cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
On the flag curvature of invariant Randers metrics
Creators: name: Moghaddam, H. R. Salimi
Publisher: name: arXiv
Year: 2013
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: In the present paper, the flag curvature of invariant Randers metrics on homogeneous spaces and Lie groups is studied. We first give an explicit formula for the flag curvature of invariant Randers metrics arising from invariant Riemannian metrics on homogeneous spaces and, in special case, Lie groups. We then study Randers metrics of constant positive flag curvature and complete underlying Riemannian metric on Lie groups. Finally we give some properties of those Lie groups which admit a left invariant non-Riemannian Randers metric of Berwald type arising from a left invariant Riemannian metric and a left invariant vector field.
Efficient modelling of IC conducted emission for power integrity analysis
Creators: name: Kazemzadeh, Reza
name: Ludwig, Stefan
name: Radić-Weissenfeld, Ljubica J.
name: Mathis, Wolfgang
Publisher: name: Göttingen : Copernicus GmbH
Year: 2009
Subjects: subject: Complex model
subject: Conducted emissions
subject: Model order reduction
subject: Module-based
subject: Power integrity
subject: Reduced model
subject: Rough estimation
subject: Supply currents
subject: Electronics engineering
subject: Electrical engineering
subject: Dewey Decimal Classification::600 | Technik

description: In this paper two methodologies to reduce the complexity of IC conducted emission models for Power Integrity analysis in ICs are presented. The methodologies differ concerning the applicability in simulation tools, complexity and accuracy of the generated models. The first methodology uses a complex model and reduces its order to generate a model with a fewer number of elements. This methodology therefore involves a model order reduction approach. A second minimum complexity, module based modelling approach is introduced for rough estimations, as the order reduced model is still too complex for some applications. The two methodologies are applied to an IC conducted emission model of two digital modules of a 32 Bit microcontroller. The results of the three models are compared and discussed. Fields of application for the introduced modelling approaches are the estimation of the magnitude and time behaviour of the supply current as well as the determination of the number and position of the IC's supply pins.
Modellierungskonzept für MOS Varaktoren zur Minimierung der AM-FM Konversion in VCOs [Modeling concept for MOS varactors for the minimization of the AM-FM conversion in VCOs]
Creators: name: Peikert, T.
name: Bremer, J.-K.
name: Mathis, Wolfgang
Publisher: name: Göttingen : Copernicus GmbH
Year: 2010
Subjects: subject: Analytical simulations
subject: Design parameters
subject: Large signal capacitance
subject: Modeling concepts
subject: Operating regions
subject: Process parameters
subject: Simulation model
subject: Spectre simulations
subject: Amplitude modulation
subject: Capacitance
subject: CMOS integrated circuits
subject: Design
subject: Varactors
subject: Variable frequency oscillators
subject: Computer simulation
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau::621 | Angewandte Physik::621,3 | Elektrotechnik, Elektronik

description: In this work an analytical simulation model for MOS varactors, that can be used in a systematically VCO design flow, is presented. The simulation model is based on the EKV transistor model and includes only design and process parameters of the used CMOS technology. The proposed simulation model allows calculating the required design parameters and the effective large signal capacitance of the varactors incorporated into the VCO as a function of the output signal of the VCO. Based on the expression for the effective large signal capacitance it is possible to optimize the AMFM conversion behavior of the used varactors. The validity and accuracy of the simulation model is verified by Spectre simulations which are based on a 0.25 μm CMOS process (SGB25) from the company IHP and a 0.35 μm CMOS process (C35) from the company AMS. The simulation results show a good accordance in all transistor operating regions for NMOS varactors as well as PMOS varactors.
description: In dieser Arbeit wird ein analytisches Simulationsmodell für MOS Varaktoren zur Entwurfsunterstützung von integrierten CMOS LC-Tank VCO-Schaltungen präsentiert. Das analytische Simulationsmodell wurde auf Basis des EKV-Transistormodells implementiert und beinhaltet ausschließlich Design- und Prozessparameter für die Berechnung der Varaktorkapazität. Dieses Simulationsmodell ermöglicht es, die verwendeten Varaktoren im Vorfeld des VCO-Entwurfs zu dimensionieren, die effektive Großsignalkapazität in Abhängigkeit des Ausgangssignals zu berechnen und einzelne Eigenschaften der Varaktoren, wie z.B. das AM-FM Konversionsverhalten zu optimieren. Die Gültigkeit des vorgestellten analytischen Simulationsmodells zur Beschreibung der Varaktorkapazität in CMOS LC-Tank VCOs, wird anhand von Spectre (Cadence) Simulationen auf Basis eines 0.25 μm CMOS Prozesses der Firma IHP (SGB25) und eines 0.35 μm CMOS Prozesses der Firma AMS (C35) verifiziert.
Workshop on Traffic Infrastructure Mapping and Automated Damage Assessment Systems
Creators: name: Rüther, Matthias
Publisher: name: Zenodo
Year: 2021
Subjects: Railway Asset Management
Use Cases
Data Platform
Driving Functions

