cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Effects of Contract Farming Scheme on Cassava Production Enterprise in Oyo State, Nigeria
Creators: name: Fawole, Pippy
name: Thomas, Kehinde A.
name: Fawole, Pippy
name: Thomas, Kehinde A.
Publisher: name: Unknown
Year: 2011
Subjects: subject: Community/Rural/Urban Development
subject: Consumer/Household Economics
subject: Demand and Price Analysis
subject: Production Economics
subject: Contract farming
subject: Cassava production enterprise
subject: Access to input
subject: Market

description: There are indications that the domestic demand for cassava particularly as staple food may in no time outweigh that of the industrial sector, except contract and non-contract farming entrepreneurs operate within the framework of sustainable agriculture. The study thus examines the effects of contract farming scheme on cassava production in Oyo State, Nigeria. Multistage sampling technique was used. Oyo and Ibadan/Ibarapa zones were randomly selected from the four Agricultural Development Projects (ADPs) in Oyo State. From the 307 registered farmers under the contract farming arrangement in the selected zones, 20% (62) were randomly selected, while equal number were selected from the list of their non-contract counterparts in two of the four agricultural zones of the state. Data were subjected to descriptive and inferential statistics. Average farm size was 14.56 ± 3.43 and 2.14 ± 0.43 acres for Contract and non-contract farmers respectively with respective average output of 6 and 5.4 tonnes per acre. Majority financed the farm through loan as average distance from home to farm is 5.88km. Hired labour was prominent for farm operations and land for farming is through the community.Contract and non-contract farmers differed significantly in their level of production enterprise (t=19.219, p=0.000). Promotion of contract farming through a well laid out agricultural extension outreach will ensure constant and consistent growth in the agricultural sector and consequently alleviate poverty among rural household in Oyo State.
Analysis of Costs and Returns of Artisanal Fish Marketing in Kebbi State, Nigeria
Creators: name: Suleiman, A.
name: Tosan, Fregene
name: Suleiman, A.
name: Tosan, Fregene
Publisher: name: Unknown
Year: 2011
Subjects: subject: Consumer/Household Economics
subject: Demand and Price Analysis
subject: Food Consumption/Nutrition/Food Safety
subject: Marketing
subject: FOS: Economics and business
subject: Production Economics
subject: Artisanal fishing
subject: Fishing inputs
subject: Cost
subject: Net return

description: Fishermen involved in marketing and distribution of their daily fish catch incur additional cost apart from fishing. This study analysed the costs and returns of artisanal fishing activity in Kebbi State, Nigeria. A multi-stage sampling method was used to select 82 fishermen which constituted the sample size for the study. Descriptive statistics and net return model were used to analyse data collected. Results revealed that 47.1% were within the age range of 25-40 years, 11.8% had formal education and 84.4% were engaged in fishing as their major occupation. The average investment of a fisherman in the study area was estimated at N64,267, while net returns from sales of fresh fish varied between N 58.22 and N 208.2 for whole sellers and retailers respectively. The study concludes that although fishing is profitable, the return on investment is low thereby leaving the operators vulnerable to loss in case of downward shift in market price of fish. The study recommends that more fishermen should be encouraged to seek for alternative sources of income, while others are provided with fishing inputs or trained on modern fishing techniques and fish farming. Inactive fishermen cooperatives should be strengthened for better bargaining power for higher returns.
Duality in quantum transport models
Creators: name: Frassek, Rouven
name: Giardinà, Cristian
name: Kurchan, Jorge
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: Probability (math.PR)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We develop the `duality approach', that has been extensively studied for classical models of transport, for quantum systems in contact with a thermal `Lindbladian' bath. The method provides (a) a mapping of the original model to a simpler one, containing only a few particles and (b) shows that any dynamic process of this kind with generic baths may be mapped onto one with equilibrium baths. We exemplify this through the study of a particular model: the quantum symmetric exclusion process introduced in [D. Bernard, T. Jin, Phys. Rev. Lett. 123, 080601 (2019)]. As in the classical case, the whole construction becomes intelligible by considering the dynamical symmetries of the problem.
description: 8 pages; v2: presentation improved, references added
Transport properties of single channel quantum wires with an impurity: Influence of finite length and temperature on average current and noise
Creators: name: Dolcini, Fabrizio
name: Trauzettel, Bjoern
name: Safi, Ines
name: Grabert, Hermann
Publisher: name: arXiv
Year: 2004
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The inhomogeneous Tomonaga Luttinger liquid model describing an interacting quantum wire adiabatically coupled to non-interacting leads is analyzed in the presence of a weak impurity within the wire. Due to strong electronic correlations in the wire, the effects of impurity backscattering, finite bias, finite temperature, and finite length lead to characteristic non-monotonic parameter dependencies of the average current. We discuss oscillations of the non-linear current voltage characteristics that arise due to reflections of plasmon modes at the impurity and quasi Andreev reflections at the contacts, and show how these oscillations are washed out by decoherence at finite temperature. Furthermore, the finite frequency current noise is investigated in detail. We find that the effective charge extracted in the shot noise regime in the weak backscattering limit decisively depends on the noise frequency $ω$ relative to $v_F/gL$, where $v_F$ is the Fermi velocity, $g$ the Tomonaga Luttinger interaction parameter, and $L$ the length of the wire. The interplay of finite bias, finite temperature, and finite length yields rich structure in the noise spectrum which crucially depends on the electron-electron interaction. In particular, the excess noise, defined as the change of the noise due to the applied voltage, can become negative and is non-vanishing even for noise frequencies larger than the applied voltage, which are signatures of correlation effects.
description: 28 pages, 19 figures, published version with minor changes
Hymenoptera
Creators: name: Shimbori, Eduardo Mitio
name: Costa, Valmir Antonio
name: Zucchi, Roberto Antonio
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera

