cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
PERCIEVED ROLES OF PUBLIC HEALTH MESSAGES IN DISEASE SPREAD CONTROL- The Perspective of Nigerians during the Covid-19 Pandemic
Creators: name: Idowu Oluwaseyi
name: Jokotola Prisca
Publisher: name: figshare
Year: 2020
Subjects: subject: 111799 Public Health and Health Services not elsewhere classified
subject: FOS: Health sciences
subject: 209999 Language, Communication and Culture not elsewhere classified
subject: FOS: Languages and literature

description: The goal of this research was to understudy the role of public health messages i.e its dissemination, its acceptability and its current use in managing the covid-19 pandemic as perceived by Nigerians.
Self-waveguiding of relativistic laser pulses in neutral gas channel
Creators: name: Feder, L.
name: Miao, B.
name: Shrock, J. E.
name: Goffin, A.
name: Milchberg, H. M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Accelerator Physics (physics.acc-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We demonstrate that an ultrashort high intensity laser pulse can propagate for hundreds of Rayleigh ranges in a prepared neutral hydrogen channel by generating its own plasma waveguide as it propagates; the front of the pulse generates a waveguide that confines the rest of the pulse. A wide range of suitable initial index structures will support this "self-waveguiding" process; the necessary feature is that the gas density on axis is a minimum. Here, we demonstrate self-waveguiding of pulses of at least $1.5\times10^{17} W/cm^2$ (normalized vector potential $a_0\sim0.3)$ over 10 cm, or $\sim100$ Rayleigh ranges, limited only by our laser energy and length of our gas jet. We predict and observe characteristic oscillations corresponding to mode-beating during self-waveguiding. The self-waveguiding pulse leaves in its wake a fully ionized low density plasma waveguide which can guide another pulse injected immediately following; we demonstrate optical guiding of such a follow-on probe pulse
DNA looping and physical constraints on transcription regulation
Creators: name: Vilar, Jose M. G.
name: Leibler, Stanislas
Publisher: name: arXiv
Year: 2004
Subjects: subject: Subcellular Processes (q-bio.SC)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: DNA looping participates in transcriptional regulation, for instance, by allowing distal binding sites to act synergistically. Here we study this process and compare different regulatory mechanisms based on repression with and without looping. Within a simple mathematical model for the lac operon, we show that regulation based on DNA looping, in addition to increasing the repression level, can reduce the fluctuations of transcription and, at the same time, decrease the sensitivity to changes in the number of regulatory proteins. Looping is thus able to circumvent some of the constraints inherent to mechanisms based solely on binding to a single operator site and provides a mechanism to regulate not only the average properties of transcription but also its fluctuations.
$Large-scale$ thermalization, prethermalization and impact of the temperature in the quench dynamics of two unequal Luttinger liquids
Creators: name: Ruggiero, Paola
name: Foini, Laura
name: Giamarchi, Thierry
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the effect of a quantum quench between two tunnel coupled Tomonaga-Luttinger liquids (TLLs) with different speed of sound and interaction parameter. The quench dynamics is induced by switching off the tunnelling and letting the two systems evolve independently. We fully diagonalize the problem within a quadratic approximation for the initial tunnelling. Both the case of zero and finite temperature in the initial state are considered. We focus on correlation functions associated with the antisymmetric and symmetric combinations of the two TLLs (relevant for interference measurements), which turn out to be coupled due to the asymmetry in the two systems' Hamiltonians. The presence of different speeds of sound leads to multiple lightcones separating different decaying regimes. In particular, in the large time limit, we are able to identify a prethermal regime where the two-point correlation functions of vertex operators of symmetric and antisymmetric sector can be characterized by two emerging effective temperatures, eventually drifting towards a final stationary regime that we dubbed $quasi-thermal$, well approximated at large scale by a thermal-like state, where these correlators become time independent and are characterized by a unique correlation length. If the initial state is at equilibrium at non-zero temperature $T_0$, all the effective temperatures acquire a linear correction in $T_0$, leading to faster decay of the correlation functions. Such effects can play a crucial role for the correct description of currently running cold atoms experiments.
description: Accepted version: title and discussion section modified, one appendix removed
Ultrafast melting and recovery of collective order in the excitonic insulator Ta$_{2}$NiSe$_{5}$
Creators: name: Bretscher, Hope M.
name: Andrich, Paolo
name: Telang, Prachi
name: Singh, Anupam
name: Harnaga, Luminita
name: Sood, Ajay K.
name: Rao, Akshay
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The layered chalcogenide Ta$_{2}$NiSe$_{5}$ has been proposed to host an excitonic condensate in its ground state, a phase that could offer a unique platform to study and manipulate many-body states at room temperature. However, identifying the dominant microscopic contribution to the observed spontaneous symmetry breaking remains challenging, perpetuating the debate over the ground state properties. Here, using broadband ultrafast spectroscopy we investigate the out-of-equilibrium dynamics of Ta$_{2}$NiSe$_{5}$ and demonstrate that the transient reflectivity in the near-infrared range is connected to the system's low-energy physics. We track the status of the ordered phase using this optical signature, establishing that high-fluence photoexcitations can suppress this order. From the sub-50 fs quenching timescale and the behaviour of the photoinduced coherent phonon modes, we conclude that electronic correlations provide a decisive contribution to the excitonic order formation. Our results pave the way towards the ultrafast control of an exciton condensate at room temperature.
Two-point polynomial patterns in subsets of positive density in $\mathbb{R}^n$
Creators: name: Chen, Xuezhi
name: Miao, Changxing
Publisher: name: arXiv
Year: 2024
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 42B20