description: In recent years, the automated digital capture of traffic infrastructure has gained importance. Apart from large-scale map providers, also automotive manufacturers and traffic infrastructure providers rely on digital spatial information for different purposes. There are two main drivers for this field of research: the need for precise spatial digital twins to enable simulation and driving functions, especially for autonomous mobility the need for predictive maintenance and asset management of infrastructure.
Effiziente Verfahren zur Parallelisierung von EMV-Simulationen für den Entwurfsprozess integrierter Schaltungen [Efficient process in the parallelization of electromagnetic compatibility (EMC) simulations for the design process of the integrated circuit]
Creators: name: Barke, M.
name: Preisner, T.
name: Mathis, Wolfgang
Publisher: name: Göttingen : Copernicus GmbH
Year: 2009
Subjects: subject: Design process
subject: Efficient process
subject: Parallelizations
subject: Electrical engineering
subject: Electronics engineering
subject: Electromagnetic compatibility
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau::621 | Angewandte Physik::621,3 | Elektrotechnik, Elektronik

description: In dieser Arbeit wird mit einer parallelisierten Version des PCG-Verfahrens (preconditioned conjugate gradient method) eine effiziente Technik zur numerischen Lösung großer Gleichungssysteme vorgestellt. Der Anwendungsbereich ist dabei die Simulation numerischer Feldberechnungen (beispielsweise durch die Finite-Elemente-Methode). Es wird ferner auf eine Datenstruktur eingegangen, die für die spezielle Struktur der auftretenden Koeffizientenmatrizen geeignet ist.
title: Identification and Conceptualization of Sexual Abuse Resiliency Factors: A Review of the Literature
Creators: name: Moss, Heidi J.
Publisher: name: Utah State University
Year: 1994

description: Resiliency, while historically grounded and defined, lacks important conceptual clarity when considering the area of sexual abuse resiliency. Considerable theoretical effort has been dedicated to this phenomena in certain specific areas of human development (e.g., children) with empirical endeavors to validate it's relevance. To date there seems to be consensus with the notion that three specific variables are correlated with resiliency outcomes, namely, biological, psychological and social influences. It is posited that these three primary variables and their substantive variables independently, as well as interactively, buffer the effects of abuse one may experience during the course of a life time. It is the intent of this Honors Thesis to initially examine the realm of abuse in general with focused attention on sexual abuse. Secondly, biological, psychological and social variables which may be associated with resiliency will be examined. Finally, a methodology for further examination of the impact of these three variables will be posited.
Measurement of the transient shielding effectiveness of shielding cabinets
Creators: name: Herlemann, H.
name: Koch, M.
Publisher: name: Göttingen : Copernicus GmbH
Year: 2008
Subjects: subject: Comsol multiphysics
subject: Electric and magnetic fields
subject: Function of frequency
subject: Magnetic shielding effectiveness
subject: Shielding effectiveness
subject: Shielding performance
subject: Simulations and measurements
subject: Transient electromagnetic fields
subject: Enclosures
subject: Magnetic shielding
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau::621 | Angewandte Physik::621,3 | Elektrotechnik, Elektronik

description: Recently, new definitions of shielding effectiveness (SE) for high-frequency and transient electromagnetic fields were introduced by Klinkenbusch (2005). Analytical results were shown for closed as well as for non closed cylindrical shields. In the present work, the shielding performance of different shielding cabinets is investigated by means of numerical simulations and measurements inside a fully anechoic chamber and a GTEM-cell. For the GTEM-cell-measurements, a downscaled model of the shielding cabinet is used. For the simulations, the numerical tools CONCEPT II and COMSOL MULTIPHYSICS were available. The numerical results agree well with the measurements. They can be used to interpret the behaviour of the shielding effectiveness of enclosures as function of frequency. From the measurement of the electric and magnetic fields with and without the enclosure in place, the electric and magnetic shielding effectiveness as well as the transient shielding effectiveness of the enclosure are calculated. The transient SE of four different shielding cabinets is determined and discussed. © Author(s) 2008.
title: At the New Yorker
Creators: name: Anderson, Therese
Publisher: name: Utah State University
Year: 1996

description: The following essays and letters grew from a notebook I kept while interning at The New Yorker last summer. Each night, in my room at the boardinghouse on 36th Street, I recorded the decorations of the day, like the conversation I had with a prominent writer in the lunchroom, or the sight of a startled shorebird on the front of the office building.
title: Effects of Copper on Oxidative Stress and Growth of Pseudomonas putida
Creators: name: Marshall, Tiffany
Publisher: name: Utah State University
Year: 1996

description: Oxygen is an essential compound in all aerobic systems; however, it can also take part in toxic reactions involving active oxygen species (AOS) and transition metals. Most of the time, antioxidant enzymes act as defense mechanisms and keep the production of AOS to a minimum. However, if the defense mechanisms are not adequate, damage may occur and possibly lead to the breakdown of biomolecules such as DNA, lipids, and proteins that are vital to both simple and complex organisms. Oxidative damage could also be a contributing factor to many human pathological conditions including, aging, atherosclerosis, carcinogenesis, diabetes mellitus, lung cancer, and stroke (1, 2, 4, 5, 6, 8, 11).
The chemistry of dust formation in red supergiants
Creators: name: Cherchneff, Isabelle
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Massive stars in their late stages of evolution as Red Supergiants experience mass loss. The resulting winds show various degrees of dynamical and chemical complexity and produce molecules and dust grains. This review summarises our knowledge of the molecular and dust components of the wind of Red Supergiants, including VY CMa and Betelgeuse. We discuss the synthesis of dust as a non-equilibrium process in stellar winds, and present the current knowledge of the chemistry involved in the formation of oxygen-rich dust such as silicates and metal oxides.
description: 10 pages, 3 figures, Betelgeuse workshop, November 2012, Paris. To be published in the European Astronomical Society Publications Series, editors: Pierre Kervella, Thibaut Le Bertre & Guy Perrin
title: The Brigham City Co-Op: Case Study of an Efficient Economic and Social Institution
Creators: name: Valentine, Stephen J.
Publisher: name: Utah State University
Year: 1995

