cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
3D active modules for high integration active antennas
Creators: name: Ulian, Patrice
name: Monfraix, Philippe
name: George, Sebastien
name: Tronche, Christian
name: Drevon, C.
name: Cazaux, Jean-Louis
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1998
Subjects: ING-INF/01 Elettronica

description: This paper describes the different parts of active antenna sub-systems currently developed in Alcatel Espace. These modules are realized according to some new 3D RF packaging technologies, mainly based on moulding assembly.
Precompact groups and property (T)
Creators: name: Ferrer, M.
name: Hernández, S.
name: Uspenskij, V.
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Topology (math.GN)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 43A40 (Primary) 22A25, 22C05, 22D35, 43A35, 43A65, 54H11 (Secondary)

description: For any topological group $G$ the dual object $\hat G$ is defined as the set of equivalence classes of irreducible unitary representations of $G$ equipped with the Fell topology. If $G$ is compact, $\hat G$ is discrete, and we investigate to what extent this remains true for precompact groups, i.e. for dense subgroups of compact groups. We find that: (a) if $G$ is a metrizable precompact group, then $\hat G$ is discrete; (b) if $G$ is a countable non-metrizable precompact group, then $\hat G$ is not discrete; (c) every non-metrizable compact group contains a dense subgroup $G$ for which $\hat G$ is not discrete. This generalizes to the non-Abelian case what was known for Abelian groups. Kazhdan's property (T) can be defined in similar terms, but we must consider representations without non-zero invariant vectors rather than irreducible representations. If $G$ is any countable Abelian precompact group, then $G$ does not have property (T), although $\hat G$ is discrete if $G$ is metrizable.
description: 19 pages
Flip chip and tab interconnects for millimeter wave MMICs -  A comprehensive study
Creators: name: Dravet, Alain
name: Desplan, Didier
name: Haese, Nathalie
name: Rolland, Pierre Alain
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1998
Subjects: ING-INF/01 Elettronica

description: This paper presents simulation results performed with a 3D FEM Software on flip chip and tape automated bonding interconnect of MMICs at millimeter wave frequencies (40 - 60 Ghz). Parasitic propagation modes for CPW flip chip mounted MMICs are pointed out with proposed solution. Measurement results obtained with LNA 38 and 55 GHz microstrip MMICs connected to alumina substrates with a 50 Ohm coplanar tape are presented and show goodagreement compared to bare MMICs and to simulations.
On the feasibility of a nuclear exciton laser
Creators: name: Brinke, Nicolai ten
name: Schützhold, Ralf
name: Habs, Dietrich
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Nuclear excitons known from Mössbauer spectroscopy describe coherent excitations of a large number of nuclei -- analogous to Dicke states (or Dicke super-radiance) in quantum optics. In this paper, we study the possibility of constructing a laser based on these coherent excitations. In contrast to the free electron laser (in its usual design), such a device would be based on stimulated emission and thus might offer certain advantages, e.g., regarding energy-momentum accuracy. Unfortunately, inserting realistic parameters, the window of operability is probably not open (yet) to present-day technology -- but our design should be feasible in the UV regime, for example.
description: 7 pages RevTeX, 4 figures
Equilibrium Locations in a Spatial Model with Sequential Entry in Real Time
Creators: name: Lambertini, Luca
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1998
Subjects: SECS-P/01 Economia politica

description: I describe the entry process in a spatial market over an infinite time horizon. I show that, as long as the strategy space at the location stage is unbounded, the results derived from the single-period Stackelberg model of entry coincide with those obtained in the infinite horizon model. On the contrary, if the strategy space is bounded, then the later the follower enters, the closer to the center of the market the leader locates at the initial date.
Lepischiza Moser 1914
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Lepischiza

description: Lepischiza Moser, 1914b
[1 species].
Type species Lepischiza vestita Moser, 1914, by subsequent designation in this paper.
Leucophorus: Brenske 1892a.
Unavailable name.
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 133, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
Asymptotically Lifshitz Brane-World Black Holes
Creators: name: Ranjbar, Arash
name: Sepangi, Hamid Reza
name: Shahidi, Shahab
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the gravity dual of a Lifshitz field theory in the context of a RSII brane-world scenario, taking into account the effects of the extra dimension through the contribution of the electric part of the Weyl tensor. We study the thermodynamical behavior of such asymptotically Lifshitz black holes. It is shown that the entropy imposes the critical exponent $z$ to be bounded from above. This maximum value of $z$ corresponds to a positive infinite entropy as long as the temperature is kept positive. The stability and phase transition for different spatial topologies are also discussed.
description: 14 pages, 4 figures, to appear in Annals of Physics
A simulation of the Neolithic transition in the Indus valley
Creators: name: Lemmen, Carsten
name: Khan, Aurangzeb
Publisher: name: arXiv
Year: 2011
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Multiagent Systems (cs.MA)
subject: FOS: Biological sciences
subject: FOS: Computer and information sciences

