cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Molekülmechanische Untersuchungen zur Struktur, Funktion und Dynamik der Hepatitis C viralen RNA-abhängigen RNA-Polymerase
Creators: name: Ludwig, Sarah
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2018
Subjects: subject: RNA-Polymerase; Hepatitis C Virus; Nicht-Strukturprotein 5B; Moleküldynamik Simulation; Hauptkomponentenanalyse
subject: RNA polymerase; hepatitis C virus; non-structural protein 5B; molecular dynamics simulation; principle component analysis
subject: 572

description: Die RNA-abhängige RNA-Polymerase des Hepatitis C steht in direktem Zusammenhang mit dem Reproduktionsprozess und Lebenszyklus des Virus. Im Rahmen dieser Arbeit sollte die Wirkungsweisen der RNA-Polymerase sowie der allosterischen Inhibitoren untersucht werden. Die Untersuchungen der primären, sekundären und tertiären Strukturmerkmale wurden mit Hilfe von RMSD-Berechnungen, Hauptkomponentenanalysen und Moleküldynamik-Simulationen durchgeführt. Die während der MD-Simulation auftretenden Proteinkonformationen dienten zur Aufklärung der Wirkungsweise der Polymerase sowie der Inhibitoren. Da es sich um ein membranständiges Protein handelt, wurde der Membrananker modelliert und dieser mit einer Kristallstruktur, sowie mit einer Durchschnittsstruktur der Moleküldynamik-Simulation zu einem vollständigem Membranprotein ergänzt. Daraus ergaben sich weitere strukturelle Einblicke in den möglichen in vitro-Zustand des Proteins. Der experimentelle Nachweis der in silico Untersuchung basiert auf Crosslinking Experimenten mit zwei Genotypen der Polymerase. Die Ergebnisse dieser Untersuchungen belegen den beobachteten Konformationswechsel der MD-Simulationen.
description: The RNA dependent RNA polymerase of the hepatitis C virus is the non-structural protein 5B (NS5B) and therefore associates with the replication process and the life cycle of the virus. This work is focused on the mode of action of the polymerase as well as of the allosteric inhibitors. Primary, secondary and tertiary structural elements were investigated by RMSD-calculations, principle component analysis or molecular dynamics simulations. The conformational changes during the molecular dynamics simulation gave information on the mode of action of the polymerase as well as of the inhibitors. Because the polymerase is a membranous protein, the membrane anchor was modeled and combined with either a crystal structure or with an average structure from the molecular dynamics simulations to build a complete model of the protein. That implied further structural information in the possible in vitro state of the protein. The experimental proof of the in silico studies were done by crosslinking experiments with two genotypes. The results of this study could indeed confirm the observed conformational change during the MD simulations.
On implicational bases of closure systems with unique critical sets
Creators: name: Adaricheva, Kira
name: Nation, J. B.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: We show that every optimum basis of a finite closure system, in D.Maier's sense, is also right-side optimum, which is a parameter of a minimum CNF representation of a Horn Boolean function. New parameters for the size of the binary part are also established. We introduce a K-basis of a general closure system, which is a refinement of the canonical basis of Duquenne and Guigues, and discuss a polynomial algorithm to obtain it. We study closure systems with the unique criticals and some of its subclasses, where the K-basis is unique. A further refinement in the form of the E-basis is possible for closure systems without D-cycles. There is a polynomial algorithm to recognize the D-relation from a K-basis. Thus, closure systems without D-cycles can be effectively recognized. While E-basis achieves an optimum in one of its parts, the optimization of the others is an NP-complete problem.
description: Presented on International Symposium of Artificial Intelligence and Mathematics (ISAIM-2012), Ft. Lauderdale, FL, USA Results are included into plenary talk on conference Universal Algebra and Lattice Theory, June 2012, Szeged, Hungary 29 pages and 2 figures
A new approximation Algorithm for the Matching Distance in Multidimensional Persistence
Creators: name: Cerri, Andrea
name: Frosini, Patrizio
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2011
Subjects: MAT/03 Geometria
INF/01 Informatica

description: Topological Persistence has proven to be a promising framework for dealing with problems concerning shape analysis and comparison. In this contexts, it was originally introduced by taking into account 1-dimensional properties of shapes, modeled by real-valued functions. More recently, Topological Persistence has been generalized to consider multidimensional properties of shapes, coded by vector-valued functions. This extension has led to introduce suitable shape descriptors, named the multidimensional persistence Betti numbers functions, and a distance to compare them, the so-called multidimensional matching distance. In this paper we propose a new computational framework to deal with the multidimensional matching distance. We start by proving some new theoretical results, and then we use them to formulate an algorithm for computing such a distance up to an arbitrary threshold error.
A new mesh reduction technology for the method of moments modelling of planar RF and microwave interconnects
Creators: name: Sercu, Jeannick
name: Knockaert, Luc
name: De Zutter, Daniel
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2001
Subjects: ING-INF/01 Elettronica

