A note on comonotonicity and positivity of the control components of decoupled quadratic FBSDE

In this small note we are concerned with the solution of Forward-Backward Stochastic Differential Equations (FBSDE) with drivers that grow quadratically in the control component (quadratic growth FBSDE or qgFBSDE). The main theorem is a comparison result that allows comparing componentwise the signs of the control processes of two different qgFBSDE. As a byproduct one obtains conditions that allow establishing the positivity of the control process.Comment: accepted for publicatio

Tutoria adap tativa com base no contexto dos estudantes em ambientes de ap rendizagem mediados por tecnologia

A context model for a pedagogical scenario explains its users (teachers, designers, and software developers) how a Technology Enhanced Learning (TEL) environment will support an educational process so that its structure should express as clearly as possible all elements which compose it (at both of educational and software design levels) and their relationships and should allow making analysis of its behaviour for its future improvement. By means of this work the definition of a context modeling process for adapting tutorship acting during a learning activity in TEL environments is done. The solution will influence the auto regulation of teachers/instructors/ tutors/trainers’ acts concerning adaptive students’ guidance and assistance and also the maintenance and upgrading of teaching strategies/abilities and learning objectsUn modelo de contexto para un escenario pedagógico explica a sus usuarios (profesores, diseñadores y desarrolladores de software) la manera como un entorno de aprendizaje basado en tecnología llevará a cabo el proceso educativo. Por lo tanto, su estructura deberá expresar lo más claramente posible todos los elementos que lo componen (tanto en el nivel educativo como en la fase de diseño del software) y sus interrelaciones, y deberá permitir realizar análisis de su comportamiento para su futuro mejoramiento. Este trabajo define un proceso de modelado del contexto para adaptar acciones tutoriales llevadas a cabo en actividades de aprendizaje mediadas por tecnología y para influenciar la autorregulación de dichas acciones en lo relacionado con la asistencia y monitorización personalizada de las necesidades de los estudiantes frente a la temática específica tratada y el mantenimiento y actualización de las estrategias de enseñanza/aprendizaje y de los objetos de aprendizaje (contenidos).Um modelo de contexto para um cenário pedagógico explica a seus usuários (professores, designers e desenvolvedores de software) a forma como um ambiente de aprendizagem baseado em tecnologia irá realizar o processo educacional. Portanto, sua estrutura deverá expressar com a maior clareza possível todos os elementos que o compõem (tanto a nível educacional quanto na fase do design de software) e suas interrelações, e deverá permitir a análise de seu comportamento para seu melhoramento futuro. Este trabalho define um processo de modelagem do contexto para adequar as ações de tutoria implementadas em atividades de aprendizagem mediadas por tecnologia e para influenciar a auto-regulação de tais ações naquilo que se relaciona com a assistência e monitorização personalizada das necessidades dos estudantes perante a questão específica tratada e a manutenção e atualização das estratégias de ensino / aprendizagem e dos objetos de aprendizagem (conteúdos)

Pliocene sigmodontine rodents (Mammalia: Cricetidae) in northernmost South America: test of biogeographic hypotheses and revised evolutionary scenarios

We document the first occurrence of Sigmodontinae (Mammalia, Rodentia, Cricetidae) from the Pliocene of northern South America, from the San Gregorio Formation of northwestern Venezuela. The recovered isolated molars are identified as Oligoryzomys sp. and Zygodontomys sp., two currently widespread sigmodontines in South America. These records constitute the oldest representatives of these genera, potentially new species, and the first Pliocene occurrence for Oryzomyini and the whole subfamily outside Argentina. Hypotheses on the historical biogeography of sigmodontines have been constructed almost exclusively using genetic data and the fossils we report provide a new kind of evidence. The occurrence of Oligoryzomys sp. and Zygodontomys sp. in Venezuela provides novel information for the diversification models suggested for Oligoryzomys, by supporting a potential eastern corridor of open environments from northern to southern South America. The presence of sigmodontines from the locality home of the new reports, Norte Casa Chiguaje, is consistent with the palaeoenvironmental conditions originally proposed for it based on mammals and botanical records, being characterized as mixed open grassland/forest areas surrounding permanent freshwater systems. The new sigmodontine evidence is used to discuss the putative scenarios of the ancient evolution of the subfamily in South America, favouring a model in which open areas (savannahs) to the east of the Andes played crucial role aiding or obstructing Late Miocene-Pliocene sigmodontine dispersion southwards

