cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Thermoelectric power of overdoped Tl2201 crystals: Charge density waves and $T^1$ and $T^2$ resistivities
Creators: name: Cooper, J. R.
name: Baglo, J. C.
name: Putzke, C.
name: Carrington, A.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report measurements of the in-plane thermoelectric power (TEP) for an overdoped (OD) crystal of the single layer cuprate superconductor Tl$_2$Ba$_2$CuO$_{6+x}$ (Tl2201) at several hole concentrations ($p$), from 300 or 400 K to below the superconducting transition temperature ($T_c$). For $p$ = 0.192 and 0.220, small upturns in the TEP below 150 K are attributed to the presence of charge density waves (CDW) detected by resonant inelastic X-ray scattering studies. This suggests that measurement of the TEP could provide a simple and effective guide to the presence of a CDW. Over a certain temperature range, often strongly restricted by the CDW, the TEP is consistent with the Nordheim-Gorter rule and the $T^1$ and $T^2$ terms in the in-plane resistivity of similar crystals observed below 160 K. Two scenarios in which the $T^1$ scattering term is uniform or non-uniform around the Fermi surface are discussed. As found previously by others, for uniform scattering the $T^1$ terms give scattering rates ($τ^{-1}$) at lower $p$ that are somewhat larger than the Planckian value $k_B T/\hbar$ and fall to zero for heavily OD crystals. Near 160 K, $τ^{-1}$ from the $T^2$ terms corresponds to the Planckian value.
description: 23 pages, 11 figures. This is the Accepted Manuscript version of an article accepted for publication in Superconductor Science and Technology
Acceleration Statistics as Measures of Statistical Persistence of Streamlines in Isotropic Turbulence
Creators: name: Goto, S.
name: Osborne, D. R.
name: Vassilicos, J. C.
name: Haigh, J. D.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We introduce the velocity (Vs) of stagnation points as a means to characterise and measure statistical persistence of streamlines. Using theoretical arguments, Direct Numerical Simulations (DNS) and Kinematic Simulations (KS) of three-dimensional isotropic turbulence for different ratios of inner to outer length scales L/eta of the self-similar range, we show that a frame exists where the average =0, that the r.m.s. values of acceleration (a'), turbulent fluid velocity (u') and Vs are related by La'/(u'^2) ~ (Vs/u')(L/eta)^(2/3+q) and that Vs/u' ~ (L/eta)^q with q=-1/3 in Kolmogorov turbulence, q=-1/6 in current DNS and q=0 in our KS. The statistical persistence hypothesis is closely related to the Tennekes sweeping hypothesis.
description: 4 pages, 2 figures, submitted to PRE
Non-Perturbative Bounds on Hyperfine-Induced Electron Spin Coherence Times
Creators: name: Shenvi, Neil
name: de Sousa, Rogerio
name: Whaley, K. Birgitta
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We address the decoherence of a localized electron spin in an external magnetic field due to the hyperfine interaction with a lattice of nuclear spins. Using a completely non-perturbative method, rigorous bounds on the T_1 and T_2 coherence times for the electron spin are provided. It is shown that for magnetic fields B greater than some critical field B_c (B_c ~ .001 - 2 Tesla for the systems studied here), the z-polarization of the electron spin cannot relax, and hence T_1 is infinite. However, even at high fields dephasing can still occur. We provide a lower bound on the T_2 coherence time that explicitly takes into account the effects of a spin echo pulse sequence.
description: 23 pages, 3 figures updated references, minor revisions
title: Vorschlag einer alternativen Formulierung der fiktiven Zusatzdämpfung für Eisenbahnbrücken
Creators: name: Treder, Leon Vincent
Publisher: name: TU Wien
Year: 2017
Subjects: subject: Zusatzdämpfung
subject: Eisenbahnbrücken

description: ImFokus der Arbeit steht die Formulierung einer alternativen fiktiven Zusatzdämpfung.Dazu werden folgende Fragestellungen untersucht: Anhand welcher alternativen Parameter kann die fiktive Zusatzdämpfung, zutreffender als bisher, definiertwerden?Wie kann ein Vorschlag zur alternativen Formulierung der fiktiven Zusatzdämpfung aussehen, der für möglichst viele Zugmodelle gilt? Zur Beantwortung dieser Fragen wurde eine Parameterstudie auf der Grundlage von realistischen Zug und Brückenkombinationen durchgeführt. Diese wurde im dimensionslosen Raum der Haupteinflussparameter der fiktiven Zusatzdämpfung berechnet. Dadurch war es möglich mit einer geringen Anzahl von Parameterkombinationen den gesamten recherchierten Zugparameterbereich abzudecken. Anschließend wurde die fiktive Zusatzdämpfung, als unterer Grenzwert des Zugparameterbereichs, auf die Brückenparameter rücktransformiert. Mit Hilfe der verwendeten Methodik war es möglich eine fiktive Zusatzdämpfung zu formulieren, die für den gesamten recherchierten Zugparameterbereich gilt. Des Weiteren ergab sich die Erkenntnis, dass eine Formulierung der fiktiven Zusatzdämpfung in Abhängigkeit eines Parameters unzureichend ist. Zutreffender ist der Vorschlag dieser Arbeit, die Beschreibung der fiktiven Zusatzdämpfung anhand folgender Brückeneigenschaften: der ersten Eigenfrequenz und Spannweite für einen Massenbelegungsbereich.
