Optimization of green ammonia distribution systems for intercontinental energy transport

Green ammonia is a promising hydrogen derivative which enables intercontinental transport of dispatchable renewable energy. This research describes the development of a model which optimizes a global green ammonia network, considering the costs of production, storage, and transport. In generating the model, we show economies of scale for green ammonia production are small beyond 1 million tonnes per annum (MMTPA), although benefits accrue up to a production rate of 10 MMTPA if a production facility is serviced by a new port or requires a long pipeline. The model demonstrates that optimal sites for ammonia production require not only an excellent renewable resource but also ample land from which energy can be harvested. Land limitations constrain project size in otherwise optimal locations and force production to more expensive sites. Comparison of current crude oil markets to future ammonia markets reveals a trend away from global supply hubs and toward demand centers serviced by regional production

On autonomic platform-as-a-service: characterisation and conceptual model

In this position paper, we envision a Platform-as-a-Service conceptual and architectural solution for large-scale and data intensive applications. Our architectural approach is based on autonomic principles, therefore, its ultimate goal is to reduce human intervention, the cost, and the perceived complexity by enabling the autonomic platform to manage such applications itself in accordance with highlevel policies. Such policies allow the platform to (i) interpret the application specifications; (ii) to map the specifications onto the target computing infrastructure, so that the applications are executed and their Quality of Service (QoS), as specified in their SLA, enforced; and, most importantly, (iii) to adapt automatically such previously established mappings when unexpected behaviours violate the expected. Such adaptations may involve modifications in the arrangement of the computational infrastructure, i.e. by re-designing a different communication network topology that dictates how computational resources interact, or even the live-migration to a different computational infrastructure. The ultimate goal of these challenges is to (de)provision computational machines, storage and networking links and their required topologies in order to supply for the application the virtualised infrastructure that better meets the SLAs. Generic architectural blueprints and principles have been provided for designing and implementing an autonomic computing system.We revisit them in order to provide a customised and specific viewfor PaaS platforms and integrate emerging paradigms such as DevOps for automate deployments, Monitoring as a Service for accurate and large-scale monitoring, or well-known formalisms such as Petri Nets for building performance models

Femtosecond multichannel photodissociation dynamics of CH3I from the A band by velocity map imaging

4 pages, 3 figures, 1 table.The reaction times of several well-defined channels of the C–I bond rupture of methyl iodide from the A band, which involves nonadiabatic dynamics yielding ground state I(2P3/2) and spin-orbit excited I*(2P1/2) and ground and vibrationally excited CH3 fragments, have been measured by a combination of a femtosecond laser pump-probe scheme and velocity map imaging techniques using resonant detection of ground state CH3 fragments. The reaction times found for the different channels studied are directly related with the nonadiabatic nature of this multidimensional photodissociation reaction.Two of the authors (J. G. I. and J. D.) gratefully acknowledge financial support from the FPI program and the CSIC-Unidades Asociadas program, respectively, of the Spanish Ministry of Education and Science (MEC). This work has been financed by the Spanish MEC through Grant No. CTQ2005-08493- C02-01.Peer reviewe

A femtosecond velocity map imaging study on B-band predissociation in CH 3I. II. the 2 0 1 and 3 0 1 vibronic levels

Femtosecond time-resolved velocity map imaging experiments are reported on several vibronic levels of the second absorption band (B-band) of CH 3I, including vibrational excitation in the 2 and 3 modes of the bound 3R 1(E) Rydberg state. Specific predissociation lifetimes have been determined for the 201 and 301 vibronic levels from measurements of time-resolved I*( 2P 12) and CH 3 fragment images, parent decay, and photoelectron images obtained through both resonant and non-resonant multiphoton ionization. The results are compared with our previously reported predissociation lifetime measurements for the band origin 000 [Gitzinger, J. Chem. Phys. 132, 234313 (2010)10.1063/1.3455207]. The result, previously reported in the literature, where vibrational excitation to the C-I stretching mode ( 3) of the CH 3I 3R 1(E) Rydberg state yields a predissociation lifetime about four times slower than that corresponding to the vibrationless state, whereas predissociation is twice faster if the vibrational excitation is to the umbrella mode ( 2), is confirmed in the present experiments. In addition to the specific vibrational state lifetimes, which were found to be 0.85 0.04 ps and 4.34 0.13 ps for the 201 and 301 vibronic levels, respectively, the time evolution of the fragment anisotropy and the vibrational activity of the CH 3 fragment are presented. Additional striking results found in the present work are the evidence of ground state I( 2P 32) fragment production when excitation is produced specifically to the 301 vibronic level, which is attributed to predissociation via the A-band 1Q 1 potential energy surface, and the indication of a fast adiabatic photodissociation process through the repulsive A-band 3A 1(4E) state, after direct absorption to this state, competing with absorption to the 301 vibronic level of the 3R 1(E) Rydberg state of the B-band.Peer Reviewe

