FDR speaks to us from 1936, and it still applies

Posted on Saturday, June 12, 2010 by nosleepingdog

President Franklin Delano Roosevelt reflects on the “enemies of peace” with which he struggled in his first term:

“We had to struggle with the old enemies of peace—business and financial monopoly, speculation, reckless banking, class antagonism, sectionalism, war profiteering.

 ”They had begun to consider the Government of the United States as a mere appendage to their own affairs. We know now that Government by organized money is just as dangerous as Government by organized mob.”

Speech at Madison Square Garden (October 31, 1936)

Franklin_Delano_Roosevelt,1941.jpg

Roosevelt in 1941, signing the Lend Lease Act. Photo source.
 

If Babbage HAD built his “Difference Engine”

Posted on Monday, October 12, 2009 by nosleepingdog

Here’s a funny comics-version, from 2D goggles. Actually it is about mathematician Ada Byron Lovelace (1815 – 1852), but we all know that women never get top billing!

The comic was made for “Ada Lovelace Day”, to promote a film (to be offered to local stations by PBS) about this remarkable woman, and the film-makers need our help:

letters of support from people who have been influenced in some way by Ada and who are willing to help publicise the film, be a part of the interactive website, perhaps show the film, or contribute in any other way.

Rosemarie says, “I need letters from people stating how important a film like Ada is and how they through their networks can help to publicize the film. It would be great if the women have organizations they work or belong to. If they are software developers or computer experts, this would be great. It would be best if they were Americans, as the NSF (National Science Foundation) is American.”

If you’re not American, letters would still be useful of course! The deadline is the end of October.

Please write to:

Rosemarie Reed
On the Road Productions International, Inc.
310 Greenwich Street, 21F
New York, NY 10013
Or email Rosemarie directly, rreed40148@aol.com.

After some thought, I decided to write a letter based on my experiences giving books to kids at the food pantry, and the unabated gender gap I see in kids’ interest in science and math. Sure, the older kids are computer users, but computers are fun personal devices; they still display an aversion to math and science, especially the non-biological sciences. A few boys get drawn in by technology, but I don’t see it in girls. [I have a small sample size, I admit, and it is a rural area.]

Who was Ada Lovelace?

Ada Byron Lovelace was the daughter of Lord Byron (his only legitimate child); she married a nobleman, and was part of the social whirl of that class, dancing and entertaining. [Photo below from Wikipedia]

Wikipedia tells us that

During a nine-month period in 1842-43, Lovelace translated Italian mathematician Luigi Menabrea’s memoir on Babbage’s newest proposed machine, the Analytical Engine. With the article, she appended a set of notes. The notes are longer than the memoir itself and include (Section G), in complete detail, a method for calculating a sequence of Bernoulli numbers with the Engine, which would have run correctly had the Analytical Engine ever been built. Based on this work, Lovelace is now widely credited with being the first computer programmer and her method is recognised as the world’s first computer program.
However, biographers debate the extent of her original contributions. Dorothy Stein, author of Ada: A Life and a Legacy, contends that the programs were mostly written by Babbage himself. Babbage wrote the following on the subject, in his Passages from the Life of a Philosopher (1846):

I then suggested that she add some notes to Menabrea’s memoir, an idea which was immediately adopted. We discussed together the various illustrations that might be introduced: I suggested several but the selection was entirely her own. So also was the algebraic working out of the different problems, except, indeed, that relating to the numbers of Bernoulli, which I had offered to do to save Lady Lovelace the trouble. This she sent back to me for an amendment, having detected a grave mistake which I had made in the process.

The level of impact of Lovelace on Babbage’s engines is difficult to resolve due to Babbage’s tendency not to acknowledge (either orally or in writing) the influence of other people in his work. However, Lovelace was certainly one of the few people who fully understood Babbage’s ideas and created a program for the Analytical Engine, indeed there are numerous clues that she might also have suggested the usage of punched cards for Babbage’s second machine since her notes in Menabrea’s memoir suggest she deeply understood the Jaquard’s Loom as well as the Analytical Engine. Her prose also acknowledged some possibilities of the machine which Babbage never published, such as speculation that “the engine might compose elaborate and scientific pieces of music of any degree of complexity or extent”.