description: Key to species of Diapriidae, Eulophidae and Pteromalidae (Hymenoptera) parasitoids of fruit flies (Diptera, Tephritidae) in Brazil  1 Fore wing with submarginal, marginal and stigmal veins present (Figs 5, 8, 15); antennae inserted close to or below lower margin of eyes, not on a projecting ledge (Figs 3, 6) (Chalcidoidea)............................................. 2
- Fore wing at most with a short submarginal vein (Figs 16, 17); antennae inserted on a projecting ledge near upper margin of eyes (Figs 1, 2) (Diaprioidea)............................................................................ 6
 2 Tarsi 4-segmented; scutellum with a pair of submedian grooves and a pair of sublateral grooves (Fig. 4) (Eulophidae)...................................................................................... Tetrastichus giffardianus
 - Tarsi 5-segmented; scutellum without longitudinal grooves (Fig. 7) (Pteromalidae)................................. 3
 3 Antennae separated from clypeus, inserted nearly in the middle of face, slightly above lower margin of eyes (Fig. 6); marginal vein distinctly and uniformly thickened (Fig. 8)...................................... Pachycrepoideus vindemmiae
 - Antennae inserted just above oral margin, far below lower margin of eyes (Fig. 3); marginal vein not thickened (Fig. 15) (Spalangia).......................................................................................... 4
 4 Pronotum smooth, with setae on tiny bumps (Fig. 14); median lobe of mesoscutum with a single median pit (Fig. 14)............................................................................................ Spalangia simplex
- Pronotum punctate or reticulate-rugose (Figs 12, 13); medial lobe of mesoscutum with different sculpturing............. 5
 5 Pronotum with circular punctures distinctly separated by smooth interstices (Fig. 12); malar sulcus present; propodeum with paramedian crenulate furrows sub parallel, all cells with similar size................................ Spalangia endius
 - Pronotum mostly reticulate-rugose (Fig. 13); malar sulcus absent; propodeum with paramedian crenulate furrows widened anteriorly, forming a Y, with anterior cells larger than posterior cells................................ Spalangia gemina
 6 Fore wing lacking tubular veins, with a mid-longitudinal fold line, apex with apical notch (Fig. 17)....... Coptera haywardi
 - Fore wing with a tubular vein (submarginal), without fold-line, apex rounded (Fig. 15)...... Trichopria sp. aff. anastrephae
description: Published as part of Shimbori, Eduardo Mitio, Costa, Valmir Antonio & Zucchi, Roberto Antonio, 2020, Annotated checklist and illustrated key to parasitoids (Hymenoptera: Diapriidae Eulophidae and Pteromalidae) of fruit flies (Diptera, Tephritidae) in Brazil, pp. 53-70 in Zootaxa 4858 (1) on page 65, DOI: 10.11646/zootaxa.4858.1.3, http://zenodo.org/record/4411551
Incorporating animal movement into distance sampling
Creators: name: R. Glennie
name: S. T. Buckland
name: R. Langrock
name: T. Gerrodette
name: L. T. Ballance
name: S. J. Chivers
name: M. D. Scott
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biophysics
subject: Genetics
subject: FOS: Biological sciences
subject: Neuroscience
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Inorganic Chemistry
subject: FOS: Chemical sciences

description: Distance sampling is a popular statistical method to estimate the density of wild animal populations. Conventional distance sampling represents animals as fixed points in space that are detected with an unknown probability that depends on the distance between the observer and the animal. Animal movement can cause substantial bias in density estimation. Methods to correct for responsive animal movement exist, but none account for non-responsive movement independent of the observer. Here, an explicit animal movement model is incorporated into distance sampling, combining distance sampling survey data with animal telemetry data. Detection probability depends on the entire unobserved path the animal travels. The intractable integration over all possible animal paths is approximated by a hidden Markov model. A simulation study shows the method to be negligibly biased (less than 5%) in scenarios where conventional distance sampling overestimates abundance by up to 100%. The method is applied to line transect surveys (1999–2006) of spotted dolphins (Stenella attenuata) in the eastern tropical Pacific where abundance is shown to be positively biased by 21% on average, which can have substantial impact on the population dynamics estimated from these abundance estimates and on the choice of statistical methodology applied to future surveys.
Seeing is learning: Vision care for rural and migrant children in China
Creators: name: Zhang, Yanjie
name: Glauben, Thomas
name: Zhang, Yanjie
name: Glauben, Thomas
Publisher: name: Unknown
Year: 2015
Subjects: Community/Rural/Urban Development
Health Economics and Policy

