cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
On the convergence of statistical solutions of the 3D Navier-Stokes-$α$ model as $α$ vanishes
Creators: name: Bronzi, Anne C.
name: Rosa, Ricardo M. S.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: In this paper statistical solutions of the 3D Navier-Stokes-$α$ model with periodic boundary condition are considered. It is proved that under certain natural conditions statistical solutions of the 3D Navier-Stokes-$α$ model converge to statistical solutions of the exact 3D Navier-Stokes equations as $α$ goes to zero. The statistical solutions considered here arise as families of time-projections of measures in suitable trajectory spaces.
A note on degenerations of del Pezzo surfaces
Creators: name: Prokhorov, Yuri
Publisher: name: arXiv
Year: 2011
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14J10, 14E30

description: We prove that for a Q-Gorenstein degeneration $X$ of del Pezzo surfaces, the number of non-Du Val singularities is at most $ρ(X)+2$. Degenerations with $ρ(X)+2$ and $ρ(X)+1$ non-Du Val points are investigated.
description: 16 pages, LaTeX, to appear at Annales de l'Institut Fourier
Topologization of sets endowed with an action of a monoid
Creators: name: Banakh, Taras
name: Protasov, Igor
name: Sipacheva, Olga
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Topology (math.GN)
subject: FOS: Mathematics

description: Given a set $X$ and a family $G$ of self-maps of $X$, we study the problem of the existence of a non-discrete Hausdorff topology on $X$ with respect to which all functions $f\in G$ are continuous. A topology on $X$ with this property is called a $G$-topology. The answer is given in terms of the Zariski $G$-topology $ζ_G$ on $X$, that is, the topology generated by the subbase consisting of the sets $\{x\in X:f(x)\ne g(x)\}$ and $\{x\in X:f(x)\ne c\}$, where $f,g\in G$ and $c\in X$. We prove that, for a countable monoid $G\subset X^X$, $X$ admits a non-discrete Hausdorff $G$-topology if and only if the Zariski $G$-topology $ζ_G$ is non-discrete; moreover, in this case, $X$ admits $2^{\mathfrak c}$ hereditarily normal $G$-topologies.
description: 10 pages
Nebeneffekte der Nutzung eines Depressionsforums : Identifizierung und Quantifizierung problematischer Ratschläge zu Antidepressiva und den erkennbaren Umsetzungsabsichten mit Methoden des Text Minings und des Natural Language Processings
Creators: name: Niescken, Svenja Henrike
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2021
Subjects: subject: 610

description: Depressionsforen zählen zu den meistgenutzten Internetangeboten für psychiatrische Patienten. Ziel der explorativen Studie war es, die Dimension unerwünschter Ratschläge hinsichtlich der Einnahme von Antidepressiva in Depressionsforen verlässlicher einordnen zu können. Hierfür wurden automatisierte und manuelle Analyseverfahren kombiniert. Das Datenvolumen umfasste 34.061 Nutzer- und 547.546 Beitragsdaten. 1.056 initiale Beiträge im Unterforum Pharmakotherapie wurden automatisiert auf Antidepressiva, unerwünschte Arzneimittelwirkungen und Indikatoren für eine intendierte Änderung der Medikation gescreent und die Erstantworten auf Indikatoren für unerwünschte Ratschläge geprüft. 58 Diskussionsverläufe mit 601 Posts wurden manuell untersucht. Unerwünschte Ratschläge wurden sowohl in der Erstantwort als auch im weiteren Diskussionsverlauf identifiziert. Vielfach wurden diese durch eine empfohlene ärztliche Rücksprache relativiert und in der Hälfte der Fälle durch die Community korrigiert.
description: Depression forums are among the most widely used internet services for psychiatric patients. The aim of this exploratory study was to be able to more reliably classify the dimension of unwanted advice regarding the use of antidepressants in depression forums. For this purpose, automated and manual analysis processes were combined. The data volume comprised a total of 34,061 users and 547,546 posts. 1,056 initial posts in the pharmacotherapy sub-forum were automatically screened for antidepressants, adverse drug reactions and indicators of an intended change of medication, and the initial answers were automatically checked for indicators of undesirable advice. 58 threads with 601 posts were manually examined. Undesirable advice was identified both in the initial response and in the further discussion. In many cases, undesirable advice was qualified by recommending medical consultation and corrected by the community in about half of the cases.
A fully integrated SiGe low phase noise push-push VCO for 82 GHz
Creators: name: Wanner, Robert
name: Schäfer, Herbert
name: Lachner, Rudolf
name: Olbrich, Gerhard R.
name: Russer, Peter
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2005
Subjects: ING-INF/01 Elettronica

description: We present a fully monolithically integrated push-push oscillator fabricated in a production-near SiGe: C bipolar technology. The oscillator out put frequency can be varactor tuned from 80.6 GHz to 82.4 GHz. In this frequency range the measured output power is 3.5±0.4 dBm while the measured single sideband phase noise is less than−105dBc/Hz at  1MHz off set frequency. To our knowledge this phase noise level is the lowest one reported in literature so far for an VCO in this frequency band. The transistors used in this work show a maximum transit frequency fT= 200GHz and a maximum frequency of oscillation fmax =275GHz. For the passive circuitry transmission - line components, MIM-capacitors and integrated resistors are used.
A C-band high efficiency second harmonic tuned hybrid power amplifier in GaN technology
Creators: name: Colantonio, P.
name: Giannini, F.
name: Giofrè, R.
name: Limiti, E.
name: Serino, A.
name: Peroni, M.
name: Romanini, P.
name: Proietti, C.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2005
Subjects: ING-INF/01 Elettronica

