cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Gravitational lens under perturbations: Symmetry of perturbing potentials with invariant caustics
Creators: name: An, Jin H.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: When the gravitational lensing potential can be approximated by that of circularly symmetric system affected by weak perturbations, it is found that the shape of the resulting (tangential) caustics is entirely specified by the local azimuthal behaviour of the affecting perturbations. This provides a common mathematical groundwork for understanding problems such as the close-wide (d 1/d) separation degeneracy of binary lens microlensing lightcurves and the shear-ellipticity degeneracy of quadruple image lens modelling.
description: to appear in MNRAS, including 4 figures, typo corrected, essentially identical to the version to be published
Interpretable machine learning of amino acid patterns in proteins: a statistical ensemble approach
Creators: name: Braghetto, Anna
name: Orlandini, Enzo
name: Baiesi, Marco
Publisher: name: arXiv
Year: 2023
Subjects: subject: Biomolecules (q-bio.BM)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Machine Learning (cs.LG)
subject: FOS: Biological sciences
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Explainable and interpretable unsupervised machine learning helps understand the underlying structure of data. We introduce an ensemble analysis of machine learning models to consolidate their interpretation. Its application shows that restricted Boltzmann machines compress consistently into a few bits the information stored in a sequence of five amino acids at the start or end of $α$-helices or $β$-sheets. The weights learned by the machines reveal unexpected properties of the amino acids and the secondary structure of proteins: (i) His and Thr have a negligible contribution to the amphiphilic pattern of $α$-helices; (ii) there is a class of $α$-helices particularly rich in Ala at their end; (iii) Pro occupies most often slots otherwise occupied by polar or charged amino acids, and its presence at the start of helices is relevant; (iv) Glu and especially Asp on one side, and Val, Leu, Iso, and Phe on the other, display the strongest tendency to mark amphiphilic patterns, i.e., extreme values of an "effective hydrophobicity", though they are not the most powerful (non) hydrophobic amino acids.
description: 15 pages, 9 figures
The Mott transition in the 5d$^1$ compound Ba$_2$NaOsO$_6:$ a DFT+DMFT study with PAW spinor projectors
Creators: name: Mosca, Dario Fiore
name: Schnait, Hermann
name: Celiberti, Lorenzo
name: Aichhorn, Markus
name: Franchini, Cesare
Publisher: name: arXiv
Year: 2023
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Spin-orbit coupling has been reported to be responsible for the insulating nature of the 5d$^1$ osmate double perovskite Ba$_2$NaOsO$_6$ (BNOO). However, whether spin-orbit coupling indeed drives the metal-to-insulator transition (MIT) in this compound is an open question. In this work we investigate the impact of relativistic effects on the electronic properties of BNOO via density functional theory plus dynamical mean-field theory calculations in the paramagnetic regime, where the insulating phase is experimentally observed. The correlated subspace is modeled with spinor projectors of the projector augumented wave method (PAW) employed in the Vienna Ab Initio Simulation Package (VASP), suitably interfaced with the TRIQS package. The inclusion of PAW spinor projectors in TRIQS enables the treatment of spin-orbit coupling effects fully ab-initio within the dynamical mean-field theory framework. In the present work, we show that spin-orbit coupling, although assisting the MIT in BNOO, is not the main driving force for its gapped spectra, placing this material in the Mott insulator regime. Relativistic effects primarily impact the correlated states' character, excitations, and magnetic ground-state properties.
Human Resource Diversity Management in Selected Czech Agricultural Companies
Creators: name: Urbancová, Hana
name: Čermáková, H.
name: Navrátilová, M.
name: Urbancová, Hana
name: Čermáková, H.
name: Navrátilová, M.
Publisher: name: Unknown
Year: 2015
Subjects: subject: Agribusiness
subject: Production Economics
subject: Productivity Analysis
subject: Research Methods/ Statistical Methods
subject: Human resources
subject: Diversity Management
subject: agriculture
subject: the Czech Republic
subject: labour fource
subject: company

