cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A formal proof of the optimal frame setting for Dynamic-Frame Aloha with known population size
Creators: name: Barletta, Luca
name: Borgonovo, Flaminio
name: Cesana, Matteo
Publisher: name: arXiv
Year: 2012
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: In Dynamic-Frame Aloha subsequent frame lengths must be optimally chosen to maximize throughput. When the initial population size ${\cal N}$ is known, numerical evaluations show that the maximum efficiency is achieved by setting the frame length equal to the backlog size at each subsequent frame; however, at best of our knowledge, a formal proof of this result is still missing, and is provided here. As byproduct, we also prove that the asymptotical efficiency in the optimal case is $e^{-1}$, provide upper and lower bounds for the length of the entire transmission period and show that its asymptotical behaviour is $\sim ne-ζ\ln (n)$, with $ζ=0.5/\ln(1-e^{-1})$.
description: 22 pages, submitted to IEEE Trans. on Information Theory
Atomistic understanding of the anisotropic tensile response and zero-stiffness of carbon honeycomb nanostructure
Creators: name: Li, Jiaqi
name: Bai, Lichun
name: He, Wei
name: Liu, Bo
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biophysics
subject: Physical Sciences not elsewhere classified
subject: Cell Biology
subject: Molecular Biology
subject: Biotechnology
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Computational Biology

description: Carbon honeycomb (CHC) is a novel carbon allotrope with excellent mechanical and physical properties and has great potentials for various energy and environmental applications. In this work, the tensile response of the CHC nanostructure is re-examined via molecular dynamics simulation to provide an atomistic understanding of its anisotropic mechanical properties and zero-stiffness as reported previously. The simulation results obtained demonstrate that the tensile response of CHC is closely related to the deformation of its constitutive graphene nanoribbons. To illustrate the underlying deformation mechanisms of the nanoribbons, the evolution of their atomic structure during the deformation is characterised by calculating several characteristic bond lengths and angles, and the atomic stress distribution. It is found that when tensile loading is applied in the armchair direction, the graphene nanoribbons undergo severe distortion and subsequent distortion flattening as the tensile strain increases, which leads to the zero-stiffness behaviour. For the tensile loading applied in the zigzag direction, the graphene nanoribbons are mainly stretched without distortion, giving rise to the anisotropic tensile response of CHC. In addition to the zero-stiffness and anisotropic behaviour, the negative Poisson’s effect is also observed when a tensile loading is applied in the armchair direction.
Premis Makanan di Malaysia Tidak Mesra OKU.pdf
Creators: name: Ating, Rashid
name: Mathassan, Sirotulnaimah
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 390107
subject: Humanities and social sciences curriculum and pedagogy (excl. economics, business and management)
classificationCode: 460105
subject: Applications in social sciences and education
classificationCode: 500206
subject: History and philosophy of the social sciences

description: Tidak dinafikan bahawa Malaysia dikenali sebagai satu daripada negara terkemuka di rantau Asia. Walau bagaimanapun, dari segi pelaksanaan hak asasi manusia untuk orang kurang upaya (OKU), Malaysia masih jauh ketinggalan berbanding dengan negara lain seperti Thailand dan Indonesia yang melaksanakan dasar dan undang-undang untuk OKU secara lebih harmoni dan menyeluruh berlandaskan Konvensyen Pertubuhan Bangsa-Bangsa Bersatu Orang Kurang Upaya (CRPD)
Enhancement/Depletion Mode InGaP/AlGaAs PHEMT Process for High Efficiency Power Amplifiers
Creators: name: Tkachenko, Y.
name: Zhao, Y.
name: Wei, C.
name: Bartle, D.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2000
Subjects: ING-INF/01 Elettronica

description: An integrated enhancement/depletion mode InGaP/AlGaAs power PHEMT process is demonstrated for various single- and dual-supply high efficiency power amplifiers. This technology utilizes excellent etch selectivity and surface charge screening properties of InGaP material. At 900 MHz D-mode PHEMT features output power density of 630 mW/mm with PAE=85% at 7 V, while E-mode PHEMT features PAE>70% from 2 to 7 V and high output power densities, especially at lower voltages.
InP-BASED HBT with graded InGaAlAs BASE layer grown by LP-MOVPE
Creators: name: Kim, S-O.
name: Velling, P.
name: Agethen, M.
name: Reimann, Th.
name: Prost, W.
name: Tegude, F.-J.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2000
Subjects: ING-INF/01 Elettronica

description: A compositionally graded InGaAlAs:C base layer is inserted in an InP-based HBT grown by LP-MOVPE with a novel non-gaseous source configuration. Due to the addition of 6% Al the active hole concentration in the HBT base layer, deduced from Hall measurements, is increased from 1.5 10 19 to 3.8 10 19 cm -3 . Moreover, an In-grading within the base layer results in an intrinsic electric field of about 5.4 kV/cm. A high dc current gain of β = 35 is provided at a high p-type doping level. First HBT devices exhibit a current gain cut-off frequency of fT = 117 GHz and an unilateral gain cut-off frequency of 90 GHz (not de-embedded).
A new approach to the design of low noise stable broadband micro wave amplifier
Creators: name: Gunel, Tayfun
name: Yazgan, Bingul
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1994
Subjects: ING-INF/01 Elettronica

