cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Magneto-optics of general pseudospin-s two-dimensional Dirac-Weyl fermions
Creators: name: Malcolm, John D.
name: Nicol, Elisabeth J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The popularity of graphene--a pseudospin-1/2 two-dimensional Dirac-Weyl material--has prompted the search for related materials and the characterization of their properties. In this work, the magneto-optical conductivity is calculated for systems that obey the general pseudospin-s two-dimensional Dirac-Weyl Hamiltonian, with particular focus on s = {1/2, 1, 3/2, 2}. This generalizes calculations that have been made for s = 1/2 and follows previous work on the optical response of these systems in zero field. In the presence of a magnetic field, Landau levels condense out of the 2s+1 energy bands. As the chemical potential in a system is shifted, patterns arise in the appearance and disappearance of certain peaks within the optical spectra. These patterns are markedly different for each case considered, creating unique signatures in the magneto-optics. The general structure of each spectrum and how they compare is discussed.
description: Accepted for publication in Physical Review B; 15 pages, 16 figures
Simultaneous quantification of GABAergic 3α,5α/3α,5β neuroactive steroids in human and rat serum
Creators: name: O’Buckley, Todd K.
name: Girdler, Susan S.
name: Alward, Sarah E.
name: Porcu, Patrizia
name: Shampine, Lawrence J.
name: Marx, Christine E.
name: Morrow, A. Leslie
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2009

description: The 3α,5α- and 3α,5β-reduced derivatives of progesterone, deoxycorticosterone, dehydroepiandrosterone and testosterone enhance GABAergic neurotransmission and produce inhibitory neurobehavioral and anti-inflammatory effects. Despite substantial information on the progesterone derivative (3α,5α)-3-hydroxypregnan-20-one (3α,5α-THP, allopregnanolone), the physiological significance of the other endogenous GABAergic neuroactive steroids has remained elusive. Here, we describe the validation of a method using gas chromatography-mass spectrometry to simultaneously identify serum levels of the eight 3α,5α- and 3α,5β-reduced derivatives of progesterone, deoxycorticosterone, dehydroepiandrosterone and testosterone. The method shows specificity, sensitivity and enhanced throughput compared to other methods already available for neuroactive steroid quantification. Administration of pregnenolone to rats and progesterone to women produced selective effects on the 3α,5α- and 3α,5β-reduced neuroactive steroids, indicating differential regulation of their biosynthetic pathways. Pregnenolone administration increased serum levels of 3α,5α-THP (+1488%, p<0.001), (3α,5α)-3,21-dihydroxypregnan-20-one (3α,5α-THDOC, +205%, p<0.01), (3α,5α)-3-hydroxyandrostan-17-one (3α,5α-A, +216%, p<0.001), (3α,5α,17β)-androstane-3,17-diol (3α,5α-A-diol, +190%, p<0.01). (3α,5β)-3-hydroxypregnan-20-one (3α,5β-THP) and (3α,5β)-3-hydroxyandrostan-17-one (3α,5β-A) were not altered, while (3α,5β)-3,21-dihydroxypregnan-20-one (3α,5β-THDOC) and (3α,5β,17β)-androstane-3,17-diol (3α,5β-A-diol) were increased from undetectable levels to 271 ± 100 and 2.4 ± 0.9 pg ± SEM, respectively (5/8 rats). Progesterone administration increased serum levels of 3α,5α-THP (+1806%, p<0.0001), 3α,5β-THP (+575%, p<0.001), 3α,5α-THDOC (+309%, p<0.001). 3α,5β-THDOC levels were increased by 307%, although this increase was not significant because this steroid was detected only in 3/16 control subjects. Levels of 3α,5α-A, 3α,5β-A and pregnenolone were not altered. This method can be used to investigate the physiological and pathological role of neuroactive steroids and to develop biomarkers and new therapeutics for neurological and psychiatric disorders.
8-Alkylthio-6-thio-substituted theophylline analogues as selective noncompetitive progesterone receptor antagonists
Creators: name: Berg, Kenneth C.
name: Nordeen, Steven K.
name: Wilson, Elizabeth M.
name: Mollo, Andy R.
name: Shapiro, David J.
name: Aninye, Irene O.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2012

description: The progesterone receptor (PR) plays a key role in reproduction and is important in cancers of the reproductive tract. Current PR antagonists usually compete for progestin binding in the PR ligand-binding pocket and often exhibit cross-binding with other members of the steroid receptor family. Using stably transfected cells expressing reporter genes, a set of ~150 theophylline analogues were screened for their ability to inhibit progesterone, estrogen, glucocorticoid and androgen signaling. The structure-activity studies presented here identify branched 8-alkylthio-6-thio-substitutions of theophylline as selective PR inhibitors. 6-thio-8-(2-ethylbutyl)thiotheophylline (51), the most extensively studied derivative, does not act by competing with progestins for binding in the ligand-binding pocket of PR. It demonstrated the ability to inhibit the mouse mammary tumor virus (MMTV)-luciferase reporter and endogenous PR-regulated alkaline phosphatase activity in T47D breast cancer cells. Compound 51 is the lead member of a novel class of PR inhibitors that act outside the PR ligand-binding pocket, thus serving as a novel probe to investigate PR action and a lead for further development.
Il perduto soffitto ligneo del cardinale Niccolò Gaddi per la Cattedrale di Cosenza (1545-1547)
Creators: name: Mussari, Bruno
Publisher: name: Opus Incertum
Year: 2018

