cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Frame-dragging, disk warping, jet precessing, and dipped X-ray lightcurve of Sw J1644+57
Creators: name: Lei, Wei-Hua
name: Zhang, Bing
name: Gao, He
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The X-ray transient source Sw J1644+57 recently discovered by Swift is believed to be triggered by tidal disruption of a star by a rapidly spinning supermassive black hole (SMBH). For such events, the outer disk is very likely misaligned with respect to the equatorial plane of the spinning SMBH, since the incoming star before disruption most likely has an inclined orbital plane. The tilted disk is subject to the Lense-Thirring torque, which tends to twist and warp due to the Bardeen-Petterson effect. The inner disk tends to align with the SMBH spin, while the outer region tends to remain in the stellar orbital plane, with a transition zone around the Bardeen-Petterson radius. The relativistic jet launched from the spinning SMBH would undergo precession. The 5-30 day X-ray lightcurve of Sw J1644+57 shows a quasi-periodic (2.7-day) variation with noticeable narrow dips. We numerically solve a warped disk and propose a jet-precessing model by invoking a Blandford-Znajek jet collimated by a wind launched near the Bardeen-Petterson radius. Through simulations, we show that the narrow dips in the X-ray lightcurve can be reproduced for a range of geometric configurations. From data we infer that the inclination angle of the initial stellar orbit is in the range of $10^{\circ}-20^{\circ}$ from the SMBH equatorial plane, that the jet should have a moderately high Lorentz factor, and that the inclination angle, jet opening angle, and observer's viewing angle are such that the duty cycle of the line-of-sight sweeping the jet cone is somewhat less than 0.5.
description: 8 pages, 8 figures; Accepted for publication in ApJ
Ka-band Coplanar Low-Noise Amplifier Design with Power PHEMTs
Creators: name: Long, Sabine
name: Escotte, L.
name: Graffeuil, Jacques
name: Fellon, P.
name: Roques, Daniel
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: ING-INF/01 Elettronica

description: The design of a coplanar low-noise amplifier (LNA)is presented in this paper.Pseudomorphic high electron mobility transistors (PHEMTs),optimized for power applications,are used in order to evaluate the potentiality of this technology for mixed-mode applications. The three stages amplifier noise figure is lower than 2.6 dB on the 27 -31 GHz frequency band with a 20 dB power gain.
An electrically charged doubly spinning dipole black ring
Creators: name: Rocha, Jorge V.
name: Rodriguez, Maria J.
name: Varela, Oscar
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We present a new asymptotically flat, doubly spinning black ring of D = 5 Einstein-Maxwell-dilaton theory with Kaluza-Klein dilaton coupling. Besides the mass and two angular momenta, the solution displays both electric charge and (magnetic) dipole charge. The class of solutions that are free from conical singularities is described by four parameters. We first derive the solution in six dimensions employing the inverse scattering method, thereby generalising the inverse-scattering construction by two of the current authors of Emparan's singly spinning dipole black ring. The novel black ring itself arises upon circle Kaluza-Klein reduction. We also compute the main physical properties and asymptotic charges of our new class of solutions. Finally, we present a five-parameter generalisation of our solution.
description: v2: Improved presentation with new additions including plots of some physical charges and a new appendix with the most general five-parameter solution. Version to be published in JHEP
High-Performance Integrated RF-MEMS: Part 1-The Process
Creators: name: Morris, Arthur S.
name: Cunningham, Shawn
name: Dereus, Dana
name: Schröpfer, Gerold
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: ING-INF/01 Elettronica

description: RF MEMS have been pursued for more than a decade as a solution to high-performance on-chip fixed, tunable and switchable passives.However,the implementation of RF-MEMS into products has remained elusive.This is partly due to special-purpose processes that only supported a narrow application field,in many cases optimized for single devices.This prevented aggregation of volumes to justify the manufacturing infrastructure of even a single production foundry.This paper presents a single process that has been implemented in multiple foundries and highlights a wide range of high-performance devices including switches,inductors,varactors,and phase-shifters that have been or are being built using this process.This process thus forms the foundation for a wide range of reconfigurable and tunable RF passive circuits.
Finite Ground Coplanar Lines on CMOS Grade Silicon with a Thick Embedded Silicon Oxide Layer Using Micromachining Techniques
Creators: name: Wang, Guoan
name: Bacon, Andrew
name: Abdolvand, Reza
name: Ayazi, Farrokh
name: Papapolymerou, John
name: Tentzeris, Emmanouil M.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: ING-INF/01 Elettronica

description: Finite Ground Coplanar (FGC)waveguide transmission lines on CMOS grade silicon wafer (U<0.01 ohm-cm)with a thick embedded silicon oxide layer have been developed using micromachining techniques.Lines with different lengths were designed,fabricated and measured.Measured attenuation and s-parameters are presented in the paper.Results show that the attenuation loss of the fabricated FGC lines is as low as 3.2 dB/cm at 40 GHz.
Fossocarus Howden 1961
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Fossocarus