description: This paper describes a new mesh reduction technology that significantly increases the electromagnetic modelling efficiency of planar RF and Microwave interconnect structures. This technology reduces the redundancy in the method of moments equations due to the geometrical complexity of the structure. It comprises a generalization of the basis functions used in the discretization of the surface currents. The generalized basis functions allow for a more efficient meshing of complex geometrical structures in terms of polygonal shaped cells. The increased simulation performance is demonstrated for a complex microwave package interconnection structure.
HREM-Bildanalyse von III-V-Halbleiter-Schichtstrukturen durch quantitativen Bildvergleich Experiment - Simulation
Creators: name: Kirschner, Holger
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2000
Subjects: Elektronische Publikation

description: This work describes a new method of composition and thickness determination in high resolution electron microscopic samples by quantitative image processing. The method performs a lateral resolution of 5.9 Angstroems. In this work only III-V semiconductors (sphalerite structure) are investigated though the used methods can be generalized easily to other material systems. One of the dominant source of error in the quantitative high resolution electronmicroscopy is surface amorphisation during sample preparation. Such surface amorphization was simulated in a semianalytical model. By comparison with HREM images the influence of surface amorphization is investigated. The use of neural networks for this application was motivated by function approximation theory als well as through comparison with classical methods. By application of this method to HREM images of AlGaAs heterostructures random alloy fluctuations in the ternary semiconductor were quantitatively shown and compared to a theoretical model. Determination of crystalline sample thickness shows thickness variations due to sample preparaton.
Correlation between the reliability of HEMT devices and that of a combined oscillator-amplifier
Creators: name: Schreurs, D.
name: De Raedt, W.
name: Vandersmissen, R.
name: Neuhaus, B.
name: Beyer, A.
name: Nauwelaers, B.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2001
Subjects: ING-INF/01 Elettronica

description: We evaluate an oscillator-amplifier MMIC submitted to high-temperature operating life time tests. To relate adequately these results with individual components’ results, it is important to realise that failure mechanisms in non-linear MMICs are governed by the maximally instantaneous voltages/currents and hence that comparisons should be conducted at equal instantaneous conditions.
Falling chains as variable mass systems: theoretical model and experimental analysis
Creators: name: de Sousa, Célia A.
name: Gordo, Paulo M.
name: Costa, Pedro
Publisher: name: arXiv
Year: 2011
Subjects: subject: Physics Education (physics.ed-ph)
subject: FOS: Physical sciences

description: In the present paper we revisit, theoretical and experimentally, the fall of a folded U-chain and of a pile-chain. The model calculation implies the division of the whole system into two subsystems of variable mass, allowing to explore the role of tensional contact forces at the boundary of the subsystems. This justifies, for instance, that the folded U-chain falls faster than the acceleration due to the gravitational force. This result, which matches quite well with the experimental data independently of the type of chain, implies that the falling chain is well described by energy conservation. We verify that these conclusions are not observed for the pile-chain motion.
High frequency properties of Si/SiGe n-MODFETs: dependence on gate length and temparture
Creators: name: Enciso, M.
name: Aniel, F.
name: Giguerre, L.
name: Crozat, P.
name: Adde, R.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2001
Subjects: ING-INF/01 Elettronica

description: The HF performances of n-type strained Si channel Modulation Doped Field Effect Transistors (MODFETs) with 0.118 µm, 0.130 µm and 0.250 µm gate lengths are reported at 300 K and 50 K. At 300K, intrinsic cut-off frequencies fTi are 65 GHz, 58 GHz, 37 GHz and maximum oscillation frequencies fMAX are 76 GHz ,60 GHz, and 100 GHz , respectively. The 0.130 µm device presents at 300 K a record intrinsic transconductance of 715 mS/mm and excellent noise performances with a de-embedded Minimum Noise Figure NFmin of 0.3 dB at 2.5 GHz. The variation of fMAX underlines the importance of the device parasitic resistances.
Fully physical electro-thermal CAD for Power FET optimisation by Non Uniform Finger Spacing
Creators: name: Panks, A. J.
name: Batty, W.
name: David, S.
name: Johnson, R. G.
name: Snowden, C. M.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2001
Subjects: ING-INF/01 Elettronica

description: A fully physical electro-thermal model is described. I combines he fast, quasi-2-dimensional Leeds Physical Model of MESFETs and HEMTs, with the compact Leeds thermal impedance ma rix model of time-dependent heat ﬂow in complex 3-dimensional systems.The coupled electro-thermal model is applied o the design optimisation of multigate power FETs. In particular,he possibility of reducing emperature variation between gate ﬁngers by non uniform spacing is examined. The implications for improved efficiency, and for possible reduction of thermal intermodulation distortion and improvement of reliability are discussed. The model is validated experimentally by comparison of simulated results agains infrared thermal images of power FETs.
Stories of loss and change : six mothers’ experiences of parenting an adult child with a mental illness
Creators: name: Wiens, Sandra Ellen
Publisher: name: University of British Columbia
Year: 2013

