نتایج جستجو برای: artificial disc
تعداد نتایج: 331847 فیلتر نتایج به سال:
To investigate the biomechanical performances of artificial cervical disc (ACD) prostheses, many studies have been conducted, either with sections cadavers under physiological loads or block-like testing fixtures obeying ASTM F2346 standard. Unfortunately, both methods are almost impossible to utilize for accurate results lifetime anti-fatigue experiments at least 10 million cycles due difficul...
The use of databases and interactive tools has enabled filmmakers to discover new ways of authoring. This paper reveals the research and thought that preceded the design of an interactive documentary about a cocktail-lounge band that played hard-core punk songs. The decision to create a system where the presentation database “learns” from each viewer’s choice is as much a way to best accommodat...
Authoring tools in Intelligent Tutoring Systems (ITS) are designed to make it easier for tutors the use of Artificial Intelligence tools. Authoring tools allow tutors to develop adaptive, learner-centered courses that promote interaction between students and virtual tutors. This article presents a review of Virtual Reality (VR) tools for the creation of Virtual Learning Environments (VLE). In p...
there are many approaches for solving variety combinatorial optimization problems (np-compelete) that devided to exact solutions and approximate solutions. exact methods can only be used for very small size instances due to their expontional search space. for real-world problems, we have to employ approximate methods such as evolutionary algorithms (eas) that find a near-optimal solution in a r...
BACKGROUND Many clinical studies have focused on clinical pain scores and less on kinematics following intervertebral disc replacement. Although flexion and extension of the motion segment can be measured on lateral X-rays, measuring lateral bending and axial rotation of the device is extremely difficult on plain radiography. This study was designed to measure, using radiostereometric analysis ...
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