description: The Indus Valley Civilization (IVC) was one of the first great civilizations in prehistory. This bronze age civilization flourished from the end of the fourth millennium BC. It disintegrated during the second millennium BC; despite much research effort, this decline is not well understood. Less research has been devoted to the emergence of the IVC, which shows continuous cultural precursors since at least the seventh millennium BC. To understand the decline, we believe it is necessary to investigate the rise of the IVC, i.e., the establishment of agriculture and livestock, dense populations and technological developments 7000--3000 BC. Although much archaeological information is available, our capability to investigate the system is hindered by poorly resolved chronology, and by a lack of field work in the intermediate areas between the Indus valley and Mesopotamia. We thus employ a complementary numerical simulation to develop a consistent picture of technology, agropastoralism and population developments in the IVC domain. Results from this Global Land Use and technological Evolution Simulator show that there is (1) fair agreement between the simulated timing of the agricultural transition and radiocarbon dates from early agricultural sites, but the transition is simulated first in India then Pakistan; (2) an independent agropastoralism developing on the Indian subcontinent; and (3) a positive relationship between archeological artifact richness and simulated population density which remains to be quantified.
description: Chapter manuscript revision submitted to AGU monograph "Climates, landscapes and civilizations", 6 pages, 2 figures
Testing for structural change in cointegrated relationships Analysis of price-wages models for Poland and Hungary
Creators: name: Golinelli, Roberto
name: Orsi, Renzo
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1998
Subjects: SECS-P/05 Econometria

description: In previous studies concerning short and long run relationships for price-wage models, the cointegration analysis has been developed assuming the existence of a unique cointegration parametrisation. These empirical results reveal the presence of significant relationships, both in the short and in the long run, among prices, wages, labour productivity and exchange rate. In this paper we intend to develop the possibility of a more general type of cointegration, allowing for a change at an unknown time period in the sample. At this end we will consider mainly the long run relationship among these variables using the testing procedure suggested by Gregory and Hansen (1996a, 1996b). This permits us to consider a multivariate extension of the endogenous break univariate approach and in the meanwhile this enables to test for cointegration in the presence of possible structural breaking cointegrated relationships under the alternative. The empirical analysis of a multivariate model for price-wage relationship both for Poland and Hungary, over the period 1970-1996, is presented and discussed.
Einfluss von lokal applizierten Knochenmarkzellen und CD-117+-hämatopoetischen Stammzellen auf den zeitlichen Verlauf der kornealen Wundheilung
Creators: name: Schilling, Ulf Martin
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2007
Subjects: subject: Elektronische Publikation
subject: Hochschulschrift
subject: Online-Publikation
subject: Zsfassung in engl. Sprache
subject: 617.7

description: In dieser Arbeit wurden die Therapieansätze einer Lokaltherapie mit Knochenmarkzellen (KMZ) und CD117+-hämatopoetischen Stammzellen (CD117+-HSC) an einem in vivo/in vitro-Alkali-Defekt-Modell der Mauskornea miteinander verglichen. Als Kontrolle diente Stammzellmedium. Die Versuche erfolgten an 48 syngenen Balb/C Mäusen über einen Zeitraum von 85 h. Die Größe der Defekte wurde an 10 Zeitpunkten gemessen. Heilungsrate, Heilungszeit und Heilungsgeschwindigkeit der Hornhäute wurden analysiert. Eine mögliche Integration der applizierten Zellen wurde mit dem Zelltracer Vybrant™-CFDA SE sowie der Färbung nach CD 117 und Cytokeratin 3/12 überprüft. Die Applikation von lokal applizierten KMZ und CD117+-HSC erhöht die Heilungsrate und Heilungsgeschwindigkeit kornealer Alkaliverätzungen signifikant. Eine Integration der applizierten Zellen in das korneale Epithel konnte nicht nachgewiesen werden. Die Ergebnisse könnten neue stammzellbasierte Therapieverfahren zur Behandlung schwerer kornealer Verletzungen eröffnen.
description: In this study the therapeutic approaches of a topical therapy with bone-marrow-cells (BMC) and CD117+-hematopoietic stem cells (CD117+-HSC) were compared in an in vivo/invitro-alkali-burn-modell of the murine cornea. Stemcellmedium was used as control. The experiments were conducted on 48 Balb/C-mice during a period of 85 h. The size of the ulcers was measured at 10 timepoints. Healing rate, healing time and -velocity of the corneae was analyzed. A possible integration of the applied cells was controlled by using the cell-tracer Vybrant™-CFDA SE and immunostaining for CD 117 and cytokeratine 3/12. The topical application of BMC and CD117+-HSC significantly enhances the healing rate and -velocity of corneal alkali burns. An integration of the applied cells into the corneal epithelia could not be detected. These results could allow new therapeutic approaches in the treatment of corneal injury.
R&d, embodied technological change, producers-users interaction, and productivity at the firm level: a Germany-Italy comparison
Creators: name: Lotti, Francesca
name: Santarelli, Enrico
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1998
Subjects: SECS-P/02 Politica economica

