BACKGROUND Failure of dental restorations is a major concern in dental practice. Replacement of failed restorations constitutes the majority of operative work. Clinicians should be aware of the longevity of, and likely reasons for the failure of, direct posterior restorations. In a long-term, randomized clinical trial, the authors compared the longevity of amalgam and composite. SUBJECTS, METHO...

Classes of hazard-odds based fixed-order and adaptive smooth goodnessof-fit tests for the composite hypothesis that an unknown discrete distribution belongs to a family of distributions using right-censored observations are presented. The proposed classes of tests generalize Neyman’s 33 smooth class of tests. The class of fixed-order tests is the discrete analog of the hazard-based class of tes...

Recently, based on RSA and discrete logarithm with composite modulus, Huang and Chang proposed two multisignature schemes with distinguished signing authority and claimed that their scheme can resist forgery attack. Unfortunately, in this works, we show that their schemes have forgery attack by security analysis of Huang-Chang multi-signature schemes. Given a multisignature of certain a documen...

Chin-Wei Chang, Kai-Chi Chang, Ya-Shun Chen, Chien-Lin Huang, Chia-Ling Ko, Jia-Horng Lin, Ching-Wen Lou and Wen-Cheng Chen* Department of Fiber and Composite Materials, College of Engineering, Feng Chia University, Taichung 40724, Taiwan School of Chinese Medicine, China Medical University, Taichung 40402, Taiwan Department of Biotechnology, Asia University, Taichung 41354, Taiwan Institute of...

The existing failure criteria to evaluate discontinuous rocks are predominatly based on the relations between principal stresses at failure. None of the criteria has a direct reference to the magnitude of deformation as a major parameter in rock Several reasons are identified indicating that the selection of peak stress as a major parameter, which is obtained through the evaluation of a failure...

the present paper investigates the advantages of a new class of composite grid structures over conventional grids. thus far, a known grid structure such as orthogrid or isogrid has been used as an orthotropic layer with at most in-plane anisotropy. the present laminated grid is composed of various numbers of thin composite grid layers. the stiffness of the structure can be adjusted by choosing ...