What is the need of Sum rule in S-matrix?

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What will be the consequences if a predictive regression model has 'Rsquare'=1 with training and test data set?

Recently, I came across this situation wherein the value of Rsquare found to be 1 with the lower RMSE. What does it mean (in the practical sense)? Will it have any different consequences than...

29 September 2020 7,880 6 View

Is there any difference in the instrument rating of an instrument mentioned in the technical manuals and operation manuals?

It has been seen that the instrument rating of an instrument mentioned in the operating manual is different from what is mentioned in the technical manual (Not all, but few). If we disregard the...

22 August 2020 853 3 View

What are the latest trends in Reliability and Maintainability Tools development ?

Reliability and Maintainability(R&M) are important parameters to decide a product's life and its standard operations. So, What are the latest trends that are being followed in Reliability and...

25 July 2020 7,227 9 View

What are the different methods of estimating snow melt contribution in runoff?

I want to estimate the runoff due to rainfall but the data I have, contains final runoff (i.e. runoff + snowmelt) so is there any method to calculate the contribution of snowmelt in the final...

16 July 2020 6,415 3 View

What should be the sample size of control and experimental groups in a between subject design?

Hi everyone. I am a PhD student. I have designed an educational manipulative and have to validate it with children. I am using between subject design for it. So there would be two groups-...

21 November 2019 8,173 2 View

What is the criteria to select the range of normal stress in Direct shear test?

I did not not find the answer anywhere. Please help.

19 August 2019 9,950 3 View

How can the trigonometric expression be solved for particular variable in MATLAB?

When I try to solve the symbolic trigonometric expression, I am not getting desired results even results exist. The MATLAB code is written as follow: clear all clc syms nq lam alfa ai theta phi...

16 July 2019 1,380 2 View

235th ECS meeting. Dear researcher, anyone from INDIA going to attend this ECS meeting which is going to held in Dallas, Texas, USA..?

If anyone here from INDIA going to attend 235th ECS meeting 2019, kindly ping me, my no. 9444313625. We can register together for accommodation n save money, enjoy have fun. Thanks.

15 February 2019 4,123 2 View

For design of cantilever sheet pile walls, why frictional resistance along the depth not considered?

For design of cantilever sheet pile walls, the frictional resistance along the depth are not considered as in the pile case. please explain.

11 February 2019 4,649 3 View

Relative gene expression analysis by 2deltaCT method?

Hello, In my experiments I divided mice into 4 groups. one group fed on control diet, second group on high fat diet (hfd), third on hfd+treatment1 and fourth on hfd+treatment2. While analysing...

27 December 2018 1,455 3 View

MD MOE RMSD

How to calculate the RMSD values for a MD simulation using MOE?

07 August 2021 0 0 View

MD MOE RMSD

How to calculate the RMSD values for a MD simulation using MOE?

07 August 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

16 June 2021 0 0 View

fatal error

16 June 2021 0 0 View

fatal error

16 June 2021 0 0 View

Physics: Why do we describe light by referring to its wavelength, but microwaves and radar pulses by referring to their frequency?

In physics, the description of the properties of light generally refers to its wavelength (nm), while in the range of microwaves and radio waves we refer to the frequency of a signal (e.g. kHz or...

03 March 2021 1,682 3 View

Could you recommend any books about Number Theory?

Beginner level books. High level books. Analytical Number Theory. Algebraic Number Theory. Combinatorical Number Theory. Books about partitions. Books about primes.

03 March 2021 7,174 5 View

Arena simulation - how do i model the following model in ARENA (see description) (new to ARENA)?

Hello, I'm fairly new to ARENA and I have the following problem: I have two queues in which, in each queue, a different order type arrives (both having an arrival rate of exponential 10). Order...

02 March 2021 2,431 3 View

Why are the velocities so high in my Boussinesq approximation Fluent simulation?

Hello, I have a mechanism where air rises due to convective flows. In this simulation, nothing is driving the air except this. I understand that the Boussinesq approximation only works for small...

02 March 2021 4,910 3 View

E. A. Strokovsky

Dear colleague! Look back on the atomic physics and the sum rules known for atoms. You will answer your question by yourself!

Any strict (i.e. without additional ad'hoc assumptions) sum rule plays a role of a "conservation law". If it is violated, then some of assumptions (or all of them) are wrong. If it is fulfilled - then either you found a new "conservation law" (provided you did not introduce ad'hoc assumptions), or some of them (assumptions) may be correct. An excellent example in particle physics is related with so-called conception of "duality" (see papers in '70-'90 issues of Phys. Reports, for example).