Jae H Choi

US Patent:

7399359, Jul 15, 2008

Filed:

Sep 29, 2004

Appl. No.:

10/953312

Inventors:

James S. Im - New York NY, US
Jae Beom Choi - Palisades Park NJ, US

Assignee:

The Trustees of Columbia University in theCity of New York - New York NY

International Classification:

H01L 21/00
H01L 21/31

US Classification:

117107, 438149, 438795, 257E21582

Abstract:

Method and system for generating a metal thin film with a uniform crystalline orientation and a controlled crystalline microstructure are provided. For example, a metal layer is irradicated with a pulsed laser to completely melt the film throughout its entire thickness. The metal layer can then resolidify to form grains with a substantially uniform orientation. The resolidified metal layer can be irradiated with a sequential lateral solidification technique to modify the crystalline microstructure (e. g. , create larger grains, single-crystal regions, grain boundary controlled microstructures, etc. ) The metal layer can be irradiated by patterning a beam using a mask which includes a first region capable of attenuating the pulsed laser and a second region allowing complete irradiation of sections of the thin film being impinged by the masked laser beam. An inverse dot-patterned mask can be used, the microstructure that may have substantially the same as the geometric pattern as that of the dots of the mask.

US Patent:

20120150523, Jun 14, 2012

Filed:

Feb 23, 2012

Appl. No.:

13/403594

Inventors:

Jae Young Choi - Atlanta GA, US
Madhavan Swaminathan - Marietta GA, US

Assignee:

GEORGIA TECH RESEARCH CORPORATION - Atlanta GA

International Classification:

G06F 17/50

US Classification:

703 14

Abstract:

In a method of simulating electrical characteristics of a circuit board having a plurality of features, the plurality of features is projected onto a planar construct. A Delaunay triangulation routine for generating a triangular mesh that corresponds to the single planar construct is executed on the digital computer. A routine that generates a Voronoi diagram corresponding to the triangular mesh. An equivalent circuit for each triangle is determined. The equivalent circuit includes exactly three sub-circuits that couple a vertex within the triangle to a vertex within an adjacent triangle and exactly one sub-circuit that couples the vertex within the triangle to a reference plane. A routine solves, for each triangle, an equation describing an electrical characteristic value based on the equivalent circuit corresponding to the triangle. A routine for generating a human-perceptible indication of the electrical characteristic value for each triangle is executed on the digital computer.

US Patent:

20190298919, Oct 3, 2019

Filed:

Mar 29, 2019

Appl. No.:

16/369217

Inventors:

John Pile-Spellman - Pelham NY, US
Jae H. Choi - Mineola NY, US

International Classification:

A61M 5/172

Abstract:

This application describes a method and device for safely, effectively, perfusing distal to occluded arteries, based on diagnostic information from the catheter-perfusion-system based on sensors, effectors, controllers and algorithms included, with particular attention to the specific characteristics of the tissue and the fluid. Key actionable physiological values for the tissue can be calculated and derived. They include the auto-regulatory curve, with Upper and Lower limits of Auto regulation, vascular reserve, and collateral flow reserve and as auto-regulation exhaustion.

US Patent:

20170173247, Jun 22, 2017

Filed:

Dec 21, 2016

Appl. No.:

15/386219

Inventors:

- Pelham NY, US
Jae H. Choi - Mineola NY, US

International Classification:

A61M 1/36
A61M 1/16
A61M 1/32

Abstract:

A method and system for infusing medical liquid with gasses, the system comprising a gas source, a vacuum pump, a temperature-controlled container including a fluid reservoir coupled to the gas source and the vacuum pump, a heating and cooling system, and a sonicator, and a controller configured to de-gas a liquid in the fluid reservoir by activating the vacuum pump, re-gas the liquid in the fluid reservoir by releasing gas from the gas source to the fluid reservoir via a first fluid line, and deliver the re-gassed liquid from the fluid reservoir to a catheter via a second fluid line.

US Patent:

20160206816, Jul 21, 2016

Filed:

Jan 15, 2016

Appl. No.:

14/996370

Inventors:

- Pelham NY, US
Jae H. Choi - Mineola NY, US
Erwin Lin - Boston MA, US

International Classification:

A61M 5/172
A61M 5/168
G06F 19/00

Abstract:

The present application provides systems that include a controller, and an insertion device with at least one temperatures sensor thereon and a pump coupled to the controller. The insertion device provides temperature measurement(s) at/of a subject's organ to the controller and the controller varies an infusate flow rate to induce temperature changes in at least a portion of the subject's organ and stores the temperature measurements during perfusion induced temperature changes on a memory device. The controller may estimate at least one hemodynamic characteristic of at least a portion of the subject's organ based on the temperature measurements obtained during perfusion induced temperature changes.