京都大学 / 新制・課程博士 / 博士(理学) / 甲第24439号 / 理博第4938号 / 新制||理||1705(附属図書館) / 京都大学大学院理学研究科化学専攻 / (主査)准教授 武田 和行, 教授 吉村 一良, 教授 北川 宏 / 学位規則第4条第1項該当 / Doctor of Science / Kyoto University / DGAM

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In seeking to create a richer learning environment in a junior high art classroom, the author develops a theory of presence. Closely connected to object-centered learning, a theory of presence in the art classroom places value on students being in the presence of, interacting with, and responding to artworks, artists, and other individuals and objects from the visual arts community. The author then describes how curricular plans are influenced by this theory of presence. Using an action research methodology, the author engages in the spiral process of planning, acting, observing, and reflecting on curriculum that explores the possibilities of connecting students with objects, artifacts, and people that privilege physical interaction and presence. Guest artist visits, utilizing a local art museum, and other methods are explored as possibilities for this to be achieved.

The purpose of this two-part study is to examine how to improve introductory level non-majors biology courses to improve student attitude and learning gains in the sciences. The first part of this study examines the collective effect of three different pedagogies (service learning, concept mapping and guest lectures) on student attitude and learning gains in a freshman, non-majors biology course. Two classes, one with the three pedagogies, and one without, were compared. Data were collected from two classes in Fall 2008 (one treatment and one control) and two similar classes replicated in Fall 2009. Learning and attitude gains were measured by a pre and post biology assessment and the Student Assessment of Learning Gains (SALG) survey. Our findings indicate that the treatment methods did not improve student learning or attitudes compared to the control group. However, there was a significant increase in variability in the treatment group, indicating that the students exposed to the three pedagogies either had a very positive experience or a negative one, whereas the control group did not have this variability. Thus, the treatment did have a positive effect on some students. Both treatments experienced significant gains from pre to post on the biology assessment and SALG survey. The second part of the study investigated what concepts are considered by students and faculty to be most important to teach in introductory non-majors biology courses. A survey with 17 biology concepts was given to life science professors at BYU and UVU and biology students at BYU. Participants were asked to rank the concepts from most to least important. There were significant differences between professor and student mean rankings for 11 of the 17 biology concepts. This study showed a large discrepancy between what professors want students to learn and what students feel is important. It was particularly noteworthy that students ranked ecology and evolution as least important. This was especially alarming since evolution is considered to be the capstone of all biology and ecology is vital for capturing the "big picture" in biology.

Queue lines are a fundamental inevitably of the modern theme park. Parks have begun to introduce various systems for combating the normal queue, some of which are at no extra cost to guests and some of which are an extra cost. These systems feature a variety of methods by which guests can bypass the normal queue and enter one featuring a minimal wait. Parks have also started to introduce elements within queues that make waiting in them easier and change guests’ perception of time, thus making the waits seem shorter. This thesis attempts to determine the attitudes of guests towards these new trends as well as traditional queuing. Experiences and perceptions of queues from theme park guests were collected and have been compared with existing literature on guest satisfaction, theme parks and queue lines in order to determine relationships between current practices and theory. The findings from these relationships resulted in several suggestions for theme parks to take into account as queues continue to evolve in order to best suit guest needs.

The thesis work described herein explores two avenues of post-functionalization of conjugated polymers using ‘click’ chemistry. The first avenue utilizes the Strain-Promoted Alkyne-Azide Cycloaddition (SPAAC) and the second an Inverse Electron-Demand Diels-Alder (IEDDA). In the first part of this thesis, various azide moieties were SPAAC ‘clicked’ onto a dibenzocyclooctyne-containing polymer, such as small molecules like para-phenyl-nitroazide, as well as larger azide-terminated chains like polystyrene and polyethylene glycol. Host-guest chemistry and self-healing organogels were also explored. The synthesis of each component, including the cyclooctyne diamine monomer, dialdehyde comonomer, resulting polymer, various azide moieties, as well as the SPAAC click reactions, are all described in detail along with extensive characterization. Similarly, the second part of this thesis involved the synthesis and characterization of several components, including the tetrazine monomer, fluorene comonomer, resulting polymer, and various TCO derivatives for the post-polymerization IEDDA ‘click’ reactions onto the backbone. Some of the click reactions described include small molecule TCO derivatives, polymeric PEG TCO, and a difunctional linker to generate a crosslinked foam. / Conjugated polymers attract significant attention due to their interesting optoelectronic and physical properties. Over the past few decades, tremendous effort has been devoted to expanding the structural diversity and applications of this class of macromolecules. The pursuit of structural variability of conjugated polymers has resulted in a broad range of research to understand their structure-property relationships via functionalization. This functionalization is crucial for tailoring performance in any given application. Thus, the ability to synthesize a library of homologous polymers would prove very useful. Efficiency is of utmost importance when creating a library of homologous conjugated polymers, as the faster a library can by synthesized, the sooner said polymers can be screened for any desirable properties. Such an approach requires a post-polymerization functionalization strategy, whereby a progenitor polymer undergoes efficient reactions at each repeat unit of the backbone. The work presented in this thesis involves synthesizing a reactive conjugated polymer scaffold, followed by efficiently post-polymerization functionalization via “click” chemistry. Two elegant click reactions are described in this work; the Strain-Promoted Alkyne-Azide Cycloaddition (SPAAC) and Inverse Electron-Demand Diels-Alder (IEDDA). The SPAAC reaction allowed for rapid functionalization of triazole moieties on a dibenzocyclooctyne-containing polymer backbone, creating a small polymer library with a consistent degree of polymerization (DP). Grafting with polystyrene and polyethylene glycol azide-terminated polymers allowed the efficient syntheses of a series of graft-co-polymers with Mn values up to 800 kDa and varying solubilities. Secondly, The IEDDA reaction was applied to a poly(tetrazine-co-fluorene) conjugated polymer, which resulted in the rapid and quantitative functionalization of the polymer backbone with trans-cyclooctene derivatives. These reactive conjugated polymers were explored in a variety of applications, including supramolecular chemistry and gel formation. / Thesis / Doctor of Philosophy (PhD) / Conjugated polymers are a class of macromolecular materials that attract significant attention due to their interesting behaviors and properties. Under certain conditions, these polymers even display conductivities like that of metals. As such, they show promise in applications such as organic solar cells, chemical sensors, organic light-emitting diodes, and supercapacitors. Over the past few decades, tremendous effort has been devoted to expanding on the types of conjugated polymers as well as their structural diversity. This, of course, has resulted in polymers that exhibit vastly different behaviours depending on what they are made of. As certain applications (e.g.: solar cells) require polymers with very specific properties, being able to ‘tune’ a conjugated polymer to ‘match’ a required property would be extremely useful. This tuning of polymer properties can be successfully accomplished by attaching different structures onto the polymer chain by utilizing a reaction known as ‘post-polymerization functionalization’. In doing so, a starting reactive polymer can be transformed into an entirely different polymer with specific chemical properties and behaviors. The work presented in this thesis involves synthesizing two types of conjugated polymers and attaching various structures onto their backbones to yield different properties. The synthesis, characterization, and potential applications of said polymers are described herein.

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