Pliocene sigmodontine rodents (Mammalia: Cricetidae) in northernmost South America: test of biogeographic hypotheses and revised evolutionary scenarios

We document the first occurrence of Sigmodontinae (Mammalia, Rodentia, Cricetidae) from the Pliocene of northern South America, from the San Gregorio Formation of northwestern Venezuela. The recovered isolated molars are identified as Oligoryzomys sp. and Zygodontomys sp., two currently widespread sigmodontines in South America. These records constitute the oldest representatives of these genera, potentially new species, and the first Pliocene occurrence for Oryzomyini and the whole subfamily outside Argentina. Hypotheses on the historical biogeography of sigmodontines have been constructed almost exclusively using genetic data and the fossils we report provide a new kind of evidence. The occurrence of Oligoryzomys sp. and Zygodontomys sp. in Venezuela provides novel information for the diversification models suggested for Oligoryzomys, by supporting a potential eastern corridor of open environments from northern to southern South America. The presence of sigmodontines from the locality home of the new reports, Norte CasaChiguaje, is consistent with the palaeoenvironmental conditions originally proposed for it based on mammals and botanical records, being characterized as mixed open grassland/forest areas surrounding permanent freshwater systems. The new sigmodontine evidence is used to discuss the putative scenarios of the ancient evolution of the subfamily in South America, favouring a model in which open areas (savannahs) to the east of the Andes played crucial role aiding or obstructing Late Miocene–Pliocene sigmodontine dispersion southwards.Fil: Ronez, Christophe. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto de Diversidad y Evolución Austral; ArgentinaFil: Carrillo Briceño, Jorge D.. Universitat Zurich. Instituto Palaontologisches Institut And Museum; SuizaFil: Hadler, Patrícia. Universidade Federal de Santa Catarina; BrasilFil: Sánchez Villagra, Marcelo Ricardo. Universitat Zurich. Instituto Palaontologisches Institut And Museum; SuizaFil: Pardiñas, Ulises Francisco J.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto de Diversidad y Evolución Austral; Argentina. Instituto Nacional de Biodiversidad; Ecuado

Infinitely many normalized solutions of L2L^2-supercritical NLS equations on noncompact metric graphs with localized nonlinearities

We consider the existence of solutions for nonlinear Schr\"odinger equations on noncompact metric graphs with localized nonlinearities. In an $L^2$-supercritical regime, we establish the existence of infinitely many solutions for any prescribed mass

The Performance Gap of Policy Information Systems: A Knowledge Infrastructure Assessment Framework

Digital technologies’ development and their ubiquity has significantly changed the way information is collected and shared. These changes are also observed in the ways that knowledge and information used to design and implement Science, Technology, and Innovation (STI) policies are increasingly made accessible via digital platforms. Lacking, however, are evaluation frameworks to measure the performance and effectiveness of public information systems used for STI policy work. This limits what we know about what aspects work for whom, when, and why. As a response to this gap limiting our collective capacity for improving their utility, this paper presents an assessment framework tool for STI policy-focused digital knowledge platforms. Our proposition is informed by theoretical lessons from the areas of work on Knowledge Infrastructures (KIs) and Next Generation Repositories (NGRs), and practical experiences from policy professionals working in STI policy domains. The tool’s architecture is structured around three interdependent thematic pillars of performance in the production, aggregation, distribution, and maintenance of knowledge in digital information platforms: the communities pillar, the technical systems pillar, and the sustainability pillar. To test the design and utility of our proposed evaluation framework, we applied it on a digital platform of STI policy instruments maintained by the United Nations Educational, Scientific, and Cultural Organization (UNESCO), the Global Observatory for Science, Technology, and Innovation Policy (GO-SPIN) platform. We conclude with reflections on future areas for evaluation framework development

Reconstruction of primary vertices at the ATLAS experiment in Run 1 proton–proton collisions at the LHC

This paper presents the method and performance of primary vertex reconstruction in proton–proton collision data recorded by the ATLAS experiment during Run 1 of the LHC. The studies presented focus on data taken during 2012 at a centre-of-mass energy of √s=8 TeV. The performance has been measured as a function of the number of interactions per bunch crossing over a wide range, from one to seventy. The measurement of the position and size of the luminous region and its use as a constraint to improve the primary vertex resolution are discussed. A longitudinal vertex position resolution of about 30μm is achieved for events with high multiplicity of reconstructed tracks. The transverse position resolution is better than 20μm and is dominated by the precision on the size of the luminous region. An analytical model is proposed to describe the primary vertex reconstruction efficiency as a function of the number of interactions per bunch crossing and of the longitudinal size of the luminous region. Agreement between the data and the predictions of this model is better than 3% up to seventy interactions per bunch crossing

