list of accepted papers for ISAAC 2006 (1) Erik Demaine, MohammadTaghi Hajiaghayi and Ken-ichi Kawarabayashi. Algorithmic Graph Minor Theory: Improved Grid Minor Bounds and Wagner's Contraction (2) Amos Korman, David Peleg and Yoav Rodeh. Constructing Labeling Schemes through Universal Matrices (3) Divesh Aggarwal, Chandan Dubey and Shashank K. Mehta. Algorithms on graphs with small dominating targets (4) Tatsuya Akutsu, Daiji Fukagawa and Atsuhiro Takasu. Approximating Tree Edit Distance Through String Edit Distance (5) Kiyoko Aoki-Kinoshita, Minoru Kanehisa, Ming-Yang Kao, Xiang-Yang Li and Weizhao Wang. A 6-Approximation Algorithm for Computing the Least Common \aon-supertree With Application to the Reconstruction of Glycan Trees (6) Federico Mancini, Pinar Heggernes and Charis Papadopoulos. Making arbitrary graphs transitively orientable: Minimal comparability completions (7) Tobias Lenz. Deterministic Splitter Finding in a Stream with Constant Storage and Guarantees (8) Shay Solomon and Yefim Dinitz. Optimal Algorithms for Tower of Hanoi Problems with Relaxed Placement Rules (9) Akira Kamada, Kazuyuki Miura and Takao Nishizeki. Convex Grid Drawings of Plane Graphs with Rectangular Contours (10) Sumit Ganguly and Barna Saha. On Estimating Path Aggregates over Streaming Graphs (11) Andris Ambainis, William Gasarch, Aravind Srinivasan and Andrey Utis. Lower Bounds on the Deterministic and Quantum Communication Complexities of Hamming-Distance Problems (12) Robert Schweller, Manan Sanghi and Ming-Yang Kao. Flexible Word Design and Graph Labeling (13) Jussi Kujala and Tapio Elomaa. Poketree: A Dynamically Competitive Data Structure with Good Worst-Case Performance (14) Dirk Sudholt. Local Search in Memetic Algorithms: the Impact of the Local Search Frequency (15) Xiaodong Wu. Efficient Algorithms for the Optimal-Ratio Region Detection Problems in Discrete Geometry with Applications (16) VIkraman Arvind and Jacobo Toran. The Complexity of Quasigroup Isomorphism and the Minimum Generating Set Problem (17) Venkatesan Guruswami. On 2-Query Codeword Testing (18) Martin Hoefer. Non-cooperative Facility Location and Covering Games (19) Peter Hoyer, Mehdi Mhalla and Simon Perdrix. Resources required for preparing graph states (20) Gennaro Cordasco and Luisa Gargano. How Much Independent Should Individual Contacts be to Form a Small-World? (21) Ferdinando Cicalese, Fredrik Manne and Qin Xin. Faster Centralized Communication in Radio Networks (22) Sang Won Bae, Jae-Hoon Kim and Kyung-Yong Chwa. Optimal Construction of the City Voronoi Diagram (23) Henning Meyerhenke and Thomas Sauerwald. Analyzing Disturbed Diffusion on Networks (24) Telikepalli Kavitha and Chintan Shah. Efficient Algorithms for Weighted Rank-Maximal Matchings and Related Problems (25) Qiaosheng Shi, Binay Bhattacharya, Arie Tamir and Yuzhuang Hu. Optimal Algorithms for the Path/Tree-Shaped Facility Location Problems in Trees (26) Chunmei Liu and Yinglei Song. Exact Algorithms for Finding the Minimum Independent Dominating Set in Graphs (27) Weimin Ma and Ke Wang. On the On-line k-Truck Problem with the Benefit Maximization (28) VIkraman Arvind, Bireswar Das and Partha Mukhopadhyay. On Isomorphism and Canonization of Tournaments and Hypertournaments (29) George Tsaggouris and Christos Zaroliagis. Multiobjective Optimization: Improved FPTAS for Shortest Paths and Non-linear Objectives with Applications (30) Fabrizio Grandoni and Giuseppe Italiano. Improved Approximation for Single-Sink Buy-at-Bulk (31) Patrick Briest and Christian Gunia. Energy-Efficient Broadcast Scheduling for Speed-Controlled Transmission Channels (32) Karol Suchan and Ioan Todinca. Minimal Interval Completion Through Graph Exploration (33) Frank Neumann and Carsten Witt. Runtime Analysis of a Simple Ant Colony Optimization Algorithm (Extended Abstract) (34) Josep Diaz, Fabrizio Grandoni and Alberto Marchetti-Spaccamela. Balanced Cut Approximation in Random Geometric Graphs (35) Hsiao-Fei Liu and Kun-Mao Chao. On Locating Disjoint Segments with Maximum Sum of