ListarArtículos por tema "PHYSICS, ATOMIC, MOLECULAR AND CHEMICAL"
Mostrando ítems 1-18 de 18
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A Featureless Approach to 3D Polyhedral Building Modeling from Aerial Images
(MDPI, 2011)This paper presents a model-based approach for reconstructing 3D polyhedral building models from aerial images. The proposed approach exploits some geometric and photometric properties resulting from the perspective ... -
A Novel Micro- and Nano-Scale Positioning Sensor Based on Radio Frequency Resonant Cavities
(MDPI, 2014-06)In many micro- and nano-scale technological applications high sensitivity displacement sensors are needed, especially in ultraprecision metrology and manufacturing. In this work a new way of sensing displacement based on ... -
A Self-Referencing Intensity Based Polymer Optical Fiber Sensor for Liquid Detection
(MDPI, 2009-08)A novel self-referencing fiber optic intensity sensor based on bending losses of a partially polished polymer optical fiber (POF) coupler is presented. The coupling ratio (K) depends on the external liquid in which the ... -
A Temperature Sensor Based on a Polymer Optical Fiber Macro-Bend
(MDPI, 2013-10)The design and development of a plastic optical fiber (POF) macrobend temperature sensor is presented. The sensor has a linear response versus temperature at a fixed bend radius, with a sensitivity of 1.92.10(-3) (degrees ... -
An Embedded Stress Sensor for Concrete SHM Based on Amorphous Ferromagnetic Microwires
(MDPI, 2014-11)A new smart concrete aggregate design as a candidate for applications in structural health monitoring (SHM) of critical elements in civil infrastructure is proposed. The cement-based stress/strain sensor was developed by ... -
An Optical Fiber Bundle Sensor for Tip Clearance and Tip Timing Measurements in a Turbine Rig
(MDPI, 2013-06)When it comes to measuring blade-tip clearance or blade-tip timing in turbines, reflective intensity-modulated optical fiber sensors overcome several traditional limitations of capacitive, inductive or discharging probe ... -
Classifier Subset Selection for the Stacked Generalization Method Applied to Emotion Recognition in Speech
(MDPI, 2016-01)In this paper, a new supervised classification paradigm, called classifier subset selection for stacked generalization (CSS stacking), is presented to deal with speech emotion recognition. The new approach consists of an ... -
Dealing with the Effects of Sensor Displacement in Wearable Activity Recognition
(MDPI, 2014-06)Most wearable activity recognition systems assume a predefined sensor deployment that remains unchanged during runtime. However, this assumption does not reflect real-life conditions. During the normal use of such systems, ... -
Design and Development of a Low-Cost Optical Current Sensor
(MDPI, 2013-10)In this paper we demonstrate the design of a low-cost optical current sensor. The sensor principle is the Faraday rotation of a light beam through a magneto-optical material, SF2, when a magnetic field is present. The ... -
Design of a Sensor Based on Plastic Optical Fibre (POF) to Measure Fluid Flow and Turbidity
(MDPI, 2009-05)Although many optical fibre applications are based on their capacity to transmit optical signals with low losses, it can also be desirable for the optical fibre to be strongly affected by a certain physical parameter in ... -
Fiber Bragg Gratings, IT Techniques and Strain Gauge Validation for Strain Calculation on Aged Metal Specimens
(MDPI, 2011-01)This paper studies the feasibility of calculating strains in aged F114 steel specimens with Fiber Bragg Grating (FBG) sensors and infrared thermography (IT) techniques. Two specimens have been conditioned under extreme ... -
FTT-MA: A Flexible Time-Triggered Middleware Architecture for Time Sensitive, Resource-Aware AmI Systems
(MDPI, 2013-05)There is an increasing number of Ambient Intelligence (AmI) systems that are time-sensitive and resource-aware. From healthcare to building and even home/office automation, it is now common to find systems combining ... -
Hole-Phonon Relaxation and Photocatalytic Properties of Titanium Dioxide and Zinc Oxide: First-Principles Approach
(Hindawi Publishing, 2014)First-principles calculations for the temporal characteristics of hole-phonon relaxation in the valence band of titanium dioxide and zinc oxide have been performed. A first-principles method for the calculations of the ... -
On the Selection of Non-Invasive Methods Based on Speech Analysis Oriented to Automatic Alzheimer Disease Diagnosis
(MDPI, 2013-05)The work presented here is part of a larger study to identify novel technologies and biomarkers for early Alzheimer disease (AD) detection and it focuses on evaluating the suitability of a new approach for early AD diagnosis ... -
Proof of Concept of Impact Detection in Composites Using Fiber Bragg Grating Arrays
(MDPI, 2013-09)Impact detection in aeronautical structures allows predicting their future reliability and performance. An impact can produce microscopic fissures that could evolve into fractures or even the total collapse of the structure, ... -
RESTful Discovery and Eventing for Service Provisioning in Assisted Living Environments
(MDPI, 2014-05)Service provisioning in assisted living environments faces distinct challenges due to the heterogeneity of networks, access technology, and sensing/actuation devices in such an environment. Existing solutions, such as ... -
Thin Magnetically Soft Wires for Magnetic Microsensors
(MDPI, 2009-11)Recent advances in technology involving magnetic materials require development of novel advanced magnetic materials with improved magnetic and magneto-transport properties and with reduced dimensionality. Therefore magnetic ... -
Virtual Sensors for On-line Wheel Wear and Part Roughness Measurement in the Grinding Process
(MDPI, 2014-05)Grinding is an advanced machining process for the manufacturing of valuable complex and accurate parts for high added value sectors such as aerospace, wind generation, etc. Due to the extremely severe conditions inside ...