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History Of External Fixation, Thomas A. Decoster Aug 2022

History Of External Fixation, Thomas A. Decoster

Western Journal of Orthopaedics

No abstract provided.


Implementation And Outcomes Of A Remote Hepatitis B Screening Program Designed To Overcome Covid-19 Pandemic-Related Disruptions To Community-Based Screenings For Asians In Greater Philadelphia: A Descriptive Study, Yoonhee P Ha, Yusha Sun, Jack Wilkinson, Sonia Wang, Lillian Chien, Marisa Wu, Evangeline Wang, Catherine Freeland Aug 2022

Implementation And Outcomes Of A Remote Hepatitis B Screening Program Designed To Overcome Covid-19 Pandemic-Related Disruptions To Community-Based Screenings For Asians In Greater Philadelphia: A Descriptive Study, Yoonhee P Ha, Yusha Sun, Jack Wilkinson, Sonia Wang, Lillian Chien, Marisa Wu, Evangeline Wang, Catherine Freeland

College of Population Health Faculty Papers

No abstract provided.


Protocol: Remote Care As The ‘New Normal’? Multi-Site Case Study In Uk General Practice, T Greenhalgh, Se Shaw, Nishio A Alvarez, A Booth, R Byng, A Clarke, F Dakin, R Davies, S Faulkner, N Hemmings, L Husain, A Kalin, E Ladds, L Moore, R Rosen, S Rybczynska-Bunt, J Wherton, S Wieringa Aug 2022

Protocol: Remote Care As The ‘New Normal’? Multi-Site Case Study In Uk General Practice, T Greenhalgh, Se Shaw, Nishio A Alvarez, A Booth, R Byng, A Clarke, F Dakin, R Davies, S Faulkner, N Hemmings, L Husain, A Kalin, E Ladds, L Moore, R Rosen, S Rybczynska-Bunt, J Wherton, S Wieringa

Peninsula Medical School

Background: Following a pandemic-driven shift to remote service provision, UK general practices offer telephone, video or online consultation options alongside face-to-face. This study explores practices’ varied experiences over time as they seek to establish remote forms of accessing and delivering care. Methods: This protocol is for a mixed-methods multi-site case study with co-design and national stakeholder engagement. 11 general practices were selected for diversity in geographical location, size, demographics, ethos, and digital maturity. Each practice has a researcher-in-residence whose role is to become familiar with its context and activity, follow it longitudinally for two years using interviews, public-domain documents and …


Oncogenic Collagen I Homotrimers From Cancer Cells Bind To Α3Β1 Integrin And Impact Tumor Microbiome And Immunity To Promote Pancreatic Cancer, Yang Chen, Sujuan Yang, Jena Tavormina, Desiree Tampe, Michael Zeisberg, Krishnan K Mahadevan, Hikaru Sugimoto, Chia-Chi Chang, Robert R Jenq, Kathleen M Mcandrews, Raghu Kalluri Aug 2022

Oncogenic Collagen I Homotrimers From Cancer Cells Bind To Α3Β1 Integrin And Impact Tumor Microbiome And Immunity To Promote Pancreatic Cancer, Yang Chen, Sujuan Yang, Jena Tavormina, Desiree Tampe, Michael Zeisberg, Krishnan K Mahadevan, Hikaru Sugimoto, Chia-Chi Chang, Robert R Jenq, Kathleen M Mcandrews, Raghu Kalluri

Faculty, Staff and Student Publications

In contrast to normal type I collagen (Col1) heterotrimer (α1/α2/α1) produced by fibroblasts, pancreatic cancer cells specifically produce unique Col1 homotrimer (α1/α1/α1). Col1 homotrimer results from epigenetic suppression of the Col1a2 gene and promotes oncogenic signaling, cancer cell proliferation, tumor organoid formation, and growth via α3β1 integrin on cancer cells, associated with tumor microbiome enriched in anaerobic Bacteroidales in hypoxic and immunosuppressive tumors. Deletion of Col1 homotrimers increases overall survival of mice with pancreatic ductal adenocarcinoma (PDAC), associated with reprograming of the tumor microbiome with increased microaerophilic Campylobacterales, which can be reversed with broad-spectrum antibiotics. Deletion of Col1 homotrimers enhances …


Nitrite Lowers The Oxygen Cost Of Atp Supply In Cultured Skeletal Muscle Cells By Stimulating The Rate Of Glycolytic Atp Synthesis, Anthony G. Wynne, Charles Affourtit Aug 2022

Nitrite Lowers The Oxygen Cost Of Atp Supply In Cultured Skeletal Muscle Cells By Stimulating The Rate Of Glycolytic Atp Synthesis, Anthony G. Wynne, Charles Affourtit

