cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Depositional System and Facies Analysis in the Central Pattani Basin, Gulf Of Thailand
Creators: name: Nazhat Shirin Rashid
Publisher: name: Department of Geology, Chulalongkorn University
Year: 2014
Subjects: Pattani Basin, Fluvial, Estuarine, Coastal plain, RMS attribute analysis

description: Bulletin of Earth Sciences of Thailand (BEST), 7, 2-Jan, 146-153
Lateral density and arrival time distributions of Cherenkov photons in extensive air showers: a simulation study
Creators: name: Hazarika, P.
name: Goswami, U. D.
name: Chitnis, V. R.
name: Acharya, B. S.
name: Das, G. S.
name: Singh, B. B.
name: Britto, R. J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We have investigated some features of the density and arrival time distributions of Cherenkov photons in extensive air showers using the CORSIKA simulation package. The main thrust of this study is to see the effect of hadronic interaction models on the production pattern of Cherenkov photons with respect to distance from the shower core. Such studies are very important in ground based $γ$-ray astronomy for an effective rejection of huge cosmic ray background, where the atmospheric Cherenkov technique is being used extensively within the energy range of some hundred GeV to few TeV. We have found that for all primary particles, the density distribution patterns of Cherenkov photons follow the negative exponential function with different coefficients and slopes depending on the type of primary particle, its energy and the type of interaction model combinations. Whereas the arrival time distribution patterns of Cherenkov photons follow the function of the form $t (r) = t_{0}e^{Γ/r^λ}$, with different values of the function parameters. There is no significant effect of hadronic interaction model combinations on the density and arrival time distributions for the $γ$-ray primaries. However, for the hadronic showers, the effects of the model combinations are significant under different conditions.
description: 12 pages, 10 figures in Published in Astroparticle Physics, 2015
Virtual braids from a topological viewpoint
Creators: name: de La Cruz, Bruno Aaron Cisneros
Publisher: name: arXiv
Year: 2014
Subjects: subject: Group Theory (math.GR)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: Virtual braids are a combinatorial generalization of braids. We present abstract braids as equivalence classes of braid diagrams on a surface, joining two distinguished boundary components. They are identified up to isotopy, compatibility, stability and Reidemeister moves. We show that virtual braids are in a bijective correspondence with abstract braids. Finally we demonstrate that for any abstract braid, its representative of minimal genus is unique up to compatibility and Reidemeister moves. The genus of such a representative is thus an invariant for virtual braids. We also give a complete proof of the fact that there is a bijective correspondence between virtually equivalent virtual braid diagrams and braid-Gauss diagrams.
CP Violation with Majorana neutrinos in K Meson Decays
Creators: name: Dib, Claudio O.
name: Campos, Miguel
name: Kim, C. S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the possibility of having CP asymmetries in the decay Kaon(+/-) -> pion(-/+) lepton(+/-) lepton(+/-) (lepton = muon or electron). This decay violates Lepton Number by two units and occurs only if there are Majorana particles that mediate the transition. Even though the absolute rate is highly suppressed by current bounds, we search for Majorana neutrino scenarios where the CP asymmetry arising from the lepton sector could be sizeable. This is indeed the case if there are two or more Majorana neutrinos with similar masses in the range around 10^2 MeV. In particular, the asymmetry is potentially near unity if two neutrinos are nearly degenerate, in the sense that the mass difference is similar to the decay rate. The full decay, however, may be difficult to detect not only because of the suppression caused by the heavy-to-light lepton mixing, but also because of the long lifetime of the heavy neutrino, which would induce large space separation between the two vertices where the charge leptons are produced. This particular problem should be less serious in heavier meson decays, as they involve heavier neutrinos with shorter lifetimes.
description: 13 pages, 5 figures
Weak amenability for Fourier algebras of 1-connected nilpotent Lie groups
Creators: name: Choi, Yemon
name: Ghandehari, Mahya
Publisher: name: arXiv
Year: 2014
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: Primary 43A30. Secondary 46J10, 47B47

description: A special case of a conjecture raised by Forrest and Runde (Math. Zeit., 2005) asserts that the Fourier algebra of every non-abelian connected Lie group fails to be weakly amenable; this was aleady known to hold in the non-abelian compact cases, by earlier work of Johnson (JLMS, 1994) and Plymen (unpublished note). In recent work (JFA, 2014) the present authors verified this conjecture for the real ax+b group and hence, by structure theory, for any semisimple Lie group. In this paper we verify the conjecture for all 1-connected, non-abelian nilpotent Lie groups, by reducing the problem to the case of the Heisenberg group. As in our previous paper, an explicit non-zero derivation is constructed on a dense subalgebra, and then shown to be bounded using harmonic analysis. En route, we use the known fusion rules for Schrödinger representations to give a concrete realization of the "dual convolution" for this group as a kind of twisted, operator-valued convolution. We also give some partial results for solvable groups which give further evidence to support the general conjecture.
description: v1: AMS LaTeX, 20 pages, submitted. v2: AMS LaTeX, 21 pages; significant revisions to Sections 4 and 5 following improvements suggested by the referee, and references added. To appear in JFA; this is the final accepted author manuscript (CC-BY licence). v3: several minor typos fixed; metadata and acknowledgements updated
Applying heuristic methods for job scheduling in storage markets
Creators: name: Finkbeiner, Josef
name: Bodenstein, Christian
name: Schryen, Guido
name: Neumann, Dirk
Publisher: name: Universität Regensburg
Year: 2010
Subjects: subject: Decision Support System, Algorithms, Optimization, Market Engineering
subject: 330 Wirtschaft
subject: 000 Allgemeines, Wissenschaft

