cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Stabilization of product states and excited-state quantum phase transitions in a coupled qubit-field system
Creators: name: Stránský, Pavel
name: Cejnar, Pavel
name: Filip, Radim
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study a system of a single qubit (or a few qubits) interacting with a soft-mode bosonic field. Considering an extended version of the Rabi model with both parity-conserving and parity-violating interactions, we disclose a complex arrangement of quantum phase transitions in the ground- and excited-state domains. An experimentally testable signature of some of these transitions is a dynamical stabilization of a fully factorized qubit-field state involving the field vacuum. It happens in the ultrastrong coupling regime where the superradiant field equilibrium is far from the vacuum state. The degree of stabilization varies abruptly with interaction parameters and increases with the softness of the field mode. We analyze semiclassical origins of these effects and show their connection to various forms of excited-state quantum phase transitions.
description: 16 pages, 9 figures
Deumidificazione per adsorbimento: valutazione delle prestazioni di impianti di climatizzazione ibridi con ruota essiccante
Creators: name: Palma, Daniele
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2004

description: Nella presente tesi sono dapprima illustrati i principi della deumidificazione (capp.1 e 2), dopodiché vengono descritte le caratteristiche di funzionamento delle ruote essiccanti e dei sistemi di condizionamento basati su questa apparecchiatura (capp.3 e 4). Infine, dopo aver illustrato le potenzialità dei programmi di calcolo utilizzati per le simulazioni (cap.5) si espongono i risultati dei casi studio affrontati (cap.6).
In particolare, le applicazioni considerate in questa tesi sono state:
-	ambiente a destinazione d’uso commerciale di dimensioni ridotte (superficie di 400-1000 m2);
-	teatro (superficie di circa 1200 m2);
-	supermercato (superficie di circa 3700 m2).
Per il calcolo dei costi di esercizio si sono utilizzati tre programmi di calcolo, due dei quali (PowerDOE e DesiCalc) si basano sul motore di calcolo rappresentato dal DOE-2, mentre il terzo (DTPE) è un programma più semplificato, autonomamente sviluppato, basato sulla suddivisione del diagramma psicrometrico in zone, ad ognuna delle quali corrisponde un diverso trattamento dell’aria.
Role of Frustration and Dimensionality in the Hubbard Model on the Stacked Square Lattice: Variational Cluster Approach
Creators: name: Yoshikawa, Toshihiko
name: Ogata, Masao
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Using variational cluster approach, we study influence of frustration and dimensionality on magnetic properties in the ground state of Hubbard model on a stacked square lattice in the large $U$ region (U/t=10), by changing the next-nearest-neighbor hopping, $t^{\prime}$, and the interlayer hopping, $t_{\perp}$. For small $t_{\perp}t^{\prime}_{c_{2}}$. They are separated by a paramagnetic Mott insulating state which appears in the parameter region $t^{\prime}_{c_{1}}t^{\ast}_{\perp}$, the paramagnetic Mott insulating state disappears and a direct transition between antiferromagnetic state and collinear magnetic state occurs at $t^{\prime}=t^{\prime}_{c_{3}}$. We also find that the transition from the antiferromagnetic state to the paramagnetic Mott insulating state is of the second-order and that from the collinear magnetic state to the paramagnetic Mott insulating or the antiferromagnetic state is of the first-order.
description: 7 pages, 6 figures, submitted to Physical Review B
Are There Any Redshift >8 Gamma-Ray Bursts in the BATSE Catalog?
Creators: name: Ashcraft, Teresa
name: Schaefer, Bradley E.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Several luminosity indicators have been found for Gamma-Ray Bursts (GRBs) wherein measurable light curve and spectral properties are well-correlated with the peak luminosity. Several papers have each applied one different luminosity relation to find redshifts for BATSE GRBs and claim to identify specific bursts with z>8. The existence of such high redshift events is not surprising, as BATSE has enough sensitivity to see them and GRBs are expected out to the redshift of the first star formation. To improve results we used five luminosity relations with updated calibrations to determine redshifts with error bars. Combining these relations, we calculated the redshifts of 36 BATSE GRBs with claimed z>8. Our results include 13 bursts with our derived best redshift z_best>8, which looks promising at first. But the calculated redshift uncertainties are significantly large in these selected cases. With only one exception, all of our bursts have z_1siglow<9. The one exception (BATSE trigger 2035) is likely a short duration burst at z>~4. Our best case for a very high redshift event is BATSE trigger 3142 with z_best>20 and z_1siglow=8.9, however we can only say z>4.1 at the two-sigma confidence level. In all, we cannot point toward any one BATSE burst as confidently having z>8. One implication is to greatly weaken prior claims that GRBs have a steeply rising rate-density out to high redshifts.
