Jochen Gläser

Technische Universität Berlin

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Co-Authors

Grit Laudel

Technische Universität Berlin

Hans‐Jürgen Meyer

University of Tübingen

Sonja Tragl

University of Tübingen

Markus Ströbele

University of Tübingen

Katharina Gibson

University of Tübingen

Guibin Ma

Institute of Hydrobiology

Frank Havemann

Humboldt-Universität zu Berlin

H.‐Juergen Meyer

University of Tübingen

Mikhail Maliarik

Linköping University

Leonid Unverfehrt

University of Tübingen

Cooperative Institutions

University of Tübingen

Technische Universität Berlin

Vilnius University

Max Planck Society

KTH Royal Institute of Technology

Stockholm University

Centre National de la Recherche Scientifique

Technical University of Munich

Linköping University

Institute of Inorganic Chemistry of the Slovak Academy of Sciences

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Cold Atom Gases, Hedgehogs, and Snakes: The Methodological Challenges of Comparing Scientific Things

Nature and Culture (2015)

Jochen Gläser Grit Laudel

While several “grand narratives” have been developed to account for the impact of scientific things on scientific practice, there is still very little methodological support for comparative analyses of scientific things. The goal of our article is to sketch the methodological challenges involved in comparatively analyzing scientific things and including their properties in middle-range theories of scientific practice. Methodological challenges arise from the necessity to use scientists' accounts of scientific things, the dilemma between depth and breadth of comparative case-study approaches, and from the necessity to compare accounts of scientific things to each other as well as to social conditions of research. Since the dominant approaches to the study of scientific things avoid the middle levels of abstraction, we suggest using an approach based on a theory of action. Two examples from a recent study of conditions for scientific innovations illustrate our approach to the comparative analysis of properties of scientific things.

Sketch

Abstraction

Scientific literature

10.3167/nc.2015.100304

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Citations (7)

Intraorganisational evaluation: are there ‘least evaluable units’?

Research Evaluation (2004)

Jochen Gläser Tom Spurling Linda Butler

An increasing number of universities and research organisations are introducing internal evaluations which are often based on quantitative indicators. However, it is likely that a ‘least evaluable unit’ (LEU) exists in every research organisation, and that below this level many standard quantitative performance indicators no longer provide a valid measure of performance. In this paper, the LEU of a research organisation is identified by analysing retrospective performance evaluations at different levels of aggregation and enhancing their interpretation with the detailed knowledge of the organisation's senior manager. The main obstacles to further disaggregation below the LEU are that indicators lose their statistical validity because of low numbers of publications and that the performance of subunits cannot be independently measured. The latter phenomenon is heightened at the level of scientists because work roles emerged that further clouded the application of performance measures to individuals.

Phenomenon

Performance indicator

10.3152/147154404781776554

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Citations (16)

Crystal Structures, Phase-Transition, and Photoluminescence of Rare Earth Carbodiimides

Inorganic Chemistry (2008)

Jochen Gläser Leonid Unverfehrt Helga Bettentrup Günter Heymann Hubert Huppertz

Rare earth carbodiimides with the general formula RE 2(CN 2) 3 crystallize with two modifications. A monoclinic( C2/m) modification is obtained for RE = Y, Ce-Tm and a rhombohedral ( R3 c) modification for RE = Tm-Lu. The space group R3 c is confirmed by single-crystal structure determination on Lu 2(CN 2) 3 and indexed powder patterns of RE = Tm, Yb and Lu. The use of diverse chemical syntheses conditions for Tm 2(CN 2) 3 revealed the dimorphic character of this compound. In addition, pressure experiments on Tm 2(CN 2) 3 have induced a phase-transition from rhombohedral to monoclinic. This transformation comprises an increase of the coordination number of Tm from 6 to 7, and a unit-cell volume reduction in the order of 20 %. The photoluminescence behavior of lanthanide doped Gd 2(CN 2) 3:Ln samples is presented with different activators (Ln = Ce, Tb) revealing a broad band emission of Gd 2(CN 2) 3:Ce, quite similar to that of the well-known YAG:Ce.