description: In double-sided markets for computing resources an optimal allocation schedule among job offers and requests subject to relevant capacity constraints can be determined. With increasing storage demands and emerging storage services the question how to schedule storage jobs becomes more and more interesting. Since such scheduling problems are often in the class NP-complete an exact computation is not feasible in practice. On the other hand an approximation to the optimal solution can easily be found by means of using heuristics. The problem with this attempt is that the suggested solution may not be exactly optimal and is thus less satisfying. Considering the two above mentioned solution approaches one can clearly find a trade-off between the optimality of the solution and the efficiency to get to a solution at all. This work proposes to apply and combine heuristics in optimization to gain from both of their benefits while reducing the problematic aspects. Following this method it is assumed to get closer to the optimal solution in a shorter time compared to a full optimization.
A comprehensive and comparative analysis of the patching behavior of open source and closed source software vendors
Creators: name: Schryen, Guido
Publisher: name: Universität Regensburg
Year: 2009
Subjects: subject: 330 Wirtschaft
subject: 000 Allgemeines, Wissenschaft

description: While many theoretical arguments against or in favor of open source and closed source software development have been presented, the empirical basis for the assessment of arguments is still weak. Addressing this research gap, this paper presents a comprehensive empirical investigation of the patching behavior of software vendors/communities of widely deployed open source and closed source software packages, including operating systems, database systems, web browsers, email clients, and office systems. As the value of any empirical study relies on the quality of data available, this paper also discusses in detail data issues, explains to what extent the empirical analysis can be based on vulnerability data contained in the NIST National Vulnerability Database, and shows how data on vulnerability patches was collected by the author to support this study. The results of the analysis suggest that it is not the particular software development style that determines patching behavior, but rather the policy of the particular software vendor.
Supplemental Material.docx
Creators: name: Chalvon-Demersay, Tristan
name: Moro, Joanna
name: Gaudichon, Claire
name: Even, Patrick Christian
name: Khodorova, Nadezda
name: Piedcoq, Julien
name: Benoit Viollet
name: Averous, Julien
name: Anne-Catherine Maurin
name: Tomé, Daniel
name: Foretz, Marc
name: Fafournoux, Pierre
name: Azzout-Marniche, Dalila
Publisher: name: figshare
Year: 2020
Subjects: subject: Physiology
subject: FOS: Biological sciences
subject: 60111 Signal Transduction
subject: Molecular Biology

description: Supplemental material "Protein synthesis rate during the postprandial period is modulated by dietary protein intake but does not involve the liver kinases AMPK and GCN2",E-00604-2020, to the American Journal of Physiology-Endocrinology and Metabolism.
Elektronische Wahlen: Verifizierung vs. Zertifizierung
Creators: name: Volkamer, Melanie
name: Schryen, Guido
name: Langer, Lucie
name: Schmidt, Axel
name: Buchmann, Johannes
Publisher: name: Universität Regensburg
Year: 2009
Subjects: subject: 330 Wirtschaft
subject: 000 Allgemeines, Wissenschaft

description: Der Beitrag diskutiert die kontroversen Ansätze – Verifizierung versus Evaluation/Zertifizierung – zur Sicherung elektronischer Wahlen mit Wahlgeräten. Dabei spielt das Urteils des Bundesverfassungsgerichts [BVG099] eine zentrale Rolle. Hierin wird entschieden, dass die Zertifizierung des Wahlgerätes nicht ausreicht und es werden Verifizierungsfunktionen gefordert, die den Wählern die Möglichkeit geben sich von der Integrität des Wahlergebnisses zu überzeugen. Der Beitrag zeigt auf, dass auch mit der Implementierung entsprechender Verifizierungsfunktionen nicht auf Zertifizierung verzichtet werden kann, da an ein Wahlgerät auch andere Anforderungen wie etwa hinsichtlich des Wahlgeheimnisses gestellt werden. Es wird außerdem die Frage diskutiert, warum der Zertifizierung hinsichtlich dieser zusätzlichen Anforderungen vertraut werden kann, während dies nicht der Fall bei der Integritätsanforderung ist.
Increasing software security through open source or closed source development? Empirics suggest that we have asked the wrong question
Creators: name: Schryen, Guido
name: Eliot, Rich
Publisher: name: Universität Regensburg
Year: 2010
Subjects: subject: 330 Wirtschaft
subject: 000 Allgemeines, Wissenschaft

