cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Are there scaling solutions in the O(N)-models for large N in d>4?
Creators: name: Percacci, R.
name: Vacca, G. P.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: There have been some speculations about the existence of critical unitary O(N)-invariant scalar field theories in dimensions 4
description: 5 pages, 4 figures, expanded introduction, in press on PRD
Active Tree of Life WikiProjects and recommended structure for articles
Creators: name: Leachman, Siobhan
Publisher: name: Zenodo
Year: 2024
Subjects: Wikipedia
Species
Article

description: A list of active English Wikipedia Tree of Life WikiProjects and their associated recommendations for the structure of applicable articles. Links are also provided to lists of either Featured Articles or Good Quality English Wikipedia articles that apply to each WikiProject. Examples are also given of English Wikipedia species articles that have been classified as having stub, start or C class quality.
Aggregating Single-wheeled Mobile Robots for Omnidirectional Movements
Creators: name: Wang, Meng
name: Su, Yao
name: Li, Hang
name: Li, Jiarui
name: Liang, Jixiang
name: Liu, Hangxin
Publisher: name: arXiv
Year: 2023
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: This paper presents a novel modular robot system that can self-reconfigure to achieve omnidirectional movements for collaborative object transportation. Each robotic module is equipped with a steerable omni-wheel for navigation and is shaped as a regular icositetragon with a permanent magnet installed on each corner for stable docking. After aggregating multiple modules and forming a structure that can cage a target object, we have developed an optimization-based method to compute the distribution of all wheels' heading directions, which enables efficient omnidirectional movements of the structure. By implementing a hierarchical controller on our prototyped system in both simulation and experiment, we validated the trajectory tracking performance of an individual module and a team of six modules in multiple navigation and collaborative object transportation settings. The results demonstrate that the proposed system can maintain a stable caging formation and achieve smooth transportation, indicating the effectiveness of our hardware and locomotion designs.
Variabilidad genética de Tilapia cf. zilli (Teleostei : Cichlidae) en los oasis de Baja California Sur, México /
Creators: name: Jullian Montañez, Alain Gabriel
Publisher: name: Universidad Autónoma de Baja California.
Year: 2022
Subjects: subject: Tilapia Genética||Carpas (Peces) Genética||Biología||Tesis
subject: QL638.C55 J85 2005

description: Se analizó la variabilidad genética de poblaciones del pez exótico etiópico Tilapia cf. zilli en cuatro ceuncas hidrológicas de Baja California Sur, mediante RAPD´s con 4 cebadores y un total 43 loci analizados.
Zipf's Law for All the Natural Cities around the World
Creators: name: Jiang, Bin
name: Yin, Junjun
name: Liu, Qingling
Publisher: name: arXiv
Year: 2014
Subjects: subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: Two fundamental issues surrounding research on Zipf's law regarding city sizes are whether and why this law holds. This paper does not deal with the latter issue with respect to why, and instead investigates whether Zipf's law holds in a global setting, thus involving all cities around the world. Unlike previous studies, which have mainly relied on conventional census data such as populations, and census-bureau-imposed definitions of cities, we adopt naturally (in terms of data speaks for itself) delineated cities, or natural cities, to be more precise, in order to examine Zipf's law. We find that Zipf's law holds remarkably well for all natural cities at the global level, and remains almost valid at the continental level except for Africa at certain time instants. We further examine the law at the country level, and note that Zipf's law is violated from country to country or from time to time. This violation is mainly due to our limitations; we are limited to individual countries, or to a static view on city-size distributions. The central argument of this paper is that Zipf's law is universal, and we therefore must use the correct scope in order to observe it. We further find Zipf's law applied to city numbers; the number of cities in the first largest country is twice as many as that in the second largest country, three times as many as that in the third largest country, and so on. These findings have profound implications for big data and the science of cities. Keywords: Night-time imagery, city-size distributions, head/tail division rule, head/tail breaks, big data
description: 20 pages, 6 figures, 2 tables
A Four-Pronged Defense Against Byzantine Attacks in Federated Learning
Creators: name: Wan, Wei
name: Hu, Shengshan
name: Li, Minghui
name: Lu, Jianrong
name: Zhang, Longling
name: Zhang, Leo Yu
name: Jin, Hai
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cryptography and Security (cs.CR)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: \textit{Federated learning} (FL) is a nascent distributed learning paradigm to train a shared global model without violating users' privacy. FL has been shown to be vulnerable to various Byzantine attacks, where malicious participants could independently or collusively upload well-crafted updates to deteriorate the performance of the global model. However, existing defenses could only mitigate part of Byzantine attacks, without providing an all-sided shield for FL. It is difficult to simply combine them as they rely on totally contradictory assumptions. In this paper, we propose FPD, a \underline{\textbf{f}}our-\underline{\textbf{p}}ronged \underline{\textbf{d}}efense against both non-colluding and colluding Byzantine attacks. Our main idea is to utilize absolute similarity to filter updates rather than relative similarity used in existingI works. To this end, we first propose a reliable client selection strategy to prevent the majority of threats in the bud. Then we design a simple but effective score-based detection method to mitigate colluding attacks. Third, we construct an enhanced spectral-based outlier detector to accurately discard abnormal updates when the training data is \textit{not independent and identically distributed} (non-IID). Finally, we design update denoising to rectify the direction of the slightly noisy but harmful updates. The four sequentially combined modules can effectively reconcile the contradiction in addressing non-colluding and colluding Byzantine attacks. Extensive experiments over three benchmark image classification datasets against four state-of-the-art Byzantine attacks demonstrate that FPD drastically outperforms existing defenses in IID and non-IID scenarios (with $30\%$ improvement on model accuracy).
description: This paper has been accepted by the 31st ACM International Conference on Multimedia (MM '23)
Flujo meridional de calor en las latitudes 24° y 31° en el Atlántico sur /
Creators: name: Guerrero Moreno, Lorena
Publisher: name: Universidad Autónoma de Baja California.
Year: 2022
Subjects: subject: Oceáno Temperatura||Oceáno Temperatura Atlántico||Temperatura Metodología||Oceanología||Tesis
subject: GC173 G84 2003

