A human subject laboratory experiment compares the real-time market performance of the two most popular auction formats for online ad space, Vickrey-ClarkeGroves (VCG) and Generalized Second Price (GSP). Theoretical predictions made in papers by Varian (2007) and Edelman, et al. (2007) seem to organize the data well overall. Efficiency under VCG exceeds that under GSP in nearly all treatments. ...

Different from traditional positive sequential pattern mining, negative sequential pattern mining considers both positive and negative relationships between items. Negative sequential pattern mining doesn’t necessarily follow the Apriori principle, and the searching space is much larger than positive pattern mining. Giving definitions and some constraints of negative sequential patterns, this p...

In this paper, we study pricing models for multi-slot advertisements, where advertisers can bid to place links to their sales webpages at one or multiple slots on a webpage, called the multi-slot AD auction problem. We develop and analyze several important mechanisms, including the VCG mechanism for multi-slot ads auction, the optimal social welfare solution, as well as two weighted GSP-like pr...

Recently, there has been a surge of interest in algorithms that allocate advertisement space in an online revenue-competitive manner. Most such algorithms, however, assume a pay-as-you-bid pricing scheme. In this paper, we study the query allocation problem where the ad space is priced using the well-known and widely-used generalized second price (GSP) scheme. We observe that the previous algor...

Evidence suggests the existence of a direct relationship between cellular Gsa content and activation of the adenylyl cyclase system. Data on Gsa levels in endocrine tumors that depend on cAMP for growth, particularly pituitary adenomas, are still limited. The levels of Gsa protein were evaluated in 11 GH-secreting adenomas with Gsa mutations (gsp) and 15 without (gsp). Complementary DNAs from g...

Grape seed proanthocyanidin (GSP) contains polyphenolic bioflavonoids ubiquitously found in the lignified portions of grape seeds from winery and distillery industries, as an antioxidant. To explore its potential a rumen modifier methanogenesis inhibition, 2 × 5 factorial experiment was conducted to determine effect GSP at 0, 15, 30, 60 120 mg/g substrate on fermentation two representative tota...

Pattern mining from the web log data leads to discovery of usage patterns of the user who navigate the web. Patterns which appear frequently in the web log data are item-sets and sequences. In this paper, a novel algorithm Intelligent Generalized Sequential pattern (IGSP) is designed which shows better results than the Generalized Sequential Pattern (GSP) algorithm. Experiment is conducted with...

The generalized spanning tree or group Steiner problem (GSP) is a generalization of the Steiner problem in graphs (SPG): one requires a tree spanning (at least) one vertex of each subset, given in a family of vertex subsets, while minimizing the sum of the corresponding edge costs. Specialized solution procedures have been developed for this problem. In this paper we investigate the performance...

The master field for a subclass of planar diagrams, so called rainbow diagrams, for higher dimensional large N theories is considered. An explicit representation for the master field in terms of noncommutative random variables in the modified interaction representation in the Boltzmannian Fock space is given. A natural interaction in the Boltzmannian Fock space is formulated by means of a ratio...

Poznan Supercomputing and Networking Center has been involved in continuous research concerning the development of grid environments. In the scope of the PROGRESS project we designed a Grid Service Provider (GSP) which acts as a new additional layer between the grid and grid user interfaces. The introduction of the GSP enables easy development of many different grid user interfaces such as web ...