In SEM, while extracting the factors from a set of observed variables, is it principal component analysis (PCA) or Factor Analysis?

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In SEM, what is the physical significance of eigen value while doing principal component analysis (PCA)?

10 November 2018 7,419 4 View

What is the correct formula for availability; MTBF/MTBF+MTTR or MTTF/MTBF and why?

I am very confused about the formula for availability because it is given by uptime/uptime+downtime.

07 August 2018 6,690 4 View

In Taguchi Method, why the degree of freedom for a factor is given by formula (level-1)?

I cannot understand why 1 is subtracted from the level to find out the degree of freedom?

06 July 2018 859 1 View

How one can explain the meaning of software reliability giving an example and mentioning the name of a specific software?

The functionality of a machine can gradually decrease due to tear and wear. Hence, reliabilty of a machine is an important phenomenon with time. But how the functionality of a software can get...

06 July 2018 8,132 0 View

What is the interpretation of (y bar square/variance) in 'Nominal is Best' method of S/N ratio calculation?

What does this ratio indicate? Please see the attached file.

06 July 2018 3,069 0 View

Does failure function represent the probability density of failure rate?

If f(t) represents the probability density of failure rate, then how it it possible that f(t) will follow exponential distribution whereas the failure rate is constant?

06 July 2018 5,481 5 View

How the formula for failure rate R(t1)-R(t2)/(t2-t1)Rt1 is derived?

Please state the derivation of the formula of failure rate.

06 July 2018 1,270 2 View

What are the differences among flexible manufacturing system (FMS), computer integrated manufacturing (CIM) and totally integrated automation (TIA)?

05 June 2018 10,044 4 View

MICLASS and DCLASS coding system in group technology follow which type of coding: monocode, polycode or mixcode?

MICLASS and DCLASS coding system in group technology follow which type of coding: monocode, polycode or mixcode? Why Opitz classification and coding system is a mixed code. I can understand that...

05 June 2018 3,062 2 View

In structural equation modelling (SEM), how to collect the data of the indicators under a moderator variable (please see the explanation)?

Suppose, I have two predictor/independent variables A and B that (i.e. both A and B) affect a dependent variable D. I have also a moderator variable C that influences the relationship between A...

05 June 2018 1,233 4 View

How can I prepare virus for a TEM or SEM imaging?

I have virus (viral hemorrhagic septicemia virus) in suspension and the experiment will not involve cells. What level of TCID50 is preferred?

11 August 2024 3,115 1 View

How to learn more about SPSS and its Application?

I would like to learn more about SPSS and Its application especially in regards to data analysis. Please suggest me how I can learn more about it. Thank you so much.

11 August 2024 9,101 4 View

Can I base on reverse DNA sequences to perform alignment, convert to amino acids and GenBank submission?

I have reverse sequences (AB1 format), can I base on reverse DNA sequences to perform nucleotide alignment, convert nucleotides to amino acids and deposit the sequence in GenBank database?

11 August 2024 5,138 1 View

Baseline drift in HPLC? What causes this?

Hello, Why do i see this baseline drift when i compare my blank (black) to the sample (blue)? Any suggestions as to why this happened? Thank you!

11 August 2024 3,770 4 View

Text-Communication from the M1 Hand Area using BCI—and then there is Elon Musk?

Willett, Shenoy et al. (2021) have developed a brain computer interface (BCI) that used neural signal collected from the hand area of the motor cortex (area M1) of a paralyzed patient. The...

10 August 2024 7,180 0 View

Handling Missing Data and Building a Predictive Model with Incomplete Information ?

I am developing a predictive model for a water supply network that involves 20 influencing points. However, I only have historical data for 10 out of these 20 points. I would like to know how to...

10 August 2024 4,005 2 View

Has anyone applied Python in the field of textile engineering for data analysis, automation, or smart textiles?

I'm currently exploring the application of Python in textile engineering, specifically in areas like data analysis, process automation, and the development of smart textiles. I'm interested in...

10 August 2024 7,429 2 View

Strugglling with m6A dot blot any suugesstion ?

I have been doing the m6A dot blot for a while with no improvement, I am extracting the RNA, and I can see the dots although the three biological replicas give a different reading on the memberan...

10 August 2024 8,539 5 View

Is it possible to use the Fused Deposition Modeling (FDM) to additively manufacture interconnected porous structure generation of >100-200 micrometer?

Usually, additive manufacturing techniques like SEBM, SLS, and SLM are used for interconnected porous lattice structure generation with sizes of >100–200 micrometers. Can the Fused Deposition...

09 August 2024 7,892 0 View

How can I use the cif data obtained from rietveld refinement extracted via gsas2, for microstructural analysis using ETEX software?

09 August 2024 7,718 0 View