Instantaneous model of a MESFET for use in linear and nonlinear circuit simulations

A formal approach for nonlinear modeling of FETs is presented. The intrinsic transistor is described by current and charge generators, that are instantaneously dependent on the two internal voltages. The extrinsic parasitic elements are also included. This instantaneous model is obtained from the small signal equivalent circuit computed at a number of bias points, by integration of the bias dependent elements. A program for using this model in nonlinear circuit analysis has been developed. The process has been carried out for two transistors, one being of low noise, and the other a power MESFET. Good agreement has been observed when comparing the nonlinear analysis with measured data. A solid-state power amplifier at 28 GHz has been designed using the power transistor, delivering 21 dBm at 1 dB compression point.Peer ReviewedPostprint (published version

Reading customs and habits at Andalusian universities

En este artículo se presentan los resultados obtenidos sobre usos y hábitos de lectura en las diez universidades andaluzas. Los estudios se han desarrollado entre los estudiantes, profesores, Personal de Administración y Servicios (PAS) y población de ciudades con campus universitario, entre los años 2005 y 200

Impact of Participation in a Community Based, Even Start Literacy Program on School Achievement and Parent Involvement for English Language Learners (ELL)

The family literacy model underlying the national Even Start Family Literacy Program has not fared well in large-scale evaluation studies, with outcomes showing minimal or no positive impact on later school achievement. However, the results of these studies have not been replicated in smaller studies, which hold the possibility of yielding richer and possibly more valid data using appropriate research design, methods, and techniques. The aim of this study was to investigate the effect of an Even Start Family Literacy Program on the academic progress of a homogeneous group of ELL (English Language Learners) Hispanic immigrant elementary school-age children. Twenty-nine students were included in the study group (ACLAMO) and 33 in a control group that did not attend the program. The research was quasi-experimental, retrospective, and longitudinal. Demographic variables were surveyed. Parent literacy and involvement data were collected. Comprehensive language, reading, mathematics, and social emotional performance results were gathered from school records from kindergarten to fourth grade. Statistical analysis for group differences used Fisher\u27s exact test for comparison of frequency distribution of categorical variables and independent t test for means comparison of numerical variables. Also, the Pearson correlation coefficient between parent literacy or involvement variables and academic performance data was calculated. Significance was set at p \u3c .05 (two-tailed). The results of the study showed that students enrolled in the Even Start Family Literacy Program performed statistically significantly better in mathematics and language across grades, whereas the effect on reading was less significant. Overall, parent literacy and involvement variables correlated positively with selected language, reading, and mathematics performance variables, and negatively with social emotional behaviors. In summary, the current study showed that in a population of at risk Hispanic elementary school-age children, involvement in an Even Start Family Literacy Program, like ACLAMO, improves academic achievement. Educational and social interaction between parents and children and dual exposure to English and Spanish seem to be two important causal factors. The results support the hypothesis that educational interventions could induce positive changes in neuronal networks related to cognition

Introduction: Art, Advertising and Daily Life in the Private Space

En la actualidad, la vida privada se ha convertido en uno de los temas favoritos del arte contemporáneo.Las representaciones del mundo desde las diferencias culturales, étnicas o de género estánproduciendo cambios en nuestra propia identidad. Lo rutinario, lo habitual, lo íntimo, se convierten apartir de los años noventa en motivos principales del activismo artístico susurrándonos visualmentelas desvergüenzas de lo público. Fotografías de familias, retratos de desconocidos, espacios íntimos…narraciones imparciales de lo particular se exhiben hoy en las galerías de todo el mundo,conformando la representación de lo cotidiano como un nuevo género. Además, la intimidad contadaa través del ojo más directo y amateur de la fotografía ha introducido el estilo snap.El presente artículo estudiará las sinergias entre arte y publicidad, cómo ambos mundos comparten enmuchas ocasiones tanto temas como conceptos y en dónde éstos se distancian. Buscando dónde seencuentran las diferencias y las similitudes entre ambos mercados Porque, aunque la publicidadrepresente cada vez más lo familiar y lo íntimo, a priori pensamos que lo hace a través de la idealización.Convirtiendo lo insignificante, familiar o específico en lo diferente, emotivo o freak.At present, the private life has become one of the favorite subjects of the contemporary art. From theninety the daily things, become major reasons for the artistic activism. Pictures of families, portraitsof strangers, intimate spaces… narratives of what particular fair is now exhibited in the galleries fromaround the world. The intimacy counted through the eye and more direct amateur photography hasentered the style snap. This article explore the synergies between art and advertising, as both worldsshare on many occasions both topics such as concepts and where they move apart. Because, althoughthe advertising increasingly represents the familiar and the intimate, a priori we believe that it will doso through the idealization. Converting the insignificant, or specific family in what is different,emotive or freak

