Showing posts with label Melis Aygün. Show all posts
Showing posts with label Melis Aygün. Show all posts

August 5, 2008

Editorial Announcement: Withdrawal of Chin. Phys. Lett. 24 (2007) 1821

CHIN.PHYS.LETT.
Vol. 25, No. 8 (2008) 3094

This paper was submitted on 1 February 2007 and appeared in the July issue of 2007 in Chinese Physics Letters. Later it appeared also as arXiv:grqc/ 0707.1776 in July 2007.

As noted recently by the arXiv administrator, this paper plagiarized an earlier arXiv paper (grqc/0508005) by I. Radinschi and Th. Grammenos, which also appeared in Int. J. Mod. Phys. A 21 (2006) 4309.

This article by M. Aygun et al. should not have been submitted for publication owing to such substantial replication of an earlier paper. Chinese Physics Letters hereby declares the withdrawal of this paper ‘Moller Energy–Momentum Complex in General Relativity for Higher Dimensional Universes’ by M. Aygun, S. Aygun, I. Yilmaz, H. Baysal, and I. Tarhan published in Chinese Physics Letters, 24 (2007) 1821.

It is unfortunate that this plagiarism was not detected before going to press. I apologize to the readers of Chinese Physics Letters and to Dr I. Radinschi and Dr Th. Grammenos for such an oversight.

Editor: ZHU Bang-Fen

May 5, 2008

Editor's note: Recent instances of author misconduct in Pramana

PRAMANA
Vol. 70 (No. 5), page 761, May 2008

Editor's note
The exploding nature of the amount of available scientific information indeed makes it a very demanding job for referees and editors to catch possible cases of plagiarism. While many cases are discovered during the refereeing process, some do slip through it. We are sorry that this has happened for Pramana in a few cases, in spite of the vigilance by referees and editors. In continuation of the Editorial discussing general Pramana policy on plagiarism, we would also like to comment on a few cases of scientific misconduct on the part of the authors that Pramana has had to deal with in the past few months.
Pramana did not escape being involved in the much discussed case of 65 papers withdrawn by the arXiv administrators (Cornell University) citing excessive overlap with materials published by others or the authors themselves. Two papers published in *Pramana (Vol. 67, No. 2, pp. 239-247, August 2006; Vol. 68, No. 1, pp. 21-30, January 2007), were included in this list.
Pramana's own investigation, carried out with the help of Editorial Board Members concluded that 1. \. . . does not strictly qualify to be plagiarism for nothing is lifted verbatim, but it is certainly not also the case of the authors being unaware of the results . . . ". 2. . . . copied summary of discussion in parts - also acknowledged by authors. Looks like a case of minor plagiarism . . . ". Since we consider this as a form of plagiarism, we have asked the authors to publish an erratum in which appropriate references to the published material are cited when the discussion has had an overwhelming overlap with it.
In the second case (Pramana, Vol. 68, No. 6, pp. 995-999, June 2007; Vol. 69, No. 2, pp. 285-300, August 2007) we were alerted to overwhelming similarities with published material, by one of the authors of the plagiarized material. Pramana conducted its own investigation and confirmed 1. \. . . only the title, authors and acknowledgement are different but the whole text is plagiarized from - - -'s paper . . . ", 2. Clear case of plagiarism.
The competent authorities at the University (Dean, School of Physics, University of Malaysia) of the authors were informed, whereupon we found the disturbing news that the concerned authors were not members of the Institute they were claiming to be. These papers have been withdrawn by Pramana since then.
We have also uncovered instances where authors have submitted to Pramana a manuscript containing a part of the results presented in another manuscript submitted to another journal, prior to the submission to Pramana. This case of self-plagiarization was discovered already before publication, thanks to the vigilance of referees.
We would like to once again stress that Pramana takes a very serious view of such acts of plagiarization and indeed is bound to follow the steps laid out in the Editorial.


Rohini M Godbole
Editor
Pramana - J. Phys.


