Washington: Twitter CEO Dick Costolo reportedly got in a `tweet-brawl` when Indian-American technology entrepreneur and academic at Stanford`s Rock Center for Corporate Governance, Vivek Wadhwa criticized Twitter for being an `all-boys club` with lack of women in its top ranks.

Wadhwa noted that Twitter`s board and C-suite were all white and all male with the exception of General Counsel Vijaya Gadde, who joined the company only recently.

According to a news website, Costolo fired several tweets, calling Wadhwa as the `Carrot Top of academic sources` and that he had a propensity for silly hyperbole.

When another entrepreneur and technologist Anil Dash came to Wadhwa`s defence and criticized Costolo`s remarks over industry sexism, the CEO elaborated that fixing gender bias in the boardroom entails `more than checking a box and saying `we did it!`.

Wadhwa`s further tweeted that Twitter, being most visible companies in tech, should take the lead and fix the imbalance, and called it the Silicon Valley mafia further questioning the company`s plan to go public with its IPO without a single woman on the board.

The report said that Facebook was also famously criticized for its `frat house` culture and its COO Sheryl Sandberg further fueled the debate with her bestseller ` Lean In`, which urged women to `lean into` their careers rather than pull back when confronted with the demands of family and motherhood.

Washington: Noting that the US has not set up a new nuclear installation for decades, an Indian-American academic has accused President Barack Obama of hypocrisy in pushing India on a technology the US won't even touch.

"Why chain India to the past and risk another Chernobyl, Fukushima, or Bhopal when it could be leapfrogging into the future?" asked Vivek Wadhwa, Director of Research, CERC, Pratt School of Engineering, Duke University, in a column in the Washington Post.

The rate at which solar and other clean technologies are progressing, by the time the first nuclear plant is operational in India, it will be far more expensive than the alternatives, he said.

"The White House is claiming victory for a breakthrough in the impasse with India over nuclear energy," Wadhwa wrote suggesting "This is hardly a victory for the United States or for India.

"It no longer makes sense for any country to instal a technology that can create a catastrophe such as Chernobyl or Fukushima - especially when far better alternatives are available," he wrote.

In places such as Germany, Spain, Portugal, Australia and parts of the United States and India, residential-scale solar production has already reached "grid parity" with average residential electricity prices, he wrote

"In other words, it costs no more in the long term to instal solar panels than to buy electricity from utility companies - without government subsidies," Wadhwa wrote.

In the late 2020s, solar energy will cost a fraction of what fossil fuel - and nuclear-based alternatives do,' he predicted suggesting, "This is the reality - believe it or not."

Solar, wind, biomass, thermal, tidal, and waste-breakdown energy, and a host of newer energy technologies, are becoming increasingly practical to install worldwide, Wadhwa noted.

Obama, he suggested, "should not be prescribing medicine that he would not take himself.

Germany is working towards phasing out all of its nuclear plants by 2022 and many other developed countries are looking to follow its lead, he said.

"So why subject India and other developing countries to these dangers?" Wadhwa asked.

Instead of trying to chain India to the past with technologies such as nuclear, Obama should help the country leapfrog into the future with clean energy, he wrote.

"This will benefit not only India, but also the world."