Tuesday, April 30, 2013

Mood in Photos Can Be Judged Using New Happiness Tracking Software

Medindia Health News
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Mood in Photos Can Be Judged Using New Happiness Tracking Software
Apr 30th 2013, 18:23


Abhinav Dhall at the Australian National University in Canberra and his team used face tracking software to analyse the smiles of the faces in a group by noting the positions of nine spots on the face such as the corners of the mouth and eyes.

A machine learning algorithm, trained on photos that had been pre-labelled by humans, then used this data to give each face a smile intensity score.

The team also programmed the system to incorporate information from volunteers, who assessed how important the intensity of any individual's smile was to the overall mood score of a photo.

Those who were standing near the centre of a picture were given a stronger weighting, for example, while partially obscured faces were less influential. When asked to gauge the happiness level of a photo, the system only deviated from the opinion of a human by around 7 per cent.

Dhall said that the aim is to be able to assess the overall mood of a group from a single shot.

By looking at a sequence of frames in a video, it could even gauge the mood of a crowd in real time.

"If the mood score goes down over the time, we can assume that the group are getting angry," said Dhall.

It could also be used to view albums on Facebook by arranging photos so the happiest ones are shown first, for example.

The software was presented at the Conference on Multimedia Retrieval in Dallas, Texas, last week.

Source-ANI

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Research Explains How Plants Counter Climate Warming

Medindia Health News
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Research Explains How Plants Counter Climate Warming
Apr 30th 2013, 18:23


The study from IIASA and the University of Helsinki identified a negative feedback loop in which higher temperatures lead to an increase in concentrations of natural aerosols that have a cooling effect on the atmosphere.

"Plants, by reacting to changes in temperature, also moderate these changes," said IIASA and University of Helsinki researcher Pauli Paasonen, who led the study.

Scientists had known that some aerosols - particles that float in the atmosphere - cool the climate as they reflect sunlight and form cloud droplets, which reflect sunlight efficiently.

Aerosol particles come from many sources, including human emissions. But the effect of so-called biogenic aerosol - particulate matter that originates from plants - had been less well understood.

Plants release gases that, after atmospheric oxidation, tend to stick to aerosol particles, growing them into the larger-sized particles that reflect sunlight and also serve as the basis for cloud droplets. The new study showed that as temperatures warm and plants consequently release more of these gases, the concentrations of particles active in cloud formation increase.

"Everyone knows the scent of the forest. That scent is made up of these gases," said Ari Asmi, University of Helsinki researcher who also worked on the study.

While previous research had predicted the feedback effect, until now nobody had been able to prove its existence except for case studies limited to single sites and short time periods. The new study showed that the effect occurs over the long-term in continental size scales.

The effect of enhanced plant gas emissions on climate is small on a global scale - only countering approximately 1 percent of climate warming, the study suggested.

"This does not save us from climate warming," said Paasonen. However, he stated, "Aerosol effects on climate are one of the main uncertainties in climate models. Understanding this mechanism could help us reduce those uncertainties and make the models better."

The study also showed that the effect was much larger on a regional scale, counteracting possibly up to 30percent of warming in more rural, forested areas where anthropogenic emissions of aerosols were much lower in comparison to the natural aerosols.

The study was published in Nature Geoscience.

Source-ANI

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Willem-Alexander Becomes Europe's Youngest Monarch

Medindia Health News
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Willem-Alexander Becomes Europe's Youngest Monarch
Apr 30th 2013, 18:23


Willem-Alexander, 46, will be the first Dutch king since 1890 and the first of a new wave of European monarchs, with the average age of the current cohort at 71.

Amsterdam's population is set to double with at least 800,000 visitors flooding the city's streets and canals as Beatrix, 75, ends her 33-year reign by signing the act of abdication at the royal palace.

While Beatrix was known for her formal court, Willem-Alexander has already said that he and his glamourous Argentine-born queen consort Maxima, 41, will not be "protocol fetishists".

The king will be sworn in rather than crowned at deconsecrated church Nieuwe Kerk, a stone's throw from the palace, before a joint session of the houses of parliament.

The investiture will be attended by a number of other royals-in-waiting -- protocol dictates that reigning sovereigns are not invited -- and will include Britain's Prince Charles, Spain's Prince Felipe and Japan's Prince Naruhito and his wife, Crown Princess Masako, who is on her first trip abroad in nearly seven years.

Beatrix's enthronement in 1980 was marred by violent protests and running street battles over a housing crisis that left the city looking like a war zone.

