cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A Six Degree-Of-Freedom Haptic Device Based On The Orthoglide And A Hybrid Agile Eye
Creators: name: Chablat, Damien
name: Wenger, Philippe
Publisher: name: arXiv
Year: 2007
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: This paper is devoted to the kinematic design of a new six degree-of-freedom haptic device using two parallel mechanisms. The first one, called orthoglide, provides the translation motions and the second one, called agile eye, produces the rotational motions. These two motions are decoupled to simplify the direct and inverse kinematics, as it is needed for real-time control. To reduce the inertial load, the motors are fixed on the base and a transmission with two universal joints is used to transmit the rotational motions from the base to the end-effector. Two alternative wrists are proposed (i), the agile eye with three degrees of freedom or (ii) a hybrid wrist made by the assembly of a two-dof agile eye with a rotary motor. The last one is optimized to increase its stiffness and to decrease the number of moving parts.
Shadow and weak deflection angle of extended uncertainty principle black hole surrounded with dark matter
Creators: name: Pantig, Reggie C.
name: Yu, Paul K.
name: Rodulfo, Emmanuel T.
name: Övgün, Ali
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper, we discuss the possible effects of dark matter on a Schwarzschild black hole with the correction of extended uncertainty principle (EUP), such as the parameter $α$ and the large fundamental length scale $L_*$. In particular, we surround the EUP black hole of mass $m$ with a static spherical shell of dark matter described by the parameters mass $M$, inner radius $r_s$, and thickness $Δr_s$. In this study, we find that there is no deviation in the event horizon, which readily implies that the black hole temperature due to the Hawking radiation is independent of any dark matter concentration. In addition, we show some effects of the EUP parameter on the innermost stable circular orbit (ISCO) radius of time-like particles, photon sphere, shadow radius, and weak deflection angle. It is found that time-like orbits are affected by deviation of low values of mass $M$. A greater dark matter density is needed to have remarkable effects on the null orbits. Using the analytic expression for the shadow radius and the approximation $Δr_s>>r_s$, it is revealed that $L_*$ should not be lower than $2m$. To broaden the scope of this study, we also calculate the analytic expression for the weak deflection angle using the Ishihara et al. method \cite{Ishihara_2016}. As a result, we show that $Δr_s$ is improved by a factor of $(1+4αm^2/L_*^2)$ due to the EUP correction parameters. The calculated shadow radius and weak deflection angle are then compared using the estimated values of the galactic mass from Sgr A*, M87, and UGC 7232, as well as the mass of the supermassive black hole at their center.
description: 27 pages, 9 figures, edits/improvements on abstract and discussion, fixed some typos, added more references
Spontaneous chirality via long-range electrostatic forces
Creators: name: Kohlstedt, Kevin L.
name: Solis, Francisco
name: Vernizzi, Graziano
name: de la Cruz, Monica Olvera
Publisher: name: arXiv
Year: 2007
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We consider a model for periodic patterns of charges constrained over a cylindrical surface. In particular we focus on patterns of chiral helices, achiral rings or vertical lamellae, with the constraint of global electroneutrality. We study the dependence of the patterns' size and pitch angle on the radius of the cylinder and salt concentration. We obtain a phase diagram by using numerical and analytic techniques. For pure Coulomb interactions, we find a ring phase for small radii and a chiral helical phase for large radii. At a critical salt concentration, the characteristic domain size diverges, resulting in macroscopic phase segregation of the components and restoring chiral symmetry. We discuss possible consequences and generalizations of our model.
description: Revtex, 4 pages, 4 figures
Hodge metrics and the curvature of higher direct images
Creators: name: Mourougane, Christophe
name: Takayama, Shigeharu
Publisher: name: arXiv
Year: 2007
Subjects: subject: Algebraic Geometry (math.AG)
subject: Complex Variables (math.CV)
subject: FOS: Mathematics

description: Using the harmonic theory developed by Takegoshi for representation of relative cohomology and the framework of computation of curvature of direct images bundles by Berndtsson, we prove that the higher direct images by a smooth morphism of the relative canonical bundle twisted by a semi-positive vector bundle are locally free and semi-positively curved, when endowed with a suitable Hodge type metric.
description: Arguments are simplified. To appear in Ann. Sci. Ecole Norm. Sup
Mesoscopic fluctuations of the supercurrent in diffusive Josephson junctions
Creators: name: Houzet, M.
name: Skvortsov, M. A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We study mesoscopic fluctuations and weak localization correction to the supercurrent in Josephson junctions with coherent diffusive electron dynamics in the normal part. Two kinds of junctions are considered: a chaotic dot coupled to superconductors by tunnel barriers and a diffusive junction with transparent normal--superconducting interfaces. The amplitude of current fluctuations and the weak localization correction to the average current are calculated as functions of the ratio between the superconducting gap and the electron dwell energy, temperature, and superconducting phase difference across the junction. Technically, fluctuations on top of the spatially inhomogeneous proximity effect in the normal region are described by the replicated version of the σ-model. For the case of diffusive junctions with transparent interfaces, the magnitude of mesoscopic fluctuations of the critical current appears to be nearly 3 times larger than the prediction of the previous theory which did not take the proximity effect into account.
description: 19 pages, 14 figures, 2 tables
SAILFISH: Vetting Smart Contract State-Inconsistency Bugs in Seconds
Creators: name: Bose, Priyanka
name: Das, Dipanjan
name: Chen, Yanju
name: Feng, Yu
name: Kruegel, Christopher
name: Vigna, Giovanni
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: Programming Languages (cs.PL)
subject: FOS: Computer and information sciences

