cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Intrusion Prevention through Optimal Stopping
Creators: name: Hammar, Kim
name: Stadler, Rolf
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Cryptography and Security (cs.CR)
subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: We study automated intrusion prevention using reinforcement learning. Following a novel approach, we formulate the problem of intrusion prevention as an (optimal) multiple stopping problem. This formulation gives us insight into the structure of optimal policies, which we show to have threshold properties. For most practical cases, it is not feasible to obtain an optimal defender policy using dynamic programming. We therefore develop a reinforcement learning approach to approximate an optimal threshold policy. We introduce T-SPSA, an efficient reinforcement learning algorithm that learns threshold policies through stochastic approximation. We show that T-SPSA outperforms state-of-the-art algorithms for our use case. Our overall method for learning and validating policies includes two systems: a simulation system where defender policies are incrementally learned and an emulation system where statistics are produced that drive simulation runs and where learned policies are evaluated. We show that this approach can produce effective defender policies for a practical IT infrastructure.
description: Preprint; Submitted to IEEE for review. major revision 1/4 2022. arXiv admin note: substantial text overlap with arXiv:2106.07160
Core size of a random partition for the Plancherel measure
Creators: name: Rostam, Salim
Publisher: name: arXiv
Year: 2021
Subjects: subject: Probability (math.PR)
subject: Combinatorics (math.CO)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 60C05 (Primary) 41A60, 05E10 (Secondary)

description: We prove that the size of the e-core of a partition taken under the Poissonised Plancherel measure converges in distribution to, as the Poisson parameter goes to infinity and after a suitable renormalisation, a sum of e-1 mutually independent Gamma distributions with explicit parameters. Such a result already exists for the uniform measure on the set of partitions of n as n goes to infinity, the parameters of the Gamma distributions being all equal. We rely on the fact that the descent set of a partition is a determinantal point process under the Poissonised Plancherel measure and on a central limit theorem for such processes.
description: 38 pages, 8 figures. To appear in Annales de l'Institut Henri Poincar\'e, Probability and Statistics
title: Für wen brachte Corona einen Digitalisierungsschub? Veränderungen in der Nutzung digitaler Technologien während der COVID-19-Pandemie
Creators: name: Kleinert, Corinna
name: Bächmann, Ann-Christin
name: Schulz, Benjamin
name: Vicari, Basha
name: Ehlert, Martin
Publisher: name: LIfBi Leibniz Institute for Educational Trajectories
Year: 2021
Subjects: subject: COVID-19
subject: NEPS-C
subject: Startkohorte 6

description: Wer macht den Digitalisierungsschub durch die Corona-Pandemie mit und wer gerät möglicherweise ins Hintertreffen? Die Arbeitswelt hat sich durch die Pandemie in kurzer Zeit rasant gewandelt. Viele Jobs erfordern inzwischen den verstärkten Einsatz vernetzter digitaler Technologien. Doch ihre Nutzung hängt stark von der Art der Tätigkeit ab, vom Arbeitsort, den betrieblichen Ressourcen und von individuellen Voraussetzungen. Dieser Bericht zeigt anhand von Daten der Erwachsenenstudie des Nationalen Bildungspanels (NEPS), wie sich die Nutzung digitaler Technologien in den ersten Monaten der Pandemie entwickelte und welche Unterschiede es dabei zwischen verschiedenen Beschäftigtengruppen gibt.
description: NEPS Berichte Corona, No. 6 (2021)
title: NEPS Technical Report for Mathematics: Scaling Results of Starting Cohort 2 in Seventh Grade
Creators: name: Kock, Anna-Lena
name: Litteck, Kristin
name: Petersen, Lara Aylin
Publisher: name: LIfBi Leibniz Institute for Educational Trajectories
Year: 2021
Subjects: subject: item response theory
subject: scaling
subject: mathematical competence
subject: scientific use file

description: The National Educational Panel Study (NEPS) aims at investigating the development of competencies across the whole life span and designs tests for assessing these different competence domains. To evaluate the quality of the competence tests, a wide range of
analyses based on item response theory (IRT) were performed. This paper describes the data and scaling procedure for the mathematical competence test in grade 7 of starting cohort 2 (kindergarten). The mathematics test consists of 28 items that represent different content areas as well as different cognitive components and use different response formats. The test was administered to 2,616 students. A partial-credit model was used for scaling the data. Item fit statistics, differential item functioning, Rasch-homogeneity, and the test´s dimensionality were evaluated to ensure the quality of the test. The results show that the test exhibited a good reliability, good item fit, and that the items satisfactorily fitted the model. Furthermore, test fairness could be confirmed for different subgroups. Limitations of the test were some recognizable gaps at the upper end of the scale’s item difficulties. Overall, the results revealed good psychometric properties of the mathematics test, thus supporting the estimation of a reliable mathematics competence score. Besides the scaling results, this paper also describes the data available in the Scientific Use File and provides the ConQuest syntax for scaling the data as well as the longitudinal linking parameters.
description: NEPS Survey Papers, No. 83 (2021)
title: NEPS Technical Report for Mathematics: Scaling Results for the Additional Study Thuringia
Creators: name: Kock, Anna-Lena
name: Petersen, Lara Aylin
name: Litteck, Kristin
Publisher: name: LIfBi Leibniz Institute for Educational Trajectories
Year: 2021