description: ApJ in press, 18 pages
The Littlewood--Paley--Rubio de Francia property of a Banach space for the case of equal intervals
Creators: name: Hytönen, T. P.
name: Torrea, J. L.
name: Yakubovich, D. V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 42Bxx, 46B20

description: Let $X$ be a Banach space. It is proved that an analogue of the Rubio de Francia square function estimate for partial sums of the Fourier series of $X$-valued functions holds true for all disjoint collections of subintervals of the set of integers of equal length and for all exponents $p$ greater or equal than 2 if and only if the space $X$ is a UMD space of type 2. The same criterion is obtained for the case of subintervals of the real line and Fourier integrals instead of Fourier series.
description: To appear in The Royal Society of Edinburgh Proc. A (Mathematics)
Development of an Efficient Poultry Management System
Creators: name: Obinge, Shadrack Marimbu
Publisher: name: Zenodo
Year: 2022

description: The majority of people in the most underdeveloped tropical areas rely heavily on chicken farming as their main source of protein. However, the tough environmental circumstances in these areas make it difficult to produce poultry, which lowers the daily protein intake. The sources of heat generation in a poultry house should be carefully observed in order to understand how heat stress affects birds. This will help manage the heat stress situation in this area. The inside climatic conditions of the poultry houses are discussed in this work, as well as how the birds react to them and any consequences for heat control in chicken production. As a result, it offers useful information for guidelines on open poultry house architectural design factors that enable the best climatic conditions to reduce the problem of heat stress in poultry production in a hot and humid climate. Low profit yield and low return on investment may result from chicken farms in the tropics having prohibitive production costs and arduous human participation. Unfortunately, excessive human engagement in poultry feeding systems can result in disease outbreaks, excessive wear and tear, and bird malnutrition. This research was motivated by the shortcomings in the inadequate bird feeding system, and a conveyor feeder is to be created as a result. The poultry attendants' workload is reduced by this system. The method of feeding poultry must be carefully considered because chicken must be fed on a regular basis in order to be productive. The traditional method of feeding poultry necessitates continuous feeding and an increase in human labor to ensure the poultry is fed at the appropriate time. The goal of this project is to automatically feed poultry at a predetermined time and to notify the user when the feed supply is depleted. To distribute food, the main concept in this project is a line-following conveyor. This conveyor feeder is powered by a dc motor, which also powers the conveyor. As a result, the proposed method is more efficient than the traditional manual method of feeding because it requires less effort and wastes fewer feeds. The detailed design of the conveyor feeder is described in this work, and preliminary experiments to demonstrate the usefulness of the proposed system and generate a better return on investment in a deep litter poultry farming system are reported. This paper also includes the design of a poultry waste disposal conveyor system. This system is made up of a conveyor and a motor. Waste disposal is required to improve hygiene. The development of a conveyor roof is also part of this management system. The main theme of this project is to allow sunlight into a poultry house into a poultry house. And this proposed method is simpler in design and low cost to construct than its previous versions.
Simulations of light scalar mesons on the lattice and related difficulties
Creators: name: Prelovsek, Sasa
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: I review the lattice simulations of light scalar mesons with quark-antiquark and tetraquark interpolating fields. Several difficulties which complicate the extraction of scalar meson masses from the scalar correlators are pointed out. One of the major difficulties is the presence of the two-pseudoscalar scattering states, which often dominate the correlator at light quark masses. In the simulations with unphysical approximations such scattering contributions are even more disturbing since they are often large and sometimes negative. Techniques which allow extraction of scalar meson masses in presence of scattering states are listed. Preliminary results of various lattice collaborations are presented.
description: Talk presented at workshop "Scalar mesons and Related Topics" (SCADRON70), Lisbon, Portugal, February 2008
ROXA: a new multi-frequency selected large sample of blazars with SDSS and 2dF optical spectroscopy
Creators: name: Turriziani, S.
name: Cavazzuti, E.
name: Giommi, P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Context. Although Blazars are a small fraction of the overall AGN population they are expected to be the dominant population of extragalactic sources in the hard X-ray and gamma-ray bands and have been shown to be the largest contaminant of CMB fluctuation maps. So far the number of known blazars is of the order of several hundreds, but the forthcoming AGILE, GLAST and Planck space observatories will detect several thousand of objects of this type. Aims. In preparation for these missions it is necessary to identify new samples of blazars to study their multi-frequency characteristics and statistical properties. Methods. We compiled a sample of objects with blazar-like properties via a cross-correlation between large radio (NVSS, ATCAPMN) and X- ray surveys (RASS) using the SDSS-DR4 and 2dF survey data to spectroscopically identify our candidates and test the validity of the selection method. Results. We present the Radio - Optical - X-ray catalog built at ASDC (ROXA), a list of 816 objects among which 510 are confirmed blazars. Only 19% of the candidates turned out to be certainly non-blazars demonstrating the high efficiency of our selection method. Conclusions. Our catalog includes 173 new blazar identifications, or about 10% of all presently known blazars. The relatively high flux threshold in the X-ray energy band (given by the RASS survey) preferentially selects objects with high fx / fr ratio leading to the discovery of new High Energy Peaked BL Lac (HBLs). Our catalog therefore includes many new potential targets for GeV-TeV observations.
