Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 690 for “"time-resolved"”.
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Computational time-resolved imaging
… not exploited. This thesis explores the use of time-varying optical illumination and time-resolved sensing along with signal modeling and computational reconstruction. Its purpose is to create new imaging modalities, and to demonstrate high-quality imaging in cases in which traditional …
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Sampling time-resolved phenomena
Broadly speaking, time-resolved phenomena refers to three dimensional capture of a scene based on the time-of-flight principle. Since speed and and time are proportional quantities, knowing time-of-flight allows one to estimate distances. This time-of-flight may be attributed to a pulse of light or …
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Picosecond Time-Resolved Studies of IVR: Theory and Applications of Time-Resolved Fluorescence Depletion
Time resolved fluorescence depletion (TRFD), a new technique for the study of intramolecular vibrational redistribution, is described. Picosecond time resolution is obtained through the application of picosecond laser pump-probe techniques. A time dependent perturbation theory based description of …
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Time Resolved Light Sheet Microscopy
… to new methods of prevention and treatment. Time-correlated single photon counting fluorescence lifetime imaging microscopy is just one of the tools used to carry out this line of research. Here we demonstrate a direct interaction between two proteins involved in gene regulation and …
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Time-Resolved Studies of Aryl Carbenes
Picosecond transient absorption spectroscopy (using a Nd:YAG laser with 355 nm excitation and 440 nm to 640 nm probe) was used to study three aryl carbenes generated by photolysis of their parent diazo compounds in fluid solution. Irradiation of 9-diazofluorene generates a transient with an …
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Time-Resolved THz Magnetospectroscopy: Techniques and Applications
… detection, which decreases acquisition time and has enabled some of the first time-resolved measurements of carrier relaxation via cyclotron resonance experiments in bulk Si. In these measurements we observe directly the magnetic field dependence of the carrier relaxation time, which …
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Single atom imaging with time-resolved electron microscopy
… (STEM) have opened up new possibilities for time-resolved imaging at the atomic scale. However, rapid imaging of single atom dynamics brings with it a new set of challenges, particularly regarding noise and the interaction between the electron beam and the specimen. This thesis develops a set …
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Femtosecond time-resolved spectroscopy of organic molecular crystals
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1988.
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Probing cardiac calcium regulation using time-resolved optical spectroscopy.
… using optical spectroscopy. We have used time-resolved fluorescence resonance energy transfer (TRFRET) to determine the binding and distance distribution between the donor-labeled SERCA and acceptor-labeled SERCA-bound PLB in artificial membranes. Results show that PLB binds to SERCA with …
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Developing Time-Resolved Synchrotron Infrared Spectroscopy for Spectroelectrochemical Measurements
… synchrotron infrared radiation (SIR) and time-resolved FTIR to study the kinetics of electrochemical reactions on second to millisecond scale with high chemical sensitivity. It will cover development of spectroelectrochemical cells and procedures compatible with the mid-IR beamline at the …
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Development of new devices for time-resolved Raman spectroelectrochemistry
… lleva por título “Development of new devices for time-resolved Raman spectroelectrochemistry” ha sido realizada en el área de Química Analítica de la Universidad de Burgos y dirigida por los doctores Álvaro Colina Santamaría y Mª Aránzazu Heras Vidaurre. En este trabajo se han desarrollado nuevas …
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Bubbles and crystals: time-resolved sonoluminescence, sonocrystallization, and sonofragmentation
… Unfortunately, these experiments divulge only time-averaged information, whereas the evolution of the conditions created during the collapse of a single bubble has been largely unexplored and the few reports concerning the time evolution of collapsing bubbles are conflicting and problematic. …
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Investigations of intramolecular dynamics by picosecond time-resolved spectroscopy
… redistribution (IVR) is studied by picosecond time resolved fluorescence depletion (TRFD), a technique which directly measures the ultrafast relaxation processes of the initially prepared vibronic level. Fluorescence depletion decays and dispersed fluorescence spectra of 19 vibronic features in …
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Time-Resolved Interactions of Infrared Vibrations and Plasmonic Nanogaps
… plasmonic near-fields across a wide range of timescales, capturing ultrafast vibrational decay and microsecond thermal dissipation within nanoscale metal-molecule junctions. Novel spectroscopy approaches are developed which combine resonant mid-infrared (MIR) vibrational absorption with Raman …
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TIME RESOLVED PROBING OF MAGNETO-ELASTIC EXCITATIONS IN MAGNETIC MATERIALS
… Transient-Grating spectroscopy, and correlative time-resolved optical spectroscopies (time-resolved reflectivity and polarimetry). Via sub-picosecond optical pulses, acoustic and magnetic transients are impulsively generated: their intertwined evolution and decay are monitored via time-resolved …
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Time-Resolved PIV Measurements of Ship Airwakes with Quartering Winds
… facility. Surface oil flow visualization and time-resolved stereoscopic and planar particle image velocimetry (PIV) measurements were made for three crosswise planes and a single centerline streamwise plane. Measurements included various configurations with the bow of the ship model at two …
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Femtosecond time-resolved photoelectron spectroscopy in the extreme ultraviolet region
Eine experimentelle Apparatur für Femtosekunden Pump-Probe-Studien reversibler Prozesse im EUV Bereich wurde aufgebaut. Photoelektronenspektren von Einzelkristallen, Adsorbaten und Gasen wurden gemessen. Die zeitaufgelösten Photoelektronenspektren des Pt(110) Valenzbandes zeigen die ultraschnelle …
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Time-resolved Raman scattering in GaAs multiple quantum well structures
… technique was extended to the picosecond time domain. Inelastic light scattering from the elementary intersubband excitations of an electron-hole plasma reveals both the absolute carrier density and the occupancy of the electronic subbands of a GaAs quantum welL The major result of this …
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Time resolved fluorescence of CdSe nanocrystals using single molecule spectroscopy
… allowing the behavior of individual NCs to be resolved from the blurring effect of averaging over the ensemble. Studies of the excited state lifetime of band edge fluorescence from single NCs reveal multiexponential relaxation dynamics that stem from fluctuations of non-radiative decay rates …
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Time resolved measurements of rotating stall in axial flow compressors
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1988.
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