cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Beating of the oscillations in the transport coefficients of a one-dimensionally periodically modulated two-dimensional electron gas in the presence of spin-orbit interaction
Creators: name: Wang, X. F.
name: Vasilopoulos, P.
name: Peeters, F. M.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Transport properties of a two-dimensional electron gas (2DEG) are studied in the presence of a perpendicular magnetic field $B$, of a {\it weak} one-dimensional (1D) periodic potential modulation, and of the spin-orbit interaction (SOI) described only by the Rashba term. In the absence of the modulation the SOI mixes the spin-up and spin-down states of neighboring Landau levels into two new, unequally spaced energy branches. The levels of these branches broaden into bands in the presence of the modulation and their bandwidths oscillate with the field $B$. Evaluated at the Fermi energy, the $n$-th level bandwidth of each series has a minimum or vanishes at different values of the field $B$. In contrast with the 1D-modulated 2DEG without SOI, for which only one flat-band condition applies, here there are two flat-band conditions that can change considerably as a function of the SOI strength $α$ and accordingly influence the transport coefficients of the 2DEG. The phase and amplitude of the Weiss and Shubnikov-de Haas (SdH) oscillations depend on the strength $α$. For small values of $α$ both oscillations show beating patterns. Those of the former are due to the independently oscillating bandwidths whereas those of the latter are due to modifications of the density of states, exhibit an even-odd filling factor transition, and are nearly independent of the modulation strength. For strong values of $α$ the SdH oscillations are split in two.
ATMO-ACCESS D3.2 Report on modalities for co-funding physical and remote access with national stakeholders
Creators: name: Wandinger, Ulla
Publisher: name: Zenodo
Year: 2024

description: One of the objectives of ATMO-ACCESS is to identify the most suitable conditions forestablishing sustainable access procedures for distributed atmospheric researchinfrastructures (RIs) across the EU. The goal is to define clear procedures and mechanisms forusing the research facilities and benefitting from their capabilities. In the past, users mostlyrelied on EU funding, in particular via the INFRAIA Trans-National Access (TNA) tool, for financingphysical, remote, and hybrid access to European atmospheric facilities. In the future, moresustainable solutions and co-funding options are needed for widening access opportunities(including TNA as well as virtual access, VA) and guaranteeing continuous, long-term access forall national and international user groups. Therefore, the engagement of national andinternational stakeholders is required.ATMO-ACCESS WP3 approaches this issue by creating connections and then consulting keystakeholders at national and international level, with the aim to investigate potential methodsand modalities for the co-funding of access programs. Task 2 of the work package is dedicatedto establishing links to national stakeholders and funders and to explore possible pathways tointegrate them into specific programs with the RIs, which could ensure the long-termengagement of the partners in making TNA sustainable beyond the EU funding.The aim of this deliverable is to provide a summary of all efforts and results that have beenachieved over the past three years. Material collected from 14 European countries is presented,and an analysis of the current situation is given. Potential advanced access modalities arediscussed, and first examples of their implementation are shown.
Öffentliche Wahrnehmung der Primärverantwortung für Lebensmittelsicherheit: Eine Medienanalyse der Gammelfleischskandale
Creators: name: Schulze, Holger
name: Bohm, Justus
name: Kleinschmit, Daniela
name: Spiller, Achim
name: Nowak, Beate
name: Schulze, Holger
name: Bohm, Justus
name: Kleinschmit, Daniela
name: Spiller, Achim
name: Nowak, Beate
Publisher: name: Unknown
Year: 2008
Subjects: subject: Food Consumption/Nutrition/Food Safety
subject: media analysis
subject: primary responsibility for food safety
subject: quality assurance
subject: rotten meat

