Over the past half-century video games have become a significant part of our cultural environment, in part, by leading advances in both technology and artistic innovation. In recent years librarians and researchers have recognized these games as cultural objects that require collection and curation. Developing and maintaining collections of this fast moving and somewhat ephemeral media, however, poses challenges due to constantly advancing technology and a corresponding lack of consistent terminology. This article addresses the literature and critical issues surrounding collections of video games within libraries and presents a case study of the University of Michigan’s Computer and Video Game Archive (CVGA), one of the largest academic archives of its kind. Moreover, video games are situated in a humanistic approach to the field of game studies as the article draws on the relevance of methods from art history and film studies.

We thank Neal Beck for his comments. In general, there is little difference in our theoretical and practical positions. We all agree that in some applications, time dummies can be problematic; controlling for temporal dependence is important for less-biased estimation of the coefficients on our substantive regressors; a smoothed function of time (whether via a cubic polynomial or spline) is a useful way to model temporal dependence in grouped binary data; and viewing the graph of the hazard can be informative.

Since Beck, Katz, and Tucker (1998), the standard method for modeling time dependence in binary data has been to incorporate time dummies or splined time in logistic regressions. Although we agree with the need for modeling time dependence, we demonstrate that time dummies can induce estimation problems due to separation. Splines do not suffer from these problems. However, the complexity of splines has led substantive researchers (1) to use knot values that may be inappropriate for their data and (2) to ignore any substantive discussion concerning temporal dependence. We propose a relatively simple alternative: including t, t 2, and t 3 in the regression. This cubic polynomial approximation is trivial to implement—and, therefore, interpret—and it avoids problems such as quasi-complete separation. Monte Carlo analysis demonstrates that, for the types of hazards one often sees in substantive research, the polynomial approximation always outperforms time dummies and generally performs as well as splines or even more flexible autosmoothing procedures. Due to its simplicity, this method also accommodates nonproportional hazards in a straightforward way. We reanalyze Crowley and Skocpol (2001) using nonproportional hazards and find new empirical support for the historical-institutionalist perspective.

The formal commissioning of the IRWG occurred at the 1991 Buenos Aires General Assembly, following a Joint Commission meeting at the IAU GA in Baltimore in 1988 that identified the problems with ground-based infrared photometry. The meeting justification, papers, and conclusions, can be found in Milone (1989). In summary, the challenges involved how to explain the failure to achieve the milli-magnitude precision expected of infrared photometry and an apparent 3% limit on system transformability. The proposed solution was to redefine the broadband Johnson system, the passbands of which had proven so unsatisfactory that over time effectively different systems proliferated, although bearing the same “JHKLMNQ” designations; the new system needed to be better positioned and centered in the spectral windows of the Earth's atmosphere, and the variable water vapour content of the atmosphere needed to be measured in real time to better correct for atmospheric extinction.

Positronium annihilation lifetime spectroscopy (PALS) using a positron beam is a proven technique to characterize porosity in amorphous thin film materials. The capability to control the depth of the implanted positrons is unique to beams as compared to traditional bulk PALS techniques. By increasing the positron beam energy, positrons are implanted deeper into the film. Control of the positron implantation depth in beam-PALS allows analysis of sub- micron films, investigation of depth-dependent film inhomogeneities, determination of pore interconnection lengths, and access to buried films under barrier layers. Details on PALS depth profiling and an example of applying the technique to a plasma-enhanced-chemical-vapor- deposited (PECVD) porous film are presented.

This study examined social-emotional functioning in children with Gilles de la Tourette's syndrome (TS) alone and children with TS and Attention Deficit Hyperactivity Disorder (ADHD). In addition, the contribution of family functioning to social competence was examined. Children with a clinical diagnosis of TS were recruited from the Yale Child Study Center TS specialty clinic. Unaffected control children were recruited through newspaper advertisements and announcements within the university and at area schools. The final sample consisted of 72 children (45 boys and 27 girls) between the ages of 8 and 14. Sixteen children met DMS-III-R criteria for TS, 33 children met criteria for TS and ADHD, and 23 children had no psychiatric diagnoses. Children with TS and ADHD evidenced more externalizing and internalizing behavior problems and poorer social adaptation than children with TS only or unaffected controls. Children with TS only were not significantly different from unaffected controls on most measures of externalizing behaviors and social adaptation but did exhibit more internalizing symptoms. Tic symptom severity was not associated with social, behavioral, or emotional functioning among children with TS, even after stratifying by medication status. However, ADHD diagnosis, obsessional symptom severity, and family functioning were significantly associated with social and emotional adjustment among TS children. Moreover, family functioning was associated with social and emotional adjustment even after controlling for TS and ADHD diagnostic status. These findings demonstrate that much of the social and behavioral dysfunction in children with TS is ADHD-specific and children with TS alone have a very different social-emotional profile than do those with TS plus ADHD. Finally, social-emotional adjustment in children with TS is best understood within the family context.