Why do humans cooperate in things as diverse as environment conservation or the creation of fairer societies, even when they don’t receive anything in exchange or, worst, they might even be penalized? This is a question that has puzzled academics for centuries, especially since in evolution the basis for the “survival of the fittest” is, after all, selfishness.

But in an article just published in the journal Nature, three Portuguese theoretical physicists developed a mathematical model capable of providing a way out from this conundrum through the introduction of social diversity - a ubiquitous characteristic of modern social networks - and suggesting that that the act of cooperation may depend on one’s social context/ranking. And in fact, when social diversity was taken into account the numbers of those cooperating increased in direct relation to the system diversity.

NEW ORLEANS, July 18 /PRNewswire/ --

Angostura Limited announced today the beta release of Myspeedrail.com, an online community and resource for bartenders around the globe. The announcement was made at Tales of the Cocktail, a culinary and cocktail festival.

Angostura partnered with Fusework Studios to develop Myspeedrail.com. The project was born out of professional bartenders' collective interest in sharing ideas, staying connected to what's hot in the world of cocktails, and growing their craft.

Myspeedrail.com is now in an invitation-only beta launch, where its applications are being tested by a diverse group of bartenders. The site will boast a variety of dynamic web 2.0 tools geared toward the professional bartender.

BUFFALO GROVE, Illinois, July 18 /PRNewswire/ --

Eagle Test Systems, Inc. (Nasdaq: EGLT) announced today that Jiangsu Changjiang Electronics Technology Co., Ltd., (Shanghai Stock Exchange Share Code: 600584) a global provider of semiconductor assembly and test services and leading subcontract manufacturer throughout China, has purchased multiple Eagle ETS-200 and ETS-364 Analog and Mixed Signal testers for its new production facility in Jiangyin, China, located approximately 150Km West of Shanghai.

The recent purchase increases Jiangsu's installed base of Eagle Test Systems' platforms and provides expanded test capability covering the wide range of products that JCET's current and new customers require.

LONDON, July 18 /PRNewswire/ -- Urea prices reached record highs in June 2008, increasing the pressure on the AdBlue market's already tight margins. When combined with the additional pressure from the soaring price of automotive diesel, and growing doubts over the health of the commercial vehicles market, it would appear AdBlue suppliers are heading for tougher conditions in Q3 2008.

LONDON, July 18 /PRNewswire/ --

- ATTN: North West Media

LONDON, July 18 /PRNewswire/ --

Members of Unite working at Arrowe Park and Clatterbridge Hospitals have voted overwhelmingly by 93% for industrial action after the Trust imposed changes from weekly to monthly pay.

Unite members at Arrowe Park and Clatterbridge Hospitals are planning industrial action from 7.30 am on Monday 21st July including an overtime ban, withdrawal of good will, a ban on call out, no lone working, and a strict enforcement of health and safety procedures. In addition there will be discontinuous strike action commencing at 7.30 am on Friday 25th July until midnight on Saturday 26th July.

CALGARY, Canada, July 18 /PRNewswire/ --

- RVX-208 is the Only Apo-Al/HDL Drug to be Highlighted

Resverlogix Corp. ("Resverlogix" or the "Company") (TSX:RVX) is pleased to announce that Resverlogix's lead drug is featured prominently in an article titled "Emerging Antidyslipidemic Drugs", which appears in the current edition of Expert Opinion of Emerging Drugs, a well respected scientific journal for the pharmaceutical industry. The article written by Drs.' Pollex, Joy and Hegele provides an overview of current and upcoming dyslipidemic drugs.

MORRIS TOWNSHIP, New Jersey, July 18 /PRNewswire/ --

- Company Raises 2008 EPS Guidance to US$3.75 - 3.85

Living on a desert island may not even be a mode of escape from Lyme disease because birds can also be a carrier of infected ticks. Dorothy Leland, who is an advocate with the California Lyme Disease Association and has a daughter with the disease used to love the outdoors a lot more. Since her daughter contracted Lyme over three years ago Leland has taken a different perspective on life in the great outdoors.

Ticks that carry the Lyme disease infection, which causes a rash that looks similar to Saturn rings, is a very complex disease to spot, prevent, and cure. Lyme disease associations like lymedisease.org that Leland is a part of aid in the education and prevention of Lyme. Leland says there are three main things one should remember when setting out for an expedition in nature: Be aware, choose spots carefully, and wear repellant.

SEATTLE, July 18 /PRNewswire/ --

- WatchGuard Worldwide UTM Shipment Growth Leads Entire Industry with Record Setting Pace of 190 Percent for 2007; Leads with 196 Percent UTM Shipment Growth for Western Europe

WatchGuard(R) Technologies, a global leader in extensible network security and connectivity solutions, today announced that it has been confirmed as the worldwide leader of unified threat management (UTM) shipment growth for 2007, leading the industry with a whopping 190.2 percent rate of growth. Additionally, the company was crowned as the leading UTM shipment growth leader for Western Europe, where WatchGuard led the region with 196.4 percent growth.

N. BILLERICA, Massachusetts, July 18 /PRNewswire/ --

- Mechanism of Action of Metformin on Insulin Sensitization Poster Wins One of Three Prizes

Seahorse Bioscience, Inc., leaders in real-time measurement of cellular bioenergetics announced today the receipt of The European Association for the Study of Obesity (EASO) poster award at the 16th European Congress on Obesity (ECO 2008) May 14-17, 2008 in Geneva, Switzerland.