description: In this paper a new approach to the design of stable broadband amplifier is shown. A new hybrid optimization algorithm based on Controlled Random Search (CRS) procedure for global optimization and Adaptive Complex "Acomplex" has been applied to the design of the broad-band microwave amplifier, Design method takes gain flatness, low noise factor, amplifier stability, loss factor associated with each reactive element and matching circuit realizability into account simultaneously,
Anomalous electromagnetic response of superconducting Rashba systems in trivial and topological phases
Creators: name: Ojanen, Teemu
name: Kitagawa, Takuya
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Two-dimensional electron systems with spin-orbit coupling in the proximity of a superconductor and a magnetic insulator have recently been considered as promising candidates to realize topological superconducting phases. Here we discuss electromagnetic response properties of these systems. Breaking of time-reversal symmetry leads to an anomalous Hall effect with a characteristic non-monotonic gate voltage dependence and a Hall conductivity that can change a sign as temperature is varied. The imaginary part of the Hall conductivity at finite frequency, which shows up for example in the Kerr rotation or photoabsorption, can distinguish different topological phases. In addition, we demonstrate the existence magnetoelectric effects associated with the Hall effect; in-plane electric fields induce a parallel magnetization and in-plane time-dependent magnetic fields induce parallel electric current.
description: 6 pages, 6 Figs
Optimization of InGaAsP-based BRAQWET heterostructures
Creators: name: Bava, G.P.
name: Debernardi, P.
name: Autore, G.
name: Campi, D.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1994
Subjects: ING-INF/01 Elettronica

description: A new class of optical switching structures has been recently proposed, the barrier resevoir and quantum well electron transfer structures (BRAQWETS), which are based on the voltage-control transfer of electrons in multiple-quantum wells. This type of modulators provides stronger electro-absorption and refraction than structures based on the quantum confined Stark effect, although the optical confinement is smaller due to the necessarily limited number of quantum wells. The purpose of this presentation is to investigate the fabrication and the basic physics of InP-based BRAQWET structures toward optimization of device performances.
Der Einfluß der Mikrodissektionstechnik auf den intra- und postoperativen Transfusionbedarf in der onkologischen Chirurgie
Creators: name: Brauckhoff, Katrin
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2001
Subjects: Elektronische Publikation
Zsfassung in engl. Sprache

description: Introduction: According to the variuos risks of heterologous blood transfusions and the decreasing frequency of blood donation, blood sparing methods are required. The aim of this study was to investigate the influence of microdissection technique introduced in 1994 on the frequency of blood transfusion during extensive oncological operations. Method: In a retrospective analysis, the transfusion rate of the years 1992 and 1993 were compared with the transfusion rate of the years 1995 and 1999. In total, 591 patients operated on a malignant tumour were recorded. Results: A significant reduction of the transfusion rate following introduction microdissection technique has been found. The decreased frequency of blood transfusion based on a decreased intraoperative transfusion rate. In 1992 and 1993, the frequency of blood transfusion was 83%. In 1995 and 1999 blood transfusions were required in only 45% of the patients (p Conclusion: With regard to introduction of the microdissection technique using new coagulation instruments and haemostyptica, a significant reduction of the intraoperative transfusion rate hase been observed. These results will be used as guidelines for preoperative blood supply in our institution.
Mikania obovata DC.
Creators: name: Araújo, Diogo
name: Alves, Marccus
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Asterales
Asteraceae
Mikania
Mikania obovata

description: 13. Mikania obovata DC.
Brazil (Pernambuco, Bahia, Rio de Janeiro).
Selected Voucher:—Zambana, 14 March 2007, Alves-Araújo et al. 887 (UFP).
BIGNONIACEAE
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 16, DOI: 10.11646/phytotaxa.8.1.1, http://zenodo.org/record/4893863
Statistical Properties and Decay of Correlations for Interval Maps with Critical Points and Singularities
Creators: name: Luzzatto, Stefano
name: Melbourne, Ian
Publisher: name: arXiv
Year: 2011
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: We consider a class of piecewise smooth one-dimensional maps with critical points and singularities (possibly with infinite derivative). Under mild summability conditions on the growth of the derivative on critical orbits, we prove the central limit theorem and a vector-valued almost sure invariance principle. We also obtain results on decay of correlations.
description: 18 pages, minor revisions, to appear in Communications in Mathematical Physics
Noise and impedance of submicron InP diodes
Creators: name: Gruzhinskis, V.
name: Starikov, E.
name: Shiktorov, P.
name: Gricius, R.
name: Mitin, V.
name: Reggiani, L.
name: Varani, L.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1994
Subjects: ING-INF/01 Elettronica

