cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
InP-based monolithic integrated PIN diode switches for mm-wave applications
Creators: name: Ziegler, Volker
name: Berg, Michael
name: Tobler, Hans
name: Wolk, Claus
name: Deufel, Reinhard
name: Dickmann, Jürgen
name: Trasser, Andreas
name: Schumacher, Hermann
name: Alekseev, Egor
name: Pavlidis, Dimitris
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1998
Subjects: ING-INF/01 Elettronica

description: We report on the measured performance of monolithic integrated mm-wave switching circuits which operate at Ka-Band. V-Band and W-Band as well as on a technology for multi-functional MMICs. The coplanar switches are using high-performance InGaAs PIN diodes as active switching elements. The focus of the illustrated measurement results is on the characteristics of the W-Band switches. The SPST (single-pole single-throw) switches exhibit a low minimum insertion loss of 0.66 dB (1.17 dB) at 85 GHz (84 GHz) with an extremely high corresponding isolation of 29.2 dB (24.5 dB). Even under extremely low DC-power consumption conditions of 0.95 mW (0.8 mW), the switches demonstrated impressive isolations of 23.7 dB (20.7 dB). Excellent mm-wave performance is also achieved with the 94 GHz SPDT (single-pole double-throw) switch. An insertion loss as low as 1.4 dB in transmit mode and 1.8 dB at 96 GHz in receive mode is obtained. A very high isolation value greater than 40 dB is observed. Furthermore, we are developing a heterointegration technology for multi-functional MMICs and present a first comparison between heterointegrated SPST switches (PIN + HFET layer structure) and the normal SPST switches (only PIN structure).
Substrate und Bedeutung der Protein-Phosphatase 5 im Säugetierherzen
Creators: name: Werner, Franziska
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2010
Subjects: subject: Physiologische Chemie
subject: Phosphoproteinphosphatase
subject: Online-Publikation
subject: Hochschulschrift
subject: 573.174755319
subject: 572

description: Proteinphosphatase 5 (PP5) ist eine ubiquitär vorkommende, durch Arachidonsäure stimulierbare Protein-Phosphatase, deren physiologische Funktionen weitgehend unbekannt sind. In dieser Arbeit wurden erstmals potentielle Substrate der PP5 im Herz ermittelt und mit einer Mg2+-abhängigen ebenfalls durch Arachidonsäure stimulierbaren Phosphatase, der Proteinphosphatase 2Cβ, verglichen. Die Bedeutung der PP5 im Säugetierherzen wurde an einer transgenen Mauslinie mit herzspezifischer Überexpression der PP5 unter Basalbedingung und nach β-adrenerger Stimulierung mit Isoprenalin untersucht. Transgene Tiere zeigten eine schlechtere Herzfunktion als Wildtypen. Die Bedeutung der PP5 wurde außerdem im Modell der Lipopolysaccharid-induzierten Sepsis ermittelt. Es wurde die Proteinexpression und Phosphataseaktivität der PP5 im menschlichen Herz untersucht. Hier gab es keine Unterschiede in der PP5-Proteinexpression in linken Ventrikeln herzgesunder und herzkranker Menschen.
Exploring students' mathematical sense-making through non-routine problems : visualization, gesture, and affect.
Creators: name: Medina, Myron
Publisher: name: University of British Columbia
Year: 2013

description: This study explores graduate students’ mathematical sense making through non-routine problems. I consider visualization, gesture and affect as integral cognitive aspects in the solution processes of participants. To analyze them, I introduce a suitable model, a think-aloud protocol coupled with meta-cognitive prompts. The study gives details of the solving of given non-routine problems by participants. It allows focusing on the relationship between visualization and gesture in conjunction with affective states in the process of sense making when solving non-routine problems in the absence of pre-determined mathematical procedures or algorithms. Visual imagery, gesture and particularly affective issues played a role in the solving processes of graduate students. As such these resources are seen as major ingredients in mathematics teaching and learning.
The power amplifier rat race for digital mobilecom applications
Creators: name: Rocchi, Marc
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1998
Subjects: ING-INF/01 Elettronica

description: With more than 100M cellular and cordless phones already this year, the digital mobilecom market is booming rapidly attracting a lot of interest from CMOS and BiCMOS IC suppliers wanting to grab a big share of it. Yet, the high power amplifier (> 1 W) in the transmit chain, because it cannot easily be integrated in mainstream Si processes, remains a battlefield for GaAs and Si technologies with no clear winner so far. Power added efficiency at high and low power levels and low supply voltage, device count, cost, reliability as well as ease of power control are the key parameters which are governing the power amplifier rat race.
Mascarena Arrow 1919
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Mascarena

description: Mascarena Arrow, 1919
[1 species].
Type species Lachnosterna rodriguezi Waterhouse, 1876, by monotypy.
description: Published as part of Allsopp, Peter G. & Schoolmeesters, Paul, 2024, All genera of the world: Subfamilies Prototroginae, Cretoscarabaeinae, Dynamopodinae, Electrorubesopsinae, Phaenomeridinae, Orphninae, Allidiostomatinae, Aclopinae, Lichniinae, Melolonthinae, Oncerinae, Podolasiinae, Sericinae, Sericoidinae (Animalia: Arthropoda: Insecta: Coleoptera: Scarabaeidae), pp. 104-175 in Megataxa 12 (1) on page 131, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
GaAs RFICs For mobile telephone applications -- A review
Creators: name: Pengelly, Raymond S.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1998
Subjects: ING-INF/01 Elettronica

