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Displaying 5701 - 5725 of 74061

High-Resolution Biochemical Activity Measurements with Commercial Transistors

September 1, 2020
Author(s)
Seulki Cho, Son T. Le, Curt A. Richter, Arvind Balijepalli
We demonstrate that single-gated, commercially-sourced, field-effect transistors (FETs) operated with a lock- in amplifier (LIA) under closed-loop control can achieve an average pH resolution of 9x10^-4. This performance represents an 8-fold improvement

Method development in interaction polymer chromatography

September 1, 2020
Author(s)
Andre M. Striegel
Interaction polymer chromatography (IPC) is an umbrella term covering a large variety of primarily enthalpically-dominated macromolecular separation methods. These include temperature- gradient interaction chromatography, interactive gradient polymer

Online VM Auto-Scaling Algorithms for Application Hosting in a Cloud

September 1, 2020
Author(s)
Yang Guo, Alexander Stolyar, Anwar Walid
We consider the auto-scaling problem for application hosting in a cloud, where applications are elastic and the number of requests changes over time. The application requests are serviced by Virtual Machines (VMs), which reside on Physical Machines (PMs)

Simulation of controls for reducing aerosol exposure in educational spaces using FaTIMA

September 1, 2020
Author(s)
Lisa C. Ng, Dustin G. Poppendieck, Brian J. Polidoro, William S. Dols, Steven J. Emmerich, Andrew K. Persily
Results from FaTIMA are presented, which is a recently developed, web-based front end to the CONTAM simulation engine, ContamX. We will introduce the model capabilities, user inputs, and results generated. We will then present the use of the tool in

The Next Generation of Current Measurement for Ionization Chambers

September 1, 2020
Author(s)
Ryan P. Fitzgerald, Denis E. Bergeron, Dean G. Jarrett, Neil M. Zimmerman, Carine Michotte, Hansjoerg Scherer, Stephen Giblin, Steven Judge
Re-entrant ionization chambers (ICs) are essential to radionuclide metrology and nuclear medicine for maintaining standards and measuring half-lives. Metrology-quality systems must be precise and stable to 0.1% over many years, and linear from 10^(-14) A

Transparent High-Frequency Ultrasonic Transducer for Photoacoustic Microscopy Application

September 1, 2020
Author(s)
Jeeseong Hwang, Christopher S. Yung, Ruimin Chen, Yun He, Junhui Shi, Lihong Wang, Qifa Zhou
We report the development of an optically transparent high-frequency ultrasonic transducer using lithium niobate single-crystal and indium-tin-oxide electrodes with up to 90 % optical transmission in the visible to near infrared spectrum. The center
Displaying 5701 - 5725 of 74061