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Microstructural and Micro-Chemical Evolutions in Irradiated UCO Fuel Kernels of AGR-1 and AGR-2 TRISO Fuel Particles

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Journal of Physics: Conference Series 2021年第1期2048卷

作者： Zhenyu Fu Yong Yang Isabella J. Van Rooyen Subhashish Meher Boopathy Kombaiah Nuclear Engineering Program Department of Materials Science and Engineering University of Florida PO Box 116400 100 Rhines Hall Gainesville FL 32611 USA Fuel Design and Development Department Idaho National Laboratory Idaho Falls ID 83415-6188 USA Material Science Department Idaho National Laboratory Idaho Falls ID 83415-6188 USA Advanced Characterization Department Idaho National Laboratory Idaho Falls ID 83415-6188 USA

AGR-1 and AGR-2 tristructural-isotropic (TRISO) fuel particles were fabricated using slightly different fuel kernel chemical compositions, modified fabrication processes, different fuel kernel diameters, and changed 235U enrichments. Extensive microstructural and analytical characterizations were conducted to correlate those differences with the fuel kernels' responses to neutron irradiations in terms of irradiated fuel microstructure, fission products' chemical and physical states, and fission gas bubble evolutions. The studies used state-of-the-art transmission electron microscopy (TEM) equipped with energy-dispersive x-ray spectroscopy (EDS) via four silicon solid-state detectors with super sensitivity and rapid speed. The TEM specimens were prepared from selected AGR-1 and AGR-2 irradiated fuel kernels exposed to safety testing after irradiation. The particles were chosen in order to create representative irradiation conditions with fuel burnup in the range of 10.8 to 18.6% fissions per initial metal atom (FIMA) and time-average volume-average temperatures varying from 1070 to 1287°C. The 235U enrichment was 19.74 wt.% and 14.03 wt.% for the AGR-1 and AGR-2 fuel kernels, respectively. The TEM results showed significant microstructural reconstructions in the irradiated fuel kernels from both the AGR-1 and AGR-2 fuels. There are four major phases: fuel matrix of UO2 and UC, U2RuC2, and UMoC2—in the irradiated AGR-2 fuel kernel. Zr and Nd form a solid solution in the UC phase. The UMoC2 phase often features a detectable concentration of Tc. Pd was mainly found to be located in the buffer layer or associated with fission gas bubbles within the UMoC2 phase. EDS maps qualitatively show that rare-earth fission products (Nd et al.) preferentially reside in the UO2 phase. In contrast, in the irradiated AGR-1 fuel kernel, no U2RuC2 or UMoC2 precipitates were positively identified. Instead, there was a high number of rod-shaped precipitates enriched with Ru, Tc, Rh, and Pd

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Stable isotope analysis of western Lake Superior predatory fishes, part two: prey source contributions

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Journal of Great Lakes Research 2025年

作者： Jessica Hanson Morgann Gordon Nick Peterson Ryan Lepak Cory Goldsworthy Valerie Brady Thomas Hrabik Joel Hoffman University of Minnesota Duluth Swenson College of Science and Engineering Integrated Biological Sciences Master’s Program 1035 Kirby Drive Duluth MN 55812 USA Oak Ridge Associated Universities U.S. EPA Office of Research and Development Center for Computational Toxicology and Exposure Great Lakes Toxicology and Ecology Division 6201 Congdon Blvd Duluth MN 55804 USA Minnesota Department of Natural Resources Lake Superior Areas Fisheries 5351 North Shore Drive Duluth MN 55804 USA U.S. Environmental Protection Agency Center for Computational Toxicology and Exposure Great Lakes Toxicology and Ecology Division 6201 Congdon Blvd. Duluth MN 55804 USA Natural Resources Research Institute 5013 Miller Trunk Hwy Hermantown MN 55811 USA University of Minnesota Duluth Swenson College of Science and Engineering 1035 Kirby Drive Duluth MN 55812 USA

