cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Quantum dynamical phase transition in a system with many-body interactions
Creators: name: Danieli, Ernesto P.
name: Alvarez, Gonzalo A.
name: Levstein, Patricia R.
name: Pastawski, Horacio M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Chemical Physics (physics.chem-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We introduce a microscopic Hamiltonian model of a two level system with many-body interactions with an environment whose excitation dynamics is fully solved within the Keldysh formalism. If a particle starts in one of the states of the isolated system, the return probability oscillates with the Rabi frequency $ω_{0}$. For weak interactions with the environment $1/τ_{\mathrm{SE}}<2ω_{0},$ we find a slower oscillation whose amplitude decays with a decoherence rate $1/τ_ϕ=1/(2τ_{\mathrm{SE}% })$. However, beyond a finite critical interaction with the environment, $1/τ_{\mathrm{SE}}>2ω_{0}$, the decoherence rate becomes $1/τ_ϕ\propto(ω_{0}^{2})τ_{\mathrm{SE}}$. The oscillation period diverges showing a \emph{quantum dynamical phase transition}to a Quantum Zeno phase.
description: 5 pages, 3 figures, minor changes, fig.2 modified, added references
"WINNERS", "LOSERS" AND "TURNAROUNDS" IN THE SOUTH AFRICAN AGRO-FOOD AND FIBRE INDUSTRY
Creators: name: Van Rooyen, C.J.
name: Esterhuizen, Dirk
name: Van Rooyen, C.J.
name: Esterhuizen, Dirk
Publisher: name: Unknown
Year: 2001
Subjects: Agribusiness