description: Let $γ(t)=(P_1(t),\ldots,P_n(t))$ where $P_i$ is a real polynomial with zero constant term for each $1\leq i\leq n$. We will show the existence of the configuration $\{x,x+γ(t)\}$ in sets of positive density $ε$ in $[0,1]^n$ with a gap estimate $t\geq δ(ε)$ when $P_i$'s are arbitrary, and in $[0,N]^n$ with a gap estimate $t\geq δ(ε)N^n$ when $P_i$'s are of distinct degrees where $δ(ε)=\exp\left(-\exp\left(cε^{-4}\right)\right)$ and $c$ only depends on $γ$. To prove these two results, decay estimates of certain oscillatory integral operators and Bourgain's reduction are primarily utilised. For the first result, dimension-reducing arguments are also required to handle the linear dependency. For the second one, we will prove a stronger result instead, since then an anisotropic rescaling is allowed in the proof to eliminate the dependence of the decay estimate on $N$. And as a byproduct, using the strategy token to prove the latter case, we extend the corner-type Roth theorem previously proven by the first author and Guo.
description: 18 pages; we added the definition of the operator $T_{s,l}$ appearing in Lemma 2.2
Angular-dependent Magnetoresistance Oscillations in Na$_{0.48}$CoO$_{2}$ Single Crystal
Creators: name: Hu, F.
name: Liu, G. T.
name: Luo, J. L.
name: Wu, D.
name: Wang, N. L.
name: Xiang, T.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report measurements of the c-axis angular-dependent magnetoresistance (AMR) for a Na$_{0.48}$CoO$_{2}$ single crystal, with a magnetic field of 10 T rotating within Co-O planes. Below the metal-insulator transition temperature induced by the charge ordering, the oscillation of the AMR is dominated by a two-fold rotational symmetry. The amplitudes of the oscillation corresponding to the four- and six-fold rotational symmetries are distinctive in low temperatures, but they merge into the background simultaneously at about 25 K. The six-fold oscillation originates naturally from the lattice symmetry. The observation of the four-fold rotational symmetry is consistent with the picture proposed by Choy, et al., that the Co lattice in the charge ordered state will split into two orthorhombic sublattice with one occupied by Co$^{3+}$ ions and the other by Co$^{4+}$ ions. We have also measured the c-axis AMR for Na$_{0.35}$CoO$_{2}$ and Na$_{0.85}$CoO$_{2}$ single crystals, and found no evidence for the existence of two- and four-fold symmetries.
description: 4 pages, 6 figures. Submitted to PRB
Effect of Scheme Transformations on a Beta Function with Vanishing One-Loop Term
Creators: name: Ryttov, Thomas A.
name: Shrock, Robert
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It is commonly stated that because terms in the beta function of a theory at the level of $\ell \ge 3$ loops and higher are scheme-dependent, it is possible to define scheme transformations that can be used to remove these terms, at least in the vicinity of zero coupling. We prove that this is not, in general, possible in the situation where a beta function is not identically zero but has a vanishing one-loop term.
description: 6 pages, latex
Living Life: overlooked aspects of urban employment
Creators: name: Garrett, James L.
name: Garrett, James L.
Publisher: name: Unknown
Year: 2004
Subjects: subject: Labor and Human Capital
subject: Hunger
subject: Livelihoods
subject: Childcare and work
subject: Gender

description: With urban dwellers purchasing 80 percent or more of their food, understanding urban employment is critical to designing policies and programs to address urban hunger and poverty. Reviewing the literature, but also using data from household surveys conducted by the International Food Policy Research Institute (IFPRI) and others in five countries of Latin America, Asia, and Africa, this paper profiles urban employment in developing-country cities. It highlights some often-overlooked aspects of urban conditions, most especially the importance of agriculture, the continuing importance of the formal sector, and seasonality of income, even among those not connected to agriculture. It also examines the connections between poverty and employment; looks at where people work and what they do; and highlights the importance of personal networks, the informal sector, and the concerns of women. Finally, it notes some dynamic forces shaping the future of urban employment and suggests some guidelines for policies and programs.
description: Urban Challenges to Food and Nutrition Security.
La tradition allemande dans la philosophie, de Alain Badiou y Jean-Luc Nancy [Book review]
Creators: name: Sandoval, Rodrigo Y.
Publisher: name: figshare
Year: 2020
Subjects: subject: 220210 History of Philosophy
subject: FOS: Philosophy, ethics and religion

