| kaushikghose |
Postdoctoral
associate, Neurobiology, Harvard Medical School, Boston, MA
|
| email |
kaushik_ghose
.at. hms.harvard.edu |
mail
|
Kaushik Ghose
Neurobiology
Harvard Medical School
220 Longwood Avenue
Boston, MA 02115, USA |
|
degrees and positions
Post Doc, Harvard Medical School, Neurobiology, Boston,
MA, USA [maunsell
lab]
Post Doc,
Institute for Systems Research, Univ. Maryland, College Park, USA [batlab,
CSSL,
ISL]
Ph.D.in Neuroscience and
Cognitive Science,
Univ. Maryland,
College Park, USA [batlab]
M.S in Systems Science and Automation, Indian
Institute of Science, Bangalore, India
B.E. in Electrical Engineering, Jadavpur
University, Calcutta, India
research
I
want to know how brains work.
I am currently interested in understanding integrative processes in the
brain. From past study we know that sensory information and internal
states are represented in the activity of groups of neurons spread all
over cortex. I'm interested in knowing how the brain picks out and then
combines together spatially disparate groups of neurons that are
important for a given behavioral task.
For
my doctoral degree I investigated target pursuit behavior in echolocating bats [learn more...].
For my masters degree I worked on, among other things, acoustic echo cancellers for telecommunication [learn more...].
outreach
I love sharing my joy of science with others.
I wrote this piece on
bats on invitation from Imagine magazine.
It is meant for a lay audience.
I
wrote this piece on my
student life in Maryland on invitation from
the International
Society for Neuroethology for the society newsletter.
I
have judged several science fairs, and have been to several
elementary and middle schools in Maryland with my PhD. advisor Cynthia
Moss to talk about bats.
publications
bat echolocation and flight behavior
Echolocating bats fly around in darkness emitting ultrasonic sounds and
listening for the echoes that return from things like tasty insects
flying nearby. The bats use the echo information to locate the
insects and chase them with breathtaking high speed maneuvers. I was
interested in knowing what kind of computations the bat's brain may be
doing in order to turn sensory information into a flight strategy. I
designed and built apparatus to
measure
the sonar beam patterns of
flying bats. I made observations of bat
flight behavior and mathematically modeled the flight strategies they
use to capture insects. I showed how the bat's acoustic gaze
(where it
directs its sonar beam) is related to its flight pattern and may be
used to gain insight into what the bat is planning. I also showed how
the bat optimizes its flight strategy to chase unpredictably moving
insects in order to improve its chances of a quick, successful capture.
Kaushik Ghose, Jeffrey D. Triblehorn, Kari Bohn, David D. Yager and
Cynthia F. Moss (2009) Behavioral responses of big brown bats to dives
by praying mantises. J. Exp. Biol. 212,693 -703. (fulltext,
pdf)
We got featured in the
"Inside JEB" section with this
blurb!
Kaushik Ghose, Timothy K. Horiuchi and Cynthia F. Moss
(2007) Flying big brown bats emit a beam with two lobes in
the
vertical plane. Journal of the Acoustical Society of America, 122(2),
3717-3724. (pdf)
Kaushik
Ghose (2006) Sonar
Beam Direction and Flight Control in an Echolocating Bat.
PhD. Thesis (pdf)
Kaushik Ghose, Timothy K. Horiuchi, P.S. Krishnaprasad and Cynthia F.
Moss (2006) Echolocating
bats use a nearly time-optimal strategy to intercept prey.
Public Library of Science: Biology,
4(5), (pdf)
The idea that bats use a
parallel navigation strategy similar to guided missiles made for good
copy on
The
Hindu,
Science
Daily and other parts of the
internet.
Kaushik Ghose and Cynthia F. Moss (2006) Steering by Hearing: A Bat’s Acoustic Gaze
Is Linked to Its Flight Motor Output by a Delayed, Adaptive Linear Law.
Journal of Neuroscience, 26(6), 1704-1710. (pdf)
Supplementary video S1,
S2
, Publicity
video.
Discovery
channel interviewed me as part of a
short piece
on the Steering by Hearing paper on
February 9th 2006.
Kaushik Ghose and Cynthia F. Moss (2003) The
sonar beam pattern of a flying bat as it tracks moving and stationary
prey. Journal of the Acoustical society of America,
114(2), 1120-1131. (pdf)
Beam
pattern animations
acoustic echo cancellers
When you speak to someone who is using a speaker phone, or when you
chat with some one else who is not using headphones, you can often get
an annoying echo of your own voice. This occurs because whatever you
say gets broadcast into the other person's room, bounces
around, gets picked up by their mike, and then gets played back to
you along with whatever the other person is saying. This feedback can
get extremely annoying. Acoustic echo cancellers are clever devices
that try and estimate the 'room transfer function' of some one else's
room. They try to estimate, based on whatever you just said, what the
echo of that will sound like as it gets fed back to you. This estimate
is then subtracted from the sound being fed to your speakers/headphones
so that you will only hear the other person's voice, and not the echo
of your own voice.
[with VU Reddy]
Kaushik Ghose
and V. Umapathi Reddy (2000) A
double-talk detector for acoustic echo cancellation applications.
Signal Processing, 80 (8), 1459-1467. (pdf)
Kaushik Ghose (1999) A
double-talk detector for acoustic echo cancellation applications.
Masters Thesis. (pdf)
software
| NeuraPy |
 |
A collection of python modules for data analysis. Currently includes |
| PyLablib |
a python module to read lablib datafiles |
| PyNev |
[BETA] a python module to read Cerebus datafiles (.nev and .ns3) |
| RRiki |
 |
A research notes and references organizer |
| Chhobi |
 |
A picture organizing program |
Current analysis toolchain
python, matplotlib, parallelpython, mencoder, inkscape, lyx
Last Updated: Nov 2009