Abstract: A method that provides quality of service in a multiuser orthogonal frequency division multiplex system. The method assures quality of service at application level, which directly affects user's satisfaction with the service for interactive applications, such as web browsing, and real-time applications. The method uses advanced dynamic resource allocation to achieve a common subjective user state and/or dynamic resource allocation to optimize the throughput of the system while increasing the quality of service at application level. The method takes advantages of the information of the instantaneous channel gain and information of the objective technical parameters of the system and applications.

Abstract: The invention relates to tetracycline products produced by genetically engineered cells, and to therapeutic methods using such tetracyclines. The present invention is based on the cloning and heterologous expression of genes encoding the chelocardin biosynthetic pathway.