Academic integrity, while important for all students, is especially so for those enrolled in nursing programs. Nurses are entrusted by the public to care for those in need from birth through death. A nursing student who graduates through dishonest means jeopardizes the safety of patients in their care. Nursing faculty need to understand the scope of academic integrity violations and develop meaningful, targeted interventions to show students the harm their actions could cause. The purpose of this dissertation is to explore undergraduate nursing students’ knowledge and perceptions of academic integrity and to specifically look at their willingness to report peer violations. This dissertation study was a collaborative effort among three doctoral students. Using a research team-modified version of McCabe’s Academic Integrity Survey as well as a research team-created Knowledge Assessment, 442 nursing students were surveyed. Results confirm a hesitation to report peers for violations of academic integrity. Students’ ability to neutralize their behaviors as harmless, their desire to remain loyal to their peers, and age act as positive predictive variables for willingness to report peer violations. Additionally, participants’ perceptions of the severity of various offenses and their perceptions of their faculty’s support for academic integrity policies are positively correlated with willingness to report peer violations. Program improvement strategies, such as implementing an honor code, were supported by participants and may help foster a culture of academic integrity that promotes peer reporting. Lastly, a targeted intervention designed for nursing students to promote academic integrity and peer reporting is explored.

This thesis project consists of 19 sculptures. The medium is hot blown glass. The work interprets and extends the visual and metaphorical qualities of bagpipes. The utilization of the German dudelsack references the playful improvisational nature of these international and culturally diverse forms.

Görtler vortices evolve in boundary layers over concave surfaces as a result of the imbalance between centrifugal forces and radial pressure gradients. Depending on various geometrical and free-stream flow conditions, these instabilities may lead to secondary instabilities and early transition to turbulence. In this thesis, a control algorithm based on the boundary region equations is applied to reduce the strength of the Görtler instabilities by controlling the energy of the fully developed vortices, using either local wall deformations or blowing/suction at the wall. A proportional-integral control scheme is utilized to deform the wall or to provide transpiration velocity, where the inputs are either the wall-normal or streamwise velocity components in a plane that is parallel to the wall. The results show that the control based on wall deformation using wall-normal velocity components is more effective in tempering the vortex during its streamwise growth by almost one or two orders of magnitude.

An aerodynamic investigation was performed to assess the effectiveness of combined boundary layer suction and trailing edge blowing at reducing the blade profile losses and the wake momentum deficit of a cascade of tandem IGV's operating at realistic flow conditions. Two trailing edge blowing designs were tested: metal-angle blowing, which oriented the blowing jets very near to the blade exit angle, and deviation-angle blowing, which oriented the blowing jets at a significant deviation angle from the blade exit angle. Both blowing designs used the same boundary layer suction arrangement. A linear cascade of five IGV's was tested with a flap deflection angle of 40 degrees and an inlet Mach number of 0.3. The Reynolds number based on the overall IGV chord length for these experiments was greater than 500,000. The inlet and exit angles of the IGV at this flap setting were 0 degrees and 55 degrees, respectively. Tests performed with no flow control showed significant suction surface flow separation that generated large wakes with high losses and large momentum deficits. The application of boundary layer suction reduced the baseline pressure loss coefficient and wake momentum thickness by 22%. A suction mass flow of 0.4% of the passage flow was used to obtain these results. The addition of metal-angle blowing with the suction resulted in total reductions of 48% and 38% for the pressure loss coefficient and wake momentum thickness. A blowing mass flow of 3.1% of the passage flow was used in addition to 0.4% suction mass flow to obtain these results. The application of the deviation-angle blowing was detrimental to the aerodynamics of the IGV, as both the pressure loss coefficient and wake momentum thickness increased slightly over their suction-only values. This was attributed to a manufacturing defect which distorted the flow of the blowing jet. The results of the deviation-angle blowing experiments were not considered representative of the design intent and reinforced the importance of the hole design for creating a proper blowing jet. While low speed tests of this cascade showed results and trends very similar to those of previous research, the application of flow control proved to be less effective at higher speeds due to the generation of significantly larger wakes. / Master of Science

