cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Μοντελοποίηση τάσεων στη διαχείριση απορριμμάτων στις εγκαταστάσεις της ΔΕΔΙΣΑ
title: Modeling trends in waste management at DEDISA facilities
Creators: name: Δεναξας Μιχαηλ-Αγγελος
Publisher: name: Technical University of Crete
Year: 2023

description: Είναι γεγονός ότι η διαχείριση των αποβλήτων τα τελευταία χρόνια αποτελεί σημαντικό κομμάτι της κοινωνίας. Πλέον στην Ελλάδα πέρα από τους κρατικούς φορείς υπάρχουν και ιδιωτικές εταιρείες ανακύκλωσης που έχουν ως κύριο στόχο την εφαρμογή των κανονισμών της ΕΕ και τους νόμους του κράτους για την αξιοποίηση αυτών των υλικών και τη μικρότερη επιβλαβή επίπτωση στο περιβάλλον. Μία τέτοια σημαντική προσπάθεια αποτελεί και η ΔΕΔΙΣΑ Χανίων, όπου θεωρείται μία από τις καλύτερες σε πανελλαδικό επίπεδο. Στόχος αυτής της εργασίας είναι η παρουσίαση των τάσεων των απορριμμάτων στην ευρύτερη περιοχή της Κρήτης.
Στο πρώτο κεφάλαιο θα περιγραφούν εισαγωγικές έννοιες της ανακύκλωσης, τα είδη αυτής καθώς και οι στρατηγικές της ΕΕ.
Στο επόμενο κεφάλαιο παρουσιάζονται οι εταιρείες ανακύκλωσης που δραστηριοποιούνται στην Ελλάδα, ενώ αναλύεται διεξοδικά η ΔΕΔΙΣΑ Χανίων.
Ακολουθεί η επεξεργασία των δεδομένων με τη βοήθεια του προγράμματος Minitab και η συζήτηση των αποτελεσμάτων.
Τέλος παρατίθενται τα συμπεράσματα και η βιβλιογραφία.

description: It is a fact that waste management has been an important part of society in recent years. Nowadays in Greece, in addition to state agencies, there are also private recycling companies whose main goal is to implement EU regulations and state laws for the utilization of these materials and the least harmful impact on the environment. Such an important effort is also DEDISA Chania, where it is considered one of the best at a nationwide level. The aim of this work is to present the waste trends in the wider area of Crete.
In the first chapter, introductory concepts of recycling, its types, as well as EU strategies will be described. In the next chapter, the recycling companies active in Greece are presented, while DEDISA of Chania is thoroughly analyzed. This is followed by the processing of the data using the Minitab program and the discussion of the results.
Finally, the conclusions and the bibliography are listed.
Resonant Leptogenesis with nonholomorphic R-Parity violation and LHC Phenomenology
Creators: name: Chakrabortty, Joydeep
name: Roy, Sourov
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In R-parity violating supersymmetric models both leptogenesis and the correct neutrino masses are hard to achieve together. The presence of certain soft nonholomorphic R-parity violating terms helps to resolve this problem. We consider a scenario where the lightest and the second-lightest neutralino are nearly degenerate in mass and enough CP-asymmetry can be produced through resonant leptogenesis. In this model, the lighter chargino and the lightest neutralino are highly degenerate. We have relatively lighter gauginos which can be produced at the LHC leading to heavily ionizing charged tracks. At the same time this model can also generate the correct neutrino mass scale. Thus our scenario is phenomenologically rich and testable at colliders.
description: 17 pages, 7 figures, Numerical results are improved and new plots are added, Journal version. arXiv admin note: text overlap with arXiv:hep-ph/0006173 by other authors
Assessing the Condition of the Transportation System and Infrastructure for a State Department of Transportation
Creators: name: Cunningham, Lawrence F.
name: Young, Clifford E.
name: Gerlach, James H.
name: Cunningham, Lawrence F.
name: Young, Clifford E.
name: Gerlach, James H.
Publisher: name: Unknown
Year: 1997
Subjects: Public Economics

description: Presented at the 39th Transportation Research Forum meeting, Oct. 16-18, 1997, Montreal, Quebec, Canada
ADOPTING DIGITAL TOOLS FOR LIFECYCLE ASSET INTEGRITY MANAGEMENT
Creators: name: Jones, David
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 401404
subject: Industrial engineering
classificationCode: 400403
subject: Chemical engineering design
classificationCode: 401501
subject: Marine engineering
classificationCode: 401704
subject: Mechanical engineering asset management
classificationCode: 401907
subject: Petroleum and reservoir engineering
classificationCode: 339999
subject: Other built environment and design not elsewhere classified
classificationCode: 330299
subject: Building not elsewhere classified
classificationCode: 330110
subject: Sustainable architecture
classificationCode: 330301
subject: Data visualisation and computational (incl. parametric and generative) design
classificationCode: 460299
subject: Artificial intelligence not elsewhere classified
classificationCode: 460505
subject: Database systems
classificationCode: 460501
subject: Data engineering and data science

