Purdue Research Foundation

Other

Hewlett-packard Development Company, L.p.

George Tsu-Chih Chiu

Jeffrey Frederick Rhoads

Nikhil Bajaj

Steven Forrest Son

Ibrahim Emre Gunduz

Allison Kelly Murray

Andrew Burke Sabater

Bumsoo Han

Trevor John Fleck

Jan Philip Allebach

Dennis A Abramsohn

Eric Allen Nauman

Thomas Heinrich Siegmund

Bryan William Boudouris

Yumeng Wu

Yuehwern Yih

Cheng-Lun Chen

Matthew Tyler Short

Mackenzie Tweardy

Robert J Bernhard

Cih Cheng

Keith A Williams

Michael Wadas

Xikang Zhao

Zachary A Siefker

Michael Linnes

YanFu Kuo

Chao-Lung Yang

The present disclosure relates to a novel composite film configured for COsensing, and the method of making and using the novel composite film. The novel composite film comprises a carbon nanotube film and a COabsorbing layer deposited on the carbon nanotube film, wherein the COabsorbing layer comprises a mixture of a branched polyethylenimine, a polyethylene glycol, and poly[1-(4-vinylbenzyl)-3-methylimidazolium tetrafluoroborate] of formula I:

COsensor based on carbon nanotube-functional polymer composite films

The present disclosure relates to a novel method for rapid preparation of three dimensional (3D) spheroids/organoids, and the 3D spheroids/organoids prepared by the novel method.

Methods and materials for rapid preparation of 3D spheroids/organoids

Three-dimensional (3D) printed fluoropolymer-based energetic compositions are made using 3D printing methods. The 3D printed fluoropolymer-based energetic compositions comprise a fluoropolymer and a reactive metal or metal oxide. The total weight percentage of the fluoropolymer and the reactive metal or metal oxide is 70-100% of the 3D printed fluoropolymer-based energetic composition, and the weight percentage of the reactive metal or metal oxide is 5-85 wt % of the total weight of the 3D printed fluoropolymer-based energetic material. The 3D printed fluoropolymer-based energetic material has a thickness of at least 200 &#x3bc;m.

3D printed fluoropolymer-based energetic compositions

This disclosure generally relates to methods and apparatus for 3D printing of highly viscous materials, especially to high amplitude ultrasonic vibration facilitated lower temperature 3D printing of highly viscous materials with a viscosity of at least 1000 Pa&#xb7;s.

Methods and apparatus for 3d printing of highly viscous materials

Multi-well collapsible basket arrays and methods for their use with high throughput culture and histology analysis of spheroids and organoids. Such a collapsible basket array includes a collapsible cellular array structure having multiple cells and connectors that interconnect adjacent pairs of the cells to cause the collapsible cellular array structure to collapse from an expanded configuration to a collapsed configuration in which the connectors are partially wrapped around perimeters or circumferences of the cells, whereby the collapsible cellular array structure is expandable to acquire an expanded configuration capable of individually aligning the cells thereof with wells of a well plate. The collapsible basket array further includes inserts individually mountable to the cells of the collapsible cellular array structure, with each insert including a permeable basket with pores sized to retain spheroids or organoids within the basket.

Collapsible basket arrays, collapsible cellular arrays therefor, and methods of use

This present disclosure relates to sensors capable of sensing mass, stiffness, and chemical or biological substances. More specifically, this disclosure provides the design and implementation of a piecewise-linear resonator realized via diode- and integrated circuit-based feedback electronics and a quartz crystal resonator. The proposed system is fabricated and characterized, and the creation and selective placement of the bifurcation points of the overall electromechanical system is demonstrated by tuning the circuit gains. The demonstrated circuit operates around at least 1 MHz.

Nonlinear mass sensors based on electronic feedback

A method of detecting a substance, wherein the method includes functionalizing a plurality of sensors, wherein the functionalizing the plurality of sensors comprises depositing a first material using a piezoelectrically actuated pipette system, wherein the first material includes a polymer, a receptor, and a solvent, wherein the solvent comprises dimethylformamide. The method further includes evaporating a solution of the first material wherein a residue after the evaporation comprises a functionalized chemical. Additionally, the method includes introducing a control material to a first set of sensors of the plurality of sensors using the piezoelectrically actuated pipette system. Further, the method includes introducing a test material to a second set of sensors of the plurality of sensors using the piezoelectrically actuated pipette system, wherein the test material comprises an analyte. Moreover the method includes determining a difference between a first resonant frequency shift in the first set of sensors of the plurality of sensors and a second resonant frequency shift in the second set of sensors of the plurality of sensors.

Method of detecting a substance

A device and method for sensing including a sensor having a functional surface layer located to interact with a material to be sensed, the sensor having an output that produces a signal responsive one or more of inertia, stiffness, acceleration, pressure, radiation, chemical compounds, and biological compounds; and further including electronics including: an input coupled to the sensor to receive a first signal therefrom; and a non-linearity provider that applies one or more non-linear operations to the input signal to generate a non-linear second signal.

Nonlinear mass sensors based on electronic feedback and methods of using the same

Control parameters of a printing device are optimized using a process model to reduce a process tone reproduction curve (TRC) error between a process TRC and a desired TRC. Tone-corrected halftone levels for the printing device are generated using a sensor model to reduce a printing device TRC error between a TRC of the printing device and the desired TRC, based on color patches printed by the printing device using the control parameters as have been optimized, as measured by one or more sensors of the printing device.

Tone reproduction curve error reduction

Systems and methods for reducing banding artifact in electrophotographic devices are provided. One such electrophotographic device uses a closed loop controller that receives a feedback signal from an encoder connected to the OPC drum to improve the rotational velocity control of the drum. The encoder provides the rotational position or angular velocity of the drum to the closed loop controller as the feedback signal. Optionally, the electrophotographic device uses a closed loop controller that incorporates a model of the human visual system, such as the human contrast sensitivity function, to help reduce noticeable banding artifacts. The human contrast sensitivity function incorporated into the primary control loop helps filter out low frequency and non-periodic drum rotational velocity fluctuations in producing banding artifacts. The electrophotographic device may also include a repetitive controller in a secondary control loop to help reduce the effect of periodic drum rotational velocity fluctuations in producing banding artifacts. Methods and other systems also are provided.

Systems and methods for reducing banding artifact in electrophotographic devices using drum velocity control

The present invention relates to a vibration absorber in which an absorber end mass is coupled to a primary mass by means of a cantilevered beam, wherein at least a portion of the beam comprises a shape memory alloy (SMA). Preferably, the end mass is coupled to the primary mass with several discrete SMA wires which may be individually heated. When each of the SMA wires is heated above a predetermined temperature, the SMA material undergoes a phase change which results in a change in the stiffness of the SMA wire. Heating of the various wires in various combinations allows the operational frequency of the absorber to be actively tuned. The frequency of the absorber may therefore be tuned to closely match the current vibrational frequency of the primary mass, thereby allowing the absorber to be adaptively tuned to the frequency of the primary mass in a simple and straightforward manner.

Growing community of inventors

West Lafayette, IN, United States of America

George Tsu-Chih Chiu