description: NEPS Survey Papers, No. 84 (2021)
NuClim - Data Management Plan
Creators: name: Aguiar Castro, João
name: Chambers, Scott
name: Paatero, Juha
name: Hataka, Juha
name: Aaltonen, Hermanni
name: Röttger, Stefan
name: Melintescu, Anca
name: Dias, Nuno
name: Anttila, Eemeli
name: Chen, Xuemeng
name: Barbosa, Susana
Publisher: name: Zenodo
Year: 2024
Subjects: subject: Earth Sciences
subject: Atmospheric sciences
subject: Climate Change
subject: DMP

description: This Data Management Plan (DMP) establishes a comprehensive framework for managing data within the NuClim project, ensuring compliance with open science principles while facilitating collaboration among partners. It outlines essential technical and security measures, including restricted access, secure hosting, and data traceability, alongside responsibilities for data management led by the DMP Manager. Guidelines for licensing, file naming conventions, date formatting, and version control are also specified to promote accessibility and effective data organization throughout the project lifecycle.
title: Voluntary Sustainability Standards (VSS) – Mobilising public and private rule-makers in managing global governance
Creators: name: Hernandez, Ariel
name: Reiners, Wulf
name: Grimm, Sven
Publisher: name: German Development Institute / Deutsches Institut für Entwicklungspolitik (DIE)
publisherIdentifier: https://ror.org/01t3zke88
publisherIdentifierScheme: ROR
Year: 2021
Subjects: subject: Agenda 2030
subject: implementation
subject: governance
subject: global governance

description: Voluntary sustainability standards (VSS) offer demand-led or market-based regulatory instruments that can help implement the 2030 Agenda for Sustainable Development. In its activities with key VSS stakeholders from Brazil, China, India, Indonesia, Mexico and South Africa, the Managing Global Governance (MGG) Programme of the German Development Institute / Deutsches Institut für Entwicklungspolitik (DIE) aims to help utilise the transformative potential of VSS.
description: Two Pager, 1/2021
title: The importance of tackling inequality for global poverty
Creators: name: Lakner, Christoph
name: Mahler, Daniel G.
name: Negre, Mario
Publisher: name: German Development Institute / Deutsches Institut für Entwicklungspolitik (DIE)
publisherIdentifier: https://ror.org/01t3zke88
publisherIdentifierScheme: ROR
Year: 2021
Subjects: subject: Agenda 2030
subject: inequality
subject: poverty

description: In recent decades, global extreme poverty has been substantially reduced. While over a third of the world’s population lived below the extreme poverty line (less than $1.90 per day) in 1990, that share had fallen to just 10% by 2015 (World Bank, 2018). This dramatic improvement has shown the world that it is possible to end extreme poverty, and the international development community has thus set itself a goal to do that by 2030. Meanwhile, national inequality has also become a topic of greater focus in the development policy debate in recent years (World Bank, 2016). These two distinct, but connected, issues have been recognised by the international community with inclusion in the Sustainable Development Goals (SDGs), as both a goal to end poverty (SDG 1) and a goal to reduce inequality within countries (SDG 10).
description: Two Pager, 2/2021
title: Managing Global Governance (MGG) und freiwillige Nachhaltigkeitsstandards (VSS) – Die Mobilisierung öffentlicher und privater Entscheidungsträger
Creators: name: Hernandez, Ariel
name: Reiners, Wulf
name: Grimm, Sven
Publisher: name: German Development Institute / Deutsches Institut für Entwicklungspolitik (DIE)
publisherIdentifier: https://ror.org/01t3zke88
publisherIdentifierScheme: ROR
Year: 2021
Subjects: subject: Agenda 2030
subject: governance
subject: global governance

description: Freiwillige Nachhaltigkeitsstandards (VSS) bieten nachfragegesteuerte oder marktbasierte Instrumente, die zur Umsetzung der Agenda 2030 für nachhaltige Entwicklung beitragen können. Durch seine Aktivitäten mit wesentlichen VSS-Stakeholdern aus Brasilien, China, Indien, Indonesien, Maxiko und Südafrika trägt das Managing Global Governance (MGG) Programm des Deutschen Instituts für Entwicklungspolitik (DIE) zur Nutzung des transformativen Potentials der VSS bei.

 Dabei sollen Verfahren zur Festsetzung und Überwachung von Standards Auswirkungen auf die (globale) Wertschöpfungskette haben (UNFSS, 2020, S. 1). VSS definieren Anforderungen, zu denen sich Produzenten, Händler, Hersteller, Einzelhändler und Dienstleister freiwillig ver pflichten und deren Einhaltung überwacht wird. Diese Anforderungen beziehen sich auf eine Vielzahl von Nachhaltigkeitsaspekten, „einschließlich des Respekts für grundlegende Menschenrechte, die Gesundheit und Sicherheit von Arbeiter*innen, die Umweltauswirkungen der Produktion, Beziehungen zum lokalen Umfeld, Raumplanung und anderen“ (UNFSS, 2013, S. 3).
description: Zweiseiter, 1/2021
title: The untapped potential of global climate funds for investing in social protection
Creators: name: Aleksandrova, Mariya
Publisher: name: German Development Institute / Deutsches Institut für Entwicklungspolitik (DIE)
publisherIdentifier: https://ror.org/01t3zke88
publisherIdentifierScheme: ROR
Year: 2021

description: Briefing Paper, 7/2021
REVOLUTIONIZING EDUCATION: THE SEO-FRIENDLY EDUCATION FOR ALL
Creators: name: Moaz, Ahmed Butt
name: Saad, Masood Butt
name: Azura, Abdul Rahman
Publisher: name: SADI JOURNALS
Year: 2024
Subjects: Web 2.0, digital learning, information access, online resources, social media