Niche partitioning of time, space, or resources facilitates the coexistence of competitor species. The Lake Superior food web includes several piscivores that are important to fisheries, including native lake trout ( Salvelinus namaycush, both lean and siscowet morphotypes) and walleye ( Sander vitreus ), and introduced Chinook salmon ( Oncorhynchus tshawytscha ), coho salmon ( Oncorhynchus kisutch ), pink salmon ( Oncorhynchus gorbuscha ), brown trout ( Salmo trutta ), and rainbow trout ( Oncorhynchus mykiss ). Here we quantify specific prey source contributions to these predators in the western arm of Lake Superior using dual stable isotope mixing models based on carbon and nitrogen stable isotope ratios. For each species, three mixing models were constructed to examine predator size effect: one with all fish sampled, one with the 10 smallest fish sampled, and one with the 10 largest fish sampled. We found that native and introduced species had distinct diets from one another; siscowet lake trout primarily relied on burbot ( Lota lota ) and invasive rainbow smelt ( Osmerus mordax ), native lean lake trout and walleye both relied on invasive rainbow smelt, and introduced salmonids relied on native invertebrates Mysis diluviana and Diporeia spp. Additionally, siscowet lake trout, lean lake trout, Chinook salmon, and coho salmon exhibited size-based shifts in prey contributions. The low piscivory in introduced salmonids and high reliance of native predators on invasive rainbow smelt is likely due to low abundance of cisco ( Coregonus artedi ). Our study reveals complex, potentially adaptive responses of both native and introduced nearshore predators to both native and invasive prey resources in Lake Superior.

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Author Correction: Single-cell transcriptomics uncovers EGFR signaling-mediated gastric progenitor cell differentiation in stomach homeostasis

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Nature communications 2023年第1期14卷 6540页

作者： Hitomi Takada Yohei Sasagawa Mika Yoshimura Kaori Tanaka Yoshimi Iwayama Tetsutaro Hayashi Ayako Isomura-Matoba Itoshi Nikaido Akira Kurisaki Laboratory of Stem Cell Technologies Graduate School of Science and Technology Nara Institute of Science and Technology Takayama-cho Ikoma Nara Japan. Laboratory for Bioinformatics Research RIKEN Center for Biosystems Dynamics Research Wako Saitama Japan. Department of Functional Genome Informatics Biological Data Science Medical Research Institute Tokyo Medical and Dental University Bunkyo Tokyo Japan. Laboratory for Bioinformatics Research RIKEN Center for Biosystems Dynamics Research Wako Saitama Japan. itoshi.nikaido@riken.jp. Department of Functional Genome Informatics Biological Data Science Medical Research Institute Tokyo Medical and Dental University Bunkyo Tokyo Japan. itoshi.nikaido@riken.jp. Master's/Doctoral Program in Life Science Innovation (Bioinformatics) Degree Programs in Systems and Information Engineering Graduate School of Science and Technology University of Tsukuba Tsukuba Ibaraki Japan. itoshi.nikaido@riken.jp. Laboratory of Stem Cell Technologies Graduate School of Science and Technology Nara Institute of Science and Technology Takayama-cho Ikoma Nara Japan. akikuri@bs.naist.jp.

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Detection of the 2021 Outburst of RS Ophiuchi with the LST-1