description: Reseña en español del diálogo entre A. Badiou y J.-L. Nancy, editado por Jan Völker y publicado en 2017
Economic performance of exotic dairy cattle under smallholder conditions in the marginal zones of Kenya using three analytical approaches
Creators: name: Kavoi, Mutuku Muendo
name: Hoag, Dana L.
name: Pritchett, James G.
name: Kavoi, Mutuku Muendo
name: Hoag, Dana L.
name: Pritchett, James G.
Publisher: name: Unknown
Year: 2010
Subjects: subject: Institutional and Behavioral Economics
subject: Marginal zones
subject: stochastic frontier
subject: systems analysis
subject: institutional and socio-economic factors

description: Smallholder exotic dairy cattle have been adopted in the dry marginal zones of Kenya from the high potential areas over the last two decades contrary to the opinion of experts. The objective of this study therefore was to evaluate the economic performance of this dairy establishment in the marginal zones. Three approaches were used for the evaluation: the stochastic cost frontier to determine inefficiencies and the causative institutional and socio-economic factors; cost-factor demand systems; and the supply response analyses to determine the elasticity estimates of policy variables. The results from these approaches are supplementary and seem to support the need for government interventions in institutional and socio-economic factors that have a high public good component in order to expand dairy establishment in the marginal zones.
Implementation considerations for "soft" embedded programmable logic cores
Creators: name: Wu, James Cheng-Huan
Publisher: name: University of British Columbia
Year: 2009

description: As integrated circuits become increasingly more complex and expensive, the ability to make post-fabrication changes will become much more attractive. This ability can be realized using programmable logic cores. Currently, such cores are available from vendors in the form of "hard" macro layouts. An alternative approach for fine-grain programmability is possible: vendors supply an RTL version of their programmable logic fabric that can be synthesized using standard cells. Although this technique may suffer in terms of speed, density, and power overhead, the task of integrating such cores is far easier than the task of integrating "hard" cores into an ASIC or SoC. When the required amount of programmable logic is small, this ease of use may be more important than the increased overhead. In this thesis, we identify potential implementation issues associated with such cores, and investigate in depth the area, speed and power overhead of using this approach. Based on this investigation, we attempt to improve the performance of programmable cores created in this manner. Using a test-chip implementation, we identify three main issues: core size selection, I/O connections, and clock-tree synthesis. Compared to a non-programmable design, the soft core approach exhibited an average area overhead of 200X, speed overhead of 10X, and power overhead of 15OX. These numbers are high but expected, given that the approach is subject to limitations of the standard cell library elements of the ASIC flow, which are not optimized for use with programmable logic.
An innovative model for coupled fermion-antifermion pairs
Creators: name: Guvendi, Abdullah
name: Mustafa, Omar
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Understanding the behavior of fermion-antifermion (\(f\overline{f}\)) pairs is crucial in modern physics. These systems, governed by fundamental forces, exhibit complex interactions essential for particle physics, high-energy physics, nuclear physics, and solid-state physics. This study introduces a novel theoretical model using the many-body Dirac equation for \(f\overline{f}\) pairs with an effective position-dependent mass (i.e., \(m \rightarrow m + \mathcal{S}(r)\)) under the influence of an external magnetic field. To validate our model, we show that by modifying the mass with a Coulomb-like potential, \(m(r) = m - α/r\), where \(-α/r\) is the Lorentz scalar potential \(\mathcal{S}(r)\), our results match the well-established energy eigenvalues for \(f\overline{f}\) pairs interacting through the Coulomb potential, without approximation. By applying adjustments based on the Cornell potential (i.e., \(\mathcal{S}(r) = kr - α/r\)), we derive a closed-form energy expression. We believe this unique model offers significant insights into the dynamics of \(f\overline{f}\) pairs under various interaction potentials, with potential applications in particle physics. Additionally, it could be extended to various \(f\overline{f}\) systems, such as positronium, relativistic Landau levels for neutral mesons, excitons in monolayer transition metal dichalcogenides, and Weyl pairs in monolayer graphene sheets.
description: 10 pages, no Figures, To appear in Eur. Phys. J C (2024)
Model-Driven Engineering for Quantum Programming: A Case Study on Ground State Energy Calculation
Creators: name: Polat, Furkan
name: Tuncer, Hasan
name: Moin, Armin
name: Challenger, Moharram
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: Programming Languages (cs.PL)
subject: Software Engineering (cs.SE)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: This study introduces a novel framework that brings together two main Quantum Programming methodologies, gate-based Quantum Computing and Quantum Annealing, by applying the Model-Driven Engineering principles. This aims to enhance the adaptability, design and scalability of quantum programs, facilitating their design and operation across diverse computing platforms. A notable achievement of this research is the development of a mapping method for programs between gate-based quantum computers and quantum annealers which can lead to the automatic transformation of these programs. Specifically, this method is applied to the Variational Quantum Eigensolver Algorithm and Quantum Anneling Ising Model, targeting ground state solutions. Finding ground-state solutions is crucial for a wide range of scientific applications, ranging from simulating chemistry lab experiments to medical applications, such as vaccine development. The success of this application demonstrates Model-Driven Engineering for Quantum Programming frameworks's practical viability and sets a clear path for quantum Computing's broader use in solving intricate problems.
Factors influencing the long-term competitiveness of commercial milk producers: evidence from panel data in East Griqualand, South Africa
Creators: name: Du Toit, J.P.
name: Ortmann, Gerald F.
name: Ramroop, S.
name: Du Toit, J.P.
name: Ortmann, Gerald F.
name: Ramroop, S.
Publisher: name: Unknown
Year: 2010
Subjects: subject: Production Economics
subject: Commercial milk production
subject: competitiveness
subject: panel data