description: In the age of Web 2.0, the digital landscape has transformed the way student’s access, process, and share information. The ease of navigating the internet, from searching for definitions to solving complex problems, has revolutionized learning. Students no longer rely solely on traditional sources like books and libraries. Wikipedia offers instant insights into diverse subjects, and virtual tours enable exploration of far-flung destinations. Online platforms, especially YouTube, provide tutorials for mastering various skills and arts. Social media has become a global meeting place, connecting individuals, fostering community engagement, and stimulating discussions in forums and groups. News is no longer confined to print media; it pervades every online space, from social media platforms to dedicated websites and discussion forums
title: COVID-19 and conservation: crisis response strategies that benefit people and nature
Creators: name: Lehmann, Ina
name: Rodrígez, Jean Carlo
name: Spenceley, Anna
Publisher: name: German Development Institute / Deutsches Institut für Entwicklungspolitik (DIE)
publisherIdentifier: https://ror.org/01t3zke88
publisherIdentifierScheme: ROR
Year: 2021

description: Briefing Paper, 8/2021
title: Towards Jewish-Arab normalization in Israel
title: Israeli Arabs want a more pragmatic politics while Jewish parties court the Arab vote
titleType: Subtitle
Creators: name: Averbukh, Lidia
name: Stiftung Wissenschaft Und Politik
Publisher: name: Stiftung Wissenschaft und Politik (SWP), German Institute for International and Security Affairs
Year: 2021

description: SWP Comment, 18/2021
title: The conference on the future of Europe
title: obstacles and opportunities to a European reform initiative that goes beyond crisis management
titleType: Subtitle
Creators: name: Von Ondarza, Nicolai
name: Ålander, Minna
name: Stiftung Wissenschaft Und Politik
Publisher: name: Stiftung Wissenschaft und Politik (SWP), German Institute for International and Security Affairs
Year: 2021

description: SWP Comment, 19/2021
title: Reuters Digital News Survey 2014: Ergebnisse für Deutschland
Creators: name: Hölig, Sascha
name: Hasebrink, Uwe
Publisher: name: SSOAR -   GESIS Leibniz Institute for the Social Sciences
Year: 2014
Subjects: subject: 1080407 Impact Research, Recipient Research
subject: news
subject: utilization
subject: Federal Republic of Germany
subject: online media
subject: willingness to pay

description: Die technischen Geräte sowie die Dienste, die zur Nutzung von Nachrichten verwendet werden können, differenzieren sich weiter aus; zugleich konvergieren die verschiedenen Optionen zur Nachrichtennutzung, indem mit einem einzigen Endgerät ganz unterschiedliche Dienstetypen genutzt werden können. Für den Reuters Institute Digital News Survey, den das in Oxford ansässige Reuters Institute for the Study of Journalism im Jahr 2012 zum ersten Mal durchgeführt hat, werden zeitgleich Befragungen im Vereinigten Königreich, in Brasilien, Dänemark, Deutschland, Frankreich, Italien, Japan, Spanien und den USA realisiert, um generelle Trends, aber auch nationale Besonderheiten erkennen zu können. Das Hans-Bredow-Institut ist seit 2013 als Kooperationspartner verantwortlich für die deutsche Teilstudie; es wird dabei unterstützt von den Landesmedienanstalten.
description: Arbeitspapiere des Hans-Bredow-Instituts, 32, 26 S.
title: The next steps for EU counterterrorism policy
title: evolving threats of Jihadism, right-wing extremism, and transatlantic cooperation
titleType: Subtitle
Creators: name: Bossong, Raphael
name: Stiftung Wissenschaft Und Politik
Publisher: name: Stiftung Wissenschaft und Politik (SWP), German Institute for International and Security Affairs
Year: 2021

description: SWP Comment, 20/2021
title: Außenpolitische Think-Tanks in Krisenzeiten
title: zu Selbstverständnis und Relevanz von Denkfabriken : Debattenbeiträge seit 2017
titleType: Subtitle
Creators: name: Lux, Nicolas
name: Stiftung Wissenschaft Und Politik
Publisher: name: Stiftung Wissenschaft und Politik (SWP), German Institute for International and Security Affairs
Year: 2021

description: SWP-Zeitschriftenschau, 1/2021
title: Foreign policy think tanks in times of crisis
title: how do they see themselves and their relevance? : contributions to the debate since 2017
titleType: Subtitle
Creators: name: Lux, Nicolas
name: Stiftung Wissenschaft Und Politik
Publisher: name: Stiftung Wissenschaft und Politik (SWP), German Institute for International and Security Affairs
Year: 2021

description: SWP Journal Review, 1/2021
title: Jugendschutzsoftware im Elternhaus: Kenntnisse, Erwartungen und Nutzung; Stand der Forschung
Creators: name: Dreyer, Stephan
name: Hajok, Daniel
name: Hasebrink, Uwe
name: Lampert, Claudia
Publisher: name: SSOAR -   GESIS Leibniz Institute for the Social Sciences
Year: 2012
Subjects: subject: 10210 Sociology of the Youth, Sociology of Childhood
subject: 1080404 Interactive, electronic Media
subject: protection of minors
subject: software
subject: parental home
subject: expectation
subject: utilization
subject: Federal Republic of Germany
subject: child protection
subject: parents
subject: legal factors
subject: digital media

