cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Massenspektrometrische Untersuchungen zur Struktur der Peroxisom-Proliferator-aktivierten Rezeptoren-α und -β/δ
Creators: name: Schwarz, Rico
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2017
Subjects: subject: 615

description: Die Peroxisom-Proliferator-aktivierten Rezeptoren (PPAR) aus der Familie der Kernrezeptoren sind an der Entstehung verschiedener Krankheiten wie Diabetes mellitus Typ II, Dyslipidämie und Krebs beteiligt.Um die physiologischen Funktionen der PPARs besser zu verstehen, sind Strukturdaten unerlässlich.Seit einigen Jahren wird für die Identifizierung der dreidimensionalen Strukturen von Proteinen und Proteinkomplexendie Strategie der chemischen Quervernetzung in Kombination mit Massenspektrometrie angewendet.In dieser Arbeit wurden durch einen spezifischen Austausch von natürlichen Aminosäuren gegen photoaktivierbare Aminosäuren und dem Einsatz von Quervernetzungsreagenzien die dreidimensionalen Strukturen der beiden Subtypen PPAR-α und -β/δ in An-und Abwesenheit von spezifischen Liganden untersucht.Somit konnten Konformationsänderungen der Ligandenbindungsdomänen und für PPAR-β/δerstmalig auch Strukturdaten über den hochflexiblen N-Terminus gewonnen werden.
description: The peroxisome-proliferator activated receptors (PPARs) are members of the nuclear receptor family. They are involved in the development of a number of diseases such as type 2 diabetes, dyslipidemia, and cancer.As such, PPARs are important targets for drug development necessitated a detailed understanding of the interaction between PPARs and their protein binding partners. During the last 15 years, chemical cross-linking combined with mass spectrometry has evolved into an alternative tool to obtain structural information of a protein or protein complex. Aim of this work was to obtain three-dimensional structural information of PPAR-α and -β/δ upon ligand binding by chemical cross-linking and by specifically incorporating photoreactive amino acids. Therefore, conformational changes upon ligand binding as well as additional data of the highly flexible N-terminus of PPAR-β/δwere elucidated.
The physics of the fundamental metallicity relation
Creators: name: Dayal, Pratika
name: Ferrara, Andrea
name: Dunlop, James S.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present a simple, redshift-independent analytic model that explains the local Fundamental Metallicity Relation (FMR), taking into account the physical processes of star formation, inflow of metal-poor intergalactic medium (IGM) gas, and the outflow of metal rich interstellar medium (ISM) gas. We show that the physics of the FMR can be summarised as follows: for massive galaxies with stellar mass M_* >= 10^11 solar masses, ISM metal enrichment due to star formation is compensated by inflow of metal poor IGM gas, leading to a constant value of the gas metallicity with star formation rate (SFR); outflows are rendered negligible as a result of the large potential wells of these galaxies. On the other hand, as a result of their smaller SFR, less massive galaxies produce less heavy elements that are also more efficiently ejected due to their shallow potential wells; as a result, for a given M_*, the gas metallicity decreases with SFR. For such galaxies, the outflow efficiency determines both the slope, and the knee of the metallicity-SFR relation. Without changing any parameters, this simple model is also successfully matched to the gas fraction - gas metallicity relation observed for a sample of about 260 nearby galaxies.
description: Accepted for publication in MNRAS
Pulsed power operation of commercially available silicon carbide mesfets
Creators: name: Walden, Mark G.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2001
Subjects: ING-INF/01 Elettronica

description: Sample devices of commercially available SiC MESFETs were measured under pulsed conditions. The results show significant improvements over traditional III-V devices measured under the same conditions. The measurements indicate that SiC devices may have several advantages for use in pulsed applications such as Phased Array Radar.
Additional file 1: of A positive feedback between IDO1 metabolite and COL12A1 via MAPK pathway to promote gastric cancer metastasis
Creators: name: Xiang, Zhen
name: Li, Jun
name: Song, Shuzheng
name: Wang, Jiexuan
name: Cai, Wei
name: Hu, Wenjun
name: Ji, Jun
name: Zhu, Zhenggang
name: Zang, Lu
name: Yan, Ranlin
name: Yu, Yingyan
Publisher: name: figshare
Year: 2019
Subjects: subject: Biochemistry
subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Molecular Biology
subject: Evolutionary Biology
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer
subject: Computational Biology