School of Biomedical Sciences

Dietary nitrate lowers the oxygen cost of human exercise. This effect has been suggested to result from stimulation of coupling efficiency of skeletal muscle oxidative phosphorylation by reduced nitrate derivatives. In this paper, we report the acute effects of sodium nitrite on the bioenergetic behaviour of cultured rat (L6) myocytes. At odds with improved efficiency of mitochondrial ATP synthesis, extracellular flux analysis reveals that a ½-hour exposure to NaNO2 (0.1–5 μM) does not affect mitochondrial coupling efficiency in static myoblasts or in spontaneously contracting myotubes. Unexpectedly, NaNO2 stimulates the rate of glycolytic ATP production in both myoblasts and myotubes. Increased …


Remote Care In Uk General Practice: Baseline Data On 11 Case Studies, T Greenhalgh, Se Shaw, Nishio A Alvarez, R Byng, A Clarke, F Dakin, S Faulkner, N Hemmings, L Husain, A Kalin, E Ladds, L Moore, R Rosen, S Rybczynska-Bunt, J Wherton, S Wieringa Aug 2022

Remote Care In Uk General Practice: Baseline Data On 11 Case Studies, T Greenhalgh, Se Shaw, Nishio A Alvarez, R Byng, A Clarke, F Dakin, S Faulkner, N Hemmings, L Husain, A Kalin, E Ladds, L Moore, R Rosen, S Rybczynska-Bunt, J Wherton, S Wieringa

Peninsula Medical School

Background: Accessing and receiving care remotely (by telephone, video or online) became the default option during the coronavirus disease 2019 (COVID-19) pandemic, but in-person care has unique benefits in some circumstances. We are studying UK general practices as they try to balance remote and in-person care, with recurrent waves of COVID-19 and various post-pandemic backlogs. Methods: Mixed-methods (mostly qualitative) case study across 11 general practices. Researchers-in-residence have built relationships with practices and become familiar with their contexts and activities; they are following their progress for two years via staff and patient interviews, documents and ethnography, and supporting improvement efforts through …


A Mouse Holder For Awake Functional Imaging In Unanesthetized Mice: Applications In 31p Spectroscopy, Manganese-Enhanced Magnetic Resonance Imaging Studies, And Resting-State Functional Magnetic Resonance Imaging, I-Chih Tan, Shelli R Kesler, Vikram Rao, S A Amali S Subasinghe, Russell S Ray, Jason T Yustein, Matthew J Allen, Brian W Gibson, Justin J Verlinden, Stanley Fayn, Nicole Ruggiero, Caitlyn Ortiz, Elizabeth Hipskind, Aaron Feng, Chijindu Iheanacho, Alex Wang, Robia G Pautler Aug 2022

A Mouse Holder For Awake Functional Imaging In Unanesthetized Mice: Applications In 31p Spectroscopy, Manganese-Enhanced Magnetic Resonance Imaging Studies, And Resting-State Functional Magnetic Resonance Imaging, I-Chih Tan, Shelli R Kesler, Vikram Rao, S A Amali S Subasinghe, Russell S Ray, Jason T Yustein, Matthew J Allen, Brian W Gibson, Justin J Verlinden, Stanley Fayn, Nicole Ruggiero, Caitlyn Ortiz, Elizabeth Hipskind, Aaron Feng, Chijindu Iheanacho, Alex Wang, Robia G Pautler

Faculty, Staff and Students Publications

Anesthesia is often used in preclinical imaging studies that incorporate mouse or rat models. However, multiple reports indicate that anesthesia has significant physiological impacts. Thus, there has been great interest in performing imaging studies in awake, unanesthetized animals to obtain accurate results without the confounding physiological effects of anesthesia. Here, we describe a newly designed mouse holder that is interfaceable with existing MRI systems and enables awake in vivo mouse imaging. This holder significantly reduces head movement of the awake animal compared to previously designed holders and allows for the acquisition of improved anatomical images. In addition to applications in …


Rapid 20th Century Warming Reverses 900-Year Cooling In The Gulf Of Maine, Nina M. Whitney, Alan D. Wanamaker, Caroline C. Ummenhofer, Beverly J. Johnson, Nathaniel Cresswell-Clay, Karl J. Kreutz Aug 2022

Rapid 20th Century Warming Reverses 900-Year Cooling In The Gulf Of Maine, Nina M. Whitney, Alan D. Wanamaker, Caroline C. Ummenhofer, Beverly J. Johnson, Nathaniel Cresswell-Clay, Karl J. Kreutz

