The physical effect known as stepwise precession is a surprising fact that takes place in the movement of an elastic pendulum. When this pendulum is initially set near the downward equilibrium vertical configuration, with the length of the spring stretched by the gravity force, there is a chance to move in such a way that the springing vibrational mode of movement and the rotational "swing" mode interchange periodically their respective energies, with a periodic change of the swing plane and stepwise precession. We simulate here numerically the same dynamical behaviour for the natural extension of a double elastic-spherical pendulum.

Greenbuild 2023 will celebrate the U.S. Green Building Council’s 30th anniversary and newest version of LEED.

Initially, Arizona’s Efficiency Arizona program, in partnership with community action agencies, will focus on providing heat pumps through an a/c replacement program that addresses heat-relief emergencies and/or financial hardships.

Colorado’s total allocation for both Home Energy Rebates programs is more than $70 million.

Based on scientific discoveries at Kano Laboratories, Kroil creeps into millionth inch spaces, dissolves rust and lubricates to loosen frozen metal parts. Kroil’s unique molecular structure creates an affinity to metal assuring swift penetration.

The Contractors Association of Kauai (CAK is offering multiple scholarships to Kauai residents seeking a career in a construction-related field of study.

The 250,000-square-foot facility — customized for broad training purposes, administration, and manufacturing — joins several other Watts Works Learning Centers across North America.

The survey explored homeowners’ attitudes toward the Inflation Reduction Act and home upgrades, specifically heat pumps, that increase sustainability.

The Daikin Seattle Experience Center is equipped with cutting-edge technology and interactive exhibits that provide a hands-on learning experience for all ages, the company said in a press release.

ACCA's annual awards recognize outstanding achievements in the HVACR industry, and the program is widely recognized as a celebration of the best of the best.

James Piccione founded Aspen Manufacturing in 1975, and the company is now one of the largest independent manufacturers of evaporator coils and air handlers for the residential and light commercial HVAC markets in the U.S. and Canada.

ABMA's Boiler 2024 is scheduled for May 1-3, 2024, at the Gaylord Rockies Resort & Convention Center in Aurora, Colorado, just outside Denver.

The event attracted nearly 100 mechanical and electrical contractors from the surrounding area, opening the door for new business avenues both for Republic and its manufacturer partners.

Rheem's new Innovation Learning Center is a $5 million facility designed to meet the training needs of specialists in Rheem's air-conditioning and water-heating divisions.

The Massachusetts facility will provide lectures and hands-on laboratory experiences led by seasoned LG instructors.

With the recent surge of interest in IAQ options, consumers might easily forget that those components must still work within a system.

Fieldpiece Instruments opened a U.K. office to add to its European operation and to provide sales and customer service in the United Kingdom.

With modern technology, HVAC contractors can leave paperwork behind, and instead share information in real-time.

New Mexico is jump-starting its rebates program by offering low-income owners of single-family homes up to $1,600 off of home insulation purchased at participating retailers. Later, the state will offer rebates for heat pumps and other high-efficiency appliances.

Famous Supply is planning a December 17 ribbon-cutting for its new 354,000-square-foot distribution center in Maple Heights, Ohio.

The 48,000-square-foot facility aims to streamline Endress+Hauser's global product distribution.

Despite their similar exterior appearance, cooling towers and closed-circuit coolers are very different pieces of equipment with distinct advantages and limitations. This is especially true when determining which option is best suited for a specific cooling application.

ABC argues the rule could end up hurting legitimate contractors in the building trades, who are already strapped for workers.

With the demand for new homes skyrocketing, more HVAC businesses are opening to meet demand, according to two new reports.

“(I’m Your) Heat Pump” is a soft, funky, R&B love song told from the perspective of a heat pump that depicts just what a heat pump can provide to its users.

Eberhard and Markus discuss the important topic of associations and dependencies in this show. While OO languages provide direct support for subtyping, most don't provide a first-class construct for other relationships between objects. The discussion elaborates on the problem and looks at various remedies, most importantly, dependency injection.

