cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
D9.3 Identified Viable Business Models and Green Financing Instruments
Creators: name: Batisani, Nnyaladzi
name: Motlopi, Kgomotsego
Publisher: name: SteamBioAfrica
Year: 2023
Subjects: Business models
Value chains
Sustainable Development

description: This deliverable D9.3 presents business models proposal for the commercialisation of the SteamBioAfrica Super-Heated Steam (SBA SHS) solid biomass fuel in the three countries, Botswana, Namibia, and South Africa. The proposed Business Models (BMs) have been prepared to assist SMMEs; in the three countries identify businesses opportunities to invest in, including associated SMME business financing instruments available to facilitate participation in the SHS value chain. Using the prepared Business Model Canvas (BMC,), emerging SMMEs and existing businesses in the solid biomass industry will be able to identify business, customer dimensions and associated value proposition, of a potential investment opportunity. The implementation of these BMs is expected to facilitate the commercialisation of SHS solid biomass energy product into the domestic retail markets, creating local jobs and wealth in rural areas. The development of business models targeting the domestic household-based value chains will inform the SBA Plan for Dissemination Exploitation of Project Results (PDER). Financing resources identified in the report will support long term commercialisation of across the value chains, especially the downstream value chains. From this domestic retail markets especially for countries, for instance Botswana where the biomass energy industry is still in its infancy, export markets could develop. This deliverable follows the completion of household and retail baselines survey deliverables D9.1 and D10.1, in addition to an analysis of local market and consumer profiles, a value chain mapping report covering the three target countries of Botswana, Namibia, and South Africa. Other deliverables key to D9.3 are D10.2 are the capacity building curricula to strengthen local bioenergy sector and market as well as D10.3 on Policy and regulation report for all three target countries. The identified BMs, feasibility will be deployed through interested SMME’s along the SHS solid biomass value chain and their feasibility assessed with these SMME’s. Targeted SMME’s will include wholesalers, retailers, and distributors. Continued engagement will facilitate a feedback/validation mechanism to facilitate BM improvements using a set of key indicators to facilitate BMs performance monitoring. The Business Model proposals are not necessarily a blueprint to successful implementation of business. Business success depends on the market and policy environment in each country, as well as the people (both the customers and the business owner) involved in its roll out. However, the use of the Business Model Canvas facilitates the identification of key aspects to be considered when designing new business and seeking to improve existing businesses.
Strongly correlated excitonic insulator in atomic double layers
Creators: name: Ma, Liguo
name: Nguyen, Phuong X.
name: Wang, Zefang
name: Zeng, Yongxin
name: Watanabe, Kenji
name: Taniguchi, Takashi
name: MacDonald, Allan H.
name: Mak, Kin Fai
name: Shan, Jie
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Excitonic insulators (EI) arise from the formation of bound electron-hole pairs (excitons) in semiconductors and provide a solid-state platform for quantum many-boson physics. Strong exciton-exciton repulsion is expected to stabilize condensed superfluid and crystalline phases by suppressing both density and phase fluctuations. Although spectroscopic signatures of EIs have been reported, conclusive evidence for strongly correlated EI states has remained elusive. Here, we demonstrate a strongly correlated spatially indirect two-dimensional (2D) EI ground state formed in transition metal dichalcogenide (TMD) semiconductor double layers. An equilibrium interlayer exciton fluid is formed when the bias voltage applied between the two electrically isolated TMD layers, is tuned to a range that populates bound electron-hole pairs, but not free electrons or holes. Capacitance measurements show that the fluid is exciton-compressible but charge-incompressible - direct thermodynamic evidence of the EI. The fluid is also strongly correlated with a dimensionless exciton coupling constant exceeding 10. We further construct an exciton phase diagram that reveals both the Mott transition and interaction-stabilized quasi-condensation. Our experiment paves the path for realizing the exotic quantum phases of excitons, as well as multi-terminal exciton circuitry for applications.
description: 21 pages, 12 figures
Unidirectional d-wave superconducting domains in the two-dimensional t-J model
Creators: name: Raczkowski, Marcin
name: Capello, Manuela
name: Poilblanc, Didier
name: Fresard, Raymond
name: Oles, Andrzej M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Motivated by the recently observed pattern of unidirectional domains in high-T_c superconductors [Y. Kohsaka et al., Science 315, 1380 (2007)], we investigate the emergence of spontaneous modulations in the d-wave superconducting resonating valence bond phase using the t-J model at x=1/8 doping. Half-filled charge domains separated by four lattice spacings are found to form along one of the crystal axis leading to modulated superconductivity with out-of-phase d-wave order parameters in neighboring domains. Both renormalized mean-field theory and variational Monte Carlo calculations yield that the energies of modulated and uniform phases are very close to each other.
description: 4 pages, 5 figures, minor revisions, and added references
GRB afterglows in the ELT era
Creators: name: Kann, D. A.
name: Klose, S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: This is a very short conference proceeding based on a poster shown at the ESO workshop "Science with the VLT in the ELT Era". For more information, see "The Afterglows of Swift-era Gamma-Ray Bursts. I. Comparing pre-Swift and Swift era Long/Soft (Type II) GRB Optical Afterglows" (arXiv:0712.2186) as well as "The Afterglows of Swift-era Gamma-Ray Bursts. II. Short/Hard (Type I) vs. Long/Soft (Type II) Optical Afterglows" (arXiv:0804.1959)
description: Submitted to the conference proceedings of the ESO workshop "Science with the VLT in the ELT Era"; 2 pages, 1 figure
Revealing the target electronic structure with under-threshold RABBIITT
Creators: name: Kheifets, Anatoli
Publisher: name: arXiv
Year: 2021
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: The process of reconstruction of attosecond beating by interference of two-photon transitions (RABBITT) reveals the target atom electronic structure when one of the transitions proceeds from below the ionization threshold. Such an under-threshold RABBITT resonates with the target bound states and thus maps faithfully the discrete energy levels and the corresponding oscillator strengths. We demonstrate this sensitivity by considering the Ne atom driven by the combination of the XUV and IR pulses at the fundmanetal laser frequency in the 800 and 1000~nm ranges.
description: 8 pages, 5 figures
Constructing and validating a questionnaire on barriers to EFL learners’ reflective writing
Creators: name: Farahian, Majid
name: Salahi, Fariba
Publisher: name: figshare
Year: 2021
Subjects: subject: 200303 English as a Second Language
subject: FOS: Languages and literature