description: Se utilizaron mediciones In Situ de la corriente de Brasil, dos secciones oceanográficas y valores del promedio anual del esfuerzo del viento en latitudes 24° y 31°s para calcular el transporte meridional del calor en el Atlántico Sur en esas latitudes.
A comprehensive analysis and future prospects on battery energy storage systems for electric vehicle applications
Creators: name: Arandhakar, Sairaj
name: Nakka, Jayaram
name: Krishna, V. B Murali
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Biophysics
subject: Biochemistry
subject: Physical Sciences not elsewhere classified
subject: Physiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Evolutionary Biology
subject: Chemical Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Science Policy

description: Rechargeable batteries with improved energy densities and extended cycle lifetimes are of the utmost importance due to the increasing need for advanced energy storage solutions, especially in the electric vehicle (EV) industry. To satisfy the demanding requirements of electric vehicle applications such as increased efficiency, cost-effectiveness, longer cycle life, and energy density. This article takes a close look at both traditional and innovative battery technologies. This study compares the performance, cost-effectiveness, and technical attributes of different types of batteries, including Redox Flow Batteries (RFB), Sodium-Ion Batteries (SIB), Lithium Sulfur Batteries (LSB), Lithium-Ion Batteries (LIB), Solid State Batteries (SSB), Dual Ion Batteries (DIB), and Metal Air Batteries (MAB). As the batteries are being charged, the SSB, DIB, and MAB batteries exhibit remarkable State of Charge (SoC) values of 83.2%, 83.5%, and 83.7%, respectively. There are three distinct maximum energy densities for these batteries 415Wh/kg, 550Wh/kg, and 984Wh/kg. The cycle life for these batteries is 1285, 1475, and 1525 cycles/s. A deeper analysis of battery categories reveals SSB, DIB, and MAB as standout technologies. Among them, SSB, DIB, and MAB exhibit the most promising potential for widespread adoption, signaling a significant advancement in battery technology.
Improving Deep Attractor Network by BGRU and GMM for Speech Separation
Creators: name: Melhem, Rawad
name: Jafar, Assef
name: Hamadeh, Riad
Publisher: name: arXiv
Year: 2023
Subjects: subject: Sound (cs.SD)
subject: Artificial Intelligence (cs.AI)
subject: Audio and Speech Processing (eess.AS)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Deep Attractor Network (DANet) is the state-of-the-art technique in speech separation field, which uses Bidirectional Long Short-Term Memory (BLSTM), but the complexity of the DANet model is very high. In this paper, a simplified and powerful DANet model is proposed using Bidirectional Gated neural network (BGRU) instead of BLSTM. The Gaussian Mixture Model (GMM) other than the k-means was applied in DANet as a clustering algorithm to reduce the complexity and increase the learning speed and accuracy. The metrics used in this paper are Signal to Distortion Ratio (SDR), Signal to Interference Ratio (SIR), Signal to Artifact Ratio (SAR), and Perceptual Evaluation Speech Quality (PESQ) score. Two speaker mixture datasets from TIMIT corpus were prepared to evaluate the proposed model, and the system achieved 12.3 dB and 2.94 for SDR and PESQ scores respectively, which were better than the original DANet model. Other improvements were 20.7% and 17.9% in the number of parameters and time training, respectively. The model was applied on mixed Arabic speech signals and the results were better than that in English.
Assessment and quantification of cytokine changes following surgery
Creators: name: Pereira, Christopher
Publisher: name: Imperial College London
Year: 2022

