IoT and Physicsfrom a simple pendulum to cosmic rays

MILAN MILOŠEVIĆ

D E PA R TMENT OF P HYSI C SFAC U LTY OF SC I E N C E A N D MATHE MATI C SU N I V ER SITY OF N I Š, SE R B I A

Workshop on Open Source Solutions for the Internet of Things (smr 3128)ICTP, Trieste, Italy, July 7th, april 2017

fizika.pmf.ni.ac.rs svetnauke.org

Inflationary Cosmological Models With Tachyon And Radion Fields

Inflation(the GOOD one, in Cosmology)

Abstract: A popular class of the inflationary cosmological models is based on an introduction of a scalar field with non-standard tachyonic Lagrangian of the Dirac-Born-Infeld (DBI) type. A potentially fundamental role of the tachyon fields in the braneworld cosmology was proposed by A. Sen. Research in this PhD thesis is motivated by Randall-Sundrum (RSII) cosmological model. The main objective of the research is to formulate and solve a numerical inflationary model with DBI-tachyon field and RSII model with an additional radionfield, as well as to compute observational parameters. Obtained results are in a good agreement with the real astrophysical data and provide a better understanding of the role of strings and branes in modern cosmology. The results indicated that role of radion in an initial RSII setup is less important than expected.

It all started with a BIG BANG ☺

Big Bang... the real on

Science, Education andScience Communication

World of Science (svetnauke.org)

Southeastern European Network inMathematical and Theoretical Physicswww.seenet-mtp.info

System administrator

Owner, Editor-in-chief

Science communication

Science fair (2017)Gymnasium Svetozar Marković, Niš

Students of the “High school class for studentswith special abilities in physics”

Department of Physics, Nis

Education

Students of the “High school class for students with special abilities in physics”Gymnasium Svetozar Marković, Niš

IoT in Education?

• Subject: Modeling in physics• Mostly theoretical

• Numerical models, simulations

• Programming (in Pascal/Lazarus)

• Now• A little bit of IoT in Electronics

• Future• IoT in Physics?!?!

Damjan CupicSupervisor: Prof. Dr. Dejan Aleksic

Simple Pendulum

• Lagrangian function:

• Euler–Lagrange equation

• Pendulum

• Equation of motion

T V

0i i

d

dt q q

221 1

2 2

1 cos

T mv m l

U mgy mgl

sin 0g

l

Standard Model Lagrangian

Simple pendulum and IoT

• Make a pendulum with a sensor (or a smart phone)

Lot of references:

• P. Vogt, J. Kuhn, The Physics Teacher 50, 439 (2012)

• R. Peters, S. Lee, arXiv:0904.3070 [physics.gen-ph]

• etc

Double Pendulum (chaos)

2 2 2 22 21 1 1 2 2 21 1 2 2

1 1 2 2, .2 2 2 2

m x y m x ym v m vT V m gy m gy

2

1 2 1 1 2 2 2 1 2 2 2 2 1 2 1 2 1

2

2 2 1 1 1 2 1 1 1 2 2

cos sin sin 0

cos sin sin 0.

m m l m l m l m m g

l l l g

Foucault pendulum

• Simple device conceived as an experiment to demonstrate the rotation of the Earth (1851 - the first simple proof of the rotation)

• Coriolis force (an inertial force, acts on objects that are in motion relative to a rotating reference frame, pseudoforce)

Science Communication

• Astronomy ☺

Future…

• IoT in (real) physics

• Measure UV radiation

• Measure radioactivity

UVB and UVAhttps://learn.sparkfun.com/tutorials/ml8511-uv-sensor-hookup-guide

Radiation Sensor Boardwith J305β Geiger Tubhttps://www.cooking-hacks.com/documentation/tutorials/geiger-counter-radiation-sensor-board-arduino-raspberry-pi-tutorial/

Project DECO

• https://wipac.wisc.edu/deco/

• Citizen science project that enables users around the world to detect cosmic rays and other energetic particles with their cell phones and tablets.

• Digital camera sensors detect muons in much the same way that they detect photons when we take a picture of friends or a landscape.

Project DECO - events

• A straight "track" shape indicates a muon produced by a cosmic ray

• A "worm" shape indicates an electron produced by a radioactive decay that either produced an electron directly or produced a gamma ray that then knocked loose an electon

• A "spot" shape indicates an electron or gamma ray

https://wipac.wisc.edu/deco/

Cosmic Pi

• http://cosmicpi.org/

• A group of people from CERN is using their spare time to build Cosmic Pi, a cosmic ray detector based on a Raspberry Pi.

• Prototype http://www.ohwr.org/projects/cosmic-pi

A dream…

Thank you / Hvala / Хвала ☺

Serbianlatin / cyrillic

Milan Milošević

Department of PhysicsFaculty of Science and MathematicsUniversity of Niš, Serbia

mmilan@svetnauke.org

www.svetnauke.orgfacebook.com/mmilanlinkedin.com/in/mmilann/

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