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An estimated twenty million American men and women are in relationships in which the man has stopped being sexually intimate. Is the problem physical, emotional, or psychological--or are these guys simply bored with their partners?

To find answers, bestselling author and relationship expert Dr. Bob Berkowitz and his wife, Susan Yager-Berkowitz, began an unprecedented survey of more than four thousand men and women in this situation, gathering data and following up with hundreds of interviews with selected respondents. Why Men Stop Having Sex provides a unique window into the...

From simple reflexes to complex choreographies of movement, all animal behavior is governed by a nervous system. But what kind of government is it--a dictatorship or a democracy?

Nervous systems consist of circuits of interconnected nerve cells (neurons) that transmit and receive information via electrical signals. Every moment, each neuron adds up stimulating and inhibiting inputs from many other neurons to determine whether to send an electrical signal to its recipients. Some circuits are dominated by a single "dictator" neuron that gathers information from many sources and then...

"The Stubborn Fat Fix" WINS THE "BEST BOOKS 2010" AWARD for Health: Diet/Weight Loss Category

Do you feel tired all the time? Do you feel hungry between meals, even if you've just eaten? Do you crave candy, soda, or coffee, especially in the mid-afternoon?

If you answered yes to any of these questions, you may have a metabolic disadvantage. Most diet plans fail because they don't address the underlying metabolic conditions that contribute to increased hunger and weight gain. In fact, they often worsen the problem by cutting calories and prompting food cravings. This further stresses...

Atomic and Molecular Photoabsorption: Partial Cross Sections is a companion work to Joseph Berkowitz's earlier work, Atomic and Molecular Photoabsorption: Absolute Total Cross Sections, published with Academic Press in 2002.

In this work Joseph Berkowitz selected the "best" absolute partial cross sections for the same species as included in the companion work. A contrast, however, is that photoabsorption measurements, being of order I/Io, do not require the most intense light sources, whereas acquiring data on the products of light interactions with gaseous matter...