cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Scalable distributed model for microwave and millimetre-wave monolithic FET - type devices
Creators: name: Castillo-Vázquez, B.
name: Martin-Guerrero, T. M.
name: Camacho-Peñalosa, C.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1997
Subjects: ING-INF/01 Elettronica

description: In this contribution, the authors report an approach for constructing a scalable small-signal distributed model. This model, whose elements are defined per unit gate width, has been used to simulate the small-signal behaviour of three monolithic MESFET devices which only differ in the gate width (25, 50 and 75 \im). S-parameters measured in the 1-40 GHz frequency range at a wide variety of bias conditions were used to perform the simulations. The difficulty to produce good scalable models is shown as well as the need to make use of measurements of identical devices with different gate widths, not only to develop a scalable model, but also to provide physical meaning to the equivalent circuit.
Small-signal and noise two-dimensional modeling of submicrometer high speed bipolar transistor
Creators: name: Rinaudo, S.
name: Privitera, G.
name: Ferla, G.
name: Galluzzo, A.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1997
Subjects: ING-INF/01 Elettronica

description: In the first part of the paper, the Y ma­trix representation is used to directly and accurately extract all the parameters of the --hybrid model. In the second part the noise sources are added to the equivalent model and the analytical expression of noise figure is obtained. This expression is used to get a full set of noise parameters to characterize the behaviour of the bipolar microwave transistors from numerical simulation.
Synthese von Glykosiden mit Lipidanker zur Untersuchung biologischer Erkennungsprozesse
Creators: name: Schmidt, Matthias
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2000
Subjects: Elektronische Publikation
Zsfassung in engl. Sprache

description: Eine Reihe wichtiger Erkennungsprozesse in biologischen Systemen basieren auf spezifischen Wechselwirkungen von terminalen Kohlenhydratresten der Glykokonjugate mit Proteinen. Untersuchungen zu Interaktionen natürlicher Glykokonjugate (z.B. Sialyl LewisX) mit ihren Rezeptoren (z.B. E-Selektin) zeigen, daß unterschiedliche terminale Kohlenhydrate mit unterschiedlichen Abständen zwischen hydrophoben Bereich und Erkennungsdomäne verantwortlich sind für eine effiziente Liganden-Rezeptor-Bindung. Diese Arbeit beschreibt neue Derivate für die Darstellung polyantennärer Clusterglykolipide. Für die Synthese von Sialyl LewisX-Analoga wählten wir O-alkylierte Pentaerythritolderivate als Grundstruktur. Der selektive Schutz der 3 Hydroxylgruppen ermöglicht die Einführung verschiedener Kopfgruppen in Form von Zuckerderivaten mit oder ohne Ethylenglykolderivaten verschiedener Länge als Spacer, um verschiedene Bindungsepitope zu simulieren. Es wurden Neoglykokonjugate mit unterschiedlichem Glykosidierungsgrad (Mono-, Bis- und Trisglykoside) synthetisiert und mit 1H-NMR und ESI-MS charakterisiert. Erste biochemische Untersuchungen zeigen einen Anstieg der Bindungsaffinität (Concanavalin A) bei Glykokonjugaten mit zwei oder 3 terminalen Kopfgruppen (Clustereffekt). Es wurde weiterhin begonnen, eine Reihe alternativer Reaktionen zur Darstellung von Clusterglykolipiden via Photoaddition von Thiolderivaten an 1-O-Allylglykoside zu entwickeln.
description: A number of important recognition processes in biological systems are based on specific interactions of terminal carbohydrate residues of glycoconjugates with proteins. The study of the interaction of natural glycoconjugates (e.g. sialyl LewisX) with their receptors (e.g. E-selectin) demonstrate that different terminal carbohydrates with different distances between the hydrophobic and the recognition domain are responsible for an efficient ligand-receptor-binding. This work describes new derivatives suitable for the synthesis of polyantennary cluster glycolipids. In order to synthesize mimetics of sialyl LewisX determinants we have chosen O-alkylated pentaerythritol as core substance. The selective protection of the three hydroxyl groups enables us to introduce various headgroups using different carbohydrates with or without ethoxy spacer of different lengths to simulate a variety in binding epitopes. Neoglycoconjugates with a certain degree of equal carbohydrates (mono-, bis- and trisglycosides) were synthesized and fully characterized by 1H-NMR and ESI-MS. First biochemical investigations demonstrate an increase of the binding affinity (concanavalin A) in case of glycoconjugates with two or three terminal headgroups (cluster effekt). A number of alternative reactions for the synthesise of cluster glycolipids via photoaddition of thiol derivatives with 1-O-allylglycosides were started to develop.
Additional file 4 of circPDE5A regulates prostate cancer metastasis via controlling WTAP-dependent N6-methyladenisine methylation of EIF3C mRNA
Creators: name: Ding, Lifeng
name: Wang, Ruyue
name: Zheng, Qiming
name: Shen, Danyang
name: Wang, Huan
name: Lu, Zeyi
name: Luo, Wenqin
name: Xie, Haiyun
name: Ren, Liangliang
name: Jiang, Minxiao
name: Yu, Chenhao
name: Zhou, Zhenwei
name: Lin, Yudong
name: Lu, Haohua
name: Xue, Dingwei
name: Su, Wenjing
name: Xia, Liqun
name: Neuhaus, Jochen
name: Cheng, Sheng
name: Li, Gonghui
Publisher: name: figshare
Year: 2022
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 4.
Application of LE-FDTD analysis to non-linear circuits, including GaAs devices
Creators: name: Stopponi, G.
name: Roselli, L.
name: Ciampolini, P.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1997
Subjects: ING-INF/01 Elettronica

