65,101 research outputs found
A high-resolution gridded dataset of daily temperature and precipitation records (1980-2018) for Trentino-South Tyrol (north-eastern Italian Alps)
No full textA high-resolution gridded dataset of daily mean temperature and precipitation series spanning the period 1980-2018 was built for Trentino-South Tyrol, a mountainous region in north-eastern Italy, starting from an archive of observation series from more than 200 meteorological stations and covering the regional domain and surrounding countries. The original station data underwent a processing chain including quality and consistency checks, homogeneity tests, with the homogenization of the most relevant breaks in the series, and a filling procedure of daily gaps aiming at maximizing the data availability. Using the processed database, an anomaly-based interpolation scheme was applied to project the daily station observations of mean temperature and precipitation onto a regular grid of 250g mg ×g 250g m resolution. The accuracy of the resulting dataset was evaluated by leave-one-out station cross-validation. Averaged over all sites, interpolated daily temperature and precipitation show no bias, with a mean absolute error (MAE) of about 1.5g g C and 1.1g mm and a mean correlation of 0.97 and 0.91, respectively. The obtained daily fields were used to discuss the spatial representation of selected past events and the distribution of the main climatological features over the region, which shows the role of the mountainous terrain in defining the temperature and precipitation gradients. In addition, the suitability of the dataset to be combined with other high-resolution products was evaluated through a comparison of the gridded observations with snow-cover maps from remote sensing observations. The presented dataset provides an accurate insight into the spatio-temporal distribution of temperature and precipitation over the mountainous terrain of Trentino-South Tyrol and a valuable support for local and regional applications of climate variability and change. The dataset is publicly available at 10.1594/PANGAEA.924502 (Crespi et al., 2020)
Assisted Code Point Positioning at Sub-meter Accuracy Level with Ionospheric Corrections Estimated in a Local GNSS Permanent Network
No full textIt is well know that GNSS permanent networks for real-time positioning with stations spaced at few tens of kilometers in the average were mainly designed to generate and transmit products for RTK (or Network-RTK) positioning. In this context, RTK products are restricted to users equipped with geodetic-class receivers which are continuously linked to the network processing center through Internet plus mobile phone. This work is a first step toward using a local network of permanent GNSS stations to generate and make available products devoted to ionospheric delay correction that could remarkably improve positioning accuracy for C/A receiver users, without forcing them to keep a continuous link with the network. A simple experiment was carried out based on data from the RESNAP-GPS network (w3.uniroma1.it/resnap-gps), located in the Lazio Region (Central Italy) and managed by DITS-Area di Geodesia e Geomatica, University of Rome "Sapienza". C/A raw observations were processed with Bernese 5.0 CODSPP module (single point positioning based on code measurements) using IGS precise ephemeris and clocks. Further, the RINEX files were corrected for the Differential Code Biases (DCBs) according to IGS recommendations. One position per epoch (every 30 s) was estimated from C/A code; the vertical coordinate errors showed a typical signature due to the ionospheric activity: higher errors for day-time (up to 5 m) and smaller ones for night-time (around 1.5 m). In order to improve the accuracy of the solution, ionospheric corrections were estimated using the La Plata Ionospheric Model, based on the dual-frequency observations from the RESNAP-GPS network. This procedure allowed to reduce horizontal and vertical errors within 0.5 m (CE95) and 1 m (LE95) respectively. Finally, the possibility to predict the ionospheric model for few hours was preliminary checked. Our approach shows the possibility of a novel use of the measurements collected by GNSS permanent networks designed for real-time positioning services, which can assist and remarkably improve the C/A code real-time positioning supplying off-line predicted ionospheric corrections, acting as a local Ground Based Augmentation System
Determination of substances of abuse in biological fluids by GC/MS using chemical ionization with acetonitrile
No full textGC/ms is an important method to determine drugs in biological fluids. For each of the most commonly used drugs a methanolic solution (100 μg/ml) was prepared; 30 μl of each solution was evaporated using nitrogen flow and than diluted in 100 ml of a derivatizing mixture constituted by MSTFA and toluene (30/70). After a short reaction time at room temperature 1 ml of each solution was injected into a SE-52 column (15 m x 0.25 mm) using chemical ionization with acetonitrile. This method has a good signal/noise ratio and is very useful in screening techniques