description: In this contribution a C-Band 2nd harmonic tuned hybrid power amplifier utilizing a PHEMT GaN device is presented,together with technological aspects, non linear device model and adopted design criteria. The amplifier has been realised in hybrid form, exhibiting a bandwidth larger than 20% around 5.5GHz, with a minimum output power of 33 dBm, and a drain efficiency of 60% at the centre frequency.
Die psychische Gesundheit Studierender : Vergleiche zwischen Psychologie, Humanmedizin und Rechtswissenschaften an der Martin-Luther-Universität
Creators: name: Rabkow, Nadja
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2022
Subjects: subject: 610

description: Depression ist eine ernst zu nehmende und weit verbreitete psychische Erkrankung, die in allen Altersgruppen und bei allen Geschlechtern auftritt. In diesen Querschnittsstudien wurde der Zustand der psychischen Gesundheit deutscher Studierender anhand des Selbstbeurteilungsfragebogens „Beck-Depression-Inventar II“ recherchiert. Die Untersuchungen ergaben, dass die Belastung durch die selbstberichtete depressive Symptomatik unter den Medizin-, Psychologie- und Jurastudierenden im Vergleich zu der Allgemeinbevölkerung höher ist. Darüber hinaus berichten die Studien über die Korrelation zwischen dem BDI-II-Gesamtwert und bestimmten Risiko-, Stress- und Resilienzfaktoren. Die Quantität und Intensität selbstberichteter depressiver Symptome stiegen mit der Zunahme von Risikofaktoren, während sie dagegen mit Häufung von Resilienzfaktoren abnahmen. Abschließend werden Empfehlungen zur Reduktion psychischer Belastungen bei Studierenden gegeben.
description: Depression is a serious and widespread mental illness that can occur among all ages and genders. These cross-sectional studies investigate the previously disregarded state of mental health of German students based on the Beck Depression Inventory-II. The research found that the burden of self-reported symptoms of depression was higher among medical, psychology, and law students than reported in previous work in the general population. Moreover, the study reports about the correlation between the BDI-II total score and certain risk factors, stress factors and resilience factors. The self-reported depressive symptoms were higher with every accumulation of risk or stress factors and lower with each accumulation of resilience factors. Finally, based on the test results, recommendations are offered to facilitate the burdened student's life.
Noise assessment of AlGaN/GaN HEMTs on Si or SiC substrates: application to X-band low noise amplifiers
Creators: name: De Jaeger, J.C.
name: Delage, S. L.
name: Dambrine, G.
name: Di Forte Poisson, M.A
name: Hoel, V.
name: Lepilliet, S.
name: Grimbert, B.
name: Morvan, E.
name: Mancuso, Y.
name: Gauthier, G.
name: Lefrançois, A.
name: Cordier, Y.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2005
Subjects: ING-INF/01 Elettronica

description: This study regards the low noise properties of X-bandGaN-based LNAs as well as its associated robustness. Devices are processed on epilayers grown onSiC or Si substrates. The HEMTs present very low noise properties with NFmin and Gass close to 1 dB and 13 dB at 12GHz.  The robustness testsshow that the component withstands power level up to 34 dBm. A two-stages X-bandLNA is fabricated showing a noise figure of 1.7 dB with a gain of 20 dB at 10 GHz.
Thermal design of power GaN FETs in microstrip and coplanar MMICs
Creators: name: Angelini, A.
name: Furno, M.
name: Cappelluti, F.
name: Bonani, F.
name: Pirola, M.
name: Ghione, G.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2005
Subjects: ING-INF/01 Elettronica

description: The paper presents a discussion on the thermal design of integrated power GaN devices. After a short out line of some critical thermal modelling issues, design guidelines are proposed on the basis of thermal simulations; the results presented suggest that for room temperature applications SiC substrate thinning (thus implying a microstrip process)is not mandatory from a thermal standpoint. This would open the possibility for coplanar GaN MMICs, already exploited for low-noise amplifiers, also in power circuits.
Additional file 6 of Degradome sequencing reveals an integrative miRNA-mediated gene interaction network regulating rice seed vigor
Creators: name: Zhou, Shiqi
name: Huang, Kerui
name: Zhou, Yan
name: Hu, Yingqian
name: Xiao, Yuchao
name: Chen, Ting
name: Yin, Mengqi
name: Liu, Yan
name: Xu, Mengliang
name: Jiang, Xiaocheng
Publisher: name: figshare
Year: 2022
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 6: Figure S7. RT-qPCR analysis of the expression levels of plant hormone pathway related genes. Data represent mean ± standard deviation (SD; n = 3). Significant differences among samples were determined using Student’s t-test (*P < 0.05, **P < 0.01, ***P < 0.001).
Erklärvideos auf YouTube als multimodales Bildungsmedium : eine linguistische Untersuchung kommunikativer Potenziale
Creators: name: Schöne, Justine
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2022
Subjects: subject: 430

