101,870 research outputs found
Water masses and nutrient distribution in the Gulf of Syrte and between Sicily and Libya
No full textThis paper analyzes for the first time the water masses circulation in the Gulf of Syrte (Libya) and along a Sicily-Libya transect (central Mediterranean Sea) based on a new dataset of hydrological and nutrients data. The collected dataset highlights the presence of three main water masses with different chemical-physical features: Atlantic Water, Levantine Intermediate Water and Deep Water. Atlantic Water shows an intrusive low-salinity water near the Sicilian (≤. 37.6) and Libyan coasts (≤. 37.8), linked to the Atlantic Ionian Stream and the Atlantic Libyan Current respectively. The surface circulation evidences meandering structures throughout the area and the presence of an anti-cyclonic vortex in the central part of the Gulf of Syrte. In this latter area no coastal surface current is recognized, suggesting a seasonal character for such coastal circulation. In the Gulf the anti-cyclonic pattern characterizes also the intermediate water circulation. The nutrient distribution confirms the oligotrophic character of the area with a strong reduction in concentration in the surface layer due to the assimilation of phytoplankton in the euphotic zone. Furthermore, there is an evident increase in the deep water caused by the re-mineralization of organisms. The nitrate:phosphate ratio is ~. 10 and ~. 30 in the surface waters and deep waters, respectively, the latter being far in excess of the Redfield ratio (16:1) found in the oceans' deep waters. Nutrients data close to the Libyan coast do not show any enrichment pattern as a potential effect of the input of Saharan dust. © 2013 Elsevier B.V
ENEA internal best practices for seawater total suspended solids measurement: experimental assessment of measurement uncertainty and correlation with turbidity. Test case in a near shore area (Ligurian Sea, La Spezia Gulf)
No full textTotal Suspended Solids (TSS) is considered a very important oceanographic quantity to describe the status of the seawater column. The ENEA Marine Environment Research Centre of S. Teresa, devoted since the ‘70s to the monitoring, analysis and comprehension of physical, chemical and biological processes in marine environment, has therefore developed an historical experience also in TSS measurement. Aim of the present work is to collect ENEA expertise and internal procedure related to experimental TSS measurement, formalizing in particular the assessment of TSS measurement uncertainty in accordance with reference guidelines and standards. The contribution of mass and volume in the laboratory-based gravimetric method to measure TSS (by filtering process) has been analysed, together with the effect due to repeatability proper of this type of experimental activity. TSS combined standard uncertainty has been finally evaluated, and just the repeatability contribution proved to be the most relevant one (about 10 % in terms of relative standard uncertainty). The link between TSS and Turbidity, continuously optically measured along the water column, is also discussed. Turbidity of a water sample can in fact be used to infer the mass of particles in suspension by means of a sort of a calibration curve that relates TSS to Turbidity itself. This relation can be reasonably approximated by a linear model, whose slope is sample-dependent: consequently, the conversion from a Turbidity profile to a TSS one has to be determined each time. Results prove that this consolidated approach can be applied in the near-shore area, where ENEA performs its monitoring campaigns. The present technical report is intended to serve as a basis for developing procedures more and more compliant to international metrological standards, with the aim of further guaranteeing the metrological traceability of oceanographic quantities
Determinazione del tasso di crescita dell'alga Corallina Elongata in ambiente controllato e in ambiente naturale tramite l'utilizzo dei marcatori Alizarin (red) e Calcofluor White
No full textQuarant'anni di dati oceanografici a cura del Centro Ricerche Ambiente Marino ENEA S. Teresa: il quadro del golfo di La Spezia. Distribuzione storica dei dati dal 1973 al 2013