Anti-royalists this time have been allotted six locations in Amsterdam to stage protests. But only one has been booked by Republicans planning playful protests, including by wearing white.

Preparations for the day have been overshadowed by a rancorous debate about the event's official song, known as the Koningslied.

An online petition rejecting the song, an unusual mix of traditional and rap music, garnered 40,000 signatures within a few days.

Composer John Ewbank withdrew the song but the enthronement organising committee stuck with it.

The nation will now sing the Koningslied as one on Tuesday evening, just before the royal family heads off on a water pageant behind Amsterdam's central train station.

A cornucopia of concerts and club nights has been organised around the city, including an open-air set by world-famous Dutch DJ Armin van Buuren, and orange-themed street parties are planned across the nation.

The day will also be tinged with sadness for Maxima, whose father, Jorge Zorreguieta, and mother will be notable by their absence.

Zorreguieta, 85, a minister under the notorious Argentine regime of general Jorge Videla in the 1970s, also had to miss his daughter's 2002 marriage because of doubts over his role in the murderous junta.

Maxima is largely responsible for having made her husband popular after an allegedly boozy youth which earned him the nickname "Prince Pils".

Ever smiling, she has mastered the Dutch language and even taken a charity swim in Amsterdam's canals, endearing herself further in a country that expects their royals to be at once normal and regal.

Willem-Alexander's brother Friso will also be missed, in a coma following a skiing accident in Austria in February 2012.

Speaking ahead of the enthronement, Willem-Alexander said that "People can address me as they wish because then they can feel comfortable."

He stressed he wanted to "be a king that can bring society together, representative and encouraging in the 21st century".

Source-AFP

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Use of Deep Brain Stimulation Offers Promise For Surgical Treatments

Medindia Health News
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Use of Deep Brain Stimulation Offers Promise For Surgical Treatments
Apr 30th 2013, 18:23


And that the AcbSh could be a target in the future for surgical intervention of addiction. The researchers revealed it during the 81st American Association of Neurological Surgeons (AANS) Annual Scientific Meeting

Researchers used alcohol-preferring (P) rats as an animal model for alcoholism, with the study assessing whether HFS of the AcbSh in P rats would affect their alcohol consumption. For the study, rats underwent 10 weeks of daily one-hour access to EtOH to establish alcoholism.

Source-Newswise

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Snoring Woes of Women Soar

Medindia Health News
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Snoring Woes of Women Soar
Apr 30th 2013, 18:23


Alarmingly, one out of three snorers is women and they are quite worried about the health consequences. Specialists are blaming obesity for this problem, as many women are grappling with expanding waistlines and overweight issues. It is estimated that nearly two percent of women are suffering from sleep apnea, which ups the risk of heart disease.

According to Epworth Sleep Centre director, Dr Darren Mansfield, more number of women are now coming forward to seek help. This is due to increased awareness of this condition and associated risks.

"Certainly there's a strong link between sleep apnea and cardiovascular risk. I think that message is now out there. Women take their health quite seriously as a general rule and once there's a clear link to this and other health consequences, women perhaps even more so than men, are more likely to come forward and have the issue addressed, " he said.

Source-Medindia

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Unethical Behavior Among Physicians Threatens Public Trust

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Unethical Behavior Among Physicians Threatens Public Trust
Apr 30th 2013, 18:23


Reacting to CNN reports last year about the widespread use of "recalls" and "airplane notes" by radiology and dermatology residents, Gregory W. Ruhnke, MD, MS, MPH, of the Department of Medicine, University of Chicago, and David J. Doukas, MD, of the Department of Family and Geriatric Medicine, University of Louisville, call on leaders in medical education to establish guidelines and change the culture of medical school and training programs.

Illegal reproduction and transmission of board certification examination questions have received wide public attention recently. In 2010, the American Board of Internal Medicine (ABIM) suspended or revoked the certification of 139 physicians found to be disclosing or soliciting examination questions for a board review prep company in New Jersey; the company encouraged physicians to recall questions from memory and convey them to the course director for inclusion in course materials. In early 2012, CNN revealed that doctors training to become dermatologists and radiologists had for years shared exam questions by memorizing them and writing them down after their board certification examinations.

Ruhnke and Doukas say there is a crucial distinction between cheating and guided study, noting that historical test questions are routinely used throughout higher education. They cite the American College of Physicians' Medical Knowledge Self-Assessment Program, which includes a summary of high-yield information vetted by post-examination residents to choose material likely to appear on future examinations. Some physicians have defended the use of "recalls." Moreover, "the difference between the use of questions reproduced verbatim and a focused study guide based on examinee input lies in the detail and specificity of information transmitted," they say.

