NOPR Collection:

18-Bit binary inductive voltage divider for self balancing a.c. bridge applications

Sat, 01 Oct 1994 00:00:00 GMT

Title: 18-Bit binary inductive voltage divider for self balancing a.c. bridge applications Authors: Murthy, C Nagaraja; Nataraj, V; Ramgopal, S; Lele, M V Abstract: The constructional details of an 18-bit binary inductive voltage divider (IYD) for a.c. bridge applications is described. Simplified construction with less number of windings, interconnection of winding through SPDT solid state relays instead of DPDT relays, improves reliability of IVD. High accuracy for most precision measurement achieved without D/A converters. The checks for self consistency in voltage division shows that the error is less than 2 counts in 2¹⁸. Page(s): 297-298

An approximate periodic solution ford d² y/dt² +y = aϵ + y²

Sat, 01 Oct 1994 00:00:00 GMT

Title: An approximate periodic solution ford d² y/dt² +y = aϵ + y² Authors: Rao, B Nageswara; Rao, A Venkateshwar Abstract: The branch of mechanics that has been subjected to most intensive attack from the nonlinear view point is the theory of vibration of mechanical and electrical systems. Other branches of mechanics such as income pressible and compressible fluid flow, elasticity plasticity wave propagation, etc., also have been studied as nonlinear problems, but the greatest progress has been made in treating vibration of nonlinear systems. Page(s): 295-296

Sulphur containing lubricant additives

Sat, 01 Oct 1994 00:00:00 GMT

Title: Sulphur containing lubricant additives Authors: Kumar, Saroj; Roy, Narendra N Abstract: A number of bis-(aryl) thiuram disulphide and bis-(aryl) xanthogens have been synthesized and tested as extreme pressure additives using a Seta-Shell four ball lubricant testing machine. Bis-(o-tolyl) thiuram disulphide and bis-(p-sulphonyl) thiuram disulphide are found to be efficient extreme pressure additives showing a higher welding load and a lower scar diameter. Coefficient of friction has been calculated and its variation with load in the case of different additives has been explained. A mechanism for the action of bis-(o-tolyl) thiuram disulphide and bis-(p-sulphonyl) thiuram disulphide with higher weld loads has also been proposed. Page(s): 292-294

Role of oxygen balance on the thermal decomposition behaviour of composite propellants

Sat, 01 Oct 1994 00:00:00 GMT

Title: Role of oxygen balance on the thermal decomposition behaviour of composite propellants Authors: Venugopalan, S; Sarwade, D B; Agrawal, J P Abstract: Differential thermal analysis (DTA) on amonium perchlorate (AP), hydroxy terminated polybutadiene (HTPB) based polyurethane (PO) and other composite propellant compositions consisting of AP and PO matrix has been studied. The data show that as the oxygen balance (OB) of the propellant composition decreases the decomposition rate of AP during the second stage (deflagration exotherm-Exo II) around 360ᵒ C rises very significantly due to the increase in calorific values. Page(s): 289-291

NOPR Collection:

18-Bit binary inductive voltage divider for self balancing a.c. bridge applications

An approximate periodic solution ford d2 y/dt2 +y = aϵ + y2

Sulphur containing lubricant additives

Role of oxygen balance on the thermal decomposition behaviour of composite propellants

An approximate periodic solution ford d² y/dt² +y = aϵ + y²