cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A search for new dwarf galaxies outside the nearby groups
Creators: name: Karachentsev, I. D.
name: Karachentseva, V. E.
name: Kaisin, S. S.
name: Kaisina, E. I.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We undertook a search for new nearby dwarf galaxies outside the known groups in the Local Volume using the data on DESI Legacy Imaging Surveys. In a wide sky area of $\sim$5000 square degrees directed toward the Local Void, we found only 12 candidates to nearby low mass galaxies. Almost all of them are classified as irregular or transition type dwarfs. Additionally, we examined areas of the sky exposed with the Hyper Suprime Camera of the Subaru telescope ($\sim$700 square degrees) and found nine more candidates to nearby dwarfs. Finally, nine candidates to the Local Volume were selected by us from the Zaritsky's SMUDG catalog that contains 7070 ultra-diffuse objects automatically detected in the whole area of the DESI surveys. We estimated a fraction of quiescent dSph galaxies in the general cosmic field to be less than 10 percent.
description: 9 pages, 4 figures, 4 tables. accepted to Astrophysics
Distributing long-distance trust in optomechanics
Creators: name: Qars, Jamal El
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum steering displays an inherent asymmetric property that differs from entanglement and Bell nonlocality. Besides being of fundamental interest, steering is relevant to many asymmetric quantum information tasks. Here, we propose a scheme to generate and manipulate Gaussian quantum steering between two spatially distant mechanical modes of two optomechanical cavities coupled via an optical fiber, and driven by blue detuned lasers. In the unresolved sideband regime, we show, under realistic experimental conditions, that strong asymmetric steering can be generated between the two considered modes. Also, we show that one-way steering can be achieved and practically manipulated through the lasers drive powers and the temperatures of the cavities. Further, we reveal that the direction of one-way steering depends on the sign of the difference between the energies of the mechanical modes. Finally, we discuss how to access the generated steering. This work opens up new perspectives for the distribution of long-distance trust which is of great interest in secure quantum communication.
Analysis of Mission and Design Concepts for a Logistic Ship
Creators: name: Frisch, Franz A.P.
name: Weir, W. Donald
name: Frisch, Franz A.P.
name: Weir, W. Donald
Publisher: name: Unknown
Year: 1966
Subjects: Public Economics

description: Presented at the 7th Transportation Research Forum meeting, Dec. 27-29, 1966, San Francisco, CA
Variability of thujone content in essential oil due to plant development and organs from Artemisia absinthium L. and Salvia officinalis L.
Creators: name: Nguyen, Huong Thi
name: Radácsi, Péter
name: Rajhárt, Péter
name: Németh, Éva Zámboriné
Publisher: name: Journal of Applied Botany and Food Quality
Year: 2019

description: The study compared changes in essential oil content and its thujone ratio in two popular herbs (Artemisia absinthium L. and Salvia officinalis L.), pertaining to plant development and plant organs. Both species were harvested in 2018 at the vegetative, floral budding, flowering and after flowering phases; flowers and leaves were sampled separately. The essential content is always higher in the flowers than in the leaves at the same phenophase in both species we examined. Decreased essential oil content in both organs during the developmental phases was also common to both species. In S. officinalis, both leaf and flower oils showed quantitatively different compositional profiles. During plant development, the main component α-thujone decreased significantly in leaf oils, while both thujone isomers demonstrated statistically stable values in flower oils. In A. absinthium, leaf and flower oils exhibited similar thujone ratios. During plant development, neither of the thujone isomers changed significantly in leaf oils but the ratio of α-thujone increased in the flowers. It was established, that only the distribution and dynamics of total volatiles showed common features in the two species, while the variability of thujone ratios represents differences specific to each target species. For the praxis, in S. officinalis timing of harvest seems to be more important while in A. absinthium the ratio of organs may play a more significant role in reaching lower thujone levels of the drug.
description: Journal of Applied Botany and Food Quality, Vol 92 (2019): Journal of Applied Botany and Food Quality
Hidden Variables in Bipartite Networks
Creators: name: Kitsak, Maksim
name: Krioukov, Dmitri
Publisher: name: arXiv
Year: 2011
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Social and Information Networks (cs.SI)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We introduce and study random bipartite networks with hidden variables. Nodes in these networks are characterized by hidden variables which control the appearance of links between node pairs. We derive analytic expressions for the degree distribution, degree correlations, the distribution of the number of common neighbors, and the bipartite clustering coefficient in these networks. We also establish the relationship between degrees of nodes in original bipartite networks and in their unipartite projections. We further demonstrate how hidden variable formalism can be applied to analyze topological properties of networks in certain bipartite network models, and verify our analytical results in numerical simulations.
