cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Simulation of stochastic systems via polynomial chaos expansions and convex optimization
Creators: name: Fagiano, Lorenzo
name: Khammash, Mustafa
Publisher: name: arXiv
Year: 2012
Subjects: subject: Computation (stat.CO)
subject: Systems and Control (eess.SY)
subject: Mathematical Physics (math-ph)
subject: Dynamical Systems (math.DS)
subject: Optimization and Control (math.OC)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Polynomial Chaos Expansions represent a powerful tool to simulate stochastic models of dynamical systems. Yet, deriving the expansion's coefficients for complex systems might require a significant and non-trivial manipulation of the model, or the computation of large numbers of simulation runs, rendering the approach too time consuming and impracticable for applications with more than a handful of random variables. We introduce a novel computationally tractable technique for computing the coefficients of polynomial chaos expansions. The approach exploits a regularization technique with a particular choice of weighting matrices, which allow to take into account the specific features of Polynomial Chaos expansions. The method, completely based on convex optimization, can be applied to problems with a large number of random variables and uses a modest number of Monte Carlo simulations, while avoiding model manipulations. Additional information on the stochastic process, when available, can be also incorporated in the approach by means of convex constraints. We show the effectiveness of the proposed technique in three applications in diverse fields, including the analysis of a nonlinear electric circuit, a chaotic model of organizational behavior, finally a chemical oscillator.
description: This manuscript is a preprint of a paper published on Physical Reviews E and is subject to American Physical Society copyright. The copy of record is available at http://pre.aps.org. http://link.aps.org/doi/10.1103/PhysRevE.86.036702
Electrothermal and trapping effects characterisation of AlGaN/GaN HEMTs
Creators: name: Charbonniaud, C.
name: De Meyer, S.
name: Quéré, R.
name: Teyssier, JP.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: ING-INF/01 Elettronica

description: This paper presents a systematic analysis of the two kinds of traps encountered in AlGaN/GaN HEMTs. It is shown that passivation is very efficient to minimize the surface trap effects but has little effect on the buffer traps. Those ones can only be eliminated through the development of high purity substrates. Moreover thermal I-V and microwave behaviour of such transmissions is investigated through the use of a pulse-measurement system.
A Hybrid Self-Oscillating Mixer Based on InP Heterojunction Interband Tunnel HEMT for Wireless Applications
Creators: name: Camprini, M.
name: Magrini, Iacopo
name: Collodi, G.
name: Cidronali, A.
name: Nair, Vijay
name: Manes, Gianfranco
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: ING-INF/01 Elettronica

description: The monolithic integration of Tunneling Diodes (TDs)with other semiconductor devices,creates novel quantum functional devices and circuits with unique properties:the Negative Differential Resistance (NDR)and the extremely low DC power consumption.In this paper we present the design,fabrication and characterization of a Self-Oscillating Mixer (SOM)based on InP-HEMT \TD technology.The circuit is based on a 2.526 GHZ VCO that draws a current of 1.3mA at 500mV and generates an output power of –21.5dBm on a 50 : load.The SOM is able to down-convert RF signals in the 2.25 –2.85 GHz band to an IF frequency in the 20-300 MHz band,with a conversion loss in the range 32-40 dB.
The Two Component Optical Conductivity in the Cuprates: A Necessary Consequence of Preformed Pairs
Creators: name: Wulin, Dan
name: Guo, Hao
name: Chien, Chih-Chun
name: Levin, K.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We address how the finite frequency real conductivity $σ(ω)$ in the underdoped cuprates is affected by the pseudogap, contrasting the behavior above and below $T_c$. The f-sum rule is analytically shown to hold. Here we presume the pseudogap is associated with non-condensed pairs arising from stronger-than-BCS attraction. This leads to both a Drude and a mid infrared (MIR) peak, the latter associated with the energy needed to break pairs. These general characteristics appear consistent with experiment. Importantly, there is no more theoretical flexibility (phenomenology) here than in BCS theory; the origin of the two component conductivity we find is robust.
description: 5 pages, 3 figures
Phobetus LeConte 1856
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Phobetus

description: Phobetus LeConte, 1856
[11 species].
Type species Phobetus comatus LeConte, 1856, by monotypy.
description: Published as part of Allsopp, Peter G. & Schoolmeesters, Paul, 2024, All genera of the world: Subfamilies Prototroginae, Cretoscarabaeinae, Dynamopodinae, Electrorubesopsinae, Phaenomeridinae, Orphninae, Allidiostomatinae, Aclopinae, Lichniinae, Melolonthinae, Oncerinae, Podolasiinae, Sericinae, Sericoidinae (Animalia: Arthropoda: Insecta: Coleoptera: Scarabaeidae), pp. 104-175 in Megataxa 12 (1) on page 127, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
Large Signal Properties of AlGaN/GaN HEMTs on High Resistivity Silicon Substrates Grown by MBE
Creators: name: Sutton, William E.
name: Pavlidis, Dimitris
name: Lahrèche, Hacène
name: Damilano, Benjamin
name: Langer, Robert
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: ING-INF/01 Elettronica

