11,358 research outputs found
A problematic zygopleuroid gastropod Acanthostrophia revisited
No full textSEM examination of the type series of Acathostrophia acanthica CONTI & FISCHER, 1984 from Middle Jurassic of Italy has shown that this gastropod most likely belongs to the family Protorculidae as previously suggested by NÜTZEL (1998). It is also similar to some Jurassic species of Polygyrinidae, which might also be related to Protorculidae. The supposition of KAIM et al. (2008) that Acanthostrophia is an early member of Abyssochrysidae could not be confirmed
Discussione del saggio “Le origini storiche dei conti finanziari: negli Stati Uniti e in Italia: Copeland, Baffi, le istituzioni”, di R. De Bonis e A. Gigliobianco
No full textLa discussione rientra nel convegno su "I conti finanziari: la storia, i metodi, l'Italia e i confronti internazionali", Banca d'Italia, Perugia, 2005. Il convegno ha presentato lavori di ricerca sui conti finanziari, statistiche che la Banca d'Italia pubblica dai primi anni Sessanta e oggi prodotte e ampiamente utilizzate dall'Eurosistema. Nella prima sessione, dedicata alla storia dei Conti Finanziari, è stato presentato il contributo di De Bonis e Gigliobianco sulle origini dei conti finanziari negli Stati Uniti e in Italia. La discussione riguarda la relazione di De Bonis e Gigliobianco sul processo culturale che portò alla costruzione dei Conti Finanziari in Banca d'Italia nel secondo dopoguerra. Il mio commento è centrato su: 1. il ruolo delle istituzioni di ricerca (e delle banche centrali) nella costruzione dei sistemi di contabilità macroeconomica e in tale ambito dei conti finanziari; 2. Il bilancio monetario di Baffi e la via nazionale ai Conti Finanziari; 3. Dal bilancio monetario di Baffi del 1949 alle matrici finanziarie di Mario Ercolani e Franco Cotula del 1964, 1969: elementi di continuità e di rottura
"Anciens et nouveaux points cardinaux:orientation et défis d'un monde en devenir" (Book Abstract)
No full textLa 5ème Rencontre du CEDITER, organisée à Bari conjointement avec l’Université Aldo Moro de Bari (Italie), est divisée autour de 4 Sessions : la relationnalité, la dimension historique des territoires, les ressources culturelles et les conditions institutionnelles. Le titre de la Rencontre « ANCIENS ET NOUVEAUX POINTS CARDINAUX : ORIENTATION ET DÉFIS D'UN MONDE EN DEVENIR » représente la métaphore des points cardinaux. En fait, ces points cardinaux se poursuivent, s'entrelacent, même s'ils ne suivent pas de règles dictées a priori. Chacun d’entre eux sous-tend une réflexion scientifique qui s'est développée dans ces dernières décennies mais, pour répondre à la nécessité d'arriver à une connaissance adéquate de la réalité, ils doivent nécessairement dialoguer. Il s'agit donc de faire interagir de manière holistique. L'enjeu, en effet, est de reformuler l'agenda de la connaissance, de se débarrasser des certitudes présumées, de plus en plus mises en crise, d'affronter les dilemmes, la multiplicité des visions possibles : c'est-à-dire de construire des relations entre des pensées différentes, préfigurant de nouveaux scénarios, voire inédits
Are you the right partner? R&D agreement as a screening device
No full textThis paper focuses on the strategic use of firms' R&D agreements to overcome R&D inefficiencies under asymmetric information and research spillovers. We introduce a duopoly game where initially one firm is not fully informed on its rival's R&D productivity. We show that, without R&D agreements, the usual underinvestment problem can be exacerbated by the presence of asymmetric information. However, the R&D agreement can be used strategically as a screening device to assess the true type of the firm with private information, hence solving the inefficiencies generated by asymmetric information. According to the model, firms are more likely to pursuit R&D agreements in presence of similar productivity and less when their productivity gap is high. This is consistent with the empirical findings highlighting the importance of firms' similarities for R&D collaborations
Cuntz algebra automorphisms: graphs and stability of permutations
No full textWe characterize the permutative automorphisms of the Cuntz algebra On (namely, stable permutations) in terms of two sequences of graphs that we associate to any permutation of a discrete hypercube [n]t. As applications we show that in the limit of large t (resp. n) almost all permutations are not stable, thus proving Conj. 12.5 of Brenti and Conti [Adv. Math. 381 (2021), p. 60], characterize (and enumerate) stable quadratic 4 and 5-cycles, as well as a notable class of stable quadratic r-cycles, i.e. those admitting a compatible cyclic factorization by stable transpositions. Some of our results use new combinatorial concepts that may be of independent interest
D'Annunzio, Conti e la critica
No full textMovendo dalle pagine dedicate negli anni napoletani a De Sanctis, oltre che dalla recensione al "Giorgione" di Conti apparsa sul primo numero del "Convito", il contributo analizza origini e caratteri del critico artifex additus artifici preconizzato da d'Annunzio, sottolineandone la convergenza programmatica con "quello stilista delicato e ricco che fu Walter Pater". Solo che in d'Annunzio (o anche in Conti, chiamato nel 1904 a dirigere e a riordinare la Pinacoteca dei Musei Nazionali di Napoli, al centro della quale ipotizzava addirittura una sala per esecuzioni musicali) il critico artista doveva poi muovere incontro alle forme e i processi dell'esistenza collettiva, promuovendo attivamente il mito incarnato di una vita in bellezza. La religione estetica si rivela dunque politica della cultura
