wave measurement Articles

  • Blast wave characteristics and its influence with distance of measurement

    Extraction of locked-up coal pillars by opencast method and the presence of dwellings in proximity to excavation area lead to specialised drilling and blasting plan for safety of structures and humans. Introduction of improper bench layout, mismatched drilling equipment and blast geometry enhances discomfort for local inhabitants. Blast-induced vibration magnitude also shows poor attenuation rate ...


    By Inderscience Publishers

  • TDS-3: making waves

    It is hard to imagine that an instrument weighing only 2 oz could make ripples in the water industry. The pocket-sized TDS-3 meter from HM Digital, however, is doing just that. After less than a decade on the U.S. market, this meter has become one of the most popular handheld TDS meters for water professionals. HM Digital attributes the success of this meter to its high quality, features, and the ...


    By HM Digital, Inc.

  • Study of Geoprocesses with Complementary Mechanical and Electromagnetic Wave Measurements in an Oedometer

    Particulate geomaterials can be uniquely studied with wave-based techniques. Electromagnetic and mechanical waves interact with the tested material, exciting different phenomena and revealing different information. Complementary wave measurements were implemented in a modified oedometric cell to study and to monitor different processes in geomaterials. The cell and the measuring devices are ...


    By ASTM International

  • Trace Oxygen measuring systems for Reflow and Wave solder machines

    Systech Illinois are the only company that has the option of RACE™ cell technology. What is the RACE™ cell? It is a patented dual cell technology which employs a second fuel cell to protect the first cell from being exposed to high concentrations of O2. What does it do?  ...


    By Systech Instruments Ltd

  • Measurement of Shear Waves in Laboratory Specimens by Means of Piezoelectric Transducers

    The use of piezoelectric ceramics to measure shear wave velocity in laboratory soil specimens is discussed. The experimental technique and interpretative methodology are described. Both bender and flat-plate ceramic elements were employed, and each performed well. Interpretation of the shear waveforms generated with each transducer improved as the number of wavelengths between the source and ...


    By ASTM International

  • Dynamic rotary torque measurement using surface acoustic waves

    The subject of torque measurement has previously been addressed extensively. Most of the existing transducers either rely on low voltage analogue systems (e.g. conventional resistive strain gauge) or complicated mechanical assemblies by physically assessing displacement, i.e. optical systems. This paper identifies a new, potentially low cost, non-contact, frequency domain strain torque sensor1 ...


    By Sensor Technology Ltd

  • How to avoid the GHS Tidal Wave

    Chemical safety touches us all. It impacts the food we eat, our health and our lifestyle. Impediments to safety can endanger individuals, businesses and society in general. Common sense dictates that sound chemical management should rely on a single classification and labeling system to address specific use patterns and groups of chemicals at the national, regional and international levels. Such ...


    By 3E Company

  • Rotating angled plate diffusing wave spectroscopy

    Solid–like non–ergodic samples can be difficult to study using standard single speckle diffusing wave spectroscopy as the measurement may lack requisite ensemble averaging. We demonstrate here that this required ensemble averaging can be induced by translating the speckle over the collection optics so that multiple speckles are observed over the duration of the experiment. Translation is achieved ...


    By Inderscience Publishers

  • Ultrasonic waves lead to liquid cavitation creation

    Theoretically liquid starts boiling when pressure in some sites of a stream decreases to pressure of its saturated steam. Actually pressure of liquid cavitation creation process depends on the physical condition of liquid. If liquid contains a large amount of the dissolved air, reduction of pressure leads to air allocation from liquid and formation of gas cavities (cavities) in which pressure is ...


    By GlobeCore Blending

  • Kinematic wave computation using an efficient implicit method

    The kinematic wave theorem is the simplest and widely employed distributed routing method used in practical applications for the computation of flood wave propagation in overland and open-channel flows with steep topography. In this paper, an efficient finite-difference implicit MacCormack scheme is developed for the simulation of one-dimensional kinematic wave flows. Simulated results are ...


