The exhibits

This is my effort to keep the Slide Rule and the Mechanical Calculator alive.

For this I organize exhibits where slide rule, pascaline and mechanical calculators can be tested by the public.

I think it is useless to teach maths without explaining how calculations were performed before the digital era.

To complete the overview of the ancient technologies, I also prepare exhibits on astronomical navigation and the history of communication.

For a better vision of mathematics my exhibits aims to:

arouse curiosity about slide rule and mechanical calculators;
illustrate their history and use;
demonstrate the need to use computers critically.

To avoid boredom I organize dynamic exhibits, focused in teaching how to use the instruments.

From 2008 I show every year at Cagliari Festival Scienza, an Italian science fair sponsored by the U.N.E.S.C.O., a brief history of computing. The opportunity to try the calculators has made the difference and I have always more than 1,500 visitors. The exibits are now suspended due to other commitements.

As a static exposition of scientific instruments cause just a mild curiosity, I make a dynamic exhibit focused in quickly teaching how to use them. Math on the move! Since 2008 I show every year at Cagliari Festival Scienza, an Italian science fair sponsored by the U.N.E.S.C.O. with more than 14,000 visitors, a brief history of computing.

The best compliment I got from a group of young girls who advised everyone: "go to see the old computers, they are so cool". An unexpected success for a boring topic

Was there life before computer? was one of 10 educational projects that have represented Italy at the Science on Stage Europe Festival 2013 and "Old Calculators & Democracy" do the same in 2015.

Cagliari Festivalscienza 2010

Somebody write notes

Cagliari Festivalscienza 2010

Crowd

Cagliari Festivalscienza 2011

Nomographs helps the boys to understand logarithms

Nicola Marras at Cagliari Festivalscienza 2010

Incredible, many youngsters!

Cagliari Festivalscienza 2011

Youngs learn at the fly

Slide rules at Cagliari Festivalscienza 2012

Teaching to the teachers

Nicola Marras: Lesson of nomography

Lesson of nomography to children

Aritmografi e pascaline

Practice with pascaline

First Real Time Communication

The presentation and the posters of the exhibit

The concept of real time communication begin in '1800

The culture of instant information sharing was born in the 1800s. Back then, news and stock trade transactions would have already traveled in real time over 650,000 km of telegraph network.

In the last century you could chat online by means of HAM radio, a network entirely built by devoted hobbyists. Access to HAM radio wasn't available to everybody; good technical skills and motivation were required.

When we re-discover these technologies, we should ask ourselves: how our present world will be viewed in the future?

The exhibit, usually held in the context of Cagliari Festival Scienza, is aimed at showing how real-time communication has existed for almost 200 years and its probable developments.

Cagliari Festival Scienza 2017, folla