352 research outputs found
Oxidative dealkylation of a hindered phenol catalyzed by copper (II) bis benzimidazole diamide complex
No full textThe oxidative dealkylation of 2,4,6-tri-tert-butylphenol (TTBP) has been investigated using molecular oxygen and Cu(NO3(GBHA)(NO3) as catalyst, where GBHA is N,N′-bis((benzimidazol-2-yl)methyl)hexanediamide (a) M. Gupta, P. Mathur, R.J. Butcher, Inorg. Chem. 40 (2001) 878; (b) M. Gupta, S.K. Das, P. Mathur, A.W. Cordes, Inorg. Chim. Acta 353 (2003) 197; (c) S. Tehlan, M.S. Hundal, P. Mathur, Inorg. Chem. 43 (2004) 6589; (d) F. Afreen, P. Mathur, A. Rheingold, Inorg. Chim. Acta 358 (2005) 1125.. X-ray structural characterization of complex Cu(NO3)(GBHA)(NO3)·CH3OH confirms that the Cu (II) ion is in a distorted square pyramidal geometry (τ=0.168). The TTBP oxidation reaction proceeds via tri-tert-butylphenoxyl radical producing two products 2,6-di-tert-butyl-1,4-benzoquinone (A) and 4,6-di-tert-butyl-1,2-benzoquinone (B). Both A and B have been well characterized by 1H NMR, 13C NMR, UV–Vis and mass data
Digital Media and Knowledge Production Within Social Movements: Insights From the Transition Movement in Italy
No full textsponsorship: The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This article grounds in research activites carried out in the period 2016-2017 within the framework of the project "MAKERS- Movements as knowledge producers and learning spaces in the digital age" funded by the Scuola Normale Superiore. (Scuola Normale Superiore)status: Publishe
Esiste in Italia un diritto al figlio sano? (Riflessioni a margine della causa Costa et Pavan vs Italia)
No full textThe author, starting from the case Costa et Pavan vs Italy decided by the European Court of Human Rights, poses the question about the existence in Italy of the right to a healthy son. In the light of the data both legislative and jurisprudential, she concludes to deny the existence of such a right in italian law and casts doubt on the power of the Strasbourg Court to take basic policy decisions on "new rights", for which there are no specific constitutional requirements and there is a tragic conflict about them within society and societies
In Dowland’s Own Words: Poetry and Rhetoric in ‘Flow My Tears’ and ‘Lachrimae’ Pavan
No full textJohn Dowland (1563–1626) was among the finest lute players of his time and is widely recognized as the greatest English composer of lute music and lute song. Despite there being nearly 100 sources containing Dowland’s music, only 10 per cent of these can be directly connected to Dowland, and only his single-author songbooks can be considered authoritative texts. As a result, modern scholar-performers are required to look beyond the tablature to identify Dowland’s personal performance style, seeking justification for interpretive decisions in other historical sources. While treatises and organology dominate historical performance research, Dowland’s contrafacts—pieces existing as both songs and instrumental dances—offer equally valuable insights. This article focuses on the most famous example of this musical interrelationship: the instrumental solo ‘Lachrimae’ pavan and the corresponding lute song ‘Flow My Tears.’ The published lute song provides an important opportunity to directly examine an authoritative Dowland composition, with particular focus on his treatment of rhetorical devices, word stress, articulations, and punctuation. Although the links to the original instrumental pavan are not always immediately clear or easy to identify, once established, they provide robust opportunities to learn from the vocal version when interpreting the related solo piece
Linguistic Representations of Motion Do Not Depend on the Visual Motion System
No full textEmbodied semantics proposes that constructing the meaning of motion verb phrases relies on representations of motion in sensory cortex. However, the data reported by earlier studies as evidence for this claim are also explained by a symbolic-semantics view proposing interactions between dissociable systems. In the experiments reported here, participants were visually adapted to real and implied leftward or rightward motion, which produced a motion aftereffect opposite to the direction of the adapting stimulus. Participants then decided whether a directionally ambiguous or a leftward- or rightward-directional verb phrase implied leftward or rightward motion. Because the visual system is engaged in the motion aftereffect, embodied semantics predicts that responses in the motion-aftereffect direction (opposite to the direction of the adapting stimulus) are facilitated, whereas symbolic semantics predicts response facilitation in the direction of the adapting stimulus (opposite to the direction of the motion aftereffect). We found response facilitation in the direction of real- and implied-motion adapting stimuli in ambiguous and directional verb phrases. These results suggest that visual and linguistic representations of motion can be dissociated. © The Author(s) 2012
Spatially evolving cascades in wall turbulence with and without interface
No full textDirect numerical simulations of channel flow and temporal boundary layer at a Reynolds number Reτ=1500 are used to assess the scale-by-scale mechanisms of wall turbulence. From the peak of turbulence production embedded at the small scales of the near-wall region, spatially ascending reverse cascades are generated that move through self-similar eddies growing in size with the wall distance. These fluxes are followed by spatially ascending forward cascades through detached eddies thus reaching sufficiently small scales where eventually scale energy is dissipated. This phenomenology is shared by both boundary layer and channel flow and is recognized as a robust physical feature characterizing wall turbulence in general. Specific features related to the flow configuration are indeed identified in the outer region. In particular, the central region of channels is characterized by a generalized Richardson energy cascade where large scales are in equilibrium with small scales at different wall distances through a combined forward cascade and spatial flux. On the contrary, the interface region of boundary layers is characterized by an almost two-dimensional physics where spatially ascending reverse cascades sustain long and wide interface structures with a forward cascade that survives only in the wall-normal scales. The overall scenario consists in a variety of scale motions that while protruding from the turbulent core towards the external region, squeeze at the interface thus sustaining vertical shear in a thin layer. The observed multidimensional physics sheds light on the complex interactions between outer entrainment and near-wall self-sustaining mechanisms with possible repercussions for theories.Energy Technolog
Monomeric Cu (II) complexes with tetradentate bis (benzimidazole) ligand ; synthesis, EPR, spectral and electrochemical studies
No full textModeling NAND Flash memories for circuit simulations
No full textIn this paper, we will present the basic structure and the parameter extraction procedure for a compact model of a NAND Flash memory string working in Spice-like circuit simulators. To the author knowledge, this is the first Spice-like model of a NAND Flash memory string. This model is modular and simple to be implemented. It will allow accurately reproducing both DC and transient behavior of NAND Flash memories without increasing computational effort, thus becoming an indispensable tool for designers to optimize circuits especially in multi-level applications
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