description: We discuss the application of the Lumped-Eleinrrn., Finite-Difference TiitK-DumaJii (LE-FDTD) al­gorithm l.o the analysis of a planar active antenna. Through this approach, the full-wave si^na! propagation along the passive network is taken into account, at. the same time accounting for nun linear devices to be comprehensively considered. GaAs, as well as silicon, devices can he self-consist-enilv taken into account, and described either by a compact, analytical equations set, or by a distributed, numerical solution of the semiconductor transport equations. Both approaches arc illustrated in the paper: a OaAS Gunn diode is used to excite a slot, antenna, and is modeled at tbe distributed level; the same structure is then used as a frequency multiplier: in this case, non linearity is introduced by a Schot-tky diode, which is described hy a, compact equivalent circuit.  In both cases, influence of the diode placement across the sloi is briefly discussed.
A Centerless Virasoro Algebra of Master Symmetries for the Ablowitz-Ladik Hierarchy
Creators: name: Haine, Luc
name: Vanderstichelen, Didier
Publisher: name: arXiv
Year: 2011
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Representation Theory (math.RT)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We show that the (semi-infinite) Ablowitz-Ladik (AL) hierarchy admits a centerless Virasoro algebra of master symmetries in the sense of Fuchssteiner [Progr. Theoret. Phys. 70 (1983), 1508-1522]. An explicit expression for these symmetries is given in terms of a slight generalization of the Cantero, Moral and Velázquez (CMV) matrices [Linear Algebra Appl. 362 (2003), 29-56] and their action on the tau-functions of the hierarchy is described. The use of the CMV matrices turns out to be crucial for obtaining a Lax pair representation of the master symmetries. The AL hierarchy seems to be the first example of an integrable hierarchy which admits a full centerless Virasoro algebra of master symmetries, in contrast with the Toda lattice and Korteweg-de Vries hierarchies which possess only "half of" a Virasoro algebra of master symmetries, as explained in Adler and van Moerbeke [Duke Math. J. 80 (1995), 863-911], Damianou [Lett. Math. Phys. 20 (1990), 101-112] and Magri and Zubelli [Comm. Math. Phys. 141 (1991), 329-351].
Threshold production of unstable top
Creators: name: Penin, Alexander A.
name: Piclum, Jan H.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We develop a systematic approach to describe the finite lifetime effects in the threshold production of top quark-antiquark pairs. It is based on the nonrelativistic effective field theory with an additional scale rho^(1/2) m_t characterizing the dynamics of the top-quark decay, which involves a new expansion parameter rho=1-m_W/m_t. Our method naturally resolves the problem of spurious divergences in the analysis of the unstable top production. Within this framework we compute the next-to-leading nonresonant contribution to the total cross section of the top quark-antiquark threshold production in electron-positron annihilation through high-order expansion in rho and confirm the recently obtained result. We extend the analysis to the next-to-next-to-leading O(alpha_s) nonresonant contribution which is derived in the leading order in rho. The dominant nonresonant contribution to the top-antitop threshold production in hadronic collisions is also obtained.
description: 20 pages, 7 figures; v2: added a section on invariant mass cuts and one reference, minor changes in Introduction, results unchanged, matches published version
A direct coupling between the semiconductor equations describing a GaInP/GaAs HBT in a circuit simulator for the co-design of microwave devices and circuits
Creators: name: Sommet, R.
name: Perreai, Y.
name: Quere, R.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1997
Subjects: ING-INF/01 Elettronica

description: This paper describes the direct coupling between a physical device simulator and a circuit simulator based on the Harmonic Balance (Hit) technique. The semiconductor device equations adopted concern a GaInP/GaAs HBT for power applications. A full computation of the Jacobian matrix for convergence improvement has been implemented. It provides us with a powerful tool for the codesign of devices and circuits which has been successfully tested to simulate the power transfer characteristic of a device operating in class AB,
Understanding Jet Scaling and Jet Vetos in Higgs Searches
Creators: name: Gerwick, Erik
name: Plehn, Tilman
name: Schumann, Steffen
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Jet counting and jet vetos are crucial analysis tools for many LHC searches. We can understand their properties from the distribution of the exclusive number of jets. LHC processes tend to show either a distinct staircase scaling or a Poisson scaling, depending on kinematic cuts. We illustrate our approach in a detailed study of jets in weak boson fusion Higgs production.
description: 5 pages, 4 figures, 1 table. Text clarified to reflect that we applied forward-backward tagging jet selection
A novel approach to yield estimate and IMP performance optimization of microwave devices
Creators: name: Donati Guerrieri, S.
name: Bonani, F.
name: Pirola, M.
name: Ghione, G.
name: Filicori, F.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1997
Subjects: ING-INF/01 Elettronica

