Stokes (1) reported that the colored substance in blood carries oxygen. This was followed by Hoppe-Seyler (2), who first crystallized this substance and coined the term hemoglobin. Additionally, it was shown that the pattern of light absorption changes when shaken with air (2). Hertzman (3) described using photoelectric plethysmography of fingers and toes as a dynamic analysis of the peripheral...

To improved photoelectric detection performance and enhance the target recognition rate in photoelectric detection system, this paper set up target optical property model in photoelectric detection area based on the theoretical knowledge of illumination, analyze the influence factor of detection system, give the calculation and deduction; set up the D-S data fusion reasoning model and research ...

Male rats with a chronically implanted device that allowed photoelectric plethysmographic measures to be made of the stomach wall were trained while paralyzed with d-tubocurarine and being artificially respirated. One group was reinforced by avoidance of and/or escape from electric shocks to the tail, whenever increases in the transmission of light through the stomach wall occurred during a CS;...