This document discusses using Internet of Things (IoT) technologies in physics education and research. It describes using sensors to study simple pendulums and creating an IoT-enabled double pendulum experiment. Citizen science projects detecting cosmic rays with smartphones and Raspberry Pi kits are also summarized. The document envisions expanding IoT applications to measure radiation and particles, helping more people experience and learn physics concepts.

1. IoT and Physics
from a simple pendulum to cosmic rays
MILAN MILOŠEVIĆ
DEPARTMENT OF PHYSICS
FACULTY OF SCIENCE AND MATHEMATICS
UNIVERSITY OF NIŠ, SERBIA
Workshop on Open Source Solutions for the Internet ofThings (smr 3128)
ICTP,Trieste, Italy, July 7th, april 2017
fizika.pmf.ni.ac.rs svetnauke.org

2. 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 radion
field, 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.

3. It all started with a BIG BANG ☺

4. Big Bang... the real on

5. Science, Education and
Science Communication
World of Science (svetnauke.org)
Southeastern European Network in
Mathematical andTheoretical Physics
www.seenet-mtp.info
System administrator
Owner, Editor-in-chief

6. Science communication
Science fair (2017)
Gymnasium Svetozar Marković, Niš
Students of the “High school class for students
with special abilities in physics”
Department of Physics, Nis

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

8. 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 Cupic
Supervisor: Prof. Dr. DejanAleksic

9. Simple Pendulum
• Lagrangian function:
• Euler–Lagrange equation
• Pendulum
• Equation of motion
T V 
0
i i
d
dt q q
  
  
  
 
 
2
21 1
2 2
1 cos
T mv m l
U mgy mgl


  
  
sin 0
g
l
  

10. Standard Model Lagrangian

11. Simple pendulum and IoT
• Make a pendulum with a sensor (or a smart phone)
Lot of references:
• P.Vogt, J. Kuhn,The
PhysicsTeacher 50, 439
(2012)
• R. Peters, S. Lee,
arXiv:0904.3070
[physics.gen-ph]
• etc

12. Double Pendulum (chaos)
   2 2 2 22 2
1 1 1 2 2 21 1 2 2
1 1 2 2, .
2 2 2 2
m x y m x ym v m v
T 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
       
       
       
     

13. 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)

14. Science Communication
• Astronomy ☺

15. Future…
• IoT in (real) physics
• Measure UV radiation
• Measure radioactivity
UVB and UVA
https://learn.sparkfun.com/tutorials/ml8511-uv-sensor-hookup-guide
Radiation Sensor Boardwith J305β GeigerTub
https://www.cooking-hacks.com/documentation/tutorials/geiger-counter-radiation-sensor-board-arduino-raspberry-pi-tutorial/

16. 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.

17. 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/

18. 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

19. A dream…

20. Thank you / Hvala / Хвала ☺
Serbian
latin / cyrillic
Milan Milošević
Department of Physics
Faculty of Science and Mathematics
University of Niš, Serbia
mmilan@svetnauke.org
www.svetnauke.org
facebook.com/mmilan
linkedin.com/in/mmilann/
www.seenet-mtp.info