1,215 research outputs found

    Autonomous take-off and landing for unmanned aircraft system: Risk and safety analysis

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    The aim of this paper is to conceive the possibility of applying the Required Navigation Performance (RNP) requirements where Global Navigation Satellite System (GNSS) augmentations are considered for the Automatic Take-Off and Landing (ATOL). An aircraft, belonging to the Medium Altitude Long Endurance (MALE) category of Unmanned Aerial System (UAS) has been considered as case-study. Once the avionic architecture has been designed, the Safety and risk analysis was carried out with a particular focus on Functional Hazard Analysis and Fault Tree Analysis techniques. The proposed methodology allows the researchers to evaluate the reliability of each avionic equipment and the safety level of the whole avionic system. Furthermore, the results pointed out the main criticalities of the architecture and some future in-depth studies are proposed

    Sporotrichoid Mycobacterium marinum infection in an elderly woman

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    We describe the case of an elderly woman who acquired a Mycobacterium marinum infection following skin exposure to the bacteria through a small wound on her right ring finger, obtained while preparing fish. The resultant sporotrichoid nodules of the right hand and the distal forearm, refractory to the initial therapy with doxycycline and rifampicin, were successfully treated with oral regimen of clarithromycin

    Cutaneous melanoma frequencies and seasonal trend in 20 years of observation of a population characterised by excessive sun exposure

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    Background: Cutaneous melanoma is an aggressive form of skin cancer. It has become an increasingly common neoplasm in the most developed countries, especially among individuals of European origin. Methods: Anonymous data of patients with cutaneous melanoma were collected from the diagnostic database of the University Hospital of Trieste from 1 January 1990 to 10 December 2013. Our study is based on a population which was constant over the period of observation; it was also well-defined and characterised by unrestrained sun exposure. Results: The number of cutaneous melanomas increased during the period of observation with a seasonality trend and gender related differences both for anatomical sites distribution and stage of the disease. Moreover, 6% of our cohort developed multiple melanomas. Conclusions: In a well-defined population devoted to excessive sun exposure the frequencies of skin melanomas roughly doubled from 1990 to 2013 following a seasonal trend. In that population, prevention efforts according to gender specific risk behaviour, as well as follow-up programmes both for evaluation of metastatic spreading and for early diagnosis of additional skin melanomas, are crucial due to gender specific differences and to the occurrence of multiple melanomas

    Fish survey in Angitola lake: in field non-invasive evaluation of weight

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    The Angitola FISH2O project, granted by Calabria FEP 2007-13 (Code 02/BA/12), aim to survey biodiversity in aquatic ecosystems, in which fishes should represent the main trophic resource within the various food chains relative to the Angitola lake. The final objective is to obtain a monitoring of various species by means of non-invasive techniques. According to Water Framework Directive (2000/60/EC), capturing and manipulations of animals were minimized, and the subjects captured were promptly released. Two areas, unequivocally identified by GPS coordinate, were selected at 4 and 10 meters of depths, in which fishing nets1 were positioned. Captured fishes were all manipulated as follows: 1) removed by nets by cutting wires and minimizing stress; 2) placed in basins filled with water; 3) weighted, with an electronic scale, and measured; 4) photographed; 5) clinically evaluated; 6) released as soon as possible. The dead subjects (n=28) were preserved in a portable fridge; they belonged to the following species: Carassius carassius (n=10), Perca fluviatilis (n=8), and Squalius cephalus (n=10). Data collected allowed developing a linear relation between length and weight. The resulting prediction equations and the correlation coefficients (r2) are summarized in table 1. Such equations are intended to have the precision reported only in the species and the sizes described. Even if a more accurate method, which might include all three dimensions of fishes, should be analyzed, accuracy of this method, proved by the high values of r2 is fully acceptable not only in common species but even more in vulnerable and endangered species

    Use of Mutaf Triangular Flap in a Case of Major Nasal Ala Substance Loss

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    The nasal ala, represents by nature, an anatomical part of the body unique for its characteristics. Unfortunately the nasal ala is often interested by traumas  and by cancers whose treatment can determine an all - thickness amputation. In such cases the reconstruction is extremely engaging from a technical point of view, since it is necessary to recreate a satisfying aesthetical structure and to make a free air flow. We present the clinical case of a nasal ala major substance loss, due to a cancer, that has been treated by employing the new Mutaf Triangular Flap.</p

    Breed and Feeding System Impact the Bioactive Anti-Inflammatory Properties of Bovine Milk

