cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Exploring minijets beyond the leading power
Creators: name: Kotko, P.
name: Stasto, A. M.
name: Strikman, M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The crucial parameter of the current Monte Carlo models of high energy hadron-hadron interaction is the transverse momentum cutoff $p_{T0}$ for parton-parton interactions which slowly grows with energy and regularizes the cross section. This modification of the collinear factorization formula goes beyond the leading power and thus a natural question arises if such cutoff can be extracted from a formalism which takes into account power corrections. In this work, we consider the High Energy Factorization (HEF) valid at small $x$ and a new model, based on a similar principle to HEF, which in addition has a limit respecting the Dokshitzer-Dyakonov-Troyan formula for the dijet momentum disbalance spectrum. Minijet cross section and its suppression is then analyzed in two ways. First, we study minijets directly in the low-$p_T$ region, and demonstrate that higher twist corrections do generate suppression of the inclusive jet production cross section though these effects are not leading to the increase of the cutoff with incident energy. Second, we consider hard inclusive dijet production where Multi Parton Interactions (MPIs) with minijets produce power corrections. We introduce an observable constructed from differential cross section in the ratio $τ$ of dijet disbalance to the average dijet $p_T$ and demonstrate that the $τ>1$ region is sensitive to the cutoff $p_{T0}$ in the MPI minijet models. The energy dependence of the cutoff is reflected in the energy dependence of the bimodality coefficient $b$ of the $τ$ distribution. We compare $b$ calculated from $\mathsf{pythia}$, where one can conveniently control MPIs by the program parameters, and HEF for a few unintegrated gluon distributions (UGDs). We find that the energy dependence of $b$ is very sensitive to the particular choice of UGD and in some models it resembles predictions of the Monte Carlo models.
description: 35 pages, 15 figures
Percolation model with an additional source of disorder
Creators: name: Kundu, Sumanta
name: Manna, S. S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The ranges of transmission of the mobiles in a Mobile Ad-hoc Network are not uniform in reality. They are affected by the temperature fluctuation in air, obstruction due to the solid objects, even the humidity difference in the environment, etc. How the varying range of transmission of the individual active elements affects the global connectivity in the network may be an important practical question to ask. Here a new model of percolation phenomena, with an additional source of disorder, has been introduced for a theoretical understanding of this problem. As in ordinary percolation, sites of a square lattice are occupied randomly with the probability $p$. Each occupied site is then assigned a circular disc of random value $R$ for its radius. A bond is defined to be occupied if and only if the radii $R_1$ and $R_2$ of the discs centered at the ends satisfy certain pre-defined condition. In a very general formulation, one divides the $R_1 - R_2$ plane into two regions by an arbitrary closed curve. One defines that a point within one region represents an occupied bond, otherwise it is a vacant bond. Study of three different rules under this general formulation, indicates that the percolation threshold is always larger and varies continuously. This threshold has two limiting values, one is $p_c$(sq), the percolation threshold for the ordinary site percolation on the square lattice and the other being unity. The variation of the thresholds are characterized by exponents, which are not known in the literature. In a special case, all lattice sites are occupied by discs of random radii $R \in \{0,R_0\}$ and a percolation transition is observed with $R_0$ as the control variable, similar to the site occupation probability.
Intramolecular Torque, an Indicator of the Internal Rotation Direction of Rotor Molecules and Similar Systems
Creators: name: Zhang, Rui-Qin
name: Zhao, Yan-Ling
name: Qi, Fei
name: Hermann, Klaus
name: Van Hove, Michel A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Torque is ubiquitous in many molecular systems, including collisions, chemical reactions, vibrations, electronic excitations and especially rotor molecules. We present a straightforward theoretical method based on forces acting on atoms and obtained from atomistic quantum mechanics calculations, to quickly and qualitatively determine whether a molecule or sub-unit thereof has a tendency to rotation and, if so, around which axis and in which sense: clockwise or counterclockwise. The method also indicates which atoms, if any, are predominant in causing the rotation. Our computational approach can in general efficiently provide insights into the rotational ability of many molecules and help to theoretically screen or modify them in advance of experiments or before analyzing their rotational behavior in more detail with more extensive computations guided by the results from the torque approach. As an example, we demonstrate the effectiveness of the approach using a specific light-driven molecular rotary motor which was successfully synthesized and analyzed in prior experiments and simulations.
