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The monitoring of crop phenology informs decisions in environmental and agricultural management at both global and farm scales. Current methodologies for crop monitoring using remote sensing data track crop growth stages over time based on single, scalar vegetative indices (e.g., NDVI). Crop growth and senescence are indistinguishable when using scalar indices without additional information (e.g., planting date). By using a pair of normalized difference (ND) metrics derived from hyperspectral data—one primarily sensitive to chlorophyll concentration and the other primarily sensitive to water content—it is possible to track crop characteristics based on the spectral changes only. In a two-dimensional plot of the metrics (ND-space), bare soil, full canopy, and senesced vegetation data all plot in separate, distinct locations regardless of the year. The path traced in the ND-space over the growing season repeats from year to year, with variations that can be related to weather patterns. Senescence follows a return path that is distinct from the growth path.

In Finding the Movement, Anne Enke reveals that diverse women's engagement with public spaces gave rise to and profoundly shaped second-wave feminism. Focusing on women's activism in Detroit, Chicago, and Minneapolis-St. Paul during the 1960s and 1970s, Enke describes how women across race and class created a massive groundswell of feminist activism by directly intervening in the urban landscape. They secured illicit meeting spaces and gained access to public athletic fields. They fought to open bars to women and abolish gendered dress codes and prohibitions against lesbian congregation. They created alternative spaces, such as coffeehouses, where women could socialize and organize. They opened women-oriented bookstores, restaurants, cafes, and clubs, and they took it upon themselves to establish women's shelters, health clinics, and credit unions in order to support women's bodily autonomy. By considering the development of feminism through an analysis of public space, Enke expands and revises the historiography of second-wave feminism. She suggests that the movement was so widespread because it was built by people who did not identify themselves as feminists as well as by those who did. Her focus on claims to public space helps to explain why sexuality, lesbianism, and gender expression were so central to feminist activism. Her spatial analysis also sheds light on hierarchies within the movement. As women turned commercial, civic, and institutional spaces into sites of activism, they produced, as well as resisted, exclusionary dynamics.