Explosion on district line
 

"Roland Perry" wrote in message
...
In message , at 20:05:01 on
Sun, 17 Sep 2017, Charles Ellson remarked:
On Sun, 17 Sep 2017 09:40:01 +0100, Roland Perry
wrote:

In message , at 03:29:35 on
Sun, 17 Sep 2017, Charles Ellson remarked:
But instead of the early grainy, very low res, fuzzy, extended play
VHS
images on worn-out tapes, it's now HD quality, sharp, clear, digital
images. Perhaps some are now 4k video quality?

How many would sir like ?
https://www.cctvcameraworld.com/4k-ip-cameras.html

I wonder how widely installed those are? Most installed cameras are
well
behind the state-of-the-art.

At around 200 squid a time possibly roughly the same good/bad quality
spread among users applies as before when it seemed to be "TV" quality
v. something cheaper ?

The cost of CCTV systems is much more than just a consumer grade camera.
For public surveillance not only is there the backhaul, but they are
often able to pan and tilt, and need much better sensitivity/
illumination than those listed.

Have you actually installed and used those cheapo ones? They are OK for
the passageway down the side of a shop, but not much else.

There's not much point having pan and tilt if you haven't got someone
to operate it; the "do you know this person?" pictures generally seem
to come from fixed cameras.

Tell that to the installers of the tens of thousands of cameras which do
pan and tilt.

The need for moveable cameras is reduced by siting fixed cameras at pinch
points;

The moveable cameras tend to be at strategic points where they can cover
may different routes. The panning and tilting can be automatic on a timer.
Such cameras are more for preventing crime than detecting it.

each moveable camera is likely to augment several fixed cameras depending
on purpose. When you get to the point of needing to track a specific
target then you probably are needing more moveable cameras (and zoom
lenses).

You've been watching too much "Spooks".

I never had a problem with spooks following people on CCTV

It was the way that there was always magically a "new" real person to take
over regardless of the route that the perp took, that was unbelievable.

tim


--
Roland Perry

Explosion on district line
 

wrote in message ...
On Fri, 15 Sep 2017 17:54:43 +0100
"tim..." wrote:
"Basil Jet" wrote in message
...
On 2017\09\15 13:06, tim... wrote:


"Tim Watts" wrote in message
...
On 15/09/17 09:47, e27002 aurora wrote:
On Fri, 15 Sep 2017 08:19:08 +0000 (UTC), d wrote:

Looks like it could be an improvised device, or some builders
chemicals that
overheated. Hopefully the latter but seems unlikely to me.

http://www.bbc.co.uk/news/uk-41278545

There are reports of folks leaving the station with burns on exposed
flesh. It sounds like a chemical reaction. We can but hope it's not
"the religion of piece" proselytizing.


Seen a picture of the device on twitter with wires hanging out.

the device had a timer (apparently)

Maybe LU can find out how one works,
and fit them in their line control offices.

are we meant to understand that comment?

Makes perfect sense to me. LU timetables are just fiction. Someone should
invest in buying the drivers and signalmen some watches at least.

you mean that they don't have them (watches that is)?

And in any case, how does having a timer stop the delay happening in the
first place.

and how does it help fix the problem?

(Yes I do know how to fix it!)

tim

Explosion on district line
 

In message
-septem
ber.org, at 12:34:55 on Mon, 18 Sep 2017, Recliner
remarked:
my question is

did they in fact manage this in the time available before they stopped the
guy at Dover

or

did they just get lucky because he gave himself away, some other way

My interest here (as a tech professional) is in assessing the state of the
art of the technology to do this in 12 hours, where previously it might have
taken them 3 weeks (or more)

It seems he was arrested at Dover on other grounds.

No, or forged, passport/ticket?

Only later did they discover he was wanted fir the attempted bombing.
So they got lucky.

--
Roland Perry

Explosion on district line
 

"Recliner" wrote in message
...
tim... wrote:


wrote in message
...
On Sun, 17 Sep 2017 13:44:03 +0100, "tim..."
wrote:


assuming that he is the actual wanted person and not just some random
person of the correct ethnicity (as in - the Birmingham Six)

I wonder if they identified him as a potential suspect:

a) from a name
b) from facial recognition
c) his general demeanor
d) a failed attempt to travel on false documents

anything else?

tim



I think police methods are now far more sophisticated.

ESP?

My question really is

did they pick him up because they had managed to get a name/face for
the
person they were looking for

or did he give himself away

tim


Look at Train CCTV of man with with bag getting on at station xxx
look at CCTV at station xxx for the time period you expect someone on
that train to have entered the station and see same man with same bag
touching in.
Strike lucky and find he used a registered Oyster card.

Yes I do know how they could have found out the identity of the person

my question is

did they in fact manage this in the time available before they stopped
the
guy at Dover

or

did they just get lucky because he gave himself away, some other way

My interest here (as a tech professional) is in assessing the state of
the
art of the technology to do this in 12 hours, where previously it might
have
taken them 3 weeks (or more)

It seems he was arrested at Dover on other grounds. Only later did they
discover he was wanted fir the attempted bombing. So they got lucky.

Thanks

I had half expected that would be the answer (but had seen nothing to
suggest it was)

tim

Explosion on district line
 

On Mon, 18 Sep 2017 13:39:38 +0100
"tim..." wrote:
wrote in message ...
Makes perfect sense to me. LU timetables are just fiction. Someone should
invest in buying the drivers and signalmen some watches at least.

you mean that they don't have them (watches that is)?