description: Niccolò Gaddi (1527-1552), Florentine Cardinal, archbishop of Cosenza from 1528 to 1535 and administrator of the diocese of Calabria until 1549, commissioned Bartolomeo della Scala of Pietrasanta with the construction of a wooden coffered ceiling for the Cathedral of Cosenza. An 18thcentury manuscript chronicle and some notarial acts of 1545 and 1546 document that he was already active in Calabria in those years. The coffered ceiling no longer exists, but this paper proposes a possible reconstructed configuration, based on the description contained in the assignment document. It was to be based on some famous Florentine and Roman examples, dating back to the second half of the 15th century, which were certainly known to the stonemasons and workers involved. The wooden coffered ceiling of Cosenza is the first known in Calabria, and thus it can be considered as the local reference for subsequent regional applications. It is also witness to the spread of the forms and architectural languages of the Renaissance in Calabria, introduced by a sophisticated commission and expert Tuscan craftsmen, whose presence was due to the widespread phenomenon of migratory flows of workers.
description: Opus Incertum, Vol 3 (2017)
Intergenerational effects of cocaine on maternal aggressive behavior and brain oxytocin in rat dams: Research Report
Creators: name: Hofler, V. E.
name: Black, M. A.
name: Jarrett, T. M.
name: Joyner, P. W.
name: Elliott, D. L.
name: Johns, J. M.
name: McMurray, M. S.
name: Middleton, C. W.
name: Walker, C. H.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2008

description: Gestational cocaine treatment results in significantly increased maternal aggression towards an intruder by postpartum day six, while acute postpartum treatment dose dependently decreases maternal aggressive (MA) behavior. Both increased and decreased aggression in the cocaine-treated dams are correlated with either decreased or increased levels of oxytocin in the amygdala, respectively. The current study was an effort to determine whether the effect of gestational cocaine on maternal aggression is transient or would continue into the postpartum period; whether an intermittent cocaine treatment regimen, which incorporates gestational and postpartum intermittent cocaine treatment, would differ from chronic daily gestational treatment; and finally, whether next generation female offspring of cocaine-treated or control dams would have altered MA behavior and oxytocin system changes attributable to either prenatal drug exposure, rearing condition or both. We now report no increase in maternal aggression following chronic gestational treatment and significantly lower levels of aggression in intermittently treated dams on postpartum day eight, with no significant effects in either group on postpartum day 12. Young adult female offspring of the cocaine-treated and control dams, who reared their own natural litters and were tested on postpartum day eight for maternal aggression, had higher levels of maternal aggression towards an intruder attributable to both prenatal cocaine exposure and rearing condition. Higher aggression in cocaine-reared next generation dams was associated with lower levels of oxytocin in the amygdala. Intergenerational effects of cocaine were apparent with respect to aggression and oxytocin system changes.
Application of the phase space action principle to finite-size particle plasma simulations in the drift-kinetic approximation
Creators: name: Evstatiev, E. G.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: We formulate a finite-size particle numerical model of strongly magnetized plasmas in the drift-kinetic approximation. We use the phase space action as an alternative to previous variational formulations based on Low's Lagrangian or on a Hamiltonian with a non-canonical Poisson bracket. The useful property of this variational principle is that it allows independent transformations of particle coordinates and velocities, i.e., transformations in particle phase space. With such transformations, a finite degree-of-freedom drift-kinetic action is obtained through time-averaging of the finite degree-of-freedom fully-kinetic action. Variation of the drift-kinetic Lagrangian density leads to a self-consistent, macro-particles and fields numerical model. Since the computational particles utilize only guiding center coordinates and velocities, there is a large computational advantage in the time integration part of the algorithm. Numerical comparison between the time-averaged fully-kinetic and drift-kinetic charge and current, deposited on a computational grid, offers insight into the range of validity of the model. Being based on a variational principle, the algorithm respects the energy conserving property of the underlying continuous system. The development in this paper serves to further emphasize the advantages of using variational approaches in plasma particle simulations.
description: 8 pages, 3 figures; this version with minor modifications
Solai lignei veneziani in età moderna. Qualche osservazione sulle tecniche e i materiali attraverso un caso di studio
Creators: name: Ceriani Sebregondi, Giulia
Publisher: name: Opus Incertum
Year: 2018

description: Starting from specific case studies of little transformed buildings, particularly well documented in the archive records, and for which direct observation is possible, more general considerations can be drawn in search of the knowledge that allows us to reconstruct the work site of past centuries. The case study presented is that of the palace erected ex novo in Venice by the doge Leonardo Donà dalle Rose in 1610-12, whose building records allow us to reconstruct in detail the supply system, the types of wood used, the techniques, and the lexicon of early modern Venetian carpentry, including the use of ‘composed beams’. It confirms that, compared to central Italy, in early modern Venice, in almost all cases the single-layered timber structure of the floor remains exposed and uses beams placed very close to each other, thus providing a spatial rhythm to the ceiling and directly supporting a series of timber planks.Venetian buildings, in fact, in order to not overload the foundation ground and to confer some flexibility to the structure, respond to the concept of box-like lightweight structures. In addition to regularity, these slabs, then, also have the advantage of providing a uniform distribution of loads on the masonry, and with their strong joints result in a sufficiently rigid plate that braces the slender walls.
description: Opus Incertum, Vol 3 (2017)
Promoter Polymorphisms in the Nitric Oxide Synthase 3 Gene Are Associated With Ischemic Stroke Susceptibility in Young Black Women
Creators: name: Meyers, D. A.
name: Wozniak, M. A.
name: Howard, T. D.
name: Kittner, S. J.
name: Basehore, M. J.
name: Macko, R. F.
name: Giles, W. H.
name: Cole, J. W.
name: Malarcher, A. M.
name: Lange, L. A.
name: Xu, J.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2005

