cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Solving global problems: Waste to power while creating stakeholder shared value
Creators: name: Chailertpomg, Thaspong
name: Phimolsathien, Thepparat
name: Chailertpomg, Thaspong
name: Phimolsathien, Thepparat
Publisher: name: Unknown
Year: 2018
Subjects: subject: Resource /Energy Economics and Policy
subject: Community participation
subject: corporate social responsibility
subject: energy policies
subject: government policy
subject: stakeholders

description: In 2015, an estimated 1.2 billion people, or 16% of the global population, did not have access to electricity. At the same time, solid waste generation rates have risen fast, reaching 30 million tons in 1980, 200 million tons today, and projected to exceed over 11 million tons per day by 2100. The waste from cities alone is already enough to fill a line of trash trucks 5,000 kilometers long every day. Solutions, therefore, must be found, with Waste to Energy (WtE) conversion a strong contender, which presently represents a $29 billion industry globally. By use of cluster sampling, a sample of 361 individuals was surveyed by use of a 63-item, Likert-type agreement scale questionnaire on the study’s four constructs. A confirmatory factor analysis was run prior to the structural equation model, with analysis undertaken by use of LISREL 9.1. All causal factors in the model were shown to have a positive influence on the creation of shared value (CSV) of the waste management power plant and the local community, with 68% of the variance of the factor affecting CSV (R2). Ranked in importance, the three latent variables were government policy (GP), the waste management power plant (WMPP), and community participation (CP), with a total score of 0.83, 0.37 and 0.36, respectively.
Linearized stability of charged thin-shell wormholes
Creators: name: Eiroa, Ernesto F.
name: Romero, Gustavo E.
Publisher: name: arXiv
Year: 2003
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The linearized stability of charged thin shell wormholes under spherically symmetric perturbations is analized. It is shown that the presence of a large value of charge provides stabilization to the system, in the sense that the constrains onto the equation of state are less severe than for non-charged wormholes.
description: 8 pages, 2 figures; v2: minor changes. Accepted for publication in General Relativity and Gravitation
title: An Analytical, Critical And Comparative Study Of Anglican Mission In The Dioceses Of Nakuru And Mount Kenya East, Kenya, From 1975.
Creators: name: Morgan, James Geoffrey Selwyn
Publisher: name: The Open University
Year: 1997

description: Distinctive and common approaches in the local mission theologies of the Anglican dioceses of Nakuru and Mount Kenya East/Kirinyaga, Kenya during the period from 1975 are compared with other Protestant forms and Roman Catholicism, Pentecostal-type churches and African Instituted Churches. Specific analysis of Anglican liturgy reveals that issues of social justice and political concern have had a major impact on liturgical development and pinpoint the link between mission and worship. The mission of the Anglican Church in Kenya was at its inception Evangelical but has acquired a Catholic emphasis which has affected the use of liturgy. Appropriate theories from Anglican mission and sociology highlight aspects of recent Kenyan history (e.g. independence, decolonialization, ethnic identity, land disputes, development) which influence the course of the CPK (Church of the Province of Kenya) in the areas of Kirinyaga and Nakuru dioceses. The distinctive expression of the East African Revival Movement (Balokole) constitutes areas of commonality in mission theology between Anglicans, Methodists and Presbyterians in the diocesan areas. Anglican distinctiveness is also evident in training contexts and expressed in church leadership and communities by means of the theory and practice of wholistic mission and catechetics in relation to urban and rural cultures. It is argued that a study of the sociology and history of worship aids an understanding of a Kenyan Anglican theory of the church in mission. Various views are critiqued in focusing on the relationship between mission and liturgy. Correlations between the history of liturgical renewal, mission history, and between liturgy and sociology and secularity are examined. These demonstrate the originality of Kenyan Anglican wholistic mission through liturgy. A practical analysis of processes of liturgical change in the CPK, and other churches (using case studies) signals the extent to which the theory and practice of contextualised African Anglican liturgies in the diocesan areas have become indices of the formation of distinctive ecclesiological communities in mission. Therefore the CPK is distinctive in mission among the churches of Kenya through a unique combination of theology, training, ecclesiology, and culture-sensitive liturgy.
Nonlinear Supersymmetric General Relativity and Unity of Nature
Creators: name: Shima, Kazunari
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Nonlinear supersymmetric(NLSUSY) general relativity(GR) is considered and a new fundamental action of the vacuum Einstein-Hilbert(EH)-type is obtained by the Einstein gravity analogue geomtrical arguments on new spacetime inspired by NLSUSY. The new action of NLSUSY GR is unstable and breaks spontaneously to EH action with matter(or New spacetime is unstable and induces spontaneously the phase transition to Riemann spacetime with matter), which may be the real shape of the big bang of the universe and give naturally the unified description of spacetime and matter. Some implications for the low energy particle physics and the cosmology are discussed.
description: Based on the talk given at International Conference on Quantum Theory and Symmetry, September 9-14, Cincinnati University, Ohio, USA
International Agricultural Trade and Negotiations: Coping with a New Landscape
Creators: name: Bureau, Jean-Christophe
name: Jean, Sebastien
name: Bureau, Jean-Christophe
name: Jean, Sebastien
Publisher: name: Unknown
Year: 2013
Subjects: Agribusiness
International Relations/Trade

