126 research outputs found
Solvent and temperature effects on fluorescence emission of europium beta - diketonates
Solvent and temperature effects on fluorescent emission of europium-diketonate
Liquid laser cavities
Liquid laser cavities have plenum chambers at the ends of the capillary cell which are terminated in transparent optical flats. By use of these cavities, several new europium chelates and a terbium chelate can provide laser action in solution at room temperature
Laser action from a terbium beta-ketoenolate at room temperature
Laser activity is achieved in a solution of terbium tris at room temperature in a liquid solvent of acetonitrile or p-dioxane. After precipitation, the microcrystals of hydrated tris chelate are filtered, washed in distilled water, and dried. They show no signs of deterioration after storage
A proposal for the coherent propagation studies portion of the 10.6-micrometer laser communications experiment Advanced Technology Satellite-F technical proposal
Coherent propagation study proposal for ATS-F 10.6 micrometer laser communications experimen
An advanced 10.6-micro laser communication experiment
Carbon dioxide laser capability of high data rate intersatellite communicatio
QuakeFlow: A Scalable Machine-learning-based Earthquake Monitoring Workflow with Cloud Computing
Earthquake monitoring workflows are designed to detect earthquake signals and
to determine source characteristics from continuous waveform data. Recent
developments in deep learning seismology have been used to improve tasks within
earthquake monitoring workflows that allow the fast and accurate detection of
up to orders of magnitude more small events than are present in conventional
catalogs. To facilitate the application of machine-learning algorithms to
large-volume seismic records, we developed a cloud-based earthquake monitoring
workflow, QuakeFlow, that applies multiple processing steps to generate
earthquake catalogs from raw seismic data. QuakeFlow uses a deep learning
model, PhaseNet, for picking P/S phases and a machine learning model, GaMMA,
for phase association with approximate earthquake location and magnitude. Each
component in QuakeFlow is containerized, allowing straightforward updates to
the pipeline with new deep learning/machine learning models, as well as the
ability to add new components, such as earthquake relocation algorithms. We
built QuakeFlow in Kubernetes to make it auto-scale for large datasets and to
make it easy to deploy on cloud platforms, which enables large-scale parallel
processing. We used QuakeFlow to process three years of continuous archived
data from Puerto Rico, and found more than a factor of ten more events that
occurred on much the same structures as previously known seismicity. We applied
Quakeflow to monitoring frequent earthquakes in Hawaii and found over an order
of magnitude more events than are in the standard catalog, including many
events that illuminate the deep structure of the magmatic system. We also added
Kafka and Spark streaming to deliver real-time earthquake monitoring results.
QuakeFlow is an effective and efficient approach both for improving realtime
earthquake monitoring and for mining archived seismic data sets
Incorporating Integrating Variables into Steady State Models for Plantwide Control Analysis and Design
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