cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
An Analytical Model of Radiation-Induced Charge Transfer Inefficiency for CCD Detectors
Creators: name: Short, Alexander
name: Crowley, Cian
name: de Bruijne, Jos H. J.
name: Prod'homme, Thibaut
Publisher: name: arXiv
Year: 2013
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The European Space Agency's Gaia mission is scheduled for launch in 2013. It will operate at L2 for 5 years, rotating slowly to scan the sky so that its two optical telescopes will repeatedly observe more than one billion stars. The resulting data set will be iteratively reduced to solve for the position, parallax and proper motion of every observed star. The focal plane contains 106 large area silicon CCDs continuously operating in a mode where the line transfer rate and the satellite rotation are in synchronisation. One of the greatest challenges facing the mission is radiation damage to the CCDs which will cause charge deferral and image shape distortion. This is particularly important because of the extreme accuracy requirements of the mission. Despite steps taken at hardware level to minimise the effects of radiation, the residual distortion will need to be calibrated during the pipeline data processing. Due to the volume and inhomogeneity of data involved, this requires a model which describes the effects of the radiation damage which is physically realistic, yet fast enough to implement in the pipeline. The resulting charge distortion model was developed specifically for the Gaia CCD operating mode. However, a generalised version is presented in this paper and this has already been applied in a broader context, for example to investigate the impact of radiation damage on the Euclid dark-energy mission data.
description: 8 pages, 5 figures, paper accepted for publication in MNRAS
Irreversible magnetization switching using surface acoustic waves
Creators: name: Thevenard, Laura
name: Gourdon, Catherine
name: Duquesne, Jean-Yves
name: Peronne, Emmanuel
name: von Bardeleben, Hans Jürgen
name: Jaffres, Henri
name: Ruttala, Sankara
name: Lemaître, Aristide
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: An analytical and numerical approach is developped to pinpoint the optimal experimental conditions to irreversibly switch magnetization using surface acoustic waves (SAWs). The layers are magnetized perpendicular to the plane and two switching mechanisms are considered. In precessional switching, a small in-plane field initially tilts the magnetization and the passage of the SAW modifies the magnetic anisotropy parameters through inverse magneto-striction, which triggers precession, and eventually reversal. Using the micromagnetic parameters of a fully characterized layer of the magnetic semiconductor (Ga,Mn)(As,P), we then show that there is a large window of accessible experimental conditions (SAW amplitude/wave-vector, field amplitude/orientation) allowing irreversible switching. As this is a resonant process, the influence of the detuning of the SAW frequency to the magnetic system's eigenfrequency is also explored. Finally, another - non-resonant - switching mechanism is briefly contemplated, and found to be applicable to (Ga,Mn)(As,P): SAW-assisted domain nucleation. In this case, a small perpendicular field is applied opposite the initial magnetization and the passage of the SAW lowers the domain nucleation barrier.
description: 11 pages, 4 figures
Performance and reliability of a high efficiency flat plate collector - Final results on prototypes
Creators: name: Föste, Sebastian
name: Giovannetti, Federico
name: Ehrmann, Nicole
name: Rockendorf, Gunter
Publisher: name: London : Elsevier Ltd.
Year: 2014
Subjects: subject: Aluminum zinc oxide
subject: Collector efficiency
subject: Flat plate collector
subject: Indium tin oxide
subject: Low emitting coating
subject: Low-e
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: The paper presents the final results of our prototype investigations regarding the performance and reliability of a high efficiency flat plate collector with a gas-filled low-e double-glazing as transparent cover. The measured efficiency of an optimized prototype results in an increase in efficiency of 70 % at a temperature difference of 60 K (G = 500 W/m2) compared to a standard flat plate collector. The effect of additional antireflecting coatings and different gas fillings of the glazing is analyzed by prototype measurements. As the heat losses of the collector are significantly reduced by the low-e glazing, a stagnation temperature of 265 °C was determined at the absorber plate experimentally. The collector components have to withstand these increased temperature loads. Test and assessment methods for the long term stability of the hermetically sealed double-glazing against high temperatures and the combination of temperature and UV-radiation were developed and performed successfully. Further, the reliability of four prototype collectors was confirmed by a one-year outdoor-exposure test. A simplified economic analysis resulted in an optimum operating range for the collector of 80 °C to 110 °C compared to commercially available flat plate and evacuated tube collectors. As the main result of the research project, a new flat plate collector with a significantly increased performance and an experimentally proved reliability was developed up to a prototype status, which can be transferred to industrial production.
Chirale [beta]-Hydroxyester in der Synthese : Synthesen von (+)-3,6-Bis-Epi-Prosopin und 5,6-Dihydropyran-2-onen
Creators: name: Götz, Oliver
Publisher: name: Hannover : Universität
Year: 2001
Subjects: subject: Piperidinol alkaloids
subject: Prosopine
subject: Ratjadone
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: [no abstract]
Low-energy effective theory and two distinct critical phases in a spin-1/2 frustrated three-leg spin tube
Creators: name: Zhao, Yang
name: Gong, Shou-Shu
name: Wang, Yong-Jun
name: Su, Gang
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Motivated by the crystal structures of [(CuCl2tachH)3Cl]Cl2 and Ca3Co2O6, we develop a low-energy effective theory using the bosonization technique for a spin-1/2 frustrated three-leg spin tube with trigonal prism units in two limit cases. The features obtained with the effective theory are numerically elucidated by the density matrix renormalization group method. Three different quantum phases in the ground state of the system, say, one gapped dimerized phase and two distinct gapless phases, are identified, where the two gapless phases are found to have the conformal central charge c=1 and 3/2, respectively. Spin gaps, spin and dimer correlation functions, and the entanglement entropy are obtained. In particular, it is disclosed that the critical phase with c=3/2 is the consequence of spin frustrations, which might belong to the SU(2)k=2 Wess-Zumino-Witten-Novikov universality class, and is induced by the twist term in the bosonized Hamiltonian density.
description: 5 pages, 6 figures
Fatigue Analysis on Innovative 10 Mw Offshore Jacket Structure Using Integrated Design Approach
Creators: name: Glisic, Ana
name: Nguyen, Ngoc-Do
name: Schaumann, Peter
Publisher: name: Leibniz Universität Hannover
Year: 2018
Subjects: subject: Offshore Wind Turbine
subject: Integrated Design Approach
subject: Fatigue Limit State
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie::330 | Wirtschaft::333 | Boden- und Energiewirtschaft::333,7 | Natürliche Ressourcen, Energie und Umwelt
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau::624 | Ingenieurbau und Umwelttechnik

