This project utilizes hydrocyclones in wastewater treatment to select for heavier solids, and has been used before in multiple small-scale systems. This is the first implementation of hydrocyclones in a full-scale plant for the purpose of increased settleability, while also achieving enhanced biological phosphorus removal without the use of an anaerobic selector. Hydrocyclones receive mixed liquor tangentially and separate light solids from more dense solids through their tapered shape, increasing the velocity of liquid as it moves downward and allowing for selection of a certain solids fraction. The hydrocyclones receive flow from the waste stream, selecting for dense solids to recycle through the process while light solids are wasted, creating a balance of granules and flocs with superior settling characteristics in which phosphorus is removed through phosphorus accumulating organisms (PAO). This project was implemented at a wastewater treatment plant rated at 20 MGD utilizing a 4-stage Bardenpho configuration with an IFAS system. This plant routinely experienced moderate settleability issues with an average SVI of 141 and a 90th percentile SVI of 179. Over time data was collected to characterize settleability and activity of PAO, GAO, and filaments. Using an external selector to achieve biological phosphorus is significant in that most wastewater treatment plants cannot do this without the use of an anaerobic selector. This has the potential to apply external selectors to existing infrastructure throughout plants worldwide to achieve not only biological phosphorus removal, but also improved settleability with a very minor capital investment. / Master of Science

No

Background: This thesis is encompassed within the project management science and more specifically within external stakeholder management in public infrastructure projects. Objectives: The objective of this thesis is to analyse project success within two public infrastructure projects in Spain and to gather insight on the impact on project success in public infrastructure projects when managing external stakeholders from a project management perspective in order to contribute to best project management practices knowledge. Methodology: Comparative case studies with a qualitative approach are used for this research, as this is suitable for examining phenomena within its real-life context. The methods of data collection used to gather insight about the research problem include semi-structured interviews, which are based on the perceptions of different stakeholder groups, and objective data based on facts and observations from publicly available documents. Results: Once the objective and subjective data is collected for each case study, this information is analysed and compared for each case as well as between case studies and literature review, this in order to obtain insight and provide answers to the original research questions about successful management of external stakeholders within public infrastructure projects. Conclusions: The main conclusions of this thesis are described in this chapter. The contribution of this thesis to public infrastructure project management is that it gathers insight on the impact on project success in public infrastructure projects when managing external stakeholders from a project management perspective. Finally, the main limitation of this thesis is the sample size in terms of case studies analysed and external stakeholders interviewed, which will require further research to evaluate if the conclusions obtained can vary depending on other external factors such as the type of public infrastructure projects, country and public promoter of the project. Recommendations for future research: Further research should determine whether other countries have similar experiences with regards to management of external stakeholders in public infrastructure projects. In addition, further research is advised regarding Spanish infrastructure projects to confirm the insights of this thesis. Besides, it is considered that further research in the definition of project success is advantageous. Another identified potential research area is the one related with external stakeholders analysis theories, as existing theories in current literature are more focuses on internal stakeholders.

A 2 cm ostectomy was performed on 10 pairs of canine cadaveric humeri proximal to the supratrochlear foramen. Stabilization was with a double plate construct (DB-PLATE) (n=10) or external skeletal fixator with intramedullary pin tie-in configuration (ESF-IMP) (n=10). Cyclic testing was performed. Axial compressive load to failure testing followed. Data analyzed included dynamic stiffness, stiffness and yield load. No constructs failed during cyclic testing or lost stiffness over time, although mean dynamic stiffness was greater for DB-PLATE compared to ESF-IMP. Mean stiffness of DB-PLATE in load-toailure testing was not significantly different than ESF-IMP. Yield force of DB-PLATE was significantly higher than ESF-IMP. These results suggest that both DB-PLATE and ESF-IMP would be appropriate fixation techniques for stabilization of comminuted supracondylar humeral fractures in dogs with appropriate exercise restriction. Double plate fixation may be preferable when prolonged healing or inadequate post-operative restraint was anticipated because it was stronger in destructive testing.

No description available.

