170,029 research outputs found
Diventare è ricordare: una versione indiana dell’anamnesi
No full textCom’è noto, la dottrina platonica dell’anamnesi intende fornire una soluzione a un difficile problema epistemologico: come si può imparare ciò che ancora non si conosce? Infatti, se non lo si conosce per nulla, neppure ci si può proporre di impararlo. La risposta del Menone è che conoscere è in effetti ricordare quanto già in qualche modo sappiamo ma avevamo dimenticato. Dal canto suo, un gruppo di aforismi del Kaivalya Pāda degli Yoga Sūtra ci presenta una curiosa variante della medesima dottrina, intesa questa volta ad affrontare un problema “esistenziale” tipicamente indiano, eppure in qualche modo simile: come si può diventare (per effetto del karman) ciò che non si era? Chi non era nella scorsa vita una vacca neppure ne possedeva le competenze (per esempio, cibarsi d’erba); come può dunque assumerne il modo di essere nella vita ventura? La risposta degli Yoga Sūtra è analoga a quella del Menone: assumere un modo di essere è in effetti ridiventare ciò che già siamo stati ma di cui non serbiamo piú memoria consapevole.As is well known, the Platonic doctrine of anamnesis aims to provide a solution to a difficult epistemological problem: how can one learn what he still ignores? for, if he utterly ignores it, he cannot even purpose to learn it. The answer of the Meno is that learning actually is remembering what we used to know, but have forgotten. For its part, the Yogasūtra in a group of aphorisms of the Kaivalya Pāda confronts us with what seems to amount to an intriguing variant of the same doctrine, this time meant to cope with an “existential” problem typically Indian, yet in a way similar: how can one become (as a consequence of karman) what he was not? He who was not a cow in the former life did not possess her competences either (e.g. relishing pasture); hence how can he assume her mode of being in the next life? Patañjali’s answer is similar to Plato’s: taking on a mode of being actually is becoming once again what we had already been, although we do not consciously remember it
Jung e l’India: luci e ombre di un incontro
No full textJung visited India just once, in 1938, bringing back mixed feelings from the encounter, which he put down in two papers: “The dreamlike world of India” (1939) and “What India can teach us” (1939); to which must be added the memoir recorded in Aniela Jaffé’s “Erinnerungen, Träume und Gedanken von C. G. Jung”. What he relates about that voyage offers us a precious clue to understand not only the mood in which he undertook it, but also the conditions and the limits of his general attitude towards India
Optimal Non-parametric Estimation of 1/f Noise Spectrum in Semiconductor Device
No full textIn this paper, we discuss the optimal nonparametric estimation of 1/f noise in MOSFET devices. We adopt a simple experimental procedure to evaluate the performance of different methods for the spectrum estimation. In particular, we analyze the variance of the spectrum in the case of averaged periodograms, according to Bartlett and Welch methods. The influence of the adopted window function and of the overlap between segments is investigated. Finally, an optimal power spectrum estimation is identified, allowing to minimize the dispersion of the spectrum
TCAD numerical simulation of Metal Wrap Through solar cell2013 IEEE International Conference of Electron Devices and Solid-state Circuits
No full textMetal Wrap Through (MWT) solar cell represents a type of back-contact solution which allows to improve the efficiency of conventional silicon photovoltaic (PV) cells. In this work we use TCAD numerical simulations to investigate the performance of MWT cells. The impact of critical parameters, such as the resistance of VIA, the separation region and the busbar width is analyzed. The study of the main figures of merit under illumination and in dark condition allows to understand the physical mechanisms which limit the conversion efficiency
Oxygen evolution on Co3O4 and Li-doped Co3O4 coated electrodes in an alkaline solution
No full textThe oxygen evolution reaction "OER# was investigated at 59>C in 04 wt) NaOH solution on Co2O3\ Li!doped Co2O3 and perovskite!type oxide "LaNiO2# electrodes[ Cobalt and Li!doped cobalt oxides were obtained by di}erent preparation techniques and were applied to chemically!pickled nickel plates[ The obtained phases were structurally characterized by X!ray powder di}raction[ The electrodes were subjected to electrochemical measurements\ before and after elec! trochemical ageing "10 days\ 049 mA cm−1#[ The correlation between the coating preparations and their electrocatalytic activity was investigated[ The e.ciency of the studied electrodes seems to depend on the preparation method[ Two Tafel slopes for the OER were observed in most cases[ This behaviour was interpreted on the basis of a change in the valence state of the surface oxide[ Þ 0888 International Association for Hydrogen Energy[ Published by Elsevier Science Ltd[ All rights reserved
Surgical management of egg retention in a reproductive Bearded Vulture (Gypaetus barbatus): signs, diagnosis, treatment, and follow up
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INSTRUMENTATION DESIGN FOR CROSS-CORRELATION MEASUREMENTS BETWEEN GATE AND DRAIN LOW FREQUENCY NOISE IN MOSFETS
No full textNumerical simulation and modeling of thermal transient in silicon power devices
No full textThe description of thermal non-uniformity in large area power MOSFETs requires the modeling of a thermal network to account for the thermal interaction between adjacent devices. In this work we propose a methodology to derive an equivalent thermal network which is able to predict the thermal transient as a function of the longitudinal distance from the heat source. The thermal resistances and capacitances are calculated by assuming a cylindrical propagation of the heat. Electro-thermal numerical simulations are performed in order to study the heat propagation inside the device and to verify the accuracy of the proposed model
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