description: Arbeitspapiere des Hans-Bredow-Instituts, 23, 43 S.
title: Entwicklungspfade für ein netzwerkgerechtes Jugendmedienschutzrecht
Creators: name: Dreyer, Stephan
Publisher: name: SSOAR -   GESIS Leibniz Institute for the Social Sciences
Year: 2011
Subjects: subject: 1080411 Media Politics, Media Law
subject: 10210 Sociology of the Youth, Sociology of Childhood
subject: protection of minors
subject: European Law
subject: underage
subject: media
subject: utilization
subject: media skills
subject: statuary regulation

description: Arbeitspapiere des Hans-Bredow-Instituts, 22, 19 S.
title: Kreativität und Urheberrecht in der Netzökonomie: eine wissenschaftliche Innovationswerkstatt im Dialog mit der Medienwirtschaft; Ergebnisse
Creators: name: Schulz, Wolfgang
Publisher: name: SSOAR -   GESIS Leibniz Institute for the Social Sciences
Year: 2010
Subjects: subject: 1080411 Media Politics, Media Law
subject: creativity
subject: copyright
subject: Internet
subject: media industry
subject: media law
subject: online media

description: Arbeitspapiere des Hans-Bredow-Instituts, 21, 60 S.
title: Kreativität und Urheberrecht in der Netzökonomie: eine wissenschaftliche Innovationswerkstatt im Dialog mit der Medienwirtschaft; 1. Analysepapier, Januar 2010
Creators: name: Schulz, Wolfgang
name: Büchner, Thomas
Publisher: name: SSOAR -   GESIS Leibniz Institute for the Social Sciences
Year: 2010
Subjects: subject: 1080411 Media Politics, Media Law
subject: creativity
subject: copyright
subject: Internet
subject: media industry
subject: media law
subject: online media

description: Arbeitspapiere des Hans-Bredow-Instituts, 20, 12 S.
title: Neue Handelsabkommen in Asien
title: Liberalisierung in Zeiten geopolitischer Rivalität
titleType: Subtitle
Creators: name: Hilpert, Hanns Günther
name: Stiftung Wissenschaft Und Politik
Publisher: name: Stiftung Wissenschaft und Politik (SWP), German Institute for International and Security Affairs
Year: 2021

description: SWP-Aktuell, 23/2021
title: Das Corona-Schuldenproblem in der Eurozone
title: Grenzen der Stabilisierung durch die Geldpolitik und die Suche nach Alternativen
titleType: Subtitle
Creators: name: Tokarski, Paweł
name: Wiedmann, Alexander
name: Stiftung Wissenschaft Und Politik
Publisher: name: Stiftung Wissenschaft und Politik (SWP), German Institute for International and Security Affairs
Year: 2021

description: SWP-Aktuell, 24/2021
title: Responsibility in supply chains
title: Germany's due diligence act is a good start
titleType: Subtitle
Creators: name: Maihold, Günther
name: Müller, Melanie
name: Saulich, Christina
name: Schöneich, Svenja
name: Stiftung Wissenschaft Und Politik
Publisher: name: Stiftung Wissenschaft und Politik (SWP), German Institute for International and Security Affairs
Year: 2021

description: SWP Comment, 21/2021
MPEC 2024-L141 : 2024 LP4
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 LP4

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Unsupervised Time Series Outlier Detection with Diversity-Driven Convolutional Ensembles -- Extended Version
Creators: name: Campos, David
name: Kieu, Tung
name: Guo, Chenjuan
name: Huang, Feiteng
name: Zheng, Kai
name: Yang, Bin
name: Jensen, Christian S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: With the sweeping digitalization of societal, medical, industrial, and scientific processes, sensing technologies are being deployed that produce increasing volumes of time series data, thus fueling a plethora of new or improved applications. In this setting, outlier detection is frequently important, and while solutions based on neural networks exist, they leave room for improvement in terms of both accuracy and efficiency. With the objective of achieving such improvements, we propose a diversity-driven, convolutional ensemble. To improve accuracy, the ensemble employs multiple basic outlier detection models built on convolutional sequence-to-sequence autoencoders that can capture temporal dependencies in time series. Further, a novel diversity-driven training method maintains diversity among the basic models, with the aim of improving the ensemble's accuracy. To improve efficiency, the approach enables a high degree of parallelism during training. In addition, it is able to transfer some model parameters from one basic model to another, which reduces training time. We report on extensive experiments using real-world multivariate time series that offer insight into the design choices underlying the new approach and offer evidence that it is capable of improved accuracy and efficiency. This is an extended version of "Unsupervised Time Series Outlier Detection with Diversity-Driven Convolutional Ensembles", to appear in PVLDB 2022.
description: 14 pages. An extended version of "Unsupervised Time Series Outlier Detection with Diversity-Driven Convolutional Ensembles", to appear in PVLDB 2022
title: Adapting Public Service to the Multiplatform Scenario: Challenges, Opportunities and Risks: Final Report of the Project "Redeﬁning and Repositioning Public Service Broadcasting in the Digital and Multiplatform Scenario: Agents and Strategies"
Creators: name: Suárez Candel, Roberto
Publisher: name: SSOAR -   GESIS Leibniz Institute for the Social Sciences
Year: 2012
Subjects: subject: 1080401 Broadcasting, Telecommunication
subject: 1080404 Interactive, electronic Media
subject: public institution
subject: broadcasting
subject: digitalization
subject: media
subject: public interest
subject: competition
subject: online media

