cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Perceptions of Diversity Among Current and Former Students and Faculty in Three Graduate Programs
Creators: name: Ackermann, Margot E.
Publisher: name: Old Dominion University
publisherIdentifier: https://ror.org/04zjtrb98
publisherIdentifierScheme: ROR
Year: 2004

description: This study compared the perceptions of diversity among current graduate students, former graduate students, and current faculty in three graduate programs. Sense of belonging, universality, openness to experience, diversity experiences, and perceptions of diversity were examined. Participants included 64 current students, 30 former students, and 15 faculty members in Old Dominion University's M.S. and Ph.D. programs in psychology and the Virginia Consortium Program's Psy.D. program. Solicited by either email or postal mail, participants completed an online survey that assessed demographic details and the variables of interest. After addressing data issues, Pearson's r examined the relationships among the dependent variables. ANOVAs assessed whether there were group differences, as well as differences by program (M.S., Ph.D., and Psy.D.). on perceptions of diversity, diversity experiences, and universality. A MANOVA was used to examine group and program differences in sense of belonging. Standard multiple regression assessed whether, for current students, universality was predicted by openness and sense of belonging; whether, for all participants, perceptions of diversity were predicted by diversity experiences, openness to experience, and universality; and for current and former students, whether perceptions of diversity were predicted by diversity experiences, openness to experience, universality, and sense of belonging. Overall, the hypothesis that the dependent variables of interest would be correlated for all participants was mainly supported. Interestingly, few differences were found for the different groups, although former students tended to recall more positive perceptions of diversity and a greater sense of belonging than current students. Some of the lack of differences may be attributable to sample sizes issues. From the planned multiple regressions, it was found that openness was a significant predictor of universality and that sense of belonging significantly contributed to perceptions of diversity. Two post hoc multiple regressions revealed that for current and former students, faculty support was a significant predictor of perceptions of diversity and that for current students, social desirability was also a significant predictor. A major limitation of this research was that little demographic information was solicited from participants. Future research should examine outcomes of specific efforts to improve perceptions of diversity and sense of belonging.
A characterization of the $n$-ary many-sorted closure operators and a many-sorted Tarski irredundant basis theorem
Creators: name: Vidal, Juan Climent
name: Llópez, Enric Cosme
Publisher: name: arXiv
Year: 2017
Subjects: subject: Logic (math.LO)
subject: FOS: Mathematics

description: A theorem of single-sorted algebra states that, for a closure space $(A,J)$ and a natural number $n$, the closure operator $J$ on the set $A$ is $n$-ary if, and only if, there exists a single-sorted signature $Σ$ and a $Σ$-algebra $\mathbf{A}$ such that every operation of $\mathbf{A}$ is of an arity $\leq n$ and $J = \mathrm{Sg}_{\mathbf{A}}$, where $\mathrm{Sg}_{\mathbf{A}}$ is the subalgebra generating operator on $A$ determined by $\mathbf{A}$. On the other hand, a theorem of Tarski asserts that if $J$ is an $n$-ary closure operator on a set $A$ with $n\geq 2$, and if $i
Inflation and wage indexation in Italy
Creators: name: FAZIO, A.
Publisher: name: PSL Quarterly Review
Year: 2013
Subjects: subject: Italy, inflation, post-World War II, labour costs, wages, productivity, imports
subject: E31, N14

description: The present paper traces the development in inflation in Italy throughout the period following WWII, with particular emphasis on its relation to labour costs, productivity and import prices. Since the sliding scale mechanism has been operating at full power during the whole of the seventies, and especially in the second half of the decade, owning to the increased frequency of both domestic and imported destabilising pressures, this period is analysed in greater detail. The conclusions indicate that the sliding scale has played an important role in aggravating inflationary pressures during that period. JEL: E31, N14
description: PSL Quarterly Review, V. 34, N. 137 (1981)
Les systèmes de culture sous abri à la Martinique
Production systems under cover in Martinique
Creators: name: Langlais, C.
name: Joachim, R.
name: Langlais, C.
name: Joachim, R.
Publisher: name: Unknown
Year: 1993
Subjects: Crop Production/Industries
Farm Management

