cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: High Aspect Ratio GaN Fin Microstructures with Nonpolar Sidewalls by Continuous Mode Metalorganic Vapor Phase Epitaxy
Creators: name: Hartmann, Jana
name: Steib, Frederik
name: Zhou, Hao
name: Ledig, Johannes
name: Fündling, Sönke
name: Albrecht, Friederike
name: Schimpke, Tilman
name: Avramescu, Adrian
name: Varghese, Tansen
name: Wehmann, Hergo-Heinrich
name: Straßburg, Martin
name: Lugauer, Hans-Jürgen
name: Waag, Andreas
Publisher: name: ACS Publications
Year: 2016
Subjects: subject: GaN fins, GaN nanowalls, GaN nanosheets, GaN lamella, high aspect ratio non-polar a-plane GaN surfaces, 3D GaN
subject: 621

description: Three-dimensional GaN micro- and nanorods with high aspect ratio have recently gained substantial interest in LED research, due to their reduced defect density, their non-polar sidewalls and their increased active area. Here, we present an alternative geometry for high aspect ratio 3D nanostructures: vertically standing GaN “walls”, so called GaN fins. With high aspect ratios, these GaN fins exhibit the same interesting characteristics as their rod counterparts mentioned above. Beyond that, due to their geometry, the respective material analysis and device processing can be expected to be less complex. We are able to demonstrate the highly reproducible selective area growth of these fins by continuous mode MOVPE. Fin heights of more than 50 µm (aspect ratios of nearly 14) could be achieved and growth rates are as high as 22.8 µm/h in the beginning of the growth. The sidewalls are smooth non-polar <11-20> a-planes, suitable for optoelectronic devices due to the missing quantum-confined Stark effect and less edge effects compared to rods. We investigate the influence of pattern orientation and geometry on the fin morphology. Moreover, the influence of silane flow, which is known to enhance the vertical growth rate, and other growth parameters are systematically explored.
Baryonic states in supersymmetric Yang-Mills theory
Creators: name: Ali, Sajid
name: Bergner, Georg
name: Gerber, Henning
name: Lopez, Camilo
name: Montvay, Istvan
name: Münster, Gernot
name: Piemonte, Stefano
name: Scior, Philipp
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: In $\mathcal{N}$=1 supersymmetric Yang-Mills theory the superpartner of the gluon is the gluino, which is a spin 1/2 Majorana particle in the adjoint representation of the gauge group. Combining three gluinos, it is possible to form colour neutral bound states, analogous to baryons in QCD. The correlation functions of the corresponding baryonic operators contain a contribution represented by a `sunset diagram', and in addition, unlike in QCD, another contribution represented by a `spectacle diagram'. We present first results from an implementation and calculation of these objects, obtained from numerical simulations of supersymmetric Yang-Mills theory.
description: Proceeding of Science
Efficient Hamiltonian encoding algorithms for extracting quantum control mechanism as interfering pathway amplitudes in the Dyson series
Creators: name: Abrams, Erez
name: Kasprzak, Michael
name: Bhole, Gaurav
name: Ho, Tak-San
name: Rabitz, Herschel
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Hamiltonian encoding is a methodology for revealing the mechanism behind the dynamics governing controlled quantum systems. In this paper, following Mitra and Rabitz [Phys. Rev. A 67, 033407 (2003)], we define mechanism via pathways of eigenstates that describe the evolution of the system, where each pathway is associated with a complex-valued amplitude corresponding to a term in the Dyson series. The evolution of the system is determined by the constructive and destructive interference of these pathway amplitudes. Pathways with similar attributes can be grouped together into pathway classes. The amplitudes of pathway classes are computed by modulating the Hamiltonian matrix elements and decoding the subsequent evolution of the system rather than by direct computation of the individual terms in the Dyson series. The original implementation of Hamiltonian encoding was computationally intensive and became prohibitively expensive in large quantum systems. This paper presents two new encoding algorithms that calculate the amplitudes of pathway classes by using techniques from graph theory and algebraic topology to exploit patterns in the set of allowed transitions, greatly reducing the number of matrix elements that need to be modulated. These new algorithms provide an exponential decrease in both computation time and memory utilization with respect to the Hilbert space dimension of the system. To demonstrate the use of these techniques, they are applied to two illustrative state-to-state transition problems.
description: 18 + 10 pages, 10 + 3 figures. v2 published in Quantum. v3 fixes formatting and caption grammar
title: Growth mechanisms of GaN microrods for 3D core-shell LEDs: The influence of silane flow
Creators: name: Hartmann, Jana
name: Wang, Xue
name: Schuhmann, Henning
name: Dziony, Wanja
name: Caccamo, Lorenzo
name: Ledig, Johannes
name: Mohajerani, Matin Sadat
name: Schimpke, Tilman
name: Bähr, Markus
name: Lilienkamp, Gerhard
name: Daum, Winfried
name: Seibt, Michael
name: Straßburg, Martin
name: Wehmann, Hergo-Heinrich
name: Waag, Andreas
Publisher: name: Wiley
Year: 2015
Subjects: subject: GaN microrods, silane, Si-rich passivation layer, growth model
subject: 621

