cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Comparison and assessment of different object-based classifications using machine learning algorithms and UAVs multispectral imagery: a case study in a citrus orchard and an onion crop
Creators: name: Modica, Giuseppe
name: De Luca, Giandomenico
name: Messina, Gaetano
name: Praticò, Salvatore
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Space Science
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences

description: This study aimed to compare and assess different Geographic Object-Based Image Analysis (GEOBIA) and machine learning algorithms using unmanned aerial vehicles (UAVs) multispectral imagery. Two study sites were provided, a bergamot and an onion crop located in Calabria (Italy). The Large-Scale Mean-Shift (LSMS), integrated into the Orfeo ToolBox (OTB) suite, the Shepherd algorithm implemented in the Python Remote Sensing and Geographical Information Systems software Library (RSGISLib), and the Multi-Resolution Segmentation (MRS) algorithm implemented in eCognition, were tested. Four classification algorithms were assessed: K-Nearest Neighbour (KNN), Support Vector Machines (SVM), Random Forests (RF), and Normal Bayes (NB). The obtained segmentations were compared using geometric and non-geometric indices, while the classification results were compared in terms of overall, user’s and producer’s accuracy, and multi-class F-scoreM. The statistical significance of the classification accuracy outputs was assessed using McNemar’s test. The SVM and RF resulted as the most stable classifiers and less influenced by the software used and the scene’s characteristics, with OA values never lower than 81.0% and 91.20%. The NB algorithm obtained the highest OA in the Orchard-study site, using OTB and eCognition. NB performed in Scikit-learn results in the lower (73.80%). RF and SVM obtained an OA>90% in the Crop-study site.
Modelos económicos que explican la restricción crediticia en medianos productores agrícolas en Chile
Creators: name: Reyes, Alvaro
name: Reyes, Alvaro
Publisher: name: Unknown
Year: 2007
Subjects: subject: Community/Rural/Urban Development
subject: Risk and Uncertainty
subject: Credit constraint
subject: Middle-scale farmers.

description: In a competitive and deregulated financial market such as Chile’s, most of the formal lenders to the farming sector are private. However, the total volume of lending has decreased in the last ten years. This phenomenon creates unsatisfied demand for credit, especially for medium-scale farmers who feel credit constrained in their strategies to improve their production system. Most of the studies about credit constraint in developing countries take into account strategies which do not work any longer for market-oriented fruit growers, as farmers in Chile. These types of farmers are in conditions to undertake export processes on their own, without any intermediary trade company. In such a situation, farmers demand long-term credit from formal institutions, which, for some reasons, cannot overcome screening, monitoring or enforcement problems. This study analyzes three models derived from the theory of contracts, using five criteria in assessing credit constraint in middle-scale farming in Chile. The results of this paper determine that the dynamics investment model (Bond and Meghir, 1994), best explains the dynamics of formal credit market in rural areas in Chile.
description: Published by Asociación de Economistas Agrarios de Chile
Additional file 12 of Whole-genome sequencing of glioblastoma reveals enrichment of non-coding constraint mutations in known and novel genes
Creators: name: Sharadha Sakthikumar
name: Ananya Roy
name: Haseeb, Lulu
name: Pettersson, Mats E.
name: Sundström, Elisabeth
name: Voichita D. Marinescu
name: Lindblad-Toh, Kerstin
name: Forsberg-Nilsson, Karin
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 12. Review history.
Uso de modelos hedónicos y de búsqueda para el análisis de precios de vinos en supermercados
Creators: name: Gonzalez, Jose
name: Melo, Oscar
name: Gonzalez, Jose
name: Melo, Oscar
Publisher: name: Unknown
Year: 2008
Subjects: subject: Demand and Price Analysis
subject: hedonic prices
subject: wine
subject: supermarkets.

description: Hedonic price models have been widely used to understand the effect of wine attributes. But these have not properly estimated the effect of quality in the Chilean market. Moreover, we found no study in the literature that has included bottle weight in the hedonic equation. We also try to explain the differences in prices observed for identical product within and between different comunas in Santiago. We explore the role of average income, number of supermarkets, and price variation in explaining these price differences. Results show that quality, measured by scores given by a panel of experts, does have a positive impact on price, and bottle weight has a positive but decreasing impact on price. We also find that average income does not have a significant effect on price differences but supermarket density and price variability does.
description: Published by Asociación de Economistas Agrarios de Chile
Protothea quadripunctata
Creators: name: POORANI, J.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Coccinellidae
Protothea
Protothea quadripunctata