description: South African agribusinesses are now part of the global trading environment and must compete, despite the presence of highly "unequal economic playing fields". Competing under these conditions is hard, with South African agribusinesses involved in an exhausting race of "catch-up" with competitors. However, given a global regulatory environment that entrenches the notions of international competition (on both a regional and global level), to "catch-up" and compete is exactly what agribusiness has to do. An analysis of the agro-food and fibre complex reveals a remarkable achievement, namely that, despite difficult local conditions, the agricultural industry succeeded in operating more competitively for the last eight years. On the primarily level the sugar, groundnuts, oranges, apples, grapes and wool industries establish themselves as "winners" in the global trading environment. On the value added level the maize flour, apple juice, grape juice and raisins industries have distinguished themselves as "winners". Agribusiness in these industries clearly started to focus on the "right stuff". Unfortunately, some "losers" also emerged, while some industries created positive "turnaround" situations.
Conjectures for Large N Superconformal N=4 Chiral Primary Four Point Functions
Creators: name: Dolan, F. A.
name: Nirschl, M.
name: Osborn, H.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: An expression for the four point function for half-BPS operators belonging to the [0,p,0] SU(4) representation in N=4 superconformal theories at strong coupling in the large N limit is suggested for any p. It is expressed in terms of the four point integrals defined by integration over AdS_5 and agrees with, and was motivated by, results for p=2,3,4 obtained via the AdS/CFT correspondence. Using crossing symmetry and unitarity, the detailed form is dictated by the requirement that at large N the contribution of long multiplets with twist less than 2p, which do not have anomalous dimensions, should cancel corresponding free field contributions.
description: 50 pages, 1 figure, uses harvmac, version 2 extra reference, minor changes
Dust-acoustic envelope solitons in an electron depleted plasma
Creators: name: Akter, J.
name: Chowdhury, N. A.
name: Mannan, A.
name: Mamun, A. A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: A theoretical investigation of the modulational instability (MI) of dust-acoustic waves (DAWs) by deriving a nonlinear Schrödinger equation in an electron depleted opposite polarity dusty plasma system containing non-extensive positive ions has been presented. The conditions for MI of DAWs and formation of envelope solitons have been investigated. The sub-extensivity and super-extensivity of positive ions are seen to change the stable and unstable parametric regimes of DAWs. The addition of dust grains causes to change the width of both bright and dark envelope solitons. The findings of this study may be helpful to understand the nonlinear features of DAWs in Martian atmosphere, cometary tail, solar system, and in laboratory experiments, etc.
description: 6 pages, 8 figures
A combined optical/infrared spectral diagnostic analysis of the HH1 jet
Creators: name: Nisini, Brunella
name: Bacciotti, Francesca
name: Giannini, Teresa
name: Massi, Fabrizio
name: Eislöffel, Jochen
name: Podio, Linda
name: Ray, Thomas P.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Complete flux-calibrated spectra covering the spectral range from 6000 A to 2.5 um have been obtained along the HH1 jet and analysed in order to explore the potential of a combined optical/near-IR diagnostic applied to jets from young stellar objects. Important physical parameters have been derived along the jet using various diagnostic line ratios. This multi-line analysis shows, in each spatially unresolved knot, the presence of zones at different excitation conditions, as expected from the cooling layers behind a shock front. In particular, a density stratification in the jet is evident from ratios of various lines of different critical density. In particular, [FeII] lines originate in a cooling layer located at larger distances from the shock front than that generating the optical lines, where the compression is higher and the temperature is declining. The derived parameters were used to measure the mass flux along the jet, adopting different procedures, the advantages and limitations of which are discussed. dM/dt is high in the initial part of the flow but decreases by about an order of magnitude further out. Conversely, the mass flux associated with the warm molecular material is low and does not show appreciable variations along the jet. We suggest that part of the mass flux in the external regions is not revealed in optical and IR lines because it is associated with a colder atomic component, which may be traced by the far-IR [O I]63 um line. Finally, we find that the gas-phase abundance of refractory species is lower than the solar value suggesting that a significant fraction of dust grains may still be present in the jet beam.
description: Accepted on Astronomy & Astrophysics
Ultra High Energy Cosmic Rays from charged black holes. A new theoretical possibility?
Creators: name: Mattei, Alvise
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In General Relativity, there is a new field of activity concerning the study of charged stars. In a recent paper, Ray et al. have shown the possibility that the collapse of a charged star could form a charged black hole before all the charge leaves the system. In this field of view we propose a new model for UHECR and we will show that it is possible to accelerate cosmic rays up to EeV. In this talk we will compute the UHECR flux, the charged black hole density and the energy spectrum associated with them in order to reproduce experimental data. We will see that we need only a small number of these hidden sources in order to account for observed UHECR properties and we will study the limits on charge and mass of black holes.
description: 4 pages, 2 figures
Neutron drip line in the deformed relativistic Hartree-Bogoliubov theory in continuum: Oxygen to Calcium
Creators: name: In, Eun Jin
name: Kim, Youngman
name: Papakonstantinou, Panagiota
name: Hong, Seung-Woo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The location of the neutron drip line, currently known for only the lightest elements, remains a fundamental question in nuclear physics. Its description is a challenge for microscopic nuclear energy density functionals, as it must take into account in a realistic way not only the nuclear potential, but also pairing correlations, deformation effects and coupling to the continuum. The recently developed deformed relativistic Hartree-Bogoliubov theory in continuum (DRHBc) aims to provide a unified description of even-even nuclei throughout the nuclear chart. Here, the DRHBc with the successful density functional PC-PK1 is used to investigate whether and how deformation influences the prediction for the neutron drip-line location for even-even nuclei with 8<=Z<=20, where many isotopes are predicted deformed. The results are compared with those based on the spherical relativistic continuum Hartree-Bogoliubov (RCHB) theory and discussed in terms of shape evolution and the variational principle. It is found that the Ne and Ar drip-line nuclei are different after the deformation effect is included. The direction of the change is not necessarily towards an extended drip line, but rather depends on the evolution of the degree of deformation towards the drip line. Deformation effects as well as pairing and continuum effects treated in a consistent way can affect critically the theoretical description of the neutron drip-line location.
description: 9 pages incl. 7 figures
The Decay of Accreting Triple Systems as Brown Dwarf Formation Scenario
Creators: name: Umbreit, Stefan
name: Burkert, Andreas
name: Henning, Thomas
name: Mikkola, Seppo
name: Spurzem, Rainer
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate the dynamical decay of non-hierarchical accreting triple systems and its implications on the ejection model as Brown Dwarf formation scenario. A modified chain-regularization scheme is used to integrate the equations of motion, that also allows for mass changes over time as well as for momentum transfer from the accreted gas mass onto the bodies. We integrate an ensemble of triple systems within a certain volume with different accretion rates, assuming several prescriptions of how momentum is transferred onto the bodies. We follow their evolution until the systems have decayed. We analyze the end states and decay times of these systems and determine the fraction of Brown Dwarfs formed, their escape speeds as well as the semi-major axis distribution of the formed Brown Dwarf binaries. We find that the formation probability of Brown Dwarfs depends strongly on the assumed momentum transfer which is related to the motion of the gas. Due to ongoing accretion and consequent shrinkage of the systems, the median escape velocity is increased by a factor of 2 and the binary separations are decreased by a factor of 5 compared with non-accreting systems. Furthermore, the obtained semi-major axis distribution drops off sharply to either side of the median, which is also supported by observations. We conclude that accretion and momentum transfer of accreted gas during the dynamical decay of triple systems is able to produce the observed distribution of close binary Brown Dwarfs, making the ejection model a viable option as Brown Dwarf formation scenario.
description: 31 pages, 8 figures, accepted for publication in ApJ
RAQAMLI MAMMOGRAFIYA VA RAQAMLI KO'KRAK TOMOSINTEZI NAZORATI OSTIDA STERIOTOKSIK BIOPSIYA
Creators: name: Ahmadova, Maftuna
Publisher: name: Zenodo
Year: 2024