description: Uncorrected vision is prevalent among rural children and those who migrate from rural areas to urban areas with their parents in China, of which more than 20 per cent are nearsighted. Since 2012 the Rural Education Action Program (REAP) has carried out the largest empirical vision care project ever conducted in China. More than 20,000 children in different parts of China have been screened and about 5,000 pairs of eyeglasses have been dispensed to those who are nearsighted. REAP has been able to create a comprehensive picture of vision care for rural and migrant children in China. The successfully implemented project so far has provided valuable lessons for treating vision problems. First, wearing eyeglasses can remarkably improve children's educational performance and self-confidence. Second, in contrast to widespread opinion in rural China, eyeglasses are by no means harmful to children's eyesight. Third, and in contrast to another myth, specific 'eye exercises' used as a traditional alternative to eyeglasses cannot slow the onset or progression of myopia. Finally, teacher incentives to encourage children to wear eyeglasses will improve rates of eyeglasses usage, help to overcome vision problems and thus lower educational barriers. Based on these findings, researchers of the project are currently working with local governments in rural China to incorporate vision care into the healthcare agenda.
title: Grundzüge des Ausländergrunderwerbs in Tirol : unter besonderer Berücksichtigung des Tiroler Grundverkehrsgesetzes
Creators: name: Bayer, Alexander
Publisher: name: TU Wien
Year: 2015
Subjects: subject: Tirol
subject: Grundbuch
subject: Immobilieninvestition
subject: Immobilienrecht
subject: Liegenschaftserwerb

description: Grundsätzlich kann jede natürliche oder juristische Person einschließlich Ausländer Immobilien (bebautes bzw. unbebautes Grundstück, Haus oder Wohnung) in Österreich erwerben. Dabei müssen allerdings die Besonderheiten des österreichischen Rechts berücksichtigt werden. Bis zum endgültigen Eigentumserwerb müssen mehrere Aspekte beachtet werden, wie z.B. der Abschluss des Kaufvertrages, die Eintragung im Grundbuch, die Einhaltung der Bestimmungen des jeweiligen Grundverkehrsgesetzes, eventuell auf dem Grundstück haftende Belastungen und diverse steuerliche Aspekte. Für eine Eigentumsübertragung ist der Abschluss eines Kaufvertrages notwendig, welche eine Einigung zwischen Verkäufer und Käufer über Kaufgegenstand und Preis, sowie sonstige Nebenbestimmungen, vorsieht. Damit ein Kaufvertrag im Grundbuch -verbüchert- werden kann, ist eine schriftliche Urkunde erforderlich, in der die Unterschriften entweder gerichtlich oder notariell beglaubigt wurden. Mit Eintragung im Grundbuch genießen die darin enthaltenen Eintragungen besonderen Schutz, da sich jedermann auf ihre Vollständigkeit und Richtigkeit verlassen darf. Vor Erwerb einer Liegenschaft sollte unbedingt geprüft werden, ob diverse Belastungen hinsichtlich der Liegenschaft (z.B. Pfandrechte, Dienstbarkeiten, Bestandrechte, Belastungs- und Veräußerungsverbote, etc.) im Grundbuch eingetragen sind. Auch sollte die Liegenschaft besichtigt werden, ob offenkundige Lasten (z.B. Wegerechte) erkennbar sind, welche nicht im Grundbuch eingetragen sind. In Tirol bedarf der Erwerb einer Immobilie unter Umständen einer grundverkehrsbehördlichen Genehmigung. Das Grundverkehrsgesetz für Tirol regelt den Grunderwerb durch Inländer und enthält darüber hinaus auch Regelungen für Ausländer. Für den Rechtserwerb durch Ausländer aus Drittstaaten sieht das Grundverkehrsgesetz ein Genehmigungsverfahren mit Erteilung eines Genehmigungsbescheids oder eines Negativattests vor. EU-Bürger sind aufgrund der europarechtlichen Grundfreiheiten Inländer gleichgestellt. Überdies sieht das Grundverkehrsgesetz auch Beschränkungen hinsichtlich des Erwerbs von Ferien- und Zweitwohnsitzen vor. Die Erfüllung der grundverkehrsbehördlichen Bestimmungen ist eine unverzichtbare Voraussetzung für den Grunderwerb in Österreich.
title: Parken 2025 : die Entwicklung der Parkraumbewirtschaftung und das Potential der Sonderimmobilie: Garage
Creators: name: Bichlmaier, Christian
Publisher: name: TU Wien
Year: 2015
Subjects: subject: ruhender Verkehr
subject: Parkraummanagement
subject: Auslastung
subject: Wechselbewegung
subject: Parkplatzsharing

description: Der Immobilienmarkt boomt und es werden jährlich viele Milliarden in diese Assetklassen investiert. Jedes Vermögen veranlagt seine Werte zu einem Großteil in Immobilien und die letzten Jahre haben gezeigt, dass auf Grund der steigenden Immobilienpreise diese Vermögen ebenfalls stetig wachsen. Sowie Wohnraum ist auch Parkraum ein knappes Gut welches auf Grund von steigenden Bevölkerungszahlen, der generellen höheren Lebenserwartung, durch die Verjüngung der älteren Generationen und durch das Wachstum des Fahrzeugbestandes, wird es in diesem Segment immer einen Nachfrage geben. Das Investmentobjekt Parkhaus ist bereit für viele Anleger interessant geworden allerdings kommen solche Objekt äußerst selten auf den Markt. Die gesteigerte Mobilität der Bevölkerung erfordert auch ein gesteigertes Bewusstsein für organisiertes Parkverhalten. Diese Arbeit stellt die Entstehungsgeschichte und die aktuelle Parkraumbewirtschaftung sowie die Sonderimmobilie: Garage in all ihren Facetten dar und analysiert die unterschiedlichen Immobilien- und Nutzungsarten. Es wird ein Überblick über die Parkraumsituation verschafft und auf bereits umgesetzte Lösungsansätze und deren Ergebnisse eingegangen. Die Maßnahmen der letzten Jahrzehnte die für einen geregelten und geordneten ruhenden Verkehr sorgen, haben längst einen Beitrag zu Verbesserung der Verkehrssituation geleistet. Ohne diesen, wäre es in Ballungszentren längst zu einem Verkehrsinfarkt gekommen. Die Manifestierung der Parkplatzproblematik bei Stadt- und Immobilienentwicklung war ein wichtiger Schritt für die Weiterentwicklung unserer Städte und Gesellschaft und trägt zu einem gesteigerten Umweltbewusst sein bei.
Supplementary Material from On geometrical aspects of the graph approach to contextuality
Creators: name: Amaral, Barbara
name: Terra Cunha, Marcelo
Publisher: name: The Royal Society
Year: 2024
Subjects: classificationCode: 490299
subject: Mathematical physics not elsewhere classified
classificationCode: 490499
subject: Pure mathematics not elsewhere classified
classificationCode: 510899
subject: Quantum physics not elsewhere classified