description: Fossocarus Howden, 1961
[1 species].
Type species Fossocarus creoleorum Howden, 1961, by original designation.
description: Published as part of Allsopp, Peter G. & Schoolmeesters, Paul, 2024, All genera of the world: Subfamilies Prototroginae, Cretoscarabaeinae, Dynamopodinae, Electrorubesopsinae, Phaenomeridinae, Orphninae, Allidiostomatinae, Aclopinae, Lichniinae, Melolonthinae, Oncerinae, Podolasiinae, Sericinae, Sericoidinae (Animalia: Arthropoda: Insecta: Coleoptera: Scarabaeidae), pp. 104-175 in Megataxa 12 (1) on page 129, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
Is the Lorentz limiting speed equal to the Speed of Light? Photons vs Neutrino tests
Creators: name: Frere, Jean-Marie
name: Mollet, Simon
name: Tytgat, Michel H. G.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: We discuss the possibility that the limiting speed (c_l) appearing in Lorentz equations might be different i.e., slightly larger than the observed speed of light (c_n). We show that such a possibility can be tested by state-of-the-art Michelson-Morley experiments, but also by careful measurement of neutrino speeds. It would indeed suffice to show that c_n < c_neutrinos <= c_l. Quite interestingly, current limits from both approaches are competitive, in some circumstances. We also comment on competing tests using gamma-ray burst, assuming a dispersive character for the propagation of light.
description: 8 pages, 1 figure. Updated was latest ICARUS results; matches version to be published in EPJC
Effects of a loop array layer on a micro-inductor for future RF MEMS Components
Creators: name: Tassetti, Charles-Marie
name: Lissorgues, Gaëlle
name: Gilles, Jean-Paul
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: ING-INF/01 Elettronica

description: Tunable micro-inductors can be designed controlling magnetic coupling coefficient.This paper presents the inductance variation produced by loops strongly magnetically coupled with a micro-inductor.A compact lumped element model,based on the geometry,gives result in good agreement with measurements in the RF frequency range.Then,this model will be applied to the study of the tunable MEMS inductor described below.
title: HAALSI - Health and Aging in Africa: A Longitudinal Study of an INDEPTH Community in South Africa
title: NACDA HAALSI Webinar
titleType: AlternativeTitle
Creators: name: Kapaon, David
name: Lavender, Kathryn
Publisher: name: My University
Year: 2021
Subjects: subject: data sharing
subject: health
subject: longitudinal
subject: cognition
subject: HIV
subject: Statistics and Numeric Data
subject: Social Sciences

description: PDF version of PPT slides from presentation
description: HAALSI is a population-based survey that aims to examine and characterize a population of older men and women in rural South Africa with respect to health, physical and cognitive function, aging, and well-being, in harmonization with other Health and Retirement Studies. In this webinar, we provide an overview of the HAALSI project, describe the importance of the data that have been collected, and discuss how to access and work with the HAALSI datasets. The recording can be found by visiting the NACDA YouTube playlist: https://youtube.com/playlist?list=PLqC9lrhW1VvYG4NZgSXKV4ZUm1x4tSZIC.
GaAs MEMS for Millimeter Wave Communications
Creators: name: Muller, Alexandru
name: Konstantinidis, George
name: Neculoiu, Dan
name: Plana, Robert
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: ING-INF/01 Elettronica

description: The paper presents the authors ’ contributions towards the development of millimeter wave circuits based on GaAs micromachining.The manufacturing and characterization of different type of millimeter wave GaAs membrane supported filter structures is presented.A fully monolithically integrated millimeter wave receiver module,having the antenna as well as the detecting Schottky diode on the same GaAs membrane is also presented.
Reliability Overview of RF MEMS Devices and Circuits
Creators: name: Melle, S.
name: Flourens, F.
name: Dubuc, D.
name: Grenier, K.
name: Pons, P.
name: Pressecq, F.
name: Kuchenbecker, J.
name: Muraro, J.L.
name: Bary, L.
name: Plana, R.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: ING-INF/01 Elettronica

description: non disponibile
Crowded by Your Absence
Creators: Tamara Deedman
Publisher: name: University of Alberta Library
Year: 2025

Beyond the threshold of the large rolling doors is a gateway - in lies a trove of treasures: cases of can tabs, binders filled with antique coins, and wardrobes crowded with family mementos, hand written archives and obsolete technology. Each item had been deemed precious, meticulously stored to preserve its original, ideal state. But as the dust settles, the burden (and pleasures) of her late father’s storage unit come into focus. How is she going to deal with it all?