description: By far the single largest application for GaAs RFICs in commercial/consumer platforms is in mobile telephone handsets covering several standards such as analog AMPS, digital PCS TDMA and CDMA, Japanese PHS, European GSM, DCS1800 and DECT. However, a considerable number of technologies are potentially availabie for RFIC designs such as Si BiCMOS, Si LDMOS, SiGe, GaAs MESFET, GaAs pHEMT, AIGaAs and InGaP HBT. After a brief review of competing technologies, emphasis in this paper is placed on describing a number of examples of GaAs RFiC designs used in present telephones concentrating on the highest performance parts required in PCS and dual-band CDMA platforms. Integration of receive and transmit functions, providing substantial area reduction and integration improvement for next generation platform applications, will be described such as a PCS transmitter module containing GaAs upconverter, driver amplifier and power amplifier ICs. Technologies are compared for future higher levels of integration allowing the production of "one-chip radios".
GaAs power amplifier MMIC for GSM single and multiband radios
Creators: name: Friedrich, Hans P.
name: Weisgerber, Andreas
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1998
Subjects: ING-INF/01 Elettronica

description: Power Amplifier MMICs based on GaAs have gained a significant market share in cellular telephones because of their superior performance at low supply voltages. This article presents the new GaAs power amplifier MMIC CGY98 based on MESFET technology for single and dual band radios in ultra small package.
Truth-value semantics and functional extensions for classical logic of partial terms based on equality
Creators: name: Parlamento, Franco
Publisher: name: arXiv
Year: 2011
Subjects: subject: Logic (math.LO)
subject: FOS: Mathematics
subject: 03B20

description: We develop a bottom-up approach to truth-value semantics for classical logic of partial terms based on equality and apply it to prove the conservativity of the addition of partial description and partial selection functions, independently of any strictness assumption.
description: 15 pages, to appear in the Notre Dame Journal of Formal Logic
Endogeneous outsourcing and vertical integration with process R&D
Creators: name: Rossini, Gianpaolo
name: Lambertini, Luca
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: SECS-P/01 Economia politica

description: According to received literature, vertical integration may enjoy a social superiority due to the ability to internalize the externality that goes back from the pricing policy of the downstream firm to the profits of the upstream firm. We challenge this result introducing process R&D in a broad set of scenarios with vertically symmetric and asymmetric R&D commitments. In some of these contexts a reversed sequence of socially desirable vertical arrangements arises, making out-sourcing superior. In other circumstances disintegration is privately superior but socially in efficient. Finally, vertically asymmetric costs of R&D are considered to allow for a wider range of applications.
The skill bias effect of technological and organisational change: evidence and policy implications
Creators: name: Piva, Mariacristina
name: Santarelli, Enrico
name: Vivarelli, Marco
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: SECS-P/02 Politica economica

description: Previous empirical literature has shown that technological change can be considered the main cause of the skill bias (increase in the number of high skilled workers) exhibited by manufacturing employment in developed countries over the last decades. However, recent papers have also introduced the "Skill Biased Organisational Change" hypothesis. We estimate a SUR model for a sample of 400 Italian manufacturing firms, showing that the upskilling is more a function of the reorganisational strategy than a consequence of technological change alone. Moreover, some evidence of superadditive effects emerges, consistently with the theoretical hypothesis of a coevolution of technology and organisation.
Additional file 1 of PS-341 alleviates chronic low-grade inflammation and improves insulin sensitivity through the inhibition of TM4 (UBAC2) degradation
Creators: name: Chen, Lili
name: Ye, Kuanping
name: Feng, Xiaocheng
name: Li, Lianxi
name: Li, Qin
name: Huang, Ying
name: Wang, Xuanchun
name: Li, Rumei
name: Hu, Cheng
name: Yang, Zhen
name: Lu, Bin
name: Yang, Yehong
name: Wen, Jie
name: Zhang, Zhaoyun
name: He, Min
name: Wang, Qinghua
name: Zhou, Wenbai
name: Li, Yintao
name: Liu, Naijia
name: Huang, Jinya
name: Shen, Qiwei
name: Yao, Qiyuan
name: Hu, Renming
Publisher: name: figshare
Year: 2021
Subjects: subject: Biochemistry
subject: Space Science
subject: Genetics
subject: FOS: Biological sciences
subject: Physiology
subject: Chemical Sciences not elsewhere classified
subject: Astronomical and Space Sciences not elsewhere classified
subject: Immunology
subject: FOS: Clinical medicine
subject: Developmental Biology

description: Additional file 1. Supplementary methods and results.
Toric ideals of finite graphs and adjacent 2-minors
Creators: name: Ohsugi, Hidefumi
name: Hibi, Takayuki
Publisher: name: arXiv
Year: 2011
Subjects: subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics
subject: 13F20

