{"id":{"repo_id":"penn","oai_identifier":"oai:repository.upenn.edu:20.500.14332/46011"},"canonical_url":"https://search.dev.ndltd.org/etd/penn/oai:repository.upenn.edu:20.500.14332/46011","repository":{"repo_id":"penn","name":"University of Pennsylvania","base_url":"https://repository.upenn.edu/server/oai/request"},"display":{"title":"Multiple Light Scattering from Isotropic and Anosotropic Turbid Media","abstract":"The Brownian motion of particles in a fluid is a problem with spectacular historical roots [1, 2] and continues to provide us with intriguing new physics. Recently there has been resurging interest in the first steps of these motions [3, 4, 5, 6, 7, 8]. This is largely a result of new experimental probes, such as Diffusing-Wave Spectroscopy (DWS) [7, 9, 10, 11], that enable us to measure particle displacements down to 1Å or even smaller, and thereby offer the possibility to quantitatively test hydrodynamic theories [4, 6] of nondiffusive particle motion, especially in the first random walk step. In the first experiment we present here, we use Diffusing-Wave Interferometry (DWI) [12, 13] to resolve the mean square displacement, (∆r2(τ)), of particles in hard-sphere suspensions during the first twenty nanoseconds of their motion. These are the shortest time scales ever probed in the study of Brownian dynamics.","abstract_html":"The Brownian motion of particles in a fluid is a problem with spectacular historical roots [1, 2] and continues to provide us with intriguing new physics. Recently there has been resurging interest in the first steps of these motions [3, 4, 5, 6, 7, 8]. This is largely a result of new experimental probes, such as Diffusing-Wave Spectroscopy (DWS) [7, 9, 10, 11], that enable us to measure particle displacements down to 1Å or even smaller, and thereby offer the possibility to quantitatively test hydrodynamic theories [4, 6] of nondiffusive particle motion, especially in the first random walk step. In the first experiment we present here, we use Diffusing-Wave Interferometry (DWI) [12, 13] to resolve the mean square displacement, (∆r2(τ)), of particles in hard-sphere suspensions during the first twenty nanoseconds of their motion. These are the shortest time scales ever probed in the study of Brownian dynamics.","abstract_has_math":false,"creators":["Kao, Ming Hsu"],"institution":null,"degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1995,"date_issued":"1995","date_published":"1995","updated_at":"2026-07-24T03:46:22Z","subjects":[],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://repository.upenn.edu/handle/20.500.14332/46011","outbound_label":"Repository record","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Kao, Ming Hsu"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2023-05-17T02:38:58.000"]},{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2023-05-23T01:22:38Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2023-05-23T01:22:38Z"]},{"key":"dc:date.issued","label":"Date","values":["1995"]},{"key":"dc:type","label":"Dc Type","values":["Dissertation/Thesis"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://repository.upenn.edu/handle/20.500.14332/46011"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["The Brownian motion of particles in a fluid is a problem with spectacular historical roots [1, 2] and continues to provide us with intriguing new physics. Recently there has been resurging interest in the first steps of these motions [3, 4, 5, 6, 7, 8]. This is largely a result of new experimental probes, such as Diffusing-Wave Spectroscopy (DWS) [7, 9, 10, 11], that enable us to measure particle displacements down to 1Å or even smaller, and thereby offer the possibility to quantitatively test hydrodynamic theories [4, 6] of nondiffusive particle motion, especially in the first random walk step. In the first experiment we present here, we use Diffusing-Wave Interferometry (DWI) [12, 13] to resolve the mean square displacement, (∆r2(τ)), of particles in hard-sphere suspensions during the first twenty nanoseconds of their motion. These are the shortest time scales ever probed in the study of Brownian dynamics."]},{"key":"dc:title","label":"Title","values":["Multiple Light Scattering from Isotropic and Anosotropic Turbid Media"]}]}],"canonical_facts":{"dc:creator":["Kao, Ming Hsu"],"dc:date":["2023-05-17T02:38:58.000"],"dc:date.accessioned":["2023-05-23T01:22:38Z"],"dc:date.available":["2023-05-23T01:22:38Z"],"dc:date.issued":["1995"],"dc:description.abstract":["The Brownian motion of particles in a fluid is a problem with spectacular historical roots [1, 2] and continues to provide us with intriguing new physics. Recently there has been resurging interest in the first steps of these motions [3, 4, 5, 6, 7, 8]. This is largely a result of new experimental probes, such as Diffusing-Wave Spectroscopy (DWS) [7, 9, 10, 11], that enable us to measure particle displacements down to 1Å or even smaller, and thereby offer the possibility to quantitatively test hydrodynamic theories [4, 6] of nondiffusive particle motion, especially in the first random walk step. In the first experiment we present here, we use Diffusing-Wave Interferometry (DWI) [12, 13] to resolve the mean square displacement, (∆r2(τ)), of particles in hard-sphere suspensions during the first twenty nanoseconds of their motion. These are the shortest time scales ever probed in the study of Brownian dynamics."],"dc:identifier.uri":["https://repository.upenn.edu/handle/20.500.14332/46011"],"dc:title":["Multiple Light Scattering from Isotropic and Anosotropic Turbid Media"],"dc:type":["Dissertation/Thesis"]},"updated_at":"2026-07-24T03:46:22Z"}