cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Phase Center Corrections for new GNSS-Signals
Creators: name: Kröger, Johannes
name: Breva, Yannick
name: Kersten, Tobias
name: Schön, Steffen
Publisher: name: Leibniz Universität Hannover
Year: 2019
Subjects: subject: GPS/GNSS antennas
subject: GNSS
subject: Geodesy
subject: GNSS receiver antenna calibration
subject: GPS/GNSS-Antennen
subject: Geodäsie
subject: GPS/GNSS-Antennenkalibrierung
subject: Dewey Decimal Classification::500 | Naturwissenschaften::520 | Astronomie, Kartographie
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau::621 | Angewandte Physik::621,3 | Elektrotechnik, Elektronik
subject: Dewey Decimal Classification::500 | Naturwissenschaften::550 | Geowissenschaften

description: Phase center corrections (including corrections for phase center offset and phase center variations) are nowadays mandatory for high accuracy GNSS applications. Currently, only L1- and L2 frequencies for GPS and GLONASS are provided and published in the Antenna Exchange Format (ANTEX) maintained by the antenna working group of the International GNSS Service IGS. Field calibrations values for new signals like Galileo or GPS L5 are still missing. The Institut für Erdmessung (IfE) is one of the IGS accepted absolute antenna field calibration institutions and provides PCC using the so-called Hannover-Concept, i.e. using a robot to precisely rotate and tilt the antenna under test. This concept has been extended into an experimental approach where PCC of new signals are estimated in post-processing using spherical harmonics. In this contribution, we describe the extended concept and show first patterns for the GPS L5 as well as the Galileo E1 and E5 signals. After a short introduction into the method of absolute antenna field calibration, the roboter model as well as the adjustment concept will be presented.We will show that an estimation of PCC is feasible with the method developed at the IfE. The patterns will be presented and discussed for antennas typical to IGS stations.
An Algorithm for Precise Aperture Photometry of Critically Sampled Images
Creators: name: Bickerton, Steven
name: Lupton, Robert
Publisher: name: arXiv
Year: 2013
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We present an algorithm for performing precise aperture photometry on critically sampled astrophysical images. The method is intended to overcome the small-aperture limitations imposed by point-sampling. Aperture fluxes are numerically integrated over the desired aperture, with sinc-interpolation used to reconstruct values between pixel centers. Direct integration over the aperture is computationally intensive, but the integrals in question are shown to be convolution integrals and can be computed ~10000x faster as products in the wave-number domain. The method works equally well for annular and elliptical apertures and could be adapted for any geometry. A sample of code is provided to demonstrate the method.
description: Accepted MNRAS
A turnstile mechanism for fronts propagating in fluid flows
Creators: name: Mahoney, John R.
name: Mitchell, Kevin A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We consider the propagation of fronts in a periodically driven flowing medium. It is shown that the progress of fronts in these systems may be mediated by a turnstile mechanism akin to that found in chaotic advection. We first define the modified ("active") turnstile lobes according to the evolution of point sources across a transport boundary. We then show that the lobe boundaries may be constructed from stable and unstable \emph{burning invariant manifolds}---one-way barriers to front propagation analogous to traditional invariant manifolds for passive advection. Because the burning invariant manifolds (BIMs) are one-dimensional curves in a three-dimensional ($xyθ$) phase space, their projection into $xy$-space exhibits several key differences from their advective counterparts: (lobe) areas are not preserved, BIMs may self-intersect, and an intersection between stable and unstable BIMs does not map to another such intersection. These differences must be accommodated in the correct construction of the new turnstile. As an application, we consider a lobe-based treatment protocol for protecting an ocean bay from an invading algae bloom.
description: 16 pages, 24 figures
Hidden Hydroxides in KOH-Grown BaNiO3 Crystals: A Potential Link to Their Catalytic Behavior
Creators: name: Jin, Lun
name: Wang, Haozhe
name: Xu, Xianghan
name: Ni, Danrui
name: Yang, Chen
name: Ku, Yu-Chieh
name: Liu, Cheng-En
name: Kuo, Chang-Yang
name: Chang, Chun-Fu
name: Sereika, Raimundas
name: Bi, Wenli
name: Xie, Weiwei
name: Cava, Robert. J.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The hexagonal perovskite BaNiO3, prepared via non-ceramic approaches, is known to act as a good catalyst for the oxygen-evolution reaction (OER) in alkaline media. Here we report our observation that BaNiO3 synthesized via KOH flux growth and high O2 pressure ceramic synthesis have different magnetic properties. We show that this is because the KOH flux-grown crystals made in open-air are actually a hydroxide-containing form of BaNiO3 that can be dried upon annealing in O2 flow. This work not only unveils a previously unknown aspect of the BaNiO3 OER catalyst and offers some insights into the underlying mechanism, but also suggests that hydroxide ions may be present in other hexagonal perovskite oxides prepared in wet conditions.