description: This paper presents SAILFISH, a scalable system for automatically finding state-inconsistency bugs in smart contracts. To make the analysis tractable, we introduce a hybrid approach that includes (i) a light-weight exploration phase that dramatically reduces the number of instructions to analyze, and (ii) a precise refinement phase based on symbolic evaluation guided by our novel value-summary analysis, which generates extra constraints to over-approximate the side effects of whole-program execution, thereby ensuring the precision of the symbolic evaluation. We developed a prototype of SAILFISH and evaluated its ability to detect two state-inconsistency flaws, viz., reentrancy and transaction order dependence (TOD) in Ethereum smart contracts. Further, we present detection rules for other kinds of smart contract flaws that SAILFISH can be extended to detect. Our experiments demonstrate the efficiency of our hybrid approach as well as the benefit of the value summary analysis. In particular, we show that S SAILFISH outperforms five state-of-the-art smart contract analyzers (SECURITY, MYTHRIL, OYENTE, SEREUM and VANDAL ) in terms of performance, and precision. In total, SAILFISH discovered 47 previously unknown vulnerable smart contracts out of 89,853 smart contracts from ETHERSCAN .
Currency Forward Introduction and Valuation Guide
Creators: name: Lee, David
Publisher: name: Zenodo
Year: 2020
Subjects: FX forward, currency forward, FX forward rate, FX forward valuation

description: A currency forward or FX forward contract is an agreement that allows the buyer to lock in an exchange rate the day on which the agreement is signed for a transaction that will be completed later. Forward contracts are one of the main methods used to hedge against exchange rate volatility, as they avoid the impact of currency fluctuation over the period covered by the contract.
description: https://ia903403.us.archive.org/16/items/fx-forward-19/FxForward-archive.pdf
Analyse Comparative des Manipulateurs 3R à Axes Orthogonaux
Creators: name: Baili, Maher
name: Chablat, Damien
name: Wenger, Philippe
Publisher: name: arXiv
Year: 2007
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: A family of 3R orthogonal manipulators without offset on the third body can be divided into exactly nine workspace topologies. The workspace is characterized in a half-cross section by the singular curves. The workspace topology is defined by the number of cusps and nodes that appear on these singular curves. Based on this classification, we evaluate theses manipulators by the condition number related to the joint space and the proportion of the region with four inverse kinematic solutions compared to a sphere containing all the workspace. This second performance number is in relation with the workspace. We determine finally le topology of workspace to which belong manipulators having the best performance number values.
Stem Cell Differentiation in Collagen-ELP-Bioglass Scaffolds for Guided Bone Regeneration
Creators: name: Bhuvaneswari Gurumurthy
name: Amol V. Janorkar
Publisher: name: figshare
Year: 2021
Subjects: subject: 110501 Dental Materials and Equipment
subject: FOS: Clinical medicine
subject: 110599 Dentistry not elsewhere classified

description: https://iadr.abstractarchives.com/abstract/18iags-2954828/stem-cell-differentiation-in-collagen-elp-bioglass-scaffolds-for-guided-bone-regeneration
Collective flow in single-hit QCD kinetic theory
Creators: name: Kurkela, Aleksi
name: Mazeliauskas, Aleksas
name: Törnkvist, Robin
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Motivated by recent interest in collectivity in small systems, we calculate the harmonic flow response to initial geometry deformations within weakly coupled QCD kinetic theory using the first correction to the free-streaming background. We derive a parametric scaling formula that relates harmonic flow in systems of different sizes and different generic initial gluon distributions. We comment on similarities and differences between the full QCD effective kinetic theory and the toy models used previously. Finally we calculate the centrality dependence of the integrated elliptic flow $v_2$ in oxygen-oxygen, proton-lead and proton-proton collision systems.
description: Published version. The following changes has been made: updated discussion in section 3.1 and plots of elliptic flow scaling. Added plots for triangular flow scaling. Revised section 3.3 with an improved procedure
Optimization of Collagen-ELP-Bioglass Composite Scaffolds for Guided Bone Regeneration
Creators: name: Bhuvaneswari Gurumurthy
name: Griggs, Jason
name: Amol V. Janorkar
Publisher: name: figshare
Year: 2021
Subjects: subject: 110501 Dental Materials and Equipment
subject: FOS: Clinical medicine
subject: 110599 Dentistry not elsewhere classified

