THE BOSTON AREA PHYSICS CALENDAR
        Week of February 4-February 10, 1996

The Boston Area Physics Calendar is published weekly during 
the academic year by the Department of Physics and Astronomy 
at Tufts University.  You may send your announcements by 
e-mail (bapc@tuhepa.phy.tufts.edu) or FAX:(617-627-3878).  
We cannot accept announcements by telephone.  Entries should 
reach us no later than 11:00am on the Monday preceding the week 
of the event. ENTRIES RECEIVED AFTER THE DEADLINE WILL NOT 
BE PUBLISHED.           
                
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               Monday, February 5, 1996
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Monday, February 5,1996, 2:00 p.m.

Massachusetts Institute of Technology
Monday Research Seminar
Building 6, Third Floor
Center for Theoretical Physics Seminar Room
{large ``D-branes and Topological Field theories''
PROFESSOR MICHAEL BERSHADSKY
Harvard University
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Monday, February 5,1996, 4:30 p.m.

Brown University
Colloquium
Barus char38 enskip Holley, Room 168
``Atomic and Solid State Physics with Positrons''
DR. ALLEN P. MILLS
AT & T Bell Laboratories
Refreshments will be served at 4:00 p.m.
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Monday, February 5,1996, 4:30 p.m.

Harvard University
Colloquium
Jefferson Building, Room 250
``Quantization: Some Issues in Kinematics and Dynamics''
PROFESSOR ANDREW LESNIEWSKI
Harvard University
Tea will be served in Jefferson 461 at 4:00 p.m.

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               Tuesday, February 6, 1996
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Tuesday, February 6,1996, 2:30 p.m.

Harvard University
CfA-Tufts-MIT Cosmology Seminar
Pratt Conference Room, CfA
**** Note Change in Room for this Semester ****
``Interpreting Data on Large-Scale Bulk Flows''
DR. RICK WATKINS
Dartmouth College
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Tuesday, February 6,1996, 3:30 p.m.

Boston University
Colloquium
Room SCI-107, 590 Commonwealth Avenue
``Exploring the Physics of Low Dimensional Metals''
PROFESSOR K. SMITH
Boston University
Refreshments will be served following the talk.
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Tuesday, February 6,1996, 4:00 p.m.

Northeastern University
CIRCS Seminar
114 Dana
``Multiscale and statistical signal processing methods for
inverse scattering problems''
PROFESSOR E. MILLER
Department of Computer char38 enskip Electrical Engineering, 
Northeastern University
Refreshments will be served at 3:45 p.m.

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               Wednesday, February 7, 1996
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Wednesday, February 7,1996, 1:15 p.m.

Harvard University
Special Condensed Matter Theory Seminar
Pierce 100F
``Duality Symmetrics in String Theory''
PROFESSOR CUMRUN VAFA
Harvard University
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Wednesday, February 7,1996, 3:00 p.m.

Massachusetts Institute of Technology
Joint Lattice Seminar
Building 6, Third Floor
Center for Theoretical Physics Seminar Room
``Light Quark Masses from Lattice QCD''
DR. BRIAN GOUGH
Fermilab
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Wednesday, February 7,1996, 4:30 p.m.

Harvard University
Joint Theory Seminar
Jefferson 256
``Duals of SUSY gauge theories with adjoint matter''
DR. JOHN TERNING
Boston University

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               Thursday, February 8, 1996
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Thursday, February 8,1996, 4:00 p.m.

Clark University
Physics Colloquium
Sackler Science Center, Room N-105
``The Physics of Monolayer Polymers''
DR. ELIZABETH MANN
Institut Charles Sadron
Strasbourg, FRANCE
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Thursday, February 8,1996, 4:00 p.m.

Harvard-Smithsonian Center for Astrophysics
Scientific Colloquium
60 Garden Street (Phillips Auditorium)
``Molecular Absorption at Intermediate Redshift''
DR. FRANCOISE COMBES
Observatoire de Paris, Paris, France
 
Abstract:
 
Molecular absorption in front of radio-loud quasars is a unique tool to probe
cold gas at high redshifts, with the benefit of high angular and velocity
resolutions. They can reveal intervening galaxies, as well as internal
gas or molecular torus, that would not have been detectable in
emission. While very low column densities can be sampled in
the optical or ultra-violet (from N(HI)= 10$^{13}$ cm$^{-2}$),
absorption of quasar millimetric light by molecules probe cold and dense
gas between N(H$_2$)= 10$^{20}$ et 10$^{24}$ cm$^{-2}$, and the intermediate
range is covered at 21 cm (and redshifted) range.
smallskip
In the millimetric domain, we have observed with Tommy Wiklind,
a sample of 50 mm-continuum sources, and to now detected four absorption
systems, with up to 20 molecular lines detected in a single object
(HCO$^+$, HNC, HCN, N$_2$H$^+$, C$^{18}$O, CS, H$_2$CO, CN, etc....).
Molecular abondances, excitation temperatures can be studied in
detail in these remote galaxies. The diffuse components allow us to obtain
an upper limit on the cosmic black body temperature as a function of redshift.
Many absorbing objects in the millimeter domain play the role
of gravitational lenses wich produce several images of the quasar.
The absorption measurements then contribute to the determination 
of cosmographic parameters, H$_0$ et q$_0$.par
 
Tea will be served at 3:30 p.m.
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Thursday, February 8,1996, 4:05 p.m.

Northeastern University
Joint High Energy-Condensed Matter Seminar
114 Dana
``Random Matrix Theory Beyond the Sigma Model via the 
Supersymmetry Method''
VLADAN LUCIC
Northeastern University
Refreshments served at 3:50 p.m.
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Thursday, February 8,1996, 4:15 p.m.

Massachusetts Institute of Technology
Physics Colloquium
Room 10-250
``LIGO: Progress Toward Gravitational Wave Detection''
DAVID SHOEMAKER
Massachusetts Institute of Technology
Refreshments served in Room 26-110 at 3:45 p.m.
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Thursday, February 8,1996, 4:30 p.m.

Brown University
Condensed Matter Seminar
Barus char38 enskip Holley, Room 751
``A Random Walk Beyond Hartree-Fock''
DR. JIM GUBERNATIS
Los Alamos National Laboratory
Theoretical Division
 
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                 Friday, February 9, 1996
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			No Scheduled Events. 



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                  A Friendly Reminder: 
The Deadline for the Feb. 11-Feb. 17, 1996 Issue is: 
MONDAY, February 5, 1996 at 11:00 a.m.
  
  
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