cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
k-Sums in abelian groups
Creators: name: Girard, Benjamin
name: Griffiths, Simon
name: Hamidoune, Yahya Ould
Publisher: name: arXiv
Year: 2011
Subjects: subject: Combinatorics (math.CO)
subject: Group Theory (math.GR)
subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: Given a finite subset A of an abelian group G, we study the set k \wedge A of all sums of k distinct elements of A. In this paper, we prove that |k \wedge A| >= |A| for all k in {2,...,|A|-2}, unless k is in {2,|A|-2} and A is a coset of an elementary 2-subgroup of G. Furthermore, we characterize those finite subsets A of G for which |k \wedge A| = |A| for some k in {2,...,|A|-2}. This result answers a question of Diderrich. Our proof relies on an elementary property of proper edge-colourings of the complete graph.
description: 15 pages
Gurania bignoniacea Jeffrey
Creators: name: Araújo, Diogo
name: Alves, Marccus
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Cucurbitales
Cucurbitaceae
Gurania
Gurania bignoniacea

description: 32. Gurania bignoniacea (Poepp. & Endl.) Jeffrey (Fig. 2B)
Venezuela, Colombia, Ecuador, Peru, Bolivia, Brazil (Amazonas, Pará, Pernambuco, Alagoas, Bahia) (Kearns 1998).
Selected Voucher—Piedade, Araújo et al. 381 (UFP).
description: Published as part of Araújo, Diogo & Alves, Marccus, 2010, Climbing plants of a fragmented area of lowland Atlantic Forest, Igarassu, Pernambuco (northeastern Brazil), pp. 1-24 in Phytotaxa 8 on page 17, DOI: 10.11646/phytotaxa.8.1.1, http://zenodo.org/record/4893863
Indium Phosphide MMIC Low Noise Amplifier and
related cryogenically applications in a
Radioastronomical Focal Plane Array Receiver
Creators: name: Cremonini, A.
name: Carbonaro, L.
name: Mariotti, S.
name: Natale, V.
name: Nesti, R.
name: Orfei, S.
name: Roda, J.
name: Tofani, G.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2004
Subjects: ING-INF/01 Elettronica

description: We will present realisations of MMIC Low
Noise amplifiers designed to operate in a cryogenic
environment, working from 18 to 26 GHz. These devices
have been produced with the intent to be installed in a five
beams feed array receiver, realised to improve the single dish
survey and VLBI performances of the 32m diameter
parabolic dish antenna of the Medicina Radioastronomical
Station, near Bologna, in Italy. The entire project named
FARADAY has been developed in the FP-5 context
supported by EU. Many efforts has been concentrated to
produce devices with the best compromise between lowest
noise, flat gain, and good input matching. For this device,
MMIC 0,1 um gate length InP HEMT process has been
used. We will start the work description from the design
specification to the on wafer devices measurements. We will
also introduce our packaging material investigations in
order to have a reliable working device at cryogenic
temperature. Packaging device efforts has been devoted also
to realise a modular carrier that let the choice between
coaxial and waveguide interface.
MMIC GaAs and InP Very Low Noise Amplifier
Designs for the Next Generation Radio Telescopes
Creators: name: Witvers, R.H.
name: Bij De Vaate, J.G.
name: Sarmasanu, A.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2004
Subjects: ING-INF/01 Elettronica

description: This paper describes different approaches to
develop very low noise amplifiers for the next generation of
radio telescopes. We do research to evaluate which process
is most suitable to be used in the radio telescopes, we also
make novel designs that will make the most of the present
processes. To evaluate the processes we designed and
measured comparable designs in the different processes. For
this the focus has been mainly on the III/IV processes GaAs
and InP. This paper will discus three different designs. Two
comparable designs to evaluate the processes and the third
is a differential design.
Characterizing the oral health of low-income adults in Vancouver's Downtown Eastside
Creators: name: Hau, Keith Pak-Hei
Publisher: name: University of British Columbia
Year: 2014

description: Low-income residents from the Vancouver’s Downtown Eastside (DTES) are known to be medically underserved, but little is known about their oral health (OH) status. The objectives of this study are to: 1) determine OH characteristics (clinical and subjective) of low-income adults in this community; 2) identify explanatory factors for their OH status. Material and Methods: Screening clinics were set up in the DTES. Eligibility criteria were adults 19 years of age or over and residence in the DTES for the preceding 3 months. Data were collected through questionnaires and clinical examinations. Results: Among the 356 screened participants, most were males, middle-aged, less educated, and living with low-income (≤$20,000/year). Alcohol and tobacco consumption was common. About 80% had dental coverage, mostly publicly funded benefits (94%). Fifty (14%) participants were edentulous. Dentate participants (n=306), on average, had 3.8 decayed (Dt), 8.6 missing (Mt), 4.9 filled (Ft), 17.2 DMF teeth, and a care index (CI) of 41.5%. Many (86%) perceived a dental need. Although more participants with dental insurance had a dental visit within the past 12 months, there were no differences in OH indices between those with or without dental insurance. After adjusting gender and recruitment site, social (barriers to care & length of DTES residence), behavioural (brush/floss), and personal (HCV/methadone) factors were identifiable explanatory factors for the CI level. Conclusion: DTES low-income have poor oral health status and many perceive a need for dental care. We identified several factors that may affect their levels of dental care; however, this community may inherited more complicated social issues. Further investigations to truly understand their challenges and needs are required for a better oral health promotion in this community.
On the Stability of Coherent States for Pais-Uhlenbeck Oscillator
Creators: name: Pramanik, Souvik
name: Ghosh, Subir
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We have constructed coherent states for the higher derivative Pais-Uhlenbeck Oscillator. In the process we have suggested a novel way to construct coherent states for the oscillator having only negative energy levels. These coherent states have negative energies in general but their coordinate and momentum expectation values and dispersions behave in an identical manner as that of normal (positive energy) oscillator. The coherent states for the Pais-Uhlenbeck Oscillator have constant dispersions and a modified Heisenberg Uncertainty Relation. Moreover, under reasonable assumptions on parameters these coherent states can have positive energies.
description: Title changed, modified version with no major change in results and conclusions, to appear in Mod.Phys.Lett. A
Anomalous scaling and large-scale anisotropy in magnetohydrodynamic turbulence: Two-loop renormalization-group analysis of the Kazantsev--Kraichnan kinematic model
Creators: name: Antonov, N. V.
name: Gulitskiy, N. M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences
subject: 76F30

