Impacto socioeconómico, humano y ambiental de los graduados de la carrera de Psicología de la UNAN-CURM Matagalpa en el desarrollo de la región Norte (Matagalpa-Jinotega) durante el periodo 2006-2009

En este seminario de graduación se determinó el impacto socioeconómico, humano y ambiental de los graduados en la carrera de Psicología de la UNAN-CUR Matagalpa, en el desarrollo de la Región Norte (Matagalpa-Jinotega) durante el periodo 2006-2009, además de comparar los resultados de la satisfacción profesional con las carreras de Contabilidad, Economía, Administración, Agronomía e Informática. Las variables estudiadas en ésta investigación fueron: Comportamiento Académico, Desempeño Laboral y el Aporte Socioeconómico, Humano, Ambiental y Cultural de los graduados. Dicho estudio demostró que la metodología tradicional, es empleada en la UNAN-MATAGALPA, pues para los docentes todavía existen dificultades para salir de actividades rutinarias, sin embargo para los graduados de la carrera de Psicología el plan de estudio implementado en su carrera estaba bastante completo. El 100 % de los graduados en la Carrera de Psicología de la UNAN-MATAGALPA, se encuentran laborando un 68.75%, de estos, un 35% laboran dentro de su perfil profesional. Por otro lado, ésta investigación concluye que un 7.32% de los graduados, contribuyeron aportando a la generación de empleos por medio de la creación de pequeñas empresas que impulsan un poco las actividades económicas en la región norte. Del total de los graduados de la carrera de Psicología que se encuentran laborando un 100% se dedican a las actividades relacionadas al sector terciario o sector servicios, que en parámetros de indicadores económicos en uno de los más importantes, ya que es fundamental en una socieda

Ultra-stable long distance optical frequency distribution using the Internet fiber network

We report an optical link of 540 km for ultrastable frequency distribution over the Internet fiber network. The stable frequency optical signal is processed enabling uninterrupted propagation on both directions. The robustness and the performance of the link are enhanced by a cost effective fully automated optoelectronic station. This device is able to coherently regenerate the return optical signal with a heterodyne optical phase locking of a low noise laser diode. Moreover the incoming signal polarization variation are tracked and processed in order to maintain beat note amplitudes within the operation range. Stable fibered optical interferometer enables optical detection of the link round trip phase signal. The phase-noise compensated link shows a fractional frequency instability in 10 Hz bandwidth of 5x10-15 at one second measurement time and 2x10-19 at 30 000 s. This work is a significant step towards a sustainable wide area ultrastable optical frequency distribution and comparison network

Mid-IR frequency measurement using an optical frequency comb and a long-distance remote frequency reference

We have built a frequency chain which enables to measure the absolute frequency of a laser emitting in the 28-31 THz frequency range and stabilized onto a molecular absorption line. The set-up uses an optical frequency comb and an ultrastable 1.55 $\mu$m frequency reference signal, transferred from LNE-SYRTE to LPL through an optical link. We are now progressing towards the stabilization of the mid-IR laser via the frequency comb and the extension of this technique to quantum cascade lasers. Such a development is very challenging for ultrahigh resolution molecular spectroscopy and fundamental tests of physics with molecules

Cascaded multiplexed optical link on a telecommunication network for frequency dissemination

We demonstrate a cascaded optical link for ultrastable frequency dissemination comprised of two compensated links of 150 km and a repeater station. Each link includes 114 km of Internet fiber simultaneously carrying data traffic through a dense wavelength division multiplexing technology, and passes through two routing centers of the telecommunication network. The optical reference signal is inserted in and extracted from the communication network using bidirectional optical add-drop multiplexers. The repeater station operates autonomously ensuring noise compensation on the two links and the ultra-stable signal optical regeneration. The compensated link shows a fractional frequency instability of 3 \times 10-15 at one second measurement time and 5 \times 10-20 at 20 hours. This work paves the way to a wide dissemination of ultra-stable optical clock signals between distant laboratories via the Internet network

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