description: DBT nazorati ostida biopsiya o'tkazilishidan 2 yil oldin va 2 yil o'tgach, biopsiya maqsadlarining turlarini, patologik natijalarni va nomuvofiqlik chastotasini taqqoslang. 2021 yildan 2023 yilgacha stereotaktik raqamli mammografiya (DM) va 2021 yildan 2023 yilgacha DBT tomonidan boshqariladigan biopsiyadan foydalangan holda ko'krakning uchinchi markazidan 9 kalibrli vakuum yordamida barcha yadro biopsiyalari retrospektiv ravishda tahlil qilindi. Barcha mammografik tadqiqotlar DBT yordamida amalga oshirildi. Bemorlarning demografik ma'lumotlari, biopsiya uchun maqsad turi, patologik xulosalar, jarrohlik eksizyon namunalari, agar mavjud bo'lsa, ko'krak zichligi va keyingi ko'rish natijalari qayd etildi. Biopsiyaning maqsadlari va rentgen va patologik tadqiqotlar o'rtasidagi nomuvofiqlik darajasi ikki biopsiya guruhi o'rtasida taqqoslandi. DBT nazorati ostida biopsiyadan oldin va keyin natijalarni o'rganish uchun umumlashtirilgan aralash modellashtirish ishlatilgan.
Quotient triangulated categories
Creators: name: Chen, Xiao-Wu
name: Zhang, Pu
Publisher: name: arXiv
Year: 2006
Subjects: subject: Representation Theory (math.RT)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: For a self-orthogonal module $T$, the relation between the quotient triangulated category $D^b(A)/K^b({\rm add} T)$ and the stable category of the Frobenius category of $T$-Cohen-Macaulay modules is investigated. In particular, for a Gorenstein algebra, we get a relative version of the description of the singularity category due to Happel. Also, the derived category of a Gorenstein algebra is explicitly given, inside the stable category of the graded module category of the corresponding trivial extension algebra, via Happel's functor $F: D^b(A) \longrightarrow T(A)^{\mathbb{Z}}{-}\underline{\rm mod}$.
description: 14 pages. Manu. Math., to appear
Controllably asymmetric beam splitting via gap-induced diffraction channel transition in dual-layer binary metagratings
Creators: name: Fu, Yangyang
name: Tao, Jiaqi
name: Song, Ailing
name: Liu, Youwen
name: Xu, Yadong
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: In this work, we designed and studied a feasible dual-layer binary metagrating, which can realize controllable asymmetric transmission and beam splitting with nearly perfect performance. Owing to ingenious geometry configuration, only one meta-atom is required to design for the metagrating system. By simply controlling air gap between dual-layer metagratings, high-efficiency beam splitting can be well switched from asymmetric transmission to symmetric transmission. The working principle lies on gap-induced diffraction channel transition for incident waves from opposite directions. The asymmetric/symmetric transmission can work in a certain frequency band and a wide incident range.Compared with previous methods using acoustic metasurfaces, our approach has the advantages of simple design and tunable property and shows promise for applications in wavefront manipulation,noise control and acoustic diode.
description: accepted by Frontiers of Physics
ARE WINE CO-OPERATIVES CREATING VALUE?
Creators: name: Hall, John H.
name: Geyser, J.M.
name: Hall, John H.
name: Geyser, J.M.
Publisher: name: Unknown
Year: 2003
Subjects: Agribusiness

description: This article examines the introduction of Economic Value Added (EVA) as a performance measure that South African wine co-operatives can use to determine whether value has been created for members. A detailed explanation of EVA is given, and the components of EVA are calculated. The EVA's of a number of co-operatives have been calculated and analysed. Important trends have been identified. Recommendations have been made based on the conclusions drawn from these results. Finally, opportunities for potential improvement that could arise from using EVA as a performance measure in wine co-operatives are discussed.
The Acquisitions of the Chinese State-Owned Enterprises under the National Merger Control Regimes of the EU Member States: Searching for a Coherent Approach
Creators: name: Svetlicinii, Alexandr
Publisher: name: Market and Competition Law Review
Year: 2019

description: With the rapidly unfolding China’s Belt and Road Initiative (BRI ) and the ongoing reform of the State-owned enterprises (SOEs), the number of overseas acquisitions by the Chinese SOEs in various industrial and services sectors is gradually on the rise. These transactions have raised a number of questions in terms of the assessment of the economic concentrations’ potential impact on competition and challenged the traditional assessment tools employed by the merger control regimes. The paper examines the evolving experience of Chinese SOEs’ acquisitions in the European Union (EU), which are subject to ex ante assessment under both EU and national merger control regimes. The analysis of the merger assessment practice of the EU Commission culminating in the recent conditional approval of the ChemChina/Syngenta merger indicates that the traditional assessment tools, when applied to the acquisitions by Chinese SOEs, may no longer be adequate to grasp the essence of their corporate governance and decision-making. The review of the merger control practice of the national competition authorities (NCAs) also demonstrates the absence of a coherent assessment approach to the cases involving Chinese SOEs, which may lead to the inconsistent enforcement and strengthening of the foreign investment screening on grounds other than market competition.
description: Market and Competition Law Review, v. 2 n. 1 (2018)
Higher Education 2030 - Drivers and effects of longer-term change with respect to teaching, via institutions to education systems. Macromedia Study Report sr-2021-01
Creators: name: Castulus Kolo
name: Masur, Ute
name: Müller-Thum, Reimar
name: Kreulich, Klaus
Publisher: name: figshare
Year: 2021
Subjects: subject: 160506 Education Policy
subject: FOS: Political science

