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The helix of sustainability - the Carbon cycle ideal for manufacture and use The international recycling symbol - not nature identical.. The helix of sustainability is a concept coined to help the manufacturing industry move to more sustainable practices by mapping its models of raw material use and reuse onto those of nature.
The triple helix model of innovation, as theorized by Etzkowitz and Leydesdorff, is based on the interactions between the three following elements and their associated 'initial role': [9] universities engaging in basic research, industries producing commercial goods and governments that are regulating markets. [2]
For example, do, mi, and so are stable in appearance, whereas fa and ti point in the direction of mi and do, respectively. Likewise, the hand sign for re suggests motion to do, and that of la to so. Kodály added to Curwen’s hand signs upward/downward movement, allowing children to actually see the height or depth of the pitch.