A cell-based assessment of the muscle anabolic potential of blue whiting (micromesistius poutassou) protein hydrolysates
Creators: name: Shekoohi, Niloofar
name: Amigo Benavent, Miryam
name: Wesley Peixoto da Fonseca, Guilherme
name: HARNEDY, PADRAIGIN
name: FITZGERALD, RICHARD
name: CARSON, BRIAN
Publisher: name: University of Limerick
Year: 2023
Subjects: subject: Biological sciences
subject: FOS: Biological sciences
subject: Health sciences
subject: FOS: Health sciences

description: Blue whiting (BW) represents an underutilised fish species containing a high-quality protein and amino acid (AA) profile with numerous potentially bioactive peptide sequences, making BW an economic and sustainable alternative source of protein. This study investigated the impact of three different BW protein hydrolysates (BWPH-X, Y and Z) on growth, proliferation and muscle protein synthesis (MPS) in skeletal muscle (C2C12) myotubes. BWPHs were hydrolysed using different enzymatic and heat exposures and underwent simulated gastrointestinal digestion (SGID), each resulting in a high degree of hydrolysis (33.41–37.29%) and high quantities of low molecular mass peptides (86.17–97.12% <1 kDa). C2C12 myotubes were treated with 1 mg protein equivalent/mL of SGID-BWPHs for 4 h. Muscle growth and myotube thickness were analysed using an xCelligence™ platform. Anabolic signalling (phosphorylation of mTOR, rpS6 and 4E-BP1) and MPS measured by puromycin incorporation were assessed using immunoblotting. BWPH-X significantly increased muscle growth (p < 0.01) and myotube thickness (p < 0.0001) compared to the negative control (amino acid and serum free media). Muscle protein synthesis (MPS), as measured by puromycin incorporation, was significantly higher after incubation with BWPH-X compared with the negative control, but did not significantly change in response to BWPH-Y and Z treatments. Taken together, these preliminary findings demonstrate the anabolic potential of some but not all BWPHs on muscle enhancement, thus providing justification for human dietary intervention studies to confirm and translate the results of such investigations to dietary recommendations and practices.
Bosonic Dynamical Mean-Field Theory
Creators: name: Snoek, Michiel
name: Hofstetter, Walter
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We derive the Bosonic Dynamical Mean-Field equations for bosonic atoms in optical lattices with arbitrary lattice geometry. The equations are presented as a systematic expansion in 1/z, z being the number of lattice neighbors. Hence the theory is applicable in sufficiently high dimensional lattices. We apply the method to a two-component mixture, for which a rich phase diagram with spin-order is revealed.
description: Unedited version of chapter in Quantum Gases: Finite Temperature and Non-Equilibrium Dynamics (Vol. 1 Cold Atoms Series). N.P. Proukakis, S.A. Gardiner, M.J. Davis and M.H. Szymanska, eds. (Imperial College Press, London, 2013). See http://www.icpress.co.uk/physics/p817.html
A Critique of Government Ownership & Operation of Surface Media in Brazil
Creators: name: Miller, Clarence J.
name: Felton, John R.
name: Miller, Clarence J.
name: Felton, John R.
Publisher: name: Unknown
Year: 1966
Subjects: Public Economics

description: Presented at the 7th Transportation Research Forum meeting, Dec. 27-29, 1966, San Francisco, CA
One Electron Atom in Special Relativity with de Sitter Space-Time Symmetry
Creators: name: Yan, Mu-Lin
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: The de Sitter invariant Special Relativity (dS-SR) is a SR with constant curvature, and a natural extension of usual Einstein SR (E-SR). In this paper, we solved the dS-SR Dirac equation of Hydrogen by means of the adiabatic approach and the quasi-stationary perturbation calculations of QM. Hydrogen atoms are located on the light cone of the Universe. FRW metric and $Λ$CDM cosmological model are used to discuss this issue. To the atom, effects of de Sitter space-time geometry described by Beltrami metric are taken into account. The dS-SR Dirac equation turns out to be a time dependent quantum Hamiltonian system. We revealed that: 1,The fundamental physics constants $m_e,\;\hbar,\;e$ variate adiabatically along with cosmologic time in dS-SR QM framework. But the fine-structure constant $α\equiv e^2/(\hbar c)$ keeps to be invariant; 2,$(2s^{1/2}-2p^{1/2})$-splitting due to dS-SR QM effects: By means of perturbation theory, that splitting $ΔE(z)$ were calculated analytically, which belongs to $\mathcal{O}(1/R^2)$-physics of dS-SR QM. Numerically, we found that when $|R|\simeq \{10^3 Gly,\;10^4 Gly,\;10^5 Gly\;\}$, and $z\simeq \{1,\;{\rm or}\;2\}$, the $ΔE(z)>> 1{\rm (Lamb\; shift)}$. This indicate that for these cases the hyperfine structure effects due to QED could be ignored, and the dS-SR fine structure effects are dominant. This effect could be used to determine the universal constant $R$ in dS-SR, and be thought as a new physics beyond E-SR.
description: 37 pages, 6 figures. arXiv admin note: substantial text overlap with arXiv:0909.4829
Longitudinal Losses Due to Breathing Mode Excitation in Radiofrequency Linear Accelerators
Creators: name: Channell, Paul J.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: Transverse breathing mode oscillations in a particle beam can couple energy into longitudinal oscillations in a bunch of finite length and cause significant losses. We develop a model that illustrates this effect and explore the dependence on mismatch size, space-charge tune depression, longitudinal focusing strength, bunch length, and RF bucket length.