description: 20 pages, 5 figures
Predicting Low Flow Conditions from Climatic Indices - Indicator-Based Modeling for Climate Change Impact Assessment
Creators: name: Fangmann, Anne
name: Haberlandt, Uwe
Publisher: name: München : European Geosciences Union
Year: 2014
Subjects: subject: Dewey Decimal Classification::500 | Naturwissenschaften::550 | Geowissenschaften

description: In the face of climate change, the assessment of future hydrological regimes has become indispensable in the field of water resources management. Investigation of potential change is vital for proper planning, especially with regard to hydrological extremes. Commonly, projection of future streamflow is done applying process-based hydrological models, using climate model data as input, whose complex model structures generally require excessive amounts of time and effort for set-up and computation. This study aims at identifying practical alternatives to the employment of sophisticated models by considering simpler, yet sufficiently accurate methods for modeling rainfall-runoff relations with regard to hydrological extremes. The focus is thereby put on the prediction of low flow periods, which are, in contrast to flood events, characterized by extended durations and spatial dimensions. The models to be established in this study base on indicators, which characterize both meteorological and hydrological conditions within dry periods. This approach makes direct use of the coupling between atmospheric driving forces and streamflow response with the underlying presumption that low-precipitation and high-evaporation periods result in diminished flow, implying that relationships exist between the properties of both meteorological and hydrological events (duration, volume, severity etc.). Eventually, optimal combinations of meteorological indicators are sought that are suitable to predict various low flow characteristics with satisfactory accuracy. Two approaches for model specification are tested: a) multiple linear regression, and b) Fuzzy logic. The data used for this study are daily time series of mean discharge obtained from 294 gauges with variable record length situated in the federal state of Lower Saxony, Germany, as well as interpolated climate variables available for a period from 1951 to 2011. After extraction of a variety of indicators from the available discharge and climate time series on a bi-annual basis, regression and Fuzzy models are fit. Fitting is done in two variations: locally at each of the watersheds in the study area, and regionally, yielding one specific model expression for the entire study area. Models for the individual stations perform well using only the meteorological indicators as predictor variables, while the regional models require the additional input of catchment descriptors to account for the variability of the rainfall-runoff translation processes between the catchments.
Additional file 1 of Effect of an intraoperative periradicular application of platelet-rich fibrin (PRF) on residual post-surgical neuropathic pain after disc herniation surgery: study protocol for NeuroPRF, a randomized controlled trial
Creators: name: Todeschi, Julien
name: Dannhoff, Guillaume
name: Coca, Andres Hugo
name: Timbolschi, Daniel Ionut
name: Proust, François
name: Lefebvre, François
name: Lelievre, Vincent
name: Poisbeau, Pierrick
name: Vallat, Laurent
name: Salvat, Eric
name: Bohren, Yohann
Publisher: name: figshare
Year: 2023
Subjects: subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: Developmental Biology
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 110309 Infectious Diseases

description: Additional file 1. The right of access to source data and documents.
Coordinated X-ray and UV absorption within the accretion disk wind of the active galactic nucleus PG 1126-041
Creators: name: Giustini, M.
name: Hidalgo, P. Rodríguez
name: Reeves, J. N.
name: Matzeu, G.
name: Braito, V.
name: Eracleous, M.
name: Chartas, G.
name: Schartel, N.
name: Vignali, C.
name: Hall, P. B.
name: Waters, T.
name: Ponti, G.
name: Proga, D.
name: Dadina, M.
name: Cappi, M.
name: Miniutti, G.
name: de Vries, L.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Accretion disk winds launched close to supermassive black holes (SMBHs) are a viable mechanism to provide feedback between the SMBH and the host galaxy. We aim to characterize the X-ray properties of the inner accretion disk wind of the nearby active galactic nucleus (AGN) PG 1126-041, and to study its connection with the ultraviolet (UV)-absorbing wind. We perform spectroscopic analysis of eight XMM-Newton observations of PG 1126-041 taken between 2004 and 2015, using both phenomenological models and the most advanced accretion disk wind models available. For half of the dataset, we can compare the X-ray analysis results with the results of quasi-simultaneous, high-resolution spectroscopic UV observations taken with the Cosmic Origins Spectrograph (COS) on board the Hubble Space Telescope. The X-ray spectra of PG 1126-041 are complex and absorbed by ionized material which is highly variable on multiple time scales, sometimes as short as 11 days. Accretion disk wind models can account for most of the X-ray spectral complexity of PG 1126-041, with the addition of massive clumps, represented by a partially covering absorber. Variations in column density ($N_H \sim 5-20 \times 10^{22}$ cm$^{-2}$) of the partially covering absorber drive the observed X-ray spectral variability of PG 1126-041. The absorption from the X-ray partially covering gas and from the blueshifted C IV troughs appear to vary in a coordinated way. The line of sight toward PG 1126-041 offers a privileged view through a highly dynamic nuclear wind originating on inner accretion disk scales, making the source a very promising candidate for future detailed studies of the physics of accretion disk winds around SMBHs.