description: The fatigue limit state (FLS) of fixed offshore wind turbine structures is critical and difficult to handle. As it is the most common design driving criteria for offshore structures, the simulation and calculation of this phenomenon must be as accurate as possible. Research is needed to improve the current design. There are mainly two design approaches available: Integrated design approach (IDA) and Sequential design approach (SDA). The IDA, described in this paper, considers the coupled structural analysis of a whole wind turbine system exposed to wind- and wave-induced loads in an aero-hydro-elastic solver. The results given by solver are loads series, which are afterwards used for obtaining the stress series with stress concentration factors (SCF) included. The stresses are processed in terms of rainflow counting and finally, fatigue damage of a critical K-joint is obtained externally, to avoid the use of damage equivalent loads (DEL) as by default in the solver, but to calculate it by means of the Efthymiou principle. The whole procedure with methods is explained in this paper.
International baccalaureate : policy process in education
Creators: name: Hill, I
Publisher: name: University Of Tasmania
Year: 2023

description: This is a qualitative, historical case study in the area of international education using a policy process approach. The research explores the characteristics of policy formation and implementation which led to the creation, maintenance and expansion of the IB diploma and the IB Office (a private non-government organisation registered in Geneva); it covers events from 1920 to 1978. This research is guided by an assumption that the basic question of policy analysis is: who did what and why ? Existing policy process models are examined on a continuum from the rational to the political and a conceptual model is needed which accounts for human interaction without ignoring scientific reflection. This framework is a thee dimensional structure consisting of seven policy process stages, nine categories of actors and ten factors. Four stage of policy formation - problem definition, aggregation, agenda setting, policy decision - and three stages of policy implementation - design, administration, execution - are discussed. The following actors are identified: headmasters, teachers, parents, students, university staff, funding organisations, education officials. UNESCO. non-education professionals. Influential factors comprise technical analysis, family welfare, ideologies, self-interest and the following environmental context's: economic, educational, social, political, technological and international diffusion. The social context comprises demography, culture, history and geography. The research seeks to show the interdependence of the three elements: the policy process stages, the actors, and the factors which influence the actors during one or more of the policy process stages. Data is obtained from published literature, unpublished documents, interviews, conversations.
ХАЛҚ ҚАБУЛХОНАСИ ФАОЛИЯТИНИ ТАШКИЛ ЭТИШДА "ЗАМОНАВИЙ МЕНЕЖМЕНТ" ТИЗИМИНИНГ АҲАМИЯТИ
Creators: name: Очилдиев, Фазлиддин
Publisher: name: Zenodo
Year: 2024

description: Мамлакатимизнинг ўтган 31 йиллик мустақил тараққиёти давомида халқаро ҳамжамиятда тенг ҳуқуқли, ўзининг ва жаҳоннинг илғор давлатчилик анъаналарини уйғунлаштирадиган ўзига хос миллий давлатчилик принципларини яратиш устида кенг кўламда ишлар амалга оширилди. Ўзбекистон Президенти Ш.Мирзиёев таъкидлаганидек, бугун «янги Ўзбекистон халқининг сиёсий тафаккури, ижтимоий фаоллиги ва маданий савияси, онгу тафаккури юксалиб, миллион-миллион ватандошларимиз ўзларини ислоҳотлар жараёнига бевосита дахлдор деб билмоқда»
title: Examining Self-Contained and Integrated Physical Education Experiences Among Individuals with Visual Impairments
Creators: name: Coffey, Rebecca
Publisher: name: Old Dominion University Libraries
Year: 2019