description: Die qualitativ-explorative Untersuchung beschreibt Textstrukturen und -formulierungen in Erklärvideos sowie ihr inhärenten relevante Konstituenten. Ein Korpus aus schulisch einzuordnenden Erklärvideos wurde dazu transkribiert und mithilfe verschiedener multimodaler, text-, und medienlinguistischer Analyseansätze beschrieben und interpretiert. Dabei stehen insbesondere der Kontext der Videos, die Verteilung der Modalitäten, ihre Handlungs- und Gesamttextstruktur (insbesondere das multimodale Erklären bzw. die Themenentfaltung), ihre Intertextualität und die Interaktion im Textsortennetz im Fokus. Zudem zeigt die Arbeit verschiedene Potenziale von Erklärvideos auf. Das sind zum einen die Potenziale des Mediums selbst für Schulen, Lehrende und Lernende als Bildungsmedium, aber auch als Gegenstand der Medienbildung. Zum anderen sind das Potenziale für weitere primär linguistische und ebenfalls medienwissenschaftliche, pädagogische und didaktische Forschung.
description: The qualitative-explorative study describes text structures and formulations in explanatory videos as well as their inherent relevant constituents. A corpus of videos was transcribed and described and interpreted with the help of different multimodal, text- and media-linguistic methods of analysis. In particular, the context of the videos, the distribution of modalities, their narrative and textual structure (especially the multimodal explanation and the unfolding of topics), their intertextuality, and the interaction in the network of text types are in the focus of attention. In addition, the paper shows different potentials of explainer videos. On the one hand, these are the potentials of the medium itself for schools, teachers and learners as an educational medium, but also as a subject of media education. On the other hand, these are potentials for further primarily linguistic and also media-scientific, pedagogical and didactic research.
Messianism, Exodus, and the Empty Signifier of European Integration
Creators: name: Somek, Alexander
name: Rendl, Jakob
Publisher: name: Zenodo
Year: 2019

description: In most his most recent accounts of European integration, J.H.H. Weiler claims that Europe was built with Messianic fervor. After the destruction and evil wrought by the Second World War, Europe was supposed to be a ‘promised land’. The article examines how Weiler conflates the narrative of the exodus with the Messianic leap into a different aeon and concludes that they have to be held distinct. It also suggests that Weiler’s fusion of two distinct religious ideas betrays the force of ‘Europe’ as an ‘empty signifier’ (Laclau) of integration.
Selbstentladungsverhalten und Verlustmechanismen von P(VDF-HFP) für den Einsatz als kapazitiver Energiespeicher
Creators: name: Band, Tino
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2023
Subjects: subject: 530

description: In dieser Dissertation wird das ferroelektrische Copolymer Polyvinylidenfluorid-co-Hexafluorpropylen (P(VDF-HFP)) untersucht, welches ein vielversprechendes Matrixmaterial für Nanokompositkondensatoren ist. Der Schwerpunkt liegt auf der Analyse der Energiespeichereigenschaften, insbesondere auf den Verlustmechanismen und dem Selbstentladungsverhalten, bei hohen elektrischen Feldern unter Verwendung neuer dielektrischer Messmethoden. Dabei werden die Energiespeichereigenschaften aus zyklischen D(E)-Kurven unter Berücksichtigung einer elektrischen Leitfähigkeit interpretiert, was zusätzlich eine Vergleichbarkeit dieser Eigenschaften zwischen verschiedenen Dielektrika ermöglicht. Darüber hinaus wird eine neue Methode zur direkten Messung der Selbstentladezeit vorgestellt. Die gewonnenen Erkenntnisse tragen dazu bei, die Energiespeichereigenschaften polymerbasierter Dielektrika gezielt zu optimieren und deren Einsatz als effiziente Energiespeicher voranzutreiben.
description: This dissertation investigates the ferroelectric copolymer poly(vinylidene fluoride-hexafluoropropylene) (P(VDF-HFP)), which is a promising matrix material for nanocomposite capacitors. The focus is on the analysis of the energy storage properties, in particular the loss mechanisms and self-discharge behaviour, at high electric fields using new dielectric measurement methods. In this context, the energy storage properties are interpreted from cyclic D(E) curves considering an electrical conductivity, which additionally enables a comparability of these properties between different dielectrics. Furthermore, a new method for the direct measurement of the self-discharge time is presented. The knowledge gained contributes to the targeted optimisation of the energy storage properties of polymer-based dielectrics and to advancing their use as efficient energy storage devices.
Impact of electron correlation on light-induced demagnetization
Creators: name: Périé De Barros, Tomás
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2023
Subjects: subject: 530

description: The field of laser-induced ultrafast demagnetization has gathered a lot of attention for its possible technological applications. At the ab initio level, most DFT studies in this area use the local spin-density approximation, known to poorly describe the electronic structure of 3d transition metals. We employ the Hubbard U correction, to better account for Coulomb correlations among the localized d electrons and show that these correlations alter significantly the amount of demagnetization in both ferro- and antiferromagnetic materials. We use it also as a tool to investigate the part played by several laser parameters. At the LSDA level with frozen ions the demagnetization is due to SOC mediated spin flips after optical excitations. This means that the rate of demagnetization depends critically on several parameters of the laser pulse used. Changes in pulse duration and shape influence significantly the outcome. We relate these findings to the electronic structure of the material.
description: Das Gebiet der ultraschnellen Entmagnetisierung hat aufgrund seiner möglichen technologischen Anwendungen große Aufmerksamkeit erregt. Die meisten Ab-initio-DFTStudien in diesem Bereich verwenden die LSDA, die bekanntermaßen die elektronische Struktur von 3D-Übergangsmetallen schlecht beschreibt. Wir verwenden die Hubbard-U-Korrektur um Coulomb-Korrelationen zwischen den lokalisierten d-Elektronen besser zu berücksichtigen und zeigen, dass diese Korrelationen das Ausmaß der Entmagnetisierung sowohl in ferro- als auch in antiferromagnetischen Materialien erheblich verändern. Wir nutzen es auch um die Rolle verschiedener Laserparameter zu untersuchen. Auf der LSDA-Ebene mit eingefrorenen Ionen ist die Entmagnetisierung auf SOC-vermittelte Spinumschläge nach optischen Anregungen zurückzuführen. So die Entmagnetisierungsgeschwindigkeit entscheidend von mehreren Parametern des verwendeten Laserpulses abhängt. Wir beziehen diese Erkenntnisse auf die elektronische Struktur des Materials.
Investigating the role of structural determinants in shaping sex workers' reproductive health access and outcomes
Creators: name: Duff, Katherine Putu
Publisher: name: University of British Columbia
Year: 2015