description: Table S1. SiRNA sequences used in this study. (DOCX 12 kb)
Rays and souls in von Mangoldt planes
Creators: name: Belegradek, Igor
name: Choi, Eric
name: Innami, Nobuhiro
Publisher: name: arXiv
Year: 2011
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: We study rays in von Mangoldt planes, which has applications to the structure of open complete manifolds with lower radial curvature bounds. We prove that the set of souls of any rotationally symmetric plane of nonnegative curvature is a closed ball, and if the plane is von Mangoldt, we compute the radius of the ball. We show that each cone in the Euclidean 3-space can be smoothed to a von Mangoldt plane.
description: 28 pages
Density-Dependent Response of an Ultracold Plasma to Few-Cycle Radio-Frequency Pulses
Creators: name: Wilson, Truman
name: Chen, Wei-Ting
name: Roberts, Jacob
Publisher: name: arXiv
Year: 2012
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Ultracold neutral plasmas exhibit a density-dependent resonant response to applied radio-frequency (RF) fields in the frequency range of several MHz to hundreds of MHz for achievable densities. We have conducted measurements where short bursts of RF were applied to these plasmas, with pulse durations as short as two cycles. We still observed a density-dependent resonant response to these short pulses. However, the too rapid timescale of the response, the dependence of the response on the sign of the driving field, the response as the number of pulses was increased, and the difference in plasma response to radial and axially applied RF fields are inconsistent with the plasma response being due to local resonant heating of electrons in the plasma. Instead, our results are consistent with rapid energy transfer from collective motion of the entire electron cloud to electrons in high-energy orbits. In addition to providing a potentially more robust way to measure ultracold neutral plasma densities, these measurements demonstrate the importance of collective motion in the energy transport in these systems.
description: 5 pages, 4 figures
Digital folklore : Marble Hornets, the Slender Man, and the emergence of folk horror in online communities
Creators: name: Keller, Dana
Publisher: name: University of British Columbia
Year: 2014

description: In June 2009 a group of forum-goers on the popular culture website, Something Awful, created a monster called the Slender Man. Inhumanly tall, pale, black-clad, and with the power to control minds, the Slender Man references many classic, canonical horror monsters while simultaneously expressing an acute anxiety about the contemporary digital context that birthed him. This anxiety is apparent in the collective legends that have risen around the Slender Man since 2009, but it figures particularly strongly in the Web series Marble Hornets (Troy Wagner and Joseph DeLage June 2009 - ). This thesis examines Marble Hornets as an example of an emerging trend in digital, online cinema that it defines as “folk horror”: a subgenre of horror that is produced by online communities of everyday people—or folk—as opposed to professional crews working within the film industry. Works of folk horror address the questions and anxieties of our current, digital age by reflecting the changing roles and behaviours of the everyday person, who is becoming increasingly involved with the products of popular culture. After providing a context for understanding folk horror, this thesis analyzes Marble Hornets through the lens of folkloric narrative structures such as legends and folktales, and vernacular modes of filmmaking such as cinéma direct and found footage horror. The focus then shifts to the ways in which Marble Hornets’ digital folk context amplifies the classic horror conventions with which the series engages. Primary attention is given to three key components: the monster, the narrative, and the audience. Folk horror might be a new term, but it is an old concept, one that reflects the important role that community plays in the forging of fear. It has been suggested that the Slender Man is a tulpa, a creature brought into physical existence by collective thought. As such he is truly a monster for the digital age as he reflects the many faces—positive and negative—of the increasingly “connected” individual. Through the lens of folk horror we may not only witness significant developments in the horror genre, but also those of storytelling on a broader scale.
Efficient CM-FEM modeling of coplanar waveguides for high-speed e/o modulators
Creators: name: Carbonera, F.
name: Bertazzi, F.
name: Goano, M.
name: Ghione, G.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2001
Subjects: ING-INF/01 Elettronica

description: A general approach is proposed for the accurate and efficient computation of the characteristic parameters of coplanar waveguides having electrodes of complex cross-section on multi-layered, planar or non-planar substrates, as presently considered for high-speed (semiconductor or LiNbO3) electrooptic modulators. The approach is based on the coupling of quasi-TEM finite element method with numerical conformal mapping, and provides the frequency-dependent parameters of an equivalent transmission line model. The present technique, implemented in MATLAB as a practical design tool, is compared with semi-analytical methods (when applicable) and full-wave finite element method: excellent agreement is demonstrated with the full-wave solution, at a fraction of its computational cost.
Additional file 1 of Prevalence and risk factors for antibiotic utilization in Chinese children
Creators: name: Guo, Shasha
name: Sun, Qiang
name: Zhao, Xinyang
name: Shen, Liyan
name: Zhen, Xuemei
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Science Policy
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Virology

description: Additional file 1:.
Multibrane Solutions in Open String Field Theory
Creators: name: Murata, Masaki
name: Schnabl, Martin
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study properties of a class of solutions of open string field theory which depend on a single holomorphic function F(z). We show that the energy of these solutions is well defined and is given by integer multiples of a single D-brane tension. Potential anomalies are discussed in detail. Some of them can be avoided by imposing suitable regularity conditions on F(z), while the anomaly in the equation of motion seems to require an introduction of the so called phantom term.
description: 31 pages; v2: references added, minor changes, version published in JHEP
Isolation, structure elucidation, and total synthesis of bioactive natural products
Creators: name: Forestieri, Roberto
Publisher: name: University of British Columbia
Year: 2015

