Electrical Impedance Tomography (Julie Razak, WISAC)

The following talk on “Electrical Impedance Tomography (EIT)" was delivered by Dr Julie Eileena Abdul Razak during the Wilayah and Selangor Anaesthesia Conference (WISAC) 2023.

This conference was organized by the Department of Anaesthesia and Intensive Care of Hospital Ampang on 18-19 November 2023. In person conference was held at the Everly Putrajaya and was also hosted online via the Google Meet platform.

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Recording setup and post-production: ANAKAYUB

Primary Revision with Dr Omar Sulaiman (Respiratory Part 7)

The following interactive teaching session was conducted by Dr Omar Sulaiman, consultant anaesthesiologist from Hospital Sultanah Aminah, Johor Bahru, Malaysia, on the respiratory system physiology for the Primary Masters in Anaesthesiology and Intensive Care exams revision.

This was conducted on the 19th of July 2024 at Hospital Ampang, Malaysia. The session was conducted predominantly in Bahasa Melayu (Malay).

Don't forget to subscribe for more upcoming videos from this primary revision course. If you like the work done for the channel, you may now show your support by buying Super Thanks in YouTube.

Post-production: Abrar Mohd Shafie
Recording setup, executive producer: ANAKAYUB

Quirks with The MacBook Advantage... The Sleeping of Macs

Regardless of the CPU platform, MacBooks have been known for 1 major advantage over Windows laptops: The ability to put the laptops to sleep, wake up “instantly”, and do it without bugs. However, lately, my 16-in 2019 MacBook Pro on Tahoe (I’ve yet to “upgrade” back to Sequoia) has been having troubles, where no matter how I try to put it to sleep, the laptop would actually remain awake, and I’d found out when I’d remove the hot MacBook out of the bag, with a partially discharged battery.

After some digging and help from Gemini, it seems that Meta’s WhatsApp desktop app seems to override system settings that would allow the laptop to sleep. The laptop would not sleep after following these recommendations:
1) disallowing camera access
2) disallowing media auto-download

No 1 is the problem, as even with camera access restricted here, WhatsApp still has camera access, inhibiting sleep:

I’ve truncated the output from pmset to highlight WhatsApp:

pmset -g assertions
2026-03-24 11:04:19 +0800 
Assertion status system-wide:
   BackgroundTask                 0
   ApplePushServiceTask           0
   UserIsActive                   1
   PreventUserIdleDisplaySleep    0
   SoftwareUpdateTask             0
   PreventSystemSleep             1
   ExternalMedia                  0
   PreventUserIdleSystemSleep     1
   NetworkClientActive            1
Listed by owning process:
   
   pid 3665(WhatsApp): [0x000013c90001a08d] 09:27:40 PreventUserIdleSystemSleep named: "cameracaptured-idleSleepPreventionForBWFigCaptureDevice"  
   

Gemini also suggested running the following, which also doesn’t work, cause WhatsApp would have camera access regardless on launch without a notification:

 tccutil reset Camera net.whatsapp.WhatsApp

 pmset -g assertions
2026-03-24 11:10:36 +0800 
Assertion status system-wide:
   BackgroundTask                 0
   ApplePushServiceTask           0
   UserIsActive                   1
   PreventUserIdleDisplaySleep    0
   SoftwareUpdateTask             0
   PreventSystemSleep             1
   ExternalMedia                  0
   PreventUserIdleSystemSleep     1
   NetworkClientActive            1
Listed by owning process:
   
   pid 3665(WhatsApp): [0x000013c90001a08d] 09:33:57 PreventUserIdleSystemSleep named: "cameracaptured-idleSleepPreventionForBWFigCaptureDevice"  

Based on this, the only way MacBooks can sleep is if WhatsApp is quit prior. After the debacle that is Tahoe, another chink in MacBook’s armor over other laptops.