Diffusion, subdiffusion, and localization of active colloids in random post lattices.

Combining experiments and theory, we address the dynamics of self-propelled particles in crowded environments. We first demonstrate that motile colloids cruising at constant speed through random lattices undergo a smooth transition from diffusive to subdiffusive to localized dynamics upon increasing the obstacle density. We then elucidate the nature of these transitions by performing extensive simulations constructed from a detailed analysis of the colloid-obstacle interactions.

Direct calculation of the critical Casimir force in a binary fluid.

We show that critical Casimir effects can be accessed through direct simulation of a model binary fluid passing through the demixing transition. We work in the semi-grand-canonical ensemble, in slab geometry, in which the Casimir force appears as the excess of the generalized pressure, P_{⊥}-nμ. The excesses of the perpendicular pressure, P_{⊥}, and of nμ, are individually of much larger amplitude.

Neuroscience Training for the 21st Century.

The field of neuroscience is enjoying a rapid expansion in scope, coupled with a remarkable broadening of conceptual approaches, scientific tools, and clinical applications. This growth poses new challenges for academic training programs as they prepare young neuroscientists for a more complex, competitive, and diverse career landscape. Multiple stakeholders, including academia, federal funding agencies, industry, scientific societies, private foundations, and other public and private sector contributors, need to be actively engaged in supporting this broad training effort.

Finite-size scaling of the magnetization probability density for the critical Ising model in slab geometry.

The magnetization probability density in d  =  2 and 3 dimensional Ising models in slab geometry of volume [Formula: see text] is computed through Monte-Carlo simulation at the critical temperature and zero magnetic field. The finite-size scaling of this distribution and its dependence on the system aspect-ratio [Formula: see text]and boundary conditions are discussed. In the limiting case [Formula: see text] of a macroscopically large slab ([Formula: see text]) the distribution is found to scale as a Gaussian function for all tested system sizes and boundary conditions.

A structured PBL tutorial involving small teams for teaching the human nervous system.

Background: The Human Nervous System and Behavior course at Harvard Medical School (HMS) incorporates a hybrid model of problem-based learning. Student preparation for and participation in the tutorial seemed to be insufficient.

Aims: We sought to increase student engagement in tutorial by creating a structured approach, which included assigned roles for students, weekly testing, formal cornerstone presentations, and a weekly self-assessment exercise.