Search results for "Instrument"

showing 10 items of 5652 documents

Intercomparison of instruments for measuring leaf area index over rice

2015

Leaf area index (LAI) is a key biophysical parameter used to determine foliage cover and crop growth in environmental studies in order to assess crop yield. LAI estimates can be classified as direct or indirect methods. Direct methods are destructive, time consuming, and difficult to apply over large fields. Indirect methods are non-destructive and cost-effective due to its portability, accuracy and repeatability. In this study, we compare indirect LAI estimates acquired from two classical instruments such as LAI-2000 and digital cameras for hemispherical photography, with LAI estimates acquired with a smart app (PocketLAI) installed on a mobile smartphone. In this work it is shown that LAI…

VegetationHemispherical photographyriceCrop growthAgricultureIndexesRemote sensingCamerassmartphoneFoliage coverMeteorologyPhotographyLeaf Area Index (LAI)Environmental scienceLeaf area indexInstrumentsRemote sensing2015 IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
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DEPFET Active Pixel Detectors for a Future Linear e(+)e(-) Collider

2013

arXiv:1212.2160v1.-- et al.

Vertex (graph theory)Nuclear and High Energy PhysicsParticle physicsPhysics - Instrumentation and DetectorsPhysics::Instrumentation and Detectorsvertex detectorComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISIONFOS: Physical sciences01 natural sciencesHigh Energy Physics - Experimentlaw.inventionHigh Energy Physics - Experiment (hep-ex)Signal-to-noise ratiolaw0103 physical sciencesElectrical and Electronic EngineeringDetectors and Experimental Techniques010306 general physicsColliderPrecision Pixel Detectors [9.3]ComputingMethodologies_COMPUTERGRAPHICSAdvanced infrastructures for detector R&D [9]PhysicsPixel010308 nuclear & particles physicsDetectorFísicaInstrumentation and Detectors (physics.ins-det)Active pixel sensorNuclear Energy and EngineeringHigh Energy Physics::ExperimentVertex detectorlinear colliderddc:620DEPFETPixel detector
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The Voyage of Metals in the Universe from Cosmological to Planetary Scales: the need for a Very High-Resolution, High Throughput Soft X-ray Spectrome…

2019

Metals form an essential part of the Universe at all scales. Without metals we would not exist, and the Cosmos would look completely different. Metals are primarily born through nuclear processes in stars. They leave their cradles through winds or explosions, and then start their journey through space. This can lead them in and out of astronomical objects on all scales, ranging from comets, planets, stars, entire galaxies, groups and clusters of galaxies to the largest structures of the Universe. Their wanderings are fundamental in determining how these objects, and the entire universe, evolve. In addition, their bare presence can be used to trace what these structures look like. The scope …

Very high resolutionAstronomical ObjectsCosmology and Nongalactic Astrophysics (astro-ph.CO)010504 meteorology & atmospheric sciencesGalaxy-ISM-CGM-IGM feedbackFOS: Physical sciencesSpace (mathematics)Cycle of baryons and metals7. Clean energy01 natural sciencesCycle of baryons and metals; Galaxy-ISM-CGM-IGM feedback; High-resolution X-ray spectrometer; X-ray gratingsSettore FIS/05 - Astronomia E Astrofisica0103 physical sciences[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]X-ray gratingsInstrumentation and Methods for Astrophysics (astro-ph.IM)010303 astronomy & astrophysicsThroughput (business)0105 earth and related environmental sciencesCycle of baryons and metalHigh Energy Astrophysical Phenomena (astro-ph.HE)PhysicsSoft x rayCOSMIC cancer databaseSpectrometerSettore FIS/05AstronomyAstronomy and AstrophysicsHigh-resolution X-ray spectrometerAstrophysics - Astrophysics of GalaxiesStars13. Climate actionSpace and Planetary ScienceAstrophysics of Galaxies (astro-ph.GA)Astrophysics - Instrumentation and Methods for AstrophysicsAstrophysics - High Energy Astrophysical Phenomena[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]Astrophysics - Cosmology and Nongalactic Astrophysics
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Atkritumu apsaimniekošanas nozares pārvaldība Latvijā

