cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Stop and sbottom search using dileptonic $M_{T2}$ variable and boosted top technique at the LHC
Creators: name: Chakraborty, Amit
name: Ghosh, Dilip Kumar
name: Ghosh, Diptimoy
name: Sengupta, Dipan
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The ATLAS and CMS experiments at the CERN LHC have collected about 20 $fb^{-1}$ of data each at the end of their 8 TeV run, and ruled out a huge swath of parameter space in the context of Minimally Supersymmetric Standard Model(MSSM). Limits on masses of the gluino ($\tilde{g}$) and the squarks of the first two generations($\tilde{q}$) have been pushed to the TeV range. Light third generation squarks namely stop and sbottom of sub-TeV masses, on the other hand, are still allowed by their direct search limits. Interestingly, the discovery of a Standard Model(SM) higgs boson like particle with a mass of $\sim$ 125 GeV favours a light third generation which is also motivated by naturalness arguments. Decays of stop and sbottom quarks can in general produce a number of distinct final states which necessitate different search strategies in the collider experiments. In this paper we, on the other hand, propose a general search strategy to look for third generation squarks in the final state which contains a top quark in the sample along with two additional hard leptons and substantial missing transverse momentum. We illustrate that a search strategy using the dileptonic $M_{T2}$, the effective mass $m_{eff}$ and jet substructure to reconstruct the hadronic top quark can be very effective to reduce the SM backgrounds. With the proposed search strategy, we estimate that the third generation squarks with masses up to about 800 GeV can be probed at the 14 TeV LHC with a 100 $fb^{-1}$ data set. We also interpret our results in two simplified scenarios where we consider the stop (sbottom) pair production followed by their subsequent decay to a top quark and the second lightest neutralino (lightest chargino). In this case also we find that stop (sbottom) mass up to 1 TeV (0.9 TeV) can be discovered at the 14 TeV LHC with 100 $fb^{-1}$ integrated luminosity.
description: Estimate of detector effects and some more benchmark points have been included, more discussion and references added, accepted for publication in JHEP
Die Unbekannten von Paris. Geschichte der modernen kolumbianischen Bildhauerei / Les inconnus de Paris: une histoire de la sculpture moderne colombienne
Creators: name: Mejia, Adriana Pena
Publisher: name: Deutsches Forum für Kunstgeschichte (DFK Paris): Jahresbericht / Rapport annuel
Year: 2016

description: -
description: Deutsches Forum für Kunstgeschichte (DFK Paris): Jahresbericht / Rapport annuel, Jahresbericht / Rapport annuel 2014/2015
Spectral and Imaging Diagnostics of Spatially-Extended Turbulent Electron Acceleration and Transport in Solar Flares
Creators: name: Stores, Morgan
name: Jeffrey, Natasha L. S.
name: McLaughlin, James A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Solar flares are efficient particle accelerators with a large fraction of released magnetic energy (10-50%) converted into energetic particles such as hard X-ray producing electrons. This energy transfer process is not well constrained, with competing theories regarding the acceleration mechanism(s), including MHD turbulence. We perform a detailed parameter study examining how various properties of the acceleration region, including its spatial extent and the spatial distribution of turbulence, affect the observed electron properties, such as those routinely determined from X-ray imaging and spectroscopy. Here, a time-independent Fokker-Planck equation is used to describe the acceleration and transport of flare electrons through a coronal plasma of finite temperature. Motivated by recent non-thermal line broadening observations that suggested extended regions of turbulence in coronal loops, an extended turbulent acceleration region is incorporated into the model. We produce outputs for the density weighted electron flux, a quantity directly related to observed X-rays, modelled in energy and space from the corona to chromosphere. We find that by combining several spectral and imaging diagnostics (such as spectral index differences or ratios, energy or spatial-dependent flux ratios, and electron depths into the chromosphere) the acceleration properties, including the timescale and velocity dependence, can be constrained alongside the spatial properties. Our diagnostics provide a foundation for constraining the properties of acceleration in an individual flare from X-ray imaging spectroscopy alone, and can be applied to past, current and future observations including those from RHESSI and Solar Orbiter.
description: ApJ Accepted
THE LIGHT FROM THE SHOVOT
Creators: name: Ismailov, Tokhirjon
Publisher: name: Zenodo
Year: 2024

