Holography

Holography - Basic Principles and Contemporary Applications is a collection of fifteen chapters, describing the basic principles of holography and some recent innovative developments in the field. The book is divided into three sections. The first, Understanding Holography, presents the principles of hologram recording illustrated with practical examples. A comprehensive review of diffraction in volume gratings and holograms is also presented. The second section, Contemporary Holographic Applications, is concerned with advanced applications of holography including sensors, holographic gratings, white-light viewable holographic stereograms. The third section of the book Digital Holography is devoted to digital hologram coding and digital holographic microscopy

Proceedings of the Conference on Production Systems and Logistics: CPSL 2022

[no abstract available

Extraction of Arabic word roots: An Approach Based on Computational Model and Multi-Backpropagation Neural Networks

Stemming is a process of extracting the root of a given word, by stripping off the affixes attached to this word. Many attempts have been made to address the stemming of Arabic words problem. The majority of the existing Arabic stemming algorithms require a complete set of morphological rules and large vocabulary lookup tables. Furthermore, many of them give more than one potential stem or root for a given Arabic word. According to Ahmad [11], the Arabic stemming process based on the language morphological rules is still a very difficult task due to the nature of the language itself. The limitations of the current Arabic stemming methods have motivated this research in which we investigate a novel approach to extract the word roots of Arabic language named here as MUAIDI-STEMMER 2. This approach attempts to exploit numerical relations between Arabic letters, avoiding having a list of the root and pattern of each word in the language, and giving one root solution. This approach is composed of two phases. Phase I depends on a basic calculations extracted from linguistic analysis of Arabic patterns and affixes. Phase II is based on artificial neural network trained by backpropagation learning rule. In this proposed phase, we formulate the root extraction problem as a classification problem and the neural network as a classifier tool. This study demonstrates that a neural network can be effectively used to ex- tract the word roots of Arabic language The stemmer developed is tested using 46,895 Arabic word types3. Error counting accuracy evaluation was employed to evaluate the performance of the stemmer. It was successful in producing the stems of 44,107 Arabic words from the given test datasets with accuracy of 94.81%. 2.Muaidi is the author father's name. 3.Types mean distinct or unique words

The teaching of electronics in schools and further education: a case study in curriculum change.

This case study describes the development of Electronics within the curriculum in line with how both (Reid and Walker I975, Case Studies in Curriculum Change) and (Goodson I983, School Subjects and Curriculum Change) discussed changes in terms of theories of curriculum change. Alternative definitions of the term innovation are reviewed and for the purpose of this study a definition is adopted which includes syllabus change and major changes of scale and strategy. The study gives an outline of the major theories of innovation and implementation strategy. Features of centralisation and rationalisation are described insofar as these features led to current educational initiatives. An account Is given of how Electronics developed as a topic within ‘A’ level Physics, a subject within B.E.T.E.C. (previously O.N.C/T.E.C.) and as a separate G.C.E. subject. Data on examination entries In G.C.E. and C.S.E. Electronics are presented. These data are related to the- size of L.E.A.s, the type of centre, and also to explore the viability of G.C.E./G.C.S.E. provision in Electronics. Initiatives such as M.E.P., T.V.E.I., C.P.V.E., S.S.C.R. are described as they are expected to have a significant impact on the growth of Electronics. The position of Electronics within the curriculum and its educational value are discussed. Comment is made on the Systems and Components approaches to Electronics and on the importance of project work. Teacher difficulties with project work are noted and suggestions are made on the use and range of equipment available so that a suitable teaching style may be -developed

Gaywaves: Transcending Boundaries - the Rise and Demise of Britain's First Gay Radio Program

At the beginning of 1982 an array of conflicting forces were working to shape the landscape of Europe's metropolitan radio services, and to alternatively control, commodify or liberate its gay communities. This paper examines the drivers, which inspired Gaywaves, a nascent weekly gay community radio programme broadcasting to an inner London audience on pirate station Our Radio from May 1982 until March 1983

Transnationalizing Radio Research: New Approaches to an Old Medium

Transnationalizing Radio Research presents a theoretical and methodological guide for exploring radio's multiple »global ages«, from its earliest years through its recent digital transformations. It offers radio scholars theoretical tools and concrete case studies for moving beyond national research frames. It gives radio practitioners inspiration for production and archiving, and offers scholars from many disciplines new ways to incorporate radio's vital voices into work on transnational institutions, communities, histories and identities

