I started reading some quantum physics as a hobby. I’m scanning through, very cursorily absorbing the ideas. And thinking.
I was immediately somehow caught by the Yang-Mills challenge. It’s something that I do not understand basically at all. I wanted to know more, at least so much that I could understand what the challenge wants a person to solve.
Yang-Mills is about finding a kind of uniting beauty, the “next level”, if you wish, in quantum fields theories. It seems that during the last 50 years there’s something that has bugged theorists: fermions.
Fermions are massless particles. Pauli who was a famous nuclear physicist, invented a 6-dimensional theory but refrained from publicizing it since (perhaps) his intuition was, that the massless particles were aberrant and indicative of possibly an erroneous theory?
Fermions, I originally thought, were purely an ‘odd class’ of elementary particles. I read again the parts of Wikipedia, which tell about fermions. When coming to contact with quantum physics, my background is that I excelled in high school physics, but ever since (that’s 20+ years ago), well.. Haven’t much used any of the stuff actively.
Mechanics, kinematics, thermodynamics were all very interesting areas of high school physics. I didn’t especially like optics, because I found optics to be reliant on mostly trigonometric functions; and trigonometry was to me combining two things I absolutely detest: approximate values, given by a calculator or a table of mathematics; and having to rotely memoize “which is which” – I never seemed to remember was it sin() or cos() to be used in certain situations. So to me the use of sine or cosine was kind of this black box mentality. And I always mixed them up! 🙂
Other pieces, perhaps, than the massless particles, somehow fit the spirit of our (possibly “innate”) newtonian thinking, where there shouldn’t be oddities. Newtonian means the classical functions describing things like:
a falling object (under gravity)
bouncing (elastic) objects – momentum
acceleration due to a force other than gravity
the “conservative” friction (which is also a force), whose energy is always wasted effect
But on the other hand quantum physics does lead to some counterintuitive thinking.
I’m mesmerized by the [the margin is way too erratically set in order for me to continue writing here, right now]
Jos käytät Googlea tiedon hakuun sisäänkirjautuneena, eli “omalla tunnuksellasi”, näet eri asiat kuin mitä tuttavasi näkee. Näet myös eri asiat kuin mitä näkisi anonyymi robotti tai ihmiskäyttäjä – anonyymi, eli sellainen joka ei ole kirjautuneena, tai jolle ei ole vielä kertynyt profiilia.
Sisäänkirjautuessa googlen hakukoneen serverin ohjelmisto saa profiilisi; tämän jälkeen Googlen analytiikkakoodi tuntee sinut paremmin kuin naapurisi, puolisosi – tai jopa sinä itse. Profiili on erittäin tarkka. Tietokone ei myöskään unohda, jollei sitä käsketä unohtamaan.
Profiilin tarkkuus ja sen sisältämän tiedon syvyys perustuu siihen, että käytämme valtavan usein google-hakua. Se on hyvin huomaamatonta. Tee testi! Paina Ctrl+H näppäimistöltä, kun olet seuraavan kerran Chrome-selaimessa. Näet hakuhistoriasi. Kirjoita historian paikalliseen filtteriin ‘Google’, ja näet nyt pelkät haut. Jokaisen haun vieressä on ajankohta, jolloin hakua on käytetty. Laskin viikonlopun aikana tapahtuneet omat haut – olin tehnyt parisataa google-hakua, kuin huomaamatta. Luku yllätti suuruudellaan.
Kun ensimmäisen kerran törmää oikeasti filtterikupla-ilmiöön, se hämmentää. Asiaa ei vielä ymmärrä, mutta huomaa, että “jokin bugittaa”; miksi tutulla näkyy eri jutut kuin itsellä? Tuttu on saattanut antaa linkin, jotta näkisit nimenomaan tietynlaisen Googlen antaman hakutuloslistauksen, mutta sitä ei odotuksista riippumatta tulekaan.
Ilmiön taustalla on Googlen noin vuodesta 2004 alkaen kehittämä personointi hakualgoritmiin. Haut pyritään tekemään älykkäämmäksi, hyödyntämällä erittäin suurten massojen louhintaa. Louhinta tarkoittaa, että tekoäly voidaan opettaa todellisten tallennettujen tulosten perusteella, ilman että ohjelmoijan täytyy lainkaan miettiä toteutusta. Periaatteessa siis koodi on suhteellisen lyhyt ja helppo, mutta sen perusteella muodostuu älykästä toimintaa, kun algoritmille syötetään miljoonien ihmisten hakuhistoria ja niiden perusteella tapahtuneet “toiminnat” eli käytännössä valinnat.