description: This paper follows a knowledge production function approach to assess the contribution of R&D spending, the purchase of new machinery, and producersusers interaction to the productivity performance of German and Italian firms in manufacturing. For this purpose it employs microaggregated data from the First Community Innovation Survey. The regression analysis confirms the results of previous studies that technological change embodied in new machinery and capital equipment is a major factor affecting the productivity level of manufacturing firms in most industries (in particular in Italy), although the role of R&D activities is crucial for most firms in both countries, and that this is also the case in traditional consumer goods industries such as textiles, clothing, and leather & leather products. Conversely, only for Germany does producersusers interaction prove significantly to influence the productivity level of firms in certain industries.
The energy graph of the non linear Schrödinger equation
Creators: name: Procesi, Michela
name: Procesi, Claudio
name: Van, Nguyen Bich
Publisher: name: arXiv
Year: 2012
Subjects: subject: Analysis of PDEs (math.AP)
subject: Algebraic Geometry (math.AG)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: We discuss the stability of a class of normal forms of the completely resonant non--linear Schrödinger equation on a torus described in a previous paper. The discussion is essentially combinatorial and algebraic in nature. Thus this paper contains the proof of two Theorems of algebraic, combinatorial and geometric nature, which we need in order to prove stability of certain solutions of the non--linear Schrödinger (NLS) equation on a torus.
Oreotrogus Kolbe 1897
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Oreotrogus

description: Oreotrogus Kolbe, 1897
[2 species].
Type species Oreotrogus volkensi Kolbe, 1897, 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 133, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
Charakterisierung von AtFKBP42 und weiteren Peptidyl-Prolyl-cis/trans-Isomerasen aus Arabidopsis thaliana
Creators: name: Kamphausen, Thilo
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2002
Subjects: Elektronische Publikation
Hochschulschrift
Zsfassung in engl. Sprache

description: Der Phänotyp der Arabidopsis thaliana Mutantenlinie 'Twisted dwarf' ist auf den Funktionsverlust eines Gens zurückzuführen, das ein FKBP mit einer molekularen Masse von 42 kDa codiert. Der Phänotyp der 'Twisted dwarf'-Pflanzen zeichnet sich durch verringertes, desorientiertes Wachstum und eine Unempfindlichkeit gegenüber dem Pflanzensteroidhormon Brassinolid aus. Das Protein AtFKBP42 wurde biochemisch eingehend charakterisiert und die subzelluläre Lokalisation durch Elektronenmikroskopie analysiert. Für die Charakterisierung wurden unterschiedliche Abschnitte der cDNA in Expressionsvektoren kloniert und die entsprechenden Proteine gereinigt. Sekundärstrukturelemente der gereinigten Proteine wurden mittels CD-Spektroskopie untersucht. Obwohl eine Sequenzhomologie zu der Enzymklasse der FKBP besteht, konnte für AtFKBP42 nachgewiesen werden, das von der FKBP-Domäne keine, mit den etablierten Tests nachweisbare, katalytische Aktivität ausgeht. AtFKBP42 bindet über den C-terminalen Bereich AtHsp90 und Calmodulin. Um AtFKBP42 in einen Gesamtzusammenhang der PPIasen in Arabidopsis thaliana einordnen zu können, wurde das Arabidopsis-Genom nach weiteren PPIase-Genen untersucht und die identifizierten Gene analysiert. Ergänzend wurden drei neue T-DNA Insertionslinien (für zwei FKBP- und ein Hsp90-Gen) identifiziert sowie die Aktivität weiterer PPIasen charakterisiert.
description: The 'twisted dwarf' phenotype of an Arabidopsis thaliana mutant line can be correlated with a loss of function mutation of a 42 kDa FKBP encoding gene. The 'twisted dwarf' phenotype is characterised by a reduced and disorientated growth and the insensitivity towards the plant steroid hormone brassinolide. The AtFKBP42 protein was characterised extensively by biochemical methods. Subcellular localisation was analysed by means of electron microscopy. Several parts of the AtFKBP42 cDNA were cloned into expression vectors for characterisation and the corresponding proteins were purified. Although the protein shows homology to FKBP, it could be shown that the FKBP domain exhibits no PPIase activity, detectable by the established assays. With its c-terminal region AtFKBP42 binds AtHsp90 and Calmodulin. To get more information about the global situation of PPIases of Arabidopsis the genome was examined for further PPIase genes. Those genes were analysed in detail. Additionally three T-DNA insertion lines (of two FKPB and one Hsp90 gene) were identified and the activity of further PPIases was characterised.
Secondary authorship : aesthetics and the idea of mass culture in the United States, 1835-1866
Creators: name: McAlister, Sean
Publisher: name: University of British Columbia
Year: 2013

