cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Low noise and high linearity LNA based on InGaP/GaAs HBT for 5.3 GHz WLAN
Creators: name: Myoung, Seong-Sik
name: Cheon, Sang-Hoon
name: Yook, Jong-Gwan
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2005
Subjects: ING-INF/01 Elettronica

description: This paper presents a low noise and high linearity LNA based on InGaP/GaAs HBT for 5.3 GHz WLAN. Previous LNAs based on FET series such as HEMT show excellent noise characteristics, but poor linearity. The InGaP/GaAs HBT LNA shows excellent linearity and noise characteristics because of its high base doping concentration. The proposed LNA is fully integrated in area of 0.9 × 0.9 mm2 single chip with high Q spiral inductors and MIM capacitors and biased at current point for optimum noise figure and gain characteristics, furthermore, excellent linearity is achieved. Measured result of the proposed LNA shows 13 dB gain, 2.1 dB noise figure, and excellent linearity in terms of IIP3 of 5.5 dBm. The figure of merit (FOM) defined as a function of the linearity and noise figure is 20.1 dB, which is the best result among previous LNAs.
Avoidance Coupling
Creators: name: Angel, Omer
name: Holroyd, Alexander E.
name: Martin, James
name: Wilson, David B.
name: Winkler, Peter
Publisher: name: arXiv
Year: 2011
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60J10

description: We examine the question of whether a collection of random walks on a graph can be coupled so that they never collide. In particular, we show that on the complete graph on n vertices, with or without loops, there is a Markovian coupling keeping apart Omega(n/log n) random walks, taking turns to move in discrete time.
description: 13 pages, 3 figures
Accidental stability of dark matter
Creators: name: Lavoura, L.
name: Morisi, S.
name: Valle, J. W. F.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We propose that dark matter is stable as a consequence of an accidental Z2 that results from a flavour-symmetry group which is the double-cover group of the symmetry group of one of the regular geometric solids. Although model-dependent, the phenomenology resembles that of a generic Higgs portal dark matter scheme.
description: 12 pages, final version, published in JHEP
Extraction of small signal equivalent circuit model parameters for statistical modeling of HBT using artificial neural
Creators: name: Taher, H.
name: Schreurs, D.
name: Nauwelaers, B.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2005
Subjects: ING-INF/01 Elettronica

description: We found different performances for the same device due to the variations in the process from die to the other on the same wafer or on another one. Yield analysis becomes one of the important tools into commercial Computer Aided Design (CAD) programs. Statistical issues are crucial in yield analysis for microwave circuits. Yield analysis needs accurate 
statistical properties between the parameters of devices’ models to reflect correctly the physical variations. Normally, on the level of the device modeling, the statistical properties between the model parameters like means and standard deviations are noisy by using the known techniques (optimization-based and direct) for extracting the small signal equivalent circuit model parameters of active microwave devices. We introduce how is Artificial Neural Network (ANN)accurate and efficient statistical extraction method for small signal model parameters of Hetero Junction Bipolar Transistor (HBT). Utilizing this methodology provides a robust statistical model for our device.
High gain 110-GHz low noise amplifier MMICs using 120-nm metamorphic HEMTs and  coplanar waveguides
Creators: name: Bessemoulin, A.
name: Fellon, P.
name: Gruenenpuett, J.
name: Massler, H.
name: Reinert, W.
name: Kohn, E.
name: Tessmann, A.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2005
Subjects: ING-INF/01 Elettronica

description: This paper presents the design and performance of 110-GHz low noise amplifier MMICs, based on coplanar technology, and utilizing 120-nm gate-length Metamorphic HEMTs. Thanks to a cascode device, a single-stage amplifier achieves 8-dB small signal gain, with less than 4-dB noise figure at 105 GHz, within a chip size of only 0.725 mm2. The 2- and 3-stage LNAs exhibit small signal gains of more than 15- and 22-dB, respectively over the 100-115 GHz frequency range, with associated measured noise figures of 4.5 dB at 105 GHz; the chip area for these circuits are less than 2- and 3 mm2. To the author’s knowledge, these results are amongst the lowest noise figures reported to date for uniplanar amplifier MMICs operating at these frequencies.
A quasi-isometric embedding theorem for groups
Creators: name: Olshanskii, A.
name: Osin, D.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20F65, 20F69, 20F16, 20E22

description: We show that every group $H$ of at most exponential growth with respect to some left invariant metric admits a bi-Lipschitz embedding into a finitely generated group $G$ such that $G$ is amenable (respectively, solvable, satisfies a non-trivial identity, elementary amenable, of finite decomposition complexity, etc.) whenever $H$ is. We also discuss some applications to compression functions of Lipschitz embeddings into uniformly convex Banach spaces, Følner functions, and elementary classes of amenable groups.
USE OF INFORMATION SYSTEMS AND TECHNOLOGIES BY AGRICULTURAL ENTERPRISES: CURRENT TRENDS AND PROBLEMS
Creators: name: Kysh, L.M.
Publisher: name: Colloquium-journal
Year: 2021
Subjects: ICT
agrarian entities
risk analysis
agriculture
development
preconditions.

