Analysis and synthesis of concurrent sequential programs

Concurrent sequential program analysis and synthesi

NASA's space processing program

The NASA Space Processing Program was initiated to develop uses of space flight that will support research efforts and manufacturing operations on the ground by processing materials in space. It is expected that the unique conditions that are available in space will provide a basis for a wide variety of economically beneficial services to science and industry in fields such as metallurgy, electronic materials, glass technology, fluid physics and chemistry, and in biological material preparation as well. Plans are described for developing payload equipment to implement materials processing experiments on the missions of the space transportation system (STS). This equipment is intended to support a diversified program of NASA-sponsored materials processing experiments by all classes of scientists, as well as pilot activities by non-NASA sponsors

Current Concepts and Future Directions of CELSS

Bioregenerative life support systems for use in space were studied. Concepts of such systems include the use of higher plants and/or microalgae as sources of food, potable water and oxygen, and as sinks for carbon dioxide and metabolic wastes. Recycling of materials within the system will require processing of food organism and crew wastes using microbiological and/or physical chemical techniques. The dynamics of material flow within the system will require monitoring, control, stabilization and maintenance imposed by computers. Studies included higher plant and algal physiology, environmental responses, and control; flight experiments for testing responses of organisms to weightlessness and increased radiation levels; and development of ground based facilities for the study of recycling within a bioregenerative life support system

Research on magnesium antimonide and magnesium bismuthide as thermocouple materials for thermoelectric power generation

Magnesium antimonide and magnesium bismuthide evaluated as thermocouple material for thermoelectric power generatio

Status and plans of NASA's Materials Science and Manufacturing in Space (MS/MS) program

A description is given of a research and development program on the space shuttle mission designed to prepare the way for possible commercial manufacturing operations on permanently orbiting space stations

Standard Open Right Hepatectomy

The evolution of hepatic resection from an imprecise removal of portions of the liver often associated with a mortality rate of up to 20% to a routine and controlled anatomic procedure with operative risk less than 5%, represents a major advance in modern surgery. This accomplishment has been made thanks to better understanding of the liver vascular and biliary anatomy, recognition of the functional reserve of the liver and the potential for regeneration, advances is surgical technique as well as anesthesia and perioperative care. These factors, along with the improvement of prolonged survival following hepatic resection for colorectal metastases, hepatocellular and cholangiocarcinoma have led to an expansion of liver surgery. In this chapter, we will give the evolution of the technique used for the standard open right hepatectomy. In addition, we will describe on detail our technique employed for right hepatectomy focusing on indications, preoperative preparation and specific technical aspects

A survey of models for parallel computing

Survey of models for parallel computin

The mutual exclusion problem

Mutual exclusion or interlock problem applied to computer operation

Analysis of parallel systems

Analysis of parallel system