The Difference Engine becomes reality after 150 years

Babbage never built his mechanical computer, but the London Science Museum did make a working version. It was finished in 1991 for the 200th anniversary of Babbage’s birth.

A view of “some of the number wheels and the sector gears between columns”

AdaLovelaceLondonScienceMuseumsReplicaDifferenceEngine.jpg

Difference Engine model photos source.

Ada Lovelace, “The Right Honourable the Countess of Lovelace”, gave birth to three children (the firstborn was named Byron), and died at 37 of uterine cancer and being bled by her doctors.

Let’s support that film, with letters or emails to demonstrate demand for stations to show it! Here’s the email again, rreed40148@aol.com.

More about girls being turned off to math and science

Feminist Chemists cites a 2008 study by the American Mathematical Society:

In elementary school, girls do as well as or better in math than boys. In middle school, girls with an inclination for math begin to lose interest and fall behind, mostly due to peer pressure and societal expectations. Throughout middle and high school, social stigma and lack of appropriately challenging educational opportunities for the mathematically precocious becomes a hard reality in most American schools. Consequently, gifted girls, even more so than boys, often camouflage their mathematical talent to fit in well with their peers.

A study published in June by the National Academy of Sciences found

“It’s not an innate difference in math ability between males and females,” says Janet Mertz, a UW-Madison professor of oncology and one of the authors of the article that analyzes and summarizes recent data on math performance at all levels in the United States and internationally. “There are countries where the gender disparity in math performance doesn’t exist at either the average or gifted level. These tend to be the same countries that have the greatest gender equality.”

Gender bias and expectations are not the only thing we have to worry about. It’s not just girls––boys are losing interest too, according to the AMS research:

”The U.S. culture that is discouraging girls is also discouraging boys,” says Janet Mertz, a University of Wisconsin-Madison professor of oncology and the senior author of the study. “The situation is becoming urgent. The data show that a majority of the top young mathematicians in this country were not born here.”

[NOTE: While Janet Mertz was one of the authors on each study, the PNAS and AMS studies are two different projects. The latter, published Oct. 10 in the Notices of the American Mathematical Society, was a comprehensive analysis of decades of data on students identified as having profound ability in math (Science News Oct. 13, 2008). The other study was published June 1, 2009 in the Proceedings of the National Academy. It looked at US and international data on students of all levels of ability, to answer three key questions: “Do gender differences in math performance exist in the general population? Do gender differences exist among the mathematically talented? Do females exist who possess profound mathematical talent? The answers, according to the Wisconsin researchers, are no, no and yes.” (Science News June 2, 2009).

You may remember the remarks of Lawrence Summers in 2005 (he was then President of Harvard, and is now an economic adviser to President Obama), to the effect that innate differences between men and women might be one reason fewer women succeed in science and math careers. These two studies would support the conclusion that if innate differences do influence women’s lack of success in these fields, the differences are not in mathematical ability. Maybe we should look at “innate differences” in aggressiveness and willingness to withstand unduly competitive or even hostile treatment from colleagues and superiors. Or at insecurity and discomfort, innate or not, which arise in male academics and administrators when females display ability, competence, and promise. A few decades ago women rarely appeared in symphony orchestras unless they played the harp; auditions behind screens changed that! Did our musical ability transform itself overnight? Probably not. ]

[Photo from another good article on the AMS study]

Send an email for Ada and our kids, and consider how you yourself might interact with kids about math and science. Take a trip to the Science Museum if you are fortunate enough to live near one, read a book together, in general don’t act as if math and science are boring geek fare. Even if a lot of it is beyond you, as higher math seems to be beyond me, that doesn’t have to be true for the kids you know. Since I was in college, math has become much more important in biological sciences, ecology, even social sciences like history, so if I were a history major today I would probably need to take at least an introductory statistics class.

