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| Zúñiga,Janneth. |
| The panoramic radiograph constitutes the "gold standard" for any clinical evaluation in dentistry. It has been universally accepted that it has a global distortion of 25 % due to magnification. The present study was carried out to determine more precise percentages of distortion, and to find out whether the distortion was due to magnification or minimization. Thirty skulls with their mandibles were divided by two horizontal and four vertical planes in ten quadrants. Wires of different lengths were fixed in each of these quadrants. A panoramic radiograph was taken for each skull. The lengths of the wires measured in the images (distorted value) were compared to the actual lengths of the wires (real value). The concordance correlation coefficient was... |
| Tipo: Journal article |
Palavras-chave: Panoramic radiograph; Orthopantomograph; Distortion. |
| Ano: 2017 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022017000100043 |
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| Beghin, John C.; Diop, Ndiame; Matthey, Holger; Sewadeh, Mirvat. |
| We use a new partial-equilibrium, multi-market international model to analyze trade and agricultural policies affecting markets for peanut/groundnut products. The model covers four goods in thirteen countries/regions, including a large set of developing countries. Welfare is evaluated by looking at consumers' equivalent variation, quasi-profits in farming, quasi-profits in crushing, and taxpayers' revenues and outlays implied by distortions. We calibrate the model on recent historical data and current policy information. We analyze several groundnut trade liberalization scenarios in deviation from the recent historical baseline. Trade liberalization in groundnut markets has a strong South-South dimension, opposing India and, to a lesser extent, China to... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Distortion; Doha; Groundnuts; Negotiations; Oil; Peanut; Protection; Trade liberalization; Crop Production/Industries; International Relations/Trade. |
| Ano: 2003 |
URL: http://purl.umn.edu/18329 |
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