In this episode we're talking to Dirk Riehle about open source business models. We started looking at the way OS projects work and defined different kinds of open source projects. In the main part of the discussion we looked at various ways of how to make money with open source: consulting, support contracts, commercial variant of an open source project, etc. We then looked at the chances and risks of each of these approaches. The next part focused on different open source licenses and how they are suitable for open source business. We concluded the episode by discussing a couple of specific questions and loose ends. After the show, Dirk informed me about the following three corrections: Black Duck Software's main product is called protexIP not IP Central, there are presently 70 licenses approved by the Open Source Initiative, and EnterpriseDB has so far acquired $37M in venture capital

In this episode we look at SUN's open source strategy for the OpenJDK. We discuss challenges in creating such a big open source project, and ways to keep it focused and organized. We discuss what it means for the Java runtime to be adopted as the technological foundation for other programming languages.

Recording Venue: Skype Guest: Douglas C. Schmidt In this episode we talk with Douglas C. Schmidt, who is a professor of computer science at Vanderbilt University and a well-respected authority in the fields of patterns and frameworks for concurrent and networked software. In this interview we talk about these topics in the context of massive […]

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 […]

John Purrier talks with Jeff Meyerson about OpenStack, an open-source cloud operating system for managing compute resources. They explore infrastructure-as-a-service, platform-as-a-service, virtualization, containers, and the future of systems development and management.

Nate Black interviews Glynn Bird on using open source to develop your career or get a job, and how maximize productivity and learning. We discuss how to get your pull request accepted, how to make your own project successful, and how to survive updates.

Peter Zaitsev explains: avoiding vendor lock-in, judging what databases are bad at, why not to copy the big players, when to "go with the crowd", when to use cloud services vs. running your own infrastructure, and the role of containerization.

Spencer Kimball talks to Akshay Manchale about CockroachDB which is a distributed, resilient, SQL database system. He talks about challenges of using single node databases and features and principles behind CockroachDB that make it a better alternative open source database.

Software engineer Alex Boten, author of Cloud Native Observability with Open Telemetry, joins SE Radio host Robert Blumen for a conversation about software telemetry and the OpenTelemetry project. After a brief review of the topic and the OpenTelemetry project's origins rooted in the need for interoperability between telemetry sources and back ends, they discuss the open telemetry server and its features, including transforms, filtering, sampling, and rate limiting. They consider a range of topics, starting with alternative topologies with and without the telemetry server, server pipelines, and scaling out the server, as well as a detailed look at extension points and extensions; authentication; adoption; and migration.

Arun Gupta, Vice President and General Manager of Open Ecosystem Initiatives at Intel Corporation, discusses open-source strategy and community with SE Radio host Kanchan Shringi. They explore the business case and business model for why and how big tech participates in the open-source ecosystem. Arun describes ways to foster a culture of engagement with open source within companies such as Intel, Amazon, and Apple. They then consider how the principles can be applied to closed-source software within a company. Finally, they discuss some of the benefits that Intel has gained from more than 20 years of open source contributions and look at the company’s plan for the year ahead. SE Radio is rought to you by IEEE Software magazine and IEEE Computer Society.

M. Scott Ford, the CTO of Corgibytes and host of the Legacy Code Rocks podcast, discusses managing dependency freshness. SE Radio’s Sam Taggart speaks with him about why dependency freshness is important to ensure that your code has all the latest bug fixes, how exactly to measure dependency freshness, and some of the insights that teams can gain from monitoring freshness over time. Brought to you by IEEE Computer Society and IEEE Software Magazine.

Jonathan Schneider, the cofounder of Moderne and the creator of OpenRewrite, talks with SE Radio's Gregory Kapfhammer about automated software maintenance. In addition to exploring the design and implementation of OpenRewrite, Schneider explains how the tool can automatically support software maintenance tasks such as framework migration and security fixes for programs implemented in languages like Java. The episode also explores how OpenRewrite uses the lossless semantic tree to support automated refactoring though the use of recipes. Brought to you by IEEE Computer Society and IEEE Software magazine.

Author Scott Fulford explores the impact that pandemic-related government social spending had on American families.

The National Black Farmers Association just won a historic $2.2 billion in reparations from the U.S. government.

