Bandwidth characteristics and comparisons of surface texture measuring instruments

Measuring and Analyzing Pavement Texture Concrete Pavement Surface Characteristics Program

Introduction Pavement texture is defined by the irregularities on a pavement surface that deviate from an ideal, perfectly flat surface. As shown in Figure 1, the World Road Association (PIARC) has established standard categories of texture, classified by wavelength. These categories include microtexture (wavelengths up to 0.5 mm), macrotexture (0.5 to 50 mm), megatexture (50 to 500 mm), and ro...

Interpreting the probe-surface interaction of surface measuring instruments, or what is a surface?

When using dimensional measuring instruments it is assumed that there is a property of the object, which we call surface, that is present before during and after the measurement, i.e. the surface is a fundamental property of an object that can, by appropriate means, be used to measure geometry. This paper will attempt to show that the fundamental property ‘surface’ does not exist in any simple ...

Measuring Bandwidth

Accurate network bandwidth measurement is important to a variety of network applications. Unfortunately, accurate bandwidth measurement is difficult. We describe some current bandwidth measurement techniques: using throughput, pathchar[8], and Packet Pair [2]. We explain some of the problems with these techniques, including poor accuracy, poor scalability, lack of statistical robustness, poor a...

A Systematic Review of Instruments Measuring Family and Social Support of Breastfeeding Mothers

Background: Due to the low rate of breastfeeding among working mothers and support of interventions to increase the duration of breastfeeding, this systematic review conducted to evaluate psychometric properties of instruments measured mother’s perception of Breastfeeding Support. Materials and Methods: The search was carried in English language databases including Medline (via PubMed), Scopus,...

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