All Faculty Scholarship

The Gulf of Maine, located in the western North Atlantic, has undergone recent, rapid ocean warming but the lack of long-term, instrumental records hampers the ability to put these significant hydrographic changes into context. Here we present multiple 300-year long geochemical records (oxygen, nitrogen, and previously published radiocarbon isotopes) measured in absolutely-dated Arctica islandica shells from the western Gulf of Maine. These records, in combination with climate model simulations, suggest that the Gulf of Maine underwent a long-term cooling over most of the last 1000 years, driven primarily by volcanic forcing and North Atlantic ocean dynamics. This cooling trend was …


Structural Covariance Of The Ventral Visual Stream Predicts Posttraumatic Intrusion And Nightmare Symptoms: A Multivariate Data Fusion Analysis, Nathaniel G Harnett, Stacey L House, Et Al Aug 2022

Structural Covariance Of The Ventral Visual Stream Predicts Posttraumatic Intrusion And Nightmare Symptoms: A Multivariate Data Fusion Analysis, Nathaniel G Harnett, Stacey L House, Et Al

2020-Current year OA Pubs

Visual components of trauma memories are often vividly re-experienced by survivors with deleterious consequences for normal function. Neuroimaging research on trauma has primarily focused on threat-processing circuitry as core to trauma-related dysfunction. Conversely, limited attention has been given to visual circuitry which may be particularly relevant to posttraumatic stress disorder (PTSD). Prior work suggests that the ventral visual stream is directly related to the cognitive and affective disturbances observed in PTSD and may be predictive of later symptom expression. The present study used multimodal magnetic resonance imaging data (n = 278) collected two weeks after trauma exposure from the AURORA …


Identification Of Activity-Induced Egr3-Dependent Genes Reveals Genes Associated With Dna Damage Response And Schizophrenia, Ketan K Marballi, Khaled Alganem, Samuel J Brunwasser, Arhem Barkatullah, Kimberly T Meyers, Janet M Campbell, Annika B Ozols, Robert E Mccullumsmith, Amelia L Gallitano Aug 2022

Identification Of Activity-Induced Egr3-Dependent Genes Reveals Genes Associated With Dna Damage Response And Schizophrenia, Ketan K Marballi, Khaled Alganem, Samuel J Brunwasser, Arhem Barkatullah, Kimberly T Meyers, Janet M Campbell, Annika B Ozols, Robert E Mccullumsmith, Amelia L Gallitano

2020-Current year OA Pubs

Bioinformatics and network studies have identified the immediate early gene transcription factor early growth response 3 (EGR3) as a master regulator of genes differentially expressed in the brains of patients with neuropsychiatric illnesses ranging from schizophrenia and bipolar disorder to Alzheimer's disease. However, few studies have identified and validated Egr3-dependent genes in the mammalian brain. We have previously shown that Egr3 is required for stress-responsive behavior, memory, and hippocampal long-term depression in mice. To identify Egr3-dependent genes that may regulate these processes, we conducted an expression microarray on hippocampi from wildtype (WT) and Egr3-/- mice following electroconvulsive seizure (ECS), a …


Corpora Amylacea Are Associated With Tau Burden And Cognitive Status In Alzheimer's Disease, Connor M Wander, Tamy Harumy Moraes Tsujimoto, John F Ervin, Chanung Wang, Spencer M Maranto, Vanya Bhat, Julian D Dallmeier, Shih-Hsiu Jerry Wang, Feng-Chang Lin, William K Scott, David M Holtzman, Todd J Cohen Aug 2022

Corpora Amylacea Are Associated With Tau Burden And Cognitive Status In Alzheimer's Disease, Connor M Wander, Tamy Harumy Moraes Tsujimoto, John F Ervin, Chanung Wang, Spencer M Maranto, Vanya Bhat, Julian D Dallmeier, Shih-Hsiu Jerry Wang, Feng-Chang Lin, William K Scott, David M Holtzman, Todd J Cohen

2020-Current year OA Pubs

Corpora amylacea (CA) and their murine analogs, periodic acid Schiff (PAS) granules, are age-related, carbohydrate-rich structures that serve as waste repositories for aggregated proteins, damaged cellular organelles, and other cellular debris. The structure, morphology, and suspected functions of CA in the brain imply disease relevance. Despite this, the link between CA and age-related neurodegenerative diseases, particularly Alzheimer's disease (AD), remains poorly defined. We performed a neuropathological analysis of mouse PAS granules and human CA and correlated these findings with AD progression. Increased PAS granule density was observed in symptomatic tau transgenic mice and APOE knock-in mice. Using a cohort of …


Supporting The Transition From Recent Graduate To Trainee; The Educational Transition Document, Sally Hanks Aug 2022

Supporting The Transition From Recent Graduate To Trainee; The Educational Transition Document, Sally Hanks

Peninsula Dental School

No abstract provided.


