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Monday, July 4, 2011

How to Avoid Retirement


How to Avoid Retirement

"It used to be that when you retired your title became X emeritus. That doesn't help you when you write up a grant application." - Anthony Norman
When biochemist Anthony Norman earned tenure at theUniversity of California (UC), Riverside, he thought he'd never have to apply for a job again. But that was before he retired.
Norman, a professor emeritus, continues to run the laboratory he started in 1963. But he recently became a professor of the Graduate Division, a title reserved for retirees who "are fully engaged in research and/or other departmental and campus activities," his new appointment letter says. Norman, who will draw his pension instead of a salary, believes the new position will help his post-retirement research career. "It used to be that when you retired your title became X emeritus. That doesn't help you when you write up a grant application," Norman says. In contrast to professor emeritus, professors of the Graduate Divisionprove their value every 3 years by passing the same departmental merit review used to grant pay raises to regular faculty members. "We have to jump through the same hoops as everyone else," he says.
Some universities, such as Norman's UC Riverside, are changing their policies to harness the skills of aging researchers. Others are not. The United States, Canada, Australia, New Zealand, and now the United Kingdom have all banned mandatory retirement. But Japan and many European governments still allow employers and funding bodies to restrict access to employment or funding opportunities for researchers eligible for retirement pensions. In response, some researchers leave before their universities ask them to.
One is immunologist Klaus Rajewsky. When he faced mandatory retirement in 2001 from the University of Cologne in Germany, Rajewsky moved to Harvard Medical School in Boston, where he continues to work full-time as an endowed chair in pediatrics and a professor of pathology. Next year, Rajewsky plans to return to Germany, where some institutions are making it easier for exceptional retirement-age researchers to stay active.

By any other name

One way to put off retirement is to obtain one of the emerging class of contracts that enable researchers to continue to work after retirement, assuming your institution offers them. The professor of the Graduate Division position at UC Riverside, for example, is very flexible, Norman says. A similar position at UC Berkeley, known as professor of the Graduate School, allows senior researchers to retain their colleagues' respect by letting them focus on what they're good at, says Jack Kirsch, a 76-year-old biophysical chemist at UC Berkeley, who retired from his departmental professorship at age 71 and took the title of professor of the Graduate School. Kirsch continues to pursue research and has started teaching a freshman seminar on art. "Clearly, I don't have the influence I used to," Kirsch says. But "people still come to me to ask about enzymes."
Anthony Norman

Anthony Norman (CREDIT: Anthony Norman)
Some European countries with a default retirement age, an age above which employers can force staff into retirement, have proposed alternatives to traditional retirement. In Germany, institutes such as the Helmholtz Centres and states such as Niedersachsen are offering research fellowships to researchers who have retired from their official jobs. In the Netherlands, sociologist Siegwart Lindenberg of the University of Groningen negotiated a 10-year extension that started at age 65, his university's default retirement age. He is paid from his pension and has a research grant from the university. He remains eligible to apply for new grants, though he believes that "the chance of getting them is lower once you are above 65."
Lindenberg started talking to his departmental colleagues 2 years before his impending retirement. "The reaction was, 'No, we can't do that because it's against the rules,' " he recalls. It was against the rules, but it was not against the law: The Netherlands allows workers to continue working beyond age 65. Lindenberg presented his dean with evidence of how he was still useful to the university, including a list of recent publications and continued invitations to collaborate. It took about a year to turn his dean into an ally and another year to persuade the university to agree to an unusual contract that allows him to focus on his research. "When you stay on, they let you concentrate on your stronger points rather than on [departmental administration] duties," he says.
Siegwart Lindenberg

Siegwart Lindenberg (CREDIT: Siegwart Lindenberg)
Such new roles offer professors a chance to redefine the final years of their careers. They are encouraged to recognize their limits and abide by them. Lindenberg, for example, says he won't take on new Ph.D. students anymore but will help supervise those of his colleagues. Sacrificing some power to younger colleagues may be a fair price to pay to keep doing research, Kirsch suggests. "In a way, it hurts your ego to lose power, but it's as it should be."

