cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Spectral disentangling of the triple system DG Leo: orbits and chemical composition
Creators: name: Fremat, Y.
name: Lampens, P.
name: Hensberge, H.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: DG Leo is a spectroscopic triple system composed by 3 stars of late-A spectral type, one of which was suggested to be a delta Scuti star. Seven nights of observations at high spectral and high time resolution at the Observatoire de Haute-Provence with the ELODIE spectrograph were used to obtain the component spectra by applying a Fourier transform spectral disentangling technique. Comparing these with synthetic spectra, the stellar fundamental parameters (effective temperature, surface gravity, projected rotation velocity and chemical composition) are derived. The inner binary consists of two Am components, at least one of which is not yet rotating synchronously at the orbital period though the orbit is a circular one. The distant third component is confirmed to be a delta Scuti star with normal chemical composition.
description: MNRAS (Accepted October 7, 2004)
Evaluation of Capital Structure of Agricultural Cooperatives
Creators: name: Steklá, Jana
name: Gryčová, M.
name: Homolka, J.
name: Steklá, Jana
name: Gryčová, M.
name: Homolka, J.
Publisher: name: Unknown
Year: 2015
Subjects: subject: Agribusiness
subject: Financial Economics
subject: Institutional and Behavioral Economics
subject: International Development
subject: Political Economy
subject: Capital structure
subject: disparity
subject: farmers′ cooperatives
subject: regions

description: One of the major factors, which affect the economic effectiveness, is suitable capital facilities of enterprises. In case of correct adjustment of capital structure, more precisely the ratio of equity capital and foreign capital, it is necessary take into account a number of factors which operate on the structure of capital, for example a variety of funding sources. The main aim of this paper is to analyze the development of the capital structure and capital disparity across the farmers' cooperatives from fourteen regions of the Czech Republic for time series 2009 – 2013. For this analysis is used the debt leverage indicators and method of comparative statics. Data are obtained and processed from the database of enterprises of Albertina. The financial and economic crisis lowered the debt to equity ratio and debt to assets ratio and the profitability ratios as well and the indicators reports V-shaped trend. The disparity of the ratio values among regions at the end of the monitored period seems not to be changed. Usually Prague as the region with the highest GDP per capita during the monitored period reports usually the extreme values in most ratios and higher deviations in debt ratios and lower deviations in profitability ratios. Also the impact of capital structure indicators on the profitability of cooperatives seems to be not significant during the monitored period.
The SKA Particle Array Prototype: The First Particle Detector at the Murchison Radio-astronomy Observatory
Creators: name: Bray, J. D.
name: Williamson, A.
name: Schelfhout, J.
name: James, C. W.
name: Spencer, R. E.
name: Chen, H.
name: Cropper, B. D.
name: Emrich, D.
name: Gould, K. M. L.
name: Haungs, A.
name: Hodder, W.
name: Howland, T.
name: Huege, T.
name: Kenney, D.
name: McPhail, A.
name: Mitchell, S.
name: Niţu, I. C.
name: Roberts, P.
name: Tawn, R.
name: Tickner, J.
name: Tingay, S. J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report on the design, deployment, and first results from a scintillation detector deployed at the Murchison Radio-astronomy Observatory (MRO). The detector is a prototype for a larger array -- the Square Kilometre Array Particle Array (SKAPA) -- planned to allow the radio-detection of cosmic rays with the Murchison Widefield Array and the low-frequency component of the Square Kilometre Array. The prototype design has been driven by stringent limits on radio emissions at the MRO, and to ensure survivability in a desert environment. Using data taken from Nov.\ 2018 to Feb.\ 2019, we characterize the detector response while accounting for the effects of temperature fluctuations, and calibrate the sensitivity of the prototype detector to through-going muons. This verifies the feasibility of cosmic ray detection at the MRO. We then estimate the required parameters of a planned array of eight such detectors to be used to trigger radio observations by the Murchison Widefield Array.
description: 17 pages, 14 figures, 3 tables
Cycles in Impulsive Goodwin's Oscillators of Arbitrary Order
Creators: name: Proskurnikov, Anton V.
name: Runvik, Håkan
name: Medvedev, Alexander
Publisher: name: arXiv
Year: 2023
Subjects: subject: Optimization and Control (math.OC)
subject: Systems and Control (eess.SY)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Existence of periodical solutions, i.e. cycles, in the Impulsive Goodwin's Oscillator (IGO) with the continuous part of an arbitrary order m is considered. The original IGO with a third-order continuous part is a hybrid model that portrays a chemical or biochemical system composed of three substances represented by their concentrations and arranged in a cascade. The first substance in the chain is introduced via an impulsive feedback where both the impulse frequency and weights are modulated by the measured output of the continuous part. It is shown that, under the standard assumptions on the IGO, a positive periodic solution with one firing of the pulse-modulated feedback in the least period also exists in models with any m >= 1. Furthermore, the uniqueness of this 1-cycle is proved for the IGO with m <= 10 whereas, for m > 10, the uniqueness can still be guaranteed under mild assumptions on the frequency modulation function.
