How to solve error : small pivot detected during factorization?

Alessandro Giustina @Alessandro-Giustina

10 November 2022 0 5K Report

Hello,

my problem is very specific: running implicit calculation I came across the error of small pivot detected, but only when turning the controll shell CNTCO option to 1, if it is 0 It runs.

Does anybody now why?

Badges
Science topic

More Alessandro Giustina's questions See All

Can someone explain me how to insert the actual distance between two well logs in Petrel (picture attached)?

I uploaded two well logs to the "Well section window" of Petrel and they were attached together without any space. Then, I modified the horizontal scale from "relative" to "constant (50)". They...

12 June 2024 8,666 2 View

DNA purification from ATCC 25922 E.Coli strain with QIAGEN kits?

Hi everyone, We've got a plasmid we want to purify from E.Coli strain ATCC 25922. We usually use QIAGEN plasmid purification kits but we've never purified DNA from this particular strain. Would...

20 May 2024 3,803 1 View

steam distillations with urea/water solutions. do you have any directions to give me?

Good morning, I am carrying out steam distillations with urea/water solutions on fresh rosemary, urea has a relatively low vapor pressure and in theory the vapors generated by this solution should...

30 April 2024 3,920 1 View

Glycerol stock pichia pastoris ?

Hi ,I've woken up my electroporated picha pastoris strain from the glycerol stock at -80°C.from 2020. The literature said that it could be stored for years I tried to cultivate it, and the strain...

23 April 2024 5,940 8 View

Any updates of macroeconomic variables and energy modelling being tested in econometrics?

Are there new projects and studies considering recursive approaches, in energy transition and resources, being empirically tested with regression analysis and models?

14 April 2024 7,024 4 View

Open channel hydraulics inside pipes, transient regime?

Someone has a computer program, algorithm or spreadsheet to solve problems of transients on a water flow in open channel regime through a circular section (flowing inside a pipe with free surface)?

10 April 2024 9,477 2 View

FeCl3 in HCl + culture media for microbial growth?

Hello, I've seen that this question has been already asked other times on Reddit and ResearchGate but with different details. So I'm asking it too with my specifications. I need to prepare...

18 January 2024 171 0 View

How to model a packed bed in Aspen Custom Modeler?

Hi, I am modeling a packed bed in ACM. I have to write 3 differential equations. At the moment the model is under by 6, but idk how to write boundary conditions. Plus, shall the model be under by...

09 December 2023 3,527 0 View

How to interpret SIMPER p-values in R?

I am doing a SIMPER analysis (in R) with the values relating to individuals contacted in different reproductive seasons to see how the surveyed bird community has changed, and which species...

05 November 2023 1,382 0 View

Is there any deterministic phase transiton other than cellular automata's?

I'm working on a many-unit model that shows a deterministic phase transition driven by a control parameter that do not contain noise or disorder, and drives the system to chaos basically, but at...

28 September 2023 7,091 14 View

Which test should be used to study association among demographic profile and awarness level?

i have to study the awareness and adoption level of cloud computing in a district of India. i also want to use association among demographic variables like gender, age, education, income etc and...

02 August 2024 2,420 3 View

Posthoc test lettering in JAMOVI?

Does anyone know of a module for the JAMOVI software that is capable of generating mean separations using the classic letters based on post hoc results (e.g., Tukey test)? If, as I believe, such...

31 July 2024 3,333 4 View

How to do Mann-Whitney U test with Bonferroni corrected p-values?

Dear All, My lab primarily works on insect wing patterns. In one of the projects, my student and I have defined 19 abnormality characters on the forewing and 6 abnormality characters on the...

31 July 2024 6,464 5 View

Bonferroni correction. I have independent t-test, paired t-test and ancova conducted. Which test would require Bonferroni adjustment?

I have two groups that I test on three different tasks. I have 4 independent t-test, 6 paired t-test and 2 ANCOVA. My concern for which t-test should I conduct bonferroni correction. At the moment...

28 July 2024 7,827 6 View

Can I use Likert scale with Paired Sample T-test?

Hey researchers! I am currently doing a research about to what extent in which A has accelerated the inclusiveness of the payment system in my country. Down below are a few examples of the...

26 July 2024 5,654 3 View

Paired t-test or unpaired t-test for my quantitative data with SPSS?

I am conducting a qualitative-driven approach to mixed-method research. The role of my quantitative data is to corroborate the findings of the qualitative data. Qualitative data has been collected...

24 July 2024 9,799 3 View

Chi-square test for allele distribution?

Hello, when calculating the p value for the alleles in the table, how do we place the values in the chi-square test in the four-eyed table? Thank you very much for your attention.

17 July 2024 998 2 View

How to calculate Cohen's d from CI 95 and t value from a paired sample t test?

We have conducted a systematic review to investigate the effectiveness of a treatment for a psychological disorder. We aim to report effect sizes and p values of the reviewed studies but one study...

10 July 2024 7,186 4 View

What kind of t-test can I use if I have two variables measured using the same raw data?

I plan to perform a t-test between risk index and leakage values to know if there is a significant difference between leakage values of low, medium, and high risk pipes. However, the data I have...

10 July 2024 6,199 3 View

How to analyse response rates of a questionnaire?

I have developed a questionnaire. I want to try and analyse question drop-off. There is a clear negative correlation between question number and percentage of respondents who answered that...

07 July 2024 9,435 1 View