Neisse R.,Fraunhofer Institute for Experimental Software Engineering |
Pretschner A.,Karlsruhe Institute of Technology |
Di Giacomo V.,Engineering
Proceedings of the 2011 6th International Conference on Availability, Reliability and Security, ARES 2011 | Year: 2011
Usage control policies specify restrictions on the handling of data after access has been granted. We present the design and implementation of a framework for enforcing usage control requirements and demonstrate its genericity by instantiating it to two different levels of abstraction, thoseof the operating system and an enterprise service bus. This framework consists of a policy language, an automatic conversion of policies into enforcement mechanisms, and technology implemented on the grounds of trusted computing technology that makes it possible to detect tampering with the infrastructure. We show how this framework can, among other things, be used to enforce separation-of-duty policies. We provide a performance analysis. © 2011 IEEE.
Agency: Cordis | Branch: FP7 | Program: JTI-CP-FCH | Phase: SP1-JTI-FCH.2011.2.3 | Award Amount: 3.44M | Year: 2012
Through development and scale up activities on materials and reactors for the integration of advanced biomass steam gasification and syngas purification processes, UNIfHY aims to obtain continuous pure hydrogen production from biomass, increase well-to-tank efficiency and contribute to a sustainable energy portfolio, exploiting results achieved in past R&D EU projects on hot gas catalytic conditioning. The project is based on the utilization of plant components of proven performance and reliability and well established processes (UNIQUE coupled gasification and gas conditioning technology, Water-Gas Shift, WGS, system and Pressure Swing Adsorption, PSA, system), thus targeting up to 20 years plant durability with availability>95%. The project benefits from the already existing laboratories and UNIQUE gasifiers in order to maximize results (technology development at process-, system- and industrial-scale) with minimum risk and budget requirement (laboratories, pilot and industrial gasifier already available). New materials for atmospheric pressure WGS are realized and utilized to develop reactors, integrated with a tailored PSA in a portable purification unit, connected downstream small-to-medium scale (up to 1 MWth) UNIQUE gasifiers in order to yield pure hydrogen. The result will be two UNIfHY prototype units for continuous production of hydrogen (up to 500 kg/day). Thanks to the high level of thermal integration and to the reuse of purge gas in the process, conversion efficiency in hydrogen higher than 70% is expected. Finally, the gas conditioning system cost becomes 30% as that of a standard free-standing conditioning system, due to remarkable plant integration: reforming of both tar and methane and particulates abatement is carried out directly in the freeboard of the biomass gasifier, providing investment cost savings greater than 50%, a simplified plant layout with reduction of space and components up to 50% and a hydrogen production cost not exceeding 4/kg.
Teymouri M.,Institute of Iran Industrial Research |
Procedia Computer Science | Year: 2011
In many organizations, information system and IT infrastructure have been considered as the most strategic capital and valid information is an important factor leads to business success. In this paper we investigate IT effects on project risk management which is vital in any industrial and business activities as a continuous and forecasting process. Risk management involves identifying the potential risks, measuring, monitoring and controlling them in an organization to meet its strategies and objectives and causes to decrease the undesired effects in project life cycles. It also has a main rule in strategic management of the organization by controlling the threads. In this paper we have estimated the effects of IT usage on 50 Iranian oil companies by analyzing the data which have been provided by questionnaires. Three different indices-cost, time, and performance-have been utilized to evaluate information technology impact on risk management. Our results illustrate the positive impact of information technology on risk management especially in optimizing time of process rather than cost and performance. © 2010 Published by Elsevier Ltd.
Agenant M.,University Utrecht |
Noordmans H.-J.,University Utrecht |
Koomen W.,Engineering |
Bosch J.L.H.R.,University Utrecht
PLoS ONE | Year: 2013
Background: Bladder cancer is the fourth most common malignancy in men, with a recurrence rate of 33-64%. Tumor documentation during cystoscopy of the bladder is suboptimal and might play a role in these high recurrence rates. Objective: In this project, a bladder registration and navigation system was developed to improve bladder tumor documentation and consequently increase reproducibility of the cystoscopy. Materials/Methods: The bladder registration and navigation system consists of a stereo-tracker that tracks the location of a newly developed target, which is attached to the endoscope during cystoscopy. With this information the urology registration and navigation software is able to register the 3D position of a lesion of interest. Simultaneously, the endoscopic image is captured in order to combine it with this 3D position. To enable navigation, navigational cues are displayed on the monitor, which subsequently direct the cystoscopist to the previously registered lesion. To test the system, a rigid and a flexible bladder phantom was developed. The system's robustness was tested by measuring the accuracy of registering and navigating the lesions. Different calibration procedures were compared. It was also tested whether system accuracy is limited by using a previously saved calibration, to avoid surgical delay due to calibration. Urological application was tested by comparing a rotational camera (fixed to the rotating endoscope) to a non-rotational camera (dangling by gravity) used in standard urologic practice. Finally, the influence of volume differences on registering and navigating was tested. Results/Conclusion: The bladder registration and navigation system has an acceptable accuracy for bladder lesion registration and navigation. Limitations for patient determinants included changes in bladder volume and bladder deformation. In vivo studies are required to measure the effect of these limitations and functionality in urological practice as a tool to increase reproducibility of the cystoscopy. © 2013 Agenant et al.