description: While many theoretical arguments against or in favor of open source and closed source software development have been presented, the empirical basis for the assessment of arguments and the development of models is still weak. Addressing this research gap, this paper presents the first comprehensive empirical investigation of published vulnerabilities and patches of 17 widely deployed open source and closed source software packages, including operating systems, database systems, web browsers, email clients, and office systems. The empirical analysis uses comprehensive vulnerability data contained in the NIST National Vulnerability Database and a newly compiled data set of vulnerability patches. The results suggest that it is not the particular software development style that determines the severity of vulnerabilities and vendors’ patching behavior, but rather the specific application type and the policy of the particular development community, respectively.
Searching for pairing energies in phase space
Creators: name: Calixto, M.
name: Castaños, O.
name: Romera, E.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: Superconductivity (cond-mat.supr-con)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We obtain a representation of pairing energies in phase space, for the Lipkin-Meshkov-Glick and general boson Bardeen-Cooper-Schrieffer pairing models. This is done by means of a probability distribution of the quantum state in phase space. In fact, we prove a correspondence between the points at which this probability distribution vanishes and the pairing energies. In principle, the vanishing of this probability distribution is experimentally accessible and additionally gives a method to visualize pairing energies across the model control parameter space. This result opens new ways to experimentally approach quantum pairing systems.
description: 5 pages, 4 figures
Mixed Witt rings of algebras with involution
Creators: name: Garrel, Nicolas
Publisher: name: arXiv
Year: 2019
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 11E81, 19G12, 16W10

description: Although there is no natural internal product for hermitian forms over an algebra with involution of the first kind, we describe how to multiply two $\varepsilon$-hermitian forms to obtain a quadratic form over the base field. This allows to define a commutative graded ring structure by taking together bilinear forms and $\varepsilon$-hermitian forms, which we call the mixed Witt ring of an algebra with involution. We also describe a less powerful version of this construction for unitary involutions, which still defines a ring, but with a grading over $\mathbb{Z}$ instead of the Klein group. We first describe a general framework for defining graded rings out of monoidal functors from monoidal categories with strong symmetry properties to categories of modules. We then give a description of such a strongly symmetric category $\mathbf{Br}_h(K,ι)$ which encodes the usual hermitian Morita theory of algebras with involutions over a field $K$. We can therefore apply the general framework to $\mathbf{Br}_h(K,ι)$ and the Witt group functors to define our mixed Witt rings, and derive their basic properties, including explicit formulas for products of diagonal forms in terms of involution trace forms, explicit computations for the case of quaternion algebras, and reciprocity formulas relative to scalar extensions. We intend to describe in future articles further properties of those rings, such as a $λ$-ring structure, and relations with the Milnor conjecture and the theory of signatures of hermitian forms.
description: 37 pages
FLASHForward - A Future-Oriented Wakefield-Accelerator Research and Development Facility at FLASH
Creators: name: Poder, Kristjan
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2018

description: 60th Annual Meeting of the APS Division of Plasma Physics, APS, Portland, USA, 5 Nov 2018 - 9 Nov 2018
Extensions of the quadratic form of the transverse Laplace operator
Creators: name: Bolokhov, T. A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Spectral Theory (math.SP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We review the quadratic form of the Laplace operator in 3 dimensions in spehrical coordinates which acts on the transverse components of vector functions. Operators, acting on the parametrizing functions of one of the transverse components with angular momentum 1 and 2, appear to be fourth order symmetric differential operators with deficiency indices (1,1). We develop self-adjoint extensions of these operators and propose correspondent extensions for the initial quadratic form. The relevant scalar product for the angular momentum 2 differs from the original product in the space of vector functions, but nevertheless it is still local in radial variable.
description: 33 pages
Simulation of DNA damage using Geant4-DNA: an overview of the "molecularDNA" example application
Creators: name: Chatzipapas, Konstantinos P.
name: Tran, Ngoc Hoang
name: Dordevic, Milos
name: Zivkovic, Sara
name: Zein, Sara
name: Shin, Wook Geun
name: Sakata, Dousatsu
name: Lampe, Nathanael
name: Brown, Jeremy M. C.
name: Ristic-Fira, Aleksandra
name: Petrovic, Ivan
name: Kyriakou, Ioanna
name: Emfietzoglou, Dimitris
name: Guatelli, Susanna
name: Incerti, Sébastien
Publisher: name: arXiv
Year: 2022
Subjects: subject: Medical Physics (physics.med-ph)
subject: Biological Physics (physics.bio-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: The scientific community shows a great interest in the study of DNA damage induction, DNA damage repair and the biological effects on cells and cellular systems after exposure to ionizing radiation. Several in-silico methods have been proposed so far to study these mechanisms using Monte Carlo simulations. This study outlines a Geant4-DNA example application, named "molecularDNA", publicly released in the 11.1 version of Geant4 (December 2022). It was developed for novice Geant4 users and requires only a basic understanding of scripting languages to get started. The example currently proposes two different DNA-scale geometries of biological targets, namely "cylinders", and the "human cell". This public version is based on a previous prototype and includes new features such as: the adoption of a new approach for the modeling of the chemical stage (IRT-sync), the use of the Standard DNA Damage (SDD) format to describe radiation-induced DNA damage and upgraded computational tools to estimate DNA damage response. Simulation data in terms of single strand break (SSB) and double strand break (DSB) yields were produced using each of these geometries. The results were compared to the literature, to validate the example, producing less than 5 % difference in all cases.
description: 20 pages, 8 figures
Moment formulas for multi-type continuous state and continuous time branching processes with immigration
Creators: name: Barczy, Matyas
name: Li, Zenghu
name: Pap, Gyula
Publisher: name: arXiv
Year: 2014
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60J80, 60J75, 60H10

