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38th International Cosmic Ray Conference, ICRC 2023

作者： Steinhebel, Amanda L. Striebig, Nicolas Jadhav, Manoj Violette, Daniel Durachka, David Boggs, Ryan Seo, Lindsey Hesh, Scott Suda, Yusuke Shin, Taylor K.-W. Metzler, Zachary Kierans, Carolyn Caputo, Regina Tajima, Hiroyasu Fukazawa, Yasushi Leys, Richard Peric, Ivan Metcalfe, Jessica Perkins, Jeremy S. NASA Postdoctoral Program Fellow United States NASA Goddard Space Flight Center GreenbeltMD United States Center for Research and Exploration in Space Science and Technology NASA GSFC GreenbeltMD United States University of Maryland College ParkMD United States Karlsruhe Institute of Technology Karlsruhe Germany Argonne National Laboratory LemontIL United States Physics Program Graduate School of Advanced Science and Engineering Hiroshima University Hiroshima739-8526 Japan Institute for Space-Environment Research Nagoya University Aichi Nagoya Japan NASA Wallops Flight Facility Wallops IslandVA United States University of Califormia Santa Cruz Santa CruzCA United States

Next-generation medium-energy gamma-ray instruments sensitive from 25 keV to 1 GeV must be able to measure and reconstruct incident photons in the photoabsorption, Compton, and pair-production regimes. Such robust functionality requires a tracker with high resolution, low noise, and low power. The monolithic CMOS active pixel silicon sensor AstroPix is a novel mission-enabling technology. AstroPix will provide the energy- and angular-resolution required of a medium-energy gamma-ray telescope while reducing noise with the dual detection-and-readout capabilities of an HVCMOS chip. Plans for A-STEP, a funded Astropix Sounding rocket technology dEmonstration Payload, will be presented. This roughly 2U-sized payload will include three layers of AstroPix quad-chips for cosmic ray and gamma ray detection and tracking. This technology demonstration mission also strengthens the design readiness of AMEGO-X, an MIDEX-sized MeV telescope mission concept. Additional supplementary development and testing of the AstroPix project will also be considered, including A-STEP simulation efforts for environment and detector response modeling. © Copyright owned by the author(s) under the terms of the Creative Commons.

关键词： Cosmology

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Development of an HV-CMOS active pixel sensor "AstroPix" for all-sky medium-energy gamma-ray telescopes 38

Development of an HV-CMOS active pixel sensor "AstroPix" for...

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38th International Cosmic Ray Conference, ICRC 2023

作者： Suda, Yusuke Caputo, Regina Steinhebel, Amanda L. Fleischhack, Henrike Striebig, Nicolas Jadhav, Manoj Luz, Ricardo Violette, Daniel Kierans, Carolyn Tajima, Hiroyasu Fukazawa, Yasushi Leys, Richard Peric, Ivan Metcalfe, Jessica Negro, Michela Perkins, Jeremy S. Physics Program Graduate School of Advanced Science and Engineering Hiroshima University Hiroshima739-8526 Japan NASA Goddard Space Flight Center GreenbeltMD United States Catholic University of America 620 Michigan Ave NE WashingtonDC20064 United States Center for Research and Exploration in Space Science and Technology NASA/GSFC GreenbeltMD20771 United States ASIC and Detector Laboratory Karlsruhe Institute of Technology Karlsruhe Germany Argonne National Laboratory LemontIL60440 United States Institute for Space Earth Environmental Research Kobayashi-Maskawa Institute for The Origin of Particles and the Universe Nagoya University Japan

All-sky medium-energy gamma-ray observations are essential to deepen our understanding of physics in extreme astronomical objects such as gamma-ray bursts and active galactic nuclei. Those observations are also highly needed to further develop multi-messenger astronomy. Next-generation all-sky MeV gamma-ray telescopes must have a large area detector and keep high sensitivities even in the energies in which Compton scattering is dominant. Having both a silicon tracker (scatterer) and a calorimeter (absorber) as the main detector is a promising configuration for such a space mission. In order to fulfill the requirements such as a large sensitive area, low noise, high energy/positional resolution, and low power, we have been developing an HV-CMOS active pixel sensor, AstroPix. In this contribution, we report performance evaluations of AstroPix such as I-V and noise, energy calibration/resolution/threshold, and depletion depth measurements. Current achievements as a sensor for next-generation all-sky MeV gamma-ray telescopes and future development will be discussed. © Copyright owned by the author(s) under the terms of the Creative Commons.