description: Protothea quadripunctata (Mulsant)
(Figs 181, 182a–d)
Thea quadripunctata Mulsant, 1853: 155 (Type locality: l’Asie? collect. Motschulsky”).
Thea quadripunctata: Mulsant 1866: 148; Crotch 1874: 134; Korschefsky 1932: 560.
Protothea quadripunctata: Mader 1933: 287; Iablokoff-Khnzorian 1982: 542; Poorani & Ślipiński 2005: 329.
Protothea indica Weise, 1910: 44 (Type locality: Sikkim, India).— Korschefsky 1932: 570. Synonymized by Mader 1933: 287.
Nedina mirabilis Hoang, 1984: 68.—Synonymized by Poorani & Ślipiński 2005: 329.
Diagnosis. Length: 2.85–3.25 mm; width: 2.45–2.70 mm. Form short oval, dorsum moderately convex and glabrous except head pubescent with silvery white hairs. Ground colour of dorsal side bright yellow, head and pronotum creamy yellow, pronotum with a roughly M-shaped, indistinct pale brown marking in the middle, anterior and lateral margins transparent; each elytron with four black spots in the nominate form (Fig. 182b), spots fused to form larger maculae (Fig. 182c, d) or totally absent (Fig. 182a); elytral margins transparent. Ventral side yellow except mesepimeron creamy yellow, prosternal intercoxal process, mesoventral process, metaventrite, and median portion of abdominal ventrites 1 and 2 dark pitchy brown to black; prosternal intercoxal process occasionally paler in anterior half, luteous to reddish brown, with only apical and lateral borders dark pitchy brown to black. Prosternal intercoxal process (Fig. 181e) prominent, pyriform with long white hairs and a pair of marginal carinae. Male genitalia (Fig. 181k–m) and spermatheca (Fig. 181j) as illustrated.
Distribution. India: North-eastern region (Assam, Nagaland, Sikkim); Vietnam; Thailand; Myanmar.
Prey / associated habitat. Collected in association with Ceratovacuna lanigera Zehntner (Hemiptera: Aphididae: Hormaphidinae) on sugarcane (label data).
Seasonal occurrence. Collected during November–December and February (label data).
Note. See Poorani & Ślipiński (2005) for detailed description with illustrations.
description: Published as part of POORANI, J., 2023, An illustrated guide to lady beetles (Coleoptera: Coccinellidae) of the Indian Subcontinent. Part 1. Tribe Coccinellini, pp. 1-307 in Zootaxa 5332 (1) on pages 253-255, DOI: 10.11646/zootaxa.5332.1.1, http://zenodo.org/record/8261502
Conocimiento y aceptación de leche genéticamente modificada en consumidores de la Región del Maule, Chile
Creators: name: Schnettler, Berta
name: Sepulveda, Oriana
name: Ruiz, Danilo
name: Catalan, Patricia
name: Sepulveda, Nestor
name: Schnettler, Berta
name: Sepulveda, Oriana
name: Ruiz, Danilo
name: Catalan, Patricia
name: Sepulveda, Nestor
Publisher: name: Unknown
Year: 2008
Subjects: subject: Consumer/Household Economics
subject: Food Consumption/Nutrition/Food Safety
subject: genetically modified foods
subject: conjoint analysis
subject: cluster analysis
subject: fluid milk.

description: Considering the debate created by genetically modified foods (GMF) in developed countries, the importance of this variable in the decision to purchase milk of consumers in Talca (Maule Region, Chile) and the existence of different market segments was determined via a survey of 400 people. Using a conjoint analysis, it was determined that, in general, the presence of genetically modified foods was more important than the brand or the price. Using a cluster analysis, three segments were distinguished: the largest segments (38.0%) placed greater importance on the manner of food production and preferred milk with no genetic manipulation. The second group (30.5%) also placed greater importance on the manner of food production, but preferred transgenic milk. The third segment (25.8%) placed great importance on brand and preferred genetically modified milk. The three segments rejected store brand products and preferred national brand milk.
description: Published by Asociación de Economistas Agrarios de Chile
One-dimensional density waves of ultracold bosons in an optical lattice
Creators: name: Kollath, C.
name: Schollwöck, U.
name: von Delft, J.
name: Zwerger, W.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We investigate the propagation of density-wave packets in a Bose-Hubbard model using the adaptive time-dependent density-matrix renormalization group method. We discuss the decay of the amplitude with time and the dependence of the velocity on density, interaction strength and the height of the perturbation in a numerically exact way, covering arbitrary interactions and amplitudes of the perturbation. In addition, we investigate the effect of self-steepening due to the amplitude dependence of the velocity and discuss the possibilities for an experimental detection of the moving wave packet in time of flight pictures. By comparing the sound velocity to theoretical predictions, we determine the limits of a Gross-Pitaevskii or Bogoliubov type description and the regime where repulsive one-dimensional Bose gases exhibit fermionic behaviour.
Competition in Electric Autonomous Mobility on Demand Systems
Creators: name: Turan, Berkay
name: Alizadeh, Mahnoosh
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optimization and Control (math.OC)
subject: Systems and Control (eess.SY)
subject: FOS: Mathematics
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper investigates the impacts of competition in autonomous mobility-on-demand systems. By adopting a network-flow based formulation, we first determine the optimal strategies of profit-maximizing platform operators in monopoly and duopoly markets, including the optimal prices of rides. Furthermore, we characterize the platform operator's profits and the consumer surplus. We show that for the duopoly, the equilibrium prices for rides have to be symmetric between the firms. Then, in order to study the benefits of introducing competition in the market, we derive universal theoretical bounds on the ratio of prices for rides, aggregate demand served, profits of the firms, and consumer surplus between the monopolistic and the duopolistic setting. We discuss how consumers' firm loyalty affects each of the aforementioned metrics. Finally, using the Manhattan network and demand data, we quantify the efficacy of static pricing and routing policies and compare it to real-time model predictive policies.
description: 19 pages, 5 figures
Additional file 2 of Management of decision of withholding and withdrawing life-sustaining treatments in French EDs
Creators: name: Douplat, Marion
name: Fraticelli, Laurie
name: Claustre, Clement
name: Peiretti, Alexandra
name: Serre, Patrice
name: Bischoff, Magali
name: Jacquin, Laurent
name: Freyssenge, Julie
name: Schott, Anne-Marie
name: Tazarourte, Karim
name: Frugier, Soizic
name: Khoury, Carlos E. L.
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Science Policy

