Wikipedia

Pengendali kosmologi Boushaki

Pengendali kosmologi Boushaki atau indeks ketidakkonsistenan (IOI) ialah teknik statistik kosmologi yang dibangunkan oleh Mustapha Ishak Boushaki sejak 2006 untuk menganalisis pengembangan alam semesta.[1][2][3][4][5]

Pengendali kosmologi Boushaki
Umum
PengarangMustapha Ishak Boushaki
Tajuk asal
bahasa Inggeris: Boushaki cosmological operator
bahasa Inggeris: Index Of Inconsistency (IOI)
Negara Amerika Syarikat
BahasaBahasa Inggeris
SubjekTeori kerelatifan, Kerelatifan am, Pemalar kosmologi, Graviti, Hukum Hubble
GenreFizik, Astrofizik, Alam semesta, Perangkaan
Tarikh penerbitan
2006

Penyelidikan primer Sunting

Profesor Mustapha Ishak Boushaki menerbitkan kertas pertamanya mengenai ketidakkonsistenan pengembangan alam semesta pada tahun 2006 selepas menyerahkan tesis kedoktorannya bertajuk "Kajian dalam model kosmologi tidak homogen" di bawah penyeliaan Profesor Kayll William Lake pada Jun 2003 dalam Queen's University di Kingston.[6][7][8][9][10]

Boushaki cuba menyelesaikan misteri yang tersembunyi dalam pengembangan alam semesta yang mempercepatkan dengan mengkaji peranan tenaga gelap teori dalam pengubahsuaian kesan gelombang kegravitian.[11][12][13][14][15]

Indeks tidak konsisten Sunting

Ishak-Boushaki dan pelajarnya Weikang Lin membangunkan ukuran baharu di Universiti Texas di Dallas, yang dipanggil indeks ketidakkonsistenan (IOI), yang boleh memberikan nilai berangka kepada berapa banyak lebih daripada dua set data tidak bersetuju.[16][17][18][19][20]

Dalam alat ini, nilai ketidakkonsistenan lebih daripada satu mungkin bermakna set data kosmologi tidak konsisten, manakala nilai lebih daripada lima meletakkannya dalam kelas ketidakkonsistenan yang kuat.[21][22][23][24][25]

Kaedah ini dan kaedah lain digunakan untuk menilai fenomena ketidakkonsistenan yang tidak sepadan dengan hasil alat Max Planck.[26][27][28][29][30]

Pemalar Hubble Sunting

 
Teleskop Tinjauan Sinoptik Besar

Alat statistik ini digunakan untuk membandingkan beberapa teknik yang berbeza untuk menilai pemalar Hubble, yang mendedahkan kadar di mana alam semesta berkembang.[31][32][33][34][35]

Sejak 2016, Boushaki menggunakan ukuran malar ini dalam laporannya yang menangani hasil daripada menyiasat ketidakhomogenan pada jarak kosmologi dan pertumbuhan struktur berskala besar.[36][37][38][39][40]

Sesungguhnya, kajian dan laporan ini telah menunjukkan bahawa pemalar kosmologi yang penting ini boleh dialihkan daripada nilai sebenar apabila ketidakhomogenan tidak diambil kira.[41][42][43][44][45]

Boushaki menggunakan data yang dihasilkan oleh kamera canggih Teleskop Angkasa Hubble untuk meninjau dan mengira dengan alat IOI bentuk tenaga baharu yang terlibat dalam pengembangan kosmik di seluruh alam semesta dengan pemalar kosmologi yang dinilai.[46][47][48][49][50]

Teleskop Tinjauan Sinoptik Besar Sunting

Boushaki bersama pasukan penyelidiknya di University of Texas di Dallas telah menyediakan alat IOI mereka untuk saintis lain di seluruh dunia untuk digunakan bagi menjaga ketidakkonsistenan antara set data.[51][52][53][54][55]

Kerjasama percuma ini adalah sebahagian daripada projek Teleskop Tinjauan Sinoptik Besar (LSST) yang menangani ukuran percanggahan kosmologi dan kesan peminggiran, dan aplikasinya pada geometri dan pertumbuhan set data semasa, dengan menggunakan juga Instrumen Spektroskopi Tenaga Gelap (DESI).[56][57][58][59]

