Sunday, November 10, 2024

Pocket Travel Router & Repeater for the Win

A coworker who was visiting San Diego in September mentioned that he always travels with a pocket-sized travel router so I decided to check one out on Amazon. I'm impressed; especially since it cost less than $40 with tax and shipping and it was delivered in under three hours.

I'm simply using mine as a WiFi repeater to deliver connectivity to a dead spot at home and it's working magnificently. It is ideal for using at a hotel so you and your fellow roommates don't need to keep logging into the hotel room's WiFi. And it's especially useful on a cruise ship or airline flight where guests are charged for Internet access for each device. Simply pay for connecting one device, the travel router, and then everyone else in your stateroom can connect it. 

To use it, you log into it, like a typical router or cable modem, and then connect it to your current home (or hotel, etc) WiFi network (you can also use ethernet or tether it to your phone’s hotspot). Once it's set up, it creates its own WiFi network so multiple people can connect to the travel router without needing to log into the hotel’s network.

Saturday, November 9, 2024

iPhones Running iOS 18.1 Automatically Reboot and Lock Down After Being Idle for 96 Hours

This is an interesting new iPhone feature that causes an iPhone to automatically reboot if it's turned on but hasn’t been unlocked for 96 hours.

The thinking is that if your phone is taken from you then it’s harder to hack after it reboots, which is completely true.

Law enforcement has recently encountered this new feature from iPhones they’ve confiscated. The phones that law enforcement have been storing were inexplicably rebooting after 96 hours.

How It Works

When you turn on your iPhone, after it’s been completely powered down, or reboot it, your keys are still encrypted. Entering your six digit PIN unlocks the keys.

This is why, after you turn a phone on, but don’t unlock it, phone calls or text messages don’t display the names of who they’re from on the Lock Screen - rather the notifications simply show the phone number of the sender. The iPhone can’t decrypt a lot of things, like your address book, until you enter your PIN after turning it on or rebooting.

Once you unlock your iPhone for the first time, all the keys are decrypted and kept in memory until the next time you reboot the phone.

Saturday, October 12, 2024

Pair Programming with 3Blue1Brown

For years, I've followed the fantastic videos created by Grant Sanderson of 3Blue1Brown. His videos cover math related topics such as linear algebra, quantum computing, neural networks, and physics. 

I just watch his latest video where he pair programs with Ben Sparks while explaining to Sparks how he developed a custom Python library for his video renderings.

What struck me about this video is it reminds of how gammers record and replay massively multiplayer games for others to watch.

Sanderson and Sparks essentially do the same thing, as Sanderson walks through his code and even uses ChatGPT to write some of it, saving him time. Enjoy.


Wednesday, October 2, 2024

Mind Blowing AI Podcast Creation

This podcast was created for free, entirely by an AI based on approximately 1,200 words of text: http://joemoreno.com/patriotism.mp3

Everyone I’ve shared this with has been absolutely amazed.

Those two voices, in this podcast, are completely AI generated. The source of the text the AI used was this blog post from earlier today.

Try It Yourself

Here's how I did it (you'll need a Google/Gmail account).

1. I visited Google's NotebookLM AI at: https://notebooklm.google.com

2. I clicked the Create button.

3. I then uploaded the text of my document.

4. Under the "Audio Overview" I clicked on the Generate button to create the "Deep dive conversation" with two hosts. It took a few minutes to complete and then I downloaded the WAV sound file. I added one additional, unnecessary, step of converting it to an MP3 using the Apple Music app on my Mac (formerly known as the iTunes app).

Ta-da. That's all there is to it.
Since this is generative AI, every time you use the same content to generate a new podcast, you'll get a different result.

Use Cases

I'm thinking of other uses for this such as turning a long article into a podcast to listen to during a commute or perhaps some work related reading that you can listen to as a podcast while commuting. 

Patriotism: Leadership & Politics


What is a patriot?

A patriot is a citizen who demonstrates love and respect for America by upholding the rule of law. It is fundamentally un-American to violate these principles and values as established by the Constitution (not religion).


You cannot be a patriot unless you respect the Constitution while following the law. Supporting someone who doesn’t follow these principles would be unpatriotic. Our Constitution is what makes America, America.


You can love America yet still not respect America by being a selfish scofflaw. Knowingly parking your car in a handicap spot and paying the fine shows a lack of respect for the law compared to simply parking legally. It’s not ok to break the law, even if you’re willing to pay the price.


A man can love his wife yet still not respect her.

A man can be a seemingly great parent, citizen, worker, etc. But if he constantly cheats on his wife, then there is neither respect nor commitment to the marriage. Infidelity violates the fundamental principles of marriage.


Let’s break down the difference between principles and values.


The Supreme Law Of The Land

The Constitution embodies America’s principles. It is the supreme law of the land.


Laws implement the Constitution’s principles as America’s values.


Think of principles as the lay of the land. They are virtually unmovable.


Think of values as implementing principles. Laws codify principles as values.


If you think of terrain features on the surface of the Earth as principles, then a map represents values. There are different kinds of maps.