description: The three dimensional growth of GaN structures as a basis for the fabrication of 3D GaN core-shell LEDs has attracted substantial attention in the past years. GaN nanorods or microrods with high aspect ratios can be grown by selective area epitaxy on a GaN buffer through a SiOx mask. It has been found earlier that silane substantially initiates vertical growth, with the exact underlying mechanisms being still unclear. Here, the influence of silane on the 3D GaN column growth was investigated by performing detailed growth experiments in combination with a thorough surface analysis in order to get insight into these mechanisms. The vertical growth rate is significantly enhanced by high silane fluxes, whereas the saturation of growth rate with the time is reduced. Thus, homogenous GaN columns with an aspect ratio of more than 35 could be achieved. A thin Si-rich layer on the non-polar m-plane facets of the columns has been detected using a combination of transmission electron microscopy, energy dispersive X-ray spectroscopy and Auger electron spectroscopy. This layer is suggested to be the reason for the increase in growth rate, modifying the effective collection range of the species along the sidewalls, and preventing the lateral growth.
J-PLUS: analysis of the intracluster light in the Coma cluster
Creators: name: Jiménez-Teja, Y.
name: Dupke, R. A.
name: de Oliveira, R. Lopes
name: Xavier, H. S.
name: Coelho, P. R. T.
name: Chies-Santos, A. L.
name: López-Sanjuan, C.
name: Alvarez-Candal, A.
name: Costa-Duarte, M. V.
name: Telles, E.
name: Hernandez-Jimenez, J. A.
name: Benítez, N.
name: Alcaniz, J.
name: Cenarro, J.
name: Cristóbal-Hornillos, D.
name: Ederoclite, A.
name: Marín-Franch, A.
name: de Oliveira, C. Mendes
name: Moles, M.
name: Sodré, L.
name: Varela, J.
name: Ramió, H. Vázquez
Publisher: name: arXiv
Year: 2018
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The intracluster light (ICL) is a luminous component of galaxy clusters composed of stars that are gravitationally bound to the cluster potential but do not belong to the individual galaxies. Previous studies of the ICL have shown that its formation and evolution are intimately linked to the evolutionary stage of the cluster. Thus, the analysis of the ICL in the Coma cluster will give insights into the main processes driving the dynamics in this highly complex system. Using a recently developed technique, we measure the ICL fraction in Coma at several wavelengths, using the J-PLUS unique filter system. The combination of narrow- and broadband filters provides valuable information on the dynamical state of the cluster, the ICL stellar types, and the morphology of the diffuse light. We use the Chebyshev-Fourier Intracluster Light Estimator (CICLE) to disentangle the ICL from the light of the galaxies, and to robustly measure the ICL fraction in seven J-PLUS filters. We obtain the ICL fraction distribution of the Coma cluster at different optical wavelengths, which varies from $\sim 7\%-21\%$, showing the highest values in the narrowband filters J0395, J0410, and J0430. This ICL fraction excess is distinctive pattern recently observed in dynamically active clusters (mergers), indicating a higher amount of bluer stars in the ICL compared to the cluster galaxies. Both the high ICL fractions and the excess in the bluer filters are indicative of a merging state. The presence of younger/lower-metallicity stars the ICL suggests that the main mechanism of ICL formation for the Coma cluster is the stripping of the stars in the outskirts of infalling galaxies and, possibly, the disruption of dwarf galaxies during past/ongoing mergers.
description: 10 pages, 3 figures, 1 table. Accepted for publication in A&A
UGLEROD VA AZOT
Creators: name: Tashmurodova, Ra'no
Publisher: name: Zenodo
Year: 2024

description: Uglerod va azot tabiat dunyosining ishlashida hal qiluvchi rol o'ynaydigan ikkita muhim elementdir. Ikkala element ham yerdagi hayot uchun muhim ahamiyatga ega va ularning o'zaro ta'siri atrof-muhitga, ekotizimlarga va global uglerod va azot aylanishlariga sezilarli ta'sir ko'rsatadi. Uglerod va azotning xatti-harakati va dinamikasini tushunish iqlim o'zgarishi, ifloslanish va biologik xilma-xillikni yo'qotish kabi ekologik muammolarni hal qilish uchun juda muhimdir.
Niphadolepis bipunctata Hering 1929
Creators: name: Mbata, Keith J.
name: Prins, Jurate De
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Limacodidae
Niphadolepis
Niphadolepis bipunctata

description: Niphadolepis bipunctata Hering, 1929
COMMON NAME(S): Slug-caterpillar moth or Cup-cocoon moth.
SYNONYM(S): None.
IUCN STATUS: Not Evaluated (NE).
DISTRIBUTION: Democratic Republic of Congo, South Africa, Tanzania, Zambia.
LOCALITY IN ZAMBIA: ‘Lusaka’, in Lusaka Province.
LARVAL HOSTPLANT(S): Unknown.
SOURCES: De Prins & De Prins 2022.
description: Published as part of Mbata, Keith J. & Prins, Jurate De, 2023, Annotated checklist of moths of Zambia (Insecta: Lepidoptera), pp. 1-503 in Zootaxa 5354 (1) on page 61, DOI: 10.11646/zootaxa.5354.1.1, http://zenodo.org/record/10130434
title: 3D GaN Fins as a Versatile Platform for a-Plane-Based Devices
Creators: name: Hartmann, Jana
name: Manglano Clavero, Irene
name: Nicolai, Lars
name: Margenfeld, Christoph
name: Spende, Hendrik
name: Ledig, Johannes
name: Zhou, Hao
name: Steib, Frederik
name: Jaros, Angelina
name: Avramescu, Adrian
name: Strassburg, Martin
name: Trampert, Achim
name: Wehmann, Hergo-Heinrich
name: Lugauer, Hans-Jürgen
name: Voss, Tobias
name: Waag, Andreas
Publisher: name: Wiley
Year: 2018
Subjects: subject: GaN fins, threading dislocation density, a-plane sidewalls, selective area MOVPE, marker layers
subject: 621

