Pulp Polyp Associated with a Natal Tooth: Case Report

Natal teeth are an infrequent occurrence at birth. Often these teeth are extracted because they are very mobile and pose a risk of aspiration. This is a rare case in which a natal tooth was extracted by the pediatrician with his fingers. A root fragment remained and out of this developed a large pulp polyp. This relationship has not been previously reported

The Effect of Water and Sanitation Privatization on Child Mortality Rates in Guayaquil, Ecuador

A strong debate continues in economics over whether privatization of water and sanitation resources is beneficial in developing countries. This paper analyzes mortality and census data in the years 1990- 2010 from the Ecuadorian National Institute of Statistics and Censuses to determine how the privatization of water and sanitation in Guayaquil, Ecuador has affected water-related mortality rates in the city. In this analysis, I conduct a difference-in-difference regression analysis with the under-three, under-five, and under-ten water-related mortality rate as my dependent variable, and the event of water privatization as my independent variable. In this investigation, I find that water privatization in Guayaquil had a negligible effect on water-related mortality

Euroclydon

Pendulum New Music Vision We are&hellip; Encouraging composers and performers to collaborate. Creating a supportive community for CU composers. Bringing new music into contemporary everyday life. Encouraging diversity through music/ innovating the use of technology in art. Raising the standard of excellence in presenting new music. Making Boulder a destination for new music through both live and online concert experiences.</p

Combat Robot

The senior capstone project that was tasked to the team was the decision of choosing a challenge within a national robotics competition. The group decided to compete at the National Robotics Challenge in Marion, Ohio. The idea was to participate in the combat robot competition at this NRC event. Once this decision had been made the next steps were to get an idea of what the rules and requirements of the competition were and to try and to sketch a very rough drawing of what the ideal robot should look like. From there it was decided to start a timeline of the goals and objectives throughout the whole project. This would serve as a baseline, and it was later altered and updated as the project progressed. The next step was then started by making some 3D mockups in SOLIDWORKS to get an idea of what the weight of our main chassis would be. This chassis was printed off utilizing the 3D printer to understand what the durability and weight was going to be of this 3D printed chassis. The main objective for this project was to have the robot fully operational a month before the competition on April 7th. Many different skills were used during this process, including but not limited too soldering, understanding of circuitry, use of SOLIDWORKS, and other general engineering practices

Cybersecurity Certificate Selection Process: A Data Envelopment Analysis Approach

Organizations that face the threat of cyberattacks protect against those threats, in part, by hiring cybersecurity professionals who have both relevant experience and information security/cybersecurity certifications. Cybersecurity certificates vary in many aspects, involve costs, and offer associated potential financial returns. Given the large number of cybersecurity certificates available, the decision of which one(s) to pursue may not necessarily be straightforward. In this paper, we illustrate the use of Data Envelopment Analysis (DEA) for cybersecurity certificate selection. Our analysis identifies six of 18 certifications considered that demonstrate a maximal relative efficiency, and we analyze why the other certifications are relatively inefficient

Incorporating Polaritonic Effects in Semiconductor Nanowire Waveguide Dispersion

We present the calculated and measured energy-propagation constant (E-ß) dispersion of CdS nanowire waveguides at room temperature, where we include dispersive effects via the exciton-polariton model using physical parameters instead of a phenomenological equation. The experimental data match well with our model while the phenomenological equation fails to capture effects originating due to light-matter interaction in nanoscale cavities. Due to the excitonic-polaritonic effects, the group index of the guided light peaks close to the band edge, which can have important implications for optical switching and sensor applications

Investigation of the Rocket Induced Flow Field in a Rectangular Duct

Rocket-Based Combined Cycle (RBCC) concepts attempt to improve the performance of launch vehicles at all points in the launch trajectory and make highly reusable launch vehicles a reality. The Aerojet Strutjet RBCC concept consists of a variable geometry duct with internal, vertical struts that functions in ducted rocket, ramjet, scramjet, and pure rocket modes. These struts have rocket and turbine exhaust nozzles imbedded within them. The rocket flows create an ejector effect with the ingested air at subsonic flight velocities. In ramjet and scramjet modes, the fuel rich nozzle flows react with the ingested air producing an afterburner effect. Under a NASA Marshall Space Flight Center contract, the UAH Propulsion Research Center (PRC) has designed and built a Strutjet simulation facility. A scale model of a single strut has been built and is undergoing cold-flow testing to investigate the mixing of the rocket and turbine exhausts with the ingested air. A complementary experimental program is also underway to examine the induced flow-field generated by rocket nozzles confined in a rectangular duct. Characterizing the induced flow behavior is critical to understanding and optimizing the performance of future Strutjet-based RBCC propulsion systems. The proposed paper will present results from the rocket induced flow investigation

CORROSION-RESISTANT SHIELD FOR CIRCUIT BOARD APPLICATIONS

Networking equipment can be deployed in environments involving polluted airspaces and other non-optimal environments involving humidity, high temperature, high pollution content, etc. Additionally, a significant factor that can be corrosive to electronic devices is the presence of sulfur-dioxide, which can be found in many forms of air pollution. Although it is often recommended to control such environmental conditions/factors, some locations and/or circumstances may limit the ability to control environmental conditions/factors. To improve the operability of electronic devices in caustic/corrosive environments, a corrosion-resistant shield is presented herein that provides a new approach to facilitate corrosion protection for electronic devices instead of conventional conformal coatings. The corrosion-resistant shield can be produced from an affordable material that is replaceable, customizable, and can be targeted to a wide-range of electronic products that may be deployed in moderately corrosive environments