description: Endothelial nitric oxide exerts a variety of protective effects on endothelial cells and blood vessels, and therefore the nitric oxide synthase 3 gene (NOS3) is a logical candidate gene for stroke susceptibility.
Metastability and low lying spectra in reversible Markov chains
Creators: name: Bovier, Anton
name: Eckhoff, Michael
name: Gayrard, Veronique
name: Klein, Markus
Publisher: name: Weierstrass Institute
Year: 2000
Subjects: subject: Markov chains
subject: metastability
subject: eigenvalue problems
subject: exponential distribution
subject: 60J10
subject: 60K35

description: We study a large class of reversible Markov chains with discrete state space and transition matrix $P_N$. We define the notion of a set of it metastable points as a subset of the state space $G_N$ such that (i) this set is reached from any point $xin G_N$ without return to $x$ with probability at least $b_N$, while (ii) for any two point $x,y$ in the metastable set, the probability $T^-1_x,y$ to reach $y$ from $x$ without return to $x$ is smaller than $a_N^-1ll b_N$. Under some additional non-degeneracy assumption, we show that in such a situation: item(i) To each metastable point corresponds a metastable state, whose mean exit time can be computed precisely. item(ii) To each metastable point corresponds one simple eigenvalue of $1-P_N$ which is essentially equal to the inverse mean exit time from this state. Moreover, these results imply very sharp uniform control of the deviation of the probability distribution of metastable exit times from the exponential distribution.
Acute stroke imaging research roadmap II
Creators: name: Powers, W. J.
name: Fiebach, J. B.
name: Wintermark, M.
name: Ostergaard, L.
name: Bammer, R.
name: Alexandrov, A. V.
name: Hacke, W.
name: Kidwell, C. S.
name: Schellinger, P.
name: Furie, K. L.
name: Fisher, M.
name: Eastwood, J. D.
name: Alger, J. R.
name: Liebeskind, D. S.
name: Derdeyn, C. P.
name: Sorensen, A. G.
name: Lees, K. R.
name: Provenzale, J.
name: Wardlaw, J.
name: Koroshetz, W.
name: Donnan, G. A.
name: Davis, S.
name: Wu, O.
name: Silbergleit, R.
name: Albers, G. W.
name: Kloska, S. P.
name: Kohrmann, M.
name: Lev, M. H.
name: Goldmakher, G. V.
name: Baron, J. C.
name: Lee, T. Y.
name: Demaerschalk, B. M.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2008

description: The recent “Advanced Neuroimaging for Acute Stroke Treatment” meeting on September 7 and 8, 2007 in Washington DC, brought together stroke neurologists, neuroradiologists, emergency physicians, neuroimaging research scientists, members of the National Institute of Neurological Disorders and Stroke (NINDS), the National Institute of Biomedical Imaging and Bioengineering (NIBIB), industry representatives, and members of the US Food and Drug Administration (FDA) to discuss the role of advanced neuroimaging in acute stroke treatment. The goals of the meeting were to assess state-of-the-art practice in terms of acute stroke imaging research and to propose specific recommendations regarding: (1) the standardization of perfusion and penumbral imaging techniques, (2) the validation of the accuracy and clinical utility of imaging markers of the ischemic penumbra, (3) the validation of imaging biomarkers relevant to clinical outcomes, and (4) the creation of a central repository to achieve these goals. The present article summarizes these recommendations and examines practical steps to achieve them.
D5.5 Workflows of the self-learning algorithms.
Creators: name: Van Der Klauw, Thijs
name: Bulut, Yasin
name: Kornaat, Wim
name: Borsboom, Wouter
name: Driessen, Bart
Publisher: name: Zenodo
Year: 2023

description: This deliverable describes the workflow for calibrating Energy Models and Indoor Environmental Quality models using monitoring data. It is the result of task 5.4 “Self learning BIMBOTS” of WP5 “Operational Tools Implementation” of the Sphere project.
Existence and approximation of solutions to an anisotropic phase field system of Penrose-Fife type
Creators: name: Klein, Olaf
Publisher: name: Weierstrass Institute
Year: 2000
Subjects: subject: Phase-field model
subject: Penrose-Fife model
subject: anisotropie
subject: semidiscretization
subject: convergence
subject: 65M12
subject: 35K50
subject: 80A22
subject: 35K60
subject: 35R35

description: This paper is concerned with a phase field system of Penrose-Fife type for a non-conserved order parameter χ with a kinetic relaxation coefficient depending on the gradient of χ. This system can be used to model the dendritic solidification of liquids. A time discrete scheme for an initial-boundary value problem tothis system is presented. By proving the convergence of this scheme, the existence of a solution to the problem is shown.
त्रिपुरा की टीला भूमि में तिरपाल टैंक आधारित मछली पालन: एक अभिनव मॉडल और सफलता की कहानी
Creators: name: धलोंगसैह रियांग*, अरुण शर्मा, अजीत कुमार वर्मा, सुनील कुमार नायक, सुखम एस. मुनिलकुमार
Publisher: name: The Science world a Monthly e magazine
Year: 2024