description: 24 pages, 13 figures, accepted for publication in Astronomy & Astrophysics
Optimizing Selective Laser Melting for Reflective Optics
Creators: name: Leuteritz, Georg
name: Lippert, René Bastian
name: Lachmayer, Roland
Publisher: name: Erlangen : Deutsche Gesellschaft für angewandte Optik
Year: 2017
Subjects: subject: Additive Manufacturing
subject: reflective optics
subject: Selective Laser Melting
subject: Oberflächen
subject: Optische Komponenten
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: This work examines an approach for the optimization of the optical quality of additively manufactured reflectors. Therefore the parameters of a Selective Laser Melting process, which manipulate surface properties are distinguished and varied in order to achieve optimized reflectance and roughness values. Influences are evaluated with specific samples and optical measurement equipment.
Study on efficiency of event start time determination at BESIII
Creators: name: Guan, Yinghui
name: Lu, Xiao-Rui
name: Zheng, Yangheng
name: Wang, Yi-Fang
Publisher: name: arXiv
Year: 2013
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A method to estimate efficiency of event start time determination at BESIII is developed. This method estimates the efficiency at the event level by combining the efficiencies of various tracks ($e$, $μ$, $π$, K, $p$, $γ$) in a Bayesian way. Efficiencies results and difference between data and MC at the track level are presented in this paper. For a given physics channel, event start time efficiency and systematic error can be estimated following this method.
description: 5 pages, 4 figures. Submitted to and accepted by Chinese Physics C
Porous metal bonds increase the resource efficiency for profile grinding
Creators: name: Denkena, Berend
name: Grove, Thilo
name: Suntharakumaran, Vino
Publisher: name: Amsterdam : Elsevier
Year: 2018
Subjects: subject: Resource Efficiency
subject: Profile Grinding
subject: Brittle Materials
subject: Metal Bond
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: Profile grinding is irreplaceable for the machining of various brittle and hard workpieces, e.g. cutting tools for milling and drilling, seal components made of ceramics and bearing components. Grinding is rather inefficient regarding the energy demand for the machining of one volume element of material compared to other manufacturing processes. However, the process forces can be reduced without influencing the tool wear by using grinding wheels with a porous metal bond and grains that tend to splinter. This allows higher material removal rates without increasing the process forces, ultimately reducing the energy consumption per workpiece manufactured. Additionally thermal and mechanical loads on the workpiece are reduced leading to increased life cycles of grinded products. The application of these grinding wheels is currently on hold for profile grinding since the dressing process is not in control. Therefore, this paper investigates the dressing operation for grinding wheels with a porous metal bond in order to reduce the energy consumption in profile grinding of brittle and hard materials.
Evidence against a strong first-order phase transition in neutron star cores: impact of new data
Creators: name: Brandes, Len
name: Weise, Wolfram
name: Kaiser, Norbert
Publisher: name: arXiv
Year: 2023
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: With the aim of exploring the evidence for or against phase transitions in cold and dense baryonic matter, the inference of the sound speed and equation-of-state for dense matter in neutron stars is extended in view of recent new observational data. The impact of the heavy (2.35 $M_\odot$) black widow pulsar PSR J0952-0607 and of the unusually light supernova remnant HESS J1731-347 is inspected. In addition a detailed re-analysis is performed of the low-density constraint based on chiral effective field theory and of the perturbative QCD constraint at asymptotically high densities, in order to clarify the influence of these constraints on the inference procedure. The trace anomaly measure, $Δ= 1/3 - P/\varepsilon$, is also computed and discussed. A systematic Bayes factor assessment quantifies the evidence (or non-evidence) of low averaged sound speeds $(c_s^2 \leq 0.1)$, a prerequisite for a phase transition, within the range of densities realized in the core of neutron stars. One of the consequences of including PSR J0952-0607 in the data base is a further stiffening of the equation-of-state, resulting for a 2.1 solar-mass neutron star in a reduced central density of less than five times the equilibrium density of normal nuclear matter at the 68\% level. The evidence against small sound speeds in neutron star cores is further strengthened. Within the inferred 68\% posterior credible bands, only a weak first-order phase transition with a coexistence density interval $Δn/n \lesssim 0.2$ would be compatible with the observed data.