The authors review the literature and discuss what drives dishonest behavior. Cheating is surprisingly common among medical students, with estimates ranging widely between five and 88%. Of medical students surveyed, 59% believed that cheating was impossible to eliminate because of its pervasiveness. Perhaps of greatest concern for the public, cheating on examinations by medical students correlates with falsifying information in a patient's medical record.

"Difficult exam content unnecessary for clinical care, the desire to assist friends, and peer behavior are important factors," says Ruhnke. For example, subjects not immediately relevant for clinical care, such as biochemistry and pharmacology, are seen as a "rite of passage." Assignment and test content that medical students view as unnecessary for clinical care makes them more likely to cheat.

The authors consider a number of potential interventions that might reduce the impetus to reproduce questions in verbatim form, such as not reusing test questions and the return of oral examinations, but recognize separate challenges of such solutions. Avoiding the reuse of test questions might threaten the statistical reliability and consistency of passing standards. In addition, harsh punishments are unlikely to be completely effective because their impact on peer behavior is not sufficiently powerful.

The authors urge the American Board of Medical Specialties and the Association of American Medical Colleges to establish guidelines regarding the detail and specificity of information that examinees may ethically disclose, and to be proactive in requiring examinees to acknowledge that reproduction or dissemination of test materials is both illegal and a violation of professional standards.

"Successful certification must demonstrate that physicians are vested with the trust of their peers but also the public. Sponsoring rigorous examinations that cover material critical for patient care will bolster what the profession provides to patients," according to the authors. "The literature suggests that this can best be achieved by embedding academic honesty into institutional cultures. Ultimately, the sanctity of our profession and the faith that patients place in us as physicians demands the highest moral standards."

In an accompanying Editorial, Christine K. Cassel, MD, Eric S. Holmboe, MD, and Lorie B. Slass, MA, of the American Board of Internal Medicine (ABIM), Philadelphia, welcome the work of Ruhnke and Doukas as an important "call to action" for academic medicine to actively, and intentionally, strengthen the culture of medical school and training programs to value integrity and to respect the need for examinations to demonstrate competence throughout a professional career.

In its legal actions and information campaign related to the board review prep company transgressions, "ABIM conveyed a clear message to the physician community that ABIM will not tolerate unethical behavior from board candidates, that test takers need to know that this kind of 'brain dumping' is grossly unethical, and that any physician who seeks to compromise the integrity of the ABIM examination process will face swift and serious consequences," explains Cassel.

"The certifying examination is one of the first tests of professionalism for physicians. 'Everyone does it' is never a sufficient answer when faced with an ethical dilemma, and if the profession is to meet its societal obligation to uphold the highest ethical standards, we most certainly cannot accept such an excuse from board certified physicians," she concludes.

Source-Eurekalert

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Study Sheds Light on Why Pregnancy Provides Protection Against Breast Cancer

Medindia Health News
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Study Sheds Light on Why Pregnancy Provides Protection Against Breast Cancer
Apr 30th 2013, 17:25

A new study on a group of mice published in the journal Breast Cancer Research reveals that the lowering of Wnt/Notch signaling ratio in the breast tissue among those which have given birth could be one of the reasons why being pregnant while young provides some sort of protection against breast cancer.

Early pregnancy is protective against breast cancer in humans and in rodents. In humans having a child before the age of 20 decreases risk of breast cancer by half. Using microarray analysis researchers from Basel discovered that genes involved in the immune system and differentiation were up-regulated after pregnancy while the activity of genes coding for growth factors was reduced.

The activity of one particular gene Wnt4 was also down-regulated after pregnancy. The protein from this gene (Wnt4) is a feminising protein - absence of this protein propels a foetus towards developing as a boy. Wnt and Notch are opposing components of a system which controls cellular fate within an organism and when the team looked at Notch they found that genes regulated by notch were up-regulated, Notch-stimulating proteins up-regulated and Notch-inhibiting proteins down-regulated.

Wnt/Notch signalling ratio was permanently altered in the basal stem/progenitor cells of mammary tissue of mice by pregnancy. Mohamed Bentires-Alj from the Friedrich Miescher Institute for Biomedical Research, who led this study explained, "The down-regulation of Wnt is the opposite of that seen in many cancers, and this tightened control of Wnt/Notch after pregnancy may be preventing the runaway growth present in cancer."

Source-Eurekalert

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