description: Cytokines are ubiquitous small proteins which act as chemical messengers in nearly all biological processes, including facilitating the normal healing process in the postoperative period. Following aseptic surgery outside the central nervous system (CNS), there is a growing appreciation that cytokine levels increase in the brain. In the CNS, cytokines are mainly released from microglia, the resident immune cell of the brain. The increased cytokine levels likely contribute to neuroinflammation, but the complex mechanisms through which this occurs are incompletely understood. These CNS cytokine changes may play a part in the normal healing process, or they may have a role in driving peri-operative neurocognitive disorders such as post-operative delirium. This thesis covers three separate studies. The first, influenced by the pandemic, considers serum cytokine changes in patients who were previously infected with SARSCoV- 2. This study also included an investigation highlighting how initial viral load and serial antibody levels are not related to post-Covid-19 syndrome (PCS). The second study considers cytokine changes in blood and cerebrospinal fluid (CSF) after emergency surgery for a hip fracture. This demonstrated that there are marked increases in IL-6 and IL-8 following surgery. These changes were more marked in CSF than in blood. The third study analyses cytokine changes in the blood and CSF in patients undergoing elective vascular surgery. This replicated the findings of the second study, demonstrating significant increases in CSF cytokines, particularly in IL-6 and IL-8. A comparison was then made between the two surgical groups. This showed that the CSF cytokine foldchanges were more marked in the hip fracture group than the vascular surgery group. There was no correlation between blood and CSF cytokine changes in each group. This suggests that measuring blood cytokines cannot be used as a surrogate marker for CSF cytokine changes.
Color dipole cross section and inelastic structure function
Creators: name: Jeong, Yu Seon
name: Kim, C. S.
name: Luu, Minh Vu
name: Reno, Mary Hall
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Instead of starting from a theoretically motivated form of the color dipole cross section in the dipole picture of deep inelastic scattering, we start with a parametrization of the deep inelastic structure function for electromagnetic scattering with protons, and then extract the color dipole cross section. Using the parametrizations of $F_2(ξ=x \ {\rm or}\ W^2,Q^2)$ by Donnachie-Landshoff and Block et al., we find the dipole cross section from an approximate form of the presumed dipole cross section convoluted with the perturbative photon wave function for virtual photon splitting into a color dipole with massless quarks. The color dipole cross section determined this way reproduces the original structure function within about 10\% for $0.1$ GeV$^2\leq Q^2\leq 10$ GeV$^2$. We discuss the large and small form of the dipole cross section and compare with other parameterizations.
description: 11 pages, 12 figures
Every conformal class contains a metric of bounded geometry
Creators: name: Müller, Olaf
name: Nardmann, Marc
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: 510 Mathematik

description: We show that on every manifold, every conformal class of semi-Riemannian metrics contains a metric g such that each kth-order covariant derivative of the Riemann tensor of g has bounded absolute value ak . This result is new also in the Riemannian case, where one can arrange in addition that g is complete with injectivity and convexity radius ¸ 1. One can even make the radii rapidly increasing and the functions ak rapidly decreasing at infinity. We prove generalizations to foliated manifolds, where curvature, second fundamental form and injectivity radius of the leaves can be controlled similarly. Moreover, we explain a general principle that can be used to obtain analogous results for Riemannian manifolds equipped with arbitrary other additional geometric structures instead of foliations.
Eficiencia del muestreo etnofarmacológico en la detección de compuestos bioactivos a partir de organismos marinos utilizados en la medicina tradicional Comcáac /
Creators: name: Narchi Narchi, Nemer Eduardo
Publisher: name: Universidad Autónoma de Baja California.
Year: 2022
Subjects: subject: Compuestos bioactivos||Oceanología Biología||Tesis
subject: QP517.B44 N37 2003

description: La química de productos naturales de origen marino (QPNM) comienza a considerarse una disciplina formal en la década de los 50. Su edad es relativamente joven comparada con otras ciencias.
Stellar ages, and how the NOT can help us.
Creators: name: Galindo-Guil, F.J.
name: D. Barrado
name: H. Bouy
name: J. Olivares
name: A. Bayo
name: M. Morales-Calderón
name: N. Huélamo
name: L. M. Sarro
name: P. Riviére-Marichalar
name: H. Stoev
name: B. Montesinos
name: S. Moran
name: T. Pursimo
Publisher: name: Zenodo
Year: 2022

description: Unravelling the age is one of the most challenging tasks since most are subject to significant uncertainties, and their determinations face multiple observational and theoretical challenges. Ages are generally better determined in stellar associations. They usually provide a significant sample of objects when testing the hypothesis that they were born simultaneously from the same molecular cloud and identical composition. Several features and characteristics are considered when deriving ages in stellar associations. However, each of them is valid within a specific age interval. In particular, we focus on those techniques related to lithium evolution, valid for values between 20 to a few hundred Ma. To address this task, we need spectrographs with enough resolving power to determine the presence or absence of lithium in FGK dwarfs, low-mass stars and brown dwarfs.
 Here we present our pilot study of the observing capabilities of the NOT with ALFOSC and FIES to determine ages in several stellar associations systematically.
ERP correlates of the interactions between top-down and bottom-up
      processes in visual object categorization
Creators: name: Linnert, Szilvia
Publisher: name: Lancaster University
Year: 2018

description: Numerous studies have reported category differences between animate and
      inanimate objects in the early visual ERP components. However,
      contradictory explanations have been suggested for the underlying
      processes of such category differences. Both low-level physical
      differences and higher-level category-specific processes have been shown
      to modulate the visual ERPs. The present research investigates how
      physical features (such as amplitude spectrum and spatial frequency) and
      top-down processes (the categorization task that the participants perform)
      interact and modulate the visual ERPs. We found ERP correlates of
      categorical representation for animal and inanimate object categories, as
      well as early, task-related top-down modulation of the visual ERPs. These
      results indicate that top-down factors can modulate visual processing both
      at the level of lower-level physical features and at the level of category
      representations. The results are discussed in terms of shape- and/or
      category-selective representations and brain areas in the ventral visual
      pathway, and they are interpreted within the framework of flexible
      evidence accumulation processes.
D4.1 Integrated BEACONING Ecosystem
Creators: name: Antoniu Ștefan, Ioana Andreea Ștefan
Publisher: name: Zenodo
Year: 2019
Subjects: game-based learning, game-based education

description: Deliverable 4.1 Integrated BEACONING Ecosystem implements part of Deliverable 3.6 System

architecture and presents the core services of the cloud-based learning platform, describing

the key functions that carry out the asset management, the minigames management, and the

game plots management. The services provide a full-featured built-in user management that

can easily authenticate users across platform components.

