Search results for "mirror"
showing 10 items of 202 documents
New high-sensitivity searches for neutrons converting into antineutrons and/or sterile neutrons at the HIBEAM/NNBAR experiment at the European Spalla…
2021
Abstract The violation of baryon number, B , is an essential ingredient for the preferential creation of matter over antimatter needed to account for the observed baryon asymmetry in the Universe. However, such a process has yet to be experimentally observed. The HIBEAM/NNBAR program is a proposed two-stage experiment at the European Spallation Source to search for baryon number violation. The program will include high-sensitivity searches for processes that violate baryon number by one or two units: free neutron–antineutron oscillation ( n → n ̄ ) via mixing, neutron–antineutron oscillation via regeneration from a sterile neutron state ( n → [ n ′ , n ̄ ′ ] → n ̄ ), and neutron disappearan…
Precise measurements of half-lives and branching ratios for the ββ mirror transitions in the decay of 23Mg and 27Si
2017
Half-lives and branching ratios for the two mirror ββ decays of 23Mg and 27Si have been measured at the University of Jyväskylä with the IGISOL facility. The results obtained, T1/2=11.303(3)T1/2=11.303(3) s and T1/2=4.112(2)T1/2=4.112(2) s for the half-lives of 23Mg and 27Si , respectively, are 7 and 8 times more precise than the averages of previous measurements. The values obtained for the super-allowed branching ratios of 23Mg and 27Si are B.R.=92.18(8)%B.R.=92.18(8)% and B.R.=99.74(2)%B.R.=99.74(2)% , respectively. The result for 23Mg is three times more precise than the average of the previous measurements, while for 27Si the precision has not been improved, the average of the previous…
Disabilità visiva e neuroni specchio
2009
Il seguente lavoro ha come obiettivo quello indagare, il possibile coinvolgimento del sistema dei neuroni specchio nella disabilità visiva, cercando di analizzare, in particolare, come il soggetto non vedente possa comprendere e conoscere l’azione degli altri privato dal corpus di informazioni provenienti dal canale visivo. L’ipotesi da verificare è se nei soggetti con disabilità visiva e nei soggetti con sviluppo tipico venga messo in gioco e con quale modalità, lo stesso sistema di neuroni specchio unitario (visivo-uditivo) per il riconoscimento dell’azione. Inoltre, lo studio dovrebbe consentire di verificare se la disabilità visiva ad esordio precoce (congenita) è in grado di aumentare …
Reply to “Mirror Symmetry Breaking” of the Centrosymmetric CaCO3 Crystals with Amino Acids
2008
Orientation-Dependent Handedness of Chiral Plasmons on Nanosphere Dimers: How to Turn a Right Hand into a Left Hand
2016
Optical activity, which is used as a discriminator of chiral enantiomers, is demonstrated to be orientation dependent on individual, and nominally achiral, plasmonic nanosphere dimers. Through measurements of their giant Raman optical activity, we demonstrate that L/R-handed enantiomers can be continuously turned into their R/L-handed mirror images without passing through an achiral state. The primitive uniaxial multipolar response, with demonstrable broken parity and time reversal symmetry, reproduces the observations as resonant Raman scattering on plasmons that carry angular momentum. The analysis underscores that chirality does not have a quantitative continuous measure and recognizes t…
L’ADULTO COME SPECCHIO. MODALITÀ COMUNICATIVE E APPRENDIMENTO
2021
Numerose ricerche sull’infanzia condotte a partire dal secolo scorso, hanno mostrato come i bambini, fin dai primi mesi di vita, siano attivi e propositivi nella interazione con gli altri esseri umani. In una prospettiva educativa, di promozione dei processi di apprendimento e di sostegno alla costruzione di una immagine di sé positiva e fiduciosa nelle proprie potenzialità, sono di grande importanza le modalità comunicative e relazionali degli adulti significativi. A tali modalità farò riferimento nel mio contributo, soffermandomi sul rispecchiamento verbale e non verbale, nelle sue diverse forme, approfondendone le ragioni teoriche e metodologiche e riflettendo su come possa attuarsi una …
The Modifying Mirror
2023
Abstract This chapter compares music listening with the infant’s experience of care. Several scholars have argued that music can be used for scaffolding one’s self-experience. Developmental psychologists, in turn, maintain a wide consensus over the claim that, in early interaction, the attuned caregiver supports and modifies the infant’s self-experience in various ways. The chapter brings these phenomena together, illustrating how the examination of the early self/other relation can teach us something important concerning the listener/music relation. The first section elaborates on the scaffolding function of music and clarifies two ambiguities haunting the debate. The second section reloca…
Spectroscopic signatures for planar equilibrium geometries in methyl-substituted oligothiophenes
2009
In recent studies it was demonstrated that temperature-dependent optical spectroscopy is a valuable tool for revealing the differences in the geometries of flexible molecules like oligothiophenes (OTs) in the ground (S0) and first excited (S1) electronic states, by examining the symmetry relations between the absorption and emission spectra: while at low temperature the spectra show mirror symmetry, pointing to planar geometries in S0 and S1, the symmetry relation breaks down at ambient temperature due to thermal population of torsional modes. In the present joint spectroscopic and theoretical study, we demonstrate that this behavior is also observed for di- and tetramethyl-substituted OTs,…
Action simulation in the human brain: Twelve questions
2013
Although the idea of action simulation is nowadays popular in cognitive science, neuroscience and robotics, many aspects of the simulative processes remain unclear from empirical, computational, and neural perspectives. In the first part of the article, we provide a critical review and assessment of action simulation theories advanced so far in the wider literature of embodied and motor cognition. We focus our analysis on twelve key questions, and discuss them in the context of human and (occasionally) primate studies. In the second part of the article, we describe an integrative neuro-computational account of action simulation, which links the neural substrate (as revealed in neuroimaging …
La ricerca sul campo come extraordinary experience. Una proposta di ricerca multidisciplinare
2010
Reflexive criticism focused its attention on writing texts, neglecting the experience of observation, on which the practice of field research is built, and it rarely paid attention to the experience of researchers. The triple relationship established between the anthropologist, the world and the “other” reveals the deep interrelation between the three levels of this “complex isotopy”. This essay addresses the problem of how a person can interact with another within the ethnographic practice. Ethnographic research doesn’t consist only in dialogues but also in bodily experiences that have a key role in the production of ethnographic representations. Experiential anthropologists believe that w…