Binar Space Program: Mission Two Payloads And Operations Plan, Stuart Buchan, Fergus Downey, Benjamin Hartig, Daniel Busan, Jacob Cook, Chelsea Tay, Kyle Mcmullan, Tristan Ward, Robert Howie, Phil Bland, Jonathan Paxman Aug 2022

Binar Space Program: Mission Two Payloads And Operations Plan, Stuart Buchan, Fergus Downey, Benjamin Hartig, Daniel Busan, Jacob Cook, Chelsea Tay, Kyle Mcmullan, Tristan Ward, Robert Howie, Phil Bland, Jonathan Paxman

Small Satellite Conference

The second mission of Western Australia’s Binar Space Program consists of three 1U CubeSats targeting a 2023 launch. Aiming to improve the platform for future missions, the primary purpose of Binar 2, 3 and 4 is on-orbit testing of radiation shielding alloys developed by CSIRO. In this first-of-its-kind experiment, all three simultaneously deployed Binar spacecraft will contain radiation sensing payloads to assess the efficacy of various compositions of Australian made radiation shielding alloys. Alongside this, hardware changes to the Binar platform are discussed, including deployable solar arrays, additional communications solutions, and a removable payload bay. The Iridium network will be …


Itasat-2 Mission Overview, Luís Eduardo Vergueiro Loures Da Costa, Tiago Matos, Lidia Hissae Shibuya Sato, Ana Carolina Jeronymo, Victoria De Souza Rodrigues, Thadeu De Carvalho Aug 2022

Itasat-2 Mission Overview, Luís Eduardo Vergueiro Loures Da Costa, Tiago Matos, Lidia Hissae Shibuya Sato, Ana Carolina Jeronymo, Victoria De Souza Rodrigues, Thadeu De Carvalho

Small Satellite Conference

The ITASAT-2 project is part of a progressive development of CubeSat space missions at the Instituto Tecnológico de Aeronáutica (ITA). Focused simultaneously on space weather and on the development of new technological solutions, the ITASAT-2 mission is based on the previous developments of the ITASAT-1 and SPORT missions. Consisting of three 12U CubeSats in a formation flight, the mission expands on the study of ionospheric plasma movements and density, small-scale ionospheric structures, magnetic field, and radiation environment. On the development of technological solutions, the mission proposes to test a baseline option at LEO to understand the influence of ionospheric phenomena …


Bronco Ember An Edge Computing Acceleration Platform With Computer Vision, Zachary Gaines, Maximum Wilder-Smith, Cristian Rodriguez Aug 2022

Bronco Ember An Edge Computing Acceleration Platform With Computer Vision, Zachary Gaines, Maximum Wilder-Smith, Cristian Rodriguez

Small Satellite Conference

Bronco Ember is a nascent wildfire detection system that leverages edge computing capabilities, multi-spectral imaging, and artificial intelligence to greatly increase the performance of small satellite remote sensing payloads. The core hardware onboard is a SWIR InGaAs camera imaging in the 900nm to 1700nm wavelength and a GPU enabled single board computer. Artificial intelligence is used for fire detection and analysis using computer vision and neural networks being able to detect fires only filling a few pixels in each image. The system is based on traditional CNN networks and includes time series analysis that gives the system an 85% success …


The Canvas Mission: Quantifying The Very-Low-Frequency Radio Energy Input From The Ground Into The Earth's Magnetosphere, Robert A. Marshall, Riley A. Reid, James M. Cannon, Sebastian Wankmueller, Paraksh Vankawala, Scott Palo, David M. Malaspina, Thierry Dudok De Wit, Guillaume Jannet Aug 2022

The Canvas Mission: Quantifying The Very-Low-Frequency Radio Energy Input From The Ground Into The Earth's Magnetosphere, Robert A. Marshall, Riley A. Reid, James M. Cannon, Sebastian Wankmueller, Paraksh Vankawala, Scott Palo, David M. Malaspina, Thierry Dudok De Wit, Guillaume Jannet

Small Satellite Conference

Very-low-frequency (VLF) electromagnetic waves, emitted by ground-based sources including lightning and VLF transmitters, can impact the lower ionosphere and magnetosphere through their interaction with the local plasma and energetic particle environments. Quantifying the impacts of these waves requires an accurate assessment of the propagation and attenuation of these waves. The Climatology of Anthropogenic and Natural VLF wave Activity in Space (CANVAS) mission is designed to measure VLF waves in low Earth orbit originating from these ground-based sources. The mission aims to characterize the VLF environment in low Earth orbit to address two main goals: i) constrain the VLF wave injection …


Update On The Cubesat Program Of The National Science Foundation, Mangala Sharma Aug 2022

Update On The Cubesat Program Of The National Science Foundation, Mangala Sharma

Small Satellite Conference

Since 2008, the U.S. National Science Foundation (NSF) has provided grant funding for over a dozen university-led cubesat missions for scientific research and STEM education. The aims of the NSF cubesat program are to advance observations for space weather, atmospheric and geospace sciences as well as technology development in aerospace engineering and radiocommunications, and to provide “out of this world” leadership opportunities for university students in space missions. This presentation by the NSF Program Director managing the cubesat portfolio will provide an update on the NSF cubesat program.