The deliverable introduces the Personal Data Store component that concerns privacy

protections of student data and sensitive data management during small- and large-scale

piloting, in accordance with the Data Management Plans defined in D1.7 and D1.8. It details

the interaction workflow for obtaining and managing the real identities of the students

involved in BEACONING piloting.

The system is based on an open architecture that allows new components to be integrated

using a set of documented APIs, and maintains an equal level of privileges between build-in

components and third-party components from the ecosystem.

To facilitate increased user adoption, the services are provided through a cloud-based

approach but can also be deployed locally if needed.
Optimal control of elastic vector-valued Allen-Cahn variational inequalities
Creators: name: Farshbaf-Shaker, Hassan
name: Hecht, Claudia
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: Vector-valued Allen-Cahn system, parabolic obstacle problems, linear elasticity, MPCCs, mathematical programs with complementarity constraints, optimality conditions
subject: 510 Mathematik
subject: 35K86
subject: 49K20
subject: 49K21
subject: 49J20
subject: 35R35

description: In this paper we consider a elastic vector-valued Allen-Cahn MPCC (Mathematical Programs with Complementarity Constraints) problem. We use a regularization approach to get the optimality system for the subproblems. By passing to the limit in the optimality conditions for the regularized subproblems, we derive certain generalized first-order necessary optimality conditions for the original problem.
Fast image segmentation and restoration using parametric curve evolution with junctions and topology changes
Creators: name: Benninghoff, Heike
name: Garcke, Harald
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: Image segmentation, restoration, active contours, region based, Mumford-Shah, Chan- Vese, parametric method, variational methods, topology changes, equidistribution, triple junctions
subject: 510 Mathematik
subject: 94A08
subject: 68U10
subject: 65K10
subject: 35K55
subject: 49Q10

description: Curve evolution schemes for image segmentation based on a region based contour model allowing for junctions, vector-valued images and topology changes are introduced. Together with an a posteriori denoising in the segmented homogeneous regions this leads to a fast and efficient method for image segmentation and restoration. An uneven spread of mesh points is avoided by using the tangential degrees of freedom. Several numerical simulations on artificial test problems and on real images illustrate the performance of the method.
Eliminating spurious velocities with a stable approximation of incompressible two-phase flow
Creators: name: Barrett, John W.
name: Garcke, Harald
name: Nürnberg, Robert
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: incompressible two-phase flow, Stokes equations, free boundary problem, surface tension, finite elements, XFEM, front tracking
subject: 510 Mathematik

description: We present a parametric finite element approximation of two-phase flow. This free boundary problem is given by the Stokes equations in the two phases, which are coupled via jump conditions across the interface. Using a novel variational formulation for the interface evolution gives rise to a natural discretization of the mean curvature of the interface. In addition, the mesh quality of the parametric approximation of the interface does not deteriorate, in general, over time; and an equidistribution property can be shown for a semidiscrete continuous-in-time variant of our scheme in two space dimensions. Moreover, on using a simple XFEM pressure space enrichment, we obtain exact volume conservation for the two phase regions. Furthermore, our fully discrete finite element approximation can be shown to be unconditionally stable. We demonstrate the applicability of our method with some numerical results which, in particular, demonstrate that spurious velocities can be avoided in the classical test cases.
Convergence of nodal sets in the adiabatic limit
Creators: name: Lampart, Jonas
Publisher: name: arXiv
Year: 2014
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We study the nodal sets of non-degenerate eigenfunctions of the Laplacian on fibre bundles $π{:}\, M\to B$ in the adiabatic limit. This limit consists in considering a family $G_\varepsilon$ of Riemannian metrics, that are close to Riemannian submersions, for which the ratio of the diameter of the fibres to that of the base is given by $\varepsilon \ll 1$. We assume $M$ to be compact and allow for fibres $F$ with boundary, under the condition that the ground state eigenvalue of the Dirichlet-Laplacian on $F_x$ is independent of the base point. We prove for $\mathrm{dim} B \leq 3$ that the nodal set of the Dirichlet-eigenfunction $φ$ converges to the pre-image under $π$ of the nodal set of a function $ψ$ on $B$ that is determined as the solution to an effective equation. In particular this implies that the nodal set meets the boundary for $\varepsilon$ small enough and shows that many known results on this question, obtained for some types of domains, also hold on a large class of manifolds with boundary. For the special case of a closed manifold $M$ fibred over the circle $B=S^1$ we obtain finer estimates and prove that every connected component of the nodal set of $φ$ is smoothly isotopic to the typical fibre of $π{:}\, M\to S^1$.
description: revised version, Annals of Global Analysis and Geometry, 2014
Cooperative Colorization: Exploring Latent Cross-Domain Priors for NIR Image Spectrum Translation
Creators: name: Yang, Xingxing
name: Chen, Jie
name: Yang, Zaifeng
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Near-infrared (NIR) image spectrum translation is a challenging problem with many promising applications. Existing methods struggle with the mapping ambiguity between the NIR and the RGB domains, and generalize poorly due to the limitations of models' learning capabilities and the unavailability of sufficient NIR-RGB image pairs for training. To address these challenges, we propose a cooperative learning paradigm that colorizes NIR images in parallel with another proxy grayscale colorization task by exploring latent cross-domain priors (i.e., latent spectrum context priors and task domain priors), dubbed CoColor. The complementary statistical and semantic spectrum information from these two task domains -- in the forms of pre-trained colorization networks -- are brought in as task domain priors. A bilateral domain translation module is subsequently designed, in which intermittent NIR images are generated from grayscale and colorized in parallel with authentic NIR images; and vice versa for the grayscale images. These intermittent transformations act as latent spectrum context priors for efficient domain knowledge exchange. We progressively fine-tune and fuse these modules with a series of pixel-level and feature-level consistency constraints. Experiments show that our proposed cooperative learning framework produces satisfactory spectrum translation outputs with diverse colors and rich textures, and outperforms state-of-the-art counterparts by 3.95dB and 4.66dB in terms of PNSR for the NIR and grayscale colorization tasks, respectively.
description: Accepted by ACMMM 2023
Gupta-Bleuler quantization of the Maxwell field in globally hyperbolic space-time
Creators: name: Finster, Felix
name: Strohmaier, Alexander
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: 510 Mathematik

