cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: e-Forschungsberichte, Faszikel 1 (2016)
title: Research E-Papers, Faszikel 1 (2016)
title: Faszikel 1 (2016)
titleType: AlternativeTitle
Creators: name: Deutsches Archäologisches Institut
Publisher: name: Deutsches Archäologisches Institut
Year: 2017

description: Das „Corpus der Urkunden der Römischen Herrschaft (CURH)“ Licht aus Scherben, Fetzen und Steinen...1–4 Das Corpus der Antiken Sarkophage und das Repertorium der christlich-antiken Sarkophage...5–9 Assuan, Ägypten Regionale Siedlungsnetzwerke – Geoarchäologischer Survey nördlich von Assuan...10–12 Heliopolis , Ägypten: Undulierende Umfassungsmauern der ägyptischen Spätzeit...13–16 CROSSFIRE/CRFB, Deutschland „Crossing Frontiers in Iron Age and Roman Europe (CROSSFIRE )“ und Corpus der römischen Funde im europäischen Barbaricum...17–19 Donaugebiet (Bayern), Deutschland: Kastelle und Villen an Donau und Limes in Raetien: Forschungen zu römischen Militärund Zivilanlagen...20–24 Manching, Deutschland: Abschluss der Arbeiten und Publikation...25–27 Aruchlo, Georgien: Neolithische Siedlung im Südkaukasus...28–38 Ladontal , Griechenland: Die Begehung im Jahr 2012...39–41 Avebury, Großbritannien: Landschaftsarchäologische Betrachtungen...42–45 Agrigent, Italien: Das Olympieion...46–48 Rom, Italien: Marsfeld...49–53 Sarno-Ebene, Italien: Landschafts- und siedlungsarchäologische Untersuchungen...54–66 Selinunt, Italien: Die Arbeiten der Jahre 2014 und 2015...67–84 Graçanicë-Gračanica, Kosovo: Ulpiana/Iustiniana Secunda...85–89 Koboltatal , Republik Moldau: Studien zu den Kulturbeziehungen der Sântana-de-Mureş-Kultur zwischen Pruth und Dnjestr...90–92 Sizandro und Alcabrich el (Torres Vedras ), Portugal: Zwei kupferzeitliche Siedlungskammern im Vergleich...93–102 Taganrog, Russische Föderation: Die Arbeiten des Jahres 2013...103–109 Tartas 1, Russische F öderation: Ausgrabungen in einer der größten prähistorischen Nekropolen Westsibiriens...110–114 Gamzigrad, Serbien: Der spätantike Kaiserpalast Felix Romuliana und sein Umfeld...115–123 Region Huelva/Onuba, Spanien: Das Tharsis-Projekt: Wirtschaftsweise, Gesellschaft und Kultur in der Kontaktzone zwischen Küste und Hinterland zur mittleren Eisenzeit...124–130 Charvátská Nová Ves, Tschechische Republik: Ein temporäres römisches Militärlager in Südmähren...131–136 Aspendos, Türkei: Die Arbeiten der Jahre 2012 bis 2014...137–141 Didyma, Türkei: Site Managment...142–149 Kırklarelİ, Türkei: Ausgrabungen in der neolithischen Siedlung Aşaǧı Pınar...150–159 Milet, Türkei: Aufarbeitung griechischer Terrakotten und Keramikfunde...160–163 Milet, Türkei: Die geometrische Keramik aus Altgrabungen. Publikation der Funde der Altgrabungen und Herkunftsbestimmung durch xRFA-Messungen...164–167 Tavşan Adası, T ürkei: Die Arbeiten des Jahres 2012...168–173 Alsónyék-Bátaszék, Ungarn: Der größte neolithische Fundort in Mitteleuropa...174–178 Sárköz, Südungarn: Das Neolithikum in Transdanubien...179–185 Szólád, Ungarn: Auswertungsarbeiten am langobardenzeitlichen Gräberfeld: Katalogarbeiten, Genetik, Publikation und interdisziplinäre Arbeitstreffen...186–190
On the contribution of nearly-critical spin and charge collective modes to the Raman spectra of high-Tc cuprates
Creators: name: Caprara, S.
name: Di Castro, C.
name: Enss, T.
name: Grilli, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We discuss how Raman spectra are affected by nearly-critical spin and charge collective modes, which are coupled to charge carriers near a stripe quantum critical point. We show that specific fingerprints of nearly-critical collective modes can indeed be observed in Raman spectra and that the selectivity of Raman spectroscopy in momentum space may also be exploited to distinguish the spin and charge contribution. We apply our results to discuss the spectra of high-Tc superconducting cuprates finding that the collective modes should have masses with substantial temperature dependence in agreement with their nearly critical character. Moreover spin modes should be more diffusive than charge modes indicating that in stripes the charge is nearly ordered, while spin modes are strongly overdamped and fluctuate with high frequency.
description: 5 pages, 3 figures
Investigation of Uncertainty of Deep Learning-based Object Classification on Radar Spectra
Creators: name: Patel, Kanil
name: Beluch, William
name: Rambach, Kilian
name: Cozma, Adriana-Eliza
name: Pfeiffer, Michael
name: Yang, Bin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Deep learning (DL) has recently attracted increasing interest to improve object type classification for automotive radar.In addition to high accuracy, it is crucial for decision making in autonomous vehicles to evaluate the reliability of the predictions; however, decisions of DL networks are non-transparent. Current DL research has investigated how uncertainties of predictions can be quantified, and in this article, we evaluate the potential of these methods for safe, automotive radar perception. In particular we evaluate how uncertainty quantification can support radar perception under (1) domain shift, (2) corruptions of input signals, and (3) in the presence of unknown objects. We find that in agreement with phenomena observed in the literature,deep radar classifiers are overly confident, even in their wrong predictions. This raises concerns about the use of the confidence values for decision making under uncertainty, as the model fails to notify when it cannot handle an unknown situation. Accurate confidence values would allow optimal integration of multiple information sources, e.g. via sensor fusion. We show that by applying state-of-the-art post-hoc uncertainty calibration, the quality of confidence measures can be significantly improved,thereby partially resolving the over-confidence problem. Our investigation shows that further research into training and calibrating DL networks is necessary and offers great potential for safe automotive object classification with radar sensors.
description: 6 pages
Measurement of the Total Hadronic Cross Section in e+e- Annihilations below 10.56 GeV
Creators: name: Besson, D.
name: Collaboration, CLEO
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Using the CLEO III detector, we measure absolute cross sections for e+e- --> hadrons at seven center-of-mass energies between 6.964 and 10.538 GeV. The values of R, the ratio of hadronic and muon pair production cross sections, are determined within 2% total r.m.s. uncertainty.
description: 17 pages postscript,also available through http://www.lns.cornell.edu/public/CLNS/2007/, Submitted to PRD
title: e-Forschungsberichte, Faszikel 3 (2015)
title: Research E-Papers, Faszikel 3 (2015)
title: Faszikel 3 (2015)
titleType: AlternativeTitle
Creators: name: Deutsches Archäologisches Institut
Publisher: name: Deutsches Archäologisches Institut
Year: 2017

