Revolution by Design: The Materials Genome Initiative

By Jim Warren

The creation of a new material has long been either an accident or a matter of trial and error. Steel, for instance, was developed over hundreds of years by people who didn’t know why what they were doing worked (or didn’t work). Generations of blacksmiths observed that iron forged in charcoal was stronger than iron […]

The post Revolution by Design: The Materials Genome Initiative appeared first on NIST Taking Measure Blog.

…read more

Source:: http://nist-takingmeasure.blogs.govdelivery.com/revolution-design-materials-genome-initiative/

      

Posted in Featured Articles

The NIST Summer Institute for Middle School Science Teachers: An Educator’s Journey

By Laura Karns

I was always fascinated with science. However, I steered away from pursuing science beyond high school because there was too much math involved (and “MATH,” a four-letter word if ever I saw one, and I never really got along). As a result, much of my teaching experience has centered around things that came more naturally […]

The post The NIST Summer Institute for Middle School Science Teachers: An Educator’s Journey appeared first on NIST Taking Measure Blog.

…read more

Source:: https://nist-takingmeasure.blogs.govdelivery.com/nist-summer-institute-middle-school-science-teachers-educators-journey/

      

Posted in Featured Articles

The NIST Summer Institute for Middle School Science Teachers: An Educator’s Journey

By Laura Karns

I was always fascinated with science. However, I steered away from pursuing science beyond high school because there was too much math involved (and “MATH,” a four-letter word if ever I saw one, and I never really got along). As a result, much of my teaching experience has centered around things that came more naturally […]

The post The NIST Summer Institute for Middle School Science Teachers: An Educator’s Journey appeared first on NIST Taking Measure Blog.

…read more

Source:: http://nist-takingmeasure.blogs.govdelivery.com/nist-summer-institute-middle-school-science-teachers-educators-journey/

      

Posted in Featured Articles

Women’s Body Armor: Staying Ahead of the Curves

By Jennifer Huergo

As I peer into the cardboard box NIST researcher Amanda Forster holds out for me, I can’t help thinking that this mild-mannered materials scientist has an impressive collection of shivs. The handmade prison weapons include a ballpoint pen with a razor embedded in the shaft and a toothbrush — originally designed to be gentle on […]

The post Women’s Body Armor: Staying Ahead of the Curves appeared first on NIST Taking Measure Blog.

…read more

Source:: https://nist-takingmeasure.blogs.govdelivery.com/womens-body-armor-staying-ahead-curves/

      

Posted in Featured Articles

Women’s Body Armor: Staying Ahead of the Curves

By Jennifer Huergo

As I peer into the cardboard box NIST researcher Amanda Forster holds out for me, I can’t help thinking that this mild mannered materials scientist has an impressive collection of shivs. The handmade prison weapons include a ballpoint pen with a razor embedded in the shaft and a toothbrush — originally designed to be gentle […]

The post Women’s Body Armor: Staying Ahead of the Curves appeared first on NIST Taking Measure Blog.

…read more

Source:: http://nist-takingmeasure.blogs.govdelivery.com/womens-body-armor-staying-ahead-curves/

      

Posted in Featured Articles

Open Source versus Commercial Compilers

Thumbnail for 82429

By Jacob_Beningo

01-CoreMark

Using open source and free software seems to be engrained in the DNA of software developers. Given a choice to pay or build a developer will usually choose build. When it comes to compilers, building their own compiler would take far too long and be very error prone so developers choose open source tools such as GCC to save the few thousand dollars’ investment in a commercial compiler. The justification is usually that they do the same thing so why pay the money? The interesting truth is that commercial compilers offer developers many benefits the most important being performance improvements.