Low-rank Matrix Recovery from Errors and Erasures
Creators: name: Chen, Yudong
name: Jalali, Ali
name: Sanghavi, Sujay
name: Caramanis, Constantine
Publisher: name: arXiv
Year: 2011
Subjects: subject: Information Theory (cs.IT)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: This paper considers the recovery of a low-rank matrix from an observed version that simultaneously contains both (a) erasures: most entries are not observed, and (b) errors: values at a constant fraction of (unknown) locations are arbitrarily corrupted. We provide a new unified performance guarantee on when the natural convex relaxation of minimizing rank plus support succeeds in exact recovery. Our result allows for the simultaneous presence of random and deterministic components in both the error and erasure patterns. On the one hand, corollaries obtained by specializing this one single result in different ways recover (up to poly-log factors) all the existing works in matrix completion, and sparse and low-rank matrix recovery. On the other hand, our results also provide the first guarantees for (a) recovery when we observe a vanishing fraction of entries of a corrupted matrix, and (b) deterministic matrix completion.
description: 27 pages, 3 figures. Appeared in ISIT 2011
Diffusionseigenschaften von Nickel in einer Festoxid-Brennstoffzelle
Creators: name: Haremski, Patricia
Publisher: name: Karlsruher Institut für Technologie (KIT)
Year: 2021
Subjects: Nickel
Diffusion
Festoxid-Brennstoffzelle
SOFC
solid oxide fuel cell
Korngrenzenergie
Oberflächendiffusion
Thermal Grooving
AFM

description: Die Nickel-Kornvergröberung ist einer der dominantesten Degradationsmechanismen in der Festoxid-Brennstoffzelle (SOFC). Um diesen Mechanismus quantitativ korrekt in Simulationen zu modellieren und Langzeitvorhersagen zur Degradation geben zu können, sind zuverlässige Materialparameter unter Betriebsbedingungen erforderlich. Dabei sind die relativen Korngrenzenergien und die Diffusionskoeffizienten von Nickel von besonderem Interesse. In der vorliegenden Arbeit wurden Thermal Grooving Experimente an Anodenmikrostrukturen, Ni-Polykristallen sowie Ni-Bikristallen durchgeführt und die resultierenden Korngrenzfurchen mittels eines Rasterkraftmikroskops (AFM) vermessen. Da die geometrische Form der Furchen entscheidend für die weitere Auswertung und somit für die Bestimmung der Materialparameter war, wurde in dieser Arbeit die Messmethodik des AFM optimiert. Desweiteren wurden in Vorversuchen verschiedene Ansätze zur materialographischen Präparation der Bikristalle getestet, damit eine optimal präparierte Oberfläche als Ausgangslage für die Mullins Theorie des Thermal Grooving genutzt werden konnte. Die Ionenstrahl-Querschnittspolitur erfüllte als einzige Methode alle Kriterien an die präparierte Oberfläche. Im ersten experimentellen Teil der Arbeit wurden die Dihedralwinkel der Ni-Furchen in Anodenmikrostrukturen und Ni-Polykristallen vermessen, um die relativen Korngrenzenergien zu bestimmen. Im zweiten experimentellen Teil wurde das komplette Furchenprofil von Ni-Bikristallen vermessen, um die Diffusionskoeffizienten zu bestimmen. In Kombination mit der optimierten Probenpräparation und Messmethodik konnte mithilfe des Thermal Grooving eine hohe Genauigkeit bei der Bestimmung der relativen Korngrenzenergien und Diffusionskoeffizienten erzielt werden. Zudem konnte Oberflächendiffusion eindeutig als dominanter Diffusionsmechanismus identifiziert werden. Die Ergebnisse in dieser Arbeit liefern erstmals zuverlässige Werte sowie die komplette Anisotropie der relevanten Materialparameter von Nickel unter realitätsnahen Betriebsbedingungen einer SOFC-Anode.
Local spinfoam expansion in loop quantum cosmology
Creators: name: Henderson, Adam
name: Rovelli, Carlo
name: Vidotto, Francesca
name: Wilson-Ewing, Edward
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The quantum dynamics of the flat Friedmann-Lemaitre-Robertson-Walker and Bianchi I models defined by loop quantum cosmology have recently been translated into a spinfoam-like formalism. The construction is facilitated by the presence of a massless scalar field which is used as an internal clock. The implicit integration over the matter variable leads to a nonlocal spinfoam amplitude. In this paper we consider a vacuum Bianchi I universe and show that by choosing an appropriate regulator a spinfoam expansion can be obtained without selecting a clock variable and that the resulting spinfoam amplitude is local.
