cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Triphenylphosphine assay for nanomolar detection of lipid hydroperoxides
Creators: name: Zeng, Carey
Publisher: name: No Publisher Supplied
Year: 2025

description: As the first stable product of lipid oxidation, hydroperoxides have often been the most common marker of oxidation progress. Their importance in the integrated alternated reaction scheme for lipid oxidation merits the need for a sensitive assay. The gold standard assay of hydroperoxide content -- iodometric titration with thiosulfate – has low sensitivity for the amount of sample required, tedious handling, and no possibility for high throughput. More sensitive methods such as xylenol orange and ferric thiocyanate colorimetric assays have debatable stoichiometry and specificity, limited range of quantification, and low stability.Triphenylphosphine (TPP), used for decades to detect trace levels of hydroperoxides in solvents, offers excellent promise as an alternative reagent for specific quantitation of lipid hydroperoxides with greater sensitivity than previous methods. TPP reaction with hydroperoxides yields the optically active triphenylphosphine oxide (TPPO) which can be separated from other reactants by HPLC to create an assay with greater sensitivity, specificity, ease of handling, stability, confirmation of reaction completion, and possibility of high-throughput analyses using autosamplers. A previous study using standards verified quantitation of nanomolar hydroperoxides but did not optimize applicability to lipid hydroperoxides.This thesis extended TPP method development to optimize reaction specifically with lipid hydroperoxides (LOOH). A gradient program that separated TPP, TPPO, LOOH, and product hydroxylipids on a pentafluorophenyl column provided a means of following reaction completion with samples of unknown LOOH content and allowed determination of TPP excess required for complete reaction. Reversed-phase HPLC proved suitable for quantitating hydroperoxides of fatty acid methyl esters, but quantitating hydroperoxides of triacylglycerols required adapting the method to normal-phase HPLC due to their hydrophobicity.Standard curves of TPPO were generated for quantitating lipid hydroperoxides by both reversed-phase and normal phase HPLC. Response curves for TPP reaction with oxidized lipids of various hydroperoxide concentrations (predicted by iodometric titration) were co-linear with the TPPO standard curve, showing that the TPP-lipid hydroperoxide reaction is stoichiometrically 1:1. With reversed-phase HPLC, limits of detection and quantification were 2 pmol and 6.03 pmol TPPO injected (LOOH reacted), respectively. With normal-phase HPLC, limits of detection and quantification were 0.19 pmol and 0.57 pmol TPPO injected (LOOH reacted), respectively.
Сфиральное время в архитектуре ИИ и когнитивных системах
Creators: name: Басаргин, Олег Сергеевич
Publisher: name: Zenodo
Year: 2025

description: Предложена архитектурная гипотеза для искусственного интеллекта, основанная на концепции сфирального времени (S-времени), в котором вычислительные процессы организованы как фазовые траектории с вложенными переходами и петлями. В отличие от линейной причинной схемы, S-модель предполагает, что каждый цикл обработки реализует виток с фазой φ(s), а переход между режимами происходит через структурный фазовый разворот — S-петлю. Введены новые элементы архитектуры: фазовые буферы, S-петлевой переключатель, Даат-слой выбора, сеть-хранитель фазовой истории. Рассмотрены примеры задач (когнитивный выбор, интерпретация противоречивых данных), режимы фазового обучения, сценарии внедрения и интеграции с нейронаукой. Модель S-времени позволяет формализовать фазовую логику и обеспечивает новый уровень временной организации ИИ — топологический, обратимый и когнитивно согласованный.
Connection Between System Parameters and Localization Probability in Network of Randomly Distributed Nodes
Creators: name: Daneshgaran, F.
name: Laddomada, Massimiliano
name: Mondin, M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Discrete Mathematics (cs.DM)
subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: This article deals with localization probability in a network of randomly distributed communication nodes contained in a bounded domain. A fraction of the nodes denoted as L-nodes are assumed to have localization information while the rest of the nodes denoted as NL nodes do not. The basic model assumes each node has a certain radio coverage within which it can make relative distance measurements. We model both the case radio coverage is fixed and the case radio coverage is determined by signal strength measurements in a Log-Normal Shadowing environment. We apply the probabilistic method to determine the probability of NL-node localization as a function of the coverage area to domain area ratio and the density of L-nodes. We establish analytical expressions for this probability and the transition thresholds with respect to key parameters whereby marked change in the probability behavior is observed. The theoretical results presented in the article are supported by simulations.
description: To appear on IEEE Transactions on Wireless Communications, November 2007
Description of Gloeomargarita ahousahtiae sp. nov. (Gloeomargaritales), a thermophilic cyanobacterium with intracellular carbonate inclusions
Creators: name: Bacchetta, Thomas
name: López-García, Purificación
name: Gutiérrez-Preciado, Ana
name: Mehta, Neha
name: Skouri-Panet, Feriel
name: Benzerara, Karim
name: Ciobanu, Maria
name: Yubuki, Naoji
name: Tavera, Rosaluz
name: Moreira, David
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biochemistry
subject: Space Science
subject: Microbiology
subject: FOS: Biological sciences
subject: Evolutionary Biology
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology

description: A unicellular cyanobacterium, strain VI4D9, was isolated from thermophilic microbial mats thriving in a hot spring of the Ahousaht territory of Vancouver Island, Canada, and characterized using optical and electron microscopy, genome sequencing and cultivation approaches. The cells were elongated rods (5.1 µm in length and 1.2 µm in width, on average). Their UV visible absorption spectra revealed that they contain chlorophyll a, phycocyanin and carotenoids. Transmission electron microscopy showed the presence of thylakoids concentrated on one side of the cells. The strain grew within a temperature range of 37–50°C, with an optimum growth at 45°C. Its genome had a size of 3 049 282 bp and a DNA G + C content of 51.8 mol%. The cells contained numerous intracellular spherical granules easily visible under scanning electron microscopy. Energy dispersive X-ray spectroscopy revealed that these granules were made of Ca-, Ba- and Sr-containing carbonates. A phylogenetic 16S rRNA gene tree robustly placed this strain as sister to several environmental sequences and the described species Gloeomargarita lithophora, also characterized by the possession of intracellular carbonate inclusions. We consider strain VI4D9 to represent a new Gloeomargarita species based on its marked phenotypic differences with G. lithophora, notably, its thermophilic nature and different thylakoid organization, therefore we propose the name Gloeomargarita ahousahtiae sp. nov. The type strain is VI4D9 (Culture Collection of Algae and Protozoa strain 1472/1; Laboratorio de Algas Continentales Mexico strain LAC 140). Gloeomargarita ahousahtiae is the second species described within the recently discovered order Gloeomargaritales. Gloeomargarita ahousahtiae is a new thermophilic cyanobacterium.Growth temperature and thylakoid morphology differentiate G. ahousahtiae and G. lithophora.All described Gloeomargaritales synthesize intracellular carbonate inclusions. Gloeomargarita ahousahtiae is a new thermophilic cyanobacterium. Growth temperature and thylakoid morphology differentiate G. ahousahtiae and G. lithophora. All described Gloeomargaritales synthesize intracellular carbonate inclusions.
Walk-Steered Convolution for Graph Classification
Creators: name: Jiang, Jiatao
name: Xu, Chunyan
name: Cui, Zhen
name: Zhang, Tong
name: Zheng, Wenming
name: Yang, Jian
Publisher: name: arXiv
Year: 2018
Subjects: subject: Social and Information Networks (cs.SI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Graph classification is a fundamental but challenging issue for numerous real-world applications. Despite recent great progress in image/video classification, convolutional neural networks (CNNs) cannot yet cater to graphs well because of graphical non-Euclidean topology. In this work, we propose a walk-steered convolutional (WSC) network to assemble the essential success of standard convolutional neural networks as well as the powerful representation ability of random walk. Instead of deterministic neighbor searching used in previous graphical CNNs, we construct multi-scale walk fields (a.k.a. local receptive fields) with random walk paths to depict subgraph structures and advocate graph scalability. To express the internal variations of a walk field, Gaussian mixture models are introduced to encode principal components of walk paths therein. As an analogy to a standard convolution kernel on image, Gaussian models implicitly coordinate those unordered vertices/nodes and edges in a local receptive field after projecting to the gradient space of Gaussian parameters. We further stack graph coarsening upon Gaussian encoding by using dynamic clustering, such that high-level semantics of graph can be well learned like the conventional pooling on image. The experimental results on several public datasets demonstrate the superiority of our proposed WSC method over many state-of-the-arts for graph classification.
description: 13 pages, 6 figures, 3 tables
Structure and Function of Cardiac Troponin C (TNNC1): Implications for Heart Failure, Cardiomyopathies, and Troponin Modulating Drugs
Creators: Li, Monica X.
Hwang, Peter M.
Publisher: name: University of Alberta Library
Year: 2015