description: https://iadr.abstractarchives.com/abstract/47am-2840432/optimization-of-collagen-elp-bioglass-composite-scaffolds-for-guided-bone-regeneration
Dynamics of Open Quantum Systems II, Markovian Approximation
Creators: name: Merkli, Marco
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: A finite-dimensional quantum system is coupled to a bath of oscillators in thermal equilibrium at temperature $T>0$. We show that for fixed, small values of the coupling constant $λ$, the true reduced dynamics of the system is approximated by the completely positive, trace preserving Markovian semigroup generated by the Davies-Lindblad generator. The difference between the true and the Markovian dynamics is $O(|λ|^{1/4})$ for all times, meaning that the solution of the Gorini-Kossakowski-Sudarshan-Lindblad master equation is approximating the true dynamics to accuracy $O(|λ|^{1/4})$ for all times. Our method is based on a recently obtained expansion of the full system-bath propagator. It applies to reservoirs with correlation functions decaying in time as $1/t^{4}$ or faster, which is a significant improvement relative to the previously required exponential decay.
description: Comments and explanations added according to referee requests -- version as published in journal Quantum
Stellar kinematics in the remote Leo II dwarf spheroidal galaxy -- Another brick in the wall
Creators: name: Koch, A.
name: Kleyna, J. T.
name: Wilkinson, M. I.
name: Grebel, E. K.
name: Gilmore, G. F.
name: Evans, N. W.
name: Wyse, R. F. G.
name: Harbeck, D. R.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the projected velocity dispersion profile for the remote (d=233kpc) Galactic dwarf spheroidal (dSph) galaxy Leo II, based on 171 discrete stellar radial velocities that were obtained from medium-resolution spectroscopy using the FLAMES/GIRAFFE spectrograph at the European Southern Observatory, Chile. The dispersion profile of those stars with good membership probabilities is essentially flat with an amplitude of 6.6+-0.7 km/s over the full radial extent of our data, which probe to the stellar boundary of this galaxy. We find no evidence of any significant apparent rotation or velocity asymmetry which suggests that tidal effects cannot be invoked to explain Leo II's properties. From basic mass modeling, employing Jeans' equation, we derive a mass out to the limiting radius of (2.7+-0.5) 10^7 Msun and a global mass to light ratio of 27-45 in solar units, depending on the adopted total luminosity. A cored halo profile and a mild amount of tangential velocity anisotropy is found to account well for Leo II's observed kinematics, although we cannot exclude the possibility of a cusped halo with radially varying velocity anisotropy. All in all, this galaxy exhibits dark matter properties which appear to be concordant with the other dSph satellites of the Milky Way, namely a halo mass profile which is consistent with a central core and a total mass which is similar to the common mass scale seen in other dSphs.
description: 17 pages, 10 figures, accepted for publication in the AJ
Melonic large $N$ limit of $5$-index irreducible random tensors
Creators: name: Carrozza, Sylvain
name: Harribey, Sabine
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We demonstrate that random tensors transforming under rank-$5$ irreducible representations of $\mathrm{O}(N)$ can support melonic large $N$ expansions. Our construction is based on models with sextic ($5$-simplex) interaction, which generalize previously studied rank-$3$ models with quartic (tetrahedral) interaction (arXiv:1712.00249 and arXiv:1803.02496). Beyond the irreducible character of the representations, our proof relies on recursive bounds derived from a detailed combinatorial analysis of the Feynman graphs. Our results provide further evidence that the melonic limit is a universal feature of irreducible tensor models in arbitrary rank.
description: 49 pages, 66 figures, v2: references, nomenclature and comments added, Lemma 1 and Theorem 1 amended, qualitative results unchanged Commun. Math. Phys., to appear
An Exhaustive Study of the Workspace Topologies of all 3R Orthogonal Manipulators with Geometric Simplifications
Creators: name: Zein, Mazen
name: Wenger, Philippe
name: Chablat, Damien
Publisher: name: arXiv
Year: 2007
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: This paper analyses the workspace of the three-revolute orthogonal manipulators that have at least one of their DH parameters equal to zero. These manipulators are classified into different groups with similar kinematic properties. The classification criteria are based on the topology of the workspace. Each group is evaluated according to interesting kinematic properties such as the size of the workspace subregion reachable with four inverse kinematic solutions, the existence and the size of voids, and the size of the regions of feasible paths in the workspace.
BIOCHEMICAL ANALYSIS OF THE PORTAL PROTEIN FROM A DSDNA VIRUS
Creators: name: Cipriano, Joseph Florence Valesco
Publisher: name: Zenodo
Year: 2021
Subjects: portal protein
bacteriophage
lambda
virus

description: Portal proteins play an integral role in viral infection, capsid assembly, and DNA packaging. Bacteriophage lambdas use portal proteins in each of these roles. The portal protein is a dodecameric ring that acts as a nucleation site for capsid assembly proteins to build from, allows the passage of DNA into the capsid during DNA packaging, and the only exit point for DNA to leave the capsid when infection occurs. The goal of this research is to produce a soluble portal protein. Modeling the portal protein of a bacteriophage lambda, gpB, allowed the visualization of the disordered ends that contributed the insolubility of the portal protein. After truncating the portal protein’s insoluble ends, the DNA was mutated to also express a Glutathione-S-Transferase (GST) tag. Once the gpB-GST was expressed and solubilized, the portal protein was cleaved from GST and purified using Anion Exchange Chromatography. After obtaining a purified gpB sample, the protein was sequenced to determine sequence of the cleaved product. Using these methods, the cleaved product was able to be produced. The final monomeric form of the protein contains 420 amino acids. By incorporating buffers that contained Tris with a pH of 8.0, gpB was better stabilized throughout this process.
Optimization and estimation problems in airline yield management
Creators: name: McGill, Jeffrey I.
Publisher: name: University of British Columbia
Year: 2011

