<p> An oblique four bar structural model with fixed member ends, being the most general building block for space frames, is analysed for establishing its influence coefficients, using the Finite Element Matrix Method. </p> <p> Experimental techniques for measurement of the flexibility influence coefficients of the model are described. </p> <p> Experimental results have been compared against analytical ones. </p> / Thesis / Master of Engineering (MEngr)

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Yes / Polygon, subdivision, and NURBS are three mainstream modeling techniques widely applied in commercial software packages. They require heavy manual operations, and involve a lot of design variables leading to big data, high storage costs and slow network transmissions. In this paper, we integrate the strengths of boundary-based surface creation and partial differential equation (PDE)-based geometric modeling to obtain the first analytical C continuous 4-sided PDE patches involving sculpting force-based shape creation and manipulation and use them to develop an interactive modeling technique for easy and quick creation of 3D models with small data from vertex-frames. With this modeling technique, a vertex frame is defined by eight vertices, and a C continuous 4-sided PDE patch is created from the vertex-frame through an analytical solution to a vector-valued second-order PDE subjected to the boundary conditions determined by the eight vertices of a vertex-frame. A user-friendly interface is developed from the obtained analytical solution, which enables users to interactively input and modify vertex-frame models easily and create 3D models in real time. Different surface modeling tasks are carried out to test the developed interactive tool and compare our proposed method with polygon and NURBS modeling and Coons surfaces. The results demonstrate the effectiveness of our proposed method and its advantages in reducing design variables, saving storage costs, and effective shape creation and manipulation. / European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No 778035; MCIN/ AEI /10.13039/501100011033/ FEDER “Una manera de hacer Europa”

The semi-analytical method, widely used for calculating derivatives of static response with respect to design variables for structures modeled by finite elements, is studied in this research. The research shows that the method can have serious accuracy problems for shape design variables in structures modeled by beam, plate, truss, frame, and solid elements. Local and global indices are developed to test the accuracy of the semi-analytical method. The local indices provide insight into the problem of large errors for the semi-analytical method. Local error magnification indices are developed for beam and plane truss structures, and several examples showing the severity of the problem are presented. The global index provides us with a general method for checking the accuracy of the semi-analytical method for any type of model. It characterizes the difference in errors between a general finite-difference method and the semi-analytical method. Moreover, a method improving the accuracy of the semi-analytical method (when possible) is provided. Examples are presented showing the use of the global index. / Ph. D.

The method of dimensional analysis has been used for almost a century with experimental methods to obtain, among other things, prediction equations in the physical sciences and engineering. Only recently has the method been considered in the statistical sense. A thorough literature research is presented, including history, method and theory, problems, and disadvantages of dimensional analysis. The dimensional analysis preliminary model is transformed into a multiple linear regression model and is compared to a quadratic regression model with respect to prediction of a single variable in some practical examples. Whereas dimensions are the main consideration in the dimensional analysis model, they are ignored in the quadratic regression model. Two sets of experimental data were used, each set on both models, and the respective residual sum of squares and multiple correlation coefficients compared. The results were similar in both cases. The correlation coefficients of the quadratic model were higher than those of the dimensional analysis model and the residual sum of squares were lower for the quadratic than for the dimensional analysis model. / M.S.

The global wearable technology market is forecasted for strong growth over the next five years with revenue expected to reach $14 billion in 2016 and grow to $34.2 billion by 2020 (CCS Insight, 2016). The wearable industry has undergone a long metamorphosis and growth and is presently becoming more mainstream with the popularization of fitness trackers and smartwatches. Because media portrayals influence public perception of topics covered by the media, exploring media portrayals of wearables is an important component part of understanding trends in growth and popularity of wearables. No other study has analyzed how the media has talked about wearable technology. This study examines newspaper coverage of wearable technology from 1988-2016 using the news framing perspective. A systematic content analysis was conducted on 182 articles from the Wall Street Journal, The New York Times, USA Today, New York Daily News, New York Post and The Washington Post analyzing issue frames, interview sources, episodic vs thematic frames, and type of wearable. This study found that among the four issue frames (progress, regulation, conflict, and generic risk) progress was the dominant frame. Episodic news frames emphasizing individual or specific examples were heavily relied on over thematic frames. The frequency of mentioning sources was not related to episodic/thematic coverage except for professor as an interview source. This study also found a significant relationship between interview source and year for no source. The results of this research provides useful insight into how wearable technology has been framed over the past 28 years by the news media which is helpful for companies creating and marketing these technologies, journalists writing about this type of technology, and scholars interested in understanding how the media talks about a new technology while it is in the process of diffusion. / Master of Arts

This study extends notions of framing theory by drawing from research analyzing the framing of Pope Francis within coverage from The New York Times. The mass media has, since the election of Pope Francis in 2013, provided him extensive coverage on a myriad of issues. Previous studies have noted Pope Francis' propensity to draw massive amounts of media attention towards his actions and statements, even noting the potential for Pope Francis to control the media narrative through his own implementation of frames. Drawing on framing theory, this study examines the ways in which coverage of Pope Francis is defined by The New York Times by finding relationships between the issues addressed in Papal coverage, the frames implemented within this coverage, the valence of the messages, and the presentation of Pope Francis himself. This thesis yields that coverage of Pope Francis within The New York Times has shifted from positive valence to primarily neutral valence when comparing the first three years of his papacy to second three years. The findings of this thesis could potentially inform future studies which may wish to determine potential for frame transfer due to the content of articles or for studies which may wish to delve deeper into the issue with a much larger sample. / Master of Arts / Since Pope Francis’ election, the mass media has focused heavily on his statements and actions. Previous literature attests to the notion that Pope Francis is unique among his predecessors when it comes to media coverage, primarily due to his propensity to make statements or moral recommendations that seemingly oppose or deviate from traditional Catholic values. This thesis explores the relationship between Pope Francis and the American mass media by analyzing 226 articles published by The New York Times within the first six years of his Papacy. The findings of this thesis point to notions related to the valence of Papal coverage, which began as primarily positive but have shifted in nature from the beginning of Francis’ Papacy. The findings of this thesis also point towards the religious nature of Papal coverage and also the potential for sexscandal coverage to shift representation of the Pope.

Master of Science