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Monday, July 20, 2009

* Earth Sciences * Astronomy * Environment * Space Exploration Astronauts deal with flooded toilet in orbit

By MARCIA DUNN , AP Aerospace Writer Astronauts deal with flooded toilet in orbit (AP)

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This image provided by NASA shows the underside of the crew cabin near the nose cap of the Space Shuttle Endeavour taken by an Expedition 20 crewmember during a survey of the approaching vehicle prior to docking with the International Space Station Friday July 17, 2009. Endeavour crew performed a back-flip for the rendezvous pitch maneuver. Mission Control said Saturday Endeavour looks to be in fine shape for re-entry at the end of the month. Areas where the heat tiles were dinged during Wednesday's launch can be seen in this image. (AP Photo/NASA)

(AP) -- The bathroom lines at the already crowded space shuttle and space station complex got a lot longer Sunday because of a flooded toilet. One of two commodes aboard the international space station malfunctioned, right in the middle of complicated robotic work being conducted by the two crews. The pump separator apparently flooded.

Mission Control advised the astronauts to hang an "out of service" sign on the until it could be fixed. In the meantime, the six space station residents had to get in line to use their one good toilet. And Endeavour's seven astronauts were restricted to the shuttle bathroom.

There have never been so many people - 13 - together in space. The toilet repair work fell to Belgian Frank De Winne, who had to don goggles, gloves and a mask.

Flight director Brian Smith declined to speculate whether overuse caused the toilet trouble.

"We don't yet know the extent of the problem," Smith told reporters. "It may turn out to be of no consequence at all. It could turn out to be significant. It's too early to tell right now."

Teams of specialists in Houston and Moscow hurriedly convened to discuss the problem. The Russian-built, multimillion-dollar toilet flew up on a shuttle last November.

Smith said there is no urgency to the bathroom situation, at least for now. But he said if the toilet remains out of action for several days, "then we'll readdress the situation and see what we have to do."

Going into this mission, NASA wanted at least four of Endeavour's crew to use the space station's bathrooms, so the shuttle tank would not fill up.

As long as Endeavour is docked to the space station, it cannot eject any waste water. The nozzle is located near the newly installed porch on the Japanese lab; the attach mechanisms for experiments could corrode if sprayed by water.

Two bathrooms ultimately are needed for a full station crew of six. Smith said he did not know how long six occupants could rely on a single toilet.

Both the shuttle and station are equipped with other ways for the astronauts to relieve themselves, Smith said, including Apollo-era urine collection bags.

Much of Sunday - the eve of the 40th anniversary of man's first moon landing - was spent using a pair of robot arms to move a large cargo carrier, loaded with batteries and spare parts, from the shuttle to the station. It was a relatively quiet day sandwiched between spacewalks.

The 13-by-8-foot platform holds an antenna, pump and engine for the station's rail car, all of which will be removed and secured to the space station during a spacewalk Monday. NASA wants to store as many big spare parts as possible at the space station, before shuttles stop flying at the end of next year.

Also on the carrier are six batteries that will be plugged into the station by spacewalking later in the week, replacing old batteries.

In all, five spacewalks are planned during Endeavour's 1 1/2-week space station visit.

As for the Apollo 11 anniversary, Smith noted that the Mercury, Gemini and Apollo programs contributed to today's . He observed that he wasn't born when Neil Armstrong and Buzz Aldrin walked on the moon July 20, 1969; neither were two of the 13 spacefarers.

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Cooking With Sound: Bio-Mass Burning Stove Also Converts Heat Into Sound Then Electricity


Researchers are developing a bio-mass burning cooking stove which also converts heat into acoustic energy and then into electricity, all in one unit. (Credit: Image courtesy of University of Nottingham)

A low-cost generator with the potential to transform lives in the world’s poorest communities is now being tested across the UK and in Nepal. The Score project, led by The University of Nottingham, is developing a bio-mass burning cooking stove which also converts heat into acoustic energy and then into electricity, all in one unit.

