Two Octave Phemt Power Amplifier for EW Applications

Two 4.5-18 GHz MMIC amplifiers have been designed and fully tested. They have been fabricated using the Power pHemt process available at TriQuint Semiconductor, Texas. The first amplifier is a one stage distributed power amplifier which has been power optimised and exhibits 1W CW output power for a 6 dB associated gain. The second amplifier is a 2W three stage power amplifier with 20 dB gain. They are part of a first run launched in order to evaluate the different wideband structures and to improve linear and non linear models

Entreprise et organisations

374 p., tabl

Caracterização da mineração aurífera em Faina, Goiás, em um contexto ambiental histórico e atual Caracterization of gold mining in Faina, Goiás, Brazil, in a historical and an actual environmental context

Faz-se, por meio de uma abordagem ambiental histórico-dialética, a caracterização dos processos auríferos desenvolvidos no município de Faina, Goiás. São analisadas três atividades: mineração escrava, mineração de dragagem e mineração industrial. Evidenciou-se que a exploração por dragagem tem um maior poder impactante. Sobretudo, a mineração aurífera em Faina contribuiu para a história ambiental local e para o resgate dessa no Brasil.<br>We have analysed the three main processes of gold mining - slave mining, dredging and industrial gold mining -, by means of an environmental historical-dialectic approach in the municipality of Faina, in the Brazilian State of Goias State. The data showed that dredging had the greatest environmental impact on the area. The gold mining activities in Faina strongly contributed to the environmental history of the municipality and to the memory of this type of mining in Brazil

A comprehensive model of predictors of quality of life in older adults with schizophrenia: results from the CSA study

International audienc

Late-onset and nonlate-onset schizophrenia: A comparison of clinical characteristics in a multicenter study

International audienceObjectives Data are scarce regarding the potential clinical differences between non-late onset schizophrenia (NLOS, i.e., disorder occurring before 40 years of age), late-onset schizophrenia (LOS, occurring between ages 40 and 60 years) and very-late-onset schizophrenia-like psychosis (VLOSLP, occurring after 60 years of age). Furthermore, previous research compared LOS patients with non-age matched NLOS patients. In this study, we sought to examine potential clinical differences between patients of similar age with LOS and NLOS. Methods/Design This is a cross-sectional multicentre study that recruited in- and outpatients older adults (aged >= 55 years) with an ICD-10 diagnosis of schizophrenia or schizoaffective disorder with NLOS and LOS. Sociodemographic and clinical characteristics, comorbidity, psychotropic medications, quality of life, functioning, and mental health care utilization were drawn for comparison. Results Two hundred seventy-two participants (79.8%) had NLOS, 61 (17.9%) LOS, and 8 (2.3%) VLOSLP. LOS was significantly and independently associated with greater severity of emotional withdrawal and lower severity of depression (all p < 0.05). However, the magnitude of these associations was modest, with significant adjusted odds ratios ranging from 0.71 to 1.24, and there were no significant between-group differences in other characteristics. Conclusion In an age-matched multicenter sample of elderly patients with schizophrenia, older adults with LOS were largely similar to older adults with NLOS in terms of clinical characteristics. The few differences observed may be at least partially related to symptom fluctuation with time. Implications of these findings for pharmacological and nonpharmacological management is yet to be determined