Now showing items 21-30 of 11865
Temperature-dependent optical properties of titanium nitride
The refractory metal titanium nitride is promising for high-temperature nanophotonic and plasmonic applications, but its optical properties have not been studied at temperatures exceeding 400 °C. Here, we perform in-situ ...
Simultaneous dual-gas QEPAS detection based on a fundamental and overtone combined vibration of quartz tuning fork
A dual-gas quartz-enhanced photoacoustic spectroscopy (QEPAS) sensor system based on a frequency division multiplexing technique of a quartz tuning fork (QTF) was developed and experimentally demonstrated. Two beams from ...
Managing the U.S.-Mexico Border: Human Security and Technology
This paper examines the current U.S.-Mexico border management system, analyzing the factors and actors that have shaped the discourse about the border and its physical and technological development. The paper points out ...
Enhanced MRI relaxivity of Gd3+-based contrast agents geometrically confined within porous nanoconstructs
Gadolinium chelates, which are currently approved for clinical MRI use, provide relaxivities well below their theoretical limit, and they also lack tissue specificity. Recently, the geometrical confinement of Gd3+-based ...
Tales from the crypt: a parasitoid manipulates the behaviour of its parasite host
There are many examples of apparent manipulation of host phenotype by parasites, yet few examples of hypermanipulation—where a phenotype-manipulating parasite is itself manipulated by a parasite. Moreover, few studies ...