cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Eficiencia tecnia de la produccion de vacuno d carne en la dehesa
Creators: name: Castillo Quero, Manuela
name: Castillo Quero, Manuela
Publisher: name: Unknown
Year: 2006
Subjects: subject: Livestock Production/Industries
subject: Vacuno carne
subject: dehesa
subject: frontera de produccion
subject: eficiencia
subject: Analisis Envolvente de Datos (DEA)
subject: mecanismos de diferenciacion del producto
subject: beef production
subject: "dehesa system"
subject: technical efficiency
subject: Data Envelopment Analysis (DEA)
subject: mechanisms to differentiate production

description: El objectivo de este trabajo es estimar la eficiencia tecnica de la produccion de vacuno carne en la comarca de los Pedroches (Cordoba), donde la dehesa es el sistema extensivo caracteristico de produccion. El analisis de los factores que afectan a la eficiencia productiva permite tambien observar si las explotaciones integradas en una cooperativa para el cebo y comercializacion bajo marca de calidad existente en la zona (Covap) son mas eficientes. la metodologia utilizada consiste en la estimacion de una funcion frontera no parametrica DEA (Data Envelopment Analysis), a partir de los datos procedentes de una encuesta realizada en 2002 a 50 ganaderos de la zona. Los resultados muestran que las explotaciones que combinan de forma mas eficiente sus recursos son explotaciones mas intensivas (en carga ganadera y mecanizacion), que crian y tambien engordan los terneros, con una menor proporciond e subvenciones en los ingresos derivados del vacuno, y cuyos titulares son personas de menor edad y mayor formacion. Por otro lado, no se econtraron diferencias significativas en la eficiencia entre explotaciones de cria integradas y no integradas...The purpose of the paper is to estimate the technical efficiency in cattle farms of the region of Pedroches, in the north of the province of Cordoba where the dehesa is the normal extensive production system. The analysis of the causes of the efficiency allows us to demonstrate if the breeding farms which are integrated in a feeding and marketing co-operative which sells the meat with a quality label are more efficient. The used methodology consists of the estimation of a non parametric frontier function DEA from a survey of 50 cattle farms made in that region in 2002. The results show that the farms that arrange a more efficiency level are more intensive (livestock density and mechanization), that breed but also feed the calves, have less subsidies in their incomes, and their farmers are younger and have higher education. In other way, significant efficiency differences were not found between integrated beef farms and not integrated.
Do Goedel's incompleteness theorems set absolute limits on the ability of the brain to express and communicate mental concepts verifiably?
Creators: name: Anand, Bhupinder Singh
Publisher: name: arXiv
Year: 2004
Subjects: subject: General Mathematics (math.GM)
subject: FOS: Mathematics
subject: 03B10

description: Classical interpretations of Goedel's formal reasoning imply that the truth of some arithmetical propositions of any formal mathematical language, under any interpretation, is essentially unverifiable. However, a language of general, scientific, discourse cannot allow its mathematical propositions to be interpreted ambiguously. Such a language must, therefore, define mathematical truth verifiably. We consider a constructive interpretation of classical, Tarskian, truth, and of Goedel's reasoning, under which any formal system of Peano Arithmetic is verifiably complete. We show how some paradoxical concepts of Quantum mechanics can be expressed, and interpreted, naturally under a constructive definition of mathematical truth.
description: 73 pages; this is an updated version of the NQ essay; an HTML version is available at http://alixcomsi.com/Do_Goedel_incompleteness_theorems.htm
Cervical cancer screening during the COVID-19 Crisis_ Africa view point - ecancer.pdf
Creators: name: Kirigia, Consolata
Publisher: name: figshare
Year: 2020
Subjects: subject: 111006 Midwifery
subject: FOS: Health sciences

