derriz

36 ms·

451.
by derriz 5y ago
It wasn't for political reasons at all. The reactor design - EPR - was specifically designed to be a large reactor[1]. Paradoxically this large-reactor approach was intended to reduce costs but has spectacularly failed to do so with c
452.
by derriz 5y ago
Half of the 6 reads seem like gently sympathetic descriptions of peculiarities of British life (the popularity of holiday walks in bad weather, marmalade and pets). I don't see the source of the offence in any of these stories - but
453.
by derriz 5y ago
The list is a personal selection - some critical of and some positive towards aspects of British culture. I'm not sure why it's upset you so, unless you either believe that there are no unattractive aspects of British culture, or
454.
by derriz 5y ago
> I think your example would easily satisfy regulators. That was kind of my point - the example scenario is clearly legitimate. The problem is that if spoofing is defined as submitting an order with no intent for it to execute, then in
455.
by derriz 5y ago
The language of trading is fairly precise - trades and orders are quite distinct things. Orders may or (commonly) may not result in trades. An order that doesn't execute is not associated with any trade. JPMorgan were fined for spoofi
456.
by derriz 5y ago
Actually it was the SEC rules I had some exposure to but this was a few years ago and was communicated to us via the compliance dept. What I recall is that because of the difficulty in proving intent, the rules allow very broad interpretat
457.
by derriz 5y ago
There were no "fake trades" involved in this case - only orders which were cancelled.
458.
by derriz 5y ago
Why do CFTC try to police this? For the money or optics? Orders far from the BBO are clearly irrelevant and those close to the BBO are not "free" for the spoofer given they have to bear the risk that the orders could be filled if
459.
by derriz 5y ago
The previous time they measured this, as stated in the article, the county with the lowest vaccination rate had the highest incident rate. All you can say is that the _rank_ of a county by incident rate seems uncorrelated with its vaccinati
460.
by derriz 5y ago
The USA hasn't done much better at delivering nuclear reactors on time or on budget in the last 3 decades: Vogtle, VC Summer, Bellefonte, for example. The only reactors to come online in that time is Watts Barr 1 and 2 and Comanche Pe
461.
by derriz 5y ago
One selling point is “free” horizontal scaling possibility. Contrived example: you’ve a parallelizable workload but the work arrives sporadically. 600 pieces of 10 minutes work arrive. In theory, instead of waiting 10 hours to process the
462.
by derriz 5y ago
The solution to the first problem is the Joe Morris algorithm. I first came across it about 20 years ago and really struggled to visualize what was going on. [1] https://yuyuan.org/MorrisAlgorithm/
463.
by derriz 5y ago
In what way is it not a competition? We live in a world of finite resources. When considering the significant task of decarbonizing energy, there are lots of technologies potentially available. But some deliver more value than others. Unf
464.
by derriz 5y ago
Agreed. But assuming no technology advances in this area for 30 years time seems implausible. What has happened with price/efficiency of solar, wind and grid-scale batteries in the last 10 years provides a lesson. None of these were
465.
by derriz 5y ago
"Volatile" renewables absolutely do help reduce greenhouse gas emissions. As the renewables share of generation has been increasing, the CO2 intensity of electricity generation in Germany has dropped from 542gCO2/kWh in 2000
466.
by derriz 5y ago
Of course interconnection is a big help, but transmission isn't "free" or unlimited, the flows between individual European countries is typically a small fraction (less than 10%) of the national consumption and generation. An
467.
by derriz 5y ago
The issue is that we now have real experience of deploying this stuff at scale and integrating intermittent sources into grids. Many countries in Europe have 30% or more of their electricity supplied by intermittent but it turns out that t
468.
by derriz 5y ago
I think this fact is under-appreciated. It has undermined most of the quantitative analysis done in the past. So most of the analysis available is stale. It has also undermined a lot of business plans - even those based on renewables. Fo
469.
by derriz 5y ago
You but your claim was that it was only possible to provide reliable supply by combining _reliable_ sources. This is not the case. Wind and solar are largely anti-correlated in most regions. Depending on the geography, differences in wind
470.
by derriz 5y ago
Nuclear plants are also "intermittent" - the average US reactor spends 32 days offline per year. Does that mean a grid relying heavily on nuclear needs massive amounts of storage? No - it means you need to have redundant capacity
471.
by derriz 5y ago
Combining sources from multiple _unreliable_ sources is actually fine - as long as the failure/intermittency isn't correlated. Defining "fine" as reasonably low variance - i.e. guaranteeing X amount of capacity will be
472.
by derriz 5y ago
There are a large number of people who believe nuclear is a victim of a conspiracy instead of just looking at how economics of electricity production has evolved. Nuclear has been in a steady decline globally since the late 1980s. At one po
473.
by derriz 5y ago
Nuclear isn't dispatchable - most reactors have a design output and are not intended to be ramped up and down. They require a big chunk of actual dispatchable power (natural gas mainly) to provide demand following. LACE is a measure
474.
by derriz 5y ago
Anthropogenic global warming is scientific orthodoxy at this stage. You vastly underestimate the amount of evidence there is for this.[1] You're wrong about climate change models. The first 1990 one was based on a simplistic energy b
475.
Irish High Court challenge against ratification of CETA fails(rte.ie)
1 points by derriz 5y ago|0 comments
476.
by derriz 5y ago
The piece contains examples of the maximum segment sum, such as “mssp [3,-1,2] = 3”. Am I missing something? Shouldn’t the answer be 4?
477.
by derriz 5y ago
Jason Hickel's criticism is either disingenuous or demonstrates basic innumeracy. The criticism uses absolute differences to "prove" that divergence is increasing. This does not make sense. If A and B went from earning 30k
478.
by derriz 5y ago
I'm not really satisfied with this explanation - it feels like a version of the broken window fallacy. Thinking about McDonalds in aggregate, broken machines mean less revenue and more expense (to pay for Taylor call-outs). On a net b
479.
by derriz 5y ago
edit: Sorry - I missed your last sentence on first reading - so yes it's taxes. Danmark is a huge outlier in terms of how much it taxes household electricity consumption. Including VAT, nearly 70% of a Danish household electricity is
480.
by derriz 5y ago
France doesn't have the cheapest power in Europe. Even for non-households, they are beaten by a large margin by the likes of Denmark - where wind is the biggest source of generation. And household consumers pay pretty much the averag

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