description: This study investigates factors influencing the long-term competitiveness of 11 commercial milk producers from East Griqualand (EG), South Africa using unbalanced panel data for the period 1990 to 2006. Results of a ridge regression analysis show that dairy herd size, the level of farm debt, annual production per cow, technology and policy changes over time, and the ratio of trading income to total milk income influence the long-term competitiveness of these milk producers. To enhance their competitiveness in a deregulated dairy market, relatively small and profitable EG milk producers should consider increasing their herd sizes, as the importance of herd size in explaining competitiveness suggests that size economies exist. All EG milk producers should consider utilising more pasture- and forage-based production systems to lower feed costs and select dairy cattle of superior genetic merit to improve milk yields on pasture.
Modelling efficiency with farm-produced inputs: dairying in KwaZulu-Natal, South Africa
Creators: name: Mkhabela, Thulasizwe S.
name: Piesse, Jenifer
name: Thirtle, Colin G.
name: Vink, Nick
name: Mkhabela, Thulasizwe S.
name: Piesse, Jenifer
name: Thirtle, Colin G.
name: Vink, Nick
Publisher: name: Unknown
Year: 2010
Subjects: subject: Production Economics
subject: Dairy farms
subject: production
subject: frontiers
subject: efficiency

description: This paper models dairy farms in KwaZulu-Natal, South Africa, emphasising the complexities unique to this multi-product industry. Net and gross output approaches to measuring production are discussed and then tested using panel data from 37 dairy farms in KwaZulu-Natal from 1999 and 2007. Production functions for the three outputs: milk production, animals and farm-produced feed, are fitted as a simultaneous system to model the farms’ production activities. This simultaneous model is complemented by a single equation reduced form that is fitted as a frontier, which allows estimation of the relative efficiencies of the individual farms. The results show that, with data this detailed, it is possible to refine the model until it fits very tightly. Indeed, in the gross output model that includes cows there is nothing left to call inefficiency and what was clearly a frontier becomes a mean response function.
National Innovation Systems in Horticulture in Germany and the Netherlands
Creators: name: Menrad, Klaus
name: Gabriel, Andreas
name: Menrad, Klaus
name: Gabriel, Andreas
Publisher: name: Unknown
Year: 2007
Subjects: subject: Agribusiness
subject: Industrial Organization
subject: Research and Development/Tech Change/Emerging Technologies
subject: Innovation system
subject: horticulture
subject: Netherlands
subject: Germany

description: The paper compares the innovation systems of horticulture in Germany and the Netherlands which are both important producers of horticultural products in Europe. Based on the theoretical framework of national systems of innovation the characteristics of firms and important industries, the role of universities and education institutions as well as penetration of innovations related to horticulture are analysed for Germany and the Netherlands.
description: Paper prepared for presentation at the Fifth International Symposium on Management of Technology (ISMOT’07) Hangzhou (China), ZheJiang University, 1st to 3rd June 2007
On Superfield Covariant Quantization in General Coordinates
Creators: name: Gitman, D. M.
name: Moshin, P. Yu.
name: Tomazelli, J. L.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We propose a natural extension of the BRST-antiBRST superfield covariant scheme in general coordinates. Thus, the coordinate dependence of the basic scalar and tensor fields of the formalism is extended from the base supermanifold to the complete set of superfield variables.
description: 11 pages, no figures
The cost of producing milk in the KwaZulu-Natal Midlands of South Africa: a cost-curve approach
Creators: name: Mkhabela, Thulasizwe S.
name: Mndeme, S.H.
name: Mkhabela, Thulasizwe S.
name: Mndeme, S.H.
Publisher: name: Unknown
Year: 2010
Subjects: subject: Production Economics
subject: Cost curve
subject: milk
subject: economies of size
subject: KwaZulu-Natal
subject: South Africa

description: The cost of producing a unit of output is a critical management aspect in the dairy industry, particularly in South Africa. The ability of minimise unit costs of producing milk, while not curtailing output levels, is often a determining factor of the long-term survival of dairy farms in South Africa. In this study, average cost curves showing the variation of unit cost with output are estimated for dairy production in the KwaZulu-Natal Midlands of South Africa, using a panel of 37 farms for the period 1999 to 2007. The results show that economies of size exist, with larger farms able to produce any given level of output at lower costs compared to their smaller counterparts. The study found that the long-run average cost curve (LAC) for the sample of dairy farms is L-shaped rather than U-shaped. The best farmers, in terms of average costs of producing a litre of milk, are found between the 100 000 to about 170 000 litres of milk per year output range and these were found to spend less than R1 per litre.
Economics of Co-Existence Measures of GM and Conventional Maize in Spain and Germany
Creators: name: Petzoldt, Marina
name: Menrad, Klaus
name: Reitmeier, Daniela
name: Petzoldt, Marina
name: Menrad, Klaus
name: Reitmeier, Daniela
Publisher: name: Unknown
Year: 2007
Subjects: subject: Agricultural and Food Policy
subject: Farm Management
subject: Land Economics/Use
subject: Genetically Modified Organisms
subject: Agriculture
subject: Co-Existence

