If you'd like to test with the Kubernetes provider, you'll have to install
it with this command:
pip install --upgrade apache-airflow-providers-cncf-kubernetes==4.0.0
--no-deps
pip doesn't like the combination of `>= 2.3.0` on the provider and
`2.3.0b1` in this snapshot.
Here is a link to the dev docs for the new Dynamic Task Mapping feature
(AIP-42):
http://apache-airflow-docs.s3-website.eu-central-1.amazonaws.com/docs/apache-airflow/latest/concepts/dynamic-task-mapping.html
Jones Beene wrote:
> very low power density now - plenty of room for improvement
>
Can it be improved? The temperature difference is so low, I am surprised a
thermoelectric gadget produces measurable current. In a third world rural
setting, it might make more sense to burn firewood or kerosene
I should explain that in Atlanta, when they install a heat pump, they
include a small, auxiliary, el-cheapo gas fired furnace along with it. It
seldom turns on. I don't know about Florida and other warm places.
In rural Japan where the walls are made of paper, they used to heat with
kerosene
H LV wrote:
> When temperatures fall to 25 to 30 degrees, a heat pump loses its spot as
>> the most efficient heating option for an Atlanta home.
>>
>>
> Apparently heat pumps have improved a lot over the last decade. This
> article says they now work well down to -10F or lower.
>
I looked at
t implementing automation in CI as a trade-off
> between:
> > >>
> > >> * automating intentions of what we want to do (and teach people to
> > >> react to errors)
> > >>
> > >> vs.
> > >>
> > >> * explain
C/C++ integer hierarchy was a mistake, with the language-specified types
overlapping and the size-specific (int64_t) being typedefs. So long is
"different" from long long even if they're both 64-bit signed integers.
I think they should test that sizeof(HYPRE_Int) == sizeof(PetscInt), but not
Yes, it's automatic when you use methods that have triangular solves, such as
the default (incomplete LU).
Peter Kavran writes:
> Dear team,
>
> Could you tell me whether the method described in the paper:
>
> BARRY SMITH AND HONG ZHANG - SPARSE TRIANGULAR SOLVE REVISITED: DATA LAYOUT
>
H LV wrote:
However, there has been a big push to instead choose more efficient heat
> pumps. The Canadian Institute for Climate Choices report found that to
> drive deeper emissions cuts, the switch to heat pumps "would play an
> essential and growing role.""
>
As I said, I am surprised heat
Dear PETSc community,
The DOE Office of Science has offered to supplement current projects to support
collaboration and hosting of students, postdoctoral researchers, and scientists
who have been impacted by the conflict in Ukraine. This can include support via
European universities. Details
Dear PETSc community,
The DOE Office of Science has offered to supplement current projects to support
collaboration and hosting of students, postdoctoral researchers, and scientists
who have been impacted by the conflict in Ukraine. This can include support via
European universities. Details
+1 (binding)
Checked signatures, checksums, and licences
H LV wrote:
Oil and gas furnaces are now being banned in new construction projects in
> parts of Canada.
>
What are they installing instead? Surely heat pumps don't work in most of
Canada.
Are they putting in resistance heaters? Those are extremely efficient. I
find it hard to believe they
I wrote:
> It resembles airplane seats available between midnight and 8 a.m. They are
> discounted because few people want to fly "red eye" at those hours . . .
>
Note that airlines have to fly some number of airplanes at night, to
position them for service the next day. They cannot terminate
H LV wrote:
Yes, it will. There is no market for electricity at night.
>>
>
> There is no market currently, but if more and more electricity is being
> demanded at night wouldn't that create a market?
>
Yes, as I said, if nighttime consumption increases, I expect they will
tweak the rates to
Here is one of many examples of free nighttime electricity in Texas:
https://comparepower.com/electricity-rates/texas/free-electricity/
There is a lot of competition in the Texas electric power market, so many
companies offer this.
As I said, this is a good business model, not a favor to the
CB Sites wrote:
I will confirm what @Jed Rothwell is saying as an
> EV owner. 90% of my travel is inner city 30miles or less all stop and
> go. Just an overnight charge on a 110v plugin charger and good to go.