description: Management summary of a symposium on the future of higher education
Exact Propagators for Soliton Potentials
Creators: name: Pupasov, Andrey M.
name: Samsonov, Boris F.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: Using the method of Darboux transformations (or equivalently supersymmetric quantum mechanics) we obtain an explicit expression for the propagator for the one-dimensional Schrödinger equation with a multi-soliton potential.
description: Published in SIGMA (Symmetry, Integrability and Geometry: Methods and Applications) at http://www.emis.de/journals/SIGMA/
Dynamics of perfect fluid Unified Dark Energy models
Creators: name: Beca, L. M. G.
name: Avelino, P. P.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we show that a \emph{one-to-one} correspondence exists between any dark energy model and an equivalent (from a cosmological point of view, in the absence of perturbations) quartessence model in which dark matter and dark energy are described by a single perfect fluid. We further show that if the density fluctuations are small, the evolution of the sound speed squared, $c_s^2$, is fully coupled to the evolution of the scale factor and that the transition from the dark matter to the dark energy dominated epoch is faster (slower) than in a standard $Λ$CDM model if $c_s^2 > 0$ ($c_s^2 < 0$). In particular, we show that the mapping of the simplest quintessence scenario with constant $w_Q \equiv p_Q/ ρ_Q$ into a unified dark energy model requires $c_s^2 < 0$ at the present time (if $w_Q > -1$) contrasting to the Chaplygin gas scenario where one has $c_s^2 > 0$. However, we show that non-linear effects severely complicate the analysis, in particular rendering linear results invalid even on large cosmological scales. Although a detailed analysis of non-linear effects requires solving the full Einstein field equations, some general properties can be understood in simple terms. In particular, we find that in the context of Chaplygin gas models the transition from the dark matter to the dark energy dominated era may be anticipated with respect to linear expectations leading to a background evolution similar to that of standard $Λ$CDM models. On the other hand, in models with $c_s^2 > 0$ the expected transition from the decelerating to the accelerating phase may never happen.
description: 5 pages
Comprehensive Review on Wearable Sweat-Glucose Sensors for Continuous Glucose Monitoring
Creators: name: ZAFAR, HIMA
name: Channa, Asma
name: Jeoti, Varun
name: M. Stojanovic, Goran
Publisher: name: figshare
Year: 2022
Subjects: subject: 90699 Electrical and Electronic Engineering not elsewhere classified
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The incidence of diabetes is increasing at an alarming rate, and regular glucose monitoring is critical in order to manage diabetes. Currently, glucose in the body is measured by an invasive method of blood sugar testing. Blood glucose (BG) monitoring devices measure the amount of sugar in a small sample of blood, usually drawn from pricking the fingertip, and placed on a disposable test strip. Therefore, there is a need for non-invasive continuous glucose monitoring, which is possible using a sweat sensor-based approach. As sweat sensors have garnered much interest in recent years, this study attempts to summarize recent developments in non-invasive continuous glucose monitoring using sweat sensors based on different approaches with an emphasis on the devices that can potentially be integrated into a wearable platform. Numerous research entities have been developing wearable sensors for continuous blood glucose monitoring, however, there are no commercially viable, non-invasive glucose monitors on the market at the moment. This review article provides the state-of-the-art in sweat glucose monitoring, particularly keeping in sight the prospect of its commercialization. The challenges relating to sweat collection, sweat sample degradation, person to person sweat amount variation, various detection methods, and their glucose detection sensitivity, and also the commercial viability are thoroughly covered.
Search Design Policy, Digital Disruption and Competition Law
Creators: name: Falce, Valeria
name: Granieri, Massimiliano
Publisher: name: Market and Competition Law Review
Year: 2017

description: It is debatable whether traditional competition law tools and remedies are able to deal with the digital disruption and whether it is desirable to adjust or even replace categories that have proven to be mainly suited to tackle anticompetitive conducts associated with stable innovations in market where static competition prevails. From a bottom-up perspective, such Grand Question could well be addressed looking at the European Google Shopping case, just adopted at EU level, that will be analysed below with the aim of assessing whether and to which extent the positive antitrust toolbox is flexible enough to effectively cope with the data-driven era.
description: Market and Competition Law Review, v. 1 n. 2 (2017)
ARE THE EFFECTS OF THE MACROECONOMY AND SOCIAL POLICIES ON POVERTY DIFFERENT IN RURAL AMERICA?
Creators: name: Gundersen, Craig
name: Gundersen, Craig
Publisher: name: Unknown
Year: 2005
Subjects: Food Security and Poverty

