I want to know better some brazilian physicists and their work.
Ok. Thanks a lot
Why can a cat live if it fall with terminal velocity and it is so hard when it's moving near terminal velocity, but in accelerated motion? I know the net force is equal zero. How can I explain to...
04 May 2016 7,542 2 View
I work with paradidactic texts to teach Physics. The Physics is applied in some situations near to daily of the students. What different forms (excluding the traditional form: calculus and...
02 March 2016 3,144 3 View
If we map as a continuous motion an ionising electron (beginning its journey at n=1) in an H atom, a specific hyperbolic spiral appears (see animation). When we solve this spiral formula, we find...
07 August 2024 5,343 2 View
Let's say we have a standard, regular hexagonal honeycomb with a 3-arm primitive unit cell (something like the figure attached; the figure is only representative and not drawn to scale). The...
07 August 2024 1,937 1 View
I am following Hainmueller, Hopkins, and Yamamoto's (2014) paper for my randomized conjoint experimental data analysis. The link to the paper is provided below. I received a comment from the...
02 August 2024 4,406 0 View
Is there a straightforward way to conduct a sensitivity power analysis for a Kendall's Tau correlation? I was considering using the sensitivity setting and "Correlation: point biserial model" test...
28 July 2024 6,133 8 View
Consider the case of negligible gravity but there is an accelerating reference frame. Its origin traces out a trajectory, or world line, seen in some inertial reference frame. The Lorentz metric...
24 July 2024 1,608 15 View
Dear all, I have a user written estimation code based on the paper dynamic panel data estimations with fixed effect by Galvao(2009). I have seen many papers using this method and pvalue, standard...
22 July 2024 4,588 1 View
Exism movements since BREXIT 2016 have been described as driven by emotions leading to the idea of Emocracy/Emocracies, but as the social discontent that is usually displayed after exism movements...
16 July 2024 3,701 1 View
We have conducted a systematic review to investigate the effectiveness of a treatment for a psychological disorder. We aim to report effect sizes and p values of the reviewed studies but one study...
10 July 2024 7,186 4 View
students already took 1. numerical methods 2. programming language 3. Probability and statistics
09 July 2024 6,271 3 View
Hello dear colleagues and professors Please what is the recommended type of pseudopotentials for QE? ultrasoft or norm conserving?? And from where get all types of pseudos (us, nc, pbe,...
09 July 2024 9,541 5 View