Modern timber frame buildings are a unique combination of ancient carpentry techniques coupled with one of the newest enclosure systems found on construction sites around the world. Contemporary timber frame structures typically utilize structural-insulated panels (SIPs) attached to a timber frame skeleton to create functional, enclosed structures, such as houses, churches and a myriad of retail and industrial buildings. The skeleton contains large wooden members connected using wooden joints held together with wooden pegs or wedges. SIPs consist of a layer of rigid expanded polystyrene insulation covered on one side by oriented strand board and on the other side by oriented strand board, drywall, or some other interior finish. In timber frame buildings, SIPs also serve as diaphragm elements, which are flat structural assemblies loaded by shear forces in the plane of the panel. Current design methodologies for timber frame structures do not formally incorporate the structural benefits of SIPs as diaphragm elements, which contribute significantly to the ability of these buildings to resist lateral loads. The contribution of this research was to quantify necessary design parameters to enable timber frame designers to capitalize on the significant in-plane strength and stiffness of SIPs when designing timber frame structures to resist lateral loads. Strength and stiffness tests were conducted on three 8 ft (2.44 m) deep and 24 ft (7.32 m) long roof diaphragm assemblies, and two 20 ft (6.10 m) deep and 24 ft (7.32 m) long roof diaphragm assemblies. Data from these tests were collected, tabulated and analyzed according to existing methods typically utilized for post-frame diaphragm testing. Strength and stiffness of timber frame and SIP roof diaphragm assemblies were determined from monotonic test results and a value for Response Modification Coefficient, R, for use with seismic design procedures, was estimated utilizing cyclic test data. Procedures for calculating strength and stiffness of a roof diaphragm based on the strength and stiffness of test panels were presented and incorporated within post-frame diaphragm design methods. Diaphragm-frame interaction analyses were performed utilizing test data from roof diaphragm assemblies that demonstrated the code conformance of members within timber frames subjected to lateral loads. Using roof diaphragm test data and procedures developed for adjustments from the test panel to building roof length, example designs were conducted which confirmed the effectiveness of including SIPs as diaphragm elements for code conforming designs for wind and seismic load resistance of timber frame and SIP buildings. / Ph. D.

Thermal efficiency of Precast Concrete Sandwich Panel Walls has become a major topic when discussing the building envelope in academia. At Utah State University, research is being done to evaluate the structural and thermal efficiency of fiber reinforced polymer connectors being used today. In evaluating several different proprietary fiber reinforced polymer systems, researchers plan to develop design procedures to help engineers accurately determine minimum design requirements when using fiber reinforced polymer connectors. This largely requires a determination of the degree of composite action incurred by each system. Testing is performed by constructing small scale specimens (3 ft. by 4 ft., 0.91 m by 1.22 m). Each specimen contains one of the fiber reinforced polymer connecting systems. By constructing a five-wythe, two wall specimen, direct shear can be applied to the connectors using a push-off shear test method. By performing this test it can be determined to what degree the panel is acting compositely. Once the degree of composite action is determined, correlation can be made between design and degree of composite action. Economizing and simplifying this procedure is key to further implementation of precast concrete sandwich panel walls in all areas of our building infrastructure.

Precast concrete sandwich panels are a structural system consisting of concrete layers with insulation layers in between. The concrete layers are connected through the insulation with specially designed connectors. For engineers to properly design and analyze the strength characteristics of sandwich panels and their connectors, the engineers need to obtain recommendations from the individual connector manufacturers, which can be a very rigorous process. This project tested eight full scale precast concrete sandwich panels with two concrete layers on either side of an insulation layer with connectors concentrated at either end of each panel. The objectives of this project were to evaluate the interaction between the two concrete layers and how well the connectors transferred forces between the layers (percent of composite action) and to validate simplified methods of predicting properties of the panels by comparing the predicted panel properties to the results of the testing series. Additionally, this study evaluated the panel’s different thicknesses and lengths and compared their results.

