Search results for "Mechanical devices"

showing 5 items of 5 documents

Can life be standardized? Current challenges in biological standardization

2021

The concept of standard strongly evokes machines, industries, electric or mechanical devices, vehicles, or furniture. Indeed, our technological civilization would not be possible – at least in the terms it is structured today – without universal, reliable components, whose acknowledged use results in competitive costs, robustness and interchangeability. For example, an Ikea screw can be used in a wide set of structurally dissimilar furniture and an app can be run on many different smartphones. The very concept of standardization is linked to the industrial revolution and mass production of goods through assembly lines. The question we will try to answer in the present paper is the extent to…

0301 basic medicineMultidisciplinaryStandardizationComputer scienceContext-dependencyModularityInterchangeabilityPromiscuity03 medical and health sciences030104 developmental biology0302 clinical medicineHistory and Philosophy of ScienceRisk analysis (engineering)Robustness (computer science)RealmNoise030217 neurology & neurosurgeryMechanical devicesSynthetic biologyMètode Revistade difusió de lainvestigació
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Electrical Aging Tests on Enameled Wire Exposed to Gamma Irradiation

2011

Electrical agingIndustrial plantsMaterials sciencebusiness.industryStatorsGamma raysTestingGAMMA IRRADIATION ELECTRICAL AGINGElectrical engineeringElectrical treeingWindingThermosetsElectric brazingInsulating materialsPartial dischargesElectromechanical devicesIrradiationElectric brazing; Electromechanical devices; Gamma rays; Industrial plants; Insulating materials; Irradiation; Partial discharges; Stators; Testing; Thermosets; WindingComposite materialbusinessSettore ING-IND/19 - Impianti NucleariGamma irradiation
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An AC-assisted single-nanowire electromechanical switch

2013

A unique two-source controlled nanoelectromechanical switch has been assembled from individual, single-clamped Ge nanowires. The switching behaviour was achieved by superimposing the control signals of specific frequencies to the electrostatic potential of the output terminals, eliminating the need for an additional gate electrode. Using an in situ manipulation technique inside a scanning electron microscope, we demonstrate that the pull-out force required to overcome adhesion at the contact can be significantly reduced by exciting mechanical resonant modes within the nanowire.

In situMaterials scienceNanowiresGermaniumElectrostatic potentialsScanning electron microscopeNanowirechemistry.chemical_elementNanotechnologyGermaniumGeneral ChemistryAdhesionControl signalSpecific frequenciesManipulation techniqueschemistryElectromechanical devicesPull-out forceNanoelectromechanical switchesGate electrodesElectrodeMaterials ChemistryControl signalScanning electron microscopyElectromechanical switchesJournal of Materials Chemistry C
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Characterization of MEMS accelerometer self-noise by means of PSD and Allan Variance analysis

2017

In this paper, we have studied the sources of error of a low-cost 3-axis MEMS accelerometer by means of Power Spectral Density and Allan Variance techniques. These techniques were applied to the signals acquired from ten identical devices to characterize the variability of the sensor produced by the same manufacturer. Our analysis showed as identically produced accelerometer have somehow variable behavior in particular at low frequency. It is therefore of paramount importance before their use in Inertial Navigation or Earthquakes Monitoring System, a complete characterization of each single sensors.

Microelectromechanical systemsEngineering010504 meteorology & atmospheric sciencesbusiness.industrySpectral densityLow frequency010502 geochemistry & geophysicsAccelerometer01 natural sciencesCharacterization (materials science)AccelerationSettore ING-INF/04 - AutomaticaElectronic engineeringAllan varianceAccelerometers Micromechanical devices Standards Earthquakes Acceleration Monitoring Inertial navigationbusinessInertial navigation system0105 earth and related environmental sciences2017 7th IEEE International Workshop on Advances in Sensors and Interfaces (IWASI)
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Infectious complications associated with short-term mechanical circulatory support in urgent heart transplant candidates

2021

[Abstract] Introduction and objectives. Short-term mechanical circulatory support is frequently used as a bridge to heart transplant in Spain. The epidemiology and prognostic impact of infectious complications in these patients are unknown. Methods. Systematic description of the epidemiology of infectious complications and analysis of their prognostic impact in a multicenter, retrospective registry of patients treated with short-term mechanical devices as a bridge to urgent heart transplant from 2010 to 2015 in 16 Spanish hospitals. Results. We studied 249 patients, of which 87 (34.9%) had a total of 102 infections. The most frequent site was the respiratory tract (n = 47; 46.1%). Microbiol…

medicine.medical_specialtyTrasplante cardiacomedicine.medical_treatmentEnfermedad cardiovascular030204 cardiovascular system & hematologyAsistencia circulatoria mecánica Asistencia ventricular Critical care Cuidados críticos ECMO Heart transplant Infección Infection Mechanical circulatory support Trasplante cardiaco Ventricular assist deviceWaiting period03 medical and health sciences0302 clinical medicineMechanical circulatory supportAsistencia circulatoria mecánicaInternal medicineEpidemiologymedicineHumansInfecciónTrasplante de corazónCuidados críticosRetrospective StudiesHeart Failurebusiness.industryGeneral MedicineAparato respiratorioTrasplante de órganosCritical caremedicine.anatomical_structureTreatment OutcomeSpainVentricular assist deviceCirculatory systemAsistencia ventricularVentricular assist deviceHeart TransplantationHeart transplantHeart-Assist DevicesECMObusinessInfectionMechanical devicesRespiratory tract
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