958 research outputs found

    Development of power on Little Piney River

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    Little Piney River has its source in the southern part of Phelps County, Missouri. Its general direction is north until its junction with Beaver Creek. Then it flows nearly due west and empties into the Gasconade River near Arlington, Mo. It drains an area of approximately two hundred square miles. The slopes of its drainage area being very steep, it is subject to large and sudden rises. As it is largely a spring fed stream its minimum flow is not far below its normal stage. The stream abounds in rapids with from a few inches to a foot or more drop in each one. For many years this stream has been used to furnish power for grist mills and the like, the method in such cases being to erect a small dam at such a point as was convenient and carrying the water down-stream to some point where the drop was sufficient for the purpose --page 1

    Student and Facilitator Engagement to Develop Leadership Competencies in a Project-based Learning Environment

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    The purpose of this article is to examine how graduate educational leadership students engaged and developed competencies in a project-based learning environment. The project-based curriculum was designed to facilitate the development of team leadership skills as doctoral students applied the course concepts learned throughout their two-year cohort experience. The facilitator introduced the project-based group endeavor to the doctoral students in their first semester of course work. Periodically, the facilitator would meet with the students to acquire feedback on their progress. The group endeavor concluded in the last semester of coursework with students presenting their results before the doctoral faculty and other members of the academic community

    Special Delivery: Programming with Mailbox Types (Extended Version)

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    The asynchronous and unidirectional communication model supported by mailboxes is a key reason for the success of actor languages like Erlang and Elixir for implementing reliable and scalable distributed systems. While many actors may send messages to some actor, only the actor may (selectively) receive from its mailbox. Although actors eliminate many of the issues stemming from shared memory concurrency, they remain vulnerable to communication errors such as protocol violations and deadlocks. Mailbox types are a novel behavioural type system for mailboxes first introduced for a process calculus by de'Liguoro and Padovani in 2018, which capture the contents of a mailbox as a commutative regular expression. Due to aliasing and nested evaluation contexts, moving from a process calculus to a programming language is challenging. This paper presents Pat, the first programming language design incorporating mailbox types, and describes an algorithmic type system. We make essential use of quasi-linear typing to tame some of the complexity introduced by aliasing. Our algorithmic type system is necessarily co-contextual, achieved through a novel use of backwards bidirectional typing, and we prove it sound and complete with respect to our declarative type system. We implement a prototype type checker, and use it to demonstrate the expressiveness of Pat on a factory automation case study and a series of examples from the Savina actor benchmark suite.Comment: Extended version of paper accepted to ICFP'2

    The later work of Jean Ricardou

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    This thesis examines the career of Jean Ricardou after 1982. The introduction indicates the obscurity in which he Ricardou’s reputation languishes currently. Chapter 1 sketches Ricardou’s career until 1982 and examines the denunciations of him by Alain Robbe-Grillet, Nathalie Sarraute and Claude Simon pronounced in that year, and how critics have subsequently portrayed him. Chapter 2 describes Ricardou’s involvement in writing workshops in France and the role he played in developing them and exercises to be used in such workshops, in particular the Bestiaire. Chapter 3 introduces the new discipline of textique which aims to provide a theoretical description of all phenomena associated with writing starting from the simplest mark. Chapter 4 suggests that textique, because of its militant materialism, might be susceptible to ultra-left tendencies. Chapters 5 and 6 examine textique as literary criticism, the former with reference to Une Maladie chronique, the latter to sonnets by Heredia and MallarmĂ©. Chapter 7 examines Ricardou’s later fiction, the concept of the “mixte” as developed in Le thĂ©Ăątre des mĂ©tamorphoses and Hommage Ă  Jean Paulhan and in these texts and La cathĂ©drale de Sens, it explores the commonly held opinion that Ricardou’s work is “anti-referential”. The conclusion looks at factors that could influence the expansion of textique’s influence, its difficulty or reluctance to find an audience and its relation to those that Ricardou considers to be the great thinkers of the modern era, MallarmĂ©, Freud and Marx.EThOS - Electronic Theses Online ServiceGBUnited Kingdo

    The development of two field‐ready reverse transcription loop‐mediated isothermal amplification assays for the rapid detection of Seneca Valley virus 1

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    Seneca Valley virus 1 (SVV‐1) has been associated with vesicular disease in swine, with clinical signs indistinguishable from those of other notifiable vesicular diseases such as foot‐and‐mouth disease. Rapid and accurate detection of SVV‐1 is central to confirm the disease causing agent, and to initiate the implementation of control processes. The development of rapid, cost‐effective diagnostic assays that can be used at the point of sample collection has been identified as a gap in preparedness for the control of SVV‐1. This study describes the development and bench validation of two reverse transcription loop‐mediated amplification (RT‐LAMP) assays targeting the 5â€Č‐untranslated region (5â€Č‐UTR) and the VP3‐1 region for the detection of SVV‐1 that may be performed at the point of sample collection. Both assays were able to demonstrate amplification of all neat samples diluted 1/100 in negative pig epithelium tissue suspension within 8 min, when RNA was extracted prior to the RT‐LAMP assay, and no amplification was observed for the other viruses tested. Simple sample preparation methods using lyophilized reagents were investigated, to negate the requirement for RNA extraction. Only a small delay in the time to amplification was observed for these lyophilized reagents, with a time from sample receipt to amplification achieved within 12 min. Although diagnostic validation is recommended, these RT‐LAMP assays are highly sensitive and specific, with the potential to be a useful tool in the rapid diagnosis of SVV‐1 in the field

    Quantum picturalism for topological cluster-state computing

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    Topological quantum computing is a way of allowing precise quantum computations to run on noisy and imperfect hardware. One implementation uses surface codes created by forming defects in a highly-entangled cluster state. Such a method of computing is a leading candidate for large-scale quantum computing. However, there has been a lack of sufficiently powerful high-level languages to describe computing in this form without resorting to single-qubit operations, which quickly become prohibitively complex as the system size increases. In this paper we apply the category-theoretic work of Abramsky and Coecke to the topological cluster-state model of quantum computing to give a high-level graphical language that enables direct translation between quantum processes and physical patterns of measurement in a computer - a "compiler language". We give the equivalence between the graphical and topological information flows, and show the applicable rewrite algebra for this computing model. We show that this gives us a native graphical language for the design and analysis of topological quantum algorithms, and finish by discussing the possibilities for automating this process on a large scale.Comment: 18 pages, 21 figures. Published in New J. Phys. special issue on topological quantum computin

    Effectiveness of continuous glucose monitoring in pregnant women with diabetes: randomised clinical trial

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    Objective To evaluate the effectiveness of continuous glucose monitoring during pregnancy on maternal glycaemic control, infant birth weight, and risk of macrosomia in women with type 1 and type 2 diabetes

    A decrease in photoperiod shortly after first feeding influences the development of Atlantic salmon (Salmo salar)

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    Four groups of Atlantic salmon fry (n=2000) were exposed to continuous light (LD24:0) from first feeding on 18th April 2001, after which they were exposed to either an 8 or 12 week period of short days (LD10:14) starting on either the 21st May or the 18th June. Each group was then returned to LD24:0 until the conclusion of the experiment the following March. In August 200 fish per treatment were individually PIT tagged. All groups were maintained under an ambient temperature regime. The highest levels of sexual maturation in 0+ male parr were recorded in the 12 week/May group (>11% of the entire male and female population), with the lowest levels (6%) in the 8 week/May and 8 week/June groups (
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