Jumping ship -- with a lifeline

Some places still enforce mandatory retirement policies, or at least apply pressure. Sometimes the pressure is informal: Colleagues suggest that a senior professor hand over the reins to a particular course, Kirsch says, or they stop offering to collaborate on research projects. Other times the pressure comes from the national legal framework or from institutions' standard practices. Rajewsky was offered an opportunity to stay at Cologne and keep his lab space, but the offer was subject to short-term approvals by his colleagues. He refused.
Jack Kirsch

Jack Kirsch (CREDIT: Jack Kirsch)
In such cases, the best options are elsewhere, at times within the same country. In Japan, most national universities force researchers to retire at 65, but there are some exceptions. At Kyoto Prefectural University of Medicine, neurophysiologist Minoru Kimura faced mandatory retirement at 63. He left when he was 62 for Tamagawa University in Tokyo, which made him director of its Brain Science Institute and won't ask him to retire until he is 68. "Many active people are unhappy to stop working," Kimura says.
Making a successful move requires a lot of logistical planning. Kimura brought colleagues and laboratory equipment to Tamagawa. It helped that he was already collaborating with people there and that two of his postdocs were eager to follow because "it is not easy to find a different institute in the same field," he says. Things went so smoothly that "2 months was enough for me to restart in this institute." Now he is working at least as hard as he was before.
Minoru Kimura

Minoru Kimura (CREDIT:Tamagawa University/ Minoru Kimura)
Some researchers who left home to avoid mandatory retirement are finding opportunities to come back. Regional governments are starting to reconsider rules and offer workarounds. Last year, one such change allowed Rajewsky, aged 74, to accept an offer to return. He insisted on one condition, which his new institution, the Max Delbrück Center for Molecular Medicine in Berlin, granted: "I would not go back to a job which had a time limit."
The keys to finding, obtaining, and moving smoothly into post-retirement jobs, older researchers say, are strong connections with colleagues and a compelling track record. Bringing in your own funding can also help: Rajewsky will return to Germany with a 5-year, €2.5 million Advanced Investigator Grant from the European Research Council. Outside offers also can remind your institution of your value, says Lindenberg, who obtained a concurrent part-time post at Tilburg University in the Netherlands. Still, he says, "a better strategy is to show that you're still very valuable to the university" by presenting a portfolio and a plan for how you'll contribute to your department.

Finding showing human ancestor older than previously thought offers new insights into evolution



