9,375 research outputs found
New Medit
No full textNEW MEDIT, an OPEN ACCESS review, is a quarterly review published on behalf of Ciheam. It is a new edition of the former journal, Medit, which was first published in 1990.
Economics, agriculture, and environment are the keywords of the subjects dealt with in the review. The papers tackle the different problems characterising the economy and the agriculture of the Mediterranean countries, with a multi-disciplinary approach, and the relationships between them. NEW MEDIT is an information and scientific analysis tool for getting a deeper insight into the economic and the social transformations of agriculture and the rural societies as well as in agro-food networks of the Mediterranean Basin
Clone della cultivar Victoria con acino allungato
No full textll clone della varietà Victoria presenta l’acino allungato, risultato gradito ai consumatori. L’analisi molecolare ha rivelato che quella morfologica è l’unica differenza rispetto alla Victoria. Si tratta di una mutazione avvenuta all’interno della gemma per cause natural
Editorial feito por Fábio Rodrigo Ferreira Nobre e Andrea Pacheco Pacífico
No full textFábio Rodrigo Ferreira Nobre e Andrea Pacheco Pacífic
Editorial feito por Fábio Rodrigo Ferreira Nobre e Andrea Pacheco Pacífico
No full textFábio Rodrigo Ferreira Nobre e Andrea Pacheco Pacífic
A New Algorithm for the LQR Problem with Partially Unknown Dynamics
No full textWe consider an LQR optimal control problem with partially unknown dynamics. We propose a new model-based online algorithm to obtain an approximation of the dynamics and the control at the same time during a single simulation. The iterative algorithm is based on a mixture of Reinforcement Learning and optimal control techniques. In particular, we use Gaussian distributions to represent model uncertainty and the probabilistic model is updated at each iteration using Bayesian regression formulas. On the other hand, the control is obtained in feedback form via a Riccati differential equation. We present some numerical tests showing that the algorithm can efficiently bring the system towards the origin
Are the economic valuations of marine and coastal ecosystem services supporting policymakers? A systematic review and remaining gaps and challenges
No full textWith the increasing adoption of the ecosystem approach as integral to sustainable development policies, the economic valuation of marine and coastal ecosystem services (ESs) has become relevant for informing decision-making processes. Through an integrated approach encompassing bibliometric, network, and content analyses, this review is aimed at analyzing the evolution trend, the main research clusters, and the research gaps of the scientific literature in the field of economic valuation of marine and coastal ESs. The bibliometric results showed that the research field is experiencing an evolving positive trend and represents a challenging research topic. From the network and overlay visualization of keyword co-occurrences, it emerged that the research clusters comprehensively address the key policy-relevant issues. In the content analysis, an examination of the estimated ESs and the economic valuation methods used by studies with the highest impact on scientific research was conducted. The findings suggest that while studies provide valuable data and insights, their practical applicability in policymaking is limited, due to contextual relevance and bias issues. Overall, the review underscores the need for a paradigm shift to better inform real-world policy decisions, identifying the Marine Spatial Planning (MSP) process as a key framework for bridging these gaps in future research and policy implementation
Andrea Bacová
No full textAndrea Bacová focuses on research and teaching in the field of residential architecture. Her work includes systematic research on residential buildings and their urban context. She actively participates in promoting Slovak architecture and is the author of several publications and exhibitions
Marcetia santosiae Almeda & R. B. Pacifico 2022, sp. nov.