description: La production maraîchère à la Martinique est limitée par les pluies fréquentes et importantes. Pour pallier cette contrainte, des systèmes de culture sous abri ont été mis au point par le CIRAD et se sont développés chez les agriculteurs : en 1993, environ 12 ha d'abris sont installés. Il existe deux types de systèmes de culture principaux sous abri : la culture sans sol et la culture en pleine terre, représentant respectivement 7 et 5 hectares d'abris. Ces deux types de systèmes de culture répondent à des objectifs différents : - la culture sans sol nécessite une technicité et des investissements importants et les risques sont élevés. C'est dans cette catégorie que l'on retrouve l'essentiel des gros producteurs pour qui la culture sous abri est l'activité principale. - la culture sous abri en pleine terre s'est développée plus récemment et est souvent une activité de complément à la culture maraîchère en plein champ. Les risques sont tamponnés par l'utilisation du sol, mais des contraintes liées à la fertilité du sol (adventices, nématodes, champignons et bactéries) peuvent limiter les possibilités d'intensification. Les principales spéculations sous abris sont la laitue (3.5 ha), les fleurs (2.5 ha) et la tomate ( 1.2 ha). Cette communication présente un mode d'intensification de la production agricole en plein développement à la Martinique : la culture sous abri. Elle s'appuie sur des résultats de recherche du CIRAD et sur une enquête réalisée conjointement par le CIRAD et la Chambre d' Agriculture auprès des producteurs en avril et mai 1993.
A model for leptogenesis at the TeV scale
Creators: name: Abada, Asmaa
name: Aissaoui, Habib
name: Losada, Marta
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider the mechanism of thermal leptogenesis at the TeV scale in the context of an extension of the Standard Model with 4 generations and the inclusion of four right-handed Majorana neutrinos. We obtain a value for the baryon asymmetry of the Universe in accordance with observations by solving the full set of coupled Boltzmann equations for this model.
description: 14 pages, 2 eps figures to appear in Nuclear Physics B
Boolean functions on high-dimensional expanders
Creators: name: Dikstein, Yotam
name: Dinur, Irit
name: Filmus, Yuval
name: Harsha, Prahladh
Publisher: name: arXiv
Year: 2018
Subjects: subject: Computational Complexity (cs.CC)
subject: Combinatorics (math.CO)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: We initiate the study of Boolean function analysis on high-dimensional expanders. We give a random-walk based definition of high-dimensional expansion, which coincides with the earlier definition in terms of two-sided link expanders. Using this definition, we describe an analog of the Fourier expansion and the Fourier levels of the Boolean hypercube for simplicial complexes. Our analog is a decomposition into approximate eigenspaces of random walks associated with the simplicial complexes. Our random-walk definition and the decomposition have the additional advantage that they extend to the more general setting of posets, encompassing both high-dimensional expanders and the Grassmann poset, which appears in recent work on the unique games conjecture.
 We then use this decomposition to extend the Friedgut-Kalai-Naor theorem to high-dimensional expanders. Our results demonstrate that a constant-degree high-dimensional expander can sometimes serve as a sparse model for the Boolean slice or hypercube, and quite possibly additional results from Boolean function analysis can be carried over to this sparse model. Therefore, this model can be viewed as a derandomization of the Boolean slice, containing only $|X(k-1)|=O(n)$ points in contrast to $\binom{n}{k}$ points in the $(k)$-slice (which consists of all $n$-bit strings with exactly $k$ ones).
description: 48 pages, Extended version of the prior submission, with more details of expanding posets (eposets)
A field and simulation study of the initiation phase in Douglas-fir plantations
Creators: name: Boldor, Marius Ioan
Publisher: name: University of British Columbia
Year: 2011

description: The stand initiation phase of stand dynamics has important implications for subsequent stand development, yet it is generally not addressed in growth and yield models. Planted trees may or may not grow as expected if there is significant recruitment of natural regeneration and/or herb and shrub competition and if the interactions between the planted trees and other vegetation is not managed. Two experiments initiated at Malcolm Knapp Research Forest (MKRF) in the early 1980's were re-measured to produce extended data sets that describe stand development in the face of invasion by non-crop trees and the competitive effects of shrubs. These data sets were then used to test the predictive ability of the ecosystem management model FORECAST (a stand level hybrid simulation model) to represent early stand development. The Blaney Lake experiment was established to examine the vegetation development in a chronosequence of young Douglas-fir plantations on four adjacent small clearcuts that incorporated a local topographic sequence of soil moisture regimes - xeric, mesic and hygric. The data showed that there is a relatively short temporal window (up to 10 years) for non-crop tree recruitment, that this varies from year to year, and that the outcomes pose a difficulty for predicting future stand development. The data also suggest that unmanaged recruitment may invalidate early stand development predictions of models that ignore non-crop recruitment and interactions with planted trees. FORECAST was capable to capture the effects of these complex interactions. The Vegetation Competition experiment was initiated to study the effect of different levels of non-crop vegetation on growth of two conifer species and the results were compared with output from FORECAST to assess its ability to represent the competitive interactions. Again, for most of the variables FORECAST made predictions that mimicked the field data. The results presented here provide evidence of the utility of the ecosystem model FORECAST in projecting the development and growth of young conifer plantations in the CWHdm biogeoclimatical subzone. This study increases confidence in the FORECAST model for application in young stands. However, it must be emphasized again that the accuracy of model performances will reflect the availability of appropriate calibration data sets.
title: Visual preferences in an ageing population : design, theory, practice, education & critical reflection
Creators: name: Wright, Elizabeth Ann
Publisher: name: The Open University
Year: 2013