description: 19 pages, 3 figure, 2 tables
The treatment acceptability of a behavioral parent training program and its components
Creators: name: Calvert, Susan Cross
Publisher: name: University of British Columbia
Year: 2010

description: Treatment acceptability research has typically examined the acceptability of single isolated procedures rather than a comprehensive program of integrated procedures designed to deal with a problematic behavior. One such program developed to treat child noncompliance and other conduct-disordered behaviors is the Forehand-McMahon parent training program (1981). This program has been extensively evaluated and its effectiveness, generalizability, and social validity have been documented in numerous investigations (see McMahon & Forehand, 1984, for a review). In this study, the treatment acceptability of the Forehand-McMahon parent training program (1981) was evaluated in terms of its five individual parenting skills (attends, rewards, ignoring, commands, time out), three methods of introducing each new skill to the child (presenting a rationale, presenting a rationale and modeling its use, or no rationale or modeling), and the program as an entity. Ninety nonreferred mothers of 3- to 8-year old children were presented with written descriptions of the Forehand-McMahon parent training program as it would be applied to a typical clinic-referred family. Subjects were randomly assigned to one of three groups by way of the written descriptions they received. These descriptions varied only in the method of introducing each new skill to the child. Subjects evaluated each of the individual parenting skills, the teaching method, and the overall program by way of the Treatment Evaluation Inventory (Kazdin, 1980a; 1980b) and the usefulness/difficulty measures of the Parent's Consumer Satisfaction Questionnaire (Forehand & McMahon, 1981). Subjects rated all aspects of the program very positively on overall ratings of acceptability suggesting that they perceived the program and its skills to be appropriate for the problem described, fair, sensible, and humane. Rewards, commands, and attends (strategies to increase deficit behavior) were rated as more acceptable than time out and ignoring (which attempt to reduce behavioral excesses). In terms of the methods of introducing each new skill to the child, presenting a rationale was rated as more acceptable than either presenting no rationale or presenting a rationale and modeling its use. Ratings of treatment acceptability were positively correlated with ratings of usefulness and negatively correlated with ratings of difficulty. The ordering of techniques on usefulness and difficulty dimensions directly paralleled ratings of acceptability with only one exception. Comparisons of these findings with previous studies of treatment acceptability and consumer satisfaction are made and discussed in light of the social validity of this parent training program.
Quantum Electric Circuits Analogous to Ballistic Conductors
Creators: name: Dragoman, Daniela
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The conductance steps in a constricted two-dimensional electron gas and the minimum conductivity in graphene are related to a new uncertainty relation between electric charge and conductance in a quantized electric circuit that mimics the electric transport in mesoscopic systems. This uncertainty relation makes specific use of the discreteness of electric charge. Quantum electric circuits analogous to both constricted two-dimensional electron gas and graphene are introduced. In the latter case a new insight into the origin of minimum conductivity is obtained.
description: 14 pages
Critical processing temperature for high performance protected silver thin film mirrors
Creators: name: Fryauf, David M.
name: Phillips, Andrew C.
name: Kobayashi, Nobuhiko P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Silver (Ag) mirrors for astronomical telescopes consist of multiple metallic and dielectric thin films. Furthermore, the topmost surface of such Ag mirrors needs to be covered by a protection coating. While the protection coating is often deposited at room temperature and the entire mirrors are also handled at room temperature, various thin film deposition techniques offer protection coatings with improved characteristics when carried out at elevated temperatures. Thus, in this work, high-performance Ag mirrors were designed and fabricated with a new benchmark. The resulting Ag mirrors were annealed (i.e., post-fabrication annealing) at various temperatures to investigate the viability of introducing thermal processes during and/or after fabrication in improving overall optical performance and durability of protected silver mirrors. In our experiments, Ag mirror samples were deposited by electron-beam evaporation and subsequently annealed at various temperatures in the range from 60 °C to 300 °C, and then the mirror samples underwent an environmental stress test at 80 °C and 80% humidity for 10 days. While all the mirror samples annealed below 200 °C showed negligible corrosion after undergoing the stress testing, those annealed below 160 °C presented spectral reflectivity comparable to or higher than that of as-deposited reference samples. In contrast, the mirror samples annealed above 200 °C exhibited significant degradation after the stress testing. The comprehensive analysis indicated that delamination and voids caused by the growth of Ag grains during the annealing are the primary mechanisms of the degradation.
