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#dimensions

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A #Question for #Krononauts

A #shoebox is floating in #SpaceTime. We can #identify its 2 sides as X, its ends as Y, and top & bottom as Z. Now, rotating the box, the Xs might become Zs, or some other 2- or 3-way inversion.

4-D might have X, Y, Z & T (for Time). Could these 4 #axes or #dimensions also be "rotated"? Could someone live in "#spatial" dimensions of X, Y & T, with Z being their Time? If so, could our X-dimension be someone else's Time #dimension?

Replied to Kemal ASLAN

4. Boyut için özel YouTube Oynatma Listesi hazırladım.

Bulduğum güzel videoları kaybetmemek için içine ekleyeceğim.

Başlığı "Boyutlar" yapıp tüm boyutlar için paylaşılmış güzel videoları eklemeyi düşündüm, ama konu karışık önce 4. Boyutu anlamak lazım.

Sözde anladığımı sandığım hâlde gündelik hayâtta karşılığı olmadığı için unutup karıştırıyorum! ツ

#dimension #dimensions #4thdimension #physics
_______
• 4. BOYUT (4D): youtube.com/watch?v=5x8XS9ch8t

The concept of higher dimensions beyond the familiar three of space and one of time poses intriguing questions. If these dimensions exist, how are they structured? Theoretical frameworks like string theory suggest the presence of extra spatial dimensions, potentially compactified in complex internal spaces too small for direct observation. Exploring this could unlock a deeper understanding of fundamental forces and reconcile quantum mechanics with gravity. #Physics #Dimensions #StringTheory

   
❛❛ Teen #Mathematicians Tie #Knots Through a #Mind-Blowing Fractal ❜❜

Three high schoolers and their mentor revisited a century-old #theorem to prove that all #knots can be found in a #fractal called the #MengerSponge.
Gregory Barber for #QuantaMagazine

🔗 QuantaMagazine.org/teen-mathem 2024 Nov 26 ce
🔗 Wikipedia.org/wiki/Menger_spon   #MengerSponge
🔗 Wikipedia.org/wiki/Topology   #Topology

New study: "Non-selective databases (#Dimensions, #OpenAlex, #Scilit, and #TheLens) index a greater amount of retracted literature than do databases that rely their indexation on venue selection (#PubMed, #Scopus, and #WoS)…The high coverage of OpenAlex and Scilit could be explained by the inaccurate labeling of retracted documents in #Scopus, Dimensions, and The Lens."
link.springer.com/article/10.1

SpringerLinkThe indexation of retracted literature in seven principal scholarly databases: a coverage comparison of dimensions, OpenAlex, PubMed, Scilit, Scopus, The Lens and Web of Science - ScientometricsIn this study, the coverage and overlap of retracted publications, retraction notices and withdrawals are compared across seven significant scholarly databases, with the aim to check for discrepancies, pinpoint the causes of those discrepancies, and choose the best product to produce the most accurate picture of retracted literature. Seven scholarly databases were searched to obtain all the retracted publications, retraction notices and withdrawal from 2000. Only web search interfaces were used, excepting in OpenAlex and Scilit. The findings demonstrate that non-selective databases (Dimensions, OpenAlex, Scilit, and The Lens) index a greater amount of retracted literature than do databases that rely their indexation on venue selection (PubMed, Scopus, and WoS). The key factors explaining these discrepancies are the indexation of withdrawals and proceeding articles. Additionally, the high coverage of OpenAlex and Scilit could be explained by the inaccurate labeling of retracted documents in Scopus, Dimensions, and The Lens. 99% of the sample is jointly covered by OpenAlex, Scilit and WoS. The study suggests that research on retracted literature would require querying more than one source and that it should be advisable to accurately identify and label this literature in academic databases.

Update. More data on the #WOS bias toward the #oligopoly of large publishers, and the absence of that bias in more inclusive indices like #OpenAlex (@OpenAlex) and #Dimensions.
arxiv.org/abs/2406.17893

arXiv.orgThe oligopoly of academic publishers persists in exclusive databaseGlobal scholarly publishing has been dominated by a small number of publishers for several decades. We aimed to revisit the debate on corporate control of scholarly publishing by analyzing the relative shares of major publishers and smaller, independent publishers. Using the Web of Science, Dimensions and OpenAlex, we managed to retrieve twice as many articles indexed in Dimensions and OpenAlex, compared to the rather selective Web of Science. As a result of excluding smaller publishers, the 'oligopoly' of scholarly publishers persists, at least in appearance, according to the Web of Science. However, both Dimensions' and OpenAlex' inclusive indexing revealed the share of smaller publishers has been growing rapidly, especially since the onset of large-scale online publishing around 2000, resulting in a current cumulative dominance of smaller publishers. While the expansion of small publishers was most pronounced in the social sciences and humanities, the natural and medical sciences showed a similar trend. A major geographical divergence is also revealed, with some countries, mostly Anglo-Saxon and/or located in northwestern Europe, relying heavily on major publishers for the dissemination of their research, while others being relatively independent of the oligopoly, such as those in Latin America, northern Africa, eastern Europe and parts of Asia. The emergence of digital publishing, the reduction of expenses for printing and distribution and open-source journal management tools may have contributed to the emergence of small publishers, while the development of inclusive bibliometric databases has allowed for the effective indexing of journals and articles. We conclude that enhanced visibility to recently created, independent journals may favour their growth and stimulate global scholarly bibliodiversity.