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11 – 20 of over 8000Khurrum Mahmood and Norilmi Amilia Ismail
This paper aims to optimize the mass of a tethered aerostat to achieve optimum hull volume, and fins to generate aerodynamic lift to reduce the blow-by.
Abstract
Purpose
This paper aims to optimize the mass of a tethered aerostat to achieve optimum hull volume, and fins to generate aerodynamic lift to reduce the blow-by.
Design/methodology/approach
The design code of aerostat involving structure, aerostatics, aerodynamics and stability has been developed using MATLAB®. The design code is used to obtain the baseline configuration for a tactical aerostat mission by using the statistical values of the hull fineness ratio and the fin parameters of in-service aerostats. The effect of the design variables that include the hull fineness ratio, fin area and fin position on the aerostat mass and blow-by is determined through sensitivity analysis. The aerostat is optimized with an objective function of minimization of mass for the bounded values of design variables and taking blow-by limit as a constraint.
Findings
This study reveals that the simultaneous optimization of the aerostat hull fineness ratio, fin area and fin position results in an improvement in the design. The aerostat design with optimum values of these parameters helps in a reduction in its size and mass without compromising the blow-by limits.
Research limitations/implications
This study has been conducted by keeping the hull shape constant by selecting standard National Physics Laboratory envelope shape. The aerodynamic model used in the design code is based on empirical relationships that can be improved in future studies that can use high fidelity aerodynamic models using CFD based surrogate models.
Originality/value
The previous studies on optimization of aerostats are limited to hull envelope shape only, whereas this paper presents the optimization of the hull and fin together. The optimized configuration obtained has a reduced mass and can operate within the specified blow-by limits.
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The service sector is a major segment of the economy and contributes to the gross national product in a significant manner. It complements the manufacturing sector as…
Abstract
The service sector is a major segment of the economy and contributes to the gross national product in a significant manner. It complements the manufacturing sector as organizations become global in nature. Sources of raw material may be quite dispersed from the manufacturing site. Further, not all manufacturing may take place in one particular location. Based on the availability of expertise and the required operations to produce the product, components, subassemblies, or assemblies could be produced in different geographical locations. This creates the necessity to transport raw material, components, or assemblies in a timely manner from one location to another based on the needs of the supply chain. All customers prefer not only an efficient delivery system but also one that is damage-free. In this chapter, we consider a model whereby service organizations offer a contract for damage protection based on product value. The objective is to determine the premium to be charged by the service organization so as to at least break even or accomplish a desired profit margin.
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Nancy Molfenter and Cheryl Hanley-Maxwell
This chapter provides a framework for ethical decision making related to inclusive educational opportunities for secondary students with intellectual and developmental…
Abstract
This chapter provides a framework for ethical decision making related to inclusive educational opportunities for secondary students with intellectual and developmental disabilities (I/DD) based on policies and practices in the United States. Relevant research findings are utilized to explore ethical principles involved in educational decision making for secondary students with I/DD, with discussions on how these are intertwined with U.S. policy. I/DD and inclusion, as described in the research literature and U.S. policy, are defined and the current status of inclusive practices are described. Next, an exploration of the rationale, as supported by empirical evidence, for educating students at the secondary level with I/DD, primarily with their peers who do not have identified disabilities, is shared along with the counter-narrative. Connections of inclusion to post-school outcomes and the lived educational experiences of students with and without disabilities and educators are considered, including ethical dilemmas and conflicts. Finally, factors influencing the application of inclusionary practices are provided.
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Bob Algozzine, Kelly Anderson and Cynthia Baughan
Educating students with disabilities in the same classrooms and instructional environments as their natural neighbors and peers (i.e., inclusion) is a promise of significant…
Abstract
Educating students with disabilities in the same classrooms and instructional environments as their natural neighbors and peers (i.e., inclusion) is a promise of significant substance and value for many special educators. When federal legislation mandated that students with disabilities receive a free and appropriate education in least restrictive environments, at least in principle, the schoolhouse doors were opened for all students. In this chapter, we provide a brief historical review of efforts to educate students with disabilities in inclusive environments and provide direction for what we believe are important practices for creating high-quality inclusive learning environments.
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Michael Tracey, Richard W. Fite and Mathias J. Sutton
The goal of this exploratory study is to establish an explanatory model and corresponding instrument to help further understand, and conduct research in the area of supply chain…
Abstract
The goal of this exploratory study is to establish an explanatory model and corresponding instrument to help further understand, and conduct research in the area of supply chain management (SCM). Constructs pertaining to SCM assimilation, SCM outcomes, and overall firm performance are operationally defined in terms of their dimensions and items. The business literature is utilized to help define the constructs and to generate potential measurement items. The scales are then purified and a preliminary test for predictive validity is performed.
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The service industry is a major component of the economy. Raw material, components, assemblies, and finished products are shipped between suppliers, manufacturers, distributors…
Abstract
The service industry is a major component of the economy. Raw material, components, assemblies, and finished products are shipped between suppliers, manufacturers, distributors, and retailers. Accordingly, timely receipt of shipped goods is crucial in maintaining the efficiency and effectiveness of such service processes. A service provider offers an incentive to the customer by specifying a competitive target time for delivery of goods. Further, if the delivery time is deviant from the target value, the provider offers to reimburse the customer for an amount that is proportional to the value of the goods and the degree of deviation from the target value. The service provider may set the price to be charged as a function of product value. This price is in addition to the operational costs of logistics that are not considered in the formulated model. For protection against deviation from target due dates, the service provider agrees to reimburse the customer. The reimbursement could be based on an asymmetric loss function influenced by the degree of deviation from the target due date as well as product value. The penalties could be different for early and late deliveries since the customer may experience different impact and consequences accordingly. The chapter develops a model to determine the amount (price) that the provider should add to the cost estimate of the delivery contract for protection against delivery deviations. Such a cost estimate will include the operational costs (fixed and variable) of the shipment, to which an amount is added to cover the expected payout to customers when the delivery time deviates from the target value. The optimal price should be such that the expected revenue will at least exceed the expected payout.