Crowded by your Absence is about processing and transforming family archives – simultaneously treasured collections and hoarded trash – to wrestle with the phenomenon of object attachment as a coping mechanism. This body of work explores notions of human attachment to objects that hold both physical and emotional space, and how these occupy memory, identity, and grief. On a much more personal level, through her father’s archive, Deedman questions what objects can tell us about coping with embodied trauma. Positioning the work in conversation with her father’s belongings to explore how one “recognizes the embedded vulnerabilities of memory, inhibition, human existence, the precariousness of home, and the politics of belonging.” Through inherited objects. Navigating both her father’s absence and the surplus of his objects, Deedman explores how these items materialize relationships within domestic spaces. More importantly, considering how they mark endurance, trauma, and coping mechanisms; every collected item is a signifier and a reminder of her father’s addiction and substance abuse.
Entanglement Storage Units
Creators: name: Caneva, T.
name: Calarco, T.
name: Montangero, S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We introduce a protocol based on optimal control to drive many body quantum systems into long-lived entangled states, protected from decoherence by big energy gaps, without requiring any apriori knowledge of the system. With this approach it is possible to implement scalable entanglement-storage units. We test the protocol in the Lipkin-Meshkov-Glick model, a prototype many-body quantum system that describes different experimental setups, and in the ordered Ising chain, a model representing a possible implementation of a quantum bus.
Mobile Phone Power Amplifier Linearity and Efficiency Enhancement Using Digital Predistortion
Creators: name: Ceylan, N.
name: Mueller, J.E.
name: Pittorino, T.
name: Weigel, R.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: ING-INF/01 Elettronica

description: The new generation mobile communication systems using spectrum efficient linear modulation schemes (QPSK,8PSK,QAM)need linear power amplifiers in the transmission path to have good ACPR and EVM values. Linearization methods can be used to increase the linearity of the power amplifiers (PA).However,it is not reasonable o use complicated,power consuming and high cost systems. This paper presents a digital predistortion implementation for WCDMA signals using an FPGA (Field Programmable Gate Array)as DSP and investigates the application of this system in handsets.The method applied requires minimum change in the conventional transmitter path configuration but considerable PAE improvement can be achieved.
Carnitin-Palmitoyltransferase-Aktivität im Muskel von Patienten mit Maligner Hyperthermie
Creators: name: Weyhersmüller, Annika Sarah
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2010
Subjects: subject: Online-Publikation
subject: Hochschulschrift
subject: 617

description: Die Maligne Hyperthermie (MH) ist eine schwerwiegende, potentiell letale Komplikation der Allgemeinanästhesie mit genetischer Prädisposition. Die Diagnose kann durch den In-vitro-Kontraktur-Test (IVCT) gestellt werden. Das Enzym Carnitin-Palmitoyltransferase (CPT) ist am Transport langkettiger Fettsäuren in die Mitochondrien beteiligt. In früheren Arbeiten wurde bei Patienten mit MH ein CPT-Mangel postuliert. Ziel dieser Arbeit war daher die enzymatische Charakterisierung der CPT in Muskelbiopsien von Patienten mit durch IVCT gesicherter MH. Es konnte gezeigt werden, dass die CPT-Aktivität im Muskel von Patienten mit Prädisposition zur MH im Vergleich zu gesunden Kontrollen nicht erniedrigt ist und dass bei MH keine abnorme Regulierbarkeit der CPT vorliegt. Ein CPT-Mangel konnte daher in einer großen Gruppe von zur MH prädisponierten Patienten ausgeschlossen werden.
10 W High Efficiency 14V HBT Power Amplifier for Space Applications
Creators: name: Le Gallou, N.
name: Villemazet, J.F.
name: Cogo, B.
name: Cazaux, Jean-Louis
name: Mallet, A.
name: Lapierre, L.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: ING-INF/01 Elettronica

description: This paper presents the first development of a space-borne power amplifier using the recently developed high breakdown,high Power HBT HB20S process of UMS.The inverse F class Hybrid Power Amplifier has been designed using intensive simulation methods developed at Alcatel Space for MMICs,allowing to reach very high performances without manual tuning.The results 10 W /PAE >65%obtained with a single chip at 1.5 GHz demonstrate the capability of the process to handle with very high power densities and efficiencies.
Geotrogus Guerin-Meneville 1842
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Geotrogus

description: Geotrogus Guérin-Méneville, 1842, as Rhisotrogus [sic] (Geotrogus)
[43 species and 8 additional subspecies].
Type species Rhisotrogus (Geotrogus) magagnoscii Guérin-Méneville, 1842, by subsequent designation of Coca-Abia (2003).
Status revised to Geotrogus by Medvedev (1966).
Chthonobates Burmeister, 1855.
Introduced as a synonym of Geotrogus.
Apterogyna Harold, 1869b.
Introduced as a synonym of Rhizotrogus. Subsequently used by Marseul (1878) for three new species.
Pseudoapterogyna Escalera, 1914.
Replacement name for Apterogyna (credited to Reitter, 1902), not Apterogyna Latreille, 1809.
Synonymy by Coca-Abia (2003).
description: Published as part of Allsopp, Peter G. & Schoolmeesters, Paul, 2024, All genera of the world: Subfamilies Prototroginae, Cretoscarabaeinae, Dynamopodinae, Electrorubesopsinae, Phaenomeridinae, Orphninae, Allidiostomatinae, Aclopinae, Lichniinae, Melolonthinae, Oncerinae, Podolasiinae, Sericinae, Sericoidinae (Animalia: Arthropoda: Insecta: Coleoptera: Scarabaeidae), pp. 104-175 in Megataxa 12 (1) on page 129, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
Das unbekannte Chromatin? - Analysen zur epigenetischen Regulation in Keimbahnzellen von Drosophila melanogaster
Creators: name: Mietzsch, Sandy
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2012
Subjects: subject: Online-Publikation
subject: Hochschulschrift
subject: 576