description: At the beginning of the year 2005 the German meat industry frequently appeared in the media with reports about rotten meat. Since then a huge number of new problems with meat have arisen which have disclosed weaknesses in food quality control and highlighted the extremely sensitive nature of the subject in the meat sector. Contrary to the BSE crisis after which private control systems were strengthened, the “rotten meat scandals” led to more state control. Hence, no clear political direction is perceptible as to whether primary responsibility for food safety should lie with the state or with the industry. The following contribution examines this question with regard to the presentation of this subject in the media. It is based on the content analysis of 347 articles on the topic “rotten meat” which were published in seven German newspapers. The empirical results demonstrate that state actors have dominated the debate in the media and have thus decisively contributed to the fact that the primary responsibility for food security in Germany is assigned to the government. Companies and organizations of the meat industry have hardly ever appeared in the discussion.
A cryogenic ice setup to simulate carbon atom reactions in interstellar ices
Creators: name: Qasim, D.
name: Witlox, M. J. A.
name: Fedoseev, G.
name: Chuang, K. -J.
name: Banu, T.
name: Krasnokutski, S. A.
name: Ioppolo, S.
name: Kastner, J.
name: van Dishoeck, E. F.
name: Linnartz, H.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The design, implementation, and performance of a customized carbon atom beam source for the purpose of investigating solid-state reaction routes in interstellar ices in molecular clouds are discussed. The source is integrated into an existing ultrahigh vacuum setup, SURFace REaction SImulation DEvice (SURFRESIDE$^{2}$), which extends this double atom (H/D, O, and N) beamline apparatus with a third atom (C) beamline to a unique system that is fully suited to explore complex organic molecule solid-state formation under representative interstellar cloud conditions. The parameter space for this system is discussed, which includes the flux of the carbon atoms hitting the ice sample, their temperature, and the potential impact of temperature on ice reactions. Much effort has been put into constraining the beam size to within the limits of the sample size with the aim to reduce carbon pollution inside the setup. How the C-atom beam performs is quantitatively studied through the example experiment, C + $^{18}$O$_2$, and supported by computationally-derived activation barriers. The potential for this source to study the solid-state formation of interstellar complex organic molecules through C-atom reactions is discussed.
description: Accepted for publication in Review of Scientific Instruments
Bridges and networks: Exact asymptotics
Creators: name: Foley, Robert D.
name: McDonald, David R.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60K25 (Primary) 60K20. (Secondary)

description: We extend the Markov additive methodology developed in [Ann. Appl. Probab. 9 (1999) 110-145, Ann. Appl. Probab. 11 (2001) 596-607] to obtain the sharp asymptotics of the steady state probability of a queueing network when one of the nodes gets large. We focus on a new phenomenon we call a bridge. The bridge cases occur when the Markovian part of the twisted Markov additive process is one null recurrent or one transient, while the jitter cases treated in [Ann. Appl. Probab. 9 (1999) 110-145, Ann. Appl. Probab. 11 (2001) 596-607] occur when the Markovian part is (one) positive recurrent. The asymptotics of the steady state is an exponential times a polynomial term in the bridge case, but is purely exponential in the jitter case. We apply this theory to a modified, stable, two node Jackson network where server two helps server one when server two is idle. We derive the sharp asymptotics of the steady state distribution of the number of customers queued at each node as the number of customers queued at the server one grows large. In so doing we get an intuitive understanding of the companion paper [Ann. Appl. Probab. 15 (2005) 519-541] which gives a large deviation analysis of this problem using the flat boundary theory in the book by Shwartz and Weiss. Unlike the (unscaled) large deviation path of a Jackson network which jitters along the boundary, the unscaled large deviation path of the modified network tries to avoid the boundary where server two helps server one (and forms a bridge).
description: Published at http://dx.doi.org/10.1214/105051604000000675 in the Annals of Applied Probability (http://www.imstat.org/aap/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Synchronized Multi-Arm Rearrangement Guided by Mode Graphs with Capacity Constraints
Creators: name: Shome, Rahul
name: Bekris, Kostas E.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Solving task planning problems involving multiple objects and multiple robotic arms poses scalability challenges. Such problems involve not only coordinating multiple high-DoF arms, but also searching through possible sequences of actions including object placements, and handoffs. The current work identifies a useful connection between multi-arm rearrangement and recent results in multi-body path planning on graphs with vertex capacity constraints. Solving a synchronized multi-arm rearrangement at a high-level involves reasoning over a modal graph, where nodes correspond to stable object placements and object transfer states by the arms. Edges of this graph correspond to pick, placement and handoff operations. The objects can be viewed as pebbles moving over this graph, which has capacity constraints. For instance, each arm can carry a single object but placement locations can accumulate many objects. Efficient integer linear programming-based solvers have been proposed for the corresponding pebble problem. The current work proposes a heuristic to guide the task planning process for synchronized multi-arm rearrangement. Results indicate good scalability to multiple arms and objects, and an algorithm that can find high-quality solutions fast and exhibiting desirable anytime behavior.
A new cladistic insight on comparative anatomy and phylogeny of rudists (Bivalvia, Hippuritida)
Creators: name: Rineau, Valentin
name: Masse, Jean-Pierre
name: Villier, Loïc
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified

description: The phylogenetic history of rudist bivalves is reviewed using a cladistic analysis based on 41 morphological shell characters and a new topology is proposed. A novel approach to rudist comparative anatomy has enabled the mapping of homologous zones. We highlight that ‘pallial canals’ can be homologous to four specific cavities that have merged during rudist evolution. The characters of the myophores and muscle insertions have also been reappraised using a hierarchical scheme. We formalize, for the first time, the complex diversification of rudist myophores by constructing tree-like characters that can contain up to six informative states for each of the four myophores. All characters have been coded as independent features. This has enabled the identification of different evolutionary rates of change between left and right valves and allows the recognition of the various morphoanatomic responses of one valve to the structural changes of the other. All characters have been coded in hierarchies and analysed in three-taxon analysis. Taxonomic sampling composed of two species per family allows an exhaustive monophyly test of all families of the suborder Hippuritidina. Only the families Polyconitidae, Plagioptychidae, Radiolitidae and Hippuritidae are found to be monophyletic. The two superfamilies are both found to be polyphyletic. The Hippuritidae is found to be the sister group of the Radiolitidae. Pachytraga is found as the sister group of all the rudists with pallial canals except Sellaea. Two evolutionary radiations in rudists are dated, using the cladistic concept of temporal hierarchy, to the Hauterivian + and the Albian+.
ATMO-ACCESS D2.1 Report on the current user needs as related to the historically offered access ways
Creators: name: Saponaro, Giulia
Publisher: name: FMI
Year: 2021

description: The ATMO-ACCESS project is the organized response of distributed atmospheric research facilities for developing a pilot for a new model of Integrating Activities. ATMO-ACCESS will deliver a series of recommendations for establishing a comprehensive and sustainable framework for access to distributed atmospheric Research Infrastructures (RI), ensuring integrated access to and optimised use of the services provided.This document is the first milestone sustaining the project’s first strategic pillar (SP1) focused on harmonizing access procedures for users and stakeholders. SP1 addresses the specific challenge of elaborating references and guidelines for access to be adopted by atmospheric RIs, based on an extended analysis of solutions used by different infrastructures also outside the environmental domain. All work in ATMO-ACCESS integrates experiences from past access programs, thus, streamlining the work and avoiding duplication of efforts. This document, delivered right at the beginning of the project activities, enables the assessment of the user expectations merging from the access types offered in the past though the INFRAIA projects (Table 1). Limited TNA opportunities are currently offered in the frame of the ACTRIS IMP project. However, at the time of this survey, the 1st TNA call was still ongoing and very few projects were completed.This document analyses the results of the survey addressed to the users of former INFRAIA projects. This work considers previous activities, such as the ACTRIS User experience map1 developed within the ACTRIS IMP project to define the components of an improved TNA user experience and map the different phases with their related pain points and opportunities. The goal of the survey launched within this Milestone is the assessment of both the expectations of the users as related to the access types that were offered in the past as well as the level of user awareness of the actual range of the offered access within the ATMO-ACCESS project. User feedback questionnaires were not distributed after access completion in most of the past projects. This was first introduced in the ENVRI-plus TNA pilot2 to collect feedback on the access experience and investigate the user needs for interdisciplinary research.This report represents the first step towards building a qualitative and quantitative monitoring system based on user feedbacks.
Vessel-level productivity in Commonwealth fisheries
Creators: name: Perks, Christopher
name: McGill, Kristin
name: Curtotti, Robert
name: Perks, Christopher
name: McGill, Kristin
name: Curtotti, Robert
Publisher: name: Unknown
Year: 2011
Subjects: Agribusiness
Resource /Energy Economics and Policy

description: The total factor productivity of the Commonwealth Trawl Sector of the Southern and Eastern Scalefish and Shark Fishery is estimated for the period 1996–97 to 2008–09 using vessel-level data and a traditional approach that captures the production decisions of fishers. The paper develops a replicable methodology and calculates benchmark productivity estimates by which future estimates for other Commonwealth fisheries can be evaluated. Productivity estimates presented in this paper are based on vessel-level financial and catch data collected by ABARES in its annual survey of the fishery and the application of the Fisher index method. The analysis of trends in productivity offers important new information to decision-makers. Changes in the way in which fishers organise the transformation of inputs into outputs have a direct impact on firm-level economic performance. Changes in productivity at the vessel level illustrate the response of the fleet to policy settings in the fishery and, more broadly, to environmental factors. This is of particular value for fishery managers when they consider policy instruments—such as fish stocks, technology and fleet structure—that might affect the drivers of productivity growth in fisheries.
Optical Linear Polarization of Late M- and L-Type Dwarfs
Creators: name: Osorio, M. R. Zapatero
name: Caballero, J. A.
name: Bejar, V. J. S.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: (Abridged). We report on the linear polarimetric observations in the Johnson I filter of 44 M6-L7.5 ultracool dwarfs (2800-1400 K). Eleven (10 L and 1 M) dwarfs appear to have significant linear polarization (P = 0.2-2.5%). We have compared the M- and L-dwarf populations finding evidence for a larger frequency of high I-band polarization in the coolest objects, supporting the presence of significant amounts of dust in L-dwarfs. The probable polarizing mechanism is related to the presence of heterogeneous dust clouds nonuniformly distributed across the visible photospheres and the asymmetric shape of the objects. In some young ultracool dwarfs, surrounding dusty disks may also yield polarization. For polarimetric detections, a trend for slightly larger polarization from L0 to L6.5 may be present in our data, suggesting changes in the distribution of the grain properties, vertical height of the clouds, metallicity, age, and rotation speed. One of our targets is the peculiar brown dwarf (BD) 2MASS J2244+20 (L6.5), which shows the largest I-band polarization degree. Its origin may lie in a surrounding dusty disk or rather large photospheric dust grains. The M7 young BD CFHT-BD-Tau 4 and the L3.5 field dwarf 2MASS J0036+18 were also observed in the Johnson R filter. Our data support the presence of a circum(sub)stellar disk around the young accreting BD. Our data also support a grain growth in the submicron regime in the visible photosphere of J0036+18 (1900 K). The polarimetric data do not obviously correlate with activity or projected rotational velocity. Three polarized early- to mid-L dwarfs display I-band light curves with amplitudes below 10 mmag.
description: Accepted for publication in ApJ (March 2005), 35 pages, 5 figures
Nonlinear optics in high refractive index contrast photonic crystal microcavities
Creators: name: Cowan, Allan Ralph
Publisher: name: University of British Columbia
Year: 2009