description: The macroeconomy and social policies can have substantial influences on poverty in the United States. In this paper, I investigate whether these influences differ across metro and nonmetro areas. To do so, using a 16-year panel of state-level data, I estimate state and year fixed effects models separately for metro and nonmetro areas to see if the effects of the macroeconomy and social policies differ between these two areas. These models are estimated using two measures- the poverty rate and the squared poverty gap - and by family type. I find that cyclical forces have a much stronger effect on the poverty rate in nonmetro areas in comparison to metro areas but the effects are similar for the squared poverty gap; wage growth has a pronounced effect on poverty in metro areas but no effect in nonmetro areas; and state-level social policies have slightly larger effects in nonmetro areas but the effects are small.
Soft-core meson-baryon interactions. II. $πN$ and $K^+ N$ scattering
Creators: name: Polinder, H.
name: Rijken, Th. A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The $πN$ potential includes the t-channel exchanges of the scalar-mesons $σ$ and f_0, vector-meson $ρ$, tensor-mesons f_2 and f_2' and the Pomeron as well as the s- and u-channel exchanges of the nucleon N and the resonances $Δ$, Roper and S_{11}. These resonances are not generated dynamically. We consider them as, at least partially, genuine three-quark states and we treat them in the same way as the nucleon. The latter two resonances were needed to find the proper behavior of the phase shifts at higher energies in the corresponding partial waves. The soft-core $πN$-model gives an excellent fit to the empirical $πN$ S- and P-wave phase shifts up to T_{lab}=600 MeV. Also the scattering lengths have been reproduced well and the soft-pion theorems for low-energy $πN$ scattering are satisfied. The soft-core model for the $K^+ N$ interaction is an SU_f(3)-extension of the soft-core $πN$-model. The $K^+ N$ potential includes the t-channel exchanges of the scalar-mesons a_0, $σ$ and f_0, vector-mesons $ρ$, $ω$ and $ϕ$, tensor-mesons a_2, f_2 and f_2' and the Pomeron as well as u-channel exchanges of the hyperons $Λ$ and $Σ$. The fit to the empirical $K^+ N$ S-, P- and D-wave phase shifts up to T_{lab}=600 MeV is reasonable and certainly reflects the present state of the art. Since the various $K^+ N$ phase shift analyses are not very consistent, also scattering observables are compared with the soft-core $K^+ N$-model. A good agreement for the total and differential cross sections as well as the polarizations is found.
description: 24 pages, 20 PostScript figures, revtex4, submitted to Phys. Rev. C
Trabalho partilhado entre famílias de alunos com dificuldade intelectual e desenvolvimental e os professores: a pertinência e a atualidade
Creators: name: Almeida, Celeste Torres
name: Ribeiro, Célia
name: Simões, Cristina
Publisher: name: Gestão e Desenvolvimento
Year: 2011

description: Conhecer a forma como as famílias de alunos com Dificuldade Intelectual e Desenvolvimental (DID) veem a interação com os professores de educação especial e do ensino regular e como estes dão resposta às suas necessidades, adequam os procedimentos, respostas educativas e apoios, tendo sempre em mente favorecer o crescimento e desenvolvimento destes alunos, foi o objetivo central deste estudo. As mudanças que, de um modo geral, se vão operando, decorrem de vários fatores: de ordem política, social, económica, judicial, científica e humanitária. Esta problemática assume uma pertinência atual, pois a própria evolução do apoio a alunos com Necessidades Educativas Especiais (NEE ) e suas famílias, em ambientes menos restritivos, coloca novos desafios à escola do ensino regular no que se refere às formas de interagir e colaborar com estas. Contudo, esta mudança só será produtiva e geradora de sucesso, se a encararmos enquanto processo partilhado, própria de uma organização flexível e que pretendemos inclusiva. Através de um estudo de tipo qualitativo, realizamos nove entrevistas a famílias responsáveis por alunos com DID, distribuídas pela zona centro, nomeadamente de agrupamentos de escolas dos distritos de Viseu, Coimbra e Aveiro. Das conclusões retiradas deste estudo, e em termos genéricos, podemos dizer que a interação dos dois profissionais de educação com as famílias revelou um notório contraste relativamente a procedimentos e práticas.
description: Gestão e Desenvolvimento, n. 19 (2011)
DOES ECONOMIC VULNERABILITY DEPEND ON PLACE OF RESIDENCE? ASSET POVERTY ACROSS THE RURAL-URBAN CONTINUUM
Creators: name: Fisher, Monica G.
name: Weber, Bruce A.
name: Fisher, Monica G.
name: Weber, Bruce A.
Publisher: name: Unknown
Year: 2004
Subjects: Food Security and Poverty

