Based on the simulations developed in research groups over the past years, Introduction to Quasi-dimensional Simulation of Spark Ignition Engines provides a compilation of the main ingredients necessary to build up a quasi-dimensional computer simulation scheme. Quasi-dimensional computer simulation of spark ignition engines is a powerful but affordable tool which obtains realistic estimations of a wide variety of variables for a simulated engine keeping insight the basic physical and chemical processes involved in the real evolution of an automotive engine. With low computational costs, it can optimize the design and operation of spark ignition engines as well as it allows to analyze cycle-to-cycle fluctuations. Including details about the structure of a complete simulation scheme, information about what kind of information can be obtained, and comparisons of the simulation results with experiments, Introduction to Quasi-dimensional Simulation of Spark Ignition Engines offers a thorough guide of this technique. Advanced undergraduates and postgraduates as well as researchers in government and industry in all areas related to applied physics and mechanical and automotive engineering can apply these tools to simulate cyclic variability, potentially leading to new design and control alternatives for lowering emissions and expanding the actual operation limits of spark ignition engines
This book outlines the transitions between cultured and natural land cover/vegetation types and their implications in the search for alternatives to reverse the trend of anthropogenic environmental degradation. It also elaborates on the proposed “standardized hierarchical Mexican vegetation classification system” and geobotanical mapping, a critical transversal environmental issue. The first chapter consists of an historical review of the common approaches to the study of vegetation both in Mexico and in other regions of the world. The second chapter concisely analyzes the existing schools of thought that have led to the development of vegetation classification systems based on physiognomic, structural and floristic approaches. The focal point of the book is the “standardized hierarchical Mexican vegetation classification system” (SECLAVEMEX – “Sistema jerárquico estandarizado para la clasificación de la vegetación de México”). Chapter 3 describes the system’s organizational levels along with the criteria defining them and the nomenclatural basis for the denomination of each type of vegetation. It also includes a series of tables explaining and precisely defining the meaning of each concept, criterion, character and element used to help readers successfully identify the type of vegetation in a determined area. The fourth chapter highlights SECLAVEMEX's inclusive character as evidenced through its compatibility with other systems currently used around the globe. Three concepts are critically reviewed: land cover, land use and vegetation. These are often the study subject of the contrasting disciplines geography, agronomy and ecology, which all rely upon plant species assemblages. As such, the final chapter focuses on a critical transversal environmental issue – geobotanical mapping. Geobotanical mapping offers a baseline for land cover/use planning and provides critical information on ecological, economic and cultural attributes, which can be used as a basis for environmental-policy decisions. The proposed SECLAVEMEX was applied to Mexico as an example of land cover, land use and vegetation patterns intermingling as the result of a long human influence. SECLAVEMEX, however, can be adapted and hopefully adopted globally as a baseline for consistently comparing geobotanical patterns and their transitions.
Several Central American (CADR) central banks with independent monetary policies have adopted policy interest rates as their main instrument to signal their monetary policy stances, often in the context of adopting or transitioning to inflation targeting regimes. This paper finds that the interest-rate transmission mechanism, or the pass-through of the policy rate to market rates, is generally weaker and slower in CADR than in the LA6, the countries selected as benchmarks. A variety of potential factors behind this finding are examined, including the degrees of financial dollarization, exchange rate flexibility, bank concentration, financial sector development, and fiscal dominance. Through panel data analysis, the study suggests that the transmission mechanism can be strengthened by increasing exchange rate flexibility, and, over time, by adopting measures towards reducing financial dollarization, developing the financial sector, and reducing bank concentration.
Several Central American (CADR) countries with independent monetary policies are strengthening their monetary frameworks and some have implemented or are moving towards inflation targeting (IT) regimes. Strengthening the monetary policy frameworks of CADR is key to improving the effectiveness of monetary policy. The paper reviews the literature on the reforms needed for strengthening the monetary policy frameworks, and examines the experiences of IT countries, Chile, Peru, and Uruguay to help distill lessons for CADR. It also constructs an index to measure the relative strength of the monetary policy framework of CADR countries.
Over the last decade, empirical studies analyzing macroeconomic conditions that may affect the size of government spending multipliers have flourished. Yet, in spite of their obvious public policy importance, little is known about public investment multipliers. In particular, the clear theoretical implication that public investment multipliers should be higher (lower) the lower (higher) is the initial stock of public capital has not, to the best of our knowledge, been tested. This paper tackles this empirical challenge and finds robust evidence in favor of the above hypothesis: countries with a low initial stock of public capital (as a proportion of GDP) have significantly higher public investment multipliers than countries with a high initial stock of public capital. This key finding seems robust to the sample (European countries, U.S. states, and Argentine provinces) and to the identification method (Blanchard-Perotti, forecast errors, and instrumental variables). Our results thus suggest that public investment in developing countries would carry high returns.
De la misma manera que en el nuevo mileniolos géneros sexuales languidecen, por fortuna,lo mismo ocurre con los literarios. Esta antología incluye cuento, poesía, crónica, ensayo personal y novela. Muchos de los textos están felizmente contaminados de uno y otro estilo.Toda literatura es una experiencia. Salvo un par que publicó en los 90, este trabajo reúne autores que en casi dos décadas hicieron una obraen tierra norteamericana: algunos describen la relación con el país extranjero en el que viven;a la vez, los escenarios se extienden por el resto del mundo. Es decir: los escritores que ya están afincados no siguen necesariamente hablando de inmigración, indocumentados, etc. Ya lo hicieron y ahora tienen nuevas obsesiones.
Embryology is a branch of science concerned with the morphological aspects of organismal development. The genomic and molecular revolution of the second half of the 20th century, together with the classic descriptive aspects of this science have allowed greater integration in our understanding of many developmental events. Through such integration, modern embryology seeks to provide practical knowledge that can be applied to assisted reproduction, stem cell therapy, birth defects, fetal surgery and other fields. This book focuses on human embryology and aims to provide an up-to-date source of information on a variety of selected topics. The book consists of nine chapters organized into three sections, namely: 1) gametes and infertility, 2) implantation, placentation and early development, and 3) perspectives in embryology. The contents of this book should be of interest to biology and medical students, clinical embryologists, laboratory researchers, obstetricians and urologists, developmental biologists, molecular geneticists and anyone who wishes to know more about recent advances in human development.
Buying into Change examines how the development of a mass consumer society under the dictatorship of General Francisco Franco (1939–1975) inserted Spain into transnational consumer networks and set the stage for Spain’s transition to democracy during the late 1970s. This transition is broadly significant to both a Spanish public still struggling to redefine their society after Franco and to scholars who have long debated the origins of Spain’s current democracy, yet many aspects of it remain largely unexamined. Buying into Change incorporates mass consumption into our understanding of Spain’s democratic transition by tracing the spread and social impact of new foreign-influenced department stores, of imported innovations such as modern mass advertising, and of consumer magazines that promoted foreign products. Initially, these enterprises backed Franco’s conservative policies, and the regime in turn encouraged consumption in order to improve its image both domestically and abroad. Spain’s new globally oriented commerce ultimately sold retailers and shoppers not just foreign ways of buying and selling but also subversive ideas. Imported 1960s fashions brought along countercultural notions on issues such as gender equality. And as Spaniards consumed more like their foreign neighbors, they increasingly viewed themselves as cosmopolitan and European and identified with liberal political conditions abroad, undermining Francoism’s doctrine of national exceptionalism, thus laying the social foundations for democratization and European integration in Franco’s wake.
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