2021

Maģistra darba “Atkritumu apsaimniekošanas nozares pārvaldības novērtējums Latvijā” mērķis ir veikt atkritumu nozares pārvaldības sistemātiski strukturētu izvērtējumu, lai noteiktu kā tā izveidota izrietot no Eiropas Parlamenta un Padomes direktīvas 2008/ 98/EK (Eiropas Savienības oficiālais vēstnesis 2008) par atkritumiem un tiesisko rāmi, kura ietvaros katrai dalībvalstij ir iespēja lemt, lai pielāgotu sistēmu savas valsts vajadzībām, lai nodrošinātu šajā direktīvā noteiktos mērķus un prioritātes. Izstrādājot maģistra darbu, atkritumu nozare tika vērtēta kā sociāli ekoloģiska sistēma. Darbā tika izvērtētas ES prasības atkritumu pārvaldībā institucionālā modeļa kontekstā un visu pārvaldība…

Vides zinātneatkritumu pārvaldības instrumentu kopaatkritumu apsaimniekošanas pārvaldības politikaatkritumu saimniecības nozares pārvaldībapārvaldības segmetni atkritumu nozarē
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Akustisko vidi veidojošas skaņas frekvencionāla analīze mūzikas instrumentu spēlēšanas laikā

2021

Bakalaura darbā tiek aplūkota muzikālās skaņas iespējamā ietekme uz cilvēku atkarībā no frekvenču un skaņas spiediena līmeņa atšķirībām, un, izmantojot frekvencionālo analīzi, no vides zinātnes skatu punkta tiek pētīta robeža starp troksni un mūziku. Darba teorētiskajā daļā tiek apskatīti ar akustisko vidi saistītie jēdzieni, kā arī tiek izpētīta skaņas nozīme un skaņas ietekme uz cilvēku. Darba praktiskajā daļā tiek aprēķināts dažādu mūzikas instrumentu (taustiņinstrumentu, stīgas instrumentu, pūšaminstrumentu un sitaminstrumentu) radītais skaņas spiediena līmenis, atkarībā no kura tiek noteiktas mūzikas instrumentu dominējošās frekvences un to atšķirības starp mūzikas instrumentu grupām. …

Vides zinātnemūzikas instrumentitroksnisskaņas spiediena līmenisfrekvenceskaņa
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Piekrastes integrētās pārvaldības attīstība: Liepājas piemērs

2017

Mаģistrа dаrbа nosаukums ir ,,Piekrаstes integrētās pārvаldībаs аttīstībа Lаtvijā: Liepājas piemērs”. Mаģistrа dаrbа mērķis ir izzināt integrētās pārvаldībаs аttīstību Kurzemes lielākаjās pаšvаldībās un konkrēti Liepājas pilsētā, un izstrādāt priekšnosacījumu kopumu integrētās piekrastes pārvaldības attīstībai Latvijas piekrastes pašvaldībās. Maģistra darbā ir veikta literatūras analīze par piekrаstes ilgtspējīgаs pārvаldībаs un аttīstībаs konceptu t.sk. pārvaldības ietvаru, lаbās prаkses piemēriem integrētаjā piekrаstes pārvаldībā Eiropā, pasaulē un Lаtvijаs pаšvаldībās. Maģistra darbā lietota pētījuma metodoloģija, kura sevī ietver gadījuma izpētes analīzi (no angļu val. – case study rese…

Vides zinātnepiekrаstes pārvаldībаintegrētа piekrastes pārvаldībavides pārvaldībapārvaldības instrumenti
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One-sensor electronic olfactometer for rapid sorting of fresh fruit juices

