| || Note on Modern Trends in Heavy Vehicle Electrical Electronic systems
Author : Sastry, B.S.
Source : Defence Science Journal ; Vol:32(2) ; 1982 ; pp 105-111
Subject : 623 Military Science and Engineering
Keywords : Electronic Fuel Injection ;Armoured Fighting Vehicles;Aerospace control systems
Abstract : The paper presents an overview of some of the aerospace control systems that are being successfully adopted in the field of Armoured Fighting Vehicles. An automatic electronic transmission controller for an epicyclic gear box with a torque converter to select the forward and reverse speeds in a sequential logic has been developed. Transducers developed for monitoring various engine and transmission parameters are being used for Electronic Fuel Injection (EFI), variable valve timings and electronic governing.
| || Co II Ni II and Cu II Complexes of Oxalic Malonic and Terephthalic Dihydrazides
Author : Sadasivan, N. ;Kumbhar, C.G.
Source : Defence Science Journal ; Vol:32(2) ; 1982 ; pp 113-117
Subject : 54 Chemistry;547 Organic Chemistry
Keywords : Polymeric octahedral structure
Abstract : Complexes of Co(II), Ni(II) and Cu(II) with Oxalic(Oz), malonic(Mz) and terephthalic (TPZ) dihydrazides have been prepared and characterised from elemental analysis, magnetic moment, visible, IR and ESR spectra. Based on this data a polymeric octahedral structure has been assigned for the MCl/sub2/ L.H/sub2/O complexes and a sulphate bridged four coordinate polymeric structure for the CuSo/sub4/L.H/sub2/O complexes. TGA and DTA results are also reported.
| || Performance of Optical Systems Employing Linear Polarisation Masks under Partially Polarised Light Illumination
Author : Gupta, S.D.
Source : Defence Science Journal ; Vol:32(2) ; 1982 ; pp 119-129
Subject : 535 Optics
Keywords : Polarisation masks ;Optical system
Abstract : The modification in the imaging characteristics, achieved by employing linear polarisation masks at different zones of the optical system is considered. This modification technique is comparatively easy to realise into practice. The imaging characteristics of the optical system employing linear polarisation masks illuminated with partially polarised light in terms of point image intensity distributions by making use of coherency matrix approach is studied. The effect of degree of polarisation and polarisation from of the incident light and relative sizes of the three zones, and orientation of the linear polarisation masks has been considered.
| || Note on Structural Studies on Pd II and Uo/sub2/ II Picramates
Author : Srivastava, R.S.
Source : Defence Science Journal ; Vol:32(2) ; 1982 ; pp 131-133
Subject : 54 Chemistry
Keywords : Amide group ;Phenolic oxygen
Abstract : Structure of the picramtes of Pd(II) and Uo/sub2/(II) have been studied with the help of molar conductance, magnetic susceptibility, electronic, infra-red /sup1/-NMR spectra and TG studies. These studies indicate that the Pd(II) picramate is square planar and Uo/sub2/(II) picramate octahedral, involving covalent bonding through the phenolic oxygen and coordination through the nitrogen of amide group.
| || Influence of lead Inorganic Compounds on Combustion Rate of Double Base Rocket Propellants
Author : Singh, Haridwar ;Pillai, V.B.
Source : Defence Science Journal ; Vol:32(2) ; 1982 ; pp 135-142
Subject : 546 Inorganic Chemistry;66 Chemical Technology;662.3 Propellants
Keywords : Burning rate ;Lead chromate
Abstract : The influence of lead nitrate, red lead, lead chromate, lead floride and lead carbonate on the combustion behaviour of double base propellants in the pressure range-35-140kg/cm /sup 2/ was studied. While all these compounds increased burning rates in lower pressure range (35-60 kg/cm/sup 2/) and higher pressure range (120-140 kg/cm/sup 2/), only lead chromate and lead fluoride were effective in the intermediate pressure range of 60-105 kg/cm/sup 2/. None of these compounds were effective as platonizer, except lead fluoride, which lowered n value to 0.34 in the lower pressure range. Addition of carbon black along with lead compounds raised burning rates further and reduced n values significantly in the higher pressure regins. A probable mechanism on the role of lead compounds studied has been suggested based on burning rate and DTA results.
| || Transient Heat Transfer in a Slab with Heat Generation
Author : Chopra, M.G. ;Marwah, I.J.
