abstract: The overall purpose of this study was to explore the dynamics of teaching and learning in the context of an informal, online discussion forum. This investigation utilized the Community of Inquiry (CoI) elements of Teaching Presence and Social Presence along with the construct of Learning Presence to examine Adobe® Forums, Photoshop® for Beginners Forum (PfBF) an internet discussion forum designed to provide support for beginning users of Adobe Photoshop. The researcher collected four days of discussion post data comprising 62 discussion threads for a total of 202 discussion posts. During this initial pilot analysis, the discussion threads were divided into posts created by members who were deemed to be acting as teachers and posts written by members acting as learners. Three analyses were conducted. First, a pilot analysis was conducted where the researcher divided the data in half and coded 31 discussion threads and a total of 142 discussion posts with the Teaching Presence, Social Presence and Learning Presence coding schemes. Second, a reliability analysis was conducted to determine the interrater reliability of the coding schemes. For this analysis two additional coders were recruited, trained and coded a small subsample of data (4 discussion threads for a total of 29 discussion posts) using the same three coding schemes. Third, a final analysis was conducted where the researcher coded and analyzed 134 discussion posts created by 24 teachers using the Teaching Presence coding scheme. At the conclusion of the final analysis, it was determined that eighteen percent (18%) of the data could not be coded using the Teaching Presence coding scheme. However, this data were observed to contain behavioral indicators of Social Presence. Consequently, the Social Presence coding scheme was used to code and analyze the remaining data. The results of this study revealed that forum members who interact on PfBF do indeed exhibit Teaching Presence behaviors. Direct Instruction was the largest category of Teaching Presence behaviors exhibited, over and above Facilitating Discussion and Design and Organization. It was also observed that forum members serving in the role of teachers exhibit behaviors of Social Presence alongside Teaching Presence behaviors. / Dissertation/Thesis / Doctoral Dissertation Educational Technology 2014

The increasing availability of modern head-mounted displays have spurred interest in social virtual reality (VR) applications, but their immersion-inducing features limit the use of important nonverbal social cues in multiuser contexts. Embodied avatars have proven useful in increasing the social affordances of real-time rendered VR applications but remain underexplored in cinematic virtual reality (CVR). In the present study, three different conditions were evaluated in co-located CVR where participants watched 360° videos together in pairs; one condition had no visual representation of the co-watcher, one condition had a translucent cone representing the co-watcher’s viewing direction, and one condition had both the cone and a set of hands representing the co-watcher. Social presence was measured through the Networked Minds Social Presence Inventory and a semantic differential scale, presence was measured through the iGroup Presence Questionnaire, and participants’ use of implicit and explicit spatial references (i.e., “there” versus “next to the blue house”) was analyzed. The results indicate that simple embodied avatars can increase presence and social presence in CVR, and lead to more face-to-face-like verbal behavior. / Intresset för sociala VR-applikationer har stigit i takt med spridningen av moderna VR-glasögon, men applikationer för två eller fler användare är svåra att realisera i och med att glasögonen blockerar viktiga ickeverbala sociala signaler. I realtidsrenderad VR har de sociala interaktionsmöjligheterna kunnat förbättras genom så kallade embodied avatars men deras effekt har hittills inte undersökts i cinematisk VR (CVR). I den här studien utforskades tre betingelser av embodied avatars i ett CVR-experiment där deltagarpar tittade på 360° filmer tillsammans i ett rum. En betingelse saknade avatar, i en betingelse representerades ens partners blickfång av en halvgenomskinlig kona, och i en betingelse representerades ens partner av både konan samt ett par virtuella händer. Social presence mättes genom the Networked Minds Social Presence Inventory och en semantic differential scale, presence mättes genom the iGroup Presence Questionnaire, och deltagarnas användning av implicita (”där”) och explicita (”bredvid det blå huset”) spatiala uttalanden analyserades. Resultaten visar att enkla embodied avatars kan öka både presence och social presence i CVR, samt leda till verbal kommunikation som liknar den vi använder i när vi interagerar ansikte mot ansikte.

