196,028 research outputs found
Esplorando le risorse naturali dei bambini nella costruzione della struttura moltiplicativa
No full text“Nothing is more practical than a good theory” (Skemp). In this paper we refer to a model of cognitive dynamics originally derived from a wide empirical evidence and now also supported by some neurophenomenological research. We will show how this particular framework constitutes a powerful theoretical tool to plan didactical situations and to interpret cognitive pupils’ behaviours. To show this in detail, we will present and analyze two excerpts of a long term class activity concerning the construction of an algebraic point of view on multiplication in 6/7 aged children
Un progetto di ricerca-azione sulle strutture aritmetiche nella scuola di base
No full textNell'intervento si rende conto di un progetto sperimentale coordinato dalle autrici presso la scuola elementare Madonna Assunta, 73° circolo di Napoli, che ha come oggetto i processi di insegnamento/apprendimento delle strutture elementari dell'aritmetica. Nell'azione di ricerca, iniziata nel 2003/2004, le ricercatrici hanno seguito una classe elementare dalla prima alla quinta, cercando in collaborazione con l'insegnante di creare “dinamiche di comprensione risonante” ed osservarne il funzionamento. Il termine “risonanza” si riferisce qui all'interazione tra i modi di capire individuali e gli strumenti culturali veicolati dalla mediazione didattica. Il presente lavoro ha l'obiettivo di chiarire quali sono i punti di forza della situazione sperimentale (giunta al momento della presentazione al quarto anno dei cinque previsti), e quali punti del percorso didattico sono emersi come “critici” per aver fatto emergere la necessità di un'opera di “mediazione culturale” svolta dagli adulti particolarmente attenta e sensibile alle difficoltà incontrate dai bambini. Nell'intervento si espongono i riferimenti teorici (didattica della matematica, neuroscienze, psicologia), le scelte metodologiche, gli strumenti di analisi adottati, sono descritte alcune attività particolarmente significative per il percorso sperimentale, si traggono parziali conclusioni e vengono delineate future direzioni di ricerca
Exploiting children’s natural resources to build the multiplicative structure
No full text“Nothing is more practical than a good theory” (Skemp). In this paper we refer to a model of cognitive dynamics originally derived from wide empirical evidence and now also supported by some neurophenomenological research. We will show how this
particular framework constitutes a powerful theoretical tool to plan didactical situations and to interpret students’ cognitive behaviors. To show this in detail, we will present and analyze two excerpts of a long term class activity concerning the construction of an
algebraic point of view on multiplication in children aged 6-7
Understanding basic arithmetics by “Resonance” approach: from addition to multiplication in first grade
No full textWe sketchly account for the first year of a teaching experiment (in two first-grade classes) aimed to validate a new approach to the teaching of basic mathematics, at elementary level. Our approach deeply involves children in long term “prototypical” activities where, playing with small numbers, they can seize the basic syntactic and semantic structures underlying a sound “number sense”
Preliminary data about paraoxonase (PON1) in newborn calves : age related variation and comparison between healthy and sick animals
No full textSerum paraoxonase-1 activity in neonatal calves: Age related variations and comparison between healthy and sick animals
No full textEarly detection of inflammation in neonatal calves allows early intervention, which may reduce mortality. Paraoxonase-1 (PON1) is a negative acute phase protein in humans. The aims of this study were to investigate age-related variability in serum PON1 activity and its clinical usefulness in neonatal calves. In healthy calves (n= 9), PON1 activity increased with age from 2 to 21. days of age. There was no significant increase in PON1 activity in healthy calves from days 21 to 120 (n= 15), but PON1 activity was significantly higher in adult cattle (n= 45). In sick calves, serum PON1 was significantly lower in calves 28- to 120-days-old with respiratory disease (n= 8) in comparison with age matched controls (n= 20 and n= 15, respectively). These results support the role of PON1 as a negative acute phase protein in cattle
Preliminary study about paraoxonase activity In canine serum : correlation between crp and paraoxonase acute phase proteins
No full textSerum paraoxonase 1 activity in dogs: preanalytical and analytical factors and correlation with C-reactive protein and alpha-2-globulin
No full textBackground: Serum activity of paraoxonase (PON1) decreases during inflammation in many species. Little information is available on paraoxon-based tests and the possible role of PON1 in dogs. Objectives: The objectives of the study were to validate an automated paraoxon-based assay to measure PON1 activity in canine serum, to determine its stability under different storage conditions, to determine a reference interval (RI) in healthy dogs, and to assess whether PON1 is of comparable diagnostic value as C-reactive protein (CRP) and α2-globulins. Methods: Intra-assay and inter-assay imprecision, linearity under dilution (LUD), interference, and storage artifacts were evaluated. A PON1 RI was determined for healthy dogs, and PON1 activity, sensitivity, and specificity were compared with CRP and α2-globulins. Results: Intra- and inter-assay CVs were below 1.6% and 7.8%, respectively. The LUD test fitted the linear model. PON1 activity measurements were increased after addition of hemolysates and lipids, and after storage for 12 hours at room temperature, 72 hours at 4°C, and 6 months at -20°C. PON1 activity and CRP or α2-globulins did not correlate well. PON1 activity decreased significantly only in dogs with very high CRP concentrations. In contrast to CRP and α2-globulins, PON1 activity was not significantly different between dogs with and without inflammation. Conclusions: The automated paraoxon-based method to assess serum canine PON1 activity was accurate and precise, but it was influenced by hemolysis, lipemia, and standard storage conditions. In this study, contrarily to CRP and α2-globulins, PON1 activity did not provide diagnostic value as a negative acute phase protein in dogs
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States" By M. Carey.
No full text"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States: containing bried sketches of the moral and political character of those states.
By M. Carey, member of the American philosophical, and of the American Antiquarian Society, and author of The Olive Branch, Cindiciae Hibernicae, essays on banking, on political economy, and on internal improvement.
To which are now added the English editor's comments on the subject; together with Important Advice to Emigrants, and Cautions Against Impositions Practiced in the Outports
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