description: Detailed proofs of some theorems
Stripe formation in doped Hubbard ladders
Creators: name: Hager, G.
name: Wellein, G.
name: Jeckelmann, E.
name: Fehske, H.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We investigate the formation of stripes in $7\chunks \times 6$ Hubbard ladders with $4\chunks$ holes doped away from half filling using the density-matrix renormalization group (DMRG) method. A parallelized code allows us to keep enough density-matrix eigenstates (up to $m=8000$) and to study sufficiently large systems (with up to $7\chunks = 21$ rungs) to extrapolate the stripe amplitude to the limits of vanishing DMRG truncation error and infinitely long ladders. Our work gives strong evidence that stripes exist in the ground state for strong coupling ($U=12t$) but that the structures found in the hole density at weaker coupling ($U=3t$) are an artifact of the DMRG approach.
description: 6 pages, 6 Figures
PORTAL--three-dimensional polarized (sub)millimeter line radiative transfer
Creators: name: Lankhaar, Boy
name: Vlemmings, Wouter
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Context. Magnetic fields are important to the dynamics of many astrophysical processes and can typically be studied through polarization observations. Polarimetric interferometry capabilities of modern (sub)millimeter telescope facilities have made it possible to obtain detailed velocity resolved maps of molecular line polarization. To properly analyze these for the information they carry regarding the magnetic field, the development of adaptive three-dimensional polarized line radiative transfer models is necessary. Aims. We aim to develop an easy-to-use program to simulate the polarization maps of molecular and atomic (sub)millimeter lines in magnetized astrophysical regions, such as protostellar disks, circumstellar envelopes, or molecular clouds. Methods. By considering the local anisotropy of the radiation field as the only alignment mechanism, we can model the alignment of molecular or atomic species inside a regular line radiative transfer simulation by only making use of the converged output of this simulation. Calculations of the aligned molecular or atomic states can subsequently be used to ray trace the polarized maps of the three-dimensional simulation. Results. We present a three-dimensional radiative transfer code, POlarized Radiative Transfer Adapted to Lines (PORTAL), that can simulate the emergence of polarization in line emission through a magnetic field of arbitrary morphology. Our model can be used in stand-alone mode, assuming LTE excitation, but it is best used when processing the output of regular three-dimensional (nonpolarized) line radiative transfer modeling codes. We present the spectral polarization map of test cases of a collapsing sphere and protoplanetary disk for multiple three-dimensional magnetic field morphologies.
description: 13 pages, 8 figures, Accepted for publication in A&A
Clustering transition in a system of particles self-consistently driven by a shear flow
Creators: name: Lopez, Cristobal
Publisher: name: arXiv
Year: 2004
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We introduce a simple model of active transport for an ensemble of particles driven by an external shear flow. Active refers to the fact that the flow of the particles is modified by the distribution of particles itself. The model consists in that the effective velocity of every particle is given by the average of the external flow velocities felt by the particles located at a distance less than a typical radius, $R$. Numerical analysis reveals the existence of a transition to clustering depending on the parameters of the external flow and on $R$. A continuum description in terms of the number density of particles is derived, and a linear stability analysis of the density equation is performed in order to characterize the transitions observed in the model of interacting particles.
description: 11 pages, 2 figures. To appear in PRE
Mass exodus from Kosovo: How a struggling state loses its citizens
Creators: name: Möllers, Judith
name: Arapi-Gjini, Arjola
name: Xhema, Sherif
name: Herzfeld, Thomas
name: Möllers, Judith
name: Arapi-Gjini, Arjola
name: Xhema, Sherif
name: Herzfeld, Thomas
Publisher: name: Unknown
Year: 2015
Subjects: Community/Rural/Urban Development
Labor and Human Capital

