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A better solution is to have two or more subsets of neural networks paired with simulators, and keep the GPUs and CPUs running at the same time updating networks or simulations from different sets depending on which step (neural network or simulation) is ready to be taken. This approach is the rightmost, “pipelined CPU+GPU” option shown in the following figure. With it, and the other improvements mentioned above, we were able to get the training time for ~4M parameter neural networks down to the number mentioned above (~4 hours on a single computer).

Our code enables everyone in the research community, including students and self-taught learners, to rapidly experimentally iterate on training deep neural networks on challenging problems like Atari, which heretofore has been a luxury limited to only well-funded industry and academic labs.

Faster code begets research advances. For example, our new code enabled us to launch an extensive hyperparameters search for the genetic algorithm at a fraction of the cost, which led to performance improvements on most Atari games over those we originally reported. We have updated our original arXiv publication with these new results. The faster code is also catalyzing all of our current research into improving deep neuroevolution by shortening our iteration times, enabling us to try each new idea on more domains and run the algorithms longer.

Our new software repository includes an implementation of our deep genetic algorithm, the evolution strategies algorithm from Salimans et al. , and our ( surprisingly competitive! ) random search control. We hope others will use our code to accelerate their own research activities. We also invite the community to build off our code to improve it. For example, further speedups are possible with distributed GPU training and with adding other TensorFlow operations customized for this type of computation.

There is a lot of momentum building around deep neuroevolution. In addition to our work and that by OpenAI mentioned above, there have also been recent deep learning advances using evolutionary algorithms from DeepMind , Google Brain , and Sentient . We hope open sourcing our code contributes to this momentum by making the field more accessible.

Most generally, our goal is to lower the cost of doing this research to the point where researchers of all backgrounds can try their own ideas for improving deep neuroevolution and harness it to accomplish their goals.

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Eight Ways to Build Collaborative Teams
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From the November 2007 Issue
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Executive Summary

Reprint: R0711F

Executing complex initiatives like acquisitions or an IT overhaul requires a breadth of knowledge that can be provided only by teams that are large, diverse, virtual, and composed of highly educated specialists. The irony is, those same characteristics have an alarming tendency to decrease collaboration on a team. What’s a company to do?

Gratton, a London Business School professor, and Erickson, president of the Concours Institute, studied 55 large teams and identified those with strong collaboration despite their complexity. Examining the team dynamics and environment at firms ranging from Royal Bank of Scotland to Nokia to Marriott, the authors isolated eight success factors: (1) that build bonds among the staff, in memorable ways that are particularly suited to a company’s business. (2) among executives, which help cooperation trickle down to the staff. (3) in which managers support employees by mentoring them daily, instead of a transactional “tit-for-tat culture.” (4) , such as communication and conflict resolution. (5) , which corporate HR can foster by sponsoring group activities. (6) , or leaders who are both task-oriented and relationship-oriented. (7) , by populating teams with members who know and trust one another. (8) , achieved by defining individual roles sharply but giving teams latitude on approach.

As teams have grown from a standard of 20 members to comprise 100 or more, team practices that once worked well no longer apply. The new complexity of teams requires companies to increase their capacity for collaboration, by making long-term investments that build relationships and trust, and smart near-term decisions about how teams are formed and run.

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To execute major initiatives in your organization—integrating a newly acquired firm, overhauling an IT system—you need complex teams. Such teams’ defining characteristics—large, virtual, diverse, and specialized—are crucial for handling daunting projects. Yet these very characteristics can also destroy team members’ ability to work together, say Gratton and Erickson. For instance, as team size grows, collaboration diminishes.

To maximize your complex teams’ effectiveness, construct a basis for collaboration in your company. Eight practices hinging on relationship building and cultural change can help. For example, create a strong sense of community by sponsoring events and activities that bring people together and help them get to know one another. And use informal mentoring and coaching to encourage employees to view interaction with leaders and colleagues as valuable.

When executives, HR professionals, and team leaders all pitch in to apply these practices, complex teams hit the ground running—the day they’re formed.

The Idea in Practice

The authors recommend these practices for encouraging collaboration in complex teams:

What Executives Can Do


Royal Bank of Scotland’s CEO commissioned new headquarters built around an indoor atrium and featuring a “Main Street” with shops, picnic spaces, and a leisure club. The design encourages employees to rub shoulders daily, which fuels collaboration in RBS’s complex teams.


At Standard Chartered Bank, top executives frequently fill in for one another, whether leading regional celebrations, representing SCB at key external events, or initiating internal dialogues with employees. They make their collaborative behavior visible through extensive travel and photos of leaders from varied sites working together.


At Nokia, each new hire’s manager lists everyone in the organization the newcomer should meet, suggests topics he or she should discuss with each person on the list, and explains why establishing each of these relationships is important.

What HR Can Do


Marriott has recognized the anniversary of the company’s first hotel opening by rolling back the cafeteria to the 1950s and sponsoring a team twist dance contest.

What Team Leaders Can Do


When Nokia needs to transfer skills across business functions or units, it moves entire small teams intact instead of reshuffling individual people into new positions.

When tackling a major initiative like an acquisition or an overhaul of IT systems, companies rely on large, diverse teams of highly educated specialists to get the job done. These teams often are convened quickly to meet an urgent need and work together virtually, collaborating online and sometimes over long distances.

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approved an all-electronic Compatible color system developed by , which encoded the color information separately from the brightness information and greatly reduced the resolution of the color information in order to conserve bandwidth. The brightness image remained compatible with existing black-and-white television sets at slightly reduced resolution, while color televisions could decode the extra information in the signal and produce a limited-resolution color display. The higher resolution black-and-white and lower resolution color images combine in the brain to produce a seemingly high-resolution color image. The NTSC standard represented a major technical achievement.

Color bars used in a test pattern , sometimes used when no program material is available.

Although all-electronic color was introduced in the U.S. in 1953, Statement Clutch Circle of Peace by VIDA VIDA T3igbDJjsZ
high prices, and the scarcity of color programming, greatly slowed its acceptance in the marketplace. The first national color broadcast (the 1954 Sheer Wrap Bring the Fire by VIDA VIDA NlBThKd
) occurred on 1 January 1954, but during the following ten years most network broadcasts, and nearly all local programming, continued to be in black-and-white. It was not until the mid-1960s that color sets started selling in large numbers, due in part to the color transition of 1965 in which it was announced that over half of all network prime-time programming would be broadcast in color that fall. The first all-color prime-time season came just one year later. In 1972, the last holdout among daytime network programs converted to color, resulting in the first completely all-color network season.

Early color sets were either floor-standing console models or tabletop versions nearly as bulky and heavy; so in practice they remained firmly anchored in one place. The introduction of 's relatively compact and lightweight Porta-Color set in the spring of 1966 made watching color television a more flexible and convenient proposition. In 1972, sales of color sets finally surpassed sales of black-and-white sets. Color broadcasting in Europe was not standardized on the format until the 1960s, and broadcasts did not start until 1967. By this point many of the technical problems in the early sets had been worked out, and the spread of color sets in Europe was fairly rapid. By the mid-1970s, the only stations broadcasting in black-and-white were a few high-numbered UHF stations in small markets, and a handful of low-power repeater stations in even smaller markets such as vacation spots. By 1979, even the last of these had converted to color and, by the early 1980s, BW sets had been pushed into niche markets, notably low-power uses, small portable sets, or for use as Embroidered Satin Clutch Mustard Sanayi 313 eUz3cn
screens in lower-cost consumer equipment. By the late 1980s even these areas switched to color sets.

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