arXiv

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arXiv 2023年

作者： Kobayashi, Yukiho Aguasca-Cabot, Arnau Martín, María Isabel Bernardos Green, David López-Coto, Rubén Abe, K. Abe, S. Aguasca-Cabot, A. Agudo, I. Alvarez Crespo, N. Antonelli, L.A. Aramo, C. Arbet-Engels, A. Arcaro, C. Artero, M. Asano, K. Aubert, P. Baktash, A. Bamba, A. Baquero Larriva, A. Baroncelli, L. Barres de Almeida, U. Barrio, J.A. Batkovic, I. Baxter, J. Becerra González, J. Bernardini, E. Bernardos, M.I. Bernete Medrano, J. Berti, A. Bhattacharjee, P. Biederbeck, N. Bigongiari, C. Bissaldi, E. Blanch, O. Bonnoli, G. Bordas, P. Bulgarelli, A. Burelli, I. Burmistrov, L. Buscemi, M. Cardillo, M. Caroff, S. Carosi, A. Carrasco, M.S. Cassol, F. Cauz, D. Cerasole, D. Ceribella, G. Chai, Y. Cheng, K. Chiavassa, A. Chikawa, M. Chytka, L. Cifuentes, A. Contreras, J.L. Cortina, J. Costantini, H. Dalchenko, M. Dazzi, F. De Angelis, A. de Bony de Lavergne, M. De Lotto, B. De Lucia, M. de Menezes, R. Del Peral, L. Deleglise, G. Delgado, C. Delgado Mengual, J. della Volpe, D. Dellaiera, M. Di Piano, A. Di Pierro, F. Di Pilato, A. Di Tria, R. Di Venere, L. Díaz, C. Dominik, R.M. Dominis Prester, D. Donini, A. Dorner, D. Doro, M. Eisenberger, L. Elsässer, D. Emery, G. Escudero, J. Fallah Ramazani, V. Ferrara, G. Ferrarotto, F. Fiasson, A. Foffano, L. Freixas Coromina, L. Fröse, S. Fukami, S. Fukazawa, Y. Garcia, E. Garcia López, R. Gasbarra, C. Gasparrini, D. Geyer, D. Giesbrecht Paiva, J. Giglietto, N. Giordano, F. Gliwny, P. Godinovic, N. Grau, R. Green, J. Green, D. Gunji, S. Günther, P. Hackfeld, J. Hadasch, D. Hahn, A. Hashiyama, K. Hassan, T. Hayashi, K. Heckmann, L. Heller, M. Herrera Llorente, J. Hirotani, K. Hoffmann, D. Horns, D. Houles, J. Hrabovsky, M. Hrupec, D. Hui, D. Hütten, M. Iarlori, M. Imazawa, R. Inada, T. Inome, Y. Ioka, K. Iori, M. Ishio, K. Jimenez Martinez, I. Jurysek, J. Kagaya, M. Karas, V. Katagiri, H. Kataoka, J. Kerszberg, D. Kobayashi, Y. Kohri, K. Kong, A. Kubo, H. Kushida, J. Lainez, M. Lamanna, G. Lamastra, A. Le Flour, T. Linhoff, M. Institute for Cosmic Ray Research The University of Tokyo 5-1-5 Kashiwa-no-ha Chiba Kashiwa277-8582 Japan Departament de Física Quàntica i Astrofísica Institut de Ciències del Cosmos Universitat de Barcelona IEEC-UB Martí i Franquès 1 Barcelona08028 Spain Instituto de Astrofísica de Andalucía-CSIC Glorieta de la Astronomía s/n Granada18008 Spain Max-Planck-Institut für Physik Föhringer Ring 6 München80805 Germany Department of Physics Tokai University Japan Institute for Cosmic Ray Research University of Tokyo Japan Departament de Física Quàntica i Astrofísica Institut de Ciències del Cosmos Universitat de Barcelona IEEC-UB Spain Instituto de Astrofísica de Andalucía-CSIC Spain EMFTEL department IPARCOS Universidad Complutense de Madrid Spain INAF - Osservatorio Astronomico di Roma Italy INFN Sezione di Napoli Italy Max-Planck-Institut für Physik Germany INFN Sezione di Padova Università degli Studi di Padova Italy The Barcelona Institute of Science and Technology Spain LAPP Univ. Grenoble Alpes Univ. Savoie Mont Blanc CNRS-IN2P3 Annecy France Universität Hamburg Institut für Experimentalphysik Germany Graduate School of Science University of Tokyo Japan Universidad del Azuay Ecuador INAF - Osservatorio di Astrofisica e Scienza dello Spazio di Bologna Italy Centro Brasileiro de Pesquisas Físicas Brazil Instituto de Astrofísica de Canarias Departamento de Astrofísica Universidad de La Laguna Spain CIEMAT Spain Department of Physics TU Dortmund University Germany INFN Sezione di Bari Politecnico di Bari Italy INAF - Osservatorio Astronomico di Brera Italy INFN Sezione di Trieste Università degli Studi di Udine Italy University of Geneva Département de Physique Nucléaire et Corpusculaire Switzerland INFN Sezione di Catania Italy Italy Aix Marseille Univ CNRS IN2P3 CPPM France INFN Sezione di Bari Università di Bari Italy INFN Sezione di Torino Italy Palacky University Olomouc Faculty of Science United States University of Alcalá UAH Spa

