introduction: one of the types of hospital management information systems is decision support information system (dsis). this system uses decision-making models and databases for preparing specific information to support their semi-structured or unstructured decisions. the present study aimed to design a decision dsis model for board of trustees of ayatollah kashani hospital, shahrekord, iran. ...

Packed bed units generally, represent the most suitable storage units for air heating solar systems. In these systems the storage unit receives the heat from the collector during the collection period and discharges the heat to the building at the retrieval process. A method for sizing of packedbed storage in an air heating system is represented. The design is based on the K-S curves, which hav...

a new method of optimization on linear parabolic solar collectors using exergy analysis is presented. a comprehensive mathematical modeling of thermal and optical performance is simulated and geometrical and thermodynamic parameters were assumed as optimization variables. by applying a derived expression for exergy efficiency, exergy losses were generated and the optimum design and operating co...

We study an impact of the cosmological environment on the solar gravitational system by the imbedding formalism of Gautreau. It turns out that the cosmic mean-mass density and the cosmological constant give negligibly small contribution to the gravity potentials. On the other hand, the cosmic acceleration beyond the Robertson-Walker geometry can considerably influence the curvature of spacetime...

In this research, a distributed multi-generation system combining photovoltaic-thermal collectors with biomass generating units is established in numerical simulation environment. This aims to fulfilling heating demand of single-storey cottage located Xi'an, Northwest China. The feasibility and stepped utilization different levels energy are validated illustrated. order achieve reachable maximu...

This study aims to model a hybrid power system that can continuously generate by switching between two possible thermal sources: solar radiation and combustion energy from synthesis gases. The comprised receiver, dish, Stirling generator, fluidized-bed gasifier, boiler, water tank. dish was dual-reflection collector used mirrors, namely the main subordinate concentrators, concentrate broad expa...