Guiding navigation in virtual environments (VEs) is a challenging task. A key issue in the navigation of a virtual environment is to be able to strike a balance between the user's need to explore the environment freely and the designer's need to ensure that the user experiences all the important events in the VE. This thesis reports on a study aimed at comparing the effectiveness of various navigation cues that are used to motivate users towards a specific target location. The results of this study indicate some significant differences in how users responded to the various cues.

The research reported in this dissertation investigates the impact that accountability systems have on the design and development of student centered learning environments. The nature of student-centered learning environments (SCLEs) in this study is framed theoretically by cultural historical activity theory (CHAT). The investigation itself occurred within a specific practice context: an urban charter school serving elementary-aged children. The efforts to design and develop SCLEs in the school focused on the use of improvement inquiry by groups of stakeholders organized into a developing human ecology in educational contexts called networked improvement communities. The research sought to determine (1) how accountability systems influenced instructional practices within the school and (2) how practicing teachers perceived the assessments embedded within the accountability systems. Data were collected via surveys, interviews, and a focus group. The data from the surveys and interviews informed the work for the focus group. The work from the focus group generated a stakeholder-generated “theory of practice improvement” in the form of an illustrative driver diagram. The driver diagram contributed an empirically generated proposal for how improved instructional practices might be pursued at the school. The investigation concluded with recommendations for implementing the plan within the school and recommendations to the broader field of education to engage more deeply in improvement inquiry. / School of Education; / Professional Doctorate in Educational Leadership (ProDEL) / EdD; / Dissertation;

Changes in the field of education require teachers’ acquisition of specific knowledge of technology and the skills of its effective use in the classroom. With the expansion of the traditional classroom to include virtual learning environments, concern still exists regarding characteristics necessary for quality teaching and learning.<br> This research is an examination of pre-service teachers’ needs relevant to integrating technology in an online learning environment. It is a first step toward acknowledging the responsibility teacher preparation programs have in the formation of educators equipped to instruct in dual learning environments, thus providing pre-service teachers with opportunities and experiences to become fluent in the technological pedagogical content knowledge (TPACK) required for online learning environments as well as the traditional face-to-face instruction. <br> The purpose of this study was to determine if active engagement with content of an online instruction module would affect the attitudes, knowledge and skills, and instructional centeredness of pre-service teachers’ towards technology integration in an online learning environment. A mixed-methods concurrent triangulation design procedure was utilized to measure characteristics of pre-service teachers in a teacher preparation program. A two-way within-subjects analysis of variance was conducted to evaluate the effect of engagement with the content of the online instruction module for all three domains. Participants began the intervention with limited knowledge and skills of technology integration and online learning environments; however, they made statistically significant gains upon completion of the intervention. The implementation of an intervention such as this online instruction module may support other teacher preparation programs in identifying strengths and weaknesses of their pre-service teachers and provide valuable information necessary to guide program goals. / School of Education; / Instructional Technology (EdDIT) / EdD; / Dissertation;

Drop Towers provide brief terrestrial access to microgravity environments. When used for capillary fluidics research, a drop tower allows for unique control over an experiment's initial conditions, which enables, enhances, or otherwise improves the study of capillary phenomena at significantly larger length scales than can normally be achieved on the ground. This thesis provides a historical context for the introduction of a new, highly accessible, 2.1s tower design used for capillary research and presents a variety of demonstrative experimental results for purely capillarity-driven flows leading to bubble ingestion, sinking flows, multiphase flows, and droplet ejections. The focus of this thesis is paid to capillarity-driven droplet ejection including historical significance, mathematical models, criteria for ejection and experimental validation. A scale analysis provides a single parameter Su+ which is used to predict the flow velocity at the base of the nozzle. By simplifying the flow in the nozzle we identify two criteria for auto-ejection, the nozzle must be `short' and the velocity of the flow must be sufficient to invert the liquid meniscus and overpower surface tension at the nozzle tip such that We⁺ > 12. Drop tower experiments are conducted and compared to analytical predictions using a regimemap. This thesis also includes results from experiments experiments conducted in a stationary ground-based laboratory and aboard the International Space Station which clearly demonstrate droplet ejection in regimes from transient liquid jets to large isolated drops. Droplets generated in a microgravity environment are 106 times larger than 1g₀ counter-parts.