description: We give a complete framework for the Gupta-Bleuler quantization of the free electromagnetic field on globally hyperbolic space-times. We describe oneparticle structures that give rise to states satisfying the microlocal spectrum condition. The field algebra in the so-called Gupta-Bleuler representations satisfies the time-slice axiom, and the corresponding vacuum states satisfy the microlocal spectrum condition. We also give an explicit construction of ground states on ultrastatic space-times. Unlike previous constructions, our method does not require a spectral gap or the absence of zero modes. The only requirement, the absence of zero-resonance states, is shown to be stable under compact perturbations of topology and metric. Usual deformation arguments based on the time-slice axiom then lead to a construction of Gupta-Bleuler representations on a large class of globally hyperbolic space-times. As usual, the field algebra is represented on an indefinite inner product space, in which the physical states form a positive semi-definite subspace. Gauge transformations are incorporated in such a way that the field can be coupled perturbatively to a Dirac field. Our approach does not require any topological restrictions on the underlying space-time.
Refined error estimates for the Riccati equation with applications to the angular Teukolsky equation
Creators: name: Finster, Felix
name: Smoller, Joel
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: 510 Mathematik

description: We derive refined rigorous error estimates for approximate solutions of Sturm-Liouville and Riccati equations with real or complex potentials. The approxi- mate solutions include WKB approximations, Airy and parabolic cylinder functions, and certain Bessel functions. Our estimates are applied to solutions of the angular Teukolsky equation with a complex aspherical parameter in a rotating black hole Kerr geometry.
Aplicaciones de la tecnología RFID /
Creators: name: Ibarra Hernández, José Alberto
Publisher: name: Universidad Autónoma de Baja California.
Year: 2022
Subjects: subject: Radiofrecuencia||Radiofrecuencia Aplicación||Sistemas de identificación de radiofrecuencia Radio frequency identification systems (RFID)||Ciencias copuacionales||Tesis
subject: TK6553 i23 2005

description: En este trabajo se caracteriza la tecnología RFID (Radio Frequency Identification), se señalan algunos de sus padecimientos para el fácil desarrollo de aplicaciones sobre esta misma tecnología.
title: Προστασία και ανίχνευση απο επιθέσεις τύπου SQL injection
title: Protection and detection of SQL injection attacks
titleType: AlternativeTitle
Creators: name: Παναγιωτόπουλος, Ευάγγελος
Publisher: name: Πανεπιστήμιο Δυτικής Αττικής
Year: 2021
Subjects: MySQL
SQL
Βάσεις δεδομένων
Oracle
Microsoft SQL Server
Python
Databases
SQL injection
Cyber attack