description: Trade is a key element in food security but international cooperation is necessary for trade to help coping with supply shocks, to spread variations in crop yield and to dampen price volatility. While multilateral trade agreements have provided the foundations for a rule-based system, multilateralism has stalled. New economic and political conditions, in particular the new weight of emerging countries, have complicated the negotiations of a Doha agreement under the WTO. Agriculture plays a special role in the global negotiating game. Developed countries have given up many of their bargaining chips in the previous rounds of negotiation and concessions in agriculture are not sufficient for extracting concessions from emerging countries on services, procurement, and intellectual property that would make a multilateral agreement possible. Non-cooperative policies such as export restrictions are gaining momentum and distorting support is on the rise in emerging countries. With the development of bilateral agreements, there is a genuine risk of a more fragmented trading system that is unable to help coping with food insecurity . A series of research issues are listed that may help to revitalize the Doha negotiation agenda.
Real-Time Nonlinear Model Predictive Control for Motion Generation in Robotic Systems
Creators: name: Carlos, Bárbara Barros
Publisher: name: Zenodo
Year: 2021
Subjects: robotics
real-time nonlinear model predictive control
quadrotor
inverted pendulum
local replanning

description: Robotics has revolutionized several industries across the globe through technologies never seen before. However, society still expects more than what today’s robots are really capable of. To deal with such expectations, innovative algorithms must be translated into viable solutions so that robots can continue to improve labor in workplaces and ordinary people’s lives. Among the most important are motion generation algorithms, whose advancements can solve some of the biggest barriers towards more flexible and safe human-robot interactions and operations in dynamic environments. The developments in optimization algorithms and computer processor technology have led nonlinear model predictive control (NMPC) to gain popularity in robotics as a motion generation technique. The main reason for that is its ability to minimize a cost function while respecting a set of constraints that typically represent the system’s physical and operational limitations. Ultimately, these are the elements that grant NMPC an improved performance compared to classic approaches. Despite being a promising technique, the non-negligible computational burden associated with the online solution of the underlying optimal control problems has decisively limited its roll-out to robotic systems subject to short sampling times and resource-constrained hardware. This thesis proposes multiple tailored algorithms for real-time motion generation in robotic systems based on high-performance implementations of NMPC. The primary computational bottlenecks concern the numerical simulation of the continuous-time nonlinear dynamic models and the online solution of the stemming large yet well-structured nonlinear program. The thesis shows that it is possible to achieve significant speed-ups in solution times while preserving nonlinearities through efficient software implementations that cover standard building blocks from nonlinear programming, tailored quadratic programming solvers, and fast approximate schemes for NMPC. Additionally, a discussion is provided in terms of dynamic modeling. It encompasses the design decisions required to create a model that ex- poses the system limitations so that high-quality motions can be attained due to a more accurate representation. Among the ever-growing plethora of robotic systems, the thesis focuses on the motion generation of a double inverted pendulum and a quadrotor. In particular, two numerical simulations addressing human-robot interaction and operation in dynamic environments and two real-world applications dealing with position control demonstrate a significant improvement in control performance, with solution times in the range of micro- and milliseconds.
Application of discrete dynamic model for the assessment of stability of the world economy development
Creators: name: Kilyachkov, Anatoly
name: Chaldaeva, Larisa
name: Kilyachkov, Nikolay
name: Kilyachkov, Anatoly
name: Chaldaeva, Larisa
name: Kilyachkov, Nikolay
Publisher: name: Unknown
Year: 2018
Subjects: subject: Demand and Price Analysis
subject: Discrete dynamic model
subject: world GDP annual change rate
subject: attractors
subject: Julia set
subject: Mandelbrot set