description: This paper uses Panel Study of Income Dynamics data for 1989, 1994, and 1999 to examine why some U.S. households are asset poor; that is, why households have insufficient resources to invest in their future or to sustain household members at a basic level during times of economic disruption. The study contributes to an improved understanding of asset poverty's correlates by examining the influence of place of residence; the extant literature has focused on individual-level explanations. We estimate a random-effects logistic model of the probability that an individual is asset poor at a given point in time as a function of household-level (e.g. age, gender, race of the household head and family structure) and place-level (regional and rural-urban continuum) variables. The central finding of the paper is that place of residence is an important determinant of asset poverty, above and beyond the influence of household characteristics. We find that living in a central metropolitan county and in a nonmetropolitan area is associated with a higher risk of being asset poor, all else being equal. Implications for future research are discussed.
The dynamics of critical Kauffman networks under asynchronous stochastic update
Creators: name: Greil, Florian
name: Drossel, Barbara
Publisher: name: arXiv
Year: 2005
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We show that the mean number of attractors in a critical Boolean network under asynchronous stochastic update grows like a power law and that the mean size of the attractors increases as a stretched exponential with the system size. This is in strong contrast to the synchronous case, where the number of attractors grows faster than any power law.
description: submitted to PRL
The Role of Innovation in the Analysis of Abuse of Dominance in Digital Markets: The Analysis of Chosen Practices of Google Search
Creators: name: Mäihäniemi, Beata
Publisher: name: Market and Competition Law Review
Year: 2019

description: Competition investigations in digital markets focus increasingly on future markets, and incentives to invest and innovate play here a larger role than in traditional "brick and mortar" industries. the article analyses the role of innovation in cases of abuse of dominance in digital markets on two levels. The first level involves the strength of incentives to invest and innovate of a digital monopolist - would he have less or more incentives to innovate and prefer to resort to practices that foreclose his competitors or leverage his market power to adjacent markets to keep its dominant position on the market? The second level identifies concrete phases of the competition analysis in which innovation considerations are contemplated in digital markets, such as objective justifications or assessing the effect of the practice on consumer welfare. Toe analysis of the role of innovation in the assessment of alleged anticompetitive abuses is conducted on the example of two concerns expressed by the EC in recent investigations into practices of Google Search, namely (1) search bias and (2) restrictions on portability of advertising data to competing advertising platforms.
description: Market and Competition Law Review, v. 1 n. 1 (2017)
The initiation of a solar streamer blowout coronal mass ejection arising from the streamer flank
Creators: name: Zheng, Ruisheng
name: Chen, Yao
name: Wang, Bing
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: Streamer blowout (SBO) coronal mass ejections (CMEs) represent a particular class of CMEs that are characterized by a gradual swelling of the overlying streamer and a slow CME containing a flux-rope structure. SBO CMEs arising from the streamer flank fall into a special category of SBO CMEs involving three lower arches under the higher streamer arcade. However, the initiation mechanism for this special category of SBO CMEs remains elusive, due to the observational limitations. Here we report critical observations of a SBO CME associated with the eruption of a polar crown filament that originated from the streamer flank. The filament slowly rose toward the solar equator with the writhing motion, and underwent a sudden acceleration before its eruption. Interestingly, during the rising, the filament fields experienced gradual external reconnections, which is evidenced by the dip-shaped bottom of the enveloping flux-rope structure changing from a smooth concave, the slow inflows ($\sim$1.8 km s$^{-1}$) from both the filament fields and the coronal loops beneath, and the persistent brightenings around the interface between the filament fields and the coronal loops beneath. The newly formed lower loops at the filament source and the Y-shaped structure in the stretched tail fields indicate the internal reconnections for the filament eruption. The clear signatures of the external and internal reconnections shed light on the initiation mechanisms of SBO CMEs.
URBAN AND RURAL DIFFERENCES IN UTILIZATION OF STATE EARNED INCOME TAX CREDIT PROGRAMS: MINNESOTA'S EXPERIENCE
Creators: name: Hirasuna, Donald P.
name: Stinson, Thomas F.
name: Hirasuna, Donald P.
name: Stinson, Thomas F.
Publisher: name: Unknown
Year: 2004
Subjects: Food Security and Poverty

description: This paper examines utilization rates of Minnesota's earned income tax credit program by households on welfare from 1992 through 1999. We examine urban and rural differences in the rate of filing an income tax return and receiving the earned income tax credit. Tabulations show that urban areas have the lowest utilization rates, but are catching up in both income tax filing rates and earned income credit receipt rates. Regression analyses identify correlates to urban-rural differences. A modeling exercise examines how urban and rural households might respond to a 10 percent increase in the credit. Finally, policy suggestions are offered, which are relevant to urban and rural areas and are appropriate for other states.
Online Supplement S1 - for Hillen et al.
Creators: name: Hillen, Marij A.
name: Lehmann, Vicky
Publisher: name: Zenodo
Year: 2021
Subjects: Trust
Physician-patient relationship
Second opinion
Communication
Referral and consultation
Oncology

