644 research outputs found
Dodatni nalazi šarene ugorove majke Gaidropsarus granti(Actinopterygii: Gadiformes: Lotidae) u Jonskom moru
Two specimens of the Grant’s rockling Gaidropsarus granti (Regan, 1903) were caught in the Ionian Sea, just south of the Strait of Messina (Italy) in December 2016. Their body colouration pattern is consistent with that reported in the literature for this species. These specimens were described and illustrated.Dva primjerka Gaidropsarus granti (Regan, 1903) ulovljena su u Jonskom moru, južno od Mesinskog tjesnaca (Italija) u prosincu 2016. Njihov uzorak obojenosti tijela je u skladu s onim iz literature za ovu vrstu. Ti su uzorci opisani i prikazani u radu
Microalgae cultivation for lipids and carbohydrates production
Microalgae are photoautotrophic microorganisms that can produce energy both by using sunlight, water and CO2 (phototrophic metabolism) and by using organic sources such as glucose (heterotrophic metabolism). Heterotrophic growth is a key factor in microalgae research, due to its increased productivity and the lower capital and operative costs compared to photoautotrophic growth in photobioreactors. Carbohydrate production from microalgae is usually investigated for the production of biofuels (e.g. bioethanol) by successive fermentation, but also other applications can be envisaged in biopolymers. In this work an increment in carbohydrate purity after lipid extraction was found. Protein hydrolysis for different microalgae strains (Scenedesmus sp. and Chlorella sp.) was investigated. Microalgae were cultivated under photoautotrophic or heterotrophic conditions, collecting biomass at the end of the growth. Biomass samples were dried or freeze dried and used for carbohydrate and lipid extraction tests. Lipid extraction was achieved using different organic solvents (methanol-chloroform and hexane-2propanol). Basic protein hydrolysis has been carried out testing different temperatures and NaOH concentrations values. Lipids were spectrophotometrically quantified, while residual biomass was saccharificated and the total amount of sugars was measured. Significant differences about the purity of extracted carbohydrates were found comparing dried with freeze dried biomass. However, not a very promising purification of carbohydrates was achieved after protein hydrolysis, asking for further analysis. © Copyright 2017, AIDIC Servizi S.r.l
Probabilistic electric load forecasting through Bayesian Mixture Density Networks
Probabilistic load forecasting (PLF) is a key component in the extended
tool-chain required for efficient management of smart energy grids. Neural
networks are widely considered to achieve improved prediction performances,
supporting highly flexible mappings of complex relationships between the target
and the conditioning variables set. However, obtaining comprehensive predictive
uncertainties from such black-box models is still a challenging and unsolved
problem. In this work, we propose a novel PLF approach, framed on Bayesian
Mixture Density Networks. Both aleatoric and epistemic uncertainty sources are
encompassed within the model predictions, inferring general conditional
densities, depending on the input features, within an end-to-end training
framework. To achieve reliable and computationally scalable estimators of the
posterior distributions, both Mean Field variational inference and deep
ensembles are integrated. Experiments have been performed on household
short-term load forecasting tasks, showing the capability of the proposed
method to achieve robust performances in different operating conditions.Comment: 56 page
A new nearctic species of Atrichopogon (Melohelea) and a redescription of Atrichopogon (M.) chilensis Ingram & Macfie (Diptera: Ceratopogonidae)
A new species of Ceratopogonidae from Canada, Atrichopogon (Meloehelea) ladislavi Tóthová, is described. The Patagonian species Atrichopogon (M.) chilensis Ingram & Macfie is restored from synonymy, its female is redescribed and the male is described for the first time.Fil: Tóthová, Andrea. Masaryk University; República ChecaFil: Spinelli, Gustavo Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Limnología "Dr. Raúl A. Ringuelet". Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Limnología; ArgentinaFil: Marino, Pablo Ignacio. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Entomología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin
Two new Patagonian species of Atrichopogon (Meloehelea) (Diptera: Ceratopogonidae)
Two new species of the subgenus Atrichopogon (Meloehelea) from Patagonia, Atrichopogon (M.)macrodentatum from the Nothofagus forests, and A. (M.) monomorphicus from steppe areas in the ecotone with forests, are described and a key of the Patagonian species of the subgenus is provided.Fil: Marino, Pablo Ignacio. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Entomología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; ArgentinaFil: Tóthová, Andrea. Masaryk University; República ChecaFil: Spinelli, Gustavo Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Limnología "Dr. Raúl A. Ringuelet". Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Limnología; Argentin
