When designing applications, it is important to know when to use an abstract class and when to use an interface. Although abstract classes and interfaces seem similar in some ways, there are key ...

What exactly is a Class I location? Can you define it, or better yet, easily identify it in the field? You have a Class I location any time enough flammable gases or vapors are present in the air in ...

There is now a body of literature questioning the link between small class size and student success. A new study of interactions between different class sizes and more than a dozen other variables ...

Social scientists use 3 common methods to define class—by occupation, income, or education—and there is really no consensus about the “right” way to do it. Michael Zweig, a leading scholar in ...

Of all classes, the rich are the most noticed and the least studied. — John Kenneth Galbraith “Higher social class predicts increased unethical behavior.” This is the title of a research report by ...