description: Background Information – The oil and gas industry consists of a $3.4 trillion asset base (Deloitte, 2017). Whilst many assets are ageing and the average workforce age is >40 years old (OGUK, 2021), there is still a demand for hydrocarbons with increased requirements for productivity, CO2 emission reductions and cost savings (Aramco, 2022).Due to the age of some assets, the use of “4th Industrial Revolution” type digital tools in use may be partial and not integrated, or non-existent due to a mixture of fluctuating budgets (due to oil prices) and skill sets of personnel in these organisations.Rationale for Project Work – An effective asset management system:· Facilitates an organisations achievement of its purpose, mission and strategic goals;· Ensures the organisation manage their assets based on risk, cost and performance trade-offs in an organised way;· Demonstrates to internal and external stakeholders; the organisations intention and capability to manage assets properly.As an example of one technology, artificial intelligence machine learning has been utilised to trend and detect failures in multiple sets of equipment before they occur to allow for corrective interventions (Aramco, 2022). Organisations can therefore derive greater value from their assets by utilising digital tools to best manage the asset on a lifecycle risk, cost and performance approach.Aim and Objectives –The aim of the Project is to:· Identify three digital tools/solutions which offer the greatest benefit and ease of implementation for the oil and gas industry.Objectives:1. Identify the main digital tools / products/ solutions which are currently in use in the marketplace. Approx. 6-10 systems.2. Examine the benefits and drawbacks of each system from an asset management perspective.3. Collect feedback of these digital tools from Suppliers and Users.4. Recommend the three best suited systems.
Harmonic oscillator under Levy noise: Unexpected properties in the phase space
Creators: name: Sokolov, Igor M.
name: Dybiec, Bartlomiej
name: Ebelling, Werner
Publisher: name: arXiv
Year: 2010
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: A harmonic oscillator under influence of the noise is a basic model of various physical phenomena. Under Gaussian white noise the position and velocity of the oscillator are independent random variables which are distributed according to the bivariate Gaussian distribution with elliptic level lines. The distribution of phase is homogeneous. None of these properties hold in the general Lévy case. Thus, the level lines of the joint probability density are not elliptic. The coordinate and the velocity of the oscillator are strongly dependent, and this dependence is quantified by introducing the corresponding parameter ("width deficit"). The distribution of the phase is inhomogeneous and highly nontrivial.
description: 7 pages, 4 figures
title: On the variability of the semidiurnal solar and lunar tides of the equatorial electrojet during sudden stratospheric warmings
Creators: name: Siddiqui, Tarique A.
name: Maute, Astrid
name: Pedatella, Nick
name: Yamazaki, Yosuke
name: Lühr, Hermann
name: Stolle, Claudia
Publisher: name: Universität Potsdam
Year: 2021
Subjects: subject: 550 Geowissenschaften

description: The variabilities of the semidiurnal solar and lunar tides of the equatorial electrojet (EEJ) are investigated during the 2003, 2006, 2009 and 2013 major sudden stratospheric warming (SSW) events in this study. For this purpose, ground-magnetometer recordings at the equatorial observatories in Huancayo and Fúquene are utilized. Results show a major enhancement in the amplitude of the EEJ semidiurnal lunar tide in each of the four warming events. The EEJ semidiurnal solar tidal amplitude shows an amplification prior to the onset of warmings, a reduction during the deceleration of the zonal mean zonal wind at 60∘ N and 10 hPa, and a second enhancement a few days after the peak reversal of the zonal mean zonal wind during all four SSWs. Results also reveal that the amplitude of the EEJ semidiurnal lunar tide becomes comparable or even greater than the amplitude of the EEJ semidiurnal solar tide during all these warming events. The present study also compares the EEJ semidiurnal solar and lunar tidal changes with the variability of the migrating semidiurnal solar (SW2) and lunar (M2) tides in neutral temperature and zonal wind obtained from numerical simulations at E-region heights. A better agreement between the enhancements of the EEJ semidiurnal lunar tide and the M2 tide is found in comparison with the enhancements of the EEJ semidiurnal solar tide and the SW2 tide in both the neutral temperature and zonal wind at the E-region altitudes.
description: Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe; 1075
Coulomb Screening of 2D Massive Dirac Fermions
Creators: name: Zhang, Jia-Ning
Publisher: name: arXiv
Year: 2010
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: A model of 2D massive Dirac fermions, interacting with a instantaneous $1/r$ Coulomb interaction, is presented to mimic the physics of gapped graphene. The static polarization function is calculated explicitly to analyze screening effect at the finite temperature and density. Results are compared with the massless case . We also show that various other works can be reproduced within our model in a straightforward and unified manner.
Global, Local, and Iterative Searches to the Equilibrium Network Traffic Signal Setting Problem
Creators: name: Lee, Chungwon
name: Machemehl, Randy B.
name: Lee, Chungwon
name: Machemehl, Randy B.
Publisher: name: Unknown
Year: 1997
Subjects: Public Economics

description: Presented at the 39th Transportation Research Forum meeting, Oct. 16-18, 1997, Montreal, Quebec, Canada
$AdS_5\times S^5$ mirror TBA equations from Y-system and discontinuity relations
Creators: name: Balog, Janos
name: Hegedus, Arpad
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Using the recently proposed set of discontinuity relations we translate the AdS/CFT Y-system to TBA integral equations and quantization conditions for a large subset of excited states from the sl(2) sector of the $AdS_5 \times S^5$ string sigma-model. Our derivation provides an analytic proof of the fact that the exact Bethe equations reduce to the Beisert-Staudacher equations in the asymptotic limit. We also construct the corresponding T-system and show that in the language of T-functions the energy formula reduces to a single term which depends on a single T-function.
description: 67 pages, 4 figures; appendices added (published version)
title: "On the top of high towers..." discussing locations in a mobile health game for diabetics
Creators: name: Knöll, Martin
Publisher: name: iadis- International Association for Development of the Information Society
Year: 2023

