Microstructure–texture relationships of aerated sugar gels: Novel measurement techniques for analysis and control

2013 ◽  
Vol 18 ◽  
pp. 202-211 ◽  
Author(s):  
Els Herremans ◽  
Evi Bongaers ◽  
Pascal Estrade ◽  
Ewa Gondek ◽  
Maarten Hertog ◽  
...  
Keyword(s):  
Measurement Techniques ◽  
And Control

The Teaching of Measurement and Instrumentation for Industrial Needs

1969 ◽  
Vol 2 (10) ◽  
pp. 377-380
Keyword(s):  
Measurement Techniques ◽  
Important Thing ◽  
Industrial Needs ◽  
And Control ◽  
Measurement And Control ◽  
Modern Industry

Held in January, 1969, this symposium most aptly emphasised the necessity for the closest collaboration between the universities and industry at all levels for education in the inter-disciplinary subject of measurement and control. The important thing is that control cannot be accomplished in reality without the basis of a sound knowledge of the science of measurement. Furthermore educational outlook must be focused on the immense possibilities that exist in research in measurement techniques and also in the development of the refinements that are demanded by the requirements of modern industry. The papers which follow present, except for the first which ended the presentation of ‘Industrial Requirements’, the ‘Academic Viewpoint’

Measurement Techniques to Monitor and Control Fluidization Quality in Fluidized Bed Dryers: A Review

2014 ◽  
Vol 32 (9) ◽  
pp. 1005-1051 ◽  
Author(s):  
Mortaza Aghbashlo ◽  
Rahmat Sotudeh-Gharebagh ◽  
Reza Zarghami ◽  
Arun S. Mujumdar ◽  
Navid Mostoufi
Keyword(s):  
Fluidized Bed ◽  
Measurement Techniques ◽  
And Control ◽  
Monitor And Control

Measurement of Wood Wettability by the Wilhelmy Method. Part 1. Contamination of Probe Liquids by Extractives

Holzforschung ◽  
2001 ◽  
Vol 55 (1) ◽  
pp. 21-32 ◽  
Author(s):  
M.E.P. Wålinder ◽  
I. Johansson
Keyword(s):  
Surface Tension ◽  
Contact Angle ◽  
Measurement Techniques ◽  
Contact Angle Measurement ◽  
Angle Measurement ◽  
Liquid Interface ◽  
Wood Extractives ◽  
And Control

Summary This work focuses on the influence of extractives during wetting measurements on wood. Fresh and aged veneers of extracted and non-extracted heart- and sapwood of pine were prepared, and the Wilhelmy method was used to study the wettability of these veneers. In this method, the force acting on the veneers was measured during immersion in and withdrawal from a series of probe liquids. The results suggest that some of the probe liquids become severely contaminated by extractives during the measurements on the non-extracted veneers, and that this strongly affects the wood wetting measurements. The contamination is effectively detected as a distinct decrease in the surface tension of the liquids caused by dissolution or presence of wood extractives at the wood-liquid interface. It is important to note that such contamination may also occur during wetting studies on wood using other contact angle measurement techniques. The most obvious contamination occurred in the case of measurements on non-extracted veneers immersed in water and formamide. Generally, no contamination was detected in the case of measurements on extracted wood veneers. The Wilhelmy method may provide an efficient means for recording and control of any contamination of the probe liquids that may arise during wetting studies on wood.

Analysis of Periodical Microstructures Using Optical Methods

2012 ◽  
Vol 433-440 ◽  
pp. 2021-2028
Author(s):  
Arvydas Palevicius ◽  
Giedrius Janusas
Keyword(s):  
Measurement Techniques ◽  
Optical Methods ◽  
Geometrical Parameters ◽  
Optical Parameters ◽  
Optimization And Control ◽  
Indirect Evaluation ◽  
Experimental Values ◽  
And Control ◽  
Optical Laser

In this work we present an optical laser based method for characterization of periodical microstructure. It allows indirect evaluation of geometrical and optical parameters of periodical microstructures. Proposed method is applicable for optimization and control of technological processes in the cases when traditional measurement techniques are not suitable. The main experimental results are compared with the computer simulations where the standard programs PCGrate-SX6.0 and and GSolver V4.20b were employed. Error of estimation of geometrical parameters of periodical microstructures by comparing theoretical and experimental values of diffraction efficiencies of periodical microstructures is less than 5%.

