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

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

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

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

Trust in health care encounters and systems: a case study of British pensioners living in Spain.

Research on trust in health care faces two enduring challenges. Firstly, there are conceptual ambiguities in distinguishing trust from related concepts, such as confidence or dependence. Second, the tacit understandings which underpin the 'faith' element of trust are difficult to explicate. A case study of British pensioners who have moved to Spain provides an opportunity to explore trust in a setting where they often have a choice of where to access health care (UK or Spain), and are therefore not in a state of dependence, and in which the 'differences' of a new field generates reflection on their tacit expectations of providers and systems. In accounting for decisions to use (or not to use) Spanish health care, British pensioners cited experiential knowledge of symbolic indicators of trustworthy institutions (they were hygienic, modern, efficient), which contributed to background confidence in the system, and interpersonal qualities of practitioners (respect for older people, embodied empathy and reciprocity) which evoked familiar relations, within which faith is implicit. In contrast, with limited recent access to the British system, their background confidence had been compromised by reports of poor performance, with few opportunities to rebuild the interrelational bases of trust

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

: health is my capital: a qualitative study of access to healthcare by Chinese migrants in Singapore.

BACKGROUND: Since the 1970s, Singapore has turned into one of the major receiving countries of foreign workers in Southeast Asia. Over the years, challenges surrounding access to healthcare by Chinese migrant workers have surfaced globally. This study aims to explore the experiences of Chinese migrants accessing primary and secondary/tertiary healthcare in Singapore, and the opportunities for overcoming these barriers. METHODS: We conducted 25 in-depth interviews of 20 Chinese migrants and five staff from HealthServe, a non-governmental organization serving Chinese migrants in Singapore from October 2015 to January 2016. Interviews were transcribed and analysed inductively adopting thematic analysis. RESULTS: Chinese migrants in Singapore who were interviewed are mainly middle-aged breadwinners with multiple dependents. Their concept of health is encapsulated in a Chinese proverb "", meaning "health is my capital". Health is defined by them as a personal asset, needed to provide for their families. From their health-seeking behaviors, six pathways were identified, highlighting different routes chosen and resulting outcomes depending on whether their illness was perceived as major or minor, and if they sought help from the private or public sector private or public sector. Key barriers were identified relating to vulnerabilities during the migration process, during their illness, when consulting with healthcare providers, and during repatriation. A transactional doctor-patient culture in China contrasts with the trust migrants place in Singaporean's public health system, perceived as equitable and personable. However, challenges remain for injured migrants who sought help from the private sector and those with chronic diseases. CONCLUSIONS: Policy recommendations to increase patient autonomy enabling choice of healthcare provider and provide for non-work related illnesses are suggested. Partnerships between migrant advocacy organizations and various stakeholders such as hospitals, government agencies and employers can be strengthened