12 ms·

How the Napa Earthquake Affected Bay Area Sleepers

188 points by ismavis 12y ago

chrismorgan 12y ago
Here I am, a resident of Melbourne, Australia, where we never get interesting earthquakes, visiting SF for the first time (staying in Belmont) and they don’t even wake me for the earthquake they evidently put on for my benefit.
- The_Sponge 12y ago
  Hey fellow belmont buddy! Just curious, about how old is the building that you were in when the earthquake hit?
  - SiVal 12y ago
    It's just that Belmont's on bedrock. Take Ralston east toward the bay, out on the landfill a few blocks past Oracle, and you won't be sleeping through it. It shakes like Jello out here.
sschueller 12y ago
Serious question: I wonder if they can track how many people die per year and differentiate between type (car, earthquake etc.).
- minimaxir 12y ago
  That's not the point. Jawbone (and similar devices such as FitBits and Nike FuelBands) can detect whether the user is sleeping or not; this post asserts that the earthquake is the primary cause of the spike in sleep disruption at 3AM, which is a valid and supported hypothesis. As far as I know, these devices cannot detect the cause of death.
  - sschueller 12y ago
    But the device detects movement doesn't it? Is it not able to detect seismic activity or any other force? So if a person was in a car accident or in an earthquake that would be something that can be measured. There are now devices that can tell what exercise you are doing just by being on your wrist.
    - dwild 12y ago
      I don't know much about this device but I guess it doesn't do continuous synchronization. I believe the user need to initiate it which won't happen if he die.
prawn 12y ago
Link currently leads to a 404.
- deleted 12y ago
  [deleted]
camillomiller 12y ago
Am I the only one that's finding a bit upsetting the fact that a single overlooking identity could dispose of people's data like that? I know, I know: all the Up wearers have "enrolled" voluntarily, but I wonder if they really like to be part of a giant anonymous data science experiment. If you can do this with the users' data, you can certainly do the same for more profit-related purposes. Or maybe it's just me, sometimes I just can't ignore the scary within the scientifically cool.
- wamatt 12y ago
  Did they really dispose any of the users data though? It appears they displayed a chart. That graphic, it could be argued, is based on an entirely new data set. So while individual data sets may been used at some point behind the scenes, it's not like those data sets are the ones being disposed.
  - wwwwwwwwww 12y ago
    the issue is that they're collecting this data in the first place. I cant help but wonder how much it would cost to get the sleep records of a competitor of mine - or if it's not for sale, how much the data would be worth on the black market if their servers got hacked. I have doubts this information is being kept as securely as it should be, that's where my concern lies.
    - TeMPOraL 12y ago
      Well, if one is willing to one-up a fellow human like that, one is a bad person. But you don't need Jawbone data to do that, there are plenty other ways. Honestly, the problem in your example isn't the data.
      - forgottenpass 12y ago
        one is a bad person So what? Time and time again things that would make you a bad person are silently accepted as normal or even expected of a business.
thawkins 12y ago
Who else finds this as creepy as hell.
- source99 12y ago
  Who else finds this cool as hell?
  - azunds 12y ago
    Imagine when NSA starts to publish such charts. They have really COOL data.
    - TeMPOraL 12y ago
      Sure they do. And they could do a lot of good with this data.
      - hack_edu 12y ago
        Post-Snowden PSA: Remember, they already have it if they want it.
  - TomAnthony 12y ago
    Me too! I think it is great we have progressed to the point where we can have this sort of insight. :)
- TeMPOraL 12y ago
  Creepy is the new luddism, I think. Seriously, what the hell is so "creepy" about someone knowing your sleep pattern?
  - MadManE 12y ago
    Nobody is saying that the technology is creepy. It's the fact that it's not at all private that's creepy. As Uncle Ben said, "With great power comes responsibility." It's an awesome thing to have the power of "big data" to analyze your life and make better decisions. But "big data" needs to be responsible in how they handle that data (and their users' trust).
deleted 12y ago
[deleted]
bonchibuji 12y ago
Google Cache - http://webcache.googleusercontent.com/search?q=cache:8rhxYGx-uJcJ:https://jawbone.com/blog/napa-earthquake-effect-on-sleep/+&cd=1&hl=en&ct=clnk&gl=fi http://webcache.googleusercontent.com/search?q=cache:8rhxYGx...
antr 12y ago
The fact that Jawbone has this information on their users (yes, I know they say it's aggregated and "anonymised" data) is pretty scary to me. In my opinion, this data should only be visible to each user, and no one else. I really doubt Jawbone users are aware that their UP devices are sending data to third-parties... it feels like 21st century shackles.
- BillFranklin 12y ago
  Total privacy invasion.
