Abstract: Provided herein are methods and systems for rapid identification and quantification of the taxonomic composition of a microbial metagenome in a sample, based on compositional spectra analysis. The methods and systems are useful in diagnostic and analytic methods in the clinic and in the field.

Abstract: A wheelchair transportation system for transporting a wheelchair over at least one obstacle, including a wheelchair transportation unit being operable to transport the wheelchair over the at least one obstacle during at least one transportation operation of the wheelchair. The wheelchair transportation unit includes a pivotal support platform configured to support the wheelchair and pivotally coupled to a chassis of the wheelchair transportation unit, the pivotal support platform includes at least one group of rotating members frictionally engaging at least one main wheel of the wheelchair. During the at least one transportation operation, the at least one main wheel being operable to rotate the at least one group of rotating members thereby a wheelchair user operably controls and guides the wheelchair transportation unit by adjusting at least one rotational speed of the at least one main wheel.