description: 11 pages, 4 figures, 1 SI file
The Justice Sector Reform and Access to Justice in the Addis Ababa City Government (AACG)
Creators: name: Yimer, Zerihun
Publisher: name: African Journal of Leadership and Development
Year: 2016

description: The City Council in AACG among its duties drafts and enacts legislations concerning municipal affairs and jurisdictions; establishes judicial bodies; and defines their powers and functions in accordance with the City Charter. Thus, the Addis Ababa City Charter creates two levels of City Courts of dealing with municipal jurisdictions. There is no Supreme Court in the Municipal Court System, although a cassation bench is included within the Appellate Court. Cassation review of Appellate Court decisions can be brought before the Federal Supreme Court. This court has also the power to decide on matters of jurisdictional conflicts between the City courts and Federal Courts. The court system in Addis Ababa City reflects a similar division as in between federal and state courts, except being at two levels. The courts are supposed to minimize the case load of the City Courts and the Federal Courts. This paper explores the Justice Sector Reform and Access to Justice in AACG. It mainly centers on the reforms made in the city courts and the Justice Bureau with their jurisdictions, structure, composition, and functions. Furthermore, cases are also analyzed so as to substantiate the study. The findings of the research revealed that there are considerable jurisdictional gaps and the two level court structure has an impact on the appeal right of citizens. Finally, the conclusions and recommendations in the study are supposed to improve the functioning of the Addis Ababa Justice Sector.
description: African Journal of Leadership and Development, Vol. 1 No. 1 (2016): Public Sector Reform Leadership
The candidate cluster and protocluster catalog (CCPC) II: Spectroscopically identified structures spanning 2 < z < 6.6
Creators: name: Franck, J. R.
name: McGaugh, S. S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The Candidate Cluster and Protocluster Catalog (CCPC) is a list of objects at redshifts z > 2 composed of galaxies with spectroscopically confirmed redshifts that are coincident on the sky and in redshift. These protoclusters are identified by searching for groups in volumes corresponding to the expected size of the most massive protoclusters at these redshifts. In CCPC1 we identified 43 candidate protoclusters among 14,000 galaxies between 2.74 < z < 3.71. Here we expand our search to more than 40,000 galaxies with spectroscopic redshifts z > 2.00, resulting in an additional 173 candidate structures. The most significant of these are 36 protoclusters with overdensities δ > 7. We also identify three large proto-supercluster candidates containing multiple protoclusters at z = 2.3, 3.5 and z = 6.56. Eight candidates with N > 10 or more galaxies are found at redshifts z > 4.0. The last system in the catalog is the most distant spectroscopic protocluster candidate known to date at z = 6.56.
description: Accepted in ApJ. 20 pages of main body text, followed by large Appendix of Tables and Figures (67 pages)
Identificazione e studio del ruolo dei miRNA nel processo infettivo della Leishmania
Creators: name: Valenza, Viviana
Publisher: name: INFN Open Access Repository
Year: 2022
Subjects: Leishmania
miRNA

description: Con il presente lavoro, ci si propone di comprendere il ruolo dei miRNA e il loro possibile coinvolgimento nella modulazione della risposta immunitaria in modelli cellulari macrofagici infettati con differenti specie di Leishmania. Inoltre, capire in quali pathway e quali geni vengono regolati dai miRNA identificati in questo studio permetterà a sua volta di identificare nuovi geni coinvolti nella risposta all’infezione. I risultati ottenuti dal presente studio permetteranno di condurre un'analisi dei miRNA che sono differenzialmente regolati durante l'infezione di Leishmania in modelli sperimentali in vitro, in grado di sovvertire la risposta immunitaria dell'ospite per comprenderne il loro coinvolgimento durante l'interazione ospite-parassita. Un ulteriore risultato sarà il sequenziamento, l’analisi dei dati e il deposito in GeneBank delle sequenze dei miRNA di Leishmania.
Properties of microlensing events by wide separation planets with a moon
Creators: name: Chung, Sun-Ju
name: Ryu, Yoon-Hyun
Publisher: name: arXiv
Year: 2016
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We investigate the properties of microlensing events caused by planetary systems where planets with a moon are widely separated from their host stars. From this investigation, we find that the moon feature generally appears as an very short-duration perturbation on the smooth asymmetric light curve of the lensing event induced by the wide separation planet; thus it can be easily discriminated from the planet feature responsible for the overall asymmetric light curve. For typical Galactic lensing events with the Einstein radius of $\sim 2$ AU, the asymmetry of the light curves due to bound planets can be noticed up to $\sim 20$AU. We also find that the perturbations of the wide planetary systems become dominated by the moon as the projected star-planet separation increases, and eventually the light curves of events produced by the systems appear as the single lensing light curve of the planet itself with a very short-duration perturbation induced by the moon, which is a representative light curve of the event induced by a star and a planet, except on the Einstein timescale of the planet. We also study the effect of a finite source star on the moon feature in the wide planetary lensing events. From this study, we find that when the lunar caustic is sufficiently separated from the planetary caustic, the lower limit on the ratio of the lunar caustic size to the source radius causing a $\geq 5\%$ lunar deviation depends mostly on the projected planet-moon separation regardless of the moon/star mass ratio, and it decreases as the planet-moon separation becomes smaller or larger than the planetary Einstein radius.