description: My dissertation examines popular authorship in the antebellum United States. Following the print explosion of the 1830s, American authors found themselves participating in a slowly emerging mass print culture. While most scholars agree that massification proper did not characterize the production, circulation, and consumption of popular literature until after the Civil War, I argue that the idea of mass culture emerged in the antebellum decades. The idea that reading could be a mass-scale phenomenon provoked many antebellum authors to attend to the material effects of reading, while their relative freedom from institutional constraints enabled these same authors a degree of pre-culture industrial experimentation that was unique to the antebellum period. The title of my dissertation, “Secondary Authorship,” refers to a loss of confidence in the idea of authorship as origination; authorship in antebellum America, I argue, was a circular game of observing the effects of writing and experimenting in their causes. My first chapter analyzes Edgar Allan Poe’s recasting of Kantian disinterest in terms of mass interest in his short tale “Berenice.” In my second chapter, I extend Poe’s theory of interest to a consideration of antebellum city mysteries fiction, and, in particular, to the reformist poetics of George Lippard’s The Quaker City. My third chapter reads Herman Melville’s Pierre; or, the Ambiguities as ambivalent about its participation in mass reading. Finally, my fourth chapter examines the “minor” relation to Emersonian Transcendentalism that Louisa May Alcott constructs in her novel Moods. In the course of my analyses of antebellum fiction, I make literary critical use of systems theory, Immanuel Kant’s aesthetic theory, American Pragmatist philosophy, and the affect theories of Silvan Tomkins.
Endogenous Choice of Capacity and Product Innovation in a Differentiated Duopoly
Creators: name: Lambertini, Luca
name: Rossini, Gianpaolo
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1998
Subjects: SECS-P/01 Economia politica

description: We model a symmetric duopoly where firms choose whether to be quantity setters or price setters by deciding the optimal capacity; undertake R&D activity to determine the degree of differentiation; and finally compete in the market. Two games are proposed, where investment decisions follow different sequences. We assess price and quantity decisions, finding a set of equilibria where the choice of the market variable is affected by both technological commitments. As a result, the acquired wisdom that quantity setting is a dominant strategy for firms, while price setting is a dominant strategy from a social standpoint, may not be confirmed.
The conformal transformation's controversy: what are we missing?
Creators: name: Quiros, Israel
name: Garcia-Salcedo, Ricardo
name: Aguilar, Jose Edgar Madriz
name: Matos, Tonatiuh
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: An alternative interpretation of the conformal transformations of the metric is discussed according to which the latter can be viewed as a mapping among Riemannian and Weyl-integrable spaces. A novel aspect of the conformal transformation's issue is then revealed: these transformations relate complementary geometrical pictures of a same physical reality, so that, the question about which is the physical conformal frame, does not arise. In addition, arguments are given which point out that, unless a clear statement of what is understood by "equivalence of frames" is made, the issue is a semantic one. For definiteness, an intuitively "natural" statement of conformal equivalence is given, which is associated with conformal invariance of the field equations. Under this particular reading, equivalence can take place only if the metric is defined up to a conformal equivalence class. A concrete example of a conformal-invariant theory of gravity is then explored. Since Brans-Dicke theory is not conformally invariant, then the Jordan's and Einstein's frames of the theory are not equivalent. Otherwise, in view of the alternative approach proposed here, these frames represent complementary geometrical descriptions of a same phenomenon. The different points of view existing in the literature are critically scrutinized on the light of the new arguments.
description: 17 pages, no figures. version accepted by General Relativity and Gravitation journal
Efficienza tecnica e produzione ospedaliera: una valutazione con Data Envelopment Analysis delle prestazioni ospedaliere nel periodo della riforma
Creators: name: Fabbri, Daniele
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1998
Subjects: SECS-P/02 Politica economica

description: In questi ultimi anni il Sistema Sanitario Nazionale è stato sottoposto ad un sostanziale processo di trasformazione e di riforma. Uno fra gli ambiti più investiti dalle trasformazioni in atto è certamente quello della produzione di servizi ospedalieri. Nel quadro istituzionale che si va delineando i produttori vengono sempre più responsabilizzati a perseguire strategie di razionalizzazione nell’uso delle risorse e di razionamento della domanda. E’ in questo contesto che il miglioramento dell’efficienza produttiva assume il valore di obiettivo prioritario. In questo studio ci concentriamo sulla componente tecnica dell’efficienza nella produzione ospedaliera al fine di valutare se e in quale misura le recenti riforme abbiano contribuito ad accrescerla. L’analisi viene condotta, impiegando la tecnica di Data Envelopment Analysis (DEA), sugli ospedali pubblici della regione Emilia-Romagna, i cui dati d’attività sono stati rilevati per il periodo fra il 1994 e il 1995. I risultati confermano la presenza di un significativo miglioramento delle prestazioni in termini di efficienza tecnica che si realizza in assenza di progresso tecnologico. Il miglioramento è pronunciato e statisticamente significativo nell’ambito della produzione di "ricoveri", mentre risulta statisticamente non significativo nella produzione di "giornate di degenza". L’inefficienza si concentra nell’utilizzo del personale amministrativo e di quello infermieristico. L’utilizzo dei letti e del personale medico risulta pressoché pienamente efficiente. Sul versante degli output si riscontra il permanere di una rilevante capacità inutilizzata nella produzione di ricoveri di elevata complessità. Questo porta a concludere che nel periodo esaminato gli incentivi introdotti dalla riforma hanno raggiunto l’obiettivo di migliorare l’efficienza nell’uso delle risorse tuttavia sono stati insufficienti rispetto al contenimento della produzione sanitaria e al razionamento della domanda.
Does Monopoly Undersupply Product Quality?
Creators: name: Lambertini, Luca
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1998
Subjects: SECS-P/01 Economia politica