- ClassicFarris 12y ago
  At first I thought something along these lines, then I remembered: 1. Google has "trends" when things happen, and "Earthquake" was most certainly googled near/at the time it happened. 2. The phone company has records, which many people texted/called near/at the time it happened. 3. 911 has records and calls were made near/at the time it happened. and so on… So there are private entities and government that have data around the event that can correlate behavior and situations, so it shouldn't seem scary to me… it's just should I have better access to the data? And if I do, what can I tell from the correlation?
  - jsprogrammer 12y ago
    I think it also has to do with what content is being recorded. Intimate sleep data is a bit different than knowing I called 911 for an emergency situation.
    - dohertyjf 12y ago
      Are you saying that the sleep data is more personal than calling 911? I have to question that, because you could call 911 for all sorts of private situations that you wouldn't want publicly known. So no, it's not really different.
      - gknoy 12y ago
dredmorbius 12y ago
Since Jawbone apparently don't know how to post a simple image for old-school browsers: http://blogs-images.forbes.com/dandiamond/files/2014/08/Jawbone.png http://blogs-images.forbes.com/dandiamond/files/2014/08/Jawb... And for those who've noted that the NSA are going to have all the cool data, after seeing this chart, I'm pretty sure they'll start tapping into Jawbone as well.
- lfx 12y ago
  But this is not simple image. This is interactive chart. You can hover lines and get some info via tool tip. Apparently you are using quite old browser, if you don't mind asking you? Since D3js, the lib used to generate SVG, supports majority of browsers[1]. [1] https://github.com/mbostock/d3/wiki#browser--platform-support https://github.com/mbostock/d3/wiki#browser--platform-suppor...
  - dredmorbius 12y ago
    You are correct. I am using an old browser. It does date from the present decade, however. It's not that old. I'm somewhat amused by the number of sites which fail to work properly (some at all) with it. Imgur is entirely dead. Reddit I can read, but moderation and reply buttons don't work. I hit the beta rollout of a news site last night (apparently part of their A/B test) and found that among the features which failed to work was the "opt out of beta" button.
    - bjacobel 12y ago
      So... Update, maybe? I'm sure the web developers of those sites aren't "somewhat amused" by having to try to support your ancient browser. D3 should work in any browser that supports SVG, which is every desktop browser but IE8 [1]. If you're still using IE8, some sites not working is going to be the least of your problems soon - Microsoft isn't patching it anymore. [1]: http://caniuse.com/#feat=svg http://caniuse.com/#feat=svg
      - dredmorbius 12y ago
zaius 12y ago
Interesting data. Some things that jumped out at me: 1. Apparently everyone in Santa Cruz goes to bed early and gets up early. 2. I would have expected bigger jumps on the hour. Maybe I'm the only one that sets my alarm on the hour though. 3. Why would there be dips in the AM? People hitting snooze perhaps? 4. How long do you have to moving for UP to think you're awake? How long do you have to be still for the UP to think you're asleep?
- venus 12y ago
  > 1. Apparently everyone in Santa Cruz goes to bed early and gets up early. Probably some selection bias at work here. It's possible the type of person who's buying and wearing personal fitness monitors is also the type of person who gets up early. > Maybe I'm the only one that sets my alarm on the hour Probably my OCD coming out but I only set my alarm with minutes beginning 0-4 and ending with 8. I'm sure everyone has their own habits. On the hour seems so numerically boring!
  - gmu3 12y ago
    If it was selection bias like that, the same would apply to people in other cities, so it wouldn't explain the difference in the graph. My guess is people in Santa Cruz on average have a longer commute.
    - Lewisham 12y ago
      It's going to be a selection bias of: 1. People who are fit (or want to be) 2. People who are technical (or are interested in quantified life in general) Technical people who commute from SC to Silicon Valley have far less bus options and routes than SF (SC has three each way for Google which ends at 9:25). That forces a lot of the number 2 people awake earlier than they otherwise would be. I think SC is probably the same, if not average getting up later than other Bay Area places, due to the large student population and short walk/bike commute for those who work in the town.
- lukashed 12y ago
  > Maybe I'm the only one that sets my alarm on the hour though. I assume most of the UP-wearers will use the "smart alarm" function on their wristband that will wake them at the "optimal moment" in their sleep cycle.
jobigoud 12y ago
It's unfortunate but almost all Quantified Self devices work like this. You have to go through the device provider website to see your data. I wish there existed more engineer-friendly initiatives where you can install the data collection server, data store and analysis server on machines you control.