description: The aim of this paper is to evaluate human resource Diversity Management in agricultural companies in the Czech Republic and to prepare a set of recommendations for the companies in this area. The primary data for the study was obtained by the use of questionnaires designed for quantitative analysis (n = 549, nagriculture = 108). The results indicate that the use of Diversity Management on Czech companies is relatively low (36.1%; na = 108). But in view of the employment situation in the agricultural sector, as well as the characteristics of the workforce engaged in agriculture, it would appear that Diversity Management will become an important feature of company management in the not so distant future. This contribution is a follow-up to the project of University – wide internal grant agency (CIGA), number 20141002 - Human resource branding using of the new strategic trends in organizations in the Czech Republic.
TAnoGAN: Time Series Anomaly Detection with Generative Adversarial Networks
Creators: name: Bashar, Md Abul
name: Nayak, Richi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Anomaly detection in time series data is a significant problem faced in many application areas such as manufacturing, medical imaging and cyber-security. Recently, Generative Adversarial Networks (GAN) have gained attention for generation and anomaly detection in image domain. In this paper, we propose a novel GAN-based unsupervised method called TAnoGan for detecting anomalies in time series when a small number of data points are available. We evaluate TAnoGan with 46 real-world time series datasets that cover a variety of domains. Extensive experimental results show that TAnoGan performs better than traditional and neural network models.
description: Made some minor changes. This is the accepted version of the paper at AusDM'20
Higher Order Corrections to Black Hole Entropy
Creators: name: More, Surhud Shrikant
Publisher: name: arXiv
Year: 2004
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A scheme for calculating corrections to all orders to the entropy of any thermodynamic system due to statistical fluctuations around equilibrium has been developed. It is then applied to the BTZ black hole, AdS-Schwarzschild black Hole and Schwarzschild black Hole in a cavity. The scheme that we present is a model-independent scheme and hence universally applicable to all classical black holes with positive specific heat. It has been seen earlier that the microcanonical entropy of a system can be more accurately reproduced by considering a logarithmic correction to the canonical entropy function. The higher order corrections will be a step further in calculating the microcanonical entropy of a black hole.
description: 9 pages, Revised version to appear in Classical and Quantum Gravity
Differences in the Economic Situation of Organic and Conventional Winemaking Enterprises
Creators: name: Vlašicová, Eliška
name: Náglová, Zdeňka
name: Vlašicová, Eliška
name: Náglová, Zdeňka
Publisher: name: Unknown
Year: 2015
Subjects: subject: Agribusiness
subject: Agricultural Finance
subject: Political Economy
subject: Productivity Analysis
subject: Research Methods/ Statistical Methods
subject: Wineries
subject: economic analysis
subject: t-test
subject: subsidies

description: The number of organic farms in the Czech Republic is increasing as well as the number of organic winemaking enterprises. The article deals with an evaluation and comparison of the economic situation of organic and conventional winemaking enterprises in the Czech Republic. An economic analysis of the 75 enterprises accounting data from 2007 to 2011 has been done. The financial analysis indicators, bankruptcy models, efficiency indicator and performance indicators were calculated. In order to compare the values of the respective indicators the t-test was used. The performed analysis confirmed a better economic situation of organic winemaking enterprises. Winemaking businesses – whether organic or conventional – are capable of a good financial management and generate profit even without the aid of any subsidies. This article was created as a part of IGA 20141046 project.
The Online Pause and Resume Problem: Optimal Algorithms and An Application to Carbon-Aware Load Shifting
Creators: name: Lechowicz, Adam
name: Christianson, Nicolas
name: Zuo, Jinhang
name: Bashir, Noman
name: Hajiesmaili, Mohammad
name: Wierman, Adam
name: Shenoy, Prashant
Publisher: name: arXiv
Year: 2023
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: We introduce and study the online pause and resume problem. In this problem, a player attempts to find the $k$ lowest (alternatively, highest) prices in a sequence of fixed length $T$, which is revealed sequentially. At each time step, the player is presented with a price and decides whether to accept or reject it. The player incurs a switching cost whenever their decision changes in consecutive time steps, i.e., whenever they pause or resume purchasing. This online problem is motivated by the goal of carbon-aware load shifting, where a workload may be paused during periods of high carbon intensity and resumed during periods of low carbon intensity and incurs a cost when saving or restoring its state. It has strong connections to existing problems studied in the literature on online optimization, though it introduces unique technical challenges that prevent the direct application of existing algorithms. Extending prior work on threshold-based algorithms, we introduce double-threshold algorithms for both the minimization and maximization variants of this problem. We further show that the competitive ratios achieved by these algorithms are the best achievable by any deterministic online algorithm. Finally, we empirically validate our proposed algorithm through case studies on the application of carbon-aware load shifting using real carbon trace data and existing baseline algorithms.
description: 34 pages, 12 figures
Additional file 1 of Extracellular vesicles as therapeutic tools in regenerative dentistry
Creators: name: Xia, Evelyn Jingwen
name: Zou, Shasha
name: Zhao, Xiu
name: Liu, Wei
name: Zhang, Yang
name: Zhao, Irene Shuping
Publisher: name: figshare
Year: 2024
Subjects: subject: Biophysics
subject: Biochemistry
subject: Space Science
subject: Physical Sciences not elsewhere classified
subject: Medicine
subject: Molecular Biology
subject: Physiology
subject: FOS: Biological sciences
subject: Chemical Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer
subject: Computational Biology