description: I investigate the behaviour of a multiproduct monopolist supplying vertically differentiated varieties of the same good. The discrete model adopted here allows to obtain a continuous model when, in the limit, the number of varieties becomes infinitely large. The main finding establishes that the tendency on the part of the monopolist to undersupply all qualities but the top one can take two alternative forms, i.e., either qualities correspond to the socially optimal ones but the allocation of consumers across qualities is distorted by the price schedule, or qualities are indeed lower than those supplied under social planning. The first case arises when the monopolist finds it profitable to restrict output, while the second obtains when the market is rich enough to induce the monopolist to supply the same quantity a social planner would produce. Policy implications are discussed.
Esternalità e sviluppo industriale di lungo periodo in
Italia. Una analisi a livello provinciale
Creators: name: Cainelli, Giulio
name: Leoncini, Riccardo
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1998
Subjects: SECS-P/01 Economia politica

description: The aim of this paper is to provide, following an approach recently developed by Glaeser et al. (1992), an empirical investigation on the role of dynamic externalities in industrial agglomeration and longrun industrial development. By means of a very large dataset containing information at provincia level for 16 sectors of Italian manufacturing industry covering a thirty year period (1961-1991), geographical specialisation and variety of the local production are investigated, for both Italy and four geographical areas (North-West, North-East, South-East and South-West). It is argued that history matters, that is, initial conditions explain a very large share of industrial agglomeration, but within the geographical areas very different patterns of externalities emerge, as well as different local labour markets for the North and South of Italy.
Dark Higgs Models at the 7 TeV LHC
Creators: name: Weihs, Erich
name: Zurita, Jose
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study how collider data and electroweak precision observables affect the parameter space of models including a new dark force mediated by a massive U(1) gauge boson. It acquires mass via a Higgs mechanism in the dark sector which is connected to the Standard Model through kinetic mixing of the two U(1) gauge bosons and the Higgs potential. We assess the impact of the 7 TeV LHC and show that most of the parameter space of the model can be probed with an integrated luminosity of 15 fb^-1.
description: 20 pages, 8 figures; references, clarification and note added; conclusions unaltered; version accepted for publication in JHEP; v3: added references
Packaging solutions in space MCM's and MHIC's
Creators: name: Cirone, R.
name: Di Mattia, A.
name: Tursini, M.
name: Suriani, A.
name: Comparini, M.C.
name: Arpesi, P.G.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1998
Subjects: ING-INF/01 Elettronica

description: Since 90's MCM. MIC's, and MHIC's have been developed by several technological approaches for space application. Alternatives in the packaging solutions through thick film hybrids and thin film MIC have been found to increase integration level and reliability of space components. For analog and digital hybrids thick film MCM technology evolution was driven by high resolution printing and fine line etching of top layers. Thin film multilayer technologies employing photosensitive polyimide and sputtered SiO2 as dielectric have been evaluated to achieve line/gap structures of 25 um as well embedded NiCr resistors, LTCC MCM's using etched thin film fine lines have been evaluated. GaAs discrete and MMIC dices take relevant role in hermetic cavities development for MHIC's in C-X-Ku- Ka bands. Last prototyping and space qualification work is going to develop high-tech mixed solutions hybrids based on LTCC with thin film metallizations for MW applications, and HTCC with fine lines for MCM's.
Phiara Brenske 1897
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Phiara

description: Phiara Brenske, 1897
[2 species].
Type species Phiara flava Brenske, 1897, 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 133, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
Immunhistochemische Untersuchungen der Leukozytenantigene CD3, CD4 und CD8 bei der Leukoenzephalitis der Lewis-Ratte nach intrazerebraler Injektion des Superantigens Staphylokokken Enterotoxin A
Creators: name: Gerlach, Kristina
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2011
Subjects: subject: Online-Publikation
subject: Hochschulschrift
subject: 611