description: This thesis focuses on an alternative formulation of the additional damping method. The following questions are investigated: Which alternative parameters can be used to define the additional damping more accurately? How could an alternative additional damping be formulated, that applies to a wide range of train models? To answer these questions a parametric study based on realistic train and bridge combinations was carried out in the dimensionless space of the fundamental parameters of additional damping. By using the fundamental parameters it was possible to reduce the number of parameter combinations to cover the investgated range of train models. Subsequently, the additional damping was mapped onto the back-transformed bridge parameters as the lower bound for the investgated range of train models. This approach allows a formulation of the additional damping, which is applicable to the entire investgated range of train models. Furthermore, it was found that a formulation of the additional damping as a function of just one parameter is insufficient. Based on the research findings an alternative proposal for the additional damping is suggested, which is dependent on the following bridge characteristics: the first eigenfrequency and span length for a range of mass per unit length.
Dochody gospodarstw domowych emerytów w krajach UE
Creators: name: Wyrzykowski, Paweł
name: Wyrzykowski, Paweł
Publisher: name: Unknown
Year: 2014
Subjects: subject: Consumer/Household Economics
subject: International Relations/Trade
subject: household income
subject: retirement
subject: older people
subject: aging
subject: demographic
subject: / dochody gospodarstw domowych
subject: emeryci
subject: osoby starsze
subject: starzenie się
subject: demografia

description: Over the period of 2005-2012 the situation of households with members aged 65 years and over in the EU has improved. The median of equivalent incomes of these households has been 26.7% higher than in 2005, but it still has been lower than the median of incomes of people below 65 (9%). Risk of poverty of elderly people has decreased (4.4% index reduction). The process of the aging of the European society will affect a deterioration of situation of older people. In 2013-2060 in the every European Union country the demographic burden will increase (in average for the EU by 22.7 percentage points and by 2060, there will be only two adults in working age for every one person over the age of 65). As a result of the increase in the number of people in retirement age there will be an increase in the share of pensions in GDP by 2.3 percentage points but the ratio of the average pension paid in the public system in relation to the average wage in the whole economy will be reduced by 19%., The aging of the population in Poland will be deeper than in the EU. In 2060, Poland will be one of the oldest societies of the EU. This will affect the deterioration of the financial situation of Polish pensioners – the ratio of average pension to average earnings in the economy will decrease from 47% in 2010 to 22% in 2060. / Synopsis. W latach 2005-2012, w UE, sytuacja gospodarstw domowych osób w wieku 65 lat i więcej w UE uległa poprawie. Mediana ekwiwalentnych dochodów w tych gospodarstwach była o 26,7% wyższa niż w 2005 r., jednak pozostała niższa niż mediana dochodów osób w wieku poniżej 65 lat (o 9%). Zmniejszyło się zagrożenie ubóstwem społecznym osób starszych (wskaźnik obniżył się o 4,4 pkt. proc.). Proces starzenia się społeczeństwa europejskiego wpłynie na pogorszenie sytuacji dochodowej osób starszych. W latach 2013-2060, we wszystkich państwach UE wzrośnie wskaźnik obciążenia demograficznego osobami starszymi (średnio w UE o 22,7 pkt. proc. i w 2060 r. na jedną osobę w wieku 65+ będą przypadać 2 osoby w wieku 15-64 lat). W wyniku zwiększenia się liczby osób w wieku emerytalnym nastąpi wzrost udziału wypłacanych emerytur w PKB - o 2,3 pkt. proc., ale wskaźnik średniej emerytury wypłacanej w systemie publicznym w stosunku do średniej płacy w całej gospodarce zmniejszy się o 19%. W Polsce procesy starzenia się społeczeństwa będą głębsze niż w UE. W 2060 r. staniemy się jednym z najstarszych społeczeństw UE. Pogorszy się sytuacja dochodowa polskich emerytów - wskaźnik średniej emerytury do średniej płacy w całej gospodarce zmniejszy się z 47% w 2010 r. do 22% w 2060 r.
Compact Bright Radio-loud AGNs -- III. A Large VLBA Survey at 43 GHz
Creators: name: Cheng, X. -P.
name: An, T.
name: Frey, S.
name: Hong, X. -Y.
name: He, X.
name: Kellermann, K. I.
name: Lister, M. L.
name: Lao, B. -Q.
name: Li, X. -F.
name: Mohan, P.
name: Yang, J.
name: Wu, X. -C.
name: Zhang, Z. -L.
name: Zhang, Y. -K.
name: Zhao, W.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present the observational results from the 43-GHz Very Long Baseline Array (VLBA) observations of 124 compact radio-loud active galactic nuclei (AGNs) that were conducted between 2014 November and 2016 May. The typical dimensions of the restoring beam in each image are about 0.5 mas $\times$ 0.2 mas. The highest resolution of 0.2 mas corresponds to a physical size of 0.02 pc for the lowest redshift source in the sample. The 43-GHz very long baseline interferometry (VLBI) images of 97 AGNs are presented for the first time. We study the source compactness on milli-arcsec (mas) and sub-mas scales, and suggest that 95 sources in our sample are suitable for future space VLBI observations. By analyzing our data supplemented with other VLBA AGN surveys from literature, we find that the core brightness temperature increases with increasing frequency below a break frequency ~ 7 GHz, and decreases between ~7--240~GHz but increases again above~240 GHz in the rest frame of the sources. This indicates that the synchrotron opacity changes from optically thick to thin. We also find a strong statistical correlation between radio and $γ$-ray flux densities. Our correlation is tighter than those in literature derived from lower-frequency VLBI data, suggesting that the $γ$-ray emission is produced more co-spatially with the 43-GHz VLBA core emission. This correlation can also be extrapolated to the un-beamed AGN population, implying that a universal $γ$-ray production mechanism might be at work for all types of AGNs.