description: Die epigenetische Regulation der Genexpression durch Chromatin- Faktoren ist während der gesamten Entwicklung ein zentraler Prozess, der die Differenzierung verschiedener Zelltypen kontrolliert. Über die Regulation und Organisation des Keimbahnchromatins ist in Drosophila sehr wenig bekannt. Die frühen (PGC) und späten (GSC) Keimbahnzellen weisen Unterschiede im Chromatinaufbau auf. Die H3K9 spezifischen KMTasen SU(VAR)3-9 und dSETDB1 zeigen eine entwicklungsspezifisch kontrollierte Aktivitäten in der Keimbahn, wobei der Verlust von dSETDB1 in adulten Weibchen zu rudimentären Ovarien führt. Auch die durch E(Z) katalysierte H3K27 Methylierung besitzt eine wichtige Funktion in der Keimbahnentwicklung und führt bei Verlust zu sehr stark reduzierten Ovarien in adulten Weibchen. Immunzytologische Analysen zeigen außerdem eine vielfältige Funktion des Ecdysonrezeptor-Koaktivators TAIMAN in der Keimbahn. Es existieren offensichtlich mehr molekulare Wege des Gensilencings in der Keimbahn als im Soma, die durch genetische Analysen gezeigt sind.
description: Epigenetic regulation of gene expression by chromatin factors is a central process during entire development controling differentiation of various cell types. In Drosophila almost nothing is known about regulation and organisation of germ line chromatin. Early (pgc) and late (gsc) germ cells show differences in chromatin structure. H3K9 specific KMTases SU(VAR)3-9 and dSETDB1 show differential controlled activities in germ line during development. Loss of dSETDB1 leads to rudimentary ovaries in adult females. Also E(Z) catalyzing H3K27 methylation is very important in germ line development. Loss of this protein also leads to strongly reduced ovaries in adult females. Immunocytological analysis also show a manifold function for EcR coactivator TAIMAN in germ line. Apparently more molecular ways of gene silencing are existing in germ line than in soma as shown by genetic analysis.
The Photoeccentric Effect and Proto-Hot Jupiters I. Measuring photometric eccentricities of individual transiting planets
Creators: name: Dawson, Rebekah I.
name: Johnson, John Asher
Publisher: name: arXiv
Year: 2012
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Exoplanet orbital eccentricities offer valuable clues about the history of planetary systems. Eccentric, Jupiter-sized planets are particularly interesting: they may link the "cold" Jupiters beyond the ice line to close-in hot Jupiters, which are unlikely to have formed in situ. To date, eccentricities of individual transiting planets primarily come from radial velocity measurements. Kepler has discovered hundreds of transiting Jupiters spanning a range of periods, but the faintness of the host stars precludes radial velocity follow-up of most. Here we demonstrate a Bayesian method of measuring an individual planet's eccentricity solely from its transit light curve using prior knowledge of its host star's density. We show that eccentric Jupiters are readily identified by their short ingress/egress/total transit durations -- part of the "photoeccentric" light curve signature of a planet's eccentricity --- even with long-cadence Kepler photometry and loosely-constrained stellar parameters. A Markov Chain Monte Carlo exploration of parameter posteriors naturally marginalizes over the periapse angle and automatically accounts for the transit probability. To demonstrate, we use three published transit light curves of HD 17156 b to measure an eccentricity of e = 0.71 +0.16/-0.09, in good agreement with the discovery value e = 0.67+/-0.08 based on 33 radial-velocity measurements. We present two additional tests using actual Kepler data. In each case the technique proves to be a viable method of measuring exoplanet eccentricities and their confidence intervals. Finally, we argue that this method is the most efficient, effective means of identifying the extremely eccentric, proto hot Jupiters predicted by Socrates et al. (2012).
description: ApJ, 756, 122. Received 2012 April 5; accepted 2012 July 9; published 2012 August 21
A Cost-Effective Kite State Estimator for Reliable Automatic Control of Kites
Creators: name: Peschel, Johannes
Publisher: name: Zenodo
Year: 2023
Subjects: airborne wind energy
kite power
automatic control
state estimation

description: Airborne Wind Energy (AWE) is a developing technology that uses tethered wings to harvest wind energy and convert it into electrical energy. Most of the AWE concepts that will be presented in this thesis have one common challenge: Estimating the position and the orientation of the kite, also called kite state, especially during highly dynamic flight
 situations. The focus of this thesis is first, to investigate, if angular sensors are feasible to obtain reliable position data and second, which fusion algorithm can be used to join the data of the angular and Global Navigation Satellite System (GNSS) sensors. The TU Delft prototype is a suitable testing platform for this purpose. The author added angular sensors to the ground station of the TU Delft AWE system that measure the elevation and the horizontal displacement of the tether holding the kite. They are mounted on a modular stainless steel construction, which has low wear and a long lifetime. The author used the tether length and the angular data to obtain a new position. This position was merged with the two GNSS positions that were already attached to the kite. The angular sensors were able to measure with a resolution of <0.01°. The elevation and azimuth position of the kite had an error of less than 0.7° as long as the tether force was higher than 2000N. One of the GNSS sensors provided reliable data during low force phases. A reliable position in all flight conditions could be obtained by using double exponential smoothing prediction to merge both positions. This development enables the implementation of a reliable kite power control system.
Stigma and confidentiality as barriers to uptake of HIV counseling and testing for health workers in 3 public hospitals in Free State province, South Africa : a mixed-methods study
Creators: name: Khan, Rabia
Publisher: name: University of British Columbia
Year: 2013

