A5064383777- Precipitation Measurement and Analysis
- Atmospheric aerosols and clouds
- Meteorological Phenomena and Simulations
- Soil Moisture and Remote Sensing
- Cryospheric studies and observations
- Icing and De-icing Technologies
- Arctic and Antarctic ice dynamics
- Advanced Optical Imaging Technologies
- Analytical Chemistry and Sensors
- Digital Holography and Microscopy
- Atmospheric chemistry and aerosols
- Aeolian processes and effects
- Radar Systems and Signal Processing
- RNA Interference and Gene Delivery
- Advanced biosensing and bioanalysis techniques
- GNSS positioning and interference
- Neuroscience and Neural Engineering
- Smart Materials for Construction
- Tropical and Extratropical Cyclones Research
- Arsenic contamination and mitigation
- Gas Sensing Nanomaterials and Sensors
- Advanced SAR Imaging Techniques
- Radio Wave Propagation Studies
- Optical Coherence Tomography Applications
- Chemical and Physical Properties in Aqueous Solutions
National Research Council Canada
2016-2025
Broad Institute
2024
Dana-Farber/Boston Children's Cancer and Blood Disorders Center
2024
Gwangju Institute of Science and Technology
2009-2019
Vietnam Military Medical University
2019
Colorado State University
2008-2016
The University of Texas at Arlington
2012-2015
Vietnam Academy of Science and Technology
2006
University of Newcastle Australia
2006
University of Oklahoma
1988
The objectives of 7-SEAS/BASELInE (Seven SouthEast Asian Studies/Biomass-burning Aerosols & Stratocumulus Environment: Lifecycles Interactions Experiment) campaigns in spring 2013–2015 were to synergize measurements from uniquely distributed ground-based networks (e.g., AERONET, MPLNET) and sophisticated platforms SMARTLabs, regional contributing instruments), along with satellite observations/retrievals atmospheric transport/chemical models establish a critically needed database, advance...
Monitoring of structural health plays a crucial role in condition-based maintenance and degradation prediction infrastructures. In this paper, we developed novel interdigitated capacitive (IDC) strain sensor which could be integrated wireless monitoring system for (SHM) applications. The IDC sensors were fabricated by laser-micromachining 127-μm-thick brass sheet followed encapsulation deformable thermoset polymers. was implemented using commercial module (eZ430-RF2500 from Texas...
Abstract. An algorithm based on triple-frequency (X, Ka, W) radar measurements that retrieves the size, water content and degree of riming ice clouds is presented. This study exploits potential multi-frequency to provide information bulk snow density should underpin better estimates characteristic size within volume. The Bayes' rule with parameterised by “fill-in” model. reflectivities are simulated a range scattering models corresponding realistic snowflake shapes. tested data collected...
Five analytical assays are described that provide a platform for systematically evaluating the effect of formulation variables on physical properties cationic lipid-DNA complexes (lipoplexes). The (i) lipid recovery, (ii) total DNA, (iii) free (iv) nuclease sensitivity, and (v) stability by filtration. Lipid recovery was determined measuring primary amino groups labeled with fluorescamine reagent in presence detergent Zwittergent. Zwittergent effective at disrupting lipoplexes, making amine...
Iridium oxide pH sensing film is demonstrated with wide pH-sensing ranges, high durability, and small drifts in potentials. Using sol-gel process, a lower fabrication cost less labor-intensive method, to deposit iridium thin films for reported previously by our group expected advantages. In this paper, we fabricate test characteristics of 4 × anhydrous thin-film electrode arrays on flexible substrates. The sensors exhibit Nernstian potential responses the range 57.0-63.4 mV/pH. Stability,...
Abstract The global precipitation measurement (GPM) mission is an international satellite to obtain accurate observations of on a scale every 3 h. Its core was launched 27 February 2014 with two science instruments: the microwave imager and dual‐frequency radar. Ground validation integral part GPM where instruments are deployed complement correlate spacecraft instruments. dual‐frequency, dual‐polarization, Doppler radar (D3R) critical ground instrument that developed for program. This paper...
Flexible iridium oxide (IrOx)-based micro-electrodes were fabricated on flexible polyimide substrates using a sol-gel deposition process for utilization as integrated pseudo-reference electrodes bio-electrochemical sensing applications. The fabrication method yields reliable miniature on-probe IrOx with long lifetime, high stability and repeatability. Such sensors can be used long-term measurements. Various dimensions of including 1 mm × mm, 500 µm µm, 100 fabricated. Sensor longevity pH...
Abstract. Regions with high ice water content (HIWC), composed of mainly small crystals, frequently occur over convective clouds in the tropics. Such regions can have median mass diameters (MMDs) <300 µm and equivalent radar reflectivities <20 dBZ. To explore formation mechanisms for these HIWCs, high-resolution simulations tropical observed on 26 May 2015 during High Altitude Ice Crystals – Water Content (HAIC-HIWC) international field campaign based out Cayenne, French Guiana, are...
Abstract. The dataset collected during the Radar Snow Experiment (RadSnowExp) presents first-ever airborne triple-frequency radar observations combined with almost perfectly co-located and coincident microphysical measurements from a single platform, National Research Council Canada (NRC) Convair-580 aircraft. potential of this is illustrated using data one flight an Arctic storm, which covers wide range snow habits pristine ice crystals low-density aggregates to heavily rimed particles...