We all need to model a respect and interest for learning, to the kids around us. Kids start out as voracious learners: have you tried to learn another language lately? Hard, right? Babies do it, and young kids pick up second languages easily. They’re always learning, not just skills and processes but attitudes too, so let’s not convey bad attitudes about learning, reading, thinking!

Threshing grain at the historic farm

Posted on Wednesday, October 7, 2009 by nosleepingdog

Here’s the old-style threshing of the grain at Hanley Historic Farm, Oregon; the beautiful golden “stooks” of gathered and bundled grain stalks appeared in an earlier post.

These stooks of hand-cut wheat, composed of bundles each tied with a stalk of wheat, sat out for weeks drying, and waiting for the Harvest Day Event on September 4, when the draft horse enthusiasts and old ag machinery collectors would join forces.

First the big placid draft horses made their way down the field, stopping to let workers with hay-rakes pitch (that’s “pitch” as in “pitchfork”) the stooks up onto the wagon, seen in the first picture. Once the wagon’s full, it heads back to the “home” end of the field.

There, the old threshing machine awaits, attended by half a dozen or more other people who will fork the grain from the wagon onto a moving belt.

But first, line up the wagon next to the working area.

Then the horses are unhitched and led away; I thought perhaps this particular team did not like the noise of the machine, which was considerable. In 1900 or whenever this machine was made, a farmer’s team would probably be accustomed to the machine after a couple of acres had been worked, and would wait–––or two wagons could be used, hitching the team to an empty wagon to continue collecting the grain while the full wagon was threshed.

The entire machine is long, with belt-driven parts to move the unthreshed grain into the whirling blades that knock the grain off the stalks. The next step separates grain from chopped straw or chaff.

It may be a machine, but it is fed one fork of grain at a time.

Streams of grain and chaff are blown through long pipes: the chaff into a pile, the grain into heavy cloth bags.

As on every farm in the history of the world, there’s work for kids old enough to know the routine.

The filled bags are hand-sewn shut.

Once these threshing machines came into use, horses provided the power for only some of the work. The thresher itself ran from a steam, or later gasoline, engine powering the main belt. This day, a more modern machine was used for the Power Take-Off (PTO) to the thresher.

Here you can see the power belt, and the chopping teeth that actually do the threshing.

Although the chaff is just being blown onto a pile in the background here, it is not a waste material, but would be used for bedding in stalls during the winter. Mucked-out straw would be used for fertilizing fields or maybe the kitchen garden area. These days, commercially produced wheat straw is used for decorative interior panels, making ethanol, soil amendment, animal feed (treated with urea, and with nutrients added, yuk), paper, and packaging. Many new uses are being examined. And of course, it’s still good for animal bedding.

Our view of early machine threshing on this day didn’t show what hard work it would have been, when many acres of grain had to be gotten in before the weather changed, when teams of horses brought a continuous supply of grain to the people feeding it to the machine, and the labor of bending to sew bags and then tote them away never stopped. But, unlike a lot of physical work in the industrial age, it was not what you did 50 weeks a year. There’s a pride in getting it done

and those too young to take part look on, eager to be old enough.

And when the belt stops moving, the old hands find a spot in the shade.

Home Ground: Words of our native land

Posted on Thursday, September 17, 2009 by nosleepingdog

Home Ground: Language for an American Landscape, edited by Barry Lopez. Trinity University Press, San Antonio Texas, 2006.

One of the language byways I find fascinating is that of terms for landforms; they’re often based on metaphors (oxbow bend in a river, neck of land), some have ancient linguistic roots, others reflect the cultural history of an area with words from the language of indigenous people or early explorers. Those who share my interest will love this book, but it also has appeal for those who enjoy American regional writing or history, or are interested in how the landforms we see come into being.

Home Ground’s entries are in alphabetical order but it’s far richer than a dictionary. Entries are signed by their authors, who are mostly American writers with particular regional roots––novelists, poets, nature writers, scientists. From them we hear not just the definition and history of the term but also more diverse notes: political (the drowning of Celilo Falls in the Columbia River, by a dam, comes up in the entry for dalles), ecological, personal, and literary (quotations from hundreds of writers including Thoreau, Jack London, T.S. Eliot, Joel Chandler Harris, Pablo Neruda, Louis L’Amour, Joyce Carol Oates).