Approved for public release, distribution is unlimited / This thesis investigates user interfaces for locomotion in virtual environments (VEs). It looks initially at virtual environments and user interfaces, then concentrates on locomotion interfaces, specifically on the Omni-Directional Treadmill (ODT) (Darken and Cockayne, 1997) and a new virtual walking device, LocoX, which was developed at the MOVES Institute, Naval Postgraduate School. It analyzes and compares the ODT and LocoX in terms of the application of human ability requirements (HARs). Afterwards, it compares the results of the analysis of the ODT and LocoX to real-world locomotion. The analysis indicates that LocoX, a new way of exploring virtual environments (VEs), provides a close match to real locomotion on some subtasks in VEs-- compared to the ODT--and produces relatively closer representation on some subtasks of real world locomotion. This thesis concludes that LocoX has great potential and that the locomotion provided is realistic enough to simulate certain kinds of movements inherent to real-world locomotion. LocoX still requires maturation and development, but is nonetheless a viable locomotion technique for VEs and future game-based simulations. / Lieutenant Junior Grade, Turkish Navy

The phenomenon called “The Internet of Things” makes it possible for organizations in the public and private-sector to handle resources better, enhance their performances, and to establish new ways of developing business models. Connected devices can contribute valuable knowledge through real-time updates and help with monitoring and/or to analyze how people and resources behave through the value-chain. This paper aims to investigate how current Smart Environments in public settings are functioning with the data collection in mind, and the integrity behind it. We also shed some light on how prepared they are for the new GDPR Law. Our goal is to come up with knowledge about how organizations and companies are working with integrity and data gathering, when they are transforming their public environment into a Smart Public Environment.

How might interior environments play a role in promoting life long well being? According to Passarino, et al., genetic variety only accounts for about 25% of the variation of human longevity. A combination of diet, environment and exercise comprise the greatest factors. The amount of time Americans spend indoors presents a challenge to increasing physical activity: the Environmental Protection Agency (EPA) states that Americans spend 93% of their lives indoors (Roberts, 2016). Therefore, if physical activity is crucial to living longer, the design of interior environments could logically be a critical factor in promoting natural movement and sustaining lifelong well-being. National Geographic fellow Dan Buettner identified five “Blue Zones” throughout the world where people naturally live longer: Ikaria, Greece; Okinawa, Japan; Oligastra Region, Sardinia; Loma Linda, California; and Nicoya Peninsula, Costa Rica. These regions have unusually high concentrations of centenarians who had grown old without noticeable signs of heart disease, obesity, cancer or diabetes (Buettner, 2015). Buettner identified nine common principles that universally characterize well-being in the Blue Zones. The first, and most crucial to design in the built environment, is to “move naturally.” Healthy centenarians, Buettner says, “live in environments that constantly nudge them into moving” (Buettner, 2015). This research will seek to translate Blue Zone principles aimed at promoting continued well-being through natural movement that can inform principles for the creation of interior environments. RESEARCH METHODOLOGIES Further analysis of Blue Zones principles will address specific conditions and behaviors that encourage natural movement. A literature review and case studies will be presented that show a correlation between natural movement within the built environment and measurable increases in healthy outcomes. The example projects include La Maison de Verre, Paris, France; L’Unité d’Habitation à Marseille, France; and Tea House, Bethesda, Maryland. Interior design that encourages regular natural movement occurs primarily in the design of a building’s major circulation systems and its program (Center for Active Design, 2010). Corridors, elevators and lobbies that connect other spaces in the program encourage walking. Elements like stairs, bicycle storage and furniture that produces micro-movement promote activity when they are visible, safe and attractive. Programmed spaces that encourage physical activity like dance/movement studios and those that promote healthy diets also lead to increases in healthy behaviors, which ultimately lead to increased longevity. Using these guides, a building in Richmond, Virginia will be redesigned as a micro-Blue Zone that could be used as a model for promoting increased life long well being. This two-level adaptive reuse, mixed use commercial project will address vertical transitions, social spaces and outdoor relationships that encourage residents and visitors to move throughout the day.