    By IWA Publishing

  • Ultrasonic waves lead to liquid cavitation creation

    Theoretically liquid starts boiling when pressure in some sites of a stream decreases to pressure of its saturated steam. Actually pressure of liquid cavitation creation process depends on the physical condition of liquid. If liquid contains a large amount of the dissolved air, reduction of pressure leads to air allocation from liquid and formation of gas cavities (cavities) in ...


    By PC GlobeCore

  • A Nonlinear One-Dimensional Wave Analysis of a Triaxial Soil Specimen

    A fast triaxial shear device (FTRXD) loads cylindrical soil specimens, displacing the top of the specimen downward and axially at a controlled and very rapid rate. Load and displacement at the specimen top and load at the bottom are measured; specimens are subjected to constant confining pressures. Nonlinear, one-dimensional wave analysis of the specimen was undertaken, using finite-difference ...


    By ASTM International

  • Comparison of profiling results of attenuation and velocity of refracted P-wave in coal-seam

    In the paper the problem of effectiveness of seismic profiling of attenuation and velocity of refracted Pwave in coal-seam along mining excavation in conditions of coal-seam edge impact has been presented. For practical use of seismic attenuation profiling, special measurement and interpretation methodology has been prepared. The measure of calculated attenuation is the value of attenuation ...


    By GEOSPECTRUM S.C.

  • Modelling the motion of an internal solitary wave over a bottom ridge in a stratified fluid

    A series of laboratory experiments has been carried out to investigate the passage of an internal solitary wave of depression over a bottom ridge, in a two-layer fluid system for which the upper and lower layer is linearly-stratified and homogeneous respectively. Density, velocity and vorticity fields induced by the wave propagation over the ridge have been measured simultaneously at three ...


    By Springer

  • Study on hydrodynamics and heat transfer of solitary wave on film flow with CFD method

    In this paper, a capacitance probe and high speed camera are adopted to study the solitary wave of falling film on large flat plate experimentally. Two types of solitary wave are studied with a Computational Fluid Dynamic (CFD) method based on the measuring data. The water–air shear stress on the interface of the solitary wave is modelled in the numerical calculation. The results indicate that ...


    By Inderscience Publishers

  • National Grid Alert Triggers Wave of Enquiries for Renewables Sector

    UrbanWind today reported a sharp increase in companies enquiring about on-site power generation, following National Grid’s warning yesterday.   It said growing numbers of British businesses were now looking to move towards ‘energy independence’ to protect themselves from the rising threat of future brownouts. ...


  • The next wave of sustainable planning: green neighbourhood assessment systems

    Since the 1970s, seeking solutions for global environmental problems have been on the agenda of both national and international debates where quantifying and measuring 'sustainability' have been an emerging foci. Within this perspective, analysis of areas through new methods and measurable parameters is among recent research fields in both academia and practice. To this end, in the literature, ...


    By Inderscience Publishers

  • Radar measurement in the North Sea

    Background / Task The NLWKN operates the barrier in the inland waterway of the river Ems. They are working with a dense monitoringnetwork which is required e.g. for the preservation of evidence in case of blocks for the protection against storm tides or if the water depth has to be increased to make the Ems navigable for big vessels coming from the dockyard. After an average a new radar ...

  • A Guide to Noise Measurement Terminology

    There are 100s of different acoustic parameters that can be used during your noise measurements. Each parameter can tell you something different the noise you’re monitoring. How do you remember what all this noise measurement terminology means and what it does? We’ve already covered ...


    By Cirrus Research plc

  • Flood Resilience Measures

    Flood risk management is a top priority, exacerbated by the perception that flood risk has increased during the last two decades in many regions. There are two hypotheses for such changing patterns: Changes in climate, e.g. the sequencing of extreme wet and dry periods, leading to a greater magnitude and/or frequency of hydrological extremes (Huntington 2006); and ...


    By IWA Publishing

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