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Ascent, Descent, and Divergence: Darwin and Haeckel on the Human Family Tree
Get PDFIn their pathbreaking discussions of the human family tree in the 1860s and 1870s, Ernst Haeckel and Charles Darwin had to account for both the ascent of the species and its diversification into races. But what was the cause and the pattern of diversification, and when did it begin? Did we attain a common humanity first, which all the races still share? Or did we split up as apes and have to find our own separate and perhaps not equivalent ways to become human? Using texts and images from their principal works, this essay recovers Haeckel’s and Darwin’s views on these points, relates them to the monogenist-polygenist debate, and compares them to Alfred Russel Wallace’s 1864 attempt at a compromise
TRANSIMS Implementation for a Small Network and Comparison with Enhanced Four-Step Model
Get PDFTravel demand forecasting is a major tool to assist decision makers in transportation planning. While the conventional four-step trip-based approach is the dominant method to perform travel demand analysis, behavioral advances have been made in the past decade. This paper proposes and applies an enhancemnt to the four-step travel demand analysis model called Sub-TAZ. Furthermore, as an initial step toward activity-based models, a TRANSIMS Track-1 approach is implemented utilizing a detailed network developed in Sub-TAZ approach. The conventional four-step, Sub-TAZ, and TRANSIMS models were estimated in a small case study for Fort Meade, Maryland, with zonal trip tables. The models were calibrated and validated for the base year (2005), and the forecasted results for the year (2010) were compared to actual ground counts of traffic volume and speed. The study evaluated the forecasting ability of TRANSIMS versus the conventional and enhanced four-step models and provided critical observations concerning strategies for the further implementation of TRANSIMS.BACKGROUND Traffic pattern prediction is necessary for infrastructure improvement, and travel demand modeling provides tools to forecast travel patterns under various conditions. This modeling involves a series of mathematical equations that represent how people make travel choices. Traditional travel demand models use the four-step method, which was introduced in the 1950s and has been used widely in transportation planning. Although the four-step method has been practical in producing aggregate forecasts, it has some shortcomings. For example, in short-range planning networks, existing and newly constructed roads become congested much faster than forecasted (TRB 2007) and the performance of current four-step models is not always satisfactory. Additionally, these models are not behavioral in nature and as a result they are unable to represent the time chosen for travel, travelers’ responses to demand policies (e.g., toll roads, road pricing, and transit vouchers), non-motorize
From the Past (1854): A Chapter on Necklaces, Old and New
Get PDFOriginally published in Godey's Magazine and Lady's Book in 1854 (pp. 213-216), this article presents a brief history of necklaces among the classic Egyptians, Greeks, and Romans, as well as the British, from the perspective of an educated English lady. It is an instructive early study of strung adornments based on antiquarian, historical, and literary sources
Oregon's Statewide Database Licensing Advisory Committee Tries New Approach to Support Oregon Libraries
Get PDFSelect Bibliography
Get PDFBibliography of reading material for those interested in pursuing the ideas discussed in this volume of Konturen, Defining the Human and the Animal