description: Yeha, Äthiopien: Forschungen zu Migrationsprozessen am nördlichen Horn von Afrika...1–3 Yeha, Äthiopien: Forschungen zur Paläoumwelt und Ressourcennutzung...4–6 Yeha, Äthiopien: Die Restaurierungsarbeiten am Monumentalbau Grat Beʿal Gebri...7–12 Volksrepublik China: Bauwerke der Liao-Zeit (907–1125) – Struktur, Geschichte, Erhalt...13–18 Volksrepublik China: Popularisierung von Archäologie und Kulturerbe...19–28 Volksrepublik China: Unterrichtsmaterialien zur Ostasiatischen Archäologie...29–33 Peking/Ningbo, China: Unterwasserarchäologie...34–41 Olympia, Griechenland: Das Leonidaion...42–46 Tiryns, Griechenland: Die Arbeiten der Jahre 2012 bis 2014...47–55 Dumfrisshire, Großbritannien: Landschaftsarchäologische Untersuchungen an zwei Fundstellen in Südschottland...56–61 Rom, Italien: Die Ziegelstempel der Kaiserpaläste auf dem Palatin...62–69 Hokkaido, Japan: Jomon-Kultur auf Hokkaido...70–72 Aufarbeitungsprojekte der Außenstelle Sana'a, Jemen...73–78 South Qatar Survey Project, Katar: Archäologische Surveys in der südlichen Landeshälfte Katars...79–82 Umm Al Houl, Katar: Archäologische Rettungsmaßnahmen in einer bedrohten Siedlung des 19. Jhs. n. Chr....83–87 Baalbek, Libanon: Forschungen im Steinbruch und die Aufarbeitung der Forschungen von 2001–2012...88–92 Pietrele, München: Neolithische und kupferzeitliche Siedlung am See 5200–4250 v. Chr....93–112 Hama-Region, Syrien: Survey im Gebiet des mittleren Orontes...113–117 Qreiye/Ayyash, Syrien: Die Arbeiten der Jahre 2014 und 2015...118–122 Karthago, Tunesien: Grabung im Bereich der frühpunischen Häuser an der Rue Ibn Chabâat...123–129 Karthago, Tunesien: Der Circus – Ein Monument und sein Quartier...130–134 Aizanoi und Pergamon, Türkei: Ländliche Heiligtümer der Meter-Kybele im Umland von Aizanoi und Pergamon...135–138 Didyma, Türkei: Konsolidierung der Umfassungsmauer des Tempelgebietes (sog. Mandramauer)...139–143 Didyma, Türkei: Restaurierung und Konsolidierung des Apollontempels...144–148 Göbekli Tepe, Türkei: Die Arbeiten der Jahre 2014 (Herbst) und 2015...149–151 Boğazköy-Ḫattuša, Türkei: Restaurierungen...152–157 Milet, Türkei: Denkmalpflege...158–162 Milet, Türkei: Die letzte byzantinische Siedlung auf dem Theaterhügel...163–165 Pergamon, Türkei: Die Arbeiten des Jahres 2014...166–180 Priene, Türkei: Denkmalpflege und Konservierung in einer "Musterstadt"...181–188
Ramsey imaging of optical traps
Creators: name: Ramola, Gautam
name: Winkelmann, Richard
name: Chandrashekara, Karthik
name: Alt, Wolfgang
name: Peng, Xu
name: Meschede, Dieter
name: Alberti, Andrea
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Mapping the potential landscape with high spatial resolution is crucial for quantum technologies based on ultracold atoms. Yet, imaging optical dipole traps is challenging because purely optical methods, commonly used to profile laser beams in free space, are not applicable in vacuum. In this work, we demonstrate precise in-situ imaging of optical dipole traps by probing a hyperfine transition with Ramsey interferometry. Thereby, we obtain an absolute map of the potential landscape with micrometer resolution and shot-noise-limited spectral precision. The idea of the technique is to control the polarization ellipticity of the trap laser beam to induce a differential light shift proportional to the trap potential. By studying the response to polarization ellipticity, we uncover a small but significant nonlinearity in addition to a dominant linear behavior, which is explained by the geometric distribution of the atomic ensemble. Our technique for imaging of optical traps can find wide application in quantum technologies based on ultracold atoms, as it applies to multiple atomic species and is not limited to a particular wavelength or trap geometry.
description: 6 pages, 3 figures
title: e-Forschungsberichte, Faszikel 2 (2015)
title: Research E-Papers, Faszikel 2 (2015)
title: Faszikel 2 (2015)
titleType: AlternativeTitle
Creators: name: Deutsches Archäologisches Institut
Publisher: name: Deutsches Archäologisches Institut
Year: 2017