> I've not seen a noticble change in my electric bill. It's lik
Chris Zell wrote:
As things now stand, automobile drivers are getting a free ride. That's not
> fair.
>
> Toll roads/bridges? License/registration fees? Gasoline taxes?
I don't know. We should see how they do it in London, England.
I paid a bridge toll in New York state just by driving past
Regarding hydrogen vehicles and safe fission reactors, over at LENR Forum I
wrote:
It may be possible to develop safe fission reactors. I cannot judge. Some
experts say pebble bed reactors might be safe. However, we know for a fact
that solar panels are safe, and they can produce electricity much
H LV wrote:
"Free rider."
>
> I think public transport should be free too.
> but of course it won't really be free. The costs will be borne by the
> taxpayer.
>
Public transport is a lot cheaper than roads, highways and the damage
caused by automobiles. So it would be best to make public
It's sort of available (see -dm_plex_gmsh_use_regions), but we still plan to
support a better version of the translation you want. I'd have done it long
ago, but have had more urgent things.
https://gitlab.com/petsc/petsc/-/issues/689
If you'd like to start a merge request on this, we can
I wrote:
> I don't see the point. Why spend four times more money than you need to?
> Electric cars are far cheaper per mile.
>
It is actually 5.6 times more money per mile, because the power companies
offer a huge discount for recharging overnight. In Atlanta, the power
company estimates it
I wrote:
> Nearly all new generating capacity is renewable, because that is almost
> the cheapest. Aeroderivative natural gas is the cheapest at $1,294 base
> overnight cost, but solar PV is $1,327. . . .
>
See also:
Solar power will account for nearly half of new U.S. electric generating
H LV wrote:
> What on earth do you mean?
>>
>>
>
> A few examples:
> --Volatile organic compounds
>
> https://www.epa.gov/indoor-air-quality-iaq/volatile-organic-compounds-impact-indoor-air-quality
>
> --Farming without disturbing soil could cut agriculture’s climate impact
> by 30%
>
>
Jürg Wyttenbach wrote:
> Toyota has sold more than 50'000 Hydrogen fuel cell powered cars.
>
Where did you find that number? They have sold 9,978 in the U.S., which is
more than I expected.
https://www.goodcarbadcar.net/toyota-mirai-sales-figures-usa-canada-monthly-yearly/
I think there is no
David L. Babcock wrote:
Is anyone considering bottled hydrogen sold at gas stations?
>
I think that would cost a great deal of money. It takes a lot of gas to
power an automobile. Think about how large the underground tanks of
gasoline are in a regular gas station.
In Japan they have tried a
H LV wrote:
Everything we do involves gaseous exchanges with the atmosphere.
>
What?!? Solar and hydroelectricity do not. Wind power does, in a sense, but
it does not measurably affect the wind (the movement of air heated by the
sun). Fission definitely does not involve gaseous exchanges,
H LV wrote:
> I don't mean to sound pedantic but the term "chemically fueled" could
> apply to just about any vehicle except one powered by nuclear power.
>
I don't mean to sound pedantic, but all cars are nuclear powered. Fossil
fuel cars are powered by the sun's fusion millions of years ago;
Terry Blanton wrote:
https://www.recurrentauto.com/research/how-temperature-affects-ev-range
>
A cold outdoor temperature has a drastic effect on a Prius or a purely
electric car. But the air conditioner does not.
With a Prius in winter, efficiency is very low until the engine warms up,
after
Robin wrote:
I have been wondering by how much does heating/aircon lower the range of
> electric vehicles? Anyone have a rough idea?
>
Hardly any. Soon after the Prius was introduced, some engineers studied
this when trying to achieve miles per gallon distance records. As I recall,
in most
Jones Beene wrote:
> Prior to this there had been and remains a nascent movement around the
> idea that hydrogen made from wind or solar was going to be our savior on
> the energy front - despite the intractable poor economics involved in the
> manufacture and storage.
>
The economics are
This discussion group began long ago with discussions of vortex-induced
cavitation, also known as sonofusion. Examples include the work of Roger
Stringham and the hydrodynamics gadget (https://www.hydrodynamics.com/).