description: Cervical cancer screening during the COVID-19 Crisis_ Africa view point - ecancer.pdf
Ab initio k.p theory of spin-momentum locking: Application to topological surface states
Creators: name: Nechaev, I. A.
name: Krasovskii, E. E.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Based on ab initio relativistic ${\mathbf k}\cdot{\mathbf p}$ theory, we derive an effective two-band model for surface states of three-dimensional topological insulators up to seventh order in $\mathbf{k}$. It provides a comprehensive description of the surface spin structure characterized by a non-orthogonality between momentum and spin. We show that the oscillation of the non-orthogonality with the polar angle of $\mathbf{k}$ with a $π/3$ periodicity can be seen as due to effective six-fold symmetric spin-orbit magnetic fields with a quintuple and septuple winding of the field vectors per single rotation of $\mathbf{k}$. Owing to the dominant effect of the classical Rashba field, there remains a single-winding helical spin structure but with a periodic few-degree deviation from the orthogonal locking between momentum and spin.
description: 8 pages, 3 figures, 2 tables
COVID-19 in the United States: Trajectories and second surge behavior
Creators: name: James, Nick
name: Menzies, Max
Publisher: name: arXiv
Year: 2020
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Populations and Evolution (q-bio.PE)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: This paper introduces a mathematical framework for determining second surge behavior of COVID-19 cases in the United States. Within this framework, a flexible algorithmic approach selects a set of turning points for each state, computes distances between them, and determines whether each state is in (or over) a first or second surge. Then, appropriate distances between normalized time series are used to further analyze the relationships between case trajectories on a month-by-month basis. Our algorithm shows that 31 states are experiencing second surges, while 4 of the 10 largest states are still in their first surge, with case counts that have never decreased. This analysis can aid in highlighting the most and least successful state responses to COVID-19.
description: Accepted manuscript. Extra appendices and resized figures compared to v1. Equal contribution
Autocorrelations from the scale dependence of transverse-momentum fluctuations in Hijing-simulated Au-Au collisions at $\sqrt{s_{NN}} = $ 200 GeV
Creators: name: Liu, Qingjun
name: Prindle, Duncan J.
name: Trainor, Thomas A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present measurements of the scale (bin-size) dependence of event-wise mean transverse momentum $$ fluctuations for Au-Au collisions at $\sqrt{s_{NN}} = 200$ GeV simulated with the Hijing-1.37 Monte Carlo. We invert those scale distributions to obtain autocorrelation distributions on pseudorapidity $η$ and azimuth $ϕ$ difference variables $(η_Δ,ϕ_Δ)$. The autocorrelations have a simple structure dominated by a same-side (on azimuth) peak with similar widths on the two difference variables. With jet quenching imposed, the same-side peak widths increase slightly in both directions, and the amplitude is substantially reduced. The same-side peaks are attributed to minijets, observed in this study as local {\em velocity} correlations of charged particles with $p_t < $ 2 GeV/c.
description: 11 pages, 4 figures
An efficient approach to evaluate seismic performance and reliability of wood shear walls
Creators: name: Gu, Jianzhong
Publisher: name: University of British Columbia
Year: 2010

description: Performance-based engineering and design aim to achieve multiple performance levels under different hazard levels. There is a need to define and quantify structural performance in a reliability based format for managing risk and uncertainty. The tedious process of nonlinear dynamic analysis of shear walls requires an efficient tool to predict the drift with acceptable accuracy. A simplified mechanics-based analog model was developed for such purpose. The similarities of the load-displacement curves of individual nail connectors and shear walls indicate it may be possible to represent the shear wall behaviour with a large pseudo nail. To develop a pseudo nail model, a nonlinear optimization problem which minimizes the error of prediction is involved. Five search methods were implemented in solving the optimization problem: hill climbing, random search, genetic algorithm, simplex and artificial neural network. The input of the model is the load-displacement relationship of the structure subject to a half cyclic static load with the decreasing curve after peak load. Results from laboratory tests and validated models of two types of regular panel shear walls were used to verify the accuracy of this model. Good agreement was obtained. The uncertainty of structural performance is attributed to many sources of randomness. The combined effect of earthquake intensity and ground motion records, were considered in this thesis where wall drifts were considered as the performance measure. The drift demand distribution of a structure was formulated and a popular format of reliability procedure was discussed. A new reliability procedure based on conditional distribution at given earthquake records was established. Another procedure, the Monte Carlo method considering weighted ranking, was proposed to improve the efficiency of simulation when intensity measure is arbitrarily sampled. The construction of confidence curves is also presented for the analysis of structural performance. Both the pseudo nail model and the reliability procedures were implemented to calculate the reliability indices of eight types of Japanese walls. The results can be used for engineering practice and to guide the modification of building code.
KELET-NYUGAT ÁTRENDEZŐDÉS?
Creators: name: Tóth, Gergely
name: Tóth, Gergely
Publisher: name: Unknown
Year: 2014
Subjects: subject: Political Economy
subject: Resource /Energy Economics and Policy
subject: Fenntartható fejlődés
subject: morálökonómia
subject: lokalizáció
subject: ökológiai lábnyom
subject: bionómia
subject: Sustainable development
subject: moral economics
subject: localization
subject: ecological footprint
subject: bionomy

description: Az emberiség több évezredes története háborúk, egyéni érdekek összecsapásának története. Mégis, mintha az utóbbi évtizedekben a harc a nyílt konfliktusról áthelyeződött volna gazdasági versengés területére. A megtelt Földön immár ez sem lehetséges, meg kell tanulnunk a gazdasági együttműködés, alapelveit, át kell állnunk a még több gazdaságából az elég gazdaságába. A cikkben ennek három lényeges elemét tárgyaljuk, a pénzgravitáció megszűntetését, a haszonökonómiából a morálökonómiába való átmenetet, végül a globalizációs tendenciák felváltását lokalizációval.---------------------------------------------------------------The thousands years long history of mankind is the history of wars and the clash of individual interests. Nevertheless, the emphasis seems to be shifted from open conflict to economic competition. Even this is not possible any more on the full Earth, we have to learn the principles of economic cooperation. A transition from the economy of even more to the economy of enough is utmost necessary. Three major conditions of this transition is discussed on this article, ceasing money-gravity, shift from utilitarian to moral economics and the change of the trend of strengthening globalization to localization.
ACEs and Virtual Sharks: How do Adverse Childhood Experiences Affect Emotional Arousal Under Stress?
Creators: name: Flynn, Nicholas
Publisher: name: figshare
Year: 2020
Subjects: subject: 170199 Psychology not elsewhere classified
subject: FOS: Psychology