description: A discrete dynamic model (DDM) is used to describe the pace of the world GDP annual change rate. The Mandelbrot set of DDM was constructed for different time intervals to assess the ability of the world economic system to maintain a steady pace of development. The article shows that the world economic system is in a fundamentally non-equilibrium state. The Mandelbrot set was proposed to use as a generalized image ("pictogram") of the world economy's ability to maintain sustained development rates.
A Note on Curvature Fluctuation of Noncommutative Inflation
Creators: name: Cai, Rong-Gen
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: An elegant approach, which incorporates the effect of the stringy spacetime uncertainty relation, to calculate power spectra of fluctuations during inflation has been suggested by Brandenberger and Ho. In this approach, one of important features is the appearance of an upper bound on the comoving momentum $k$, at which the stringy spacetime uncertainty relation is saturated. As a result, the time-dependent upper bound leads us to choose naturally a set of initial vacua for each mode, in which the stringy uncertainty relation is saturated. In this note, with that set of vacua we calculate power spectrum of curvature fluctuation for a power law inflation, up to the leading order of a parameter describing the spacetime noncommutativity. It turns out that this choice of initial vacuum has a significant effect on the power spectrum of fluctuations.
description: Latex, 13 pages, v2: minor changes, two references added, to appear in PLB
Universality between vector-like and chiral quiver gauge theories: Anomalies and domain walls
Creators: name: Sulejmanpasic, Tin
name: Tanizaki, Yuya
name: Ünsal, Mithat
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study low-energy dynamics of $[SU(N)]^K$ chiral quiver gauge theories in connection with $\mathcal{N}=1$ super Yang-Mills (SYM) theory, and quantum chromodynamics with bi-fundamental fermions (QCD(BF)). These theories can be obtained by $\mathbb{Z}_K$ orbifold projections of $\mathcal{N}=1$ $SU(NK)$ SYM theory, but the perturbative planar equivalence does not extend nonperturbatively for $K\ge 3$. In order to study low-energy behaviors, we analyze these systems using 't~Hooft anomaly matching and reliable semiclassics on $\mathbb{R}^3\times S^1$. Thanks to 't~Hooft anomaly that involves $1$-form center symmetry and discrete chiral symmetry, we predict that chiral symmetry must be spontaneously broken in the confinement phase, and there exist $N$ vacua. Theories with even $K$ possess a physical $θ$ angle despite the presence of massless fermions, and we further predict the $N$-branch structure associated with it; the number of vacua is enhanced to $2N$ at $θ=π$ due to spontaneous $CP$ breaking. Both of these predictions are explicitly confirmed by reliable semiclassics on $\mathbb{R}^3\times S^1$ with the double-trace deformation. Symmetry and anomaly of odd-$K$ theories are the same as those of the ${\cal N}=1$ SYM, and the ones of even-$K$ theories are same as those of QCD(BF). We unveil why there exists universality between vector-like and chiral quiver theories, and conjecture that their ground states can be continuously deformed without quantum phase transitions. We briefly discuss anomaly inflow on the domain walls connecting the vacua of the theory and possible anomaly matching scenarios.
description: 37 pages, 1 figure; (v2) typos fixed, footnotes added, refs added
Food price volatility and domestic stabilization policies in developing countries
Creators: name: Gouel, Christophe
name: Gouel, Christophe
Publisher: name: Unknown
Year: 2013
Subjects: subject: Food Security and Poverty
subject: International Development
subject: agricultural trade policy
subject: food security
subject: price volatility
subject: storage

description: When food prices spike in countries with large numbers of poor people, public intervention is essential to alleviate hunger and malnutrition. For governments, this is also a case of political survival. Government actions often take the form of direct interventions in the market to stabilize food prices, which goes against most international advice to rely on safety nets and world trade. Despite the limitations of food price stabilization policies, they are widespread in develop-ing countries. This paper attempts to untangle the elements of this policy co-nundrum. Price stabilization policies arise as a result of international and do-mestic coordination problems. At the individual country level, it is in the na-tional interest of many countries to adjust trade policies to take advantage of the world market in order to achieve domestic price stability. When countercy-clical trade policies become widespread, the result is a thinner and less reliable world market, which further decreases the appeal of laissez-faire. A similar vi-cious circle operates in the domestic market: without effective policies to pro-tect the poor, such as safety nets, food market liberalization lacks credibility and makes private actors reluctant to intervene, which in turn forces govern-ment to step in. The current policy challenge lies in designing policies that will build trust in world markets and increase trust between public and private agents.
{\em Ab Initio} Calculations of $\bm H_{c2}$ in Type-II Superconductors: Basic Formalism and Model Calculations
Creators: name: Kita, Takafumi
name: Arai, Masao
Publisher: name: arXiv
Year: 2004
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Detailed Fermi-surface structures are essential to describe the upper critical field $H_{c2}$ in type-II superconductors, as first noticed by Hohenberg and Werthamer [Phys. Rev. {\bf 153}, 493 (1967)] and shown explicitly by Butler for high-purity cubic Niobium [Phys. Rev. Lett. {\bf 44}, 1516 (1980)]. We derive an $H_{c2}$ equation for classic type-II superconductors which is applicable to systems with anisotropic Fermi surfaces and/or energy gaps under arbitrary field directions. It can be solved efficiently by using Fermi surfaces from {\em ab initio} electronic-structure calculations. Thus, it is expected to enhance our quantitative understanding on $H_{c2}$. Based on the formalism, we calculate $H_{c2}$ curves for Fermi surfaces of a three-dimensional tight-binding model with cubic symmetry, an isotropic gap, and no impurity scatterings. It is found that, as the Fermi surface approaches to the Brillouin zone boundary, the reduced critical field $h^{*}(T/T_{c})$, which is normalized by the initial slope at $T_{c}$, is enhanced significantly over the curve for the spherical Fermi surface with a marked upward curvature. Thus, the Fermi-surface anisotropy can be a main source of the upward curvature in $H_{c2}$ near $T_c$.
description: 16 pages, 4 figures, results from model calculations included
Does the retirement saving motive foster higher savings? The evidence from the Polish household survey
Creators: name: Marcinkiewicz, Edyta
name: Marcinkiewicz, Edyta
Publisher: name: Unknown
Year: 2018
Subjects: subject: Consumer/Household Economics
subject: Household savings
subject: retirement savings
subject: saving motives
subject: social diagnosis

