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Already in service or under development are over a dozen or more aircraft and missiles in the general Mach 2 to 5 bracket using air breathing propulsion systems. Other major high speed projects are also at the study stage. While the subsonic combustion ramjet can span this field and beyond, the turbine engine has to transmute through a number of basic configurations to maintain an optimum mode of propulsion as Mach number increases. At present the ramjet is confined to use in missiles and the turbine engine is primarily an aircraft power unit. The trend is apparent already, however, for the turbine engine to move closer to a ramjet cycle when used above Mach 3. The following paper summarizes the features of the major high speed aircraft and missiles in being or soon to be built.

The balanced scorecard (BSC) allows firms to place importance on both financial and nonfinancial performance measures in four perspectives for developing and implementing corporate strategy and performance evaluation. The BSC literature however provides minimal insight on how to set targets, how to weigh measures when evaluating managers and the firm, and how to resolve conflicts that arise in the BSC process. Researchers have attempted to fill these gaps using two contending approaches. In particular, Datar et al. (2001) uses an agency model to select the optimal set of weights and more recently Herath et al. (2009) develop a mathematical programming–based collaborative decision model to find the optimal (or approximately optimal) set of target and weights considering inputs from two parties. In this article, we apply the Herath et al. (2009) model to a detailed BSC example. We demonstrate how the collaborative BSC model can be implemented in Microsoft Excel by practitioners to minimize BSC conflicts. Finally, we discuss how the model facilitates alignment and a culture of open reporting (information sharing) around the BSC that is necessary for its effective implementation.

A radically new jet engine, the PW4000, designed to save airlines hundreds of millions of dollars a year in fuel and maintenance costs, will be developed by United Technologies' Pratt & Whitney Group, the company said recently.

The purpose of this paper is to take a serious look at the relationship between joint consultation systems at the workplace and employee satisfaction, while at the same time accounting for the (possible) interactions with similar union and management-led high commitment strategies.

Using new, rich data on a representative sample of British workers, the authors identify workplace institutions that are positively associated with employee perceptions of work and relations with management, what in combination the authors call a measure of the “good workplace.” In particular, the authors focus on non-union employee representation at the workplace, in the form of joint consultative committees (JCCs), and the potential moderating effects of union representation and high-involvement human resource (HIHR) practices.

The authors’ findings suggest a re-evaluation of the role that JCCs play in the subjective well-being of workers even after controlling for unions and progressive HR policies. There is no evidence in the authors’ estimates of negative interaction effects (i.e. that unions or HIHR negatively influence the functioning of JCCs with respect to employee satisfaction) or substitution (i.e. that unions or HIHR are substitutes for JCCs when it comes to improving self-reported worker well-being). If anything, there is a significant and positive three-way moderating effect when JCCs are interacted with union representation and high-involvement management.

This is the first time – to the authors’ knowledge – that comprehensive measures of subjective employee well-being are being estimated with respect to the presence of a JCC at the workplace, while controlling for workplace institutions (e.g. union representation and human resource policies) that are themselves designed to involve and communicate with workers.

The Department of Information Science of the Heinrich-Heine-University in Düsseldorf is currently conducting a research project on Informational World Cities – the prototypical cities of the knowledge society, which have been growing in the twenty-first century. In total, 31 potential Informational World Cities were identified and a set of criteria was developed to evaluate the degree of informativeness of a city through coherent criteria. The purpose of this paper is to investigate London.

The investigation was based on the Grounded Theory, ethnographic field research, interviews, bibliometrics, patentometrics, official statistics and the analysis of web content. During the stay in London, eight semi-standardised interviews according to SERVQUAL were conducted.

The characteristics of an Informational World City are well-marked in most cases, especially London’s knowledge infrastructure. Furthermore London places value on smart innovations and tries to adapt public transport to the growing population. This includes, next to an enhancement of the train capacities, information and communication technology, since the digital infrastructure keeps gaining importance. The ethnic/cultural diversity as well as the international connectivity and the creative infrastructure are also distinguishing marks of London. Nevertheless, especially the digital and smart infrastructure require enhancement. London’s government is ambitioned, though, to make progress and pursues plans which are of benefit to the city’s informativeness.

This paper gives insight into the characteristics of the prototypical city of the upcoming knowledge society.

