Thursday, November 20, 2025
Despatch Australian Made World's Largest Battery Ship to Türkiye as Climate Talks Venue
Friday, November 14, 2025
Voices of Singapore
Tuesday, November 04, 2025
History of Singapore Coffee Shops
Wednesday, October 22, 2025
Charging for Electric Trucks
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| Windrose electric prime mover, Photo by Tom Worthington, CC-BY 20 October 2025 |
Thursday, September 11, 2025
Designing Large Drone Weapons Systems in Australia
| Ghost Shark submarines at announcement, Photo by Anduril 9 September 2025 |
At approximately 5.8 m, the Ghost Shark is one third to one quarter the length of the USA's Orca extra-large unmanned undersea vehicle (XLUUV). The Australian vessel has the advantage of being about the size of a standard shipping container, so it can be transported by truck, train, ship or aircraft.
The range and power source of the vessel are classified. A reasonable guess is that initial units are powered by lithium batteries, with a diesel engine, which the Orca has,as a later option. Range is likely to be around 1,000 km, far less than the 10,000 km of the Orca, but still with an endurance of several months. These type of XLUUVs are not built for speed, as evidenced by the bulky shape.
These XLUUVs are likely to be used initially for surveillance, mapping, and patrolling fibre optic cables. They are too small to carry the heavyweight torpedoes used by crewed submarines and too slow for topedio attacks. They are also too small to carry ship or land attack missiles. While minatore torpedoes and missiles are available, the sea mine is likely to be the primary weapon. Australia has already taken delivery of smart sea mines from RWM Italia. These could be laid by the Ghost Shark outside harbours and approaches, programmed to allow civilian to pass, to enforce a blockade.
| Boeing MQ-28 Ghost Bat at 2023 Avalon Airshow, Wikipedia, CC BY-SA 4.0, 5 March 2023 |
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| Ghost Gecko Concept |
A third arm not yet announced for Australia defence is the land equivalent of the Ghosts: a robotic land vehicle. To fill that gap I speculated about a "Ghost Gecko", an Uncrewed Ground Vehicle (UCV) for the Australian Army. This would be derived from the Hawkei four-wheel-drive protected mobility vehicle. The crew cab would be removed, to lighten the vehicle, and lower its profile. In its place would be an Australian made remotely controlled weapons station (RWS), with a cannon and missiles.
The main area for research and development of these platforms is not the hardware. The problem is the level of autonomous control available. Submarines cannot easily communicate when underwater. The Ghost Shark will need to be able to make decisions itself. The Ghost Bat can be communicated with more easily, however ione operator may be controlling multiple aircraft simultaneously, so a level of autonomy is still needed. Land vehicles have fewer issues, except where large numbers are used. These are issues which are addressed in computer and engineering departments of universities world wide, including in Australia.
Saturday, September 06, 2025
Using an Android Phone as a Desktop Computer
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| Equipment to turn phone into a desktop computer, Photo by Tom Worthington, CC-BY, 6 September 2025 |
First I installed Synaptics' free Displaylink for Android app. Then I plugged a Dell power supply, mouse, keyboard and monitor into the docking station. I inserted the USB-A plug of the station into the OTG adaptor and the adaptor into the phone. After some head scratching and rebooting the phone, I was asked if I wanted the display sent to the dock.
The phone display on screen looks like a giant portrait phone display. So I then needed to set the phone to the smallest font, and rotate it to horizontal, so it matched the screen. Within an application, such as web browsing or Google Document, the mouse and keyboard worked fine, like a desktop application. But for moving between applications I used the phone touchscreen. If you need to bash out a book chapter, this would be fine. But you would not be wanting to be working between applications.
The docking station plus power supply is much larger than the phone and there are a lot of cables. This would be fine to leave on a desk, but a nuisance if carrying around. There are smaller adaptors, but do they use DisplayLink? Also the station doesn't charge the phone via the USB cable (there are OTG adaptors which allow you to inject power, but I bought the cheapest one).
Google are working on a desktop mode for Android, currently in Beta for version 16. This will make it much easier to use applications on a large screen. For non-power users, this should be sufficient. You would just plug one cable into your phone and be in desktop mode.