description: The field theoretic renormalization group and operator product expansion are applied to the Kazantsev--Kraichnan kinematic model for the magnetohydrodynamic turbulence. The anomalous scaling emerges as a consequence of the existence of certain composite fields ("operators") with negative dimensions. The anomalous exponents for the correlation functions of arbitrary order are calculated in the two-loop approximation (second order of the renormalization-group expansion), including the anisotropic sectors. The anomalous scaling and the hierarchy of anisotropic contributions become stronger due to those second-order contributions.
description: 7 pages, LaTeX source. Eqns. (9) and (11) corrected
Synthese und Reaktionsverhalten von 1-(3,5-Di-tert.-butyl-4-hydroxyphenyl)-2-propenderivaten - Darstellung von Wirkstoffen zur Beeinflussung der Arachidonsäurekaskade
Creators: name: Schmidt, Christine
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2000
Subjects: Elektronische Publikation
Zsfassung in engl. Sprache

description: Die durch die Enzyme Cyclooxygenase und Lipoxygenase gebildeten Metabolite der Arachidonsäure spielen eine zentrale Rolle bei einer Vielzahl entzündlicher Erkrankungen. Durch die Entwicklung selektiver Lipoxygenase- bzw. Dualhemmer für diese Enzyme eröffnen sich dafür neue, nebenwirkungsarme Therapiemöglichkeiten. Die Derivate des bekannten Antioxidans 3,5-Di-tert.-butyl-4-hydroxytoluens (BHT) stellen dabei eine der aussichtsreichsten Verbindungsklassen dar. Die Arbeit beschreibt die systematische Darstellung zahlreicher neuer 3,5-Di-tert.-butyl-4-hydroxyphenylderivate mit einer β-γ-ständigen Doppelbindung zum Phenylkern, die umfangreichen Untersuchungen zu deren Reaktionsverhalten und die Resultate des Screenings der cyclooxygenase- und lipoxygenasehemmenden Aktivität. Mit Hilfe der Testergebnisse werden erste Rückschlüsse hinsichtlich Struktur-Wirkungs-Beziehungen innerhalb dieser bislang unerforschten Substanzklasse gezogen. Außerdem beinhaltet die Arbeit die Ergebnisse der Überprüfung der cancerostatischen Wirksamkeit ausgewählter Vertreter, welche erstmals für diese Verbindungen nachgewiesen werden konnte.
description: The metabolites of arachidonic acid are involved in a lot of diseases characterized by inflammation. The formation of them is catalyzed by the enzymes cyclooxygenase and lipoxygenase. Inhibitors of lipoxygenase or dual inhibitors of both enzymes should be an attractive alternative to available therapeutic possibilities. The derivatives of the well known antioxidant 3,5-di-tert.-butyl-4-hydroxytoluene are one of the most favourite class of compounds in this field. The work describes the systematic synthesis of numerous novel derivatives with a 3,5-di-tert.-butyl-4-hydroxyphenyl moiety and a double bond in β-γ-position to it and the characterisation of their reaction properties. We also report the screening results of cyclooxygenase and lipoxygenase inhibition and draw some conclusions regarding the structure activity relationships. In addition a cancerostatic activity was determined for chosen compounds which was unknown as yet.
Gurania spinulosa Cogn.
Creators: name: Araújo, Diogo
name: Alves, Marccus
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Cucurbitales
Cucurbitaceae
Gurania
Gurania spinulosa

