A5085309767- Control Systems and Identification
- Atmospheric aerosols and clouds
- Numerical Methods and Algorithms
- Advanced Control Systems Optimization
- Atmospheric chemistry and aerosols
- Fault Detection and Control Systems
- Digital Filter Design and Implementation
- Neural Networks and Applications
- Icing and De-icing Technologies
- Target Tracking and Data Fusion in Sensor Networks
- Advanced Electrical Measurement Techniques
- Computer Graphics and Visualization Techniques
- Satellite Image Processing and Photogrammetry
- Innovative Microfluidic and Catalytic Techniques Innovation
- Microfluidic and Capillary Electrophoresis Applications
- Advancements in PLL and VCO Technologies
- Scientific Research and Discoveries
- Electrowetting and Microfluidic Technologies
- Microfluidic and Bio-sensing Technologies
- Advanced Vision and Imaging
- Fire effects on ecosystems
- Water Quality Monitoring and Analysis
- Sensor Technology and Measurement Systems
- Structural Health Monitoring Techniques
- Meteorological Phenomena and Simulations
Carnegie Mellon University
2018-2021
University of California, Berkeley
2013-2014
University of Maryland, College Park
2014
Colorado State University
1973-2002
Lawrence Livermore National Laboratory
1975
Clemson University
1973
University of Missouri
1968
University of Wyoming
1964
University of Arizona
1961
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNonlinear Parameter EstimationThomas A. Brubaker and Kelly R. O'KeefeCite this: Anal. Chem. 1979, 51, 13, 1385A–1388APublication Date (Print):November 1, 1979Publication History Published online25 May 2012Published inissue 1 November 1979https://pubs.acs.org/doi/10.1021/ac50049a796https://doi.org/10.1021/ac50049a796research-articleACS PublicationsRequest reuse permissionsArticle Views267Altmetric-Citations6LEARN ABOUT THESE METRICSArticle Views are...
Point-of-care (POC) and disposable biomedical applications demand low-power microfluidic systems with pumping components that provide controlled pressure sources. Unfortunately, external pumps have hindered the implementation of such due to limitations associated portability power requirements. Here, we propose demonstrate a 'finger-powered' integrated system as modular element head for variety advanced applications, including finger-powered on-chip microdroplet generation. By utilizing...
Ability of biomass-burning smoke particles to glaciate clouds increases as the plume undergoes atmospheric dilution and aging.
Abstract Prediction of ice formation in clouds presents one the grand challenges atmospheric sciences. Immersion freezing initiated by ice-nucleating particles (INPs) is dominant pathway primary crystal mixed-phase clouds, where supercooled water droplets and crystals coexist, with important implications for hydrological cycle climate. However, derivation INP number concentrations from an ambient aerosol population cloud-resolving climate models remains highly uncertain. We conducted...
Abstract. Droplet freezing techniques (DFTs) have been used for half a century to measure the concentration of ice-nucleating particles (INPs) in atmosphere and determine their properties understand effects INPs on mixed-phase clouds. The ice nucleation community has recently adopted droplet assays as commonplace experimental approach. These experiments are often limited by contamination that causes nonhomogeneous “pure” water generate droplets heterogeneous temperature regime is being...
Ice nucleation and the resulting cloud glaciation are significant atmospheric processes that affect evolution of clouds their properties including radiative forcing precipitation, yet sources ice nucleants poorly constrained. Heterogeneous caused by ice-nucleating particles (INPs) enables at temperatures above homogeneous freezing regime starts near -35 °C. Biomass burning is a global source highly variable understood INPs. The nature these INPs how they relate to fuel composition its...
A method for designing the read-only memories (ROM's) needed multiplication using logarithms is developed. By defining word length of multiplicand, multiplier, and product as n bits -the rounded m bits, design curves are given that allow various values to be selected a multiplier accuracy. Then table used determine, which combination results in an implementation with least number bits.
Understanding heterogeneous ice nucleation induced by nucleating particles (INPs) is hindered analytical challenges in accurately determining the freezing temperature spectrum, abundance, and physicochemical properties of INPs. Here we evaluate performance a microfluidic device that employs "store create" approach to measure approximately 600 uniformly sized nanoliter water droplets. These droplets are immersed surfactant-free environmentally sustainable squalene oil do not contact polymer...
A three dimensional (3-D) reconstruction algorithm utilizing both linear interpolation and extrapolation was developed for the study of human prostatic cancer. The validated by comparing volumes shapes original to reconstructed objects. Synthetic objects known geometry wax models with characteristic carcinomas were assessed standard planimetry digital interpolation-extrapolation method. Volume multifocality measurements obtained reconstructing excised prostate glands using histologic maps...
