51 research outputs found
On the species of the genus Selliporella SARTONI & CRESCENTI, 1962 from the Middle Jurassic of the coastal Dinarides of Croatia
No full textEmended diagnosis of the genus Selliporella and its type-species, S. donzellii SARTONI & CRESCENTI is proposed, based on the definitely proven existence of non-ramified branches in the older (basal) part of thallus and their ramifying in its higher (younger) parts. Based on the differences in the morphological characteristics of branches in the upper thallus parts, the type-species has been split into two varieties: S. donzellii var. donzellii SARTONI & CRESCENTI and S. donzellii var. galaeformis n. comb. Selliporella cornutuformis n. sp. is proposed, characterized by distinctly articulated (segmented) and spiky thallus, with each primary branch bearing a bundle of several trichophorous secondaries. Generic attribution of species originally described as Diplopora johnsoni PRATURLON and Triploporella neocomiensis RADOIČIĆ has been reviewed, resulting in their being unified as the same species, which, according to its newly observed morphological characters, has been ascribed to the genus Pseudoclypeina. Because Diplopora johnsoni has been validly described, Triploporella neocomiensis becomes, taxonomically, the younger synonym of Pseudoclypeina johnsoni (PRATURLON) n. comb
"Problemi Inerenti l'Impiego della Risonanza Magnetica nei Pazienti Portatori di Metalli Correntemente Usati nelle Pratiche Ortopediche" “Inherent problems of the use of magnetic resonance in patients with metallic implants currently used in orthopedic practice”
No full textForty-eight patients with oncologic prosthetic devices (modular rotatory shoulder, Kotz, custom made) and metallic means of fixation (Sherman's plates, Ender's rods, etc.) underwent MRI in order to: 1) assess possible physical changes in the magnetic field or the alloys under examination; 2) detect the presence and type of artifacts, and 3) verify the onset of eventual noxious effects of the alloy on the patient. The diagnostic investigation was preceded by an experimental phase which was characterized by: A) a study of the temperature fluctuations of the alloys when submitted to the magnetic field and to radiofrequency; B) the identification and characterization of the artifacts, as well as C) their physical interpretation. During examination, there was no evidence of any mobilization of the means of fixation, sensation of endogenous heat, or other subjective complaints on the part of the patient. The authors observed that, even in the presence of artifacts, MRI provided good evaluation of the soft tissues around the devices by identifying tumor recurrences in the presence of an oncological prosthesis. MRI was also capable of showing trophic changes in the tissues surrounding the means of fixation. Thus, the method exhibits no contraindications in the study of these patients but, on the other hand, does not allow the evaluation of the integrity or mobilization of the prosthetic devices
Application of digital system in food safety chain management in Uzbekistan: a preliminary evaluation
No full textIt is estimated that augmented food demand and international trade will result in the increase
of food borne diseases with a rebound of important challenges for the global food safety, especially
in Regions where the agrifood system is expected to significantly grow. In Central Asia
agricultural and food production expanded rapidly over the last decades and in Uzbekistan the
expected enrichment of population will result in a higher food quality food demand. Innovation
could face the biggest challenges of the food sector and digital technologies could help in finding
solution to overcome problems related to food safety. In this work the application of innovative
food safety management system in Uzbekistan is analysed. Results show how innovation and
digital technologies could be helpful in addressing and solving problems related to food safety and
sustainability as well as competitiveness in international market
L’imaging nell’infarto segmentale del testicolo: nostra esperienza e revisione della letteratura
No full textPurpose: The purpose of this study was to evaluate the usefulness of the main methods of diagnostic imaging in patients with segmental testicular infarction (STI) for obtaining accurate clinical and therapeutic approaches. Materials and methods: Between January 2004 and January 2011, 798 patients were examined with colour Doppler ultrasound (CDUS) for disease of the scrotum. Fourteen patients with CDUS findings suspicious for STI were subjected to magnetic resonance imaging (MRI). In five patients, contrast-enhanced ultrasonography (CEUS) was performed. Results: CDUS showed hypoechoic avascular areas suspicious for STI in 14 patients (1.75%). MRI confirmed the presence of predominantly hypointense lesions in T1- and T2-weighted sequences, with perilesional vasculature and no intrinsic contrast enhancement in 13 patients. In follow-up examinations, these abnormalities gradually decreased. This finding was confirmed in the five patients examined with CEUS. Only in one case did MRI reveal discrete intralesional contrast enhancement after injection of contrast medium, and the lesions appeared stable during the CDUS and MRI follow-up; this patient underwent orchiectomy, with a diagnosis of B-cell lymphoma. Conclusions: In our experience CDUS, CEUS and MRI proved indispensable for accurate clinical and therapeutic approaches in suspected STI. © 2012 Springer-Verlag Italia