Novae are luminous explosions in close binaries which host a white dwarf and a companion donor star. They are triggered by a thermonuclear runaway when the white dwarf accretes a critical amount of matter from the secondary. Though novae are established as high-energy gamma-ray emitters through observations by the Fermi Large Area Telescope (LAT), the origin of the gamma-ray emission, whether it is hadronic or leptonic, had been under intense debate until very recently. RS Ophiuchi (RS Oph) is a well-known recurrent symbiotic nova with a recurrence time scale of 15 years. The most recent outburst of RS Oph in 2021 brought the first detection of very-high-energy (VHE) gamma rays from a nova ever. The first Large-Sized Telescope prototype (LST-1) of the Cherenkov Telescope Array observed this historic event along with H.E.S.S. and MAGIC. The LST-1 observations in the first days after the burst onset show a clear VHE gamma-ray signal from RS Oph. The low energy threshold of LST-1 allows us to reconstruct the RS Oph gamma-ray spectrum down to ∼30 GeV, providing the best connection of the VHE gamma-ray data to the Fermi LAT energy range. The results from the analysis of the LST-1 observations are consistent with those obtained with H.E.S.S. and MAGIC, and also support a hadronic origin for the observed gamma-ray fluxes. In this contribution, we will present the analysis results of the LST-1 observations of the 2021 outburst of RS Oph. © 2023, CC BY.

关键词： Telescopes

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Core Collapse Supernova Gravitational Wave Emission for Progenitors of 9.6, 15, and 25 M☉

arXiv

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arXiv 2022年

作者： Mezzacappa, Anthony Marronetti, Pedro Landfield, Ryan E. Lentz, Eric J. Hix, W. Raphael Harris, J. Austin Bruenn, Stephen W. Blondin, John M. Messer, O.E. Bronson Casanova, Jordi Kronzer, Luke L. Department of Physics and Astronomy University of Tennessee 1408 Circle Drive KnoxvilleTN37996-1200 United States Physics Division National Science Foundation AlexandriaVA22314 United States National Center for Computational Sciences Oak Ridge National Laboratory P.O. Box 2008 Oak RidgeTN37831-6164 United States Physics Division Oak Ridge National Laboratory P.O. Box 2008 Oak RidgeTN37831-6354 United States Joint Institute for Nuclear Physics and its Applications Oak Ridge National Laboratory P.O. Box 2008 Oak RidgeTN37831-6374 United States Department of Physics Florida Atlantic University 777 Glades Road Boca RatonFL33431-0991 United States Department of Physics North Carolina State University RaleighNC27695-8202 United States Physics Program Community College of Denver P.O. Box 173363 DenverCO80217-3363 United States Department of Aerospace Engineering and Mechanics University of Alabama Box 870280 TuscaloosaAL35487-0280 United States

We present gravitational wave emission predictions based on three core collapse supernova simulations corresponding to three different progenitor masses. The masses span a large range, between 9.6 and 25 M☉ , are all initially non-rotating, and are of two metallicities: zero and Solar. We compute both the temporal evolution of the gravitational wave strains for both the plus and the cross polarizations, as well as their spectral decomposition and characteristic strains. The temporal evolution of our zero metallicity, 9.6 M☉ progenitor model is distinct from the temporal evolution of our Solar metallicity, 15 M☉ progenitor model and our zero metallicity, 25 M☉ progenitor model. In the former case, the high-frequency gravitational wave emission is largely confined to a brief time period ∼75 ms after bounce, whereas in the latter two cases, high-frequency emission does not commence until ∼125 ms after bounce or later. Nonetheless, the physical origin of the high-frequency emission in all three cases corresponds to convection in the proto-neutron star of both Schwarzschild and Ledoux type, and convective overshoot. The low-frequency emission in all three models exhibits very similar behavior. At frequencies below ∼250 Hz, gravitational waves are emitted by neutrino-driven convection and the SASI. This emission extends throughout the simulations when a gain region is present. In all three models, explosion is observed, at ∼125, ∼500, and ∼250 ms after bounce in the 9.6, 15, and 25 M☉ progenitor models, respectively. At these times, the low-frequency gravitational wave emission is joined by very low frequency emission, below ∼10 Hz. These very low frequency episodes are the result of explosion and begin at the above designated explosion times in each of our models. Our characteristic strains tell us that in principle all three gravitational wave signals would be detectable by current-generation detectors for a supernova at a distance of 10 kpc. However, our 9.6 M☉ progeni