description: This study focuses on the role of the retirement motive for saving behaviour. It examines empirically the research hypothesis that controlling for a set of economic and sociodemographic individual characteristics, households reporting the retirement motive are more likely to have higher savings compared to households driven exclusively by other motives of saving. Micro data from the three waves (2011, 2013 and 2015) of the Polish household survey Social Diagnosis is used for the study. In an ordered logistic regression framework it proves that the old age saving motive is a significant predictor of the size of savings relative to household income.
Federated Learning with Nesterov Accelerated Gradient
Creators: name: Yang, Zhengjie
name: Bao, Wei
name: Yuan, Dong
name: Tran, Nguyen H.
name: Zomaya, Albert Y.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Federated learning (FL) is a fast-developing technique that allows multiple workers to train a global model based on a distributed dataset. Conventional FL (FedAvg) employs gradient descent algorithm, which may not be efficient enough. Momentum is able to improve the situation by adding an additional momentum step to accelerate the convergence and has demonstrated its benefits in both centralized and FL environments. It is well-known that Nesterov Accelerated Gradient (NAG) is a more advantageous form of momentum, but it is not clear how to quantify the benefits of NAG in FL so far. This motives us to propose FedNAG, which employs NAG in each worker as well as NAG momentum and model aggregation in the aggregator. We provide a detailed convergence analysis of FedNAG and compare it with FedAvg. Extensive experiments based on real-world datasets and trace-driven simulation are conducted, demonstrating that FedNAG increases the learning accuracy by 3-24% and decreases the total training time by 11-70% compared with the benchmarks under a wide range of settings.
description: publised in TPDS. 18 pages, 6 figures
Excitation of negative energy surface magnetohydrodynamic waves in an incompressible cylindrical plasma
Creators: name: Yu, D. J.
name: Nakariakov, V. M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Negative energy wave phenomena may appear in shear flows in the presence of a wave decay mechanism and external energy supply. We study the appearance of negative energy surface waves in a plasma cylinder in the incompressible limit. The cylinder is surrounded by an axial magnetic field and by a plasma of different density. Considering flow inside and viscosity outside the flux tube, we derive dispersion relations, and obtain analytical solutions for the phase speed and growth rate (increment) of the waves. It is found that the critical speed shear for the occurrence of the dissipative instability associated with negative energy waves (NEWs) and the threshold of Kelvin--Helmholtz instability (KHI) depend on the axial wavelength. The critical shear for the appearance of sausage NEW is lowest for the longest axial wavelengths, while for kink waves the minimum value of the critical shear is reached for the axial wavelength comparable to the diameter of the cylinder. The range between the critical speed of the dissipative instability and the KHI threshold is shown to depend on the difference of the Alfvén speeds inside and outside of the cylinder. For all axial wavenumbers, NEW appears for the shear flow speeds lower than the KHI threshold. It is easier to excite NEW in an underdense cylinder than in an overdense one. The negative energy surface waves can be effectively generated for azimuthal number $m=0$ with a large axial wave number and for higher modes ($m>0$) with a small axial wave number.
description: 11 pages, 8 figures, accepted in ApJ
Dectes nigripilus Chemsak & Linsley 1986
Creators: name: Monné, Miguel A.
Publisher: name: Zenodo
Year: 2005
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Cerambycidae
Dectes
Dectes nigripilus