description: The noise power spectral density of submicron n+nn+ InP diode loaded by a resistor R is investigated making use of a Monte Carlo particle technique and a closed hydrodynamic approach. We observe a peak in the spectrum which is caused by the spontaneous formation of electron accumulation layers. Furthermore, the drift of these layers through the n-region is monitored for biasing conditions above threshold for microwave generation. The frequency of the noise peak is shown to correspond to the highest generation frequency at the given R.
Klimeschiopsis Povolny 1967
Creators: name: Huemer, Peter
name: Karsholt, Ole
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Gelechiidae
Klimeschiopsis

description: Genus Klimeschiopsis Povolný, 1967
 Klimeschiopsis Povolný, 1967.
 Type species: Klimeschiopsis discontinuella (Rebel, 1899), by original designation.
  Klimeschiopsis discontinuella (Rebel, 1899)  (European Alps)
 Gelechia discontinuella Rebel, 1899
  Klimeschiopsis maritimaealpina Nel & Varenne, 2011  (Alps of France and North-western Italy)
  Klimeschiopsis varia Šumpich & Bidzilya, 2022  (Siberia)
  Klimeschiopsis kiningerella (Duponchel, 1843)  (Northern and central Europe to Ural Mts. and Tukey) Lita kiningerella Duponchel, 1843
 Phthorimaea atralbella Palm, 1947
  Klimeschiopsis terroris (Hartig, 1938)  (North-eastern Spain)
 Phthorimaea terroris Hartig, 1938
  Klimeschiopsis confusella Šumpich & Bidzilya, 2022  (Siberia)
  Klimeschiopsis arnoldfransorum sp. nov.  (Southern Spain)
  Klimeschiopsis afghana Povolný, 1968  (Afghanistan)
  Klimeschiopsis sinevi Bidzilya, 2012  (Southern Caucasus and Iran)
  Klimeschiopsis sp.  (Pakistan)
  Klimeschiopsis sp.  (Eastern Turkey)
  Klimeschiopsis sp.  (North America)
 Remarks. A more widely distributed species in North America was already examined by the first author during the generic revision of Caryocolum (Huemer 1988), but remained taxonomically untouched at that time due to its lack of relevance. However, DNA barcodes now available suggest with high probability the presence of at least one additional, genetically variable species. A formal description is withheld, though, so as not to preempt competent colleagues. A further possibly undescribed taxon is known from a single barcoded specimen from Pakistan and was already mentioned by Šumpich & Bidzilya (2022), and another one is known from four specimens from East Turkey, differing in morphology.
Extensive generic descriptions were published by Povolný (1967) and Huemer & Karsholt (2010) and are not repeated herein. The systematic arrangement of species is mainly based on superficial morphological resemblance of wing pattern and genitalia structures.
description: Published as part of Huemer, Peter & Karsholt, Ole, 2023, Klimeschiopsis terroris auctt. from Spain-a further case of cryptic diversity in European Lepidoptera (Lepidoptera, Gelechiidae, Gelechiinae), pp. 400-412 in Zootaxa 5369 (3) on pages 401-402, DOI: 10.11646/zootaxa.5369.3.4, http://zenodo.org/record/10146771
Analytical model of GaAs BMFET structures
Creators: name: Bellone, S.
name: Cocorullo, G.
name: Rinaldi, N.
name: Vitale, G.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1994
Subjects: ING-INF/01 Elettronica

description: A model of the d.c. operation of the GaAs Bipolar Mode Field Effect Transistor (BMFET) is presented. The model in based on a approximate, closed-form solution of the fundamental transport equations, and includes some two-dimensional effects that were not included in previously developed models of silicon BMFET structures. A comparison with the characteristics of a experimental device shows that the incorporation of the 2D effects allows an accurate modeling of the GaAs device.
Affine extensions of non-crystallographic Coxeter groups induced by projection
Creators: name: Dechant, Pierre-Philippe
name: Boehm, Celine
name: Twarock, Reidun
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Group Theory (math.GR)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: In this paper, we show that affine extensions of non-crystallographic Coxeter groups can be derived via Coxeter-Dynkin diagram foldings and projections of affine extended versions of the root systems E_8, D_6 and A_4. We show that the induced affine extensions of the non-crystallographic groups H_4, H_3 and H_2 correspond to a distinguished subset of the Kac-Moody-type extensions considered in Dechant et al. This class of extensions was motivated by physical applications in icosahedral systems in biology (viruses), physics (quasicrystals) and chemistry (fullerenes). By connecting these here to extensions of E_8, D_6 and A_4, we place them into the broader context of crystallographic lattices such as E_8, suggesting their potential for applications in high energy physics, integrable systems and modular form theory. By inverting the projection, we make the case for admitting different number fields in the Cartan matrix, which could open up enticing possibilities in hyperbolic geometry and rational conformal field theory.
description: 34 pages, 11 figures
Counting free fermions on a line: a Fisher-Hartwig asymptotic expansion for the Toeplitz determinant in the double-scaling limit
Creators: name: Ivanov, Dmitri A.
name: Abanov, Alexander G.
name: Cheianov, Vadim V.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We derive an asymptotic expansion for a Wiener-Hopf determinant arising in the problem of counting one-dimensional free fermions on a line segment at zero temperature. This expansion is an extension of the result in the theory of Toeplitz and Wiener-Hopf determinants known as the generalized Fisher-Hartwig conjecture. The coefficients of this expansion are conjectured to obey certain periodicity relations, which renders the expansion explicitly periodic in the "counting parameter". We present two methods to calculate these coefficients and verify the periodicity relations order by order: the matrix Riemann-Hilbert problem and the Painleve V equation. We show that the expansion coefficients are polynomials in the counting parameter and list explicitly first several coefficients.
description: 11 pages, minor corrections, published version
A numerical optimization approach to switching surface design for switching linear parameter-varying control
Creators: name: Javadian, Moein
Publisher: name: University of British Columbia
Year: 2014