The hydrological regime in Arctic catchments is being altered as an effect of climate change. To be able to project future changes in Arctic hydrology and hydrogeology, the mechanisms and drivers affecting runoff generation needs to be understood. This thesis aims to investigate and compare rainfall-runoff processes in three hillslope subcatchments, one glacierized and one non-glacierized catchment, in the Arctic. By estimating catchment response parameters and using recession analysis it was found that soil layer extent, rather than catchment size, explained differences in catchment response. The character of the rainfall events was a dominant factor affecting catchment response in both the glacierized and non-glacierized catchment. Saturation excess overland flow was a runoff-generating process in all catchments. Furthermore, permafrost and glacier presence, as well as meltwater contribution to the streams, were suggested to result in a larger variability in catchment response and storage contribution along the hillslopes and the glacierized catchment. Meanwhile, the wetness of the non-glacierized catchment was suggested to influence the storage-discharge dynamics in the non-linearized catchment. Water height recession analysis was not considered reliable to characterize aquifer properties in the catchments. However, it was able to describe the changes in storage-discharge relations over time in Arctic catchments.

Family Presence During Resuscitation (FPDR) remains controversial and is not consistently implemented during resuscitation events or invasive procedures. Evidence has demonstrated positive outcomes produced by implementation of FPDR; such as, decreased rates of post-traumatic stress symptoms, decreased symptoms of anxiety, and depressive symptoms were not significantly different. Unfortunately, use of FPDR in the acute care setting is not widely accepted or readily implemented. The primary purpose of this integrative literature review is to evaluate the use of FPDR in the acute care setting. The secondary purpose is to evaluate the health care professional's level of perceived value associated with the outcome of having family present during resuscitation. A systematic literature search was conducted using multiple databases for relevant articles in the English language between 2006 to 2017, including Cumulative Index to Nursing and Allied Health Literature (CINAHL), Educational Resources Information Center (ERIC), Elton B. Stephens Co. Host (Ebsco Host), Medical Literature On-line (Medline), Psychological Information Database (PsychINFO), and PubMed. Search terms included 'family presence during resuscitation', 'family presence', 'pediatrics', 'nurse perceptions', and 'perceptions'. Ten of the nineteen articles suggest the use of FPDR leads to positive outcomes such as decreased post-traumatic symptoms, and decreased anxiety for family members. The use of FPDR can enhance family members' understanding of resuscitation efforts and involves them in their loved one's care. This integrative review indicates the implementation of FPDR can provide benefits for family members of those undergoing CPR and invasive procedures; although the perceptions of the healthcare team remain the barrier to its use.

This thesis is a contribution to design-led research and addresses a readership in the fields of architecture as well as in media and communications. In juxtaposing the tools of the designer (e.g. drafting, prototyping, visual/textual/spatial forms of montage) with those of architectural theory, this thesis seeks to extend the disciplinary boundaries of architecture by observing its assimilation of other media practices. Its primary contribution is to architectural design and theory, and its aims are twofold: Firstly, this thesis applies the concepts of virtual and mediated space to architecture, proposing an extended architectural practice that assimilates the concept of remote presence. Through realized design examples as well as through the history and theory of related concepts, the thesis explores what designing mediated spaces and designing for presence entails for the practicing architect. As a fusion of architecture and media technology, video-mediated spaces facilitate collaborative practices across spatial extensions while simultaneously fostering novel and environmentally sustainable modes of communication. The impact of presence design on workplace design is examined. As an extended practice also calls for an extended discourse, a preliminary conceptual toolbox is proposed. Concepts are adapted from related visual practices and tested on design prototypes, which arise from the author’s extensive experience in designing work and learning spaces. Secondly, this thesis outlines presence design as a transdisciplinary aesthetic practice and discusses the potential contribution of architects to a currently heterogeneous research field, which spans media space research, cognitive science, (tele)presence research, interaction design, ubiquitous computing, second-order cybernetics, and computer-supported collaborative work. In spite of such diversity, design and artistic practices are insufficiently represented in the field. This thesis argues that presence research and its discourse is characterised by sharp disciplinary boundaries and thereby identifies a conceptual gap: presence research typically fails to integrate aesthetic concepts that can be drawn from architecture and related visual practices. It is an important purpose of this thesis to synthesize such concepts into a coherent discourse. Finally, the thesis argues that remote presence through the proposed synthesis of architectural and technical design creates a significantly expanded potential for knowledge sharing across time and space, with potential to expand the practice and theory of architecture itself. The author’s design-led research shows that mediated spaces can provide sufficient audiovisual information about the remote space(s) and other person(s), allowing the subtleties of nonverbal communication to inform the interaction. Further, in designing for presence, certain spatial features have an effect on the user’s ability to experience a mediated spatial extension, which in turn, facilitates mediated presence. These spatial features play an important role in the process through which trust is negotiated, and hence has an impact on knowledge sharing. Mediated presence cannot be ensured by design, but by acknowledging the role of spatial design in mediated spaces, the presence designer can monitor and, in effect, seek to reduce the ‘friction’ that otherwise may inhibit the experience of mediated presence. The notion of ‘friction’ is borrowed from a context of knowledge sharing in collaborative work practices. My expanded use of the term ‘design friction’ is used to identify spatial design features which, unaddressed, may be said to impose friction and thus inhibit and impact negatively on the experience of presence. A conceptual tool-box for presence design is proposed, consisting of the following design concepts: mediated gaze, spatial montage, active spectatorship, mutual gaze, shared mediated space, offscreen space, lateral and peripheral awareness, framing and transparency. With their origins in related visual practices these emerge from the evolution of the concept of presence across a range of visual cultures, illuminating the centrality of presence design in design practice, be it in the construction of virtual pictorial space in Renaissance art or the generative design experiments of prototypical presence designers, such as Cedric Price, Gordon Pask and numerous researchers at MIT Media Lab, Stanford Institute and Xerox PARC. / QC 20100909

