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Questions related to Instruments
Does anyone have experience with off-the-shelf pneumatic drives that can impart a standard fluorescence or CD spectroscope with stopped-flow capabilities i.e. ability to measure fast kinetics. Are...
01 September 2021 4,824 1 View
I am trying to cluster 3d objects based on their images and according to their level of detail. The main struggle i face is clustering with this high number of dimenssions. I tried the use of PCA...
30 August 2021 5,584 5 View
I see some papers that use IV-2SLS and use lagged dependent variables as instruments. However when the regressions are ran for different countries they use different lags for each country. E.g....
28 August 2021 5,589 2 View
Good day! After reviewing much literature, I've narrowed my statistical tests to Spearman's rho versus Pearson's. I am conducting a quantitative study utilizing three instruments, all with 7-item...
27 August 2021 541 3 View
The aim is to characterize a DAS instrument connected to a fiber optic cable. what are the properties that I should look into ? white noise ? Dynamic range? SNR ? I did some choc tests and I'm...
22 August 2021 5,673 1 View
Please, share any links or papers that can help me know more about the ways to calibrate the instrument and how regularly the calibration must be done. Thank You for the help.
21 August 2021 4,825 3 View
In our fluorescence instrument, if I select Scan mode as Synchronous then it asks to give Emission wavelength ( EM WL), Excitation start wevelength (EX start WL) and Excitation end wavelength (EX...
19 August 2021 2,474 1 View
Dear sir I have a data set on 5 point likert scale having four independent variables(x1,x2,x3,x4) and one dependent variable(y).Each independent variable consists of 8 questions ie 8X4=32...
18 August 2021 2,181 3 View
I usually do 5 measurements with 10 acquisitions each time to get size distributions for a sample. However, I am curious about the intrinsic resolution of the instrument (I use a Wyatt DyanaPro...
12 August 2021 6,495 3 View
I am currently working on a project using abaqus direct cyclic and facing few issues. The stabilized cycle response which is expected after few no of cycles is being shown as output at step time =...
11 August 2021 8,370 3 View
Hello every one. I am PhD candidate in finance. I using this command in stata. The sample is compose by N = 88 country and T= 37 years xtabond2 Index L1.Index L2.Index Savings private Value FDI...
10 August 2021 3,624 3 View
Dear researchers, I have been trying to estimate a littlequantile regression with instrumental variables for panel data and I kept getting an error. I believe the error is from the input section....
10 August 2021 4,928 2 View
I need to measure hydrophilic and hydrophobic organic carbon separately from my water sample. Is it possible to do so using a TOC analyzer?
08 August 2021 2,658 4 View
The doument by WHO on the Process of translation and adaptation of instruments have been moved from the original web link. I want to locate a copy or the new link.
06 August 2021 1,547 3 View
Drear All Hoping you are doing great, I’m conducting spatial analysis on Expressway in Malaysia, however, I don’t know how to determine the length of the hotspots because the clustering of hot...
04 August 2021 4,219 5 View
Hello, In the case where we need to validate measurements of a sensor but we don't have a reference sensor, how can we validate these measurements without references ?
03 August 2021 1,014 12 View
Hi everyone! I am looking for a test instrument measuring Visual Thinking Skills. I am on my journey to finish my degree. Thank you
01 August 2021 779 2 View
I am going to carry out an investigation to study the relationship between the use of social networks by Spanish adults and other lifestyle variables. I would like to know what is in your opinion...
29 July 2021 694 4 View
An instrument that has some pre-selection to see groups of items from the instrument. Participant choose a maximum of 3. Participants later score the chosen ones. It is any way to analyse...
28 July 2021 6,753 3 View
Hello, I have an inherited Comair Root Length Scanner that seems to be in good working order. However, any user manual or protocol for the instrument appears to have been lost to the winds of...
27 July 2021 8,136 1 View
Please advise on freely available measures to measure anxiety at the state level.
23 July 2021 4,906 5 View
I am analyzing a material using both wet and dry method..but getting results on higher side using wet dispersion. What can be the reason??.which parameter should I optimize
16 July 2021 5,508 3 View
I am planned for my dissertation regarding sufficiency preoperative education among patient undergoing cardiac surgery. Is there any related instrument that I can use? There are limited source...
12 July 2021 2,962 3 View
I've been working on IL-13 gene expression analysis using SYBR green master mix and step one plus device, I tried 3 different sets of primers but still there is variation in cycle threshold...
12 July 2021 5,104 3 View