Scientometric Evaluation of Sankhyá - the Indian Journal of Statistics

This paper analyses 199 peer-reviewed articles published in Sankhyā during 2003 to 2007. It examines authorship pattern, collaboration trend among authors, predominant areas of statistical research, and time lag in publications, prolific contributors, degree of collaboration, collaboration density, active sub-domains of statistics and time lag trend. Findings reveal that the number of articles reduced from 24.6% to 14.0% that conforms to the growth trend of statistical publications in India and the author productivity is not in agreement with Lotka’s law. The study also shown an average time lag of fifteen months to publish an article, and a declining trend of time lags following second-degree polynomial type has been observed in this scholarly journal

Gastric adenocarcinoma in a patient re-infected with H. pylori after regression of MALT lymphoma with successful anti-H. pylori therapy and gastric resection: a case report

BACKGROUND: Helicobacter pylori (H. pylori) has been etiologically linked with primary gastric lymphoma (PGL) and gastric carcinoma (GC). There are a few reports of occurrence of both diseases in the same patient with H. pylori infection. CASE PRESENTATION: We report a patient with PGL in whom the tumor regressed after surgical resection combined with eradication of H. pylori infection. However, he developed GC on follow up; this was temporally associated with recrudescence / re-infection of H. pylori. This is perhaps first report of such occurrence. CONCLUSIONS: Possible cause and effect relationship between H. pylori infection and both PGL and GC is discussed. This case also documents a unique problem in management of PGL in tropical countries where re-infection with H. pylori is supposed to be high

Scientometric evaluation of Sankhyá – the Indian Journal of Statistics

This paper critically analyses 199 peer-reviewed articles published in Sankhyā during 2003 to 2007. It examines authorship pattern, collaboration trend among authors, predominant areas of statistical research, and time lag in publications. Subsequent analysis focuses on prolific contributors, degree of collaboration, collaboration density, active sub-domains of statistics and time lag trend. Findings reveal the following: (a) the number of articles reduced from 24.6% to 14.0% that conforms to the growth trend of statistical publications in India; (b) single-authored paper counts only 30%, the rest in collaboration either by two-authors (47%) or three-to-fiveauthors (23%) and average authorship accounts for 1.96 per paper; (c) contributors of Sankhyā worked in highly collaborative manner and the degree of collaboration (CC=0.698) is quite significant; and (d) most of the bilateral and multilateral collaborations has emanated from 12 institutions of 5 different countries. Ranked list of prolific authors has been carried out using fractional counting method. It is observed that author productivity is not in agreement with Lotka’s law, but productivity distribution data partially fits the law when the value of approximated to 2.77 and the number of papers does not exceed two. Broad subject clusters, such as statistics (153) and probability theory (38) constituted about 96% of the contributed articles. Nonparametric inference (18%), parametric inference (15%), design of experiments (10%) and multivariate analysis (8%) are found to be active areas of research in statistics. The study shows an average time lag of fifteen months to publish an article, and a declining trend of time lags following second-degree polynomial type has been observed in this scholarly journal

An Evaluative Study on Citation Pattern of Sankhya

This study analyses 3750 citations appended to 199 peer-reviewed articles published in Sankhya during 2003 to 2007. Critical examinations have been made on average citations occurred in each publication, various source materials cited, highly cited keywords, frequently cited journals, and identifying the core journals in statistical research. Bradfor’s scattering of cited journals (zonal distribution) has also been carried out. Findings reveal that an average of 18.84 cited references were appended in each publication, and thereby reinforces the proposition of discipline oriented citation behavior of scholarly literatures. The paper illustrates wide variety of source materials, where journal-articles get cited predominantly and the citation of web-resources is very poor; thus citation behavior of Sankhya exhibits a close resemblance with the usual practice of S&T journals. It suggests an average of five keywords to be transcribed by the authors in each article. The study identifies a total of 2732 journal-citations in 372 unique titles, thus journal citation density is derived as 7.35. In fact top 12 journals have contributed more than 50% citations, subsequently top five (core journals) received more than one-third (34%) of the total journal-citations. Annals of Statistics is the most highly cited journal; followed by JASA, Biometrika, JRSS-B, and Annals of Mathematical Statistics. Bradford’s plot (cumulative citations vs. logarithm of journal ranks) presents a deviation of classical S curve. Above all Sankhya could stake claim as one of the most authoritative source of scholarly literatures on statistics and allied areas of research

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We present a search-based method for the generation of a terrainadaptive optimal gait of a six-legged walking machine. In this, several heuristic rules have been proposed to reduce the search effort. We identify the useful support states of the machine and form a table to indicate for each of these states the list of other states to which a transition can be made. This helps in converging to and maintaining a periodic gait through a limited search while retaining adequate options to deviate from such a gait as and when needed. The criterion for optimization is coded into a function that evaluates the promise of a node in the search graph. We have shown how this function may be designed to generate the common periodic gaits like the wave gait, the equal phase gait, and the follow-the-leader gait. The purpose is to demonstrate that the proposed method is sufficiently general and can cater to a wide range of optimizing requirements. KEY WORDS—walking machine, graph search, heuristic search, periodic gait, free gait 1

An Efficient Algorithm to Compute a Steiner Set and Steiner Tree on Trapezoid Graphs

[[abstract]]This paper presents an ecient algorithm to compute a minimum cardinality Steiner set and Steiner tree on trapezoid graphs. The algo- rithm takes O(m+n p log C) time for a trapezoid graph with n vertices and m edges, where cost of each arc is a non-negative integer number bounded by C