Uso de herramientas de simulación en el dominio del tiempo para el diseño de vehículos sumergibles operados remotamente

Designing a Remotely Operated Vehicle (ROV) is a complicated task in which the design team deals with a considerable amount of uncertainty before the device is able to be tested at full scale. A way to cope with such uncertainty is to use simulation software to evaluate design concepts along the different levels of abstraction of the process. In this work, the use of aNySIM, the Maritime Research Institute Netherlands (MARIN) multibody time-domain simulation tool, as a part of the design process of an ROV is addressed. The simulation software is able to solve the equations of motion of the vehicle based on rigid body dynamics, including features such as hydrodynamics, hydrostatics, thrusters, thrust allocation, and PID control. Different simulation scenarios are proposed to evaluate different concept solutions to the design, including thruster parameters and distribution. The results are further used to select the concept solutions to be implemented in the final design.El diseño de vehículos operados remotamente (ROV) es una tarea complicada en la cual el equipo de diseño trabaja con una cantidad importante de incertidumbres antes de que el dispositivo pueda ser probado a escala real. Una forma de reducir esta incertidumbre es usar software de simulación para evaluar conceptos de diseño a lo largo de los diferentes niveles de abstracción del proceso. En este trabajo se usa aNySIM dentro del proceso de diseño del ROV; esta es una herramienta de simulación multicuerpo en el dominio del tiempo desarrollada por el Maritime Research Institute Netherlands (MARIN). El software de simulación es capaz de resolver las ecuaciones de movimiento del vehículo con base en la dinámica del cuerpo rígido, incluyendo elementos de hidrodinámica, hidrostática, propulsores, distribución de fuerza de propulsión y control PID. Se proponen diferentes escenarios para evaluar diferentes conceptos en las soluciones de diseño, tales como los parámetros y distribución de los propulsores. Estos resultados son usados luego para para seleccionar las soluciones que son implementadas en el diseño final

Performance Evaluation of Low-Cost BTEX Sensors and Devices within the EURAMET Key-VOCs Project

The KEY-VOCs project is a EURAMET joint research project focused on key Volatile Organic Compounds (VOCs) in air. One of its activities is the evaluation of sensors-based measurement systems. In Europe, the monitoring of benzene in ambient air is mandatory as set by the European Directive for air quality (AQD) [1]. This Directive states that the reference method of measurement shall consist of active or on-line sampling followed by gas chromatography [2]. These methods are time consuming, expensive to implement and not easily portable prohibiting more local estimation of the population exposure. However, the AQD allows using indicative measurements with higher uncertainty than those of the reference methods. Sensor systems are good candidates for indicative methods with the additional ability of near-to real-time measurements

Review of Portable and Low-Cost Sensors for the Ambient Air Monitoring of Benzene and Other Volatile Organic Compounds

This article presents a literature review of sensors for the monitoring of benzene in ambient air and other volatile organic compounds. Combined with information provided by stakeholders, manufacturers and literature, the review considers commercially available sensors, including PID-based sensors, semiconductor (resistive gas sensors) and portable on-line measuring devices as for example sensor arrays. The bibliographic collection includes the following topics: sensor description, field of application at fixed sites, indoor and ambient air monitoring, range of concentration levels and limit of detection in air, model descriptions of the phenomena involved in the sensor detection process, gaseous interference selectivity of sensors in complex VOC matrix, validation data in lab experiments and under field conditions

De Dietse vertaling der 'scala sacre communionis van ioannes maubernus

Toen ik mij destijds, bij het zoeken naar een dissertatie onderwerp uit de middeleeuwse mystiek, tot Prof. Dr. Titus Brandsma O. Carm. te Nijmegen wendde. om zijn advies hierin te horen, schoof hij me, in de ontvangkamer van Huize 'Carmell, Doddendaal 8, de catalogus IIFoto's van Middelnederlandsche geestelijke handschriftenM-b ewerkt door zijn assistente, Mej. G. Feugen - toe, waaruit ik een keuze voor een tekstuitgave kon doen. Weldra had ik enkele titels gevonden die me aantrokken, maar tot mijn spijt moest Prof. Brandsma ze mij op goede gronden afraden. Het uiteindelijke resultaat der besprekingen was een onderwerp dat hem blijkbaar na aan het hart lag, maar mij enigszins tegenstond: de uitgave van een anoniem traktaat dat op pag. 56 van genoemde catalogus vermeld wordt sub Warendorf 'en waarvan Mej. Feugen reeds een afschrift had gemaakt (dat ze mij welwillend heeft afgestaan, evenals later haar kopie van hs. M). ... Zie: Voorwoor