关键词： CMOS integrated circuits

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Impacts of land use and land cover changes on hydrological processes and sediment yield determined using the SWAT model

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International Journal of Sediment Research 2022年第1期37卷 54-69页

作者： Edivaldo Afonso de Oliveira Serr?o Madson Tavares Silva Thomás Rocha Ferreira Lorena Concei??o Paiva de Ataide Cleber Assis dos Santos Aline Maria Meiguins de Lima Vicente de Paulo Rodrigues da Silva Francisco de Assis Salviano de Sousa Denis José Cardoso Gomes Academic Unit of Atmospheric Sciences Federal University of Campina Grande Institute of Technology Civil Engineering Graduate Program Federal University of Pará Earth System Science Center National Institute of Space Research Institute of Geosciences Federal University of Pará Department of Physics Center for Natural and Exact Sciences Federal University of Santa Maria

Land use and land cover (LULC) changes strongly affect local hydrology and sediment *** current study focused on a basin in the Brazilian Amazon and had the following three objectives:(1) to perform an effective diagnosis of flow and sediment yield,(2) to evaluate the impacts of LULC changes over the last 40 years on the hydro-sedimentological variables,and (3) to investigate the impacts of the possible trends or breaking points in the flow,surface runoff,and sediment yield *** Soil and Water Assessment Tool (SWAT) model validation showed that the simulated results were consistent with the data measured in the dynamic reproduction of flow ***,changes in LULC altered surface runoff,sediment yield,and flow according to the Mann-Kendall and Pettitt non-parametric *** was also observed that the sub-basins in which pastureland is predominant are more susceptible to increased surface runoff and sediment *** to trend and homogeneity tests,these sub-basins had break points in the time series of these *** the other hand,in the sub-basins whose land cover is predominantly forest,the time series is homogeneous and *** current study highlighted the impacts that 40 years of LULC changes in an Amazonian basin had on hydro-sedimentological variables,which,in turn,can play an important role in changing the hydrological cycle,consequently these changes can also impact diverse human activities in the region,such as agribusiness,livestock,energy production,food security,and public water ***,it is concluded that the SWAT model is a good estimator of hydro-sedimentological processes in Amazonian basins and can be used by decision makers in the management of water and environmental resources.

关键词： Hydrological modeling Sediment yield Amazon basin SWAT model

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The path toward 500 um depletion of AstroPix, a pixelated silicon HVCMOS sensor for space and EIC

arXiv

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arXiv 2024年

作者： Steinhebel, Amanda L. Ott, Jennifer Kroger, Olivia Caputo, Regina Fadeyev, Vitaliy Affolder, Anthony Affolder, Kirsten Deshmukh, Aware Striebig, Nicolas Jadhav, Manoj Suda, Yusuke Fukazawa, Yasushi Metcalfe, Jessica Leys, Richard Peric, Ivan Shin, Taylor K.-W. Violette, Daniel NASA Postdoctoral Program Fellow United States NASA Goddard Space Flight Center GreenbeltMD United States University of California Santa Cruz Santa CruzCA United States Karlsruhe Institute of Technology Karlsruhe Germany Argonne National Laboratory LemontIL United States Physics Program Graduate School of Advanced Science and Engineering Hiroshima University Hiroshima739-8526 Japan

The precise reconstruction of Compton-scatter events is paramount for an imaging medium-energy gamma-ray telescope. The proposed AMEGO-X is enabled by a silicon tracker utilizing AstroPix chips - a pixelated silicon HVCMOS sensor novel for space use. To achieve science goals, each 500 × 500 µm2 pixel must be sensitive for energy deposits ranging from 25 - 700 keV with an energy resolution of 5 keV at 122 keV ( © 2024, CC BY.