A Systematic Method to Generate Effective STLs for the In-Field Test of CAN Bus Controllers
No full textIn order to match the strict reliability requirements mandated by regulations and standards adopted in the automotive sector, as well as other domains where safety is a major concern, the in-field testing of the most critical devices, including microcontrollers and systems on chip, is a crucial task. Since the controller area network (CAN) bus is widely used in the automotive domain, the corresponding controller ubiquitously appears in all these devices. This paper presents a generic and systematic methodology to develop an effective in-field test procedure for CAN controllers based on a functional approach (i.e., on the adoption of self-test libraries). The method can be customized to match the requirements coming from different scenarios, and allows the test engineer to maximize the achieved fault coverage in terms of structural faults in the different cases. The experimental results we gathered on a representative CAN controller model show that, given two typical testing scenarios, we are able to detect (Formula presented.) and (Formula presented.) of stuck-at faults, respectively, hence demonstrating the effectiveness of the proposed approach.Computer EngineeringQuantum & Computer Engineerin
A benthic mucilage event in North-Western Mediterranean Sea and its possible relationships with the summer 2003 European heatwave: short term effects on littoral rocky assemblages.
No full text
Renal Measures in Healthy Italian Trotter Foals and Correlation Between Renal and Biometric Measures: Preliminary Study
No full textThe aim of this study was to evaluate ultrasonographic renal measures in healthy foals aged 1–6 weeks and to verify the correlation between biometric measures to ultrasonographic renal ones. A total of nine Italian trotter foals born in the same stud farm and underwent similar management conditions were enrolled. Inclusion criteria were normal gestation time, unassisted delivery, and normal physical examination at all evaluation times. Length and height of both kidneys were measured by ultrasound weekly from 1 to 6 weeks of life, along with the thoracic and the middle third of the metacarpal area circumferences. Data were expressed as mean and standard deviation, and distribution was evaluated. One-way analysis of variance (ANOVA) was applied to verify differences related to time. The Pearson correlation test was carried out to evaluate the linearity between time versus all the parameters measured. Student's t test was used to verify differences in ultrasound measures between right and left kidney at all recorded times. The Pearson test was applied to a mean-variance matrix to verify the correlation between each biometrical versus all renal measures. Significance level was set at P <.05. One-way ANOVA showed differences in biometric and renal measures related to time. Correlation test revealed a linear growth. Differences in ultrasound renal measures between right and left kidney were obtained. Correlation was found between biometrical parameters versus kidney measures. Renal measures and differences between left and right kidneys were in line with literature. Correlation test revealed a linear growth. Renal growth is correlated with age and biometric measure
Determined-Safe Faults Identification: A step towards ISO26262 hardware compliant designs
No full textThe development of Integrated Circuits for the Automotive sector imposes on major challenges. ISO26262 compliance, as part of this process, entails complex analysis for the evaluation of potential random hardware faults. This paper proposes a systematic approach to identify faults that do not disrupt safety-critical functionalities and consequently can be considered Safe. By deploying code coverage and Formal verification techniques, our methodology enables the classification of faults that are unclassified by other technologies, improving ISO26262 compliance. Our results, in combination with Fault Simulation, achieved a Diagnostic Coverage of 93% in a CAN Controller. These figures allow an initial assessment for an ASIL B configuration of the IP
The Neogene - Quaternary boundary definition: a review and proposal
No full textThe problem of the Neogene/Quaternary (N/Q) boundary is examined in the light of the stratigraphic approach favoured by the International Stratigraphic Guide (HEDBERG, 1976) and in the ligth of the most recent advances in uppermost Pliocene-lower Pleistocene biostratigraphy. Based upon a critical review of the historical concepts of the Pliocene and Pleistecene epochs and upon the most recent data on the various N/Q boundary stratotypes proposed (Le Castella, Santa Maria di Catanzaro and Vrica) we consider that the Vrica Section is undoubtedly the most suitable for correctly defining the N/Q boundary. Regarding the precise definition of this boundary, it is proposed to the International Committees in charge of the problem that the N/Q boundary be defined in the Vrica Section by the lithological level of the first appearance of Cytheropteron testudo, because it represents a chronohorizon widely recognizable in the global geologic record and because it is the most historically appropriat
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