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Questions related to Zero

When explaining substitution models, the substitutions are expressed as Q matrix. Why is the sum of the elements in a row zero?

28 February 2021 4,031 3 View

I am refining my XRD data using in FullProf program. The intensity of the modulated X-ray peaks is almost flat. I tried to adjust the peak intensities but unsuccessful. What is the reason? I guess...

23 February 2021 2,465 4 View

Recently we used single staining to make a compensation matrix. But, for each single staining we saw that 13 to 25 percent of our negative population had been shown below Zero. In this situation...

21 February 2021 10,097 2 View

I have two groups (unpaired) of plant biomass measurements and want to know whether there is a test that can be used to determine statistical significance where assumptions are not violated. The...

18 February 2021 1,373 4 View

I understand that for partial mediation to have occured the CI for the indirect effect must not cross zero and the b value for the indirect effect should be smaller than the b value for the direct...

14 February 2021 3,425 7 View

Hello I have 2 groups with different sample sizes of (experts: 5 to 8) and (Users: 28 to 35) answering 21 questions on a 7 points Likert scale about the importance of some dimensions for...

31 January 2021 4,008 7 View

How nessesary is working point zero charges for any adesorbent? I want to know how suitable the surface of the material is good for adsorption. I got SEM and FTIR results and thought those are...

30 January 2021 5,218 2 View

Hi everyone, recently i have a question about how to calculate the orthotropic elastic matrix of cancellous bone cube. I really need the help!!!! I applied six stress states to the cancellous...

21 January 2021 9,226 2 View

More specifically, how to integrate the distribution function from zero to infinity at any time to solve a dynamic equation.

20 January 2021 7,091 3 View

First of all, thank you for your consideration about this question. I've been working on development of in-vitro diagnostic medical device as research engineer since 2013. Especially, my major is...

14 January 2021 3,988 4 View

I need to answer this question to continue my research.

12 January 2021 3,776 5 View

I always read "the higher the score the better the health", however, it seems to me that it is not true by the way the two summary measures are constructed. Or maybe - highly plausible - I am...

11 January 2021 4,727 1 View

In conducting meta-analysis of binary outcomes (in RCTs), in case the risk ratio has not been reported, what should we do with the studies that the number of outcomes occurrence is zero in both...

09 January 2021 2,906 5 View

Inverse of electron's effective mass can be obtained as second derivative of energy for k. On the other hand, linear dispersion gives value of zero for second derivative since second derivative...

07 January 2021 5,705 2 View

I found that, there is a difference in pHPZC value when higher impregnation ratio of acid on adsorbent surface. Lower pHPZC value when higher ratio of acid impregnation and adsorption performance...

05 January 2021 7,359 3 View

Can I do inferential statistics with regression if there are zero cells in cross tabulation results of predictors and dichotomous dependent variable in a certain research?

31 December 2020 7,862 3 View

In the paper A wavelet-based method for power-line interference removal i... we propose a new method for removing PLI. This method consists in identifying the ECG and noise frequency range for...

29 December 2020 9,340 3 View

A permeability of an antiferromagnetic along the spin axis is zero in T = 0 K as it is written in any handbook of magnetism. Why a magnetic field oriented along spin axis cannot reverse spins in...

27 December 2020 7,610 6 View

I'm trying to model a single tied rigid rocking block using self-centering mechanism. Analysis is done in two stages; first, the block's weight then, a lateral load continuing from the previous...

25 December 2020 7,911 1 View

i have run a simulation for a protein (minimization, equilibration and production). in minimization step, the potential energy value in the log file is minimized at temperature = 0 K. in the...

23 December 2020 8,846 3 View

If the magnetic direction of any two black holes is made equal. So the capacity of attraction decreases to zero? If it becomes zero. So we can make the ability to magnetize / attract other...

22 December 2020 3,157 4 View

Let k be a field of characteristic zero and let a,b,c,d belong to k[x,y]. Assume that k[x,y] is flat over R_1=k[a+c,b+d] and over R_2=k[a-c,b-d]. Is it true that k[x,y] is flat over R=k[a,b,d,c]?...

20 December 2020 6,315 2 View

I am performing NMR (Nuclear Magnetic Resonance) analysis on rock cores. I need to seal the cores to prevent fluid penetration. However, i do not want any hydrogen signal from my seal. I have...

20 December 2020 1,941 5 View

I am using a VUMAT code for describing a linear Elasticity? but the code is not working and ABAQUS is showing error: Bad Material definition in element number 1 instance PART-1-1: zero or negative...

14 December 2020 6,665 3 View