description:
The purpose of the current study was to develop and validate a scale to assess the inhibitors to reflective writing of Iranian English as a Foreign Language (EFL) learners.
Statistics of bubble rearrangement dynamics in a coarsening foam
Creators: name: Gittings, A. S.
name: Durian, D. J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We use speckle-visibility spectroscopy to measure the time-dependence of bubble rearrangement events that are driven by coarsening in an aqueous foam. This technique gives the time-trace for the average scattering site speed within a prescribed volume of the sample. Results are analyzed in terms of distributions of event times, event speeds, and event displacements. The distribution of rest times between successive events is also measured; comparison with diffusing-wave spectroscopy results shows that the spatial structure of a typical event consists of a core of only a few bubbles which undergo topology change plus a surrounding halo of bubbles which shift by an amount that decays to one wavelength at four to five bubbles away. No correlations are found between the durations, speeds, and rest times between successive events.
eta, eta-prime --> pi+ pi- l+ l- in a chiral unitary approach
Creators: name: Borasoy, B.
name: Nißler, R.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The decays eta, eta-prime --> pi+ pi- l+ l- (with l = e, mu) are investigated within a chiral unitary approach which combines the chiral effective Lagrangian with a coupled-channels Bethe-Salpeter equation. Predictions for the decay widths and spectra are given.
description: 22 pages, 7 figures, 5 tables; additional material added and figures 6,7 revised
BDNF gene methylation in brain of suicide subjects
Creators: name: Keller, Simona
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2009

description: Abstract: Brain-derived neurotrophic factor (BDNF) plays a pivotal role in the pathophysiology of suicidal behaviour and BDNF levels are decreased in brain and plasma of suicide subjects. So far, the mechanisms leading to down-regulation of BDNF expression are poorly understood. In this work we tested the hypothesis that alterations of DNA methylation could be involved in the disregulation of BDNF gene expression in the brain of suicide subjects. We determined, by three independent quantitative methylation techniques, the DNA methylation degree at BDNF promoter IV and the genome-wide DNA methylation levels in the brain’s Wernicke’s area of 44 suicide completers and 33 non-suicide control subjects. Results showed in post-mortem brain samples from suicide subjects a statistically significant increase of DNA methylation at specific CpG sites in the BDNF promoter/exon IV compared to non-suicide control subjects. Most of CpG sites lying in the -300/+500 region, on both strands, were low or no methylated with the exception of few sites located near the transcriptional start site that were differentially methylated while genome-wide methylation levels were comparable among the subjects. In conclusions BDNF promoter/exon IV is frequently hypermethylated in post-mortem brain Wernicke’s area of suicide subjects irrespective of genome-wide methylation levels, indicating that a gene-specific increase in DNA methylation could cause or contribute to down-regulation of BDNF expression in suicide subjects. The reported data reveal a novel link between epigenetic alteration in brain and suicidal behaviour.
La missione ESA-Rosetta: obiettivi scientifici e aspetti della missione
Creators: name: Aronica, Alessandro
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2009

description: GIADA (Grain Impact Analyser and Dust Accumulator) è lo strumento italiano integrato a bordo della sonda Rosetta ed è dedicato allo studio dei flussi di polveri emesse dal nucleo della cometa 67P/Churyumov-Gerasimenko durante la sua fase di avvicinamento al Sole e alla misura delle caratteristiche fisiche e morfologiche dei singoli grani di polvere (quantità di moto, velocità, massa e dimensioni). L’obiettivo principale della Tesi di Dottorato è stato quello di studiare il comportamento dello strumento GIADA in volo durante la fase di crociera di Rosetta e in varie condizioni operative. L’attività di ricerca, dunque, è stata finalizzata allo sviluppo e alla preparazione delle operazioni preliminari ai test periodici in volo, all’elaborazione e all’analisi critica dei dati relativi ai medesimi test e alla catalogazione ed archiviazione dei dati già analizzati seguendo i format e le codifiche standard dell’ESA. Le metodologie sviluppate sono state di tipo sperimentale e numerico.
ALTIMETRY BY CASSINI RADAR: PROCESSING AND SIMULATION
Creators: name: Alberti, Giovanni
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2009

