Category Archives: Online Tools / Apps / Data Sources

online educational resources

There are a ton of articles about online education resources right now, when so many of us are trying to work from home, take care of children, and keep an eye on older relatives all the same time. None of this helps those of us with small children very much. There are a ton of educational materials available, but very young children are still going to need constant attention in order to make the most of them, and you would also need to somehow find some prep time away from the children in order to make the most of them. For most of us, there is almost no time away from the children, and if we get a precious few moments we may want to invest them in our own mental health, maintenance of which is necessary for the children in the long run. The only advice I have there is for adults to take shifts to give each other some down time if possible, and spend that precious limited downtime on things like exercise (outside if at all possible), yoga, meditation, hobbies like gardening or reading things that are fun and not stressful. I am finding the situation moderately stressful, but I recognize it is much harder for lower income people, single parents, people in the medical field, and anyone who is sick or taking care of someone who is sick.

Anyway, now that I have said they are not helpful, here are a few resources I have come across in the last few days. Some of these are Philadelphia-area specific but other cities might have similar things.

To my fellow parents, I really do wish you all the best. To those thinking about becoming parents, being a parent really is a wonderful, rewarding experience on balance. It’s just that if you live in a country without much family or government support, and plan to work full time while raising said children, you should be aware that you are giving up pretty any semblance of personal leisure time for several years until they become more independent.

Google’s pedestrian foot traffic data

The Philadelphia Inquirer has an article showing foot traffic at various locations around the city during the coronavirus shut down compared to average. As might be expected, foot traffic is down pretty much everywhere except grocery stores, where it is up slightly. This matches my personal observations. It doesn’t match the media accounts of crazy lines at grocery stores and big box stores in the suburbs. Maybe this is because in a dense walkable city, we have many small stores instead of a few large stores, and people tend to spread out their shopping over the entire day and week and to buy just a bag or two at a time that they can carry home. There are odd, sporadic shortages, but I have not observed any extreme shortages of basic goods.

The data supposedly come from Google. I tried to find out more about how, where and when Google is collecting this data, and came up short after 15 minutes or so of looking.

Now, I admit that clearly dense cities with a lot of social interaction have their down side right now. The big dense cities are also where the most international arrivals happen, and this factor along with density might be why they are the worst places to be right now. Hopefully they also have the largest medical facilities with the most experienced medical staff, but whatever we have is clearly not going to be enough to help everyone who needs help in the next month or so.

coronavirus simulations

The Washington Post has some interesting simulations that explain why quarantine is not all that effective a strategy, and why aggressive social distancing can be so effective. Basically, by isolating healthy people from each other you can drastically slow down the rate of spread and reduce the number of cases hitting the health care system at any one time to something manageable. These are agent-based simulations with accompanying time series graphs, and I find them pretty intuitive and informative.

sleep optimization

This article is about devices that can supposedly help you get more out of whatever hours of sleep you manage to get. It sound suspicious, but appears to be backed by at least some research and scientific/medical opinion.

One of the most promising techniques to do so works a bit like a metronome counting the brain into the correct rhythms. Experimental participants wear a headset that records their brain activity and notes when they have started to make those slow waves. The device then plays short pulses of gentle sound, beginning in sync with the brain’s natural slow waves, at regular intervals over the night. The sounds are quiet enough to avoid waking the participant, but loud enough to be registered, unconsciously, by the brain.

BBC

One of the devices commercially available is made by Phillips and costs around $370 (I do not get any sort of commission if you click on this link or buy one.)

youcubed

This site is all about fresh ideas for teaching high school math. Apparently a lot of people agree that the traditional U.S. approach of algebra 1, geometry, algebra 2, and calculus is not working. A lot of people seem to think data science is the answer. It sounds okay to me to start with interesting data and then work backward to math theory and systems concepts. I do use geometry pretty much daily in my work, at least concepts like areas and volumes. Are those geometry? I think I originally learned them in high school chemistry class. I almost never use calculus symbols, but I use calculus concepts like rate of change and accumulating and depleting stocks daily. I solve those numerically rather than symbolically. So maybe this is what we should be teaching in high school, then working our way to the symbols for people who really need it, for example the ones who are going to be programming the computers that the rest of us use to solve various problems. A little statistics and probability is a good idea, but even that can be more experiment based and less symbolic at first.

#unblockbikelanes

Just following up on yesterday’s “paint and pray” post about ignorant, unsafe street designs killing people in New York City and Philadelphia. There is a Twitter hashtag called #unblockbikelanes. Maybe the Philadelphia Police and Philadelphia Parking Authority look at it on occasion. Maybe they don’t. Maybe the engineers at the Philadelphia Streets Department will be inspired to learn about safe street design. Maybe they won’t. Either way, it’s indisputable photographic evidence that may eventually have a variety of uses.

https://twitter.com/printtemps/status/702941757009326080

Resources for safe street design:

augmented reality on Google Street View

Google is rolling out some augmented reality features intended to assist pedestrians in Street View.

The feature overlays a live video feed on the map. Directional arrows and street names appear on the video feed to provide more intuitive navigation and give the user a sense of exactly where they are and where they need to go.