Andras Schubert

• dr. techn.
• Senior Researcher at Hungarian Academy of Sciences

Recently, the need to contribute to the evaluation of the scientific, social, and political impact of Social Sciences and Humanities (SSH) research has become a demand of policy makers and society. The international scientific community has made significant advances that have transformed the impact of evaluation landscape. This article reviews the...

Macro-level domains of the science system, usually referred to as STM and SSH disciplines, have often been contrasted from various perspectives, regarding the characteristic composition of their publication channels, referencing or communication practices, and the related consequences in research evaluation. It is also long been conjectured that so...

The ratio of the total number of citations to the total number of cited papers was called “Garfield’s Constant” in some of the earlier works of Eugene Garfield. Later, he himself realized that the ratio is changing over time, but still was confident that behind this ratio some deeper regularity may be found. In the present paper a systematic analys...

Editorial boards of cardiology journals are analyzed to find patterns of power positions in cardiology publications. The study covers the meso (journal), macro (national) and the micro (individual researcher) levels. It was confirmed that the editors are prominent members of the research community both as their publication productivity and their ci...

Self-references, self-citations are considered by some as the sign of vanity, and deemed to be omitted from scientometrics analyses. In fact, self-citations reveal information in the study of scientific communications that is different but not less valuable than citations received from others. In the practice of self-citation severe ethical issues...

Absztrakt Kozismert teny, hogy a tudomanymetriai mutatoszamok mindegyike erősen fugg a szakterulettől. Sokan ezert eleve idegenkednek e mutatoszamok szakteruletek kozotti barmifele osszehasonlitasatol. A szerző attekinti azokat a lehetősegeket, amelyek a legfontosabb tudomanymetriai mutatoszamok: a publikacioszam, az idezettseg vagy a h-index norma...

Scientometric networks based on the bibliography of Professor Alexandru T. Balaban are analyzed. His position in the topological index research community and the structure of his own co-author network are considered. An analogy is suggested between co-author networks and molecular structures. © 2016, Editions de l'Academie Republique Populaire. All...

In the last decades the share of co-authored and, particularly, multi-authored papers has increased immensely. The paper deals with the causes and consequences of this phenomenon, specifically with those connected with scientometric analyses. Possibilities for fractional count of publications and citations, as well as problems of interpreting h-ind...

Absztrakt Annak, hogy a tudomanyos szakirodalomban egyre novekvő szamu plagiumgyanus esetet eszlelunk, legalabb ket oka van. Egyreszt az erősodő publikacios nyomas hatasara a szerzők, a biralok es a szerkesztők is konnyebben athagjak, illetve elnezik ezt a sulyos etikai vetseget, masreszt a szovegelemző szoftverek fejlődesevel a szovegazonossagok k...

Absztrakt Az esettanulmanyok es esetismertetesek a tudomanyos szakirodalom fontos es egyre novekvő aranyu reszet kepezik. A cikkben megvizsgaljuk ennek a publikacios kategorianak a reszaranyat es idezettseget az egyes szakteruleteken. Altalanossagban igazolodni latszik az a velekedes, hogy a nagyszamu esettanulmany csokkentheti a folyoiratok impakt...

Absztrakt A tudomanymetria legjelentősebb szakmai elismereset, a Derek John de Solla Price-emlekermet 2015-ben az angol Mike Thelwall nyerte el. Thelwall a webometria meghatarozo szemelyisege, a tudomanyos kutatas internetes jelenletet vizsgalja kvantitativ modszerekkel. Ebben a cikkben a webometria kialakulasat, helyzetet es fejlődesi iranyait tek...

The excellent book on multidimensional journal evaluation by Stefanie Haustein helps to find the place of the impact factor in the complex system of journal evaluation indicators. By delimiting the dimensions of evaluation and the user groups, the author of the book creates a framework that serves as a novel and useful guidance both for the lay rea...

Absztrakt Napjainkban eletunket minden eddiginel jobban atszovik a rangsorok. Ez a tudomany vilagaban sincs maskent. A rangsorok keszitőin igen nagy a felelősseg, mert eredmenyeiken sokak karrierjet, egzisztenciajat befolyasolo dontesek mulhatnak. Az ismertetett konyv – ugyan csak a rangsorok egy specialis teruleten – peldat mutat arra, hogy hogyan...

Trends of preferred publication channels in selected categories of Sciences, Social Sciences and Arts & Humanities were studied by determining the percentage share of references in reviews to serials (journals) in all references. It was found that in the period 1995–2014, the fraction of articles published in journals was increasing in all selected...

Since its introduction in 1976, the impact factor is permanently a subject of both criticism and glorification. This paper gives an overview on what actually the reservations and objections attack. A closer look often reveals that the criticisms are not against the specific substantial features of the impact factor. They may formulate much more gen...