Personoinnilla pyritään nostamaan Googlen käyttökelpoisuutta ja hyödyllisyyttä käyttäjälle, meille. Sen sivuvaikutuksena syntyy tietynlaisia lieveilmiöitä, kuten filtterikupla.
Mistä muista verkossa tapahtuvaan profilointiin liittyvistä asioista haluaisit kuulla?
Kerro kokemuksesi ja paranna blogia tulevaisuudessa. Iso kiitos!
What kind of things such a creature do? Here’s my bet:
understand stuff (mandatory)
set goal, set the path – have a discussion – and then shut up. Let the team resolve and get excited.
visualize and explore new vistas
ask to understand, if you don’t. It’s ok to ask, really. Don’t pawn uncertainties. Agile method is all about sharing uncertainties and learning.
do stuff that makes people independent and lets them fulfill their role with ambition and success!
coach, mentor people
back up, ensure the project viability
explain how things are made
weigh in on factors of decisions within the architecture
have clear-set goals for all developers and other productive project stakeholders
manage the backlog (‘grooming‘)
do roadmapping with project lead, if you are not the project lead as well
remove obstacles of a beautifully shaped progress in Kanban metrics
By the way, Roadmapping and keeping a working, neat backlog should definitely be a different thing. Things in Roadmap should be a bit higher level overviews of what kind of features in general the software will have. As a Roadmap item is taken to production, it becomes a Backlog item.
I haven’t much done games – as in programming them! During 1990s I did one, called ‘Space Shrapnel’ (finnish Avaruusromua), where a spacecraft has to be navigated through a random asteroid field – a side scrolling action game. Although a very simple game, it was quite much fun doing it!
I wrote the game in Commodore 64 BASIC. Designed a sprite, bound the keyboard controls to the spacecraft; added a scrolling background with character-mapped graphics. That was it. Some 200-300 lines of Commodore BASIC language. There was naturally also a “epic” (hmrhmhm….) background tune – but I refuse to talk about the merits there.
Thus this was my thinking one day: let’s grab some Python and do a proper game!
I think part of the reason that I’m really bad at implementing games, is due to the fact that I tend to over-engineer plans, while leaving the rote coding astray in hobby projects. Coding is hard, you know! It’s time to change that.
Python is one of the programming languages I have had a keen interest on learning. I’d done some “mainly read, some writing” of 3D scene importing scripts (for Blender 3D software).
Yet Python remained a bit distant as a casual language for making any standalone project – things that could really stand on their own, and be executed independently.
Battle sim in Python, day 1 (17.8.2019)
I wrote a piece of program to represent “armies”. I want to push armies against each other, one on one. The armies are represented as stats, a bunch of numeric data, and then the battle algorithm – along with a bit of chance – determines outcomes of individual clashes.
At first they only had:
person count (soldiers)
offensive strength score 0-100
defensive strength score 0-100
Naturally that wouldn’t suffice. If actual battles were to be simulated, the armies would have casualties! So maybe it would be proper to record number of soldiers who went KIA, killed-in-action.
At this point my code was around 100 lines of Python. Some structures, initializing routines (“constructors”) for the armies; a bit of boilerplate, and whimsical plans for development, thrown in as inline comments within the code. The typical startup.
I couldn’t yet run the code. In a way the ability to run code would give something to grab: when you can get into that legendary “loop”, things usually look much brighter. Getting to the loop as soon as possible can be considered a modern cornerstone of agile development.
It was time to amend this and make a version that would run, print out at least some signs of life; and then terminate. I’d be quite happy with that as the first day tour of duty.
Language details: Python 3 and data structures
what are the batteries-included in Python 3, without using ‘import’ statements?
everything is now a properly formatted function
Python 2 was a bit ‘scriptish’, Python 3 is more formal
I split the initialization of the Battle Sim to constructor functions. They set data in the “army” variables. Python has a dict which suits well representing a record like an army: you have key-value pairs in the dict. By making a contract with yourself, that for example
What would the essence of a truly futuristic, perfect information society be?
digital, intelligent mobile networks
smartphone software (apps)
but before anything else, satisfaction and accessibility: technology being useful and understandable to people.
