You plan to grill steaks for yourself, spouse, and kid. Each steak takes 15
minutes per side. Your grill has space for two steaks at a time. How long until
the three of you can sit down to dinner together?
The obvious answer is an hour. First, you grill two of the steaks. At 15
minutes per side, that takes half an hour. Then you grill the third steak.
Another 30 minutes. In all, an hour.
Can you do better?
Sure you can.
Start as you did before, by grilling two steaks simultaneously. But this time, after 15 minutes, do something different: flip one steak (let's call it steak #1), set the other steak aside on a plate, and put steak #3 on the grill. After another 15 minutes, steak #1 is done, plate it. Flip steak #3 and grill that along with steak #2 (uncooked side down). In 15 minutes, all three steaks are done. Total turnaround time? 45 minutes. A 25% improvement over the obvious solution.
Now, there are no tricks involved. The first procedure, which takes an hour, has the following steps:
Steak1.side1 and Steak2.side1 ...cook 15 minutes... Steak1.side2 and Steak3.side1 ...cook 15 minutes... Steak2.side2 and Steak3.side2
...cook 15 minutes...
The second procedure is faster because it involves only three stages instead of four. Now, let's ask: Can you do better than 45 minutes?
You cannot and here's why: The meat needs a total of 90 minutes on the fire (3 steaks times 2 sides each times 15 minutes per side). At most, two steaks can be cooked simultaneously. So the best possible turnaround time is 45 minutes (90 minutes divided into 2).
The two-step described above -- finding a better way and showing that it is the best possible -- lies at the core of a discipline called Operations Research, or OR.
The OR expert straddles business, information technology (IT), and the mathematics sciences. The business world is rich in process environments whose efficiency may be profitably improved. The OR expert transforms the "problem" into models and algorithms that can be programmed on computers to yield usable results. (In our example, we went from the world of backyard grilling to into the abstraction of sequencing "operations".) This process, as much art as science, often needs a judicious synthesis of tools from mathematics, computer science, and statistics.
Our lives are improved by OR every day. To highlight a few examples, using OR,
Utilities generate electricity inexpensively and deliver it reliably to your home,
The postal service and express shippers optimize deliveries and pick-ups on the fly, and
Retailers decide how much of each item to stock, how to price it, and where to display it.
Admiral Mike McMullen, America's current Chairman of the Joint Chiefs of Staff, has often mentioned the importance of his OR background. (Here Adm. McMullen talks about how OR influences his world-view. Note for hard-core Fallows fans: He even mentions China!)
Yet, mentions of OR in the popular press are few and far between. Worse yet, popular media articles covering OR manage to avoid mentioning OR entirely! This points to a severe problem for the profession, which I will take up in a later post.
James Fallows is a national correspondent for The Atlantic and has written for the magazine since the late 1970s. He has reported extensively from outside the United States and once worked as President Carter's chief speechwriter. His latest book is China Airborne.
The Islamic State is no mere collection of psychopaths. It is a religious group with carefully considered beliefs, among them that it is a key agent of the coming apocalypse. Here’s what that means for its strategy—and for how to stop it.
What is the Islamic State?
Where did it come from, and what are its intentions? The simplicity of these questions can be deceiving, and few Western leaders seem to know the answers. In December, The New York Times published confidential comments by Major General Michael K. Nagata, the Special Operations commander for the United States in the Middle East, admitting that he had hardly begun figuring out the Islamic State’s appeal. “We have not defeated the idea,” he said. “We do not even understand the idea.” In the past year, President Obama has referred to the Islamic State, variously, as “not Islamic” and as al-Qaeda’s “jayvee team,” statements that reflected confusion about the group, and may have contributed to significant strategic errors.
The Republican frontrunner has surged in the polls by taking a tough stance on immigration—and if critics want to stop him, that’s what they need to attack.
A new round of attack ads are heading Donald Trump’s way, some from John Kasich’s campaign and the super PAC backing him, and more in the future from an LLC created specifically to produce anti-Trump messages.
