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Helicopter vibration is like toothache; many operators put up with it because the cure might be painful, but the more enlightened seek treatment. No operator likes to counterance the down‐time and disruption caused by traditional diagnosis and tuning methods. Nowadays, thanks largely to pioneering work carried out in this country, the cure for excessive vibration can be quick, sure and inexpensive. This article describes how the situation has been changed by the evolution of scientific tuning methods over the last fifteen years.

In The Accumulation of Capital (2015a), Rosa Luxemburg emphasises the importance of demand realisation in Marx's economics. First, by studying the history of political economy a refutation is provided of the suggested harmony between production and consumption (what came to be called Say's Law) first proposed by Say and J. Mill. Second, in her analysis of Marx's reproduction schemes, Luxemburg identifies the key role of demand constraints, set in the circulation of money. Central to this analysis is how the specific peculiarities of capitalism, such as constraints on the demand for commodities by wage labour, serve to intensify problems associated with Say's Law. The main purpose of this chapter is to consider how a refutation of Say's Law can be established in Luxemburg's treatment of the reproduction schemes that featured in Polish discussions of economic reproduction.

This analysis builds on the examination of Say's Law provided by Trigg (2020) under the confines of simple commodity circulation. Luxemburg's simple reproduction scheme provides a useful starting point for extending this refutation to the arena of capitalism. Core to this approach is how commodity money undergoes wear and tear as money circulates: a phenomenon that is considered by Luxemburg introducing a new department of production for the money commodity. By developing this system, and drawing on Marx's writings in Theories of Surplus Value, part 2 (Marx, 1968), the analysis will provide a systematic exploration of Marx's inevitability theory of crises under capitalism, as an extension of the more established possibility theory of crises under simple circulation.

The concepts of ethics and conscience are integral elements of architectural design education. Conscience as a guide to the ethical behavior is seen as one of the instincts which helped people to build societies, communities and cities. This attribute makes conscience and ethics essential for architecture. The process of becoming an architect through its extraordinary architectural studio experience, gives us the chance to develop hope for a better world, by creating new solutions. The discussion of architectural programs focusing on the conception of future, choices stressing values, dualities coping with ambiguity and dilemmas leading to ethics are suggested themes. Through the integration of these themes into our studio discussions, the concepts of ethics and conscience can become an integral part of design education.

In the academic field of business management, several potential theories were established during the last decades to explain companies' decisions, organizational behavior, consumer patterns, and internationalization, among others. As a result, businesses and scholars were able to analyze and decide based on theoretical approaches to explain the current conditions of the market. Secondary research was conducted to collect more than 36 management theories. This chapter aims to develop the most famous theories related to business applied in the international field. The novelty of this chapter relies on the compilation of recognized previous research studies from the academic literature and evidence in international business.