In striated muscle, the protein troponin complex turns contraction on and off in a calcium-dependent manner. The calcium-sensing component of the complex is troponin C, which is expressed from the TNNC1 gene in both cardiac muscle and slow-twitch skeletal muscle (identical transcript in both tissues) and the TNNC2 gene in fast-twitch skeletal muscle. Cardiac troponin C (cTnC) is made up of two globular EF-hand domains connected by a flexible linker. The structural C-domain (cCTnC) contains two high affinity calcium-binding sites that are always occupied by Ca2+ or Mg2+ under physiologic conditions, stabilizing an open conformation that remains anchored to the rest of the troponin complex. In contrast, the regulatory N-domain (cNTnC) contains a single low affinity site that is largely unoccupied at resting calcium concentrations. During muscle activation, calcium binding to cNTnC favors an open conformation that binds to the switch region of troponin I, removing adjacent inhibitory regions of troponin I from actin and allowing muscle contraction to proceed. Regulation of the calcium binding affinity of cNTnC is physiologically important, because it directly impacts the calcium sensitivity of muscle contraction. Calcium sensitivity can be modified by drugs that stabilize the open form of cNTnC, post-translational modifications like phosphorylation of troponin I, or downstream thin filament protein interactions that impact the availability of the troponin I switch region. Recently, mutations in cTnC have been associated with hypertrophic or dilated cardiomyopathy. A detailed understanding of how calcium sensitivity is regulated through the troponin complex is necessary for explaining how mutations perturb its function to promote cardiomyopathy and how post-translational modifications in the thin filament affect heart function and heart failure. Troponin modulating drugs are being developed for the treatment of cardiomyopathies and heart failure.
Quantized conductance of a suspended graphene nanoconstriction
Creators: name: Tombros, Nikolaos
name: Veligura, Alina
name: Junesch, Juliane
name: Guimarães, Marcos H. D.
name: Marun, Ivan J. Vera
name: Jonkman, Harry T.
name: van Wees, Bart J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: A yet unexplored area in graphene electronics is the field of quantum ballistic transport through graphene nanostructures. Recent developments in the preparation of high mobility graphene are expected to lead to the experimental verification and/or discovery of many new quantum mechanical effects in this field. Examples are effects due to specific graphene edges, such as spin polarization at zigzag edges of a graphene nanoribbon and the use of the valley degree of freedom in the field of graphene valleytronics8. As a first step in this direction we present the observation of quantized conductance at integer multiples of 2e^2/h at zero magnetic field and 4.2 K temperature in a high mobility suspended graphene ballistic nanoconstriction. This quantization evolves into the typical quantum Hall effect for graphene at magnetic fields above 60mT. Voltage bias spectroscopy reveals an energy spacing of 8 meV between the first two subbands. A pronounced feature at 0.6 2e^2/h present at a magnetic field as low as ~0.2T resembles the "0.7 anomaly" observed in quantum point contacts in a GaAs-AlGaAs two dimensional electron gas, having a possible origin in electron-electron interactions.
description: Main paper + supplementary information. Accepted for publication in Nature Physics
Hyperbolic systems with non-diagonalisable principal part and variable multiplicities, I. Well-posedness
Creators: name: Garetto, Claudia
name: Jäh, Christian
name: Ruzhansky, Michael
Publisher: name: arXiv
Year: 2018
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: Primary 35L45, Secondary 46E35

description: In this paper we analyse the well-posedness of the Cauchy problem for a rather general class of hyperbolic systems with space-time dependent coefficients and with multiple characteristics of variable multiplicity. First, we establish a well-posedness result in anisotropic Sobolev spaces for systems with upper triangular principal part under interesting natural conditions on the orders of lower order terms below the diagonal. Namely, the terms below the diagonal at a distance $k$ to it must be of order $-k$. This setting also allows for the Jordan block structure in the system. Second, we give conditions for the Schur type triangularisation of general systems with variable coefficients for reducing them to the form with an upper triangular principal part for which the first result can be applied. We give explicit details for the appearing conditions and constructions for $2\times 2$ and $3\times 3$ systems, complemented by several examples.
Vocabulary Acquisition and Verbal Short-Term Memory: Computational and Neural Bases
Creators: name: Prahlad  Gupta
name: Macwhinney, Brian
Publisher: name: Carnegie Mellon University
Year: 1997
Subjects: subject: 170199 Psychology not elsewhere classified
subject: FOS: Psychology

description: In this paper, we explore the hypothesis that human vocabulary acquisition processes and verbal short-term memory abilities utilize a common cognitive and neural system. We begin by reviewing behavioral evidence for a shared set of processes. Next, we examine what the computational bases of such a shared system might be and how vocabulary acquisition and verbal short-term memory might be related in mechanistic terms. We examine existing computational models of vocabulary acquisition and of verbal short-term memory, concluding that they fail to adequately relate these two domains. We then propose an alternative model which accounts not only for the relationship between word learning and verbal short-term memory, but also for a wide range of phenomena in verbal short-term memory. Furthermore, this new account provides a clear statement of the relationship between the proposed system and mechanisms of language processing more generally. We then consider possible neural substrates for this cognitive system. We begin by reviewing what is known of the neural substrates of speech processing and outline a conceptual framework within which a variety of seemingly contradictory neurophysiological and neuropsychological findings can be accommodated. The linkage of the shared system for vocabulary acquisition and verbal short-term memory to neural areas specifically involved in speech processing lends further support to our functionallevel identification of the mechanisms of vocabulary acquisition and verbal shortterm memory with those of language processing. The present work thus relates vocabulary acquisition and verbal short-term memory to each other and to speech processing, at a cognitive, computational, and neural level.
Isotopic and biochemical composition of Western Mediterranean macroalgae
Creators: name: Cresson, Pierre
name: Ruitton, Sandrine
name: Noisette, Fanny
name: Harmelin-Vivien, Mireille
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biochemistry
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Inorganic Chemistry
subject: Plant Biology