Snooping Around: Observation Planning For The Signals Of Opportunity P-Band Investigation (Snoopi), Justin Mansell, Elisa Rivera, Seho Kim, Benjamin R. Nold, James L. Garrison, Manuel A. Vega, Juan C. Raymond, Roger Banting, Weihang Li, Hasnaa Khalifi, Rajat Bindlish, Rashmi Shah Aug 2022

Snooping Around: Observation Planning For The Signals Of Opportunity P-Band Investigation (Snoopi), Justin Mansell, Elisa Rivera, Seho Kim, Benjamin R. Nold, James L. Garrison, Manuel A. Vega, Juan C. Raymond, Roger Banting, Weihang Li, Hasnaa Khalifi, Rajat Bindlish, Rashmi Shah

Small Satellite Conference

Launching October 2022, the SigNals Of Opportunity P-band Investigation (SNOOPI) is a 6U CubeSat dedicated to demonstrating spaceborne remote sensing of root zone soil moisture and snow water equivalent using signals of opportunity. P-band (240-500 MHz) frequencies are required to penetrate dense vegetation or snow and into the top 200 cm of soil, but this band is heavily subscribed. Rather than transmitting its own signal SNOOPI will observe reflected signals from the U.S. Navy’s Mobile User Objective System satellites. This makes planning observations challenging. The point of reflection is a function of both the transmitter and receiver satellite positions as …


Ernst: Demonstrating Advanced Infrared Detection From A 12u Cubesat, Martin Schimmerohn, Clemens Horch, Stephan Busch, Noah Ledford, Konstantin Schäfer, Thorsten Maue, Mike Weber, Konstantin Kappe, Frank Schäfer, Caroline Schweitzer, Stefan K. Höffgen, Andreas Paape Aug 2022

Ernst: Demonstrating Advanced Infrared Detection From A 12u Cubesat, Martin Schimmerohn, Clemens Horch, Stephan Busch, Noah Ledford, Konstantin Schäfer, Thorsten Maue, Mike Weber, Konstantin Kappe, Frank Schäfer, Caroline Schweitzer, Stefan K. Höffgen, Andreas Paape

Small Satellite Conference

The ERNST mission will demonstrate complex infrared detection capabilities using a 12U CubeSat platform. ERNST’s main payload is an advanced cryogenically-cooled infrared imager that implicates demanding requirements in terms of power demand, heat dissipation, and vibration response for a nanosatellite. The optical bench that integrates optics, a filter-wheel for switching between spectral bands, and the detector-cooler system has been additively designed and manufactured, giving it a bionic appearance and combined with a highly efficient radiator. An onboard radiation monitor and a COTS camera complete the mission payloads. The ERNST 12U platform is based on high-performance CubeSat subsystems for avionics, UHF, …


Ut Prosat-1: A Platform For Testing Lightweight Deployable Composite Structures, Derick Whited, Nick Angle, Gustavo Gargioni, Richard F. Gibbons Iii, Rob Engebretson, Sheyda Davaria, Samantha Kenyon, Jonathan Black Aug 2022

Ut Prosat-1: A Platform For Testing Lightweight Deployable Composite Structures, Derick Whited, Nick Angle, Gustavo Gargioni, Richard F. Gibbons Iii, Rob Engebretson, Sheyda Davaria, Samantha Kenyon, Jonathan Black

Small Satellite Conference

This paper details the mission, challenges during the design process, and lessons learned from the development of an upcoming 3U cubesat from Virginia Tech dubbed Ut ProSat-1, scheduled to launch in 2023 on NG-19. This student-designed, -built, and -operated flight is a follow-on from the VT ThickSat launch in February 2021, incorporating lessons learned and upgrading specific experiments. The mission science goal is to demonstrate the reusability of lightweight deployable space structures for solar sails, antennas, and other extended components as well as characterizing the dynamic properties of the deployed structure while in space. In addition, the team has set …


In-Orbit Demonstration Of Propellant-Less Formation Flight With Momentum Exchange Of Jointed Multiple Cubesats In The Magnaro Mission, Takaya Inamori, Park Ji-Hyun, Keita Nagai, Hiroto Tamura, Gu Xinbo, Yoshiki Fujita, Ryusei Yamaguchi, Takeru Miyamoto, Daiki Ukita, Takatomo Osaki, Yuta Sakaguchi, Naoya Tamaoki, Yutaka Yasuda Aug 2022