Crystal (programming language)

10.1021/ic800985k

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Citations (58)

The Limits of Universality

Oxford University Press eBooks (2010)

Jochen Gläser Stefan Lange Grit Laudel Uwe Schimank

This chapter examines the ways in which differences between scientific fields affect the impact of changing authority relations on research goals and approaches. Comparing proximate and remote epistemic properties on research in six disciplines in the sciences and humanities, it shows how variations in resource dependence, research portfolio diversity, and other factors have impinged upon scientists' responses to resource scarcity and state restructuring in academic governance in Australia, as well as how these factors in turn reflect more deep-seated features of research styles, such as the role of personal interpretation in problem formulation, decomposability of research problems, and mode of access to empirical evidence.

Restructuring

Scarcity

Resource dependence theory

10.1093/acprof:oso/9780199590193.003.0010

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Citations (37)

Estimating Thematic Similarity of Scholarly Papers with Their Resistance Distance in an Electric Network Model

arXiv (Cornell University) (2013)

Frank Havemann Michael G. Heinz Jochen Gläser Alexander Struck

We calculate resistance distances between papers in a nearly bipartite citation network of 492 papers and the sources cited by them. We validate that this is a realistic measure of thematic distance if each citation link has an electric resistance equal to the geometric mean of the number of the paper's references and the citation number of the cited source.

Similarity (geometry)

Thematic map

10.48550/arxiv.1303.0089

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Citations (0)

CCDC 177376: Experimental Crystal Structure Determination

The Cambridge Structural Database (2003)

Guibin Ma A. Fischer Andrey B. Ilyukhin Jochen Gläser

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.

Crystal (programming language)

10.5517/cc5yktg

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Citations (0)

Wissenschaftliche Produktionsgemeinschaften: die soziale ordnung der forschung [Scientific Production Communities. The Social Order of Research]

Campus Verlag eBooks (2006)

Jochen Gläser

Social production

Source

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Citations (52)

The Impact of Institutional Reforms on the Nature of Universities as Organisations

Research in the sociology of organizations (2014)

Richard Whitley Jochen Gläser

Recent reforms to higher education systems in many OECD countries have focused on making universities more effective organisations in competing for resources and reputations. This has often involved increasing their internal cohesion and external autonomy from the state to make them more similar to private companies. However, pre-reform universities differed so greatly in their governance and capabilities that the impact of institutional changes has varied considerably between three ideal types: Hollow, State-chartered, and Autarkic. Furthermore, the combination of: (a) the inherent uncertainty of scientific research undertaken for publication, (b) limited managerial control over work processes and reputations, and (c) the contradictory effects of some funding and governance changes has greatly restricted the ability of universities to function as authoritatively integrated organisations capable of developing distinctive competitive competences.

Cohesion (chemistry)

10.1108/s0733-558x20140000042000

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Citations (35)

ChemInform Abstract: W6Cl18: New Syntheses, New Structure Refinement, Electronic Structure, and Magnetism.

ChemInform (2001)

Andreas Naegele Jochen Gläser H.‐Juergen Meyer

Abstract 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.

Magnetism

10.1002/chin.200118021

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Citations (0)

Refined Crystal Structure and Idealized Structure of Mixed-Valent Eu₄F₅(CN₂)₂: Transition Possible

Inorganic Chemistry (2011)

Leonid Unverfehrt Markus Ströbele Jochen Gläser Thorsten Langer Rolf‐Dieter Hoffmann

The new europium fluoride carbodiimide Eu(4)F(5)(CN(2))(2) was synthesized by solid state reaction from mixtures of EuF(3) and Li(2)(CN(2)) at 700 °C. The crystal structure as refined by single crystal X-ray diffraction (P ̅42(1)c, no. 114, a = 16.053(1) Å, c = 6.5150(6) Å, Z = 8) reveals three crystallographically distinct [N═C═N](2-) ions in the structure of mixed-valent Eu(4)F(5)(CN(2))(2). The presence of one Eu(3+) and three Eu(2+) per formula unit Eu(4)F(5)(CN(2))(2) is confirmed by magnetic measurements and (151)Eu-Mössbauer spectroscopy. The arrangement of Eu ions and gravity centers of [NCN](2-) ions in the structure of Eu(4)F(5)(CN(2))(2) follow the motif formed by atoms in the CuAl(2)-type structure. A possible high-symmetry structure of Eu(4)F(5)(CN(2))(2) is discussed on the basis of a group-subgroup scheme.

Europium

10.1021/ic102556u

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Citations (10)