description: The large signal characteristics of 1 Pm long S-gate AlGaN/GaN HEMTs on resistive silicon substrates have been measured and analyzed.The HEMTs demonstrated maximum transconductance and current density values of 350 mS/mm and 1,200 mA/mm respectively.High current gain and maximum power gain frequencies ft and fmax were measured at 25 GHz and 43 GHz .Large signal gain and power density values of 16 dBand 1.7 W/mm for a two-finger 1x75 Pm 2 HEMT respectively were observed at 5 GHz.The device also exhibited PAE values as high as 40%with P1dB around +2.0 dBm for Class AB operation.
Molekularzytogenetische Charakterisierung eines Deletions- bzw. Duplikationssyndroms im proximalen 15q-Arm
Creators: name: Hohner, Melanie Sophie
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2011
Subjects: subject: Online-Publikation
subject: Hochschulschrift
subject: 611

description: Bei zwei Patienten mit unklaren Dysmorphiesyndromen stellen sich zytogenetisch Chromosomenaberrationen im Bereich des Chromosoms 15 dar: eine de novo Deletion del(15)(q11.2q13.3) bei einer Probandin (Probandin 1) mit Verdacht auf ein atypisches Prader-Willi-Syndrom sowie eine maternal vererbte partielle Trisomie der Banden 15q14q15 bei einem Probanden (Proband 2) mit unklarem Dysmorphiesyndrom. Mittels Fluoreszenz-in-situ-Hybridisierung (FISH) wurden die beiden Bruchpunkte der Chromosomenaberrationen jeweils mit Chromosomen-spezifischen „Bacterial artificial chromosome“-(BAC)-Klonen molekularzytogenetisch präziser eingegrenzt. Der proximale Bruchpunkt der Deletion von Probandin 1 wird in der Region zweier sich überlappender BAC-Klone (RP11-483L3 und RP11-73C9) festgelegt. Bei der Analyse des distalen Bruchpunktes der Deletion von Probandin 1 wird ein Bruchpunkt-überspannender BAC-Klon (RP11-242M5) aufgezeigt. Die Deletion kann einem etwa 10 Mb großen Bereich in 15q11.2q13.3 zugeordnet werden. Durch Mikrosatellitenanalyse kann eine paternale Deletion belegt werden. Die Bruchpunkte der partiellen Trisomie beim Probanden 2 werden jeweils der Region zweier sich überlappender BAC-Klone (RP11-638N6 und RP11-60L22 für den proximalen; RP11-960H11 und RP11-124A24 für den distalen Bruchpunkt) zugeordnet. Die gesamte trisome Region beim Probanden 2 ist etwa 5,1 Mb groß und lässt sich in 15q14q15 eingrenzen. Durch whole chromosome painting bei der Mutter des Probanden 2 wird abgeleitet, dass die partielle Trisomie maternalen Ursprungs ist. In-silico-Analysen der entsprechenden Chromosomenregionen ergeben, dass durch die Deletion/partielle Trisomie keine bekannten Gene deletiert/verdreifacht/unterbrochen werden. Der Vergleich mit Fällen aus der Literatur erbringt, dass Patienten mit ähnlichem Genotyp zwar phänotypische Gemeinsamkeiten aufweisen, insgesamt jedoch eine sehr große Streuung bezüglich der Ausprägung besteht. Die Phänotypen sind möglicherweise durch ein contiguous gene syndrome verursacht.
Edge states and topological phases in one-dimensional optical superlattices
Creators: name: Lang, Li-Jun
name: Cai, Xiaoming
name: Chen, Shu
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We show that one-dimensional quasi-periodic optical lattice systems can exhibit edge states and topological phases which are generally believed to appear in two-dimensional systems. When the Fermi energy lies in gaps, the Fermi system on the optical superlattice is a topological insulator characterized by a nonzero topological invariant. The topological nature can be revealed by observing the density profile of a trapped fermion system, which displays plateaus with their positions uniquely determined by the ration of wavelengths of the bichromatic optical lattice. The butterfly-like spectrum of the superlattice system can be also determined from the finite-temperature density profiles of the trapped fermion system. This finding opens an alternative avenue to study the topological phases and Hofstadter-like spectrum in one-dimensional optical lattices.
description: 4.3 pages, 5 figures, version accepted by Phys. Rev. Lett
Tachyon Condensation Due to Domain-Wall Annihilation in Bose-Einstein Condensates
Creators: name: Takeuchi, Hiromitsu
name: Kasamatsu, Kenichi
name: Tsubota, Makoto
name: Nitta, Muneto
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We show theoretically that a domain-wall annihilation in two-component Bose-Einstein condensates causes tachyon condensation accompanied by spontaneous symmetry breaking in a two-dimensional subspace. Three-dimensional vortex formation from domain-wall annihilations is considered a kink formation in subspace. Numerical experiments reveal that the subspatial dynamics obey the dynamic scaling law of phase-ordering kinetics. This model is experimentally feasible and provides insights into how the extra dimensions influence subspatial phase transition in higher-dimensional space.
description: 9 pages, 5 figures
The evolution of the rest-frame J- and H-band luminosity function of galaxies to z=3.5
Creators: name: Stefanon, Mauro
name: Marchesini, Danilo
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present the rest-frame J- and H-band luminosity function (LF) of field galaxies, based on a deep multi-wavelength composite sample from the MUSYC, FIRES and FIREWORKS survey public catalogues, covering a total area of 450 arcmin^2. The availability of flux measurements in the Spitzer IRAC 3.6, 4.5, 5.8, and 8 um channels allows us to compute absolute magnitudes in the rest-frame J and H bands up to z=3.5 minimizing the dependence on the stellar evolution models. We compute the LF in the four redshift bins 1.5
description: 14 pages, 12 figures. MNRAS accepted
Turbulence lifetimes: what we can learn from the physics of glasses
Creators: name: Dauchot, Olivier
name: Bertin, Eric
Publisher: name: arXiv
Year: 2012
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: In this note, we critically discuss the issue of the possible finiteness of the turbulence lifetime in subcritical transition to turbulence in shear flows, which attracted a lot of interest recently. We briefly review recent experimental and numerical results, as well as theoretical proposals, and compare the difficulties arising in assessing this issue in subcritical shear flow with that encountered in the study of the glass transition. In order to go beyond the purely methodological similarities, we further elaborate on this analogy and propose a qualitative mapping between these two apparently unrelated situations, which could possibly foster new directions of research in subcritical shear flows.
description: 10 pages, 4 figures
Adolescent sexual behaviors and neighborhood context : what are the roles of intergenerational closure and social capital?
Creators: name: Moore, Lorinda
Publisher: name: University of British Columbia
Year: 2013