description: 1. Dectes nigripilus Chemsak & Linsley, 1986
Type locality — Mexico, Puebla: Petlalcingo. (UCDC). Distribution — Mexico (Chihuahua, Durango, Zacatecas Jalisco, Michoacán, Guanajuato, Distrito Federal, Mexico, Hidalgo, Oaxaca, Puebla).
 Dectes nigripilus Chemsak & Linsley, 1986: 29; Chemsak et al., 1992: 135 (cat.); Noguera & Chemsak, 1996: 406 (cat.).
description: Published as part of Monné, Miguel A., 2005, Catalogue of the Cerambycidae (Coleoptera) of the Neotropical Region. Part II. Subfamily Lamiinae, pp. 1-760 in Zootaxa 1023 (1) on pages 1-760, DOI: 10.11646/zootaxa.946.1.1, http://zenodo.org/record/5049553
Stochastic viability of second generation biofuel chains: Micro-economic spatial modeling in France
Creators: name: Bamiere, Laure
name: Martinet, Vincent
name: Gouel, Christophe
name: Bamiere, Laure
name: Martinet, Vincent
name: Gouel, Christophe
Publisher: name: Unknown
Year: 2013
Subjects: subject: Agricultural Finance
subject: Resource /Energy Economics and Policy
subject: Biofuel
subject: biomass production
subject: spatial economics
subject: stochastic viability
subject: Monte Carlo simulation

description: To better understand the production of biofuels derived from lignocellulosic feedstock, we investigate the interplay between the agricultural sector and a biofuel facility, at the local level. More specifically, we investigate the economic and technological viability of a bioenergy facility over time in an uncertain economic context using a stochastic viability approach. Two viability constraints are taken into consideration: the facility’s demand for lignocellulosic feedstock has to be satisfied each year and the associated supply cost has to be lower than the facility’s profitability threshold. We assess the viability probability of various strategies the facility can adopt to ensure that the agricultural sector meets its demand for biomass. These supplying strategies are determined at the initial time and define the constant share of total demand met by contracting out the demand to farmers who grow perennial crops. Any remaining demand is met by annual crops or wood. The demand constraints and agricultural price scenarios over the time horizon are introduced in an agricultural and forest biomass supply model, which in turns determines the supply cost per unit of energy and computes the viability probabilities of the supplying strategies. If a facility is to be viable over time, it is best for it to ensure that 100% of its demand is contracted out to farmers supplying perennial dedicated crops. This result is robust to the price context.
Evaluating the evalution of training at Canada Revenue Agency : a descriptive analysis of models
Creators: name: Jackes, Kerri
Publisher: name: The University of British Columbia
Year: 2017

description: Evaluation shares many characteristics with other fields within the social sciences, but has struggled to be recognized as a stand alone academic discipline. Reasons include an overshadowing emphasis on practice rather than theory and modeling. Despite this challenge, much advancement has occurred in evaluation stemming from early works in program evaluation. These methods, theories and early practice have influenced adult education practitioners who borrowed and adapted concepts so to assess workplace training and human resources development (HRD) programs. HRD evaluation literature has seen little advancement since the highly noted inaugural work of Kirkpatrick in 1959. His famous four-level model of has remained largely unchanged, is often used as a benchmark for other HRD models and has influenced other field contributions. Notably, this includes the work Phillips and his message of the ultimate level of evaluation: return on investment (ROI). Many organizations are clamoring to adopt the Phillips process, yet there is little documented evidence that supports the application or the utility of the model. Although ROI seems to translate easiest in the corporate world, many public sector organizations are taking up the challenge as well in a bid to provide results-based evidence in support of accountability. The Canada Revenue Agency (CRA) chose to adopt the Phillips model for its HRD and training evaluation program. The experience and results were documented in the public review of its technical training by the Auditor General of Canada. Overall, CRA garnered positive reviews but were told to not have made adequate use of the Phillips model in providing evidence of effectiveness. The descriptive analysis uncovers other factors, such as staffing, funding and suitability as important in determining the extent in which a model should be applied. In the case of CRA, targets and methods were unrealistic to sustain.
The Casimir Effect and Geometric Optics
Creators: name: Jaffe, R. L.
name: Scardicchio, A.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Quantum Physics (quant-ph)
subject: Condensed Matter (cond-mat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We propose a new approach to the Casimir effect based on classical ray optics. We define and compute the contribution of classical optical paths to the Casimir force between rigid bodies. We reproduce the standard result for parallel plates and agree over a wide range of parameters with a recent numerical treatment of the sphere and plate with Dirichlet boundary conditions. Our approach improves upon proximity force approximation. It can be generalized easily to other geometries, other boundary conditions, to the computation of Casimir energy densities and to many other situations.
description: 5 pages, 3 figures
Inflation persistence in BRICS countries: A quantile autoregressive (QAR) approach
Creators: name: Phiiri, Andrew
name: Phiiri, Andrew
Publisher: name: Unknown
Year: 2018
Subjects: subject: Research Methods/ Statistical Methods
subject: BRICS
subject: Emerging Economies
subject: Inflation persistence
subject: Quantile regression

