cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Enhancing the Structural Performance of Additively Manufactured Objects
Creators: name: Erva  Ulu
Publisher: name: Carnegie Mellon University
Year: 2018
Subjects: subject: Mechanical Engineering
subject: FOS: Mechanical engineering

description: The ability to accurately quantify the performance an additively manufactured (AM) product is important for a widespread industry adoption of AM as the design is required to: (1) satisfy geometrical constraints, (2) satisfy structural constraints dictated by its intended function, and (3) be cost effective compared to traditional manufacturing methods. Optimization techniques offer design aids in creating cost-effective structures that meet the prescribed structural objectives. The fundamental problem in existing approaches lies in the difficulty to quantify the structural performance as each unique design leads to a new set of analyses to determine the structural robustness and such analyses can be very costly due to the complexity of in-use forces experienced by the structure. This work develops computationally tractable methods tailored to maximize the structural performance of AM products. A geometry preserving build orientation optimization method as well as data-driven shape optimization approaches to structural design are presented. Proposed methods greatly enhance the value of AM technology by taking advantage of the design space enabled by it for a broad class of problems involving complex in-use loads.
Construction of a local barK N-pi Sigma-pi Lambda potential and composition of the Lambda(1405)
Creators: name: Miyahara, Kenta
name: Hyodo, Tetsuo
name: Weise, Wolfram
Publisher: name: arXiv
Year: 2018
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A Kbar N-pi Sigma-pi Lambda coupled-channel potential is constructed on the basis of chiral SU(3) dynamics. Several matching conditions are introduced to formulate an equivalent local potential that reproduces the coupled-channel scattering amplitudes resulting from chiral SU(3)_L times SU(3)_R meson-baryon effective field theory. In contrast to a previously constructed effective single-channel Kbar N potential, the explicit treatment of the pi Sigma channel yields a natural description of the low-mass pole as part of the two-pole structure of the Lambda(1405) resonance. The energy dependence of the potential can now be parametrized with a minimum of polynomial orders. To study the properties of the Lambda(1405) as a quantum-mechanical quasibound state, we derive the normalization condition of its wave function generated by the energy-dependent coupled-channel potential, using the Feshbach projection method. This framework provides an improved understanding of this system from the viewpoint of the compositeness of hadrons. With the properly normalized wave function, we demonstrate and confirm that the high-mass pole of the Lambda(1405) is dominated by the Kbar N component.
description: 22 pages, 9 figures, published version
Enhanced Digital Design Exploration and Recovery through 3D Wireframe Assistance
Creators: name: Arisoy, Erhan Batuhan
Publisher: name: Carnegie Mellon University
Year: 2015
Subjects: subject: Mechanical Engineering
subject: FOS: Mechanical engineering

description: Almost seventy percent of final product forms are determined at conceptual shape modeling and exploration stages which involve generation of a rich set of geometric proxies with the assistance of various computer-aided design (CAD) and engineering (CAE) tools [1]. This practice facilitates existing computational tools in congruent with visual and physical references such as rough sketches, 2D line drawings, prototypes or 3D wireframe drawings. Although these initial proxies can be ample to capture the intended forms with sufficient accuracy, design practice is impeded by current CAD tools as they require careful and laborious dictation and control of the geometric data for digital content generation and recovery. The root cause is lack of computational support for utilization of design content from primitive proxies that moves designers’ focus from aesthetic shape ideation to laborious digital model construction or modification. In this research, we propose new computational tools to remedy technical challenges that prevent utilization of geometric content from primitive proxies in construction or recovery of approximate geometrical models for rapid exploration and reverse engineering purposes. The overarching objective of this Ph.D. research is identification and utilization of geometric design content that is common among alternative form candidates in a conceptual design activity. If this can be achieved, novel computational tools that will enable rapid generation and modifications of digital forms by alleviating redundant and laborious work flows required by existing CAD tools can be developed. To achieve this objective we identified three main technical goals: (1) rapid conversion of design information contained in primitive shape proxies without any topological or geometric constraints into a digital data that is suitable for further beatification and refinement using conventional CAD tools, (2) an automatic computational tool for deformation transfer from physical prototypes to expedite digital shape exploration and design recovery from physical prototypes (3) sketch-based computational techniques that allow rapid topology insertions and modifications to provide effortless transitions between physical and digital media for final product form quest.
Advanced Deformation Analysis of Steel-Concrete Composite T Beam Sections
Creators: name: V. Preetha
name: V. Senthilkumar
name: K. Kalaivani
name: S. Navaneetha
Publisher: name: Zenodo
Year: 2021
Subjects: Composite structure
finite element analysis
deformation
energy