Cuntz algebra automorphisms: Graphs and stability of permutations
No full textWe characterize the permutative automorphisms of the Cuntz algebra O n (namely, stable permutations) in terms of two sequences of graphs that we associate to any permutation of a discrete hypercube [n](t). As applications we show that in the limit of large t (resp. n) almost all permutations are not stable, thus proving Conj. 12.5 of Brenti and Conti [Adv. Math. 381 (2021), p. 60], characterize (and enumerate) stable quadratic 4 and 5-cycles, as well as a notable class of stable quadratic r-cycles, i.e. those admitting a compatible cyclic factorization by stable transpositions. Some of our results use new combinatorial concepts that may be of independent interest
I nuovi conti economici dell'agricoltura (SEC 1995) e la riforma della PAC
No full textLa revisione del sistema europeo dei conti attuata dal SEC 1995 ha reso necessario un adeguamento della metodologia di base della precedente versione dei conti economici dell'agricoltura.
Il lavoro prende in esame le caratteristiche generali dei nuovi conti economici, la classificazione delle attività economiche e la misurazione della produzione.
Oltre alle norme generali sulla rilevazione dei flussi produttivi nella relazione vengono valutati gli effetti della riforma della PAC sulla valutazione della produzione agricola ai prezzi di base (prezzo di mercato+ contributi ai prodotti - imposte sui prodotti)
DCPR-R and Somatic Symptom Disorder in Patients with Severe Irritable Bowel Syndrome
No full textBackground: Doubts have been expressed in literature whether the new revised DSM-5 category of Somatic Symptom Disorder (SSD) may meet the basic requirements of clinical utility in the identification of the psychological factors influencing the course of medical disorders. The aim was to investigate the ability of SSD and DCPR-R criteria to identify patients with more severe manifestations of Irritable Bowel Syndrome (IBS) symptoms who are often seen by clinicians as difficult patients. To our knowledge this is the first study investigating SSD and DCPR-R in severe IBS and therefore no a priori expectation could be stated. Methods: Consecutive 203 IBS patients were recruited. They were evaluated for SSD by the combined use of PHQ-15 and WI-7, DCPR-R syndromes with the related semi-structured interview, severity of IBS with the IBS-SSS scale, psychological distress with the HADS, and psychosocial functioning with the SF-12. Results: Twenty-seven percent of patients fulfilled criteria for SSD, 90% for at least one DCPR-R (mainly alexithymia, persistent somatization, demoralization, and allostatic load), and 20% for both DCPR-R and SSD. The presence of DCPR-R alexithymia and persistent somatization were associated with IBS severity with large effect size (d=1.18) that was even more than with the joint presence of SSD (d=1.07). Conclusions: Betweengroup comparison and multivariate regression showed DCPRR alexithymia and persistent somatization, but not SSD, predicted more severe forms of IBS, after controlling for psychological distress and psychosocial functioning
Research on Markets for Inventions and Implications for R&D Allocation Strategies
No full textSeveral streams of literature have examined the phenomenon of “markets for inventions”, that is, the trade of elements of knowledge which are “disembodied” from individuals, organizations, and products. The aims of this paper are to bring together the various streams of research in this area and discuss their major assumptions and limitations, in order to provide a comprehensive framework for understanding the phenomenon, and identify promising paths for future research. We start our review by identifying the object of market exchange—that is, an invention whose knowledge has been codified and disembodied from individuals, organizations, or artifacts. We then identify those factors that enable firms to trade inventions, distinguishing between institutional-, firm-, and industry-level factors. We close our analysis of the extant literature by discussing the implications of markets for inventions for firm behavior and performance. Against this background, we highlight an important avenue for future research. A neglected implication of the development of invention markets is that firms are confronted with a wide variety of technological paths from which to choose, because the opportunity to acquire technologies on the market offers them a greater variety that can their internal R&D departments. However, the streams of research on markets for inventions and on R&D allocation strategies have been surprisingly disconnected so far. Hence, in the final section, we start to establish and explore the link between these literatures, and to identify a research agenda in this domain
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