description: Neighborhood social capital—resources inherent in social networks—has been shown to be associated with the heath behaviors of neighborhood residents. This association, however, has been found to be both positive and negative, indicating that the ways in which neighborhood networks influence individual health behaviors vary. In this thesis, I formulate and test hypotheses concerning how neighborhood intergenerational closure—the extent to which local parents know each other and their children—and different forms of social capital (social support, social leverage, informal social control, and neighborhood organization participation) may be both positively and negatively associated with adolescent sexual behaviors (engagement in sexual intercourse, number of sexual partners, and condom use). Analyses of multi-level data from the Los Angeles Family and Neighborhood Survey (n=662 adolescents residing in 65 census tracts), indicate that greater intergenerational closure is associated with decreased odds of ever having sex and having inconsistent condom use. By contrast, greater informal social control is associated with increased odds of ever having sex and having inconsistent condom use. Neither intergenerational closure nor any of the four forms of social capital were found to be predictive of number of sexual partners. The findings highlight the complex ways in which the communities in which they reside may influence adolescents’ sexual behaviors.
Matrix-valued orthogonal polynomials related to (SU(2)\times SU(2),diag), II
Creators: name: Koelink, Erik
name: van Pruijssen, Maarten
name: Roman, Pablo
Publisher: name: arXiv
Year: 2012
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: In a previous paper we have introduced matrix-valued analogues of the Chebyshev polynomials by studying matrix-valued spherical functions on SU(2)\times SU(2). In particular the matrix-size of the polynomials is arbitrarily large. The matrix-valued orthogonal polynomials and the corresponding weight function are studied. In particular, we calculate the LDU-decomposition of the weight where the matrix entries of L are given in terms of Gegenbauer polynomials. The monic matrix-valued orthogonal polynomials P_n are expressed in terms of Tirao's matrix-valued hypergeometric function using the matrix-valued differential operator of first and second order to which the P_n's are eigenfunctions. From this result we obtain an explicit formula for coefficients in the three-term recurrence relation satisfied by the polynomials P_n. These differential operators are also crucial in expressing the matrix entries of P_nL as a product of a Racah and a Gegenbauer polynomial. We also present a group theoretic derivation of the matrix-valued differential operators by considering the Casimir operators corresponding to SU(2)\times SU(2).
description: 35 pages, sequel to arXiv:1012.2719, incorporating referee's comments (including change in title)
Phyllotocidium Blackburn 1898
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Phyllotocidium

description: Phyllotocidium Blackburn, 1898
[4 species].
Type species Cheiraga macleayi Blackburn, 1892, by monotypy.
description: Published as part of Allsopp, Peter G. & Schoolmeesters, Paul, 2024, All genera of the world: Subfamilies Prototroginae, Cretoscarabaeinae, Dynamopodinae, Electrorubesopsinae, Phaenomeridinae, Orphninae, Allidiostomatinae, Aclopinae, Lichniinae, Melolonthinae, Oncerinae, Podolasiinae, Sericinae, Sericoidinae (Animalia: Arthropoda: Insecta: Coleoptera: Scarabaeidae), pp. 104-175 in Megataxa 12 (1) on page 127, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
Consistent Energy-based Atomistic/Continuum Coupling for Two-body Potentials in Three Dimensions
Creators: name: Shapeev, Alexander V.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65N30, 70C20, 74G15, 74G65