description: 18 pages, 7 figures
Top production at the Tevatron/LHC and nonstandard, strongly interacting spin one particles
Creators: name: Choudhury, Debajyoti
name: Godbole, Rohini M.
name: Singh, Ritesh K.
name: Wagh, Kshitij
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this note, we consider possible constraints from $t \bar t$ production on the gauge bosons of theories with an extended strong interaction sector such as axigluons or flavour universal colorons. Such constraints are found to be competitive with those obtained from the dijet data. The current $t \bar t$ data from the Tevatron rule out axigluon masses ($m_A$) up to 900 GeV and 850 GeV at 2 $σ$ and 4 $σ$ levels respectively. For the case of flavour universal colorons the data rule out a mass ($m_C$) below 800 GeV (780 GeV) at the $2 (4) σ$ level and also the mass range between 900 GeV to 2.1 TeV at 2 $σ$ level, for $\cot ξ= 1$, where $ξ$ is the mixing angle. For $\cot ξ=2$ on the other hand, the excluded range is $m_C \lsim 950 (920)$ GeV and $m_C \gsim 1.02 (1.15 \lsim m_C \lsim 1.8)$ TeV at $2 σ$ ($4 σ$) level. We point out that for higher axigluon/coloron masses, even for the dijet channel, the limits on the coloron mass, for $\cot ξ= 1$, may be different than those for the axigluon. We also compute the expected forward-backward asymmetry for the case of the axigluons which would allow it to be discriminated against the SM as also the colorons. We further find that at the LHC, the signal should be visible in the $t \bar t$ invariant mass spectrum for a wide range of axigluon and coloron masses that are still allowed. We point out how top polarisation may be used to further discriminate the axigluon and coloron case from the SM as well as from each other.
description: 15 pages, uses LaTex, six figures. To appear in Physics Letters B. Reference to and discussion on the forward-backward asymmetry expected even in the SM, added
On Probability Distributions for Trees: Representations, Inference and Learning
Creators: name: Denis, François
name: Habrard, Amaury
name: Gilleron, Rémi
name: Tommasi, Marc
name: Gilbert, Édouard
Publisher: name: arXiv
Year: 2008
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: We study probability distributions over free algebras of trees. Probability distributions can be seen as particular (formal power) tree series [Berstel et al 82, Esik et al 03], i.e. mappings from trees to a semiring K . A widely studied class of tree series is the class of rational (or recognizable) tree series which can be defined either in an algebraic way or by means of multiplicity tree automata. We argue that the algebraic representation is very convenient to model probability distributions over a free algebra of trees. First, as in the string case, the algebraic representation allows to design learning algorithms for the whole class of probability distributions defined by rational tree series. Note that learning algorithms for rational tree series correspond to learning algorithms for weighted tree automata where both the structure and the weights are learned. Second, the algebraic representation can be easily extended to deal with unranked trees (like XML trees where a symbol may have an unbounded number of children). Both properties are particularly relevant for applications: nondeterministic automata are required for the inference problem to be relevant (recall that Hidden Markov Models are equivalent to nondeterministic string automata); nowadays applications for Web Information Extraction, Web Services and document processing consider unranked trees.
The Highly Damped Quasinormal Modes of Extremal Reissner-Nordström and Reissner-Nordström-de Sitter Black Holes
Creators: name: Daghigh, Ramin G.
name: Green, Michael
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We analyze in detail the highly damped quasinormal modes of $D$-dimensional extremal Reissner-Nordstr$\ddot{\rm{o}}$m and Reissner-Nordstr$\ddot{\rm{o}}$m-de Sitter black holes. We only consider the extremal case where the event horizon and the Cauchy inner horizon coincide. We show that, even though the topology of the Stokes/anti-Stokes lines in the extremal case is different than the non-extremal case, the highly damped quasinormal mode frequencies of extremal black holes match exactly with the extremal limit of the non-extremal black hole quasinormal mode frequencies.
description: 17 pages, 5 figures
Controlled abstention neural networks for identifying skillful predictions for regression problems
Creators: name: Barnes, Elizabeth A.
