Global management market of courses & marketing to improve quality in Pt Treatment or science or mainly Bureaucracy?

12 October 2020 9,272 1 View

SEM: What does CFI = 1 & RMSEA = 0 indicate in over-identified models?

I'm suspicious about "perfect fit" in my SEM path analysis, with fit indices of CFI = 1 and RMSEA = 0 which I would expect from an just-identified model. However, since I have 3 degrees of...

08 August 2020 1,492 4 View

Data on most frequently researched KSAOs or personality traits?

I'm looking for meta analyses or reviews, summarizing which knowledge, skills, abilities and other characteristics (KSAOs, especially personality traits) are most frequently researched in...

22 May 2020 332 1 View

How to test unidimensionality for polytomous data with IRT-models in R?

I would be thankful if someone could give me a short breakdown on how to test unidimensionality of polytomous data (likert-scale) using IRT-models in R. As it is my understanding that the...

22 November 2019 6,730 7 View

How do you optimize your research design for questionnaires with large item pools?

While developing a questionnaire to measure several personality traits in a somewhat unconventional way, I now seem to be facing a dilemma due to the size of my item pool. The questionnaire...

30 May 2019 2,633 4 View

What factors generally improve inter-rater reliability?

I'm developing a questionnaire to assess observational data in an area of research which is notoriously prone to low inter-rater reliability. Hence, I'm looking for factors in questionnaire design...

03 December 2018 4,006 3 View

Machine learning in economic research?

What is your take on machine learning as an applied method in economic research. is it a game changer or will it not impact your approach to research?

22 July 2018 7,401 5 View

Is there any way to statistically test control samples with parent material?

I want to statistically test the relative gene expression of precision cut liver slices with the gene expression of their parent livers. I have 14 samples from 3 different parent livers that I...

09 March 2018 4,517 4 View

What is the average magnitude of correlations between common personnel selection methods?

Looking for recent (preferably meta-analytic) findings that yielded estimates of the proportion of shared variance among common personnel selection methods such as structured and unstructured...

11 December 2017 1,946 3 View

Does anyone have information about the Ecology of the Chrysomelid beetle "Chrysolina cerealis"?

We have to manage one its the last populations in Northern Germany and would be glad to gather knowledge!

07 November 2016 1,225 3 View

I need to image mesoporous silica nanoparticles that are in ~100 nm size and do high resolution TEM to look at mesopores. what grids should I use?

Need to image mesoporous silica nanoparticles using the TEM. Also, need high resolution TEM images to see the mesoporous structure. Kindly suggest what kind of grids to use. Thanks, Shatadru

02 March 2021 1,787 2 View

How to size battery banks?

I am designing a small grid connected solar PV power-plant. As the battery's capacity is specified in Ah and demand in kWh. What is the best way to size the battery bank? I have battery price in...

28 February 2021 1,638 3 View

How to model the battery pack in PSIM or PSCAD?

Hello, I have simulated a single battery cell using Thevenin equivalent circuit. For a battery pack, I have a large number of cells connected in series and parallel connections. Is there any way...

28 February 2021 2,116 1 View

High aspect ratio hexahedral mesh optimization solver?

I am interested in evaluating mesh optimization solvers that converge to high aspect ratio unstructured hexahedral grids. In other words, I am interested in a solver that optimizes warpage,...

26 February 2021 7,279 2 View

How to calculate battery consumption for IoT device?

Hi, everyone I'm working on a privacy-preserving algorithm that will apply to IoT devices. So, I need to measure the power consumption by implementing this algorithm. Any suggestion, advice,...

25 February 2021 8,749 6 View

How to delaminate copper in water-based anodes?

Hello everyone, I'm looking for a way to delaminate copper current collector of water-based anodes in Li-ion batteries without damaging the graphite film. I tried different materials such as HNO3...

24 February 2021 3,785 3 View

How to clean up TEM grid with plasma cleaner?

I need to clean the hydrocarbon contamination on the carbon substrate of TEM grid. However, I heard that substrate could be broken by the powerful plasma. My substrate is pure carbon, with ~3nm,...

23 February 2021 3,262 5 View

How to find natural frequency of a bridge from vehicle induced vibrations?

i have frequencies of bridge that are effected by mass of vehicle. the problem is when any vehicle pass the bridge it would add the its mass to the bridge mass ultimately mass of the bridge will...

22 February 2021 10,004 3 View

Best excel chart to compare algorithms' running time?

Hi I want to compare the running time of robotic path planning algorithms. The grid size is 8X8. I have 100 scenarios of start and goal positions.. Each scenario is run in three obstacles ratio...

22 February 2021 621 1 View

The Role of Town Planners in CAV Use?

Colleagues and I are about to begin a project investigating the role of town planners and local authorities in establishing the introduction of connected and autonomous vehicles (CAVs). What...

21 February 2021 2,247 3 View