1,721,109 research outputs found
The k 0-INRIM software: a tool to compile uncertainty budgets in neutron activation analysis based on k 0-standardisation
Full text linkA software package was developed to evaluate the uncertainty of results provided by neutron activation laboratories adopting the k0-standardisation method in trace elements analysis.
The outputs are stand-alone and editable spreadsheet budgets based on a measurement equation including more than 40 input quantities and written to consider the effect of correlations. The program, called k0-INRIM, is presented to potential users and freely
distributed alongside the user’s manual.
The measurement equation is reported and the main features are described together with the results obtained in a validation test. An uncertainty budget compiled using the software output is given as an example
Egg capsules of Atlantoraja cyclophora (Regan, 1903) and A. platana (Günther, 1880) (Pisces, Elasmobranchii, Rajidae)
No full textOddone, M. C., Marçal, A. S., Vooren, C. M. (2004): Egg capsules of Atlantoraja cyclophora (Regan, 1903) and A. platana (Günther, 1880) (Pisces, Elasmobranchii, Rajidae). Zootaxa 426: 1-4, DOI: 10.5281/zenodo.15882
New chemical and petrographic data of some undersaturated lavas from Nyiragongo and Mikeno (Virunga-Western African Rift - Zaire).
No full textErratum: The k0-INRIM software: A tool to compile uncertainty budgets in neutron activation analysis based on k 0-standardisation (Measurement Science and Technology (2020) 31 (017002) DOI: 10.1088/1361-6501/ab358f)
No full textThis corrigendum addresses a mistake spotted in our original manuscript [1]. In particular, a typing error was identified in the reported model equation that k0-INRIM software implements to compute the analyte mass fraction, wa, via the k0-standardisation method
An uncertainty spreadsheet for the k0-standardisation method in Neutron Activation Analysis
Full text linkThis paper focuses on the use of the spreadsheet technique to set up the uncertainty budget for the k0-standardisation
method in Neutron Activation Analysis. The adopted measurement model included most of presently recognized error
sources and was written to limit the covariances between input quantities. The calculations were implemented in a
worksheet file and tested in a multi-elemental analysis of a biological material. Besides, it was demonstrated that the k0-
standardisation turns to the relative-standardisation when the monitor element corresponds to the analyte element. The
developed worksheet is available and suitable for the analysis of other materials in different experimental conditions
The k 0-INRIM software: a tool to compile uncertainty budgets in neutron activation analysis based on k 0-standardisation
Full text link
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Keeping the track of quality: authentication and traceability studies on wine
No full textThe quality of a wine is one of the most valuable features in the consumer’s view. This is a consequence of a higher level of knowledge and culinary education among consumers: most people are now definitely ready to spend some more money to yield a higher quality product. At present, though, this feature seems not to be a matter of strict control from governments. In so many times laws have been violated that it is impossible not to see how inefficiently the present regulations on wine are working. The number of sophistication procedures is increasing constantly and becoming sophisticated and hard to recognize. More strict analytical controls should be developed and routinely used. An important concept in this field is traceability. In commodity economics this concept means “monitoring of goods fluxes from raw materials to the consumers’ table” but this process is only based on production of documentation, easily subjected to falsification. Here traceability is expressed in a different way than before: in the chemical sense, traceability means to individuate chemical markers to find a link among the geographical zone where a wine is made and the final product of winemaking process, i.e. wine itself. It is mandatory that analytical techniques should be used to fulfill this task. The condition for this to happen is that wines grown on different zones should carry with them a fingerprint from soil to the bottle to be expressed in chemical terms, be it isotope ratios or elemental distributions. As long as this fingerprint is not altered along the whole winemaking process, its recognition could allow one to check whether a wine had been effectively produced in a certain area.
Another key feature in wine research is authentication, a concept expressing the possibility to identify and discriminate true samples from false samples. This concept, though not being a synonym of traceability, points to the same direction, i.e. quality.
Among the different techniques available for wine analysis and control, two seem to be highly promising for fingerprint recognition and authentication: isotope ratio – MS for determination of light and heavy elements and ICP-MS for determination of trace and ultra-trace concentrations of elements acting as markers, with particular focus devoted to lanthanides. An increasing amount of publications is being devoted in the last years to the application of these techniques to wine authentication and traceability, a review of state-of-the-art of which is the task of the present work
Fig. 1 in Size composition, monthly condition factor and morphometrics for fishery-dependent samples of Rioraja agassizi (Chondrichthyes: Rajidae), off Santos, Southeast Brazil
No full textFig. 1. Map of the study area, southeast Brazil, south-western Atlantic Ocean. Symbols represent all the fishing hauls from where samples of Rioraja agassizi were collected.Published as part of Oddone, M. Cristina, de Amorim, Alberto F., Mancini, Patrícia L. & Norbis, Walter, 2007, Size composition, monthly condition factor and morphometrics for fishery-dependent samples of Rioraja agassizi (Chondrichthyes: Rajidae), off Santos, Southeast Brazil, pp. 415-424 in Neotropical Ichthyology 5 (3) on page 416, DOI: 10.1590/S1679-62252007000300021, http://zenodo.org/record/541941
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