description: A remarkable exodus from Kosovo occurred in the winter 2014/15, raising urgent questions about its underlying drivers and implications for both Kosovo and the destination countries. This policy brief provides a first-hand qualitative snapshot of key migration drivers, as well as insights on some particularities of the phenomenon. We find that the exodus is the result of a struggling Kosovar state, which failed to maintain the enthusiasm and hope of its young nation and turn it into sustainable development. Instead, a lack of perspectives and accumulated frustration about the existing political caste, nepotism and corruption drive out even middle class people. The extent and timing of the migration wave was closely connected with facilitated travel conditions and incentivising rumours that caused a snowball effect. We argue that EU countries will have to react with patience and care in handling incoming migrants. Changes in the asylum and visa regimes are recommended, but a smart timing of measures is important. Ultimately, to prevent a deepening crisis and possible unrest in Kosovo, temporary legal migration opportunities are needed. Within Kosovo, only breaking up existing structures and establishing efficient institutions and functioning social models in their place could allow the country to overcome its economic deadlock.
J-PAS: Measuring emission lines with artificial neural networks
Creators: name: Martínez-Solaeche, G.
name: Delgado, R. M. González
name: García-Benito, R.
name: de Amorim, A.
name: Pérez, E.
name: Rodríguez-Martín, J. E.
name: Díaz-García, L. A.
name: Fernandes, R. Cid
name: López-Sanjuan, C.
name: Bonoli, S.
name: Cenarro, A. J.
name: Dupke, R. A.
name: Marín-Franch, A.
name: Varela, J.
name: Ramió, H. Vázquez
name: Abramo, L. R.
name: Cristóbal-Hornillo, D.
name: Moles, M.
name: Alcaniz, J.
name: Baqui, P. O.
name: Benitez, N.
name: Carneiro, S.
name: Cortesi, A.
name: Ederoclite, A.
name: Marra, V.
name: de Oliveira, C. Mendes
name: Sodré, L.
name: Vílchez, J. M.
name: Taylor, K.
name: collaboration, JPAS
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Throughout this paper we present a new method to detect and measure emission lines in J-PAS up to $z = 0.35$. J-PAS will observe $8000$~deg$^2$ of the northern sky in the upcoming years with 56 photometric bands. The release of such amount of data brings us the opportunity to employ machine learning methods in order to overcome the difficulties associated with photometric data. We used Artificial Neural Networks (ANNs) trained and tested with synthetic J-PAS photometry from CALIFA, MaNGA, and SDSS spectra. We carry out two tasks: firstly, we cluster galaxies in two groups according to the values of the equivalent width (EW) of $Hα$, $Hβ$, $[NII]{λ6584}$, and $ [OIII]{λ5007}$ lines measured in the spectra. Then, we train an ANN to assign to each galaxy a group. We are able to classify them with the uncertainties typical of the photometric redshift measurable in J-PAS. Secondly, we utilize another ANN to determine the values of those EWs. Subsequently, we obtain the $[NII]/Hα$, $[OIII]/Hβ$, and \ion{O}{3}\ion{N}{2} ratios recovering the BPT diagram . We study the performance of the ANN in two training samples: one is only composed of synthetic J-PAS photo-spectra (J-spectra) from MaNGA and CALIFA (CALMa set) and the other one is composed of SDSS galaxies. We can reproduce properly the main sequence of star forming galaxies from the determination of the EWs. With the CALMa training set we reach a precision of 0.093 and 0.081 dex for the $[NII]/Hα$ and $[OIII]/Hβ$ ratios in the SDSS testing sample. Nevertheless, we find an underestimation of those ratios at high values in galaxies hosting an AGN. We also show the importance of the dataset used for both training and testing the model. ANNs are extremely useful to overcome the limitations previously expected concerning the detection and measurements of the emission lines in surveys like J-PAS.
description: 19 pages, 14 figures, Accepted to A&A
Prolonged inhibitory effects against planktonic growth, adherence, and biofilm formation of pathogens causing ventilator-associated pneumonia using a novel polyamide/silver nanoparticle composite-coated endotracheal tube
Creators: name: Sakkarin Lethongkam
name: Chalongrat Daengngam
name: Chittreeya Tansakul
name: Ratchaneewan Siri
name: Apisit Chumpraman
name: Manthana Phengmak
name: Supayang P. Voravuthikunchai
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Space Science
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified
subject: Cancer
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Microbial cells can rapidly form biofilm on endotracheal tubes (ETT) causing ventilator-associated pneumonia, a serious complication in patients receiving mechanical ventilation. A novel polyamide with a good balance of hydrophilic/hydrophobic moieties was used for the embedment of green-reduction silver nanoparticles (AgNPs) for the composite-coated ETT. The films were conformal with a thickness of ∼ 17 ± 3 µm accommodating high loading of 60 ± 35 nm spherical-shaped AgNPs. The coated ETT resulted in a significant difference in reducing both planktonic growth and microbial adhesion of single and mixed-species cultures, compared with uncoated ETT (p Pseudomonas aeruginosa and Staphylococcus aureus, commonly encountered pathogens, was inhibited by > 96% after incubation for 72 h. Polyamide/AgNP composite-coated ETT provided a broad-spectrum activity against both Gram-positive and Gram-negative bacteria as well as Candida albicans and prolonged antimicrobial activity.
An ALMA view of SO and SO$_2$ around oxygen-rich AGB stars
Creators: name: Danilovich, T.
name: Richards, A. M. S.
name: Decin, L.
name: Van de Sande, M.
name: Gottlieb, C. A.
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: We present and analyse SO and SO$_2$, recently observed with high angular resolution and sensitivity in a spectral line survey with ALMA, for two oxygen-rich AGB stars: the low mass-loss rate R Dor and high mass-loss rate IK Tau. We analyse 8 lines of SO detected towards both stars, 78 lines of SO$_2$detected towards R Dor and 52 lines of SO$_2$ detected towards IK Tau. We detect several lines of $^{34}$SO, $^{33}$SO and $^{34}$SO$_2$ towards both stars, and tentatively S$^{18}$O towards R Dor, and hence derive isotopic ratios for these species. The spatially resolved observations show us that the two sulphur oxides are co-located towards R Dor and trace out the same wind structures in the circumstellar envelope (CSE). Much of the emission is well reproduced with a Gaussian abundance distribution spatially centred on the star. Emission from the higher energy levels of SO and SO$_2$ towards R Dor provide evidence in support of a rotating inner region of gas identified in earlier work. The new observations allow us to refine the abundance distribution of SO in IK Tau derived from prior observations with single antennas, and confirm the distribution is shell-like with the peak in the fractional abundance not centred on the star. The confirmation of different types of SO abundance distributions will help fine-tune chemical models and allows for an additional method to discriminate between low and high mass-loss rates for oxygen-rich AGB stars.
description: Accepted for publication in MNRAS
Nichols-Woronowicz algebra model for Schubert calculus on Coxeter groups
Creators: name: Bazlov, Yuri
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: 20G42 (Primary), 20F55, 14M15 (secondary)

