Re: [Origami] Origami Sighting - Lexus Comercial

[Scott Cramer]

On Mon, Mar 26, 2018, at 4:04 PM, David Mitchell wrote:


> There are also the triakis polyhedra which can be derived through this 
> process, though they appear to be special instances

I believe the -kis polyhedra (triakis, tetrakis, pentakis) are derived by 
raising the centers of the faces of the original polyhedra so as to form 
triangular faces of a constant  dihedral angle. By contrast, some of the 
Archimedean solids have different dihedrals depending on which types of 
polygons meet at an edge.

The website http://dmccooey.com/polyhedra/ has interactive models of hundreds 
of polyhedra in amazingly abstruse categories, and exhaustive data on each. The 
interface could be a little more user friendly, but clicking on the boxes and 
playing around a bit is worth the effort. 

Scott 

Re: [Origami] Origami Sighting - Lexus Comercial

[David Mitchell]

From: Robert Lang  indited:

>In 1509, Luca Pacioli and Leonardo da Vinci put together a book, "La Divina 
>Proportione," in which they introduced the concept of erecting a pyramid on 
>each face of a >polyhedron (which is what is effectively happening in a Sonobe 
>solid) and they called the operation "Elevation." So Sonobe solids would be 
>(according to that terminology) >"elevated polyhedra," and that's the term 
>I've used when describing modulars with that form. Here's a Bridges paper that 
>gives details:

There do seem to be lots of names for similar aspects of this process. So ... 
as a non-mathematician I venture intrepidly into mathematical territory ... 
happy to have my misconceptions and mistakes pointed out.

At least the following possibilities seem to exist:

Elevation

Accretion

Cumulation

Akisation (from the Conway operator kis)

Kleetope

Pyramidisation or pyramid-augmentation

There are also the triakis polyhedra which can be derived through this process, 
though they appear to be special instances, as are those stellated polyhedra 
which can also be derived in this way.

George Hart suggests that elevation is also a special instance, the addition of 
pyramids with equilateral faces, but I do not know if this is an authoritative 
view.

I am not clear what the process of forming a Kleetope is and whether it is a 
specific process or a general one.

Of the remaining general terms I tend strongly towards cumulation because it 
means, or can mean, 'forming into a pile' which seems to make sense in terms of 
the process. 

Negative cumulation? Surely not? Excavation, perhaps?

And then, of course, I have myself been using pimpled and dimpled for years!

Dave

Re: [Origami] copyright question about modification of traditional origami model

[Anne LaVin]

On Mon, Mar 26, 2018 at 12:11 AM, Hadi Tahir via Origami <
origami@lists.digitalorigami.com> wrote:

>
> i've made a video tutorial on youtube about origami sampan, based on a
> modified tradiotional origami sampan.
> here is the diagrams: https://haditahir.wordpress.
> com/2016/04/19/origami-perahu-sampan/
> well, i've never claimed that it is my design, since it doesn't differ
> much from the original origami sampan, and i still consider it just a
> modified traditional model that everybody can use for free.
>
> but a month ago, someone sent me a message, that my video infringes
> someone's copyright (http://www.origami-make.org/
> origami-boat-large-sampan.php (published on December 1, 2010)) which i
> have never known before, and asked me to remove the video.
>
> can anybody give me an advise of what i should do? should i remove the
> video, or should i keep it and give some explanation about the case?
>

By my understanding, if something does not have a copyright (e.g. a
traditional origami design, like the Sampan) then if you make some kind of
copy of it, *your new copy cannot have a copyright, either*. If you manage
to add something new/creative to the work, then your copyright would be
*only* in that new, creative bit, but not the traditional parts. And if you
came up with the new, creative stuff independently from someone else, then
you do have your own rights to that new part.

So if their video is just a video of the traditional sampan design, they
cannot have any copyright in their video, except those features of the
video which could be deemed new and, especially, creative. If theirs is a
similar modification to yours, and you both came up with it independently,
then you both have the right to create instructions for it.

