Google’s Music Transformer can generate piano melodies that don’t sound half bad
- As the team explains, producing long pieces of music remains a challenge for AI because of its structural complexity; most songs contain multiple motifs, phrases, and repetition that neural networks have a tough time picking up on.
- By using an event-based representation and a technique known as relative attention, the Music Transformer is able not only to focus more on relational features, but generalize beyond the length of training samples with which it’s supplied.
- In tests, when primed with Chopin’s Black Key Etude, Music Transformer produced a song that was consistent in style throughout and contained multiple phrases sourced from the motif.
- The team concedes that the Music Transformer is far from perfect — it sometimes produces songs with too much repetition, sparse sections, and odd jumps — but they’re hopeful it serves as a muse for musicians in need of inspiration.
Machine Learning Trick of the Day (8): Instrumental Thinking
- If this assumption is actually true for the problem we are addressing—that features x are linearly related to targets y using a set of parameters \beta, and noise only affects the targets—then we can also call our model a structural model (or structural equation).
- Consider what is known as an errors-in-variables scenario1 (see figure 1 (centre)): a regression problem where the same source of noise \epsilon affects the features and the target.
- The instrumental variables trick asks us to use the data itself to account for noise, and makes it easier for us to define structural models and to make causal predictions.
- But we do have a trick for such scenarios: we can use instrumental variables regression and remain able to learn value-function parameters that correctly capture the causal structure of future rewards.
- Like every trick in this series, the instrumental variables give us an alternative way to think about existing problems.
Incredible shrinking 3D printer can make really tiny objects
- The method can be used to produce a variety of shapes, from tiny hollow spheres to microscopic linked chains.
- They previously developed a method for magnifying small details in brain tissue by embedding it in another material and then expanding it – reversing this gave them a way to make big things small.
- To test the idea, the team made scaffolds out of polyacrylate, an absorbent material used in nappies, and built centimetre-sized structures inside by sticking molecules to anchor points using lasers.
- The researchers created objects, such as hollow linked cubes and an etching of Alice in Wonderland, using the method.
- Each was around 1 cubic millimetre in size, containing structural details of around 50 nanometres.
- In a handful of tests, they were able to expand and shrink the structure by 8000 times.
NAB faces an even bigger executive pay strike than Westpac
- The Westpac strike is the biggest at a blue chip company since 2007, when 66 per cent of investors voted against then chief executive Sol Tujillo's pay.
- The leads to the main problem that investors have with NAB's pay in 2018 – the size of bonuses given the misconduct and risk management issues at the bank.
- Investors are questioning how the board allowed this risk gate to open given the misconduct highlighted by the royal commission this year.
- It is this decision, which many investors are seeing as a poor commercial judgment, that leads to the second and more specific concern with NAB's pay: chairman Ken Henry's shift to the highly controversial single variable remuneration structure.
- Some investors argue that if the board can't get bonus levels right in a year like the one that NAB has had, how can they be trusted with a new scheme that hands them even more power?
Scott Morrison to establish a federal ICAC
- The Morrison government has moved to ease growing political pressure and announced it will establish a national anti-corruption body, a Commonwealth Integrity Commission.
- For months, the government has resisted calls by Labor and others to establish a federal version of NSW's Independent Commission Against Corruption but admitted in recent weeks the issue had been under consideration when Malcolm Turnbull was prime minister.
- The Public Sector Integrity Commission will cover the remainder of the public sector including all government departments, agencies, their staff, parliamentarians and their staff, staff of federal judicial officers, as well as Commonwealth service providers and recipients of Commonwealth funds.
- To guard against the Commission being used as a kangaroo court, Mr Morrison said only the Law Enforcement Integrity Commission could conduct public hearings.
- Labor has been calling for such a body for months but Mr Morrison said it was important not to rush but to get the detail right.
Changing consumer behavior is the key to unlocking billion dollar businesses
- For instance, at Airbnb the behavior shift of staying in someone else’s home created a completely new experience that was 1) cheaper, 2) more authentic, and 3) unique.
- The behavior shift enabled a new product experience.
- One key benefit of a behavior-shifting product is that it commonly creates a new market where there is no viable competition.
- Companies that innovated within those markets created new greenfield but also continued to grow the existing market pie and take market share away from the incumbents.
- A behavior shift also allows the innovator to shape the future by creating a new product experience and pricing structure.
- In many cases, that shift ultimately eroded the competition’s existing economic structure, making it extremely challenging for them to participate in the new model.
- Scooter networks are a real-time example of a behavior-shifting innovation that is just getting going.