description: Supplementary material 1
Intrinsic sign problem in fermionic and bosonic chiral topological matter
Creators: name: Golan, Omri
name: Smith, Adam
name: Ringel, Zohar
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Lattice (hep-lat)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The infamous sign problem leads to an exponential complexity in Monte Carlo simulations of generic many-body quantum systems. Nevertheless, many phases of matter are known to admit a sign-problem-free representative, allowing efficient simulations on classical computers. Motivated by long standing open problems in many-body physics, as well as fundamental questions in quantum complexity, the possibility of intrinsic sign problems, where a phase of matter admits no sign-problem-free representative, was recently raised but remains largely unexplored. Here, we establish the existence of an intrinsic sign problem in a broad class of gapped, chiral, topological phases of matter. Within this class, we exclude the possibility of stoquastic Hamiltonians for bosons (or 'qudits'), and of sign-problem-free determinantal Monte Carlo algorithms for fermions. The intrinsically sign-problematic class of phases we identify is defined in terms of topological invariants with clear observable signatures: the chiral central charge, and the topological spins of anyons. We obtain analogous results for phases that are spontaneously chiral, and present evidence for an extension of our results that applies to both chiral and non-chiral topological matter.
description: 16 pages, 6 figures, 1 table (+ appendix: 8 pages, 2 figures). v2: updated Table I, additional minor changes
On BIBO stability of infinite-dimensional linear state-space systems
Creators: name: Schwenninger, Felix L.
name: Wierzba, Alexander A.
name: Zwart, Hans
Publisher: name: arXiv
Year: 2023
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 93D25, 93C05, 47D06, 93C20

description: In this paper we consider BIBO stability of systems described by infinite-dimensional linear state-space representations, filling the so far unattended gap of a formal definition and characterization of BIBO stability in this general case. Furthermore, we provide several sufficient conditions guaranteeing BIBO stability of a particular system and discuss to which extent this property is preserved under additive and multiplicative perturbations of the system.
description: 21 pages, streamlined presentation, minor changes
title: Die M&A Versicherung als Sicherheit beim Unternehmenskaufvertrag insbesondere bei Schadloshaltungs- und Gewährleistungsklauseln vor Ansprüchen des Gewerblichen Rechtsschutzes
Creators: name: Kleisinger, Edith
Publisher: name: TU Wien
Year: 2017
Subjects: subject: M&A-Versicherung bei Anspruchserhebungen im Immaterialgüterrechtsschutz

description: Die vorliegende Arbeit hat die Versicherbarkeit von Risiken im Zuge von Unternehmenstransaktionen zum Inhalt. Es wird untersucht, wie Versicherungen leisten, sollten Unternehmenskaufverträge nicht dem Geschuldeten entsprechen. Ansprüche, die infolgedessen seitens der Vertragsparteien gestellt werden können, stellen somit ein Risiko dar, das versicherbar ist. Dies ist das versicherbare Risiko bei M&A Versicherungen. Insbesondere geht es um die Versicherung von Zusagen im Unternehmenskaufvertrag, wobei möglichen Garantien und Zusagen erörtert werden, und wie die Interessen der Vertragsparteien hierbei gelagert sind. Besonders interessieren Zusagen im Bereich des Immaterialgüterrechts. Das Risiko der Verletzung von Immaterialgüterrechten soll genauer untersucht werden und wie dieses Risiko versicherbar ist. Besonders wird die haftpflichtlastige, verkäuferseitige M&A-Versicherung hervorgehoben und die Frage gestellt, ob eine M&A-Versicherung auch für Haftpflichtansprüche Dritter Versicherungsschutz bietet, zumal der Versicherungsschutz üblicherweise nur die Parteien des Unternehmenskaufvertrages betrifft, bzw. wie anderweitig Versicherungsschutz geboten werden kann. Dabei wird die Frage in den Raum gestellt, ob etwaige Kosten einer Anspruchserhebung durch den Dritten diesem durch eine Haftpflichtversicherung des Schädigers ersetzt werden können (Rechtsschutzversicherungscharakter der Abwehrdeckung). Somit werden neben der M&A Versicherung noch andere Versicherungslösungen beleuchtet. In einem weiteren Teil werden die Behelfe bei Verletzungen vom Immaterialgüterrechten aufgezeigt, wobei zuvor ein genereller Überblick über das Rechtsgebiet des gewerblichen Rechtsschutzes gegeben wird, um die Gefahren der Verletzung dieser Rechte bei einer M&A-Transaktion zu veranschaulichen.
Contributions to the arithmetic of elliptic curves
Creators: name: Ingram, Patrick M.
Publisher: name: University of British Columbia
Year: 2010

description: We present various published and unpublished results on elliptic curves. In particular, we focus on the torsion structures of elliptic curves, and how this is, influenced by the relative sizes of the coefficients. We see in the final chapter that these results axe special cases of a more general result on approximating rational numbers j-invariants of elliptic curves with certain structures. Various other results regarding the divisibility properties (and consequently integrality) of rational points on elliptic curves are also discussed.
Competitiveness Improvement Strategy of Soybean Commodity: Study of Food Security in East Java - Indonesia
Creators: name: Zainuri, Ahmad
name: Wardhono, A.
name: Sutomo
name: Ridjal, J. A.
name: Zainuri, Ahmad
name: Wardhono, A.
name: Sutomo
name: Ridjal, J. A.
Publisher: name: Unknown
Year: 2015
Subjects: subject: Community/Rural/Urban Development
subject: Food Consumption/Nutrition/Food Safety
subject: Competitiveness
subject: food security
subject: government policy
subject: soybeans