description: Because of their high specific strength, structural rigidity, and light weight, composite constructions are widely employed. A composite beam is made up of a concrete slab on top and a steel beam with an I-shaped cross section underneath it. Using finite element analysis, a three-dimensional composite beam is modelled to investigate the change in thickness of concrete slab and steel section exposed to evenly distributed load. The structure's support conditions are depicted as fixed beams on both ends. With steel I section beams, a relative research is proposed on three different concrete slab thicknesses of 80, 100, and 120 mm. In the composite T beam at midspan, total deformation, maximum primary stress, shear stress, normal elastic strain, and strain energy are presented. It also attempts to defend that longitudinal compressive stresses in concrete slabs do have non-uniform distribution of stresses over the cross section, leading to positive bending moments. To guarantee that concrete components behave compositely, shear stress across the sections must be evaluated. The numerical model of composite sections for various types of structural components is primarily motivated by their benefit in terms of construction time and cost savings.
On Fermion Zero-Modes in Instanton $V-A$ Models With Spontaneous Symmetry Breaking
Creators: name: Saririan, Kamran
Publisher: name: arXiv
Year: 1993
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The left and right handed fermion zero-modes are examined. Their behaviour under the variation of the size of the instanton, $\ri$, and the size of the Higgs core, $\rh$, for a range of Yukawa couplings corresponding to the fermion masses in the electroweak theory are studied. It is shown that the characteristic radii of the zero-modes, in particlar those the left handed fermions, are locked to the instanton size, and are not affected by the variation of $\rh$, except for fermion masses much larger than those in the standard electroweak theory.
description: 8 Pages. LaTeX file. 4 Figures Not included
Locally supersymmetric D=3 non-linear sigma models
Creators: name: de Wit, B.
name: Tollsten, A. K.
name: Nicolai, H.
Publisher: name: arXiv
Year: 1992
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study non-linear sigma models with N local supersymmetries in three space-time dimensions. For N=1 and 2 the target space of these models is Riemannian or Kahler, respectively. All N>2 theories are associated with Einstein spaces. For N=3 the target space is quaternionic, while for N=4 it generally decomposes into two separate quaternionic spaces, associated with inequivalent supermultiplets. For N=5,6,8 there is a unique (symmetric) space for any given number of supermultiplets. Beyond that there are only theories based on a single supermultiplet for N=9,10,12 and 16, associated with coset spaces with the exceptional isometry groups $F_{4(-20)}$, $E_{6(-14)}$, $E_{7(-5)}$ and $E_{16(+8)}$, respectively. For $N=3$ and $N\geq5$ the $D=2$ theories obtained by dimensional reduction are two-loop finite.
description: 35 pages plain tex, CERN-TH.6612/92 THU-92-18
Dark matter-wave solitons in the dimensionality crossover
Creators: name: Theocharis, G.
name: Kevrekidis, P. G.
name: Oberthaler, M. K.
name: Frantzeskakis, D. J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We consider the statics and dynamics of dark matter-wave solitons in the dimensionality crossover regime from 3D to 1D. There, using the nonpolynomial Schrödinger mean-field model, we find that the anomalous mode of the Bogoliubov spectrum has an eigenfrequency which coincides with the soliton oscillation frequency obtained by the 3D Gross-Pitaevskii model. We show that substantial deviations (of order of 10% or more) from the characteristic frequency $ω_{z}/\sqrt{2}$ ($ω_{z}$ being the longitudinal trap frequency) are possible even in the purely 1D regime.
description: Phys. Rev. A, in press
Controllable Non-Markovianity for a Spin Qubit in Diamond
Creators: name: Haase, Jan F.
name: Vetter, Philipp J.
name: Unden, Thomas
name: Smirne, Andrea
name: Rosskopf, Joachim
name: Naydenov, Boris
name: Stacey, Alastair
name: Jelezko, Fedor
name: Plenio, Martin B.
name: Huelga, Susana F.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a flexible scheme to realize non-artificial non-Markovian dynamics of an electronic spin qubit, using a nitrogen-vacancy center in diamond where the inherent nitrogen spin serves as a regulator of the dynamics. By changing the population of the nitrogen spin, we show that we can smoothly tune the non-Markovianity of the electron spin's dynamic. Furthermore, we examine the decoherence dynamics induced by the spin bath to exclude other sources of non-Markovianity. The amount of collected measurement data is kept at a minimum by employing Bayesian data analysis. This allows for a precise quantification of the parameters involved in the description of the dynamics and a prediction of so far unobserved data points.
description: 12 pages, 9 figure, including supplemental material
Effective Lagrangian for $b \rightarrow s$ Processes with QCD-Corrections
Creators: name: Adel, K.
name: Yao, York-Peng
Publisher: name: arXiv
Year: 1993
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a complete calculation of the effective lagrangian for $b \rightarrow s$ processes with $QCD$ corrections, in the leading logarithm approximation, for the cases $m_t=m_w$ and $m_t \gg m_w$. The effective lagrangian is then applied to estimate the $b \rightarrow s γ$ decay rate. We find that it is enhanced by a factor of 6 for the case $m_t=m_w$, and a factor of about 2 for $m_t \gg m_w$. Our results differ from those found in the literature, but are not very different numerically for $m_t=m_w$.
description: 15 pages, UM-TH-92-32 TeX, 1 figure (postscript) available upon request
A Class of Soliton Solutions for the N=2 Super mKdV/Sinh-Gordon Hierarchy
Creators: name: Aratyn, H.
name: Gomes, J. F.
name: Ymai, L. H.
name: Zimerman, A. H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Employing the Hirota's method, a class of soliton solutions for the N=2 super mKdV equations is proposed in terms of a single Grassmann parameter. Such solutions are shown to satisfy two copies of N=1 supersymmetric mKdV equations connected by nontrivial algebraic identities. Using the super Miura transformation, we obtain solutions of the N=2 super KdV equations. These are shown to generalize solutions derived previously. By using the mKdV/sinh-Gordon hierarchy properties we generate the solutions of the N=2 super sinh-Gordon as well.
description: 8 pages
Road Segmentation in SAR Satellite Images with Deep Fully-Convolutional Neural Networks
Creators: name: Henry, Corentin
name: Azimi, Seyed Majid
name: Merkle, Nina
Publisher: name: arXiv
Year: 2018
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Remote sensing is extensively used in cartography. As transportation networks grow and change, extracting roads automatically from satellite images is crucial to keep maps up-to-date. Synthetic Aperture Radar satellites can provide high resolution topographical maps. However roads are difficult to identify in these data as they look visually similar to targets such as rivers and railways. Most road extraction methods on Synthetic Aperture Radar images still rely on a prior segmentation performed by classical computer vision algorithms. Few works study the potential of deep learning techniques, despite their successful applications to optical imagery. This letter presents an evaluation of Fully-Convolutional Neural Networks for road segmentation in SAR images. We study the relative performance of early and state-of-the-art networks after carefully enhancing their sensitivity towards thin objects by adding spatial tolerance rules. Our models shows promising results, successfully extracting most of the roads in our test dataset. This shows that, although Fully-Convolutional Neural Networks natively lack efficiency for road segmentation, they are capable of good results if properly tuned. As the segmentation quality does not scale well with the increasing depth of the networks, the design of specialized architectures for roads extraction should yield better performances.
description: 5 pages, accepted for publication in IEEE Geoscience and Remote Sensing Letters
Two worlds meet: customising a general purpose repository for the specific needs of Life Sciences to achieve FAIRness for research data
Creators: name: Miksa, Tomasz
name: Rauber, Andreas
name: Ecker, Gerhard F.
name: Herbauts, Isabelle
name: Bakos, Asztrik
name: Digles, Daniela
name: Viereck, Michael
name: Ganguly, Raman
Publisher: name: Zenodo
Year: 2019
Subjects: data repository
life sciences
customisation
Fedora
FAIR principles

