Estimating evaporation from a wet grassland

International audienceWet grasslands are being restored across the UK and Europe to reinstate their high biodiversity following over 50 years of drainage and conversion to arable agriculture. The water balance of many wet grasslands is dominated by precipitation and evaporation and it is essential to quantify evaporation rates to understand the hydrological functioning of wetlands and the implications for water resources in catchments where wetlands are being restored. This paper considers data from direct measurements of evaporation from the Pevensey Levels wet grassland using the eddy correlation method. Equations are derived to predict actual evaporation using meteorological data on the site or from standard meteorological station observations. It was found that evaporation could be estimated reliably from meteorological variables, such as wind speed, temperature and humidity and by water availability. It was also found that when water availability is high, evaporation is high and may exceed reference evaporation values, raising questions over the deployment of the two-step Penman-Monteith model unless reliable crop coefficients and relative evaporation figures can be determined

Inclusion of higher order terms for small-signal (modal) analysis: Committee report - task force on assessing the need to include higher order terms for small-signal (modal) analysis

© 2005 IEEE.This paper summarizes the work done by the Task Force on Assessing the Need to Include Higher Order Terms for Small-Signal (Modal) Analysis. This Task Force was created by the Power System Dynamic Performance Committee to investigate the need to include higher order terms for small signal (modal) analysis. The focus of the work reported here is on establishing and documenting the practical significance of these terms in stability analysis using the method of Normal Forms. Special emphasis was placed on determining and describing conditions when higher order terms need to be included to accurately describe modal interactions. Test cases were developed on a standard test system to demonstrate the application of appropriate indices to detect the occurrence of nonlinear interaction and hence the need for higher order terms in stability analyzes. The use of the higher order terms in the site selection for a damping controller is also documented.Sanchez-Gasca, Juan J.,Vittal, Vijay; Gibbard, Michael J.; Messina, Arturo Roman; Vowles, David J.; Liu, Shu; Annakkage, Udaya D

Total positivity: tests and parametrizations

An introduction to total positivity (TP), with the emphasis on efficient TP criteria and parametrizations of TP matrices. Intended for general mathematical audience.Comment: 20 pages, with color figure

Challenges and opportunities for heritage language learners in interpreting courses in the U.S. context

Recent studies indicate that heritage language speakers have professional opportunities in translation and interpreting (e.g., Carreira, 2014a) because of their unique linguistic and cultural background. In addition, heritage language speakers’ unique background and previous experiences as language brokers or non-professional interpreters or translators have also been suggested as an advantage in the context of translation and interpreting pedagogy (e.g., Valdés, 2003). The field of interpreting pedagogy, initially modeled and taught by professionals in the field based on their experience, has favored a more research-based interpreting pedagogy that draws on empirically-grounded studies focusing on interpreting competence and instructional strategies (e.g., Colina & Angelelli, 2015a). Despite the recent growth in research-based pedagogy, there is limited reflection on the challenges and opportunities heritage language speakers face in interpreting courses. Research has shown that heritage language and second language speakers exhibit a number of differences that have a direct impact on heritage language education (e.g., Potowski & Lynch, 2014; Carreira, 2016b); however, these differences have not been fully explored in the context of interpreter education. The present article contributes to this gap and encourages further work in this area by investigating the underexplored relationships among language for specific purposes, heritage language education, and translation and interpreting. In doing so, this work aims to understand the role and profile of heritage language learners in interpreting courses and how existing skillsets may be better exploited to guide interpreter education. First, the literature on heritage language learners and education is reviewed in conjunction with interpreting pedagogy. Then, challenges and opportunities for this subpopulation of students are discussed while identifying potential avenues for additional investigation. Según algunos estudios recientes, la traducción e interpretación presenta oportunidades profesionales para los hablantes de lenguas de herencia debido a la naturaleza única de sus antecedentes lingüísticos y culturales (p. ej., Carreira, 2014a). Asimismo, se ha sugerido que sus antecedentes y experiencias previas como mediadores lingüísticos o intérpretes y traductores no profesionales podrían constituir una ventaja en el contexto de la pedagogía de la traducción e interpretación (p. ej., Valdés, 2003). El campo de la pedagogía de la interpretación, inicialmente guiado y dictado por profesionales en el campo según sus experiencias, ha favorecido una pedagogía basada en estudios de investigación de corte empírico que priorizan el estudio de la competencia de interpretación y las estrategias instruccionales (p. ej., Colina & Angelelli, 2015a). A pesar de la prevalencia de la pedagogía basada en la investigación, las dificultades y oportunidades a las que se enfrentan los hablantes de lenguas de herencia en cursos de interpretación ha recibido limitada atención. Los estudios de investigación han puesto de manifiesto que los estudiantes de lenguas de herencia y los de segundas lenguas exhiben una serie de diferencias que tienen un impacto directo en el campo de la enseñanza de lenguas de herencia (p. ej., Potowski & Lynch, 2014; Carreira, 2016b); sin embargo, estas diferencias apenas se han explorado en el contexto de la formación de intérpretes. El presente artículo contribuye a este vacío y promueve más investigaciones en esta área mediante la examinación de las conexiones, hasta ahora poco exploradas, entre la lengua con fines específicos, la enseñanza de lenguas de herencia y la traducción e interpretación, con el objetivo de reflexionar sobre el papel y el perfil de los estudiantes de lenguas de herencias en cursos de interpretación y cómo explotar las habilidades con las que cuentan para guiar la pedagogía de la interpretación. En primer lugar, se lleva a cabo una revisión de la literatura sobre los estudiantes de lenguas de herencia y la enseñanza de lenguas de herencia junto con la pedagogía de la interpretación. En segundo lugar, se analizan las dificultades y oportunidades de este subgrupo de estudiantes, así como posibles áreas de investigación

