Activity
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Nuclear One played a pivotal role in sparking my passion for plasma physics during my early years in Arkansas. Today, I am thrilled to be on the path…
Nuclear One played a pivotal role in sparking my passion for plasma physics during my early years in Arkansas. Today, I am thrilled to be on the path…
Liked by John Janiczek
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I just found out that after almost 3 years, I HAVE BEEN ISSUED A PATENT! Thank you so much to Ethan Coeytaux, Ziming Yin for making this happen and…
I just found out that after almost 3 years, I HAVE BEEN ISSUED A PATENT! Thank you so much to Ethan Coeytaux, Ziming Yin for making this happen and…
Liked by John Janiczek
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🆕 Introducing Zoom’s first open-source, telehealth starter application developed for unique virtual healthcare experiences on the Web, powered by…
🆕 Introducing Zoom’s first open-source, telehealth starter application developed for unique virtual healthcare experiences on the Web, powered by…
Liked by John Janiczek
Experience & Education
Publications
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The Emirates Mars Mission (EMM) Emirates Mars InfraRed Spectrometer (EMIRS) Instrument
Springer Nature: Space Science Reviews
The Emirates Mars Mission Emirates Mars Infrared Spectrometer (EMIRS) will provide remote measurements of the martian surface and lower atmosphere in order to better characterize the geographic and diurnal variability of key constituents (water ice, water vapor, and dust) along with temperature profiles on sub-seasonal timescales. EMIRS is a FTIR spectrometer covering the range from 6.0-100+ μm (1666-100 cm−1) with a spectral sampling as high as 5 cm−1 and a 5.4-mrad IFOV and a 32.5×32.5 mrad…
The Emirates Mars Mission Emirates Mars Infrared Spectrometer (EMIRS) will provide remote measurements of the martian surface and lower atmosphere in order to better characterize the geographic and diurnal variability of key constituents (water ice, water vapor, and dust) along with temperature profiles on sub-seasonal timescales. EMIRS is a FTIR spectrometer covering the range from 6.0-100+ μm (1666-100 cm−1) with a spectral sampling as high as 5 cm−1 and a 5.4-mrad IFOV and a 32.5×32.5 mrad FOV. The EMIRS optical path includes a flat 45° pointing mirror to enable one degree of freedom and has a +/- 60° clear aperture around the nadir position which is fed to a 17.78-cm diameter Cassegrain telescope. The collected light is then fed to a flat-plate based Michelson moving mirror mounted on a dual linear voice-coil motor assembly. An array of deuterated L-alanine doped triglycine sulfate (DLaTGS) pyroelectric detectors are used to sample the interferogram every 2 or 4 seconds (depending on the spectral sampling selected). A single 0.846 μm laser diode is used in a metrology interferometer to provide interferometer positional control, sampled at 40 kHz (controlled at 5 kHz) and infrared signal sampled at 625 Hz. The EMIRS beamsplitter is a 60-mm diameter, 1-mm thick 1-arcsecond wedged chemical vapor deposited diamond with an antireflection microstructure to minimize first surface reflection. EMIRS relies on an instrumented internal v-groove blackbody target for a full-aperture radiometric calibration. The radiometric precision of a single spectrum (in 5 cm−1 mode) is <3.0×10−8 W cm−2 sr−1/cm−1 between 300 and 1350 cm−1 over instrument operational temperatures (<∼0.5 K NEΔT @ 250 K). The absolute integrated radiance error is < 2% for scene temperatures ranging from 200-340 K. The overall EMIRS envelope size is 52.9×37.5×34.6 cm and the mass is 14.72 kg including the interface adapter plate....