description: Very few works exist to date on development of a consistent energy-based coupling of atomistic and continuum models of materials in more than one dimension. The difficulty in constructing such a coupling consists in defining a coupled energy whose minimizers are free from uncontrollable errors on the atomistic/continuum interface. In this paper a consistent coupling in three dimensions is proposed. The main achievement of this work is to identify and efficiently treat a modified Cauchy-Born continuum model which can be coupled to the exact atomistic model. The convergence and stability of the method is confirmed with numerical tests.
description: 29 pages, 1 Matlab code. Typos corrected, exposition improved
Testing quantum entanglement with local measurement
Creators: name: Xie, Qing
name: Wu, X. -X.
name: Ding, X. -M.
name: Yang, W. -L.
name: Yue, R. -H.
name: Fan, H.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose to detect quantum entanglement by a condition of local measurments. We find that this condition can detect efficiently the pure entangled states for both discrete and continuous variable systems. It does not depend on interference of decoherence from noise and detection loss in some systems, which allows a loophole-free test in real experiments. In particular, it is a necessary condition for the violation of some generalized Bell inequalities.
description: 5 pages
Emergence of scale-free close-knit friendship structure in online social networks
Creators: name: Cui, Ai-xiang
name: Zhang, Zi-ke
name: Tang, Ming
name: Hui, Pak Ming
name: Fu, Yan
Publisher: name: arXiv
Year: 2012
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Social and Information Networks (cs.SI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Despite the structural properties of online social networks have attracted much attention, the properties of the close-knit friendship structures remain an important question. Here, we mainly focus on how these mesoscale structures are affected by the local and global structural properties. Analyzing the data of four large-scale online social networks reveals several common structural properties. It is found that not only the local structures given by the indegree, outdegree, and reciprocal degree distributions follow a similar scaling behavior, the mesoscale structures represented by the distributions of close-knit friendship structures also exhibit a similar scaling law. The degree correlation is very weak over a wide range of the degrees. We propose a simple directed network model that captures the observed properties. The model incorporates two mechanisms: reciprocation and preferential attachment. Through rate equation analysis of our model, the local-scale and mesoscale structural properties are derived. In the local-scale, the same scaling behavior of indegree and outdegree distributions stems from indegree and outdegree of nodes both growing as the same function of the introduction time, and the reciprocal degree distribution also shows the same power-law due to the linear relationship between the reciprocal degree and in/outdegree of nodes. In the mesoscale, the distributions of four closed triples representing close-knit friendship structures are found to exhibit identical power-laws, a behavior attributed to the negligible degree correlations. Intriguingly, all the power-law exponents of the distributions in the local-scale and mesoscale depend only on one global parameter -- the mean in/outdegree, while both the mean in/outdegree and the reciprocity together determine the ratio of the reciprocal degree of a node to its in/outdegree.
description: 48 pages, 34 figures
Prompt electrons driving ion acceleration and formation of a two temperatures plasma in nanosecond laser-ablation domain
Creators: name: Mascali, D.
name: Tudisco, S.
name: Gambino, N.
name: Pluchino, A.
name: Anzalone, A.
name: Musumeci, F.
name: Rapisarda, A.
name: Spitaleri, A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present the results of an experiment on plasma generation via laser ablation at 10^12 W/cm^2 of power intensity and in a nanosecond domain. Prompt electrons emission and complex plasma plume fragmentation were simultaneously observed for the first time in this laser intensity regime, along with a double electron temperature inside the plasma bulk surviving for a long time to the plume expansion. 1D PIC simulations are in agreement with experimental data as long as the emission of initial prompt electrons is considered. This assumption results to be the key to explain all the other experimental evidences.
description: 5 pages, 6 figures, Europhysics Letters in press
Aethiaratrogus Decelle 1982
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Aethiaratrogus

description: Aethiaratrogus Decelle, 1982
[3 species].
Type species Rhizotrogus clypeatus Blanchard, 1851, by original designation.
description: Published as part of Allsopp, Peter G. & Schoolmeesters, Paul, 2024, All genera of the world: Subfamilies Prototroginae, Cretoscarabaeinae, Dynamopodinae, Electrorubesopsinae, Phaenomeridinae, Orphninae, Allidiostomatinae, Aclopinae, Lichniinae, Melolonthinae, Oncerinae, Podolasiinae, Sericinae, Sericoidinae (Animalia: Arthropoda: Insecta: Coleoptera: Scarabaeidae), pp. 104-175 in Megataxa 12 (1) on page 127, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
Cryogenic Investigation of Current Collapse in AlGaN/GaN HFETS
Creators: name: Nuttinck, S.
name: Pinel, S.
name: Gebara, E.
name: Laskar, J.
name: Harris, M.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: ING-INF/01 Elettronica

description: Current collapse in AlGaN/GaN HFETs is investigated at low temperatures using a transient current monitoring technique. The carrier trapping and de-trapping mechanisms are studied, and two distinct relaxation mechanisms are observed. They are associated to the presence of two close deep energy levels in the bandgap.
A 10 Gb/s CMU in SiGe BiCMOS commercial technology with multistandard capability
Creators: name: Centurelli, F.
name: Golfarelli, Alessandro
name: Guinea, Jesus
name: Masini, Leonardo
name: Morigi, Damiana
name: Pozzoni, Massimo
name: Scotti, Giuseppe
name: Trifiletti, Alessandro
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: ING-INF/01 Elettronica

