Load-independent characterization of trade-off fronts for operational amplifiers

Abstract—In emerging design methodologies for analog integrated circuits, the use of performance trade-off fronts, also known as Pareto fronts, is a keystone to overcome the limitations of the traditional top-down methodologies. However, most techniques reported so far to generate the front neglect the effect of the surrounding circuitry (such as the output load impedance) on the Pareto-front, thereby making it only valid for the context where the front was generated. This strongly limits its use in hierarchical analog synthesis because of the heavy dependence of key performances on the surrounding circuitry, but, more importantly, because this circuitry remains unknown until the synthesis process. We will address this problem by proposing a new technique to generate the trade-off fronts that is independent of the load that the circuit has to drive. This idea is exploited for a commonly used circuit, the operational amplifier, and experimental results show that this is a promising approach to solve the issue

Resistance to the SDHI fungicides boscalid and fluopyram in Podosphaera xanthii from commercial cucurbit fields in Spain

Powdery mildew elicited by Podosphaera xanthii is a devastating disease of cucurbits worldwide and one of the most important diseases affecting these crops in Spain. Application of fungicides is the main control practice for managing P. xanthii; however, isolates resistant to multiple classes of site-specific fungicides have been recently reported in the Spanish cucurbit powdery mildew population. Succinate dehydrogenase inhibitors (SDHIs) constitute a relatively novel class of fungicides registered for powdery mildew control representing new alternatives for cucurbit growers. In the present study, 30 P. xanthii isolates were used to determine the effective concentration that reduces mycelial growth by 50% (EC50) to boscalid and fluopyram. The present study was also conducted to obtain discriminatory doses to monitor SDHI fungicide resistance in 180 P. xanthii isolates collected from several commercial cucurbit fields in Spain during 2017-2018. Three SDHI resistance patterns were observed in our population, which include patterns I (resistance to boscalid), II (resistance to fluopyram), and III (resistance to boscalid and fluopyram). The amino acid changes associated with these resistance patterns in the Sdh protein were also examined. Based on our results, SDHI fungicides are good alternatives for cucurbit powdery mildew control, although they should be applied with caution.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tec

Good practices in school to educate critical citizens: the youth parliament programme from the perspective of secondary school teachers in training

ERPA International Congresses on Education 2018This paper refers to the European project Erasmus + ELEF (European Learning Environment Formats for Citizenship and Democracy, Reference number 580426). The aim of this project is to develop, implement, evaluate and replicate democratic and innovative learning environments (good practices) in both educational institutions and informal and community learning environments. In this context, over the course of a year, a number of experiences considered relevant have been selected, which constitute the sample of this research on good practices. This contribution presents the educational programme “Youth Parliament”. This is a project with a long history and whose main objective is to train responsible citizens, with the collaboration of various educational agents. The evaluation carried out by the Secondary Education teachers in training on the potentialities and limitations of the programme is shown, based on the experiences carried out in the participating educational centres during the academic year 2016-2017

Union Games: Technological Unemployment

Given a production economy, we define a trade union game by considering strategic behavior on factor supplies. We refer to the Nash equilibria of this game as trade union equilibria. First we analyze situations under which unemployment of factors are supported as trade union equilibria. The degree of unemployment depends on technological conditions. In this line, we suggest a source of unemployment which differs from the usual sources provided in the related literature. Then, we state a limit result which shows that when the market power of trade unions decreases the corresponding sequence of trade union equilibria converges to the walrasian equilibrium, that is, to full employment of factors.Trade Union Games, unemployment, walrasian equilibrium, manipulability.

Higher order Whitehead products and L∞L_\infty structures on the homology of a DGL

We detect higher order Whitehead products on the homology $H$ of a differential graded Lie algebra $L$ in terms of higher brackets in the transferred $L_\infty$ structure on $H$ via a given homotopy retraction of $L$ onto $H$.Comment: New references and minor correction

Test item taxonomy based of functional criteria

There are many taxonomies that try to classify and apply some consistency to the very many item types currently in existence. They all have various limitations, however, such as ambiguous classification criteria, little discrimination between format types, and referring almost exclusively to pen-and-paper or screen-based items. This paper aims to overcome these limitations by proposing a new item format taxonomy based on functional criteria. Current classifications are reviewed, the criteria they are based on are examined and their limitations are identified. The proposed alternative classification identifies four essential components of items according to function: the structure of the included content, the device used for transmission of the question to the examinee, the device for receiving the response, and the instructions to the examinee about how to understand and respond to the item. The combination of different facets of these four components allows any format of item to be classified, both existing formats and those that may appear in the future. In addition to systematically and coherently classifying items, this new taxonomy may also be of great utility in the construction and research of new items. The proposed model is illustrated by examples showing how specific items are classified, using a checklist as a guide.Ministerio de Economía y Competitividad de España PSI2014-56114-PMinisterio de Economía y Competitividad de España PSI2017-85724-

