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MAY 2019 I DESIGN007 MAGAZINE 9 We also have an interview with Dave Wiens and Mike Santarini of Mentor, a Siemens Busi- ness, who explain how design rules are part of the "shift left" movement to enable more deci- sion-making earlier in the design process, and why PCB designers of today must have cross- domain awareness to succeed. Columnist Tim Haag explores the need for design rules and knowing when it's okay to break them. Then, columnist and author Mark Thompson high- lights some of the challenges related to setting design rules for tight tolerances, and why ne- gotiation is sometimes needed. We also have columns from our regular con- tributors, including Bob Tise of Sunstone Cir- cuits, Jade Bridges of Electrolube, and Stephen Chavez representing the IPC Designers Coun- cil. Further, we have a great article by Linda Mazzitelli of PTC that investigates the ongoing convergence of ECAD and MCAD technology. It's a great time to be in this industry. See you next month! DESIGN007 Andy Shaughnessy is managing editor of Design007 Magazine. He has been covering PCB design for 19 years. He can be reached by clicking here. problem. But that may not work for our seg- ment with thousands of PCB fabricators world- wide. So, we asked our expert contributors to dis- cuss possible paths forward regarding design rules. First, we have a wide-ranging inter- view with Mike Creeden of San Diego PCB and Freedom CAD's Scott McCurdy, Jay Car- bone, and Rich Kluever who discuss design rules from the perspectives of designers and fabricators as well as the need for a univer- sal design data input. Next, we have a short excerpt from the new I-007eBook written by Scott Miller from Freedom CAD titled The Printed Circuit Designer's Guide to… Execut- ing Complex PCBs, which focuses on using design rules. Then, columnist Barry Olney weighs in with a feature on high-speed design constraints, ex- plaining how to set design rules based on pre- layout simulation, and how IPC's guidelines can go a long way toward helping designers set constraints. In an interview, Altium's Craig Ar- curi follows up with a look at design rules from his vantage point of running both design and manufacturing companies, and why this in- dustry, especially design software, must evolve sooner rather than later. Lithium-air batteries, which currently are still in the experimental stages of development, are poised to be- come the next revolutionary replacement for currently used lithium-ion batteries that power electric vehicles, cellphones, and computers. Lithium-air batteries can store 10 times more energy than lithium-ion batteries and are much lighter. Howev- er, lithium-air batteries could be even more efficient and provide more charge with the incorporation of advanced catalysts made from two-dimensional materials. "We are going to need very high-energy density batteries to pow- er new advanced technologies that are incorporated into phones, laptops, and especially electric vehicles," said Amin Salehi-Khojin, associate professor of mechanical and industrial engineering in the University of Illinois at Chicago's (UIC's) College of Engineering. One of the reasons the 2D TDMCs performed so well is because they help speed both charging and discharg- ing reactions occurring in lithium-air batteries. They also synergize with the electrolyte. Poya Yasaei, Zahra Hemmat, Pedram Abbasi, Shadi Fu- ladi, Xuan Hu, Robert Klie, Fatemeh Khalili-Araghi, and Baharak Sayahpour of UIC and Robert Warburton and Jeffrey Greeley of Purdue University are co-authors on the paper. (Source: UIC) 2D Materials May Enable Electric Vehicles to Get 500 Miles on a Single Charge

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