A talk by Joshua W. Brown, Ph.D.Department of Psychological & Brain SciencesProgram in Neuroscience,Cognitive Science Program Indiana University-Bloomington
“Combined functional neuroimaging and computational neural modeling of medial prefrontal cortex in cognitive tasks”
Wednesday, September 23, 2009
4:00 p.m.Psychology Building, Room 101
Tuesday, September 22, 2009
Hearing-Loss Simulation as a Tool for Understanding the Role of Audibility in Hearing Impairment
Charlotte M. Reed
Ph.D.Senior Research Scientist
Research Laboratory of Electronics
Massachusetts Institute of Technology
Wednesday, October 7, 2009Time: 4:00 p.m.Location: IU Speech & Hearing Center, Room C141This presentation is part of an Advanced Knowledge Seminar funded by the IU Institute for Advanced Study.
Comparisons of performance between normal-hearing (NH) and hearing-impaired (HI) listeners are intrinsically complicated by the difference in absolute thresholds between the two groups. One approach towards making more valid comparisons between NH and HI listeners is through the use of functional simulations of hearing loss in which stimuli are equated for both sound-pressure level and sensation level in both groups of listeners. This talk will present an overview of a research program using hearing-loss simulation to examine the role of threshold elevation and audibility in the speech-reception and psychoacoustic abilities of HI listeners. The hearing-loss simulation paradigm employs a combination of spectrally-shaped masking noise and multi-band expansion which is applied to stimuli presented to NH listeners. The research includes a study of the release of masking for speech using interrupted versus continuous noise backgrounds, as well as a variety of psychoacoustic measurements addressed towards understanding these results.
Ph.D.Senior Research Scientist
Research Laboratory of Electronics
Massachusetts Institute of Technology
Wednesday, October 7, 2009Time: 4:00 p.m.Location: IU Speech & Hearing Center, Room C141This presentation is part of an Advanced Knowledge Seminar funded by the IU Institute for Advanced Study.
Comparisons of performance between normal-hearing (NH) and hearing-impaired (HI) listeners are intrinsically complicated by the difference in absolute thresholds between the two groups. One approach towards making more valid comparisons between NH and HI listeners is through the use of functional simulations of hearing loss in which stimuli are equated for both sound-pressure level and sensation level in both groups of listeners. This talk will present an overview of a research program using hearing-loss simulation to examine the role of threshold elevation and audibility in the speech-reception and psychoacoustic abilities of HI listeners. The hearing-loss simulation paradigm employs a combination of spectrally-shaped masking noise and multi-band expansion which is applied to stimuli presented to NH listeners. The research includes a study of the release of masking for speech using interrupted versus continuous noise backgrounds, as well as a variety of psychoacoustic measurements addressed towards understanding these results.
Wednesday, September 16, 2009
MathMatters GrowIndiana Americorps Tutors Wanted!
Call Out Meetings!
Looking for students interested in tutoring Elementary and Middle school students in areas of Math and Science. To gain more information please attend one of our call out meetings at the following times:
Sept. 16 10:00am or 3:00pm (Room 2110 Education Building)
Sept. 18 5:00pm (Room 2110 Education Building)
Sept 21 6:00pm (Ballantime Rm 006)
Please contact Zach Horwitz (zhorwitz@indiana.edu or Andrew Cloran(acloran@indiana.edu)with any questions that you may have. Thank you!
Looking for students interested in tutoring Elementary and Middle school students in areas of Math and Science. To gain more information please attend one of our call out meetings at the following times:
Sept. 16 10:00am or 3:00pm (Room 2110 Education Building)
Sept. 18 5:00pm (Room 2110 Education Building)
Sept 21 6:00pm (Ballantime Rm 006)
Please contact Zach Horwitz (zhorwitz@indiana.edu or Andrew Cloran(acloran@indiana.edu)with any questions that you may have. Thank you!
Tuesday, September 15, 2009
Colloquium: Christopher Kello
You are invited to the following School of Informatics and Computing Colloquium.
Christopher Kello, University of California, Merced, will present, "Critical Branching Neural Computation."
Friday, September 18, 2009
3:00 p.m.
Lindley Hall, Rm. 102
Abstract:
Brain networks transmit and process information via action potentials (i.e. spikes) generated by neurons and transmitted via synapses. Spiking activity, as quantified by sums of spikes over neurons, cannot overly expand or contract over time. Stability is achieved in the balance, and can be expressed in terms of critical branching. I present a spiking neural network model with a local tuning algorithm that converges spiking dynamics to their critical branching point. The model is used as a liquid state machine to examine its computational capacity as defined by the effects of perturbations (e.g. environmental inputs) to spiking dynamics. The model exhibits maximal capacity near the critical branching point, as well as power law distributions and fluctuations in spiking activity. These power laws are observed in various measures of neural and behavioral activities, suggesting that critical branching may indicate and illustrate a general principle of cognition.
Christopher Kello, University of California, Merced, will present, "Critical Branching Neural Computation."
Friday, September 18, 2009
3:00 p.m.
Lindley Hall, Rm. 102
Abstract:
Brain networks transmit and process information via action potentials (i.e. spikes) generated by neurons and transmitted via synapses. Spiking activity, as quantified by sums of spikes over neurons, cannot overly expand or contract over time. Stability is achieved in the balance, and can be expressed in terms of critical branching. I present a spiking neural network model with a local tuning algorithm that converges spiking dynamics to their critical branching point. The model is used as a liquid state machine to examine its computational capacity as defined by the effects of perturbations (e.g. environmental inputs) to spiking dynamics. The model exhibits maximal capacity near the critical branching point, as well as power law distributions and fluctuations in spiking activity. These power laws are observed in various measures of neural and behavioral activities, suggesting that critical branching may indicate and illustrate a general principle of cognition.
The Business Minors
You are cordially invited to a workshop to learn about the various Business minors available to all IUB students.
September 22, 2009
3:00-4:00 p.m.
BU 736
This advising seminar will be presented by the Kelley School Undergraduate Advisors. All students, staff, and faculty are welcome to attend!
September 22, 2009
3:00-4:00 p.m.
BU 736
This advising seminar will be presented by the Kelley School Undergraduate Advisors. All students, staff, and faculty are welcome to attend!
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