Yahoo!

About: Yahoo! is a company organization based out in London, United Kingdom. It is known for research contribution in the topics: Population & Web search query. The organization has 26749 authors who have published 29915 publications receiving 732583 citations. The organization is also known as: Yahoo! Inc. & Maudwen-Yahoo! Inc.

Revenue analysis of a family of ranking rules for keyword auctions

Abstract: Keyword auctions lie at the core of the business models of today's leading search engines. Advertisers bid for placement alongside search results, and are charged for clicks on their ads. Advertisers are typically ranked according to a score that takes into account their bids and potential click-through rates. We consider a family of ranking rules that contains those typically used to model Yahoo! and Google's auction designs as special cases. We find that in general neither of these is necessarily revenue-optimal in equilibrium, and that the choice of ranking rule can be guided by considering the correlation between bidders' values and click-through rates. We propose a simple approach to determine a revenue-optimal ranking rule within our family, taking into account effects on advertiser satisfaction and user experience. We illustrate the approach using Monte-Carlo simulations based on distributions fitted to Yahoo! bid and click-through rate data for a high-volume keyword.

Map-based interfaces for storing and locating information about geographical areas

Abstract: User interfaces and computer enabled methods for defining, discovering, and viewing map layers are provided. The map layers annotate an existing map by providing additional information that is not present in the existing map. A contribution user interface receives and configures the map layer on a web browser. The contribution user interface allows the map layer to be positioned over a desired location and displayed as a semi-transparent image overlay superimposed over the existing map. The map layer may be enlarged, reduced, and rotated to match the features of the existing map. The map layer is stored for use by other users. The layer may be retrieved by users who search for the desired location or for related or nearby locations. The layer may be displayed as a search result, and may be displayed for viewing by users as a partially-transparent image overlay over the existing map.

Investigating the Antimicrobial Activity of Natural Honey and Its Effects on the Pathogenic Bacterial Infections of Surgical Wounds and Conjunctiva

Abstract: Antimicrobial activities of 10–100% (wt/vol) concentrations of new honey, stored honey, heated honey, ultraviolet-exposed honey, and heated stored honey were tested against common human pathogens, including Escherichia coli, Entrobacter cloacae, Pseudomonas aeruginosa, Shigella dysenteriae, Klebsiella sp., Haemophilus influenzae, Proteus sp., Staphylococcus aureus, Streptococcus hemolyticus group B, and Candida albicans. Antimicrobial activity of honey was tested in acidic, neutral, or alkaline media. These were compared with similar concentrations of glucose in nutrient broth. Surgical wounds were made on the dorsum of mice and infected with S. aureus or Klebsiella sp. The wounds were treated with local application of honey four times a day or appropriate antibiotics and compared with control values. Bacterial conjunctivitis due to E. coli, Proteus sp., S. aureus, Klebsiella sp., and P. aeruginosa was induced in rats. Conjunctival application of honey four times a day or appropriate antibiotics was used ...

Faceted identity, faceted lives: social and technical issues with being yourself online

Abstract: This paper explores key issues people experience managing personal boundaries within and across social technologies. We look in particular at email and online social networks. We offer a theoretical framework for understanding the errors in assumptions about the singularity of identity that are currently inscribed into the sharing models of social technology systems. Through a questionnaire study we examine how people facet their identities and their lives, and how these facets are expressed through use of email and Facebook. We found family was an extremely important context for sharing online, and that email was still a preferred form of communication for private sharing across facets of life. Single, working men had the highest level of incompatible facets, and a higher level of facet incompatibility was correlated with increased email usage and worry about sharing in the context of social networks.