description: Adverse childhood experiences (ACEs) have been linked to a variety of negative life outcomes, with the formation of a maladaptive stress response system as a result of the buildup of toxic stress being described as part of the biological process underpinning this. The results of cortisol research are conflicting as to whether ACEs lead to an increase or decrease in stress response in adult life, as well as whether an additive (linear) or threshold (non-linear) model is appropriate. This study used the stimulus of a virtual reality shark dive in the first experiment to explore whether galvanic skin response (GSR) is impacted by ACE score. Results showed significant differences in GSR between low ACE scorers (0-3 ACEs) and high ACE scorers (4-10 ACEs), with high ACE scorers having a 48% increase in non-specific skin conductance responses (NS-SCR). These results support the existence of a threshold model between ACE score and GSR that occurs at four ACEs, with a non-linear relationship found between ACE score and outcome measures. It is suggested that the maladaptive stress response caused by ACEs operates through the build-up of toxic stress, eventually reaching the point when a neurological threshold is crossed, resulting in a sensitized stress response and the proliferation of stress reactions to non-threatening stimuli.
Effective field theory for non-relativistic hydrodynamics
Creators: name: Jain, Akash
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Mathematical Physics (math-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We write down a Schwinger-Keldysh effective field theory for non-relativistic (Galilean) hydrodynamics. We use the null background construction to covariantly couple Galilean field theories to a set of background sources. In this language, Galilean hydrodynamics gets recast as relativistic hydrodynamics formulated on a one-dimension higher spacetime admitting a null Killing vector. This allows us to import the existing field-theoretic techniques for relativistic hydrodynamics into the Galilean setting, with minor modifications to include the additional background vector field. We use this formulation to work out an interacting field theory describing stochastic fluctuations of energy, momentum, and density modes around thermal equilibrium. We also present a translation of our results to the more conventional Newton-Cartan language and discuss how the same can be derived via a non-relativistic limit of the effective field theory for relativistic hydrodynamics.
description: 60+1 pages, 1 figure, 2 tables; v2: added missing references, fixed minor typos
Supplementary Methods and Results from Considering discrepancy when calibrating a mechanistic electrophysiology model
Creators: name: Lei, Chon Lok
name: Sanmitra Ghosh
name: Whittaker, Dominic G.
name: Aboelkassem, Yasser
name: Beattie, Kylie A.
name: Cantwell, Chris D.
name: Delhaas, Tammo
name: Houston, Charles
name: Novaes, Gustavo Montes
name: Panfilov, Alexander V.
name: Pras Pathmanathan
name: Riabiz, Marina
name: Santos, Rodrigo Weber Dos
name: Walmsley, John
name: Worden, Keith
name: Mirams, Gary R.
name: Wilkinson, Richard D.
Publisher: name: The Royal Society
Year: 2020
Subjects: subject: Biophysics
subject: Statistics
subject: FOS: Mathematics
subject: 60699 Physiology not elsewhere classified
subject: FOS: Biological sciences
subject: Computational Biology
subject: 10299 Applied Mathematics not elsewhere classified
subject: 19999 Mathematical Sciences not elsewhere classified

description: a PDF file containing supplementary material
B-meson signatures of a Supersymmetric U(2) flavor model
Creators: name: Gopalakrishna, Shrihari
name: Yuan, C. -P.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss B-meson signatures of a Supersymmetric U(2) flavor model, with relatively light (electroweak scale masses) third generation right-handed scalars. We impose current B and K meson experimental constraints on such a theory, and obtain expectations for B->X_s gamma, B->X_s glue, B->X_s l+ l-, B->phi K_s, B_s-B_sbar mixing, and the dilepton asymmetry in B_s. We show that such a theory is compatible with all current data, and furthermore, could reconcile the apparent deviations from Standard Model predictions that have been found in some experiments.
description: 37 pages, 21 figures, RevTeX4; v.2 - minor modifications to improve readability. Published version
title: Characterizing influences of specific miRNAs on phenotypic properties of mammalian cells
Creators: name: Leberbauer, Lena Anna
Publisher: name: TU Wien
Year: 2017
Subjects: subject: miRNAs
subject: mammalian cells
subject: metabolic phenotyping
subject: MFA
subject: GFP
subject: media development