description: Additional file 2. Survey on the management of the decision of withholding and withdrawing life sustaining treatments in emergency departments.
Additional file 1 of Management of decision of withholding and withdrawing life-sustaining treatments in French EDs
Creators: name: Douplat, Marion
name: Fraticelli, Laurie
name: Claustre, Clement
name: Peiretti, Alexandra
name: Serre, Patrice
name: Bischoff, Magali
name: Jacquin, Laurent
name: Freyssenge, Julie
name: Schott, Anne-Marie
name: Tazarourte, Karim
name: Frugier, Soizic
name: Khoury, Carlos E. L.
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Science Policy

description: Additional file 1: Table S1. Evaluation criteria for the retrospective audit.
Caracterización de los pequeños ganaderos ovinos del secano costero de la Región de O’Higgins para su potencial inserción en la cadena exportadora de carne ovina
Creators: name: Saez, Luis
name: Caceres, Leonardo
name: Leporati, Michel
name: Saez, Luis
name: Caceres, Leonardo
name: Leporati, Michel
Publisher: name: Unknown
Year: 2008
Subjects: subject: Agribusiness
subject: Livestock Production/Industries
subject: Characterization
subject: Quality
subject: Small-livestock producers

description: In the year 2004, the Agricultural and Livestock Service (SAG) standardized the regulations for those farms that want to be part of exporting process of livestock products of ovine origin, these regulations are part of the ovine’s livestock production program under official certification (PABCO ovino). The aim of this study is to characterize small-livestock sheep producers in a dryland coastal area in the O’Higgins Region, with the intention of characterizing their fulfilment of the quality protocol, thus establishing their capacity of being part of the ovine meat's exporting chain. Three groups were identified. One of them could soon be part of the exporting chain, because it presents the highest fulfilment levels related to PABCO ovino. Nevertheless, it needs to develop an intervention program in order to reach the minimum incorporation level to PABCO program.
description: Published by Asociación de Economistas Agrarios de Chile
Smeared D0 charge and the Gubser-Mitra conjecture
Creators: name: Ross, Simon F.
name: Wiseman, Toby
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We relate a Dp or NS-brane with D0-brane charge smeared over its worldvolume to the system with no D0-charge. This allows us to generalise Reall's partial proof of the Gubser-Mitra conjecture. We show explicitly for specific examples that the dynamical instability coincides with thermodynamic instability in the ensemble where the D0-brane charge can vary. We also comment on consistency checks of the conjecture for more complicated systems, using the example of the D4 with F1 and D0 charges smeared on its worldvolume.
description: 16 pages, 1 figure, v2: small error corrected
Determinantes de la elección de participación e ingresos en diferentes categorías de empleo en sectores rurales de Chile
Creators: name: Rodriguez, C.
name: Lopez De Lerida, J.
name: Rodriguez, C.
name: Lopez De Lerida, J.
Publisher: name: Unknown
Year: 2008
Subjects: subject: Community/Rural/Urban Development
subject: labor market
subject: multivariate probit
subject: rural nonfarm employment

description: This paper analyzes the labor market in rural areas of Chile. The methodology models labor participation decisions in seven employment categories, and estimates the determinants of income levels. It is found that asset endowment, economic connectivity and a favorable macroeconomic context influence the dynamism of rural labor markets, decreasing the relative distances and the capability to overcome entry barriers to higher salary jobs. It is proposed that rural policies should promote investments in education and road infrastructure, and consider the dynamism of the labor market in the non agricultural sector as well as in the agricultural sector.
description: Published by Asociación de Economistas Agrarios de Chile
On $A_{n-1}^{(1)},B_{n}^{(1)}, C_{n}^{(1)}, D_{n}^{(1)},A_{2n}^{(2)}, A_{2n-1}^{(2)}$ and $D_{n+1}^{(2)}$ Reflection $K$-Matrices
Creators: name: Malara, R.
name: Lima-Santos, A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present the classification of the most general regular solutions to the boundary Yang-Baxter equations for vertex models associated with non-exceptional affine Lie algebras. Reduced solutions found by applying a limit procedure to the general solutions are discussed. We also present the list of diagonal $K$-matrices. Special cases are considered separately.
description: 58 pages, revised version, references added, LaTex
Investigating the role of EML2 and EML4 alternative splicing in microtubule remodelling and neuronal cell differentiation
Creators: name: Marasi, Venus
Publisher: name: University of Leicester
Year: 2024
Subjects: Uncategorized