description: "If if the economy is the body of society's life, its soul and spirit is spirituality. We new Uzbekistan set up as we decided to do, on two strong pillars we rely The first is the market principles based on strong economy. The second is the rich heritage of our ancestors and based on national values strong spirituality," he says
Hierarchical triple mergers: testing Hawking's area theorem with the inspiral signals
Creators: name: Tang, Shao-Peng
name: Fan, Yi-Zhong
name: Wei, Da-Ming
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Hawking's area theorem is one of the fundamental laws of black holes (BHs), which has been tested at a confidence level of $\sim 95\%$ with gravitational wave (GW) observations by analysing the inspiral and ringdown portions of GW signals, independently. In this work, we propose to carry out the test in a new way with the hierarchical triple merger (i.e., two successive BH mergers occurred sequentially within the observation window of GW detectors), for which the properties of the progenitor BHs and the remnant BH of the first coalescence can be inferred from the inspiral portions of the two mergers. As revealed in our simulations, the BH area law can be well confirmed for some plausible hierarchical triple merger events detectable in LIGO/Virgo/KAGRA/LIGO-India's O4/O5 runs. Our proposed method provides significant facilitation for testing the area law and complements previous methods.
description: 8 pages, 8 figures, 2 tables, published in MNRAS
Photomeric analysis of eclipsing binaries: VY UMI, RU UMI AND GSC 04364-00648
Creators: name: Kudak, V.
name: Parimucha, Š.
name: Perig, V.
name: Gajdoš, P.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present the photometric analysis of \textit{BVR} and \textit{TESS} light curves of three eclipsing binaries (RU~UMi and purely studied VY~UMi, GSC 04364-00648), together with their period changes considering archival data and new minima times from our and \textit{TESS} observations. For the first time we detected wave-like variations with low-amplitude in $O-C$ residua of RU UMi, which can be interpreted as a consequence of the light-time effect caused by the 3rd invisible component with period 7370 days. Period increase with rate 2.56(9)$\times10^{-7}$~d/yr$^{-1}$ detected in the VY UMi system corresponds to mass transfer from the secondary to the primary component. For GSC 04364-00648 binary system we find some quadratic changes on the $O-C$ diagram, which corresponds to a period decrease with a high rate of $-2.26(5)\times10^{-5}$~d/yr$^{-1}$. We cannot assumptions about their nature, mainly due to short time of observation and uneven coverage of $O-C$ diagram. We also determined the absolute parameter of their components using the photometric solution and \textit{GAIA} distances.
description: accepted to REVISTA MEXICANA DE ASTRONOM\'IA Y ASTROF\'ISICA. arXiv admin note: text overlap with arXiv:2102.09839
ArtTransForm. Transnationale Künstlerausbildung zwischen Frankreich und Deutschland, 1793–1870 / ArtTransForm. Formations artistiques transnationales entre la France et l’Allemagne, 1793–1870
Creators: name: Redaktion, Die
Publisher: name: Deutsches Forum für Kunstgeschichte (DFK Paris): Jahresbericht / Rapport annuel
Year: 2016

description: -
description: Deutsches Forum für Kunstgeschichte (DFK Paris): Jahresbericht / Rapport annuel, Jahresbericht / Rapport annuel 2014/2015
On using "climatology" as a reference strategy in the Brier and ranked probability skill scores
Creators: name: Mason, Simon J.
Publisher: name: Columbia University
Year: 2004
Subjects: Climatology
Long-range weather forecasting
Climatic changes--Forecasting

description: The Brier and ranked probability skill scores are widely used as skill metrics of probabilistic forecasts of weather and climate. As skill scores, they compare the extent to which a forecast strategy outperforms a (usually simpler) reference forecast strategy. The most widely used reference strategy is that of ‘‘climatology,’’ in which the climatological probability (or probabilities in the case of the ranked probability skill score) of the forecast variable is issued perpetually. The Brier and ranked probability skill scores are often considered harsh standards. It is shown that the scores are harsh because the expected value of these skill scores is less than 0 if nonclimatological forecast probabilities are issued. As a result, negative skill scores can often hide useful information content in the forecasts. An alternative formulation of the skill scores based on a reference strategy in which the outcome is independent of the forecast is equivalent to using randomly assigned probabilities but is not strictly proper. Nevertheless, positive values of the Brier skill score with random guessing as a strategy correspond to positive-sloping reliability curves, which is intuitively appealing because of the implication that the conditional probability of the forecast event increases as the forecast probability increases.
Reading charge transport from spin dynamics on the surface of topological insulator
Creators: name: Liu, Xin
name: Sinova, Jairo
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Resolving the conductance of the topological surface states (TSSs) from the bulk contribution has been a great challenge for studying the transport property of topological insulators. By developing a non-purturbative diffusion equation that describes fully the spin-charge dynamics in the strong spin-orbit coupling regime, we present a proposal to read the charge transport information of TSSs from its spin dynamics which can be isolated from the bulk contribution by time-resolved second harmonic generation pump-probe measurement. We demonstrate the qualitatively different Dyaknov-Perel spin relaxation behavior between the TSSs and the two-dimensional spin-orbit coupling electron gas. The decay time of both in-plane and out-of-plane spin polarization is naturally proved to be identical to the charge transport time. The out-of-plane spin dynamics is shown to be in the experimentally reachable regime of the femtosecond pump probe spectroscopy and thereby we suggest experiments to detect the charge transport property of the TSSs from their unique spin dynamics.
description: 5 pages, 2 figures + Supplementary Material; Accepted by Physical Review Letters
Wissenschaftliche Bearbeitung des Palais Beauharnais, Residenz des Deutschen Botschafters in Paris / Étude scientifique du palais Beauharnais, résidence de l’ambassadeur d’Allemagne à Paris
Creators: name: Redaktion, Die
Publisher: name: Deutsches Forum für Kunstgeschichte (DFK Paris): Jahresbericht / Rapport annuel
Year: 2016

description: -
description: Deutsches Forum für Kunstgeschichte (DFK Paris): Jahresbericht / Rapport annuel, Jahresbericht / Rapport annuel 2014/2015
title: Σύγκριση μεθόδων call admission control για μετάδοση κίνησης βίντεο πάνω σε ασύρματα κυψελωτά δίκτυα
Creators: name: Στάμος Χαράλαμπος
Publisher: name: Technical University of Crete
Year: 2012

description: Μη διαθέσιμο
Ionization efficiency for nuclear recoils in silicon from $\sim 50$ eV to $3$ MeV
Creators: name: Sarkis, Y.
name: Aguilar-Arevalo, A.
name: D'Olivo, J. C.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We present a model for the nuclear recoil ionization efficiency in silicon based on an extension of Lindhard's theory where atomic bond disruption is modeled as a function of the initial ion energy, the interatomic potential, and the average ion-vacancy production energy. A better description of the electronic stopping than the one assumed by Lindhard, the effect of electronic straggling, as well as charge screening and Coulomb repulsion effects of ions are also considered. The model describes the available data over nearly four orders of magnitude in nuclear recoil energy.
description: 5 pages, 3 figures
Mittelalter und Mittelalterbild / Le Moyen Âge et son image
Creators: name: Redaktion, Die
Publisher: name: Deutsches Forum für Kunstgeschichte (DFK Paris): Jahresbericht / Rapport annuel
Year: 2017

