Who is a principal investigator when postgraduate students conduct research, student or guide of the students?

It has been seen that guides who supervise and facilitate postgraduate students to complete the research study, claim to be the principal investigator or the author of the study. Although the...

12 October 2020 4,893 28 View

Are there any spectral irradiance transpositional models in use?

I am working with the spectral irradiance on different planes. The readings are available on a global horizontal and plane of the array of 45 degrees. I have a PV module inclined vertically and I...

06 October 2020 4,673 2 View

Can anyone help me to run a python code (TimML) to study the radial collector wells developed by Porf. Mark Bakker?

I am trying to understand the role of horizontal wells in the productivity of large diameter wells in semi-arid regions. The TimML code developed by Prof. Bakker is an analytical element model...

09 April 2020 3,079 3 View

What is the difference between variation in displacement and virtual displacement?

Also when referring to variation in the work (virtual work), we use virtual rotation not rotation variation? Thanks.

05 April 2019 3,332 10 View

Could I model a reinforced concrete member as a wire element in ABAQUS?

In shell element I could define rebars layers to define reinforcement, but could I implement rebars in wire element? Thanks

26 March 2019 2,223 8 View

How to implement plastic hinge with capacity interaction between axial load and bending moment in ABAQUS?

In 3D frame analysis, using elastic element with plastic hinge at nodes accelerate the solution time instead of using distributed plasticity. But most plastic hinges include interaction between...

26 March 2019 2,450 3 View

What is the allowable lateral acceleration of tall building due to wind load?

People feel uncomfortable in the upper stairs of the tall building when the building move laterally due to wind load or to be accurate the lateral acceleration of the building. Is their any...

21 March 2019 9,055 9 View

At implementing damage model, How could I get the effective stress-strain curve or damage parameter from true stress strain curve?

Most experimental results include true strain curve. How could I experimentally or theoretically reach effective stress strain curve or damage parameter for damage model? Thanks

01 March 2019 9,017 11 View

Does anyone read about using multi-directional cracks in 3D modeling of concrete?

I encountered using multi-directional cracks model in 2D elements, but could it be used for 3D concrete elements?

23 February 2019 384 14 View

What is the shape of loading and unloading curve of concrete in tension?

Also how could I identify the pre-transition and post-transition parts of strain increment?

21 February 2019 1,135 5 View

Could you recommend any books about Number Theory?

Beginner level books. High level books. Analytical Number Theory. Algebraic Number Theory. Combinatorical Number Theory. Books about partitions. Books about primes.

03 March 2021 7,174 5 View

Arena simulation - how do i model the following model in ARENA (see description) (new to ARENA)?

Hello, I'm fairly new to ARENA and I have the following problem: I have two queues in which, in each queue, a different order type arrives (both having an arrival rate of exponential 10). Order...

02 March 2021 2,431 3 View

What is Flat Lens Antenna?

28 February 2021 5,433 3 View

Can impedance of antenna be less than 50 ohms?

I am simulating helix antenna in hfss, right now, giving excitation with 50 ohms port. When I see the results of Z parameter (real). It shows lower than 50 ohms. Do not understand, if it can be...

27 February 2021 4,218 7 View

What are the application of Fixed points thoery in Chemistry.?

It is said that fixed point theory has lot of applications not in the field of mathematics only but also in various areas. So I am looking for applications in Chemistry only..

26 February 2021 3,533 1 View

How to model Supercritical water gasification (SCWG) process in Homer software?

Hi everyone How to model Supercritical water gasification (SCWG) process in Homer software?

25 February 2021 4,075 1 View

How to interpolate from a time-series database ?

Hi, I am having trouble with a problem, in the field of Optimal Control and the generation of optimal time-series. Let's consider a system, whose dynamics are represented by dx/dt =...

24 February 2021 9,105 2 View

How to constrain genetic algorithm input u?

My real system (buck converter) can only take an input of 0 to 1 (duty ratio) and I need to constrain the system so the controller action keeps within this bounds. How can I do this? The code for...

22 February 2021 2,125 3 View

Helix antenna coupling problem?

Dealing with a helix antenna, made with flexible material and not rigid like using a PCB board or wire. At the beginning of the helix is too close to the ground plane, causing coupling. How can I...

21 February 2021 4,453 3 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