Wednesday, August 20, 2025
Fearless Women in fiction and reality
I am not sure why I am here. I received an invitation via LinkedIn, but not sure who from. While a fan of alternate history war stories but who knows that?
The last time I was perplexed at an author talk they became a best seller.
It was an entertaining and informative talk on how to write and some book excerpts. I suggested crowdsourcing details from fans as John Birmingham did for the Axis of Time aeries.
Friday, August 15, 2025
Voice data wireless modem for a return of the home phone
| TP-Link TL-MR6500v, N300 4G LTE Telephony Wi-Fi Router |
Wireless desk phone
My first option was to buy a 4G wireless desk phone. These look like an old fashioned analog phone, but have a slot for a SIM card and the electronics of a dumb mobile phone inside. These also act as a WiFi hub for home Internet access. They are sold in Australia for seniors, who want the comfort of an old fashioned home phone.I found one online which also has an ethernet socket. Unfortunately when it arrived this did not work on the Telstra network. So I sent it back and tried again. I ordered another model, but the supplier had discontinued it and returned my money.
Wireless Modem with Phone Socket
For my third attempt I purchased a TP-Link TL-MR6500v, which is a slightly more expensive version of the wireless modem I already had. It is about one centimeter wider, and has a RJ-11 phone socket added on the back. The configuration settings allow the socket to be used for Voice over Internet Protocol (VOIP) or Voice Over LTE (VoLTE). VOIP requires purchasing an additional phone service, so calls can be made. However, VoLTE uses the mobile phone account associated with the SIM card inserted in the modem. The phone is then essentially free, with the internet access.
Felix Mobile SIM
My existing Telstra data only SIM worked fine in the new router. This might have been sufficient, if I could make emergency phone calls. However, I was unable to determine, with any certainty, if I could. I tried asking Google, but got conflicting answers.
When I did this search: "Emergency call on telstra data sim", Google AI said yes, I could:
"Yes, you can make emergency calls (000 or 112) on a Telstra data SIM, even if it's a data-only SIM and doesn't have a phone number"
However when I searched on "use telstra data only sim for emergency call", Google AI said no, I couldn't:
"No, a Telstra data-only SIM cannot be used to make emergency calls (like calling 000 in Australia). Emergency calls require a voice service, which is not included in data-only SIM plans."
I solved the problem by replacing the data only SIM with an ordinary voice/data SIM from another provider (Felix Mobile, owned by TPG). This is $5 a month cheaper than the Telstra data only service and like it is shaped to 1.5 Mbps when the data is used up (rather than being cut off).
I plugged the wireless modem into a phone socket on the wall with an RJ-11 cable (cost $1 at a second hand store). The wall phone in the kitchen, which has been unused for more than a decade, then worked (I kept the phone because it covered a large hole a lazy phone installer left). Felix Mobile uses the Vodafone network, which is different to the service I use for my phone, so if one fails, the other might keep working. The phone is powered from the wireless modem, which in turn is powered from an uninterruptible power supply, so it will keep working in a blackout.
Amaysim
The Felix Mobile SIM worked fine for calls and data on my laptop. But it did not work at all for my set top box. I am not using the set top box for video streaming, just downloading the program guide. Even so, it appears Felix don't allow more than one data device connected at a time, the service being intended for a smartphone. I could not find a reasonably priced service with shaped data which also had phone access. So I signed up for a year long Pay As You Go (PAYG) service from Amaysim, which uses the Optus network. This charges by the minute for calls and per megabyte for data. The charges are high, but I will not be calling out from the phone normally and I have switched off data access, using the modem just as an interface to the analog phone. I have replaced the Telstra Sim for data in my old modem. I paused the Felix service, so I still have an account if needed, but am not charged (it is sitting in my dual Sim phone). This is not an elegant solution, but workable.
Friday, July 25, 2025
User Group Alive and Well in Sydney
Greetings from the Sydney Linux User Group (SLUG) meeting at Google Sydney. I haven't been to a Slug meeting for years. It is good to see nothing has changed. The same pizza and soda, the same talk topic made entirely of acronyms and attendees who look like extras from Big Bang Theory.
