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Monday, November 14, 2016

The Grid by Gretchen Bakke

Anthropologist Gretchen Bakke has written about a system integral to the American lifestyle that we associate more with engineers: the electrical grid. The Grid describes how we arrived at the system we have, the forces that are operating on it and how they might shape its future.

The grid is more than a set of wires on poles. It is also a system of companies, markets, laws, regulations, government agencies, cultures and individual people. As an engineer, I feel it is important for me to be aware of the business, policy and cultural aspects of my work. Technology cannot be easily isolated from these things. An engineer who focuses completely on technology risks putting a lot of effort into a solution that fails for important non-technical reasons.

Having commented on engineering, I should mention that Bakke’s book is written for laymen.
She explains the science and technology of electricity in terms that I think most people can understand.

One of the reasons she doesn’t need to resort to deep technological or scientific explanations it that technology is not the biggest barrier to the grid of the future. Of course, technology is very important, but much of what we need to make our grid more resilient and wireless is already in our hands, or will be within our grasp in the near future.

The harder things to wrangle are the business and regulatory aspects of the grid. Renewable energy sources (especially variable sources like wind and solar), distributed generation (which is becoming increasingly affordable), increased efficiency, flat or declining demand, and regulatory reforms over the last three decades have put the squeeze on electric utilities. Our electric utilities, and the system of large, central generation plants they operate, were built for the business and regulatory setting of the early 20th Century, when rapidly increasing demand meant that the consolidation of generation into large plants controlled by highly-regulated monopolies made sense as a way to provide ever cheaper power for an ever growing population of customers.

By the 1960s, this model of growth was failing putting upward pressure on electric prices. Regulatory reforms starting in the 1980s introduced competition to electric markets that put another squeeze on utility profits.

These historic changes are still in action and accelerating. Environmental regulation and customer expectations about the use of renewable energy are also a growing pressure on the system, especially because the variability of solar and wind energy make it difficult to balance demand and generation on the grid, which must be done constantly and almost instantaneously.

In addition to describing how our grid came to be and the troubling weaknesses it has in light of our changing environment and expectations, Bakke looks to the future. Of course, no one knows what the grid make look like, but current developments have the potential to scale up to shape the grid.

A future grid is likely to be a highly computerized system of integrated microgrids that can operate independently when the larger grid is out. It will include many generators distributed across the grid (large, central power plants are on the way out) that take advantage of alternative and renewable energy sources. New developments in energy storage, such as the batteries that will be in fleets of electric cars, and a host of smart meters, homes and appliances will help us balance the grid. We’ll need to develop standards that allow all this new technology to communicate and work together as it also controls the existing parts of the grid that continue to be useful. Continued regulatory reform will be needed to adapt to these changes and possibly to force openness into a market that existing power monopolies may be tempted to guard. Utilities will need to find new business models, and we all might need to be open to what they could be, because it is unlikely that they’ll be able to keep going by selling kilowatt-hours in the old fashioned way.

If you’re interested in this book, you may also be interested in


Bakke, Gretchen. The Grid: The Fraying Wires between Americans and Our Energy Future. New York: Bloomsbury, 2016.

Thursday, April 1, 2010

Descarte’s Secret Notebook by Amir D. Aczel

Aczel, Amir D. Descartes’ Secret Notebook. New York: Broadway, 2005.

A famous mathematician with suspected ties to a secretive cabal of global reformers dies from possible poisoning at the hand of a doctor employed by a European power. A French official surveys his papers, including a coded notebook, and has them quietly sent to the safekeeping of a relative. Years later, another brilliant mathematician, suffering from attacks on his reputation, seeks out the notebook to uncover its secrets.

It sounds like the plot of a thriller. Amir Aczel uses it to frame his biography of philosopher and mathematician René Descartes.

Descartes’ greatest hit as a philosopher was, “Cogito, ergo sum” (I think, therefore I am). He was a leader in rationalism, a philosophy that emphasizes the discovery of truth by use of reason. His method focused on methodical doubt by which he aimed to find truth (to him, all knowledge was connected, not discreet, unrelated truths) by reasoning out those things that could not be doubted. Thusly he reasoned his existence because he couldn’t very well doubt it when he was sitting there thinking about it. His method set him against the prevailing philosophy of the day, scholasticism, which focused on learning from authoritative figures and sources, particularly Aristotle.