description: The potential impact of "games for health" on education and motivation within healthcare has been widely discussed and is the focus of many current research projects. Games, running on mobile devices, with attached biosensors and Internet access, promise to unfold an increased influence on individual health related behavior. In particular, for the prevention and management of so called "lifestyle diseases" such as obesity or diabetes, game designers explore a wide range of Ubiquitous Technologies. As mobile health games are played within user´s everyday life, they find their way into our cities: parks, schools, offices or shopping centers are their potential playgrounds. This article discusses three concepts for a mobile game for children with diabetes. The focus lies in particular on their involvement of different locations and participants within the game play. Early conceptual prototypes have been "playtested" by a group of patients and their doctors from the Diabetes centre at the Olgahospital in Stuttgart, Germany. The participants´ comments, presented in this article, point to several design challenges of mobile health games: Various locations, it is argued here, do not only implicate technological challenges, but also reveal social issues regarding interactive design.
Using Visual Environments and Individual Assignments for Improving Algorithmic Thinking in Introductory Programming Courses
Creators: name: Aharon, Yadin
Publisher: name: Editura Universitara
Year: 2012
Subjects: subject: 0 Social sciences
subject: 37 Education
subject: 371 Instructional design
subject: 004:37 Elearning

description: Due to the elevated programming courses failing rate in our department (45%) an action research was initiated. As part of this action research, that was performed during four semesters several course structures and learning tactics were examined. The evaluation methodology was simple and based only on the percentage of failing students.
Marijuana use among juvenile justice–Involved youth: A closer look at intentions and risky behaviors
Creators: name: Callahan, Tiffany J.
name: Hooper, Ann E. Caldwell
name: Bryan, Angela D.
Publisher: name: F1000 Research Limited
Year: 2019

description: Given the high rate of marijuana use among juvenile justice-involved youth and the potential influence of marijuana use on risky sexual behavior, the current study aimed to examine the influence of marijuana use on a TPB based model. Results indicated  that the theoretical model of condom use intentions was equally valid regardless of marijuana use status, and thus interventions to reduce sexual risk behavior among both marijuana using and non-marijuana using juvenile justice-involved youth can be appropriately based on the model.
A Solution Method for the Traveling Salesman n person M town Problem (TSP (n/M)) using the Genetic Algorithm)
Creators: name: Karasawa, Yutaka
name: Matsuda, Yasumasa
name: Aiura, Nobunori
name: Kamatsu, Takatomo
name: Karasawa, Yutaka
name: Matsuda, Yasumasa
name: Aiura, Nobunori
name: Kamatsu, Takatomo
Publisher: name: Unknown
Year: 1997
Subjects: Public Economics

description: Presented at the 39th Transportation Research Forum meeting, Oct. 16-18, 1997, Montreal, Quebec, Canada
Agrarstrukturgesetzentwurf Sachsen-Anhalt: Faktencheck und Einordnung
Creators: name: Balmann, Alfons
name: Balmann, Alfons
Publisher: name: Unknown
Year: 2020
Subjects: subject: Land Economics/Use
subject: FORLand Policy Brief 03 (2020)

description: Mit dem im November 2020 im Landtag eingebrachten Entwurf zum Agrarstrukturgesetz Sachsen-Anhalt sollen der landwirtschaftliche Bodenmarkt sowie der Erwerb von Beteiligungen an landwirtschaftlichen Unternehmen stärker reguliert werden. Begründet werden diese Vorhaben mit Argumenten und einem Leitbild, die sich in vielfacher Weise widersprechen und einem Faktencheck nicht standhalten. Wesentliche Merkmale und die Genese der Agrarstruktur Sachsen-Anhalts, wie Unternehmertum, genossenschaftliche Prinzipien, Zuwanderung von Landwirtinnen und Landwirten aus Westdeutschland und den Niederlanden, die dominierende Lohnarbeitsverfassung, Größenvorteile sowie auch die damit verbundene Wettbewerbsfähigkeit und Beiträge zu Wertschöpfung und Beschäftigung im ländlichen Raum werden ignoriert, unrichtig dargestellt und diskreditiert. Stattdessen werden bäuerliche bzw. kleinere und mittlere Haupt- und Nebenerwerbsbetriebe zum Leitbild auserkoren, obwohl diese aufgrund geringer Produktivität und Wettbewerbsfähigkeit auch 30 Jahre nach der Wiedervereinigung nur ein Nischendasein führen und wenig zu Wertschöpfung und Beschäftigung beitragen. Auf diese Weise werden die tatsächlichen agrarstrukturellen Stärken und Herausforderungen der Landwirtschaft in Sachsen-Anhalt ebenso verkannt, wie die Bedeutung der Mechanismen und Funktionen des Bodenmarktes. Dementsprechend widersprechen die vorgesehenen Regelungen des Gesetzentwurfs ihrer vorgeblichen Zielsetzung und gefährden den künftigen Beitrag der Landwirtschaft zu Wertschöpfung und Beschäftigung im ländlichen Raum.
Stability of inhomogeneous states in mean-field models with a local potential
Creators: name: Bachelard, Romain
name: Staniscia, F.
name: Dauxois, Thierry
name: De Ninno, G.
name: Ruffo, S.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The Vlasov equation is well known to provide a good description of the dynamics of mean-field systems in the $N \to \infty$ limit. This equation has an infinity of stationary states and the case of {\it homogeneous} states, for which the single-particle distribution function is independent of the spatial variable, is well characterized analytically. On the other hand, the inhomogeneous case often requires some approximations for an analytical treatment: the dynamics is then best treated in action-angle variables, and the potential generating inhomogeneity is generally very complex in these new variables. We here treat analytically the linear stability of toy-models where the inhomogeneity is created by an external field. Transforming the Vlasov equation into action-angle variables, we derive a dispersion relation that we accomplish to solve for both the growth rate of the instability and the stability threshold for two specific models: the Hamiltonian Mean-Field model with additional asymmetry and the mean-field $ϕ^4$ model. The results are compared with numerical simulations of the $N$-body dynamics. When the {\it inhomogeneous} state is stationary, we expect to observe in the $N$-body dynamics Quasi-Stationary-States (QSS), whose lifetime diverge algebraically with $N$.
title: Evaluation of pollution of soils and particulate matter around metal recycling factories in Southwestern Nigeria
Creators: name: Olatunji, Akinade S.
name: Kolawole, Tesleem O.
name: Oloruntola, Moroof
name: Günter, Christina
Publisher: name: Universität Potsdam
Year: 2021
Subjects: subject: 610 Medizin und Gesundheit