name: Barnes, Randal J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: The earth system is exceedingly complex and often chaotic in nature, making prediction incredibly challenging: we cannot expect to make perfect predictions all of the time. Instead, we look for specific states of the system that lead to more predictable behavior than others, often termed "forecasts of opportunity". When these opportunities are not present, scientists need prediction systems that are capable of saying "I don't know." We introduce a novel loss function, termed "abstention loss", that allows neural networks to identify forecasts of opportunity for regression problems. The abstention loss works by incorporating uncertainty in the network's prediction to identify the more confident samples and abstain (say "I don't know") on the less confident samples. The abstention loss is designed to determine the optimal abstention fraction, or abstain on a user-defined fraction via a PID controller. Unlike many methods for attaching uncertainty to neural network predictions post-training, the abstention loss is applied during training to preferentially learn from the more confident samples. The abstention loss is built upon a standard computer science method. While the standard approach is itself a simple yet powerful tool for incorporating uncertainty in regression problems, we demonstrate that the abstention loss outperforms this more standard method for the synthetic climate use cases explored here. The implementation of proposed loss function is straightforward in most network architectures designed for regression, as it only requires modification of the output layer and loss function.
description: submitted to the Journal of Advances of Earth System Modeling
On the tensor reduction of one-loop pentagons and hexagons
Creators: name: Diakonidis, T.
name: Fleischer, J.
name: Gluza, J.
name: Kajda, K.
name: Riemann, T.
name: Tausk, J. B.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We perform analytical reductions of one-loop tensor integrals with 5 and 6 legs to scalar master integrals. They are based on the use of recurrence relations connecting integrals in different space-time dimensions. The reductions are expressed in a compact form in terms of signed minors, and have been implemented in a mathematica package called hexagon.m. We present several numerical examples.
description: Latex, 7 pages, 2 eps figures. Contribution to the proceedings of `Loops and Legs in Quantum Field Theory', April 2008, Sondershausen, Germany
Composition of the Pseudoscalar Eta and Eta' Mesons
Creators: name: Thomas, C. E.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The composition of the eta and eta' mesons has long been a source of discussion and is of current interest with new experimental results appearing. We investigate what can be learnt from a number of different processes: V to P gamma and P to V gamma (V and P are light vector and pseudoscalar mesons respectively), P to gamma gamma, J/psi,psi' to P gamma, J/psi,psi' to P V, and chi_{c0,2} to PP. These constrain the eta-eta' mixing angle to a consistent value, phi approx 42 degrees; we find that the c cbar components are lesssim 5% in amplitude. We also find that, while the data hint at a small gluonic component in the eta', the conclusions depend sensitively on unknown form factors associated with exclusive dynamics. In addition, we predict BR(psi' to eta' gamma) approx 1 10^{-5} and BR(chi_{c0} to eta eta') approx 2 10^{-5} - 1 10^{-4}. We provide a method to test the mixing using chi_{c2} to eta eta, eta' eta', and eta eta' modes and make some general observations on chi_{c0,2} decays. We also survey the semileptonic and hadronic decays of bottom and charmed mesons and find some modes where the mixing angle can be extracted cleanly with the current experimental data, some where more data will allow this, and some where a more detailed knowledge of the different amplitudes is required.
description: 34 pages, 11 figures. v2: version published in JHEP, added substantial section on B and D meson electroweak decays, added comment on psi' to eta(')/eta_c gamma, Figs 5 and 6 split and made clearer, added references, other minor revisions which don't change conclusions
The final mass and spin of black hole mergers
Creators: name: Tichy, Wolfgang
name: Marronetti, Pedro
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We consider black holes resulting from binary black hole mergers. By fitting to numerical results we construct analytic formulas that predict the mass and spin of the final black hole. Our formulas are valid for arbitrary initial spins and mass ratios and agree well with available numerical simulations. We use our spin formula in the context of two common merger scenarios for supermassive galactic black holes. We consider the case of isotropically distributed initial spin orientations (when no surrounding matter is present) and also the case when matter closely aligns the spins with the orbital angular momentum. The spin magnitude of black holes resulting from successive generations of mergers (with symmetric mass ratio $η$) has a mean of $1.73η+ 0.28$ in the isotropic case and 0.94 for the closely aligned case.
description: Corrected typos, shortened introduction
Top-Gated Carbon Nanotube FETs from Quantum Simulations: Comparison with Experiments
Creators: name: Sanchez-Soares, Alfonso
name: Kelly, Thomas
name: Fagas, Giorgos
name: Greer, James C.
name: Chen, Edward
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: We present quantum simulations of carbon nanotube field-effect transistors (CNT-FETs) based on top-gated architectures and compare to electrical characterization on devices with 15 nm channel lengths. A non-equilibrium Green's function (NEGF) quantum transport method coupled with a $\vec{k} \cdot \vec{p}$ description of the electronic structure is demonstrated to achieve excellent agreement with the reported experimental data. Factors influencing the electrostatic control of the channel are investigated and reveal that detailed modeling of the electrostatics and the electronic band structure of the CNT is required to achieve quantitative agreement with experiment.