description: This thesis addresses problems of optimization and estimation encountered in the process of airline yield management, also called airline seat inventory control. Optimality conditions are given for the problem of setting booking limits for multiple, stochastically independent demand classes that are booked in a nested fashion into a fixed pool of airline seats. These optimality conditions are compared with the approximations given by the EMSR method. Additional conditions are given for two stochastically dependent fare classes, and extensions are made that allow for incorporation of passenger goodwill and upgrades of passengers between fare classes. The model developed for the dependent demand case is also applied to the problem of determining an optimal overbooking limit in a single fare class. Finally, a methodology is developed for using multivariate multiple regression in conjunction with the EM method to estimate the parameters of demand distributions on the basis of historical demand data that have been censored by the presence of booking limits.
Optimizing Quality System Procedures for Compliance and Efficiency for Pharmaceutical and Medical Device industries
Creators: name: Nagesh Naik, Krutika
name: Punnam Kulangara, Leena Fahmi
name: Satarkar, Mansi
name: Mariam Biju, Nishi
name: Khan, Sana
name: Jaysinh Roy, Sophia
name: Pirouzi, Peivand
Publisher: name: Crown College of Canada
Year: 2025

description: Structured Quality System Procedures (QSPs) are essential in the pharmaceutical and medical device industries for ensuring regulatory compliance, product safety, and operational efficiency. This study investigates best practices for QSP development, focusing on clarity, regulatory alignment, stakeholder collaboration, and risk based approaches. Analysis of standards such as Health Canada’s Food and Drugs Act (Health Canada, 2023), FDA 21 CFR Part 820 (Medical Devices; Quality System Regulation Amendments, 2024), ISO 13485, and ICH Q10 reveals their critical role in mitigating noncompliance risks and enhancing audit outcomes.
On sequentiality and well-bracketing in the $π$-calculus
Creators: name: Hirschkoff, Daniel
name: Prebet, Enguerrand
name: Sangiorgi, Davide
Publisher: name: arXiv
Year: 2021
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: The $π$-calculus is used as a model for programming languages. Its contexts exhibit arbitrary concurrency, making them very discriminating. This may prevent validating desirable behavioural equivalences in cases when more disciplined contexts are expected. In this paper we focus on two such common disciplines: sequentiality, meaning that at any time there is a single thread of computation, and well-bracketing, meaning that calls to external services obey a stack-like discipline. We formalise the disciplines by means of type systems. The main focus of the paper is on studying the consequence of the disciplines on behavioural equivalence. We define and study labelled bisimilarities for sequentiality and well-bracketing. These relations are coarser than ordinary bisimilarity. We prove that they are sound for the respective (contextual) barbed equivalence, and also complete under a certain technical condition. We show the usefulness of our techniques on a number of examples, that have mainly to do with the representation of functions and store.
Characterization and Optimization of Composite Scaffolds for Guided Bone Regeneration
Creators: name: Bhuvaneswari Gurumurthy
name: Amol V. Janorkar
name: Griggs, Jason
Publisher: name: figshare
Year: 2021
Subjects: subject: 110501 Dental Materials and Equipment
subject: FOS: Clinical medicine
subject: 110599 Dentistry not elsewhere classified

description: https://iadr.abstractarchives.com/abstract/45am-2401496/characterization-and-optimization-of-composite-scaffolds-for-guided-bone-regeneration
Black-body components in Gamma-Ray Bursts spectra?
Creators: name: Ghirlanda, G.
name: Bosnjak, Z.
name: Ghisellini, G.
name: Tavecchio, F.
name: Firmani, C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study 7 Gamma Ray Bursts (GRBs), detected both by the BATSE instrument, on-board the Compton Gamma Ray Observatory, and by the Wide Field Camera (WFC), on-board BeppoSAX. These bursts have measured spectroscopic redshifts and are a sizeable fraction of the bursts defining the correlation between the peak energy E_peak (i.e. the peak of the vFv spectrum) and the total prompt isotropic energy E_iso (the so called "Amati" relation). Recent theoretical interpretations of this correlation assume that black-body emission dominates the time resolved spectra of GRBs, even if, in the time integrated spectrum, its presence may be hidden by the change of its temperature and by the dilution of a possible non-thermal power law component. We perform a time resolved spectral analysis, and show that the sum of a power-law and a black-body gives acceptable fits to the time dependent spectra within the BATSE energy range, but overpredicts the flux in the WFC X-ray range. Moreover, a fit with a cutoff power-law plus a black-body is consistent with the WFC data, but the black-body component contributes a negligible fraction of the total flux. On the contrary, we find that fitting the spectra with a Band model or a simple cutoff power-law model yields an X-ray flux and spectral slope which well matches the WFC spectra.
description: 14 pages, 13 figures, accepted for publication in MNRAS
From Zero to Binder
Creators: name: Gibson, Sarah
Publisher: name: Zenodo
Year: 2021

