A5100753950- Ultrasound and Hyperthermia Applications
- Photoacoustic and Ultrasonic Imaging
- Ultrasound Imaging and Elastography
- Venous Thromboembolism Diagnosis and Management
- Clay minerals and soil interactions
- Ultrasound and Cavitation Phenomena
- Engineering Applied Research
- Ultrasonics and Acoustic Wave Propagation
- Acoustic Wave Resonator Technologies
- Geology and Paleoclimatology Research
- Geochemistry and Elemental Analysis
- Polar Research and Ecology
- Diagnosis and Treatment of Venous Diseases
- Iron oxide chemistry and applications
- Methane Hydrates and Related Phenomena
- Hydrocarbon exploration and reservoir analysis
- Thermography and Photoacoustic Techniques
- Ferroelectric and Piezoelectric Materials
- Microbial Fuel Cells and Bioremediation
- Soil and Unsaturated Flow
- Paleontology and Stratigraphy of Fossils
- Advanced Sensor and Energy Harvesting Materials
- Acoustic Wave Phenomena Research
- Mine drainage and remediation techniques
- Energy and Environmental Systems
University of North Carolina at Chapel Hill
2017-2024
Kyungpook National University
2011-2024
Soongsil University
2023-2024
Yonsei University Health System
2009-2024
University of Hong Kong
2020-2024
Korea Advanced Institute of Science and Technology
2021-2024
North Carolina State University
2014-2023
Yonsei University
2008-2023
Korea Institute of Science and Technology
2013-2023
Pusan National University
2012-2023
Temperature, pressure, and time have been thought to control the smectite-to-illite (S-I) reaction, an important diagenetic process used for petroleum exploration. We demonstrated that microorganisms can promote S-I reaction by dissolving smectite through reduction of structural Fe(III) at room temperature 1 atmosphere within 14 days. This typically requires conditions 300 degrees 350 C, 100 megapascals, 4 5 months in absence microbial activity. These results challenge conventional concept...
Generation of high power laser ultrasound strongly demands the advanced materials with efficient energy absorption, fast thermal diffusion, and large thermoelastic expansion capabilities. In this study, candle soot nanoparticles-polydimethylsiloxane (CSNPs-PDMS) composite was investigated as functional layer for an optoacoustic transducer high-energy conversion efficiency. The mean diameter collected carbon nanoparticles is about 45 nm, light absorption ratio at 532 nm wavelength up to...
The photoacoustic effect has been broadly applied to generate high frequency and broadband acoustic waves using lasers. However, the efficient conversion from laser energy power is required with intensity pressure (>10 MPa). In this study, we demonstrated generated carbon nanofibers–polydimethylsiloxane (CNFs-PDMS) thin films. average diameter of CNFs 132.7 ± 11.2 nm. thickness film CNFs-PDMS composite 24.4 1.43 μm 57.9 2.80 μm, respectively. maximum 12.15 1.35 MPa a 4.2 mJ, 532 nm...
A new type of bis‐PDA, in which two PDAs are linked via an intervening p ‐phenylene group, is developed. The Bis‐PDA‐Ph displays exceptional thermochromic reversibility owing to the presence unique hydrophobic interactions between alkyl chains as well aryl moieties. has a well‐packed structure that causes it display clear blue red colorimetric transition at elevated temperatures. To elucidate molecular origin response, theoretical simulation PDA, results successfully explain phenomenon,...
Data driven models of human poses and soft-tissue deformations can produce very realistic results, but they only model the visible surface body cannot create skin deformation due to interactions with environment. Physical simulations generalize external forces, their parameters are difficult control. In this paper, we present a layered volumetric learned from data. Our is composed data-driven inner layer physics-based layer. The statistical (VSMPL). soft tissue consists tetrahedral mesh that...
Abstract Effective removal or dissolution of large blood clots remains a challenge in clinical treatment acute thrombo-occlusive diseases. Here we report the development an intravascular microbubble-mediated sonothrombolysis device for improving thrombolytic rate and thus minimizing required dose drugs. We hypothesize that sub-megahertz, forward-looking ultrasound transducer with integrated microbubble injection tube is more advantageous efficient thrombolysis by enhancing cavitation-induced...
Plasma-induced surface amorphization prevents Sr phase separation, boosting the catalytic activity and stability of SOFC cathode. This finding expands application amorphous features to practical electrodes, previously limited model studies.
