Linked Data - the story so far

The term “Linked Data” refers to a set of best practices for publishing and connecting structured data on the Web. These best practices have been adopted by an increasing number of data providers over the last three years, leading to the creation of a global data space containing billions of assertions— the Web of Data. In this article, the authors present the concept and technical principles of Linked Data, and situate these within the broader context of related technological developments. They describe progress to date in publishing Linked Data on the Web, review applications that have been developed to exploit the Web of Data, and map out a research agenda for the Linked Data community as it moves forward

Loss Leaders: An Indirect Empirical Test

We apply an indirect method to test for the extent of loss leader pricing. Specifically, the extent of loss leader pricing should increase with the profit from other regularly-priced items. Bookstores customarily use bestsellers as loss leaders. Among conventional bookstores, we found that the bestseller discount systematically increased with the store area, selection of titles, and presence of other product categories. A one standard deviation increase in store area was associated with a 3.7 (± 1.8) higher bestseller percentage discount. Among online stores, we found that the bestseller discount systematically increased with the selection of titles and number of product categories. A one standard deviation increase in selection was associated with a 9.5 (± 2.2) higher bestseller percentage discount.retail pricing, loss leaders, switching costs

Unfolding first-principles band structures

A general method is presented to unfold band structures of first-principles super-cell calculations with proper spectral weight, allowing easier visualization of the electronic structure and the degree of broken translational symmetry. The resulting unfolded band structures contain additional rich information from the Kohn-Sham orbitals, and absorb the structure factor that makes them ideal for a direct comparison with angular resolved photoemission spectroscopy experiments. With negligible computational expense via the use of Wannier functions, this simple method has great practical value in the studies of a wide range of materials containing impurities, vacancies, lattice distortions, or spontaneous long-range orders.Comment: 4 pages, 3 figure

Where People Get Information About Restaurants and Other Local Businesses

Presents survey findings about the demographics and technology profiles of those who seek information about restaurants, bars, and local businesses and their sources of information, including the Internet, newspapers, word of mouth, and local television

The Dot-com Meltdown and the Web

Presents findings from a survey conducted between August and September 2001. Looks at how the collapse of the dot-com economy has had tangible effects on personal lives, and how online Americans have made quick adjustments to the changing Web environment

Development of Ambient PM 2.5 Management Strategies

INE/AUTC 11.2

Open Source vs. Proprietary Software: Competition and Compatibility

e use a Hotelling linear city model to study competition between open source and proprietary software, where only the producer of the proprietary software aims at maximizing the profit. The producer of the proprietary software must decide on compatibility. Different compatibility strategies will lead to different network externality, and thus result in different profit for the producer of the proprietary software. We found that the proprietary producer¡¯s choice of compatibility strategy depends on the market coverage conditions. When the market is fully covered, one-way compatibility is the best strategy for the proprietary software. When the market is partly covered, two-way compatibility is the best strategy. Such results are not affected by software quality. Furthermore, when the provider of the open source software pursues the maximum market share rather than reacts passively, two-way compatibility would be the best choice for both the open source and the proprietary software. Moreover, the proprietary software producer does not favor its proprietary rival changing to open source software. Such a change may lower the social welfare.Open Source Software, Proprietary Software, Compatibility, Competition