description: GaN fins on GaN-on-sapphire templates are fabricated by continuous mode selective area metalorganic vapor phase epitaxy. The fins exhibit high aspect ratios and smooth nonpolar a-plane sidewalls with an ultra-low threading dislocation density of a few 105 cm^-2 making them ideally suited for optoelectronic to electronic applications. A detailed analysis of the inner structure of GaN fins is provided by the help of marker layer experiments and correlation of results from fins fabricated under different growth conditions, leading to the development of a growth model to explain the final geometry and optical as well as electrical properties of these high aspect ratio fins. Distinctly different material properties for the central and outer parts of the fins are detected. Whereas the outer sidewalls represent high quality GaN surfaces with
very low defect densities, a strong quenching of near band edge emission (NBE) in the central part of the fins is accompanied by heavy compensation of free electrons. A possible explanation is the incorporation of excessive point defects, like intrinsic defects or carbon impurity. The sidewall regions, however, prove to be highly suitable for device applications due to their strong NBE emission, low dislocation density and high free carrier concentration.
Koenikea (Koenikea) sorpresa Cook 1986
Creators: name: Orginal, Harry Smit
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Trombidiformes
Unionicolidae
Koenikea
Koenikea sorpresa

description: Koenikea (Koenikea) sorpresa Cook, 1986   New record — 1/0/0, pool downstream of Circular Pool, Karijini NP, 22°28.646′ S 118°33.773′
E, 601 m asl, 28 Jan. 2019.
 Distribution — Known from New South Wales, Queensland, Northern Territory and Western Australia.
description: Published as part of Orginal, Harry Smit, 2021, The water mites of Western Australia (Acari: Hydrachnidia), with the description of 13 new species, pp. 928-966 in Acarologia 61 (4) on page 951
Chiral supergravity and anomalies
Creators: name: Mielke, Eckehard W.
name: Macias, Alfredo
Publisher: name: arXiv
Year: 1999
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Similarily as in the Ashtekar approach, the translational Chern-Simons term is, as a generating function, instrumental for a chiral reformulation of simple (N=1) supergravity. After applying the algebraic Cartan relation between spin and torsion, the resulting canonical transformation induces not only decomposition of the gravitational fields into selfdual and antiselfdual modes, but also a splitting of the Rarita-Schwinger fields into their chiral parts in a natural way. In some detail, we also analyze the consequences for axial and chiral anomalies.
description: Plain Latex 25 pages, no figures. to appear in Annalen der Physik (Leipzig) 1999
Freezing, melting and the onset of glassiness in binary mixtures
Creators: name: Coslovich, Daniele
name: Galliano, Leonardo
name: Costigliola, Lorenzo
Publisher: name: arXiv
Year: 2024
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We clarify the relationship between freezing, melting, and the onset of glassy dynamics in a prototypical glass-forming mixture model. Our starting point is a precise operational definition of the onset of glassiness, as expressed by the emergence of inflections in time-dependent correlation functions. By scanning the temperature-composition phase diagram of the mixture, we find a disconnect between the onset of glassiness and freezing. Surprisingly, however, the onset temperature closely tracks the melting line, along which the excess entropy is approximately constant. At fixed composition, all characteristic temperatures display nonetheless similar pressure dependencies, which are very well predicted by the isomorph theory. While our results rule out a general connection between thermodynamic metastability and glassiness, they call for a reassessment of the role of crystalline precursors in glass-forming liquids.
description: 5 pages, 4 figures, supplementary material available as ancillary file; data and workflow to reproduce the findings of this work are available at https://doi.org/10.5281/zenodo.11443197
title: Study of 3D-growth conditions for selective area MOVPE of high aspect ratio GaN fins with non-polar vertical sidewalls
Creators: name: Hartmann, Jana
name: Steib, Frederik
name: Zhou, Hao
name: Ledig, Johannes
name: Nicolai, Lars
name: Fündling, Sönke
name: Schimpke, Tilman
name: Avramescu, Adrian
name: Varghese, Tansen
name: Trampert, Achim
name: Straßburg, Martin
name: Lugauer, Hans-Jürgen
name: Wehmann, Hergo-Heinrich
name: Waag, Andreas
Publisher: name: Elsevier BV
Year: 2017
Subjects: subject: A1. Crystal morphology, A3. Metalorganic vapor phase epitaxy, B.1 Gallium compounds, B.1 Nitrides, B.3 Light emitting diodes
subject: 621

description: GaN fins are 3D architectures elongated in one direction parallel to the substrate surface. They have the geometry of walls with a large height to width ratio as well as small footprints. When appropriate symmetry directions of the GaN buffer are used, the sidewalls are formed by non-polar {11-20} planes, making the fins particularly suitable for many device applications like LEDs, FETs, lasers, sensors or waveguides. The influence of growth parameters like temperature, pressure, V/III ratio and total precursor flow on the fin structures is analyzed. Based on these results, a 2-temperature-step-growth was developed, leading to fins with smooth side and top facets, fast vertical growth rates and good homogeneity along their length as well as over different mask patterns. For the core-shell growth of fin LED heterostructures, the 2-temperature-step-growth shows much smoother sidewalls and less crystal defects in the InGaN QW and p-GaN shell compared to structures with cores grown in just one step. Electroluminescence spectra of the 2-temperature-step-grown fin LED are demonstrated.
Spacetime Quantization from Non-abelian D-particle Dynamics
Creators: name: Mavromatos, Nick E.
name: Szabo, Richard J.
Publisher: name: arXiv
Year: 1998
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We describe the short-distance properties of the spacetime of a system of D-particles by viewing their matrix-valued coordinates as coupling constants of a deformed worldsheet $σ$-model. We show that the Zamolodchikov metric on the associated moduli space naturally encodes properties of the non-abelian dynamics, and from this we derive new spacetime uncertainty relations directly from the quantum string theory. The non-abelian uncertainties exhibit decoherence effects which suggest the interplay of quantum gravity in multiple D-particle dynamics.
description: 8 pages LATEX, one eps figure incorporated
title: Machine learning-enabled medical device materials (MLMDM)
Creators: name: Betz, Kaitlyn M.
name: Lowe, Beatrice L.
name: Hirsch, Daniela P.
name: Hawkins, Clinton L.
name: Pak, Alexander J.
name: Lowe, Terry C.
Publisher: name: Colorado School of Mines. Arthur Lakes Library
Year: 2024