关键词： Gamma rays

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The ALMA-QUARKS Survey.Ⅱ.The ACA 1.3 mm Continuum Source Catalog and the Assembly of Dense Gas in Massive Star-Forming Clumps

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Research in Astronomy and Astrophysics 2024年第6期24卷 119-139页

作者：许峰玮 Ke Wang Tie Liu Lei Zhu Guido Garay Xunchuan Liu Paul Goldsmith Qizhou Zhang Patricio Sanhueza Shengli Qin Jinhua He Mika Juvela Anandmayee Tej Hongli Liu Shanghuo Li Kaho Morii Siju Zhang Jianwen Zhou Amelia Stutz Neal JEvans Kee-Tae Kim Shengyuan Liu Diego Mardones Guangxing Li Leonardo Bronfman Ken’ichi Tatematsu Chang Won Lee Xing Lu Xiaofeng Mai Sihan Jiao James O.Chibueze Keyun Su Viktor L.Tóth Kavli Institute for Astronomy and Astrophysics Peking UniversityBeijing 100871China Department of Astronomy School of PhysicsPeking UniversityBeijing 100871China Shanghai Astronomical Observatory Chinese Academy of SciencesShanghai 200030China Chinese Academy of Sciences South America Center for Astronomy National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China Departamento de Astronomía Universidad de ChileLas Condes7591245 SantiagoChile Jet Propulsion Laboratory California Institute of Technology4800 Oak Grove DrivePasadena CA 91109USA Center for Astrophysics|Harvard&Smithsonian 60 Garden StreetCambridgeMA 02138USA National Astronomical Observatory of Japan National Institutes of Natural Sciences2-21-1 OsawaMitakaTokyo 181-8588Japan Astronomical Science Program The Graduate University for Advanced StudiesSOKENDAI2-21-1 OsawaMitakaTokyo 181-8588Japan School of Physics and Astronomy Yunnan UniversityKunming 650091China Yunnan Observatories Chinese Academy of SciencesKunming 650216China Department of Physics University of HelsinkiPO Box 64FI-00014 HelsinkiFinland Indian Institute of Space Science and Technology Thiruvananthapuram 695547KeralaIndia Max Planck Institute for Astronomy Königstuhl 17D-69117 HeidelbergGermany Department of Astronomy Graduate School of ScienceThe University of Tokyo7-3-1 HongoBunkyo-kuTokyo 113-0033Japan Max-Planck-Institut für Radioastronomie Auf dem Hügel 6953121 BonnGermany Departamento de AstronomÂıa Universidad de ConcepcionCasilla 160-CConcepci onChile Department of Astronomy The University of Texas at AustinTexas 78712-1205USA Korea Astronomy and Space Science Institute 776 Daedeokdae-roYuseong-guDaejeon 34055Republic of Korea Institute of Astronomy and Astrophysics Academia SinicaRoosevelt RoadTaipei 10617TaiwanChina South-Western Institute for Astronomy Research Yunnan UniversityKunming 650091China Korea Astronomy and Space Science Institute 776 Daedeok-daeroYuseong-guDaejeon 34055Republic of