description: Formative periods represent early phases in life when we are particularly sensitive to experiences that influence later choices. This investigation hypothesised that the design of products associated with formative periods continues to influence preference throughout life. In design for an ageing population these preferences are important because designers often wrongly assume a decline in interest in design and physical ability. If these assumptions are prioritised there can be a detrimental effect on the visual sensitivity and emotional value products convey. In the United Kingdom a significant proportion of the ageing population is financially independent, physically healthy and resistant to traditionally negative associations of ageing. However, limited interrogation of the design process, or of the products produced, leaves a largely youth orientated design industry ill- equipped to challenge these associations and design for consumers whose experiences differ from their own. This investigation interviewed leading design professionals to test these assumptions and to inform an innovative questionnaire to identify visual preference. The questionnaire incorporated images of domestic products from 1930 to 1990 and asked for rapid responses reflecting intuitive preferences. A fifty five percent , response rate was achieved from 5,000 questionnaires posted to respondents aged fifty to seventy five years. Analysis of the findings identified two associations. Firstly, a statistically small association between age and visual preference, older respondents preferred older products, although the association was marginal and insufficient to support the hypothesis. Secondly, visual analysis revealed a strong preference for the most familiar form of the product, proposed as representing the 'contemporary essence'. These findings challenge assumptions that ageing is accompanied by a decline in design interest. Rather, the economic and social cost of establishing a design environment reduces the flexibility of future choices. These issues are age neutral. To address these issues, a critically reflective design approach is proposed as a positive response to an ageing population in an inclusive society.
The wind-driven halo in high-contrast images I: analysis from the focal plane images of SPHERE
Creators: name: Cantalloube, Faustine
name: Farley, Ollie
name: Milli, Julien
name: Bharmal, Nazim Ali
name: Brandner, Wolfgang
name: Correia, Carlos
name: Dohlen, Kjetil
name: Henning, Th
name: Osborn, James
name: Por, Emiel
name: Valles, M Suárez
name: Vigan, Arthur
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Context. The wind driven halo is a feature observed within the images delivered by the latest generation of ground-based instruments equipped with an extreme adaptive optics system and a coronagraphic device, such as SPHERE at the VLT. This signature appears when the atmospheric turbulence conditions are varying faster than the adaptive optics loop can correct. The wind driven halo shows as a radial extension of the point spread function along a distinct direction (sometimes referred to as the butterfly pattern). When present, it significantly limits the contrast capabilities of the instrument and prevents the extraction of signals at close separation or extended signals such as circumstellar disks. This limitation is consequential because it contaminates the data a substantial fraction of the time: about 30% of the data produced by the VLT/SPHERE instrument are affected by the wind driven halo.Aims. This paper reviews the causes of the wind driven halo and presents a method to analyze its contribution directly from the scientific images. Its effect on the raw contrast and on the final contrast after post-processing is demonstrated.Methods. We used simulations and on-sky SPHERE data to verify that the parameters extracted with our method are capable of describing the wind driven halo present in the images. We studied the temporal, spatial and spectral variation of these parameters to point out its deleterious effect on the final contrast.Results. The data driven analysis we propose does provide information to accurately describe the wind driven halo contribution in the images. This analysis justifies why this is a fundamental limitation to the final contrast performance reached.Conclusions. With the established procedure, we will analyze a large sample of data delivered by SPHERE in order to propose, in the future, post-processing techniques tailored to remove the wind driven halo.
description: Astronomy and Astrophysics - A&A, EDP Sciences, In press
A study of some morphophysiological factors affecting yield of Pigeonpea grown and their relevance to high intensity production system
Etude de quelques facteurs du rendement du Pois d'Angole en système de culture intensif
Creators: name: Fakir, M.S.A.
name: McDavid, C.R.
name: Umaharan, P.
name: Fakir, M.S.A.
name: McDavid, C.R.
name: Umaharan, P.
Publisher: name: Unknown
Year: 1993
Subjects: Crop Production/Industries
Research and Development/Tech Change/Emerging Technologies

description: A field study was conducted with 38 F6 lines to investigate abscission patterns and their relationship with yield. The rate of abscission increased with the progression of floral nodal position and time after first flowering implying that genotypes with fewer inflorescence nodes and a shorter, synchronous flowering period might have lower abscission rates and be useful for high intensity production. Abscission rate was found to be negatively correlated with yield suggesting that abscission is an important yield limiting factor and genotypic differences in abscission rate were found which could be utilized in breeding a high yielding cultivar. A green house study using rooting boxes demonstrated variations in both canopy and rooting patterns. The results showed that increased number of branches and low branch angle contributed to an erect and compact canopy in ICPH 8 which had also the highest shoot/root ratio. These results suggest that selection of genotypes similar to ICPH 8 might increase productivity at higher planting density. The physiological implications of some of the variation demonstrated are discussed.
The substitution account: the problem, the techniques and the politics
Creators: name: MICOSSI, S.
name: SACCOMANNI, F.
Publisher: name: PSL Quarterly Review
Year: 2013
Subjects: subject: Substitution Account, technical features, payments imbalances, world economy
subject: F33