description: Marine organisms are a potential source of lead compounds for drug discovery. Complex and unique chemical structures isolated from marine invertebrates and their associated microorganisms can interact with specific cellular targets and selectively modulate biological pathways that play an important role in the pathogenesis of various diseases such as diabetes and tuberculosis (TB). The isolation, structure elucidation, and total synthesis of bioactive marine natural products are described herein. Alotaketals A (2.1), B (2.3), D (2.4), and E (2.5) are a new class of sesterterpenoids isolated from the marine sponge Hamigera sp. that activate the cAMP cell signaling pathway. Here, the chemical structures of alotaketals and their unprecedented "alotane" skeleton are described. The ability of alotaketal A (2.1) to activate cAMP signaling (EC50 = 18 nM) can be attributed to direct activation of adenylyl cylcase. Alotaketal A (2.1) is a chemical tool that can be useful for the study of cAMP signaling function in diabetes and other diseases. Clionamines A (5.1), B (5.2), C (5.3), and D (5.4) are a new class of aminosteroids isolated from the marine sponge Cliona celata that strongly stimulate autophagy in MCF-7 human breast cancer cells. Clionamine A (5.1) was tested for its ability to clear Mycobacterium tuberculosis (Mtb) from infected THP-1 cells and it gave a clear dose response with complete clearance at 5 μM and an IC50 of ≈ 3 μM. The anti-TB activity of clionamines confirms the role of autophagy in the response of human macrophages against Mtb infection. Clionamine B (5.2) was synthesized starting from the steroidal sapogenin tigogenin (5.30) in 12 steps with ≈ 2% overall yield. Synthetic clionamine B (5.2) strongly stimulates autophagy at 30 μg/mL and inhibits Mtb proliferation in humane macrophages via autophagy activation. The clionamine pharmacophore was identified by structure-activity analysis of unnatural clionamines analogues that were synthesized starting from the steroidal sapogenin sarsasapogenin (5.5). Among these synthetic analogues, N-benzyl-3,5-epi-clionamine B (5.24) was found to be a potent inhibitor (MIC = 5 μg/mL) of Mtb proliferation in THP-1 human monocytic cells, indentifying N-benzyl-aminosteroids as a new class of potent antimicrobial compounds that are able to kill Mtb.
High tuning speed optical receiver front-end for packet-switched WDM Networks
Creators: name: Manfrin, S.K.
name: Orengo, G.
name: Giannini, F.
name: Romero, M. A.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2001
Subjects: ING-INF/01 Elettronica

description: In this work two distinct optical receiver conjurations are investigated for use in the downstream direction of ATM PON networks based on wavelength division multiplexing (WDM). The goal is to overcome the slow tuning speed of optical filters, achieving channel selection in the nanosecond time frame and allowing the implementation of an efficient ATM/WDM protocol.
40 Gbit/s GaAs MMIC Signal Processor for Optical Communication Systems
Creators: name: Monteiro, Paulo P.
name: Violas, Manuel
name: Sousa Ribeiro, Rui
name: Ferreira Da Rocha, José
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2001
Subjects: ING-INF/01 Elettronica

description: We will present the design and characterisation of a transversal microwave filter as a signal processor for 40 Gbit/s optical receivers. The work reports, for the first time, a versatile transversal filter, implemented as a monolithic microwave integrated circuit (MMIC) with capacity to adjust the frequency response for signal processing at these very high bit rates. The main features are the electrical response tuning facility and signal gain.
There is no [21, 5, 14] code over F5
Creators: name: Araya, Makoto
name: Harada, Masaaki
Publisher: name: arXiv
Year: 2012
Subjects: subject: Combinatorics (math.CO)
subject: Information Theory (cs.IT)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: In this note, we demonstrate that there is no [21, 5, 14] code over F5.
description: 5 pages
On a problem of Sierpinski
Creators: name: Fang, Jin-Hui
name: Chen, Yong-Gao
Publisher: name: arXiv
Year: 2011
Subjects: subject: Number Theory (math.NT)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 11A41, 11A67

description: Let $s\ge 2$ be an integer. Denote by $μ_s$ the least integer so that every integer $\ell >μ_s$ is the sum of exactly $s$ integers $>1 $ which are pairwise relatively prime. In 1964, Sierpiński asked a determination of $μ_s$. Let $p_1=2$, $p_2=3, ...$ be the sequence of consecutive primes and let $μ_s = p_2+p_3+...+p_{s+1}+c_s$. P. Erd\H os proved that there exists an absolute constant $C$ with $-2\le c_s\le C$. In this paper, we determine $μ_s$ for all $s\ge 2$. As a corollary, we show that $-2\le c_s\le 1100$ and the set of integers $s$ with $μ_s= p_2+p_3+... +p_{s+1}+1100$ has the asymptotic density 1.
description: 15pages
Vertical Cavity Surface Emitting Laser for Operation at 1.5 µm with Integral AlGaInAs/InP Bragg mirrors
Creators: name: Linnik, M.
name: Christou, A.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2001
Subjects: ING-INF/01 Elettronica

description: The design and performance of a low threshold selectively oxidized Vertical Cavity Surface Emitting Laser (VCSEL) fabricated for operation at a wavelength of 1.55 µm is based on III-V quaternary semiconductor alloys and is grown by Molecular Beam Epitaxy technique. The theoretical investigation of the optical properties of the compound semiconductor alloys allows one to select the optimum materials for highly reflective Bragg mirrors. The simulation of the designed VCSEL performance has been carried out by evaluation of the important laser characteristics such as threshold gain, threshold current density and external quantum efficiency.
title: Liste de mots en arem lue par un locuteur né à Thượng Trạch en 1959
title: List of Arem words read by a speaker born in Thượng Trạch in 1959
Creators: name: Tạ Thành Tấn
Publisher: name: Pangloss
Year: 2021
Subjects: subject: Linguistique
subject: Arem