description: We realise the cohomology ring of a flag manifold, more generally the coinvariant algebra of an arbitrary finite Coxeter group W, as a commutative subalgebra of a certain Nichols algebra in the Yetter-Drinfeld category over W. This gives a braided Hopf algebra version of the corresponding Schubert calculus. Our proof is based on methods of braided differential calculus rather than on working directly with the relations in the Nichols algebra, which are not known explicitly. We also discuss the relationship between Fomin-Kirillov quadratic algebras, Kirillov-Maeno bracket algebras and our construction.
description: v2: New section added where the nilCoxeter algebra is realised in the Nichols-Woronowicz algebra; switched from left to (more convenient) right braided partial derivatives; references and acknowledgments added
Destabilization of U(1) Dirac spin-liquids on two dimensional non-bipartite lattices by quenched disorder
Creators: name: Dey, Santanu
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The stability of the Dirac spin-liquid on two-dimensional lattices has long been debated. It was recently demonstrated [Nature Commun. 10, 4254 (2019) and Phys. Rev. B 93, 144411 (2016)] that the staggered $π$-flux Dirac spin-liquid phase on the non-bipartite triangular lattice may be stable in the clean limit. However, quenched disorder plays a crucial role in determining whether such a phase is experimentally viable. For SU(2) spin systems, the effective zero-temperature, low-energy description of Dirac spin-liquids in $(2+1)$ dimensions is given by the compact quantum electrodynamics ($\rm cQED_{2+1}$) which admits monopoles. It is already known that generic quenched random perturbations to the non-compact version of $\rm QED_{2+1}$ (where monopoles are absent) lead to strong-coupling instabilities. In this paper we study $\rm cQED_{2+1}$ in the presence of a class of time-reversal invariant quenched disorder perturbations. We show that in this model, random non-Abelian vector potentials make the symmetry-allowed monopole operators more relevant. The disorder-induced underscreening of monopoles, thus, generically makes the gapless spin-liquid phase fragile.
description: Updated version as published. 14 pages, 3 figures
Open access: istruzioni per l'uso Facoltà di Medicina e Chirurgia
Creators: name: Commissione Open Science Università di Milano
name: Direzione Performance, assicurazione qualità, valutazione e politiche di Open Science Università di Milano
Publisher: name: Zenodo
Year: 2024
Subjects: open access

description: La Commissione Open Science di Ateneo, seguendo l'utile esempio dell'Università di Utrecht (de Boer, J., Bosman, J., Holwerda, F., Jetten, N., Livio, C., Ryane, N., Shetty, R., de Vries, H., & Utrecht University Library - Publishing Support. (2024). Open Access Faculty Toolkit. Zenodo. https://doi.org/10.5281/zenodo.12703515), mette a disposizione dei professori e ricercatori della Facoltà di Medicina e Chirurgia delle "istruzioni per l'uso" sulla pubbicazione ad accesso aperto che considerano le diverse possibilità a disposizione e ne mettono in evidenza pro e contro, sottolineando anche le azioni che gli autori possono fare.
title: Θεωρία κινδύνου στις χρηματοοικονομικές αγορές
titleType: AlternativeTitle
title: Risk theory in financial markets
Creators: name: Xristopoulou, Marianna P.
Publisher: name: National Technological University of Athens
Year: 2011
Subjects: Θεωρία κινδύνου
Χρηματοοικονομικές αγορές
Μέτρα κινδύνου
Συνεπή μέτρα κινδύνου
Διαχωριστική ανάλυση
Risk theory
Financial markets
Risk measures
Coherent risk measures
Discriminant analysis

