A5013345212- Color Science and Applications
- Iterative Learning Control Systems
- Digital Media Forensic Detection
- Industrial Vision Systems and Defect Detection
- Nanomaterials and Printing Technologies
- Advanced Steganography and Watermarking Techniques
- Hydraulic and Pneumatic Systems
- Advanced Chemical Sensor Technologies
- Mechatronics Education and Applications
- Analytical Chemistry and Sensors
- Advancements in Photolithography Techniques
- Mechanical and Optical Resonators
- Biosensors and Analytical Detection
- Image Enhancement Techniques
- Advanced Control Systems Optimization
- Additive Manufacturing and 3D Printing Technologies
- Fault Detection and Control Systems
- Force Microscopy Techniques and Applications
- Computer Graphics and Visualization Techniques
- Electron and X-Ray Spectroscopy Techniques
- Electrohydrodynamics and Fluid Dynamics
- Control Systems and Identification
- Gas Sensing Nanomaterials and Sensors
- Advanced MEMS and NEMS Technologies
- Energetic Materials and Combustion
Purdue University West Lafayette
2015-2024
Johns Hopkins University Applied Physics Laboratory
2017-2023
Institute of Electrical and Electronics Engineers
2019-2022
Purdue University System
2020-2022
Nanyang Technological University
2020-2022
Boğaziçi University
2019
Research Organization for Information Science and Technology
2019
Herrick Technology Laboratories (United States)
2004-2018
Pennsylvania State University
2018
Virginia Tech
2018
High-performance robust motion control of single-rod hydraulic actuators with constant unknown inertia load is considered. The two chambers a actuator have different areas, so the dynamic equations describing pressure changes in them cannot be combined into single equation. This complicates controller design since it not only increases system dimension but also brings stability issue added internal dynamics. A discontinuous projection-based adaptive (ARC) constructed. takes account effect...
In this paper, a direct writing method for gallium‐indium alloys is presented. The relationships between nozzle inner diameter, standoff distance, flow rate, and the resulting trace geometry are demonstrated. interaction gallium oxide layer substrate critically important in understanding printing behavior of liquid metal. difference receding advancing contact angles demonstrates that adhesion to surface stronger than wetting by alloy. This further why free‐standing structures such as traces...
This paper gives an overview of the BlueGene/L Supercomputer. is a jointly funded research partnership between IBM and Lawrence Livermore National Laboratory as part United States Department Energy ASCI Advanced Architecture Research Program. Application performance scaling studies have recently been initiated with partners at number academic government institutions, including San Diego Supercomputer Center California Institute Technology. massively parallel system 65,536 nodes based on new...
Blue Gene/Q aims to build a massively parallel high-performance computing system out of power-efficient processor chips, resulting in power-efficient, cost-efficient, and floor-space- efficient systems. Focusing on reliability during design helps with scaling large systems lowers the total cost ownership. This article examines architecture Compute chip, which combines processors, memory, communication functions single chip.
Abstract Although no known asteroid poses a threat to Earth for at least the next century, catalogue of near-Earth asteroids is incomplete objects whose impacts would produce regional devastation 1,2 . Several approaches have been proposed potentially prevent an impact with by deflecting or disrupting 1–3 A test kinetic technology was identified as highest-priority space mission related mitigation 1 NASA’s Double Asteroid Redirection Test (DART) full-scale technology. The mission’s target...
We show that contouring performance can be viewed as a regulation problem in moving task coordinate frame is attached to the desired contour. By transforming machine tool feed drive dynamics this frame, control law designed assign different tangential and normal directions. The transformation also illustrated effect of contour curvature rate action well system frame. resulting consists linear time-varying proportional-plus-derivative (PD) position error feedback time invariant trajectory...
In conventional implementations, resonant chemical and biological sensors exploit chemomechanically-induced frequency shifts, which occur in linear systems, for analyte detection. this letter, an alternative sensing approach, based upon dynamic transitions across saddle-node bifurcations is investigated. This technique not only has the potential to render improved sensor metrics but also eliminate tracking components from final device implementations. The present work details...