description: The increase in soybean prices is caused by an imbalance between the ability to produce soybeans in the country and the increase in demand, so that scarcity of soybean is an issue in an agricultural country like Indonesia. The purpose of this study was to determine the mapping and competitiveness of soybean in East Java, as well as to find out alternative government policies to increase the fair competitiveness of soybean in East Java. Based on the results of the analysis, the recommendation on the most effective policy is the development of competitiveness of local soybean and maintaining the performance of the existing farmer groups, as well as the stabilization of local soybean prices.
Improved constraints on minimum length models with a macroscopic low loss phonon cavity
Creators: name: Campbell, William M.
name: Tobar, Michael E.
name: Galliou, Serge
name: Goryachev, Maxim
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Many theories that attempt to formulate a quantum description of gravity suggest the existence of a fundamental minimum length scale. A popular method for incorporating this minimum length is through a modification of the Heisenberg uncertainty principle known as the generalised uncertainty principle (GUP). Experimental tests of the GUP applied to composite systems can be performed by searching for the induced frequency perturbations of the modes of mechanical resonators, thus constraining the degree of minimum length in certain scenarios. In this work previous constraints made with mechanical resonators are improved upon by three orders of magnitude, via the utilisation of a cryogenic quartz bulk acoustic wave resonator. As well as purely mechanical resonant modes; hybrid electromechanical anti-resonant modes are investigated, and shown to be sensitive to the same GUP induced effects.
description: 6 pages, 4 figures
QCD Green functions in a gluon field
Creators: name: Hoyer, Paul
name: Peigne, Stephane
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We formulate a dressed perturbative expansion of QCD, where the standard diagrams are evaluated in the presence of a constant external gluon field whose magnitude is gaussian distributed. The approach is Poincar{é} and gauge invariant, and modifies the usual results for hard processes only by power suppressed contributions. Long distance propagation of quarks and gluons turns out to be inhibited due to a branch point singularity instead of a pole at $p^2=0$ in the quark and gluon propagators. The dressing keeps the (massless) quarks in q qbar fluctuations of the photon at a finite distance from each other.
description: 21 pages, 7 figures. Minor modifications in text. Version to be published in JHEP
Entanglement spectrum of geometric states
Creators: name: Guo, Wu-zhong
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The reduced density matrix of a given subsystem, denoted by $ρ_A$, contains the information on subregion duality in a holographic theory. We may extract the information by using the spectrum (eigenvalue) of the matrix, called entanglement spectrum in this paper. We evaluate the density of eigenstates, one-point and two-point correlation functions in the microcanonical ensemble state $ρ_{A,m}$ associated with an eigenvalue $λ$ for some examples, including a single interval and two intervals in vacuum state of 2D CFTs. We find there exists a microcanonical ensemble state with $λ_0$ which can be seen as an approximate state of $ρ_A$. The parameter $λ_0$ is obtained in the two examples. For a general geometric state, the approximate microcanonical ensemble state also exists. The parameter $λ_0$ is associated with the entanglement entropy of $A$ and Rényi entropy in the limit $n\to \infty$. As an application of the above conclusion we reform the equality case of the Araki-Lieb inequality of the entanglement entropies of two intervals in vacuum state of 2D CFTs as conditions of Holevo information. We show the constraints on the eigenstates. Finally, we point out some unsolved problems and their significance on understanding the geometric states.
description: references added
Analysis of the Behaviour of Prices of Major Staple Foods in West Africa: A Case Study of Nigeria
Creators: name: Ayinde, Opeyemi Eyitayo
name: Ilori, T. E.
name: Ayinde, K.
name: Babatunde, R. O.
name: Ayinde, Opeyemi Eyitayo
name: Ilori, T. E.
name: Ayinde, K.
name: Babatunde, R. O.
Publisher: name: Unknown
Year: 2015
Subjects: subject: Crop Production/Industries
subject: Food Security and Poverty
subject: Institutional and Behavioral Economics
subject: Land Economics/Use
subject: Staple food
subject: prices
subject: behavior
subject: maize
subject: rice
subject: yams
subject: cowpea
subject: sorghum and cassava