description: 16 pages, 10 figures, 1 table, accepted for publication in ApJ
SEROEPIDEMIOLOGICAL SCREENING OF LEISHMANIA INFECTION IN DOGS AND CATS: THE ROLE OF THE VETERINARIAN IN A HIGHLY ENDEMIC AREA IN SICILY
Creators: name: Gagliano Gino
name: Federica, Bruno
name: Castelli Germano
name: Fabrizio, Vitale
name: Valenza Viviana
Publisher: name: INFN Open Access Repository
Year: 2023
Subjects: Leishmania
SEROEPIDEMIOLOGICAL

description: Western Sicily is an active focus for canine and feline leishmaniosis in the Mediterranean area. The results of the present study indicate a high exposure rate to Leishmania (about 33% dogs and 44% cats result positive or suspected) in a random population, suggesting that they are infected with L. infantum. Moreover, 5 dogs and 1 cat previously classified as apparently healthy were seropositive with a titer ≥1:160. In conclusion, veterinary surveillance of dogs/cats could help to control the increase of L. infantum infections, especially in areas of high endemicity.
How to design a planetary system for different scattering outcomes: giant impact sweet spot, maximising exocomets, scattered disks
Creators: name: Wyatt, M. C.
name: Bonsor, A.
name: Jackson, A. P.
name: Marino, S.
name: Shannon, A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: This paper considers the dynamics of scattering of planetesimals or planetary embryos by a planet on a circumstellar orbit. We classify six regions in the planet's mass versus semimajor axis parameter space according to the dominant outcome for scattered objects: ejected, accreted, remaining, escaping, Oort Cloud, depleted Oort Cloud. We use these outcomes to consider which planetary system architectures maximise the observability of specific signatures, given that signatures should be detected first around systems with optimal architectures (if such systems exist in nature). Giant impact debris is most readily detectable for 0.1-10Mearth planets at 1-5au, depending on detection method and spectral type. While A stars have putative giant impact debris at 4-6au consistent with this sweet spot, that of FGK stars is typically <<1au contrary to expectations; an absence of 1-3au giant impact debris could indicate a low frequency of terrestrial planets there. Three principles maximise cometary influx from exo-Kuiper belts: a chain of closely separated planets interior to the belt, none of which is a Jupiter-like ejector; planet masses not increasing strongly with distance (for a net inward torque on comets); ongoing replenishment of comets, possibly by embedded low-mass planets. A high Oort Cloud comet influx requires no ejector and architectures that maximise the Oort Cloud population. Cold debris disks are usually considered classical Kuiper belt analogues. Here we consider the possibility of detecting scattered disk analogues, which could be betrayed by a broad radial profile and lack of small grains, as well as spherical 100-1000au mini-Oort Clouds. Some implications for escaping planets around young stars, detached planets akin to Sedna, and the formation of super-Earths, are also discussed.
description: 25 pages, MNRAS in press
Photothermal effects in ultra-precisely stabilized tunable microcavities
Creators: name: Brachmann, Johannes F. S.
name: Kaupp, Hanno
name: Hänsch, Theodor W.
name: Hunger, David
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We study the mechanical stability of a tunable high-finesse microcavity under ambient conditions and investigate light-induced effects that can both suppress and excite mechanical fluctuations. As an enabling step, we demonstrate the ultra-precise electronic stabilization of a microcavity. We then show that photothermal mirror expansion can provide high-bandwidth feedback and improve cavity stability by almost two orders of magnitude. At high intracavity power, we observe self-oscillations of mechanical resonances of the cavity. We explain the observations by a dynamic photothermal instability, leading to parametric driving of mechanical motion. For an optimized combination of electronic and photothermal stabilization, we achieve a feedback bandwidth of $500\,$kHz and a noise level of $1.1 \times 10^{-13}\,$m rms.
Zonal-mean circulation response to reduced air-sea momentum roughness
Creators: name: Polichtchouk, I.
name: Shepherd, T. G.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Physical sciences

description: The impact of uncertainties in surface layer physics on the atmospheric general circulation is comparatively unexplored. Here the sensitivity of the zonal-mean circulation to reduced air-sea momentum roughness ($Z_{0m}$) at low flow speed is investigated with the Community Atmosphere Model (CAM3). In an aquaplanet framework with prescribed sea surface temperatures, the response to reduced $Z_{0m}$ resembles the La Ni$\tilde{\text{n}}$a minus El Ni$\tilde{\text{n}}$o response to El Ni$\tilde{\text{n}}$o Southern Oscillation variability with: i) a poleward shift of the mid-latitude westerlies extending all the way to the surface; ii) a weak poleward shift of the subtropical descent region; and iii) a weakening of the Hadley circulation, which is generally also accompanied by a poleward shift of the inter-tropical convergence zone (ITCZ) and the tropical surface easterlies. Mechanism-denial experiments show this response to be initiated by the reduction of tropical latent and sensible heat fluxes, effected by reducing $Z_{0m}$. The circulation response is elucidated by considering the effect of the tropical energy fluxes on the Hadley circulation strength, the upper tropospheric critical layer latitudes, and the lower-tropospheric baroclinic eddy forcing. The ITCZ shift is understood via moist static energy budget analysis in the tropics. The circulation response to reduced $Z_{0m}$ carries over to more complex setups with seasonal cycle, full complexity of atmosphere-ice-land-ocean interaction, and a slab ocean lower boundary condition. Hence, relatively small changes in the surface parameterization parameters can lead to a significant circulation response.