description: This paper presents an efficient, physics-based approach to evaluate the large-signal (LS) parametric sensitivity of microwave devices operated in (quasi) periodic conditions. The approach is based on the combined use of a two-dimensional drift-diffusion physical model and of an intermediate circuit-oriented large-signal model. The LS parametric sensitivity is then exploited to optimize the doping profile of a GaAs MESFET so as to minimize the third-order intermodulation products (IMP) in a simple large-signal amplifier. An example of yield-oriented statistical analysis of device performances with respect to random variations of technological parameters is also presented.
Metaphor, the dictionary, and the advanced learner
Creators: name: Philip, Gill
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2006
Subjects: L-LIN/12 Lingua e traduzione - Lingua inglese

description: Research into figurative language in foreign language acquisition has primarily focused on the receptive skills, where there is strong evidence to suggest that encouraging students to reflect on the metaphorical origins of figurative expressions makes learning and recall of vocabulary demonstrably more effective.  However, very little has been said about the effects of this strategy on students’ productive output. With some advanced learners’ dictionaries now also including information about conceptual metaphor, it is important that the utility of this feature be examined in more detail. This paper examines different types of figurative language produced by advanced learners of English at an Italian university. It highlights the extent to which conceptual meaning is dependent on collocation and phraseology, and suggests how this can be treated more effectively in monolingual and bilingual dictionaries.
Macroscopic quantum many-body tunneling of attractive Bose-Einstein condensate in anharmonic trap
Creators: name: Haldar, Sudip Kumar
name: Debnath, Pankaj
name: Chakrabarti, Barnali
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the stability of attractive atomic Bose-Einstein condensate and the macroscopic quantum many-body tunneling (MQT) in the anharmonic trap. We utilize correlated two-body basis function which keeps all possible two-body correlations. The anharmonic parameter ($λ$) is slowly tuned from harmonic to anharmonic. For each choice of $λ$ the many-body equation is solved adiabatically. The use of the van der Waals interaction gives realistic picture which substantially differs from the mean-field results. For weak anharmonicity, we observe that the attractive condensate gains stability with larger number of bosons compared to that in the pure harmonic trap. The transition from resonances to bound states with weak anharmonicity also differs significantly from the earlier study of Moiseyev {\it et.al.}[J. Phys. B: At. Mol. Opt. Phys. {\bf{37}}, L193 (2004)]. We also study the tunneling of the metastable condensate very close to the critical number $N_{cr}$ of collapse and observe that near collapse the MQT is the dominant decay mechanism compared to the two-body and three-body loss rate. We also observe the power law behavior in MQT near the critical point. The results for pure harmonic trap are in agreement with mean-field results. However we fail to retrieve the power law behavior in anharmonic trap although MQT is still the dominant decay mechanism.
description: Accepted in Eur. Phys. J. D (2013)
Delayed loss of stability in systems with degenerate linear parts
Creators: name: Rachinskii, Dimitri
name: Schneider, Klaus R.
Publisher: name: Weierstrass Institute
Year: 2003
Subjects: subject: singular perturbation
subject: delayed loss of stability
subject: periodic solution
subject: Hopf bifurcation
subject: 34D15
subject: 37G15

description: We study singularly perturbed scalar and planar differential equations with linear parts independent of time. The associated autonomous equations undergo a bifurcation of equilibria in scalar case and the Hopf bifurcation in case of planar systems at a bifurcation point where the zero equilibrium loses stability. We suggest natural sufficient conditions for the phenomenon of delayed loss of stability for the singularly perturbed equations and estimate the asymptotic delay. Bifurcation points, stability of the zero equilibrium, and the asymptotic delay are determined by superlinear terms in the expansions of the right-hand sides of the associated and singularly perturbed equations.
Impurity-Induced Electronic Nematic State in Iron-Pnictide Superconductors
Creators: name: Inoue, Yoshio
name: Yamakawa, Youichi
name: Kontani, Hiroshi
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We propose that impurity-induced electronic nematic state is realized above the orthorhombic structure transition temperature $T_S$ in iron-pnictide superconductors. In the presence of strong orbital fluctuations near $T_S$, it is theoretically revealed that a single impurity induces non-local orbital order with $C_2$-symmetry, consistently with recent STM/STS measurements. Each impurity-induced $C_2$ orbital order aligns along a-axis by applying tiny uniaxial pressure along b-axis. In this impurity-induced nematic phase, the resistivity shows sizable in-plane anisotropy ($ρ_b/ρ_a \sim 2$) even above $T_S$, actually observed in various "detwinned" samples. The present study indicates the existence of strong orbital fluctuations in iron-pnictide superconductors.
description: 5 pages, 4 figures
'Backgating' model including self-heating for low-frequency dispersive effects in III-V FETs
Creators: name: Santarelli, A.
name: Filicori, F.
name: Vannini, G.
name: Rinaldi, P.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1998
Subjects: ING-INF/07 Misure elettriche e elettroniche
ING-INF/01 Elettronica