description: The main purpose of the study is to determine the benefits and functions of business information systems, which are important support for management and decision-making in agricultural enterprises, using account-ing data. In the short and medium term, agriculture must respond to a number of challenges arising from the final transformation economy, changes in the world economy and access to the common market of the Europe-an Union. The agricultural sector belongs to the main sectors, mainly depending on natural resources. Alt-hough it is usually less important, it plays an indispensable role in the economy. Reproduction processes are typical for duplicate information systems and information technologies. The introduction of information sys-tems that provide competitive advantages in domestic and foreign markets through the effective provision of information is becoming a crucial factor for successful development and sustainable market position. Agricul-tural enterprises are also affected by the trend of computerization. ICTs have a clear positive impact on income growth in developing and developed countries. Risk analysis for agricultural enterprises differs in some way from the same work for other areas of economic activity. In addition to certain general macroeconomic risks, different clusters of other types of risks are inherent in different sectors of the economy. Information technolo-gy and agriculture were considered incompatible ten years ago, but now the scenario has changed. Today, the information system is widely integrated with agriculture. Information technology has always been able to im-prove the quality of agriculture and agricultural products, but requires efficiency and information in every field of agriculture. Process virtualization with the help of cloud computing creates a single modern and com-plex system of agricultural intelligent enterprises supported by ICT. Effective business software is becoming inevitable for agricultural enterprises. Agricultural management systems can process farm data in such a way that the results are organized to address individual decisions for each agricultural enterprise. Agricultural enterprises are facing a growing trend of computerization in all areas of crop, livestock and management. ICTs digitalize the following processes: seed selection, soil preparation, sowing, harvesting, processing, storage and distribution.
A4.8-6 GHz IEEE 802.11a WLAN SiGe-bipolar power amplifier with On-chip output matching
Creators: name: Bakalski, W.
name: Vasylyev, Andriy
name: Simburger, Werner
name: Kall, Marcus
name: Schmid, Alfons
name: Kitlinski, Krzysztof
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2005
Subjects: ING-INF/01 Elettronica

description: A fully integrated 4.8-6 GHz Wireless LAN SiGebipolar power amplifier chip requiring no external components was realized using the small die size of only 1x0.9 mm2. At 1V to 2.4V, the maximum out put power level is 19 dBm (22%PAE) to 26.3 dBm(28.5%PAE) at 5.25GHz with a maximum small signal gain of 33 dB. The maximum average out put power for a maximum 3%Error Vector Magnitude (EVM)is 16 dBm.The PA survives a VSWR of 50.
INFLUENCE OF TECHNOLOGY ELEMENTS ON ZUCCHIN PLANT YIELD INDICES IN THE FOREST-STEPPE OF UKRAINE
Creators: name: Palamarchuk, I.
Publisher: name: Colloquium-journal
Year: 2021
Subjects: zucchini
water-retaining granules
variety
hybrid
yield.

description: The results of research on the influence of variety, hybrid and water-retaining granules on the phenologi-cal phases of development, biometric parameters of plants and yield are presented. The duration of the inter-phase periods was influenced by varietal characteristics and the action of water-retaining granules. The dura-tion of interphase periods with the use of water-retaining granules was reduced. However, the fruiting of zuc-chini with the use of pellets for 15 days was longer compared to the options without pellets. A higher indicator of leaf area was obtained in plants of the Sorcerer variety and the Mostra F1 hybrid with the introduction of water-retaining granules into the pre-sowing cultivation, which is more than the control by 1.1 thousand m2 / ha and 1.2 thousand m2 / ha. Yield increase due to the use of water-retaining Akvod granules in the Chaklun variety and the Mostra F1 hybrid, where the increase relative to control was 9.3 and 8.5 t / ha, respectively.
RLC Parasitic extraction and circuit model optimization for Cu/SiO2-90nm inductance structures
Creators: name: Hegazy, Hazem Mahmoud
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2005
Subjects: ING-INF/01 Elettronica