Usability of UX Methods in Agrarian Sector - Verification
Creators: name: Šimek, Pavel
name: Vaněk, Jiří
name: Pavlík, P.
name: Šimek, Pavel
name: Vaněk, Jiří
name: Pavlík, P.
Publisher: name: Unknown
Year: 2015
Subjects: subject: Community/Rural/Urban Development
subject: Research Methods/ Statistical Methods
subject: Risk and Uncertainty
subject: UX
subject: agrarian portal
subject: testing
subject: WWW
subject: user
subject: information source

description: The article deals with experimental verification of three distinct UX web application testing methods in areas of agriculture, food industry, forestry, water management and rural development. The verification was conducted using agrarian WWW portal AGRIS. The three analyzed methods were five-second test, thirty-second test and usability test with preset scenario. The usability test yielded best results. The results of thirty-second test were satisfactory while the five-second test proved to be unsuitable for the given area.
Time series analysis in Astronomy: limits and potentialities
Creators: name: Vio, R.
name: Kristensen, N. R.
name: Madsen, H.
name: Wamsteker, W.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In this paper we consider the problem of the limits concerning the physical information that can be extracted from the analysis of one or more time series (light curves) typical of astrophysical objects. On the basis of theoretical considerations and numerical simulations, we show that with no a priori physical model there are not so many possibilities to obtain interpretable results. For this reason, the practice to develop more and more sophisticated statistical methods of time series analysis is not very productive. Only techniques of data analysis developed in a specific physical context can be expected to provide useful results. The field of {\it stochastic dynamics} appears to be an useful framework for such an approach. In particular, it is shown that modelling the experimental time series by means of the stochastic differential equations (SDE) represents a valuable tool of analysis. For example, the use of SDE permits to make the analysis of a continuous signal independent from the frequency sampling with which the experimental time series have been obtained. In this respect, an efficient approach based on the extended Kalman-filter technique is presented. Freely downloadable software is made available.
description: 6 Figures. submitted to A&A
Exponentially decaying velocity bounds of quantum walks in periodic fields
Creators: name: Abdul-Rahman, Houssam
name: Stolz, Günter
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider a class of discrete-time one-dimensional quantum walks, associated with CMV unitary matrices, in the presence of a local field. This class is parametrized by a transmission parameter $t\in[0,1]$. We show that for a certain range for $t$, the corresponding asymptotic velocity can be made arbitrarily small by introducing a periodic local field with a sufficiently large period. In particular, we prove an upper bound for the velocity of the $n$-periodic quantum walk that is decaying exponentially in the period length $n$. Hence, localization-like effects are observed even after a long number of quantum walk steps when $n$ is large.
Crop Automation System using Raspbeery Pi and IOT
Creators: name: K. Vignesh
Publisher: name: figshare
Year: 2020
Subjects: subject: 90699 Electrical and Electronic Engineering not elsewhere classified
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Agriculture plays a vital role within the development of agricultural country like India, China. That can issues the concerning agriculture are always hindering the event of the country like India. The solution of this problem is sensible agriculture by modernizing the present the traditional methods of agriculture using IoT. Hence the proposed ideas to creating the agriculture smart using automation and IoT to detect the plant leaf diseases using various mobile applications. Internet of Things (IoT) enables the various applications like crop monitoring, selection of irrigation time in crop field, irrigation decision support and also uses the fertilizer; analysis and update the data in certain report in think speak. A Raspberry Pi 3 model B is used automatic irrigation system, which is proposed to modernization and improves production of the crop in the field. The crop developed on low quantity of water consumption, so we can focus the water available for plants at the concern level to avoid the most of the farmers in their fields. The management of water should be developed, therefore the system complexity be reduced. The proposed system developed the report which sent from the sensors and estimate the water level needed for the soil to concern on the time. The two sensors are getting the info of the humidity and temperature of the soil, duration the sunshine. The systems support the values and calculate the water quantity for irrigation is required for the crop. The main advantage of the system is implementing of Precision Agriculture (PA) with a cloud computing on think speak, which optimize the water scarcity on during summer. The Raspberry-Pi 3 B model and cloud based IoT system obtain the data from crop field. The system mainly focuses on the moisture and temperature changes in the soil.