This thesis describes the use of short external cavity (SXC) semiconductor diode lasers as single longitudinal mode (SM) tunable sources. A SXC forces a multimode diode laser to lase on a single longitudinal mode. Various laser types were investigated in SXC configurations using both planar and spherical external mirrors. The side mode suppression ratio (SMSR) and the SM tuning range were measured with respect to the positioning of the external cavity element. With a planar mirror as the SXC element, SMSR of —33 dB and SM tuning ranges of 1 nm (110% of a mode spacing) were obtained with inverted rib waveguide (IRW) lasers. For external cavity lengths of ~ 60 um the total continuous SM tuning range summed over all modes was found to be 72 cm^-1 or 12 nm. The use of a spherical mirror improved the results. A SXC laser consisting of a spherical mirror and an IRW laser had SMSR values of —37 dB and SM tuning ranges of 1.10 nm. Power and voltage characteristics of SM SXC lasers were also examined. It was found possible to use the laser voltage and electronic feedback to control the external cavity length for optimum SM output. The external differential quantum efficiency (DQE) was found to be wavelength dependent and may be explained by the wavelength dependence of the scattering/absorption loss. One aspect of the characteristic trend of the DQE with respect to wavelength is that it offers the possibility of determining the lasing wavelength of the SM without the use of a monochromator. / Thesis / Master of Engineering (ME)

Gait is the method of human locomotion using limbs. Recently, the analysis of human motion, specifically human gait, has received a large amount of research attention. Human gait can contain a wide variety of information that can be used in biometrics, disease diagnosis, injury rehabilitation, and load determination. In this dissertation, the development of a model-based gait analysis technique to classify external loads is presented. Specifically, the effects of external loads on gait are quantified and these effects are then used to classify whether an individual gait pattern is the result of carrying an external load or not. First of all, the reliability of using continuous relative phase as a metric to determine loading condition is quantified by intra-class correlation coefficients (ICC) and the number of required trials is computed. The ICC(2, 1) values showed moderate reliability and 3 trials are sufficient to determine lower body kinematics under two external load conditions. Then, the work was conducted to provide the baseline separability of load carriage conditions into loaded and unloaded categories using several lower body kinematic parameters. Satisfactory classification of subjects into the correct loading condition was achieved by resorting to linear discriminant analysis (LDA). The baseline performance from 4 subjects who were not included in training data sets shows that the use of LDA provides an 88.9% correct classification over two loaded and unloaded walking conditions. Extra weights, however, can be in the form of an external load carried by an individual or excessive body weight carried by an overweight individual. The study now attempts to define the differences in lower body gait patterns caused by either external load carriage, excessive body weight, or a combination of both. It was found significant gait differences due to external load carriage and excessive body weight. Principal Component Analysis (PCA) was also used to analyze the lower body gait patterns for four loading conditions: normal weight unloaded, normal weight loaded, overweight unloaded and overweight loaded. PCA has been shown to be a powerful tool for analyzing complex gait data. In this analysis, it is shown that in order to quantify the effects of external loads for both normal weight and overweight subjects, only two principal components (PCs) are needed. The results in this dissertation suggest that there are gait pattern changes due to external loads, and LDA could be applied successfully to classify the gait patterns with an unknown load condition. Both load carriage and excessive body weight affect lower body kinematics, but it is proved that they are not the same loading conditions. Methods in the current work also give a potential for new medical and clinical ways of investigating gait effects in osteoarthritis patients and/or obese people. / Ph. D.