description: We study the problem when an ideal generated by adjacent 2-minors is the toric ideal of a finite graph.
description: 5 pages, 2 figures, Corrected typos, Added explanations and references
H3K4 Demethylierung durch Histon-Demethylase SU(VAR)3-3 kontrolliert die Heterochromatinbildung in Drosophila melanogaster
Creators: name: Rudolph, Thomas
Publisher: name: Niedersächsische Staats- und Universitätsbibliothek
Year: 2007
Subjects: subject: Elektronische Publikation
subject: Hochschulschrift
subject: Online-Publikation
subject: Zsfassung in engl. Sprache
subject: 570
subject: 572.815774

description: Die genau abgestimmte Funktion von Histon-Methyltransferasen (HMTasen) und Histon-Demethylasen ist verantwortlich für die epigenetisch korrekte Etablierung von Chromatindomänen. SU(VAR)3-3 ist das Drosophila Homologe des humanen LSD1 und entfernt selektiv H3K4 me1 und me2. Diese Demethylierung ermöglicht eine heterochromatische H3K9 Methylierung durch SU(VAR)3-9. Su(var)3-3 Allele sind Suppressoren für heterochromatisches Gensilencing und zeigen eine erhöhte H3K4 Dimethylierung. Diese Erhöhung führt zu einer verringerten H3K9 Methylierung im perizentrischen Heterochromatin. SU(VAR)3-3 zeigt eine Kolokalisation mit H3K4 Dimethylierung in den Interbanden der polytänen Speicheldrüsenchromosomen. Im Embryo ist das Protein während der Furchungsteilungen ubiquitär verteilt. Zum Zeitpunkt des Kernteilungszyklus 14 ist eine Anreicherung von SU(VAR)3-3 im prospektiven Heterochromatin zu beobachten. In Embryonen von Su(var)3-3/+ Weibchen ist eine Akkumulation der H3K4 Dimethylierung in den primordialen Keimbahnzellen zu sehen, welches zu einer Reduktion der H3K9 Di- und Trimethylierung führt. Diese Daten deuten auf eine Funktion der Demethylase SU(VAR)3-3 in der frühen Embryonalentwicklung von Drosophila melanogaster hin. Das Protein definiert zu diesem Zeitpunkt eu- und heterochromatische Chromatindomänen. Die Entfernung transkriptionsaktiver Modifikationen durch SU(VAR)3-3 stellt eine Vorraussetzung für die Etablierung von Heterochromatin dar.
description: Epigenetic indexing of chromatin domains by histone lysine methylation requires the balanced coordination of methyltransferase (HMTase) and demethylase activities. SU(VAR)3-3, the Drosophila homolog of the human LSD1 amine oxidase, selectively demethylates H3K4me2 and H3K4me1, and facilitates the subsequent methylation of H3K9 by SU(VAR)3-9. Su(var)3-3 mutations suppress heterochromatic gene silencing and display elevated levels of H3K4me2 that prevent the full extension of H3K9me2 at pericentric heterochromatin. SU(VAR)3-3 colocalizes with H3K4me2 in interband regions, and is particularly abundant during embryogenesis and in syncytial blastoderm, where it appears concentrated at prospective heterochromatin during developmental cycle 14. In embryos of Su(var)3-3/+ females, H3K4me2 accumulates in primordial germ cells, and the deregulated expansion of H3K4me2 antagonizes heterochromatic H3K9me2 and me3 at the blastoderm stage. These data indicate an early developmental function for the SU(VAR)3-3 demethylase in controlling the definition of euchromatic and heterochromatic domains and reveal a hierarchy, in which SU(VAR)3-3-mediated removal of activating histone marks are a prerequisite for subsequent heterochromatin formation by repressive H3K9 methylation.
Quality of Service in the Congestible Internet: a Differential Game with Capacity Investments
Creators: name: Colombo, Luca
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: SECS-P/01 Economia politica

description: We take a differential game approach to study the dynamic market interaction between two Internet Service Providers (ISP) offering services characterized by different quality levels.Web congestion is accounted for,consisting in the fact that for a given network capacity, i.e. for given amount of resources to be shared, the quality of services decreases with the number of customers. ISP firms, by accumulating capital,may invest in order to increase their own network capacity. In contrast with the acquired wisdom, we prove that there exists an admissible intertemporal parameters subset wherein the low quality firm performs better than the high quality firm in terms of equilibrium profits. Furthermore, we establish conditions under which the low quality firm becomes a natural monopolist. Finally,we prove that consumers may be better off under cooperative rather than under non cooperative play.
Skalierung der Signalmodenanzahl in Erbium-dotierten Faserverstärkern für optische Übertragungssysteme mit Modenmultiplex
Creators: name: Jeurink, Steffen
Publisher: name: TU Dortmund
Year: 2021
Subjects: subject: Modenmultiplex
subject: Raummultiplex
subject: Optische Übertragungstechnik
subject: 620
subject: Übertragungstechnik
subject: Internet