description: A qualitative narrative research method was used to explore and describe the experiences of personal growth and change of six mothers of adult children with schizophrenia or schizoaffective disorder who volunteered to participate in this study. A total of twenty-eight semi-structured interviews (average four per participant), were conducted over a period of two years. The research question was: How do parents of adult children with schizophrenia or schizoaffective disorder experience personal growth and change as they live with the challenges and uncertainties associated with their child's mental illness? Individual, co-constructed first person narratives of each participant's mothering experiences were written following an in-depth, holistic-content analysis of the interview data. A cross-narrative analysis was also conducted which resulted in four common themes (Enduring sadness and loss, Distress and struggle, Commitment to helping/action, Personal and relational change); four significant threads (What will happen when I am no longer able to care for my child?, Impact on siblings who are well, Fluctuations in hope, Regret/Guilt); and four broader dimensions (New normal mothering, Changes in mothering over time, Involvement in the mental health system, Adaptation and engagement with life in new and meaningful ways). These findings were found to be best understood through the conceptual lens of nonfinite loss – reflecting the ongoing challenges and lifetime implications of this mothering experience. Implications for theory, research and counselling psychology practice are addressed, based on these findings.
Untersuchungen zum Einfluss von Antithymozytenglobulinen auf die in vivo-Rekonstitution regulatorischer T-Zellen und des allgemeinen zellulären Immunstatus nach allogener hämatopoetischer Stammzelltransplantation
Creators: name: Reisberg, André
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2010
Subjects: subject: Online-Publikation
subject: Hochschulschrift
subject: 611

description: Antithymozytenglobuline (ATG) werden während der Konditionierungstherapie vor allogener Stammzelltransplantation (ASZT) zur Prävention einer Graft-versus-Host-Erkrankung (GvH) eingesetzt. Die Depletion von T-Zellen wird dabei als Hauptmechanismus angesehen. Regulatorische T-Zellen (Treg) können eine GvHD reduzieren. Kürzlich konnte in vitro gezeigt werden, dass ATGs in der Lage sind, Treg zu induzieren. Bisher ist jedoch nicht bekannt, ob dieser Effekt in vivo im Menschen ebenfalls existiert. In vorliegender Arbeit wurde die Immunrekonstitution nach ASZT bei Patienten nach ATG bzw. ohne ATG-Gabe analysiert. Periphere Immunzellen wurden vor und nach ASZT zu festgelegten Zeitpunkten analysiert. Die Zellanalysen konzentrierten sich auf Treg mit unterschiedlichem Immunphänotyp. Es konnte gezeigt werden, dass die Treg-Ratio nach ATG deutlich und stabil erhöht war. Bei vollständigem Spenderchimärismus aller Patienten schlussfolgerten wir, dass diese Treg aus dem Transplantat stammten. Die vorliegende Pilotstudie liefert somit erste Hinweise dafür, dass eine Anreicherung von Tregs einen neuen, relevanten in vivo-Mechanismus der Immunregulation durch ATGs darstellen könnte.
Ice nucleation by mineral dusts, fungal spores, and bacteria : implications for climate and the long-distance transport of these aerosols in the atmosphere
Creators: name: Haga, Donna
Publisher: name: University of British Columbia
Year: 2013

description: In the atmosphere, ice can form on solid aerosol particles called ice nuclei. This research focuses on the ice nucleation properties of mineral dusts and biological particles. The motivation for this research is two-fold. First, ice nucleation on these aerosols may influence cloud formation, cloud reflectivity and precipitation patterns in what is an indirect climate effect. This effect is one of the largest uncertainties in current climate models. Second, ice nucleation may be an important removal mechanism for these particles from the atmosphere and may influence their long-distance transport. Currently, ice nucleation is represented in a simplistic manner or not at all in models used to predict the long-distance transport of aerosols. A temperature and humidity controlled flow cell coupled to an optical microscope was used to study the ice nucleation properties of four mineral dusts, eighteen fungal spores, and six bacteria. It was found that acidic coatings reduce the ice nucleating ability of the mineral dusts. The fungal spores showed a wide range of ice nucleating properties and there was no inherent difference in the ice nucleation ability of spores belonging to different taxonomic groups. Four of the bacteria studied were very poor ice nuclei and the fifth bacterium was an excellent ice nucleus. The results from the flow cell experiments on fungal spores were used to describe ice nucleation in two modeling studies that simulated atmospheric transport. One study found that a significant fraction of large fungal spores (20 micrometers in diameter) can reach high altitudes where they could act as ice nuclei. The other study focused on smaller spores (3 to 8 micrometers) and found that ice nucleation on these spores effects their long-distance transport to polar and marine regions. The laboratory results were used to show that mineral dusts are more important than the fungal spores or bacteria that were studied on a global annual scale. These results can be used to improve parameterizations of ice nucleation on mineral dusts and biological particles in future modeling studies investigating the indirect effect of aerosols on climate or the long-distance transport of aerosols in the atmosphere.
An efficiency upper bound for inverse covariance estimation
Creators: name: Eldan, Ronen
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistics Theory (math.ST)
subject: Probability (math.PR)
subject: FOS: Mathematics

