Human vision is extremely sensitive to equidistance of spatial intervals in the frontal plane. Thresholds for spatial equidistance have been extensively measured in bisecting tasks. Despite the vast number of studies, the informational basis for equidistance perception is unknown. There are three possible sources of information for spatial equidistance in pictures, namely, distances in the pict...

the manner of understanding of muslims mystics such as ghazzali, sohrevardi and najmeddin kubar about light, degrees of lights, coloured lights and realm of imagination is an issue that this essay intends to study it. in this research, the matters about the influence of gnostics thoughts and islamic theologians on persian painting are presented. certainly if the artist is qualified for deep of ...

This study was conducted to develop a noninvasive method of bone marrow cellularity evaluation in solvent-exposed painters. Six painters with hypocellular marrow and 132 referents were examined using magnetic resonance imaging (MRI). Full examination of the peripheral blood and bone marrow biopsy was done on each patient. Signal indices were calculated from the signal intensities measured at th...

Environmental and biological monitoring of lead, cadmium and chromium levels in spray painters is reported. All of the study subjects worked in automobile body repair shops that had no standard spraying room. They were divided into 2 groups, those who wore an aerosol-removing respirator while spraying (n=20) and those who did not wear the respirator (n=50). Air in the breathing zone of each sub...

Main purpose of our study was to examine whether painters with long-term exposure to mixtures of organic solvents show slight dysfunctions in color vision ability. The study population consisted of 140 men with chronic exposure to organic solvents from paint and thinners (mean duration of exposure: 26 years). We used the Lanthony Desaturated Panel-D-15 (LDP-D15) to test color vision and calcula...

OBJECTIVES To determine the effectiveness of protective suits and gloves by biomonitoring. METHODS Fifteen male spray painters at a ship coating factory were studied for two weeks. Workers wore no protective clothing during the first week and wore protective suits and gloves during the second week. Sampling was conducted on four consecutive working days each week. Ethyl benzene and xylene in ...

David Hockney’s recent book Secret Knowledge: Rediscovering the Lost Techniques of the Old Masters argues that 15thcentury painters employed optical devices to achieve realistic portraiture. A reexamination of the history of optical projection techniques raises problems for Hockney’s provoc-

background: solvents, which are widely used in industry, are able to dissolve another substance for creating a solution. solvents have various effects on human health based on their type and chemical composition. methods: this was a cross-sectional study to investigate the harmful effects of solvents on wood painters in yazd city. to achieve information, a census questionnaire was prepared and ...