New Day for America’s 47-second ad splices together some of the Republican front-runner’s most awkward video moments: his suggestion he might date his daughter, his claim of “a great relationship with the blacks.” The Kasich campaign’s ad turns Dietrich Bonhoeffer’s famous words “nobody left to speak for me” into a warning from one of John McCain’s fellow Hanoi Hilton POWs that a Trump presidency is a threat to freedom. John Kasich’s Twitter account has fired direct personal challenges to the famously thin-skinned mogul.
An entire industry has been built on the premise that creating gourmet meals at home is simple and effortless. But it isn’t true.
I write about food for a living. Because of this, I spend more time than the average American surrounded by cooking advice and recipes. I’m also a mother, which means more often than not, when I return from work 15 minutes before bedtime, I end up feeding my 1-year-old son squares of peanut-butter toast because there was nothing in the fridge capable of being transformed into a wholesome, homemade toddler meal in a matter of minutes. Every day, when I head to my office after a nourishing breakfast of smashed blueberries or oatmeal I found stuck to the pan, and open a glossy new cookbook, check my RSS feed, or page through a stack of magazines, I’m confronted by an impenetrable wall of unimaginable cooking projects, just sitting there pretending to be totally reasonable meals. Homemade beef barbacoa tacos. Short-rib potpie. “Weekday” French toast. Make-ahead coconut cake. They might as well be skyscraper blueprints, so improbable is the possibility that I will begin making my own nut butters, baking my own sandwich bread, or turning that fall farmer’s market bounty into jars of homemade applesauce.
Some conservatives are defying expectation and backing the Vermont senator.
When Tarie MacMillan switched on her television in August to watch the first Republican presidential debate, she expected to decide which candidate to support.
But MacMillan, a 65-year-old Florida resident, was disappointed. “I looked at the stage and there was nobody out there who I really liked. It just seemed like a showcase for Trump and his ridiculous comments,” she recalled. “It was laughable, and scary, and a real turning point.”
So she decided to back Bernie Sanders, the self-described “Democratic socialist” challenging Hillary Clinton. MacMillan was a lifelong Republican voter until a few weeks ago when she switched her party affiliation to support the Vermont senator in the primary. It will be the first time she’s ever voted for a Democrat.
A bipartisan agreement to replace George W. Bush’s signature No Child Left Behind law could pass next month.
In the next few weeks, a bipartisan majority in Congress is likely to pass a law that, in various ways, repudiates the education legacies of both the Bush and Obama presidencies.
House and Senate negotiators last week agreed to a legislative framework replacing George W. Bush’s signature No Child Left Behind law, a landmark reform of K-12 education placing strict federal requirements on states and schools that proved unworkable over time and led to a culture of testing that drew criticism from liberals and conservatives alike. While some federal benchmarks for accountability will remain in place, the new bill gives much more latitude to the states and restricts the ability of the secretary of education to punish or reward them based on their progress.
If you want to annoy a scientist, say that science isn’t so different from religion. When Ben Carson was challenged about his claim that Darwin was encouraged by the devil, he replied, “I’m not going to denigrate you because of your faith, and you shouldn’t denigrate me for mine.” When the literary theorist Stanley Fish chastised atheists such as Richard Dawkins, he wrote, “Science requires faith too before it can have reasons,” and described those who don't accept evolution as belonging to “a different faith community.”
Scientists are annoyed by these statements because they suggest that science and religion share a certain epistemological status. And, indeed, many humanists and theologians insist that there are multiple ways of knowing, and that religious narratives exist alongside scientific ones, and can even supersede them.
Why are so many kids with bright prospects killing themselves in Palo Alto?
The air shrieks, and life stops. First, from far away, comes a high whine like angry insects swarming, and then a trampling, like a herd moving through. The kids on their bikes who pass by the Caltrain crossing are eager to get home from school, but they know the drill. Brake. Wait for the train to pass. Five cars, double-decker, tearing past at 50 miles an hour. Too fast to see the faces of the Silicon Valley commuters on board, only a long silver thing with black teeth. A Caltrain coming into a station slows, invites you in. But a Caltrain at a crossing registers more like an ambulance, warning you fiercely out of its way.
