Search results for " sensor"
showing 10 items of 1714 documents
High sensing potentialities of tetra-tert-butyl-metallophthalocyaninesbased acoustic microsensors for xylenes measurement in air at room temperature
2022
International audience; Xylenes, classified as Volatil Organic Compounds, is a very harmful pollutant for human health that can be absorbed into the body via all exposures routes: inhalation, ingestion, or dermal. As defined by the US Environmental Protection Agency, the occupational exposure limi-tes are set to 100 ppm while the guidelines in non-occupational context are fixed to 50 ppm. For the concentration measurements in the at-mosphere, authorities commonly used sampling methods with post-exposure chemical titration or chromatography. A strong interest remains on the development of low cost, low power consumption and easy implemented microsensors able to deliver real-time indicative m…
Remote and proximal sensing for precision agriculture and viticulture". Special issue
2021
International audience; Special Issue InformationDear Colleagues,Remote and proximal sensing are the two most common techniques concerning the acquisition of information about an object or any phenomenon without physical contact with the object. Remote sensing is widely tied to the use of satellite, airborne or UAV platforms using multi- or hyperspectral imagery. In terms of proximal sensing, the sensor is close to the object and is installed on platforms ranging from handheld, fixed installations, or robotics and tractor-embedded sensors. The types of sensors range from simple RGB or grey-level-cameras to multispectral and hyperspectral high resoluted imaging systems or even thermographic …
Acetone Vapor-Sensing Properties of Chitosan-Polyethylene Glycol Using Surface Plasmon Resonance Technique
2020
To non-invasively monitor and screen for diabetes in patients, there is need to detect low concentration of acetone vapor in the range from 1.8 ppm to 5 ppm, which is the concentration range of acetone vapor in diabetic patients. This work presents an investigation for the utilization of chitosan-polyethylene glycol (PEG)-based surface plasmon resonance (SPR) sensor in the detection of trace concentration acetone vapor in the range of breath acetone in diabetic subjects. The structure, morphology, and elemental composition of the chitosan-PEG sensing layer were characterized using FTIR, UV-VIS, FESEM, EDX, AFM, and XPS methods. Response testing was conducted using low concentration of aceto…
Szkoła - w stronę wielozmysłowego i wielointeligentnego poznawania świata
2019
Artykuł dotyczy teorii inteligencji wielorakich a także kompetencji zawodowych współczesnego nauczyciela jest interdyscyplinarnym ujęciem zagadnienia z pogranicza - : psychologii, neurobiologii – a umiejscowionych kontekstach współczesnej pedagogiki. Teoria o istnieniu wielu niezależnych od siebie inteligencji Howarda Gardnera kwestionująca traktowanie inteligencji jako „jednolitej konstrukcji” jest bazą wyjściową do deliberacji nad osobniczymi predylekcjami sensorycznymi ucznia. Zdobyta wiedza takiej proweniencji pozwala nauczycielowi na bardziej kreatywną interakcje edukacją i wychowawczą z uczniem
Joint Optimization of Sensor Selection and Routing for Distributed Estimation in Wireless Sensor Networks
2014
Avances recientes en redes inalámbricos de sensores (WSNs, Wireless Sensor Networks) han posibilitado que pequeños sensores, baratos y con recursos limitados tanto en sensado, comunicación, como en computación, sean desplegados a gran escala. En consecuencia, las WSNs pueden ofrecer diversos servicios en importantes aplicaciones para la sociedad. Entre las varias restricciones que aparecen en el diseño de WSNs, tales como la limitación en energía disponible, procesamiento y memoria, la limitación en energía es muy importante ya que en muchas aplicaciones (ej., monitorización remota de diferentes entornos, edificios administrativos, monitoreo del hábitat, los incendios forestales, la atenció…
Off-line methods for determining air quality in museums
2010
This paper will examine three methodologies deployed in off-line research relating to air quality in museums. These methodologies made use of sensors based on the different chemical-physicalproperties of various materials (corrosiveness, hardness and absorption). Various field applications were applied to case studies, which were performed in two museums in Palermo, Italy: the Regional Gallery of Palazzo Abatellis and the Diocesan Museum. This review of methodologies and sensors examines which protocol should be put into practice in museums in monitoring the air quality of display spaces and the conservation of cultural artefacts.
