Other Lineside Signs

Ok, I spent a lot of time on the train recently.  These plates are on most platforms…. funny sliders…. are they plugged in…. what do they mean…. an answer….

 

 

“Datum plates are fixed to structures (platforms, bridges and overhead line masts, etc.) located near the track. The details on the plate specify the relative position of the track, so that it can be monitored for movement.

Figure 6 shows a datum plate identified as chainage point number (C.P.N°) 58. The letters “DN” (on a red background) denote that the information on the plate relates to the Down line. “Offset” is the horizontal distance from the plate to the running edge (“R.E.”) of the nearest rail of the relevant track, in this case 2915 mm. The track is canted at 35 mm. The top of the movable slider block is normally set at the level of the nearest rail. If it is necessary to fix the datum plate at a higher level than the track, the number above the slider block indicates the difference in height between the rail head and the slider block (300 mm in the example illustrated).

A red slider block means that the data on the plate refers to the actual position of the track at the time when the datum plate was installed. A green block denotes a track design position, to which the track should be returned in the event of it moving out of alignment.”

via Other Lineside Signs.

Developing Countries Are Revolutionizing Mobile Banking – Vijay Govindarajan – Harvard Business Review

NPCI’s key innovations are:

Person-To-Person Mobile Banking

Instant, 24/7, 365 days/year operation — the first such remittance solution without the need for cards of any kind, money moves from account to account instantly using mobile as the channel

Works on all mobile phones

Mobile Money Identifier (MMID)

A unique 7 digit number for each account

Enables customers to link same mobile to multiple accounts

Removes chances of wrong transfer resulting from change of mobile numbers and typing errors

Mobile number and MMID combination uniquely points to a bank account

Works on the existing ATM Messaging, Switch and Network, making it easier for banks to adopt this quickly.

via Developing Countries Are Revolutionizing Mobile Banking – Vijay Govindarajan – Harvard Business Review.

Physicists continue work to abolish time as fourth dimension of space

Philosophers have debated the nature of time long before Einstein and modern physics. But in the 106 years since Einstein, the prevailing view in physics has been that time serves as the fourth dimension of space, an arena represented mathematically as 4D Minkowski spacetime. However, some scientists, including Amrit Sorli and Davide Fiscaletti, founders of the Space Life Institute in Slovenia, argue that time exists completely independent from space. In a new study, Sorli and Fiscaletti have shown that two phenomena of special relativity – time dilation and length contraction – can be better described within the framework of a 3D space with time as the quantity used to measure change (i.e., photon motion) in this space.

via Physicists continue work to abolish time as fourth dimension of space.