description: Arbeitspapiere des Hans-Bredow-Instituts, 25, 84 S.
title: Istanbuler Mitteilungen, Bd. 67 (2017): Istanbuler Mitteilungen
title: Istanbuler Mitteilungen
titleType: AlternativeTitle
Creators: name: Istanbuler Mitteilungen
Publisher: name: Istanbuler Mitteilungen
Year: 2024

description: [PDFs verfügbar]
description: Der sogenannte Caracalla-Tempel von Pergamon – ein Bau zu Ehren Hadrians und seiner Gattin Sabina...187–236
Preliminary Qualitative Elemental Characterization of Painted Plaster Pigments from a Roman structure at Boğazköy-Hattuša using pXRF...359–372
The Decline and Afterlife of the Roman Entablature...237–328
Report of the new Findings from Byzantine Istanbul...329–356
Didyma von oben...373–380
Die Siedlungsgeschichte Pergamons – Überblick und kritische Revision...43–130
Kapitelle vom Kyma recta-Typus (›tuskanische‹ Kapitelle?) im hellenistischen Pergamon und in Kleinasien...131–185
Kunsthandwerkliche Motive unterschiedlicher Provenienz in der zyprisch-griechischen Kleinplastik der 1. Hälfte des 6. Jhs. v. Chr....5–42
Quadrupolar active stress induces exotic phases of defect motion in active nematics
Creators: name: Sultan, Salik A.
name: Nejad, Mehrana R.
name: Doostmohammadi, Amin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: A wide range of living and artificial active matter exists in close contact with substrates and under strong confinement, where in addition to dipolar active stresses, quadrupolar active stresses can become important. Here, we numerically investigate the impact of quadrupolar non-equilibrium stresses on the emergent patterns of self-organisation in non-momentum conserving active nematics. Our results reveal that beyond having stabilising effects, the quadrupolar active forces can induce various modes of topological defect motion in active nematics. In particular, we find the emergence of both polar and nematic ordering of the defects, as well as new phases of self-organisation that comprise topological defect chains and topological defect asters. The results contribute to further understanding of emergent patterns of collective motion and non-equilibrium self-organisation in active matter.
title: Kuba versucht wieder einen Neubeginn
title: internationale Impulse zur Überwindung externer und interner Blockaden
titleType: Subtitle
Creators: name: Maihold, Günther
name: Stiftung Wissenschaft Und Politik
Publisher: name: Stiftung Wissenschaft und Politik (SWP), German Institute for International and Security Affairs
Year: 2021

description: SWP-Aktuell, 25/2021
Theoretical Investigations in Photoionization: Ultra-fast Pulses in Noble Gases, Core Excitations in Ytterbium and Relativistic Systems
Creators: name: Alarcon, Miguel A
Publisher: name: Purdue University Graduate School
Year: 2024
Subjects: classificationCode: 510201
subject: Atomic and molecular physics

description: This dissertation discusses theoretical methods for describing photoionization in different systems in the context of time-dependent and time-independent non-relativistic and time-independent relativistic systems. We introduce a multichannel quantum defect theory (MQDT) model for describing photoionization in the context of pump-probe experiments. The basics of MQDT are introduced and specialized to the argon atom. Two energy regimes are studied in detail and compared to the experiment: (i) a perturbative calculation describing the dynamics of an autoionizing wave packet, (ii) a time-resolved calculation describing the two-photon ionization of a deeply bound wave packet. In both cases, the model accurately describes the relative ionization with respect to the two spin-orbit split thresholds of the ion and the oscillations shown in the delay between the pump and probe. We finalize with a brief presentation, which is primarily pedagogical, of how to use MQDT inside a finite box.
Next, we use MQDT to describe the ytterbium atom in different energy regimes and varying degrees of approximation. The motivation behind this lies in the context of quantum information science, but our study is only concerned with calculating atomic properties. We start with a minimal MQDT model to describe the data observed in the experiment, followed by the presentation of an ab initio two-electron model. Both models compare very well to the experiment, and the ab initio method compares favorably with older spectroscopic results. In addition, we show unpublished results that incorporate the hyper-fine effects into the approximate model.
Finally, we present an implementation of the two-electron variational R-matrix method for the Dirac equation, including the complete derivation of the solution of the Dirac equation in a central potential. We provide explicit analytic forms for the solutions of the Coulomb potential and use them to derive the generalized quantum defect parameters. A discussion of the variational R-matrix method for the Dirac equation in single and multichannel contexts is presented, with sample calculations for the beryllium and radium atoms. A chapter that summarizes and points to future work for each one of the projects concludes the work.
Directed Motion of Liquid Crystal Skyrmions With Oscillating Fields
Creators: name: Duzgun, A.
name: Nisoli, C.
name: Reichhardt, C. J. O.
name: Reichhardt, C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Using continuum simulations, we show that under a sinusoidal electric field, liquid crystal skyrmions undergo periodic shape oscillations which produce controlled directed motion. The speed of the skyrmion is non-monotonic in the frequency of the applied field, and exhibits multiple reversals of the motion as a function of changing frequency. We map out the dynamical regime diagram of the forward and reverse motion for two superimposed ac driving frequencies, and show that the reversals and directed motion can occur even when only a single ac driving frequency is present. Using pulsed ac driving, we demonstrate that the motion arises due to an asymmetry in the relaxation times of the skyrmion shape. We discuss the connection between our results and ratchet effects observed in systems without asymmetric substrates.
description: 10 pages, 6 figures
title: Das palästinensische Superwahljahr
title: Bedeutung, Herausforderungen und europäische Handlungsoptionen
titleType: Subtitle
Creators: name: Asseburg, Muriel
name: Stiftung Wissenschaft Und Politik
Publisher: name: Stiftung Wissenschaft und Politik (SWP), German Institute for International and Security Affairs
Year: 2021