Modern humans never co-existed with Homo erectus—a finding counter to previous hypotheses of human evolution—new excavations in Indonesia and dating analyses show. The research, reported in the journal PLoS One, offers new insights into the nature of human evolution, suggesting a different role for Homo erectus than had been previously thought.
Meet 'Mrs Ples' who was unearthed in Sterkfontein, South Africa in 1947. Her whole skull was found and it is believed she lived 2.5million years ago. Sediment traces found on the inside of her skull indicate to scientists that she died by falling into a chalk pit.
The work was conducted by the Solo River Terrace (SoRT) Project, an international group of scientists directed by anthropologists Etty Indriati of Gadjah Mada University in Indonesia and Susan Antón of New York University.
Homo erectus is widely considered a direct human ancestor—it resembles modern humans in many respects, except for its smaller brain and differently shaped skull—and was the first of our ancestors to migrate out of Africa, approximately 1.8 million years ago. Homo erectus went extinct in Africa and much of Asia by about 500,000 years ago, but appeared to have survived in Indonesia until about 35,000 to 50,000 years ago at the site of Ngandong on the Solo River. These late members of Homo erectus would have shared the environment with early members of our own species, Homo sapiens, who arrived in Indonesia by about 40,000 years ago.
The existence of the two species simultaneously has important implications for models about the origins of modern humans. One of the models, the Out of Africa or replacement model, predicts such overlap. However, another, the multiregional model, which posits that modern humans originated as a result of genetic contributions from hominin populations all around the Old World (Africa, Asia, Europe), does not. The late survival of Homo erectus in Indonesia has been used as one line of support for the Out of Africa model.
However, findings by the SoRT Project show that Homo erectus’ time in the region ended before modern humans arrived there. The analyses suggest that Homo erectus was gone by at least 143,000 years ago—and likely by more than 550,000 years ago. This means the demise of Homo erectus occurred long before the arrival of Homo sapiens.
“Thus, Homo erectus probably did not share habitats with modern humans,” said Indriati.
The SoRT Project’s investigations occurred in Ngandong and Jigar, two sites in the “20-meter terrace” of the Solo River, Indonesia. The sediments in the terrace were formed by the flooding of the ancient river, but currently sit above the Solo River because the river has cut downward through time. The terrace has been a rich source for the discovery of Homo erectus and other animal fossils since the 1930s.
As recently as 1996, a research team dated these sites of hominin, or early human, fossils to as young as 35,000-50,000 years old. The analyses used a technique that dates teeth, and thus provided ages for several animals discovered at the sites. However, other scholars suggested the sites included a mixture of older hominins and younger animals, raising questions about the true age of the hominin remains.
The goal of the SoRT team, which included both members of the 1996 group and its critics, was to understand how the sites in the terrace formed, whether there was evidence for mixing of older and younger remains, and just how old the sites were.
This species of sub-human - Homo rudolfensis - was found in Koobi Fora, Kenya, in 1972. The adult male is believed to have lived about 1.8million years ago. He used stone axes ate meat and plants and lived on the wooded edge of Lake Turkana in Eastern Africa.
Since 2004, team members have conducted analyses of animal remains, geological surveys, trenching, and archaeological excavations. The results from all of these provide no evidence for the mixing of older and younger remains. All the evidence suggests the sites represent just a short time period.
“The postmortem damage to the animal remains is consistent and suggests very little movement of the remains by water,” explained Briana Pobiner, the project’s archaeologist and a paleoanthropologist at the Smithsonian Institution’s National Museum of Natural History. “This means that it is unlikely that very old remains were mixed into younger ones.”
In addition, clues from the sediments exposed during excavation suggest to the projects’ geoarchaeologists, Rhonda Quinn, Chris Lepre, and Craig Feibel, of Seton Hall, Columbia, and Rutgers universities, that the deposits occurred over a short time period. The teeth found in different excavation layers at Jigar are also all nearly identical in age, supporting the conclusion that mixing across geological periods did not occur.
“Whatever the geological age of the sites is, the hominins, animals, and sediments at Ngandong and Jigar are all the same age,” said project co-leader Susan Antón.
The team applied two different dating techniques to the sites. Like earlier work, they used the techniques—U-series and Electron Spin Resonance, or ESR—that are applied to fossilized teeth. They also used a technique called argon-argon dating that is applied to volcanic minerals in the sediments. All three methods use radioactive decay in different ways to assess age and all yielded robust and methodologically valid results, but the ages were inconsistent with one another.
The argon-argon results yielded highly precise ages of about 550,000 years old on pumices—very light, porous volcanic products found at Ngandong and Jigar.
“Pumices are hard to rework without breaking them, and these ages are quite good, so this suggests that the hominins and fauna are this old as well,” said project geochronologist Carl Swisher of Rutgers University.
By contrast, the oldest of the U-series and ESR ages, which were conducted at Australian National University by Rainer Grün, are just 143,000 years.
The difference in the ages means that one of the systems is providing an age for something other than the formation of the sites and fossils in them. One possibility is that the pumices are, in fact, reworked, or mixed in, from older rocks. The other possibility is that the ESR and U-series ages are dating an event that occurred after the sites were formed, perhaps a change in the way groundwater moved through the sites.
Either way, the ages provide a maximum and a minimum for the sites – and both of these ages are older than the earliest Homo sapiens fossils in Indonesia. Thus, the authors concluded that the idea of a population of Homo erectus surviving until late in time in Indonesia and potentially interacting with Homo sapiens seems to have been disproven.

China scientists genetically modified cows to produce human breast milk



BEIJING – Chinese scientists have genetically modified dairy cows to produce human breast milk, and hope to be selling it in supermarkets within three years.
The milk is still undergoing safety tests, but with government permission it will be sold to consumers as a more nutritious dairy drink than cow's milk.
The milk produced by the transgenic cows is identical to the human variety and has the same immune-boosting and antibacterial qualities as breast milk, scientists at China’s Agricultural University in Beijing say.
The transgenic herd of 300 was bred by inserting human genes into cloned cow embryos which were then implanted into surrogate cows.
The technology was similar to that used to produce Dolly the sheep.
The milk is still undergoing safety tests but with government permission it will be sold to consumers as a more nutritious dairy drink than cow’s milk.
Workers at the university’s dairy farm have already tasted the milk, and say it is sweeter and stronger than the usual bovine variety.
There are 1.5 billion people in the world who don’t get enough to eat. It’s our duty to develop science and technology, not to hold it back. We need to feed people first, before we consider ideals and convictions. -Professor Li Ning, director of the research project quoted.
“It’s good,” said worker Jiang Yao. “It’s better for you because it’s genetically modified.”
The scientists have also produced animals that are resistant to mad cow disease, as well as beef cattle that are genetically modified to produce more nutritious meat.
The director of the research project, Professor Li Ning, says Western concerns about the ethics of genetic modification are misplaced.
“There are 1.5 billion people in the world who don’t get enough to eat,” he said. “It’s our duty to develop science and technology, not to hold it back.
“We need to feed people first, before we consider ideals and convictions.”
In contrast to Europe, China has eagerly embraced genetically modified food.
Genetically modified cooking oil, papayas, tomatoes and potatoes are already widely available.
Insect-resistant rice and corn modified to help pigs absorb more nutrients were both recently approved by the government.

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