description: Η προσπάθεια έγχυσης κώδικα με σκοπό να αποκτηθεί παράνομη πρόσβαση, είναι ένα απο τα πιο φλέγον ζητήματα στην κυβερνοασφάλεια και ειδικότερα στον τομέα του hacking. Σε αυτή την διπλωματική θα αναφερθούν κάποιες βασικές έννοιες έτσι ώστε και ένας αναγνώστης χωρίς εξειδικευμένες γνώσεις να μπορεί να συμβαδίζει με την εξέλιξη της διπλωματικής. Θα γίνει εκτεταμένη έρευνα και εμβάθυνση στο κομμάτι του SQL Injection, όπως για παράδειγμα σε ποιές κατηγορίες χωρίζεται ή πώς πραγματοποιείται μία τέτοια επίθεση. Στη συνέχεια θα προταθούν αρκετοί τρόποι προστασίας απο την επίθεση αυτή τόσο κατα την διάρκεια ανάπτυξης μιας ιστοσελίδας ή μιας βάσης δεδομένων, όσο και αφού έχει πέσει θύμα αυτής. Μετά ακολουθεί η ανίχνευση, όπου θα αναλυθεί πως μπορούμε να ανιχνεύσουμε ενδεχομένως, μία βάση δεδομένων ή μία ιστοσελίδα προκειμένου να μην είναι ευάλωτη και τέλος προσεγγίζεται μέσω μιας άλλης οπτικής η ανίχνευση της SQL Injection όπου θα αναπτυχθεί εργαλείο σε γλώσσα προγραμματισμού Python, που θα ανιχνεύει αν μία βάση δεδομένων είναι ευάλωτη στην συγκεκριμένη κατηγορία SQL Injection, error-based δηλαδή βασιζόμενο στα σφάλματα που μπορεί να επιστρέψει σαν αποτέλεσμα στον χρήστη μία βάση δεδομένων.
Topology of the planar phase of superfluid $^3$He and bulk-boundary correspondence for three dimensional topological superconductors
Creators: name: Makhlin, Yuriy
name: Silaev, Mikhail
name: Volovik, G. E.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We provide topological classification of possible phases with the symmetry of the planar phase of superfluid $^3$He. Compared to the B-phase (class DIII in classification of Altland and Zirnbauer), it has an additional symmetry, which modifies the topology. We analyze the topology in terms of explicit mappings from the momentum space and also discuss explicitly topological invariants for the B-phase. We further show, how the bulk-boundary correspondence for the 3D B-phase can be inferred from that for the 2D planar phase. A general condition is derived for the existence of topologically stable zero modes at the surfaces of 3D superconductors with class DIII symmetries.
A note on closed isometric embeddings
Creators: name: Müller, Olaf
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: 510 Mathematik

description: A famous theorem due to Nash ([3]) assures that every Riemannian manifold can be embedded isometrically into some Euclidean space En. An interesting question is whether for a complete manifold M we can find a closed isometric embedding. This note gives the affirmative answer to this question asked to the author by Paolo Piccione.
Desarrollo de una red neuronal híbrida para la clasificación de registros sísmicos /
Creators: name: Mendoza Camberos, Juan Antonio
Publisher: name: Universidad Autónoma de Baja California.
Year: 2022
Subjects: subject: Redes neuronales (Ciencias computacionales)||Ingeniería||Tesis
subject: QA76.87 M49 2005

description: En este trabajo se describe el desarrollo de una red neuronal híbrida, la cual se basa en el paradigma ANFIS (Adaptive Neuro-Fuzzy Inference System), combinando lógica difusa con redes neuronales aplicada a la clasificación de registros sísmicos.
Loading the dice : perspectives on climate change communication in Australia 1987-2001
Creators: name: Taylor, Maria Johanna
Publisher: name: The Australian National University
Year: 2012
Subjects: subject: GE30.5.A8 T39 2012
subject: Communication in the environmental sciences Australia
subject: Climatic changes

description: For almost 40 years I had the naive view that if we simply obtain more physical understanding of the issue, we could provide "the" answers and responses would be rational. I now see that there is absolutely no guarantee of this. It is ourselves we do not understand. Atmospheric scientist Graeme Pearman, personal communication, February 17, 2009 The broad theme of this "science and society" study is the communication of anthropogenic climate change over the period 1987-2001 in Australia. Adding a novel science communication analysis to existing studies of policy and media presented the opportunity to broaden understanding of how this society engaged with a unique environmental issue. Relying on the public documentary record, supported by interviews, the investigation found and analysed dramatic changes to communication in correlation with changing public policy and evidence of public knowledge during the course of the study period. Against expectation, the changes went from a high level of early good understanding of climate change risk and response to a high level of confusion and conflict by the end of the study period, while the basic science messages remained consistent throughout. A framing lens was developed to study public language in the documentary record. Major social and cultural influences on the framing were identified and analysed, combining insights from other research fields with original evidence from the thesis research. This study thereby contributes some new insights for communication of environmental science, specifically climate change. It also offers a novel case study in Australian science history.
p-adic Eisenstein series and L-functions of certain cusp forms on definite unitary groups
Creators: name: Eischen, Ellen
name: Wan, Xin
Publisher: name: arXiv
Year: 2014
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: We construct p-adic families of Klingen Eisenstein series and L-functions for cuspforms (not necessarily ordinary) unramified at an odd prime p on definite unitary groups of signature (r, 0) (for any positive integer r) for a quadratic imaginary field split at p. When r=2, we show that the constant term of the Klingen Eisenstein family is divisible by a certain p-adic L-function.
description: Accepted for publication in the Journal of the Institute of Mathematics of Jussieu
[Halle (Saale), Universitäts- und Landesbibliothek Sachsen-Anhalt, Morbio 2 (67)]
Creators: name: Homobonus
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 1225
Subjects: subject: Bischofsurkunde
subject: Notarsurkunde
subject: Urkunde
subject: 090

