How can I calculate the number of TP, TN, FP, FN from just the sample size, sensitivity, and specificity reported in a study?

I am planning to condacting a diagnostic accuracy systematic review and meta-analysis. In order to calculate pooled sensitivity and specificity. I need to know the number of TP, TN, FP, and, FN...

22 April 2020 5,685 3 View

I need to put 15 sec delay to my push button, that activate a contactor to controll other machine?

Figure attached, to get your support how to delay a push button using analog timer.

20 February 2020 7,908 3 View

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

Standard curve shifting over time. How do I stabilise the ELISA?

24 February 2021 1,365 3 View

How does the injection volume impact LLOQ and ULOQ in regression analysis (LC-MSMS)?

Hello, I have run into an issue that has sparkled a debate at work: is the LLOQ/ULOQ impacted by injection volume under the following circumstances: 1) Same dilution factor of all samples 2)...

23 February 2021 9,159 3 View

How to estimate/know plant virus concentration to make a standard curve in ELISA after serial dilution?

Hello, I am trying to know tomato virus titer/concentration in samples and I will perform serial dilution of the positive control. I wanted to ask How to estimate/know plant virus concentration to...

13 February 2021 6,534 4 View

XRPD Quantification - Building a calibration curve of drug excipient?

I am aiming to utilise XRPD to quantify a drug excipient within a drug product and have been having a little trouble building the calibration curve to allow for this quantification up until this...

10 February 2021 6,145 3 View

How to find the chi square test value for histograms of plain and cipher image?

I want to test the uniformness of values in histogram through chi-square analysis in an image encryption algorithm.

29 January 2021 4,093 2 View

What are different ways to compare the histogram of cipher images from various encryption schemes?

Is there a metric to find if one histogram of cipher image is better than other? I tried calculating the variance of the image but couldn't get the intended results. Are there ways to compare...

28 January 2021 479 3 View

How is the variance for an image exactly computed to test the uniformness of its histogram?

I am trying to compute the variance of a plain and cipher grayscale LENA image... I found in a paper that variance value is equal to 630780 for a plain Lena image while if I calculate I find it...

28 January 2021 8,036 5 View

What is a good software for non-linear curve fitting rather than Excel and Lab Fit?

I am looking for good software for curve fitting. My curve equation is non-linear. I used Lab Fit and Excel software but could not find the curve equation with good accuracy. What software do you...

20 January 2021 5,554 13 View

How can we determine the basin borders by GIS?

Hi We are working on a research about prediction river discharge in ungauged stations. we considered some stations and each of these stations has a sub basin that we know the area of each sub...

10 January 2021 3,806 5 View