Anna, aged eleven, won a competition to open Latitude Festival with her poem, The Mother Tree. She told Newsround about her experience.

Do you remember Pesto the king penguin chick who reached stardom in September? Zookeepers say he is now entering his "awkward teenage phase".

To be honest, transmission and distribution networks are full of problems. But that’s nothing new, and you already knew that. This technical article will shed some light on solving some pretty severe problems in transmission and distribution networks by using... Read more

The post Controlling power system parameters through reactive power (VAr) compensation appeared first on EEP - Electrical Engineering Portal.

January 12
Fourth Grade Community Project: Going to the Museum
Encourage your students to research and visit a museum in your community with these activities.

When reactive power devices, whether capacitive or inductive, are purposefully added to a power network in order to produce a specific outcome, this is referred to as compensation. It’s as simple as that. This could involve greater transmission capacity, enhanced... Read more

The post Do you know what reactive power compensation is? If not, keep reading, it’s important. appeared first on EEP - Electrical Engineering Portal.

This article will shed some light on how adding capacitors gives the distribution system the necessary reactive power to return the power factor to the required level. Capacitors act as a source of reactive energy, which accordingly reduces the reactive... Read more

The post A few practical ways to determine required reactive energy compensation for a power system appeared first on EEP - Electrical Engineering Portal.

Reactive energy compensation is an essential process in improving energy efficiency. It reduces the power consumption and thus its cost, enables optimum use of installations by preventing them being oversized, and more generally it improves the quality of energy systems.... Read more

The post The theory behind reactive energy compensation that every engineer should know appeared first on EEP - Electrical Engineering Portal.

Carpenter ant infestation is not what is damaging the tree. The tree has begun to rot and is now providing a habitat for the ants.

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Carpenter ant nests are very common inside trees especially older trees that are hollow or have a significant.

. Carpenter Ants will have. Killing the ants wont. These ants almost always attract attention whether they are crawling on the floor in your.

Phantom is an indooroutdoor termiticide and insecticide that kills termites ants cockroaches and. Carpenter ants love to nest in moist wood of trees such as rotting trees tree stumps and tree. When carpenter ants invade a tree there is a risk that they will also invade nearby structures.

WE HAVE AN OLD MAPLE THAT IS LOADED WITH CARPENTER ANTS. A Practical Guide To Carpenter Ant Control For Frisco Property Owners Carpenter Ants In Trees News Killing Carpenter Ants In Your Tree And What They Mean 7 Ingenious. Carpenter ants are drawn to rotting wood in trees and stumps.

Carpenter ants are excavators. They take advantage of. Carpenter ants have a head thats shaped like a heart rather than a circle.

Yes carpenter ants will build their nests and live inside already weakened or decaying tree limbs. Its not likely carpenter ants can kill a tree by themselves. Concentrate on the base of your trees since the ants tend to nest there.

Carpenter ants build their nests outdoors in various wood sources including tree stumps firewood or landscaping. There are a few different methods when choosing how to get rid of carpenter ants. You can try using the.

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A simple mixture of soap and water is toxic to carpenter ants. And trees are their favorite excavation sites. Carpenter ants do not digest wood like termites.

They are fast workers and know how to excavate wood quickly and create smooth tunnels within the. Accumulated coarse sawdust discarded by carpenter ants nesting inside a tree. Mix one part natural dish soap to two parts water in a spray bottle.

The carpenter ant usually gets its name for their ability to build nests so quickly. Do Carpenter Ants Nest in Trees. Spray the diluted peppermint oil all over the area housing the carpenter ants.

How do you get rid of carpenter ants in trees naturally. Some Carpenter Ants reproductive females and males called swarmers have wings. They need a constant water source to survive.

Within a typical carpenter ant colony foragers continuously seek new sources of. IS IT TOO LATE TO SAVE THE TREE. The big black ants that predominantly hang out inside of the tree are called carpenter ants.

Best Pesticides for Carpenter Ants in Trees Pesticide Sprays. An insect that can damage wood structures and homes. The first and most important step is to locate the carpenter ant nest.

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Dan gets honest about how to sharpen your focus which often involves a shocking concept: not multitasking.