1,720,983 research outputs found
Il look del populismo italiano. La comunicazione non verbale di Matteo Salvini | The Look of the Italian Populism. Matteo Salvini’s Non-Verbal Communication
Full text linkMatteo Salvini is the leader of one of the Italian populist parties. In this article I analyse his non-verbal communication, in particular his look. In the frame of interpretive semiotics, I will assume as the starting point the surprising and largely phatic communication that, as usual, is conveyed by the media. A typology of phatic communication is proposed. Salvini is notable for his lack of originality and his very plain, homeboy look. His outfit’s phatic traits are analysed, like wearing firemen and police uniforms, and slogan t-shirt and sweatshirts. From such a public image it is possible to draw inferences about the values and pragmatic meanings that the general audience can build, and the possible reactions. I also propose some general remarks about new populism
Talking to Oneself. A Semiotic Analysis of Donald Trump’s Hair Style
No full textThe article presents a semiotic analysis of Donald Trump’s hairstyle.
The exposition follows the inquiry step by step. Firstly the sample to
analyse is established. Any single text (verbal or visual) is linked to
the correspondent web resource so that the reader can compare
her/his view with the author’s. Incidentally, an explanation of how a
hairdo can be considered a text is given, in the frame of the semiotic
studies of clothing started by R. Barthes. Accordingly, hairdressing
is an act of dressing, which, in its turn, is a part of self-presentation
behaviour. The first level of the text, the expression, is then analysed,
establishing how Trump’s hairdressing is technically obtained. The
rest of the work is devoted to the most important semiotic element,
namely, the content or, following the pragmatic approach – adopted
by the author – interpretation. The interpretive model used to describe
the particular hairdo of the American President is that of fictional
narrations, resulting from a combination of the semiotics of text and
of Goffman’s theory of social role playing. Social narrations are explained
as well as their relations to social hierarchies. The first result
is that Donald Trump’s hairstyle is an idiolect, that is, a language spoken
only by one individual, and an aesthetic one, to be precise. To
find the specific interpretant of this particular self-presentation choice
we must move on to the metasemiotic level: the meaning of using a
language. Here a hypothesis emerges: Trump’s hair style communicates
a sort of self-presentation autism. The last step of the analysis
consists in the attempt at developing the pragmatic consequences of
the text. An attempt, of course, to be tested by future research
Senso, progett/analisi, design e semiocritica
No full textL'articolo cerca di comprendere come gli strumenti socio-semiotici possano essere utilizzati nella progettazione e nell'analisi critica dei progetti nell'ambito del design
Magnesium Tetraarylporphyrin Tweezer: a CD-Sensitive Host for Absolute Configurational Assignment of alpha-Chiral Carboxylic Acids
No full textA protocol to determine the absolute configuration of α-chiral carboxylic acids based on a modified circular dichroic (CD) exciton chirality method has been developed. The protocol relies on a host-guest complexation mechanism: the chiral substrates are derivatized to give bifunctional amide conjugates ("guests") that form complexes with a dimeric magnesium porphyrin host, Mg-T (T stands for "tweezer") that acts as a "receptor". The two porphyrins in the complex adopt a preferred helicity dictated by the substituents at the chiral center in accordance with their steric sizes (assigned on the basis of conformational energy A-values) and, consequently, with the absolute configuration of the substrates under investigation. This chiroptical method, verified with a variety of chiral substrates, has been demonstrated to be reliable and generally applicable, including natural products with complex structures. Molecular modeling, NMR, and FTIR experiments of selected host-guest complexes revealed the mode of ligation of the substrates to the magnesium porphyrin species and led to clarification of the structure of the complex. When oxygen functionalities were directly attached to the chiral center, the signs of the CD couplets were opposite to those predicted on the basis of steric size. NMR and molecular modeling experiments indicated that this apparent inconsistency was due to conformational characteristics of the guest molecules. The stereochemical analysis is shown to be a sensitive technique, not only for the determination of absolute configurations of substrates but also for elucidation of their solution conformations
CD-sensitive Zn-porphyrin tweezer host-guest complex; Part 1. OPLS computational approach for predicting preferred interporphyrin helicity
