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1 – 10 of over 242000Petar D. Mirosavljević, Đorđe I. Pantović and Radomir M. Mijailović
The purpose of this paper is to develop a new tool for aircraft performance analysis and optimization.
Abstract
Purpose
The purpose of this paper is to develop a new tool for aircraft performance analysis and optimization.
Design/methodology/approach
In this paper, the methodology of converting nomogram curves into mathematical functions is presented. Aircraft performance nomograms represent graphical interpretation of influence of several variables on performance such as environmental conditions, runway conditions and aircraft mass. The aircraft performance nomograms are converted in mathematical functions that describe several independent variables’ influence on aircraft performance parameters. To achieve greater accuracy in calculation of aircraft performance parameters, it is necessary to determine mathematical functions presented by dependent variable variations with several independent variables. The method of determining mathematical functions is illustrated on Fokker 100 landing gear extended net climb gradient determination graph.
Findings
To evaluate model, it was necessary to determine net climb gradient both graphically and analytically using model and compare the results. After solving both analytically and graphically, it was concluded that results are a match. During model evaluation, it was observed that model has a lot of advantages such as it has great precision of calculation, requires less time to calculate results and has minimum error possibility.
Practical implications
Final result of digitalization of aircraft performance nomograms is software production. The usage of this software can reduce flight planning and aircraft exploitation costs in several different manners. Airliners can produce such a software for those types of aircraft where there is no software provided from aircraft manufacturer.
Originality/value
Digitalization of aircraft performance nomogram has never been analyzed before, although there is a possibility of this particular methodology implementation in a practical manner in aviation industry.
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Alexandros Galanis and David G Woodward
In the conduct of an organisation’s myriad activities, obtaining value for money is a crucial consideration, and over the years this has increasingly encouraged businesses to…
Abstract
In the conduct of an organisation’s myriad activities, obtaining value for money is a crucial consideration, and over the years this has increasingly encouraged businesses to examine both the effectiveness and efficiency of outsourcing specific business functions. Historically, concern was with more‐or‐less peripheral activities where the cost advantage of outsourcing was readily ascertainable. But more recently attention has increasingly been directed towards more fundamental business activities where consideration of mere cost is supplanted by aspects of quality, and the recognition that greater external quality of provision might well override mere considerations of economy.
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This book is a policy proposal aimed at the democratic left. It is concerned with gradual but radical reform of the socio‐economic system. An integrated policy of industrial and…
Abstract
This book is a policy proposal aimed at the democratic left. It is concerned with gradual but radical reform of the socio‐economic system. An integrated policy of industrial and economic democracy, which centres around the establishment of a new sector of employee‐controlled enterprises, is presented. The proposal would retain the mix‐ed economy, but transform it into a much better “mixture”, with increased employee‐power in all sectors. While there is much of enduring value in our liberal western way of life, gross inequalities of wealth and power persist in our society.
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Valery J. Frants, Jacob Shapiro and Vladimir G. Voiskunskii
An Act to make further provision for securing the health, safety and welfare of persons at work, for protecting others against risks to health or safety in connection with the…
Abstract
An Act to make further provision for securing the health, safety and welfare of persons at work, for protecting others against risks to health or safety in connection with the activities of persons at work, for controlling the keeping and use and preventing the unlawful acquisition, possession and use of dangerous substances, and for controlling certain emissions into the atmosphere; to make further provision with respect to the employment medical advisory service; to amend the law relating to building regulations, and the Building (Scotland) Act 1959; and for connected purposes. [31st July 1974]
Thomas N. Garavan, Bridie Barnicle and Noreen Heraty
Reviews some of the literature on power and influence as it relatesto the training and development function. Highlights a number ofdifficulties that confront the training and…
Abstract
Reviews some of the literature on power and influence as it relates to the training and development function. Highlights a number of difficulties that confront the training and development function in using power and influence successfully in organizations. Empirical evidence is presented on how Irish training specialists perceive the power of the training and development function. Concludes that a number of strategies are outlined for use by the training and development function in order to develop power and use it effectively.
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Learning is the main‐stream function in the school. Just as the function of teaching is to facilitate learning, the function of administration is to facilitate teaching. Good…
Abstract
Learning is the main‐stream function in the school. Just as the function of teaching is to facilitate learning, the function of administration is to facilitate teaching. Good administration is concerned with stimulating and motivating good teaching. The term “supervision” is commonly used to denote administration of instruction and instructional personnel. A major facet of supervision is that of teacher evaluation—a complex and difficult process in which the establishment of criteria of effectiveness, the development of valid, reliable instruments and techniques and the assessment of cause and effect is invariably influenced by personal perceptions, biases and interpretations. Research on teacher effectiveness, which includes thousands of studies, has produced few, if any, facts to guide us. It is doubtful that visits by an inspector have had much effect in improving teaching. Perhaps too much of our time and resources arc being applied ineffectually. If formal evaluation or rating of teachers must take place it is best performed by supervisors with skills in particular areas. Certainly we should not thrust the task of teacher evaluation on the principal, for whom the task of organizing and overseeing the operation and development of a school is extensive enough to take all his time, ability and effort.
Linda G. Bills and Linda W. Helgerson
The user interface, in broad terms, is the medium through which the user and the information come together. The types of searches a public access catalog (PAC) can perform are…
Abstract
The user interface, in broad terms, is the medium through which the user and the information come together. The types of searches a public access catalog (PAC) can perform are defined by the indexing strategy and retrieval software. The way the user's interest is communicated to the retrieval software and the way the results are communicated to the user is, by a more narrow definition, the interface software. Both the kinds of searches that can be performed by a variety of CD‐ROM PACs and how their workstations are used to accomplish the searches are considered.
Emir Malikov, Shunan Zhao and Jingfang Zhang
There is growing empirical evidence that firm heterogeneity is technologically non-neutral. This chapter extends the Gandhi, Navarro, and Rivers (2020) proxy variable framework…
Abstract
There is growing empirical evidence that firm heterogeneity is technologically non-neutral. This chapter extends the Gandhi, Navarro, and Rivers (2020) proxy variable framework for structurally identifying production functions to a more general case when latent firm productivity is multi-dimensional, with both factor-neutral and (biased) factor-augmenting components. Unlike alternative methodologies, the proposed model can be identified under weaker data requirements, notably, without relying on the typically unavailable cross-sectional variation in input prices for instrumentation. When markets are perfectly competitive, point identification is achieved by leveraging the information contained in static optimality conditions, effectively adopting a system-of-equations approach. It is also shown how one can partially identify the non-neutral production technology in the traditional proxy variable framework when firms have market power.
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Overview All organisations are, in one sense or another, involved in operations; an activity implying transformation or transfer. The major portion of the body of knowledge…
Abstract
Overview All organisations are, in one sense or another, involved in operations; an activity implying transformation or transfer. The major portion of the body of knowledge concerning operations relates to production in manufacturing industry but, increasingly, similar problems are to be found confronting managers in service industry. It is only in the last decade or so that new technology, involving, in particular, the computer, has encouraged an integrated view to be taken of the total business. This has led to greater recognition being given to the strategic potential of the operations function. In order to provide greater insight into operations a number of classifications have been proposed. One of these, which places operations into categories termed factory, job shop, mass service and professional service, is examined. The elements of operations management are introduced under the headings of product, plant, process, procedures and people.