description: A new approach is proposed which takes into account both traps and thermal phenomena for the modelling of deviations between static and dynamic drain current characteristics in III-V field effect transistors. The model is based on the well-known `backgating' concept and can easily be identified on the basis of conventional static drain current characteristics and small-signal, low-frequency S parameters. Experimental results confirm the accuracy of the proposed model
Local Fourier Analysis of the Complex Shifted Laplacian preconditioner for Helmholtz problems
Creators: name: Cools, Siegfried
name: Vanroose, Wim
Publisher: name: arXiv
Year: 2011
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: In this paper we solve the Helmholtz equation with multigrid preconditioned Krylov subspace methods. The class of Shifted Laplacian preconditioners are known to significantly speed-up Krylov convergence. However, these preconditioners have a parameter beta, a measure of the complex shift. Due to contradictory requirements for the multigrid and Krylov convergence, the choice of this shift parameter can be a bottleneck in applying the method. In this paper, we propose a wavenumber-dependent minimal complex shift parameter which is predicted by a rigorous k-grid Local Fourier Analysis (LFA) of the multigrid scheme. We claim that, given any (regionally constant) wavenumber, this minimal complex shift parameter provides the reader with a parameter choice that leads to efficient Krylov convergence. Numerical experiments in one and two spatial dimensions validate the theoretical results. It appears that the proposed complex shift is both the minimal requirement for a multigrid V-cycle to converge, as well as being near-optimal in terms of Krylov iteration count.
description: 20 pages
Additional file 2 of Analysis of a novel mutant allele of GSL8 reveals its key roles in cytokinesis and symplastic trafficking in Arabidopsis
Creators: name: Saatian, Behnaz
name: Austin, Ryan
name: Tian, Gang
name: Chen, Chen
name: Nguyen, Vi
name: Kohalmi, Susanne
name: Geelen, Danny
name: Cui, Yuhai
Publisher: name: figshare
Year: 2018
Subjects: subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Pharmacology
subject: Ecology
subject: Hematology
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Plant Biology
subject: Virology

description: Table S1. Segregation of homozygous essp8 seedlings in the progeny of selfed ESSP8/essp8 heterozygous plants. Table S2. The percentage of defective seeds in one silique from selfed ESSP8/essp8 heterozygous plants. Table S3. Segregation of homozygous gsl8 T-DNA insertion seedlings in the progeny of selfed heterozygous plants. Table S4. List of mutant lines and primers used for genotyping. Table S5. List of primers used for essp8 rough-mapping. Table S6. List of primers used for cloning and qPCR. (PDF 210Â kb)
Signature of the $Λ(1405)$ resonance in neutron spectra from the $K^-+d$ reaction
Creators: name: Révai, János
Publisher: name: arXiv
Year: 2012
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Neutron spectra from the reaction $K^-+d\rightarrow π+Σ+n$ were calculated in the energy range $E^{cm}_{K^-}= 0-50\ MeV$ using coupled channel Faddeev equations for the description of the $\bar KNN-πΣN$ three-body system. The aim was to trace the signature of the $Λ(1405)$ resonance in the spectra. We found, that while in the direct spectra kinematic effects mask completely the peak corresponding to the resonance, the deviation spectrum method [1] is able to eliminate kinematics and differentiate between different models of $Λ(1405)$. Four different phenomenological $\bar{K}N-πΣ$ interactions were used in order to study the effect of their pole positions on the neutron spectra.
description: Final version to appear in Few Body Systems
Glucosyltransferasen in der Bildung von Hydroxyzimtsäure-Estern in Arabidopsis thaliana
Creators: name: Meißner, Dirk
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2008
Subjects: subject: Hochschulschrift
subject: Online-Publikation
subject: Zsfassung in engl. Sprache
subject: 572.7562364

