Monthly Archives: September 2014

Happy Birthday, Hell Gate Bridge!

By Johna Till Johnson
Photos by Vladimir Brezina and Johna Till Johnson

Barge Approaching Hell Gate Bridge

Barge approaching Hell Gate Bridge

It’s hard to believe the Hell Gate Bridge is almost 100 years old.

98, to be exact: The bridge first opened on September 30, 1916. I’ve written about my love for the Hell Gate three years ago, in my birthday greetings to the Bayonne Bridge.

But it’s worth summarizing again why I feel so strongly about the Hell Gate. As I wrote then:

I love bridges. I’m not entirely sure why. Partly it’s the look of them: They seem almost alive, taking off in a leap of concrete, stone, or steel,  somehow infinitely optimistic and everlastingly hopeful. Partly it’s their function: Bringing things together, connecting people and places that were previously divided. And of course, bridges often cross moving water—another of my favorite things.

But though I love them all, some bridges in particular hold a special place in my heart.

Many years ago I worked north of New York City (in Connecticut and later in White Plains). The hours were grueling—some days I’d leave my apartment at 5 AM and not return until 11 PM. Sometimes I drove, but I preferred to take the Metro-North train. I relished the peacefulness of the scenery rolling by.

As we crossed the Harlem River, I’d catch sight of one bridge in particular, a study in contrasts: graceful, soaring, yet solid, composed of two steel arches with slightly different curvatures, so they were closer together at the top of the arch and wider apart at the bases, anchored in solid stone towers.

The rising sun would touch this bridge and (so I thought) paint it a lovely shade of rosy pink.  The memory of that beauty was often the nicest part of my day.

Hell Gate Bridge, seen from our window

Hell Gate Bridge at sunrise, seen from our window

But for years, I didn’t know what the bridge was called, or even where, exactly, it was. All I knew was that the sight of it reliably brightened my mornings.

One day I happened to mention the bridge to my father, a retired naval officer who had once been stationed in New York City, but now lived hundreds of miles away.

He recognized it immediately from my description: “That’s Hell Gate Bridge,” he said. An odd name for a structure of such harmonious beauty! I hadn’t heard of Hell Gate before, and my dad explained it was where the Harlem River joined the East River. Hell Gate was a treacherous body of water characterized by converging currents and occasional whirlpools that had been the doom of hundreds of ships over the past several centuries.

“As a young ensign, I was on a ship that went through Hell Gate,” my father said. “But I don’t recall that the bridge was pink.” That would have been in the late 1940s; I can’t recall for certain what kind of ship he told me it was, but my memory insists it was a destroyer.

Many years later, I’ll not forget the thrill I had the first time I passed under the bridge, in a far different vessel: My trusty yellow kayak, Photon.

We paddle under the Hell Gate Bridge

We paddle under the Hell Gate Bridge (photo by Johna)

As for the bridge’s color, I later learned my dad was right. The bridge was painted “pink” (actually a color called Hell Gate Red) only in 1996—but the paint has faded to a pastel rose, as you can see.

When doing further research, I learned that:

  • The Hell Gate and Bayonne Bridges reflect the vision of the same man, Czech-Austrian civil engineer Gustav Lindenthal. (Lindenthal designed the Hell Gate, and his Swiss co-worker and protege Othmar Ammann designed Bayonne.)
  • Their beauty is no accident. According to Wikipedia, “Lindenthal’s work was greatly affected by his pursuit for perfection and his love of art. His structures not only serve the purpose they were designed for, but are aesthetically pleasing to the public eye.” Indeed!
  • There’s a third sister (or perhaps cousin): The world-famous Sydney Harbour Bridge. Although designed by a different firm, the Sydney Harbour Bridge was inspired by Hell Gate and Bayonne.

I also learned that the Hell Gate Bridge was so perfectly engineered that when the main span was lifted into place, the adjustment required was a mere half-inch!

Happy birthday, you beautiful creature. You haven’t aged a bit!