High school algebra students will immediately recognize Descartes’ contribution to math. From today’s perspective, it may be hard to understand why it was such a big deal in the 17th Century. Descartes created analytic geometry, which uses algebraic equations to describe and understand geometric shapes. Before this, geometry and algebra were distinct fields, not parts of a unified mathematics. As part of this, he gave us Cartesian coordinates, the familiar x,y graph that has makes so many high school kids cross-eyed. Despite complaints that they’ll never use it, behind the scenes Cartesian coordinates are ubiquitous.


Descartes was not part of a secret society. He was a devout Catholic and was careful not to publish anything that would put him in direct conflict with the church. Even so, the writings of the Rosicrucians, a group of philosophers who sought political and religious reform and the advancement of science, influenced him. He even knew one of the brotherhood, though he may have been unaware of it. Despite his efforts to distance himself from the Rosy Cross, his books used terms that made some believe he was a Rosicrucian and his notebook included alchemical symbols that the group used.

Gottfried Leibniz, co-creator of calculus, was under attack from proponents of Isaac Newton, who independently created calculus contemporaneously with Leibniz. Other accused Leibniz of deriving his work from Descartes, which is why he diligently tracked down the Frenchman’s papers.

What did Descartes’ secret notebook contain? Leibniz handily decoded it. Descartes discovered Euler’s theorem. For polyhedrons, the sum of the number of faces (F) and the number of vertices (V) minus the number of edges (E) is 2 (F + V – E = 2). Descartes kept his discovery secret because some may have construed it as supporting a theory of Johann Kepler that used regular polyhedrons to describe planetary orbits in a Copernican model of the solar system. This was contrary to the teaching of the church, which Descartes wanted to avoid because of his personal devotion and because conflict with the Inquisition could be a career-ending (and life-ending) move.

Amir D. Aczel also wrote Chance.

If you’re interested in this book, you may also be interested in
1089 and All That by David Acheson
Fortune’s Formula by William Poundstone
The Numbers behind NUMB3RS by Keith Devlin & Gary Lorden
The Unfinished Game by Keith Devlin

Sunday, February 21, 2016

Life's Matrix by Philip Ball

Water is a chemical essential to human life and culture, and it is possibly the oddest common substance. Physicist and science writer Philip Ball describes the nature of water, both scientific and cultural, in Life’s Matrix (originally published in the United Kingdom as H2O: A Biography of Water).

Ball begins at the very beginning—the big bang. Hydrogen, the simplest atom and most abundant element in the universe, appeared early in the universe. Oxygen is forged in stars and has become the third most abundant element. There is water in space. Ice seems to be common in the far reaches of the solar system. It has been found on the moon and stars and a few molecules appear in the cooler spots on the sun.

We have found no worlds yet that have as much liquid water as ours. The water cycle has shaped Earth. Our weather comes largely from the interplay of water and energy. Even the water locked up in the ice of our poles and glaciers shape the land, influence the weather, and affect the movement of heat, water and salt in ocean currents.

Ball tackles all phases of water, including a few exotic forms that only occur in extreme conditions created in laboratories. That water exists as vapor, liquid, and solid within the fairly narrow range of temperatures that are common on Earth make it unique. This is just one of its unusual properties. The structure of the water molecule is described in the book along with the physics that explain its behavior, to the degree that such things are even known.

Our understanding of water as a compound of hydrogen and oxygen is a relatively recent thing. For a long time, water was thought of as an irreducible element. This makes sense on some level. Water is essential to life as we know it. It is irreplaceable. From the perspective of living creatures, and in almost every culture, water is a fundamental material.

In the final chapter, Ball moves away from the hard sciences to culture, economics and policy. Water of the quality needed for drinking, and even the lesser quality needed for other things, is scarce and unevenly distributed on the planet. To take a serious look at water is to be drawn to issues of health and wealth. Growing population and changing climate will put increased demands on the available fresh water, and we need to consider how we are going to manage it. Ball takes a look at some of the hot spots.

The book is intended for a broad audience. I think it is probably more accessible to someone with some education in the sciences, especially chemistry or physics, but someone had a high-school level class in these subjects they should be able to follow along.

In addition, the book is 16 years old, so necessarily out of date in some respects. I suspect that much of the physics, chemistry and biology described is still sound. Similarly, there is unlikely to be discoveries in history that would seriously outdate the book, even in the interesting section on dead ends and “pathology” in water science.

If you’re interested in this book, you may also be interested in


Ball, Philip. Life’s Matrix: A Biography of Water. 1999. New York: Farrar, Straus and Giroux, 2000.