description: Das Genom von Arabidopsis besitzt vier UDP-Glucosyltransferasen, die Hydroxyzimtsäuren zu den entsprechenden 1-O-β-Glucoseestern umsetzen können, UGT84A1 (codiert durch At4g15480), UGT84A2 (At3g21560), UGT84A3 (At4g15490) und UGT84A4 (At4g15500). Zur Aufklärung der biologischen Rolle dieser Glucosyltransferasen in planta wurde die Genexpression, die UGT-Aktivität und die Akkumulation von Phenylpropanen in Arabidopsis Wildtyp Pflanzen, UGT Mutanten und Überexpressionslinien untersucht. Einzelne UGT 84A-Nullallele reduzierten den metabolischen Fluss nicht signifikant zu den akkumulierenden Produkten Sinapin (im Samen) und Sinapoylmalat (in Rosettenblättern). Für die UGT 84A2-Mutante konnte mit Hilfe einer LC-MS-Analyse qualtitative und quantitative Unterschiede im Gehalt an verschiedenen Cholin-Estern gefunden werden. Überexpression von einzelnen UGT 84A-Genen erhöhte die UGT-Enzymaktivität, zeigten dabei aber keine Änderungen im Muster der akkumulierenden HCA-Ester. Für die UGT 84A3 legten unsere Daten eine Bedeutung für den Einbau von Cumarsäure in die Zellwände nahe. Nach UV-B-Behandlung wurde die Expression der UGT 84A-Gene induziert, was zu einem transienten Anstieg von Sinapoylglucose und Sinapoylmalat führte.
description: Arabidopsis harbors four UDP-glycosyltransferases that convert hydroxycinnamates (HCAs) to 1-O-β-glucose esters, UGT84A1 (encoded by At4g15480), UGT84A2 (At3g21560), UGT84A3 (At4g15490), and UGT84A4 (At4g15500). To elucidate the role of the individual UGT84A enzymes in planta we analyzed gene expression, UGT activities and accumulation of phenylpropanoids in Arabidopsis wild-type plants, ugt mutants and overexpressing lines. Individual ugt84A null alleles did not significantly reduce the gross metabolic flux to the accumulating compounds sinapoylcholine (sinapine) in seeds and sinapoylmalate in leaves. For the ugt84A2 mutant, LC/MS analysis revealed minor qualitative and quantitative changes of several HCA choline esters and of disinapoylspermidine in seeds. Overexpression of individual UGT84A genes caused increased enzyme activities but failed to produce significant changes in the pattern of accumulating HCA esters. For UGT84A3, our data tentatively suggest an impact on cell wall-associated 4-coumarate. Exposure of plants to enhanced UV-B radiation induced the UGT84A-encoding genes and led to a transient increase in sinapoylglucose and sinapoylmalate concentrations.
Representation of the inverse of a frame multiplier
Creators: name: Balazs, Peter
name: Stoeva, Diana T.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 42C15, 47A05

description: Certain mathematical objects appear in a lot of scientific disciplines, like physics, signal processing and, naturally, mathematics. In a general setting they can be described as frame multipliers, consisting of analysis, multiplication by a fixed sequence (called the symbol), and synthesis. They are not only interesting mathematical objects, but also important for applications, for example for the realization of time-varying filters. In this paper we show a surprising result about the inverse of such operators, if existing, as well as new results about a core concept of frame theory, dual frames. We show that for semi-normalized symbols, the inverse of any invertible frame multiplier can always be represented as a frame multiplier with the reciprocal symbol and dual frames of the given ones. Furthermore, one of those dual frames is uniquely determined and the other one can be arbitrarily chosen. We investigate sufficient conditions for the special case, when both dual frames can be chosen to be the canonical duals. In connection to the above, we show that the set of dual frames determines a frame uniquely. Furthermore, for a given frame, the union of all coefficients of its dual frames is dense in $\ell^2$. We also investigate invertible Gabor multipliers. Finally, we give a numerical example for the invertibility of multipliers in the Gabor case.
description: Few statements (Theor. 4.6, Prop. 4.7) and a new section (section 6, numerical visualization of results) are added. Some text is improved, rearranged, or shortened
Analyse der Funktion des 9-Oxylipin-Stoffwechsels und von SNARE-Homologen für die Pathogenabwehr der Kartoffel
Creators: name: Eschen-Lippold, Lennart
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2008
Subjects: subject: Hochschulschrift
subject: Online-Publikation
subject: Zsfassung in engl. Sprache
subject: 571.9623952

description: In dieser Arbeit wurde der Pathogen-induzierbare 9-Lipoxygenase (StLOX1)-Weg in Kartoffel (Solanum tuberosum) charakterisiert. Dazu wurden die Gene für das erste Enzym StLOX1 und das einen Folgeschritt katalysierende Enzym 9-Divinylether-Synthase (St9DES) mittels RNA-Interferenz in ihrer Expression herabgesetzt. In Pflanzen mit stark reduzierten Mengen an 9-Oxylipinen zeigte sich, dass für die Knollenentwicklung, die Reaktion auf abiotischen Stress, sowie die Ausprägung der Infektion mit dem Kraut- und Knollenfäule-Pathogen Phytophthora infestans sowohl in der basalen als auch der Rasse-Sorte-spezifischen Resistenz keine entscheidende Beteiligung des 9-Lipoxygenase-Wegs vorliegt. Des weiteren stand die funktionelle Analyse der Kartoffel-SNARE-Homologen (soluble NSF attachment protein receptor) StSYR1 (syntaxin-related 1) und StSNAP33 (synaptosomal-associated protein 33 kDa) im Fokus. Im Vergleich zu Kontrollpflanzen zeigen RNAi-Pflanzen mit stark reduzierten Transkriptmengen in beiden Fällen einen verfrühten Seneszenz-Phänotyp, der mit erhöhten endogenen Salicylsäuremengen korreliert. Im Fall der StSYR1-RNAi-Pflanzen liegt eine erhöhte Resistenz gegen P. infestans vor, die makroskopisch mit verstärkter Nekrosenbildung und mikroskopisch mit dem Verlust der lokalen Papillenbildung einhergeht.
description: In this work, the pathogen-inducible 9-lipoxygenase (StLOX1)-pathway of potato (Solanum tuberosum) was characterized. The genes encoding the first enzyme StLOX1 and the enzyme St9DES, catalysing a subsequent step, were down-regulated in their expression by RNAinterference. Transgenic plants with strongly reduced levels of 9-oxylipins revealed no decisive role of the 9-lipoxygenase pathway for tuber development, the response to abiotic stress as well as disease development following inoculation with Phytophthora infestans, the causal agent of late blight disease, both in basal and race-cultivar-specific resistance. Furthermore, the potato SNARE-homologs (soluble NSF attachment protein receptor) StSYR1 (syntaxin-related 1) and StSNAP33 (synaptosomal-associated protein 33 kDa) were functionally characterized. Compared to control plants, RNAi plants with strongly downregulated StSYR1- and StSNAP33-expression showed an early senescence phenotype concomitant with higher endogenous salicylic acid levels. With regard to the StSYR1-RNAi plants, a higher resistance against P. infestans macroscopically correlates with enhanced necrosis formation and microscopically with a loss of papillae-formation.
Mathematical approach to large-signal modelling of electron devices
Creators: name: Filicori, F.
name: Vannini, G.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1991
Subjects: ING-INF/07 Misure elettriche e elettroniche
ING-INF/01 Elettronica

