Search for Evergreens in Science: A Functional Data Analysis

Evergreens in science are papers that display a continual rise in annual citations without decline, at least within a sufficiently long time period. Aiming to better understand evergreens in particular and patterns of citation trajectory in general, this paper develops a functional data analysis method to cluster citation trajectories of a sample of 1699 research papers published in 1980 in the American Physical Society (APS) journals. We propose a functional Poisson regression model for individual papers' citation trajectories, and fit the model to the observed 30-year citations of individual papers by functional principal component analysis and maximum likelihood estimation. Based on the estimated paper-specific coefficients, we apply the K-means clustering algorithm to cluster papers into different groups, for uncovering general types of citation trajectories. The result demonstrates the existence of an evergreen cluster of papers that do not exhibit any decline in annual citations over 30 years.Comment: 40 pages, 9 figure

Mass storage technologies for libraries & information centres

To overcome growing requirements for additional space and for archival storage of less used, old and important documents, libraries have been using compact or dormitory storage and microfilming techniques. Of late, information technologies have come to their rescue. Many technologies-magnetic as well as optical have been tried for the past many years for mass storage of information. While magnetic drum and tape are, heading towards obsolescence, optical' technologies with their enormous storage capacities are trying to fill the gap. This paper overviews the various 'technologies available for mass storage in the library environment. The paper covers the magnetic storage devices including magnetic tape, magnetic disc, cartridge tape and digital audio tape. The optical disc storage technologies including read-only, write once read many and erasable/rewritable media have been described. The role of optical discs in making electronic publishing a popular technology has also been described. Future trends in the mass storage technologies like volume holographic technology, electronic trap and proximal probe technologies, and fluorescent multi-layered technology which are under various stages of development have also been briefly discussed. Applications of these technologies in library and information centres. have been listed

Adaptability of buildings: a critical review on the concept evolution

Our ever-evolving built environment is continuously facing emerging needs for housing, work, health, and mobility, among others. Yet, buildings are usually designed and set up as finished permanent objects, reflecting the one constant scenario in mind of defined form, function, and performance. Since change is increasingly inevitable in our life, enlarging buildings’ adaptive capacities in response to arising variables and changing conditions over their lifecycle becomes a necessity in seeking global sustainability demands. The concept of building adaptability has been a notable subject in this respect, increasingly stimulating and proposing regenerative alternatives to today’s often obsolete buildings. This paper critically reviews the existing body of knowledge on the concept of adaptability in building research. The main focus is made on the evolution of the concept interpretations and related paradigms, and on the development of its applications and strategies in the light of promoting models and trends. Drawing on the literature as a source of evidence, the paper analyzes and classifies the content of existing studies published in scientific journals and gray literature, focusing on a timeframe from 2015 up-to-date. Moreover, the paper aims to build a constructive discussion to identify potential gaps between the actual state of the art and emerging needs, which should be addressed by further research.This research was funded by the Portuguese Foundation for Science and Technology, grant number PD/BD/150400/201

Special Libraries, August 1975

Volume 66, Issue 8https://scholarworks.sjsu.edu/sla_sl_1975/1006/thumbnail.jp

Status Report of the DPHEP Study Group: Towards a Global Effort for Sustainable Data Preservation in High Energy Physics

Data from high-energy physics (HEP) experiments are collected with significant financial and human effort and are mostly unique. An inter-experimental study group on HEP data preservation and long-term analysis was convened as a panel of the International Committee for Future Accelerators (ICFA). The group was formed by large collider-based experiments and investigated the technical and organisational aspects of HEP data preservation. An intermediate report was released in November 2009 addressing the general issues of data preservation in HEP. This paper includes and extends the intermediate report. It provides an analysis of the research case for data preservation and a detailed description of the various projects at experiment, laboratory and international levels. In addition, the paper provides a concrete proposal for an international organisation in charge of the data management and policies in high-energy physics

Estudo comparativo dos métodos usados para medir a obsolescência da literatura científica

Comparative study of the methods used to measure the obsolescence rate of scientific literature. There are two ways to approach the published scientific literature decay through the citation analysis: 1) to follow how the citations of a sample collected from published articles decline against time; 2) to chose a sample collected from current literature and observe how the cited sources within are scattered according to their publication date The research was done in the MEDICINE field (specially PULMONAR TUBERCULOSE), and the sources used to get the samples were: the Cumulated Index Medius (CIM) 1964, the Index Medicus (IM) 1975, and the Science Citation Index (SCI) 1964-75. The synchronous decay despite the fact of being more easier to be establishes presents difficulties in relation to the data survey. Its results show in general, a more accurate picture than the diachronous situation but gives an exaggerated rate of literature obsolescence The methods are compared and the results show that there are significant differences among them. They do not have the tendency to be similar. New studies must be done using large scale samples in other fields of human knowledge.Estudo comparativo dos métodos usados para medir a obsolescência da literatura científica. Existem duas maneiras de abordar o declínio da literatura científica publicada através da análise das citações; 1) examinar como um número de referências de uma amostragem de artigos publicados declina com o tempo; 2) tomar uma amostragem da literatura corrente e determinar como as fontes nelas citadas são distribuídas em relação a data de publicação. A pesquisa foi efetuada no campo da Medicina (especificamente TUBERCULOSE PULMONAR), servindo de fontes para o levantamento de dados o Cumulated Index Medicus (CIM) 1964, o Index Medicus (IM) 1975, e o Science Citation Index (SCI) 1964-75 Comparados os métodos, foram detectadas diferenças significantes. O método sincrônico mais fácil de ser estabelecido, apresenta dificuldades em relação ao levantamento de dados. Os resultados demonstram, no geral, um quadro mais acurado que o do método diacrônico, mas apresentam uma exagerada taxa de obsolescência da literatura Foi concluído que tendem mais a diferir que se assemelhar, com resultados sugerindo novos estudos em outros campos do conhecimento, utilizando amostragens em larga escala

A review and evaluation of the Langley Research Center's Scientific and Technical Information Program: Results of phase 6: The technical report. A survey and analysis

Current practice and usage using selected technical reports; literature relative to the sequential, language, and presentation components of technical reports; and NASA technical report publications standards are discussed. The effctiveness of the technical report as a product for information dissemination is considered

High Energy Physics Advisory Panel (HEPAP), meeting agenda, minutes, correspondence, reports, 1973

For more information about this item, visit https://archivesspace.mit.edu/repositories/2/archival_objects/25311