Recent years have seen progress in the analysis of the heat kernel for certain reversible random walks in random environments. In particular the work of Barlow(2004) showed that the heat kernel for the random walk on the infinite component of supercritical bond percolation behaves in a Gaussian fashion. This heat kernel control was then used to prove a quenched functional central limit theorem. Following this work several examples have been analysed with anomalous heat kernel behaviour and, in some cases, anomalous scaling limits. We begin by generalizing the first result - looking for sufficient conditions on the geometry of the environment that ensure standard heat kernel upper bounds hold. We prove that these conditions are satisfied with probability one in the case of the random walk on continuum percolation and use the heat kernel bounds to prove an invariance principle. The random walk on dynamic environment is then considered. It is proven that if the environment evolves ergodically and is, in a certain sense, geometrically d-dimensional then standard on diagonal heat kernel bounds hold. Anomalous lower bounds on the heat kernel are also proven - in particular the random conductance model is shown to be "more anomalous" in the dynamic case than the static. Finally, the reflected random walk amongst random conductances is considered. It is shown in one dimension that under the usual scaling, this walk converges to reflected Brownian motion.

The thesis investigated the use of combination of sections using learning steps in the development of courseware presentation in the 3D Virtual Worlds platform. The technical objective of the study is to present the design of multisection strategy in developing healthcare course in 3D Virtual World online environment. The main aim of this study is to know the effects of multisection [objective, tutorial (with or without video), quiz and test] sections incorporation in an online 3D Virtual World towards the usability. The empirical research described in this thesis comprised three experimental phases. In the first phase, an initial experiment was carried out with 21 users to explore the usability and learning performance of courseware created using 3D the Virtual World platform of Second Life. The second experiment phase involved an experiment conducted with 30 users to investigate their perception, satisfaction and performance of the role of each main section involved in Virtual World courseware. In the third phase, a total of 30 users experimentally examined a unique approach to the use of video segment added in the Tutorial section of the OTQT framework. The overall obtained results demonstrated the usefulness of the tested multisection to enhance the development of healthcare course in an online learning of 3D Virtual World program. These results in three experiments provided a set of unique and empirically derived guidelines for the design and the use of three multisection frameworks to generate more usable courseware in the 3D Virtual Worlds of an online learning interface. For example, when designing avatars as animated virtual lecturers in e-learning interfaces, specific facial expression and body gestures should be incorporated due to its positive influence in enhancing learners' attitude towards the learning process.

Technologists predict that electronic information dissemination will create a paperless work environment. In spite of such predictions, paper-based internal communication will remain the primary medium for disseminating information in organizations for decades to come. However, electronic technology will have an impact on paper information production that may be more profound than changes following word processing's introduction. Previously unavailable for everyday production to enhance word meaning, certain graphic techniques now can be used to access readers' preconditioned symbol meanings to increase comprehension of routine correspondence and information internalization. This quasi-experimental field study examines interactions among laser-printer graphic treatment and communication variables as contributors to explaining variance in comprehension. Set Multiple Regression/Correlation analysis identifies significant variance explained by conditional relationships between near-typeset quality text and readers' self-interest and between near-typeset quality text and text's readability. The conditional relationship of near-typeset quality and self-interest shows increase in reader comprehension at a greater rate than the comprehension increase rate attributed to the reader's self-interest increase alone. This suggests that conditional relationships may be accessing an internal judgment process interpreting greater self-interest in near-typeset printed text. The conditional relationship between near-typeset quality and readability reveals that at more difficult reading levels comprehension is greater for near-typeset text. The significance of this relationship indicates that an internal judgment process is involved rather than the difference being attributed to legibility treatment. The strength of these conditional relationships suggests that planning for communication policies and practices should be a part of organizational strategic planning in the same ways as are financial analysis, operations planning, or human resource management.