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  1. Book ; Online: Optimizing Geant4 Hadronic Models

    Genser, Krzysztof / Jun, Soon Yung / Ribon, Alberto / Uzhinsky, Vladimir / Yarba, Julia

    2023  

    Abstract: Geant4, the leading detector simulation toolkit used in high energy physics, employs a set of physics models to simulate interactions of particles with matter across a wide range of energies. These models, especially the hadronic ones, rely largely on ... ...

    Abstract Geant4, the leading detector simulation toolkit used in high energy physics, employs a set of physics models to simulate interactions of particles with matter across a wide range of energies. These models, especially the hadronic ones, rely largely on directly measured cross-sections and inclusive characteristics, and use physically motivated parameters. However, they generally aim to cover a broad range of possible simulation tasks and may not always be optimized for a particular process or a given material. The Geant4 collaboration recently made many parameters of the models accessible via a configuration interface. This opens a possibility to fit simulated distributions to the thin target experimental datasets and extract optimal values of the model parameters and the associated uncertainties. Such efforts are currently undertaken by the Geant4 collaboration with the goal of offering alternative sets of model parameters, also known as "tunes", for certain applications. The effort should subsequently lead to more accurate estimates of the systematic errors in physics measurements given the detector simulation role in performing the physics measurements. Results of the study are presented to illustrate how Geant4 model parameters can be optimized through applying fitting techniques, to improve the agreement between the Geant4 and the experimental data.

    Comment: 26th International Conference on Computing in High Energy & Nuclear Physics (CHEP 2023)
    Keywords High Energy Physics - Experiment ; Physics - Instrumentation and Detectors
    Subject code 621
    Publishing date 2023-09-21
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Book: Entstehung und Entwicklung des mittleren Donaulimes

    Genser, Kurt

    (Linzer archäologische Forschungen : Sonderheft ; 25)

    2001  

    Author's details Kurt Genser
    Series title Linzer archäologische Forschungen : Sonderheft ; 25
    Keywords Österreich ; Donaulimes
    Language German
    Size 42 S, Kt
    Publisher NORDICO-Museum der Stadt Linz
    Publishing place Linz
    Document type Book
    ISBN 3854845731 ; 9783854845737
    Database Former special subject collection: coastal and deep sea fishing

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    Inter-library loan at ZB MED

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  3. Book ; Online: Control of polymorphism during epitaxial growth of hyperferroelectric candidate LiZnSb on GaSb (111)B

    Du, Dongxue / Strohbeen, Patrick J. / Paik, Hanjong / Zhang, Chenyu / Genser, Konrad / Rabe, Karin M. / Voyles, Paul M. / Schlom, Darrell G. / Kawasaki, Jason K.

    2020  

    Abstract: A major challenge for ferroelectric devices is the depolarization field, which competes with and often destroys long-range polar order in the limit of ultrathin films. Recent theoretical predictions suggest a new class of materials, termed ... ...

    Abstract A major challenge for ferroelectric devices is the depolarization field, which competes with and often destroys long-range polar order in the limit of ultrathin films. Recent theoretical predictions suggest a new class of materials, termed hyperferroelectics, that should be robust against the depolarization field and enable ferroelectricity down to the monolayer limit. Here we demonstrate the epitaxial growth of hexagonal LiZnSb, one of the hyperferroelectric candidate materials, by molecular-beam epitaxy on GaSb (111)B substrates. Due to the high volatility of all three atomic species, we find that LiZnSb can be grown in an adsorption-controlled window, using an excess zinc flux. Within this window, the desired polar hexagonal phase is stabilized with respect to a competing cubic polymorph, as revealed by X-ray diffraction and transmission electron microscopy measurements. First-principles calculations show that for moderate amounts of epitaxial strain and moderate concentrations of Li vacancies, the cubic LiZnSb phase is lower in formation energy than the hexagonal phase, but only by a few meV per formula unit. Therefore we suggest that kinetics plays a role in stabilizing the desired hexagonal phase at low temperatures. Our results provide a path towards experimentally demonstrating ferroelectricity and hyperferroelectricity in a new class of ternary intermetallic compounds.

