The color and luminance distributions of large light sources are difficult to measure because of the size of the source and the physical space required for the measurement. We describe a method for the measurement of large light sources in a limited space that efficiently overcomes the physical limitations of traditional far-field measurement techniques. This method uses a calibrated, high dyna...

Intrarater and interrater reliability were determined for middle finger range of motion (ROM) using the Rolyan finger goniometer. Seven raters measured ROM 3 times (trials) on 20 healthy adults. Intraclass reliability analysis and analysis of variance was used to assess the consistency and stability of measures. Level of significance was set at p < or = .05. Significant differences (p < .05) ex...

Polyurethane elastomers coating were synthesised by using typical diisocyanates, polyether and polyester polyols and HO-tertiary amines or diols as a chain extenders. Mole fractions of structural fragments (κexp) responsible for the polar interactions within polyurethane chains were calculated by 1H NMR method. Obtained results were confronted with the analogous parameter values (κtheor) calcul...

Understanding trigonometry relational system is a school mathemat-ics demanding topic. The angle, the unit circle and trigonometric functions are its foundational notions. Trigonometric contents mean-ing their understanding involve these three concepts re-lationships. This research aims to deepen in pre-service teachers’ about function when converting notions between two repre-sentation systems...

We have examined the light-scattering properties of inhomogeneous biological cells through a combination of theoretical simulations and goniometric measurements. A finite-difference time-domain (FDTD) technique was used to compute intensity as a function of scattering angle for cells containing multiple organelles and spatially varying index of refraction profiles. An automated goniometer was c...

We have constructed a new facility at the National Institute of Standards and Technology (NIST) to measure the index of refraction of transmissive materials in the wavelength range from the visible to the vacuum ultraviolet. An etalon of the material is illuminated with synchrotron radiation, and the interference fringes in the transmittance spectrum are measured using a Fourier transform spect...

At PTB different laser scatterometers with partly novel and outstanding metrological capabilities have been developed and are available for high-resolution dimensional metrology of periodic nanostructures. Two different systems are described and their metrological potential discussed: a laser diffractometer for pitch calibration and a versatile goniometric scatterometer for multi-parameter char...

Development of a calibration facility for spectroradiometric, colorimetric, and goniometric measurements of displays, display colorimeters, and spectroradiometers has been completed at the National Institute of Standards and Technology (NIST). An overview of the facility and results of the characterization measurements are presented. The results show that the facility is capable of measuring co...