MCO is absolutely necessary: Mathematics of Covid-19
COMMENT | We are right in the middle of the Covid-19 pandemic. As mathematicians, we are concerned about two major issues: (1) What is the prognosis for the current Covid-19?; and (2) How to stop a potential second wave?During the 2009 H1N1 pandemic, we were equally worried about the possibility of a second wave (Koh and Teh, 2011) but fortunately, that did not happen.The extension of the movement control order (MCO) by another two weeks to April 14, 2020, is absolutely necessary to prevent a potential immediate second wave.So, we tried to use some simple calculus to demonstrate how mathematic...
Coronavirus math shows importance of social distancing — and consequences of not doing it
PHILADELPHIA — If you still doubt the crucial importance of avoiding other people, or if you think Philadelphia’s “stay at home” order is excessive, consider this:Without the lockdown in Wuhan, China, where the pandemic started, there would have been 44,214 cases in other Chinese cities through February — instead of the actual number of 27,956, according to a new study led by University of Pennsylvania economist Hanming Fang.“Social distancing and, if an epicenter can be identified, as was the case for the city of Wuhan in China, a lockdown can play crucial roles in ‘flattening’ the daily infe...
The Philadelphia Inquirer
What's the COVID-19 end game?
So, here we are.Pretty much nobody’s going to school, thousands are working from home, stores are struggling to stock their shelves and health officials are scrambling to respond to an unknown number of patients who will be taken ill with COVID-19.Unprecedented actions taken since Wednesday to halt the spread of the coronavirus, from the total shutdown of K-12 school districts to significant curtailment of public gatherings, will surely have significant social and economic costs.Especially hard hit will be those in the service industry who may not get paid in the near future or who must now tr...
The San Diego Union-Tribune
Short-staffed and undersupplied, coronavirus crisis strains Seattle area's capacity to deliver care
SEATTLE — Amid the first signs that the novel coronavirus was spreading in the Seattle area, a senior officer at the University of Washington Medical Center sent an urgent note to staffers.“We are currently exceptionally full and are experiencing some challenges with staffing,” Tom Staiger, UW Medical Center’s medical director, wrote on Feb. 29. He asked hospital staff to “expedite appropriate discharges asap,” reflecting the need for more beds.That same day, health officials announced King County’s — and the nation’s — first death from the coronavirus. Now as cases of virus-stricken patients ...
The Seattle Times
Lori Borgman: We've got your number
We have a number of number people in our family. Sadly, I can’t tell you exactly how many because I’m not one of them. As nonnumber people are prone to do, let’s just round up and say it is a lot.Number people often obsess with remembering historic dates, record-breaking high and low temperatures, anniversary dates, what the water bill was this month compared to the same month last year and what a haircut cost in 1994. For a number person, a really good time is approximating how many shingles are on the roof.My father-in-law was a number guy. He worked as an estimator for General Motors, estim...
Tribune News Service
Elizabeth Warren's dropping out of Democratic race for president, so who will get her votes? It's complicated
DETROIT — In what turned out to be the final rally of her presidential campaign, Elizabeth Warren had some advice for more than 2,000 voters jammed into a giant shed at Detroit’s famed Eastern Market.Instead of tracking the horse race talk and pundit predictions, Warren said they should “cast a vote that will make you proud, cast a vote from the heart.”Her plea may still apply, but another candidate will become the beneficiary after news surfaced Thursday that Warren is ending her campaign following a series of stinging defeats on Super Tuesday highlighted by a disastrous third-place finish in...
These 2 New Jersey sisters have Leap Day birthdays — and so does the doctor who delivered them
If you thought sharing with your siblings was torture, imagine having to share your birthday. Even worse? If your birthday only comes every four years.Welcome to the lives of Chloe and Joelle Davidson, sisters who were born on Leap Day 2012 and 2016, respectively. Chloe is celebrating her official birthday for the second time ever Saturday, turning 8 years old. Blowing out the candles next to her will be her youngest sister, Joelle, who is turning 4 — her first official birthday.“It’s really special,” said Chloe, the third youngest of eight children in the Davidson clan. “But sometimes it gets...
The Philadelphia Inquirer
Heidi Stevens: Katherine Johnson and her 'Hidden Figures' story inspired young people, including a budding astronaut from Chicago, to chase their dreams
I thought about Akosua Haynes on Monday morning, when I read about the death of NASA mathematician Katherine Johnson at age 101.Johnson was a human computer whose exacting calculations launched John Glenn into orbit and, equally important, brought him safely back to Earth. Her work and life remained largely unknown to the public at large until Margot Lee Shetterly published her bestselling book, “Hidden Figures: The American Dream and the Untold Story of the Black Women Mathematicians Who Helped Win the Space Race,” which inspired the 2016 Oscar-nominated movie, “Hidden Figures.” Taraji P. Hen...
Katherine Johnson, legendary NASA Langley mathematician, dies at age of 101
NEWPORT NEWS, Va. — Katherine Johnson, the NASA Langley Research Center mathematician who went from “hidden” to hero in her late 90s, died Monday morning at the age of 101.In the early days of the space program, before the advent of modern computers, Johnson’s precise trajectory calculations – done with pencil and paper, or chalk and blackboard – put John Glenn and other astronauts into orbit and brought them safely home. She was part of a team of “human computers” who inspired Margot Lee Shetterly’s best-selling book “Hidden Figures,” which was subsequently adapted into an Oscar-nominated mov...
Daily Press (Newport News, Va.)
North Carolina is a delegate prize on Super Tuesday. But it's a complicated one
CHARLOTTE, N.C. — Only two states have more Democratic delegates at stake than North Carolina on Super Tuesday. But who will get them?Well, it’s complicated.— It depends not just on how many votes a candidate gets but where he or she gets them.— In a sense, candidates still in the race will be competing with those who’ve dropped out.— And regardless of the primary outcome, so-called automatic delegates — once known as superdelegates — can support whoever they want.“Of course it’s complicated,” said University of Virginia political scientist Larry Sabato. “It doesn’t have to be that complicated...
The Charlotte Observer