description: Machine learning (ML) methods can provide exceptional enhancements to both the performance and manufacturing of medical device materials. Enhanced materials and methods to make them can transform medical device fabrication and healthcare. Improved quality assurance and real-time error detection become feasible with ML algorithms. Fabrication steps can be implemented with greater precision, efficiency, and waste minimization. Production parameters can be fine-tuned, including the prospect of tailoring materials and devices to individuals, enabling personalized care. We highlight three examples of ML technologies under development in our Transdisciplinary Nanostructured Materials Research Team (TNMRT). We are developing Convolutional Neural Networks (CNN) to develop 1) antimicrobial copper surface nanostructures, 2) ferrofluid methods to detect magnetic phases in stainless steel, and 3) optical image analyses to predict alloy formability to fabricate surgical devices.
Additional file 1: of On the edges of medicine â a qualitative study on the function of complementary, alternative, and non-specific therapies in handling therapeutically indeterminate situations
Creators: name: Ostermaier, Agnes
name: Barth, Niklas
name: Schneider, Antonius
name: Linde, Klaus
Publisher: name: figshare
Year: 2019
Subjects: subject: Medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Developmental Biology
subject: Cancer
subject: Science Policy

description: Interview guide. (DOCX 14 kb)
Time Inference with MUSE in Extragalactic Rings (TIMER): Properties of the Survey and High-Level Data Products
Creators: name: Gadotti, Dimitri A.
name: Sánchez-Blázquez, Patricia
name: Falcón-Barroso, Jesús
name: Husemann, Bernd
name: Seidel, Marja K.
name: Pérez, Isabel
name: de Lorenzo-Cáceres, Adriana
name: Martinez-Valpuesta, Inma
name: Fragkoudi, Francesca
name: Leung, Gigi
name: van de Ven, Glenn
name: Leaman, Ryan
name: Coelho, Paula
name: Martig, Marie
name: Kim, Taehyun
name: Neumann, Justus
name: Querejeta, Miguel
Publisher: name: arXiv
Year: 2018
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The Time Inference with MUSE in Extragalactic Rings (TIMER) project is a survey with the VLT-MUSE integral-field spectrograph of 24 nearby barred galaxies with prominent central structures (e.g., nuclear rings or inner discs). The main goals of the project are: (i) estimating the cosmic epoch when discs of galaxies settle, leading to the formation of bars; (ii) testing the hypothesis whereby discs in more massive galaxies are assembled first; and (iii) characterising the history of external gas accretion in disc galaxies. We present details on the sample selection, observations, data reduction, and derivation of high-level data products, including stellar kinematics, ages and metallicities. We also derive star formation histories and physical properties and kinematics of ionised gas. We illustrate how this dataset can be used for a plethora of scientific applications, e.g., stellar feedback, outflows, nuclear and primary bars, stellar migration and chemical enrichment, and the gaseous and stellar dynamics of nuclear spiral arms, barlenses, box/peanuts and bulges. Amongst our first results - based on a few selected galaxies -, we show that the dynamics of nuclear rings and inner discs is consistent with the picture in which they are formed by bars, that the central few hundred parsecs in massive disc galaxies tend to show a pronounced peak in stellar metallicity, and that nuclear rings can efficiently prevent star formation in this region. Finally, we present evidence that star-bursting nuclear rings can be fed with low-metallicity gas from low-mass companions.
description: Accepted for publication in MNRAS; 24 pages including 15 colour figures, two tables and an appendix; a version with high resolution figures can be found at http://www.sc.eso.org/~dgadotti/paper_1.pdf
title: Organisationsplan der TU Braunschweig, Fakultät Architektur, Bauingenieurwesen und Umweltwissenschaften Umbenennung des „Instituts für Grundbau und Bodenmechanik" in „Institut für Geomechanik und Geotechnik"
Creators: name: :None
Publisher: name: Technische Universität Braunschweig. Fakultät 3
Year: 2019
Subjects: subject: Organisationsplan
subject: 379

