Thursday, April 25, 2013

Bollywood singer Shamshad Begum dies aged 94

MUMBAI (Reuters) - Indian singer Shamshad Begum, whose lilting voice charmed fans of Bollywood films for more than 60 years, has died at the age of 94.

The singer's daughter Usha Ratra told local media that Begum died in Mumbai on Tuesday after a period of declining health.

"The golden voice of Shamshad Begum, play back singer of great eminence in some of the most historic film songs .. now silent .. RIP," Bollywood actor Amitabh Bachchan said on Twitter on Wednesday.

Begum was born in Amritsar, Punjab, and started her career on radio in 1947 before singing for the movies.

Her most memorable songs include "Mere Piya Gaye Rangoon" from the 1949 film "Patanga" and "Leke Pehla Pehla Pyar" from the 1956 hit "C.I.D.".

"Teri Mehfil Mein Qismat", her duet with Indian's most famous most famous playback singer Lata Mangeshkar in the 1960 blockbuster "Mughal-E-Azam", is still often played on Indian radio.

"I am saddened to hear of the death of Shamshad Begum. I have sung with her in several films and she had a pleasant and simple personality," Mangeshkar wrote on Twitter.

Begum received the Padma Bhushan, one of India's highest civilian awards, in 2009.

(Reporting by Shilpa Jamkhandikar and Diksha Madhok; Editing by Tony Tharakan and Belinda Goldsmith)

Source: http://news.yahoo.com/bollywood-singer-shamshad-begum-dies-aged-94-130428886.html

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Troubling patterns of teacher assignments within schools

Apr. 23, 2013 ? Even within the same school, lower-achieving students often are taught by less-experienced teachers, as well as by teachers who received their degrees from less-competitive colleges, according to a new study by researchers from the Stanford Graduate School of Education and the World Bank. The study, using data from one of the nation's largest school districts, also shows that student class assignments vary within schools by a teacher's gender and race.

In a paper published in the April issue of Sociology of Education, the researchers present the results of a comprehensive analysis of teacher assignments in the nation's fourth-largest school district, Miami-Dade County Public Schools. Their findings identify trends that may contribute to teacher turnover and achievement gaps nationwide.

Previous research indicates that high-quality teachers can significantly improve education outcomes for students. However, not all students have equal access to the best teachers.

"It is well-known that teachers systematically sort across schools, disadvantaging low-income, minority, and low-achieving students," said Demetra Kalogrides, a research associate at the Graduate School of Education's Center for Education Policy Analysis and one of the study's three authors. "Our findings are novel because they address the assignment of teachers to classes within schools. We cannot assume that teacher sorting stops at the school doors."

The authors note that more research needs to be done to see whether such patterns exist within schools across the country.

The assignment of teachers to students is the result of a complex process, involving school leaders, teachers, and parents. While principals are constrained by teachers' qualifications -- not all high school teachers, for instance, can teach physics -- they also may use their authority to reward certain teachers with the more desirable assignments or to appease teachers who are instrumental to school operations.

Teachers with more power, due to experience or other factors, may be able to choose their preferred classes. Parents, particularly those with more resources, also may try to intervene in the process to ensure that their children are taught by certain teachers.

"We wanted to understand which teachers are teaching which students," said Susanna Loeb, a Stanford professor of education, the director of the Center for Education Policy Analysis, and an author of the study. "In particular, are low-achieving students more likely to be assigned to certain teachers, and if so, why?"

Using extensive data from Miami-Dade, the authors compared the average achievement of teachers' students in the year before the students were assigned to them. They discovered that certain teachers -- those with less experience, those from less-competitive colleges, female teachers, and black and Hispanic teachers -- are more likely to work with lower-achieving students than are other teachers in the same school.

They found these patterns at both the elementary and middle/high school levels.

According to the researchers, teachers who have been at a school for a long time may be able to influence the assignment process in order to secure their preferred classes -- for instance, classes with higher-achieving students. The study found that teachers with 10 or more years of experience, as well as teachers who have held leadership positions, are assigned higher-achieving students on average.

Assigning lower-achieving students to inexperienced teachers could have significant repercussions. According to the researchers, it could increase turnover among new teachers, since novice teachers are more likely to quit when assigned more low-achieving students.

In addition, it could exacerbate within-school achievement gaps -- for example, the black-white gap. Since they are lower-achieving on average, minority and poor students are often assigned to less-experienced teachers than white and non-poor students. Less-experienced teachers tend to be less effective, so this pattern is likely to reinforce the relationships between race and achievement and poverty and achievement, the researchers said.