description: 88 σ.
description: Στην παρούσα διπλωματική εργασία αρχίζουμε με μια σύντομη περιγραφή της θεωρίας των συνεπών μέτρων κινδύνου (Coherent Measures of Risk). Έπειτα αναλύουμε τη σημαντικότητα της πληροφορίας για τις επιχειρήσεις και τη μέθοδο της διαχωριστικής ανάλυσης, η οποία χρησιμοποιείται ευρέως από τις επιχειρήσεις σήμερα. Τέλος, αναλύουμε τα χρηματοοικονομικά παράγωγα, που χρησιμοποιούνται ως ένας τρόπος προστασίας των επιχειρήσεων και μελετούμε τα υποδείγματα αποτίμησης των μετοχών.
Figure S1 from After the bite: bacterial transmission from grey seals (Halichoerus grypus) to harbour porpoises (Phocoena phocoena)
Creators: name: Gilbert, Maarten J.
name: IJsseldijk, Lonneke L.
name: Rubio-García, Ana
name: Gröne, Andrea
name: Duim, Birgitta
name: Rossen, John
name: Aldert L. Zomer
name: Wagenaar, Jaap A.
Publisher: name: The Royal Society
Year: 2020
Subjects: subject: Microbiology
subject: FOS: Biological sciences

description: Phylogeny (neighbour-joining, 500 bootstraps) based on partial 16S rRNA sequences of all Mycoplasma OTUs in this study and reference species.
Boundary height fields in the Abelian sandpile model
Creators: name: Piroux, Geoffroy
name: Ruelle, Philippe
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Other Condensed Matter (cond-mat.other)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the abelian sandpile model on the upper half plane, and reconsider the correlations of the four height variables lying on the boundary. For more convenience, we carry out the analysis in the dissipative (massive) extension of the model and identify the boundary scaling fields corresponding to the four heights. We find that they all can be accounted for by the massive pertubation of a c=-2 logarithmic conformal field theory.
description: 19 pages, 3 figures
Figure S2 from After the bite: bacterial transmission from grey seals (Halichoerus grypus) to harbour porpoises (Phocoena phocoena)
Creators: name: Gilbert, Maarten J.
name: IJsseldijk, Lonneke L.
name: Rubio-García, Ana
name: Gröne, Andrea
name: Duim, Birgitta
name: Rossen, John
name: Aldert L. Zomer
name: Wagenaar, Jaap A.
Publisher: name: The Royal Society
Year: 2020
Subjects: subject: Microbiology
subject: FOS: Biological sciences

description: PCOA plot showing the beta diversity analysis based on unweighted Unifrac for the microbiomes of all samples, including sample names. Each point represents a sample/microbiome. Circles represent the 95% confidence interval for each sample type. Hg, Halichoerus grypus, grey seal; Pv, Phoca vitulina, common seal; Pp, Phocoena phocoena, harbour porpoise.
Flat bands and $Z_2$ topological phases in a non-Abelian kagome lattice
Creators: name: Gao, Zhenxiang
name: Lan, Zhihao
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We introduce a non-Abelian kagome lattice model that has both time-reversal and inversion symmetries and study the flat band physics and topological phases of this model. Due to the coexistence of both time-reversal and inversion symmetries, the energy bands consist of three doubly degenerate bands whose energy and conditions for the presence of flat bands could be obtained analytically, allowing us to tune the flat band with respect to the other two dispersive bands from the top to the middle and then to the bottom of the three bands. We further study the gapped phases of the model and show that they belong to the same phase as the band gaps only close at discrete points of the parameter space, making any two gapped phases adiabatically connected to each other without closing the band gap. Using the Pfaffian approach based on the time-reversal symmetry and parity characterization from the inversion symmetry, we calculate the bulk topological invariants and demonstrate that the unique gapped phases belong to the $Z_2$ quantum spin Hall phase, which is further confirmed by the edge state calculations.
description: replaced with published version
Ageing Well Public Talks Series 2023-24. Talk 1: Are we ready to live longer? Accessible version
Creators: name: Odunewu, Chrispina
Publisher: name: The Open University
Year: 2024
Subjects: classificationCode: 420301
subject: Aged health care
classificationCode: 420303
subject: Family care
classificationCode: 420304
subject: General practice
classificationCode: 420305
subject: Health and community services
classificationCode: 420306
subject: Health care administration
classificationCode: 420307
subject: Health counselling
classificationCode: 420309
subject: Health management
classificationCode: 420311
subject: Health systems
classificationCode: 420399
subject: Health services and systems not elsewhere classified

description: After introducing the Ageing Well Public Talk series by Jitka, we will explore the ageing brain and how we can support our brain with Maintenance Cognitive Stimulation Therapy. Maintenance Cognitive Stimulation Therapy is a programme of activities and discussion, aimed at the general enhancement of cognitive and social functioning.Rachel Turner – Memory Services Coordinator, Age UK Milton Keynes. Rachel has been facilitating Cognitive Maintenance Programmes via Age UK Milton Keynes.Dr Jitka Vseteckova - Senior Lecturer Health and Social Care, Faculty of Wellbeing, Education & Language Studies, The Open University. Jitka has a longstanding interest and passion in researching ageing and engaging with public.
title: Herstellung einer dünnwandigen rotationssymmetrischen Betonschale mit der 'Pneumatic Wedge Method'
Creators: name: Kostic, Marko
Publisher: name: TU Wien
Year: 2015
Subjects: subject: Betonschale