Some maps highlight roads and highways for automobile drivers; certain maps focus on terrain, with contour lines for hikers or mountain climbers; some show water depth and hazards for sailors and divers; while other maps point out towers, radio beacons, and buildings for pilots.


All of these maps depict the same geographic area (principles) but they highlight different features (values).


Having a map for the wrong area is not helpful no matter how much you want it to work in your favor. A map of New York City does you no good in Los Angeles. The values a drill instructor instills in recruits during boot camp differ from those a parent imparts to a toddler, yet both align with the principles of the Constitution.


If a law conflicts with the Constitution, then the law either needs to be struck down or else the Constitution needs to be amended. Maintaining a law that conflicts with the Constitution is toxic and dysfunctional.


Oliver North: A Personal Journey in Ethics

Shortly after I enlisted in the Marines, news of the Iran–Contra Affair broke in the fall of 1986. The following year, Congress held hearings to get to the bottom of the matter. It was concluded that Lieutenant Colonel Oliver North – a highly decorated Marine officer who attended the Naval Academy – illegally sold arms to Iran and funneled that money to support the Contras. The Contras were Nicaraguan rebels fighting against the Sandinistas who were the political group in control of Nicaragua. The Sandinistas had policies aligned with the Soviet Union and were considered a Cold War threat to the United States. Contras good. Sandinistas bad.


During the Iran-Contra Hearings in Congress, LtCol Oliver North, as the key witness, was hailed as a celebrity for standing up to Congress, looking them in the eye, and taking full responsibility for the affair.


This seemingly brave and bold sense of patriotism and accountability would have a big impact on me, personally, when I attended the Naval Academy a few years later.


In the 1980s, I, too, hailed Oliver North as a hero, until I learned the fundamental flaws in his unethical and illegal practices.


This doesn’t mean that North didn’t accomplish truly patriotic acts that contributed to the nation’s well-being before or after the Iran-Contra Affair. But it does mean that his actions that led to this affair were misguided – a vigilante patriotism devoid of checks and balances.


During the hearings, Oliver North was asked if he received any ethics training while at the Naval Academy. After answering in the negative, a mandatory semester course was required for all Naval Academy Midshipmen (students). This ethics course was the most impactful class I took at the Academy. Second only to the Naval Academy’s course, Law for the Junior Officer.


Taking this ethics course gave me a clear understanding of North’s legal and ethical violations. Not only did he break the law, but he also lied to Congress about it. It is important to keep in mind that North’s power and authority as a military officer was bestowed upon him by Congress – the very institution he intentionally deceived.


This is the equivalent of a child being given permission by their parents to go outside to play until a curfew time. But, while out and about, the child commits vandalism and returns home late. Then, when questioned by their parents, they lie about coming home after curfew and also deny the vandalism.


The People empower the government and the government empowers certain people with authority to act on behalf of the government. In my Naval Academy ethics course, I learned how to follow a clear line of power, authority, and justice. This line originates with the Constitution and flows through the three branches of government by way of laws, codes, policies, regulations, and ethics, ultimately defining the actions allowed or restricted for both citizens and the government.


At the Naval Academy, many things we learned could be effectively summarized in soundbites.

What’s the most important leadership trait? Set the example.

When asked in an engineering class at the Academy, "Why is something a certain way?"—like, "Why are there two turbines instead of one in a ship’s steam cycle?"—the answer was simple: Because it’s more efficient.


Unethical behavior can also be succinctly summarized as a sound bite: Committing or soliciting an illegal act or the intention to deceive or not let the whole truth be known (with a few, clearly defined exceptions).


Leadership and The People

In leadership, I learned that followers look to a leader to provide stability and make them feel as safe as possible, while setting an ethical example. This applies to all levels of leadership, regardless if it’s a parent showing up on time to safely drive their kid home from school, or a military officer leading troops into combat, or a political leader announcing new policies.


We look to our leaders for safety, but before someone can lead, they must first learn to follow. A great leader cannot be a poor follower.


Politicians are leaders. In politics, we can question a political leader’s policies. However, we should never question a political leader’s patriotism. They must respect the Constitution and the rule of law above all else.


Additionally, any organization that allows a leader, no matter how talented, to operate under rules that apply only to others will create a toxic environment where someone is considered “above the law.” Formally documenting any unwritten rules will go a long way to creating a healthier environment.


Finally, being a patriot doesn’t mean blindly agreeing with every government action; it can also involve critiquing the government or advocating for change when one believes the country is not living up to its ideals. But this advocacy for change still needs to follow the Constitution and law.

Tuesday, September 17, 2024

Anatomy of a Sabotage: Planting Explosives in Hezbollah’s Pagers

I’m fascinated by how Hezbollah’s pagers were compromised. This is the most technically creative and innovative attack I can think of since Stuxnet in 2010. A trojan horse of cyberwarfare. 


It seems that explosives were planted in the pagers and two-way radios – it wasn’t merely an exploding battery. This means that the attacker had to gain physical access to the pagers in order to plant both the explosives and the electronic circuitry that triggered it.