The LSND and MiniBooNE Oscillation Searches at High $Δm^2$
Creators: name: Conrad, Janet M.
name: Louis, William C.
name: Shaevitz, Michael H.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: This paper reviews the results of the LSND and MiniBooNE experiments. The primary goal of each experiment was to effect sensitive searches for neutrino oscillations in the mass region with $Δm^2 \sim 1$ eV$^2$. The two experiments are complementary, and so the comparison of results can bring additional information with respect to models with sterile neutrinos. Both experiments obtained evidence for $\bar ν_μ\rightarrow \bar ν_e$ oscillations, and MiniBooNE also observed a $ν_μ\rightarrow ν_e$ excess. In this paper, we review the design, analysis, and results from these experiments. We then consider the results within the global context of sterile neutrino oscillation models. The final data sets require a more extended model than the simple single sterile neutrino model imagined at the time that LSND drew to a close and MiniBooNE began. We show that there are apparent incompatibilities between data sets in models with two sterile neutrinos. However, these incompatibilities may be explained with variations within the systematic error. Overall, models with two (or three) sterile neutrinos seem to succeed in fitting the global data, and they make interesting predictions for future experiments.
description: Posted with permission from the Annual Review of Nuclear and Particle Science, Volume 63. \c{opyright} 2013 by Annual Reviews, http://www.annualreviews.org
Topological games and Alster spaces
Creators: name: Aurichi, Leandro F.
name: Dias, Rodrigo R.
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Topology (math.GN)
subject: FOS: Mathematics
subject: 54D20, 54G99, 54A10

description: In this paper we study connections between topological games such as Rothberger, Menger and compact-open, and relate these games to properties involving covers by G_δ subsets. The results include: (1) If Two has a winning strategy in the Menger game on a regular space X, then X is an Alster space. (2) If Two has a winning strategy in the Rothberger game on a topological space X, then the G_δ-topology on X is Lindelof. (3) The Menger game and the compact-open game are (consistently) not dual.
description: 13 pages; submitted
Cyclic and Long-term Variation of Sunspot Magnetic Fields
Creators: name: Pevtsov, Alexei A.
name: Bertello, Luca
name: Tlatov, Andrey G.
name: Kilcik, Ali
name: Nagovitsyn, Yury A.
name: Cliver, Edward W.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Measurements from the Mount Wilson Observatory (MWO) are used to study the long-term variations of sunspot field strengths from 1920 to 1958. Following a modified approach similar to that in Pevtsov et al. (2011), for each observing week we select a single sunspot with the strongest field strength measured that week and then compute monthly averages of these weekly maximum field strengths. The data show the solar cycle variation of the peak field strengths with an amplitude of about 500-700 gauss (G), but no statistically significant long-term trends. Next, we use the sunspot observations from the Royal Greenwich Observatory (RGO) to establish a relationship between the sunspot areas and the sunspot field strengths for Cycles 15-19. This relationship is then used to create a proxy of peak magnetic field strength based on sunspot areas from the RGO and the USAF/NOAA network for the period from 1874 to early 2012. Over this interval, the magnetic field proxy shows a clear solar cycle variation with an amplitude of 500-700 G and a weaker long-term trend. From 1874 to around 1920, the mean value of magnetic field proxy increases by about 300-350 G, and, following a broad maximum in 1920-1960, it decreases by about 300 G. Using the proxy for the magnetic field strength as the reference, we scale the MWO field measurements to the measurements of the magnetic fields in Pevtsov et al. (2011) to construct a combined data set of maximum sunspot field strengths extending from 1920 to early 2012. This combined data set shows strong solar cycle variations and no significant long-term trend (linear fit to the data yields a slope of $-0.2\pm$0.8 G year$^{-1}$). On the other hand, the peak sunspot field strengths observed at the minimum of the solar cycle show a gradual decline over the last three minima (corresponding to cycles 21-23) with a mean downward trend of $\approx$ 15 G year$^{-1}$.
Quantum information processing with Clifford quantum cellular automata
Creators: name: Gütschow, Johannes
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2012
Subjects: subject: Quantum information
subject: cellular automata
subject: Clifford operations
subject: Quanteninformation
subject: Zellularautomaten
subject: Clifford Operationen
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: [no abstract]
Recent intraplate earthquakes in Northwest Germany : glacial isostatic adjustment and/or a consequence of hydrocarbon production?
Creators: name: Uta, Philipp
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2017
Subjects: subject: Earthquakes
subject: NW Germany
subject: induced seismicity
subject: Erdbeben
subject: NW Deutschland
subject: induzierte Seismizität
subject: Dewey Decimal Classification::500 | Naturwissenschaften::550 | Geowissenschaften

description: [no abstract]
Development of Low Cost Private Office Access Control System (OACS)
Creators: name: Khan, Sadeque Reza
Publisher: name: arXiv
Year: 2012
Subjects: subject: Other Computer Science (cs.OH)
subject: FOS: Computer and information sciences

description: Over the years, access control systems have become more and more sophisticated and several security measures have been employed to combat the menace of insecurity of lives and property. This is done by preventing unauthorized entrance into buildings through entrance doors using conventional and electronic locks, discrete access code, and biometric methods such as the finger prints, thumb prints, the iris and facial recognition. We have designed a flexible and low cost modular system based on integration of keypad, magnetic lock and a controller. PIC 16F876A which is an 8-bit Microcontroller, is used here as a main controller. An advanced simulation based compiler Flowcode V4 is used to develop the software part in this project.
