The Stanford Healthy Neighborhood Discovery Tool: A Computerized Tool to Assess Active Living Environments

submitted by: mbuman
Background: The built environment can influence physical activity, particularly among older populations with impaired mobility. Existing tools to assess environmental features associated with walkability are often cumbersome, require extensive training, and are not readily available for use by community residents. Purpose: This project aimed to develop and evaluate the utility of a computerized, tablet-based participatory tool designed to engage older residents in identifying neighborhood...
Authors: Matthew Buman, Sandra Winter, Jylana Sheats, Eric Hekler, Jennifer Otten, Lauren Grieco, Abby King

MWV Episode 68 - Threading the NEIDL: TWiV Goes Inside a BSL-4

submitted by: MicrobeWorld
Constructed in 2009 in the highly populated South End neighborhood of Boston, Massachusetts, the National Emerging Infectious Diseases Laboratories (NEIDL) facility contains labs that operate at biosafety levels 2, 3 and 4. Due to its location the NEIDL has faced a raft of legal and regulatory hurdles that have prevented BSL-3 and BSL-4 labs from becoming functional. "Threading the NEIDL," is a 1-hour documentary narrated by Vincent Racaniello, PhD, Higgins Professor of Microbiology &...

Aneutronic Fusion Reactor - Eco-friendly Nuclear Energy

submitted by: MFerreiraJr
Conceptually, it has been designed to be the most energy-efficient fusion reactor. Effectively, a clean, safe, dense and environmentally friendly power source to supply the world's energy needs, with no greenhouse gases, no neutron emission, no radioactive waste, no thermal waste, no large land areas, no environmental impact, no interruptions by the weather or time of day, no nuclear meltdowns and no proliferation. It is to be the ultimate energy source, an affordable answer to the world’s...

Topological Soft Materials for All-Optic Low Energy Photonics

submitted by: RASEIBoulder
The existing infrastructure for managing the flow of information along the photonic pathways and in our computers is in most segments based on electrically encoded information and the transport of electric charges using the electric force. This process is limiting the speed of signal propagation and is costly in terms of energy dissipation. The predicted worldwide energy consumption of data centers for 2050 is approaching the electric energy generated in the European Union in 2010! It is...

Approaches to Evaluating and Improving Lithium-Ion Battery Safety

submitted by: RASEIBoulder
As lithium-ion battery technologies mature, the size and energy of these systems continues to increase for emerging applications in transportation, grid storage, military use and aerospace. In fact, broadening the application space for lithium-ion batteries from the consumer electronics industries to these emerging markets increases their size from 1-50 Wh batteries for smart phones and laptops to >50 kWh for electric vehicles (EVs) and MWh scale for utility storage systems. As these...

Making Most of the Absorbed Photon: New Insights into Carrier Multiplication in Semiconductor Nanostructures

submitted by: RASEIBoulder
Carrier multiplication (CM) or multiexciton generation (MEG) is a process whereby absorption of a single photon produces multiple electron-hole pairs (excitons). CM could benefit a number of solar-energy conversion technologies, most notably photocatalysis and photovoltaics. This presentation overviews recent progress in understanding of the CM process in semiconductor nanocrystals, motivated by an outstanding challenge in this field - the lack of capability to quickly discern between...