(Look up Stringham in the LENR-CANR.org index,
Sundials, for example.
PETSc is still relatively low in the software stack. If everyone is making
biannual releases for ECP, then we'd need a topological sort on dependencies
and PETSc would need to release (or at least freeze) early, e.g., January or
February, so other packages have time to
+1 (binding)
I gave it a spin in the helm chart.
On Thu, Mar 31, 2022 at 10:21 AM Josh Fell
wrote:
> +1 (non-binding)
>
> Verified a few bug fixes, ran some DAGs using core modules.
>
> On Thu, Mar 31, 2022 at 10:37 AM Jarek Potiuk wrote:
>
>> +1 (binding) - checked signatures, licences,
be large for 3D problems)
>>>>> * Now hypre's mesh setup is definitely better that GAMG's and AMGx is
>>>>> out of this world.
>>>>> - AMGx is the result of a serious development effort by NVIDIA about
>>>>> 15 years ago with many 1
https://bugs.kde.org/show_bug.cgi?id=451932
Bug ID: 451932
Summary: Skanlite crashes when scanning (not previewing)
Product: Skanlite
Version: 21.12.3
Platform: Neon Packages
OS: Linux
Status: REPORTED
+1 (binding)
Checked signatures, checksums, and licences
Robin wrote:
I thought I just read in one of the papers recently posted on Vortex that
> preparation of the surface involved oxidizing
the metal. That would make sense if reacting it with Hydrogen resulted in
> the creation of nascent water molecules that
> then act as Hydrino catalysts.
I
A potential problem with this idea is that the hydrogen (or deuterium) has
to be highly pure. When you split water, you usually end up with impurities
and some oxygen mixed in with the hydrogen. You have to use high tech
equipment to purify it. You probably would not want to put water into a
cold
Robin wrote:
> A gram of Hydrogen represents the explosive power of about 30 gm of TNT.
> Several hundred grams of Hydrogen would equate
> to about 9 kg of TNT. That's a little more than a pop under the hood.
>
Well, if it is a problem, I suppose they could use 20 g instead of 100. The
point
Jones Beene wrote:
> Most viable concepts for commercial vehicles which would utilize LENR need
> to have efficient water-splitting as part of the package. Compressed
> hydrogen gas as the alternative - that is probably a non-starter for safety
> reasons,
>
Do you mean the hydrogen or
The question is about vectors. I think it will work, but haven't tested.
Barry Smith writes:
> We seem to be emphasizing using MatSetValuesCOO() for GPUs (can also be for
> CPUs); in the main branch you can find a simple example in
> src/mat/tutorials/ex18.c which demonstrates its use.
>
>
-march=native, which is also recognized by the new Intel compilers (icx), which
are based on LLVM.
Ernesto Prudencio via petsc-users writes:
> Hi all.
>
> When compiling PETSc with INTEL compilers, we have been using the options
> "-Ofast -xHost". Is there an equivalent to -xHost for GNU
Robin wrote:
> Just Google atomic or molecular self-assembly.
>
I don't see how this could apply to making a cathode. Perhaps you could
explain in a little more detail?
Robin wrote:
> I wonder if atomic/molecular self-assembly could be used to create uniform
> structures of exactly the right size and
> shape for the NAE?
>
What do you mean by "self-assembly"? What RNA and ribosomes do?
Here is a preprint of an ICCF-23 paper:
Storms, E. *The Nature of the D+D Fusion Reaction in Palladium and Nickel
(preprint)*. in *ICCF-23*. 2021. Xiamen, China.
https://www.lenr-canr.org/acrobat/StormsEthenatureob.pdf
Could you explain more of what you mean by "local matrix"? If you're thinking
of finite elements, then that doesn't exist and can't readily be constructed
except at assembly time (see MATIS, for example). If you mean an overlapping
block, then MatGetSubMatrix() or MatGetSubMatrices(), as used
Years ago, Peter Hagelstein wrote one of the best essays I know of about
science and human nature:
https://www.lenr-canr.org/acrobat/Hagelsteinontheoryan.pdf
He wrote another wide-ranging paper in JCMNS 35:
"Theory and Experiments in Condensed Matter Nuclear Science"
; mentioning already exist?