description: ISSN: 1839-5171
Anatomy of the band structure of the newest apparent near-ambient superconductor LuH$_{3-x}$N$_x$
Creators: name: Pavlov, Nikita S.
name: Shein, Igor R.
name: Pervakov, Kirill S.
name: Pudalov, Vladimir M.
name: Nekrasov, Igor A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Recently it was claimed that nitrogen-doped lutetium hydride exhibited a near-ambient superconducting transition with a temperature of 294 K at a pressure of only 10 kbar, this pressure being several orders of magnitude lower than previously demonstrated for hydrides under pressure. In this paper, we investigate within DFT+U the electronic structure of both parent lutetium hydride LuH$_3$ and nitrogen doped lutetium hydride LuH$_{2.75}$N$_{0.25}$. We calculated corresponding bands, density of states and Fermi surfaces. It is shown that in the stoichiometric system the Lu-5d states cross the Fermi level while the H-1s states make almost no contribution at the Fermi level. However, with nitrogen doping, the N-2p states enter the Fermi level in large quantities and bring together a significant contribution from the H-1s states. The presence of N-2p and H-1s states at the Fermi level in a doped compound can facilitate the emergence of superconductivity. For instance, nitrogen doping almost doubles the value of DOS at the Fermi level. Simple BCS analysis shows that the nitrogen doping of LuH$_3$ can provide T$_c$ more than 100K and even increase it with further hole doping.
description: 7 pages, 5 figures
Charge Carrier Transport in Disordered Polymers
Creators: name: Novikov, S. V.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: General properties of charge carrier transport in disordered organic materials are discussed. Spatial correlation between energies of transport sites determines the form of the drift mobility field dependence. Particular kind of spatial correlation in a disordered material depends on its nature. Mobility field dependences have to be different in polar and nonpolar materials. Different methods of mobility calculation from the shape of photocurrent transient are analyzed. A widely used method is very sensitive to the variation of the shape of the transient and sometimes produces results that effectively masquerade the true dependence of the mobility on electric field or trap concentration. Arguments in favor of the better, more reliable method are suggested. Charge transport in materials containing charged traps is considered without using the isolated trap approximation and this leads to qualitatively different results. They indicate that the effect of charged traps can hardly be responsible for experimentally observed transport properties of disordered organic materials.
description: 17 pages, 7 figures
Quantum-optical control techniques for atomic motional states
Creators: name: Schmidt, Sönke
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2012
Subjects: subject: Laser-based control techniques
subject: atomic motional states
subject: shortcuts to adiabaticity
subject: Laserbasierte Kontrollverfahren
subject: atomare Bewegungszustände
subject: Abkürzungen zur Adiabatizität
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: [no abstract]
Additional file 1 of Lipid kinase PIP5Kα contributes to Hippo pathway activation via interaction with Merlin and by mediating plasma membrane targeting of LATS1
Creators: name: Le, Truc Phan Hoang
name: Nguyen, Nga Thi Thanh
name: Le, Duong Duy Thai
name: Anwar, Muhammad Ayaz
name: Lee, Sang Yoon
Publisher: name: figshare
Year: 2023
Subjects: subject: Biophysics
subject: Biochemistry
subject: Cell Biology
subject: Molecular Biology
subject: Science Policy
subject: Immunology
subject: FOS: Clinical medicine
subject: Developmental Biology
subject: 60506 Virology
subject: FOS: Biological sciences

description: Additional file 1: Fig. S1. Effects of PIP5Kα KO or overexpression on the Hippo-YAP/TAZ pathway. Fig. S2. PIP5Kα enhances the degradative ubiquitination of TAZ. Fig. S3. Reduction in PIP2 levels in PIP5Kα-deficient and PIP5Kα KD-transfected cells. Fig. S4. PIP5Kα acts as an inhibitor of YAP/TAZ in a PIP2-dependent manner. Fig. S5. Effects of PIP5Kα KO or KD mutant on PIP5Kβ and PIP5Kγ expression levels. Fig. S6. Effects of the type I PIP5Ks overexpression on Hippo-YAP/TAZ pathway. Fig. S7. Effects of PIP5Kα KO on phosphorylations of MAPK family members and Akt. Fig. S8. Aberrant YAP/TAZ activation in PIP5Kα KO cells under different cell density and serum stimulation conditions. Fig. S9. Dislocation of LATS1 from the PM upon serum stimulation. Fig. S10. Lack of binding affinity of PIP5Kα N-terminal and CT domains for Merlin and LATS1. Fig. S11. PIP5Kα truncated forms colocalize with Merlin and LATS1, and PIP5Kα colocalization with Merlin FERM domain. Fig. S12. Loss of interaction and colocalization of the Merlin L64P mutant with PIP5Kα. Fig. S13. Effects of Merlin and LATS1 ablation on PIP5Kα-induced phosphorylation of LATS1 and YAP. Fig. S14. Proposed model for a potential role of PIP5Kα in regulation of the Hippo pathway. Table S1. qRT-PCR primers used in this study.