Origin of the hump anomalies in the Hall resistance loops of ultrathin SrRuO$_3$/SrIrO$_3$ multilayers
Creators: name: Yang, Lin
name: Wysocki, Lena
name: Schöpf, Jörg
name: Jin, Lei
name: Kovács, András
name: Gunkel, Felix
name: Dittmann, Regina
name: van Loosdrecht, Paul H. M.
name: Lindfors-Vrejoiu, Ionela
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The proposal that very small Néel skyrmions can form in SrRuO$_3$/SrIrO$_3$ epitaxial bilayers and that the electric field-effect can be used to manipulate these skyrmions in gated devices strongly stimulated the recent research of SrRuO$_3$ heterostructures. A strong interfacial Dzyaloshinskii-Moriya interaction, combined with the breaking of inversion symmetry, was considered as the driving force for the formation of skyrmions in SrRuO$_3$/SrIrO$_3$ bilayers. Here, we investigated nominally symmetric heterostructures in which an ultrathin ferromagnetic SrRuO$_3$ layer is sandwiched between large spin-orbit coupling SrIrO$_3$ layers, for which the conditions are not favorable for the emergence of a net interfacial Dzyaloshinskii-Moriya interaction. Previously the formation of skyrmions in the asymmetric SrRuO$_3$/SrIrO$_3$ bilayers was inferred from anomalous Hall resistance loops showing humplike features that resembled topological Hall effect contributions. Symmetric SrIrO$_3$/SrRuO$_3$/SrIrO$_3$ trilayers do not show hump anomalies in the Hall loops. However, the anomalous Hall resistance loops of symmetric multilayers, in which the trilayer is stacked several times, do exhibit the humplike structures, similar to the asymmetric SrRuO$_3$/SrIrO$_3$ bilayers. The origin of the Hall effect loop anomalies likely resides in unavoidable differences in the electronic and magnetic properties of the individual SrRuO$_3$ layers rather than in the formation of skyrmions.
A deterministic model of competitive cluster growth: glassy dynamics, metastability and pattern formation
Creators: name: Luck, J. M.
name: Mehta, Anita
Publisher: name: arXiv
Year: 2004
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We investigate a model of interacting clusters which compete for growth. For a finite assembly of coupled clusters, the largest one always wins, so that all but this one die out in a finite time. This scenario of `survival of the biggest' still holds in the mean-field limit, where the model exhibits glassy dynamics, with two well separated time scales, corresponding to individual and collective behaviour. The survival probability of a cluster eventually falls off according to the universal law $(\ln t)^{-1/2}$. Beyond mean field, the dynamics exhibits both aging and metastability, with a finite fraction of the clusters surviving forever and forming a non-trivial spatial pattern.
description: 28 pages, 8 figures
Liquid crystal nose based on chiral photonic band gap materials: principles of selective response
Creators: name: Shibaev, P. V.
name: Roslyak, O.
name: Gullatt, E.
name: Plumitallo, J.
name: Aparajita, U.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Novel liquid crystalline (LC) compositions are suggested and studied as elements of LC-nose. This allows for optical detection of several volatile organic compounds (VOCs). Ethanol, toluene, pyridine and acetic acid were detected by means of colorimetric and spectroscopic techniques during their diffusion inside chiral elements of LC-nose. Selectivity to different VOCs is enhanced by means of components of liquid crystal matrix with different viscosity, affinities to the solvents, and abilities to form hydrogen bonding.
Development of the Czech Farmers’ Age Structure and the Consequences for Subsidy Policy
Creators: name: Šimpach, Ondřej
name: Pechrová, M.
name: Šimpach, Ondřej
name: Pechrová, M.
Publisher: name: Unknown
Year: 2015
Subjects: subject: Community/Rural/Urban Development
subject: Demand and Price Analysis
subject: Farm Management
subject: Risk and Uncertainty
subject: Age-and-sex structure
subject: population projection
subject: subsidies’ policy
subject: young farmer

description: Only knowing the future development of the farmers’ age structure, it is possible to formulate the steps for its improvement and to plan young farmers’ support. The aim of the paper is (with regard to the European Union’s programme periods) to project the age-and-sex structure of agricultural workers until 2041 and to model the scenarios of subsidies supports. Cohort-component method and data from Census 2011 are used for projection of two variants of population development. The number of old agricultural workers will exceed the number of young in 2026. It will start to grow after as the second generation of children born during the 70s of the last century (under the strong pro-population policy of the communist regime and the government of President Gustav Husák) will enter the reproduction period. As an implication it will be possible (and necessary) to support more applicants. While in 2011 it there were 12.1% of young farmers (potential applicants for subsidies) supported by EUR 205.7 bil., this amount will be able to cover 18.6% in 2041.
Extremal digraphs for open neighbourhood location-domination and identifying codes
Creators: name: Foucaud, Florent
name: Ghareghani, Narges
name: Sharifani, Pouyeh
Publisher: name: arXiv
Year: 2023
Subjects: subject: Combinatorics (math.CO)
subject: Discrete Mathematics (cs.DM)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: A set $S$ of vertices of a digraph $D$ is called an open neighbourhood locating-dominating set if every vertex in $D$ has an in-neighbour in $S$, and for every pair $u,v$ of vertices of $D$, there is a vertex in $S$ that is an in-neighbour of exactly one of $u$ and $v$. The smallest size of an open neighbourhood locating-dominating set of a digraph $D$ is denoted by $γ_{OL}(D)$. We study the class of digraphs $D$ whose only open neighbourhood locating-dominating set consists of the whole set of vertices, in other words, $γ_{OL}(D)$ is equal to the order of $D$. We call those digraphs extremal. By considering digraphs with loops allowed, our definition also applies to the related (and more widely studied) concept of identifying codes. We extend previous studies from the literature for both open neighbourhood locating-dominating sets and identifying codes of both undirected and directed graphs. These results all correspond to studying open neighbourhood locating-dominating sets on special classes of digraphs. To do so, we prove general structural properties of extremal digraphs, and we describe how they can all be constructed. We then use these properties to give new proofs of several known results from the literature. We also give a recursive and constructive characterization of the extremal di-trees (digraphs whose underlying undirected graph is a tree).