description: An efficient interconnects modeling and optimization methodology is proposed for multi-GHz clock networkdesign. High frequency effects, including inductance andproximity effects are captured. The results are validatedthrough comparisons with electromagnetic simulationsand measured data taken from a Cu/SiO290nm processtest chip.
Liquid-gas phase transition in hot asymmetric nuclear matter with density-dependent relativistic mean-field models
Creators: name: Zhang, Guang-Hua
name: Jiang, Wei-Zhou
Publisher: name: arXiv
Year: 2012
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The liquid-gas phase transition in hot asymmetric nuclear matter is studied within density-dependent relativistic mean-field models where the density dependence is introduced according to the Brown-Rho scaling and constrained by available data at low densities and empirical properties of nuclear matter. The critical temperature of the liquid-gas phase transition is obtained to be 15.7 MeV in symmetric nuclear matter falling on the lower edge of the small experimental error bars. In hot asymmetric matter, the boundary of the phase-coexistence region is found to be sensitive to the density dependence of the symmetry energy. The critical pressure and the area of phase-coexistence region increases clearly with the softening of the symmetry energy. The critical temperature of hot asymmetric matter separating the gas phase from the LG coexistence phase is found to be higher for the softer symmetry energy.
description: To be published in Phys. Lett. B
Representation stability for the cohomology of the pure string motion groups
Creators: name: Wilson, Jennifer C. H.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Geometric Topology (math.GT)
subject: Algebraic Topology (math.AT)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: The cohomology of the pure string motion group PSigma_n admits a natural action by the hyperoctahedral group W_n. Church and Farb conjectured that for each k > 0, the sequence of degree k rational cohomology groups of PSigma_n is uniformly representation stable with respect to the induced action by W_n, that is, the description of the groups' decompositions into irreducible W_n representations stabilizes for n >> k. We use a characterization of the cohomology groups given by Jensen, McCammond, and Meier to prove this conjecture. Using a transfer argument, we further deduce that the rational cohomology groups of the string motion group vanish in positive degree. We also prove that the subgroup of orientation-preserving string motions, also known as the braid-permutation group, is rationally cohomologically stable in the classical sense.
description: 24 pages, 3 figures
Design of broadband, highly integrated, 20-30 GHz and 35-45 GHz MMIC Up-converters
Creators: name: Convert, Emmanuelle
name: Beasly, Paul
name: Mahon, Simon
name: Dadello, Anna
name: Harvey, James
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2005
Subjects: ING-INF/01 Elettronica

description: The design of broadband, highly integrated up-converters is described.  Two up-converters have been designed to reduce the complexity and cost of broadband millimetre wave systems by integrating a number of functions into a compact MMIC. Broadband performance was achieved for 20-30 GHz and 35-45 GHz with OIP3 exceeding 24 and 15 dBm, respectively; 2xLO leakage better than 3 dBm and excellent gain control.  To our knowledge, this is the highest level of integration achieved for an up-converter at these frequencies.
Bessel bridges decomposition with varying dimension. Applications to finance
Creators: name: Faraud, Gabriel
name: Goutte, Stéphane
Publisher: name: arXiv
Year: 2012
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60G07 60H35 91B70

description: We consider a class of stochastic processes containing the classical and well-studied class of Squared Bessel processes. Our model, however, allows the dimension be a function of the time. We first give some classical results in a larger context where a time-varying drift term can be added. Then in the non-drifted case we extend many results already proven in the case of classical Bessel processes to our context. Our deepest result is a decomposition of the Bridge process associated to this generalized squared Bessel process, much similar to the much celebrated result of J. Pitman and M. Yor. On a more practical point of view, we give a methodology to compute the Laplace transform of additive functionals of our process and the associated bridge. This permits in particular to get directly access to the joint distribution of the value at t of the process and its integral. We finally give some financial applications to illustrate the panel of applications of our results.
A  high  efficiency  GaAs  FET  high  power amplifier  applicable  in  handy  phone equipment
Creators: name: Matsumoto, K.
name: Furutani, N.
name: Fukaya, J.
name: Hirano, Y.
name: Fukuden, N.
name: Ohta, K.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1990
Subjects: ING-INF/01 Elettronica

description: Recenty a handy telephone has been developed and is going to replace a mobile telephone. A handy telephone utilizing batteries uses most of its DC power for its transmitter power amplifier. Therefore the transmitter power amplifier app­licable to a handy telephone has to be high efficiency (low power consumption). Also spurious specification of a telephone needs a stable transmitter power ampli fier. In this paper,we will describe the design philosophy of a high stability and high efficiency GaAs FET power amplifier applicable to a handy telephone. Also we will report the performance of the high stability and high efficiency GaAs FET high power amplifier we developed.
A Quality Function Deployment (QFD) Approach for Bridge Maintenance Management
Creators: name: Bolar, Aman Ahmed
Publisher: name: University of British Columbia
Year: 2014

description: Infrastructure age in the US/Canada are beyond half their expected service life. With billions of dollars invested annually, an increase in number of decisions towards maintenance, rehabilitation and replacement (MRR) activities are expected. Customer (infrastructure user) opinions are sometimes sought when major infrastructure-related decisions are made by conducting surveys, community meetings, etc. However, with consumers becoming more involved in economic, environmental, and social issues related to infrastructure, a process for ensuring customer demands are addressed would be valuable to all stakeholders involved. In this thesis, using bridge as an example, an innovative expert-based decision-framework has been proposed and developed using the Quality Function Deployment (QFD) approach. The framework comprises of three major elements. First a hierarchical evidential reasoning (HER) framework is proposed and developed for condition assessment of bridges by classifying bridge elements into Primary, Secondary, Tertiary and Life Safety-Critical elements. Respective indices are calculated in addition to an overall bridge condition index. The HER framework enables combining different distress indicators and propagating both aleatory/epistemic uncertainties using either Dempster-Shafer or Yager's rule. Importance and reliability factors (collectively termed "credibility factor") are introduced based on bridge element importance and reliability of collected data. Second, QFD implementation has been demonstrated with the following applications: (i) Inspection Prioritization (ii) Decision-Making between Replacement and/ or Rehabilitation scenarios. For inspection prioritization, an Inspection House of Quality is prepared for translating consumer demands (WHATs) into inspection requirements (HOWs) and demonstrated using data developed from Colorado Department of Transportation (CDOT) inspection manual. For the decision-making scenarios, a case study is furnished for a bridge located in Victoria, BC. Finally, the infrastructure-user's expectations are dynamic given the changing economic conditions, technologies, environmental regulations, etc. A hidden Markov model (HMM) is utilized for predicting such dynamic customer response by using probabilities of focus areas that are of interest to the infrastructure-user as hidden parameters. Using the 2005 California Transportation's customer survey, a case study is presented for demonstrating the application. This new expert-based framework has an ability to enhance decision-making by addressing uncertainty in collected inspection data, facilitating customer input into MRR procedures and by predicting customer expectations.
The Energy Transformation Limit Theorem for Gas Flow Systems
Creators: name: Volov, V. T.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences
subject: 80A10, 80A20

