Jesse H. Ausubel

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This article describes the mathematics underlying the Loglet Lab software package for loglet analysis. " Loglet analysis " refers to the decomposition of growth and diffusion into S-shaped logistic components, roughly analogous to wavelet analysis, popular for signal processing and compression. The term " loglet " joins " logistic " and " wavelet. " Loglet(More)
We introduce an extension to the widely-used logistic model of growth to a limit that in turn allows for a sigmoidally increasing carrying capacity, that is, the invention and diffusion of technologies which lift the limit. We study the effect of this dynamic carrying capacity on the trajectories of simple growth models, and we use the new model to(More)
expecting that more and richer people will demand more from the land, cultivating wider fields, logging more forests, and pressing nature, comes naturally. the past half-century of disciplined and dematerializing demand and more intense and efficient land use encourage a rational hope that humanity's pressure will not overwhelm nature. Beginning with the(More)
Renewables are not green. To reach the scale at which they would contribute importantly to meeting global energy demand, renewable sources of energy, such as wind, water and biomass, cause serious environmental harm. Measuring renewables in watts per square metre that each source could produce smashes these environmental idols. Nuclear energy is green.(More)
Like cities, forests grow by spreading out or by growing denser. Both inventories taken steadily by a single nation and other inventories gathered recently from many nations by the United Nations confirm the asynchronous effects of changing area and of density or volume per hectare. United States forests spread little after 1953, while growing density per(More)
  • bullet Holdren, bullet Waggoner, J H Ausubel, Rubin Ch
  • 2014
Expect some changes over the semester, announced at least 1 week in advance. Course Description and Objectives Heightened concern about both the availability of energy resources and their environmental impacts has increased demand for leaders and analysts who can navigate the political, economic, scientific, and technological dimensions of these issues to(More)
From the start, ocean use and resource exploitation by humans proceeded with limited knowledge of marine life and habitats. Even in the last century, biological knowledge of the oceans remained more limited than that of physical ocean processes such as storms, tsunamis from undersea earthquakes and teleconnections, like El Niñ o. Yet, human exploitation of(More)
Barcoding is a standardized approach to identifying animals and plants by minimal sequences of DNA. 1. Why barcode animal and plant species? By harnessing advances in electronics and genetics, barcoding will help many people quickly and cheaply recognize known species and retrieve information about them, and will speed discovery of the millions of species(More)