sradman

46 ms·

361.
by sradman 6y ago
Machine vision system that detects insects and targets them with a retina safe laser, however: > For both the coarse and fine tracking systems, subjects are identified by the size of their silhouettes generated from near infrared LED bac
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by sradman 6y ago
The paper Climate controls on erosion in tectonically active landscapes [1]: > The ongoing debate about the nature of coupling between climate and tectonics in mountain ranges derives, in part, from an imperfect understanding of how to
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by sradman 6y ago
> So a storage abstraction layer on top of IndexDB with a proprietery API. ...that synchronizes with a server-side abstraction layer on top of MongoDB. This is essentially the Meteor architecture. Synchronization is non-trivial and the s
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by sradman 6y ago
The Significance section of the paper Early human symbolic behavior in the Late Pleistocene of Wallacea [1]: > We present evidence from the Late Pleistocene of Sulawesi, Indonesia, where an unusually rich and unique symbolic complex wa
365.
by sradman 6y ago
Good question. The video shows the first posts floating in air across the river and dropping magically in-place. These posts are then connected into a kind of scaffolding for the caisson [1]. A pile driver is built on top of the scaffolding
366.
by sradman 6y ago
And the Marginal Revolution (MR) post Thoughts on Peter Burke’s new book "The Polymath" [1]: > 14. Here is a good piece Beware the Casual Polymath . It is somewhat ironic that HN comes across as uncivil compared to the typic
367.
by sradman 6y ago
> Subjects in the intervention group were trained for 10 d in meditation (third eye meditation), breathing techniques (i.a., cyclic hyperventilation followed by breath retention), and exposure to cold (i.a., immersions in ice cold water)
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by sradman 6y ago
Yesterday’s HN thread SciTer, HTML/CSS Engine, May Go Open Source via Kickstarter : https://news.ycombinator.com/item?id=24786527
369.
by sradman 6y ago
> The results suggest that a higher number of masticatory cycles before swallowing may provide beneficial effects on satiety and facilitate glucose absorption. I wonder if the satiety increase isn’t due to spreading consumption over a lo
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by sradman 6y ago
> We just have a much higher population, a higher % of them are well educated, and we have an enormous body of historical knowledge Specialization and trade accelerated with the Industrial Revolution as well; Adam Smith’s division of la
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by sradman 6y ago
https://en.wikipedia.org/wiki/Portland_cement#Environmental_...
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by sradman 6y ago
Sunken ships and pier pilings are generally a haven for underwater animals; this is a key principle behind the creation of artificial reefs.
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by sradman 6y ago
Flooding land for hydro power generation can also release significant amounts of natural mercury: https://en.wikipedia.org/wiki/James_Bay_Project#Mercury_poll...
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by sradman 6y ago
I was specifically responding to the following claim that the Netherlands: > ...had an early lead on the UK in terms of industrialization with our windmills, but then they figured out how to use coalpower and took over The point, that I
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by sradman 6y ago
Portland cement production, not concrete which consists of aggregate as well. There must be many trade offs in this design and one can imagine pure sand as ballast so the concrete plays some structural role. The sea floor anchor design and
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by sradman 6y ago
Waterwheels were more than competitive before coal powered steam engines took over. Still, it is a fascinating question: why wasn’t the Netherlands a fast-follower in the Industrial Revolution?
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by sradman 6y ago
> What’s groundbreaking about the Hywind project, located in more than 300ft (90m) of water, is that the giant masts and turbines sit in buoyant concrete-and-steel keels that enable them to stand upright on the water, much like a fishing
378.
by sradman 6y ago
From the paper Walking in mud: Remarkable Pleistocene human trackways from White Sands National Park (New Mexico) [1]: > We describe a long prehistoric human trackway (1.5 km) of Late Pleistocene age at White Sands National Park (New M
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by sradman 6y ago
The cause appears to be due to a toxin produced by a micro algae bloom: https://phys.org/news/2020-10-kamchatka-marine-life-death-al...
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Kamchatka marine life death caused by algae(phys.org)
4 points by sradman 6y ago|0 comments
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by sradman 6y ago
Also see 9 day old HN thread Eco disaster at Kamchatka peninsula with mass death of sea animals [1]. I still find it odd that the die off is restricted to benthic animals. I can’t think of a plausible cause but I’m sure that an explanatio
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by sradman 6y ago
> Reactors from civilian plants don’t blow up like atomic bombs... No they don't, but they do blow up like industrial hydrogen gas explosions. Loss of coolant accidents are unforgiving in boiling water reactors and quickly fail cata
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by sradman 6y ago
> The conclusion of the paper is just bad science, not an example of human microevolution. "Bad science" might be a bit harsh. I read the paper as a call to arms (no pun intended). The data presented in Table 1 is good science
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by sradman 6y ago
The paper Faecal microbiota transplant from aged donor mice affects spatial learning and memory via modulating hippocampal synaptic plasticity- and neurotransmission-related proteins in young recipients [1]: > Only four genera (Prevote
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by sradman 6y ago
From the paper's Introduction: > The regression of the median artery commences at approximately the eighth week of intrauterine life. However, the median artery persists in a considerable number of foetuses of gestation ages 13–38 w
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by sradman 6y ago
Is there a non-intrusive (and hopefully inexpensive) imaging technique that can be used on a living population rather than depending on cadaver dissection? Doppler, ultrasound, or even modified consumer wrist reflective PPG (like in the App
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by sradman 6y ago
> The focus of this study was not to analyse the prevalence of the occurrence of the median artery in relation to ethnicity, geographic origin or variations by sex, but to identify the global trends in its occurrence. Hopefully this pape
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by sradman 6y ago
It is unintuitive that an overnight package sent from Mississauga to Milton would go to Atlanta first, but that is the key insight Fred Smith had when he created FedEx. Regarding the CBC returns featured in the video, the 105 mile detour an
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by sradman 6y ago
Near the end of the CBC Marketplace video, they show a vendor contract and state that the vendor pays either the shipping costs to receive the returned item or the disposal cost otherwise. The reporting seems oblivious to the cost of humans
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by sradman 6y ago
I hear ya. The point I was trying to make is that some private/public consortiums that appear to be regulatory institutions are mostly marketing associations. A quick check is to see if there is a large fee associated with joining and

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