Output Power and Gain Monitoring in RF CMOS Class A Power Amplifiers by Thermal Imaging

© 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes,creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.The viability of using off-chip single-shot imaging techniques for local thermal testing in integrated Radio Frequency (RF) power amplifiers (PA’s) is analyzed. With this approach, the frequency response of the output power and power gain of a Class A RF PA is measured, also deriving information about the intrinsic operation of its transistors. To carry out this case study, the PA is heterodynally driven, and its electrical behavior is down converted into a lower frequency thermal field acquirable with an InfraRed Lock-In Thermography (IR-LIT) system. After discussing the theory, the feasibility of the proposed approach is demonstrated and assessed with thermal sensors monolithically integrated in the PA. As crucial advantages to RF-testing, this local approach is noninvasive and demands less complex instrumentation than the mainstream commercially available solutions.Peer ReviewedPostprint (author's final draft

Residence Time Analysis in the Albufera of Valencia, a Mediterranean Coastal Lagoon, Spain

The Albufera of Valencia is a coastal lagoon located in the western area of the Mediterranean Sea, in the Iberian Peninsula. It has an area of 23.1 km2 and an average depth of only 1 m, with a maximum depth of 1.6 m. This lagoon is the remnants of an original and more extensive wetland of about 220 km2 which is now mostly dedicated to rice cultivation. Surface water is supplied through several main and many secondary canals for a total of 64 water entry points and three exit points to the sea. It is difficult to evaluate the residence time due to the lack of reliable measurements of the inflow or outflow, as well as continuous measurements. Between 1988 and 2018, several procedures were used, the results of which are outlined in this document. Overall, a decrease in the inflow during these thirty years was observed and, therefore, it can be concluded that the residence time is increasing. There is a temporal variation during the year due to rainfall and cultivation periods. Likewise, the results found that the natural hydrological zoning of the lagoon causes a spatial heterogeneity with small Northern areas with low residence time of 4.7 days, almost on a weekly basis and large Western extensions with high residence time of 222.9 days. It is impossible to know this information if individual flow measurements are not taken from each of the main watercourses

Towards the Combination of C2RCC Processors for Improving Water Quality Retrieval in Inland and Coastal Areas

Sentinel-2 offers great potential for monitoring water quality in inland and coastal waters. However, atmospheric correction in these waters is challenging, and there is no standardized approach yet, but different methods coexist under constant development. The atmospheric correction Case 2 Regional Coast Colour (C2RCC) processor has been recently updated with the C2X-COMPLEX (C2XC). This study is one of the first attempts at exploring its performance, in comparison with C2RCC and C2X, in inland and coastal waters in the east of the Iberian Peninsula, in retrieving water surface reflectance and estimating chlorophyll-a ([Chl-a]), total suspended matter ([TSM]), and Secchi disk depth (ZSD). The relationship between in situ ZSD and Kd_z90max product (i.e., the depth of the water column from which 90% of the water-leaving irradiance is derived) of the C2RCC processors demonstrated the potential of this product for estimating water clarity (r > 0.75). However, [TSM] and [Chl-a] derived from the different processors with default calibration factors were not suitable within the targeted scenarios, requiring recalibration based on optical water types or a shift to dynamic algorithm blending approaches. This would benefit from switching between C2RCC and C2XC, which extends the potential for improving surface reflectance estimates to a wide range of scenarios and suggests a promising future for C2-Nets in operational monitoring of water quality.info:eu-repo/semantics/publishedVersio

CPT1C in the ventromedial nucleus of the hypothalamus is necessary for brown fat thermogenesis activation in obesity

OBJECTIVE: Carnitine palmitoyltransferase 1C (CPT1C) is implicated in central regulation of energy homeostasis. Our aim was to investigate whether CPT1C in the ventromedial nucleus of the hypothalamus (VMH) is involved in the activation of brown adipose tissue (BAT) thermogenesis in the early stages of diet-induced obesity. METHODS: CPT1C KO and wild type (WT) mice were exposed to short-term high-fat (HF) diet feeding or to intracerebroventricular leptin administration and BAT thermogenesis activation was evaluated. Body weight, adiposity, food intake, and leptinemia were also assayed. RESULTS: Under 7 days of HF diet, WT mice showed a maximum activation peak of BAT thermogenesis that counteracted obesity development, whereas this activation was impaired in CPT1C KO mice. KO animals evidenced higher body weight, adiposity, hyperleptinemia, ER stress, and disrupted hypothalamic leptin signaling. Leptin-induced BAT thermogenesis was abolished in KO mice. These results indicate an earlier onset leptin resistance in CPT1C KO mice. Since AMPK in the VMH is crucial in the regulation of BAT thermogenesis, we analyzed if CPT1C was a downstream factor of this pathway. Genetic inactivation of AMPK within the VMH was unable to induce BAT thermogenesis and body weight loss in KO mice, indicating that CPT1C is likely downstream AMPK in the central mechanism modulating thermogenesis within the VMH. Quite opposite, the expression of CPT1C in the VMH restored the phenotype. CONCLUSION: CPT1C is necessary for the activation of BAT thermogenesis driven by leptin, HF diet exposure, and AMPK inhibition within the VMH. This study underscores the importance of CPT1C in the activation of BAT thermogenesis to counteract diet-induced obesity. Copyright © 2018 The Authors. Published by Elsevier GmbH.. All rights reserved. KEYWORDS: Brown adipose tissue; CPT1C; Diet-induced obesity; Hypothalamus; Thermogenesi