description: Hochschulöffentliche Bekanntmachungen der Technischen Universität Braunschweig, vol. 1282
Near-field radiative heat transfer between a nanoparticle and a graphene grating
Creators: name: Luo, Minggang
name: Jeyar, Youssef
name: Guizal, Brahim
name: Antezza, Mauro
Publisher: name: arXiv
Year: 2024
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Applied Physics (physics.app-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We investigate the near-field radiative heat transfer between a normally and/or laterally shifted nanoparticle and a planar fused silica slab coated with a strip graphene grating. For this study we develop and use a scattering matrix approach derived from Fourier modal method augmented with local basis functions. We find that adding a graphene sheet coating on the slab can already enhance the heat flux by about 85%. We show that by patterning the graphene sheet coating into a grating, the heat flux is further increased, and this happens thanks to the a topological transition of the plasmonic modes from circular to hyperbolic one, which allows for more energy transfer. The lateral shift affects the accessible range of high-$k$ modes and thus affects the heat flux, too. By moving the nanoparticle laterally above the graphene grating, we can obtain an optimal heat flux with strong chemical potential dependance above the strips. For a fixed graphene grating period ($D=1μ$m) and not too large normal shift (separation $d<800$nm), two different types of lateral shift effects (e.g., enhancement and inhibition) on heat transfer have been observed. As the separation $d$ is further increased, the lateral shift effect becomes less important. We show that the lateral shift effect is sensitive to the geometric factor $d/D$. Two distinct asymptotic regimes are proposed: (1) the inhibition regime ($d/D<0.85$), where the lateral shift reduces the heat transfer, and (2) the neutral regime ($d/D \geq 0.85$) where the effect of the lateral shift is negligible. In general, we can say that the geometric factor $d/D \approx 0.85$ is a critical point for the lateral shift effect. Our predictions can have relevant implications to the radiative heat transfer and energy management at the nano/micro scale.
description: 12 pages, 13 figures
Order Parameter Symmetry in Doped YBCO Systems
Creators: name: Mohanty, P. K.
name: Taraphder, A.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Intense experimental and theoretical efforts have recently been brought to bear on the determination of the symmetry of superconducting order parameter in high T$_c$ Cuprates as this would shed light on the nature of microscopic interactions that are responsible for superconductivity in these unusual systems. We use a two band model that reproduces the Fermi surface seen in ARPES experiments of Shen et al., and study the symmetry of order parameter in the YBCO system. The model incorporates the effects of tunnelling in the c-direction between the planes and chains of these Cuprates. It is observed that a suitable choice of the phase of the pair wave-function in the planes and chains lead to both s- and d-wave like features. We calculate the detailed phase diagram of this system, observe the shift in the position of the node(s) of the order parameter(s) on the Fermi surface with doping and explain the seemingly contradictory experimental observations about the presence of both s- and/or d-wave symmetry in these systems.
description: 11 pages, 4 Postscript figures, Latex. Minor typographical changes
Writing the Nation in Early Modern England: The Case of Rhetoric and Poetics
Creators: name: Schmitt, Christian
Publisher: name: Gramma: Journal of Theory and Criticism
Year: 1997

description: Το άρθρο επικεντρώνει την προσοχή του σε αγγλικές πραγματείες για τη ρητορική και την ποιητική που χρονολογούνται στον 16o και στις αρχές του 17ου αιώνα, χρησιμοποιώντας το θεωρητικό πλαίσιο που προσφέρουν οι Benedict Anderson και Homi Κ. Bhabha (το έθνος ως αφήγηση, ως το φανταστικό και ιστορικά απρόοπτο προσχέδιο της ανθρώπινης κοινωνίας) για να γίνει μια ανάγνωση των πραγματειών των Wilson, Puttenham κ.α. λαμβάνοντας υπόψη τη συνεισφορά τους στη γραφή της Αγγλίας. Ενώ η έννοια της εθνικότητας συχνά θεωρείται δεδομένη ως σημαντικός παράγοντας στην πρώιμη σύγχρονη γραφή, η φύση και τα πραγματικά αποτελέσματα της επίδρασής της σπάνια αναλύονται. Αναλύεται εδώ πώς ο εθνικός λόγος λειτουργεί και ως βαθύτερη δομή των κειμένων και ως το σημείο εκμηδενίσεως στα κειμένα, ως ο λόγος που οι συγγραφείς πρέπει να φαντάζονται έτσι ώστε οι πραγματείες τους να έχουν κάποιο νόημα μέσα στο συγκεκριμένο ιστορικό τους πλαίσιο. Στα 1553, ο Wilson αναζητά ένα εθνικό κοινό ως παραλήπτη του έργου του Αrte οf Rhetorique (Τέχνη της Ρητορικής), ένα κοινό που δεν υπάρχει ακόμα. Πενήντα χρόνια αργότερα, ο Daniel, στο Defence of Ryme (Υπεράσπιση της Ομοιοκαταληξίας), σαφώς συνδέει κάτι που φαίνεται να είναι καθαρά λογοτεχνικό πρόβλημα με εθνικούς προβληματισμούς. Εν τω μεταξύ, οι συζητήσεις γύρω από τη γλώσσα και τη λογοτεχνία αποτελούσαν σημαντικό στοιχείο του αγώνα για μια νέα πολιτισμική τάξη μέσα στις εθνικές οριοθετήσεις.
description: Gramma: Journal of Theory and Criticism, Vol 5 (1997): Text / History / Context
The shape of a small universe: signatures in the cosmic microwave background
Creators: name: Bowen, R.
name: Ferreira, P. G.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We consider the most general parametrization of flat topologically compact universes, complementing the work of Scannapieco, Levin and Silk to include non-trivial shapes. We find that modifications in shape of the fundamental domain will lead to distinct signatures in the anisotropy of the cosmic microwave radiation. We make a preliminary assessment of the effect on three statistics: the angular power spectrum, the distribution of identified ``circles'' on the surface of last scattering and the correlation function of antipodal points.
description: 5 pages, 3 figures, accepted for publication in Phys. Rev. D
title: Besondere Zulassungsordnung für den Studiengang Pharmazie an der Technischen Universität Braunschweig, Fakultät für Lebenswissenschaften
Creators: name: :None
Publisher: name: Technische Universität Braunschweig. Fakultät 2
Year: 2019
Subjects: subject: Zulassungsordnung
subject: 379

