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1. Horizons: Nuclear Astrophysics in the 2020s and Beyond

Author

Schatz, H., Reyes, A. D. Becerril, Best, A., Brown, E. F., Chatziioannou, K., Chipps, K. A., Deibel, C. M., Ezzeddine, R., Galloway, D. K., Hansen, C. J., Herwig, F., Ji, A. P., Lugaro, M., Meisel, Z., Norman, D., Read, J. S., Roberts, L. F., Spyrou, A., Tews, I., Timmes, F. X., Travaglio, C., Vassh, N., Abia, C., Adsley, P., Agarwal, S., Aliotta, M., Aoki, W., Arcones, A., Aryan, A., Bandyopadhyay, A., Banu, A., Bardayan, D. W., Barnes, J., Bauswein, A., Beers, T. C., Bishop, J., Boztepe, T., Côté, B., Caplan, M. E., Champagne, A. E., Clark, J. A., Couder, M., Couture, A., de Mink, S. E., Debnath, S., deBoer, R. J., Hartogh, J. den, Denissenkov, P., Dexheimer, V., Dillmann, I., Escher, J. E., Famiano, M. A., Farmer, R., Fisher, R., Fröhlich, C., Frebel, A., Fryer, C., Fuller, G., Ganguly, A. K., Ghosh, S., Gibson, B. K., Gorda, T., Gourgouliatos, K. N., Graber, V., Gupta, M., Haxton, W., Heger, A., Hix, W. R., Ho, W C. G., Holmbeck, E. M., Hood, A. A., Huth, S., Imbriani, G., Izzard, R. G., Jain, R., Jayatissa, H., Johnston, Z., Kajino, T., Kankainen, A., Kiss, G. G., Kwiatkowski, A., La Cognata, M., Laird, A. M., Lamia, L., Landry, P., Laplace, E., Launey, K. D., Leahy, D., Leckenby, G., Lennarz, A., Longfellow, B., Lovell, A. E., Lynch, W. G., Lyons, S. M., Maeda, K., Masha, E., Matei, C., Merc, J., Messer, B., Montes, F., Mukherjee, A., Mumpower, M., Neto, D., Nevins, B., Newton, W. G., Nguyen, L. Q., Nishikawa, K., Nishimura, N., Nunes, F. M., O'Connor, E., O'Shea, B. W., Ong, W-J., Pain, S. D., Pajkos, M. A., Pignatari, M., Pizzone, R. G., Placco, V. M., Plewa, T., Pritychenko, B., Psaltis, A., Puentes, D., Qian, Y-Z., Radice, D., Rapagnani, D., Rebeiro, B. M., Reifarth, R., Richard, A. L., Rijal, N., Roederer, I. U., Rojo, J. S., K, J. S, Saito, Y., Schwenk, A., Sergi, M. L., Sidhu, R. S., Simon, A., Sivarani, T., Skúladóttir, Á., Smith, M. S., Spiridon, A., Sprouse, T. M., Starrfield, S., Steiner, A. W., Strieder, F., Sultana, I., Surman, R., Szücs, T., Tawfik, A., Thielemann, F., Trache, L., Trappitsch, R., Tsang, M. B., Tumino, A., Upadhyayula, S., Martínez, J. O. Valle, Van der Swaelmen, M., Vázquez, C. Viscasillas, Watts, A., Wehmeyer, B., Wiescher, M., Wrede, C., Yoon, J., Zegers, R G. T., Zermane, M. A., and Zingale, M.

Subjects
Nuclear Experiment, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Solar and Stellar Astrophysics, Nuclear Theory
Abstract

Nuclear Astrophysics is a field at the intersection of nuclear physics and astrophysics, which seeks to understand the nuclear engines of astronomical objects and the origin of the chemical elements. This white paper summarizes progress and status of the field, the new open questions that have emerged, and the tremendous scientific opportunities that have opened up with major advances in capabilities across an ever growing number of disciplines and subfields that need to be integrated. We take a holistic view of the field discussing the unique challenges and opportunities in nuclear astrophysics in regards to science, diversity, education, and the interdisciplinarity and breadth of the field. Clearly nuclear astrophysics is a dynamic field with a bright future that is entering a new era of discovery opportunities., Comment: 96 pages. Submitted to Journal of Physics G