Dominy House, North Main Street, Street View
Creators: name: Historic American Building Survey
Publisher: name: Unknown
Year: 1940
Subjects: Photographs
Photos
Historic buildings
East Hampton
Structures
Dwellings
Dominy Family
Main Street

description: This image shows a street view of the Dominy House located North Main St. in East Hampton. This photo was taken in May 1940 as part of the Historic American Building Survey. This image is a reproduction courtesy of The Library of Congress and was collected sometime from 1970 to 1982 as part of the East Hampton’s Heritage Photo Collection.
description: Images within East Hampton Heritage Photo Collection seem to have been taken or collected in relation to the East Hampton Heritage project, but not all of them were included in the final publication. Several photographer are included in this collection.
Commissioning of the Dual-Beam Imaging Polarimeter for the UH 88-inch telescope
Creators: name: Masiero, Joseph
name: Hodapp, Klaus
name: Harrington, Dave
name: Lin, Haosheng
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In this paper we present the design, calibration method, and initial results of the Dual-Beam Imaging Polarimeter (DBIP). This new instrument is designed to measure the optical polarization properties of point sources, in particular Main Belt asteroids. This instrument interfaces between the Tek 2048x2048 camera and the University of Hawaii's 88-inch telescope, and is available for facility use. Using DBIP we are able to measure linear polarization with a 1-sigma Poisson signal noise of 0.03% per measurement and a systematic error of order 0.06% +/- 0.02%. Additionally, we discuss measurements of the polarization of the asteroid 16 Psyche which were taken as part of the instrument commissioning. We confirm Psyche's negative polarization of -1.037% +/- 0.006% but find no significant modulation of the signal with rotation above the 0.05% polarization level.
description: Accepted to PASP
On heatlike lifespan of solutions of semilinear wave equations in Friedmann-Lemaître-Robertson-Walker spacetime
Creators: name: Tsutaya, Kimitoshi
name: Wakasugi, Yuta
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35Q85, 35L05, 35L70

description: Consider a nonlinear wave equation for a massless scalar field with self-interaction in the spatially flat Friedmann-Lemaître-Robertson-Walker spacetimes. We treat the so-called heatlike case where the critical exponent is affected by the Fujita exponent. We show upper bounds of the lifespan of blow-up solutions by distinguishing subcritical and critical cases.
description: 16 pages
Three fermions in a box at the unitary limit: universality in a lattice model
Creators: name: Pricoupenko, Ludovic
name: Castin, Yvan
Publisher: name: arXiv
Year: 2007
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We consider three fermions with two spin components interacting on a lattice model with an infinite scattering length. Low lying eigenenergies in a cubic box with periodic boundary conditions, and for a zero total momentum, are calculated numerically for decreasing values of the lattice period. The results are compared to the predictions of the zero range Bethe-Peierls model in continuous space, where the interaction is replaced by contact conditions. The numerical computation, combined with analytical arguments, shows the absence of negative energy solution, and a rapid convergence of the lattice model towards the Bethe-Peierls model for a vanishing lattice period. This establishes for this system the universality of the zero interaction range limit.
description: 6 pages
QCD plasma thermalization, collective flow and extraction of shear viscosity
Creators: name: Xu, Zhe
name: Greiner, Carsten
name: Stoecker, Horst
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Fast thermalization and elliptic flow of QCD matter found at the Relativistic Heavy Ion Collider (RHIC) are understood as the consequence of perturbative QCD (pQCD) interactions within a (3+1) dimensional parton cascade. The main contributions stem from pQCD-inspired bremsstrahlung. We extract the shear viscosity to entropy ratio, which is between 0.08 and 0.15.
description: 8 pages, 5 figures, Plenary talk at 20th International Conference on Ultra-Relativistic Nucleus Nucleus Collisions (Quark Matter 2008), Jaipur, India, 4-10 Feb. 2008
Dependence of the energies of fusion on the intermembrane separation: optimal and constrained
Creators: name: Lee, J. Y.
name: Schick, M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We calculate the characteristic energies of fusion between planar bilayers as afunction of the distance between them, measured from the hydrophobic/hydrophilic interface of one of the two nearest, cis, leaves to the other. The two leaves of each bilayer are of equal composition; 0.6 volume fraction of a lamellar-forming amphiphile, such as dioleoylphosphatidylcholine, and 0.4 volume fraction of a hexagonal-forming amphiphile, such as dioleoylphosphatidylethanolamine. Self-consistent field theory is employed to solve the model. We find that the largest barrier to fusion is that to create the metastable stalk. This barrier is the smallest, about 14.6 $k_BT$, when the bilayers are at a distance about 20 percent greater than the thickness of a single leaf, a distance which would correspond to between two and three nanometers for typical bilayers. The very size of the protein machinery which brings the membranes together can prevent them from reaching this optimum separation. For even modestly larger separations, we find a linear rate of increase of the free energy with distance between bilayers for the metastable stalk itself and for the barrier to the creation of this stalk. We estimate these rates for biological membranes to be about 7.1 $k_BT$/nm and 16.7 $k_BT$/nm respectively. The major contribution to this rate comes from the increased packing energy associated with the hydrophobic tails. From this we estimate, for the case of hemagglutinin, a free energy of 38 k_BT for the metastable stalk itself, and a barrier to create it of 73 k_BT. Such a large barrier would require that more than a single hemagglutinin molecule be involved in the fusion process, as is observed.