description: Background and objectives: While sex workers are disproportionately impacted by reproductive health inequities, a significant knowledge gap regarding the contextual drivers of sex workers’ broader reproductive health access and outcomes remains. This dissertation therefore sought to disentangle the role of multiple, and intersecting structural factors on sex workers’ ability to exercise their reproductive rights. Specifically, this dissertation’s objectives were to: explore the structural correlates of sex workers’ pregnancy intentions; investigate the influences of community organization and venue-based features on indoor sex workers’ ability to negotiate and use contraceptives; and examine the structural correlates of accessing cervical screening. Methods: This dissertation drew on data collected from AESHA (An Evaluation of Sex Workers’ Health Access), an open prospective cohort of street- and off-street sex workers across Metro Vancouver, Canada. Bivariable and multivariable regression methods, using generalized estimating equations for longitudinal data, were employed to examine the associations between intersecting structural, community organization, venue-based, interpersonal and individual-level factors and various reproductive health access and outcomes. Spatial analysis using geographical information systems (GIS) were used to examine geographical correlates of reproductive health services access. Results: This dissertation found that sex workers exhibited pregnancy desires similar to that of the general population, with access to off-street venues, inconsistent condom use by clients and intimate partner violence among the important factors shaping these desires. The availability of supportive indoor work features and increased social cohesion increased sex workers’ ability to negotiate for and use condoms. Finally, this dissertation documented suboptimal cervical cancer screening access among HIV seropositive and sero-negative sex workers. While barriers to health care services in general reduced odds of cervical cancer screening, access to screening via outreach models increased odds of screening. Conclusion: Structural factors play a pivotal role in shaping access to reproductive health services and sex workers’ negotiation of their sexual and reproductive health. Given the Canadian government is in the process of revising its sex work legislation, this study offers critical insights into how structural interventions including safer workplace models, sex worker-led integrated HIV/sexual and reproductive health services within a decriminalized legal framework can promote positive sexual and reproductive health.
A simple technique for measuring the thermal impedance and the thermal resistance of HBTs.
Creators: name: Lonac, J.A.
name: Santarelli, A.
name: Melczarsky, I.
name: Filicori, F.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2005
Subjects: ING-INF/01 Elettronica

description: This paper presents a new and simple method for characterizing the thermal behavior ofHeterojunction Bipolar Transistors, based on DC, AC andlow frequency small signal measures of H (hybrid)parameters. Static characterization of the thermal behavioris achieved through the calculation of a thermal resistance, while a thermal impedance is used to describe thermaldynamic behavior. Validation results for the method obtained from both simulations and experimental data areincluded in the paper for a 10x2x40 µm InGaP/GaAs power HBT.
Marginal topological properties of graphene: a comparison with topological insulators
Creators: name: Li, Jian
name: Martin, Ivar
name: Buttiker, Markus
name: Morpurgo, Alberto F.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The electronic structures of graphene systems and topological insulators have closely-related features, such as quantized Berry phase and zero-energy edge states. The reason for these analogies is that in both systems there are two relevant orbital bands, which generate the pseudo-spin degree of freedom, and, less obviously, there is a correspondence between the valley degree of freedom in graphene and electron spin in topological insulators. Despite the similarities, there are also several important distinctions, both for the bulk topological properties and for their implications for the edge states -- primarily due to the fundamental difference between valley and spin. In view of their peculiar band structure features, gapped graphene systems should be properly characterized as marginal topological insulators, distinct from either the trivial insulators or the true topological insulators.
description: This manuscript will be published on the Proceedings of the 2010 Nobel Symposium on Graphene and Quantum Matter
Frequency response enhancement of a single strained layer SiGe phototransistor basedon physical simulations
Creators: name: Moutier, F.
name: Polleux, J.L.
name: Rumelhard, C.
name: Schumacher, H.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2005
Subjects: ING-INF/01 Elettronica

description: An original approach based on a physical model is used to evaluate opto-microwave performances of avertically illuminated single strained layer SiGe HPT. Analysis of optomicrowave performance is presented at 940nm. The contribution of each regionon the dynamic performances is studied. Frequency response enhancement is shown for base optical detection first and also by wavelength analysis while maintaining whole component detection. Increases up to a 9. 8 factor for the transition optical frequency (fTopt)in phototransistor mode are presented, reaching respectively 19.7 GHz and 15.3 GHz.
A comprehensive class A to B power and load-pull characterization of GaN HEMT son SiC and sapphire substrates
Creators: name: Camarchia, V.
name: Donati Guerrieri, S.
name: Pirola, M.
name: Teppati, V.
name: Ghione, G.
name: Peroni, M.
name: Lanzieri, C.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2005
Subjects: ING-INF/01 Elettronica