description: Introduction. While research to date has examined the views of individuals with visual impairments toward integrated public-school physical education, little attention has been given to examining perspectives toward experiences at residential schools for those with visual impairments. By understanding the perspectives of those who attended physical education in both contexts, researchers can gain valuable information about particularities that can make experiences meaningful or challenging. The purpose of this study was to examine how individuals who experienced physical education in both integrated and residential school settings viewed their physical education class experiences. Methods. This study utilized a retrospective interpretative phenomenological approach (IPA) to investigate the experiences of individuals with visual impairments in two distinct physical education contexts. Five adults with visual impairments (aged 20 to 35 years; three males, two females) were enrolled in this study. Data collection for this study included semi-structured telephone interviews and reflective interview notes. Interview data were audio-recorded and transcribed verbatim, and data were analyzed thematically using a process guided by IPA. Results. Based on the data analysis, two interrelated themes emerged from the participants transcripts, (a) feelings about inclusion and exclusion, and (b) support needs met at residential schools. The first theme described participants reflections that across school settings, feelings about inclusivity and exclusivity were central to how the participants understood their physical education experiences. The second theme described how perceived teacher support and feelings of relatedness with peers were identified by the participants as important factors related to their willingness to explore the environment and engage in physical education curricula. Discussion. Across school settings, feelings about the inclusivity and exclusivity were central to how the participants understood their physical education experiences. Positive experiences in physical education, which includes engagement and success, are often influenced by supportive teacher behaviors and peer relationships (Coates & Vickerman, 2008; Haegele & Sutherland 2015). Implications for practice. The findings of this study provide teachers a depiction of experiences in two settings that can help them understand what is needed of them to provide meaningful physical education experiences for students with visual impairments.
Erfassung der HF-Exposition in typischen Alltagsszenarien
Creators: name: Bornkessel, Christian
name: Hein, Matthias A.
Publisher: name: Aachen : Apprimus
Year: 2016
Subjects: subject: HF-Exposition
subject: HF-EMF
subject: Exposition
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau::621 | Angewandte Physik::621,3 | Elektrotechnik, Elektronik

description: In dosimetrischen Messstudien zur Untersuchung der Exposition der Allgemeinbevölkerung durch hochfrequente elektromagnetische Felder (HF-EMF) standen in den letzten Jahren primär einzelne Funkdienste der Mobilkommunikation und des drahtlosen Internetzugangs (z.B. UMTS, WiMAX, LTE) und dabei insbesondere die Immissionen der Basisstationen im Vordergrund. Gemäß den Vorgaben der 26. BImSchV [1] wurden diese Immissionen bei unterstellter maximaler Sendeleistung der Funkanlage ermittelt, die auch bei der Zulassung derartiger Anlagen relevant ist. In der öffentlichen Diskussion stellt sich jedoch zunehmend die Frage, wie groß die persönliche Gesamtexposition durch verschiedenartige HF-Quellen ist und in welchem Verhältnis die Beiträge durch KörperkontaktQuellen (eigenes Mobiltelefon), körpernahe Endgeräte (umliegende Endgeräte sowie HFQuellen im unmittelbarere Nähe) sowie körperferne Sendeanlagen (externe Sendeanlagen, wie z.B. Rundfunkoder Mobilfunkanlagen) zueinander stehen. Im Fokus des Interesses stehen dabei Informationen zur mittleren momentan vorliegenden, tatsächlichen Exposition und zu deren Größenordnung und Verteilung in typischen Alltagszenarien. Zu dieser Fragestellung gibt es derzeit nur wenige Untersuchungen. In einigen, z.T. epidemiologischen Messstudien wurden z.B. Personendosimeter eingesetzt (z.B. [2]), wobei diese eine begrenzte Empfindlichkeit (ca. 0,05 V/m) sowie teilweise erhebliche Messunsicherheiten u.a. durch das Tragen der Dosimeter am Körper (Abschattungseffekte) aufweisen. Die meisten Messwerte in diesen Studien lagen unter der Nachweisgrenze der Dosimeter. Ein weiteres Merkmal der Studien ist, dass die Immissionen zumeist nicht systematisch ermittelt wurden, was die Auswahl der Szenarien und die Festlegung der Messpunkte betrifft. In der hier vorgestellten, durch das Informationszentrum Mobilfunk e.V. (IZMF) unterstützten Studie wurde die Immission mit empfindlicheren spektrumanalysatorbasierten Messgeräten erfasst. Zum Einsatz kam das Gerät SRM-3006 der Firma Narda Safety Test Solutions, das neben einer guten Empfindlichkeit vor allem auch eine besonders effiziente Messung mehrerer spektral getrennter Funkdienste in einem Messdurchlauf gestattet. Die systematische Auswahl der Messpunkte sowie das eingesetzte Messverfahren sind im nächsten Kapitel detailliert beschrieben.
A Model for the Correlation of Hard X-ray Index with Eddington Ratio in Black Hole X-ray Binaries
Creators: name: Qiao, ErLin
name: Liu, B. F.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Observations show that there is a positive correlation between Eddington ratio $λ$ and hard X-ray index $Γ$ for $λ\gtrsim 0.01$, and there is an anti-correlation between $λ$ and $Γ$ for $λ\lesssim 0.01$ in black hole X-ray binaries (with $λ=L_{\rm bol}/L_{\rm Edd}$). In this work, we theoretically investigate the correlation between $Γ$ and $λ$ within the framework of disk-corona model. We improve the model by taking into account all cooling processes including synchrotron and self-Compton radiations in the corona, Comptonization of the soft photons from the underlying accretion disk, and the Bremsstrahlung radiations. Presuming that the coronal flow above the disk can reach up to 0.1 Eddington rate at the outer region, we calculate the structure of the two-phase accretion flows and the emergent spectra for accretion rates from 0.003 to 0.1. It is found that at accretion rates larger than $\backsim 0.01$ Eddington rate a fraction of coronal gas condenses into the disk and an inner disk can be sustained by condensation. In this case, the X-ray emission is dominated by the scattering the soft photon from the underlying disk in the corona. The emission from the inner disk and corona can produce the positive correlation between $λ$ and $Γ$. While at accretion rates lower than $\backsim 0.01$ Eddington accretion rate, the inner disk vanishes completely by evaporation, the accretion is dominated by ADAF, in which the X-ray emission is produced by the Comptonization of the synchrotron and bremsstrahlung photons of ADAF itself. The emission from ADAF can produce the anti-correlation between $λ$ and $Γ$.
description: Accepted for publication by ApJ
Pole coordinates from the analysis of LLR data
Creators: name: Biskupek, Liliane
name: Hofmann, Franz
name: Müller, Jürgen
Publisher: name: Hannover : Institutionelles Repositorium der Leibniz Universität Hannover
Year: 2018
Subjects: subject: Lunar Laser Ranging
subject: Pole coordinates
subject: Polkoordinaten
subject: Dewey Decimal Classification::500 | Naturwissenschaften::520 | Astronomie, Kartographie

