkāre, liktenis, nāve un vara. Atziņas Plūtarha tekstos tiek vētītas arī pēc to atrašanās vietas tekstā. Secināts, ka atziņas p…
A gauge-technique Ansatz for the three gluon vertex of the background field method
2011
The vertex connecting one background gluon with two quantum ones constitutes a central ingredient in the gauge-invariant Schwinger-Dyson equation that determines the non-perturbative dynamics of the gluon propagator. This vertex satisfies a Ward identity with respect to the background gluon, and a Slavnov-Taylor identity with respect to the two quantum gluons. We present a complete Ansatz for this vertex, which satisfies both aforementioned identities. This entire construction depends crucially on a set of constraints relating the various form-factors of the ghost Green's functions appearing in the Slavnov-Taylor identity satisfied by the vertex. The validity of these constraints is demonst…
Angst und Verzagtheit im . Eine Studie zum Wortschatz der Angst
2015
The Meier Helmbrecht, written by Wernher der Gärtner between 1250 and 1280, has often been object of study especially with regard to the protagonist’s extreme ambition and the disowning of his own origins and of his family heritage, but it also offers excellent opportunities for linguistic reflexions. Contrary to what is expected in a text, where the main character lives an immoral life and where his family is constantly concerned about his fate, there are few words to express fear or anxiety, but Wernher der Gärtner chooses the words used carefully, highlighting the different ways the characters perceive and reveal these emotions. The study of the vocabulary of fear in this work allows us …
Electronic transport in molecular junctions : The generalized Kadanoff–Baym ansatz with initial contact and correlations
2021
The generalized Kadanoff-Baym ansatz (GKBA) offers a computationally inexpensive approach to simulate out-of-equilibrium quantum systems within the framework of nonequilibrium Green's functions. For finite systems the limitation of neglecting initial correlations in the conventional GKBA approach has recently been overcome [Phys. Rev. B 98, 115148 (2018)]. However, in the context of quantum transport the contacted nature of the initial state, i.e., a junction connected to bulk leads, requires a further extension of the GKBA approach. In this work, we lay down a GKBA scheme which includes initial correlations in a partition-free setting. In practice, this means that the equilibration of the …