Abstract. Secondary ice production (SIP) is an important physical phenomenon that results in increase the particle concentration and can therefore have a significant impact on evolution of clouds. In this study, idealized simulations mesoscale convective system (MCS) were conducted using high-resolution (250 m horizontal grid spacing) model detailed bulk microphysics scheme order to examine impacts SIP dynamics simulated tropical MCS. The compared airborne situ remote sensing observations...
Two approaches are described for stably conjugating peptides, proteins and oligonucleotides onto plasmid DNA. Both methods use a peptide nucleic acid (PNA) clamp, which binds irreversibly specifically to binding site cloned into the plasmid. The first approach uses biotin-conjugated PNA clamp that can be used introduce functional biotin groups streptavidin bind. Atomic force microscopy images of linearized show localized at predicted on DNA strand. Peptides containing free thiol were...
This paper presents the results of a recent flight campaign conducted over Great Lakes region and reports first observations W-band normalized backscattered cross section ( <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\sigma _{0}$ </tex-math></inline-formula> ) for V H polarization linear depolarization ratios (LDRs) from different types surfaces at moderate incidence angles (<70°). For sea surfaces,...
Abstract. This paper presents a methodology for ice water content (IWC) retrieval from dual-polarization side-looking X-band airborne radar. Measured IWC aircraft in situ probes is weighted by function of the radar differential reflectivity (Zdr) to reduce effects crystal shape and orientation on variation – specific phase (Kdp) joint distribution. A theoretical study indicates that proposed method, which does not require knowledge particle size distribution (PSD) number density crystals,...
Abstract During freezing rain, secondary ice produced by the fragmentation of drops (FFD) can initiate a chain reaction, potentially transitioning rain into pellets. Including this process in numerical weather prediction models is challenging due to uncertainty mechanism. To bridge gap, study aims evaluate efficiency FFD during pellet precipitation using measurements collected onboard National Research Council Canada (NRC) Convair-580 research aircraft 2022 Winter Precipitation Type...
Improving future climate predictions requires enhancing the current meteorological numerical models for which a better understanding of roles that clouds and aerosols (and their interactions) play in Earth&#8217;s weather is crucial.&#160; Along these lines, European Space Agency (ESA) Japan Aerospace Exploration (JAXA) successfully launched Earth Cloud, Aerosol, Radiation Explorer (EarthCARE) satellite May 2024. This mission aims to advance studies global aerosol cloud properties...
Abstract A parametric time domain method (PTDM) for clutter mitigation and precipitation spectral moments’ estimation weather radars is introduced. Use of PTDM allows the simultaneous echo moments. It shown that this approach leads to accurate estimates moments in presence clutter. Based on simulations, performance evaluated compared against filtering technique. In study special attention paid cases strong contamination. Furthermore, both methods, filter, are illustrated using Colorado State...
Abstract. The dataset collected during the Radar Snow Experiment (RadSnowExp) presents first-ever triple-frequency radar reflectivities combined with almost perfectly co-located and coincident airborne in situ microphysics probes on board National Research Council Canada (NRC) Convair-580 aircraft. Over 12 hours of flight data mixed phased glaciated clouds more than 3.4 non-Rayleigh regions for at least one frequencies provide a unique opportunity studying relationship between cloud...
Abstract During near-0°C surface conditions, diverse precipitation types (p-types) are possible, including rain, drizzle, freezing ice pellets, wet snow, and snow pellets. Near-0°C affects wide swaths of the United States Canada, impacting aviation, road transportation, power generation distribution, winter recreation, ecology, hydrology. Fundamental challenges remain in observing, diagnosing, simulating, forecasting p-types, particularly during transitions within complex terrain. Motivated...
NASA Dual-Frequency Dual-Polarized Doppler Radar (D3R) is a ground-based system developed to enable ground validation for the Global Precipitation Measurement (GPM) Mission. The radar makes measurements at both Ku- and Ka-band frequencies in order gain higher sensitivity towards light rain, drizzle snow. D3R capitalizes on solid-state transceiver which can considerably enhance of by allowing implementation pulse compression waveforms. However, use techniques accompanied challenges mitigate...
We describe a new method for recording spatially incoherent common-path off-axis color digital holograms. present the theoretical and experimental evidence to demonstrate an holographic (ICOCH) system capable of capturing information from three-dimensional objects under illumination, both in transmission reflection modes. Fresnel correlation holography (FINCH), system, is frequently used technique. Our proposed conceptually similar advanced form FINCH; moreover, it has three advantages over...
We present a spatially incoherent dual path Fourier holographic system. Conceptually it is similar to single channel holography (FISCH). Although our off-axis (IOFH) system does not have the robustness of system, has three advantages over FISCH, with two being quite obvious from setup. First, no SLM required, thus making simple and cost-effective. Second, capable high light throughput because in use reduces intensity half by splitting one beam into two; furthermore, an analyzer required...
Abstract. This work describes the implementation of polarization diversity on National Research Council Canada W-band Doppler radar and presents first-ever airborne measurements derived via pulse-pair processing. The are interleaved with standard staggered pulse repetition frequency, this allows a better understanding strengths drawbacks diversity, methodology that has been recently proposed for wind-focused space missions. Polarization clear advantage making possible observations very fast...