On Sat, 23 Jul 2022 19:34:21 -0000 (UTC), "Keith F. Lynch" ><kfl@KeithLynch.net> wrote:
I recently read in the Washington Post that Heathrow airport asked
airlines to stop selling tickets for summer departures. So if you
don't already have tickets to get to the Worldcon, you'd better get
them quickly, before all airports do the same.
Also, I heard that Heathrow's runways melted during the recent warm
weather there. I don't know if they've solidified again yet. I'm
curious what they're made of. There are plenty of asphalt roads and >>sidewalks around here, and they never melt even when the temperature >>reaches 40 C (104 F) and they're in direct near-vertical sunlight.
ISTR that in my childhood a few times the asphalt in the street in
front of my house would get soft on some of the hottest days of
summer.
This was in north El Monte, in the San Gabriel valley, east of
Northern Los Angeles.
I recently read in the Washington Post that Heathrow airport asked
airlines to stop selling tickets for summer departures. So if you
don't already have tickets to get to the Worldcon, you'd better get
them quickly, before all airports do the same.
Also, I heard that Heathrow's runways melted during the recent warm
weather there. I don't know if they've solidified again yet. I'm
curious what they're made of. There are plenty of asphalt roads and >sidewalks around here, and they never melt even when the temperature
reaches 40 C (104 F) and they're in direct near-vertical sunlight.
In article <69lodhpr3gnrbl21e0af7otqck0c0p4c27@4ax.com>,
Tim Merrigan <tppm@ca.rr.com> wrote:
On Sat, 23 Jul 2022 19:34:21 -0000 (UTC), "Keith F. Lynch"
<kfl@KeithLynch.net> wrote:
I recently read in the Washington Post that Heathrow airport asked
airlines to stop selling tickets for summer departures. So if you
don't already have tickets to get to the Worldcon, you'd better get
them quickly, before all airports do the same.
Also, I heard that Heathrow's runways melted during the recent warm
weather there. I don't know if they've solidified again yet. I'm
curious what they're made of. There are plenty of asphalt roads and
sidewalks around here, and they never melt even when the temperature
reaches 40 C (104 F) and they're in direct near-vertical sunlight.
ISTR that in my childhood a few times the asphalt in the street in
front of my house would get soft on some of the hottest days of
summer.
This was in north El Monte, in the San Gabriel valley, east of
Northern Los Angeles.
(Hal Heydt)
It may depend on exact composition and what temperatures the
builders anticipate. I was once in Gila Bend, AZ when it was 111F
at 11 PM (it had been 120F during the day). I've also been in
Marysville, CA when it was 122F. In neither case did the streets
melt.
While 104F (or more) is uncommon where I now live (Vallejo, CA),
it's not unheard of and I've never seen problems with the local
paving due to heat.
Also, I heard that Heathrow's runways melted during the recent warm
weather there. I don't know if they've solidified again yet. I'm
curious what they're made of. There are plenty of asphalt roads and >>sidewalks around here, and they never melt even when the temperature >>reaches 40 C (104 F) and they're in direct near-vertical sunlight.
ISTR that in my childhood a few times the asphalt in the street in
front of my house would get soft on some of the hottest days of
summer.
I recently read in the Washington Post that Heathrow airport asked
airlines to stop selling tickets for summer departures. So if you
don't already have tickets to get to the Worldcon, you'd better get
them quickly, before all airports do the same.
I remember times in Indiana in the 60s when the asphalt got soft but
didn't really melt. Tires would leave a slight imprint. Guess airplane
tire would have left quite the imprint.
I recently read in the Washington Post that Heathrow airport asked
airlines to stop selling tickets for summer departures. So if you
don't already have tickets to get to the Worldcon, you'd better get
them quickly, before all airports do the same.
Also, I heard that Heathrow's runways melted during the recent warm
weather there. I don't know if they've solidified again yet. I'm
curious what they're made of. There are plenty of asphalt roads and sidewalks around here, and they never melt even when the temperature
reaches 40 C (104 F) and they're in direct near-vertical sunlight.
Also, I heard that Heathrow's runways melted during the recent warm
weather there. I don't know if they've solidified again yet. I'm
curious what they're made of. There are plenty of asphalt roads and sidewalks around here, and they never melt even when the temperature
reaches 40 C (104 F) and they're in direct near-vertical sunlight.
I recently read in the Washington Post that Heathrow airport asked
airlines to stop selling tickets for summer departures.
