A5085552632- Fluid Dynamics and Turbulent Flows
- Combustion and flame dynamics
- Aerodynamics and Acoustics in Jet Flows
- Computational Fluid Dynamics and Aerodynamics
- Photonic and Optical Devices
- Gas Dynamics and Kinetic Theory
- Advanced Fiber Optic Sensors
- Finite Group Theory Research
- Graph theory and applications
- Plasma and Flow Control in Aerodynamics
- Advanced Fiber Laser Technologies
- Fluid Dynamics and Vibration Analysis
- Mechanical and Optical Resonators
- Nuclear Engineering Thermal-Hydraulics
- Peripheral Nerve Disorders
- Spectroscopy and Laser Applications
- Complex Systems and Time Series Analysis
- Topological and Geometric Data Analysis
- Algebraic Geometry and Number Theory
- Engineering Education and Pedagogy
- Coding theory and cryptography
- Advanced Mathematical Identities
- Nerve Injury and Rehabilitation
- graph theory and CDMA systems
- Orthopedic Surgery and Rehabilitation
Lafayette College
2014-2024
Stanford University
1999-2024
Kepler Universitätsklinikum
2023
Medical University of Vienna
2023
LMU Klinikum
2022
Ludwig-Maximilians-Universität München
2022
Rutgers, The State University of New Jersey
2007-2013
Rutgers Sexual and Reproductive Health and Rights
2004-2010
Advanced Projects Research Incorporated (United States)
2002-2003
Optical resonance shifts are measured against a wide range of temperatures from cryogenic to room temperature for silica microspheres operating at whispering-gallery modes. The sensor head microsphere is coupled fiber taper and placed in an insulated cell where the air first cools down below 110 K then rises steadily slowly. transmission spectrum distributed feedback laser 1531 nm exciting microsphere–taper system monitored recorded every 1 increment. wavelength changes analyzed. Several...
Optical resonance shifts are measured against temperature changes for different silica beads ranging from 80 to 450 µm in diameter. A micro-bead is fabricated by hydrogen flame fusing the tip of a single mode fibre/taper, and coupled fibre taper submicrometre The coupling system whispering-gallery modes placed an insulated cell. air cell slowly heated up room about 10K higher, red wavelength during heating process recorded. Linear dependence shift versus rise observed all tested...
The spectral shift response of optical whispering-gallery modes due to the adsorption and desorption water molecules into a SiO2 nano-coating is investigated. This coating applied silica microsphere optical-shift measurements are made at very low humidity level (<10%). micro-optical coupling system incorporated sealed vacuum chamber for controlled testing. experimental observation whispering-gallery-mode with refractive index consistent theoretical analysis using Mie theory. A significant...
Abstract The basic physical mechanisms for shear layer growth have been shown in computations to change at very high compressibilities. A double diaphragm, shock tunnel driven hypersonic mixing facility is used reach compressibility levels not possible blowdown-type facilities. Mixing layers M c = 0.86 and 1.7 are examined streamwise, plan, end views using Schlieren acetone planar laser-induced fluorescence imaging schemes. Analysis of these images yields normalized rates, concentration...
The surface boundary through which a sonic jet in supersonic cross flow is injected shown to have significant effect on the size, penetration, and mixing characteristics of plume. A circular, high-pressure, into M = 3.4 crossflow well-characterized turbulent layer two different thicknesses (δ/d 0.6 6.1), with variable momentum ratios (J 1.2, 2.6, 5). Planar laser Mie scattering condensed ethanol droplets used quantitatively image fluid concentration both side end-views at multiple downstream...
Abstract Connective or muscular tissue crossing the axilla is named axillary arch (of Langer). It known to complicate surgery and compress nerves vessels transiting from arm. Our study aims at systematically researching frequency, insertions, composition dimension of arches in a large cohort individuals with regard gender bilaterality. In addition, it evaluating ability cause compression neurovascular bundle. Four hundred axillae 200 unembalmed previously unharmed cadavers were investigated...
The scalar-field imaging of a hypersonic mixing flow is performed in facility that shock tunnel driven. instantaneous mixture-fraction field two-dimensional layer (M1 = 5.1, M2 0.3) determined with temperature-insensitive planar laser-induced fluorescence technique nitric oxide (NO) as the tracer species. Single-shot images are obtained broadband excitation reduced temperature-sensitivity transition A2 sigma+ <-- X2 II(1/2) (0, 0) band NO near 226 nm. at convective Mach number 2.64 shown to...
** † ‡ Temperature measurement utilizing Whispering Gallery Modes (WGM) in silica microspheres is analytically and experimentally studied over a wide range of temperature, cryogenic (~110K) to above room temperatures (310K). Experimental results using resonance wavelength shift technique show excellent sensitivity repeatability for point temperature measurements as well the capability ultrahigh-resolution operation. Gas phase molecular detection spectra WGM also shown coated microspheres....
A data assimilation approach is developed for evaluation of fluid-thermal systems wherein a complete specification the boundary conditions not known priori and experimental diagnostics are restricted to limited region flowfield. The methodology applied configuration heated jet injected into laminar layer where temperature velocity unknowns. closed loop method selects initial locations measurements mean within flowfield using diode laser absorbance. Diode absorption near 761 nm molecular...
The current health crisis brought about by the COVID-19 pandemic not only had a global impact, it also exacerbated inequalities experienced students of diverse backgrounds in United States. Implementing inclusive and anti-racist pedagogical practices has gained heightened overdue sense urgency, especially during period emergency remote teaching. At Lafayette College, small liberal arts college Pennsylvania, USA, Inclusive Instructors Academy is semester-long program aimed at supporting...
A Dynamic Data Driven Application Systems (DDDAS) approach is developed for evaluation of fluid-thermal systems wherein a complete specification the boundary conditions not known priori and experimental diagnostics are restricted to limited region flowfield. The methodology applied configuration heated jet injected into laminar layer where temperature an unknown. Diode laser absorption measurements near 761 nm molecular oxygen recorded at 400Hz characterize time varying two dimensional jet....
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The basic physical mechanisms for shear layer growth have been shown in computations to change at very high compressibilities. A double diaphragm, shock tunnel driven hypersonic mixing facility is used reach compressibility levels not possible blowdown-type facilities. Mixing layers Mc = 0.8 and 1.7 are examined streamwise, plan, end views using Schlieren acetone PLIF imaging schemes. Analysis of these images yields normalized rates, concentration information on the fast side layer,...
The mixing of a sonic jet in supersonic crossflow is examined using Schlieren and Planar Laser Mie Scattering (PLMS) imaging techniques to quantify penetration mixing. jets injection angle, the momentum ratio, pressures are used examine their effect on Each configurations both turbulent boundary layer where δBL/d=7.5 thin with δBL/d~1. Varying characteristics will also allow examination interfacial area growth between M=3.45 crossflow. A similarity coordinate transform non-dimensionlize...