I have been fascinated by application of technology, especially the possibilities of communications together with high-tech (IT), for basically my entire life.
From hands-on experience on a very specific, low level assembly programming on a home computer, I later embarked on studying some (103 ECTS points worth) of computer science curricula – and have done most of my professional work as a software developer.
However, alongside I’ve carried a strong interest towards humanities, especially clinical human cognition, short-term memory, in general: neuroscience; theory of mind, and also layman psychology. Motivation. The kind of kitchen stuff that makes interesting conversations and sometimes even conversions. But which also has an amazing effect on us as information processors. When software and systems designer understand the underlying “fundamentals” of the users in all their variability, the technology can be successful. We humans even tolerate “pain” quite much, but we are not good at that if the prize we’re going to get is relatively too low.
Sometimes quite seemingly evident changes take decades to happen. Afterwards the time periods seem to compress, and we don’t even remember that some paradigm change was a big deal. That’s human.
Too fast – or too slow?
Yet we often speak as if we would continually be engaged in change that is just like a train moving a bit too fast to be comfortable. There’s been a lot of (hot) and true talk about information
That’s true! …and not. I think the feeling of what is proper speed — “comfortability zone” — also depends on our particular capabilities, mindset and motivation at the time of evaluation. We’re sometimes undulating, and that’s very human indeed – part of our neural wiring.
1969: mobile pioneers and NMT
Cellular connectivity, one of the main building blocks of our connected world, got started as early as 1969 with the formation of NMT: Scandinavian co-operative, Nordic Mobile Telephony. The organization was able to set important practical standards in mobile telephony.
NMT had severe limitations, due to it being rather simple, “analog” technology.
Enter GSM, the next wave of mobile technology.
Without standardizations, both NMT and later GSM, the influx of mobile phone usage would have soon met with a capacity cap of essentially limited bandwidth. NMT
users and having more people owning a mobile phone, the situation would soon have been unbearable: people would accidentally overhear other people’s conversations, and the discussion streams would have become unintelligible due to mixups.
GSM built philosophically on top of NMT. GSM digitized the cellular network. It made the network better and more secure; more people could join the mobile revolution. GSM enabled digital services in addition to plain voice calls. This was one the key features, again a stepping stone up to the information society.
Many phone vendors built sophisticated mobile phones. The era of smartphones had started.
Data became equally important early on: messaging in all possible formats proliferated quite quickly. It started from 160-character messages between two GSM-phones (the SMS – short messaging service), group SMS, and email; with the availability of smartphone apps, all communication protocols (instant messaging just as one) were available to smartphones.
Just before app store?
With proliferation of smartphones, we craved for software – and soon got a tsunami of apps. Apps were first quite clumsy to install. I remember (2009) the time when getting a neat app for blogging on WordPress, on a Nokia E71, meant about an hour’s worth of geekness: finding the install package (a .sis file), downloading, transfering to the phone; installing it, and even installing some other software packages (or even entire frameworks) needed to run the thing. A big PITA.
Go forward just a few years, and voila! The ‘app store’ – it’s a major accelerator. Also helps people keep their apps updated and secured. Note a very curious twist of the history here: The technical concept of an app store was actually patented by Nokia, and licensed to Apple (among others). [5G phones licensing includes App store royalties]
Now we have lived in the era of app proliferation for 12-13 years.
What about the next 13 years? Say, years 2020-2032! It’s such a long term, but on the other hand I know for sure that many things come out of the labs in about 10, 15 or 20 years.
The path of new innovation, from discovery to actual street availability is quite long. VoIP (voice over IP), Wireless networking, etc all took their time to proliferate.
There’s in fact almost an overload of choice for each possible facet of life imaginable.
But that is exactly also the problem: to live your life, we’re prone to get more and more apps installed on the phone. It’s as if no one ever thought about a whole person – all we, the users, see is the point of view of a single business, a single company, or a single service provider. We’re viewing often their micro-empires and visions.