description: Neurons are highly complex differentiated cells that lie at the heart of the nervous system. Generation of elongated axons and dendrites during neuronal cell differentiation is dependent on organization and dynamics of the microtubule network. Yet our understanding of how microtubules are remodelled during this process is far from complete. EMLs are a family of microtubule-associated proteins highly expressed in neuronal cells. Humans express six EML proteins, with EML1 to EML4 being structurally similar, containing an N-terminal region that binds to polymerized microtubules and a C-terminal region that binds to soluble tubulin heterodimers. Contrasting evidence suggests that some EML proteins stabilize microtubules, whereas others destabilize them. Moreover, mutations in EML1 are responsible for neuronal heterotopia, a defect in neuronal cell migration.
Previous studies in our lab have shown that EML4 recruits the NEK9 and NEK7 kinases to microtubules, while NEK6 and NEK7 phosphorylate the N-terminus of EML4 resulting in its detachment from microtubules. Database analysis revealed that EMLs are subject to alternative splicing in their N-terminal regions, leading to the production of one long (L) variant that contains a complete N-terminus as well as the C-terminus, and possibly several short (S) variants that differ in the amount of N-terminus. In this project, we explored the expression and localization of the long and one of the short splice variants of EML4 and EML2, as well as NEK6 and NEK7, during differentiation of SH-SY5Y neuronal cells. We also tested the consequences of overexpression and depletion of these EML proteins on neurite outgrowth and branching before and after differentiation.
We found that differentiation led to decreased expression of the EML4-L variant, whereas the EML4-S variant remained relatively constant. In contrast, the EML2-L variant increased in expression, while EML2-S decreased in expression. Overexpression of EML2-L and EML2-S led to increased and decreased neurite lengths, respectively. Interestingly, neurite branching increased in EML2-S transfected cells. Using localization approaches, we found that EML2-L but not EML2-S localized strongly to interphase microtubules. However, the EML4-S variant stabilized microtubules less effectively than EML4-L. Depletion of both EML4 and EML2 led to neurite outgrowth. We propose that the presence of the N-terminal microtubule-binding region present in the long variants of EML2 and EML4 promotes stabilization of microtubules and neurite extension. However, the short variants might promote neurite branching. Together, these data suggest that regulated expression and localization of different splice variants of EML proteins are crucial to the remodelling of microtubules that occurs during neuronal differentiation.
Factores de éxito en el cumplimiento de obligaciones crediticias de pequeños agricultores de la Región de O’Higgins, Chile
Creators: name: Reyes, Alvaro
name: Ibarra, Patricio
name: Reyes, Alvaro
name: Ibarra, Patricio
Publisher: name: Unknown
Year: 2009
Subjects: subject: Community/Rural/Urban Development
subject: credit
subject: small-scale farmers
subject: Chile.

description: In Chile, the small-scale farmer sector has more than 1.2 millions of peasants with more than 278 thousand productive farms which represent 85% of total productive farms in Chile. This sector is considered to be heterogeneous and multifunctional. As other farming sectors, small-scale farmers need smooth access to credit to support working capital and investment. However, these kinds of farmers do not meet the requirements of commercial banks due to asymmetric information. The objective of this paper is to determine farmer characteristics that affect the payment of credit obligations. This case-study analysis is based on a cross-section survey data taken of 185 small-scale farmers in O’Higgins Region in Chile, who applied for a commercial bank loan during two seasons. An ordered probit regression model is estimated. The results suggest that the variables that reduce the probability of credit repayment are total production cost and crop specialization. On the other hand, education and farm location did not present statistically significant differences.
description: Published by Asociación de Economistas Agrarios de Chile
Psyllobora Chevrolat
Creators: name: POORANI, J.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Coccinellidae
Psyllobora