description: We derive an upper bound for the efficiency of estimating entries in the inverse covariance matrix of a high dimensional distribution. We show that in order to approximate an off-diagonal entry of the density matrix of a $d$-dimensional Gaussian random vector, one needs at least a number of samples proportional to $d$. Furthermore, we show that with $n \ll d$ samples, the hypothesis that two given coordinates are fully correlated, when all other coordinates are conditioned to be zero, cannot be told apart from the hypothesis that the two are uncorrelated.
description: 7 Pages
The Entropic Discriminant
Creators: name: Sanyal, Raman
name: Sturmfels, Bernd
name: Vinzant, Cynthia
Publisher: name: arXiv
Year: 2011
Subjects: subject: Algebraic Geometry (math.AG)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: The entropic discriminant is a non-negative polynomial associated to a matrix. It arises in contexts ranging from statistics and linear programming to singularity theory and algebraic geometry. It describes the complex branch locus of the polar map of a real hyperplane arrangement, and it vanishes when the equations defining the analytic center of a linear program have a complex double root. We study the geometry of the entropic discriminant, and we express its degree in terms of the characteristic polynomial of the underlying matroid. Singularities of reciprocal linear spaces play a key role. In the corank-one case, the entropic discriminant admits a sum of squares representation derived from the discriminant of a characteristic polynomial of a symmetric matrix.
description: 24 pages, minor revisions
Additional file 1 of BiCyCLE NMES—neuromuscular electrical stimulation in the perioperative treatment of sarcopenia and myosteatosis in advanced rectal cancer patients: design and methodology of a phase II randomised controlled trial
Creators: name: Pring, Edward T.
name: Gould, Laura E.
name: Malietzis, George
name: Lung, Philip
name: Bharal, Mina
name: Fadodun, Tutu
name: Bassett, Paul
name: Naghibi, Mani
name: Taylor, Claire
name: Drami, Ioanna
name: Chauhan, Deeptika
name: Street, Tamsyn
name: Francis, Nader K.
name: Athanasiou, Thanos
name: Saxton, John M.
name: Jenkins, John T.
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Cell Biology
subject: Physiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer

description: Additional file 1.
On wafer thermal investigation of gaas-based microwave transistors by a thermoelectric system
Creators: name: Sannino, M.
name: Caddemi, A.
name: Donato, N.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2001
Subjects: ING-INF/01 Elettronica

description: On wafer thermal analysis is of basic importance to assess key aspects of the performance and the reliability of microwave devices and circuits in a critical operation environment. To this aim, we have designed and realized an efficient Peltier-stage thermal chuck for on wafer microwave probe stations working over the 220 K – 320 K temperature range. Extensive testing has enlightened its features in terms of fast settling time and accurate temperature control. The performance of the system has been exploited in measurement of I-V curves, scattering parameters and noise figure up to 40 GHz of several microwave devices. We here describe the details of the measurement system and present the results of our most recent experimental activity.
On Bianchi's Backlund transformation of quadrics
Creators: name: Dinca, Ion
Publisher: name: arXiv
Year: 2011
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: We investigate basic features of Bianchi's Bäcklund transformation of quadrics to see if it can be obtained under weaker assumptions and if it can be generalized to deformations of other surfaces.
Self-consistent fully dynamic electro-thermal simulation of power HBTS
Creators: name: Cappelluti, F.
name: Bonani, F.
name: Donati Guerrieri, S.
name: Ghione, G.
name: Naldi, C. U.
name: Peroni, M.
name: Cetronio, A.
name: Graffitti, R.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2001
Subjects: ING-INF/01 Elettronica

description: A new self-consistent dynamic electro-thermal model for power HBTs is presented coupling a circuit-oriented electricalmodel, fitted on experimental data, with a full frequency domain thermal model. The thermal model provides the exact frequency behaviour of the device thermal impedance through a quasi-3D approach. The electro-thermal self-consistent solution is achieved, in large-signal periodic operation, through Harmonic Balance analysis. The model has been applied to the simulation of some HBT layouts from Alenia Marconi Systems.
Constraining the Bulk Lorentz Factor of GRB Outflow in the Magnetic-dominated Jet Model
Creators: name: Chang, Zhe
name: Lin, Hai-Nan
name: Jiang, Yunguo
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Recent observations by the Fermi-LAT showed that there are delayed arrivals of GeV photons relative to the onset of MeV photons in some GRBs. In order to avoid a large optical depth, the minimal value of the Lorentz factor has been estimated to be higher than 1000 in some brightest bursts. In this paper, we present a detailed calculation of the time delay between the MeV and GeV photons in the framework of the magnetic-dominated jet model. We find that the time delay strongly depends on the saturated bulk Lorentz factor of the jet. Inspired by this fact, we use this model to calculate the Lorentz factors of the four brightest Fermi bursts. The results indicate that the Lorentz factors are much smaller than that obtained from the "single-zone" scenario. The short GRB 090510 has a minimal Lorentz factor 385, while the three long bursts GRB 080916c, GRB090902b and GRB 090926 have almost the same Lorentz factors, with an average value near 260. Another interesting result is that, for long bursts, GeV photons are emitted after the bulk Lorentz factor saturates. For the short GRB, however, MeV and GeV photons are emitted at the same phase, i.e., either at the expansion phase or at the coast phase.
description: 18 pages, 2 figures
Additional file 2 of BiCyCLE NMES—neuromuscular electrical stimulation in the perioperative treatment of sarcopenia and myosteatosis in advanced rectal cancer patients: design and methodology of a phase II randomised controlled trial
Creators: name: Pring, Edward T.
name: Gould, Laura E.
name: Malietzis, George
name: Lung, Philip
name: Bharal, Mina
name: Fadodun, Tutu
name: Bassett, Paul
name: Naghibi, Mani
name: Taylor, Claire
name: Drami, Ioanna
name: Chauhan, Deeptika
name: Street, Tamsyn
name: Francis, Nader K.
name: Athanasiou, Thanos
name: Saxton, John M.
name: Jenkins, John T.
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Cell Biology
subject: Physiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer

description: Additional file 2.
Additional file 2: of Iron deficiency diagnosed using hepcidin on critical care discharge is an independent risk factor for death and poor quality of life at one year: an observational prospective study on 1161 patients
Creators: name: Lasocki, Sigismond
name: Lefebvre, Thibaud
name: Mayeur, Claire
name: Puy, HervĂŠ
name: Mebazaa, Alexandre
name: Gayat, Etienne
Publisher: name: figshare
Year: 2018
Subjects: Medicine
Biotechnology
Environmental Sciences not elsewhere classified
Biological Sciences not elsewhere classified
Mathematical Sciences not elsewhere classified
Science Policy
Virology

description: Table S1. Result of the multivariate model for the prediction of one-year post-ICU mortality according to the different ID definitions. All the variables retained in the final model of the princeps publication were added to this model [18]. OR, odds ratio; CI, confidence interval; ID, iron deficiency. (DOCX 19 kb)
Electro-Thermal modelling of very High power Microwave bipolar Junction transistors
Creators: name: Fagan, Christopher J.
name: Snowden, Christopher M.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2001
Subjects: ING-INF/01 Elettronica

description: This paper describes a new approach to accurately characterise very high power, Si BJT, devices capable of delivering powers in excess of 250W, at L band, in a class C amplifier configuration. Conventional modelling approaches are not suitable for large power structures. An alternative electro-thermal, equivalent circuit model, has been constructed using a novel hierarchical approach. The thermal dependence of the device characterisation is removed during the extraction of the electrical circuit and is reinserted, within the model, using a suitably complex thermal network, determined using a fully physical thermal simulator. Theoretical and experimental results are shown for steady state and pulsed amplifier operation.
A Prototype Detector for Directional Measurement of the Cosmogenic Neutron Flux
Creators: name: Lopez, J.
name: Terao, K.
name: Conrad, J. M.
name: Dujmic, D.
name: Winslow, L.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: This paper describes a novel directional neutron detector prototype. The low pressure time projection chamber uses a mix of helium and CF4 gases. The detector reconstructs the energy and angular distribution of fast neutron recoils. This paper reports results of energy calibration using an alpha source and angular reconstruction studies using a collimated neutron source. The best performance is obtained with a 12.5% CF4 gas mixture. At low energies the target for fast neutrons transitions is primarily helium, while at higher energies, the fluorine contributes as a target. The reconstruction efficiency is both energy and target dependent. For neutrons with energies less than 20 MeV, the reconstruction efficiency is ~40% for fluorine recoils and ~60% for helium recoils.
description: final version
Steady base states for non-Newtonian granular hydrodynamics
Creators: name: Reyes, F. Vega
name: Santos, A.
name: Garzó, V.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study in this work steady laminar flows in a low density granular gas modelled as a system of identical smooth hard spheres that collide inelastically. The system is excited by shear and temperature sources at the boundaries, which consist of two infinite parallel walls. Thus, the geometry of the system is the same that yields the planar Fourier and Couette flows in standard gases. We show that it is possible to describe the steady granular flows in this system, even at large inelasticities, by means of a (non-Newtonian) hydrodynamic approach. All five types of Couette-Fourier granular flows are systematically described, identifying the different types of hydrodynamic profiles. Excellent agreement is found between our classification of flows and simulation results. Also, we obtain the corresponding non-linear transport coefficients by following three independent and complementary methods: (1) an analytical solution obtained from Grad's 13-moment method applied to the inelastic Boltzmann equation, (2) a numerical solution of the inelastic Boltzmann equation obtained by means of the direct simulation Monte Carlo method and (3) event-driven molecular dynamics simulations. We find that, while Grad's theory does not describe quantitatively well all transport coefficients, the three procedures yield the same general classification of planar Couette-Fourier flows for the granular gas
description: 33 pages, 11 figures; v2: improved version accepted for publication in J. Fluid Mech
Spice Thermal Subcircuit of Multifinger HBT derived from Ritz Vector reduction technique of 3D Thermal Simulation for electrothermal modeling
Creators: name: Lopez, D.
name: Sommet, R.
name: Quéré, R.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2001
Subjects: ING-INF/01 Elettronica