Published
2022
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2. Application Experiences on a GPU-Accelerated Arm-based HPC Testbed

Author

(0000-0003-0554-1036) Elwasif, W., (0000-0002-2590-5178) Godoy, W., Hagerty, N., (0000-0003-3023-7140) Harris, J. A., (0000-0002-5380-6951) Hernandez, O., (0000-0002-4229-7960) Joo, B., (0000-0001-5539-4017) Kent, P., (0000-0003-1952-7219) Lebrun-Grandie, D., Maccarthy, E., (0000-0002-4333-4145) Melesse Vergara, V. G., (0000-0002-5358-5415) Messer, B., Miller, R., (0000-0001-8745-7078) Oral, S., (0000-0003-3396-6154) Bastrakov, S., (0000-0002-8258-3881) Bussmann, M., (0000-0002-3844-3697) Debus, A., (0000-0001-8965-1149) Steiniger, K., (0000-0001-7839-4386) Stephan, J., (0000-0003-1642-0459) Widera, R., (0000-0003-1750-7265) Bryngelson, S. H., (0000-0002-4781-9502) Le Berre, H., Radhakrishnan, A., (0000-0001-9841-4057) Young, J., (0000-0002-3560-9428) Chandrasekaran, S., (0000-0002-2773-4499) Ciorba, F., Simsek, O., (0000-0001-5211-2002) Clark, K., (0000-0003-1448-5304) Spiga, F., (0000-0003-3181-8190) Hammond, J., (0000-0001-7215-762X) Stone, J. E., (0000-0001-8533-1367) Hardy, D., Keller, S., (0000-0002-2549-9587) Piccinali, J.-G., (0000-0003-0661-5594) Trott, C., (0000-0003-0554-1036) Elwasif, W., (0000-0002-2590-5178) Godoy, W., Hagerty, N., (0000-0003-3023-7140) Harris, J. A., (0000-0002-5380-6951) Hernandez, O., (0000-0002-4229-7960) Joo, B., (0000-0001-5539-4017) Kent, P., (0000-0003-1952-7219) Lebrun-Grandie, D., Maccarthy, E., (0000-0002-4333-4145) Melesse Vergara, V. G., (0000-0002-5358-5415) Messer, B., Miller, R., (0000-0001-8745-7078) Oral, S., (0000-0003-3396-6154) Bastrakov, S., (0000-0002-8258-3881) Bussmann, M., (0000-0002-3844-3697) Debus, A., (0000-0001-8965-1149) Steiniger, K., (0000-0001-7839-4386) Stephan, J., (0000-0003-1642-0459) Widera, R., (0000-0003-1750-7265) Bryngelson, S. H., (0000-0002-4781-9502) Le Berre, H., Radhakrishnan, A., (0000-0001-9841-4057) Young, J., (0000-0002-3560-9428) Chandrasekaran, S., (0000-0002-2773-4499) Ciorba, F., Simsek, O., (0000-0001-5211-2002) Clark, K., (0000-0003-1448-5304) Spiga, F., (0000-0003-3181-8190) Hammond, J., (0000-0001-7215-762X) Stone, J. E., (0000-0001-8533-1367) Hardy, D., Keller, S., (0000-0002-2549-9587) Piccinali, J.-G., and (0000-0003-0661-5594) Trott, C.

Abstract

This paper assesses and reports the experience of ten teams working to port,validate, and benchmark several High Performance Computing applications on a novel GPU-accelerated Arm testbed system. The testbed consists of eight NVIDIA Arm HPC Developer Kit systems built by GIGABYTE, each one equipped with a server-class Arm CPU from Ampere Computing and A100 data center GPU from NVIDIA Corp. The systems are connected together using Infiniband high-bandwidth low-latency interconnect. The selected applications and mini-apps are written using several programming languages and use multiple accelerator-based programming models for GPUs such as CUDA, OpenACC, and OpenMP offloading. Working on application porting requires a robust and easy-to-access programming environment, including a variety of compilers and optimized scientific libraries. The goal of this work is to evaluate platform readiness and assess the effort required from developers to deploy well-established scientific workloads on current and future generation Arm-based GPU-accelerated HPC systems. The reported case studies demonstrate that the current level of maturity and diversity of software and tools is already adequate for large-scale production deployments.