Experimental behaviour of full-scale C-wall under out-of-plane loading
No full textEarthquakes are among the major threats of existing masonry buildings, as proved by the damage recorded after recent seismic events. Out-of-plane failure mechanisms were often observed, which were strictly related to the lack of an effective connection between the load resisting elements. For this reason, the retrofitting interventions aimed to achieve a box-like behaviour of the building are of great interest. This paper presents an experimental campaign focused on the strengthening technique using fasteners to retrofit wall intersections. Full scale tests on masonry C-wall brickwork of solid clay bricks strengthened with twisted stainless-steel bars and bonded fasteners were executed. The unreinforced specimen was built with weak bonding at the two orthogonal wall intersection and out-of-plane loaded until cracking and corresponding load drop. After that, the cracked wall intersections were strengthened using the different fasteners, with deep embedment and different angles, bridging the cracks. Additional bars were used to stitch bending cracks on the front wall. The wall was cyclically loaded out-of-plane. The test results showed a significant increase both in load capacity and ductility which can be achieved depending on the type of fasteners used
Un raro caso di mesotelioma multicistico del peritoneo associato ad aumento di CA 125 e CA 19.9 nel siero
No full textMarkedly increased CA 125 and CA 19.9 concentrations in serum are considered specific
enough to reliably identify malignant cancers (ovarian and gastrointestinal tumours, respectively), although a
consistent body of literature has reported marker elevations in several benign conditions. Here we report the case of a woman in post-menopausal status, with a previous history of hysterectomy, presenting with a 12-cm pelvic mass at sonography and serum CA 125 and CA 19.9 concentrations >400 kU/L. One month after initial presentation, she underwent surgical evaluation for laparoscopy, repeating marker determinations. Concentrations of CA 125 and CA 19.9 were still elevated, but decreased if compared with the previous data (~200 kU/L). Magnetic resonance imaging
characterized a multicystic mass in the mesentery, allowing to hypothesize a benign multicystic mesothelioma of the
peritoneum (BMMP). The laparoscopy revealed multiple cysts, some of them resulting in colliquation, associated to
ascites. Histological examination of biopsy specimens confirmed BMMP as composed of multiple, thin-walled,
irregularly spaced cysts lined by flattened and cuboidal mesothelial cells. The cystic colliquation was though as the main cause for decrease in marker concentrations. To our knowledge, this is the first case of BMMP associated with significantly increased concentrations of CA 125 and CA 19.9 and their decrease before any surgical treatment
Brain abscess of odontogenic origin: two cases report and review of the literature
No full textBrain abscesses are rare, life-threatening infections: odontogenic origin is rarely advocate as the cause of these infections. Neurological manifestation which depend on the involved site (i.e. epilepsy, hemiparesis, hemiparesthesia, aphasia, depressed consciousness) are accompained by systemic symptoms such malaise and fever; mortality rate is high (almost 50%). The identification of causal organism can be difficult and the odontogenic origin is often an exclusion diagnosis. Therapy should be started as soon as possible in order to prevent the rapid diffusion to the rest of the brain: recovery might happen with mild-moderate residual neurological deficit. We present two new cases of brain abscesses; Case 1: a 9-year-old boy with a frontal abscess presented multiple dental foci; a CT scan demonstrated the diffusion to the brain through maxillary and ethmoidal sinuses. Case 2: a 60-year-old female presented with cerebral brain abscess: she was under steroid therapy for reumatoid artritis; a panorex revealed numerous dental foci. No other foci were found in both patients. Due to their rarity, brain abscesses of odontogenic origin are difficult to diagnose: a thorough oro-maxillofacial investigation should always be performed in order to exclude this origin
I am also otherness: challenging normalizing education
No full textBibliografía:
• Almeida, M. y Angelino, A. (2014). De la inclusión educativa como política a la ética de la hospitalidad. Notas para el debate. En: Psicología, Conocimiento y Sociedad, Vol. 4, Núm. 2, pp. 10–27. Recuperado de: http://revista.psico.edu.uy/index.php/ revpsicologia/article/view/215/214
• Althusser, L. (1988) Ideología y Aparatos Ideológicos del Estado. Buenos Aires: Nueva Visión. Arnau, S. (2016). Teoría Crip: de la segregación a la inclusión, transitando por la re-apropiación y re-significación. Rev. Pasajes, 2, pp. 48-65.