description: 19 pages, 4 figures
Improvement of steel quality by using hydrocarbon gas in a converter
Creators: name: Lee, Dong-Ryeol
Publisher: name: University of British Columbia
Year: 2010

description: Minimizing alumina (Al₂O₃) or other nonmetallic oxide inclusions formed during deoxidation is an important factor in producing 'quality' steel. Although a variety of practices are employed to encourage floatation of such deoxidation products prior to solidification, complete removal is never achieved. The amount of Al₂O₃ formed during deoxidation is determined by the residual dissolved oxygen present in the steel after decarburization. In a combined practice converter with Ar and/or N₂ gas bottomblowing, thermodynamics suggests [%C] x [%0] ≈ 0.0021 at the end of the blow. In practice, the dissolved oxygen content is ~ 525 ppm at 0.04% C which is consistent with thermodynamic predictions and indicates that, for a given %C, the combined blowing practice has achieved its lowest possible (equilibrium) oxygen level. Thermodynamic calculations indicate that injection of gaseous hydrocarbons such as methane (CH₄), partly replacing Ar and/or N₂, might allow significantly lower residual oxygen levels to be achieved; i.e. based on thermodynamics, [%C]x[%0] ≈ 0.000009 which translates into ~ 2 ppm dissolved oxygen at 0.04%C. In addition, the products of the deoxidation reaction are gaseous CO, CO₂ and H₂O rather solid or liquid Al₂O₃ or SiO₂ that can be difficult to completely remove prior to solidification. Substituting relatively cheap CH₄ for traditional deoxidizing additions such as aluminum or ferro-silicon might also lower overall costs. This research involved experimental investigation of methane deoxidation backedup by thermodynamic modeling to assess the theoretical limits for the process. The work also examined deoxidation rate and the impact of H and C solution into the steel. During the trials ~ 20 ppm residual oxygen was achieved. Although greater than thermodynamic predictions, this suggests the process might be of commercial interest.
Lattice-QCD based Schwinger-Dyson approach for Chiral Phase Transition
Creators: name: Iida, Hideaki
name: Oka, Makoto
name: Suganuma, Hideo
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Dynamical chiral-symmetry breaking in QCD is studied with the Schwinger-Dyson (SD) formalism based on lattice QCD data, i.e., LQCD-based SD formalism. We extract the SD kernel function $K(p^2)$ in an Ansatz-independent manner from the lattice data of the quark propagator in the Landau gauge. As remarkable features, we find infrared vanishing and intermediate enhancement of the SD kernel function $K(p^2)$. We apply the LQCD-based SD equation to thermal QCD with the quark chemical potential $μ_q$. We find chiral symmetry restoration at $T_c \simeq 100{\rm MeV}$ for $μ_q=0$. The real part of the quark mass function decreases as $T$ and $μ_q$. At finite density, there appears the imaginary part of the quark mass function, which would lead to the width broadening of hadrons.
description: 4 pages, 4 figures, Presented at Workshop on QCD Down Under, Barossa Valley and Adelaide, Australia, 10-19 Mar 2004
Power Factor Correction of Industrial Load (Induction Motor) using Microcontroller Arduino UNO
Creators: name: Tiwari, Shweta
Publisher: name: figshare
Year: 2020
Subjects: subject: 90699 Electrical and Electronic Engineering not elsewhere classified
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The need of Power is increasing day by day at a very high rate because of increase in demand and for the development of country by increasing industries. Electrical energy is must for any application in modern development. But the system should be efficient enough. Inductive load in the system shifts the efficiency of system as we know that time delay between voltage signal and current signal. Inductive are the major load in industries So we need to improve the time lag between voltage and current signal with a suitable method to improve efficiency. The project is designed to improve power factor which results in minimizing penalty for industrial units using automatic power factor correction unit.
Searching for new physics at future accelerators
Creators: name: Barbieri, Riccardo
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: I overview the status of the Electroweak Symmetry Breaking problem, paying special attention to the possible signals of new physics at the Large Hadron Collider (and at a Linear Collider)
description: 9 pages, plenary talk at ICHEP2004, Beijing, August 2004, typos corrected, added references
Learning Rope Manipulation Policies Using Dense Object Descriptors Trained on Synthetic Depth Data
Creators: name: Sundaresan, Priya
name: Grannen, Jennifer
name: Thananjeyan, Brijen
name: Balakrishna, Ashwin
name: Laskey, Michael
name: Stone, Kevin
name: Gonzalez, Joseph E.