description: Genus Psyllobora Chevrolat
Psyllobora Chevrolat, in Dejean, 1836: 434.
Type species: Coccinella lineola Fabricius, 1792, by subsequent designation of Timberlake 1943.
Thea Mulsant, 1846: 159. Type species: Coccinella vigintiduopunctata Linnaeus, 1758, by subsequent designation of Crotch 1874.
Diagnosis. Form small, dorsum broad oval to elongate oval, glabrous; coloration ivory to pale yellow with dark brown / black markings. Head pubescent, clypeal margin without lateral projections; almost fully retracted into pronotum at rest. Antenna (Fig. 183b) with 11 elongate and loosely jointed antennomeres, first antennomere enlarged and somewhat flattened. Terminal maxillary palpomere (Fig. 183e) securiform. Mandible (Fig. 183c) with ventral tooth having a series of small serrations. Anterior margin of pronotum shallowly emarginate, covering only posterior half of eyes. Lateral margins of pronotum and elytra explanate, transparent. Prosternal intercoxal process flat, feebly ridged laterally and truncate apically. Abdominal postcoxal line (Fig. 183f) incomplete, short. Female genitalia with infundibulum.
Distribution. Palaearctic, Oriental, Afrotropical, Neotropical and Nearctic regions.
Affinities. Tomaszewska et al. (2021) included it under the Synonycha -group of genera and recovered it in a major branch comprising all the genera of the former tribe Halyziini.
Included species. Psyllobora bisoctonotata (Mulsant) is the only Indian representative of this genus and is widely distributed in the northern and northwestern states of India and Pakistan.
description: Published as part of POORANI, J., 2023, An illustrated guide to lady beetles (Coleoptera: Coccinellidae) of the Indian Subcontinent. Part 1. Tribe Coccinellini, pp. 1-307 in Zootaxa 5332 (1) on page 256, DOI: 10.11646/zootaxa.5332.1.1, http://zenodo.org/record/8261502
Parton intrinsic motion: suppression of the Collins mechanism for transverse single spin asymmetries in p(transv. polarised) p --> pion + X
Creators: name: Anselmino, M.
name: Boglione, M.
name: D'Alesio, U.
name: Leader, E.
name: Murgia, F.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider a general formalism to compute inclusive polarised and unpolarised cross sections within pQCD and the factorisation scheme, taking into account parton intrinsic motion in distribution and fragmentation functions, as well as in the elementary dynamics. Surprisingly, the intrinsic partonic motion, with all the correct azimuthal angular dependences, produces a strong suppression of the transverse single spin asymmetry arising from the Collins mechanism. As a consequence, and in contradiction with earlier claims, the Collins mechanism is unable to explain the large asymmetries found in p(transv. polarised) p --> pion + X at moderate to large Feynman x_F. The Sivers effect is not suppressed.
description: LaTeX, 21+1 pages, 1 ps figure
Factores que determinan la presencia de problemas entre productores de fruta fresca y empresas exportadoras, en la Zona Central de Chile
Creators: name: Avendano, Daniela
name: Reyes, Alvaro
name: Avendano, Daniela
name: Reyes, Alvaro
Publisher: name: Unknown
Year: 2009
Subjects: subject: Crop Production/Industries
subject: Industrial Organization
subject: supply chain
subject: contract theory
subject: fruit growers
subject: Chile.

description: The main aim of this research is to identify the factors that affect the commercial relation between fruit growers and export companies. The analysis is based on a cross-section survey data of 206 medium-scale farmers. The fi eldwork was carried out in the central regions of Chile, the heart of the fruit and vegetable production areas. This analysis is done by econometric estimation of logistic regression model. The results indicate that there is not suffi cient motives to state that there exists some problems between fruit growers and export companies. We conclude that the factors that increase the probability of having problems with the export companies are: infrastructure, long-term debt and credit constraints. On the other hand, the factor that reduces the probability of having problems is the number of hectares.
description: Published by Asociación de Economistas Agrarios de Chile
C18O, 13CO, and 12CO abundances and excitation temperatures in the Orion B molecular cloud: An analysis of the precision achievable when modeling spectral line within the Local Thermodynamic Equilibrium approximation
Creators: name: Roueff, Antoine
name: Gerin, Maryvonne
name: Gratier, Pierre
name: Levrier, Francois
name: Pety, Jerome
name: Gaudel, Mathilde
name: Goicoechea, Javier R.
name: Orkisz, Jan H.
name: Magalhaes, Victor de Souza
name: Vono, Maxime
name: Bardeau, Sebastien
name: Bron, Emeric
name: Chanussot, Jocelyn
name: Chainais, Pierre
name: Guzman, Viviana V.
name: Hughes, Annie
name: Kainulainen, Jouni
name: Languignon, David
name: Bourlot, Jacques Le
name: Petit, Franck Le
name: Liszt, Harvey S.
name: Marchal, Antoine
name: Miville-Deschenes, Marc-Antoine
name: Peretto, Nicolas
name: Roueff, Evelyne
name: Sievers, Albrecht
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: CO isotopologue transitions are routinely observed in molecular clouds to probe the column density of the gas, the elemental ratios of carbon and oxygen, and to trace the kinematics of the environment. We aim at estimating the abundances, excitation temperatures, velocity field and velocity dispersions of the three main CO isotopologues towards a subset of the Orion B molecular cloud. We use the Cramer Rao Bound (CRB) technique to analyze and estimate the precision of the physical parameters in the framework of local-thermodynamic-equilibrium excitation and radiative transfer with an additive white Gaussian noise. We propose a maximum likelihood estimator to infer the physical conditions from the 1-0 and 2-1 transitions of CO isotopologues. Simulations show that this estimator is unbiased and efficient for a common range of excitation temperatures and column densities (Tex > 6 K, N > 1e14 - 1e15 cm-2). Contrary to the general assumptions, the different CO isotopologues have distinct excitation temperatures, and the line intensity ratios between different isotopologues do not accurately reflect the column density ratios. We find mean fractional abundances that are consistent with previous determinations towards other molecular clouds. However, significant local deviations are inferred, not only in regions exposed to UV radiation field but also in shielded regions. These deviations result from the competition between selective photodissociation, chemical fractionation, and depletion on grain surfaces. We observe that the velocity dispersion of the C18O emission is 10% smaller than that of 13CO. The substantial gain resulting from the simultaneous analysis of two different rotational transitions of the same species is rigorously quantified. The CRB technique is a promising avenue for analyzing the estimation of physical parameters from the fit of spectral lines.
description: 27 pages, 23 PDF figures. Accepted for publication in A&A. Uses aa latex macro
A simulation framework for the design and evaluation of computational cameras
Creators: name: Nürnberg, Thomas
name: Schambach, Maximilian
name: Uhlig, David
name: Heizmann, Michael
name: Puente León, Fernando
Publisher: name: Society of Photo-optical Instrumentation Engineers (SPIE)
Year: 2019
Subjects: Computational cameras
raytracing
simulation
evaluation