Leveraging the high resolution,sensitivity,and wide frequency coverage of the Atacama Large Millimeter/submillimeter Array(ALMA),the QUARKS survey,standing for“Querying Underlying mechanisms of massive star formation with ALMA-Resolved gas Kinematics and Structures”,is observing 139 massive starforming clumps at ALMA Band 6(λ~1.3 mm).This paper introduces the Atacama Compact Array(ACA)7 m data of the QUARKS survey,describing the ACA observations and data *** multiwavelength data,we provide the first edition of QUARKS atlas,offering insights into the multiscale and multiphase interstellar medium in high-mass star *** ACA 1.3 mm catalog includes 207 continuum sources that are called ACA *** gas kinetic temperatures are estimated using three formaldehyde transitions with a non-LTE radiation transfer model,and the mass and density are derived from a dust emission *** ACA sources are massive(16–84 percentile values of 6–160 M_(⊙)),gravity-dominated(M∝R^(1.1))fragments within massive clumps,with supersonic turbulence(M>1)and embedded star-forming *** find a linear correlation between the masses of the fragments and the massive clumps,with a ratio of 6%between the *** considering fragments as representative of dense gas,the ratio indicates a dense gas fraction(DGF)of 6%,although with a wide scatter ranging from 1%to 10%.If we consider the QUARKS massive clumps to be what is observed at various scales,then the size-independent DGF indicates a self-similar fragmentation or collapsing mode in protocluster *** the ACA data over four orders of magnitude of luminosity-to-mass ratio(L/M),we find that the DGF increases significantly with L/M,which indicates clump evolutionary *** observed a limited fragmentation at the subclump scale,which can be explained by a dynamic global collapse process.

关键词： stars:formation ISM:kinematics and dynamics ISM:clouds stars:protostars

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Building detection from sar images using unet deep learning method 5

Building detection from sar images using unet deep learning ...

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5th International Conference on Smart City Applications, SCA 2020

作者： Emek, Recai Alper Demir, Nusret Akdeniz University Institute of Science and Technology Remote Sensing and GIS Graduate Program Antalya07058 Turkey Akdeniz University Faculty of Science Dept. of Space Science and Technologies Antalya07058 Turkey

SAR images are different from the optical images in terms of image properties with the values of scattering instead of reflectance. This makes SAR images difficult to apply the traditional object detection methodologies. In recent years, deep learning models are frequently used in segmentation and object detection purposes. In this study, we have investigated the potential of U-Net models for building detection from SAR and optical image fusion. The datasets used are Sentinel 1 SAR and Sentinel-2 multispectral images, provided from 'spaceNet 6 Multi Sensor All- Weather Mapping' challenge. These images cover an area of 120 km2in Rotterdam, the Netherlands. As training datasets 20 pieces of 900 by 900 pixel sized HV polarized and optical image patches have been used together. The calculated loss value is 0.4 and the accuracy is 81%. © 2020 International Society for Photogrammetry and Remote Sensing. All rights reserved.

关键词： Synthetic aperture radar

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AstroPix: A Pixelated HVCMOS Sensor for space-Based Gamma-Ray Measurement

arXiv

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arXiv 2025年

作者： Steinhebel, Amanda L. Caputo, Regina Violette, Daniel P. Affolder, Anthony Bauman, Autumn Chinatti, Carolyn Deshmukh, Aware Fadayev, Vitaliy Fukazawa, Yasushi Jadhav, Manoj Kierans, Carolyn Kim, Bobae Kim, Jihee Klest, Henry Kroger, Olivia Kumar, Kavic Kushima, Shin Lauenstein, Jean-Marie Leys, Richard Martinez-Mckinney, Forest Metcalfe, Jessica Metzler, Zachary Mitchell, John W. Nakano, Norito Ott, Jennifer Peric, Ivan Perkins, Jeremy S. Rudin, Max R. Shin, Taylor K.W. Sommer, Grant Striebig, Nicolas Suda, Yusuke Tajima, Hiroyasu Valverde, Janeth Zurek, Maria NASA Postdoctoral Program NASA Goddard Space Flight Center MD United States University of California Santa CruzCA United States University of Colorado DenverCO United States NASA Office of STEM Engagement WashingtonDC United States Carleton College Minnesota United States Center for Research and Exploration in Space Science and Technology Maryland United States Physics Program Graduate School of Advanced Science and Engineering Hiroshima University Japan Argonne National Laboratory Illinois United States University of Maryland MD United States Institute for Space-Earth Environmental Research Nagoya University Japan Karlsruher Institut für Technologie Germany Rice University TX United States The George Washington University WashingtonDC United States Kobayashi-Maskawa Institute for the Origin of Particles and the Universe Nagoya University Japan Department of Physics Center for Space Sciences and Technology University of Maryland Baltimore CountyMD United States