Time-resolved Spectroscopy of the Polar EU Cancri in the Open Cluster Messier 67
Creators: name: Williams, Kurtis A.
name: Howell, Steve B.
name: Liebert, James
name: Smith, Paul S.
name: Bellini, Andrea
name: Rubin, Kate H. R.
name: Bolte, Michael
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present time-resolved spectroscopic and polarimetric observations of the AM Her system EU Cnc. EU Cnc is located near the core of the old open cluster Messier 67; new proper motion measurements indicate that EU Cnc is indeed a member of the star cluster, this system therefore is useful to constrain the formation and evolution of magnetic cataclysmic variables. The spectra exhibit two-component emission features with independent radial velocity variations as well as time-variable cyclotron emission indicating a magnetic field strength of 41 MG. The period of the radial velocity and cyclotron hump variations are consistent with the previously-known photometric period, and the spectroscopic flux variations are consistent in amplitude with previous photometric amplitude measurements. The secondary star is also detected in the spectrum. We also present polarimetric imaging measurements of EU Cnc that show a clear detection of polarization, and the degree of polarization drops below our detection threshold at phases when the cyclotron emission features are fading or not evident. The combined data are all consistent with the interpretation that EU Cnc is a low-state polar in the cluster Messier 67. The mass function of the system gives an estimate of the accretor mass of M_WD >= 0.68 M_sun with M_WD ~ 0.83 M_sun for an average inclination. We are thus able to place a lower limit on the progenitor mass of the accreting WD of >= 1.43 M_sun.
description: Accepted for publication in the Astronomical Journal. 9 pages, 5 figures, uses emulateapj
Orbital angular momentum entanglement in turbulence
Creators: name: Ibrahim, Alpha Hamadou
name: Roux, Filippus S.
name: McLaren, Melanie
name: Konrad, Thomas
name: Forbes, Andrew
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The turbulence induced decay of orbital angular momentum (OAM) entanglement between two photons is investigated numerically and experimentally. To compare our results with previous work, we simulate the turbulent atmosphere with a single phase screen based on the Kolmogorov theory of turbulence. We consider two different scenarios: in the first only one of the two photons propagates through turbulence, and in the second both photons propagate through uncorrelated turbulence. Comparing the entanglement evolution for different OAM values, we found the entanglement to be more robust in turbulence for higher OAM values. We derive an empirical formula for the distance scale at which entanglement decays in term of the scale parameters and the OAM value.
description: 10 pages, 7 figures, accepted in Phys. Rev. A
Radio shadowing in vehicle-to-vehicle communication at urban intersections : a measurement and simulation-based evaluation
Creators: name: Tchouankem, Hugues Narcisse
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2016
Subjects: subject: V2V
subject: VANET
subject: radio shadowing
subject: urban intersections
subject: intersection type
subject: Fahrzeugkommunikation
subject: Funkabschattung
subject: städtische Kreuzungen
subject: Kreuzungstopologie
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau::621 | Angewandte Physik::621,3 | Elektrotechnik, Elektronik

description: [no abstract]
Weighted estimation of the dependence function for an extreme-value distribution
Creators: name: Peng, Liang
name: Qian, Linyi
name: Yang, Jingping
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: Bivariate extreme-value distributions have been used in modeling extremes in environmental sciences and risk management. An important issue is estimating the dependence function, such as the Pickands dependence function. Some estimators for the Pickands dependence function have been studied by assuming that the marginals are known. Recently, Genest and Segers [Ann. Statist. 37 (2009) 2990-3022] derived the asymptotic distributions of those proposed estimators with marginal distributions replaced by the empirical distributions. In this article, we propose a class of weighted estimators including those of Genest and Segers (2009) as special cases. We propose a jackknife empirical likelihood method for constructing confidence intervals for the Pickands dependence function, which avoids estimating the complicated asymptotic variance. A simulation study demonstrates the effectiveness of our proposed jackknife empirical likelihood method.
