Welcome to H3 Maths

Blog Support for Growing Mathematicians

Mathematician develops an app to reduce Jet Lag

April11

Danny_forger2In his Research Statement, Mathematician Danny Forger says that he devotes his research to “understand biological clocks”…using “techniques from many fields, including computer simulation, detailed mathematical modeling and mathematical analysis, to understand biological timekeeping.”

Perhaps this is why he has developed an app to reduce jet lag for travellers. “Overcoming jet lag is fundamentally a math problem, and we’ve calculated the optimal way of doing it.” says Danny.

The resultant smartphone app, Entrain, provides customised schedules for the first few days of a trip, instructing the user when to seek out the brightest light and when to draw the curtains. The recommendations may be distinctly antisocial, but Professor Forger says that sticking to the timetable can halve the length of time spent in a zombie-like state. For example, if you were taking a business trip from New York to London, which is five hours ahead, the app promises to shift your body clock within three days — less than the rule of thumb of one day for every hour your bodyclock is shifted.

To achieve this, on the day after arrival you are told to get light from 7.40am until about 9pm, and not after this. On the second day, you are required to rise at 6.20am and turn out the lights at 7.40pm. You may feel like going for an evening walk or meeting friends for a drink, but doing so would spoil the schedule.

On the third day, you should get up before sunrise, about 5am, and stay in the light until 7.20pm, at which point you should retreat to a dark, or at least dim, environment. “You don’t have to be asleep,” the scientists point out. The following day, in theory, you will be fully adjusted. Read the full article here.

by posted under Uncategorized | Comments Off on Mathematician develops an app to reduce Jet Lag    

Comments are closed.

Post Support

Largest number between o and 1 million which does not contain the ‘n’ is 88

 

Rotation SAT Problem: Answer: 4 (see: https://www.youtube.com/watch?v=FUHkTs-Ipfg)

 

Which number has its letters in alphabetical order? Answer: F O R T Y

Hidden Rabbit? Clue: check the trees

How long for the stadium to fill? 45 minutes.

Where are you? the North Pole

Prize Object Puzzle: If Sue does not know where the prize is in the first question, it can’t be under the square. She must have been told it is under another shape. Apply this same logic to Colin. It is then obvious that the prize cannot be under a yellow object. That helps Sue eliminate her yellow shapes. Got the idea?

Algebra Puzzle: Answer = 1

Popular Math Problems Answers: 1, 1

Number of tabs? According to Lifehacker, the ideal number of tabs you should have open is nine. Yes, a single digit. To some, this is like playing a piano and only using a fraction of the notes!

Worst Graph? Where to start. What a visual mess and even some of the lines merge and are impossible to follow. A graph is a visual display of data, with the goal to identify trends or patterns. This is a spider’s web of information which fails to show a clear pattern at all. Solution? Well, different colors would help, or why not group in two or three graphs where trends are similar?

Number of different nets to make a cube is eleven – see this link

Homework Puzzle; The total value of the counters is 486, so halve this to get 243. Now, arrange the counters to equal this amount twice.

The graph on the left (Coronavirus) is for a time period of 30 days, while the one on the right (SARS) is for 8 months! Very poor graphical comparison and hardly relevant, unless it is attempting to downplay the seriousness of the coronavirus?

10 x 9 x 8 + (7 + 6) x 5 x 4 x (3 + 2) x 1 = 2020

NCEA Level 2 Algebra Problem. Using the information given, the shaded area = 9, that is:
y(y-8) = 9 –> y.y – 8y – 9 =0
–> (y-9)(y+1) = 0, therefore y = 9 (can’t have a distance of – 1 for the other solution for y)
Using the top and bottom of the rectangle,
x = (y-8)(y+2) = (9-8)(9+2) = 11
but, the left side = (x-4) = 11-4 = 7, but rhs = y+? = 9+?, which is greater than the value of the opp. side??
[I think that the left had side was a mistake and should have read (x+4)?]

Archives

H3 Viewers



Skip to toolbar