description: 12 pages
Improving data acquisition from 3-D microtissues in image-based cancer drug screening
Creators: name: Nasseri, Sayyed Soroush
Publisher: name: University of British Columbia
Year: 2023

description: Cell-based drug screenings are one of the early steps in the cancer drug development pipeline. New drug candidates are tested on cells related to the intended tissues to gather information about the drug efficacy, toxicity, and metabolism, in order to screen the promising drug candidates before animal and human studies. Traditionally, these screenings have been performed using tissue culture plates that grow cells on a two-dimensional surface. However, traditional drug screening methods have a high failure rate in subsequent clinical steps due to their failure to simulate the natural microenvironment of cancer cells. Three-dimensional cultures such as cancer spheroids try to address this problem by growing the cells in 3-D to mimic the in vivo conditions better, simulating the conditions such as low oxygen levels and insufficient nutrients, and including cell-cell interactions that are absent in 2-D cultures. Benefitting from 3-D cultures, while meeting the high-throughput demands of modern industrial practice requires reliance on scalable image-based techniques and developments of applicable tools for this purpose. This thesis showcases several studies using an image-based drug screening microfluidic platform capable of controlling the oxygen concentration around the cells, employing breast cancer cell spheroids. We show that spheroids can grow on-chip while monitoring them with two-photon microscopy. We have studied the effects of hypoxia on lipid nanoparticle absorption in breast cancer tumour spheroids, as well as the effects of hypoxia on cancer spheroids under chemotherapeutic treatment. This thesis also prominently presents HyClear, a novel tissue clearing protocol developed specifically for the rapid and easy application on spheroids and other microtissues, in order to enable imaging them through their depth in a high-throughput manner. HyClear was developed by adapting other tissue clearing protocols (established for larger tissues) to the needs of spheroids. The HyClear protocol was compared with other prominent tissue clearing protocols, to showcase several examples of its ability to clear small and large tissues and its applicability to large screening experiments.
Canaries and Whistles: Resilient Drone Communication Networks with (or without) Deep Reinforcement Learning
Creators: name: Hicks, Chris
name: Mavroudis, Vasilios
name: Foley, Myles
name: Davies, Thomas
name: Highnam, Kate
name: Watson, Tim
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cryptography and Security (cs.CR)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Communication networks able to withstand hostile environments are critically important for disaster relief operations. In this paper, we consider a challenging scenario where drones have been compromised in the supply chain, during their manufacture, and harbour malicious software capable of wide-ranging and infectious disruption. We investigate multi-agent deep reinforcement learning as a tool for learning defensive strategies that maximise communications bandwidth despite continual adversarial interference. Using a public challenge for learning network resilience strategies, we propose a state-of-the-art expert technique and study its superiority over deep reinforcement learning agents. Correspondingly, we identify three specific methods for improving the performance of our learning-based agents: (1) ensuring each observation contains the necessary information, (2) using expert agents to provide a curriculum for learning, and (3) paying close attention to reward. We apply our methods and present a new mixed strategy enabling expert and learning-based agents to work together and improve on all prior results.
description: Published in AISec '23. This version fixes some terminology to improve readability
On the interlacing of cylinder functions
Creators: name: Palmai, Tamas
Publisher: name: arXiv
Year: 2010
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 33C10

description: Necessary and sufficient conditions for the interlacing of the zeros of cylinder functions and their derivatives of different orders are given.
description: 6 pages; v2: substantial changes, v3: minor corrections
Nonintersecting random walks in the neighborhood of a symmetric tacnode
Creators: name: Adler, Mark
name: Ferrari, Patrik L.
name: van Moerbeke, Pierre
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mathematical Physics (math-ph)
subject: Probability (math.PR)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Consider a continuous time random walk in $\mathbb{Z}$ with independent and exponentially distributed jumps $\pm1$. The model in this paper consists in an infinite number of such random walks starting from the complement of $\{-m,-m+1,\ldots,m-1,m\}$ at time -t, returning to the same starting positions at time t, and conditioned not to intersect. This yields a determinantal process, whose gap probabilities are given by the Fredholm determinant of a kernel. Thus this model consists of two groups of random walks, which are contained within two ellipses which, with the choice $m\simeq2t$ to leading order, just touch: so we have a tacnode. We determine the new limit extended kernel under the scaling $m=\lfloor2t+σt^{1/3}\rfloor$, where parameter $σ$ controls the strength of interaction between the two groups of random walkers.
description: Published in at http://dx.doi.org/10.1214/11-AOP726 the Annals of Probability (http://www.imstat.org/aop/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Automated Contact Tracing: a game of big numbers in the time of COVID-19
Creators: name: Kim, Hyunju
name: Paul, Ayan
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2020

description: One of the more widely advocated solutions for slowing down the spread of COVID-19 has been automated contact tracing. Since proximity data can be collected by personal mobile devices, the natural proposal has been to use this for automated contact tracing providing a major gain over a manual implementation. In this work, we study the characteristics of voluntary and automated contact tracing and its effectiveness for mapping the spread of a pandemic due to the spread of SARS-CoV-2. We highlight the infrastructure and social structures required for automated contact tracing to work. We display the vulnerabilities of the strategy to inadequate sampling of the population, which results in the inability to sufficiently determine significant contact with infected individuals. Of crucial importance will be the participation of a significant fraction of the population for which we derive a minimum threshold. We conclude that relying largely on automated contact tracing without population-wide participation to contain the spread of the SARS-CoV-2 pandemic can be counterproductive and allow the pandemic to spread unchecked. The simultaneous implementation of various mitigation methods along with automated contact tracing is necessary for reaching an optimal solution to contain the pandemic.