description: Published in at http://dx.doi.org/10.3150/11-BEJ409 the Bernoulli (http://isi.cbs.nl/bernoulli/) by the International Statistical Institute/Bernoulli Society (http://isi.cbs.nl/BS/bshome.htm)
Receiver Antenna Phase Center Models and Their Impact on Geodetic Parameters
Creators: name: Kersten, Tobias
name: Schön, Steffen
Publisher: name: Cham : Springer
Year: 2016
Subjects: subject: Carrier phase centre variation (PCV)
subject: Generic patterns
subject: GNSS
subject: GNSS antennas
subject: Konferenzschrift
subject: Dewey Decimal Classification::500 | Naturwissenschaften::520 | Astronomie, Kartographie
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: Evaluating the impact of receiver antenna phase centre corrections (PCCs) in geodetic positioning and timing applications in a general way is quite challenging, because several estimation concepts, implementation philosophies as well as different sets of PCCs exist and interact with each other and their contributions are not identifiable. In this paper, the authors present a methodology, based on investigations of Geiger (GPS-techniques applied to geodesy and surveying. Lecture notes in earth sciences, vol 19. Springer, New York, pp 210–222, 1988) and Santerre (Manuscr Geodaet 16:28–53, 1991), to classify PCCs and forecast their impact on all geodetic parameters, i.e. not only the position but also the receiver clock and troposphere parameter in a phase based precise point positioning (PPP) approach. In a first step, we introduce the mathematical model and generic PCC patterns. In the second step, simulation studies are carried out. Findings are evaluated by empirical studies using differences of PPP results to isolate the impact of different patterns. In parallel, the software impact is analysed since every software handles the observation modelling and parameter estimation differently, e.g., Kalman filter versus least squares approach. We show that all geodetic parameters are affected by PCC and that the impact on the parameters can be even amplified compared to the magnitude of the generic patterns. The final publication is available at Springer via https://doi.org/10.1007/1345_2016_233.
Vacuum polarization and induced Maxwell and Kalb-Ramond effective action in very special relativity
Creators: name: Maluf, Roberto V.
name: Olmo, Gonzalo J.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: This work investigates the implications of very special relativity (VSR) on the calculation of vacuum polarization for fermions in the presence of Maxwell and Kalb-Ramond gauge fields in four-dimensional spacetime. We derive the $SIM(2)$-covariant gauge theory associated with an Abelian antisymmetric 2-tensor and its corresponding field strength. We demonstrate that the free VSR-Kalb-Ramond electrodynamics is equivalent to a massive scalar field with a single polarization. Furthermore, we determine an explicit expression for the effective action involving Maxwell and Kalb-Ramond fields due to fermionic vacuum polarization at one-loop order. The quantum corrections generate divergences free of nonlocal terms only in the VSR-Maxwell sector. At the same time, we observe UV/IR mixing divergences due to the entanglement of VSR-nonlocal effects with quantum higher-derivative terms for the Kalb-Ramond field. However, in the lower energy limit, the effective action can be renormalized like in the Lorentz invariant case.
description: 26 pages, 3 figures
A normal-pressure MWPC for beam diagnostics at RIBLL2
Creators: name: Tang, Shu-Wen
name: Ma, Peng
name: Duan, Li-Min
name: Sun, Zhi-Yu
name: Lu, Chen-Gui
name: Yang, He-Run
name: Hu, Rong-Jiang
name: Huang, Wen-Xue
name: Xu, Hu-Shan
Publisher: name: arXiv
Year: 2013
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: A normal pressure MWPC for beam diagnostics at RIBLL2 has been developed, which has a sensitive area of 80 mm$\times$80 mm and consists of three-layer wire planes. The anode plane is designed with a wider frame to reduce the discharge and without using protection wires. The detector has been tested with a $^{55}$Fe X-ray source and a 200 MeV/u $^{12}$C beam from CSRm. A position resolution better than 250 $\upmu$m along the anode wires and a detection efficiency higher than 90% have been achieved.
description: 4 pages, 5 figures
Additional file 1 of A novel cysteine catalytic oxidation-based colorimetric approach for sensitive analysis of acute pancreatitis-related microRNA
Creators: name: Gong, Mingwei
name: Jiang, Guoyan
name: Rong, Yuan
name: Yang, Zeping
name: She, Dong
name: Sun, Chunhong
Publisher: name: figshare
Year: 2023
Subjects: subject: Biophysics
subject: Biochemistry
subject: Space Science
subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Molecular Biology
subject: Biotechnology
subject: 69999 Biological Sciences not elsewhere classified

description: Additional file 1. Fig. S1. The correlation between the calculated miRNA-21 concentration by the method and the initial concentration of miRNA-21. Table S1. Sequences of oligonucleotides used in this research.
