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Dataset for Manuscript "Ultrafast imaging of laser-induced modifications in planar targets via single-shot in-line holography": [research data]
Get PDFWe present a holographic single-shot coherent diffractive imaging method based on in-line holography that allows the ultrafast characterization of 2D transmission maps of semi-transparent planar targets such as foils in amplitude and phase. Holographic information is obtained from the interference of the transmitted primary beam with the fields scattered from the modified or unknown target regions. A specialized iterative phase retrieval is used to incorporate the holographic nature of the approach and to accelerate and improve convergence. The published data contain all data shown in the figures of the paper "Ultrafast imaging of laser-induced modifications in planar targets via single-shot in-line holography"
Simultaneous direct optimal control: a versatile approach for steering quantum molecular dynamics
Get PDFControlling molecular processes by shaped laser pulses is a long-standing goal in Molecular Physics and Chemistry. Here, we suggest a direct optimal control approach based on a simultaneous simulation and optimization paradigm. This approach uses automatic differentiation, offering as advantages final time and model parameter optimization, as well as a wide range of terms in the performance functional and constraints that could be easily implemented in a plug-and-play fashion. The advantages of this approach will be showcased for diverse molecular model systems
Aggregate Data on Gender Equity in the Film Industry in 34 Eurimages Countries (2010-2020): [research data]
No full textThe table provides an overview of the descriptive data of the international research project "Gender Equity Policy Analysis: Assessing, Understanding, and Modeling the Impact of Gender Equity Policies (GEP) in the Film Industry". For the period 2010-2020 (for Germany, the UK and Canada: 2005-2020), 12,107 films from 34 Eurimages countries were analyzed with regard to gender distribution in the three positions of directing, screenwriting and producing
o-Polynomials and Explicit Formula for o-Monomials
Get PDFHyperovals in finite Desarguesian planes of even order q are sets of q+2 points, of which no three are collinear. By association with o-polynomials over binary finite fields, they can be studied algebraically. In this thesis o-polynomials and an equivalence relation based on the equivalence under collineations of the plane are investigated. A second topic is the connection to 2-to-1 polynomials, where explicit formulas for the known o-monomials allow the construction of 2-to-1 binomials. Finally, some generalizations to fields of odd characteristic are made as well
Irreducible polynomials over finite fields for coding and cryptography
Get PDFWe present a closed explicit formula for all generating polynomials of a very popular set of codes - the constacyclic codes over finite fields. This problem is equivalent to the factorization of the polynomial X^n-a into monic irreducible factors over a finite field for all positive integers n. From our explicit formula for this factorization we also derive the factorization of the n-th cyclotomic polynomial and of any composition of the form f(X^n) where f is an irreducible polynomial. Additionally, we present a construction of a large set of irreducible polynomials of the same degree.Wir präsentieren eine geschlossene explizite Formel für die Generatoren einer sehr beliebten Menge von Codes - den konstazyklischen Codes über endlichen Körpern. Dieses Problem ist äquivalent zur Faktorisierung des Polynoms X^n-a in irreduzible Faktoren über einem endlichen Körper für alle positiven Zahlen n. Aus unserer Formel für diese Faktorisierung leiten wir die Faktorisierung der zyklotomischen Polynome und jeder Komposition der Form f(X^n) für ein irreduzibles Polynom f her. Außerdem präsentieren wir eine Konstruktion einer großen Menge von irreduziblen Polynome gleichen Grades
Development of green routes and catalysts for CO2 valorization: synthesis of cyclic carbonates, N-methylamines and N-formamides
Get PDFIn this thesis, reductive and non-reductive catalytic routes for the utilization and valorization of CO2 and other renewable resources are investigated. The focus is on the development of sustainable catalytic systems based on earth abundant metals, organocatalysts and enzymes, that can operate under mild conditions.In dieser Arbeit werden reduktive und nicht-reduktive katalytische Wege zur Nutzung und Wertschöpfung von CO2 und anderen erneuerbaren Ressourcen untersucht. Der Schwerpunkt liegt auf der Entwicklung nachhaltiger katalytischer Systeme auf Basis von leicht verfügbaren Metallen der Erdkruste, Organokatalysatoren und Enzymen, die unter milden Bedingungen arbeiten können
Nutzung regenerativer Energiequellen und Wasserstofftechnik 2024: Tagungsband : 31. Energie-Symposium Nutzung regenerativer Energiequellen und Wasserstofftechnik, Stralsund, 13. bis 15. November 2024
No full textDer Tagungsband zur REGWA Konferenz 2024 fasst die Ergebnisse des 31. Symposiums für "Regenerative Energien und Wasserstofftechnologien" an der Hochschule Stralsund zusammen. Themen wie Wasserstoffanwendungen, erneuerbare Energien, KI-basierte Energiemanagementsysteme und Speichertechnologien bilden den Kern. Praxisprojekte wie emissionsfreie Energiesysteme, die nachhaltige Nutzung biogener Reststoffe und sektorgekoppelte Konzepte werden behandelt, ebenso wie sozioökonomische Aspekte der Energiewende und Herausforderungen beim Aufbau einer Wasserstoffinfrastruktur. Die Beiträge zeigen die interdisziplinäre Forschung und vielfältige Ansätze für eine nachhaltige Energiezukunft.The conference proceedings of the REGWA Conference 2024 summarize the outcomes of the 31st Symposium on "Regenerative Energy and Hydrogen Technologies" at Stralsund University. Key topics include hydrogen applications, renewable energy, AI-based energy management systems, and storage technologies. Practice-oriented projects such as emission-free energy systems, sustainable use of biogenic residues, and sector-coupled concepts are discussed alongside socio-economic aspects of the energy transition and challenges in hydrogen infrastructure development. The contributions highlight interdisciplinary research and diverse approaches to a sustainable energy future