name: Goldberg, Ken
Publisher: name: arXiv
Year: 2020
Subjects: subject: Robotics (cs.RO)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Robotic manipulation of deformable 1D objects such as ropes, cables, and hoses is challenging due to the lack of high-fidelity analytic models and large configuration spaces. Furthermore, learning end-to-end manipulation policies directly from images and physical interaction requires significant time on a robot and can fail to generalize across tasks. We address these challenges using interpretable deep visual representations for rope, extending recent work on dense object descriptors for robot manipulation. This facilitates the design of interpretable and transferable geometric policies built on top of the learned representations, decoupling visual reasoning and control. We present an approach that learns point-pair correspondences between initial and goal rope configurations, which implicitly encodes geometric structure, entirely in simulation from synthetic depth images. We demonstrate that the learned representation -- dense depth object descriptors (DDODs) -- can be used to manipulate a real rope into a variety of different arrangements either by learning from demonstrations or using interpretable geometric policies. In 50 trials of a knot-tying task with the ABB YuMi Robot, the system achieves a 66% knot-tying success rate from previously unseen configurations. See https://tinyurl.com/rope-learning for supplementary material and videos.
Anomalous time correlation in two-dimensional driven diffusive systems
Creators: name: Nakamura, Takenobu
name: Otsuki, Michio
name: Sasa, Shin-ichi
Publisher: name: arXiv
Year: 2004
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the time correlation function of a density field in two-dimensional driven diffusive systems within the framework of fluctuating hydrodynamics. It is found that the time correlation exhibits power-law behavior in an intermediate time regime in the case that the fluctuation-dissipation relation is violated and that the power-law exponent depends on the extent of this violation. We obtain this result by employing a renormalization group method to treat a logarithmic divergence in time.
description: 6 pages
Protocol for recording enamel hypoplasia in modern and archaeological caprine populations
Creators: name: Arbuckle, B.
name: Balasse, M.
name: Dobney, K.
name: Upex, B.
name: Tresset, A.
Publisher: name: John Wiley and Sons Ltd
Year: 2014

description: This paper outlines the first methodology for recording dental enamel hypoplasia in the high-crowned dentition of modern and archaeological caprine teeth. The method has been developed and trialed on five caprine populations from Orkney (UK); two modern populations (Shetland and North Ronaldsay breeds) and three Neolithic assemblages from the archaeological sites of Knap of Howar, Skara Brae and Holm of Papa Westray. Problems associated with differential tooth wear, as well as the presence of coronal cementum, are discussed, and recommendations are given on the identification and recording of hypoplastic dental defects in caprines.
On $τ$-function of conjugate nets
Creators: name: Doliwa, Adam
Publisher: name: arXiv
Year: 2004
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We study a potential introduced by Darboux to describe conjugate nets, which within the modern theory of integrable systems can be interpreted as a $τ$-function. We investigate the potential using the non-local $\bar\partial$ dressing method of Manakov and Zakharov, and we show that it can be interpreted as the Fredholm determinant of an integral equation which naturally appears within that approach. Finally, we give some arguments extending that interpretation to multicomponent Kadomtsev-Petviashvili hierarchy.
description: 8 pages
Transformation Econometric Model to Multidimensional Databases to Support the Analytical Systems in Agriculture
Creators: name: Tyrychtr, Jan
name: Vasilenko, Alexandr
name: Tyrychtr, Jan
name: Vasilenko, Alexandr
Publisher: name: Unknown
Year: 2015
Subjects: subject: Agribusiness
subject: Farm Management
subject: Research Methods/ Statistical Methods
subject: Multidimensional database
subject: OLAP
subject: econometric model
subject: production function
subject: conceptual design
subject: agriculture

description: Econometric model application in farms is a very complex process requiring knowledge not only the economy but also statistical and mathematical methods in agriculture workers themselves. The solution may be an application of econometric problems in analytical decision support systems for farms managers. For such a solution is necessary to design a multidimensional database for support online analytical data processing (OLAP). This paper proposes a new method (called TEM-CM) for formal transformation of econometric model to the conceptual data model for creating multidimensional schemes. This new method allows to formalize the process of transferring production function in agriculture to multidimensional data model and thus contribute to a more efficient design of data warehouses and OLAP databases for decision support in the agricultural analytics systems.
Analytic SU(N) Skyrmions at finite Baryon density
Creators: name: Alvarez, Pedro D.
name: Cacciatori, Sergio L.
name: Canfora, Fabrizio
name: Cerchiai, Bianca L.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We construct analytic (3+1)-dimensional Skyrmions living at finite Baryon density in the SU(N) Skyrme model that are not trivial embeddings of SU(2) into SU(N). We used Euler angles decomposition for arbitrary N and the generalized hedgehog Ansatz at finite Baryon density. The Skyrmions of high topological charge that we find represent smooth Baryonic layers whose properties can be computed explicitly. In particular, we determine the energy to Baryon charge ratio for any N showing the smoothness of the large N limit. The closeness to the BPS bound of these configurations can also be analyzed. The energy density profiles of these finite density Skyrmions have \textit{lasagna-like} shape in agreement with recent experimental findings. The shear modulus can be precisely estimated as well and our analytical result is close to recent numerical studies in the literature.
