1,721,209 research outputs found
Premessa. La questione della cosa
No full textIl contributo si pone la finalità di mostrare in che senso il concetto di cosa costituisca uno dei topoi massimamente ricorrenti nell'ambito della storia della filosofia, a partire dal primo pensiero greco sino agli sviluppi del pensiero novecentesco. La prima parte del contributo elabora una giustificazione di questa centralità. La seconda parte analizza alcune prospettive elaborate da diversi autori nel quadro di un Convegno Internazionale tenutosi a Bari nel 2015
C. Donati, F. Marrone, F. Misiani, Stato e costituzione in Cina
No full textC. Donati, F. Marrone, F. Misiani, Stato e costituzione in Cina. In: Revue internationale de droit comparé. Vol. 29 N°3, Juillet-septembre 1977. pp. 625-627
Res e Realitas: Enrico di Gand e il vocabolario della cosa
No full textThis paper aims at investigating the vocabulary of thingness in the thought of Henry of Ghent. The paper features two main parts: in the first part we try to clarify the statement and the implications of the distinction between the concept of res a reor, reris and the concept of res a ratitudine. On the subject the thesis argued that this distinction has essentially an epistemological function in Henry of Ghent’s thought. The second part of the paper, instead, takes into consideration the concept of realitas as it is formulated by Henry in some sections of his Quodlibeta. The argued thesis is that realitas is not a synonym of being, but rather designates the inner foundation of every ontological attribution
C. Donati, F. Marrone, F. Misiani, Stato e costituzione in Cina
No full textC. Donati, F. Marrone, F. Misiani, Stato e costituzione in Cina. In: Revue internationale de droit comparé. Vol. 29 N°3, Juillet-septembre 1977. pp. 625-627
Kinematics and Control of a Housekeeping Robot Assistant
No full textIn this paper, the compliant controller of a new service mobile robot designed for cleaning tasks and its kinematic modelling is addressed. Robot systems usage in home environment has been exponential increased in the last years thus placing a central importance on making interaction between people and machine as natural as possible. The main focus of this paper is twofold. First, the forward kinematics of the robot will be presented in order to introduce the closed form solution of the inverse kinematics problem. Second, the closed form solution will be used in the the design of a new kind of hybrid force/position control algorithm. The most important improvements of this control law are the flexibility and the simplicity. The compliant motion performed by this controller allows the robot to execute interaction tasks both with the environment and with the user and this make it easy to be used by non-experts. A table cleaning and a path teaching are two example of such a kind of tasks that will be performed from the robot in order to validate experimentally the results of the paper
Different invasibility of permanent and temporary waterbodies in a semiarid Mediterranean Island
Full text linkNonindigenous species (NIS) represent a threat to aquatic biodiversity worldwide. However, freshwater ecosystems in drylands are potentially more prone to biological invasions than those located in temperate regions because of the higher number of artificial waterbodies generally occurring in these areas, which might act as invasion hubs for NIS. We review the available information about NIS in Sicilian waterbodies, discuss the role exerted by artificial lakes and ponds in facilitating the establishment of NIS in arid and semiarid areas, and compare the invasibility of permanent and temporary waterbodies in drylands. Artificial waterbodies increase the target-area effect for dispersers and provide a hospitable environment for NIS because of their recent origin and the lack of efficient biological filters against newcomers, thus acting as bridgeheads and invasion hubs favouring invasive species. Finally, we propose actions to attenuate the threats caused by NIS to the sensitive native biota of aquatic ecosystems in drylands
On the occurrence of Phallocryptus spinosus (Milne-Edwards, 1840) in Sicily (Crustacea, Branchiopoda)
Full text linkThe distribution, status, and phenology of the anostracan Phallocryptus spinosus in Sicily are described. The only population of the species to date known to occur with certainty on the island inhabits a few temporary water bodies located within the Natura2000 site “ITA010006 - Paludi di Capo Feto e Margi Spanò”. In these sites, the species co-occurs with an interesting halophilous flora and crustacean fauna. Based on available data, the concentration of dissolved salts in the water bodies seem to be the main driver of the life histories of the co-existing populations of the anostracans Artemia salina and Phallocryptus spinosus. 
Molecular data attest to the occurrence of autochthonous daphnia pulex (Crustacea, branchiopoda) populations in Sicily, Italy
Full text linkBiological invasions are known to be among the most important threats to the long-term conservation of native biota, and their effects might be even more difficult to contrast when they are cryptic, i.e., when the non-native invaders cannot be easily recognised based on morphology, and can thus be confused with native taxa. Such cryptic invasions are known to widely occur in the cladoceran genus Daphnia O.F. Müller, 1785, so that the actual distribution and status of most species and lineages need to be checked with a genetic approach. In the frame of this work, we investigated if the Sicilian populations of D. (Daphnia) pulex Leydig, 1860 belonged to the allochthonous North American lineage, which is known to occur in several regions of the Palearctic and Afrotropical biogeographical regions, or rather to the autochthonous European lineage of the species. The molecular results obtained, based on a fragment of the mitochondrial gene encoding for NADH subunit dehydrogenase 5 (ND5), allowed us to rule out the allochthonous status of the species, confirming the presence of autochthonous relictual lineages of D. pulex in Sicily. The native status of these populations is in agreement with their local distribution, limited to natural and poorly-impacted water bodies mostly located in wooded areas at medium and high altitudes. The current local distribution of D. pulex in Sicily is possibly linked to the end of the last glacial maximum and the onset of warmer climatic conditions in the early Holocene, which led the species to take refuge in colder microthermal refugia located at high altitudes, determining their current relictual distribution. se only
New Gynandromorph Records for Chirocephalus diaphanus (Branchiopoda, Anostraca, Chirocephalidae)
Full text linkWe report and describe new Chirocephalus diaphanus Prévost, 1803 gynandromorphs from Tunisia and review the literature of anostracan gynandromorphy and other, possibly associated, somatic aberrations, with comments on their evolutionary significance. Our material has three specimens that are specifi cally deformed on the left side of the head
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