Learn More
Hall's condition is a well-known necessary condition for the existence of a proper coloring of a graph from prescribed lists. Completing a partial latin square is a very special kind of graph list-coloring problem. Crop-per's question was: is Hall's condition sufficient for the existence of a completion of a partial latin square? The folk belief that the(More)
Many college students and their families are concerned about the high costs of textbooks. E–books have been proposed as one potential solution; open source textbooks have also been explored. A company called Flat World Knowledge produces and gives away open source textbooks in a way they believe to be financially sustainable. This article reports an initial(More)
IMPORTANCE Eye and vision disease burden should help guide ophthalmologic research prioritization. The Global Burden of Disease (GBD) Study 2010 compiled data from 1990 to 2010 on 291 diseases and injuries, 1160 disease and injury sequelae, and 67 risk factors in 187 countries. The Cochrane Database of Systematic Reviews (CDSR) is a resource for systematic(More)
A multi-institutional study of the impact of open textbook adoption on the learning outcomes of post-secondary students" (2015). Abstract In some educational settings, the cost of textbooks approaches or even exceeds the cost of tuition. Given limited resources, it is important to better understand the impacts of free open educational resources (OER) on(More)
Proponents of open educational resources (OER) claim that significant cost savings are possible when open textbooks displace traditional textbooks in the college classroom. We investigated student and faculty perceptions of OER used in a community college context. Over 125 students and 11 faculty from seven colleges responded to an online questionnaire(More)
BACKGROUND Systematic reviews of high-quality evidence are used to inform policy and practice. To improve community health, the production of such reviews should align with burden of disease. This study aims to assess if the volume of research output from systematic reviews proportionally aligns with burden of disease assessed using percentages of mortality(More)
With increasing frequency, authors are licensing their works in such a way so as to permit others to create derivative works. In some cases, these derivatives extend the impact of a work by providing a translation into another language or modifying the file format to make it more accessible. The Internet is increasing the ability of individuals to create(More)
A multi-institutional study of the impact of open textbook adoption on the learning outcomes of post-secondary students Abstract In some educational settings, the cost of textbooks approaches or even exceeds the cost of tuition. Given limited resources, it is important to better understand the impacts of free open educational resources (OER) on student(More)