description: This thesis proposes an algorithm to design switching surfaces for the switching linear parameter-varying (LPV) controller with hysteresis switching. The switching surfaces are sought for to optimize the bound of the closed-loop L2-gain performance. An optimization problem is formulated with respect to parameters characterizing Lyapunov matrix variables, local controller matrix variables, and locations of the switching surfaces. Since the problem turns out to be non-convex in terms of these characterizing parameters, a numerical algorithm is given to guarantee the decrease of the cost function value after each iteration, which consists of two steps: direction selection and line search. A hybrid method which is a combination of the steepest descent method and Newton's method is employed in the direction selection step to decide the orientation of proceeding. A numerical algorithm is used to compute the most appropriate length of the proceeding along the selected direction which generates the most decrease in the cost function. To demonstrate the efficiency and usefulness of the proposed algorithm, it will be applied to three examples in control applications: a tracking problem for a mass-spring-damper system, a vibration suppression problem for a magnetically-actuated optical image stabilizer, and an air-fuel-ratio control problem for automotive engines. In these examples, it will be shown that the proposed optimization approach to the design of the switching surfaces and the switching LPV controller is superior to heuristic approaches in closed-loop performances, at the price of higher computational costs. Additionally, it will be shown that the algorithm can be applied to the general n-parameters case.
Numerical study of the series resistances in deep-submicrometer recess gate MESFETs
Creators: name: Asenov, A.
name: Cameron, N.
name: Taylor, M.
name: Beaumont, S. P.
name: Barker, J. R.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1994
Subjects: ING-INF/01 Elettronica

description: We report on a new approach to the extraction of the series resistances in recess gate submicrometer MESFETs. The method is based on numerical simulation of the device characteristics using finite element description of the recess shape and realistically treatment of the surface effects. For the first time the contribution of the recess region in the total series resistance is estimated separately. The method is applied to 200 nm gate length MESFETs fabricated recently in the Nanoelectronics research centre at the Glasgow University.
Multi-Superthreads and Supersheets
Creators: name: Niehoff, Benjamin E.
name: Vasilakis, Orestis
name: Warner, Nicholas P.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We obtain new BPS solutions of six-dimensional, N = 1 supergravity coupled to a tensor multiplet. These solutions are sourced by multiple "superthreads" carrying D1-D5-P charges and two magnetic dipole charges. These new solutions are sourced by multiple threads with independent and arbitrary shapes and include new shape-shape interaction terms. Because the individual superthreads can be given independent profiles, the new solutions can be smeared together into continuous "supersheets," described by arbitrary functions of two variables. The supersheet solutions have singularities like those of the three-charge, two dipole-charge generalized supertube in five dimensions and we show how such five-dimensional solutions emerge from a very simple choice of profiles. The new solutions obtained here also represent an important step in finding superstrata, which are expected to play a role in the description of black-hole microstates, due to their ability to store a large amount of entropy in their two-dimensional profile.
description: 17 pages, 2 figures
A new coherent extraction method of FETS and HEMTS models for MMIC applications
Creators: name: Portilla, J.
name: Campovecchio, M.
name: Quere, R.
name: Obregon, J.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1994
Subjects: ING-INF/01 Elettronica

description: In this paper, we present a study of broad band FET model parameter extraction problems. A novel modeling method, providing reliable FET small-signal model parameters, is presented and compared with well-known extraction methods. The named extrinsic elements are optimized to yield a broad band coherent model and the optimization approach is based on "simulated annealing" method which overcomes the multi-minimum optimization problems. Bias dependence of some of the named extrinsic elements are reported and discussed. In particular, physical explanations of the negative resistance values, based on quasi 2D physical simulations , are discussed and the novel extraction method is evaluated by MMIC FETS and HEMTS broad band measurements.
Heterostructure barrier varactor multipliers
Creators: name: Dillner, Lars
name: Ingvarson, Mattias
name: Kollberg, Erik
name: Stake, Jan
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2000
Subjects: ING-INF/01 Elettronica

