Can someone help me with this error that I am getting while estimating a VAR model in R?

I am using annual time series data to estimate a VAR model in R. However, when I run the command to find the optimal lag length, I get the following error: Fehler in VARselect(data, lag.max = 10,...

18 February 2021 9,647 3 View

A three level hierarchical data structure in multilevel modelling, for multiple response question?

Im refering to Andy Field's example in his book Discovering statistics using SPSS, 3rd edition, page 728, where he gives an example of a data structure with level 1 variable is a memory recall...

26 December 2020 9,717 6 View

How to convert Unit/mL enzyme concentration to FPU/mL or FPU/g concentration?

Is there any conversion formula for this purpose.

06 December 2020 3,283 3 View

How many LED bulbs (warm light) will be required for algal growth?

We have 10 glass boxes with 6 inches width and 12 inches depth. How many LED bulbs or halogen lamps will be required to achieve irradiance of 150 umol/s/m2.

23 November 2020 9,414 4 View

What major hardships teachers are going through due to COVID-19?

Teaching Hardships during COVID-19 in 2020 Please highlight what type of hardships, difficulties you as a teacher going through during these trying times due to COVID-19 around the globe? Even...

05 November 2020 4,142 20 View

Anyone can share a test to measure the level of critical thinking skills in university students?

I am PhD scholar, intended to conduct an experimental research to develop critical thinking skills in prospective teachers. if any one developed a test measure please share with me. bests

26 October 2020 4,403 8 View

Please guide me that which theory will relate to the relationships of personality traits, optimism and somatic symptoms disorder?

I have to write the theoretical framework for the course project regarding the relationships of personality traits, optimism and somatic symptoms disorder? Can anybody guide me that which which...

20 October 2020 6,709 4 View

How to measure internal validation of multiple regression using a split-sample method with dichotomous variables?

I would like to validate a regression model using a 50-50 (or 80-20) split method. In my initial multiple regression I have entered all predictor variables using 'enter' technique. My sample size...

20 October 2020 2,849 5 View

Is it dangerous, if samples produce hydrogen gas inside muffle furnace at temperature around 300-400degree celcius?

Geopolymer, derived from flyash, NaOH, Al powder is required a heat treatment inside the muffle furnace. It may cause releasing hydrogen gas inside the furnace. Will it be explosive? or dangerous?...

11 July 2020 3,405 3 View

How the functionalization of AC, graphene and CNTs affect surface area and pore volume?

As we study that modification/functionalization of any carbon material affect its surface area and pore volume. In literature, sometimes the surface area decreases while in some it increases. I...

07 June 2020 4,783 8 View

How to analyze a particular region of my simulation box in GROMACS?

Hi, I am using GROMACS 5.1.4 to simulate water in contact with a surface. I am only interested to calculate some properties of water near the surface. Let's say at a distance of x nm from the...

03 March 2021 9,989 2 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

What are the most reliable approaches to extract key continuous frames from a video, with complete automation?

I have an input video, of skin (from a microscope that means it is magnified such that blood capillaries are visible). The idea is to extract 15 sec of continuous frames from a video of 1 min,...

02 March 2021 2,735 2 View

How can the modification of garden soil cause global warming?

Hello, I am working on a soil project and I found a primary research article that tests how the modification of agricultural soil can cause global warming, using a thermal collector, however I...

02 March 2021 7,161 3 View

How can extract ciprofloxacin hydrochloride disolve in water er to organic solvent such as dichloromethan or any other solvent?

I need a procedure to extract the ciprofloxacin hydrochloride from aqueous solution by using dichloromethane in detail,. I thank you very much.

01 March 2021 4,306 1 View

Does anyone know how to plot my station to a section plot on Ocean Data View (ODV)?

I made a vertical section plot with WOA .nc file on ODV, and now I want to plot my stations (csv. file) in it. Does anyone know how to import my points to the section? They are two different...

01 March 2021 3,610 1 View

Does anyone know an alternative product for cardiac Troponin T antibody for Immunofluorescence (Thermo # MA512960)?

We have been using Thermo Fisher anti-cardiac Troponin T antibody for immunofluorescence staining in FFPE mouse heart sections but it was recently discontinued. The literature shows it to be the...

01 March 2021 4,937 1 View

Which bacteria are suitable for quorum sensing screening?

I want to find a quorum sensing inhibitor from plant extracts. Klebsiella pneumoniae, Moraxella catarrhalis, Staphylococcus aureus, and Streptococcus pneumoniae. I looked for these strains...

01 March 2021 7,675 3 View

Does anyone know to clarify these changes?

01 March 2021 1,290 2 View

How to perform statistical analysis of coefficients extracted from transform techniques?

I am studying the potential of DCT and FFT coefficients extracted from a signal to classify the different objects that emit the signal. I applied the Shapiro-Wilk to confirm that data was not...

01 March 2021 8,079 2 View