description: The existing digital ecosystem surrounding scholarly data publication is not yet addressing all requirements of life sciences. Although for certain types of digital objects there are already well established repositories, a considerable part of the research data from life science never become accessible to the open world due to a lack of appropriate tools for their continuous use and preservation. Here, we describe how we adapted an existing general purpose repository at the University of Vienna to the domain specific needs of life sciences. We complemented the existing functionality of the repository with extended metadata scheme and user interface to support the needs of and methodologies used in life science, without affecting the usability of the main repository. We thus evaded setting up a new system, which, in turn, allowed us to reduce required effort and minimise future maintenance costs. The larger vision is to create a repository that can be used across both the humanities and life sciences, which will not only be used as a system for digital preservation but equally well as a platform to facilitate research by aiming to meet the FAIR data principles (Findable, Accessible, Interoperable, and Reusable).
Keggin-type polyoxometalate-based supramolecular complex for selective oxidation of styrene to benzaldehyde
Creators: name: Cui, Wen-Jing
name: Zhao, Qing
name: Zhu, Hao-Tian
name: Hu, Na
name: Ma, Yuan-Yuan
name: Han, Zhan-Gang
name: Li, Yang-Guang
Publisher: name: Taylor & Francis
Year: 2020
Subjects: Biochemistry
Space Science
Medicine
Biological Sciences not elsewhere classified