description: The Heterostructure Barrier Varactor (HBV) diode and its application in frequency multipliers is reviewed. Different material systems and HBV models are described. Multiplier performance versus diode parameters and some practical multiplier designs are discussed as well. The best result until now is an efficiency of 12% and an output power of 9 mW at an output frequency of 250 GHz.
The Berry phase in inflationary cosmology
Creators: name: Pal, Barun Kumar
name: Pal, Supratik
name: Basu, B.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We derive an analogue of the Berry phase associated with inflationary cosmological perturbations of quantum mechanical origin by obtaining the corresponding wavefunction. We have further shown that cosmological Berry phase can be completely envisioned through the observable parameters, viz. spectral indices. Finally, physical significance of this phase is discussed from the point of view of theoretical and observational aspects with some possible consequences of this quantity in inflationary cosmology.
description: 9 pages, Modified version to appear in Classical and Quantum Gravity. arXiv admin note: text overlap with arXiv:quant-ph/0307084 by other authors
Adenocalymma hypostictum Bureau & K. Schum.
Creators: name: Araújo, Diogo
name: Alves, Marccus
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Lamiales
Bignoniaceae
Adenocalymma
Adenocalymma hypostictum

description: 14. Adenocalymma hypostictum Bureau & K.Schum. in Mart. (Fig. 2A)
Brazil (Pernambuco, Bahia, Espírito Santo, Rio de Janeiro).
Selected Vouchers:—Piedade, Araújo et al. 380 (UFP, 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 16, DOI: 10.11646/phytotaxa.8.1.1, http://zenodo.org/record/4893863
Damping of package resonances in microwave integrated circuits: a FDTD analysis
Creators: name: Mezzanotte, P.
name: Mongiardo, M.
name: Roselli, L.
name: Sorrentino, R.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1994
Subjects: ING-INF/01 Elettronica

description: In this paper, a graded mesh FDTD code running on the massive parallel computer DEC 12000 with 4K processors has been applied to analyzed various MMIC discontinuities enclosed in a metal package and fed by coaxial transitions. Observe that, in the present approach, the circuit and the package are analyzed as a whole. Moreover, also the effects of the feeding connectors have been thoroughly modeled. Since the package introduces resonances several different possibilities to choke off these resonances have been investigated. It is shown that the common practice of inserting a damping layer just below the lid is often not effective. In particular, the importance of placing damping layers also on the side walls is demonstrated.
Lundia cordata A. DC.
Creators: name: Araújo, Diogo
name: Alves, Marccus
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Lamiales
Bignoniaceae
Lundia
Lundia cordata

description: 15. Lundia cordata (Vell.) A.DC.
Brazil (Ceará, Pernambuco, Alagoas, Bahia, Goiás, Espírito Santo), Peru
Selected Voucher:—Zambana, 17 July 2007, Araújo et al. 329 (IPA); Macacos, Alves-Araújo et al. 276 (UFP), Araújo et al. 482 (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 16, DOI: 10.11646/phytotaxa.8.1.1, http://zenodo.org/record/4893863
Monte Carlo simulation of electronic noise in MESFETs
Creators: name: Gonzalez, Tomas
name: Pardo, Daniel
name: Varani, Luca
name: Reggiani, Lino
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1994
Subjects: ING-INF/01 Elettronica

description: We present a two-dimensional Monte Carlo analysis of electronic noise associated with velocity fluctuations in GaAs MESFETs. By applying two operation modes, the current and voltage fluctuations at the different terminals of the device are investigated. Moreover, we provide the spatial location of the voltage fluctuations. The noise in the drain current increases with the level of the current, and remains constant with frequency at least up to 100 GHz. In the case of the gate current, the noise is null at low frequency and then increases quadratically.
Structural Characterization And Condition For Measurement Statistics Preservation Of A Unital Quantum Operation
Creators: name: Lee, Kai-Yan
name: Fung, Chi-Hang Fred
name: Chau, H. F.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We investigate the necessary and sufficient condition for a convex cone of positive semidefinite operators to be fixed by a unital quantum operation $ϕ$ acting on finite-dimensional quantum states. By reducing this problem to the problem of simultaneous diagonalization of the Kraus operators associated with $ϕ$, we can completely characterize the kind of quantum states that are fixed by $ϕ$. Our work has several applications. It gives a simple proof of the structural characterization of a unital quantum operation that acts on finite-dimensional quantum states --- a result not explicitly mentioned in earlier studies. It also provides a necessary and sufficient condition for what kind of measurement statistics is preserved by a unital quantum operation. Finally, our result clarifies and extends the work of Størmer by giving a proof of a reduction theorem on the unassisted and entanglement-assisted classical capacities, coherent information, and minimal output Renyi entropy of a unital channel acting on finite-dimensional quantum state.
description: 9 pages in revtex 4.1, minor revision, to appear in J.Phys.A
Simulation of the performance of microwave MESFETs using a distributed model
Creators: name: Martin-Guerrero, T.M.
name: Camacho-Peñalosa, C.
name: Entrambasaguas-Munoz, J.T.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1994
Subjects: ING-INF/01 Elettronica