description: Superantigene sind polyklonale T-Zell-Aktivatoren, die von Bakterien und Viren produziert werden. Eine bedeutende Rolle von Superantigenen wird bei der Entstehung verschiedener autoimmunologischer Erkrankungen einschließlich der Multiplen Sklerose diskutiert. 18 Lewis-Ratten wurden an den Tagen 3½, 6 und 8 nach intrazerebraler Injektion des Superantigens Staphylokokken Enterotoxin A (SEA) geopfert. Die T-Zell-Marker CD3, CD4 und CD8 wurden an zerebralen Gefrierschnitten immunhistochemisch untersucht. Es trat eine vorwiegend perivaskuläre Entzündungsreaktion auf (Superantigen-Enzephalitis). Diese war auf der Injektionsseite (rechts) signifikant stärker ausgeprägt als auf der Gegenseite, mit einem Maximum 12 h nach i.v. Injektion aktivierter Milzzellen. Das entzündliche Infiltrat wurde von zytotoxischen CD8+ T-Zellen dominiert. Die Beobachtungen weisen eine Reihe von Übereinstimmungen zum Entzündungsbild bei Multipler Sklerose oder der experimentellen autoimmunen Enzephalomyelitis (EAE) auf.
Averaging Fluctuations in Resolvents of Random Band Matrices
Creators: name: Erdos, Laszlo
name: Knowles, Antti
name: Yau, Horng-Tzer
Publisher: name: arXiv
Year: 2012
Subjects: subject: Probability (math.PR)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 15B52, 82B44, 82C44

description: We consider a general class of random matrices whose entries are centred random variables, independent up to a symmetry constraint. We establish precise high-probability bounds on the averages of arbitrary monomials in the resolvent matrix entries. Our results generalize the previous results of [5,16,17] which constituted a key step in the proof of the local semicircle law with optimal error bound in mean-field random matrix models. Our bounds apply to random band matrices, and improve previous estimates from order 2 to order 4 in the cases relevant for applications. In particular, they lead to a proof of the diffusion approximation for the magnitude of the resolvent of random band matrices. This, in turn, implies new delocalization bounds on the eigenvectors. The applications are presented in a separate paper [3].
Proteroschiza Brenske 1896
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Proteroschiza

description: Proteroschiza Brenske, 1896d
[1 species].
Type species Proteroschiza wituensis Brenske, 1896, 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 133, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
Bifurcation analysis of synchronized microwave circuits using commercial software
Creators: name: Palazuelos, Enrique
name: Barahona, Fco. Javier
name: Suarez, Almudena
name: Portilla, Joaquin
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1998
Subjects: ING-INF/01 Elettronica

description: In this paper a new method is proposed for obtaining the complete synchronization curves of injected oscillators or analog frequency dividers, using harmonic balance (HB) commercial simulators. The bifurcation loci on the input power-input frequency plane, globally providing the circuit operating bands can also be obtained. The new method offers an invaluable aid to microwave designers, avoiding the need for specific in-house simulation tools and taking advantage of the flexibility and friendliness of standard commercial software. The method is illustrated by means of its application to the design of a frequency divider by two, obtaining for the first time, to our knowledge, complete synchronization curves and bifurcation loci from a commercial simulator. Under some modifications, the method is applicable to tuned circuits. Simulation and measurements of a MMIC VCO are shown for experimental validation.
Effects of self-heating on parameter extraction for GaInP/GaAs HBT nonlinear models
Creators: name: Norton, Mark E.
name: Brazil, Thomas J.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1998
Subjects: ING-INF/01 Elettronica

description: This paper addresses the issues involved in developing a large-signal heterojunction bipolar transistor (HBT) model with particular emphasis on the role self-heating plays in the parameter extraction process. Starting from a physical analysis of the device, a novel, equivalent-circuit DC model is proposed which models both base and collector currents separately. However self-heating will play a large role in any measurements used in any associated parameter extraction technique developed in conjunction with the model. Therefore a thermal sub-circuit representing the device is first created both from measurements and knowledge of the transistor's physical properties. All DC parameters are then extracted from forward and reverse Gummel plots taken at several ambient temperatures which have had the effects of self-heating removed using a novel "thermal de-embedding" technique. S-parameter measurements made from 45MHz to 20GHz allow for determination of the model's dynamic elements to complete the large signal model. Finally, for verification purposes. DC output characteristics and several single-tone power sweep measured results are given which show good agreement with simulated behaviour.
Lebensqualität von Dysgnathiepatienten
Creators: name: Odemar, Franziska
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2010
Subjects: subject: Online-Publikation
subject: Hochschulschrift
subject: 613