description: Background: The HIV and AIDS epidemic has created a human resource crisis that “has replaced financial issues as the most serious obstacle to implementing national treatment plans” (WHO 2006a: 20). To retain the existing health workforce, international guidelines promote priority access to health services for health workers (HWs) through occupationally-based HIV counseling and testing (HCT) services. Such services have been implemented in South Africa (RSA), however recent evidence suggests their uptake is low. Objective: To identify barriers and facilitators to uptake of HCT services by HWs in three hospitals in Free State province, RSA. Methods: This mixed-methods study analyzed a portion of a self-administered survey and focus groups interviews (FGIs) to explore participants’ attitudes and behaviours related to HIV in the workplace, why HIV services may be underutilized and participants’ recommendations to improve the service. Results: In total, 978 HWs participated in the survey and 38 participated in the FGIs. Among survey respondents, 38.9% indicated a fear that confidentiality will not be maintained as the reason for not using OHS-based HIV services. 38.5% HWs perceive there is HIV stigma in the workplace. Six themes were identified from the FGIs, including location for testing, privacy, confidentiality, gossip, stigma and facilitators. FG participants perceived doctors’ and nurses’ experience with HIV in the workplace differs from other HWs, supported by multivariate analyses indicating patient-care HWs (PCHWs) have higher odds of perceiving confidentiality is not maintained in the OHS (adjusted ORs = 2.3; 95% CI 1.8-3.2) and perceiving HIV stigma in the workplace (adjusted OR = 2.4; 95% CI 1.8-3.2) when compared to non-PCHWs. FG participants also identified the need for in-service training on a range of topics related to HIV and expressed a desire to form HIV support groups to address negative attitudes toward HIV/AIDS in the workplace. Conclusions: Fear of breaches in confidentiality and HIV stigma were identified as the primary barriers to uptake of occupationally-based HCT by HWs. Overcoming these barriers require educating HWs on policies and guidelines that govern HIV in the workplace, implement measures to ensure confidentiality is maintained and addressing HIV stigma through stigma reduction interventions.
Metric-Palatini gravity unifying local constraints and late-time cosmic acceleration
Creators: name: Harko, Tiberiu
name: Koivisto, Tomi S.
name: Lobo, Francisco S. N.
name: Olmo, Gonzalo J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present a novel approach to modified theories of gravity that consists of adding to the Einstein-Hilbert Lagrangian an f(R) term constructed a la Palatini. Using the respective dynamically equivalent scalar-tensor representation, we show that the theory can pass the Solar System observational constraints even if the scalar field is very light. This implies the existence of a long-range scalar field, which is able to modify the cosmological and galactic dynamics, but leaves the Solar System unaffected. We also verify the absence of instabilities in perturbations and provide explicit models which are consistent with local tests and lead to the late-time cosmic acceleration.
description: 5 pages, no figures. Updated to match the published version
New media in planning : a critical review
Creators: name: Dunn, William Bruce
Publisher: name: University of British Columbia
Year: 2013

description: Planning practice is changing. New media, which can be understood as Internet-enabled digital communications technologies—online social networks, online surveys, and online message boards, as examples—are increasingly used in public engagement processes. These new tools have been said to make public engagement more inclusive and less costly, as well as improve communication among those involved. Research, in the form of key informant interviews and a broad literature review, does not fully support these claims. Moreover, the increased use of new media is accompanied by a number of unforeseen negative effects. For these reasons, it is from now on the responsibility of planners: to understand the limitations of the new tools at their disposal, and to further contribute to this area of inquiry.
Perturbations to μ-τ symmetry in neutrino mixing
Creators: name: Liao, Jiajun
name: Marfatia, D.
name: Whisnant, K.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Many neutrino mixing scenarios that have μ-τsymmetry with θ_{13}=0 are in disagreement with recent experimental results that indicate a nonzero value for θ_{13}. We investigate the effect of small perturbations on Majorana mass matrices with μ-τsymmetry and derive analytic formulae for the corrections to the mixing angles. We find that since m_1 and m_2 are nearly degenerate, μ-τsymmetry mixing scenarios are able to explain the experimental data with about the same size perturbation for most values of θ_{12}. This suggests that the underlying unperturbed mixing need not have θ_{12} close to the experimentally preferred value. One consequence of this is that a new class of models with μ-τsymmetry is possible, with unperturbed θ_{12} equal to zero or 90 degrees for arbitrary unperturbed θ_{13}.
description: 9 pages, 4 tables. Version to appear in PRD
Main achievements to date toward the use of RF MEMS into space satellite payloads
Creators: name: Vendier, O.
name: Paillard, M.
name: Legay, H.
name: Schaffauser, C.
name: Forrestier, S.
name: Caille, G.
name: Drevon, C.
name: Cazaux, Jean-Louis
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2005
Subjects: ING-INF/01 Elettronica

