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Use Red Flags as Prompts to Measure Static Pressure

Implementing company-wide static pressure measurements can be tough. Let’s look at how you can use red flags to improve your static pressure measurement consistency and reduce callbacks.




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Demand for Evaporative Cooling Comes from Fast-Growing Markets

Evaporative cooling is growing in demand as cooling needs are expanding.




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Smart Thermostats Elevate A/C From Appliance to Tech Gadget

Thermostats are like other pieces of interactive equipment: People are thrilled by each development but move on quickly when the next feature comes along.




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The Go-to Thermostats From Contractors

Since HVAC contractors are usually the ones installing the systems, not to mention performing maintenance, when necessary, their opinions on comfort controls are not to be taken lightly




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Navigating the A2L Transition: Insights from the International Code Council

New A2L-related code requirements will impact HVAC system installation and include warning labels, ventilation, leak detection, and limits on refrigerant amounts for comfort air conditioning.




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Letters From Our Readers: December 2, 2019

I’ve heard a lot about power bills, even with new a/c units. New units show increased savings, but it’s nothing like the mini splits of today.




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Community Church Benefits From Unitary Variable Refrigerant Flow Retrofit

With over 1,000 Sunday service attendees and many church activities throughout the week, energy efficiency for the sake of cost savings was critical.




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Heat Pump Awareness Grows from Residential, Commercial Customers

Consumer awareness and opinion of heat pumps are both improving, along with the technology. Manufacturers see a strong market ahead, although some challenges remain.




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The Impact of Adding or Removing Water from Air

We often humidify and dehumidify as part of our work, but let’s take a different look at what happens when we do that.




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Efficiency Standards Prompt Rooftop Innovations

More than half of U.S. commercial building space is cooled by packaged HVAC equipment, according to the U.S. Department of Energy (DOE). So it comes as no surprise that energy efficiency is the biggest trend driving the rooftop market.




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Smaller Buildings Can Benefit From Building Automation Systems

Small- to medium-sized buildings make up about 94% of all commercial buildings in the U.S., according to the U.S. Energy Information Administration, yet only 13% of those buildings have a building automation system.




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Hybrid Heat Pumps Offer Practical Compromise

Hybrid systems offer a pathway that balances environmental concerns with practical considerations, ensuring a more sustainable and feasible transition towards cleaner energy sources.




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How to Explain Odor from Gas Furnace

Any furnace with induced draft combustion may occasionally exhibit unburned gas odor near the furnace in the off cycle.




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Episode 60: Roman Pichler on Scrum

This episode features Scrum, a very popular Agile software development framework. We interview Roman Pichler, a Certified ScrumMaster Trainer and independent consultant. Roman explains the principles behind Scrum, its roles and its key practices. He also answers FAQs. This episode continues our track on software development processes discussing an additional Agile method. Roman is currently writing a book on Scrum in German that provides more in-depth information of the topics discussed in the podcast. The book will be available in autumn 2007 published by d.punkt (Heidelberg, Germany).




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Episode 93: Lessons Learned From Architecture Reviews with Rebecca Wirfs-Brock

In this episode, Markus talks to Rebecca Wirfs-Brock on what she has learned from architecture reviews. This is a very complement to the earlier episode on architecture evaluation.




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Episode 161: Agile Product Management with Roman Pichler

In this episode, we discuss with Roman Pichler how Scrum impacts product management and how agile product management differs from traditional approaches. The topics covered include product owners on large projects and product owner teams, facilitating customer feedback through early and frequent releases, envisioning the product, and creating products with the minimum functionality. Enjoy!




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Episode 192: Open Source Development: Perspectives From Management Science

Recording Venue: Swiss Federal Institute of Technology, Zürich Guest: Georg von Krogh Open source development has had a major impact on both private and public development and use of software. This is an interview with one of the key researchers on open source development, Professor Georg von Krogh of the Swiss Federal Institute of Technology in […]




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SE-Radio Episode 270: Brian Brazil on Prometheus Monitoring

Jeff Meyerson talks with Brian Brazil about monitoring with Prometheus, an open source tool for monitoring distributed applications. Brian is the founder of Robust Perception, a company offering Prometheus engineering and consulting. The high level goal of Prometheus is to allow developers to focus on services rather than individual instances of a given service. Prometheus is based off of the Borgmon monitoring tool, widely used at Google, where Brian previously worked. Jeff and Brian discuss the tradeoffs of choosing not to replicate our monitoring data. In some situations, the monitoring system will lose data because of this decision. Other topics that are discussed are distributed consensus tools, integrations with Prometheus, and the broader topic of monitoring itself.