description: In this paper the costs of the two basic co-existence measures buffer strips and discard widths were investigated for the Spanish region Aragon. Furthermore for two Bavarian regions the expenses for buffer strips were analysed. We calculated the costs for each measure considering distances of 20 m, 50 m and 100 m, GM maize adoption rates of 30% and 50% as well as several economic assumptions. The results show an independency of costs from the GM adoption rate. There are however differences in costs with regard to various distances and price differences between GM and non-GM maize.
description: Paper prepared for presentation at the Third International Conference on Coexistence between Genetically Modified (GM) and non-GM based Agricultural Supply Chains (GMCC) Seville (Spain), 20th and 21st November 2007
Clustering of groups of regular customers in horticultural retail stores in Austria
Creators: name: Gabriel, Andreas
name: Menrad, Klaus
name: Gabriel, Andreas
name: Menrad, Klaus
Publisher: name: Unknown
Year: 2008
Subjects: subject: Consumer/Household Economics
subject: Marketing
subject: FOS: Economics and business
subject: Consumer Behaviour
subject: Horticulture
subject: Austria

description: In recent years there were significant changes in the distribution structures in horticulture retail trade. Thereby the decrease of traditional specialized retail gardening traders in favour of the chain stores/garden centres and the DIY sector forces the gardeners to orient their service and their marketing strategies more closely to their customers. A vague knowledge about the needs, wishes and motives of the own customers and their shopping behaviour permits only a "grey-in-grey"-marketing, which does not take into account the specific characteristics of differing customer groups in horticultural retail stores.
description: Paper prepared for presentation at the First Symposium on Horticulture in Europe (SHE), 17th to 20th February 2008 at Vienna/Austria held under the aegis of ALVA, APH, BNL-SHS, DGG, GSHS, IOH, INRA, NJF, PSHS, SECH, SOI and the International Society for Horticultural Science
Ultra high dimensional generalized additive model: Unified Theory and Methods
Creators: name: Yang, Kaixu
name: Maiti, Tapabrata
Publisher: name: arXiv
Year: 2020
Subjects: subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences

description: Generalized additive model is a powerful statistical learning and predictive modeling tool that has been applied in a wide range of applications. The need of high-dimensional additive modeling is eminent in the context of dealing with high through-put data such as genetic data analysis. In this article, we studied a two step selection and estimation method for ultra high dimensional generalized additive models. The first step applies group lasso on the expanded bases of the functions. With high probability this selects all nonzero functions without having too much over selection. The second step uses adaptive group lasso with any initial estimators, including the group lasso estimator, that satisfies some regular conditions. The adaptive group lasso estimator is shown to be selection consistent with improved convergence rates. Tuning parameter selection is also discussed and shown to select the true model consistently under GIC procedure. The theoretical properties are supported by extensive numerical study.
Young Families as buyers of horticultural products
Creators: name: Schops, Johanna
name: Menrad, Klaus
name: Gabriel, Andreas
name: Schops, Johanna
name: Menrad, Klaus
name: Gabriel, Andreas
Publisher: name: Unknown
Year: 2008
Subjects: subject: Consumer/Household Economics
subject: Marketing
subject: FOS: Economics and business
subject: Consumer Behaviour
subject: Horticulture
subject: Germany

description: Often, the well-funded buyers of horticultural products are more than 60 years old and thus it is quite obvious that this customer group will only buy and demand the respective products for a limited time period. Therefore, it is essential for retail trade nurseries - which are continuously loosing market shares in favour of Do-It-Yourself-stores, garden centres and food retailers - to search in time for younger customers in order to sell them plants and other horticultural products for a longer time period. At least part of the target group "young family" earns high household net incomes, is often underrepresented among the buyers of horticultural products and offers high potentials for future sales not least since the families often influence their childrens' prospective consumption behaviour.
description: Paper prepared for presentation at the First Symposium on Horticulture in Europe (SHE), 17th to 20th February 2008 at Vienna/Austria held under the aegis of ALVA, APH, BNL-SHS, DGG, GSHS, IOH, INRA, NJF, PSHS, SECH, SOI and the International Society for Horticultural Science
FESSE
Creators: name: An, Nan
name: Fuzhi Cao
name: Li, Wen
name: Wenli Wang
name: Chunhui Wang
name: Xiang, Min
name: Gao, Yang
name: Binbin Sui
name: Aimin Liang
name: Xiaolin Ning
Publisher: name: Zenodo
Year: 2021
Subjects: Source imaging methods
MEG

description: Here is the code for the paper 'Imaging Somatosensory Cortex Responses Measured by OPM-MEG: Variational Free Energy-based Spatial Smoothing Estimation Approach'.
SOME DEVELOPMENT PERSPECTIVES FOR INDUSTRIAL SECTOR IN UZBEKISTAN
Creators: name: Burkhanov, Aktam
name: Burkhanov, Aktam
Publisher: name: Unknown
Year: 2010
Subjects: subject: Production Economics
subject: Development strategies of industrial enterprises
subject: innovational type of growth
subject: industrial sector of Uzbekistan.