description: Accepted for publication in ApJS
Extremal function of intrinsic norms
Creators: name: Guan, Pengfei
Publisher: name: arXiv
Year: 2004
Subjects: subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 32W20

description: Through the study of the degenerate complex Monge-Ampère equation, we establish the optimal regularity of the extremal function associated to intrinsic norms of Chern-Levine-Nirenberg and Bedford-Taylor. We prove a conjecture of Chern-Levine-Nirenberg on the extended intrinsic norms on complex manifolds and verify Bedford-Taylor's representation formula for these norms in general.
description: 15 pages, published version
An Efficient VCGen-based Modular Verification of Relational Properties
Creators: name: Blatter, Lionel
name: Kosmatov, Nikolai
name: Prevosto, Virgile
name: Gall, Pascale Le
Publisher: name: arXiv
Year: 2024
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Deductive verification typically relies on function contracts that specify the behavior of each function for a single function call. Relational properties link several function calls together within a single specification. They can express more advanced properties of a given function, such as non-interference, continuity, or monotonicity, or relate calls to different functions, possibly run in parallel, for instance, to show the equivalence of two implementations. However, relational properties cannot be expressed and verified directly in the traditional setting of modular deductive verification. Recent work proposed a new technique for relational property verification that relies on a verification condition generator to produce logical formulas that must be verified to ensure a given relational property. This paper presents an overview of this approach and proposes important enhancements. We integrate an optimized verification condition generator and extend the underlying theory to show how relational properties can be proved in a modular way, where one relational property can be used to prove another one, like in modular verification of function contracts. Our results have been fully formalized and proved sound in the Coq proof assistant.
description: arXiv admin note: substantial text overlap with arXiv:2202.10349
Threshold Hyperon Production at COSY-11
Creators: name: Rozek, T.
name: Moskal, P.
name: Adam, H. -H.
name: Budzanowski, A.
name: Czyzykiewicz, R.
name: Grzonka, D.
name: Janusz, M.
name: Jarczyk, L.
name: Kamys, B.
name: Khoukaz, A.
name: Kilian, K.
name: Klaja, P.
name: Kowina, P.
name: Oelert, W.
name: Piskor-Ignatowicz, C.
name: Przerwa, J.
name: Santo, R.
name: Sefzick, T.
name: Siemaszko, M.
name: Smyrski, J.
name: Strzalkowski, A.
name: Taschner, A.
name: Winter, P.
name: Wolke, M.
name: Wustner, P.
name: Zipper, W.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The Lambda, Sigma0 and Sigma+ hyperon production in NN collisions is studied at the COSY - 11 installation in order to investigate the production mechanism as well as to extract information about the Y-N interaction.
description: 3 pages, 2 figures
SUSY Resonances from UHE neutralinos in Neutrino Telescopes and in the Sky
Creators: name: Datta, Anindya
name: Fargion, Daniele
name: Mele, Barbara
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: In the Top-down scenarios, the decay of super-heavy particles (m~10^{12-16}GeV), situated in dark-matter halos not very far from our Galaxy, can explain the ultra-high-energy (UHE) cosmic-ray spectrum beyond the Griesen-Zatasepin-Kuzmin cut-off. In the MSSM, a major component of the UHE cosmic-ray flux at PeV-EeV energies could be given by the lightest neutralino χ, that is the lightest stable supersymmetric particle. Then, the signal of UHE χ's on earth might emerge over the interactions of a comparable neutrino component. We compute the event rates for the resonant production of "right" selectrons and "right" squarks in mSUGRA, when UHE neutralinos of energy larger than 10^5 GeV scatter off electrons and quarks in an earth-based detector like IceCube. When the resonant channel dominates in the total χ-e,χ-q scattering cross section, the only model parameters affecting the corresponding visible signal rates turn out to be the physical masses of the resonant right-scalar and of the lightest neutralino. We compare the expected number of supersymmetric events with the rates corresponding to the expected Glashow W resonance and to the continuum UHE ν-N scattering for realistic power-law spectra. We find that the event rate in the leptonic selectron channel is particularly promising, and can reach a few tens for a one-year exposure in IceCube. Finally, we note that UHE neutralinos at much higher energies (up to hundreds ZeV) may produce sneutrino resonances by scattering off relic neutrinos in the Local Group hot dark halo. The consequent \tildeν-burst into hadronic final states could mimic Z-burst events, although with quite smaller conversion efficiency.
description: 23 pages, 4 figures; one reference added
A new way to constrain the densities of intra-group medium in groups of galaxies with convolutional neural networks
Creators: name: Shen, Austin X.