description: This paper deals with the integration of a reduced thermal model based on tree dimensional Finite Element (FE) thermal simulation into circuit simulator for accurate prediction of electrothermal behavior of power devices. The reduced thermal model based on the Ritz vectors approach is easily usable in any kind of circuit simulator because it is described by a spice format subcircuit. The model has been successfully experimented with the ADS simulator. Electrical based thermal measurements of transient temperature response have successfully validated our approach.
Blind Reconciliation
Creators: name: Martinez-Mateo, Jesus
name: Elkouss, David
name: Martin, Vicente
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: Information Theory (cs.IT)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Information reconciliation is a crucial procedure in the classical post-processing of quantum key distribution (QKD). Poor reconciliation efficiency, revealing more information than strictly needed, may compromise the maximum attainable distance, while poor performance of the algorithm limits the practical throughput in a QKD device. Historically, reconciliation has been mainly done using close to minimal information disclosure but heavily interactive procedures, like Cascade, or using less efficient but also less interactive -just one message is exchanged- procedures, like the ones based in low-density parity-check (LDPC) codes. The price to pay in the LDPC case is that good efficiency is only attained for very long codes and in a very narrow range centered around the quantum bit error rate (QBER) that the code was designed to reconcile, thus forcing to have several codes if a broad range of QBER needs to be catered for. Real world implementations of these methods are thus very demanding, either on computational or communication resources or both, to the extent that the last generation of GHz clocked QKD systems are finding a bottleneck in the classical part. In order to produce compact, high performance and reliable QKD systems it would be highly desirable to remove these problems. Here we analyse the use of short-length LDPC codes in the information reconciliation context using a low interactivity, blind, protocol that avoids an a priori error rate estimation. We demonstrate that 2x10^3 bits length LDPC codes are suitable for blind reconciliation. Such codes are of high interest in practice, since they can be used for hardware implementations with very high throughput.
description: 22 pages, 8 figures
A monolithic 5.8 GHZ power amplifier in a 25 GHZ FT Silicon Bipolar technology
Creators: name: Simbürger, W.
name: Bakalski, W.
name: Kehrer, D.
name: Wohlmuth, H.D.
name: Rest, M.
name: Aufinger, K.
name: Boguth, S.
name: Scholtz, A. L.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2001
Subjects: ING-INF/01 Elettronica

description: A monolithic integrated radio-frequency power amplifier for the 5.8 GHz band has been realized in a 25 GHz-fT Si-bipolar production technology (B6HF). The 2-stage push-pull type power amplifier uses a planar on-chip transformer as input-balun and for interstage matching. A high-current cascode stage is used for the driver and for the output stage. At 2.7 V, 3.6 V, and 5 V supply voltage a maximum output power of 21.9 dBm, 24 dBm and 26 dBm at 5.8 GHz is achieved. The small-signal gain is 20 dB.
Distorted Kagome Lattice Generated by a Unique Orbital Arrangement in the Copper Mineral KCu3As2O7(OH)3
Creators: name: Okamoto, Yoshihiko
name: Ishikawa, Hajime
name: Nilsen, Gøran J.
name: Hiroi, Zenji
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We study polycrystalline samples of KCu3As2O7(OH)3, a new candidate spin-1/2 kagome antiferromagnet, by magnetic susceptibility and heat capacity measurements above 2 K. The unique arrangement of the 3z2 - r2 and x2 - y2 orbitals on the Cu2+ kagome net is noted and compared to the orbital patterns found in other kagome minerals. It is suggested that this orbital arrangement gives rise to one antiferromagnetic and two ferromagnetic interactions on isosceles triangles forming a highly distorted kagome lattice. KCu3As2O7(OH)3 is found to show an antiferromagnetic long-range order at T_N = 7.2 K. Remarkably, a spin entropy is more gradually released upon cooling below T_N compared with a conventional magnetic long-range order, which may originate from the geometrical frustration still present in this highly distorted kagome lattice.
description: 5 pages, 4 figures
Additional file 3 of BiCyCLE NMES—neuromuscular electrical stimulation in the perioperative treatment of sarcopenia and myosteatosis in advanced rectal cancer patients: design and methodology of a phase II randomised controlled trial
Creators: name: Pring, Edward T.
name: Gould, Laura E.
name: Malietzis, George
name: Lung, Philip
name: Bharal, Mina
name: Fadodun, Tutu
name: Bassett, Paul
name: Naghibi, Mani
name: Taylor, Claire
name: Drami, Ioanna
name: Chauhan, Deeptika
name: Street, Tamsyn
name: Francis, Nader K.
name: Athanasiou, Thanos
name: Saxton, John M.
name: Jenkins, John T.
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Cell Biology
subject: Physiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer

description: Additional file 3.
Positivity in the presence of initial system-environment correlation
Creators: name: Modi, Kavan
name: Rodríguez-Rosario, César A.
name: Aspuru-Guzik, Alán
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The constraints imposed by the initial system-environment correlation can lead to nonpositive Dynamical maps. We find the conditions for positivity and complete positivity of such dynamical maps by using the concept of an assignment map. Any initial system-environment correlations make the assignment map nonpositive, while the positivity of the dynamical map depends on the interplay between the assignment map and the system-environment coupling. We show how this interplay can reveal or hide the nonpositivity of the assignment map. We discuss the role of this interplay in Markovian models.
description: close to the published version. 5 pages, 1 figure
Abbau von Speichertriglyzeriden in keimenden Samen der Gurke (Cucumis sativus)
Creators: name: Balkenhohl, Thomas
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2000
Subjects: Elektronische Publikation
Hochschulschrift
Zsfassung in engl. Sprache

description: Speicherlipide (Triacylglyzeride) ölhaltiger Samen werden in den Lipidkörpern gelagert. Die Speicherlipide der Gurkenkeimblätter werden im Verlauf der Keimung zunehmend durch eine Lipoxygenase (LOX) oxygeniert, welche an der Lipidkörpermembran lokalisiert ist. In dieser Arbeit konnten fünf verschiedene Produkte einer LOX isoliert werden, die spezifisch Linolsäure zu (13S)-Hydroperoxyoctadecadiensäure ((13S)-HPODE) oxygeniert. Bei diesen fünf Verbindungen handelte es sich überwiegend um LOX-Produkte des Trilinoleins. Weiterhin konnte an der Lipidkörpermembran der Gurke eine Lipase-Aktivität nachgewiesen werden, die selektiv die Freisetzung des LOX-Produktes (13S)-H(P)ODE aus den Speicherlipiden katalysiert. Die Anreicherung dieser Aktivität führte zu der Isolierung eines Proteins mit einem Molekulargewicht von 110 kDa. Die Charakterisierung dieses Enzyms ergab ein alkalisches pH-Optimum von pH 8,5 und zeigte, dass sich die katalytische Aktivtät nicht auf LOX-Produkte in den Speicherlipiden beschränkt, sondern sich auf oxygenierte Fettsäuren in den Triacylglyzeriden verallgemeinern lässt. Es konnte festgestellt werden, dass die Aktivität unabhängig davon war, ob die veresterte Fettsäure ein Hydroxy-, Hydroperoxy- oder Epoxygruppe enthielt. An der Lipidkörpermembran anderer Ölsaaten konnte ebenfalls eine hydrolytischeAktivtät nachgewiesen werden, die bevorzugt oxygenierte Fettsäuren aus den Speicherlipiden freisetzte.
description: Storage lipids (triacylglycerols) of oil seeds are stored in lipid bodies. The storage lipids of cucumber cotyledons are oxygenated during the time course of germination by a lipoxygenase (LOX), which is localized at the lipid body membrane. In this work five different products of a LOX could be isolated, which specifically oxygenates linoleic acid to (13S)-hydroperoxyoctadecadienoicacid ((13S)-HPODE). These substances are predominantly reaction products of a LOX with trilinolein. Furthermore a lipase activity at the lipid body membrane could be detected which selectively catalyses the release of (13S)-H(P)ODE from the storage lipids. The enrichment of the activity led to the purification of a protein with a molecular weight of 110 kDa. The characterization of the enzyme showed an alkaline pH-optimum of pH 8,5. Additionally it could be shown that the activity of the enzyme is not restricted to LOX-products, rather than to oxygenated fatty acids in the triacylglycerols. The activity of the enzyme is independent of the fact if the esterified fatty acid contains a hydroperoxy-, hydroxy- or an epoxy group. Other oil seeds contain also a hydrolytic activity at the lipid body membrane which predominantly releases oxygenated fatty acids from the storage lipids.
title: Micro CT of cremains from late bronze age period from Croatia
Creators: name: Sjekavica, Ivica
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Forensic / Necropsy studies
subject: Musculoskeletal bone
subject: CT
subject: Image manipulation / Reconstruction
subject: Medico-legal issues
subject: Forensics

description: Aims and objectives Methods and materials Results Conclusion Personal information References
description: Aims and objectives: The purpose was to present micro CT morphological images and postprocessing results from further studies of dental cremated remains (cremains) from Late Bronze Age from...
Additional file 1 of PRISMA extension for moxibustion 2020: recommendations, explanation, and elaboration
Creators: name: Zhang, Xuan
name: Tan, Ran
name: Lam, Wai Ching
name: Cheng, Chung Wah
name: Yao, Liang
name: Wang, Xiao-Qin
name: Li, Si-Yao
name: Aixinjueluo, Qi-Ying
name: Yang, Ke-Hu
name: Shang, Hong-Cai
name: Wu, Tai-Xiang
name: Lyu, Ai-Ping
name: Bian, Zhao-Xiang
Publisher: name: figshare
Year: 2020
Subjects: Medicine
Biological Sciences not elsewhere classified
Developmental Biology
Science Policy