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SE-Radio Episode 284: John Allspaw on System Failures: Preventing, Responding, and Learning From

John Allspaw CTO of Etsy speaks with Robert Blumen about systemic failures and outages. Why they cannot be totally prevented, how to respond, and what we can learn from them.




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SE-Radio Episode 319: Nicole Hubbard on Migrating from VMs to Kubernetes

Edaena Salinas talks with Nicole Hubbard at KubeCon 2017. They discuss why WP engine is migrating from VMs to Kubernetes and how the migration is structured. Nicole explained the VM infrastructure at WP Engine and why there was a need to move...




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Episode 438: Andy Powell on Lessons Learned from a Major Cyber Attack

Andy Powell is the CISO of AP Moller Maersk and discusses the 2017 cyber attack that hit the company and the lessons learned for preventing and recovering from future attacks.




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Episode 486: Bob Nystrom on Dart

Bob Nystrom, author of Crafting Interpreters and a software engineer at Google working on the Dart programming language, discusses the key features of Dart which make it an excellent choice for fast apps on any platform.




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Episode 527: Adrian Kennard and Kevin Hones on Writing a Network OS from Scratch

Adrian Kennard and Kevin Hones, Founders of FireBrick routers and firewalls, discuss how to design, build, test and support a hardware router and network operating system from scratch, while sharing the lessons learned. You'll also learn that in certain..




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How to Defeat the Far-Right: Lessons From the French Left

Analyst Jean Bricmont offers a deep analysis of how France's left-leaning coalition swept a plurality of seats in the recent snap elections.











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How To Use Gmail Account To Relay Email From a Shell Prompt

handy reference




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QUIZ: How fast is Mbappé? Quicker than Nitro from Gladiators?

In a Champions League match between his team, Paris Saint Germain, and Real Sociedad, the French forward managed to run 100m in 10.9 seconds.




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Quiz: Can you spot the fake news stories from the US election?

Find out which viral news stories from the US election are real or fake with this quiz.




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What plans can we expect from Donald Trump as president?

Mr Trump will announce his wider plans for his government in due course, but here are some of the big issues he talked about during the election campaign.




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Your Planet: Environmental news from around the world

Nina brings us an animal themed Your Planet this week with stories from South Africa and the United States of America, as we look at what is being done to help endangered animals.




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South Asian smog cloud so big it can be seen from space

Children in some areas of Pakistan are facing school, park and zoo closures, amongst other restrictions, as smog continues to affect the area.




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Assessment Study Guides from the CareerTech Testing Center

The CareerTech Testing Center (CTTC) works closely with instructors, industry representatives and credentialing entities to identify and develop assessments and assessment preparation materials that are aligned with recognized industry standards.

Study guides are designed to help students prepare for the assessments. Each study guide includes:
  • information about the assessments within a content area
  • the standards upon which each assessment is based
  • test plans
  • practices questions
  • test-taking strategies
  • many study guides also include a crosswalk to instructional materials that may be used during instruction or when studying for assessments.
CTTC assessments are directly aligned to assessments needed to obtain credentials that are required and/or valued by industry. Assessments measure how well the student has mastered the content deemed important by industry, and while passing a CTTC assessment is no guarantee of future success, it does provide an indication of whether or not the student is ready for certification or licensure.

Click here for Study Guides and please contact us if you have any questions!

The CareerTech Testing Center has been developing skills standards and online tests since 1980 as we work closely with instructors, program administrators, industry representatives, and credentialing entities to ensure that our study guides and assessments reflect national standards and local industry needs.




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Blended Learning and Career and Technology Education - Part IV: Implementing Blended Learning With Resources from the Oklahoma Department of Career and Technology Education



In this four-part series, I’ll define blended learning, discuss the models of blended learning, the implications for career and technical education, and how the Curriculum, Assessment, and Digital Delivery (CADD) areas of the Oklahoma Department of Career and Technology Education can assist in the implementation of blended learning.