Experiences among undocumented migrants accessing primary care in the United Kingdom: a qualitative study.

Immigration is a key political issue in the United Kingdom. The 2014 Immigration Act includes a number of measures intended to reduce net immigration, including removing the right of non-European Economic Area migrants to access free health care. This change risks widening existing health and social inequalities. This study explored the experiences of undocumented migrants trying to access primary care in the United Kingdom, their perspectives on proposed access restrictions, and suggestions for policymakers. Semi-structured interviews were conducted with 16 undocumented migrants and four volunteer staff at a charity clinic in London. Inductive thematic analysis drew out major themes. Many undocumented migrants already faced challenges accessing primary care. None of the migrants interviewed said that they would be able to afford charges to access primary care and most said they would have to wait until they were much more unwell and access care through Accident & Emergency (A&E) services. The consequences of limiting access to primary care, including threats to individual and public health consequences and the additional burden on the National Health Service, need to be fully considered by policymakers. The authors argue that an evidence-based approach would avoid legislation that targets vulnerable groups and provides no obvious economic or societal benefit

Usos no reglados de la fotografía doméstica. Aplicaciones de la imagen doméstica en otros soportes fuera del álbum

Actas de las Quintas Jornadas Imagen, Cultura y Tecnología celebradas del 3 al 5 de julio de 2006 en la Universidad Carlos III de Madri

"You have to keep fighting": maintaining healthcare services and professionalism on the frontline of austerity in Greece.

BACKGROUND: Greece has been severely affected by the 2008 global economic crisis and its health system was, and still is, among the national institutions most shaped by its effects. METHODS: In 2014, this qualitative study examined these changes through in-depth interviews with 22 frontline healthcare professionals in five different locations in mainland Greece. These interviews with nurses, doctors and pharmacists explored perceptions of austerity and how ideas of professionalism were challenged and revised by these measures. RESULTS: Participants reported working conditions characterised by dramatic increases in public hospital admissions alongside decreases in personnel, consumables, materials, and also many hospital closures. Many drew on analogies of war and fighting to describe the effects of healthcare reforms on their working lives and professional conduct. Despite accounts of deteriorating conditions and numerous challenges, healthcare professionals presented themselves as making every effort to meet patients' needs, while battling to resist guidelines which they perceived diminished their roles to production-line operatives. CONCLUSIONS: Participants considered it their duty to defend their professional ethos and serve patients without compromising standards, even if this meant liberal interpretation and implementation of regulations. These professionals regarded themselves on the frontline of healthcare provision but also the frontline defence in a war on their professional standards from austerity

Feasibility of health systems strengthening in South Sudan: a qualitative study of international practitioner perspectives.

OBJECTIVE: To explore the feasibility of health systems strengthening from the perspective of international healthcare implementers and donors in South Sudan. DESIGN: A qualitative interview study, with thematic analysis using the WHO health system building blocks framework. SETTING: South Sudan. PARTICIPANTS: 17 health system practitioners, working for international agencies in South Sudan, were purposively sampled for their knowledge and experiences of health systems strengthening, services delivery, health policy and politics in South Sudan. RESULTS: Participants universally reported the health workforce as insufficient and of low capacity and service delivery as poor, while access to medicines was restricted by governmental lack of commitment in undertaking procurement and supply. However, progress was clear in improved county health department governance, health management information system functionality, increased health worker salary harmonisation and strengthened financial management. CONCLUSIONS: Resurgent conflict and political tensions have negatively impacted all health system components and maintaining or continuing health system strengthening has become extremely challenging. A coordinated approach to balancing humanitarian need particularly in conflict-affected areas, with longer term development is required so as not to lose improvements gained