description: This paper discusses theoretical aspects of development strategies for industrial companies of Uzbekistan. The author concludes that support of the applied scientific researches and innovations by the government is the key factor in moving the industrial production of Uzbekistan on higher technological level.
Linear stability of shallow morphodynamic flows
Creators: name: Langham, Jake
name: Woodhouse, Mark J.
name: Hogg, Andrew J.
name: Phillips, Jeremy C.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: It is increasingly common for models of shallow-layer overland flows to include equations for the evolution of the underlying bed (morphodynamics) and the motion of an associated sedimentary phase. We investigate the linear stability properties of these systems in considerable generality. Naive formulations of the morphodynamics, featuring exchange of sediment between a well-mixed suspended load and the bed, lead to mathematically ill-posed governing equations. This is traced to a singularity in the linearised system at Froude number $Fr = 1$ that causes unbounded unstable growth of short-wavelength disturbances. The inclusion of neglected physical processes can restore well posedness. Turbulent momentum diffusion (eddy viscosity) and a suitably parametrised bed load sediment transport are shown separately to be sufficient in this regard. However, we demonstrate that such models typically inherit an associated instability that is absent from non-morphodynamic settings. Implications of our analyses are considered for simple generic closures, including a drag law that switches between fluid and granular behaviour, depending on the sediment concentration. Steady morphodynamic flows bifurcate into two states: dilute flows, which are stable at low $Fr$, and concentrated flows which are always unstable to disturbances in concentration. By computing the growth rates of linear modes across a wide region of parameter space, we examine in detail the effects of specific model parameters including the choices of sediment erodibility, eddy viscosity and bed load flux. These analyses may be used to inform the ongoing development of operational models in engineering and geosciences.
description: 38 pages, 13 figures
Obscuration and Origin of Nuclear X-ray emission in FR I Radio Galaxies
Creators: name: Donato, D.
name: Sambruna, R. M.
name: Gliozzi, M.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present X-ray observations of the nuclear region of 25 Fanaroff-Riley I radio galaxies from the 3CRR and B2 catalogs, using data from the Chandra and XMM archives. We find the presence of a X-ray Central Compact Core (CCCX) in 13/25 sources, in 3/25 sources the detection of a CCCX is uncertain, while in the remaining 9/25 sources no CCCX is found. All the sources are embedded in a diffuse soft X-ray component, generally on kpc-scales, which is in agreement with the halo of the host galaxy and/or with the intracluster medium. The X-ray spectra of the cores are described by a power law with photon indices Gamma=1.1 - 2.6. In 8 sources excess absorption over the Galactic value is detected, with rest-frame column densities N_H^z ~ 10^20 - 10^21 cm^-2; thus, we confirm the previous claim based on optical data that most FRI radio galaxies lack a standard optically-thick torus. We find significant correlations between the X-ray core luminosity and the radio and optical luminosities, suggesting that at least a fraction of the X-ray emission originates in a jet; however, the origin of the X-rays remains ambiguous. If the X-ray emission is entirely attributed to an isotropic, accretion-related component, we find very small Eddington ratios, L_bol/L_Edd ~ 10^-3 - 10^-8, and we calculate the radiative efficiency to be eta ~ 10^-2 - 10^-6, based on the Bondi accretion rates from the spatial analysis. This suggests that radiatively inefficient accretion flows are present in the cores of low-power radio galaxies.
description: 20 pages, 7 figures, accepted for publication in The Astrophysical Journal
An Overview and Comparison of Technical Debt Measurement Tools
Creators: name: Avgeriou, Paris
name: Taibi, Davide
name: Ampatzoglou, Apostolos
name: Fontana, Francesca Arcelli
name: Besker, Terese
name: Chatzigeorgiou, Alexander
name: Lenarduzzi, Valentina
name: Martini, Antonio
name: Nasia Moschou
name: Pigazzini, Ilaria
name: Nyyti Saarimäki
name: Sas, Darius
name: Toledo, Saulo Soares De
name: Tsintzira, Angeliki
Publisher: name: figshare
Year: 2020
Subjects: subject: Applied Computer Science
subject: 80309 Software Engineering
subject: FOS: Computer and information sciences
subject: Computer Software

description: Replication package for Technical Debt management tools.
Sketch-Guided Scenery Image Outpainting
Creators: name: Wang, Yaxiong
name: Wei, Yunchao
name: Qian, Xueming
name: Zhu, Li
name: Yang, Yi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Computer Science and Game Theory (cs.GT)
subject: FOS: Computer and information sciences