In-Orbit Demonstration Of Propellant-Less Formation Flight With Momentum Exchange Of Jointed Multiple Cubesats In The Magnaro Mission, Takaya Inamori, Park Ji-Hyun, Keita Nagai, Hiroto Tamura, Gu Xinbo, Yoshiki Fujita, Ryusei Yamaguchi, Takeru Miyamoto, Daiki Ukita, Takatomo Osaki, Yuta Sakaguchi, Naoya Tamaoki, Yutaka Yasuda

Small Satellite Conference

Recently, small satellites such as CubeSats have been applied to a variety of missions such as scientific observations and remote sensing. One of attractive applications that can be relatively easily achieved by small satellites are multi-satellite missions such as formation flight and constellation. As a new method to realize these multi-satellite missions, we propose a method to separate jointed multiple satellite magnetically to generate ΔV without thrusters. To demonstrate the proposed method, we are developing a 3U sized CubeSat called MAGNARO (MAGnetically separating NAnosatellite with Rotation for Orbit control).


Rapid Development Of Low-Cost 1/2u Adaptive Optics Testbed, Ariel Sandberg, Albert Thieu, Anil Mankame, Zachary Palmer, Joel Kiers, Mark Wilder, Lulu Liu Aug 2022

Rapid Development Of Low-Cost 1/2u Adaptive Optics Testbed, Ariel Sandberg, Albert Thieu, Anil Mankame, Zachary Palmer, Joel Kiers, Mark Wilder, Lulu Liu

Small Satellite Conference

We present the development of the low-cost, rapid development 1/2U AMS Beacon CubeSat payload, with focus on design architecture and risk reduction of the system. The AMS Beacon payload (Beacon) will be integrated into the Agile MicroSat (AMS) 6U CubeSat platform developed by MIT Lincoln Laboratory and will serve as a test platform for high-angle-rate adaptive optics (AO) on orbital targets. The payload will contain a high-intensity laser to provide point-source phase reference for ground-based AO development and test, a photodiode for measurement of received optical power, and a retroreflector for simulating passive object reflectance. The system utilizes commercial-off-theshelf (COTS) …


A Compact Gamma Ray And X-Ray Detector For Cube Satellites, Luke Kohler, Michael Quach, Matthew Roberts, Aisling Acuna, Brooke Webster Aug 2022

A Compact Gamma Ray And X-Ray Detector For Cube Satellites, Luke Kohler, Michael Quach, Matthew Roberts, Aisling Acuna, Brooke Webster

Small Satellite Conference

Cosmic radiation continues to be a constant threat to any prolonged space mission. Harboring biological or non-biological payloads aboard a spacecraft traveling in space, cosmic radiation showers ionizing particles such as gamma and x-ray particles from our neighboring stars in our solar system and galaxy clusters. These ionizing particles create extensive issues for extended space missions such as traveling to Mars due to their degrading radiation effects on the human body and spacecraft electronics. Although precise instruments give more accurate results, they are presented as expensive, bulky, and heavy for space missions. This paper presents the background, capabilities, and opportunity …


Finch: A Blueprint For Accessible And Scientifically Valuable Remote Sensing Satellite Missions, Adyn Miles, David Maranto, Shiqi Xu, Rosalind Liang, Yong Da Li, Jason Rock, Amreen Imrit, Maggie Kou, Abeer Fatima, Allen Kasum, Amy Saranchuk, Ana-Maria Zamrii, Andy Gong, Angelina Hui, Anthony Dimaggio, Bejamin Nero, Bettina Oghinan, Bruno Almeida, Brytni Richards, Cameron Rodriguez, Dhruv Sirohi, Eman Shayeb, Emma Belhadfa, Eren Cimentepe, Ginny Guo, Harshit Sohaney, Hiba Al-Falahi, Ian Vyse, Iliya Shofman, Jasnoor Guliani, Jennifer Zhang, Kanver Bhandal, Kejsi Gjerazi, Ketan Vasudeva, Khalil Damouni, Kimberley Orna, Konstantinos Papaspyridis, Kyoka Collina Stone, Maggie Fen Wang, Mary Cheng, Maxime Michet, Mingde Yin, Mirai Shinjo, Nicholas Glenn, Novera Ahmed, Omar Farag, Prachi K. Sukhnani, Punyaphat Sukcharoenchaikul, Rajvi Rana, Rediet Yohannes, Selena Liu, Shuhan Zheng, Stephanie Yi Fei Lu, Tianyi Zhang, Tobias Rozario, Wanda Janaeska, Yifan (Julia) Ye, Ziyu Chen Aug 2022

