Starting from the basics of a power distribution system, the author explained the mechanism of how grounding noise currents arise in a facility transformer. This is followed by computer simulation of short circuit or fault currents required in sizing the interrupting capacity of a circuit breaker. Chapter 3 closely examines propagation constant and characteristic impedance of a transmission line. The model of a transmission line can explain most of the electrical or electronics problems. Some of these problems include redundancy in power systems, and grounding noise voltage. Often, an engineer needs to find the cause of a failure in a system. He must have, at his disposal, a systematic method of testing to find the most probable cause of failure. This book recommends the boundary approach in finding such a cause. Testing may involve characterizing a device or a signal. An example of how an unknown device may be characterized is shown in this book. In this book, a grounding noise voltage is treated as a signal. It is, perhaps, the most common cause of failures in electronic systems. To illustrate an example of how a signal may be characterized and address grounding itself, Chapter 7 shows experiments on how a grounding noise voltage may be minimized. Finally, Chapter 8 is a recommended approach in designing a grounding system.
This book is about computer simulation, experiments, and theoretical approaches to unify various strategies in black jack. The computer simulation uses the simple strategy that a player must stay when the number of low cards is two or more. Otherwise, when the number is exactly one then the player must hit. Contrary to the author's expectations, the simple strategy did give consistent positive results for the player. Experimenting further, the author found other observations that are important in winning such as when to start playing, busting condition of the dealer, and the shifting property of the cards. The author unified all the observations using the TM*L model. In the model, T represents the tens 10, J, Q, and K. The M* represents the medium cards 7, 8, and 9, and the ace. L represents the low cards from 2 to 6. He also represented the game using a partial differential equation. The solution of the equation showed the sensitivity of winning with the tens, the medium cards, and the low cards. In addition, the solution verified the shifting property of the cards. The property shows that good cards move from the player to the dealer. Conversely, they can move from the dealer to the player.
With some of the most significant levels of financial dollarization in the Western Hemisphere, Uruguay is characterized by extensive dollarization in both deposits and loans. While traditional factors like high inflation and substantial devaluations have been associated with such outcome, the enduring nature of dollarization in Uruguay also underscores the importance of structural elements. In formulating a holistic strategy to reduce dollarization, not only should there be an enhancement of the monetary policy framework aimed at maintaining low, stable inflation, but it should also consider the calibration of prudential policies such as currency-differentiated reserve requirements and foreign-currency credit repos.
Amid rapid population growth, migration in sub-Saharan Africa has been increasing briskly over the last 20 years. Up to the 1990s, the stock of migrants—citizens of one country living in another country—was dominated by intraregional migration, but over the last 15 years, migration outside the region has picked up sharply. In the coming decades, sub-Saharan African migration will be shaped by an ongoing demographic transition involving an enlargement of the working-age population, and migration outside the region, in particular to advanced economies, is set to continue expanding. This note explores the main drivers of sub-Saharan African migration, focusing on migration outside the region, as this has greater global spillovers. It finds that the economic impact of migration for the region occurs mainly through two channels. First, the migration of young and educated workers—brain drain—takes a toll as human capital is already scarce in the region, although some recent studies suggest that migration may have also a positive effect—brain gain. Second, remittances represent an important source of foreign exchange and income in a number of sub-Saharan African countries, contribute to the alleviation of poverty, and help smooth business cycles.
In this exciting Handbook, Ian Jarvie and Jesús Zamora-Bonilla have put together a wide-ranging and authoritative overview of the main philosophical currents and traditions at work in the social sciences today. Starting with the history of social scientific thought, this Handbook sets out to explore that core fundamentals of social science practice, from issues of ontology and epistemology to issues of practical method. Along the way it investigates such notions as paradigm, empiricism, postmodernism, naturalism, language, agency, power, culture, and causality.
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