No full textFin dagli anni‘80, presso il Centro ENEA CRAM S. Teresa (SP), è in funzione una banca dati che ha lo scopo di raccogliere ed archiviare i dati oceanografici ed ambientali relativi al Mediterraneo. I dati vengono archiviati secondo la direttiva INSPIRE (Infrastructure for Spatial Information in the European Community), dopo esser stati sottoposti a controllo di qualità. E’ possibile consultare il database e scaricare i dati pubblici accedendo al sito web: http://www.santateresa.enea.it. In particolare, in questo rapporto è riportata una panoramica spazio-temporale del tipo e della quantità di dati presenti nell’area del Golfo di La Spezia, dove il Centro ENEA S. Teresa è particolarmente attivo.Since’80s a web data centre has been working in the S. Teresa CRAM ENEA Centre to collect and archive the main oceanographic parameters in the Mediterranean Sea. Data are stored in accordance with the INSPIRE directive (Infrastructure for Spatial Information in the European Community), after a quality control procedure. Oceanographic variables and data can be downloaded and plotted at the web address: http:// www.santateresa.enea.it. This report presents the geo-temporal distribution of the data acquired during the year 1973-2013 in the Gulf of La Spezia area, where ENEA is particularly active. Data are detailed according to type and occurrences
Bibliographie Hilarion G. Petzold 1958 – 2009 mit Anhang als Einführung
No full textDieses Archiv enthält die Gesamtbibliographie der Werke des Autors nebst einiger Texte „Über H. G. Petzold“ im Schlussteil der Bibliographie sowie einen Anhang mit einer Einführung in die Architektur des Werkes in seinem wissenslogischen Aufbau als Ausarbeitung seines „Tree of Science Modells“ (2007).This archive contains the complete bibliography of the author and some texts about H. G. Petzold, moreover an epilogue with an introduction to the architecture of the works in its epistemological structure and composition and as an elaborations of Petzold’s „Tree of Science Modell (2007).https://www.fpi-publikation.de/polyloge/01-2009-petzold-h-g-gesamtbibliographie-h-g-petzold-1958-2009-updating-november2009/peerReviewedpublishedVersio
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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3346: Samuel G. Freedman, author, 2013
No full textPhotograph of author Samuel G. Freedman, at NT Daily Slash meeting in the Mayborn School of Journalism at UNT
The Right to Strike under the United States Constitution: Theory, Practice, and Possible Implications for Canada
No full textAnswering critics of the Canadian Supreme Court's judgment in B.C. Health, the author argues that the Court laid the foundation for a principled and durable doctrine protecting constitutional labour rights, one that goes directly to the heart of the matter — the inequality of workers’ power in the employment relation. In the author’s view, two paths could lead from B.C. Health to the recognition of Charter protec- tion for a right to strike: one that treats the right as an accessory to col- lective bargaining, and one that upholds the right directly on the basis of the Charter values of equality and participation. The author supports the latter approach, contending that constitutional rights should be defined in relation to fundamental values, in a way that is not contingent on time-bound or fact-sensitive assessments about the role of strikes within a particular collective bargaining regime. Although a Charter right to strike may involve the courts in difficult choices about when to defer to legislative policy decisions, and courts may lack the institutional capac- ity to deal effectively with labour law issues, the author points out that judges can look to ILO standards for expert guidance. Noting that the U.S. experience in this area might be of considerable use to Canadians, the author concludes by providing an overview of American case law concerning a constitutional right to strike.Peer reviewe
G-Rank: Unsupervised Continuous Learn-to-Rank for Edge Devices in a P2P Network
No full textRanking algorithms in traditional search engines are powered by enormous training data sets that are meticulously engineered and curated by a centralized entity. Decentralized peer-to-peer (p2p) networks such as torrenting applications and Web3 protocols deliberately eschew centralized databases and computational architectures when designing services and features. As such, robust search-and-rank algorithms designed for such domains must be engineered specifically for decentralized networks, and must be lightweight enough to operate on consumer-grade personal devices such as a smartphone or laptop computer. We introduce G-Rank, an unsupervised ranking algorithm designed exclusively for decentralized networks. We demonstrate that accurate, relevant ranking results can be achieved in fully decentralized networks without any centralized data aggregation, feature engineering, or model training. Furthermore, we show that such results are obtainable with minimal data preprocessing and computational overhead, and can still return highly relevant results even when a user’s device is disconnected from the network. G-Rank is highly modular in design, is not limited to categorical data, and can be implemented in a variety of domains with minimal modification. The results herein show that unsupervised ranking models designed for decentralized p2p networks are not only viable, but worthy of further research.https://github.com/awrgold/G-RankComputer Scienc
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