If your video does not look like theirs - does not look like a *copy* of
theirs - but is just a video instruction of your sequence of folds of the
sampan, with some modifications... then I don't think they can complain.

And given Youtube's general position on video-re-diagramming of
otherwise-published pieces, I would say they would support you in this. If
you are not distributing a *copy* of these other people's video, but your
own version, then this is no different from people who do video
instructions for things published elsewhere in print - which we know
Youtube allows. So it would seem to me you're fine either way. Worst case,
really, is that the other people complain to Youtube, and Youtube could
take your video down. But I think you'd have a strong case for your own
rights to produce the video, and could counter any complaints.

But, of course, I am not a lawyer. If you're really concerned, you need to
seek an actual attorney's advice.

Anne

Re: [Origami] copyright question about modification of traditional origami model

[Hans Dybkjær]

Den 26. mar. 2018 kl. 06.11 skrev Hadi Tahir
> 
> modified tradiotional origami sampan.
> here is the diagrams: 
> https://haditahir.wordpress.com/2016/04/19/origami-perahu-sampan/

>  a message, that my video infringes someone's copyright 
> (http://www.origami-make.org/origami-boat-large-sampan.php (published on 
> December 1, 2010)) which i have never known before, and asked me to remove 
> the video.

Dear Hadi,
You have a nice site, and I like your diagrams. A cleaner site than the other 
which bubbles over with annoying ads. 

It is a common situation doing simple models, and even more so with simple 
variations over traditional models. I have tried both ways, and managed to come 
to with the other part, except in a couple of cases where I deemed the 
counterpart too difficult to contact and just removed my diagram - in the end 
it is easier to make other designs, even if it was something you were proud of.

You could try to ask back kindly, suggesting that you make an acknowledgment of 
the preceding creation and a link to his/hers site? Maybe even suggest that you 
remove the video and keep the diagram? As he only asked you to remove the video?

By the way, in 2013 I wrote an article for the BOS Magazine 286, “On design 
variations” which included the guideline “Change the orientation of the crease 
pattern on the paper.”, incidentally precisely your case. I propose that 
henceforth I have dibs and copyright on any model obtained from other models 
using this and other techniques mentioned in the article :-)

Good luck,
Hans

Hans Dybkjær
Site: papirfoldning.dk
Society: foldning.dk

[Origami] . Is it okay to fold real bank notes?

[Chamberlain, Clare]

>I wanted to know the opinion of the O-list members regarding folding origami 
>models with bank notes or Moneygami.

>Do you think it is okay to fold the real bank notes into origami models?
.Considering that some would say that it damages it and shortens its life 
cycle, is it okay to fold and encourage others/students to do moneygami with 
real banknotes?

Hi Ali

I remember that it was frowned upon in Japan - partially because it was 
defacing currency, but largely because it was literally defacing the faces of 
important dignitaries depicted on the paper. Maybe some monarchists in UK might 
feel the same with the queen.

I also remember at the first Australian origami conference, a Japanese folder, 
possibly Kamiya Satoshi, folding a polymer note after we said it couldn't be 
done!

I also understand that money folding is far more popular in USA because of the 
culture of tips - now that we're all moving to cards for payment and even 
bus/train tickets, we've lost a lot of material for 'spontaneous' folding.

Clare

[Origami] copyright question about modification of traditional origami model

[Hadi Tahir via Origami]

Hi All,

i've made a video tutorial on youtube about origami sampan, based on a modified 
tradiotional origami sampan.
here is the diagrams: 
https://haditahir.wordpress.com/2016/04/19/origami-perahu-sampan/
well, i've never claimed that it is my design, since it doesn't differ much 
from the original origami sampan, and i still consider it just a modified 
traditional model that everybody can use for free.

but a month ago, someone sent me a message, that my video infringes someone's 
copyright (http://www.origami-make.org/origami-boat-large-sampan.php (published 
on December 1, 2010)) which i have never known before, and asked me to remove 
the video.

can anybody give me an advise of what i should do? should i remove the video, 
or should i keep it and give some explanation about the case?

thank you very much :)