Electro-optical Simulation of a-Si Thin-Film-Transistor Liquid Crystal Display Pixels

An analysis of an amorphous silicon (a-Si) thin-film-transistor liquid-crystal display (TFT-LCD) pixel is presented. The electro-optical model combines the electrical properties of the switching element and the optical performance of a twisted nematic (TN) liquid-crystal cell.Publicad

Blue organic seven segment display based on poly (9,9-dioctyfluorene)with β-phase emission

In this work, organic seven segment displays based on poly(9,9-dioctyfluorene), PFO, have been fabricated. PFO has consolidated as an attractive material for PLEDs due to its efficient blue emission [1] and high hole mobility. Additionally, PFO has a particular conformation, called β-phase associated to extended PFO chain conformation, which is of great interest for potential device applications because, among all others, it has the highest photoluminescence quantum efficiency [2] and the best colour stability [3]. The structure fabricated uses Indium Tin Oxide (ITO) as anode, Poly(3,4 -ethylenedioxythiophene) /poly(4- styrenesulfonate) (PEDOT:PSS) as hole transport layer and Ba:Al as cathode. After thoroughly cleaning the substrates (covered with ITO) a photolithography process is carried out in order to pattern the anode. Next, the organic layers (PEDOTT:PSS and PFO) are spin casted. Finally, metals (Ba~30 nm and Al~100 nm) are thermally evaporated in an atmosphere of 6x10 -6 Torr. PFO is dissolved in toluene at 1 % wt. A detailed description of the fabrication process can be found in [4]. Finally, the device is encapsulated (using an epoxy and a glass tap) and contacts are indium soldered on the pads. In figure 1, we can observe the shadow mask used for the anode photolitography process (left) and the final device lighting in a zero configuration (right)

San Pedro Martir observations of microvariability in obscured quasars

Fast brightness variations are a unique tool to probe the innermost regions of active galactic nuclei (AGN). These variations are called microvariability or intra-night variability, and this phenomenon has been monitored in samples of blazars and unobscured AGNs. Detecting optical microvariations in targets hidden by the obscuring torus is a challenging task because the region responsible for the variations is hidden from our sight. However, there have been reports of fast variations in obscured Seyfert galaxies in X-rays, which rises the question whether microvariations can also be detected in obscured AGNs in the optical regime. Because the expected variations are very small and can easily be lost within the noise, the analysis requires a statistical approach. We report the use of a one-way analysis of variance, ANOVA, with which we searched for microvariability. ANOVA was successfully employed in previous studies of unobscured AGNs. As a result, we found microvariable events during three observing blocks: in two we observed the same object (Mrk 477), and in another, J0759+5050. The results on Mrk 477 confirm previous findings. However, since Mrk 477 is quite a peculiar target with hidden broad-line regions, we cannot rule out the possibility that we have serendipitously chosen a target prone to variations.Comment: Research note, 5 pages, 2 figures, accepted for publication in Astronomy and Astrophysic

Using annotation and specialised electronic corpora to facilite the reading of journal aricles in the filed of Law. Póster

A comprehensive analysis of any professional genre must consider and integrate text-internal as well as text-external aspects of language use (Bhatia, 2004). Beyond the well-known difficulties of legal language (Bhatia, 1982) and its main features (Alcaraz Varó, 2002), the rhetorical structure of a RA is a reflection of the professional practices of scholars in the field of law. Linguists consider that a genre is an instance of a sociolinguistic activity through which members of certain discourse community achieve their communicative purposes (Swales, 1990). A genre is defined then by its shared communicative purposes and manifested by its particular structural and linguistic features. The Research Article (RA) is the main channel of scientific or scholarly communication, which turns it into the target genre for PhD candidates in law.Campus Mare Nostrum, Universidad Politécnica de Cartagena, Universidad de Murcia, Región de Murci

The role of corpus linguistics in developing innovation in data-driven language learning