This bachelor thesis investigates the implementation of a solar panel and battery storage system in a Swedish church that is intermittently heated focusing on its economic effect and its environmental impact in terms of CO2 emissions. The models are developed to evaluate the costs and CO2 emissions associated with power production, storage, usage and installation of the implemented system. The thesis examines two cases: Case 1, where all the energy is bought from the grid, representing the current energy usage in many churches, and Case 2 which assumes the integration of a solar panel and battery storage system. In terms of economic effects, the thesis reveals that the solar panel and battery storage system results in a negative impact on the church’s costs regarding energy usage. Over a period of 25 years, the church is projected to incur a loss of 956 400 SEK. However, it is worth noting that the direct energy costs when having an implemented solar panel and battery storage system are reduced by 33%, and the sale of surplus solar power generates an income of 1 816 100 SEK. Regarding the environmental impact, the implementation of the solar panel and battery storage system results in increased emissions compared to when only consuming the Swedish electricity mix. This is mainly due to the emissions regarding manufacturing of the solar panel and battery storage system. However, it is visible that the implementation of solely solar panels would lower the system’s total CO2 emissions. The sensitivity analysis demonstrates that replacing the Swedish electricity mix with the EU electricity mix for sold solar energy results in a positive environmental impact. This since the power generated from the solar panels replaces the European electricity mix which has a higher CO2- emission equivalent. This is important to consider since it is impossible to determine which electricity mix the sold PV energy will replace. In conclusion, while the implementation of a solar panel and battery storage system negatively affects the church’s energy costs and leads to increased CO2 emissions in the examined case, there are certain benefits to consider. The reduced energy bought from the grid and lowered direct energy costs, as well as the revenue from selling surplus solar power establishes the potential for the system to provide a positive impact. However, there is a need for advancements in battery technology for this to be a possibility.

Health care guidelines provide a means of assessing the best available research evidence on a given health care topic and offering recommendations about use of specific interventions and management of patient care. Guidelines allow clinicians, patients, health administrators and policy-makers to be efficiently informed and stay up to date on alternative care options. The development of guidelines is a complex and multidisciplinary process, with a defining feature of involving a panel of experts in steps such as selecting health care questions, assessing the research evidence, making judgements about health benefits and harms, and, ultimately, formulating recommendations. Guideline methodology has advanced over the past decades, including establishment of specific steps and standards to ensure trustworthiness of guidelines. However, there remain critical research questions on how to best accomplish and reach these standards, including how to best engage panels in the steps. This thesis presents a body of research on the development and evaluation of new methods for decision-making and considering health outcomes in guidelines, prioritizing health care questions for guidelines, and evaluating the guideline development process. It includes three studies: 1) a methodological study on developing health outcome descriptors to define health outcomes considered in decision-making by guideline panels; 2) a methodological study and randomized controlled trial to evaluate specific criteria for panels to consider when prioritizing health care questions for guidelines and to judge the importance of health outcomes; and 3) an instrument development and validation study to create a tool for panel members to evaluate the appropriateness of the guideline development process they participate in. In these studies, we established a method and steps for creating health outcome descriptors with panels, aimed at achieving consistency in how health outcomes are considered throughout the guideline development process, from prioritization to formulating a recommendation on the basis of those outcomes. The structured approach and criteria evaluated for prioritization of healthcare questions informed panel deliberations and decisions about choosing questions for their guideline topics, and the proposed methods for outcome prioritization facilitated panels in informing what the critical and important outcomes were for decision-making. Finally, the instrument we developed facilitated members of guideline panels to provide their assessment of the guideline development process and identify strengths and weaknesses and areas for improvement. Our findings will allow organizations responsible for guideline development to apply the new methods with their panels and to evaluate their guideline processes to inform quality-improvement efforts. / Thesis / Doctor of Philosophy (PhD) / Health care guidelines, also referred to as clinical practice or public health guidelines, involve summarizing the available research evidence on a given health care topic and issuing recommendations about the best care. Guidelines allow clinicians, patients, health administrators and policy-makers to be efficiently informed and stay up to date on alternative care options, such as the best current treatments and strategies to diagnose various diseases and health conditions. Developing a guideline is a complex and multidisciplinary process that includes involving a panel of experts, typically consisting of clinicians, patients, public health professionals and other providers or consumers of health care. The panel is involved in selecting the health care questions to address (e.g. specific treatments or diagnostic strategies to evaluate), reviewing a summary of the evidence from research studies, and making judgements about benefits and harms of alternate options or strategies. The panel then formulates recommendations that give guidance on what the best options are to use for the health condition in question. The steps and approaches to develop a guideline that is considered trustworthy have been established over the past decades, including universally accepted standards. However, there remain critical research questions on how to best reach these standards, including how to best engage guideline panels in the steps. The research work presented in this thesis focuses on proposing and evaluating new methods and approaches for guidelines panels to make decisions about health outcomes, priority health care questions for guidelines, and to evaluate the guideline development process. It includes three studies: 1) a study on creating health outcome descriptors with panels to provide a commonly accepted definition of a health outcome; 2) a study to evaluate specific criteria that panels can use to prioritize health care questions, and an approach to judge the importance of health outcomes; and 3) a study to develop a survey instrument for guideline panel members to evaluate the guideline development process they participate in. In these studies, we established an approach for creating the health outcome descriptors with panels, which helped in keeping consistency with how panels understood and considered different health outcomes throughout the guideline development process. The criteria evaluated for prioritizing healthcare questions informed panel discussions and selection of questions for their guideline topics. The proposed approach for judging the importance of health outcomes helped panels to select what the critical outcomes were for making decisions about the benefits and harms of alternate options or strategies. Finally, the survey tool we created allowed members of guideline panels to provide feedback on strengths and weaknesses and areas for improvement in the process after they participated in developing a guideline. Our findings will allow organizations responsible for guideline development to apply the new methods with their panels and to evaluate their guideline processes to inform quality-improvement efforts.

