despite the recent developments in peri-implant surgical regenerative procedures, re-establishing the hard and soft tissue contour is still a challenge in cases with severe ridge deficiency. it becomes more difficult when incorrectly placed implants cause screw connections to come out onto the labial surfaces of the teeth. a two-part maxillary implant supported fixed restoration was constructed...

background: during recent years, there have been many advances in different types of pharmacological and non‑pharmacological tobacco control treatments. in this study, we aimed to identify the most effective smoking cessation methods used in quit based upon a review of the literature. methods: we did a search of pubmed, limited to english publications from 2000 to 2012. two trained reviewers in...

artificial neural networks (anns) are computer techniques that attempt to simulate the functionality and decision-making processes of the human brain. in the past few decades, artificial neural networks (anns) have been extensively used in a wide range of engineering applications. there are only a few applications in liquid membrane process. the objective of this research was to develop artific...

in this research, different alcohols and phenols are subjected to the reaction with hmds in the presence of ionic liquid and silica-supported catalysts. silylation was accomplished under mild reaction conditions at room temperature in short reaction times and good to excellent yields.

an efficient synthesis of polyhydroquinoline derivatives is achieved via hantzsch condensation reaction between aldehydes, dimedone, ethyl acetoacetate and ammonium acetate in the presence of catalytic amount of sfhs in ethanol. this method gives remarkable advantages such as shorter reaction time, simple workup procedure and good to excellent yields. furthermore the catalyst can be recovered c...

This paper addresses the use of video for a flipped classroom with a case study. The instructor makes the lecture videos available to the students prior to class, and utilizes the class time for discussion and student questions. We evaluate this approach with an introductory psychology course that was taught repeatedly in a traditional way and as a lecture video supported flipped classroom. The...

It is suggested that a new area of CSCR (Computer Supported Collaborative Research) is distinguished from CSCW and CSCL and that the demarcation between the three areas could do with greater clarification and prescription.