How to define custom boundary condition between particle and wall in comsol multiphysics?

I was trying to incorporate stick-slip boundary condition between particle and wall. COMSOL is having a stick and bounce model for that, but it is not suitable for my case. Is there a way I can...

23 December 2020 5,883 1 View

Where can I get SAR and Landsat dataset for floods in india?

I am in need of flood satellite images (both SAR and Landsat). Where can I get these images for floods in specific. Is there any archive which specializes in flood related satellite images?

20 December 2018 9,260 9 View

Is modulus of rigidity which is also refered to as shear modulus G different in different directions?

Gxy, Gyz, Gzx are different or they are all the same and my notation makes no sense for a given material.

07 January 2018 3,871 7 View

Can get negative reflection for thin film sample using uv vis spectroscopy?

Is it correct to get negative reflection while using R=1-(A+T)is it correct if so kindly explain?

02 January 2018 8,939 5 View

How to calculate reflectance using absorption or transmittance spectra?

How to plot reflectance graph from absorption/transmittance graph taken from UV-Vis spectrophotometer for thin film?

29 December 2017 5,712 6 View

How to calculate atomic weight percentage(at.wt.%)?

How to calculate atomic weight percentage for chemical. I don't know kindly help

20 December 2017 2,689 12 View

What is the reason for seedlings tip drying in the tissue culture conditions?

Dear Sir/Madam, I am growing citrus seedlings of different crosses in MS culture medium both liquid and solid. Growing conditions are 27 degree Celsius and light period 8h light and 16h dark....

22 August 2017 6,249 6 View

How can we Show that a set of axioms are independent?

01 May 2016 2,293 1 View

Please suggest a protocol for performing Annexin V FITC/PI staining assay on Hela cells

I am trying to perform Annexin V FITC/PI staining on hela cells to study apoptotic effect of some synthesised compounds. I'am using BD bioscience kit and they have protocol for adherent cells...

22 January 2016 8,759 2 View

Is it possible to fractionate the crude extract of protein using chromatography?

01 July 2014 8,720 4 View

Why the nucleic acid gel melted after running for 30min?

Hi all, I proceed with nucleic acid gel electrophoresis recently several times, but a wried phenomenon is they always melted after running over 30min. My gel concentration is 1% percentage...

22 February 2021 9,896 3 View

Sound transmission loss (Acoustic Metamaterial)?

My design contains three parts. A silicon rubber membrane is placed between upper and lower part. I want to calculate sound transmission loss by using comsol Multiphysic. There are lots of...

05 February 2021 466 4 View

Can you use the Normalized Difference Soundscape Index (NDSI) as a measure of anthropogenic noise?

I am working on a past project in which I recorded the ambient noise in each cardinal direction for a minute but I did not obtain the LEQ sound pressure levels at the time I was recording the...

29 November 2020 8,138 2 View

How to make a dispersion curve using ANSYS?

I try to make a dispersion curve using ANSYS and have some problems. I am beginning to simulate acoustic wave propagation in a simple mass-spring chain of metamaterial and have no idea for...

11 November 2020 7,803 1 View

In online GC-FID/TCD connect to flow reactor, why I am getting instable peak area in FID in every injection under same conditions?

We have online GC-FID and GC-TCD (Mod: 2014) connected with flow reactor system. This GC-FID/TCD is connected to a gas line coming from flow reactor system which I used for cascade reaction. In...

11 November 2020 4,999 6 View

Is it safe not to remove contaminated concrete though mechanically sound if sacrificial anodes would be installed at the corner of the patch?

During repair of concrete structure, I understand that it is not necessary to remove mechanically sound concrete though contaminated while repairing a structure if Impressed Current Cathodic...

08 November 2020 6,861 3 View

What is the recommended software to analyse sound recordings from Audio Moth?

Hi all, I'm currently undertaking a research project for my dissertation and will be using Audio Moth to recording vocalizations from Bleeding Heart Doves. Their calls are relatively low at 500...

08 November 2020 9,069 3 View

How to do a Repeated measures analysis with not normal distributed data?

I have results from a listening test in 12 sound environments which are build up out of 3 room properties and 4 occupancy rates. Since the sound samples were often intelligible, subject scores...

04 November 2020 5,423 11 View

Acoustic shock wave from spark?

I'm working with an application where I'd like to detect a short sound from a distance up to 100 m. An ultrasonic chirp has been unreliable so far. I was contemplating the use of the snap of an...

30 September 2020 8,627 4 View

How does a Bi-Static FMCW radar detect a Zero Doppler target?

27 September 2020 8,370 6 View