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 26 for “"PBX"”.
-
Electron cyclotron emissions fluctuation diagnostic on JET and PBX-M tokamaks
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1994.
-
A design of a PBX to ATM user to network interface over DS1/T1 lines
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.
-
On Detonation Diffraction in Condensed-Phase Explosives
… detonation shock dynamics (DSD) is evaluated for PBX-9502. Comparisons of detonation diffraction in PBX-9502 are made between experiment, multi-material simulations using the calibrated equation of state and reaction rate, and DSD simulations using the computed higher order relation for PBX-9502. …
-
SF-1, BUT NOT DAX-1, PREVENTS P19 CELLS FROM DIFFERENTIATING TO EITHER TROMA-1 OR TUJ1 POSITIVE CELLS UPON RA-TREATMENT
… in Pre-â cell leukemia transcription factors (PBX) mRNA and protein levels in P19 cells prevents them from differentiating to either endodermal or neuronal cells. This suggests that PBX is an important regulator of RA-induced differentiation of P19 cells. A microarray analysis was performed to …
-
Tracking hot spot dynamics in solid state explosives with shock compression microscopy
… into tiny arrays of polymer-bound explosives (PBXs). The ignition and initiation behavior of these materials are studied using a suite of optically-coupled diagnostics which afford high temporal and spatial resolution. A 32-channel pyrometer was used to determine explosive temperature histories …
-
Characterization framework to develop ball-milled thermites as additives to polymer-bound explosives
… the energy density of plastic-bonded explosives (PBXs) by incorporating aluminum (Al) powders has long been of interest. However, Al combustion is kinetically slow, occurring on microsecond to millisecond timescales due to its dependence on external oxidizers. As a result, it contributes little to …
-
Mechanical properties of energetic composites
… damage mechanisms in Polymer Bonded Explosive (PBXs). Specifically, high and low strain-rate compression experiments were performed on several composites, with a view to measuring their elastic properties. A brief review of PBXs, polymers and particulate composites forms chapter 1. A key piece …
-
Numerical Modelling of Detonation and Ignition of Condensed Phase Explosives
… and the comparatively ideal TATB based explosive PBX 9502. Furthermore, this thesis presents a novel methodology to use gauge data from shock initiation experiments to calculate values for the reaction rate. The methodology can be applied to determine rate law parameters without the use of …
-
Thermodynamic and kinetic studies of galena in the presence and absence of potassium ethyl xanthate
… in the first monolayer and via the formation of PbX₂ in subsequent layers. It also appears that galena oxidation and xanthate adsorption are competitive processes that tend to inhibit each other. Ground galena exhibits natural floatability at pH 9.2 as long as oxidation extends to the formation …
-
Detonation modelling of non-ideal high explosives
… formulate a reactive burn model for the IHE PBX 9502. The model is designed to capture the fast and slow reaction stages inherent in PBX 9502 detonation using a two-stage reaction model. Different mixture closure conditions are examined, namely the classical pressure-temperature equilibrium …
-
Electrochemical Measurement of Metal Ions in Water
… pH 7 and pH 9 for the same lead concentration. Pbx(OH)y(x-y)+ forms at pH 7 and 9 and adsorbs to the gold working electrode resulting in higher anodic stripping current. The presence of phosphate in solution increases the lead signal in the same way. The history of the working electrode …
-
Theory of Instability and Nonlinear Evolution of Self -Sustained Detonation Waves
… stability characteristics of detonation in PBX-9502 and nitromethane.
-
Cre-lox-basierte Inaktivierung des Pbx3-Gens
Pbx3 ist ein Homöodomän-Transkriptionsfaktor, der 1991 erstmals aufgrund seiner ausgeprägten Homologie zum Proto-Onkogen Pbx1 isoliert wurde. Zusammen mit einer Untergruppe von Homöodomän-Proteinen bindet es mit für die Entwicklung der Säugetiere unbekannten Konsequenzen in hochmolekularen …
-
PoT: bridging IoT with phone technology
… with Asterisk, a renowned open-source IP-PBX software. The Raspberry Pi acts as a gateway, facilitating communication between IoT devices and VoIP servers. Performance evaluation testing reveals that the Raspberry Pi 4 B can manage up to 182 concurrent calls, while the less performant …
-
Instability of steady and quasi-steady detonations
… model calibrated for the high explosive PBX-9501. We study the behavior of detonations initialized with solutions of DSD as they expand radially. The various models and calibrations exhibit regimes of hydrodynamic stability, in which the detonation evolves slowly in time and agreement …
-
Genetic Pathway Analysis of Abnormal Facial Development In Nonsyndromic Cleft Lip and Palate
… and found to have etiologic roles in NSCLP. The PBX pathway, implicated in murine midfacial development, was confirmed to be associated with NSCLP in our family-based and case-control datasets. The second gene, identified in the CRISPLD2 network, was found to play a novel role in regulating oral …
-
On the calibration of some ideal and non-ideal explosives
The initial portion of this work will expound a concise, albeit limited, introduction to energetic materials, from their background and the reasons they are studied to the modern developments used in the work of this thesis. Today there are several reason why these materials are studied. The …
-
Self-assembling amphiphilic peptides: A novel approach to create new drug systems and three-dimensional scaffolds for tissue regeneration. A resourceful mine not yet fully explored
… This peptide works as an inhibitor of the HOX-PBX1 interaction. HOX and PBX I are two transcription factors that are deeply involved in the DNA regulation during embryogenesis and they are found to be highly miss-regulated in several types of cancers. Until now, peptide amphiphiles have been …
-
Energy localization and heat generation in composite energetic systems under high-frequency mechanical excitation
… a significant amount of heat within samples of PBX 9501 and representative inert mock materials. Surface temperature rises on the order of 10 °C were observed at certain frequencies over a range from 50 kHz to 40 MHz at thermal steady state conditions. The mechanical responses of these samples …
Page 1 of 2