15 research outputs found
Large-scale movements in the oceanic environment identify important foraging areas for loggerheads in central Mediterranean Sea
No full textLoggerhead sea turtles (Caretta caretta) are known to display a wide range of movement patterns during the different stages of their life cycle, but empirical information to document this extensive behavioural plasticity is still limited. This is especially true for large, adult-sized individuals, that are thought to mainly forage in neritic areas. In the present paper, eight adult-sized loggerhead turtles were tracked using satellite telemetry to identify the location of their foraging grounds in the seas along the western coast of the Italian peninsula. Tracked turtles mostly stayed in the region between the Italian peninsula and the islands of Sicily and Sardinia, that was reached following quick, directed movements by the turtles from a release site to the north. In this area, two turtles took up residence in spatially limited neritic sites along the coast, while the remaining six alternated circumscribed coastal stays with long-distance, circuitous movements in the oceanic environment. An utilization distribution analysis clearly identified an area, mostly comprising oceanic waters, that was continuously used by turtles in different seasons and years. The present results contribute to the still-limited knowledge of the spatial ecology of loggerheads frequenting the Western Mediterranean Sea and highlight the presence of a potentially important oceanic region in the Southern Tyrrhenian Sea where adult-sized turtles forage for extended periods. These findings increase our knowledge of complex life history traits of loggerhead turtles and provide important information to be considered for evidence-based conservation measures
Microplastics evidence in yolk and liver of loggerhead sea turtles (Caretta caretta), a pilot study.
No full textThe potential toxicity of microplastics is a growing concern for the scientific community. The loggerhead sea turtle (Caretta caretta) is particularly inclined to accidently ingest plastic and microplastic due to its long-life cycle features. The possible transfer of microplastics from the female to the eggs should be investigated.The present study investigated the presence of microplastics in yolk and liver samples evaluating the number of melanomacrophages in the hepatic tissue as a possible biomarker of microplastics impact on the embryonic health status. The biometric parameters and liver histological analysis of 27 and 48 embryos (from two different nests respectively) at the 30 stage of development were analyzed. Raman Microspectroscopy was performed to identify the microplastics after alkaline digestion (10% KOH) of yolk and portion of liver from 5 embryos at the 30 developmental stage per nest. Microplastics were found in yolk and liver of loggerhead sea turtles at late embryonic stage for the first time. All microplastics were smaller than 5 mu m and were made of polymers and colors suggesting their diverse origins. A total number of 21 microplastics, with dimensions lower than 5 mu m, were found between the two nests (11 and 10 microplastics respectively). Only two shape categories were identified: spheres and fragments. The most frequent polymers observed were polyethylene, polyvinyl chloride and acrylonitrile butadiene styrene (31.5%, 21.1% and 15.8% respectively). Despite the eggs showing a higher number of microplastics in yolk samples than liver (15 and 6 microplastics in yolk and liver respectively), a positive correlation was observed only between the number of melanomacrophages (r = 0.863 p < 0.001) and microplastics in the liver. This result may suggest that microplastics could exert some effects on the hepatic tissues. Future studies should investigate this aspect and the possible relation between microplastics and other stress biomarkers
Driving Process Innovation: A Structured Method for Improving Efficiency in SMEs
No full textAbstractThis paper proposes a method to drive process innovation toward the increase in efficiency of a production plant.The work defines a structured method, supported by a classification tool, to correctly organize whole plant information with a mayor focus on energy consumptions. The method was tested in a medium enterprise with the target to increase the efficiency of the entire production plant. The method is the basis for a web application tool. A correct data management permits to plan the best practices to improve processes and systems involved in terms of environmental and economic impacts, meaning a process sustainable innovation
Consumers vs Internet of Things: A Systematic Evaluation Process to Drive Users in the Smart World
No full textAbstractSmart Objects (SOs) market offers a wide variety of products apparently similar but characterized by different features that the average users fail to perceive. Consequently, their purchasing is often based on price and brand affection. In this context, users need a tool able to guide them in choosing the most suitable object to satisfy their expectations. To this purpose, this paper proposes a new systematic method to assess SOs in a comprehensive way: it allows to objectively assess and compare products and provides evaluation results tailored on users’ needs. A first validation is carried out on three different SO typologies
Flexible structures in river and stream training works and earth retaining works, using Maccaferri gabions and Reno mattresses
No full textSet of design manuals for the use of gabions and mattresses in river and channel training works. The four volumes focus on: - Flexible structures in river and stream training works (section 1, weirs for river training and water supply); - Flexible linings in Reno mattresses and gabions for canals and canalized water courses; - Flexible gabion structures in earth retaining works; - Flexible gabion and Reno mattress structures in river and stream training works (section 2, longitudinal structures)