    Comment: The following article has been submitted to the Journal of Vacuum Science and Technology. After it is published, it will be found at https://avs.scitation.org/journal/jvb
    Keywords Condensed Matter - Materials Science
    Subject code 530
    Publishing date 2020-01-15
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Book: Der Donaulimes in Österreich

    Genser, Kurt

    (Schriften des Limesmuseums Aalen ; 44)

    1990  

    Author's details Kurt Genser
    Series title Schriften des Limesmuseums Aalen ; 44
    Language German
    Size 93, [3] S, zahlr. Ill., graph. Darst., Kt, 21 cm
    Publisher Württembergisches Landesmuseum
    Publishing place Stuttgart
    Document type Book
    Note Literaturverz. S. 92 - [96] ; Zsfassung in engl., franz. und dt.
    Database Former special subject collection: coastal and deep sea fishing

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  5. Book: Der Donaulimes in Österreich

    Genser, Kurt

    (Schriften des Limesmuseums Aalen ; 44)

    1990  

    Author's details Kurt Genser
    Series title Schriften des Limesmuseums Aalen ; 44
    Language German
    Size 93, [3] S, zahlr. Ill., graph. Darst., Kt, 21 cm
    Publisher Württembergisches Landesmuseum
    Publishing place Stuttgart
    Document type Book
    Note Literaturverz. S. 92 - [96] ; Zsfassung in engl., franz. und dt.
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  6. Book ; Online: GEANT4 Parameter Tuning Using Professor

    Elvira, V. / Fields, L. / Genser, K. L. / Hatcher, R. / Ivanchenko, V. / Kelsey, M. / Koi, T. / Perdue, G. N. / Ribon, A. / Uzhinsky, V. / Wright, D. H. / Yarba, J. / Jun, S. Y.

    2019  

    Abstract: The Geant4 toolkit is used extensively in high energy physics to simulate the passage of particles through matter and to predict effects such as detector efficiencies and smearing. Geant4 uses many underlying models to predict particle interaction ... ...

    Abstract The Geant4 toolkit is used extensively in high energy physics to simulate the passage of particles through matter and to predict effects such as detector efficiencies and smearing. Geant4 uses many underlying models to predict particle interaction kinematics, and uncertainty in these models leads to uncertainty in high energy physics measurements. The Geant4 collaboration recently made free parameters in some models accessible through partnership with Geant4 developers. We present a study of the impact of varying parameters in three Geant4 hadronic physics models on agreement with thin target datasets and describe fits to these datasets using the Professor model tuning framework. We find that varying parameters produces substantially better agreement with some datasets, but that more degrees of freedom are required for full agreement. This work is a first step towards a common framework for propagating uncertainties in Geant4 models to high energy physics measurements, and we outline future work required to complete that goal.

    Comment: 44 pages, 36 figures. Replaced with published version
    Keywords Physics - Instrumentation and Detectors ; High Energy Physics - Experiment
    Subject code 621
    Publishing date 2019-10-14
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  7. Book: Der österreichische Donaulimes in der Römerzeit

    Genser, Kurt

    ein Forschungsbericht

    (Der römische Limes in Österreich ; 33)

    1986  

    Author's details von Kurt Genser
    Series title Der römische Limes in Österreich ; 33
    Keywords Österreich ; Donaulimes
    Language German
    Size 814 S, Ill., graph. Darst., Kt, 30 cm
    Publisher Verl. der Österreichischen Akad. d. Wiss
    Publishing place Wien
    Document type Book
    Note Literaturverz. S. 782 - 787
    ISBN 3700107838 ; 9783700107835
    Database Former special subject collection: coastal and deep sea fishing

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    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  8. Book: Der österreichische Donaulimes in der Römerzeit

    Genser, Kurt

    ein Forschungsbericht

    (Der römische Limes in Österreich ; 33)

    1986  

    Author's details von Kurt Genser
    Series title Der römische Limes in Österreich ; 33
    Keywords Österreich ; Donaulimes
    Language German
    Size 814 S, Ill., graph. Darst., Kt, 30 cm
    Publisher Verl. der Österreichischen Akad. d. Wiss
    Publishing place Wien
    Document type Book
    Note Literaturverz. S. 782 - 787
    ISBN 3700107838 ; 9783700107835
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

    Inter-library loan at ZB MED

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  9. Book ; Online: Response to NITRD, NCO, NSF Request for Information on "Update to the 2016 National Artificial Intelligence Research and Development Strategic Plan"

    Amundson, J. / Annis, J. / Avestruz, C. / Bowring, D. / Caldeira, J. / Cerati, G. / Chang, C. / Dodelson, S. / Elvira, D. / Farahi, A. / Genser, K. / Gray, L. / Gutsche, O. / Harris, P. / Kinney, J. / Kowalkowski, J. B. / Kutschke, R. / Mrenna, S. / Nord, B. /
    Para, A. / Pedro, K. / Perdue, G. N. / Scheinker, A. / Spentzouris, P. / John, J. St. / Tran, N. / Trivedi, S. / Trouille, L. / Wu, W. L. K. / Bom, C. R.

    2019  

    Abstract: We present a response to the 2018 Request for Information (RFI) from the NITRD, NCO, NSF regarding the "Update to the 2016 National Artificial Intelligence Research and Development Strategic Plan." Through this document, we provide a response to the ... ...

