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#mechanism

1 post1 participant0 posts today
Public
Ari [APz] Sovijärvi

Big Guns' backbox bagatelle game sounded somehow off. I investigated and sure enough, all 4 bolts that hold the upkicker mechanism onto the light panel were loose, with two nuts missing completely.

After some cabinet bottom searching and Loctite later it works and sounds as it should.

#pinball#arcade#pinrepair
Public
Philo Sophies

The old and the new #mechanism - part 2
- Explanation attempts for the understanding of the #reductionistic and #positivistic world view -

In this 2nd part of the article, in my opinion, the #complexity of #biological #systems is taken into account and in this respect the #mereological #fallacy in the old #mechanistic #world #view, that the whole is always more than the sum of its parts, is referred to as a #construction #error in #reductionism.

More at: philosophies.de/index.php/2022

The old and the new #mechanism - part 2 - Explanation attempts for the understanding of the #reductionistic and #positivistic world view -
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Ari [APz] Sovijärvi

The Twilight Zone has so much cool stuff for a 90s pin I don't even know where to start, but this magnetic mini playfield has always amazed the players.

It has two player controllable pulsing magnets and the objective is to bounce the ball around to hit the scoring switches behind the rubbers and just before you run out of time, make the top shot to double the score and start a mode.

It's also used in one multiball mode, where the top exit scores the jackpot. You can get multiple balls in this thing at once!

Technically, for a mini playfield, it has a lot of stuff in it. It carries two big magnets, several controlled lights, couple of flashers, in addition to several micro and optical switches. It's also really heavy!

The underside is not bare when it's in the game, there's this cardboard-like cover preventing damage and short from the balls moving under it.

video.apz.fi/w/e7HpWfreTDBPoxx

PeerTubeThe Twilight Zone's mini playfieldBy apzpins
#pinball#arcade#mildlyinteresting
Public
Ari [APz] Sovijärvi

Sometimes you get progress and at times cheapening out backfires.

A lot of classic pins had their playfield slide along wooden rails for when you needed to rest it against the backbox. For some reason, Williams came up with a single hinge version around mid-80s, that caused the playfield to tilt so 1/3 of it was below the cabinet sides. Working on stuff around the back of the playfield was painful to a degree it was just easier to pull the whole playfield from the machine.

The sliding rails introduced in '92 was like a godsent for the people repairing pins. You could pull the playfield out and it'd rest on rails and you could lean it against the backbox at a sane height.

Naturally they tried to cheapen this out by getting rid of the nice sliding rail and just make it slide against grooves CNC'd into the cabinet wood, which was like worst of the two worlds. They must've gotten some feedback, as the next released game used the metal rails again!

video.apz.fi/w/xhtFGRwDLsYfVR5

PeerTubePlayfield rails in No FearBy apzpins
#pinball#arcade#mechanism
Replied in thread
Public
Teixi

As dilettante #neuroscience student, nowadays it is incredible to have #OpenAccess to @thetransmitter #journalism by contributors & editors divulgative style written pieces, with included opinionated voices from global #BrainScience researchers, on broader #NeuroNews & current #HotTopics

Fav Top 3 Reads

1 #Mechanism wtf?
Lauren N Ross & Dani S Bassett, ea:
doi.org/10.53053/YPDW9574

2 #MoodDisorder wtf?
@NicoleCRust ea:
doi.org/10.53053/MHCS4874

3 #FEP wtf?
@Neurograce ea:
doi.org/10.53053/UZNK5581

The Transmitter: Neuroscience News and Perspectives · What are mechanisms? Unpacking the term is key to progress in neuroscienceBy Dani S. Bassett
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💧🌏 Greg Cocks

Preliminary Observations of the 5 April 2024 Mw 4.8 New Jersey Earthquake
--
doi.org/10.1785/0320240024 <-- shared paper
--
doi.org/10.1785/0320240020 <-- shared paper
--
doi.org/10.1177/87552930231215 <-- shared paper
--
[This is ‘unusual’ seismic activity and shaking patterns for this part of the USA, on an ‘unmapped’ fault, and seemingly challenging existing models of earthquake risk in the region; while a 4.8 is not big, it must have been quite a surprise for the people in this heavily populated U.S. Northeast not used to such things (per the paper, the USGS estimated it was felt by some 42 million people.]
#GIS #spatial #mapping #earthquake #risk #hazard #spatialanalysis #model #modeling #NewJersey #USA #geology #engineeringgeology #seismic #USGS #seismology #fault #faulting #Tewksbury #DidYouFeelIt #geotechnical #NIST #remotesensing #InSAR #strikeslip #mechanism #thrust