description: From Zero to Binder tutorial presented as part of the Open Science in Action session at the AGU Fall Meeting 2021 Abstract While we can all acknowledge that being able to reproduce research in order to build upon it is a critical part of the scientific process, mastering the technology stack to achieve reproducibility can present a huge barrier. One tool that aims to lower this barrier is Project Binder, the free and public version of which is hosted at mybinder.org. This project consolidates a stack of openly developed technologies, including building reproducible computational environments and cloud infrastructure orchestration, into a single, simple-to-use web application. This web application can transform a static GitHub repository, containing Jupyter Notebook and scripts written in Python, Julia, R, and other languages, into an interactive computational environment hosted in the cloud. This environment can then be shared with anyone, anywhere via a single, clickable URL so that the analysis code and dataset can be interactively explored without the need for the user to install the software. During this hands-on tutorial, participants will be guided through creating their first Binder-ready repository on GitHub. The tutorial materials are suitable for all programming levels and are
 available at this link: http://bit.ly/zero-to-binder-python. Please note that a GitHub account is required to participate in this tutorial. If you don't already have one, please sign up here (it's free!): https://github.com/join
The Turing Way: A sustainable and inclusive solution to sharing best practices
Creators: name: Plomp, Esther
Publisher: name: Zenodo
Year: 2021
Subjects: FORCE 2021
reproducibility
The Turing Way
Community
data science

description: Presentation by Esther Plomp on the Turing Way during the FORCE2021 Conference on the 8th of December 2021. The Turing Way is a community-driven book project that involves and supports a diverse research community in ensuring that reproducible and ethical data research is "too easy not to do". The book is openly available under a CC-BY 4.0 license, and presents a sustainable alternative to the more traditional way of sharing best practices via articles. The Turing Way aims to bridge the gap between innovative data research techniques and best practices that make them accessible and comprehensible for everyone. The Turing Way is designed to be inclusive and accessible to its members from diverse backgrounds and expertise. We welcome ideas, case studies, impact stories, educational resources, or any sort of participation that individuals can benefit from or use to advance their knowledge in data research. All contributions, questions, comments, and discussions are made via an online repository: https://github.com/alan-turing-institute/the-turing-way. This ensures that all the contributions are openly accessible. To ensure long term preservation, a snapshot of the repository is also hosted on a data repository (https://doi.org/10.5281/zenodo.3233853). In this lightning talk, a community member will introduce the Turing Way Project and highlight the importance of creating a culture that promotes collaboration and accessibility to ensure the long-term sustainability of our communities.
Inside-Out Planet Formation: VI. Oligarchic Coagulation of Planetesimals from a Pebble Ring?
Creators: name: Cai, Maxwell X.
name: Tan, Jonathan C.
name: Zwart, Simon Portegies
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Inside-Out Planet Formation (IOPF) is a theory addressing the origin of Systems of Tightly-Packed Inner Planets (STIPs) via {\it in situ} formation and growth of the planets. It predicts that a pebble ring is established at the pressure maximum associated with the dead zone inner boundary (DZIB) with an inner disk magnetorotational instability (MRI)-active region. Using direct $N$-body simulations, we study the collisional evolution of planetesimals formed from such a pebble ring, in particular examining whether a single dominant planet emerges. We consider a variety of models, including some in which the planetesimals are continuing to grow via pebble accretion. We find that the planetesimal ring undergoes oligarchic evolution, and typically turns into 2 or 3 surviving oligarchs on nearly coplanar and circular orbits, independent of the explored initial conditions or form of pebble accretion. The most massive oligarchs typically consist of about $70\%$ of the total mass, with the building-up process typically finishing within $\sim 10^5$ years. However, a relatively massive secondary planet always remains with $\sim30-65\%$ of the mass of the primary. Such secondary planets have properties that are inconsistent with the observed properties of the innermost pairs of planets in STIPs. Thus, for IOPF to be a viable theory for STIP formation, it needs to be shown how oligarchic growth of a relatively massive secondary from the initial pebble ring can be avoided. We discuss some potential additional physical processes that should be included in the modeling and explored as next steps.
description: 15 pages, 10 figures, accepted for publication in MNRAS
Characterization and Optimization of Composite Scaffolds for Guided Bone Regeneration
Creators: name: Bhuvaneswari Gurumurthy
name: Amol V. Janorkar
name: Griggs, Jason
Publisher: name: figshare
Year: 2021
Subjects: subject: 110501 Dental Materials and Equipment
subject: FOS: Clinical medicine