description: Recursions for moments of multi-type continuous state and continuous time branching process with immigration are derived. It turns out that the $k$-th (mixed) moments and the $k$-th (mixed) central moments are polynomials of the initial value of the process, and their degree are at most $k$ and $\lfloor k/2 \rfloor$, respectively.
description: 36 pages
Sedimentary Record of Cenozoic Tectonics, Basin Development, and Climate Along the Eastern Margin of the Southern Alaska Convergent Plate Boundary
Creators: name: Allen, Wai Kehadeezbah
Publisher: name: Purdue University Graduate School
Year: 2023
Subjects: Sedimentology
Stratigraphy (incl. biostratigraphy, sequence stratigraphy and basin analysis)
Structural geology and tectonics
Geochronology

description: The northern Pacific plate boundary along the southern Alaska convergent margin is characterized by a west to east transition from normal (Aleutian trench) to flat slab subduction related to ongoing oblique collision of the Yakutat microplate. The deformation along the eastern part of the southern Alaska convergent margin is marked by the eastern Alaska Range inboard of the margin and the Chugach-St. Elias Mountains outboard of the margin. Inboard of the margin, the Denali fault outlines the trace of the eastern Alaska Range.
 New stratigraphic, geochronologic, and provenance analysis from Eocene-Pliocene strike-slip basins along this fault system provides a record of both basin development and displacement amounts. Key findings include post-Eocene displacement of ~ 470 km on the eastern Denali fault, Miocene displacement of 230 km on the ~ Totschunda fault, and Late Miocene to Pliocene displacement of 80-90 km on the Kimball fault section. The strike-slip displacement history for this part of the fault has previously been interpreted as the product of Cretaceous to Eocene deformation. My results, in contrast, document that large components of the displacement along this 2,000-km-long fault system are post-Eocene.
 Outboard of the convergent margin are the Chugach-St. Elias Mountains that are actively being eroded by extensive temperate glaciers that transport sediment directly into the Gulf of Alaska and the Aleutian trench. This natural source-to-sink system allows for investigation of sediment transport and provenance along a glaciated plate boundary. IODP Expedition 341 drilled five sites into the Gulf of Alaska to investigate the interplay between Neogene – Quaternary tectonics and climate from a provenance perspective. The IODP sites transect the continental shelf to distal submarine fan deposystems and encompass a 10 my record of sedimentation above the area of flat-slab subduction.
 New results from U-Pb geochronologic data collected from 17 targeted sand beds and 12 lonestones indicate that the Coast Mountain batholith and the Chugach Metamorphic Complex have been important sources of sediment for depositional systems of the Gulf of Alaska. This sediment is likely reworked along the margin by being incorporated into thrust belts and accretionary prisms, and then are subsequently eroded by glacial processes.
Fontaine-Laffaille modules and strongly divisible modules
Creators: name: Gao, Hui
Publisher: name: arXiv
Year: 2019
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: In this note, we study the relation between Fontaine-Laffaille modules and strongly divisible modules, without assuming the main theorem of Fontaine-Laffaille (but we need to assume the main results concerning strongly divisible modules). This in particular gives a new proof for the main theorem of Fontaine-Laffaille (for $p>2$).
description: Final version. Updated numbering system to match with published version
Practical Security of Large-scale Elections: An Exploratory Case Study of Internet Voting in Estonia
Creators: name: Schryen, Guido
Publisher: name: Universität Regensburg
Year: 2008
Subjects: subject: Internet voting, large-scale election, Estonian parliamen- tary election, security, security management
subject: 330 Wirtschaft
subject: 000 Allgemeines, Wissenschaft

description: The Estonian parliamentary election in 2007 is regarded as a success story of large-scale Internet elections. I use this election in a single case study on practical security to show that low quality of security and its management does not necessarily prevent large-scale Internet elections from being conducted. I also provide research propositions with regard to future challenges for large-scale Internet elections.
Written in The Rock: Engaging Student Organizations at Slippery Rock University
Creators: name: Brunner, Amy
Publisher: name: Digital Repository at the University of Maryland
Year: 2017
Subjects: Archives -- Public relations
Slippery Rock University of Pennsylvania
Public history
Universities and colleges--Archives
HIST 343
Posters
Student organizations