description: The limit energy theorem which determines the possibility of transformation the energy flow in power systems in the absence of technical work is investigated and proved for such systems as gas lasers and plasmatrons, chemical gas reactors, vortex tubes, gas-acoustic and other systems, as well as a system of close stars. In the case of the same name ideal gas in the system the maximum ratio of energy conversion effectiveness is linked to the Carnot theorem, which in its turn is connected with the Nernst theorem. However, numerical analyses show that the class of flow energy systems is non-carnot one. The ratio of energy conversion effectiveness depends on the properties of the working medium; a conventional cycle in open-circuit is essentially irreversible. The proved theorem gives a more strongly worded II law of thermodynamics for the selected class of flow energy systems. Implications for astrophysical thermodynamic systems and the theory of a strong shock wave are discussed.
description: 11 pages, 4 figures
Probabilistic assessment of rock slope stability using response surfaces determined from finite element models of geometric realizations
Creators: name: Shamekhi, Seyedeh Elham
Publisher: name: University of British Columbia
Year: 2014

description: A new methodology for probabilistic rock slope stability assessment was developed. This methodology enables the analyst to estimate the probability of failure by incorporating the variability of the geometric parameters such as joint orientation and trace length in the stability analysis. This improves the reliability of any future design, remedial action or risk assessment. Although incorporating the variability of material strength parameters into numerical models is common in geotechnical engineering, similar analysis is very challenging when geometric parameters such as dip, dip direction, and trace length are considered non-deterministically. The challenge is related to mesh generation required for each numerical model as the geometric parameters change, resulting in high computational effort. For practical stability assessment, a representative yet computationally efficient number of realizations or numerical models is required. Therefore, commonly used sampling techniques such as the Monte-Carlo method that generate a large number of slope realizations cannot be used. The new methodology uses the Point Estimate Method to substitute each probabilistic variable by its two point estimates. As the number of probabilistic input parameters increase, the number of point estimates, and accordingly the number of realizations to be modeled, increase exponentially. To compensate for this problem, the methodology uses a ‘design of experiment’ framework to minimize the number of representative realizations needed. While Phase² finite element software is used in this thesis, the methodology is flexible and can be used to increase the efficiency of other numerical tools that require re-meshing to accommodate changes in geometric parameters. The developed methodology was evaluated for two different slope configurations. Analysis of variance was implemented to identify the significant parameters affecting the factor of safety. To estimate the probability of failure, central composite design was used to generate more realizations of the significant parameters and to fit response surfaces to the factor of safety values. A method is presented to select the most accurate response surface to estimate the probability of failure. This response surface can be used to predict the stability behaviour of any arbitrary geometric realization of the slope without the need for further numerical modelling. The sensitivity of the methodology to the selection of the initial point estimates was investigated and was shown to be unbiased.
Relevanz von Qualitätsmerkmalen bei der Krankenhauswahl für den Bürger in Sachsen-Anhalt
Creators: name: Schuldt, Johannes
Publisher: name: Otto-von-Guericke-Universität Magdeburg
Year: 2018
Subjects: subject: Krankenhaus
subject: Bewertung
subject: 362.11