description: SWP-Aktuell, 26/2021
title: Patt in Georgien
title: politische Krise und regionale Veränderungen verlangen Antworten der EU
titleType: Subtitle
Creators: name: Smolnik, Franziska
name: Sarjveladze, Mikheil
name: Tadumadze, Giorgi
name: Stiftung Wissenschaft Und Politik
Publisher: name: Stiftung Wissenschaft und Politik (SWP), German Institute for International and Security Affairs
Year: 2021

description: SWP-Aktuell, 27/2021
Bread Wheat (Triticum aestivum L.) Variety Development, Release and Registration for Rainfed Areas of Ethiopia
Creators: name: Demeke Z.
name: Alemu D.
name: Rut D.
name: Gadisa A.
name: Negash G.
name: Berhanu S.
name: Abebe D.
name: Tafesse S.
name: Habtemariam Z.
name: Tamirat N.
name: Abebe G.
name: Dawit A.
name: Bayisa A.
name: Zerihun T.
name: Yewubdar S.
Publisher: name: gjrpublication
Year: 2024

description: A strong variety development is the backbone of a well-established national seed program and identification of high-yielding genotypes with wide adaptation and resistance to biotic and abiotic stresses remain the top priorities of the wheat breeding programs. Over the years of research on bread wheat, commendable achievements have been made in the generation of technologies and information useful for boosting the productivity and production of wheat in Ethiopia. Five improved bread wheat varieties; Deka, Balcha, Boru, Dursa, Shaki, Biftu and kulumsa were developed from CIMMYT materials and released in 2018, 2019, 2020, 2020, 2021, 2022 and 2023 respectively for wheat growing areas of Ethiopia. In addition, one improved bread wheat variety (Abay) has been released in 2021 from ICARDA materials for low-midland agro-ecologies. In these varietal development two breeding components (germplasm enhancements (hybridization and selection, introduction, evaluation, and selection) and varietal development (ON, PVT, NVT, and VVT) were considered. The new variety Deka was tested along with three checks (Ogolcho, Hawi, and Kingbird) in eight environments from 2015-2016 and Balcha from 2016-2017 with Ogolcho and Kakaba in eight environments. During the 2017-2018 main cropping season newly released bread wheat varieties Boru (with Wane and Hidasse) and Dursa (with Ogolcho and Kakaba) were tested at eleven locations and four locations respectively. Also, Abay was tested with Deka and Ogolcho as a check, and Shaki was tested with Wane and Lemu during the 2018-2019 cropping season. The two years of data of NVT combined over locations and years provide the newly released varieties showed superior grain yield performance, stability, and wide adaptation. The six newly released varieties have been demonstrated and are being cultivated by farmers for production purposes. Hence, the cultivation of newly released improved bread wheat varieties Balcha, Dursa, and Abay in the low- midland agro-ecologies, Deka in the midland while, Boru and Shaki in mid-highland wheat-growing agroecologies.
Active Rheology and Anti-Commensuration Effects For Driven Probe Particles on Two Dimensional Periodic Pinning Substrates
Creators: name: Reichhardt, C. J. O.
name: Reichhardt, C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: For an assembly of particles interacting with a two dimensional periodic substrate, a series of commensuration effects can arise when the number of particles is an integer multiple of the number of substrate minima. Such commensuration effects can appear for vortices in type-II superconductors with periodic pinning or for colloidal particles on optical landscapes. Under bulk external driving, the pinning or drag on the particles is strongly enhanced at commensuration. Here we consider the active rheology of a single particle driven through an assembly of particles coupled to a periodic substrate at different commensurate conditions. For increasing density at fixed driving force, we observe nonmonotonic drag along with what we call an anti-commensuration effect where the drag or pinning effectiveness is reduced in commensurate states, opposite from the behavior typically observed under bulk driving. The velocity enhancement or drag reduction appears when the background particles form a crystalline state that is coupled more strongly to the substrate than to the driven particle, while under incommensurate conditions, the background particles are disordered and produce enhanced drag on the probe particle. The velocity noise of the driven particle has a narrow band signature at commensuration and a broad band signature away from commensuration. We map out the regions in which viscous flow, periodic flow, and a pinned phase appear. We show that the effects we observe are robust on both square and triangular substrate arrays and for both vortices in type-II superconductors and colloidal particles on optical landscapes.
description: 15 pages, 19 figures
Towards the Integration Support for Machine Learning of Inter-Model Relations in Model Views
Creators: name: Pontes Miranda, James
name: Bruneliere, Hugo
name: Tisi, Massimo
name: Sunyé, Gerson
Publisher: name: Zenodo
Year: 2024
Subjects: subject: Electrical engineering, electronic engineering, information engineering
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: Machine learning
subject: Views