A Self-powered Ambient Light Power Measurement Platform with Time-domain Readout
2021
Internet of Things (IoT) provides more and more adequate infrastructures for many applications and advanced services. This scenario promotes the ability to satisfy the growing demand for innovative measuring systems, increasingly popular consisting of intelligent nodes, totally wireless, easy to install, and that requires the least possible maintenance. In this context, this paper aims to contribute to state of the art with an energy-autonomous and battery-free measurement platform designed to measure the ambient light power when its level exceeds the sensitivity threshold. The measurement platform utilizes a single transducer to scavenge energy and concurrently measure the ambient light in…
Redonner l’envie de manger aux personnes âgées en institution : impact de quatre facteurs environnementaux sur la prise alimentaire et le plaisir lié…
2012
Comme l’ont montré plusieurs travaux, l’entrée en Etablissement d’Hébergement pour Personnes Agées Dépendantes (EHPAD) s’accompagne d’une augmentation du risque de dénutrition (HAS, 2007 ; Sulmont-Rossé et al., 2012). Parmi les facteurs susceptibles d’affecter la prise alimentaire, il a été montré que l’environnement qui entoure le repas (de l’assiette à l’ambiance générale) contribuait fortement à l’appétit et à la prise alimentaire des résidents d’EHPAD (Nieuwenhuizen et al. 2009 ; Nijs et al. 2009). De fait, quatre études ont montré qu’une amélioration globale de l’environnement (changement de mobilier, décoration de la salle à manger, réorganisation du personnel…) pouvait entrainer une …
MEHANOLUMINISCENTO MATERIĀLU PIELIETOJAMĪBA OPTOELEKTRISKO SENSORU IZVEIDEI UN METODES IZSTRĀDE TO ĪPAŠĪBU IZPĒTEI
2021
Mehanoluminiscence (ML) ir spontāna gaismas emisija mehāniskas mijiedarbības rezultātā. Kaut gan efekts tika atklāts simtiem gadu atpakaļ, tas neatrada plašu, praktisku pielietojumu. Tomēr pētījumi norāda uz to, ka ML varētu tikt pielietota mehāniskā sprieguma sensoru izveidei. Viens no limitējošajiem faktoriem ML plašai pielietošanai ir šaurais izpētīto materiālu klāsts, kuriem piemīt intensīva un pašatjaunojama luminiscence. Pēdējos gados strauji pieaug ar lantanīdiem leģētu materiālu pētījumu skaits, kuri gan paaugstina materiālu luminiscences intensitāti, gan paplašina ar ML iegūstamo emisijas viļņa garumu diapazonu. Darba mērķis ir izveidot mērījumu sistēmu un veikt mehanoluminiscenta …
Vairākslāņu grafēna un nitrocelulozes kompozīta elektroda iegūšana un izpēte slāpekļa savienojumu noteikšanā
2018
Slāpekļa savienojumi, jo īpaši NOx, tiek uzskatīti par vieniem no cilvēka veselībai bīstamākajiem savienojumiem gaisa piesārņojumā. Palielinoties fosilā kurināmā dedzināšanas apjomam gan iekšdedzes dzinējos, gan kurtuvēs, paaugstinās arī tā degšanas blakusproduktu daudzums it īpaši pilsētās ar lieliem transporta sastrēgumiem, kas negatīvi ietekmē pilsētnieku veselību, nerunājot par dzīvniekiem un augiem. Lai spētu precīzāk ierobežot kaitīgo savienojumu daudzuma izvadīšanu atmosfērā, rodas nepieciešamība pēc jutīgiem šo savienojumu gāzu sensoriem. Potenciāls materiāls gāzu noteikšanā ir grafēns kā divdimensionāls materiāls, piemērotākais gāzu sensoru pielietojumos lielā virsmas laukuma dēļ. …