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Can they use waste heat from recycled pre-halving ASICs, instead of or in addition to electric strip heat?

Heat pump "sources": exterior air, interior air, underground loop, underwater loop, electric strip heat, gas, Proof-of-Work waste heat,


FWIU, there are also now All-in-One Washer + Dryer combos?

There have been for some time. There are some issues. A minor one: the max wash load is larger than the max dryable load.

A major one: the act of unloading and reloading gives you a chance to shake out tangles in shirt sleeves and whatnot. If you don't untangle your clothes you'll find they don't dry as well and can fatigue a lot faster!

Dryers are great if you live in the south where things won't dry on their own, or if you need to run laundry fast. If you can afford it, a drying rack works great, is cheap, and is far, far easier on your clothes.


I have one of these and I love it. Takes half as much space in the closet as having a normal washer and dryer and still finishes most loads in a little over two hours as long as I don’t put a crazy amount of stuff in it. I’ve also noticed the water usage is significantly lower than my previous HE washer. Mine is the “GE Ultrafast” one.

Oh yeah. Have been for a while. I run into them a lot when I’m in Italy and still haven’t used one that worked well. Unless you want a load of laundry to take half a day. Then they work fine.

The new ones utilize heat pumps (GE Ultrafast, LG WashCombo), very different than existing ones in European countries.

They are popular in Europe and Asia but are somewhat less effective than separate units.

There are but I have heard that sometime the dryer takes forever to dry... never had one though

SHMT (2024) has a probably faster blackscholes_2d implementation: https://github.com/jk78346/SHMT/blob/main/src/kernels/functi... https://news.ycombinator.com/item?id=39515038

"Python for Finance", 2nd Edition (py4fi2nd) has a chapter on BSM with notebooks and a module: https://github.com/yhilpisch/py4fi2nd/tree/master/code/ch12 https://home.tpq.io/books/py4fi/

GH topic: black-scholes: https://github.com/topics/black-scholes


How does HTTP(S) Same Origin policy work with local file:/// URLs?

TIL there's no `ls -al /usr/share/man/** | man --html`; though it would be easy to build one with Python's http.server, or bottlepy, or bash,.

Prompt: An http server ( with bash and /dev/tcp/ ) that serves HTML versions of local manpages with linkification of URLs and references to other manpages


> How does HTTP(S) Same Origin policy work with local file:/// URLs?

It doesn't since file:/// is just a uri and not part of the http protocol



If I open an HTML copy of a manpage that contains JS from a file:/// URL, can it read other local files and send them to another server with img URLs?

If so, Isn't it thus probably better to run an HTTP server over a permissioned socket than to serve static HTML [manpages] from file URLs [in a [DEB] package]?


file:/// is always going to be local to the machine reading the URI. So if you're serving a page that has a file:/// uri in it and someone on another machine clicks on it, they wont be seeing the file (unless they happen to have the same path on their machine). If the goal is get them that file, then yes, it'll need to be served.

+1

  man git-blame
  git help blame
https://git-scm.com/docs/git-blame

Awesome. Tools and applications for:

"Ask HN: Why don't datacenters have passive rooflines like Net Zero homes?" https://news.ycombinator.com/item?id=37607590 : awesome-fluid-dynamics

"Ask HN: Does mounting servers parallel with the temperature gradient trap heat?" https://news.ycombinator.com/item?id=23033210 :

> Would mounting servers sideways (vertically) allow heat to transfer out of the rack?

"Deep Learning Poised to ‘Blow Up’ Famed Fluid Equations" https://news.ycombinator.com/item?id=31049970 ; jax-cfd

"Zero energy ready homes are coming" https://news.ycombinator.com/item?id=35064493 ; GH topic finite-element-analysis, structural-analysis


JupyterLite's default Python-compiled-to-WASM build has NumPy, SciPy, matplotlib, and SymPy installed; so you can do computer algebra with SymPy in a browser tab.

https://JupyterLite.rtfd.io/

https://github.com/jupyterlite/jupyterlite/tree/main/py/jupy... :

> Initial support for interactive visualization libraries such as: altair, bqplot, ipywidgets, matplotlib, and plotly


SymPy: https://en.wikipedia.org/wiki/SymPy

- "How should logarithms be taught?" [with python and SymPy] https://news.ycombinator.com/item?id=28518565#28519356

From "SymPy - a Python library for symbolic mathematics" (2020) https://news.ycombinator.com/item?id=23767513 :

> NumPy for Matlab users: https://numpy.org/doc/stable/user/numpy-for-matlab-users.htm...

