According to the World Health Organization, more than half of the people in the world are overweight (39%) or obese (13%). Obesity is associated with increased risks for cardiovascular disease, diabetes, and certain forms of cancer.
Modern medicine is overwhelmingly reactive rather than proactive. Get sick, seek medical help. How expensive that model is! If everyone only got sick and then sought medical assistance, we could not afford the bill. It is much better that most people are healthy enough at any one time that they do not need medical care—for the people themselves, for the economy, and for the whole medical profession.
The universe is the most fundamental wonder: we, as humans, face it every day, contemplate it in endless amazement, question it in our search for answers. And long ago, at a particular moment in a tiny piece of that great wonder, a second wonder, perhaps deeper in reach, emerged: life. Then, slowly, life evolved to contain within it a third wonder, possibly greater in some respects than the universe itself: the human mind.
Physical recreation, hormone secretion, immune systems, memory functions, and mood are all related to sufficient and restorative sleep. As biomedical engineers, we would like to quantify this ultimate “sleep quality,” but how can we assess it?
Many engineering schools in the United States provide opportunities for their undergraduate students to gain practical, real-world experience in their chosen disciplines. Cooperative education is a structured method of combining classroom-based education with practical work experience.
It may seem like letting the fox in to guard the henhouse when students are asked to help with the way a class is taught, but it can be valuable to learn directly about student perceptions of course presentations. Having students help direct your course teaching is not such a bad idea.
The origins of convolution and its further and rather complex historical development were dealt with in detail in a previous article. We saw there that it can be traced back to the middle of the 18th century; however, its modern form and use are not more than 50 or 60 years old.
The world is facing a challenge of population growth that carries with it the need to provide all those extra people with sustenance. The human population of the earth currently has an annual growth rate of 1.2%; if that continues, humanity will double in number every 60 years.
A previous “Retrospectroscope” note dealt with spirometry: it described many apparatuses used to measure the volume of inhaled and exhaled air that results from breathing. Such machines, when adequately modified, are also able to measure the rate at which work is produced.
For a long time, sleep researchers have asked why we sleep and what are the physiological and mental needs which require sleep . Today we understand that sleep is important for productivity, health, cognition, and well-being. As a consequence, physical recreation, hormone secretion, immune systems,