description: MicroRNAs (miRNAs) are short, non-coding, hairpin shaped RNAs, that exhibit many functions within dierent cells. Their main function is to interfere with the post-transcriptional step of protein expression, called RNA interference. Development of diseases have been linked to the malfunction of these small molecules. As the requirement of recombinant therapeutic proteins rises continuously, every direction to increase production qualities and titers of active agents is pursued. Lately, miRNAs have also been investigated for this matter, as their abundance within cells across all species is well known and this could hold the key to new engineering procedures to enhance cellular productivity. Their potential to modulate complete biochemical pathways without burdening the metabolism could mean a highly advanced approach to modify complicated biochemical system of mammalian cells. This research aimed to investigate new ways to visualize eects of miRNAs on cell characteristics, by transiently transfecting HEK 293T cells with preselected miRNAs, and analyze the outcome using ow cytometry. Evaluation on the increase of protein expression, described promising trends in several specic miRNAs, pointing out that this line of research holds a reassuring future. An investigation into the possible involvement of specic miRNAs, stably cloned into the genome of Chinese hamster ovary cells, in cell metabolism was conducted, using metabolic ux analysis (MFA). This gave an opportunity to explore their eects on a complex mammalian biochemical network. Metabolic ux analysis, media development experiments and process parameter analysis of CHO cells with altered miRNA expression patterns did show signicant dierences in central metabolism. Especially extracellular measurable uxes, like glucose and glutamine consumption, and glutamate and glutamine production decreased in anti-apoptotic cells, suggesting a more ecient handling of resources. Transient transfection of existing cell lines, parental, negative control and anti-miRNA cell line, with plasmids, carrying the sequences of complex glycoproteins, EPO and HubChe, facilitated the comparison of protein expression levels across cell clones. The production level of these proteins increased signicantly in the anti-apoptosis cell line.
On flexibility of agri-businesses: Are small- or large-scale farms more flexible?
Creators: name: Glauben, Thomas
name: Renner, Swetlana
name: Hockmann, Heinrich
name: Glauben, Thomas
name: Renner, Swetlana
name: Hockmann, Heinrich
Publisher: name: Unknown
Year: 2014
Subjects: Agribusiness
Farm Management

description: Enterprise flexibility, against the background of ever-faster changing environs, is deemed to be as a critical prerequisite for staying successful in business. Flexibility may be termed in an economic sense as the capability to adjust production schemes to a new situation without significant additional costs. Newlydeveloped methods for flexibility measurement and a comprehensive dataset were used to determine the scope and determinants of flexibility in Polish farm operations. It appears that flexibility of production technology is interrelated to farm specialization: Mixed enterprises are using more flexible technologies than dairy and granivore farms, which in turn are able to react more flexibly than crop production farms. Findings also indicate that small-scale farms have more flexible production systems than large-scale enterprises. This is true to say of all farm types. Small farms are apparently capable of changing their production schemes at lower additional costs and better adjusting themselves to changed market conditions. This may serve to explain the persistence of small-scale or dual agricultural structures in several transition countries, such as Poland.
Coherence in scale-free networks of chaotic maps
Creators: name: Lind, Pedro G.
name: Gallas, Jason A. C.
name: Herrmann, Hans J.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We study fully synchronized states in scale-free networks of chaotic logistic maps as a function of both dynamical and topological parameters. Three different network topologies are considered: (i) random scale-free topology, (ii) deterministic pseudo-fractal scale-free network, and (iii) Apollonian network. For the random scale-free topology we find a coupling strength threshold beyond which full synchronization is attained. This threshold scales as $k^{-μ}$, where $k$ is the outgoing connectivity and $μ$ depends on the local nonlinearity. For deterministic scale-free networks coherence is observed only when the coupling strength is proportional to the neighbor connectivity. We show that the transition to coherence is of first-order and study the role of the most connected nodes in the collective dynamics of oscillators in scale-free networks.
description: 9 pages, 8 figures
Electron spin resonance and ferromagnetic resonance spectroscopy in the high-field phase of the van der Waals magnet CrCl$_3$
Creators: name: Zeisner, J.
name: Mehlawat, K.
name: Alfonsov, A.
name: Roslova, M.
name: Doert, T.
name: Isaeva, A.
name: Büchner, B.
name: Kataev, V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report a comprehensive high-field/high-frequency electron spin resonance (ESR) study on single crystals of the van der Waals magnet CrCl$_3$. This material, although being known for quite a while, has received recent significant attention in a context of the use of van der Waals magnets in novel spintronic devices. Temperature-dependent measurements of the resonance fields were performed between 4 and 175 K and with the external magnetic field applied parallel and perpendicular to the honeycomb planes of the crystal structure. These investigations reveal that the resonance line shifts from the paramagnetic resonance position already at temperatures well above the transition into a magnetically ordered state. Thereby the existence of ferromagnetic short-range correlations above the transition is established and the intrinsically two-dimensional nature of the magnetism in the title compound is proven. To study details of the magnetic anisotropies in the field-induced effectively ferromagnetic state at low temperatures, frequency-dependent ferromagnetic resonance (FMR) measurements were conducted at 4 K. The observed anisotropy between the two magnetic-field orientations is analyzed by means of numerical simulations based on a phenomenological theory of FMR. These simulations are in excellent agreement with measured data if the shape anisotropy of the studied crystal is taken into account, while the magnetocrystalline anisotropy is found to be negligible in CrCl$_3$. The absence of a significant intrinsic anisotropy thus renders this material as a practically ideal isotropic Heisenberg magnet.
description: 9 pages, 5 figures, accepted in Physical Review Materials
On decomposable and reducible integer matrices
Creators: name: Marijuán, Carlos
name: Ojeda, Ignacio
name: Vigneron-Tenorio, Alberto
Publisher: name: arXiv
Year: 2020
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 15B36 (Primary), 05C40, 05C50 (Secondary)