The kids wait until the passing train forces a gust you can feel on your skin. The alarms ring and the red lights flash for a few seconds more, just in case. Then the gate lifts up, signaling that it’s safe to cross. All at once life revives: a rush of bikes, skateboards, helmets, backpacks, basketball shorts, boisterous conversation. “Ew, how old is that gum?” “The quiz is next week, dipshit.” On the road, a minivan makes a left a little too fast—nothing ominous, just a mom late for pickup. The air is again still, like it usually is in spring in Palo Alto. A woodpecker does its work nearby. A bee goes in search of jasmine, stinging no one.
In the name of emotional well-being, college students are increasingly demanding protection from words and ideas they don’t like. Here’s why that’s disastrous for education—and mental health.
Something strange is happening at America’s colleges and universities. A movement is arising, undirected and driven largely by students, to scrub campuses clean of words, ideas, and subjects that might cause discomfort or give offense. Last December, Jeannie Suk wrote in an online article for The New Yorker about law students asking her fellow professors at Harvard not to teach rape law—or, in one case, even use the word violate (as in “that violates the law”) lest it cause students distress. In February, Laura Kipnis, a professor at Northwestern University, wrote an essay in The Chronicle of Higher Education describing a new campus politics of sexual paranoia—and was then subjected to a long investigation after students who were offended by the article and by a tweet she’d sent filed Title IX complaints against her. In June, a professor protecting himself with a pseudonym wrote an essay for Vox describing how gingerly he now has to teach. “I’m a Liberal Professor, and My Liberal Students Terrify Me,” the headline said. A number of popular comedians, including Chris Rock, have stopped performing on college campuses (see Caitlin Flanagan’s article in this month’s issue). Jerry Seinfeld and Bill Maher have publicly condemned the oversensitivity of college students, saying too many of them can’t take a joke.
Prosecutors indict a Chicago police officer for first-degree murder and release a “deeply disturbing” video of the shooting.
Updated at 1:25 a.m on November 25.
The city of Chicago released the dashcam footage of Laquan McDonald's final moments Tuesday evening, one day earlier than they had originally announced. City officials gave journalists a link to a third-party site where they would have a one-hour window to download the six-minute and fifty-three-second video clip. (City officials bizarrely cited “limited bandwidth” as the reason for for the time limit.) The website crashed almost immediately, but DNAinfo Chicago uploaded the entire video to YouTube.
The clip begins with a 45-second disclaimer then shows the police vehicle on which the dashboard camera was mounted travel to the scene. Five minutes and fifteen seconds pass before McDonald first appears, walking in the middle of a mostly empty city street near two other police vehicles. McDonald is walking at a brisk pace while carrying something in his left hand. (Police reports say it was a knife.)
When the birds were reintroduced to New England after a long absence, they chose to live in cities instead of the forests they once called home.
William Bradford, looking out at Plymouth from the Mayflower in 1620, was struck by its potential. “This bay is an excellent place,” he later wrote, praising its “innumerable store of fowl.” By the next autumn, the new colonists had learned to harvest the “great store of wild turkeys, of which they took many.”
Soon, they took too many. By 1672, hunters in Massachusetts had “destroyed the breed, so that ‘tis very rare to meet with a wild turkie in the woods.” Turkeys held on in small, isolated patches of land that could not be profitably farmed. But by 1813, they were apparently extirpated from Connecticut; by 1842 from Vermont; and from New York in 1844.
In Massachusetts—land of the Pilgrim’s pride—one tenacious flock hid out on the aptly-named Mount Tom for a while longer. The last bird known to science was shot, stuffed, mounted, and put on display at Yale in 1847, but locals swore they heard the distinctive calls of the toms for another decade. Then the woods fell silent for a hundred years.