Travel Theme: Inviting

By Vladimir Brezina

Landed on Sandy HookPaddling out from Manhattan for the day, we often find ourselves heading south to Sandy Hook, NJ. Our favorite spot to land there, about half-way down the bay side, is a picturesque little “island” of wooded high ground that rather improbably rises above the otherwise flat Sandy Hook View over the salt marshlandscape. (Indeed, it is man-made, being the overgrown concrete ruins of an early 20th-century military installation, Battery Arrowsmith.) Separating the “island” from the “mainland” of Sandy Hook is a salt marsh.

Whenever we land at the “island”, we always take a few minutes to walk round to the back, to the edge of the salt marsh.  We go there to observe a mass display of invitation.

The marsh is fringed by a zone of bare, or sometimes sparsely overgrown, ground. Looking down closely, we see that the ground is studded with holes, large and small.

Field of holes

At first, standing there, we see nothing remarkable.

But within a minute or two, we glimpse, here and there, a furtive movement. Then more and more, and soon there is movement all around—movement of a curiously stereotyped sort.

Each hole is occupied by a fiddler crab.

Two fiddler crabs
Fiddler crab emerging

There are both male and female crabs. They are easy to distinguish—the males have one greatly enlarged claw. And they use this claw in a characteristic courtship display. They stand next to their holes and repeatedly raise their large claws, inviting the females to enter.

It is quite a sight to see the whole area come alive with hundreds of crabs all raising their claws simultaneously in their inviting gesture…

(A contribution to Ailsa’s travel-themed photo challenge, Inviting.)

Weekly Photo Challenge: Nighttime

By Vladimir Brezina

We love to kayak around NYC at night!

(For one thing, we paddle faster at night…)

Night falls as we paddle down the East River
Manhattan shines forth
George Washington Bridge nocturne
Midtown Manhattan illuminations
Paddling down the East River at 3 AM

A contribution to this week’s Photo Challenge, Nighttime.

Mom, We Did It!

By Johna Till Johnson

Occasionally a news story really resonates with me. This is one: An Indian spacecraft called Mars Orbiter Mission (MOM) has just reached orbit around the planet Mars.

And the achievement is astonishing on many fronts: It’s the first time in history that any country’s spacecraft has made it on the first attempt. At $74 million, the effort cost less than making the movie “Gravity”—and almost 10 times less than the US’s NASA Mars mission.

Scientists and engineers cheer as MOM reaches Mars orbit (Photo: Reuters)

Scientists and engineers cheer as MOM reaches Mars orbit (Photo: Reuters)

And, as with the NASA effort, some of the top scientists and engineers involved are women. There’s something symbolic in “Mother India”—which is linguistically, culturally, and even genetically the ancestor of many of us of European descent—sending a spacecraft called MOM to Mars.

I’m really proud of our Indian sisters and brothers for pulling this off. And I’m psyched to see so many saris involved in the celebration.

MOM, we did it!

Happy Fall!

By Vladimir Brezina

Wild flowers along the riverbank (photo by Johna)The Fall Equinox occurs this evening. So, although we very much regret, especially this year, Summer’s passing—Happy Fall, everyone! (Well, everyone in the northern hemisphere… for the others, Happy Spring!)

Fall colors by kayak

Travel Theme: Strong

By Vladimir Brezina

You don’t need a lot of strength to travel long distances by kayak. You just need a lot of endurance.

But you do need need to be strong at a few critical moments.

Such as when taking apart your stuck two-piece paddle after the trip—

Strength needed

A contribution to Ailsa’s travel-themed photo challenge, Strong.

Weekly Photo Challenge: Endurance, Take Two

By Vladimir Brezina

The only way to build up endurance is to endure…

Icy day at the Reservoir
Endurance 1
Endurance 2
Endurance 3

In response to this week’s Photo Challenge, Endurance. The first response was here.

Weekly Photo Challenge: Endurance

By Vladimir Brezina

This week’s Photo Challenge is Endurance.

Long-distance kayaking is all about endurance. We can paddle past sunset

Past sunset

into the night

Into the night

and when the next day dawns

Dawn

we are still there, paddling.

Still paddling

We can paddle forever.

But we can’t stay awake forever. Sooner or later, that nap on the beach becomes impossible to resist…

Nap on the beach

From the 2014 Everglades Challenge. Story and more photos are here.