description: In the emerging field of computational imaging, rapid prototyping of new camera concepts becomes increasingly difficult since the signal processing is intertwined with the physical design of a camera. As novel computational cameras capture information other than the traditional two-dimensional information, ground truth data, which can be used to thoroughly benchmark a new system design, is also hard to acquire. We propose to bridge this gap by using simulation. In this article, we present a raytracing framework tailored for the design and evaluation of computational imaging systems. We show that, depending on the application, the image formation on a sensor and phenomena like image noise have to be simulated accurately in order to achieve meaningful results while other aspects, such as photorealistic scene modeling, can be omitted. Therefore, we focus on accurately simulating the mandatory components of computational cameras, namely apertures, lenses, spectral filters and sensors. Besides the simulation of the imaging process, the framework is capable of generating various ground truth data, which can be used to evaluate and optimize the performance of a particular imaging system. Due to its modularity, it is easy to further extend the framework to the needs of other fields of application. We make the source code of our simulation framework publicly available and encourage other researchers to use it to design and evaluate their own camera designs.
Additional file 1 of Differential long-term retention of biological disease-modifying antirheumatic drugs in patients with rheumatoid arthritis by age group from the FIRST registry
Creators: name: Kawabe, Akio
name: Nakano, Kazuhisa
name: Kubo, Satoshi
name: Asakawa, Takeshi
name: Tanaka, Yoshiya
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Biotechnology
subject: Ecology
subject: FOS: Biological sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: Science Policy

description: Additional file 1: Table S1. Baseline characteristics of patients aged <65 years treated with bDMARDs. Table S2. Baseline characteristics of patients aged 65–74 years treated with bDMARDs. Table S3. Baseline characteristics of patients aged ≥75 years treated with bDMARDs. Table S4. Risk factors for the discontinuation of bDMARDs in all patients. Table S5. The generalized propensity score model in all patients. Table S6. Adverse events responsible for the discontinuation of bDMARDs in non-adjusted data. Table S7. Baseline characteristics of bDMARD groups after excluding patients who discontinued treatment because of remission. Table S8. Baseline characteristics of patients <65 years of age treated with bDMARDs after excluding patients who discontinued treatment because of remission. Table S9. Baseline characteristics of patients 65–74 years of age treated with bDMARDs after excluding patients who discontinued treatment because of remission. Table S10. Baseline characteristics of patients ≥75 years of age treated with bDMARDs after excluding patients who discontinued treatment because of remission. Table S11. Assessment of the generalized propensity score model after excluding patients who discontinued treatment because of remission. Figure S1. Flow chart of patient recruitment. Figure S2. Three-year retention rates of bDMARDs in non-adjusted data. Figure S3. Three-year retention rates of bDMARDs in adjusted data using inverse probability of treatment weighting after excluding patients who discontinued treatment because of remission. Figure S4. Changes in CDAI in non-adjusted data.
Factores que influyen en el precio del kiwi chileno en los mercados de exportación: Un estudio de caso
Creators: name: Troncoso, Javier L.
name: Aguirre, Medardo
name: Abad, Javiera
name: Troncoso, Javier L.
name: Aguirre, Medardo
name: Abad, Javiera
Publisher: name: Unknown
Year: 2009
Subjects: subject: Agribusiness
subject: hedonic prices
subject: marginal price
subject: percent impact.

