Search results for "Semi"
showing 10 items of 3894 documents
Philology within the framework of Semiotic Textology. János S. Petőfi’s scientific legacy II
2019
This paper is addressed to linguists and, ideally, to philologists and literary critics. János S. Petőfi formulated his Semiotic Textology within a context of Macro-Disciplines (MD) and within an interdisciplinary context (ID). Petőfi did not give much information about the relationship between Semiotic Textology and other disciplines, such as Philology and Literary Criticism. Textual Linguistics is chronologically the first among the disciplines participating in Natural Text Processing as sub-procedure of Natural Language Processing. On the other hand, Literary Criticism is the last discipline of the procedure, because it expresses artistic evaluation. The connections between the disciplin…
The Effect of Electronic Properties of Anodized and Hard Anodized Ti and Ti6Al4V on Their Reactivity in Simulated Body Fluid
2022
The electronic properties of barrier and porous layers on Ti and Ti6Al4V were studied. Barrier anodic oxides grown to 40 V on Ti and on Ti6Al4V are both n-type semiconductors with a band gap of 3.3 eV and 3.4 eV respectively, in agreement with the formation of amorphous TiO2. Anodizing to 200 V at 20 mA cm−2 in calcium acetate and β-glycerol phosphate disodium pentahydrate leads to the formation of Ca and P containing porous films with a photoelectrochemical behaviour dependent on the metallic substrate. A band gap of 3.2 eV and the flat band potential of −0.5 V vs Ag/AgCl were measured for the porous oxide on Ti, while optical transitions at 2.15 eV and a significantly more positive flat b…
Oggi viene male questo celeste. Paolo Conte e il dilettantismo
2022
The figure of the amateur is emerging on the contemporary semiosphere, both in terms of scientific research and in the artistic domain. In this paper we discuss this phenomenon from the textual analysis of a song by Paolo Conte. We thus deal with the relations of mutual inter semiotic translation between music and image by showing how, in Conte, a musical compo sition can, at the level of utterance, become the theory of a given pictorial making and, at the level of enunciation, be transposed into a drawing that predicates it by its own expressive and semantic means. But also how, in the reverse sense, a certain form of life of the amateur visual artist can be transposed into a precise devic…
Progressive Era Racism and its (Jewish) Discontents
2018
This work analyzes the contribution to the debates on labor and immigration of a group of Jewish academicians and reformers who, during the second half of the Progressive Era, explicitly took a stance against the racialist and eugenic rhetoric of the period. This group includes first-rank economists like Edwin R. A. Seligman, Jacob H. Hollander, and Emanuel A. Goldenweiser; influential field specialists such as Isaac A. Hourwich and Isaac M. Rubinow; and relatively less known figures like Max J. Kohler and Samuel K. Joseph. By focusing on the voices of these dissenters, the work enriches the emerging picture of Progressive Era eugenic and racial thought
Finite-size scaling of charge carrier mobility in disordered organic semiconductors
2016
Simulations of charge transport in amorphous semiconductors are often performed in microscopically sized systems. As a result, charge carrier mobilities become system-size dependent. We propose a simple method for extrapolating a macroscopic, nondispersive mobility from the system-size dependence of a microscopic one. The method is validated against a temperature-based extrapolation [A. Lukyanov and D. Andrienko, Phys. Rev. B 82, 193202 (2010)]. In addition, we provide an analytic estimate of system sizes required to perform nondispersive charge transport simulations in systems with finite charge carrier density, derived from a truncated Gaussian distribution. This estimate is not limited t…
Characterization of Thin Passive Film-Electrolyte Junctions. The Amorphous Semiconductor (a-SC) Schottky Barrier Approach.
2017
A detailed study of the electronic properties of thin (< 20 nm) anodic TiO2 potentiostatically grown on titanium in two different solutions is presented. The results show that the nature of the anodizing solution affects the electronic properties of the anodic film and in particular the density of electronic state (DOS) distribution. Different DOS were derived from the experimental data analyzed according to the theory of amorphous semiconductor (a-SC) Schottky barrier. It is shown that the usual non-linear and frequency dependent Mott-Schottky plots are in agreement with expected theoretical behaviour of a-SC Schottky barrier. It is shown the importance of the DOS distribution in determini…
<title>Holographic properties of dielectric crystals and amorphous semiconductor films</title>
2001
Holographic recording properties and mechanisms are analyzed and compared in dielectric electrooptic crystals (EOC), dielectric colored alkali halide crystals (AHC) and amorphous semiconductor films (ASF) basing on author's investigations as well as on the literature data. Holographic photosensitivity parameters are introduced enabling the characterization of the recording mechanism efficiency independently of the particular optical and geometrical sample parameters, and allowing also for recording optimization. Ultimate specific recording energies for EOC, AHC and ASF are theoretically estimated. It is concluded that the ultimate recording energy for both crystalline and amorphous material…
Correlated barrier hopping in NiO films
1991
The ac conduction in NiO films has been investigated in the frequency range 10 Hz < v < 10^9 Hz and at temperatures between 10 and 300 K. The frequency and the temperature dependence of the electrical conductivity can be consistently explained within a model developed for the mechanism of charge transfer in amorphous semiconductors which proposes that charge carriers hop over potential barriers between defect sites, the height of the barriers being correlated with the intersite separation.
High-efficiency silicon-compatible photodetectors based on Ge quantum dots
2011
We report on high responsivity, broadband metal/insulator/semiconductor photodetectors with amorphous Ge quantum dots (a-Ge QDs) as the active absorbers embedded in a silicon dioxide matrix. Spectral responsivities between 1-4 A/W are achieved in the 500-900 nm wavelength range with internal quantum efficiencies (IQEs) as high as ∼700%. We investigate the role of a-Ge QDs in the photocurrent generation and explain the high IQE as a result of transport mechanisms via photoexcited QDs. These results suggest that a-Ge QDs are promising for high-performance integrated optoelectronic devices that are fully compatible with silicon technology in terms of fabrication and thermal budget. © 2011 Amer…
¿De qué hablamos cuando hablamos de análisis del discurso? Contra-hegemonía, populismo y mediaticismo en el caso de Podemos
2015
En su tarea de desontologización del marxismo y de reivindicación de una nueva estrategia hegemónica para la izquierda, Ernesto Laclau y Chantal Mouffe erigen un paradigma epistemológico que podríamos llamar retórica general, cuya metodología de investigación de las dinámicas antagónicas ha dado en denominarse, a su vez, Análisis del Discurso. El problema que pretendemos abordar en nuestro artículo es que este análisis, al ser su fin explícitamente estratégico y orientado a la praxis política, acaba muchas veces convertido en un álgebra en la que la pretensión de predicción algorítmica desborda el campo de la heurística o de la hermenéutica, en pro de una hipostatización del éxito político.…