The study also found that lower-achieving students are taught by the teachers who graduated from less-competitive colleges, based on test scores for admission and acceptance rates. This trend is particularly evident at the middle school and high school levels, possibly due to the more varied demands of middle and high school courses. Teachers from more competitive colleges may have deeper subject knowledge than their colleagues from less-competitive colleges, leading principals to assign them to more advanced courses, the researchers said.

The researchers noted that assignment patterns vary across schools. Experienced teachers appear to have more power over the assignment process when there are more of them in a school; senior teachers are assigned even higher-achieving students when there is a larger contingent of experienced teachers in the school.

At the same time, schools under more accountability pressure are less likely to assign higher-achieving students to more-experienced teachers than schools that are not under accountability pressure.

Finally, according to the findings, class assignments vary depending on a teacher's gender and race. Since female teachers are more likely to teach special education than male teachers, on average they work with lower-achieving students than their male colleagues. Also, black and Hispanic teachers, when compared with white teachers in the same schools, work with more minority and poor students, who tend to be lower-achieving.

Unlike sorting based on experience, the authors said that teacher-student matching based on race could improve student achievement because previous research suggests that minority students may learn more when taught by minority teachers.

"Our analyses are a first step in describing within-school class assignments, an important, yet often overlooked, form of teacher sorting," said Kalogrides.

The other co-author is Tara B?teille of the World Bank. The research was supported by a grant from the Institute of Education Sciences.

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The above story is reprinted from materials provided by American Sociological Association, via Newswise.

Note: Materials may be edited for content and length. For further information, please contact the source cited above.


Journal Reference:

  1. D. Kalogrides, S. Loeb, T. Beteille. Systematic Sorting: Teacher Characteristics and Class Assignments. Sociology of Education, 2012; 86 (2): 103 DOI: 10.1177/0038040712456555

Note: If no author is given, the source is cited instead.

Disclaimer: This article is not intended to provide medical advice, diagnosis or treatment. Views expressed here do not necessarily reflect those of ScienceDaily or its staff.

Source: http://feeds.sciencedaily.com/~r/sciencedaily/most_popular/~3/LKRtmDpAk4A/130423135724.htm

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Can the friend of my friend be my enemy?

Tuesday, April 23, 2013

Just as humans can follow complex social situations in deciding who to befriend or to abandon, it turns out that animals use the same level of sophistication in judging social configurations, according to a new study that advances our understanding of the structure of animal social networks.

The study, which appears today in the journal Animal Behaviour, is the first in which researchers applied a long-standing theory in social psychology called "structural balance," which is used to analyze human relationships, to an animal population to better understand the mechanisms that determine the structure of animal social groups. Researchers analyzed social bonds in behavioral data from a long-term study of the rock hyrax, a small mammal that lives in colonies across Africa and the Middle East.

Structural balance theory considers the positive or negative ties between three individuals, or triads, and suggests that "the friend of my enemy is my enemy" triangle is more stable and should be more common than "the friend of my friend is my enemy" triangle. Another configuration, "the friend of my friend is my friend," is considered to also be a stable configuration in the social network. The last possible triangle, "the enemy of my enemy is my enemy," presages an unstable state, according to the theory.

The potential power of structural balance theory is its ability to predict patterns in the structure of the whole social network and also predict changes that occur over time, as unstable triads are expected to change to stable ones.

"We all live in social networks of some kind, either online or offline, and we are interested in understanding how these groups form and dissolve and their internal dynamics, but while studying these human dynamics is important, it's also very difficult and in many cases impractical. So we study how sociality evolved in animals, which might offer us some insights into our own social behavior. And indeed, the structural balance theory that was developed to study human behavior appears to be relevant in animals as well," said the study's lead author Amiyaal Ilany, a postdoctoral fellow at the National Institute for Mathematical and Biological Synthesis.

In the study, the hyraxes tended to form balanced triads and changed unbalanced triads to balanced triads over time. However, new individuals in the population ? new pups or males that migrate into the network ? introduced social instability by often forming unbalanced triads, causing the network as a whole to retain some level of instability. The study also found that contrary to classical structural balance theory, the "enemy of my enemy is my enemy" configuration was actually a stable configuration. The results suggest that structural balance may play a role in the evolution of social structures by selecting against specific configurations. Structural balance may also serve as a psychological mechanism that allows specific social structures to exist and that prevents cooperation between members of different groups.

The authors suggest that structural balance may be prevalent in other species as well.

"The results indicated that changes in social relationships are dependent not only on two individuals, but significantly on third parties, which underscores the importance of structural balance theory in explaining the evolution of complex natural social systems," Ilany said, who was a doctoral student at Tel Aviv University when the research was begun.