• Barrán, J.P. (1989). Historia de la sensibilidad en el Uruguay. Montevideo: Ediciones de la Banda Oriental.
• Bello, a. (2018). Hacia una trans-pedagogía: reflexiones educativas para incomodar, sanar y construir comunidad. Debate feminista, 55, pp. 104-128.
• Bourdieu, P. y Passeron, J.C. (1979). La reproducción. Barcelona: Editorial Laia. Britzman, D. (2016). ¿Hay una pedagogía queer? O no seas tan recto, Revista de Educación, 9. pp. 13-34.
• Carbonell y Migal, A. (1929). Historia, Organización y administración de la escuela uruguaya, Montevideo: A. Monteverde.
• Chiarino, N. (2017). Otra mirada a la problemática bullying : aportes desde el enfoque sistémico: estudio de caso en un liceo de Montevideo. Tesis de maestría. Facultad de Psicología. Universidad de la República (Montevideo, Uruguay). Recuperado de: https://hdl.handle.net/20.500.12008/18172
• Flores, V. (2013). interruqciones. Ensayos de poética activista. Escritura, política y educación. Neuquén. La Mondonga Dark.
• Flores, V. (2016). Afectos, pedagogías, infancia y heteronormatividad. Pedagogías transgresoras. Santa Fe: Bocavulvaria ediciones
• Freire, P. (1970). La pedagogía del oprimido. México: Siglo XXI. Guerra, I. (2021). Lucha contra el capacitismo. Madrid: Imperdible Editorial.
• Honneth, A. (1997). La lucha por el reconocimiento: por una gramática moral de los conflictos sociales. Barcelona: Crítica.
• Honneth, A. (2010). Reconocimiento y menosprecio. Sobre la fundamentación normativa de una teoría social. Buenos Aires: Katz
• Hoocks, b. (2017). El feminismo es para todo el mundo. Madrid: Traficantes de Sueños.
• Janoario, R. (2020). Não basta ser contra o racismo é preciso ser antirracista. En: Janoario, R. y Peluso, L. (Comp.) (2020). Apuntes para deconstruir la ideología de la normalidad. Montevideo, Área de Estudios Sordos/FHCE/UdelaR, pp.191- 205 Recuperado de: http://www.tuilsu.edu.uy/biblioteca/espanol/ janoarioypeluso2020.pdf .
• Lema, C. (2017). La experiencia educativa en adolescentes y jóvenes con riesgo de desafiliación. El caso programa de Impulso a la Universalización del Ciclo Básico. En: Plachot, G. y Fachinetti, V. (Coordinadoras) Educación y Psicología en el siglo XXI. Experiencia educativa en construcción (pp. 89-104). Montevideo: Ediciones Universitarias, CSIC.
• Olweus, D. (1998). Conductas de acoso y amenazas entre escolares. Madrid: Morata Peluso, L. (2020). Diversidad, discapacidad, minoridad y disidencia: entre la ideología de la normalidad y las luchas por el reconocimiento.
En: Janoario, R. y Peluso, L. (Comp.) (2020). Apuntes para deconstruir la ideología de la normalidad. Montevideo, Área de Estudios Sordos/FHCE/UdelaR, pp. 59- 90 Recuperado de: http://www.tuilsu.edu.uy/biblioteca/espanol/ janoarioypeluso2020.pdf
• Pichardo, J.I. (coord.) (2013). Diversidad sexual y convivencia: una oportunidad educativa. Madrid: UCM.