description: Studien zur Internetnutzung zeigen, dass in den vergangenen Jahrzehnten ein exponentieller Anstieg des globalen Datenverkehrs stattgefunden hat und dass dieser sich in den nächsten Jahren fortsetzen wird. In der Vergangenheit konnten optische Weitverkehrs-Übertragungssysteme mit dem steigendem Bedarf skalieren und gleichzeitig die Kosten pro übertragenem Bit gesenkt werden. In absehbarer Zeit werden die heute verwendeten Einmodensysteme jedoch die theoretisch maximale Übertragungskapazität pro Faser erreichen. Eine weitere Steigerung der gesamten Übertragungskapazität ist dann nur durch den parallelen Betrieb mehrerer solcher Systeme möglich. In der Forschung wird nach Möglichkeiten gesucht, die eine Senkung der Kosten pro Bit durch eine Steigerung der Übertragungskapazität pro Faser, vergleichbar mit denen der Einmodensysteme in den letzten Jahrzehnten, versprechen. Raummultiplexverfahren bieten ein solches Potenzial durch Ausnutzung des letzten verbliebenen Freiheitsgrades zum Signalmultiplex: des Raumes. Ein Raummultiplexverfahren kann sich wirtschaftlich nur durchsetzen, wenn es eine Steigerung der Übertragungskapazität um zwei Größenordnungen erlaubt und mit bestehenden Multiplexverfahren, wie dem Wellenlängenmultiplex, gemeinsam betrieben werden kann. Raummultiplex mit Vielmodenfasern ist ein vielversprechendes Verfahren, das diesen Anforderungen entspricht. Für das gewählte Multiplexverfahren sollte ein Verstärker verfügbar sein, mit dem alle Signalkanäle simultan verstärkt werden können. In dieser Arbeit werden Erbium-dotierte Faserverstärker für optische Übertragungssysteme mit Modenmultiplex auf die genannten Kriterien hin untersucht. Das Hauptproblem bei der Verwendung Erbium-dotierter Faserverstärker für Vielmodenfasern liegt in der Erzielung identischer Signalgewinne für alle Signalmoden. Unterschiedliche Gewinne für verschiedene Signalmoden können zu Verschlechterungen der Signalqualität führen. Mit den durchgeführten Arbeiten konnte gezeigt werden, dass sich Erbium-dotierte Faserverstärker eignen, um mehr als 100 Signalmoden in Kombination mit bestehenden Multiplexverfahren in zukünftigen Übertragungssystemen mit Modenmultiplex simultan zu verstärken. Verschiedene Verfahren zur Angleichung der Gewinne aller räumlichen Kanäle, durch Anpassung der Pumpleistung, der radialen Verteilung der Erbium-Dotierung im Faserkern sowie unter Ausnutzung von Sättigungseffekten, werden vorgestellt. Außerdem werden Szenarien untersucht, bei denen die Anzahl der räumlichen Kanäle zur Laufzeit erhöht wird, um eine Steigerung der Übertragungskapazität zu erreichen. Insgesamt zeigt diese Arbeit, dass die Anzahl der nutzbaren räumlichen Kanäle zukünftiger Modenmultiplexsysteme vermutlich nicht durch die Verwendung von optischen Verstärkern limitiert wird.
The Effects of Minimum Quality Standards on Product Quality
Creators: name: Garella, Paolo G.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: SECS-P/01 Economia politica

description: In a model where two firms’ products are di¤erentiated both, horizontally and vertically, introduction of a quality standard affects equilibrium quality levels of both firms. The effects, furthermore, depend upon consumers being or not perfectly informed about qualities. Qualities are strategic substitutes and under perfect information only non-innocuous standards, i.e. above the lowest quality in an unregulated equilibrium, change the equilibrium. However, the average quality in the market may go down due to the standard, and total consumers welfare decrease. Under uncertainty, even apparently innocuous standards, below the lowest unregulated equilibrium quality, may alter the equilibrium quality choices.
The Twin Effects of Globalization
Creators: name: Daveri, Francesco
name: Manasse, Paolo
name: Serra, Danila
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: SECS-P/01 Economia politica

description: Employees of "globalized" firms face a riskier, but potentially more rewarding, menu of labor market outcomes. We document this neglected trade-off globalization for a sample of Indian manufacturing firms. On the one hand, the employees of firms subject to foreign competition face a more uncertain stream of earnings and riskier employment prospects. On the other, they enjoy a more rapid career and/or have more opportunities to train and upgrade their skills. The negative uncertainty costs and the positive incentive effects of globalization are thus twin to each other. Concentrating on just one side of the coin gives a misleading picture of globalization.
Modifizierte Polypropylene durch Metallocen-Katalyse
Creators: name: Köller, Frank
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 1999
Subjects: Elektronische Publikation