description: 13 pages, 15 figures, accepted for publication in QJRMS
Rectification and non-Gaussian diffusion in heterogeneous media
Creators: name: Malgaretti, Paolo
name: Rubi, Ignacio Pagonabarraga Miguel J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We show that when Brownian motion takes place in a heterogeneous medium, the presence of local forces and transport coefficients leads to deviations from a Gaussian probability distribution that make that the ratio between forward and backward probabilities depends on the nature of the host medium, on local forces and also on time. We have applied our results to two situations: diffusion in a disordered medium and diffusion in a confined system. For such scenarios we have shown that our theoretical predictions are in very good agreement with numerical results. Moreover we have shown that the deviations from the Gaussian solution lead to the onset of rectification. Our predictions could be used to detect the presence of local forces and to characterize the intrinsic short-scale properties of the host medium, a problem of current interest in the study of micro and nano-systems.
Flavor Universal Resonances and Warped Gravity
Creators: name: Agashe, Kaustubh
name: Du, Peizhi
name: Hong, Sungwoo
name: Sundrum, Raman
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Warped higher-dimensional compactifications with "bulk" standard model, or their AdS/CFT dual as the purely 4D scenario of Higgs compositeness and partial compositeness, offer an elegant approach to resolving the electroweak hierarchy problem as well as the origins of flavor structure. However, low-energy electroweak/flavor/CP constraints and the absence of non-standard physics at LHC Run 1 suggest that a "little hierarchy problem" remains, and that the new physics underlying naturalness may lie out of LHC reach. Assuming this to be the case, we show that there is a simple and natural extension of the minimal warped model in the Randall-Sundrum framework, in which matter, gauge and gravitational fields propagate modestly different degrees into the IR of the warped dimension, resulting in rich and striking consequences for the LHC (and beyond). The LHC-accessible part of the new physics is AdS/CFT dual to the mechanism of "vectorlike confinement", with TeV-scale Kaluza-Klein excitations of the gauge and gravitational fields dual to spin-0,1,2 composites. Unlike the minimal warped model, these low-lying excitations have predominantly flavor-blind and flavor/CP-safe interactions with the standard model. Remarkably, this scenario also predicts small deviations from flavor-blindness originating from virtual effects of Higgs/top compositeness at $\sim O(10)$ TeV, with subdominant resonance decays into Higgs/top-rich final states, giving the LHC an early "preview" of the nature of the resolution of the hierarchy problem. Discoveries of this type at LHC Run 2 would thereby anticipate (and set a target for) even more explicit explorations of Higgs compositeness at a 100 TeV collider, or for next-generation flavor tests.
description: 43 pages, 10 figures
The Coupled Physical Structure of Gas and Dust in the IM Lup Protoplanetary Disk
Creators: name: Cleeves, L. Ilsedore
name: Öberg, Karin I.
name: Wilner, David J.
name: Huang, Jane
name: Loomis, Ryan A.
name: Andrews, Sean M.
name: Czekala, Ian
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The spatial distribution of gas and solids in protoplanetary disks determines the composition and formation efficiency of planetary systems. A number of disks show starkly different distributions for the gas and small grains compared to millimeter-centimeter sized dust. We present new Atacama Large Millimeter/Submillimeter Array (ALMA) observations of the dust continuum, CO, $^{13}$CO, and C$^{18}$O in the IM Lup protoplanetary disk, one of the first systems where this dust-gas dichotomy was clearly seen. The $^{12}$CO is detected out to a radius of 970 AU, while the millimeter continuum emission is truncated at just 313 AU. Based upon this data, we have built a comprehensive physical and chemical model for the disk structure, which takes into account the complex, coupled nature of the gas and dust and the interplay between the local and external environment. We constrain the distributions of gas and dust, the gas temperatures, the CO abundances, the CO optical depths, and the incident external radiation field. We find that the reduction/removal of dust from the outer disk exposes this region to higher stellar and external radiation and decreases the rate of freeze-out, allowing CO to remain in the gas out to large radial distances. We estimate a gas-phase CO abundance of $5\%$ of the ISM value and a low external radiation field ($G_0\lesssim4$). The latter is consistent with that expected from the local stellar population. We additionally find tentative evidence for ring-like continuum substructure, suggestions of isotope-selective photodissociation, and a diffuse gas halo.
description: 19 pages, 16 figures, accepted to ApJ
Circulator based on spoof surface plasmon polaritons
Creators: name: Qiu, Tianshuo
name: Wang, Jiafu
name: Li, Yongfeng
name: Qu, Shaobo
Publisher: name: arXiv
Year: 2016
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Circulators based on spoof surface plasmon polaritons are designed and analyzed. In the letter, we use blade structure to realize the propagation of SSPPs wave and a matching transition is used to feed energy from coplanar waveguide to the SSPPs. And the circulator shows good nonreciprocal transmission characteristics. The simulation results indicate that in the frequency band from 5 to 6.6 GHz, the isolation degree and return loss basically reaches 15dB and the insertion loss is less than 0.5dB. Moreover, the use of confinement electromagnetic waves can decrease the size of the ferrite and show a broadband characteristic.
