3-Dimensional Printing

I've been hearing and reading about a topic that brings me smack-dab into the reason I started this blog.  I love to learn about new things, to mull over ideas, new and old.  Anything that stretches and challenges the mind.

We are by now accustomed to seeing 3D images, even though they really aren't 3D.  They may look as though they have depth, but that's just an illusion.  No matter how real they look, they are still just 3-dimensional representations on a 2-dimensional medium.

Here is a 3D picture of the St. Louis Arch.  It's really two slightly offset 2-dimensional images.  The picture looks pretty weird unless you put on the special pair of glasses to merge the images so that your brain interprets it as one image with the illusion of depth.









Photographs, no matter how well they capture a beautiful nature scene, are always flat on the page.  And a printer--at least the ones most of us have ever encountered--can only put ink down on a flat piece of paper.

That, however, is no longer true.  We now have 3-D printers.  Maybe you already knew that, but it seems that I am just waking up to that fact, even though my research tells me that they have been around for a couple of decades.  At first, of course, they were very expensive and limited in their use--mostly for prototype models in manufacturing applications.  Now, however, we probably have many products in our daily lives that are made directly from printers.  These are only a couple of the thousands of such items.

Cell phone case

Toy car

A computerized model with all dimensions (length, width, depth) is sent to the printer, which deposits ultra-thin layers of powder onto a surface, one on top of another, until the final product is made.  The powder is held together using a binding liquid that's deposited during printing.

And such items as these are only the tip of the iceberg.  What is really mind-boggling is the way 3D printing is becoming indispensable in the medical field. 

Applications in dentistry are becoming more widespread.  Crowns, bridges, and implants can now be made from a 3D printer right in the dentist's office.  No more living with a temporary crown--it can be scanned, manufactured, and put in your mouth all in the same visit!

The most amazing related medical story I have come across was done in June, 2011, in the Netherlands.
An 83-year-old woman had such a terrible infection in her lower jaw (mandible) that it had to be surgically removed.  Her age precluded the trauma of complex reconstructive surgery that would give her a new mandible, so the doctors decided to try something new: a 3D printed implant.

The project required a team of researchers and designers, as well as a company to handle the production.  But the actual printing took only a few hours.  A laser beam melted thin layers of titanium powder, one on top of the other.  Thousands of layers were necessary to build the jawbone (33 layers = l mm of height).  The printed jaw then got a bioceramic coating and was attached to the woman in about four hours.  She was talking and swallowing within a day.

This all sounds pretty amazing to me!

Next Post to Come:  FOOD PRINTING

It's All In How You Look At It

Nothing says Spring better than the fresh, vibrant color of tiny new leaves.  The ivy plant hanging in our atrium is proudly giving birth to new growth in response to longer days and more sunshine.

 

Looking for a few pertinent words about spring, I turned to Bartlett's Familiar Quotations and was surprised to find how many expressed a view different from the expected.  To be sure, I found a few of the usual "tiptoeing through the tulips" sentiments:

      In the spring a young man's fancy lightly turns to thoughts of love. 

                                                                      Alfred, Lord Tennyson

 and

      Spring, with that nameless pathos in the air

      Which dwells with all things fair.              Henry Timrod

First let me send condolences to those of you who live in a galaxy far, far away from California and its spring, a season which begins here as early as February and is galloping merrily along by now.  Of course, spring is, by its nature, quite fickle--no matter where you are.  In fact, though the past month was so warm and sunny that most green growing things got all revved up, we just had a week of sorely-needed cold rain here in the Sacramento Valley and lots of snow in the Sierras.  "Spring" seems to be an apt terms--lots of ups and downs! 

First leaf buds on a Black Oak

Henry Van Dyke took note of this fact in his book, Fisherman's Luck: 

The first day of spring is one thing, and the first spring day is another.

 

Stephen Vincent Benet must have been having a bad day in the big city when he wrote:

     Now grimy April comes again, .....

