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Flytande kärnkraftverk?

Inte så långt ut till havs, men tillräckligt långt för att inte störa. Jag kom på idén idag och en snabb sökning visade att detta är lite hett just nu. Flytande kärnkraftverk kan byggas på ett ställe och sedan bogseras till där de skall vara, kylning blir automatisk och de är okänsliga för Tsunamis. Skulle något gå fel så kan man bogsera bort dem. Låter faktiskt som en bra idé!

Nuclear power: All at sea | The Economist
 

There is plenty of water to keep them cool and the electricity they produce can easily be carried onshore by undersea cables.


New concept for offshore nuclear plant

A new design concept for offshore nuclear power plants with enhanced safety features

Mar 01, 2015 06:02

Därför är massmedia (vänster)populistisk

Tidningen Neo har gjort ett reportage om att P3 är vänstervridet. Det är faktiskt inte så konstigt att massmedier som P3 har en populistisk ådra, och det har att göra med hur massmedia fungerar.

Populism är enkla lösningar på svåra problem. Ofta jobbar man med den dåliga idén att hela världen/landet är ens klan (högerpopulism, nationalism) eller ens familj (vänsterpopulism, åt var och en efter behov - från var och en efter förmåga). Sedan blir man förbannad när det inte funkar så bra i verkligheten, i stor skala.

Vad gäller P3 så är det ju radio, och det innebär att en röst magiskt dyker upp i hörlurar och i tjäll och stuga. Man låtsas att man är i samma rum som lyssnaren. Ja, jag vet att detta är självklart, men faktum är att detta får konsekvenser, nämligen den att journalisten talar direkt till individer som om de vore i samma rum.

Man fejkar en närhet och familjäritet. Känns likheten igen från populismen här ovan? Och detta kan lätt få journalisten att tro att hela världen är en radio, om han eller hon tappar kollen på samhället utanför massmedia.

Massmedia har alltså en naturlig dragning till enkla lösningar, därför att masskommunikation som form bygger på en illusion av närhet.

Feb 20, 2015 02:05

Information wants to be free. What does that make us?

This video by Jack Vale is about what you can find out about random people. A bigger problem is what non-random people can find out about you.

Information wants to be free. What does that make us? A question to ponder.

Stuff you can find out from someone's tweets, instagrams, facebook posts.

 

Feb 17, 2015 11:40

Let Greece and other countries default

Greece and other countries in dire straits in Euroland are not supposed to default. It is seen as a bad thing. But maybe a default would still be the best solution.

Countries in Euroland could be treated as separate risk areas. One country or the whole zone for that matter should not bail out a country. I'm thinking that it would be better to let the creditor banks take the hit.

The creditors will then know to never lend money to that country again (unless under very favourable terms for the creditors).

In this way the problem should fix itself. If one is worried about "to-big-to-fail" creditor banks not being able to take the hit of a Greek default, then treat the problem at the bank level and leave Greece and other countries out of the picture.

Greece then has no debts, and no credit. Or at least more expensive credit and is able to fix itself, given the new conditions it has to function under. It is not possible to blame any other country, cabal, entity or group and the Euro zone has then settled on a model of handling overborrowing that lets the markets set the terms, and does not require more political scaffolding and supervision.

The alternatives to default, all involve moving money around or diluting the money supply. None of that actually increases the value of products or services. All talk about stimulance, rescue packages and the like is just a game of semantics.

One could argue it is a game of smoke and mirrors deciding who actually loses money in the end, see Greece Vs Germany and the disappearing money A default is clearer.

Also check:

Feb 13, 2015 06:30

How terrorism works

Insightful article on the rules for it. It is only a threat if you treat it as such. In a way it is similar to how some diseases kill through the reaction of the immune system (e.g. a cytokine storm). However a warning that the rules may change in the future if bigger threats will get into the  terrorists' hands.

 

Following an act of terrorism, the enemy continues to have the same number of soldiers, tanks and ships as before. The enemy’s communication network, roads and railways are largely intact. Its factories, ports and bases are hardly touched. However, the terrorists hope that even though they can barely dent the enemy’s material, power, fear and confusion will cause the enemy to misuse its strength. Terrorists fight like tai-chi masters: they aim to beat the rival with the rival’s own power.


Read more: Link - Yuval Noah Harari: the theatre of terror | Books | The Guardian

Feb 05, 2015 10:30

Why we shouldn't print money & mess with interest rates

Imagine two hospitals that declare war on fever. After having tried different things, one decides to simply paint all thermometers to indicate 37°C (100°F). The other decides to give all patients massive doses of fever-reducing medication.

Both of these would of course be terrible ideas: Without thermometers it is impossible to know exactly how much fever a patient might be running, and giving fever-reducing medication to everyone would be even worse since that means depressing the immune systems. Instead of treating the root causes of the patients' ailments they are making everything worse by denying or depressing the symptoms.

Still, this is how we are treating the economy: Banks don't want to lend money, so we then give banks an easy supply to newly printed money. That does not solve the problem.

The real problem is that many people are busy doing work they should not do. Their businesses should fail and new businesses should come and take their place and employ the recently jobless.

That is how free economies work, through creative destruction. With the artificial printing of money (fever reducing medication) and centrally set unrealistic interest rates (painted thermometers), we are just leading people further into a dead end. This will make the eventual re-adjustment so much bigger and more painful.

