Figure 1.1 Every day, 7.5 million people use the railways around Mumbai, India. The vast majority of them don’t know each other, but they share much in common as they move together. (Credit: Rajarshi MITRA/flickr) Chapter Outline A busy commuter train station might seem like a very individualized place. Tens of thousands or hundreds of thousands of […]
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Chapter 1 : Before the Advent of Database Systems Database Design – 2nd Edition is a remix and adaptation based on Adrienne Watt’s book Database Design. ADRIENNE WATT The way in which computers manage data has come a long way over the last few decades. Today’s users take for granted the many benefits found in a database
Learning Objectives By the end of this section, you will be able to: It is often the case that a quantity of interest may not be easy (or even possible) to measure directly but instead must be calculated from other directly measured properties and appropriate mathematical relationships. For example, consider measuring the average speed of
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Learning Objectives We have studied the general characteristics of functions, so now let’s examine some specific classes of functions. We begin by reviewing the basic properties of linear and quadratic functions, and then generalize to include higher-degree polynomials. By combining root functions with polynomials, we can define general algebraic functions and distinguish them from the
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Learning Objectives By the end of this section, you will be able to: Counting is the only type of measurement that is free from uncertainty, provided the number of objects being counted does not change while the counting process is underway. The result of such a counting measurement is an example of an exact number. By
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Learning Objectives By the end of this section, you will be able to: Measurements Measurements provide much of the information that informs the hypotheses, theories, and laws describing the behavior of matter and energy in both the macroscopic and microscopic domains of chemistry. Every measurement provides three kinds of information: the size or magnitude of
Abdominal Trauma Imaging WRITTEN BY: Nadia Mama, Hela Jemni, Nadia Arifa Achour, Ould Chavey Sidiya, Kaled Kadri, Mehdi Gaha, Ibtisem Hasni and Kalthoum Tlili Published: August 14th, 2012 DOI: 10.5772/50426 FROM THE EDITED VOLUME Abdominal Surgery Edited by Fethi Derbel Book Details Order Print CHAPTER METRICS OVERVIEW 12,583 Chapter DownloadsView Full Metrics 1. Introduction Isolated blunt
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Figure 1.1 A portion of the San Andreas Fault in California. Major faults like this are the sites of most of the strongest earthquakes ever recorded. (credit: modification of work by Robb Hannawacker, NPS) Chapter Outline In the past few years, major earthquakes have occurred in several countries around the world. In January 2010, an earthquake of
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Learning Objectives By the end of this section, you will be able to: Physical and Chemical Properties The characteristics that distinguish one substance from another are called properties. A physical property is a characteristic of matter that is not associated with a change in its chemical composition. Familiar examples of physical properties include density, color, hardness, melting
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Learning Objectives By the end of this section, you will be able to: Matter is defined as anything that occupies space and has mass, and it is all around us. Solids and liquids are more obviously matter: We can see that they take up space, and their weight tells us that they have mass. Gases are
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