description: The leaders of the Church of Jesus Christ of Latter-day Saints raced a twin dilemma in the years between 1868 to 1874. The specter of non-Mormon infiltration of society and destruction of the Mormon empire loomed menacingly on the horizon, and internal divisions and inequities threatened to destroy the religious ideals of unity and equality fostered by Mormons since the time of Joseph Smith, Jr. This twin crisis led Mormon leaders to institute church-wide economic and social programs of reform, culminating in 1874 with the establishment of the Second United Order of Enoch.
title: The Acoustic Transparency of Ad*Hear Wax Guards When Measuring DPOAEs
Creators: name: Shelton, Tiffany Lloyd
Publisher: name: Utah State University
Year: 1994

description: Approximately one to six of every 1,000 children is born deaf or with some degree of permanent hearing loss (Parving, 1993; Watkins, Baldwin, & McEnery, 1991; White, & Behrens, 1993). Reduced hearing acuity during infancy and early childhood may interfere with the development of the child's speech and verbal language skills (NIH, 1993). Reduced auditory input can also have harmful effects on the child's social, emotional, cognitive, and academic development (NIH, 1993). Because hearing is crucial for the development of speech and verbal language skills, the developmental future of a child born with a significant hearing loss depends greatly on early identification of the loss (Healthy People 2000, 1990).
title: The Effect of Peer Counseling Training and Experience on Peer Counselors
Creators: name: McFarland, Holly Day
Publisher: name: Utah State University
Year: 1996

description: This study was designed to measure improvement in communication skills of 11 peer counselors after training. The instrument utilized was the Interpersonal Communication Inventory which was given in a pretest-treatment-posttest format. The treatment consisted of a three month intensive training program which emphasized improving communication skills in the areas of listening, empathy and understanding. The results indicated that the peer counselors improved their communication skills dramatically. The mean on the pretest was 83.82, while the mean after the treatment was 100.09.
A set-theoretic generalization of dissipativity with applications in Tube MPC
Creators: name: Villanueva, Mario Eduardo
name: Lazzari, Elena De
name: Müller, Matthias A.
name: Houska, Boris
Publisher: name: Amsterdam [u.a.] : Elsevier
Year: 2020
Subjects: subject: Digital control systems
subject: Predictive control systems
subject: Dissipativity
subject: External disturbances
subject: General class
subject: Nonlinear discrete-time systems
subject: Set-based analysis
subject: Stability analysis
subject: Theoretical development
subject: Theoretical foundations
subject: Discrete time control systems
subject: Model predictive control
subject: Robust control
subject: Dewey Decimal Classification::000 | Allgemeines, Wissenschaft::000 | Informatik, Wissen, Systeme
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: This paper introduces a framework for analyzing a general class of uncertain nonlinear discrete-time systems with given state-, control-, and disturbance constraints. In particular, we propose a set-theoretic generalization of the concept of dissipativity for systems that are affected by external disturbances. The corresponding theoretical developments build upon set based analysis methods and lay a general theoretical foundation for a rigorous stability analysis of economic tube model predictive controllers. ¬© 2020 The Authors
On the Randers metrics on two-step homogeneous nilmanifolds of dimension five
Creators: name: Moghaddam, H. R. Salimi
Publisher: name: arXiv
Year: 2013
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 22E60, 53C60, 53C30

description: In this paper we study the geometry of simply connected two-step nilpotent Lie groups of dimension five. We give the Levi-Civita connection, curvature tensor, sectional and scalar curvatures of these spaces and show that they have constant negative scalar curvature. Also we show that the only space which admits left invariant Randers metric of Berwald type has three dimensional center. In this case the explicit formula for computing flag curvature is obtained and it is shown that flag curvature and sectional curvature have the same sign.
title: Environmental Mediation: An Assessment and Case Study of the Logan Canyon Highway Controversy
Creators: name: Parkinson, Jared Glenn
Publisher: name: Utah State University
Year: 1996