description: This thesis describes theoretical and experimental research on the nonlinear response of high refractive index contrast (HRIC) optical microcavities. An intuitive, numerically efficient model of second harmonic reflection from two dimensional (2D), planar photonic crystals made of sub-wavelength thick, non-centrosymmetric semiconductors is developed. It predicts that appropriate 2D texture can result in orders of magnitude enhancement of the reflected second order signal when harmonic plane waves are used to excite leaky photonic crystal eigenmodes. Local field enhancement in the textured slab, and other physical processes responsible for these enhancements are explained. A different formalism is developed to treat the Kerr-related bistable response of a 3D microcavity coupled to a single mode waveguide. This model predicts that optical bistability should be observed using only milliwatts of power to excite a cavity fabricated in Al₀.₁₈Ga₀.₈₂ As, having a quality factor of Q = 4000 and a mode volume of 0.05 /μm³. Two-photon absorption is shown to only slightly hinder the performance in Al₀.₁₈Ga₀.₈₂As. By including nonresonant downstream reflections in the model, novel hysteresis loops are predicted, and their stability is analyzed. A coupled waveguide-microcavity structure is fabricated by selectively cladding a silicon ridge-Bragg grating waveguide with photoresist. Threedimensionally localized optical modes are realized with Q values ranging from 200 to 1200, at ~ 1.5 μm. Using 100 fs pulses, the transmission spectra of these structures is studied as a function of input power. The output power saturates when the cavity mode and pulse centre frequencies are resonant, and the output exhibits super linear growth when they are appropriately detuned. These results are explained in terms of the filtering action of the microcavity on the nonlinear spectral distortion of the input pulse as it propagates through the waveguide. PbSe nanocrystals are deposited on a microcavity in order to enhance its nonlinear response. Asymmetrical spectral broadening and saturation of the transmitted power is observed with ~ 10 000 photons in the cavity. A time-dependent third order model of the microcavity's impulse response is developed to describe this behaviour. This work contributes to a quantitative understanding of how HRIC dielectric texture can be engineered to obtain useful nonlinear optical responses at moderate power levels.
Solitons in a box-shaped wavefield with noise: perturbation theory and statistics
Creators: name: Mullyadzhanov, Rustam
name: Gelash, Andrey
Publisher: name: arXiv
Year: 2020
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We investigate the fundamental problem of the nonlinear wavefield scattering data corrections in response to a perturbation of initial condition using inverse scattering transform theory. We present a complete theoretical linear perturbation framework to evaluate first-order corrections of the full set of the scattering data within the integrable one-dimensional focusing nonlinear Schrödinger (NLSE) equation. The general scattering data portrait reveals nonlinear coherent structures - solitons - playing the key role in the wavefield evolution. Applying the developed theory to a classic box-shaped wavefield we solve the derived equations analytically for a single Fourier mode acting as a perturbation to the initial condition, thus, leading to the sensitivity closed-form expressions for basic soliton characteristics, i.e. the amplitude, velocity, phase and its position. With the appropriate statistical averaging we model the soliton noise-induced effects resulting in compact relations for standard deviations of soliton parameters. Relying on a concept of a virtual soliton eigenvalue we derive the probability of a soliton emergence or the opposite due to noise and illustrate these theoretical predictions with direct numerical simulations of the NLSE evolution. The presented framework can be generalised to other integrable systems and wavefield patterns.
description: 6 pages, 3 figures
Exotic and nonexotic magnetic transitions in the context of the SELEX and GRAAL experiments
Creators: name: Kim, Hyun-Chul
name: Polyakov, Maxim
name: Praszalowicz, Michal
name: Yang, Ghil-Seok
name: Goeke, Klaus
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We calculate magnetic transition moments in the chiral quark-soliton model, with explicit SU(3)-symmetry breaking taken into account. The dynamical model parameters are fixed by experimental data for the magnetic moments of the baryon octet and from the recent measurements of $Θ^{+}$ mass. Known magnetic transition moments $μ_{ΛΣ}$, $μ_{NΔ}$ are reproduced and predictions for other octet-decuplet and octet-antidecuplet transitions are given. In particular $μ_{ΣΣ^{\ast}}$ recently constrained by SELEX is shown to be below $0.82 μ_N$. The recent GRAAL data on $η$ photoproduction off the nucleon are explained in terms of a new narrow antidecuplet neutron-like resonance.
description: 14 pages, 9 figures. Final version accepted for publication in Phys.Rev.D
Optimum Level and Welfare Effects of Export Taxes for Cocoa Beans in Indonesia: A Partial Equilibrium Approach
Creators: name: Permani, Risti
name: Vanzetti, David
name: Setyoko, Nur Rakhman
name: Permani, Risti
name: Vanzetti, David
name: Setyoko, Nur Rakhman
Publisher: name: Unknown
Year: 2011
Subjects: subject: International Relations/Trade
subject: cocoa
subject: Indonesia
subject: export taxes
subject: partial equilibrium analysis
subject: welfare effects
subject: vector error correcting method.

