Search results for "Teoria"
showing 10 items of 2647 documents
Thiolate Adsorption on Au(hkl) and Equilibrium Shape of Large Thiolate-covered Gold Nanoparticles
2013
The adsorption of thiolates on Au surfaces employing density-functional-theory calculations has been studied. The dissociative chemisorption of dimethyl disulfide (CH3S−SCH3) on 14 different Au(hkl) is used as a model system. We discuss trends on adsorption energies, bond lengths, and bond angles as the surface structure changes, considering every possible Au(hkl) with h, k, l ≤ 3 plus the kinked Au(421). Methanethiolate (CH3S-) prefers adsorption on bridge sites on all surfaces considered; hollow and on top sites are highly unfavourable. The interface tensions for Au(hkl)-thiolate interfaces is determined at low coverage. Using the interface tensions in a Wulff construction method, we cons…
A Non-world : Chinese Perceptions of the Western International Order
2019
As the West struggles, China, economically and politically stable, has increased its criticism toward the Western-led international order. According to Chinese arguments, the ongoing decade has demonstrated that the Western liberal international order is no more capable of solving the troubles of the globalizing world. It is as if the Western political imagination has run out of steam and it is now the responsibility of China to take the lead in stabilizing the world. On the side of the official statements, Chinese theorists of world politics are envisioning a new alternative world order, which would be based on a historical, sinocentric system that was in place in East Asia for thousands o…
Tianxia, Kiina ja hegemonisen vakauden teoria
2020
Kiinassa on 2000-luvulla rakennettu kiinalaista maailmanpolitiikan teoriaa, joka ammentaa lännen sijaan Kiinan omasta historiasta ja älyllisestä traditiosta. Yksi eniten huomiota herättäneistä teoreettisista aloitteista on niin kutsuttu tianxia-teoria, jonka mukaan nykyinen kansallisvaltioihin pohjautuva kansainvälinen järjestelmä tulisi korvata Kiinan historiasta löytyvän tianxia-mallin mukaisella keskuskjohdetulla maailmanvaltiolla. Artikkeli vertaa tianxia-teoriaa hegemonisen vakauden teorian erilaisiin variantteihin ja esittää, että lähemmin tarkasteltuna tianxia-teorian ajatukset ovat varsin samankaltaisia jo vakiintuneiden teorioiden ajatusten kanssa. Tianxia theory is one of the most…
Chreod.
2020
The concept of chreod was introduced in 1957 by the English theoretical biologist Conrad Hal Waddington (cf. Waddington: 1957; Galperin: 2008). From a linguistic point of view, the word “chreod” is a neologism, or, more precisely, a compound formed by the combination of two Greek words: the verb chre- (“it is necessary, must”) and the substantive -hodos (“way, road”). Therefore, it means literally “obliged pathway” (cf. Fabris 2018: 252, n. 6). Of course, such an etymology covers only a little bit of the semantic repertoire deployed by chreod. But, it is however true that some aspects of the biology of living systems can be described in these terms. Indeed, at the most general level, the id…
Hidden and self-excited attractors in radiophysical and biophysical models
2017
One of the central tasks of investigation of dynamical systems is the problem of analysis of the steady (limiting) behavior of the system after the completion of transient processes, i.e., the problem of localization and analysis of attractors (bounded sets of states of the system to which the system tends after transient processes from close initial states). Transition of the system with initial conditions from the vicinity of stationary state to an attractor corresponds to the case of a self-excited attractor. However, there exist attractors of another type: hidden attractors are attractors with the basin of attraction which does not have intersection with a small neighborhoods of any equ…
Essere uno: il cinema ripensa l'umano
2012
Il saggio ripercorre le pagine di alcune delle più importanti teorie cinematografiche delle origini, per mostrare come il cinema sia stato concepito - sin dai suoi primi anni di vita - come uno strumento di indagine utile alla comprensione dello statuto dell'umano
Figure del desiderio. I racconti della luna pallida d'agosto di Mizoguchi
2009
Il saggio si occupa di uno dei capolavori del cinema giapponese: I racconti della luna pallida
Optimized Multipactor-Resistant Wedge-Shaped Waveguide Bandpass Filters
2013
[EN] Wedge-shaped waveguides present a certain advantage with respect to rectangular waveguides regarding their resistance to multipactor discharges. In this paper, the optimal configuration for the wedge geometry is investigated based on theoretical results, on a precise multipactor prediction tool, and on previous experience. In addition, design rules are presented, which allow us to achieve for wedge-shaped filters electrical performances comparable to the ones of rectangular waveguide filters, while at the same time improving the multipactor-free power range. As a proof of concept, two three-pole bandpass filters with equivalent electrical characteristic of 150-MHz bandwidth, centered a…
Supramolecular Chirogenesis in Bis-Porphyrin: Crystallographic Structure and CD Spectra for a Complex with a Chiral Guanidine Derivative
2021
The complexation of (3aR,7aR)-N-(3,5-bis(trifluoromethyl)phenyl)octahydro-2H-benzo[d]imidazol-2-imine (BTI), as a guest, to ethane-bridged bis(zinc octaethylporphyrin), bis(ZnOEP), as a host, has been studied by means of ultraviolet-visible (UV-Vis) and circular dichroism (CD) absorption spectroscopies, single crystal X-ray diffraction, and computational simulation. The formation of 1:2 host-guest complex was established by X-ray diffraction and UV-Vis titration studies. Two guest BTI molecules are located at the opposite sides of two porphyrin subunits of bis(ZnOEP) host, which is resting in the anti-conformation. The complexation of BTI molecules proceed via coordination of the imine nitr…
Figure di città. Spazi urbani e discorsi sociali
2013
Questo libro dialoga con le altre discipline che nell’epoca contemporanea indagano sui problemi scottanti della metropoli e della megalopoli, dello sprawl urbano e degli slums, delle reti mediatiche e della sfera immaginaria che esse generano. E nello stesso tempo prova a individuare i momenti chiave – e i punti critici – che sono via via emersi negli studi semiotici sulla città. Lo scopo del libro è appunto quello di dissodare un campo entro cui si innestano e proliferano una serie di figure di città, immagini e segni d’ogni tipo che, nel loro intreccio, vanno a costituire lo spessore della nostra vita quotidiana. Sorvegliato da una intelaiatura teorica tanto rigorosa quanto dinamica, lo s…