Slug talks are very technical and practical. This is about advanced software which anyone can use. Tonight was on ZFS, with the speaker admitted not being an expert. They then went into detail, contradicting that. Of course it wouldn't be a Slug meeting without a free software zealot taking the speaker to task and someone pointing out a error. Also 85 is often something incidental which is useful, in this case that Gamma was used to generate the slides.
Backing up, the topic tonight l, is a very boring one, untill something goes wrong and you need it. Several decades ago my email stopped working when someone flew an aircraft into the office complex holding the server. It took days to recover.
Wherever you are in the world there will be a user group for something you use, so go along.
Monday, July 14, 2025
HIR, a play about what?
Yesterday I attended HIR at the New Theatre in Newtown, Sydney. This is a confronting work about a dysfunctional family. An abused wife takes revenge on her husband, a daughter in transition and a son back from war wondering what happened to the family he left. This is not Broadway Bound, being confronting. All performances are good, as is the set, but it is hard work for the audience, with a few laughs. HIR might be a metaphor for current US politics.
Wednesday, June 04, 2025
Google AI Gives Wrong Size Conversion for Shoes
I wanted to convert a shoe size from european to US. So I typed "eu38 shoe size us mens" into Google search. The AI result was: "A EU 38 shoe size for men in the US is typically a size 7 or 7.5. Some sources might list it as 7.5". There was a small image of a chart from Bespoke Unit, next to the text. When enlarged this indicated a EU 38 was a US 6. However, the Wikipedia's "European shoe size conversion", and most other sources, has a EU 38 shoe as equivalent to between US 5.5 and 6.5, which is a long way from a 7.5.
Saturday, May 24, 2025
Everyone looks familiar at the Sydney Writer's Festival
Just been to one free and one paid session at the Sydney Writer's Festival. The wine was expensive and seats few at the bar. It had the atmosphere of "Shut up and write", with budding authors tapping away at laptops.
Sunday, May 11, 2025
Turned on to the Vibrator Play
On a whim today, I went along to the matinee of "In the next room, or the Vibrator Play" at the New Theatre in Sydney. The play, witten in 2009 by Sarah Ruhl was surprisingly thought provoking, as well as very amusing. It is set in victorian era USA. A progressive physician is using the newly invented electric vibrator to treat nervous conditions, while failing to pay attention to his young wife. This allows for some humour about the effect the treatment has, as well as more serious issues of the effects of the narrow lives women were forced to lead. The play runs until Saturday 17 May at the New Theatre, Newtown, Sydney.
The set design by Tom Baderman is lavish, unlike the usual New Theatre austerity. There were some fun effects, with the lights dimming each time the industrial strength vibrator was switched on. Costumes were also lavish, but had to be practical, with several of the cast shedding their outer garments on stage.
Sarah Greenwood stood out in a uniformly good cast. Her american accent was unobtrusive, reminding me of a young Meg Ryan, in one of her quirky rom com roles.
The play seemed to be descending into farce, with people popping in through different doors, catching the characters in compromising positions, but that passed. Also the playwright tried perhaps a little too hard to cram too many social issues into the script. However, this can be treated as simply entertainment, or you can try to catch all the references.
Some elements of the play are stranger than fiction, such as mention of Edison electrocuting assorted animals, to try to discredit his rival Tesla's ACS current electric system.
Sunday, April 27, 2025
Sofa Upgrade Seventeen Years On
Saturday, April 19, 2025
More help points for Sydney Central Station?
Apart from being unable to find any way to summon station staff, I had difficulty describing where I was, being underground away from streets. So I have now installed the Emergency+ app from the emergency services. This includes what3words, which uses 3 words to identify every 3 square meters of the planet.
Thursday, March 20, 2025
Refurbished Dell Latitude E7290 for Teaching with Linux
The e7290 is a slim sleek minimalist machine, which looks almost the same as the e7270. It worked so well I bought another one for a friend and installed Ubuntu on that. The second unit had an illuminated keyboard, and a different generic USB charger. After installing Ubuntu, the computer would only recognise the charger intermittently. There is much written online about problems with USB chargers not being recognised by laptops. The charger worked fine with my other Dell, but neither charger would not work with the new laptop. After much head scratching I decided to work around the problem, old school. The e7290 has an old style Dell DC socket, as well as a USB C socket, for charging. So I ordered a generic DC charger ($22 from MSY), which worked fine (just make sure it has Dell's unusual 7.4 X 5.0mm plug).
