15,911 research outputs found

    The identification of continuous, spatiotemporal systems

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    We present a method for the identification of continuous, spatiotemporal dynamics from experimental data. We use a model in the form of a partial differential equation and formulate an optimization problem for its estimation from data. The solution is found as a multivariate nonlinear regression problem using the ACE-algorithm. The procedure is successfully applied to data, obtained by simulation of the Swift-Hohenberg equation. There are no restrictions on the dimensionality of the investigated system, allowing for the analysis of high-dimensional chaotic as well as transient dynamics. The demands on the experimental data are discussed as well as the sensitivity of the method towards noise

    SLO\u27s and School Counseling: A Perfect Fit

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    Dr. Brandie Oliver and Dr. Nick Abel address student learning outcomes for school counselors in the March 2015 issue of IndianaGram

    Hints For Hiring School Counselors: How Can School Counselors Have A Positive Effect On Student Outcomes?

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    Dr. Oliver and Dr. Abel take a look at the role of school counselors and the positive impact they can have on student outcomes

    Hints For Hiring School Counselors: Using Your New School Counselor Effectively

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    In this column, Dr. Oliver and Dr. Abel provide helpful hints and recommendations on school counseling

    Hints For Hiring School Counselors: What does it mean when an applicant graduates from a CACREP accredited program?

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    Dr. Oliver and Dr. Abel explore what it means when an applicant graduates from a CACREP accredited school counseling program

    Front speed enhancement in cellular flows

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    The problem of front propagation in a stirred medium is addressed in the case of cellular flows in three different regimes: slow reaction, fast reaction and geometrical optics limit. It is well known that a consequence of stirring is the enhancement of front speed with respect to the non-stirred case. By means of numerical simulations and theoretical arguments we describe the behavior of front speed as a function of the stirring intensity, UU. For slow reaction, the front propagates with a speed proportional to U1/4U^{1/4}, conversely for fast reaction the front speed is proportional to U3/4U^{3/4}. In the geometrical optics limit, the front speed asymptotically behaves as U/lnUU/\ln U.Comment: 10 RevTeX pages, 10 included eps figure

    Status of two studies on active control of aeroelastic response

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    The application of active control technology to the suppression of flutter has been successfully demonstrated during two recent studies in the Langley transonic dynamics tunnel. The first study involved the implementation of an aerodynamic-energy criterion, using both leading- and trailing-edge controls, to suppress flutter of a simplified delta-wing model. Use of this technique has resulted in an increase in the flutter dynamic pressure of approximately 12 percent for this model at a Mach number of 0.9 Analytical methods used to predict the open- and closed-loop behavior of the model are also discussed. The second study, was conducted to establish the effect of active flutter suppression on a model of the Boeing B-52 Control Configured Vehicle (CCV). Some preliminary results of this study indicate significant improvements in the damping associated with the critical flutter mode

    Ultrasound-guided trans-rectal high-intensity focused ultrasound (HIFU) for advanced cervical cancer ablation is feasible: a case report.

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    High-intensity focused ultrasound (HIFU) is an ablative treatment undergoing assessment for the treatment of benign and malignant disease. We describe the first reported intracavitary HIFU ablation for recurrent, unresectable and symptomatic cervical cancer.A 38 year old woman receiving palliative chemotherapy for metastatic cervical adenocarcinoma was offered ablative treatment from an intracavitary trans-rectal HIFU device (Sonablate® 500). Pre-treatment symptoms included vaginal bleeding and discharge that were sufficient to impede her quality of life. No peri-procedural adverse events occurred. Symptoms resolved completely immediately post-procedure, reappeared at 7 days, increasing to pre-procedural levels by day 30.This first time experience of intracavitary cervical HIFU suggests that it is feasible for palliation of advanced cervical cancer, with no early evidence of unexpected toxicity. Ethical approval had also been granted for the use of per-vaginal access if appropriate. This route, alone or in combination with the rectal route, may provide increased accessibility in future patients with a redesigned device more suited to trans-vaginal ablations.Intracavitary HIFU is a potentially safe procedure for the treatment of cervical cancer and able to provide symptomatic improvement in the palliative setting
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