And Samuel Butler likewise:

     To me it seems that youth is like spring, an over-praised season .....

 

Leaflets on a willow

But I like spring, and so I resonate more with John Milton: 

In those vernal seasons of the year, when the air is calm and pleasant, it were an injury and sullenness against Nature not to go out and see her riches, and partake in her rejoicing with heaven and earth.

                                                                              

Leaflets and blossoms on a Japanese maple

And, if we really want to get into the "springy" spirit, why not let it all hang out, romping and bouncing along as John Logan sings "To the Cuckoo" :

     Oh could I fly, I'd fly with thee!
     We'd make with joyful wing
     Our annual visit o'er the globe,
     Companions of the spring.

                  
                      
                   After all, in the words of humorist Donald R.P. Marquis:
                                     Oh, what the hell, it's Spring!

    

                                                                        

Mary Oliver - A Question

Just a short post today -- something I came across while researching poet Mary Oliver.
Her book of essays, Long Life, was published in 2005.  In the Foreword she wrote:

"...the big question, the one the world throws at you every morning.  'Here you are, alive.  Would you like to make a
 comment?' " 

Cat Lovers Know the Answer

The fog comes
on little cat feet.

It sits looking
over harbor and city
on silent haunches
and then moves on. 

Most of us have read and enjoyed the imagery of this little poem, written by Carl Sandburg and first published in 1913.

------------------------------------------------------------------------------

But I just came across some lines by another Midwesterner, contemporary poet Judith Minty.

All winter, those cats of mine

doze like old women in front of the fire,

curl their fur around saucers of sunlight

they have trapped on my rug.  Sometimes

they bury themselves in the wool of blankets
to sniff dreams I left there.

 (I just love that last line!)

Awake, their eyes reflect deeper sleeps.
Delicate tongues yawn, hide needles of teeth.
I listen for their soft paws,
for their purrs to rattle in slow circles
near my bed.  They want to capture
warmth from my body.  "Why do you
keep those cats?" my neighbors ask....


(This is only part of the poem.  The original appeared in her book Lake Songs and Other Fears, 1974).

"Why keep us?  Who needs to ask?"

One Dusty Old Thing Leads to Another

Isn't it amazing how one seemingly random choice can lead to a whole chain of fortuitous circumstance!  On a whim you pick up a certain book and you find that a whole new part of the world opens up to you.

A book of essays that had been hanging around on my shelves for several years (probably bought from a bookstore's bargain table) found its way into my hands a year ago.  Thumbing through a number of the essays for something to grab my attention, I came across a short piece by one Mary Oliver, a name then completely unfamiliar to me. "Dust" was the essay title, and it was short--so I could chance reading it with little time investment.


Short in words, yes--but large in thought.  Ever since that first reading I have found it impossible to let go of what it said on its first page.

She talks about "M." (unnamed in the essay, but who is identifiable when you read about Mary Oliver's life), who would keep everything, even empty envelopes for their handwritten addresses and postmarks.

     Of course she would rather there be something inside--a letter! or, oh lovely 
     chance, a photograph!

M. dreams of all the old and forgotten stories, dispersed to the wind, to the ages...
She thinks of the people who left all these things--books, hats, pieces of lace.

      And photographs, the unnameable faces gazing out, everything to say and 
      no way, no way ever again, to be heard.

That last line evokes such a feeling of nostalgia, of a universal link to what it means to be human.  All of us want, need, to make connections to others.  And we all hope that something of ourselves is left as a legacy to those who come after.

If I were an avid reader of poetry I would have recognized Mary Oliver as one of our most prolific and appreciated contemporary poets.  No wonder the lines above, though part of an essay, have such poetic resonance.  I researched  her poetry and found many examples of moving, insightful writing.


One of her best-known poems is "Wild Geese," in which she talks about love and despair, the tension in trying to discern our right path.  She finds reassurance in the natural world order--the sun, the rain, the mountains, and the wild geese.