description: Fragestellung: Der Einfluss einer ausgeprägten skelettalen Anomalie im Kiefer-Gesichtsbereich auf die Lebensqualität wurde nur äußerst unzureichend erfasst. Zielsetzung: Das Ziel der Untersuchung war die Einführung eines validierten und international vergleichbaren Fragebogens zur Beurteilung der Lebensqualität sowie dessen Anwendung an einer konsekutiv ausgewählten Patientengruppe. Material und Methoden: Der international verwendete Fragebogen „Orthognathic Quality of life Questionnaire (OQLQ)“ wurde entsprechend den EU-Leitlinien ins Deutsche übertragen und adaptiert. Es wurden insgesamt 121 Patienten (w=77, m=44) in die Untersuchung einbezogen. Neben der Auswertung einzelner Fragen erfolgte die Zusammenfassung zu folgenden Kategorien: (1) Wahrnehmung der Anomalie, (2) Kaufunktion, (3) Ästhetik, (4) Soziale Aspekte. Die statistische Auswertung erfolgte mit SPSS® 13.0 ( Chi² –Test; p=0,05). Ergebnisse: Dysgnathiepatienten zeigten ein hohes Bewusstsein für den Grad der Anomalie. Die Antworten beinhalten häufig schwere bzw. sehr schwere kaufunktionelle Einschränkungen und/oder ästhetische Beeinträchtigungen. Die Befragten berichteten ebenso über negative Auswirkungen auf das soziale Verhalten. Schlussfolgerungen: Für den deutschsprachigen Raum konnte eine international vergleichbare Erhebung zur Lebensqualität bei Patienten mit einer ausgeprägten Kieferfehlstellung durchgeführt werden. Diese Pilotstudie zeigt, dass ihre Lebensqualität signifikant eingeschränkt ist.
Theory of frequency-filtered and time-resolved N-photon correlations
Creators: name: del Valle, Elena
name: Gonzalez-Tudela, Alejandro
name: Laussy, Fabrice P.
name: Tejedor, Carlos
name: Hartmann, Michael J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: A theory of correlations between N photons of given frequencies and detected at given time delays is presented. These correlation functions are usually too cumbersome to be computed explicitly. We show that they are obtained exactly through intensity correlations between two-level sensors in the limit of their vanishing coupling to the system. This allows the computation of correlation functions hitherto unreachable. The uncertainties in time and frequency of the detection, which are necessary variables to describe the system, are intrinsic to the theory. We illustrate the formalism with the Jaynes--Cummings model, showing how correlations of various peaks at zero or finite time delays bring new insights into the dynamics of open quantum systems.
description: 12 pages, 2 figures
The Dark Matter Inverse Problem: Extracting Particle Physics from Scattering Events
Creators: name: McDermott, Samuel D.
name: Yu, Hai-Bo
name: Zurek, Kathryn M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The primary observable in dark matter direct detection is the spectrum of scattering events. We simulate multiple positive direct detection signals (on germanium, xenon, and argon targets) to explore the extent to which the underlying particle physics, manifested in the momentum dependence of the operator mediating the scattering, can be extracted. Taking into account realization (Poisson) noise, a single target nucleus with 300 events has limited power to discriminate operators with momentum dependence differing by q^\pm2 for a wide range of dark matter masses from 10 GeV to 1 TeV. With the inclusion of multiple targets (or a factor of several more events on a single target), the discrimination of operators with different momentum dependence becomes very strong at the 95% C.L. for dark matter candidates of mass 50 GeV and above. On the other hand, operator discrimination remains poor for 10 GeV candidates until multiple experiments each collect 1000 or more events.
description: 32 pages, 14 figures; references updated; revised to match journal version
Comparison of For-Hire Motor Carriers Operating Under the Agricultural Exemption with Regulated Motor Carriers
Creators: name: Miklius, W.
name: Miklius, W.
Publisher: name: Unknown
Year: 1966
Subjects: subject: Agricultural and Food Policy
subject: Marketing
subject: FOS: Economics and business
subject: Research Methods/ Statistical Methods

description: Excerpts from the report: The motor-carrier industry is unique among the regulated industries, because the for-hire interstate transportation of unmanufactured agricultural commodities by truck is exempt from economic regulation by section 203(b), subsection 6 of the Motor Carrier Act of 1935, as amended. This section is known as the agricultural exemption, and carriers engaged exclusively in hauling exempt agricultural commodities are known as exempt carriers. This report analyzes the data supplied by special tabulation of the 1963 Census of Transportation. The purpose is finding answers to the following questions: (1) What are the operating characteristics of motor carriers engaged in hauling exempt agricultural commodities? (2) Do these characteristics differ from those of carriers subject to economic regulation? (3) How do the estimates based on smaller samples compare with those based on the Census data?
Multiuser pre-filtered ultra-wideband systems
Creators: name: Ahmadian, Zahra
Publisher: name: University of British Columbia
Year: 2013