description: 30 pages including cover, abstract, and 4 figures accepted, J. Chem. Phys
Frequency spectrum of the Casimir force: interpretation and a paradox
Creators: name: Ellingsen, Simen A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The frequency spectrum of the Casimir force between two plates separated by vacuum as it appears in the Lifshitz formalism is reexamined and generalised as compared to previous works to allow for imperfectly reflecting plates. As previously reported by Ford [Phys. Rev. A \textbf{48} (1993) 2962], the highly oscillatory nature of the frequency dependence of the Casimir force points to possibilities for very large and indeed negative Casimir forces if the frequency-dependent dielectric response, $ε(ω)$, of the materials could be tuned. A paradox occurs, however, because an alternative calculation of the effect of a perturbation of $ε(ω)$ involving a Wick rotation to imaginary frequencies indicate only very modest effects. A recent experiment appears to convincingly rule out the reality of Ford's optimistic predictions, although given the enormous technological promise of such frequency effects, further theoretical and experimental study is called for.
description: 6 pages, 7 figures. Final version accepted with Europhysics Letters
Progress in Higgs inflation
Creators: name: Cheong, Dhong Yeon
name: Lee, Sung Mook
name: Park, Seong Chan
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We review the recent progress in Higgs inflation focusing on Higgs-$R^2$ inflation, primordial black hole production and the $R^3$ term.
description: 9 pages, 4 figures, version published in JKPS. An invited review for the Korean Physical Society
Insensitivity of flavoured leptogenesis to low energy CP violation
Creators: name: Davidson, Sacha
name: Garayoa, Julia
name: Palorini, Federica
name: Rius, Nuria
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: If the baryon asymmetry of the Universe is produced by leptogenesis, CP violation is required in the lepton sector. In the seesaw extension of the Standard Model with three hierarchical right-handed neutrinos, we show that the baryon asymmetry is insensitive to the PMNS phases: thermal leptogenesis can work for any value of the observable phases. This result was well-known when there are no flavour effects in leptogenesis; we show that it remains true when flavour effects are included.
description: 4 pages, 1 figure; version accepted for publication, added explanations, notation clarified
Miglioramento della produzione di composti biocidi in piante officinali
Creators: name: Campanile, Francesco
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2010

description: I composti volatili delle piante, specialmente gli oli essenziali, hanno una spiccata attività antimicrobica verso molti patogeni dell’uomo, degli animali, delle piante e degli alimenti. Lo scopo di questa ricerca è stato la valutazione, sia in ambiente controllato che in pieno campo, dell’effetto di diversi ammendanti organici e dell’inoculazione di batteri promotori della crescita/induttori di resistenza (PGPR/ISR), sulla resa e qualità degli oli essenziali estratti da due colture officinali, Thymus vulgaris L. e Origanum vulgare L., al fine di potenziare la produzione e l’attività biocida dei suddetti oli nei confronti di batteri e funghi patogeni delle principali colture ortive
IDENTIFICATION OF NOVEL PROTEIN KINASES INVOLVED IN THE PROLIFERATION OF THYROID CANCER CELLS
Creators: name: Cantisani, Maria Carmela
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2010

description: This dissertation focuses on the study of different signaling mechanisms regulating thyroid carcinogenesis, with the aim of identifying new genes involved in thyroid tumors, thus potential targets for new anti-cancer therapeutics. Appended manuscripts II and III focus on the analysis of the role exerted by SOD3 (Superoxide dismutase 3) and components of the Sonic/Hedgehog signaling pathway in thyroid carcinomas. The main body of this dissertion (manuscript I), instead, describes a knock-down screening performed in the TPC1 thyroid cancer cell line with a library of siRNA targeting the entire complement of human protein kinases (kinome) and kinase-related proteins. Thyroid cancer is primarily associated to the oncogenic conversion of protein kinases (BRAF, RET, NTRK1, AKT). Thus, the aim of this screen was to identify novel protein kinases required to sustain viability of thyroid carcinoma cells and therefore involved in thyroid carcinogenesis. Through this screening, we identified 21 “down hits”, e.g. kinases whose knock-down reduced by 30% or more TPC1 cell viability. Most of these kinases were essential not only for the viability of TPC1 but also other thyroid cancer cell lines with different genetic backgrounds (RAS or BRAF mutations) but not normal thyroid cells. These kinases included components of several signaling pathways. In particular, we identified members of the EPH (ephrin receptors) family, namely EPHA2, EPHA4 and EPHB2, as overexpressed and functionally active in various thyroid cancer cell lines.