description: 33. Gurania spinulosa (Poepp. & Endl.) Cogn.
Venezuela, Ecuador, Bolivia, Brazil (Acre, Rondônia, Pernambuco) (Kearns 1998).
Selected Voucher:—Piedade, Araújo et al. 402 (UFP).
description: Published as part of Araújo, Diogo & Alves, Marccus, 2010, Climbing plants of a fragmented area of lowland Atlantic Forest, Igarassu, Pernambuco (northeastern Brazil), pp. 1-24 in Phytotaxa 8 on page 17, DOI: 10.11646/phytotaxa.8.1.1, http://zenodo.org/record/4893863
Investigating the retention of intermediate-mass black holes in star clusters using N-body simulations
Creators: name: Konstantinidis, Symeon
name: Amaro-Seoane, Pau
name: Kokkotas, Kostas D.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Contrary to supermassive and stellar-mass black holes (SBHs), the existence of intermediate-mass black holes (IMBHs) with masses ranging between 10^{2-5} Msun has not yet been confirmed. The main problem in the detection is that the innermost stellar kinematics of globular clusters (GCs) or small galaxies, the possible natural loci to IMBHs, are very difficult to resolve. However, if IMBHs reside in the centre of GCs, a possibility is that they interact dynamically with their environment. A binary formed with the IMBH and a compact object of the GC would naturally lead to a prominent source of gravitational radiation, detectable with future observatories. We use N-body simulations to study the evolution of GCs containing an IMBH and calculate the gravitational radiation emitted from dynamically formed IMBH-SBH binaries and the possibility that the IMBH escapes the GC after an IMBH-SBH merger. We run for the first time direct-summation integrations of GCs with an IMBH including the dynamical evolution of the IMBH with the stellar system and relativistic effects, such as energy loss in gravitational waves (GWs) and periapsis shift, and gravitational recoil. We find in one of our models an intermediate mass-ratio inspiral (IMRI), which leads to a merger with a recoiling velocity higher than the escape velocity of the GC. The GWs emitted fall in the range of frequencies that a LISA-like observatory could detect, like the European eLISA or in mission options considered in the recent preliminary mission study conducted in China. The merger has an impact on the global dynamics of the cluster, as an important heating source is removed when the merged system leaves the GC. The detection of one IMRI would constitute a test of GR, as well as an irrefutable proof of the existence of IMBHs.
description: Accepted for publication by A&A, minor modifications
Dunkl Operators as Covariant Derivatives in a Quantum Principal Bundle
Creators: name: Durdevich, Micho
name: Sontz, Stephen Bruce
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: Classical Analysis and ODEs (math.CA)
subject: Rings and Algebras (math.RA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: A quantum principal bundle is constructed for every Coxeter group acting on a finite-dimensional Euclidean space $E$, and then a connection is also defined on this bundle. The covariant derivatives associated to this connection are the Dunkl operators, originally introduced as part of a program to generalize harmonic analysis in Euclidean spaces. This gives us a new, geometric way of viewing the Dunkl operators. In particular, we present a new proof of the commutativity of these operators among themselves as a consequence of a geometric property, namely, that the connection has curvature zero.
Additional file 3 of The impacts of multiple obesity-related interventions on quality of life in children and adolescents: a randomized controlled trial
Creators: name: Diao, Hua
name: Wang, Hong
name: Yang, Lianjian
name: Li, Ting
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Science Policy

description: Additional file 3.
Observation of spin correlation in ttbar events from pp collisions at sqrt(s) = 7 TeV using the ATLAS detector
Creators: name: ATLAS Collaboration
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A measurement of spin correlation in ttbar production is reported using data collected with the ATLAS detector at the LHC, corresponding to an integrated luminosity of 2.1 fb^-1. Candidate events are selected in the dilepton topology with large missing transverse energy and at least two jets. The difference in azimuthal angle between the two charged leptons in the laboratory frame is used to extract the correlation between the top and antitop quark spins. In the helicity basis the measured degree of correlation corresponds to 0.40 +0.09 -0.08, in agreement with the next-to-leading-order Standard Model prediction. The hypothesis of zero spin correlation is excluded at 5.1 standard deviations.
description: 6 pages plus author list (20 pages total), 2 figures, 2 tables, revised author list, matches Physical Review Letters version
Embeddings of infinitely connected planar domains into C^2
Creators: name: Forstneric, Franc
name: Wold, Erlend Fornaess
Publisher: name: arXiv
Year: 2011
Subjects: subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 32C22, 32E10, 32H05, 32M17, 14H55

description: We prove that every circled domain in the Riemann sphere admits a proper holomorphic embedding to C^2. Our methods also apply to circled domains with punctures, provided that all but finitely many of the punctures belong to the closure of the set of complementary discs.
description: Analysis and PDE, to appear
Gallium Arsenide components in the evolution of on-board satellite communication equipments
Creators: name: Comparini, M.C.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1992
Subjects: ING-INF/01 Elettronica

description: Direct Digital Synthesis technique is fast evolving and is becoming a key point in the design of advanced communication equipments. The growing interest in the use of such a type of technique is strictly related to the increase of speed and bandwidth in the components and the corresponding achievement of attractive performance in terms of frequency resolution and spectral purity. The increase in the synthesised bandwidth forces the use of very high speed technologies and the use of gallium arsenide devices becomes mandatory to obtain the required performance. The gallium arsenide technology has been playing since many years ago a key role in high-speed analog communication, electronic warfare and analog MMICs but in the recent past has become an astounding weapon also for digital applications. Furthermore processes which combine low-power RF analog and LSI digital functions are now available and they represents a valid alternative to using discrete-components and multichip hybrids for low-power microwave designs. After a brief review of the DDS concept the paper describes the basic design of the Gallium arsenide numerically controlled oscillator which is the key element of the DDS chain. The experimental results are shown with a particular attention to the spectral purity performance and the modulation capability. The trend of the future on-board applications is given with emphasis on the projects in which Alenia Spazio is presently reusing this specific development.
Pragmatische Transdisziplinarität - heterogene Akteure im Spannungsfeld zwischen Wissenschaft und Anwendung am Beispiel der integrativen Sanierungsforschung in SAFIRA II
Creators: name: Weiss, Vivien
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2011
Subjects: subject: 300

