62 research outputs found
Simulation Fidelity Theory and Practice
No full textSimulation fidelity is an intrinsic element of any simulation system, one that all its developers and users have to deal with one way or the other. It is commonly recognized by the modeling and simulation community that simulation fidelity is an essential vehicle in properly assessing the validity and credibility of simulation results. Furthermore, fidelity is one of the main cost-drives of any model or simulation development. Rigorous assessment of fidelity is, however, one of the most difficult and hard to grasp issues within the model and simulation community. Substantial and exhaustive research endeavors in this area are very limited. Due to this, simulation fidelity still remains a hardly touched upon and rather uncultivated area. This thesis tries to fill this void by the analysis, extension and integration of existing simulation fidelity approaches into a single unified fidelity theory and practice. All this is done from a general simulation system life cycle perspective, not limited by any specific application or problem domain aspects. The foundation for this developed unified fidelity framework comprises a precise mathematical formulation for fidelity and the fundamental concepts underlying its characterization and measurement. The unified fidelity framework is completed with a fidelity management process model outlining a series of generic stages, activities and tasks, which together provide a structured but generic approach to properly integrate and apply all other unified fidelity framework elements in the simulation system development and validation process.Aerospace Engineerin
A study of pseudo-random sequences
No full textFull text is available to authenticated members of The University of Auckland only.This thesis consists of two main sections:
1. Theoretical
Chapter One provides an introduction which gives the historical background and motivation of the study of pseudo-random sequences, as well as their classifications and general properties. A Survey of existing classes of pseudo-random sequences, definitions, and their boundary conditions, is given in Chapter Two. Five important classes of pseudo-random sequences are studied in detail in Chapters Three to Six. Two classes of Barker Sequences which have been modified by the author are given in Chapter Three. The concept of the “cyclic circle” is introduced by the author to link all multi-level pseudo-random sequences, and is used to study the properties of such sequences in Chapter Four. An explanation of how M-sequences may be obtained from the difference set, and two original methods of designing M-sequence generators are described in Chapter Five. A simplified explanation by the author of the concept of projecting maximal length sequences from m-space into a binary plane to generate Planar sequences is given in Chapter Six.
2. Practical
Chapter Seven discusses the design of sequential circuits. The concept of “structural matrix”, derived by the author, is defined and its application to the analysis, synthesis and simplification of synchronous sequential circuits is given. Chapter Eight discusses the design of high speed pseudo-random sequence generators. An original method of designing high-speed M-sequence generators, as well as a general algorithm for speeding up the generation of multi-level pseudo-random sequences are given. A selection of significant applications of pseudo-random sequences is discussed in Chapter Nine. The advantages of using pseudo-random sequences over conventional methods are described
Finite difference methods for stress analysis of adhesive bonded joints; the design of a MATLAB adhesive toolbox
No full textPlaying in the light
No full textFrom the acclaimed South African novelist, a lyrical tale of self-discovery in post-apartheid cape town. Set in a beautifully rendered 1990s Cape Town, Playing in the Light revolves around Marion, a woman of Afrikaner background, who hates traveling but nonetheless runs a travel agency, and her complex relationship with Brenda, the first black woman she has ever employed. In writing as finely detailed and attuned to psychological nuance as Anita Brookner's, Wicomb depicts the life of a complicated, single woman in a changing and complicated place. Caught up in the narrow world of private interests and self-advancement, Marion eschews national politics until the exposures of the Truth and Reconciliation Commission lead to the discovery of a skeleton in the family cupboard. While her aging father is unable and unwilling to supply the truth, Marion's young employee becomes implicated in the piecing together of Marion's past, leading to a defining transformation and widening of Marion's world. In this impeccably wrought new work, the acclaimed author of You Can't Get Lost in Cape Town provides wisdom and insight about the new South Africa and about people everywhere
An explanation of happiness with secure attachment, basic psychological needs and hope: The case of Turkish university students
No full textIn this study we aimed to investigate the role of hope, secure attachment with the parents, and satisfaction levels of the basic psychological needs (autonomy, competence and relatedness) of university students in predicting their happiness levels. A total of 558 university students were recruited and 70% of them were female and 30% of them were male. Ages of the participants ranged from 18 to 29. The data were collected in classroom settings using personal information form, the Oxford Happiness Scale, the Attachment with the Parents Scale, the Basic Psychological Needs Scale, and the Dispositional Hope Scale. Results indicated that that the satisfaction levels of the competence needs were the most powerful predictor of happiness among university students. The satisfaction levels of autonomy, relatedness needs, and a secure attachment to the father, along with hope contributed little to the explanation of happiness; whereas, a secure attachment to the mother was not a predictor of happiness of the university students. The findings were discussed within the framework of the developmental characteristics of university students and the characteristics of collectivist societies. © 2020 The Author(s
Predicting the yield stress of 3D printing mortar based on the flowability of paste and excess paste thickness
No full textThis paper develops an empirical model to predict the static yield stress of 3D printing mortar based on the flowability of paste and excess paste thickness. The components of the mortar are divided into paste and aggregate. The relation between the yield stress of mortar and the yield stress of paste and the excess paste thickness is investigated. It is found that there is a linear relationship between the yield stress of mortar and that of paste, and the yield stress of mortar also is proportional to the reciprocal of excess paste thickness. Additionally, the yield stress of paste is related to its flowability when the rheological behavior of mortar is modified with different types and dosage of thixotropic agents. Based on the experimental data, an empirical model is built to predict the static yield stress of mortar in accordance with the flowability of paste and excess paste thickness
Na+/K+-ATpase immunoreactivity in branchial chloride cells of Oreochromis mossambicus exposed to copper
No full textContains fulltext :
14130.pdf (Publisher’s version ) (Open Access
Metallothionein response in gills of Oreochromis mossambicus exposed to copper in fresh water
No full textContains fulltext :
14197.pdf (Publisher’s version ) (Open Access
Rising Authoritarian Neoliberalism in Rural Turkey: Change and Negotiation of Women in a Gendered Agribusiness in Western Anatolia
No full textThis chapter explores the links between neoliberalism, globalised agri-food relations, and rising authoritarian practices based on the labouring practices and experiences of rural women from a feminist perspective in Turkey. Focusing on the narratives of peasant-worker women employed as waged labour in one of the large-scale, exportoriented agribusinesses in Western Anatolia, which is referred to in this paper as the Greenhouse, the chapter explores the patterns of the emerging gender labour regime that covers the paid and unpaid labour of women at the Greenhouse, at home, and in the fields. It discusses the emergence of the Greenhouse as a large-scale factory-like enterprise with all-year production and how it became possible under AKP rule within the framework of authoritarian neoliberalism and the resistance strategies of women. Prioritising women’s agency and experience as a source of knowledge via feminist methodology, the chapter sheds light on the limitations and potential for resistance and change in the lives of the women with reference to their own work and life strategies. © The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2022
Emission Characteristic Analysis of Urban Domestic Pollution Sources in China
No full textAbstractEver since china entered the period of rapid urbanization in the late eighties last century, the urban domestic pollution sources have become the major source of most urban water pollution. However, the current literature both at home and aboard rarely involves the analysis of pollution source emission characteristics. In this paper, the author chooses the consumption level and the disposable income of urban residents as the emission characteristic indicators of urban domestic pollution sources, building the statistical model of urban domestic pollution sources. Based on this, the author divided china into 5 regions and 25 categories, investigating the reasons of the urban life emission characteristic differences between these regions, providing decision support for more actively controlling the pollution and guiding the economical and social development
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