Journals under threat: A joint response from history of science, technology and medicine editors

Dalen, Benno van

doi:10.1016/j.hm.2008.10.001

Cited by 2 publications

(3 citation statements)

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“…However, the generalization to complex variables is straightforward and does not change our conclusions. For that purpose we use the Bézout's identity [33] stating:…”

Section: Non-harmonic Revival Of Expectation Valuesmentioning

confidence: 99%

Quantum revivals and magnetization tunneling in effective spin systems

et al. 2016

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Quantum mechanical objects or nano-objects have been proposed as bits for information storage. While time-averaged properties of magnetic, quantum-mechanical particles have been extensively studied experimentally and theoretically, experimental investigations of the real time evolution of magnetization in the quantum regime were not possible until recent developments in pump-probe techniques. Here we investigate the quantum dynamics of effective spin systems by means of analytical and numerical treatments. Particular attention is paid to the quantum revival time and its relation to the magnetization tunneling. The quantum revival time has been initially defined as the recurrence time of a total wave-function. Here we show that the quantum revivals of wave-functions and expectation values in spin systems may be quite different which gives rise to a more sophisticated definition of the quantum revival within the realm of experimental research. Particularly, the revival times for integer spins coincide which is not the case for half-integer spins. Furthermore, the quantum revival is found to be shortest for integer ratios between the on-site anisotropy and an external magnetic field paving the way to novel methods of anisotropy measurements. We show that the quantum tunneling of magnetization at avoided level crossing is coherent to the quantum revival time of expectation values, leading to a connection between these two fundamental properties of quantum mechanical spins.

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“…However, the generalization to complex variables is straightforward and does not change our conclusions. For that purpose we use the Bézout's identity [33] stating:…”

Section: Non-harmonic Revival Of Expectation Valuesmentioning

confidence: 99%

Quantum revivals and magnetization tunneling in effective spin systems

et al. 2016

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“…With the exception of psychology, economics, and management 3 , research evaluations are highly controversial in the humanities and social sciences. Some initiatives to develop instrument for research assessment in the humanities stirred strong rejections by the scholars (e.g., the European Reference Index for the Humanities, ERIH, see Andersen et al 2009; or the research rating of the German Council of the Science and Humanities, see Plumpe 2009). Therefore, the idea of the project «Developing and Testing Research Quality Criteria in the Humanities» was to learn from these experiences and analyse the reasons for the rejections of evaluation tools and procedures first.…”

Section: Framework To Develop Quality Criteria For Researchmentioning

confidence: 99%

“…Third, humanities scholars fear dysfunctional effects of the use of quantitative indicators, e.g. loss of diversity (see Andersen et al 2009). Fourth, there is a lack of consensus on research topics and on the meaningful use of methods.…”

Section: Framework To Develop Quality Criteria For Researchmentioning

confidence: 99%

Quality criteria for sociology? What sociologists can learn from the project «developing and testing research quality criteria in the humanities»

Ochsner¹,

Wolbring²,

Hug³

2015

Sociologia E Politiche Sociali

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Universities take an important role in the knowledge-society. For reasons of accountability to the public or in order to assure or enhance research quality, many universities implemented assessment procedures, often using bibliometric and other performance indicators. These procedures are mostly developed in a data-driven manner and not much is known about what the indicators in these procedures actually measure and how they affect behavior. Furthermore, the methods stem from the natural and life sciences and cannot be readily transferred to the social sciences and humanities. In this article, we present (i) quality criteria for research from the perspective of humanities scholars and how they can be transferred to sociology (ii) summarise the opportunities and limitations of the research rating of the German Council of Science and Humanities, and (iii) suggest that sociology as a discipline should develop a discipline-specific approach to research evaluation that takes into account the sociology scholars' notions of quality and the disciplines' research practices, that is bottom-up in nature, and uses both quantitative as well as qualitative data.

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Journals under threat: A joint response from history of science, technology and medicine editors

Cited by 2 publications

References 0 publications

Quantum revivals and magnetization tunneling in effective spin systems

Quantum revivals and magnetization tunneling in effective spin systems

Quality criteria for sociology? What sociologists can learn from the project «developing and testing research quality criteria in the humanities»

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