How an unusual visual effect at the Monte Carlo casino can be obtained?

At the Monte Carlo casino, I saw an unusual advertising image. It rotated around a vertical axis and seemed suspended in the air; there was no screen behind it. The image was bright and colorful....

03 January 2021 9,119 5 View

Is it possible to make prism deviation angle minimum (as a function of incidence angle) more abrupt?

Dear Sirs, The setup for the dispersion measurement is as follows. Hg lamp, collimator, goniometer with triangular prism. We measure the light dispersion using the prism. To do so we determine...

25 October 2019 2,507 8 View

Can anybody suggest a new method of realization of the non-holographic mechanism of achromatic wavefront reconstruction?

The non-holographic mechanism of achromatic wavefront reconstruction is based on a geometric-optical reflection of reconstructing radiation from surfaces with constant phase differences between...

08 January 2018 2,966 14 View

Can a man be considered as a set of huge number of remembered automatic actions learned from society?

23 August 2017 4,940 11 View

Mass measurement from the 3rd Newton law (different forces)

Could you give references on mass measurement from the 3rd law (with different forces: gravitational, elastic, etc)? E.g. old articles by Saint-Venant.

01 January 1970 959 2 View

What is a meaning (practical and theoretical) of 1st Newton law? Can we partially check the law?

Dear Sirs, The 1st law in Newton`s principia are now understood as two statements: the determination of inertial frame reference (if F=0 then a=0 and if F is not equal 0 then there is some body...

01 January 1970 485 33 View

The 2nd Newton law test for small accelerations and BIG masses

Dear Sirs, I would like to find out more precisely whether the 2nd Newton law is valid or not in wide range of masses, accelerations, forces. Particulary I have a question whether the inertial...

01 January 1970 6,089 13 View

How do we find/construct closed system needed to use Newtons laws?

Dear Sirs, 1, 2, 3 laws of Newtons need closed system (net force is zero). How do we practically realize, create such closed system? One example. Let us look at a body motion. One can say If...

01 January 1970 970 2 View

Are there self-replication simplest mechanical models (to understand living creatures)?

Dear Sirs, I did not find this material on the internet. There are only mechanical models of some aspects of self-replication. Full mechanical model is absent. Of course it is enourmous problem...

01 January 1970 9,489 4 View

Which of the Covid-19 Vaccines would elicit the best immunoprotection and why?

I want to know which of the available Covid-19 Vaccines would elicit the best immunological response and why

02 March 2021 1,388 3 View

How vaccines of covid 19 work?

Millions ask how vaccines of covid 19 be successful and safe, its here to explain generally how vaccine of pfizer work ,mRNA vaccines teach our cells how to make a protein that will trigger an...

28 February 2021 2,723 4 View

Where can I find public datasets with Covid-19 patient information?

Hi, I'm looking for public datasets that have CT, X-ray information, or medical records for patients with Covid-19. Does anyone have suggestions?

28 February 2021 4,760 3 View

Is there any published or unpublished statistics on dropout rate (Dose1 to Dose-2) for Covid-19 vaccination in India, US, UK or any other country?

Are there any published or unpublished statistics or papers on the dropout rate (Dose1 to Dose-2) for Covid-19 vaccination in India, USA, UK, or any other country where vaccination has started at...

28 February 2021 4,237 1 View

If a given country passes mandatory 'vaccine passport rule' to go outdoors, otherwise stay at home, can it help to vaccinate all against COVID-19?

Wether vaccine passport declared not to go out of home without it may help taking COVID-19 vaccine. Can't it break individual's right to protect the community? Your comments on perspectives...

27 February 2021 5,549 23 View

How long do vaccines protect us against COVID 19?

Or will we have to get vaccinated every year, as in the case of influenza?

27 February 2021 1,048 5 View

How can we use a hybrid element in Abaqus Dynamic/Explicit for impressible materials?

Hi, all! How can we use a hybrid element in Abaqus Dynamic/Explicit for impressible materials? I have not find the choice for explicit element in Abaqus CAE. I am wondering whether it is possible...

25 February 2021 9,936 2 View

What are the patterns of human behavior that lead to COVID-19 infections?

Does data from contact tracing help in establishing patterns of behavior and social interactions that lead to infections? There are cases here in the Philippines where patients have no travel...

25 February 2021 9,002 13 View

Is anyone working on a project focused on immigrants/newcomers working in the hospitality industry and how they have been impacted by COVID?

The on-going Covid-19 pandemic has had devastating economic effects on many industries. However, few have suffered to the same extent as full-service restaurants. Numerous studies have shown that...

24 February 2021 9,496 4 View

Any Differences in COVID-19 vaccines?

Are there any differences (outside of the clinical trials that led to their EUA) observed in the rate of infection among those who have received the Pfizer vs Moderna vaccine since the mass...

22 February 2021 9,727 6 View