description: प्रस्तावना

            तुइमुक ब्रोइ मथो एक महिला-आधारित गैर सरकारी संगठन है जो सरकार के तहत पंजीकृत चुंगमारी सोसायटी के तहत काम करता है। त्रिपुरा के इस एनजीओ में सभी महिला सदस्य शामिल हैं। सोसायटी की आय का स्रोत विभिन्न गतिविधियों जैसे रबर की खेती, मुर्गी पालन, पशुपालन, मोमबत्ती बनाना और अन्य कृषि संबद्ध गतिविधियों पर आधारित है। संगठन की आय सृजन के लिए अन्य गतिविधियों में एसएचजी के सदस्यों को वित्तीय ऋण देना और ब्याज के माध्यम से कमाई करना शामिल है।
Hemostatic and Inflammatory Risk Factors for Intracerebral Hemorrhage in a Pooled Cohort
Creators: name: Rosamond, W. D.
name: Sturgeon, J. D.
name: Cushman, M.
name: Folsom, A. R.
name: Shahar, E.
name: Longstreth, W.T.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2008

description: To identify novel risk factors for intracerebral hemorrhagic stroke (ICH)
Pathwise description of dynamic pitchfork bifurcations with additive noise
Creators: name: Berglund, Nils
name: Gentz, Barbara
Publisher: name: Weierstrass Institute
Year: 2000
Subjects: subject: Dynamic bifurcation
subject: pitchfork bifurcation
subject: additive noise
subject: bifurcation delay
subject: singular perturbations
subject: stochastic differential equations
subject: random dynamical systems
subject: pathwise description
subject: concentration of measure
subject: 37H20
subject: 60H10
subject: 34E15
subject: 93E03

description: The slow drift (with speed e) of a parameter through a pitchfork bifurcation point, known as the dynamic pitchfork bifurcation, is characterized by a significant delay of the transition from the unstable to the stable state. We describe the effect of an additive noise, of intensity s, by giving precise estimates on the behaviour of the individual paths. We show that until time e1/2 after the bifurcation, the paths are concentrated in a region of size s/e1/4 around the bifurcating equilibrium. With high probability, they leave a neighbourhood of this equilibrium during a time interval [e1/2, c (e log s )1/2], after which they are likely to stay close to the corresponding deterministic solution. We derive exponentially small upper bounds for the probability of the sets of exceptional paths, with explicit values for the exponents.
Sleep Duration and Risk of Ischemic Stroke in Postmenopausal Women * Supplemental Appendix
Creators: name: Stefanick, M. L.
name: Brunner, R. L.
name: Chen, J.-C.
name: Naughton, M. J.
name: Wassertheil-Smoller, S.
name: Larson, J. C.
name: Allison, M.
name: Levine, D. W.
name: Ren, H.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2008

description: Many studies have shown a U-shape association between sleep duration and mortality, but epidemiological evidence linking cardiovascular diseases (CVD) with habitual sleep patterns is limited and mixed.
A New Picture for the Formation and Decay of the Exotic $XY \! Z$ Mesons
Creators: name: Brodsky, Stanley J.
name: Hwang, Dae Sung
name: Lebed, Richard F.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a new dynamical picture that identifies the formation of the exotic $\bar c c$-containing states $XY \! Z$ with the confinement-induced hadronization of a rapidly separating pair of a compact diquark and antidiquark. This picture combines the advantages of diquark-based models, which can accommodate much of the known $XY \! Z$ spectrum, with the experimental fact that such states are both relatively narrow and are produced promptly. It also naturally explains the preference of some of the exotic states to decay to $ψ(2S)$, rather than $J/ψ$, in terms of a simple wave-function overlap effect.
description: 5 pages, 4 .eps figures, ReVTeX. References added
Evaluation of MR-Derived Cerebral Oxygen Metabolic Index in Experimental Hyperoxic Hypercapnia, Hypoxia, and Ischemia
Creators: name: Liu, Q.
name: Chen, Y.
name: Lin, W.
name: An, H.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2009

description: A non-invasive MRI method to measure cerebral oxygen metabolism has the potential to assess tissue viability during cerebral ischemia. The purposes of this study were 1) to validate MR oxygenation measurements across a wide range of global cerebral oxygenation; and 2) to examine the spatiotemporal evolution of oxygen metabolism during focal middle cerebral artery occlusion (MCAO) in rats.
title: Why do Different LLMs Give Different Answers to the Same Question? Model Uncertainty and Variability in LLM-based Intrusion Detection Systems Ranking
Creators: name: Calloway, Charlise
Publisher: name: Old Dominion University
publisherIdentifier: https://ror.org/04zjtrb98
publisherIdentifierScheme: ROR
Year: 2025