description: The study analyzed the price behavior of major staple foods in West Africa taking Nigeria as a case study (1966 – 2011). It described the trend of the major staple food prices and examined the linear relationship and interdependence of the major staple food prices in Nigeria. Secondary data were used for this study. The sources were; Food and Agriculture Organization (FAO), and National Bureau of Statistics (NBS). These data were transformed from their nominal value to real value and analyzed using descriptive statistics, unit root test, Pearson correlation coefficient, granger-causality test and structural equation model. The study revealed that the prices of most of the major staple foods were at the maximum value between 1991 and 1993 while their prices were at the minimum value between 1978 and 1983. The study observed that the price of cowpea is most volatile seconded by maize. The results of the unit root test showed that all the variables studied were stationary. The prices of the major staple foods were linearly correlated; some were positively correlated while some were negatively correlated. Granger-causality test on the major staple foods prices showed that the prices of most staple foods were unidirectional while only few were bi-directional. The study further revealed that the prices of staple foods were interdependent. The study recommends political stability in the country as the major staple food prices reached maximum level during the period of 1993 presidential election crisis.
Time-modulated inerters as building blocks for nonreciprocal mechanical devices
Creators: name: Celli, Paolo
name: Palermo, Antonio
Publisher: name: arXiv
Year: 2023
Subjects: subject: Classical Physics (physics.class-ph)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: In this work, we discuss the realization of mechanical devices with non-reciprocal attributes enabled by inertia-amplifying, time-modulated mechanisms. Our fundamental building-block features a mass, connected to a fixed ground through a spring and to a moving base through a mechanism-based inerter. Through analytical derivations and numerical simulations, we provide details on the nonlinear dynamics of such system. We demonstrate that providing a time modulation to the inerter's base produces two additions on the dynamics of the main spring-mass oscillator: i) an effective time-modulated mass term, and ii) a time varying force term; both quantities are functions of the modulating frequency. With specific choices of parameters, the modulation-induced force term -- that represents one of the main drawbacks in most experimental realizations of purely time-modulated systems -- vanishes and we are left with an effective time-varying mass. We then illustrate that this building block can be leveraged to realize non-reciprocal wave manipulation devices, and concentrate on a non-reciprocal beam-like waveguide. The simple design and the clean performance of our system makes it an attractive candidate for the realization of fully mechanical non-reciprocal devices.
Developing the Metodology to Form Integrated Reporting of Agroholdings in the Russian Federation
Creators: name: Balashova, Natalia Nikolaevna
name: Šilerová, Edita
name: Melikhov, V. A.
name: Balashova, Natalia Nikolaevna
name: Šilerová, Edita
name: Melikhov, V. A.
Publisher: name: Unknown
Year: 2015
Subjects: subject: Agribusiness
subject: Productivity Analysis
subject: Research and Development/Tech Change/Emerging Technologies
subject: Research Methods/ Statistical Methods
subject: Methodology of integrated reporting
subject: uniform accounting system
subject: agro-industrial holdings
subject: organization of integrated accounting
subject: road map
subject: guidelines on methodology development.

description: The article represents the efficient methodological principles on preparing the integrated reporting, as well as the scheme of the agroholding coherently integrated registration system based on the analysis of the concept and methodology in the field of the integrated reporting; it specifies "growth points" of the methodology development and best practical applications of the concept of uniform reporting on a global scale. The authors propose the developed by them "road map" on the organization process forming the integrated reports, and define the guidelines on improving the process of preparing and quality of the integrated reporting for the medium-term period.
Precision radial velocities of double-lined spectroscopic binaries with an iodine absorption cell
Creators: name: Konacki, Maciej
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A spectroscopic technique employing an iodine absorption cell (I_2) to superimpose a reference spectrum onto a stellar spectrum is currently the most widely adopted approach to obtain precision radial velocities of solar-type stars. It has been used to detect ~80 extrasolar planets out of ~130 know. Yet in its original version, it only allows us to measure precise radial velocities of single stars. In this paper, we present a novel method employing an I_2 absorption cell that enables us to accurately determine radial velocities of both components of double-lined binaries. Our preliminary results based on the data from the Keck I telescope and HIRES spectrograph demonstrate that 20-30 m/s radial velocity precision can be routinely obtained for "early" type binaries (F3-F8). For later type binaries, the precision reaches ~10 m/s. We discuss applications of the technique to stellar astronomy and searches for extrasolar planets in binary systems. In particular, we combine the interferometric data collected with the Palomar Testbed Interferometer with our preliminary precision velocities of the spectroscopic double-lined binary HD 4676 to demonstrate that with such a combination one can routinely obtain masses of the binary components accurate at least at the level of 1.0%.
description: Accepted for publication in The Astrophysical Journal
Augmented Reality As a Working Aid for Intellectually Disabled Persons For Work in Horticulture
Creators: name: Benda, Petr
name: Ulman, Miloš
name: Šmejkalová, Martina
name: Benda, Petr
name: Ulman, Miloš
name: Šmejkalová, Martina
Publisher: name: Unknown
Year: 2015
Subjects: subject: Research and Development/Tech Change/Emerging Technologies
subject: Research Methods/ Statistical Methods
subject: Teaching/Communication/Extension/Profession
subject: Accessibility
subject: Augmented Reality
subject: intellectual disability
subject: horticulture