description: A 10 Gb/s CMU has been fabricated in a commercial SiGe BiCMOS technology featuring multistandard compliance with SDH/SONET and 10 GbE specifications,dual reference clock frequency and output jitter below 80 mUIpp.The phase tracking loop uses a charge pump with low common mode current to minimize frequency ripple.Power supply is 2.5 and 3.3 V and the total power consumption is below 480 mW.
Contacts Dynamics Reveals Widom Lines for Jamming
Creators: name: Coulais, C.
name: Behringer, R. P.
name: Dauchot, O.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We experimentally study the vicinity of the Jamming transition by investigating the statics and the dynamics of the contact network of an horizontally shaken bi-disperse packing of photo-elastic discs. Compressing the packing very slowly, while maintaining a mechanical excitation, yields a granular glass, namely a frozen structure of vibrating grains. In this glass phase, we observe a remarkable dynamics of the contact network, which exhibits strong dynamical heterogeneities. Such heterogeneities are maximum at a packing fraction $ϕ^*$, \emph{distinct} and smaller than the jamming packing fraction $ϕ_J$, which is indicated by the abrupt variation of the average number of contact per particle. We demonstrate that the two cross-overs, one for the maximum dynamical heterogeneity, and the other for static jamming, converge at point J in the zero mechanical excitation limit, a behavior reminiscent of the Widom lines in the supercritical phase of a second order critical point. Our findings are discussed in the light of recent numerical and theoretical studies of thermal soft spheres.
description: 5 pages, 5 figures, to appear in EPL
A novel algorithm for simultaneous SNP selection in high-dimensional genome-wide association studies
Creators: name: Zuber, Verena
name: Silva, A. Pedro Duarte
name: Strimmer, Korbinian
Publisher: name: arXiv
Year: 2012
Subjects: subject: Applications (stat.AP)
subject: Genomics (q-bio.GN)
subject: FOS: Computer and information sciences
subject: FOS: Biological sciences

description: Background: Identification of causal SNPs in most genome wide association studies relies on approaches that consider each SNP individually. However, there is a strong correlation structure among SNPs that need to be taken into account. Hence, increasingly modern computationally expensive regression methods are employed for SNP selection that consider all markers simultaneously and thus incorporate dependencies among SNPs. Results: We develop a novel multivariate algorithm for large scale SNP selection using CAR score regression, a promising new approach for prioritizing biomarkers. Specifically, we propose a computationally efficient procedure for shrinkage estimation of CAR scores from high-dimensional data. Subsequently, we conduct a comprehensive comparison study including five advanced regression approaches (boosting, lasso, NEG, MCP, and CAR score) and a univariate approach (marginal correlation) to determine the effectiveness in finding true causal SNPs. Conclusions: Simultaneous SNP selection is a challenging task. We demonstrate that our CAR score-based algorithm consistently outperforms all competing approaches, both uni- and multivariate, in terms of correctly recovered causal SNPs and SNP ranking. An R package implementing the approach as well as R code to reproduce the complete study presented here is available from http://strimmerlab.org/software/care/ .
description: 15 pages, 2 figures, 4 tables
20 Gbit/s Decision Feedback Loop for Optical Communications
Creators: name: Gu, Zheng
name: Thiede, Andreas
name: Möller, Lothar
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: ING-INF/01 Elettronica

description: A new concept for a high-speed data decision with a feedback loop for cancellation of intersymbol interferences (ISI)is proposed.Operation up to over 20 Gbit/s has been measured.The improved speed performance has been obtained by a new concept merging the parallel principle and a twin DC references approach.
Amadotrogus Reitter 1902
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Amadotrogus

description: Amadotrogus Reitter, 1902, as Amphimallus (Amadotrogus)
[8 species and 1 additional subspecies].
Type species Rhizotrogus quercanus Burmeister, 1855, by monotypy. Status revised to Amadotrogus by Coca-Abia & Martin-Piera (2002).
description: Published as part of Allsopp, Peter G. & Schoolmeesters, Paul, 2024, All genera of the world: Subfamilies Prototroginae, Cretoscarabaeinae, Dynamopodinae, Electrorubesopsinae, Phaenomeridinae, Orphninae, Allidiostomatinae, Aclopinae, Lichniinae, Melolonthinae, Oncerinae, Podolasiinae, Sericinae, Sericoidinae (Animalia: Arthropoda: Insecta: Coleoptera: Scarabaeidae), pp. 104-175 in Megataxa 12 (1) on page 127, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
A 75 GHz Current Mode Logic Static Frequency Divider Realized in a Commercially Available InP Process
Creators: name: Collins, Thomas E.
name: Betti-Berutto, A.
name: Long, Stephen I.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: ING-INF/01 Elettronica

description: This work presents the fastest Current Mode Logic static frequency divider to date.The circuit is fabricated in a commercially available InP process. Microwave techniques are used to achieve speeds of 75 GHz without resort to emitter followers.Interconnect design is stressed and the results of several variations are presented. Microstrip,inverted microstrip,peaking inductors and keep-alive currents have all been fabricated and compared.
title: ICES EcoSystemData - Delivering data and tools that facilitate the study of climate and fisheries exploitation interactions
Creators: name: Pinto, Carlos
name: Jensen, Hans Mose
name: Holdsworth, Neil
Publisher: name: ASC 2009 - Theme session F
Year: 2024
Subjects: Fisheries and aquaculture
Pressures, impacts, conservation, and management