description: Objectives: Collagen scaffolds for guided bone regeneration have poor mechanical properties and fail due to lack of rigidity and rapid degradation by collagenases. The objectives of this study were to reinforce collagen with elastin-like polypeptide (ELP) and optimize composite mechanical properties using novel response surface methodology (RSM).
Methods: 2-7mg/mL collagen and 0-24mg/mL ELP were used in 11 different proportions to form the composites (Fig.1). Tensile strength, elastic modulus and toughness of hydrated composites were determined by uniaxial tensile testing (n=6) and optimized by two factor (collagen/ELP concentration) analysis with RSM (DOE++ software). Composites (n=3) were characterized by swelling ratio, differential scanning calorimetry (DSC), scanning electron microscopy (SEM) and FTIR spectroscopy.
Results: Mechanical properties varied with composition (Fig.1a,b,c). H9 composite had the maximum strength (20.2±11.3kPa) and modulus (61.8±22.7kPa), but had lower toughness (0.20±0.04mJ/mm3) than many other composites. The efficient RSM technique performed equally weighted two-factor, three-objective optimization using just 5 compositions (versus the 11 we had to prepare for Fig.1a,b,c) and directed us to 6:12mg/mL collagen:ELP composition that may have high toughness without negatively impacting strength and modulus (Fig.1d,e). Physical characterization of freeze-dried H9 composite against its control (H7) by swelling ratio, DSC, and FTIR revealed that the addition of ELP in composites reduced the residual water content (swelling ratio for H7=53.8±3.7 versus H9=30.8±2.1). SEM images of both H7 (Fig.2a,c) and H9 (Fig.2b,d) composites showed porous fibrillar and afibrillar collagenous microstructure. Additionally, H9 composite showed dense microstructure with characteristic ELP aggregates.
Conclusions: A biomaterial with suboptimal properties should be optimized by a compromise between the minimal requirements, target level, and relative importance of each property. RSM efficiently performed such optimization for ELP-collagen composites and predicted a new composition for future testing. Our study demonstrated that ELP-Collagen composites have the capability to form good quality, rigid porous structures required for guided bone regeneration.
Matrix model partition function by a single constraint
Creators: name: Mironov, A.
name: Mishnyakov, V.
name: Morozov, A.
name: Rashkov, R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: In the recent study of Virasoro action on characters, we discovered that it gets especially simple for peculiar linear combinations of the Virasoro operators: particular harmonics of $\hat w$-operators. In this letter, we demonstrate that even more is true: a {\it single} $w$-constraint is sufficient to uniquely specify the partition functions provided one assumes that it is a power series in time-variables. This substitutes the previous specifications in terms of {\it two} requirements: either a string equation imposed on the KP/Toda $τ$-function or a pair of Virasoro generators. This mysterious {\it single}-entry definition holds for a variety of theories, including Hermitian and complex matrix models, and also matrix models with external matrix: the unitary and cubic Kontsevich models. In these cases, it is equivalent to W-representation and is closely related to {\it super}\,integrability. However, a similar single equation that completely determines the partition function exists also in the case of the generalized Kontsevich model (GKM) with the potential of higher degree, when the constraint algebra is a larger $W$-algebra, and neither W-representation nor superintegrability are understood well enough.
description: 11 pages
Dynamics of wave packets in two-dimensional crystals under external magnetic and electric fields: Vortices formation
Creators: name: Nazareno, H. N.
name: de Brito, P. E.
name: Rodrigues, E. S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In the present work we deal with the dynamics of wave packets in a two-dimensional crystal under the action of magnetic and electric fields. The magnetic field is perpendicular to the plane and the electric field is on the plane. In the simulations we considered a symmetric gauge for the vector potential while the initial wave packet was assumed to have a gaussian structure with given velocities. The parameters that control the kind of time evolution of the packets are: the width of the gaussian, its velocity, and, the intensity and direction of the electric field as well as the magnitude of the magnetic field. In order to characterize the kind of propagation we evaluated the mean-square displacement (MSD), the participation function and which is more important we were able to follow the wave at different times, which allowed us to see the time evolution of the centroid of the wave packets. A novel effect was observed, namely, the dynamics is such that the wave function \emph{splits} into two or more components and \emph{reconstructs} successively as time goes, vortices are forming. To our understanding this is the first time such an effect is reported. As for the inclusion of the electric field, we observe a complex behavior of the wave packet as well as note that the vortices propagate in direction perpendicular to the applied electric field. A similar behavior presented by the classical treatment, In our case we give a quantum mechanics explanation for that
Leray-Hopf solutions to a viscoelastoplastic fluid model with nonsmooth stress-strain relation
Creators: name: Eiter, Thomas
name: Hopf, Katharina
name: Mielke, Alexander
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35K61, 35Q35, 76A10, 76D03

description: We consider a fluid model including viscoelastic and viscoplastic effects. The state is given by the fluid velocity and an internal stress tensor that is transported along the flow with the Zaremba-Jaumann derivative. Moreover, the stress tensor obeys a nonlinear and nonsmooth dissipation law as well as stress diffusion. We prove the existence of global-in-time weak solutions satisfying an energy inequality under general Dirichlet conditions for the velocity field and Neumann conditions for the stress tensor.
description: Accepted for publication in Nonlinear Anal. Real World Appl
The symmetric heavy-light ansatz
Creators: name: Lee, Dean
Publisher: name: arXiv
Year: 2007
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Nuclear Theory (nucl-th)
subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: FOS: Physical sciences

description: The symmetric heavy-light ansatz is a method for finding the ground state of any dilute unpolarized system of attractive two-component fermions. Operationally it can be viewed as a generalization of the Kohn-Sham equations in density functional theory applied to N-body density correlations. While the original Hamiltonian has an exact Z_2 symmetry, the heavy-light ansatz breaks this symmetry by skewing the mass ratio of the two components. In the limit where one component is infinitely heavy, the many-body problem can be solved in terms of single-particle orbitals. The original Z_2 symmetry is recovered by enforcing Z_2 symmetry as a constraint on N-body density correlations for the two components. For the 1D, 2D, and 3D attractive Hubbard models the method is in very good agreement with exact Lanczos calculations for few-body systems at arbitrary coupling. For the 3D attractive Hubbard model there is very good agreement with lattice Monte Carlo results for many-body systems in the limit of infinite scattering length.
description: 38 pages, 13 figures, revised manuscript includes results for 1D, 2D, and 3D
title: Προγραμματισμός και διαχείριση έργων με πολλαπλά κριτήρια βελτιστοποίησης
title: Project planning and management with multiple optimization criteria
titleType: AlternativeTitle
Creators: name: Μπλατσιώτη, Ειρήνη-Δανάη
Publisher: name: Πανεπιστήμιο Δυτικής Αττικής
Year: 2021
Subjects: Διαχείριση έργου
Πολυκριτήρια ανάλυση
Προγραμματισμός έργου
Χρονικός προγραμματισμός
Project management