description: Frame sentences containing target words with onset dentals and velars and some other onsets. Social Sciences and Humanities Research Council of Canada 435-2017-0498: Voicing and its transphonologization: the initiation and actuation of a sound change in Southeast Asia
Photon-assisted entanglement creation by minimum-error generalized quantum measurements in the strong coupling regime
Creators: name: Bernád, J. Z.
name: Alber, G.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We explore possibilities of entangling two distant material qubits with the help of an optical radiation field in the regime of strong quantum electrodynamical coupling with almost resonant interaction. For this purpose the optimum generalized field measurements are determined which are capable of preparing a two-qubit Bell state by postselection with minimum error. It is demonstrated that in the strong-coupling regime some of the recently found limitations of the non-resonant weak-coupling regime can be circumvented successfully due to characteristic quantum electrodynamical quantum interference effects. In particular, in the absence of photon loss it is possible to postselect two-qubit Bell states with fidelities close to unity by a proper choice of the relevant interaction time. Even in the presence of photon loss this strong-coupling regime offers interesting perspectives for creating spatially well-separated Bell pairs with high fidelities, high success probabilities, and high repetition rates which are relevant for future realizations of quantum repeaters.
description: 14 pages, 12 figures
NMOS SPDT Switch MMIC with >44 dB Isolation and 30 dBm IIP3 for Applications within GSM and UMTS bands
Creators: name: Gould, P.
name: Lin, J.
name: Boric-Lubecke, O.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2001
Subjects: ING-INF/01 Elettronica

description: This paper describes the first reported, fully integrated, 0.25摯瑬敳獩m NMOS SPDT switch MMIC, for GSM and UMTS applications, fabricated on 10 Ωcm silicon substrate. This switch has the highest reported isolation, >44 dB below 2.2GHz, for a NMOS switch and high IIP3 (30 dBm at 900 MHz) for a 3V control voltage. Good RF port matches and <2.3 dB insertion loss are demonstrated over the whole frequency band.
„ Phyto“-Ceramide aus pflanzlichen Ressourcen zur Nutzung in der Dermatotherapie
Creators: name: Reisberg, Mathias
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2017
Subjects: subject: 615

description: Ceramide (Cer) stellen ca. 50 % der Lipide des Stratum corneums dar. Die Gehalte der Haut-Cer sind bei Hauterkrankungen wie Psoriasis oder Neurodermitis verringert, ihre Zusammensetzung ist verändert. Glycosylceramide (GlyCer) kommen ubiquitär in Pflanzen vor. Für ein Screening unterschiedlicher Pflanzenmaterialien wurde eine AMD-HPTLC-Methode zur Quantifizierung von GlyCer entwickelt. Methoden zur Extraktion, Isolierung (SC, präp. HPLC-MS) und Strukturaufklärung (TLC, HPLC-MS, MS/MS, HRMS, NMR) sind etabliert worden. GlyCer wurden aus Apfeltrester, Weizenkeimen und Kaffeesatz mit 28,9 mg, 33,7 mg und 4,4 mg je 100 g Trockengewicht gewonnen. In sechs Fabaceae-Arten wurden GlyCer-Gehalte von 9,4 bis 23,1 mg je 100 g Trockengewicht nachgewiesen. 46 GlyCer wurden identifiziert, darunter neuartige GlyCer (Malusid I-III) mit zusätzlichen Hydroxy- und Ketogruppen. GlyCer wurden mithilfe einer rekombinanten humanen Glucocerebrosidase (Imiglucerase) zu „Phyto“-Cer hydrolysiert.
description: Ceramides (Cer) play a crucial role in the skin barrier function by providing a major lipid class (approx. 50 %) in the outermost layer of the skin – the stratum corneum. Levels and composition of skin Cer are altered in skin diseases such as psoriasis and atopic dermatitis. Glycosylceramides (GlyCer) occur ubiquitously in plants. An AMD-HPTLC method for plant screening and GlyCer quantification was developed. Extraction, isolation (CC, prep. HPLC-MS) and structure elucidation (TLC, HPLC-MS, MS/MS, HRMS, NMR) methods were established. GlyCer were isolated from apple pomace, wheat germs and coffee grounds with 28.9 mg, 33.7 mg and 4.4 mg per 100 g dry weight. GlyCer were detected in six Fabaceae species with contents between 9.4 and 23.1 mg per 100 g dry weight. 46 GlyCer were identified, with novel GlyCer (Maluside I-III) with additional hydroxyl and oxo groups. GlyCer were hydrolysed by a recombinant human glucocerebrosidase (imiglucerase) to yield “phyto”-Cer.
A fully integrated silicon-germanium X-Band VCO
Creators: name: Masini, Leonardo
name: Pozzoni, Massimo
name: Caliumi, Alberto
name: Tomasini, Luciano
name: Morigi, Damiana
name: Lemaire, Frederic
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2001
Subjects: ING-INF/01 Elettronica