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Virtual Reality (VR) has strongly emerged to be one of the technologies to play an important role in areas such as entertainment, science, simulation and research. VR use visual, auditory  and other sensations to simulate a user's physical presence in a virtual environment (VE). Adding a new layer of interaction to VR could enhance user’s immersion within the VE. This paper presents an explorative study  offering insights about what factors have to be considered when designing a new blowing input technique within VR. To carry the study two blowing input techniques were prototyped using Arduinos, one attached to the headset and one to the controller of the HTC Vive. Also eight  different VR interactions were developed. Ten users participated in the user study testing the prototypes in ten minutes sessions followed by a questionnaire and an interview. The study results show that the headset prototype was preferred  by the  natural way to interact with. In general the interactions were perceived as more engaging depending on the prototypes used to interact. The conclusion is that when developing VR interactions using these blowing prototypes different factors have to be taken in consideration such as the placement and design of the virtual representation, the triggering distance, the purpose of the interaction and intuitiveness of use. It also concluded that is crucial to not use the blowing inputs in prolonged times which could cause exhaustion and/or dizziness. Finally it revealed that each prototype performed better depending on the interactions used. / Virtual Reality (VR) har starkt framkommit som en av teknikerna för att spela en viktig roll inom områden som underhållning, vetenskap, simulering och forskning. VR använder visuella, auditiva och andra känslor för att simulera en användares fysiska närvaro i en virtuell miljö (VE). Att lägga till ett nytt lager av interaktion med VR kan förbättra användarens försjunkenhet inom VE. I detta dokument presenteras en explorativ studie som ger insikter om vilka faktorer som måste beaktas vid utformningen av en ny blåsinmatningsteknik inom VR. För att bära studien skapades två ingående blås-prototyptekniker med hjälp av Arduinos, en kopplad till headsetet och en till HTC Vive. Även 8 olika VR-interaktioner utvecklades. Tio användare deltog i användarstudien som testade prototyperna på tio minuters sessioner följt av ett frågeformulär och en intervju. Studiens resultat visar att headsetprototypen föredrogs med det naturliga sättet att interagera med. I allmänhet upplevdes interaktionerna som mer engagerande beroende på de prototyper som användes för att interagera. Slutsatsen är att när man utvecklar VR-interaktioner med hjälp av dessa blås-prototyper måste olika faktorer beaktas, såsom placering och utformning av den virtuella representationen, utlösningsavståndet, syftet med interaktionen och användbarheten. Det drog också slutsatsen att det är avgörande att inte använda blås under lång tid, vilket kan orsaka utmattning och/eller yrsel. Slutligen visade det sig att varje prototyp fungerade bättre beroende på vilken av interaktionerna som användes.

This thesis work aimed at increasing the knowledge regarding phenomena occurring when gas is injected using a top-blown lance on to a bath. All results are based on physical modeling studies carried out both using low and high gas flow rates and nozzle diameters ranging from 0.8 mm to 3.0 mm. At the low gas flow rates, the penetration depth in the bath was studied. The experiments focused on studying the effect of nozzle diameter, lance height and gas flow rate on the penetration depth. It was found that the penetration depth increases with decreasing nozzle diameter, decreasing lance height and with increasing gas flow rate. The results were also compared with previous work. More specifically, it was studied how the previous published empirical relationships fitted the current experimental data. It was found that the relationships of Banks [1], Davenport [2], Chatterjee [3] and Qian [4] agreed well with the experimental data of this investigation for nozzle diameters of 2.0 mm and 3.0 mm. However, for smaller nozzle diameters there were considerable deviations. Therefore, a new correlation heuristically derived from energy conservation consideration was suggested and showed better agreement for small nozzle diameters. The experiments carried out at higher gas flow rates focused on the study of swirl motion. The effects of nozzle diameter, lance height, gas flow rate and aspect ratio on the swirl motion were investigated. The amplitude and period of the swirl as well as the starting time and the damping time of the swirl were determined. The amplitude was found to increase with an increased nozzle diameter and gas flow rate, while the period had a constant value of about 0.5 s for all nozzle diameters, gas flow rates and lance heights. The starting time for the swirl motion was found to decrease with an increased gas flow, while the damping time was found to be independent of gas flow rate, nozzle diameter, lance height and ratio of depth to diameter. / QC 20101217

Artefacts relating to tin smelting from tin mills or ¿blowing houses¿ in Devon and Cornwall, plus material from smelting sites that cover a range of dates from the Bronze Age through to the 19th Century, were examined: these include metallic tin, furnace linings, ore samples and slag. Analysis of tin slags from over forty sites was carried out, to determine microstructure and chemical composition. Techniques employed included optical and scanning electron microscopy, X-ray fluorescence and ICP mass spectrometry. Analysis indicates that slag appearance and composition are heavily influenced by local geology. Composition, particularly iron content, is shown to have a strong effect on slag melting point and viscosity, and the implications for the purity of metal produced are discussed. Bringing together the evidence provided by slag chemistry, documentary sources and smelting remains in the archaeological record, changes in tin smelting technology through time, and the consequences thereof, are considered. / R. F. Tylecote Memorial Fund, administered by the Historical Metallurgy Society, and the Francis Raymond Hudson Memorial Fund.

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