What a mesh

Waste bin in hotel bedroom.

7 October 2008, originally uploaded by Chalkhills Collective.

The workshop entitled "1st Workshop on Wireless Broadband Access for Communities and Rural Developing Regions" is part of the 1st International Conference on "M4D": Mobile communication technology ForDevelopment .

HumanIT are encouraging contributions including but not limited to topics listed below:

* Cost-effective Rural, Urban and Community Wireless and Mesh Networks
* Long distance and low power wireless network deployments
* Power-Efficient Wireless Networks and Mobile Systems
* Opportunistic Communication Paradigms
* Social Networks meet Wireless
* Planning and Deployment of Community and Municipality Wireless Networks
* Business Models and Economics of Community and Rural Wireless Networks
* Applications and Services for Communities, Cross-layer design for
localized communication
* Case Studies and Testbeds

Other blogposts about: Broadband, bredband, wireless, HumanIT, E-CLIC, Network

so the idea is this.

A. we have a mesh. *(base mesh) which we will use to to determine where the "blobs" appear.

B. we will get the normals of each vertex.

c. then the slicing planes should be generated. (here u can look at my old post or drawings beneath)

here comes the first problem. what i want to find out - is there a way to limit this "slice plane's " effect. here no one will understand me, so lets have a look at the picture:

Here we have a blob mesh, and a slice tool. the white plane is a slice plane, and green line is outline which is generated. the problem is that the green outline goes out of boundaries of slice plane, and correct me if iam wrong but iam sure algorithm behind this procedure works this way. so what we would like to have here would look like this:

Ok how to do it ? i have no clue. It might require rewriting all algorithms behind this operation, or doing it old way, and then subtracting unneeded parts. which is probably easier.

so now lets imagine our slicing works like we want it, and lets move on.

so in order to understand my "hand" drawings here is another diagram for explanation:

so this diagram shows a mesh we will be thinking about. in next drawings i draw only 3 vertexis out of this mesh. In this image we can also see averaged normals (left)cos normally each plane is plane :) so all 4 vertexies should like in image on right. but we can get average values.

you can enlarge this image to see better. but the idea is to make planes for each vertex separately.

so here as well we have problems. first of all we would want to arrange planes so the would make a "continuity" i mean they would go like this: /\/\/\/\/\/\ shit i have no idea how to explane.... look at the drawings again. chm.... please tell me if anyone understands what i am talking about ? ah? anyone?

so and last step would be to "weld" vertexies who are very close to each other.

again i wonder how easy it would be to make so many "restricted" planes for slicing.

but from what i understand, if it would work it could improve mesh topology or?

any ideas?

 Judith and I spent a fascinating day at the Fishing Heritage Centrein Grimsby at Alexander Dock: we took masses of photos and spent hours chatting to a retired trawler-man who had given us a guided tour of the Ross Tiger (trawler now permanently moored at the dock).  The whole day was quite an eyeopener for a landlubber like me, I had no clue about the conditions the fishermen worked under, and cannot begin to imagine what it might have been like for them in the middle of the North Sea in winter trawling for non existent fish.

We emerged with plenty of inspiration, and a desire to find some lunch!  As the Heritage Centre appears to have been built in Sainsbury's car park, we availed ourselves of the facilities and took our lunch to Cleethorpes for a bit of old fashioned sea side, complete with old fashioned rock and candy floss shop.

The sun shone,  we strolled, we people-watched, we avoided the starlings and gulls, and we relished the feel of the silky soft sand on the beach.  I can't remember experiencing such soft sand, but the water did not look too good though - brown frothy scum everywhere.  There was a wonderful holiday feel to the day, and we almost forgot the time and I was late collecting my son.

[caption id="attachment_210" align="aligncenter" width="300" caption="Experiments with Moulding Mesh"][/caption]

[caption id="attachment_211" align="aligncenter" width="300" caption="Oooze! and Moulding Mesh"][/caption]

Link del curso: WILAC

http://www.4mations.tv/clip.aspx?key=F2804D20D9B49432

Roofnet nodes are located in buildings throughout Cambridge, MA, hosted by individual users. Since these users need to be able to simply connect the node to their computer via Ethernet, the node is self-configuring by assigning addresses, finding gateways, and determining the best multi-hop routes. The node keeps track of which gateway has the best route for each open TCP connections; a new best route can be used for new connections. Roofnet has a routing protocol called Srcr that aims to find the best throughput route between nodes, using various techniques like forwarding link metric information in the packet itself. Routes are choosen with an estimated transmission time (ETT) metric: total time it would take to send a packet on a route considering each link's highest throughput rate and the likelihood of achieving it.

