The source-effort coverage of an exponential informetric process

Lafouge, Thierry; Agouzal, Abdellatif

doi:10.1016/j.joi.2014.12.004

Cited by 2 publications

(2 citation statements)

References 11 publications

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“…4) that were previously found are insufficient to explain the experimental results in a satisfactory way. A possible explanation is offered, using recent works (Lafouge and Agouzal 2015) that combine power laws and effort functions.…”

Section: Hypotheses and Objectivesmentioning

confidence: 99%

“…Throughout the text's deconstruction, each step i is characterised by an effort function F i . This formalism uses the effort function concept(Lafouge and Smolczewska 2006;Lafouge and Agouzal 2015).If we choose F i r ð Þ ¼ Ln r ð Þ Ln Vi ð Þ , we find the previous result, which is b i ¼ A Ln(V i Þ meaning that A is constant. This model remains incomplete and isn't fully satisfactory, but provides us with new research perspectives.…”

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The deconstruction of a text: the permanence of the generalized Zipf law—the inter-textual relationship between entropy and effort amount

2015

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Zipf's law has intrigued people for a long time. This distribution models a certain type of statistical regularity observed in a text. George K. Zipf showed that, if a word is characterised by its frequency, then, rank and frequency are not independent and approximately verify the relationship:Rank Â frequency % constant Various explanations have been advanced to explain this law. In this article, we talk about the Mandelbrot process, which includes two very different approaches. In the first approach, Mandelbrot studies language generation as the transmission of a signal and bases it on information theory, using the entropy concept. In the second, geometric approach, he draws a parallel with the fractal theory, where each word of the text is a sequence of characters framed by two separators, meaning a simple geometric pattern. This leads us to hypothesise that, since the statistical regularities observed have several possible explanations, Zipf's law carries other patterns. To verify this hypothesis, we chose a text, which we modified and degraded in several successive stages. We called T i the text degraded at step i. We then segmented T i into words. We found that rank and frequency were not independent and approximately verified the relationship:The coefficient b i increases with each step i. We call Eq. (1) the generalized Zipf law. We found statistical regularities in the deconstruction of the text. We notably observed a linear relationship between the entropy H i and the amount of effort E i of the various degraded texts T i . To verify our assumptions, we degraded a text of approximately 200 pages. At each step, we calculated various parameters such as entropy, the amount of effort, and the

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The deconstruction of a text: the permanence of the generalized Zipf law—the inter-textual relationship between entropy and effort amount

2015

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Novel study on microbial fuel cells via a comprehensive bibliometric and dynamic approach

Steinberger‐Wilckens

Jiang

et al. 2021

Reviews on Environmental Health

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Microbial fuel cells (MFCs) are eco-friendly and useful bioelectrical devices that harness the natural metabolisms of microbes to produce electrical power directly from organic materials. In this study, a bibliometric analysis is conducted to evaluate MFC research from 2001 to 2018 on the basis of the Science Citation Index Expanded database. Overall, MFC research has experienced a dramatic increase over last 18 years, with an exponential growth in the accumulated number of publications. Most publications are closely related to the industrialization and commoditization of MFCs, along with environmental issues, which are currently the biggest global challenges in MFC studies. A small proportion (4.34%) of the scientific journals published more than half (54.34%) of the total articles in the MFC field. Articles from the top 10 countries/regions accounted for the majority (83.16%) of the total articles, clearly indicating that advanced MFC technologies are currently dominated by these countries/regions. Moreover, an increasing number of MFC researchers are considering two-chamber and three-chamber MFC reactions. In particular, they are focusing on environmental technology instead of merely improving the efficiency of electricity generation. Materials research in the MFC field is still a popular area worldwide, and many researchers have focused on novel and eco-friendly cathode and anode developments. Meanwhile, only a few MFC studies are concerned with biological research.

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The source-effort coverage of an exponential informetric process

Cited by 2 publications

References 11 publications

The deconstruction of a text: the permanence of the generalized Zipf law—the inter-textual relationship between entropy and effort amount

The deconstruction of a text: the permanence of the generalized Zipf law—the inter-textual relationship between entropy and effort amount

Novel study on microbial fuel cells via a comprehensive bibliometric and dynamic approach

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