description: 36 pages, REVTeX, accepted for publication in Phys. Rev. D, added some references
Capitale umano e capitale sociale in agricoltura: un’analisi delle esperienze di filiera corta della Campania interna
Creators: name: Marotta, Giuseppe
name: Nazzaro, Concetta
name: Simeone, Mariarosaria
name: Marotta, Giuseppe
name: Nazzaro, Concetta
name: Simeone, Mariarosaria
Publisher: name: Unknown
Year: 2012
Subjects: subject: Agribusiness
subject: Marketing
subject: FOS: Economics and business
subject: Human capital
subject: social capital
subject: short-wine supply chain

description: In light of the problems that characterize the modern agri-business in the definition of competitive strategies, based on internal, tangible and intangible resources, it becomes necessary to pay attention to business networks, or inter-company relations aimed at commercial transactions, exchange of information, shared norms and associations of resources. All this constitutes an asset for which the company needs to improve its competitive advantage. The structure of relations that allows access to these resources is the social capital, it is in the business network and it is able to create competitiveness and value for the companies. Starting from the data made available by the Census of Agriculture 2000 (ISTAT), it was decided to define and quantify specific indicators of Human Capital and Social Capital in agriculture, in order to obtain a regional characterization of Italian agriculture. These indicators were analyzed with multivariate techniques: principal component analysis (ACP) and cluster analysis. In detail, the ACP has made it possible to synthesize the original variables into a smaller number of new variables (principal components) that can be identified as variables of synthesis of the phenomenon under analysis and allowed us to develop a mapping of land areas (regional, provincial ), with similar characteristics, in relation to the principal components extracted. Then, using the cluster analysis it was possible to identify groups of regions according to different levels of human capital and social capital. Once realized the national mapping and, therefore, after having obtained a characterization of the Campania region, we proceeded with an empirical analysis of the functional relationships between social capital and human capital in agriculture in the wineries firms that have taken courses in the short chain in the inner part of Campania region. The main results come from the mapping and the identification of groups of Italian regions according to different levels of human capital and social capital. Once the national mapping was carried out we try to characterize the inner part of Campania with a detailed study of the organization of the short chain of wine and livestock companies, considering the structural, cognitive and relational components of social networking. The results have allowed us to identify the relationships between associations, cooperatives and human capital factors.
Data augmentation for machine learning of chemical process flowsheets
Creators: name: Balhorn, Lukas Schulze
name: Hirtreiter, Edwin
name: Luderer, Lynn
name: Schweidtmann, Artur M.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: Optimization and Control (math.OC)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Artificial intelligence has great potential for accelerating the design and engineering of chemical processes. Recently, we have shown that transformer-based language models can learn to auto-complete chemical process flowsheets using the SFILES 2.0 string notation. Also, we showed that language translation models can be used to translate Process Flow Diagrams (PFDs) into Process and Instrumentation Diagrams (P&IDs). However, artificial intelligence methods require big data and flowsheet data is currently limited. To mitigate this challenge of limited data, we propose a new data augmentation methodology for flowsheet data that is represented in the SFILES 2.0 notation. We show that the proposed data augmentation improves the performance of artificial intelligence-based process design models. In our case study flowsheet data augmentation improved the prediction uncertainty of the flowsheet autocompletion model by 14.7%. In the future, our flowsheet data augmentation can be used for other machine learning algorithms on chemical process flowsheets that are based on SFILES notation.
description: Submitted to PROCEEDINGS OF THE 33rd European Symposium on Computer Aided Process Engineering (ESCAPE33), June 18-21, 2023, Athens, Greece
PRODUCCIÓN DE LECHE OVINA COMO ALTERNATIVA DE NEGOCIO AGROPECUARIO: MODELO DE PRODUCCIÓN EN CASTILLA Y LEÓN (ESPAÑA)
Creators: name: Garcia-Diaz, Leidy K.
name: Mantecon, Angel R.
name: Sepulveda, Wilmer S.
name: Maza, Maria T.
name: Garcia-Diaz, Leidy K.
name: Mantecon, Angel R.
name: Sepulveda, Wilmer S.
name: Maza, Maria T.
Publisher: name: Unknown
Year: 2012
Subjects: subject: Agribusiness
subject: Sheep milk
subject: sheep production systems.

description: Inside the fresh milk business, worldwide, milk sheep is the one that has less participation, lower than the cows and buffaloes. Still, in some regions like Castilla y León in Spain, the milk sheep production has a great economic importance, because it presents a production model and an advanced agroindustrial and besides, is an important alternative livestock business in disadvantaged rural areas. In this paper, it is described the milk sheep production from a global and national point-view. Also it is analyzed the milk sheep production in Castilla y León, Spain's biggest producing region, for it production systems and cooperation systems are described and there are also provided strategies and studies related to profitability in dairy sheep farms.