description: The Cassini mission, that is a joint NASA/ESA/ASI effort, has recently offered the unique possibility of exploring Titan, the largest moon of Saturn, that is the only satellite in the solar system to host an appreciable atmosphere, which unfortunately made the surface below very difficult to be observed from the Earth with optical instruments. In fact, a smoggy haze, mostly composed of aerosols resulting from photochemistry between methane and hydrogen and other hydrocarbons, completely envelops the satellite. The Radar Altimeter of the Cassini Mission to Titan operates in a transition region between pulse and beam-limited condition. Due to the specific observation geometry, low values of mispointing angle have been found to significantly affect altimeter impulse response. This involves a non-conventional formulation of the system response which has been the main goal of this research doctorate. An analytical model of the average return power waveform, valid for near-nadir altimetry measurements, has been developed in order to cope with the particular operating conditions of Cassini Mission. The model used to approximate the altimeter waveform is based on the same general assumptions of the classical Brown’s model (1977), but exploits a flat surface response approximation by Prony’s methods. Both theoretical considerations and simulated data have been taken into account to support the accuracy of the proposed model. To infer the main geophysical parameters describing surface topography from altimetry data, a parametric estimation procedure has been used. The Maximum Likelihood Estimator (MLE) procedure has been chosen since in principle it can assure optimal performance as consequence of the analytical model we used to describe the system impulse response. Performances of the implemented method have been numerically evaluated through simulation of data received by CASSINI in high-resolution altimeter mode. The algorithms have been implemented in specific software tools for processing, managing, visualizing and archiving scientific output products containing all the retrieved information about the Titan surface topography, starting from the raw data as delivered by JPL/NASA. The developed processing system is currently in charge of producing standard altimetric Cassini products to be archived in the Planetary Data System (PDS) format. The retrieved topography of the fly-bys performed up to now are shown and shortly commented. Further activities have been dedicated to altimetry echo waveform simulation. The main reason for this effort is to better understand the Titan’s surface characteristics by analyzing the signals received by CASSINI radar in altimetric mode. The approach followed is based on a fractal characterization of Titan’s surface that enables a closed form for the scattering coefficient. A preliminary analysis has been performed on actual data (T30 fly-by) for estimating fractal parameters of Titan’s surface.
Theory of point contact spectroscopy in electron-doped cuprates
Creators: name: Liu, C. S.
name: Wu, W. C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: In the hole-doped $d_{x^{2}-y^{2}}$-wave cuprate superconductor, due to the midgap surface state (MSS), a zero bias conductance peak (ZBCP) is widely observed in [110] interface point contact spectroscopy (PCS). However, ZBCP of this geometry is rarely observed in the electron-doped cuprates, even though their pairing symmetry is still likely the $d_{x^{2}-y^{2}}$-wave. We argue that this is due to the coexistence of antiferromagnetic (AF) and the superconducting (SC) orders. Generalizing the Blonder-Tinkham-Klapwijk (BTK) formula to include an AF coupling, it is shown explicitly that the MSS is destroyed by the AF order. The calculated PCS is in good agreement with the experiments.
description: 5 pages, 2 figures. Replaced with published version
Afterglows of Gamma-Ray Bursts: Short vs. Long GRBs
Creators: name: Kann, D. A.
name: Klose, S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We compiled a large sample of Swift-era photometric data on long (Type II) and short (Type I) GRB afterglows. We compare the luminosity and energetics of the different samples to each other and to the afterglows of the pre-Swift era. Here, we present the first results of these studies.
description: Conference Proceedings, "Gamma-Ray Bursts 2007", Santa Fe, shortened poster presentation; 4 pages, 3 figures; for full updated papers, go here to arXiv:0712.2186 and also here to arXiv:0804.1959
Damped bounces of an isolated perfect quantum gas
Creators: name: Camalet, S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The issue of the thermalization of an isolated quantum system is addressed by considering a perfect gas confined by gravity and initially trapped above a certain height. As we are interested in the behavior of truly isolated systems, we assume the gas is in a pure state of macroscopically well-defined energy. We show that, in general, for single-particle distributions, such a state is strictly equivalent to the microcanonical mixed state at the same energy. We derive an expression for the time-dependent gas density which depends on the initial gas state only via a few thermodynamic parameters. Though we consider non-interacting particles, the density relaxes into an asymptotic profile, but which is not the thermal equilibrium one determined by the gas energy and particle number.
Microscopic origin of Magnetic Ferroelectrics in Nonlinear Multiferroics
Creators: name: Hu, Jiangping
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A simple but general microscopic mechanism to understand the interplay between the electric and magnetic degrees of freedom is developed. Within this mechanism, the magnetic structure generates an electric current which induce an counterbalance electric current from the spin orbital coupling. When the magnetic structure is described by a single order parameter, the electric polarization is determined by the single spin orbital coupling parameter, and the material is predicted to be a half insulator. This mechanism provides a simple estimation of the value of ferroelectricity and sets a physical limitation as well.
description: 4 pages, 1 figure
Stellar Evolutionary Effects on the Abundances of PAH and SN-Condensed Dust in Galaxies
Creators: name: Galliano, F.
name: Dwek, E.
name: Chanial, P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Spectral and photometric observations of nearby galaxies show a correlation between the strength of their mid-IR aromatic features, attributed to PAH molecules, and their metal abundance, leading to a deficiency of these features in low-metallicity galaxies. In this paper, we suggest that the observed correlation represents a trend of PAH abundance with galactic age, reflecting the delayed injection of carbon dust into the ISM by AGB stars in the final post-AGB phase of their evolution. AGB stars are the primary sources of PAHs and carbon dust in galaxies, and recycle their ejecta back to the interstellar medium only after a few hundred million years of evolution on the main sequence. In contrast, more massive stars that explode as Type II supernovae inject their metals and dust almost instantaneously after their formation. We first determined the PAH abundance in galaxies by constructing detailed models of UV-to-radio SED of galaxies that estimate the contribution of dust in PAH-free HII regions, and PAHs and dust from photodissociation regions, to the IR emission. All model components: the galaxies' stellar content, properties of their HII regions, and their ionizing and non-ionizing radiation fields and dust abundances, are constrained by their observed multiwavelength spectrum. After determining the PAH and dust abundances in 35 nearby galaxies using our SED model, we use a chemical evolution model to show that the delayed injection of carbon dust by AGB stars provides a natural explanation to the dependence of the PAH content in galaxies with metallicity. We also show that larger dust particles giving rise to the far-IR emission follow a distinct evolutionary trend closely related to the injection of dust by massive stars into the ISM.
description: ApJ, 69 pages, 46 figures, Accepted
Girolamo Imparato (1549-50 ca.) ed altre questioni del tardo Cinquecento napoletano
Creators: name: De Mieri, Stefano
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2006

