Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 409 for “"Ballistic"”.
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Ballistic range development
A ballistic range was developed for use in testing structural materials. High velocity and low velocity guns were investigated. Charge values for various projectile weights were determined and velocity consistency and reproducibility were verified. A range notebook was compiled with necessary user …
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Adaption of performed ballistic motion
… thesis presents a method for adapting performed ballistic motions of a full human figure with many degrees of freedom by using an optimal trajectory formulation and the dynamics derived from first principles. Computation of the joints, torques, and reaction forces allows the application of a …
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The analysis of organic ballistic materials
Both gas chromatography/mass chromatography (GC/MS) and solid phase microextraction (SPME) methodologies have been developed for the extraction and analysis of compounds encountered in relation to unburned propellant powders from firearm ammunitions. These methods allowed the detection of 27 …
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Engineering superconductivity in ballistic semiconductor nanowires
… interfaces must be developed. Second, a lack of ballistic 1D behavior can induce quantum-localized bound states that mimic Majorana signatures. Therefore, both the proximitized nanowire and neighboring readout nanostructures should support ballistic transport. This thesis focuses on the …
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Lagrangian methods for ballistic impact simulations/
… various Lagrangian methods for simulating ballistic impact with the ultimate goal of finding a universal, robust and scalable computational framework to assist in the design of armor systems. An overview is provided of existing Lagrangian strategies including particle methods, meshless …
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BALLISTIC MISSILE DEFENSE IN THE MIDDLE EAST
Ballistic missile proliferation is a significant concern in the Middle East. Israel, Saudi Arabia, and Jordan have closely associated themselves with the United States. These nations are targets of American adversaries such as Iran, Syria, and terrorist groups. Findings of this study revealed the …
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Ballistic resistance of multi-layered steel shields
In this thesis, the ballistic resistance of multi-layered steel shields against projectile impact at the sub-ordnance velocity is evaluated using finite element simulations. Eight types of projectiles of different weight and nose shapes are considered, while the multi-layered shields studied are …
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Ballistic electrons : microscopy, spectroscopy, devices and luminescence
… measure electronic systems which employ ballistic electron emission. First, a Monte-Carlo framework for simulating electron injection from a tunnel junction emitter into a semiconductor collector is presented in detail and a few applications of this theory are described. Second, a method …
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The Nuclear and Ballistic Missile Programs of India
… and overall influence of the nuclear and ballistic missile programs of India. These programs are currently among the most comprehensive in the world aside from the five declared nuclear weapons states; yet, India has chosen to deploy only a small number of ballistic missiles and is not …
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The Ballistic Response of Particle-Filled Elastomeric Systems
… study investigates the complex multiscale ballistic response of particle-filled polymer composites in an effort to link the bulk material behaviour to variations in the microstructure. The multiphase systems under investigation consist of micron-sized ceramic powders integrated within a …
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Tracking and classification of boost phase ballistic missiles
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1995.
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Accelerated computational modeling of ballistic helmet test protocols
… their threat mitigation performance. During ballistic testing, current combat helmet test protocols use clay to record the helmet backface deformation signature, which is used as an important criterion to measure the helmet effectiveness at preventing head injury. However, according to a …
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Ballistic Missile Defense in the Post-Cold War Era
The proliferation of ballistic missiles has considerably increased in the past decade, and it is highly likely that the United States will face a direct threat from new ballistic missile countries by the turn of the century. Unlike the recent National Intelligence Estimate this does not neglect the …
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Probing the Superconducting Gap of Lead With Ballistic Phonons
The assumption that quasiparticles are all in thermal equilibrium with the helium-bath leads to erroneous results for temperature dependences of phonon absorption. Instead, we assume that the phonon-imaging experiment creates small regions of raised temperature that contribute non-equilibrium …
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Ballistic impact resistance of fiber-reinforced high density polyethylene
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1980.
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Satellite constellation design for mid-course ballistic missile intercept
… satellite-based mid-course missile defense. The ballistic missile intercept problem leads to a new paradigm of coverage where interceptor "reachability" replaces line-of-sight coverage. Interceptors in this concept are limited in their time of flight and AV capabilities. Classical design …
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