description: MEMS (Microelectromechanical Systems)
technology plays a key role in the on-going miniaturization
of electronic modules for automotive and consumer
electronic products. In the microwave field, RF MEMS
switches exhibit excellent RF properties as low power
consumption, high linearity, low loss and high isolation
compared to solid state electronic solutions. Based on these
performances, we will present a status of the potentialities of
RF-MEMS devices for application to future generation of
space satellite payloads through some selected
demonstrations achieved within Alcatel Space.
Glacilitarsus Matsumoto 2014
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Glacilitarsus

description: Glacilitarsus Matsumoto, 2014a
[2 species].
Type species Holotrichía clypealis Brenske, 1896, by original designation.
description: Published as part of Allsopp, Peter G. & Schoolmeesters, Paul, 2024, All genera of the world: Subfamilies Prototroginae, Cretoscarabaeinae, Dynamopodinae, Electrorubesopsinae, Phaenomeridinae, Orphninae, Allidiostomatinae, Aclopinae, Lichniinae, Melolonthinae, Oncerinae, Podolasiinae, Sericinae, Sericoidinae (Animalia: Arthropoda: Insecta: Coleoptera: Scarabaeidae), pp. 104-175 in Megataxa 12 (1) on page 129, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
RF-MEMS switches based on a low-complexity technology and related aspects of MMIC integration
Creators: name: Ziegler, V.
name: Siegel, C.
name: Schönlinner, B.
name: Prechtel, U.
name: Schumacher, H.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2005
Subjects: ING-INF/01 Elettronica

description: This paper presents RF-MEMS devices,
which are based on low-complexity fabrication technologies.
Tuneable filters and phase shifting elements for Ka-band
have already been realized by using a fabrication process
which requires only two photo-lithographic steps. Adding
just one more lithographic process step results in the
realization of high performance switching devices with
insertion losses of -0.2dB at 30GHz. Due to their low
fabrication complexity, all these RF-MEMS devices
minimize technological challenges and have the potential for
being highly reliable due to their design principle. In
addition, these technologies may pave the way for the
monolithic integration of RF-MEMS based circuits with
compound semiconductor MMICs for highly integrated and
high performance multi-functional circuits.
Molekulare Charakterisierung der Typ III-sekretionsassoziierten Proteine HrpB2 und HpaC aus Xanthomonas campestris pv. vesicatoria
Creators: name: Schulz, Steve
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2013
Subjects: subject: Online-Publikation
subject: Hochschulschrift
subject: 579
subject: 570
subject: 579.1

description: Für die Pathogenität des Bakteriums Xanthomonas campestris pv. vesicatoria ist das Typ III-Sekretionssystem (T3S-System) essentiell. Voraussetzung für ein funktionales T3S-System ist der Pathogenitätsfaktor HrpB2. Die Substratspezifität des T3S-Systems wird u.a. durch das Protein HpaC kontrolliert. In dieser Arbeit wurden HrpB2 und HpaC funktionell charakterisiert. In der C-terminalen Region von HrpB2 wurde das konservierte VxTLxK-Aminosäuremotiv identifiziert. Das VxTLxK-Motiv ist essentiell für die Proteinfunktion. HrpB2 unterstützt vermutlich als periplasmatische Komponente den Aufbau des T3S-Pilus. Analysen mit HpaC-Derivaten zeigten, dass die N- und C-terminale Region von HpaC für einen Wechsel der Substratspezifität erforderlich ist. Die Aminosäuren 112 bis 212 aus HpaC stellen eine potentielle T3S4 („type III secretion substrate specificity switch“)-Domäne dar. Für die Proteinfunktion von HpaC ist ein konserviertes Phenylalanin an der Aminosäureposition 175 essentiell.
description: The plant pathogenic bacterium Xanthomonas campestris pv. vesicatoria possesses a type III secretion system (T3S-System), which is essential for pathogenicity. Essential for a functional T3S-System is the pathogenicity factor HrpB2. The substrate specificity of the T3S-System depends on the switch protein HpaC. In this study, HrpB2 and HpaC were functionally characterized. It was possible to identify the conserved VxTLxK-motif in the C-terminal region of HrpB2. The VxTLxK motif is essential for the protein function. HrpB2 probably promotes the assembly of the pilus in the periplasm. Analyses with HpaC derivatives revealed, that the N-and C-terminal region of HpaC is required for the switch in the substrate specificity. Additional studies showed also that the amino acids 112 to 212 represents a potential T3S4 (type III secretion substrate specificity switch)-domain. Additionally, a conserved phenylalanine could be identified, which is essential the protein function of HpaC.
Additional file 6 of Fungal and bacterial microbiome dysbiosis and imbalance of trans-kingdom network in asthma
Creators: name: Huang, Chunrong
name: Yu, Youchao
name: Du, Wei
name: Liu, Yahui
name: Dai, Ranran
name: Tang, Wei
name: Wang, Ping
name: Zhang, Chenhong
name: Shi, Guochao
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Physiology
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Infectious Diseases
subject: FOS: Health sciences