description: Among marine primary producers, macroalgae support complex and productive coastal food webs, but coastal primary production relies on terrigenous inputs and remineralized organic matter which both vary seasonally. An approach combining stable isotope and biochemical analyses enables a better characterization of macroalgae specificities and highlights environmental influences on their chemical signature. This study compared the isotopic signature and biochemical composition of 22 Mediterranean macroalgae belonging to Rhodophyta (red algae), Phaeophyceae (brown algae) and Chlorophyta (green algae) between March and November 2010 to capture the differences in species chemical signatures potentially driven by metabolic traits or environmental drivers. Carbon stable isotope values were evidenced as a good proxy of specific carbon metabolism: low values observed in red algae could be related to the reported absence of carbon concentrating mechanisms (CCMs) in this group while higher values were driven by strong CCM activity in green algae. Biochemical patterns also differed between groups: soluble carbohydrates were a major component for red algae, while lipids and proteins dominated in brown algae, and insoluble carbohydrate concentrations were high in green algae. Variation within species across two collection times could be related to environmental changes and algal metabolism. δ15N values confirm the efficiency of this parameter as a proxy of the impact of human influence in the Bay of Marseille. Isotopic and biochemical content was measured in 22 Mediterranean macroalgae.Carbon descriptors are related to the metabolism of the specific macroalgal group.Seasonal variation of descriptors correlates with environmental variability. Isotopic and biochemical content was measured in 22 Mediterranean macroalgae. Carbon descriptors are related to the metabolism of the specific macroalgal group. Seasonal variation of descriptors correlates with environmental variability.
title: DETECTIONS OF C-13-SUBSTITUTED C3H2 IN ASTRONOMICAL SOURCES
Creators: name: MADDEN, SC
name: Irvine, William M.
name: MATTHEWS, HE
Publisher: name: University of Massachusetts Amherst
Year: 1986
Subjects: subject: Astrophysics and Astronomy

description: The published version is located at http://adsabs.harvard.edu/full/1986ApJ...311L..27M
Appréhender le Grand Paris aujourd’hui
Creators: name: Roseau, Nathalie
name: Feriel, Loïc Vadelorge Et Cédric
name: Sawyer, Stephen
name: Malversi, Franca
Publisher: name: Collectif Inventer le Grand Paris
Year: 2019

description: Présentation de la journée : Nathalie Roseau (LATTS/ENPC), Loïc Vadelorge (ACP/UPEM), Cédric Feriel (ACP/Labex Futurs Urbains). Première session portant sur les moyens de traduire le Grand Paris tel qu’il est vécu au début du XXIe siècle. Intervenants : Stephen Sawyer (American University of Paris) ; Franca Malversi (CAUE Val-de-Marne).
A Model of the IEEE 802.11 DCF in Presence of Non Ideal Transmission Channel and Capture Effects
Creators: name: Daneshgaran, F.
name: Laddomada, Massimiliano
name: Mesiti, F.
name: Mondin, M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: In this paper, we provide a throughput analysis of the IEEE 802.11 protocol at the data link layer in non-saturated traffic conditions taking into account the impact of both transmission channel and capture effects in Rayleigh fading environment. Impacts of both non-ideal channel and capture become important in terms of the actual observed throughput in typical network conditions whereby traffic is mainly unsaturated, specially in an environment of high interference. We extend the multi-dimensional Markovian state transition model characterizing the behavior at the MAC layer by including transmission states that account for packet transmission failures due to errors caused by propagation through the channel, along with a state characterizing the system when there are no packets to be transmitted in the buffer of a station.
description: Accepted for oral presentation to IEEE Globecom 2007, Washington D.C., November 2007
Neutrino emissivity and bulk viscosity of iso-CSL quark matter in neutron stars
Creators: name: Blaschke, David B.
name: Berdermann, Jens
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We present results for neutrino emissivities and bulk viscosities of a two-flavor color superconducting quark matter phase with isotropic color-spin-locked (iso-CSL) single-flavor pairing which fulfill the constraints on quark matter derived from cooling and rotational evolution of compact stars. We compare with results for the phenomenologically successful, but yet heuristic 2SC+X phase.
description: 6 pages, 2 figures, to appear in the proceedings of QCD@Work 2007, Martina Franca (Italy)
Effect of finite temperature and uniaxial anisotropy on the Casimir effect with three-dimensional topological insulators
Creators: name: Grushin, Adolfo G.
name: Rodriguez-Lopez, Pablo
name: Cortijo, Alberto
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: In this work we study the Casimir effect with three-dimensional topological insulators including the effects of temperature and uniaxial anisotropy. Although precise experimental values for the optical properties of these materials are yet to be established, qualitative analysis is still possible. We find qualitatively that the reported repulsive behavior and the equilibrium point are robust features of the system, and are favored by low temperatures and the enhancement of the optical response parallel to the optical axis. The dependence of the equilibrium point with temperature and with the topological magnetoelectric polarizability characteristic of three-dimensional topological insulators is also discussed.
description: 17 pages, 7 figures. Published version
A deep i-selected multi-waveband galaxy catalogue in the COSMOS field
Creators: name: Gabasch, A.
name: Goranova, Y.
name: Hopp, U.
name: Noll, S.
name: Pannella, M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In this paper we present a deep and homogeneous i-band selected multi-waveband catalogue in the COSMOS field covering an area of about 0.7 square-degree. Our catalogue with a formal 50 percent completeness limit for point sources of i~26.7 comprises about 290.000 galaxies with information in 8 passbands. We combine publicly available u, B, V, r, i, z, and K data with proprietary imaging in H band. We discuss in detail the observations, the data reduction, and the photometric properties of the H-band data. We estimate photometric redshifts for all the galaxies in the catalogue. A comparison with 162 spectroscopic redshifts in the redshift range 0 < z < 3 shows that the achieved accuracy of the photometric redshifts is (Delta_z / (z_spec+1)) ~0.035 with only ~2 percent outliers. We derive absolute UV magnitudes and investigate the evolution of the luminosity function evaluated in the rest-frame UV at 1500 Angstrom. There is a good agreement between the LFs derived here and the LFs derived in the FORS Deep Field. We see a similar brightening of M_star and a decrease of phi_star with redshift. The catalogue including the photometric redshift information is made publicly available.
description: 20 pages, 17 figures, accepted for publication in MNRAS; high resulution paper: http://www.mpe.mpg.de/~gabasch/COSMOS/cosmos.pdf
Metadata Management in Scientific Research: an overview
Creators: name: Aversa, Rossella
Publisher: name: Karlsruher Institut für Technologie (KIT)
Year: 2024

