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NPS Defense Energy Semina
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We analyse the results obtained and expose the model used in the design of the process of splitting of naftas from a Fluid Catalytic Cracking (FCC) unit using the stochastic mathematical programming.
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Naval Research Program PosterNPS-18-M294-AApproved for public release; distribution is unlimited
NPS Defense Energy SeminarMultidimensional issues require flexible and often equally involved methods to address them. Operational energy problems are among the most complex in combat and peacetime conditions. As technology drives the... more
NPS Defense Energy SeminarMultidimensional issues require flexible and often equally involved methods to address them. Operational energy problems are among the most complex in combat and peacetime conditions. As technology drives the United States military to increase energy consumption, it becomes critical to examine the gaps that appear in this resource-hungry environment. Specifically, the Marine Corps recognizes that the inability to properly plan and use operational energy will truncate its operational reach. The next iteration of the Marine Corps expeditionary strategy demands that combat units operate for longer periods and in larger battlespaces with the same amount of fuel and resources than they did in past decades. The need to extend its operational reach has compelled the Marine Corps to establish the Expeditionary Energy Office. In this pursuit, the Energy Office has initiated a variety of research efforts with numerous agencies, in particular, with the United St...
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NPS NRP Executive SummaryReport Type: Interim ReportProject Summary: Timely preparation for hurricanes is essential to both mission and personnel safety and health for the Marine Forces Reserve (MFR). This project developed, deployed and... more
NPS NRP Executive SummaryReport Type: Interim ReportProject Summary: Timely preparation for hurricanes is essential to both mission and personnel safety and health for the Marine Forces Reserve (MFR). This project developed, deployed and evaluated the Hurricane Decision Simulator (HDS), an online training tool that enables the Commander and key personnel at MFR Headquarters and other key staff to rapidly gain experience in hurricane preparation decision making in a realistic context, with hundreds of simulated storms. The HDS decision context was modeled, and the HDS (version 0) was originally built for the MFR Headquarters in New Orleans in 2015. An online deployment was built in 2016 (v. 1.0). In 2017, the Hialeah Reserve Training Center was added as was the capability to introduce new decision contexts, and the synthetic storm generation model was updated (v. 2.0). Preliminary human-subjects experiments on the impact of the HDS were conducted in 2017, and a second round is planne...
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Abstract. We explore various relations for the detonation energy and velocity as they relate to the inverse radius of the cylinder. The detonation rate-inverse slope relation seen in reactive flow models can be used to derive the familiar... more
Abstract. We explore various relations for the detonation energy and velocity as they relate to the inverse radius of the cylinder. The detonation rate-inverse slope relation seen in reactive flow models can be used to derive the familiar Eyring equation. Generalized inverse radii can be shown to fit large quantities of cylinder results. A rough relation between detonation energy and detonation velocity is found from collected JWL values. Cylinder test data for ammonium nitrate mixes down to 6.35 mm radii are presented, and a size energy effect is shown to exist in the Cylinder test data. The relation that detonation energy is roughly proportional to the square of the detonation velocity is shown by data and calculation.
Traditional methods lack the necessary or appropriate means for expressing the integrity constraints during the database conceptual modeling stage. At most, integrity constraints are informally documented and then, coded in the... more
Traditional methods lack the necessary or appropriate means for expressing the integrity constraints during the database conceptual modeling stage. At most, integrity constraints are informally documented and then, coded in the application. This leads to late error detection and database inconsistencies due to the incapacity of the domain expert to validate the program code. Thus, it is necessary to express such constraints in a natural and formal way in order to close the gap between modelers and domain experts, and to support the transformation to other languages and models. As a result, we propose a controlled natural language based on Semantics of Business Vocabulary and Business Rules (SBVR) to help modelers and domain experts in the process of writing and validating the constraints that cannot be represented in an Entity-Relationship schema; and the Alloy language to allow a formal specification. Inaddition, all the correspondences between the models and languages are described in order to consistently express the constraints and to lay the foundations of the automatic transformation. Finally, a case study and a usability survey show that the proposal is feasible, without abandoning a traditional and popular approach such as the Entity-Relationship model.
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The aim of the present work was to develop an in situ preparation of chitosan/apatite nanocomposites and evaluate their bioactivity, physiological stability and enzymatic biodegradation. Composites of different chitosan/hydroxyapatite... more
The aim of the present work was to develop an in situ preparation of chitosan/apatite nanocomposites and evaluate their bioactivity, physiological stability and enzymatic biodegradation. Composites of different chitosan/hydroxyapatite ratios were prepared by wet chemistry using different kinds of chitosan. The method of preparation used to obtain composites in this work could be more attractive with respect to previous procedures because it allows more homogeneous systems and to control the composition and structure of the resulting materials. The bioactivity of the studied material was evidenced by the deposition in its surface of a calcium phosphate layer with apatite morphology after immersion in simulated body fluid (SBF). A higher biodegradation of composites with respect to apatite was obtained due to the presence of chitosan. Also the biodegradability of the composites increased with the chitosan content. Both, biodegradation and bioactivity could be controlled by the molecular weight of chitosan polymer matrix Along the different kinds of chitosan used, a better in vitro biological result was obtained using a chitosan with lower molecular weight. The in vitro biological characteristics of composites indicate that they are promising materials for bone substitution in guided bone regeneration.
