13. The introduction of a second new hypothetical gas. In the foregoing sections, we have investigated some transonic fields of flow by employing a hypothetical gas which closely approximates the real gas during an isentropic flow in the transonic range. Although such a hypothetical gas has a merit that the fundamental equation governing its flow assumes a rather simple form and can be solved e...

Molar excess Volumes, Vijk and speeds of sound , uijk of 2-pyrrolidinone (i) + benzene or toluene (j) + ethanol (k) ternary mixture have been measured as a function of composition at 308.15 K. The observed speeds of sound data have been utilized to determine excess isentropic compressiblities, ( E S κ )ijk of ternary (i + j + k) mixtures. Molar excess volumes, Vijk and excess isentropic compres...

A calorimeter test bench for the efficiency and power loss determination of electronic variable speed drives is presented. The balanced calorimetric setup with air as cooling medium proposed to small AC motors in a range from 1 kW up 7,5 kW. construction, required measurement equipment, procedure especially results uncertainty are important aspects this discussed chapter. device under 2,2 drive...

zeinab fatemi amin phd student (economic sociology and development) majid fouladiyan phd student (theoretical cultural sociology) the main issue in this paper is two-way causal relationship between educational efficiency in any country and the development in society; it means while education in any society is affected by different levels of development, also as a independent variable influences...

The use of Variable Length Codes (VLC) to increase the coding efficiency based on the statistical characteristics of the data has long been employed in digital communication systems. However the catastrophic degradation of VLC encoded data which results from bit errors has led to the development of reversible variable length codes (RVLC) that can be decoded bidirectionally thereby having more e...