There were some interesting points in the evaluation. Despite having omni-directional antennas making lots of links, Srcr uses a small number of the short links. Their multi-hop feature suffered from inter-hop collisions and thus didn't perform as well as they predicted. I liked the discussion of Roofnet successfully using the mesh architecture by routing to "useful" nodes with many neighbors. Roofnet, however, is very vulnerable to loss of valuable links: when removing the best two nodes, throughput decreases by 43%.

Would you believe it? The Inkuku chair, by South African artist Ryan Frank, is a crinkly, colorful work of art, not least because it is made entirely out of recyclable plastic bags (the base is recycled aluminum).

I love this concept and look -- it actually reminds me of these bright, plastic "leis" we used to have when I was a kid.

Of course, sitting in a chair made from plastic bags isn't the only way to be environmentally responsible. For example, the Ergohuman line by Eurotech is not only the very height of ergonomic mesh design, it's also made from partially recycled or recyclable materials.

97% recyclable materials, wow! This is one chair that's makes your back feel good and your conscience.

This is why I wish I were in the market right now for something like this, but no, I must stay focused on my shopping goals for the season. I need interview clothes, pants... ah, oh well. I'm happy enough to just have gazed upon the cuteness of this top, with the sweet-heart bustline, the studded mesh, and the unusual melon color.

My girl Jae Dee is applying for a new job. She downloaded a job application from the company's website. It is in PDF format. She wanted to know how to type in the info instead of handwriting it. I was able to walk her through it via meebo instant messaging.

I used to do this kind of PDF manipulation a lot whilst I worked as a desktop publisher at Kinko's. I imported the PDF files into Adobe PageMaker and then was able to type information into the forms.

I didn't want her to go through the hassle of pirating Adobe software just to add some text to a PDF file. I knew of a better option. Inkscape to the rescue.

Inkscape is a free and open source cross platform vector graphics editor application (That's a mouthful). She first had to update Mac OS X to 10.5.5, update her X11 to 2.3.1, and then install Inkscape.

Once Inkscape was installed, she imported the PDF job application and used the text tool to type into the fields. When she was done, she saved it as a new PDF file and was able to print it out with all the info neatly filled out.

I think employers will be quite impressed with the typed in job application instead of the plain old handwritten ones like everyone else does. Happy job hunting Jae Dee!

---

- Alpha Mesh

Generally when searching PubMed I use both MeSH and textwords. If you already have some nice articles, either by performing a quick and dirty search or looking at the Related Articles or your colleague gave you one or two, then you can find the MeSH assigned to these papers by looking in citation format (see Fig). However going through a set of articles looking at all indexed terms takes quite some time and one doesn't easily get an overview of the overall frequency of MeSH in a set of records.

Therefore, Rachel Walden, asked first at Twitter and then at David Rothman' site (see here):

"What I’d like to do is to be able to enter the PMIDs of several citations and have the tool search MEDLINE via PubMed for the assigned MeSH terms, and return a single list of the terms used by any of the entered citations with a measurement of frequency. For example, if I input PMIDs 16234728, 15674923, and 17443536, the tool would return results telling me that 100% or 3 of 3 use the term “Catheters, Indwelling”, 2 of 3 use “Time Factors,” 1 of the 3 uses “Urination Disorders,” and so on. Although this example uses 3 PMIDs, I’d like to be able to input at least 10, just based on personal experience."
(PMID is the unique PubMed-identifier, by searching for the PMID you get one specific record.)

The suggestions made by several people were summarized by David in another post (see here). The following 3rd-party PubMed/MEDLINE tools seemed most promising:

• GoPubMed
• http://www.docmobi.com/mesh/ (adapted from GoPubMed by another David)

Both give useful results. The layout- is very user-friendly.