Corporate-centric UX can be clumsy: to buy coffee, yes, there’s an app. AND IT ONLY SUITS one brand of cafeterias. The same with everything: parking, paying at the groceries, bonus systems of you-name-it; etc. Every single business reinvents the wheel, with varying dressings, but essentially the same beef. The result is a frustrating jungle of apps installed on your smartphone.
Imagine this very likely future scenario:
you wake up with the aid of a alarm clock app
your fridge activates another app
your coffee percolator does something with an app – or you will need to service the percolator (order more filtration papers or coffee beans)
your electric toothbrush winks a Large Corp app that it’s about time to get some brush heads – but notquite fully automatically
before you’ve gotten out of your home (the door security system requires a fingerprint), you have interacted with half a dozen apps
wait till you start commuting…
each interaction takes anywhere from 5 to 60 seconds, depending on what kind of authorizations and confirmations are configured in the apps
I don’t know about you, but I thought essentially that the future society and intelligent systems were a promise to save our precious free time. The de facto way things are going is that we’re pledging more and more time to miniscule interactions with gadgets, all the time.
Ok. We have a problem. We solve problems. That’s what people do.
The problems in current smartphone era
finding a suitable app for The Thing You Wanna Do
installing the app – yes, even still. Even now. But what about in 2030s? Maybe solved.
authorizing the app for the first time: access to this, that, and some
dispersed user data and privacy asymmetry, inbalance -> Project SOLID and Inrupt, others.
updates and all the mental fuss associated with deciding whether or not to choose something
discontinuations of services / apps
finding replacement for the discontinued app
porting your data (in reality, not theoretically) to the replacement solution
Couple of very optimistic scenarios and themes from 2032
no need to carry wallet around anymore
natural, high resolution VR enabled all around us
effortless authentication to computer systems (no passwords anymore)
perfect information security, while data being available for scientific and generally useful computing
enable remote work for a greater portion of workforce
more free time gets accumulated for a greater portion of workforce
human lifespan improvements
healthier population in general (social and medical improvements)
targeted, precision medicine
reducing human error at work with help of technology
backups of user data is always understandable, safe and automatic
automatically scheduling complex events optimally for maximum % of all participants
if you can’t see your whole component without scrolling in your editor, refactor your code!
The real benefits of component thinking?
Think of that delicious piece of cake. Doesn’t it look clean, very enticing? There are layers; and the cake has a definite shape. However, the process of making one piece of cake is nothing butclean.
[Sorry guys – I have no idea why I brought that cake here. I’m trying a sugarless diet mostly]
In React, each component has a shield against global scope.
Each component also protects the scope at the same time. It’s a two way street, except… well, two-way was bad analogue. Since in React, the whole idea started with ‘props’: passing each component the necessary information, strictly one way. The component doesn’t see the global scope, and it shouldn’t.
Your React components are the hot-blooded trotters with eye patches properly aligned to make your web app a winner!
Especially if you want to get hands dirty quickly with development on a Windows laptop / PC. This is a real-world story of how I found the new fav toy! But what else? Find out.
Just as with alternatives, you get a Apache, PHP, MySQL stack with a single click. But Laragon is also a bit more:
automagic virtual hosts: Laragon can update your HOSTS file
also Rails stack installed
seems to handle .dll dependencies well (I had trouble with alternatives)
Skip me if you know PHP
PHP is a versatile jack-of-all-trades. And it definitely holds its place with a firm grip. WordPress (blogging engine) and thousands of other well known apps are written in PHP. The power exists in a sturdy set of very central and useful built-in functions, which were chosen and developed by a real web admin for his own needs.
The true web pioneering technology
PHP evolved over the years. It had a very early start in 1994. PHP adopted very good ecosystem tools, such as linters, security checkers, and PHP was supported as a drop-in module in many kinds of web hosting environments. You could thus rely on the investment keeping its value.
I knew all this yet had barely written a few thousand lines of PHP in 2019. I felt that it was time to take mastery of PHP, even if I did it just at a rate of 20 minutes daily.
Peak to the neighbor: Node + Express
Node ecosystem has ‘express’ which is a light-weight development server. I’ll let the figures speak for themselves. Also, look at the setup of minimalist server-side code: couldn’t be easier?! The root ‘/’ is hooked to a anonymous function, that always returns the Hello world string. This is beautiful!