>
> Or you are simply sketching out what is going to be needed?
>
> Thank you,
>
> -Alfredo
>
>
> On Thu, Mar 10, 2022 at 3:40 PM Zhang, Hong wrote:
>
>>
>> > On Mar 10, 2022, at 2:51 PM, Jed Brown wrote:
>&
Would the order be inferred by the number of vectors in TSBDFSetStepVecs(TS ts,
PetscInt num_steps, const PetscReal *times, const Vec *vecs)?
"Zhang, Hong" writes:
> It is clear to me now. You need TSBDFGetStepVecs(TS ts, PetscInt *num_steps,
> const PetscReal **times, const V
I meant:
JOURNAL OF CONDENSED MATTER NUCLEAR SCIENCE *Vol. 35* is uploaded.
ttps://www.lenr-canr.org/acrobat/BiberianJPjcondensedzh.pdf
+1 (binding)
Checked signatures, checksums, and licences
+1 (binding)
JOURNAL OF CONDENSED MATTER NUCLEAR SCIENCE Vol. 34 is uploaded.
https://www.lenr-canr.org/acrobat/BiberianJPjcondensedzh.pdf
doubt it is the best
>> solution to Alfredo’s problem. Alfredo, can you elaborate a bit on what you
>> would like to do? TSBDF_Restart is already using the previous solution to
>> restart the integration with first-order BDF.
>>
>> Hong(Mr.)
>>
>> > On M
Can you restart using small low-order steps?
Hong, does (or should) your trajectory stuff support an exact checkpointing
scheme for BDF?
I think we could add an interface to access the stored steps, but there are few
things other than checkpointing that would make sense mathematically. Would
Good points Jarek. I mentioned it in the initial email, but I think we
should keep it optional to start with. I'd rather get the basics in place
first, as I think we are going to find some interesting scenarios as we try
and put rules around it. Even if only release managers touch it in the
short
Thanks Kaxil!
Here is a specific example from pip, a bugfix in 22.0.3 (note the file
added to `news`):
https://github.com/pypa/pip/pull/10869/files
Which is moved from that news file to NEWS.rst here during release (note
the `news` deletions):
New cool doc section (#)
```
Commit the newfragments (`git add chart/newsfragments && git commit -m
"demo" -n` ), then remove the `--draft` flag and observe the fragments are
deleted and the release notes are in `chart/RELEASE_NOTES.rst`.
Thanks,
Jed
I regret to announce that Charles Entenmann died on February 24, 2022. See:
http://www.infinite-energy.com/resources/charles-entenmann.html
https://www.legacy.com/us/obituaries/newsday/name/charles-entenmann-obituary?id=33396300
I think SNESLineSearchApply_Basic will clarify these points. Note that the
pre-check is applied before "taking the step", so X is x_k. You're right that
the sign is flipped on search direction Y, as it's using -lambda below.
/* precheck */
ierr =
Ivermectin improves the prognosis for patients infected with parasites. It
does nothing to prevent or cure COVID. Double blind tests of ivermectin
only show positive results in places where parasites are widespread, such
as India. See:
newsfragments
- Minor tweaks to some other release-manager specific tooling (e.g. chart
artifacthub changelog generator)
Please check out the feature branch and experiment! I'm eager to hear your
feedback.
https://github.com/apache/airflow/pull/22003
Thanks,
Jed
+1 (binding)
Verified signatures (though I signed them), licenses, and checksums. Ran
through a couple installs with different config and ran a DAG.
This is a small problem for which direct Householder QR may be fast enough
(depending on the rest of your application). For multi-node, you can use TSQR
(backward stable like Householder) or Cholesky (unstable).
julia> A = rand(20, 200);
julia> @time Q, R = qr(A);
0.866989 seconds (14
I wrote:
> I asked them if they plan to give out more than one prize. I will report
> back if they respond.
>
They say they haven't decided yet. They have not decided the prize amount
either, contrary to what Celani reported.
I wrote:
> Maybe they plan to give more than one prize. It says $2 million or $3
> million. Maybe that means $2 million to one person and another $1 or $2
> million to another.