description: Ein mit dem Auftreten neuer Formen der Wissensproduktion einhergehender Wandel der Wissenschaft wird in der Wissenschaftsforschung bereits seit längerem diagnostiziert. Vor diesem Hintergrund wurden Diskussionen darüber entfacht, ob und ggf. wie sich die Rolle der Wissenschaft in der ‚Wissensgesellschaft‘ ändert und welche Implikationen solche Veränderungen haben können. Ob es sich bloß um normative Forderungen an die Wissenschaft handelt, oder sich diese Veränderungen tatsächlich in der Forschungsrealität widerspiegeln, ist der zentrale Ausgangspunkt dieser Dissertation. Sie leistet anhand eines Fallbeispiels aus der Umweltforschung einen empirischen Beitrag zu der Frage, wie in transdisziplinären Forschungsprojekten agiert wird, um zu wissenschaftlich fundierten und gleichzeitig anwendbaren Ergebnissen zu gelangen. Das Vorgehen der Akteure kann als pragmatische Transdisziplinarität bezeichnet werden, wie am Modell des zyklisch durchlaufenen Lernprozesses gezeigt werden kann.
description: A change of science along with the emergence of new forms of knowledge production is diagnosed in STS – Science & Technology Studies for some time. Against this background, discussions were aroused whether and how the role of science changed in ‘knowledge society’ and what implications such changes might have. Whether it is all about mere normative demands directed towards science or these changes can be found in actual research is the central point of departure for this thesis. It provides an empirical contribution from the field of environmental research to the question of how transdisciplinary research projects can attain scientifically sound and equally applicable results. The actors’ activities can be described as pragmatic transdisciplinarity, a term derived by reconstructing the model of a learning process run cyclically.
TSCFL - A new GAAs high-speed family for delay insensitive circuits using ternary logic elements
Creators: name: Kargaard Madsen, Jens
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1992
Subjects: ING-INF/01 Elettronica

description: This paper describes a Gallium Arsenide logic family called Ternary Source Coupled Fet Logic (TSCFL) that provides ternary logic elements for use in Delay Insensitive (Dl) circuits. These Dl circuits are self-timed and operate regardless of delays in wires, logic and register elements. By using ternary levels, only one wire is necessary to implement the necessary coding. The logic elements NOT, OR/AND, EXOR, and a register element have been implemented in TSCFL. A Dl FIFO ring test chip was implemented to demonstrate the potential of TSCFL for high-speed Dl circuits. Special input circuits were designed to facilitate testing, which take two high-speed binary signals and convert them, on-chip, to a high-speed ternary signal. The test circuits were implemented in the former Gigabit Logic HME/D process, and measurements show TSCFL operation up to 1.5 Gbit/s at a power dissipation of 10 mW/element. The Dl FIFO ring runs at approximately 450 Mbit/s.
The fate of estrone (E1), 17beta-estradiol (E2), estriol (E3) and 17alpha-ethinylestradiol (EE2) in surface waters
Creators: name: Brett, Tricia Korrin
Publisher: name: University of British Columbia
Year: 2014

description: Lakes and rivers receiving wastewater treatment plant effluent contain many different endocrine disrupting compounds. Previous research into the fate of these compounds has focused on laboratory experiments that investigate a single scavenging mechanism, and there has been little research on the overall loss rate constants in receiving waters. This study evaluated the fate of estrone (E1), 17β-estradiol (E2), estriol (E3) and 17α-ethinylestradiol within three different receiving waters (a river, a large lake and a small reservoir) represented by two different mathematical models (plug flow reactor and continuously stirred tank reactor) and three different hydraulic residence times (<8 hours, >50 years and about 1 year). Wastewater treatment plant effluent samples and receiving waters were analysed for the four estrogens over a one year period. E1 and E2 were the only compounds detected and there was only enough data determine the fate of E1. A receiving water loss rate constant for E1 was calculated assuming first-order reaction kinetics. E1 loss was not detectable in the river and the large lake due to a very short and very long residence time, respectively. The time-weighted E1 loss rate constant within the small reservoir was found to be 0.0106 d-¹. Data suggested that there may be a seasonal component to this loss rate that requires further investigation. The rate constant found suggests that E1 can be transported great distances within rivers.
2 exp(15) -1 pseudo random binary sequence transmitter and receiver chip
Creators: name: Johansen, Niels Thybo
name: Danielsen, Per
name: Riishoj, Jesper
name: Lassen, Peter
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1992
Subjects: ING-INF/01 Elettronica