The £2 million Score project (Stove for Cooking, Refrigeration and Electricity) brings together experts from across the world to develop the biomass-powered generator. By developing an affordable, versatile domestic appliance Score aims to address the energy needs of rural communities in Africa and Asia, where access to power is extremely limited.

Researchers in the Department of Electrical and Electronic Engineering at The University of Nottingham are working on the generator’s Linear Alternator — the part which turns the sound energy into electricity. The system uses special configurations of magnets which generate electrical energy from sound. Computer simulations of the linear alternator have proved successful, and test models are currently being constructed in the department’s workshops.

Nottingham researchers are working with Dai-ichi, one of Malaysia’s largest loudspeaker manufacturers, to bring down production costs through good design practice. Though the Score unit does not physically resemble the average loudspeaker, it is compatible with the Dai-ichi manufacturing process.

Score has been invited by Dai-ichi to exhibit at the “Better City Better Life” EXPO 2010 in Shanghai China from May to October 2010 to showcase its new advanced technology to 70 million expected visitors.

The aim of the Score project is to make a low-cost, high efficiency generator that can be used in the world’s poorest countries. The generator has a cost target of £20 per household, based on the production of a million units. The generator will weigh between 10 and 20kg. The target is to generate an hour’s use per kilogram of fuel — which could be wood, dung or any other locally-available biomass material.

Dr Chitta Saha, Research Assistant at Nottingham said: “The current Linear Alternator design is very exciting for me as it solves many of the problems we had with using loudspeakers as alternators, but can still be made cheaply. My mum lives in Bangladesh — she is so proud that I am working on such a worthwhile project that she can see will help her community.”

The University of Manchester, City University London and Queen Mary, University of London and the Charity Practical Action are partners in the project — from researching engine design to the manufacture and distribution of the stove in the developing world. The project will work with governments, universities and civil organisation across Africa and Asia, many of whom have already offered support. This collaboration will ensure the device is affordable, socially acceptable and that there is scope for communities to develop businesses to manufacture and repair locally.

Mark Johnson, Professor of Advanced Power Conversion at Nottingham, said: "I am particularly pleased with the way that the Score consortium, with partners from very different technical backgrounds, has developed into a cohesive research team. We now have solutions to the fundamental technical problems and the first demonstrators delivering significant electrical power, have been realised"

The Score team is now looking for sponsorship to fund testing in the countries in which the generator will eventually be deployed. Indeed Germany’s Department of International Development (GTZ South Africa) has already signed a Memorandum of Understanding to provide funding to test the stove in southern Africa.

Paul H Riley, Score Project Director says “We have had tremendous interest in the Score project from around the world and the Score community —launched a few months ago — is working extremely well. This includes entrepreneurs and volunteers that adapt the stove for local use among its members.”

Practical Action, a charity which promotes the development of sustainable technology to tackle poverty in developing countries, is already leading field trials in Nepal and Kenya. The charity will expand the test sites when more units are made available.

Score community member Mark Loweth works in Tajikistan, one of the poorer countries in Central Asia. He has adapted a variation of a Score Stove to ensure it is suitable for the communities it is aimed at.

“We are very excited with the Score technology as it has the capability of bringing small scale electrical generation to households in the developing world,” he said.

“We plan to field test 20 units in Tajikistan when funding is available through a jointly owned, locally registered company utilising the experience and extensive local knowledge of expatriates and nationals with strong links to rural communities.”

Other members of the international Score Community are investigating how a Score Stove could best be adapted for their local environments.

South African Score community member Rynier Ferreira said: “We are adapting a Score Stove to work with paraffin (kerosene) as many rural communities in South Africa are still highly dependant on it as a major fuel source for cooking. Adapting a Score Stove for paraffin will increase not only the safety aspect for stoves using this type of fuel, but will give the people in these rural communities the additional advantage of electricity and refrigeration.”

Gorge Crowson is also testing the stove in southern Africa after joining the Score community: He said: “We have identified a number of waste materials that can be burnt in a Score Stove and are actively seeking financial support to set up assembly plants in Southern Africa and a distribution network, once the test phase is completed.”