description: A Keggin-type polyoxometalate (POM)-based supramolecular complex with the formula of [Co(H2O)3]2(ttb)2[HBW12O40]·2H2O (1) (ttb = 1,3,5-tri(1,2,4-triazol-1-ylmethyl)-2,4,6-trimethylbenzene) was synthesized via hydrothermal method and characterized by single-crystal X-ray diffraction, IR and powder X-ray diffraction analyses. In 1, [Co(H2O)3]2+ cations are connected with the adjacent ttb ligands to form a porous two-dimensional (2-D) cationic layered network, and the [HBW12O40]4− polyoxoanions are encapsulated between the layers through intermolecular interactions, generating a POM-capsulated 3-D supramolecular network. Integrating the advantage of Co2+ with [HBW12O40]4−, 1 as a heterogeneous catalyst displays a synergistically improved catalytic performance for oxidation of styrene. It can achieve almost 98% conversion of styrene in 4 h with about 99% selectivity of benzaldehyde product, which is about five times more than the catalytic activities of the single components (Co(OAc)2·4H2O or K5BW12O40). A series of comparative analyses showed that the high catalytic performance of 1 is mainly attributed to the synergistic effect of unsaturated metal sites and polyoxoanions. This work provides an approach for developing highly efficient POM-based heterogeneous catalysts toward the selective oxidation of styrene.
Comparison of bar strengths in optical and near-infrared for the OSUBSGS sample
Creators: name: Speltincx, T.
name: Laurikainen, E.
name: Salo, H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We use a gravitational bar torque method to compare bar strengths (the maximum tangential force normalized by radial force) in B and H-band images of 152 galaxies from the Ohio State University Bright Spiral Galaxy Survey. Our main motivation is to check how much the difference in the rest-frame wavelength could affect comparisons of bar strengths in low and high redshift observations. Between these two bands we find an average bar strength ratio Q_B/H= 1.25 which factor is nearly independent of the morphological type. We show that Q_B/H > 1 is mostly due to reduced bulge dilution of radial forces in the B-band. The bar torque method needs an estimate for the vertical scale height of the galaxy, based on the radial scale length of the disk and the galaxy's morphological type. Since these two might not always be possible to determine at high redshifts in a reliable manner, we also checked that similar results are obtained with vertical scale heights estimated from the radii corresponding to the K-band surface brightness of 20 mag/arcsec^2. Also, we made a simple test of the usability of the bar torque method at high redshifts by checking the effects of image degradation (nearest neighbour sampling without any adjustment of noise levels): we found that the estimated bar strengths varied by +/- 10% at most as long as the total extent of the bar was at least 10 pixels. Overall, we show that the gravitational bar torque method should provide a proficient tool for quantifying bar strengths also at high redshifts.
description: 15 pages, 9 figures, 1 table, accepted to MNRAS
Engineering siRNA Lipid Nanoparticles for the Treatment of Mantle Cell Lymphoma
Creators: name: Knapp, Christopher M.
Publisher: name: Carnegie Mellon University
Year: 2017
Subjects: subject: 90499 Chemical Engineering not elsewhere classified
subject: FOS: Chemical engineering

description: Mantle cell lymphoma (MCL) is an extremely difficult to treat subtype of non-Hodgkin lymphoma (NHL) with a low patient survival rate compared to most common cancers. Recently, nanoparticle delivery systems have received a great deal of interest for treating NHL. One of the more promising cargo options for these systems is short interfering RNA (siRNA). siRNA is a 18-23 nucleotide long double stranded RNA that is used to inhibit the protein expression of target mRNAs in a sequence specific manner. MCLs have several commonly overexpressed genes compared to normal cells making it an ideal candidate for siRNA therapies. For RNA interference to occur, A delivery vehicle is needed for the siRNA to reach the cytoplasm of the cell. In this thesis, ionizable lipid-like materials termed lipidoids are formulated into lipid nanoparticles (LNPs) to deliver siRNA. A new library of lipidoids is constructed to gain a better understanding of how the lipidoid tail-structure affects the silencing ability of LNPs. A novel tail precursor is identified as conferring potency to LNPs. Then, LNPs are used to silence genes within difficult to transfect MCL cells. LNPs targeting the anti-apoptotic protein Mcl-1 exhibit potent gene silencing and cause an increase in the fraction of cells undergoing apoptosis. This is important because there is no therapeutic that is FDA approved that targets this commonly overexpressed protein. Because of this LNP’s potency, siRNAs targeting multiple genes can be encapsulated into LNPs without causing unwanted toxicity. LNPs targeting several genes in multiple pathways cause a larger fraction of MCL cells to undergo apoptosis compared to cells treated with LNPs targeting only one gene. A major issue in cancer therapeutics is that the majority of nanoparticles accumulate in the liver. In an effort to improve the delivery of LNPs to target cells, changes to their formulations and administration methods are investigated as a means to improve LNP circulation time, biodistribution, and silencing ability. Overall, this work identifies lipidoid nanoparticles as potent siRNA delivery systems to treat MCL and investigates key properties for further improvement in LNP siRNA delivery to target cells.
Habitar la Salina : áreas de actividad asociadas con la producción de sal en la Salina de Zipaquirá
Creators: name: Cárdenas Romero, Juanita
Publisher: name: Universidad Externado de Colombia
Year: 2024
Subjects: subject: Geofísica - Investigación
subject: Salinas - Aspectos sociales
subject: Datos estadísticos
subject: Organización social
subject: Producción artesanal
subject: Salina de Zipaquirá
subject: Poder
subject: Producción de Sal