Rujukan Sunting

  1. ^ Nola Taylor Tillman (July 19, 2018). "Universe Expansion 'Detective Story' Examined with New Tool". Space.com.
  2. ^ "Faculty Highlight: Mustapha Ishak-Boushaki | Department of Physics". physics.utdallas.edu.
  3. ^ Ishak-Boushaki, Mustapha (June 1, 2003). "Studies in inhomogeneous cosmological models". m/s. 5890. Bibcode:2003PhDT.........1I – melalui NASA ADS.
  4. ^ "Data discrepancies may affect understanding of the universe". EurekAlert!.
  5. ^ Camber, Bruce (September 10, 2018). "Ishak-Boushaki, Mustapha".
  6. ^ "Data Discrepancies May Affect Understanding of the Universe". News Center.
  7. ^ https://www.ictp-saifr.org/wp-content/uploads/2020/12/Mustapha-Ishak-LAWOC-2020.pdf[PDF URL kosong]
  8. ^ Lin, Weikang; Ishak, Mustapha (July 25, 2017). "Cosmological discordances: a new measure, marginalization effects, and application to geometry vs growth current data sets". Physical Review D. 96 (2): 023532. arXiv:1705.05303. doi:10.1103/PhysRevD.96.023532. S2CID 119075341 – melalui arXiv.org.
  9. ^ Mazurek, Jiri (2017). "On Inconsistency Indices and Inconsistency Axioms in Pairwise Comparisons". arXiv:1703.05204.
  10. ^ https://inside.tamuc.edu/academics/colleges/scienceEngineeringAgriculture/departments/physicsAstronomy/colloquiaSeminars/PDFs/ishaktalk.pdf[PDF URL kosong]
  11. ^ Dallas, University of Texas at (November 15, 2020). "Astrophysics Improve Gravitational Lensing Signals for More Accurate Cosmological Model of the Universe". SciTechDaily.
  12. ^ "Dark Energy Could be a Breakdown of Einstein's Theory". May 18, 2005.
  13. ^ "Colloquium - Mustapha Ishak-Boushaki | Department of Physics". physics.unt.edu.
  14. ^ "2018 Fall Physics Colloquium Series: Mustapha Ishak-Boushaki, Ph.D." Calendar | Baylor University.
  15. ^ https://iopscience.iop.org/article/10.1088/1475-7516/2021/05/009
  16. ^ https://utd-ir.tdl.org/bitstream/handle/10735.1/6393/ETD-5608-032-LIN-9413.13.pdf[PDF URL kosong]
  17. ^ Kosarzycki, Radek (June 6, 2018). "Rozbieżności w danych mogą znacząco wpłynąć na naszą wiedzę o wszechświecie".
  18. ^ "INSPIRE". inspirehep.net.
  19. ^ "New insight into Earth's crust, mantle and outer core interactions". October 29, 2018.
  20. ^ "INSPIRE". inspirehep.net.
  21. ^ Ishak-Boushaki, M.; Garcia-Quintero, C. (January 1, 2021). "Testing deviations from general relativity at cosmological scales reveals a new dichotomy between Planck and lensing data". American Astronomical Society Meeting Abstracts. 53 (1): 410.03. Bibcode:2021AAS...23741003I – melalui NASA ADS.
  22. ^ "Ishak-Boushaki, Mustapha". utd-ir.tdl.org.
  23. ^ "Repulsion Theory, Strepulsion Theory, Black Matter, Dark Energy, Black Hole, Astrophysics, Stellar Repulsion Force, Isaac Newton, Einstein Theory of Gravity, Astronomical Force, Gravitational Force, Mystery of Expanding Universe, Mystery of Thermonuclear Reaction, Solar Systems, Dark Matter, Neutron stars, Physics, Inertia, Galaxies, Bing Bang Theory, Space Time Curvature, Mystery of Black Hole and Neutron Stars, Cosmic Partial". www.strepulsion.com.
  24. ^ http://www.as.utexas.edu/texascosmo/secure/ishak.pdf[PDF URL kosong]
  25. ^ "University of Texas at Dallas: Explorers of Space, Deep Earth Named AAAS Fellows for Stellar Work". February 28, 2022.
  26. ^ http://www.ctc.cam.ac.uk/activities/cosmo2013/presentations/MustaphaIshak.pdf[PDF URL kosong]