Technology 2001: The Second National Technology Transfer Conference and Exposition, volume 1

Papers from the technical sessions of the Technology 2001 Conference and Exposition are presented. The technical sessions featured discussions of advanced manufacturing, artificial intelligence, biotechnology, computer graphics and simulation, communications, data and information management, electronics, electro-optics, environmental technology, life sciences, materials science, medical advances, robotics, software engineering, and test and measurement

Modelling sustainable ecotourism development on the Coromandel Peninsula in Aotearoa / New Zealand; a holistic systems approach based on the idea of chaos and complexity in a human-activity system

This thesis studies ecotourism in the context of sustainable tourism development. The research is based on the premise that ecotourism and sustainable development can be expressed as operational theoretical concepts and as fields of empirical inquiry. Positioned in the realm of applied qualitative research in the social sciences, the study’s leitmotiv is that sustainable ecotourism development can be represented from an integrative perspective by designing a conceptual system model. The field work consists of an empirical inquiry placed in the Coromandel Peninsula in New Zealand/Aotearoa. By employing a regional case study to test the hypotheses of the thesis, the research attains an insight in the operationalisation of ecotourism and sustainable ecotourism development. It further produces new knowledge regarding the theorisation and conceptualisation of ecotourism and sustainable tourism development. Two main goals drive the study. The first is the exploration of the ontological, epistemological and ideological matrix of a holistic and systemic research perspective. The second goal is the examination of the methodological and practical utility of conceptual system modelling as a research approach. The adopted strategy allows for causal, correlative and teleological interpretations of the spatio-temporal physical and mental phenomena encountered. With reference to critical realism the modelling process is recognised as an abstraction of ‘actual reality’ as opposed to ‘real reality’. Critical realism as an ontology accounts for the different ‘situated knowledges’ and worldviews that are present in the Coromandel Peninsula. The model itself reflects the researcher’s perception of an ‘empirical reality’, which is depicted at three resolution levels. Progressively coupling the different scales, the model design focuses on: (1) The configuration and behavioural patterns of the system as a whole; (2) the attributes of nested subsystems and their influences on each other as well as on the whole system; (3) the properties of individual system constituents, the processes and relationships linking these elements, and their effects on subsets of the system as well as on the system as a whole. Structural and process analyses, as well as an aetiological account of the system’s variables, do justice to the experienced complexity. At each resolution level the research outcome entails two simultaneously developed models. Both show the characteristics of open, complex and adaptive human-activity systems. While the first model reflects the status quo of sustainable ecotourism development in the Coromandel Peninsula, the second one represents an idealised archetype that can be used as a grid for further improvements. Neither model offers a fait accompli. Having identified ecotourism and sustainable tourism development as subjective and dynamic problem areas, answers exist within a continuum of differential interpretations, satisfying changing interests, needs and expectations. Solutions are thus of a suggestive and tentative nature. On a theoretical level, the study utilises ideas derived from ‘general system theory’ and the ‘chaoplexity paradigm’. Conceptually, it expands the philosophical notion of methodological holism into a pluralistic approach. Methodological triangulation is employed to compensate for the anticipated shortcomings of individual methods. In a pragmatic sense ecotourism and sustainable tourism development are viewed as anthropogenic phenomena that emerge at the interface between humans and the natural environment. Human agency is interpreted as the fulcrum of the system’s evolution, which operates in both the mental and physical dimension. Assuming that humans possess ‘free will’, and that rational and irrational as well as emotive and intuitive behaviour are inherent faculties of our nature, the system’s dynamics can not be sufficiently described via linear causalities. Non-linear relations, and a complex combination of multivariate and contingent causation, are interpreted predominantly as a result of human encounter and interaction. Answers to what should be ‘right’ and ‘wrong’ in ecotourism practice are based on the adoption of a pluralistic moral stance. This approach allows for competitive as well as cooperative elements as inherent human character traits that drive decision-making processes. Based on the findings, the thesis concludes with a flexible template of systemic indices that can evaluate the environmental performance and development of ecotourism. It is argued that utilising the suggested set of complex indicators in conjunction bears the potential to enhance sustainable ecotourism development. The template’s adaptability to specific situational contexts is viewed as a prerequisite to cater for changing demands and expectations of individuals, local communities and regions