A next-generation medium-energy gamma-ray telescope targeting the MeV range would address open questions in astrophysics regarding how extreme conditions accelerate cosmic-ray particles, produce relativistic jet outflows, and more. One concept, AMEGO-X, relies upon the mission-enabling CMOS Monolithic Active Pixel Sensor silicon chip AstroPix. AstroPix is designed for space-based use, featuring low noise, low power consumption, and high scalability. Desired performance of the device include an energy resolution of 5 keV (or 10% FWHM) at 122 keV and a dynamic range per-pixel of 25 − 700 keV, enabled by the addition of a high-voltage bias to each pixel which supports a depletion depth of 500 μm. This work reports on the status of the AstroPix development process with emphasis on the current version under test, version three (v3), and highlights of version two (v2). Version 3 achieves energy resolution of 10.4 ± 3.2% at 59.5 keV and 94 ± 6 μm depletion in a low-resistivity test silicon substrate. © 2025, CC BY.

关键词： Cosmology

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Inner City Problem-Inner City Solution: Remote Sensing, A Critical Tool for Empowering Underserved Communities

Inner City Problem-Inner City Solution: Remote Sensing, A Cr...

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IEEE International Symposium on Geoscience and Remote Sensing (IGARSS)

作者： Reginald Blake Hamidreza Norouzi Marzieh Azarderakhsh Abdou Bah Kip Nielsen Ashley Grey Julia Rivera Provost Office New York City College of Technology New York USA NASA Goddard Institute for Space Studies New York City College of Technology New York USA Construction Management and Civil Engineering Technology Department New York City College of Technology New York USA CUNY Graduate Center New York City College of Technology New York USA Department of Geography & Atmospheric Science New York City College of Technology University of Kansas New York USA Baruch College Campus High School New York City College of Technology New York USA Improving Undergraduate STEM Education Program New York City College of Technology New York USA

ISBN: (数字)9798350360325

ISBN: (纸本)9798350360332

Inner City communities have traditionally been overlooked and often forgotten in the satellite and ground-based remote sensing revolution. For too long, undergraduate minority students from these communities have been marginalized, ostracized, and unprepared to participate in the plethora of remote sensing applications that yet remain new, foreign, and mysterious. Even basic understanding of the amazing tool of remote sensing is unknown to them. These students lack the exposure, the awareness, the understanding, and the engagement in the foray of remote sensing and the unique lens it provides to probe and unearth new ways of gaining knowledge about the environment. To adequately prepare inner-city students to become members of the next generation of geoscientists, to empower and sustain underserved neighborhoods, and to assist in replenishing the geoscience workforce, unique paradigms of teaching and learning about remote sensing are *** the Center for Remote Sensing and Earth System sciences (ReSESS) at the New York City College of technology (City Tech), remote sensing is being used as a catalyst to attract and to engage students from underserved communities in studying urban climate within their local neighborhoods. Results indicate that this approach of using remote sensing to attract students to urban climate increased awareness and understanding in the geosciences, and it motivated students to share their newfound knowledge in environmental sustainability initiatives with their fellow local citizens.

关键词： Satellites Geology Urban areas Green products Education Probes Remote sensing

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A Platform for Monitoring Student Commuting in the Use of School Transport in Smart Cities - A Facial Recognition Based Approach

A Platform for Monitoring Student Commuting in the Use of Sc...