description: Die Möglichkeiten zur Selbstinformation bei der Krankenhauswahl sind heute so gut wie nie, werden aber selten genutzt. Um mehr über die Präferenzen des Bürgers bei der Wahl eines Krankenhauses zur Behandlung zu erfahren, führten wir eine Postbefragung in drei Regionen Sachsen-Anhalts durch. Jedem Befragten wurden nach Mitteilung einer durchzuführenden Behandlung randomisiert acht Vergleiche von jeweils zwei Krankenhausvignetten zugewiesen mit der Bitte um Entscheidung für eines der Häuser zur Behandlung und der Angabe seiner Sicherheit bei dieser Entscheidung. Jede der Vignetten hatte vier Merkmale (Entfernung zum Wohnort, Fallzahl, Qualität der Information über die Behandlung und Komplikationsrate), die in einer positiven oder negativen Ausführung aufgeführt sein konnten. Zusätzlich wurde jeder Befragte gebeten, auch Angaben über persönliche Eigenschaften zu machen. Ca. 40 % der ausgesendeten 1499 Fragebögen konnten in einer Mehrebenenanalyse ausgewertet werden. Es gab eine geordnete Assoziation zwischen der Güte der Vignettenmerkmale und der Wahlchance der zugehörigen Vignette. Den stärksten Effekt hatte dabei die Komplikationsrate, die sich auch am stärksten positiv auf die Entscheidungssicherheit auswirkte. Vermutete kombinierte Effekte der Vignettenmerkmale mit den persönlichen Merkmalen waren meist nicht signifikant. In einer Latent-Class-Analyse stellte sich ebenfalls heraus, dass eine Mehrheit der Befragten die Komplikationsrate als das wichtigste Kriterium ansehen, es aber auch kleinere Gruppen gibt, die eines der anderen Merkmale als wichtiger beurteilen. Die Ergebnisse leisten einen Beitrag zum besseren Verständnis des Wahlverhaltens im stationären Gesundheitssektor und können so helfen, Information zukünftig individualisiert und besser verständlich anzubieten.
Momentum transforms and Laplacians in fractional spaces
Creators: name: Calcagni, Gianluca
name: Nardelli, Giuseppe
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We define an infinite class of unitary transformations between position and momentum fractional spaces, thus generalizing the Fourier transform to a special class of fractal geometries. Each transform diagonalizes a unique Laplacian operator. We also introduce a new version of fractional spaces, where coordinates and momenta span the whole real line. In one topological dimension, these results are extended to more general measures.
description: 32 pages, 1 double figure. v2: conclusions extended; v3: minor typos corrected
A fast and accurate microstrip array model for the analysis of integrated passive components of complex topology
Creators: name: Rizzoli, Vittorio
name: Lipparini, Alessandro
name: Mastri, Franco
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1990
Subjects: ING-INF/01 Elettronica

description: The paper describes a fast and easy to implement approximate model lor coupled rrsicrostrip arrays of arbitrary cross sections. The model is based on the extension of quasi-static computational concepts to the dynamic case, via the introduction of frequency-dependent capacitance models. The results obtained are in good agreement with those provided by more complex computational methods such as the spectral-domain approach.
Global Solutions of the Navier-Stokes Equations for Isentropic Flow with Large External Potential Force
Creators: name: Suen, Anthony
Publisher: name: arXiv
Year: 2011
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35Q30

description: We prove the global-in-time existence of weak solutions to the Navier-Stokes equations of compressible isentropic flow in three space dimensions with adiabatic exponent $γ\ge1$. Initial data and solutions are small in $L^2$ around a non-constant steady state with densities being positive and essentially bounded. No smallness assumption is imposed on the external forces when $γ=1$. A great deal of information about partial regularity and large-time behavior is obtained.
description: 17 pages
Wahrnehmung musikalischer Harmonien bei prälingual ertaubten Kindern und Jugendlichen mit Cochlea-Implantat
Creators: name: Zimmer, Victoria
Publisher: name: Otto-von-Guericke-Universität Magdeburg
Year: 2020
Subjects: subject: Musikalische Akustik
subject: Cochlear-Implantat
subject: Kinderheilkunde
subject: 618.9209789

description: In der vorliegenden Studie wird untersucht, welche Aspekte musikalischer Harmonie von vor dem Spracherwerb (prälingual) vollständig ertaubten Kindern und Jugendlichen mit Cochlea-Implantat-Versorgung wahrgenommen werden. Dabei werden sie mit normalhörenden Kindern und Jugendlichen verglichen. Paarweise dargebotene einzelne Akkorde diskriminieren beide Gruppen ausreichend sicher, jedoch sind die Cochlea-Implantat-Träger weniger zuverlässig als die Normalhörenden. Dabei zeigt sich eine Verbesserung mit zunehmendem Alter für die Cochlea-Implantat-Träger. Zudem bevorzugen die Cochlea-Implantat-Träger sowie die Normalhörenden den Dur-Akkord gegenüber anderen Akkordtypen. Sie zeigen dabei das musikalisch erwartete Präferenzmuster, welches sich in der Intensität seiner Ausprägung zwischen den beiden Gruppen nicht unterscheidet. Hier wird eine positive Altersabhängigkeit mit der Ausprägung des Musters nur für die Normalhörenden gefunden. Bei der Darbietung von kurzen Musikstücken, die entweder auf dem musikalisch erwarteten Dur-Akkord enden oder auf einem dissonanten Akkord, sollen die Probanden angeben, ob das Stück gut oder schlecht endet. Dabei antworten die Cochlea-Implantat-Träger ausnahmslos auf dem Rateniveau, während die Normalhörenden annähernd perfekt antworten. Hier zeigt sich eine starke Altersabhängigkeit für die Normalhörenden-Gruppe. Obwohl sie Freude an Musik haben und mit ihrer Diskriminationsfähigkeit von Akkorden und dem gezeigten Akkordpräferenzmuster die Voraussetzungen zur Wahrnehmung musikalischer Kadenzen erfüllen, können prälingual ertaubte CI-Träger Akkorde im Zusammenhang nicht einordnen. Das zeigt ein fehlendes Verständnis für die musikalische Syntax an.
ECONOMETRIC MODEL FOR ESTIMATING THE IMPACT OF SMALL BUSINESS FACTORS ON CHANGES IN THE SECTORAL STRUCTURE OF AGRICULTURE IN UKRAINE
Creators: name: Potapova, N.A.
Publisher: name: Colloquium-journal
Year: 2021
Subjects: small business patterns
agriculture
econometric model
theoretical estimation
level of neighboring correla-tion relationship.

