Neural nets are typically trained by âsupervised learningâ. So theyâre presented with many examples of an input and the desired output, and then gradually the connection weights are adjusted until the network âlearnsâ to produce the desired output.
To learn a language task, a neural net may be presented with a sentence one word at a time, and will slowly learns to predict the next word in the sequence.
This is very different from how humans typically learn. Most human learning is âunsupervisedâ, which means weâre not explicitly told what the ârightâ response is for a given stimulus. We have to work this out ourselves.
In The Conversation
Weâre told AI neural networks âlearnâ the way humans do. A neuroscientist explains why thatâs not the case
in The ConversationThe case for degrowth: stop the endless expansion and work with what our cities already have
in The ConversationNow is not the time for anyone to announce that their city will become âbigger and betterâ. Cities donât have to get bigger to evolve, and sooner or later all will have to reckon with the concept of degrowth.
Australia must become less reliant on imports of skilled workers, students, tourists and materials. We can make better use of local resources and produce much more of what we need here.
Australian cities have very good bones. They have amazing cultural scenes. Their biomedical capabilities are among the worldâs best. Our education sector remains eminently exportable online and via existing overseas campuses. The manufacturing sector still has a base to build on and provide many more of the products Australians need. And our renewable energy capacity is unlimited.
We can support our local hospitality and cultural venues better, and increase intercity and interstate patronage. We can invest in research and development and maintain wealth through innovation and production, rather than the eternal consumption of land.
The worldâs 280 million electric bikes and mopeds are cutting demand for oil far more than electric cars
in The ConversationThe electric transport revolution is a great chance to rethink how we move through our cities â and whether we even need a car at all.
Cars, after all, often have only one occupant. Youâre expending a lot of energy to transport yourself.
By contrast, electric mopeds and bikes use a lot less energy to transport one or two people. Theyâre also a lot cheaper to buy and run than electric cars.
If you commute on an e-bike 20km a day, five days a week, your charging cost would be about $20 â annually.
Want to cut your new home costs by 10% or more? Thatâs what building groups can do
in The ConversationIn 1990s Berlin, baugruppen (building groups) came to the fore in response to the German cityâs housing crisis. Building groups are DIY collectives of future resident-owners who come together to develop their new homes. Households become producers rather than consumers, so they save on the developerâs profit margin and have more control over building design and quality.
At its peak, about 17% of new homes in Berlin were baugruppen projects. By 2017 more than 600 projects had been completed. The current master plan for redeveloping Berlinâs former Tegel airport calls for baugruppen to produce 2,000 homes â 40% of the projectâs housing.
The success of baugruppen has inspired building groups in Australia. Data from one development and advisory service that assists building group members show members have on average saved around 10% on their new home building costs since 2010.
As well, they save on transfer taxes/stamp duties and mortgage interest payments. So in Victoria, for example, total savings could be as much as 16.5% on a A$1 million house.
How big UK housebuilders have remained profitable without meeting housing supply targets
in The ConversationIn the years following the 2008 global financial crisis, the âbig threeâ housebuilders that dominate the new-build market in Britain have been able to increase their profits without significantly increasing the number of homes they build. This has happened despite political pressure to increase UK housing supply.
They were able to do this, we argue, because they have built up significant structural power: they can use their control of housing land and housebuilding to secure state support for initiatives that benefit their shareholders by pushing up their share prices and profitability.
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We argue this state support via planning liberalisation has given volume housebuilders whatâs called monopsonistic market power in local land markets. In other words, itâs created a buyer-dominated market. This has kept the cost of their land relatively flat while UK house prices continued to rise.
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When market power in local land markets was combined with structural power over the state, we believe volume housebuilders were able to increase their profit margins rather than ramp up delivery to help the government meet its target of 300,000 new homes per year in England. Our research shows it was in the interests of the volume housebuilders not to rapidly increase their housing supply for two main reasons.
Look to the mainstream to explain the rise of the far right
in The ConversationThe resurgence of reactionary politics is entirely predictable and has been traced for a long time. Yet every victory or rise is analysed as new and unexpected rather than part of a longer, wider process in which we are all implicated.
The same goes for âpopulismâ. All serious research on the matter points to the populist nature of these parties being secondary at best, compared to their far-right qualities. Yet, whether in the media or academia, populism is generally used carelessly as a key defining feature.
Using âpopulistâ instead of more accurate but also stigmatising terms such as âfar-rightâ or âracistâ acts as a key legitimiser of far-right politics. It lends these parties and politicians a veneer of democratic support through the etymological link to the people and erases their deeply elitist nature â what my co-author Aaron Winter and I have termed âreactionary democracyâ.
What this points to is that the processes of mainstreaming and normalisation of far-right politics have much to do with the mainstream itself, if not more than with the far right. Indeed, there can be no mainstreaming without the mainstream accepting such ideas in its fold.