description: An extensive power characterization of devices fabricated on GaN grown on SiC and sapphire substrates has been carried out, including powers weep and load-pull measurements in different bias conditions from class A to class B. An active load-pull bench optimized for high voltage and high power measurements allows to extend the load-pull characterization to the whole Smith chart, and to localize the optimum load conditions even for devices with almost reactive optimum terminations. The characterization procedure allows to verify scaling rules and the effects of defects and thermal degradation on the device power performances. The results of the SiC and sapphire-based devices show that, on one side, SiC-based devices exibit state-of-the-art performances in Class A, and, on the other side, low-cost sapphire-based devices, when biased in high efficiency classes, can be viable candidates for medium power applications, despite the higher thermal resistivity of sapphire compared with the one of SiC.
The Imaginary and the Unconscious: Situating Constitutional Pluralism
Creators: name: Lev, Amnon
Publisher: name: Zenodo
Year: 2020

description: The article interrogates Neil Walker’s theory of constitutional pluralism in order to bring out the importance of ideas for how we theorise the EU legal order. To that end, the article introduces two conceptual tools or prisms, the imaginary and the unconscious. The first part of the article situates Walker’s work in relation to the body of state-centric constitutional theory. It shows the steps Walker takes to attach his theory to past constitutionalisms, and it argues that the focus on theory leads him to blank out the question of state practice. The second part of the article considers the ideas and conceptual moves that pass from the body of constitutional theory to Walker’s theory. What the analysis brings into view is a stock of basic ideas, an imaginary around which Walker’s theory revolves. In the third part the article shows that the continuity between past and present formats of constitutional theory rests upon a determinate, and historically specific, intuition of political life. It argues that the changes Walker shall make to his theory can be explained in terms of the passing of a specific historical conjuncture, in which law could transcribe politics and keep economic rationality at bay.
On higher derivative corrections to Wess-Zumino and Tachyonic actions in type II super string theory
Creators: name: Hatefi, Ehsan
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We evaluate in detail the string scattering amplitude to compute different interactions of two massless scalars, one tachyon and one closed string Ramond-Ramond field in type II super string theory. In particular we find two scalar field and two tachyon couplings to all orders of $α'$ up to on-shell ambiguity. We then obtain the momentum expansion of this amplitude and apply this infinite number of couplings to actually check that the infinite number of tachyon poles of S-matrix element of this amplitude for the $p=n$ case (where $p$ is the spatial dimension of a D$_p$-brane and $n$ is the rank of a Ramond-Ramond field strength) to all orders of $α'$ is precisely equal to the infinite number of tachyon poles of the field theory. In addition to confirming the couplings of closed string Ramond-Ramond field to the world-volume gauge field and scalar fields including commutators, we also propose an extension of the Wess-Zumino action which naturally reproduces these new couplings in field theory such that they could be confirmed with direct S-matrix computations. Finally we show that the infinite number of massless poles and contact terms of this amplitude for the $p=n+1$ case can be reproduced by Chern-Simons, higher derivative corrections of the Wess-Zumino and symmetrized trace tachyon DBI actions.
description: 51 pages, some refs and comments added, typos are removed. Almost all ambiguities in BPS and non-BPS effective actions have been addressed
Characterization of a Candida albicans isolate from a recurrent cervical lymphadenitis patient
Creators: name: Zhang, Chengzhen
name: Wang, Wenjuan
name: Kong, Qingtao
name: Liu, Fang
name: Chen, Jiangye
name: Sang, Hong
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Space Science
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Environmental Sciences not elsewhere classified
subject: Ecology
subject: Biological Sciences not elsewhere classified
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Virology
subject: Computational Biology

description: Candida albicans is the most frequently isolated opportunistic fungal pathogen in humans. However, patients with cervical lymphadenitis caused by Candida infection are rarely reported, and few studies have focused on the mechanisms underlying chronic Candida infection. In this study, we isolated a C. albicans strain (JL01) from a recurrent cervical lymphadenitis patient. The clinical isolate was identified by morphological observation and confirmed by DNA sequencing of the internal transcribed spacer (ITS) regions. Strain JL01 is resistant to azole antifungal drugs, but sensitive to amphotericin B. The strain is able to adapt to oxidative and osmotic stresses but is defective in filamentous and invasive growth. The strain displays attenuated virulence in a murine systemic infection model. RNA-sequencing analysis revealed that JL01 has a distinct gene expression profile compared with C. albicans reference strain SC5314; hundreds of transcripts were significantly dysregulated, including those related to morphogenesis and pathogenesis. Taken together, our clinical, virulence, morphological, and biological analyses suggest that the azole resistance, oxidative and osmotic stress tolerance, invasive defect, hypovirulence, and impaired interaction with the host immune system of strain JL01 may correlate with its ability to cause cervical lymphadenitis in the patient. Our research may contribute to elucidating the mechanism(s) underlying the drug resistance and immune escape of C. albicans in chronic fungal infection.
A GaAs distributed amplifier with an output voltage of 8.5Vpp for 40Gb/s modulators
Creators: name: Häfele, M.
name: Trasser, A.
name: Beilenhoff, K.
name: Schumacher, H.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2005
Subjects: ING-INF/01 Elettronica