description: Το αντικείμενο της παρούσας διπλωματικής εργασίας είναι ο χρονικός προγραμματισμός των έργων λαμβάνοντας υπόψη πολλαπλούς στόχους, οι οποίοι λειτουργούν ανταγωνιστικά μεταξύ τους. Αρχικά, γίνεται μια αναφορά στους βασικούς ορισμούς της Διαχείρισης των Έργων καθώς και στις γνωστικές περιοχές που δίνεται μεγαλύτερη έμφαση. Έπειτα, μετά από ανασκόπηση της βιβλιογραφίας αναφέρονται τα διαφορετικά κριτήρια βελτιστοποίησης μέσα από μικρά παραδείγματα που μπορούν να χρησιμοποιηθούν για την κατασκευή του χρονοδιαγράμματος ενός έργου. Στην συνέχεια, μελετήθηκε η πολυκριτηριακή ανάλυση αποφάσεων για την διαχείριση της ανταγωνιστικότητας μεταξύ των κριτήριων δίνοντας μεγαλύτερη έμφαση στην οικογένεια μεθοδολογιών του Πολυστοχικού Γραμμικού Προγραμματισμού. Τέλος, εφαρμόστηκαν τα βήματα του Πολυστοχικού Γραμμικού Προγραμματισμού για την κατασκευή του χρονοδιαγράμματος ενός έργου λαμβάνοντας υπόψη την μεγιστοποίηση των ελεύθερων χρονικών περιθωρίων και την μεγιστοποίηση της καθαρής παρούσας αξίας. Το τελικό χρονοδιάγραμμα καθορίστηκε σύμφωνα με τις προτιμήσεις του αποφασίζοντα έπειτα από διάλογο μαζί του χρησιμοποιώντας τις μεθόδους των Ικανοποιητικών και Επιθυμητών Στόχων. Οι δύο μεθοδολογίες μελετήθηκαν αναλυτικά και συγκρίθηκαν μεταξύ τους.
Power Dependence of the Photocurrent Lineshape in a Semiconductor Quantum Dot
Creators: name: Russell, A.
name: Fal'ko, Vladimir I.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We propose a kinetic theory to describe the power dependence, $I_{PC}(P)$, of the photocurrent (PC) lineshape in optically pumped quantum dots at low temperatures, in both zero and finite magnetic fields. We show that there is a crossover power $P_c$, determined by the electron and hole tunneling rates, at which the photocurrent spectra become strongly influenced by the dot kinetics, and no longer reflect the exciton lifetime in the dot. For $P>P_c$, we show that the photocurrent saturates due to the slow hole escape rate (in e.g., InGaAs/GaAs dots), whereas the line-width increases with power: $Γ\propto \sqrt{P}$. We also analyze to what measure the spin-doublet lineshape of the photocurrent studied in a high magnetic field reflects the degree of circular polarization of the incident light.
description: 4 pages, 3 figures
AMS :: ATX October 2018 Blog Archive
Creators: name: Department Of American Studies
Publisher: name: American Studies
Year: 2018
Subjects: American Studies
Twitter

description: Contents: What I Did On My Summer Vacation: Janet Davis on Touring for American Experience Miniseries, The Circus -- María Magdalena Campos-Pons’s “Like the lonely traveler”: A Conversation with the Neon Queen Collective -- What I Did On My Summer Vacation: Judson Barber on Rollercoastering Through the South -- Five Questions with First-Years Returns: with Holly Genovese! -- ASA and NWSA 2018 Annual Conferences: List of UT-Austin Presenters -- This Friday (10/26): Michelle Tea Discusses Her New Book, Against Memoir -- Five Questions with First Years Continues: An Interview with Kristen Wilson
description: @AmStudies is a Twitter feed dedicated to representing the many activities and interests of the department of American Studies at The University of Texas at Austin. Together with the department’s blog, this feed exists to serve the AMS and Austin communities by acting as a hub for up-to-date information on events and opportunities at UT and beyond.
AMS :: ATX June 2018 Blog Archive
Creators: name: Department Of American Studies
Publisher: name: American Studies
Year: 2018
Subjects: American Studies
Twitter

description: Content: Dr. Lauren Gutterman Pens Essay in Slate: “Why Queer Teachers…Should Absolutely Have ‘Gay Agenda’ in Classroom”
description: @AmStudies is a Twitter feed dedicated to representing the many activities and interests of the department of American Studies at The University of Texas at Austin. Together with the department’s blog, this feed exists to serve the AMS and Austin communities by acting as a hub for up-to-date information on events and opportunities at UT and beyond.
Representación verbal y expresiva en el universo violento de La ciudad y los perros
Creators: name: Aguila, Jesús Miguel Delgado Del
Publisher: name: figshare
Year: 2021
Subjects: Literature