It’s thought that more units will be available for testing in field trials at the start of next year, with full production of the Score generator taking place after 2012.

The Score consortium is funded by grants from the Engineering and Physical Sciences Research Council as part of its initiative on energy and international development.

Kees deBlok of Aster Thermoakoestische Systemen in the Netherlands and Scott Backhaus of Los Alamos International Laboratories are acting as consultants to the Score project.

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City bees are all the buzz

Veteran beekeeper Jim Fischer consults with a newcomer.

(Mary Knox Merrill/Staff/The Christian Science Monitor)

By Bridget Huber


Mary Knox Merrill/Staff/The Christian Science Monitor

A new beekeeper inspects a hive at her Manhattan home. Beekeeping is illegal in the city and can carry a $2,000 fine. But urban gardeners are pushing for passage of a bill, introduced by a city councilor, that would lift the ban – and boost pollination and honey production. Some other cities allow the practice.


New York

Honeybees may not be the first thing that come to mind when you think of Brooklyn. Yet here’s Yeshwant Chitalkar, high on a rooftop in the Red Hook section of the New York borough, opening a bright blue hive to check on its queen. The vista is a mix of parks, light industrial areas, and housing projects. Dr. Chitalkar works methodically, barehanded, carefully lifting out the hive’s frames, which are covered in a velvety, undulating layer of bees.

He is one of a growing number of urbanites who keep bees in cities across the country. Their motivations vary: Some are worried about the environmental impact of fewer bees to pollinate food crops. And some are urban gardeners who want to make their gardens more productive. Others say beekeeping is a way to connect with nature even in the heart of the concrete jungle.

Oh, and there’s the honey, too. Counterintuitive as it might seem, urban hives are generally as productive and healthy as rural ones. In a good year, one hive can produce up to 200 pounds of honey.

Urban beekeeping isn’t all sweet, though. It can be hard, dirty work and the challenges are many: jittery neighbors; vandals; city ordinances banning the activity; and problems, such as mites and parasites, that vex beekeepers everywhere.

But that doesn’t daunt those who want to keep bees. This year there are at least 30 new hives in community gardens, on rooftops, and in backyards across New York. Most are the result of a series of beekeeping classes taught last winter by Jim Fischer, a veteran beekeeper who lives in Manhattan.

Mr. Fischer and some of his students formed the Gotham City Honey Co-op to buy beekeeping equipment in bulk, and hope eventually to set up a site where members can extract and bottle their honey. The co-op also plans to brand its honey and sell it to specialty stores.

The only hitch: Beekeeping is illegal in New York City.

Mr. Fischer and other Big Apple beekeepers are confident that the honeybee ban will be lifted soon. A city councilor has introduced a bill to legalize it, and urban gardening groups are pushing for it to be passed.

The situation is quite different in Chicago, where City Hall’s green roof boasts a beehive. Michael Thompson, who helped install the city-owned hive, has been keeping bees within the city limits since the 1970s.

Today he is the farm manager at the Chicago Honey Co-op, which has about a hundred hives on the city’s West Side. Many belong to people who give half their honey to the co-op in exchange for keeping their hives at the site.

The city is an ideal spot for bees, Mr. Thompson learned when he moved there from a rural area where he kept bees.

“It’s much better to keep bees in a city,” he says. In rural and suburban areas, pesticides sprayed for agriculture and mosquito control can also harm bees. But in the city, the use of these kinds of pesticides is less widespread.

“People have the perception that a hive in the city can’t make any honey at all,” Fischer says. “That’s just not true.”

Honeybees can find abundant nectar in parks and along tree-lined boulevards. Also, urban areas often have extensive ornamental gardens in bloom throughout the growing season.

But Nick Calderone, associate professor of entomology at Cornell University in Ithaca, N.Y., injects a note of caution. He says that hives can thrive in cities only if they’re near green spaces or gardens.

Many of the beekeepers Fischer knows are urban gardeners who began keeping bees because they wanted to increase their crops’ productivity. “If you want local food, you need local bees,” he says.