description: -
description: Deutsches Forum für Kunstgeschichte (DFK Paris): Jahresbericht / Rapport annuel, Jahresbericht / Rapport annuel 2015/2016
A generic forecast verification framework for administrative purposes
Creators: name: Mason, Simon J.
name: Weigel, Andreas
Publisher: name: Columbia University
Year: 2009
Subjects: Long-range weather forecasting
Statistical weather forecasting--Methodology
Climatic changes--Information services

description: There are numerous reasons for calculating forecast verification scores, and considerable attention has been given to designing and analyzing the properties of scores that can be used for scientific purposes. Much less attention has been given to scores that may be useful for administrative reasons, such as communicating changes in forecast quality to bureaucrats and providing indications of forecast quality to the general public. The two-alternative forced choice (2AFC) test is proposed as a scoring procedure that is sufficiently generic to be usable on forecasts ranging from simple yes–no forecasts of dichotomous outcomes to forecasts of continuous variables, and can be used with deterministic or probabilistic forecasts without seriously reducing the more complex information when available. Although, as with any single verification score, the proposed test has limitations, it does have broad intuitive appeal in that the expected score of an unskilled set of forecasts (random guessing or perpetually identical forecasts) is 50%, and is interpretable as an indication of how often the forecasts are correct, even when the forecasts are expressed probabilistically and/or the observations are not discrete.
Highly-stable, flexible delivery of microjoule-level ultrafast pulses in vacuumized anti-resonant hollow-core fibers for active synchronization
Creators: name: Yan, Chuanchuan
name: Li, Hongyang
name: Huang, Zhiyuan
name: Wang, Xinliang
name: Liu, Donghan
name: Liu, Xingyan
name: Pan, Jinyu
name: Luo, Zhuozhao
name: Yang, Fei
name: Zheng, Yu
name: Yin, Ruochen
name: Yu, Haihu
name: Leng, Yuxin
name: Song, Liwei
name: Pang, Meng
name: Jiang, Xin
Publisher: name: arXiv
Year: 2023
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We demonstrate the stable and flexible light delivery of multi-μJ, sub-200-fs pulses over a ~10-m-long vacuumized anti-resonant hollow-core fiber (AR-HCF), which was successfully used for high-performance pulse synchronization. Compared with the pulse train launched into the AR-HCF, the transmitted pulse train out of the fiber exhibits excellent stabilities in pulse power and spectrum, with pointing stability largely improved. The walk-off between the fiber-delivery and the other free-space-propagation pulse trains, in an open loop, was measured to be <6 fs root-mean-square (RMS) over 90 minutes, corresponding to a relative optical-path variation of <2x10-7. This walk-off can be further suppressed to ~2 fs RMS simply using an active control loop, highlighting the great application potentials of this AR-HCF set-up in large-scale laser and accelerator facilities.
title: Εφαρμοσμένη θεωρία των martingales
Creators: name: Παλιεράκη Αθηνά
Publisher: name: Technical University of Crete
Year: 2006

description:  Πιθανότητες -- 2. Τυχαίοι περίπατοι -- 3. Κλαδωτές αλυσίδες -- 4. Δεσμευμένη πιθανότητα -- 5. Δεσμευμένη μέση τιμή -- 6. Martingales -- 7. Εφαρμογές των martingales
title: Μελέτη μηχανικής συμπεριφοράς εμφυτεύματος ολικής αρθροπλαστικής ισχίου
Creators: name: Μουλιώτας Κωνσταντίνος
Publisher: name: Technical University of Crete
Year: 2003

