Reduction in principal fiber bundles: covariant Euler-Poincare equations

Let $\pi:P\to M^n$ be a principal G-bundle, and let ${\mathcal{L}}: J^1P \to\Lambda^n(M)$ be a G-invariant Lagrangian density. We obtain the Euler-Poincare equations for the reduced Lagrangian l defined on ${\mathcal C}(P)$, the bundle of connections on P

Polycyclic codes over Galois rings with applications to repeated-root constacyclic codes

Cyclic, negacyclic and constacyclic codes are part of a larger class of codes called polycyclic codes; namely, those codes which can be viewed as ideals of a factor ring of a polynomial ring. The structure of the ambient ring of polycyclic codes over GR(p^a,m) and generating sets for its ideals are considered. Along with some structure details of the ambient ring, the existance of a certain type of generating set for an ideal is proven.Comment: arXiv admin note: text overlap with arXiv:0906.400

Mechatronics & the cloud

Conventionally, the engineering design process has assumed that the design team is able to exercise control over all elements of the design, either directly or indirectly in the case of sub-systems through their specifications. The introduction of Cyber-Physical Systems (CPS) and the Internet of Things (IoT) means that a design team’s ability to have control over all elements of a system is no longer the case, particularly as the actual system configuration may well be being dynamically reconfigured in real-time according to user (and vendor) context and need. Additionally, the integration of the Internet of Things with elements of Big Data means that information becomes a commodity to be autonomously traded by and between systems, again according to context and need, all of which has implications for the privacy of system users. The paper therefore considers the relationship between mechatronics and cloud-basedtechnologies in relation to issues such as the distribution of functionality and user privacy

Privacy matters:issues within mechatronics

As mechatronic devices and components become increasingly integrated with and within wider systems concepts such as Cyber-Physical Systems and the Internet of Things, designer engineers are faced with new sets of challenges in areas such as privacy. The paper looks at the current, and potential future, of privacy legislation, regulations and standards and considers how these are likely to impact on the way in which mechatronics is perceived and viewed. The emphasis is not therefore on technical issues, though these are brought into consideration where relevant, but on the soft, or human centred, issues associated with achieving user privacy

3-D Kinematics of the HH 110 jet

We present new results on the kinematics of the jet HH 110. New proper motion measurements have been calculated from [SII] CCD images obtained with a time baseline of nearly fifteen years. HH 110 proper motions show a strong asymmetry with respect to the outflow axis, with a general trend of pointing towards the west of the axis direction. Spatial velocities have been obtained by combining the proper motions and radial velocities from Fabry-Perot data. Velocities decrease by a factor ~3 over a distance of ~10$^{18}$ cm, much shorter than the distances expected for the braking caused by the jet/environment interaction. Our results show evidence of an anomalously strong interaction between the outflow and the surrounding environment, and are compatible with the scenario in which HH 110 emerges from a deflection in a jet/cloud collision.Comment: (1)Universitat de Barcelona; (2)UNAM; (3)UPC; (4)University of Hawaii; (5)Southern Astrophysical Research Telescope. 9 pages; 7 Figures Accepted by A&

Evidence of a discontinuous disk structure around the Herbig Ae star HD 139 614

A new class of pre-main sequence objects has been recently identified as pre-transitional disks. They present near-infrared excess coupled to a flux deficit at about 10 microns and a rising mid-infrared and far-infrared spectrum. These features suggest a disk structure with inner and outer dust components, separated by a dust-depleted region (or gap). We here report on the first interferometric observations of the disk around the Herbig Ae star HD 139614. Its infrared spectrum suggests a flared disk, and presents pre-transitional features,namely a substantial near-infrared excess accompanied by a dip around 6 microns and a rising mid-infrared part. In this framework, we performed a study of the spectral energy distribution (SED) and the mid-infrared VLTI/MIDI interferometric data to constrain thespatial structure of the inner dust disk region and assess its possibly multi-component structure. We based our work on a temperature-gradient disk model that includes dust opacity. While we could not reproduce the SED and interferometric visibilities with a one-component disk, a better agreement was obtained with a two-component disk model composed of an optically thin inner disk extending from 0.22 to 2.3 au, a gap, and an outer temperature-gradient disk starting at 5.6 au. Therefore, our modeling favors an extended and optically thin inner dust component and in principle rules out the possibility that the near-infrared excess originates only from a spatially confined region. Moreover, the outer disk is characterized by a very steep temperature profile and a temperature higher than 300 K at its inner edge. This suggests the existence of a warm component corresponding to a scenario where the inner edge of the outer disk is directly illuminated by the central star. This is an expected consequence of the presence of a gap, thus indicative of a pre-transitional structure.Comment: 14 pages, 6 figure