description: A general purpose mathematical approach is proposed for the large-signal modelling of microwave electron devices (e.g. MESFETs, bipolar transistors, diodes, etc.). The mathematical model, which is based on mild assumptions valid both for field effect and bipolar devices in typical large-signal operating conditions, can easily be identified through conventional measurements and is particularly suitable for nonlinear microwave circuit analysis based on harmonic balance techniques
Narrative, myth and cultural resource management in Wadeye, Northern Territory, Australia : a preliminary study
Creators: name: Kernan, Luke James Leo
Publisher: name: University of British Columbia
Year: 2014

description: Cultural resource management is an effort to revitalize culture in the present, and the aim of such endeavours is to provide stability for future generations in navigating culture. This theme runs throughout my preliminary fieldwork in Wadeye, as I sought to collect traditional narratives of the mythic “Dreaming” song cycles. One of the goals of my volunteering and fieldwork in this region was to help make history relevant to future generations of Aboriginal Australians by providing them with resources from the local Kanamkek-Yile Ngala museum. In this thesis, I explore how culture as presented in traditional myths and narratives becomes intertwined in the daily lives of Aboriginal Australians. The thesis delves heavily into the process of fieldwork as a way of engendering empathy for the social analysis of myths. The experience of the field, entering into another way of life, is central in forming an understanding for how myth and narrative play vital roles in Aboriginal Australian culture. The fieldwork here is largely from the vein of applied anthropology in seeking answers relating to the loss of narratives in the region. The drive here is to find a framework for the successful revitalization of lost stories by visiting cultural sites and reconnecting to experiences of the land. I also explore notions of ethno-poetry as a possible way of tapping into the creative potential of the Aboriginal Australian “Dreamtime.” The aim is thus to engender larger discussion in cultural resource management by centering the community in deciding its own responses and adaptation strategies in dealing with story revitalization efforts.
Gravity and compactified branes in matrix models
Creators: name: Steinacker, Harold
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A mechanism for emergent gravity on brane solutions in Yang-Mills matrix models is exhibited. Newtonian gravity and a partial relation between the Einstein tensor and the energy-momentum tensor can arise from the basic matrix model action, without invoking an Einstein-Hilbert-type term. The key requirements are compactified extra dimensions with extrinsic curvature M^4 x K \subset R^D and split noncommutativity, with a Poisson tensor θ^{ab} linking the compact with the noncompact directions. The moduli of the compactification provide the dominant degrees of freedom for gravity, which are transmitted to the 4 noncompact directions via the Poisson tensor. The effective Newton constant is determined by the scale of noncommutativity and the compactification. This gravity theory is well suited for quantization, and argued to be perturbatively finite for the IKKT model. Since no compactification of the target space is needed, it might provide a way to avoid the landscape problem in string theory.
description: 35 pages. V2: substantially revised and improved, conclusion weakened. V3: some clarifications, published version. V4: minor correction
A powerful and efficient set test for genetic markers that handles confounders
Creators: name: Listgarten, Jennifer
name: Lippert, Christoph
name: Kang, Eun Yong
name: Xiang, Jing
name: Kadie, Carl M.
name: Heckerman, David
Publisher: name: arXiv
Year: 2012
Subjects: subject: Genomics (q-bio.GN)
subject: Applications (stat.AP)
subject: Machine Learning (stat.ML)
subject: FOS: Biological sciences
subject: FOS: Computer and information sciences

description: Approaches for testing sets of variants, such as a set of rare or common variants within a gene or pathway, for association with complex traits are important. In particular, set tests allow for aggregation of weak signal within a set, can capture interplay among variants, and reduce the burden of multiple hypothesis testing. Until now, these approaches did not address confounding by family relatedness and population structure, a problem that is becoming more important as larger data sets are used to increase power. Results: We introduce a new approach for set tests that handles confounders. Our model is based on the linear mixed model and uses two random effects-one to capture the set association signal and one to capture confounders. We also introduce a computational speedup for two-random-effects models that makes this approach feasible even for extremely large cohorts. Using this model with both the likelihood ratio test and score test, we find that the former yields more power while controlling type I error. Application of our approach to richly structured GAW14 data demonstrates that our method successfully corrects for population structure and family relatedness, while application of our method to a 15,000 individual Crohn's disease case-control cohort demonstrates that it additionally recovers genes not recoverable by univariate analysis. Availability: A Python-based library implementing our approach is available at http://mscompbio.codeplex.com
description: * denotes equal contributions
Simulation and design of microwave class-C amplifiers through harmonic analysis
Creators: name: Filicori, F.
name: Monaco, V.A.
name: Naldi, C.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1979
Subjects: ING-INF/07 Misure elettriche e elettroniche
ING-INF/01 Elettronica