description: The present paper argues that in a longer-term perspective many of the problems and difficulties which caused the Substitution Account (SA) project to be scrapped are not as compelling as they previously appeared to be. The authors first review the purposes of the SA before looking at its main technical features. The reasons which prevented an agreement from being reached in Hamburg are then considered. The potential usefulness of a substitution scheme is then assessed agains the prospect of persisting payments imbalances in the world economy and of an emerging multi-currency reserve system. JEL: F33
description: PSL Quarterly Review, V. 34, N. 137 (1981)
Congruence based proofs of the recognizability theorems for free many-sorted algebras
Creators: name: Vidal, Juan Climent
name: Llópez, Enric Cosme
Publisher: name: arXiv
Year: 2018
Subjects: subject: Formal Languages and Automata Theory (cs.FL)
subject: FOS: Computer and information sciences

description: We generalize several recognizability theorems for free single-sorted algebras to the field of many-sorted algebras and provide, in a uniform way and without using neither regular tree grammars nor tree automata, purely algebraic proofs of them based on the concept of congruence.
A Conley index study of the evolution of the Lorenz strange set
Creators: name: Barge, Héctor
name: Sanjurjo, J. M. R.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Dynamical Systems (math.DS)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: In this paper we study the Lorenz equations using the perspective of the Conley index theory. More specifically, we examine the evolution of the strange set that these equations posses throughout the different values of the parameter. We also analyze some natural Morse decompositions of the global attractor of the system and the role of the strange set in these decompositions. We calculate the corresponding Morse equations and study their change along the successive bifurcations. In addition, we formulate and prove some theorems which are applicable in more general situations. These theorems refer to Poincaré-Andronov-Hopf bifurcations of arbitrary codimension, bifurcations with two homoclinic loops and a study of the role of the travelling repellers in the transformation of repeller-attractor pairs into attractor-repeller ones.
description: 23 pages, 1 figure
Polarization entanglement visibility of photon pairs emitted by a quantum dot embedded in a microcavity
Creators: name: Perea, J. I.
name: Tejedor, C.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the photon emission from a quantum dot embedded in a microcavity. Incoherent pumping of its excitons and biexciton provokes the emission of leaky and cavity modes. By solving a master equation we obtain the correlation functions required to compute the spectrum and the relative efficiency among the emission of pairs and single photons. A quantum regime appears for low pumping and large rate of emission. By means of a post-selection process, a two beams experiment with different linear polarizations could be performed producing a large polarization entanglement visibility precisely in the quantum regime.
description: 13 pages and 6 figures
Strangers and neighbours: cross-border banking in North America
Creators: name: DEAN, J.W.
name: GIDDY, I.
Publisher: name: PSL Quarterly Review
Year: 2013
Subjects: subject: U.S., Canada, cross-border banking, regulation, reciprocity, North America
subject: G21

description: The paper is concerned with regulatory and competitive aspects of the mutual penetration by Canadian and U.S. banks of each other’s domestic markets. The authors assess the degree to which economic factors alone are responsible for the difference in growth rates between domestic and foreign banks in North America. They argue that regulation has not affected the growth of foreign banks in North America by addressing the question of reciprocity in banking regulations, before examining foreign banks in the U.S. and the manner in which they have been regulated. U.S. banks operating in Canada are then dealt with. Finally, the results of an empirical test of the proposition that the growth of cross-border banking is attributable to factors other than differential regulation is presented. JEL: G21
description: PSL Quarterly Review, V. 34, N. 137 (1981)
The composition of the investment under conditions of non uniform changes
Creators: name: HALEVI, J.
Publisher: name: PSL Quarterly Review
Year: 2013
Subjects: subject: Adolph Lowe, Dobb, Kalecki, socialist planning, production, labour force
subject: E22, B51, P33

description: The present paper discusses Professor Adolph Lowe’s analysis of an economy subject to discontinuous changes, in relation to some aspects of the works by Maurice Dobb and Michael Kalecki on socialist planning. The main thrust of the argument is directed towards the implications of looking at production as a process involving specificity of equipment and complementarity between the latter and the labour force actually employed. Both phenomena arise whenever output is governed by what Marx called an organised system of machinery. JEL: E22, B51, P33
description: PSL Quarterly Review, V. 34, N. 137 (1981)
Exons, introns and DNA thermodynamics
Creators: name: Carlon, Enrico
name: Malki, Mehdi Lejard
name: Blossey, Ralf
Publisher: name: arXiv
Year: 2004
Subjects: subject: Biomolecules (q-bio.BM)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: The genes of eukaryotes are characterized by protein coding fragments, the exons, interrupted by introns, i.e. stretches of DNA which do not carry any useful information for the protein synthesis. We have analyzed the melting behavior of randomly selected human cDNA sequences obtained from the genomic DNA by removing all introns. A clear correspondence is observed between exons and melting domains. This finding may provide new insights in the physical mechanisms underlying the evolution of genes.
description: 4 pages, 8 figures - Final version as published. See also Phys. Rev. Focus 15, story 17
An economist’s career: what? why? how?
Creators: name: TRIFFIN, R.
Publisher: name: PSL Quarterly Review
Year: 2013
Subjects: subject: Robert Triffin, biography, reflections
subject: B31