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Differentiable Programming for Hyperspectral Unmixing Using a Physics-based Dispersion Model
European Conference on Computer Vision
Hyperspectral unmixing is an important remote sensing task with applications including material identification and analysis. Characteristic spectral features make many pure materials identifiable from their visible-to-infrared spectra, but quantifying their presence within a mixture is a challenging task due to nonlinearities and factors of variation. In this paper, spectral variation is considered from a physics-based approach and incorporated into an end-to-end spectral unmixing algorithm via…
Hyperspectral unmixing is an important remote sensing task with applications including material identification and analysis. Characteristic spectral features make many pure materials identifiable from their visible-to-infrared spectra, but quantifying their presence within a mixture is a challenging task due to nonlinearities and factors of variation. In this paper, spectral variation is considered from a physics-based approach and incorporated into an end-to-end spectral unmixing algorithm via differentiable programming. The dispersion model is introduced to simulate realistic spectral variation, and an efficient method to fit the parameters is presented. Then, this dispersion model is utilized as a generative model within an analysis-by-synthesis spectral unmixing algorithm. Further, a technique for inverse rendering using a convolutional neural network to predict parameters of the generative model is introduced to enhance performance and speed when training data is available. Results achieve state-of-the-art on both infrared and visible-to-near-infrared (VNIR) datasets, and show promise for the synergy between physics-based models and deep learning in hyperspectral unmixing in the future.
Patents
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Systems and Methods for Differentiable Programming for Hyperspectral Unmixing
US 63/041,733
Honors & Awards
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Distinguished Master's Thesis Award - STEM category
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More activity by John
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It's not too late to sign up for our full-day tutorial on clinical speech AI at INTERSPEECH 2024. We'll talk shop while enjoying the Aegean views as…
It's not too late to sign up for our full-day tutorial on clinical speech AI at INTERSPEECH 2024. We'll talk shop while enjoying the Aegean views as…
Liked by John Janiczek
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Our paper about Canary has been accepted to INTERSPEECH 2024 and is now available on Arxiv. Check it out to learn how we trained one of the most…
Our paper about Canary has been accepted to INTERSPEECH 2024 and is now available on Arxiv. Check it out to learn how we trained one of the most…
Liked by John Janiczek
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I left my job as an analytical chemist at 25 I started learning SQL at 26 I started learning Python at 27 I started my career as a data scientist…
I left my job as an analytical chemist at 25 I started learning SQL at 26 I started learning Python at 27 I started my career as a data scientist…
Liked by John Janiczek
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I am really enjoying making educational content for advanced DSP / sound design. This week I go over audio rate modulation and how you can use it to…
I am really enjoying making educational content for advanced DSP / sound design. This week I go over audio rate modulation and how you can use it to…
Posted by John Janiczek
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PrecisionTerra, born from the Venture Partners at CU Boulder ecosystem, has joined the Forum Ventures Accelerator program's June Cohort! Very…
PrecisionTerra, born from the Venture Partners at CU Boulder ecosystem, has joined the Forum Ventures Accelerator program's June Cohort! Very…
Liked by John Janiczek
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Lots of exciting announcements today for Zoom Devsummit! 1. Co-browse SDK 2. Video SDK UI Toolkit web components 3. Video SDK UI Toolkit Android…
Lots of exciting announcements today for Zoom Devsummit! 1. Co-browse SDK 2. Video SDK UI Toolkit web components 3. Video SDK UI Toolkit Android…
Liked by John Janiczek
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We're counting down to the launch of NOAA: National Oceanic & Atmospheric Administration's GOES-U satellite next week at NASA - National Aeronautics…
We're counting down to the launch of NOAA: National Oceanic & Atmospheric Administration's GOES-U satellite next week at NASA - National Aeronautics…
Liked by John Janiczek
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Had an amazing time at #CVPR 2024! 🎉 I had the pleasure of presenting a poster at the CCD workshop and at the main conference. A huge thank you to…
Had an amazing time at #CVPR 2024! 🎉 I had the pleasure of presenting a poster at the CCD workshop and at the main conference. A huge thank you to…
Liked by John Janiczek
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Congrats to Regis Jesuit High School on their coding and robotics club accomplishments this past year! Great job to recent grads David Fales, Max…
Congrats to Regis Jesuit High School on their coding and robotics club accomplishments this past year! Great job to recent grads David Fales, Max…
Liked by John Janiczek
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Michael G Bennett and I participated in the AI for Higher Education Panel moderated by Sisi Wei. It is wonderful to attend The Higher Education Forum…
Michael G Bennett and I participated in the AI for Higher Education Panel moderated by Sisi Wei. It is wonderful to attend The Higher Education Forum…
Liked by John Janiczek
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