description: We propose necessary and sufficient conditions for an integer matrix to be decomposable in terms of its Hermite normal form. Specifically, to each integer matrix of maximal row rank without columns of zeros, we associate a symmetric whole matrix whose reducibility can be determined by elementary Linear Algebra, and which completely determines the decomposibility of the first one.
Zur Flexibilität landwirtschaftlicher Unternehmen: Sind die Kleinen oder die Großen flexibler?
Creators: name: Glauben, Thomas
name: Renner, Swetlana
name: Hockmann, Heinrich
name: Glauben, Thomas
name: Renner, Swetlana
name: Hockmann, Heinrich
Publisher: name: Unknown
Year: 2014
Subjects: Agribusiness
Farm Management

description: Flexibilität von Unternehmen wird vor dem Hintergrund einer sich immer schneller wandelnden Umwelt als eine wichtige Voraussetzung für ein erfolgreiches Bestehen am Markt betrachtet. Flexibilität kann im ökonomischen Sinne als Fähigkeit Produktionspläne ohne erhebliche Zusatzkosten an eine neue Situation anzupassen bezeichnet werden. Anhand neu entwickelter Methoden der Flexibilitätsmessung und eines umfangreichen Datensatzes wurden Ausmaß und Bestimmungsfaktoren der Flexibilität von polnischen Landwirtschaftsbetrieben ermittelt. Es zeigt sich, dass die Flexibilität der Produktionstechnologie mit der Betriebsausrichtung zusammenhängt: Gemischtbetriebe nutzen flexiblere Technologien als Milchvieh- und Veredlungsbetriebe, die wiederum flexibler reagieren können als Pflanzenbaubetriebe. Ferner zeigt sich, dass kleine Betriebe über flexiblere Produktionssysteme verfügen als große Betriebe. Dies gilt für alle Betriebstypen. Kleine Betriebe können offensichtlich ihre Produktionspläne zu geringeren Zusatzkosten umstellen und sich besser an veränderte Marktbedingungen anpassen. Dies mag zur Erklärung der Persistenz kleinbetrieblicher oder auch dualer Agrarstrukturen in einigen Transformationsländern, wie auch in Polen, beitragen.
The Blanco DECam Bulge Survey. I. The Survey Description and Early Results
Creators: name: Rich, R. Michael
name: Johnson, Christian I.
name: Young, Michael
name: Simion, Iulia
name: Clarkson, William
name: Pilachowski, Catherine
name: Michael, Scott
name: Kunder, Andrea
name: Vivas, A Katherine
name: Koch, Andreas
name: Marchetti, Tommaso
name: Ibata, Rodrigo
name: Martin, Nicolas
name: Robin, Annie C.
name: Lagarde, Nadege
name: Collins, Michelle
name: Ivezic, Zeljko
name: de Propris, Roberto
name: Shen, Juntai
name: Gerhard, Ortwin
name: Soto, Mario
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The Blanco Dark Energy Camera (DECam) Bulge survey is a Vera Rubin Observatory (LSST) pathfinder imaging survey, spanning $\sim 200$ sq. deg. of the Southern Galactic bulge, $-2^\circ
description: 19 pages, 13 figures; MNRAS in press; revision corrects some errors and omissions
Follow-up imaging observations of comet 2I/Borisov
Creators: name: Mugrauer, M.
name: Bischoff, R.
name: Stenglein, W.
name: Trautmann, J.
name: Baghdasaryan, B.
name: Schlagenhauf, S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Follow-up imaging observations of the first detected interstellar comet 2I/Borisov are presented, which were carried out with the Schmidt-Teleskop-Kamera at the University Observatory Jena in 11 observing epochs in October and November 2019. The orbital solution of the comet, derived from the obtained astrometric measurements, confirms its highly eccentric ($e=3.3570 \pm 0.0006$) and inclined ($i=44.0524 \pm 0.0004\,^\circ$) orbit, that proves the interstellar origin of the comet. According to our best-fitting orbital solution, comet 2I/Borisov reaches its perihelion on 2019 Dec 8 ($q=2.0066$ au) and its closest encounter with Earth on 2019 Dec 28 ($Δ_{\text{min}}=1.9368$ au). The distance corrected brightness of the nucleus of the comet clearly exhibits a linear correlation with its phase angle. The slope of this correlation indicates the activity of the comet, which is also detected in deep imaging data, taken in 5 observing epochs, showing the coma and the tail of the comet. During our observing campaign the coma of comet 2I/Borisov exhibits on average a diameter of $(4.57\pm0.38) \cdot 10^4$ km, and the length of the tail of the comet measures $(1.52\pm0.12) \cdot 10^5$ km, assuming an anti-solar orientation.
description: 14 pages, 4 figures, 8 tables, accepted for publication in AN
Autocorrelations from fluctuation scale dependence by inversion
Creators: name: Trainor, T. A.
name: Porter, R. J.
name: Prindle, D. J.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Fluctuations in nuclear collisions can be measured as a function of momentum-space binning scale over a scale interval bounded by detector two-track resolution and acceptance. Fluctuation scale dependence is related to two-particle correlations by a Fredholm integral equation. That equation can be inverted by standard numerical methods to yield an autocorrelation distribution on difference variables as a projection of the full two-particle distribution which retains most of the correlation information in a more compact form. Autocorrelation distributions are typically more easily interpreted in terms of physical mechanisms than fluctuation measurements.
description: 10 pages, 5 figures
title: A systematic evaluation of barrier free adaptations in historic buildings - the case of the main building at the TU Wien
Creators: name: Dominguez, Maria Teresa
Publisher: name: TU Wien
Year: 2017
Subjects: subject: Barrier free
subject: building adaptations
subject: heritage buildings
subject: accessibility for all