description: Landschaftsarchäologie am DAI: Zur Einrichtung eines neuen Arbeitskreises...1–3 Draʿ Abu el-Naga, Ägypten: Untersuchung der Grabtempel der Hohenpriester des Amun Ramsesnacht und Amenophis (K93.11/K93.12)...4–8 Iberische Halbinsel: Antike Hafenanlagen auf der iberischen Halbinsel...9–11 County Kilkenny, Republik Ireland: Geomagnetische Prospektion auf dem eisenzeitlichen Hillfort „Freestone Hill“...12–15 Jerusalem, Israel/Palästina: Die Ausgrabung im Museum der Erlöserkirche – ein trinationales Projekt...16–19 Tall Zirāʿa, Jordanien: Die Kalksteingefäße aus der frührömischen Zeit – Religiöse uns sozio-öknomische Implikationen...20–23 Tall Zirāʿa, Jordanien: Landwirtschaftlicher Komplex, ländliche Villa im orientalischen Stil oder Kloseranlage? Die Ausgrabungen im Areal III...24–27 Tall Zirāʿa, Jordanien: Archäometrische Forschungen zur Herkunftsbestimmung der Metallfunde im Rahmen des Gadara Region Projects...28–30 Eh-Sayyeh, Jordanien: Die Arbeiten des Jahres 2014...31–35 Gadara, Jordanien: Forschung und Capacity Building...36–41 Jabal Ash-Sharah, Jordanien: Nabatäische Wohn- und Wirtschaftsstrukturen im Hinterland von Petra...42–45 Mushash 163, Jordanien...46–49 Qasr Mushash-Survey, Jordanien: Die Arbeiten der Jahre 2014...50–56 Alandroal und Guarda, Portugal: Die Romanisierung einheimischer Heiligtümer im Westen der Iberischen Halbinsel...57–62 Tayma, Saudi-Arabien: Multidisziplinäre Forschungen in der Oase...63–70 Tayma, Saudi-Arabien: Bauwerkserhaltung...71–73 Tayma, Saudi-Arabien: Rettungsgrabungen im Gräberfeld von al-Nasim...74–76 Tayma, Saudi-Arabien: Reflectance Transformation Imaging: Innovative Dokumentationstechnologie in der Archäologie...77–79 Vráble, Slowakei: Herausbildung und Niedergang des frühbronzezeitlichen Siedlungszentrums – Untersuchungen zu Wirtschaft, Sozialstruktur und politischer Organisation eines Sozialverbandes und seines Umfeldes...80–86 Añora, Spanien: Der Fundplatz ‚La Losilla‘ bei Añora (Córdoba) – eine spätantike Kirche im ländlichen Bereich der Baetica...87–89 Ibiza, Spanien: Der römische Schiffsfund von Grum de Sal...90–94 Ibiza, Spanien: Zum antiken Bleiglanzabbau am Puig de s’Argentera...95–101 Hamadab, Sudan: Die Arbeiten der Jahre 2013 und 2014...102–107 Resafa, Syrien: Die Arbeiten des Jahres 2014...108–116 Shir, Syrien: Die Arbeiten des Jahres 2014...117–123 Syrian Heritage Archive Project: Die Arbeiten der Jahre 2013 und 2014...124–128 Göbekli Tepe, Türkei: Die Arbeiten des Jahres 2014...129–130 Gonur, Maryskij Velajat, Turkmenistan...131–134 Bandichan, Surchandarja, Usbekistan: Die Arbeiten der Jahre 2012 und 2013...135–137 Molali, Surchandarja, Usebekistan: Die Arbeiten der Jahre 2012 und 2013...138–141
Problem-Based Learning with Concept Mapping
Creators: name: E Mahiban Ross
name: D Beula Jeba Malar
Publisher: name: AAER
Year: 2025

description: Problem-based learning (PBL) promotes student-driven inquiry, while concept mapping provides a structured way to visualize problem-solving processes and enhance science literacy. Combining problem-based learning with concept mapping enhances students’ analytical skills, comprehension, and ability to express scientific knowledge.
Interference bands in decays of doubly-charged Higgs bosons to dileptons in the minimal type-II seesaw model at the TeV scale
Creators: name: Ren, Ping
name: Xing, Zhi-zhong
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The dileptonic decays of doubly-charged Higgs bosons H^{\pm\pm} are investigated in the minimal type-II seesaw model with one Higgs triplet Δand one heavy Majorana neutrino N_1 at the TeV scale. We show that the branching ratios {\cal B}(H^{\pm\pm} \to l^\pm_αl^\pm_β) depend not only on the mass and mixing parameters of three light neutrinos ν_i (for i=1,2,3), but also on those of N_1. Assuming the mass of N_1 to lie in the range 200 GeV--1 TeV, we figure out the generous interference bands for the contributions of ν_i and N_1 to {\cal B}(H^{\pm\pm} \to l^\pm_αl^\pm_β): \sqrt{|\sinθ_{i4} \sinθ_{j4}|} \sim 10^{-8}--10^{-5}, where θ_{i4} and θ_{j4} measure the strength of charged-current interactions of N_1. We illustrate some salient features of the interference bands by considering three typical mass patterns of ν_i, and stress that it is very difficult to distinguish the type-II seesaw model from the triplet seesaw model in such a parameter region at the Large Hadron Collider.
description: RevTex 14 pages, 3 figures, more discussions added, accepted for publication in Phys. Lett. B
SOFIA-upGREAT imaging spectroscopy of the [C II] 158um fine structure line of the Sgr B region in the Galactic center
Creators: name: Harris, A. I.
name: Güsten, R.
name: Requena-Torres, M. A.
name: Riquelme, D.
name: Morris, M. R.
name: Stacey, G. J.
name: Martìn-Pintado, J.
name: Stutzki, J.
name: Simon, R.
name: Higgins, R.
name: Risacher, C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We report SOFIA-upGREAT spectroscopic imaging of the [C II] 158um spectral line, as well as a number of [O I] 63um spectra, across a 67x45 pc field toward the Sgr B region in our Galactic center. The fully-sampled and velocity-resolved [C II] images have 0.55 pc spatial and 1 km/s velocity resolutions. We find that Sgr B extends as a coherent structure spanning some 34 pc along the Galactic plane. Bright [C II] emission encompasses Sgr B1 (G0.5-0.0), the G0.6-0.0 HII region, and passes behind and beyond the luminous star forming cores toward Sgr B2 (G0.7-0.0). Sgr B is a major contributor to the entire Galactic center's [C II] luminosity, with surface brightness comparable to [C II] from the Arches region. [C II], 70um, and 20cm emission share nearly identical spatial distributions. Combined with the lack of [C II] self-absorption, this indicates that these probes trace UV on the near surfaces of more extended clouds visible in CO isotopologues and 160um continuum. Stars from regions of local star formation likely dominate the UV field. Photodissociation regions and HII regions contribute similar amounts of [C II] flux. The extreme star formation cores of Sgr B2 contribute negligible amounts to the total [C II] intensity from the Sgr B region. Velocity fields and association with a narrow dust lane indicate that they may have been produced in a local cloud-cloud collision. The cores are likely local analogs of the intense star formation regions where ideas to explain the "C+ deficit" in ultra-luminous galaxies can be tested.
description: 22 pages, 13 figures. Accepted for publication in the Astrophysical Journal
Optimizing the double description method for normal surface enumeration
Creators: name: Burton, Benjamin A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Geometric Topology (math.GT)
subject: Computational Geometry (cs.CG)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 52B55 (Primary) 57N10, 57N35 (Secondary)

