We show how extrinsic chirality, i.e. the optical activity of achiral media exhibited at oblique light incidence, can be achieved in plasmonic nanorings by symmetry breaking. We demonstrate that even a small, 5% offset of an inner hole of a 190 nm gold ring results in a measurable circular dichroism signal in the near-infrared region. By using computer simulations, we show that optical activity...

How did I find myself leading family-centered rounds a while ago in the NICU, yet unable to actually see any of my team members, not to mention my patient’s parents sitting just several feet away? I looked up while listening to a summary of the infant’s overnight events, and suddenly it hit me, something was amiss. My entire team was hidden, our views obstructed, from each other and the patient...

This paper presents lessons learned during the development of NASA's Systems Test and Operations Language (STOL) Intelligent Tutoring System (ITS), being developed at NASA Goddard Space Flight Center with support by Carlow Associates Incorporated and Computer Sciences Corporation. The purpose of the intelligent tutor is to train STOL users by adapting tutoring based on inferred student strength...

volume and composition. It is published 12 times a year (monthly) by the American Physiological Society, 9650 relating to the kidney, urinary tract, and their respective cells and vasculature, as well as to the control of body fluid publishes original manuscripts on a broad range of subjects

Tryptophan has been widely used as a probe of protein environment and dynamics. Proper interpretation of the experimental results requires a detailed understanding of tryptophyl photoprocesses, so much effort has been made to understand the fluorescence decay of zwitterionic tryptophan. For a review of these efforts, see ref. [l] . It is now well established that the fluorescence decay of trypt...

A microbiologist and pathologist, who was engaged in research on African Tick-borne Relapsing Fever, Joseph Everett Dutton (Fig. 1), became a victim of this disease. He was born on 9th of September 1874 in Higher Bebington, Cheshire, as the fifth son of the chemist John Dutton, was educated from 1888 to 1892 in the King’s School of Chester, and entered the Liverpool Medical School and the Royal...

A numerical analysis of surface plasmon dispersion, propagation, and localization on smooth lossy films is presented. Particular attention is given to determining wavelength-dependent behavior of thin Ag slab waveguides embedded in a symmetric SiO2 environment. Rather than considering Ag as a damped free electron gas, the metal is defined by the experimentally determined optical constants of Jo...