I tried my own sets of 20 PMIDs (from a systematic review search on "predictive models for in vitro fertilization") and www.docmobi gave this result:

This was the result when I selected: "primary terms only". If I selected "include secondary terms" I would find female and pregnancy as well, but at rates of 175%. First I didn't understand, but than I realized that pregnancy occurs as "Pregnancy" and as "Pregnancy Rate", whereas female occurs as "Female" and as "Infertility, Female". Therefore Pregnancy and Female can occur more than once as single words in one record (thus accounting for >100%). It is odd however, that important MeSH like Pregnancy and Female (which are really check tags, MeSH that should be assigned to each article that is about pregnancy or females) are not included in the primary list.

Although useful and nicely presented I still not find this ideal:

• Check tags are not in the list (with "primary terms only")
• Publication types and substance names are in neither list.
• Subheadings are not included. For words not captured by a single MeSH, but by a combination of MeSH and subheadings this is especially important.
  For instance, there is no MeSH for EGFR-inhibitors, you have to use:
  Receptor, Epidermal Growth Factor/antagonists & inhibitors
• Textwords are not included (not on Rachel's wish list but on mine)
• Personally I find the list so simple that I would have find the terms immediately myself.

Coincidentally I found another 3rd party tool which does the job much better (I think): (PubMed) PubReminer, produced by Jan Koster at our hospital (AMC, Amsterdam). I looked at it, because my colleagues and I are going to discuss it today.

This is the procedure I would recommend to find assigned MeSH and more, starting from PubMed (which is not absolutely required, because you can also search directly in PubReMiner)

• Collect the PMID's of the papers you want to analyze.
• If you have selected the papers in PubMed (on the Clipboard, in My collections or in your search set) then Set the Display Tab on: UI List (Unique identifiers), and export these PMID to a textfile by choosing "to Text" from the Send to button. You get a simple list of PMID's that you can copy/paste to PubReMiner. (not required, but handy)

• Go to PubReminer, paste the PMID's in the search box as one string.
• Click: "Start PubReminer" (if you enter a search you may wish to apply limits)

• You see the results, in the following columns: Year, Author, Journal, (Text)Word, MeSH, Substance, Country.

• Afterwards you can decide
  - Whether the words are searched in title only, in Title and Abstract or also in MeSH and RN.
  - which columns are displayed
  - whether similar words are merged or not.
• You can use selected terms to build up your search in PubReMiner and/or
• You can export the terms as a text-file (!)
• And, by the way, you can download a plugin for IE or Firefox (Fig. right)

This tool is not very intuitive, but the result is quite ideal.

You get both a list of MeSH plus their subheadings AND a list of textwords (and substance names).

There are very useful terms in here, for instance logistic models[mesh]. As textwords I should use 'logistic regression' or 'multivariate analysis'. It is only a pity that terms are given individually and spread: the context is lost ('analysis' may for instance be too broad, it is only useful in combination with 'multivariate' or 'regression').
With respect to the MeSH only individual terms are given. 'Pregnancy' is mentioned 19 out of 20 times in the MeSH-list. Does this mean I'm missing one paper by searching "Pregnancy"[MesH]? No, because that paper is indexed with the narrower term "Pregnancy Rate". (and you will find it by exploding Pregnancy).
So the context and the hierarchy are lost here as well.

But it is about as good as one can get.

I'm gonna use this tool (as an adjunct at least). Seems that it has some other potentials as well: look up genes, find the research interest of an author, determine the journal to submit your work to. Well I probably learn that in a few hours. Perhaps I will come back to it later.

I was talking to my Uncle Sergio at a family party a few weeks ago. He mentioned he bought a new camcorder but hasn't been able to transfer the footage shot with the camcorder to a DVD. I told him I'd make a house call to help him out, and I was able to finally set aside some time for him over the weekend.

He has a JVC Everio Digital Camcorder. It's a hard disk based camcorder. I connected the camcorder to his laptop via USB. From there, I was able to browse the folders. I came across some .mod files which were rather large, so I thought the video was most likely in those .mod files.

What the fuck is a .mod file? Turns out it's a regular old mpeg-2 video stream wrapped in JVC's silly non-standard container format. I copied the .mod files to his desktop and double clicked them. The default program that was associated with the .mod files was Nero, but the trial expired.

I downloaded and installed VLC because it usually plays almost anything I throw at it, however, it wasn't able to play the .mod file. I did a quick Google search and discovered that all you have to do is rename the .mod files to .mpg instead. I tried it, and VLC played them beautifully.

