A5049887375- Spectroscopy and Chemometric Analyses
- Photonic and Optical Devices
- Semiconductor Quantum Structures and Devices
- Water Quality Monitoring and Analysis
- Semiconductor Lasers and Optical Devices
- Multimodal Machine Learning Applications
- GaN-based semiconductor devices and materials
- Advanced Chemical Sensor Technologies
- Essential Oils and Antimicrobial Activity
- Spectroscopy Techniques in Biomedical and Chemical Research
- Natural Language Processing Techniques
- Seismic Imaging and Inversion Techniques
- Leaf Properties and Growth Measurement
- Topic Modeling
- Spectroscopy and Laser Applications
- Postharvest Quality and Shelf Life Management
- Hydrocarbon exploration and reservoir analysis
- Domain Adaptation and Few-Shot Learning
- COVID-19 diagnosis using AI
- Acoustic Wave Resonator Technologies
- Stellar, planetary, and galactic studies
- Remote Sensing in Agriculture
- Nanowire Synthesis and Applications
- Photocathodes and Microchannel Plates
- Geophysical Methods and Applications
Plant & Food Research
2016-2022
The Dodd-Walls Centre for Photonic and Quantum Technologies
2017-2020
University of Otago
2020
University of Waikato
2015-2018
DEVCOM Army Research Laboratory
2014-2016
California Institute of Technology
2016
Goddard Space Flight Center
2014
University of South Carolina
2002
Northwestern University
1999
University of Virginia
1991
We incorporate an explicit neural interlingua into a multilingual encoder-decoder machine translation (NMT) architecture. demonstrate that our model learns language-independent representation by performing direct zero-shot (without using pivot translation), and the source sentence embeddings to create English Yelp review classifier that, through mediation of interlingua, can also classify French German reviews. Furthermore, we show despite smaller number parameters than pairwise collection...
We report the results of deep H-alpha and [O III] images bright WN7/WC4 Wolf-Rayet star WR 8 (HD 62910). These data show considerably more surrounding nebulosity than seen in prior imaging. The brighter portions nebula span 6' diameter exhibit considerable fine-scale structure including numerous emission clumps head-tail like features presumably due to effects star's stellar winds. Due overlap a relatively band unrelated foreground diffuse interstellar emission, 8's is best viewed via its...
Abstract We report the results of deep H α and [O iii ] images bright WN6/WC4 Wolf–Rayet (WR) star WR 8 (HD 62910). These data show considerably more surrounding nebulosity than seen in prior imaging. The brighter portions nebula span <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mo>≃</mml:mo> <mml:msup> <mml:mrow> <mml:mn>6</mml:mn> </mml:mrow> <mml:mo>′</mml:mo> </mml:msup> </mml:math> diameter exhibit considerable fine-scale structure including numerous...
We report on sub-milliwatt operation of ultra-violet light emitting diodes sapphire with a peak emission wavelength 315 nm having quaternary AlInGaN multiple quantum well (MQW) active region. A significant increase in the device-emitted power was achieved using an interdigitated finger geometry design, which reduces differential resistance and eliminates current crowding. The flip-chip mounting diced chips substrates improves thermal management increases extraction efficiency from device...
We describe a prototype dialogue response generation model for the customer service domain at Amazon. The model, which is trained in weakly supervised fashion, measures similarity between questions and agent answers using dual encoder network, Siamese-like neural network architecture. Answer templates are extracted from embeddings derived past answers, without turn-by-turn annotations. Responses to inquiries generated by selecting best template final set of templates. show that, closed like...
We incorporate an explicit neural interlingua into a multilingual encoder-decoder machine translation (NMT) architecture. demonstrate that our model learns language-independent representation by performing direct zero-shot (without using pivot translation), and the source sentence embeddings to create English Yelp review classifier that, through mediation of interlingua, can also classify French German reviews. Furthermore, we show despite smaller number parameters than pairwise collection...
The quantum efficiency of QWIPs is difficult to predict and optimize. Recently, we have established a quantitative 3- dimensional electromagnetic model for QE computation. In this work, used design optimize new detector structures. one approach, adjusted the volume resonate strongly with scattered light from diffractive elements (DEs). resulting intensified field increases correspondingly. We tested resonator-QWIP concept on four materials obtained satisfactory agreements between theory...
Previously, we adopted the resonator-QWIPs and increased FPA QE to 30 − 40%. In this work, performed a systematic theoretical analysis on potential performance based new detector structure. analysis, doping density number of quantum wells are varied obtain different characteristics. For 25 μm pixel pitch, 10 Me<sup>−</sup> integrated charge, F/2 optics, shows that 9.2 cutoff R-QWIP optimized for high temperature operation could provide 20 mK <i>NEΔT</i> at...
An optimized detector fabrication process is developed for resonator-quantum well infrared photodetectors (R-QWIPs). The R-QWIPs are the next generation of QWIP detectors that use resonances to increase quantum efficiency (QE). To achieve expected performance, geometry must be produced in precise specification. In particular, height diffractive elements and thickness active resonator uniformly accurately realized within 0.05-μm accuracy. this specification, an inductively coupled plasma...
A tomographic inversion approach using prestack depth migrated common image gathers is utilized to compensate reflection data for amplitude loss caused by transmission anomalies in the overburden. The has advantage of estimating losses from anywhere within overburden actual seismic raypaths. Examples show that method can mitigate attenuation and should be considered as one processes preserving processing important AVO analysis when are present.
Flip-chip 325 nm emission LEDs over sapphire with powers of 0.84 and 6.68 mW at 180 mA DC 1 A pulsed pump currents are reported. thermal management study shows the output power to be limited by package heat dissipation.
We are developing resonator-QWIPs for long wavelength applications. Detector pixels with 25 μm pitch were hybridized to fanout circuits radiometric measurements. With a moderate doping of 0.5 x 1018 cm<sup>-3</sup>, we achieved quantum efficiency 37% and conversion 15% in 1.3 μm-thick active material 35% QE 21% CE 0.6 material. Both detectors cutoff at 10.5 μm 2 bandwidth. The temperature which photocurrent equals dark current is about 65 K under F/2 optics. thicker detector shows...
As a physiological disorder, chilling injury in kiwifruit may develop when the fruit are stored for long periods at low storage temperature of 0–1°C. Presence inconsistent with marketing requirements high-quality fruit, lead to substantial financial and reputational losses. Thus, early detection or removal chill-damaged is desirable. This study demonstrates novel dual-laser scanning system which has potential be developed into fast online Actinidia chinensis var. ‘Zesy002’ kiwifruit. The...
This proceeding presents the current TIME-Pilot instrument design and status with a focus on close-packed modular detector arrays spectrometers. Results of laboratory tests prototype detectors spectrometers are discussed. is new mm-wavelength grating spectrometer array under development that will study Epoch Reionization (the period time when first stars galaxies ionized intergalactic medium) by mapping fluctuations redshifted 157:7 μm emission line singly carbon ([CII]) from redshift z ~...
Multispectral imaging has been studied in recent years as a means of assessing fruit firmness. Here we report on the development static multispectral system (MSI) that was used to validate potential technique for high-speed commercial grading. The consists high-performance CMOS camera, four lasers, electronically controlled shutters and location control system. It captures spectral scattering images fruit. In this study 100 `Royal Gala' apples have measured using MSI. MSI measurements were...