description: Model-driven engineering (MDE) supports the engineering of complex systems via multiple models representing various systems’ aspects. These interrelated models are usually heterogeneous and often specified using complementary modeling languages. Whenever needed, model view solutions can be employed to federate these models in a more transparent way. To do so, the required inter-model links can sometimes be automatically computed via explicitly written matching rules. However, in some cases,  matching rules would be too complex (or even impossible) to write. Thus, some inter-model links may be inferred by analyzing previous examples instead. In this paper, we introduce a Machine Learning (ML)-backed approach for expressing and computing such model views. Notably, we aim to make the use of ML as simple as possible in this context. To this end, we propose to refine and extend the ViewPoint Definition Language (VPDL) from the EMF Views model view solution to integrate the use of dedicated Heterogeneous Graph Neural Networks (HGNNs). These view-specific HGNNs can be trained with appropriate sets of contributing models before being used for inferring links to be added to the views.
title: The Corona debt conundrum in the Eurozone
title: limits to stabilisation by monetary policy and the search for alternatives
titleType: Subtitle
Creators: name: Tokarski, Paweł
name: Wiedmann, Alexander
name: Stiftung Wissenschaft Und Politik
Publisher: name: Stiftung Wissenschaft und Politik (SWP), German Institute for International and Security Affairs
Year: 2021

description: SWP Comment, 23/2021
MILLIY OʻQUV DASTURINI AMALGA TADBIQ ETISH, FANLARNI INTEGRATSIYALASHTIRISH
Creators: name: Elmuratova, Dilrabo
Publisher: name: Zenodo
Year: 2024

description: Ushbu maqolada milliy o`quv dasturlari doirasida fanlarni integratsiyalash masalalari, fanlarni o`qitishning yangicha usullarini optimallashtirish masalalari muhokama etiladi.
title: Indien: ein ambivalenter Partner für den Westen
title: wachsende Gemeinsamkeiten, wachsende Differenzen
titleType: Subtitle
Creators: name: Wagner, Christian
name: Lemke, Jana
name: Stiftung Wissenschaft Und Politik
Publisher: name: Stiftung Wissenschaft und Politik (SWP), German Institute for International and Security Affairs
Year: 2021

description: SWP-Aktuell, 28/2021
Trend: United Nations (2024-08-20). Sustainable Development Goals Indicators Database: Goal 2. End hunger, achieve food security and improved nutrition and promote sustainable agriculture | Malawi | 2.5 | 2.5.1 Number of transboundary breeds (including extinct ones) | No Variables, 2000 - 2024. Sage Data. Sage Publishing Ltd. (Dataset). Dataset-ID: 072-009-002
Creators: name: United Nations
Publisher: name: Sage Data. Sage Publishing Ltd
Year: 2024
Subjects: Agricultural Development
Economic Development
Food Security
Social Development

description: Each goal set in the Sustainable Development Goals (SDG) framework expresses a commitment. For each goal, targets are set that represent an outcome (i.e., a quantified sub-component of a goal that will contribute to achievement of the goal). For each target, indicator(s) are defined that measure if a target is being met. Indicators are disaggregated, where relevant, by income, sex, age, geographic location, or other characteristics. Goals, targets, and indicators are linked by a 3-tier code (e.g., Goal 1, Target 1.1, and Indicator 1.1.1). Reported here are metrics assessing progress toward achievement of Goal 2. End hunger, achieve food security and improved nutrition and promote sustainable agriculture. For the complete text of goals, targets, and indicators, please visit https://dataplanet.sagepub.com/docs/un-sdg/Global%20Indicator%20Framework%20after%202022%20refinement_Eng.pdf
Exact augmented Lagrangians for constrained optimization problems in Hilbert spaces I: Theory
Creators: name: Dolgopolik, M. V.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: In this two-part study, we develop a general theory of the so-called exact augmented Lagrangians for constrained optimization problems in Hilbert spaces. In contrast to traditional nonsmooth exact penalty functions, these augmented Lagrangians are continuously differentiable for smooth problems and do not suffer from the Maratos effect, which makes them especially appealing for applications in numerical optimization. Our aim is to present a detailed study of various theoretical properties of exact augmented Lagrangians and discuss several applications of these functions to constrained variational problems, problems with PDE constraints, and optimal control problems.
 The first paper is devoted to a theoretical analysis of an exact augmented Lagrangian for optimization problems in Hilbert spaces. We obtain several useful estimates of this augmented Lagrangian and its gradient, and present several types of sufficient conditions for KKT-points of a constrained problem corresponding to locally/globally optimal solutions to be local/global minimisers of the exact augmented Lagrangian.
Commensuration Effects on Skyrmion Hall Angle and Drag for Manipulation of Skyrmions on Two-Dimensional Periodic Substrates
Creators: name: Reichhardt, C.
name: Reichhardt, C. J. O.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We examine the dynamics of an individually driven skyrmion moving through a background lattice of skyrmions coupled to a 2D periodic substrate as we vary the ratio of the number of skyrmions to the number of pinning sites across commensurate and incommensurate conditions. As the skyrmion density increases, the skyrmion Hall angle is nonmonotonic, dropping to low or zero values in commensurate states and rising to an enhanced value in incommensurate states. Under commensuration, the driven skyrmion is channeled by a symmetry direction of the pinning array and exhibits an increased velocity. The velocity fluctuations have a narrow band signature at fillings where the skyrmion Hall angle is zero, while for incommensurate fillings, the skyrmion motion is disordered and the velocity noise is broad band. Under commensurate conditions, multi-step depinning transitions appear and the skyrmion Hall angle is zero at low drives but becomes finite at higher drives, while incommensurate fillings have a single depinning transition. As the Magnus force increases, commensuration velocity peaks cross over to dips, and new directional locking angles appear. At large Magnus forces, particularly at commensurate fillings, a velocity boost can occur in which the skyrmion moves faster than the applied drive due to the alignment of the Magnus-induced velocity with the driving direction. Increase the Magnus force can produce regimes of enhanced pinning when the skyrmion is forced to move along a non-symmetry direction of the periodic pinning array. This is in contrast to systems with random pinning, where increasing the Magnus force generally reduces the pinning effect. We demonstrate these dynamics for both square and triangular substrates, and map out the different regimes as a function of filling fraction, pinning force, and the strength of the Magnus force in a series of dynamic phase diagrams.
description: 17 pages, 24 figures
title: Quadratur des Kreises im Indo-Pazifik
title: sicherheitspolitische Umsetzung der Indo-Pazifik-Leitlinien
titleType: Subtitle
Creators: name: Swistek, Göran
name: Stiftung Wissenschaft Und Politik
Publisher: name: Stiftung Wissenschaft und Politik (SWP), German Institute for International and Security Affairs
Year: 2021