No full textThis article describes a computational study on dimeric zinc porphyrin tweezer complexes with primary/secondary amines and secondary alcohols that validates the use of Optimized Potential for Liquid Simulations (OPLS-2005) as the lead computational choice for assisting the tweezer methodology in the absolute configurational assignment of organic compounds. A supramolecular, microscale approach known as the tweezer method has been widely applied in the past decade for determining the absolute configuration of chiral substrates that are difficult to study by other readily available methods. The method relies on a host/guest complexation mechanism between a porphyrin tweezer moiety and a substrate, after its conversion into a bidentate conjugate. The formation of 1:1 complexes is a stereodifferentiating process: upon complexation, the originally achiral tweezer adopts a preferential interporphyrin helicity, dictated by the absolute configuration of the chiral substrate. By correctly predicting the sign of the interporphyrin helicity in the complex, OPLS-2005 provides a correlation between the observed circular dichroism (CD) signal and the absolute configuration of the substrate. It also offers a great degree of insight into the structural factors responsible for chiral recognition and the amplitude of exciton couplets. Moreover, the preferential binding sites between the Zn-tweezer and secondary amine conjugates were revealed by using the new computational approach
The chirality of the cholesteric phase of DNA and G-wires: its connection to their molecular structures
No full textWhile the handedness of the cholesteric phases formed by assembled guanosine derivatives (G-wires) follow the correlation right-handed helices --> right-handed cholesterics (left-handed --> left-handed), the cholesteric phase formed by B-DNA (right-handed helix) is left-handed. This apparent discrepancy is overcome by considering pitch (p) variations with temperature. Plots of p(-1) versus T-1 have, in fact, the same trend (positive intercept and negative slope) in the case of right-handed G-wires and B-DNA, while for the left-handed G-wire of deoxyguanosine monophosphate (dGMP), the opposite behavior is observed (negative intercept and positive slope). Therefore, the relation between molecular handedness and cholesteric helicity cannot, in general, be assessed by using measurements based on a single temperature; hence the temperature variation of the cholesteric parameters should be investigated. In all cases there is no remarkable salt effect on the cholesteric parameters
Storie dentro fotografie
Full text linkLe arti hanno la capacità di proiettarci in una «situazione di straniamento», secondo l’insegnamento dei formalisti russi. Oppure, mettono in atto il “gioco del fantasticare” di Peirce, che apre le porte alla capacità di inventare e di pensare mondi nuovi e possibili. Possiamo quindi guardare le fotografie che documentano la nostra storia quotidiana e sociale attraverso uno sguardo abduttivo, capace di osservare ciò che si trova oltre le mere apparenze, esercizio di osservazione acuta e interpretante capace di superare il «guardare pigro e viziato da abiti ereditati»
Probing molecular chirality by CD-sensitive dimeric metalloporphyrin hosts
No full textThis feature article reviews dimeric metalloporphyrin hosts employed as chirality probes in chiral recognition processes involving synthetic compounds and natural products. Upon formation of a chiral host–guest supramolecular complex between an achiral bis-metalloporphyrin derivative and a chiral non-racemic guest, a CD response occurs in the porphyrin spectral region, which is diagnostic of the guest’s absolute configuration. Several bis-porphyrin hosts used in the stereochemical investigation of organic compounds are described and the scope of their application as chirality probes critically assessed. The review encompasses the description of structural features of the host–guest complexes, the nature of the chirality transfer mechanism and the practical application in solving stereochemical problems. In particular, with reference to the method based on bis-porphyrin tweezers, we describe recent advances based on the use of molecular modeling, which have broadened the applicability of the tweezer methodology and allowed extraction of deeper structural information contained in the experimental CD data
Favorire la formazione di sistemi e processi creativi: alcuni appunti
No full textGli studi sulla creatività, l'inventiva, la scoperta scientifica (breve introduzione).
Imprevedibilità della soluzione creativa.
L'approccio probabilistico. (i concorsi internazionali di design, i team di ricerca nei grandi laboratori).
Il progetto come semiotica della creatività.
Creatività nello sfruttamento economico delle idee innovative.
Perché un'idea innovativa o creativa possa trasformarsi in un investimento è necessario che il terreno sociale ed economico sia fertile e ricettivo.
Un sistema di investimento nell'ICC non si può certo costruire con la prudente ma miope ottica con la quale si eroga un mutuo casa.
Ascoltare il nuovo e creare il nuovo sono infatti la stessa cosa, quando ci si sa collocare su quella che con metafora pregnante chiamiamo la cresta dell'onda
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