I am looking for researchers working on basis atomic and molecular calculations ?

More Abderrahmane Reggad's questions See All

What is the difference between an alloy and a solid solution ?

e.g. the difference between AlxGa1-xAs (ternary alloy) and (AlAs)x(GaAs)1-x (solid solution)? - From thermodynamic point of view? - From crystallographic point of view ? - From growth process...

19 October 2020 2,194 8 View

I want to ask, how we modeling the water in soil with Abaqus ?

I want to ask about how to model soil-water in Abaqus program? Thank you

21 April 2020 3,392 4 View

What are the most relevant theories in the study of anti-corruption policies/efforts?

In exploring the role of civil society organizations in the fights against corruption (public and private, grand and petty) I could not find a comprehensive theoretical framework that can be...

06 April 2020 8,696 4 View

There are any free (not commercial ) Software of Geotechnical Modelling ?

free used Software of Geotechnical Modelling

24 October 2019 4,680 6 View

Does the large salinity of the soil affect the work of groundwater detectors by electric prospecting?

I found in my field study to search for groundwater by electric exploration that when the topsoil is saturated with salts, the results of the search for groundwater are inaccurate and sometimes...

16 October 2019 6,239 3 View

Can I translate few pages "6" from a book and publish it without getting approval from its author?

I'm reading this book and I'm really interested in translating few pages from a section of the book into my mother tongue language. Now i have already started but then i realized maybe it is not...

07 March 2019 2,723 5 View

Any SDN solution for heterogeneous Wireless Sensor Networks ?

Hello everyone, I'l searching for a SDN solution to assure interoperability between sensors connecting on Zigbee and Bluetooth. I'll appreciate your help. thank you :*

11 April 2018 2,835 2 View

What is the procedure for calculating the size of the particle to the powder?

what is the relationship between the optical and magnetic properties?

19 January 2015 7,759 2 View

How Relativistic effects is one reason for lanthanide contraction?

The Lanthanide contraction which is the decrease in ionic radii of the elements in the lanthanide series from atomic number 57, lanthanum, to 71, lutetium, is due to poor shielding of the 4f...

01 March 2021 2,272 4 View

Why initial concentration of Pb not the same as calculated one when testing using AAS?

I am currently doing research on the adsorption of heavy metal using magnetic reduce graphene oxide. I use AAS to determine the concentration of the heavy metal. I prepare the Pb solution with...

26 February 2021 9,580 4 View

How to search for crystal structure for material with atomic position labelled?

I am using the crystallographic open database and materials project to search for cif file but the exact structure is not mentioned or how can I deduce that the given structure and atomic position...

23 February 2021 6,723 2 View

Is this the write procedure for acid digestion of soil for heavy metal analysis using AAS?

How to do acid digestion of soil sample with 3:1 aquaregia in an open vessel?

23 February 2021 3,053 7 View

What are the potential shell well and atomic solvation parameters for the boron atom?

I have a protein-ligand docking project. The ligand contains boron atoms that are not detected by Autodock software. To solve this problem, it is necessary to introduce the boron atom to...

19 February 2021 1,236 1 View

Is nanotechnology part of materials science? Is it possible to obtain Pico technology and move from hypothesis to application?

Pico-scale This is three orders of magnitude smaller than a nanometer (and thus most nanotechnology) and two orders of magnitude smaller than most chemistry transformations and measurements. Pico...

18 February 2021 4,540 5 View

How to calculate the Atomic Polar Tensor using DFT ?

Dear friends, I am a beginner at DFT calculation. I have done a structure optimization using DFT- B3LYP/6-31G*, Nevertheless, I don't know How to calculate the Atomic Polar Tensor (APT) in...

17 February 2021 9,082 3 View

Please how can i write a proposal on the methodolgies of AAS to determine heavy metalsin water?

Please I want to write a proposal on the methodologies of AAS to determine heavy metals in water. please any link can help.

08 February 2021 3,587 7 View

Does dilution affect the metal concentration (ppm) in Atomic absorption spectroscopy analysis?

Analysis conducted using AAS to determine the presence of tungstate within the sample. The tungstate concentration of the sample was around 1100 ppm but after diluting 2 ml of sample to 5 ml, and...

26 January 2021 6,242 4 View

SEM/TEM/AFM which analysis should be performed for spray dried solid lipid nanoparticles?

Can anybody please suggest which analytical technique would give me the best result for the size and shape of solid lipid nanoparticles SEM or TEM or AFM. The nanoparticles are synthesized by...

21 January 2021 7,991 6 View

Richard Lewis

I have been working on calculations relating to the hydrogen atom and the cause of the quantisation of the electron and the nature of the bond between two hydrogen atoms:

Data Prerecording of Conference Presentation on the Unification of Physics

Preprint The Unification of Physics (June 2021)

Richard