Technology, mobile phones: Nexus 4: .aux folder in DCIM

Using technology can lead to continual self-tutoring. The tutor mentions a fact he learned today.

Looking to download some photos from my phone to storage, I found a .aux folder inside the DCIM one. (DCIM means Digital Camera IMages.)

Wondering what the .aux folder contains, I opened it and found a single image relating to many others the kids took years ago while assembling an animation. Yet, why is it there, alone?

I discovered a similar photo to it in the main DCIM, alongside the others from that day. Yet, it’s from a few days later. It’s a mirror image of the one in .aux.

Apparently, when an image is altered, its original may (on some platforms) be stored in a .aux folder, while the changed one replaces its predecessor in DCIM. Such seems to be what happened in this case, anyway.



Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.

Lifestyle, mobile phones: phone cases

Perhaps lifestyle requires more tutoring than anything else – for me, anyway. The tutor relays his experience phone case shopping.

Yesterday I got schooled on how to buy phone cases. I’m interested to share what I’ve learned.

We bought my son a phone that’s been out a couple of months. It’s an Android, a very good phone, but not flashy or brandy.

At a big-box store the clerk told us that, with more generic phones, cases are easier to get from a dedicated phone case seller. The big box places might stock cases for prominent brands and makes, but there are many others that they might not cover very strongly.

Therefore, we went to a kiosk in the Woodgrove Centre mall in search of a case for my son’s new phone. The kiosk is near Boathouse. We didn’t even have his phone with us – no problem. The attendant knew which one it was, and that it had been out for only two months. He had a few choices, including wallets. He also had screen protectors.

I chose a wallet case for my son’s phone, and also got him the screen protector. The attendant wanted to put the screen protector on for us, and told us if we brought him the phone, he would.

Just for kicks and giggles, we asked if he had a case for my phone – a Nexus 4. “Nexus 4?” he repeated. He uncovered a storage box, dug in, and pulled one out. I bought it. Here is my Nexus 4, in its new amazing case:

Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.

Mobile phones: good charging habits

The tutor shares best practices for charging a smart phone.

Most people know that there’s probably a “better” way to charge a smartphone. What is it? Conversely, what are some practices to avoid?

Apparently, the best habit is to keep the battery charge between 50 and 95 percent. Drawing it all the way down, then charging it back to 100%, will degrade it if done often. Doing so once per month might be helpful, but no more. Even then, it’s best not to let it get to zero charge. At the same time, it’s best to stop charging just before 100%.

Heat is an enemy of a smartphone battery. Habitually leaving the phone in a hot car, for instance, will reduce its capacity.

Wireless charging and speed charging are best avoided. Wireless charging can produce heat, which may degrade the battery. Speed charging has a different problem: smartphone batteries prefer being charged, then drawn down, at slow, consistent rates.

Once again: zero charge is to be avoided.


Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.

Home computer use, technology: what is SoC?

The tutor shares a discovery he made while researching Windows 10.

In my June 26 post I began about the possibility of upgrading to Windows 10 from Windows 7. I’ve heard the deadline to do so for free is July 29; with Microsoft encouraging the switch, I continue to research it.

Lately I went to check the system requirements (you can see them here.) The Windows 7 computers I use easily passed; however, what piqued my curiosity was the phrase “or SoC.” I decided to look it up.

Apparently, SoC, in this context, means “system on chip.” Put simply, it means that not only the CPU, but all the other inner devices of the computer sit on the same “chip” (“wafer” might be easier to imagine).

SoC is different from the traditional way computers were designed. Before SoC, the CPU sat on its own chip; wires connected it to the graphics unit, USB controllers, a power management module, internet receivers, etc. The CPU constantly communicated with the other devices to “run” the computer as the user demanded.

In desktop computers, the traditional setup makes sense. Inside the box, there is lots of room. From the wall plug-in, there is lots of power available.

Compared with desktop computers, however, modern smart phones need miniaturization – and minimal power usage. SoC is today’s solution. It puts the CPU, the graphics unit, USB controllers, internet receivers, power management module, etc, on the same “chip”, so there’s no “space between”. At the same time, power usage is reduced, partly because the wiring between the internal devices is much less.

I looked up the ten best tablets of 2016 and found a list here. Then I looked up the CPU for each one; I believe they are all SoC.

I’ll be discussing more about computing devices from a home user’s perspective:)



Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.

Lifestyle: mobile phones: how to create a newline when texting (Android, Nexus 4)

The tutor delivers the goods about how to create vertical space in a text.

I don’t text very often, but much more than before. I’m learning how to do it better.

Whatever message I’m sending, be it a solution on the white board or just a simple text, I like lots of white space: it can be an important organizational tool in messages.

Trying to send a text today, I wanted a blank line between two sentences, but couldn’t see how to do so. The native keyboard on my Nexus 4 doesn’t present a carriage return – at first. Yet, I knew it could be done easily, somehow.

I checked several websites where the question was asked, but not satisfactorily answered for my case. Then, at, I did find the answer – although not until page 2.

On a keyboard like mine, if you hold down the Caps arrow, the smiley face at bottom right converts to a carriage return. On mine, to get the carriage return to stay there long enough to press it, the Caps arrow needs to be tapped twice (it seems, anyway).

Happy texting!

Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.

Lifestyle: texting: long-press for other symbols

The tutor reveals why it might be easier to type x4 on your smart phone than from a desktop keyboard.

Trying to send a text that mentioned a dollar amount today, it seemed that, on my Nexus 4, only the £ currency symbol was offered. Without a dollar sign visible on the keyboard, what was I to do?

From my desktop computer I quickly searched how to get dollar sign on nexus 4 phone when texting, then selected this article. It explains that, with a long-press, other related symbols show up for some keys. I long-pressed the £ sign to find the $ sign in a pop-up menu.

Pressing the 4 key, I received the option 4. Therefore, x4 may be more easily texted from a smartphone than typed from a home desktop. Neat, eh?


Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.