description: The observations from Lunar Laser Ranging (LLR) are analysed and various parameters of the Earth-Moon system are determined by least-squares adjustment (e.g., station and reflector coordinates, lunar orbit and rotation). It is also possible to investigate EOPs like xP, yP and UT0-UTC from LLR data. In our previous study, the EOPs were determined in a post processing step after the global least-squares adjustment. However, in this way the correlation between EOPs and other parameters of the Earth-Moon system could not be investigated. In our recent analysis, values for xP, yP and UT0-UTC are determined directly in the global adjustment. Correlations with other parameters of the Earth-Moon system are automatically obtained. The LLR results for the EOPs are also compared to results determined from VLBI and GPS.
Grading by Category: A simple method for providing students with meaningful feedback on exams in large courses
Creators: name: Paul, Cassandra
name: Potter, Wendell H.
name: Weiss, Brenda
Publisher: name: arXiv
Year: 2013
Subjects: subject: Physics Education (physics.ed-ph)
subject: FOS: Physical sciences

description: Many instructors choose to assess their students using open-ended written exam items that require students to show their understanding of physics by solving a problem and/or explaining a concept. Grading these items is fairly time consuming, and in large courses time constraints prohibit providing significant individualized feedback on students' exams. Instructors typically cross out areas of the response that are incorrect and write the total points awarded or subtracted. Sometimes, instructors will also write a word or two to indicate the error. This paper describes a grading method that provides greater individualized feedback, clearly communicates to students expected performance levels, takes no more time than traditional grading methods for open-ended responses, and seems to encourage more students to take advantage of the feedback provided.
description: Also submitted to The Physics Teacher (5 pages), fixed typo in this version
Graphene transistors for bioelectronics
Creators: name: Hess, Lucas H.
name: Seifert, Max
name: Garrido, Jose A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: This paper provides an overview on graphene solution-gated field effect transistors (SGFETs) and their applications in bioelectronics. The fabrication and characterization of arrays of graphene SGFETs is presented and discussed with respect to competing technologies. To obtain a better understanding of the working principle of solution-gated transistors, the graphene-electrolyte interface is discussed in detail. The in-vitro biocompatibility of graphene is assessed by primary neuron cultures. Finally, bioelectronic experiments with electrogenic cells are presented, confirming the suitability of graphene to record the electrical activity of cells.
description: submitted to Proc. IEEE
Pure Geometrical Precise Orbit Determination of a LEO Based on GNSS Carrier Phase Observations
Creators: name: Shabanloui, Akbar
name: Ilk, Karl Heinz
Publisher: name: Leibniz Universität Hannover
Year: 2009
Subjects: subject: Pure Geometrical Precise Orbit Determination (GPOD)
subject: Low Earth Orbiter (LEO)
subject: GNSS Carrier Phase Observations
subject: pur geometrische Bahnbestimmung
subject: niedrigfliegende Satelliten
subject: GNSS Carrier Phase Beobachtungen
subject: Dewey Decimal Classification::500 | Naturwissenschaften::520 | Astronomie, Kartographie
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau::629,1 | Luft- und Raumfahrttechnik

description: The interest in a precise orbit determination of Low Earth Orbiters (LEOs) especially in pure geometrical mode using GNSS observations has been grown rapidly. Conventional GNSS-based strategies rely on the GNSS observations from a terrestrial network of ground receivers (IGS network) as well as the GNSS receiver on-board LEO in double difference (DD) or in triple difference (TD) data processing modes. With the advent of precise orbit and clock products at centimeter level accuracy provided by the IGS centers, the two errors associated with broadcast orbits and clocks can be significantly reduced. Therefore, higher positioning accuracy can be expected even when only a single GNSS receiver is used as zero difference (ZD) procedure. In this paper, the zero difference procedure has been applied to CHAMP high-low SST observations then the solution denoted as Geometrical Precise Orbit Determination (GPOD). The determination of absolute positions based on only carrier phase observations has the disadvantage that the ambiguity term must be determined in addition, but the advantage with respect to the positioning accuracy is significant. The estimated geometrical orbit of CHAMP is point-wise and its accuracy relies on the geometrical status of the GNSS satellites and on the number of tracked GNSS satellites as well as on the GNSS measurement accuracy in the data processing. The position accuracy of 2-3 cm of CHAMP based on high-low GPS carrier phase observations with zero difference procedure has been realized. These point-wise absolute positions can be used to estimate kinematical orbit of the LEOs.
Dumbbell micro-robot driven by flow oscillations
Creators: name: Vladimirov, Vladimir A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Mathematical Physics (math-ph)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences
subject: 76D07, 76Z10

