172 research outputs found

    Tracing the building of Robert's connections in mathematical problem solving: a sixteen-year study

    No full text
    This research analyzes how external representations created by a student, Robert, helped him in building mathematical understanding over a sixteen-year period. Robert (also known as Bobby), was an original participant of the Rutgers longitudinal study where students were encouraged to work on problem-solving tasks with minimum intervention (Maher, 2005). The research demonstrates how Robert built robust counting techniques by tracing the evolvement of his problem-solving heuristics, strategies, justifications and external representations. The study also examines how Robert made connections to his earlier problem solving. In addition, the origins of Robert’s ideas related to Pascal’s Triangle and Pascal’s Pyramid are investigated. Fifteen sessions were selected between Robert’s fifth grade (February 26, 1993) and post-graduate interviews (March 27, 2009) yielding more than twenty hours of video data. Powell, Francisco, and Maher (2003) model was used for analysis where by each session was viewed, transcribed and coded for critical events to create a comprehensive narrative. The study reveals that mature combinatorial techniques were a part of Robert’s counting strategies as early as middle school. Robert used binary notation to count two-colored candle arrangements and later to count the number of ways a team could win a World Series; modified exponential formulae to account for combinations for a garage door opener, arrangements for n-colored candles and n-toppings pizzas; discovered the combinations formula, C(n, 2), in his eleventh grade; and connected these solutions to Pascal’s identities. In general, Robert looked for patterns in his solutions; generalized the findings; and identified structural similarities in tasks presented to him as he connected three-position garage door opener to three-colored candles arrangements, pizza with four toppings to towers four high, and directions on Pascal’s Triangle to routes for a taxi on a two-dimensional grid. External representations created by Robert served as communication tools for him and provided insight into his problem solving heuristics and mathematical understanding. The research contributes to the growing body of case studies from Rutgers longitudinal study providing evidence that building of early mathematical ideas is the foundation of more advanced learning (Davis & Maher, 1997).Ph.D.Includes bibliographical referencesIncludes vitaby Anoop Ahluwali

    Third Revision of the Global Surface Seawater Dimethyl Sulfide Climatology (DMS-Rev3)

    No full text
    This dataset contains all the input data and the Matlab codes for the Third Revision of the Global Surface Seawater Dimethyl Sulphide Climatology (DMS-Rev3) Shrivardhan Hulswar, Rafel Simo, Martí Galí, Thomas G. Bell, Arancha Lana, Swaleha Inamdar, Paul R. Halloran, George Manville and Anoop S. Mahajan *corresponding author: Anoop Sharad Mahajan ([email protected]) Details to run the code can be found in the word file: Code details.doc

    Third Revision of the Global Surface Seawater Dimethyl Sulfide Climatology (DMS-Rev3)

    No full text
    This dataset contains all the input data and the Matlab codes for the Third Revision of the Global Surface Seawater Dimethyl Sulphide Climatology (DMS-Rev3)Shrivardhan Hulswar, Rafel Simo, Martí Galí, Thomas G. Bell, Arancha Lana, Swaleha Inamdar, Paul R. Halloran, George Manville and Anoop S. Mahajan*corresponding author: Anoop Sharad Mahajan ([email protected])Details to run the code can be found in the word file: Code details.docxTHIS DATASET IS ARCHIVED AT DANS/EASY, BUT NOT ACCESSIBLE HERE. TO VIEW A LIST OF FILES AND ACCESS THE FILES IN THIS DATASET CLICK ON THE DOI-LINK ABOV

    Advanced Cardiac Resynchronisation Therapy

    No full text

    Outsourcing and Off-shoring: Options for the US Construction Industry

    No full text
    The construction industry relies on the skills of structural engineers for all projects. There exists a large volume of design and detailing work for structural engineering in the United States (US) and there are insufficient numbers of qualified designers in the US to do the work. Recent changes in the telecommunications sector make off-shoring structural design work to developing countries like India and China a realistic possibility. Economics of outsourcing is a key reason for this possibility to be realized. It is logical to consider the effects of outsourcing in the design sector and its effects on the construction industry. The manuscript will present the author’s finding based on detailed case-study model research with two companies that are outsourcing work to India from the US. The author conducted detailed interviews with principals in US structural design firms and then traveled to Bangalore, India to interview their Indian counterparts. Results from these interviews are presented. The author will present an empirical model for outsourcing construction activities. Processes in the construction industry that are most suited for outsourcing and off-shoring are presented. Issues surrounding outsourcing such as training, economics and logistics are discussed. In the past decade outsourcing and off-shoring have become prevalent practices in many industries. White colla

    Book Reviews

    No full text
    Book 1Book Title: Shared care for asthmaBook Authors:  Mark Levy, Jon Couriel, Roland Clark, Stephen Holgate, & Anoop ChauhanPp. x + 219. Illustrated. R340. ISlS Medical Media. 1997. ISBN 1-899066-41-1.Book 2Book Title: Proceedings of the 8th world congress on painBook Authors: Troels S. Jensen, Judith A. Turner & Zsuzsanna Wiesenfeld-HallinPp. xvi + 965. $75. IASP Press. 1997. ISBN 0-931092-18-3.Book 3Book Title: Western medicine: an illustrated historyBook Author: Irvine Loudon (Ed.)Pp. xvi + 347. Illustrated. R282. Oxford University Press. 1997. ISBN 0-19-820509-0
    corecore