Now, I needed a simple way to put these videos on DVD. He still uses Windows, so DVD Flick came immediately to mind. DVD Flick is a great example of FOSS (Free and Open Source Software) that is way easier to use than its commercial alternatives. DVD Flick worked like a charm, and I was able to teach him how to put his videos on DVD.

Now, my Uncle Sergio is able to make DVD's from his baby shower and the birth of his first baby. More importantly, me and my girls got to spend some time with my few days old nephew.

Next time, I told him I'd show him how to upload his videos online, so he can just send links to his friends and family. I loathe optical discs. Online distribution FTW!

---

- Alpha Mesh

The 'What' category collates abstracts according to the concept hierarchies of GO and MeSH - providing a combined search across the fields of molecular biology and medicine.

GO describes gene and gene products in different organisms

MeSH categroy describes Anatomy, Biological Sciences, Chemical and Drugs, Diseases, Health Care, Natural Sciences, Organisms, Psychiatry and Psychology, Techniques and Equipment, Named Groups, Technology, Industry, Agriculture

The 'Who' category helps you identify journal article authors and leading scientists within specific biomedical areas. Allows user to find top authors for a query or specific authors. Complex disambiguation algorithm relates papers published, field of expertise, name and associated authors to reveal the 'most relevant' results. This approach leads to impressive accuracy and if at any point the system is not correct, it can be corrected by the users.

The 'Where' category provides information about geographic localization of people, research centres, universities, as well as journals in which found papers were published.

The 'When' category is the citations time machine.

I love this search engine. Iteration is simple, effective and dynamic. From the 3 million plus authors and the 15 million plus articles within PubMed this engine gives the most time-effective result return. To 'drill' deeper within the data-set is highly productive and the relevance of query return of a very high quality indeed.

Best Features

• Great visual features
• Relevance of results
• Simplicity of refining search results
• Guaranteed peer reviewed texts returned (PubMed)
• Combined GO and MeSH stratification system
• Simple and unobtrusive highlighting
• Much simpler than PubMed to create the linking feed

GoPubMed contains a vast array of powerful features to assist in defining the most accurate set of search results from the medical literature and is best explained in a video demonstration

Read more wonderful explanations of ontological and semantic search derivation as applied to medical science at GoPubMed.com. Another really interesting read is on AltSearchEngines.com - an interview with the GoPubMed founder Dr Michael Alvers from AltSearchEngine interview.

Other reviews from blogs and the literature can be found here

This was at 8:00 PM on Saturday, with my mom coming to watch him for a week starting at 6 AM the next day.

After much screaming and cursing, I decided to try and convince Peepers to get out of the kennel--with me standing a few feet away. I put him in the kennel and walked around the edge, calling him and wiggling my fingers and teasing the ground with a little stick so it looked like the dirt was writhing with delicious bugs.

Believe it or not, this worked Peepers into an absolute frenzy. He complained loudly and shadowed me from inside the kennel, but at first, he didn't seem to be able to get out. He kept poking his head into the mesh, which was definitely too small for the rest of his body to get through.

But then the moment of truth. I got frustrated and walked off, ready to give up. My husband walked up to the kennel as I walked away, made a peeping noise and waved at Peepers. Now, instead of looking down at the dirt and the pretend bugs and Mommy crouched on the ground, Peepers was looking up over the mesh at his Daddy.

The mesh only runs 4' off the ground. I had assumed (and we know what happens when we assume) that Peepers couldn't possibly manage to fly 4' up in the air AND squeeze through chain link, so we hadn't bothered to add another round of mesh to cover the rest of the kennel wall.

And THAT was the weakness. Peepers looked up into my husband's eye, crouched, spread his stubby baby wings, and shot straight up--grabbing the chain link just above the end of the mesh and, after a second of hesitation, squeezing his body through. He then proceeded to flop into my husband's outstretched hands and flutter gracelessly upward and onto my husband's shoulder, where he perched, peeped, and pecked at my hubby's eyeballs cheerily.

At 8:30 PM on Saturday night, facing a departure time early the next morning, we suddenly had to rush to Home Depot and purchase another roll of plastic mesh, and line the rest of the kennel with it. We did this in the dark, attacked by mosquitos, stressed by the upcoming trip, praying this was really the final answer.

Peepers reportedly did not escape at all last week while we were gone.