>
I asked them if they plan to give out more than one prize. I will report
back if they respond.
Jones Beene wrote:
Time's a wasting. This prize should be claimed by someone we know, no?
>
Maybe they plan to give more than one prize. It says $2 million or $3
million. Maybe that means $2 million to one person and another $1 or $2
million to another.
>
Jürg Wyttenbach wrote:
> Only a fool would sell the Gates/Page blood suckers a working LENR
> reaction.
>
If they are giving a prize with no strings attached, why not show them the
reaction? As long as they do not demand a share of the intellectual
property, what harm can they do?
> And of
revent such crashes.
>
>> On Feb 27, 2022, at 4:24 PM, Jed Brown wrote:
>>
>> I assume this would be running VecWAXPY on CPU (and GPU) with some empty
>> ranks? I'd be mildly concerned about allocating GPU memory because a crash
>> here would be
econds it could automatically run a few levels of streams
> (taking presumably well less than a few seconds) and adjust suitable the
> output. If the user runs, for example, 10min they surely don't mind .5
> seconds to get more useful information.
>
>
>
>> On Feb 27, 2022
Probably not implied by -log_view alone, but -streams_view or some such doing
it automatically would save having to context switch elsewhere to obtain that
data.
Barry Smith writes:
> We should think about have -log_view automatically running streams on
> subsets of ranks and using the
This is pretty typical. You see the factorization time is significantly better
(because their more compute-limited) but MatMult and MatSolve are about the
same because they are limited by memory bandwidth. On most modern
architectures, the bandwidth is saturated with 16 cores or so.
Is there a reason that the twederation plugin doesn't work?
https://github.com/inmysocks/TW5-TWederation/tree/master/Federation-core
On Wednesday, February 23, 2022 at 11:59:41 PM UTC+1 cj.v...@gmail.com
wrote:
> https://youtu.be/IKJZEKJp9Ck
>
> A short video to introduce a first step in a
At the DARP workshop Francesco Celani said that the Anthropocene Institute
is offering a $2 million prize for a "simple/reproducible LENR experiment."
I do see anything about this at https://www.iccf24.org/
There is one slide about it here:
Have you tried Bob?
You can get around all the setup by using the executable version. The
newest version is here
https://github.com/OokTech/TW5-BobEXE/releases/tag/1.7.3b1
Just download the executable for your system, put it in a folder and run it.
On Wednesday, February 23, 2022 at 6:56:50
It would be good to report a reduced test case upstream. They may not fix it,
but a lot of things related to static libraries don't work without coaxing and
they'll never get fixed if people who use CMake with static libraries don't
make their voices heard.
"Palmer, Bruce J via petsc-users"
here for more details:
https://airflow.apache.org/docs/apache-airflow/2.2.4/changelog.html
Container images are published at:
https://hub.docker.com/r/apache/airflow/tags/?page=1=2.2.4
Thanks,
Jed
here for more details:
https://airflow.apache.org/docs/apache-airflow/2.2.4/changelog.html
Container images are published at:
https://hub.docker.com/r/apache/airflow/tags/?page=1=2.2.4
Thanks,
Jed
Hello,
Apache Airflow 2.2.4 (based on RC1) has been accepted.
3 “+1” binding votes received:
- Jed Cunningham
- Kaxil Naik
- Ephraim Anierobi
Vote thread:https://lists.apache.org/thread/pgxczr9qdnfqptxg7k6op518l0yk429z
I'll continue with the release process, and the release announcement
The website for ICCF-24 has been updated to include the Call for Papers and
other items.
https://www.iccf24.org/
If you can share before/after output from -log_view, it would likely help
localize.
Another unintrusive thing (if you're allowed to run Linux perf) is to
$ perf record --call-graph dwarf -F99 ./app
[... runs ...]