description: Delgado Del Aguila, Jesús Miguel (2019). «Representación verbal y expresiva en el universo violento de La ciudad y los perros», en: Litterata: Revista do Centro de Estudos Hélio Simões. Universidade Estadual de Santa Cruz, Brasil. Vol. 9, n.° 2, pp. 56-70. Disponible en https://doi.org/10.36113/litterata.v9i2.2429
AMS :: ATX November 2018 Blog Archive
Creators: name: Department Of American Studies
Publisher: name: American Studies
Year: 2018
Subjects: American Studies
Twitter

description: Contents: Book Talk (11/6): Dr. Leonard Moore to Discuss The Defeat of Black Power -- This Wednesday (11/7): Inaugural American Studies Film Club Screening: “I am Evidence” -- UT AMS Doctoral Candidate Natalie Zelt Featured in New Routledge Focal Press Companion (2018) -- What We Did in Atlanta: An ASA/NWSA Recap -- Du Bois @ 150 Symposium: Thursday, 11/29 -- Five Questions with First-Years: Taylor Johnson! -- Tomorrow (11/28): Diaspora Talk Series with Artist Tammie Rubin -- This Friday and Saturday (11/30-12/1): Symposium on Puerto Rico After Hurricane Maria
description: @AmStudies is a Twitter feed dedicated to representing the many activities and interests of the department of American Studies at The University of Texas at Austin. Together with the department’s blog, this feed exists to serve the AMS and Austin communities by acting as a hub for up-to-date information on events and opportunities at UT and beyond.
AMS :: ATX December 2018 Blog Archive
Creators: name: Department Of American Studies
Publisher: name: American Studies
Year: 2018
Subjects: American Studies
Twitter

description: Contents: Dr. Lauren Gutterman Writes for Jezebel about Flight Attendants’ Anti-Sexist Organizing -- What We Listened To This Year: The Official 2018 AMS::ATX Playlist
description: @AmStudies is a Twitter feed dedicated to representing the many activities and interests of the department of American Studies at The University of Texas at Austin. Together with the department’s blog, this feed exists to serve the AMS and Austin communities by acting as a hub for up-to-date information on events and opportunities at UT and beyond.
AMS :: ATX January 2019 Blog Archive
Creators: name: Department Of American Studies
Publisher: name: American Studies
Year: 2019
Subjects: American Studies
Twitter

description: Content: This Thursday (1/31): Dr. Nan Enstad to Give Lecture on “The Jim Crow Cigarette in China”
description: @AmStudies is a Twitter feed dedicated to representing the many activities and interests of the department of American Studies at The University of Texas at Austin. Together with the department’s blog, this feed exists to serve the AMS and Austin communities by acting as a hub for up-to-date information on events and opportunities at UT and beyond.
«La revancha» (cuento)
Creators: name: Aguila, Jesús Miguel Delgado Del
Publisher: name: figshare
Year: 2021
Subjects: Literature

description: Delgado Del Aguila, Jesús Miguel (2020). «La revancha» (cuento), en: Cuadernos del Hipogrifo. Revista Semestral de Literatura Hispanoamericana y Comparada. Roma, Italia. N.° 13, pp. 133-145. Disponible en http://www.revistaelhipogrifo.com/wp-content/uploads/2020/09/133-145.pdf
Additional file 3 of Undergraduate ultrasound training: prospective comparison of two different peer assisted course models on national standards
Creators: name: Weimer, Johannes
name: Dionysopoulou, Anna
name: Strelow, Kai-Uwe
name: Buggenhagen, Holger
name: Weinmann-Menke, Julia
name: Dirks, Klaus
name: Weimer, Andreas
name: Künzel, Julian
name: Börner, Norbert
name: Ludwig, Michael
name: Yang, Yang
name: Lorenz, Liv
name: Ille, Carlotta
name: Müller, Lukas
Publisher: name: figshare
Year: 2023
Subjects: Medicine
Neuroscience
Biological Sciences not elsewhere classified
Cancer
Science Policy
Mental Health

description: Supplementary Material 3
Renormalization group analysis on emergence of higher rank symmetry and higher moment conservation
Creators: name: Li, Hongchao
name: Ye, Peng
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Higher rank symmetry and higher moment conservation have been drawn considerable attention from, e.g., subdiffusive transport to fracton topological order. In this paper, we perform a one-loop renormalization group (RG) analysis and show how these phenomena emerge at low energies. We consider a $d$-dimensional model of interacting bosons of d components. At higher-rank-symmetric points with conserved angular moments, the $a$-th bosons have kinetic energy only along the $x^a$ direction. Therefore, the symmetric points look highly anisotropic and fine-tuned. By studying RG in a wide vicinity of the symmetric points, we find that symmetry-disallowed kinetic terms tend to be irrelevant within the perturbative regime, which potentially leads to emergent higher-rank symmetry and higher-moment conservation at the deep infrared limit. While non-perturbative analysis is called for in the future, by regarding higher-rank symmetry as an emergent phenomenon, the RG analysis presented in this paper holds alternative promise for realizing higher-rank symmetry and higher-moment conservation in experimentally achievable systems.