description: For a little more than twenty years, alternative methods of dispute management have been employed to address various environmental conflicts in order to avoid the more traditional method of litigation. Mediation is a voluntary process which involves face-to-face negotiation among parties and the use of a neutral third-party negotiator. Environmental mediation has helped manage disputes related to land use, natural resource management, use of public lands, water resources, energy development, air quality and toxins (Bingham 1986).
Polynomial Spectral collocation Method for Space Fractional Advection-Diffusion Equation
Creators: name: Tian, WenYi
name: Deng, Weihua
name: Wu, Yujiang
Publisher: name: arXiv
Year: 2012
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: This paper discusses the spectral collocation method for numerically solving nonlocal problems: one dimensional space fractional advection-diffusion equation; and two dimensional linear/nonlinear space fractional advection-diffusion equation. The differentiation matrixes of the left and right Riemann-Liouville and Caputo fractional derivatives are derived for any collocation points within any given interval. The stabilities of the one dimensional semi-discrete and full-discrete schemes are theoretically established. Several numerical examples with different boundary conditions are computed to testify the efficiency of the numerical schemes and confirm the exponential convergence; the physical simulations for Lévy-Feller advection-diffusion equation are performed; and the eigenvalue distributions of the iterative matrix for a variety of systems are displayed to illustrate the stabilities of the numerical schemes in more general cases.
description: 25 Pages, 22 figures
Boundary Behaviors for General Off-shell Amplitudes in Yang-Mills Theory
Creators: name: Zhang, Yun
name: Chen, Gang
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this article, we analyze the boundary behaviors of pure Yang-Mills amplitudes under adjacent and non adjacent BCFW shifts in Feynman gauge. We introduce reduced vertexes for Yang-Mills fields, prove that these reduced vertexes are equivalent to the original vertexes as for the study of boundary behaviors, which greatly simplifies our analysis of boundary behaviors. Boundary behaviors for adjacent shifts are readily obtained using reduced vertexes. Then we prove a theorem on permutation sum and use it to prove the improved boundary behaviors for non-adjacent shifts. Based on the boundary behaviors, we find that it is possible to generalize BCFW recursion relation to calculate general tree level off shell amplitudes.
description: 26 pages, 7 figures
Kosterlitz-Thouless phase transition and reentrance in an anisotropic 3-state Potts model on the generalized Kagome lattice
Creators: name: Zhao, Yang
name: Li, Wei
name: Xi, Bin
name: Zhang, Zhe
name: Yan, Xin
name: Ran, Shi-Ju
name: Liu, Tao
name: Su, Gang
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The unusual reentrant phenomenon is observed in the anisotropic 3-state Potts model on a gen- eralized Kagome lattice. By employing the linearized tensor renormalization group method, we find that the reentrance can appear in the region not only under a partial ordered phase as commonly known but also a phase without a local order parameter, which is uncovered to fall into the uni- versality of the Kosterlitz-Thouless (KT) type. The region of the reentrance depends strongly on the ratios of the next nearest couplings α = J2 /|J1 | and β = J3 /|J1 |. The phase diagrams in the plane of temperature versus β for different α are obtained. Through massive calculations, it is also revealed that the quasi-entanglement entropy can be used to accurately detect the KT transition temperature.
Grazing-incidence X-ray diffraction investigation of the coincidence site lattice of the Ge/Si(001) system
Creators: name: Barnscheidt, Yvo
name: Schmidt, Jan
name: Osten, H. Jörg
Publisher: name: Copenhagen : Munksgaard
Year: 2020
Subjects: subject: Edge dislocations
subject: Germanium metallography
subject: Silicon
subject: X ray diffraction
subject: Coincidence site lattices
subject: Different layers
subject: Epitaxially grown
subject: Gain information
subject: Grazing incidence X-ray diffraction
subject: Layer thickness
subject: Periodic arrays
subject: Satellite peaks
subject: Crystal lattices
subject: Dislocation network
subject: Ge/Si
subject: Grazing incidence
subject: Heteroepitaxy
subject: X-ray diffraction
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: The Ge/Si(001) system has been analysed by grazing-incidence X-ray diffraction on a standard laboratory X-ray diffraction tool. A periodic array of interfacial edge dislocations forms a coincidence site lattice (CSL) which yields equidistantly spaced satellite peaks close to Bragg peaks of the Ge layer and Si substrate. The diffraction behaviour of the CSL was analysed using 2θ/φ scans along [100], [110] and [310] directions as well as azimuthal φ scans which revealed a 90° angular symmetry of the CSL. Additionally, different layer thicknesses, from 10 to 580 nm, were analysed, focusing on the dependence of layer thickness on the glancing angles of the satellite peaks. This method provides the ability to analyse whether or not epitaxially grown layers exhibit a periodic array of dislocations, and gain information about the orientation of the interfacial edge dislocations.
Analyse der Störfestigkeit nichtlinearer Schaltungen gegenüber leitungsgebundenen elektromagnetischen Störungen mit multi-input Wiener/Hammerstein-Modellen
Creators: name: Stegemann, S.
name: John, Werner
name: Mathis, Wolfgang
Publisher: name: Göttingen : Copernicus GmbH
Year: 2012
Subjects: subject: Analogschaltung
subject: Störfestigkeit
subject: Wiener/Hammerstein-Ansatz
subject: Dewey Decimal Classification::600 | Technik

description: In dieser Arbeit wird der Einfluss von leitungsgebundenen Störungen untersucht, welche in einen beliebigen Eingang (Signaleingang, Spannungsversorgung, Masse-Potenzial, etc.) einer Analogschaltung einkoppeln. Die zu untersuchende Schaltung wird dazu durch einen Wiener/Hammerstein-Ansatz als nichtlineares System mit zwei Eingängen modelliert. Mit Hilfe dieses Blockmodells werden analytische Ausdrücke derjenigen Frequenzanteile bestimmt, die durch Intermodulationen zwischen Stör- und Eingangssignal am Ausgang einer Schaltung entstehen.
Rural Abandoned Mine Program: As Authorized by Section 406 of the Surface Mining Control and Reclamation Act of 1977: Environmental Impact Statement
Creators: name: Soil Conservation Service
name: Soil Conservation Service
Publisher: name: Unknown
Year: 1978
Subjects: Environmental Economics and Policy
Land Economics/Use
Resource /Energy Economics and Policy