description: The design and realisation of a fully integrated Silicon Germanium (SiGe) X-Band Voltage Controlled Oscillator (VCO) is presented. It performs low phase noise and 10% tuning bandwidth at low voltage bias supply. The VCO, comprising integrated inductors and output transformers, is implemented in a SiGe technology which is suitable for high volume production. The features of this VCO, the adopted methodology and the herein proven potential of the technology make this work a good starting point for the design of next generation totally integrated fast PLL’s. The paper will describe also the architectures chosen and the design techniques adopted.
Additional file 25 of Highly recurrent CBS epimutations in gastric cancer CpG island methylator phenotypes and inflammation
Creators: name: Padmanabhan, Nisha
name: Kyon, Huang Kie
name: Boot, Arnoud
name: Lim, Kevin
name: Srivastava, Supriya
name: Chen, Shuwen
name: Wu, Zhiyuan
name: Lee, Hyung-O K
name: Mukundan, Vineeth T.
name: Chan, Charlene
name: Chan, Yarn Kit
name: Xuewen, Ong
name: Pitt, Jason J.
name: Isa, Zul Fazreen Adam
name: Xing, Manjie
name: Lee, Ming Hui
name: Tan, Angie Lay Keng
name: Ting, Shamaine Ho Wei
name: Luftig, Micah A.
name: Kappei, Dennis
name: Kruger, Warren D.
name: Bian, Jinsong
name: Ho, Ying Swan
name: Teh, Ming
name: Rozen, Steve George
name: Tan, Patrick
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 25. Review history.
Persistent massive attractors of smooth maps
Creators: name: Volk, Denis
Publisher: name: arXiv
Year: 2011
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37C05, 37C20, 37C70, 37D20, 37D45

description: For a smooth manifold of any dimension greater than one, we present an open set of smooth endomorphisms such that any of them has a transitive attractor with a non-empty interior. These maps are $m$-fold non-branched coverings, $m \ge 3$. The construction applies to any manifold of the form $S^1 \times M$, where $S^1$ is the standard circle and $M$ is an arbitrary manifold.
description: 13 pages. Added more references, updated existing ones
Economia e filosofia
Creators: name: Zamagni, Stefano
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1994
Subjects: SECS-P/01 Economia politica

description: The present essay addresses the question of whether or not economics can usefully progress without establishing a special link with philosophy. It aims to provide an overview for a broad audience of working economists and to suggest possibilities for research to those with specific interests in the foundations of economic discourse. After the introductory and motivational remarks of sections 1 and 2, section 3 deals with the crisis of the neopositivist research programme and its impact on economic epistemology. Section 4 presents the main reasons accounting for the recent revival of the political dimension in economic research. Section 5 is concerned with the moral relevance and presuppositions of economic processes and outcomes and addresses the problems faced in making value assertions a part of the critical discourse of economics. Few general considerations conclude the paper.
Vergleich der niedermolekularen Heparine Enoxaparin, Certoparin und Dalteparin zur Verhinderung von Herzkatheter-Thrombosen in einem in vitro-Modell
Creators: name: Bußhardt, Marese
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2012
Subjects: subject: Online-Publikation
subject: Hochschulschrift
subject: 615
subject: 610