Another response to Endurance is here.

Two MacArthur Geniuses

By Johna Till Johnson

I don’t normally pay a lot of attention to the MacArthur Genius awards. The name alone annoys me, because it’s simultaneously elitist and undefined.  What makes artist X a “genius” while her peers are merely “talented”? And how can we be sure that out of all the talented people in the universe, the committee has miraculously selected the 12, or 20, that are talented enough to be considered geniuses?

But I do like the notion of awarding creative people a big chunk of change—this year, it was $625,000 over a period of five years—with no constraints. And I also think it’s cool that the awards are so broad-ranging. They go to poets, activists, artists, musicians… and even the occasional scientist, mathematician, or engineer.

Which brings me to this year’s awards. I was overjoyed to see the award given to two people in particular.  One was Craig Gentry, a cryptography researcher at IBM’s T. J. Watson research center, who’s done groundbreaking work in the area of homomorphic encryption.

Craig Gentry

Craig Gentry

Homomorphic encryption is, in some respects, the holy grail of encryption, because it enables machines to process encrypted data without ever decrypting it. That doesn’t sound like much, but consider: Today, if your email is stored on Google’s servers, it’s fully accessible to Google (which has been known to turn it over to the NSA).

It’s fully accessible because you need Google to do useful things for you (like sort the mail into folders). With homomorphic encryption, you could keep your mail entirely encrypted without giving up any of the functionality (such as folder-sorting). But Google would have no idea what you named your folders, or what was in your email—and the NSA couldn’t read it, either.

Now imagine that instead of ordinary email, we’re talking about medical or financial records—and you can see the benefit.

The issue at the moment is that the computational horsepower required to make homomorphic encryption is immense, so only starting to become practical in real-world applications. But Craig was among the first to show it was theoretically possible. And he did it incredibly elegantly, using a Zeno’s-paradox-like approach that started with “somewhat homomorphic” encryption that iteratively refined itself to become “fully homomorphic”.

And there’s one other thing I like about Craig: He writes really, really well. His Stanford University PhD thesis, which you can find here, is a joy to read. I don’t mind ploughing through dense scientific papers—but I really appreciate it when someone writes gracefully and well.

Yitang Zhang

Yitang Zhang

Another one of this year’s “geniuses” is Yitang Zhang, who is a number theorist at the University of New Hampshire in Durham. Yitang (who I’ve read goes by “Tom”) recently proved the “bounded gaps” conjecture about prime numbers.

Slate’s Jordan Ellenberg (who’s a mathematics professor at the University of Wisconsin) does a much better job explaining what this is and why it matters than I could do. I urge you to read his writeup here.

Suffice it to say that Tom cracked a really, really hard problem in one of the most demanding areas of mathematics. And he’s apparently a really nice, funny, down-to-earth guy, as described in this University of New Hampshire Magazine article.

But that’s not all: Tom is 57—and has done much of his most creative work in the past 10 years (ie from his late 40s onwards).

Mathematics is a field as notorious as gymnastics or ballet for having a youthful peak–the joke among mathematicians is that anyone over 30 is washed up. Gauss, one of the most famous mathematicians ever, did his most significant work by the age of 22—a fact pointed out by my overly gleeful number theory professor when I was 21 or so.

So it’s great to see someone not only doing great things, but doing them at the relatively “advanced” age of 57.

I’m sure the other 19 MacArthur Fellows have done equally great work in their fields. But seeing the awards go to these two made me happy—and I wanted to share my joy with you!

Rear Window

By Vladimir Brezina

Like James Stewart in Rear Window, I’ve been trapped at home for some days by an inconvenient but (hopefully) temporary ailment. And there is the rear window, and I, too, have my camera! But whereas peering into two or three neighbors’ windows might have its fascination, it pales when the windows number in the thousands

But looking out at the river never pales.

Day 1, sunrise

Day 1, sunrise 1
Day 1, sunrise 2

Day 2, sunrise

Day 2, sunrise

Day 3, sunset

Day 3, sunset 1
Day 3, sunset 2
Day 3, sunset 3