Demetris T. Christopoulos
Physicist
MPhil in Economics
PhD candidate in Economics
Department of Economics
National and Kapodistrian University of Athens
dchristop[at] econ [dot] uoa [dot] gr

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Academia

SSRN

Publications in refereed journals

Demetris T. Christopoulos, Extraction of the global absolute temperature for Northern Hemisphere using a set of 6190
meteorological stations from 1800 to 2013, Journal of Atmospheric and Solar-Terrestrial Physics, Volume 128, June 2015, Pages 70-83, ISSN 1364-6826, doi:10.1016/j.jastp.2015.03.009.



The above is a 10/10 Elsevier Rating publication according to My Research Dashboard:









Demetris T. Christopoulos, On the Efficient Identification of an Inflection Point,
International Journal of Mathematics and Scientific Computing , Volume 6 (1), June 2016, Pages 13-20, ISSN: 2231-5330. Retrieved from https://www.veltechuniv.edu.in/wp-content/uploads/2016/04/Paper-04-2016.pdf




Publications in arXiv.org

Identifier

Primary Category

Title

1401.6789

physics.gen-ph

Inflection point analysis for Greek seismicity 1900-2006 

1312.2395

math.FA

On the effective radius of convergence for a given truncated power series expansion 

1311.7525

math.NA

Polynomial regression using trapezoidal rule for computing Legendre coefficients 

1311.1835

math.ST

Linear Regression without computing pseudo-inverse matrix 

1207.2611

stat.CO

A simple and numerical stable algorithm for solving the cone projection problem based on a Gram-Schmidt process 

1206.5478

math.NA

Developing methods for identifying the inflection point of a convex/concave curve 



Featured Publications in ResearchGate and stats until 10/10/2016

Title Date dd/mm/yy Reads 10/04/2016 Reads 10/10/2016
Letter to the Nobel Committee on LIGO claims for gravitational waves detections GW150914 and GW151226 30/06/16
804
On the Efficient Identification of an Inflection Point 29/06/16
221
Big data analysis of Livingston and Hanford logfiles for LIGO project 2010-2016 23/04/16 1770 6109
A detailed critical review of reported event GW150914 that LIGO/VIRGO collaboration announced as gravitational waves and black holes observation 28/03/16 2805 2988
Introducing Unit Invariant Knee (UIK) as an objective choice for elbow point in multivariate data analysis techniques 01/03/16 21 36
A first critical review of event GW150914 observed by LIGO detectors Livingston and Hanford 16/02/16 4414 4468
FORTRAN code for solving Lane-Emden differential equation for a differentially rotating polytropic star 17/01/16 21 28
Μια προσπάθεια ανίχνευσης χαοτικής συμπεριφοράς σε κβαντικές θεωρίες πεδίου (An attempt for detection of chaotic behavior in quantum field theories) 30/12/15 34 43
Extraction of the global absolute temperature for Northern Hemisphere using a set of 6190 meteorological stations from 1800 to 2013 (accepted manuscript) 24/03/15 99 140
The VAN predicted Earthquake that never happened 01/12/15 26 29
Reliable computations of knee point for a curve and introduction of a unit invariant estimation 01/12/14 605 887
Urgent hypothesis on plane MH370 disappearance and related problems 05/09/14 581 662
R package 'inflection' documentation 30/08/14 120 218
R package 'RootsExtremaInflections' documentation 28/08/14 25 30
A new cosmological paradigm: universal locality 07/08/14 125 175
Why relativity theories cannot serve as a cosmological paradigm 31/07/14 71 85
A POSSIBLE INSIGHT INTO THE NATURE OF SPIRIT AND DARK ENERGY 28/07/14 99 119
A simple definition of Time 16/06/14 499 10035
The Line, The Cave from The Republic of Plato and the The World of Universals from Bertrand Russell 04/06/14 47 53
Developing methods for identifying the inflection point of a convex/concave curve 03/06/14 260 347
Urgent hypothesis on plane MH370 disappearance 01/06/14 133 141
Find inflection point using R 31/05/14 629 781
Inflection point analysis for Greek seismicity 1900-2006 31/05/14 69 76
An attempt to analyse the puzzle of global Earth temperature evolution 27/05/14 144 166
Urgent hypothesis on plane MH370 disappearance v2 23/05/14 593 639
Extraction of the global absolute temperature for Northern hemisphere from a set of 6190 meteorological stations 22/05/14 185 200
Σημειώσεις Εργαστηρίου Γραμμικών Μαθηματικών 21/05/14 276 311
Linear Regression without computing pseudo-inverse matrix 20/05/14 64 70
Polynomial regression using trapezoidal rule for computing Legendre coefficients 20/05/14 41 43
Roots, extrema and inflection points by using a proper Taylor regression procedure 19/05/14 205 235
A simple and numerical stable algorithm for solving the cone projection problem based on a Gram-Schmidt process 17/05/14 33 33
On the effective radius of convergence for a given truncated power series expansion 16/05/14 31 33
Total Reads 2014-2016 14025 30205


Software

Language

Classification

Name

R project

Inflection point analysis

inflection  

R project

Numerical Mathematics

RootsExtremaInflections  

FORTRAN

Computational Astrophysics

FORTRAN code for solving Lane-Emden differential equation for a differentially rotating polytropic star  



1Εργαστήριο του μαθήματος Γραμμικών Μαθηματικών του αν. καθ. Στέλιου Κώτσιου, εαρινό εξάμηνο 2010-2011.

2Co-author: Dr Galina K. Ustinova, Vernadsky Institute of Geochemistry and Analytical Chemistry, RAS, Moscow

3Co-author: Dr Galina K. Ustinova, submitted at the 3rd Greek Conference on Philosophy of Science


Most read author from Greece and NKUA first ranking

The publication A simple definition of Time has given to National and Kapodistrian University of Athens
(NKUA) more reads than everyone of the Shanghai Ranking Top 10 universities:

ResearchGate weekly reads for the most read publication









RG Reads Shanghai
Academic Ranking of World Universities 2016 19-25/9/16 26/9-2/10/16 3-9/10/16 17-23/10/16 24-30/10/16 31/10-6/11/16 7-13/11/16 19/9-6/11/16 Ranking Ranking
National and Kapodistrian University of Athens 3000 3318 3000 2431 2014 2000 2000 17763 1 301-400
University of California, Berkeley 2000 2000 2000 2000 617 2000 2000 12617 2 3
Harvard University 2000 551 635 499 2000 832 475 6992 3 1
Massachusetts Institute of Technology (MIT) 618 525 849 706 333 806 973 4810 4 5
Stanford University 349 605 804 546 2000 391 830 5525 5 2
University of Cambridge 504 510 380 882 2000 355 602 5233 6 4
University of Oxford 631 437 646 571 401 382 400 3468 7 7
Columbia University 291 226 542 351 295 557 355 2617 8 9
University of Chicago 207 221 229 1000 206 176 193 2232 9 10
Princeton University 177 193 192 172 200 152 212 1298 10 6
California Institute of Technology 154 196 238 219 107 108 103 1125 11 8


Analytics for publication reads, ranking of National and Kapodistrian University of Athens
because of them plus software downloads can also be found here.

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