      Whoever you are, no matter how lonely,
     the world offers itself to your imagination,
     calls to you like the wild geese, harsh and exciting,
     over and over announcing your place
     in the family of things.
 Read this whole poem and many more

One of her more recent books of poetry is Thirst (2006), in which she works her way through grief after the death of Molly Malone Cook, her beloved partner for over forty years.  Her poem, "Heavy," expresses the advice of a friend:

     It's not the weight you carry
     but how you carry it--
     books, bricks, grief--
     it's all in the way 
     you embrace it, balance it, carry it
     when you cannot, and would not,
     put it down. 
About Mary Oliver
 I don't want to go on too long with this post, even though there are many more of her poems that I could cite.  Maybe at some future time, I'll do that.

Who is one of your favorite authors?  or favorite books?  Post a comment here and share with all the readers of Miiind Wide Open.
  

Cutting for Blossom

Intrigued by its bright succulent leaves and delicate flowers, I bought a Kalanchoe plant several months ago and placed it indoors. 

After several months the blossoms dried up.  I didn't want to throw away the plant but, not sure how best to prune it, I just picked off the spent blossoms.


Obviously, this wasn't going to work.

Now I'm getting serious.
The old stems have to be sacrificed.

 

This is more like it.
Look at all that beautiful fresh growth
underneath!

 OK--I won't belabor the point here.
We all know that sometimes it takes pain to bring about a new and improved version.
Gone is all the dead stuff -- as well as that gaudy, shiny paper.

But I'll dress it up in a new and pretty pot, give it lots of loving care--and hope for the best! 
Stay tuned.

Who Are the Turkeys in Your Neighborhood?

"Hmm--this looks like a good neighborhood."

"Nice green grass.  Makes the bugs grow fat and tasty."

"Now, remember-- We say that we happen to be in the neighborhood doing some exterminator work, and we can make them a special deal.  Today only!"

"How were we supposed to read the 'No Solicitors' sign?"

Well, it's not always going to be serious here.  Sometimes you just gotta have fun!

These gals were walking down the street yesterday as though they own the neighborhood--and maybe they do.  We have quite a few wild turkeys around.  This is a regular suburban neighborhood--houses with front lawns and backyards--but there are a couple of nearby parks, with creeks connecting us.  The turkeys come around whenever they feel like it--and sometimes stop traffic when they are trying to cross a busy street.

Looking at Both Sides

Bows and flows of angel hair
    and ice cream castles in the air
...I've looked at clouds that way.
But now they only block the sun;
   they rain and snow on everyone
...clouds got in my way.


  
How many times have I heard that song? and sung along to the few words I remembered?  Nice song, right?  Catchy tune, enjoyable rhyme--moons and Junes, tears and fears, dreams and schemes.  But, for some reason, while hearing Judy Collins sing it on my car radio recently, I really listened with my Mind Wide Open, catching all the words and their meaning.

Joni Mitchell wrote the song while observing clouds on an airplane flight.  It appeared on her album, "Clouds," in 1969, but Judy Collins made the first commercial recording, winning a Grammy for Best Folk Performance in 1968.

So it has been around for quite awhile.  And it's never too late to listen with mind fully engaged.

Every verse draws a contrast between the loveliness of puffy white clouds in a blue sky that makes us feel happy, proud, dizzy with love--and the underside of clouds as they rain on our parades and cast shadows of self-doubt.  We are left with the parting thought that looking at clouds (life) from both sides leaves us with a sense of disillusion.  I really don't know life at all.

I don't buy into a sense of pessimism.  I think that life and love are made up of both sides--euphoric and  disheartening--and all gradations in between.  It's in the acceptance of both these extremes as part of being human, seeing them clearly, and balancing them within the framework of my psyche--that life becomes either challenging and rewarding or just an ordeal to get through.  So we welcome the roller coaster ride of both sides, knowing that something's gained in living every day.  And isn't it wonderful when that thought is communicated through great music?

Youtube -- Judy Collins singing "Both Sides Now"