Dolphins have a clever trick for overcoming sleep deprivation, according to Sam Ridgway from the US Navy Marine Mammal Program and colleagues.   They are able to send half of their brains to sleep while the other half remains conscious. What is more, the mammals seem to be able to remain continually vigilant for sounds for days on end.

Does the dolphins' unrelenting auditory vigilance tire them and take a toll on the animals' other senses? Ridgway and his team set about testing two dolphins' acoustic and visual vigilance over a 5 day period to find out how well they functioned after days without a break.

LUXEMBOURG, April 30 /PRNewswire/ --

Alternative Petroleum Technologies S. A. (APT) announced today that its shares of common stock have been listed on the Frankfurt Stock Exchange (FSE) under the symbol WRR. We believe that the listing on the FSE, along with our global expansion, will provide more recognition for Alternative Petroleum Technologies and its exciting developments with its partners and the investment community, stated Mr. Patrick Grimes, President of APT. We are extremely pleased with the listing of our shares on the FSE as it completes an important step in APT's strategic growth plan.

About Alternative Petroleum Technologies (www.altpetrol.com)

PALO ALTO, California, April 30 /PRNewswire/ --

- Accomplished regulatory executive enhances Nfocus device development team.

Endovascular device start-up Nfocus Neuromedical Inc. announced today the appointment of accomplished regulatory executive Robert O'Holla to its leadership team in the role of Vice President of Regulatory Affairs.

PALO ALTO, California, April 30 /PRNewswire/ --

- Milledge brings proven experience, dynamic insights and strategic focus to neurovascular interventions developer.

Nfocus Neuromedical Inc. announced today that its directors elected Eric P. Milledge as Chairman of the Board. Mr. Milledge brings exceptional industry experience, business acumen and leadership to Nfocus, as we advance our pursuit of break-through technologies in the dynamic field of endovascular neurosurgery, noted President and CEO Martin S. Dieck.

AUDUBON, Pennsylvania, April 30 /PRNewswire/ --

Globus Medical, Inc., the largest privately held spinal implant manufacturer in the world, today announced the continuing expansion of its international operations and the appointment of Glenn Kenney to Senior Vice President of International and Corporate Programs. Globus has secured CE Marks for over 30 products across its broad portfolio, including six non-fusion products.

CARLSBAD, California, April 30 /PRNewswire/ --

- PREPARES FOR LAUNCH OF 'NEST-3' ACUTE ISCHEMIC STROKE CLINICAL TRIAL

PhotoThera, Inc., the developer of transcranial laser therapy (TLT) designed for the treatment of acute ischemic stroke within 24 hours of stroke onset, announced today that it has closed a US$50 million Series D round of financing led by Warburg Pincus, a leading global private equity firm, to fund a planned follow-on phase III 'NEST-3' (NeuroThera(R) Effectiveness and Safety Trial) clinical study. The Company previously announced that NEST-3 would build upon the results of its NEST-2 trial, which revealed a statistically significant treatment effect for patients with moderate to moderately severe ischemic strokes using a post-hoc data analysis.

Kidding, Fresh Kokanee: The Pathways of Salmon just seemed so bland. Just testing out a wee hypothesis. Human with an opposable thumb and all that? Still reading this? Good.

Thanks for that commercial break. And now back to Kokanee.

ALLEROED, Denmark, April 30 /PRNewswire/ --

- Completed-Scans-Per-Hour Specification Exemplifies Best-in-Class

Contex - the world's leading wide format scanner manufacturer -announced today the inclusion of a new standard for measuring the productivity of its Contex and Vidar award-winning scanners. This new standard measures productivity by number of completed scans in a specified period of time. While inches-per-second is still the accepted standard for large format scanners, many scanner users appreciate a more practical measurement regarding the scanner's productivity. Contex's completed-scans-per-hour provides a more accurate representation of scanner speed and productivity.

(Logo: http://www.newscom.com/cgi-bin/prnh/20090430/345466 )

BIRMINGHAM, England, April 30 /PRNewswire/ --

Providing an international panel of speakers, the IFSEC Conference hosts timely debate and provides practical solutions to the most critical challenges facing security professionals in uncertain times.

Taking place alongside the annual IFSEC exhibition at the NEC in Birmingham on 11-13 May, the modular conference provides 9 bundles of information, helping delegates to focus on their specific interest areas.

SANTA CLARA, California, April 30 /PRNewswire/ --

- EDN Hosting 'Designing with LEDs Workshop 2009' in Santa Clara

California Micro Devices (Nasdaq: CAMD) will be showcasing its innovative LuxGuard(TM) family of total turnkey solutions for ESD (electrostatic discharge) protection and thermal management for high power, ultra high brightness LED (light emitting diode) lighting applications at EDN's Designing with LEDs Workshop 2009 in Santa Clara, California, on April 30. A pioneer in the development of ESD protection circuits for high power ultra high brightness (UHB) LED applications, CMD has shipped more than 300 million units to customers since 2001.

LuxGuard Protection for UHB LEDs