description: The University Archives at Slippery Rock University of Pennsylvania documents the university's functions and activities over time. Because the Archives depends on organizations and departments to deposit their materials, the Student Organizations record group contained several noticeable gaps in activity. This poster summarizes efforts to create awareness of the University Archives among student organizations and solicit deposits for research use.
Dynamic modulation of thermal emission -- a Tutorial
Creators: name: Picardi, Michela Florinda
name: Nimje, Kartika Narayan
name: Papadakis, Georgia T.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Thermal emission is typically associated with a blackbody at a temperature above absolute zero, which exchanges energy with its environment in the form of radiation. Blackbody thermal emission is largely incoherent both spatially and temporally. Using principles in nanophotonics, thermal emission with characteristics that differ considerably from those of a blackbody have been demonstrated. In particular, by leveraging intrinsic properties of emerging materials or via nanostructuring at the wavelength or sub-wavelength scale, one can gain control over the directionality, temporal coherence, and other more exotic properties of thermal radiation. Typically, however, these are fixed at the time of fabrication. Gaining dynamic control of thermal emission requires exploiting external mechanisms that actively modulate radiative properties. Numerous applications can benefit from such thermal emission control, for example in solar energy harvesting, thermo-photovoltaic energy conversion, radiative cooling, sensing, spectroscopy, imaging and thermal camouflage. In this tutorial, we introduce thermal emission in two domains: the far-field, and the near-field, and we outline experimental approaches for probing thermal radiation in both ranges. We discuss ways for tailoring the spatial and temporal coherence of thermal emission and present available mechanisms to actively tune these characteristics.
description: 19 pages, 14 figures, tutorial
Status of Material Load Experiments at MAMI in Mainz
Creators: name: Ushakov, Andriy
name: Riemann, Sabine
name: Alharbi, Khaled
name: Moortgat-Pick, Gudrid
name: Aulenbacher, Kurt
name: Heidrich, Steffen
name: Heil, Philipp
name: Tmashevich, Yegor
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2018

description: International Workshop on Future Linear Colliders, LCWS2018, Arlington (Texas), USA, 22 Oct 2018 - 26 Oct 2018
Thermodynamics of Towers of Hyperbolic Type
Creators: name: Pesin, Yakov
name: Senti, Samuel
name: Zhang, Ke
Publisher: name: arXiv
Year: 2014
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37D25, 37D35, 37E30, 37E35

description: We introduce a class of continuous maps $f$ of a compact topological space $X$ admitting inducing schemes of hyperbolic type and describe the associated tower constructions. We then establish a thermodynamic formalism, i.e., we describe a class of real-valued potential functions $φ$ on $X$ such that $f$ possess a unique equilibrium measure $μ_φ$, associated to each $φ$, which minimizes the free energy among the measures that are liftable to the tower. We also describe some ergodic properties of equilibrium measures including decay of correlations and the central limit theorem. We then study the liftability problem and show that under some additional assumptions on the inducing scheme every measure that charges the base of the tower and has sufficiently large entropy is liftable. Our results extend those obtained in [PS05, PS08] for inducing schemes of expanding types and apply to certain multidimensional maps. Applications include obtaining the thermodynamic formalism for Young's diffeomorphisms, the Hénon family at the first birfucation and the Katok map. In particular for the Katok map we obtain the exponential decay of correlations for equilibrium measures associated to the geometric potentials with $0\le t<1$.
description: 42 pages, 1 figure. To appear in Trans. Amer. Math. Soc
Security of open source and closed source software: An empirical comparison of published vulnerabilities
Creators: name: Schryen, Guido
Publisher: name: Universität Regensburg
Year: 2009
Subjects: subject: Vulnerabilities, security, open source software, closed source software, empirical comparison
subject: 330 Wirtschaft
subject: 000 Allgemeines, Wissenschaft

description: Reviewing literature on open source and closed source security reveals that the discussion is often determined by biased attitudes toward one of these development styles. The discussion specifically lacks appropriate metrics, methodology and hard data. This paper contributes to solving this problem by analyzing and comparing published vulnerabilities of eight open source software and nine closed source software packages, all of which are widely deployed. Thereby, it provides an extensive empirical analysis of vulnerabilities in terms of mean time between vulnerability disclosures, the development of disclosure over time, and the severity of vulnerabilities, and allows for validating models provided in the literature. The investigation reveals that (a) the mean time between vulnerability disclosures was lower for open source software in half of the cases, while the other cases show no differences, (b) in contrast to literature assumption, 14 out of 17 software packages showed a significant linear or piecewise linear correlation between time and the number of published vulnerabilities, and (c) regarding the severity of vulnerabilities, no significant differences were found between open source and closed source.
Open Source vs. Closed Source Software: Towards Measuring Security
Creators: name: Schryen, Guido
name: Kadura, Rouven
Publisher: name: Universität Regensburg
Year: 2009
Subjects: subject: Open source software, Closed source software, Security, Metrics
subject: 330 Wirtschaft
subject: 000 Allgemeines, Wissenschaft

