tag:techtv.mit.edu,:Array/186825220 2008-04-29 11:54:55 -0400 1.961 Lecture Videos <p><strong>1.961 Life at low Reynolds numbers</strong></p><p>Poiseuille flow<br /> The advection-diffusion equation<br /> Stretching the mixing zone: enhancing diffusion via shear</p> 5340 tag:techtv.mit.edu,:Array/186723720 2008-04-29 10:49:26 -0400 1.961 Lecture Videos <p><strong>1.961 Life at low Reynolds numbers</strong></p><p>Many taxis: chemo-, photo-, pH-, magneto-, rheo-, geo-, aero-, thermo-, gyro-taxis. <br /> A computer model of chemotaxis: a sensing random walker with memory<br /> Deriving an advection-diffusion equation for bacteria</p> 5337 tag:techtv.mit.edu,:Array/186469620 2008-04-28 16:20:55 -0400 1.961 Lecture Videos <p><strong>1.961 Life at low Reynolds numbers</strong></p><p>Resistive force theory: exploiting the anisotropy of drag<br /> Optimum shape of flagella in 2D and 3D<br /> A lousy maximum swimming efficiency<br /> The energetic cost of swimming<br /> Low Reynolds number cooperation to swim faster: sperm trains </p> 5554 tag:techtv.mit.edu,:Array/186373440 2008-04-29 10:32:17 -0400 1.961 Lecture Videos <p><strong>1.961 Life at low Reynolds numbers</strong></p><p>Particles crossing streamlines?<br /> Solving hard problems without doing math<br /> The scallop theorem</p> 5249 tag:techtv.mit.edu,:Array/186295660 2008-04-29 12:45:51 -0400 1.961 Lecture Videos <p><strong>1.961 Life at low Reynolds numbers</strong></p><p>Solving the diffusion equation<br /> A fundamental property of diffusion: rapid smearing of fine-scale heterogeneities </p> 5246 tag:techtv.mit.edu,:Array/186249440 2008-04-29 11:48:40 -0400 1.961 Lecture Videos <p><strong>1.961 Life at low Reynolds numbers</strong></p><p>Brownian rotational diffusion<br /> A bacterial random walk: E. coli’s run-and-tumble swimming<br /> Other bacterial swimming modes<br /> Brownian constraints on swimming<br /> The distribution of tumbling angles </p> 5201 tag:techtv.mit.edu,:Array/186190840 2008-04-29 10:57:36 -0400 1.961 Lecture Videos <p><strong>1.961 Life at low Reynolds numbers</strong></p><p>Tumbling intervals: a Poisson process<br />Diffusion of a bacterial population<br />Motility mutants</p> 5193 tag:techtv.mit.edu,:Array/186074040 2008-04-29 12:38:52 -0400 1.961 Lecture Videos <p><strong>1.961 Life at low Reynolds numbers</strong></p><p>The capillary assay: testing what microorganisms like<br /> Diffusion in a pipe<br /> Insect tracheae: limits to respiration<br /> Diffusion of momentum: an analogy<br /> The porosity of eggs and the gas exchange in leaves (handouts only)</p> 5184 tag:techtv.mit.edu,:Array/186000360 2008-04-29 12:32:15 -0400 1.961 Lecture Videos <p><strong>1.961 Life at low Reynolds numbers</strong></p><p> Receptors on cell surfaces: how many do you need?<br /> Other forms of diffusion<br /> Diffusion with drift</p> 5145 tag:techtv.mit.edu,:Array/185902460 2008-04-29 10:16:51 -0400 1.961 Lecture Videos <p><strong>1.961 Life at low Reynolds numbers</strong></p><p> Stokes’ settling speed<br /> Terminal velocity: on non-splashing mice<br /> Sinking and reproduction<br /> Non-spherical particles<br /> The anisotropy of drag: the fundamental principle of swimming at low Re<br /> An optimum shape for swimming<br /> Spines and bristles<br /> Slow-down due to nearby walls and unsteady effects</p> 5143