description: Individual access to the built environment is fundamental to the guarantee of equal opportunity for all. In this regard, barrier free provisions in buildings of historical significance play a major role. Specific adaptations may be necessary to ensure the usability of the structure for all variables in user needs, as well as sustainability for future generations. Such interventions are constrained by the building¿s existing structural conditions, spatial organization and preservation requirements. The present research aims to demonstrate how to provide for accessibility needs in an historic building, while balancing preservation and intervention requirements. The investigation follows a systematic assessment of building samples from the main premises of the TU Wien (TUW), a structure with over 200 years of history. The author has developed a qualitative model to measure compliance with Austrian barrier free standards and regulations of different architectonic elements granting vertical and horizontal access. Based on the assessment results, the author proposes several alternatives to the integration of accessibility provisions into the case study. The appraisal has unveiled good practices and challenges in achieving barrier free adaptations, demonstrating that solutions do not necessarily mean invasive interventions, but are rather a combination of strategic plans, managerial decisions and spatial alterations. A holistic analysis of possible solutions should follow a multidisciplinary plan involving endusers, designers, building managers and budget allocators.
Pozycja krajów najsłabiej rozwiniętych w światowym handlu rolnym w latach 2000-2011
Creators: name: Białowąs, Tomasz
name: Białowąs, Tomasz
Publisher: name: Unknown
Year: 2013
Subjects: subject: Agribusiness
subject: Agricultural and Food Policy
subject: Food Security and Poverty
subject: International Development
subject: agricultural trade
subject: least developed countries
subject: /handel rolny
subject: kraje najsłabiej rozwinięte

description: This paper analyses the position of LDCs in world trade in food and agricultural commodities since 2000. The main trend in the development of international trade in the period after World War II was a decline in the share of agricultural products from the least developed countries. But still for many economies with the lowest level of development agricultural trade is the basis of the profits and is an opportunity to raise standards of living. /Synopsis. Przedmiotem artykułu jest analiza pozycji krajów najsłabiej rozwiniętych w światowym handlu żywnością i surowcami rolnymi od roku 2000. Zasadniczą tendencją w rozwoju handlu międzynarodowego w okresie po II wojnie światowej był spadek udziału produktów rolnych oraz krajów najsłabiej rozwiniętych gospodarczo. Jednak ciągle dla wielu gospodarek o najniższym poziomie rozwoju handel rolny stanowi podstawę zysków z wymiany i jest szansą na podniesienie standardów życia.
Modeling growth of understory aspen and spruce in western boreal Canada
Creators: name: Astrup, Rasmus
Publisher: name: University of British Columbia
Year: 2010

description: For aspen and spruce in western sub-boreal and boreal Canada this study investigated regional variation in: (1) species-specific crown openness for mature trees, and (2) light-growth relationships for juvenile trees. Regional variation in species-specific crown openness was found for both species, but the magnitude of the variation was judged to only cause small variation in understory light levels. Regional variation in the light-growth relationship was found for both species but no indications of shifts in the successional dynamics between the two species were observed. The regional variation in the two investigated quantities did not follow the same regional pattern and their combined effect cannot be expected to strengthen regional differences in understory tree performance. The regional shapes of the light-growth relationship were similar for the two species. The main observed difference between the two species was the initial fast growth of aspen. For spruce in aspen-dominated areas of the boreal mixedwood region, asymptotic light growth relationships were found. In western conifer-dominated regions, approximately linear light-growth relationships were observed. This regional variation was best explained by the different effect of aspen-dominated and conifer-dominated canopies on the light-growth relationship. It is hypothesized that the different effects of canopy-type can be caused by several effects, including nutrient availability, soil temperature, and leaf-off period. The findings of this study were incorporated in the stand level simulation model SORTIE-ND. An evaluation of SORTIE-ND illustrated that the model generally produces realistic predictions and can be considered as a management tool. A comparison of model predictions with permanent plot data for mixed stands in the Sub-Boreal Spruce Zone of British Columbia indicated that the model has problems with prediction of aspen mortality rates and tends to overestimate growth rates especially for spruce.
Podmioty gospodarcze wytwarzające energię odnawialną w województwie zachodniopomorskim
Creators: name: Błażejowska, Małgorzata
name: Błażejowska, Małgorzata
Publisher: name: Unknown
Year: 2013
Subjects: subject: Agribusiness
subject: Agricultural and Food Policy
subject: Resource /Energy Economics and Policy
subject: renewable energy sources
subject: economic activity
subject: legal forms
subject: /odnawialne źródła energii
subject: działalność gospodarcza
subject: formy prawne