Dropbox is a service that allows a person to store files online, 2GB on a free account or 50GB for $10 a month, and can be accessed by any type of computer, Mac, WinPC, and Linux.  Interested, I decided to search for Live Mesh instead.  I signed up for a free account, 5GB of storage, and was accepted in, finally!  So far, I really like the service, and the product does seem promising.  Mac and Mobile devices are supposed to be supported in the near future also.  I will be updating my experience with Live Mesh the more I use it over time.

first, a description of implicit surface as i understand it.

2.2.3 Implicit surfaces (Bloomenthal 1987)

Implicit surfaces are also known as "Metaballs", "Blobbies" or "Soft objects".

Implicit surface is a technique first introduced by Jim Blinn in 1980. The idea is to have control objects, which determine the resulting surface. Each control object generates a sphere around itself. When two or more controller objects are close together, the resulting surface will “melt” together. So instead of two spheres one will have two spheres which are connected and form a “blobby” single surface shape. How much the resulting surfaces blob together is a result of distances from controlling objects and of weights of these control objects. (Maestri. 1999 43-44)

so i had few ideas on the matter. pls look at a picture and tell me what u think.

ok. now as far as i understand the poligonization of such mathematical substance :) as metaball, it works like this (and pls correct me if i am wrong) the algorithm "checks" certain points in worldspace to see if that point is in or outside of this mathematical descriptio0n of metaballsurface. so basically, user determines "resolution" or level of detail he or she wants, and based on that, algorithm generates planes, to see where are boundaroes of this object in that particular plane. and planes are generated in x, y, and z. so pls look at picture beneath. so what i thought of is, why user is not able to determine how these planes are distributed and aligned? why dont we have such simple control as in uv ordinates, u know we would choose box, cilinder, sphere just like in uv layout (imagine box uv layout as a traditional plane distribution for imlicitsurfaces).

so people who have read, and understood, some of papers about implicit surfaces, including old john blinns texts, tell me do i bulshit or that could be a very small step towards better topology?

and some links to read more: here

and as usual link to my other website here

dont like english? u can (try) readig it in lithuanian or anny other language here! alternative, has no lithuanian :(

]]> http://spreadthefield.wordpress.com/?p=21 Wed, 10 Sep 2008 21:30:22 +0000 qbmello http://spreadthefield.fr.wordpress.com/2008/09/10/even-more-zone-read/ You can't talk about the zone read offense enough when discussing the modern brand of offensive football. I think I provided a pretty good introduction to the concept in my earlier posts, but I would like to get a little bit more specific here, in particular, the way in which the play is actually executed.

First and foremost, this is a zone running play - a handoff to a running back who is running behind offensive lineman blocking zone principles. This mean the each offensive lineman steps in a direction (let's say right) and on an angle (let's say 45 degrees), then blocks whatever defender shows on that path. This creates a flow of both blockers and defenders to the right, allowing the running back to find where any crease develops between defenders. Generally, we say there are two kinds of zone runs - inside and outside zone. Inside zone (or "IZ") attacks the A gaps, while outside zone ("OZ") attacks the C to D gaps (but again, that is really just the running back's direction, the play is rarely run to a particular whole - instead the running back runs whatever hole develops in reaction to the defenders).

Now I want to talk about the mesh. For the purposes of this post, let's just assume we're running IZ to the right, with a read. This means our offensive linemen are all stepping at an angle to their right, blocking whatever shows in their path, and that we are leaving the backside defensive end (our left) unblocked. We are in a shotgun formation, with the QB five yards behind the center and the back about six yard deeps, splitting the outside leg of the left guard. On the snap, the QB catches the ball and pivots his feet so that his body is square to the read key (the name for the backside defensive end) and extends the ball straight in front of him. The RB takes one step with his right foot aiming at the right tackle then comes downhill, aiming for a point somewhere on the center (this varies from team to team). The RB goes very slowly here, to allow time for the read - on IZ or OZ read, RB's are always taught "slow to the hole, fast through the hole." The RB on his first steps makes a wide pocket for the ball and bites over it - unlike conventional running plays, it is the RB's job to get over the ball, not the QB's to get it in his stomach. As the RB begins to bite over the ball, the Qb begins to make his decision - If he needs more time, he can lean with the RB to prolong the "mesh period" (time when both the QB and RB appear to have the ball) - this is called "riding" the back. When the QB has made his decision, he simply lets it go in the back's stomach, or with two hands removes it and gets out as quickly as possible.