description: Hochschulöffentliche Bekanntmachungen der Technischen Universität Braunschweig, vol. 1283
Magnetic island merger as a mechanism for inverse magnetic energy transfer
Creators: name: Zhou, Muni
name: Bhat, Pallavi
name: Loureiro, Nuno F.
name: Uzdensky, Dmitri A.
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Magnetic energy transfer from small to large scales due to successive magnetic island coalescence is investigated. A solvable analytical model is introduced and shown to correctly capture the evolution of the main quantities of interest, as borne out by numerical simulations. Magnetic reconnection is identified as the key mechanism enabling the inverse transfer, and setting its properties: magnetic energy decays as $\tilde t^{-1}$, where $\tilde t$ is time normalized to the (appropriately defined) reconnection timescale; and the correlation length of the field grows as $\tilde t^{1/2}$. The magnetic energy spectrum is self-similar, and evolves as $\propto \tilde t ^{-3/2}k^{-2}$, where the $k$-dependence is imparted by the formation of thin current sheets.
description: 6 pages, 5 figures, submitted for publication
Absolute dilations of ucp self-adjoint Fourier multipliers: the non unimodular case
Creators: name: Duquet, Charles
name: Merdy, Christian Le
Publisher: name: arXiv
Year: 2024
Subjects: subject: Operator Algebras (math.OA)
subject: FOS: Mathematics
subject: 47A20, 46L51, 43A22

description: Let $φ$ be a normal semi-finite faithful weight on a von Neumann algebra $A$,let $(σ^φ_r)_{r\in{\mathbb R}}$ denote the modular automorphism group of $φ$, and let $T\colon A\to A$ be a linear map. We say that $T$ admits an absolute dilation if there exist another von Neumann algebra $M$ equipped with a normal semi-finite faithful weight $ψ$, a $w^*$-continuous, unital and weight-preserving $*$-homomorphism $J\colon A\to M$ such that $σ^ψ\circ J=J\circ σ^φ$, as well as a weight-preserving $*$-automorphism $U\colon M\to M$ such that $T^k={\mathbb E}_JU^kJ$ for all integer $k\geq 0$, where ${\mathbb E}_J\colon M\to A$ is the conditional expectation associated with $J$. Given any locally compact group $G$ and any real valued function $u\in C_b(G)$, we prove that if $u$ induces a unital completely positive Fourier multiplier $M_u\colon VN(G) \to VN(G)$, then $M_u$ admits an absolute dilation. Here $VN(G)$ is equiped with its Plangherel weight $φ_G$. This result had been settled by the first named author in the case when $G$ is unimodular so the salient point in this paper is that $G$ may be non unimodular, and hence $φ_G$ may not be a trace. The absolute dilation of $M_u$ implies that for any $1
description: Revised version, to appear in Glasgow Journal of Mathematics
Factors of composite $4n^2 +1$ using Fermat's factorization method
Creators: name: Longhas, Paul Ryan
name: Abdul, Alsafat
name: Rosal, Aurea
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Mathematics (math.GM)
subject: FOS: Mathematics
subject: 11A07

description: In this article, we factor the composite $4n^2 +1$ using Fermat's factorization method. Consequently, we characterized all proper factors of composite $4n^2 +1$ in terms of its form. Furthermore, the composite Fermat's number is considered in this study.
description: 8 pages, article
Perturbations in inflationary cosmologies with smooth exit
Creators: name: Tilley, Daniel
name: Maartens, Roy
Publisher: name: arXiv
Year: 1998
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We give a comprehensive analysis of how scalar and tensor perturbations evolve in cosmologies with a smooth transition from power-law-like and de Sitter-like inflation to a radiation era. Analytic forms for the super-horizon and sub-horizon perturbations in the inflationary and radiation dominated eras are found.
description: 11 pages, latex, Accepted for publication in JMP
ZTF SN Ia DR2: Evidence of Changing Dust Distributions With Redshift Using Type Ia Supernovae
Creators: name: Popovic, B.
name: Rigault, M.
name: Smith, M.
name: Ginolin, M.
name: Goobar, A.
name: Kenworthy, W. D.
name: Ganot, C.
name: Ruppin, F.
name: Dimitriadis, G.
name: Johansson, J.
name: Amenouche, M.
name: Aubert, M.
name: Barjou-Delayre, C.
name: Burgaz, U.
name: Carreres, B.
name: Feinstein, F.
name: Fouchez, D.
name: Galbany, L.
name: de Jaeger, T.
name: Kim, Y. -L.
name: Lacroix, L.
name: Nugent, P. E.
name: Racine, B.
name: Rosselli, D.
name: Rosnet, P.
name: Sollerman, J.
name: Hale, D.
name: Laher, R.
name: Müller-Bravo, T. E.
name: Reed, R.
name: Rusholme, B.
name: Terwel, J.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Type Ia supernova (SNIa) are excellent probes of local distance, and the increasing sample sizes of SNIa have driven an increased need to study the associated systematic uncertainties and improve the standardisation methods in preparation for the next generation of cosmological surveys into the dark energy equation-of-state $w$. We aim to probe the potential change in the SNIa standardisation parameter $c$ with redshift and the host-galaxy of the supernova. Improving the standardisation of SNIa brightnesses will require accounting for the relationship between the host and the SNIa, and potential shifts in the SNIa standardisation parameters with redshift will cause biases in the recovered cosmology. Here, we assemble a volume-limited sample of ~3000 likely SNIa across a redshift range of $z = 0.015$ to $z = 0.36$. This sample is fitted with changing mass and redshift bins to determine the relationship between intrinsic properties of SNe Ia and their redshift and host galaxy parameters. We then investigate the colour-luminosity parameter $β$ as a further test of the SNIa standardisation process. We find that the changing colour distribution of SNe Ia with redshift is driven by dust at a confidence of $>4σ$. Additionally, we show a strong correlation between the host galaxy mass and the colour-luminosity coefficient $β$ ($> 4σ$), even when accounting for the quantity of dust in a host galaxy.
Forecasting confined spatiotemporal chaos with genetic algorithms
Creators: name: Lopez, Cristobal
name: Alvarez, Alberto
name: Hernandez-Garcia, Emilio
Publisher: name: arXiv
Year: 2000
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: A technique to forecast spatiotemporal time series is presented. it uses a Proper Ortogonal or Karhunen-Loève Decomposition to encode large spatiotemporal data sets in a few time-series, and Genetic Algorithms to efficiently extract dynamical rules from the data. The method works very well for confined systems displaying spatiotemporal chaos, as exemplified here by forecasting the evolution of the onedimensional complex Ginzburg-Landau equation in a finite domain.
description: 4 pages, 5 figures
You Can't Make Science Open Without Committing to PIDs
Creators: name: Cheng, Chieh-Chih Estelle
name: Edmunds, Rorie
Publisher: name: Zenodo
Year: 2023
Subjects: ORCID
DataCite
Persistent Identifier (PID)
Metadata
Communities
DSWS-2023