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Herbert Kotzab, Christoph Teller, David B. Grant and Leigh Sparks
The purpose of this paper is to develop a conceptual model that includes drivers of supply chain management (SCM) adoption and execution identified in the literature, provide a…
Abstract
Purpose
The purpose of this paper is to develop a conceptual model that includes drivers of supply chain management (SCM) adoption and execution identified in the literature, provide a set of measurement scales that operationalise constructs within this model, empirically verify a hierarchical order of antecedents that affects the adoption and execution of SCM, and assist management by providing a focus on those SCM conditions and processes that need to be prioritised to increase successful SCM adoption and execution.
Design/methodology/approach
The conceptual model is tested empirically through a survey of 174 senior supply chain managers representing the biggest organisations within a central European country.
Findings
Using structural equation modelling the hypothesised hierarchical order of three proposed antecedents is verified: “internal SCM conditions”, that affect “joint or external SCM conditions”, which in turn influence collaborative “SCM‐related processes”. Firms that adopt these steps should enjoy a rigorous and appropriate road to the full execution of SCM.
Research limitations/implications
The survey results reflect the views of large organisations in a country‐specific supply chain setting.
Practical implications
The findings provide a hierarchical focus for financial, personnel and management initiatives to increase integration within a supply chain and improve competitiveness.
Originality/value
The major contribution of this paper is that it provides empirical proof of the antecedents that affect the adoption and execution of SCM.
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Soo-Young Hong, Julia Torquati and Victoria J. Molfese
The importance of early and developmentally appropriate science education is increasingly recognized. Consequently, creation of common guidelines and standards in early childhood…
Abstract
The importance of early and developmentally appropriate science education is increasingly recognized. Consequently, creation of common guidelines and standards in early childhood science education has begun (National Research Council (NRC), 2012), and researchers, practitioners, and policy makers have shown great interest in aligning professional development with the new guidelines and standards. There are some important issues that need to be addressed in order to successfully implement guidelines and make progress toward accomplishing standards. Early childhood teachers have expressed a lack of confidence in teaching science and nature (Torquati, Cutler, Gilkerson, & Sarver, in press) and have limited science and pedagogical content knowledge (PCK) (Appleton, 2008). These are critical issues because teachers’ subject-matter knowledge is a robust predictor of student learning outcomes (Enfield & Rogers, 2009; Kennedy, 1998; Wilson, Floden, & Ferrini-Mundy, 2002) and is seen as a critical step toward improving K-12 student achievement (National Commission on Mathematics and Science Teaching for the 21st Century (NCMST), 2000; NRC, 2000). We argue that the same is true of preschool teachers.
This chapter discusses: (a) theories and practices in early childhood science education (i.e., preschool through 3rd grade) in relation to teaching for conceptual change, (b) research on methods of professional development in early childhood science education, and (c) innovative approaches to integrating scientific practices, crosscutting concepts, and disciplinary core ideas with early childhood professional development.
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In the last chapter, I introduced the reader to the concept of empirically supported treatments and some of the research methods of providing evidence for the effectiveness of…
Abstract
In the last chapter, I introduced the reader to the concept of empirically supported treatments and some of the research methods of providing evidence for the effectiveness of these interventions. Unfortunately, the field seems to place much importance on the techniques and methods used by the practitioner, when the reality is that there are a vast amount of components and variables that contribute to change in effective psychotherapy. In this chapter, I move beyond the idea of the treatment method and explore the idea of evidence based practice (EBP) in its entirety. The reader will be provided with a description of EBP as a tripartite model. While it is beyond the current chapter to delve in depth into each aspect of EBP, the chapter does act as an excellent introduction providing the practitioner with key learnings to build on.
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Swee Siong Kuik, Sev Verl Nagalingam and Yousef Amer
Owing to the manufacturing trend of stringent product disposal regulations, a new business scenario, which requires an alternative disposal option on consumer products and further…
Abstract
Purpose
Owing to the manufacturing trend of stringent product disposal regulations, a new business scenario, which requires an alternative disposal option on consumer products and further product recovery operations, is increasingly important for promoting sustainable supply chain performance. The purpose of this paper is to explore the use to post‐use stage of the product lifecycle, that may have significant potential for increasing product utilisation value and reducing product disposal to landfills.
Design/methodology/approach
The paper proposes a re‐classification of the 6R (reduce, recover, redesign, reuse, recycle, remanufacturing) methodology for rectifying waste minimisation along a supply chain, to increase product utilisation at the post‐use stage.
Findings
Intensive study of 6R considerations to improve end‐of‐life planning and strategy and extend of product lifecycle management is lacking. None of the existing supply chain frameworks clearly illustrates the aspects of 6R perspectives for the use to post‐use stage.
Research limitations/implications
The main limitation is that this study only focuses on 6R perspective for achieving waste minimisation along a supply chain. There is a need to explore various practical issues of the implementation, including the establishment of specific performance metrics for various manufacturing industries to assess organisational performance.
Practical implications
This proposed sustainable supply chain for collaborative manufacturing may provide a very useful source of what needs to be implemented and achieved to meet the requirements of sustainability, which is the current and future trend of manufacturing.
Originality/value
This paper provides some of the insights into holistic aspects of 6R perspective to increase product utilisation value between use and post‐use stages.
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