description: La tesi affronta lo studio dell’attività di Girolamo Imparato, uno dei principali pittori napoletani attivi in Italia meridionale tra gli anni settanta del Cinquecento e il primo decennio del Seicento. Partendo dalla considerazione delle opere più antiche viene ricostruita l’intera vicenda artistica del maestro tardo manierista, responsabile di un buon numero di pale d’altare conservate in contesti prestigiosi della città partenopea e di alcune località meridionali. Il percorso del maestro è ricostruito con l’ausilio di numerosi documenti inediti, rintracciati prevalentemente in archivi napoletani, che consentono di comprenderne adeguatamente l’evoluzione. Serrata risulta l’analisi delle componenti artistiche del linguaggio pittorico dell’Imparato: se ne discutono così i rapporti con personalità quali Giovan Bernardo Lama, suo probabile maestro, con Silvestro Buono, col fiammingo Teodoro D’Errico,  e sopratutto col Barocci e i suoi seguaci, attivi tra Roma e Napoli intorno al 1590. È inoltre investigato il rapporto stabilito dal maestro con i committenti principali, in special modo con i padri della Compagnia di Gesù, per i quali l’Imparato fu uno degli artisti privilegiati in Italia meridionale. L’analisi di nuovi documenti ha consentito di riscoprire una serie di dipinti sconosciuti, di comprendere il funzionamento dell’attivissima bottega imparatesca e di far affiorare una serie di vicende artistiche minori del tardo Cinquecento napoletano.
Dyon dynamics near marginal stability and non-BPS states
Creators: name: Ritz, Adam
name: Vainshtein, Arkady
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We derive the general form of the moduli-space effective action for the long-range interaction of two BPS dyons in N=2 gauge theories. This action determines the bound state structure of various BPS and non-BPS states near marginal stability curves, and we utilise it to compute the leading correction to the BPS-mass of zero-torsion non-BPS bound states close to marginal stability.
description: 11 pages; v2: references added, to appear in Phys. Lett. B
Seismic Early Warning Systems: Procedure for automated decision making
Creators: name: Grasso, Veronica Francesca
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2006