description: SWP-Aktuell, 29/2021
Non-contact Andreev reflection as a direct probe of superconductivity on the atomic scale
Creators: name: Ko, Wonhee
name: Lado, Jose L.
name: Maksymovych, Petro
Publisher: name: arXiv
Year: 2022
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Direct detection of superconductivity has long been a key strength of point-contact Andreev reflection. However, its applicability to atomic-scale imaging is limited by the mechanical contact of the Andreev probe. To this end, we present a new method to probe Andreev reflection in a tunnel junction, leveraging tunneling spectroscopy and junction tunability to achieve quantitative detection of Andreev scattering. This method enables unambiguous assignment of superconducting origins of current-carrying excitations as well as detection of higher order Andreev processes in atomic-scale junctions. We furthermore revealed distinct sensitivity of Andreev reflection to natural defects, such as step edges, even in classical superconductors. The methodology opens a new path to nanoand atomic-scale imaging of superconducting properties, including disordered superconductors and proximity to phase transitions.
title: Visual time & strategy project planning.
title: How to visually represent a proposal drafting in terms of structure and time
titleType: AlternativeTitle
Creators: name: Erica, Lavagno
name: Sciortino, Marco
Publisher: name: Zenodo
Year: 2024

description: The draft planning of a project depends on many factors.  Some may be subjective:

-experience of the researcher in preparing proposals;

- knowledge of the call for proposals

- network of researchers and companies as potential partners

and influence the natural course the proposal takes and how the planning and writing activities weave together.

Other aspects represent, besides, the strict framework where the project idea must be developed:

- structuring the proposal as project-effective (and not paper-effective, for instance)

- gathering information from partners

- being consistent with the call’s terms of reference

The goal of this poster is to provide a reference method for activity deployment during the proposal preparation:

·         administrative activities

·         writing aspects

·         budgeting issues

·         consortium management

 to strategically sketch a project idea and meet the proposal submission deadline in time.
title: Frankreichs Außen- und Sicherheitspolitik unter Präsident Macron
title: Konsequenzen für die deutsch-französische Zusammenarbeit
titleType: Subtitle
Creators: name: Kempin, Ronja
name: Stiftung Wissenschaft Und Politik
Publisher: name: Stiftung Wissenschaft und Politik (SWP), German Institute for International and Security Affairs
Year: 2021

description: SWP-Studie, 4/2021
THE PERVASIVE PRESENCE OF SOCIAL MEDIA IN NIGERIAN SOUTHEASTERN UNIVERSITIES
Creators: name: Veronica, O. Abolo
name: Samuel, A. Johnson
Publisher: name: SADI JOURNALS
Year: 2024
Subjects: Social media, university students, online communication, learning tools, social interaction

description: The proliferation of social media has transformed the way students engage with technology and communication. This study examines the multifaceted role of social media in the lives of university students, encompassing both its positive and negative impacts. As students increasingly embrace platforms like Facebook, Instagram, and Twitter, the boundaries between social interaction, information consumption, and learning are blurred. This research investigates the various ways in which social media is utilized by students and its influence on their academic and personal lives. It explores the potential benefits, such as information sharing and collaborative learning, as well as the darker side of social media, involving issues like addiction, cyberbullying, and criminal activities. The findings provide valuable insights into the complex relationship between students and social media, shedding light on its multifaceted role in the modern educational landscape
Reversible to Irreversible Transitions for Cyclically Driven Disks on Periodic Obstacle Arrays
Creators: name: Reichhardt, C.
name: Reichhardt, C. J. O.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We examine the collective dynamics of disks moving through a square array of obstacles under cyclic square wave driving. Below a critical density we find that system organizes into a reversible state in which the disks return to the same positions at the end of every drive cycle. Above this density, the dynamics are irreversible and the disks do not return to the same positions after each cycle. The critical density depends strongly on the angle $θ$ between the driving direction and a symmetry axis of the obstacle array, with the highest critical densities appearing at commensurate angles such as $θ=0^\circ$ and $θ=45^\circ$ and the lowest critical densities falling at $θ= \arctan(0.618)$, the inverse of the golden ratio, where the flow is the most frustrated. As the density increases, the number of cycles required to reach a reversible state grows as a power law with an exponent near $ν=1.36$, similar to what is found in periodically driven colloidal and superconducting vortex systems.
description: 6 pages, 10 postscript figures