[SPA]El data-driven learning o aprendizaje basado en datos se caracteriza por el uso de bases de datos de lengua en uso que los alumnos analizan para identificar patrones de uso. El aprendizaje a partir de datos encaja a la perfección dentro de los nuevos paradigmas de enseñanza y se ajusta a lo que se conoce como aprendizaje en el S.XXI o aprendizaje para la vida. En este nuevo escenario docentes y discentes deben adoptar nuevos roles. Los alumnos deben hacerse responsables de su propio aprendizaje y deben actuar como agentes activos en el proceso de aprendizaje y no como meros receptores de información. Por su parte, los profesores se convierten en guías o en facilitadores del proceso. Al hacer a los alumnos comportarse como investigadores, el aprendizaje a partir de datos es, por lo tanto, un ejemplo representativo de aprendizaje centrado en el alumno. Además, este enfoque promueve el aprendizaje inductivo, ya que el análisis de datos, la formulación de hipótesis y la extracción de conclusiones son los tres pilares en los que éste se sustenta. A pesar de los beneficios derivados de esta metodología de trabajo basada en corpus lingüísticos, sus aplicaciones en el aula se han basado tradicionalmente en la transferencia directa de los métodos y las herramientas que se usan para el análisis de la lengua en el ámbito investigador, lo que causa problemas para la implantación y expansión de esta metodología en contextos educativos. El tipo de aprendizaje basado en datos que proponemos en este trabajo está basado en un enfoque novedoso en lo concerniente al modo en el que los datos lingüísticos son tratados por los investigadores/profesores y por los alumnos. El uso de un nuevo modelo que favorezca una transformación de datos en información significativa para los alumnos es la clave de nuestra forma de abordar la innovación educativa en el aprendizaje de lenguas. Los proyectos europeos, SACODEYL y Corpora for Content and Language Integrated Learning, son buena muestra de experiencias de innovación en el campo del aprendizaje para la vida. [ENG]Data Driven (language) Learning (DDL) is characterized by the use of language data in the language learning classroom so that students can analyse language and identify patterns of use. DDL fits well with contemporary learning paradigms and with the so-called 21st C learning or lifelong learning, which implies a new attitude on the part of students and teachers. In this new scenario, students need to take responsibility over their own learning and become active learners, and not mere recipients of information. Teachers turn themselves into guides and facilitators of the learning process. In making students work as researchers, DDL is therefore a representative example of learner-centred teaching. Moreover, this approach fosters inductive learning, as the process of analyzing data, formulating hypotheses and deriving conclusions is at the heart of this approach. However, classroom applications of traditional corpus linguistics have relied on heavy linguistic research paradigms, which according to different authors has problematized the use of this methodology. In the context of our proposal, the data-driven culture that we want to foster is based on a totally new approach to the way in which language data are treated by researchers/teachers and learners. The use of a new data model which favours a more rapid transformation into information which is meaningful to learners is at the hub of our approach to innovation. Two European projects, SACODEYL and Corpora for Content Language Integrated Learning are examples of innovation in the field of lifelong learning.Campus Mare Nostrum, Universidad Politécnica de Cartagena, Universidad de Murcia, Región de Murci

High-throughput wide dynamic range procedure for the simultaneous quantification of nicotine and cotinine in multiple biological matrices using hydrophilic interaction liquid chromatography-tandem mass spectrometry

A straightforward, high-throughput method was developed and fully validated for the simultaneous determination of the specific tobacco biomarkers nicotine and its main metabolite cotinine in a wide dynamic range and supporting the most common human biological matrices (urine, oral fluid and hair). Sample preparation was performed inside the very HPLC injection vials by pipetting 0.5 mL of the liquid samples, deuterated internal standards in alkaline solution and dichloromethane as extraction solvent. Solid samples (i.e. around 10 mg hair) were first submitted to alkaline digestion in the HPLC vials and processed accordingly. The organic phase (reached through the upper aqueous layer) was directly injected without further treatment. Instrumental analysis was performed using hydrophilic interaction (HILIC) ultra-high performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS). Total chromatographic time was 2 min. The method covers a wide dynamic range making it fit-for-purpose for the analysis of samples covering entire populations, irrespective of the level of exposure or tobacco use. Calibration curves (r 2 > 0.995) covered the range 1-2000 ng/mL (or 0.05-100 ng/mg hair) for nicotine and 0.1-2000 ng/mL (or 0.005-100 ng/mg hair) for cotinine. Within-run and between-run precision and accuracy were typically below 10 %, and always below 20 % at the lower limit of quantification. The method was successfully applied to the analysis of samples from different projects involving multiple matrices

Geomatic methods applied to the change study of the la Paúl Rock Glacier, Spanish Pyrenees

Producción CientíficaRock glaciers are one of the most important features of the mountain permafrost in the Pyrenees. La Paúl is an active rock glacier located in the north face of the Posets massif in the La Paúl glacier cirque (Spanish Pyrenees). This study presents the preliminary results of the La Paúl rock glacier monitoring works carried out through two geomatic technologies since 2013: Global Navigation Satellite System (GNSS) receivers and Terrestrial Laser Scanning (TLS) devices. Displacements measured on the rock glacier surface have demonstrated both the activity of the rock glacier and the utility of this equipment for the rock glaciers dynamic analysis. The glacier has exhibited the fastest displacements on its west side (over 35 cm yr-1), affected by the Little Ice Age, and frontal area (over 25 cm yr-1). As an indicator of permafrost in marginal environments and its peculiar morphology, La Paúl rock glacier encourages a more prolonged study and to the application of more geomatic techniques for its detailed analysis.Ministerio de Economía, Industria y Competitividad - Fondo Europeo de Desarrollo Regional (project CGL2015-68144-R)Junta de Extremadura - Fondo Europeo de Desarrollo Regional (project GR10071