How seriously should we take the UFO sightings?

More Jean-Pierre Jost's questions See All

World production of plastic is 359 millions T/year.What could be the best biodegradable product to replace plastic?

Mediterranean get on average 600 000 T plastic/year and we consume some 5 gr plastic (micro- plastic particles) per week, the equivalent of a credit card

05 June 2019 2,483 5 View

Are the climatic changes influencing the migration patterns of birds ?

Some birds do not migrate anymore or do not go so far south. Have you some examples to be cited thank you for your answers

04 May 2019 2,616 12 View

Do you think that there is a lack of critical information about transgenic plants (food) among the general public ?

If yes, how to get about this problem? How to inform the consumer about the benefit and risk of "transgenic" food ?

03 April 2019 4,144 12 View

Many people are against transgenic plants, do you think that we can nourish an increasing world population without them?

Should you not want them, what are the realistic alternatives?

03 April 2019 8,289 23 View

Do nanobeads represent a serious danger for our health ?

Agriculture, industry and medicine make use of nanobeads. Nanotechnology is an important emerging industry with one trillion US dollars /year.

02 March 2019 8,607 5 View

Body language, do human pheromones play a role?

"some scientists suspect that the armpit could be sending all kind of signals from casual flirtation to sounding the alarm"... Scientific American, Mind Volume 25, issue 3, may 2014

01 February 2019 1,534 1 View

Human brain can take command of rat brain. What do you think about mind control?

Chinese scientists connect a human brain and a "rat cyborg" brain together allowing a wireless mind control of the rat's movements.... published in Nature's Scientific Reports on Feb 4 2019.

01 February 2019 6,825 3 View

What concrete evidence do we have about the toxicity of the herbicide Roundup (glyphosat) on humans ?

In some countries we find a correlation between the incidence of cancer in humans and the use of the herbicide Roundup.Do we have concrete facts about a cause-effect relationship between these two...

01 February 2019 3,930 5 View

Should you decide to decrease drastically CO2 emission within the next 10 years what would be your priorities, what would be the economic consequence?

Where should you start and how: road and air traffic, burning of coal and oil. Offering alternatives at an affordable price? But certainly not by increasing the taxes----

01 February 2019 5,544 3 View

Arable land is diminishing while population is incresing, is the vertical agriculture a good solution to increase the production of vegetables?

I think that such a solution for the production of vegetables could be of benefit in peri-urban areas What is your opinion or do you have other suggestions?

01 February 2019 6,953 1 View

What is the procedure to determine the permeability of concrete?

can anyone help me in this, it will help me with my research work

01 March 2021 834 3 View

Which one is easier and better at modeling slender masonry structures? ANSYS or ABAQUS?

I need to model masonry and reinforced concrete minarets for my MSc thesis. Which one is easier and better at modeling slender masonry structures? ANSYS or ABAQUS? (Or any other program for just...

01 March 2021 736 3 View

Apart from Nanosilica and CNT's what are the other nanomaterials readily available to use in concrete mixture?

Nanotechnology in concrete materials

01 March 2021 3,379 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

Concrete compressive strength databases?

I am looking for datasets similar to this one: http://archive.ics.uci.edu/ml/datasets/Concrete+Compressive+Strength I am looking for concretes with different types of aggregates (Recycled,...

27 February 2021 6,801 3 View

LEDs on Vis Light photo degradation of MB water sol via N doped TiO2 in a mini flume?

Good day to all, I have no experience with light emitting diodes. I am building a glass mini flume to demonstrate the photo degradation of Methylene Blue in water running over self cleaning...

26 February 2021 4,026 5 View

What is the best way to calculate the angles of twist for concrete columns subjected to torsional moment using finite element software?

In Finite element software like ANSYS , there is difficulty in obtaining direct results of twisting of concrete members because SOLID65 which is the unique element designed to represent concrete...

26 February 2021 3,806 2 View

Compute for the total volume of concrete needed for the concrete pouring of the foundation including its column up to NGL only as shown in the plan?

Looking for the quantity of cement, sand, and gravel of footings and columns. Thank you!

25 February 2021 3,092 2 View

Best FE Program for Concrete Strengthened with FRP Sheets?

Colleagues, I have been using ANSYS to model concrete strengthened FRP sheets, but less than happy with it. Any has recommendation for efficient, easy to use FE program for modelling concrete...

22 February 2021 7,528 3 View

Is there a Constitutive model for concrete with Sea-Sand?

Hi I am running a simulation in Abaqus for a concrete beam. Its fine aggregate replaced with sea-sand. I was wondering if I could find studies that measured the ultimate strain of concrete made...

22 February 2021 6,409 2 View

Om Prakash Chhangani

In this technological driven world when US has so many satellites tracking of UFO is not difficult but the scientific way of tracking is not in evidence.

Therefore, the existence of UFO is just imagination and a scientific fiction.

Aryan Shahabian

If we knew them, they wouldn't be called "Unidentified" Flying Objects. As soon as you know them, they'll become Identified Flying Objects.