Magnetic order in quasi-two-dimensional molecular magnets investigated with muon-spin relaxation
Creators: name: Steele, Andrew J.
name: Lancaster, Tom
name: Blundell, Stephen J.
name: Baker, Peter J.
name: Pratt, Francis L.
name: Baines, Chris
name: Conner, Marianne M.
name: Southerland, Heather I.
name: Manson, Jamie L.
name: Schlueter, John A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present the results of a muon-spin relaxation (muSR) investigation into magnetic ordering in several families of layered quasi-two-dimensional molecular antiferromagnets based on transition metal ions such as S=1/2 Cu2+ bridged with organic ligands such as pyrazine. In many of these materials magnetic ordering is difficult to detect with conventional magnetic probes. In contrast, muSR allows us to identify ordering temperatures and study the critical behavior close to T_N . Combining this with measurements of in-plane magnetic exchange J and predictions from quantum Monte Carlo simulations we may assess the degree of isolation of the 2D layers through estimates of the effective inter-layer exchange coupling and in-layer correlation lengths at T_N . We also identify the likely metal-ion moment sizes and muon stopping sites in these materials, based on probabilistic analysis of the magnetic structures and of muon-fluorine dipole-dipole coupling in fluorinated materials.
description: Text and figures as published in Physical Review B
Gaussian quantum steering in a nondegenerate three-level laser
Creators: name: Boukhris, Benachir
name: Tirbiyine, Ahmed
name: Qars, Jamal El
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Steering is a type of nonseparable quantum correlation, where its inherent asymmetric feature makes it distinct from Bell-nonlocality and entanglement. In this paper, we investigate quantum steering in a two-mode Gaussian state $% \hat{\varrho}_{c_{1}c_{2}}$ coupled to a two-mode vacuum reservoir. The mode $c_{1}$($c_{2}$) is emitted during the first(second) transition of a nondegenerate three-level cascade laser. By means of the master equation of the state $\hat{\varrho}_{c_{1}c_{2}}$, we derive analytical expression of the steady-state covariance matrix of the modes $c_{1}$ and $c_{2}$. Using realistic experimental parameters, we show that the state $\hat{\varrho}% _{c_{1}c_{2}}$ can exhibit asymmetric steering. Furthermore, by an appropriate choice of the physical parameters of the state $\hat{\varrho}% _{c_{1}c_{2}}$, we show that one-way steering can be achieved. Essentially, we demonstrate that one-way steering can, in general, occur only from $% c_{1}\rightarrow c_{2}$. Besides, we perform a comparative study between the steering of the two laser modes and their Gaussian Rényi-2 entanglement. As results, we found that the entanglement and steering behave similarly in the same circumstances, i.e., both of them decay under dissipation effect, moreover, they can be well enhanced by inducing more and more quantum coherence in the state $\hat{\varrho}_{c_{1}c_{2}}$% . In particular, we found that the steering remains always less than the Gaussian Rényi-2 entanglement.
Robustness of interdependent networks under targeted attack
Creators: name: Huang, Xuqing
name: Gao, Jianxi
name: Buldyrev, Sergey V.
name: Havlin, Shlomo
name: Stanley, H. Eugene
Publisher: name: arXiv
Year: 2010
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Social and Information Networks (cs.SI)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: When an initial failure of nodes occurs in interdependent networks, a cascade of failure between the networks occurs. Earlier studies focused on random initial failures. Here we study the robustness of interdependent networks under targeted attack on high or low degree nodes. We introduce a general technique and show that the {\it targeted-attack} problem in interdependent networks can be mapped to the {\it random-attack} problem in a transformed pair of interdependent networks. We find that when the highly connected nodes are protected and have lower probability to fail, in contrast to single scale free (SF) networks where the percolation threshold $p_c=0$, coupled SF networks are significantly more vulnerable with $p_c$ significantly larger than zero. The result implies that interdependent networks are difficult to defend by strategies such as protecting the high degree nodes that have been found useful to significantly improve robustness of single networks.
description: 11 pages, 2 figures
Illicit Darkweb Classification via Natural-language Processing: Classifying Illicit Content of Webpages based on Textual Information
Creators: name: Cascavilla, Giuseppe
name: Catolino, Gemma
name: Sangiovanni, Mirella
Publisher: name: arXiv
Year: 2023
Subjects: subject: Information Retrieval (cs.IR)
subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: This work aims at expanding previous works done in the context of illegal activities classification, performing three different steps. First, we created a heterogeneous dataset of 113995 onion sites and dark marketplaces. Then, we compared pre-trained transferable models, i.e., ULMFit (Universal Language Model Fine-tuning), Bert (Bidirectional Encoder Representations from Transformers), and RoBERTa (Robustly optimized BERT approach) with a traditional text classification approach like LSTM (Long short-term memory) neural networks. Finally, we developed two illegal activities classification approaches, one for illicit content on the Dark Web and one for identifying the specific types of drugs. Results show that Bert obtained the best approach, classifying the dark web's general content and the types of Drugs with 96.08% and 91.98% of accuracy.