preliminary design of a mw class demo system for co2 capture with mcfc in a university campus cogeneration plant
Abstract One of the most promising, short-term options for efficiently capturing CO 2 from combustion exhaust gases – potentially from any combustion process source - is based on the operating principle of Molten Carbonate Fuel Cells (MCFC): their electrochemical reactions promote the transport of both CO 2 and O 2 molecules from the cathode side (which can be fed with combustion effluents) to the CO 2 -rich atmosphere of the anode side (fed with internally reformed natural gas), by means of a CO 3 2- -ion conducting electrolyte. In the present work, the preliminary design of a 1 MW el MCFC demo plant operating downstream a Combined Heat and Power (CHP) Internal Combustion Engine (ICE) installed at the Politecnico di Milano campus is investigated, with the aim of promoting a valid solution for high efficiency, de-carbonised heat and electricity production. The study envisages two purification strategies for the CO 2 -rich stream at the MCFC anode outlet: i) the CO 2 is separated and compressed in a cryogenic unit and the unconverted fuel is either recycled at the anode inlet or burned and sent to the MCFC cathode inlet ii) the anode exhausts are burned in a catalytic oxy-combustor, increasing both the thermal energy available in the cogeneration unit and the CO 2 concentration in the stream sent to the storage site. Subsequently to a thermodynamic analysis carried out with a 0D model calibrated upon experimental data available for a commercial MCFC unit, the main components are designed by taking into account all the operating constraints of the machines and the CO 2 capture limitations associated to the size of the MCFC modules currently available on the market. Moreover, an economic analysis is performed in order to assess the feasibility of such an installation within the university campus cogeneration grid. As a main finding, the use of MCFCs to capture CO 2 at a distributed generation scale allows reaching interesting energy and environmental performances, highlighted by promising values of the Specific Primary Energy Consumption for CO 2 Avoided (SPECCA=0.9-1.9 MJ/kgCO 2 ) and Carbon Capture Ratios (CCR=68-84%). Within a mid-term perspective for MCFC specific cost, the economic analyses reveal acceptable values for the cost of electricity and the cost of CO 2 avoided, respectively close to 130 €/MWh el and 100 €/tCO 2
La lengua wichí del chaco salteño. Aspectos fonológicos y morfosintácticos
El propósito de la tesis es describir la variedad de la lengua wichí –en todos sus niveles, es decir, fonología, morfosintaxis y léxico– que se habla en un grupo de comunidades ubicadas a orillas del río Pilcomayo, y que no ha sido documentada hasta el momento. Este trabajo está basado en datos primarios recogidos en sucesivos trabajos de campo iniciados en el año 2004.La metodología empleada es la que se utiliza en investigaciones de lingüística aplicada y sociolingüística: el método empírico-inductivo. Para la recolección de datos se emplearon las técnicas propias del trabajo de campo: registros directivos o no directivos. Nuestra investigación sigue los lineamientos teórico-metodológicos del funcionalismo y de los estudios tipológico-funcionales. En cuanto a su organización, se divide en siete capítulos en los que presentamos un panorama sociolingüístico de la lengua, luego trabajamos sobre el reconocimiento de las unidades fonológicas, los morfemas y las clases de palabras. En cuanto a la fonología hemos analizado la tipología silábica y hemos realizado una aproximación a los sistemas acentuales. Por otro lado, analizamos los procesos morfológicos derivativos y compositivos que hemos documentado en nuestro corpus. También las características morfosintácticas de la totalidad de las clases léxicas que identificamos. Finalmente, abordamos el estudio de las estructuras sintácticas: orden de los constituyentes, alineamiento sintáctico, tipos de cláusulas (simples y complejas, aunque no hemos profundizado en esta última). Concluimos que la lengua wichí es de carácter aglutinante y polisintético, con marcación en el núcleo. Asimismo, posee un sistema de alineamiento activo/inactivo que se verifica en los índices pronominales verbales (de tercera persona) que señalan el rol semántico de los participantes. Esto significa que distinguen entre participantes activos o agentivos y pasivos o pacientivos.
Data on joint programming in the European Research Area: An overview of JoREP 2.0 database
RT 05; This technical report provides an insight into the main features and the analytical potential of JoREP 2.0 database, a resource that allows for multifaceted representations of the organisational and financial characteristics of transnational R&D programmes in the European Research Area. Target of the database includes the community of Science and Innovation studies, and all the researchers interested in the study of the Europeanisation of research activities and the dynamics related to transnational R&D funding
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