description: Many key algorithms in 3-manifold topology involve the enumeration of normal surfaces, which is based upon the double description method for finding the vertices of a convex polytope. Typically we are only interested in a small subset of these vertices, thus opening the way for substantial optimization. Here we give an account of the vertex enumeration problem as it applies to normal surfaces, and present new optimizations that yield strong improvements in both running time and memory consumption. The resulting algorithms are tested using the freely available software package Regina.
description: 27 pages, 12 figures; v2: Removed the 3^n bound from Section 3.3, fixed the projective equation in Lemma 4.4, clarified "most triangulations" in the introduction to section 5; v3: replace -ise with -ize for Mathematics of Computation (note that this changes the title of the paper)
title: e-Forschungsberichte, Faszikel 1 (2015)
title: Research E-Papers, Faszikel 1 (2015)
title: Faszikel 1 (2015)
titleType: AlternativeTitle
Creators: name: Deutsches Archäologisches Institut
Publisher: name: Deutsches Archäologisches Institut
Year: 2017

description: Abu Mina, Ägypten: Das Pilgerzentrum...1–3 Aegaron, Ägypten: Ancient Egyptian Architecture Online (AEgArOn): Ein Repositorium für standardisierte Pläne und Daten altägyptischer Architektur...4–7 Deir Anba Hadra, Ägypten: Koptische und arabische Inschriften sowie archäologisch-bauforscherische Untersuchungen im Simeonskloster bei Assuan...8–10 Buto, Ägypten: Lanschaftsarchäologie und regionale Siedlungsnetzwerke um den Fundplatz Tell el Faracin, Gouvernorat Kafr esch-Scheich...11–13 Draʿ Abu el-Naga, Ägypten: Die spätantike koptische Klosteranlage Deir el-Bachît...14–17 Elephantine, Ägypten: Stadt und Tempel...18–21 Fayum, Ägypten: Das Fayum Survey Projekt...22–23 Watfa, Ägypten: Die Wasserversorgung ausgewählter Dörfer des Fayum in griechisch-römischer Zeit...24–26 Gizeh, Ägypten: Die Reliefs aus dem Taltempel der Knickpyramide in Dahschur und andere Funde aus den Grabungen Ahmed Fakhrys...27–31 Ägypten: Industriearchitektur des 19. und 20. Jahrhunderts in Ägypten...32–37 Raum Assuan, Ägypten: Die Kulte muslimischer Heiliger...38–40 Kairo, Ägypten: Sichtung, Katalogisierung und Verglasug der Michigan Papyri im Ägyptischen Museum...41–43 Kairo, Ägypten: Topographisch-geographische Sacherschließung der Bibliotheksbestände der Abteilung Kairo...44–46 Saqqara, Ägypten: Das Grab des Königs Ninetjer...47–49 Theben-West, Ägypten: Die Memnon-Kolosse und der Totentempel Amenophis’ III. auf dem Kom el-Hettan...50–53 Kairo, Ägypten: Unterrichtsmaterialien zur ägyptischen Archäologie...54–56 Samos, Griechenland: Heraion und Heilige Straße...57–62 Arbil, Föderale Region Kurdistan/Irak: Die Arbeiten der Jahre 2012 und 2013...63–69 Avellino und Benevent, Italien: Rekontextualisierung römischer Skulptur im antiken Hirpinien...70– Italien: Kleine Orte der Kaiserzeit...73–74 Rom, Italien: Basilica Aemilia und Basilica Iulia am Forum Romanum...75–78 Via Aurelia Antica/Rom, Italien: Columbarium des C. Scribonius Menophilus...79–82 Rom, Italien: Architekturfragmente aus dem Steindepot der Diokletiansthermen...83–84 Rom/Apulien, Italien: Die Archäologie konjunktureller Bewegungen auf der italischen Halbinsel und im Westen des Römischen Reiches...85–87 Archiv DAI Rom, Italien: Zeichnungen des Instituto di Corrispondenza Archeologica in Rom...88–93 Teanum und Campanien, Italien: Hellenistische Altäre und Heiligtümer...94–98 Zambujal (Torres Vedras), Portugal...99–104 Ibiza (Balearen), Spanen: Der römische Schiffsfund von Grum de Sal...105–109 Munigua, Spanien...110–117 Ibiza (Balearen), Spanen: Zum antiken Bleiglanzabbau am Puig de s’Argentera...118–122
title: e-Forschungsberichte, Faszikel 3 (2014)
title: Research E-Papers, Faszikel 3 (2014)
title: Faszikel 3 (2014)
titleType: AlternativeTitle
Creators: name: Deutsches Archäologisches Institut
Publisher: name: Deutsches Archäologisches Institut
Year: 2017

