Physics - Bachelor's degree
http://hdl.handle.net/1721.1/7696
2018-04-12T19:19:24ZThe role of eddies in buoyancy flux
http://hdl.handle.net/1721.1/114316
The role of eddies in buoyancy flux
Ring, Michael J., 1979-
This thesis explores the role of eddies in determining the stratification of the ocean through a laboratory experiment. The experiment uses a dual-tank apparatus, with a smaller tank sitting inside the larger tank. Both tanks sit on a rotating turntable, which simulates the rotation of Earth. During the experiment, salty water is pumped from the outer tank through small holes in the base of the inner tank, which is initially filled with fresh water. The evolution of the dense fluid in the inner tank is observed, with particular regard to the number of eddies that form. These observations are checked against theoretical predictions, derived from analysis of buoyancy flux, for the number of eddies expected to form.
Thesis: S.B., Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences, 2001.; Thesis: S.B., Massachusetts Institute of Technology, Department of Physics, 2001.; Cataloged from PDF version of thesis.; Includes bibliographical references (page 35).
2001-01-01T00:00:00ZAnalyzing the large-scale curvature of interplanetary shocks
http://hdl.handle.net/1721.1/114134
Analyzing the large-scale curvature of interplanetary shocks
Vogt, Marissa Farland
The 3-dimensional structure of interplanetary shock surfaces are analyzed using observations from the Wind and ACE spacecraft. Events seen by both spacecraft were selected from the available data and used to calculate the radius of curvature R, of the shock surface. The surface structure was examined within the ecliptic plane, and evidence of large-scale curvature was seen when the spacecraft separation was sufficiently large. A simulation was run to test the effects of small errors in the shock normal, and showed that these errors could affect R, calculations at small separation. The radius of curvature was studied as a function of shock strength to look for evidence of ripples on the shock surface, though no correlation was found.
Thesis: S.B., Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences, 2006.; Thesis: S.B., Massachusetts Institute of Technology, Department of Physics, 2006.; Cataloged from PDF version of thesis.; Includes bibliographical references (pages 36-37).
2006-01-01T00:00:00ZHeavy nuclides in cosmic radiation.
http://hdl.handle.net/1721.1/112599
Heavy nuclides in cosmic radiation.
Hallock, Geoffrey Gaddis
Massachusetts Institute of Technology. Dept. of Physics. Thesis. 1969. B.S.; Bibliography: leaf 41.
1969-01-01T00:00:00ZCalculation of the axial charge of a heavy nucleon in Lattice QCD
http://hdl.handle.net/1721.1/111890
Calculation of the axial charge of a heavy nucleon in Lattice QCD
Pefkou, Dimitra Anastasia
In this thesis, we aim to calculate the non-renormalized axial charge gA of a heavy nucleon made out of quarks at the physical mass of the strange quark. We present the framework of Lattice QCD which makes the calculation of such observables attainable from first principles. The data used for the estimation of gA were obtained on a 243 x64 hypercubic lattice with lattice spacing a ~ 0.12 fm and pion mass m[pi] = 0.450 GeV. Three different source-sink seperations were used, tsink = [12a, 14a, 16a]. For each timeslice seperation signal we perform a correlated x2 fit and obtain the following values for gA: 0.551, 0.564 and 0.556. The unrenormalized value value for gA is extracted taking the limit as tsink --> [infinity] and is shown to be gA = 0.558. We discuss how the accuracy of this result is compromised by the small number of tsink values, by excited state contamination and by the increase of statistical noise with time.
Thesis: S.B., Massachusetts Institute of Technology, Department of Physics, 2016.; Cataloged from PDF version of thesis.; Includes bibliographical references (pages 55-57).
2016-01-01T00:00:00Z