description: Homobonus Medalbertus, Bischof von Cremona, bestätigt die Belehnung des Cumanus, frater und clericus der Kirche St. Andreae in Morbasco, die Albertonus, praepositus von St. Cataldi, vorgenommen hatte.
Double Gated Single Molecular Transistor for Charge Detection
Creators: name: Ray, S. J.
name: Chowdhury, R.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The electrostatic behaviour of an 1,3-Cyclobutadiene (C$_{4}$H$_{4}$) based Single Molecular Transistor (SMT) has been investigated using the first principle calculation based on Density functional Theory and non-equilibrium Green's function approach. While the molecule is placed on top of a dielectric layer (backed by a metallic gate) and weakly coupled between the Source/Drain electrodes, the charge stability diagram revealed the presence of individual charge states in the Coulomb Blockade regime. This gets affected significantly on addition of an another gate electrode placed on the top of the molecule. This modified double-gated geometry allows additional control of the total energy of the system that is sensitive to the individual charge states of the molecule which can be used as a charge sensing technique operational at room temperature.
description: 7 pages, 4 figures
title: Ο ρόλος των επενδύσεων στην κλιματική αλλαγή στο πλαίσιο επίτευξης των στόχων για τη βιώσιμη ανάπτυξη
title: The role of investments in climate change in the context of achieving sustainable development goals
titleType: AlternativeTitle
Creators: name: Ροκά, Θεοδώρα
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2023
Subjects: subject: Βιώσιμη ανάπτυξη
subject: Κλιματική σλλαγή
subject: Επιστημονικά Τεκμηριωμένοι Στόχοι (SBTs)
subject: Χρηματοοικονομικά ιδρύματα
subject: Επενδύσεις

description: Η κλιματική αλλαγή αποτελεί παγκόσμιο ζήτημα με επιπτώσεις στη Βιώσιμη Ανάπτυξη και επηρεάζει ποικίλους τομείς, όπως τη φύση, την κοινωνία και τις επιχειρήσεις. Σημαντικότερος παράγοντας που συμβάλλει στην επιδείνωση της κατάστασης αποτελεί η ανθρωπογενής δραστηριότητα, που οδηγεί σε πρωτόγνωρη αύξηση των εκπομπών του θερμοκηπίου στην ατμόσφαιρα. Προκειμένου να αντιμετωπιστεί αυτό το καίριο πρόβλημα κρίνεται μείζονος σημασίας η ανάληψη δράσης των Χρηματοοικονομικών Ιδρυμάτων που μπορούν να ασκήσουν επιρροή μέσω της ενεργούς επικοινωνίας με τις εταιρείες που συνεργάζονται, χρηματοδοτούν και επενδύουν και με αυτό τον τρόπο να λειτουργήσουν ως καταλύτες για την αλλαγή σε όλο το εύρος της πραγματικής οικονομίας. Οι επιστημονικά τεκμηριωμένοι στόχοι (SBT) αποτελούν σημαντικό εργαλείο για τις εταιρείες προκειμένου να θέσουν στόχους με βάση τις τελευταίες έρευνες για το κλίμα, προκειμένου να αναλάβουν δράση και να μετρήσουν την πρόοδό τους στη μείωση των εκπομπών προς την κατεύθυνση της κλιματικής ουδετερότητας, με στόχο τη διατήρηση της υπερθέρμανσης του πλανήτη στους 1,5οC έως το 2050. Για την επίτευξη αυτών, απαραίτητη κρίνεται η επιτάχυνση των προσπαθειών, δίνοντας βάση στη συνεργασία μεταξύ όλων των εμπλεκόμενων μερών, αλλά και η παροχή κινήτρων προς τις επιχειρήσεις προκειμένου να λάβουν αποτελεσματικά μέτρα.
Interpretation of the Cosmological Constant Problem within the Framework of Generalized Uncertainty Principle
Creators: name: Miao, Yan-Gang
name: Zhao, Ying-Jie
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose an improved exponential Generalized Uncertainty Principle (GUP) by introducing a positive integer $n$ called the suppressing index. Due to the UV/IR mixing brought by the GUP, the states with momenta smaller than the critical momentum ($P < P_{\rm Crit}$) are canceled by the states with momenta larger than the critical momentum ($P > P_{\rm Crit}$) and thus have no contributions to the energy density of the vacuum. By considering the contributions just from the states with momenta larger than the critical momentum ($P > P_{\rm Crit}$) and choosing a suitable suppressing index, $n \sim 10^{123}$, we calculate the cosmological constant consistent with the experimentally observed value.
description: 10 pages, no figures; v2: clarifications added; v3: 11 pages, title slightly changed, clarifications added, the final version to appear in IJMPD
[Halle (Saale), Universitäts- und Landesbibliothek Sachsen-Anhalt, Morbio 2 (177 a)]
Creators: name: Petrus
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 1243
Subjects: subject: Sonstige weltliche Aussteller
subject: Notarsurkunde
subject: Urkunde
subject: 090

description: Petrus de Sancto Petro aus Novara zeigt dem Ugo Angosola, Aufseher der Kriegsgefangenen des Kaisers in Cremona, ein Mandat König Heinrichs von Sardinien bezüglich der Freilassung von kaiserlichen und Mailänder Gefangenen im Austausch gegen Petrus de Sancto Petro.
El estero y su entorno :
Creators: name: Kusters Viale, Diana F
Publisher: name: Universidad Autónoma de Baja California.
Year: 2022
Subjects: subject: Erosión de playas Baja California Punta Banda, Estero de||Oceanología||Tesis
subject: GB458.85 K88 2005