description: The main focus of this article is to verify experimentally the possibility of using Augmented Reality as a platform for display educational materials in the field of horticulture in the real world for people with intellectual disabilities. Experimental verification was attended by eight people with varying levels of mental disability. The educational material was presented to the research participants in the form of a video, which was accessible via Wikitude platform based on the specific GPS coordinates. To find and display the content, participants used iPad2 and Android tablet devices. Despite the great potential of Augmented Reality technology, on the basis of undertaken studies it is still not possible to recommend this type of education for people with intellectual disabilities.
Market Power in the European Dairy Industry
Creators: name: Čechura, Lukáš
name: Žáková Kroupová, Zdeňka
name: Hockmann, H.
name: Čechura, Lukáš
name: Žáková Kroupová, Zdeňka
name: Hockmann, H.
Publisher: name: Unknown
Year: 2015
Subjects: subject: Agricultural Finance
subject: Crop Production/Industries
subject: Research and Development/Tech Change/Emerging Technologies
subject: Research Methods/ Statistical Methods
subject: Risk and Uncertainty
subject: Milk
subject: market power
subject: oligopoly
subject: SFA
subject: European Union

description: The paper presents an analysis of market power in the output milk-processing market. In particular, the paper identifies market failures in the output milk-processing market in 24 EU member states. The analysis is based on a mark-up model and the application of stochastic frontier methodology. The results show that market failures are pronounced on the EU output milk-processing market. However, the abuse of oligopoly market power is not large on average, despite the fact that we can find significant differences among the countries. The mark-up distribution is skewed toward lower values. That is, the majority of companies are characterized by only a small or almost no degree of market power; however, there are companies (about 10 %) with considerably high oligopoly market power.
title: Lens flare prediction based on measurements with real-time visualization
Creators: name: Walch, Andreas
Publisher: name: TU Wien
Year: 2017
Subjects: subject: Lens Flare
subject: Data-driven Workflow
subject: Real-time Rendering

description: In dieser Diplomarbeit wird eine neue Methode zur Visualisierung von realistischen Linsenreflexionen (Lens Flare) entwickelt. Linsenreflexionen werden durch verhältnismäßig helle Lichtquellen im Bild sichtbar und entstehen durch interne Reflexionen im Linsensystem der Kamera. Das Auftreten von Lens Flare wird meist als störend empfunden, da sie das eigentlich aufgenommene Motiv überblenden und den Gesamtkontrast verringern. In künstlich generierten Bildern werden Lens Flare jedoch oft nachgeahmt, um einen höheren Grad an Realismus zu suggerieren. In der Computergraphik wird für die Generierung von Lens Flare oft das gesamte Linsensystem einer Kamera simuliert. Die exakte Beschaffenheit aller eingebauten optischen Elemente, im speziellen der AntiReflexions-Beschichtungen, sind hingegen meist nur schwer einzusehen und können oft nur geschätzt werden. Die Qualität der Simulation hängt stark von den verfügbaren Beschreibungen ab. Die Simulation ist daher sehr unflexibel. Die in dieser Arbeit entwickelte Visualisierungsmethode ist nicht auf die exakte Beschreibung des Linsensystems einer Kamera angewiesen, da sie direkt mit den aufgenommenen Daten der Kamera arbeitet. Durch Analysieren der aufgenommenen Bilder kann ein Model erstellt werden. Das Model kann für Prognosen von Lens Flare unter verschiedenen Beleuchtungssituationen verwendet werden. Dank GPU-Implementierung ist es für Realtime-Visualisierungen geeignet.
description: Lens flare is a visual phenomenon caused by interreflection of light within a lens system. This effect is often undesired, but it gives rendered images a realistic appearance. In the area of computer graphics, several simulation based approaches have been presented to render lens flare for a given spherical lens system. An accurate model of the lens system and all its components is crucial for a physically reliable result. Since the effect differs from camera to camera, these methods are not flexible, and the internal parameters - especially the anti-reflection coatings - can only be approximated. In this thesis we present a novel workflow for generating physically plausible renderings of lens are phenomena by analyzing the lens flares captured on a camera. Furthermore, our method allows to predict the occurrence of lens flares for a given light setup. This is an often requested feature in light planning applications in order to effciently avoid lens flare prone light positioning. A model with a tight parameter set and a GPU-based rendering method allows our method to be used in real-time applications.
Вплив геометричних параметрів гвинта гранулятора кормів на потужність його приводу
Creators: name: Bratishko, Viacheslav
Publisher: name: figshare
Year: 2020
Subjects: subject: 99901 Agricultural Engineering
subject: FOS: Other engineering and technologies