description: The outpainting results produced by existing approaches are often too random to meet users' requirement. In this work, we take the image outpainting one step forward by allowing users to harvest personal custom outpainting results using sketches as the guidance. To this end, we propose an encoder-decoder based network to conduct sketch-guided outpainting, where two alignment modules are adopted to impose the generated content to be realistic and consistent with the provided sketches. First, we apply a holistic alignment module to make the synthesized part be similar to the real one from the global view. Second, we reversely produce the sketches from the synthesized part and encourage them be consistent with the ground-truth ones using a sketch alignment module. In this way, the learned generator will be imposed to pay more attention to fine details and be sensitive to the guiding sketches. To our knowledge, this work is the first attempt to explore the challenging yet meaningful conditional scenery image outpainting. We conduct extensive experiments on two collected benchmarks to qualitatively and quantitatively validate the effectiveness of our approach compared with the other state-of-the-art generative models.
description: Accepted by TIP
Echoes in Unidirectionally Rotating Molecules
Creators: name: Xu, Long
name: Tutunnikov, Ilia
name: Zhou, Lianrong
name: Lin, Kang
name: Qiang, Junjie
name: Lu, Peifen
name: Prior, Yehiam
name: Averbukh, Ilya Sh.
name: Wu, Jian
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Abstract We report the experimental observation of molecular unidirectional rotation (UDR) echoes, and analyze their origin and behavior both classically and quantum mechanically. The molecules are excited by two time-delayed polarization-twisted ultrashort laser pulses and the echoes are measured by exploding the molecules and reconstructing their spatial orientation from the detected recoil ions momenta. Unlike alignment echoes which are induced by linearly polarized pulses, here the axial symmetry is broken by the twisted polarization, giving rise to molecular unidirectional rotation. We find that the rotation sense of the echo is governed by the twisting sense of the second pulse even when its intensity is much weaker than the intensity of the first pulse. In our theoretical study, we rely on classical phase space analysis and on three-dimensional quantum simulations of the laser-driven molecular dynamics. Both approaches nicely reproduce the experimental results. Echoes in general, and the unique UDR echoes in particular, provide new tools for studies of relaxation processes in dense molecular gases.
Prospect of measuring the top quark mass through energy correlators
Creators: name: Xiao, Meng
name: Ye, Yulei
name: Zhu, Xinyu
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Reaching a high precision of the top quark mass is an important task of the Large Hadron Collider. We perform a feasibility study of measuring the top quark mass through the three-point energy correlator. The expected sensitivity of the top quark mass in the boosted regime is presented. We further introduce its application to the low top $p_\text{T}$ regime and demonstrate that both the W boson and the top quark masses could be extracted from this single observable. Compared to traditional observables, the energy correlator shows robustness to uncertainties that usually dominate experimental measurements and provides a promising way to improve experimental precision.
description: 10 pages, 6 figures, matches published version
Theoretical determination of polarizability and magnetic susceptibility of neon
Creators: name: Lesiuk, Michał
name: Przybytek, Michał
name: Jeziorski, Bogumił
Publisher: name: arXiv
Year: 2020
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We report theoretical determination of the dipole polarizability of the neon atom, including its frequency dependence. Corrections for the relativistic, quantum electrodynamics, finite nuclear mass, and finite nuclear size effects are taken into account. We obtain the value $α_0=2.66080(36)$ for the static polarizability, and $α_2=2.850(7)$ and $α_4=4.932(14)$ for the first two polarizability dispersion coefficients (Cauchy moments); all values are in atomic units (a.u.). In the case of static polarizability, our result agrees with the best experimental determination [C. Gaiser and B. Fellmuth, Phys. Rev. Lett. 120, 123203 (2018)], but our estimated uncertainty is significantly larger. For the dispersion coefficients, the results obtained in this work appear to be the most accurate to date overall compared to published theoretical and experimental data. We also calculated the static magnetic susceptibility of the neon atom, needed to obtain the refractive index of gaseous neon. Our result, $χ_0 = -8.484(19) \cdot 10^{-5}$ a.u., is about 9% larger in absolute value than the recommended experimental value [CRC Handbook of Chemistry and Physics, CRC Press, 2019, p. 4-145].
Characterisation of Dark Matter in Direct Detection Experiments: Singlino Versus Higgsino
Creators: name: Hiçyılmaz, Yaşar
name: Moretti, Stefano
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We show how the material used in direct detection experiments of Dark Matter (DM), in the presence of a signal of it, can afford one with the possibility of extracting the nature of the underlying candidate. We do so for the case of a $U(1)'$ Supersymmetric Standard Model (USSM) of E$_6$ origin, by exploiting benchmark points over its parameter space that yield either a Singlino- or Higgsino-like neutralino as DM candidate, the latter being defined in presence of up-to-date constraints, from low to high energy and from collider to non-collider experiments. However, as our method is general, we also introduce a model-independent description of our analysis, for the purpose of aiding similar studies in other Beyond the Standard Model (BSM) scenarios. This has been made possible by adapting a rather simple $χ^2$ analysis normally used for signal extraction in direct detection experiments and the procedure has been applied to Xenon, Germanium and Silicon detectors, those showing maximal and complementary sensitivity to gauge- and Higgs-portal induced interactions of DM with their nuclei.