A new precision analyzer yields digital readout of probability or density for random waveforms at low audio frequencies. preamplifier-limiter conveniently increases a half-volt slicing interval to 20 v more, and sample-hold circuit permits the slicer work slowly accurately. The use analog computer techniques convenient assembly such instruments from inexpensive commercial plug-in amplifiers decimal counters. Some statistical theory is also presented.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCharacterizing chemical systems with on-line computers and graphics: alkaline phosphatase catalyzed reactionJack W. Frazer, Lester P. Rigdon, Hal R. Brand, Charles L. Pomernacki, Thomas A. BrubakerCite this: Anal. Chem. 1979, 51, 11, 1747–1754Publication Date (Print):September 1, 1979Publication History Published online1 May 2002Published inissue 1 September...
Autonomous fluidic components are critical to the advancement of integrated micro/nanofluidic circuitry for lab-on-a-chip applications, such as point-of-care (POC) molecular diagnostics and on-site chemical detection. Previously, a wide range self-regulating microfluidic components, diodes, have been developed; however, achieving effective functionality at ultra-low Reynolds number (e.g., Re <; 0.05) has remained significant challenge. To overcome this issue, here we introduce single-layer...
Microfluidic components that are capable of autonomous "on-chip" operations at ultra-low Reynolds number (e.g., Re <; 0.2) critical to the advancement integrated fluidic circuitry for chemical and biological applications, including point-of-care (POC) molecular diagnostics on-site detection. Previously, researchers have utilized dynamic resistive elements, such as suspended microbeads rotational microstructures, rectify 0.2 flow; however, systems require hydrodynamic forces return elements...
The University of Arizona's repetitive-computer control unit combines a 10 kc crystal oscillator with inexpensive preset decimal counters and simple digital circuitry to generate accurate timing pulses which perform the following functions:
A study is made of the nonlinear phenomenon limit cycles in digital filters implemented using fixed point arithmetic with product rounding. By investigating individually different types cycles, bounds are derived on coefficients for second-order direct and canonic form that more efficient than earner bounds. Then results extended to connected cascade.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLinear Parameter EstimationThomas A. Brubaker, Rex Tracy, and Charles L. PomernackiCite this: Anal. Chem. 1978, 50, 11, 1017A–1024APublication Date (Print):September 1, 1978Publication History Published online25 May 2012Published inissue 1 September 1978https://pubs.acs.org/doi/10.1021/ac50033a797https://doi.org/10.1021/ac50033a797research-articleACS PublicationsRequest reuse permissionsArticle Views40Altmetric-Citations6LEARN ABOUT THESE...
Abstract. Droplet freezing techniques (DFTs) have been used for half a century to measure the concentration of ice nucleating particles (INP) in atmosphere and determine their properties understand effects INPs on mixed phase clouds. The nucleation community has recently adopted droplet assays as commonplace experimental approach. These experiments are often plagued by contamination that causes non-homogeneous pure water generate droplets heterogeneous temperature regime is being measured....
The synthesis of infinite memory digital filters for the operations smoothing, filtering, prediction and differentiation is described. In design, constraints are developed using a polynomial approximation to signal. noise then minimized subject method Lagrangian multipliers.
The design of nonrecursive and recursive digital filters using linear least squares or minimum variance is described. This method requires a model, since polynomial approximations are widely used in laboratory automation, state model first utilized. Then an exact scalar signal employed that results completely time-varying filter. For both models, the leads to Kalman operation for noise reduction demonstrated simulated data, forms compared. peak separation data obtained from mass...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLinear parameter estimationThomas A. Brubaker, Rex Tracy, and Charles L. PomernackiCite this: Anal. Chem. 1978, 50, 11, 1017A–1021APublication Date (Print):September 1, 1978Publication History Published online21 September 2008Published inissue 1 1978https://pubs.acs.org/doi/10.1021/ac50033a009https://doi.org/10.1021/ac50033a009research-articleACS PublicationsRequest reuse permissionsArticle Views25Altmetric-Citations1LEARN ABOUT THESE...
Estimation of lateral and rotational cloud displacement from satellite images is introduced based on various degrees image abstraction. By using the luminance information, maximum inger product surface two serves as a estimator. The peak detectability can be improved by prefiltering with non-causal inverse filter. If fit to bivariate normal distribution, motion rotation estimated tracing ellipses equal density. Finally, contour clouds Fourier transformed. resulting coefficients reveal...
An analysis of the Fourier transform for a truncated cosine waveform is given that illustrates dependence on phase as period becomes large with respect to record length. The effects sampling are then discussed and illustrated.