Idea across all of these is that whereas with Apache or nginx you usually handle more complicated real life dilemmas of web hosting; as developer you are interested in passing a single HTTP call, successively, to your code under development. You want button and menu item elements to fire action, and see what happens. As developer we’re more interested in the change of state of the app, as response to user input; rather than more complicated issues, kind of “..yet”. It helps to constrain the problem at hand to an understandable piece.
It was yesterday that Linus’ tech channel video kindly introduced me the idea of a Pi-hole. It’s a Raspberry Pi -based gadget that makes web surfing less painful, by removing a lot of the ads present in apps and web pages.
UPS backup power from 9V battery or similar, if required for graceful shutdown
a physical case
SD card of sufficient size (to hold future blacklist + whitelist data)
rather minimal software footprint apart from the required
remote connection daemon (ssh?) running on the device
web interface for configuration (comes with standard Pi-hole)
What does the Pi-hole do?
Serving you almost ad-free Internet at home or office. Pi-hole is a very small embedded computer, readily available as Raspberry Pi devices. After a software install, there’ll be a dashboard (GUI) and some server software that will do the magic.
The promise is that by configuring your tablets, phones and PCs to use the IP address of Pi-hole instead of the ordinary public DNS server (given to us usually by Wifi connection automatically), you can save yourself the headache of watching countless ads during the day.
Pi-hole runs on Raspberry Pi; it can run on any embedded Linux OS, that supports certain key factors necessary: a network stack for TCP/IP, and a way for the device to be a middleman in Internet traffic.
The device has software: an ordinary DNS server daemon, which has been modified to consult both a whitelist and a blacklist. Whitelist means internet addresses that are accepted by you, the user. Blacklist is typically downloaded from a main repository which curates known aggressive ad distribution servers.
When a computer, tablet or phone’s web browser asks for content via a DNS query, the request goes through Pi-hole device first (Pi-hole has typically a static IP address so technically it is always there, ready to respond, when computers use DNS). Pi-hole checks the request against its whitelist and blacklist. If an address is on whitelist, it gets passed to real DNS server from the other network interface. If the address is on a blacklist, then it means that ads would be served, and Pi-hole simply reports (fakes the answer) that the server is “missing”.
Sivuraiteella: samalla kun aloin todellakin pääsemään vauhtiin CSS:n kanssa, huomasin kutkuttavan pienen haasteen.
Usein projektien kanssa käy niin, että nälkä kasvaa syödessä, ei pelkästään “sinne minne piti mennä”, vaan välissä tarvitsee hieman pompata sivullekin, oppiakseen jotain millä on käytännön hyötyarvoa projektissa.
Samaan aikaan kun blogaan CSS:n oppimisesta, pidän pientä interaktiivista muistiota Codepen -sivulla
Sivu demoaa CSS:n avulla tehtäviä juttuja. Suuri osa sivusta on tekstiä, mutta sitten tuli tarve oikeasti NÄYTTÄÄ miten juttu toimii. Opimme matkimalla, apinoimalla. Ohjelmistojen kaunis puoli on se, että niille on ominaista helppous toistaa ja näyttää asioita.
Eli halusin antaa lukijalle napin, jolla voi helposti nähdä miten CSS vaikuttaa. Kun painat nappia ensimmäisen kerran, se laittaa tyylin PÄÄLLE. Toinen napsautus poistaa tyylin. Nappi toimii kuin valokatkaisin.
Web-selaimen moottori ja CSS
Web-selain parsii HTML-lähdekoodin DOM-puuksi. DOM-puussa on solmuja (‘nodes’). CSS:n määrittelyt tallennetaan omaan rakenteeseensa selaimen muistissa. CSS tulkitaan ja sen määräämät muutokset laitetaan koskemaan noita aiemmin mainittuja DOM-puun solmuja – ja tässä kohtaa nimenomaan tulevat peliin mukaan CSS:n säännöstöt; ne ratkaisevat, miten ja kuinka monen eri tyylin yhteisvaikutus lopulta muuttaa solmun eli web-sivun ulkonäköä.
Hei, aika heavy lätinä. Mennään seuraavassa jaksossa pariin kikkaan mitkä huomasin! Tiedossa on silloin:
muutamia kysymyksiä, miten kannattaa suunnitella piirre, jos mitenkään (vai onko se niin yksinkertainen että “just do it” pätee!)