Also, I heard that Heathrow's runways melted during the recent warm
weather there. I don't know if they've solidified again yet. I'm
curious what they're made of. There are plenty of asphalt roads and sidewalks around here, and they never melt even when the temperature
reaches 40 C (104 F) and they're in direct near-vertical sunlight.
Also, I heard that Heathrow's runways melted during the recent warm
weather there. I don't know if they've solidified again yet.
On 2022-07-23, Keith F. Lynch <kfl@KeithLynch.net> wrote:
I recently read in the Washington Post that Heathrow airport asked
airlines to stop selling tickets for summer departures. So if you
don't already have tickets to get to the Worldcon, you'd better get
them quickly, before all airports do the same.
Also, I heard that Heathrow's runways melted during the recent warm
weather there. I don't know if they've solidified again yet. I'm
curious what they're made of. There are plenty of asphalt roads and
sidewalks around here, and they never melt even when the temperature
reaches 40 C (104 F) and they're in direct near-vertical sunlight.
The UK had its first 40C temperatures recently and only for one day.
Asphalt is available in various grades and mixtures tailored for specific >conditions. It's unlikely that any UK road was built with 40C temperatures >in mind.
In article <slrntdq2t6.89j.bap@gamma.shrdlu.com>,
Bernard Peek <bap@shrdlu.com> wrote:
On 2022-07-23, Keith F. Lynch <kfl@KeithLynch.net> wrote:
I recently read in the Washington Post that Heathrow airport asked
airlines to stop selling tickets for summer departures. So if you
don't already have tickets to get to the Worldcon, you'd better get
them quickly, before all airports do the same.
Also, I heard that Heathrow's runways melted during the recent warm
weather there. I don't know if they've solidified again yet. I'm
curious what they're made of. There are plenty of asphalt roads and
sidewalks around here, and they never melt even when the temperature
reaches 40 C (104 F) and they're in direct near-vertical sunlight.
The UK had its first 40C temperatures recently and only for one day. >>Asphalt is available in various grades and mixtures tailored for specific >>conditions. It's unlikely that any UK road was built with 40C temperatures >>in mind.
One might suppose that that will change, going forward.
Dorothy J Heydt <djheydt@kithrup.com> wrote:
In article <slrntdq2t6.89j.bap@gamma.shrdlu.com>,
Bernard Peek <bap@shrdlu.com> wrote:
On 2022-07-23, Keith F. Lynch <kfl@KeithLynch.net> wrote:
I recently read in the Washington Post that Heathrow airport asked
airlines to stop selling tickets for summer departures. So if you
don't already have tickets to get to the Worldcon, you'd better get
them quickly, before all airports do the same.
Also, I heard that Heathrow's runways melted during the recent warm
weather there. I don't know if they've solidified again yet. I'm
curious what they're made of. There are plenty of asphalt roads and
sidewalks around here, and they never melt even when the temperature
reaches 40 C (104 F) and they're in direct near-vertical sunlight.
The UK had its first 40C temperatures recently and only for one day. >>>Asphalt is available in various grades and mixtures tailored for specific >>>conditions. It's unlikely that any UK road was built with 40C temperatures >>>in mind.
One might suppose that that will change, going forward.
Maybe, maybe not...it really depends on how the impact, or the perceived >impact, of not doing it compares to the cost. Maybe they change it the next >time the surface is redone. Maybe they don't do it at all and cancel/delay >flights.
It's a lot like the "design for peak" and "100% uptime" problems in IT.
A customer (internal or otherwise) says it's critical that their application >be "100% available" and "never slow down", so we design for that (well,
five or six nines instead of 100%) and tell them the cost. It usually (well, >always so far) turns out that they're willing to tolerate some downtime and >some slowness.
Robert
It's a lot like the "design for peak" and "100% uptime" problems in IT.
A customer (internal or otherwise) says it's critical that their application >be "100% available" and "never slow down", so we design for that (well,
five or six nines instead of 100%) and tell them the cost. It usually (well, >always so far) turns out that they're willing to tolerate some downtime and >some slowness.
Reminds me of the engineers' credo: You can have it fast, good, and
cheep, pick any two.
In article <isrtdh5peq80kl2f6nkdo4s81slql67s4l@4ax.com>,
Tim Merrigan <tppm@ca.rr.com> wrote:
Reminds me of the engineers' credo: You can have it fast, good, and
cheep, pick any two.
(Hal Heydt)
I oncce knew a contract programmer who kept a sign to that effect
up over his desk. I told him he was an optimist.
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