description: Este estudio se centra en la identificación de dinámicas espaciales intra-sitio en la ocupación humana de la Salina de Zipaquirá, asociada con la producción de sal. Para esto, se abordan conceptualizaciones de organización social y productiva, de espacio, y áreas de actividad. En ese sentido, se buscó identificar patrones de áreas de actividad asociados con la ocupación humana en dicha Salina, que se contrastaron con modelos de organización social y productiva propuestos para la zona. Así, la investigación se fundamentó en metodologías de reconocimiento arqueológico -recolección superficial y prospección geofísica (con georradar y magnetómetro)-, y en la aplicación del análisis de vecino más cercano en anomalías magnéticas. A partir de estas, se identificaron patrones de ocupación y agrupaciones de material cerámico relacionadas con actividades productivas, disposición de estructuras, posibles fogones, y una relación aleatoria en el análisis espacial de anomalías magnéticas. Los datos obtenidos se relacionaron con modelos de poder individual y producción independiente, a los que se proponen cuestionamientos por medio del contraste con evidencias identificadas en esta investigación y en estudios previos. Adicionalmente, se señalan las posibilidades teórico-metodológicas a futuro, así como algunas limitantes por considerar frente a la investigación en el sitio.
description: This thesis is centered on the identification of intra-site space dynamics during human occupation of Zipaquirá Salt Mine, which is associated with salt production. Therefore, conceptualizations of social and productive organization, space, and activity areas are approached. Consequently, it was intended to identify activity area patterns related to human occupation of the Salt Mine, which were contrasted with social and productive organization models proposed for the region. Thus, the study was based on archaeological survey methodologies -superficial collection and geophysical survey (through GPR and magnetometer)- and the use of the nearest neighbor analysis on magnetic anomalies. Through these, it was possible to identify occupation patterns and potsherd accumulations related to salt production, structure disposal, presumed fire pits, and a random relation between magnetic anomalies. Data obtained were related to individual power and independent production models, to which questionings are proposed via contrast with evidence identified in this study but also in previous studies. In addition, future theoretical-methodological possibilities are shown, as well as some limitations, to be considered against the investigation in the site.
Engineering Contractile 2D and 3D Human Skeletal and Cardiac Muscle Microtissues
Creators: name: Duffy, Rebecca Marie
Publisher: name: Carnegie Mellon University
Year: 2016
Subjects: subject: 90399 Biomedical Engineering not elsewhere classified
subject: FOS: Medical engineering

description: Skeletal and cardiac muscles are crucial biological actuators with limited capacity to repair themselves after significant trauma or disease states. Engineering these complex tissues using human derived cells has potential applications to serve as more physiologically relevant and economical test beds for regenerative medicine therapies compared to animal models and costly human trials. However, before we can engineer these tissues, we must first gain a better understanding of how the structure and composition of the extracellular matrix (ECM) influences differentiation and maturation into contractile muscle in vitro. To do this, we used traditional microcontact printing techniques to determine how ECM composition and line geometry influenced differentiating human skeletal muscle in 2D, and we incorporated these differentiating human myotubes into a muscular thin film (MTF) assay previously developed to measure 2D cardiomyocyte (CM) contractility. We also engineered contractile 3D cardiac microtissues with integrated force indicators (MIFIs) by seeding embryonic stem cell derived CMs and cardiac fibroblasts in biologically derived ECM hydrogels. From the 2D work, we found that human skeletal muscle derived cells had significantly higher myotube formation on laminin (LAM) lines, and C2C12 mouse myoblasts required more specific LAM line geometries than differentiating human skeletal muscle myoblasts to form uniaxially aligned myotubes. Additionally, we found that LAM with trace amounts of perlecan significantly increased human myotube formation compared to more purified LAM solutions. We also determined that 2D human skeletal muscle was limited to 1 week of differentiation before differentiating myoblasts delaminated from patterned polydimethylsiloxane. For the 3D engineered muscle constructs, we found that cardiac MIFIs could be maintained in culture for at least 2 weeks, exerted twitch forces ~1 - 7 μN and responded as expected to excitatory pharmacological stimuli. We developed the 3D MIFI assay using CMs with the intention of applying this platform to patient specific CMs from induced pluripotent stem cells as well as to differentiating skeletal muscle. The findings we have made by engineering contractile 2D human skeletal muscle and 3D human cardiac microtissues have future applications as patient specific regenerative therapy models, test beds for pharmaceutical therapies, building blocks for engineering functional muscle replacements, and as soft robotics actuators.
Linear b-Gauges for Open String Fields
Creators: name: Kiermaier, Michael
name: Sen, Ashoke
name: Zwiebach, Barton
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Motivated by Schnabl's gauge choice, we explore open string perturbation theory in gauges where a linear combination of antighost oscillators annihilates the string field. We find that in these linear b-gauges different gauge conditions are needed at different ghost numbers. We derive the full propagator and prove the formal properties which guarantee that the Feynman diagrams reproduce the correct on-shell amplitudes. We find that these properties can fail due to the need to regularize the propagator, and identify a large class of linear b-gauges for which they hold rigorously. In these gauges the propagator has a non-anomalous Schwinger representation and builds Riemann surfaces by adding strip-like domains. Projector-based gauges, like Schnabl's, are not in this class of gauges but we construct a family of regular linear b-gauges which interpolate between Siegel gauge and Schnabl gauge.
description: LaTeX file, 50 pages
Empirical evaluations of transformers
Creators: name: McGuire, Jack
Publisher: name: No Publisher Supplied
Year: 2023