description: Large Language Models (LLMs) are increasingly applied across business, education, and cybersecurity domains. However, LLMs can yield varied outputs for the same query due to differences in architecture, training data, and response generation mechanisms. This paper examines model variability and uncertainty by comparing the responses of three LLMs—ChatGPT-4o, Gemini 2.0 Flash, and DeepSeek-V3--to a query on ranking practical intrusion detection systems (IDS). The analysis highlights key similarities and differences in the models’ outputs, offering insight into their respective reasoning and consistency.
Impulsive energy release and non-thermal emission in a confined M4.0 flare triggered by rapidly evolving magnetic structures
Creators: name: Kushwaha, Upendra
name: Joshi, Bhuwan
name: Cho, Kyung-Suk
name: Veronig, Astrid
name: Tiwari, Sanjiv Kumar
name: Mathew, S. K.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present observations of a confined M4.0 flare from NOAA 11302 on 2011 September 26. Observations at high temporal, spatial, and spectral resolution from Solar Dynamics Observatory, Reuven Ramaty High Energy Solar Spectroscopic Imager, and Nobeyama Radioheliograph enabled us to explore the possible triggering and energy release processes of this flare despite its very impulsive behavior and compact morphology. The flare light curves exhibit an abrupt rise of non-thermal emission with co-temporal hard X-ray (HXR) and microwave (MW) bursts that peaked instantly without any precursor emission. This stage was associated with HXR emission up to 200 keV that followed a power law with photon spectral index ($δ$) $\sim$3. Another non-thermal peak, observed 32 s later, was more pronounced in the MW flux than the HXR profiles. Dual peaked structure in the MW and HXR light curves suggest a two-step magnetic reconnection process. Extreme ultraviolet (EUV) images exhibit a sequential evolution of the inner and outer core regions of magnetic loop system while the overlying loop configuration remained unaltered. Combined observations in HXR, (E)UV, and H$α$ provide support for flare models involving interaction of coronal loops. The magnetograms obtained from Helioseismic and Magnetic Imager (HMI) reveal the emergence of magnetic flux which started $\sim$5 hr before the flare. However, the more crucial changes in the photospheric magnetic flux occurred about 1 minute prior to the flare onset with opposite polarity magnetic transients appearing at the early flare location within the inner core region. The spectral, temporal, and spatial properties of magnetic transients suggest that the sudden changes in the small-scale magnetic field have likely triggered the flare by destabilizing the highly sheared pre-flare magnetic configuration.
description: 18 pages, Accepted for publication in ApJ
Lipoprotein-Associated Phospholipase A2 and High-Sensitivity C-Reactive Protein Improve the Stratification of Ischemic Stroke Risk in the Atherosclerosis Risk in Communities (ARIC) Study
Creators: name: Folsom, A. R.
name: Mosley, T.
name: Coresh, J.
name: Sharrett, R.
name: Chambless, L.
name: Hu, Y.
name: Ni, H.
name: Nambi, V.
name: Hoogeveen, R. C.
name: Boerwinkle, E.
name: Bang, H.
name: Ballantyne, C. M.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2009

description: Inflammation plays a critical role in the development of vascular disease, and increased levels of the inflammatory biomarkers, lipoprotein-associated phospholipase A2 (Lp-PLA2), and high-sensitivity C-reactive protein (hs-CRP) have been shown to be associated with an increased risk for ischemic stroke.
Uniqueness of determining a periodic structure from discrete far field observations
Creators: name: Bruckner, Gottfried
name: Cheng, Jin
name: Yamamoto, Masahiro
Publisher: name: Weierstrass Institute
Year: 2000
Subjects: subject: inverse problems
subject: uniqueness
subject: Helmholtz equation
subject: diffractive optics
subject: discrete observations
subject: 35R30
subject: 35J05
subject: 78A46

description: This paper is devoted to the uniqueness in the inverse scattering problem of determining a perfectly reflecting periodic surface from far field observations on a discrete set. Our proof is based on the unique continuation of the solution to the Helmholtz equation from a discrete set.
Alcohol and Acute Ischemic Stroke Onset: The Stroke Onset Study
Creators: name: Mukamal, K. J.
name: Schlaug, G.
name: Mostofsky, E.
name: Mittleman, M. A.
name: Rosamond, W. D.
name: Burger, M. R.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2010

description: Previous research suggests that regular heavy alcohol consumption increases the risk for ischemic stroke, whereas frequent light to moderate alcohol intake may decrease the risk. However, the risk of ischemic stroke associated with transient exposure to alcohol remains unclear. In this study, we used a case-crossover approach to test the hypothesis that alcohol consumption affects the acute risk of ischemic stroke, to determine the length of time between alcohol intake and the onset of symptoms (induction time) and to examine whether the risk varies by the type of alcohol.
On the Gibbsian nature of the random field Kac model under block-averaging
Creators: name: Külske, Christof
Publisher: name: Weierstrass Institute
Year: 2000
Subjects: subject: Kac-model
subject: random field model
subject: Gibbs-measures
subject: renormalization group transformations
subject: 82B44
subject: 82B28
subject: 82B20

description: We consider the Kac-Ising model in an arbitrary configuration of local magnetic fields η = (ηi)i∈퐙d, in any dimension d, at any inverse temperature. We investigate the Gibbs properties of the 'renormalized' infinite volume measures obtained by block averaging any of the Gibbs-measures corresponding to fixed η, with block-length small enough compared to the range of the Kac-interaction. We show that these measures are Gibbs measures for the same renormalized interaction potential. This potential depends locally on the field configuration η and decays exponentially, uniformly in η, for which we give explicit bounds.
Thermal conductivity across the metal-insulator transition in single crystalline hyperkagome Na$_{3+x}$Ir$_3$O$_8$
Creators: name: Fauqué, B.
name: Xu, Xiaofeng
name: Bangura, A. F.
name: Hunter, E. C.
name: Yamamoto, A.
name: Behnia, K.
name: Carrington, A.
name: Takagi, H.
name: Hussey, N. E.
name: Perry, R. S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The hyperkagome antiferromagnet Na$_{4}$Ir$_3$O$_8$ represents the first genuine candidate for the realisation of a three-dimensional quantum spin-liquid. It can also be doped towards a metallic state, thus offering a rare opportunity to explore the nature of the metal-insulator transition in correlated, frustrated magnets. Here we report thermodynamic and transport measurements in both metallic and weakly insulating single crystals down to 150 mK. While in the metallic sample the phonon thermal conductivity ($κ^{ph}$) is almost in the boundary scattering regime, in the insulating sample we find a large reduction $κ^{ph}$ over a very wide temperature range. This result can be ascribed to the scattering of phonons off nanoscale disorder or off the gapless magnetic excitations that are seen in the low-temperature specific heat. This works highlights the peculiarity of the metal-insulator transition in Na$_{3+x}$Ir$_3$O$_8$ and demonstrates the importance of the coupling between lattice and spin degrees of freedom in the presence of strong spin-orbit coupling.
description: 6 pages, 4 figures
Blood Pressure and White-Matter Disease Progression in a Biethnic Cohort: Atherosclerosis Risk in Communities (ARIC) Study
Creators: name: Coresh, J.
name: Jack, C. R.
name: Knopman, D. S.
name: Mosley, T. H.
name: Rose, K. M.
name: Sharrett, A. R.
name: Catellier, D. J.
name: Coker, L. H.
name: Shibata, D. K.
name: Gottesman, R. F.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2010