description: The Rural Abandoned Mine Program (RAMP) will help landowners develop and apply plans for the reclamation, conservation, and development of eligible lands affected by coal mining. Participation in the program is voluntary. The program will be carried out in cooperation with conservation districts. RAMP provides cost sharing to landowners through long-term contracts funded through Congressional appropriations from the Abandoned Mine Reclamation Fund. This statement explores alternative methods to administer RAMP and the environmental consequences of the selected program alternative. It demonstrates that the environmental effects of individual actions under the program will not have significant adverse effects on the human environment. There will be cumulative impacts over the life of the program. These impacts will be caused by the reduction of acid mine drainage, erosion, and sedimentation. Streams, ponds, and land will be improved for fish, wildlife, and human use. Areas subject to landslides and other hazardous conditions will be stabilized, reducing safety hazards to people and property. Returning the land to beneficial use will improve productivity, increase economic return, enlarge the tax base, improve wildlife habitat, and enhance the visual quality of the landscape. The use of funds under this program is an irreversible and irretrievable commitment of resources. Final program rules and regulations will be issued 30 days after the final EIS is made available to the public.
Ansätze für eine Bifurkationsanalyse von RF LC-Tank VCOs unter Berücksichtigung nichtlinearer Bauelementegleichungen [Approaches for a bifurcation analysis of RF LC tank voltage-controlled oscillators in consideration of nonlinear equations of components]
Creators: name: Zorn, C.
name: Bremer, J.-K.
name: Mathis, Wolfgang
Publisher: name: Göttingen : Copernicus GmbH
Year: 2008
Subjects: subject: Bifurcation analysis
subject: LC tanks
subject: Voltage-controlled-oscillator
subject: Bifurcation (mathematics)
subject: Oscillistors
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau::621 | Angewandte Physik::621,3 | Elektrotechnik, Elektronik

description: Es wird ein alternativer Ansatz zum Entwurf von vollintegrierten LC Oszillatoren mit Hilfe der Andronov-Hopf Bifurkationsanalyse unter Einbeziehung eines nichtlinearen Overall-Modells für MOS-Transistoren (EKV-Modell) vorgestellt. Das in dieser Arbeit vorgestellte Verfahren beschreibt die MOS-Kapazität des VCOs über geometrische Gundgrößen, die damit nur als Längen- und Weitenverhältnisse in die Bifurkationsanalyse eingehen. Zur Beschreibung der MOS-Kapazität wurde ein Basic-Charge-Modell, wie es in den Arbeiten von Enz und Vittoz vorgestellt wurde, in Verbindung einer expliziten analytischen Näherung des Oberflächenpotenzials verwendet. Das Verfahren ermöglicht es, als zusätzlichen Freiheitsgrad für den Designer auch die Amplitude zur Optimierung der Bauteilparameter heranzuziehen und vorab eine genauere Abschätzung der Parameter des Varaktors zu erhalten. Zusammengefasst in einer Toolbox führt die Anwendung des Verfahrens auf einen grafischen Optimierungsprozess, mit dessen Hilfe die Parameter analytisch bestimmt werden können. Die verwendete Methode erweitert den von Hajimiri und Ham vorgestellten Entwurfsprozess von LC-Tank VCOs um eine Stabilitätsanalyse, die Berücksichtigung harmonischer höherer Ordnung und die physikalisch exakte Modellierung der Varaktorkapazitäten.
Oxidsulfidchloride der Lanthanide vom Typ M4OS4Cl2 (M = La–Nd)
Creators: name: Schleid, Thomas
name: Lissner, Falk
Publisher: name: Berlin : De Gruyter
Year: 1994
Subjects: subject: Crystal Structure
subject: Lanthanides
subject: Oxysulfide Chlorides
subject: Synthesis
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: Oxysulfide chlorides, M4OS4Cl2, of the lanthanides (M = La - Nd) are obtained upon the oxidation of the metals with sulfur in the presence of MOCl (or M2O3) and MCl3 in appropriate molar ratios. Additional NaCl or an excess of MCl3 serving as a flux provide even single crystalline material after reactions at 850 °C for seven days in sealed tantalum capsules. The crystal structure of M4OS4Cl2 (hexagonal, P63mc, no. 186, Z = 2; M = La: a = 933.19(3), c = 701.22(4) pm, c/a = 0.7514, R = RH = 0.020; M = Ce: a = 925.49(3), c = 694.13(3) pm, c/a = 0.7500; M = Pr: a = 919.72(4), c = 688.53(4) pm, c/a = 0.7486; M = Nd: a = 914.25(4), c = 683.12(4) pm, c/a = 0.7472, R = 0.022, Rw = 0.019) contains isolated O2--centered (M3+)4 tetrahedra which are surrounded by twelve S2- and six Cl-, capping vertices, edges, and faces of each tetrahedron and linking to other [OM4] units. Basically, the structure is identical to that of Ba4OCl6 if Ba2+ is substituted by M3+ and 2/3 of the CL- anions are replaced by S2- to secure charge neutrality in M4OS4Cl2. Different models for the Cl-/S2- replacement are presented on the basis of comparisons of the Madelung part of the lattice energy (MAPLE) with the MAPLE sum of the binaries (M2O3, M2S3, and MCl3).
The puzzle of metallicity and multiple stellar populations in the Globular Clusters in Fornax
Creators: name: D'Antona, F.
name: Caloi, V.
name: D'Ercole, A.
name: Tailo, M.
name: Vesperini, E.
name: Ventura, P.
name: Di Criscienzo, M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We examine the photometric data for Fornax clusters, focussing our attention on their horizontal branch color distribution and, when available, on the RR Lyr variables fraction and period distribution. Based on our understanding of the HB morphology in terms of varying helium content in the context of multiple stellar generations, we show that clusters F2, F3 and F5 must contain substantial fractions of second generation stars (~54-65%). On the basis of a simple chemical evolution model we show that the helium distribution in these clusters can be reproduced by models with cluster initial masses ranging from values equal to ~4 to ~10 times larger than the current masses. Models with a very short second generation star formation episode can also reproduce the observed helium distribution but require larger initial masses up to about twenty times the current mass. While the lower limit of this range of possible initial GC masses is consistent with those suggested by the observations of the low metallicity field stars, we also discuss the possibility that the metallicity scale of field stars (based on CaII triplet spectroscopy) and the metallicities derived for the clusters in Fornax may not be consistent with each other. The reproduction of the HB morphology in F2,F3,F5 requires two interesting hypotheses: 1) the first generation HB stars lie all at "red" colours. According to this interpretation, the low metallicity stars in the field of Fornax, populating the HB at colours bluer than the blue side ((V-I)o<=0.3 or (B-V)o<=0.2) of the RR Lyrs, should be second generation stars born in the clusters;a preliminary analysis of available colour surveys of Fornax field provides a fraction ~20% of blue HB stars, in the low metallicity range; 2) the mass loss from individual second generation red giants is a few percent of a solar mass larger than the mass loss from first generation stars.
description: 14 pages, 8 figures. Accepted for publication in MNRAS
title: To what extent do Career-long Professional Learning opportunities enable non-specialist primary teachers to teach Music successfully in the classroom?
Creators: name: Carrie, Julie
Publisher: name: University of Glasgow
Year: 2022