Photo courtesy of the Clayton Christensen Institute
Blended learning is a shift to an online instructional delivery for a portion of the day to make students, teachers, and schools more productive, both academically and financially.  We all know there’s no single right approach to building the “perfect” model for blended learning as communities have different resources, classrooms, computers, schedules, and many other unique needs.  A school doesn’t always have the resources or the expertise to select and purchase a learning management system (LMS), design lessons, or write assessments, but there are available resources.

Did you know that the Curriculum, Assessment, and Digital Delivery areas of the Oklahoma Department of Career and Technology Education can assist in the implementation of blended learning?  The National Technology Plan acknowledges the challenges of raising college and career-ready standards without a significant investment of new funding so check out our online catalog and search the following links for additional information and see how we can assist you in blending digital and teacher led instruction to personalize learning for each student.







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District heating – Heat from a central boiler plant

District heating is a system which provides a number of buildings with heat from a central boiler plant through pre-insulated pipes. Pre-insulated pipes are in fact a modern kind of heat culvert or district heating duct, but since these systems... Read more

The post District heating – Heat from a central boiler plant appeared first on EEP - Electrical Engineering Portal.




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Electrical engineering for hydropower, from run-of-river to pumped storage plants

Nowadays, when we all see and feel the colossal crisis looming on the horizon, the question of energy security is among the first things on the table in each country’s management. It’s now essential more than ever for each country... Read more

The post Electrical engineering for hydropower, from run-of-river to pumped storage plants appeared first on EEP - Electrical Engineering Portal.




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Access to the forum from South Korea

A couple of weeks ago, we blocked access to the forum from all IPs from South Korea. The forum had been under attack by some organised spammers for a few weeks, and it was ruining the forum. The attack was, presumably, using something like a botnet as there was a seemingly unending supply of different IPs used. Day after day, hundreds and hundreds of posts were being made and it was impossible to keep up with deleting and banning the accounts posting the spam. This was affecting the forum- people were complaining, and many were simply put off by finding page after page of nonsensical messages. The spam filter was not catching a lot of the messages as most didn't contain links but text pointing towards sites that were probably full of malware.




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Non-Roman Language

I have been studying Lao for the last few months. As I leave the school and go home to work on the internet, I don't practise that much. But I have been learning how to read and write in Lao. 




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Mastering Electrical Connectivity: From Circuit Topology to Switching Classifications

This technical article aims to delve into various aspects of electrical connectivity, symbol representation, and isolation methodologies, shedding light on fundamental concepts and practical applications within the field. From the intricacies of electrical connection and circuit topology to the symbolism... Read more

The post Mastering Electrical Connectivity: From Circuit Topology to Switching Classifications appeared first on EEP - Electrical Engineering Portal.




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Automated, but hackable. Is power grid in your country safe from cyberattacks?

Yes, many of today’s power grids are very sophisticated and automated. Every single event and piece of equipment is tracked, controlled, measured, and protected. But things aren’t as bright as it seems. As we can see, it turns out that... Read more

The post Automated, but hackable. Is power grid in your country safe from cyberattacks? appeared first on EEP - Electrical Engineering Portal.




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Coach's Corner: Handling PR Disasters - What WE Can Learn from the Airline Industry

Your restoration company could find itself in a PR disaster of its own in your local community should something go awry. Are you ready?




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Carbo-Tec FLX from Georgia Boot

These slip-resistant work boots feature a durable Carbo-Tec rubber outsole, triple support Shovel Shank XL, and FLX-FIT technology for a flexible fit.




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Responding to a Challenging Year: Lessons From Farmers

Discover how lessons from farmers can help restoration business leaders navigate challenging seasons, adapt to market shifts, and build a foundation for future growth.




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Mastering the Art of Estimating: Insights from Industry Experts Kevin Mardegian and Tess Huge

In the latest episode of Ask the Expert, Kevin Mardegian and Tess Huge share their expertise on estimating within the restoration industry. Discover key strategies for onboarding homeowners, negotiating with adjusters, and enhancing cash flow while building a collaborative network that elevates the entire industry. Join us to learn how mastering the art of estimating can drive success in your restoration business.




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Lessons from the Gridiron: Leadership Principles for Restoration Businesses

Discover how Clemson’s head football coach Dabo Swinney leads with integrity, values team-first mentality, and builds a culture of accountability—principles that can transform your business leadership approach and drive long-term success.