2001

Abstract A low-cost electronic olfactometer was developed, based on virtual sensors array (an array of signals from a single metal oxide sensor) and on our proprietary semi-automated sampling system. This concept enables us to drastically improve the sensitivity and selectivity of the entire olfactometer to make it suited to food products analysis. Each step of the prototype was checked separately in earlier work, and finally the system performance was evaluated first on pure chemicals, and then at-line for grape juice during grape-harvesting in Champagne. It is shown that over a 3-week vintage period, the drift of the unique-sensor was quite low (absolute baseline value: avg., 2152; std., …

Vintage[SPI.OTHER]Engineering Sciences [physics]/OtherAnalytical chemistry02 engineering and technology01 natural sciencesMaterials ChemistryTransient responseSensitivity (control systems)Electrical and Electronic EngineeringInstrumentationAromaComputingMilieux_MISCELLANEOUSMathematicsbiology[SPI.OTHER] Engineering Sciences [physics]/Other010401 analytical chemistryMetals and AlloysSorting021001 nanoscience & nanotechnologyCondensed Matter Physicsbiology.organism_classification0104 chemical sciencesSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsOlfactometerFood products0210 nano-technologyBiological systemTest solution
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Influencia de la secuenciación de contenidos y el apoyo parental en la motivación de estudiantes de violín en edad preescolar

2020

La secuenciación de contenidos y el papel de la familia pueden ser cuestiones fundamentales en iniciación instrumental, influyendo de manera decisiva en la motivación de los alumnos. Esta investigación analizó esta influencia en la iniciación al violín con 11 estudiantes en edad preescolar en clase individual. Para ello, se llevó a cabo una investigación-acción realizada por el profesor como observador participante, utilizando dos aproximaciones didácticas de iniciación al violín. Los resultados muestran que aquellos alumnos cuyos padres o tutores estuvieron más involucrados en el proceso de enseñanza-aprendizaje tuvieron mayores índices de motivación. Además, aquellos que se sintieron sobr…

ViolinPedagogyInstrumental learningPersonality psychologyPsychologyEducationRevista Electrónica de Investigación Educativa
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Global Trigger Technological Demonstrator for ATLAS Phase-II upgrade

2020

ATLAS detector at the LHC will undergo a major Phase-II upgrade for the High Luminosity LHC. The upgrade affects all major ATLAS systems, including the Trigger and Data Acquisition systems. As part of the Level-0 Trigger System, the Global Trigger uses full-granularity calorimeter cells to perform algorithms, refines the trigger objects and applies topological requirements. The Global Trigger uses a Global Common Module as the building block of its design. To achieve a high input and output bandwidth and substantial processing power, the Global Common Module will host the most advanced FPGAs and optical modules. In order to evaluate the new generation of optical modules and FPGAs running at…

VirtexPhysics - Instrumentation and DetectorsLarge Hadron Colliderbusiness.industryComputer scienceBandwidth (signal processing)FOS: Physical sciencesInstrumentation and Detectors (physics.ins-det)High Energy Physics - ExperimentHigh Energy Physics - Experiment (hep-ex)Data acquisitionUpgradebusinessField-programmable gate arrayHost (network)Computer hardwareParticle Physics - ExperimentBlock (data storage)
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ISFET drawbacks minimization using a novel electronic compensation

2004

Ion sensitive field effect transistor (ISFET) and membrane field effect transistor (MEMFET) have some drawbacks related to: long-term drift, hysteresis and thermal drift. These factors limit the accuracy of ISFET/MEMFET based measurements systems, specially for continuous or long period measurements. Due to its accuracy, repeatability and easy-to-use features, electronic instrumentation systems are the best tools to design ISFET/MEMFET based measurement systems. A well-designed hardware and a qualified virtual instrumentation software are the key factors to overcome and compensate hysteresis, thermal and long-term drifts ISFET/MEMFET limitations. The paper is dedicated to show an instrument…

Virtual instrumentationComputer scienceSystem of measurementMetals and AlloysCondensed Matter PhysicsSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsCompensation (engineering)Materials ChemistryElectronic engineeringField-effect transistorInstrumentation (computer programming)Electrical and Electronic EngineeringISFETElectronic hardwareInstrumentationVoltageSensors and Actuators B: Chemical
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