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Alternative Activities (alternative + activity)

Distribution by Scientific Domains
Humanities and Social Sciences50%

Selected Abstracts

Alternatives to Mechanical Drills for the Early Stages of Language Practice in Foreign Language Textbooks

FOREIGN LANGUAGE ANNALS, Issue 3 2005
Article first published online: 31 DEC 200, Janice M. Aski
Abstract: There is a growing body of research indicating that mechanical drills do not facilitate the development of explicit or implicit knowledge. This study identifies the inadequate aspects of mechanical drills and offers alternative activities for the early stages of language practice, whose formats and features comply with recent research in the learning and acquisition of foreign languages. Wong and VanPatten's (2003) referential structured input activities are suggested as substitutes to practice grammatical features that contribute meaningfully to the utterance. However, for allophonic or allomorphic alternations that are governed by the phonetic, stress, or grammatical context and that do not convey meaning, a new type of activity (form-form activities) is introduced, which promotes noticing by directing learners to actively operationalize their understanding of grammatical rules. Production activities for the later stages of practice are briefly discussed, and this study concludes with advice for instructors regarding their expectations of students' performance. [source]

Children's Perceptions of TV and Health Behavior Effects

JOURNAL OF NURSING SCHOLARSHIP, Issue 3 2002
Christine M. Kennedy
Purpose: To understand and document children's stated experiences and beliefs about television and to elicit their suggestions for alternative activities. Design and Methods: Eleven focus groups were conducted with 51 Anglo and Latino children, ages 7,10, in a large Northern California city. Philosophical underpinnings of developmental psychology were the basis for multiphase thematic analysis. Data were collected in 1998,1999. Results: Themes were identified in five conceptual categories. Findings showed that children did not perceive many parental rules related to TV watching, rather daily routines are associated with TV viewing. Children revealed both covert and overt motivations for watching. Nearly all participants spoke of the deception of advertising, but they were unclear about the role of commercial sponsors in payment for TV shows. Children perceived both negative physical and behavioral health effects of TV and they had great difficulty imagining life without a TV. Conclusions: Children perceived television as providing educational and relational needs. Although they preferred alternatives to TV, they had difficulty articulating and getting those needs met. Clinicians and researchers can utilize these findings to design health interventions that attenuate the health-impairing effects of habitual sedentary activity in childhood. [source]

Practical assessment of project performance: the ,potential impact' approach,

PUBLIC ADMINISTRATION & DEVELOPMENT, Issue 5 2000
Michael Hubbard
This article sets out an approach to assessing project performance, using ,potential impact' of the project. Its purpose is to assist project design and evaluation. In project design, potential impacts of alternative activities on the project objective are compared, in order to select activities with the greatest impact. In project evaluation, potential and actual impacts of a project are compared. Additional benefits of the approach are that it indicates ,value for money' of development assistance invested in projects, and easier tracing of reasons for underachievement in projects to weaknesses in their design or management. Limitations are that it relies on informed judgement of the planners or evaluators and the categories for rating performance may unavoidably be broad. It complements the logical framework approach by providing a practical design and evaluation tool. Copyright © 2000 John Wiley & Sons, Ltd. [source]

Mapping the Limits of Substrate Specificity of the Adenylation Domain of TycA

CHEMBIOCHEM, Issue 4 2009
Benoit R. M. Villiers
Abstract The limits and potential of substrate promiscuity of the adenylation domain of tyrocidine synthetase 1 were systematically explored. Substrate acceptance is governed by hydrophobic effects (as shown by the correlation of kcat/KM and side-chain log,P), shape complementarity and steric exclusion. The quantification of these factors provides ground rules for understanding and possibly evolving substrate specificity in this class of enzymes. The catalytic potential of tyrocidine synthetase 1 (TycA) was probed by the kinetic characterization of its adenylation activity. We observed reactions with 30 substrates, thus suggesting some substrate promiscuity. However, although the TycA adenylation (A) domain was able to accommodate alternative substrates, their kcat/KM values ranged over six orders of magnitude. A comparison of the activities allowed the systematic mapping of the substrate specificity determinants of the TycA A-domain. Hydrophobicity plays a major role in the recognition of substrate analogues but can be combined with shape complementarity, conferring higher activity, and/or steric exclusion, leading to substantial discrimination against larger substrates. A comparison of the kcat/KM values of the TycA A-domain and phenylalanyl-tRNA synthetase showed that the level of discrimination was comparable in the two enzymes for the adenylation reaction and suggested that TycA was also subjected to high selective pressure. The specificity patterns observed and the quantification of alternative activities provide a basis for exploring possible paths for the future directed evolution of A-domain specificity. [source]