The Twitter network of two academic libraries was analyzed to determine the influential accounts that connect to them. Such information can be exploited by libraries to create tailored social media outreach and information dissemination programs. Three network metrics, measuring different definitions of importance, were calculated for each account in the network. This allowed for the quantification and ranking of the accounts by influence/ importance, normally considered to be qualitative and subjective. By all measures, accounts associated with the institutions, and not faculty, staff, or students, were found to be the most influential players in the networks of both libraries, suggesting that this is a general feature of academic library Twitter networks. Furthermore, the library, as an institutional account itself, is also influential to the broader Twitter community of its home institution. This demonstrates that the library is in a key position to propagate information from sister accounts at the institution.

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Studies of trauma commonly concentrate on the psychological and physiological effects of recent violent events. Although today connections are becoming more explicitly drawn, early studies of the aftermath of amputation serve to shed light on modern understanding of the interaction of the physical and emotional. The study of combat amputation, dissociation, and related posttraumatic stress largely began with the work of 19th-century Philadelphia physician Silas Weir Mitchell, who brought attention to the phenomenon of phantom limb pain. Less known, however, are the data he and his son, John K. Mitchell, also collected on the mental outcomes of trauma. Using an archived collection of original surveys of double-amputee patients dating largely from 1893 housed at the Historical Medical Library at the College of Physicians of Philadelphia, an interdisciplinary team explored the historical, anthropological, and psychological background of the study of combat trauma. Almost 30 years following the end of hostilities, the majority of the sample of U.S. Civil War veterans indicated that their general disposition, general health, and sleeping or eating patterns had changed following limb amputation. More telling, possibly, are the written comments on the surveys and letters that indicate frustration with the continuous suffering and the knowledge of their mental and physical changes. These data illustrate the value of historical archives in documenting the development of the study of trauma and modern concepts of combat experiences.