Hexagonal AlN is a non-ferroelectric material and does not have any phase transition up to its melting point (>2000°C), which indicates the potential use of for high-temperature sensing. In this work, elastic, dielectric, piezoelectric constants single crystals were investigated at elevated temperatures 1000°C by resonance method. We used resonators five different modes obtain complete set crystals. The electrical resistivity temperature (1000°C) was found be greater than 5 × 10(10) Ω · cm....
The main function of the skin is to protect body from external environment. barrier mainly provided by stratum corneum, which consists corneocytes bound with corneodesmosomes and lamellar lipids. Skin proteins like loricrin filaggrin also contribute function. In various diseases, dysfunction a common symptom, irritants detergents or surfactants could perturb Many efforts have been made develop strategies improve Here, we investigated whether microfluidized lysates Lactobacillus rhamnosus...
One major challenge in current microbubble (MB) and tissue plasminogen activator (tPA)-mediated sonothrombolysis techniques is effectively treating retracted blood clots, owing to the high density low porosity of clots. Nanodroplets (NDs) have potential enhance clot lysis their small size ability penetrate into clots drug delivery. For first time, we demonstrate that a sub-megahertz, forward-viewing intravascular (FVI) transducer can be used for ND-mediated sonothrombolysis, vitro. In this...
In force measurement applications, a piezoelectric sensor is one of the most popular sensors due to its advantages low cost, linear response, and high sensitivity. Piezoelectric effectively convert dynamic forces electrical signals by direct effect, but their use has been limited in measuring static easily neutralized surface charge. To overcome this shortcoming, several (either pure or quasistatic) sensing techniques using materials have developed utilizing unique parameters rather than...
Relaxor-PbTiO3 piezoelectric single crystals have been widely used in a broad range of electromechanical devices, including sensors, actuators, and transducers. This paper reviews the unique properties these for sensors. Design, fabrication characterization various relaxor-PT crystal sensors their applications are presented compared with ceramic counterparts. Newly applicable fields future trends also suggested this review paper.
As a novel composite material for laser ultrasound transducer, candle soot nanoparticles polydimethylsiloxane (CSPs-PDMS) has been demonstrated to generate high frequency, broadband, and high-amplitude waves. In this study, we investigated the mechanism of high-optoacoustic conversion efficiency exhibited by composite. A thermal-acoustic coupling model was proposed analyzing performance The theoretical result matches well with experimental observation. acoustic beam profile compared Field II...
Research Article| April 15, 2019 Naturally occurring, microbially induced smectite-to-illite reaction Jinwook Kim; Kim * 1Department of Earth System Sciences, Yonsei University, Seoul 03722, South Korea *E-mails: jinwook@yonsei.ac.kr; dongh@cugb.edu.cn Search for other works by this author on: GSW Google Scholar Hailiang Dong; Dong 2State Key Laboratory Biogeology and Environmental Geology, China University Geosciences, Beijing 100083, China3Department Geology Science, Miami Oxford, Ohio...
Candle soot nanoparticles (CSNP) and polydimethylsiloxane (PDMS) composite has shown the highly efficient photoacoustic transduction owing to their high light absorption coefficient low interfacial thermal resistance. In this study, we report effect of candle structure thickness on efficiency. Optical properties CSNP/PDMS nanocomposites were characterized through both experimental measurements finite difference time domain analysis in visible wavelength range, indicating that carbon volume...
We evaluated potential biomarkers in human whole saliva for the early diagnosis of oral squamous cell carcinoma (OSCC). selected 30 candidate genes with relevance to cancer from recent reports PubMed. Saliva samples were obtained 34 non-tumor control and 33 OSCC patients. Real-time PCR was performed, mRNA levels compared. Normalized six (NGFI-A binding protein 2 (NAB2), cytochrome P450, family 27, subfamily A, polypeptide 1 (CYP27A1), nuclear pore complex interacting family, member B4...
This manuscript provides a review of candle-soot nanoparticle (CSNP) composite laser ultrasound transmitters (LUT), and compares contrasts this technology to other carboncomposite designs. Among many carbon-based LUTs, CSNP has shown its advantages maximum energy conversion fabrication simplicity for developing highly efficient transmitters. focuses on the challenges CSNP-composite transmitter in aspects nanostructure design, procedure, promising applications. Included are brief description...
OpenFlow switching and Network Operating System (NOX) have been proposed to support new conceptual networking trials for fine-grained control visibility. The is expected provide multi-layer with capability of Ethernet, MPLS, IP routing. NOX provides logically centralized access high-level network abstraction exerts over the by installing flow entries in compatible switches. NOX, however, missing necessary functions QoS-guaranteed software defined (SDN) service provisioning on carrier grade...