name: Bekki, Kenji
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Ram pressure (RP) can influence the evolution of cold gas content and star formation rates of galaxies. One of the key parameters for the strength of RP is the density of intra-group medium ($ρ_{\rm igm}$), which is difficult to estimate if the X-ray emission from it is too weak to be observed. We propose a new way to constrain $ρ_{\rm igm}$ through an application of convolutional neural networks (CNNs) to simulated gas density and kinematic maps galaxies under strong RP. We train CNNs using $9\times{}10^4$ 2D images of galaxies under various RP conditions, then validate performance with $10^4$ new test images. This new method can be applied to real observational data from ongoing WALLABY and SKA surveys to quickly obtain estimates of $ρ_{\rm igm}$. Simulated galaxy images have $1.0$ kpc resolution, which is consistent with that expected from the future WALLABY survey. The trained CNN models predict the normalised IGM density, $\hatρ_{\rm igm}$ where $0.0 \le \hatρ_{\rm igm, n} < 10.0$, accurately with root mean squared error values ($\rm RMSE$) of $0.72$, $0.83$ and $0.74$ for the density, kinematic and joined 2D maps, respectively. Trained models are unable to predict the relative velocity of galaxies with respect to the IGM ($v_{\rm rel}$) precisely, and struggle to generalise for different RP conditions. We apply our CNNs to the observed HI column density map of NGC 1566 in the Dorado group to estimate its IGM density.
description: 15 pages, 12 figures
Towards Traffic Bisimulation of Linear Periodic Event-Triggered Controllers
Creators: name: Gleizer, Gabriel de A.
name: Mazo, Manuel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: We provide a method to construct finite abstractions exactly bisimilar to linear systems under a modified periodic event-triggered control (PETC), when considering as output the inter-event times they generate. Assuming that the initial state lies on a known compact set, these finite-state models can exactly predict all sequences of sampling times until a specified Lyapunov sublevel set is reached. Based on these results, we provide a way to build tight models simulating the traffic of conventional PETC. These models allow computing tight bounds of the PETC average frequency and global exponential stability (GES) decay rate. Our results are demonstrated through a numerical case study.
description: Accepted at IEEE Control Systems Letters
Characteristics of trees infested by Douglas-fir beetles in Kootenay Lake Forest District
Creators: name: Kano, Tamaki
Publisher: name: University of British Columbia
Year: 2010

description: Some characteristics of Douglas-fir trees and their immediate surroundings were assessed for their association with Douglas-fir beetle infestation in Kootenay Lake Forest District. Examination of trees in plots paired within 50 m revealed that a small crown and clumping of Douglas-fir trees were related to infestation for trees larger than 40 cm diameter at breast height (1.3 m). Relative probability of infestation between trees in plots within 50 meters can be calculated using live crown ratio and basal area occupied by Douglas-fir trees in a 0.01-ha range. Live crown ratio and average diameter of trees within a 0.01-ha plot around the tree were important. Carbon isotope ratio of wood samples from a 5-year period prior to infestation was significantly related to infestation status, possibly indicating moisture stress in infested trees previous to infestation.
Ceny nawozów mineralnych w krajach Europy Środkowej w latach 2007-2013
Creators: name: Zalewski, Arkadiusz
name: Zalewski, Arkadiusz
Publisher: name: Unknown
Year: 2014
Subjects: subject: Agribusiness
subject: International Relations/Trade
subject: Production Economics
subject: mineral fertilizers
subject: prices
subject: Central Europe
subject: / nawozy mineralne
subject: ceny
subject: Europa Środkowa

description: In 2007-2013, clearly increased mineral fertilizer rates in the countries of Central Europe, which resulted largely from the conditions of the world market. The article analyzed the changes prices of selected mineral fertilizers in Poland, Czech Republic, Hungary and Slovakia, and interdependencies as well as the relative prices of fertilizers to wheat prices. The study showed that price changes in the period took place in the countries surveyed similarly, but the highest price increases, as well as the highest level of prices in the last years of the period reported on the Polish market. Trends in the price ratios of mineral fertilizers for wheat prices in the analyzed countries was similar. For the purchase of the same amount of fertilizer greatest equivalent from the sale of wheat, however, have to allocate farmers from Slovakia. / Synopsis. W latach 2007-2013 wyraźnie wzrosły ceny nawozów mineralnych w krajach Europy Środkowej, co wynikało w dużym stopniu z uwarunkowań światowego rynku. W artykule analizowano zmiany cen wybranych nawozów mineralnych w Polsce, Czechach, na Węgrzech i Słowacji oraz wzajemne zależności, a także relacje cen nawozów do cen pszenicy. Przeprowadzone badania wykazały że zmiany cen w analizowanym okresie przebiegały w badanych krajach podobnie, jednak najwyższe wzrosty cen, jak również najwyższy poziom cen w ostatnich latach badanego okresu odnotowano na rynku polskim. Tendencje relacji cen nawozów mineralnych do cen pszenicy w analizowanych krajach przebiegały podobnie. Na zakup tej samej ilości nawozów największą równowartość ze sprzedaży pszenicy musieli jednak przeznaczyć rolnicy ze Słowacji.