Published
2023

13. The Next Generation Global Gravitational Wave Observatory: The Science Book

Author

Kalogera, V., Sathyaprakash, B., Bailes, M., Bizouard, M., Buonanno, A., Burrows, A., Colpi, M., Evans, M., Fairhurst, S., Hild, S., Kasliwal, M., Lehner, L., Mandel, I., Mandic, V., Nissanke, S., Papa, M., Reddy, S., Rosswog, S., Broeck, C., Ajith, P., Anand, S., Andreoni, I., Arun, K., Barausse, E., Baryakhtar, M., Belgacem, E., Berry, C., Bertacca, D., Brito, R., Caprini, C., Chatziioannou, K., Coughlin, M., Cusin, G., Dietrich, T., Dirian, Y., East, W., Fan, X., Figueroa, D., Foffa, S., Ghosh, A., Hall, E., Harms, J., Harry, I., Hinderer, T., Janka, T., Justham, S., Kasen, D., Kotake, K., Lovelace, G., Maggiore, M., Mangiagli, A., Mapelli, M., Maselli, A., Matas, A., McIver, J., Messer, B., Mezzacappa, T., Mills, C., Mueller, B., Müller, E., Pürrer, M., Pani, P., Pratten, G., Regimbau, T., Sakellariadou, M., Schneider, R., Sesana, A., Shao, L., Sotiriou, P., Tamanini, N., Tauris, T., Thrane, E., Valiante, R., van de Meent, M., Varma, V., Vines, J., Vitale, S., Yang, H., Yunes, N., Zumalacarregui, M., Punturo, M., Reitze, D., Couvares, P., Katsanevas, S., Kajita, T., Lück, H., McClelland, D., Rowan, S., Sanders, G., Shoemaker, D., and Brand, J.

Abstract

The next generation of ground-based gravitational-wave detectors will observe coalescences of black holes and neutron stars throughout the cosmos, thousands of them with exceptional fidelity. The Science Book is the result of a 3-year effort to study the science capabilities of networks of next generation detectors. Such networks would make it possible to address unsolved problems in numerous areas of physics and astronomy, from Cosmology to Beyond the Standard Model of particle physics, and how they could provide insights into workings of strongly gravitating systems, astrophysics of compact objects and the nature of dense matter. It is inevitable that observatories of such depth and finesse will make new discoveries inaccessible to other windows of observation. In addition to laying out the rich science potential of the next generation of detectors, this report provides specific science targets in five different areas in physics and astronomy and the sensitivity requirements to accomplish those science goals. This report is the second in a six part series of reports by the GWIC 3G Subcommittee: i) Expanding the Reach of Gravitational Wave Observatories to the Edge of the Universe, ii) The Next Generation Global Gravitational Wave Observatory: The Science Book (this report), iii) 3G R&D: R&D for the Next Generation of Ground-based Gravitational Wave Detectors, iv) Gravitational Wave Data Analysis: Computing Challenges in the 3G Era, v) Future Ground-based Gravitational-wave Observatories: Synergies with Other Scientific Communities, and vi) An Exploration of Possible Governance Models for the Future Global Gravitational-Wave Observatory Network.

Published
2021

21. White paper on nuclear astrophysics and low energy nuclear physics Part 1: Nuclear astrophysics

Author

Rehm, E., Escher, J.E., Fröhlich, C., Chieffi, A., Stairs, I.H., Rutledge, R.E., Arcones, A., Rogachev, G., Meyer, B.S., Zegers, R.G.T., Mezzacappa, A., Bardayan, D.W., Brown, E.F., Bernstein, L.A., Nunes, F., Messer, B., Couture, A.J., Brune, C.R., Fields, B.D., Herwig, F., Steiner, A.W., Blackmon, J.C., Zingale, M., Danielewicz, P., Townsley, D.M., Smith, M.S., Reddy, S., O'Shea, B.W., Iliadis, C., Timmes, F.X., Diehl, R., McLaughlin, G.C., Wiescher, M., Brown, B.A., Pritychenko, B., Hix, W.R., Prakash, M., Strohmayer, T.E., El-Eid, M., Lynch, W.G., Champagne, A.E., Schatz, H., and Beers, T.C.

