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Pagotto J.,Center for Security Science | O'Donnell D.,Continuum Inc.
ISCRAM 2012 Conference Proceedings - 9th International Conference on Information Systems for Crisis Response and Management | Year: 2012

The Canadian Multi-Agency Situational Awareness System (MASAS) is rapidly becoming Canada's national system for exchanging emergency management incident-relevant information amongst multiple agencies and jurisdictions. Through the use of structured information aligned with open standards, and a centrally managed open architecture, MASAS provides a trusted virtual community with the ability to seamlessly exchange emergency management information. MASAS offers an information exchange architecture that is based around a highly resilient system of data aggregation hubs that are easily accessible directly or through third party commercial tools by emergency management officials at all levels, from the smallest community in the most remote areas of Canada's north to key federal stakeholders such as the federal Government Operations Centre or the Canadian military. This paper highlights the key design principles, experimental activities, and technology implementation strategies that are positioning MASAS as a Canadian success story in the making - from coast to coast to coast. © 2012 ISCRAM.

Trumpour A.,Ryerson University | Greatrix D.,Ryerson University | Karpynczyk J.,Ryerson University | Cherrington W.,Continuum Inc.
Canadian Aeronautics and Space Journal | Year: 2010

This paper gives an overview of the preliminary design of a small hybrid rocket engine (HRE) that is being built in support of propulsion research activities at Ryerson University. The initial design work was undertaken primarily with a paraffin and gaseous oxygen (GOx) propellant combination in mind, but the system is readily adaptable to other propellant combinations for future investigations. When a reusable, non-eroding nozzle is necessary for accurate engine performance measurements, a water-cooled copper design is to be employed. This approach offers the added benefit of allowing the cooling water temperature rise to be measured, and thus the amount of heat being handled by the nozzle can be quantified. The preliminary nozzle design is supported by a steady-state computational fluid dynamics (CFD) analysis of the nozzle flows and associated heat fluxes. The overall engine design is further evaluated by examination of internal ballistic simulation results with respect to such factors as expected performance (chamber pressure, thrust, specific impulse, and total impulse) for a given oxidizer mass flow rate and nozzle throat size. © 2010 CASI.

Brahmbhatt V.,FH Aachen | Greatrix D.R.,Ryerson University | Karpynczyk J.,Ryerson University | Trumpour A.P.,Continuum Inc.
International Journal of Energetic Materials and Chemical Propulsion | Year: 2014

An investigation of the performance of Ryerson University's prototype laboratory-scale hybrid rocket engine is undertaken in the present study. The evaluation is primarily based on two experimental firings of this engine-one employing low-density polyethylene as the solid fuel and the other employing paraffin wax. Gaseous oxygen is the oxidizer in both cases. The principal test data collected are the firing's head-end pressure/time and thrust/time profiles. A cutaway view of the respective fuel grain at the end of the firing is also an important piece of experimental information. A quasi-steady internal ballistic simulation program is used to compare the predicted numerical results with the experimental test data in order to develop a better understanding of the engine's performance behavior. Factors such as fuel surface roughness, fuel decomposition temperature under non-combustive ablation (when beyond the nominal stoichiometric length limit), and burning fuel surface temperature are among the performance elements of interest that are incorporated into the simulation model and evaluated for their respective influence on the engine's performance. To some degree, the comparisons between the experimental and numerically predicted results indicate some qualitative agreement but less so in other respects. The main differences can likely be attributed to the following undesirable experimental factors: a non-constant, subsonic oxidizer delivery; an overly intense and prolonged ignition process (using steel wool positioned at the head end); and in the case of the paraffin engine firing, an inordinate propensity for the soft paraffin wax to be ejected uncombusted from the combustion chamber. © 2014 by Begell House, Inc.

Murthy T.V.,Thermo Fisher Scientific | Kroncke D.,Continuum Inc. | Bonin P.D.,Pfizer
Journal of Laboratory Automation | Year: 2011

Miniaturizing experimental sample volumes to the nanoliter volume range is one of the most economical ways to perform mid- and high-throughput compound screening experiments. Existing automation platforms for nanoliter fluid handling can be bulky, expensive, and require periodic calibration to provide consistent liquid dispensing. In addition, even with frequent calibration, significant instrument-to-instrument variation in low-volume dispensing can occur between different instrument platforms. Many of these issues can be addressed by the use of PocketTips. PocketTips are tips with a defined internal pocket designed to hold specific nanoliter volumes of compound dissolved in dimethylsulfoxide. Although the overall liquid-handling process with PocketTips uses the aspirate/dispense features of the specific liquid-handling device being used, the dispensed nanoliter volume is solely based on the dimensions of the pocket of the PocketTip and thus, the liquid-handling device itself need not have nanoliter dispensing capabilities. In this report, we demonstrate the performance of PocketTips on different automation platforms. In addition, we used a cell-based ß-lactamase reporter assay system to demonstrate that compound delivery by PocketTips compares favorably with a standard compound addition technique. © 2011 Society for Laboratory Automation and Screening.

A method for determining a value indicator in a broker-mediated geospatial information service environment includes receiving feedback data at a first system of the broker-mediated geospatial information service environment. In particular, the feedback data is received from a plurality of respondents, and relates to a broker-mediated geospatial information service provided to each respondent of the plurality of respondents. Furthermore, each respondent of the plurality of respondents is a prior requestor of a process-dataset solution for performing the broker-mediated geospatial information service. Based on the feedback data, a value indicator relating to the process-dataset solution is determined.

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