73,814 research outputs found
Self-organising assembly systems formally specified in Maude
No full textThis article recapitulates on the research done in self-organising assembly systems (SOAS) and presents the completed formal specifications and their simulation in Maude. SOAS are assembly systems that (1) participate in their own design by spontaneously organising themselves in the shop floor layout in response to the arrival of a product order and (2) manage themselves during production. The self-organising process for SOAS to design themselves follows the Chemical Abstract Machine (CHAM) paradigm: industrial robots self-select and self-arrange according to specific chemical rules in response to a product order with generic assembly instructions (GAP). This article presents an additional set of rules describing how the GAP is transformed into layout-specific assembly instructions, which is a kind of recipe for how the self-organising robots assemble the product
VALUTAZIONE IN VITRO DELL’EFFETTO DEL VICRYL 910 PLUS SULLE COLONIE BATTERICHE DI P. AERUGINOSA E S. MUTANS
No full textSelf-management of self-organising mobile computing applications : a separation of concerns approach
No full textAlthough the research area of self-organising systems is well established, their construction is often ad hoc. Consequently, such software is difficult reuse across applications that require similar functionality of have similar goals. The development of self-organising applications and, a fortiori, self-organising mobile applications is therefore limited to developers who are experts in specific self-organising mechanisms. As a first step towards addressing this, this paper discusses the notion of self-organising mechanisms provided as services for building higher level functionality in a modular way. This eases reuse and thus provides separation of concerns. Additionally, because of the dynamic and heterogeneous nature of mobile networks, services need to adapt themselves in order to ensure both functional and non-functional requirements. This paper discusses whether the self-management of self-organising mobile applications can be achieved in a modular fashion, via the self-management of low level self-organising services it employs, rather than considering the management of the complex system as a whole. We empirically investigate two non-functional aspects: resource optimisation and accuracy
MOVPE growth optimisation of CdTe epitaxial layersfor p-i-n diode X-ray detector fabrication
No full textWe report on the atmospheric pressure metalorganic vapour phase epitaxy of both nominally undoped and iodine (I) donor doped CdTe layers on high resistivity (111)B CdTe substrates, as a preliminary step towards the fabrication of p-i-n diode X-ray detectors. CdTe epilayers were grown at 330 °C after in-situ H2 heat treatment of the substrate for surface oxide removal. We show that the homoepitaxy of CdTe critically depends on in-situ heat treatment temperature (TA), best epilayer morphology and reduced surface roughness being obtained for TA = 350 °C. Secondary ion mass spectrometry analysis of I-doped samples shows good dopant incorporation, which increases for Te:Cd precursor molar flow ratios in the vapour below unity. I-doped samples grown under the latter conditions have room temperature resistivity three orders of magnitude lower than for undoped layers and electron concentrations ~1016 cm–3
The L-p-to-L-q boundedness of commutators with applications to the Jacobian operator
No full textSupplying the missing necessary conditions, we complete the characterisation of the L-p -> L-q boundedness of commutators [b, T] of pointwise multiplication and Calderon-Zygmund operators, for arbitrary pairs of 1 q, our results are new even for special classical operators with smooth kernels. As an application, we show that every f is an element of L-p(R-d) can be represented as a convergent series of normalised Jacobians J(u) = det del uof u is an element of (over dot(W))(1,dp)(R-d)(d). This extends, from p = 1 to p > 1, a result of Coifman, Lions, Meyer and Semmes about J:. (over dot(W))(1,d)(R-d)(d) -> H-1(R-d), and supports a conjecture of Iwaniec about the solvability of the equation Ju = f is an element of L-p(R-d). (C) 2021 The Author(s). Published by Elsevier Masson SAS.Peer reviewe
Introduction (Themed section presentation)
No full textAs an analytical category and as a phenomenon linked to deviation, conflict, power and rights, violence has been widely dealt with in social sciences. Its range of relevance, however, has been studied less frequently in relation to the variety of its forms, and its relationship with order and social change.
