Vlasov analysis of relaxation and meta-equilibrium

The Hamiltonian Mean-Field model (HMF), an inertial XY ferromagnet with infinite-range interactions, has been extensively studied in the last few years, especially due to its long-lived meta-equilibrium states, which exhibit a series of anomalies, such as, breakdown of ergodicity, anomalous diffusion, aging, and non-Maxwell velocity distributions. The most widely investigated meta-equilibrium states of the HMF arise from special (fully magnetized) initial conditions that evolve to a spatially homogeneous state with well defined macroscopic characteristics and whose lifetime increases with the system size, eventually reaching equilibrium. These meta-equilibrium states have been observed for specific energies close below the critical value 0.75, corresponding to a ferromagnetic phase transition, and disappear below a certain energy close to 0.68. In the thermodynamic limit, the $\mu$-space dynamics is governed by a Vlasov equation. For finite systems this is an approximation to the exact dynamics. However, it provides an explanation, for instance, for the violent initial relaxation and for the disappearance of the homogeneous states at energies below 0.68.Comment: 7 pages, 2 figures. Contribution to the Proceedings of the 31st Workshop of the International School of Solid State Physics ``Complexity, Metastability and Nonextensivity'', held at the Ettore Majorana Foundation and Centre for Scientific Culture, Erice, Sicily, Italy, July 2004. Edited by C. Tsallis, A. Rapisarda and C. Bec

Quantum Baker Maps for Spiraling Chaotic Motion

We define a coupling of two baker maps through a pi/2 rotation both in position and in momentum. The classical trajectories thus exhibit spiraling, or loxodromic motion, which is only possible for conservative maps of at least two degrees of freedom. This loxodromic baker map is still hyperbolic, that is, fully chaotic. Quantization of this map follows on similar lines to other generalized baker maps. It is found that the eigenvalue spectrum for quantum loxodromic baker map is far removed from those of the canonical random matrix ensembles. An investigation of the symmetries of the loxodromic baker map reveals the cause of this deviation from the Bohigas-Giannoni-Schmit conjecture

Gestión del talento humano y desarrollo de competencias profesionales en la Universidad Nacional Intercultural Fabiola Salazar Leguía de Bagua

La presente investigación cuyo objetivo fue determinar de qué manera se relaciona la Gestión del talento humano y el desarrollo de competencias profesionales en la Universidad Nacional Intercultural Fabiola Salazar Leguía de Bagua, el estudio de tipo básica, se desarrolló bajo un de diseño no experimental transversal, descriptivo correlacional, en una población de 45 trabajadores de dicha institución, la técnica de recojo de información fue la encuesta y el cuestionario como instrumento. Se tuvo como resultado principal que existe relación alta y positiva entre la Gestión del talento humano y el desarrollo de competencias profesionales en la Universidad Nacional Intercultural Fabiola Salazar Leguía de Bagua, 2021, con un p<0,05 y Rho de Spearman = 0,764. Y, se concluye que, si la dirección general de administración junto con dirección de escuela y jefaturas logran una adecuada administración de los recursos humanos, estarán proporcionando una forma común de armonizar, seleccionar y desarrollar el talento, el que se traduce en beneficios claros para los empleados, jefaturas, y en última instancia, para la organización

Motivación laboral y calidad educativa en docentes de tres instituciones educativas privadas de Lima Metropolitana

El objetivo general fue establecer la relación que existe entre la motivación laboral y la calidad educativa en los docentes de tres instituciones educativas privadas de Lima Metropolitana. El diseño utilizado fue no experimental, transversal, correlacional no causal. El tipo de muestreo utilizado fue no probabilístico intencional. La muestra estuvo conformada por 146 docentes entre varones y mujeres, y comprendidos entre las edades de 25 a 62 años. Los instrumentos utilizados fueron el Cuestionario de motivación laboral de Steers y Braunstein y Cuestionario de Autoevaluación de centros escolares para la gestión de la calidad. Entre los principales resultados se hallaron que existe relación débil y positiva entre la motivación laboral y la calidad educativa desde la percepción de los docentes de tres instituciones educativas privadas de Lima Metropolitana. Las implicancias de los hallazgos han sido discutidas.The general objective was to establish the relationship that exists between work motivation and educational quality of the teachers from three private educational institutions within Lima. the design used was non-experimental, cross-sectional, noncausal correlational. The sample consisted of 146 men and women, ranging in age from 25 to 62 years. The instruments used were the Labor Motivational Questionnaire of Steer and Braunstein and Self-evaluation of schools for quality management Questionnaire. Among the main results, it was found that there is a weak and positive relationship between work motivation and educational quality from the perception of teachers from three private educational institutions in Lima. The implications of the findings have been discussed

Analysis of cell-biomaterial interaction through cellular bridge formation in the interface between hGMSCs and CaP bioceramics

The combination of biomaterials and stem cells for clinical applications constitute a great challenge in bone tissue engineering. Hence, cellular networks derived from cells-biomaterials crosstalk have a profound influence on cell behaviour and communication, preceding proliferation and differentiation. The purpose of this study was to investigate in vitro cellular networks derived from human gingival mesenchymal stem cells (hGMSCs) and calcium phosphate (CaP) bioceramic interaction. Biological performance of CaP bioceramic and hGMSCs interaction was evaluated through cell adhesion and distribution, cellular proliferation, and potential osteogenic differentiation, at three different times: 5 h, 1 week and 4 weeks. Results confirmed that hGMSCs met the required MSCs criteria while displaying osteogenic differentiaton capacities. We found a significant increase of cellular numbers and proliferation levels. Also, protein and mRNA OPN expression were upregulated in cells cultured with CaP bioceramic by day 21, suggesting an osteoinductible effect of the CaP bioceramic on hGMSCs. Remarkably, CaP bioceramic aggregations were obtained through hGMSCs bridges, suggesting the in vitro potential of macrostructures formation. We conclude that hGMSCs and CaP bioceramics with micro and macropores support hGMSC adhesion, proliferation and osteogenic differentiation. Our results suggest that investigations focused on the interface cells-biomaterials are essential for bone tissue regenerative therapies