description: φ. 1: Ανατομία της διάρθρωσης του ισχίου της γλουτιαίας περιοχής και του μηρού -- Κεφ. 2: Εμβιομηχανικές απόψεις των κινήσεων του ισχίου -- Κεφ. 3: Το εμφύτευμα -- Κεφ. 4: Η μέθοδος των πεπερασμένων στοιχείων -- Κεφ. 5: Μεθοδολογία
Cosmology from the Thermal Sunyaev-Zel'dovich Power Spectrum: Primordial non-Gaussianity and Massive Neutrinos
Creators: name: Hill, J. Colin
name: Pajer, Enrico
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We carry out a comprehensive analysis of the possible constraints on cosmological and astrophysical parameters achievable with measurements of the thermal Sunyaev-Zel'dovich (tSZ) power spectrum from upcoming full-sky CMB observations, with a particular focus on one-parameter extensions to the LCDM standard model involving local primordial non-Gaussianity (described by fNL) and massive neutrinos (described by Mnu). We include all of the relevant physical effects due to these additional parameters, including the change to the halo mass function and the scale-dependent halo bias induced by local primordial non-Gaussianity. [...] We compute forecasts for Planck, PIXIE, and a cosmic variance (CV)-limited experiment, using multifrequency subtraction to remove foregrounds and implementing two masking criteria based on the ROSAT and eROSITA cluster catalogs to reduce the significant CV errors at low multipoles. We find that Planck can detect the tSZ power spectrum with >30-sigma significance, regardless of the masking scenario. However, neither Planck or PIXIE is likely to provide competitive constraints on fNL from the tSZ power spectrum due to CV noise at low-ell overwhelming the unique signature of the scale-dependent bias. A future CV-limited experiment could provide a 3-sigma detection of fNL~37, which is the WMAP9 maximum-likelihood result. The outlook for neutrino masses is more optimistic: Planck can reach levels comparable to the current upper bounds ~<0.3 eV with conservative assumptions about the intracluster medium (ICM); stronger ICM priors could allow Planck to provide 1-2-sigma evidence for massive neutrinos from the tSZ power spectrum, depending on the true value of the sum of the neutrino masses. We also forecast a ~<10% constraint on the outer slope of the ICM pressure profile using the unmasked Planck tSZ power spectrum.
description: v1: 45 pages, 26 figures, PRD submitted. The tSZ power spectrum Fisher matrices are made available at http://www.astro.princeton.edu/~jch/tSZFisher . v2: matches PRD accepted version; conclusions unchanged; new appendix compares the forecasts to the publicly released Planck tSZ power spectrum results
Qubit-oscillator concatenated codes: decoding formalism & code comparison
Creators: name: Xu, Yijia
name: Wang, Yixu
name: Kuo, En-Jui
name: Albert, Victor V.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Concatenating bosonic error-correcting codes with qubit codes can substantially boost the error-correcting power of the original qubit codes. It is not clear how to concatenate optimally, given there are several bosonic codes and concatenation schemes to choose from, including the recently discovered GKP-stabilizer codes [Phys. Rev. Lett. 125, 080503 (2020)}] that allow protection of a logical bosonic mode from fluctuations of the mode's conjugate variables. We develop efficient maximum-likelihood decoders for and analyze the performance of three different concatenations of codes taken from the following set: qubit stabilizer codes, analog/Gaussian stabilizer codes, GKP codes, and GKP-stabilizer codes. We benchmark decoder performance against additive Gaussian white noise, corroborating our numerics with analytical calculations. We observe that the concatenation involving GKP-stabilizer codes outperforms the more conventional concatenation of a qubit stabilizer code with a GKP code in some cases. We also propose a GKP-stabilizer code that suppresses fluctuations in both conjugate variables without extra quadrature squeezing, and formulate qudit versions of GKP-stabilizer codes.
description: 20 pages, 8 figures
title: Hermite collocation μέθοδοι για σταθερές καταστάσεις προβλημάτων μεταφοράς-διάχυσης
Creators: name: Τσιβουράκης Μιχαήλ
Publisher: name: Technical University of Crete
Year: 2004

description:  Εισαγωγή -- 2. Upwind Hermite Collocation -- 3. Adaptive h-Refinement μέθοδοι
Whistler waves generated inside magnetic dips in the young solar wind: observations of the Search-Coil Magnetometer on board Parker Solar Probe
Creators: name: Froment, C.
name: Agapitov, O. V.
name: Krasnoselskikh, V.
name: Karbashewski, S.
name: de Wit, T. Dudok
name: Larosa, A.
name: Colomban, L.
name: Malaspina, D.
name: Kretzschmar, M.
name: Jagarlamudi, V. K.
name: Bale, S. D.
name: Bonnell, J. W.
name: Mozer, F. S.
name: Pulupa, M.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: Context. Whistler waves are electromagnetic waves produced by electron-driven instabilities, that in turn can reshape the electron distributions via wave-particle interactions. In the solar wind, they are one of the main candidates for explaining the scattering of the strahl electron population into the halo at increasing radial distances from the Sun and for subsequently regulating the solar wind heat flux. However, it is unclear what type of instability dominates to drive whistlers in the solar wind. Aims. Our goal is to study whistler wave parameters in the young solar wind sampled by Parker Solar Probe (PSP). The wave normal angle (WNA) in particular is a key parameter to discriminate between the generation mechanisms of these waves. Methods. We analyze the cross-spectral matrices of magnetic fieldfluctuations measured by the Search-Coil Magnetometer (SCM) and processed by the Digital Fields Board (DFB) from the FIELDS suite during PSP's first perihelion. Results. Among the 2701 wave packets detected in the cross spectra, namely individual bins in time and frequency, most were quasi-parallel to the background magnetic field but a significant part (3%) of observed waves had oblique (> 45°) WNA. The validation analysis conducted with the time-series waveforms reveal that this percentage is a lower limit. Moreover, we find that about 64% of the whistler waves detected in the spectra are associated with at least one magnetic dip. Conclusions. We conclude that magnetic dips provides favorable conditions for the generation of whistler waves. We hypothesize that the whistlers detected in magnetic dips are locally generated by the thermal anisotropy as quasi-parallel and can gain obliqueness during their propagation. We finally discuss the implication of our results for the scattering of the strahl in the solar wind.
description: 15 pages, 14 figures, recommended for publication in A&A
Veranstaltungsarten / Manifestations
Creators: name: Redaktion, Die
Publisher: name: Deutsches Forum für Kunstgeschichte (DFK Paris): Jahresbericht / Rapport annuel
Year: 2017

description: -
description: Deutsches Forum für Kunstgeschichte (DFK Paris): Jahresbericht / Rapport annuel, Jahresbericht / Rapport annuel 2015/2016
Normalizing Flows for Interventional Density Estimation
Creators: name: Melnychuk, Valentyn
name: Frauen, Dennis
name: Feuerriegel, Stefan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences

description: Existing machine learning methods for causal inference usually estimate quantities expressed via the mean of potential outcomes (e.g., average treatment effect). However, such quantities do not capture the full information about the distribution of potential outcomes. In this work, we estimate the density of potential outcomes after interventions from observational data. For this, we propose a novel, fully-parametric deep learning method called Interventional Normalizing Flows. Specifically, we combine two normalizing flows, namely (i) a nuisance flow for estimating nuisance parameters and (ii) a target flow for parametric estimation of the density of potential outcomes. We further develop a tractable optimization objective based on a one-step bias correction for efficient and doubly robust estimation of the target flow parameters. As a result, our Interventional Normalizing Flows offer a properly normalized density estimator. Across various experiments, we demonstrate that our Interventional Normalizing Flows are expressive and highly effective, and scale well with both sample size and high-dimensional confounding. To the best of our knowledge, our Interventional Normalizing Flows are the first proper fully-parametric, deep learning method for density estimation of potential outcomes.
The miniJPAS survey: AGN & host galaxy co-evolution of X-ray selected sources
Creators: name: López, I. E.
name: Brusa, M.
name: Bonoli, S.
name: Shankar, F.
name: Acharya, N.
name: Laloux, B.
name: Dolag, K.
name: Georgakakis, A.
name: Lapi, A.
name: Almeida, C. Ramos
name: Salvato, M.
name: Chaves-Montero, J.
name: Coelho, P.
name: Díaz-García, L. A.
name: Fernández-Ontiveros, J. A.
name: Hernán-Caballero, A.
name: Delgado, R. M. González
name: Marquez, I.
name: Pović, M.
name: Soria, R.
name: Queiroz, C.
name: Rahna, P. T.
name: Abramo, R.
name: Alcaniz, J.
name: Benitez, N.
name: Carneiro, S.
name: Cenarro, J.
name: Cristóbal-Hornillos, D.
name: Dupke, R.
name: Ederoclite, A.
name: López-Sanjuan, C.
name: Marín-Franch, A.
name: de Oliveira, C. Mendes
name: Moles, M.
name: Sodré, L.
name: Taylor, K.
name: Varela, J.
name: Ramió, H. V.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Studies indicate strong evidence of a scaling relation in the local Universe between the supermassive black hole mass ($M_\rm{BH}$) and the stellar mass of their host galaxies ($M_\star$). They even show similar histories across cosmic times of their differential terms: star formation rate (SFR) and black hole accretion rate (BHAR). However, a clear picture of this coevolution is far from being understood. We select an X-ray sample of active galactic nuclei (AGN) up to $z=2.5$ in the miniJPAS footprint. Their X-ray to infrared spectral energy distributions (SEDs) have been modeled with CIGALE, constraining the emission to 68 bands. For a final sample of 308 galaxies, we derive their physical properties (e.g., $M_\star$, $\rm{SFR}$, $\rm{SFH}$, and $L_\rm{AGN}$). We also fit their optical spectra for a subsample of 113 sources to estimate the $M_\rm{BH}$. We calculate the BHAR depending on two radiative efficiency regimes. We find that the Eddington ratios ($λ$) and its popular proxy ($L_\rm{X}$/$M_\star$) have 0.6 dex of difference, and a KS-test indicates that they come from different distributions. Our sources exhibit a considerable scatter on the $M_\rm{BH}$-$M_\star$ relation, which can explain the difference between $λ$ and its proxy. We also model three evolution scenarios to recover the integral properties at $z=0$. Using the SFR and BHAR, we show a notable diminution in the scattering between $M_\rm{BH}$-$M_\star$. For the last scenario, we consider the SFH and a simple energy budget for the AGN accretion, obtaining a relation similar to the local Universe. Our study covers $\sim 1$ deg$^2$ in the sky and is sensitive to biases in luminosity. Nevertheless, we show that, for bright sources, the link between SFR and BHAR, and their decoupling based on an energy limit is the key that leads to the local $M_\rm{BH}$-$M_\star$ scaling relation.
description: Accepted for publication in A&A
title: Βέλτιστος σχεδιασμός επεμβάσεων ενίσχυσης σε δομικούς φορείς, εφαρμογή στην προένταση
Creators: name: Σταυρουλάκη Μαρία
Publisher: name: Technical University of Crete
Year: 1996

description: φ. 1: Εισαγωγή -- Κεφ. 2: Προσομοίωση μηχανικής συμπεριφοράς υλικού και κατασκευής από φέρουσα τοιχοποιµια, σε στατική και δυναμική φόρτιση -- Κεφ. 3: Μέθοδοι επεμβάσεων ενίσχυσης κατασκευών από φέρουσα τοιχοποιµια -- Κεφ. 4: Δυναμική συμπεριφορά κατασκευών και επεμβάσεων -- Κεφ. 5: Μόρφωση και επίλυση προβλήματος βέλτιστης επέμβασης υπό στατική και δυναμική (φασματική) φόρτιση -- Κεφ. 6: Αριθμητικά παραδείγματα - Εφαρμογές
Progress on Quantum Discord of Two Qubit states: Optimization and Upper Bound
Creators: name: Akhtarshenas, S. Javad
name: Mohammadi, Hamidreza
name: Mousavi, Fahimeh S.
name: Nassajpour, Vahid
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Calculation of the quantum discord requires to find the minimum of the quantum conditional entropy $S(ρ^{AB}|\{Π^B_{k}\})$ over all measurements on the subsystem $B$. In this paper, we provide a simple relation for the conditional entropy as the difference of two Shannon entropies. The relation is suitable for calculation of the quantum discord in the sense that it can by used to obtain the quantum discord for some classes of two-qubit states, without the need for minimization. We also present an analytical procedure of optimization and obtain conditions under which the quantum conditional entropy of a general two-qubit state is stationary. The presented relation is also used to find a tight upper bound on the quantum discord.
description: 7 pages, 2 figures, Title fixed
title: Συνέργια της επιφανειακής και της επαγόμενης μέσω φορέα προώθησης κατά την αντίδραση αναγωγής των οξειδίων του αζώτου (NOx) από μονοξείδιο του άνθρακα (CO) και υδρογόνο (H2) σε συνθήκες περίσσειας οξυγόνου (O2) με καταλύτες Pd(K)/Al2O3-TiO2
Creators: name: Βροντάκη Μαγδαληνή
Publisher: name: Technical University of Crete
Year: 2006