description: Background. Metal recycling factories (MRFs) have developed rapidly in Nigeria as recycling policies have been increasingly embraced. These MRFs are point sources for introducing potentially toxic elements (PTEs) into environmental media. Objectives. The aim of this study was to determine the constituents (elemental and mineralogy) of the wastes (slag and particulate matter, (PM)) and soils around the MRFs and to determine the level of pollution within the area. Methods. Sixty samples (30 slag samples, 15 soil samples and 15 PM samples) were collected for this study. The soils, slag and PM samples were analyzed for elemental constituents using inductively coupled plasma optical emission spectrometry. Mineralogy of the PM was determined using scanning electron microscope-energy dispersive spectroscopy (SEM-EDS), and soil mineralogy was determined by an X-ray diffractometer (XRD). Results. The results of the soil analyses revealed the following concentrations for the selected metals in mg/kg include lead (Pb) (21.0-2399.0), zinc (Zn) (56.0-4188.0), copper (Cu) (10.0-1470.0), nickel (Ni) (6.0-215.0), chromium (Cr) (921.0-1737.0) and cadmium (Cd) (below detectable limit (Bdl)-18.1). For the slags the results were Pb (68.0-.333.0), Zn (1364.0-3062), Cu (119.0-1470.0), Ni (12.0-675.0), Cr (297-1737) and Cd (Bdl-15.8). The results in µg/g for the metal analysis in PM were Pb (4.6-160.0), Zn (18.0-471.0), Cu (2.5-11.0), Ni (0.8-4.2), and Cr (2.5-11.0), while Cd was undetected. The slags are currently utilized for filling the foundations of buildings and roads, providing additional pathways for the introduction of PTEs into the environment from the suspended materials generated from mechanical breakdown of the slags. Conclusions. The MRFs were found to have impacted the quality of environmental media through the introduction of PTEs, impairing soil quality, in addition to PM, which can have detrimental health consequences. Further studies on the health implications of these pollutants and their impacts on human health are needed. Competing Interests. The authors declare no competing financial interests
description: Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe; 1074
Effects of Axle Loads and Train Capacity on Heavy Haul Network Operations
Creators: name: Robert, William E.
name: Chapman, Jeffrey D.
name: Martland, Carl D.
name: Robert, William E.
name: Chapman, Jeffrey D.
name: Martland, Carl D.
Publisher: name: Unknown
Year: 1997
Subjects: Public Economics

description: Presented at the 39th Transportation Research Forum meeting, Oct. 16-18, 1997, Montreal, Quebec, Canada
Growth factor in f(T) gravity
Creators: name: Zheng, Rui
name: Huang, Qing-Guo
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We derive the evolution equation of growth factor for the matter over-dense perturbation in $f(T)$ gravity. For instance, we investigate its behavior in power law model at small redshift and compare it to the prediction of $Λ$CDM and dark energy with the same equation of state in the framework of Einstein general relativity. We find that the perturbation in $f(T)$ gravity grows slower than that in Einstein general relativity if $\p f/\p T>0$ due to the effectively weakened gravity.
description: 15 pages,1 figure; v2,typos corrected; v3, discussions added, accepted by JCAP
title: User experience (UX) in business, management, and psychology
title: a bibliometric mapping of the current state of research
titleType: Subtitle
Creators: name: Luther, Laura
name: Tiberius, Victor
name: Brem, Alexander
Publisher: name: Universität Potsdam
Year: 2021
Subjects: subject: 004 Datenverarbeitung; Informatik