description: Eine zwar seltene aber potentiell verheerende Komplikation einer perkutanen Koronarintervention ist die Entstehung einer Herzkatheter-Thrombose. Unfraktioniertes Heparin und das niedermolekulare Heparin Enoxaparin sind die zur periinterventionellen Thromboseprophylaxe verwendeten Standard-Antikoagulantien. In dieser Promotionsarbeit wurde die Wirksamkeit der niedermolekularen Heparine Certoparin und Dalteparin in der Verhinderung von Herzkatheter-assoziierten Thrombosen in einem in vitro-Modell mit derjenigen von Enoxaparin verglichen. Die entstandenen Herzkatheter-Thromben wurden durch die Messung von Durchlaufzeit und Thrombusgewicht sowie durch den elektronenmikroskopischen Nachweis von Erythrozyten, Thrombozyten und Fibrin an der inneren Katheter-Oberfläche quantifiziert. In allen Versuchsgruppen ergaben sich hinsichtlich der vordefinierten Endpunkte keine signifikanten Unterschiede. Die Kombination mit Eptifibatid brachte in unserem Modell keinen Vorteil. Damit scheinen Certoparin und Dalteparin in der Verhinderung von Herzkatheter-Thrombosen ebenso geeignet zu sein wie Enoxaparin.
description: Anticoagulation is essential for the prevention of cardiac catheter thrombus formation during percutaneous coronary interventions (PCI). Unfractionated heparin (UFH) or the low-molecular-weight-heparin (LMWH) enoxaparin are used as standard anticoagulation treatments in the setting of PCI. The aim of the present study was to compare the efficacy of LMWHs certoparin and dalteparin to that of enoxaparin in preventing cardiac catheter thrombosis in an in vitro-model. Blood pretreated with the anticoagulants of interest was continuously circulated through a guiding catheter using a roller pump for a maximum period of 60 minutes. Time to catheter occlusion, total thrombus weight and thrombus electron-microscopic parameters were used as endpoints to quantify thrombus generation. Our results indicate that certoparin and dalteparin are as effective as enoxaparin in preventing cardiac catheter thrombus formation in vitro. We also found that combining each LMWH with eptifibatide did not produce additional antithrombotic effects.
A geometric analysis of subspace clustering with outliers
Creators: name: Soltanolkotabi, Mahdi
name: Candés, Emmanuel J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Information Theory (cs.IT)
subject: Machine Learning (cs.LG)
subject: Statistics Theory (math.ST)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: This paper considers the problem of clustering a collection of unlabeled data points assumed to lie near a union of lower-dimensional planes. As is common in computer vision or unsupervised learning applications, we do not know in advance how many subspaces there are nor do we have any information about their dimensions. We develop a novel geometric analysis of an algorithm named sparse subspace clustering (SSC) [In IEEE Conference on Computer Vision and Pattern Recognition, 2009. CVPR 2009 (2009) 2790-2797. IEEE], which significantly broadens the range of problems where it is provably effective. For instance, we show that SSC can recover multiple subspaces, each of dimension comparable to the ambient dimension. We also prove that SSC can correctly cluster data points even when the subspaces of interest intersect. Further, we develop an extension of SSC that succeeds when the data set is corrupted with possibly overwhelmingly many outliers. Underlying our analysis are clear geometric insights, which may bear on other sparse recovery problems. A numerical study complements our theoretical analysis and demonstrates the effectiveness of these methods.
description: Published in at http://dx.doi.org/10.1214/12-AOS1034 the Annals of Statistics (http://www.imstat.org/aos/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Helimagnons in a chiral ground state of the pyrochlore antiferromagnets
Creators: name: Choi, Eunsong
name: Chern, Gia-Wei
name: Perkins, Natalia B.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The Goldstone mode in a helical magnetic phase, also known as the helimagnon, is a propagating mode with a highly anisotropic dispersion relation. Here we study theoretically the helimagnon excitations in a complex chiral ground state of pyrochlore antiferromagnets such as spinel CdCr2O4 and itinerant magnet YMn2. We show that the effective theory of the soft modes in the helical state possesses a symmetry similar to that of smectic liquid crystals. We compute the low-energy spin-wave spectrum based on a microscopic spin Hamiltonian and find a dispersion relation characteristic of the helimagnons. By performing dynamics simulations with realistic model parameters, we also obtain an overall agreement between experiment and the numerical spin-wave spectrum. Our work thus also clarifies the mechanisms that relive the magnetic frustration in these compounds.
description: 5 pages, 3 figures
A Note on Multiplicative Uncertainty and Partisan Policies
Creators: name: Castellani, Massimiliano
name: Scorcu, Antonello E.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2004
Subjects: SECS-P/02 Politica economica

description: In this paper we consider the effects of «multiplicative» uncertainty about the structure of the economy in the standard partisan model. An increase in the uncertainty decreases of the inflation rate pursued by the liberal policymaker, but increases the inflation rate pursued by the conservative policymaker. For certain configurations of the parameters, an increase in the uncertainty reduces the expected loss of both parties.
Moiré patterns on STM images of graphite from surface and subsurface rotated layer
Creators: name: Flores, M.
name: Cisternas, E.
name: Correa, J. D.
name: Vargas, P.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We have observed with STM moiré patterns corresponding to the rotation of one graphene layer on HOPG surface. The moiré patterns were characterized by rotation angle and extension in the plane. Additionally, by identifying border domains and defects we can discriminate between moiré patterns due to rotation on the surface or subsurface layer. For a better understanding of moiré patterns formation we have studied by first principles an array of three graphene layers where the top or the middle layer appears rotated around the stacking axis. We compare the experimental and theoretical results and we show the strong influence of rotations both in surface and subsurface layers for moiré patterns formation in corresponding STM images.
description: 5 pages, 6 figures
A cortical based model of perceptual completion in the roto-translation space
Creators: name: Citti, G.
name: Sarti, A.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2004
Subjects: ING-INF/06 Bioingegneria elettronica e informatica
MAT/05 Analisi matematica

description: We present a mathematical model of perceptual completion and formation
of subjective surfaces, which is at the same time inspired by the architecture
of the visual cortex, and is the lifting in the 3-dimensional rototranslation group of
the phenomenological variational models based on elastica functional. The initial
image is lifted by the simple cells to a surface in the rototraslation group and the
completion process is modelled via a diffusion driven motion by curvature. The
convergence of the motion to a minimal surface is proved. Results are presented
both for modal and amodal completion in classic Kanizsa images.
Discourse analysis of asynchronous conversations
Creators: name: Joty, Shafiq Rayhan
Publisher: name: University of British Columbia
Year: 2014

