Algorithmic Challenge in Online Advertising -- Parallel Algorithms for Collaborative Filtering -- On the Approximability of Some Haplotyping Problems -- On Acyclicity of Games with Cycles -- Discrete online TSP -- On Approximating an Implicit Cover Problem in Biology -- Power Indices in Spanning Connectivity Games -- Efficiently Generating k-Best Solutions to Procurement Auctions -- Integer Polyhedra for Program Analysis -- Line Segment Facility Location in Weighted Subdivisions -- Algorithms for Placing Monitors in a Flow Network -- Three Results on Frequency Assignment in Linear Cellular Networks -- Link Distance and Shortest Path Problems in the Plane -- Orca Reduction and ContrAction Graph Clustering -- Equiseparability on Terminal Wiener Index -- Effective Tour Searching for TSP by Contraction of Pseudo Backbone Edges -- Optimal Auctions Capturing Constraints in Sponsored Search -- A Note on Estimating Hybrid Frequency Moment of Data Streams -- Two-Level Push-Relabel Algorithm for the Maximum Flow Problem -- A More Relaxed Model for Graph-Based Data Clustering: s-Plex Editing -- Dynamic Position Auctions with Consumer Search -- Nonlinear Optimization over a Weighted Independence System -- Improved Online Algorithms for Multiplexing Weighted Packets in Bounded Buffers -- Latency Constrained Aggregation in Chain Networks Admits a PTAS -- Cutting a Cake for Five People -- PLDA: Parallel Latent Dirichlet Allocation for Large-Scale Applications -- On Job Scheduling with Preemption Penalties.