description: In this paper we study the self-propulsion of a dumbbell micro-robot submerged in a viscous fluid. The micro-robot consists of two rigid spherical beads connected by a rod or a spring; the rod's/spring's length is changing periodically. The constant density of each sphere differs from the density of a fluid, while the whole micro-robot has neutral buoyancy. An effective oscillating gravity field is created via rigid-body oscillations of the fluid. Our calculations show that the micro-robot undertakes both translational and rotational motion. Using an asymptotic procedure containing a two-timing method and a distinguished limit, we obtain analytic expressions for the averaged self-propulsion velocity and averaged angular velocity. The important special case of zero angular velocity represents rectilinear self-propulsion with constant velocity.
description: 14 pages. arXiv admin note: substantial text overlap with arXiv:1210.0747, arXiv:1209.2835
Probing a liquid to glass transition in equilibrium
Creators: name: Kob, Walter
name: Berthier, Ludovic
Publisher: name: arXiv
Year: 2013
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We use computer simulations to investigate the static properties of a simple glass-forming fluid in which the positions of a finite fraction of the particles has been frozen in. By probing the equilibrium distribution of the overlap between independent configurations of the liquid, we find strong evidence that this random pinning induces a glass transition. At low temperatures, our numerical findings are consistent with the existence of a random first order phase transition rounded by finite size effects.
description: 7 pages
Effekt der Glycosylierung von CD16 (Fc[gamma]RIII) auf das IgG-Bindungsverhalten
Creators: name: Drescher, Bettina
Publisher: name: Hannover : Universität
Year: 2001
Subjects: subject: FcgammaRIII
subject: N-glycosylation
subject: IgG binding
subject: Dewey Decimal Classification::600 | Technik::610 | Medizin, Gesundheit
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie

description: [no abstract]
Systematic Effective Field Theory Analysis of the D=2+1 Quantum XY Model at Low Temperatures
Creators: name: Hofmann, Christoph P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The low-temperature properties of the (2+1)-dimensional quantum XY model are studied within the framework of effective Lagrangians up to three-loop order. At zero temperature, the system is characterized by a spontaneously broken spin rotation symmetry, O(2) $\to$ 1, where the corresponding Goldstone bosons are the spin waves or magnons. Even though there is no spontaneously broken order at finite $T$, the low-temperature behavior of the system is still governed by the spin waves. The partition function is evaluated and various thermodynamic quantities, including the order parameter, are derived in the presence of a weak external field. In particular, we show that the spin-wave interaction is repulsive at low temperatures, its magnitude depending on the strength of the external field. We compare our results with those for the (2+1)-dimensional antiferromagnetic Heisenberg model which, at T=0, exhibits the spontaneously broken spin rotation symmetry O(3) $\to$ O(2).
description: 31 pages, 9 figures
SCAFFOLDING TOOLS ENHANCE REFLECTIVE SPEAKING IN ART STUDENTS: A STUDY IN CREATIVE COMMUNICATION
Creators: name: Azizova, Gulnora
Publisher: name: Zenodo
Year: 2024

description: This study investigates the effectiveness of scaffolding tools in promoting reflective speaking skills among art students. Despite the inherent visual nature of their craft, art students often struggle to articulate their artistic process and intentions verbally. This research examines how structured prompts, visual aids, and guided dialogue can facilitate deeper reflection and clearer communication within the context of art critiques.
title: ‹Starke› und ‹schwache› Bilder zwischen Wissenschaft und Kunst. Überlegungen im Anschluss an Gottfried Boehm
Creators: name: Kruse, Christiane
Publisher: name: University Library Heidelberg
Year: 2015

description: kritische berichte - Zeitschrift für Kunst- und Kulturwissenschaften, Bd. 37, Nr. 4 (2009): kritische berichte, Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Dynamic behavior of stochastic gene expression models in the presence of bursting
Creators: name: Mackey, M. C.
name: Tyran-Kamińska, M.
name: Yvinec, R.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Probability (math.PR)
subject: Biomolecules (q-bio.BM)
subject: FOS: Mathematics
subject: FOS: Biological sciences
subject: 60J25, 60J28, 92C40

description: This paper considers the behavior of discrete and continuous mathematical models for gene expression in the presence of transcriptional/translational bursting. We treat this problem in generality with respect to the distribution of the burst size as well as the frequency of bursting, and our results are applicable to both inducible and repressible expression patterns in prokaryotes and eukaryotes. We have given numerous examples of the applicability of our results, especially in the experimentally observed situation that burst size is geometrically or exponentially distributed.
description: 22 pages
7er Rugby in der Schule: Ein Konzept Berührungen und Begegnungen zu ermöglichen. Eine qualitative Studie zur Thematisierung von Körperkontakt im Sekundarbereich 1.
Creators: name: Lubs, Harry
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2017
Subjects: subject: Rugby
subject: Sport
subject: Sekundarstufe eins
subject: Körperkontakt
subject: Berührungen
subject: Kämpfen
subject: Gymnasium
subject: Qualitative Studie
subject: Dewey Decimal Classification::600 | Technik::610 | Medizin, Gesundheit
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie::370 | Erziehung, Schul- und Bildungswesen