description: Die Metallocen-katalysierte Copolymerisation von Propen mit 1-Olefinen gestattet eine weitreichende Modifizierung der Materialeigenschaften von Polypropylen von Thermoplasten bis hin zu Elastomeren. Die unterschiedlichen Einflüsse des Einbaus von 1-Octen und 4-Methylpent-1-en auf die molekularen, thermischen und mechanischen Produkteigenschaften werden gegenübergestellt. Das Copolymerisationsverhalten eines isospezifischen und eines aspezifischen Metallocen-Katalysators werden verglichen. Weiterhin wird die Synthese von Polypropylen-Pfropfcopolymeren mit einheitlicher Polystyren-seitenkettenlänge und deren Einsatz als Phasenvermittler in Polypropylen/ Polystyren-Blends beschrieben. Die Makromonomer-Methode erwies sich als effiziente Synthesevariante für die Darstellung von Polypropylen-graft-Polystyren Copolymeren mit definierter Seitenkettenlänge. Es wurden eine Vielzahl von Polypropylen-graft-Polystyren Copolymeren mit variabler Seiten-kettenlänge und Pfropfastzahl durch Metallocen-katalysierte Copolymerisation von Propen und Alpha-norbornenyl-Polystyren Makromonomeren hergestellt. Die dargestellten Pfropfcopolymere, stellen effektive Phasenvermittler für Polypropylen/ Polystyren-Blends dar, die sich in ihrer Wirkung hinsichtlich der Pfropfastlänge und Pfropfastanzahl unterscheiden.
description: The metallocene catalyzed synthesis of propene/1-olefin copolymers is an important key to polymeric materials with a great variety of properties ranging from thermoplastics to elastomers. The different influence of the incorporation of 1-octene and 4-methylpentene-1 in the growing polypropene chain on the molecular, thermal and mechanical properties of the resulting copolymers is shown in detail. The copolymerization behavior of an isospecific and an aspecific metallocene catalyst for manufacturing propene/1-olefine copolymers is compared. A second subject of this work was the synthesis of polypropene graft copolymers with uniform side chain length and their use as compatibilizers in polypropene/polystyrene blends. In order to prepare well-defined graft copolymers the macromonomer route was chosen in which polystyrene side chains prepared separately using living anionic polymerization's technique with a functional initiator. The following metallocene catalyzed copolymerization of Alpha-norbornenyl-polystyrene macromonomers with propene leads to graft structures with various polystyrene content. The influence of these polypropene-graft-polystyrene copolymers on the mechanical properties and on the morphology of the polypropene/polystyrene blends was investigated. As a result a dependency of the compatibilizing efficiency on the side chain length and the side chain number was found.
Working on the Train? The Role of Technical Progress and rade in Explaining Wage Differentials in Italian Firms
Creators: name: Manasse, Paolo
name: Stanca, Luca
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: SECS-P/10 Organizzazione aziendale

description: This paper presents firm-level evidence on the dynamics of the relative demand for non-manual workers in Italian manufacturing during the 1990s. The analysis provides a number of interesting results. First, the rise within firms in the share of non manual workers in both employment and hours worked (within-firm skill upgrading) is the main determinant of the increase in the relative demand for skilled workers. By contrast, demand changes associated to trade have mitigated such a rise by shifting employment away from skill-intensive firms. Second, while the relative number of hours worked by skilled workers within firms has risen, the hourly wage premium has fallen. Third, within-firm skill upgrading is strongly and significantly related to investment in computers and R&D. Fourth, we find that technical progress has raised the relative productivity of skilled workers (the skill-bias of technical progress is positive). Finally we show that the standard approach that measures annual, rather than hourly relative wages, produces a downward bias in the estimate of the skill-bias of technical progress.
Brain Drain and Fiscal Competition. A theoretical model for the Europe.
Creators: name: Giannoccolo, Pierpaolo
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: SECS-P/03 Scienza delle finanze

description: In this paper we study Brain Drain (BD) and Fiscal Competition (FC) in a unified framework for the European Union (EU) specific context. Potential mobility of educated workers can increase the degree of FC through taxation or the provision of public education. An increase in FC can be caused by competition among different jurisdictions that aim to attract educated workers. When the importance of FC increases, then the European States may employ FC as a new policy tool. First, we analyze FC and BD with reference to EU regions. In this instance, the EU may find incentive to control the interactions between BD and FC in order to coordinate fiscal policies and/or the provision of public goods as education. Second, we furthermore consider the entry of new state inside the EU. The absence of coordination implies that, in addition to the FC, a "migration competition" may be generated in EU, where the region inside the union try to attract educated workers of the new entry. We derive the conditions which BD leads to  decrease (increase) in welfare and growth for new entry country.
On the number of cyclic subgroups of a finite abelian group
Creators: name: Tóth, László
Publisher: name: arXiv
Year: 2012
Subjects: subject: Group Theory (math.GR)
subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 20K01, 20K27 (Primary) 11A25 (Secondary)