$ perf script | stackcollapse-perf | flamegraph > flame.svg
and open flame.svg in
+1 (Binding)
Verified licenses, signatures, and checksums.
bout context usage in Python/@task (#18868)
- Clean up dynamic `start_date` values from docs (#19607)
- Docs for multiple pool slots (#20257)
- Update upgrading.rst with detailed code example of how to resolve
post-upgrade warning (#19993)
*Misc*:
- Deprecate some functions in the experimental API (#19931)
- Deprecate smart sensors (#20151)
Thanks,
Jed
We need to make these docs more explicit, but the short answer is configure
with --download-kokkos --download-kokkos-kernels and run almost any example
with -dm_mat_type aijkokkos -dm_vec_type kokkos. If you run with -log_view, you
should see that all the flops take place on the device and
Note that operations that don't have communication (like VecAXPY and
VecPointwiseMult) are already non-blocking on streams. (A recent Thrust update
helped us recover what had silently become blocking in a previous release.) For
multi-rank, operations like MatMult require communication and MPI
See: https://www.lenr-canr.org/acrobat/PanethFthepublica.pdf
The Publications of Fritz Paneth and Kurt Peters: Precursor to the
Discovery of Cold Fusion
Contents
Introduction.
Paneth, F. and K. Peters, On the transmutation of hydrogen into helium.
Ber., 1926. 59: p. 2039 (translation).
Paneth,
+1 (Binding)
Verified licenses, signatures, and checksums.
VecDuplicateVecs isn't implemented in petsc4py, but it internally just loops
over VecDuplicate so you can use
qs = [x.duplicate() for i in range(4)]
y.maxpy(alphas, qs)
where the Python binding here handles qs being a Python array.
Samar Khatiwala writes:
> Hello,
>
> I’d like to create an
hew and Jed,
>
> Brilliant. Thank you so much!
>
> Your changes work like a charm Matthew (I tested your branch on the gmsh
> file I sent) and thank you so much for your advice Jed. The loss of one
> order of convergence for an inf-sup stable pressure discretization seems
>
Susanne, do you want PetscFE to make the serendipity (8-node) finite element
space or do you just want to read these meshes? I.e., would it be okay with you
if the coordinates were placed in a Q_2 (9-node, biquadratic) finite element
space?
This won't matter if you're traversing the dofs per
CB Sites wrote:
> I really like how the Chubb brothers worked on it from the solid state POV.
>
(It was uncle Talbot and his nephew Scott, both deceased.)
+1 (binding)
s
> actually not allocate the nonzeros and just stores the nonzero structure. But
> if this is not the case then of course I just duplicate the matrix.
>
> Thanks for the feedback.
>
>> Gesendet: Donnerstag, den 03.02.2022 um 03:09 Uhr
>> Von: "Jed Brown"
>> A
s
> actually not allocate the nonzeros and just stores the nonzero structure. But
> if this is not the case then of course I just duplicate the matrix.
>
> Thanks for the feedback.
>
>> Gesendet: Donnerstag, den 03.02.2022 um 03:09 Uhr
>> Von: "Jed Brown"
>> A
"Evstafyeva,Tamara" writes:
> Thanks for your prompt reply. I am attaching the makefile; the line for
> execution “make all -j 4”
>
> I guess using both was my attempt at trying multiple things until they work –
> using either one or the other produced the same error for me.
petsc.pc isn't
Hmm, usually we don't use BOTH the makefile includes and pkgconfig (as in
Makefile.user). You can use either. If you share the whole file and the command
line that executes, I think it'll be easy enough to fix.
"Evstafyeva,Tamara" writes:
> To whom it may concern,
>
> I am using a code that
The other day Francesco Celani and his friend asked me if I know of any
papers that discuss the role of H in the bulk Pd cold fusion. Can H enhance
the reaction? Is there an H-D reaction? I said I don't recall any papers
like that. It turns out they already found one, which I added to the
library:
Marius Buerkle writes:
> Thanks for they reply. Yes the example works, this is how I was doing it
> before. But the matrix is rather big and i need a matrix with the same
> structure at various points in my code. So it was convenient to create the
> matrix with preallocate, destroy it after
Marius Buerkle writes:
> Thanks for they reply. Yes the example works, this is how I was doing it
> before. But the matrix is rather big and i need a matrix with the same
> structure at various points in my code. So it was convenient to create the
> matrix with preallocate, destroy it after
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