description: A MESFET distributed model that accounts for transversal propagation effects is used to simulate a medium power MESFET. It is shown that distributed effects become important in practical devices and, therefore, cannot be ignored.
On a (β,q)-generalized Fisher information and inequalities involving q-Gaussian distributions
Creators: name: Bercher, J. -F.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Information Theory (cs.IT)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: In the present paper, we would like to draw attention to a possible generalized Fisher information that fits well in the formalism of nonextensive thermostatistics. This generalized Fisher information is defined for densities on $\mathbb{R}^{n}.$ Just as the maximum Rényi or Tsallis entropy subject to an elliptic moment constraint is a generalized q-Gaussian, we show that the minimization of the generalized Fisher information also leads a generalized q-Gaussian. This yields a generalized Cramér-Rao inequality. In addition, we show that the generalized Fisher information naturally pops up in a simple inequality that links the generalized entropies, the generalized Fisher information and an elliptic moment. Finally, we give an extended Stam inequality. In this series of results, the extremal functions are the generalized q-Gaussians. Thus, these results complement the classical characterization of the generalized q-Gaussian and introduce a generalized Fisher information as a new information measure in nonextensive thermostatistics.
description: v2: corrected equation (A5)
Recent Development in Device Technology for Integrated THz-Circuits
Creators: name: Hartnagel, H.L.
name: Lin, C.I.
name: Rodriguez, M.
name: Ichizli, V.
name: Saglam, M.
name: Szeliga, P.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2000
Subjects: ING-INF/01 Elettronica

description: Recently there is significantly increasing interest in the development of THz devices and circuits. Different from the MMIC device and circuit technologies, THz devices approach to the electrical limit of semiconductors and passive THz circuit elements have much less dimension tolerance. Therefore, device and circuit technologies concerning to such limitations have to be reconsidered and modified. In this paper a review of the important device technologies used in the THz frequency regime is presented.
Airy beam induced optical routing
Creators: name: Rose, Patrick
name: Diebel, Falko
name: Boguslawski, Martin
name: Denz, Cornelia
Publisher: name: arXiv
Year: 2012
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We present an all-optical routing scheme based simultaneously on optically induced photonic structures and the Airy beam family. The presented work utilizes these accelerating beams for the demonstration of an all-optical router with individually addressable output channels. In addition, we are able to activate multiple channels at the same time providing us with an optically induced splitter with configurable outputs. The experimental results are corroborated by corresponding numerical simulations.
Short- and long-range cis interactions between integrated HPV genomes and cellular chromatin dysregulate host gene expression in early cervical carcinogenesis
Creators: name: Groves, Ian J.
name: Drane, Emma L. A.
name: Michalski, Marco
name: Monahan, Jack M.
name: Scarpini, Cinzia G.
name: Smith, Stephen P.
name: Bussotti, Giovanni
name: Várnai, Csilla
name: Schoenfelder, Stefan
name: Fraser, Peter
name: Enright, Anton J.
name: Coleman, Nicholas
Publisher: name: Apollo - University of Cambridge Repository
Year: 2021
Subjects: Research Article
Biology and life sciences
Medicine and health sciences
Research and analysis methods

description: Development of cervical cancer is directly associated with integration of human papillomavirus (HPV) genomes into host chromosomes and subsequent modulation of HPV oncogene expression, which correlates with multi-layered epigenetic changes at the integrated HPV genomes. However, the process of integration itself and dysregulation of host gene expression at sites of integration in our model of HPV16 integrant clone natural selection has remained enigmatic. We now show, using a state-of-the-art ‘HPV integrated site capture’ (HISC) technique, that integration likely occurs through microhomology-mediated repair (MHMR) mechanisms via either a direct process, resulting in host sequence deletion (in our case, partially homozygously) or via a ‘looping’ mechanism by which flanking host regions become amplified. Furthermore, using our ‘HPV16-specific Region Capture Hi-C’ technique, we have determined that chromatin interactions between the integrated virus genome and host chromosomes, both at short- (<500 kbp) and long-range (>500 kbp), appear to drive local host gene dysregulation through the disruption of host:host interactions within (but not exceeding) host structures known as topologically associating domains (TADs). This mechanism of HPV-induced host gene expression modulation indicates that integration of virus genomes near to or within a ‘cancer-causing gene’ is not essential to influence their expression and that these modifications to genome interactions could have a major role in selection of HPV integrants at the early stage of cervical neoplastic progression.
On the swap-distances of different realizations of a graphical degree sequence
Creators: name: Erdős, Péter L.
name: Király, Zoltán
name: Miklós, István
Publisher: name: arXiv
Year: 2012
Subjects: subject: Combinatorics (math.CO)
subject: Discrete Mathematics (cs.DM)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 05C07, 05C85, 05C20, 68R10

