437,929 research outputs found

    Engineering Geology for Society and Territory - Volume 7: Education, Professional Ethics and Public Recognition of Engineering Geology

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    This book is one out of 8 IAEG XII Congress volumes, and deals with education and the professional ethics, which scientists, regulators, and practitioners of engineering geology inevitably have to face through the purposes, methods, limitations, and findings of their works. This volume presents contributions on the professional responsibilities of engineering geologists; the interaction of engineering geologists with other professionals; recognition of the engineering geological profession and its particular contribution to society, culture, and economy; and implications for the education of engineering geologists at tertiary level and in further education schemes. Issues treated in this volume are: the position of engineering geology within the geo-engineering profession; professional ethics and communication; resource use and re-use; managing risk in a litigious world; engineering and geological responsibility; and engineering geology at tertiary level. The Engineering Geology for Society and Territory volumes of the IAEG XII Congress held in Torino from September 15-19, 2014, analyze the dynamic role of engineering geology in our changing world and build on the four main themes of the congress: Environment, processes, issues, and approaches

    A simple method for capturing some complex physics of gas flows in MEMS

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    An invited talk on a simple method for capturing some complex physics of gas flows in MEMS presented at 8th World Congress on Computational Mechanics (WCCM8) / 5th European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS 2008) (Venice, Italy)

    An ordered framework for partial multivalued functors

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    The category Rel of sets and relations intimately ties the notions of function, partial multivalued function, and direct image under a function through the description of Rel as the Kleisli category of the covariant power set functor on Set. We present a suitable framework to obtain a similar relationship between the concepts of functor, partial multivalued functor, and the direct image under a functor.Comment: Accepted for presentation at the Asia-Pacific World Congress on Computer Science and Engineering 2015, Fij

    Spectrum of topics for world congresses and other activities of the International Society for Physical and Rehabilitation Medicine (ISPRM) : a first proposal

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    Background: One of the objectives of the International Society for Physical and Rehabilitation Medicine is to improve the continuity of World Congresses. This requires the development of an abstract topic list for use in congress announcements and abstract submissions. Methods: An abstract topic list was developed on the basis of the definitions of human functioning and rehabilitation research, which define 5 main areas of research (biosciences in rehabilitation, biomedical rehabilitation sciences and engineering, clinical Physical and Rehabilitation Medicine (PRM) sciences, integrative rehabilitation sciences, and human functioning sciences). For the abstract topic list, these research areas were grouped according to the proposals of congress streams. In a second step, the first version of the list was systematically compared with the topics of the 2003 ISPRM World Congress. Results: The resulting comprehensive abstract topic list contains 5 chapters according to the definition of human functioning and rehabilitation research. Due to the high significance of clinical research, clinical PRM sciences were placed at the top of the list, comprising all relevant health conditions treated in PRM services. For congress announcements a short topic list was derived. Discussion: The ISPRM topic list is sustainable and covers a full range of topics. It may be useful for congresses and elsewhere in structuring research in PRM

    Surface curvature effects on performance of a laboratory scale tidal turbine

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    This paper presents numerical study of the surface curvature effects on the performance of a 3D lab scale tidal turbine (E387) using Eppler 387 airfoil. The prescribed surface curvature distribution blade design method is used to remove the surface curvature discontinuity of E387 turbine and the redesigned turbine is denoted as A7 turbine. The two turbines are analysed using in-house BEM code and CFD RANS. The performance of E3787 turbine obtained from BEM and RANS match well with the experimental results from reported literature. The A7 turbine has mildly better performance at low tip speed ratio (1-4.25) at which the blade is partly or fully stalled

    Growth and Self-Ejection of Single Condensate Droplet on Nanostructured Microcones

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    In the last decade, the phenomenon of coalescence-induced droplet jumping has been studied in depth because of the advantages it brings in applications such as anti-frosting, anti-icing, condensation heat transfer, water harvesting, thermal diodes for electronics cooling and self-cleaning [1]. In this work we theoretically and experimentally show that surfaces structured with micro truncated cones covered with highly hydrophobic nanostructures exhibit a recurrent self-ejection of single condensate droplets in addition to the common coalescence-induced jumps. We analytically modelled the external forces acting both on a droplet of condensate slowly growing in conical pores (a simplification of the growth between truncated cones) and during the following rapid transient for two possible cases of self-ejection: 1) rapid swelling out of the structures and 2) detachment from a pinning site (a less hydrophobic defect or the nucleation site). Viscous and adhesion dissipations were included in the modelling. We described the shape of the growing droplet as a function of the tapering (B) and of dynamic contact angles (vadv and vrec ). For both cases, the minimum requirement for self-ejection is that the receding angle of the walls (vrec ) and any pinning site (vpinningrec ) are greater than 90°+B. In the first case, as the volume increases, the upper meniscus moves towards the apex of the cones and the lower one follows it as soon as it reaches vrec; when the droplet reaches the apex of the structures it self-ejects because the superior meniscus expands rapidly and a Laplace pressure gradient is generated between the menisci. In the second case, the superior meniscus grows towards the apex and when the lower one recedes from the pinning site, the droplet self-ejects due to the Laplace pressure gradient generated by the abrupt change in wettability, as recently reported for relatively large droplets (radius > 50 ÎŒm) in diverging grooves [2]. Describing growth and self-ejection with a system of forces requires a careful distinction between external and internal forces. The modelling with forces, unlike the energetic one [2], allowed us to describe the ejection transient dynamics and to derive the ejection velocity while maintaining the dependence on the dynamic contact angles of the superhydrophobic walls and of an eventual pinning site, fundamental quantities for the design of real surfaces. The analytical results relative to the case of the pinning site foresee that, at a fixed contact angle hysteresis of the superhydrophobic walls and vpinningrec, the ejection velocity increases with B (until the limit B = vpinningrec − 90°, beyond which there cannot be ejection); in addition, the velocity is greater as the droplet size decreases if viscous dissipations are not considered while a peak trend is observed with the dissipations included. We fabricated silicon truncated micro cones arranged in square and hexagonal patterns and covered with nanostructures. Through condensation experiments in a controlled environmental chamber we observed for the first time the self-ejection of the drops that nucleate and grow between the cones (in the case in question the droplet diameter ≈ 11 um). By fabricating cones of different sizes, we have also studied the self-ejection rate per unit area as a function of the droplet size. Furthermore, we performed preliminary condensation frosting experiments. Future investigations of this new class of jumping droplet surfaces may show important advantages in the mentioned applications

    Editorial of the special issue on advanced electrochemical technologies for environmental applications

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    This special issue of Separation and Purification Technology gathers 27 articles, which are related to keynotes and oral or poster presentations at the 2nd European Workshop of Electrochemical Engineering entitled ‘New Bridges for a New Knowledge on Electrochemical Engineering’. The workshop was held from 1st to 5th October 2017 in Barcelona (Spain), as a Joint Event of the 10th World Congress of Chemical Engineering (WCCE10). This congress was promoted by the World Chemical Engineering Council (WCEC), the European Federation of Chemical Engineering (EFCE) and the European Society of Biochemical Engineering Sciences (ESBES) to approach researchers and specialists in all areas of chemical engineering and to improve their strategy for the development of innovative processes that will be vital for the society of tomorrow. The joint event was promoted by the Working Party on Electrochemical Engineering (WPEE) of the EFCE and co-organized with the Spanish Excellence Network on Environmental and Energy Applications of the Electrochemical Technology (thus being the 2nd Workshop of E3TECH Network). It took place at Fira de Barcelona, one of the most important trade fair institutions in Europe
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