How should I deal with missing data?

12 February 2021 5,306 4 View

What is the ideal value of UACI for image encryption scheme?

UACI - Unified Averaged Changed Intensity between cipher images. Why some papers refer ideal value to be 33.33 and some refer it to be 33.46? Which is the correct value? (In reference to image...

11 February 2021 9,562 2 View

Should a better value for UACI be below or closer to ideal values or higher as possible?

The ideal theoretical value for UACI(Unified Average Changed Intensity) is 33.33% for testing the robustness of image encryption algorithm against differential attacks. Is it better to have a UACI...

30 January 2021 2,016 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

Should the correlation between adjacent pixels in a cipher image be low or close to zero as possible?

This question in the relation to calculating the horizontal, vertical, and diagonal correlation of a cipher image in an encryption algorithm. I have read that the correlation values should be as...

13 January 2021 1,297 4 View

What are some of the efficient techniques used for image scrambling?

I am using 3D Arnold transform for my EC-ElGamal encryption technique but it consumes a lot of time during the execution of the program using Python. So I was wondering if there are BETTER ideas...

07 January 2021 205 2 View

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01 January 2021 9,970 2 View

What are the assumptions and limitations of Miner's rule ? Is there any better cumulative damage model available for steel?

What are the assumptions behind miner's rule? Is there any cumulative damage model that takes care of these assumptions?

14 December 2020 333 1 View

Binary Logistic Generalized Linear Mixed model in SPSS. Is it doable?

I want to analyses the proportion of swimming sperm of three species of fish in two salinities. To analyse the proportion of swimming sperm in a Generalized Linear Model, I would use a Binary...

03 March 2021 2,297 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

What analysis to choose with a large neste dataset and clearly skewed or kurtotic distributions?

Hello! I have a dataset of n=3000 nested within 8 countries with approximately 200 or 400 responses in each country. I originally planned to perform multilevel modelling with 4 dependent variables...

02 March 2021 6,865 1 View

How can we simulate an hyperelastic-viscoelastic behavor with Ansys APDL?

I am working on modeling and simulation of biomecanical material behaviour, I have succeded on simulating skin using anisotropic hyperelastic material, on APDL and in our lab's finite element...

28 February 2021 552 3 View

How can I improve the concentration of banana fruits extracted RNA?

Currently, I'm working with banana fruits. I've tried to do RNA extractions with different methods, and I've gotten total RNA without contamination, but I couldn't get a high concentration of...

22 February 2021 6,126 2 View

Which books and review articles describe well the current state of deep reinforcement learning for the optimal control of physical processes?

I am going to treat in a lecture the application of deep reinforcement learning for the optimal control of physical processes. Therefore, I am looking for the best references. Besides the classics...

16 February 2021 1,006 6 View

Does calculating the interaction index between a drug and a food matrix make sense?

Dear all, I'm conducting the revisions of some of my manuscript, with is the impact of the combination of Aspirin and a fruit juice in colorectal cancer cells. Two of the reviewers have asked to...

16 February 2021 3,141 3 View

Is an issue for serial correlation when it is not found with the xtreg, fe on its lag ,but the lag become significant when you've vce(robust) std. er?

Dear Sir/Madam I have a dateset that suffers from heteroskedasticity and serial correlation. To address the serial correlation lag my variables of the fixed effect regression. I retrieve the...

15 February 2021 3,700 1 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

How to best represent qPCR DD Ct or D Ct as a box plot?

I've been reading up on how to best represent qPCR data, specially on answers given on this site by Dr. Jochen Wilhelm. I understand box plots are the way to go, but I still don't understand them...

11 February 2021 7,228 3 View