The macroeconomics of age-varying epidemics()
No full textWe incorporate age-specific socio-economic interactions in a SIR macroeconomic model to study the role of demographic factors for the COVID-19 epidemic evolution, its macroeconomic effects and possible containment measures. We capture the endogenous response of rational individuals who choose to reduce inter- and intra-generational social interactions, consumption- and labor-related personal exposure to the virus, while not internalizing the impact of their actions on others. We find that social distancing measures targeted to the elderly (who face higher mortality risk and are not part of the labor force) are best suited to save lives and mitigate output losses. The optimal economic shutdown generates small gains in terms of lives saved and large output losses, for any given type of social distancing. These results are confirmed by calibrating the model to match real epidemic and economic data in the context of a scenario exercise
Self-adaptive Multi-purpose Modular Origami Structure
No full textAbstractA research line in architecture and interior design has been focused for years on the selection of materials with properties specifically tailored for light, thermal and acoustic comforts. An adaptive origami-based structure is here proposed in order to overcome the limited capability of a single material to adjust its response to environmental changes. Such structure is highly flexible, with applications ranging from indoor to outdoor environments. We focus on building facades, to show some results relevant to a small-scale prototype aimed to provide shading to the sunlight
Flexible linings in Reno mattress and gabions for canals and canalized water courses
No full textThe intention ofthis man ua I is to give basic information and to study some new criteria which has been evolved for the design of gabion and Reno mattress linings for open channels and canalized waterways. Recently, tests to full and model scales have been made by the undermentioned bodies: - Hydraulic Laboratory Engineering Research Center, Colorado State University (Fort Collins - USA) - Sogreah Ingenieurs Conseils (Grenoble - France) - Delft Hydraulics Laboratory (Netherlands) The results of the tests and the interpretation of them to formulate a new approach to design are discussed in the following pages. Officine Maccaferri S.p.A. consider that the information given will simplify the work of engineers involved in the design of gabion linings and their confidence in the material which, as is weil known, is being increasingly used throughout the world. The major problems encountered in channel design and their solutions are outlined in a number of actual examples of completed schemes. Construction techniques which will be of interest to contractors are also described. For a fuller and detailed study of the subject, the reader should refer to the publications and papers listed in the bibliography. At the same time, Officine Maccaferri S.p.A. will be pleased to give assistance in fïnding a solution to any specific problem by making available the experience it has acquired over the last century.KWP-collectio
Large-scale movements in the oceanic environment identify important foraging areas for loggerheads in central Mediterranean Sea
No full textSubgroup comparison according to clinical phenotype and serostatus in autoimmune encephalitis: a multicenter retrospective study
No full textBackground and purpose: Autoimmune encephalitides (AE) include a spectrum of neurological disorders whose diagnosis revolves around the detection of neuronal antibodies (Abs). Consensus-based diagnostic criteria (AE-DC) allow clinic-serological subgrouping of AE, with unclear prognostic implications. The impact of AE-DC on patients' management was studied, focusing on the subgroup of Ab-negative-AE.
Methods: This was a retrospective multicenter study on patients fulfilling AE-DC. All patients underwent Ab testing with commercial cell-based assays (CBAs) and, when available, in-house assays (immunohistochemistry, live/fixed CBAs, neuronal cultures) that contributed to defining final categories. Patients were classified as Ab-positive-AE [N-methyl-d-aspartate-receptor encephalitis (NMDAR-E), Ab-positive limbic encephalitis (LE), definite-AE] or Ab-negative-AE (Ab-negative-LE, probable-AE, possible-AE).
Results: Commercial CBAs detected neuronal Abs in 70/118 (59.3%) patients. Testing 37/48 Ab-negative cases, in-house assays identified Abs in 11 patients (29.7%). A hundred and eighteen patients fulfilled the AE-DC, 81 (68.6%) with Ab-positive-AE (Ab-positive-LE, 40; NMDAR-E, 32; definite-AE, nine) and 37 (31.4%) with Ab-negative-AE (Ab-negative-LE, 17; probable/possible-AE, 20). Clinical phenotypes were similar in Ab-positive-LE versus Ab-negative-LE. Twenty-four/118 (20.3%) patients had tumors, and 19/118 (16.1%) relapsed, regardless of being Ab-positive or Ab-negative. Ab-positive-AE patients were treated earlier than Ab-negative-AE patients (P = 0.045), responded more frequently to treatments (92.3% vs. 65.6%, P < 0.001) and received second-line therapies more often (33.3% vs. 10.8%, P = 0.01). Delays in first-line therapy initiation were associated with poor response (P = 0.022; odds ratio 1.02; confidence interval 1.00-1.04).
Conclusions: In-house diagnostics improved Ab detection allowing better patient management but was available in a patient subgroup only, implying possible Ab-positive-AE underestimation. Notwithstanding this limitation, our findings suggest that Ab-negative-AE and Ab-positive-AE patients share similar oncological profiles, warranting appropriate tumor screening. Ab-negative-AE patients risk worse responses due to delayed and less aggressive treatments