description: La Boca del Estero de Punta Banda permite el intercambio de agua entre el Estero de Punta Banda y la Bahía de Todos Santos.
The grain of the voice of the cyborg
Creators: name: Lunt, Jillian
Publisher: name: The University of Texas at Austin
Year: 2023
Subjects: Vocalic body
Cyborg
Vocal timbre
Electronic music
Ghosting
Laura Les
Wendy Carlos
Imogen Heap
T-Pain
Vocoder
Auto-Tune
Recording technology
Music production
Grain of the voice

description: This report is an attempt to use the vocalic body, an imaginative construction of the body of origin for an acousmatic voice, as a tool for examining vocal timbre in conjunction with electronic music and external vocal technologies. By recounting historical reactions to electronic vocal technologies, exploring Wendy Carlos’ and Laura Les’ uses of these technologies in conjunction with transfemininity, and examining the evolution of Imogen Heap’s “Hide and Seek” as mediated by a variety of these technologies, this report demonstrates the ability of vocalic body constructions to utilize shared language for novel and insightful evaluations of vocal timbre in electronic music. The author suggests that discussions of the vocalic body can benefit future theorizations of vocal timbre.
On Certain Wronskians of Multiple Orthogonal Polynomials
Creators: name: Zhang, Lun
name: Filipuk, Galina
Publisher: name: arXiv
Year: 2014
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics

description: We consider determinants of Wronskian type whose entries are multiple orthogonal polynomials associated with a path connecting two multi-indices. By assuming that the weight functions form an algebraic Chebyshev (AT) system, we show that the polynomials represented by the Wronskians keep a constant sign in some cases, while in some other cases oscillatory behavior appears, which generalizes classical results for orthogonal polynomials due to Karlin and Szegő. There are two applications of our results. The first application arises from the observation that the $m$-th moment of the average characteristic polynomials for multiple orthogonal polynomial ensembles can be expressed as a Wronskian of the type II multiple orthogonal polynomials. Hence, it is straightforward to obtain the distinct behavior of the moments for odd and even $m$ in a special multiple orthogonal ensemble - the AT ensemble. As the second application, we derive some Turán type inequalities for multiple Hermite and multiple Laguerre polynomials (of two kinds). Finally, we study numerically the geometric configuration of zeros for the Wronskians of these multiple orthogonal polynomials. We observe that the zeros have regular configurations in the complex plane, which might be of independent interest.
Proteínas reconocidas por un fragmento variable de cadena sencilla (scFv) de gallina dirigido en contra de Xylella fastidiosa /
Creators: name: Alvarez Delgado, Paulo César
Publisher: name: Universidad Autónoma de Baja California.
Year: 2022
Subjects: subject: Enfermedades bacterianas||Pierce's Enfermedades||Xylella fastidiosa||Biología||Tesis
subject: SB608.G7 A58 2006

description: El objetivo de este trabajo fué determinar el antígeno al cual se le une un fragmento variable de cadena sencilla (scFv) de 33 kDa construído a partir de genes de lg de una gallina inmunizada con células de PD Xylella fastidiosa STL.
Public sector innovation : unlocking the impact of transformational leadership in a cross-cultural context
Creators: name: Nolan, Jeremy William Marden
Publisher: name: The Australian National University
Year: 2012
Subjects: subject: JF1351.N65 2012
subject: Public administration
subject: Transformational leadership
subject: Technological innovations

description: Innovation is increasingly seen as a key determinant of organizational success and survival. The importance of innovation is not confined to the private sector. The public sector accounts for a large share of gross domestic product in all advanced economies and its increased efficiency can therefore make a major contribution to productivity and economic development. The public sector also affects performance in the private sector in many ways, including its role in policy development, regulation, and as a customer for goods and services provided by the private sector. Among the factors that can potentially impact innovation in organizations, leadership is considered vital, with transformational leadership demonstrated as being more effective than other leadership styles in this regard. Transformational leaders can have a pervasive effect on creativity and innovation, both directly through their behaviours and actions, and indirectly through their influence on the organizational environment. Despite this importance, we know little about the direct and indirect ways that transformational leadership impacts innovation in a public sector context. The aim of this thesis is to develop new theory to inform practice through systematic empirical research grounded in theory. The central research question asks: What is the relationship between transformational leadership and innovation in a public sector context? In addition to the direct relationship between transformational leadership and innovation, the thesis examines the indirect or mediating roles of the organizational climate for innovation and psychological empowerment. Transformational leadership, together with the two mediating mechanisms, are also deconstructed to provide a more in-depth analysis of the component relationships. The major finding of the study is that senior organizational leaders in the public sector exhibit many traits that typify transformational leadership. However, their behaviours and actions do not directly impact innovation outcomes, rather they exert a significant indirect influence through the organizational environment. The findings suggest that the models that are well established and accepted in the private sector are not adequate in the public sector and that fresh theorizing is required. The thesis examines a rare large-scale empirical sample and adds to the body of knowledge about the determinants of public sector innovation, in particular, the direct and indirect role played by transformational leadership. It is anticipated this knowledge will provide practitioners with new ways to manage innovation programs and thereby improve organizational productivity and performance.