description: Aiming to support downstream processing, the Indonesian government announced an export tax in May 2010. Using a partial equilibrium approach, this paper therefore attempts to analyse: (i) whether the Indonesian government has imposed optimal taxes on cocoa beans; (ii) the impacts of cocoa export taxes on domestic welfare. In particular, it attempts to develop a two-stage partial equilibrium welfare analysis in which effects of policy for upstream sectors may affect downstream sectors. The study also presents thorough econometric estimates of import demand, export supply, Armington and cross elasticities using the Vector Error Correction Model (VECM) to deal with cointegration and simultaneity issues. A literature search suggests that existing studies not only report mixed results but also use methods, mostly the Ordinary Least Squares (OLS) model, which could not deal with cointegration and simultaneity issues. Three key lessons can be drawn for this study. First, an export tax on Indonesian exports of cocoa beans would indeed divert some of the crop to domestic use. However, this leads to significant losses to cocoa bean producers and does little to develop a processing sector. Second, interdependence between major cocoa exporting countries’ policy is evident. Third, due to limited readily available data, better econometric techniques do not necessarily lead to improved robustness of estimates of elasticities. This could significantly affect estimates of optimal export taxes and, therefore, analysis of welfare effects.
Spatial-Angular Attention Network for Light Field Reconstruction
Creators: name: Wu, Gaochang
name: Wang, Yingqian
name: Liu, Yebin
name: Fang, Lu
name: Chai, Tianyou
Publisher: name: arXiv
Year: 2020
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Typical learning-based light field reconstruction methods demand in constructing a large receptive field by deepening the network to capture correspondences between input views. In this paper, we propose a spatial-angular attention network to perceive correspondences in the light field non-locally, and reconstruction high angular resolution light field in an end-to-end manner. Motivated by the non-local attention mechanism, a spatial-angular attention module specifically for the high-dimensional light field data is introduced to compute the responses from all the positions in the epipolar plane for each pixel in the light field, and generate an attention map that captures correspondences along the angular dimension. We then propose a multi-scale reconstruction structure to efficiently implement the non-local attention in the low spatial scale, while also preserving the high frequency components in the high spatial scales. Extensive experiments demonstrate the superior performance of the proposed spatial-angular attention network for reconstructing sparsely-sampled light fields with non-Lambertian effects.
description: 15 pages, 13 figures and 5 tables, Accepted by IEEE Transactions on Image Processing (IEEE TIP)
Analysis of Flue-cured Tobacco Supply Elasticity in Zimbabwe 1980-2010: An Error Correction Model Approach
Creators: name: Pfumayaramba, Tichaona
name: Pfumayaramba, Tichaona
Publisher: name: Unknown
Year: 2011
Subjects: subject: Research Methods/ Statistical Methods
subject: Supply elasticity
subject: stationary data
subject: cointegration
subject: error correction model.