description: Mit dieser Masterarbeit wurde ein Konzept zur Vermittlung von Körperkontakt in der ersten Sekundarstufe durch das 7er Rugby entwickelt. Dieses richtet sich vor allem an im Rugby unerfahren Lehrer und Lehrerinnen. Basierend auf eine qualitativen Studie in der Pädagogen verschiedener Schulformen zum Rugby befragt wurden, steht am Ende der Masterarbeit ein vollständiger Stundenaufbau über sechs Doppelstunden zum 7er Rugby in der Sekundarstufe 1. Enthalten sind zudem die Regeln des Zielspiels, sodass gerade in der Sportart unerfahrene Lehrer und Lehrerinnen problemlos in der Lage sein werden, 7er Rugby zu vermitteln.
title: Gustav Adolf, Wallenstein und der Dreißigjährige Krieg in Franken. Ausstellung des Staatsarchivs Nürnberg zum Gedenkjahr 1632-1982. 22. Juni - 31. Juli 1982
Creators: name: Rechter, Gerhard
Publisher: name: University Library Heidelberg
Year: 2015

description: [nicht vorhanden / not available]
Optimisation Geometry
Creators: name: Manton, Jonathan H.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: This article demonstrates how an understanding of the geometry of a family of cost functions can be used to develop efficient numerical algorithms for real-time optimisation. Crucially, it is not the geometry of the individual functions which is studied, but the geometry of the family as a whole. In some respects, this challenges the conventional divide between convex and non-convex optimisation problems because none of the cost functions in a family need be convex in order for efficient numerical algorithms to exist for optimising in real-time any function belonging to the family. The title "Optimisation Geometry" comes by analogy from the study of the geometry of a family of probability distributions being called information geometry.
description: 14 pages
Study of an optical gradiometer for future satellite gravitational missions
Creators: name: Douch, Karim
name: Müller, Jürgen
name: Brieden, Phillip
name: Shabanloui, Akbar
Publisher: name: Leibniz Universität Hannover
Year: 2015
Subjects: subject: Optical Gradiometer
subject: Future Satellite Mission
subject: Optische Gradiometer
subject: zukünftige Satellitenmission
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau
subject: Dewey Decimal Classification::500 | Naturwissenschaften::520 | Astronomie, Kartographie

description: Monitoring the static and time-variable gravitational field based on new optical gradiometer based on interferometeric techniques is studied.
Die Umsetzung der Neuen Pflegefinanzierung im Kanton Zürich am Beispiel der Stadt Bülach
Creators: name: Knöpfli, Daniel
Publisher: name: Hochschule für Soziale Arbeit FHNW
Year: 2013
Subjects: subject: 300 - Sozialwissenschaften

description: Die Pflegefinanzierung in der Schweiz wurde im Rahmen des Neuen Finanzausgleichs per 1. Januar 2011 neu geordnet. Der Bundesgesetzgeber hat die Kantone verpflichtet, die Pflegerestkostenfinanzierung, die ein Teil der Neuen Pflegefinanzierung ist, selber zu regeln. Die vorliegende Arbeit geht Fragen aus der Pra-xis im Zusammenhang mit der konkreten Umsetzung der Neuen Pflegefinanzierung im Kanton Zürich am Beispiel der Stadt Bülach nach. Sie zeigt auf, wie die Neue Pflegefinanzierung entstanden ist und aus wel-chen Komponenten sie besteht. Anhand von konkreten Praxisfällen zeigt sie Herausforderungen und Prob-leme, aber auch Lösungsansätze auf. Die Arbeit wagt zudem einen Blick über die Kantonsgrenzen hinaus und zeigt in einem Vergleich von zwölf Kantonen, wie vielfältig die kantonalen Lösungen für die Pflegerest-kostenfinanzierung gestaltet sind. Auch Probleme, die aufgrund der föderalistischen Struktur und Gesetzge-bung entstehen, werden aufgezeigt und Lösungsansätze dazu formuliert. Praktikerinnen und Praktikern so-wie Politikerinnen und Politikern werden Lösungsansätze präsentiert, um die Neue Pflegefinanzierung so gut wie möglich weiterzuentwickeln.
title: Federschlange und Konigsgeier. Alt-Indianische Kulturen in Zentralamerika. Ausstellung der Naturhistorischen Gesellschaft Nürnberg e.V. 2. März - 31. August 1983
Creators: name: Lindner, Manfred
Publisher: name: University Library Heidelberg
Year: 2015

description: [nicht vorhanden / not available]
Nagy-Soper subtraction: a review
Creators: name: Robens, Tania
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this document, we present a review on an alternative NLO subtraction scheme, based on the splitting kernels of an improved parton shower that promises to facilitate the inclusion of higher order corrections into Monte Carlo event generators. We give expressions for the scheme for massless emitters, and point to work on the extension for massive cases. As an example, we show results for the C parameter of the process e+ e- -> 3 jets at NLO which have recently been published as a verification of this scheme. We equally provide analytic expressions for integrated counterterms that have not been presented in previous work, and comment on the possibility of analytic approximations for the remaining numerical integrals
description: 15 pages, 1 figure; submitted to MPLA
Validation of spectral sky radiance derived from all-sky camera images - a case study
Creators: name: Thosing, Korntip
name: Schrempf, Michael
name: Riechelmann, Stefan
name: Seckmeyer, Gunther
Publisher: name: Göttingen : Copernicus
Year: 2014
Subjects: subject: CCD Camera
subject: Luminance Distributions
subject: Field-Measurements
subject: Optical-Properties
subject: Irradiance
subject: Algorithm
subject: Skylight
subject: View
subject: CCD Kamera
subject: Leuchtdichteverteilung
subject: Feldmessung
subject: Optische Eigenschaften
subject: Strahlung
subject: Algorithmus
subject: Leuchtdichte
subject: Himmelsstrahlung
subject: Dewey Decimal Classification::500 | Naturwissenschaften::550 | Geowissenschaften