Mass accumulation efficiency in helium shell flashes for various white dwarf masses
Creators: name: Kato, Mariko
name: Hachisu, Izumi
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have calculated the mass accumulation efficiency during helium shell flashes on white dwarfs (WDs) of mass 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, and $1.35 M_{\odot}$ for the helium accretion rates $\log\dot M_{\rm He} \ (M_{\odot}$ yr$^{-1}) = -7.4$ to -5.8. This efficiency is a crucial factor for binary evolutions of Type Ia supernovae. For less massive WDs ($< 0.8 \ M_{\odot}$) no wind mass loss occurs and all the accreted mass accumulates on the WD if the Roche lobe size is large enough. The efficiency takes the minimum values in between 1.1 and 1.2 $M_{\odot}$ WD for a given mass accretion rate and increases in both less and more massive WDs. The mass accumulation efficiency is larger than 0.5 for $\log\dot M_{\rm He} \geq -6.72$ in all the WD masses.
description: 7 pages include 2 figures; ApJ, in press
About the Serpinsky-Knopp curve
Creators: name: Shchepin, Evgeny
Publisher: name: arXiv
Year: 2020
Subjects: subject: Metric Geometry (math.MG)
subject: Computational Geometry (cs.CG)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 51F99

description: The Serpinsky-Knopp curve is characterized as the only curve (up to isometry) that maps a unit segment onto a triangle of a unit area, so for any pair of points in the segment, the square of the distance between their images does not exceed four times the distance between them.
description: An abridged version of this article is accepted for publication in Russian Mathematical Surveys
Społeczny charakter drobnych gospodarstw rolnych
Creators: name: Żmija, Janusz
name: Czekaj, Marta
name: Żmija, Janusz
name: Czekaj, Marta
Publisher: name: Unknown
Year: 2014
Subjects: subject: Agribusiness
subject: Agricultural and Food Policy
subject: Community/Rural/Urban Development
subject: small agriculture holdings
subject: social meaning
subject: / drobne gospodarstwa rolne
subject: znaczenie społeczne

description: The paper discusses the question of social meaning of small agriculture holdings. The main purpose of the paper was to present basic social roles of small agriculture holdings. Particular attention has been focused on the fact that the society requires the functioning of these entities by reporting demand for goods and services that can be met only by small agricultural holdings. The study focuses attention on such issues as protection against poverty in rural areas, care of members of farmers family and cultural dimension of the functioning of small farms (for example: maintaining the unique rural landscapes). / Synopsis. W opracowaniu poruszony został problem społecznych funkcji drobnych gospodarstw rolnych. Głównym celem artykułu było wskazanie podstawowych zadań o charakterze społecznym pełnionych przez drobne gospodarstwa rolne, przy czym szczególną uwagę skupiono na fakcie, iż to społeczeństwo wpływa na podtrzymywanie funkcjonowania tych podmiotów poprzez zgłaszanie zapotrzebowania na dobra i usługi, które mogą być zaspokajane tylko przez drobne gospodarstwa rolne. W opracowaniu poruszono takie problemy jak: ochrona przed ubóstwem na wsi, opieka nad członkami rodzin rolniczych oraz kulturowo-krajobrazowy wymiar funkcjonowania drobnych gospodarstw rolnych.
Detection of anti-correlated hard X-ray time lag in Cygnus X-3
Creators: name: Choudhury, Manojendu
name: Rao, A. R.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The wide-band X-ray spectra of the high mass X-ray binary Cygnus X-3 exhibits a pivoting behavior in the `low' (as well as `hard') state, correlated to the radio emission. The time scale of the soft and hard X-rays' anti-correlation, which gave rise to the pivoting feature, was found to be less than a day from the monitoring observations by RXTE--ASM and CGRO--BATSE. In this Letter we report the detection of a lag of $\lesssim$ 1000s in the anti-correlation of the hard X-ray emission (20--50 keV) to that of the soft X-ray emission (2--7 keV), which may be attributed to the viscous time scale of flow of matter in the accretion disk. This suggests the geometrical picture of a truncated accretion disc with a Compton cloud inside the disc, the relative sizes of which determine the spectral shape. Any change in the disc structure will take place in a viscous time scale, with corresponding anti-correlated change in the Compton cloud. We also report the pivoting in the spectra in one span of a pointed observation when an episode of the rearranging of the accretion system is serendipitously observed. This is the first such observation of hard X-ray delay seen in the persistent Galactic microquasars, within the precincts of the hard state.
description: Accepted in The Astrophysical Journal (Letters): in press
An early warning system for electromagnetic follow-up of gravitational-wave events
Creators: name: Sachdev, Surabhi
name: Magee, Ryan
name: Hanna, Chad
name: Cannon, Kipp
name: Singer, Leo
name: SK, Javed Rana
name: Mukherjee, Debnandini
name: Caudill, Sarah
name: Chan, Chiwai
name: Creighton, Jolien D. E.
name: Ewing, Becca
name: Fong, Heather
name: Godwin, Patrick
name: Huxford, Rachael
name: Kapadia, Shasvath
name: Li, Alvin K. Y.
name: Lo, Rico Ka Lok
name: Meacher, Duncan
name: Messick, Cody
name: Mohite, Siddharth R.
name: Nishizawa, Atsushi
name: Ohta, Hiroaki
name: Pace, Alexander
name: Reza, Amit
name: Sathyaprakash, B. S.
name: Shikauchi, Minori
name: Singh, Divya
name: Tsukada, Leo
name: Tsuna, Daichi
name: Tsutsui, Takuya
name: Ueno, Koh
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Binary neutron stars (BNSs) will spend $\simeq 10$ -- 15 minutes in the band of Advanced LIGO and Virgo detectors at design sensitivity. Matched-filtering of gravitational-wave (GW) data could in principle accumulate enough signal-to-noise ratio (SNR) to identify a forthcoming event tens of seconds before the companions collide and merge. Here we report on the design and testing of an early warning gravitational-wave detection pipeline. Early warning alerts can be produced for sources that are at low enough redshift so that a large enough SNR accumulates $\sim 10 - 60\,\rm s$ before merger. We find that about 7% (respectively, 49%) of the total detectable BNS mergers will be detected $60\, \rm s$ ($10\, \rm s$) before the merger. About 2% of the total detectable BNS mergers will be detected before merger and localized to within $100\, \rm \text{deg}^2$ (90% credible interval). Coordinated observing by several wide-field telescopes could capture the event seconds before or after the merger. LIGO-Virgo detectors at design sensitivity could facilitate observing at least one event at the onset of merger.