description:  Εισαγωγή -- 2. Θεωρητικό μέρος -- 2.1. Ατμοσφαιρική Ρύπανση -- 2.2. Οξείδια του αζώτου -- 2.3. Καταλυτικοί Μετατροπείς -- 2.4. Κινητήρες Lean Burn -- 2.5. Εκλεκτική καταλυτική αγωγή των NOx -- Α)Ζεόλιθοι -- Β)Καταλύτες ευγενών μετάλλων -- 2.6. Προώθηση στην κατάλυση -- 2.6.1. Επιφανειακή προώθηση -- 2.6.2. Μηχανισμός  της επιφανειακής προώθησης -- 3. Πειραματικό μέρος -- 4. Αποτελέσματα -- α)Εφαρμογή της προώθησης μέσω τροποποίησης του φορέα με TiO2 -- β)Εφαρμογή της επιφανειακής προώθησης με προσθήκη K -- γ)Ταυτόχρονη δράση των δύο μεθόδων προώθησης -- δ)Επίδραση εναπομείναντος Cl στη συμπεριφορά του συστήματος -- 5 Συζήτηση αποτελεσμάτων
Modest dust settling in the IRAS04302+2247 Class I protoplanetary disk
Creators: name: Villenave, M.
name: Podio, L.
name: Duchene, G.
name: Stapelfeldt, K. R.
name: Melis, C.
name: Carrasco-Gonzalez, C.
name: Gouellec, V. J. M. Le
name: Menard, F.
name: De Simone, M.
name: Chandler, C.
name: Garufi, A.
name: Pinte, C.
name: Bianchi, E.
name: Codella, C.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We present new VLA observations, between 6.8mm and 66mm, of the edge-on Class~I disk IRAS04302+2247. Observations at 6.8mm and 9.2mm lead to the detection of thermal emission from the disk, while shallow observations at the other wavelengths are used to correct for emission from other processes. The disk radial brightness profile transitions from broadly extended in previous ALMA 0.9mm and 2.1mm observations to much more centrally brightened at 6.8mm and 9.2mm, which can be explained by optical depth effects. The radiative transfer modeling of the 0.9mm, 2.1mm, and 9.2mm data suggests that the grains are smaller than 1cm in the outer regions of the disk and allows us to obtain the first lower limit for the scale height of grains emitting at millimeter wavelengths in a protoplanetary disk. We find that the millimeter dust scale height is between 1au and 6au at a radius 100au from the central star, while the gas scale height is estimated to be about 7au, indicating a modest level of settling. The estimated dust height is intermediate between less evolved Class 0 sources, that are found to be vertically thick, and more evolved Class II sources, which show a significant level of settling. This suggests that we are witnessing an intermediate stage of dust settling.
description: Accepted for publication in the Astrophysical Journal
Regional climate information for risk management: capabilities
Creators: name: Martinez, Rodney
name: Garanganga, Brad
name: Kamga, André
name: Luo, Yong
name: Mason, Simon J.
name: Pahalad, Janita
name: Rummukainen, Markku
Publisher: name: Columbia University
Year: 2010
Subjects: Climatic changes--Risk management
Long-range weather forecasting
Statistical weather forecasting
Climatic changes--Information services

description: A comprehensive review of regional capabilities to produce climate information for risk management around the world is done. Data access, quality control and the potential use of regional reanalyses is explained. Progress on seasonal forecast techniques, the increasing skill of statistical and dynamical methods and the challenges on dynamical downscaling and spatial resolution is presented. A comprehensive review of the progress of Regional Climate Outlook Forums around the world is done explaining the mutual learning process among providers and sectoral users, the opportunities created to develop better climate services for the disaster prevention and planning sectors, the lessons learnt and best practices. The potential of Regional Climate Centres (RCCs) to improve climate services is revised considering the experience of the formal RCCs and other centres working in different regions although not formally recognized as RCCs. Finally a detailed set of recommendations to enhance regional capabilities is listed.
title: Αλληλεπίδραση ακτινοβολίας λέϊζερ με την ύλη με έμφαση στην εξέταση φυσικών μηχανισμών που συμβαίνουν κατά την διάδοση χρονικά βραχέων παλμών λέϊζερ υψηλής έντασης σε αέρια και στερεά
Creators: name: Κορτσαλιουδάκης Ναθαναήλ
Publisher: name: Technical University of Crete
Year: 2006