No full textMarcetia santosiae Almeda & R.B.Pacifico, sp. nov. (Figs. 6–7). Type:— BRAZIL. Bahia: Abaíra, Distrito of Catolés, Chapada Diamantina, Trail to Pico do Barbado, 13°17’20.5”S, 41°53’30.5”W, 24 May 2019, fl., fr., F. Almeda 10790, R.B. Pacifico, L. Daneu & L.C. Gomes (holotype: HUEM!, isotypes: ALCB!, CAS!, CEPEC!, HUEFS!). Diagnosis:— Differs from Marcetia auricularia by the longer cauline internodes 2–22 mm long (vs. 3–8 mm long), the shorter calyx lobes 3–4 mm long (vs. 5–6 mm long) that are not auriculate (vs. auriculate), shorter petals 5–7 mm long (11–14 mm long), stamen filaments 2.5–3.5 mm long (vs. 8–9 mm long), anthers 1.8–2.2 mm long (vs. 3.5–4.5 mm long), styles 4–5 mm long (vs. 13–15 mm long), and raphal zone covering nearly 40% the length of the seed (vs. ca. 80–90% the length of the seed). Erect shrubs 0.4–1 m tall, dichotomously branched. Upper cauline internodes 2–22 mm long, light green (when fresh) or reddish becoming pale brown (when dry) and defoliated with age, quadrangular and sulcate on two of the four opposing faces, densely covered with stout glandular trichomes 0.3–1.1 mm long. Leaves decussate, moderately ascending, not concealing uppermost internodes, chartaceous to coriaceous, slightly discolored (when fresh), adaxial surface vivid green, abaxial surface pale green, both leaf surfaces becoming pale brown or reddish (when dry); petioles up to 0.8 mm long; blades 7–14 × 4–11 mm, ovate, apex rounded or slightly acute, base truncate to cordate, margin entire to inconspicuously crenulate-ciliate with hyaline trichomes up to 0.5 mm long, often flushed with red, narrowly revolute, adaxial surface densely covered with glandular trichomes 0.3–0.9, abaxial surface densely covered with glandular trichomes 0.3–1.1 mm long, the stouter trichomes concentrated on the veins, 9–11-nerved from the base (basal acrodromous), venation prominent on the abaxial surface and impressed on the adaxial surface, secondary venation not evident. Flowers 4-merous on short pedicels up to 0.5 mm long, concentrated at the apex of the branches, bracteolate. Bracteoles 2, inconspicuous, 1.5–2 × 0.4–0.8 mm, narrowly triangular, apex acute, base attenuate, densely covered with glandular trichomes 0.3–1.1 mm long on both surfaces, margin ciliate with similar glandular trichomes, 1-nerved. Hypanthia (at anthesis) 3–4 mm long, 3–4 mm wide at the torus, light green or reddish, campanulate, equaling the capsule in length at maturity, densely covered with stout glandular trichomes 0.3–1.1 mm long. Calyx tube inconspicuous, ca. 0.1 mm long. Calyx lobes 3–4 mm long, 1.5–2.6 mm wide, light green or reddish (when fresh) becoming pale brown (when dry), erect at anthesis, ovate to foliaceous, not auriculate, apex acute, margins entire and ciliate with glandular trichomes 0.3–0.9 mm long, both surfaces covered with glandular trichomes 0.3–0.9 mm long, the indumentum evenly distributed. Petals 5–7 × 6–8 mm, obovate, magenta, the base attenuate, apex obtuse, both surfaces glabrous, margins entire and ciliate with minute gland-tipped trichomes up to 0.4 mm long. Stamens 8, isomorphic, erect and clustered around the base of the style (at anthesis); filaments 2.5–3.5 mm long, white becoming red with age or following pollination, glabrous; anthers 1.8–2.2 × 0.6–0.8 mm, yellow, oblong but somewhat tapering distally, erostrate, pedoconnectives up to 0.2 mm, unappendaged. Ovary (at anthesis) ca. 1.5–1.8 × 1.2–1.4 mm, superior, subglobose, glabrous, 