Towards mining sequences and dispersion of rhetorical moves in student written texts

© 2017 ACM. There is an increasing interest in the analysis of both student's writing and the temporal aspects of learning data. The analysis of higher-level learning features in writing contexts requires analyses of data that could be characterised in terms of the sequences and processes of textual features present. This paper (1) discusses the extant literature on sequential and process analyses of writing; and, based on this and our own first-hand experience on sequential analysis, (2) proposes a number of approaches to both pre-process and analyse sequences in whole-texts. We illustrate how the approaches could be applied to examples drawn from our own datasets of 'rhetorical moves' in written texts, and the potential each approach holds for providing insight into that data. Work is in progress to apply this model to provide empirical insights. Although, similar sequence or process mining techniques have not yet been applied to student writing, techniques applied to event data could readily be operationalised to undercover patterns in texts

Non-conventional P sources for zebu cows in Brazil Fontes não convencionais de fósforo para gado zebu no Brasil

To evaluate non-conventional phosphorus sources, a group of 400 Nellore cows mantained under pasture received a mineral mixture with different P sources (group I: superphosphate - 500 ppm P; group II: superphosphate - 340 ppm P plus rock phosphate Patos 160 ppm P; group III: superphosphate 340 ppm P plus dicalcium phosphate 160 ppm P; group IV - dicalcium phosphate 500 ppm P). There were no differences in pregnancy rate, calving rate and calving interval. A fluorine deposition in bone was observed for the treatments with superphosphate and rock phosphate (66.92 &plusmn; 15.53; 69.97 &plusmn; 6.5 and 64.05 &plusmn; 3.35% respectively for group I, II and III). Superphosphate was almost as good dicalcium phosphate to provide phosphorus for grazing cows and there was a potentially significant economic advantage over dicalcium phosphate.<br>Quatrocentas vacas Nelore, mantidas em pastagem, receberam mistura mineral contendo fontes não convencionais de fósforo (grupo I - 500 ppm P-superfosfato triplo; grupo II - 340 ppm P como superfosfato e 160 ppm P como rocha Patos; grupo III - 340 ppm P como superfosfato e 160 ppm P como fosfato bicálcico; grupo IV -500 ppm P como fosfato bicálcico). Não se verificou diferenças na taxa de prenhez, porcentagem de nascimento e intervalo entre partos. Observou-se que houve maior concentração de flúor nos ossos para o tratamento com fosfato de rocha. O superfosfato triplo apresentou-se como fonte adequada de P e mostrou vantagem econômica em relação ao bicálcico