Designers are constantly searching for new sourcing of inspiration for innovative design. Recently, origami has gained interest as one of these potential sources. Origami literally translated from Japanese means “paper folding” where “oru” means “to fold” and “kami” means “paper”. Since paper is insufficient to solve many engineering design problems, designers must turn to other materials. These materials will inevitably be thicker than paper and will often require different folding techniques and considerations. This thesis provides background information describing previous methods to accommodate thickness in origami-inspired design, presents a newly developed technique to address limitations of other methods, and explores the application of the technique. The newly developed technique allows designers to identify a desired motion behavior in an origami model and implement it into a thick mechanism. Many previous methods were incapable of preserving the kinematics and/or restricted usable range of motion. Understanding the capabilities and limitations of thickness accommodation methods empowers designers to better implement inspiration from origami into engineering design. The offset panel technique is further extended to include arbitrary thickness and arbitrary folding plane locations. The technique is verified through creation and testing of hardware, showcasing capabilities and limitations. Demonstration of these capabilities will serve as inspiration for furthering application of thick origami in engineering design. Preliminary work in thick origami led to the design of a thick origami-inspired medical gripper. These origami-inspired forceps, Oriceps, were designed by starting with an origami model exhibiting desired motion, grasping. The Oriceps show some challenges faced with accommodating thickness in adapting an origami model for application.