That’s why Roger Repohl of the Bronx became a beekeeper 10 years ago. Although his plants had plenty of flowers, they produced few vegetables. When he asked for advice from someone in the city’s Parks Department, he was told: “ ‘Oh, we don’t have pollinators in the South Bronx,’ ” he relates.

Although “some pollination is done by wind and rain, the majority is done by insects – including beetles, flies, butterflies, and, most significantly, by bees,” says Dr. Calderone. Many native species of bees are important pollinators, but their numbers have declined as their habitat has disappeared to development and large-scale agriculture.

Honeybees, which aren’t native to the United States, are used as pollinators on large farms as well as in personal gardens. But they are struggling, too.

The number of managed honeybee colonies in the US has dropped from 5 million to 2.5 million since the 1940s, according to the US Department of Agriculture.

And two mites that appeared in the US in the 1980s have been wreaking havoc on honeybee colonies since, says Calderone. Before their advent, home beekeepers might have lost 5 percent of their colonies per year and a migratory beekeeper 10 to 15 percent. Now, during bad years, beekeepers may lose five times that many colonies.

Then there’s the little-understood but much-publicized disease known as colony collapse disorder (CCD), which causes the mysterious disappearance of adult bees from colonies. While CCD’s cause is still not understood, “it’s certainly real and it’s certainly killing lots of bees, but exactly what it is, is hard to say,” says Calderone.

In urban areas, these problems haven’t discouraged gardeners from becoming beekeepers, And that’s good for all residents of the city, says Calderone. “Unless you want a totally sterile environment that’s devoid of all life other than people, you’re going to need plants. And to keep them functioning, you’re going to need pollinators.”

Toni Burnham, who blogs about urban beekeeping (City Bees), was inspired to start hives after hearing about London beekeepers. She has established several hives and was a consultant on the successful effort to put beehives on the White House lawn.

She sees beekeeping as a key part of maintaining a healthy city. “If those plants that are the bottom line for ecological health in my town can produce adequate fruit and leaves, there’s a whole range of bugs, snakes, and birds that can survive,” she says.

One of the biggest challenges for urban beekeepers is neighbors who are unhappy about living near beehives. Many people are afraid of bees, and much of that fear is rooted in misunderstanding, says Fischer.

Since bee populations have declined, people understand them less, says Fischer, who as a child spent the summers playing baseball barefoot. Back then, grass-seed mixes included red clover, a bee favorite. Inevitably, children stepped on bees. There were tears, but parents took it in stride – “the response was a hug and a cookie,” he says.

Today, many people mistake one bodily response to a bee sting – some swelling and itching – for an allergic reaction and take their children to the emergency room, Fischer says.

If their nests are threatened, bees will sting. But, Calderone says, they don’t generally do so when away from their nests.

Still, bee swarms, which occur when part or all of a colony leaves its home en masse to find a new one, make headlines. Fischer, who is frequently called to remove them in New York, once was called to a site where a swarm had landed on a newspaper box. When he got there, police had closed the intersection and cordoned off the area with yellow crime scene tape. Several television crews were filming. “Swarms scare the civilians,” he says.

But swarms aren’t particularly dangerous, he says. The bees may number in the thousands, but lack a hive to defend and are focused on finding a new home, although they will sting if provoked. Fischer calls them “the most docile configuration of bees.”

Still, “it’s important to cultivate respect for [honeybees]. They’re not chickens, cats, or dogs,” says Mr. Repohl, whose community garden regularly hosts school groups.

Keeping bees may have another benefit for busy city dwellers – encouraging them to slow down. Ms. Burnham, who says she’s the type of person who drinks too much coffee and waves her hands around when she’s talking, likens beekeeping to yoga: “I plan my movements, and I do them deliberately. I’m thinking about the effect of my motions on these creatures. I have to be in a different way,” she says.

Michaela Hayes, who has a new hive in Brooklyn, agrees. “I love the bees; they’re so peaceful,” she says. Ms. Hayes dreams of the day when she’ll make ginger beer from her honey, but for now she’s content to watch the bees as they go about their business. “They’re fascinating to me. It’s kind of like a big science experiment for adults.”

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