Advanced Self Powered Systems of Sensors and Technologies Center
Works Published in 2011
Displaying works 21 - 40 of 91 in total
Sorted by most recent date added to the index first, which may not be the same as publication date order.
2011 conference paper
Optimal trajectory planning for a constrained functional electrical stimulation-based human walking
2011 Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2011, 603–607.
Contributors: N. Sharma* & R. Stein*
Event: 2011 33rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society at Boston, MA on August 30 - September 3, 2011
MeSH headings : Algorithms; Electric Stimulation Therapy / methods; Gait Disorders, Neurologic / rehabilitation; Humans; Leg / physiopathology; Muscle Contraction; Muscle, Skeletal / physiopathology; Therapy, Computer-Assisted / methods
TL;DR:
A dynamic model representing FES-elicited walking constrained by an orthosis and a walker and the design of optimal stimulation and force profiles that minimize muscle activations via FES and arm reaction forces from the walker is presented.
(via Semantic Scholar)
Sources: ORCID, Crossref, NC State University Libraries
Added: August 12, 2021
2011 journal article
Asymptotic tracking by a reinforcement learning-based adaptive critic controller
Journal of Control Theory and Applications, 9(3), 400–409.
Contributors: S. Bhasin *, N. Sharma* , P. Patre* & W. Dixon *
TL;DR:
A continuous-time AC controller is developed that yields asymptotic tracking of a class of uncertain nonlinear systems with bounded disturbances that approximates the plant dynamics and generates appropriate control actions.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
16. Peace, Justice and Strong Institutions
(OpenAlex)
Source: ORCID
Added: August 12, 2021
2011 journal article
A novel modulation strategy to increase stimulation duration in neuromuscular electrical stimulation
Muscle and Nerve, 44(3), 382–387.
Contributors: R. Downey *, M. Bellman*, N. Sharma* , Q. Wang *, C. Gregory* & W. Dixon *
author keywords: amplitude modulation; frequency modulation; functional electrical stimulation; muscle fatigue; neuromuscular electrical stimulation
MeSH headings : Adult; Electric Stimulation; Electric Stimulation Therapy / methods; Feedback, Physiological / physiology; Female; Humans; Male; Muscle Contraction / physiology; Muscle Fatigue / physiology; Neuromuscular Diseases / physiopathology; Neuromuscular Diseases / therapy; Quadriceps Muscle / physiopathology; Task Performance and Analysis; Time Factors
TL;DR:
Compared with constant‐frequency stimulation, results indicate that using an error‐driven strategy to vary the stimulation frequency during amplitude modulation increases the number of successful contractions during non‐isometric conditions.
(via Semantic Scholar)
citeseerx.ist.psu.edu (repository)
UN Sustainable Development Goal Categories
3. Good Health and Well-being
(OpenAlex)
Source: ORCID
Added: August 12, 2021
2011 conference paper
3D orthogonal woven ramie fiber reinforced polypropylene composites
2011 International Symposium on Sustainable Composites (ISSC) 4th China-Japan Joint Seminar on Green Composites.
Source: NC State University Libraries
Added: March 8, 2021
2011 journal article
Sharp burnout failure observed in high current-carrying double-walled carbon nanotube fibers
Nanotechnology, 23(1), 015703.
TL;DR:
It is found that the electrical conductivity and maximum current-carrying capability for these DWNT fibers can reach up to 5.9 × 10(5) S m(-1) and over 1 × 10 (5) A cm(-2) in air.
(via Semantic Scholar)
Source: Crossref
Added: December 21, 2020
2011 journal article
Quasi-Molecular Fluorescence from Graphene Oxide
Scientific Reports, 1(1).
TL;DR:
The sharp and structured emission and excitation features suggest that the effective fluorophore size in the GO samples is remarkably well defined, consistent with excited state protonation of the emitting species in acidic media.
(via Semantic Scholar)
Source: Crossref
Added: December 21, 2020
2011 journal article
Direct laser writing of micro-supercapacitors on hydrated graphite oxide films
Nature Nanotechnology, 6(8), 496–500.