Finch: A Blueprint For Accessible And Scientifically Valuable Remote Sensing Satellite Missions, Adyn Miles, David Maranto, Shiqi Xu, Rosalind Liang, Yong Da Li, Jason Rock, Amreen Imrit, Maggie Kou, Abeer Fatima, Allen Kasum, Amy Saranchuk, Ana-Maria Zamrii, Andy Gong, Angelina Hui, Anthony Dimaggio, Bejamin Nero, Bettina Oghinan, Bruno Almeida, Brytni Richards, Cameron Rodriguez, Dhruv Sirohi, Eman Shayeb, Emma Belhadfa, Eren Cimentepe, Ginny Guo, Harshit Sohaney, Hiba Al-Falahi, Ian Vyse, Iliya Shofman, Jasnoor Guliani, Jennifer Zhang, Kanver Bhandal, Kejsi Gjerazi, Ketan Vasudeva, Khalil Damouni, Kimberley Orna, Konstantinos Papaspyridis, Kyoka Collina Stone, Maggie Fen Wang, Mary Cheng, Maxime Michet, Mingde Yin, Mirai Shinjo, Nicholas Glenn, Novera Ahmed, Omar Farag, Prachi K. Sukhnani, Punyaphat Sukcharoenchaikul, Rajvi Rana, Rediet Yohannes, Selena Liu, Shuhan Zheng, Stephanie Yi Fei Lu, Tianyi Zhang, Tobias Rozario, Wanda Janaeska, Yifan (Julia) Ye, Ziyu Chen

Small Satellite Conference

Satellite remote sensing missions have grown in popularity over the past fifteen years due to their ability to cover large swaths of land at regular time intervals, making them suitable for monitoring environmental trends such as greenhouse gas emissions and agricultural practices. As environmental monitoring becomes central in global efforts to combat climate change, accessible platforms for contributing to this research are critical. Many remote sensing missions demand high performance of payloads, restricting research and development to organizations with sufficient resources to address these challenges. Atmospheric remote sensing missions, for example, require extremely high spatial and spectral resolutions to generate …


Satellite For Estimating Aquatic Salinity And Temperature (Seasalt) - A Scientific Overview, Sean Mccarthy, Viviane Menezes, Paul Fucile, Kerri Cahoy, Mary Dahl, Albert Thieu, Cadence Payne, Charles Lindsay, Shreeyam Kacker Aug 2022

Satellite For Estimating Aquatic Salinity And Temperature (Seasalt) - A Scientific Overview, Sean Mccarthy, Viviane Menezes, Paul Fucile, Kerri Cahoy, Mary Dahl, Albert Thieu, Cadence Payne, Charles Lindsay, Shreeyam Kacker

Small Satellite Conference

SEASALT is a small satellite mission designed to explore the estimation of salinity in coastal environments using ocean color. A SEASALT constellation would fill the coastal gap by providing coastal SSS observations with much higher spatial resolution (30m) and much shorter revisit times (less than 1 day) on a global scale. Planet’s nanosatellites currently provide daily monitoring of the earth’s surface, as well as coastal locations, at 3-meter resolution. However, they do not have the required bands needed in the near infrared (NIR) for atmospheric correction (they only possess 1 NIR band), thus making atmospheric correction over water very challenging. …


Adapting On Orbit: Conclusions Of The Stp-H6 Spacecraft Supercomputing For Image And Video Processing Experiment, Evan W. Gretok, Seth Roffe, Antony Gillette, Alan D. George, Sebastian Sabogal, Theodore Schwarz Aug 2022

Adapting On Orbit: Conclusions Of The Stp-H6 Spacecraft Supercomputing For Image And Video Processing Experiment, Evan W. Gretok, Seth Roffe, Antony Gillette, Alan D. George, Sebastian Sabogal, Theodore Schwarz

Small Satellite Conference

Spacecraft Supercomputing for Image and Video Processing (SSIVP) was a payload aboard the Department of Defense Space Test Program – Houston 6 pallet deployed on the International Space Station. SSIVP was designed and constructed by graduate students at the NSF Center for Space, High-Performance, and Resilient Computing (SHREC) at the University of Pittsburgh. The primary objective of this experiment was to evaluate resilient- and parallel-computing capabilities in a small-satellite form factor. Five flight computers, each combining radiation-tolerant and commercial-off-the-shelf technologies, were networked by high-speed interconnects, enabling a reliable space-supercomputing paradigm. Image-processing and computer-vision experiments were conducted on Earth-observation imagery acquired …


