qwezxcrty's comments

Found this after being waked up by my Windows 11 laptop doing some snarky things in the same room.

From the documentation (https://code.visualstudio.com/docs/getstarted/telemetry ) it seems there is a supported way to completely turn off telemetry. Is there something else in VSCode that doesn't respect this setting?

Not sure that is actually the difficult part. For these low vapor pressure elements one can use a sputtering ion source...

Maybe never? Bram Nauta's ISSCC 2024 talk covered this and worth watching.

I was planning to build something similar with a higher budget for a Spellman HVPS, a shielded Oxford Xray tube, and a CMOS flat panel detector.

However, I learned the potential law consequence of irradiating my neighbors if they found out and that the Xray from the planned 1mA, 50kVp system cannot be shielded to an absolutely safe value easily. I decided to put the plan on a indefinite hold.

It may worth mentioning the modern successor of the SOS technology is SOI. A thin film of crystaline silicon insulated from the bulk by a thin film of SiO2 is used for fabrication of the circuits.

I'm doing my PhD there and from time to time need to throw away a few equipment that are genuinely non-reusable (dead lasers, for example) cleaned out from the labs. Then I got to know the recycling center on campus and developed a habit of looking around for things there.

I'm doing some trash dump diving in a swiss university where I'm studying at and got some nice stuff. For example, now I own a small collection of more than 15 photomultiplier tubes. Some nice (frequently in fully working condition) test equipment like a HP modulation domain analyzer (53310A) and some NI DAQ cards also appears seldomly. The 53310A survived like a miracle. Its front panel was buried beneath a CTI compressor that weighs more than 40kg, but it only suffered from minor damage of the case. The CRT is intact!

However I'm not entirely sure if this is legal and will not bring me trouble. Does these stuff still count as university property even if carelessly dumped into the SBB buckets in the recycling center (usually fenced and locked, but can be opened with student cards)?

Try a simulator of a physical calculator. I'm pretty happy with the HP Prime emulator on Windows.

Yes, I use mine HP Prime daily, not only the physical one, but also the emulator on Windows and Android. Mainly for quick and dirty math when developing new research ideas, too heavy for just typing in PowerShell, but not enough for me to bother launching Matlab.

For non-Chinese speakers: one can jump to 01:50 and 02:32 of the original video, the key figures (XRD and resistance) are presented with English captions.

The data look legit although there is a curious dip in resistance in Fig.3(a) between 200K and 250K. Fig.3(b) is also a bit weird as somehow the resistance behaves irregularly with magnetic field strength.

(now Analog Devices)

OXCO is more commonly acronymed as OCXO.

In Beijing the situation may be slightly better as all the major stations are not terminal stations (after 2015). >>> I should had used stations instead of terminals in my original post, sorry for not native English.

I also don't think transiting between stations is particularly difficult, as in most situations there are massive transport lines (S-Bahn and U-Bahn, RER, metro...) connecting them.

Having more than one railway terminals for a city as big as Paris is not unreasonable. There are technical difficulty with connecting the stations as it's not easy to build lines through/beneath the city. A single reasonably sized station also may not have the capacity to handle all the passengers.

In China, most long range railway services are centrally planned (this is not necessary a bad thing here.), but Beijing, Shanghai, Guangzhou, etc. all end up with more than one terminal.

Chinese do use iMessage, although not necessarily deliberately. SMS is very commonly used in China and when a iPhone user want to message to another, the default is to use iMessage instead of SMS. So I did have tens of native Chinese contacts, including my computer illiterate parents, using iMessage back when I was in China and using an iPhone. Also, SMS cost a fee in China for the most popular mobile subscriptions, while iMessage is almost free.

So it is a good question why CCP didn't block iMessage, despite we know that SMS is heavily censored and monitored (see 金盾工程).

I'm curious if Apple is complying with Chinese censorship with iMessage. As far as I know, at least it was usable in China without VPN in 2015.

I consider that is. Unless as most software used to do, show a popup to politely ask me, can it report the crash to vendor.

I agree to some extent, that's why no one put a password to the telnet based LXI SCPI command interface.

But a weak password maybe useful sometimes, to prevent your coworker accidentally connect to the wrong equipment and mess up one's experiment.

Here it's never meant to deter a hostile coworker, in that case one reports to one's superior rather than rely on the password which is always stickered to the scope itself (in my lab).

Most test equipments, ancient or recent, are not expecting their programming interfaces, let it be an analog voltage, GPIB, RS232, USB or LAN, exposed to the public internet and it would be a extremely stupid thing to do so. The maker of them assume that if one is able to operate them, one should know where they should plug the cables in.

These equipments are simply assuming that anyone can access the interface is not hostile. This is a pretty good assumption in most lab settings that I know, unless the operator is so ignorant. This assumption certainly have made my life much easier in the lab, of course, where every LXI test equipments are connected to a isolated LAN. I would say a lot more f*k in the lab if I have to authenticate myself before sending a SCPI command. I'm happy that most test equipment makers do agree with me.

For example, modern Rohde&Schwartz gears running Windows or Linux (FSV, FSW, FSVA, FSUP, SMA, SMC, ZNL, etc.) have VNC or Windows RDP enabled by default, and have a weak default password shared among the series. Keysight ones too (E5071C, DSOX3000T, maybe not on by default but with a supported way). A hostile user can even screw up a LAN connected, damn simple VxWorks based multimeter like Agilent 34410A badly by sending the calibration commands at the wrong time or some backdoor commands (DIAG:xxxx, haven't tried but looks possible).

Slightly off topic, some Chinese test equipment makers are making hackability as a feature, look at Siglent or Rigol scopes. They can (and they are competent enough to) lock down the system with secure boot like some Tektronix ones. However they don't, so that people with less budget can buy a cheaper model and hack for the bandwidth.