How central are clients in sexual networks created by commercial sex?

Sex workers are traditionally considered important vectors of transmission of sexually transmitted infections (STI). The role of clients is commonly overlooked, partially due to the lack of evidence on clients' position in the sexual network created by commercial sex. Contrasting the diffusion importance of sex workers and their clients in the map of their sexual encounters in two Web-mediated communities, we find that from diffusion perspective, clients are as important as sex workers. Their diffusion importance is closely linked to the geography of the sexual encounters: as a result of different movement patterns, travelling clients shorten network distances between distant network neighborhoods and thus facilitate contagion among them more than sex workers, and find themselves more often in the core of the network by which they could contribute to the persistence of STIs in the community. These findings position clients into the set of the key actors and highlight the role of human mobility in the transmission of STIs in commercial sexual networks.

Civic Discipline: Geography in America, 1860-1890

Civic Discipline argues that the story of the origins of American geography is a distinctly "New York story." Wealthy businessmen began America's first geographical society - the American Geographical Society - in 1851, inspired by what geographical knowledge of the globe could offer an expanding American commercial Empire at home and abroad. AGS meetings were spectacularly popular among the public and press. At them, geography was cast as a science in the service of the public and civic good. Meanwhile though, AGS men's spatial and financial "missions" became closely linked. They helped improve derelict spaces in New York City and weighed in on controversial scientific questions of the day in the Arctic, yet the geographical knowledge they advanced - such as in the American West and in Central Africa - also created enormous personal wealth. Civic Discipline shows that it was not just that historical events shaped geography, but rather, that geography shaped historical events.

An account of travels into the interior of southern Africa, in the years 1797 and 1798 : including cursory observations on the geology and geography of the southern part of that continent ; the natural history of such objects as occurred in the animal, vegetable, and mineral kingdoms ; and sketches of the physical and moral characters of the various tribes of inhabitants surrounding the settlement of the Cape of Good Hope. To which is annexed, a description of the present state, population, and produce of that extensive colony ; with a map constructed entirely from actual observations made in the course of the travels.

Vol. 2 has title: An account of travels into the interior of Southern Africa; in which is considered, the importance of the Cape of Good Hope to the different European powers, as a naval and military station ; as a territorial acquisition and commercial emporium in time of peace : with a statistical sketch of the whole colony ; comp. from authentic documents.

A new geographical, historical, and commercial grammar; and present state of the several kingdoms of the world ...

Issued also under titles: A system of modern geography, A new system of modern geography, and A universal geography.

Commercial structure and commercial blight : retail patterns and processes in the city of Chicago / assisted by Robert J. Tennant, Barry T. Garner, James W. Simmons.

"A study made under contract with the Community Renewal Program of the city of Chicago."

Chicago commercial reference handbook : statistical supplement to Commercial structure and commercial blight /

"A study made under contract with the Community Renewal Program of the city of Chicago."