description: Abydos, Ägypten: Die Königsgräber der 1. und 2. Dynastie...2–5 Abydos, Ägypten: Osiriskult...6–8 Buto, Ägypten: Die Siedlungsgeschichte des Fundplatzes Buto (Tell el Fara’in)...9–13 Assuan, Ägypten: Felsinschriften und Felsbilder der Region von Assuan...14–17 Kairo, Ägypten: Die Geschichte der Abteilung Kairo des DAI im Spannungsfeld deutscher politischer Interessen von 1881 bis 1966...18–20 Yeha, Äthiopien: Die Klosterkirche Debre Mariam...21–23 Trichterbecherkultur in Nordmitteleuropa: Bevölkerungsdichte, Kommunikationsstrukturen und Traditionsräume...24–26 Kalapodi, Griechenland...27–31 Chemchemal, Irak: Die Arbeiten der Jahre 2012 und 2013...32–37 Tel Tsaf, Israel: Die Arbeiten des Jahres 2013...38–39 Capua, Italien: Das Amphitheater...40–43 Allumiere, Italien: Früher Bergbau in Mittelitalien...44–48 Heloros, Italien: Hellenistische Heiligtümer in Sizilien...49–52 Sirwah, Jemen...53–56 Qasr Mushash-Survey, Jordanien: Die Arbeiten der Jahre 2012 und 2013...57–61 Nördliche Badia, Jordanien: Aride Lebensräume im 5. bis frühen 3. Jahrtausend v. Chr.: Mobile Subsistenz, Kommunikation und Ressourcennutzung...62–70 Tall al-Magass, Jordanien: Aseym-Projekt...71–73 Orlovka-Kartal, Republik Moldau: Der Siedlungskompley Orlovka-Kartal und die frühe Kupferzeit im nordwestlichen Schwarzmeer-Gebiet...74–77 Taman-Halbinsel, Russische Föderation...78–81 Añora, Spanien: Der Fundplatz ‚La Losilla‘ bei Añora (Córdoba) – eine spätantike Kirche im ländlichen Bereich der Baetica...82–84 Kanatha, Syrien: Die Arbeiten der Jahre 2012 und 2013...85–87 Jach-Su-Tal, Tadschikistan...88–90 Milet, Türkei: Stadt und Statue im spätantiken Kleinasien: Die Faustinathermen in Milet im Übergang von der Kaiserzeit zur Spätantike...91–95 Pergamon, Türkei: Die Arbeiten der Jahre 2012 und 2013...96–106 Pergamon, Türkei: Restaurierung...107–113 Panormos, Türkei: Die Arbeiten der Jahre 2012 und 2013...114–119 Selge, Türkei: Eine Stadt in den pisidischen Bergen...120–126 Olbia, Ukraine: Grautonige Keramik der ersten Jahrhunderte n. Chr. im Unteren Bug-Gebiet...127–129 Region Charkov, Ukraine: Die Infrastruktur im Gebiet der Dnepr-Severkij Donec-Wasserscheide in spätrömischer Zeit und zu Beginn der Völkerwanderungszeit...130–132
Fiber radio frequency transfer using bidirectional frequency division multiplexing dissemination
Creators: name: Li, Qi
name: Hu, Liang
name: Zhang, jinbo
name: Chen, Jianping
name: Wu, Guiling
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We report on the realization of a novel fiber-optic radio frequency (RF) transfer scheme with the bidirectional frequency division multiplexing (FDM) dissemination technique. Here, the proper bidirectional frequency map used in the forward and backward directions for suppressing the backscattering noise and ensuring the symmetry of the bidirectional transfer RF signals within one telecommunication channel. We experimentally demonstrated a 0.9 GHz signal transfer over a 120 km optical link with the relative frequency stabilities of 2.2E-14 at 1 s and 4.6E-17 at 20,000 s. The implementation of phase noise compensation at the remote site has the capability to perform RF transfer over a branching fiber network with the proposed technique as needed by large-scale scientific experiments.
description: 4 pages, 3 figures, accepted for published in IEEE Photonics Technology Letters
A functional programming language with context free grammars as data types
Creators: name: Syrotiuk, Violet Rose
Publisher: name: University of British Columbia
Year: 2010

description: Specifying data structures is important in programming languages. One approach uses initial algebras, but constructing specifications using them is difficult and hampered by restrictions. The recursive term algebra approach, uses recursive definition along with basic operations implied by the definition itself to induce an algebra of terms. Such a recursive definition may be transformed into an unambiguous context free grammar. These grammars are used to define data structures in a functional programming language named Kaviar. Provisions are made for non-context free data structures as well. This approach avoids the difficulties encountered in using the initial algebra method.
GPU Acceleration of 3D Agent-Based Biological Simulations
Creators: name: Hesam, Ahmad
name: Breitwieser, Lukas
name: Rademakers, Fons
name: Al-Ars, Zaid
Publisher: name: arXiv
Year: 2021
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Performance (cs.PF)
subject: FOS: Computer and information sciences

description: Researchers in biology are faced with the tough challenge of developing high-performance computer simulations of their increasingly complex agent-based models. BioDynaMo is an open-source agent-based simulation platform that aims to alleviate researchers from the intricacies that go into the development of high-performance computing. Through a high-level interface, researchers can implement their models on top of BioDynaMo's multi-threaded core execution engine to rapidly develop simulations that effectively utilize parallel computing hardware. In biological agent-based modeling, the type of operations that are typically the most compute-intensive are those that involve agents interacting with their local neighborhood. In this work, we investigate the currently implemented method of handling neighborhood interactions of cellular agents in BioDynaMo, and ways to improve the performance to enable large-scale and complex simulations. We propose to replace the kd-tree implementation to find and iterate over the neighborhood of each agent with a uniform grid method that allows us to take advantage of the massively parallel architecture of graphics processing units (GPUs). We implement the uniform grid method in both CUDA and OpenCL to address GPUs from all major vendors and evaluate several techniques to further improve the performance. Furthermore, we analyze the performance of our implementations for models with a varying density of neighboring agents. As a result, the performance of the mechanical interactions method improved by up to two orders of magnitude in comparison to the multithreaded baseline version. The implementations are open-source and publicly available on Github.
description: 8 pages, 12 figures
Baryonic branches and resolutions of Ricci-flat Kahler cones
Creators: name: Martelli, Dario
name: Sparks, James
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider deformations of N=1 superconformal field theories that are AdS/CFT dual to Type IIB string theory on Sasaki-Einstein manifolds, characterised by non-zero vacuum expectation values for certain baryonic operators. Such baryonic branches are constructed from (partially) resolved, asymptotically conical Ricci-flat Kahler manifolds, together with a choice of point where the stack of D3-branes is placed. The complete solution then describes a renormalisation group flow between two AdS fixed points. We discuss the use of probe Euclidean D3-branes in these backgrounds as a means to compute expectation values of baryonic operators. The Y^{p,q} theories are used as illustrative examples throughout the paper. In particular, we present supergravity solutions describing flows from the Y^{p,q} theories to various different orbifold field theories in the infra-red, and successfully match this to an explicit field theory analysis.
description: 51 pages, v2: reference added and minor changes; v3: minor changes, published version
title: e-Forschungsberichte, Faszikel 2 (2014)
title: Research E-Papers, Faszikel 2 (2014)
title: Faszikel 2 (2014)
titleType: AlternativeTitle
Creators: name: Deutsches Archäologisches Institut
Publisher: name: Deutsches Archäologisches Institut
Year: 2017

