Implementation of a simplified method for actuation of ferrofluids

This paper was presented at the 3rd Micro and Nano Flows Conference (MNF2011), which was held at the Makedonia Palace Hotel, Thessaloniki in Greece. The conference was organised by Brunel University and supported by the Italian Union of Thermofluiddynamics, Aristotle University of Thessaloniki, University of Thessaly, IPEM, the Process Intensification Network, the Institution of Mechanical Engineers, the Heat Transfer Society, HEXAG - the Heat Exchange Action Group, and the Energy Institute.Magnetic actuation of ferrofluids is an emergent field that will open up new possibilities in various fields of engineering. The quality and topology of the magnetic field that is being utilized in such systems is determinant in terms of flow properties, flow rates and overall efficiency. Determining the optimal magnetic field topology to achieve the desired results, and determining the methods by which these magnetic fields are to be generated are central problems of obtaining the desired flow. A healthy comparison of various magnetic field topologies requires a varied set of examples from the most simplified to most sophisticated. Such comparisons are necessary to have a well grounded starting point. This study focuses on a particular pump design that employs a simplified magnetic field topology to obtain ferrofluid flow. The results of this paper such as flow and pressure difference are intended to form a baseline for future reference.Sabancı University Internal Research Grant, no: IACF09-0064

SALUD: A spatial microsimulation application to support regional health planning in Austria

The Austrian Federal Ministry of Health aims to improve the health of all people living in Austria and to decrease health and social inequalities. This leads to a careful planning and distribution of the available health care resources to meet government aims. The research project SALUD, funded by the Federal Ministry for Transport, Innovation and Technology and the Austrian Science Fund, focuses on building a Spatial Microsimulation Model for Austria by combining survey and census data to model small area health issues based on individuals or households where no data exists, so called missing data. Within this project, a first prototype of simSALUD is developed, which is a Web-based spatial microsimulation application for health decision support as to date no flexible and free-available Web application in the area of spatial microsimulation exists. simSALUD targets two groups: experts in the area and health policy decision makers (HPDM). The present work focuses on the latter group and will highlight the benefits of simSALUD for HPDM, as they are mainly interested in the results and not primarily in the underlying modelling process. The first prototype of simSALUD is a Web-based application that can be used either offline or online and is therefore accessible anywhere and anytime. Functionally it consists of three modules called (i) data loader, (ii) visualisation area, and (iii) geoprocessing tools. - The data loader supports the management of different datasets (loading, overlaying, sorting, etc.). The main benefit here is that HPDM may access a shared pool of open simulated data that is otherwise hardly available. - The visualisation area presents an interactive map with different standard functionalities, including zoom and pan. This is especially valuable for HPDM as hotspots and problem areas on maps can often be identified more easily than lots of numbers in a list. - The geoprocessing tools, such as ?create buffer? or ?location optimization? allow doing spatial analysis on data to answer what-if scenarios. In general, the main advantage of simSALUD is that HPDM can use the application and perform various spatial analyses without needing specialist skills in spatial microsimulation modelling or geoinformation science. The first prototype of SimSALUD will be introduced to our project partners in their health departments in order to evaluate its practical usefulness and relevance in the area of regional health planning. This work will discuss the results of the evaluation, highlighting the pros and cons of the prototype as well as defining the road map for futures developments of simSALUD. Hence, with simSALUD we hope to make a positive contribution for the area of spatial microsimulation modelling, as it is the first open accessible Web application so far

Water Splitting Photovoltaic-Photoelectrochemical GaAs/InGaAsP - WO3/BiVO4 Tandem Cell with Extremely Thin Absorber Photoanode Structure

We demonstrate highly efficient solar hydrogen generation via water splitting by photovoltaicphotoelectrochemical (PV-PEC) tandem device based on GaAs/InGaAsP (PV cell) and WO3/BiVO4 core/shell nanorods (PEC cell). We utilized extremely thin absorber (ETA) concept to design the WO3/BiVO4 core/shell heterojunction nanorods and obtained the highest efficiencies of photo-induced charge carriers generation, separation and transfer that are possible for the WO3/BiVO4 material combination. The PV-PEC tandem shows stable water splitting photocurrent of 6.56 mA cm-2 under standard AM1.5G solar light that corresponds to the record solar-to-hydrogen (STH) conversion efficiency of 8.1%

Domain Specific Languages for Managing Feature Models: Advances and Challenges

International audienceManaging multiple and complex feature models is a tedious and error-prone activity in software product line engineering. Despite many advances in formal methods and analysis techniques, the supporting tools and APIs are not easily usable together, nor unified. In this paper, we report on the development and evolution of the Familiar Domain-Specific Language (DSL). Its toolset is dedicated to the large scale management of feature models through a good support for separating concerns, composing feature models and scripting manipulations. We overview various applications of Familiar and discuss both advantages and identified drawbacks. We then devise salient challenges to improve such DSL support in the near future