Abstract

This white paper informs the nuclear astrophysics community and funding agencies about the scientific directions and priorities of the field and provides input from this community for the 2015 Nuclear Science Long Range Plan. It summarizes the outcome of the nuclear astrophysics town meeting that was held on August 21–23, 2014 in College Station at the campus of Texas A&M University in preparation of the NSAC Nuclear Science Long Range Plan. It also reflects the outcome of an earlier town meeting of the nuclear astrophysics community organized by the Joint Institute for Nuclear Astrophysics (JINA) on October 9–10, 2012 Detroit, Michigan, with the purpose of developing a vision for nuclear astrophysics in light of the recent NRC decadal surveys in nuclear physics (NP2010) and astronomy (ASTRO2010). The white paper is furthermore informed by the town meeting of the Association of Research at University Nuclear Accelerators (ARUNA) that took place at the University of Notre Dame on June 12–13, 2014. In summary we find that nuclear astrophysics is a modern and vibrant field addressing fundamental science questions at the intersection of nuclear physics and astrophysics. These questions relate to the origin of the elements, the nuclear engines that drive life and death of stars, and the properties of dense matter. A broad range of nuclear accelerator facilities, astronomical observatories, theory efforts, and computational capabilities are needed. With the developments outlined in this white paper, answers to long standing key questions are well within reach in the coming decade.

Published
2017
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25. Snowmass Computing Frontier: Computing for the Cosmic Frontier, Astrophysics, and Cosmology

Author

Connolly, A, Habib, S, Szalay, A, Borrill, J, Fuller, G, Gnedin, N, Heitmann, K, Jacobs, D, Lamb, D, Mezzacappa, T, Messer, B, Myers, S, Nord, B, Nugent, P, O'Shea, B, Ricker, P, Schneider, M, Connolly, A, Habib, S, Szalay, A, Borrill, J, Fuller, G, Gnedin, N, Heitmann, K, Jacobs, D, Lamb, D, Mezzacappa, T, Messer, B, Myers, S, Nord, B, Nugent, P, O'Shea, B, Ricker, P, and Schneider, M

Abstract

This document presents (off-line) computing requrements and challenges for Cosmic Frontier science, covering the areas of data management, analysis, and simulations. We invite contributions to extend the range of covered topics and to enhance the current descriptions.