Once that was accomplished, the attacker needed access to the pager network in order to send a message to all of the pagers at once, followed, seconds later, by the detonation signal.

It’s astonishing that none of these explosives appear to have been detected by any measures, including airport screening equipment. Obviously, TSA will be looking at this vector.


How Would I Do It?

Rather than intercept the pagers along the supply chain, I would look for an easier way. Specifically, I’d find a consumer electronics manufacturer who’d be willing to license to me both their brand and rights to manufacture the pagers. From there, it would be much simpler to mass manufacture and distribute the exploding pagers.

Friday, September 13, 2024

1977: The Miracle Year for Personal Computers

Vintage Computers Image
L to R: TRS-80 Model 1, Commodore PET, Apple ][
1977: The first three personal computers that were sold, fully assembled.

Wednesday, August 28, 2024

Hallucinations: How Many ‘R’s Are in the Word Strawberry?

Ask your favorite AI chatbot, "How many ‘R’s are in the word strawberry?"

Most will respond with, "The word 'strawberry' contains two ‘R’s." Obviously, that's wrong – the correct answer is three.

This is the difference between knowing and understanding. 

AI models tokenize words. Tokenization is the process of breaking down a stream of text, such as sentences, into individual words and then assigning values to each word in multiple dimensions. An AI model doesn't break down a word into letters, so current models don't use introspection to know what letters make up a word. While an AI model could break down words into letters, the juice is not worth the squeeze when it comes to memory and storage requirements. 

In the world of AI, this seemingly confidence, yet random guess, is called a hallucination.

Tuesday, July 30, 2024

You Don’t Accelerate When Free Falling

Speed is relative.
Acceleration is absolute.

If two objects in space are moving closer to, or further away from, each other at a constant speed, there’s no way to know which once is moving because speed is relative.

But, if two objects in space are moving closer to, or further away from, each other at a variable speed, we can figure out which one (or both) are changing speed because acceleration is absolute. This is how accelerometers work… they measure the absolute change in acceleration. 

Keep in mind that acceleration isn’t just a change in speed, acceleration can also be a change in direction. An object can move at the same speed, but still experience acceleration if it changes direction. 

We say that an object dropped from a building accelerates at 9.8 m/s², but that’s actually not the case. If we drop an accelerometer from a building, it will register 0g’s of acceleration on its way down and this is completely accurate. What’s really happening is that, since spacetime is warped, the ground is moving toward the dropped object at an accelerated rate. 

To picture this, think of a satellite in orbit, such as the ISS. It, too, seems to be accelerating at 9.8 m/s² as it falls toward earth, but its speed doesn’t change. Instead, it’s literally following an unaccelerated straight line through spacetime. Whether falling from a building or orbiting earth, both are weightless conditions and, therefore, there’s no acceleration.

Another way to think of this is imagine traveling in the passenger seat of a car that’s moving at a constant speed of 25 mph. You can easily throw a tennis ball up and catch it without any problems. This is because there’s no change in forward or lateral speed; hence, no acceleration. Now, continue to do this while the car is making a turn at a constant speed of 25 mph through an intersection. The ball will appear to move to the side window during the turn; and the further the ball is from the side of the car, the faster it will move relative to the window. This will give the ball the appearance that it’s accelerating but it's actually the car that's accelerating around the ball.

The next big question to answer is how and why does matter curve spacetime?
 

Tuesday, July 16, 2024

Gravity is not a Force

Gravity is not a force because it’s not mediated by a force carrier. Rather, it’s one of the four fundamental interactions in the universe:

1. Electromagnetic force
2. Strong nuclear force
3. Weak nuclear force
4. Gravity

The first three interactions are forces meditated by quantum particles. Specifically, photons, gluons, and, W & Z bosons, respectively. These force carriers mediate each force, but only photons and gluons are energy. In other words only photons and gluons are particles without mass and they move at the speed of light whereas the W & Z bosons have mass, so they will travel slower than the speed of light. 

Of the two force carriers that are energy, photons have an infinite range while gluons have a range comparable to the diameter of a proton.

Gravitons

How do we know there isn’t some undiscovered quantized particle of gravity speculatively called the graviton? Well, if there was one it would still only move at the speed of light and no faster. And gravity waves (i.e. the effects of gravity) have been observed to propagate through space at the speed of light. But these gravity waves appear to only be ripples in the fabric of spacetime much like water waves oscillating in the ocean.

If the graviton particle did exist as a force carrier, moving at the speed of light, then how could it escape from inside a black hole across the event horizon? In other words, how would the effects of gravity be observed outside the black hole? How could gravity communicate from beyond the event horizon? For this to happen escape the velocity of any particle reemerging from a black hole, like gravitons, would need to exceed the speed of light through spacetime. 

So, while a particle can’t move faster than light through spacetime, spacetime can move faster than light. The law that nothing can move faster than light only applies to particles moving in spacetime – it doesn’t apply to spacetime itself. This doesn’t violate causality since information can’t move faster than light through spacetime.
You can think of gravity as spacetime flowing like a river into mass, called The River Model of General Relativity.