description: small update in numbers caused by using a more updated local BNS rate estimate
The documentational approach to didactics
Creators: name: Trouche, Luc
name: Gueudet, Ghislaine
name: Pepin, Birgit
Publisher: name: arXiv
Year: 2020
Subjects: subject: History and Overview (math.HO)
subject: FOS: Mathematics

description: This article is an updated version of an entry of the Encyclopedia of Mathematics Education (2018). In the same time, it is the seed of the HAL collection DAD-MULTILINGUAL, constituted by the translation of this entry in various languages.The documentational approach to didactics is a theory in mathematics education. Its first aim is to understand teachers' professional development by studying their interactions with the resources they use and design in/for their teaching. In this text we briefly describe the emergence of the approach, its theoretical sources, its main concepts and the associated methodology. We illustrate these aspects with examples from different research projects. This synthetic presentation is written for researchers, but also for non-specialists (e.g. master students) interested in a first discovery of the documentational approach.
Random Quantum Circuits and Pseudo-Random Operators: Theory and Applications
Creators: name: Emerson, Joseph
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Pseudo-random operators consist of sets of operators that exhibit many of the important statistical features of uniformly distributed random operators. Such pseudo-random sets of operators are most useful whey they may be parameterized and generated on a quantum processor in a way that requires exponentially fewer resources than direct implementation of the uniformly random set. Efficient pseudo-random operators can overcome the exponential cost of random operators required for quantum communication tasks such as super-dense coding of quantum states and approximately secure quantum data-hiding, and enable efficient stochastic methods for noise estimation on prototype quantum processors. This paper summarizes some recently published work demonstrating a random circuit method for the implementation of pseudo-random unitary operators on a quantum processor [Emerson et al., Science 302:2098 (Dec.~19, 2003)], and further elaborates the theory and applications of pseudo-random states and operators.
description: This paper is a synopsis of Emerson et al., Science 302: 2098 (Dec 19, 2003) and some related unpublished work; it is based on a talk given at QCMC04; 4 pages, 1 figure, aipproc.sty
Extreme water wave profile recovery from pressure measurements at the seabed
Creators: name: Clamond, Didier
name: Henry, David
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The aim of this note is to examine the efficacy of a recently developed approach to the recovery of nonlinear water waves from pressure measurements at the seabed, by applying it to the celebrated extreme Stokes wave.
FIATAL GAZDÁK AZ AGRÁRSZEKTORBAN (EGY PRIMER KUTATÁS EREDMÉNYEINEK ISMERTETÉSE)
Creators: name: Köszegi, Irén Rita
name: Köszegi, Irén Rita
Publisher: name: Unknown
Year: 2014
Subjects: subject: Community/Rural/Urban Development
subject: Farm Management
subject: fiatal gazdák
subject: fenntartható mezőgazdaság
subject: Magyarország
subject: Közös Agrárpolitika 2014-2020
subject: támogatások
subject: young farmers
subject: sustainable agricultural
subject: Hungary
subject: CAP 2014-2020
subject: supports

description: Az Európai Unióra, benne Magyarországra is jellemző, hogy a mezőgazdaságban dolgozók aránya folyamatosan csökken. „Az Európa 2020: Az intelligens, fenntartható és inkluzív növekedés” stratégiájával való összhang megteremtése érdekében a Közös Agrárpolitika vidékfejlesztési pillére hat prioritásra épül a mezőgazdaságra, az erdészetre és az élelmiszer-feldolgozásra kiterjedően. A megfogalmazott célok megvalósítása mellett kiemelt szerepet kapnak a fiatal mezőgazdasági termelők, hiszen a fiatalok agráriumban betöltött szerepe nélkülözhetetlen a mezőgazdaság jövője szempontjából. A primer kutatás középpontjában a Dél-alföldi Régió fiatal gazdái állnak. A gazdák megkérdezésére a mélyinterjút alkalmaztam. Véleményem szerint a megkérdezett fiatal gazdák kiemelt feladatuknak tartják a környezet védelmét, a fenntartható mezőgazdaság megvalósulását, melyek a 2014-től érvénybe lépő új keretrendszerben a vidékfejlesztés kiemelt irányait jelentik. Célkitűzéseim között szerepelt annak a felmérése, hogy a fiatal gazdák milyen indíttatásból kezdtek el mezőgazdasági tevékenységgel foglalkozni, hogyan ítélik meg a jelenlegi támogatási lehetőségeket, miként vélekednek a fenntartható mezőgazdaságról és hogyan látják jövőbeni lehetőségeiket. ----------------------------------------------------------In the European Union and in Hungary the proportion of people employed in agriculture is continuously decreasing. In order to ensure alignment with the strategy “Europe 2020: smart, sustainable and inclusive growth”, the pillar of rural development of the Common Agricultural Policy will be based on six priorities in the fields of agriculture, forestry and food processing. Apart from achieving these goals, young agricultural producers will be taking a prominent role as the engagement of young people in the agrarian sector is indispensable for the future of the sector. In my study I examined the various reasons why young agricultural producers had started agricultural activities, and to what extent they consider it their key task to make agriculture sustainable and to protect the land and their environment.
