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#engineering

26 posts23 participants0 posts today

#programming #engineering #systems I work sketching graphs of complex systems in canonical #lisp with #mcclim #emacs #eev .
screwlisp.small-web.org/comple

Back of envelope theories of complex systems, as always with my mostly relating to off-hand comments Winograd made in the first page of his Breaking The Complexity Barrier (Again) paper.

What do you think?

Main feature is bootstrapping making these graphs somewhat in terms of themselves metacircularly.

Looks like there's been a big whoopsie in the construction of the Parramatta Metro:

"Inadequate early investigations into the depth of building foundations in Parramatta have brought part of Sydney’s largest metro rail project to a grinding halt, threatening cost blowouts and delays.

"For six weeks, two giant boring machines digging twin tunnels for the $25.3 billion Metro West line have been at a standstill several hundred metres east of the sprawling site in Parramatta’s CBD for a $380 million station.

"The halt has been sparked by concerns about the depth of piles for one of the buildings that forms a major Telstra exchange, which extends for almost a block from Church to Marsden streets.

"Internal documents seen by the Herald show Sydney Metro and contractors were concerned, well over a year ago, about the prospect of one of the 180-metre-long tunnelling machines digging too close to the piles of the multi-storey Telstra building at 213 Church Street.

"They show officials were still unsure last year of the depth of the foundations, and how close they were to Metro West’s planned northern tunnel.

"Sources close to the project who requested anonymity due to the sensitivity of the matter say it raises questions about the failure to carry out adequate geotechnical investigations into the building’s foundations years before the tunnel alignment was chosen."

https://www.smh.com.au/national/nsw/bungle-brings-sydney-s-largest-metro-tunnel-build-to-a-grinding-halt-20250619-p5m8q5.html #nswpol #auspol #train #rail #engineering

Paywall free: https://12ft.io/https://www.smh.com.au/national/nsw/bungle-brings-sydney-s-largest-metro-tunnel-build-to-a-grinding-halt-20250619-p5m8q5.html

The Sydney Morning Herald · Bungle brings Sydney’s largest metro tunnel build to a grinding haltBy Matt O'Sullivan