Estou escrevendo este artigo do meu notebook de trabalho. Verifiquei que o sinal da rede sem fio da orla de Copacabana estava presente, fraquinho. Desconectei o cabo de rede do sistema do hotel e fui pra janela, onde o sinal passava de "muito baixo" para "baixo". Tcham! Funciona! E mereceu este artigo, devidamente publicado através dela.

Povo do Rio e viajantes na região de Copacabana, aproveitem. Internet gratuita e de qualidade neste maravilhoso cartão postal do Brasil. Dizem que será limitado daqui um tempo, mesmo assim, é uma excelente iniciativa.

Daqui onde estou o sinal varia um pouco, mas sei que lá na beira da praia mesmo ele é mais forte e não cai tanto.

Para aqueles que pensam que esta rede privilegiará apenas os abastados proprietários de notebooks e os moradores da região, existem várias idéias com este projeto que tem caráter educacional e permitirá, por exemplo, que médicos monitorem portadores de cardiopatias por aparelhos digitais que utilizarão essa rede para enviar dados em tempo real.

O conceito da rede é o Mesh e existem idéias de expandir por toda a região metropolitana do Rio. Já existem câmeras de monitoramento de segurança nos postos da polícia militar do local aproveitando o mesmo conceito numa rede semelhante, porém separada, com o nome de Rede Orla Vídeo. Enfim, a idéia deve servir pra muita coisa em pouco tempo. Em outras cidades e países o uso prático de redes sem fio públicas para fins além do simples acesso à Internet já é uma realidade.

First:

#1. Create 4 lines using the rectangle tool

#2 Add color, reference Kuler for some killer swatch options. I used "Greenpeace Greenlife"

#3 Make a Mesh: select all lines and click Object> envelope. I used 4 columns and 2 rows. Pull and twist the anchor points with the Direct Selection Tool (A).

#4 Overlay Color Effect: I duplicated the layer with the mesh on top of my original mesh (ctrl+f, for a direct paste on top). Click the layer target circle icon in the Layers palette and change the layer mode to Overlay in the Transparency palette. Move the overlay layer until you reach desired effect.

#5 Play around with different effects. I used the warp option and added text by drawing a line with the pen tool and selected the Type on a Path tool to create curved text.

To see more detailed instructions, visit Veerle and all of her tutorials.

-michelle

Topologie Mesh

[caption id="" align="alignright" width="180" caption="image montrant la topologie d'un réseau mesh"][/caption]

La topologie mesh (terme anglais signifiant maille ou filet), est une topologie de réseau qualifiant les réseaux (filaires ou non) dont tous les hôtes sont connectés de proche en proche sans hiérarchie centrale, formant ainsi une structure en forme de filet. Cela permet d’éviter d’avoir des points sensibles, qui en cas de panne, coupent la connexion d’une partie du réseau. Si un hôte est hors service, ses voisins passeront par une autre route.

Cette architecture est issue de la recherche militaire et a été utilisée par les armées notamment Américaine et Française.

C’est une technologie de rupture comparée aux solutions centralisées classiques sans-fil avec station de base. Les solutions « Mesh » autorisent un déploiement rapide et simplifié, une grande évolutivité de la couverture et, de par leur maillage, une forte tolérance aux pannes et aux interférences, réduisant significativement les coûts d’installation et d’exploitation des réseaux. Ces solutions reproduisent l'architecture de l'Internet tout en l'optimisant pour le sans-fil.

L’implémentation d’une telle topologie est appelée réseau maillé.

C'est la solution qu'ont adopté l'équipe de conception du OLPC (One Laptop per Child).

Du wiki du projet (wiki.olpc.org) :

Mesh Networking

[caption id="" align="alignleft" width="180" caption="One Laptop per Child XO"][/caption]

The specifications for the wireless networking interface include:

• Ability to act as a mesh point when laptop's main CPU is off;
• Support for asymmetric links/paths;
• Incremental releases—mesh networking is available immediately on XO; Upgrades will continue to improve functionality and adherence with standards;
• Simultaneously acts as a mesh point and an infrastructure node.
• Standards Compliance: follow 802.11s draft when possible.