    Abstract We present a response to the 2018 Request for Information (RFI) from the NITRD, NCO, NSF regarding the "Update to the 2016 National Artificial Intelligence Research and Development Strategic Plan." Through this document, we provide a response to the question of whether and how the National Artificial Intelligence Research and Development Strategic Plan (NAIRDSP) should be updated from the perspective of Fermilab, America's premier national laboratory for High Energy Physics (HEP). We believe the NAIRDSP should be extended in light of the rapid pace of development and innovation in the field of Artificial Intelligence (AI) since 2016, and present our recommendations below. AI has profoundly impacted many areas of human life, promising to dramatically reshape society --- e.g., economy, education, science --- in the coming years. We are still early in this process. It is critical to invest now in this technology to ensure it is safe and deployed ethically. Science and society both have a strong need for accuracy, efficiency, transparency, and accountability in algorithms, making investments in scientific AI particularly valuable. Thus far the US has been a leader in AI technologies, and we believe as a national Laboratory it is crucial to help maintain and extend this leadership. Moreover, investments in AI will be important for maintaining US leadership in the physical sciences.
    Keywords Astrophysics - Instrumentation and Methods for Astrophysics ; Computer Science - Artificial Intelligence ; Physics - Physics and Society
    Subject code 028
    Publishing date 2019-11-04
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  10. Article: Molecular cloning, sequencing and expression in Escherichia coli of the poly(3-hydroxyalkanoate) synthesis genes from Alcaligenes latus DSM1124.

    Genser, K F / Renner, G / Schwab, H

    Journal of biotechnology

    1998  Volume 64, Issue 2-3, Page(s) 125–135

    Abstract: Fragments of chromosomal DNA from Alcaligenes latus DSM1124 were cloned into Escherichia coli and transformants were screened for poly(D(-)-3-hydroxybutyrate) [P(3HB)] production during excess carbon supply. A plasmid harboring a 5.5-kb insert of A. ... ...

    Abstract Fragments of chromosomal DNA from Alcaligenes latus DSM1124 were cloned into Escherichia coli and transformants were screened for poly(D(-)-3-hydroxybutyrate) [P(3HB)] production during excess carbon supply. A plasmid harboring a 5.5-kb insert of A. latus DNA was isolated from a P(3HB)-producing bacterial colony. The insert was partially sequenced and three major open reading frames (ORFs) were found, representing the PHA synthase (phaC), beta-ketothiolase (phaA) and acetoacetyl-CoA reductase (phaB) genes. They show striking homology to the Ralstonia eutropha (formerly Alcaligenes eutrophus) phaC (71%), phaA (77%) and phaB (80%) genes, and are organized in the same way. The only major difference is the replacement of 560 nucleotides by 160 non-homologous nucleotides in the 5' region of phaC in A. latus. The phaC ORF lacks 29 amino acids at the N-terminus, compared to that of R. eutropha, and starts with a GTG codon. The transcription start points of the operon were determined. P(3HB) production of recombinant E. coli strains harboring the pha operons of A. latus DSM1124 or R. eutropha H16 was investigated. Both operons gave rise to less than 5% P(3HB) formation during exponential growth. At the end of the growth phase, the P(3HB) content reached approximately 20% of cell dry mass. Under nitrogen-depleted conditions, the A. latus pha genes gave rise to 50-52% P(3HB), compared to 33-38% for the R. eutropha pha genes. No NADH oxidase activity was detectable in A. latus, indicating an impaired respiratory pathway and a dependence on PHA synthesis for storing reduction equivalents during growth.
    MeSH term(s) Acyltransferases/metabolism ; Alcaligenes/genetics ; Amino Acid Sequence ; Base Sequence ; Cloning, Molecular ; DNA, Bacterial ; Escherichia coli/genetics ; Hydroxybutyrates/metabolism ; Molecular Sequence Data ; Multienzyme Complexes/metabolism ; NADH, NADPH Oxidoreductases/metabolism ; Open Reading Frames ; Promoter Regions, Genetic ; Recombination, Genetic
    Chemical Substances DNA, Bacterial ; Hydroxybutyrates ; Multienzyme Complexes ; NADH oxidase (EC 1.6.-) ; NADH, NADPH Oxidoreductases (EC 1.6.-) ; Acyltransferases (EC 2.3.-) ; poly(3-hydroxyalkanoic acid) synthase (EC 2.3.1.-)
    Language English
    Publishing date 1998-10-08
    Publishing country Netherlands
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 843647-2
    ISSN 1873-4863 ; 0168-1656 ; 1389-0352
    ISSN (online) 1873-4863
    ISSN 0168-1656 ; 1389-0352
    DOI 10.1016/s0168-1656(98)00093-5
    Database MEDical Literature Analysis and Retrieval System OnLINE

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