Providing feedback on programming assignments is a tedious task for the instructor, and even impossible in large MOOCs with thousands of students. In this paper, we present a novel technique for automatic feedback generation: (1) For a given programming assignment, we automatically cluster the correct student attempts based on their underlying strategy. From each class we select one student att...

Since 2012, the vision of MOOCs in universities has been evolving rapidly. Universities that have decided to place a serious bet for including this kind of courses in their portfolio have involved a diverse set of staff roles within the institution. In most cases, with the exception of fully dedicated staff members hired for the sole purpose of MOOC development, MOOC related tasks are assigned ...

The geographic distribution of life on Earth supports a general pattern of increase in biodiversity with increasing temperature. However, some previous analyses of the 540-million-year Phanerozoic fossil record found a contrary relationship, with paleodiversity declining when the planet warms. These contradictory findings are hard to reconcile theoretically. We analyze marine invertebrate biodi...

An experiment was designed to test whether different individuals produce similar voice patterns when they read the same emotional passage. Quantitative scoring criteria were developed that reflect the extent to which different individuals consistently produce similar constellations of acoustic attributes in response to the same emotional context. The scoring procedure was applied to the voice t...

Massive Open Online Courses (MOOC) are becoming increasingly difficult to ignore in online education. Recent developments in MOOC have heightened the need for understanding the MOOC. The issue of an in-depth understanding of the MOOC setting has been a key subject within the field of qualitative research. However, far too little attention has been paid to the MOOC setting. This paper seeks to p...

Cities in North America have been building bicycle infrastructure, in particular cycle tracks, with the intention of promoting urban cycling and improving cyclist safety. These facilities have been built and expanded but very little research has been done to investigate the safety impacts of cycle tracks, in particular at intersections, where cyclists interact with turning motor-vehicles. Some ...

This editorial tracks progress from informal conversations in 2001 to the fifth anniversary publication of the International Journal of Therapeutic Massage and Bodywork: Research Education and Practice, the only open-source, peer-reviewed journal specifically dedicated to the scientific exploration of therapeutic massage practice and education.

Flexibility of the myosin molecule was studied by an in vitro motility assay in terms of the direction of actin movement. Actin filaments can move in both directions on tracks of heavy meromyosin made on a nitrocellulose surface, and, furthermore, along the native thick filaments passing over their central bare zone. These observations indicate that the myosin molecule has a considerable flexib...

This article analyzes patterns of geographic migration of black and white American families over four consecutive generations. The analysis is based on a unique set of questions in the Panel Study of Income Dynamics (PSID) asking respondents about the counties and states in which their parents and grandparents were raised. Using this information along with the extensive geographic information a...

Abstract This paper tracks distributional changes over the last quarter of the twentieth century. We focus on three conceptually distinct distributions: the distribution of wages, the distribution of annual earnings and the distribution of total family income adjusted for family size. We show that all three distributions became less equal during the last half of the 1970’s and the 1980’s. This ...