description: The transformer architecture of neural networks immediately took over the machine learning world upon the release of the paper "Attention is All You Need" by a team at Google Brain in 2017. But, perhaps more importantly, the Summer and Fall 2022 releases of generative networks such as ChatGPT, Midjourney, and DALL-E 2 saw the technology make an immediate impact on millions of people unrelated to the academic circles that had been talking about transformers for several years, shaking up creative industries and introducing the technology to many people with widely varying understandings of how it works. Thus, we set out to evaluate temporal sequence models such as transformers; first, on a deeply technical level, investigating the role of one of transformers' unique contributions, positional encoding, on the overall training time and efficacy of the system. We then evaluated the system empirically in a broader sense as a tool that a common person would use, in order to quantitatively identify shortcomings and misconceptions on what the systems are and are not able to accomplish. Finally, we looked at another more established temporal sequence model in the form of reinforcement learning in order to understand hierarchical representation of such models and discuss the utility of hierarchical models of transformers in the future.
title: ADCO, Cartulaire de l'abbaye de Saint-Seine (XIIIe siècle), Cart. 165 (10 H 6, ms. 139), 354 pages, f. 0180
Creators: name: de la Côte d'Or, Archives départementales
name: Petot, Frédéric
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CG21/F.PETOT/2009
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris
subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge
subject: cartulaire

description: Cartulaire de l'abbaye de Saint-Seine (XIIIe siècle), Archives départementales de la Côte-d'Or, Cart. 165 (10 H 6, ms. 139), 354 pages, f. 0180, Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Cartulaire de l'abbaye de Saint-Seine (XIIIe siècle), Archives départementales de la Côte-d'Or, Cart. 165 (10 H 6, ms. 139), 354 pages, f. 0180, in Projet CBMA - Corpus Burgundiae Medii Aevi [Ressource en ligne], https:// manuscrits.cbma-project.eu/
description: Provenance: abbaye de Saint-Seine
description: Provenance: http://www.wikidata.org/entity/Q2820709
title: Cycle 2023-2024
Publisher: name: MSH SUD
Year: 2024

description: L’objectif général du séminaire permanent est de favoriser l’émergence de nouvelles problématiques de recherche à l’interface entre santé et environnement, en donnant des outils pour penser l’interdisciplinarité et pour réfléchir aux liens entre recherche et société.
D5.3 Implementation of a PAB incl. terms of reference, mandate and scope of the board
Creators: name: EU-PolarNet 2 Consortium
name: Jania, Jacek
Publisher: name: Zenodo
Year: 2021

description: EU-PolarNet 2 strives to provide policy advice in response to questions related to the Polar Regions from the European Commission and other decision makers at national and regional levels. To fulfil this objective, EU-PolarNet 2 establishes a Policy Advisory Board as point of contact for advice based on national expertise. The role of the Policy Advisory Board is to provide up-to-date, evidenced-based, explicit and implementable recommendations, advice or briefings on Polar-related questions on behalf of the whole European Polar community. This document contains the Terms of Reference (ToR) for the Policy Advisory Board.
Energy Storage on the Grid and the Short-term Variability of Wind
Creators: name: Hittinger, Eric Stephen
Publisher: name: Carnegie Mellon University
Year: 2012
Subjects: subject: Computer Engineering
subject: 90699 Electrical and Electronic Engineering not elsewhere classified
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Wind generation presents variability on every time scale, which must be accommodated by the electric grid. Limited quantities of wind power can be successfully integrated by the current generation and demand-side response mix but, as deployment of variable resources increases, the resulting variability becomes increasingly difficult and costly to mitigate. In Chapter 2, we model a co-located power generation/energy storage block composed of wind generation, a gas turbine, and fast-ramping energy storage. A scenario analysis identifies system configurations that can generate power with 30% of energy from wind, a variability of less than 0.5% of the desired power level, and an average cost around $70/MWh. While energy storage technologies have existed for decades, fast-ramping grid-level storage is still an immature industry and is experiencing relatively rapid improvements in performance and cost across a variety of technologies. Decreased capital cost, increased power capability, and increased efficiency all would improve the value of an energy storage technology and each has cost implications that vary by application, but there has not yet been an investigation of the marginal rate of technical substitution between storage properties. The analysis in chapter 3 uses engineering-economic models of four emerging fast-ramping energy storage technologies to determine which storage properties have the greatest effect on cost-of-service. We find that capital cost of storage is consistently important, and identify applications for which power/energy limitations are important. In some systems with a large amount of wind power, the costs of wind integration have become significant and market rules have been slowly changing in order to internalize or control the variability of wind generation. Chapter 4 examines several potential market strategies for mitigating the effects of wind variability and estimate the effect that each strategy would have on the operation and profitability of wind farms. We find that market scenarios using existing price signals to motivate wind to reduce variability allow wind generators to participate in variability reduction when the market conditions are favorable, and can reduce short-term (30-minute) fluctuations while having little effect on wind farm revenue.
MyCoRe - the repository software framework
Creators: name: Oeltjen, Wiebke
Publisher: name: Zenodo
Year: 2019
Subjects: MyCoRe
repository software
open source software