Stabilising the supersymmetric Standard Model on the Z_6' orientifold
Creators: name: Bailin, David
name: Love, Alex
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Four stacks of intersecting supersymmetric fractional D6-branes on the Z_6' orientifold have previously been used to construct consistent models having the spectrum of the supersymmetric Standard Model, including a single pair of Higgs doublets, plus three right-chiral neutrino singlets. However, various moduli, Kahler moduli and complex-structure moduli, twisted and untwisted, remain unfixed. Further, some of the Yukawa couplings needed to generated quark and lepton masses are forbidden by a residual global symmetry of the model. In this paper we study the stabilisation of moduli using background fluxes, and show that the moduli may be stabilised within the Kahler cone. In principle, missing Yukawa couplings may be restored, albeit with a coupling that is suppressed by non-perturbative effects, by the use Euclidean D2-branes that are pointlike in spacetime, i.e. E2-instantons. However, for the models under investigation, we show that this is not possible.
description: 32 pages, LaTeX. Small addition made prior to submission for publication
Situating language register across the ages, languages, modalities, and cultural aspects: Evidence from complementary methods
Creators: name: Pescuma, Valentina Nicole
name: Serova, Dina
name: Lukassek, Julia
name: Sauermann, Antje
name: Schäfer, Roland
name: Adli, Aria
name: Bildhauer, Felix
name: Egg, Markus
name: Hülk, Kristina
name: Ito, Aine
name: Jannedy, Stefanie
name: Kordoni, Valia
name: Kuehnast, Milena
name: Kutscher, Silvia
name: Lange, Robert
name: Lehmann, Nico
name: Liu, Mingya
name: Lütke, Beate
name: Maquate, Katja
name: Mooshammer, Christine
name: Mortezapour, Vahid
name: Müller, Stefan
name: Norde, Muriel
name: Pankratz, Elizabeth
name: Patarroyo, Angela G.
name: Pleşca, Ana-Maria
name: Rodriguez Ronderos, Camilo
name: Rotter, Stephanie
name: Sauerland, Uli
name: Schnelle, Gohar
name: Schulte, Britta
name: Schüppenhauer, Gediminas
name: Sell, Bianca Maria
name: Solt, Stephanie
name: Terada, Megumi
name: Tsiapou, Dimitra
name: Verhoeven, Elisabeth
name: Weirich, Melanie
name: Wiese, Heike
name: Zaruba, Kathy
name: Zeige, Lars Erik
name: Lüdeling, Anke
name: Knoeferle, Pia
Publisher: name: Humboldt-Universität zu Berlin
Year: 2023
Subjects: subject: language register
subject: situational context
subject: behavioral methods
subject: corpus methods
subject: register markers
subject: language variation
subject: 400 Sprache

description: In the present review paper by members of the collaborative research center “Register: Language Users' Knowledge of Situational-Functional Variation” (CRC 1412), we assess the pervasiveness of register phenomena across different time periods, languages, modalities, and cultures. We define “register” as recurring variation in language use depending on the function of language and on the social situation. Informed by rich data, we aim to better understand and model the knowledge involved in situation- and function-based use of language register. In order to achieve this goal, we are using complementary methods and measures. In the review, we start by clarifying the concept of “register”, by reviewing the state of the art, and by setting out our methods and modeling goals. Against this background, we discuss three key challenges, two at the methodological level and one at the theoretical level: (1) To better uncover registers in text and spoken corpora, we propose changes to established analytical approaches. (2) To tease apart between-subject variability from the linguistic variability at issue (intra-individual situation-based register variability), we use within-subject designs and the modeling of individuals' social, language, and educational background. (3) We highlight a gap in cognitive modeling, viz. modeling the mental representations of register (processing), and present our first attempts at filling this gap. We argue that the targeted use of multiple complementary methods and measures supports investigating the pervasiveness of register phenomena and yields comprehensive insights into the cross-methodological robustness of register-related language variability. These comprehensive insights in turn provide a solid foundation for associated cognitive modeling.
Cohomology of local systems on loci of d-elliptic abelian surfaces
Creators: name: Petersen, Dan
Publisher: name: arXiv
Year: 2010
Subjects: subject: Algebraic Geometry (math.AG)
subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 14J15, 14G35, 11F11

description: We consider the loci of d-elliptic curves in $M_2$, and corresponding loci of d-elliptic surfaces in $A_2$. We show how a description of these loci as quotients of a product of modular curves can be used to calculate cohomology of natural local systems on them, both as mixed Hodge structures and $\ell$-adic Galois representations. We study in particular the case d=2, and compute the Euler characteristic of the moduli space of n-pointed bi-elliptic genus 2 curves in the Grothendieck group of Hodge structures.
