\u3ci\u3eArcynopteryx Compacta\u3c/i\u3e (Plecoptera: Perlodidae), A Holarctic Stonefly Confirmed From Lake Superior, With a Review and First Checklist of the Stoneflies of Michigan

Arcynopteryx compacta, a northern Holarctic species, is confirmed from Lake Superior along the Keweenaw Peninsula of Michigan\u27s Upper Peninsula. A checklist of stoneflies of Michigan is provided, reporting 58 species plus a list of an additional 19 species that are likely to occur in the state

‘Paper houses’: John Macarthur and the 30-year design process of Camden Park

Camden Park, the mansion built from 1831-35 on land first granted to pastoralist John Macarthur in 1805 in the Cowpastures district south-west of Sydney, is one of the most significant, and intact examples of Australian colonial domestic architecture. Recent studies have highlighted Macarthur’s interest in architecture, and discussed the numerous schemes he both considered and seemingly rejected for the estate. These designs, most of which never left the page, survive in a large collection of drawings which are today contained within the Macarthur Papers at the State Library of New South Wales and in the archives at Camden Park itself. «br /» «br /» The full design history of Camden Park is a complex sequence of commissions and abandoned designs, subject to the changing fortunes, resources and politics both of the Macarthur family and wider colony and, ultimately, to the fluctuating physical and mental health of John Macarthur himself. Through an analysis of the plans, this research establishes a design sequence that links the series of unbuilt schemes for houses at Camden, Parramatta and Pyrmont by Henry Kitchen and Henry Cooper, James Smith and John Verge, the cottages ornée Belgenny and Hambledon, and the design of Elizabeth Farm at Parramatta, to the final neo-Palladian house that we see today. In doing so it demonstrates that Verge’s realised scheme was the final stage of a continual design process that had begun many years earlier, where the fundamental spatial concepts of the final design was ever-present, and which was driven by Macarthur. «br /» «br /» This dissertation also presents a diagnosis of Macarthur’s mental and physical state, and biographical studies of the ill-fated architect Henry Kitchen and his eventual successor in Macarthur’s employ, Henry Cooper. In reconstructing each stage of Camden Park's design process, it shows how the psychology, world-view and motivation of a pivotal colonial figure were to give a distinct form to the house he deemed worthy of his family and above all for his wife, Elizabeth

The Cellular Architecture of the Larval Zebrafish Tectum, as Revealed by Gal4 Enhancer Trap Lines

We have carried out a Gal4 enhancer trap screen in zebrafish, and have generated 184 stable transgenic lines with interesting expression patterns throughout the nervous system. Of these, three display clear expression in the tectum, each with a distinguishable and stereotyped distribution of Gal4 expressing cells. Detailed morphological analysis of single cells, using a genetic “Golgi-like” labelling method, revealed four common cell types (superficial, periventricular, shallow periventricular, and radial glial), along with a range of other less common neurons. The shallow periventricular (PV) and a subset of the PV neurons are tectal efferent neurons that target various parts of the reticular formation. We find that it is specifically PV neurons with dendrites in the deep tectal neuropil that target the reticular formation. This indicates that these neurons receive the tectum's highly processed visual information (which is fed from the superficial retinorecipient layers), and relay it to premotor regions. Our results show that the larval tectum, both broadly and at the single cell level, strongly resembles a miniature version of its adult counterpart, and that it has all of the necessary anatomical characteristics to inform motor responses based on sensory input. We also demonstrate that mosaic expression of GFP in Gal4 enhancer trap lines can be used to describe the types and abundance of cells in an expression pattern, including the architectures of individual neurons. Such detailed anatomical descriptions will be an important part of future efforts to describe the functions of discrete tectal circuits in the generation of behavior

Composition closed premodel structures and the Kreweras lattice

We investigate the rich combinatorial structure of premodel structures on finite lattices whose weak equivalences are closed under composition. We prove that there is a natural refinement of the inclusion order of weak factorization systems so that the intervals detect these composition closed premodel structures. In the case that the lattice in question is a finite total order, this natural order retrieves the Kreweras lattice of noncrossing partitions as a refinement of the Tamari lattice, and model structures can be identified with stacked triangulations of a particular shape.Comment: 28 pages, 8 figures; comments welcome

Lifting N∞N_\infty operads from conjugacy data

We isolate a class of groups -- called lossless groups -- for which homotopy classes of $G$-$N_\infty$ operads are in bijection with certain restricted transfer systems on the poset of conjugacy classes $\operatorname{Sub}(G)/G$.Comment: v2: updates in response to referee report, accepted version in Tunisian Journal of Mathematics; 24 pages, 16 figures. v1: 22 pages, 13 figures; comments welcome

CAN ATTENTIONAL PATTERNS PREDICT THE FUTURE? A NOVEL VIEW INTO WHO IS LIKELY TO EXPERIENCE CHANGE BLINDNESS

60 pagesPeople witnessing identical streams of information can experience that information very differently. This phenomenon was strikingly documented in a famous psychological experiment: one group of research participants watching a video of a crowded area failed to notice a man in a gorilla suit meander across the room, although another group described the man in the gorilla suit as the most salient aspect of the video. How do we account for such diversity in experience? My research investigates this general question via a new technique: the dwell-time paradigm, in which viewers advance at their own pace through slideshows depicting dynamic events while the time they spend dwelling on each image is measured. We hypothesize that patterns of dwelling across time will clarify which aspects of events viewers are prioritizing in their processing, and thus we will be able to predict – well in advance -- who will subsequently report salient features of interest. Following the completion of two different studies, analysis of the results of this research indicate that dwell-time patterns do in fact provide predictive information about the probability a viewer will be subject to change blindness. This finding has wide reaching implications. Specifically, it will be possible to utilize dwell-time patterns across a range of situations where monitoring the focus and adequacy of people’s attention is crucial. For example, applications could include a) refinements to diagnosis in those with attentional impairments, and b) the creation of systems that alert people when their attentional patterns have become suboptimal for an essential task, such as drivers, train operators, and pilots

Experimental Real-time Heuristic Search Results in a Video Game

In real-time domains such as video games, a planning algorithm has a strictly bounded time before it must return the next action for the agent to execute. We introduce a realistic video game benchmark domain that is useful for evaluating real-time heuristic search algorithms. Unlike previous benchmarks such as grid pathfinding and the sliding tile puzzle, this new domain includes dynamics and induces a directed graph. Using both the previous and new domains, we investigate several enhancements to a leading real-time search algorithm, LSS-LRTA*. We show experimentally that 1) it is not difficult to outperform A * when optimizing goal achievement time, 2) it is better to plan after each action than to commit to multiple actions or to use a dynamically sized lookahead, 3) A*-based lookahead can cause undesirable actions to be selected, and 4) on-line de-biasing of the heuristic can lead to improved performance. We hope that this new domain and results will stimulate further research on applying real-time search to dynamic real-time domains

Team Sunflower - Solar Tracker Team 2

Our design problem was to create a solar radiation tracking device. The primary goal of this device was to keep a solar panel perpendicular to the solar radiation with 95% efficiency throughout the day. The tracker had to be able to account for the sun’s seasonal angle in St. Louis, and the design would be even better if it could account for the sun’s seasonal angle at any latitude. Another important aspect of the solar tracker design was that it must be able to reset itself each day for the sunrise without human input. Other aspects to consider were weatherproofing in order to keep the device safe from the elements throughout the year as well as the ability for the device to be independent of the power grid as the entire premise of a solar panel is to create usable energy rather than consume energy