TL;DR:
This work demonstrates the scalable fabrication of a new type of all-carbon, monolithic supercapacitor by laser reduction and patterning of graphite oxide films, which show good cyclic stability, and energy storage capacities comparable to existing thin-filmsupercapacitors.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: Crossref
Added: December 21, 2020
2011 journal article
Optical Bifunctionality of Europium-Complexed Luminescent Graphene Nanosheets
Nano Letters, 11(12), 5227–5233.
author keywords: Graphene; europium; photoluminescence; time-resolved; quenching
MeSH headings : Europium / chemistry; Graphite / chemistry; Luminescence; Luminescent Agents / chemistry; Nanostructures / chemistry; Oxygen / chemistry
TL;DR:
Dual functionality of this graphene is demonstrated by the quenching of luminescence of Rhodamine-B while displaying its own hypersensitive red emission and the decay lifetime observed through the time-resolved spectroscopy confirms its potential for applications in biosensing as well as optoelectronics.
(via Semantic Scholar)
Source: Crossref
Added: December 21, 2020
2011 journal article
Engineered Graphite Oxide Materials for Application in Water Purification
ACS Applied Materials & Interfaces, 3(6), 1821–1826.
author keywords: water purification; graphite oxide; mercury removal; diazonium chemistry; Rhodamine B; sand coating
MeSH headings : Graphite / chemistry; Oxides / chemistry; Water Purification / methods
TL;DR:
"Core-shell" adsorbent granules, readily useable in filtration columns, are synthesized by assembling aqueous GO over sand granules and the nanostructured GO-coated sand retains at least 5-fold higher concentration of heavy metal and organic dye than pure sand.
(via Semantic Scholar)
Source: Crossref
Added: December 21, 2020
2011 journal article
Electronic Textiles: Atomic Layer Deposition of Conductive Coatings on Cotton, Paper, and Synthetic Fibers: Conductivity Analysis and Functional Chemical Sensing Using “All-Fiber” Capacitors (Adv. Funct. Mater. 11/2011)
Advanced Functional Materials, 21(11), 1948–1948.
Source: Crossref
Added: November 14, 2020
2011 journal article
Can peroxygenase and microperoxidase substitute cytochrome P450 in biosensors
Bioanalytical Reviews, 3(2-4), 67–94.
TL;DR:
Biosensors which indicate 4-nitrophenol, aniline, naphthalene and p-aminophenol based on the peroxide-dependent substrate conversion by electrode-immobilised MP and AaeAPO are presented.
(via Semantic Scholar)
Sources: Crossref, NC State University Libraries
Added: October 30, 2020
2011 journal article
Measurements of generation-recombination effect by low-frequency phase-noise technique in AlGaN/GaN MOSHFETs
Physica Status Solidi (c), 8(5), 1539–1543.
author keywords: low-frequency noise; GaN MOSHFET; generation-recombination; gate dielectric
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Sources: Crossref, NC State University Libraries
Added: September 6, 2020
2011 journal article
Fiber Containment for Improved Laboratory Handling and Uniform Nanocoating of Milligram Quantities of Carbon Nanotubes by Atomic Layer Deposition
Langmuir, 27(23), 14497–14507.
MeSH headings : Aluminum Oxide / chemistry; Laboratories; Nanostructures / chemistry; Nanotechnology / methods; Nanotubes, Carbon / chemistry; Particle Size; Porosity; Specimen Handling; Surface Properties
TL;DR:
Novel fiber containment methods to improve the handling of carbon nanotube (CNT) powders in the laboratory while simultaneously allowing highly uniform and controlled atomic layer deposition (ALD) coatings on the nanotubes, down to less than 4 nm on some CNT materials are explored.