description: MyCoRe is an established repository software framework in the German-speaking region. The open source framework is able to serve as basis for digital libraries, multimedia archives, research data repositories or institutional repositories. The name, pronounced "my core", indicates that there is a software core that can be used in custom applications. More than 80 MyCoRe applications are running at over 20, mostly German locations. They provide publications, digital objects (such as documents, manuscripts, books, catalogs, journals, newspapers, etc.) and research data. All objects are described with metadata. Also image files, sound documents, and videos may be included in MyCoRe-based information systems. The MyCoRe framework provides the functionality necessary to manage, store, present, and share metadata and digital resources. Various interfaces are supported. Resource harvesting within the OAI-PMH framework is provided. The deposit of content is possible via SWORD protocol (v2). ORCID identifiers are integrated in MyCoRe repositories for author identification and automated data export to or import from ORCID is possible. The support of schema.org and JSON-LD is the newest software development. Examples of MyCoRe applications are "DuEPublico" with the university bibliography at the University of Duisburg-Essen, the publication server of the TU Braunschweig or the "Digital Library Thuringia (DBT)".
Strong and Radiative Meson Decays in a Generalized Nambu--Jona-Lasinio Model
Creators: name: Bernard, V.
name: Blin, A. H.
name: Hiller, B.
name: Meißner, U. -G.
name: Ruivo, M. C.
Publisher: name: arXiv
Year: 1993
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We investigate strong and radiative meson decays in a generalized Nambu--Jona-Lasinio model. The one loop order calculation provides a satisfactory agreement with the data for the mesonic spectrum and for radiative decays. Higher order effects for strong decays of $ρ$ and $K^*$ are estimated to be large. We also discuss the role of the flavour mixing determinantal interaction.
description: 7 pages, LaTeX, 2 figs available upon request, CRN 92-49
On Cosmological String Backgrounds with Toroidal Isometries
Creators: name: Giveon, Amit
name: Pasquinucci, Andrea
Publisher: name: arXiv
Year: 1992
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A large class of cosmological solutions (of the Einstein equations) in string theory, in the presence of Maxwell fields, is obtained by $O(d,d)$ transformations of simple backgrounds with $d$ toroidal isometries. In all the examples in which we find a (closed) expanding universe, such that the universe admits a smooth, complete initial value hypersurface, a naked singularity may form only at the time when the universe collapses. The discrete symmetry group $O(d,d,Z)$ identifies different cosmological solutions with a background corresponding to a (relatively) simple CFT, and therefore, may be useful in understanding the properties of naked singularities in string theory.
description: 10 pages, IASSNS-HEP-92/55
Repository and CRIS Interoperability Workshop
Creators: name: Mennielli, Michele
name: de Castro, Pablo
name: Clements, Anna
Publisher: name: Zenodo
Year: 2019
Subjects: Repositories
System interoperability
Research Information Management
Contextual metadata
CRIS

