Controlling Deliberation with the Success Probability in a Dynamic Environment

AAAI Conferences

Seiji Yamada Interdisciplinary Graduate School of Science and Engineering Tokyo Institute of Technology 4259 Nagatsuda, Midori-ku, Yokohama, Kanagawa 226, JAPAN Email: yamada ai.sanken.osaka-u.ac.j p Abstract This paper describes a novel method to interleave planning with execution in a dynamic environment. Though, in such planning, it is very important to control deliberation: to determine the timing for interleaving them, few research has been done. To cope with this problem, we propose a method to determine the interleave timing with the success probability, SP, that a plan will be successfully executed in an environment. We also developed a method to compute it efficiently with Bayesian networks and implemented SZ system. The system stops planning when the locally optimal plan's SP falls below an execution threshold, and executes the plan. Since SP depends on dynamics of an environment, a system does reactive behavior in a very dynamic environment, and becomes deliberative in a static one. We made experiments in Tileworld by changing dynamics and observation costs. As a result, we found the optimal threshold between reactivity and deliberation in some problem classes. Furthermore we found out the optimal threshold is robust against the change of dynamics and observation cost, and one of the classes in which S2"P works well is that the dynamics itself changes.


U.S. deploys Guam-based high-altitude surveillance drone to Yokota base

The Japan Times

An RQ-4 Global Hawk surveillance drone arrived at Yokota Air Base Monday night, starting a five-month operation in Tokyo, the U.S. base announced. A Defense Ministry source said that the aircraft could be used to conduct surveillance of North Korea, over which political tensions have been ratcheted up over the past month. The aircraft is part of the 69th Reconnaissance Group Detachment 1 and provides near real-time aerial imagery reconnaissance support to U.S. and partner nations, according to the base's website. The aircraft was flown from its home at Andersen Air Force Base, Guam, to avoid typhoons there, the Stars and Stripes quoted Detachment 1 commander Col. Jeremy Fields as saying. The drones and members of the detachment normally travel from their Guam home base to operate out of Misawa Air Base in Aomori Prefecture during the summer to avoid typhoons, but that wasn't possible last year or this year because of renovations to the runway at Misawa, the paper quoted Fields as saying.


HAL-5: The exoskeleton robot 'to suit you'

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On March 8 and 9, 2011, just days before the largest earthquake in its recorded history literally moved Japan 8 feet, the country played host to the inaugural International Forum on Cybernics 2011 in Tokyo. While calling the event groundbreaking might qualify as crass, researchers showcased some truly innovative ideas in the world of cybernics, an emerging field that Japan's University of Tsukuba Cybernics department describes as the "fusion of human, machine and information systems." The word itself is a fusion of cybernetics, mechatronics, and informatics. One of those ideas, the HAL-5 exoskeleton robotics suit by Tokyo-based company Cyberdyne, is a wearable device that helps ordinary people accomplish extraordinary feats, such as lifting objects they otherwise couldn't. Think of the improvements possible for caregivers, people with missing or paralyzed limbs, the elderly who want to continue living independently, factory workers, etc. "We'd like to use the same technology to support both care-giving and heavy duties in factories," says robotics pioneer Yoshiyuki Sankai of Cybernics.


Apple Possibly Looking to Japanese Expertise to Improve Siri

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Apple CEO Tim Cook hinted that Japan has a big part to play in the company's ongoing development of AI, as he continued his travels around the country via bullet train on Monday. Speaking to Nikkei Asian Review, Cook revealed that Apple's new advanced R&D center in Yokohama, currently scheduled for completion in December, would focus on "deep engineering" and would be "very different" from the R&D base Apple is building in China, without giving away specifics. Photo via Tim Cook However, Cook intimated that one of its main focuses would be on developing Apple's artificial intelligence services – which recently drew some criticism in the press – and emphasized that the company wanted to leverage specifically Japanese expertise in the field. "AI is horizontal in nature, running across all products, and is used in ways that most people don't even think about," said Cook. "We want the AI to increase your battery life, to recommend music to Apple Music subscribers... [to] help you remember where you parked your car."Japan's robotics heritage is legendary, coming on the back of years of successfully building industrial robots, however the state of its AI research remains ambiguous, given its relative lack of investment in deep learning from large amounts of analyzed data, which U.S. companies like Facebook and Google are already heavily researching. To improve on this front, Japan has just opened a Center for Advanced Integrated Intelligence Research in Tokyo (RIKEN), which specifically aims to develop systems of AI that will be able to solve problems using "Big Data".


Yamato and DeNA test autonomous delivery system in Japan

The Japan Times

On Tuesday, Yamato Transport Co. and DeNA Co. tested an autonomous vehicle delivery service to gauge the potential of self-driving technology in the field of logistics. The two Tokyo-based companies conducted the experiment in Fujisawa, Kanagawa Prefecture, in which an electric car navigated through a short, quarantined road without anyone sitting in the driver's seat. A person sat in the front passenger seat to observe the operation. During one demonstration, the vehicle, equipped with a camera and infrared sensor, ran through the residential area at 5 to 10 kph. When the delivery car arrived at its destination, a customer opened up a box inside the vehicle, allowed a QR code on her smartphone to be scanned, and picked up the product.