description: This paper presents the design and test of a transmit/receive Pseudo Random Binary Sequence GaAs chip. The chip is designed using a parameterized Source Coupled FET Logic library. The chip can deliver sequences of length 27-l and 215-1 at bit-rates up to 2.2 Gbit/s.
Proteinimport in Plastiden
Creators: name: Köhler, Daniel
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2018
Subjects: subject: Proteintransport; Transitpeptid; Plastid; Plastidenbiogenese; Plastidengenom; TOC-TIC-Importapparat; 1 MDa-TIC-Komplex; Tic56; Translation; Ribosomenbiogenese
subject: protein transport; transit peptide; plastid; plastid biogenesis; plastid genome; TOC-TIC import machinery; 1 MDa-TIC-complex; Tic56; translation; biogenesis of ribosomes
subject: 572

description: Plastiden sind von zentraler Bedeutung für die pflanzliche Zelle. Der überwiegende Anteil der plastidären Proteine ist im Kern der Zelle kodiert und muss über eine doppelte Hüllmembran importiert werden. Den Hauptimportweg bilden Translokationskomplexe an der äußeren (TOC) und inneren (TIC) Hüllmembran des Plastiden. Proteine die über diesen Importapparat importiert werden sollen, verfügen zur Erkennung über ein N-terminales Transitpeptid. Im Rahmen dieser Arbeit wurden die Transitpeptide der einzelligen Alge Cyanophora paradoxa denen von Arabidopsis thaliana gegenübergestellt. Es war festzustellen, dass sich die Transitpeptide der beiden Organismen trotz der großen evolutionären Distanz überraschend ähnlich sind. Was ein Beleg ist, wie gut die grundlegenden Prinzipien des Imports konserviert sind. Des Weiteren wird im Rahmen der Arbeit demonstriert, dass ein Defekt der Importkomponente Tic56 in Arabidopsis kaum Auswirkungen auf den Proteinimport hat, der Verlust dieser Komponente jedoch zu einer gestörten Biogenese plastidärer Ribosomen führt. Dadurch konnte eine Verbindung zwischen Proteinimport und Translation aufgezeigt werden.
description: Plastids are substantial parts of plant cells. Major parts of plastid proteins are nucleus encoded and have to be imported across the two envelop membranes. The main import pathway consists of translocation complexes at the outer (TOC) and inner (TIC) envelop membrane of the plastid. Plastid proteins that need to be imported via this import apparat contain an N-terminal transit peptide. In this study transit peptides of the unicellular algae Cyanophora paradoxa are compared with those of Arabisopsis thaliana. Despite the wide evolutionary distance between both organisms their transit peptides are surprisingly similar. This is an evidence for the good conservation of the basic principles of import. Furthermore it is demonstrated that a defect of the import component Tic56 has no dramatic consequences for protein import, but that the loss of the component leads to a disturbed biogenesis of plastid ribosomes. This reveals a connection between protein import and translation.
Adjustable bandwidth GaAs monolithic transimpedance amplifier with AGC for O/E receivers up to 2.5 GBit/S
Creators: name: Hernández-Muñoz, José M.
name: González, José
name: Conesa, José Luis
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1992
Subjects: ING-INF/01 Elettronica

description: A monolithic transimpedance amplifier with adjustable bandwidth for optical links in the range 155 MBit/s to 2.5 GBit/s is presented. The circuit has been designed and fabricated utilizing commercially available 0.5um gate length GaAs MESFET process. The gain of the circuit is 85 dBOhm at 1.75 GHz bandwidth, and the Gain*Bandwidth product is near constant for other settings in the mentioned range. Besides, the amplifier includes a 45 dB AGC section, and its output is ECL compatible.
A family of high speed digital GaAs gate arrays with an application for 432 MBit/S synchronous transmission
Creators: name: Boganski, Laurent
name: Froc, Erwan
name: Fourdeux, Henri
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1992
Subjects: ING-INF/01 Elettronica

description: A GaAs gate array family is fabricated with Thomson Composants Microondes Self Aligned Gallium Arsenide process with 0.8 um Leff E/D MESFETs, 3 metal layers on 4" wafers. The complexity ranges from 3.000 to 30.000 DCFL 2 inputs NOR gates. The unloaded gate delay is 70 ps with a power of 0.3 mW. Two personnalizations of the 3K array have been designed by the Laboratoire d'Elecyronique de Rennes for an HDTV system. They consist in 11:1 serializer and 1:11 deserializer with a throughput of 432 MBit/s.
A geometrical crossover in excited states of two-electron quantum dots in a magnetic field
Creators: name: Nazmitdinov, R. G.
name: Simonovic, N. S.
name: Plastino, A. R.
name: Chizhov, A. V.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We use the entanglement measure to study the evolution of quantum correlations in two-electron axially-symmetric parabolic quantum dots under a perpendicular magnetic field. We found that the entanglement indicates on the shape transition in the density distribution of two electrons in the lowest state with zero angular momentum projection at the specific value of the applied magnetic field.
description: 8 pages, 2 figures
Test set-ups for fast measurement of monolithic integrated circuits from on-wafer to system. application to a novel GaAs monolithic  transimpedance amplifier for high speed optical communication systems
Creators: name: Dorta, P.
name: Salazar-Palma, M.
name: Casao, J.A.
name: Cáceres, J.L.
name: Perez, J.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1992
Subjects: ING-INF/01 Elettronica