description: The increasing availability and deployment of open source software in personal and commercial environments makes open source software highly appealing for hackers, and others who are interested in exploiting software vulnerabilities. This deployment has resulted in a debate “full of religion” on the security of open source software compared to that of closed source software. However, beyond such arguments, only little quantitative analysis on this research issue has taken place. We discuss the state-of-the-art of the security debate and identify shortcomings. Based on these, we propose new metrics, which allows to answer the question to what extent the review process of open source and closed source development has helped to fix vulnerabilities. We illustrate the application of some of these metrics in a case study on OpenOffice (open source software) vs. Microsoft Office (closed source software).
Selecting A Second Site for Prince George’s County Animal Shelter
Creators: name: Flom, Karin
name: Ingerson, Sarah
name: Rhoads, Sofie
name: Linden Weller, Anna
Publisher: name: Partnership for Action Learning in Sustainability (PALS)
Year: 2017
Subjects: National Center for Smart Growth
PALS
Sustainability
Maryland
Planning
Prince George's County
GIS

description: Final project for URSP688L: Planning Technologies (Fall 2017). University of Maryland, College Park.
description: Our PALS project team worked with Prince George’s County Animal Control to identify potential sites for a second animal shelter. After reading a 2016 feasibility study and meeting with Chief Rodney Taylor and other stakeholders, our team developed a hierarchy of site selection criteria. These included zoning, parcel size, transit access, and more. We then utilized GIS mapping and data analysis to draft a short list of approximately 30 possible sites. After this, we went through the options and eliminated any sites with prohibitive topography or accessibility issues. In the end, we were left with four potential sites. We presented these four options to the county on December 14, 2017. At this meeting, we also discussed potential research opportunities for the second semester of this project.
UI / UX Proposal for the Montgomery County Department of Health and Human Services
Creators: name: Appiah, Stephan
name: Benites, Pierre
name: Chang, Ryan
name: Geleg, Tashi
Publisher: name: Partnership for Action Learning in Sustainability (PALS)
Year: 2018
Subjects: National Center for Smart Growth
PALS
Sustainability
Maryland
Montgomery County
Information Science
Information Management

description: Final project for INST490 (Spring 2018). University of Maryland, College Park.
description: Montgomery County’s Department of Human Health and Services (DHHS) is the county’s largest government agency and is responsible for public health and human services that help address the needs of the community’s most vulnerable children, adults, and seniors. DHHS delivers services at more than 20 locations in Montgomery County and has over 130 direct service programs. Any organization of this size would face difficulty in managing its performance metrics, especially without using updated technology. Montgomery County DHHS faces this exact dilemma as it collects metrics from over 700 providers across 130 service programs without any central or standardized management system. Metrics are currently reported to their respective directors and administrators via mail; an outdated method that makes organizing difficult, especially for a director overseeing a large program with many different metrics to assess. Noune Sekhpossian is a program manager within the DHHS Planning, Accountability, and Customer Service (PACS) whose responsibilities include “developing and refining DHHS program and system measures, consulting and capacity building on appropriate performance metrics for service areas, programs, grants, etc., and leveraging advanced integrated technology, data systems and innovative analytical tools.” She represented the DHHS as our client and was our primary contact while we developed the interface.
Self-biased Reconfigurable Graphene Stacks for Terahertz Plasmonics
Creators: name: Gomez-Diaz, J. S.
name: Moldovan, C.
name: Capdevilla, S.
name: Romeu, J.
name: Bernard, L. S.
name: Magrez, A.
name: Ionescu, A. M.
name: Perruisseau-Carrier, J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The gate-controllable complex conductivity of graphene offers unprecedented opportunities for reconfigurable plasmonics at THz and mid-IR frequencies. However, the requirement of a gating electrode close to graphene and the single `control knob' that this approach offers for graphene conductivity limits the practical implementation and performance of graphene-controllable plasmonic devices. Herein, we report on graphene stacks composed of two or more graphene monolayers separated by electrically thin dielectrics and present a simple and rigorous theoretical framework for their characterization. In a first implementation, two graphene layers gate each other, thereby behaving as a controllable single equivalent layer but without any additional gating structure. Second, we show that adding an additional gate --a third graphene layer or an external gate-- allows independent control of the complex conductivity of each layer within the stack and hence provides enhanced control on the stack equivalent complex conductivity. The proposed concepts are first theoretically studied and then demonstrated experimentally via a detailed procedure allowing extraction of the parameters of each layer independently and for arbitrary pre-doping. These results are believed to be instrumental to the development of THz and mid-IR plasmonic devices with enhanced performance and reconfiguration capabilities.
description: 14 pages, 14 figures
Fast Scrambling of mutual information in Kerr-AdS$_{\textbf{5}}$
Creators: name: Malvimat, Vinay
name: Poojary, Rohan R.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We compute the disruption of mutual information in a TFD state dual to a Kerr black hole with equal angular momenta in $AdS_5$ due to an equatorial shockwave. The shockwave respects the axi-symmetry of the Kerr geometry with specific angular momenta $\mathcal{L}_{ϕ_1}$ & $\mathcal{L}_{ϕ_2}$. The sub-systems considered are hemispheres in the $left$ and the $right$ dual CFTs with the equator of the $S^3$ as their boundary. We compute the change in the mutual information by determining the growth of the HRT surface at late times. We find that at late times leading upto the scrambling time the minimum value of the instantaneous Lyapunov index $λ_L^{(min)}$ is bounded by $κ=\frac{2πT_H}{(1-μ\,\mathcal{L}_+)}$ and is found to be greater than $2πT_H$ in certain regimes with $T_H$ and $μ$ denoting the black hole's temperature and the horizon angular velocity respectively while $\mathcal{L}_+=\mathcal{L}_{ϕ_1}+\mathcal{L}_{ϕ_2}$. We also find that for non-extremal geometries the null perturbation obeys $\mathcal{L}_+<μ^{-1}$ for it to reach the outer horizon from the $AdS$ boundary. The scrambling time at very late times is given by $κτ_*\approx\log \mathcal{S}$ where $\mathcal{S}$ is the Kerr entropy. We also find that the onset of scrambling is delayed due to a term proportional to $\log(1-μ\,\mathcal{L}_+)^{-1}$ which is not extensive and does not scale with the entropy of Kerr black hole.
description: published version
Performance Metrics Plan for the Montgomery County Department of Health and Human Services
Creators: name: Bool, Richard
name: Bruffey, Robert
name: Falak, Waleed
Publisher: name: Partnership for Action Learning in Sustainability (PALS)
Year: 2018
Subjects: National Center for Smart Growth
PALS
Sustainability
Maryland
Montgomery County
Information Science
Information Management