description: Kura in Motion, Azerbaijan and Georgia: Landscape investigations...2–4 Mil Plain, Azerbaijan: Ancient water management...5–8 Kamiltepe, Aserbaidschan: Ancient Kura – Kura in Motion...9–11 Dra' Abu el-Naga, Ägypten: Untersuchungen zu Formation und Entwicklung einer oberägyptischen Residenznekropole...12–15 Dra' Abu el-Naga, Ägypten: Untersuchung der Grabtempel der Hoheprister des Amun Ramsesnacht und Amenophis (K93.11/K93.12)...16–20 Assuan, Ägypten: Die frühislamische Nekropole von Assuan...21–25 Kairo, Ägypten: Die Goldbleche aus dem Grab des Tutanchamun...26–28 Horn von Afrika, Äthiopien/Eritrea: Migrationsprozesse am nördlichen Horn von Afrika im frühen 1. Jahrtausend v. Chr....29–31 Yeha, Äthiopien: Site Management und Capacity Building...32–33 Ava Ranga Uka A Toroke Hau, Chile. Forschungen zur Landschaftsüberformung und kultischen Wassernutzung auf der Osterinsel. Die Arbeiten der Jahre 2012 und 2013...34–40 Süddeutschland: Siedlungsbestattungen der Hallstatt- und Frühlatènezeit...41–45 Athen, Griechenland: Kerameikos...46–56 Fabrateria Nova, Italien: San Giovanni Incarico, Provinz Frosinone...57–60 Rom, Italien: Urbs sacra. Sakrale Sphären des kaiserzeitlichen Rom...61–62 Minturno (Lazio), Italien: Das Stadtzentrum...63–67 Eh-Sayyeh, Jordanien: Die Arbeiten des Jahres 2013...68–72 Wadi Ath-Thamad, Jordanien: Nabatäische Wohn- und Wirtschaftsstrukturen im Hochland von Moab...73–77 Petreni, Republik Moldau...78–81 Kislovodsk, Russische Föderation: Spätbronzezeitliche Fundplätze im kaukasischen Hochgebirge...82–88 Vráble, Slowakei: Herausbildung und Niedergang des frühbronzezeitlichen Siedlungszentrums – Untersuchungen zu Wirtschaft, Sozialstruktur und politischer Organisation eines Sozialverbandes und seines Umfeldes...89–92 Ayamonte, Spanien...93–96 Tissamahrama, Sri Lanka: Die Keramiksequenz und ihre Bedeutung für den frühhistorischen Fernhandel im Indischen Ozean...97–105 Raphaneae, Syrien...106–110 Resafa, Syrien: Die Arbeiten der Jahre 2012 und 2013...111–114 Algerien und Tunesien: Inszenierung und Instrumentalisierung von Märtyrern und Heiligen im frühchristlichen Nordafrika...115–119 Karthago, Tunesien: Grabungen an der Rue Ibn Chabâat...120–126 Germia, Türkei: Epigraphischer Survey in der Umgebung von Germia in Nordwestgalatien...127–131 Oinoanda, Türkei: Die Arbeiten der Jahre 2012 und 2013...132–136 Zeugma, Türkei: Untersuchungen an der römischen Stadtmauer von Zeugma (Seleukia am Euphrat)...137–142
title: e-Forschungsberichte, Faszikel 2 (2016)
title: Research E-Papers, Faszikel 2 (2016)
title: Faszikel 2 (2016)
titleType: AlternativeTitle
Creators: name: Deutsches Archäologisches Institut
Publisher: name: Deutsches Archäologisches Institut
Year: 2017

