Mambo!
(That means “hi/how are you?”. The standard reply is “poa”, which means “cool”.)
Thanks for sticking around for the third edition of my blog! A lot has happened here in the past couple weeks, so let me fill you in!
Technical Updates
With the travel incubator, we’ve continued to do heater testing with a bunch of different setups. The main thing we’ve focused on is the physical layout of the fan, material layers, and lid. We’ve learned that airflow control is extremely important for heating, and also that even within a small volume, temperatures can vary significantly depending on whether you’re close to the top or near the middle of the incubator, because hot air rises. During our testing we managed to fry one of the heating elements we were using (Figure 1). We also did some preliminary testing on thermal insulation (Figure 2) for whether it would improve the heating efficiency of our system, and it worked to make our heating coils noticeably hotter.
Figure 1: We now know that our heating elements should not glow. This is a sign that mistakes have been made.
Figure 2: Lining the incubator box with insulatingmaterial to trap more heat.
Beyond physical testing, we improved the software side of the incubator to read data from a heart rate/pulse oximeter sensor, along with expanding the display’s functionality to include control for both fan and heater systems. Our current thicket of wires is shown below (maybe we can consider it a form of modern art?). Luckily for us, we won’t have to look at this chaotic little disaster for much longer. I spent most of today designing a printed circuit board (PCB) to which all the necessary components can be soldered

Andy Corliss, 2025.
Jumper cables on various electrical components.
We also had the chance for a couple hospital visits. Last week, we bajaji’d to Amana Referral Hospital to introduce and get feedback on our projects with teams of doctors. There was lots of interest in the gastroschisis bag, with one doctor asking when she’d be able to use it in a clinical setting. Right now, the project is in the patent and manufacturing stage, so it won’t be too long before the gastroschisis bag is in use!
Several doctors in the pediatric section of the hospital were interested in the travel incubator project, and they brought insights that we haven’t even considered, such as making a single incubator that can fit multiple babies inside. We have been brainstorming around this idea while we continue to pursue the single-baby model.
The second hospital visit was today, at the Aga Khan Hospital. We met with a neonatologist named Dr. Yaser Abdallah, and he was admittedly skeptical of both the gastroschisis bag project and the travel incubator project. While there is a clear need for gastroschisis bags in Tanzania, he believes that the best way to get these bags is to import them. As for the travel incubator, he believes that the vast majority of babies should be cared for via Kangaroo Mother Care (KMC), in which the baby is held by the mother on her chest for maximal skin-to-skin contact. While it was a little difficult to hear that he didn’t think our projects would make an impact, Dr. Abdallah’s perspective is extremely valuable and we will continue to consider the points he brought up.
As for the syringe pump, we got a hold of different syringe sizes to test with and have begun iterating different 3D printed designs to be able to adapt to these sizes. As I type this post, one of the DIT Design Studio 3D printers is spending its Friday night hard at work on a dummy device casing that we’ll be using to house our prototype iterations.
Figure 4: (left) 3D printed syringe guide above a standard 60 mL syringe (right) syringe pump prototype: the top view shows the different protrusions that are meant to house and guide the syringes.
Next week will involve rapid prototyping of different syringe guides for the syringe pump, and fabricating and assembling the PCB for the travel incubator. We’ll also likely have another hospital visit. There’s lots to do, and somehow we’re already halfway through! Time really does fly when you’re having fun 🙂
Miscellaneous Updates
I think it’s critical to share that I spelled out RICE at a beach resort in the Kigamboni district of Dar es Salaam. Photo credit: Shreya (she was very patient, even as I wasted countless attempts flailing into illegible shapes)
Equally important is my success in an eating challenge at the Grand Restaurant in which I won a t-shirt. Photo credit: Melissa
Shreya and I watched the season champion deciding match of the Tanzanian premier league a couple days ago. What a rowdy experience!

Hopefully Shreya and Melissa can provide some better pictures of the monkeys we saw in Jozani Forest, Zanzibar this past weekend. All I have to offer is a selfie of dubious quality.
Me (basketball star) dunking on Prison Island tortoise (embarrassingly bad defender) in Zanzibar. Photo credit: Shreya, Hoop credit: Melissa
Melissa said that Zanzibar’s waters look like Taco Bell’s Baja Blast. She’s onto something.
The most surprising thing about Stone Town, Zanzibar, was the copious amounts of stray cats. They were everywhere, even in the lobby of our hostel!

Thanks to everyone who made it this far! Either your attention span is commendable, my writing is extremely engaging, or you’re being forced to read this against your will.
In any case, I’ll post again in two weeks, so be ready!
Until then,
Andy