description: User Experience (UX) describes the holistic experience of a user before, during, and after interaction with a platform, product, or service. UX adds value and attraction to their sole functionality and is therefore highly relevant for firms. The increased interest in UX has produced a vast amount of scholarly research since 1983. The research field is, therefore, complex and scattered. Conducting a bibliometric analysis, we aim at structuring the field quantitatively and rather abstractly. We employed citation analyses, co-citation analyses, and content analyses to evaluate productivity and impact of extant research. We suggest that future research should focus more on business and management related topics.
description: Postprints der Universität Potsdam : Wirtschafts- und Sozialwissenschaftliche Reihe; 136
Relativistic acceleration of Landau resonant particles as a consequence of Hopf bifurcations
Creators: name: Osmane, A.
name: Hamza, A. M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: Using bifurcation theory on a dynamical system simulating the interaction of a particle with an obliquely propagating wave in relativistic regimes, we demonstrate that uniform acceleration arises as a consequence of Hopf bifurcations of Landau resonant particles. The acceleration process arises as a form of surfatron established through the locking in pitch angle, gyrophase, and physical trapping along the wave-vector direction. Integrating the dynamical system for large amplitudes ($δB/B_0\sim0.1$) obliquely propagating waves, we find that electrons with initial energies in the keV range can be accelerated to MeV energies on timescales of the order of milliseconds. The Hopf condition of Landau resonant particles could underlie some of the most efficient energization of particles in space and astrophysical plasmas.
description: 5 pages, 6 figures. The manuscript as been accepted for publication in Physics of Plasmas
title: Femtosecond-pulsed laser written and etched fiber bragg gratings for fiber-optical biosensing
Creators: name: Schulze, Sven
name: Wehrhold, Michel
name: Hille, Carsten
Publisher: name: Universität Potsdam
Year: 2021
Subjects: subject: 620 Ingenieurwissenschaften und zugeordnete Tätigkeiten

description: We present the development of a label-free, highly sensitive fiber-optical biosensor for online detection and quantification of biomolecules. Here, the advantages of etched fiber Bragg gratings (eFBG) were used, since they induce a narrowband Bragg wavelength peak in the reflection operation mode. The gratings were fabricated point-by-point via a nonlinear absorption process of a highly focused femtosecond-pulsed laser, without the need of prior coating removal or specific fiber doping. The sensitivity of the Bragg wavelength peak to the surrounding refractive index (SRI), as needed for biochemical sensing, was realized by fiber cladding removal using hydrofluoric acid etching. For evaluation of biosensing capabilities, eFBG fibers were biofunctionalized with a single-stranded DNA aptamer specific for binding the C-reactive protein (CRP). Thus, the CRP-sensitive eFBG fiber-optical biosensor showed a very low limit of detection of 0.82 pg/L, with a dynamic range of CRP detection from approximately 0.8 pg/L to 1.2 µg/L. The biosensor showed a high specificity to CRP even in the presence of interfering substances. These results suggest that the proposed biosensor is capable for quantification of CRP from trace amounts of clinical samples. In addition, the adaption of this eFBG fiber-optical biosensor for detection of other relevant analytes can be easily realized.
description: Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe; 1073
Erfolgreicher dank Qualifikation und Mentoring? Analysen von Determinanten des beruflichen Erfolgs von Schulleitungen in Deutschland
Creators: name: Tulowitzki, Pierre
name: Pietsch, Marcus
name: Grigoleit, Ella
name: Köferli, Sara
Publisher: name: Springer
Year: 2023
Subjects: subject: Gehalt
subject: Karrierre
subject: Schulführung
subject: Lohnlücke
subject: Qualifikation
subject: 370 - Erziehung, Schul- und Bildungswesen

description: Vor dem Hintergrund eines zunehmenden Mangels an Schulleitungen in Deutschland erscheint es von zentraler Bedeutung, dass Schulleitungen sich als erfolgreich in ihrem Amt wahrnehmen (subjektiver Berufserfolg) und auch anhand von Faktoren wie Gehalt als erfolgreich erachtet werden können (objektiver Berufserfolg), da sich diese Faktoren auf das Belastungserleben sowie die Motivation auswirken können. Ziel der Studie war es, für Deutschland zu ermitteln, welche Determinanten aus den Bereichen Soziodemographie, (objektiviertes) Humankapital und (organisationale) Förderungsmaßnahmen den Berufserfolg von Schulleitungen beeinflussen. Die Studie nutzt Daten der Studie Leadership in German Schools 2020 (Cramer et al. 2020), die durch die forsa Politik- und Sozialforschung GmbH zwischen September und November 2019 erhoben wurden. Die Grundgesamtheit für die Befragung umfasste alle Schulleitungen an allgemeinbildenden Schulen in Deutschland. In dieser Gruppe wurde eine zufällig ausgewählte und für Deutschland repräsentative Stichprobe von insgesamt 405 Schulleitungen mithilfe eines standardisierten und pilotierten Onlinefragebogens befragt. Die Ergebnisse deuten darauf hin, dass zwischen dem wahrgenommenen Erfolg und universitären Qualifikationen und Qualifikationen an einem Landesinstitut ein tendenzieller Zusammenhang besteht. Zwischen Einkommen und Qualifikationsmaßnahmen und Mentoring konnte hingegen kein statistisch signifikanter Zusammenhang gefunden werden. Weibliche Schulleitungen haben, auch nach Kontrolle einer Vielzahl von Kovariaten, ein geringeres Einkommen als männliche.
title: Supporting agricultural ecosystem services through the integration of perennial polycultures into crop rotations
Creators: name: Weißhuhn, Peter
name: Reckling, Moritz
name: Stachow, Ulrich
name: Wiggering, Hubert
Publisher: name: Universität Potsdam
Year: 2021
Subjects: subject: 690 Hausbau, Bauhandwerk