Higher-Order Spectra of Weak Lensing Convergence Maps in Parameterized Theories of Modified Gravity
Creators: name: Munshi, D.
name: McEwen, J. D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We compute the low-$\ell$ limit of the family of higher-order spectra for projected (2D) weak lensing convergence maps. In this limit, these spectra are computed to an arbitrary order using {\em tree-level} perturbative calculations. We use the flat-sky approximation and Eulerian perturbative results based on a generating function approach. We test these results for the lower-order members of this family, i.e. the skew- and kurt-spectra against state-of-the-art simulated all-sky weak lensing convergence maps and find our results to be in very good agreement. We also show how these spectra can be computed in the presence of a realistic sky-mask and Gaussian noise. We generalize these results to three-dimensions (3D) and compute the {\em equal-time} higher-order spectra. These results will be valuable in analyzing higher-order statistics from future all-sky weak lensing surveys such as the {\em Euclid} survey at low-$\ell$ modes. As illustrative examples, we compute these statistics in the context of the {\em Horndeski} and {\em Beyond Horndeski} theories of modified gravity. They will be especially useful in constraining theories such as the Gleyzes-Langlois-Piazza-Vernizzi (GLPV) theories and Degenerate Higher-Order Scalar-Tensor (DHOST) theories as well as the commonly used normal-branch of Dvali-Gabadadze-Porrati (nDGP) model, clustering quintessence models, and scenarios with massive neutrinos.
description: 22 pages, 5 figures
Time-delay interferometry with onboard optical delays
Creators: name: Reinhardt, Jan Niklas
name: Euringer, Philipp
name: Hartwig, Olaf
name: Hechenblaikner, Gerald
name: Heinzel, Gerhard
name: Yamamoto, Kohei
Publisher: name: arXiv
Year: 2024
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Time-delay interferometry (TDI) is a data processing technique for space-based gravitational-wave detectors to create laser-noise-free equal-optical-path-length interferometers virtually on the ground. It relies on the interspacecraft signal propagation delays, which are delivered by intersatellite ranging monitors. Also delays due to onboard signal propagation and processing have a nonnegligible impact on the TDI combinations. However, these onboard delays were only partially considered in previous TDI-related research; onboard optical path lengths have been neglected so far. In this paper, we study onboard optical path lengths in TDI. We derive analytical models for their coupling to the second-generation TDI Michelson combinations and verify these models numerically. Furthermore, we derive a compensation scheme for onboard optical path lengths in TDI and validate its performance via numerical simulations.
The History of the Mysterious Eclipses of KH 15D II. Asiago, Kiso, Kitt Peak, Mt. Wilson, Palomar, Tautenburg and Rozhen Observatories, 1954-97
Creators: name: Johnson, John Asher
name: Winn, Joshua N.
name: Rampazzi, Francesca
name: Barbieri, Cesare
name: Mito, Hiroyuki
name: Tarusawa, Ken-ichi
name: Tsvetkov, Milcho
name: Borisova, Ana
name: Meusinger, Helmut
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The unusual pre-main-sequence binary star named KH 15D undergoes remarkably deep and long-lasting periodic eclipses. Some clues about the reason for these eclipses have come from the observed evolution of the system's light curve over the last century. Here we present UBVRI photometry of KH 15D based on photographic plates from various observatories, ranging in time from 1954 to 1997. The system has been variable at the ~1 mag level since at least 1965. There is no evidence for color variations, with a typical limit of Delta(B-V) < 0.2 mag. We confirm some previously published results that were based on a smaller sample of plates: from approximately 1965 to 1990, the total flux was modulated with the 48-day orbital period of the binary, but the maximum flux was larger, the fractional variations were smaller, and the phase of minimum flux was shifted by almost a half-cycle relative to the modern light curve. All these results are consistent with the recently proposed theory that KH 15D is being occulted by an inclined, precessing, circumbinary ring.
description: 10 pages, 3 figures, 3 tables, accepted for publication in Astronomical Journal
Atomistic modelling of near-crack-tip plasticity
Creators: name: Buze, Maciej
Publisher: name: arXiv
Year: 2020
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 70C20, 70G55, 74A45, 74G25, 74G65

description: An atomistic model of near-crack-tip plasticity on a square lattice under anti-plane shear kinematics is formulated and studied. The model is based upon a new geometric and functional framework of a lattice manifold complex, which ensures that the crack surface is fully taken into account, while preserving the crucial notion of duality. As a result, existence of locally stable equilibrium configurations containing both a crack opening and dislocations is established. Notably, with the boundary in the form of a crack surface accounted for, no minimum separation between a dislocation core and the crack surface or the crack tip is required. The work presented here constitutes a foundation for several further studies aiming to put the phenomenon of near-crack-tip plasticity on a rigorous footing.
description: 35 pages, 6 figures
Potential energy curve for the $a^3Σ_u^+$ state of lithium dimer with Slater-type orbitals
Creators: name: Lesiuk, Michał
name: Musiał, Monika
name: Moszynski, Robert
Publisher: name: arXiv
Year: 2020
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We report state-of-the-art ab initio calculations of the potential energy curve for the $a^3Σ_u^+$ state of the lithium dimer conducted to achieve spectroscopic accuracy ($