• Pichón-Rivière, E. (1999). El proceso grupal. Buenos Aires: Nueva Visión. Platero, L. (2012). Intersecciones: cuerpos y sexualidades en la Visión.
• Platero, L. (2012). Intersecciones: cuerpos y sexualidades en la encrucijada. Barcelona: Bellaterra.
• Platero, L. (2015). Pedagogías trans*formadoras. Políticas, prácticas y pedagogías trans. Barcelona: UOC.
• Preciado, P. (2019). Un apartamento en Urano. Barcelona: Anagrama.
• Sánchez Sáinz, M., Penna Tosso, M. y de la Rosa Rodríguez, B. (2016). Somos como somos. Deconstruyendo y transformando la escuela. Madrid: La Catarata. Sánchez Sáinz, M. (2019). Pedagogías queer ¿nos arriesgamos a hacer otra educación?
• Solá, M. y Urko, E. (2013). Transfeminismos. Episteme, fricciones y flujos. Navarra: Txalaparta.
• Torres, J. (2017). Políticas educativas y construcción de personalidades neoliberales y neocolonialistas. Madrid: Morata.
• Walsh, C. (2007). Interculturalidad, colonialidad y educación, Revista Educación y Pedagogía, Medellín, Universidad de Antioquia, Facultad de Educación, vol. XIX, núm. 48, pp. 25-35. VVAA (2020). Transfeminismo o barbarie. Madrid: Kaótica Libros¡Tú no vales marichico, esto es para chicos de verdad! ¡Con nosotras no marichico, que nos miras raro! Esto lo escuchaba como maestra en el recreo de manera persistente hacia una niña muy masculina a la que le gustaba el fútbol. Yo le decía que mejor hiciera cosas de niñas, que vistiera más femenina, así evitaría esos comentarios y podría tener amigas. La cosa iba a peor, en ocasiones le bajaban los pantalones para ver qué tenía entre las piernas, hoy ha sido francamente grave, la han empujado escaleras abajo. Son situaciones habituales en la escuela, más o menos explícitas, más o menos serias. A veces es una sola persona la que oprime, otras veces la clase al completo. Las situaciones son variadas: por no ser capaz de hacer algo, por saltarse lo establecido para su género, por su cuerpo, por su color de piel…Depto. de Estudios EducativosFac. de EducaciónTRUEpu
Identifying Amidyl Radicals for Intermolecular C-H Functionalizations
No full textRecent studies have demonstrated the capabilities of amidyl radicals to facilitate a range of intermolecular functionalizations of unactivated, aliphatic C-H bonds. Relatively little information is known regarding the important structural and electronic features of amidyl and related radicals that impart efficient reactivity. Herein, we evaluate a diverse range of nitrogen-centered radicals in unactivated, aliphatic C-H chlorinations. These studies establish the salient features of nitrogen-centered radicals critical to these reactions in order to expedite the future development of new site-selective, intermolecular C-H functionalizations
Resonance of steel wind turbines: Problems and solutions
No full textThis paper deals with an experimental and numerical dynamic characterization of two steel wind turbines currently located in Italy. The considered steel turbines are onshore and were originally built more than 20 years ago with 65 m of height (from the ground level to the hub). Five years ago, they were unmounted and reassembled in the present location. During this phase, due to local and national environmental prescriptions, they were shortened to about 45 m (hub height). Unfortunately, this procedure generated a huge problem in their structural behaviour: the fundamental frequency of vibration of both the “shorter” steel turbines become close to the working frequency of their rotors, causing a resonance problem.
To evaluate exactly the turbine frequencies and modal shapes, structural monitoring involving several accelerometers has been implemented. Then, numerical finite element models (FEM) have been developed to investigate the influence of the soil-structure interaction (SSI) on the dynamic behaviour of these structures. Finally, two practical solutions to overcome the resonance problem are proposed and discussed.
Since the investigated problems can arise for any worldwide wind turbine, the proposed solutions are of general validity and can be extended to many other different cases
- …