Published
2017

26. Contributors

Author

Ackland, Gareth L., Annane, Dijillali, Asfar, Pierre, Augoustides, John G., Aya, Hollman D., Ball, Lorenzo, Banerjee, Arna, Bates, John, Baudouin, S.V., Bauer, Michael, Beitler, Jeremy R., Bellomo, Rinaldo, Beloncle, François, Bennett, Kimberly S., Bhalla, Paulomi K., Bhargava, Maneesh, Broccard, Alain F., Bouchard, Josée, Cahill, Naomi E., Carsetti, Andrea, Cecconi, Maurizio, Cepeda, Celina D., Cereda, Maurizio, Chandler, John, Chesnut, Randall M., Collard, Meredith, Contreras, Maya, Cooper, David J., Coopersmith, Craig M., Cosgrave, David, Cunha, Cheston B., Curley, Gerard F., Curtis, Randall J., Dalton, Allison, Davis, Kathryn A., De Backer, Daniel, Deutschman, Clifford S., Doherty, Margaret, Doris, Tom, Dorman, Todd, Drabek, Tomas, Duff, Stephen, Dunne, Eimhin, El Solh, Ali A., Ely, E. Wesley, Esteban, Andrés, Evans, Laura, Ferguson, Niall D., Frogel, Jonathan, Furmaga, Jakub, Gajic, Ognjen, De Moraes, Alice Gallo, Garpestad, Erik, Gershengorn, Hayley B., Gordon, Emily K., Grabenkort, W. Robert, Gruartmoner, Guillem, Gutsche, Jacob T., Halpern, Scott, Hayes, Ivan, Heming, Nicholas, Heyland, Daren K., Hill, Nicholas S., Hirshberg, Eliotte, Hite, R. Duncan, Hollenberg, Steven M., Hotchkiss, Richard S., Ince, Can, Isaac, Margaret, Ishihara, Shiro, Iwashyna, Theodore J., Jäderling, Gabriella, Jeschke, Marc G., Kaplan, Lewis J., Kasner, Scott E., Keane, Colm, Keegan, Mark T., Kevin, Leo G., Kiernan, Fiona, Kleinpell, Ruth, Kleinschmidt, Kurt, Kochanek, Patrick M., Kofke, W. Andrew, Kohl, Benjamin A., Kortgen, Andreas, Laffey, John G., Lamontagne, Francois, Lane-Fall, Meghan, Lanspa, Michael, Lappin, David, Lava, Michael, Levine, Joshua M., Levinson, Andrew T., Levy, Mitchell M., Levy, Richard J., Lorente, José Angel, Lyons, John, MacKenzie, Larami, Malhotra, Anita K., Marks, Joshua A., Marsh, Brian, Marshall, John C., Martin, Greg S., Massaro, Allie M., Masterson, Claire, Maxime, Virginie, McAuley, Danny, McConnell, Kevin W., McDermott, Gráinne, McKinley, Bruce A., Meade, Maureen O., Mebazaa, Alexandre, Mehta, Ravindra L., Mesquida, Jaume, Messer, B., Meurling, Imran J., Mittal, Rohit, Monnet, Xavier, Morris, Alan H., Mukherjee, Vikramjit, Nakada, Taka-Aki, Neligan, Patrick J., Nichol, Alistair, Nikravan, Sara, Nunnally, Mark E., O’Connor, Michael, Odom, Stephen R., Opal, Steven M., O’Regan, Anthony, O’Regan, John, O’Shaughnessy, Michelle, Pandharipande, Pratik P., Patel, Prakash A., Patterson, Andrew J., Pelosi, Paolo, Perner, Anders, Pettila, Ville, Piazza, Matthew, Pinsky, Michael R., Plante, Lauren A., Preiser, Jean-Charles, Radermacher, Peter, Reilly, Patrick M., Rhodes, Andrew, Ricci, Zaccaria, Ronco, Claudio, Russell, James A., Ryu, Ho Geol, Saillant, Noelle N., Sailors, R. Matthew, Sandsmark, Danielle K., Sarani, Babak, Sato, Naoki, Schuster, James, Scully, Mike, Serbanescu, Mara, Sevilla Berrios, Ronaldo, Sims, Carrie A., Smith, Brian P., Steel, Andrew C., Sutherasan, Yuda, Sweeney, Rob Mac, Takahashi, Waka, Talmor, Daniel, Thompson, B. Taylor, Thooft, Aurelie, Tisherman, Samuel A., Turnbull, Isaiah R., Uppal, Amit, Vail, Emily, Valdez, Carrie, Vijayan, Joy, Villa, Gianluca, Vincent, Jean-Louis, Wagner, Jason, Walshe, Criona M., Weiss, Scott L., Weiss, Stuart J., Wunsch, Hannah, Yi, Debbie H., Yu, Felix, Yucel, Evin, Yuki, Nobuhiro, Zampieri, Fernando, and Zhou, Ting

Published
2016
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27. Geschäftsprozeßmodellierung und Workflow-Management: Forschungs- und Entwicklungsbedarf im Rahmen der Entwicklungsbegleitenden Normung (EBN)

Author

Behrens, H., Fähnrich, K.-P., Gieffers, S., Groh, G., Herbster, C., Hoof, A.J.M. van, Kramer, J., Lindert, F., Mayer, R., Messer, B., Olbrich, T.J., Passlack, H.-J., Rothleitner, W., Striemer, R., Weichardt, F., Zimmermann, M., Zimmermann, V., and Publica

Subjects
Entwicklungsbegleitende Normung, Workflow-Management, Geschäftsmodellierung
Abstract

