208 research outputs found
Human Taenia martis Neurocysticercosis, Switzerland
No full textNeurocysticercosis is almost exclusively caused by Taenia solium tapeworms. We describe a case of neurocysticercosis in Switzerland caused by infection with Taenia martis, the marten tapeworm, and review all 5 published cases of human infection with the marten tapeworm. In epidemiologically nonplausible cases of neurocysticercosis, zoonotic spillover infections should be suspected
Imaging the electron charge density in monolayer MoS2 at the Ångstrom scale
No full text<p>update: V2 now includes MoS2_valence_DFT.tif, MoS2_core_DFT.tif, CORE_2X2_Mo_6 DFT charge density files which were used as input to the STEM simulation code. Please see V1 to download all other files and code.</p>
<p>This repository includes the data and Python code used to produce the figures in the manuscript. The code was authored by Joel Martis, please contact him ([email protected]) for any questions about terminology and usage.</p>
<p>Please see the arXiv preprint for the manuscript and full author list. The Zenodo list only includes the first co-author for brevity.</p>
<p>https://arxiv.org/abs/2210.09478</p>
<p>https://doi.org/10.1038/s41467-023-39304-9</p>https://arxiv.org/abs/2210.0947
Conometric Connection for Implant-Supported Crowns: A Prospective Clinical Cohort Study
No full textBackground: Traditional screw or cemented connections in dental implants present limitations, prompting the exploration of alternative methods. This study assesses the clinical outcomes of single crowns and fixed partial prostheses supported by conometric connections after one year of follow-up. Methods: Twenty-two patients received 70 implants, supporting 33 rehabilitations. Biological responses and prosthodontic complications were evaluated at baseline, 6 months, and 12 months. Results: All implants exhibited successful osseointegration, with no losses or peri-implant inflammation. Marginal bone levels showed minimal changes, well below pathological thresholds. The difference in marginal bone loss (MBL) was -0.27 +/- 0.79 mm between T0 and T1, and -0.51 +/- 0.93 mm between T0 and T2. No abutment screw loosening or crown chipping occurred. However, coupling stability loss was observed in nine cases. Conclusions: The conometric connection demonstrated successful integration and minimal complications after one year. This alternative shows promise, particularly in simplifying handling and improving marginal adaptation. Further research with larger sample sizes and longer follow-up is warranted for comprehensive validation
The Conometric Connection for the Implant-Supported Fixed Prosthesis: A Narrative Review
No full textAim: The conometric concept was proposed as a possible connection between the abutment and the prosthetic coping. This research aimed to review the features and possible clinical uses of this connection in an implant-supported fixed prosthesis. Methods: An electronic search was conducted on an online database for the topic in object; articles published in international literature were considered and the research gave 17 results, and 6 parameters were analyzed. Results: This connection eliminated the possibility of cement residues in the subgingival region, reducing the risk of inflammation of peri-implant soft and hard tissues; not having to remove the cement residues, it is possible to place the margins in more apical portions, improving the aesthetics outcomes of the rehabilitations. It is also known that the retention by means of a screw causes a weakening of the restoration. The retentive force is adequate for fixed rehabilitation even after a high number of insertion–disengagement cycles; in vitro studies have also shown a high bacterial sealing. Implant rehabilitation using preformed components, such as conometric hoods, is helpful for CAD/CAM, so a digital workflow is possible. Several types of prosthesis were presented, all of which demonstrated adequate clinical performance in the follow-up observation. Conclusions: This type of connection seems to be suitable to support fixed implant rehabilitations, but long-term clinical studies are needed to validate this system
Synchronous reluctance machine geometry optimisation through a genetic algorithm based technique
No full textComprehensive Diagnosis of Localized Rolling Bearing Faults during Rotating Machine Start-Up via Vibration Envelope Analysis
No full text[EN] The analysis of electrical machine faults during start-up, and variable speed and load conditions offers numerous advantages for fault detection and diagnosis. In this context, diagnosing localized bearing faults through vibration signals remains challenging, particularly in developing physically meaningful, simple, and resampling-free techniques to monitor fault characteristic components throughout machine start-up. This study introduces a straightforward method for qualitatively identifying the time-frequency evolutions of localized bearing faults during the start-up of an inverter-fed machine. The proposed technique utilizes the time-frequency representation of the envelope spectrum, effectively highlighting characteristic fault frequencies during transient operation. The method is tested in an open-source dataset including transient vibration signals. In addition, the work studies the method limitations induced by the mechanical transfer path, when the bearing surroundings are not directly accessible for vibration acquisition. The proposed methodology efficiently identifies incipient localized bearing faults during inverter-fed machine start-up when the fault signature is not highly attenuated.This research was funded by the European Commission (HORIZON Program) within the context of the DITARTIS Project ( Network of Excellence in Digital Technologies and AI Solutions for Electromechanical and Power Systems Applications ) under the Call HORIZON-WIDERA-2021-ACCESS-03 (Grant Number 101079242).Ruiz-Sarrió, JE.; Antonino-Daviu, JA.; Martis, C. (2024). Comprehensive Diagnosis of Localized Rolling Bearing Faults during Rotating Machine Start-Up via Vibration Envelope Analysis. Electronics. 