Journals published by universities take up a modest part of the scientific literature at the moment, but there are several signs and even more reasons to believe that their significance is rising. Recently, the most significant increase can be detected in social sciences. The top list of university rankings based on journal publishing activity brin...

In order to reveal impacts of natural and social sciences on each other, the authors examined connections between fields of medical and social sciences using a search for references and citations of scientific publication. 1. The largest affinity between the medical and social sciences was found between neurosciences and psychology, but there was a...

The authors studied trends and patterns in the literature of research labeled as clinical (i.e., having the word "clinical" in their title) in the period between 1991 and 2010. The main findings are: 1. The growth of the literature under study was somewhat stronger than that of the overall medical literature. 2. The dominance of the USA is strong b...

Eponyms, scientific concepts named after persons, have a long tradition in medical sciences. Their emergence and use are rather instructive from the aspects of scientometrics, as well. Using a medical sample it is shown that although references to publications giving origin to the eponyms inevitably get obliterated, their citation rate is still man...

This analysis is based on journal papers published in the period 1975-2013 with title words referring to diagnosis or therapy. The literature of both topics is growing dynamically and in an ever accelerating pace. At the same time, the two topics appear to get more and more separated - except for a part of the German-language literature. The share...

I have learned from a late great master of mine (László Vekerdi, Head Librarian at the Hungarian Academy of Sciences) that if I find in a book one sentence to remember, then this book is of remarkable value. I often try to apply this wisdom to value other sources: theater plays, movies, or—why not?—scientific journals.In what follows, the reader ma...

The role of networks is swiftly increasing in the production and communication of scientific knowledge. Network aspects have, therefore, an ever growing importance in the analysis of the scientific enterprise, as well. The present paper demonstrates some techniques of studying the network of scientific journals on the subject of seeking the positio...

It is shown that the “Jaccardized Czekanowski index” is actually a reinterpretation of the Ružička index. Thereby, it is proved that its one-complement is a true distance function, which makes it particularly suitable for use in similarity studies even with multidimensional statistical techniques.

An estimation of the h-index is proposed for cases when the original variable underlying the distribution for which the h-index had been determined was rescaled. Within its validity limits, the approximation can be usefully applied for field normalization, change of time frames or other changes of measurement scales.

In this position paper we discuss the current status of the core scientific journals in China. Based on discussions of journals' relation to a small group of full-text database providers, open access publishing and copyright problems, we conclude that ...

The present paper introduces two independent concepts. X-centage is a statistical indicator characterizing distributions of percentage-valued variables in a vein similar to Hirsch's h-index. Heterodisciplinarity is a measure of polydisciplinarity using the disciplinary categorization of references and/or citations. The Journal Citation Reports data...

The “Jaccardized Czekanowski index”, JCz, an indicator measuring the similarity between the cited and citing journal list of a given journal is proposed in the paper. It is shown that the indicator characterizes the network properties of individual journals and, in aggregated form, also that of subject categories or countries. For subject categorie...

‘Discometrics’, a long neglected area of informetric studies was revisited in a network context. Cooperation between jazz musicians was analysed using the recent ‘Hirschian’ concepts of network informetrics. Partnership Ability Index (φ) was found to be a useful measure to characterize the way performers are embedded in their partnership network. I...

The partnership ability index (φ) combines the number of co-authors and the times each of them acted as co-authors with a given author exactly the same way as Hirsch’s h-index combines the number of publications and their citation rate. The index φ was tested on the sample of the Hevesy medal awardees. It was found that φ is consistent with Glänzel...

Throughout the reform process of the European university system, the importance of collaboration between actors at the academy and other areas of the economy and society are ever increasing, as evidenced by a growing number of co-authored articles and the number of citations to such works. This article analyses the characteristics of publications c...

The paper has the general aim of assessing the worldwide research activity in agricultural and food science and technology as it is reflected by the mainstream journal literature. The specific research questions were as follows: (1) What is the position of the European Research Area (ERA) represented by 33 countries in this study, on the world map...

Two paradigmatic approaches to the normalisation of citation-impact measures are discussed. The results of the mathematical manipulation of standard indicators such as citation means, notably journal Impact Factors, (called a posteriori normalisation) are compared with citation measures obtained from fractional citation counting (called a priori no...

It was demonstrated that the phenomenon of 'Sleeping Beauties' in scientific literature is a rather useful and instructive model in studying the mechanisms of scientific information flow. On the basis of the several idiosyncratic behavioral patterns in the citation histories of Sleeping Beauties and Princes a sketchy typology could be drawn. Furthe...