- pc86 12y ago
  If these consumer-level devices are $100-200 a pop don't you think that would be prohibitively expensive for a decidedly smaller audience?
jobigoud 12y ago
"All results are statistically significant." Isn't this an overly optimistic claim? Surely people using a sleep tracking device do not form an unbiased sample of the general population when it comes to sleep patterns?
- icebraining 12y ago
  Nobody said it was a study on the general population, only on the UP wearers population.
  - smackfu 12y ago
    OTOH, if their sample size is the same as the population size, their data is by definition statistically significant.
    - minimaxir 12y ago
      Not even that. If the sample size in general is extremely large (irrespective of its proportion to the population size), than the results are statistically significant. A sample size in the thousands counts as "extremely large."
      - acangiano 12y ago
        I think that most people greatly overestimate the sample size needed to achieve statistical significance.
      - jobigoud 12y ago
        Surely the sample, however large, must follow the same distribution than the population distribution? If you sample 1000 insomniacs, how do you get anything significant? My remark was just that, the sample bias has an impact on the significance of the results. I do not know if in actuality people using sleep monitors form a different distribution than the general population regarding sleep patterns, but it seems likely. The title of the article mentions "Bay Area sleepers", so it would seem to me that they do form conclusions about the general population, not just Jawbone wearers.
morsch 12y ago
How useful do you find the sleep tracking to be? I've been using it for a couple of days now and I'm on the fence whether a simple movement tracker can really tell whether I'm in a deep or light sleep phase...
- hack_edu 12y ago
  Think of it comparable the difference between "pop science" and "academic science" in book publishing. Its cool, and usually pretty informative, but largely just for fun or minor utility.
mjs 12y ago
A map version of this (with contour lines for percentage awoken) would be nice. This would also eliminate the small differences in the time people in different areas seem to go to sleep and rise.
batbomb 12y ago
Maybe more interesting is that Santa Cruz/Modesto people are early to bed/early to rise.
- sparkman55 12y ago
  A number of people live in (beautiful!) Santa Cruz but commute over the hill to work in San Jose or elsewhere in Silicon Valley. It's a long commute on a treacherous but crowded mountain highway, so it's no surprise that they need to wake up early to beat traffic.
dohertyjf 12y ago
In response to antr and others talking about how this is "private" data, a few things: 1) Jawbone is a data company. You get what you want from them by giving them your data. Giving them your data is your choice, so if you are uncomfortable with it then you should not have a Jawbone. 2) What's interesting about this article is that it's in aggregate, across a statistically significant (so they say) number of people in these areas. They're not looking at individual stats, and I would bet would have a hard time tracing it back to a single person/name/etc, if they're even allowed to store it that way (not sure, but it would surprise me if they did). If you don't like your data being stored somewhere, why are you even on HackerNews? You know your data is being stored here and being learned from.
- wwwwwwwwww 12y ago
  > If you don't like your data being stored somewhere, why are you even on HackerNews? having my sleeping records and a table of what times during the day that I shit is a lot more sensitive information than the trash I post on hacker news
  - dohertyjf 12y ago
    Once again, if they have your sleeping records it's because you have chosen to give them that data. It's your problem then, not theirs. Also, if you think others care about what time of day you take a shit, you have way too high of a view of yourself.
  - baddox 12y ago
    That is your personal opinion, and it's perfectly valid. I would recommend people with that opinion to not use a Jawbone UP.
deleted 12y ago
[deleted]
lingc 12y ago
Very cool! The text says that 93% of the Napa area woke up, but the graphs shows 74%. I'm assuming the graph is off?
- vamin 12y ago
  The graph is showing how many people are awake. The 93% number reflects the fact that some people were already awake before the quake.
  - lingc 12y ago
    Then according to the graph, 59/85 were awoken from sleep, which is about 71%. 59 awoken = 74 (awake at quake) - 15 (awake before the quake) 85 = 100 - 15 (awake before quake) Maybe they are adjusting for other things that are not shown on the graph.
    - vamin 12y ago
      Good point. I wonder if they are smoothing the data, which would make the peaks less peaky (which brings up another question, what is the time resolution for UP's ability to measure wakefulness?).
- lingc 12y ago
  Never mind. The graph is showing areas based on 25 mile radius, and the 93% is for the 15 mile radius.