3-locular, 1/5 basally adnate to the hypanthium; style 4–5 mm long, magenta, glabrous, somewhat curved, stigma punctiform. Fruit at maturity a globose loculicidal capsule ca. 4–5 × 4–5 mm, pale brown, glabrous, 3-valvate, enveloping hypanthia, rupturing and flaking away with age. Seeds ca. 0.7 × 0.5 mm, brown, rounded-cochleate, testa tuberculate, raphal zone elliptic, ca. 40% the length of the seed. Additional specimens examined:— BRAZIL. Bahia: Abaíra. Distrito of Catolés, Chapada Diamantina, Trail to Pico do Barbado, 13°17’28.2”S, 41°53’48.9”W, [ca. 1543 m], 24 May 2019, fl., F. Almeda et al. 10782 (CAS!, CEPEC!, HUEM!); Catolés, caminho para a Serra do Barbado, 13°17’S, 41°50’W, 30 April 2006, fl., fr., M.L. Guedes et al. 12389 (ALCB!); Campo de Ouro Fino (baixo), 13°15’S, 41°54’W, 1600–1700 m, 10 January 1992, fl., fr., R.M. Harley et al. H50727 (HUEFS!, K-online image!, NY-online image!, SPF!); Serra do Barbado, 13°18’S, 41°54’W, 1950–2000 m, 12 January 2007, fl., fr., A.K.A. Santos et al. 970 (HUEFS!). Rio de Contas. Trilha para o Campo do Queiroz, 13°30’55.4”S, 41°56’51.7”W, 1410–1470 m, 20 May 1999, fl., fr., F. Almeda et al. 8326 (CAS!, HUFU-online image!, NY!, UEC!); estrada para Pico das Almas, ca. 24.1 km da cidade, 19 November 2000, fl., fr., J.F.A. Baumgratz et al. 742 (CEPEC!, RB!); trilha para o Pico das Almas, próximo ao Campo do Queiroz, 14 February 2012, fl., fr., J.G. Freitas et al. 763 (HUEFS!); caminho para o Pico das Almas, na subida para o Campo do Queiroz, 13°30’52”S, 41°56’54”W, 1502 m, 11 February 2002, fl., fr., R.M. Harley & A.M. Giulietti 54443 (HUEFS!); trilha para o Pico das Almas, 13°30’52.9”S, 41°56’54.6”W, 1382 m, 14 June 2022, fl., fr., R. Pacifico et al. 575 (CAS!, HUEFS!, HUEM!, RB!); trilha para o Pico do Itobira, 13°22’38.9”S, 41°53’10.6”W, 1542 m, 16 June 2022, fl., fr., R. Pacifico et al. 618 (CAS!, HUEM!, HUEFS!, RB!); Pico das Almas, trilha para o Pico das Almas, 13°30’53”S, 41°56’55”W, 1504 m, 14 February 2012, fl., fr., M.J.R. Rocha et al. 335 (BHCB, RB!); trilha na subida para o Pico das Almas, antes do Campo do Queiroz, 13°31’01”S, 41°55’35”W, 1507 m, 18 January 2003, fl., fr., A.K.A. Santos et al. 27 (HUEFS!, UEC-online image!); trilha para o Pico das Almas, 18 February 2006, fl. fr., A.K.A. Santos et al. 809 (HUEFS!); trilha para o Pico das Almas, 14 February 2012, fl., fr., A.K.A. Santos et al. 1204 (HUEFS!). Distribution, habitat and phenology:— Apparently endemic to the Chapada Diamantina, Bahia, Brazil (Appendix 2; Fig. 3). It grows in campo rupestre (Fig. 4) with rocky outcrops exposed to full sun at elevations between 1382–2000 m. Collected flowering from January to June, and fruiting in November, and from January to June (except March). Etymology:— The epithet honors professor Andrea Karla Almeida dos Santos (b. 1979–). Besides leading important field expeditions to the Chapada Diamantina, focused on Melastomataceae, Andrea Karla has described new species of Marcetia (Santos et al. 2008, 2013), authored a checklist for the family in Rio de Contas (Santos & Silva 2005) and the treatment of Marcetia for the Flora of Brazil (Santos 2022). Notes:— Marcetia santosiae is also morphologically similar to M. nummularia (Fig. 5 A–B). Both species share a dense indumentum of glandular trichomes on the internodes, abaxial leaf surfaces and hypanthia, as well as triangular calyx lobes and magenta petals. Marcetia santosiae differs by the modally longer leaf blades 7–14 mm long (vs. 6–8 mm