description: We prove by using simple number-theoretic arguments formulae concerning the number of elements of a fixed order and the number of cyclic subgroups of a direct product of several finite cyclic groups. We point out that certain multiplicative properties of related counting functions for finite Abelian groups are immediate consequences of these formulae.
description: 6 pages, revised, short form
Formulation of gauge theories on transitive Lie algebroids
Creators: name: Fournel, Cédric
name: Lazzarini, Serge
name: Masson, Thierry
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Differential Geometry (math.DG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: In this paper we introduce and study some mathematical structures on top of transitive Lie algebroids in order to formulate gauge theories in terms of generalized connections and their curvature: metrics, Hodge star operator and integration along the algebraic part of the transitive Lie algebroid (its kernel). Explicit action functionals are given in terms of global objects and in terms of their local description as well. We investigate applications of these constructions to Atiyah Lie algebroids and to derivations on a vector bundle. The obtained gauge theories are discussed with respect to ordinary and to similar non-commutative gauge theories.
description: 30 pages. Final version. arXiv admin note: substantial text overlap with arXiv:1109.4282
Exploring the trade-off between fidelity- and time-optimal control of quantum unitary transformations
Creators: name: Tibbetts, Katharine W. Moore
name: Brif, Constantin
name: Grace, Matthew D.
name: Donovan, Ashley
name: Hocker, David L.
name: Ho, Tak-San
name: Wu, Rebing
name: Rabitz, Herschel
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Generating a unitary transformation in the shortest possible time is of practical importance to quantum information processing because it helps to reduce decoherence effects and improve robustness to additive control field noise. Many analytical and numerical studies have identified the minimum time necessary to implement a variety of quantum gates on coupled-spin qubit systems. This work focuses on exploring the Pareto front that quantifies the trade-off between the competitive objectives of maximizing the gate fidelity $\mathcal{F}$ and minimizing the control time $T$. In order to identify the critical time $T^{\ast}$, below which the target transformation is not reachable, as well as to determine the associated Pareto front, we introduce a numerical method of Pareto front tracking (PFT). We consider closed two- and multi-qubit systems with constant inter-qubit coupling strengths and each individual qubit controlled by a separate time-dependent external field. Our analysis demonstrates that unit fidelity (to a desired numerical accuracy) can be achieved at any $T \geq T^{\ast}$ in most cases. However, the optimization search effort rises superexponentially as $T$ decreases and approaches $T^{\ast}$. Furthermore, a small decrease in control time incurs a significant penalty in fidelity for $T < T^{\ast}$, indicating that it is generally undesirable to operate below the critical time. We investigate the dependence of the critical time $T^{\ast}$ on the coupling strength between qubits and the target gate transformation. Practical consequences of these findings for laboratory implementation of quantum gates are discussed.
description: 23 pages, 11 figures
Medeotrogus Keith 2001
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Medeotrogus

description: Medeotrogus Keith, 2001
[4 species].
Type species Medeotrogus linnavuorii Keith, 2001 (= Medeotrogus fissus (Burmeister, 1855)), by original designation.
description: Published as part of Allsopp, Peter G. & Schoolmeesters, Paul, 2024, All genera of the world: Subfamilies Prototroginae, Cretoscarabaeinae, Dynamopodinae, Electrorubesopsinae, Phaenomeridinae, Orphninae, Allidiostomatinae, Aclopinae, Lichniinae, Melolonthinae, Oncerinae, Podolasiinae, Sericinae, Sericoidinae (Animalia: Arthropoda: Insecta: Coleoptera: Scarabaeidae), pp. 104-175 in Megataxa 12 (1) on page 131, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
Mentor-apprenticeship roles in a selection of young adult novels
Creators: name: George, Claire Elizabeth
Publisher: name: University of British Columbia
Year: 2013

description: The apprenticeship model has been historically dominant in the education systems of various cultures in the last three thousand years. As a result, many children’s and Young Adult novels, especially in the genres of historical fiction and fantasy, incorporate master and apprentice themes. With this in mind, I seek to analyze the teaching depicted in two YA novels based on apprenticeship: The Last Apprentice and The Ranger’s Apprentice. Due to the international popularity of these novels, many children and young adults worldwide are exposed to the books’ messages about teaching and about education. Informed by current educational research, I have developed a best practice lens including four aspects: the teacher as an individual, curricular scope, instructional practices, and assessment. This thesis examines the teaching practice of the masters in each novel using this best practice lens. I found that while not always perfect, the two masters follow many elements of best practice teaching, resulting in student/apprentice success.
Scalar-tensor theories, trace anomalies and the QCD-frame
Creators: name: Nitti, Francesco
name: Piazza, Federico
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider the quantum effects of matter fields in scalar-tensor theories and clarify the role of trace anomaly when switching between conformally related `frames'. We exploit the property that the couplings between the scalar and the gauge fields are not frame-invariant in order to define a `QCD-frame', where the scalar is not coupled to the gluons. We show that this frame is a natural generalization of the `Jordan frame' in the case of non-metric theories and that it is particularly convenient for gravitational phenomenology: test bodies have trajectories that are as close as possible to geodesics with respect to such a metric and equivalence principle violations are directly proportional to the scalar coupling parameters written in this frame. We show how RG flow and decoupling work in metric and non-metric theories. RG-running commutes with the operation of switching between frames at different scales. When only matter loops are considered, our analysis confirms that metricity is stable under radiative corrections and shows that approximate metricity is natural in a technical sense.
description: 10 pages. Minor changes to the main text, appendix added. To appear on PRD
New trends of nonlinear modeling for microwave devices in a circuit/system environment
Creators: name: Barataud, D.
name: Campovecchio, M.
name: Teyssier, J.P.
name: Nebus, J.M.
name: Quéré, R.
name: Obregon, J.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1998
Subjects: ING-INF/01 Elettronica

description: Specific pulsed measurement techniques are presented to discriminate thermal and trapping effects during the modeling process. An electrothermal modeling approach, a new trap model and a specific nonlinear distributed topology are proposed. Moreover, a new time domain load-pull set-up has been developed to aid in the nonlinear model validation under one and two-tone excitations.
Accurate nonlinear resistive FET modeling for IMD calculations
Creators: name: García, José A.
name: Pedro, José C.
name: Carvalho, Nuno B.
name: Mediavilla, Angel
name: Tazón, Antonio
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1998
Subjects: ING-INF/01 Elettronica

