Search results for "COD"
showing 10 items of 2985 documents
Resource or waste? A perspective of plastics degradation in soil with a focus on end-of-life options.
2018
‘Capable-of-being-shaped’ synthetic compounds are prevailing today over horn, bone, leather, wood, stone, metal, glass, or ceramic in products that were previously left to natural materials. Plastic is, in fact, economical, simple, adaptable, and waterproof. Also, it is durable and resilient to natural degradation (although microbial species capable of degrading plastics do exist). In becoming a waste, plastic accumulation adversely affects ecosystems. The majority of plastic debris pollutes waters, accumulating in oceans. And, the behaviour and the quantity of plastic, which has become waste, are rather well documented in the water, in fact. This review collects existing information on pla…
PROFILI DI TECNICA NORMATIVA NELLA CODIFICAZIONE DEL PRINCIPIO GENERALE ANTIABUSO
2014
FRAMMENTAZIONE DEI PROCEDIMENTI AMMINISTRATIVI EUROPEI DI SETTORE. VERSO UN LORO COMPLETAMENTO UNITARIO GRAZIE AD UNA CODIFICAZIONE GENERALE?
2017
ANALISI SETTORIALE DI PROCEDIMENTI AMMINISTRATIVI EUROPEI COMPOSTI
Multiple Cost Functions and Regularization Options for Improved Retrieval of Leaf Chlorophyll Content and LAI through Inversion of the PROSAIL Model
2013
Abstract: Lookup-table (LUT)-based radiative transfer model inversion is considered a physically-sound and robust method to retrieve biophysical parameters from Earth observation data but regularization strategies are needed to mitigate the drawback of ill-posedness. We systematically evaluated various regularization options to improve leaf chlorophyll content (LCC) and leaf area index (LAI) retrievals over agricultural lands, including the role of (1) cost functions (CFs); (2) added noise; and (3) multiple solutions in LUT-based inversion. Three families of CFs were compared: information measures, M-estimates and minimum contrast methods. We have only selected CFs without additional parame…
Letter Throughput and Delay Analysis of the Ideal Window
1999
We consider the problem of random access communications over a time slotted channel with feedback of infinitely multiplicity at the beginning of each collision resolution interval (CRI), i.e., users know via instantaneous feedback the number of users involved in that collision. Once this is known, the resolution algorithm (CRA) operates with binary (successful / non successful, s/ns) feedback. The analysis of this simple full feedback sensing window random access algorithm, named ideal window stabilized ALOHA, (IWSA), algorithm, provides a throughput of 0.5052 packets/slot, Its delay is also analyzed and compared with similar algorithms.
Marine Ostracods of the Upper Miocene of the Well Ashtart 1 (Gulf of Gabès, Southeastern Tunisia)
1988
We studied the ostracod fauna from a Late Miocene-Early Pliocene interval 600 m thick, in Ashtart 1, an offshore well in the Gulf of Gabes, southeastern Tunisia. Most of the 131 samples analyzed contained rich and much diversified populations of marine ostracods. In fact, 212 species have been found, belonging to 70 genera. Among them, eight genera, 122 species and subspecies, considered as new, will be described elsewhere. In spite of contamination, usual in oil wells due to caving from higher levels previously drilled, some stratigraphical and palaeoenvironmental features have been established. The last occurrence datum of a selected group of species has been defined with accuracy, and so…
LOCHKOVIAN TO PRAGIAN (LOWER DEVONIAN) NERITIC OSTRACODES FROM NIGÜELLA (ZARAGOZA, IBERIAN CHAINS, NE SPAIN)
2021
Lochkovian and Pragian ostracodes from the area of Niguella (Iberian Chains), which is a key area for supra-regional correlation in the Early Devonian, are described for the first time. 12 ostracode taxa from the sections Ni4 and Ni2 could be identified. The silicified ostracodes of Eifelian Ecotype are low in biodiversity, have few individuals, and are comparatively poorly preserved. Characteristic taxa of the Devonian occur. Thus, the faunas show general relations to most European Early Devonian ostracode faunas. Closer relations exist to the Eastern Guadarrama. Polyzygia kroemmelbeini LeFevre & Weyant, 1967 and P. grekoffi Weyant, 1980 are found in the basal Pragian for the first time. B…
Biostratigraphy and palaeobiogeography of the Cambrian genusHipponicharion (Ostracoda)
2002
The bradoriid genusHipponicharion Matthew, 1886 is one of the oldest known Cambrian ostracods. Until now, five species have been documented and another three taxa have been tentatively assigned to one or another species.Hipponicharion has been recorded from Poland, Germany, Morocco as well as from Canada and Great Britain.Hipponicharion hispanicum n. sp. represents the first Cambrian ostracod documented from Spain.Hipponicharion taidaltensis n. sp., formerlyH. aff.geyeri Hinz-Schallreuter, 1993 andH. elickii n. sp., formerlyH. cf.eos sensuElicki, 1994 have also been restudied in this paper.Hipponicharion seems to be restricted to the Acadobaltic Province sensuSdzuy (1972). The systematic re…
Estratigrafía y paleontología del yacimiento QUIN-18 (Formación Valmayor, Frasniense, sinclinal de Almaden, España)
2021
n el núcleo del Sinclinal de Almadén (Ciudad Real, España) aflora una potente sucesión vulcano-sedimentaria (Complejo Vulcano-Sedimentario de Chillón), que se apoya sobre una sucesi6n esencialmente limo-pelÍtica (Fm. Yalmayor), ambas frasnienses, en el techo de esta ultima se encontr6 el yacimiento QUIN- I 8, especialmente rico en braquiópodos y ostrácodos fósiles. La edad indicada por estos correspondería a la parte alta de la Zona de Mesotaxis asymmetricus Media hasta la Zona de M. asymmetricus Superior (parte alta de la Zona de Palmatolepis punctata a la Zona de P. hassi Inferior, en la zonación estandar de conodontos).
 Los ostrácodos pertenecen al llamado ecotipo (ökotyp) eifélico…