description: A fast, accurate and economical method for fully characterizing MMiCs from on -wafer to system measurements is presented as well as the corresponding set-ups. The method is applied to the evaluation of a GaAs monolithic transimpedance amplifier for the receiver of a high speed optical communication system. The device was firstly DC and RF measured on-wafer and on-chip in order to test the dispersion as well as for an initial selection of the chips. Using a test-fixture designed for fast on-carrier measurements the selected chips were tested on-carrier. Finally, employing the same carrier but a different test-fixture, optical/electrical measurements were done to evaluate the subsystem behavior. The efficiency of the measurement method is demonstrated in one hand and in the other the test results show that a transimpedance amplifier of excellent performances for high speed rate optical communication systems has been obtained.
A wideband low noise GaAs hybrid optical receiver for a coherent fibre  optic   communication   system
Creators: name: Pike, S.J.
name: Hankey, J.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1992
Subjects: ING-INF/01 Elettronica

description: A low noise GaAs hybrid front-end amplifier suitable for coherent optical links is described. The microwave characterisation and modelling of a low capacitance PIN photodiode is used in the design of a high impedance (integrating) receiver. A 5 GHz bandwidth, transimpedance gain of 430Ohm  and an equivalent input noise current spectral density of 6 pA/VHz at the IF frequency of 1.2GHz is achieved.
Parallel processing in immune networks
Creators: name: Agliari, Elena
name: Barra, Adriano
name: Bartolucci, Silvia
name: Galluzzi, Andrea
name: Guerra, Francesco
name: Moauro, Francesco
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cell Behavior (q-bio.CB)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: In this work we adopt a statistical mechanics approach to investigate basic, systemic features exhibited by adaptive immune systems. The lymphocyte network made by B-cells and T-cells is modeled by a bipartite spin-glass, where, following biological prescriptions, links connecting B-cells and T-cells are sparse. Interestingly, the dilution performed on links is shown to make the system able to orchestrate parallel strategies to fight several pathogens at the same time; this multitasking capability constitutes a remarkable, key property of immune systems as multiple antigens are always present within the host. We also define the stochastic process ruling the temporal evolution of lymphocyte activity, and show its relaxation toward an equilibrium measure allowing statistical mechanics investigations. Analytical results are compared with Monte Carlo simulations and signal-to-noise outcomes showing overall excellent agreement. Finally, within our model, a rationale for the experimentally well-evidenced correlation between lymphocytosis and autoimmunity is achieved; this sheds further light on the systemic features exhibited by immune networks.
description: 21 pages, 9 figures; to appear in Phys. Rev. E
MMIC technology in Europe for millimeterwave applications
Creators: name: Dambkes, Heinrich
name: Schmidt, Lorenz-Peter
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1992
Subjects: ING-INF/01 Elettronica

description: Presently several european companies are developing GaAs based components for millimeterwave applications. State of the art for Europe today is that HEMT devices are available with fmax up to 280GHz, MMIC Schottky mixer/receiver circuits up to 94GHz, 60GHz low noise amplifiers with 10 to 12 dB gain and around 5dB noise figure are demonstrated as well as first MMIC oscillators up to 80GHz.This paper reviews the european technology programmes for the development of III-V based mm-wave components and describes the state of the art.
Ultra-short T-shaped gate fabrication technique for InP based HEMTs with high ft (> 300 GHz) and their MMIC applications
Creators: name: Shinohara, K.
name: Yamashita, Y.
name: Hikosaka, K.
name: Hirose, N.
name: Kiyokawa, M.
name: Matsui, T.
name: Mimura, T.
name: Hiyamizu, S.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2000
Subjects: ING-INF/01 Elettronica

description: A fabrication technique for sub-50-nm T-shaped-gate InGaAs/InAlAs high electron mobility transistors (HEMTs) lattice-matched to InP substrates and their device characteristics are presented. A 35-nm T-shaped-gate HEMT is successfully fabricated by optimizing conditions of electron beam (EB) lithography and reactive ion etching (RIE) to make an ultra-fine resist pattern and precisely replicate it on a SiO2 film, which defines gate length (Lg). The device exhibits an excellent current-gain cutoff frequency (fT) as high as 317 GHz with high controllability. This technique is considered to be very effective for device and MMIC applications in the V band and even higher frequency ranges.
Statistical Mechanics of Dictionary Learning
Creators: name: Sakata, Ayaka
name: Kabashima, Yoshiyuki
Publisher: name: arXiv
Year: 2012
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Information Theory (cs.IT)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Finding a basis matrix (dictionary) by which objective signals are represented sparsely is of major relevance in various scientific and technological fields. We consider a problem to learn a dictionary from a set of training signals. We employ techniques of statistical mechanics of disordered systems to evaluate the size of the training set necessary to typically succeed in the dictionary learning. The results indicate that the necessary size is much smaller than previously estimated, which theoretically supports and/or encourages the use of dictionary learning in practical situations.
description: 6 pages, 4 figures
Melothria fluminensis Gardner 1842
Creators: name: Araújo, Diogo
name: Alves, Marccus
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Cucurbitales
Cucurbitaceae
Melothria
Melothria fluminensis