description: This research will investigate to what extent Career-Long Professional Learning opportunities support non-specialist primary teachers to teach Music confidently in the classroom. The researcher is the only primary Music specialist in their local authority and as such, has a responsibility to support primary classroom teachers to deliver Music. This study examines the experiences, and initial teacher training, of early-career teachers within the South-West Regional Improvement Collaborative in Scotland. While this research will focus on one geographical area in Scotland it is hoped that similarities in practice might be identified which potentially exist across Scottish education. The Literature Review examines current writing on primary teaching and curriculum including the need for ‘subject mastery’ and understanding of subject pedagogy. Literature would suggest that Music is a curriculum area where there is a lack of confidence and self-efficacy amongst generalist primary teachers globally. This study looks to investigate if this parallel is found within Scottish education. The researcher interviewed early-career teachers. For the purposes of this study this refers to teachers within the first five years of their careers. Participants were questioned about their initial education experiences, specifically Music training, and what professional learning opportunities they had been able to access throughout their early careers. Speaking with newly qualified teachers allowed the researcher to better understand how professional learning opportunities can impact on teaching and learning within the primary classroom. Teacher professional learning is also central to the prescribed standards required by teachers in Scottish education. To enable this study to consider the full implications on teacher professional learning and education, this study will also consider Teaching Scotland’s Future, often referred to as the Donaldson Review (2011), which is the most recent review of teacher education in Scotland. It is hoped that this research will provide a deeper understanding of the needs of generalist classroom teachers in relation to curriculum subjects to enable effective professional learning at all stages of teacher education.
Diversity of flux avalanche patterns in superconducting films
Creators: name: Vestgarden, J. I.
name: Shantsev, D. V.
name: Galperin, Y. M.
name: Johansen, T. H.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The variety of morphologies in flux patterns created by thermomagnetic dendritic avalanches in type-II superconducting films is investigated using numerical simulations. The avalanches are triggered by introducing a hot spot at the edge of a strip-shaped sample, which is initially prepared in a partially penetrated Bean critical state by slowly ramping the transversely applied magnetic field. The simulation scheme is based on a model accounting for the nonlinear and nonlocal electrodynamics of superconductors in the transverse geometry. By systematically varying the parameters representing the Joule heating, heat conduction in the film, and heat transfer to the substrate, a wide variety of avalanche patterns is formed, and quantitative characterization of areal extension, branch width etc. is made. The results show that branching is suppressed by the lateral heat diffusion, while large Joule heating gives many branches, and heat removal into the substrate limits the areal size. The morphology shows significant dependence also on the initial flux penetration depth.
description: 6 pages, 6 figures
Keskkonnakonflikti elueast meedias: Haabersti remmelga ja tselluloositehase konfliktide ajajoonte kaardistamine
Creators: name: Annast, Laura
name: Päll, Lona
name: Anne-Liis Rämson
Publisher: name: OSF
Year: 2023

description: Ilmunud: https://digilab.rara.ee/blogi/keskkonnakonfliktide-kajastus-meedias-2/
title: Pintadere – review of the object group »clay stamps« based on two findings from Sopron-Krautacker (Western Hungary)
Creators: name: Schwellnus, Franka
Publisher: name: University Library Heidelberg
Year: 2016