188 points by ismavis 12y ago

Here I am, a resident of Melbourne, Australia, where we never get interesting earthquakes, visiting SF for the first time (staying in Belmont) and they don’t even wake me for the earthquake they evidently put on for my benefit.

The_Sponge 12y ago
Hey fellow belmont buddy! Just curious, about how old is the building that you were in when the earthquake hit?
- SiVal 12y ago
  It's just that Belmont's on bedrock. Take Ralston east toward the bay, out on the landfill a few blocks past Oracle, and you won't be sleeping through it. It shakes like Jello out here.

sschueller 12y ago

Serious question: I wonder if they can track how many people die per year and differentiate between type (car, earthquake etc.).

minimaxir 12y ago
That's not the point. Jawbone (and similar devices such as FitBits and Nike FuelBands) can detect whether the user is sleeping or not; this post asserts that the earthquake is the primary cause of the spike in sleep disruption at 3AM, which is a valid and supported hypothesis. As far as I know, these devices cannot detect the cause of death.
- sschueller 12y ago
  But the device detects movement doesn't it? Is it not able to detect seismic activity or any other force? So if a person was in a car accident or in an earthquake that would be something that can be measured. There are now devices that can tell what exercise you are doing just by being on your wrist.
  - dwild 12y ago
    I don't know much about this device but I guess it doesn't do continuous synchronization. I believe the user need to initiate it which won't happen if he die.

prawn 12y ago

Link currently leads to a 404.

deleted 12y ago
[deleted]

camillomiller 12y ago

Am I the only one that's finding a bit upsetting the fact that a single overlooking identity could dispose of people's data like that? I know, I know: all the Up wearers have "enrolled" voluntarily, but I wonder if they really like to be part of a giant anonymous data science experiment. If you can do this with the users' data, you can certainly do the same for more profit-related purposes. Or maybe it's just me, sometimes I just can't ignore the scary within the scientifically cool.

wamatt 12y ago
Did they really dispose any of the users data though? It appears they displayed a chart. That graphic, it could be argued, is based on an entirely new data set. So while individual data sets may been used at some point behind the scenes, it's not like those data sets are the ones being disposed.
- wwwwwwwwww 12y ago
  the issue is that they're collecting this data in the first place. I cant help but wonder how much it would cost to get the sleep records of a competitor of mine - or if it's not for sale, how much the data would be worth on the black market if their servers got hacked. I have doubts this information is being kept as securely as it should be, that's where my concern lies.
  - TeMPOraL 12y ago
    Well, if one is willing to one-up a fellow human like that, one is a bad person. But you don't need Jawbone data to do that, there are plenty other ways. Honestly, the problem in your example isn't the data.
    - forgottenpass 12y ago
      one is a bad person So what? Time and time again things that would make you a bad person are silently accepted as normal or even expected of a business.

thawkins 12y ago

Who else finds this as creepy as hell.

source99 12y ago
Who else finds this cool as hell?
- azunds 12y ago
  Imagine when NSA starts to publish such charts. They have really COOL data.
  - TeMPOraL 12y ago
    Sure they do. And they could do a lot of good with this data.
    - hack_edu 12y ago
      Post-Snowden PSA: Remember, they already have it if they want it.
- TomAnthony 12y ago
  Me too! I think it is great we have progressed to the point where we can have this sort of insight. :)
TeMPOraL 12y ago
Creepy is the new luddism, I think. Seriously, what the hell is so "creepy" about someone knowing your sleep pattern?
- MadManE 12y ago
  Nobody is saying that the technology is creepy. It's the fact that it's not at all private that's creepy. As Uncle Ben said, "With great power comes responsibility." It's an awesome thing to have the power of "big data" to analyze your life and make better decisions. But "big data" needs to be responsible in how they handle that data (and their users' trust).

deleted 12y ago

[deleted]

bonchibuji 12y ago

Google Cache - http://webcache.googleusercontent.com/search?q=cache:8rhxYGx-uJcJ:https://jawbone.com/blog/napa-earthquake-effect-on-sleep/+&cd=1&hl=en&ct=clnk&gl=fi http://webcache.googleusercontent.com/search?q=cache:8rhxYGx...

antr 12y ago

The fact that Jawbone has this information on their users (yes, I know they say it's aggregated and "anonymised" data) is pretty scary to me. In my opinion, this data should only be visible to each user, and no one else. I really doubt Jawbone users are aware that their UP devices are sending data to third-parties... it feels like 21st century shackles.

