1,355,034 research outputs found
Mesophasic structures in polymers. Mesophases of some poly(alkanoates) of p,p'-dihydroxy-a,a'-dimethylbenzalazine
No full textripubblicazione di Journal of Polymer Science, Polymer Letters Edition (1975), 13(8), 455-6
Mesophasic structures in polymers. Mesophases of some poly(alkanoates) of p,p'-dihydroxy-a,a'-dimethylbenzalazine
No full textripubblicazione di Journal of Polymer Science, Polymer Letters Edition (1975), 13(8), 455-6
The accentuation principle of figure–ground segregation and the downbeat illusion
No full textPinna and Sirigu (2011) demonstrated a new principle of grouping, called the accentuation principle, stating that, all else being equal, elements tend to group in the same oriented direction of the discontinuous element placed within a whole set of continuous/homogeneous components. The discontinuous element behaves like an accent, i.e. a visual emphasis within the wholeness of components as shown in the next section.
In this work, the accentuation principle has been extended to new visual domains. In particular, it is shown how this principle affects shape perception. Moreover several visual object attributes are also highlighted, among which orientation, spatial position, inner dynamics and apparent motion that determine the so-called organic segmentation and furthermore tend to induce figure–ground segregation. On the basis of the results of experi- mental phenomenology, the accentuation can be considered as a complex principle ruling grouping, figure– ground segregation, shape and meaning formation.
Through a new musical illusion of downbeat, it is also demonstrated that this principle influences perceptual or- ganization not only in space but also in time and, thus, in both visual and musical domains. This illusion can be heard in eight measures of Pagodes, a solo piano music by Claude Debussy (1862–1918), where a strong physi- cal–perceptual discrepancy in terms of upbeats and downbeats inversion is strongly perceived in both staves
Sirigu Symbols: A Metaphoric Element for Batik Prints
No full textTextile design and elements of design exist within a context—philosophical, cultural, location and gender specific—from which it emerges and without which it does not exist. Textile designers and art philosophers cannot escape the influence of past metaphors and culture any more than they can remain untouched by current trends in technology, and design. This paper seeks to establish the fact that Sirigu symbols (a thriving cultural symbolism of Northern Ghana seen as a mural wall painting) can be artistically transferred onto fabrics as batik motifs capable of meeting the contemporary concepts of textile design print. The study employed both the descriptive and experimental methods to produce samples of batik design prints for the Ghanaian market. It explored the use of mercerized cotton and vat dyes to produce fashionable clothing. The result of the study indicates that Sirigu symbols can be transferred onto fabrics to bring aesthetic variations and metaphoric significance that can compete favourable with other symbolic clothing. The concept could be explored further to inspire and educate producers as well as students to increase innovation. Discussions were based on academic, historical, cultural, philosophical and artistic contexts. The piece captured the communicative dynamics inherent in symbolic fabric design print and showed inventiveness, diversity, contrast, harmony, multiplicity and stability. The research proved that such traditional symbols still have enormous import for contemporary textile design concepts to promote the culture of Ghanaian textile products. Keywords: culture, metaphor, aesthetic symbolism, Sirigu Symbols, Sirigu mural paintings
European Manufacturers Towards the Circular Economy: Barriers that Hinder the Effective Implementation
No full textThe chapter aims at investigating the barriers that overall hinder the implementation of the circular economy (CE) principles within the European manufacturing sector. Based on an in-depth literature review carried out with a systematic approach, the chapter aims at identifying and in-depth describing the external and internal barriers that affect the implementation of CE principles. In the end, a comprehensive map of such barriers and possible ways to overcome these are reported as the main contributions of the study
Spectral-domain modelling of a non-linear wave energy converter: Analytical derivation and computational experiments
No full textHarvesting energy from waves is gaining popularity in the last decades, due to growing
technological maturity and reduction of manufacturing costs of Wave Energy Converter (WEC)
devices. However, the optimal design of WECs represents a challenge to its large-scale commercialisation. Behind this multi-objective optimisation, a significant number of simulations
are necessary to identify the optimal configuration of the device that minimise certain technoeconomic parameter. Frequency-domain models are suggested in an early stage since they
provide a simple and fast simulation tool. On the other hand, non linear time-domain numerical
models are more suitable during an advanced design phase where it is essential to assess
performance and acting loads with greater reliability. The aim of this work is the development of
a spectral-domain model of a WEC device that combines the computational speed of frequencydomain models with the accuracy of non-linear models to improve the design in early stage.
Three different models of the ISWEC, a WEC developed by the MOREnergy Lab of Politecnico di
Torino (Italy), are derived and compared: a fully non-linear time-domain model, a frequencydomain model, and a spectral-domain model. The spectral-domain modelling of the ISWEC
system represents an important novelty for the technological development of the system and
an example framework for similar technologies. Moreover, in the energy harvesting field, no
previous work addressed the analytical representation of a realistic electro-mechanical converter
with both torque and power saturation, and the representation of a gyro-pendulum system in
spectral-domain remains untreated. The numerical experiments demonstrate that the spectraldomain model shows an improved accuracy compared with the frequency-domain model, with
a reduction of percentage error of the computed gross power in the order of two times. Despite
a not perfect accuracy of the spectral-domain model against the time-domain one, the spectraldomain framework is considered as a valid solution due to its computational efficiency, that is
demonstrated to be, at least, three order of magnitude higher than the time-domain on
How we interact with objects: learning from brain lesions
No full textMotor deficits are the most common outcome of brain damage. Although a large part of such disturbances arises from loss of elementary sensorimotor functions, several syndromes cannot be explained purely on these bases. In this article, we briefly describe higher-order motor impairments, with specific attention to the characteristic ability of the human hand to interact with objects and tools. Disruption of this motor skill at several independent levels is used to outline a comprehensive model, in which various current proposals for a modular organization of hand-object interactions can be integrated. In this model, cortical mechanisms related to object interaction are independent from representations of the semantic features of objects
Composizione floristica delle sugherete nel Marghine-Goceano (Sardegna centro-settentrionale)
No full textLa ricerca tende a definire, preliminarmente, la composizione floristica dei diversi aspetti fisionomici della sughereta (formazioni mature a bosco misto, boschi puri ben strutturati con macchia alta ad erica e citiso, garighe arborate con strato arbustivo costituito essenzialmente da cisto e lavanda, pascoli arborati) individuati in quest'area
Liquid crystalline properties of linear and network polymers containing allyl groups as lateral substituents.
No full text- …