description: Le grandi perdite economiche e sociali causate dal verificarsi di eventi sismici hanno incentivato, negli ultimi decenni, gli studi sul rischio sismico con l’obiettivo di formulare delle strategie per la mitigazione delle conseguenze di tali eventi.
L’elevata sismicità del territorio nazionale e l’elevato livello di vulnerabilità del patrimonio edilizio rendono il problema della mitigazione del rischio sismico molto sentito anche in Italia.
Confrontando i danni provocati da eventi sismici verificatisi in Italia, con quelli accaduti in California ed in Giappone, si è evidenziato che il danno avutosi in Italia, ad esempio in Umbria e Marche 1997, è confrontabile con quello causato da eventi ai quali è associata un’energia 30 volte superiore, come quelli del 1989 in California.
La mitigazione del rischio sismico è possibile mediante approcci di tipo tradizionale (monitoraggio, rinforzo strutturale, etc.) e applicazione di sistemi early warning (EW) che rappresentano un approccio innovativo alla riduzione degli effetti di eventi catastrofici.
Il lavoro svolto si inquadra nell’ambito delle strategie innovative di mitigazione del rischio sismico.
L’attenzione è stata focalizzata allo studio dei sistemi EW, in particolare è stata effettuata un’analisi dell’errore associato alla predizione, realizzando un frame-work per la valutazione e la propagazione dell’errore, che rappresenta uno strumento utile per il confronto delle metodologie esistenti di predizione, la valutazione del parametro che maggiormente influisce sull’incertezza totale e la definizione di strategie di mitigazione dell’errore. Inoltre nell’ottica che falsi e mancati allarmi rappresentano il punto critico di una applicazione EW, è stato sviluppato un metodo analitico per la valutazione quantitativa della probabilità di falso e mancato allarme in una fase pre-evento e durante l’evento sismico.
Il calcolo di tali probabilità in una fase pre-evento rappresenta uno strumento necessario per la valutazione della fattibilità dell’applicazione EW e per la definizione delle soglie di allarme ottimali.
Inoltre è stato definito un modello decisionale per valutare quando e se attivare l’allarme sulla base delle probabilità di falso e mancato allarme, valutate ad ogni istante.
Problems in Low-Mass Stellar Rotation
Creators: name: WILSON, TANNER ALEX
Publisher: name: Monash University
Year: 2023
Subjects: classificationCode: 510109
subject: Stellar astronomy and planetary systems

description: Rotation is an often overlooked factor in stellar evolution. Understanding the evolution of rotation is pertinent to improving our understanding of the role that rotating stellar evolution plays in the evolution of the universe around us. Further, understanding the effects of rotation on observable stellar parameters is required to measure said parameters precisely. In this thesis, I discuss three current problems in our understanding of the evolution and effects of rotation in low-mass stars and propose novel approaches to rectify and further constrain the possible underlying physical mechanisms underlying these problems.
On Isotropic Sets of Points in the Plane. Application to the Design of Robot Archirectures
Creators: name: Angeles, Jorge
name: Chablat, Damien
Publisher: name: arXiv
Year: 2007
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Various performance indices are used for the design of serial manipulators. One method of optimization relies on the condition number of the Jacobian matrix. The minimization of the condition number leads, under certain conditions, to isotropic configurations, for which the roundoff-error amplification is lowest. In this paper, the isotropy conditions, introduced elsewhere, are the motivation behind the introduction of isotropic sets of points. By connecting together these points, we define families of isotropic manipulators. This paper is devoted to planar manipulators, the concepts being currently extended to their spatial counterparts. Furthermore, only manipulators with revolute joints are considered here.
An unexpected outburst from A0535+262
Creators: name: Hill, A. B.
name: Bird, A. J.
name: Dean, A. J.
name: McBride, V. A.
name: Sguera, V.
name: Clark, D. J.
name: Molina, M.
name: Scaringi, S.
name: Shaw, S. E.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A0535+262 is a transient Be/X-ray binary system which was in a quiescent phase from 1994-2005. In this paper we report on the timing and spectral properties of the INTEGRAL detection of the source in October 2003. The source is detected for ~6000 seconds in the 18-100 keV energy band at a luminosity of ~3.8 x 10^{35} erg s^{-1}; this is compatible with the high end of the range of luminosities expected for quiescent emission. The system is observed to be outside of the centrifugal inhibition regime and pulsations are detected with periodicity, P=103.7 +/- 0.1 seconds. An examination of the pulse history of the source shows that it had been in a constant state of spin-down since it entered the quiescent phase in 1994. The rate of spin-down implies the consistent presence of an accretion disk supplying torques to the pulsar. The observations show that the system is still active and highly variable even in the absence of recent Type I or Type II X-ray outbursts.
description: 5 pages, 4 figures, 1 table. Accepted for publication in MNRAS
Geometrical Frustration and Cluster Spin Glass with Random Graphs
Creators: name: Silveira, Alexandre
name: Erichsen, R.
name: Magalhaes, S. G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We develop a novel method based in the sparse random graph to account the interplay between geometric frustration and disorder in cluster magnetism. Our theory allows to introduce the cluster network connectivity as a controllable parameter. Two types of inner cluster geometry are considered: triangular and tetrahedral. The theory was developed for a general, non-uniform intra-cluster interactions, but in the present paper the results presented correspond to uniform, anti-ferromagnetic (AF) intra-clusters interactions $J_{0}/J$. The clusters are represented by nodes on a finite connectivity random graph, and the inter-cluster interactions are random Gaussian distributed. The graph realizations are treated in replica theory using the formalism of order parameter functions, which allows to calculate the distribution of local fields and, as a consequence, the relevant observable. In the case of triangular cluster geometry, there is the onset of a classical Spin Liquid state at a temperature $T^{*}/J$ and then, a Cluster Spin Glass (CSG) phase at a temperature $T_{f}/J$. The CSG ground state is robust even for very weak disorder or large negative $J_{0}/J$. These results does not depend on the network connectivity. Nevertheless, variations in the connectivity strongly affect the level of frustration $f_{p}=-Θ_{CW}/T_{f}$ for large $J_{0}/J$. In contrast, for the non-frustrated tetrahedral cluster geometry, the CSG ground state is suppressed for weak disorder or large negative $J_{0}/J$. The CSG boundary phase presents a re-entrance which is dependent on the network connectivity.
description: 29 pages, 8 figures, submitted to PRE
CBS News Poll: January 2018
Creators: name: CBS News
Publisher: name: Roper Center for Public Opinion Research
Year: 2021