description: 34. Melothria fluminensis Gardner (Fig. 2D)
Honduras, Peru, Bolivia, Brazil (Pernambuco, Bahia, Rio de Janeiro).
Selected Voucher:—Vespas, 18 June 2007, Ojima 62 (UFP).
description: Published as part of Araújo, Diogo & Alves, Marccus, 2010, Climbing plants of a fragmented area of lowland Atlantic Forest, Igarassu, Pernambuco (northeastern Brazil), pp. 1-24 in Phytotaxa 8 on pages 17-18, DOI: 10.11646/phytotaxa.8.1.1, http://zenodo.org/record/4893863
Lifting Problems and Transgression for Non-Abelian Gerbes
Creators: name: Nikolaus, Thomas
name: Waldorf, Konrad
Publisher: name: arXiv
Year: 2011
Subjects: subject: Algebraic Topology (math.AT)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 55R65 (Primary) 18G50, 22A22, 53C08, 55N05 (Secondary)

description: We discuss various lifting and reduction problems for bundles and gerbes in the context of a strict Lie 2-group. We obtain a geometrical formulation (and a new proof) for the exactness of Breen's long exact sequence in non-abelian cohomology. We use our geometrical formulation in order to define a transgression map in non-abelian cohomology. This transgression map relates the degree one non-abelian cohomology of a smooth manifold (represented by non-abelian gerbes) with the degree zero non-abelian cohomology of the free loop space (represented by principal bundles). We prove several properties for this transgression map. For instance, it reduces - in case of a Lie 2-group with a single object - to the ordinary transgression in ordinary cohomology. We describe applications of our results to string manifolds: first, we obtain a new comparison theorem for different notions of string structures. Second, our transgression map establishes a direct relation between string structures and spin structure on the loop space.
description: 33 pages. v2 contains several small improvements; the former sections 4, 5.1, and 5.2 that contained complimentary material have been deleted upon a referee's suggestion. v2 is the final and published version
Observational signatures of the giant planets collisions
Creators: name: Dokuchaev, V. I.
name: Eroshenko, Yu. N.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We consider observational signatures of the collisions and partial destructions of giant exoplanets at the chaotic stage of the planetary systems evolution. The rate of these collisions in the Galaxy is estimated to be ~0.01-1 per yr. In the inelastic collision with a small relative velocity and small impact parameter, the planets may sufficiently lose their kinetic energy and merge together. Otherwise, if the planet is experienced a shallow tangential collision, it flews safety away. At the same time, the planets loss some part of their gas envelopes during mutual collisions. Collisions of the giant planets must be accompanied also by the radiation of energy from the radio to optical bands. The optical and near UV flashes result from the collision heating of the planet surface layers. Additionally, the collision compression and collapse of the powerful magnetosphere of giant planets are possible, with a successive generation of the radio bursts. According to our estimations, the corresponding rate the radio bursts is ~0.01-1 bursts per year with the maximum spectral flux ~30mJy at the frequencies ~3GHz and with a duration of the each burst ~1.5 hours. These signals are available for registration by the existing radio telescopes.
description: 6 pages, 3 figures, preprint submitted to PSS
GAAS Microwave offset gate self-aligned MESFETs and their applications
Creators: name: Lapin, V.G.
name: Temnov, A.M.
name: Krasnik, V.A.
name: Petrov, K.I.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2000
Subjects: ING-INF/01 Elettronica

description: The present paper is devoted to microwave transistors, developed in SRPC "Istok". Design, fabrication and characteristics of power and low noise GaAs MESFET's and their applications are presented in this paper. The low noise MESFETs exhibit a noise figure of 1.2 dB at 15 GHz and power MESFET's show an output power density of 0.5 W/mm, with a typical power-added efficiency of 35% and thermal resistance of 10-12 °C/W for a MESFET with a total gate width of 4mm.
Researches of two and three-output structures with effect of resonant tunneling
Creators: name: Dorofeev, A.A.
name: Matveev, Yu.A.
name: Chernavskii, A.A.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2000
Subjects: ING-INF/01 Elettronica

description: The present paper is devoted to the development of production process of transistor structures with effect of resonant tunneling (RTT), researching static and dynamic characteristics and working frequency band of the samples and definition of possible areas of their application.
Momordica charantia L.
Creators: name: Araújo, Diogo
name: Alves, Marccus
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Cucurbitales
Cucurbitaceae
Momordica
Momordica charantia

description: 35. Momordica charantia L.
Native to Africa and widely distributed throughout the tropics (Kearns 1998).
Selected Vouchers:—Pezinho, Marques et al. 40; Piedade, Albuquerque & Rocha 410 (IPA, ULM).
description: Published as part of Araújo, Diogo & Alves, Marccus, 2010, Climbing plants of a fragmented area of lowland Atlantic Forest, Igarassu, Pernambuco (northeastern Brazil), pp. 1-24 in Phytotaxa 8 on page 18, DOI: 10.11646/phytotaxa.8.1.1, http://zenodo.org/record/4893863
Decrease of Modfet channel conductivity with increasing sheet electron concentration
Creators: name: Pozela, J.
name: Pozela, K.
name: Juciene, V.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2000
Subjects: ING-INF/01 Elettronica