description: Ultra-wideband (UWB) communication enables license-exempt transmission with very low power over large bandwidths. The technology can provide very high data rates over short transmission ranges to support applications such as real-time data streaming, interchip communication and wireless memory. The work in this thesis considers a particular type of high data-rate multiuser direct-sequence UWB (DS-UWB) with popular and commonly used binary UWB signalling. The system consists of multiple low-complexity DS-UWB transceivers (nodes) and a central unit that is more powerful in terms of signal processing capabilities. We mostly focus on the transmission from the central unit to the nodes. We address the following main questions: (1) What signal processing should be applied at the central unit to enable simple yet reliable detection at low-complexity nodes? (2) How can the system performance be optimized in the presence of imperfect channel estimation? (3) Is it possible to improve the system performance by incorporating the binary detector structure in the transmitter design? (4) How can the performance of a network of multiple UWB nodes communicating through a central relay be optimized? For question (1), we propose to shift the signal processing load from the nodes to the central unit via pre-filtering (the combination of pre-rake and pre-equalization) of the transmit signal at the central node, and we provide filter design strategies for the downlink communication. Questions (2) is addressed by studying the impact of errors in estimation of the channel impulse response at the central unit. Two mathematical models are proposed to represent the channel estimation error and robust strategies are formulated for the design of downlink pre-equalization filters (PEFs). For the popular binary UWB signalling, the real-part of the received signal contains sufficient statistics for signal detection. Hence the widely linear design of PEFs is proposed to answer question (3). As for question (4), we extend our design methods to multi-way internode communication via a central relay. Two relaying strategies namely, detect-and-forward relaying and filter-and-forward relaying with partial and full self-interference cancellation are devised.
A signal-theory based approach for the approximation of electron device characteristics
Creators: name: Filicori, F.
name: Vannini, G.
name: Santarelli, A.
name: Traverso, P.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1998
Subjects: ING-INF/01 Elettronica

description: A new approach to the approximation of nonlinear characteristics for look-up table based electron device models is proposed. It relys on the strong analogy between signal sampling and characteristic measurements over a discrete grid of bias points. On this basis, nonlinear function approximation can be carried out by using approaches similar to well-known techniques for reconstruction of continuous-time signals from a given sequence of samples. With respect to conventional interpolation techniques, the method proposed guarantees the accurate reproduction both of nonlinear characteristics and as­sociated derivatives without non physical slopes or oscillating behaviour. Preliminary simulated and experimental results confirming the effectiveness of this approach are presented.
Analysis of propagation on MODFET-type coplanar waveguide
Creators: name: Farina, M.
name: Rozzi, L.
name: De Leo, R.
name: Rozzi, T.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1998
Subjects: ING-INF/01 Elettronica

description: An analysis of propagation on Coplanar Waveguide loaded with extrinsic semiconductor material -in MODFET-like structure - is proposed. The model takes into account both semiconductor and conductor losses, as well as the finite conductor thickness.
Octahedral Symmetry with Geometrical Breaking: New Prediction for Neutrino Mixing Angle theta_{13} and CP Violation
Creators: name: He, Hong-Jian
name: Xu, Xun-Jie
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We propose octahedral group O_h as the family symmetry of neutrino-lepton sector. We find that O_h contains subgroups Z_2(mu-tau) x Z_2(solar) and Z_4^l for realizing the bimaximal (BM) mixings, theta_{23} = theta_{12} = 45^o and theta_{13}=0^o, where Z_2(mu-tau) x Z_2(solar) and Z_4^l serve as the residual symmetries of neutrinos and charged leptons, respectively. We present geometric interpretations of BM mixing in the octahedron, and construct natural geometrical breaking of Z_4^l, leading to nontrivial deviations from the BM mixings. Our theory makes truly simple predictions of a relatively large reactor angle, theta_{13} = 45^o - theta_{12} = 7.5^o - 13.7^o (3 sigma), the nearly maximal atmospheric angle and the approximate maximal Dirac CP violation. These agree well with the current neutrino data, and will be further probed by the on-going and upcoming oscillation experiments.
description: PRD Rapid Communication (in press). Added only minor clarifications and some references
Psilonychus Burmeister 1855
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Psilonychus

description: Psilonychus Burmeister, 1855
[8 species].
Type species Psilonychus ecklonii Burmeister, 1855, by subsequent designation of Bouchard et al. (2024).
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 134, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
An advanced GaAs/lnGaP HBT MMIC process
Creators: name: Peniket, N. A.
name: Davies, I.
name: Davies, R. A.
name: Marsh, S. P.
name: Wadsworth, S. D.
name: Wallis, R. H.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1998
Subjects: ING-INF/01 Elettronica

description: An advanced, general purpose GaAs/lnGaP HBT process has been developed at GEC Marconi Materials Technology Ltd. (GMMT). A range of digital and analogue circuit functions has been successfully implemented, demonstrating the capability of the process to provide high linearity and broadband circuits for communications applications. IP3-P1dB figures of up to 11.3dB have been measured and high density, high speed digital circuits have also been demonstrated with frequency divider toggle rates of over 16GHz. GMMT are also developing a variant of the process with improved breakdown voltage specifically for power applications. This paper gives an overview of the process technology and of demonstrated circuit performance. Results of accelerated lifetests are also presented.