Understanding the user - why, what and how?

Explains the need, importance, purposes and scope of user studies, discusses procedure for conducting sound user studies together with associated problems of research like selection of problem, formulation of hypothesis, design of study, sampling strategy, data collection methods, scaling techniques, pilot study, processing and analysis of data, testing of hypothesis, interpretation, drawing inferences, communication and dissemination of results and finally concludes by highlighting methodological flaws and gaps in user studies

The task of digital information management

This paper tries to contrast digital decay with paper decay, explains how digitisation further accelerates accessing information through the trio factors accessibility, ease of use and perceived utility. Also discusses related issues including proliferation of gray content on the Web

Pattern of card catalogue consultation in a special library

A three day sample observation of card catalogue consultation by users at ISRO Satellite Centre (ISAC) Library has been made and results recorded. Users have been subsequently questioned about the purposes for which catalogue was consulted. The paper describes the card catalogue system of the library, the method followed and limitations of the study. The data in appropriate tables has revealed that classified catalogue is not used; Report Number Catalogue is least used and subject catalogue is consulted to the maximum. It is also found that more than half of the consultations of card catalogue are to locate documents, one-fourth is to interact with circulation system, one-tenth is to make a comprehensive search for references on a topic and rest for miscellaneous purposes. It is concluded, based on the results, that arrangement of charged out tray at circulation counter be changed to classified order and classified catalogue itself may have to be dispensed with

Resource sharing and networking of engineering college libraries

This lecture on resource sharing and networking of engineering college libraries in Karnataka delivered at the second annual seminar of ASSIST (Asian Society for Social Service, Information Science and Technology) explains the need for resource sharing, enumerates the buzz words relating to "cooperation" and "e-revolution", points out the inherent limitations as well as certain facts and hurdles in the process of resource sharing. It examines cost considerations of resources versus their use considerations as well as strength of resources versus strength of user need considerations. The lecture enumerates various possibilities and areas for resource sharing. In conclusion, some suggestions and tips are offered to overcome the hurdles for effective resource sharing. Two case studies, namely subscription to e-journals and user-orientation at ISAC (ISRO Satellite Centre) library are also presented

Something about the structure of the Galaxy

We analyse a sample of 507 evolved stars in the inner galactic Plane. We derive average ages for subsets of this sample and use those sets as beacons for the evolution of the Galaxy. In the Bulge the oldest OH/IR stars in the plane are 7.5 Gyr, in the Disk 2.7 Gyr. The vertical distribution of almost all AGB stars in the Disk is found to be nearly exponential, with scaleheight increasing from 100 pc for stars of \lsim 1 Gyr to 500 pc for stars of \gsim 5 Gyr. There may be a small, disjunct population of OH/IR stars. The radial distribution of AGB stars is dictated by the metallicity gradient. Unequivocal morphological evidence is presented for the existence of a central Bar, but parameters can be constrained only for a given spatial-density model. Using a variety of indicators, we identify the radii of the inner ultra-harmonic (2.5 kpc) and corotation resonance (3.5 kpc). We show that the 3-kpc arm is likely to be an inner ring, as observed in other barred galaxies, by identifying a group of evolved stars that is connected to the 3-kpc HI filament. Also, using several observed features, we argue that an inner-Lindblad resonance exists, at $\sim$1-1.5 kpc. The compositions of OH/IR populations within 1 kpc from the galactic Centre give insight into the bar-driven evolution of the inner regions. We suggest that the Bar is $\sim$8 Gyr old, relatively weak (SAB) and may be in a final stage of its existence.Comment: 18 pages, 15 figures, TeX, accepted for publication in MNRA

Learning functional object categories from a relational spatio-temporal representation

Abstract. We propose a framework that learns functional objectcategories from spatio-temporal data sets such as those abstracted from video. The data is represented as one activity graph that encodes qualitative spatio-temporal patterns of interaction between objects. Event classes are induced by statistical generalization, the instances of which encode similar patterns of spatio-temporal relationships between objects. Equivalence classes of objects are discovered on the basis of their similar role in multiple event instantiations. Objects are represented in a multidimensional space that captures their role in all the events. Unsupervised learning in this space results in functional object-categories. Experiments in the domain of food preparation suggest that our techniques represent a significant step in unsupervised learning of functional object categories from spatio-temporal patterns of object interaction.