description: No abstracts are to be cited without prior reference to the author.This paper describes the EcoSystemData integrated repository of data. This system was developed to improve the integrated data requests covering for example, the study of climate change in relation to large ecosystem dynamics. A major step forward in EcoSystemData is to join physical, chemical and biological measurements into one system. The data can be queried and analysed in ways that would otherwise have been far more difficult for scientists looking across fisheries and sea climate disciplines.
Diurnal modulation due to self-interacting mirror and hidden sector dark matter
Creators: name: Foot, R.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Mirror and more generic hidden sector dark matter models can simultaneously explain the DAMA, CoGeNT and CRESST dark matter signals consistently with the null results of the other experiments. This type of dark matter can be captured by the Earth and shield detectors because it is self-interacting. This effect will lead to a diurnal modulation in dark matter detectors. We estimate the size of this effect for dark matter detectors in various locations. For a detector located in the northern hemisphere, this effect is expected to peak in April and can be detected for optimistic parameter choices. The diurnal variation is expected to be much larger for detectors located in the southern hemisphere. In particular, if the CoGeNT detector were moved to e.g. Sierra Grande, Argentina then a $5 σ$ dark matter discovery would be possible in around 30 days of operation.
description: About 20 pages, minor changes, matches published version
A Monolithically Integrated InP-Based HBT and p-i-n Photodiode Using New Stack-Shared Layer Scheme
Creators: name: Kim, Moonjung
name: Cha, Jung-Ho
name: Shin, Seong-Ho
name: Jeon, Soo-Kun
name: Kim, Jaeho
name: Kwon, Young-Se
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: ING-INF/01 Elettronica

description: New stack-shared layer scheme has been developed to integrate monolithically InP-based heterojunction bipolar transistor (HBT)and p-i-n photodiode.In this layer scheme,a p + -and intrinsic InGaAs layers for a photodiode were stacked on n + -InP emitter layer, which is shared as both emitter contact layer for an HBT and n-type contact layer for a photodiode.The fabricated HBTs demonstrated excellent high-speed characteristics of f T =108 GHz and f max =300 GHz.The photodiode,formed with an undoped 4300 Å-thick InGaAs as an absorption layer,exhibited a dark current of 6 nA under 5 V reverse bias,with a responsivity of 0.3 A/W at 1.55 Pm optical radiation.A 3-dB bandwidth of the photodiodes with diameters smaller than 25 Pm was over 20 GHz.High-  frequency performances of both devices were observed dueto the advantages of the stack-shared layer scheme,characterized by independent optimization of the devicelayer structure and moderate nonplanarity.
An SiGe/Si Heterojunction Phototransistor for Opto-Microwave
Applications:Modeling and first Experimental Results
Creators: name: Polleux, J.L.
name: Moutier, F.
name: Billabert, A.L.
name: Rumelhard, C.
name: Sönmez, E.
name: Schumacher, H.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: ING-INF/01 Elettronica

description: A first SiGe bipolar heterojunction phototransistor developed in a commercial available SiGe/Si technology is presented.Emphasis on the development of a complete numerical model for the simulation of strained- SiGe based devices is given.The SiGe HPT exhibits a dc opto-microwave power gain of 3.46dB,i.e.a responsivity with 50Ohms loads of 1.49A/W,and a –3dB bandwidth of 0.4GHz at 940nm.Power budgets are drawn with the use of the opto-microwave power gain ’s monogram chart.
Noncompliance and instrumental variables for 2K factorial experiments*
Creators: name: Blackwell, Matthew
name: Pashley, Nicole E.
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Neuroscience
subject: Pharmacology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Developmental Biology
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: Hematology
subject: 110309 Infectious Diseases

description: Factorial experiments are widely used to assess the marginal, joint, and interactive effects of multiple concurrent factors. While a robust literature covers the design and analysis of these experiments, there is less work on how to handle treatment noncompliance in this setting. To fill this gap, we introduce a new methodology that uses the potential outcomes framework for analyzing 2K factorial experiments with noncompliance on any number of factors. This framework builds on and extends the literature on both instrumental variables and factorial experiments in several ways. First, we define novel, complier-specific quantities of interest for this setting and show how to generalize key instrumental variables assumptions. Second, we show how partial compliance across factors gives researchers a choice over different types of compliers to target in estimation. Third, we show how to conduct inference for these new estimands from both the finite-population and superpopulation asymptotic perspectives. Finally, we illustrate these techniques by applying them to a field experiment on the effectiveness of different forms of get-out-the-vote canvassing. New easy-to-use, open-source software implements the methodology.
Physics-Based Device Simulation of Lag and Power Compression in GaAs FETs
Creators: name: Kasai, D.
name: Kazami, Y.
name: Mitani, Y.
name: Horio, K.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: ING-INF/01 Elettronica

description: Two-dimensional transient simulation of GaAs FETs are performed in which substrate traps, surface states and impact ionization of carriers are considered. The mechanisms of lag phenomena and so-called power compression are discussed. It is shown that the drain-lag occurs mainly due to substrate traps, and the gate-lag mainly by surface states. Obtained quasi-pulsed I-V curves clearly indicate that the power compression can occur both due to substrate traps and due to surface states. Effects of the impact ionization on these phenomena are also discussed.
SÍNTESE RÁPIDA DE EVIDÊNCIAS PARA POLÍTICAS DE SAÚDE: medidas para mitigação da transmissão da SARS-COV-2 na comunidade escolar no contexto de retorno à escola.
Creators: name: Santos, Adriana de Almeida
name: Oliveira, Cintia de Freitas
name: Shine, Lumi Sano
name: Bortoli, Maritsa Carla de
name: Venâncio, Sonia Isoyama
Publisher: name: Zenodo
Year: 2021
Subjects: Política Informada por Evidências;
Formulação de Políticas;
Revisão Sistemática;
Escolas;
Retorno à Escola.