description: Spectral sky radiance (380–760 nm) is derived from measurements with a hemispherical sky imager (HSI)system. The HSI consists of a commercial compact CCD (charge coupled device) camera equipped with a fish-eye lens and provides hemispherical sky images in three reference bands such as red, green and blue. To obtain the spectral sky radiance from these images, non-linear regression functions for various sky conditions have been derived. The camera-based spectral sky radiance was validated using spectral sky radiance measured with a CCD spectroradiometer. The spectral sky radiance for complete distribution over the hemisphere between both instruments deviates by less than 20% at 500 nm for all sky conditions and for zenith angles less than 80 . The reconstructed spectra of the wavelengths 380–760 nm between both instruments at various directions deviate by less than 20% for all sky conditions.
Supplementary document for Cone Contrast Test-HD: Sensitivity and Specificity in Red–green Dichromacy and the Impact of Age - 6313722.pdf
Creators: name: Iizuka, Tatsuya
name: Kawamorita, Takushi
name: Handa, Tomoya
name: Ishikawa, Hitoshii
Publisher: name: Optica Publishing Group
Year: 2023
Subjects: Uncategorized

description: Figure S1 and Table S1
Parkraumkonzept Dreispitz. Analyse Ist-Zustand
Creators: name: Gedik, Kevin
Publisher: name: Hochschule für Architektur, Bau und Geomatik FHNW
Year: 2024
Subjects: subject: Dreispitzareal
subject: Parkplatzauslastung
subject: 624 - Ingenieurbau und Umwelttechnik

description: Diese Arbeit untersucht die aktuelle Parkplatzsituation auf dem Dreispitzareal in Basel-Stadt, mit dem Fokus auf die Anzahl, Auslastung und Nutzergruppen der vorhandenen Parkplätze. Insgesamt wurden 1’339 aktive Parkplätze erfasst, die sich auf die Allmend, Baurechtsparzellen und das Parkhaus Leimgrube verteilen. Die Analyse zeigt, dass die Parkplatzauslastung insgesamt gering ist, wobei die Spitzenwerte (60 % belegte Parkfelder) um die Mittagszeit erreicht wer-den und die Belegung in der Nacht deutlich abnimmt. Die Arbeit zeigt anhand einer Fallstudie im Bereich der Stuttgartstrasse mögliche Verbesserun-gen bezüglich des Angebotskonzepts auf. Hier könnte durch Mehrfachnutzung die Anzahl der benötigten Parkplätze reduziert und die Flächen für nachhaltige Nutzungen, wie Grünflächen, freigegeben werden. Zudem wird die Anzahl bestehender Parkfelder mit den gemäss unterschiedlichen Reglementen für das Dreispitzareal berechneten maximal möglichen Anzahl Parkfelder verglichen. Dabei wird festgestellt, dass die gemäss der kantonalen Parkraumverordnung für Bauzone 7 errechnete Maximalzahl deutlich geringer liegt als die heute tatsächlich vorhandene Anzahl an Parkfeldern. Eine Umstellung auf Zone 6 würde eine der auf dem Areal tatsächlichen Nutzungen besser Rechnung tragen, auch wenn die damit berechnete Maximalzahl den tatsächlichen Bedarf überschätzt. Es wird empfohlen, zukünftig eine bedarfsorientierte Planung durchzuführen und zusätzlich das Verkehrsaufkommen mit einem Fahrtenmodell zu steuern, um die Parkraumplanung besser an die tatsächlichen Bedürfnisse anzupassen.
Experimentelle Untersuchungen an einer Radialverdichterstufe mit verschiedenen Vorleitgittern variabler Geometrie
Creators: name: Hagelstein, Dirk
Publisher: name: Hannover : Universität
Year: 2001
Subjects: subject: Centrifugal compressor
subject: inlet guide vane
subject: control
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: [no abstract]
Assessing the Device-performance Impacts of Structural Defects with TCAD Modeling
Creators: name: Needleman, David Berney
name: Wagner, Hannes
name: Altermatt, Pietro P.
name: Buonassisi, Tonio
Publisher: name: Amsterdam : Elsevier
Year: 2015
Subjects: subject: dislocation
subject: grain boundary
subject: modeling
subject: photovoltaics
subject: silicon
subject: Solar cell
subject: Architecture
subject: FOS: Civil engineering
subject: Calculations
subject: Dislocations (crystals)
subject: Electric currents
subject: Electronic design automation
subject: Grain boundaries
subject: Heterojunctions
subject: Impurities
subject: Inverse problems
subject: Models
subject: Silicon
subject: Solar cells
subject: Solar power generation
subject: Device architectures
subject: Electron-beam-induced current
subject: First-principles calculation
subject: Heterojunction with intrinsic thin layers
subject: Multicrystalline silicon (mc-Si)
subject: Numerical simulation studies
subject: Photovoltaics
subject: Solar cell performance
subject: Defects
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: Advanced solar cell architectures like passivated emitter and rear (PERC) and heterojunction with intrinsic thin layer (HIT) are increasingly sensitive to bulk recombination. Present device models consider homogeneous bulk lifetime, which does not accurately reflect the effects of heterogeneously distributed defects. To determine the efficiency potential of multicrystalline silicon (mc-Si) in next-generation architectures, we present a higher-dimensional numerical simulation study of the impacts of structural defects on solar cell performance. We simulate these defects as an interfacial density of traps with a single mid-gap energy level using Shockley-Read-Hall (SRH) statistics. To account for enhanced recombination at the structural defects, we apply a linear scaling to the majority-carrier capture cross-section and scale the minority-carrier capture cross-section with the inverse of the line density of traps. At 300 K, our simulations of carrier occupation and recombination rate match literature electron-beam-induced current (EBIC) data and first-principles calculations of carrier capture, emission, and recombination for all the energy levels associated with dislocations decorated with metal impurities. We implement our model in Sentaurus Device, determining the losses across different device architectures for varying impurity decoration of grain boundaries.
title: Unravelling the Mechanism of the Ru/C‐Catalysed Isohexide and Ether Isomerization by Hydrogen Isotope Exchange
Creators: name: Engel, Rebecca V.
name: Niemeier, Johannes
name: Fink, Anja
name: Rose, Marcus
Publisher: name: Wiley-VCH
Year: 2023