description: In this paper, we report on a Distributed Amplifier (DA)with positive gain slope and 8.5 Vpp out put voltage swing at 20 GHz. This makes the amplifier suitable for driving LiNbO3 modulators. The amplifier consists of six cascode cells and is fabricated in a commercially available 150nm GaAs power pHEMT technology. Gain equals to 9.8 dB at low frequencies and rises up to 12.8 dB at 38GHz. This amplifier is then cascaded with a preamplifier. Losses at high frequencies due to cascading are compensated by the positive gain slope of the amplifier described here. The cascaded amplifiers exhibit again of 19.5 dB and a bandwidth of 38GHz with a flat frequency response of ±0.6dB up to 28 GHz.
Reassessing the Canon: “fixed” phrases in general reference corpora
Creators: name: Philip, Gill
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2006
Subjects: L-LIN/01 Glottologia e linguistica
L-LIN/12 Lingua e traduzione - Lingua inglese

description: This paper sets forth the argument for revisiting fixed phrases in the light of the knowledge that their fixedness is not necessarily something to be taken for granted.  It focuses on the location and analysis of variant forms in general reference corpora.  Existing phraseological structures, including collocational frameworks, idiom schemas and semi-prepackaged phrases, are introduced by way of background before a procedure for retrieving non-canonical forms of fixed expressions in general reference corpora is presented.  Some implications relating to the study of variant forms are presented, along with suggestions for future research directions.
Pharmakokinetik von Cefuroxim in der Wirbelsäule
Creators: name: Okoniewski, Richard
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2022
Subjects: subject: 610

description: Um das Auftreten von postoperativen Infektionen bei Wirbelsäulenoperationen zu reduzieren, werden Patienten prophylaktisch mit Antibiotika behandelt. Es wurde untersucht, ob wirksame Knochen- und Bandscheibenkonzentrationen von Cefuroxim erreicht werden. Patienten, die sich einer Wirbelsäulenoperation unterzogen (N = 40; 55 % männlich) wurden präoperativ mit 1,5 g Cefuroxim vorbehandelt. Wir untersuchten die Plasmapopulationskinetik und die Knochen- und Bandscheibenkonzentrationen von Cefuroxim mittels HPLC. Die Plasmakinetik von Cefuroxim wurde bei 40 Patienten unter Verwendung von populations kinetics analysiert. Die Cefuroxim-Konzentrationen in Wirbelknochen und Bandscheiben war 9,6 ± 1,3 bzw. 8,9 ± 1,1 μg/g. Ein Großteil der Patienten erreichte ausreichende Konzentrationen von Cefuroxim in den verschiedenen Kompartimenten. Jedoch konnten nicht alle Patienten Konzentrationen über dem empfohlenen Grenzwert für empfindliche Keime zum Zeitpunkt der Operation erreichen.
description: To reduce the incidence of peri- or postoperative infections in spine surgery, patients are prophylactically treated with antibiotics. Here, we wanted to know whether effective bone and intervertebral disc concentrations of cefuroxime are reached. Patients undergoing surgery of spine (N = 40; 55% male) were pretreated with 1.5 g cefuroxime before surgery. We studied plasma population kinetics and bone and intervertebral disc concentrations of cefuroxime using HPLC. The plasma kinetics of cefuroxime in 40 patients was analysed using a population approach. Cefuroxime concentrations invertebral bone and intervertebral discs were calculated as 9.6 ± 1.3 and 8.9 ± 1.1 μg/g, respectively. Even if a majority of patients undergoing spine surgery probably achieved adequate concentrations of cefuroxime, not all patients reached bone concentrations of cefuroxime above a recommended breakpoint for susceptible germs at the time of surgery.
On the New German Ideology
Creators: name: Wilkinson, Michael A.
Publisher: name: Zenodo
Year: 2020

description: Postwar Europe is partly reconstituted by a fear of democratic freedom, and a desire for political and economic stability. Constitutional relations are transformed over time through a mixture of political authoritarianism and economic liberalism. This takes place in a combination of domestic and supranational developments. The transformation also has a utopian dimension, and outlining its utopianism can help identify its ideological character. It is captured by such related terms as ‘postpolitics’, ‘post-nationalism’, ‘post-sovereignty’ and ‘the ‘end of history’. These terms all point to the way in which authoritarian liberalism is maintained not only – and perhaps not even predominantly - through coercion and consent but also in the grey area in between, namely through practices and beliefs that suggest politics can be transcended and the medium of law reign supreme. We may call this the new German ideology. It becomes a dominant trope in the European constitutional imagination. Although it is unsettled after Maastricht and enters a critical phase through the financial crisis, the new German ideology remains relatively resilient. It benefits from the support of a critical theory that has lost its moorings, and a political system that is able to incorporate aspects of authoritarian populism, even as the centre ground appears increasingly fragile.
Antiferrosmectic ground state of two-component dipolar Fermi gases -- an analog of meson condensation in nuclear matter
Creators: name: Maeda, Kenji
name: Hatsuda, Tetsuo
name: Baym, Gordon
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We show that an antiferrosmectic-C phase has lower energy at high densities than the non-magnetized Fermi gas and ferronematic phases in an ultracold gas of fermionic atoms, or molecules, with large magnetic dipole moments. This phase, which is analogous to meson condensation in dense nuclear matter, is a one-dimensional periodic structure in which the fermions localize in layers with their pseudospin direction aligned parallel to the layers, and staggered layer by layer.
description: 4 pages, 3 eps figures. Title and abstract modified. Text is rearranged
Explicit Orbit Classification of Reducible Jordan Algebras and Freudenthal Triple Systems
Creators: name: Borsten, L.
name: Duff, M. J.
name: Ferrara, S.
name: Marrani, A.
name: Rubens, W.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Rings and Algebras (math.RA)
subject: High Energy Physics - Theory (hep-th)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We determine explicit orbit representatives of reducible Jordan algebras and of their corresponding Freudenthal triple systems. This work has direct application to the classification of extremal black hole solutions of N = 2, 4 locally supersymmetric theories of gravity coupled to an arbitrary number of Abelian vector multiplets in D = 4, 5 space-time dimensions.
description: 18 pages. Updated to match published version
Caratterizzazione Radiologica di Tessuti Tumorali
Creators: name: Baldazzi, Giuseppe
name: Masetti, Simone
name: Rossi, Pier Luca
name: Roma, Laura
name: Nicoletti, Giordano
name: Lollini, Pier Luigi
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2006
Subjects: FIS/07 Fisica applicata (a beni culturali, ambientali, biologia e medicina)