description: This article analyzes the legal forms of entities with a concession for the production of electricity – for example, the Zachodniopomorskie Voivodship on the basis of the Energy Regulatory Office, the National Court Register and the Central Register and Information on Business Activity. The study contains brief characteristics, and the advantages and disadvantages of each type of activity. The voivodship is dominated by hydroelectric power plants (46%) owned by natural persons conducting business and civil companies. These operators together constitute up to 62% of the companies with concessions. However, as a result of current legislation, their development is hindered. In recent years, local or foreign capital-based wind power plants and biogas plants have mainly been established. /Synopsis. W artykule dokonano analizy prawnych form podmiotów posiadających koncesję na wytwarzanie energii elektrycznej na przykładzie woj. zachodniopomorskiego na podstawie danych Urzędu Regulacji Energetyki, Krajowego Rejestru Sądowego i Centralnej Ewidencji i Informacji o Działalności Gospodarczej. Opracowanie zawiera zwięzłą charakterystykę oraz przedstawia wady i zalety poszczególnych rodzajów działalności. W woj. zachodniopomorskim dominują elektrownie wodne (46%), których właścicielami są głównie osoby fizyczne prowadzące działalność gospodarczą i spółki cywilne. Podmioty te stanowią łącznie aż 62% przedsiębiorstw koncesjonowanych. Jednakże na skutek obecnego ustawodawstwa ich rozwój jest zahamowany. W ostatnich latach powstają głównie spółki z ograniczoną odpowiedzialnością – samorządowe lub z udziałem kapitału zagranicznego prowadzące elektrownie wiatrowe lub biogazowe.
Dynamics of Fast Rotating Neutron Stars: An Approach in the Hilbert Gauge
Creators: name: Krüger, C. J.
name: Kokkotas, K. D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We describe a set of time evolution equations and its numerical implementation for the investigation of non-axisymmetric oscillations of rapidly rotating compact objects in full General Relativity, taking into account the contribution of a dynamic spacetime. We derive the perturbation equations for the spacetime in the Hilbert gauge, while the hydrodynamical evolution is based on perturbations of the energy-momentum tensor. In our numerical implementation, we use Kreiss-Oliger dissipation in order to achieve a stable time evolution. Our code features high accuracy at comparably low computational expense and we are able to extract the frequencies of non-axisymmetric modes of compact objects with rotation rates up to the Kepler limit.
description: 26 pages, 4 figures, revised version
The Survey of Nearby Nuclei with STIS (SUNNS):Emission-Line Nuclei at Hubble Space Telescope Resolution
Creators: name: Shields, Joseph C.
name: Rix, Hans-Walter
name: Sarzi, Marc
name: Barth, Aaron J.
name: Filippenko, Alexei V.
name: Ho, Luis C.
name: McIntosh, Daniel H.
name: Rudnick, Gregory
name: Sargent, Wallace L. W.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present results from a program of optical spectroscopy for 23 nearby galaxy emission-line nuclei. This investigation takes advantage of the spatial resolution of the Hubble Space Telescope to study the structure and energetics of the central 10 - 20 pc, and the resulting data have value for quantifying central black hole masses, star formation histories, and nebular properties. This paper provides a description of the experimental design, and new findings from the study of emission lines. The sample targets span a range of nebular spectroscopic class, from HII to Seyfert nuclei. The line ratios indicative of nebular ionization show only modest variations over order-of-magnitude differences in radius, and demonstrate in a systematic way that geometrical dilution of the radiation field from a central source cannot be assumed as a primary driver of ionization structure. Comparisons between large- and small-aperture measurements for the HII/LINER transition objects provide a new test that challenges conventional wisdom concerning the composite nature of these systems. We also list a number of other quantitative results that are of interest for understanding galaxy nuclei, including (1) the spatial distribution/degree of concentration of H-alpha emission as a function of nebular type; (2) the radial variation in electron density as a function of nebular type; and (3) quantitative broad H-alpha estimates obtained at a second epoch for these low-luminosity nuclei. The resulting measurements provide a new basis for comparing the nuclei of other galaxies with that of the Milky Way. We find that the Galactic Center is representative across a wide span of properties as a low-luminosity emission-line nucleus.
description: 28 pages, 7 figures, revised version accepted by ApJ
Synchronizing the simplest classical system and then quantizing it
Creators: name: Kurzynski, Pawel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: I propose a discrete synchronization model of finite d-level systems and discuss what happens once superposition of states is allowed. The model exhibits various asymptotic behaviors that depend on the initial state. In particular, two antagonistic phenomena can occur: a quantum-to-classical transition and entanglement generation. Next, I generalize this model and show that it is possible to phase-lock a periodic dynamics of a single qubit to a periodic dynamics of a qudit stimulus.
description: 6 pages, 1 figure, comments welcome
title: Development of an advanced safety excellence system in automotive supplier industry
Creators: name: Fischer, Kurt
Publisher: name: TU Wien
Year: 2017
Subjects: subject: Safety management system
subject: people involvement
subject: company culture
subject: safety first
subject: safety house
subject: SQDC
subject: near misses
subject: training
subject: awareness
subject: visualisation
subject: commitment