关键词： Strain

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Prevention Structured Query Language Injection Using Regular Expression and Escape String

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Procedia Computer science 2018年 135卷 678-687页

作者： Benfano Soewito Fergyanto E. Gunawan Hirzi Frumentius Computer Science Department BINUS Graduate Program - Master of Computer Science Bina Nusantara University Jakarta Indonesia 11480 Industrial Engineering Department BINUS Graduate Program - Master of Industrial Engineering Bina Nusantara University Jakarta Indonesia 11480 Investment Coordinating Board of the Republic of Indonesia Jakarta Indonesia 12190

Information technology enables for new way of commerce, which is a commerce activities through online media (e-commerce). Security becomes an important issue in online-system, because such system is accessible by anyone through the global network -internet. Security in terms of confidentiality, integrity, and availability becomes goals that must be achieved by any system generally, and commerce system especially, because this kind of system contains many sensitive data like customer data and transaction data. SQL Injection is a vulnerability and threat, with the most occurrence in a web based system. In this research we evaluate and analyze source code against SQL injection, and we use regular expression and escape string to prevent the SQL injection. The results of this study are findings of system vulnerability against SQL injection, which are proven by the ability to get data from database, with SQL injection techniques. System vulnerabilities were analyzed, in order to design and implement the solution for it. The solutions then tested, to validate that it has proven effectively fix the vulnerabilities, and can prevent the exploitation by SQL injection. In the end, the conclusion is that initially the system is vulnerable against SQL injection, but then the solution that being implemented has proven effectively fix the issue.

关键词： SQL Injection regular expression escape string e-commerce vulnerability

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Characteristics of Flood Water Level Based on Hydrologic Soil Group Analysis in Temef Watershed

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IOP Conference Series: Earth and Environmental science 2020年第1期437卷

作者： D. Frangky B. Welkis Ferry Moun Iki Lobo Denik Sri Krisnayanti Water Resources Engineering Department Faculty of Engineering Universitas Brawijaya Malang 65145 Indonesia Alumnus of Master's Program of Environmental Science Nusa Cendana University Kupang 85001 Indonesia Department of Civil Engineering Nusa Cendana University Kupang 85001 Indonesia

Temef Watershed is located in the Benanain River Basin with a catchment area of 551.50 km2. River characteristics in the Temef Watershed are influenced by three main river streams from upstream to downstream. Conventional collection of data on watershed characteristics requires a relatively long process and time. However, when based on Geographic Information Systems (GIS), the cost and time will be more efficient. The floodwater level is affected by the amount of rainwater runoff that occurs in the Temef Watershed. The amount of runoff depends on the level of soil permeability and land cover. To determine the level of soil permeability, hydrogeological maps are used. Based on this, a study of the characteristics of flood waters from GIS-based hydrogeology is needed. The analysis method used ArcGIS overlay on hydrogeological maps, while data on watershed characteristics used the Archydro and HEC-GeoHMS features. The results of the analysis showed a level 3 permeability type with limestone lithology, solid volcanic breccia, sandy marlene, conglomerate, and alluvium consisting of sand and gravel having moderate to high permeability. The metamorphic and basalt rocks have low to moderate permeability and the scaly clay has low to very low permeability. This condition causes runoff that turn into flood streams.

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Analysis of Urban Forest Needs as Anthropogenic (CO2) Gas Absorbent in Semarang City 2

Analysis of Urban Forest Needs as Anthropogenic (CO2) Gas Ab...