description: Blood pressure (BP) is a predictor of concurrent and subsequently measured white matter hyperintensity (WMH), but longitudinal studies of WMH change and data in black participants are lacking. We hypothesized that WMH progression would be 1) strongly related to BP in blacks and whites, and 2) predicted more strongly by earlier (midlife) or cumulative BP measurements than by measures at older ages.
${\cal R}^2$ inflation from scale invariant supergravity and anomaly free superstrings with fluxes
Creators: name: Kounnas, Costas
name: Lüst, Dieter
name: Toumbas, Nicolaos
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The ${\cal R}^2$ scale invariant gravity theory coupled to conformally invariant matter is investigated. We show that in the non-supersymmetric case the conformally coupled scalars belong to an $SO(1, 1+n)/SO(1+n)$ manifold, while in the supersymmetric case the scalar manifold becomes isomorphic to the Kählerian space ${\cal M}_n$=$SU(1, 1+n)/ U(1)\times SU(1+n)$. In both cases when the underlying scale symmetry is preserved the vacuum corresponds to de Sitter space. Once the scale symmetry is broken by quantum effects, a transition to flat space becomes possible. We argue that the scale violating terms are induced by anomalies related to a $U(1)_R$ symmetry. The anomaly is resolved via the gauging of a Peccei-Quinn axion shift symmetry. The theory describes an inflationary transition from de Sitter to flat Minkowski space, very similar to the Starobinsky inflationary model. The extension to metastable de Sitter superstring vacua is also investigated. The scalar manifold is extended to a much richer manifold, but it contains always ${\cal M}_n$ as a sub-manifold. In superstrings the metastability is induced by axions that cure the anomalies in chiral $N=1$ (or even $N=0$) supersymmetric vacua via a Green-Schwarz/Peccei-Quinn mechanism generalized to four dimensions. We present some typical superstring models and discuss the possible stabilization of the no-scale modulus.
description: 52 pages, revised version with typos corrected and new refs. added
Genome-Wide Association Studies of MRI-Defined Brain Infarcts: Meta-Analysis From the CHARGE Consortium * Supplemental Appendix
Creators: name: Aulchenko, Y. S.
name: Beiser, A.
name: Rotter, J. I.
name: Eiriksdottir, G.
name: Fornage, M.
name: Enzinger, C.
name: Harris, T. B.
name: Lumley, T.
name: Bis, J. C.
name: Shibata, D. K.
name: Fazekas, F.
name: Catellier, D. J.
name: Tscherner, M.
name: DeStefano, A. L.
name: van der Lugt, A.
name: Aspelund, T.
name: Rivadeneira, F.
name: Schmidt, H.
name: Smith, A. V.
name: Atwood, L. D.
name: Rice, K.
name: Psaty, B. M.
name: Tzourio, C.
name: Debette, S.
name: Knopman, D. S.
name: Heiss, G.
name: Dufouil, C.
name: DeCarli, C.
name: Struchalin, M.
name: Sigurdsson, S.
name: Ikram, M. A.
name: Koudstaal, P. J.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2010

description: Previous studies examining genetic associations with MRI-defined brain infarct have yielded inconsistent findings. We investigated genetic variation underlying covert MRI-infarct, in persons without histories of transient ischemic attack or stroke. We performed meta-analysis of genome-wide association studies of white participants in 6 studies comprising the Cohorts for Heart and Aging Research in Genomic Epidemiology (CHARGE) consortium.
Intracerebral Hemorrhage and Head Trauma: Common Effects and Common Mechanisms of Injury
Creators: name: Powers, W. J.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2010

