Search results for "version"
showing 10 items of 1591 documents
Surface versus bulk composition of a phosphate glass
1994
Transmission and conversion electron Mossbauer spectroscopy as well as photoelectron spectroscopy were applied to study alterations of the surface layer of an iron containing industrial phosphate glass as compared with its bulk. In the surface layer, after polishing and exposure to ambient atmosphere, Fe 2+ is partially oxidized to Fe 3+ . This oxidation, however, does not increase the O/P ratio in this layer, because it goes along with a strong leaching of network modifiers. This leaching leads to a net decrease of the O/P ratio because it overcompensates the relative oxygen increase by Fe 2+ oxidation and by uptake of water
Tēlu raksturojums un galvenās tēmas Džeinas Ostinas romānā „Lepnums un aizspriedumi” un tā ekranizācijā
2017
Bakalaura darbs atspoguļo angļu rakstnieces Džeinas Ostinas noveles “Lepnums un aizspriedumi” (1813) un angļu kinorežisora Džo Raita filmas “Lepnums un aizspriedumi” (2005) analīzi. Pētījuma galvenais akcents ir vērsts uz apskatu par līdzībām un atšķirībām novelē un tās ekranizācijas tēlu raksturošanā un svarīgākajās tēmās, kuras ikdienas lasītājs vai skatītājs nevar pamanīt. Pētījuma metodes ietver tēlu raksturošanu, tēmu un filmu teorētisko materiālu, kā arī izvēlētās noveles un tās ekranizējuma analīzi. Pēc pētījuma veikšanas Bakalaura darba autors nonāk pie slēdziena, ka pēc Džeinas Ostinas noveles “Lepnums un aizspriedumi” Džo Raita režisētā filma “Lepnums un aizspriedumi” meistarīgi a…
The whip and the Bible : punishment versus internalization
2021
First published online: 27 August 2021 A variety of experimental and empirical research indicate that prosocial behavior is important for economic success. There are two sources of prosocial behavior: incentives and preferences. The latter, the willingness of individuals to “do their bit” for the group, we refer to as internalization, because we view it as something that a group can influence by appropriate investment. This implies that there is a trade-off between using incentives and internalization to encourage prosocial behavior. By examining this trade-off we shed light on the connection between social norms observed inside the laboratory and those observed outside in the field. For ex…
Risk aversion connectedness in five European countries
2018
Abstract In this paper we compute an aggregate index of risk aversion and indices of vulnerability and the contribution to systemic risk aversion for five European countries. The variance risk premium proxies risk aversion. The contribution to the literature is twofold. First, this is the first study estimating not only the common component, but also indices of directional connectedness among variance risk premia. Second, it is the first to estimate the interconnections by means of a FIVAR model, in order to account for long memory. Our analysis indicates measures of total and directional connectedness unlike those that would be obtained with the use of a short memory VAR. These differences…
Design and Validation of a Dynamic Inductive Power Transfer System for EV Battery Charging
2022
In this paper, a Dynamic Resonant Inductive Power Transfer (DRIPT) System for the Electric Vehicle (EV) battery charging is proposed. In particular, the aim of the work is the general design of the whole system and its validation, with particular attention to the power electronic converters and their control. For the transmitter side, a DC/AC converter is used. It is controlled through the phase-shift technique and supervised by a Zero Phase Angle detection algorithm to ensure the maximum power transfer. For the receiver side, a double conversion stage, consisting of a diode rectifier and a controlled buck converter, is provided. The system is then simulated to verify its proper design.
Wireless Power Transfer for Electric Vehicles: System Design Approach and Energy Storage Characterization
2023
This thesis is the result of the research work carried out as part of the PhD course in Energy and Information Technology between November 2019 and January 2023 at the University of Palermo jointly with the University of Lisbon. The research project has been focused on wireless charging systems for electric vehicles. A wide-ranging analysis was conducted on the topic, with a particular focus on the design aspects of these systems. This thesis, a summary of the work carried out over the previous three years, is organized into two parts, identifying the macro research activities into which the project was been divided. The first part is focused on the design approach of the Wireless Power Tra…
Viaje o turismo a finales del siglo XIX y principios del XX
2020
espanolLos relatos de los viajeros franceses del siglo xix a Espana y su vision exotica del pais son bien conocidos. Muchos fueron los que dejaron plasmadas sus impresiones sobre el pais, desde autores tan populares como Georges Sand y su obra Un hiver a Majorque (1855), traducida en 1902, hasta la ginebrina Valerie de Gasparin. En 1869, se publico en Paris una de sus obras A travers les Espagnes, cuya version en espanol se titulo Paseo por Espana (Valencia, 1875). La traduccion de esta obra constituye el punto de partida de nuestro articulo, pues enlaza directamente con la prensa como vehiculo de informacion “turistica” sobre las diferentes ciudades de Espana. En este trabajo expondremos l…
Modification of the immune response against hepatitis B virus by the human immunodeficiency virus.
1989
Hepatitis B virus and the human immunodeficiency virus are similarly transmitted. Individuals with preexisting HIV infection have a higher chance to become HBsAg carriers than do anti-HIV negative persons. Cytotoxic T cells with specificity for HBcAg, that are under the control of HBcAg-specific helper T cells, are responsible for liver injury. There is good evidence that HIV infection lowers inflammatory activity, is associated with milder liver histology, high levels of viral replication and low seroconversion rates. In addition interferon alpha therapy is less effective in anti-HIV positive subjects. The immune response against HBsAg is helper T-cell dependent and vaccination against hep…
Hepatitis B vaccination and interleukin 2 receptor expression in chronic renal failure
1990
Hepatitis B vaccination and interleukin-2 receptor expression in chronic renal failure. Only 50 to 60% of dialysis patients develop anti-HBs antibodies following hepatitis b vaccination. The nonre-sponder state correlates with impaired monocyte function, decreased interleukin-2 (IL-2) production of T cells, and an upregulation of the IL-2 receptor system. In the present study we examined anti-HBs production after hepatitis B vaccination and the in vitro expression of IL-2 receptors in nondialyzed patients with various degrees of chronic renal failure. Forty-four patients with impaired renal function were immunized with 20 µg recombinant hepatitis B vaccine and boostered after one and six mo…
Palermo: Virtual urban reconfiguration of some ancient squares and quarters
2013
The representation area is nowaday called upon to face new challenges for new computer technologies that have developed over the last few years. Visual communication and multimedia language experienced a radical change: representation and visualization, thought and image are based on the branch of communication and therefore on the trasmission of knowledge that cannot be separated from the interdisciplinarity. Digital imagery challenges more and more analog imagery, creating a scene that is independent from the constructed reality and sometimes reaching to overlap and merge with it: therefore the representation is no longer just a repetition of the real, but becomes itself an autonomous rea…