Brighter galaxy bias: underestimating the velocity dispersions of galaxy clusters
Creators: name: Old, L.
name: Gray, M. E.
name: Pearce, F. R.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study the systematic bias introduced when selecting the spectroscopic redshifts of brighter cluster galaxies to estimate the velocity dispersion of galaxy clusters from both simulated and observational galaxy catalogues. We select clusters with Ngal > 50 at five low redshift snapshots from a semi-analytic model galaxy catalogue, and from a catalogue of SDSS DR8 groups and clusters across the redshift range 0.021
description: 11 pages, 9 figures. Accepted for publication in MNRAS
Layered convection as the origin of Saturn's luminosity anomaly
Creators: name: Leconte, Jérémy
name: Chabrier, Gilles
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: As they keep cooling and contracting, Solar System giant planets radiate more energy than they receive from the Sun. Applying the first and second principles of thermodynamics, one can determine their cooling rate, luminosity, and temperature at a given age. Measurements of Saturn's infrared intrinsic luminosity, however, reveal that this planet is significantly brighter than predicted for its age. This excess luminosity is usually attributed to the immiscibility of helium in the hydrogen-rich envelope, leading to "rains" of helium-rich droplets. Existing evolution calculations, however, suggest that the energy released by this sedimentation process may not be sufficient to resolve the puzzle. Here, we demonstrate using planetary evolution models that the presence of layered convection in Saturn's interior, generated, like in some parts of Earth oceans, by the presence of a compositional gradient, significantly reduces its cooling. It can explain the planet's present luminosity for a wide range of configurations without invoking any additional source of energy. This suggests a revision of the conventional homogeneous adiabatic interior paradigm for giant planets, and questions our ability to assess their heavy element content. This reinforces the possibility for layered convection to help explaining the anomalously large observed radii of extrasolar giant planets.
description: Published in Nature Geoscience. Online publication date: April 21st, 2013. Accepted version before journal editing and with Supplementary Information
Efficient sampling of noisy shallow circuits via monitored unraveling
Creators: name: Cheng, Zihan
name: Ippoliti, Matteo
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We introduce a classical algorithm for sampling the output of shallow, noisy random circuits on two-dimensional qubit arrays. The algorithm builds on the recently-proposed "space-evolving block decimation" (SEBD) and extends it to the case of noisy circuits. SEBD is based on a mapping of 2D unitary circuits to 1D {\it monitored} ones, which feature measurements alongside unitary gates; it exploits the presence of a measurement-induced entanglement phase transition to achieve efficient (approximate) sampling below a finite critical depth $T_c$. Our noisy-SEBD algorithm unravels the action of noise into measurements, further lowering entanglement and enabling efficient classical sampling up to larger circuit depths. We analyze a class of physically-relevant noise models (unital qubit channels) within a two-replica statistical mechanics treatment, finding weak measurements to be the optimal (i.e. most disentangling) unraveling. We then locate the noisy-SEBD complexity transition as a function of circuit depth and noise strength in realistic circuit models. As an illustrative example, we show that circuits on heavy-hexagon qubit arrays with noise rates of $\approx 2\%$ per CNOT, based on IBM Quantum processors, can be efficiently sampled up to a depth of 5 iSWAP (or 10 CNOT) gate layers. Our results help sharpen the requirements for practical hardness of simulation of noisy hardware.
description: 12+7 pages, 4+7 figures; v2: published version
Reactions of different populations of Corylus avellana L. and Prunus spinosa L. to drought and frost stress under controlled conditions
Creators: name: Wanjiku, James Gacheru
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2016
Subjects: subject: Area of origin
subject: biomarkers
subject: Federal Nature Conservation Act
subject: phenology
subject: frost damage
subject: populations
subject: predawn water potential
subject: relative water content
subject: stomata conductance
subject: Biomarker
subject: Bundesnaturschutzgesetz
subject: Frostschäden
subject: Phänologie
subject: predawn-Wasserpotenzial
subject: relativer Wassergehalt
subject: stomatäre Leitfähigkeit
subject: Vorkommen
subject: Vorkommensgebiete
subject: Dewey Decimal Classification::500 | Naturwissenschaften::580 | Pflanzen (Botanik)
subject: Dewey Decimal Classification::600 | Technik::630 | Landwirtschaft, Veterinärmedizin

description: [no abstract]
The recent gravitational wave observation by pulsar timing arrays and primordial black holes: the importance of non-gaussianities
Creators: name: Franciolini, Gabriele
name: Iovino, Antonio Junior
name: Vaskonen, Ville
name: Veermae, Hardi
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study whether the signal seen by pulsar timing arrays (PTAs) may originate from gravitational waves (GWs) induced by large primordial perturbations. Such perturbations may be accompanied by a sizeable primordial black hole (PBH) abundance. We improve existing analyses and show that PBH overproduction disfavors Gaussian scenarios for scalar-induced GWs at 2σ and single-field inflationary scenarios, accounting for non-Gaussianity, at 3σ as the explanation of the most constraining NANOGrav 15-year data. This tension can be relaxed in models where non-Gaussianites suppress the PBH abundance. On the flip side, the PTA data does not constrain the abundance of PBHs.
description: V3: Version published on PRL. 15 pages and 8 figures. Full article + supplementary materials. V1 appeared on Thu, 29 Jun 2023