description: European Music Archaeology Project (EMAP): Ein internationales Kooperationsprojekt, gefördert durch die EACEA...1–2 Forschungsvorhaben MGA: Münze und Gesellschaft in Alteuropa...3–5 Draʿ Abu el-Naga, Ägypten: Untersuchungen zu Formation und Entwicklung einer oberägyptischen Residenznekropole...6–13 Kupres, Bosnien-Herzegowina: Von der Natur- zur Kultur- zur Rituallandschaft...14–17 Sarnevo, Bulgarien: Neolithische Tells in Nordthrakien...18–23 Rügen, Deutschland: Archäologische Untersuchungen an Großsteingräbern im Pastitzer Forst...24–27 Waldgirmes, Deutschland: Abschluss der Arbeiten und Publikation...28–30 Ostseeraum, Deutschland/Polen: Die frühmittelalterlichen Emporien im südwestlichen Ostseeraum und ihre Häfen...31–37 Fürstensitz von Vix , Frankreich...38–42 Uruk, Irak: Forschungen im Rahmen der Interpretation und Publikation der Grundlagendaten...43–49 Ancona und Capua, Italien: Die Amphitheater...50–54 Cumae und Paestum, Italien: Hellenistische Heiligtümer in Campanien...55–59 Monte Iato, Italien: Die hellenistisch-römischen Metallfunde...60–62 Rom, Italien: Untersuchungen zur Bau- und Nutzungsgeschichte der Basilica Iulia im urbanistischen Kontext des Forum Romanum...63–69 Rom, Italien: Domus Aurea...70–73 Eh-Sayyeh, Jordanien: Die Arbeiten des Jahres 2015...74–77 Hengsberg/Zlatten, Österreich: Siedlungen und Metalldeponierungen der Urnenfelder- und frühen Hallstattzeit in den Südostalpen...78–80 Palpa, Peru: Neue Forschungen zur Paracas-Kultur (800–200 v. Chr.) im Hochland Süd-Perus...81–92 Ibiza, Spanien: Zum antiken Bleiglanzabbau am Puig de s’Argentera...93–98 Chimtou, Tunesien: Die Arbeiten der Jahre 2014 und 2015...99–109 Chimtou, Tunesien: Die Abschlusspublikation eines umfangreichen Münzfundes aus dem tunesischen Chimtou...110–113 Panormos, Türkei: Die Arbeiten der Jahre 2014 und 2015...114–118 Priene, Türkei: Erfolgreicher Abschluss der Sicherungs- und Konsolidierungsarbeiten am römischen Thermengebäude...119–127 Bezirk Charkov, Ukraine: Die Infrastruktur im Gebiet der Dnepr-Severskij Donec-Wasserscheide in spätrömischer Zeit und zu Beginn der Völkerwanderungszeit...128–131 Berettyóújfal u-Szilhalom, Ungarn: Soziale Transformationen und frühe Metalle – Forschungen zu Neolithikum und Kupferzeit in der Großen Ungarischen Tiefebene...132–136
Honest variable selection in linear and logistic regression models via $\ell_1$ and $\ell_1+\ell_2$ penalization
Creators: name: Bunea, Florentina
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 62J07 (Primary) 62J02, 62G08 (Secondary)

description: This paper investigates correct variable selection in finite samples via $\ell_1$ and $\ell_1+\ell_2$ type penalization schemes. The asymptotic consistency of variable selection immediately follows from this analysis. We focus on logistic and linear regression models. The following questions are central to our paper: given a level of confidence $1-δ$, under which assumptions on the design matrix, for which strength of the signal and for what values of the tuning parameters can we identify the true model at the given level of confidence? Formally, if $\widehat{I}$ is an estimate of the true variable set $I^*$, we study conditions under which $\mathbb{P}(\widehat{I}=I^*)\geq 1-δ$, for a given sample size $n$, number of parameters $M$ and confidence $1-δ$. We show that in identifiable models, both methods can recover coefficients of size $\frac{1}{\sqrt{n}}$, up to small multiplicative constants and logarithmic factors in $M$ and $\frac{1}δ$. The advantage of the $\ell_1+\ell_2$ penalization over the $\ell_1$ is minor for the variable selection problem, for the models we consider here. Whereas the former estimates are unique, and become more stable for highly correlated data matrices as one increases the tuning parameter of the $\ell_2$ part, too large an increase in this parameter value may preclude variable selection.
description: Published in at http://dx.doi.org/10.1214/08-EJS287 the Electronic Journal of Statistics (http://www.i-journals.org/ejs/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Elemental Abundances of the Hot Atmosphere of Luminous Infrared Galaxy Arp 299
Creators: name: Mao, Junjie
name: Zhou, Ping
name: Simionescu, Aurora
name: Su, Yuanyuan
name: Fukazawa, Yasushi
name: Gu, Liyi
name: Akamatsu, Hiroki
name: Zhu, Zhenlin
name: de Plaa, Jelle
name: Mernier, Francois
name: Kaastra, Jelle S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Hot atmospheres of massive galaxies are enriched with metals. Elemental abundances measured in the X-ray band have been used to study the chemical enrichment of supernova remnants, elliptical galaxies, groups and clusters of galaxies. Here we measure the elemental abundances of the hot atmosphere of luminous infrared galaxy Arp 299 observed with XMM-Newton. To measure the abundances in the hot atmosphere, we use a multi-temperature thermal plasma model, which provides a better fit to the Reflection Grating Spectrometer data. The observed Fe/O abundance ratio is subsolar, while those of Ne/O and Mg/O are slightly above solar. Core-collapse supernovae (SNcc) are the dominant metal factory of elements like O, Ne, and Mg. We find some deviations between the observed abundance patterns and theoretical ones from a simple chemical enrichment model. One possible explanation is that massive stars with $M_{\star}\gtrsim23-27~M_{\odot}$ might not explode as SNcc and enrich the hot atmosphere. This is in accordance with the missing massive SNcc progenitors problem, where very massive progenitors $M_{\star}\gtrsim18~M_{\odot}$ of SNcc have not been clearly detected. It is also possible that theoretical SNcc nucleosynthesis yields of Mg/O yields are underestimated.
description: ApJL accepted
Scale-based description and recognition of planar curves
Creators: name: Mokhtarian, Farzin
Publisher: name: University of British Columbia
Year: 2010

description: A method of finding points of inflection on a planar curve at varying levels of detail and combining them to obtain a representation of the curve invariant under rotation, uniform scaling and translation and an algorithm to match two such representations are developed. This technique is applied to register a Landsat aerial image of an area (corrected for skew) to a map containing the shorelines of the same area. The shorelines are extracted from the Landsat image by forming a histogram of the gray-level distribution of pixels in the image and finding the land and water peaks in that histogram. The value at the trough between the two peaks is then used to threshold the image. Contours of dark regions in the resulting binary image are taken to be the shorelines. The Uniform Cost algorithm is used to find the least cost matches of the "scale-space images" of shorelines extracted from the Landsat image and those in the map giving priority to matches at higher levels of scale. A subset of those matches which are consistent are chosen to estimate the parameters of an affine transformation from the image to the map using a least squares method.
Studi, piani e progetti
Creators: name: Vari, Autori
Publisher: name: Territorio della Ricerca su Insediamenti e Ambiente. Rivista internazionale di cultura urbanistica
Year: 2010

description: Territorio della Ricerca su Insediamenti e Ambiente. Rivista internazionale di cultura urbanistica, No 6 (2010): The transversal play of different forms of knowledge in the city design and promotion
title: e-Forschungsberichte, Faszikel 1 (2014)
title: Research E-Papers, Faszikel 1 (2014)
title: Faszikel 1 (2014)
titleType: AlternativeTitle
Creators: name: Deutsches Archäologisches Institut
Publisher: name: Deutsches Archäologisches Institut
Year: 2014

