Scholar H-Index Calculator - Home page

About Scholar H-Index Calculator

Scholar H-Index Calculator (the Calculator from now on) is an addon for Firefox which enhances Google Scholar results pages by showing a number of bibliometric data computed using the data appearing on video as input.

Once installed, the Calculator works transparently when querying Google Scholar: as soon as you make a query, result pages are enriched with a number of useful data (e.g. the h-index computed on the basis of displayed data), and new functions are available.

The Team

Project Coordinator

• Giovambattista Ianni (Code designing, writing, reviewing, maintainance and refactoring)

Developers Team

• Francesco Cauteruccio (Aggressive refining engine), Susanna Cozza (General code maintainance), Stefano Germano (Custom formulas parser), Maria Carmela Santoro (General code refactoring, Additional results browsing code).

You can contact us at shi_AT_mat.unical.it (replace _AT_ with a '@' to obtain our mail address).

Download

• Beta 3.0 (Coming soon).

• Official Scholar H-Index Calculator page at Mozilla.

Documentation and examples

Custom formula editing

As of Calculator 3.0, there is the possibility for users to add their own bibliometric formulas and display their outcome next to default indices. There are two types of custom formulas: Normalizations and Indices.

Normalizations

In the Calculator information box, each row shows bibliometric indices depending on a given Normalization. Each normalization weighs citations of each paper depending on a given criterion. Three are the default normalizations:

• 'none' : no normalization. The normalized citations of a paper correspond to those displayed (after subtracting self citations). Same as the custom formula citations-selfCitations.

• 'by authors': the citations of each paper are normalized by the (estimated) number of authors. Same as the custom formula (citations-selfCitations)/authors. For instance a paper with 100 citations and 4 authors, will score a number of normalized citations of 25. The number of authors cannot be always estimated correctly unless the refinement function is used. You might want to read the Author Refinement section about how the Calculator estimates the number of authors per each paper.

• 'by age': if paper i has been cited t times, and has been written in 2001, its number of normalized citations per age is t/(CY-2001+1), for CY the current year. Same as the custom formula (citations-selfCitations)/(thisYear-year+1). As an example, a paper scoring 100 citations and written in 2003, would score 10 normalized citations.

You can add your own normalization formulas by clicking on the button 'New normalization' on the bottom of the Information box. Two editable textfield will appear. Enter the normalization name in the leftmost field and your custom formulas in the rightmost. Click anywhere else when ready, and if your formula is correct, you should see a new row in which all the available indices are computed according to your new normalization notion. Enjoy!

Normalization Language

You should be aware that normalization formulas are applied on per paper basis: your normalization formulas are intended to work in the context of a single paper. For a paper i a custom normalization formula f(i) returns a number of citations, depending on how f behaves. A normalization formula can access the following attributes of the paper i:

• citations : the number of citations for i} (as it appears on video).

• year: the year of publication of i (as it appears on video. Conventionally set to '0' if not present).

• authors}: the number of authors of i. This is estimated as it appears on video, and can be manually edited by clicking on the Authors field or acting on the 'Auth+' and 'Auth-' buttons for the paper 'i'. See the Author Refinement section.

• selfCitations: the number of self citations of i, as they appear in the 'Self Citation' editable text field. Defaults to 0.

• cleanCitations}}: a shortcut for {{{(citations-selfCitations).

• age : a shortcut for (thisYear-year+1).

Allowed symbols:

• +, -, /, *, ^, (, ), with intuitive meaning (^ is exponentiation). The square root of x can be easily obtained as x^0.5.

Some further examples:

• Carbone's normalization: citations/(authors^0.5).

• hc-index(delta,gamma) : gamma*citations/age^delta (replace gamma and delta with your favourite values)

• Combined age and author weighting: citations/age/authors

You should enable the Advanced interface first.

Indices

Release Notes

Related Work

Selected Publications