Femtosecond pulsed laser deposition of nanostructured CdS films

In this work, we report an investigation of the properties of nanostructured deposits obtained from femtosecond pulsed laser deposition of CdS sintered targets. Specifically, we address the effects of laser irradiation wavelength, laser fluence, and substrate temperature (from 25 to 450 °C). The composition of the deposits was characterized using X-ray photoelectron spectroscopy (XPS), their crystallinity by X-ray diffraction (XRD), and the surface morphology was studied by environmental scanning electron microscopy (ESEM) and atomic force microscopy (AFM). It has been found that the smallest nanoparticles, with an average diameter of 25 nm and a narrow size distribution, together with particulates in the range of 80-120 nm, are obtained at the shortest laser wavelength of 266 nm on room-temperature substrates. Deposits do not contain microscopic droplets in any of the explored conditions. © 2010 American Chemical Society.Peer Reviewe

Construction of data streams applications from functional, non-functional and resource requirements for electric vehicle aggregators. the COSMOS vision

COSMOS, Computer Science for Complex System Modeling, is a research team that has the mission of bridging the gap between formal methods and real problems. The goal is twofold: (1) a better management of the growing complexity of current systems; (2) a high quality of the implementation reducing the time to market. The COSMOS vision is to prove this approach in non-trivial industrial problems leveraging technologies such as software engineering, cloud computing, or workflows. In particular, we are interested in the technological challenges arising from the Electric Vehicle (EV) industry, around the EV-charging and control IT infrastructure

Notas corológicas del macrofitobentos de Andalucía (España). VIII

La flora de macroalgas marinas de Andalucía se recoge en los catálogos de Flores- Moya et al. (1995a, 1995b) y Conde et al. (1996a), y las adiciones posteriores de Conde et al. (1996b), Báez et al. (2001) y Altamirano et al. (2006, 2008). En este trabajo se presentan 9 citas nuevas para Andalucía (señaladas con un asterisco), 19 citas nuevas para la provincia de Huelva, 9 citas nuevas y una confirmación para la provincia de Málaga y 25 citas nuevas para la provincia de Granada. Mediante esta contribución el catálogo de Chlorophyceae de Andalucía consta de 90 taxones, mientras que los de Phaeophyceae y Rhodophyceae contienen 109 y 356 taxones, respectivamente. Todo el material recolectado se conservó en formol al 4% en agua de mar para su posterior determinación en el laboratorio. Como medio de montaje y preservación de las muestras microscópicas se ha utilizado sirope de maíz al 25% en agua destilada con unas gotas de formol al 4%. Los ejemplares identificados se han depositado en el herbario de la Universidad de Málaga (MGC Phyc). Para la ordenación taxonómica se ha seguido a Guiry & Guiry (2009

A detailed experimental and theoretical study of the femtosecond A -band photodissociation of C H3I

The real time photodissociation dynamics of C H3I from the A band has been studied experimentally and theoretically. Femtosecond pump-probe experiments in combination with velocity map imaging have been carried out to measure the reaction times (clocking) of the different (nonadiabatic) channels of this photodissociation reaction yielding ground and spin-orbit excited states of the I fragment and vibrationless and vibrationally excited (symmetric stretch and umbrella modes) C H3 fragments. The measured reaction times have been rationalized by means of a wave packet calculation on the available ab initio potential energy surfaces for the system using a reduced dimensionality model. A 40 fs delay time has been found experimentally between the channels yielding vibrationless CH3(ν=0) and I(2P3/2) and I*(2P1/2) that is well reproduced by the calculations. However, the observed reduction in delay time between the I and I* channels when the C H3 fragment appears with one or two quanta of vibrational excitation in the umbrella mode is not well accounted for by the theoretical model. © 2008 American Institute of Physics.This work has been financed by the Spanish MEC through Grant Nos. CTQ2005-08493-C02-01, FIS-2007- 62002, and Consolider program “Science and Applications of Ultrafast Ultraintense Lasers” No. CSD2007-00013.Peer Reviewe

Organización Docente de la Asignatura Ingeniería de los Sistemas Basados en el Conocimiento

En este trabajo se presentan los objetivos, los contenidos y los métodos de enseñanza de la asignatura de Ingeniería de los Sistemas Basados en el Conocimiento (ISBC). La asignatura es una optativa que complementa las asignaturas troncales de Inteligencia Artificial e Ingeniería del Conocimiento. En la asignatura se hace especial hincapié en los temas de representación del conocimiento y en el empleo de entornos que integran distintos lenguajes de representación. El enfoque de la asignatura es eminentemente práctico, planteándose las clases teóricas alrededor de ejemplos de diseño e implementación para la presentación de los conceptos. En cuanto a los trabajos de la asignatura, además de las prácticas, se ha dado opción a la participación en proyectos en los que se ven las aplicaciones de la ISBC como un valor añadido

Aspectos docentes de la asignatura de “Inteligencia Artificial e Ingeniería del Conocimiento 1” del plan de estudios de Ingeniería Informática de la Universidad de Zaragoza

En este trabajo se presentan los aspectos docentes de la asignatura de Inteligencia Artificial e Ingeniería del Conocimiento 1. Es una asignatura restringida a la parte de introducción, búsqueda y representación del conocimiento y con un especial hincapié en la programación, generalmente con Common Lisp