description: 3 pages, 6 figures, submitted to IEEE antennas and wireless propagation letters on 27-Mar-2016
Life after eruption - VI. Recovery of the old novae EL Aql, V606 Aql, V908 Oph, V1149 Sgr, V1583 Sgr and V3964 Sgr
Creators: name: Tappert, C.
name: Barria, D.
name: Morales, I. Fuentes
name: Vogt, N.
name: Ederoclite, A.
name: Schmidtobreick, L.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We report on the recovery of the six old novae EL Aql, V606 Aql, V908 Oph, V1149 Sgr, V1583 Sgr and V3964 Sgr, using photometric and spectroscopic data. Analysing several properties, we find that EL Aql is a good candidate for an intermediate polar. Furthermore, the system inclination of EL Aql, V606 Aql, V1583 Sgr and V3964 Sgr appears to be sufficiently high to suggest them as good targets for time series observations. We also eliminate some previously suggested candidates for the post-novae V1301 Aql and V1151 Sgr.
description: 11 pages, 10 figures (reduced in resolution), accepted by MNRAS; proofread and corrected (apart from some nitpicky stuff in the references)
On radiative acceleration in spine-sheath structured blazar jets
Creators: name: Chhotray, Atul
name: Nappo, Francesco
name: Ghisellini, Gabriele
name: Salafia, Om Sharan
name: Tavecchio, Fabrizio
name: Lazzati, Davide
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: It has been proposed that blazar jets are structured, with a fast spine surrounded by a slower sheath or layer. This structured jet model explains some properties of their emission and morphology. Because of their relative motion, the radiation produced by one component is seen amplified by the other, thus enhancing the inverse Compton emission of both. Radiation is emitted anisotropically in the comoving frames, and causes the emitting plasma to recoil. As seen in the observer frame, this corresponds to a deceleration of the fastest component (the spine) and an acceleration of the slower one (the layer). While the deceleration of the spine has already been investigated, here we study for the first time the acceleration of the sheath and find self-consistent velocity profile solutions for both the spine and the sheath while accounting for radiative cooling. We find that the sheath can be accelerated to the velocities required by the observations if its leptons remain energetic in the acceleration region, assumed to be of the order of 100 Schwarzschild radii, demanding continuous injection of energetic particles in that region.
description: 14 pages, 16 figures, submitted to MNRAS. Comments are welcome!
High-frequency, scaled MoS2 transistors
Creators: name: Krasnozhon, Daria
name: Dutta, Subhojit
name: Nyffeler, Clemens
name: Leblebici, Yusuf
name: Kis, Andras
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The interest in MoS2 for radio-frequency (RF) application has recently increased. However, little is known on the scaling behavior of transistors made from MoS2 for RF applications, which is important for establishing performance limits for electronic circuits based on 2D semiconductors on flexible and rigid substrates. Here, we present a systematic study of top-gated trilayer MoS2 RF transistors with gate lengths scaled down to 70 and 40 nm. In addition, by introducing edge-contacted injection of electrons in trilayer MoS2 devices, we decrease the contact resistance and as a result obtain the highest cutoff frequency of 6 GHz before the de-embedding procedure and 25 GHz after the de-embedding procedure.
description: in Electron Devices Meeting (IEDM), 2015 IEEE International
Octave-spanning supercontinuum generation in a silicon-rich nitride waveguide
Creators: name: Liu, Xing
name: Pu, Minhao
name: Zhou, Binbin
name: Krückel, Clemens J.
name: Fülöp, Attila
name: Torres-Company, Victor
name: Bache, Morten
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We experimentally show octave-spanning supercontinuum generation in a non-stoichiometric silicon-rich nitride waveguide when pumped by femtosecond pulses from an erbium fiber laser. The pulse energy and bandwidth are comparable to results achieved in stoichiometric silicon nitride waveguides, but our material platform is simpler to manufacture. We also observe wave-breaking supercontinuum generation by using orthogonal pumping in the same waveguide. Additional analysis reveals that the waveguide height is a powerful tuning parameter for generating mid-infrared dispersive waves while keeping the pump in the telecom band.
description: Accepted for OL, https://www.osapublishing.org/ol/upcoming_pdf.cfm?id=263052
Counterterm method in dilaton gravity and the critical behavior of dilaton black holes with power-Maxwell field
Creators: name: Dayyani, Z.
name: Sheykhi, A.