description: Non-traumatic intracerebral hemorrhage (ICH) remains a devastating condition with 30-day mortality rates of 35–52%. Until the pathophysiology of this condition is better understood, it will not be possible to develop effective therapies. Studies of cerebral blood flow and metabolism in patients with acute ICH show similar abnormalities to those that occur in patients with traumatic brain injury (TBI), thus raising the question whether there are common mechanisms of injury shared by the two conditions. In both ICH and TBI, there is an early reduction in the cerebral metabolic rate of oxygen without ischemia, mitochondrial dysfunction and transient focal increases in regional glucose metabolism that occur after a few days. ICH and TBI share barotrauma from pressure waves that propagate through the intracranial contents as a common mechanism of brain injury. Recent data demonstrating contralateral hemispheric damage in patients with acute ICH provides further support for this theory of common injury mechanisms.
Formula Method for Bound State Problems
Creators: name: Falaye, Babatunde J.
name: Ikhdair, Sameer M.
name: Hamzavi, Majid
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a simple formula for finding bound state solution of any quantum wave equation which can be simplified to the form of $Ψ"(s)+\frac{(k_1-k_2s)}{s(1-k_3s)}Ψ'(s)+\frac{(As^2+Bs+C)}{s^2(1-k_3s)^2}Ψ(s)=0$. The two cases where $k_3=0$ and $k_3\neq 0$ are studied. We derive an expression for the energy spectrum and the wave function in terms of generalized hypergeometric functions $_2F_1(α, β; γ; k_3s)$. In order to show the accuracy of this proposed formula, we resort to obtaining bound state solutions for some existing eigenvalue problems in a rather more simplified way. This method has been shown to be accurate, efficient, reliable and very easy to use particularly when applied to vast number of quantum potential models.
Premature Ventricular Complexes and the Risk of Incident Stroke: The Atherosclerosis Risk In Communities (ARIC) Study
Creators: name: Massing, M. W.
name: Heiss, G.
name: Agarwal, S. K.
name: Rautaharju, P. M.
name: Shahar, E.
name: Simpson, R. J.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2010

description: Ventricular premature complexes (PVCs) on a 2-minute electrocardiogram (ECG) are a common, largely asymptomatic finding, associated with increased risk of coronary heart disease (CHD) and death. They may reflect atherosclerosis or other pathogenic pathways that predispose to arrhythmias and stroke.
Model identification using the Efficient Determination Criterion
Creators: name: Resende, Paulo Angelo Alves
name: Dorea, Chang Chung Yu
Publisher: name: arXiv
Year: 2014
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 62M05, 62F12, 60J10

description: In the realm of the model selection context, Akaike's and Schwarz's information criteria, AIC and BIC, have been applied successfully for decades for model order identification. The Efficient Determination Criterion (EDC) is a generalization of these criteria, proposed originally to define a strongly consistent class of estimators for the dependency order of a multiple Markov chain. In this work, the EDC is generalized to partially nested models, which encompass many other order identification problems. Based on some assumptions, a class of strongly consistent estimators is established in this general environment. This framework is applied to BEKK multivariate GARCH models and, in particular, the strong consistency of the order estimator based on BIC is established for these models.
description: 27 pages
Analytical Solutions of Landau (1+1)-Dimensional Hydrodynamics
Creators: name: Wong, Cheuk-Yin
name: Sen, Abhisek
name: Gerhard, Jochen
name: Torrieri, Giorgio
name: Read, Kenneth
Publisher: name: arXiv
Year: 2014
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: To help guide our intuition, summarize important features, and point out essential elements, we review the analytical solutions of Landau (1+1)-dimensional hydrodynamics and exhibit the full evolution of the dynamics from the very beginning to subsequent times. Special emphasis is placed on the matching and the interplay between the Khalatnikov solution and the Riemann simple wave solution at the earliest times and in the edge regions at later times. These analytical solutions collected and developed here serve well as a useful guide and cross-check in the development of complicated numerically-intensive relativistic hydrodynamical Monte Carlo simulations.
description: 11 pages, 8 figures
Race- and Sex-Specific Associations of Obesity Measures With Ischemic Stroke Incidence in the Atherosclerosis Risk in Communities (ARIC) Study
Creators: name: Brancati, Frederick L.
name: Yamagishi, Kazumasa
name: Folsom, Aaron R.
name: Stevens, June
name: Yatsuya, Hiroshi
name: North, Kari E.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2010

description: Some studies have suggested that the association between obesity and ischemic stroke differs for blacks versus whites. We explored race- and sex-specific incidence rates and hazard ratios (HRs) of ischemic stroke in relation to multiple obesity measures.
Solar Powered Grass Cutting Robot
Creators: name: Ms.Kalavakuri Sri Kedara Varshini, Mr.G.Devanand, Ms.Penumacha Jahnavi, Mr.Jammisetti Venkata Sasidhar, Ms.Ramanujam Sai Divya, Mr.Dhussa Sudheer Kumar, Mr.Kanaparthi Anil Kumar, Dr.N V Prasad.K
Publisher: name: Zenodo
Year: 2025

description: The Bluetooth Controlled Solar Grass Cutter is a smart and eco-friendly robotic system designed forautomated grass cutting. The system integrates an Arduino-based controller, DC motors, an L298 motordriver, and a cutting motor, all controlled via a mobile application through Bluetooth communication. Therobot operates on solar power, ensuring sustainability while reducing dependency on manual labor forgrass cutting.
title: Исследование природных вод на содержание ионов, придающих жесткость
Creators: name: Бровцина, Александра
name: Денисова, Нелли
name: Иванова, Елизавета
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2022

description: Водопроводная вода, которую люди используют для питья и бытовых нужд, содержит в себе множество минеральных солей. В умеренных количествах они полезны для человека, но при повышенной концентрации могут наносить серьезный ущерб организму. Целью эксперимента было определение содержания ионов кальция и магния в пробах (именно совокупность этих ионов и придает воде жесткость) и выбор наиболее
оптимального способа ее устранения. Определение исследуемых параметров и последующие расчеты проводились по соответствующим методикам. По результатам проведенных исследований были сделаны выводы о химическом составе отобранных проб и выбран наиболее оптимальный способ устранения жесткости воды проверяемых объектов. Результатом проделанной работы является доказательство возможности
уменьшить исходную жесткость образца всеми способами.
Retinal Microvascular Signs and 10-Year Risk of Cerebral Atrophy: The Atherosclerosis Risk in Communities (ARIC) Study
Creators: name: Catellier, D.
name: Shibata, D. K.
name: Coker, L. H.
name: Klein, R.
name: Wong, T. Y.
name: Mosley, T.
name: Sharrett, A. R.
name: Kawasaki, R.
name: Islam, A. F. M.
name: Knopman, D. S.
name: Cheung, N.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2010