description: Online Supplement S1: SO-COM study coding scheme (part B: about the referring oncologist)
POVERTY AND PLACE: A CRITICAL REVIEW OF RURAL POVERTY LITERATURE
Creators: name: Weber, Bruce A.
name: Jensen, Leif
name: Weber, Bruce A.
name: Jensen, Leif
Publisher: name: Unknown
Year: 2004
Subjects: Food Security and Poverty

description: Poverty rates are highest in the most urban and most rural areas of the United States, and are higher in non-metropolitan (nonmetro) than metropolitan (metro) areas, yet rural poverty remains relatively obscured from mainstream political and popular attention. This fact has motivated considerable research by rural social scientists on the relationship between poverty and place generally, and rural-urban differences in poverty, in particular. We provide a critical review of the literature on rural poverty, paying particular attention to methodogical and statistical challenges facing quantitative analyses. This body of research confirms the higher prevalence of poverty in nonmetro areas, and finds that while both compositional (individual) and contextual (structural) factors are at play, a complete explanation remains elusive. We note endogenous membership, omitted variable, and other challenges facing researchers, and conclude with suggestions for further research.
Second generation Sikh adolescent males : a grounded theory model of self and identity construction
Creators: name: Sidhu, Kamaljit Kaur
Publisher: name: University of British Columbia
Year: 2009

description: Empirical research indicates that the adolescent years are critical in the development of a coherent sense of self and the subsequent emergence of identity. The construction of a sense of self and identity can be especially complex for children of South Asian immigrants in Canada. These adolescents are similar to all other yOuth in that they share the same biological and cognitive changes during this period of development. Yet, minority youth are unique in that their identity development is embedded in their ethnicity, status as minority group members, and the process of acculturation. The effects of these contextual factors have not been given due attention in the identity development literature. In this study, I examined self and identity construction among one specific subgroup of South Asians in Canada, second generation Sikh adolescent males! The grounded theory method (Glaser & Strauss, 1967; Strauss & Corbin, 1990, 1998) was used to examine the construction of a sense of self and identity of second generation Sikh adolescent males. Through audiotaped, semi-structured interviews in English and Panjabi, 20 Sikh males aged 16 to 19 years were asked to describe how they were constructing a sense of who they are. Transcribed interviews were systematically analysed to develop a model of this process. Resulting from this analysis, the core process in defining a sense of self and identity is being strong enough to stay on track. Three life scripts are incorporated in the construction of the track: the Panjabi ethnic sociocultural script, the Sikh religious/spiritual script, and the dominant culture sociocultural script. The initial track is shaped through parents' selective integration of elements of the Panjabi ethnic script and the Sikh religious/spiritual script. As Sikh males become socialized in the mainstream context, inconsistent elements of all three scripts are negotiated in the reconstruction of the track and maintenance of a track. This reiterative process is affected by issues of striving to be set, managing visibility, belonging while avoiding exclusion, and being guided versus doing it alone. As each young Sikh man negotiates discrepant elements of the three scripts and is confronted with developmental tasks of getting a good education, acquiring a prosperous career, becoming married, and having children, his sense of who he is and who he is becoming becomes further integrated. The model articulates how the construction of a sense of self and identity is embedded in the life contexts of second generation adolescent Sikh males. Implications for theory as well as intervention by mental health professionals and educators are presented.
A grilagem de terras face ao land grabbing: notas para uma História Transnacional da Questão Agrária no Brasil (1964-1985)
Creators: name: Oliveira, Júlio Ernesto Souza De
Publisher: name: Zenodo
Year: 2020
Subjects: Grilagem de terras
Land grabbing
Ditadura civil-militar brasileira

description: Campo de estudo procedente das últimas duas décadas, mas de anterior exercício, a História Transnacional vem sendo cada vez mais discutida no âmbito da História Social. A História Agrária, por sua vez, ainda se mantém bastante centrada nas discussões nacionais de acesso à propriedade da terra e dos processos de resistência camponesa frente à grilagem de terras. Como interlocução entre os dois campos, observaremos a categoria land grabbing em suas bases, apontando que o processo de transnacionalização da propriedade da terra, ao menos no Brasil, vem ocorrendo desde a segunda metade do século XX, durante a ditadura civil-militar brasileira (1964-1985).
Non-Gaussianity Detection of EEG Signals Based on a Multivariate Scale Mixture Model for Diagnosis of Epileptic Seizures
Creators: name: Furui, Akira
name: Onishi, Ryota
name: Takeuchi, Akihito
name: Akiyama, Tomoyuki
name: Tsuji, Toshio
Publisher: name: arXiv
Year: 2020
Subjects: subject: Signal Processing (eess.SP)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Physical sciences

