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Primero | Previo | Siguiente | Último | Artículos 516 al 518 de 518


Unesco (1998). "World Science Report 1996." [Publicación Periódica]. UNESCO, Abril1998, ():1-356.
URL: http://www.unesco.org/science/publication/eng_pub/wsr96en.htm      
Materias:  Cienciometría e Informetría 
Resumen:

"The new edition of this important periodic publication from UNESCO reviews and updates the state of science and technology around the world. It describes and quantifies the recent trends in scientific education and research and development and addresses many of the specific problems faced by each region or group of countries. Some of the most important issues in science and technology of the last few years, of interest both to the scientific community and to society at large, are discussed in the second part of the book. Among these are biodiversity, environmental degradation, the ethics of science and international cooperation in megascience. Particular attention is accorded to recent developments in the new technologies and their impact on society, with chapters on information technology, biotechnology and materials sciences and engineering. The final part is devoted to the gender dimension of science and technology. Its authors, making use of a wide variety of sources, describe the existing disparity in this field, and analyse the main social and educational barriers faced by women in gaining access to scientific careers and decision-making bodies. The World Science Report 1996 is written by an international team of widely regarded authors. It is an essential source of facts, figures and discussion information for all those who want to know how present-day science is organized and how it functions."


Spiliopoulou, Myra; Faulstich, Lukas C. (1998). "WUM: A Tool for Web Utilization Analysis." [Comunicación]. International Workshop on the Web and Databases (WebDB), Marzo1998, ():.
URL: http://viror.wiwi.uni-karlsruhe.de/webmining/bib/pdf/Spiliopoulou1999a.pdf      
Materias:  Minería de datos web 
Resumen:

"We describe the Web Utilization Miner (WUM), designed to evaluate how well the information offered in a web domain meets the user's demands. To this purpose, WWW access logs are aggregated into a specialized data warehouse, over which a new data mining technique is applied. In this paper, we focus on the MINT query language used by the data mining expert to specify the structural and statistical properties of access patterns of potential interest. MINT offers thus a generic way of guiding the mining process over the data.WUM is being implemented in the framework of the WIND (Warehouse for INternet Data) architecture."


Nielsen, Jakob. (1997). "Zipf Curves and Website Popularity" [Sidebar]. Alertbox, Abril1997, ():.
URL: http://www.useit.com/alertbox/zipf.html      
Materias:  Cibermetría 
Resumen:

"Zipf curves follow a straight line when plotted on a double-logarithmic diagram. The figure shows a simple dataset with 300 elements that follow a Zipf distribution. Note how the line connecting the datapoints is linear on the right diagram (with logarithmic scales on both axes). Most of the plots you are used to see have linear scales, so for sake of comparison, the left diagram in the figure has the same datapoints plotted on linear scales."


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