Ravi T Shankar

US Patent:

7080114, Jul 18, 2006

Filed:

Dec 4, 2001

Appl. No.:

10/004958

Inventors:

Ravi Shankar - Boca Raton FL, US

Assignee:

Florida Atlantic University - Boca Raton FL

International Classification:

G06F 7/52

US Classification:

708620

Abstract:

A high speed scalable multiplier. The high speed scalable multiplier can include a folding multiplier configured to fold multiplicands and multipliers where individual ones of the multiplicands and multipliers exceed a folding threshold. The folding multiplier also can compute a product of the multiplicands and multipliers based on less than all bits forming the multiplicands and multipliers. The high speed scalable multiplier also can include a conventional multiplier and at least one additional folding multiplier, each of the multipliers being individually, selectably activatable.

US Patent:

7873823, Jan 18, 2011

Filed:

Dec 1, 2004

Appl. No.:

11/001207

Inventors:

Ravi Shankar - Boca Raton FL, US

International Classification:

G06F 9/00

US Classification:

713100, 713300, 713320

Abstract:

A large bit width multiplier with multiple copies of a core small bit width multiplier and ROM cells. The present invention provides a power system that trades off processing speed against power dissipation. The present invention reduces power dissipation to about half of the best industry implementation at about half the speed. Its power dissipation is 10% of another industry standard implementation at 1. 5 times the speed. The present invention has a gate count that is about twice the gate count for these implementations.

US Patent:

7956520, Jun 7, 2011

Filed:

Nov 19, 2007

Appl. No.:

12/515761

Inventors:

Ravi Shankar - Raleigh NC, US
Tushar K. Ghosh - Cary NC, US
Richard J. Spontak - Raleigh NC, US

Assignee:

North Carolina State University - Raleigh NC

International Classification:

H01L 41/08

US Classification:

310800

Abstract:

An actuator element formed from an actuator composition is described, along with transducers including the same. The composition comprises: (i) a thermoplastic elastomer copolymer, the copolymer comprising at least one flexible midblock, and at least two glassy or semicrystalline endblocks; and (ii) a liquid modifier that selectively solvates the at least one flexible midblock.

US Patent:

8185182, May 22, 2012

Filed:

Mar 10, 2009

Appl. No.:

12/381242

Inventors:

Ravi Shankar - Boca Raton FL, US

International Classification:

A61B 5/05
A61B 5/00

US Classification:

600347, 600345, 600365

Abstract:

An apparatus and method for measuring the blood glucose level of a diabetic using insulin is noninvasive. The apparatus includes two plethysmographs that sense the blood in two fingers simultaneously. The electrodes in the plethysmographs are immersed in conductive liquids. One liquid has electric conductivity equal to blood. The other liquid is more conductive than blood. Signals from the fingers are compared to signals obtained earlier when glucose levels were known from conventional measurements. An alternative embodiment employs a single plethysmograph with one set of electrodes in a surrounding chamber and a second set of electrodes against the skin surface.

US Patent:

8197416, Jun 12, 2012

Filed:

Aug 21, 2006

Appl. No.:

11/507629

Inventors:

Ravi Shankar - Boca Raton FL, US

International Classification:

A61B 5/02

US Classification:

600492, 600490, 600494, 600482

Abstract:

Apparatus includes at least one of inflatable blood pressure cuffs for encircling a proximal, a distal, and an intermediate portion of a limb. Electrical signals from a pressure transducer on the cuff and from skin contact electrodes on the cuff are generated during pulses from the heart or from externally generated cuff pulses. A signal processing mechanism generates numerical values that are relevant to conditions that may contribute to cardiac malfunction.

US Patent:

20050010598, Jan 13, 2005

Filed:

May 28, 2004

Appl. No.:

10/856252

Inventors:

Ravi Shankar - Boca Raton FL, US

International Classification:

G05B015/02

US Classification:

707104100

Abstract:

A method of concurrent visualization of serial and parallel consequences or communication of a flow input to a process module of a flow process includes the steps of: arranging a plurality of process modules in a system and flow relationship to each other; encapsulating each module within an input/output interface through which module operating requirements and process-specific options may be furnished as inputs to the interface, and parallel and series responses to the inputs may be monitored as outputs of the interface, each input/output interface thereby defining a process action of the module of interest, visually mapping by rows, of selected module interface outputs, of a selectable subset of modules of the flow process, to be visualized, the mapping occurring from a common vertical axis, in response to the process-specific input to the interface, in which a horizontal axis of the mapping comprises a parameter of a serial or parallel consequences of the process-specific input; and visually comparing time dependent simulated outputs of the interfaces of the selected subsets of modules to thereby observe serial and parallel consequences of the process-specific input.

US Patent:

53438671, Sep 6, 1994

Filed:

Jul 12, 1993

Appl. No.:

8/090800

Inventors:

Ravi Shankar - Boca Raton FL

Assignee:

Florida Atlantic University Research Corp. - Boca Raton FL

International Classification:

A61B 502

US Classification:

128668

Abstract:

The present invention relates to a method for detecting the onset of atherosclerosis and for detecting the degree of atherosclerosis. Accordingly, one aspect of the present invention correlates data obtained from arteries having a measured amount of stenosis with actual arterial data (blood volume change vs. cuff pressure) obtained from a patient which is converted into data relating to the patient's arterial peak compliance. Another aspect of the present invention detects the onset and the degree of atherosclerosis by classifying the shape of a curve obtained by relating arterial blood volume change with cuff pressure. Two devices can be used, an electrical impedance plethysmograph and a volume plethysmograph.

US Patent:

52975568, Mar 29, 1994

Filed:

Jul 28, 1993

Appl. No.:

8/098707

Inventors:

Ravi Shankar - Boca Raton FL

Assignee:

Florida Atlantic University Research Corp. - Boca Raton FL

International Classification:

A61B 502

US Classification:

128668

Abstract:

The present invention relates to a method for detecting the onset of atherosclerosis and for detecting the degree of atherosclerosis. Accordingly, one aspect of the present invention correlates data obtained from arteries having a measured amount of stenosis with actual arterial data (blood volume change vs. cuff pressure) obtained from a patient which is converted into data relating to the patient's arterial peak compliance. Another aspect of the present invention detects the onset and the degree of atherosclerosis by classifying the shape of a curve obtained by relating arterial blood volume change with cuff pressure. Two devices can be used, an electrical impedance plethysmograph and a volume plethysmograph.