133,357 research outputs found
Jeff McDonnell and Krishnan, 1995
No full textJeff McDonnell, Information Technology Services (left) and T B Krishnan, Manager Swinburne Student Union, 1995
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Scientometric portrait of Sir K. S. Krishnan
No full textPublication productivity analysis of K.S. Krishnan is documented
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
On the merging of turbulent spots in a supersonic boundary-layer flow
No full textThe complex transition flow physics associated with the merging of turbulent spots in a Mach 2 boundary-layer has been studied using direct numerical simulation. Dynamics of an isolated turbulent spot, merging of laterally displaced spots, and merging of two spots in tandem are considered. The coherent structures associated with the wingtip region of the spot are found to play a major role in destabilising the surrounding laminar fluid. In the merging of laterally displaced spots a strong velocity defect, resulting in unstable inflectional velocity profiles, is observed in the interaction zone. These local inflectional instabilities within the interaction region trigger new large scale coherent structures. During the inline merging, the calmed region behind the tail of the downstream spot is found to suppress the growth of the upstream spot. The upstream spot is ultimately engulfed by the downstream spot
Raw alignments and phylogenetic tree files (Krishnan et al BMC evolutionary Biology)
No full textRaw alignments and phylogenetic tree files (Krishnan et al BMC evolutionary Biology
Seeing the Invisible. Unveiling Black Hole Horizon Geometry and Dynamics
No full textContains fulltext :
319550.pdf (Publisher’s version ) (Open Access)Black holes are among the most mysterious objects in the Universe. By definition, they are invisible — nothing, not even light, escapes their grasp. Yet, through their interactions, such as collisions or the emission of gravitational waves, we can begin to “see” them. This thesis explores how to uncover the hidden geometry and dynamics of black hole horizons during such events. Using a local, geometric approach called quasi-local horizons and a method known as perturbation theory, the work develops new tools to describe black holes in motion — when they interact, vibrate, or absorb radiation. A key outcome is a way to reconstruct the horizon’s shape and evolution from the gravitational waves detected far away — a technique called black hole tomography. Beyond mergers, the thesis also examines gravitational lensing of waves and the limits of how compact an object can be before it must form a horizon. Altogether, the results show that even the darkest corners of the cosmos can be studied — and understood — by reading the ripples they send across spacetime.Radboud University, 24 juni 2025Promotor : Krishnan, B. Co-promotor : Bonga, B.P.526 p
Effect of Mach number on the structure of turbulent spots
No full textDirect numerical simulations have been performed to study the dynamics of isolated turbulent spots in compressible isothermal-wall boundary layers. Results of a bypass transition scenario at Mach 2, 4 and 6 are presented. At all Mach numbers the evolved spots have a leading-edge overhang, followed by a turbulent core and a calmed region at the rear interface. The spots have an upstream-pointing arrowhead shape when visualized by near-wall slices, but a downstream-pointing arrowhead in slices away front the wall. The lateral spreading of the spot decreases substantially with the Mach number, consistent with a growth mechanism based on the instability of lateral shear layers. Evidence for a supersonic (Mach) mode substructure is found in the Mach 6 case, where coherent spanwise structures are observed under the spot overhang region
Pragmatic Case Studies as a Source of Unity in Applied Psychology
No full textTo unify or not to unify applied psychology: that is the question. In this article we review pendulum swings in the historical efforts to answer this question—from a comprehensive, positivist, “top-down,” deductive yes between the 1930s and the early 60s, to a postmodern no since then. A rationale and proposal for a limited, “bottom-up,” inductive yes in applied psychology is then presented, employing a case-based paradigm that integrates both positivist and postmodern themes and components. This paradigm is labeled “pragmatic psychology” and, its specific use of case studies, the “Pragmatic Case Study Method” (“PCS Method”). We call for the creation of peer-reviewed journal-databases of pragmatic case studies as a foundational source of unifying applied knowledge in our discipline. As one example, the potential of the PCS Method for unifying different angles of theoretical regard is illustrated in an area of applied psychology, psychotherapy, via the case of Mrs. B. The article then turns to the broader historical and epistemological arguments for the unifying nature of the PCS Method in both applied and basic psychology.Peer reviewe
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JNDS, Volume 9, Number 2
No full textLetter from V. Krishnan to the editor discussing a theory of death and reincarnation that implies a process amenable to empirical investigation
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