1,720,996 research outputs found
Retail stores policies for marketing of lobsters in Sardinia (Italy) as influenced by different practices related to animal welfare and product quality
No full textA heuristic algorithm based on routing decisions for the No-Wait Flexible Job-Shop scheduling problem
Full text linkIn the field of Scheduling Optimization, the Job-Shop scheduling problem entails a high level of complexity and is often solved with the aid of metaheuristic algorithms. In its Flexible version it is possible to choose the machine which wil l execute a specific operation. In this scenario both the scheduling and the routing problem need to be solved when aiming to optimize the production makespan. Many optimization approaches account for the routing decision by encoding it in addition to the job ordering, to let the metaheuristic algorithm account for this decision. The No-Wait Flexible Job-Shop is a variant of the problem characterized by consecutiveness constraints among operations, which need to start directly after the previous one's completion time. These constraints can be encountered for example in the pharmaceutical and metallurgic sector. In this context Timetabling Algorithms are used to decode the solution and provide a makespan given a schedule. In this paper, an approach to exploit the Timetabling Algorithm routing capabilities is discussed, in order to investigate which decision level of the optimization procedure shall execute the routing selection. Finally, possible experimental settings to validate the most convenient routing strategy are discussed
Mislabeling in seafood products sold on the Italian market: a systematic review and meta-analysis
Full text linkIn this study the results of a systematic review and meta-analysis on mislabeling in seafood products sold on the Italian market are presented The aim was especially targeted to answer the research question “What is the mislabeling rate in seafood products sold on the Italian market?“. Scientific papers (SPs), were filtered using pre-determined inclusion criteria and data related to sampling and mislabeling was analysed. Samples were categorized according to their taxon (species, family order) or generic market group (MG), market form (unprocessed/processed), distribution channel and geographical area. Samples were considered mislabeled when the species found by molecular analysis did not comply the information indicated in the label. The mislabeling rate (m. r.) was weighted on the sample size and provided overall and for each category. In the 51 selected SPs (published from 2005 to 2022) the most sampled taxa were fish (83.8%): mackerels, cods, herrings, flatfishes and jacks were the most represented. Unprocessed fillet/slice was the most analysed market form (61.4%), and samples were especially collected at retails (76.5%). Ten regions were sampled, especially Tuscany and Apulia. The overall weighted m. r. was 28.4% (CI 26%–30%), falling within the m. r. range found at international level (Luque & Donlan, 2019). M. r. over the CI (>30%) were observed in 1) jellyfishes, European perch, European grouper, Atlantic mackerel and samples labeled as “spinarolo”, “baccalà” or “palombo”; 2) Unprocessed fresh, processed salted and highly processed samples; 3) small distribution channel; 4) Southern regions. Significative differences in m. r. concerned taxa, distribution channels and geographical areas. Despite some bias of the SPs may affect the results (lack of sampling plans; poor data on molluscs and crustaceans; no standardization in m. r. interpretation) this is the first systematic review and meta-analysis that, synthesizing evidence on Italian seafood mislabeling, can support policy making for minimizing frauds impacts
Lesioni cervicali non cariose e restauri di V classe: ripercussioni sulle condizioni paradontali [Non-carious cervical lesions and class V restorations: Impact on periodontal conditions]
No full textObjectives. The aim of this study was to assess the prevalence of noncarious
cervical lesions (NCCL) in a group of patients, relating their etiology
with oral hygiene, eating habits, systemic or local diseases and investigate
the clinical effects of Class V restorations of NCCL on periodontal
conditions.
Materials and methods. 10 patients—aged from 36 to 56—affected by
tooth cervical lesions were recruited in accordance with specific inclusion
and exclusion criteria. At the baseline examination, periodontal parameters
(PPD, BOP, IP, dental sensitivity) of the teeth affected by NCCL were measured.
Each tooth with NCCL was randomly assigned to the test or the control
group. The teeth in the test group were restored with composite resin. No
treatment was performed on the teeth of the control group. Six months
later, the periodontal parameters were repeated. The obtained data were
submitted to statistical analysis.
Results. NCCL were found to be predominantly associated with incorrect
oral hygiene habits and to a lesser extend to the presence of parafunctions.
Six months after the treatment, t-tests for paired observations revealed
that (a) PPD significantly decreased, as expected, in the test group (p ≤
0.001) but not in the control group where a worsening was recorded (p
≤ 0.009); (b) BOP significantly decreased, as hypothesized, in the test
group (p < 0.001), whereas it increased in the control group (Wilcoxon: Z
= –2.03; p < 0.043); further, also the expected difference between BOP
test and control group after six months from treatment was statistically
significant (p ≤ 0.006); (c) unexpectedly, PI significantly decreased both in
the test (p ≤ 0.012) and in the control group (p ≤ 0.017); (d) dental sensitivity
diminished in the test group after six months (Wilcoxon: Z = –2.42;
p ≤ 0.016), and it was also significantly lower than that of the control group
after six months from treatment (Wilcoxon: Z = –2.59; p ≤ 0.001)
Analysis of the sanitary survey 2015-2017 conducted in the Gulf of La Spezia (Italy): reclassification of the areas of production of live bivalve molluscs.
Full text linkThe sanitary survey is aimed at classify-ingNoand monitoring the production areas of live bivalve molluscs (LBM) and it is performed using standards that are provided by the Centre for Environment, Fisheries and Aquaculture Science’s Guide to Good Practice. In this study, data from the sanitary survey carried out by the Asl5 Spezzino on the production areas of the gulf of La Spezia during the period 2015-2017 were analysed. The number and type of the analysis performed both on the total sampling and on the individual target species, as well as the number and type of found non-com-pliance (assessed on both mandatory parameters and on parameters fixed by the local monitoring plan) were considered. Data were also compared with those from the sanitary survey 2012-2014. Appropriate statistic tests were used to evaluate data from E. coli and Norovirus monitoring. Overall, 4306 analysis were performed, especially on the species M. galloprovin-cialis (89%) and they were mostly focused on to the search of biological agents. 160 NC were detected. Most of the NC concerns the Norovirus’s positivity (93.75%) in M. galloprovincialis and C. gigas. A correlation between the levels of E. coli and rain-fall/seasonality (higher levels in the colder months) was proved, especially in the sampling points located in the inner part of the dam and in the Portovenere Bay. Class B was reconfirmed for M. galloprovincialis, the production areas of C. gigas were reclassified as A and those of V. verrucosa were definitively closed. The sanitary sur-vey was therefore confirmed as a useful tool for reclassification and for monitoring LBM production areas
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
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe 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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