What is Hackers' Pub?

Hackers' Pub is a place for software engineers to share their knowledge and experience with each other. It's also an ActivityPub-enabled social network, so you can follow your favorite hackers in the fediverse and get their latest posts in your feed.

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issueใจใ„ใ†็จ‹ใงใ‚‚ใชใ„ใ‘ใฉissueใงใฏใ‚ใ‚‹ๆฐ—ใŒใ™ใ‚‹ใฎใงโ€‹:issue_open:โ€‹ใ™ใ‚‹ในใใ‹ใ‚‚ใ—ใ‚Œใชใ„ใ‘ใฉใ€ใ‚ใ‚“ใฉใใ•ใ„ใฎใงใ‚ใ‚“ใฉใใ•ใ„๏ผˆ๏ผŸ๏ผŸ๏ผŸ

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็งใฎๅ€‹ไบบ็š„ใช็’ฐๅขƒใงใฏ็„กใ„ใฎใ ใ‘ใ‚Œใฉใ€RTX1300ใงIPsecใ—ใŸใจใใซ1.2Gbps้ ญๆ‰“ใกใซใชใ‚‹ๅ•้กŒใซ่‹›ใพใ‚Œใฆใ‚‹

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develop่ฟฝๅพ“ใ—ใŸใ‚‰ใ€โ€‹:www_odamari:โ€‹ใŒใƒซใƒผใƒ—ๅ†็”Ÿใ•ใ‚Œใ‚‹ใ‚ˆใ†ใซใชใฃใŸๆฐ—ใŒใ™ใ‚‹

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๊ฐ€๋ฐฐ์ƒ์ด ์˜ค๋Š˜ ์šฐ๋ฒ„ ์ฟ ํฐ ์•Œ๋ ค์ค˜์„œ ๋ฐ” ์ง์›๋ถ„๋“ค๊ณผ ๋‚˜ ํฌํ•จ 8๋งŒ์› ์„ธ์ด๋ธŒํ•ด์„œ ๋•ํ†ก ๊ฐ์‚ฌ ๊ฒธ ์•จ๋ฒ” ๋Œ€ํ–‰ ๊ฐ์‚ฌ๋กœ ์ˆ  ์ซ™์ซ™ ๋“œ๋ ธ๋”๋‹ˆ ํ๋ฌผํ•ด์ง€์…จ์Œ...

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How much total drag does my truck create while moving down the highway?

Measure it indirectly!

Run cellphone GPS logger at 1-second interval. Get truck up to speed on flat section of highway, put transmission in neutral, foot off the gas. Let the truck slow down 30 - 45 seconds to get a decent number of data points. Make another data run on same section, but opposite direction to average out effects of wind and any slope.

Import GPS log into spreadsheet.

A linear fit gives you a straight line slope...good enough to determine deceleration...then apply that to F = m * a (you need to know truck's weight) Now you know total drag force at one speed.

Total drag is air resistance (varies with square of speed) plus rolling friction (assume it's constant). OK, do a quadratic/polynomial fit. Now you know rolling friction. Subtract from total drag, and you can determine area-drag (Cd * frontal area) of your truck.

(1 of 2)

Linear fit of GPS log data...to determine deceleration, to determine total drag force of truck at a given speed.Quadratic/polynomial fit of same data. Now you can determine the rolling friction (a constant value), and the air resistance (varies with speed squared)...and then you can determine the area-drag (Coefficient of drag multiplied by frontal area) of your vehicle.
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If you are not seeing my posts on Mastodon for long, its because I am made a pariah by moderators of Kolektiva who kicked me out from Kolektiva mastodon server, for "antisemitism", because I made the cardinal mistake of attacking the root of more than a century long Palestine oppression culminating in Genocide.

They kicked me out for reasons I will address

(Audio at end)

@palestinepalestine group @lebanonlebanon group @iraniran group @israelisrael group @anarchyanarchy group @anarchismanarchism group

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Let me introduce you to aceBSD! Yesterday, while I was out grocery shopping, I saw a special offer on a final unit, and I had already been thinking for a while about getting a mid-range laptop to take with me to conferences, on trips, etc. Something small, practical, with an HDMI port, and capable of running at least one of the BSDs decently. After some careful thought, I decided to go for it today.

It's an Acer Swift Go 14 - with an Intel i5, 16 GB of RAM, and a 512 GB NVMe SSD. What I really like is that itโ€™s compact and has a high-definition OLED screen, a good keyboard, and for the rest... weโ€™ll see. I just used Clonezilla to make a backup of the preinstalled Windows (I didnโ€™t even boot into it...) and Iโ€™m now installing OpenBSD. I had to disable VMD (from a hidden BIOS menu) because otherwise the installer wouldnโ€™t detect the NVMe. It also seems to detect the Wi-Fi, but Iโ€™m proceeding with a USB-C Ethernet adapter just to be safe.

I got it at a good price, so this could be the ideal solution. Fingers crossed, andโ€ฆ weโ€™ll see!

I'll keep posting about this adventure, with the hashtag

A smiling man in a light blue shirt stands indoors holding a cardboard box with the Acer logo, indicating it contains a new laptop from the Acer Swift Series. He is posing happily in front of a wooden door with decorative glass panels.
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ใกใ‚‡ใฃใจๆ€–ใ„ใ‚ใงๅฐพใ‚’ๅผ•ใ„ใฆใ„ใ‚‹ใ€ใชใซใซใ›ใ‚ˆ่งฃๅƒๅบฆใฎ้ซ˜ใ„ๅคขใ ใฃใŸ

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Updating my personal site content and once again distracted by Starlight's built-in "I'm feeling lucky" random theme colour generator so... new light theme! ๐Ÿ˜‚ Rep'ing blue jays and Starlight.

(Also, which past version of me wrote the line, "High tech. Low alto." and can I buy her a drink?)

Screenshot of my personal website in light mode: white background with various shades of gold accents such as header, code block background, and page table of contents, and bright blue accents for links, social icons, and website name beside beside a photo of a blue jay I use as my site logo.
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Currently listening to "ZauberwalD.mod" by slash/atd/rpsg from the revision Demoscene party 2025 and had the compulsion on working on/optimizing my Amiga music file (mod, ahx, prt, tfmx fc14... etc) -> UADE -> FLAC -> NAS shell script...

Not really happy with kdialog/dbus interface on FreeBSD, maybe I should look into other script UI dialogs. Anything other than yad or zenity , which could be used instead? Need a yes/no box and a progressbar. Any hint into the right direction more than welcome.

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ๅคข่ฆ‹ใŒๆ‚ชใ™ใŽใฆ่ตทใใฆใ—ใพใฃใŸใ€3ๅบฆใปใฉ็ถšใ‘ใฆๆ€–ใ„ๅคขใ‚’โ€ฆ

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