description: Metadata management is an important aspect of scientific research, playing a key role in enhancing discoverability, accessibility, and reproducibility of research data.
Effective metadata management practices involve different aspects aligned with the FAIR (Findable, Accessible, Interoperable, and Reusable) principles: the implementation of metadata schema, the adoption of controlled vocabularies, the assignment of unique identifiers, the necessity of versioning and provenance tracking, to name some.
This talk provides a comprehensive overview of metadata management strategies within the context of scientific research.
Dynamic IoT Choreographies
Creators: name: Seeger, Jan
name: Deshmukh, Rohit A.
name: Sarafov, Vasil
name: Bröring, Arne
Publisher: name: arXiv
Year: 2018
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: The Internet of Things is growing at a dramatic rate and extending into various application domains. We have designed, implemented and evaluated a resilient and decentralized system using IoT concepts. We applied it to maintaining the functionality of building automation systems, so that new devices can appear and vanish on-the-fly.
description: Submitted to IEEE Pervasive Computing's special issue "IoT communications". v2: Fixed some typos v3: Extended evaluation section, improved diagrams, small text improvements v4: Accepted version
Visuotopic Cortical Connectivity Underlying Attention Revealed with White-Matter Tractography
Creators: name: Greenberg, Adam S.
name: Verstynen, Timothy
name: Chiu, Yu-Chin
name: Yantis, Steven
name: Schneider, Walter
name: Behrmann, Marlene
Publisher: name: Carnegie Mellon University
Year: 2012
Subjects: subject: 170199 Psychology not elsewhere classified
subject: FOS: Psychology

description: Visual attention selects behaviorally relevant information for detailed processing by resolving competition for representation among stimuli in retinotopically organized visual cortex. The signals that control this attentional biasing are thought to arise in a frontoparietal network of several brain regions, including posterior parietal cortex. Recent studies have revealed a topographic organization in the intraparietal sulcus (IPS) that mirrors the retinotopic organization in visual cortex, suggesting that connectivity between these regions might provide the mechanism by which attention acts on early cortical representations. Using white-matter imaging and functional MRI, we examined the connectivity between two topographic regions of IPS and six retinotopically defined areas in visual cortex. We observed a strong positive correlation between attention modulations in visual cortex and connectivity of posterior IPS, suggesting that these white-matter connections mediate the attention signals that resolve competition among stimuli for representation in visual cortex. Furthermore, we found that connectivity between IPS and V1 consistently respects visuotopic boundaries, whereas connections to V2 and V3/VP disperse by 60%. This pattern is consistent with changes in receptive field size across regions and suggests that a primary role of posterior IPS is to code spatially specific visual information. In summary, we have identified white-matter pathways that are ideally suited to carry attentional biasing signals in visuotopic coordinates from parietal control regions to sensory regions in humans. These results provide critical evidence for the biased competition theory of attention and specify neurobiological constraints on the functional brain organization of visual attention.
Bounds on Negative Binomial Approximation to Call Function
Creators: name: N. Kumar, Amit
Publisher: name: REVSTAT-Statistical Journal
Year: 2024