###

National Institute for Mathematical and Biological Synthesis (NIMBioS): http://www.nimbios.org/

Thanks to National Institute for Mathematical and Biological Synthesis (NIMBioS) for this article.

This press release was posted to serve as a topic for discussion. Please comment below. We try our best to only post press releases that are associated with peer reviewed scientific literature. Critical discussions of the research are appreciated. If you need help finding a link to the original article, please contact us on twitter or via e-mail.

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Source: http://www.labspaces.net/127867/Can_the_friend_of_my_friend_be_my_enemy_

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Qualcomm FQ2 2013 results: Record quarterly revenues of $6.1 billion

Qualcomm

173 million MSM chips shipped in the quarter; raising fiscal 2013 guidance

Qualcomm, which powers many of the gadgets we know and love, has just reported its Fiscal Second Quarter results. Here's your quick breakdown of the headline numbers for the quarter:

  • $6.12 billion in revenues for the quarter, up 24-percent year-over-year
  • $1.88 billion in operating income, up 24-percent y-o-y but down 10-percent q-o-q
  • $1.68 billion in net income, down 16-percent y-o-y
  • $2.22 billion in operating cash flow, up 17-percent y-o-y
  • 173 million MSM chips shipped in the quarter, up 14-percent y-o-y

This is overall a bit of a mixed bag for Qualcomm this quarter. While its revenues hit a record high, net income decreased year-over-year and most financial metrics dipped quarter-over-quarter. Some of this can be attributed to increased R&D (Research & Development), which jumped 27-percent from the year previous to $1.21 billion. Qualcomm says the increased R&D costs come from increased development time spent on CDMA-based 3G and OFDMA-based 4G LTE products.

Source: Qualcomm; PDF

    


Source: http://feedproxy.google.com/~r/androidcentral/~3/P3mruSR7ke8/story01.htm

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Wednesday, April 24, 2013

Boeing aims for mid-May restart of 787 deliveries

FILE - This Feb. 11, 2013 file photo shows a Boeing 787 flight test jet taxing following a test flight, at Boeing Field, in Seattle. Boeing's beleaguered 787 Dreamliners will be able to resume flights under an order expected to be issued Friday by the Federal Aviation Administration, although the root cause of battery failures on two of the planes is still unknown, according to congressional sources briefed by the agency. (AP Photo/Elaine Thompson, File)

FILE - This Feb. 11, 2013 file photo shows a Boeing 787 flight test jet taxing following a test flight, at Boeing Field, in Seattle. Boeing's beleaguered 787 Dreamliners will be able to resume flights under an order expected to be issued Friday by the Federal Aviation Administration, although the root cause of battery failures on two of the planes is still unknown, according to congressional sources briefed by the agency. (AP Photo/Elaine Thompson, File)

Boeing says it will begin delivering 787s again in early May.

The 787 has been grounded since mid-January because of smoldering batteries. Federal authorities have approved Boeing's redesigned battery system.

Boeing CEO Jim McNerney says the new battery setup has been installed on 10 787s that belong to airlines, and on nine more that have been built but not delivered.

He says "the bulk" of airline-owned 787s will get the battery fix by mid-May. Each installation takes about five days.

Boeing has kept producing the 787 even though it was grounded. But it can only collect the cash from airlines when it delivers the planes ? so restarting deliveries is important to the company.

Associated Press

Source: http://hosted2.ap.org/APDEFAULT/f70471f764144b2fab526d39972d37b3/Article_2013-04-24-Earns-Boeing/id-27f05ea9c11344f285f463574c1173a1

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Credit Suisse 1Q profit jumps to $1.37 billion

BASEL, Switzerland (AP) ? Swiss bank Credit Suisse Group has reported first quarter profits of 1.3 billion Swiss francs ($1.37 billion), a sharp rebound from the same period a year ago.

Switzerland's second-biggest bank credited "positive momentum" from a transformed business model for its jump in net profits attributable to shareholders during the first three months, up from 44 million francs in the first quarter of 2012 when it took big charges on debts and paid out higher bonuses.

The Zurich-based bank said Wednesday that results for the January-March period showed "high returns, strong client franchises, reduced cost base and lower risk-weighted assets."

Like its competitor, UBS AG, Switzerland's biggest bank, Credit Suisse has been reducing exposure to potentially-risky investment banking at a time when Europe's economy is challenged by a debt crisis.

Source: http://news.yahoo.com/credit-suisse-1q-profit-jumps-1-37-billion-060511805--finance.html

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Colbert Busch leads Sanford in South Carolina congressional race: poll (reuters)

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