Der DIN-Fachbericht 50 definiert den Normungsbedarf im Bereich der Geschätsprozeßmodellierung und des Workflow Managements. Es wird gezeigt, auf welchen Gebieten heute ein erheblicher Normungsbedarf besteht, wenn sich in der nächsten Zukunft Workflow Management Systeme, Prozeßmodelle und Referenzmodelle am Markt durchsetzen sollen. Besonders wurden die betrieblichen und organisatorischen Aspekte, z.B. die Einführung in Betriebe oder die Messung der Wirtschaftlichkeit, analysiert. Auf diesem Gebiet wnrden Normen eine wesentliche Hilfe darstellen. Durch eine Normung der Begriffe und Kriterien wird für zukünftige Kunden von Workflow Management Systemen eine größere Transparenz der angebotenen Systeme erreicht, da dann die Funktionalitäten leicht verglichen werden können. Der Fachbericht geht darüberhinaus noch auf die wesentlichen technischen Apeskte ein und zeigt, daß es zur Zeit verschiedene sich widersprechende Bemühungen gibt, die technischen Schnittstellen zwischen Workflow Managemen t Systemen festzulegen. Hierfür ist eine internationale Norm zwingend notwendig.

Published
1996

30. Bedingungen erfolgreicher Telekooperation. Ein Erfahrungsbericht

Author

Fellien, A., Gottschick, J., Messer, B., Nentwig, L., Sandkuhl, K., and Publica

Subjects
computer supported cooperative work, telework, Telekooperation, verteiltes System, Systemmanagement, Breitbandkommunikation, broadband communication, distributed system, CSCW
Abstract

This report gives an insight into the projects carried out in the "Integrated Software Infrastructures" department of the ISST Berlin on the subject of teleworking and telecooperation, as well as into the assumptions on which they were based and the initial experiences of the group. These are the installation and testing of a connection with the Dortmund branch (Cobra-l project), a project on the support of hotline consulting in the Berlin Service and Administration Centre for local administration centres in the public administrative districts of Berlin (HotCon project), and a project for the development of a general speech-act-based workflow system for the field of administration (WAM project).The authors come to the conclusion that telecooperation and teleworking can open up considerable economical and social potentials as a result of new fields of activity and increased effectiveness. But this will depend on a significant improvement in the technical and organizational conditions. I t is thus only natural that computer scientists should carry out the initial exploratory work "on themselves".

Published
1994

47. AN ADI-LIKE PRECONDITIONER FOR BOLTZMANN TRANSPORT.

Author

D'Azevedo, E. F., Messer, B., Mezzacappa, A., and Liebendorfer, M.

Subjects
*TRANSPORT theory, *MATHEMATICAL physics, *HYDRODYNAMICS, *MATRICES (Mathematics), *EQUATIONS, *FLUID dynamics
Abstract

Numerical modeling of radiation transport and fluid dynamics are central to many fields of science. This paper studies the application of preconditioned iterative methods to time- dependent coupled hydrodynamics and radiation (Boltzmann) transport. In particular, we focus on the solution of Jacobian matrices in full Newton iterations in the modeling of neutrino (radiation) transport in core collapse supernovae. This is a demanding radiation hydrodynamics application, requiring accurate time-dependent neutrino transport coupled to hydrodynamics driven by this transport. Given a fully implicit finite differencing of the transport equations, the Jacobian matrices have a special block tridiagonal structure. The off-diagonal blocks are exactly diagonal and correspond to the spatial transport of neutrinos and the coupling of adjacent spatial zones owing to this transport. The dense diagonal blocks, on the other hand, arise from the coupling between the neutrino direction cosines and energy, as a result of neutrino emission, absorption, and scattering, in the multiple species multiple energy group discrete ordinates formulation for solving the Boltzmann transport equations. We consider an effective alternating direct implicit (ADI)-like preconditioner where we alternately sweep along the one-dimensional spatial direction and separatelly handle the coupling among multi- direction multigroup variables within each spatial discretization cell. Numerical examples are given to illustrate the fast convergence and efficient parallel implementation. The results suggest that even simple fixed point iteration can achieve a similar convergence rate as GMRES and BICGSTAB. [ABSTRACT FROM AUTHOR]

Published
2004
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