The "magic number" 1.08 is convenience factor. It is a bunch of math combined into one factor as a shortcut, although sometimes more precise calculation is better.

Posted by Eli Schwartz on Nov 10

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Posted by Ali Polatel on Nov 12

Economizers used in rooftop units and air handlers are multipurpose devices that can improve both the energy efficiency and indoor environment in a wide range of commercial buildings.

Honeywell announced the launch of Honeywell Forge Energy Optimization, a cloud-based, closed-loop, machine learning solution.

OMG Roofing Products has introduced the PowerGrip Plus roof mount system, a watertight structural attachment system used to secure solar racks, HVAC, and other equipment to roofs covered with thermoplastic (TPO and PVC) membranes.

New Champion LX Series packaged units heat and cool residential and light commercial buildings. 

ProSpace packaged terminal air conditioner (PTAC) quiet comfort systems deliver air comfort and quality to the hospitality industry. 

The Model P8SE light commercial air conditioner is a three-phase electric/electric packaged cooling solution. It delivers 14-SEER cooling in capacities ranging 3-5 ton in even tonnages, making it fit for strip malls, restaurants, and retail stores. 

This series of residential package equipment features energy-saving performance as well as cost-effective installation and maintenance.

The units feature an exact-fit replacement design that matches the units to footprints of other manufacturers’ units and eliminates the need for a curb adapter.

Fujitsu’s Technical Service Advisors event was held to strengthen manufacturer-distributor relationships and empower in-field technical support staff.

Last year was a notable one for Testo Inc. as the test and measurement manufacturing company celebrated its 60th anniversary. However, 2018 promises to be just as momentous as Testo US will reach its 35th anniversary milestone.

Investing in the right tools will save your employees’ time and avoid delaying repairs in the rush of summer.

This brief year-end tool review rounds up a handful of items that might make the work a little easier in 2021.

Our new website has been launched today. Tell your visitors why you have started a new presentation and how it benefits them. Mention your goals and project advantages. Try to briefly give your visitors reasons why they should return to your pages.

Plumbing-Heating-Cooling Contractors–National Association members from around the country gathered this month for educational sessions, networking, and industry awards.

BIM technology has proven to be highly expedient for several HVAC plans, especially in terms of cost efficiency, time optimization, and effective planning.

The lab is designed to give students hands-on experience that will help them bridge the gap between classroom instruction and the needs of employers.

This series of zone controls manages circulators and boilers in residential hydronic heating systems. The non-networked devices control up to six heating zones and can be coupled together in various configurations to accommodate any application. 

Posted by Gordon Fyodor Lyon on Sep 01

Quilt, a newly launched company, has introduced a ductless heat pump that they say simplifies the installation and rebate process, while offering transparent pricing.

Variable-speed heat pumps, which dominate the heat pump market in many countries, are getting more attention in the U.S. The NEWS asked several manufacturers about the benefits of the technology.

The DOE's new Rooftop Accelerator program encourages manufacturers to develop efficient commercial rooftop heat pumps for cold climates, which could reduce GHG emissions and energy costs by up to 50%.

BlocPower, a climate technology company focused on greening America's buildings, announced a fundraising round of $150 million, including more than $24 million of Series B corporate equity led by VoLo Earth Ventures and $130 million of debt financing led by Goldman Sachs.

Throughout March, voters will help the staff at Peterman Brothers select four charity partner organizations for 2023.

Posted by Dave Aitel via Dailydave on Nov 02

This Episode is a round table discussion about Ultra-Large Scale Systems. In 2006, a number of authors (among them our guests Linda Northrop, Doug Schmidt, Kevin Sullivan, and Gregor Kiczales) have produced a report that addressed the following question: Given the issues with today's software engineering, how can we build the systems of the future that are likely to have billions of lines of code? In this episode, our guests discuss many of the issues that arise from this kind of system and provide an overview of the research areas that should be investigated in order to tackle the challenge. If you want to get more detailed information, you can read the ULS Report (PDF).

This is another episode where we mainly announce topics related to the podcast itself.

