How to estimate 2SLS with different instruments for different endogenous variables?

To be specific, I want to conduct an IV regression in stata with the following three equations. EQ1: Y1 ~Y2 Y3 X EQ2: Y2 ~ Z1 EQ3: Y3 ~ Z2 Both Y2 and Y3 are endogenous. However, Z1 and Z2 are...

23 February 2021 6,266 3 View

Hi, Good day! Do you have related studies about my title, "Factors Affecting the Senior High School Students' Stress Tolerance in Problem Solving"?

I am new researcher. I want to learn more and I need your help. Thank you.

04 February 2021 6,834 4 View

How to preserve wet fungus spore ?

I need to preserve broth culture of wet fungus spore for my further research. Can any one suggest me any solution.

18 January 2021 4,756 2 View

How to design a PI controller for fourth-order transfer-function ?

Hey! I'm in the work of designing a controller for a zeta converter, it is a fourth-order system. I tried ways like the Ziegler-Nicols method, Root locus method using Control System Designer in...

29 October 2020 4,054 3 View

How to cite the results from Gallup Strengths Finder Assessment?

In my report, I included the ideas from the results given to me by the Gallup Assessment, but I am confused on how I will cite the website using APA 6th edition and what is the format for both the...

12 October 2020 5,396 2 View

Is it possible to get more than one final optimal solution using TOPSIS decision-making method in multi-objective optimization problem?

So is it possible to get more than one final optimal solution using TOPSIS decision-making method in multi-objective optimization problem? If there is the possibility of getting more then one...

01 September 2020 7,680 9 View

How are latent means and observed composite means different?

I know that they are different but I am kind of at a loss for how to explain the difference, but I may be overthinking it. In simple terms, my understanding is that a latent mean(intercept) is an...

19 August 2020 8,857 4 View

Is there any chance of a person getting reinfected by COVID-19 Virus?

Is there any available data that shows reinfection by COVID-19 Virus? What is the immune status against COVID-19 virus of an affected person, once he/she gets cured?

01 June 2020 190 12 View

Is simulation technology has any role in laparoscopic surgical training ?

Minimally invasive surgery technique has taken the central role in modern surgery specially in abdominal surgery. So, every surgeons need to get trained into the field of minimally invasive...

25 May 2020 6,412 9 View

How to model water acidification using CO2 and acids ?

Hello, I am trying to model the amount of CO2 vs mineral acid (HCl, H2SO4) needed to acidify water with various alkalinity conditions. It would be helpful if I can get some suggestions on the...

04 May 2020 9,798 8 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

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

Can I ask did any good platform or journals for learning the calcluation on the reference governors and command governor?

Recently I face some problems with the mathematical ( calculation) on the reference governor and command governor, so I need some help from you all to get which platform or journal can let me...

23 February 2021 7,746 2 View

Help with culturing monolayer of human brain microvascular endothelial cells (hBMEC)?

I've been having a hard time forming an endothelial monolayer with good tight junctions. The person who trained me on the culture of endothelial cells worked mostly with mouse BMEC, and he used...

22 February 2021 8,253 1 View

Special issue on PLS-SEM in Mathematics. Are you interested?

21 February 2021 5,601 3 View

What is the better software for approximation of 3D surface with equations?

I have a massive of x, y, z coordinates of 2D surface in 3D space, which builded in Ansys HFSS or AutoCAD. How can I get the analitical aproximation of this surface by formulas?

21 February 2021 3,444 7 View

How can I obtain a sine function along a path with known equation?

I have a symmetric airfoil with known equation. Now a sine function passes along the airfoil equation like following figure. I want to find the sine function in (x,y) coordinate system.

17 February 2021 1,594 12 View

Does learning mathematics exclusively improve cognitive abilities?

Teaching Mathematics at school to all students is commonly justified by the opinion that it improves their problem-solving skills and "makes them smarter" (whichever measure is implied by this). I...

15 February 2021 7,391 7 View

Can we help fellow mathematicians get free ?

https://terrytao.wordpress.com/2021/02/08/a-statement-from-mathematics-department-faculty-at-stanford-and-mit/ Terry Tao blogged about this unfortunate event. Kindly share among Mathematical...

08 February 2021 1,055 3 View

Theoretical computer virology ? is still alive ?

HI Everyone! I am asking to know by you, expert in cybersecurity and mathematics, if Computer virology (the one of Cohen and Andler) is still an active field of research. That research made in...

08 February 2021 7,613 6 View