description: Flue cured tobacco has been an important crop for the Zimbabwean economy historically in terms of foreign currency earnings and employment creation. Between 1980 and 2000, there is a general increase in tobacco output, followed by a sharp decline from 2001 up to 2008 and then output starts to increase again. Flue cured tobacco output as measured by the quantity that is delivered to the auction floors is used to estimate supply elasticity. The objective is to determine if flue-cured tobacco supply is price elastic and whether price incentives alone will boost supply in the short -run. Time series data on flue cured tobacco output, prices, production costs, prices of major competing crops, the exchange rates and inflation are analysed to model the price elasticity of flue cured tobacco between 1980 and 2010. The Augmented Dickey –Fuller unit root test is performed to test the variables for stationarity. The data generating processes show these data series to be non-stationary and therefore OLS estimations would be biased. The data series are differenced and the Engel-Granger procedure is performed to test for cointegration. The Error Correction Model approach is used to estimate flue cured tobacco supply. Flue cured tobacco supply is found to be price inelastic in the short –run.
Thematic Network on Decolonization of Arctic Library and Archives Metadata (DALAM) Success Story
Creators: Campbell, Sandy
Lund, Peter
McAllister, Shannon
Publisher: name: University of Alberta Library
Year: 2025

The impact of colonization is immense, influencing everything from national governance to justice systems to the subject headings in our library catalogues.  Decolonization efforts, broadly, are activities that are designed to ameliorate the negative impacts of colonization. DALAM, the University of the Arctic Thematic Network on the Decolonization of Arctic Library and Archives Metadata, is a network that focuses on library subject headings and classification systems, archival descriptions, and other metadata that are incorrect, culturally inappropriate, derogatory or otherwise unacceptable within polar libraries and archives.
Switching of band inversion and topological surface states by charge density wave
Creators: name: Mitsuishi, N.
name: Sugita, Y.
name: Bahramy, M. S.
name: Kamitani, M.
name: Sonobe, T.
name: Sakano, M.
name: Shimojima, T.
name: Takahashi, H.
name: Sakai, H.
name: Horiba, K.
name: Kumigashira, H.
name: Taguchi, K.
name: Miyamoto, K.
name: Okuda, T.
name: Ishiwata, S.
name: Motome, Y.
name: Ishizaka, K.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Topologically nontrivial materials host protected edge states associated with the bulk band inversion through the bulk-edge correspondence. Manipulating such edge states is highly desired for developing new functions and devices practically using their dissipation-less nature and spin-momentum locking. Here we introduce a transition-metal dichalcogenide VTe$_2$, that hosts a charge density wave (CDW) coupled with the band inversion involving V3$d$ and Te5$p$ orbitals. Spin- and angle-resolved photoemission spectroscopy with first-principles calculations reveal the huge anisotropic modification of the bulk electronic structure by the CDW formation, accompanying the selective disappearance of Dirac-type spin-polarized topological surface states that exist in the normal state. Thorough three dimensional investigation of bulk states indicates that the corresponding band inversion at the Brillouin zone boundary dissolves upon CDW formation, by transforming into anomalous flat bands. Our finding provides a new insight to the topological manipulation of matters by utilizing CDWs' flexible characters to external stimuli.
description: 46 pages, 6 main figures, 12 supplementary figures
ATMO-ACCESS D4.1 Report on existing training schemes in the atmospheric domain related to physical access
Creators: name: Reimann, Stefan
name: Herrmann, Hartmut
name: Alados-Arboledas, Lucas
Publisher: name: EMPA
Year: 2022

description: Transnational access (TNA) has been used within several European atmospheric research projects (e.g. ACTRIS, EUROCHAMP) to facilitate measurement campaigns, to foster knowledge exchange and to support the education of early career scientists on the European scale. In fact, many international measurement campaigns would not have taken place without this instrument for transnational support in place. The training component has always been a critical focus of the TNA provision, especially for young scientists. In the past, TNA was very much related to physical access, where, for example, several instruments from different institutes were installed at a specific location and scientists related to the respective instruments have supported the data production. Furthermore, also physical access to training schools has been a popular subject of past TNAs.When the ATMO-ACCESS project and its training component in WP4 were devised, the reduction of the environmental footstep related to these trainings, mostly performed by physical access, was a very strong driver to develop further TNAs in a more sustainable way. However, during the recent Covid-19 pandemic new remote access tools (such as Zoom, Webex and MS Teams) became so popular within the research community, that also other issues such as spending less time travelling and the combination of research and family life became an issue. This has been the incentive for producing two reports on TNA for training activities: First, TNA and training related to physical access and second, TNA and training related to remote access.Within this report, the existing training schemes in the atmospheric domain related to physical access will be discussed. This report on physical access is accompanied by a report on remote access. Both reports have mostly the same structure and at the end an identical conclusion section. The basis of both reports is a questionnaire, which was used to gather information on past physical and remote access training. This was sent to the entities of ACTRIS/EUROCHAMP, ICOS and IAGOS, which have offered TNA related to training in the past. Furthermore, these entities were asked about their future plans, related to physical and remote training within TNA, which are also summarized in the reports.The outcome of this report, together with the report on remote access, will be used to devise specific calls to test new ways of training within the TNAs. This will then build the basis for future trainings related to TNAs within the atmospheric research community and potentially for TNAs in projects within other environmental compartments.
Ground Motion Evaluation & Geotechnical Evaluation
Creators: name: UCLA Capital Programs
Publisher: name: figshare
Year: 2020
Subjects: subject: 90503 Construction Materials
subject: FOS: Civil engineering
subject: 90502 Construction Engineering
subject: 120201 Building Construction Management and Project Planning