description: In this article we show that the catalytic isomerization of isohexide sugar alcohols as well as their respective ethers can occur by a hydride-based mechanism rather than a dehydrogenation/re-hydrogenation. C−H bonds in α-position to hydroxy and ether groups are activated using Ru/C as solid catalyst at temperatures as high as 160 °C and above. Hydrogen isotope exchange experiments proved that a full hydride exchange and isomerization is possible for isohexides but unexpectedly also for their methyl ethers. This is of great importance as it proves the co-existence of the both mechanisms for reactions that were so far assumed to occur solely by a dehydrogenation/re-hydrogenation. Hence, this co-existence should be taken into account for kinetic investigations of such reaction systems especially in the conversion of biomass-based chemicals under hydrogenation conditions.
title: A Nose for Wine: all you Need to Know about Sommeliers
Creators: name: Cawley, Diarmuid
Publisher: name: Technological University of Dublin
Year: 2019

description: The longstanding image of sommeliers is one of older men, who dress formally and have a reputation for being arrogant. They know infinitely more than the customer, scoff at wine ignorance and always try to force expensive wines upon terrified patrons. Much like the "angry chef" and "fearsome restaurant critic" caricatures, the sommelier has been misunderstood and pigeonholed. The modern sommelier is the antithesis of this tired caricature.

Sommeliers are a particular entity within the broader hospitality industry. Their line of expertise is both complex and sophisticated yet simultaneously related to wine, something many people enjoy and have an interest in. Enlightened restaurateurs now know that having a dedicated wine expert on their staff adds enormous value to their product and that the position is equal to that of the head chef. While getting official qualifications and winning awards is important for many sommeliers, it is not as essential as having a passion for their work. Maintaining a humble attitude and learning every day is fundamental to success.
Experimentelle Entwicklung von Laser-kompressiven Bondprozessen mit niedrigschmelzenden eutektischen Legierungen auf flexiblen Substraten mit niedriger Glasübergangstemperatur
Creators: name: Cromwell, Kevin
Publisher: name: Hannover : Repositorium der Leibniz Universität Hannover
Year: 2016
Subjects: subject: laser bonding
subject: polymers
subject: low temperature
subject: Laser bonden
subject: Polymere
subject: Niedrigschmelzend
subject: Bonden
subject: Laserschweißen
subject: Eutektische Legierung
subject: Polymere
subject: Niedrigtemperatur
subject: Einfriertemperatur
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: Im Rahmen des Sonderforschungsbereichs SFB/TR 123 Planare Optronische Systeme sollen Methoden entwickelt werden, mit denen es möglich ist, dreidimensionale Komponenten elektrisch und mechanisch stabil zu Leiterbahnen auf flexiblen Substraten kontaktieren zu können, welche eine niedrige Glasübergangstemperatur haben. Bisher wurden experimentelle Parameterstudien zu dem eutektischen Bonden mit niedrigschmelzenden eutektischen Legierungen 52In48Sn und 66In34Bi mittels verschiedener Energiearten (Thermo-Kompression, Ultraschall) am Institut für Mikroproduktionstechnik erfolgreich durchgeführt und veröffentlicht. Im Rahmen dieses Projektes sollen Untersuchungen zum eutektischen Bonden mittels Laser-Kompression durchgeführt und zur mechanischen Stabilitätsgüte vorgenommen werden. Ziel ist es, eine stabile und elektrisch leitfähige Verbindung ohne thermo-mechanische Belastung des flexiblen Substrates herzustellen.
title: From Champagne with love...
Creators: name: Cawley, Diarmuid
Publisher: name: Technological University of Dublin
Year: 2019

description: Champagne’s romantic symbolism secured its status as the ultimate symbol of ardour and distinction.Its social gravitas is palpable, from the royal courts of 18th-century Europe to the film sets of Hollywood, and all manner of salient occasions in between.

A new confidence in Irish food and cooking has taken hold, Ireland is finally growing as a gastronomic nation, which not only consumes but cares about what it consumes. Appreciation for better wine is part of this transformation. It always starts with food – wine follows after. Through the insistence of sommeliers and some discerning producers, it has regained its place as a food-wine for serving throughout the meal.