This paper introduces the themed section on "Global Violence and Social Change" of the International Review of Sociology 30 (2)
Inflammatory aneurysms of the abdominal aorta. A prospective clinical study (multiple letters) [2]
No full textInflammatory aneurysms of the abdominal aorta. A prospective clinical stud
Francesco Venezia : lo inagotable de las cosas
No full textA partire da una conversazione con Francesco Venezia - e da alcuni passaggi di scritti di Manfredo Tafuri e Alvaro Siza da cui si desume l’idea che il progetto di architettura per Venezia sia un lavoro eminentemente selettivo che impone di concentrarsi non sulle fronde o sulle “attrattive della novità”, ma sulle radici e su quella che l’architetto napoletano definisce l’“inesauribilità delle cose” - lo scritto esamina alcuni nuclei tematici dell’opera dell’architetto napoletano: la luce, le proporzioni, gli spazi ipogei, il rapporto con la storia e con i maestri
L-carnitine and carnitine ester transport in the rat small intestine
No full textL-Carnitine and its esters (acetyl-L-carnitine and propionyl-L-carnitine) at pharmacological doses (1,5 and 100 mM) are absorbed by the rat jejunum by simple diffusion. Partition coefficients of carnitin eesters determined in lipophilic media (diethyl ether/water and olive oil/water) are greater than that of L-carnitine. It would therefore seem that esters diffuse more easily through th elipid component of the intestinal barrier. The transport of acetyl- and propionyl-L-carnitine at pharmacological doses seems to be linearly and positively correlated with K+ transport but not with Na+ transport
Inflammatory aneurysm of the abdominal aorta: anatomo-clinical study on 16 cases and pathogenetic hypothesis
No full textBACKGROUND. Inflammatory aneurysms of the abdominal aorta constitute an anatomoclinical entity characterised by prominent thickening and fibrosis of the aneurysmal wall, extending to the adjoining structures. Etiology, pathogenesis and relation with atherosclerosis still remain controversial. METHODS. Sixteen consecutive patients undergoing surgery for inflammatory aneurysm of the abdominal aorta between March 1987 and December 1990 were studied (Group I); as a control, a series of 16 consecutive patients operated on in the same period for atherosclerotic aneurysm of the abdominal aorta was selected (Group II). As far as clinical history and symptoms are concerned, the comparison between the two groups revealed significant differences only for hydronephrosis (exclusively present in Group I, p < 0.05) and abdominal pain (more frequent in Group I, p < 0.01). The microscopic study of the aneurysmal wall was performed by scoring its histological features (atherosclerotic lesions, medial and adventitial fibrosis, inflammatory infiltrates and lymphatic stasis) from 1+ to 3+. RESULTS. As regards the microscopical features, atherosclerotic lesions were present in all the examined cases, whereas periadventitial fibrosis appeared in all the aneurysms of Group I and in none of Group II; the comparison between the two groups revealed further significant differences for extensive intimal calcification (exclusively present in Group II, p < 0.05), fibrous replacement of the tunica media (more thorough in Group I, p < 0.02), and the extent of inflammatory infiltrates (more prominent in Group I, p < 0.05). CONCLUSIONS. From the scarcity of pathognomonic features in both case-history and clinical presentation, the constant coexistence of prominent atherosclerotic lesions, and the progressive trend of the pathologic features, inflammatory aneurysms may be inferred to be a variant of atherosclerotic ones, characterised by a particular prominence of inflammation and fibrosis. The frequent occurrence of dilation of both periaortic lymphatic vessels and lymph node sinuses, even in "incipient" aneurysms, supports the hypothesis that it may be the lymphatic stasis which determines periaortic fibrosis. Finally, atherosclerotic components passing into periaortic fibrosis and eliciting granulomatous reaction were observed in two Group I cases featuring prominent "inflammatory" symptoms; such a finding favours the hypothesis that an immune reaction against some components of the atherosclerotic plaque may lead to the pronounced inflammatory response that is peculiar of inflammatory aneurysms
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