What is the correct scientic reason for Anamalous Behavior of water from 4 deg C to 0 degC ?

Water gets solid at 4 degree C and again expands till it freezes at 0 deg C . Why this behavior ? Many make statement of Hydrogen Bonding and high density. But such is not case with other liquids...

31 December 2018 2,193 0 View

What is the conversion efficiency of a standard GaAS based solar cell ?

I intend to use solar cell for my work in an Agricultural Farm. conversion efficiency = input solar radiation on the solar panel of 1 sqm /output from the panel in electrical watts what best...

11 December 2018 8,000 0 View

What is the best conversion efficiency of commercially available solar cell in USA and in India?

It is required to use Solar panel of 2m x 2m in a farm to produce DC electric output for use. What best solar cell Ishould choose so that I get best conversion efficiency from solar radiation...

11 December 2018 8,812 0 View

What is the relation of surface velocity to overall discharge of water flow in an open channel flow including rivers in spate (floods)?

I had designed an Optical Current meter with my senior Guru and we measured surface velocity at many places including Ganga at Patna. This project has won award from CWC in 1983. This has never...

31 December 2013 4,109 11 View

What is the range of acoustic telemetry. Can this be used in wireless sensor networking instead of very high frequency transmitters?

It seems acoustic telemetry has low frequency than rf or microwave. This may not harm the crops in wsn for agriculture farms.

31 December 2013 2,230 1 View

Why does plastic fiber have high sensitivity in displacement measurements when LASER or LED is used in visible spectra?

This was seen when I did a project and demo for a student. The displacement is also larger, source was typically red LED ( at 660nm-approx)

31 December 2013 9,217 1 View

Spectrum anlyser and FFT analyser

What are the exact differences between these types of equipment and their applications

05 June 2011 1,565 1 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

what is the simplest definition of ion exchange capacity

What this unit identifies for the ion exchange capacity ca. 0.92 meq. g-1. I am a newcomer in the membrane area. I just started. I highly appreciate your help

08 May 2021 0 0 View

what is the simplest definition of ion exchange capacity

What this unit identifies for the ion exchange capacity ca. 0.92 meq. g-1. I am a newcomer in the membrane area. I just started. I highly appreciate your help

08 May 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

Can we classify HV and LV lines based on line length?

I have dataset which shows the length of power lines. I need to classify the lines based on the line length. Is there a rule to classify the High voltage (HV) and low voltage (LV) lines based on...

03 March 2021 4,116 4 View

What is the production process of CaFe ferroalloys?

I looking for ferro calcium production process

03 March 2021 1,755 4 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

Which is suitable for use with Python? MySQL or SQL Server?

Which is suitable for use with Python? MySQL or SQL Server? What is your suggestion?

01 March 2021 3,422 3 View