description: A method for analyzing microwave class-C amplifiers is proposed which satisfies the requirements of a wide application field, and, at the same time, operates with a fast runing time and without convergence problems. It is based on the partitioning of the circuit into linear and nonlinear subnetworks for which, respectively, frequency-domain and time-domain equations are written. Then, taking into account that the time-domain and frequency-domain representations are related by the Fourier series, the circuit behavior is described by means of a system of nonlinear equations whose unknowns are the harmonic components of the incident waves at all the connections. To overcome the numerical problems arising in the search for the solution of this system when strong nonlinearities are involved, a special step-by-step procedure is adopted. The problem is transformed into the search for the solution of a sequence of well-conditioned systems of equations corresponding to a sequence of well-chosen circuits obtained from the original one through progressive changes of the input signal starting from 0 up to the nominal value. The program which implements the method is also described and the results of the analysis relative to a class-C amplifier are compared with measured values
Automated microwave device characterization set-up based on a technology-independent generalized Bias System
Creators: name: Traverso, P.A.
name: Pirazzini, M.
name: Santarelli, A.
name: Filicori, F.
name: Raffo, A.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2005
Subjects: ING-INF/07 Misure elettriche e elettroniche
ING-INF/01 Elettronica

description: In this paper an automated laboratory set-up for the characterization of micro- and millimeter-wave electron devices under DC, small- and large-signal operation is described, which is based on a generalized, technology-independent bias system. The biasing parameters adopted, which are a linear combination between currents and voltages at the device ports, allow for a complete characterization of the desired empirical data (e.g. multi-frequency S-matrix) throughout all the regions in which the quiescent operation of the device can be conventionally divided, without any need for the switch between different biasing strategies. The look-up tables of experimental data obtained, which are carried out homogeneously with respect to the same couple of bias parameters, independently of the quiescent regions investigated, are particularly suitable for the characterization of empirical non-linear dynamic models for the electron device.
title: Правовой нигилизм как проблема реализации избирательных прав граждан Российской Федерации
Creators: name: Милащенко, А .М.
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2021

description: В статье проанализирована актуальная проблема избирательного права – правовой нигилизм. Автор задается вопросом касательно низкой явки на выборах. Выделены причины неучастия избирателей в выборах, приведены статистические данные, а также зарубежная практика. Автором предложены способы решения данной проблемы, а также приведены мнения исследователей касательно данной темы. Преодоление правового
нигилизма – это очень длительная работа, которая включает в себя преобразования объективных факторов жизни населения, а также это процесс, в котором формируются институты гражданского общества, благодаря работе органов государственной власти и гражданского общества, происходит и взаимосвязь. Автор приходит к выводу, что пассивное поведение населения влияет на значение конституционной демократии в негативную
сторону, необходимо преобразовать институт демократии, а также повысить правосознание граждан.
Attitudes towards insurance: the role of propensity to hold liquid asset
Creators: name: Iero, Antonino
name: Tassinari, Giorgio
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2011
Subjects: SECS-S/03 Statistica economica

description: There’s a lack of research on the relationship between families’ attitudes toward insurance and their financial behavior. The Italian insurance market appears weak with regard to non life and non motor insurance: Italy ranks only 18th in Europe in terms of the ratio between non life and non motor premiums and GDP. The propensity to subscribe to an insurance contract appears largely to depend on geographical area, qualification and job activity. Regardless of their wealth, families subscribing to a non life and non motor insurance policy show a significantly lower propensity for financial liquidity. This relationship suggests an opportunity: selling insurance products to high liquidity families offers financial industry the possibility to sell them new financial assets too. There is a final benefit for Italian families, whose high liquidity indicates risk adversity while their propensity not to buy insurance exposes them to great real risks: buying more insurance products they will be less exposed to real risks and have a better return on their financial investments.
Statement in der Expert*innen-Anhörung des Schleswig-Holsteinischen Landtages Perspektivplan-Vorschlag Schleswig-Holstein 19.02.2021 : Auswirkungen der vorgesehenen Öffnungsschritte auf Kinder und Jugendlichesowie auf den Bildungssektor
Creators: name: Voigts, Gunda
Publisher: name: HAW Hamburg
Year: 2021
Subjects: subject: Pandemie
subject: Jugendliche
subject: 15. Kinder- und Jugendbericht
subject: UN-Kinderrechtskonvention
subject: Kinder- und Jugendarbeit
subject: Bildung
subject: Jugendpolitik
subject: 360: Soziale Probleme, Sozialarbeit