Nardone G.,Engineering |
Sisto R.,University of Foggia |
Journal of Rural Studies | Year: 2010
This paper focuses on the introduction of a suitable method for the measurement of social capital in the context of rural development policies. We present an empirical application of the method to four case studies from the south of Italy. In order to overcome some limits affecting previous empirical research, we have grounded the measurement framework upon a clear decomposition of the concept of social capital characterizing three main dimensions: structural, relational and cognitive. This has allowed us to build five direct indicators for the core components of social capital created within the EU local agencies for rural development (the Local Action Groups). Moreover we have set a synthetic measure capturing the specific configuration of the internal social capital of the groups as a whole. © 2009 Elsevier Ltd. All rights reserved.
Recommended practices for the development of an effective steam surface condenser maintenance regime; including suggested maintenance solutions & design modifications that can improve condenser performance and reliability
International Conference on Nuclear Engineering, Proceedings, ICONE | Year: 2012
A detailed & proper understanding of the main components that comprise a Steam Surface Condenser is absolutely essential when designing an effective maintenance regime. This Paper provides a breakdown for each of the main components, including typical ancillary items, which should be incorporated into visual inspections, and routine testing, when developing an effective maintenance regime for Steam Surface Condensers. Topics cover recommended inspection criteria for the main and ancillary components as well as proposed testing methods. Examples of known component failure modes, suggested repairs, replacements, modifications & upgrades are also included for reference. Implementation of an effective maintenance regime can help to ensure design performance is maintained. Often, it can even lead to improvements in unit availability and overall long term reliability; which in turn can result in tangible reductions in operating costs. Copyright © 2012 by ASME.
Civil-Comp Proceedings | Year: 2014
This study, described in this paper, was motivated by the experience gained while researching tracing the FICO was prepared. It is observed that the practice of tracing optimization is not widely applied when the project definition phase is in this guideline station. Motivated by the results achieved by the project team, it was sought to disclose the effects of the adoption of this new concept in the study of the railway line, favoring broader radius and more rectilinear guidelines, which offered satisfactory results with respect to average speed and decreased wastage in rails. In tracing the FICO - Integration Railway Midwest, it was possible to make a reasonable improvement in operational performance and the executive railway, generated by the shortening of 19 km and saving 10 million cubic meters of earthworks. A total of 147 radiuses shorter than 528.916 m were removed, increasing the speed of the composition from a minimum speed of 43 km / h to 53 km / h, which represents a 23% increase in speed curves. According to VALEC, the average cost of deploying a railway is 5 million reais per kilometer, thus optimizing the layout of the FICO resulted in savings of 95 million reais (47.5 million dollars). This may mean indirectly that a project committed to policies more focused on performance will be more economic by saving on maintenance and increase railway life. This allowed us to analyze the influence of radius and ramps on transport capacity and measure the wastage in rails and understand the difficulties involved in the railway operation. There are sufficient data to support the efficacy of the geometry on the viability of the project. There is a necessity for specialized professionals in railway projects and legislation enforcement aimed at improving and expanding the rail system making it more functional and efficient. We need to deepen the practical experiences related here based on research carried out in our country, in order to reflect its climate, topographical and geotechnical reality. © Civil-Comp Press, 2014.
Review of Scientific Instruments | Year: 2011
Libbrecht and Libbrecht recently described a thermoelectric temperature controller for which they claimed an absolute accuracy of 100 mK. They did not specify the heat-dissipation coefficient for their thermistor temperature sensor-which would dissipate more power than is usual in such circuits- nor make any allowance for self-heating in the thermistor. Self-heating can be expected to have introduced more than 100 mK of absolute error in their circuit. © 2011 American Institute of Physics.
Nadimpalli S.P.V.,Engineering |
ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE) | Year: 2015
An in situ study of stress evolution of germanium as a lithiumion battery electrode material is presented. Thin films of germanium are cycled in a half-cell configuration with lithium metal foil as counter/reference electrode, with 1M lithium hexafluorophosphate in ethylene carbonate, diethylene carbonate, dimethyl carbonate solution (1:1:1, wt. %) as electrolyte. Real-Time stress evolution in the germanium thinfilm electrodes during electrochemical lithiation and delithiation is measured by monitoring the substrate curvature using the multi-beam optical sensing method. Germanium thin film undergoes extensive inelastic deformation during electrochemical lithiation and delithiation similar to silicon. The peak compressive stress during lithiation in germanium was 0.6 GPa, which is almost half of the peak compressive stress of lithiated silicon. The tensile stress of lithiated Ge on the other hand was almost same as that of lithiated silicon, 1 GPa of peak stress. The stress response of the first cycle was slightly different from that of the second cycle, which is an indication of irreversible structural changes in the Ge electrode during the first cycle. The Ge thin films survived stresses as high as 1 GPa of tensile stress without developing any cracks while the Si films under same conditions showed extensive cracking, consistent with previous observations which claimed lithiated Ge to be tougher than lithiated Si. Copyright © 2015 by ASME.
Engineering | Date: 2011-07-18
The present disclosure provides an apparatus for sensing a motion. The apparatus comprises an optical fibre portion comprising a Bragg grating and an element for reducing an impact of an external force that is transversal to the Bragg grating. Further, the apparatus comprises a contact region arranged so that movement of a further region, that is in direct or indirect contact with the contact region and moves in a direction along a portion of the apparatus, causes movement of the optical fibre portion at the contact region. The apparatus also comprises a holder arranged for reducing movement of the optical fibre portion at a holding region when the optical fibre portion is moved at the contact surface. The apparatus is arranged so that movement of the contact region relative to the holding region causes a change in strain of the Bragg grating.