Development Of Cubesat Spacecraft-To-Spacecraft Optical Link Detection Chain For The Click B/C Mission, Danielle E. Coogan, Joseph Conroy, Myles Clark, John W. Conklin, Hannah Tomio, William Kammerer, Peter Grenfell, Ondrej Čierny, Charles Lindsay, Maddie Garcia, Paul Serra, Kerri Cahoy, Jan Stupl, David Mayer, John Hanson Aug 2022

Development Of Cubesat Spacecraft-To-Spacecraft Optical Link Detection Chain For The Click B/C Mission, Danielle E. Coogan, Joseph Conroy, Myles Clark, John W. Conklin, Hannah Tomio, William Kammerer, Peter Grenfell, Ondrej Čierny, Charles Lindsay, Maddie Garcia, Paul Serra, Kerri Cahoy, Jan Stupl, David Mayer, John Hanson

Small Satellite Conference

The growing interest in and expanding applications of small satellite constellation networks necessitates effective and reliable high-bandwidth communication between spacecraft. The applications of these constellations (such as navigation or imaging) rely on the precise measurement of timing offset between the spacecraft in the constellation. The CubeSat Laser Infrared CrosslinK (CLICK) mission is being developed by the Massachusetts Institute of Technology (MIT), the University of Florida (UF), and NASA Ames Research Center. The second phase of the mission (CLICK-B/C) will demonstrate a crosslink between two CubeSats (B and C) that each host a < 2U laser communication payload. The terminals will demonstrate full-duplex spacecraft-to-spacecraft communications and ranging capability using commercial components. As part of the mission, CLICK will demonstrate two-way time-transfer for clock synchronization and data transfer at a minimum rate of 20 Mbps over separation distances ranging from 25 km to 580 km. The payloads of CLICK B and C include a receiver chain with a custom photodetector board, a Time-to-Digital Converter (TDC), a Microchip Chip-Scale Atomic Clock (CSAC), and a field-programmable gate array (FPGA). The payloads can measure internal propagation delays of the transmitter and the receiver, and cancel environmental effects impacting timing accuracy. The photodetector board is 2.5 cm x 2.5 cm and includes an avalanche photodiode (APD) and variable-gain amplifiers through which the detected signal is conditioned for the TDC to be time-stamped. This design has been developed from the UF and NASA Ames CubeSat Handling Of Multisystem Precision Time Transfer (CHOMPTT) project and associated MOCT (Miniature Optical Communication Transceiver) demonstration. The TDC samples the signal at four points: twice on the rising edge at set thresholds, and twice at the falling edge at those same thresholds. These four time-offset samples are sent to the FPGA, which combines the measurements for a reported timestamp of the detected laser pulse. These timestamps can then be used in a pulse-position modulation (PPM) demodulation scheme to receive data at up to 50 Mbps, to calculate range down to 10 cm, and for precision time-transfer with < 200 ps resolution. In this paper, we will discuss the designed capabilities and noise performance of the CLICK TDC-based optical receiver chain.


Autopayments Via Account Abstraction, Andrew Beams, Ranjit Kumaresan, Mohammad Mohsen Minaei Bidgoli, Mahdi Zamani, Srinivasan Raghuraman, Wanyun Gu Aug 2022

Autopayments Via Account Abstraction, Andrew Beams, Ranjit Kumaresan, Mohammad Mohsen Minaei Bidgoli, Mahdi Zamani, Srinivasan Raghuraman, Wanyun Gu

Defensive Publications Series

The present disclosure focuses to simplify the user’s ability to make autopayments without making use of the private key associated with the user while using a non-custodial wallet. The present disclosure describes that without making use of user’s private key, a smart contract can make an autopayment on behalf of the user to the merchant to whom the user wishes to make the payment. In other words, the smart contract will make the automatic payment to merchants associated with the user if the merchant’s details are present in the allowed list of the user, else, the smart contract may reject …


Whiteboard Detection System And Applications, Anonymous Aug 2022

Whiteboard Detection System And Applications, Anonymous

Defensive Publications Series

Abstract—In this paper, we propose to detect white boards in the conference rooms, training halls, seminar rooms, board rooms, or any kind of indoor environment when cameras are mounted either right in front of the white board or at any position where white boards are in the field of view of camera


Estimation Of Distance Of People From Video Camera Without Dedicated Depth Sensors, Anonymous Aug 2022

Estimation Of Distance Of People From Video Camera Without Dedicated Depth Sensors, Anonymous

Defensive Publications Series

The invention detects using computer vision algorithms, for the video conferencing system user, whether in call or outside call, the user has been sitting or standing at one location for the set duration of time and need to stand-up or take a walk. This experience is currently available through wearable technology where if user is wearing smart watch embedded with appropriate sensors, then the watch can detect such scenarios and then users can stand-up and take a walk. The computer vision-based detection methodology can run from any compute resources, be in the camera compute (CPU, GPU, DSP, specialized AI compute) …