description: Κεφ. 1. Εισαγωγή -- Κεφ. 2. Θεωρία διάδοσης βραχύχρονων παλμών λέιζερ υψηλής έντασης μέσα σε αέρια -- Κεφ. 3. Περιγραφή συστήματος λέιζερ που χρησιμοποιήθηκε στην παρούσα διατριβή -- Κεφ. 4. Διάδοση βραχύχρονων παλμών λέιζερ υπεριώδους υψηλής έντασης στον ατμοσφαιρικό αέρα σε διαφορετικές πιέσεις -- Κεφ. 5. Διάδοση βραχύχρονων παλμών λέιζερ υπεριώδους υψηλής έντασης στο Αργό σε διαφορετικές πιέσεις -- Κεφ. 6. Παραγωγή αρμονικών λόγω διάδοσης αυτο-οδηγούμενων παλμών λέιζερ υπεριώδους στο Αργό -- Κεφ. 7. Διάδοση βραχύχρονων παλμών λέιζερ υπεριώδους υψηλής έντασης σε στερεά -- Κεφ. 8. Εφαρμογή της διάδοσης αυτο-οδηγούμενων παλμών στην ατμοσφαιρική φυσική: Μελέτη τροποσφαιρκού όζοντος
Das Herrscherbild in Mitteleuropa gegen Ende des Mittelalters / La répresentation du souverain en Europe centrale à la fin du Moyen Âge
Creators: name: Ersek, Annamaria
Publisher: name: Deutsches Forum für Kunstgeschichte (DFK Paris): Jahresbericht / Rapport annuel
Year: 2017

description: -
description: Deutsches Forum für Kunstgeschichte (DFK Paris): Jahresbericht / Rapport annuel, Jahresbericht / Rapport annuel 2015/2016
A Comparative Study of Z$^{\prime}$ mediated Charged Lepton Flavor Violation at future lepton colliders
Creators: name: Li, Jingshu
name: Wang, Wanyue
name: Cai, Xunye
name: Yang, Chuxue
name: Lu, Meng
name: You, Zhengyun
name: Qian, Sitian
name: Li, Qiang
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Charged lepton flavor violation (CLFV) represents a transition between charged leptons of different generations that violates lepton flavor conservation, which is a clear signature of possible new physics beyond the standard model. By exploiting a typical example model of extra Z$^{\prime}$ gauge boson, we perform a detailed comparative study on CLFV searches at several future lepton colliders, including a 240 GeV electron-positron collider and a TeV scale muon collider. Based on detailed signal and background Monte-Carlo studies with fast detector simulations, we derive the potentials in searching for Z$^{\prime}$ mediated CLFV couplings with $eμ$, $eτ$ and $μτ$ of different future colliders. The results are compared with the current limits set by either low-energy experiments or the high-energy LHC experiments. We find that the sensitivity of the $τ$ related CLFV coupling strength at future lepton colliders will be significantly improved comparing with the current best constraints.
description: 11 pages, 5 figures
Bayesian Optimization of Sampling Densities in MRI
Creators: name: Gossard, Alban
name: de Gournay, Frédéric
name: Weiss, Pierre
Publisher: name: arXiv
Year: 2022
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Data-driven optimization of sampling patterns in MRI has recently received a significant attention.Following recent observations on the combinatorial number of minimizers in off-the-grid optimization, we propose a framework to globally optimize the sampling densities using Bayesian optimization. Using a dimension reduction technique, we optimize the sampling trajectories more than 20 times faster than conventional off-the-grid methods, with a restricted number of training samples. This method -- among other benefits -- discards the need of automatic differentiation.Its performance is slightly worse than state-of-the-art learned trajectories since it reduces the space of admissible trajectories, but comes with significant computational advantages.Other contributions include: i) a careful evaluation of the distance in probability space to generate trajectories ii) a specific training procedure on families of operators for unrolled reconstruction networks and iii) a gradient projection based scheme for trajectory optimization.
OwnReality. Jedem seine Wirklichkeit. Der Begriff der Wirklichkeit in der Bildenden Kunst in Frankreich, der BRD, DDR und Polen der 1960er bis Ende der 1980er Jahre (ERC) /  OwnReality. À chacun son réel. La notion de réel dans les arts plastiques en France, RFA, RDA, Pologne des années 1960 à la fin des années 1980 (ERC)
Creators: name: Redaktion, Die
Publisher: name: Deutsches Forum für Kunstgeschichte (DFK Paris): Jahresbericht / Rapport annuel
Year: 2017

description: -
description: Deutsches Forum für Kunstgeschichte (DFK Paris): Jahresbericht / Rapport annuel, Jahresbericht / Rapport annuel 2015/2016
Review of seasonal climate forecasting for agriculture in sub-Saharan Africa
Creators: name: Hansen, James W.
name: Mason, Simon J.
name: Sun, Liqiang
name: Tall, Arame
Publisher: name: Columbia University
Year: 2011
Subjects: Long-range weather forecasting
Climatic changes--Forecasting
Crops and climate
Agriculture

