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Analysis of a Queueing Model with Batch Markovian Arrival Process and General Distribution for Group Clearance
No full textIn this paper we consider a single server queueing model with under general bulk service rule with infinite upper bound on the batch size which we call group clearance. The arrivals occur according to a batch Markovian point process and the services are generally distributed. The customers arriving after the service initiation cannot enter the ongoing service. The service time is independent on the batch size. First, we employ the classical embedded Markov renewal process approach to study the model. Secondly, under the assumption that the services are of phase type, we study the model as a continuous-time Markov chain whose generator has a very special structure. Using matrix-analytic methods we study the model in steady-state and discuss some special cases of the model as well as representative numerical examples covering a wide range of service time distributions such as constant, uniform, Weibull, and phase type
No Date: CS 601 Programming Methods for Data Science
No full textThe new MS in Data Sciences program is desiring to attract a broader range of students from disciplines other than Computer Science. This course will bring them up to speed on the basics of programming and data access
No Date: CS457 Wireless and Mobile Security
No full textCS 457 had a separate lab section from the classroom lecture, but these are being integrated into a lecture only with exercises embedded into the classroom experience rather than being provided in a separate lab section
Experimental Test of Extrapolated Acoustic Output Using Single-Element Transducers
No full textTo ensure the continued safety of diagnostic ultrasound, accurate measurements of the acoustic output from clinical devices are necessary. The effects of nonlinear propagation can cause the current derating method to substantially underestimate relevant values in tissue. One suggested method to overcome this is to measure acoustic output parameters at low levels and extrapolate to values at full output. Tissue mimicking material were produced from concentrated milk. The samples had low scatter but speed of sound, attenuation, and nonlinear parameter B/A consistent with nonfatty soft tissues. Measurements of acoustic output from single element transducers were conducted at a wide variety of transmit levels in both water and through a path consisting mostly of tissue mimicking material. Results of peak rarefactional pressure and MI/MIE using tissue mimicking material at high pressure levels were consistent with extrapolated derated values from low level measurements in water. This agreement was true for the six measured transducers, which spanned a range of center frequencies from 2.0 MHz to 15.0 MHz. These results indicate that it may be possible to use low level transmit pulses in water, derate the measured values, and extrapolate those results to the higher pressure levels typically used in diagnostic ultrasonography
June 19, 2020: Covid-19 Update and Safe Return to Campus Update Vol. 5
Get PDFThe following campus update provides important information and guidelines for a Safe Return to Campus for Summer Term, starting July 13