Pig domestication and human-mediated dispersal in western eurasia revealed through ancient DNA and geometric morphometrics
Creators: name: Rasmussen, M.
name: Girdland Flink, L.
name: Mohaseb Karimlu, A.F.
name:  Arbuckle, B.
name: Ottoni, C.
name: Daujat, J.
name: Frantz, L.
name:  Benecke, N.
name:  Larson, G.
name: Perez-Enciso, M.
name:  Crooijmans, R.
name:  Dobney, K.
name: Barnett, R.
name:  Groenen, M.
name: Geörg, C.
name: Bartosiewicz, L.
name: Peters, J.
name: Van Neer, W.
name: Mashkour, M.
name: Hongo, H.
name: De Cupere, B.
name: Decorte, R.
name: Ricaut, F.-X.
name: Çakirlar, C.
name:  Strand Vidarsdottir, U.
name: Brock, F.
name: Çevik, Ö.
name:  Burger, J.
name: Sheikhi Seno, S.
name: Waelkens, M.
name: Hoelzel, A.R.
name:  Cucchi, T.
name: Vanderheyden, N.
name: Evin, A.,
name:  Megens, H.-J.
name: Pinhasi, R.
name: Linderholm, A.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2013

description: Zooarcheological evidence suggests that pigs were domesticated in Southwest Asia ∼8,500 BC. They then spread across the Middle and Near East and westward into Europe alongside early agriculturalists. European pigs were either domesticated independently or more likely appeared so as a result of admixture between introduced pigs and European wild boar. As a result, European wild boar mtDNA lineages replaced Near Eastern/Anatolian mtDNA signatures in Europe and subsequently replaced indigenous domestic pig lineages in Anatolia. The specific details of these processes, however, remain unknown. To address questions related to early pig domestication, dispersal, and turnover in the Near East, we analyzed ancient mitochondrial DNA and dental geometric morphometric variation in 393 ancient pig specimens representing 48 archeological sites (from the Pre-Pottery Neolithic to the Medieval period) from Armenia, Cyprus, Georgia, Iran, Syria, and Turkey. Our results reveal the first genetic signatures of early domestic pigs in the Near Eastern Neolithic core zone. We also demonstrate that these early pigs differed genetically from those in western Anatolia that were introduced to Europe during the Neolithic expansion. In addition, we present a significantly more refined chronology for the introduction of European domestic pigs into Asia Minor that took place during the Bronze Age, at least 900 years earlier than previously detected. By the 5th century AD, European signatures completely replaced the endemic lineages possibly coinciding with the widespread demographic and societal changes that occurred during the Anatolian Bronze and Iron Ages.
The role of internal stress in strengthening heavily codeformed two-phase materials
Creators: name: Killick, Matthew J.
Publisher: name: University of British Columbia
Year: 2010

description: Heavily codeformed two-phase materials can show anomalous increases in strength as a function of the level of deformation. The strength of these materials can vary considerably from what is predicted by the rule of mixtures. Understanding the mechanisms responsible for the strengthening of these materials can lead to the better understanding of the strengthening of the individual phases and aid in the development of other materials that exhibit similar properties. This thesis examines the role of internal stresses on the strengthening of heavily codeformed two-phase materials. The magnitude of these stresses and the effects of annealing on them are studied in various types of copper-niobium composites: bundle drawn and in-situ drawn wire produced at the National High Field Magnet Laboratory in Los Alamos, USA; and a layered composite produced at the University of British Columbia as part of this work. Tensile testing was done to determine the mechanical properties of the copper-niobium composites and load-unload or tension-compression tests were done to quantify the levels of internal stresses in the material. The wire drawn composites were found to possess flow stresses much higher than predicted by the rule of mixtures and to contain considerable levels of internal stress. Internal stresses, measured by investigating the Bauschinger effect, and the flow stresses of all the drawn materials were found to decreases as the annealing temperature increased; however, the in-situ composite was found to be more resistant to annealing than the bundle drawn wire. The strength of the laminate composite, produced via multiple roll bonding, was found to be adequately described by the rule of mixtures. Although the rolling strain was not sufficient to produce anomalous strengthening, the internals stresses in the laminate where found to be more than twice that predicted by the rule of mixtures.
Continuation of the Stieltjes Series to the Large Regime by Finite-part Integration
Creators: name: Tica, Christian D.
name: Galapon, Eric A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We devise a prescription to utilize a novel convergent expansion in the strong-asymptotic regime for the Stieltjes integral and its generalizations [Galapon E.A Proc.R.Soc A 473, 20160567(2017)] to sum the associated divergent series of Stieltjes across all asymptotic regimes. The novel expansion makes use of the divergent negative-power moments which we treated as Hadamard's finite part integrals. The result allowed us to compute the ground-state energy of the quartic, sextic anharmonic oscillators as well as the $\mathcal{PT}$ symmetric cubic oscillator, and the funnel potential across all perturbation regimes from a single expansion that is built from the divergent weak-coupling perturbation series and incorporates the known leading-order strong-coupling behavior of the spectra.