name: Dehghani, M. H.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate the critical behavior of an $(n+1)$-dimensional topological dilaton black holes, in an extended phase space in both canonical and grand-canonical ensembles, when the gauge field is in the form of power-Maxwell field. In order to do this we introduce for the first time the counterterms that remove the divergences of the action in dilaton gravity for the solutions with curved boundary. Using the counterterm method, we calculate the conserved quantities and the action and therefore Gibbs free energy in both the canonical and grand-canonical ensembles. We treat the cosmological constant as a thermodynamic pressure, and its conjugate quantity as a thermodynamic volume. In the presence of power-Maxwell field, we find an analogy between the topological dilaton black holes with van der Walls liquid-gas system in all dimensions provided the dilaton coupling constant $α$ and the power parameter $p$ are chosen properly. Interestingly enough, we observe that the power-Maxwell dilaton black holes admit the phase transition in both canonical and grand-canonical ensembles. This is in contrast to RN-AdS, Einstein-Maxwell-dilaton and Born-Infeld-dilaton black holes, which only admit the phase transition in the canonical ensemble. Besides, we calculate the critical quantities and show that they depend on $α$, $n$ and $p$. Finally, we obtain the critical exponents in two ensembles and show that they are independent of the model parameters and have the same values as mean field theory.
description: 19 pages, 18 figures
Introduction to Focus Issue: Patterns of Network Synchronization
Creators: name: Abrams, Daniel M.
name: Pecora, Louis M.
name: Motter, Adilson E.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Chaotic Dynamics (nlin.CD)
subject: Pattern Formation and Solitons (nlin.PS)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: The study of synchronization of coupled systems is currently undergoing a major surge fueled by recent discoveries of new forms of collective dynamics and the development of techniques to characterize a myriad of new patterns of network synchronization. This includes chimera states, phenomena determined by symmetry, remote synchronization, and asymmetry-induced synchronization. This Focus Issue presents a selection of contributions at the forefront of these developments, to which this introduction is intended to offer an up-to-date foundation.
description: 15 pages, 1 figure
title: Taking it inter-personal: a multilevel study of the mediating role of team interpersonal processes on the relationships Between Team Functional Leadership and Employee Engagement
Creators: name: Suganda, Wendy Cahya
Publisher: name: University of Reading
Year: 2025

description: Employee engagement has attracted research interest as it is linked to improved performance and improved wellbeing. However, although most organisations are structured upon teams, the role of work teams in promoting employee engagement has often been overlooked. Likewise, employee engagement has received little attention in work teams literature. To address this research gap, this study draws on a multilevel perspective and work team literature and examines how team functional leadership and team interpersonal processes influence employee engagement at the team and individual levels. This multilevel study uses multisource cross-sectional data from 583 employees nested in 72 teams in an Indonesian supermarket chain and analyses the data using multilevel structural equation modelling. The team-level mediation analyses show that team interpersonal processes fully mediate the effect of team functional leadership on team work engagement, and team work engagement fully mediates the effect of team interpersonal processes on team performance. The cross-level mediation analyses demonstrate that team interpersonal processes and team functional leadership indirectly influence personal engagement through the mediational role of team work engagement. However, neither psychological meaningfulness, safety, nor availability is found to mediate the effect of team interpersonal processes on personal engagement. This study contributes to theory in several ways. First, it draws a further link between employee engagement and work teams literature by emphasising the significance of maintaining a high quality of team interpersonal processes in promoting team and individual engagement. Second, this study contributes to the team leadership literature by demonstrating how team leaders can enhance their team’s engagement by executing their leadership functions. Third, this multilevel study shed further light on the process of how engagement spread across the team members. The study contributes to practice by highlighting the importance of monitoring team interpersonal processes and team work engagement. It also underlines the benefit of partnering with the unit team leaders in promoting engagement within the organisation. This team-based approach can be particularly useful for job contexts that offer limited intrinsic rewards.
Particle-number conserving analysis of the high-spin structure of $^{159}$Ho
Creators: name: Zhang, Zhen-Hua
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The high-spin rotational bands in odd-$Z$ nuclei $^{159}$Ho ($Z=67$) are investigated using the cranked shell model with the pairing correlations treated by a particle-number conserving method, in which the blocking effects are taken into account exactly. The experimental moments of inertia and alignments and their variations with the rotational frequency $\hbarω$ are reproduced very well by the calculations. The splitting between the signature partners of the yrast band $7/2^-[523]$ is discussed and the splitting of the excited band $7/2^+[404]$ above $\hbarω\sim 0.30$~MeV is predicted due to the level crossing with $1/2^+[411]$. The calculated $B(E2)$ transition probabilities are also suggested for future experiments.
description: 20 pages, 7 figures, 1 table
L’ostéoporose masculine : du dépistage au traitement
Creators: name: Bengana, Bilal
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 320223
subject: Rheumatology and arthritis

description: L'ostéoporose masculine dont le diagnostic est souvent négligé, impose plus de considération et une conduite adaptée pour un dépistage bien codifié et une prise en charge efficiente. Cette entité reste sous-estimée et souvent sous-traitée, du fait du manque de prospection, alors que le diagnostic est souvent posé tardivement, après la survenue de la fracture. Les lignes directrices de dépistage et de prise en charge sont superposées à celles des femmes, à cause de la rareté des essais cliniques randomisés et la faible taille des échantillons dans les études, par rapport à celles menée chez les femmes. En effet, la plupart de nos connaissances sur l'ostéoporose masculine, notamment les traitements utilisés, sont extrapolées à partir de données récoltées chez les femmes. Dans cet exposé, on s’intéressera à mettre en évidence la conduite à prendre devant des sujets masculins avec le diagnostic de fragilité osseuse mais aussi apprendre à identifier les sujets à risque de survenue de fractures et exposer les différentes thérapeutiques indiquées dans leur prise en charge.