description: Cerebral atrophy, detected as ventricular enlargement (VE) or sulcal widening (SW) on magnetic resonance imaging (MRI), is recognized as a risk factor for vascular dementia or Alzheimer’s disease. However, its underlying pathophysiology is not known. We examined whether retinal microvascular assessment could provide predictive information on the risk of VE and SW on MRI.
Carotid Artery Wall Thickness and Risk of Stroke Subtypes: The Atherosclerosis Risk in Communities Study
Creators: name: Ohira, T.
name: Shahar, E.
name: Folsom, A. R.
name: Chambless, L. E.
name: Rosamond, W. D.
name: Iso, H.
name: Sharrett, A. R.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2011

description: Understanding associations of carotid atherosclerosis with stroke subtypes may contribute to more effective prevention of stroke.
Early Changes of Tissue Perfusion After Tissue Plasminogen Activator in Hyperacute Ischemic Stroke
Creators: name: Eldeniz, C.
name: Zhu, H.
name: Ponisio, R.
name: Vo, K.
name: Powers, W. J.
name: Ford, A. L.
name: Lin, W.
name: Li, Y.
name: Chen, Y.
name: Lee, J.-M.
name: An, H.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2011

description: It is hypothesized that tPA rescues brain tissue by improving perfusion. In this study, we aimed to examine acute regional perfusion changes and how they influence infarction and clinical outcome.
Preexisting Statin Use Is Associated With Greater Reperfusion in Hyperacute Ischemic Stroke
Creators: name: Vo, K. D.
name: Powers, W. J.
name: An, H.
name: Bushard, P.
name: D'Angelo, G.
name: Lee, J.-M.
name: Lin, W.
name: Ponisio, R.
name: Ford, A. L.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2011

description: Statin pretreatment has been associated with improved outcomes in patients with ischemic stroke. Although several mechanisms have been examined in animal models, few have been examined in patients. We hypothesized that patients using statins before stroke onset may have greater reperfusion than patients not using statins.
Prehospital Notification by Emergency Medical Services Reduces Delays in Stroke Evaluation: Findings From the North Carolina Stroke Care Collaborative
Creators: name: Patel, M. D.
name: Rosamond, W. D.
name: O'Brien, E. C.
name: Rose, K. M.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2011

description: Individuals with stroke-like symptoms are recommended to receive rapid diagnostic evaluation. Emergency medical services (EMS) transport, compared to private modes, and hospital notification prior to arrival may reduce delays in evaluation. This study estimated associations between hospital arrival modes (EMS or private; with or without EMS pre-notification) and times for completion and interpretation of initial brain imaging in presumed stroke patients.
Simple Stellar Population Modeling of Low S/N Galaxy Spectra and Quasar Host Galaxy Applications
Creators: name: Mosby, Gregory
name: Tremonti, Christy
name: Hooper, Eric
name: Wolf, Marsha
name: Sheinis, Andrew
name: Richards, Joseph
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: To study the effect of supermassive black holes (SMBHs) on their host galaxies it is important to study the hosts when the SMBH is near its peak activity. A method to investigate the host galaxies of high luminosity quasars is to obtain optical spectra at positions offset from the nucleus where the relative contribution of the quasar and host are comparable. However, at these extended radii the galaxy surface brightness is often low (20-22 mag per arcsec$^{2}$) and the resulting spectrum might have such low S/N that it hinders analysis with standard stellar population modeling techniques. To address this problem we have developed a method that can recover galaxy star formation histories (SFHs) from rest frame optical spectra with S/N $\sim$ 5~Å$^{-1}$. This method uses the statistical technique diffusion k-means to tailor the stellar population modeling basis set. Our diffusion k-means minimal basis set, composed of 4 broad age bins, is successful in recovering a range of galaxy SFHs. Additionally, using an analytic prescription for seeing conditions, we are able to simultaneously model scattered quasar light and the SFH of quasar host galaxies (QHGs). We use synthetic data to compare results of our novel method with previous techniques. We also present the modeling results on a previously published QHG and show that galaxy properties recovered from a diffusion k-means basis set are less sensitive to noise added to this quasar host galaxy spectrum. Our new method has a clear advantage in recovering information from QHGs and could also be applied to the analysis of other low S/N galaxy spectra such as those typically obtained for high redshift objects or integral field spectroscopic surveys.
description: 26 pages, 14 figures, accepted to MNRAS 2014 November 28
Signal Evolution and Infarction Risk for Apparent Diffusion Coefficient Lesions in Acute Ischemic Stroke Are Both Time- and Perfusion-Dependent
Creators: name: Vo, K.
name: Ford, A. L.
name: An, H.
name: Powers, W. J.
name: Lee, J.-M.
name: Lin, W.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2011

description: This study aimed to examine the temporal relationship between tissue perfusion and apparent diffusion coefficient (ADC) changes within 6 hours of ischemic stroke onset and how different reperfusion patterns may affect tissue outcome in ADC lesion.