35,880 research outputs found

    Hybrid computer technique yields random signal probability distributions

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    Hybrid computer determines the probability distributions of instantaneous and peak amplitudes of random signals. This combined digital and analog computer system reduces the errors and delays of manual data analysis

    The History of the Name \u3ci\u3ePanorpa\u3c/i\u3e Linnaeus (Mecoptera)

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    (excerpt) Attempts to understand the origin of Linnaeus\u27 name for the scorpionfly Panorpa have come to nought for a very good reason. The word does not mean anything at all. It is an interesting example of the futility of looking up names in a Latin or Greek dictionary to find their meaning when the history of the word is at all complicated. The word Panorpa is born of a series of taxonomic, philological, grammatical, and (perhaps) typographical errors which can be sorted out by a survey of the pre-Linnaean history of the word and of the insect. In order to keep the end in view throughout the argument that follows, the reader may be gratified to anticipate the conclusion that Panorpa comes ultimately from the Greek word parnops (genitive parnopos) meaning \u27locust.\u2

    The Etymology of the Names Pipunculus Latreille and Dorilas Meigen (Diptera, Pipunculidae)

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    (excerpt) There are at least two good reasons for understanding the etymology of scientific names. The first is to satisfy the natural curiosity about the history of the terms we use, and to gain an entree into the mind of the man ~.ho fist used a name. A study of Fabricius\u27 names, for instance, reveals that he had a playful sense of humor. Secondly, such understanding contributes to the stability of names, and helps to prevent irresponsible emendation of spelling, gender, or morphology such as burden the synonomies of most groups. It is happil

    Analysis of Selective Laser Sintering print parameter modelling methodologies for energy input minimisation : a thesis presented in partial fulfilment of the requirements for the degree of Master of Engineering in Mechatronics at Massey University, Albany, New Zealand

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    Additive Manufacturing (AM) is the name given to a series of processes used to create solids, layer upon layer, from 3 Dimensional (3D) models. As AM experiences rapid growth there exists an opportunity for Selective Laser Sintering (SLS) to expand into markets it has not previously accommodated. One of the ways SLS can accomplish this is by expanding the range of materials that can be processed into useful products, as currently only a small number of materials are available when compared to other AM technologies. One of the biggest barriers to the adoption of materials is the danger inherent to high-energy processes such as SLS. The aim of this research was to identify opportunities to improve current methods for modelling the relationship between material specifications, and printing parameters. This was achieved by identifying existing models used to determine printing parameters for a new material, identifying weaknesses in current modelling processes, conducting experimentation to explore the validity of these weaknesses, and exploring opportunities to improve the model to address these weaknesses. The current models to determine printer parameters to achieve successful sintering include both the Sintering Window (SW) and the Energy Melt Ratio (EMR). These two models are complementary, and both are required to establish all common print parameters. They include both thermal and physical powder properties, but do not include any optical properties. This is significant because the nature of the SLS printing process relies on concentrated delivery of laser energy to achieve successful sintering. Analysis of two similar polyamide powders, one black and one white, identified that the two powders were similar thermally and physically, which meant the models predicted that they should both sinter successfully utilizing the same set of print parameters. Results of the experimental trials showed that no trials involving the white powder sintered successfully, and trials involving the black powder suffered from issues with either insufficient energy to successfully remove parts without damage, or excessive energy causing excess powder to bond to the part. Further experimentation was carried out to investigate the differences in optical properties using Fourier Transform Infrared Spectroscopy (FTIR) and Spectrofluorophotometry. FTIR revealed that there was a difference in absorption as a material property, indicating that differences in laser energy absorption could explain the results seen in the trials. Spectrofluorophotometry revealed minimal differences in fluorescence of the powders, suggesting it an unlikely source of energy loss. Future work is recommended to research a standardised form of testing setup that can be used to categorize the reflectance of a material, as current work relies on proprietary experimental setups. Finding methods of classifying the laser absorption that is easily available to operators would enable refinement of the EMR equation to reflect the energy losses during printing, and remove another barrier for adoption of new materials

    Jane Eyre and Education

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    Charlotte Brontë created the first female Bildungsroman in the English language when she wrote Jane Eyre in the mid-nineteenth century. Brontë’s novel explores the development of a young girl through her educational experiences. The main character, Jane Eyre, receives a formal education as a young orphan and eventually becomes both a teacher and a governess. Jane’s life never strays far from formal education, regardless of whether she is teaching or being taught. In each of Jane’s experiences, she learns invaluable lessons, both in and out of the classroom environment. Jane excels in the sphere of formal education, which allows her to become a graceful and accomplished woman. However Jane learns the most important lessons of her life during crises. The moral and spiritual lessons Jane acquires in times of difficulty are the most important educational experiences she receives, and they allow her to progress from a lonely orphan to a happily married woman

    Scottish contributions to rotary wing flight

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    This paper charts the history of rotorcraft development in Scotland. Beginning with the early efforts of Mumford to achieve rotor-borne flight, through the major technology advances of G and J Weir in the 30s and 40s up to present day activities. The paper shows that despite being a relatively small country, Scotland’s traditional expertise in engineering when applied to the development of rotorcraft,generated significant technological advances

    Factors that help or hinder personal recovery in people with a schizophrenia diagnosis: a different sort of 'therapeutic' relationship

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    This collaborative study grew out of the lived, learned experience of the primary inquirer and co-inquirer, a diagnosed paranoid schizophrenic. Embracing a phenomenological (Heidegger, 1927/1962) participatory action attitude (Reason & Bradbury, 2001) using research as a tool to offer a practical alternative, the study aimed to generate knowledge to empower persons with a schizophrenia diagnosis by raising conscious awareness of what either helps or hinders personal recovery. A total of eight credible exemplars with experiences synonymous with a schizophrenia diagnosis participated in open dialogical interviews. An a priori open coding framework derived from my selective, guided interrogation of the personal recovery oriented literature was applied to and iteratively integrated with the inductively driven data which emerged from the interviews. Nine organising themes emerged which converged around three interdependent global themes: Context, Meaning Making and Identity Formation, Interpersonal Relationships and Organisational Culture – Systems. Figural to this intersubjective, contested and co-created multiversal space is a different sort of therapeutic relationship built on pragmatism, authenticity and a tolerant understanding and willingness to embrace and make meaning of disconcerting subjective experiences. The study generates knowledge to challenge and de-construct the essentially contested construct of schizophrenia along with the myths, misconceptions and negative stereotypes which maintain “it”, by raising conscious awareness of and redressing the inherent power imbalance in staff-client relationships and by privileging and validating the voices of the people who own the experience. These hitherto largely unheard voices support the call for an empowering “paradigm shift in relation to the experience that these [schizophrenia] diagnoses refer to” (BPS, 2014). The originality and challenge of this approach resides with fellow mental health and allied professionals willingly embracing incongruent disconcerting worlds, surrendering the privilege of professional disciplinary power and taking “on board that there is no us and them, there are only people trying to make the best of our situation” (Understanding Psychosis and Schizophrenia, 2014, p. 113)
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