This thesis comprises a critical review and suggestions for enhancement of the Community of Inquiry Framework (CoIF), the frequently cited model of collaborative community-based online learning. It combines a systematic engagement of relevant literature and research, with the application of the CoIF thinking to six of my peer-reviewed publications. Although not initially conceived as forming part of a doctorate submission, these publications are drawn upon throughout this narrative, to assist my interrogation of the CoIF. They are also used to provide evidence of my continuing journey as an education researcher. This thesis is therefore not an exegesis – a traditional meta-narrative encompassing this candidate’s publications. It moves beyond my findings in the publications to create and present supplementary concepts, and develop pointed guidance about using the Framework in supporting online learning in tertiary education. My review first critically interrogates the three constituent elements or Presences of the CoIF. Social presence emerges as a highly complex and multi-faceted construct, in which the de-emphasising of the affective in the CoIF seems at variance with current research reporting the strong student emotional response to working online, and particularly in collaborative, community-based groupings. Then, in Cognitive presence, there has been little consideration of, and specificity about, reflection in the CoIF. My critique proposes that reflection and critical thinking are distinct but inter-related concepts; both of which need to be addressed. Teaching presence is renamed ‘Tutoring presence’ informed by my review based upon my emergent understandings of student-centred learning. Two enhancements to the CoIF are then proposed, together with the rationale for establishment of a Tutors’ Network. The first enhancement, referred to as 'the Influences,’ unites and enriches the individual Presences. The second argues for the existence and use of a personal learning retreat at the heart of a community of inquiry, addressing a perceived omission in the CoIF. This learner ‘space’ provides a ‘quiet, safe place’ for the private (internal) world of the learner, as a foil to the shared collaborative space in the CoIF (the external world). Finally, a Tutors’ Network is outlined as a vehicle for advancing their understandings and knowledge of online, collaborative, community-based learning in general, and in particular of communities of inquiry. This should develop the abilities of online tutors, improve their learners’ educational experiences and encourage research and scholarship into the CoIF.

Understanding of the fate of oil in the environment is of utmost importance; however, accurate, predictive models are still in very early stages. To aid in the development of these models, photodegradation of selected polycyclic aromatic hydrocarbons (PAHs) in an n-alkane hydrocarbon matrix was followed for individual PAHs and mixtures of PAHs similar to that found in the Deepwater Horizon spill. Tetracene in tetradecane photodegraded quickest of all observed PAHs, with a loss of 99% after only one hour of irradiation. Binary mixtures of PAHs showed different degradation amounts, including changes in PAH kinetics. These results suggest that the formation of dimers or aggregates as well as photosensitization reaction is important in the degradation of PAHs in oil. Kinetics of PAH photodegradation and PAH sensitized photodegradation will be presented. This information will provide a better understanding of the fate of oil in environmental systems.