description: Menaggio, Italien. Das Gerichtswesen der Römischen Kaiserzeit. Drei trinationale Forschungskonferenzen an der Villa Vigoni...3–8 Ianus, Berlin: Forschungsdatenzentrum Archäologie & Altertumswissenschaften...9–14 Daschur, Ägypten...15–19 Yeha, Äthiopien...20–25 Apollonia, Albanien. Grabung im Theater von Apollonia...26–29 Llanos de Mojos, Bolivien. Siedlungsplätze im nördlichen Tiefland Boliviens...30–34 Botswana und Südafrika: Baobabs und das Königreich Botswana...35–37 Xinjang, China. Silk Road Fashion...38–42 Trier, Deutschland. Porta Nigra...43–50 Olympia, Griechenland...51–57 Erbil, Irak. Die osmanischen Qaisariya-Gebäude im Basar...58–66 Rom, Italien. Domus Aurea...67–70 Khirbat Yajuz, Jordanien...71–74 Prohear, Kambodscha. Eine Benchmark für das frühe Goldhandwerk in Südostasien...75–77 Kaukasus. Subsistenzwirtschaft und Umweltnutzung in Siedlungen des 6. Jt. v. Chr....78–83 Baalbek, Libanon. Die Entwicklung der Stadt vom 8. Jahrtausend v. Chr. bis in die Gegenwart...84–87 Östliches Rifgebirge, Marokko...88–92 Karabalgasun und Karakorum, Mongolei...93–99 Malaita, Salomonen Inseln. Besiedlungsgeschichte Melanesiens – Vorgeschichte der Salomonen Inseln...100–103 Sahel, Senegal / Niger. Siedlungs- und Wirtschaftsgeschichte in der Eisenzeit und dem Frühmittelalter im Sahel Westafrikas...104–108 Röm. Provinz Baetica, Spanien. Arbeiten zum Corpus Inscriptionum Latinarum II...109–114 Shir, Syrien: Siedlung und Umland des 7. Jts. v. Chr. in der nördlichen Levante...115–119 Torbulok, Tadschikistan. Ein neuentdecktes Heiligtum im hellenistischen Osten...120–124 Chimtou, Tunesien...125–130 Göbekli Tepe, Türkei...131–135 Istanbul, Türkei: Istanbulder Holzhäuser...136–141 Cucuteni-Tripolje, Ukraine. Herausbildung hierarchisch gegliederter Siedlungslandschaften im späten 5. und 4. Jt. v. Chr....142–145
Structure of potentials with $N$ Higgs doublets
Creators: name: Nishi, Celso C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Extensions of the Standard Model with $N$ Higgs doublets are simple extensions presenting a rich mathematical structure. An underlying Minkowski structure emerges from the study of both variable space and parameter space. The former can be completely parametrized in terms of two future lightlike Minkowski vectors with spatial parts forming an angle whose cosine is $-(N-1)^{-1}$. For the parameter space, the Minkowski parametrization enables one to impose sufficient conditions for bounded below potentials, characterize certain classes of local minima and distinguish charge breaking vacua from neutral vacua. A particular class of neutral minima presents a degenerate mass spectrum for the physical charged Higgs bosons.
description: 11 pages. Revtex4. Typos corrected. Few comments added
Magnetic helicity estimations in models and observations of the solar magnetic field. Part IV: Application to solar observations
Creators: name: Thalmann, J. K.
name: Georgoulis, M. K.
name: Liu, Y.
name: Pariat, E.
name: Valori, G.
name: Anfinogentov, S.
name: Chen, F.
name: Guo, Y.
name: Moraitis, K.
name: Yang, S.
name: Mastrano, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: In this ISSI-supported series of studies on magnetic helicity in the Sun, we systematically implement different magnetic helicity calculation methods on high-quality solar magnetogram observations. We apply finite-volume, discrete flux tube (in particular, connectivity-based) and flux-integration methods to data from Hinode's Solar Optical Telescope. The target is NOAA active region 10930 during a ~1.5 day interval in December 2006 that included a major eruptive flare (SOL2006-12-13T02:14X3.4). Finite-volume and connectivity-based methods yield instantaneous budgets of the coronal magnetic helicity, while the flux-integration methods allow an estimate of the accumulated helicity injected through the photosphere. The objectives of our work are twofold: A cross-validation of methods, as well as an interpretation of the complex events leading to the eruption. To the first objective, we find (i) strong agreement among the finite-volume methods, (ii) a moderate agreement between the connectivity-based and finite-volume methods, (iii) an excellent agreement between the flux-integration methods, and (iv) an overall agreement between finite-volume and flux-integration based estimates regarding the predominant sign and magnitude of the helicity. To the second objective, we are confident that the photospheric helicity flux significantly contributed to the coronal helicity budget, and that a right-handed structure erupted from a predominantly left-handed corona during the X-class flare. Overall, we find that the use of different methods to estimate the (accumulated) coronal helicity may be necessary in order to draw a complete picture of an active-region corona, given the careful handling of identified data (preparation) issues, which otherwise would mislead the event analysis and interpretation.
description: Accepted for publication in The Astrophysical Journal, 29 pages, 9 figures
Nonlinear Quantum Cosmology
Creators: name: Nguyen, Le-Huy
name: Parwani, Rajesh R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the effects of an information-theoretically motivated nonlinear correction to the Wheeler-deWitt equation in the minisuperspace scheme for flat, $k=0$, Friedmann-Robertson-Walker (FRW) universes. When the only matter is a cosmological constant, the nonlinearity can provide a barrier that screens the original Big Bang, leading to the quantum creation of a universe through tunneling just as in the $k=1$ case. When the matter is instead a free massless scalar field, the nonlinearity can again prevent a contracting classical universe from reaching zero size by creating a bounce. Our studies here are self-consistent to leading order in perturbation theory for the nonlinear effects.
description: Final Journal version: Further clarification in Introduction and Conclusion. references added. figures same as in version 1