 

Feb 02, 2015 12:01

Greece Vs Germany and the disappearing money

We live in a time where money is going to be taken from people, and we are in the process of establishing who will be the losers.

So why cannot everyone just keep the money they have, we then reset the system there and just continue? We can't because they are literally holding on to the same money. Let's assume that Alexandra in Greece has money in a bank account, where the money originally, through a couple of steps, comes from a loan from a bank in Germany.

What Alexandra in Greece thinks is her money on her bank account, also shows up as the money on Hertha's bank account in Germany.

To see why this is so, we have to take a simplified look at fractional reserve banking, which is how banks work today. When Hertha deposits money into her bank account, the bank only keeps a fraction of it, and then lends out the rest to someone else. That person may in turn deposit it into another bank account, where a fraction will be kept and the rest is lent out by the bank to someone else.

This means that when Hertha wants to take out all her money to do something with it, the other people's bank account balances will be zeroed, including Alexandra's.

Or if the other people down the chain says that they have a right to keep the money, then Hertha's account balance will be zeroed.

So we are basically in the process of establishing who should have their bank balances zeroed.

Jan 29, 2015 04:35

Ett deppigt fasadmaterial (Norra tornen, Tors torn)

De nya skyskraporna vid Norrmalms gräns till Karolinska Institutet och Solna ska få ett fasadmaterial, som jag i skrivande stund inte kan komma på något deppigare alternativ till:
 

"grovt rillad betong, som påminner om borrhål i berg, och har hämtat sin färgskala från stenstaden intill".


Read more: Link - Nya tors torn presenterade - YIMBY Stockholm

Till och med Yimby - föreningen som uttryckligen är för skyskrapor i Stockholm undrar vad de håller på med:

Fasaden kommer kanske att se bra ut initiellt men frågan är hur materialet kommer att åldras över tid, rå exponerad betong åldras sällan med värdighet.

Vi hoppas naturligtvis att fasaden ska bli bra men det är upp till OMA arkitekter, Oscar Properties och Stockholms stads representanter att säkerställa.

Stockholm är en stor del av året en dunkel stad, på grund av det nordliga läget. Att göra byggnader mörka, dystra och ojämna är därför en dålig idé. Faktum är att det nog är en dålig idé nästan varstans i världen.

Ibland springer jag på folk, ofta esteter, som prisar brutalismen. Jag kommer nog aldrig att förstå hur de tänker.

Människan trivs med och uppskattar variation och ojämna former, men då bör dessa överensstämma med naturens formspråk (som är en konsekvens av miljoner års evolution och annan aktivitet). Det enda i naturen som jag kan komma på som skulle likna formspråket med mörka boxar med rillade borrhål är nybildade vulkaniska formationer av pimpsten och aska, eller möjligtvis en stenöken med tungmetall i.

Om man ska ha skyskrapor i Stockholm så bör man antingen ta inspiration från naturen (gärna utanför vulkanöknar) eller göra någonting spännande och roligt i form och färg.

Norra tornen känns som när man står nära Brunkebergstorg i Stockholm, och inte vet om man ska vända sig så man slipper se Kulturhusets brutalistiska baksida eller det svarta bankpalatset med ojämn fasad.

Det verkar föreligga en enorm skillnad mellan det estetiska omdömet hos beslutfattarna i Stockholms Stad och mitt. Och det är väl inte så farligt om det bara vore jag, men jag tror att det är en försvinnade lite del av de som i framtiden kommer att få titta på de där husen som som håller med Stockholms Stads anställda esteter.

Jan 28, 2015 04:55

XMPP for group chat, logged in on multiple devices

For a non-profit I am evaluating different options for a group chat, meant to replace the current Skype chat. Currently I am looking at ejabberd, a server for the XMPP protocol. The users of the Skype chat would like the new chat to have the following properties:

  • Encrypted communication
  • Good clients on Windows, iOS, Android, Linux and preferrably on more stuff such as web browsers
  • The Android client should be better than the Skype Android client (which has historically been very slow at updating ongoing group chats)
  • One should be able to be logged in simultaneously from several devices, under the same user name, and be able to switch between them transparently

 

So how does ejabberd handle these demands?

Simultaneous log-in

Ejabberd is better at handling a user logged in simultaneously from several devices than OpenFire - another XMPP server - in our tests. While being logged in as the same user, both Kopete and Pidgin (Linux XMPP clients) have no problem seeing each other's posted messages in a group chat, while Xabber on Android will not see their postings, but can post, and its postings are seen by the other clients. Ths is not a big problem, the only drawback is that while being on the mobile phone, you won't be able to see you own postings made in the past, if they were made from another device.

There might be some way to reconcile this, it probably has to do with priority levels for each client. Here is some further reading, although I could not seem to make a difference by tweaking the priority settings. Having chat history stored on the server may also mitigate this; will see if ejabberd can do that.

The XMPP Android client should be better than the Skype Android client

Xabber seems to update instantaneously. Still have to check if it can pull history from the server. I tried a slew of other XMPP clients on Android but did not find one that worked well with group chat.

Clients on all major platforms

Seems to be well supported

Encrypted communication

I initially turned this off since Pidgin does not accept self signed certificates. I then turned it on, and well, Pidgin still balks. Xanner an Kopete are fine. So off it is till we get the chat server to a domain name for which we would like to get a certificate. The three clients otherwise had no problem with encrypted communication so it will likely turn out well.

 

Jan 17, 2015 08:09