Search results for "Dimension"
showing 10 items of 2766 documents
LA PREGHIERA POST-SECOLARIZZATA DEI MILLENNIALS
2019
The article discusses the theme of prayer understood as a process of individual research of a secular spirituality rather than as a ritual practice among members of the same faith. Trough the answers given by a sample of 1026 students of Palermo University, the prayer appears as the result of a individualization’s process and assumes post-secularized connotations. The answers given during the focus groups conducted, identify in the choice of Millennials to ‘pray’ an activity of reflection that goes beyond the autopoietic and self-referential dimension.Millennials’ pray is a self-reflexive prayer that often questions the great themes of this time – euthanasia, abortion, procreative choices, …
Un uso economico della violenza o una sua nuova declinazione?
2021
Il nesso tra mafia e violenza è, anche simbolicamente, tra i più rilevanti. “Capitale elementare” delle mafie, la violenza crea legami e relazioni; è un fattore identitario, strumento d’esibizione simbolica del potere, mezzo per demarcare il limite dell’appartenenza e della legittimità, assumendo, quando occorre, forme più raffinate e qualificate. Tenendo presente la sua declinazione in termini qualitativi più che la sua maggiore o minore incidenza in termini quantitativi, vanno lette le risposte alla domanda se oggi, rispetto al passato, la mafia sia più o meno incline alla violenza (o se sia “violenta” come prima).
Dimensione frattale in biologia ed in medicina umana.
2009
Nell’organismo umano, esistono fattori che contribuiscono a rendere stabili i suoi sistemi frattali biologici. Nel presente lavoro di anatomia comparata e di fisiologia, illustro alcuni di questi sistemi ad invarianza di scala; descrivo le principali forze che li determinano, li regolano e stabilizzano. Riporto altresì alcune patologie, collegate alle alterazioni della (FD) dimensione frattale. La ricca bibliografia consultata mi ha dato modo di tracciare importanti correlazioni come quello tra due dimensioni frattali: del sistema nervoso centrale e della circolazione sanguigna cerebrale.
L'evento persona
2018
Il titolo è un monogramma dell’opera: la persona è un evento educativo, la sua ontologia apre il senso originario dell’educare. La Prima parte contiene i Segnavia, saggi di pedagogia fondamentale che elaborano una concezione dell’educazione definita da due istanze: una esistenziale, la realizzazione di una vita piena e totale; l’altra storica, la personalizzazione di un’eredità di senso. La Seconda parte apre Sentieri, attraverso testi di antropologia pedagogica che esplicitano quanto apprendiamo sulla persona nei mondi dell’educazione. Sono dedicati alla famiglia e all’«umanesimo dell’intimità»; all’esperienza di quanti, soprattutto nel volontariato, fanno rientrare nella riuscita della vi…
Generalised stage-discharge relationship for rectangular weirs
2018
Rectangular weirs, which are very common hydraulic structures used in irrigation channels as water measuring devices, can be used for measuring very small discharges as well as high flow rates. From the practical point of view the availability of a unique stage-discharge formula that can be applied for the different types of the rectangular weirs would be of great practical importance. At first, in this paper the Buckingham’s Theorem of the dimensional analysis and the self-similarity theory are used to deduce the stage-discharge curve of different kinds of rectangular weirs such as slit and partially contracted ones. Then the proposed formula is calibrated using both the experimental data …
On Shimura subvarieties of the Prym locus
2018
We show that families of Pryms of abelian Galois covers of $\mathbb{P}^1$ in $A_{g-1}$ (resp. $A_g$) do not give rise to high dimensional Shimura subvareties.
Presence and Absence in Global Virtual Team Meetings : Physical, Virtual, and Social Dimensions
2016
Global virtual work is commonly organised around virtual meetings. As virtual team members often belong to multiple groups in their work, finding time for global team meetings may be challenging due to competing priorities and roles as well as different time zones and schedules. Furthermore, social presence does not automatically emerge based on physical or virtual presence. Therefore, the notions of being physically, virtually and socially present or absent in global team meetings are important, and affect the collaboration of global work groups. These different dimensions of presence and absence and their nature as fluctuating phenomena have not yet been scrutinised in virtual work litera…
Multi-temporal and Multi-source Remote Sensing Image Classification by Nonlinear Relative Normalization
2016
Remote sensing image classification exploiting multiple sensors is a very challenging problem: data from different modalities are affected by spectral distortions and mis-alignments of all kinds, and this hampers re-using models built for one image to be used successfully in other scenes. In order to adapt and transfer models across image acquisitions, one must be able to cope with datasets that are not co-registered, acquired under different illumination and atmospheric conditions, by different sensors, and with scarce ground references. Traditionally, methods based on histogram matching have been used. However, they fail when densities have very different shapes or when there is no corres…
Nonlinear Distribution Regression for Remote Sensing Applications
2020
In many remote sensing applications, one wants to estimate variables or parameters of interest from observations. When the target variable is available at a resolution that matches the remote sensing observations, standard algorithms, such as neural networks, random forests, or the Gaussian processes, are readily available to relate the two. However, we often encounter situations where the target variable is only available at the group level, i.e., collectively associated with a number of remotely sensed observations. This problem setting is known in statistics and machine learning as multiple instance learning (MIL) or distribution regression (DR). This article introduces a nonlinear (kern…
Random Feature Approximation for Online Nonlinear Graph Topology Identification
2021
Online topology estimation of graph-connected time series is challenging, especially since the causal dependencies in many real-world networks are nonlinear. In this paper, we propose a kernel-based algorithm for graph topology estimation. The algorithm uses a Fourier-based Random feature approximation to tackle the curse of dimensionality associated with the kernel representations. Exploiting the fact that the real-world networks often exhibit sparse topologies, we propose a group lasso based optimization framework, which is solve using an iterative composite objective mirror descent method, yielding an online algorithm with fixed computational complexity per iteration. The experiments con…