description: This review analyzes the potential role and long-term effects of field perennial polycultures (mixtures) in agricultural systems, with the aim of reducing the trade-offs between provisioning and regulating ecosystem services. First, crop rotations are identified as a suitable tool for the assessment of the long-term effects of perennial polycultures on ecosystem services, which are not visible at the single-crop level. Second, the ability of perennial polycultures to support ecosystem services when used in crop rotations is quantified through eight agricultural ecosystem services. Legume-grass mixtures and wildflower mixtures are used as examples of perennial polycultures, and compared with silage maize as a typical crop for biomass production. Perennial polycultures enhance soil fertility, soil protection, climate regulation, pollination, pest and weed control, and landscape aesthetics compared with maize. They also score lower for biomass production compared with maize, which confirms the trade-off between provisioning and regulating ecosystem services. However, the additional positive factors provided by perennial polycultures, such as reduced costs for mineral fertilizer, pesticides, and soil tillage, and a significant preceding crop effect that increases the yields of subsequent crops, should be taken into account. However, a full assessment of agricultural ecosystem services requires a more holistic analysis that is beyond the capabilities of current frameworks.
description: Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe; 1069
Transition between ordinary and topological insulator regimes in two-dimensional resonant magnetotransport
Creators: name: Tkachov, G.
name: Hankiewicz, E. M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In the two-dimensional case the transition between ordinary and topological insulator states can be described by a massive Dirac model with the mass term changing its sign at the transition point. We theoretically investigate how such a transition manifests itself in resonant transport via localized helical edge states. The resonance occurs in the middle of the band gap due to a zero edge-state mode which is protected by the time-reversal symmetry, also when coupled to the conducting leads. We obtain the explicit dependence of the resonant conductance on the mass parameter and an external magnetic field. The proposal may be of practical use, allowing one to determine the orbital g-factor of helical edge states in two-dimensional topological insulators.
description: 7 pages, 3 eps figures, Phys. Rev. B (in press)
PolicyCLOUD_D1.1_Project Management Plan
Creators: name: García, María Teresa
name: Mavrogiorgou, Argyro
Publisher: name: Zenodo
Year: 2020
Subjects: Policy Cloud
EOSC
DataManagement

description: The main goal of the document is to act as a compilation of all the management procedures in the scope of the PolicyCLOUD project to be provided to all participants. It presents and describes the procedures and guidelines to efficiently and successfully manage the project. The deliverable provides an overview of the scope, partners, project resources as well as its planning along the full lifecycle of the project. To ensure a proper progress control of the project, reporting and monitoring procedures are described. The project governance structure and its bodies, as well as the communication management plan are also detailed. Finally by the definition of the Quality and Risk Management plans, tools are provided to ensure the requested quality level of the project results and to monitor and control risks.
The Use of New Information Technologies in the Motor Carrier Industry
Creators: name: Bigras, Yvon
name: Crainic, Teodor Gabriel
name: Roy, Jacques
name: Bigras, Yvon
name: Crainic, Teodor Gabriel
name: Roy, Jacques
Publisher: name: Unknown
Year: 1997
Subjects: Public Economics

description: Presented at the 39th Transportation Research Forum meeting, Oct. 16-18, 1997, Montreal, Quebec, Canada
Thermally activated delayed fluorescence materials as organic photosensitizers in small molecules and polymers
Creators: name: Polgar, Alexander M.
Publisher: name: University of British Columbia
Year: 2022

description: Photosensitizer molecules play a crucial role in materials and life sciences. Efforts to improve their performance and reduce the associated costs are vital for advancing environmentally friendly light-driven technologies. This thesis examines photosensitizers that make use of thermally activated delayed fluorescence (TADF) and explores efforts to develop emitters with application-tailored properties. The key finding is the diversity of accessible excited state pathways in TADF sensitizers, which can be tuned by both molecular and supramolecular approaches to suit a problem. Organic light emitting diodes (OLEDs) are the future of solid-state lighting, but the full realization of this technology will require new materials that can be manufactured cost-effectively with high performance for the conversion of electricity to light. Polymeric TADF emitters are attractive in this respect because they can function as the emissive elements of OLEDs and be deposited by low-cost solution methods. This thesis makes use of 2,4,6-triphenylpyrimidine-based acrylic monomers which exhibit bright, colour-tunable TADF, potentially suitable for use in solution-processed OLEDs when copolymerized with a host monomer. These same monomers can also function as sensitizers of fluorescent emission in terpolymers containing a fluorescent monomer as an energy acceptor for bright and colour-pure TADF-sensitized fluorescence (TAF). The efficiency with which energy is transferred in TAF is found to depend on polymer architecture, with block copolymers limiting emission quenching interactions and rigid bottlebrush copolymers providing optimal control over the interface between energy donor and acceptor at the nanoscale. TADF sensitizers are also attractive in photocatalysis because of the diversity of their accessible excited states. A series of TADF donor-acceptor conjugates based on 2,4,6- triphenylpyrimidine acceptor and 9,10-dihydro-9,9-dimethylacridine (DMA) donors were prepared as photosensitizers for organocatalyzed organic atom transfer radical polymerization (OATRP). The donor is either unmodified DMA or functionalized with methylphenyl or methoxyphenyl groups. The donor-modification strategy is found to dramatically improve OATRP performance by imparting redox reversibility and high rates of dissociative electron transfer, as well as preventing unwanted side-reactivity in the excited state. With the methoxyphenyl derivative, methacrylic monomers could be polymerized with low dispersity (≤1.3), high initiator efficiency and chain-end fidelity, and molecular weights up to 40 kDa.
The Applicability of Transportation Information Management Systems for State Departments of Transportation
Creators: name: Gerlac, James
name: Cunningham, Lawrence F.
name: Young, Clifford
name: Gerlac, James
name: Cunningham, Lawrence F.
name: Young, Clifford
Publisher: name: Unknown
Year: 1997
Subjects: Public Economics

