Physics: Why do we describe light by referring to its wavelength, but microwaves and radar pulses by referring to their frequency?

In physics, the description of the properties of light generally refers to its wavelength (nm), while in the range of microwaves and radio waves we refer to the frequency of a signal (e.g. kHz or...

03 March 2021 1,682 3 View

Can we model an Arima (0,0,0)(0,0,0) with pulse intervention?

Hello, i got trouble when i try identify a intervention analysis about disaster impact on night time light intensity. i have 65 month data from January 2015 until may 2020. based on...

06 February 2021 10,018 4 View

Can anyone elaborate the method to measure arterial pulse wave velocity in research studies involving Sphygmocor??

Sphygmocor is the tonometry based instrument which is used to record generally radial pulse waves and then calculating various variables like Augmentation Index, SEVR etc. It is also used to...

02 February 2021 7,546 3 View

What are some properties of a proton in a static B-field?

I have some basic questions about the behavior of a charged particle in a static B-field. 1. Without a B-field, the particle has spin, with random orientation and spin frequency. a) What...

24 January 2021 1,389 3 View

How to improve my BrdU immunostaining?

24 January 2021 414 3 View

How to reconstruct a Lamb wave by a series of pulses superposed?

Lamb wave is useful for solid structure health monitoring, and it consists many modes. Unlike ultrasonic bulk wave, when given a pulse excitation (for example, 5-cycle sinusoidal pulse), only...

08 December 2020 5,440 8 View

MPC for grid connected inverter with LCL filter generates dominant 3rd & 5th order harmonics. solutions to eliminate them?

Hi, I'm trying to design a three phase grid feeding inverter. Haven't used a transformer and grid neutral is grounded. LCL filter is being used. Id* and Iq* are references for grid current. These...

23 November 2020 6,562 3 View

Could you help with a doubt regarding UDF velocity inlet profile with multiphase mixture (Ansys Fluent)?

We are two undergraduate students seeking for help!!! We are trying to simulate a laminar flux through a 3D pipe (25 cm long, 2 cm of diameter) consisting of a multiphase flux (air and water). We...

23 November 2020 3,918 3 View

How can I simulate electroporation for a bilayer?

hi I am trying to simulate electroporation for a bilayer containing 10% cholesterol on GROMACS. I have read lots of articles but the only parameter that they have talked about was the electric...

15 November 2020 7,602 2 View

How can I run movestay command?

I used the following command: movestay (lnTotalincome = HHsize h1sex TLU yrcop tland tprod) (ccert = HHsize h1sex TLU yrcop tland tprod), select (train = h1edu) But this doesnot work and I get...

01 November 2020 1,065 2 View