There are no fewer than three indexes: one for authors so quoted, one for terms (with cross-references), and one for specific place names mentioned: the San Andreas Fault, Satans Slab, South Dakota. And there are short biographies of the writers who produced the entries. With all this, you can browse the book or look for something specific like every mention of the Mississippi River, all the terms relating to ice, or mentions of Herman Melville.

If you have ever wondered what the difference is between a hill and a mountain, or among the words canyon/cleft/coulee/gorge/gully/ravine, you can find out right here. Terms run the gamut of languages––ronde, tseghiizi (Navajo), névé, krummholz, cuesta, gumbo (probably from a Central Bantu dialect), nunatuk, eddy (possbily Norse), erg (Arabic) and so on (although etymology is not always included). And they vary from the words of Western science (imbricated rock) to those of other observers (coyote well, paternoster lake).

And now, a few sample entries:

tule land

Tule land is a term recorded as early as 1856, just after gold rush. It usually refers to the flats of bulrushes and other reeds along the rivers of the West Coast. In the muddy shallows along the Sacramento, for example, as the river takes its time joining the San Joaquin and approaching the San Pablo and San Francisco Bays, there are vast thickets of reeds, home to waterfowl and fur-bearing animals. Tule lands are especially common at the junctures of rivers, where the slightest breeze will set the rushes whispering and rasping over the mud and standing water. The Wintu Indians called tule land “the storehouse of instant tools” because the rushes could be used to make so many things: mats, clothes, baskets, lodges, boats, and cradles, sandals, brooms, fish traps, and talismanic images. ROBERT MORGAN

nivation hollow

In A Walk in the Woods: Rediscovering America on the Appalachian Trail,
Bill Bryson wrote: “I never met a hiker with a good word to say about
the trail in Pennsylvania. It is, as someone told a National Geographic reporter in 1987, the place ‘where boots go to die.’…Mile upon mile of ragged, oddly angled slabs of stone strewn about in wobbly piles…These require constant attentiveness if you are not to twist an ankle or sprawl on your face––not a pleasant experience with fifty pounds of momentum on your back.” Such a hiker on the Appalachian Trail in Pennsylvania might just as well have been complaining about nivation hollows. A bowl-shaped depression in the ground, a nivation hollow begins to take shape when ice forms over a shallow rock basin beneath a snow bank. The ice freezes and thaws over time. During the warm period, melted snow seeps into the bottom of the hollow. During the cooler period, the seep water freezes. The rock breaks up, weathers, and erodes. Meltwater carries away the finer rock particles and the hollow becomes larger and deeper. MARY SWANDER

fil du courant

A Cajun French term meaning “thread of the current,” fil du courant is used to describe the optimal navigation course within a bayou or river. The fil is often visible as a glassy-smooth pathway through the otherwise ripping water. Louisiana shrimpers follow the fil du courant to avoid underwater obstructions and to secure sufficient depth for skim nets that extend winglike from either side of the vessel. MIKE TIDWELL

fall line

Fall line is a phrase both metaphoric and literal. In broader terms, it means the zone where the Piedmont foothills level out into the coastal plain, where sandy soil derived from marine deposits replaces rocky rolling land. On some southeastern rivers, such as in the Carolinas and Virginia, the Fall Line is a specific place where shoals and rapids once stopped navigation from the coast because ships couldn’t pass through. Cities such as Richmond, Fayetteville, and Columbia sprang up at the head of navigation, and mills and factories were built to take advantage of the water power at the falls and rapids. The abrupt change of elevation caused industry and commerce, courts and seats of government, to take root in those areas. ROBERT MORGAN

Line drawings, by Molly O’Halloran, illustrate some of the terms, such as this one for “Quaking Bog” which shows how peat, sphagnum, geologic forms, plants and water all combine to form this floating vegetative structure that will seem solid until stepped on. [The scan is much reduced, and for some reason tinted beige, unlike the original.]