description: Using the quantile autoregression methodology (QAR), this study contributes to the ever-expanding empirical literature by investigating the persistence in inflation for BRICS countries using quarterly time series data collected between 1996 to 2016. Our empirical analysis reveals two crucial findings. Firstly, for all estimated regressions, inflation persistence in the higher percentiles of the QAR regression exhibits unit root tendencies. Secondly, we note that the global financial crisis did alter the levels of inflation persistence at all quantiles for all BRICS countries. Collectively, we advise monetary authorities in BRICS countries to focus on keeping inflation at low and stable rates.
Nanoscale transient magnetization gratings excited and probed by femtosecond extreme ultraviolet pulses
Creators: name: Ksenzov, D.
name: Maznev, A. A.
name: Unni, V.
name: Bencivenga, F.
name: Capotondi, F.
name: Caretta, A.
name: Foglia, L.
name: Malvestuto, M.
name: Masciovecchio, C.
name: Mincigrucci, R.
name: Nelson, K. A.
name: Pancaldi, M.
name: Pedersoli, E.
name: Randolph, L.
name: Rahmann, H.
name: Urazhdin, S.
name: Bonetti, S.
name: Gutt, C.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We utilize coherent femtosecond extreme ultraviolet (EUV) pulses derived from a free electron laser (FEL) to generate transient periodic magnetization patterns with periods as short as 44 nm. Combining spatially periodic excitation with resonant probing at the dichroic M-edge of cobalt allows us to create and probe transient gratings of electronic and magnetic excitations in a CoGd alloy. In a demagnetized sample, we observe an electronic excitation with 50 fs rise time close to the FEL pulse duration and ~0.5 ps decay time within the range for the electron-phonon relaxation in metals. When the experiment is performed on a sample magnetized to saturation in an external field, we observe a magnetization grating, which appears on a sub-picosecond time scale as the sample is demagnetized at the maxima of the EUV intensity and then decays on the time scale of tens of picoseconds via thermal diffusion. The described approach opens prospects for studying dynamics of ultrafast magnetic phenomena on nanometer length scales.
Gate-controlled spin-splitting in quantum dots with ferromagnetic leads in the Kondo regime
Creators: name: Martinek, J.
name: Sindel, M.
name: Borda, L.
name: Barnas, J.
name: Bulla, R.
name: König, J.
name: Schön, G.
name: Maekawa, S.
name: von Delft, J.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The effect of a gate voltage ($V_g$) on the spin-splitting of an electronic level in a quantum dot (QD) attached to ferromagnetic leads is studied in the Kondo regime using a generalized numerical renormalization group technique. We find that the $V_g$-dependence of the QD level spin-splitting strongly depends on the shape of the density of states (DOS). For one class of DOS shapes there is nearly no $V_g$-dependence, for another, $V_g$ can be used to control the magnitude and sign of the spin-splitting, which can be interpreted as a local exchange magnetic field. We find that the spin-splitting acquires a new type of logarithmic divergence. We give an analytical explanation for our numerical results and explain how they arise due to spin-dependent charge fluctuations.
description: 4 pages, 2 figures
Consistent solution of Einstein-Cartan equations with torsion outside matter
Creators: name: Morawetz, Klaus
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The Einstein-Cartan equations in first-order action of torsion are considered. From Belinfante-Rosenfeld equation special consistence conditions are derived for the torsion parameters relating them to the metric. Inside matter the torsion is given by the spin which leads to an extended Oppenhaimer-Volkov equation. Outside matter a second solution is found besides the torsion-free Schwarzschild one with the torsion completely determined by the metric and vice-versa. This solution is shown to be of non-spherical origin and its uniqueness with respect to the consistence is demonstrated. Unusual properties are discussed in different coordinate systems where the cosmological constant assumes the role of the Friedman parameter in Friedman-Lamaître-Robertson-Walker cosmoses. Parameters are specified where wormholes are possible. Transformations are presented to explore and map regions of expanding and contracting universes to the form of static metrics. The autoparallel equations are solved exactly and compared with geodesic motion. The Weyl tensor reveals that the here found solution is of Petrov-D type.
description: misprints corrected
title: Action Systems, Determinism and the Development of Secure Systems
Creators: name: Sinclair, Jane
Publisher: name: The Open University
Year: 1998

description: This thesis addresses issues arising in the specification and development of secure systems, focusing in particular on aspects of confidentiality. Various confidentiality properties based on limiting the allowed flows of information in a system have previously been proposed. These definitions axe reviewed here and some of the problems inherent in their use axe outlined. Recent work by Roscoe [106] has. provided information flow definitions based on restricting the allowed nondeterminism within the system. These properties axe described in detail, with a range of examples provided to illustrate their use.