description: Approval of President Donald Trump in handling government affairs (10); direction country is going in (1); approval of Congress (1); attitudes towards political parties (2); economic situation of the country (1); President Trump's policies effects on family (1); progress of President Trump's promises (2); priorities of national government (1); cooperation between political parties (1); approval of tax law passed in last December (3); priority when admitting immigrants (2); approval of building a wall along the U.S.-Mexico border (3); attitudes towards undocumented immigrants (2); appropriateness of remarks said by President Trump (3); President Trump's relations with Russia (3); opinion of U.S. military (3); legality of abortion (1); President Trump's policies towards women (3).
Doctoral thesis recital (piano), lecture
Creators: name: Wang, Cheng (Pianist)
Publisher: name: The University of Texas at Austin
Year: 2021
Subjects: Pleyel, Ignaz, 1757-1831. Sonatas, piano, flute, cello, B. 436, D major

description: A discussion of Ignaz Pleyel's Piano trio in D major, B. 436
Prodotti tipici e sviluppo rurale: un caso studio: il pomodorino di Corbara
Creators: name: Masci, Francesca
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2006

description: Negli ultimi anni, si è sempre più diffusa la consapevolezza che le produzioni agro-alimentari tipiche, possano costituire un’opportunità per lo sviluppo del territorio cui sono legate, ciò nella misura in cui siano capaci non solo di promuovere l’acquisizione di nuovi spazi di mercato ma anche di coinvolgere altri settori che sono direttamente o indirettamente collegati allo stesso prodotto. In questo contesto, la Comunità Europea ha individuato, nella istituzione dei marchi d’origine, lo strumento chiave per promuovere lo sviluppo integrato del territorio cui il marchio si riferisce. Numerose esperienze insegnano tuttavia, che tale sviluppo non è ne immediato ne automatico, anzi se lo stesso marchio d’origine non viene supportato da adeguate strategie, rischia di non generare gli effetti sperati. Le strategie da affiancare al marchio, possono essere molto diverse tra di loro, ma perché sino efficaci è necessario che tengano conto della specificità del prodotto, del contesto produttivo e dei potenziali acquirenti. Alla luce di queste considerazioni, è stato individuato un prodotto, il pomodorino Corbarino, per il quale è in via di istituzione il marchio DOP; sono state evidenziate le caratteristiche del contesto produttivo, dopodiché considerando le potenzialità delle filiere corte di prossimità, quale strumento per aumentare il reddito dei produttori ed attivare gli effetti più ampi legati alla vendita del prodotto nell’area di produzione, si è valutata la disponibilità ad acquistare il prodotto direttamente in azienda. Il tutto, con l’obbiettivo generale, di dare delle indicazioni politico-operative, da affiancare al marchio, utili nella elaborazione delle strategie di valorizzazione del prodotto pomodorino Corbarino.
Por uma política de valorização das Revistas acadêmicas na área de História
Creators: name: Fórum De Editores De Periódicos Da Anpuh-Brasil
Publisher: name: Zenodo
Year: 2021
Subjects: editorial
promoção de periódicos

description: O arquivo em Word está disponível para download, de modo a ser utilizado pelas equipes editoriais Editorial coletivo idealizado, discutido e redigido no âmbito do Fórum de Editores da Anpuh-Brasil A ideia deste editorial coletivo surgiu, foi discutida e elaborada no Fórum de Editores de periódicos da ANPUH-Brasil, entre os meses de setembro e novembro de 2021. Buscou-se na iniciativa elementos consensuais no campo da História, aqui representado pelos editores de vários dos periódicos da área, em defesa dos artigos publicados, dos trabalhos realizados pelas revistas e por suas equipes editoriais. Destacar o valor dos nossos periódicos e artigos não é menosprezar ou reduzir o papel do livro autoral junto à área, mas é reconhecer que a manutenção e existência dos periódicos, enquanto trabalho de médio e longo prazo, requerem atenção e trabalhos específicos, nem sempre reconhecidos pelas instâncias e instituições que os abrigam. De tal modo, esta iniciativa visa lançar luz e fomentar o debate sobre o papel dos periódicos e seu lugar na circulação de conhecimento, o papel das equipes editoriais (editores, pareceristas, entre outros), necessidade de financiamento público (na garantia do acesso aberto diamante) e importância dos apoios institucionais.
description: {"references": ["SITUA\u00c7\u00c3O DOS PERI\u00d3DICOS CIENT\u00cdFICOS brasileiros. Academia Brasileira de Ci\u00eancias. 11 jun. 2021. Dispon\u00edvel em: http://www.abc.org.br/2021/06/11/manifestacao-situacao-dos-periodicos-cientificos-brasileiros/. Acesso em: 28 jun. 2020."]}
Entanglement and Criticality in Quantum Impurity Systems
Creators: name: Hur, Karyn Le
name: Doucet-Beaupre, Philippe
name: Hofstetter, Walter
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate the entanglement between a spin and its environment in impurity systems which exhibit a second-order quantum phase transition. As an application, we employ the spin-boson model, describing a two-level system (spin) coupled to a subohmic bosonic bath with power-law spectral density, ${\cal J}(ω)\propto ω^s$ and $0
description: 4 pages and 5 figures; related to cond-mat/0612095; final version to appear in PRL
Ferrocenylphosphine derivatives of iron and ruthenium cluster carbonyls
Creators: name: Chacon, Stephanie Teresa
Publisher: name: University of British Columbia
Year: 2010