Problemas socioambientales: concepciones del profesorado en formación inicial

El vertiginoso ritmo de cambio de las últimas décadas, plantea necesariamente una nueva forma de entender y relacionarse con el planeta, donde la educación tiene mucho que decir. El presente estudio establece como objetivo describir las concepciones referentes a los problemas socio-ambientales del profesorado en formación inicial, a través de una muestra de 144 estudiantes universitarios del grado de educación primaria en las universidades españolas de Sevilla y Extremadura, durante el curso académico 2014-2015. Los resultados obtenidos con el cuestionario de preguntas abiertas, aunque esperanzadores, muestran un largo camino en el que seguir trabajando. El currículum educativo, la organización escolar y las familias, se detectan como dificultades para abrir puertas entre la escuela y su entorno

Loss of diversity in the community of small mammals of Doñana National Park (SW Spain): another effect of the local climate change ?

Doñana National Park is an important wetland located in the southwest Spain forming part of the Mediterranean Basin, a "biodiversity hotspot" especially vulnerable to climate change. In this study, we investigate changes in diversity and abundance occurred between 1978 and 2016 in the community of small mammals of Doñana and their relationship with local climate changes. Capture-mark-recapture methods were carried out for a total of 16 years, unevenly distributed over four decades. Our findings show a consistent loss of diversity and abundance decline in the community of small mammals. Eliomys quercinus and Rattus rattus have almost disappeared from the area and Apodemus sylvaticus has sharply reduced its abundance parallel to the progressive increase of Mus spretus. Such a process is worrying for conservation as small mammals represent, after rabbits, the most important prey for carnivores and raptors in Doñana. The detected changes could be at least partially explained by the progressive increase in local temperature observed during the study period. In line with this, the species that have suffered a greater decline are those of Eurasian origin and northern distribution as is the case for E. quercinus and R. rattus while the current dominant species, M. spretus, proceeds from Africa and has a Mediterranean distribution. A non-exclusive alternative is that the extreme rarefaction of rabbits may have caused a trophic cascade effect enhancing predation by carnivores and raptors towards gradually smaller species.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Vivències, sensacions i percepcions després d’una ruptura amorosa. Aproximació a les concepcions de les dones madures respecte als seus cossos, la seva sexualitat i la reconstrucció d’una nova vida sentimental.

Treballs Finals del Grau de Sociologia, Facultat d'Economia i Empresa, Universitat de Barcelona, Curs: 2016-2017 , Tutor: Clara Camps(cat) Aquesta recerca pretén analitzar les percepcions i sensacions que senten les dones d’entre 45 a 55 anys, després d’haver viscut una ruptura amorosa. S’analitza, doncs, la reconstrucció de la vida amorosa, les percepcions sobre el seu cos i la relació que s’estableix amb la pròpia sexualitat. Es tracta de donar veu a un col·lectiu silenciat i una temàtica que des de la literatura científica no se li ha parat molta atenció. A la vegada, que es presenta de gran interès tractar temàtiques micro-socials, de caràcter quotidià en l’àmbit de la sociologia. Per dur a terme la recerca s’ha utilitzat dues tècniques d’investigació de caràcter qualitatiu que han permès recollir la informació adient - l’entrevista i el grup de discussió. Del seu anàlisi se n’ha extret, que la ruptura amorosa suposa un moment dolorós, però alhora un espai de descoberta per una mateixa. Es visualitza, també, efectes de la ruptura amorosa com és la inseguretat a l’hora de reconstruir la vida sentimental. Així com, la recerca expressa que l’heteronormativitat sexual viscuda i l’intent d’assolir l’ideal de bellesa hegemònic condiciona enormement com han viscut aquestes dones la ruptura amorosa.(eng) This research aims to analyse the perceptions and sensations felt by woman from 45 of 55 years old, having lived a romantic break. We analysed the reconstruction of the love life and perceptions about her body and the relationships with their own sexuality. It is about giving voice to a group silenced throughout and a theme that from the scientific literature has not received much attention. At the same time, it is of great interest dealing with micro-social issues of daily character. Two qualitative research techniques to collect have been used gather the adequate information: interview and discussion group. Of their analysis has been extracted that a romantic break represents a painful moment but also a place of discovery for yourself. Is also visualized the effect of the rupture as is the insecurity when it comes to rebuilding sentimental life. As well as research expresses that sexual heteronormativity and the attempt of assuming the ideal of hegemonic beauty affects how these women live a romantic break