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Abstract For certain avionics systems, built-in test (BIT) alone cannot accurately fault isolate to a single avionics box, or Weapons Replaceable Assembly (WRA). This is evident in the number of WRAs that are incorrectly removed and... more
Abstract For certain avionics systems, built-in test (BIT) alone cannot accurately fault isolate to a single avionics box, or Weapons Replaceable Assembly (WRA). This is evident in the number of WRAs that are incorrectly removed and replaced at the aircraft. Such false remove and ...
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Research Interests: Physics, Mechanics, High Pressure, Detonation, Ammonium Nitrate, and 4 moreRadius, Cylinder, Shock Wave, and Inverse
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Various measurements under ambient conditions are presented for LX‐17. The size (diameter) effect has been measured with copper and Lucite confinement, where the failure radii are 4.0 and 6.5 mm, respectively. The air well corner‐turning... more
Various measurements under ambient conditions are presented for LX‐17. The size (diameter) effect has been measured with copper and Lucite confinement, where the failure radii are 4.0 and 6.5 mm, respectively. The air well corner‐turning has been measured with an LX‐07 booster, and the dead‐zone results are comparable to the previous TATB‐boosted work. Four double cylinders have been fired, and dead zones appear in all cases. The steel‐backed samples are faster than the Lucite‐backed samples by 0.6 μs. Bare LX‐07 and LX‐17 charges of 12.7 mm radius were fired with air gaps. Long acceptor regions were used to truly determine if detonation occurred or not. The LX‐07 booster crossed a 10 mm gap with a slight time delay. Steady‐state LX‐17 crossed a 3.5 mm gap but failed to cross a 4.0 mm gap. LX‐17 charge with a 12.7 mm radius run after the booster crossed a 1.5 mm gap but failed to cross a 2.5 mm gap. Timing delays were measured where the detonation crossed the gaps. The Tarantula mod...
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Pin and X-ray corner turning data have been taken on ambient LX-17 and PBX 9052, and the results are listed in tables as an aid to future modeling. The results have been modeled at 4 zones/mm with a reactive flow approach that varies the... more
Pin and X-ray corner turning data have been taken on ambient LX-17 and PBX 9052, and the results are listed in tables as an aid to future modeling. The results have been modeled at 4 zones/mm with a reactive flow approach that varies the burn rate as a function of ...
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Research Interests: Mathematics, Computer Science, Biomedical Engineering, Kinetics, Nonlinear dynamics, and 15 morePositron Emission Tomography, Medicine, Estimation Theory, Wavelet Analysis, Computation, Computer Simulation, Animals, Male, Mathematical Model, Local minima, Theoretical Models, Rats, Initial Condition, Kinetic Parameter, and Compartment Model
The physostigmine-loaded poly(ortho ester) (POE), poly(dl-lactide-co-glycolide) (PLGA) and POE/PLGA blend microspheres were fabricated by a spray drying technique. The in vitro degradation of, and physostigmine release from, the... more
The physostigmine-loaded poly(ortho ester) (POE), poly(dl-lactide-co-glycolide) (PLGA) and POE/PLGA blend microspheres were fabricated by a spray drying technique. The in vitro degradation of, and physostigmine release from, the microspheres were investigated. SEM analysis showed that the POE and POE/PLGA blend particles were spherical. They were better dispersed when compared to the pure PLGA microspheres. Two glass transition temperature (Tg) values
Research Interests: Materials Science, Biomaterials, Kinetics, Drug Delivery System, Polymers, and 15 moreMedicine, Multidisciplinary, Diffusion, Glass Transition Temperature, Particle Size, Phase Separation, Microsphere, PLGA, Microspheres, Materials Testing, Spray Drying, Drug Carriers, Lactic Acid, Drug Stability, and Body Fluids
We present a new method for constructing nearly orthogonal Latin hypercubes that greatly expands their availability to experimenters. Latin hypercube designs have proven useful for exploring complex, high-dimensional computational models,... more
We present a new method for constructing nearly orthogonal Latin hypercubes that greatly expands their availability to experimenters. Latin hypercube designs have proven useful for exploring complex, high-dimensional computational models, but can be plagued with unacceptable correlations among input variables. To improve upon their effectiveness, many researchers have developed algorithms that generate orthogonal and nearly orthogonal Latin hypercubes. Unfortunately, these methodologies can have strict limitations on the feasible number of experimental runs and variables. To overcome these restrictions, we develop a mixed integer programming algorithm that generates Latin hypercubes with little or no correlation among their columns for most any determinate run-variable combination—including fully saturated designs. Moreover, many designs can be constructed for a specified number of runs and factors—thereby providing experimenters with a choice of several designs. In addition, our al...