David Weitz

Throughput enhancement of parallel step emulsifier devices by shear-free and efficient nozzle clearance

Elad Stolovicki, Roy Ziblat, David Weitz

Step emulsification is an attractive method for production of monodisperse drops. Its main advantage is the ability to parallelize many step emulsifier nozzles to achieve high production rates. However, step emulsification is sensitive to any obstructions at the nozzle exit. At high …

Triggered gelation of microfluidic polymer droplets to identify and isolate viable antigen-speific immune cells

Brendan T. Deveney, Julie Brouchon, John A. Heyman, Yuan Yuan et autres

Enhanced oil recovery with polymer flooding.

Shima Parsa, David Weitz

Chiral Double Emulsions: Breaking Symmetry with Microfluidics

Laura Adams, Thomas E. Kodger, Jiawei Yang, David Weitz

Cooperative Symmetry Breaking from One to Three Dimensions in Multi-Component Double Emulsions

Laura Adams, J. Malcolm Bird, Jaiwei Yang, Thomas Franke et autres

Picoliter droplet-based digital peptide nucleic acid clamp PCR and dielectric sorting for low abundant K-ras mutations

Huidan Zhang, Ralph A. Sperling, Assaf Rotem, Lianfeng Shan et autres

Osmotic pressure: resisting or promoting DNA ejection from phage? Internal capsid-pressure dependence of viral infection

Alex Evilevitch, Meerim Jeembaeva, Sarah K. Koester, Martin Castelnovo et autres

Software algorithms for false alarm reduction in LWIR hyperspectral chemical agent detection

Dimitris G. Manolakis, Joshua Model, M. Rossacci, D. Zhang et autres

The long-wave infrared (LWIR) hyperpectral sensing modality is one that is often used for the problem of detection and identification of chemical warfare agents (CWA) which apply to both military and civilian situations. The inherent nature and complexity of background clutter dictates …

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SDO EVE CCD and thin foil filter characterization and selection

Matthew Triplett, David A. Crotser, T. N. Woods, F. G. Eparvier et autres

The NASA Solar Dynamics Observatory (SDO), scheduled for launch in 2009, incorporates a suite of instruments including the EUV Variability Experiment (EVE). The Multiple EUV Grating Spectrograph (MEGS) channels use concave reflection gratings to image solar spectra onto CCDs that are operated …

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Noninvasive Probing of the Spatial Organization of Polymer Chains in Hydrogels Using Fluorescence Resonance Energy Transfer (FRET)

Hyun Joon Kong, Chan-Joong Kim, Nathaniel Huebsch, David Weitz et autres

Spatial organization of polymer chains upon ionic or covalent cross-linking to form a hydrogel is examined on the molecular scale using a fluorescent resonance energy transfer (FRET) technique. Minimal changes in the conformation in the polymer chains but significant changes of the …

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SDO-EVE multiple EUV grating spectrograph (MEGS) optical design

David A. Crotser, T. N. Woods, F. G. Eparvier, Greg Ucker et autres

The NASA Solar Dynamics Observatory (SDO), scheduled for launch in 2008, incorporates a suite of instruments including the EUV Variability Experiment (EVE). The EVE instrument package contains grating spectrographs used to measure the solar extreme ultraviolet (EUV) irradiance from 0.1 to 105 …

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Architectural trades for an advanced geostationary atmospheric sounding instrument

Michael MacDonald, Edward C. Wack, Michael W. Kelly, Danette P. Ryan-Howard et autres

The process of formulating a remote sensing instrument design from a set of observational requirements involves a series of trade studies during which judgments are made between available design options. The outcome of this process is a system architecture which drives the …

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