This paper explores the use of Engle and Conant’s (2002) theoretical framework of productive disciplinary engagement to describe a group of fifth-graders’ emergent dialogical argumentation about a rocky seashore ecosystem that was triggered by fieldwork activities. Engle and Conant’s theoretical framework was mapped onto Weinberger and Fischer’s (2006) multi-dimensional conceptual framework for...

Research and Scholarly Activities Task Force to address the research needs of the university. The task force was composed of faculty members from several departments to ensure broadbased consensus regarding the needs for research development at the university. The chairman of the task force was chosen because he was a champion of research and because of his ability to develop group consensus—he...

In this article, the author argues against the assertion, originating with “canonical” game studies texts such as Homo Ludens and Man, Play, and Games, that inherent in the definition of games is that they are “unproductive.” Instead, she makes a case for the notion of productive play, in which creative production for its own sake (as opposed to production for hire) is an active and integral pa...

This paper explores the e ects of rainwater harvesting (RWH) on aggregate household labor supply in areas prone to droughts. Using a Brazilian survey on rainwater harvesting, we nd that having a RWH infrastructure at the homestead increases household wellbeing through three channels: (i) a direct time allocation e ect since households spend less time fetching water from distant sources, the tim...

The research on entrepreneurship as an economic phenomenon often assumes its desirability as a driver of economic development and growth. However, entrepreneurial talent can be allocated among productive, unproductive and destructive activities. This allocation has important implications in the developing world, particularly for countries hosting conflict or recovering from conflict. The alloca...

The passage of the baby-boom generation into old age raises the prospect of intense pressures on public programs benefiting the elderly, limiting any contemplated expansion of programs serving those needing sustained personal care. This necessitates consideration of comparative efficiency of alternative resources for elder care. I focus on two distinct aspects of such efficiency: productive--...

Previous research, notably Baumol (1990), has highlighted the role of institutions in channeling entrepreneurial supply into productive, unproductive or destructive activities. However, entrepreneurship is not only influenced by institutions— entrepreneurs often help shape institutions themselves. The bilateral causal relation between entrepreneurs and institutions is examined in this paper. En...

This research investigates how students in higher education engage with mobile devices when learning languages. The research addresses the following questions: What productive language learning activities evolve on mobile devices and how are they situated in students’ learning environments? How do students’ learning strategies contribute to mobile language learning? The study is based on questi...

Inhibitory activities of 1-deoxynojirimycin and gluconolactone on Aspergillus niger glucoamylase were studied in relation to the subsite structure of the enzyme. Although both of these inhibitors are considered to bind at subsite 1 of the enzyme active site, 1-deoxynojirimycin showed competitive type inhibition but gluconolactone was a mixed type (or noncompetitive type) inhibitor for the hydro...

Abstract. Pushed by the need of enlarging productive systems, the use of open distributed automation concept is spreading in industry. In distributed systems, some activities, such as the network data transmission may be seen as a succession of discrete states and instantaneous events. In this case, Petri Nets may be used to model this kind of system because it is known as a powerful tool used ...