description: One of the first graph theoretical problems which got serious attention (already in the fifties of the last century) was to decide whether a given integer sequence is equal to the degree sequence of a simple graph (or it is {\em graphical} for short). One method to solve this problem is the greedy algorithm of Havel and Hakimi, which is based on the {\em swap} operation. Another, closely related question is to find a sequence of swap operations to transform one graphical realization into another one of the same degree sequence. This latter problem got particular emphases in connection of fast mixing Markov chain approaches to sample uniformly all possible realizations of a given degree sequence. (This becomes a matter of interest in connection of -- among others -- the study of large social networks.) Earlier there were only crude upper bounds on the shortest possible length of such swap sequences between two realizations. In this paper we develop formulae (Gallai-type identities) for these {\em swap-distance}s of any two realizations of simple undirected or directed degree sequences. These identities improves considerably the known upper bounds on the swap-distances.
description: to be published
Analysis of a Hurst parameter estimator based on the modified Allan variance
Creators: name: Bianchi, Alessandra
name: Bregni, Stefano
name: Crimaldi, Irene
name: Ferrari, Marco
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2012
Subjects: MAT/06 Probabilità e statistica matematica

description: In order to estimate the Hurst parameter of Internet traffic data, it has been recently proposed a log-regression estimator based on the so-called modified Allan variance(MAVAR). Simulations have shown that this estimator achieves higher accuracy and better confidence when compared with other methods of common use. Here we link it to the wavelets setting and provide an asymptotic analysis in the case the signal process is a fractional Brownian motion. In particular we show that the MAVAR log-regression estimator is consistent and asymptotically normal, providing the related confidence intervals for a suitable choice on the regression weights. Finally, we show some numerical examples.
Filtrations induced by continuous functions
Creators: name: Di Fabio, Barbara
name: Frosini, Patrizio
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2012
Subjects: MAT/03 Geometria

description: In Persistent Homology and Topology, filtrations are usually given by introducing an ordered collection of sets or a continuous function from a topological space to R^n. A natural question arises, whether these approaches are equivalent or not. In this paper we study this problem and prove that, while the answer to the previous question is negative in the general case, the approach by continuous functions is not restrictive with respect to the other, provided that some natural stability and completeness assumptions are made. In particular, we show that every compact and stable 1-dimensional filtration of a compact
metric space is induced by a continuous function. Moreover, we extend the previous result to the case of multi-dimensional filtrations, requiring that our filtration is also complete. Three examples show that we cannot drop the assumptions about stability and completeness.
Thermodynamically-consistent mesoscopic model of the ferro/paramagnetic transition
Creators: name: Benešová, Barbora
name: Kružík, Martin
name: Roubíček, Tomáš
Publisher: name: arXiv
Year: 2012
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: A continuum evolutionary model for micromagnetics is presented that, beside the standard magnetic balance laws, includes thermo-magnetic coupling. To allow conceptually efficient computer implementation, inspired by relaxation method of static minimization problems, our model is mesoscopic in the sense that possible fine spatial oscillations of the magnetization are modeled by means of Young measures. Existence of weak solutions is proved by backward Euler time discretization.
The therapeutic potential of apelin in kidney disease.
Creators: name: Chapman, Fiona A
name: Nyimanu, Duuamene
name: Maguire, Janet J
name: Davenport, Anthony P
name: Newby, David E
name: Dhaun, Neeraj
Publisher: name: Apollo - University of Cambridge Repository
Year: 2021

description: Chronic kidney disease (CKD) is a leading cause of global morbidity and mortality and is independently associated with cardiovascular disease. The mainstay of treatment for CKD is blockade of the renin-angiotensin-aldosterone system (RAAS), which reduces blood pressure and proteinuria and slows kidney function decline. Despite this treatment, many patients progress to kidney failure, which requires dialysis or kidney transplantation, and/or die as a result of cardiovascular disease. The apelin system is an endogenous physiological regulator that is emerging as a potential therapeutic target for many diseases. This system comprises the apelin receptor and its two families of endogenous ligands, apelin and elabela/toddler. Preclinical and clinical studies show that apelin receptor ligands are endothelium-dependent vasodilators and potent inotropes, and the apelin system has a reciprocal relationship with the RAAS. In preclinical studies, apelin regulates glomerular haemodynamics and acts on the tubule to promote aquaresis. In addition, apelin is protective in several kidney injury models. Although the apelin system has not yet been studied in patients with CKD, the available data suggest that apelin is a promising potential therapeutic target for kidney disease.
III. Redactio Articulis Optimi: estrazioni di frasi alleggerite per un dizionario con lessico pesante
Creators: name: Tonfoni, Graziella
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2012
Subjects: L-FIL-LET/12 Linguistica italiana

