How do you organize your manuscripts, scripts, data, and literature?

Keeping your scientific data and analysis scripts in order is not only good style but a prerequisite to enable reproducible and accessible scientific evidence. Beyond that, keeping your...

31 December 2014 7,151 4 View

What does a replication of a null result mean to you?

A million dollar research grant was issued to reject null hypothesis X. Unlucky researcher A could not find statistical evidence to reject X. With his test, he found a non-significant p value of...

01 February 2014 4,098 58 View

How to determine the number of age group bins for an age stratification?

For example, when dividing a large sample into a training and a test set, how do I best choose the bins for an age stratification? Should bins reflect years, decades, or should they be based on...

31 December 2012 6,056 11 View

Does AIC require the truth to be in the set of candidate models?

The opinion on this diverges in the literature. Some claim that AIC does require the true model to be in the set of candidate models, that is, in the case of linear regression, the true model is...

10 November 2012 4,995 18 View

What is the best program for managing to-do lists?

There are a variety of software tools ranging from simple, non-hierarchical to-do lists to fully grown project management tools. I think that for many scientists, the right tool lies somewhere in...

10 November 2012 3,318 35 View

What are the most useful programs in your daily scientific routine?

Please kindly state your operating system and maybe drop a few lines, why the mentioned tool is better than the others. Looking forward to here what tools you are working with!

09 October 2012 4,582 44 View

What is your favorite Structural Equation Modeling program?

Among the great variety of programs (M+, OpenMx, lavaan, sem, Amos, Onyx, ...), what is your favorite program and why? What makes this program better than the others? What features are you still...

09 October 2012 186 93 View

How would you determine whether a classifier is significantly better than random guessing?

In empirical research, it is often of interest, whether two classes are different. While in the simplest form, this is achieved by performing a t-test, classifiers can be used to answer such...

09 October 2012 1,267 19 View

How well can you predict variable "z" in this dataset?

This is a toy example with four variables v,w,x,y and a binary outcome variable z. What approach would you take to find a statistical or algorithmic model to predict "z"? If you choose to perform...

09 October 2012 6,142 15 View

How would you explain to your parents(*) hypothesis testing and significance?

The shorter, the better! (*) assuming that your parents don't have a formal statistical training. If so, go up your family tree as many levels as needed.

08 September 2012 6,468 26 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 2021 0 0 View

Do we need to write protocol for a second study of a systematic review that has been registered and published?

I have conducted and published a systematic review and meta-analysis research with the topic related to public health and health pomotion (protocol was registed in PROSPERO). Now we want to...

03 March 2021 8,920 3 View

Resistor definition in Piezoelectric bimorph with ANSYS workbench

Hello, good day! I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, the output power doesn't change with resistor value. Please help to find the reason. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Thanks in advance Regards,

02 March 2021 0 0 View

How to get onecolumn document from standard IEEE ACCESS LateX template?

I have prepared a manuscript in IEEE Latex template, but for some purpose, I need to prepare a word file as well (detailed format is not required). Compared to two column .tex file, one column...

02 March 2021 1,830 3 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

Ideas for Phd's Thesis on pricing (Marketing)?

Hi everyone, I'm studying Marketing and I would like to write my PhD thesis on the topic of pricing. Any specific ideas?

02 March 2021 9,706 5 View

How to repeat an operation on an atom selection for multiple times in PyMol?

Hi, I am trying to construct a multi-layer fibril structure from a single layer in PyMol by translating the layer along the fibril axis. For now, I am able to use the Translate command in PyMol...

02 March 2021 4,569 4 View