  27. ^ Boushaki, M. Ishak (2010). "2010AfrSk..14....9B Page 9". African Skies. 14: 9. Bibcode:2010AfrSk..14....9B.
  28. ^ "Spaceflight Now | Breaking News | Scientists propose new way to probe dark energy". spaceflightnow.com.
  29. ^ "APS -2018 Joint Fall Meeting of the Texas Sections of APS, AAPT and Zone 13 of the SPS - Event - Using consistency tests between cosmological data sets to investigate gravity theory and cosmic acceleration". American Physical Society – melalui meetings.aps.org.
  30. ^ "Data discrepancies may affect understanding of the universe". ScienceDaily.
  31. ^ https://phys.org/news/2014-06-lumpy-universe-cosmic.html
  32. ^ "Mustapha Ishak-Boushaki". Gyaanipedia.
  33. ^ https://www.eurekalert.org/news-releases/578640
  34. ^ https://www.universetoday.com/10530/dark-energy-could-be-a-breakdown-of-einsteins-theory/
  35. ^ https://scitechdaily.com/astrophysics-improve-gravitational-lensing-signals-for-more-accurate-cosmological-model-of-the-universe/
  36. ^ Ishak-Boushaki, Mustapha B.; Wijenayake, Tharake (2016). "Constraints from Cosmological Data on Expansion and Growth of Structure Observables in a Macroscopic Gravity Averaged Universe". American Astronomical Society Meeting Abstracts #228. 228. Bibcode:2016AAS...22840303I.
  37. ^ Ishak-Boushaki, Mustapha B. (2018). "Probing gravity theory and cosmic acceleration using (In)consistency tests between cosmological data sets". American Astronomical Society Meeting Abstracts #232. 232. Bibcode:2018AAS...23210202I.
  38. ^ https://www.sciencedaily.com/releases/2018/06/180605172455.htm
  39. ^ https://baas.aas.org/pub/2021n1i350p07/release/1?readingCollection=27a4f9bb
  40. ^ https://skyandtelescope.org/astronomy-news/dark-days-for-dark-energy/
  41. ^ https://www.templeton.org/grant/investigating-the-effects-of-cosmic-inhomogeneities-on-precision-cosmology
  42. ^ http://at.yorku.ca/c/b/o/a/09.htm
  43. ^ https://meetings.aps.org/Meeting/TSF18/Session/C03.2
  44. ^ https://www.ictp-saifr.org/wp-content/uploads/2020/12/Mustapha-Ishak-LAWOC-2020.pdf[PDF URL kosong]
  45. ^ https://news.uchicago.edu/explainer/hubble-constant-explained
  46. ^ https://www.centauri-dreams.org/2005/05/19/is-dark-energy-real/
  47. ^ https://www.sciencedaily.com/releases/2020/10/201019164944.htm
  48. ^ https://baas.aas.org/pub/2021n1i546p04/release/1?readingCollection=27a4f9bb
  49. ^ https://www.nationalacademies.org/event/03-03-2022/committee-on-astronomy-and-astrophysics-roman-space-telescope-teleconference-2
  50. ^ https://fr.gsusigmanu.org/6586-does-gravitational-lensing-provide-time-evolution-in.html
  51. ^ https://www.eurekalert.org/news-releases/578640
  52. ^ https://news.utdallas.edu/science-technology/data-discrepancies-may-affect-understanding-of-the/
  53. ^ https://www.space.com/41210-clashing-observations-mysteries-universe-expansion.html
  54. ^ https://gsusigmanu.org/2317-theoretically-could-the-expansion-of-the-universe-af.html
  55. ^ https://phys.org/news/2018-06-discrepancies-affect-universe.html
  56. ^ https://utd-ir.tdl.org/bitstream/handle/10735.1/6393/ETD-5608-032-LIN-9413.13.pdf[PDF URL kosong]
  57. ^ https://indiaeducationdiary.in/university-of-texas-at-dallas-explorers-of-space-deep-earth-named-aaas-fellows-for-stellar-work/
  58. ^ https://news.utdallas.edu/faculty-staff/aaas-fellows-2022/
  59. ^ https://baas.aas.org/pub/2021n1i303p04/release/1?readingCollection=27a4f9bb

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