> SymPy vs Matlab: https://github.com/sympy/sympy/wiki/SymPy-vs.-Matlab


"Low-noise balanced homodyne detection with superconducting nanowire single-photon detectors" (2024) https://opg.optica.org/opticaq/fulltext.cfm?uri=opticaq-2-1-... :

> [...] A pertinent example of continuous variables comprise the quadrature representation of the optical quantum state, as opposed to the discrete-variable photon-number representation. The wave-like nature of the field results from the coherence between different photon number components of a field with uncertain photon number. Therefore, to study the wave-like nature of the field, one must be able to measure superpositions of photon number states.

> To do so, the field of a weak optical quantum state (signal) comprising a few photons interferes with the field of a bright coherent state (i.e., a local oscillator, LO) on a balanced beam splitter. The two output modes of the beam splitter are then measured with two photodetectors. By calculating the difference between the detector count rates, which is proportional to the field quadrature at a reference phase provided by the local oscillator, the optical quantum state can be characterized [3–5]. The ability to characterize optical quantum states in their phase-space representation [1] makes homodyne detection an essential tool for quantum information processing with continuous variables [6].

> Typically, conventional semiconductor photodiodes are used as the detector in balanced homodyne detection. The high optical flux arising from the LO lifts the optical signal above the electronic noise floor, which is typically in the pW√Hz range at telecommunication wavelengths. As a result, the generated carriers in the photodiode can be integrated over a characteristic response time, resulting in a photocurrent which is proportional to the incident optical flux [7]. For BHD, it is essential that the photodetector output is directly proportional to the intensity (photon flux) of the input light. In this case, we refer to the detector output as linear.


Single-photon_source#History: https://en.wikipedia.org/wiki/Single-photon_source#History :

> As well as NV centres and molecules, quantum dots (QDs),[14] quantum dots trapped in optical antenna,[15] functionalized carbon nanotubes,[16][17] and two-dimensional materials[18][19][20][21][22][23][24] can also emit single photons and can be constructed from the same semiconductor materials as the light-confining structures. It is noted that the single photon sources at telecom wavelength of 1,550 nm are very important in fiber-optic communication and they are mostly indium arsenide QDs.[25] [26] However, by creating downconversion quantum interface from visible single photon sources, one still can create single photon at 1,550 nm with preserved antibunching. [27]

"A physical [photonic] qubit with built-in error correction" (2024) https://news.ycombinator.com/item?id=39243929 :

> "Logical states for fault-tolerant quantum computation with propagating light" (2024)


> it is essential that the photodetector output is directly proportional to the intensity (photon flux) of the input light

From "Physicists use a 350-year-old theorem to reveal new properties of light waves" (2023) https://news.ycombinator.com/item?id=37226121#37226160 :

>> "This means that hard-to-measure optical properties such as amplitudes, phases and correlations—perhaps even these of quantum wave systems—can be deduced from something a lot easier to measure: light intensity."


"Neutron capture reaction cross-section of 79Se through the 79Se(d,p) reaction in inverse kinematics" (2024) https://www.sciencedirect.com/science/article/pii/S037026932... :

> One way of handling such long-lived fission products is to neutralize waste through nuclear reactions [1], [2], [3], [4]. Decommissioning nuclear waste by employing high flux accelerators [1], [4] and fast reactors [2], [3] has been proposed. However, to design such facilities, reaction cross-sections in a wide energy range are indispensable.

Neutron capture for transmutation.


From "The Federal Helium reserve is for sale" (2023) https://news.ycombinator.com/item?id=37391584 :

> Again, Helium-3 is a viable nonradioactive input to nuclear fusion reactions


"The War over Burying Nuclear Waste in America's Busiest Oil Field" (2024) https://news.ycombinator.com/item?id=39422590 :

> $100 ball of Thorium = 100 years of energy. [For one person]


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