Development of ZrO2-TiO2 Porous Ceramic as Soil Humidity Sensor for Application in Environmental Monitoring

2006 ◽  
Vol 530-531 ◽  
pp. 414-419 ◽  
Author(s):  
Rodrigo de Matos Oliveira ◽  
Maria do Carmo de Andrade Nono ◽  
Carlos Kuranaga ◽  
M. Wada
Keyword(s):  
Environmental Monitoring ◽  
Humidity Sensor ◽  
Porous Ceramic ◽  
Mercury Porosimetry ◽  
Measurement Techniques ◽  
Liquid Limit ◽  
Sensor Element ◽  
Soil Humidity ◽  
Automation And Control ◽  
And Control

Due to the necessity of the automation and control of processes in agriculture, as well as to the crescent interest for the environmental monitoring, efforts have been demanded in the development of more versatile, reliable sensors and sensor systems with smaller cost [1-2]. In this sense, the search of new materials, the modeling study of sensor and the development of new measurement techniques and processing of signs have been orientating the progress in this area [3-4]. In this work, the results of the characterization analyses of sensor elements of ZrO2-TiO2 porous ceramic for application as soil humidity sensor, are shown and discussed. These ceramics were obtained from the mechanical mixture of ZrO2- TiO2 powders and sintered at 1000, 1100 and 1200 oC, for obtaining different porosities. The characterization of the ceramic was carried out using measurements of B.E.T.; nitrogen and mercury porosimetry; scanning electronic microscopy and X-ray diffraction. The porous ceramic characterization as soil humidity sensor element was accomplished through capacitance and impedance measurements using a RLC bridge. The ceramic sensor elements were immersed in the selected and previously characterized soils, the humidities of which were defined in accordance with Atterberg limits, more exactly liquid limit. The results obtained for specific surface area, distribution curves of pore size, microstructure, crystalline phases and sensibility to the soil humidity showed that the ZrO2-TiO2 porous ceramic sintered at 1100 oC presents a great potential to be applied as sensor element for soil humidity monitoring.

scholarly journals A network-based perspective on coherent structure detection from very-sparse Lagrangian data

2021 ◽  
Vol 1 (1) ◽  
Author(s):  
Giovanni Iacobello ◽  
David E. Rival
Keyword(s):  
Coherent Structure ◽  
Measurement Techniques ◽  
Three Dimensional ◽  
Coherent Motion ◽  
Modeling And Control ◽  
Structure Detection ◽  
Spatio Temporal ◽  
Lagrangian Data ◽  
And Control ◽  
Lagrangian Flow

Coherent structure detection (CSD) is a long-lasting issue in fluid mechanics research as the presence of spatio-temporal coherent motion enables simpler ways to characterize the flow dynamics. Such reducedorder representation, in fact, has significant implications for the understanding of the dynamics of flows, as well as their modeling and control (Hussain, 1986). While the Eulerian framework has been extensively adopted for CSD, Lagrangian coherent structures have recently received increasing attention, mainly driven by advancements in Lagrangian flow measurement techniques (Haller, 2015; Hadjighasem et al., 2017). Lagrangian particle tracking (LPT), in particular, is widely used nowadays due to its ability to quantity fluid-parcel trajectories in three-dimensional volumes (Schanz et al., 2016).

scholarly journals Reliability monitoring of broadband access networks

2017 ◽  
Vol 42 (1) ◽  
pp. 273-282
Author(s):  
Krzysztof Perlicki ◽  
Mirosław Siergiejczyk ◽  
Marek Stawowy
Keyword(s):  
Optical Fiber ◽  
Signal Transmission ◽  
Measurement Techniques ◽  
Access Network ◽  
Optical Signal ◽  
Access Networks ◽  
Critical Issues ◽  
Reliability Monitoring ◽  
And Control ◽  
Anomalous Condition

AbstractOne of the critical issues for broadband accesss is how to test the access network infrastructure and quality of optical signal. The installation and powering up of an optical fiber access networks requires measurement techniques for verifying the link has been configured properly and that its constituent components are functioning correctly. Maintenance functions for a broadband optical access network are classified in two main categories: preventive maintenance and post-fault maintenance. The first one consists of: surveillance (to detect degradation in optical fiber components, or any other anomalous condition not preventing the signal transmission,), testing (to measure and locate any detected degradation or anomalous condition) and control (fiber identification and fiber transfer to allow the testing of the link.). In turn second one consisits of: surveillance (to detect alarms or trouble reports and activate a procedure for restoration), testing (to locate the fault and/or verify the carrier performances after the restoration) and remedy (fiber identification, fiber repair or fiber transfer to restore the link).

