Books with author James Roland

Have you ever wondered how the lights in your alarm clock work? Or have you ever considered how that tiny red light in your TV remote control sends a signal that helps you find your favorite show? What these and countless other bright devices have in common is a light-emitting diode, or LED. But how does an LED work? How is it different from other lightbulbs? Explore the key concepts that make up an LED, including semiconductors, electrons, color, and more. Learn how LEDs are used in electronics, to light homes, and even to grow food for astronauts!

Jobs in mental health are in high demand, but they require a strong passion for helping others overcome mental, emotional and behavioral challenges. Comments from professionals in the industry, current statistics, job forecasts, and realistic descriptions of occupations ranging from psychiatrists and psychologists to psychiatric nurses and licensed clinical social workers provide a helpful look at some of varied and fascinating careers in mental health.

Have you ever wondered how the lights in your alarm clock work? Or have you ever considered how that tiny red light in your TV remote control sends a signal that helps you find your favorite show? What these and countless other bright devices have in common is a light-emitting diode, or LED. But how does an LED work? How is it different from other lightbulbs? Explore the key concepts that make up an LED, including semiconductors, electrons, color, and more. Learn how LEDs are used in electronics, to light homes, and even to grow food for astronauts!

Did you know that electric current can be controlled? Have you ever wondered how that might be done? Transistors can act as amplifiers, taking in a small current and sending out a larger one, or as switches, turning electric current on and off. But how do these different transistors work? How are they used in our electronic devices? Discover the history of how transistors were developed, explore how different types of transistors can play different roles in electronics, and learn where transistors may be taking technology in the future!

When problem solvers encounter mysteries, complications, or seemingly impossible tasks, they dont give in or give up. They search for solutions. Many job options exist for people who like problem solving. They work as cybersecurity experts, biomedical engineers, law enforcement officers, and more. What these and other jobs entail, what they pay, and future prospects are discussed along with insights from industry insiders.

On December 18, 2019, Donald Trump became the third president in US history to be impeached by the House of Representatives. He was later acquitted by the Senate. Earlier that summer, Trump held a phone call with President Volodymyr Zelensky of Ukraine. An unknown whistleblower raised concerns about the call, claiming that Trump had improperly pressured Zelensky to get involved in US politics. Over the following months a dramatic impeachment inquiry unfolded. Fraught hearings played out on television while Democrats and Republicans traded interpretations, arguments, and even insults. Faced with suppressed information and conflicting accounts, the nation tried to discover the truth. In over two hundred years Congress has gathered only a handful of times to debate what makes an impeachable offense. What events led to Trump’s impeachment? How does the impeachment process work? What other presidents have been impeached, and why? Learn the history, mechanics, and milestone events behind impeachment, and discover how the most recent one may affect US politics for years to come.

"While ICE officials and others concerned about the presence of undocumented immigrants may understand the anxiety associated with living in the U.S. without authorization, they say the issue boils down simply to right and wrong. And therein lies the enormous challenge facing the nation, from small towns in Mississippi to Congress and the White House: How should America deal with undocumented immigrants. There are an estimated 11 million undocumented immigrants in the U.S"--

On December 18, 2019, Donald Trump became the third president in US history to be impeached by the House of Representatives. He was later acquitted by the Senate. Earlier that summer, Trump held a phone call with President Volodymyr Zelensky of Ukraine. An unknown whistleblower raised concerns about the call, claiming that Trump had improperly pressured Zelensky to get involved in US politics. Over the following months a dramatic impeachment inquiry unfolded. Fraught hearings played out on television while Democrats and Republicans traded interpretations, arguments, and even insults. Faced with suppressed information and conflicting accounts, the nation tried to discover the truth.In over two hundred years Congress has gathered only a handful of times to debate what makes an impeachable offense. What events led to Trump’s impeachment? How does the impeachment process work? What other presidents have been impeached, and why? Learn the history, mechanics, and milestone events behind impeachment, and discover how the most recent one may affect US politics for years to come.