Chaotic itinerancy and power-law residence time distribution in stochastic dynamical system
Creators: name: Namikawa, Jun
Publisher: name: arXiv
Year: 2004
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: To study a chaotic itinerant motion among varieties of ordered states, we propose a stochastic model based on the mechanism of chaotic itinerancy. The model consists of a random walk on a half-line, and a Markov chain with a transition probability matrix. To investigate the stability of attractor ruins in the model, we analyze the residence time distribution of orbits at attractor ruins. We show that the residence time distribution averaged by all attractor ruins is given by the superposition of (truncated) power-law distributions, if a basin of attraction for each attractor ruin has zero measure. To make sure of this result, we carry out a computer simulation for models showing chaotic itinerancy. We also discuss the fact that chaotic itinerancy does not occur in coupled Milnor attractor systems if the transition probability among attractor ruins can be represented as a Markov chain.
description: 6 pages, 10 figures
PERCEPCIÓN DEL CONSUMIDOR Y PRODUCTOR DE ORGÁNICOS: EL MERCADO OCELOTL DE XALAPA, VER. MÉXICO
Creators: name: Perez Vazquez, Arturo
name: Lang Ovalle, Fritz Paul
name: Peralta Garay, Ignacio
name: Aguirre Perez, Francisco Jair
name: Perez Vazquez, Arturo
name: Lang Ovalle, Fritz Paul
name: Peralta Garay, Ignacio
name: Aguirre Perez, Francisco Jair
Publisher: name: Unknown
Year: 2012
Subjects: subject: Agribusiness
subject: Organic agriculture
subject: organic food
subject: willingness to pay.

description: The objective of this study was to explore the perception and attitude of consumers and organic producers of Ocelotl market from Xalapa, Veracruz, Mexico. The main issues searched were with the purpose for consuming or producing organic products, main benefits received by consuming or producing organics and the extra payment that consumers would be willing to pay and farmers would be willing to receive for organic products. A survey based on questionnaire was applied during 2007 to consumers and farmers/sellers of organic products. A total of 20 consumers and 18 farmers/sellers were interviewed. This sample frame of consumers represents the 60% and nearly 90% of the whole farmers, respectively. Anova and correlation analyzes were performed. It was found that organic consumption is determined due to its health benefit (86%), environmental concern (31%), taste (26%), freshness (20%) and to be free of pesticides (3%). Statistical difference was found between willing to pay and food stipends by consumers. 69% agree and fully agree to give an extrapayment and 17% disagree and fully disagree on that. 61, 28 y 11% of the consumers were willing to pay 10%, 20% and 40% for organics. It was identified the main issues to improve cooperation among consumers, producers and local authorities.
EL SIGNIFICADO DE LOS VALORES EN LAS COMPETENCIAS INDIVIDUALES Y COLECTIVAS
Creators: name: Climent Bonilla, Juan B.
name: Climent Bonilla, Juan B.
Publisher: name: Unknown
Year: 2012
Subjects: subject: Agribusiness
subject: Competences
subject: competencies
subject: competence-based education
subject: ethics
subject: instruction
subject: training
subject: values.

description: The movement of education and training based on competences, after three decades of worldwide expansion, has practically become a strategic instrument of educative and labor policy for economic competitiveness of organizations, productive sectors, countries and regions. In the same trend, while emphasis is made on the importance of practical knowledge and skills —inherent to personal know how (competencies) related to tasks, roles or functions of particular or general interest—, values usually pass unnoticed or remain hidden. The main purpose of this article is to enhance the meaning of values concerning individual and collective competencies. For such a purpose, on the basis of an ample conceptual framework, from which different analysis perspectives were obtained and integrated, a theoretical research was accomplished. Evidences, arguments and conclusions sustain the thesis that the culture of competence-based education and training has largely neglected or omitted the component of values, impoverishing the sense and role of competencies themselves, from an ample scope.
Abstract: One-size-fits-all: Psycholinguistic self-paced reading experiment supporting discourse analysis of the non-standard, gender-neutral mandarin pronoun ‘TA’
Creators: name: Sluchinski, Kerry
name: Gallant, Jordan
Publisher: name: figshare
Year: 2020
Subjects: subject: Linguistics
subject: FOS: Languages and literature
subject: 170204 Linguistic Processes (incl. Speech Production and Comprehension)
subject: FOS: Psychology
subject: 200499 Linguistics not elsewhere classified

description: This is an accepted abstract submitted to DisCorX 2020: Discourse in corpus and experimental data: bridging the methodological gap.
Recent issues in hadron spectroscopy
Creators: name: Richard, J. -M.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A brief survey is presented of recently discovered hadrons, some of them presumably demonstrating a new kind of internal structure. This includes : spin-singlet quarkonium, mesons with unexpected mass or width, baryons with two heavy quarks, and pentaquark candidates. Flavour configurations with a combination of light and heavy quarks appear as particularly promising.
description: Based on an invited talk at the session on Subnucleon degrees of freedom