description: Following the very successful DuraSpace and euroCRIS Interoperability event held within the June 2018 CRIS conference in Umeå, this workshop will bring together case studies for institutional CRIS/repository integration for Open Science implementation purposes. The workshop is aimed at system-agnostic repository managers and developers interested in the enhancement in functionality that the integration with CRIS systems rich in contextual metadata can bring to them. The recently published report 'Practices and Patterns in Research Information Management: Findings from a Global Survey' shows an ever increasing integration of repository and CRIS solutions worldwide that the event will explore via a set of presentations and panel discussions. Attendees to the workshop will get an insight into the state-of-the-art system integration among different platforms and will be able to discuss opportunities and challenges related to these integrations. These will address areas like drivers for CRIS/repository integration, realisation of technical interoperability across systems and the roles of the various institutional units in the implementation and management of the integrated system.
On the evolution and fate of supermassive stars
Creators: name: Yungelson, L. R.
name: Heuvel, E. P. J. van den
name: Vink, Jorick S.
name: Zwart, S. F. Portegies
name: de Koter, A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the evolution and fate of solar composition supermassive stars in the mass range 60 - 1000 Msun. Our study is relevant both for very massive objects observed in young stellar complexes as well as supermassive stars that may potentially form through runaway stellar collisions. We predict the outcomes of stellar evolution employing a mass-loss prescription that is consistent with the observed Hertzsprung-Russell Diagram location of the most massive stars. We compute a series of stellar models with an appropriately modified version of the Eggleton evolutionary code. We find that super-massive stars with initial masses up to 1000 Msun end their lives as objects less massive than ~150 Msun. These objects are expected to collapse into black holes (with M < 70 Msun) or explode as pair-instability supernovae. We argue that if ultraluminous X-ray sources (ULXs) contain intermediate-mass black holes, these are unlikely to be the result of runaway stellar collisions in the cores of young clusters.
description: 26 pages, 15 figures, accepted by A&A. small language corrections
MOESM1 of Moderate maternal separation mitigates the altered synaptic transmission and neuronal activation in amygdala by chronic stress in adult mice
Creators: name: Qin, Xia
name: He, Ye
name: Wang, Na
name: Zou, Jia-Xin
name: Zhang, Yong-Mei
name: Cao, Jun-Li
name: Pan, Bing-Xing
name: Zhang, Wen-Hua
Publisher: name: figshare
Year: 2019
Subjects: subject: Biochemistry
subject: Neuroscience
subject: Physiology
subject: FOS: Biological sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: Mental Health
subject: Infectious Diseases
subject: FOS: Health sciences

description: Additional file 1: Figure S1. No significant effect on the total locomotion and closed arm entries in the EPM, and a time course of locomotion in the OF tests by MS and CSDS. a Comparison of the total distance travelled in the elevated plus maze (Control: n = 15 mice, CSDS: n = 13 mice, MS: n = 16 mice, MS + CSDS: n = 16 mice). b Comparison of entries in closed arms in the elevated plus maze (Control: n = 15 mice, CSDS: n = 13 mice, MS, MS + CSDS: n = 16 mice). c Comparison of time course of locomotion in the open field test (Control: n = 12 mice, CSDS: n = 14 mice, MS, MS + CSDS: n = 11 mice). All data are presented as the mean ± SEM.
Preserving Social Media posts: a case study with "In Her Shoes"
Creators: name: Long, Kevin
name: Cassidy, Kathryn
name: O'Carroll, Aileen
Publisher: name: Zenodo
Year: 2019
Subjects: Social Media
preservation

description: On 25th May 2018, the Irish people voted to remove the controversial "8th Amendment" to the Irish Constitution, opening the way for the introduction of legislation governing the termination of pregnancy in the State. The Digital Repository of Ireland was asked to archive the materials from a grass-roots social-media-based group campaigning in the run-up to the referendum.. The poster will present some of the difficulties encountered when attempting to archive these social media posts and describe the approach taken by the DRI to overcome them. It will also show the open-source facebook-to-dc tool developed by DRI which may be used by others to generate Dublin Core metadata and textual asset files from a Facebook Group.
Massive Spin-1 Field Chiral Lagrangian from an Extended Nambu-Jona-Lasinio Model of QCD
Creators: name: Prades, Joaquim
Publisher: name: arXiv
Year: 1993
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a calculation of the coupling constants in the massive spin-1 field chiral Lagrangian to chiral ${\cal O}(p^3)$ in the context of an extended Nambu--Jona-Lasinio cut-off model. Phenomenological applications of this Lagrangian to anomalous and non-anomalous low-energy hadronic transitions involving spin-1 particles are also discussed.
description: 38 text pages + 6 pages of figures in LaTeX, uses FEYNMAN macro package, Marseille preprint CPT-93/P.2871
Neutrinoless double-beta decay with massive scalar emission
Creators: name: Blum, Kfir
name: Nir, Yosef
name: Shavit, Michal
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Searches for neutrino-less double-beta decay ($0\nu2β$) place an important constraint on models where light fields beyond the Standard Model participate in the neutrino mass mechanism. While $0\nu2β$ experimental collaborations often consider various massless majoron models, including various forms of majoron couplings and multi-majoron final-state processes, none of these searches considered the scenario where the "majoron" $ϕ$ is not massless, $m_ϕ\sim$~MeV, of the same order as the $Q$-value of the $0\nu2β$ reaction. We consider this parameter region and estimate $0\nu2βϕ$ constraints for $m_ϕ$ of order MeV. The constraints are affected not only by kinematical phase space suppression but also by a change in the signal to background ratio characterizing the search. As a result, $0\nu2βϕ$ constraints for $m_ϕ>0$ diminish significantly below the reaction threshold. This has phenomenological implications, which we illustrate focusing on high-energy neutrino telescopes. Our results motivate a dedicated analysis by $0\nu2β$ collaborations, analogous to the dedicated analyses targeting massless majoron models.
description: 9 pages, 6 figures. v2: added App.A w/ phase space integrals, a few added comments, match journal version