description: Devido a pandemia da COVID-19, 192 países ao redor do mundo fecharam as escolas como medida de controle da transmissão do vírus, afetando mais de 90% da população mundial de estudantes (Krishnaratne S e at., 2020). Tal medida teve grande impacto tanto na sociedade de forma geral, como na comunidade escolar, em especial no desenvolvimento socioeducacional das crianças. No Brasil, apesar das taxas de transmissão do vírus em diversos estados ainda estarem altas em 2021, diversos governos municipais, estaduais e federal optaram pela reabertura das escolas, inclusive o município de Franco da Rocha. Assim, é necessário que se identifiquem medidas de mitigação para garantir um retorno à escola seguro. Diante disso, foi feito o presente protocolo de elaboração de síntese de evidências com objetivo de identificar opções para a mitigação do SARS-COV-2 na comunidade escolar no contexto de retorno de atividades presenciais.
Amphimallon Latreille 1825
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Amphimallon

description: Amphimallon Latreille, 1825
[73 species and 13additional subspecies].
Type species Scarabaeus solstitialis Linnaeus, 1758, by monotypy.
Note: Latreille (1825) proposed this genus under the French vernacular name Amfimalle. Stephens (1830) incorrectly spelt Amphimallon as “ Amphimalla ”, Mulsant (1842) incorrectly spelt Amphimallon as “ Amphimallus ”, and Agassiz (1846) incorrectly spelt Amphimallon as “ Amphimallum ”.
Zantheumia Stephens, 1829.
Type species Scarabaeus solstitialis Linnaeus, 1758, by monotypy. Objective synonym of Amphimallon Latreille.
Microdonta Hope, 1837 (not Microdonta Chevrolat, 1836).
Type species Melolontha pini Olivier, 1789, by original designation. Synonymy by Dalla Torre (1912c).
Amphimallina Reitter, 1905.
Type species Amphimallina jenrichi Reitter, 1905 (= Amphimallon volgense (Fischer, 1823)), by monotypy. Synonymy by Coca-Abia (2003).
Amphimallon (Erytrotrogus) Iablokoff-Khnzorian, 1955. Type species Amphimallon (Erytrotrogus) medvedevi Iablokoff-Khnzorian, 1955, by monotypy. Synonymy by Baraud (1992).
description: Published as part of Allsopp, Peter G. & Schoolmeesters, Paul, 2024, All genera of the world: Subfamilies Prototroginae, Cretoscarabaeinae, Dynamopodinae, Electrorubesopsinae, Phaenomeridinae, Orphninae, Allidiostomatinae, Aclopinae, Lichniinae, Melolonthinae, Oncerinae, Podolasiinae, Sericinae, Sericoidinae (Animalia: Arthropoda: Insecta: Coleoptera: Scarabaeidae), pp. 104-175 in Megataxa 12 (1) on pages 127-128, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
Molecular contributions to species descriptions of dicyemid mesozoans
Creators: name: Eshragh, Roya Marie
Publisher: name: University of British Columbia
Year: 2013

description: Dicyemids are enigmatic parasites found only within the excretory systems of benthic cephalopods. Over the past century, dicyemids have been considered to be either complex protozoa, “mesozoa” that are ambiguously intermediate between protozoa and metazoa, or reduced metazoans. The phylogenetic position and overall diversity of dicyemids is poorly understood. Current species identification criteria are unconvincing because they are based solely on morphological traits. I set out to test current morphological species concepts with DNA barcodes from dicyemids collected from Pacific Northwest cephalopods. Variation within sequences of the small subunit (18S) rRNA gene was explored because this marker (1) is known to be fast-evolving in parasitic eukaryotes, (2) is one of the few molecular markers to have been previously sequenced in some dicyemids, and (3) has been used successfully as a barcode in other groups of parasites. Three host species of cephalopods were collected in this study, each hosting multiple historical morphospecies of dicyemid parasites. Thirty-four individual dicyemids encompassing eight morphospecies were isolated and their 18S rDNA sequenced. Molecular phylogenetic analyses of these data were incongruent with current morphology-based species concepts. The 18S rDNA sequences suggest that each host species of cephalopod harbors only one species of dicyemid with a great deal of morphological variation. However, the 18S rDNA sequences should eventually be tested with other rapidly evolving molecular markers. Attempts were made to sequence the mitochondrial cytochrome oxidase I (COI) gene, the mitochondrial 16S rRNA gene, and both Internal Transcribed Spacers (ITS) of the nuclear rRNA operon. With so little of the dicyemid genome known, I was unable to establish reliable primer pairs for these genes within the time constraints of my MSc thesis. Nonetheless, this study has shown that DNA barcoding is a powerful tool for the delimitation of dicyemid species. Understanding the diversity of parasite species is particularly problematic because they tend to be devoid of consistent (informative) morphological traits while simultaneously rich in morphological variation associated with developmental stages and environmental conditions. The addition of DNA barcodes to dicyemid diversity will simplify and improve species boundaries in a lineage that is difficult to define in every aspect.
A novel coupled physics-based electromagnetic model of semiconductor traveling-wave structures for RF and optoelectronic applications
Creators: name: Bertazzi, F.
name: Cappelluti, F.
name: Bonani, F.
name: Goano, M.
name: Ghione, G.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: ING-INF/01 Elettronica