description: Мета. Аналітичне встановлення впливу параметрів процесу роботи гвинтового гранулятора кормів на витрати потужності на привід гвинта гранулятора. Методи. Інтегральне та диференціальне обчислення, планування факторного експерименту та регресійний аналіз. Результати. В результаті аналітичних досліджень було отримано рівняння регресії у вигляді поліномів другого порядку, що характеризують вплив параметрів процесу роботи гвинтового гранулятора кормів на витрати потужності на привід гвинта гранулятора. Висновки. Встановлено, що математична модель впливу параметрів процесу гранулювання на витрати потужності на привід гвинта гранулятора кормів не має оптимумів для досліджуваного діапазону геометричних параметрів гвинта, зокрема ширини та глибини каналу. Також встановлено, що збільшення інтенсивності зміни глибини та зменшення інтенсивності зміни ширини каналу гвинта призводять до зростання витрат потужності на привід гвинта гранулятора кормів.Ключові слова: гвинт, гранулювання, канал, корми, модель, потужність, тиск.
Братішко В.В. Вплив геометричних параметрів гвинта гранулятора кормів на потужність його приводу // Механізація та електрифікація сільського господарства. – Вип. 3 (102). – Глеваха: ННЦ «ІМЕСГ». – 2016. – С. 106-112.
Why Do Agricultural Producers Exhibit at Bread Basket?
Creators: name: Havlíková, Michaela
name: Kolářová, A.
name: Havlíková, Michaela
name: Kolářová, A.
Publisher: name: Unknown
Year: 2015
Subjects: subject: Food Consumption/Nutrition/Food Safety
subject: Marketing
subject: FOS: Economics and business
subject: Productivity Analysis
subject: Milk
subject: market power
subject: oligopoly
subject: SFA
subject: European Union

description: A literature survey proved that trade shows are important marketing tools, enabling sellers to present and test new products, to monitor their competitors, and to establish personal contacts with customers. The paper extends the current research of trade shows by analyzing exhibitors´ motives for exhibiting. The research is conducted for a traditional international agricultural fair - Bread Basket. Exhibitors, including animal production exhibitors, crop production exhibitors and agriculture technology exhibitors, were offered a list of potential motives for exhibiting and were asked to indicate their agreement (disagreement) on a 5-point Likert scale. Subsequently, a factor analysis revealed four key factors for exhibiting, including searching for information and company development, product development, focus on company surroundings and new market possibilities. Finally, exhibitors were surveyed again in order to choose one of these factors to be the most important one for exhibiting. Logistic regression revealed how the specific variables (NACE classification, year of establishment and frequency of exhibiting) influence the selected factors.
title: Strategic proposal for internationalization of Adrialab d.o.o., a small pharmaceutical company from Croatia
Creators: name: Ćoza Saršon, Dino
Publisher: name: TU Wien
Year: 2017
Subjects: subject: Internationalization motives
subject: International market selection (IMS)
subject: Entry mode selection (EMS)
subject: Small and medium-sized enterprise (SME)
subject: Internationalization motives
subject: International market selection (IMS)
subject: Entry mode selection (EMS)
subject: Small and medium-sized enterprise (SME)

description: The main objective of this thesis is to develop a comprehensive proposal for internationalization of a small spin-off pharmaceutical company Adrialab, d.o.o. As such this thesis focuses on three key areas of the internationalization processes for a small and medium sized company (SME): the motivation behind the decision to internationalize, the international market selection and the mode of entry into selected markets. The author has decided on an international literature review approach to establish key concepts in each area, to discuss such concepts in the context of an SME and to identify and implement some of usually descriptive models developed by international management (IM) scholars in order to make recommendations for Adrialab d.o.o. By mimicking the internationalization motives classification used in IM literature, this thesis establishes Adrialabâ s profitability issues with product lines and distribution channels in the domestic market, the spare manufacturing capacity, the companyâ s vision which includes Southeast European (SEE) countries and spin-off nature of the company as reactive and proactive efficiency seeking motives. Subsequently, the author defines the scope of countries to be assessed in the IMS process and develops and foreign market opportunity index ranking those countries on a combination of economic, population and industry macro indicators as well as selected aggregate measures deemed relevant for consumer expenditure categories targeted by the company portfolio. Company policies, resources and capabilities are evaluated in order to determine feasible equity and non-equity based entry modes while an analysis of competitive and distribution dynamics in each country serves to establish most promising consumer segments and desirable types of intermediaries.
Polarized dust emission of magnetized molecular cloud cores
Creators: name: Goncalves, J.
name: Galli, D.
name: Walmsley, M.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We compute polarization maps for molecular cloud cores modeled as magnetized singular isothermal toroids, under the assumption that the emitting dust grains are aspherical and aligned with the large-scale magnetic field. We show that, depending on the inclination of the toroid with the line-of-sight, the bending of the magnetic field lines resulting from the need to counteract the inward pull of gravity naturally produces a depolarization effect toward the centre of the map. We compute the decrease of polarization degree with increasing intensity for different viewing angles and frequencies, and we show that an outward increasing temperature gradient, as expected in starless cores heated by the external radiation field, enhances the decrease of polarization. We compare our results with recent observations, and we conclude that this geometrical effect, together with other mechanisms of depolarization, may significantly contribute to the decrease of polarization degrees with intensity observed in the majority of molecular cloud cores. Finally, we consider the dependence of the polarization degree on the dust temperature gradient predicted for externally heated clouds, and we briefly comment on the limits of the Chandrasekhar-Fermi formula to estimate the magnetic field strength in molecular cloud cores.
description: 15 pages, 9 figures. Astronomy and Astrophysics, in press
Phosphoinositides and Rho proteins conspire to spatially regulate actin polymerization in motile cells
Creators: name: Dawes, Adriana Tiamae
Publisher: name: University of British Columbia
Year: 2010