description: Der Schleswig-Holsteinische Landtag hat am am 19.02.2021 zu einer Expert:innen-Anhörung eingeladen über den Perspektivplan für Schleswig-Holstein im Rahmen der Coronapandemie eingeladen. Im Themenbereich "Auswirkungen der vorgesehenen Öffnungsschritte auf Kinder und Jugendliche sowie den Bildungssektor" wurde Prof. Dr. Gunda Voigts dazu als Expertin gehört. Der Beitrag enthält ihr dort gehaltenes Statement.
No superradiance for the scalar field in the BTZ black hole with reflexive boundary conditions
Creators: name: Ortíz, L.
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 show that there is no superradiance in the rotating BTZ black hole for vanishing boundary conditions at infinity for the real scalar field
description: 9 pages. Accepted for publication in Physical Review D, 2012
MOESM1 of Highly selective cleavage C–O ether bond of lignin model compounds over Ni/CaO–H-ZSM-5 in ethanol
Creators: name: Guo, J.
name: Ma, Yu
name: Yu, Jia
name: Gao, Yu
name: Ma, Ning
name: Wu, Xiao
Publisher: name: figshare
Year: 2019
Subjects: subject: Biochemistry
subject: Genetics
subject: FOS: Biological sciences
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Information Systems not elsewhere classified
subject: Cancer
subject: Inorganic Chemistry
subject: FOS: Chemical sciences

description: Additional file 1: Figure S1. The H1NMR spectrums of three lignin model compound. (a) 2-(2-Methoxyphenoxy)-1-phenylethanol (β-O-4), (b) 2-methoxyphenyl anisole (α-O-4), and (c) 2-methoxy-1-phenylethoxybenzene.
Wild bootstrap of the mean in the infinite variance case
Creators: name: Cavaliere, Giuseppe
name: Georgiev, Iliyan
name: Taylor, A.M. Robert
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2011
Subjects: SECS-P/01 Economia politica
SECS-S/01 Statistica

description: It is well known that the standard i.i.d. bootstrap of the mean is inconsistent in a location model with infinite variance (alfa-stable) innovations. This occurs because the bootstrap distribution of a normalised sum of infinite variance random variables tends to a random distribution. Consistent bootstrap algorithms based on subsampling methods have been proposed but have the drawback that they deliver much wider confidence sets than those generated by the i.i.d. bootstrap owing to the fact that they eliminate the dependence of the bootstrap distribution on the sample extremes. In this paper we propose sufficient conditions that allow a simple modification of the bootstrap (Wu, 1986, Ann.Stat.) to be consistent (in a conditional sense) yet to also reproduce the narrower confidence sets of the i.i.d. bootstrap. Numerical results demonstrate that our proposed bootstrap method works very well in practice delivering coverage rates very close to the nominal level and significantly narrower confidence sets than other consistent methods.
Il testamento olografo. La data
Creators: name: Tampieri, Maura
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2012
Subjects: IUS/01 Diritto privato

description: Con il presente lavoro l’autrice mira a cogliere, nel requisito formale della data del testamento olografo, un valido criterio ermeneutico. La solennità della forma si adegua infatti alle ragioni di sostanza dell'atto che esprime la volontà seria e definitiva del testatore.
Motion planning based on uncertain robot states in dynamic environments : a receding horizon control approach
Creators: name: Mohandes, Ali
Publisher: name: University of British Columbia
Year: 2014

description: This thesis is concerned with trajectory generation for robots in dynamic environments with relatively narrow passages. In particular, this thesis aims at developing motion planning schemes using receding horizon control (RHC) and mixed-integer linear programming (MILP). The thesis is constructed of two phases. In the first phase, a general nonlinear RHC framework is developed utilizing existing algorithms for motion planning of a robot with uncertain states. In this phase, the motion planning problem in the presence of arbitrary shaped obstacles is tackled using nonlinear system and measurement equations. This method is then adopted to solve the problem of cooperating aerial and ground vehicles. An important application of the latter is automated wildfire suppression that is investigated as a case study in this thesis. Simulation results demonstrate that the nonlinear RHC algorithm can effectively compute an optimal trajectory while handling the system uncertainties and constraints. In the second phase, motion planning schemes for robots with uncertain states are developed under more specific assumptions (i.e., linear system and measurement equations and convex polyhedral obstacles) using receding horizon MILP (RHMILP). This phase builds upon the existing RHMILP motion planning methods by introducing two additional features including a state estimation algorithm and an obstacle avoidance constraint. First, the state estimation includes a partially closed-loop strategy to estimate the future states of the robot based on the anticipated future state measurements that can in turn help to reduce the uncertainty of the future states. Second, the obstacle avoidance constraint is designed to secure a line connecting each pair of sequential robot positions inside the configuration space (outside the obstacles) at all discrete times, analogous to maintaining line-of-sight (LOS) between each pair of sequential positions of the robot. The LOS-based obstacle avoidance is advantageous in that it can typically provide the same level of safety at time steps larger than those of the conventional approaches; hence creating trajectories which are more efficient at both planning and execution stages. Numerical simulations and experiments indicate that proper inclusion of the future anticipated measurements contributes to a less conservative (more feasible) path.