KOI-1003: A new spotted, eclipsing RS CVn binary in the Kepler field
Creators: name: Roettenbacher, Rachael M.
name: Kane, Stephen R.
name: Monnier, John D.
name: Harmon, Robert O.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Using the high-precision photometry from the Kepler space telescope, thousands of stars with stellar and planetary companions have been observed. The characterization of stars with companions is not always straightforward and can be contaminated by systematic and stellar influences on the light curves. Here, through a detailed analysis of starspots and eclipses, we identify KOI-1003 as a new, active RS CVn star---the first identified with data from Kepler. The Kepler light curve of this close binary system exhibits the system's primary transit, secondary eclipse, and starspot evolution of two persistent active longitudes. The near equality of the system's orbital and rotation periods indicates the orbit and primary star's rotation are nearly synchronized ($P_\mathrm{orb} = 8.360613\pm0.000003$ days; $P_\mathrm{rot} \sim 8.23$ days). By assuming the secondary star is on the main sequence, we suggest the system consists of a $1.45^{+0.11}_{-0.19} \ M_\odot$ subgiant primary and a $0.59^{+0.03}_{-0.04} \ M_\odot$ main-sequence companion. Our work gives a distance of $4400 \pm 600$ pc and an age of $t = 3.0^{-0.5}_{+2.0}$ Gyr, parameters which are discrepant with previous studies that included the star as a member of the open cluster NGC 6791.
description: 21 pages, 19 figures, accepted to ApJ
Linear spectropolarimetry of polarimetric standard stars with VLT/FORS2
Creators: name: Cikota, Aleksandar
name: Patat, Ferdinando
name: Cikota, Stefan
name: Faran, Tamar
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We reduced ESO's archival linear spectropolarimetry data (4000-9000Å) of 6 highly polarized and 8 unpolarized standard stars observed between 2010 and 2016, for a total of 70 epochs, with the FOcal Reducer and low dispersion Spectrograph (FORS2) mounted at the Very Large Telescope. We provide very accurate standard stars polarization measurements as a function of wavelength, and test the performance of the spectropolarimetric mode (PMOS) of FORS2. We used the unpolarized stars to test the time stability of the PMOS mode, and found a small ($\leq$0.1%), but statistically significant, on-axis instrumental polarization wavelength dependency, possibly caused by the tilted surfaces of the dispersive element. The polarization degree and angle are found to be stable at the level of $\leq$0.1% and $\leq$0.2 degrees, respectively. We derived the polarization wavelength dependence of the polarized standard stars and found that, in general, the results are consistent with those reported in the literature, e.g. Fossati et al. (2007) who performed a similar analysis using FORS1 data. The re-calibrated data provide a very accurate set of standards that can be very reliably used for technical and scientific purposes. The analysis of the Serkowski parameters revealed a systematic deviation from the width parameter $K$ reported by Whittet et al. (1992). This is most likely explained by incorrect effective wavelengths adopted in that study for the R and I bands.
description: 12 pages, 10 figures, accepted for publication in MNRAS
Investigation of the two-quasiparticle bands in the doubly-odd nucleus $^{166}$Ta using a particle-number conserving cranked shell model
Creators: name: Zhang, Zhen-Hua
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The high-spin rotational properties of two-quasiparticle bands in the doubly-odd ${}^{166}$Ta are analyzed using the cranked shell model with pairing correlations treated by a particle-number conserving method, in which the blocking effects are taken into account exactly. The experimental moments of inertia and alignments and their variations with the rotational frequency $\hbarω$ are reproduced very well by the particle-number conserving calculations, which provides a reliable support to the configuration assignments in previous works for these bands. The backbendings in these two-quasiparticle bands are analyzed by the calculated occupation probabilities and the contributions of each orbital to the total angular momentum alignments. The moments of inertia and alignments for the Gallagher-Moszkowski partners of these observed two-quasiparticle rotational bands are also predicted.
description: 7 pages, 5 figures. arXiv admin note: text overlap with arXiv:1606.00570
Visual Notes from the Gathering for Open Science Hardware 2022
Creators: name: Cooke-Tapia, Ian
name: Styles, Hannah
Publisher: name: Zenodo
Year: 2023
Subjects: visual notes, open science hardware, gathering for open science hardware, illustrated science, accessibility design

description: A summary of conversations, talks and ideas witnessed by Ian Cooke-Tapia during the 2022 Gathering for Open Science Hardware in Panama City, Panama.