description: The great decrease of electron mobility with increasing sheet electron concentration ns in modulation-doped AlGaAs/GaAs/AlGaAs quantum wells is observed. This effect is explained by increasing scattering of degenerated electrons by polar optical phonons. At ns >10 15 m -2 , the mobility decrease exceeds the increase of ns, and the channel conductivity decreases with increasing ns.
Interconnection between the picosecond stimulated recombination emission and the kinetics of dense hot electron-hole plasma in GaAs
Creators: name: Ageeva, N. N.
name: Bronevoi, I. L.
name: Krivonosov, A. N.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2000
Subjects: ING-INF/01 Elettronica

description: High-speed optoelectronic effects, caused by interconnection between the picosecond stimulated emission and the kinetic processes in dense hot electron-hole plasma in GaAs, are briefly reviewed. The newest effect of this class is reported in detail. It deals with the band gap narrowing as a result of generation of multi-component plasma in GaAs. The plasma is generated by a picosecond light pulse and the picosecond stimulated emission is observed. In this situa-tion, the total concentration of the pairs of photogenerated electrons and holes is experimentally proved to be the only parameter defining the electron distribution between Γ 6- and L6-valleys and the corresponding narrowing of the band gap. This is explained by the fact that in the presence of the emission the temperature and concentration of the charge carriers are approximately bound.
Quantum Quench in the Transverse Field Ising Chain II: Stationary State Properties
Creators: name: Calabrese, Pasquale
name: Essler, Fabian H. L.
name: Fagotti, Maurizio
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider the stationary state properties of the reduced density matrix as well as spin-spin correlation functions after a sudden quantum quench of the magnetic field in the transverse field Ising chain. We demonstrate that stationary state properties are described by a generalized Gibbs ensemble. We discuss the approach to the stationary state at late times.
description: 30 pages, 6 figures
Die Bevölkerung der Baalberger Kultur - eine anthropologisch-archäologische Analyse
Creators: name: Funke, Kirstin
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2007
Subjects: subject: Elektronische Publikation
subject: Hochschulschrift
subject: Online-Publikation
subject: Zsfassung in engl. Sprache
subject: 614.17

description: Diese Dissertation ist eine umfassende anthropologische Aufnahme aller bekannten und zur Verfügung stehenden menschlichen Skelettreste der Baalberger Kultur. Dabei wurden auch ihre archäologischen Befunde einbezogen. Die Baalberger Kultur stammt aus dem Beginn des Mittelneolithikums in Mitteldeutschland und gehört dem Trichterbecherkulturkreis an. Die archäologischen Befunde bestätigen das von der Baalberger Kultur bekannte Bild. Aus anthropologischer Sicht beinhaltet die Arbeit die erste morphologisch und metrisch nahezu vollständig aufgenommene Kulturgruppe aus diesem Zeithorizont. Neben der Erhebung von Individualdaten stellen demographische Untersuchungen wichtige Schwerpunkte dar. Ein umfassender Maßkatalog wurde genutzt, um aus Skelettfragmenten Rekonstruktionen von Langknochen durchführen zu können und somit Körperhöhen für fragmentierte Individuen zu ermitteln. Der Katalog der Arbeit ist eine Grundlage für weitere Detailarbeiten zu Pathologien, degenerativen Veränderungen und Varianten.
description: This dissertation is a comprehensive anthropologic survey of all known and available human skeletal remains of the Culture of Baalberge. The respective archaeological findings were also included. The Culture of Baalberge originates from the beginning of the Middle-Neolithic period in Central Germany and belongs to the Funnel-necked Beaker Culture. The archaeological findings confirm the known picture of the Culture of Baalberge. From an anthropologic point of view the work contains a first morphological and metrical survey of an almost complete cultural group from this era. Apart from the collection of individual data, important emphasis is put on the demographic investigation. A comprehensive catalogue of measures was used in order to reconstruct long bones out of skeleton fragments and thus be able to determine body heights from fragmented individuals. The work catalogue is a basis for further detailed work regarding pathologies, degenerative variances and variants.
FET Noise Model Extraction Methods
Creators: name: Stenarson, Jörgen
name: Wadefalk, Niklas
name: Garcia, Mikael
name: Angelov, I.
name: Zirath, Herbert
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2000
Subjects: ING-INF/01 Elettronica

description: This paper presents an overview of the noise modeling extraction methods developed at the Microwave Electronics Laboratory at Chalmers University of Technology. The presented methods are suitable for different kinds of noise models, the one and two parameter Pospieszalski model, and the three parame-ter PRC model. We also present a low power low noise amplifier.
Cryogenic MMIC low noise amplifiers
Creators: name: Weinreb, S.
name: Gaier, T.
name: Fernandez, J.E.
name: Erickson, N.
name: Wielgus, J.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2000
Subjects: ING-INF/01 Elettronica

description: Monolithic (MMIC) and discrete transistor (MIC) low noise amplifiers are compared on the basis of performance, cost, and reliability. The need for cryogenic LNA’s for future large microwave arrays for radio astronomy is briefly discussed and data is presented on a prototype LNA for the 1 to 10 GHz range along with a very wideband LNA for the 1 to 60 GHz range. A table of MMIC LNA and mixer designs under development for the frequencies up to 210 GHz is reported and data on cryogenic amplifiers in the 85 to 115 GHz is reviewed. The current status of the topics of transconductance fluctuations and cryogenic noise modeling will be briefly summarized.