Can pictures have explicatures?

This paper considers the question of whether pictures can be understood to give rise to explicit meanings. In relevance-theoretic terms, this means asking whether pictures give rise to ‘explicatures’. The definition of the term ‘explicature’ seems to rule out this possibility except in cases where pictures include or are accompanied by material with coded meanings. The paper considers a range of non-verbal phenomena with coded meanings, including pictograms (Forceville 2011, Forceville et al 2014). It then considers whether the explicature-implicature distinction could be relevant to pictures without such elements. Some assumptions communicated by pictures seem to be more ‘explicature-like’ than others, so it is possible that the distinction will be useful. The question is not merely terminological as the discussion leads to a fuller understanding of ways in which pictures communicate

Regulation of mammary gland branching morphogenesis by the extracellular matrix and its remodeling enzymes.

A considerable body of research indicates that mammary gland branching morphogenesis is dependent, in part, on the extracellular matrix (ECM), ECM-receptors, such as integrins and other ECM receptors, and ECM-degrading enzymes, including matrix metalloproteinases (MMPs) and their inhibitors, tissue inhibitors of metalloproteinases (TIMPs). There is some evidence that these ECM cues affect one or more of the following processes: cell survival, polarity, proliferation, differentiation, adhesion, and migration. Both three-dimensional culture models and genetic manipulations of the mouse mammary gland have been used to study the signaling pathways that affect these processes. However, the precise mechanisms of ECM-directed mammary morphogenesis are not well understood. Mammary morphogenesis involves epithelial 'invasion' of adipose tissue, a process akin to invasion by breast cancer cells, although the former is a highly regulated developmental process. How these morphogenic pathways are integrated in the normal gland and how they become dysregulated and subverted in the progression of breast cancer also remain largely unanswered questions

An overview of the lower cretaceous dinosaur tracksites from the mirambel formation in the iberian range (ne spain)