13(2). https://doi.org/10.3390/electronics13020375S13
Chapitre 6. Fanum Martis, chef‑lieu de la cité des Coriosolites
No full textLes recherches archéologiques conduites sur la ville antique de Corseul n’ont pas été poursuivies après la fin de la fouille de Monterfil II. Cet arrêt a été l’occasion de faire le point sur les connaissances acquises sur Fanum Martis. La confrontation des données issues de cette fouille avec celles des autres sites permet de proposer de nouvelles perspectives, plus particulièrement sur le plan urbanistique. L’évolution générale de l’espace urbain est ainsi revue à la lueur de nouveaux éléments ; une chronologie globale de l’agglomération est aussi esquissée. Pour chaque période, sont donc présentés les changements qui ont affecté les différents secteurs de la ville. Quelques hypothèses sur l’aspect de la cité au Bas‑Empire sont aussi exposées ; elles ont abouti, en particulier, à une proposition de restitution de l’évolution de la trame viaire après l’abandon des quartiers, survenue, pour certains, dès la fin du iiie s.À pause in archaeological research on the Gallo‑Roman town of Corseul following the Monterfil II excavations has given researchers the opportunity to consolidate knowledge on Fanum Martis Comparing information obtained from this excavation with that from other sites has enabled the author to suggest new perspectives, particularly with reference to urbanisation, to reexamine changes in the town’s layout on the basis of fresh data and to sketch out an overall chronology of the urban complex. For each period changes which have affected different sectors of the town are presented. Several hypothèses concerning the physical appearance of the late Roman town are set forth, including a proposed reconstruction of changes in the Street plan after the area was abandoned, an event which some scholars place as early as the end of the third century
Localized Bearing Fault Analysis for Different Induction Machine Start-Up Modes via Vibration Time Frequency Envelope Spectrum
No full text[EN] Bearings are the most vulnerable component in low-voltage induction motors from a maintenance standpoint. Vibration monitoring is the benchmark technique for identifying mechanical faults in rotating machinery, including the diagnosis of bearing defects. The study of different bearing fault phenomena under induction motor transient conditions offers interesting capabilities to enhance classic fault detection techniques. This study analyzes the low-frequency localized bearing fault signatures in both the inner and outer races during the start-up and steady-state operation of inverter-fed and line-started induction motors. For this aim, the classic vibration envelope spectrum technique is explored in the time¿frequency domain by using a simple, resampling-free, Short Time Fourier Transform (STFT) and a band-pass filtering stage. The vibration data are acquired in the motor housing in the radial direction for different load points. In addition, two different localized defect sizes are considered to explore the influence of the defect width. The analysis of extracted low-frequency characteristic frequencies conducted in this study demonstrates the feasibility of detecting early-stage localized bearing defects in induction motors across various operating conditions and actuation modes.This research was funded in part by the European Commission (HORIZON program)
within the context of the DITARTIS Project ( Network of Excellence in Digital Technologies and
AI Solutions for Electromechanical and Power Systems Applications ) under the call HORIZONWIDERA-2021-ACCESS-03 (Grant Number 101079242), and in part by the Spanish Ministerio de
Ciencia e Innovación , Agencia Estatal de Investigación and FEDER program in the framework of
the Proyectos de Generación de Conocimiento 2021 of the Programa Estatal para Impulsar la
Investigación Científico-Técnica y su Transferencia , belonging to the Plan Estatal de Investigación
Científica, Técnica y de Innovación 2021 2023 (ref: PID2021-122343OB-I00).Ruiz-Sarrió, JE.; Antonino-Daviu, J.; Martis, C. (2024). Localized Bearing Fault Analysis for Different Induction Machine Start-Up Modes via Vibration Time Frequency Envelope Spectrum. Sensors. 24(21). https://doi.org/10.3390/s24216935S242
Un grecista e la datazione di Reposiano
No full textThe author defends some textual choices in his edition of the Concubitus Martis et Veneris: he also defends the traditional date of the poem against some remarks by A. Traina
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