description: Nuove tecniche radiologiche sono allo studio con l’obiettivo di evidenziare precocemente le patologie tumorali mediante imaging effettuato con due o più fasci di raggi X monocromatici o quasi-monocromatici a diverse energie. Tale metodica è nota come Multi-Energy Radiology. Anche presso il Dipartimento di Fisica dell’Università di Bologna e con la collaborazione del Policlinico Universitario S. Orsola Malpighi sono allo studio metodiche radiologiche multi-energy.
Tuttavia, queste nuove metodologie richiedono la conoscenza delle bande di energia in cui l’assorbimento dei raggi X da parte del tessuto tumorale eventualmente differisce significativamente da quello dei tessuti sani. Principalmente per questo motivo è stata sviluppata la tecnologia necessaria ed è iniziata la sistematica caratterizzazione radiologica di molti tipi di tessuti sani e neoplastici, murini e umani allo scopo di costituire un catalogo delle finestre di energia in cui sarà possibile applicare la tecnica multi-energy.
La caratterizzazione radiologica dei tessuti consiste nella misura sperimentale del coefficiente di attenuazione lineare dei tessuti patologici e dei corrispondenti tessuti sani in una banda di energia compresa tra circa 10 keV e 70 keV. In tale banda è possibile operare la tecnica multi-energy con fasci quasi-monocromatici che consente di ricostruire il numero atomico efficace e persino la composizione chimica del tessuto irradiato.
I risultati dello studio potranno anche essere inseriti nei programmi per la ricerca automatica delle patologie che oggi vengono sviluppati – mediante tecniche di pattern recognition – quale ausilio al radiologo. L’utilizzo dei dati di attenuazione consentirebbe di aggiungere al puro riconoscimento morfologico delle patologie un’ulteriore parametro di differenziazione dal tessuto sano.
Sviluppo di un Sistema Spettrometrico OnLine e di un Rivelatore “Compton Camera” per la Spettrometria dei RX
Creators: name: Baldazzi, Giuseppe
name: Rossi, Pier Luca
name: Masetti, Simone
name: Roma, Laura
name: Golfieri, Rita
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2006
Subjects: FIS/07 Fisica applicata (a beni culturali, ambientali, biologia e medicina)

description: Ci si propone di iniziare la sperimentazione clinica di uno spettrometro online in grado di fornire – visivamente sul pannello di controllo e in forma digitale su card dosimetrica – lo spettro dei RX emessi in ogni singola esposizione diagnostica.
Per mezzo dell’analisi differenziale (spettrometria) del fascio diviene possibile: 1- modulare con opportuni filtri il fascio al fine di ottimizzare l’imaging in ogni specifico esame diagnostico diminuendo nel contempo la dose al paziente; 2- riprodurre lo spettro del fascio per ottenere immagini qualitativamente e quantitativamente confrontabili; 3- misurare con precisione tutti i parametri di qualità del fascio (kVp, esposizione, energia media, energia equivalente, S.E.V. del fascio); 4- effettuare la dosimetria del paziente (ESD per ogni energy bin); 5- registrare lo spettro di ogni esposizione radiologica ricevuta dal paziente (card radiologica) nel corso della sua vita clinica.
Per la piena operatività del metodo è necessario lo sviluppo di una apparecchiatura (Compton camera) per la verifica periodica della calibrazione del sistema spettrometrico online. Questo obiettivo può essere raggiunto mediante la lettura del fascio RX diffuso per effetto Compton a un preciso angolo e quindi ricostruito.
Sviluppo di una SPECT Camera per lo studio di Radiofarmaci “intelligenti” su piccoli animali
Creators: name: Baldazzi, Giuseppe
name: Bollini, Dante
name: Navarria, Francesco Luigi
name: Pancaldi, Giulio
name: Perrotta, Andrea
name: Zuffa, Mirco
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2006
Subjects: FIS/07 Fisica applicata (a beni culturali, ambientali, biologia e medicina)

description: L'uso di radiofarmaci, tra le molteplici applicazioni delle radiazioni, trova completa giustificazione in campo medico. I radiofarmaci sono sostanze chimiche che, in quanto farmaci, hanno la proprietà di interagire specificatamente con il sistema biologico e che, contenendo nella loro struttura un atomo di un nuclide radioattivo emittente gamma (radiazione scarsamente assorbita dai tessuti biologici), consentono di seguirne il percorso biologico per mezzo di idonei rivelatori esterni. È così possibile costruire una serie di immagini, raccolte in tempi successivi, che individua la distribuzione del radiofarmaco nel corpo e ne evidenzia il progredire del metabolismo. In questo modo è possibile avere indicazioni, non solo morfologiche di organi e apparati, ma soprattutto informazioni sulla loro funzionalità.