(via Semantic Scholar)
Source: Crossref
Added: August 28, 2020
2011 journal article
Light-Weighting Design of Eco-Power Automobile Chassis Made from Green Composite and its Topology Optimization in FEA
Advanced Materials Research, 341-342, 183–188.
author keywords: Green composite; ramie; Polypropylene; chassis; simulation; optimization
UN Sustainable Development Goal Categories
15. Life on Land
(OpenAlex)
Sources: Crossref, NC State University Libraries
Added: September 15, 2019
2011 journal article
Stability of Uni- and Multillamellar Spherical Vesicles
ChemPhysChem, 13(1), 314–322.
author keywords: osmotic stress; phospholipids; self-assembly; thermodynamics; vesicles
MeSH headings : Osmotic Pressure; Phospholipids / chemistry; Thermodynamics; Unilamellar Liposomes / chemistry
TL;DR:
These energy diagrams describe the ranges of core radius and number of lamellae that result in the formation of stable vesicle under specific conditions, thus providing prescriptions for the design of vesicles tailored for specific properties, including stability, cargo capacity, and resistance to deformation by osmotic stress.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: Crossref
Added: June 15, 2019
2011 chapter
Intracardiac Forward-Looking Ultrasound Imaging Catheters Using Capacitive Micromachined Ultrasonic Transducers
In Acoustical Imaging (pp. 203–210).
TL;DR:
Forward-viewing ultrasound imaging catheters based on two types of transducer arrays using the capacitive micromachined ultrasonic transducing technology are developed, demonstrating ex-vivo images of the left atrial appendage in an isolated Langendorff-perfused rabbit heart model and in-viva images of heart through the open chest in a porcine animal model.
(via Semantic Scholar)
Sources: Crossref, NC State University Libraries
Added: March 24, 2019
2011 conference paper
Regulating energy delivery during intracardiac radiofrequency ablation using thermal strain imaging
2011 IEEE International Ultrasonics Symposium. Presented at the 2011 IEEE International Ultrasonics Symposium (IUS).
Event: 2011 IEEE International Ultrasonics Symposium (IUS)
TL;DR:
Temperature validation for this method in-vivo using an integrated intracardiac echocardiography (ICE) probe is presented and preliminary results on thermal strain imaging using a cMUT array integrated into the ICE probe are presented.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Sources: Crossref, NC State University Libraries
Added: March 24, 2019
2011 conference paper
Miniaturized, wearable, ultrasound probe for on-demand ultrasound screening
2011 IEEE International Ultrasonics Symposium. Presented at the 2011 IEEE International Ultrasonics Symposium (IUS).
Event: 2011 IEEE International Ultrasonics Symposium (IUS)
author keywords: low profile; wearable; portable; CMUT; ultrasound; capacitive micromachined ultrasonic transducer; real-time
TL;DR:
A low profile, wearable ultrasound probe that can be taped onto the patient's body for periodic or constant monitoring of organ functions and provided with comparable image quality to that of the commercial probe.
(via Semantic Scholar)
Sources: Crossref, NC State University Libraries
Added: March 24, 2019
2011 conference paper
Interdigitated annular CMUT arrays for ultrasound assisted delivery of fluorescent contrast agents
2011 IEEE International Ultrasonics Symposium. Presented at the 2011 IEEE International Ultrasonics Symposium (IUS).
Event: 2011 IEEE International Ultrasonics Symposium (IUS)
TL;DR:
A circularly symmetric interdigitated capacitive micromachined ultrasonic transducer is investigated for improved delivery of fluorescent contrast agents to be imaged by a miniature dual axis confocal microscope for improved in vivo imaging.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Sources: Crossref, NC State University Libraries
Added: March 24, 2019
2011 conference paper
Comparison of conventional and collapse-mode CMUT in 1-D array configuration
2011 IEEE International Ultrasonics Symposium. Presented at the 2011 IEEE International Ultrasonics Symposium (IUS).
Event: 2011 IEEE International Ultrasonics Symposium (IUS)
author keywords: CMUT; Collapse-mode; LOCOS; MEMS
Sources: Crossref, NC State University Libraries
Added: March 24, 2019
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