description: The FAIR Principles describe how research outputs, both physical and digital, should be findable, accessible, interoperable, and reusable. These concepts go hand-in-hand with ensuring the research endeavour is trustworthy and transparent under Open and Global Research Infrastructure.

But, what can organizations and individuals do to ensure their research outputs are FAIR and Open? What methods, tools, and infrastructures are available to help them? What guidance exists for them to follow?

With a focus on initiatives in the Asia–Oceania region, this session will present practice papers highlighting current trends for implementing Openness and FAIRness from perspectives such as FAIR-enabling frameworks and infrastructure, Open Science policy, and technologies that support multidisciplinary use of research outputs. Significant time will be devoted to discussion among (in-person and virtual) speakers and participants.
description: DataCite and ORCID are global communities with a shared mission to ensure that the outputs of research can be discovered, accessed, and repurposed, and that the people who contribute to such outputs are correctly acknowledged for their work. They strive to build transparent and trustworthy linkages among researchers, resources, and organizations. DataCite and ORCID are thus helping to advance knowledge by connecting research and researchers.

Both communities enable the creation and application of globally unique and persistent identifiers (PIDs), as well as integrating services to improve research workflows. Digital Object Identifiers (DOIs) registered under DataCite services can be applied to many types of research outputs coming from any discipline. ORCID iDs enable researchers to connect themselves to their contributions and affiliations as they engage in research, scholarship, and innovation activities.

PIDs, and the metadata that underpin them, are vital components of making Open Science and the FAIR Data Principles a reality. When registering a DOI or ORCID iD, one supplies a PID metadata record under a CC0 licence, as well as more in-depth, structural information about the output or person—via a permanently resolvable URI—in a findable and accessible digital location (i.e., a landing page or an ORCID record). The provision of such rich metadata enhances the interoperability and reusability of an output associated with a uniquely identified individual, as well as facilitating crosslinking and citation.

This presentation will update the community on strategic initiatives and services led and offered by DataCite and ORCID that assist the Openness and FAIRness of entities in the research ecosystem by increasing trust, diversity, and attribution and credit.
The Importance of Sincerity: Gerasimos Vokos and the Position of the Intellectual in Early-Twentieth-Century Athens
Creators: name: Yoka, Lia
Publisher: name: Gramma: Journal of Theory and Criticism
Year: 1997

description: Υπάρχουν ακόμα δεσμοί που μένουν να διαλευκανθούν μεταξύ των μακροχρόνιων πολιτισμικών εξελίξεων και των στιγμών ατομικής παραγωγής, μεταξύ των κοινωνικών παικτών και του περιβάλλοντός τους και, τέλος, μεταξύ των εξελικτικών φάσεων σε διαφορετικά μέσα και τεχνολογίες έκφρασης στη σύγχρονη εποχή. Το άρθρο επιχειρεί να συνεισφέρει σε αυτό το πολύπλευρο έργο μέσω μιας μελέτης της ζωής και της σταδιοδρομίας του Γεράσιμου Βώκου, ενός Αθηναίου δημοσιογράφου, ποιητή και θεατρικού συγγραφέα των αρχών του εικοστού αιώνα, που πέρασε τα τελευταία χρόνια της ζωής του ως ζωγράφος στο Παρίσι. Σε μια αντιπαραβολή αυστηρά βιογραφικών στοιχείων και γεγονότων ενός ευρύτερου πεδίου και μέσω της ανάλυσης ενός σχεδίου του Βώκου και του πλαισίου δημοσίευσής του, προτείνω κάποιες προκαταρκτικές σκέψεις για την ιστορική σημασία, στο συγκεκριμένο αυτό ιστορικό πλαίσιο, της απόφασης του Βώκου να γίνει ζωγράφος στην ηλικία των σαράντα πέντε ετών.
description: Gramma: Journal of Theory and Criticism, Vol 5 (1997): Text / History / Context
À propos des Asilides (Diptera, Asilidae) de la Réserve naturelle nationale de la tourbière de Machais (France, Grand Est, Vosges)
Creators: name: Langlois, Dominique
Publisher: name: SHNEC [Société d'Histoire Naturelle et d'Ethnographie de Colmar]
Year: 2025
Subjects: subject: Entomology

