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Pulmonary function test (PFT) values of 50 healthy subjects and levels of pollutants like suspended particulate matter (SPM), PM10, PM2.5 in ambient air were continually investigated from February 2007 to January 2010 at Patiala, Punjab (India). Significant decrease in PFTs were observed with increase in concentration levels of pollutants during wheat and rice crop residue burning in the fields. In...
The aim of the submitted work is to study the influence of applied loads ranging from 0.09807 to 0.9807 N on microhardness. Whereas standard reference block with defined specified hardness and its uncertainty was used as a specimen, individual measurement involved indirect calibration of tester. The measurement was repeated for estimation of the variability of results. The influence of applied load...
At present, KIM LIPI is able to provide self-traceability in the scope of hygrometer calibrations in the range of 10–95 %RH using commercial two-pressure humidity generator as the standard which, previously, was traceable to SI unit through another NMI. In order to examine the calibration system, uncertainty of the calibration results was evaluated by performing characterization including measurement...
This paper presents the development of a reliable heat index (HI) measurement system for evaluating the thermal comfort of a particular building or a particular area. The HI is an index that combines air temperature and relative humidity (RH) to determine the human-perceived equivalent temperature. To measure the air temperature and RH, temperature to digital converter and RH to voltage converter...
Present paper reports the design and developmental aspects of a new technique for ultrasonic phase velocity measurement in liquids, which is based on the studies carried out on frequency dependence of ultrasonic velocity in pure, binary and ternary liquids/mixtures. The design and developmental aspects of the experimental set up are reported along with optimisation of data acquisition software developed...
This paper determines and compares the temperature coefficient of the standard inductors, manufactured by General Radio, using three different methods. The temperature coefficients have been determined by observing the change in inductance at 1 kHz and change in resistance at 1 kHz and 20 Hz. The standard inductor has been measured using precision LCR meter in a controlled and stable environment....
Usually, ultrasonic detection is obtained by conventional contact techniques. In some critical cases such as working at hard environmental conditions (hot oven or nuclear field) or sensitive surfaces, then non-contact optical techniques should be used. However, for all optical techniques, low sensitive ultrasonic detection still a common problem. This paper presents a self building homodyne laser...
Uncertainty evaluation for repeated measurements has been discussed previously by various researchers and two ways of proceeding were proposed, dependent upon whether or not there is a significative difference in the individual results of repeated measurements. In this paper, the analysis of variance perspective is used to clarify and unify the ideas of previous works. It is shown that the two above-mentioned...
Both in industry and research, the quality control of micrometric manufactured parts is based on the measurement of parameters whose traceability is sometimes difficult to guarantee. In some of these parts, the confocal microscopy shows great aptitudes to characterize a measurand qualitatively and quantitatively. The confocal microscopy allows the acquisition of 2D and 3D images that are easily manipulated...
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