Improving the atmospheric correction algorithms for sea surface skin temperature retrievals from MODIS using machine learning methods
Creators: name: Luo, Bingkun
Publisher: name: Zenodo
Year: 2022

description: Short abstract Satellite retrievals of sea surface skin temperature (SSTskin) have become necessary for many near-real time applications. The missions of the two MODISs have provided continuous measurements for more than twenty years and have played a significant role in generating time series of quantitative estimates of SSTskin. This study used four machine learning approaches: eXtreme Gradient Boosting (XGBoost), support vector machines (SVM), random forests (RF), and artificial neural networks (ANN), to develop improved atmospheric correction algorithms for satellite-derived SSTskin in the Caribbean region. A set of satellite and in-situ measurements, including SST, the atmospheric state and surface radiation, taken on research cruises, from surface moorings and drifting buoys was used to train the machine learning models. Finally, the reliability and shortcomings of various machine learning methods were assessed through comparisons with SSTskin derived from shipboard and other in situ measurements. Overall comparisons show encouraging results: the biases of various machine learning approaches vary between -0.076 K to 0.013 K; with the XGBoost showing the best correlation in a statistical analysis of in situ SST measurements. This study contributes to improving our understanding of the key environmental properties and will reduce uncertainty in earth science and climate research.
Roughness tolerances for Cherenkov telescope mirrors
Creators: name: Tayabaly, K.
name: Spiga, D.
name: Canestrari, R.
name: Bonnoli, G.
name: Lavagna, M.
name: Pareschi, G.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The Cherenkov Telescope Array (CTA) is a forthcoming international ground-based observatory for very high-energy gamma rays. Its goal is to reach sensitivity five to ten times better than existing Cherenkov telescopes such as VERITAS, H.E.S.S. or MAGIC and extend the range of observation to energies down to few tens of GeV and beyond 100 TeV. To achieve this goal, an array of about 100 telescopes is required, meaning a total reflective surface of several thousands of square meters. Thence, the optimal technology used for CTA mirrors manufacture should be both low-cost (~1000 euros/m2) and allow high optical performances over the 300-550 nm wavelength range. More exactly, a reflectivity higher than 85% and a PSF (Point Spread Function) diameter smaller than 1 mrad. Surface roughness can significantly contribute to PSF broadening and limit telescope performances. Fortunately, manufacturing techniques for mirrors are now available to keep the optical scattering well below the geometrically-predictable effect of figure errors. This paper determines first order surface finish tolerances based on a surface microroughness characterization campaign, using Phase Shift Interferometry. That allows us to compute the roughness contribution to Cherenkov telescope PSF. This study is performed for diverse mirror candidates (MAGIC-I and II, ASTRI, MST) varying in manufacture technologies, selected coating materials and taking into account the degradation over time due to environmental hazards.
description: Preprint version. The fully published paper can be found at https://doi.org/10.1117/12.2187025
Shape dependence and anisotropic finite-size scaling of the phase coherence of three-dimensional Bose-Einstein condensed gases
Creators: name: Ceccarelli, Giacomo
name: Delfino, Francesco
name: Mesiti, Michele
name: Vicari, Ettore
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We investigate the equilibrium phase-coherence properties of Bose-condensed particle systems, focusing on their shape dependence and finite-size scaling (FSS). We consider three-dimensional (3D) homogeneous systems confined to anisotropic L x L x L_a boxes, below the BEC transition temperature $T_c$. We show that the phase correlations develop peculiar anisotropic FSS for any $T>1, are characterized by a coherence length ξ_a \sim A_t ρ_s/T where A_t is the transverse area and ρ_s is the superfluid density.
description: 7 pages
Extrinsic size effect of pyroelectric response of ferroelectric films
Creators: name: Eliseev, Eugene A.
name: Morozovsky, Nicholas V.
name: Yelisieiev, Mykola Ye.
name: Morozovska, Anna N.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We developed a theoretical model for the calculation of the main characteristics of pyroelectric response of pyroactive multilayer structures, which are basic elements of modern pyroelectric detectors of radiation and other transducers. In the framework of the proposed model, the dependences of the pyroelectric response frequency spectra on the ferroelectric film thickness have been investigated. It was found that a pronounced extrinsic size effect is inherent to the pyroelectric response frequency spectra, such as the strong thickness dependence of the response maximal value and its frequency position. Thickness dependences of the frequency position of the pyroelectric response maximum and the optimal thickness of the pyroactive ferroelectric film are calculated. The frequency spectra of the pyroelectric current and voltage calculated theoretically are in quantitative agreement with experimental ones for Al/P(VDF-TrFE)/Ti/Si pyroactive structure. Developed procedure is important for improving the sensitivity of pyroelectric devices. Obtained analytical expressions allow us to optimize the performances of pyroactive elements using the existence of the size effect, which depend on pyroactive layer and substrate thicknesses, as well as on the conditions of heat transfer and exchange at corresponding boundaries of the pyroactive structure.
description: 22 pages, 7 figures, 1 Appendix