description: This report presents the results of GeoPentech's review of existing information, ground motion evaluation, and geotechnical evaluation for Botany Building Master Plan Study ("project") on the UCLA campus in the City of Los Angeles, California.
An Analytic Model for an Evolving Protoplanetary Disk with a Disk Wind
Creators: name: Chambers, John
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We describe an analytic model for an evolving protoplanetary disk driven by viscosity and a disk wind. The disk is heated by stellar irradiation and energy generated by viscosity. The evolution is controlled by 3 parameters: (i) the inflow velocity towards the central star at a reference distance and temperature, (ii) the fraction of this inflow caused by the disk wind, and (iii) the mass loss rate via the wind relative to the inward flux in the disk. The model gives the disk midplane temperature and surface density as a function of time and distance from the star. It is intended to provide an efficient way to calculate conditions in a protoplanetary disk for use in simulations of planet formation. In the model, disks dominated by viscosity spread radially while losing mass onto the star. Radial spreading is the main factor reducing the surface density in the inner disk. The disk mass remains substantial at late times. Temperatures in the inner region are high at early times due to strong viscous heating. Disks dominated by a wind undergo much less radial spreading and weaker viscous heating. These disks have a much lower mass at late times than purely viscous disks. When mass loss via a wind is significant, the surface density gradient in the inner disk becomes shallower, and the slope can become positive in extreme cases.
description: Published in the Astrophysical Journal
Optimising the spatial pattern of landscape revegetation
Creators: name: Polyakov, Maksym
name: Pannell, David J.
name: Rowles, Alexei
name: Park, Geoff
name: Roberts, Anna M.
name: Polyakov, Maksym
name: Pannell, David J.
name: Rowles, Alexei
name: Park, Geoff
name: Roberts, Anna M.
Publisher: name: Unknown
Year: 2011
Subjects: subject: Environmental Economics and Policy
subject: Land Economics/Use
subject: landscape reconstruction
subject: biodiversity
subject: optimisation
subject: habitat

description: The spatial pattern of landscape reconstruction makes a substantial difference to environmental outcomes. We develop a spatially explicit bio-economic model that optimises the reconstruction of a heavily cleared landscape through revegetation. The model determines the spatial priorities for revegetation that minimises economic costs subject to achieving particular improvements in habitat for 29 woodland-dependent bird species. The study focuses on the Avoca catchment (330 thousand ha) in North-Central Victoria. Our model incorporates spatial pattern and heterogeneity of existing and reconstructed vegetation types. The revegetation priorities are identified as being: sites in the vicinity of existing remnants, riparian areas, and parts of the landscape with diverse land uses and vegetation types. Optimal reconstruction design is affected by opportunity costs due to the loss of agricultural production and the costs of revegetation. 1 Centre for Environmental Economics and Policy, School of Agricultural and Resource Economics, University of Western Australia, Crawley, WA, 6009 2 Department of Primary Industries, Rutherglen, RMB 1145 Chiltern Valley Rd, Rutherglen, Victoria, 3685 3 North Central Catchment Management Authority, PO Box 18, Huntly, Victoria, 3551
Multidimensional RFI Framework for Characterising Radio Astronomy Observatories
Creators: name: Sihlangu, Isaac
name: Oozeer, Nadeem
name: Bassett, Bruce A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Radio Frequency Interference (RFI) has historically plagued radio astronomy, worsening with the rapid spread of electronics and increasing telescope sensitivity. We present a multi-dimensional probabilistic framework for characterising the RFI environment around a radio astronomy site that uses automatically flagged data from the array itself. We illustrate the framework using about 1500 hours of commissioning data from the MeerKAT radio telescope; producing a 6-dimensional array that yields both average RFI occupancy as well as confidence intervals around the mean as a function of key variables (frequency, direction, baseline, time). Our results provide the first detailed view of the MeerKAT RFI environment at high sensitivity as a function of direction, frequency, time of day and baseline. They allow us to track the historical evolution of the RFI and to quantify fluctuations which can be used for alerting on new RFI. As expected we find the major RFI contributors for MeerKAT site are from Global Positioning System (GPS) satellites, flight Distance Measurement Equipment (DME) and the Global System for Mobile (GSM) Communications. Beyond characterising RFI environments our approach allows observers access to the prior probability of RFI in any combination of tracked variables, allowing for more efficient observation planning and data excision.
Geotechnical Investigation: Proposed Classroom Building Botanical Garden University of California, Los Angeles, Los Angeles, California
Creators: name: GeoCon West. Inc. GeoCon West, Inc.
Publisher: name: figshare
Year: 2020
Subjects: subject: 90502 Construction Engineering
subject: FOS: Civil engineering
subject: 90503 Construction Materials
subject: 120201 Building Construction Management and Project Planning

