Includes bibliographical references.

Infinitesimal Hopf algebras ; Modules over weak entwining structures ; On generalized characters ; BiFrobenius algebras ; Integrable models and star structures ; On Nichols algebras of low dimension ; A generalization of crossed products ; A brief introduction to face algebras ; On two proofs for the existence and uniqueness of integrals for finitedimensional Hopf algebras ; Cocycle deformations and Galois objects for some cosemisimple Hopf algebras of finite dimension ; Pointed indecomposable Hopf algebras over Coxeter groups ; A duality theorem for quantum groupoids ; Primitive elements in a free dendriform algebra ; On operator representations of _q(\rm isl(2,\bf R)) ; Duals and doubles of quantum groupoids ( times _R opf algebras) ; Survey of braided Hopf algebras ; Inner and outer actions of pointed Hopf algebras ; Quasitriangular structures on Hopf algebras with positive bases Marcelo Aguiar ; S Caenepeel and E De Groot ; Miriam Cohen ; Yukio Doi and Mitsuhiro Takeuchi ; Ariel Garcia and Roberto Trinchero ; Matias Grana ; Jorge A Guccione and Juan J Guccione ; Takahiro Hayashi ; Louis H Kauffman and David E Radford ; Akira Masuoka ; Alexander Milinski and HansJurgen Schneider ; Dmitri Nikshych ; Maria Ronco ; Sebastian Sachse ; Peter Schauenburg ; Mitsuhiro Takeuchi ; Sara Westreich ; JiangHua Lu Min Yan and Yongchang Zhu