description: In automotive branch producing cars or components the highest priority is mostly seen in cost factors, afterwards quality and delivery aspects are focused. Work safety is often on last spot. Why should it be a contrary priority sequence? 1. Safety 2. Quality 3. Delivery 4. Costs Only employees / operators working in safe environment within the company are able to produce good quality. Thus products can be delivered on time in required quantity and costs stay manageable. So work safety is fundamental basis for success in industry and must be handled with high priority. Safety is often seen as a topic not so prior not to say boring, most of the time it appears to be very technical and of course for experts and specialists. Bodo Marschall (Volkswagen AG) states that ¿Creating an organization with great safety not only prevents injuries! In detail he means ' Safety and health help to maintain, develop and promote capability and willingness of our employees to develop their competences in their respective areas of responsibility. This continuous improvement process contributes to our productivity'. [1] The aim of this Master's Thesis is to propose and create a cultural bridge for achieving safety excellence based on leadership decisions - coming from external COMPLIANCE motivation ending in internal COMMITMENT motivation. As a theoretical base of my investigation, I studied and analysed several safety management systems of automotive organisations. For that purpose interviews based on a checklist have been performed with top management safety representatives from OEM company (Daimler AG Stuttgart) and several first and second tier automotive suppliers (BMW Plant Steyr, ZKW Group Wieselburg, 4 Pollmann Austria GmbH Karlstein and finally Gebauer&Griller GmbH Poysdorf as the company I¿m working for). The practical part is a gap analysis in existing safety management systems comparing to the state of the art in safety excellence. The chosen way how to close existing gaps in safety excellence will be visualized in a 'safety house'. Finally, this Master's Thesis results in a recommendation instrument for any industry, but mainly automotive, how safety excellence can be integrated in existing management systems. Implementation steps are shown in a case study for Gebauer&Griller.
Wybrane uwarunkowania ekonomiczne rozwoju innowacyjnych struktur integracyjnych w agrobiznesie
Creators: name: Chorób, Roman
name: Chorób, Roman
Publisher: name: Unknown
Year: 2013
Subjects: subject: Agribusiness
subject: Agricultural and Food Policy
subject: Community/Rural/Urban Development
subject: integration processes
subject: innovation
subject: agribusiness
subject: /procesy integracyjne
subject: innowacje
subject: agrobiznes

description: The primary objective of this paper is to present theoretical foundations, principles of operation and the benefits resulting from efficiently functioning, innovative integration relationships, which are cluster structures. This study attempts to indicate the socio-economic conditions for development of these relations. A proper functioning, including emerging integration systems in a given economy serve as one of the essential conditions for its dynamic expansion. /Synopsis. W opracowaniu zaprezentowano teoretyczne podstawy, zasady funkcjonowania oraz korzyści płynące z efektywnie funkcjonujących innowacyjnych powiązań integracyjnych, jakimi są struktury klastrowe. W opracowaniu podjęto próbę wskazania społeczno-ekonomicznych uwarunkowań rozwoju tych związków. Prawidłowo funkcjonujące, jak również tworzące się struktury integracyjne występujące w gospodarce są jednym z istotnych warunków jej dynamicznej ekspansji.
Spectroscopic characterization of the known O-star population in Cygnus OB2. Evidence of multiple star-forming bursts
Creators: name: Berlanas, S. R.
name: Herrero, A.
name: Comerón, F.
name: Simón-Díaz, S.
name: Lennon, D. J.
name: Pasquali, A.
name: Apellániz, J. Maíz
name: Sota, A.
name: Pellerín, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Cygnus OB2 provides a unique insight into the high-mass stellar content in one of the largest groups of young massive stars in our Galaxy. Although several studies of its massive population have been carried out over the last decades, an extensive spectroscopic study of the whole known O-star population in the association is still lacking. In this work, we created the most complete spectroscopic census of O stars carried out so far in Cygnus OB2 using already existing and new spectroscopy. We present the spectra for 78 O-type stars, from which we identify new binary systems, obtain the distribution of rotational velocities, and determine the main stellar parameters for all the stars in the region that have not been detected as double-line spectroscopic binaries. We also derive radii, luminosities, and masses for those stars with reliable Gaia astrometry, in addition to creating the Hertzsprung-Russell Diagram to interpret the evolutionary status of the association. This work has shown the improvement reached when using accurate spectroscopic parameters and astrometry for the interpretation of the evolutionary status of a population, revealing, in the case of Cygnus OB2, at least two star-forming bursts at $\sim$3 and $\sim$5 Myr. We find an apparent deficit of very fast rotators in the distribution of rotational velocities. The inspection of the dynamical distribution of the sample has allowed us to identify nine O stars with peculiar proper motions and discuss a possible dynamical ejection scenario or past supernova explosions in the region.
description: Accepted for publication in A&A, 25 pages, 11 figures