description: Additional file 6: Table S3. Relative abundance of top 15 genera in airway mycobiome differing significantly between CON and untreated asthma group.
A note on Lagrangian cobordisms between Legendrian submanifolds of R^{2n+1}
Creators: name: Golovko, Roman
Publisher: name: arXiv
Year: 2011
Subjects: subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics

description: We study the relation of an embedded Lagrangian cobordism between two closed, orientable Legendrian submanifolds of R^{2n+1}. More precisely, we investigate the behavior of the Thurston-Bennequin number and (linearized) Legendrian contact homology under this relation. The result about the Thurston-Bennequin number can be considered as a generalization of the result of Chantraine which holds when n = 1. In addition, we provide a few constructions of Lagrangian cobordisms and prove that there are infinitely many pairs of exact Lagrangian cobordant and not pairwise Legendrian isotopic Legendrian n-tori in R^{2n+1}.
description: 14 pages, 2 figures; improved exposition, many minor corrections, this version has been accepted for publication in the Pacific Journal of Mathematics
Additional file 7 of Fungal and bacterial microbiome dysbiosis and imbalance of trans-kingdom network in asthma
Creators: name: Huang, Chunrong
name: Yu, Youchao
name: Du, Wei
name: Liu, Yahui
name: Dai, Ranran
name: Tang, Wei
name: Wang, Ping
name: Zhang, Chenhong
name: Shi, Guochao
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Physiology
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Infectious Diseases
subject: FOS: Health sciences

description: Additional file 7: Table S4. Relative abundance of top 15 genera in airway mycobiome differing significantly between untreated asthma and ICS asthma group.
Power measures derived from the sequential query process
Creators: name: Pritchard, Geoffrey
name: Reyhani, Reyhaneh
name: Wilson, Mark C.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Combinatorics (math.CO)
subject: Computer Science and Game Theory (cs.GT)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 91B12

description: We study a basic sequential model for the discovery of winning coalitions in a simple game, well known from its use in defining the Shapley-Shubik power index. We derive in a uniform way a family of measures of collective and individual power in simple games, and show that, as for the Shapley-Shubik index, they extend naturally to measures for TU-games. In particular, the individual measures include all weighted semivalues. We single out the simplest measure in our family for more investigation, as it is new to the literature as far as we know. Although it is very different from the Shapley value, it is closely related in several ways, and is the natural analogue of the Shapley value under a nonstandard, but natural, definition of simple game. We illustrate this new measure by calculating its values on some standard examples.
description: 13 pages, to appear in Mathematical Social Sciences
Homodyne estimation of Gaussian quantum discord
Creators: name: Blandino, Rémi
name: Genoni, Marco G.
name: Etesse, Jean
name: Barbieri, Marco
name: Paris, Matteo G. A.
name: Grangier, Philippe
name: Tualle-Brouri, Rosa
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We address the experimental estimation of Gaussian quantum discord for two-mode squeezed thermal state, and demonstrate a measurement scheme based on a pair of homodyne detectors assisted by Bayesian analysis which provides nearly optimal estimation for small value of discord. Besides, though homodyne detection is not optimal for Gaussian discord, the noise ratio to the ultimate quantum limit, as dictacted by the quantum Cramer-Rao bound, is limited to about 10 dB.
description: 5+3 pages, 3 figures, published version
IC compatible MEMS technology
Creators: name: Grenier, K.
name: Mazenq, L.
name: Dubuc, D.
name: Bouchriha, F.
name: Coccetti, F.
name: Ojefors, E.
name: Lindberg, P.
name: Rydberg, A.
name: Berntgen, J.
name: Rabe, W.J.
name: Sonmez, E.
name: Abele, P.
name: Schumacher, H.
name: Plana, R.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2005
Subjects: ING-INF/01 Elettronica

description: This paper deals with an Integrated
Circuits (ICs) compatible MEMS technology, which
is used to elaborate an ultra compact RF
communication module centered at 24GHz. This
technology uses conventional equipments and is in
adequation with millimeterwave applications. A
compatibility test protocol has consequently been
defined in order to check that each technological step
does not degrade the SiGe circuits’ performances.
Finally, the realized demonstrator present a total
surface of only 9mm².
Integration Aspects of RF-MEMS Technologies
Creators: name: Lisec, T.
name: Wagner, B.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2005
Subjects: ING-INF/01 Elettronica

description: This paper presents an overview about existing
fabrication and packaging solutions for RF MEMS
switches with regard to an integration with other passive
or active devices. Achievements and problems are
discussed from a technological point of view.
Comparison of load-pull measurement results of a 4W pHEMT
involving five european laboratories
Creators: name: Lees, Jonathan
name: Benedikt, Johannes
name: Bunz, B.
name: Gaquiere, Christophe
name: Ducatteau, D.
name: Marquez-Segura, E.
name: Martin-Guerrero, T.M.
name: Barel, Alain
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2005
Subjects: ING-INF/01 Elettronica