description: The paper is a contribution to a series of recollections and reflections on the professional experiences of distinguished economists which the Banca Nazionale del Lavoro Quarterly Review started in 1979. In it Robert Triffin provides personal reflections on his career, his personal brand of practical economics, and his life philosophy. JEL: B31
description: PSL Quarterly Review, V. 34, N. 138 (1981)
The European Monetary System: the first two years –introduction
Creators: name: THYGESEN, N.
Publisher: name: PSL Quarterly Review
Year: 2013
Subjects: subject: EMS, Robert Triffin, Ford Foundation, performance
subject: E42, F36

description: The experiences with the European Monetary System during its first two years was the subject of the fourth and final seminar in a series organised by Robert Triffin under a grant from the Ford Foundation. While the first three seminars had been largely forward looking, the main purpose of the final seminar was to evaluate how the EMS had actually work. This introduction provides a summary of most of the contributions to the Copenhagen seminar. JEL: E42, F36
description: PSL Quarterly Review, V. 34, N. 138 (1981)
Assessment of Colletotrichum gloeosporioides as a biological control of hemlock dwarf mistletoe (Arceuthobium tsugense)
Creators: name: Askew, Sue Ellen
Publisher: name: University of British Columbia
Year: 2011

description: Use of an inundative biological control agent, Colletotrichum gloeosporioides, may provide an alternate method to control Arceuthobium tsugense (hemlock dwarf mistletoe) in the coastal forests of British Columbia, especially in variable retention areas, and in riparian and sensitive ecosystems. Variable retention practices can lead to in an increase in hemlock dwarf mistletoe infection, resulting in a loss of tree growth and vigor, reduction in wood quality, and tree death. Five Pacific Forestry Centre (PFC) C. gloeosporioides isolates were screened for conidia production, virulence, and lineal growth rate in culture. Results of this screening and a small field trial revealed that isolate PFC 2415 showed the most promising biological control agent characteristics. The highest number of C. gloeosporioides conidia was produced on the millet substrate compared to rice, slow oats and wheat bran. A field trial using PFC 2415 in three treatments applied in late August 2002 (a Stabileze preparation sprayed on (1) intact mistletoe swellings and (2) on swellings on which all mistletoe shoots had been cut at 0.5 cm, and (3) a sucrose and gelatin preparation sprayed on intact mistletoe swellings) and their respective controls formulated without living inoculum was conducted near Nanaimo, BC. Stabileze® and sucrose-gelatin treatments formulated with C. gloeosporioides reduced the current berry crop by 16 to 36 percent respectively (p<0.05). While the results for shoots appeared promising, heavy background infection and/or secondary infection, especially on controls, limited the ability to detect clear treatment effects. Careful culturing from various live and dead host tissues showed that C. gloeosporioides was unable to invade and kill the mistletoe endophytic system within the living xylem and phloem of the host.
On possible skewon effects on light propagation
Creators: name: Obukhov, Yuri N.
name: Hehl, Friedrich W.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Classical Physics (physics.class-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We start from a local and linear spacetime relation between the electromagnetic excitation and the field strength. Then we study the generally covariant Fresnel surfaces for light rays and light waves. The metric and the connection of spacetime are left unspecified. Accordingly, our framework is ideally suited for a search of possible violations of the Lorentz symmetry in the photon sector of the extended standard model. We discuss how the skewon part of the constitutive tensor, if suitably parametrized, influences the Fresnel surfaces and disturbs the light cones of vacuum electrodynamics. Conditions are specified that yield the reduction of the original quartic Fresnel surface to the double light cone structure (birefringence) and to the single light cone. Qualitatively, the effects of the real skewon field can be compared to those in absorbing material media. In contrast, the imaginary skewon field can be interpreted in terms of non-absorbing media with natural optical activity and Faraday effects. The astrophysical data on gamma-ray bursts are used for deriving an upper limit for the magnitude of the skewon field.
description: Revtex, 29 pages, 10 figures, references added, text as in the published version
Stable approximation schemes for optimal filters
Creators: name: Crisan, Dan
name: Lopez-Yela, Alberto
name: Miguez, Joaquin
Publisher: name: arXiv
Year: 2018
Subjects: subject: Computation (stat.CO)
subject: Probability (math.PR)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: 60G35, 60J05, 62M20

