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Wayne, PA, United States

Meyer E.J.,Core Solutions | Meyer E.J.,University of Pretoria | Craig I.K.,University of Pretoria
Minerals Engineering | Year: 2010

Often the most difficult step in establishing a control system is the development of a suitable dynamic process model. As such a model is not available elsewhere, a first principle dynamic mathematical model was developed for a coal dense medium separation circuit. Each unit operation was modelled individually and then integrated together to form a complete non-linear state-space model for the circuit. This model was used to simulate the process and it was validated using real process data derived from a plant experiment. When developing models from first principles, it is necessary to estimate the model parameters. These parameters, specifically for non-linear state-space relationships, require a unique solution. A parameter identifiability method was used to show that the non-linear dynamic models developed have unique parameters for a specific set of input-output data. © 2010 Elsevier Ltd. All rights reserved. Source

Lowenkamp M.S.,Core Solutions | Lowenkamp C.T.,Administrative Office of U.S. Courts | Lowenkamp M.N.,Ohio State University
Federal Probation | Year: 2015

Regina, a client in a specialty program, struggled early, but turned it around late and finished the program with a fresh perspective and new outlook. Early in the client's transition, the court rewarded positive behaviors with candy bars. One day, she explained to me, her supervising officer, that she didn't need or want the candy. She explained that the candy isn't and wasn't a reason to show up for, and participate in, group activities. Regina, now several months clean, shared that she typically gave the candy to another participant who was much more interested in chocolate. If not the chocolate, then why did she show up, try new things, and eventually learn a new way of responding to situations that would have normally led her to use drugs? Maybe it was the public praise that accompanied the chocolate. Perhaps it was the improved family relationships that grew with each passing day of sobriety. If we're guessing, it might have been any number of things that might come to mind. There is one way to find out for sure why she continued to replicate a behavior that led to lasting change-just ask! Imagine the impact we could've had and the timing of the impact if we'd just asked Regina what motivates her to do things differently. Source

The issue of the required LNG storage facilities at the terminals is mainly dependent on the weather conditions which may restrict the vessel's approach to the loading terminal and on the sea and ice conditions along the shipping route. Storms and heavy ice condition may result in considerable delays in the planned voyage schedules. Some of the weather delays can be compensated by the sea margin, when the ship sails faster in order to catch up with the schedule. This scientific paper discusses the issues related to transshipment and loading of LNG at the terminals exposed to severe weather conditions. Source

Gordon J.B.,Core Solutions | Pemberton S.G.,University of Alberta | Gingras M.K.,University of Alberta | Konhauser K.O.,University of Alberta
AAPG Bulletin | Year: 2010

A detailed petrographic analysis was conducted on several core samples from the Cretaceous-aged Bluesky Formation in the La Glace area in Alberta, Canada. Within the gas-producing zone of these upper shoreface sediments, a fine- to mid-medium-grained chert-rich litharenite is intensely bioturbated with Macaronichnus segregatus. Petrographic analysis showed that the burrow mantle is generally lined with dark-colored, ironrich (mainly chert, shale clasts, and organic grains) fragments, whereas the burrow fill contained mainly quartz and lightcolored chert fragments. The reason for the dark-colored grain segregation of the tracemaker is unclear, but in the Bluesky Formation presented in this study, grain segregation has improved the reservoir quality by effectively resorting compaction- and cement-resistant chert and quartz into the burrow fill. Primary reservoir quality can be preserved in the presence of chert as pore-occluding quartz overgrowths do not form on chert fragments as they do on monocrystalline quartz, thus leaving open, well-connected primary pores and hence elevated permeability. Chert fragments are resistant to the effects of mechanical compaction and are not easily squeezed into adjacent pore spaces as are ductile rock fragments. Further research is needed to test the chemical constituents of the grains that modern tracemakers ingest. This may lead to a better understanding of why sands burrowed with Macaronichnus and similar burrowed sediment can have elevated reservoir quality. Copyright ©2010. The American Association of Petroleum Geologists. All rights reserved. Source

Ferguson N.,Core Solutions
Computer | Year: 2011

Industry needs bright, talented, well-prepared graduates to join the workforce, while academia requires insight into industry's needs to ensure that it can develop a future workforce that is prepared to meet those needs. © 2011 IEEE. Source

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