description: The article covers the processes of forming a system of economic indicators to assess changes in the sec-toral structure of agriculture in Ukraine. The findings of development and approbation of econometric model of estimation of influence of factors of small business patterns on changes in the sectoral structure of agricul-ture of Ukraine for the purpose of its further use in processes of restructuring and state regulation of agricul-ture sector are specified. The evaluation findings are confirmed by the statistics of Ukraine agriculture, the relevant criteria of regression analysis and the high level of neighboring correlation relationship between the factors.
Additional file 1 of Increased susceptibility to intensive care unit-acquired pneumonia in severe COVID-19 patients: a multicentre retrospective cohort study
Creators: name: Llitjos, Jean-François
name: Bredin, Swann
name: Lascarrou, Jean-Baptiste
name: Soumagne, Thibaud
name: Cojocaru, Mariana
name: Leclerc, Maxime
name: Lepetit, Arnaud
name: Gouhier, Albin
name: Charpentier, Julien
name: Piton, Gaël
name: Faron, Matthieu
name: Stoclin, Annabelle
name: Pène, Frédéric
Publisher: name: figshare
Year: 2021
Subjects: subject: Biophysics
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Molecular Biology
subject: Pharmacology
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Information Systems not elsewhere classified
subject: Developmental Biology
subject: Cancer
subject: Infectious Diseases
subject: FOS: Health sciences

description: Additional file 1: Table S1. Determinants of ICU mortality using sub-distribution hazard ratio (SHR) in univariate and multivariate analysis.
Effective String Theory Revisited
Creators: name: Dubovsky, Sergei
name: Flauger, Raphael
name: Gorbenko, Victor
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We revisit the effective field theory of long relativistic strings such as confining flux tubes in QCD. We derive the Polchinski-Strominger interaction by a calculation in static gauge. This interaction implies that a non-critical string which initially oscillates in one direction gets excited in orthogonal directions as well. In static gauge no additional term in the effective action is needed to obtain this effect. It results from a one-loop calculation using the Nambu-Goto action. Non-linearly realized Lorentz symmetry is manifest at all stages in dimensional regularization. We also explain that independent of the number of dimensions non-covariant counterterms have to be added to the action in the commonly used zeta-function regularization.
description: 21 pages, 4 figures, v2: typo corrected, references added, published version
Error distributions for random grid approximations of multidimensional stochastic integrals
Creators: name: Lindberg, Carl
name: Rootzén, Holger
Publisher: name: arXiv
Year: 2011
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60F05, 60H05, 91G20 (Primary) 60G44, 60H35 (Secondary)

description: This paper proves joint convergence of the approximation error for several stochastic integrals with respect to local Brownian semimartingales, for nonequidistant and random grids. The conditions needed for convergence are that the Lebesgue integrals of the integrands tend uniformly to zero and that the squared variation and covariation processes converge. The paper also provides tools which simplify checking these conditions and which extend the range for the results. These results are used to prove an explicit limit theorem for random grid approximations of integrals based on solutions of multidimensional SDEs, and to find ways to "design" and optimize the distribution of the approximation error. As examples we briefly discuss strategies for discrete option hedging.
description: Published in at http://dx.doi.org/10.1214/12-AAP858 the Annals of Applied Probability (http://www.imstat.org/aap/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Analysis of complex passive (M)MIC components using the finite difference time-domain approach
Creators: name: Rittweger, M.
name: Wolff, Ingo
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1990
Subjects: ING-INF/01 Elettronica

description: The analysis of geometrical complex microstrip components including real three-dimensional structures using the finite difference time-domain (FDTD) method is presented. Frequency depen­dent characteristics of these components are received via Fourier transforms of the calculated time-domain results. Comparisons with accurate measurements are used to discuss the advantages and disadvantages  of  the applied  method  as well  as  its  typical  errors.
Dark matter annihilations into two light fermions and one gauge boson: general analysis and antiproton constraints
Creators: name: Garny, Mathias
name: Ibarra, Alejandro
name: Vogl, Stefan
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study in this paper the scenario where the dark matter is constituted by Majorana particles which couple to a light Standard Model fermion and an extra scalar via a Yukawa coupling. In this scenario, the annihilation rate into the light fermions with the mediation of the scalar particle is strongly suppressed by the mass of the fermion. Nevertheless, the helicity suppression is lifted by the associated emission of a gauge boson, yielding annihilation rates which could be large enough to allow the indirect detection of the dark matter particles. We perform a general analysis of this scenario, calculating the annihilation cross section of the processes χχ\rightarrow f\bar f V when the dark matter particle is a SU(2)_L singlet or doublet, f is a lepton or a quark, and V is a photon, a weak gauge boson or a gluon. We point out that the annihilation rate is particularly enhanced when the dark matter particle is degenerate in mass to the intermediate scalar particle, which is a scenario barely constrained by collider searches of exotic charged or colored particles. Lastly, we derive upper limits on the relevant cross sections from the non-observation of an excess in the cosmic antiproton-to-proton ratio measured by PAMELA.
description: 39 pages, 10 figures; v2: minor changes, matches published version; v3: typo corrected
Pathomorphologische Veränderungen der Basalmembranen der kleinen Hirngefäße in einem Tiermodell der sporadischen zerebralen Mikroangiopathie
Creators: name: Held, Friederike
Publisher: name: Otto-von-Guericke-Universität Magdeburg
Year: 2020
Subjects: subject: Hirngefäßkrankheit
subject: Tiermodell
subject: 616.812