description: In this paper, we develop Stein's method for negative binomial distribution using call function defined by fz(k) = (k - z)+ = max{k - z, 0}, for k ≥ 0 and z ≥ 0. We obtain error bounds between E [ fz(Nr,p)] and E [ fz(V )], where Nr,p follows negative binomial distribution and V is the sum of locally dependent random variables, using certain conditions on moments. We demonstrate our results through an interesting application, namely, collateralized debt obligation (CDO), and compare the bounds with the existing bounds.
description: REVSTAT-Statistical Journal, Vol. 22 No. 1 (2024): REVSTAT-Statistical Journal
Flag fault-tolerant error correction, measurement, and quantum computation for cyclic CSS codes
Creators: name: Tansuwannont, Theerapat
name: Chamberland, Christopher
name: Leung, Debbie
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Flag qubits have recently been proposed in syndrome extraction circuits to detect high-weight errors arising from fewer faults. The use of flag qubits allows the construction of fault-tolerant protocols with the fewest number of ancillas known to-date. In this work, we prove some critical properties of CSS codes constructed from classical cyclic codes that enable the construction of a flag fault-tolerant error correction scheme. We then develop fault-tolerant protocols as well as a family of circuits for flag fault-tolerant error correction and operator measurement, requiring only four ancilla qubits and applicable to cyclic CSS codes of distance 3. The measurement protocol can be further used for logical Clifford gate implementation via quantum gate teleportation. We also provide examples of cyclic CSS codes with large encoding rates.
description: 17 pages, 7 figures, Comments welcome. V2: added operator measurement protocol and applications. V3: simpler proofs, minor correction
The influence of mergers on the cluster temperature function and cosmological parameters derived from it
Creators: name: Angrick, Christian
name: Bartelmann, Matthias
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We develop a parameter-free analytic model to include the effects of mergers into the theoretical modelling of the X-ray temperature function of galaxy clusters. We include this description into our model for the cluster population based on fluctuations of the gravitational potential, which avoids any reference to mass. Comparisons with a numerical simulation reveal that the theoretical model is in good agreement with the simulation results. We show that building the model on the dynamics of spherical rather than ellipsoidal collapse yields better results if emission-weighted temperatures are used, while ellipsoidal collapse yields good agreement between model and simulation for mass-weighted temperatures. Analysing two different samples of X-ray clusters, we quantify the influence of mergers and a conversion between different temperature definitions on the joint determination of Omega_m0 and sigma_8. If effects of mergers are included, temperature functions based on cluster masses and on the gravitational potential built on spherical collapse are in good agreement with other cosmological probes without any conversion of temperatures.
description: 12 pages, 6 figures; published in Astronomy and Astrophysics; slight modifications to match the published version
Comparative Analysis of Ronald Mallett's Laser System and the Proton-Antiproton Annihilation Model
Creators: name: Andrea Correnti
Publisher: name: Zenodo
Year: 2025
Subjects: Proton-antiproton annihilation, gravitational field, energy density, frame-dragging, closed timelike curves, lasers

description: This paper presents a comparative analysis of Ronald Mallett's model, which utilizes a ringl aser system to generate gravitational effects based on frame-dragging, and a theoretical model involving proton-antiproton annihilation. The focus is on energy densities, gravitational effects, interactions with spin-zero and spin-1/2 particles, and the potential for generating closed timelike curves (CTCs). Through a detailed analysis, we aim to highlight the differences in energy distribution, gravitational effects, and the feasibility of generating relativistic phenomena, such as CTCs, in both models.
title: Appel/Manifeste "Allègements thérapeutiques pour les séropositifs : ouvrons la voie de l’intermittence des traitements !"
Creators: name: Leibowitch, Jacques
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020

description: Source: http://www.calames.abes.fr/pub/ms/Calames-20193111232830338
description: created: start=1975;end=2018
Visuoperceptual deficits in letter-by-letter reading?
Creators: name: Mycroft, Rachel H.
name: Behrmann, Marlene
name: Kay, Janice
Publisher: name: Carnegie Mellon University
Year: 2009
Subjects: subject: 170199 Psychology not elsewhere classified
subject: FOS: Psychology