description: Final project for INST490 (Spring 2018). University of Maryland, College Park.
description: DHHS found that they were inefficiently recording data used to create their necessary reports. With more than 130 direct service programs and contracted services from 700 different providers, the data from those services weren’t always properly recorded. For example, data for some reports, such as the Monthly Trend Reports (MTRs), was recorded and tracked on both spreadsheets or paper reports. This variation causes inefficiency in creating reports; it took longer than necessary. After learning about and examining the data contained in several DHHS reports, we realized one way to help DHHS employees correctly record information would be to provide them with a data dictionary. A data dictionary allows users to quickly find different service programs and attributes recorded throughout DHHS, including items such as variable name, variable description, data type, and more. Furthermore, the data reports were all in a static formatting, meaning that the information could not be edited or updated. As a result, we decided to take all the data in those reports and import them into a database that could then be used to input, update, edit, or report information.
A hypergeometric basis for the Alpert multiresolution analysis
Creators: name: Geronimo, Jeffrey S.
name: Iliev, Plamen
Publisher: name: arXiv
Year: 2014
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Functional Analysis (math.FA)
subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: We construct an explicit orthonormal basis of piecewise ${}_{i+1}F_{i}$ hypergeometric polynomials for the Alpert multiresolution analysis. The Fourier transform of each basis function is written in terms of ${}_2F_3$ hypergeometric functions. Moreover, the entries in the matrix equation connecting the wavelets with the scaling functions are shown to be balanced ${}_4 F_3$ hypergeometric functions evaluated at $1$, which allows to compute them recursively via three-term recurrence relations. The above results lead to a variety of new interesting identities and orthogonality relations reminiscent to classical identities of higher-order hypergeometric functions and orthogonality relations of Wigner $6j$-symbols.
Larangan Pernikahan Semarga di Suku Karo
Creators: name: Sembiring, Al Nayla
Publisher: name: Zenodo
Year: 2024

description: Dalam pernikahan masyarakat suku Karo memiliki aturan dan norma yang sangat kuat, terutama terkait dengan sistem kekerabatan yang berbasis pada marga. Tradisi ini mengatur interaksi sosial dan hubungan keluarga, dengan larangan menikah antar marga untuk menjaga keutuhan struktur sosial. Namun, dalam beberapa dekade terakhir, fenomena pernikahan sesama marga semakin marak terjadi, dipicu oleh berbagai faktor, seperti globalisasi, pergeseran nilai, dan mobilitas sosial.

Pernikahan sesama marga menimbulkan berbagai implikasi terhadap sistem kekerabatan yang telah mapan. Dampak yang ditimbulkan tidak hanya memengaruhi hubungan antar individu, tetapi juga memengaruhi dinamika sosial dalam komunitas. Munculnya pernikahan ini dapat menyebabkan ambiguitas dalam hubungan kekerabatan, konflik warisan, dan perubahan dalam pola interaksi sosial.
System Architecture for the Montgomery County Department of Health and Human Services
Creators: name: Saba, Azeez
name: Falak, Waleed
name: Mulli, Anna
name: Pham, Andrew
Publisher: name: Partnership for Action Learning in Sustainability (PALS)
Year: 2018
Subjects: National Center for Smart Growth
PALS
Sustainability
Maryland
Montgomery County
Information Science
Information Management