Hirsch’s concept of h-index was used to define a similarity measure for journals. The h-similarity is easy to calculate from the publicly available data of the Journal Citation Reports, and allows for plausible interpretation. On the basis of h-similarity, a relative eminence indicator of journals was determined: the ratio of the JCR impact factor...

All papers published in the Journal of Radioanalytical and Nuclear Chemistry (JRNC) in the period 2005–2009 (source dataset) and all papers citing these papers and published in other journals (target dataset) have been compiled. A scientometric analysis of the datasets has been performed using Hirsch-type statistics. A comprehensive bibliography of...

Journals covered by the 2006 Science Citation Index Journal Citation Reports database have been subjected to a clustering procedure utilizing h-similarity as the underlying similarity measure. Clustering complemented with a prototyping routine provided well-conceivable results that are both compatible with and further refine existing taxonomies of...

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

In this paper a generalisation of the h-index and g-index is given on the basis of non-negative real-valued functionals defined on subspaces of the vector space generated by the ordered samples. Several Hirsch-type measures are defined and their basic properties are analysed. Empirical properties are illustrated using examples from the micro- and m...

International co-authorship is generally thought and often found to have positive effects on the citation rate of scientific publications. We study the effect quantitatively in the example of four major and four medium Hungarian universities. The conclusions may be generalized to other countries of similar international status.

A new framework of international comparisons is advised: each country is gauged against its bordering countries. This approach has several undeniable drawbacks, but by revealing some otherwise hidden patterns, advantageously supplements the customary comparison methods.

We propose a new node centrality measure in networks, the lobby index, which is inspired by Hirsch’s h-index. It is shown that in scale-free networks with exponent α the distribution of the l-index has power tail with exponent α(α+1). Properties of the l-index and extensions are discussed.

It is shown that a Hirsch-type index can be used for assessing single highly cited publications by calculating the h-index of the set of papers citing the work in question. This index measures not only the direct impact of a publication but also its indirect influence through the citing papers.

Hirsch-type indices are devised for characterizing networks and network elements. Their actual use is demonstrated on scientometric examples, and the potential value of the concept on a practically unlimited range of networks is suggested.

A common problem in comparative bibliometric studies at the meso and micro level is the differentiation and specialisation of research profiles of the objects of analysis at lower levels of aggregation. Already the institutional level requires the application of more sophisticated techniques than customary in evaluation of national research perform...

A common problem in comparative bibliometric studies at the meso and micro level is the differentiation and specialization of research profiles of the objects of analysis at lower levels of aggregation. In this study, institutional profile clusters are used to examine which level of the hierarchical subject classification should preferably be used...

In a follow-up study of a previous analysis concerning the period 1980–1999, we found that inter-/multidisciplinary remained a highlighted title term both in science and social science papers. It is suggested that science policy should give proper priority to inter-and multidisciplinary research.

The authors present ranked lists of world’s countries — with main focus on EU countries (together with newly acceeded and candidate countries) — by their h-index on various science fields. As main source of data Thomson Scientific’s Essential Science Indicators (ESI) database was used. EU countries have strong positions in each field but none of th...

In this note some new fields of application of Hirsch-related statistics are presented. Furthermore, so far unrevealed properties of the h-index are analysed in the context of rank-frequency and extreme-value statistics.

It is suggested that h-indices themselves may form the basis of a series of h-indices at successively higher levels of aggregation. The concept of successive h-indices may usefully contribute to develop a coherent frame for multi-level assessments.

Summary The macro-level country-by-country co-authorship, cross-reference and cross-citation analysis started in our previous paper,1 continues with revealing the cross-national preference stucture of the 36 selected countries. Preference indicators of co-authorship, cross-reference and cross-citation are defined, presented and discussed. The study...

Scientific meetings have become increasingly important channels for scholarly communi-cation. In several fields of applied and engineering sciences they are - according to the statements of scientists active in those fields - even more important than publishing in periodicals. One objective of this study is to analyse the weight of proceedings lite...

The discussion about how to treat author self-citations driven by policy application and quality measurement intensified in the last years. The definition introduced by Snyder and Bonzi has - in lack of any reasonable alternative - been used in bibliometric practice for science policy purposes. This method, however, does not take into account the w...

The objective of the present study is twofold: (1) to show the aims and means of quantitative interpretation of bibliographic features in bibliometrics and their re-interpretation in research policy, and (2) to summarise the state-of-art in self-citation research. The authors describe three approaches to the role of author self-citations and possib...

In this note some new fields of application of Hirsch-related statistics are presented. Furthermore, so far unrevealed properties of the h-index are analysed in the context of rank-frequency and extreme-value statistics.

The discussion about how to treat author self-citations driven by policy application and quality measurement intensified in the last years. The definition introduced by Snyder and Bonzi has - in lack of any reasonable alternative - been used in bibliometric practice for science policy purposes. This method, however, does not take into account the w...