description: A well-written text is not merely a sequence of independent and isolated sentences, but instead a sequence of structured and related sentences. It addresses a particular topic, often covering multiple subtopics, and is organized in a coherent way that enables the reader to process the information. Discourse analysis seeks to uncover such underlying structures, which can support many applications including text summarization and information extraction. This thesis focuses on building novel computational models of different discourse analysis tasks in asynchronous conversations; i.e., conversations where participants communicate with each other at different times (e.g., emails, blogs). Effective processing of these conversations can be of great strategic value for both organizations and individuals. We propose novel computational models for topic segmentation and labeling, rhetorical parsing and dialog act recognition in asynchronous conversation. Our approaches rely on two related computational methodologies: graph theory and probabilistic graphical models. The topic segmentation and labeling models find the high-level discourse structure; i.e., the global topical structure of an asynchronous conversation. Our graph-based approach extends state-of-the-art methods by integrating a fine-grained conversational structure with other conversational features. On the other hand, the rhetorical parser captures the coherence structure, a finer discourse structure, by identifying coherence relations between the discourse units within each comment of the conversation. Our parser applies an optimal parsing algorithm to probabilities inferred from a discriminative graphical model which allows us to represent the structure and the label of a discourse tree constituent jointly, and to capture the sequential and hierarchical dependencies between the constituents. Finally, the dialog act model allows us to uncover the underlying dialog structure of the conversation. We present unsupervised probabilistic graphical models that capture the sequential dependencies between the acts, and show how these models can be trained more effectively based on the fine-grained conversational structure. Together, these structures provide a deep understanding of an asynchronous conversation that can be exploited in the above-mentioned applications. For each discourse processing task, we evaluate our approach on different datasets, and show that our models consistently outperform the state-of-the-art by a wide margin. Often our results are highly correlated with human annotations.
Additional file 1 of MASS: predict the global qualities of individual protein models using random forests and novel statistical potentials
Creators: name: Liu, Tong
name: Wang, Zheng
Publisher: name: figshare
Year: 2020
Subjects: subject: Biophysics
subject: Biochemistry
subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Biological Sciences not elsewhere classified
subject: Information Systems not elsewhere classified
subject: Mathematical Sciences not elsewhere classified

description: Additional file 1. Supplementary Information and data. This document provides more details regarding pseudo amino acid composition, MASS potential comparision, and evaluation results for different QA methods in stage 1.
Delayed formation of coherent LO phonon-plasmon coupled modes in n-type and p-type GaAs measured using a femtosecond coherent control technique
Creators: name: Hu, Jianbo
name: Misochko, Oleg V.
name: Goto, Arihiro
name: Nakamura, Kazutaka G.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Coherent control experiments using a pair of collinear femtosecond laser pulses have been carried out to manipulate longitudinal optical (LO) phonon-plasmon coupled (LOPC) modes in both p- and n-type GaAs. By tuning the interpulse separation, remarkably distinct responses have been observed in the two samples. To understand the results obtained a phenomenological model taking the delayed formation of coherent LOPC modes into account is proposed. The model suggests that the lifetime of coherent LOPC modes plays a key role and the interference of the coherent LO phonons excited successively by two pump pulses strongly affects the manipulation of coherent LOPC modes.
description: 19 pages, 6 figures, accepted for publication in Phys. Rev. B
A generalized conversion matrix between non-uniform B-spline and Bezier representations with applications in CAGD
Creators: name: Casciola, G.
name: Romani, L.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2004
Subjects: MAT/08 Analisi numerica
MAT/03 Geometria
INF/01 Informatica

description: This paper presents the recursive computations of the generalized conversion matrices which allow direct transformations between non-uniform B-spline and Bezier representations of arbitrary degrees, defined over a completely arbitrary interval of the real axis. Although the very general setting assumed, the prposed algorithm turns out to be very easy and practical, and provides interesting applications in computer aided geometric design.
Rastertunnelmikroskopie zum Wachstum und zur Struktur dünner CU-Schichten auf RU(0001) im Temperaturbereich von 100 K bis Raumtemperatur
Creators: name: Mitte, Matthias
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2001
Subjects: Hochschulschrift
Elektronische Publikation
Zsfassung in engl. Sprache

description: Das epitaktische Wachstum dünner Schichten spielt, bedingt durch die speziellen Eigenschaften dieser Schichten, in der Industrie seit langem eine wichtige Rolle. So werden bei der Herstellung von magnetische Speichermedien höchster Speicherdichte zunehmend dünne epitaktisch gewachsene Metallfilme auf Ruthenium verwendet. Wesentlicher Inhalt der Arbeit war es, das Wachstumsverhalten von Kupferschichten auf der Ru(0001)-Oberfläche bei Temperaturen im Bereich von 100 K bis Raumtemperatur zu untersuchen. Daneben werden strukturelle Eigenschaften der gewachsenen Kupferfilme angegeben. Im gesamten Temperaturbereich wurde dreidimensionales Multilagenwachstum gefunden. Die Untersuchungen zeigten, daß bei Temperaturen unterhalb von 160 K das Wachstumsverhalten und die strukturellen Eigenschaften der Inseln starke Veränderungen aufweisen. Diese Beobachtungen werden im Zusammenhang mit Keimbildungstheorien diskutiert. Durch eine chemische Modifizierung der Ruthenium-Oberfläche durch Sauerstoff wird ein deutlicher Einfluß auf das Wachstumsverhalten erwartet. Ein weiteres Ziel dieser Arbeit war es, diese Modifizierung beim Wachstum von Kupferfilmen auf der mit der O(2x2)- und O(2x1)-Struktur präparierten Ru(0001)-Oberfläche darzustellen. Hier wurden deutliche Unterschiede im Vergleich zur sauerstofffreien Ru(0001)-Oberfläche gefunden. Die Wechselwirkungen des Sauerstoffs mit den wachsenden Filmstrukturen wurden in Abhängigkeit von der Sauerstoffbedeckung und der Temperatur gezeigt.
description: Since a long time, the epitactical growth of thin films plays an important role in the industry caused by the special properties of such films. So, by the production of magnetic storing devices with highest storage density more and more thin metal films growed on ruthenium are used. The main intention of this work was to study the growth of copper films on the Ru(0001) surface in the range of temperature between 100 K and room temperature. Also informations about the structural properties are given. Across the temperature range a multilayer growth are found. The investigations showed that on temperatures lower than 160 K the growth and the structure of the islands have strong changes. The results are discussed in the context of nucleation theories. It is expected that a chemical modification of the ruthenium surface will have a clear influence on the growth behaviour. A further objective of this work was to present these modifications of growth of copper films on the O(2x2) and O(2x1) covered Ru(0001) surface. A lot of differences in comparison with the clean Ru(0001)surface are found. The interaction of oxygen with the growing island are showed depending on the temperature and the covering of the surface with oxygen.
Harnack inequalities and Gaussian estimates for a class of hypoelliptic operators
Creators: name: Pascucci, Andrea
name: Polidoro, Sergio
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2004
Subjects: MAT/05 Analisi matematica