description: A longstanding and controversial issue concerns the underlying mechanisms that give rise to letter-by-letter (LBL) reading: while some researchers propose a prelexical, perceptual basis for the disorder, others postulate a postlexical, linguistic source for the problem. To examine the nature of the deficit underlying LBL reading, in three experiments, we compare the performance of seven LBL readers, matched control participants and one brain-damaged patient, OL, with no reading impairment. Experiment 1 revealed that the LBL patients were impaired, relative to the controls and to OL, on a same/different matching task using checkerboards of black and white squares. Given that the perceptual impairment extends beyond abnormalities with alphanumeric stimuli, the findings are suggestive of a more general visual processing deficit. This interpretation was confirmed in Experiments 2 (matching words and symbol strings) and 3 (visual search of letter and symbol targets), which compared the processing of linguistic and non-linguistic written stimuli, matched for visual complexity. In both experiments, the LBL patients displayed qualitatively similar effects of length and left-to-right sequential ordering on linguistic and non-linguistic stimuli. Moreover, there was a clear association between the perceptual impairments on these tasks and the slope of the reading latency function for the LBL patients. Taken together, these findings are consistent with a significant visuoperceptual impairment in LBL that adversely affects reading performance as well as performance on other non-reading tasks.
Search for Massive Long-lived Highly Ionising Particles with the ATLAS Detector at the LHC
Creators: name: The ATLAS Collaboration
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A search is made for massive long-lived highly ionising particles with the ATLAS experiment at the Large Hadron Collider, using 3.1 pb-1 of pp collision data taken at sqrt(s)=7 TeV. The signature of energy loss in the ATLAS inner detector and electromagnetic calorimeter is used. No such particles are found and limits on the production cross section for electric charges 6e <= |q| <= 17e and masses 200 GeV <= m <= 1000 GeV are set in the range 1-12 pb for different hypotheses on the production mechanism.
description: 7 pages plus author list (20 pages total), 5 figures, 6 tables, submitted to Physics Letters B (published version in PLB)
Study on Zografos-Balakrishnan Log-Normal Distribution
Creators: name: Shibu, D. S.
name: Nitin, S. L.
name: Irshad, M. R.
Publisher: name: REVSTAT-Statistical Journal
Year: 2024

description: In this article, we studied a generalization of the log-normal distribution called Zografos-Balakrishnan log-normal distribution and investigate its various important properties and functions including moments, quantile function, various reliability measures, Rényi entropy, and some inequality measures. The estimation of unknown parameters is discussed by the methods of maximum likelihood, and the Bayesian technique and their simulation studies are also carried out. The applicability of the distribution is illustrated utilizing a real dataset. A likelihood ratio test is utilized for testing the efficiency of the third parameter. The effectiveness of this model for the dataset is also established using the parametric bootstrap approach.
description: REVSTAT-Statistical Journal, Vol. 22 No. 1 (2024): REVSTAT-Statistical Journal
Analyticity of dissipative-dispersive systems in higher dimensions
Creators: name: Evripidou, Charalampos
name: Smyrlis, Yiorgos-Sokratis
Publisher: name: arXiv
Year: 2018
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35B65, 35Q35

description: We investigate the analyticity of the attractors of a class of Kuramoto-Sivashinsky type pseudo-differential equations in higher dimensions, which are periodic in all spatial variables and possess a universal attractor. This is done by fine-tuning the techniques used in a previous work of the second author, which are based on an analytic extensibility criterion involving the growth of $\nabla^n u$, as $n$ tends to infinity (here $u$ is the solution). These techniques can now be utilised in a variety of higher dimensional equations possessing universal attractors, including Topper--Kawahara equation, Frenkel--Indireshkumar equations and their dispersively modified analogs. We prove that the solutions are analytic whenever $γ$, the order of dissipation of the pseudo-differential operator, is higher than one. We believe that this estimate is optimal, based on numerical evidence.
description: 7 pages
On the Matter of N=2 Matter
Creators: name: Doran, C. F.
name: Faux, M. G.
name: Gates,, S. J.
name: Hubsch, T.
name: Iga, K. M.
name: Landweber, G. D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We introduce a variety of four-dimensional N = 2 matter multiplets which have not previously appeared explicitly in the literature. Using these, we develop a class of supersymmetric actions supplying a context for a systematic exploration of N = 2 matter theories, some of which include Hypermultiplet sectors in novel ways. We construct an N = 2 supersymmetric field theory in which the propagating fields are realized off-shell exclusively as Lorentz scalars and Weyl spinors and which involves a sector with precisely the R-charge assignments characteristic of Hypermultiplets.
description: 11 pages, 2 figures, PDF LaTeX
Implementation and validation of rapid diagnostic procedures for Xylella fastidiosa
Creators: name: Loconsole Giuliana
Publisher: name: Zenodo
Year: 2019
Subjects: diagnosis, validation, rapid detection, Xylella fastidiosa

description: Surveys for Xylella fastidiosa are now mandatory in the EU Member States and genetically diverse strains, i.e. those capable of infecting different hosts, have been intercepted in the currently known EU outbreaks and/or containment areas. Given the long list of the EU susceptible host plants, currently comprising more than 50 plant species, there is an compelling need to develop robust and rapid diagnostic tests (ready-to-use and on-site tests) suitable for testing and screening different plant matrices and large numbers of samples. To this end, we have compared membrane-capture-based methods and ready-to-use kits, the latter based on isothermal nucleic acid amplification techniques. Indeed, a chloroform-free method based on the use of the Maxwell® RSC PureFood GMO and Authentication Kit (Promega) was evaluated on different plant matrices, as an alternative protocol for recovering total DNA suitable for identifying X. fastidiosa in real-time PCR (qPCR) reactions, so far the most widely used diagnostic method. In a first validation test, 90 olive field-trees were tested simultaneously using different procedures: FTA-ELISA, DTBIA, qPCR assay on membrane-captured DNA, loop-mediated isothermal amplification/LAMP on fresh sap or on stored tissue-imprinted membranes, and recombinase polymerase amplification/RPA.Performance criteria for each test were determined by comparing the results with those obtained in qPCR assays performed according to Harper et al. (2010). The results, while suggesting that different types of membranes can be used for capturing bacterial cells for a subsequent serological or molecular detection, showed that all these approaches produced lower accuracy values than LAMP, RPA and standard qPCR. The chloroform-free DNA purification kit herein tested made it possible to recover DNA templates of high quality with standardised yields, suitable for the detection of the bacterium using the qPCR protocols currently validated for X. fastidiosa.
Visualizing 3D objects from 2D cross sectional images displayed in-situ versus ex-situ.
Creators: name: Wu, Bing
name: Klatzky, Roberta
name: Stetten, George D.
Publisher: name: Carnegie Mellon University
Year: 2010
Subjects: subject: 170199 Psychology not elsewhere classified
subject: FOS: Psychology