description: In questo breve articolo, l'autrice dimostra come sia possibile applicare un sistema automatico di volta pagina, premessa progettuale per un nuovo dizionario scientifico, che le permette di iniziare una era letteraria distinta, a partire dal 2010 in poi, solo se sia tale meccanismo di spartiacque elettronico, sia accompagnato da una rigorosa compattazione parallela delle rimanenti tracce storiche, quelle precedenti, predisponendo criteri di classificazione distinti, categorie diverse, che possano armoniosamente accompagnare la progressiva ed irreversibile resa museale, delle suppellettili cartacee del suo passato, intese ora esclusivamente, come testimonianze materiali di ere storiche, ormai antiche, che l' autrice abbia ancora la responsabilità culturale, di vedere adeguatamente rappresentate e custodite.
Le collezioni di tali pagine, manufatti cartacei, antichi supporti informatici, dischetti, cd rom ed agende fuori uso, vengono assegnate quindi, progressivamente, a collezionisti europei, esperti di antiquariato scientifico, che presentino un loro profilo culturale di provata qualità, che dimostrano la loro esperienza, competenza ed interesse preciso. Potranno così affiancare il proprio nome e cognome, di proprietari delle collezioni, a quello delle suppellettili scientifiche, in quanto i loro interventi garantiscono una conservazione museale, di ogni prototipo editoriale, scientifico, letterario, che non ha più dal 2010 in poi, alcuna finalità didattica, ma può essere corredato da una semplice didascalia informativa. L'esempio più significativo, di tale organizzazione, rispettosa dei materiali antichi, nel relativo contesto, ma anche del tempo dei visitatori attuali, che non devono più essere lettori attenti, e possono restare visionatori accurati delle teche, ove sia preservato tale patrimonio, è 'La Collezione Austriaca Peter Simlinger dei Manufatti Testuali Residuali da Bologna, di Tonfoni Graziella (1980- 2010)', che si sta sviluppando proprio nel corso del 2012, trasformando quindi un immaginario scientifico europeo apocalittico, in un una letteraria ed apodittica versione poetica italiana.
Phryganocydia corymbosa K. Schum.
Creators: name: Araújo, Diogo
name: Alves, Marccus
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Lamiales
Bignoniaceae
Phryganocydia
Phryganocydia corymbosa

description: 16. Phryganocydia corymbosa (Vent.) Bureau ex K.Schum. in Engler & Prantl
Central America, Venezuela, Ecuador, Peru, Brazil (widely distributed). Semi-deciduous to perennial Atlantic forest (Gentry 1997).
Selected Vouchers:—Piedade, Melo et al. 45 (IPA, UFP); Macacos, Albuquerque et al. 297 (IPA).
CELASTRACEAE
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 16, DOI: 10.11646/phytotaxa.8.1.1, http://zenodo.org/record/4893863
Studies of the nitration of cellulose - application in new membrane materials
Creators: name: Cheung, Clement
Publisher: name: University of British Columbia
Year: 2015

description: Since the discovery of the production of nanocrystalline cellulose (NCC) from acid hydrolysis of bulk cellulose, this material has been used as a template for imparting photonic properties on materials without innate structural ordering and as an additive in polymer composites to increase structural strength. However, the potential of NCC as a feedstock for highly nitrated cellulose has not been investigated. It is postulated that the smaller chain lengths in NCC may permit a higher degree of nitration in comparison with conventional nitrocellulose. In this thesis, various nitration methods have been investigated for their ability to produce highly nitrated NCC. Traditional nitration methods using HNO₃/H₂SO₄ and less common nitration methods using HNO₃/P₂O₅ and HNO₃/Ac₂O were used and the differences between methods were studied. There was an effect in using H₂SO₄ as the desiccant on the hindrance of the degree of nitration. Titration of the nitrated material with base shows the presence of more sulfate groups in samples nitrated in the presence of H₂SO₄ than in the absence of it, demonstrating that H₂SO₄ is a less ideal desiccant. In addition, pretreatment of NCC with a desulfation procedure improved the degree of nitration. The investigation of the other desiccants showed the importance of using a miscible, non-degrading desiccant to obtain a high degree of nitration. The synthesized nitrated nanocrystalline cellulose, hereby abbreviated as NNC, were analyzed by elemental analysis for the nitrogen content, powder X-ray diffraction for crystallinity, Fourier-transform infrared spectroscopy and thermal gravimetric analysis for the stability of the compound.
Minimal configurations and sandpile measures
Creators: name: Jarai, Antal A.
name: Werning, Nicolas
Publisher: name: arXiv
Year: 2011
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60K35 (Primary) 82B20 (Secondary)

description: We give a new simple construction of the sandpile measure on an infinite graph G, under the sole assumption that each tree in the Wired Uniform Spanning Forest on G has one end almost surely. For, the so called, generalized minimal configurations the limiting probability on G exists even without this assumption. We also give determinantal formulas for minimal configurations on general graphs in terms of the transfer current matrix.
description: 16 pages; the introduction has been expanded and minor corrections have been made