description: The substitution reactions of Fe₃ (CO)₁₂ and Ru₃(CO)₁₂ with the ferrocenylphosphines PBuPhFc , PPh₂Fc , PPhFc₂, PFc₃ and Fe(C₅H₄)₂PPh were carried by initiation with the diphenyl-ketyl radical anion, or using photochemical or thermal conditions. The products Fe(CO)₄L (L=PBuPhFc, PPh₂Fc, PPhFc₂ and PFc₃); Fe₃(CO)₁₁ L (L=PBuPhFc and PPh₂Fc); Fe₃(CO)₁₀L₂, (L=PBuPhFc), Ru(CO)₄(PFc₃), Ru₃(CO)₁₁L (L=PPh₂Fc, PPhFc₂, PFc₃ and Fe(C₅H₄)₂2PPh); Ru₃ (CO)₁₀L₂ (L=PPh₂Fc, PPhFc₂, PFc₃ and Fe(C₅H₄)₂PPh), and Ru₃ (CO)₉L₃ (L=PPh₂Fc and PPhFc₂) were obtained in moderate to high yields with the exception of Ru(CO)₄(PFc₃) which was obtained in a very low yield and characterized by X-ray crystallographic analysis. The best method for the substitution reactions was found to be induction with the diphenylketyl radical anion. Pyrolytic reactions of three of the trimetallic ruthenium derivatives produced high to moderate yields of compounds with interesting spectroscopic data. A structure (XXXI) is proposed for the product obtained from the pyrolysis of Ru₃(CO)₁₀(PPh₂Fc)₂. It contains a ferrocene molecule bridging two metal atoms, a fluxional benzyne ring associated with all three metal atoms, and both doubly and triply bridging phosphido and phosphinidene ligands, respectively. [See Thesis for Diagram]
Commercial Sales Dominated Agricultural Exports in Fiscal Year 1963-64
Creators: name: DeBlois, Eleanor N.
name: DeBlois, Eleanor N.
Publisher: name: Unknown
Year: 1964
Subjects: Agricultural and Food Policy
International Relations/Trade