description: The present research investigates how mental visualization of a 3D object from 2D cross sectional images is influenced by displacing the images from the source object, as is customary in medical imaging. Three experiments were conducted to assess people's ability to integrate spatial information over a series of cross sectional images in order to visualize an object posed in 3D space. Participants used a hand-held tool to reveal a virtual rod as a sequence of cross-sectional images, which were displayed either directly in the space of exploration (in-situ) or displaced to a remote screen (ex-situ). They manipulated a response stylus to match the virtual rod's pitch (vertical slant), yaw (horizontal slant), or both. Consistent with the hypothesis that spatial colocation of image and source object facilitates mental visualization, we found that although single dimensions of slant were judged accurately with both displays, judging pitch and yaw simultaneously produced differences in systematic error between in-situ and ex-situ displays. Ex-situ imaging also exhibited errors such that the magnitude of the response was approximately correct but the direction was reversed. Regression analysis indicated that the in-situ judgments were primarily based on spatiotemporal visualization, while the ex-situ judgments relied on an ad hoc, screen-based heuristic. These findings suggest that in-situ displays may be useful in clinical practice by reducing error and facilitating the ability of radiologists to visualize 3D anatomy from cross sectional images.
Production of picosecond, kilojoule, petawatt laser pulses via Raman amplification of nanosecond pulses
Creators: name: Trines, R.
name: Fiuza, F.
name: Bingham, R.
name: Fonseca, R. A.
name: Silva, L. O.
name: Cairns, R. A.
name: Norreys, P. A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Raman amplification in plasma has been promoted as a means of compressing picosecond optical laser pulses to femtosecond duration to explore the intensity frontier. Here we show for the first time that it can be used, with equal success, to compress laser pulses from nanosecond to picosecond duration. Simulations show up to 60% energy transfer from pump to probe pulses, implying that multi-kiloJoule ultra-violet petawatt laser pulses can be produced using this scheme. This has important consequences for the demonstration of fast-ignition inertial confinement fusion.
description: Minor revision to fix problem with image rendering
Open Problems, Questions, and Challenges in Finite-Dimensional Integrable Systems
Creators: name: Bolsinov, A.
name: Matveev, V.
name: Miranda, E.
name: Tabachnikov, S.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Dynamical Systems (math.DS)
subject: Differential Geometry (math.DG)
subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics

description: The paper surveys open problems and questions related to different aspects of integrable systems with finitely many degrees of freedom. Many of the open problems were suggested by the participants of the conference "Finite-dimensional Integrable Systems, FDIS 2017" held at CRM, Barcelona in July 2017.
Visual Perceptual Organization: Lessons From lesions
Creators: name: Behrmann, Marlene
name: Kimchi, Ruth
Publisher: name: Carnegie Mellon University
Year: 2003
Subjects: subject: 170199 Psychology not elsewhere classified
subject: FOS: Psychology

description: The visual world consciously perceived is very different from the chaotic Juxtaposition of different colors and shapes that stimulate the individual retinal receptors. Objects are seen as detached and separable from adjacent objects and surfaces despite the fact that parts of a single object may be spatially Of temporally discontinuous, and have different colors or even transect several different depth planes. Additionally. because most surfaces are opaque, portions of objects are routinely hidden from View, and, as we move around. surfaces continually undergo occlusion and fragmentation. As IS apparent from this description. the objects of phenomenal perception are not given in any direct way in the retinal image. Some Internal processes of organization must clearly be responsible, then. for producing a Single, coherent percept. Exactly what these processes are remains poorly understood despite the roughly 100 years since the Gestalt psychologists first articulated the principles of perceptual organization. Although the Gestalt work on perceptual organization has been widely accepted as identifying crucial phenomena of perception. there has been, until the last decade or so, relatively little theoretical and empirical emphasis on perceptual organization with a few exceptions. And, to the extent that progress has been made, there still remain many open questions. In this chapter, we explore some of these open Issues in light of data we have obtained through a series of neuropsychological Investigations with individuals who are impaired in perceptual organization following brain damage, hence the title of this chapter.