It’s easy to imagine that one compiler is just as good as any other. After all, aren’t all those optimization algorithms that are used to compile C code been well documented and published for almost 50 years now? There really hasn’t been a good way for developers to compare one compiler to another as far as how well the compiled code runs on a target microcontroller. In the last few years a new benchmark was released by EEMBC known as the CoreMark which allows developers to put their microcontrollers through performance testing and see how well they do. The cool thing …read more

Source:: http://beningo.com/open-source-versus-commercial-compilers/

      

Posted in Featured Articles

Know Nukes: Reference Materials for Nuclear Forensics

By Jacqueline Mann

Legwarmers, preppies, yuppies, Molly Ringwald, nuclear paranoia … the 1980s were my favorite decade. I was in junior high school in New Jersey when I saw The Day After, a 1983 TV movie that depicted a nuclear war between the United States and the Soviet Union. The focus of the movie, however, was not on […]

The post Know Nukes: Reference Materials for Nuclear Forensics appeared first on NIST Taking Measure Blog.

…read more

Source:: https://nist-takingmeasure.blogs.govdelivery.com/know-nukes-reference-materials-nuclear-forensics/

      

Posted in Featured Articles

Know Nukes: Reference Materials for Nuclear Forensics

By Jacqueline Mann

Legwarmers, preppies, yuppies, Molly Ringwald, nuclear paranoia … the 1980s were my favorite decade. I was in junior high school in New Jersey when I saw The Day After, a 1983 TV movie that depicted a nuclear war between the United States and the Soviet Union. The focus of the movie, however, was not on […]

The post Know Nukes: Reference Materials for Nuclear Forensics appeared first on NIST Taking Measure Blog.

…read more

Source:: http://nist-takingmeasure.blogs.govdelivery.com/know-nukes-reference-materials-nuclear-forensics/

      

Posted in Featured Articles

7 Tips for using an RTOS

Thumbnail for 82431

By Jacob_Beningo

Computer keyboard with a pink sticky note with text tips and tricks, Tips and Tricks

Real-time operating systems (RTOSes) have become a critical component in many embedded systems. Transitioning from bare-metal scheduling to an RTOS can be tricky business. Here are seven tips to help make the transition easier.

Tip #1 – Plan out your architecture first

If you have never used UML or been big into software architectures, now is the time to learn about it. When using an RTOS, it is critical that developers think through each task, synchronization and communication mechanisms. These details can’t just be stored in the mind of an engineer but need to be put down in diagram form so that they can be reviewed and updated as needed. Developing an RTOS based application can get complicated fast and it’s important to think through how the application will behave.

Tip #2 – Carefully track memory usage

Unlike when developing a baremetal application, RTOS tasks and synchronization constructs can very quickly suck the memory dry in a resource constrained device. Developers need to monitor memory very carefully and keep track where it is all going. It is not uncommon to create a half dozen tasks, a few semaphores and mutexes only to find that malloc is failing because all the heap space has been …read more

Source:: http://beningo.com/7-tips-for-using-an-rtos/

      

Posted in Featured Articles

Building a Firearms Toolmark Database

By Xiaoyu Alan Zheng

Although they are mass produced, every firearm is unique, and when fired, they leave unique markings called toolmarks on the bullet and cartridge casing. Law enforcement agencies have used these “fingerprints” to match firearms with bullets as part of their criminal investigations for more than a century. While forensic evidence of this kind wouldn’t likely […]

The post Building a Firearms Toolmark Database appeared first on NIST Taking Measure Blog.

…read more

Source:: http://nist-takingmeasure.blogs.govdelivery.com/building-firearms-toolmark-database/

      

Posted in Featured Articles

Indoor Air Quality Is Nothing To Sneeze At

By Shahana Khurshid

Have you ever wondered if the things inside your house that you consider safe and clean actually are? The perfume that you spray, the plastic food containers that you put in your dishwasher, the carpet that your kids lie on as they watch their favorite TV show, even the wrinkle-resistant clothing you wear — all […]

The post Indoor Air Quality Is Nothing To Sneeze At appeared first on NIST Taking Measure Blog.

…read more

Source:: http://nist-takingmeasure.blogs.govdelivery.com/indoor-air-quality-nothing-sneeze/

      

Posted in Featured Articles

Subscribe to Blog via Email

Enter your email address to subscribe to this blog and receive notifications of new posts by email.

Do NOT follow this link or you will be banned from the site!
Translate »