description: Presented at the 39th Transportation Research Forum meeting, Oct. 16-18, 1997, Montreal, Quebec, Canada
Safe and risk-aware trajectory planning under Gaussian Mixture Model environmental uncertainty
Creators: name: Ren, Kai
Publisher: name: University of British Columbia
Year: 2022

description: In this work, we present a framework for trajectory planning of autonomous vehicles in the presence of multimodal environmental uncertainty. The trajectory planning framework is designed based on chance-constrained and Conditional Value-at-risk (CVaR)-constrained programming methods. We employ a Gaussian Mixture Model (GMM) to model the multimodal behaviors of the uncertain future states of the dynamic obstacles. We first summarize tractable chance-constrained and CVaR-constrained optimization techniques under GMM uncertain parameters. We consider the case in which the GMM moments are known and the data-driven scenario when only samples are provided. We then formulate both the chance-constrained and CVaR-constrained finite horizon trajectory planning (TP) problem, with a time-varying deterministic linear dynamic system and polyhedral obstacles showing GMM uncertainty. We present tractable reformulations of both chance-constrained and CVaR-constrained TP problems in cases of known GMM moments and when only samples of the uncertainty are available. When the GMM moments are estimated via finite samples, we present a tight concentration bound to ensure the satisfaction of the chance constraint with a probabilistic guarantee. Finally, we present a closed-loop Model Predictive Control algorithm under GMM uncertainty, which employs periodically updated observations and predictions of the uncertain obstacles, and solves the TP problems in a receding horizon fashion. We verify our methods by conducting numerical simulations, integrating with state-of-the-art trajectory prediction algorithms, and testing on real-world autonomous driving datasets.
Conceptual Framework for a Technology Map of the Freight Transportation Industry
Creators: name: Prentice, Barry E.
name: Derkson, Wade W.
name: Prentice, Barry E.
name: Derkson, Wade W.
Publisher: name: Unknown
Year: 1997
Subjects: Public Economics

description: Presented at the 39th Transportation Research Forum meeting, Oct. 16-18, 1997, Montreal, Quebec, Canada
Looking forward, looking back: Reflections on the past and planning for the future
Creators: name: Alcohol Research Documentation, Inc.
Publisher: name: No Publisher Supplied
Year: 2014

description: Full conference booklet of the 36th Annual Conference of SALIS (Substance Abuse Librarians & Information Specialists) hosted by the Center of Alcohol Studies Library, April 29 - May 2, 2014 in New Brunswick, NJ.
D7.2 MARKET ANALYSIS & BUSINESS POTENTIALS
Creators: name: Garrido, Esther
name: Ricard Munnè,
name: Montero, Jorge
name: Milà, Miquel
name: Mahíllo, Juan
name: Mahíllo, Juan
name: Mavrogiorgou, Argyro
name: Kiourtis, Athanasios
name: Karayannis, Fotis
name: Maglogiannis, Ilias
name: Manias, George
name: Willems, Marieke
name: Cauhe, Elisa
name: Nikolova, Petya
name: Yovkova, Iskra
name: Georgieva, Ana
name: Soultanova, Nadia
name: Ledakis, Giannis
name: Michael, Panayiotis
name: Hoyo, Rafael Del
name: Meerkamp, Marc
Publisher: name: Zenodo
Year: 2020
Subjects: Policy Cloud
EOSC
DataManagement

description: Governments around the world face policy issues that require strategies and solutions using new technologies, access to data, new analytical tools and techniques and social crowdsourcing analysis for the successful implementation and acceptance of public policies and their later assessment. Data is a fundamental resource for carrying out all government activities and governments everywhere, and at all levels, are looking into the opportunities of data-driven innovation. In this context, the PolicyCLOUD environment will introduce a holistic methodology for policy modelling and management based on data, providing a toolkit that allows both stakeholders and engaged citizens to create policies by exploiting the PolicyCLOUD models and analytical tools on various datasets, contexts and policy models. The document D7.2: Market Analysis and Business Potentials is the first deliverable of the PolicyCLOUD business- related activities, setting the market context where the project’s results will be exploited and giving an initial insight about these results. Following the proven Atos’ “Innovation Hub Methodology”, that divides the project time period in two different phases (analysis and strategy), the Consortium has conducted several activities, notable amongst those is the Value Proposition Canvas Workshop. This was an interactive session during First General Assembly, held remotely on the 7th May 2020, focusing on the PolicyCLOUD core offering and stakeholders that could obtain the greatest value of the solution. Initial versions of deliverables D2.1: State of the art and requirement analysis and D2.2: Conceptual Model and Reference Architecture have given input to this deliverable, especially in the analysis of the technological context and in the identification of the project’s outcomes and their main features. The results of this deliverable D7.2 will in turn come back to the technical Work Packages (WPs) and will influence the architecture design with the aim of solving real problems that users have. Ultimately, this is the goal of the business activities of the project, ensure that the finished technology is usable, engaging end users from the initial phases of the project and facilitating its further use. The feedback expected from the Impact Creation Board in relation to this deliverable will be key to design next activities and to support project’s innovation.
Spontaneous symmetry breaking: variations on a theme
Creators: name: Jona-Lasinio, Giovanni
Publisher: name: arXiv
Year: 2010
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Spontaneous symmetry breaking (SSB) is a widespread phenomenon in several areas of physics. In this paper I wish to illustrate some situations where spontaneous symmetry breaking presents non obvious aspects. The first example is taken from molecular physics and is related to the paradox of existence of chiral molecules. The second case refers to a Dirac field in presence of a magnetic field. Gusynin, Miransky and Shovkovy have shown that Nambu-Jona-Lasinio (NJL) models, where SSB of chiral symmetry takes place for the nonlinear coupling over a certain threshold, in presence of a magnetic field exhibit SSB for any value of the coupling. They called this phenomenon magnetic catalysis. I will discuss this problem in 2 + 1 dimensions from an operatorial point of view and show that the basic phenomenon is a double pairing induced by the magnetic field in the vacuum for any value of the mass. This pairing provides the environment responsible for chiral symmetry breaking in NJL models with very weak nonlinearities. The third case illustrates briefly SSB in stationary nonequilibrium states and its possible relevance in natural phenomena.
description: 16 pages. This paper is based on a talk given at the Yukawa Institute in Kyoto in the Fall 2009 at a meeting in honor of Yoichiro Nambu. Published in Progress of Theoretical Physics, {\bf 124}, (2010), 731
On and Off-diagonal Sturmian operator: dynamic and spectral dimension
Creators: name: Marin, Laurent
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 81Q10, 47B36