Partitioning heterotrophic and rhizospheric soil respiration in a mature Douglas-fir forest
Creators: name: Lalonde, Rachelle Germaine
Publisher: name: University of British Columbia
Year: 2010

description: Total belowground respiration (R[sub s]) was partitioned into heterotrophic (R[sub h]) and rhizospheric (R[sub r]) respiration to determine the amount of CO₂ originating from each component. The 15-month experiment took place in a 55-year-old coastal Douglas-fir (Pseudotsuga menziesii (Mirbel) France) forest on Vancouver Island, Canada (49°51'N, 125°19'W). R[sub s] was measured within cylinders (10 cm in diameter and 7 cm long) installed 2 cm into the soil. R[sub h] was measured within longer cylinders (10 cm in diameter and 55 cm long) from which roots, hyphae, and associated rhizosphere organisms where excluded by a 0.5-micron nylon mesh. These cylinders were installed 50 cm into the soil. R[sub r] was calculated as the difference between the two measured respiration rates (R[sub s] and R[sub h]) R[sub s] was 12 Mg C ha⁻¹ yr⁻¹ and ranged from 0.71 to 6.57 g C m⁻²day⁻¹ over the 15- month experiment. R[sub h] was 7.8 Mg C ha⁻¹ yr⁻¹, which contributed 65% of R[sub s] mostly between May and August. R[sub r] was 4.2 Mg C ha⁻¹ yr⁻¹ (35% of R[sub s]) and peaked in spring and fall. Soil temperature could describe the variability in R[sub s] (p=0.0004) better than soil moisture (p=0.6156) and Q₁₀ values for R[sub s] and R[sub h] were 1.7 and 2.2, respectively. Also measured were potential sources of error associated with using this sampling technique such as: respiration resulting from decaying severed roots inside meshed cylinders, disturbance of cylinder installation, and lateral diffusion of CO₂ through the mesh.
„NEM ESIK MESSZE AZ ALMA A FÁJÁTÓL…”
Creators: name: Marosi, Ildikó
name: Marosi, Ildikó
Publisher: name: Unknown
Year: 2014
Subjects: subject: Labor and Human Capital
subject: Teaching/Communication/Extension/Profession
subject: család
subject: generációk
subject: kompetenciák
subject: szocializáció
subject: tacit és explicit tudás
subject: competences
subject: family
subject: generations
subject: socialisation
subject: tacit and explicit knowledge

description: A család, mint a társadalom alapvető egysége csupán az értékek (mint például a környezettudatosság) alapvető forrása, de jelentős szocializációs szereppel bír a fiatal felnőttkori tacit és explicit tudás tanulási folyamataiban. A tanulási folyamatokat támogató családi szerep vizsgálatára irányuló online, kvantitatív vizsgálatomat a 18-33 éves, pályakezdő, illetve felsőoktatásban tanulmányokat hallgatók körében végeztem el. Vizsgálataimmal igazoltam, hogy az Y generáció szerint általánosan, a társadalom a tacit tudást többre értékeli az explicit tudásnál, továbbá a fiatalok értékelik az idősebbek bizonyos tudását, tapasztalatát, amelyeket szívesen el is tanulnának tőlük. A családi támogatás, a szándék és a tartalom alapján a családon belüli, fiatal felnőttkori szocializáció (tacit tudás megosztása, tanulása) hozzájárul – többek között a munkaerő-piacon is elvárt – kompetenciák fejlesztéséhez.--------------------------------------------------------------The family as a fundamental unit of society is not only the primary source of values (such as environmental firendliness), but has a significant role in the socialisation of young adults, namely, in the process in which they acquire both tacit and explicit knowledge. The present paper is based on the review of relevant literature and a body of online quantitative research conducted among university students as well as new entrants to the labour market, aged 18-33. The research has been aimed at examining the role of the family in the learning process. The findings show first that Generation Y views society as appreciating tacit knowledge more than explicit knowledge. And second, it turns out that young persons value certain types of knowledge and experience of the elderly, which they would like to learn from them. Owing to family support, individual intent as well as content, adulthood socialisation (sharing and learning tacit knowledge) contributes to mastering competences, even to those expected in the labour market.
Breakdown of Lindstedt Expansion for Chaotic Maps
Creators: name: Gentile, Guido
name: van Erp, Titus S.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: In a previous paper of one of us [Europhys. Lett. 59 (2002), 330--336] the validity of Greene's method for determining the critical constant of the standard map (SM) was questioned on the basis of some numerical findings. Here we come back to that analysis and we provide an interpretation of the numerical results by showing that no contradiction is found with respect to Greene's method. We show that the previous results based on the expansion in Lindstedt series do correspond to the transition value but for a different map: the semi-standard map (SSM). Moreover, we study the expansion obtained from the SM and SSM by suppressing the small divisors. The first case turns out to be related to Kepler's equation after a proper transformation of variables. In both cases we give an analytical solution for the radius of convergence, that represents the singularity in the complex plane closest to the origin. Also here, the radius of convergence of the SM's analogue turns out to be lower than the one of the SSM. However, despite the absence of small denominators these two radii are lower than the ones of the true maps for golden mean winding numbers. Finally, the analyticity domain and, in particular, the critical constant for the two maps without small divisors are studied analytically and numerically. The analyticity domain appears to be an perfect circle for the SSM analogue, while it is stretched along the real axis for the SM analogue yielding a critical constant that is larger than its radius of convergence.