Densities (36) Yusu Wang. Relations between two common types of rectangular tilings (37) Danny Z. Chen, Rudolf Fleischer, Jian Li, Zhiyi Xie and Hong Zhu. On approximating the maximum simple sharing problem (38) Ralf Klasing, Euripides Markou and Andrzej Pelc. Gathering asynchronous oblivious mobile robots in a ring (39) Serge Gaspers, Fedor Fomin and Saket Saurabh. Branching and Treewidth Based Exact Algorithms (40) Xinwei Shi and Ho-lun Cheng. Quality Tetrahedral Mesh Generation for Macromolecules (41) Takehiro Ito, Erik Demaine, Xiao Zhou and Takao Nishizeki. Approximability of Partitioning Graphs with Supply and Demand (42) Wun-Tat Chan, Francis Chin, Deshi Ye, Yong Zhang and Hong Zhu. Frequency Allocation Problem for Linear Cellular Networks (43) Khaled Elbassioni, Aleksei Fishkin and Rene Sitters. On Approximating the TSP with intersecting Neighborhoods (44) Amr Elmasry, Jyrki Katajainen and Claus Jensen. Two-tier relaxed heaps (45) Tzu-Chin Lin, Hung-I Yu and Biing-Feng Wang. Improved Algorithms for the Minmax-Regret 1-Center Problem (46) Takashi Horiyama, Kazuo Iwama and Jun Kawahara. Finite-State Online Algorithms and Their Automated Competitive Analysis (47) Mikael Onsjoe and Osamu Watanabe. A Simple Message Passing Algorithm for Graph Partition Problems (48) Saswata Shannigrahi and Sudebkumar Prasant Pal. Efficient Prufer-like coding and counting labelled hypertrees (49) Michael Krueger and Harald Hempel. Inverse HAMILTONIAN CYCLE and Inverse 3-D MATCHING are coNP-complete (50) Lukasz Kowalik. Approximation Scheme for Lowest Outdegree Orientation and Graph Density Measures (51) Prosenjit Bose, Michiel Smid and Daming Xu. Diamond Triangulations Contain Spanners of Bounded Degree (52) Guido Proietti and Peter Widmayer. Partitioning the Nodes of a Graph to Minimize the Sum of Subgraph Radii (53) Sylvain Guillemot. Parameterized complexity of some problems on coincidence graphs (54) Tien-Ching Lin and D. T. Lee. Efficient Algorithm for the Sum Selection Problem and K Maximum Sums Problem (55) Tobias Friedrich and Benjamin Doerr. Deterministic Random Walks on the Two-Dimensional Grid (56) Shirou Maruyama, Hiromitsu Miyagawa and Hiroshi Sakamoto. Improving Time and Space Complexity for Compressed Pattern Matching (57) Costas Iliopoulos and M Sohel Rahman. Algorithms for Computing Variants of the Longest Common Subsequence Problem (58) Benjamin Doerr, Johannes Lengler and David Steurer. The Interval Liar Game (59) Katarzyna Paluch. New approximation algorithms for multidimensional rectangle tiling (60) Stefan Ruhrup and Christian Schindelhauer. Online Multi-Path Routing in a Maze (61) Mingen Lin, Yang Yang and Jinhui Xu. Improved Approximation Algorithms for Maximum Resource Bin Packing and Lazy Bin Covering Problems (62) Danny Z. Chen and Chao Wang. Field Splitting Problems in Intensity-Modulated Radiation Therapy (63) Christian Hundt, Maciej Liskiewicz and Ulrich Woelfel. Provably Secure Steganography and the Complexity of Sampling (64) Danny Z. Chen, Xiaobo S. Hu, Shuang Luan, Ewa Misiolek and Chao Wang. Shape Rectangularization Problems in Intensity-Modulated Radiation Therapy (65) Yunhong Zhou. Improved Multi-unit Auction Clearing Algorithms with Interval (Multiple-Choice) Knapsack Problems (66) Robert Elsaesser and Thomas Sauerwald. On the Runtime and Robustness of Randomized Broadcasting (67) Scott Dillard, Gunther Weber, Vijay Natarajan, Valerio Pascucci and Bernd Hamann. Tessellation of Quadratic Elements (68) Kazuo Iwama, Hiroki Morizumi and Jun Tarui. Negation-Limited Complexity of Parity and Inverters (69) Mohamed Aly and John Augustine. Online Packet Admission and Oblivious Routing in Sensor Networks (70) Shantanu Das, Paola Flocchini, Amiya Nayak and Nicola Santoro. Effective Elections for Anonymous Mobile Agents (71) Vinayaka Pandit and Rohit Khandekar. Offline sorting buffers on Line (72) Allan Scott, Ulrike Stege and Norbert Zeh. Politician's Firefighting (73) Joachim Kneis, Daniel Moelle, Stefan Richter and Peter Rossmanith. Intuitive Algorithms and t-Vertex Cover