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International Conference on Smart Communications and Networking (SmartNets)

作者： Jessé Da Costa Rocha Marcela Alves de Souza Evelin Helena Silva Cardoso Nandamudi Vijaykumar Jasmine Priscyla Leite de Araújo Renato Lisboa Francês Graduate Program in Electrical Engineering Institute of Technology Federal University of Pará (UFPA) Belém Pará Brazil Information and Communication Technology Center Federal University of the South and Southeast of Para (Unifesspa) Marabá Pará Brazil Department of Computer Science Federal Rural University of the Amazon (UFRA) Capitão Poço Pará Brazil Coordination of Applied Research and Technological Development National Institute for Space Research (INPE) São Paulo Brazil

This article proposes an intelligent platform for monitoring students' steps on their way to school until they leave the school to their homes. This platform can identify students and notify those responsible and competent authorities in various situations of school life, such as: entering and leaving the school bus, entering and leaving school, entering the school cafeteria, etc. The first application aims to control access to the school bus through facial recognition. In the tests carried out, the recognition system achieved excellent results in all metrics.

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Measuring 60-pc-scale Star Formation Rate of the Nearby Seyfert Galaxy NGC 1068 with ALMA, HST, VLT/MUSE, and VLA

arXiv

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arXiv 2024年

作者： Nagashima, Yuzuki Saito, Toshiki Ikarashi, Soh Takano, Shuro Nakanishi, Kouichiro Harada, Nanase Nakajima, Taku Taniguchi, Akio Tosaki, Tomoka Bamba, Kazuharu Physics and Mechatronics Course Major in Symbiotic Systems Science and Technology Graduate School of Symbiotic Systems Science and Technology Fukushima University 1 Kanayagawa Fukushima Fukushima960-1296 Japan National Astronomical Observatory of Japan 2-21-1 Osawa Mitaka Tokyo181-8588 Japan Faculty of Global Interdisciplinary Science and Innovation Shizuoka University 836 Ohya Suruga-ku Shizuoka422-8529 Japan Department of Physics General Studies College of Engineering Nihon University Tamura-machi Fukushima Koriyama963-8642 Japan Astronomical Science Program Graduate Institute for Advanced Studies SOKENDAI 2-21-1 Osawa Mitaka Tokyo181-1855 Japan Institute for Space-Earth Environmental Research Nagoya University Furo-cho Chikusa-ku Aichi Nagoya464-8601 Japan Department of Physics Graduate School of Science Nagoya University Furo-cho Chikusa-ku Aichi Nagoya464-8602 Japan Department of Geoscience Joetsu University of Education Yamayashiki-machi Niigata Joetsu943-8512 Japan

Star formation rate (SFR) is a fundamental parameter for describing galaxies and inferring their evolutionary course. H II regions yield the best measure of instantaneous SFR in galaxies, although the derived SFR can have large uncertainties depending on tracers and assumptions. We present an SFR calibration for the entire molecular gas disk of the nearby Seyfert galaxy NGC 1068, based on our new high-sensitivity ALMA 100 GHz continuum data at 55 pc (= 0′′ . 8) resolution in combination with the HST Paα line data. In this calibration, we account for the spatial variations of dust extinction, electron temperature of H II regions, AGN contamination, and diffuse ionized gas (DIG) based on publicly available multi-wavelength data. Especially, given the extended nature and the possible non-negligible contribution to the total SFR, a careful consideration of DIG is essential. With a cross-calibration between two corrected ionized gas tracers (free-free continuum and Paα), the total SFR of the NGC 1068 disk is estimated to be 3.2 ± 0.5 M☉ yr−1, one-third of the SFR without accounting for DIG (9.1 ± 1.4 M☉ yr−1). We confirmed high SFR around the southern bar-end and the corotation radius, which is consistent with the previous SFR measurements. In addition, our total SFR exceeds the total SFR based on 8 µm dust emission by a factor of 1.5. We attribute this discrepancy to the differences in the young stars at different stages of evolution traced by each tracer and their respective timescales. This study provides an example to address the various uncertainties in conventional SFR measurements and their potential to lead to significant SFR miscalculations. © 2024, CC0.

关键词： Galaxies

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