description: We prove a global Harnack inequality for a class of degenerate evolution operators by using repeatedly an invariant local Harnack inequality. As a consequence we obtain an accurate Gaussian lower bound for the fundamental solution for some meaningful families of degenerate operators.
Frustrated quantum Ising spins simulated by spinless bosons in a tilted lattice: from a quantum liquid to antiferromagnetic order
Creators: name: Pielawa, Susanne
name: Berg, Erez
name: Sachdev, Subir
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We study spinless bosons in a decorated square lattice with a near-diagonal tilt. The resonant subspace of the tilted Mott insulator is described by an effective Hamiltonian of frustrated quantum Ising spins on a non-bipartite lattice. This generalizes an earlier proposal for the unfrustrated quantum Ising model in one dimension which was realized in a recent experiment on ultracold $^{87}$Rb atoms in an optical lattice. Very close to diagonal tilt, we find a quantum liquid state which is continuously connected to the paramagnet. Frustration can be reduced by increasing the tilt angle away from the diagonal, and the system undergoes a transition to an antiferromagnetically ordered state. Using quantum Monte Carlo simulations and exact diagonalization, we find that for realistic system sizes the antiferromagnetic order appears to be quasi-one-dimensional; however, in the thermodynamic limit the order is two-dimensional.
description: 27 pages, 14 figures
Data-driven analysis of the simulations of the spread of COVID-19 under different interventions of China
Creators: name: Tian, Ting
name: Zhang, Jingwen
name: Lin, Shiyun
name: Jiang, Yukang
name: Tan, Jianbin
name: Li, Zhongfei
name: Wang, Xueqin
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Medicine
subject: Neuroscience
subject: Biotechnology
subject: Biological Sciences not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Cancer
subject: Infectious Diseases
subject: FOS: Health sciences

description: Since February 2020, COVID-19 has spread rapidly to more than 200 countries in the world. During the pandemic, local governments in China have implemented different interventions to efficiently control the spread of the epidemic. Characterizing transmission of COVID-19 under some typical interventions is essential to help countries develop appropriate interventions. Based on the pre-symptomatic transmission patterns of COVID-19, we established a novel compartmental model: Susceptible-Infectious-Confirmed-Removed (SICR) model, which allowed the effective reproduction number to change over time, thus the effects of policies could be reasonably estimated. Using the epidemic data of Wuhan, Wenzhou, and Shenzhen, we migrated the corresponding estimated policy modes to South Korea, Italy, and the United States and simulated the potential outcomes for these countries when they adopted similar policy strategies to China. We found that the mild interventions implemented in Shenzhen were effective in controlling the epidemic in the early stage, while more stringent policies which were implemented in Wuhan and Wenzhou were necessary if the epidemic became severe and needed to be controlled in a short time.
On a class of degenerate parabolic equations of Kolmogorov type
Creators: name: Di Francesco, Marco
name: Pascucci, Andrea
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2004
Subjects: MAT/05 Analisi matematica

description: We adapt the Levi's parametrix method to prove existence, estimates and qualitative properties of a global fundamental solution to ultraparabolic partial differential equations of Kolmogorov type. Existence and uniqueness results for the Cauchy problem are also proved.
Analysis of an uncertain volatility model
Creators: name: Di Francesco, Marco
name: Foschi, P.
name: Pascucci, Andrea
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2004
Subjects: MAT/05 Analisi matematica

description: We examine, both from an analytical and numerical viewpoint, the uncertain volatility model by Hobson-Rogers in the framework of degenerate parabolic PDEs of Kolmogorov type.
Complementarity between product and process
innovation in a monopoly setting
Creators: name: Mantovani, Andrea
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2005
Subjects: SECS-P/07 Economia aziendale

description: We study complementarity between product and process innovation in a monopoly setting.
First we consider the possibility for the firm to alternatively invest only along one of the
two directions and compare the incentives of process vs product innovation. Then we allow
the firm to invest simultaneously in both activities, showing that both investment levels
as well as the profit are higher than in case of individual investment. Product and process
innovations are then complementary and the firm always prefers a simultaneous adoption.