This thesis is concerned with providing a new, pragmatic approach to the development of secure systems. Action systems axe chosen as a notation which incorporates both direct representation of system state useful for effective system modelling and the succession of events in a system essential for representation of information flow properties. A definition of nondeterminism and formulations of the deterministic security properties axe developed for action systems. These axe shown to correspond to the original CSP event based definitions.

The emphasis of this work is on the practical application of theoretical results. This is reflected in the case studies in which the preceding work is applied to realistic development situations. This allows the strengths and weaknesses of both the deterministic security conditions and the use of action systems to be assessed. The first study investigates security constraints applied to a distributed message-passing system. Ways of specifying security conditions and the effects of including them at different levels axe explored. The second case study follows through the specification and refinement of a distributed security kernel. A technique for the simplification of security proofs is introduced.
Quantum correlation measurement with single photon avalanche diode arrays
Creators: name: Lubin, Gur
name: Tenne, Ron
name: Antolovic, Ivan Michel
name: Charbon, Edoardo
name: Bruschini, Claudio
name: Oron, Dan
Publisher: name: arXiv
Year: 2019
Subjects: subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Temporal photon correlation measurement, instrumental to probing the quantum properties of light, typically requires multiple single photon detectors. Progress in single photon avalanche diode (SPAD) array technology highlights their potential as high performance detector arrays for quantum imaging and photon number resolving (PNR) experiments. Here, we demonstrate this potential by incorporating a novel on-chip SPAD array with 55% peak photon detection probability, low dark count rate and crosstalk probability of 0.14% per detection, in a confocal microscope. This enables reliable measurements of second and third order photon correlations from a single quantum dot emitter. Our analysis overcomes the inter-detector optical crosstalk background even though it is over an order of magnitude larger than our faint signal. To showcase the vast application space of such an approach, we implement a recently introduced super-resolution imaging method, quantum image scanning microscopy (Q-ISM).
description: 8 pages, 5 figures
New Quasars Detected via Variability in the QUEST1 Survey
Creators: name: Rengstorf, A. W.
name: Mufson, S. L.
name: Abad, C.
name: Adams, B.
name: Andrews, P.
name: Bailyn, C.
name: Baltay, C.
name: Bongiovanni, A.
name: Briceno, C.
name: Bruzual, G.
name: Coppi, P.
name: Della Prugna, F.
name: Emmet, W.
name: Ferrin, I.
name: Fuenmayor, F.
name: Gebhard, M.
name: Hernandez, J.
name: Honeycutt, R. K.
name: Magris, G.
name: Musser, J.
name: Naranjo, O.
name: Oemler, A.
name: Rosenzweig, P.
name: Sabbey, C. N.
name: Sanchez, Ge.
name: Sanchez, Gu.
name: Schaefer, B.
name: Schenner, H.
name: Sinnott, J.
name: Snyder, J. A.
name: Sofia, S.
name: Stock, J.
name: van Altena, W.
name: Vivas, A. K.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: By observing the high galactic latitude equatorial sky in drift scan mode with the QUEST (QUasar Equatorial Survey Team) Phase 1 camera, multi-bandpass photometry on a large strip of sky, resolved over a large range of time scales (from hourly to biennially) has been collected. A robust method of ensemble photometry revealed those objects within the scan region that fluctuate in brightness at a statistically significant level. Subsequent spectroscopic observations of a subset of those varying objects easily discriminated the quasars from stars. For a 13-month time scale, 38% of the previously known quasars within the scan region were seen to vary in brightness and subsequent spectroscopic observation revealed that approximately 7% of all variable objects in the scan region are quasars. Increasing the time baseline to 26 months increased the percentage of previously known quasars which vary to 61% and confirmed via spectroscopy that 7% of the variable objects in the region are quasars. This reinforces previously published trends and encourages additional and ongoing synoptic searches for new quasars and their subsequent analysis. During two spectroscopic observing campaigns, a total of 30 quasars were confirmed, 11 of which are new discoveries and 19 of which were determined to be previously known. Using the previously cataloged quasars as a benchmark, we have found it possible to better optimize future variability surveys. This paper reports on the subset of variable objects which were spectroscopically confirmed as quasars.
description: 22 pages, 3 figures, 4 tables. ApJ, submitted revised version: 19 pages, 4 figures, 2 tables, added clarifications, fixed typos, accepted by ApJ 24 Jan 2004
Exploring the effect of gender and culture on the relationship between self-silencing and depressive symptoms
Creators: name: Davoodi, Elham
name: King, Kylie
name: Singh, Aneeha
name: Jobson, Laura
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Medicine
subject: Molecular Biology
subject: Sociology
subject: FOS: Sociology
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: Science Policy
subject: Mental Health