Balancing passive and interactive experiences within a narrative experience is an area of research that has broad applicability to the video game, cinematic, and comic book industries. Each of these media formats has attempted various experiments in interactive experience. The goal of this research was to better understand how to construct an interactive narrative experience that preserves the integrity of the author's story, but allows for inspired interaction by a willing audience. A study was designed to test three different conditions. The two control conditions were examples of passive narrative storytelling: the Comic Book Condition and the Cinematic Condition. The experimental condition was a hybrid format of interactive and passive storytelling, wherein the participant had the opportunity to interact with the story to further engage with the narrative world. Participants used a mobile tablet to experience each format, geared toward minimizing the separation of the participant from the story. Touch / swipe interactions were used for the hybrid format to create as intuitive of an experience as possible. Narrative Transportation, engagement, and flow were the primary evaluators of the narrative's effectiveness for each participant. An analysis of the data showed that, in general, the current Beyond Panels framework was not effective in producing higher levels of reported Narrative Transportation, engagement, or flow. However, of those participants in the Beyond Panels condition, those that interacted more consistently throughout the experience did report higher Narrative Transportation compared to those that had minimal interaction. Data was collected to better understand the relationship that optional interactivity has with these factors. The results of this study will help to further research in the areas of interactive storytelling for mobile platforms. The results will be used to continue to evolve a framework for this hybrid storytelling format called Beyond Panels.

No description available.

Agrivoltaic (AV) systems are dual-use land systems that consist of elevated solar panels with crops grown underneath. They offer a solution to the increasing demand for food production and clean renewable energy. The main concern regarding AV systems is the reduced availability of light to crops below the panels. Research to date shows that AV systems are quite productive with total energy and crop production exceeding the outputs of either solar farms or crop production alone. Research also shows that solar panels affect the microenvironment below the panels. The research on AV systems so far considers altering panel density to increase radiation to the crops by varying the distance between rows of panels in an AV solar array. This study examines the crop outputs for Swiss chard, kale, pepper, and broccoli in an AV system with different gap spacings of 2, 3, 4, or 5 feet (AV plots) between panel clusters within rows to determine how much spacing between solar panels is optimal for crop production by comparing these system yields to full sun crop production. This study also examines the effect of the AV system on crop nutrient levels, on soil water content, and crop leaf temperature below the panels. Ultimately, the biomass crop yields of AV plots are restricted significantly for Swiss chard, kale, or pepper compared against the full sun control plot yields but not for broccoli stem + leaf yields. The 4-ft or 5-ft gap distances between panels yield the highest crop biomass of the AV shaded plots. Nutrient levels tend to increase with more shade but the trend is only significant for Swiss chard nitrogen and phosphorus concentrations, pepper potassium concentrations, and broccoli phosphorus concentrations. For soil water content it is found that panels have some effect on evapotranspiration and rainfall redistribution at the soil level. Leaf temperatures in the AV plots are lower than leaf temperatures in the control plots on sunny days but not on cloudy days.

A bridge with precast bridge deck panels was built at the Virginia Tech Structures Laboratory to examine constructability issues, creep and shrinkage behavior, and strength and fatigue performance of transverse joints, different types of shear connectors, and different shear pocket spacings. The bridge consisted of two AASHTO type II girders, 40 ft long and simply supported, and five precast bridge deck panels. Two of the transverse joints were epoxied male-female joints and the other two transverse joints were grouted female-female joints. Two different pocket spacings were studied: 4 ft pocket spacing and 2 ft pocket spacing. Two different shear connector types were studied: hooked reinforcing bars and a new shear stud detail that can be used with concrete girders. The construction process was well documented. The change in strain in the girders and deck was examined and compared to a finite element model to examine the effects of differential creep and shrinkage. After the finite element model verification study, the model was used to predict the long term stresses in the deck and determine if the initial level of post-tensioning was adequate to keep the transverse joints in compression throughout the estimated service life of the bridge. Cyclic loading tests and shear and flexural strength tests were performed to examine performance of the different pocket spacings, shear connector types and transverse joint configurations. A finite element study examined the accuracy of the AASHTO LRFD shear friction equation for the design of the horizontal shear connectors. The initial level of post-tensioning in the bridge was adequate to keep the transverse joints in compression throughout the service life of the bridge. Both types of pocket spacings and shear connectors performed exceptionally well. The AASHTO LRFD shear friction equation was shown to be applicable to deck panel systems and was conservative for determining the number of shear connectors required in each pocket. A recommended design and detailing procedure was provided for the shear connectors and shear pockets. / Ph. D.