BillFranklin 12y ago
Total privacy invasion.
ClassicFarris 12y ago
At first I thought something along these lines, then I remembered: 1. Google has "trends" when things happen, and "Earthquake" was most certainly googled near/at the time it happened. 2. The phone company has records, which many people texted/called near/at the time it happened. 3. 911 has records and calls were made near/at the time it happened. and so on… So there are private entities and government that have data around the event that can correlate behavior and situations, so it shouldn't seem scary to me… it's just should I have better access to the data? And if I do, what can I tell from the correlation?
- jsprogrammer 12y ago
  I think it also has to do with what content is being recorded. Intimate sleep data is a bit different than knowing I called 911 for an emergency situation.
  - dohertyjf 12y ago
    Are you saying that the sleep data is more personal than calling 911? I have to question that, because you could call 911 for all sorts of private situations that you wouldn't want publicly known. So no, it's not really different.
    - gknoy 12y ago

dredmorbius 12y ago

Since Jawbone apparently don't know how to post a simple image for old-school browsers: http://blogs-images.forbes.com/dandiamond/files/2014/08/Jawbone.png http://blogs-images.forbes.com/dandiamond/files/2014/08/Jawb... And for those who've noted that the NSA are going to have all the cool data, after seeing this chart, I'm pretty sure they'll start tapping into Jawbone as well.

lfx 12y ago
But this is not simple image. This is interactive chart. You can hover lines and get some info via tool tip. Apparently you are using quite old browser, if you don't mind asking you? Since D3js, the lib used to generate SVG, supports majority of browsers[1]. [1] https://github.com/mbostock/d3/wiki#browser--platform-support https://github.com/mbostock/d3/wiki#browser--platform-suppor...
- dredmorbius 12y ago
  You are correct. I am using an old browser. It does date from the present decade, however. It's not that old. I'm somewhat amused by the number of sites which fail to work properly (some at all) with it. Imgur is entirely dead. Reddit I can read, but moderation and reply buttons don't work. I hit the beta rollout of a news site last night (apparently part of their A/B test) and found that among the features which failed to work was the "opt out of beta" button.
  - bjacobel 12y ago
    So... Update, maybe? I'm sure the web developers of those sites aren't "somewhat amused" by having to try to support your ancient browser. D3 should work in any browser that supports SVG, which is every desktop browser but IE8 [1]. If you're still using IE8, some sites not working is going to be the least of your problems soon - Microsoft isn't patching it anymore. [1]: http://caniuse.com/#feat=svg http://caniuse.com/#feat=svg
    - dredmorbius 12y ago

zaius 12y ago

Interesting data. Some things that jumped out at me: 1. Apparently everyone in Santa Cruz goes to bed early and gets up early. 2. I would have expected bigger jumps on the hour. Maybe I'm the only one that sets my alarm on the hour though. 3. Why would there be dips in the AM? People hitting snooze perhaps? 4. How long do you have to moving for UP to think you're awake? How long do you have to be still for the UP to think you're asleep?

venus 12y ago
> 1. Apparently everyone in Santa Cruz goes to bed early and gets up early. Probably some selection bias at work here. It's possible the type of person who's buying and wearing personal fitness monitors is also the type of person who gets up early. > Maybe I'm the only one that sets my alarm on the hour Probably my OCD coming out but I only set my alarm with minutes beginning 0-4 and ending with 8. I'm sure everyone has their own habits. On the hour seems so numerically boring!
- gmu3 12y ago
  If it was selection bias like that, the same would apply to people in other cities, so it wouldn't explain the difference in the graph. My guess is people in Santa Cruz on average have a longer commute.
  - Lewisham 12y ago
    It's going to be a selection bias of: 1. People who are fit (or want to be) 2. People who are technical (or are interested in quantified life in general) Technical people who commute from SC to Silicon Valley have far less bus options and routes than SF (SC has three each way for Google which ends at 9:25). That forces a lot of the number 2 people awake earlier than they otherwise would be. I think SC is probably the same, if not average getting up later than other Bay Area places, due to the large student population and short walk/bike commute for those who work in the town.
lukashed 12y ago
> Maybe I'm the only one that sets my alarm on the hour though. I assume most of the UP-wearers will use the "smart alarm" function on their wristband that will wake them at the "optimal moment" in their sleep cycle.