description: The main suppliers of Kiwi to the international markets are New Zealand, Italy and Chile. Chile is the third major producer of this fruit crop, with over 8,000 hectares distributed from the V to the VIII region of the country. Total production is about 150 thousand tons, of which 80% are destined to the export markets; the main destinations of this fruit are Europe, North and Latin America. In 2007 exports amounted to 143 million dollars, 5.4% of the value of fruit exports of that year (US$MM 2,260.3). This investigation aims to determine the factors that infl uence the price of kiwi in the international markets. With this purpose 1,490 export bulletins obtained at the export company Subsole were analyzed. This is an important company, as it sold between 27 and 48% of all the Chilean kiwi exported in the period 2005 to 2007. A log-linear hedonic price model was fi tted to the data, employing Weighted Least Squares. The variables of the model were: size, fruit type, month of marketing, destination market and year of export. The following conclusions were drawn from the study: (a) the variable with the highest impact on price is the type of fruit, followed by marketing month, destination port and, in the last place, size; (b) ellipsoidal fruits are preferred to fl at fruits; (c) March is the most convenient marketing month, as the price diminishes in the following months; (d) the Far and Middle East countries are the most interesting markets, followed by Latin America and, in the last places, Europe and the United States; (e) size has a very mild infl uence on price, being punished the price of small sizes and vice versa.
description: Published by Asociación de Economistas Agrarios de Chile
Asymptotic fluctuations of geometric q-TASEP, geometric q-PushTASEP and q-PushASEP
Creators: name: Vető, Bálint
Publisher: name: arXiv
Year: 2021
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60K35, 60B20

description: We investigate the asymptotic fluctuation of three interacting particle systems: the geometric q-TASEP, the geometric q-PushTASEP and the q-PushASEP. We prove that the rescaled particle position converges to the GUE Tracy-Widom distribution in the homogeneous case. If the jump rates of the first finitely many particles are perturbed in the first two models, we obtain that the limiting fluctuations are governed by the Baik-Ben Arous-Peche distribution and that of the top eigenvalue of finite GUE matrices.
description: 40 pages, 2 figures
The locality problem for two tastes of staggered fermions
Creators: name: Bunk, B.
name: Della Morte, M.
name: Jansen, K.
name: Knechtli, F.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We address the locality problem arising in simulations, which take the square root of the staggered fermion determinant as a Boltzmann weight to reduce the number of dynamical quark tastes from four to two. We study analytically and numerically the square root of the staggered fermion operator as a candidate to define a two taste theory from first principles. Although it has the correct weight, this operator is non-local in the continuum limit. Our work serves as a warning that fundamental properties of field theories might be violated when employing blindly the square root trick. The question, whether a local operator reproducing the square root of the staggered fermion determinant exists, is left open.
description: Talk presented at Lattice2004(theory), Fermilab, June 21-26, 2004
Topological Gaps by Twisting
Creators: name: Rosa, Matheus
name: Ruzzene, Massimo
name: Prodan, Emil
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: It is shown that twisted $n$-layers have an intrinsic degree of freedom living on $2n$-tori, which is the phason supplied by the relative slidings of the layers and that the twist generates pseudo magnetic fields. As a result, twisted $n$-layers host intrinsic higher dimensional topological phases and those characterized by second Chern numbers can be found in a twisted bi-layer. Indeed, our investigation of phononic lattices with interactions modulated by a second twisted lattice reveals Hofstadter-like spectral butterflies in terms of the twist angle, whose gaps carry the predicted topological invariants. Our work demonstrates how multi-layered systems are virtual laboratories for studying the physics of higher dimensional quantum Hall effect and how to generate topological edge chiral modes by simply sliding the layers relative to each other. In the context of classical metamaterials, both photonic and phononic, these findings open a path to engineering topological pumping via simple twisting and sliding.
Quantization of Neveu-Schwarz-Ramond Superstring Model in 10+2-dimensional Spacetime
Creators: name: Tsukioka, Takuya
name: Watabiki, Yoshiyuki
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We construct a Neveu-Schwarz-Ramond superstring model which is invariant under supersymmetric U(1)_V * U(1)_A gauge transformations as well as the super-general coordinate, the super local Lorentz and the super-Weyl transformations on the string world-sheet. We quantize the superstring model by covariant BRST formulation a la Batalin and Vilkovisky and noncovariant light-cone gauge formulation. Upon the quantizations the model turns out to be formulated consistently in 10+2-dimensional background spacetime involving two time dimensions.
description: 1+61 pages, no figures, LaTeX
Highly-efficient generation of coherent light at 2128 nm via degenerate optical-parametric oscillation
Creators: name: Darsow-Fromm, Christian
name: Schröder, Maik
name: Gurs, Julian
name: Schnabel, Roman
name: Steinlechner, Sebastian
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Cryogenic operation in conjunction with new test-mass materials promises to reduce the sensitivity limitations from thermal noise in gravitational-wave detectors. The currently most advanced materials under discussion are crystalline silicon as a substrate with amorphous silicon-based coatings. They require, however, operational wavelengths around 2 $\mathrmμ$m to avoid laser absorption. Here, we present a light source at 2128 nm based on a degenerate optical parametric oscillator (DOPO) to convert light from a 1064 nm non-planar ring-oscillator (NPRO). We achieve an external conversion efficiency of $(88.3\,\pm\,1.4)\,\%$ at a pump power of 52 mW in PPKTP (periodically-poled potassium titanyl phosphate, internal efficiency was 94 %), from which we infer an effective non-linearity of $(4.75\,\pm\,0.18)\,\mathrm{pm/V}$. With our approach, light from the established and existing laser sources can be efficiently converted to the 2 $\mathrmμ$m regime, while retaining the excellent stability properties.
description: To be published in Optics Letters
Modelo analítico jerárquico para la priorización de humedales según riesgo de ingreso de infl uenza aviar
Creators: name: Kobrich, Claus
name: Maino, Mario
name: Aguilar, Fernando
name: Kobrich, Claus
name: Maino, Mario
name: Aguilar, Fernando
Publisher: name: Unknown
Year: 2009
Subjects: subject: Livestock Production/Industries
subject: AHP model
subject: wetlands
subject: avian infl uenza.