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2nd International Conference on Energy, Environmental and Information System, ICENIS 2017

作者： Febriani, Anisa Putri Soeprobowati, Tri Retnaningsih Maryono, Maryono Master Program of Environmental Science School of Postg. Stu. Diponegoro University Semarang Indonesia Departemen Biology Faculty of Science and Mathematic Diponegoro University Semarang Indonesia Department Urban and Regional Planning Faculty Engineering Diponegoro University Semarang Indonesia

Green open space in cities in significant needs to maintenance environment quality. On of the critical function is to absorb increasing number of gas CO2. Therefore, developing urban forest in cities is very importance. The objective of the study is to determine the area of urban forest as CO2 gas anthropogenic absorb which is formed from fuel, diesel fuel, liquid petroleum gas. The study consists of (1) Analyzing the number of CO2 gas emission by calculating the needs of petroleum and gas based on the number of population, (2) Analyzing the power of gas absorption, (3) Measuring the air concentration of CO2 gas ambient based on daily traffic activities. This study shown that from year 2013 to year 2017, the increasing of urban forest is not so significant. For year 2013 the green open space in Semarang City are 373.67 hectares (7.5 percent from Semarang City area), consists of 239 parks, 11 public cemeteries, production forests, community forests, and urban forests, however the area of urban forest is not increase. The study assess that Antidesmabunius is one of the green species which high absorb capacity planted for Semarang. This trees produce 31,31 ton annually. This study proposed to fostering Antidesmabunius as one principle threes in Semarang urban forest. © 2018 The Authors, published by EDP sciences.

关键词： Carbon dioxide

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Modeling of human body movement on personal mobility interface using LIDAR 1

Modeling of human body movement on personal mobility interfa...

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1st IEEE International Conference on Industrial Cyber-Physical Systems, ICPS 2018

作者： Yokota, Sho Hashimoto, Hiroshi Chugo, Daisuke Matsumoto, Akihiro Department. of Mechanical Engineering Toyo University Saitama Japan Master Program of Innovation for Design and Eng. Advanced Institute of Industiral Technology Tokyo Japan School of Science and Technology Kwansei Gakuin University Sanda Japan

ISBN: (纸本)9781538665312

This paper proposes the contactless measurement scheme using LIDAR (Light Detection And Ranging) and the modeling human body movment for the personal mobility interface including twisting motion. We have already proposed the saddle type human body motion interface. This interface uses not only conventional translational human motions but also twisting motion, namely it makes full use of the human motion characteristics. The mechanism of the interface consists of the saddle and universal joint connecting the saddle and personal mobility, and tracing loins motion. Due to these features, the proposed interface shows a potential to realize intuitive operation in the basic experiment. However, the problems have also remained: The height of the saddle should be adjuested for the users' height before riding on the PMV (Personal Mobility Vehicle). And there are plays between the saddle and buttocks of the user, and backlash of the saddle mechanism. This problem prevents a small human motion from measurment. This paper, therefore, proposes the contactless measurement using LIDAR and discusses the fitting methods from measured data points to human body movement. © 2018 IEEE.

关键词： Optical radar

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Derivative Free Levenberg-Marquardt Method for Solving Fuzzy Nonlinear Equation

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IOP Conference Series: Materials science and engineering 2021年第1期1115卷

作者： A U Omesa I M Sulaiman M Mamat M Y Waziri A Shadi M A Zaini Kalfin I Sumiati Department of Mathematics College of Agriculture Zuru Kebbi Nigeria Faculty of Informatics and Computing Universiti Sultan Zainal Abidin Campus Kuala Nerus 22200 Terengganu Malaysia Department of Mathematics Bayero University Kano Nigeria Institute of Engineering Mathematics Universiti Malaysia Perlis Kangar Malaysia Doctor Program of Mathematics Faculty of Mathematics and Natural Sciences Universitas Padjadjaran Indonesia Master Program in Mathematics Faculty of Mathematics and Natural Science Universitas Padjadjaran Indonesia

In this paper, we present a derivative-free computational method for solving fuzzy nonlinear equation. Derivative-free technique avoids computing the derivative by generating an estimate to the derivative. This is made possible by inserting the estimate of in Levenberg-Marquardt's method. Numerical experiments are carried out which shows that, the method is efficient.

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