Source : Defence Science Journal ; Vol:32(2) ; 1982 ; pp 143-149
Subject : 536 Thermodynamics;536.2 Heat Transfer
Keywords : Boundary conditions ;Thermal energy;Numerical solution
Abstract : A numerical solution has been obtained for transient thermal distribution in a slab in which chemical, electrical or nuclear energy is converted into thermal energy. An implicit scheme is used to set up the finite difference analog of the diffusion equation and the accompanying initial and boundary conditions.
| || Analysis of Explosive Mixtures by Thin Layer Chromatography
Author : Shera, B.M.L. ;Vasudeva, S.K. ;Verma, Manmohan;Singh, Balwant
Source : Defence Science Journal ; Vol:32(2) ; 1982 ; pp 151-155
Subject : 54 Chemistry;547 Organic Chemistry
Keywords : Nitramino compounds
Abstract : Thin layer chromatographic separation of some important military explosive mixtures containing nitro and nitramino compounds have been carried out with new developing system.
| || Art in Internal Ballistics
Author : Sharma, K.C. ;Rao, K.S. Bhaskara
Source : Defence Science Journal ; Vol:32(2) ; 1982 ; pp 157-174
Subject : 623.4 Armaments and Ballistics
Keywords : Velocity space curves ;Internal Ballistic Systems
Abstract : A review of the computations in Internal Ballistic Systems for developing pressure and velocity space curves, called primary problem and differential variations due to change in initial phase space of loading conditions, called secondary problem, is presented. In the concluding part, the general aspects of the secondary problem are analysed and reported.
| || Transition Metal Complexes of 6 Methyl 2 Amino Benzothiazole Part 111
Author : Singh, N.K. ;Shukla, Prema;Chaurasia, M.R.
Source : Defence Science Journal ; Vol:32(2) ; 1982 ; pp 75-79
Subject : 620.1 Material Science and Technology
Keywords : Antifungal screening
Abstract : Complexes of the type ML/sub2/X/sub2/ and ML/sub4/X/sub2/ (where M=Cu(II),Ni(II), Co(II), Mn(II), Zin(II), Hg(II) and Cd(II); L=6-methyl-2-aminobenzothiazole;X=-1, -NCS and -OAC have been isolated and characterised on the basis of analytical, magnetic moment, molar conductance, electronic and i.r.spectal data. The antifungal screening of Cu(II) and Hg(II) complexes is also reported.
| || Thermal Stresses Due to the Action of Heat Source
Author : Murthy, D. Rama
Source : Defence Science Journal ; Vol:32(2) ; 1982 ; pp 81-85
Subject : 621 Mechanical Engineering
Keywords : Relaxation time ;Thermoelasticity
Abstract : The propagation of thermal stresses in a half-space, due to the action of a point heat source varying in time in a harmonic manner, using the generalized theory of thermoelasticity which takes into account the effect of relaxation time is discussed.
| || Studies in Sulphonamides Part XIII: Synthesis of Some new 1 methyl 3 ary 1 2 arylazo N substituted P sulphamylbenzeneazo propane 1 3 diones as potential antibacterials
Author : Sharma, H.R. ;Saharia, G.S.;Nigam, S.C.
Source : Defence Science Journal ; Vol:32(2) ; 1982 ; pp 87-94
Subject : 54 Chemistry;547 Organic Chemistry
Keywords : Sulphonamide bases
Abstract : Two 1-methyl-3-arylpropane-1,3-diones viz., 1-methyl-3(2',4'-dimethoxyphenyl)-and l-methlyl-3(3',4'-dimethoxyphenyl) propane-1,3-diones have been synthesised and coupled with diazotised simple and sulphonamide bases in presence of sodium acetate to furnish the corresponding 1-methyl-3(2',4'-3',4'-dimethoxyphenyl)-2 (arylazo/N-substituted p-sulphamylbenzeneazo)propane-1,3-diones. All these compounds were later subjected to in vitro screening against S. aureus, E. coli and p.pyocyanea when these showed considerable activity.
| || New Low Resistance Respiratory Valve
Author : Nayar, H.S. ;Gupta, A.K. ;Bhattacharyya, A.K.
Source : Defence Science Journal ; Vol:32(2) ; 1982 ; pp 95-98
Subject : 61 Medical Sciences
Keywords : Low resistance respiratory valve
Abstract : Fabrication at DIPAS of a low resistance respiratory valve from totally indigenous materials costing Rs.500/- is reported here. Experimental data reveal that the dead space in the valve is 230 ml and the pressure drop across the valve (i.e. the resistance) at a flow rate of 240 litres per minute is 1 cm of water.
| || Unsteady Flow Between Two Oscillating Plates
Author : Ramaniah, G. ;Sekharan, Elelyn Chandra
Source : Defence Science Journal ; Vol:32(2) ; 1982 ; pp 99-104
Subject : 532.542 Fluid Dynamics
Keywords : Analytical expressions ;Oscillating plates;Incompressible viscous fluid
Abstract : The flow of an incompressible viscous fluid between two infinite harmonically oscillating plates is considered, when an oscillatory body force (having the same frequency as that of the plates) is applied in the direction of motion problem, detailed analytical expressions for the velocity field of the fluid, volume flow rate and stress at the plates have been obtained. It is found that the fluid velocity oscillates in time with the same frequency as that of the plates or the body force, but with a phase difference.