And in any case, how does having a timer stop the delay happening in the
first place.

Because as a couple of hundred people are sitting in a train with a green
light waiting for the relief driver to turn up to take over, perhaps having
an alarm bell in the mess might remind him that he's paid to drive the damn
thing.

Another nice-to-have would be an auto cutoff interval on the PA if the driver
decides he's a budding talk radio host and spends 2 minutes telling us the
bleedin fecking obvious.

--
Spud

Explosion on district line
 

wrote in message ...
On Mon, 18 Sep 2017 13:39:38 +0100
"tim..." wrote:
wrote in message ...
Makes perfect sense to me. LU timetables are just fiction. Someone
should
invest in buying the drivers and signalmen some watches at least.

you mean that they don't have them (watches that is)?

And in any case, how does having a timer stop the delay happening in the
first place.

Because as a couple of hundred people are sitting in a train with a green
light waiting for the relief driver to turn up to take over, perhaps
having
an alarm bell in the mess might remind him that he's paid to drive the
damn
thing.

well having grown up on a route where turns started at the terminus (Morden)
I suppose that I never experienced that problem

But you're right it does happen on the Picc at Acton

But I still don't see that it's down to the individual not knowing the time.
They just do it because they can.

tim

Explosion on district line
 

On Mon, 18 Sep 2017 13:58:21 +0100
"tim..." wrote:
wrote in message ...
On Mon, 18 Sep 2017 13:39:38 +0100
Because as a couple of hundred people are sitting in a train with a green
light waiting for the relief driver to turn up to take over, perhaps
having
an alarm bell in the mess might remind him that he's paid to drive the
damn
thing.

well having grown up on a route where turns started at the terminus (Morden)
I suppose that I never experienced that problem

Congratulations, you had utl post 80000 on the aioe server :)

But you're right it does happen on the Picc at Acton

And arnos grove and no doubt rayners lane too.

But I still don't see that it's down to the individual not knowing the time.
They just do it because they can.

Well thats probably true unfortunately.

--
Spud

Explosion on district line
 

On Mon, 18 Sep 2017 13:36:47 +0100, "tim..."
wrote:



"Roland Perry" wrote in message
...
In message , at 20:05:01 on
Sun, 17 Sep 2017, Charles Ellson remarked:
On Sun, 17 Sep 2017 09:40:01 +0100, Roland Perry
wrote:

In message , at 03:29:35 on
Sun, 17 Sep 2017, Charles Ellson remarked:
But instead of the early grainy, very low res, fuzzy, extended play
VHS
images on worn-out tapes, it's now HD quality, sharp, clear, digital
images. Perhaps some are now 4k video quality?

How many would sir like ?
https://www.cctvcameraworld.com/4k-ip-cameras.html

I wonder how widely installed those are? Most installed cameras are
well
behind the state-of-the-art.

At around 200 squid a time possibly roughly the same good/bad quality
spread among users applies as before when it seemed to be "TV" quality
v. something cheaper ?

The cost of CCTV systems is much more than just a consumer grade camera.
For public surveillance not only is there the backhaul, but they are
often able to pan and tilt, and need much better sensitivity/
illumination than those listed.

Have you actually installed and used those cheapo ones? They are OK for
the passageway down the side of a shop, but not much else.

There's not much point having pan and tilt if you haven't got someone
to operate it; the "do you know this person?" pictures generally seem
to come from fixed cameras.

Tell that to the installers of the tens of thousands of cameras which do
pan and tilt.

The need for moveable cameras is reduced by siting fixed cameras at pinch
points;

The moveable cameras tend to be at strategic points where they can cover
may different routes. The panning and tilting can be automatic on a timer.
Such cameras are more for preventing crime than detecting it.

each moveable camera is likely to augment several fixed cameras depending
on purpose. When you get to the point of needing to track a specific
target then you probably are needing more moveable cameras (and zoom
lenses).

You've been watching too much "Spooks".

No, I've been working in one of many areas where that is exactly what
is done when an offender leaves the scene of their crime. They're
generally too thick to go off down a side street so we've often
watched the police with us just waiting for them to walk/run past.

I never had a problem with spooks following people on CCTV

It was the way that there was always magically a "new" real person to take
over regardless of the route that the perp took, that was unbelievable.

Explosion on district line
 

On 18/09/2017 13:34, Recliner wrote:

It seems he was arrested at Dover on other grounds. Only later did they
discover he was wanted fir the attempted bombing.

"They" would say that, wouldn't they...?

--
Arthur Figgis Surrey, UK

Explosion on district line
 

In message , at 18:47:06 on
Mon, 18 Sep 2017, Charles Ellson remarked:

The moveable cameras tend to be at strategic points where they can cover
may different routes. The panning and tilting can be automatic on a timer.
Such cameras are more for preventing crime than detecting it.

each moveable camera is likely to augment several fixed cameras depending
on purpose. When you get to the point of needing to track a specific
target then you probably are needing more moveable cameras (and zoom
lenses).

You've been watching too much "Spooks".

No, I've been working in one of many areas where that is exactly what
is done when an offender leaves the scene of their crime. They're
generally too thick to go off down a side street so we've often
watched the police with us just waiting for them to walk/run past.

How are the police alerted to the flight of the alleged offender so
soon?

Meanwhile, I was looking at one of the pan/tilt cameras on a street
corner (T-junction) earlier today, and it simply cycles between each of
the three directions every 15-20 seconds.
--
Roland Perry