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Organising and processing information and incorpo-rating data into the statistical program Venezuela When the database of failed transformers was incorporated into SPSS version Table 2 gives descriptive statistics regarding failed transformer data, showing the number of items of data analysed, valid minimum, maximum, mean, standard deviation, variance, mean, median and mode range of values for each item of infor-mation.
The items shown were date of failure occurrence, non-specified equipment failure, capacity, municipality and feed Miller et al. Organising and processing Colombian information and incorporating data into SPSS As with Venezuela, once data regarding failed processors had been incorporated, descriptive statistics were used to present the results shown in Table 3 Mage and Monagasi. Results and Discussion Venezuela 5. Table 4 shows that the peak month for failure was March Figure 1 presents a frequency histogram showing that there was a higher failure rate in March and May.
The data collection instruments provided only an indication that a transformer had burned, without specifying any cause of failure. Figure 2 shows checking the frequency histogram and validating the above. Table 6 shows that Valencia Figure 3 gives a frequency histogram showing greater failure rate in Valencia According to the frequency histogram Figure 4Cardenera 1 had the highest power supply failure rate I8. Table 7 gives a correlation matrix for all variables Miller et al.
Only "municipality" had a greater than 0.
Metodos estadisticos para la investigacion.
This obtained a function based on all information for predicting the cause of transformer failure according to geographical location. Table 9 shows three discriminant functions identifying the failed transformers and Table 10 shows the functions by i group centroid Montgomery and RungerSpiegel et al. Colombia Table 11 shows that May was the peak month for failures Figure 5 gives a frequency histogram showing greater failure rate in May and quite similar rates for April and August.
Table 12 shows the highest fault rate occurred in 5 KVA Figure 6 gives a frequency histogram showing a high 5 kVA trans-former failure rate Table 13 shows that the highest failure rate concerned external circuit shorting Figure 7 shows a histogram describing failure frequency, external short circuits Table 14 shows that was the year of manufacture having the highest failure rate Figure 8 gives a frequency histogram showing that most failures were related to equipment made in Factor and discriminant analysis Table 15 shows the correlation matrix for all variables having coefficients greater than 0.
Table 16 shows this matrix's components. Table 17 shows that three discriminant functions identified a failed transformer. Conclusions Venezuela Regarding factor analysis: Colombia Peak month for occurrence and year of manufacture for failed transformer correlated Transformer capacity and type of failure correlated Regarding discriminant analysis: Three discriminant functions identified failed transformers.
After a listing of plants and uses, Madriz proposes further research, most of which relates to agroforestry and food security; no mention is made about other factors economic, social, political that might be driving change, nor the opinions, aspirations or beliefs of local people. Along these lines, Zaldivar et al. They examine contemporary use of food plants in homegardens from an ecological point of view, calculating diversity indices, community similarities and differences in the presence of food plants, as well as the potential for in situ conservation of genetic diversity.
Metodos estadisticos para la investigacion. (Book, ) [thebluetones.info]
Early secondary growth and older secondary forests and their edges were of minor importance. Koshear gives useful historical and ethnographic information, basic crop production estimates, detailed plant and animal lists, land tenure aspects and issues, as well as an analysis of sustainability and attitudes towards the environment, especially relevant to the current research reported here.
Mostly descriptive in character, this work is relevant for the understanding and analysis of natural resource sustainability, although at that time development and conservation programs had just recently started.
Other researchers including Gordon [ 19 ], Joly et al. Bletzer includes ethnographic information on local healers and illnesses they treat [ 22 ]. Pastrana [ 24 ], Pastrana et al. Another pertinent work is Montero and Corrales' study of non-traditional edible leaves, flowers and stems in Costa Rica [ 27 ]. Despite this rich and wide-ranging research about indigenous communities in Costa Rica, the dynamics of food plants, foodways and their transformations has been neglected.
Therefore, this article seeks to examine such dynamics through an analysis of food plants, their changing role in diets and local explanations for recent changes in their importance. We have set out to answer three main research questions: For the most salient of food plants, what are their ethnobotanical characteristics? Following a description of the methods used, we first describe findings from freelist elicitations supplemented by data from structured and group interviews and inventories concerning the cultural domain of food plants in Conte-Burica as a whole, as well as detailing the ethnobotanical characteristics of those folk species considered most salient.