In this paper, I will argue against the position of Carol Hay, who asserts that the oppressed have an obligation against oppression and that the bare minimum of this obligation is to resist internally. I will demonstrate that resisting internally leaves space for the oppressed to affirm the oppressors' false beliefs. Affirming the oppressor's false belief causes the oppressed person to disrespect themself. In order to understand why we must first understand what things contribute to our self-respect. Our ability to respect ourselves depends on many factors, but I will focus on two specifically. The first is our internal/self-image; this is how we see ourselves. The second is our external image; this is how we think people see us. One way we can disrespect ourselves is by causing conflict between these two elements, which undermines our self-respect. Hay's account is grounded on the oppressed person respecting themself. Therefore, if an oppressed person can disrespect themself while meeting the bare requirements of the duty to resist oppression, then we need to reconsider the bare minimum of the obligation to resist oppression. / Master of Arts / In this paper, I will argue against the position of Carol Hay, who asserts that the oppressed have an obligation against oppression and that the bare minimum of this obligation is to resist internally. I will demonstrate that resisting internally leaves space for the oppressed to affirm the oppressors' false beliefs. Affirming the oppressor's false belief causes the oppressed person to disrespect themself. In order to understand why we must first understand what things contribute to our self-respect. Our ability to respect ourselves depends on many factors, but I will focus on two specifically. The first is our internal/self-image; this is how we see ourselves. The second is our external image; this is how we think people see us. One way we can disrespect ourselves is by causing conflict between these two elements, which undermines our self-respect. Hay's account is grounded on the oppressed person respecting themself. Therefore, if an oppressed person can disrespect themself while meeting the bare requirements of the duty to resist oppression, then we need to reconsider the bare minimum of the obligation to resist oppression.

No / Guest Editorial.

Pedestrian fatalities are on the rise in the United States, and this trend shows no signs of reversing. One contributing factor to these incidents is pedestrians' difficulty in accurately assessing traffic conditions and vehicle actions, leading to potentially fatal collisions. One promising solution could be the use of additional visual cues through external vehicle lighting on the front of vehicles to aid pedestrians in making safer decisions. This research explored this possibility through two studies that examined an LED display mounted on the grill of a study vehicle. The display changed color to communicate whether the vehicle was accelerating or decelerating (the display turned white if the vehicle was accelerating, and amber if the vehicle was decelerating). The first study assessed how well participants could judge whether the vehicle was accelerating or decelerating when the display was active versus inactive, and whether a verbal explanation of the display's function improved their understanding. The second study not only revisited judgement accuracy, but also examined its influence on participants' crossing intentions. Additionally, this study evaluated if repeated exposure to the display in a different traffic scenario (maneuvering a left turn at a stop sign controlled intersection) enhanced understanding as well as verbal explanations, which are less feasible in real world traffic situations. Findings from these studies indicated that a clear verbal explanation of the display significantly enhanced participants' ability to discern vehicle acceleration and deceleration, but exposure to the display in other traffic scenarios provided the same benefit. Study 2 did not observe significant changes in the safety buffer (i.e. the amount of time between when participants decide to cross, and when there would be a conflict with the vehicle if they did cross), but the average number of safe crossing decisions versus unsafe was improved, though these results were inconsistent across participants. These findings suggest potential for enhancing pedestrian safety by providing pedestrians with additional information through external vehicle lighting displays. Future research should focus on optimal implementations strategies for such displays and investigate any possible unintended consequences of deploying this technology on public roads. / Master of Science / More pedestrians are dying on roadways in the United States every year, and it does not look like it's going to get better soon. One reason for these incidents is that people often have trouble figuring out what cars around them are doing, which can lead to deadly crashes. One way to help people understand what cars are doing is to add a lighting display to the fronts of cars. These lights could give pedestrians more information to make safer choices. This idea was tested in two studies that looked at adding lights to the front of a car. These lights turned white when the car was speeding up, and amber when the car was slowing down. The first study checked if people could correctly figure out if a car was speeding up or slowing down when the lights were on or off, and if telling them what the colors of the lights meant helped them understand better. The second study looked at how well people could tell whether the car was speeding up or slowing down as well, but also looked at how the lights changed the timing of when they decided to cross the street. It also looked at whether seeing the lights in a different situation, like turning left at a stop sign, helped people understand what the vehicle was doing as good as when someone explained it to them, which is not always possible in real life. The study showed that telling people what the colors of the lights mean did help people figure out if a car was speeding up or slowing down, and just seeing the lights in different road situations helped as well. The second study did not find any changes in how much time people left when deciding it was safe to cross, but it did show that some people made safer choices more often, even though this was not the same for everyone. These results show that adding these types of lights to cars might make roads safer for pedestrians. Future studies should look into the best way to use these types of lights and think about any problems that might occur if these lights are used on public roads.