>>>>>>>>>>>>>> *See ERRATUM I & II <<<<<<<<<<<<<<

October 30, 2007

Editorial note: The issue of plagiarism

Gen Relativ Gravit
DOI 10.1007/s10714-007-0531-2

EDITORIAL
Editorial note: The issue of plagiarism
George F. R. Ellis · Hermann Nicolai
© Springer Science+Business Media, LLC 2007

Readers of this Journal may be aware that the admistrators of the internet archive www.arXiv.org have withdrawn a series of papers from the archive because of claimed plagiarism. Most of these papers have been published in reputable international journals, and the list includes two papers published in General Relativity and Gravitation. Because of the seriousness of these claims, we have investigated these two papers with the following results.

The first is gr-qc/0607104, published in Gen. Rel. Grav. 37:2093–2104 (2005). In this case, it is claimed there is substantial overlap with two other arXiv submissions; but these other papers are written by the same authors.We have checked that the three papers concerned contain different original research results, and this is indeed the case. However there is considerable repetition between them in the introductory material, where cut and paste techniques have been used. We do not see a serious problem in authors using such cutting and pasting techniques from their own papers for introductory material, even though we would prefer that material to be written anew each time. It is a matter of taste as to how much introductory material is repeated in each paper, and our referees generally ask for such duplication to be reduced. There may be more overlap than desirable in these three papers, but this does not constitute plagiarism, as originally claimed by the arXiv administrators.They have since revised that statement to “withdrawal because of excessive overlap” with other papers by the same authors. We do ask referees to comment if they detect such overlap.

The second paper is arxiv:0705.2930 [gr-qc], published in Gen. Rel. Grav. 39: 849–862 (2007). The issue is similar, but here there has been cutting and pasting of introductory material from papers by other authors, rather than from their own papers, and this is certainly objectionable.We do not believe referees or editors can be expected to detect such copying in general; rather their task is to see if the research presented is original and interesting, and this paper is acceptable in that regard; the research results are indeed new. We do not regard such word for word copying of introductory and descriptive material by others as acceptable, as it constitutes plagiarism of that material, even if there is no plagiarism of research results.

We hereby notify our potential authors that we do not regard the practice as acceptable, and we also note that internet search engines can easily detect such word for word copying, as happened in this case.

August 23, 2007

2007 Plagiarism Ring Affair - EUREKA

In August of 2007, the technology-oriented website Ars Technica [1] revealed that the arXiv was withdrawing a set of seventeen physics papers due to plagiarism. These papers had been written by a group of graduate students at the Middle East Technical University (METU) in Ankara, Turkey. After detecting the plagiarism, METU faculty began a process which Ars Technica called "damage control", requesting that the Journal of High Energy Physics withdraw a fraudulent article,[2] and working with arXiv administrators to further the removal process.[3] 
The total number of withdrawals eventually rose to sixty-five articles by fourteen authors,[4] at four Turkish institutions.[5]  
Throughout this article, papers and eprints designated as "plagiarized" have been marked so by arXiv administrators or other sources external to EUREKA.





Uncovery 
At the beginning of August, Philip Gibbs noted on his blog that his 1998 paper "A White Hole Model of the Big Bang"[6] had been plagiarized in a 2006 preprint, "Relative Energy Associated with a White Hole Model of the Big Bang".[7] Describing himself as "more amused than shocked", Gibbs indicated that the material copied from his paper was merely his description of the Lemaitre-Tolman model, not Gibbs' own original work.[8] (He later explained the motivation and general outline of that work on his blog.[9]) 
Shortly thereafter, arXiv administrators withdrew a second set of eprints, this time a collection of papers from Çanakkale Onsekiz Mart University (COMU) in Çanakkale, Turkey.
The journal Nature picked up the story in September,[5] and as the Chronicle of Higher Education blog summarized, 67 papers by 15 physicists at four Turkish universities were pulled after an examination of their content revealed that they "plagiarize the works of others or contain inappropriate levels of overlap with earlier articles." [...] Suspicions were apparently stoked when, during oral defenses of their dissertations last fall, [Mustafa] Salti and another student demonstrated a poor grasp of even the most basic of physics concepts. Professors at the university began to investigate the students' work and turned up several examples of plagiarized work by them, as well as by students and professors at three other Turkish universities — Dicle University, the University of Mersin, and Çanakkale Onsekiz Mart University.[10]