description: Unter dem Begriff zerebraler Mikroangiopathien werden heterogene pathomorphologische Besonderheiten subsumiert, die entsprechend des Ausprägungsgrades eine kognitive Einschränkung (vascular cognitive impairment) und im finalen Stadium eine vaskuläre Demenz bedingen können. Gegenstand dieser Arbeit war die Betrachtung von Gefäßwandveränderungen und gefäßwandständigem Amyloid beta (Aβ), unter besonderer Berücksichtigung der vaskulären Drainagewege von Aβ in einem Tiermodell der hypertensiven Arteriopathie (Spontan hypertensive stroke-prone Ratte (SHRSP)) im Vergleich zu Wistar-Kontroll-Ratten. Experimentell gelang der Nachweis verdickter arteriolärer Gefäßwände in der SHRSP. Zudem konnte eine Basalmembrandickenzunahme und beeinträchtigte Integrität der Blut- Hirn-Schranke (BHS) in Kapillaren der SHRSP nachgewiesen werden. Immunhistochemische Färbungen erwiesen eine häufig altersabhängige Koinzidenz endogener Aβ-Ablagerungen an Orten einer beeinträchtigten BHS in der SHRSP. Stereotaktische Aβ-Injektionen offenbarten eine vermehrte Aβ Ablagerung innerhalb der Gefäßwände der SHRSP. Zusammenfassend zeigt das Tiermodell der hypertensiven Arteriopathie altersabhängig ausgeprägte Veränderungen der Gefäßwände und der Strukturen der neurovaskulären Einheit. Diese sind mit der Ablagerung pathologischer Proteine, d.h. von vaskulärem Aβ assoziiert. Folglich muss anhand der vorliegenden Daten ein Zusammenhang zwischen hypertensiver Arteriopathie und einer gestörten Proteindrainage angenommen werden.
Circuit model of coplanar-waveguide (CPW) phase-shifter on GaAs substrates
Creators: name: Cheung, P.
name: Islam, M. S.
name: Neikirk, D. P.
name: Itoh, T.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1990
Subjects: ING-INF/01 Elettronica

description: We present theoretical and experimental data in the frequency spectrum and doping concentration that show the variation of the effective index of refraction neff from a "slow wave" mode into the "lossy dielectric" mode for Coplanar-Waveguides (CPW) fabricated on GaAs substrates. We show that this variation can be modeled by an equivalent transmission line circuit model based on a quasi-static approach using two effective physical parameters (i) the thickness of the lossy layer and (ii) the conductivity.
Circularly symmetric solutions in three-dimensional Teleparallel, f(T) and Maxwell-f(T) gravity
Creators: name: Gonzalez, P. A.
name: Saridakis, Emmanuel N.
name: Vasquez, Yerko
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present teleparallel 3D gravity and we extract circularly symmetric solutions, showing that they coincide with the BTZ and Deser-de-Sitter solutions of standard 3D gravity. However, extending into f(T) 3D gravity, that is considering arbitrary functions of the torsion scalar in the action, we obtain BTZ-like and Deser-de-Sitter-like solutions, corresponding to an effective cosmological constant, without any requirement of the sign of the initial cosmological constant. Finally, extending our analysis incorporating the electromagnetic sector, we show that Maxwell-f(T) gravity accepts deformed charged BTZ-like solutions. Interestingly enough, the deformation in this case brings qualitatively novel terms, contrary to the pure gravitational solutions where the deformation is expressed only through changes in the coefficients. We investigate the singularities and the horizons of the new solutions, and amongst others we show that the cosmic censorship can be violated. Such novel behaviors reveal the new features that the f(T) structure brings in 3D gravity.
description: 33 pages, 6 figures, significant improvement, version published at JHEP
Passiflora cincinnata Masters
Creators: name: Araújo, Diogo
name: Alves, Marccus
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Malpighiales
Passifloraceae
Passiflora
Passiflora cincinnata

