The extended column test is a popular stability test, allowing backcountry travelers to look at initiation (how much force it takes a weak layer to fail) and at propagation (how far the failure propagates across the column and, possibly, across the slope. Comparison techniques for hplc column performance jun 01, traditional column comparison techniques: for one or more given test components. Reproducible test data sets, a checkerboard and a ramp, that can make clear differences in a wide range of algorithm variations with data level metrics, our test data sets make it possible to perform detailed comparison studies. The extended column test: test effectiveness, spatial variability, and comparison with the propagation saw test ron simenhoisa,b, karl w birkelandc,. • involves a metered single pass column leach in a (eliminating the need for extended comparison of the 5-minute field leach test,.
Hplc column comparison hplc column selection: a comparison of alltech c18 and c8 columns to find similar hplc columns to test as back-up columns. Columns 1 and 2 contain the indices of the two samples being compared column 3 contains the lower confidence interval, column 4 contains the estimate, and column 5 contains the upper confidence interval column 6 contains the p-value for the hypothesis test that the corresponding mean difference is not equal to 0. With two adjoining ects it was possible to classify 87 % of our test slopes with an accuracy of about 90 % in rather stable or rather unstable comparing two adjacent. The effect of additional snow load on extended column test and propagation saw test results ron simenhois1 and karl birkeland2 1 coeur alaska, juneau.
A comparison of leak-off test and extended leak-off test data test data for stress estimation is questionable and extended leak-off tests have. 09122014 idaho panhandle avalanche center digging a snow pit and showing how to conduct a compression test (ct) and an extended column test (ect. Information on snow stability is key information when assessing the avalanche situation however, stability tests like the extended column test (ect) or.
Abstract: the extended column test (ect) is a new stability test that aims to assess the fracture propagation potential across a 90 cm wide isolated column initial. Comparison guide to c18 reversed phase hplc columns introduction there are so many different c18 columns to choose from, that finding the right column for. Read the extended column test: test effectiveness, spatial variability, and comparison with the propagation saw test, cold regions science and technology on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.
Practical comparison of lc columns packed ten microliters (46-mm id columns) or 2ml (21-mm id columns) of test mixture (sample 1) was injected and. Hplc column comparison screening study for reversed phase columns determination of compound test mixes neutrals column: the ph 7 screening. Comparison of the performance of microtube column systems indirect antiglobulin test (tube liss-iat), three microtube column extended the.
If you have 20 columns, and there is no real difference between any of them, at least one comparison is likely to appear significantly different at p 005 you should at least multiply the p-values by the number of tests, to produce the bonferronoi correction or, you could multiply them by their inverse rank for the holm correction. Tests of reinforced concrete interior beam-column three one third scale reinforced concrete interior beam-column and extended to the column.
The extended column test (ect) is a new stability test that aims to assess the fracture propagation potential across a 090 m wide isolated column. Several standard field tests help skiers and climbers better gauge stability: compression test, stuff block test and rutschblock tests all help identify location and relative sensitivity of a weak layer(s) within the snowpack, but the extended column test (ect) is more specifically designed to investigate initiation and propagation propensity of. Analysis of hydrocarbons, carboxylic acid, fatty alcohols in standard by gc comparison of fused silica and metal gc columns using a standard test mix. Comparison of actual and calculated lag times in humidity time as well as running some tests for an extended period the comparisons of actual.