description: This work discusses the nonlinear modeling procedures required for intermodulation distortion (IMD) calculations of MESFETs biased in the resistive (linear) region. An automatic full two-sided characterization of Ids(Vgs, Vds) is compared against the previously published extraction of Ids(vds) in this problematic region. It is shown that this one-sided Taylor series extraction is insufficient for most applications of the FET in its triode zone, and thus an alternative method is proposed.
Lift Evaluation of a 2D Flapping Flat Plate
Creators: name: Xia, Xi
name: Mohseni, Kamran
Publisher: name: arXiv
Year: 2012
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Several previous experimental and theoretical studies have shown that a leading edge vortex (LEV) on an airfoil or wing can provide lift enhancement. In this paper, unsteady 2D potential flow theory is employed to model the flow field of a flapping flat plate wing. A multi-vortices model is developed to model both the leading edge and trailing edge vortices (TEVs), which offers improved accuracy compared with using only single vortex at each separation location. The lift is obtained by integrating the unsteady Blasius equation. It is found that the motion of vortices contributes significantly to the overall aerodynamic force on the flat plate. The shedding of TEVs and the stabilization of LEVs explicitly contributes to lift enhancement. A Kutta-like condition is used to determine the vortex intensity and location at the leading edge for large angle of attack cases; however, it is proposed to relax this condition for small angle of attack cases and apply a 2D shear layer model to calculate the circulation of the new added vortex. The results of the simulation are then compared with classical numerical, modeled and experimental data for canonical unsteady flat plat problems. Good agreement with these data is observed. Moreover, these results suggested that the leading edge vortex shedding for small angles of attack should be modeled differently than that for large angles of attack. Finally, the results of vortex motion vs. lift indicate that both a motion against the streamwise direction of the LEV and a streamwise motion of the TEV contributes positive lift. This also provides the insights for future active flow control of MAVs that the formation and shedding process of LEVs and TEVs can be manipulated to provide lift enhancement.
Macroeconomic effects of reallocation shocks: a generalised impulse response function analysis for three european countries.
Creators: name: Panagiotidisa, Theodore
name: Pellonib, Gianluigi
name: Polasekc, Wolfgang
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: SECS-P/06 Economia applicata

description: We develop a generalised impulse response function (GIRF) approach to explore the
different impacts of aggregate and sectoral shocks within a VAR-GARCH-M model.
Using the output of our GIRF analysis, we explore the behaviour of three European
countries (Germany, Spain and the UK). We analyse the aggregate and sectoral responses
to discriminate among three different hypotheses of business cycle fluctuations. Links are
established and explanations are provided within the still experimental character of our
exercise.
Non-linearity in the canadian and us labour markets: univariate and multivariate evidence from a battery of tests
Creators: name: Panagiotidis, Theodore
name: Pelloni, Gianluigi
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: SECS-P/05 Econometria

description: The assumption of linearity is tested using five statistical tests for the US and the
Canadian unemployment rates and the employment sectoral shares growth rates;
construction, finance, manufacturing and trade. An AR(p) model was used to remove any
linear structure from the series. Evidence of non-linearity is found for the sectoral shares
with all five statistical tests in the US case but not in the aggregate level. The results for
Canada are not so clear-cut. Evidence of unspecified non-linearity is found in the
unemployment rate and in the sectoral shares. Overall important asymmetries are found
in disaggregated labour market variables in the univariate setting. The linearity
hypothesis was also examined in a multivariate framework. Evidence is provided that
important asymmetries exist and a linear VAR cannot capture the dynamics of
employment reallocation.
Consumers' wine selection and the influence of Confucianism
Creators: name: Yao, Wei
Publisher: name: Macquarie University
Year: 2022
Subjects: classificationCode: 399999
subject: Other education not elsewhere classified

description: As the cornerstone of the Australian wine industry, the domestic wine market has developed steadily over the past two decades. Immigrants to Australia are an important demographic group who embed gradually into Australian society and are increasingly targeted as consumers by the Australian wine industry. But the domestic market is not homogenous as intra-national diversity (Tung and Baumann, 2009) creates a complex market place in Australia. The number of immigrants from East Asia has increased considerably over the last 10 years. This group typically has strong purchasing power and they are generally open to drinking alcoholic beverages. Research shows that culture influences consumers' attitudes and behavior (Luna and Gupta, 2001), and for East Asians, the Chinese and South Koreans are largely driven by Confucianism. In this study, wine category choice for Chinese and South Korean consumers was probed to establish the impact of their traditional Confucian values on consumer behaviour and then contrasted with Caucasian consumer behaviour. Three purchase motivation scenarios were presented to 511 consumers through a shopping mall intercept involving a questionnaire. The questionnaire was designed to examine and analyse wine category choice for self/household-consumption, social entertainment-use and gift giving. Separate models were developed to distinguish a preference for Australian and French wine. Backward deletion regression analysis was used to arrive at the most parsimonious models and the use of ANOVA with post-hoc analyses established significant differences in Confucianism among the three ethnic groups. This study is unique in establishing the impact of Confucianism on consumers' wine category choice. It also offers a new contribution in creating a concept to measure Confucian values in relation to consumer behaviour, the Confucian Consumer Behaviour Components (CCBC). A comparison of the three research models used in this study, namely the marketing model, the CCBC model and the hybrid model (which combined the marketing model and the CCBC model) finds that the hybrid model has the highest explanatory power for consumers' wine category choice. Implications for academic theory and practice are discussed.
Braidings on the category of bimodules, Azumaya algebras and epimorphisms of rings
Creators: name: Agore, A. L.
name: Caenepeel, S.
name: Militaru, G.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Algebra (math.QA)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 16T10, 16T05, 16S40