Impact
Members of the physics community are still uncertain how severe the damage from this incident will transpire to be. Paul Ginsparg, a physics professor and central figure behind the arXiv, contended that the derivative nature of the plagiarized work minimized the harm it could bring about: "There's little effect on science, since the people who produce high quality work don't need to plagiarize, and the people who do need to plagiarize don't produce high enough quality work to affect anything."[3]
Furthermore, since many of the papers dealt with a rather obscure topic, the Møller version of general relativity, few other physicists would be likely to examine the papers, Ginsparg told Nature.[5]
Others point to the as-yet-unknown extent of the METU-related fraud, and the possibility of other, similar deceptions currently unidentified. In addition, it is difficult to judge whether plagiarizing papers is as harmful as, for example, falsifying data. Since the former generally involves recycling notions which have already gained some degree of scientific acceptance, the primary harm resulting from such plagiarism may be that it furthers the careers of undeserving persons in a scientific community possessing only limited resources.[3] 

List of Affected Journals
The following journals accepted work which the arXiv later identified as plagiarized.
-General Relativity and Gravitation (0705.2930 and gr-qc/0607104).
Peter Woit says, "The situation of the second of these is really confusing, since according to the arXiv it plagiarizes a paper by a completely different group in India, one that the arXiv lists as having "excessive overlap" with an earlier paper by the Turkish plagiarists."[11]
Woit notes,There are also other papers by some of the same authors which the arXiv does not list as plagiarized (published in Nuclear Physics B, here, Classical and Quantum Gravity, here, International Journal of Modern Physics, here and here).[11]




Plagiarism at COMU
Shortly after the METU story broke, on 2007-08-22, arXiv administrators withdrew sixteen additional eprints, these authored by former graduate students at Çanakkale Onsekiz Mart University (COMU) in Çanakkale, Turkey. These students, two of whom had shared a thesis advisor, appear to constitute a second Turkish plagiarism ring.

The eprints withdrawn by arXiv are as follows.
*Møller Energy-Momentum Complex in General Relativity for Higher Dimensional Universes. M. Aygun, S. Aygun, I. Yilmaz, H. Baysal, I. Tarhan. Published in Chinese Physics Letters, 24 (2007), 1821. Plagiarizes:
*On the Energy-Momentum Problem in Static Einstein Universe. Sezgin Aygun, Ismail Tarhan, Husnu Baysal. Published: Chinese Physics Letters 24 (2) (2007), 355. Plagiarizes:


*Energy and Momentum of Bell-Szekeres Space-time in Moller Prescription. Sezgin Aygun. Published: Acta Physica Polonica B38 (2007) 73-80. Plagiarizes:

Ragab M. Gad. Energy Distribution of a Stationary Beam of Light. Astrophys.Space Sci. 295 (2005) 451-458.


*The Colliding Plane Wave and Energy-Momentum Problems in General Relativity and Teleparallel Gravity. Sezgin Aygun, Ismail Tarhan, Husnu Baysal, Melis Aygun. Plagiarizes:
Yu-Xiao Liu, Zhen-Hua Zhao, Jie Yang, Yi-Shi Duan. The total energy-momentum of the universe in teleparallel gravity.

V. C. de Andrade, L. C. T. Guillen, J. G. Pereira. Gravitational Energy-Momentum Density in Teleparallel Gravity Physical Review Letters 84 (2000) 4533-4536.

*The Energy of Marder Space-Time in Moller Prescription. Sezgin Aygun, Husnu Baysal, Ismail Tarhan. Plagiarizes: 
Gamal G.L. Nashed. Charged Axially Symmetric Solution, Energy and Angular Momentum in Tetrad Theory of Gravitation. Int. J. Mod. Phys. Lett. A 21 (2006), 3181


*The Energy Momentum Problem in Teleparallel Gravity For Bianchi Type II-VIII-IX Universes. Sezgin Aygun, Melis Aygun, Ismail Tarhan. Autoplagiarism.