description: The self-silencing theory explains how cultural norms can expect women to maintain their relationships by silencing their self, which can restrict voice and power in relationships, thereby potentially leading to depression. However, the literature regarding gender differences in self-silencing is inconsistent. In this study, we aimed to investigate gender and cultural differences in self-silencing in an adult community sample. Iranians residing in Australia (men n = 60, women n = 58) and European Australians (men n = 53, women n = 59) completed measures of self-silencing, depression and self-reported gender. There were no cultural or gender differences in self-silencing. Aspects of self-silencing (i.e. greater levels of divided self, r = .33, p < .001, and greater levels of externalised self-perception, r = .40, p < .001) were associated with higher levels of depressive symptoms. Gender moderated the association between care as a self-sacrifice and depressive symptoms, B = .31, SE= .14, 95%CI [.04−,58], t = 2.24, p = .026. Follow-up analyses showed that for women, higher levels of care as self-sacrifice were associated with higher levels of depressive symptoms, B = 0.17, SE = 0.09, t = 1.88, p = .06, 95% CI [<−.001,0.35]. However, for men, higher levels of care as self-sacrifice were associated with lower levels of depressive symptoms, B = −0.13, SE = 0.10, t = 1.32, p = .18, 95% CI [−0.34, 0.67]. Cultural group did not moderate any of the associations. This cross-cultural study offers further insights regarding self-silencing in the context of depressive symptoms and provides initial insights for clinical practice. What is already known about this topic: (1) Studies have shown that self-silencing is related to the health and well-being of women. (2) Self-silencing has been widely researched among undergraduate university students within high-income cultural contexts. (3) This is the first cross-cultural study examining the association between self-silencing and depressive symptoms among European Australian participants and Iranian participants residing in Australia. What the findings of this study add: (1) Our findings demonstrated that gender moderated the association between self-silencing and depressive symptoms, regardless of participants’ cultural background. (2) This research has extended the literature by recruiting community members, rather than university students. (3) Our findings suggest that there may be cultural similarities between these two groups regarding self-silencing.
Anisotropy and inflation in Bianchi I brane worlds
Creators: name: Aguirregabiria, J. M.
name: Chimento, L. P.
name: Lazkoz, Ruth
Publisher: name: arXiv
Year: 2003
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: After a more general assumption on the influence of the bulk on the brane, we extend some conclusions by Maartens et al. and Santos et al. on the asymptotic behavior of Bianchi I brane worlds. As a consequence of the nonlocal anisotropic stresses induced by the bulk, in most of our models, the brane does not isotropize and the nonlocal energy does not vanish in the limit in which the mean radius goes to infinity. We have also found the intriguing possibility that the inflation due to the cosmological constant might be prevented by the interaction with the bulk. We show that the problem for the mean radius can be completely solved in our models, which include as particular cases those in the references above.
description: 10 pages, improved discussion on the likeliness of non-isotropization, completed list of references, matches version to appear in Class. Quantum Grav
High- and low-frequency quasi-periodic oscillations in the X-ray light curves of the black hole transient H1743-322
Creators: name: Homan, Jeroen
name: Miller, Jon M.
name: Wijnands, Rudy
name: van der Klis, Michiel
name: Belloni, Tomaso
name: Steeghs, Danny
name: Lewin, Walter H. G.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a variability study of the black hole candidate and X-ray transient H1743-322 during its 2003/2004 outburst. We analyzed five Rossi X-ray Timing Explorer observations that were performed as part of a multi-wavelength campaign, as well as six observations from the early rise of the outburst. The source was observed in several black hole states and showed various types of X-ray variability, including high frequency quasi-periodic oscillations (QPOs) at 240 Hz and 160 Hz (i.e. with a 3:2 frequency ratio), several types of low frequency QPOs, and strong variations on a time scale of a few hundred seconds. The discovery of high frequency QPOs in H1743-322 supports predictions that these QPOs should be more easily observed in high inclination systems. In one of our observations we observed a transition in count rate and color, during which we were able to follow the smooth evolution of the low-frequency QPOs from type-B to type-A. We classify the X-ray observations and QPOs, and briefly discuss the QPOs in terms of recently proposed models.
description: Submitted to ApJ
Dehn Function of Finitely Presented Metabelian Groups
Creators: name: Wang, Wenhao
Publisher: name: arXiv
Year: 2020
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics

description: In this paper, we compute an upper bound for the Dehn function of a finitely presented metabelian group. In addition, we prove that the same upper bound works for the relative Dehn function of a finitely generated metabelian group. We also show that every wreath product of a free abelian group of finite rank with a finitely generated abelian group can be embedded into a metabelian group with exponential Dehn function.
description: 41 pages, 4 figures. Fix an issue with the trivial case and improve the theorem. Comments are welcome!