description: The design of traveling-wave structures for high-speed analog and digital circuits requires accurate modeling to deal with arbitrary cross-sections, metallic regions with fi-nite conductivity, and semiconductor layers. The presence of such high-conductivity layers can strongly affect the microwave propagation characteristics of quasi-TEM transmission lines; in fact, free carrier screening of the electric field in regions penetrated by the magnetic field can lead to slow-wave behaviour. In the present paper, we present a numerical technique which combines a charge transport model with the quasi-static solution of Maxwell’s equations, thus allowing an accurate and self-consistent evaluation of the quasi-TEM line parameters. The proposed approach is applied to the analysis of a Si-Ge p-i-n raveling-wave photodetector.
Preliminary assessment of total mercury concentrations in fishes from rivers, lakes and reservoirs in New Jersey
Creators: name: No Name Supplied
Publisher: name: No Publisher Supplied
Year: 1994

description: Bioaccumulation of mercury in fish is of concern because of potential human health effects from fish consumption, as well as potential effects on fish-eating wildlife. Human-caused inputs of mercury to the environment have occurred from industrial point source discharges, various nonpoint sources (e.g., mercury in pesticides), release of trace quantities of mercury in coal (e.g., by power plants), and processing of mercury-contaminated waste (e.g., by incineration). Atmospheric transport can contribute significant quantities of mercury to waterbodies without point sources. For example, mercury is found in fish from remote Arctic lakes, and mercury concentrations in fish from Midwestern and Canadian lakes (e.g., Minnesota, Michigan, Ontario) have led to consumption advisories. Contaminated soil and sediment can lead to continued inputs after cessation of direct discharge. In New Jersey, atmospheric inputs may come from both local and distant sources, while aquatic inputs may have come from industrial use of mercury within the state.
Fine-grained lower limit of entropic uncertainty in the presence of quantum memory
Creators: name: Pramanik, T.
name: Chowdhury, P.
name: Majumdar, A. S.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The limitation on obtaining precise outcomes of measurements performed on two non-commuting observables of a particle as set by the uncertainty principle in its entropic form, can be reduced in the presence of quantum memory. We derive a new entropic uncertainty relation based on fine- graining, which leads to an ultimate limit on the precision achievable in measurements performed on two incompatible observables in the presence of quantum memory. We show that our derived uncertainty relation tightens the lower bound set by entropic uncertainty for members of the class of two-qubit states with maximally mixed marginals, while accounting for the recent experimental results using maximally entangled pure states and mixed Bell-diagonal states. An implication of our uncertainty relation on the security of quantum key generation protocols is pointed out.
description: Latex, 5 pages, one encapsulated figure, accepted for publication in Physical Review Letters
The Effects of Extended Depletion Region on Noise Modeling of HEMT ’s
Creators: name: Mishra, Meena
name: Muralidharan, R.
name: Harsh, *
name: Islam, S.S.
name: Das, Mukunda B.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: ING-INF/01 Elettronica

description: In this paper we present a high frequency noise model for short channel HEMTs.This model takes into account the effect of depletion region that extends into gate to drain spacing.The effect of this high field extension region on the noise performance of three HEMT structures is analytically calculated and compared with measured data.
Argument of Thomas N. McCarter at the opening of the company's case on the petition for the reduction in electric rates before the Board of Public Utility Commissioners of New Jersey
Creators: name: No Name Supplied
Publisher: name: No Publisher Supplied
Year: 1934

description: This document contains the argument of Thomas N. McCarter, President of Public Service Corporation of New Jersey and Public Service Electric and Gas Company, at the opening of the company's case for the reduction in electric rates.
A Scalable PHEMT Model Taking Into Account Electromagnetic and Electro-Thermal Effects
Creators: name: Cidronali, A.
name: Collodi, G.
name: Accillaro, C.
name: Toccafondi, C.
name: Vannini, G.
name: Santarelli, A.
name: Manes, G.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: ING-INF/01 Elettronica

description: The paper proposes an approach to model a P-HEMT taking into account for the electrical-thermal- electromagnetic behavior in an effective way.The model is based on the integration of a distributed approach,which considers an intrinsic device for gate finger,each of them equipped with a thermal equivalent circuit.The latter considers also the mutual interacting between the adjacent intrinsic devices by means a voltage-controlled voltage- source that allows considering the thermal coupling by a series of coefficients determined in an analytical way.The electrical model has been extracted from a 2x150um PHEMT and then applied to predict the DC and RF characteristic of a 8x150um proving the model scalability capability.