description: Tonstempel (Pintadere) sind als Fundgruppe in der Vorgeschichte bereits im südosteuropäischen Neolithikum nachgewiesen. Sie verbreiten sich in dieser Zeit, ausgehend vom Nahen Osten und Griechenland, über die Balkanländer bis nach Ungarn, Österreich und Norditalien, wobei ihr sehr vielfältiger Motivschatz bereits große Ähnlichkeit zu dem späterer Stücke zeigt. Die Tradition ist anschließend bis in die Urnenfelderzeit nicht mehr nachweisbar, erlebt dann aber in Süddeutschland und Böhmen eine neue Blüte. Die Motive scheinen nun leicht verändert und filigraner; ihre äußere Form beschränkt sich auf den Kreis. In der späthallstattzeitlichen Vekerzuggruppe der Großen Ungarischen Tiefebene und der äußersten Südwestslowakei treten Tonstempel gehäuft auf; die Motive ähneln den neolithischen, wobei sich einige Anklänge an den skythischen Tierstil finden. Ihre Vergesellschaftung mit Farbresten in Gräbern in dieser Zeit beweist ihre Funktion zum Stempeln von Farbe – allerdings muss fraglich bleiben, worauf gestempelt wurde, da entsprechende Funde fehlen. Nahe liegend ist die Verzierung eines weichen Untergrundes wie Haut, wofür auch die Berichte antiker Autoren sprechen.
description: Evidence of clay stamps (pintadere) appears as early as in Prehistory in the south-eastern Neolithic. In this period they are distributed from the Near East and Greece via the Balkan region to Hungary, Austria and northern Italy. The variety of motifs already shows great similarity to the examples that emerge later. After this the tradition of clay stamps is not detectable until the Urnfield culture, and then only in southern Germany and Bohemia. The motifs in this period are now slightly altered and more refined, with the shape of the stamp simplified to a circle. In the Vekerzug group of the late Hallstatt period, which is located in the Great Hungarian Plain und south-western part of Slovakia, clay stamps appear in large numbers. The motifs resemble the Neolithic examples, whereas some are reminiscent of the Scythian animal ornament. Their function for stamping colours has been demonstrated by graves in which stamps and traces of paint have been found in association, but due to the lack of specific findings it remains uncertain whether the colour was applied to skin, as reported by ancient authors.
title: Aurelius Theogeiton: a ship owner from the Syrian Arados on a trip to Italy
Creators: name: Schmidts, Thomas
Publisher: name: University Library Heidelberg
Year: 2016

description: Der marmorne Grabstein des Schiffseigners (naukleros) Aurelius Theogeiton aus dem syrischen Arados zeigt den Verstorbenen und eine einfache Schiffsdarstellung, die auf Antriebs- und Steuerelemente verzichtet. In der Inschrift wird Italien als Ziel seiner Tätigkeit eindeutig vermerkt, was ansonsten selten nachweisbar ist. Es handelt sich wohl um einen jener Eigner, die selbst als Schiffsführer zwischen dem östlichen Mittelmeer und Italien unterwegs waren. Der Grabstein datiert in das frühe 3. Jahrhundert, wohl nach der constitutio Antoniniana im Jahr 212. Sein ursprünglicher Aufstellungsort und somit auch der Ausgangspunkt der Aktivitäten des Aurelius Theogeiton lag im östlichen Mittelmeerraum, wahrscheinlich in Kleinasien.
description: The marble tombstone of the ship owner (naukleros) Aurelius Theogeiton from the Syrian Arados represents the deceased and a simple depiction of a ship lacking power and steering elements. The inscription clearly names Italy as the destination of his activity – information which is otherwise rarely found. He seems to have been one of those ship owners who navigated their vessels by themselves between the Eastern Mediterranean and Italy. The tombstone dates to the early 3rd century, probably after the constitutio Antoniana from AD 212. Its original site of erection and therefore starting point for the activities of Aurelius Theogeiton was located in the Eastern Mediterranean, most likely in Asia Minor.
Spin-orbit coupling in hydrogenated graphene
Creators: name: Gmitra, Martin
name: Kochan, Denis
name: Fabian, Jaroslav
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: First-principles calculations of the spin-orbit coupling in graphene with hydrogen adatoms in dense and dilute limits are presented. The chemisorbed hydrogen induces a giant local enhancement of spin-orbit coupling due to $sp^3$ hybridization which depends strongly on the local lattice distortion. Guided by the reduced symmetry and the local structure of the induced dipole moments we use group theory to propose realistic minimal Hamiltonians that reproduce the relevant spin-orbit effects for both single-side semihydrogenated graphene (graphone) and for a single hydrogen adatom in a large supercell. The principal linear spin-orbit band splittings are driven by the breaking of the local pseudospin inversion symmetry and the emergence of spin flips on the same sublattice.
description: 5 pages, 3 figures, supplemental material
title: ВЫБИРАЮТ ЛИ ЖИВОТНЫЕ ИГРУ?
Creators: name: Стерпу, Юлиана
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2022

description: В статье затрагивается тема игровой деятельности животных, приводится общий обзор игры как специфической деятельности животных, выдвинуто предположение о том, какие животные выбирают игру как произвольную деятельность.
title: A hoard of Roman bronze items from Viminacium
Creators: name: Špehar, Perica
Publisher: name: University Library Heidelberg
Year: 2016