description: 12 pages, 3 figures
Kemikália-csökkentés és a fenntarthatóság összefüggése – választható gazdálkodási stratégiák
Creators: name: Takacsne Gyorgy, Katalin
name: Kis, Sandor
name: Takacsne Gyorgy, Katalin
name: Kis, Sandor
Publisher: name: Unknown
Year: 2007
Subjects: subject: Community/Rural/Urban Development
subject: Crop Production/Industries
subject: Farm Management
subject: Land Economics/Use
subject: kemikália-használat
subject: fenntartható gazdálkodás
subject: stratégiák
subject: chemical usage
subject: sustainable farming
subject: strategies

description: A tanulmányban áttekintettük a magyarországi kemikália felhasználás (műtrágya, növényvédő szer) alakulását a növénytermelésben, értékeltük a fenntartható mezőgazdaság lehetőségeit a környezetterhelés szempontjából. Megállapítottuk, hogy az ágazat kemikália felhasználása mára jelentősen csökkent az 1980-as években mért szintről, részben finanszírozási okokra, a növényvédő szereknél technológiai fejlődésre visszavezethetően, és csak kisebb részben környezetvédelmi szempontok miatt. A környezetterhelés csökkentésének és a fenntarthatóság megvalósításának irányzatai között az egyik megoldás az okszerű vegyszerhasználatot jelentő precíziós gazdálkodás lehet, azonban ennek a technológiának többletterheit (beruházásigény, magasabb termelési költségek) nem minden gazdálkodó képes vállalni. A másik véglet a mesterséges vegyszerektől mentes gazdálkodás. Az ökológiai gazdálkodás a fenti folyamatokkal párhuzamosan, egyre nagyobb területeken terjedt az elmúlt évtizedben, bár a növekedése az elmúlt évek adatai alapján megtorpanni látszik, a kereslet-kínálat és a jövedelmezőség hatásaira. ------------------- In this study we surveyed the development of Hungary’s chemical usage (chemical fertiliser, plant protection remedies) in plant production and evaluated the possibilities of sustainable agriculture from the viewpoint of environmental burden. We determined that the sector’s chemical use has by now significantly decreased from the levels measured in the 1980s; partly due to financing issues, the technological development of plant protection remedies, and to a lesser degree due to environmental protection viewpoints. Among the trends to reduce the environmental burden and realise sustainability, one of the solutions may be precision farming, which means rational chemical use. However, not every farmer is capable of shouldering the additional burdens of this technology (investment requirements, higher production costs). The other extreme is artificial-chemical-free farming. Organic farming has spread to ever greater areas over the past decade, in parallel with the processes above, although based on the data of recent years its growth appears to have stalled, which is suggestive of the effects of supply and demand and profitability.
title: Navigating Paradoxes and Multiple Institutional Logics in Creative Startups
Creators: name: Koch, Florian
Publisher: name: UNSPECIFIED
Year: 2025

description: Entrepreneurs in the cultural and creative industries face the unique challenge of merging artistic vision with commercial objectives. These individuals, who manage businesses in areas such as art, design, and media, must balance creative expression with the need for financial sustainability. Thus, conflicts arise from multiple institutional logics, as creative logics emphasize exploration and experimentation, while commercial logics focus on refinement and profitability. Managing these competing demands creates organizational tensions, particularly under resource constraints, and mirrors a dilemma observable across many sectors. The cultural and creative industries thus serve as a microcosm for all hybrid organizations facing conflicting institutional logics and paradoxical tensions. Paradox theory provides a valuable framework for understanding these dynamics, showing how contradictory yet interdependent elements can coexist within organizations. By addressing both sides of the paradox simultaneously—rather than making trade-offs—organizations can harness both creative and commercial poles, fostering resilience and innovation. This dissertation investigates how creative entrepreneurs navigate these paradoxical tensions between artistic and commercial demands. Through a multi-level analysis, it examines the influence of individual orientations, team dynamics, and organizational strategies on ambidexterity as a paradoxical construct, innovation and adaptation processes. More specifically, by focusing on three levels—individual, team, and organizational—this dissertation addresses the complex interplay between paradoxical constructs such as creativity and commercialization, and exploration and exploitation, which define the challenges of hybrid ventures. The first study adopts a quantitative approach to explore how founders’ creative and business orientations interact to influence innovation, providing insights into how early decisions shape a venture’s long-term trajectory. The second study uses qualitative methods to examine interpersonal dynamics within founding teams, focusing on how social interactions foster ambidexterity, enabling teams to balance creativity with commercialization. The third study offers a longitudinal qualitative analysis of how hybrid organizations adapt their business models to reconcile the competing demands of artistic and commercial logics. Collectively, these studies examine the navigation of paradoxical tensions from these interconnected perspectives and under which conditions it results in innovation. As such, this dissertation contributes to the literature on creative entrepreneurship, hybrid organizations, and paradox theory. In particular, this dissertation highlights the importance of individual orientations and team dynamics in fostering innovative outcomes and ambidextrous capabilities while demonstrating how continuous organizational adaptation is essential for long-term success.