description: 15 pages, complete re-write of earlier version
Identifying Sentiment Influences Provoked by Context Factors – Results from a Data Analytics Procedure Performed on Tweets
Creators: name: Konadl, Daniel
name: Wörner, Janik
name: Leist, Susanne
Publisher: name: Universität Regensburg
Year: 2021
Subjects: subject: 004 Informatik

description: Context factors have lasting impacts on people’s sentiments. Exploring impacts that different contexts have on sentiments can be crucial for managing the increasing number of communications companies nowadays maintain with customers via social media channels. To help companies prevent impacts of neg-ative word of mouth, we provide an overview about sentiment-influential contexts for tweets as one kind of social media texts previously discussed within the literature. We collected an overall amount of 358.923.210 tweets and performed analysis to un-cover the effects of continents, mobile devices’ oper-ating systems (OS) and the combination of both on sentiments expressed within tweets. Our results show remarkable differences for tweets originating from North America and Apple devices, which turned out to be the tweets with the lowest sentiments compared to the other continents and the mobile OS Android.
Central sensitization and somatic activating KRAS mutations in endometriosis-associated pain
Creators: name: Orr, Natasha Leigh
Publisher: name: University of British Columbia
Year: 2024

description: Endometriosis is the presence of endometrial-like tissue growing abnormally outside the uterus and affects 10% of women and an unknown number of gender diverse people. There are 3 anatomical types of endometriosis: superficial peritoneal (SUP), ovarian endometrioma (OMA), and deep infiltrating endometriosis (DIE). Pelvic pain is a cardinal symptom in endometriosis. The etiology of pelvic pain in endometriosis is multifactorial, meaning that multiple factors may play a role in this pain, such as central nervous system sensitization and peripheral factors (e.g., somatic mutations in endometriosis lesions). Central nervous system amplification of pain pathways (central sensitization) has been found in people with endometriosis and pelvic pain, which manifests as non-gynecologic pain contributors (central sensitivity syndromes (CSS)). In Chapter 2, I hypothesized that the Central Sensitization Inventory (CSI) could be used to identify centrally sensitized people in an endometriosis population and predict surgical outcomes. My results indicated that a CSI cut-off of 40 or higher could identify a person with 3 or more CSS with good sensitivity and specificity. Additionally, recent findings showed that 25% of DIE (without concurrent cancer) harbour somatic activating mutations of the KRAS oncogene in endometriosis epithelial cells. In Chapter 3, I explored the prevalence of somatic activating KRAS codon 12 mutations in endometriosis lesions and their association with clinical variables (e.g., pain scores). My results indicated that OMA samples had the highest KRAS mutation prevalence compared to the other anatomical types. Additionally, KRAS mutations were associated with more severe anatomic disease (i.e., higher stage and more invasive endometriosis). In Chapter 4, I addressed the gap between evidence and practice by translating research findings in a one-day workshop and an accessible video format to patients with endometriosis and their loved ones. My results indicated that a one-day workshop on sexual pain and endometriosis showed promise at improving confidence in self-managing sexual pain and improving knowledge on endometriosis, as well as intent for behavioral changes. Overall, my dissertation work may inform a future clinical decision aid to identify the primary factors contributing to endometriosis pain and suggest specific therapies to treat those factors and reduce unnecessary procedures.
Tunneling of polarized fermions in 3D double wells
Creators: name: Macri, Tommaso
name: Trombettoni, Andrea
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We study the tunneling of a spin polarized Fermi gas in a three-dimensional double well potential, focusing on the time dynamics starting from an initial state in which there is an imbalance in the number of particles in the two wells. Although fermions in different doublets of the double well tunnel with different frequencies, we point out that (incoherent) oscillations of a large number of particles can arise, as a consequence of the presence of transverse degrees of freedom. Estimates of the doublet structure and of the occupation of transverse eigenstates for a realistic experimental setup are provided.
description: 10 pages, Typos corrected and figures changed - published in Laser Physics, issue on the LPHYS'11 conference (Sarajevo, 2011)
Mapping the magnetic exchange interactions from first principles: Anisotropy anomaly and application to Fe, Ni, and Co
Creators: name: Lounis, Samir
name: Dederichs, Peter H.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Mapping the magnetic exchange interactions from model Hamiltonian to density functional theory is a crucial step in multi-scale modeling calculations. Considering the usual magnetic force theorem but with arbitrary rotational angles of the spin moments, a spurious anisotropy in the standard mapping procedure is shown to occur provided by bilinear-like contributions of high order spin interactions. The evaluation of this anisotropy gives a hint on the strength of non-bilinear terms characterizing the system under investigation.