description: In Viminacium, der Hauptstadt der Provinz Obermösiens, wurde neben den Überresten der Befestigung, weiteren Gebäuden, einem System von Wasserleitungen (Aquädukten) und mehreren Gräberfeldern auch eine bedeutende Zahl an Kleinfunden entdeckt. Während Erdarbeiten im Lager wurde ein Hortfund ausgegraben, der eine Vielfalt an Bronze - gegenständen enthielt, die aus Gegenständen zum Filtrieren des Weins, einer Schale, einer Öllampe, einer Kuhglocke sowie einem Gegenstand unbekannter Funktion bestanden. Der Hortfund kann der Epoche von der Mitte des 2. Jahrhunderts bis zur Mitte des 3. Jahrhunderts zugewiesen werden.
description: In Viminacium, capital of Upper Moesia, the remains of fortifications, buildings, a water supply network (aqueducts), several necropolises, as well as a significant quantity of small archaeological finds were discovered. During field works in the area of the military camp, a hoard was unearthed. It contained a variety of bronze objects which can be classified as utensils for filtrating wine, a dish, a lamp, a cowbell, as well as an item of unknown purpose. This hoard could be attributed to the period from the middle of the 2nd to the middle of the 3rd century.
Esinaine
Creators: name: Kaukonen, Elisabeth
Publisher: name: OSF
Year: 2023

description: Ilmunud https://digilab.rara.ee/blogi/kes-on-esinaine/ Uuringust on ilmunud teadusartikkel: Kaukonen, Elisabeth (2023). Kes on esinaine? Keel ja Kirjandus, 66(3), 328-336. https://doi.org/10.54013/kk783a4
Electronic and Optical Properties of Quantum Dots in Two-Dimensional Topological Insulators
Creators: name: Puzantian, Benjamin
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2023
Subjects: topological insulators
quantum dots

description: This thesis presents a theoretical study of the electronic and the optical properties of quasi two-dimensional quantum dots in topological insulators. A topological insulator is a semiconductor with an insulated bulk in which electronic states, localized at the edges of the material can be found. Two-dimensional topological insulators can be described by a simple k·p model given by the Bernevig-Hughes-Zhang (BHZ) Hamiltonian. Topological insulators have two topologically different phases: trivial and nontrivial, and can exist in one of them. We show that the trivial versus non-trivial properties of the BHZ Hamiltonian are characterized by the different topologies that arise when mapping the in-plane wavevectors through the BHZ Hamiltonian onto a Bloch sphere. In the topologically non-trivial case, edge states are formed in the nanoribbon, disc, and square quantum dot geometries. The number of states appearing in and the size of the energy gap of these quantum dots are controlled by the spatial dimensions: width W, radius R, and lateral size a, respectively. The energy spectra of these quantum dots were found by using exact diagonalization techniques. An analytical solution for the edge states with zero-energy in the bulk energy gap of the nanoribbon was derived. From this, the decay length of the edge state into the center of the quantum dot, and its position with respect to the physical edge were determined. Furthermore, the transition from the non-trivial to the trivial phase was realized by tuning the compressive strain in the quantum dot, which resulted in the edge states disappearing from the energy gap. Thus, straining HgTe topological insulator quantum dots can be used to control the quantized spin-Hall conductance via the emergence and disappearance of edge states. These findings can be used as a design model of a quantum strain sensor based on strain-driven transitions in a HgTe quantum dot in a topological insulator. Finally, the optical response of the bulk BHZ model to circularly polarized light was studied, yielding absorption coefficients with the strength dependent on the energy of the photons. From this study, it was found that circularly polarized light is selectively absorbed depending on the spin of the topological insulator. Building on this work may allow for an understanding of the role of edge states in optical transitions, and could enable a study of excitations in HgTe in quantum dots in topological insulators.
title: Playing at the frontier – on two Roman gaming boards from the limes hinterland
Creators: name: Schaflitzl, Andreas A.
Publisher: name: University Library Heidelberg
Year: 2016

description: Das Spielbrett von Nassenfels (Lkr. Eichstätt) lässt sich mit dem ludus XII scriptorum in Verbindung bringen. Hinsichtlich der Ausführung mit Dreiecken auf dem Spielfeld ist dem Autor nur eine Parallele – eine Spieltafel in Autun (Sâone-et-Loire/F) – bekannt. Das Spielbrett wurde flüchtig, aber durchaus mit geübter Hand in einen zum Trocknen ausgelegten Ziegel eingeritzt und diente den Ziegeleiarbeitern zur kurzweiligen Entspannung, bis dieses als Bauziegel ausgeliefert wurde. In einer Villa in Möckenlohe (Lkr. Eichstätt) fanden sich rechteckige Felder für die Kleine Mühle in einen Teller eingeritzt. Beide Beispiele zeigen, dass man sich in der Antike gerne Zeit für ein Spielchen nahm und hierfür oftmals stante pede ein Spielfeld aus gerade vorhandenen Materialien herstellte. Nicht vergessen werden darf jedoch, dass diese Spiele häufig um Geld gespielt wurden, also nicht zwingend der heitere Zeitvertreib im Vordergrund stand
description: The gaming board from Nassenfels (Lkr. Eichstätt) can be associated with the ludus XII scriptorum. In view of the execution of the triangles on the playing field the author only knows of one parallel, i.e. a gaming board in Autun (Sâone-et- Loire/F). The gaming board was incised in a tile laid out for drying, hastily but by all means with a trained hand. It served as distraction for the workers in the tilery until the building tile was delivered. In a villa in Möckenlohe (Lkr. Eichstätt) rect angular fields for the Small Nine Men’s Morris were incised in a plate. Both examples demonstrate the popularity of games in antiquity and that gaming boards were often made spontaneously from available material. However, it should not remain unconsidered that these games were often played for money which means that leisure was not necessarily the priority.