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    In the present study, we aimed at assessing the influence of breed and feeding system on the bovine milk profile of betaines and carnitines and milk capacity in counteracting the inflammatory endothelial cell (EC) damage induced by interleukin (IL)-6. In the first experimental design, two breeds were chosen (Holstein vs. Modicana) to investigate the biomolecule content and antioxidant capacity in milk and dairy products. In the second experimental design, two feeding systems (pasture vs. total mixed ratio) were tested only in Holstein to evaluate the possible effect on the functional profile of milk and dairy products. Finally, the bulk milk from the two experimental designs was used to evaluate the efficacy of preventing IL-6-induced endothelial inflammatory damage. Results showed that Modicana milk and whey had higher biomolecule content and antioxidant activity compared to Holstein milk (p < 0.01). Milk from Holstein fed TMR showed higher concentration of γ-butyrobetaine, δ-valerobetaine (p < 0.01), and l-carnitine (p < 0.05). Similarly, whey from Holstein fed TMR also showed higher content of δ-valerobetaine, glycine betaine, l-carnitine, and acetyl-l-carnitine (p < 0.01) compared to the Holstein fed pasture. Conversely, the antioxidant activity of milk and dairy products was not affected by the feeding system. In ECs, all milk samples reduced the IL-6-induced cytokine release, as well as the accumulation of reactive oxygen species (ROS) and the induction of cell death, with the most robust effect elicited by Modicana milk (p < 0.01). Overall, Modicana milk showed a higher content of biomolecules and antioxidant activity compared to Holstein, suggesting that the breed, more than the feeding system, can positively affect the health-promoting profile of dairy cattle milk

    Plasma fatty acid profile in Italian Holstein-Friesian dairy cows supplemented with natural polyphenols from the olive plant Olea Europaea L

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    This study evaluated the effects of supplementing with natural functional feed on the plasma fatty acid profile of lactating Italian Holstein-Friesian dairy cows. Thirty cows in mid-lactation received the natural olive extract PHENOFEED DRY (500 mg/cow/day) which mainly comprises hydroxytyrosol, tyrosol and verbascoside. The total content of polyphenols and the antioxidant power of standard feed, enriched feed and pure extract was evaluated respectively by Folin-Ciocalteu and DPPH assay, and a characterization in HPLC-UV (High-Perfor mance Liquid Chromatography-Ultraviolet) of bioactive molecules present in the extract PHENOFEED DRY was performed. PHENOFEED DRY was provided for 60 days, and the plasma profile of fatty acids was determined by Gas Chromatography. The administration of enriched feed resulted in an increase in the ratio of Omega-6 to Omega-3 polyunsaturated fatty acids from 3:1 to 4:1 (p<0.001). This was not influenced by the calving order. The addition of polyphenols helped to keep monounsaturated (MUFA) and saturated (SFA) levels constant and results in a significant increase in polyunsaturated (PUFA) fatty acid after 15 days of administration. The Omega 6/Omega-3 ratio was in the optimal range. The findings show that inclusion of natural functional food such as plant polyphenols helps to maintain a healthy blood fatty acid profile in lactating dairy cow

    A Narrative Approach to Describe QoL in Children With Chronic ITP

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    Objective: Primary immune thrombocytopenia (ITP) is a hemorrhagic disorder. Spontaneous recovery within 12 months occurs in the majority of pediatric patients. Nevertheless, in 20–30% of children the disease is chronic. The impact extends to the patients' families, whose everyday life, in terms of interpersonal relationships and financial status, is adversely affected. This study investigated the ability of a narrative instrument to improve the quality of life of pediatric chronic ITP patients and their families and quantified the familial burden imposed by the illness.Method: A quantitative survey and a narrative plot delivered through an online platform were adopted for the analysis.Results: Pediatricians of ten Italian Hematologic Centers explained the projects to patients and their family in the outpatient clinic. 70 caregivers of children with ITP filled the ad-hoc questionnaire. Data from 53 caregivers revealed the emotional impact of pediatric chronic ITP. The narrative approach highlighted the specific resources used by patients and their families to cope with the disease and its chronicity.Discussion: Caregivers underlined the need for “humaneness” in their interactions with clinical personnel. The majority of respondents provided positive feedback regarding the narrative project, defining the experience as “liberating” and improving their quality of life

    Metabolomic Approaches for Detection and Identification of Biomarkers and Altered Pathways in Bladder Cancer

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    Metabolomic analysis has proven to be a useful tool in biomarker discovery and the molecular classification of cancers. In order to find new biomarkers, and to better understand its pathological behavior, bladder cancer also has been studied using a metabolomics approach. In this article, we review the literature on metabolomic studies of bladder cancer, focusing on the different available samples (urine, blood, tissue samples) used to perform the studies and their relative findings. Moreover, the multi-omic approach in bladder cancer research has found novel insights into its metabolic behavior, providing excellent start-points for new diagnostic and therapeutic strategies. Metabolomics data analysis can lead to the discovery of a “signature pathway” associated with the progression of bladder cancer; this aspect could be potentially valuable in predictions of clinical outcomes and the introduction of new treatments. However, further studies are needed to give stronger evidence and to make these tools feasible for use in clinical practice
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