Search results for " space"
showing 10 items of 4562 documents
Il balaneion dell'agorà di Solunto
2019
Ettore Gabrici, who first excavated the structure located in the northwest corner of Solunto’s agora in 1920-21, identified the remains as part of a thermal bath, despite missing some of the key elements which usually characterize this type of buildings (hypocaust, praefurnium, heating pipes). After the re-examination of the architectural elements, this paper suggests a different interpretation which takes into account archaeological evidences from the broader Mediterranean context (especially from Sicily and the Punic world). The results here presented could actively contribute to a better understanding of the hydraulic engineering in Sicily during the Hellenistic Period. As a matter of fa…
Monotone generalized nonlinear contractions and fixed point theorems in ordered metric spaces
2011
The purpose of this paper is to present some fixed point theorems for T -weakly isotone increasing mappings which satisfy a generalized nonlinear contractive condition in complete ordered metric spaces. As application, we establish an existence theorem for a solution of some integral equations.
Ion beam intensity and phase space measurement techniques for ion sources.
2022
Ion sources produce beams used in accelerators and other applications. Both development and use of ion sources need beam diagnostics to probe the plasma processes and beam formation for optimization purposes and to produce beam parameters needed for transport tuning. These diagnostics include beam intensity measurements usually carried out with Faraday cups or inductive pickups, magnetic separation, profile measurements with scintillation screens and wires, and phase space measurements with different types of emittance scanners. peerReviewed
Rimettere in valore gli spazi pubblici del territorio agrigentino
2015
The contemporary city poses a question about regeneration which increasingly finds its answer within the open spaces, where values and potential are recognized not only in ecological and environmental terms but also in terms of agricultural production. However these areas may have consequences on global sustainability and local urban-welfare, provoking identification processes with the places and regenerating the local identities as the only guarantee of survival in a harmonic territory. The research hypothesis is that the coastal areas and peri-urban spaces could contribute substantially to society and sustainable urban development as well as having an impact on social, physical, environme…
Permutations of zero-sumsets in a finite vector space
2020
Abstract In this paper, we consider a finite-dimensional vector space 𝒫 {{\mathcal{P}}} over the Galois field GF ( p ) {\operatorname{GF}(p)} , with p being an odd prime, and the family ℬ k x {{\mathcal{B}}_{k}^{x}} of all k-sets of elements of 𝒫 {\mathcal{P}} summing up to a given element x. The main result of the paper is the characterization, for x = 0 {x=0} , of the permutations of 𝒫 {\mathcal{P}} inducing permutations of ℬ k 0 {{\mathcal{B}}_{k}^{0}} as the invertible linear mappings of the vector space 𝒫 {\mathcal{P}} if p does not divide k, and as the invertible affinities of the affine space 𝒫 {\mathcal{P}} if p divides k. The same question is answered also in the case where …
Analysis of the traditional approaches for astronauts’ personal hygiene in outer space
2016
Various approaches adopted in the years for astronauts' personal hygiene in microgravity conditions are revisited and analysed in this paper. For each approach, benefits, critical aspects of sanitation and comfort, along with the possibility of recycling the amount of used water, are discussed and evaluated.
Unraveling the nature of universal dynamics in O(N) theories
2020
Many-body quantum systems far from equilibrium can exhibit universal scaling dynamics which defy standard classification schemes. Here, we disentangle the dominant excitations in the universal dynamics of highly occupied N-component scalar systems using unequal-time correlators. While previous equal-time studies have conjectured the infrared properties to be universal for all N, we clearly identify for the first time two fundamentally different phenomena relevant at different N. We find all N >= 3 to be indeed dominated by the same Lorentzian "large-N" peak, whereas N = 1 is characterized instead by a non-Lorentzian peak with different properties, and for N = 2, we see a mixture of two cont…
Early evolutionary colocalization of the nuclear ribosomal 5S and 45S gene families in seed plants: evidence from the living fossil gymnosperm Ginkgo…
2012
In seed plants, the colocalization of the 5S loci within the intergenic spacer (IGS) of the nuclear 45S tandem units is restricted to the phylogenetically derived Asteraceae family. However, fluorescent in situ hybridization (FISH) colocalization of both multigene families has also been observed in other unrelated seed plant lineages. Previous work has identified colocalization of 45S and 5S loci in Ginkgo biloba using FISH, but these observations have not been confirmed recently by sequencing a 1.8 kb IGS. In this work, we report the presence of the 45S–5S linkage in G. biloba, suggesting that in seed plants the molecular events leading to the restructuring of the ribosomal loci are much o…
Normatywne kształtowanie terenów zieleni w mieście podstawą budowania zrównoważonych miast
2021
Tereny zieleni w mieście są istotnym zagadnieniem w kształtowaniu struktury funkcjonalno-przestrzennej miasta, a także kształtowania jego rozwoju w sposób zrównoważony. W literaturze przedmiotu zwraca się uwagę na konieczność dążenia do równowagi między celami społecznymi, ekologicznymi i ekonomicznymi, które powinny być definiowane w polityce rozwoju jednostek terytorialnych różnych szczebli, w tym także miast. Istotne jest również zachowanie równości międzypokoleniowej m.in. poprzez zachowanie zasobów środowiska (Fiedor, 2002,s. 23). J. Słodczyk zwraca uwagę, że w realizacji koncepcji miasta zrównoważonego istotne są takie zagadnienia jak m.in. forma przestrzenna miasta, proekologiczne ro…
L'accès des ménages aux services dans l'espace périurbain francilien
2008
The access of populations to services, out of the dense urban centres, is marked by the retreat of the services of proximity to which populations and local councillors appear particularly attached. However, in peri-urban spaces, this remote setting of the resources compared to the populations is the result of the generalized adoption of the automobile standard for mobility and accessibility. That has two effects: first a disintegration of the local offer, then a disintegration of the modal alternatives to the private car, because of relocalizations of services and populations which privilege car for their accessibility and call into question their access by other modes like public transport…