description: We study two versions of quasicrystal model, both subcases of Jacobi matrices. For Off-diagonal model, we show an upper bound of dynamical exponent and the norm of the transfer matrix. We apply this result to the Off-diagonal Fibonacci Hamiltonian and obtain a sub-ballistic bound for coupling large enough. In diagonal case, we improve previous lower bounds on the fractal box-counting dimension of the spectrum.
description: arXiv admin note: text overlap with arXiv:math-ph/0502044 and arXiv:0807.3024 by other authors
Three dimensional generalization of the $J_1$-$J_2$ Heisenberg model on a square lattice and role of the interlayer coupling $J_c$
Creators: name: Holt, Michael
name: Sushkov, Oleg P.
name: Stanek, Daniel
name: Uhrig, Götz S.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: A possibility to describe magnetism in the iron pnictide parent compounds in terms of the two-dimensional frustrated Heisenberg $J_1$-$J_2$ model has been actively discussed recently. However, recent neutron scattering data has shown that the pnictides have a relatively large spin wave dispersion in the direction perpendicular to the planes. This indicates that the third dimension is very important. Motivated by this observation we study the $J_1$-$J_2$-$J_c$ model that is the three dimensional generalization of the $J_1$-$J_2$ Heisenberg model for $S = 1/2$ and S = 1. Using self-consistent spin wave theory we present a detailed description of the staggered magnetization and magnetic excitations in the collinear state. We find that the introduction of the interlayer coupling $J_c$ suppresses the quantum fluctuations and strengthens the long range ordering. In the $J_1$-$J_2$-$J_c$ model, we find two qualitatively distinct scenarios for how the collinear phase becomes unstable upon increasing $J_1$. Either the magnetization or one of the spin wave velocities vanishes. For $S = 1/2$ renormalization due to quantum fluctuations is significantly stronger than for S=1, in particular close to the quantum phase transition. Our findings for the $J_1$-$J_2$-$J_c$ model are of general theoretical interest, however, the results show that it is unlikely that the model is relevant to undoped pnictides.
description: 11 pages, 10 figures. Updated version, several references added
A natural Finsler--Laplace operator
Creators: name: Barthelmé, Thomas
Publisher: name: arXiv
Year: 2011
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 58J60, 53C60

description: We give a new definition of a Laplace operator for Finsler metric as an average with regard to an angle measure of the second directional derivatives. This definition uses a dynamical approach due to Foulon that does not require the use of connections nor local coordinates. We show using 1-parameter families of Katok--Ziller metrics that this Finsler--Laplace operator admits explicit representations and computations of spectral data.
description: 25 pages, v2: minor modifications, changed the introduction
Probing an Ultracold-Atom Crystal with Matter Waves
Creators: name: Gadway, Bryce
name: Pertot, Daniel
name: Reeves, Jeremy
name: Schneble, Dominik
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: Atomic quantum gases in optical lattices serve as a versatile testbed for important concepts of modern condensed-matter physics. The availability of methods to characterize strongly correlated phases is crucial for the study of these systems. Diffraction techniques to reveal long-range spatial structure, which may complement \emph{in situ} detection methods, have been largely unexplored. Here we experimentally demonstrate that Bragg diffraction of neutral atoms can be used for this purpose. Using a one-dimensional Bose gas as a source of matter waves, we are able to infer the spatial ordering and on-site localization of atoms confined to an optical lattice. We also study the suppression of inelastic scattering between incident matter waves and the lattice-trapped atoms, occurring for increased lattice depth. Furthermore, we use atomic de Broglie waves to detect forced antiferromagnetic ordering in an atomic spin mixture, demonstrating the suitability of our method for the non-destructive detection of spin-ordered phases in strongly correlated atomic gases.
description: 13 pages, 3 figures ; substantially revised version with additional data