Map showing the chance of any level of damaging earthquake shaking in 100 years from the 2023 50-State National Seismic Hazard Model.
Photos of Taylor’s Mill taken before and after the 5 April 2024, earthquake.
(a) Topographic map showing a mainshock (yellow star) and seismicity (open circles) across geological units from west‐northwest to east‐southeast: Catskills, Highland, Newark basin, and Atlantic Coastal plain. Ramapo fault trending northeast runs through the epicentral area toward Peekskill, New York (NY) (red lines). Border faults between the geologic units–Highland and Newark basin continue southwest from the epicenter through Pennsylvania (PA). Three large known historical earthquakes, 30 November 1783 M 5.3 New Jersey, 1 September 1895 M 4.1 New Jersey, and 10 August 1884 M 5.5 New York, are plotted by red squares. The 2024 Tewksbury earthquake is ∼20 km west of the 1895 earthquake. (b) Contour map showing mainshock peak ground velocity (PGV) measured on transverse‐component records filtered at 0.3–10 Hz. Stations used for the PGV estimation and Lg relative source time function (RSTF) analysis are plotted as open and gray triangles, respectively.
Geologic map of the epicentral area simplified from Owens et al. (1998) and Drake et al. (1996) draped over topography showing mapped faults (black lines), initial aftershock locations from U.S. Geological Survey (USGS) Comprehensive Earthquake Catalog (ComCat; U.S. Geological Survey [USGS], 2017; downloaded 7 April 2024, at 13:59 UTC; purple circles), and mainshock focal mechanism (see Data and Resources). The location of seismic station BRNJ, which was not recording during the mainshock, is shown by the red square. The New Jersey Highlands, composed of Mesoproterozoic to Ordovician igneous and metamorphic rocks, are shown to the northwest of the white line, and the Newark basin, composed of Mesozoic sedimentary and volcanic rocks, lies to the southeast. Background image is a shaded relief derived from the 10 m National Elevation Dataset (see Data and Resources). Seismicity in inset (gray dots and yellow stars) is from the USGS ComCat (USGS, 2017). The blue rectangle in the inset map indicates the region depicted in the larger figure.
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Ari [APz] Sovijärvi

Time for the mandatory Williams Fire! mechanical fire animation appreciation video. How this worked puzzled me so bad back in the days.

Under the playfield we find a rotating drum with a transparency over it and some lights.

The game came without the graphics over the drum, so what you see here is actually a photo of a friend's couch, printed onto a transparent sheet with a laser printer. The real thing looks pretty much like this.

#pinball#mechanism#mildlyinteresting
Public
💧🌏 Greg Cocks

New Explanation For Siberia’s Permafrost Craters
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news.agu.org/press-release/new <-- shared technical article
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doi.org/10.1029/2024GL108987 <-- shared paper
--
"KEY POINTS
• Surface ice-melt water can migrate downward driven by the osmotic pressure associated with a cryopeg, a lens of salty water below
• Overpressure can cause the frozen soil to crack resulting in mechanical explosion.."
#permafrost #hydrates # Russia #YamalPeninsula #BatagaikaCrater #Siberia #climatechange #geomorphology #mechanism #process #climatechange #methane #thawing #frozen #soil #Yamal #Taymyr #cryopeg #ice #water #hydrology #infiltration #osmotic #pumping #explosion #greehousegas

schematics - Warming causes melting in the active layer, which expands deeper into the permafrost. Meltwater then enters the salty cryopeg through osmosis, causing the expansion of the cryopeg, which cracks the overlying permafrost. When those cracks reach the surface, the rapid decrease in pressure in the cryopeg damages the methane hydrates below and triggers a rapid physical explosion. Images not to scale.
maps and phot insets - Siberian permafrost craters
photo and graphics - (Top) The first observed crater in the permafrost, detected in 2014 in the Yamal Peninsula, Siberia. Source: National Geographic. (Centre) Schematic representation of proposed cryopeg inflation. (Below) 2D Streamlines illustrating flow of water from the surface into the cryopeg (The -axis is an axis of symmetry).
photo - Large craters in the tundra on Russia’s Yamal Peninsula are formed by a combination of warming and osmosis, according to new research in Geophysical Research Letters.
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