Bases per a la Gestió del Paisatge de la Serra de Tramuntana : 13 propostes i 55 projectes

Màster Oficial en Estudis Territorials i de la Població. Departament de Geografia, Universitat Autònoma de Barcelona, Programa troncal 2013-2014, Gener 2014Coordinació projecte Troncal: Oriol Nel·lo ColomMòduls docents: Ordenació, Planejament i Gestió del Territori: Oriol Nel·lo Colom, Rufí Cerdán Heredia -- Temes Avançats: Enric Mendizàbal Riera, Albert Pèlachs Mañosa -- Sistemes d'Informació Geogràfica, Planejament i Paisatge: Anna Badia Perpinyà, Albert Pèlachs Mañosa -- Ciutat i Espais Metropolitans: Àngel Cebollada Frontera, Carles Donat MuñozCoordinació continguts: Esteve Dot JutglaConferenciants: Vicent Maria Rosselló Verger, Juli Esteban Noguera, Ricard Pié Ninot, Xavier Campillo Besses, Pere Sala Martí, Joan Nogué FontConferenciants de Mallorca: Miquel Grimalt (Director del Departament de Ciències de la Terra, Universitat de les Illes Balears), Onofre Rullan (Departament de Ciències de la Terra, Universitat de les Illes Balears), Jaume Mateu (Departament de Ciències de la Terra,Universitat de les Illes Balears), Maria Lluïsa Dubon (geògrafa), Bartomeu Deyà (Director gerent del Consorci Serra de Tramuntana Patrimoni Mundial), Miquel Rayó (escriptor), Sebastià Torrens (fotògraf), Joan Sastre (escriptor), Vicenç Sastre (escriptor)Redactors: Grup1: Sara González Pérez, Antón Magarolas Navarro, Ilaria Sanna -- Grup2: Giulia Garolla, Alberto Innocenti, Javier Martín Úceda, Dalila Serusi -- Grup 3: Francesco Finotto, Maria Lidmäe, Sara Serilli, María Torres Bagur -- Grup 4: Giulia Battiston, Sergi Del Olmo Parisi, Elena Vettoretti, Rafael Vicente Salar -- Grup 5: Roberta Fadda, Daniela Pinna, Gloria Veloz, Francesc Vila Palà -- Grup 6: Fernanda Avellaneda Viteri, Giulia Cubadda, Xavier Delclòs Alió, Francesco Luigi FerrariEl Màster d'Estudis Territorials i de la Població és un programa de postgrau del Departament de Geografia de la Universitat Autònoma de Barcelona que té per objectiu la formació de professionals en el camp de la demografia, el planejament i l'ordenació del territori. En el seu itinerari d'Estudis Territorials, el programa ofereix una orientació essencialment aplicada, de tal manera que inclou un exercici troncal en el que els participants elaboren, en equip, amb finalitats didàctiques i sota la direcció dels docents, un document de planejament que compta amb tots els elements d'una proposta professional de planejament. Enguany, el tema escollit per a l'exercici troncal ha estat el reconeixement territorial i la redacció d'una proposta per a la gestió del paisatge de la Serra de Tramuntana de Mallorca. El document que teniu a les mans és el resultat de l'exercici, en el qual 23 alumnes, procedents de 4 països diversos, dividits en 6 equips, i sota la direcció de 10 professors, han redactat efectivament unes Bases per a la Gestió del Paisatge de la Serra de Tramuntana. El document resultant, conté, tal com s'ha indicat, tots els elements propis d'un document d'ordenació del territori: Memòria, Valoració, Diagnosi, Objectius, Propostes i Projectes. D'acord amb les característiques del programa, l'exercici s'ha realitzat a partir d'una voluntat d'integració dels continguts, transversalitat de les propostes, contextualització dels ensenyaments teòrics i un mètode aplicat, en el que han tingut un paper central el treball de camp i el treball en grup. Per això, s'han integrat els quatre mòduls que configuren el primer semestre del Màster en un sol programa i calendari d'ensenyaments i activitats, d'acord amb allò que figura en el Quadern Troncal que podreu trobar al final d'aquest volum