description: 73. Passiflora cincinnata Masters
South America (widely distributed) (Nunes & Queiroz 2006).
Selected Voucher:—Zambana, Albuquerque 457 (IPA).
description: Published as part of Araújo, Diogo & Alves, Marccus, 2010, Climbing plants of a fragmented area of lowland Atlantic Forest, Igarassu, Pernambuco (northeastern Brazil), pp. 1-24 in Phytotaxa 8 on page 20, DOI: 10.11646/phytotaxa.8.1.1, http://zenodo.org/record/4893863
Quantum critical behavior in three-dimensional one-band Hubbard model at half filling
Creators: name: Karchev, Naoum
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: One-band Hubbard model with hopping parameter $t$ and Coulomb repulsion $U$ is considered at half filling. By means of the Schwinger bosons and slave Fermions representation of the electron operators and integrating out the spin-singlet Fermi fields an effective Heisenberg model with antiferromagnetic exchange constant is obtained for vectors which identifies the local orientation of the spin of the itinerant electrons. The amplitude of the spin vectors is an effective spin of the itinerant electrons accounting for the fact that some sites, in the ground state, are doubly occupied or empty. Accounting adequately for the magnon-magnon interaction the Néel temperature is calculated. When the ratio $\frac tU$ is small enough ($\frac tU\leq 0.09$) the effective model describes a system of localized electrons. Increasing the ratio increases the density of doubly occupied states which in turn decreases the effective spin and Néel temperature. The phase diagram in plane of temperature $\frac {T_N}{U}$ and parameter $\frac tU$ is presented. The quantum critical point ($T_N=0$) is reached at $\frac tU=0.9$. The magnons in the paramagnetic phase are studied and the contribution of the magnons' fluctuations to the heat capacity is calculated. At Néel temperature the heat capacity has a peak which is suppressed when the system approaches quantum critical point.
description: 9 pages, 7 figurs, published version
Semiclassical Loop Quantum Gravity and Black Hole Thermodynamics
Creators: name: Dasgupta, Arundhati
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this article we explore the origin of black hole thermodynamics using semiclassical states in loop quantum gravity. We re-examine the case of entropy using a density matrix for a coherent state and describe correlations across the horizon due to SU(2) intertwiners. We further show that Hawking radiation is a consequence of a non-Hermitian term in the evolution operator, which is necessary for entropy production or depletion at the horizon. This non-unitary evolution is also rooted in formulations of irreversible physics.
GaAs low cost microwave monolithic circuits for high volume television applications.
Creators: name: Caux, C.
name: Gamand, P.
name: Philippe, P.
name: Pauker, V.
name: Meignant, D.
name: Pertus, M.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1992
Subjects: ING-INF/01 Elettronica

description: Two MMICs have been designed and fabricated for television applications. To be compatible with the needs of the market, low cost approaches have been used to design these circuits. The first one, is an image rejection downconverter fabricated on a 2.4mm2 chip using a 0.5 micron MESFET low cost process. This circuit converts signals in the 10.95 to 12.75GHz band to a lower frequency band (1). The second one is a fully integrated 2GHz downconverter IC fabricated on a 0.9mm2 chip, using an enhancement mode GaAs process. It converts signals in the 0.95GHz to 2GHz band to the UHF band with its internal local oscillator (2). In both cases, original solutions have been used to reduce the cost of the packaged chips .
A study on generalized solution concepts in constraint satisfaction and graph colouring
Creators: name: Zhang, Peng
Publisher: name: University of British Columbia
Year: 2014

description: The concept of super solutions plays a crucial role in using the constraint satisfaction framework to model many AI problems under uncertain, dynamic, or interactive environments. The availability of large-scale, dynamic, uncertain, and networked data sources in a variety of application domains provides a challenge and opportunity for the constraint programming community, and we expect that super solutions will continue to attract a great deal of interest. In the first part of this thesis, we study the probabilistic behaviour of super solutions of random instances of Boolean Satisability (SAT) and Constraint Satisfaction Problems (CSPs). Our analysis focuses on a special type of super solutions, the (1,0)-super solutions. For random k-SAT, we establish the exact threshold of the phase transition of the solution probability for the cases of k = 2 and 3, and we upper and lower bound the threshold of the phase transition for the case of k ≥ 4. For random CSPs, we derive a non-trivial upper bound on the threshold of phase transitions. Graph colouring is one of the most well-studied problems in graph theory. A solution to a graph colouring problem is a colouring of the vertices such that each colour class is a stable set. A relatively new generalization of graph colouring is cograph colouring, where each colour class is a cograph. Cographs are the minimum family of graphs containing a single vertex and are closed under complementation and disjoint union. We define the cogchromatic number of a graph G as the minimum number of colours needed by a cograph colouring of G. Several problems related to cograph colouring are studied in the second part of this thesis, including properties of graphs that have cog-chromatic number 2; computational hardness of deciding and approximating the cog-chromatic number of graphs; and graphs that are critical in terms of cog-chromatic numbers. Several interesting constructions of graphs with extremal properties with respect to cograph colouring are also presented.
RF-on-wafer testable complete MMIC downconverters
Creators: name: Dearn, A.W.
name: Rhodes, M.
name: Lane, A.A.
name: Tofahrn, F.
name: Jansen, R.H.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1992
Subjects: ING-INF/01 Elettronica

description: This paper describes the development of a family of RF-On-Wafer (RFOW) testable monolithic GaAs low noise downconverters (LNC's) for direct broadcast by satellite (DBS) use. The paper concentrates on the lower European band of RF frequency range 10.95 - 11.7 GHz, with 0.95 - 1.7 GHz IF. A relatively large and narrow­band prototype LNC was originally designed and tested. This was then developed into a full lower-band, more user-friendly design with less than 4mm2 GaAs chip area. Conversion gains of 30dB and noise figures below 7dB have been achieved.