Browsing Department of Physics by Title
Now showing items 544563 of 1719

Genetic noise in the cyanobacterial circadian oscillator
(Massachusetts Institute of Technology, 2005)Clocks are generally considered as quintessential examples of accurate and precise devices. Biological clocks however, are continually subjected to intracellular and extracellular fluctuations that might reduce the fidelity ... 
Geometric and elastic properties and mechanical phase separation phenomena in selfassembling mesoscopic helical springs
(Massachusetts Institute of Technology, 2003)Helical ribbons with pitch angles of either 11⁰ or 54⁰ selfassemble in a wide variety of quaternary surfactantphospholipid/fatty acidsterolwater systems. In all of the systems studied, the thermodynamically stable state ... 
Geometrically frustrated quantum magnets
(Massachusetts Institute of Technology, 2004)(cont.) more general lessons on frustrated quantum magnetism. At the end, we demonstrate some new mathematical tools on two other frustrated twodimensional systems, and summarize our conclusions, with an outlook to remaining ... 
Giant vesicles compressed by actin polymerization
(Massachusetts Institute of Technology, 2004)Actin polymerization plays a critical role in generating propulsive force to drive many types of cell motility. The discovery of actin based motility of the bacterial pathogen Listeria monocytogenes has lead to clearer ... 
Global momentum confinement times in Alcator CMod H and I regime plasmas
(Massachusetts Institute of Technology, 2014)Using a spatiallyresolving xray spectrometer system, the toroidal rotation velocity in Alcator CMod plasmas is measured and analyzed. At the LH and LI transition, there is a cocurrent movement in the toroidal rotation ... 
Global simulations of heatfluxdriven buoyancy and magnetothermal instabilities, and their astrophysical implications
(Massachusetts Institute of Technology, 2016)In this thesis, we investigate the convective instabilities induced by anisotropic conduction in a rapidly conducting plasma. We simulate the magnetothermal instability (MTI), and the heatfluxdriven buoyancy instability ... 
The globular cluster luminosity functions of brightest cluster galaxies
(Massachusetts Institute of Technology, 1997) 
Gravitation and phase transitions in the early universe
(Massachusetts Institute of Technology, 1982) 
The gravitational field in a fluid sphere of uniform invariant density according, to the theory of relativity ; Note on de Sitter ̕Universe ; Note on the theory of pulsating stars
(Massachusetts Institute of Technology, 1927) 
Gravitational influences on magnetic field structure in accretion disks
(Massachusetts Institute of Technology, 2010)Black holes and compact objects are often surrounded by structures known as accretion disks which consist of ionized plasma. Due to the immense forces present in the disk, interesting and complex magnetic field structures ... 
Gravitational lens B0957+561 : a study at radio wavelengths
(Massachusetts Institute of Technology, 1997) 
Gravitational Lensing and Telescope Aberrations
(Massachusetts Institute of Technology, 2014)This is a work in three parts, each of which addresses challenges to weak gravitational lensing flexion measurements. Part one is a derivation and analysis of the aberration shapes and patterns imparted onto images by ... 
Gravitational lensing as a probe of dark matter, the distance scale, and gravitational waves in the universe
(Massachusetts Institute of Technology, 1997) 
Gravitational lensing of quasars by edgeon spiral galaxies
(Massachusetts Institute of Technology, 2007)In this thesis, I studied the lensed quasar CX22013201, which is lensed by an edgeon spiral galaxy. The unusually high tilt of the spiral galaxy provides us with a rare opportunity for mass modeling. In addition, the ... 
Gravitationally lensed image simulations for the study of the substructure in galaxy clusters
(Massachusetts Institute of Technology, 2005)As gravitational lensing is susceptible to all gravitating matterboth baryonic and darkit provides a potentially clean way to study the mass distribution of galaxy clusters. We are particularly interested in the substructure ... 
Gravitomagnetic effects in compact binary systems : a study of spinenhanced orbits around Kerr black holes
(Massachusetts Institute of Technology, 2004)An important subject in current gravity research concerns the evolution of compact binary systems in which both members spin, particularly in the extreme mass ratio limit. Previous research has suggested that the effect ... 
Gravity wave signals from relativistic calculations of binary neutron star coalescence
(Massachusetts Institute of Technology, 2001)This thesis describes the design, testing, and implementation of a Lagrangian, postNewtonian, smoothed particle hydrodynamics code used to study the gravitational wave signature produced by coalescing neutron star binary ... 
Green's function analysis of bunched charged particle beams
(Massachusetts Institute of Technology, 2002)In this thesis, we analyze the dynamics and equilibrium of bunched charged particle beams in the presence of perfectly conducting walls using a Green's function technique. Exact selfconsistent electric and magnetic fields ... 
The ground state and angular distributions of Ag18ÌŠ
(Massachusetts Institute of Technology, 1965) 
The ground state of the spin1/2 kagomé lattice antiferromagnet : neutron scattering studies of the zincparatacamite mineral family
(Massachusetts Institute of Technology, 2009)The magnetic properties of the geometrically frustrated quantum magnets clinoatacamite, Cu2(OH)3Cl, and herbertsmithite, ZnCu3(OH)6Cl2, are studied by means of neutron scattering measurements as well as specific heat, ...