Week of December 10-December 16, 1995 

            THE BOSTON AREA PHYSICS CALENDAR
          Week of December 10-December 16, 1995 

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 ENTRIES RECEIVED AFTER THE DEADLINE WILL NOT 
BE PUBLISHED.           
                
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               Sunday, December 10, 1995 
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Sunday, December 10, 1995, 9:00 a.m. - 4:00 p.m.

Harvard University
Golden Jubilee of NMR at Harvard 
Science Center Hall C

This is a day-long conference. 

Speakers:
 
H.TORREY, R. POUND, E. PURCELL, N. RAMSEY, 
N. BLOEMBERGEN, D. McCALL, E. HAHN, 
C. SLICHTER, A. PINES, R. ANDREW, 
M. WEISS, and G. PAKE

This Conference is open to the public, free of charge, but
meals must be prepaid by underbar {November 30th}.
Contact Bonnie Currier for pre-registration.
 
Phone:  (617-495-2866) or 
E-mail:  (currier@physics.harvard.edu).

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               Monday, December 11, 1995 
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Monday, December 11, 1995, 12:15 p.m.

Massachusetts Institute of Technology
LNS Special Seminar 
LNS Kolker Room, 26-414
``The Photon Program at MAX-Lab''
DR. KEVIN FISSUM
MAX-Lab Lund University, SWEDEN 

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Monday, December 11, 1995, 2:00 p.m.

Massachusetts Institute of Technology
Monday Research Seminar 
Center for Theoretical Physics Seminar Room
Building 6, Third Floor
``Next to leading order thermal corrections and 
the hot phase of a universe''
GIOVANNI AMELINO-AMELIA
Oxford University 

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Monday, December 11, 1995, 4:30 p.m.

Harvard University
Physics Colloquium 
Jefferson Building, Room 250
``Life, the Universe and Nothing; The Case for a 
Cosmological Constant''
PROFESSOR LAWRENCE KRAUSS
Tea will be served in Jefferson 461 at 4:00 p.m. 

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Monday, December 11, 1995, 2:30 p.m.

Brown University
Theoretical Seminar 
Barus char38  enskip Holley Building, Room 555
``Toisson Brackets of Wilson Loops''
PROFESSOR O. TURGUT
Rochester University 

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Monday, December 11, 1995, 4:30 p.m.

Brown University
Colloquium 
Barus char38  enskip Holley Building, Room 168
``Quasars:  A Multiwavelength View''
PROFESSOR SMITA MATHUR
Harvard-Smithsonian Center for Astrophysics
Refreshments will be served at 4:00 p.m. 

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               Tuesday, December 12, 1995 
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begin{flushleft}
Tuesday, December 12, 1995, 11:00 a.m.

Massachusetts Institute of Technology
Joint Lattice Seminar 
Center for Theoretical Physics Seminar Room
Building 6, Third Floor
``Heavy Quark Physics with Lattice QCD''
PROFESSOR AIDA EL-KHADRA
Illinois Unity 

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Tuesday, December 12, 1995, 12:00 noon

Massachusetts Institute of Technology
Condensed Matter Seminar 
Room 12-132
``Divide-and-Conquer Treatments of Correlated Electrons''
PROFESSOR SHOUDAN LIANG
Pennsylvania State University 

Abstract:

A numerical renormalization group treatment of a correlated system
requires the existence of an extended range of energy scales in the
hamiltonian.  The presence of such an energy scale hierarchy is often
not evident.  We argue that the hierarchy of scales in the correlation
energy can be brought about by a suitable transformation of the single
particle orbitals. We formulate a variational procedure to select the
optimal orbitals for a general hamiltonian.  Our method treats
correlation effects left out from the Hartree-Fock theory
systematically.  Thus, our method is completely general, applicable to
atoms and molecules.  We will present a calculation for an exactly
solvable model where our calculated low energy spectrum is compared to
the exact spectrum.

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Tuesday, December 12, 1995, 2:30 p.m.

Massachusetts Institute of Technology
Joint Tufts--CfA--MIT Cosmology Seminar 
Center for Theoretical Physics Seminar Room
Building 6, Third Floor
``A Lower Limit on the Age of the Universe''
PROFESSOR LAWRENCE KRAUSS
Case Western Reserve University 

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Tuesday, December 12, 1995, 4:15 p.m.

Massachusetts Institute of Technology
Astrophysics Colloquium 
The Marlar Lounge, Room, 37-252
``Black Hole X-Ray Novae''
DR. JEFFREY E. McCLINTOCK
Harvard-Smithsonian Center for Astrophysics 
Refreshments will be served at 3:45 p.m.

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Tuesday, December 12, 1995, 4:15 p.m.