description: Avian infl uenza has led to serious social, political and commercial problems. To keep countries free from this disease, it is of great importance to focus surveillance and early warning programs at points of higher entry and spread risk. One is the arrival of infected migratory birds and the subsequent virus transfer to nearby production systems. In the case of Chile, 32 wetlands were identifi ed, in which this situation occurs. This work uses the analytic hierarchy process (AHP) to obtain a ranking of these wetlands. To that end, a panel of experts identifi ed risk factors, which were subsequently evaluated using agricultural census data. The obtained ranking showed that the wetlands of Lake Budi, the mouth of River Maipo and the El Yali wetland, had the highest risk scores. Sensitivity analysis showed that the model was robust to changes in priorities of the decision model.
description: Published by Asociación de Economistas Agrarios de Chile
Data quality and outcomes analysis on administrative health data
Creators: name: Anderson, Marianne
Publisher: name: University of British Columbia
Year: 2009

description: Administrative data are collected operationally on functional units through the process of normal business operations. In the case of health organisations, administrative data can include record-level patient demographics such as age and other physical characteristics, injury and treatment dates, codes, and their associated descriptions, as well as treatment fees and other costs. Outcomes research on such data may allow businesses to identify best practices, and to reduce costs by using existing demographic, injury and treatment data as predictors. The impact of poor data quality on an attempt to perform outcomes analysis uncovered the need to examine and address data quality issues and their impact on decision-making and research applications. To demonstrate the effective use of administrative and outcome-measurement data, a custom-application database was constructed and populated with existing (paper) records and with new administrative and outcome data for a pain treatment called Pulsed Signal Therapy. These data were massaged into a form that would allow for statistical analysis and possibly the identification of factors and trends that could expedite experimental design to test any hypotheses which may arise. Analysis of these data indicates that while the initial scores are consistently strong predictors across all measures of outcome, differences between groups appear over time immediately after treatment. Although it appears that older people are more likely to see an improvement than younger clients, age group and injury type are strongly associated. For Pain Frequency, we see not only a main effect based on the age of injury, but an apparent interaction between the age of the injury and the initial Pain Frequency score. Although data at the low end of initial scores are sparse, at the higher end, older injuries are less likely to see an improvement than more recent injuries. Finally, Restriction of Movement at one year post-treatment shows us that patients in the older age group are less likely to see an improvement from baseline Restriction of Movement. Although these are not experimental data, the trends identified through this type of analysis may be useful in guiding experimental design for hypothesis testing.
Intrinsic Redshifts and the Tully-Fisher Distance Scale
Creators: name: Russell, David G.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The Tully-Fisher relationship (TFR) has been shown to have a relatively small observed scatter of ~ +/-0.35 mag implying an intrinsic scatter < +/-0.30 mag. However, when the TFR is calibrated from distances derived from the Hubble relation for field galaxies scatter is consistently found to be +/-0.64 to +/-0.84 mag. This significantly larger scatter requires that intrinsic TFR scatter is actually much larger than +/-0.30 mag, that field galaxies have an intrinsic TFR scatter much larger than cluster spirals, or that field galaxies have a velocity dispersion relative to the Hubble flow in excess of 1000 km s-1. Each of these potential explanations faces difficulties contradicted by available data and the results of previous studies. An alternative explanation is that the measured redshifts of galaxies are composed of a cosmological redshift component predicted from the value of the Hubble Constant and a superimposed intrinsic redshift component previously identified in other studies. This intrinsic redshift component may exceed 5000 km s-1 in individual galaxies. In this alternative scenario a possible value for the Hubble Constant is 55-60 km s-1 Mpc-1.
description: 15 pages, Astrophysics&Space Science - Accepted for publication
Direct Marketing Local Food to Chefs: Chef Preferences and Perceived Obstacles
Creators: name: Curtis, Kynda R.
name: Cowee, Margaret W.
name: Curtis, Kynda R.
name: Cowee, Margaret W.
Publisher: name: Unknown
Year: 2009
Subjects: subject: Agribusiness
subject: Marketing
subject: FOS: Economics and business

description: Increasing consumer preferences for locally produced foods, exhibited by the nationwide expansion of farmers markets, is likely to affect food-service establishments. This study used a mail and telephone survey to evaluate chefs’ preferences and attitudes towards purchasing locally produced foods for their restaurants. Results show that chefs are most concerned with food quality, taste, and freshness. Chefs of small gourmet, independently owned restaurants are more likely to purchase local foods. Gourmet chefs are more concerned with food-production practices and thus see the value of purchasing local foods. Lack of information was found to be the largest hurdle to purchasing local products, clearly demonstrating the need for additional information and product samples from local producers.