description: Load and source pull measurement data has
for some time now been a critical and integral part of the
power amplifier design process, offering accurate
performance data of the actual device that is to be used.
This data can be used directly to generate graphical
representations of key parameters such as output power,
efficiency and gain as functions of source and load
impedance, for model verification or perhaps more
interestingly as the basis of a model itself. There are a
number of excellent research groups across Europe looking
into these interesting areas, however until recently,
collaboration and dissemination of information has been
limited. TARGET, a network of excellence has provided a
close working relationship between these groups where, for
the first time these key capabilities have been compared and
contrasted.
Partition Calculus and Cardinal Invariants
Creators: name: Garti, Shimon
name: Shelah, Saharon
Publisher: name: arXiv
Year: 2011
Subjects: subject: Logic (math.LO)
subject: FOS: Mathematics
subject: 03E05, 03E35

description: We prove that the strong polarized relation of $θ$ above $ω$ applied simultaneously for every cardinal in the interval $[\aleph_1,\aleph]$ is consistent. We conclude that this positive relation is consistent for every cardinal invariant on the continuum. We show that similar results hold for a supercompact cardinal, and for a strong limit singular under some assumptions.
description: 13 pages
Measuring and modelling a microwave amplifier by means of the LSNA
Creators: name: Van Moer, Wendy
name: Yves, Rolain
name: Alain, Barel
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2005
Subjects: ING-INF/01 Elettronica

description: A measurement based model for a microwave system operating in a power range up to several dB’s of compression over its full operation frequency band is proposed. 
The measurements of the nonlinear behavior of the amplifier are performed with the Large Signal Network Analyzer. The model uses a limited amount of parameters, is easy to implement in an existing simulator, does not require the publishing of internal schematics, and predicts the response of the component over its whole working area. This model is
hence a candidate for inclusion in data sheets.
Herstellung und Charakterisierung epitaktischer Fe(001)/MgO/Fe-Tunnelmagnetowiderstände
Creators: name: Ullmann, Dirk
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2002
Subjects: Elektronische Publikation
Hochschulschrift
Zsfassung in engl. Sprache

description: Die vorliegende Arbeit befasst sich mit der Herstellung und Charakterisierung epitaktischer Fe/MgO/Fe - Schichtsysteme unter Berücksichtigung ihrer vermuteten Eignung zur Herstellung von Tunnelmagnetowiderständen mit besonders großer Abhängigkeit des Tunnelwiderstandes von der magnetischen Konfiguration. Die strukturellen und elektronischen Eigenschaften durch Laserablation hergestellter Fe(001)/MgO/Fe - Schichtsysteme wurden untersucht und mit bereits aus der Literatur bekannten Eigenschaften thermisch hergestellter Fe(001)/MgO/Fe - Schichtsysteme verglichen. TMR-Messungen an mechanisch kontaktierten Proben ergaben eine relative Änderung der Leitfähigkeit von 0,5 %.
description: This thesis is concerned with the growth and characterization of epitaxial Fe(001)/MgO/Fe trilayers with consideration of their assumed suitability for the production of tunnelling magneto resistors with particularly strong dependence of their tunnelling resistance on the magnetic configuration. The structural and electronic properties of Fe(001)/MgO/Fe trilayers made by PLD have been examined and compared with properties of corresponding systems with thermally grown MgO layers as described in literature. TMR measurements on mechanically contacted samples resulted in a relative change of the conductivity of 0,5 %.
Nonlinear mushy-layer convection with chimneys: stability and optimal solute fluxes
Creators: name: Wells, Andrew J.
name: Wettlaufer, John S.
name: Orszag, Steven A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We model buoyancy-driven convection with chimneys -- channels of zero solid fraction -- in a mushy layer formed during directional solidification of a binary alloy in two-dimensions. A large suite of numerical simulations is combined with scaling analysis in order to study the parametric dependence of the flow. Stability boundaries are calculated for states of finite-amplitude convection with chimneys, which for a narrow domain can be interpreted in terms of a modified Rayleigh number criterion based on the domain width and mushy-layer permeability. For solidification in a wide domain with multiple chimneys, it has previously been hypothesised that the chimney spacing will adjust to optimise the rate of removal of potential energy from the system. For a wide variety of initial liquid concentration conditions, we consider the detailed flow structure in this optimal state and derive scaling laws for how the flow evolves as the strength of convection increases. For moderate mushy-layer Rayleigh numbers these flow properties support a solute flux that increases linearly with Rayleigh number. This behaviour does not persist indefinitely, however, with porosity-dependent flow saturation resulting in sub-linear growth of the solute flux for sufficiently large Rayleigh numbers. Finally, we consider the influence of the porosity dependence of permeability, with a cubic function and a Carmen-Kozeny permeability yielding qualitatively similar system dynamics and flow profiles for the optimal states.
description: 20 pages, 10 figures. Changes from previous version correct typos, expand on discussion of the method including new appendix A, and minor changes to the discussion. A modified final version has been accepted for publication in the Journal of Fluid Mechanics