As a first element of a macro-level country-by-country cross-reference and cross-citation analysis, domestic/international character of reference and citation behavior of 36 countries is studied and compared with international co-authorship patterns. Indicators of reference and citation domesticity as well as reference-citation domesticity balance...

Two major multidisciplinary bibliographic databases, the Science Citation Index and the Social Science Citation Index were searched to collect science and social science journal articles published in the 1987–2001 period with the report Our Common Future among their references. A statistical overview is given about the trends and patterns revealed...

Correlation between diabetes-related publication output and diabetes prevalence was sought and found in a sample of world countries and in the states of the US. Various correlation patterns ("demand driven research", "research driven prevention", no correlation) were distinguished and interpreted.

Co-authorship is one of the most tangible and well documented forms of scientific collaboration. Almost every aspect of scientific collaboration networks can be reliably tracked by analysing co-authorship networks by bibliometric methods. In the present study, scientific collaboration is considered both at individual and national levels, with speci...

Scientific meetings have become increasingly important channels for scholarly communication. In this study we explore the use of an important feature of the ISI Proceedings database, namely, of information about conference location for the analysis of information flow such as relative attractivity, mobility and unidirectional or mutual affinity of...

[eng] Transportation costs and monopoly location in presence of regional disparities. . This article aims at analysing the impact of the level of transportation costs on the location choice of a monopolist. We consider two asymmetric regions. The heterogeneity of space lies in both regional incomes and population sizes: the first region is endowed...

Without Abstract

We analyze growing networks ranging from collaboration graphs of scientists to the network of similarities defined among the various transcriptional profiles of living cells. For the explicit demonstration of the scale-free nature and hierarchical organization of these graphs, a deterministic construction is also used. We demonstrate the use of det...

We analyse growing networks ranging from collaboration graphs of scientists to the network of similarities defined among the various transcriptional profiles of living cells. For the explicit demonstration of the scale-free nature and hierarchical organization of these graphs, a deterministic construction is also used. We demonstrate the use of det...

A two-level hierarchic system of fields and subfields of the sciences, social sciences and arts & humanities is proposed. The system was specifically designed for scientometric (evaluation) purposes with the ultimate goal of classifying every single document into a well-defined category. This goal was achieved using a three-step iterative process....

We analyze growing networks ranging from collaboration graphs of scientists to the network ofsimilarities de#ned among the various transcriptional pro#les ofliving cells. For the explicit demonstration ofthe scale-free nature and hierarchical organization ofthese graphs, a deterministic construction is also used. We demonstrate the use ofdeterminin...

The paper is examining the U.S. patenting activity on the application of fullerenes and shows that despite some pessimistic manifestations in this respect in the current literature there are many promising approaches regarding the pragmatic aspects of this field of chemistry.

A survey of references in analytical chemistry over the past decade shows the importance of books.

A statistical overview is given of the first 50 volumes of the journal Scientometrics.Authorship and co-authorship characteristics, as well as citation and reference patterns of the journal are analysed. Geographic and thematic maps of its papers are presented. A brief outlook to the future prospects and challenges is attempted

A survey of references in analytical chemistry over the past decade shows the importance of books.

Characteristics of publication activity and co-authorship in neurosciences are analysed. The present study aims at describing the common, as well as the distinguishing features of productivity and co-publication patterns of four types of authors. For this purpose, authors are classified according to their anterior and posterior records. The role of...

The co-authorship network of scientists represents a prototype of complex evolving networks. In addition, it offers one of the most extensive database to date on social networks. By mapping the electronic database containing all relevant journals in mathematics and neuro-science for an 8-year period (1991–98), we infer the dynamic and the structura...

An attempt is made to find statistical evidences of the relation between international co-authorship and citation impact. It was found that international co-authorship, in average, results inpublications with higher citation rates than purely domestic papers. No correlation has beenfound, however, between the strength of co-authorship links and the...

Without Abstract

After a brief overview of the aims, methods and directions of scientometrics, the research field, a quantitative introduction of its leading journal, Scientometrics is given. Statistical characteristics of its authors, co-authors, references and citations are used to reveal the structure and dynamics of the research community and the intellectual e...

Without Abstract

Database tomography (DT) is a textual database analysis system consisting of two major components: (1) algorithms for extracting multiword phrase frequencies and phrase proximities (physical closeness of the multiword technical phrases) from any type of large textual database, to augment (2) interpretative capabilities of the expert human analyst....

A serious shortcoming of bibliometric studies based on theSocial Sciences Citation Index is the lack of a universally applicable subject classification scheme as individual papers are concerned. Moreover, the selective coverage of more than thousand scientific journals per annum proved to be an insuperable obstacle in the delimitation of social sci...