This paper follows an interdisciplinary approach and combines information science, urban studies and sociology to analyse cities of the knowledge society. Furthermore it is the first time that London is considered an Informational World City in an empirical study.

The purpose of this paper is to provide a better understanding of the driving forces and structural changes of China as a market provider for Korea. This paper gives the answers for the following questions: How do China’s final demands trigger the growth of its imports from Korea? And what’s the impact of China’s final demands on the import in different industries?

Based on the Multi-Regional Input-Output model and World Input-Output Table database, this paper constructs the non-competitive imports input-output (IO) table of China to Korea. According to this table, we can calculate the induced imports coefficient and comprehensive induced import coefficients of China’s four final demands for imports from Korea in the 56 industries in China.

Among the four driving forces, the strongest one is changes in inventories and valuables. The impact of final consumption expenditure and fixed capital formation is much lower than that of changes in inventories and valuables, but they have a broader impact for the 56 industries. This paper finds out the China’s import induction of the final demands to Korea peaked in 2005 and 2010 and decreased greatly in 2014, so the position of China as market provider for Korea will no longer rise substantially, contrarily it will be in a steady state.

First, this paper constructs the non-competitive IO table to analyze the market provider issues between two countries and provides practical ways and methods for studies on the issues of imports and market provider. Second, this paper investigates the different roles of four final demands on driving force of China as market provider for Korea and the structural changes of China as a market provider for Korea among 56 industries from 2000 to 2014.

This research paper uses a novel methodological approach to investigate the spillover effects among the key sectors of the US economy.

The paper links the US sectors via a node theoretic scheme based on a general equilibrium framework, whereas it estimates the general equilibrium equation as a Global Vector Autoregressive process, taking into consideration the potential existence of dominant units.

Based on our findings, the dominant sector in the US economy, for the period 1992–2015, is the sector of information technology, finance and communications, a fact that gives credence to the view that the US economy is a service-driven economy. In addition, the US economy seems to benefit by the increased labour mobility across knowledge-intensive sectors, thus avoiding the ‘employment trap’ which in turn enabled the US economy to overcome the financial crisis of 2007.

Firstly, the paper models by means of a network approach which is based on a general equilibrium framework, the linkages between the US sectors while treating the sector of information, technology, communications and finance as dominant, as dictated by its degree of centrality in the network structure. Secondly, the paper offers a robustness analysis regarding both the existence and the identification of dominant sectors (nodes) in the US economy. Thirdly, the paper studies a wide period, namely 1992–2015, fully capturing the recent global recession, while acknowledging the impact of the global crisis through the introduction of the relevant exogenous dummy variables; Lastly and most importantly, it is the first study to apply the GVAR approach in a network general equilibrium framework at the sectoral level.

Characterisation and use of dielectric materials with high permittivity are one of the most developed areas of research in microwave circuit simulation. This is mainly because of their various applications in VHF/UHF and microwave frequencies (correlators, instrumentation systems, …). The primary virtue of high‐dielectric substrates for microwave circuits is the reduced size. Since the high dielectric microstrip line also exhibit low loss and useful impedance range, this class of circuits will undoubtedly find wide applications in microwave integrated circuitry.

Owing to the complexity of the electromagnetic problem, numerical methods become an indispensable tool for analysis and modeling of electromagnetic structures. They are the basis to set‐up computer‐aided design (CAD) packages. These models must be accurate, reliable, easily extracted and need limited computational requirements. Since there was a demand for a model able to describe these parameters accurately, an extension of the spectral domain approach (SDA) is proposed for microstrip lines with high permittivity. The analysis is based on the solution of a system of algebraic equations, which are derived from Galerkin's technique in the spectral domain.

Analytical expressions are deduced by curve‐fitting techniques. These expressions can be easily implemented in a CAD simulation tool to design wireless communication components. In this paper, we have developed accurate and suitable general expressions for characteristic parameters for a wide range of ε_r between 1 and 500. The computed results were compared to those available in the literature when possible. In order to validate our models for high values of dielectric constant (128 < ε_r<500), neural models were generated for the characteristic impedance and effective permittivity. A very good agreement is demonstrated.

The originality of this paper consists on the development of design formulas to characterise the microstrip lines with high dielectric constant substrate. Closed form equations are almost non‐existent in the technical literature since the available design formulas have been developed only for dielectric media value ε_r not exceed 128.