description: Report presents the results of a geotechnical investigation for the proposed single-story classroom building to be located at the southeast corner of UCLA in the City of Los Angeles, California.
Quantum correlations in the soliton collisions
Creators: name: Lee, Ray-Kuang
name: Lai, Yinchieh
name: Kivshar, Yuri S.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study quantum correlations and quantum noise in the soliton collision described by a general two-soliton solution of the nonlinear Schrödinger equation, by using the back-propagation method. Our results include the standard case of a $sech$-shaped initial pulse analyzed earlier. We reveal that double-hump initial pulses can get more squeezed, and the squeezing ratio enhancement is due to the long collision period in which the pulses are more stationary. These results offer promising possibilities of using higher-order solitons to generate strongly squeezed states for the quantum information process and quantum computation.
description: 4 pages, 3 figures
A whole farm comparison of irrigated cotton rotations in the Lower Namoi Valley, NSW
Creators: name: Powell, Janine
name: Scott, J. Fiona
name: Powell, Janine
name: Scott, J. Fiona
Publisher: name: Unknown
Year: 2011
Subjects: Financial Economics
Research Methods/ Statistical Methods

description: A whole farm budget for a representative farm in the Lower Namoi Valley in northern NSW was used to analyse the financial implications of a comparative rotational experiment of four cotton-based rotations conducted in recent years at the Australian Cotton Research Institute, near Narrabri. The model was used to compare the rotations, which highlighted the importance of crop selection for the financial performance of the business. Apart from providing a broad brush picture of financial performance, the model also had a stochastic component which was used to analyse the effect of variable commodity prices on the whole farm profitability of each rotation. Mean results indicated a positive return for all rotations within the representative farm budgets for the Lower Namoi Valley, indicating that given restricted irrigation water availability and average commodity prices, each rotation would ensure that the business returned a profit. The rotations varied in resilience to commodity price variability from 74% to 99.5% probability to return a positive farm operating surplus.
DETERMINANTS OF TRUST IN THE INDONESIAN POTATO INDUSTRY: A COMPARISON AMONG GROUPS OF POTATO FARMERS
Creators: name: Puspitawati, Eka
name: Puspitawati, Eka
Publisher: name: Unknown
Year: 2011
Subjects: subject: Crop Production/Industries
subject: buyer-seller relationships
subject: trust
subject: potato industry

description: Indonesia’s potato industry is undergoing a rapid transformation, presenting producers with new and profitable opportunities to participate in sales to the modern channels. However, few farmers are involved in the new channels. This study offers an analysis of three groups of potato farmers’ perceptions of trust in their buyers. The aim is to understand the many different ways producers can enter modern chains and how different channels suit the individual characteristics of different producers. We surveyed 50 farmer field schools (FFS) producers, 60 Indofood suppliers, and 192 general potato farmers (GPF) in the largest potato producing area in Indonesia, West Java. Using MANOVA and linear regression methods, the study reveals that flexibility and dependence are determinate factors of trust in the three groups. Particularly among the FFS producers, relative price and firm size are factors identified to increase the farmers’ trust. Farmers contracting with Indofood establish the relationship with the firm in terms of reputation and flexibility. On the other hand, the GPF has more concerns about buyers offering price transparency and joint problem solving. This article provides a conceptual model and an empirical analysis of the buyer-seller relationship in the potato industry in Indonesia.
Will There be Any Starting Vortices in Current Density Field around an Airfoil-shaped Cavity in a Superconductor?
Creators: name: Jiayuan, Zhang
Publisher: name: Zenodo
Year: 2019
Subjects: supercurrent; airfoil; singularity; critical current density; starting vortex

description: Supercurrent and superfluid have a similarity of being regarded as some kind of non-viscous fluid flow. In potential flow theory, if velocity is given to an airfoil suddenly, the fluid velocity at the singularity of the trailing edge will be infinite, the flow field still being irrotational everywhere. However, in the real non-viscous fluid, superfluid, a starting vortex will be generated when the critical velocity is reached near the singularity, so that an equal and opposite velocity circulation will be generated around the airfoil. Now consider a superconductor as shown in the figure, in which there is an airfoil-shaped cavity. If a suitable current is suddenly given into the superconductor, even if the current density at the entrance is much less than the critical value, the critical current may be reached near the trailing edge due to the singularity. Then, curl may be generated in the current density field, which means current vortex similar to the starting vortex may appear as well as electromagnetic wave. As for the experiment, current density field can be obtained by measuring the magnetic field at several points near the superconductor.