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- item-4 hasContent wen-zhang.
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- item-6 hasContent zheng-chen.
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- 28 type InProceedings.
- 28 label "Web Service Derivatives".
- 28 sameAs 28.
- 28 abstract "Web service development and usage has shifted from simple information processing services to high-value business services that are crucial to productivity and success. In order to deal with an increasing risk of unavailability or failure of mission-critical Web services we argue the need for advanced reservation of services in the form of derivatives. The contribution of this paper is twofold: First we provide an abstract model of a market design that enables the trade of derivatives for mission-critical Web services. Our model satisfies requirements that result from service characteristics such as intangibility and the impossibility to inventor services in order to meet fluctuating demand. It comprehends principles from models of incomplete markets such as the absence of a tradeable underlying and consistent arbitragefree derivative pricing. Furthermore we provide an architecture for a Web service market that implements our model and describes the strategy space and interaction of market participants in the trading process of service derivatives. We compare the underlying pricing processes to existing derivative models in energy exchanges, discuss eventual shortcomings, and propose Wavelets as a preprocessing tool to analyze actual data and extract long- and short-term seasonalities.".
- 28 hasAuthorList authorList.
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- 28 keyword "Internet Monetization".
- 28 title "Web Service Derivatives".
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- item-1 hasContent thomas-meinl.
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- item-2 hasContent benjamin-blau.
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- 29 type InProceedings.
- 29 label "Efficient Application Placement in a Dynamic Hosting Platform".
- 29 sameAs 29.
- 29 abstract "Web hosting providers are increasingly looking into dynamic hosting to reduce costs and improve the performance of their platforms. Instead of provisioning fixed resources to each customer, dynamic hosting maintains a variable number of application instances to satisfy current demand. While existing research in this area has mostly focused on the algorithms that decide on the number and location of application instances, we address the problem of efficient enactment of these decisions once they are made. We propose a new approach to application placement and experimentally show that it dramatically reduces the cost of application placement, which in turn improves the end-to-end agility of the hosting platform in reacting to demand changes.".
- 29 hasAuthorList authorList.
- 29 isPartOf proceedings.
- 29 keyword "Performance, Scalability and Availability".
- 29 title "Efficient Application Placement in a Dynamic Hosting Platform".
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- item-1 hasContent zakaria-al-qudah.
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- item-2 hasContent hussein-a-alzoubi.
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- item-3 hasContent mark-allman.
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- item-4 hasContent michael-rabinovich.
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- item-5 hasContent vincenzo-liberatore.
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- 3 type InProceedings.
- 3 label "Spatio-Temporal Models for Estimating Click-through Rate".
- 3 sameAs 3.
- 3 abstract "We propose novel spatio-temporal models to estimate clickthrough rates in the context of content recommendation. We track article CTR at a fixed location over time through a dynamic Gamma-Poisson model and combine information from correlated locations through dynamic linear regressions, significantly improving on per-location model. Our models adjust for user fatigue through an exponential tilt to the firstview CTR (probability of click on first article exposure) that is based only on user-specific repeat-exposure features. We illustrate our approach on data obtained from a module (Today Module) published regularly on Yahoo! Front Page and demonstrate significant improvement over commonly used baseline methods. Large scale simulation experiments to study the performance of our models under different scenarios provide encouraging results. Throughout, all modeling assumptions are validated via rigorous exploratory data analysis.".
- 3 hasAuthorList authorList.
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- 3 keyword "Data Mining".
- 3 title "Spatio-Temporal Models for Estimating Click-through Rate".
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- item-1 hasContent deepak-agarwal.
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- item-2 hasContent bee-chung-chen.
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- item-3 hasContent pradheep-elango.
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- 30 type InProceedings.
- 30 label "Network-Aware Forward Caching".
- 30 sameAs 30.
- 30 abstract "This paper proposes and evaluates a Network Aware Forward Caching approach for determining the optimal deployment strategy of forward caches to a network. A key advantage of this approach is that we can reduce the network costs associated with forward caching to maximize the benefit obtained from their deployment. We show in our simulation that a 37% increase to net benefits could be achieved over the standard method of full cache deployment to cache all POPs traffic. In addition, we show that this maximal point occurs when only 68% of the total traffic is cached. Another contribution of this paper is the analysis we use to motivate and evaluate this problem. We characterize the Internet traffic of 100K subscribers of a US residential broadband provider. We use both layer 4 and layer 7 analysis to investigate the traffic volumes of the flows as well as study the general characteristics of the applications used. We show that HTTP is a dominant protocol and account for 68% of the total downstream traffic and that 34% of that traffic is multimedia. In addition, we show that multimedia content using HTTP exhibits a 83% annualized growth rate and other HTTP traffic has a 53% growth rate versus the 26% over all annual growth rate of broadband traffic. This shows that HTTP traffic will become ever more dominent and increase the potential caching opportunities. Furthermore, we characterize the core backbone traffic of this broadband provider to measure the distance travelled by content and traffic. We find that CDN traffic is much more efficient than P2P content and that there is large skew in the Air Miles between POP in a typical network. Our findings show that there are many opportunties in broadband provider networks to optimize how traffic is delivered and cached.".
- 30 hasAuthorList authorList.
- 30 isPartOf proceedings.
- 30 keyword "Performance, Scalability and Availability".
- 30 title "Network-Aware Forward Caching".
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