description: 11 pages, 1 figure
title: Profiles and success factors of responsive organizations
Creators: name: Zipse, Philip Karl
Publisher: name: TU Wien
Year: 2023
Subjects: subject: Organization structure
subject: corporate innovation
subject: agile working
subject: organizational adaptability

description: Innovation departments in fast-changing environments face the urge of harmonizing continuous product development with the preservation and uninterrupted operation of the existing product portfolio.Resulting from the lack of responsiveness and high operational strain, traditional organization structures are not always suitable to meet these needs, creating the demand for alternative organization setups.Thus, this thesis aims to provide an overview of organizational setups that have been developed to support organizational responsiveness, and elements that allow the creation of an appropriate setup of innovative organizations. All based on the assumption that a correlation exists between meeting anorganization’s demands for operational agility and their innovative capabilities. The thesis distinguishes between the organization structure that creates the framework and enables operations, and the procedural organization that guides dynamic operational processes and responsibilities.Building on literature research, approaches to traditional and responsive organization design are identified and elaborated. By confronting these with their limitations and practical challenges, the beneficial constituents of responsive setups are carved out. Confronting these elements with the challenges derived from interviews with an innovation organization, these insights lead the discovery of organizational contributors to the organizational responsiveness, hence innovative capabilities of an organization.The work results in an extensive overview of existing responsive organization approaches supplemented with a set of empirical insights originating from case studies. Furthermore, a comparison of the practical challenges of an innovation department and the common characteristics of responsive organization setups is drawn to evaluate the practical relevance of the identified responsive characteristics.The aspect that reoccurred in different manifestations, in both responsive organization theories and casestudies, is distribution. Such ranges from procedural responsibilities to managerial authority, as well asstructural to procedural organization. It appears to be a common theme when overcoming practical challenges with responsive organization approaches as the flexibilization is achieved by independently leveraging different constituents of an organization. Hereby, the underlying organization structuresupports the operational organization by fulfilling general static functions and enabling a higher degree offlexibility by reducing the amount of static aspects within the organization.
Bulk-boundary correspondence of topological insulators from their Green's functions
Creators: name: Essin, Andrew M.
name: Gurarie, Victor
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Topological insulators are noninteracting, gapped fermionic systems which have gapless boundary excitations. They are characterized by topological invariants, which can be written in many different ways, including in terms of Green's functions. Here we show that the existence of the edge states directly follows from the existence of the topological invariant written in terms of the Green's functions, for all ten classes of topological insulators in all spatial dimensions. We also show that the resulting edge states are characterized by their own topological invariant, whose value is equal to the topological invariant of the bulk insulator. This can be used to test whether a given model Hamiltonian can describe an edge of a topological insulator. Finally, we observe that the results discussed here apply equally well to interacting topological insulators, with certain modifications.
description: 6.5 pages + appendices; significantly expanded explanations
Reawakening memory and refusing erasure : Sqilxw legacies of resistance through familial stories of Mary Ann and Mary Terese
Creators: name: Acheson, Cassidy
Publisher: name: University of British Columbia
Year: 2022

description: Nk’maplqs is unceded Sqilxw territory located at the head of Okanagan Lake, near current-day Vernon, British Columbia. The Sqilxw have consistently practiced their belonging through diverse modes of upholding responsibilities to this place. In the summer of 1867, settler ranchers Thomas Greenhow and Cornelius O’Keefe arrived at Nk’maplqs and began the process of claiming land by severing Sqilxw relations to place and belonging. Shortly after they arrived, both men married Sqilxw women, who they later abandoned to marry White women. Greenhow married Mary Ann (Sqilxw) and they had a daughter together named Mary Terese. In 1967, O’Keefe’s White descendants established the O’Keefe Ranch historic site to preserve their father’s story in public memory. Drawing on a mixed-methods approach that prioritizes Indigenous methodologies and feminist standpoint theory, I utilize storywork circle conversations with Mary Ann’s descendants alongside archival research and place-based methods to answer the question: How have Sqilxw women resisted settler claims to land and memory at Nk’maplqs? Our work brings to light the process of claiming settler place at the local level by demonstrating how Victorian-British settler ideologies of race, class, and gender produced the conditions in which Greenhow and O’Keefe felt empowered to sever their Sqilxw relations and claim unceded land for their cattle empire. Through our conversations, we demonstrate that the erasure of Sqilxw history is a crucial method of constructing settler belonging and Sqilxw unbelonging in order to firmly establish settler power on stolen land. Finally, by tracing acts of resistance and maintaining Sqilxw responsibilities among Mary Ann and Mary Terese’s descendants, this thesis emphasizes their refusal to be forgotten.
Quantum Dot Spin Filter in Resonant Tunneling and Kondo Regimes
Creators: name: Eto, Mikio
name: Yokoyama, Tomohiro
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: A quantum dot with spin-orbit interaction can work as an efficient spin filter if it is connected to N (> 2) external leads via tunnel barriers. When an unpolarized current is injected to a quantum dot from a lead, polarized currents are ejected to other leads. A two-level quantum dot is examined as a minimal model. First, we show that the spin polarization is markedly enhanced by resonant tunneling when the level spacing in the dot is smaller than the level broadening. Next, we examine the many-body resonance induced by the Kondo effect in the Coulomb blockade regime. A large spin current is generated in the presence of the SU(4) Kondo effect when the level spacing is less than the Kondo temperature.
description: 5 pages, 4 figures; J. Phys. Soc. Jpn., in press (final version); revised title and text, results unchanged