description: An der Technischen Universität Wien sind in den letzten Jahren verschiedene Verfahren für die Herstellung der doppelt gekrümmten Stahlbetonschalen entwickelt worden. Es wird versucht das Bauen von dünnen freigeformten Betonschalen, die eine sehr effektive und ressourcenschonende Bauweise darstellen, wieder ins Leben zu rufen. Diese Diplomarbeit beschäftigt sich mit der Errichtung einer rotationssymmetrischen Betonschale mit der "Pneumatic Wedge Method", einem von der Technischen Universität Wien patentierten Verfahren, bei dem aus einer ebenen Ausgangslage, mithilfe von Hebepneu und Spannlitzen, eine doppelt gekrümmte Schale hergestellt wird. In dieser Arbeit werden die vorauseilenden Vorversuche an den rechteckigen Betonplatten sowie der Großversuch ein einer Schale mit einem Plattendurchmesser von 13,0m beschrieben und näher erläutert.
description: In recent years different construction methods for building double curved concrete shells have been invented and developed at Vienna University of Technology. The goal is a revival and stimulation in construction of thin reinforced concrete shells, which are highly effective structures with optimized bulidung material usage. This master thesis deals with the erection of a rotationally symmetrical concrete shell with "Pneumatic Wedge Method", patented by Vienna University of Technology, from an initially plane plate. The transformation occurs through controlled interaction of a pneuamtic formwork and post-tensioning cables. This thesis includes an overview of previous experiment on rectangular slabs as well as a description of large scale test on a concrete plate with 13,0m diameter.
Coordination Center for the IHRF
Creators: name: Vergos, George
name: Sánchez, Laura
name: BARZAGHI, Riccardo
Publisher: name: Zenodo
Year: 2024
Subjects: IHRF
potential
IHRF CC
geoid
IAG
IGFS

description: IHRF responsibility to deliver the IHRF coordinates (𝑋, 𝑌, 𝑍, 𝐶) of the IHRF reference stations and a catalogue of the vertical datum parameters, i.e., the transformation parameters between the existing local height systems and the IHRF

IHRF CC structure
New locally (super)conformal gauge models in Bach-flat backgrounds
Creators: name: Kuzenko, Sergei M.
name: Ponds, Michael
name: Raptakis, Emmanouil S. N.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: For every conformal gauge field $h_{α(n)\dot α(m)}$ in four dimensions, with $n\geq m >0$, a gauge-invariant action is known to exist in arbitrary conformally flat backgrounds. If the Weyl tensor is non-vanishing, however, gauge invariance holds for a pure conformal field in the following cases: (i) $n=m=1$ (Maxwell's field) on arbitrary gravitational backgrounds; and (ii) $n=m+1 =2 $ (conformal gravitino) and $n=m=2$ (conformal graviton) on Bach-flat backgrounds. It is believed that in other cases certain lower-spin fields must be introduced to ensure gauge invariance in Bach-flat backgrounds, although no closed-form model has yet been constructed (except for conformal maximal depth fields with spin $s=5/2$ and $s=3$). In this paper we derive such a gauge-invariant model describing the dynamics of a conformal gauge field $h_{α(3)\dotα}$ coupled to a self-dual two-form. Similar to other conformal higher-spin theories, it can be embedded in an off-shell superconformal gauge-invariant action. To this end, we introduce a new family of $\mathcal{N}=1$ superconformal gauge multiplets described by unconstrained prepotentials $Υ_{α(n)}$, with $n>0$, and propose the corresponding gauge-invariant actions on conformally-flat backgrounds. We demonstrate that the $n=2$ model, which contains $h_{α(3)\dotα}$ at the component level, can be lifted to a Bach-flat background provided $Υ_{α(2)}$ is coupled to a chiral spinor $Ω_α$. We also propose families of (super)conformal higher-derivative non-gauge actions and new superconformal operators in any curved space. Finally, through considerations based on supersymmetry, we argue that the conformal spin-3 field should always be accompanied by a conformal spin-2 field in order to ensure gauge invariance in a Bach-flat background.
description: 57 pages; v3: comments, references and an appendix added, published version
Comparing focal plane wavefront control techniques:\\Numerical simulations and laboratory experiments
Creators: name: Potier, Axel
name: Baudoz, Pierre
name: Galicher, Raphaël
name: Singh, Garima
name: Boccaletti, Anthony
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Fewer than 1% of all exoplanets detected to date have been characterized on the basis of spectroscopic observations of their atmosphere. Unlike indirect methods, high-contrast imaging offers access to atmospheric signatures by separating the light of a faint off-axis source from that of its parent star. Forthcoming space facilities, such as WFIRST/LUVOIR/HabEX, are expected to use coronagraphic instruments capable of imaging and spectroscopy in order to understand the physical properties of remote worlds. The primary technological challenge that drives the design of these instruments involves the precision control of wavefront phase and amplitude errors. Several FPWS and control techniques have been proposed and demonstrated in laboratory to achieve the required accuracy. However, these techniques have never been tested and compared under the same laboratory conditions. This paper compares two of these techniques in a closed loop in visible light: the pair-wise (PW) associated with electric field conjugation (EFC) and self-coherent camera (SCC). We first ran numerical simulations to optimize PW wavefront sensing and to predict the performance of a coronagraphic instrument with PW associated to EFC wavefront control, assuming modeling errors for both PW and EFC. Then we implemented the techniques on a laboratory testbed. We introduced known aberrations into the system and compared the wavefront sensing using both PW and SCC. The speckle intensity in the coronagraphic image was then minimized using PW+EFC and SCC independently. We demonstrate that both SCC and PW+EFC can generate a dark hole in space-like conditions in a few iterations. Both techniques reach the current limitation of our laboratory bench and provide coronagraphic contrast levels of 5e-9 in a narrow spectral band (<0.25% bandwidth)
description: 12 pages, 11 figures. Accepted for publication in section 13. Astronomical instrumentation of A&A