description: Excerpts from the Report: U.S. agricultural exports rose to an alltime record of $6,074.5 million in the fiscal year 1963-64, 20 percent and nearly $1 billion above the year before. Practically all the increase was in commercial sales for dollars, which were at a record high of $4,512.5 million, about three-fourths of the export total. Factors contributing to the unprecedented increase in agricultural exports for dollars included the continued advance in economic activity in Western Europe and Japan with consequent increases in disposable income; shifts in dietary habits toward stronger demand for meat and livestock consumer products; growth in the livestock industries in these countries, resulting in increased demand for feed grains, oilseeds, and high protein meal; competitive pricing and better quality of U.S. exports; and U.S. market development efforts. Exports under Government-financed programs totaled $1,562.0 million, about $20 million above 1962-63 and about one-fourth of the export total. Sales for foreign currency under Title I of P.L. 480, although slightly below those of 1962-63, made up two-thirds of program shipments. Donations under Title II of P.L. 480 and long-term supply and dollar credit sales under Title IV of P.L. 480 fell below those of a year earlier. Donations through voluntary relief agencies under Title III were nearly one-tenth above 1962-63, and shipments under the barter program nearly doubled.
description: Reprinted from Foreign Agricultural Trade of the United States November-December 1964
The RHIC azimuth quadrupole: "perfect liquid" or gluonic radiation?
Creators: name: Trainor, Thomas A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Large elliptic flow at RHIC seems to indicate that ideal hydrodynamics provides a good description of Au-Au collisions, at least at the maximum RHIC energy. The medium formed has been interpreted as a nearly perfect (low-viscosity) liquid, and connections have been made to gravitation through string theory. Recently, claimed observations of large flow fluctuations comparable to participant eccentricity fluctuations seem to confirm the ideal hydro scenario. However, determination of the azimuth quadrupole with 2D angular autocorrelations, which accurately distinguish ``flow'' (quadrupole) from ``nonflow'' (minijets), contradicts conventional interpretations. Centrality trends may depend only on the initial parton geometry, and methods used to isolate flow fluctuations are sensitive instead mainly to minijet correlations. The results presented in this paper suggest that the azimuth quadrupole may be a manifestation of gluonic multipole radiation.
description: 11 pages, 6 figures
Jupyter-Enabled Astrophysical Analysis for Researchers and Students
Creators: name: Juneau, Stéphanie
name: Olsen, Knut A. G.
name: Nikutta, Robert
name: Jacques, Alice
name: Bailey, Stephen
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The advent of increasingly large and complex datasets has fundamentally altered the way that scientists conduct astronomy research. The need to work closely to the data has motivated the creation of online science platforms, which include a suite of software tools and services, therefore going beyond data storage and data access. We present two example applications of Jupyter as a part of astrophysical science platforms for professional researchers and students. First, the Astro Data Lab is developed and operated by NOIRLab with a mission to serve the astronomy community with now over 1500 registered users. Second, the Dark Energy Spectroscopic Instrument science platform serves its geographically distributed team comprising about 900 collaborators from over 90 institutions. We describe the main uses of Jupyter and the interfaces that needed to be created to embed it within science platform ecosystems. We use these examples to illustrate the broader concept of empowering researchers and providing them with access to not only large datasets but also cutting-edge software, tools, and data services without requiring any local installation, which can be relevant for a wide range of disciplines. Future advances may involve science platform networks, and tools for simultaneously developing Jupyter notebooks to facilitate collaborations.
description: 13 pages, 4 figures. Accepted version. See Computing in Science and Engineering for the final published version: Jupyter-Enabled Astrophysical Analysis Using Data-Proximate Computing Platforms
Induced Surface and Curvature Tensions Equation of State of Hadrons with Relativistic Excluded Volumes and its Relation to Morphological Thermodynamics
Creators: name: Bugaev, K. A.
name: Yakovenko, N. S.
name: Oliinyk, P. V.
name: Nikonov, E. G.
name: Blaschke, D. B.
name: Bravina, L. V.
name: Zabrodin, E. E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: An analytical formula that accurately accounts for the Lorentz contraction of the excluded volume of two relativistic hadrons with hard-core repulsion is worked out. Using the obtained expression we heuristically derive the equation of state of Boltzmann particles with relativistic excluded volumes in terms of system pressure and its surface and curvature tension coefficients. The behavior of effective excluded volumes of lightest baryons and mesons is studied at very high temperatures (particle number densities) and for very large values of degeneracy factors. Several parameterizations of the obtained equation of state demonstrate a universal asymptotics of the effective excluded volume at high particle number densities. It is peculiar, that the found maximal packing fraction $η\simeq 0.75$ of Lorentz contracted particles is very close to the dense packing limit of classical hard spheres of same radius $η_{exc} \approx 0.74$. We show that the developed equation of state is the grand canonical formulation of the morphological thermodynamics approach applied to Lorentz contracted rigid spheres.
description: 15 pages, 3 figures
title: The computational hardness of feature selection in strict-pure synthetic genetic datasets
Creators: name: Mohtasham, Majid Beheshti
Publisher: name: Memorial University of Newofundland
Year: 2019

description: A common task in knowledge discovery is finding a few features correlated with an outcome in a sea of mostly irrelevant data. This task is particularly formidable in genetic datasets containing thousands to millions of Single Nucleotide Polymorphisms (SNPs) for each individual; the goal here is to find a small subset of SNPs correlated with whether an individual is sick or healthy(labeled data). Although determining a correlation between any given SNP (genotype) and a disease label (phenotype) is relatively straightforward, detecting subsets of SNPs such that the correlation is only apparent when the whole subset is considered seems to be much harder. In this thesis, we study the computational hardness of this problem, in particular for a widely used method of generating synthetic SNP datasets. More specifically, we consider the feature selection problem in datasets generated by ”pure and strict” models, such as ones produced by the popular GAMETES software. In these datasets, there is a high correlation between a predefined target set of features (SNPs) and a label; however, any subset of the target set appears uncorrelated with the outcome. Our main result is a (linear-time, parameter-preserving) reduction from the well-known Learning Parity with Noise (LPN) problem to feature selection in such pure and strict datasets. This gives us a host of consequences for the complexity of feature selection in this setting. First, not only it is NP-hard (to even approximate), it is computationally hard on average under a standard cryptographic assumption on hardness on learning parity with noise; moreover, in general it is as hard for the uniform distribution as for arbitrary distributions, and as hard for random noise as for adversarial noise. For the worst case complexity, we get a tighter parameterized lower bound: even in the non-noisy case, finding a parity of Hamming weight at most k is W[1]-hard when the number of samples is relatively small (logarithmic in the number of features). Finally, most relevant to the development of feature selection heuristics, by the unconditional hardness of LPN in Kearns’ statistical query model, no heuristic that only computes statistics about the samples rather than considering samples themselves, can successfully perform feature selection in such pure and strict datasets. This eliminates a large class of common approaches to feature selection.