Xem 1-20 trên 114 kết quả Natural phenomena
  • This Acid rain and its effects presents: Definition Acid rain, Emissions of chemicals leading to acidification, Natural phenomena, Human activity, Chemical processes to form acid rain, Measuring Acid Rain, Adverse effects,..

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  • Hurricanes, floods, earthquakes, landslides and volcanic eruptions—and the devastation they inflict—are all too familiar to the countries of Latin America and the Caribbean. In the last decade, natural disasters have caused more than 45,000 deaths in the region, left 40 million injured or in need of assistance, and carried a price tag—in direct damage alone—of more than US$20 billion.1 The health sector has proven particularly vulnerable to such havoc.

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  • Crystal growth is an important process, which forms the basis for a wide variety of natural phenomena and engineering developments. This book provides a unique opportunity for a reader to gain knowledge about various aspects of crystal growth from advanced inorganic materials to inorganic/organic composites, it unravels some problems of molecular crystallizations and shows advances in growth of pharmaceutical crystals, it tells about biomineralization of mollusks and cryoprotection of living cells, it gives a chance to learn about statistics of chiral asymmetry in crystal structure....

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  • The end of the 1970s saw the idea of fractal geometry spread into numerous areas of physics. Indeed, the concept of fractal geometry, introduced by B. Mandelbrot, provides a solid framework for the analysis of natural phenomena in various scientific domains. As Roger Pynn wrote in Nature, “If this opinion continues to spread, we won’t have to wait long before the study of fractals becomes an obligatory part of the university curriculum.”

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  • Engineering is the goal-oriented process of designing and making tools and systems to exploit natural phenomena for practical human means, often (but not always) using results and techniques from science. The development of technology may draw upon many fields of knowledge, including scientific, engineering, mathematical, linguistic, and historical knowledge, to achieve some practical result.

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  • We exploit and extend the Generative Lexicon Theory to develop a formal description of adnominal constituents in a lexicon which can deal with linguistic phenomena found in Japanese adnominal constituents. We classify the problematic behavior into "static disambiguation" and "dynamic disambiguation" tasks. Static disambiguation can be done using lexical information in a dictionary, whereas dynamic disambiguation requires inferences at the knowledge representation level. 1 Introduction Natural language processing must disambiguate polysemous constituents in the input sentences. ...

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  • Charles Best, one of the pioneers in the search for a cure for diabetes, once explained what intrigued him so about medical research: “It’s not just the gratification of knowing one is helping people,” he confided, “although that probably is a more heroic and selfless motivation. Those feelings may enter in, but truly, what I find best is the feeling of going toe to toe with nature, of trying to solve the most difficult puzzles ever devised. The answers are there somewhere, those keys that will solve the puzzle and make the patient well. But how will those keys be found?”...

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  • In recent years, machine learning (ML) has been used more and more to solve complex tasks in different disciplines, ranging from Data Mining to Information Retrieval or Natural Language Processing (NLP). These tasks often require the processing of structured input, e.g., the ability to extract salient features from syntactic/semantic structures is critical to many NLP systems. Mapping such structured data into explicit feature vectors for ML algorithms requires large expertise, intuition and deep knowledge about the target linguistic phenomena.

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  • Discourse in formal domains, such as mathematics, is characterized by a mixture of telegraphic natural language and embedded (semi-)formal symbolic mathematical expressions. We present language phenomena observed in a corpus of dialogs with a simulated tutorial system for proving theorems as evidence for the need for deep syntactic and semantic analysis. We propose an approach to input understanding in this setting.

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  • That are ill-formed with respect to the grammar will be received, both because p e o p l e regularly form ungra=cmatical utterances and because there are a variety of forms that cannot be readily included in current grammatical models and are hence "extra-grammatical". These might be rejected, but as Wilks stresses, "...understanding requires, at the very least, ... some attempt to interpret, rather than merely reject, what seem to be ill-formed utterances." [WIL76] This paper i n v e s t i g a t e s several language phenomena commonly considered ungrammatical....

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  • This paper reviews discourse phenomena that occur frequently in task.oriented man.machine dialogs, reporting on a~n empirical study that demonstrates the necessity of handling ellipsis, anaphora, extragrammaticality, inter-sentential metalanguage, and other abbreviatory devices in order to achieve convivial user interaction. Invariably, users prefer to generate terse or fragmentary utterances instead of longer, more complete "standalone" expressions, even when given clear instructions tO the contrary.

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  • In this paper, we present a logic-based computational model for movement theory in Government and Binding Theory. For that purpose, we have designed a language called DISLOG. DISLOG stands for programming in logic with discontinuities and permits to express in a simple, concise and declarative way relations or constraints between non-contiguous elements in a structure. DISLOG is also weel adapted to model other types of linguistic phenomena like Quantifier Raising involving long-distance relations or constraints. ...

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  • Science (in Latin Scientia, meaning "knowledge" or "understanding") is the efforts to implement the invention, and increased knowledge of the human understanding of how the operation of the physical world surroundings. Through controlled methods, scientists use to observe the signs of expression or of the material and unusual nature to collect data, analyze information to explain how it works, there at the phenomenon of things. One of the ways that test method to simulate natural phenomena under controlled conditions and tested ideas.

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  • Like all other sciences, physics is based on experimental observations and quantitative measurements. The main objective of physics is to find the limited number of fundamental laws that govern natural phenomena and to use them to develop theories that can predict the results of future experiments. The fundamental laws used in developing theories are expressed in the language of mathematics, the tool that provides a bridge between theory and experiment

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  • The first edition of Handbook of MRI Technique was a resounding success. The rapidly increasing number of radiographers and technologists entering the modality, coupled with the development of education and training courses worldwide, has resulted in an increased demand for MRI books of any shape and size. The education of radiographers, technologists and radiologists often lags behind the rapid technological advances in MR.

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  • Scientists may also have to complete engineering tasks, such as designing experimental apparatus or building prototypes. Conversely, in the process of developing technology engineers sometimes find themselves exploring new phenomena, thus becoming, for the moment, scientists.

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  • Biological and medical phenomena are complex and intelligent. Our observations and understanding of some of these phenomena have inspired the development of creative theories and technologies in science. This process will continue to occur as new developments in our understanding and perception of natural phenomena continue. Given the complexity of our natural world this is not likely to end.

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  • Geography is the study of the transformation of spatial location of natural and human phenomena on Earth. Topics include: The location on Earth and in space Civilized areas such as national or local city and Sciences related to geography

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  • Biometrics-Unique and Diverse Applications in Nature, Science, and Technology provides a unique sampling of the diverse ways in which biometrics is integrated into our lives and our technology. From time immemorial, we as humans have been intrigued by, perplexed by, and entertained by observing and analyzing ourselves and the natural world around us.

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  • A combinatorial bijection between k-edge colored trees and colored Pr¨ufer codes for labelled trees is established. This bijection gives a simple combinatorial proof for the number k(n − 2)!nk−n n−2 of k-edge colored trees with n vertices.A k-edge colored tree is a labelled tree whose edges are colored from a set of k colors such that any two edges with a common vertex have different colors

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