long) that are ovate (vs. orbicular to suborbicular) and less markedly revolute, the shorter anthers 1.8–2.2 mm long (vs. 3–4 mm long) and 3-locular ovaries (vs. 4-locular). These species may occur sympatrically in Abaíra and Rio de Contas (Appendices 1–2). There appears to be no overlap in the distributions of M. santosiae and M. auricularia (Appendix 2) (for their distinctions see the diagnosis). Suggested conservation status:— Critically Endangered (CR): B1ac(iv) (Appendix 2).Published as part of Pacifico, Ricardo & Almeda, Frank, 2022, New species of Marcetia and Microlicia (Melastomataceae) endemic to the campo rupestre of Chapada Diamantina, Bahia, Brazil, pp. 39-69 in Phytotaxa 573 (1) on pages 44-47, DOI: 10.11646/phytotaxa.573.1.3, http://zenodo.org/record/732945
Effetti di diverse tipologie di inerbimento sugli aspetti qualitativi della cultivar Italia allevata a tendone in provincia di Bari
No full textIl sud Italia, in modo particolare Puglia e Sicilia , rappresenta il principale areale di coltivazione dell'uva da tavola con oltre il 90 % della produzione nazionale. AI fine di ottenere una gestione sempre più sostenibile sia dal punto di vista ambientale sia economico e nello stesso tempo ottenere produzioni di qualità, negli ultimi anni sono state avviate delle sperimentazioni per una gestione del terreno eco-compatibile con pratiche quali inerbimento, pacciamatura, ecc . Da anni sono disponibili risultati di sperimentazioni e applicazioni su vite da vino specialmente in ambienti settentrionali; invece molto limitate e quasi scarse sono le infoomazioni per la viticoltura da tavola. Attualmente si sta diffondendo, anche negli ambienti del meridione d'Italia, la tecnica dell'inerbimento sia naturale sia artificiale per diverse specie arboree da frutto. Sulla base di queste considerazioni si è pensato di impostare una prova di inerbimento in un vigneto di vite ad uva da tavola in Puglia. La prova è iniziata nell'annata 2009/2010 in un vigneto commerciale di cinque anni condotto in irriguo e sito in agro di Acquaviva delle Fonti (BA). La cultivar utilizzata nella prova è Italia, innestata su 1103P, e la fooma di allevamento il tendone. Le tesi messe a confronto sono state: TI, inerbimento con trifoglio sotterraneo (Trifolium subterraneum L.); T2, inerbimento con festuca (Festuca arundinacea Schreb.); TI , inerbimento naturale; T4 , controllo lavorato. I risultati del primo anno della sperimentazione, tuttora in corso, mostrano che non sono emerse differenze significative tra le tesi a confronto per le caratteristiche biometriche della bacca e per la produzione di uva/ceppo, quest'ultima variata tra i 23,03 kg del controllo lavorato ed i 25,76 kg dell'inerbimento naturale. La colorazione della buccia della bacca ha presentato invece delle differenze statisticamente significative: il valore della luminosità (L*) nelle tesi inerbite con trifoglio (41,59) e festuca (41 ,03) è stato superiore rispetto all'inerbimento naturale (39,63) ed al controllo lavorato (40,41). La saturazione (C*) è risultata significativamente più bassa nel controllo lavorato rispetto alle tesi inerbite , mentre la tinta (h°) non ha mostrato differenze tra le tesi. L'inerbimento non ha influito, in generale, sulla consistenza della bacca ed anche per gli altri parametri chimici (°Brix, pH, acidità titolabile) non sono state rilevate differenze degne di rilievo tra i dati ottenuti per le diverse tesi
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