description: Objective: The detection of epileptic seizures from scalp electroencephalogram (EEG) signals can facilitate early diagnosis and treatment. Previous studies suggested that the Gaussianity of EEG distributions changes depending on the presence or absence of seizures; however, no general EEG signal models can explain such changes in distributions within a unified scheme. Methods: This paper describes the formulation of a stochastic EEG model based on a multivariate scale mixture distribution that can represent changes in non-Gaussianity caused by stochastic fluctuations in EEG. In addition, we propose an EEG analysis method by combining the model with a filter bank and introduce a feature representing the non-Gaussianity latent in each EEG frequency band. Results: We applied the proposed method to multichannel EEG data from twenty patients with focal epilepsy. The results showed a significant increase in the proposed feature during epileptic seizures, particularly in the high-frequency band. The feature calculated in the high-frequency band allowed highly accurate classification of seizure and non-seizure segments [area under the receiver operating characteristic curve (AUC) = 0.881] using only a simple threshold. Conclusion: This paper proposed a multivariate scale mixture distribution-based stochastic EEG model capable of representing non-Gaussianity associated with epileptic seizures. Experiments using simulated and real EEG data demonstrated the validity of the model and its applicability to epileptic seizure detection. Significance: The stochastic fluctuations of EEG quantified by the proposed model can help detect epileptic seizures with high accuracy.
TRICKLING DOWN: DOES LOCAL JOB GROWTH REDUCE POVERTY?
Creators: name: Crandall, Mindy S.
name: Weber, Bruce A.
name: Crandall, Mindy S.
name: Weber, Bruce A.
Publisher: name: Unknown
Year: 2005
Subjects: Food Security and Poverty

description: Was local job growth a significant determinant of poverty reduction between 1990 and 2000? This research takes advantage of newly available data and techniques to explore the job growth on tract-level poverty reduction. Spatial corrections to the model allow for more accurate identification of the significant determinants of poverty reduction across the United States. Results indicate that job growth is a highly significant predictor of poverty reduction, though its effect is modest. While spatial models didn't materially affect the regression coefficients, significant gains in model explanatory power were seen when using a spatial model as compared to OLS.
Excited hadrons on the lattice: Mesons
Creators: name: Burch, Tommy
name: Gattringer, Christof
name: Glozman, Leonid Ya.
name: Hagen, Christian
name: Lang, C. B.
name: Schäfer, Andreas
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present results for masses of excited mesons from quenched calculations using chirally improved quarks at pion masses down to 350 MeV. The key features of our analysis are the use of a matrix of correlators from various source and sink operators and a basis which includes quark sources with different spatial widths, thereby improving overlap with states exhibiting radial excitations.
description: 8 pages, 8 figures; version accepted to PRD
Porosity properties of porous ceramic substrates added with zinc and magnesium material
Creators: name: Bouras, D.
name: Mecif, A.
name: Barille, R.
name: Harabi, A.
name: Zaabat, M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Ceramic based materials covered with a mixture of mullite and zircon on the top, strengthened by the addition of zinc and magnesium compounds at different rates (37 % and 50 %) and made by a co-precipitation method are studied. The thermally treated and shaped materials prepared in the shape of cylindrical samples were modified to obtain different porosities. The addition of zinc to the ceramic based material leads to a significant increase and control of the density of porosity compared to the addition of magnesium. The porosity of all the materials was characterized. The permeability characteristics and the ability for all the pellets to absorb water until the saturation were also studied as a function of the porosity.
description: 27 pages, 9 figures
Giant viscoelasticity near Mott criticality in PbCrO3 with large lattice anomalies
Creators: name: Wang, Shanmin
name: Chen, Jian
name: Wu, Liusuo
name: Zhao, Yusheng
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Coupling of charge and lattice degrees of freedom in materials can produce intriguing electronic phenomena, such as conventional superconductivity where the electrons are mediated by lattice for creating supercurrent. The Mott transition, which is a source for many fascinating emergent behaviors, is originally thought to be driven solely by correlated electrons with an Ising criticality. Recent studies on the known Mott systems have shown that the lattice degree of freedom is also at play, giving rise to either Landau or unconventional criticality. However, the underlying coupling mechanism of charge and lattice degrees of freedom around the Mott critical endpoint remains elusive, leading to difficulties in understanding the associated Mott physics. Here we report a study of Mott transition in cubic PbCrO3 by measuring the lattice parameter, using high-pressure x-ray diffraction techniques. The Mott criticality in this material is revealed with large lattice anomalies, which is governed by giant viscoelasticity that presumably results from a combination of lattice elasticity and electron viscosity. Because of the viscoelastic effect, the lattice of this material behaves peculiarly near the critical endpoint, inconsistent with any existing university classes. We argue that the viscoelasticity may play as a hidden degree of freedom behind the Mott criticality.
description: 12 pages main text including 3 figures. 20 pages suppporting material
Local distinguishability of quantum states in infinite dimensional systems
Creators: name: Ogata, Yoshiko
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate local distinguishability of quantum states by use of the convex analysis about joint numerical range of operators on a Hilbert space. We show that any two orthogonal pure states are distinguishable by local operations and classical communications, even for infinite dimensional systems. An estimate of the local discrimination probability is also given for some family of more than two pure states.