description: A stable filter has the property that it asymptotically `forgets' initial perturbations. As a result of this property, it is possible to construct approximations of such filters whose errors remain small in time, in other words approximations that are uniformly convergent in the time variable. As uniform approximations are ideal from a practical perspective, finding criteria for filter stability has been the subject of many papers. In this paper we seek to construct approximate filters that stay close to a given (possibly) unstable filter. Such filters are obtained through a general truncation scheme and, under certain constraints, are stable. The construction enables us to give a characterisation of the topological properties of the set of optimal filters. In particular, we introduce a natural topology on this set, under which the subset of stable filters is dense.
Simulation of Alfven wave propagation in magnetic chromosphere with radiative loss: effects of non-linear mode coupling on chromospheric heating
Creators: name: Wang, Yikang
name: Yokoyama, Takaaki
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We perform magnetohydrodynamic (MHD) simulations to investigate the propagation of Alfven wave in magnetic chromosphere. We use the 1.5-dimensional expanding flux tube geometry setting and transverse perturbation at the bottom to generate the Alfven wave. Compared with previous studies, our expansion is that we include the radiative loss term introduced by Carlsson & Leenaarts (2012). We find that when an observation based transverse wave generator is applied, the spatial distribution of the time-averaged radiative loss profile in our simulation is consistent with that in the classic atmospheric model. In addition, the energy flux in the corona is larger than the required value for coronal heating in the quiet region. Our study shows that the Alfven wave driven model has the potential to explain chromospheric heating and transport enough energy to the corona simultaneously.
description: Accepted by ApJ
Infinitesimal rigidity in normed planes
Creators: name: Dewar, Sean
Publisher: name: arXiv
Year: 2018
Subjects: subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: 52C25, 52A21

description: We prove that a graph has an infinitesimally rigid placement in a non-Euclidean normed plane if and only if it contains a $(2,2)$-tight spanning subgraph. The method uses an inductive construction based on generalised Henneberg moves and the geometric properties of the normed plane. As a key step, rigid placements are constructed for the complete graph $K_4$ by considering smoothness and strict convexity properties of the unit ball.
description: 26 pages
Lorentz violation and neutrinos
Creators: name: Mewes, Matthew
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Neutrino oscillations provide an opportunity for sensitive tests of Lorentz invariance. This talk reviews some aspects of Lorentz violation in neutrinos and the prospect of testing Lorentz invariance in neutrino-oscillation experiments. A general Lorentz-violating theory for neutrinos is discussed, and some signals of Lorentz violation are identified.
description: Presented at 3rd Meeting on CPT and Lorentz Symmetry (CPT 04), Bloomington, Indiana, 4-7 Aug 2004
Growth series of CAT(0) cubical complexes
Creators: name: Okun, Boris
name: Scott, Richard
Publisher: name: arXiv
Year: 2018
Subjects: subject: Group Theory (math.GR)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 20F10, 20F55, 05A15

description: Let $X$ be a CAT(0) cubical complex. The growth series of $X$ at $x$ is $G_{x}(t)=\sum_{y \in Vert(X)} t^{d(x,y)}$, where $d(x,y)$ denotes $\ell_{1}$-distance between $x$ and $y$. If $X$ is cocompact, then $G_{x}$ is a rational function of $t$. In the case when $X$ is the Davis complex of a right-angled Coxeter group it is a well-known that $G_{x}(t)=1/f_{L}(-t/(1+t))$, where $f_{L}$ denotes the $f$-polynomial of the link $L$ of a vertex of $X$. We obtain a similar formula for general cocompact $X$. We also obtain a simple relation between the growth series of individual orbits and the $f$-polynomials of various links. In particular, we get a simple proof of reciprocity of these series ($G_{x}(t)=\pm G_{x}(t^{-1})$) for an Eulerian manifold $X$.
description: 8 pages
Ardmore Field - rebirth of the UK’s first offshore oilfield
Creators: name: J. G. GLUYAS
name: B. MAIR
name: P. SCHOFIELD
name: P. ARKLEY
name: D. McRAE
Publisher: name: Geological Society of London
Year: 2020
Subjects: subject: Geology
subject: FOS: Earth and related environmental sciences

description: The UK’s first offshore oil production began in June 1975 from the Argyll Field. In a 17 year period the field produced 73 million barrels of sweet, light crude. However, in 1992 production from the field became uneconomic and the field was abandoned. All wells were plugged and all facilities removed. Ten years later in January 2002 two new oil companies, Tuscan Energy and Acorn Oil and Gas were awarded the licence to reactivate the Argyll Field - now renamed Ardmore. A field development plan was submitted to the DTI and approval granted in October 2002. New wells were drilled in the summer of 2003 and first (or should that be second) oil will flow in October 2003. Ardmore is a geologically complex field with oil having been won from four distinct reservoirs, of which at least three appear to be in both pressure and fluid communication. During the 'Argyll' production years (1975-2002) vuggy, fractured, Zechstein carbonates appeared to deliver about 80% of their oil in place. Much of this oil must have come from the underlying Rotliegend sandstone and Devonian sandstone. Natural aquifer support was probably only significant in the Rotliegend interval while the volumetrically dominant Devonian sandstones had the poorest recovery. Recovery from Jurassic sandstones on the west flank of Ardmore was minimal. This core display shows two of the four produced horizons with examples of the heterogeneous and variable quality Devonian, and the high quality.
Processing Plant Cost Estimation System: Documentation and User's Guide
Creators: name: Hise, Billy R.
name: Ethridge, Don E.
name: Shaw, Dale L.
name: Hise, Billy R.
name: Ethridge, Don E.
name: Shaw, Dale L.
Publisher: name: Unknown
Year: 1980
Subjects: subject: Crop Production/Industries
subject: Simulation model
subject: costs
subject: returns
subject: processing plants

