Parallel-track program

The parallel-track program is limited to people with acquired immunodeficiency syndrome or Human Immunodeficiency Virus-related illness who have no therapeutic alternatives and cannot participate in conventional clinical trails. The Public Health Service announced it may extend the program to other life-threatening diseases in the future. 

Physicians who provide patients with an investigational drug under a parallel-track program would be expected to function in a manner similar to clinical investigators in the scientific-track. They would provide the drug according to a protocol written by the sponsor, and they would provide the sponsor with data on adverse reac-... 

Critics of the proposed parallel-track program have cited potential liability, delayed market approval, and potentially higher R D costs for drugs in the parallel-track programs. Because of the limited treatment options for the large number of HIV-infected people, participation in the parallel-track program might force sponsors to increase their production, distribution, and administrative capacities earlier than they otherwise would. 

Parallel-track program A FDA program, proposed in 1990, that would allow release of investigational drugs to medical practitioners, on a case-by-case basis, for use in the treatment of AIDS or HIV-related illness for which no satisfactory alternative treatments exist or patient participation in conventional clinical trials is not possible. 

Parallelization for shared-memory systems is a relatively easy task, at least compared to that for distributed-memory systems. The reason lies in the fact that in shared-memory systems the user does not have to keep track of where the data items of a program are stored they all reside in the same shared memory. For such machines often an important part of the work in a program can be parallelized, vectorized, or both in an automatic fashion. Consider, for instance, the simple multiplication of two rows of numbers several thousand elements long. This is an operation that is abundant in the majority of technical/scientific programs. Expressed in the programming language Fortran 90, this operation would look like... 

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