Impacts of the Tropical Pacific/Indian Oceans on the Seasonal Cycle of the West African Monsoon

The current consensus is that drought has developed in the Sahel during the second half of the twentieth century as a result of remote effects of oceanic anomalies amplified by local land–atmosphere interactions. This paper focuses on the impacts of oceanic anomalies upon West African climate and specifically aims to identify those from SST anomalies in the Pacific/Indian Oceans during spring and summer seasons, when they were significant. Idealized sensitivity experiments are performed with four atmospheric general circulation models (AGCMs). The prescribed SST patterns used in the AGCMs are based on the leading mode of covariability between SST anomalies over the Pacific/Indian Oceans and summer rainfall over West Africa. The results show that such oceanic anomalies in the Pacific/Indian Ocean lead to a northward shift of an anomalous dry belt from the Gulf of Guinea to the Sahel as the season advances. In the Sahel, the magnitude of rainfall anomalies is comparable to that obtained by other authors using SST anomalies confined to the proximity of the Atlantic Ocean. The mechanism connecting the Pacific/Indian SST anomalies with West African rainfall has a strong seasonal cycle. In spring (May and June), anomalous subsidence develops over both the Maritime Continent and the equatorial Atlantic in response to the enhanced equatorial heating. Precipitation increases over continental West Africa in association with stronger zonal convergence of moisture. In addition, precipitation decreases over the Gulf of Guinea. During the monsoon peak (July and August), the SST anomalies move westward over the equatorial Pacific and the two regions where subsidence occurred earlier in the seasons merge over West Africa. The monsoon weakens and rainfall decreases over the Sahel, especially in August.Peer reviewe

Severe early onset preeclampsia: short and long term clinical, psychosocial and biochemical aspects

Preeclampsia is a pregnancy specific disorder commonly defined as de novo hypertension and proteinuria after 20 weeks gestational age. It occurs in approximately 3-5% of pregnancies and it is still a major cause of both foetal and maternal morbidity and mortality worldwide1. As extensive research has not yet elucidated the aetiology of preeclampsia, there are no rational preventive or therapeutic interventions available. The only rational treatment is delivery, which benefits the mother but is not in the interest of the foetus, if remote from term. Early onset preeclampsia (<32 weeks’ gestational age) occurs in less than 1% of pregnancies. It is, however often associated with maternal morbidity as the risk of progression to severe maternal disease is inversely related with gestational age at onset2. Resulting prematurity is therefore the main cause of neonatal mortality and morbidity in patients with severe preeclampsia3. Although the discussion is ongoing, perinatal survival is suggested to be increased in patients with preterm preeclampsia by expectant, non-interventional management. This temporising treatment option to lengthen pregnancy includes the use of antihypertensive medication to control hypertension, magnesium sulphate to prevent eclampsia and corticosteroids to enhance foetal lung maturity4. With optimal maternal haemodynamic status and reassuring foetal condition this results on average in an extension of 2 weeks. Prolongation of these pregnancies is a great challenge for clinicians to balance between potential maternal risks on one the eve hand and possible foetal benefits on the other. Clinical controversies regarding prolongation of preterm preeclamptic pregnancies still exist – also taking into account that preeclampsia is the leading cause of maternal mortality in the Netherlands5 - a debate which is even more pronounced in very preterm pregnancies with questionable foetal viability6-9. Do maternal risks of prolongation of these very early pregnancies outweigh the chances of neonatal survival? Counselling of women with very early onset preeclampsia not only comprises of knowledge of the outcome of those particular pregnancies, but also knowledge of outcomes of future pregnancies of these women is of major clinical importance. This thesis opens with a review of the literature on identifiable risk factors of preeclampsia

Penilaian Kinerja Keuangan Koperasi di Kabupaten Pelalawan

This paper describe development and financial performance of cooperative in District Pelalawan among 2007 - 2008. Studies on primary and secondary cooperative in 12 sub-districts. Method in this stady use performance measuring of productivity, efficiency, growth, liquidity, and solvability of cooperative. Productivity of cooperative in Pelalawan was highly but efficiency still low. Profit and income were highly, even liquidity of cooperative very high, and solvability was good