Single-Beam Z-Scan: Measurement Techniques and Analysis

1997 ◽  
Vol 06 (03) ◽  
pp. 251-293 ◽  
Author(s):  
P. B. Chapple ◽  
J. Staromlynska ◽  
J. A. Hermann ◽  
T. J. Mckay ◽  
R. G. Mcduff
Keyword(s):  
Beam Quality ◽  
Measurement Techniques ◽  
Optical Power ◽  
Single Frequency ◽  
Optical Nonlinearities ◽  
Single Beam ◽  
Optical Propagation ◽  
Experimental Parameters ◽  
And Control ◽  
Optical Power Limiting

The Z-scan technique is a popular method for measuring degenerate (single frequency) optical nonlinearities using a single laser beam. In order to perform reliable measurements, it is necessary to carefully characterize and control a number of experimental parameters, such as the beam quality, the power and temporal characteristics of the laser, the collection aperture size and position, the sample reflectivity, sample thickness and imperfections in the sample. Failure to control these parameters leads to inaccurate determinations of the nonlinearities. In this paper, we review the theory of Z-scan and examine each of these issues from experimental and theoretical viewpoints. This work will be of interest to anyone who performs Z-scan experiments and to those interested in optical power limiting and nonlinear optical propagation.

Surface Subsidence Engineering

2020 ◽  
Keyword(s):  
Measurement Techniques ◽  
Coal Mines ◽  
The United States ◽  
Surface Subsidence ◽  
Underground Coal Mining ◽  
Abandoned Coal Mines ◽  
Australian Coal ◽  
And Control ◽  
Overburden Strata

Underground coal mining disturbs both the overburden strata and the immediate floor strata. The subject of surface subsidence deals with the issues associated with the movement of overburden strata, which are the layers from the seam to the surface, where structures and water resources important to human activities are located. Surface Subsidence Engineering provides comprehensive coverage of the major issues associated with surface subsidence. The chapters are written by experts on surface subsidence in the three leading coal producing and consuming countries in the world: Australia, China and the United States. They discuss general features and terminologies, subsidence prediction, subsidence measurement techniques, subsidence impact on water bodies, subsidence damage, mitigation and control, and subsidence on abandoned coal mines. In addition, the final chapter addresses some of the unique features of surface subsidence found in Australian coal mines. The book provides information on coal seams ranging from flat to gently inclined to steep to ultra-steep seams. Written for mining engineers, geotechnical engineers and students of mining engineering, this book covers both theories and practices of surface subsidence. Unlike previous publications, it also deals with the subsidence impact on surface and groundwater bodies, crucial resources that are often neglected by subsidence researchers.

Development of certified reference materials set for opened porosity of solid substances and materials

2021 ◽  
pp. 58-66
Author(s):  
Egor P. Sobina ◽  
Ilya P. Aronov
Keyword(s):  
Reference Materials ◽  
Open Porosity ◽  
Certified Reference Materials ◽  
Measurement Techniques ◽  
Measuring Instruments ◽  
Measurement Results ◽  
And Control ◽  
Porosity Measurements ◽  
Calibration Laboratories ◽  
Certified Values

The article deals with data of research for development of certified reference materials set for opened porosity of solid substances and materials (imitators) (OPGP SO UNIIM set) GSO 11116-2018/GSO 11119-2018. The certified values of open porosity are determined using a gas pycnometer. Certified reference materials are intended for certification of measurement techniques and control of the accuracy of open porosity measurement results for petrophysical studies of core. Certified reference materials can be used for calibration, verification of open porosity measurements of rock and for testing of measuring instruments. A complete budget of the CRM uncertainty is presented, taking into account changes in ambient temperature when it used in testing and calibration laboratories.

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