description: We review the use and value of seasonal climate forecasting for agriculture in sub-Saharan Africa (SSA), with a view to understanding and exploiting opportunities to realize more of its potential benefits. Interaction between the atmosphere and underlying oceans provides the basis for probabilistic forecasts of climate conditions at a seasonal lead-time, including during cropping seasons in parts of SSA. Regional climate outlook forums (RCOF) and national meteorological services (NMS) have been at the forefront of efforts to provide forecast information for agriculture.A survey showed that African NMS often go well beyond the RCOF process to improve seasonal forecast information and disseminate it to the agricultural sector. Evidence from a combination of understanding of how climatic uncertainty impacts agriculture, model based ex-ante analyses, subjective expressions of demand or value, and the few well-documented evaluations of actual use and resulting benefit suggests that seasonal forecasts may have considerable potential to improve agricultural management and rural livelihoods. However, constraints related to legitimacy, salience, access, understanding, capacity to respond and data scarcity have so far limited the widespread use and benefit from seasonal prediction among smallholder farmers. Those constraints that reflect inadequate information products, policies or institutional process can potentially be overcome. Additional opportunities to benefit rural communities come from expanding the use of seasonal forecast information for coordinating input and credit supply, food crisis management, trade and agricultural insurance. The surge of activity surrounding seasonal forecasting in SSA following the 1997/98 El Niño has waned in recent years, but emerging initiatives, such as the Global Framework for Climate Services and ClimDev-Africa, are poised to reinvigorate support for seasonal forecast information services for agriculture. We conclude with a discussion of institutional and policy changes that we believe will greatly enhance the benefits of seasonal forecasting to agriculture in SSA.
Lepton number and flavour violation in TeV-scale left-right symmetric theories with large left-right mixing
Creators: name: Barry, James
name: Rodejohann, Werner
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The various diagrams leading to neutrinoless double beta decay in the left-right symmetric model have different relative magnitudes, depending on the scale of new physics. Neutrinos acquire mass from both type I and/or type II seesaw terms, making an unambiguous analysis difficult. We study the half-life for double beta decay in the case of type II and type I dominance, in the former case including interference terms. If the heavy neutrinos of the type I seesaw model are at the TeV scale, certain processes can be enhanced. In particular, there are regions of parameter space in which the so-called lambda- and eta-diagrams can give sizable contributions to the half-life for the decay. We perform a detailed study of one such scenario, paying careful attention to constraints from lepton flavour violation.
description: 50 pages, 13 figures. Minor changes in text. Appendices added: (a) half-life correlations for Ge and Xe; (b) explicit numerical example. Results unchanged. Matches version published in JHEP
Wissenschaftliche Bearbeitung des Palais Beauharnais, Residenz des Deutschen Botschafters in Paris / Étude scientifique du palais Beauharnais, résidence de l’ambassadeur d’Allemagne à Paris
Creators: name: Redaktion, Die
Publisher: name: Deutsches Forum für Kunstgeschichte (DFK Paris): Jahresbericht / Rapport annuel
Year: 2017

description: -
description: Deutsches Forum für Kunstgeschichte (DFK Paris): Jahresbericht / Rapport annuel, Jahresbericht / Rapport annuel 2015/2016
Out-of-time-order correlators and quantum chaos
Creators: name: García-Mata, Ignacio
name: Jalabert, Rodolfo A.
name: Wisniacki, Diego A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: Quantum Chaos has originally emerged as the field which studies how the properties of classical chaotic systems arise in their quantum counterparts. The growing interest in quantum many-body systems, with no obvious classical meaning has led to consider time-dependent quantities that can help to characterize and redefine Quantum Chaos. This article reviews the prominent role that the out of time ordered correlator (OTOC) plays to achieve such goal.
description: Article to be submitted to Scholarpedia. 21 pages, 11 figures
A method for ensemble expansion and improved definition of forecast distributions from climate simulations
Creators: name: Graham, Nicholas E.
name: Mason, Simon J.
Publisher: name: Columbia University
Year: 2005
Subjects: Long-range weather forecasting
Long-range weather forecasting--Simulation methods
Climatic changes--Forecasting
Distribution (Probability theory)

description: Because of the inherently chaotic nature of the atmosphere, ensemble simulations are required to characterize a model’s response to the prescribed boundary forcing in probabilistic terms, particularly if the focus is on the probabilities of extreme events. At the same time, substantial computer resources are needed to produce routinely ensemble seasonal climate forecasts of sufficient size to make suitably reproducible estimates of such probabilities. We describe a method for artificially expanding the effective number of members in ensemble climate simulations on a seasonal basis, thereby reducing uncertainty in estimated probability distributions. As described here, the method involves calculating seasonal statistics using monthly values from all possible combinations of ensemble members. Under certain assumptions, this method is able to increase the effective ensemble size of an N-member M-month seasonal forecast by a factor of (asymptotically) M. One key assumption in this regard is that, aside from the effects of prescribed boundary conditions, the month-to-month values from a particular ensemble member are linear independent. This paper describes the behaviour of the ensemble expansion technique using both idealized and actual ensemble forecast data under a variety of conditions, drawing comparisons with an alternative parametric approach for ensemble expansion. A method for testing the assumption of linear independence in model simulations is also presented.
Digital quantum simulation of the BCS model with a central-spin-like quantum processor
Creators: name: Ruh, Jannis
name: Finsterhoelzl, Regina
name: Burkard, Guido
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The simulation of quantum systems is one of the most promising applications of quantum computers. In this paper we present a quantum algorithm to perform digital quantum simulations of the BCS model on a quantum register with a star shaped connectivity map, as it is, e.g., featured by color centers in diamond. We show how to effectively translate the problem onto the quantum hardware and implement the algorithm using only the native interactions between the qubits. Furthermore we discuss the complexity of the circuit. We use the algorithm to simulate the dynamics of the BCS model by subjecting its mean-field ground state to a time-dependent perturbation. The quantum simulation algorithm is studied using a classical simulation.
description: 16 pages, 8 figures
title: Ζωγραφική αρχιτεκτονική - η περίπτωση της Zoe Zenghelis και των ΟΜΑ
Creators: name: Σαχπατζιδου Δεσποινα
Publisher: name: Technical University of Crete
Year: 2015

description: Αυτή η ερευνητική ασχολείται ειδικά με την σχέση αρχιτεκτονικής ζωγραφικής και ειδικά με την λεγόμενη αρχιτεκτονική επί χάρτου. Αυτή τη μορφή αρχιτεκτονικής χρησιμοποιούσε και το γραφείο ΟΜΑ όταν είχαν την Zoe Zenghelis ως μέλος της ομάδας. Αυτή την αρχιτεκτονική αναφέρω και αναλυτικότερα.