jobigoud 12y ago

It's unfortunate but almost all Quantified Self devices work like this. You have to go through the device provider website to see your data. I wish there existed more engineer-friendly initiatives where you can install the data collection server, data store and analysis server on machines you control.

pc86 12y ago
If these consumer-level devices are $100-200 a pop don't you think that would be prohibitively expensive for a decidedly smaller audience?

jobigoud 12y ago

"All results are statistically significant." Isn't this an overly optimistic claim? Surely people using a sleep tracking device do not form an unbiased sample of the general population when it comes to sleep patterns?

icebraining 12y ago
Nobody said it was a study on the general population, only on the UP wearers population.
- smackfu 12y ago
  OTOH, if their sample size is the same as the population size, their data is by definition statistically significant.
  - minimaxir 12y ago
    Not even that. If the sample size in general is extremely large (irrespective of its proportion to the population size), than the results are statistically significant. A sample size in the thousands counts as "extremely large."
    - acangiano 12y ago
      I think that most people greatly overestimate the sample size needed to achieve statistical significance.
    - jobigoud 12y ago
      Surely the sample, however large, must follow the same distribution than the population distribution? If you sample 1000 insomniacs, how do you get anything significant? My remark was just that, the sample bias has an impact on the significance of the results. I do not know if in actuality people using sleep monitors form a different distribution than the general population regarding sleep patterns, but it seems likely. The title of the article mentions "Bay Area sleepers", so it would seem to me that they do form conclusions about the general population, not just Jawbone wearers.

morsch 12y ago

How useful do you find the sleep tracking to be? I've been using it for a couple of days now and I'm on the fence whether a simple movement tracker can really tell whether I'm in a deep or light sleep phase...

hack_edu 12y ago
Think of it comparable the difference between "pop science" and "academic science" in book publishing. Its cool, and usually pretty informative, but largely just for fun or minor utility.

mjs 12y ago

A map version of this (with contour lines for percentage awoken) would be nice. This would also eliminate the small differences in the time people in different areas seem to go to sleep and rise.

batbomb 12y ago

Maybe more interesting is that Santa Cruz/Modesto people are early to bed/early to rise.

sparkman55 12y ago
A number of people live in (beautiful!) Santa Cruz but commute over the hill to work in San Jose or elsewhere in Silicon Valley. It's a long commute on a treacherous but crowded mountain highway, so it's no surprise that they need to wake up early to beat traffic.

dohertyjf 12y ago

In response to antr and others talking about how this is "private" data, a few things: 1) Jawbone is a data company. You get what you want from them by giving them your data. Giving them your data is your choice, so if you are uncomfortable with it then you should not have a Jawbone. 2) What's interesting about this article is that it's in aggregate, across a statistically significant (so they say) number of people in these areas. They're not looking at individual stats, and I would bet would have a hard time tracing it back to a single person/name/etc, if they're even allowed to store it that way (not sure, but it would surprise me if they did). If you don't like your data being stored somewhere, why are you even on HackerNews? You know your data is being stored here and being learned from.

wwwwwwwwww 12y ago
> If you don't like your data being stored somewhere, why are you even on HackerNews? having my sleeping records and a table of what times during the day that I shit is a lot more sensitive information than the trash I post on hacker news
- dohertyjf 12y ago
  Once again, if they have your sleeping records it's because you have chosen to give them that data. It's your problem then, not theirs. Also, if you think others care about what time of day you take a shit, you have way too high of a view of yourself.
- baddox 12y ago
  That is your personal opinion, and it's perfectly valid. I would recommend people with that opinion to not use a Jawbone UP.

deleted 12y ago

[deleted]

lingc 12y ago

Very cool! The text says that 93% of the Napa area woke up, but the graphs shows 74%. I'm assuming the graph is off?

vamin 12y ago
The graph is showing how many people are awake. The 93% number reflects the fact that some people were already awake before the quake.
- lingc 12y ago
  Then according to the graph, 59/85 were awoken from sleep, which is about 71%. 59 awoken = 74 (awake at quake) - 15 (awake before the quake) 85 = 100 - 15 (awake before quake) Maybe they are adjusting for other things that are not shown on the graph.
  - vamin 12y ago
    Good point. I wonder if they are smoothing the data, which would make the peaks less peaky (which brings up another question, what is the time resolution for UP's ability to measure wakefulness?).
lingc 12y ago
Never mind. The graph is showing areas based on 25 mile radius, and the 93% is for the 15 mile radius.