Using a function algebra characterization of exponential time due to Monien 5], in the style of Bellantoni-Cook 2], we characterize exponential time functions of linear growth via a safe course-of-values recursion scheme.

This article is a critical review of some of the methods that have been used for the sampling, analysis, and monitoring of vapor-phase toluene diisocyanate (TDI). Only some of the methods that have received relatively widespread application have been addressed in this article. This review includes a "tutorial style" discussion of basic definitions and basic principles and procedures of quality ...

Actinic erythema Polymorphous light eruption Tristimulus colorimeter Charles R. Taylor, MD, Instructor in Dermatology, Medical Director of Phototherapy, Massachusetts General Hospital, Bartlett Hall, Room 414, 32 Fruit Street, Boston, MA 02114 (USA) Garigue et al. [1J recently administered routine minimal erythema doses to 72 patients. They then used a tristimulus colorimeter to measure the ery...

• The rate and the magnitude of dis-coloration historical rag paper is inversely proportional to wavelength radiation (Λ). Oxygen concentration [O 2 ] relative humidity (RH) promote discoloration paper. affected by ], RH, Λ, * Λ RH Λ. Tristimulus transformation leads quantitative loss information in assessment. This discusses spectral sensitivity simultaneously Relative Humidity ambient environ...

Assessment of exposure to airborne endotoxins has been studied for several years, especially in occupational environments, but a large number of procedures are used for sampling and analysis. This lack of standardization makes it very difficult to compare results and set internationally accepted threshold limit values (TLVs) or occupational exposure limits (OELs) for endotoxin exposure. This pa...

A mathematically simple transformation from the Judd (1951) modified CIE space into the space spanned by the cones is derived. The transformation is based on geometrical intuition (Pitt 1945). Light fluxes that initiate vision are transmitted into electrical signals by the photoreceptors. In day light these are the retinal cones. Most humans have three types of cones with spectral sensitivities...

Uncertainties in source color measurements with a tristimulus colorimeter are estimated for calibration factors determined, based on a known source spectral distribution or on accurate measurements of the spectral responsivities of the colorimeter channels. Application is to the National Institute of Standards and Technology (NIST) colorimeter and an International Commission on Illumination (CI...

Although methods exist for predicting the color of a spot color ink when it overprints another ink, there is a need for a simplified model for the purpose of previewing that can be used during document creations. The proposed model characterizes each spot color individually and predicts the color of overprinting solids and halftones by linearly combining the reflectances of two colors. Each ink...

We discuss the uncertainties in chromaticity coordinates color matching experiment reported by MacAdam (Journal of Optical Society America, 1942). also derive cone-pigments based excitation space. The observer made matchings tuning angle a Rochon prism. intervals mismatch were obtained using average value and SD settings. use this work rigorous statistical method to probability density function...