description: Cells that move in response to an external signal are crucial for diverse physiological processes such as embryogenesis, neurogenesis, wound healing and immune surveillance. Motile cells are also implicated in disease processes such as rheumatoid arthritis and metastatic cancer. Polymerization of the protein actin, one of the three proteins in a cell’s cytoskeleton, generates the force required to propel a cell in response to a stimulus. The goal of this thesis is to use mathematical modelling to gain a better understanding of how spatial asymmetries in signalling molecules are established and how these signalling molecules direct actin polymerization to produce characteristic actin densities and persistent directed motion. As a first step in understanding the complicated signalling cascades activated by an external signal, I identify modules important for regulation of actin polymerization in motile cells. Based on experimental evidence, I focus on phosphoinositides (PIs), membrane-bound lipids that mediate sensing of external gradients, and Rho proteins, potent regulators of the actin cytoskeleton. I consider models of actin dynamics, Rho proteins and PIs in isolation based on known or observed biochemical events. I then formulate a combined model that simulates actin polymerization dynamics under the regulation of both PIs and Rho proteins. I base all the models proposed here on experimental observations that indicate how PIs and Rho proteins interact with each other and how they affect actin dynamics. The models presented here generate behaviours consistent with experimental observations of both normal and mutant cells and suggest possible mechanisms for recent experimental observations. I show that a model based on biological evidence using reasonable parameter values gives rise to spatial profiles of signalling molecules and actin filaments that are consistent with experimental observations. I find that crosstalk between Rho proteins is required for maintenance of directed motion. I suggest how actin polymerization could be involved in the maintenance of the spatial gradients of PIs and propose experiments to test my hypothesis. These testable hypotheses can be used to guide experiments that could then be used to further refine the models and shed light on the regulatory processes involved in cell motility.
E-trade with Direct Lending and Normalized Money
Creators: name: Ylyin, A. V.
name: Ylyin, V. D.
name: Ylyin, A. V.
name: Ylyin, V. D.
Publisher: name: Unknown
Year: 2015
Subjects: subject: Demand and Price Analysis
subject: Food Consumption/Nutrition/Food Safety
subject: Food Security and Poverty
subject: Research and Development/Tech Change/Emerging Technologies
subject: E-trade with direct lending
subject: normalized money
subject: system of property statuses
subject: normalized economic mechanism
subject: e-service
subject: normalized e-banking

description: The article presents the advanced technology of the normalized commodity-money relations. The technology is considered as updating the model of the normalized economic mechanism. The core of this technology is the e-trade with direct lending where deferred portion of the payment is documented as the buyer's debt to the seller (not to the bank!). The technology of e-trade with direct lending provides the possibility of early repayment of debt amounts to the sellers of priority goods. This repayment is fulfilled by the debt department of the state central bank. Rules of emission of debt amounts are presented in the advanced model of normalized money. The important innovation in normalized e-trade is the rule of obligatory state online certification of transactions.
Numerical simulation of knotted solutions for Maxwell equations
Creators: name: Valverde, Antonio M.
name: Angulo, Luis D.
name: Cabello, Miguel R.
name: García, Salvador G.
name: Omiste, Juan J.
name: Luo, Jianshu
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: In this work, we use the finite differences in time domain (FDTD) numerical method to compute and assess the validity of Hopf solutions, or hopfions, for the electromagnetic field equations. In these solutions, field lines form closed loops characterized by different knot topologies which are preserved during their time evolution. Hopfions have been studied extensively in the past from an analytical perspective but never, to the best of our knowledge, from a numerical approach. The implementation and validation of this technique eases the study of more complex cases of this phenomena; e.g. how these fields could interact with materials (e.g. anisotropic or non-linear), their coupling with other physical systems (e.g. plasmas), and also opens the path on their artificial generation by different means (e.g. antenna arrays or lasers).
description: 6 pages and 9 figures
Photometric Correction for Infrared Sensors
Creators: name: Zhang, Jincheng
name: Brink, Kevin
name: Willis, Andrew R
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Infrared thermography has been widely used in several domains to capture and measure temperature distributions across surfaces and objects. This methodology can be further expanded to 3D applications if the spatial distribution of the temperature distribution is available. Structure from Motion (SfM) is a photometric range imaging technique that makes it possible to obtain 3D renderings from a cloud of 2D images. To explore the possibility of 3D reconstruction via SfM from infrared images, this article proposes a photometric correction model for infrared sensors based on temperature constancy. Photometric correction is accomplished by estimating the scene irradiance as the values from the solution to a differential equation for microbolometer pixel excitation with unknown coefficients and initial conditions. The model was integrated into an SfM framework and experimental evaluations demonstrate the contribution of the photometric correction for improving the estimates of both the camera motion and the scene structure. Further, experiments show that the reconstruction quality from the corrected infrared imagery achieves performance on par with state-of-the-art reconstruction using RGB sensors.