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

Optimizing survival outcomes with post-remission therapy in acute myeloid leukemia.

Optimization of post-remission therapies to maintain complete remission and prevent relapse is a major challenge in treating patients with acute myeloid leukemia (AML). Monitoring patients for measurable residual disease (MRD) is helpful to identify those at risk for relapse. Hypomethylating agents are being investigated as post-remission therapy. Identification of recurrent genetic alterations that drive disease progression has enabled the design of new, personalized approaches to therapy for patients with AML. Emerging data suggest that targeted post-remission therapy, alone or in combination with chemotherapy, may improve outcomes. Results of ongoing clinical trials will further define potential clinical benefits

The Research on Moral and Civic Education in the Spanish Educational Theory – Evolution and current trends

With this paper the editors of the Journal of Social Science Education start a new kind of report which presents an overview of scholarly discourses on civic education and economic education in several European countries. The overall aim is to provide a first access to these discourses which are often rather difficult to reach. By publishing reports on these national scientific fields the editors of JSSE hope to facilitate the mutual perception of scholars and the development of a European discourse. The NECE database “Networking European Citizenship Education” which is available at http://www.nece.eu and at the German Federal Agency of Civic Education may help networking, too

Educación para el desarrollo humano, educación como ayuda al crecimiento

El fenómeno social de la pobreza, es una de las mayores preocupaciones de las políticas de desarrollo a escala mundial, y es también uno de los más dificiles de solucionar. A pesar de los logros conseguidos hasta el momento, no se ha podido romper su presencia cíclica en todos los países del planeta. Con la mirada esperanzada puesta en el futuro, se propone en este trabajo titulado “Educación para el desarrollo humano, educación como ayuda al crecimiento”, una tesis sencilla: se trata de procurar prepapar el desarrollo, a través de la educación, en la infancia. Lo sugerente de la propuesta es que, aquí, se entiende la educación como ayuda al crecimiento y que el desarrollo para ser eficaz debe ser puesto en marcha en el ámbito más cercano a las personas: el local o comunitario. Así, y como forma de luchar contra la pobreza, se propone una educación que, desde la infancia, prepare a los individuos para actuar de forma libre, comprometida y responsable en la mejora de las condiciones de vida que le rodean. Cuánto más crezca cada miembro de la comunidad como persona, más activamente podrá luchar contra la pobreza y a favor de su propio desarrollo y el de sus convecinos

HM 8: The Fraternity of the Blue Uniform

Admiral Richard G. Colbert\u27s particular approach to U.S. naval strategy, placing as it did great emphasis on the need to enhance cooperation between the U.S. Navy and friendly maritime forces, was not entirely different from the maritime strategy of the 1980s.https://digital-commons.usnwc.edu/usnwc-historical-monographs/1007/thumbnail.jp

Time-delay and Doppler tests of the Lorentz symmetry of gravity

Modifications to the classic time-delay effect and Doppler shift in General Relativity (GR) are studied in the context of the Lorentz-violating Standard-Model Extension (SME). We derive the leading Lorentz-violating corrections to the time-delay and Doppler shift signals, for a light ray passing near a massive body. It is demonstrated that anisotropic coefficients for Lorentz violation control a time-dependent behavior of these signals that is qualitatively different from the conventional case in GR. Estimates of sensitivities to gravity-sector coefficients in the SME are given for current and future experiments, including the recent Cassini solar conjunction experiment.Comment: 13 pages, 4 figures, references added, matches PRD versio

Phasing out steam methane reformers with water electrolysis in producing renewable hydrogen and ammonia: A case study based on the Spanish energy markets

Deploying renewable hydrogen presents a significant challenge in accessing off-takers who are willing to make long-term investments. To address this challenge, current projects focus on large-scale deployment to replace the demand for non-renewable hydrogen, particularly in ammonia synthesis for fertiliser production plants. The traditional process, involving Steam Methane Reformers (SMR) connected to Haber-Bosch synthesis, could potentially transition towards decarbonisation by gradually integrating water electrolysis. However, the coexistence of these processes poses limitations in accommodating the integration of renewable hydrogen, thereby creating operational challenges for industrial hubs. To tackle this issue, this paper proposes an optimal dispatch model for producing green hydrogen and ammonia while considering the coexistence of different processes. Furthermore, the objective is to analyse external factors that could determine the appropriate regulatory and pricing framework to facilitate the phase-out of SMR in favour of renewable hydrogen production. The paper presents a case study based in Spain, utilising data from 2018, 2022 and 2030 perspectives on the country's renewable resources, gas and electricity wholesale markets, pricing ranges, and regulatory constraints to validate the model. The findings indicate that carbon emissions taxation and the availability and pricing of Power Purchase Agreements (PPAs) will play crucial roles in this transition - the carbon emission price required for total phasing out SMR with water electrolysis would be around 550 EUR/ton CO2