Abstract: An image-based hemoglobin estimation tool for measuring hemoglobin can be embedded in hand held devices such as smartphones, and similar known and to be developed technology. The hand-held device acquires video data of a finger illuminated from the dorsal surface by a first near infrared light responsive to hemoglobin and a second near infrared light near responsive to plasma. The acquired video is segmented into frames and processed to produce a Photoplethysmography (PPG) waveform. The features of the PPG waveform can then be identified, and the waveform and corresponding features evaluated by a predictive hemoglobin model. The predictive hemoglobin model can be provided at a remote computer, enabling non-invasive hemoglobin analysis from point of care locations. Near infrared lights of 850 nm and 1070 nm are particularly effective in the process.

Abstract: A retractable ramp or runway is pivotally connected to the bed of a truck or trailer to facilitate the loading of heavy machinery or equipment upon the bed. Fluid pressure actuated members are connected to the ramp or runway for elevating same from an inclined position to a position level with the bed of the truck or trailer.

Abstract: A flat bed truck or trailer is provided with extensible side plate members or segments to increase the area of the truck or trailer bed. The side members are capable of being retracted when not in use so as to lie substantially within the area of the truck or trailer bed. When in their extended position, the side members are provided with suitable supports to lend strength and rigidity thereto. The increased bed area enables farm machines, such as tractors, combines, windrowers and the like as well as off highway earth working machinery to be readily supported thereon while being transported from one area to another.