Next week at CCA: CCA September 21st - 25th

Sep 21, 2020, 2:00 AM → Sep 25, 2020, 4:30 PM America/New_York

Classroom (Flatiron Institute)

Next week at CCA September 21st  - 25th, 2020

 

Here is the link to the Simons Foundation youtube if you would like to view any of our past recorded talks or events.

 

Mon Sep 21, 2020

2 pm - 3 pm Machine Learning Group Meeting

 

Wed Sep 23, 2020
12:30 pm - 2 pm Stars and Exoplanets Meeting

3 pm - 4 pm Gravitational Waves Group Meeting

 

5 pm - 6:15 pm SF Lecture: Mark Schnitzer

Gerald D. Fischbach Auditorium - 160 Fifth Avenue at 21st Street, 2nd floor

FUNDAMENTAL BOUNDS ON THE FIDELITY OF SENSORY CORTICAL CODING

 

Thu Sep 24, 2020

1:30 pm - 3 pm Compact Objects Group Meetin

 

2 pm - 3 pm Dynamics Group Meeting

 

2 pm - 7 pm Fall Introductions Event

 

Fri Sep 25, 2020

9 am - 10 am Staff Meeting 

 

11 am - 12:30 pm Galaxy Formation Group Meeting

 

12:30 pm - 2 pm Astronomical Data Internal Group Meeting

 

2 pm - 3 pm Planet Formation Group Meeting

 

3:30pm - 4:30pm CCA Colloquium: Stephon Alexander

 

Mon, September 21

2:00 AM → 3:00 AM Machine Learning Group Meeting

Machine Learning Group Meeting
Description: Please email Gabriella Contardo to join if interested in the nuts and bolts of ML x Astrophysics.

Wed, September 23

12:30 PM → 2:00 PM Stars and Exoplanets Meeting

Researchers in the NYC area working on the Milky Way, stellar astrophysics, and extra-solar planets gather to discuss projects in progress and scientific issues of mutual interest. This meeting is open.

Topic: Stars and Exoplanets Meeting You will be required to enter the password highlighted below. Password: 160162 Time: Mar 11, 2020 12:30 PM Eastern Time (US and Canada)Join from PC, Mac, Linux, iOS or Android: https://simonsfoundation.zoom.us/j/601703236

3:00 PM → 4:00 PM Gravitational Waves Group Meeting

Join from PC, Mac, Linux, iOS or Android: https://simonsfoundation.zoom.us/j/99232366362?pwd=NTFQSHVDQTlXRDlqUFBaTmlydkNjdz09 Password: 195911

5:00 PM → 6:15 PM SF Lecture: Mark Schnitzer

Gerald D. Fischbach Auditorium - 160 Fifth Avenue at 21st Street, 2nd floor
FUNDAMENTAL BOUNDS ON THE FIDELITY OF SENSORY CORTICAL CODING
Lecture 5:00 - 6:15 PM
Perception is limited by the information that the brain can extract from the noisy dynamics of sensory neurons. In this lecture, Mark Schnitzer will present a new microscope to monitor neural activity across the primary visual cortex and analyses to quantify the information conveyed by large neural ensembles. The data reveal limitations on the accuracy of sensory cortical coding due to correlated fluctuations in neural dynamics.
Seminal experiments published three decades ago suggested that correlated activity fluctuations within sensory cortical neural ensembles are what limits their coding accuracy. However, without concurrent recordings from thousands of cortical neurons with shared sensory inputs, it has remained unknown whether correlated noise limits coding fidelity. Schnitzer and colleagues found that, in the mouse visual cortex, correlated noise constrained signaling for ensembles of 800–1,300 neurons. Moreover, neural ensemble visual signals were perpendicular to the largest noise mode, which, therefore, did not limit coding fidelity. The information-limiting noise modes were approximately 10 times smaller and concordant with mouse visual acuity. Cortical design principles appear to enhance coding accuracy by restricting roughly 90 percent of noise fluctuations to modes that do not limit signaling fidelity, whereas much weaker correlated noise modes bound sensory discrimination.
Schnitzer is an HHMI Investigator and a professor at Stanford University’s applied physics and biology departments. His work has focused on the innovation and use of optical imaging technologies for understanding how large neural ensembles control animal behavior. His lab has invented several technologies now commercially available, including tiny microscopes that are small enough to be mounted on the head of a freely behaving mouse and that are currently used by more than 500 labs worldwide.
Registration is required for this free webinar.
Further instructions and access to join the webinar will be sent to all registrants upon sign up.

Registration is required for this free webinar.

Thu, September 24

1:30 PM → 3:00 PM Compact Objects Group Meeting

Description:Topic: Compact Objects Group Meeting Time: Mar 12, 2020 01:30 PM Eastern Time (US and Canada) Every week on Thu, until May 21, 2020, 11 occurrence(s) PC, Mac, Linux, iOS or Android: https://simonsfoundation.zoom.us/j/808514522

2:00 PM → 3:00 PM Dynamics Group Meeting

Dynamics Group Meeting
Description: Group members meet for workshop projects. Email Kathryn Johnston if you’d like to participate.

2:00 PM → 7:00 PM Fall Introductions Event

Fri, September 25

9:00 AM → 10:00 AM Staff Meeting

11:00 AM → 12:30 PM Galaxy Formation Group Meeting

Galaxy Formation Group Meeting
Description: By Invitation Only. Email rachel somerville if you would like to participate.

12:30 PM → 2:00 PM Astronomical Data Internal Group Meeting

Astronomical Data Internal Group Meeting
Description: Group members meet for workshop projects. Email Hogg if you’d like to participate.

2:00 PM → 3:00 PM Planet Formation Group Meeting

Topic: Planet Formation Group Meeting (2pm-3pm) You will be required to enter the password highlighted below. Password: 160162 Time: Mar 13, 2020 02:00 PM Eastern Time (US and Canada) Every week on Fri, until Jun 26, 2020, 16 occurrence(s) Join from PC, Mac, Linux, iOS or Android: https://simonsfoundation.zoom.us/j/961483602

3:30 PM → 4:30 PM CCA Colloquium: Stephon Alexander

The Story of a Halo: Chern-Simons Theory, Cosmic Inflation and Dark Genesis

All matter, visible and dark, had to originate from some mysterious event in the early universe-baryogenesis and dark-genesis. This necessary physics goes beyond our standard cosmology and the standard model of particle physics. In this colloquium, I provide a pedagogical introduction to cosmic inflation, baryogenesis and argue the necessity of Chern-Simons theory in collaboration with the quantum dynamics of cosmic inflation (but not limited to it) to explain the coincidence between the density of dark and visible matter. A surprise regarding quantum coherence in halos awaits as a result.