description: A generalized computer model was developed for the purpose of simu­lating costs and returns for different types of processing plants. This report presents the economic rationale for the model program and the model documentation. An explanation of procedures for using the model is given in general terms with an example of how the model was used to simulate costs and revenues for a cottonseed oil mill.
Cottonseed Oil Mill Simulation Model: Documentation and User's Guide
Creators: name: Hise, Billy R.
name: Hise, Billy R.
Publisher: name: Unknown
Year: 1980
Subjects: subject: Crop Production/Industries
subject: Cottonseed oil mill
subject: simulation model
subject: computer model
subject: costs
subject: returns

description: A computer model for simulating costs and returns of cottonseed oil mills was developed using an economic-engineering approach. This report documents the computer model and explains specific input cost items and output relationships of cottonseed processing. An example data set and a computer run based on that data set are used to assist in explaining the use of the computer model. Technical details for constructing a data set and using the computer model are given in the appendices.
title: Rubbish politics in Buenos Aires
Creators: name: Newell, Lucila María
Publisher: name: The Open University
Year: 2011

description: This thesis investigates the politics of rubbish in Buenos Aires. In the aftermath of the financial and political crisis of 2001-2002, the proliferation of carton eros (rubbish pickers) on the streets of Buenos Aires provoked a controversy around rubbish. This thesis examines the issues that were raised and the changes that followed this controversy in order to understand the different ways that rubbish matters matter in how politics is done, and in how democracy is enacted in Buenos Aires, Argentina. It uses insights from actor-network theory and theories of materiality in dialogue with political and democratic theory, worked through an ethnographic study in two different sites, Moreno and Bajo Flores. The thesis makes three main claims. First, the analysis of the ways rubbish became political challenges discursive and agonistic accounts of the relations and things that count in the making of an issue. Secondly, this thesis shows how paying attention to the material practices that are involved in the way rubbish is governed, from its administration, collection, burial, to separation by a cooperative of carton eros, shapes a material politics that cannot easily be reduced to the formation of a unique social ordering, and thus, complicate the ways that the 'good' can be defined. Finally, this research shows how the 'good' is constructed through the staging of devices that enact and specify the meaning of particular democratic principles in the development of a participatory environmental project. In this way, this thesis demonstrates how the material geographies of rubbish matter to how politics and democracy is practiced.
Higgs Boson Production with Bottom Quarks at Hadron Colliders
Creators: name: Dawson, S.
name: Jackson, C. B.
name: Reina, L.
name: Wackeroth, D.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present results for the production cross section of a Higgs Boson with a pair of bottom/anti-bottom quarks, including next-to-leading order (NLO) QCD corrections.
description: 3 pages, 2 figures, uses ws-ijmpa.cls. Talk given by C.B. Jackson at the Meeting of the Division of Particles and Fields (DPF2004) in Riverside, CA, August 26-31, 2004
The first two years of the EMS: the exchange-rate experience
Creators: name: MASERA, R.S.
Publisher: name: PSL Quarterly Review
Year: 2013
Subjects: subject: EMS, exchange rate, currencies, dollar, policies
subject: E42, F36

description: This paper was presented at the Fourth International Seminar on European Economic and Monetary Union, held in Copenhagen in March of 1981. The work provides an overview of exchange rate developments in the EMS during its first two years. The author concentrates on the system’s evolution in the light of developments vas-à-vis third currencies, notably the US dollar. Some considerations on the question of coordination of EEM exchange rate policies with regard to the dollar are provided. The evolution of effective and real exchange rates is also dealt with. JEL: E42, F36
description: PSL Quarterly Review, V. 34, N. 138 (1981)
Tiwaripotamon Bott 1970
Creators: name: Do, Van Tu
name: Shih, Hsi-Te
name: Huang, Chao
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Decapoda
Potamidae
Tiwaripotamon

description: Genus Tiwaripotamon Bott, 1970
 Type species: Geothelphusa annamensis Balss, 1914, by original designation.
description: Published as part of Do, Van Tu, Shih, Hsi-Te & Huang, Chao, 2016, A new species of freshwater crab of the genus Tiwaripotamon Bott, 1970 (Crustacea, Brachyura, Potamidae) from northern Vietnam and southern China, pp. 213-219 in Raffles Bulletin of Zoology 64 on page 214, DOI: 10.5281/zenodo.4504348
The first two years of the EMS: the exchange-rate experience. A comment
Creators: name: KORTEWEG, P.
Publisher: name: PSL Quarterly Review
Year: 2013
Subjects: subject: EMS, fixed nominal exchange rates, distortions
subject: E42, F36

