Research into the feasibility of thin metal and oxide-film capacitors Final technical report

Feasibility of producing thin metal and oxide- film capacitors with stable electrical properties in high temperature environment

A model to understand population decline of the Devil\u27s Hole pupfish (Cyprinodon diabolis) and support habitat management decisions

After intensive efforts in the 1970s to stabilize the water level in Devil\u27s Hole, the population of the Devil\u27s Hole Pupfish showed slight but steady increase from the 1970s until the mid-1990s when the population began a steady deCline In this study I developed a system dynamics model to help the Devil\u27s Hole Pupfish Recovery Team understand the recent decline and identify and test potential management strategies and policies to reverse or stop the deCline The model and modeling process was used to identify critical gaps in existing data. Tests simulating pore space manipulation, algae removal and addition of refugia fish resulted in long-term population growth but not quick, short-term changes

Research into the feasibility of thin metal and oxide film capacitors Interim scientific report

Feasibility of thin metal and oxide film capacitor

Research into the feasibility of thin metal and oxide film capacitors

Feasibility of thin metal and oxide film capacitor

Risk, Vulnerability, and Hazards: The Industrial Canal and the Lower Ninth Ward

The purpose of this study is to identify, analyze, and describe the social outcomes that may be affected by the environmental risks generated by infrastructure projects; to examine the ways in which vulnerability and exposure to hazards may increase risk in neighborhoods over time; and to examine the implications of addressing the exacerbation of exposure to natural hazards within the traditional environmental justice framework. The Industrial Canal and Lower Ninth Ward were selected as the subjects of this case study because the canal has existed on the perimeter of the neighborhood for nearly one century, isolating Lower Ninth Ward residents from the rest of New Orleans and significantly contributing to two catastrophic flood events. The findings of the study are as follows: (1) the environmental risks associated with infrastructure projects can be magnified when imposed on an already vulnerable neighborhood, and may ultimately result in hazard events which cause displacement and disinvestment. Such consequences can have an impact on micro-level (individual and household) and macro-level (neighborhood) social outcomes; (2) vulnerability and exposure to hazards can initiate a pattern of increased risk that intensifies vulnerability to subsequent hazard events; and, finally, (3) the parallels between the causes and consequences of traditional environmental justice issues and the exacerbation of exposure to natural hazards implies that framing issues relative to natural hazards as matters of justice and articulating the social consequences of not mitigating such hazards can be an excellent way of educating stakeholders and lobbying for resources

Correlations for determining thermodynamic properties of hydrogen-helium gas mixtures at temperatures from 7,000 to 35,000 K

Simple relations for determining the enthalpy and temperature of hydrogen-helium gas mixtures were developed for hydrogen volumetric compositions from 1.0 to 0.7. These relations are expressed as a function of pressure and density and are valid for a range of temperatures from 7,000 to 35,000 K and pressures from 0.10 to 3.14 MPa. The proportionality constant and exponents in the correlation equations were determined for each gas composition by applying a linear least squares curve fit to a large number of thermodynamic calculations obtained from a detailed computer code. Although these simple relations yielded thermodynamic properties suitable for many engineering applications, their accuracy was improved significantly by evaluating the proportionality constants at postshock conditions and correlating these values as a function of the gas composition and the product of freestream velocity and shock angle. The resulting equations for the proportionality constants in terms of velocity and gas composition and the corresponding simple realtions for enthalpy and temperature were incorporated into a flow field computational scheme. Comparison was good between the thermodynamic properties determined from these relations and those obtained by using a detailed computer code to determine the properties. Thus, an appreciable savings in computer time was realized with no significant loss in accuracy

Sub-picosecond compression by velocity bunching in a photo-injector

We present an experimental evidence of a bunch compression scheme that uses a traveling wave accelerating structure as a compressor. The bunch length issued from a laser-driven radio-frequency electron source was compressed by a factor >3 using an S-band traveling wave structure located immediately downstream from the electron source. Experimental data are found to be in good agreement with particle tracking simulations.Comment: 19 pages, 9 figures, submitted to Phys. Rev. Spec. Topics A&

Genetic algorithms with DNN-based trainable crossover as an example of partial specialization of general search

Universal induction relies on some general search procedure that is doomed to be inefficient. One possibility to achieve both generality and efficiency is to specialize this procedure w.r.t. any given narrow task. However, complete specialization that implies direct mapping from the task parameters to solutions (discriminative models) without search is not always possible. In this paper, partial specialization of general search is considered in the form of genetic algorithms (GAs) with a specialized crossover operator. We perform a feasibility study of this idea implementing such an operator in the form of a deep feedforward neural network. GAs with trainable crossover operators are compared with the result of complete specialization, which is also represented as a deep neural network. Experimental results show that specialized GAs can be more efficient than both general GAs and discriminative models.Comment: AGI 2017 procedding, The final publication is available at link.springer.co