Thin and lightweight radiative cooling paints are needed for many weight-sensitive applications. However, it is difficult to achieve high solar reflectance with thin layers. This work develops ultrawhite hBN-acrylic that of 97.9% sky window emissivity 0.83 only 150 μm thickness 0.029 g/cm2 weight, representing significant reductions from previous paints. The refractive index nanoplatelet morphology hBN enable a unique combination Mie scattering-like scattering coefficient Rayleigh strong...
This paper gives an overview of the BlueGene/L Supercomputer. is a jointly funded research partnership between IBM and Lawrence Livermore National Laboratory as part United States Department Energy ASCI Advanced Architecture Research Program. Application performance scaling studies have recently been initiated with partners at number academic government institutions,including San Diego Supercomputer Center California Institute Technology. massively parallel system 65,536 nodes based on new...
Digital images can be captured or generated by a variety of sources including digital cameras, scanners and computer graphics softwares. In many cases it is important to able determine the source image such as for criminal forensic investigation. This paper presents methods distinguishing between an using camera, scanner. The method proposed here based on differences in generation processes used these devices independent content. features residual pattern noise that exist obtained from...
Hummingbirds are nature‘s masters of aerobatic manoeuvres. Previous research shows hummingbirds and insects converged evolutionarily upon similar aerodynamic mechanisms kinematics in hovering. Herein, we use three-dimensional kinematic data to begin test for convergence used escape flight explore the effects body size manoeuvring. We studied four hummingbird species North America including two large (magnificent hummingbird, Eugenes fulgens, 7.8 g blue-throated Lampornis clemenciae, 8.0 g)...
This paper presents a method to achieve high-speed and high-accuracy 3D surface measurement using custom-designed mechanical projector two cameras. We developed computational framework that can absolute shape in sub-pixel accuracy through: 1) capturing precisely phase-shifted fringe patterns by synchronizing the cameras with projector; 2) generating rough disparity map between employing standard stereo-vision texture images encoded statistical patterns; 3) utilizing wrapped phase as...
Abstract Precision livestock farming (PLF) offers a strategic solution to enhance the management capacity of large animal groups, while simultaneously improving profitability, efficiency, and minimizing environmental impacts associated with production systems. Additionally, PLF contributes optimizing ability manage monitor welfare providing solutions global grand challenges posed by growing demand for products ensuring food security. By enabling return “per animal” approach harnessing...
This paper studies the high performance robust motion control of electro-hydraulic servo-systems driven by double-rod hydraulic actuators. The dynamics systems are highly non-linear and system may be subjected to non-smooth discontinuous non-linearities due directional change valve opening, friction overlap. Aside from nature dynamics, servosystems also have large extent model uncertainties. To address these challenging issues, recently proposed adaptive (ARC) is applied a projection based...
In today's digital world securing different forms of content is very important in terms protecting copyright and verifying authenticity. Many techniques have been developed to protect audio, video, documents, images, programs (executable code). One example watermarking audio images. We believe that a similar type protection for printed documents important. The goals our work are securely print trace on low cost consumer printers such as inkjet electrophotographic (laser) printers. will...
This paper describes methods for forensic characterization of physical devices. is important in verifying the trust and authenticity data device that created it. Current identification techniques digital cameras, printers, RF devices are presented. It also shown how these can fit into a general framework, which be generalized use with other
Digital images can be captured or generated by a variety of sources including digital cameras and scanners. In many cases it is important to able determine the source image. This paper presents methods for authenticating that have been acquired using flatbed desktop The method based on pattern noise imaging sensor as fingerprint scanner, similar reported identifying cameras. To identify scanner an image reference estimated each treated unique scanner. An anisotropic local polynomial...
Contrary to popular opinion, the use of paper in our society will not disappear during foreseeable future. In fact, continues grow rather than decline. It is certainly true that as individuals, we may be printing less used to. And role has been transformed from archival record a document convenient and aesthetically appealing graphical user interface. The now intimately linked electronic systems capture, process, transmit, generate, reproduce textual graphic content. Paper can thought an...