Search results for "POWER"
showing 10 items of 5099 documents
Modeling propagation for high-power cylindrical microwave applicators
2001
In this letter, the dispersion characteristics and energy configurations of a cylindrical partially filled waveguide or lossy multilayered rod shielded by a metallic enclosure are presented for several modes. These parameters are obtained by a numerical simulation based on the residues theory. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 30: 192–195, 2001.
Modelling of Laser Operation in RPE Nd3+:LiNbO3 Channel Waveguides
2006
In this work, laser action in RPE Nd3+:LiNbO3 is modelled by using the overlapping integrals method. Different pumping schemes, TE or TM, have been considered in order to reproduce the experimental measurements. Calculated results indicate that the slope efficiency remains basically independent on the pumping scheme while the threshold pump power increases for TE pumping.
Normes et formes de l'intérêt et du désintéressement à l'heure de la marchandisation du lien communautaire
2016
Market exchanges would be evolving into a more horizontal and collaborative model. We can notice the strength of this movement within 2.0 merchant platforms. Then, we propose to explore the tension between giving and commodification through the concepts of interest and empowerment. Our main hypothesis is about a reconfiguration of online giving in a form of "disinterested interest". We will bring this issue through an exploratory study on Airbnb.
POWERFUL KNOWLEDGE AS THE FUTURE OF SCHOOL CURRICULUM
2020
The global, social, economic and technological conditions of the 21st century are drastically changing the way societies and education policymakers understand the goals of education. Pedagogy has always been about how to pass on the knowledge, skills, values, and development of one's personality to the next generation, to create the conditions for growth that meet everyone’s needs and provide equal opportunities. However, today this issue has become more relevant than ever as the world is changing very rapidly, society, its values, and needs are changing, as confirmed by the UNESCO goals for 2030.Young, pointing out that in many countries education policy neglects what knowledge a student n…
“What you do to Children Matters”: Motherhood in Toni Morrison's God Help the Child
2015
Toni Morrison’s latest novel, God Help the Child, explores the damaging effects of racism on motherhood and the dramatic impact of toxic mothering upon children. The institution of patriarchal motherhood fails to enact the critical tasks of motherwork —preservation, nurturance and cultural bearing, while mothering is a potential site of empowerment of black children and African American culture. African American authoritarian parenting style, associated with patriarchal motherhood, has a correlation with diverse factors, such as the legacy of slavery and its survival strategies, low-income and/or single-parent households and the disruption of the motherline. Motherhood distorted by racism c…
Energy-aware design for wireless mesh networks
2014
International audience; Wireless mesh networks (WMNs) are the next step in the development of the wireless architecture, delivering wireless services for a large variety of users in personal, local, campus, and metropolitan areas. Energy efficiency solutions are becoming more vital for both local access networks and wireless networks and Green IT has attracted a considerable attention. However, the application of green network for wireless mesh networks has seldom been described in the literature. However, WMNs infrastructure devices are always active. Thus, during lower traffic periods the energy consumption is the same as in busy hours, while it would be possible to save a large amount of…
Energy efficient and distributed resource allocation for wireless powered OFDMA multi-cell networks
2017
In this paper, we investigate the energy efficient resource allocation problem for the wireless powered OFDMA multi-cell networks. In the considered system, the users who have data to transmit in the uplink can only be empowered by the wireless power obtained from multiple base stations (BSs) with a large scale of multiple antennas in the downlink. A time division protocol is considered to divide the time of wireless power transfer (WPT) in the downlink and wireless information transfer (WIT) in the uplink into separate time slot. With the objective to improve the energy efficiency (EE) of the system, we propose the antenna selection, time allocation, subcarrier and power allocation schemes…
Nietzsche o la voluntad de poder: una lectura
2018
This brief article suggests a reading of the nietzschean concept of Will to Power. First, starting from Heidegger and Deleuze¿s interpretations, an analysis on the differences between Schopenhauer¿s concept of Will and Nietzsche¿s Will to Power is developed, followed by a contrast between Nietzsche¿s Will to Power and Darwin¿s assumptions on the Theory of Evolution. Finally, Will to Power as a key concept in Nietzsche¿s ontology and epistemology is highlighted.
A methodology for evaluation of operational zones for distributed generation based on DFIG
2017
This study developed a methodology to determine zones of acceptable voltage profiles for wind power generation connected to distribution systems. Three load profiles (residential, commercial and industrial) connected to the distribution network were analyzed considering the impact on voltage levels and steady-state stability for different wind speeds and wind generator control strategies. The wind generator model is based on doubly fed induction generator (DFIG) and were developed using Matlab/Simulink. The presented methodology can be used to map the impact on operation of different types of control, the time of day and the available wind speed and it is not limited only for DFIG. The resu…
Alternative Energy Policy for Mitigating the Asynchrony of the Wind-Power Industry’s Supply Chain in Brazil
2018
High dependency on hydroelectricity has revealed drawbacks in the security of power supplies as a consequence of the climate variability in South America. Under these conditions, Brazil is starting to consider alternative renewable sources for energy production, seeking to avoid periods of scarcity while also promoting clean technologies in its electricity market. Since 2004, wind power has shown a significant rise in terms of installed capacity in this country. Despite increases in wind-power units, Brazil suffers from delays in setting up its transmission infrastructure, which affects the performance of the wind-power supply chain. This chapter presents a simulation model that helps asses…