Leaded Aviation Fuel May Present Long-Term Effects on Campus Life from the Adjacent Albert Whitted Airport

Propeller planes and small engine aircraft around the United States, legally utilize leaded aviation gasoline. The purpose of this experiment was to collect suspended particulate matter from a university campus, directly below an airport’s arriving flight path’s descent line, and to analyze lead content suspended in the air. Two collection sets of three separate samples were collected on six separate days, one set in July of 2018 and the second set in January 2019.

Leaded Aviation Fuel May Present Long-Term Effects on Campus Life from the Adjacent Albert Whitted Airport

Propeller planes and small engine aircraft around the United States, legally utilize leaded aviation gasoline. The purpose of this experiment was to collect suspended particulate matter from a university campus, directly below an airport’s arriving flight path’s descent line, and to analyze lead content suspended in the air. Two collection sets of three separate samples were collected on six separate days, one set in July of 2018 and the second set in January 2019.

Asymmetric Caregiving by Grandparents, Aunts, and Uncles and the Theories of Kin Selection and Paternity Certainty: How Does Evolution Explain Human Behavior Toward Close Relatives?

Evolutionary theories explain altruism between related individuals, not only for nonhuman animals but also humans themselves. In sociobiology and evolutionary psychology, the supposedly universally found stronger matrilineal kin caregiving by grandparents, aunts, and uncles is often explained by paternity uncertainty in the male descent line. The present article provides an overview of theories and results of the evolutionary research. I will focus, in particular, on the universal caregiving pattern as well as on cultural variety in kin caregiving, the role of actual paternity certainty in the society, theoretical inconsistencies, and nonconsanguineous step relationships. From the analysis of the empirical data, I will conclude that the paternity certainty hypothesis is in fact not a very suitable explanation for the asymmetric kin caregiving found in humans. I will discuss how human behavior toward relatives, in particular grandchildren, can be alternatively explained from an evolutionary perspective.

STELES AND STATUS: EVIDENCE FOR THE EMERGENCE OF A NEW ELITE IN YUAN NORTH CHINA

Drawing on stele inscriptions in a Yuan-period ancestral graveyard, this article aims to shed light on the emergence and evolution of a Chinese office-holding family in North China under Mongol rule (thirteenth- to fourteenth century). Tracing the family's connections with Mongols, it argues that adaptation to the Mongolian patronage system was essential to obtaining and maintaining political status during the Yuan, and that the kin group was stratified with the patronized descent line monopolizing political privilege. In doing so, the article highlights the value of stone inscriptions in clarifying official status, patronage, and inheritance rights in North China during the Yuan period.