description: In this brief note, the author argues that the emphasis on fixed nominal exchange rates inside the EMS creates severe distortions as long as inflation rates are not converging. JEL: E42, F36
description: PSL Quarterly Review, V. 34, N. 138 (1981)
Differential extinction of Vibrational Molecular Overtone Transitions with Gold Nanorods and Non-Trivial Surface Enhanced Near-IR Absorption (SENIRA)
Creators: name: Dadadzhanov, Daler R.
name: Vartanyan, Tigran A.
name: Karabchevsky, Alina
Publisher: name: arXiv
Year: 2019
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Resonant coupling between plasmonic nanoantennas and molecular vibrational excitations is employed to amplify the weak overtone transitions that reside in the near-infrared. We explore for the first time the differential extinction of forbidden molecular overtone transitions coupled to the localized surface plasmons. We show that a non-trivial interplay between the molecular absorption enhancement and suppression of plasmonic absorption in a coupled system gives rise to orders of magnitude enhancement of the probe molecule differential extinction. Our results pave a road toward a new class of surface-enhanced near-infrared absorption-based sensors.
description: 12 pages, 6 figures
Lepton flavor violating tau and B decays and heavy neutrinos
Creators: name: He, Xiao-Gang
name: Valencia, G.
name: Wang, Yili
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study lepton flavor violating (LFV) tau and B decays in models with heavy neutrinos to constrain the mixing matrix parameters U_{tau N}. We find that the best current constraints when the heavy neutrinos are purely left-handed come from LFV radiative tau decay modes. To obtain competitive constraints in LFV B decay it is necessary to probe b -> X_{s} tau^{\pm} e^{\mp} at the 10^{-7} level. When the heavy neutrinos have both left and right-handed couplings, the mixing parameters can be constrained by studying LFV B decay modes and LFV tau decay into three charged leptons. We find that the branching ratios B(tau^{\pm} -> l_1^{\pm} l_2^{\pm} l_3^{\mp}), B(B_{s} -> tau^{\pm} e^{\mp}) and B(b -> X_{s} l_1^{\pm} l_2^{\mp}) need to be probed at the 10^{-8} level in order to constrain the mixing parameters beyond what is known from unitarity.
description: 24 pages,8 figures. Discussion and comparison with the literature added. CLEO results updated. Conclusions unchanged
Impact of growth conditions on the domain nucleation and domain wall propagation in Pt/Co/Pt stacks
Creators: name: Quinteros, C. P.
name: Burgos, M. J. Cortes
name: Albornoz, L. J.
name: Gomez, J.
name: Granell, P.
name: Golmar, F.
name: Ibarra, M. L.
name: Bustingorry, S.
name: Curiale, J.
name: Granada, M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Understanding the effect of fabrication conditions on domain wall motion in thin films with perpendicular magnetization is a mandatory issue in order to tune their properties aiming to design spintronics devices based on such phenomenon. In this context, the present work intends to show how different growth conditions may affect domain wall motion in the prototypical system Pt/Co/Pt. The trilayers were deposited by dc sputtering, and the parameters varied in this study were the Co thickness, the substrate roughness, and the base pressure in the deposition chamber. Magneto-optical Kerr effect-based magnetometry and microscopy combined with X-ray reflectometry, atomic force microscopy, and transmission electron microscopy were adopted as experimental techniques. This permitted us to elucidate the impact on the hysteresis loops and on the domain wall dynamics, produced by different growth conditions. As other authors, we found that Co thickness is strongly determinant for both the coercive field and the domain wall velocity. On the contrary, the topographic roughness of the substrate and the base pressure of the deposition chamber evidence a selective impact on the nucleation of magnetic domains and on domain wall propagation, respectively, providing a tool to tune these properties.
Representations of the unitary group SU(2,1) in Fourier term modules
Creators: name: Bruggeman, Roelof W.
name: Miatello, Roberto J.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 11F70, 11F55, 22E30

description: We study Fourier term modules on $\mathrm{SU}(2,1)$, which are the modules arising in Fourier expansions of automorphic forms. Maximal unipotent subgroups $N$ of $\mathrm{SU}(2,1)$ are non-abelian, and we consider the ``abelian'' Fourier term modules connected to characters of $N$, and also the ``non-abelian'' modules described with theta functions. Poincaré series for $\mathrm{SU}(2,1)$ have in general exponential growth. To deal with such generalized automorphic forms we allow exponential growth for the functions in Fourier term modules. We give a complete description of the submodule structure of all Fourier term modules, and discuss the consequences for Fourier expansions of automorphic forms.
description: 167 pages, 45 figures