Friday, January 24, 2025
Canberra Health System Second First Hand Experience
A few weeks ago I put something in a bin, turned, took a step and my head hit something very hard. I screamed in pain, had a sensation of falling backwards, then the next thing I knew I was lying on my back looking up at someone. They asked "Are you okay?". It was a question I did not know the answer to. I took a few seconds to check I was not bleeding, & my limbs were working. I then slowly got up and introduced myself. I did this to check I still knew my name, which I did. I was remarkably uninjured apart from a bruise on my head & a slight headache. I then saw I had walked into the underside of an overhead concrete set of stairs. I suspect I was a victim of the forced perspective illusion: I had seen the sloping underside of the stairs as a flat ceiling overhead, receding into the distance.
Feeling not too bad I went to lunch, negotiated a parking space and new five year contract. However, several hours later I started to feel unwell. I found I had difficulty turning my head to the side & felt slightly dizzy. This got worse and as it was late at night I went to the Inner North (Dickson) Walk-in Centre. The wait was not too long, but I found myself getting worse. Show into a consulting room I explained what had happened. It was a little difficult to explain I had hit my head on a concrete stairwell, then fallen over. Asked if I was unconscious I couldn't say (eventually I worked out I must have been for ten seconds).
Things got interesting when the nurse took my blood pressure. They looked worried, then went out and got a much bigger machine, took another reading and looked even more worried. At this point ey suggested I needed to go to hospital & with my concurrence called an ambulance (at this point I was in a slightly dissociated state & would have agreed to anything). I was surprised they picked up a phone, dialled Triple-0 and relayed my details by voice. I had assumed they would click a red button on their screen & have my details (which were already entered in the ACT Health computer) sent electronically to the ACT Ambulance Service. Later the ambulance staff relayed my details by radio to the hospital, despite, again, this being part of the same health system.
After a few minutes ,two ambulance personnel turned up and put me on a trolley. Unfortunately there is no curb cut directly outside the the Inner North (Dickson) Walk-in Centre and nowhere to park an ambulance. These are odd omissions for a medical facility. As a result I had to be wheeled along the footpath away from the ambulance, then after a 360 degree turn on the road, back to the ambulance. This was with traffic passing on the road. Some of the paperwork started blowing away and I could see the person pushing my trolley weighing up if they could level me long enough to secure it. We were on a downward slope towards a ramp into an underground carpark, so I had visions of careering down the street like a scene from Mr Bean. Fortunately the officer decided to keep hold of me and collect the paperwork later.
The ride to North Canberra Hospital was surprisingly uncomfortable. This was my second ride in an ambulance (I don't remember much of the first one). I could feel every bump and the corners felt like the ambulance was spinning around (no doubt due to my condition). We arrived at hospital and I was quickly wheeled in and transferred to a bed.
A succession of people asked me what medication I was taking. Unfortunately in my confused state I could not remember. I vaguely knew it was in an app on my phone but I couldn't remember which app (there are three different government systems I have records in). I have extreme difficulty trying to access MyGov, as it requires multi-factor authentication. It turns out the records I needed were in My Health Record, which only needed a thumb scan, but I lacked the presence of mind at the time. What is surprising is that staff at a government hospital don't have access to digital medical records held on government systems, in an emergency.
I was hooked up to beeping machines and had blood taken. Some time later I had a CAT scan. Every hour or so I was asked what were the three things I was asked to remember (I can still remember them). For the first few hours I was in the emergency ward and noticed that no one ever walked slowly. Everyone was walking very briskly, except for those pushing COWs (Computers of Wheels), where they were typing on screen, while pushing the equipment from patient to patient.
My CAT scan came back okay & I was moved to a quieter ward. Unfortunately the gadgets attached to the patients still kept beeping all night. Around dawn I was asked to remember the three things for the final time and discharged. I walked down the hill from the hospital and, with a feeling of weary elation, got on a bus to go home.
Despite the above quibbles, I would like to thank the staff of the Inner North (Dickson) Walk-in Centre, ACT Ambulance Service and North Canberra Hospital for the excellent care I received.