Massachusetts Institute of Technology
LNS Colloquium 
LNS Kolker Room, 26-414
``Light Quark Dynamics, Electromagnetic Meson Production,
and New Opportunities at Bates''
PROFESSOR ARON BERNSTEIN 
Refreshments will be served in Room 26-110 at 3:45 p.m.

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Tuesday, December 12, 1995, 4:30 p.m.

Harvard University
Harvard-M.I.T. Mathematical Physics Seminar 
Science Center 507
``Mathematical Questions Related to Mirror Maps''
PROFESSOR S.T. YAU
Harvard University 

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               Wednesday, December 13, 1995 
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Wednesday, December 13, 1995, 4:30 p.m.

Massachusetts Institute of Technology
Joint Theory Seminar 
Building 6, Third Floor
``Black Holes, Strings and P-branes''
PROFESSOR ANDREW STROMINGER
University of California at Santa Barbara 
Refreshments will be served at 4:00 p.m.

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               Thursday, December 14, 1995 
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Thursday, December 14, 1995, 12:00 noon

Harvard University
Condensed Matter Theory Seminar 
Pierce 100F
``Thermal nucleation of kink-antikink pairs''
FABIO MARCHESONI
University of Perugia char38 enskip 
visiting scholar at Harvard University 

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Thursday, December 14, 1995, 2:30 p.m.

Brown University
Theoretical Seminar 
Barus char38  enskip Holley Building, Room 555
``The Dimensionally Reduced Effective Theory of QCD 
at High Temperature with Quarks''
PROFESSOR SUZHOU HUANG
Massachusetts Institute of Technology 

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Thursday, December 14, 1995, 3:00 p.m.

Harvard University
Special Theory Seminar 
Jefferson 256
``Algebras, BPA states, and Strings''
PROFESSOR J. HARVEY
University of Chicago 

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Thursday, December 14, 1995, 3:30 p.m.

Harvard University
High Energy Physics Seminar 
HEPL Third Floor Conference Room
``Gluon Spin in the Nucleon''
PROFESSOR ROBERT JAFFE
Massachusetts Institute of Technology char38 enskip Harvard University 
Cookies will be served!

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Thursday, December 14, 1995, 4:00 p.m.

Harvard-Smithsonian Center for Astrophysics
Scientific Colloquium 
60 Garden Street (Phillips Auditorium)
``The Collimation and Propagation of Stellar Jets''
DR. ADAM FRANK
University of Minnesota 

Abstract:

The production of well collimated supersonic jets appears to be a ubiquitous
feature of star formation.  While the propagation of these jets has been
well studied their origin remains a subject of considerable controversy.
Currently the consensus is that MHD processes are required to produce
stellar jets.

In this talk I will present new results which revisit the issue of
purely hydrodynamical jet collimation. In a recently completed study
I have focused on the collimation of an initially spherical outflow
from a young star through its interaction with the environment: a cloud core
with a toroidal density distribution. High resolution
numerical simulations show that a number of non-linear, time-dependent
mechanisms can be quite effective in collimating the wind
into a a fully supersonic jet.  These mechanisms were either not considered
or not fully appreciated in previous analytical studies.

The physics of the collimated flow is complicated.  However
using analytical models it is possible to understand the behavior
observed in the simulations as a mix of wind-blown bubble and jet
dynamics.  I will discuss the evolution of the young jets
as well as the physical processes which produce the collimation
including deLaval nozzles and "shock focusing".

Finally the application to real YSOs will be discussed and I will compare
the collimating mechanisms seen in these simulations with previous work
in the field.

Tea will be served at 3:30 p.m. 

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              Friday, December 15, 1995 
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Friday, December 15, 1995, 12:00 noon 

Boston University
Particles and Fields Seminar
Physics Research Building, Room 593
``Search for extraterrestrial dark matter ...brown dwarfs''
PROFESSOR M. SPIRO
Center for Research, Saclay, France

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Friday, December 15, 1995, 4:00 p.m.

Harvard University
Condensed Matter Seminar
Division of Applied Sciences 
Pierce Hall 209
``Two-Dimensional Melting: 
Large Scale Molecular Dynamics Studies''
TED KAPLAN
Oak Ridge National Laboratory 
Refreshments will be served in the Brooks Room 
following the seminar.

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Friday, December 15, 1995, 4:30 p.m.

Harvard University
Seminar on Probability, Analysis and Mathematical Physics
Jefferson 356
``Introduction of a Laplacian of Spaces of Paths''
DANIEL STROOCK
Massachusetts Institute of Technology 
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			A Friendly Reminder: 

The Deadline for the Dec.17-Dec. 23, 1995 Issue is: 

LARGE Monday, December 11, 1995 at 11:00 a.m. 

This is the end of the document.