description: Final project for INST490 (Spring 2018). University of Maryland, College Park.
description: This design-oriented, community service project has the potential to improve productivity in Montgomery County's Department of Health and Human Services (DHHS) by providing a central standardized management system. The project goal is to evaluate and assess existing cloudbased data storage systems for a future developer to implement. Client: Noune Sekhpossian, Noune.Sekhpossian@montgomerycountymd.gov DHHS collects ongoing data to regulate whether its programs are following through with actions and results. It is important to frontline staff and to their managers, administrators, commissions, and elected officials. DHHS collects numerous metrics from its more than 130 direct service programs and its 700 contracted service providers. To improve productivity of DHHS staff, the team will design a way to more easily access and track performance measures and reports. The new system will be a cloud-based storage system that is archivable and compatible with industry-standard browsers. This storage system will provide adequate security and tools to perform any analysis or filtering DHHS may need. The proposed project will include an evaluation and assessment of existing cloud-based data storage systems that a future developer (e.g., MIM capstone students) will use as a first step in implementing the cloud-based system. The final document will be one component of a system synthesis that will include comprehensive cloud-based data storage, as well as user interface (UI) and business intelligence (BI) solutions for DHHS performance metrics.
Growth Tight Actions of Product Groups
Creators: name: Cashen, Christopher H.
name: Tao, Jing
Publisher: name: arXiv
Year: 2014
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20F67, 20F65, 37C35

description: A group action on a metric space is called growth tight if the exponential growth rate of the group with respect to the induced pseudo-metric is strictly greater than that of its quotients. A prototypical example is the action of a free group on its Cayley graph with respect to a free generating set. More generally, with Arzhantseva we have shown that group actions with strongly contracting elements are growth tight. Examples of non-growth tight actions are product groups acting on the $L^1$ products of Cayley graphs of the factors. In this paper we consider actions of product groups on product spaces, where each factor group acts with a strongly contracting element on its respective factor space. We show that this action is growth tight with respect to the $L^p$ metric on the product space, for all $1
description: 13 pages v2 15 pages, minor changes, to appear in Groups, Geometry, and Dynamics
Disentangling interacting dark energy cosmologies with the three-point correlation function
Creators: name: Moresco, Michele
name: Marulli, Federico
name: Baldi, Marco
name: Moscardini, Lauro
name: Cimatti, Andrea
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We investigate the possibility of constraining coupled dark energy (cDE) cosmologies using the three-point correlation function (3PCF). Making use of the CoDECS N-body simulations, we study the statistical properties of cold dark matter (CDM) haloes for a variety of models, including a fiducial $Λ$CDM scenario and five models in which dark energy (DE) and CDM mutually interact. We measure both the halo 3PCF, $ζ(θ)$, and the reduced 3PCF, $Q(θ)$, at different scales ($2
description: 13 pages, 11 figures. Accepted for publication in MNRAS
Dual-distribution discrepancy with self-supervised refinement for anomaly detection in medical images
Creators: name: Cai, Yu
name: Chen, Hao
name: Yang, Xin
name: Zhou, Yu
name: Cheng, Kwang-Ting
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Medical anomaly detection is a crucial yet challenging task aimed at recognizing abnormal images to assist in diagnosis. Due to the high-cost annotations of abnormal images, most methods utilize only known normal images during training and identify samples deviating from the normal profile as anomalies in the testing phase. Many readily available unlabeled images containing anomalies are thus ignored in the training phase, restricting the performance. To solve this problem, we introduce one-class semi-supervised learning (OC-SSL) to utilize known normal and unlabeled images for training, and propose Dual-distribution Discrepancy for Anomaly Detection (DDAD) based on this setting. Ensembles of reconstruction networks are designed to model the distribution of normal images and the distribution of both normal and unlabeled images, deriving the normative distribution module (NDM) and unknown distribution module (UDM). Subsequently, the intra-discrepancy of NDM and inter-discrepancy between the two modules are designed as anomaly scores. Furthermore, we propose a new perspective on self-supervised learning, which is designed to refine the anomaly scores rather than detect anomalies directly. Five medical datasets, including chest X-rays, brain MRIs and retinal fundus images, are organized as benchmarks for evaluation. Experiments on these benchmarks comprehensively compare a wide range of anomaly detection methods and demonstrate that our method achieves significant gains and outperforms the state-of-the-art. Code and organized benchmarks are available at https://github.com/caiyu6666/DDAD-ASR.
description: Accepted to Medical Image Analysis, 2023
Existence of Compactly Supported Global Minimisers for the Interaction Energy
Creators: name: Cañizo, J. A.
name: Carrillo, J. A.
name: Patacchini, F. S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: The existence of compactly supported global minimisers for continuum models of particles interacting through a potential is shown under almost optimal hypotheses. The main assumption on the potential is that it is catastrophic, or not H-stable, which is the complementary assumption to that in classical results on thermodynamic limits in statistical mechanics. The proof is based on a uniform control on the local mass around each point of the support of a global minimiser, together with an estimate on the size of the "gaps" it may have. The class of potentials for which we prove existence of global minimisers includes power-law potentials and, for some range of parameters, Morse potentials, widely used in applications. We also show that the support of local minimisers is compact under suitable assumptions.
description: Final version after referee reports taken into account