description: Abstract  ̶  Malaise traps installed in 2020 and 2021 in the tourbière de Machais National Nature Reserve made it possible to study the Asilidae. Thirteen species were identified from the 134 specimens examined. Among them, Cyrtopogon lateralis (Fallén, 1814) and Tolmerus pyragra (Zeller, 1840) are poorly documented in France.
Exoplanets in reflected starlight with dual-field interferometry: A case for shorter wavelengths and a fifth Unit Telescope at VLTI/Paranal
Creators: name: Lacour, S.
name: Carrión-González, Ó.
name: Nowak, M.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The direct observation of cold and temperate planets within 1 to 10 AU would be extremely valuable for uncovering their atmospheric compositions but remains a formidable challenge with current astronomical methods. Ground-based optical interferometry, capable of high angular-resolution imaging, offers a promising avenue for studying these exoplanets, complementing space-based observations. Our objective is to explore the fundamental limits of dual-field interferometry and assess its potential for characterizing exoplanets in reflected light using the Very Large Telescope Interferometer (VLTI). We developed analytical expressions to describe the performance of dual-field interferometry and integrated these with simulations of atmospheric wavefronts corrected by extreme Adaptive Optics. An analytical solution for optimal phase apodization was formulated to enhance starlight rejection when injected into a single-mode fibre. This framework was applied to determine the detectability of known exoplanets in reflected light across various wavelength bands for both the current VLTI and a proposed extended version. Our results indicate that employing shorter wavelengths improves detectability, enabling at least seven Jupiter-mass exoplanets to be observed in the J band with current VLTI's baselines. Adding new baselines with lengths beyond 200 meters significantly enhances VLTI's capabilities, increasing the number of detectable exoplanets and revealing potential habitable zone candidates such as $τ$ Ceti e and Proxima Centauri b. To substantially improve the VLTI's exoplanet characterization capabilities, we recommend developing instrumentation at wavelengths shorter than 1$\,μ$m, as well as the addition of a fifth Unit Telescope (UT5).
description: Accepted by A&A. 16 pages plus appendix
title: Ordnung zur Registrierung Studentischer Vereinigungen der Technischen Universität Braunschweig
Creators: name: :None
Publisher: name: Technische Universität Braunschweig, GB 1/Abt. 11
Year: 2019
Subjects: subject: Ordnung
subject: 379

description: Hochschulöffentliche Bekanntmachungen der Technischen Universität Braunschweig, vol. 1259 a
Fast diffusion of a Lennard-Jones cluster on a crystalline surface
Creators: name: Deltour, Pierre
name: Barrat, Jean-Louis
name: Jensen, Pablo
Publisher: name: arXiv
Year: 1997
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present a Molecular Dynamics study of large Lennard-Jones clusters evolving on a crystalline surface. The static and the dynamic properties of the cluster are described. We find that large clusters can diffuse rapidly, as experimentally observed. The role of the mismatch between the lattice parameters of the cluster and the substrate is emphasized to explain the diffusion of the cluster. This diffusion can be described as a Brownian motion induced by the vibrationnal coupling to the substrate, a mechanism that has not been previously considered for cluster diffusion.
description: latex, 5 pages with figures
Soliton oscillations in the Zakharov-type system at arbitrary nonlinearity-dispersion ratio
Creators: name: Blyakhman, L. G.
name: Gromov, E. M.
name: Malomed, B. A.
name: Tyutin, V. V.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: The dynamics of two-component solitons with a small spatial displacement of the high-frequency (HF) component relative to the low-frequency (LF) one is investigated in the framework of the Zakharov-type system. In this system, the evolution of the HF field is governed by a linear Schrödinger equation with the potential generated by the LF field, while the LF field is governed by a Korteweg-de Vries (KdV) equation with an arbitrary dispersion-nonlinearity ratio and a quadratic term accounting for the HF feedback on the LF field. The oscillation frequency of the soliton's HF component relative to the LF one is found analytically. It is shown that the solitons are stable against small perturbations. The analytical results are confirmed by numerical simulations.
description: to be published in Chaos, Solitons & Fractals
Hardy spaces and Riesz transforms on a Lie group of exponential growth
Creators: name: Sjögren, Peter
name: Vallarino, Maria
Publisher: name: arXiv
Year: 2024
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: Let $G$ be the Lie group ${\Bbb{R}}^2\rtimes {\Bbb{R}}^+$ endowed with the Riemannian symmetric space structure. Take a distinguished basis $X_0,\, X_1,\,X_2$ of left-invariant vector fields of the Lie algebra of $G$, and consider the Laplacian $Δ=-\sum_{i=0}^2X_i^2$ and the first-order Riesz transforms $\mathcal R_i=X_iΔ^{-1/2}$, \hskip3pt $i=0,1,2$. We first show that the atomic Hardy space $H^1$ in $G$ introduced by the authors in a previous paper does not admit a characterization in terms of the Riesz transforms $\mathcal R_i$. It is also proved that two of these Riesz transforms are bounded from $H^1$ to $H^1$.
description: 25 pages
Emergent spinon-holon Feshbach resonance in a doped Majumdar-Ghosh model
Creators: name: Linsel, Simon M.
name: Schollwöck, Ulrich
name: Bohrdt, Annabelle
name: Grusdt, Fabian
Publisher: name: arXiv
Year: 2024
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Superconductivity (cond-mat.supr-con)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Experimental and numerical spectroscopy have revealed rich physics in antiferromagnets, in particular in frustrated and doped systems. The Majumdar-Ghosh (MG) model has an analytically known spin-disordered ground state of dimerized singlets as a result of magnetic frustration. Here we study the single-hole angle-resolved photoemission spectrum (ARPES) of a doped MG model, where we introduce a spin-hole interaction that is experimentally accessible with ultracold molecules. We report a bound spinon-holon ground state and clear signatures of a spinon-holon molecule state and polarons in the ARPES spectrum at different magnetizations. Moreover, we find signatures of an emergent Feshbach resonance with tunable interactions associated with the unbinding of the spinon and the holon. Our results provide new insights into the physics of dopants in frustrated $t$-$J$ models and establish the latter as a new platform for studies of emergent few-body phenomena.
description: 6+3 pages, 4+2 figures