description: Let $A$ be an algebra over a commutative ring $k$. We prove that braidings on the category of $A$-bimodules are in bijective correspondence to canonical R-matrices, these are elements in $A\ot A\ot A$ satisfying certain axioms. We show that all braidings are symmetries. If $A$ is commutative, then there exists a braiding on ${}_A\Mm_A$ if and only if $k\to A$ is an epimorphism in the category of rings, and then the corresponding $R$-matrix is trivial. If the invariants functor $G = (-)^A:\{}_A\Mm_A\to \Mm_k$ is separable, then $A$ admits a canonical R-matrix; in particular, any Azumaya algebra admits a canonical R-matrix. Working over a field, we find a remarkable new characterization of central simple algebras: these are precisely the finite dimensional algebras that admit a canonical R-matrix. Canonical R-matrices give rise to a new class of examples of simultaneous solutions for the quantum Yang-Baxter equation and the braid equation.
description: 12 pages; final version, to appear in Appl. Cat. Structures
Mathematics worksheets as a pedagogical genre in secondary school classrooms
Creators: name: Deniz, Ozlem
Publisher: name: University of British Columbia
Year: 2013

description: From kindergarten to the end of secondary school, worksheets are common and dominant curriculum materials in mathematics education with profound effects on pedagogy. While worksheets play an important role in mathematics classrooms, there have been few attempts to describe and understand this pedagogical genre and its effects on the sociology of the classroom. This study examines what worksheets are and how they are used and perceived by teachers in mathematics education through the perspective of genre theory. It provides insights into how worksheets may impact the sociology of the classroom in terms of power and classroom dynamics and offers suggestions for implications through text analysis, focus groups and interviews. Given the important role worksheets play in mathematics education, the findings of this study may shed light into our understanding of the textual and contextual features of worksheets. This may, in turn, raise awareness among educators to revise their practice creating and using worksheets, and ultimately, improve mathematics education.
Process R&D in monopoly under demand uncertainty
Creators: name: Lambertini, Luca
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2004
Subjects: SECS-P/08 Economia e gestione delle imprese

description: I investigate R&D efforts for process innovation in a monopoly with uncertain
demand. Two different models are proposed, where either (i) the reservation
price is affected by an additive shock and the marginal production cost is
increasing, or (ii) a multiplicative shock on the slope of demand combines
with a flat marginal production cost. In either case, price-setting behaviour
generates a larger R&D investment than quantity-setting behaviour. An
Arrowian interpretation of the first result and a Schumpeterian interpretation
of the second are proposed.
The Initial Conditions of the Universe from Constrained Simulations
Creators: name: Kitaura, Francisco-Shu
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: I present a new approach to recover the primordial density fluctuations and the cosmic web structure underlying a galaxy distribution. The method is based on sampling Gaussian fields which are compatible with a galaxy distribution and a structure formation model. This is achieved by splitting the inversion problem into two Gibbs-sampling steps: the first being a Gaussianisation step transforming a distribution of point sources at Lagrangian positions -which are not a priori given- into a linear alias-free Gaussian field. This step is based on Hamiltonian sampling with a Gaussian-Poisson model. The second step consists on a likelihood comparison in which the set of matter tracers at the initial conditions is constrained on the galaxy distribution and the assumed structure formation model. For computational reasons second order Lagrangian Perturbation Theory is used. However, the presented approach is flexible to adopt any structure formation model. A semi-analytic halo-model based galaxy mock catalog is taken to demonstrate that the recovered initial conditions are closely unbiased with respect to the actual ones from the corresponding N-body simulation down to scales of a ~ 5 Mpc/h. The cross-correlation between them shows a substantial gain of information, being at k ~ 0.3 h/Mpc more than doubled. In addition the initial conditions are extremely well Gaussian distributed and the power-spectra follow the shape of the linear power-spectrum being very close to the actual one from the simulation down to scales of k ~ 1 h/Mpc.
description: 6 pages, 4 figures; accepted at MNRAS after minor corrections
The gains from cooperative R&D with a concave technology and spillovers
Creators: name: Lambertini, Luca
name: Rossini, Gianpaolo
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2004
Subjects: SECS-P/08 Economia e gestione delle imprese

description: We reassess the respective gains from R&D cooperation and competition in
a Cournot Duopoly with homogeneous goods, where firms adopt a concave
cost-reducing R&D technology. Contrary to the previous literature on the
same topic, our main results are that (i) no corner solutions emerge and (ii)
cooperation, in the form of either a cartel or a joint venture, is always profitable
for firms and (iii) socially superior to independent ventures, provided
that spillovers are sufficiently high.