Up to now, the ichnological vertebrate record from the Barremian Mirambel Formation (NE Spain) has remained completely unknown despite the fact that osteological findings have been reported in recent years. Here we provide an overview of 11 new dinosaur tracksites found during a fieldwork campaign in the year 2011. The majority of these tracksites (seven) preserve small- to medium-sized tridactyl tracks here assigned to indeterminate theropods. Only one footprint presents enough characters to classify it as Megalosauripus isp. Ornithopod tracks identified as Caririchnium isp. and Iguanodontipodidae indet. and sauropod tracks are recorded at two tracksites. The footprints are preserved in a variety of paleoenvironmental conditions and thus display different kinds of preservation (true tracks, shallow undertracks, natural casts and undertrack casts). The ichnological record from the Mirambel Formation seems to be theropod dominated. This is a clear discrepancy with the osteological record identified in this formation, which shows a predominance of ornithopod dinosaurs

Biotechnological production and application of fructooligosaccharides

Currently, prebiotics are all carbohydrates of relatively short chain length. An important group is the fructooligosaccharides, which are a special kind of prebiotics associated to their selective stimulation of the activity of certain groups of colonic bacteria that have a positive and beneficial effect on intestinal microbiota, reducing incidence of gastrointestinal infections, respiratory and also possessing a recognized bifidogenic effect. Traditionally, these prebiotic compounds have been obtained through extraction processes from some plants, as well as through enzymatic hydrolysis of sucrose. However, different fermentative methods have also been proposed for the production of fructooligosaccharides, such as solid-state fermentation utilizing various agroindustrial by-products. By optimizing the culture parameters, fructooligosaccharides yields and productivity can be improved. The use of immobilized enzymes and cells has also been proposed as being an effective and economic method for large-scale production of fructooligosaccharides. This paper is an overview on the results of recent studies on fructooligosacharides biosynthesis, physicochemical properties, sources, biotechnological production and applications.The authors thank the National Council of Science and Technology of Mexico (CONACYT) for funding this study. D. A. Flores-Maltos thank the CONACYT for the financial support provided for her postgraduate studies in the Food Science and Technology Program, Universidad Autonoma de Coahuila, Mexico

Protocolos y métodos de colecta para el estudio de artrópodos de dosel en bosques de niebla del neotrópico

Protocols and methods to collect and study canopy arthropods of neotropical cloud forests are presented. Advantages, disadvantages and collect standardization for each method are suggested, to optimize the research in the canopy. A key to choice an appropriate method of collection for researchers interested in the study of canopy arthropods in the cloud forest is provided.Se presentan protocolos para la colecta y estudio de artrópodos del dosel de los bosques de niebla neotropicales. Para cada método se indican las ventajas y desventajas y se sugiere una estandarización de colecta para optimizar la investigación en el dosel. Se proporciona una clave para la elección de un método adecuado de colecta para investigadores interesados en el estudio de artrópodos de dosel en los bosques de niebla

Addressing cervical cancer disparities in Texas: Expansion of a community-based prevention initiative for medically underserved populations

Although cervical cancer is preventable, significant disparities exist in access to screening and prevention services. In medically underserved areas (MUAs) of Texas, these rates are 55% higher compared to the remainder of the US. In 2019, we expanded a multicomponent, comprehensive program to improve cervical cancer prevention in partnership with 13 clinics and mobile vans in MUAs of Texas. Our multicomponent intervention program consists of community education and patient navigation coupled with a training/mentoring program for local medical providers to perform diagnostic procedures and treatment for patients with abnormal screening results. Hands-on training courses to learn these skills are coupled with biweekly telementoring conferences using Project ECHO® (Extension for Community Healthcare Outcomes). This program was implemented in 2015 and expanded to other MUAs in Texas in 2019. From March 2019 to August 2022, 75,842 individuals were educated about cervical cancer screening and HPV vaccination. A total of 44,781 women underwent screening for cervical cancer, and 2,216 underwent colposcopy and 264 underwent LEEP. High-grade cervical dysplasia was diagnosed in 658 individuals and invasive cervical cancer in 33 individuals. We trained 22 providers to perform colposcopy and/or LEEP. In addition, 78 Project ECHO telementoring sessions were held with an average of 42 attendees per session, with 72 individual patient cases discussed. Our comprehensive community-based prevention initiative for medically underserved populations has led to a significant number of individuals undergoing cervical cancer screening in MUAs, as well as improved access to colposcopy and LEEP services