4,095 research outputs found

    "Look like the innocent flower, but be the serpent under't": Mimicking behaviour of growth-oriented terrorist organizations

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    This paper examines the interaction between a growth-oriented terrorist organization and an uninformed government based on a two-period signaling game. The terrorists, taking into account the government's counter-terrorism response to first period attacks, gain additional manpower from successful attacks and choose their strategy to maximize the available manpower at the end of period 2. The government tries to infer the terrorist organization's size from the terrorists' attack choice it observes in period 1 and adjusts its second period counter-terrorism spending according to the perceived threat of terrorism. Combining the signaling game and organizational growth approaches of previous contributions, this paper shows that, if a terrorist group follows a growth strategy, it has an incentive to appear weaker than it is by mimicking the behaviour of a smaller organization. Furthermore, depending on its beliefs about the extent of the terrorist threat it can be optimal for a government to spend more on second period counter-terrorism measures if it is not attacked than if it were attacked. The behaviour of contemporary terrorist groups suggests that the assumptions of a growth strategy and mimicking behaviour are justified

    Thermoplastic rubberlike material produced at low cost

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    Thermoplastic rubberlike material is prepared by blending a copolymer of ethylene and vinyl acetate with asphalt and a petroleum distillate. This low cost material is easily molded or extruded and is compatible with a variety of fillers

    Thermoplastic rubber comprising ethylene-vinyl acetate copolymer, asphalt and fluxing oil

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    A thermoplastic rubber is made from a mixture of between about 10 percent and about 50 percent of asphalt, between about 5 percent and about 30 percent fluxing oil, and between about 35 percent and about 70 percent of a copolymer of polyethylene and vinyl acetate

    Cold solid propellant motor has stop-restart capability

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    Solid propellant rocket is kept and fired at low temperatures in launch vehicles or spacecraft. The motor is capable of developing a specific impulse comparable to that of liquid propellant motors, is started, stopped, and restarted, and is stored in space without solar radiation causing hot spots on the motor casing

    Addition of solid oxidizer increases liquid fuel specific impulse

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    Adding soluble solid oxidizers to hydrazine and similar fuels makes them useful in low temperature bipropellant systems. These oxidizers improve the low specific impulse, high freezing point, low boiling point, and low density of the fuels

    WORK-LIFE: AN INTERPLAY OF ISSUES

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    Labor and Human Capital,

    Review of solid propellants for space exploration

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    Solid propellants for space vehicles and spacecraft fuel application
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