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The purpose of this paper is to present such an analytical framework for analyzing Government Interoperability Frameworks (GIFs) and to do a comparative analysis of a set of GIFs using the analytical framework. Based on the comparative analysis, the paper presents a set of recommendations useful for new GIF initiatives.

Drawing on literature and personal knowledge and experience, an analytical framework is proposed for qualitative comparison of GIFs. The analytical framework is based on three core areas of interoperability frameworks – context, content, and process. A total of 21 GIFs are analyzed and evaluated against the framework. The primary sources of information for the study are the interoperability framework documents. In some cases, published articles, brochures, etc. are used as additional sources of information.

The comparative analysis shows that the analytical framework adequately covers all the features of the GIFs. Comparative analysis also shows that most of the GIFs concentrate mainly on technical and syntactical aspects only. Organizational and semantic issues are covered only by a handful of GIFs. At the policy level, most common interoperability policies are found to be: the universal adoption of common specifications used on the internet and world wide web, use of XML for data integration and data management, and use of open standards for all public sector information systems. Regarding management of GIF, it is found that German, Greek and New Zealand GIFs document the process of standards life cycle management in a much better way, whereas UK e‐GIFs' coverage of management and compliance mechanism of GIF is excellent. Overall, it is found that the UK e‐GIF is one of the most mature and exhaustive on all counts. German – Standards und Architekturen f¨r eGovernment‐Anwendungen on the other hand is found to be a unique effort. It incorporates features of both an enterprise architecture and those of an interoperability framework.

The contribution of the study is substantial for academia and practitioners. For academics, this framework can be used in future research as a tool to benchmark and grade GIFs. The practitioners, on the other hand, can use the study, to identify various essential features of a GIF which can be very useful for new GIF initiatives. The six‐layered e‐government technical architecture discussed here can be used to check the current status of technical interoperability in an organization and to identify gaps in the technology coverage.

Lighting in building sectors (consumes the highest energy in commercial buildings and the second highest in residential buildings in India) has very much potential for energy conservation in buildings. With the use of daylighting system, energy consumption in lighting can be lowered up to 30 to 40 per cent.

An experimental effort has been made in this paper to explore the internal wall coloring effect on the performance of tubular light pipe. Trace-pro software has been used and validated. With the help of this software, light pipe has been designed and simulated in a ray tracing mode. Assessment of four globally used prediction models has also been conducted to compare the performances in different seasons for light pipes in the composite climate of New Delhi.

It has been conducted based on three statistical indicators as mean bias error, root mean square error and R². Using regression, an empirical model for average internal illuminance has been developed as a function of light reflectance value (LRV) and solar altitude angle. Trace-pro results confirmed that maximum internal illuminance can be obtained with wall surfaces coated with high LRV color. Finally, by using of a single light pipe system for a test room with the artificial lighting system and applying continuous dimming control, the amount of electrical energy has been saved up to 38.5 per cent per year.

After going through the literature, it has been identified that there has been no paper published which explores the effect of colors of the internal walls on the performance of the light pipe. Along with this, the comparison between existing empirical performance models and find out which model gives the best result in different seasons has been carried out for New Delhi, India.