88,955 research outputs found
Procession led by Colonel Charles F. Hudson and Captain Church A. Chappell at Commencement
No full textThe 1949 Commencement Procession being led led by Colonel Charles F. Hudson and Captain Church A. Chappell
Active control with dielectric barrier discharge actuators applied to high-lift devices
No full textAn experimental investigation examined the capability of dielectric barrier discharge (DBD) actuators to control a high-lift device system. Aerodynamic tests investigated the potential of utilising the actuator to control the flap side-edge vortex flow field. Acoustic tests examined the attenuation of slat noise with a DBD actuator. The sparse knowledge related to the control of a vortex flow field with a DBD actuator necessitated a more fundamental study that used a NACA 0015 wing. From this study, it was shown that the application of control resulted in a more diffused tip vortex. The actuator's ability to control the evolving vortex flow field was weakly dependent on the Reynolds number but strongly dependent on the angle of attack. Consequently, a DBD actuator was applied to a flap side edge. However, it was concluded that the actuator had no discernible effect on the flow field due to its addition of momentum being too low to destabilise the formation of the flap side-edge vortex. The slat research concerned the attenuation of the leading-edge component of high-lift device noise. At an angle of attack of two degrees, several tonal noise components with broadband content appeared in the slat noise spectrum. These noise features were successfully suppressed with a DBD actuator operating in open-loop control. For closedloop control, a quasi-static feedback controller was implemented. Comparable levels of performance were obtained for both control methods with more than a 20 dB reduction achieved in the dominant tonal noise feature. The research conducted shed new light on the application of DBD actuators to control the high-lift device system. However, further research is needed if the device is to be utilised to control flap side-edge flow field. The attenuation of slat tonal noise with broadband content was achieved with the actuator
The Night has a Thousand Eyes. / Words by / F. W. BOURDILLON. / Music by / FRANK LAMBERT.
No full textBox no. 6Lambert's lifedates according to https://imslp.org/index.php?title=Category:Lambert,_Frank&oldid=2748425;
published in the series "Series of Short Songs"Frank Lambert: The Night Has a Thousand Eyes; Series of Short Songs; Chappell & Co. Ltd.; music printItem type: book | Content type: music | Writing material: black ink | Counting of pages: page numbersVocal-instrumental score | staff notation | voice; piano"The night has a thousand eyes, the day but one [...]
Establishing a Standardized Clinical Assessment Tool of Pathologic and Prosthetic Hand Function: Normative Data, Reliability, and Validity
No full textABSTRACT. Light CM, Chappell PH, Kyberd PJ. Establishing a standardized clinical assessment tool of pathologic and prosthetic hand function: normative data, reliability, and validity. Arch Phys Med Rehabil 2002;83:776-83. Objective: To develop a new assessment procedure, the Southampton Hand Assessment Procedure (SHAP), that allows contextual results of hand function to be obtained readily in a clinical environment. Design: Reliability (test-retest, interrater) and validity (criterion, content) of new assessment procedure against standard medical outcome measure techniques. Setting: Normative data collected in a university laboratory. Participants: Twenty-four volunteers selected on the basis of optimum hand function using these criteria: age (range, 18-25y), and no adverse hand trauma, neurologic condition, or disabling effects of the upper limb. Interventions: Not applicable. Main Outcome Measures: The normative control group was assessed for variability, and the procedure measured in terms of interrater and test-retest reliability. The absence of a direct comparison prevents a criterion standard from being established; however, content validity was shown by expert peer review. Results: The control group data were shown to be multivariate gaussian; test-retest and interrater reliability were demonstrated at the 95% confidence level. The content validity was demonstrated by peer panel approval. Conclusions: Results of the control group established the statistical integrity of SHAP. Clinical trials are underway, although more extensive use of the procedure is advocated in primary care and rehabilitation centers where physiotherapy and occupational therapy are actively used in hand rehabilitation
Review of Mexico’s Evolving Democracy: A Comparative Study of the 2012 Elections, edited by Jorge I. Domínguez, Kenneth F. Greene, Chappell H. Lawson, Alejandro Moreno
No full textMexico’s Evolving Democracy: A Comparative Study of the 2012 Elections, edited by Jorge I. Domínguez, Kenneth F. Greene, Chappell H. Lawson, Alejandro Moreno. Johns Hopkins University Press, 2014
Review of Mexico’s Evolving Democracy: A Comparative Study of the 2012 Elections, edited by Jorge I. Domínguez, Kenneth F. Greene, Chappell H. Lawson, Alejandro Moreno
No full textMexico’s Evolving Democracy: A Comparative Study of the 2012 Elections, edited by Jorge I. Domínguez, Kenneth F. Greene, Chappell H. Lawson, Alejandro Moreno. Johns Hopkins University Press, 2014
Control strategies for a multiple degree of freedom prosthetic hand
No full textSome of the traditional methods used to control a conventional prosthetic device are described alongside the current state of new control techniques and how they may progress. The review includes implantable myoelectric sensors and describes the potential of connecting directly to the peripheral nervous system. Control methods are then deduced for each technique, where the application is a six degrees of freedom hand having integral slip, force and temperature sensors
Validation and application of a computational model for wrist and hand movements using surface markers
No full textA kinematic model is presented based on surface marker placement generating wrist, metacarpal arch, fingers and thumb movements. Standard calculations are used throughout the model and then applied to the specified marker placement. A static trial involving eight unimpaired participants was carried out to assess inter-rater reliability. The standard deviations across the data were comparable to manual goniometers. In addition, a test retest trial of ten unimpaired participants is also reported to illustrate the variability of movement at the wrist joint, metacarpal arch, and index finger as an example of model output when repeating the same task many times. Light and heavyweight versions of the tasks are assessed and characteristics of individual movement strategies presented. The participant trial showed moderate correlation in radial/ulnar deviation of the wrist ( = 0 65), and strong correlation in both metacarpal arch joints ( = 075 and = 085), the MCP ( = 079), and PIP ( = 087) joints of the index finger. The results indicate that individuals use repeated strategies of movement when lifting light and heavyweight versions of the same object, but showed no obvious repeated pattern of movement across the population
Heparinase selectively sheds heparan sulphate from the endothelial glycocalyx
No full textA healthy vascular endothelium is coated by the endothelial glycocalyx. Its main constituents are transmembrane syndecans and bound heparan sulphates. This structure maintains the physiological endothelial permeability barrier and prevents leukocyte and platelet adhesion, thereby mitigating inflammation and tissue oedema. Heparinase, a bacteria] analogue to heparanase, is known to attack the glycocalyx. However, the exact extent and specificity of degradation is unresolved. We show by electron microscopy, immunohistological staining and quantitative measurements of the constituent parts, that heparinase selectively sheds heparan sulphate from the glycocalyx, but not the synclecans
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