These three EPH were also upregulated in human thyroid tumor specimens. Finally, functional assays proved that the expression of EPHA2, EPHA4 and EPHB2 is essential not only for thyroid cancer cell growth but also motility and invasiveness. In conclusion, our study strongly suggests that EPHA2, EPHA4 and EPHB2 activation plays an important role in human cancers derived from thyroid follicular epithelium.
Attenuating surface gravity waves with mechanical metamaterials
Creators: name: De Vita, Francesco
name: De Lillo, Filippo
name: Bosia, Federico
name: Onorato, Miguel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Metamaterials and photonic/phononic crystals have been successfully developed in recent years to achieve advanced wave manipulation and control, both in electromagnetism and mechanics. However, the underlying concepts are yet to be fully applied to the field of fluid dynamics and water waves. Here, we present an example of the interaction of surface gravity waves with a mechanical metamaterial, i.e. periodic underwater oscillating resonators. In particular, we study a device composed by an array of periodic submerged harmonic oscillators whose objective is to absorb wave energy and dissipate it inside the fluid in the form of heat. The study is performed using a state of the art direct numerical simulation of the Navier-Stokes equation in its two-dimensional form with free boundary and moving bodies. We use a Volume of Fluid interface technique for tracking the surface and an Immersed Boundary method for the fluid-structure interaction. We first study the interaction of a monochromatic wave with a single oscillator and then add up to four resonators coupled only fluid-mechanically. We study the efficiency of the device in terms of the total energy dissipation and find that by adding resonators, the dissipation increases in a non trivial way. As expected, a large energy attenuation is achieved when the wave and resonators are characterised by similar frequencies. As the number of resonators is increased, the range of attenuated frequencies also increases. The concept and results presented herein are of relevance for applications in coastal protection.
CA-SBA-772: Archaeological site record for CA-SBA-772
Creators: name: Kekich, Jessica
Year: 2022
Subjects: subject: Santa Barbara (County)
valueUri: https://core.tdar.org/browse/geographic-keyword/3486/santa-barbara-county
subject: Vandenberg Air Force Base (VAFB)
valueUri: https://core.tdar.org/browse/geographic-keyword/85469/vandenberg-air-force-base-vafb
subject: Vandenberg Space Force Base (VSFB)
valueUri: https://core.tdar.org/browse/geographic-keyword/85584/vandenberg-space-force-base-vsfb
subject: United States of America (Country)
valueUri: https://core.tdar.org/browse/geographic-keyword/384/united-states-of-america-country
subject: North America (Continent)
valueUri: https://core.tdar.org/browse/geographic-keyword/2890/north-america-continent
subject: California (State / Territory)
valueUri: https://core.tdar.org/browse/geographic-keyword/1484/california-state-territory
subject: CA-SBA-772
valueUri: https://core.tdar.org/browse/site-name/123362/ca-sba-772
subject: Temporary Campsite
valueUri: https://core.tdar.org/browse/site-type/926/temporary-campsite
subject: Chipping Station
valueUri: https://core.tdar.org/browse/site-type/1040/chipping-station
subject: Quarry
valueUri: https://core.tdar.org/browse/site-type/293/quarry
subject: Shell
valueUri: https://core.tdar.org/browse/material-type/14/shell
subject: Monterey Chert
valueUri: https://core.tdar.org/browse/material-type/334/monterey-chert
subject: Chipped Stone
valueUri: https://core.tdar.org/browse/material-type/2/chipped-stone
subject: mytilus
valueUri: https://core.tdar.org/browse/material-type/3835/mytilus
subject: Hammerstone
valueUri: https://core.tdar.org/browse/other-keyword/5939/hammerstone
subject: MIdden
valueUri: https://core.tdar.org/browse/other-keyword/135815/midden
subject: Core
valueUri: https://core.tdar.org/browse/other-keyword/618/core
subject: Edge-Modified Flake
valueUri: https://core.tdar.org/browse/other-keyword/24587/edge-modified-flake
subject: Archaeological Overview
valueUri: https://core.tdar.org/browse/investigation-type/1/archaeological-overview
subject: Site Evaluation / Testing
valueUri: https://core.tdar.org/browse/investigation-type/10/site-evaluation-testing

description: This document is the archaeological site record for CA-SBA-772. The record consists of 4 recordation events.