HD139614: the interferometric case for a group-Ib pre-transitional young disk

The Herbig Ae star HD 139614 is a group-Ib object, which featureless SED indicates disk flaring and a possible pre-transitional evolutionary stage. We present mid- and near-IR interferometric results collected with MIDI, AMBER and PIONIER with the aim of constraining the spatial structure of the 0.1-10 AU disk region and assess its possible multi-component structure. A two-component disk model composed of an optically thin 2-AU wide inner disk and an outer temperature-gradient disk starting at 5.6 AU reproduces well the observations. This is an additional argument to the idea that group-I HAeBe inner disks could be already in the disk-clearing transient stage. HD 139614 will become a prime target for mid-IR interferometric imaging with the second-generation instrument MATISSE of the VLTI.Comment: SPIE Astronomical Telescopes and Instrumentation conference, June 2014, 11 pages, 7 Figure

Gobierno electrónico y transparencia en la gestión en el Ministerio de Salud, Jesús María, Lima, 2021

El gobierno electrónico genera una impresión positiva ante la ciudadanía y los servidores públicos, también existe un cierto desconocimiento sobre la normativa sobre la ley de Transparencia, lo que genera brechas entre el ciudadano y el estado respectivamente. En ese sentido, el presente trabajo tiene como objetivo establecer el vínculo asociativo entre gobierno electrónico y transparencia en el Ministerio de Salud, Jesús María, Lima, 2021. De enfoque cuantitativo, tipo básico, diseño no experimental; corte transversal, con un diseño descriptivo correlacional, se utilizó la técnica de encuesta y de instrumento el cuestionario; con 28 ítems para la variable gobierno electrónico y Transparencia, que se aplicó a 80 colaboradores. Asimismo, se utilizó la prueba Alfa de Cronbach para determinar su respectiva confiabilidad en prueba piloto independiente. Finalmente, se obtuvo una correlación positiva considerable de 0.647 y significativa al nivel de 0.01, donde se determinó que existe una relación significativa entre gobierno electrónico y transparencia en el Ministerio de Salud

Comunicación asertiva y satisfacción laboral de los docentes en una institución educativa privada del distrito de La Victoria, 2023

El objetivo de la investigación fue determinar la relación entre comunicación asertiva y satisfacción laboral de los docentes en una institución educativa privada del distrito de la Victoria, 2023. Corresponde a un tipo de investigación básica, con enfoque cuantitativo, transversal, con diseño no experimental. La población fue de 70 (setenta) docentes de la institución educativa. La técnica fue la encuesta y como instrumentos se aplicó un cuestionario válido y confiable; La prueba de normalidad, determinó la correlación de Spearman. Los resultados muestran y se concluye que existe una correlación entre la variable “Comunicación asertiva” y la variable “Satisfacción laboral”, según prueba con una p=0,000 (Menor al nivel de significancia α=0,05). Asimismo, la prueba de Rho de 0,998, ubicándose en un nivel positivo, por tanto, se acepta la hipótesis general de la investigación, y el logro del objetivo general, por lo que se afirma el incremento de la comunicación asertiva incrementa considerablemente la satisfacción laboral de los docentes en una institución educativa privada del distrito de la Victoria, 2023