This is a roundtable discussion on model-driven software develoment and product line engineering. It was recorded at the Model-Driven Development and Product Lines: Synergies and Experience conference in October 2006 in Leipzig. The panelists are:

• Axel Uhl, SAP
• Danilo Beuche, Pure Systems
• Juha Pekka Tolvanen, MetaCase
• Tom Stahl, b+m
• Ruediger Schilling, Delta Software Technology

In this episode we talk with Gerard Meszaros about problems and challenges doing unit testing in real-world projects. Starting from a short discussion about the importance of automated unit testing we spend most of this episode to talk about every day problems doing unit testing and how those problems can be solved. Based on this book on xunit testing patterns, Gerard talks about his experiences with unit test smells as an analogy to code smells. He describes an impressive set of unit testing patterns to overcome those difficult testing situations and illustrates them with nice examples everybody doing unit testing will feel familiar with.

In this episode we talk to Galen Hunt about the Singularity research OS. Galen is the head of Microsoft's OS Research Group and, together with a team of about 30 other researches, has built Singularity. We started our discussion by covering the basics of Singularity: why it was designed, what the goals of the project are as well as some of the architectural foundations of Singularity: software isolated processes, contract-based channels and manifest-based programs. In this context we also looked at the role of the Spec# and Sing# programming languages and the role of static analysis tools to statically verify important properties of a singularity application. We then looked a little bit more closely at the role of the kernel and how it is different from kernels in traditional OSes. In a second part of the discussion we looked at some of the experiments the group did based on the OS. These include compile-time reflection, using hardware protection domains, heterogenerous multiprocessing as well as the typed assembly language We closed the conversation with a look at some of the performance characteristics of Singularity, compatibility with traditional operating systems and a brief look at how the findings from Singularity influence product development at Microsoft.

We start our discussion with a brief look at what Haskell is and how a pure functional language is different from non-pure languages. We then look at the basic building blocks and the philosophy of the language, discussing concepts such as the lambda calculus, closures, currying, immutability, lazy evaluation, memoization, and the role of data types in functional languages. A significant part of the discussion is then spent on the management of side effects in a pure language - in other words, the importance of monads. We conclude the episode with a look at Haskell's importance and community today.

This episode is an interview with Tom DeMarco and Peter Hruschka about the new book of the Altantic Systems Guild: Adrenaline Junkies and Template Zombies: Understanding Patterns of Project Behavior. This is a session recorded live at OOP 2009. SE Radio thanks Tom and Peter, SIGS Datacom and the programme chair, Frances Paulisch, for their great support!

Announcement regarding the release cycle.

In this episode we talk with Kent Beck about automated unit testing and JUnit.

Recording Venue: Skype Guest: Michael Hunger Michael Hunger of Neo Technology, and a developer on the Neo4J database, joins Robert to discuss graph databases. Graph databases fall within the larger category of NoSQL databases but they are not primarily a solution to problems of scale. They differentiate themselves from RDBMS in offering a data model built […]

Jeff Meyerson talks to Jun Rao, a software engineer and researcher (formerly of LinkedIn). Jun has spent much of his time researching MapReduce, scalable databases, query processing, and other facets of the data warehouse. For the past three years, he has been a committer to the Apache Kafka project. Jeff and Jun first compare streaming […]

Jeff Meyerson talks to Idit Levine about Unikernels and unik, a project for compiling unikernels. The Linux kernel contains features that may be unnecessary to many application developers--particularly if those developers are deploying to the cloud. Unikernels allow programmers to specify the minimum features of an operating system we need to deploy our applications. Topics include the the Linux kernel, requirements for a cloud operating system, and how unikernels compare to Docker containers.

Travis Kimmel talks with Lara Hogan and Deepa Subramaniam about evidence-based tactics that product and engineering leaders can use to can use to diagnose problems that are holding back their teams, and build healthier, high-performing organizations.

Max Neunhoffer of ArangoDB discusses about multi-model databases in general, and open source ArangoDB, in specific, with show host Nishant Suneja. The show discussion covers motivation behind deploying a multi-model database in an enterprise setting, and deep dives into ArangoDB internals.

Jonathan Boccara, author of The Legacy Code Programmer’s Toolbox discusses understanding and working with legacy code. Working with legacy code is a key skill of professional software development that is often neglected.

Aaron Patterson of GitHub discusses the Ruby language and its runtime.  Host Jeremy Jung spoke with Aaron about the Ruby language and how it works.  They discuss the language virtual machine, concurrency, garbage collection, and JIT compilation.

Vladimir Khorikov discusses functional programming in enterprise applications with Jeremy Jung.

Nigel Poulton, author of The Kubernetes Book and Docker Deep Dive, discusses Kubernetes fundamentals, why Kubernetes is gaining so much momentum, deploying an example app, and why Kubernetes is considered "the" Cloud OS.