Characteristics of recycled plastics and applications for highway appurtenances

Recycling is gaining widespread support in many communities as an environmentally acceptable solution to the management of solid waste. The success of these recycling programs depends largely on the development of high-value end use for the recycled products. This research involves an experimental and analytical study on the development of high-value, high-volume end uses for recycled plastic shapes. The experimental part includes material tests to determine mechanical properties of various recycled plastics. A constitutive model is proposed and verified that can be used in characterization of recycled plastics. Bending tests of recycled plastic beams were performed to assess strength, stiffness and mode of failure. Analytical results using the proposed constitutive model are in good agreement with the experimental results. An innovative noise wall design that takes advantage of multi-layering to increase stiffness and sound effectiveness is discussed as well as other possible uses and future research needs

A relation between tensile and tear strength for design of architectural fabrics

This paper presents a model that relates tensile and tear strengths for architectural fabrics used in tension membrane structures. Extension of the model is also presented as a means to use these two material strengths in establishing an allowable size of defects in a given field of stress

A software system for large-scale structural optimization

This work is driven by recent developments in mathematical programming, the state-of-the-art of structural optimization, the spectacular performance of linear programming algorithms, and computer hardware developments which imply that applications of structural optimization might be used commonly in engineering design. Currently, there are few general purpose optimization routines available to the structural engineer and much of the work has addressed specific classes of problems. Further, there is little widespread use of the available routines, partly due to the large amount of familiarity one must have with the specific details of both the problem and the optimization method. In response, it is the intention here to prototype a software system that implements a general approach for structural optimization using the latest in mathematical programming techniques. This work develops a general system that can be used for a variety of structural optimization problems in a manner analogous to the finite element method for structural analysis. The most commonly used structural elements, truss and beam, are included as well as techniques for plate optimization. Consideration is given to the software requirements of a general purpose structural optimization system and the demands of large structural systems typically encountered in design practice. This general approach is aimed at using classical methods taken directly from the area of mathematical programming, specifically linear programming, which has seen considerable change in the last ten years. Here, sequential linear programming (SLP) techniques are shown to handle a wide variety of structural constraints including stress constraints, displacement constraints, buckling, and frequency constraints. It is the purpose of this thesis to bring the latest developments in linear programming to the field of structural optimization in the form of a general purpose, state-of-the-art structural optimization system. The model was tested for sample structures and it was shown to effect a reduction in total structure volume of up to 80%

Place-Names of Ross and Cromarty

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Precepts and Performances: Overseas Monks and the Emergence of Cosmopolitan Japan

In 733, Japan’s ninth diplomatic mission to Tang China conveyed two Japanese Buddhist monks committed to finding a Chinese master of Buddhist precepts. The prevailing explanation for the precepts master solicitation states that Japan lacked sufficient numbers of fully ordained monks to conduct ordinations using vinaya codes of conduct. While this campaign successfully resulted in precept masters going to Japan in 736 and again in 754, there were no notable changes to monastic ordinations until after the final monk arrived. It is commonly presumed that only the latter precepts master possessed sufficient charisma, training, and followers necessary to establish a vinaya tradition. However, this explanation presumes that the later reforms matched the original expedition’s intent. Moreover, this position ignores the other monks’ activities in Japan’s political, cultural, and religious affairs between 736-754. It is also not supported by period texts. In this work, I utilize textual and physical evidence to demonstrate that these overseas monks’ activities and significance were largely unrelated to monastic precepts and ordinations. Instead, they rose to prominence due to their knowledge of Buddhist texts and rituals, familiarity with neighboring countries’ Buddhist legitimation and protection systems, fluency in overseas forms of cultural capital, and embodied otherness. Their influence can be seen in their involvement in the Ministry for Monastic Affairs, promulgation of the Avataṃsaka Sutra, and the creation and worship of the Great Buddha of Nara. Through highlighting these understudied and highly diverse monks, I demonstrate that Japan’s overseas population was intrinsically involved with the country’s transformation into a transregionally-connected, Buddhist country. Moreover, I argue that the overseas monks affiliated with Daianji Temple (大安寺) provided the Japanese court with direct ties to foreign countries that not only expanded Japanese international awareness, but also helped establish the country’s understanding of its position within a broader Buddhist world

Upregulating beta-hexosaminidase activity in rodents prevents alpha-synuclein lipid associations and protects dopaminergic neurons from alpha-synuclein-mediated neurotoxicity

Sandhoff disease (SD) is a lysosomal storage disease, caused by loss of beta-hexosaminidase (HEX) activity resulting in the accumulation of ganglioside GM2. There are shared features between SD and Parkinson\u27s disease (PD). alpha-synuclein (aSYN) inclusions, the diagnostic hallmark sign of PD, are frequently found in the brain in SD patients and HEX knockout mice, and HEX activity is reduced in the substantia nigra in PD. In this study, we biochemically demonstrate that HEX deficiency in mice causes formation of high-molecular weight (HMW) aSYN and ubiquitin in the brain. As expected from HEX enzymatic function requirements, overexpression in vivo of HEXA and B combined, but not either of the subunits expressed alone, increased HEX activity as evidenced by histochemical assays. Biochemically, such HEX gene expression resulted in increased conversion of GM2 to its breakdown product GM3. In a neurodegenerative model of overexpression of aSYN in rats, increasing HEX activity by AAV6 gene transfer in the substantia nigra reduced aSYN embedding in lipid compartments and rescued dopaminergic neurons from degeneration. Overall, these data are consistent with a paradigm shift where lipid abnormalities are central to or preceding protein changes typically associated with PD

Writing in Britain and Ireland, c. 400 to c. 800

No abstract available

Creating and curating an archive: Bury St Edmunds and its Anglo-Saxon past

This contribution explores the mechanisms by which the Benedictine foundation of Bury St Edmunds sought to legitimise and preserve their spurious pre-Conquest privileges and holdings throughout the Middle Ages. The archive is extraordinary in terms of the large number of surviving registers and cartularies which contain copies of Anglo-Saxon charters, many of which are wholly or partly in Old English. The essay charts the changing use to which these ancient documents were put in response to threats to the foundation's continued enjoyment of its liberties. The focus throughout the essay is to demonstrate how pragmatic considerations at every stage affects the development of the archive and the ways in which these linguistically challenging texts were presented, re-presented, and represented during the Abbey’s history