The Silicon Underground https://dfarq.homeip.net David L. Farquhar, computer security professional, train hobbyist, and landlord Fri, 13 May 2022 16:41:15 +0000 en-US hourly 1 https://i0.wp.com/dfarq.homeip.net/wp-content/uploads/2018/11/cropped-silicon-underground.jpg?fit=32%2C32&ssl=1 The Silicon Underground https://dfarq.homeip.net 32 32 16321610 Why S traps are illegal in drains https://dfarq.homeip.net/why-s-traps-are-illegal-in-drains/ https://dfarq.homeip.net/why-s-traps-are-illegal-in-drains/#respond Mon, 16 May 2022 13:03:18 +0000 https://dfarq.homeip.net/?p=29288 Are s traps illegal? Why? You may have heard S traps are illegal, without explanation. Or maybe you’ve wondered why you have to make a P trap under your drain when an S trap would be easier. Here’s why S traps are illegal in drains. S traps are illegal because they cause a health and… Read More »Why S traps are illegal in drains

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What is Delrin? https://dfarq.homeip.net/what-is-delrin/ https://dfarq.homeip.net/what-is-delrin/#comments Thu, 12 May 2022 13:03:56 +0000 https://dfarq.homeip.net/?p=28675 Perhaps the most lasting legacy of Model Products Corporation on the history of Lionel trains was its use of a material called Delrin. And their competitors, including Marx and K-Line, quickly started using it too. But what is Delrin, and why was it better than the tried and true stuff Lionel Corporation used? Delrin is… Read More »What is Delrin?

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Are electric lawn mowers quiet? https://dfarq.homeip.net/are-electric-lawn-mowers-quiet/ https://dfarq.homeip.net/are-electric-lawn-mowers-quiet/#respond Wed, 11 May 2022 13:03:03 +0000 https://dfarq.homeip.net/?p=29204 Proponents of electric lawn mowers talk about the sound they make as an advantage. But are electric lawn mowers quiet for real, or is it just marketing talk? How much quieter are electric lawn mowers? An electric lawn mower is noticeably quieter than a gas lawn mower. A normal conversation is around 50 decibels. An… Read More »Are electric lawn mowers quiet?

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Can dogs spell? https://dfarq.homeip.net/can-dogs-spell/ https://dfarq.homeip.net/can-dogs-spell/#respond Tue, 10 May 2022 13:03:31 +0000 https://dfarq.homeip.net/?p=29144 Dogs can learn somewhere between 50 and 250 words or phrases. So that means humans will sometimes speak in code to avoid getting a dog excited. One of the most common forms of code is spelling the words. That works until dogs learn the spelling of those words. Wait. Dogs can spell? Anecdotes of dogs… Read More »Can dogs spell?

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Is Windows XP obsolete or is it retro? https://dfarq.homeip.net/is-windows-xp-obsolete-or-is-it-retro/ https://dfarq.homeip.net/is-windows-xp-obsolete-or-is-it-retro/#respond Mon, 09 May 2022 13:03:19 +0000 https://dfarq.homeip.net/?p=26837 Windows XP is hard to classify. I still remember when it was brand new, and technologically it’s closer to today’s versions of Windows than it is to Windows 98. To my kids, it’s ancient history. But what should we call it? Is Windows XP obsolete? Or is it retrro? Whatever you call it, it shouldn’t… Read More »Is Windows XP obsolete or is it retro?

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How soon is too soon to get another dog? It depends https://dfarq.homeip.net/how-soon-is-too-soon-to-get-another-dog-it-depends/ https://dfarq.homeip.net/how-soon-is-too-soon-to-get-another-dog-it-depends/#respond Thu, 05 May 2022 13:03:31 +0000 https://dfarq.homeip.net/?p=29207 How soon is too soon to get another dog? Unfortunately I have experience in this area. But most dog owners do. And the amount of time I’ve waited varied. Here’s why. Why I once waited a week to get another dog Our longtime companion, Angel, died April 8. And we definitely needed a little time… Read More »How soon is too soon to get another dog? It depends

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Qualys duplicate assets https://dfarq.homeip.net/qualys-duplicate-assets/ https://dfarq.homeip.net/qualys-duplicate-assets/#respond Wed, 04 May 2022 13:03:21 +0000 https://dfarq.homeip.net/?p=29129 One of the most frequent problems people ask me about when doing a health check on their vulnerability management program is duplicate assets in Qualys. If you simply run the tool with the defaults, it is definitely possible to end up with duplicate assets. But with a few configuration changes, you can mostly eliminate this… Read More »Qualys duplicate assets

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Why electric lawn mowers are better than gas https://dfarq.homeip.net/are-electric-lawn-mowers-better-than-gas/ https://dfarq.homeip.net/are-electric-lawn-mowers-better-than-gas/#respond Tue, 03 May 2022 13:03:01 +0000 https://dfarq.homeip.net/?p=29232 Over the course of two decades of home ownership, I’ve gone through several gas mowers. Last year, after my friends bought electric mowers and raved about them, I decided to buy one myself. So are electric lawn mowers better than gas? Let’s look at the pros and cons. Price The upfront cost for a gas… Read More »Why electric lawn mowers are better than gas

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Marx Oak Park station https://dfarq.homeip.net/marx-oak-park-station/ https://dfarq.homeip.net/marx-oak-park-station/#respond Mon, 02 May 2022 13:03:37 +0000 https://dfarq.homeip.net/?p=29219 The Marx Oak Park station is one of three tinplate train stations Marx produced during the post-war era. They replaced an earlier, smaller, and less ambitious station from the pre-war era, and solved more than one problem for Marx. The Marx Oak Park station had a long production run, from around 1950 to 1973. Marx… Read More »Marx Oak Park station

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Lionel 115 station https://dfarq.homeip.net/lionel-115-station/ https://dfarq.homeip.net/lionel-115-station/#respond Thu, 28 Apr 2022 13:03:02 +0000 https://dfarq.homeip.net/?p=29140 The Lionel 115 station is a popular centerpiece for pre-war tinplate layouts. While best suited for standard gauge trains, its design does lend itself to o gauge, and it was one of Lionel’s pre-war designs that went back into production during the post-war era. Its first run lasted from 1935 to 1942, with a revival… Read More »Lionel 115 station

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