AD Scientific Index” (Alper-Doger Scientific Index):

This new index has been developed by Prof. Dr. Murat ALPER (MD) and Associate Prof. Dr. Cihan DÖĞER (MD) by using the total and last 5 years’ values of the i10 index, h-index, and citation scores in Google Scholar. In addition, the ratio of the last 5 years’ value to the total value of the above mentioned indexes is used. Using a total of nine parameters, the “AD Scientific Index” shows the ranking of an individual scientist by 12 subjects (Agriculture & Forestry, Arts, Design and Architecture, Business & Management, Economics & Econometrics, Education, Engineering & Technology, History, Philosophy, Theology, Law / Law and Legal Studies, Medical and Health Sciences, Natural Sciences, Social Sciences, and Others), 256 branches, 11,500 institutions of employment, 186 countries, 11 regions (Africa, Asia, Europe, North America, Latin America, Oceania, Arab Leageu, EECA, BRICS, USAN, and COMESA), and in the world. Thus, scientists can obtain their academic rankings and monitor developments in the ranking over time.  

Data Collection and Standardization:

Collecting data manually based on the ranking from Google Scholar, the profiles with up to 300 citations and verified addresses or the profiles that build confidence for their accuracy are listed primarily. Thus, it is aimed to standardize the names, institutions, and branches as much as possible. Non-standardized data including wide ranges of variations in the information and the use of abbreviations and a variety of languages have caused difficulties. Performing data mining and scrutinizing the acquired information, many profiles were excluded from the index. Furthermore, some of the profiles were excluded during the regular examination of the data onward. Data cleaning requires a regular process in place to be conducted meticulously. We welcome your contributions in data cleaning and ensuring accuracy.

Determining the subjects/departments, to which scientific fields would belong, may seem easy in some branches and in a variety of countries. However, it may create considerable confusion in some other countries, regions, and schools. We would like to emphasize that the following fields including Engineering, Natural and Environmental Sciences, Biology, and Biochemistry, Material Science, Chemistry, and Social Sciences may exist in quite variable spectrums in different countries. Therefore, we would like to stress that the standardization of subjects and branches has not been easy. To perform standardizations, we accepted the official names of the institutions and academic branches as accurate in the way that they were specified on the university website. We have developed this strategy in order to standardize this complex situation at least partially. Furthermore, we started a procedure to add an asterisk as “*” at the end of the names of the authors when a scientific paper of interest included many authors such as CERN’s scientific papers.

Ranking Criteria:

Ranking of scientists by the university, country, region, and in the world was performed based on the “total h-index”. The “total h-index” was used in rankings by the branch and the subbranch.

The ranking criteria based on the “total h-index” scores were used in the following order: Firstly, the “total h-index” scores; secondly, the total number of citations; and thirdly, the “total i10 index” scores (1. Total h-index scores, 2. Total number of citations, 3. Total i10 index scores, 4. Last 5 years’ h-index scores).

Ranking based on the last 5 years’ h-index scores was performed using criteria in the following order: 1. Last 5 years’ h-index scores, 2. Number of citations in the last 5 years, 3. Last 5 years’ i10 index scores, 4- Total h-index scores.  

The ranking criteria for the total i10 index were used in the following order: 1. Total i10 index scores, 2. Total h-index scores, 3. Total number of citations, and 4. Last 5 years’ i10 index scores.

Ranking based on the last 5 years’ i10 index scores was performed using the criteria in the following order: 1. Last 5 years’ i10 index scores, 2. Last 5 years’ h-index scores, 3. Number of citations in the last 5 years and 4. Total i10 index scores.

Ranking based on the total number of citations was performed using the criteria in the following order: 1. Total number of citations, 2. Total h-index scores, 3. Total i10 index scores and 4. Number of citations in the last 5 years.

Ranking based on the total number of citations in the last 5 years was performed using the criteria in the following order: 1: Number of citations in the last 5 years, 2. Last 5 years’ h-index scores, 3: Last 5 years’ i10 index scores and 4. Total number of citations

Why are the last 5 years’ ratios / total ratios important?

The h-index, i10 index, and the last 5-year ratios/total ratios are major unique characteristics of the AD Scientific Index, showing both the development in the individual performance of the scientist and the reflections of the institutional policies of universities onto the overall scientific picture.

Academic collaboration

Scientific fields of interest specified in the profiles of scientists are available for other scientists from different countries and institutions to enable academic collaboration.

 Ranking Criteria for Top Universities:

In the presence of many different university ranking systems, as the "AD Scientific Index", we have developed a ranking system with a different methodology based on the principle of including only meritorious scientists. Based on Google Scholar’s total h-index scores, we have listed all academicians, who are ranked in the world in the top 10,000 and top 100,000 in university rankings. Furthermore, we have listed the breakdown of this ranking by main subjects. As the order of ranking principles, we used the overall top 10,000 scientists list primarily. Secondly and thirdly, we used the ranking in the top 100,000 and top 200.000 scientists list. Fourthly, the total number of scientists in the AD Scientific Index was ranked by the university. In the case of equalities within a university ranking, we used the highest rank of the scientist in the respective university as it is listed in the world ranking.

You may sort the ranking from the highest score to the lowest or vice versa in any of these fields. You can observe the fields, which move the respective university to the forefront. Furthermore, the name of the academician with the highest total h-index in the respective university is displayed with the world ranking. Top University Ranking by “AD Scientific Index” will not only list the areas, where a university is the best or has room for improvement, but also reflect the outcomes of scientist policies of the institutions. This report reveals the competency of institutions to attract prized scientists and the ability of institutions to encourage advances and retain scientists.

Ranking Criteria for Countries:

As described in the university ranking section, it is not easy to obtain

and standardize data from about 13,500 universities for the country ranking. Therefore, we based our ranking system on the number of meritorious scientists. Four criteria are used to rank the countries. The first one is the number of scientists in the top 10,000 list. The second and third criterion are the number of scientists in the top 100,000 and top 200.000 list. The fourth one is the number of scientists listed in the AD Scientific Index. In the case of equalities after applying all these four criteria, the world rank of the meritorious scientist of that country is used.