*Energy And Momentum Associated With Bianchi Type Universes. Sezgin Aygun, Melis Aygun, Ismail Tarhan. Plagiarizes:  

*Energy Momentum Complexes For Bianchi Type II-VIII-IX Universes. Sezgin Aygun, Melis Aygun, Ismail Tarhan. Plagiarizes:  


*Energy Momentum Localization for Bianchi I-III-V-VI0 Universe in Teleparallel Gravity. Sezgin Aygun, Melis Aygun, Ismail Tarhan. Plagiarizes: 


*Energy Momentum of Marder Universe in Teleparallel gravity. Sezgin Aygun, Husnu Baysal, Ismail Tarhan. International Journal of Theoretical Physics, (2007). Plagiarizes:  
Yu-Xiao Liu, Zhen-Hua Zhao, Jie Yang, Yi-Shi Duan. The total energy-momentum of the universe in teleparallel gravity


*Topological defect solutions in the spherically symmetric space-time admitting conformal motion. Ihsan Yilmaz, Melis Aygun, Sezgin Aygun. Published: General Relativity and Gravitation, 37 (2005) 2093-2104. Plagiarizes:

*On the Energy Momentum in Bianchi Type I-III-V-VI0 Space-Time. Sezgin Aygun, Melis Aygun, Ismail Tarhan. Plagiarizes:


*Energy Momentum Localization in Marder Space-Time. Sezgin Aygun, Melis Aygun, Ismail Tarhan. Plagiarizes:


*Energy and Momentum of The Szekeres Universes in Tele-parallel Gravity. Sezgin Aygun, Ismail Tarhan, Husnu Baysal. Plagiarizes:



*Energy Distribution in Szekeres Type I and II Space Times. Sezgin Aygun, Melis Aygun, Ismail Tarhan. Published: Acta Physica Polonica B37 (2006) 2781-2794. Autoplagiarism.


J.D. Barrow, R. Maartens, C.G. Tsagas. Cosmology with inhomogeneous magnetic fields. Physics Reports 449 (2007) 131-171

A. Perez Martinez, H. Perez Rojas, H. J. Mosquera Cuesta, M. Boligan, M. G. Orsaria. Quark stars and quantum-magnetically induced collapse. International Journal of Modern Physics D14 (2005) 1959

D. Gondek-Rosinska, E. Gourgoulhon, P. Haensel. Are rotating strange quark stars good sources of gravitational waves? Astronomy & Astrophysics 412 (2003) 777-790

R Sharma, S Karmakar, S Mukherjee. Maximum mass of a cold compact star. International Journal of Modern Physics D15 (2006) 405-418

Masaru Shibata, Yuk Tung Liu, Stuart L. Shapiro, Branson C. Stephens. Magnetorotational collapse of massive stellar cores to neutron stars: Simulations in full general relativity. Physical Review D74 (2006) 104026.
References


  2. ↑ The arXiv entry may be viewed here, as of 2007-08-23; the paper was removed from the arXiv, and after some delay from the Journal of High Energy Physics also.



  4. ↑ 65 admin withdrawals, arXiv. Accessed 2007-10-26.
    Note that an earlier version of this arXiv page indicated sixty-seven withdrawn papers by fifteen authors, due to an administrative error on arXiv's part.


  5. ↑ 5.0 5.1 5.2 Geoff Brumfiel, Turkish physicists face accusations of plagiarism Nature News (subscription required), 2007-09-05. Accessed 2007-09-07.



  7. ↑ Figen Binbay, Irfan Acikgoz, Mustafa Salti. Relative Energy Associated with a White Hole Model of the Big Bang, 2006-07-20. Withdrawn from arXiv on 2007-07-26.



  9. ↑ Philip Gibbs. A white hole model of the big bang. Event Symmetry 2007-08-25.


  10. ↑ Aisha Labi, Turkish Professors Uncover Plagiarism in Papers Posted on Physics Server, Chronicle of Higher Education blog, 2007-09-06. Accessed 2007-09-07.


  11. ↑ 11.0 11.1 Peter Woit. Massive plagiarism scandal, Not Even Wrong 2007-08-23.

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