L'informazione clinica che si ottiene dall'analisi delle immagini scintigrafiche, dipende sostanzialmente dalle proprietà biologiche che il radiofarmaco possiede una volta iniettato in vivo. Se il radiofarmaco ha inoltre la proprietà di fissarsi specificamente in cellule tumorali, esso può diventare anche radioterapeutico. Basta infatti utilizzare nella "marcatura" un radionuclide che emetta radiazioni adatte alla distruzione delle cellule tumorali (radiazioni corpuscolari a corto range nella materia biologica) perché il radiofarmaco affine ad esse, iniettato in vivo, trasporti l'agente terapeutico specificamente nella zona di azione.
Interesse in causa ed incapacità a testimoniare: l'interpretazione lata della giurisprudenza
Creators: name: Arrigoni, Caterina
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2011
Subjects: IUS/15 Diritto processuale civile

description: L’autore commenta una pronuncia del Tribunale di Bologna, che sembra dare un’interpretazione lata della norma sull’incapacità a testimoniare. Dopo aver esaminato le elaborazioni dottrinali e giurisprudenziali materia, analizza la posizione del socio accomandante di un s.a.s. rispetto all'art. 246 c.p.c. e la rilevanza che a tal fine può assumere l’eventuale estinzione della società.
Valorizza, infine, l’idea che le norme che limitano il diritto di difendersi provando, costituzionalmente garantito, siano interpretate restrittivamente.
Decisione secondo diritto e arbitrato irrituale
Creators: name: Arrigoni, Caterina
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2011
Subjects: IUS/15 Diritto processuale civile

description: L’autore commenta una pronuncia del tribunale di Bologna che ritiene la pronuncia secondo diritto incompatibile con l’arbitrato irrituale. Analizza come la riconduzione dell’arbitrato irrituale all’equità discenda da una impostazione del fenomeno su base prettamente negoziale che aveva trovato fortuna agli inizi delle elaborazioni dottrinali in materia. Dimostra come, in realtà, la decisione secondo diritto non si affatto incompatibile con l’arbitrato irrituale, sia esso ricostruito su chiave processualista che negozialista.
Herstellung makroporöser Glasmonolithe durch Phasenseparation und selektive Extraktion chemisch modifizierter Natriumborosilicatgläser
Creators: name: Sander, Stephan A. H.
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2021
Subjects: subject: 540

description: Im Rahmen der Arbeit wurden poröse Glasmonolithe durch thermisch induzierte Phasenseparation und selektive Extraktion aus selbst erschmolzenen Natriumborosilicatgläsern hergestellt, welchen vor der Schmelze zum Teil weitere Zusätze, beigemischt wurden. Die Zusammensetzung ist dabei der wesentliche Einflussfaktor auf die Eigenschaften der Materialien. Der Fokus liegt darauf, poröse Gläser in monolithischer Form mit sehr großen Porendurchmessern herzustellen. Untersucht wurden die Gläser in verschiedenen Stadien des Herstellungsprozesses, die Ergebnisse werden anschließend einzeln und in Beziehung zueinander diskutiert, da die zusätzlichen Glaskomponenten verschiedene Eigenschaften gleichzeitig beeinflussen. Mit den Ergebnissen konnte ein bisher in der Literatur nicht beschriebener Phasenwachstumsprozess gezeigt werden, außerdem, dass das Phasenwachstum auch bei sehr langer Dauer der Phasenseparation nicht limitiert ist. Geeignete Prozessparameter zur Herstellung stabiler Monolithe supramakroporöser Gläser werden gezeigt und diskutiert.
description: In this work, porous glass monoliths were synthesized by thermally induced phase separation and selective leaching of self-molten sodium borosilicate glasses, to which further additives were partially added before the melt. The resulting composition is the main influencing factor on the properties of the (porous) glasses that was investigated. The focus, however, is the synthesis porous glasses in monolithic form (rods, cylinders, etc.) with very large pore diameters, so that especially suitable conditions are determined and then used as general parameters of the synthesis procedure. The glasses were analyzed in different stages of the manufacturing process in order to be able to examine different changes in properties. The results are then discussed individually and in relation to one another. With the results, a phase growth process not previously described in the literature could be demonstrated. It was also shown that the phase growth is not limited even if the heat applied phase separation times is very long. Suitable process parameters for the production of stable monoliths of macroporous glasses are shown and discussed.
Riflessioni sulla natura dell'arbitrato irrituale
Creators: name: Arrigoni, Caterina
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2011
Subjects: IUS/15 Diritto processuale civile

description: L’autore ripercorre l’annoso problema della natura dell’arbitrato irrituale, che nato nella prassi sotto il vigore del codice del 1865 deve la sua diffusione alla assenza di vincoli e controlli statuali. Esamina le teorie negozialiste e processualiste, senza tralasciare la impostazione di chi propugna una reductio ad unum delle due figure di arbitrato.
Analizza il contenuto dell’art. 808-ter c.p.c. ed evidenzia come tale norma delinei un procedimento volto ad ottenere un giudizio, e non una transazione, nel rispetto delle garanzie imprescindibili.