description: Additional file 1. S1. Search strategy and flow chart of the literature review. S2. Available published examples of reporting moxibustion SRs.
EXPLORING TILTED COSMOLOGICAL SCENARIOS: BIANCHI TYPE I MODELS WITH PERFECT FLUID IN GENERAL RELATIVITY
Creators: name: Rajesh, K. Sharma
name: Anjali, M. Gupta
Publisher: name: AMERICAN SERIAL
Year: 2024
Subjects: Tilted universes
cosmological dynamics\
Bianchi Type I models
cosmic evolution
cosmic structure

description: The exploration of spatially homogeneous and anisotropic universes, particularly those exhibiting tilt, has garnered significant interest in recent years. Tilted universes, where matter does not move orthogonally to the hypersurface of homogeneity, offer a nuanced understanding of cosmic dynamics. Early seminal works by King and Ellis (1973), Ellis and King (1974), and Collins and Ellis (1979) extensively examined the general dynamics of tilted universes. Dunn and Tupper (1978) and Lorenz (1981) specifically delved into Tilted Bianchi Type I models, while Mukherjee (1983) investigated these universes with heat flux, revealing intriguing pancake-shaped configurations. Bradley (1988) contributed by deriving tilted spherically symmetric self-similar dust models, adding to the complexity of equations governing tilted cosmological scenarios.

The mathematical formalism governing tilted cosmological models is notably intricate compared to non-tilted ones, as highlighted by Ellis and Baldwin (1984), who proposed the potential presence of tilt in our universe and suggested detection methods. Further advancements include the exploration of tilted cold dark matter cosmological scenarios by Cen et al. (1992), shedding light on the implications of tilt in cosmological dynamics. Additionally, Bali and Sharma (2002) delved into the characteristics of tilted Bianchi Type I dust fluid, revealing peculiar cigar-type singularities under certain conditions.

This abstract encapsulates the evolving landscape of tilted universes, emphasizing the significance of tilt in shaping cosmic evolution and structure. Through a historical overview and examination of key findings, it underscores the importance of understanding tilted cosmological models in elucidating fundamental aspects of the universe's evolution and structure.
Libri rari e di pregio nella biblioteca del Dipartimento di Scienze Statistiche "Paolo Fortunati"
Creators: name: Betti, Gianpiero
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2005
Subjects: SECS-S/01 Statistica

description: The stock of the Ancient Books Section in the Department of Statistics “Paolo Fortunati” of Bologna University include 19 volumes of the seventeenth century, 48 of the eighteenth century, 152 of the nineteenth century and 4 volumes of the twentieth century, making a total of 223 books.
Among the books of the seventeenth century are those of Jean-Baptiste Colbert, Finance Minister of Louis XIV, works of Francis Bacon, English philosopher and politician and the fundamental work of the English School of Political Arithmetick of 1662 attributed to John Graunt. Amongst prominent authors of the eighteenth century are Thomas Robert Malthus, Joseph-Louis Lagrange and Pierre Simon Laplace.
Nineteenth century works of Melchiorre Gioja, Gian Domenico Romagnosi, Adolphe Quetelet who unified the four historical currents of Statistics, and of Karl Pearson, one of the founders of contemporary Statistics are kept in the Archive.
The twentieth century admirable work of Giovan Battista Salvioni on the value of the Bologna currency from 1551 to 1604 should also be mentioned.
Experimentally Engineering the Edge Termination of Graphene Nanoribbons
Creators: name: Zhang, Xiaowei
name: Yazyev, Oleg V.
name: Feng, Juanjuan
name: Xie, Liming
name: Tao, Chenggang
name: Chen, Yen-Chia
name: Jiao, Liying
name: Pedramrazi, Zahra
name: Zettl, Alex
name: Louie, Steven G.
name: Dai, Hongjie
name: Crommie, Michael F.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The edges of graphene nanoribbons (GNRs) have attracted much interest due to their potentially strong influence on GNR electronic and magnetic properties. Here we report the ability to engineer the microscopic edge termination of high quality GNRs via hydrogen plasma etching. Using a combination of high-resolution scanning tunneling microscopy and first-principles calculations, we have determined the exact atomic structure of plasma-etched GNR edges and established the chemical nature of terminating functional groups for zigzag, armchair and chiral edge orientations. We find that the edges of hydrogen-plasma-etched GNRs are generally flat, free of structural reconstructions and are terminated by hydrogen atoms with no rehybridization of the outermost carbon edge atoms. Both zigzag and chiral edges show the presence of edge states.
description: 16+9 pages, 3+4 figures
Il turismo in Emilia-Romagna: una sintesi delle recenti tendenze
Creators: name: Filippini, Romina
name: Di Terlizzi, Carmela
name: Cazzola, Alberto
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2005
Subjects: SECS-S/05 Statistica sociale

description: The article contains a broad description of the tourist trend in the Emilia-Romagna region during the years 2001-2003. 
Official Istat data are used to place the regional tourism in the national outline, while data from provincial and regional administration are handled to find the specific characteristics of the phenomenon in the region.
The analysis is based on structural indicators (hotels and complementary structures capacity) and flux indicators (arrivals, presences and mean time of stay) with particular reference to guest’s nationality.
National and international tourist fluxes are analysed considering the kind of structure used, the kind of tourist resort, destinations and seasonality.