Interaction is a core element in the design of blended and distance learning environments. The importance of understanding these interactions and what might increase effectiveness of such interactions in education is paramount for meaningful learning. This dissertation consists of two qualitative case studies designed to provide a rich, descriptive look at interactions in a high school distance/blended-learning context in the home-study and technology-meditated seminary program of The Church of Jesus Christ of Latter-day Saints. In the study article, Moore's (1989) interaction framework was used as a lens for understanding the learner experience. Thematic narratives were used to highlight themes related to students' perceived learning gains from learner-content interaction and their hesitancy to engage in learner-learner and learner-instructor interactions if they had not met personally. In the second study, Garrison's (2007) Community of Inquiry framework was used to understand the impact that teacher decisions, other than the selection of content, had on the cognitive and social climate of the learning experience. This study describes how a teacher's facilitation of social interaction influences the course learning outcomes. The results highlight the teacher's role in providing the educational and social climate needed to foster learner interactions. This study noted that when the teachers gave learners the opportunity to interact in a live setting, it appeared to foster the relationships needed to interact online. The narratives also highlight how a teacher helped learners interact with one another around content online.

Recently, the numbers of Higher Education institutions that are using Web 2.0 technologies and social networking sites are increasing dramatically. These sites offer unique and diverse learning opportunities. There is evidence that a sense of community can be created online and that this community is connected with perceived learning. Garrison, Anderson and Archer (2000) introduced and developed the Community of Inquiry framework as a dynamic process model and a comprehensive framework to guide the research and practice of online learning communities, and to describe and measure elements supporting the development of these communities. This framework consists of three elements - social, teaching and cognitive presence - as well as categories and indicators to define each presence and guide the coding of transcripts. The categories of social presence are affective responses, open communication and group cohesion. The categories of teaching presence are instructional design and organisation, facilitating discourse and direct instruction. Previous studies suggest that a positive social climate on an online learning community is important as it can improve learning experience and cognitive presence. This study aims to explore and understand the nature of Community of Inquiry presences, in particular teaching presence and social presence. The aim of the study is to understand the influence of a different teaching presence on students’ development of social presence. This study provides a more comprehensive picture of developing students’ social presence over changing teaching presence in a social network environment in a Kuwaiti higher education context. In order to achieve the purpose of this study, the following research questions are explored: 1- How does a students’ sense of social presence change with a different teaching presence in the social network environment within a Kuwaiti higher education context? a. Does a students’ sense of social presence (affective responses, open communication and group cohesion) change as a result of a different teaching presence (facilitating discourse - direct instruction) in the social network environment in a Kuwaiti higher education context? b. Why do participants maintain or change their social presence level during the course? 2- How does the use of teaching presence promote the development of students’ social presence in a Kuwaiti higher education context within the social network environment? The study was conducted in the second semester of 2010/2011 at The Education Technology Department - The College of Basic Education - The Public Authority for Applied Education and Training (PAAET), within the State of Kuwait. The study was carried out on the Educational Communication module and involved 46 male participants. This study uses the equivalent of mixed methods design to answer research questions. The sequential explanatory strategy is embedded within an applied quasi-experimental approach. Quantitative data is collected and analysed, which is then followed by the collection and analysis of qualitative data. The researcher used a messages analysis and a content analysis approach to reveal the level of social presence in an online community and then develop stimulated recall interview questions. A combination of individual interviews and focus group interviews were used. Garrison et al.’s (2000) social presence coding schemes were developed to make them more suitable in the study context. Quantitative and qualitative data show that there is no significant difference between the effects of facilitating discourse and direct instruction in terms of students’ social presence level. Stimulated recall interviews reveal that most participants cannot distinguish between facilitating discourse and direct instruction. The participants believe that facilitating discourse and direct instruction are similar. The participants’ responses lead the researcher to search for other motives that could promote the development of students’ social presence in the higher education context in the social network environment. The study concludes that there are two factors that could promote the development of students’ social presence. First, instructional design and organisation, such as web design satisfaction, network effect, instructor responsiveness, the nature of the task and awarding degrees. Second, learner-specific matters, such as previous experience, peer influence, friendship, attitude, self-esteem and self-confidence and something I refer to as the Wave Effect.

Approved for public release; distribution in unlimited. / This thesis examines the U.S. policy for employing military forces across the globe. The major transformational trends in improving U.S. military capabilities over the past two decades, and the changing international security environment have impacted the way in which American leaders focus on the global military posture strategy. The American military interventions in Iraq, Kosovo and Afghanistan help determine whether the United States has demonstrated true global reach capability without the advantage of permanent forward operating bases. The Philippines-U.S relationship provides an opportunity to assess whether the United States has demonstrated the capability and commitment to defend its national interests and its ally and to maintain peace and stability despite the removal of major U.S. bases. U.S. capability and commitment may allow greater flexibility in choosing alternatives to the current policy of permanent forward basing around the globe.