Kaberi Gayen

Kaberi Gayen (Bengali: কাবেরী গায়েন, also spelt Kaberi Gain; born 1 January 1970) is a prominent Bengali academic, author, and social activist known for her outspoken views on the oppression of minorities and gender inequality in Bangladesh.

She is a professor of the Department of Mass Communication and Journalism at the University of Dhaka, as well as a visiting lecturer at Edinburgh Napier University, United Kingdom.

Early life

Gayen was born in a Bengali Brahmin family from Barisal, Bangladesh. She did her schooling from Barisal Government Women's College, and travelled to Dhaka in 1989 to obtain an honours degree in mass communication and journalism from the University of Dhaka - for which she was awarded the Dil Noshin Khanam Gold Medal. She then completed her master's from the same university in 1990, thereafter travelling to Edinburgh to obtain a PhD from Edinburgh Napier University in 2004. Her thesis was on Modelling the Influence of Communications on Fertility Behaviour of Women in Rural Bangladesh.

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Gain

Gain may refer to:

Increase of quantity

Gain (electronics), an electronics and signal processing term

Antenna gain

Gain (accounting)

Gain (laser), derivative of the logarithm of power with respect to length of propagation

Information gain in decision trees, in mathematics and computer science

People

Gain (surname), an Indian surname

Gain (singer), a South Korean singer, actress, and entertainer

Products

Gain (detergent)

Music

Gain (EP), an EP by Sadie

Acronyms

GAIN, Generating Antibiotic Incentives Now a title of the FDA Safety and Innovation Act

Global Alliance for Improved Nutrition (GAIN), a Swiss Foundation working in the field of malnutrition

Global Appraisal of Individual Needs, an evidence-based addiction and mental health assessment

Greater Avenues to Independence program, a precursor to the CalWORKs welfare program

Other uses

Gain (projection screens)

Gain Capital, a US-based forex trading company

Gain (novel), a novel by American author Richard Powers

GAIN domain, protein domain

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Gain (singer)

Ga-In (hangul: 가인) (born Son Ga-In (hangul: 손가인), September 20, 1987) is a South Korean singer, actress, and entertainer. She is best known as a member of the Korean pop music girl-group Brown Eyed Girls and for her appearances alongside Jo Kwon from 2AM for TV shows We Got Married and All My Love. As a solo artist she has released five EPs.

Music career

2005-09: Brown Eyed Girls & solo projects

Son Ga-In was noticed by the existing members of Brown Eyed Girls after she was eliminated during auditions for the popular South Korean reality series Let's Coke Play! Battle Shinhwa! She was approached by composer Ahn Jung Hoon and invited to audition at Brown Eyed Girls' company, eventually joining the group. The four members performed several small shows before officially debuting as Brown Eyed Girls in 2006. In the same year, she performed a duet "Must Have Love" with SG Wannabe's leader Kim Yong Jun, which became her first number one hit during the Christmas season.

Despite having initial successes, it was not until 2009 that her home group made a breakthrough into Korean mainstream with their hit song "Abracadabra", which was notable for the group's shift of their image and their new direction. After the unexpected success of the song, the group went on to become one of the most mentioned names of K-Pop girl-groups.

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Gain (laser)

In laser physics, gain or amplification is a process where the medium transfers part of its energy to the emitted electromagnetic radiation, resulting in an increase in optical power. This is the basic principle of all lasers. Quantitatively, gain is a measure of the ability of a laser medium to increase optical power.

Definition

The gain can be defined as the derivative of logarithm of power $~P~$ as it passes through the medium:

where $~z~$ is the coordinate in the direction of propagation. This equation neglects the effects of the transversal profile of beam.

In the quasi-monochromatic paraxial approximation, the gain can be taken into account with the following equation

where $~\nu~$ is variation of index of refraction (Which is supposed to be small),

$~E~$ is complex field, related to the physical electric field $~E_{\rm phys}~$ with relation $~E_{\rm phys}={\rm Re}\left( \vec e E \exp(ikz-i\omega t)\right)~$ , where $~\vec e~$ is vector of polarization, $~k~$ is wavenumber, $~\omega~$ is frequency, $~\Delta_{\rm perp}=\left( \frac{\partial ^2}{\partial x^2}+ \frac{\partial ^2}{\partial y^2} \right) ~$ is transversal Laplacian; $~ \rm Re ~$ means real part.