May 28, 1936: Alan Turing submitted his paper “On Computable Numbers, with an Application to the Entscheidungsproblem” that would quietly spark the digital revolution with the design of a machine (Bombe) that significantly shortened World War Two in Europe.
“Science is a differential equation. Religion is a boundary condition.”
— Physics In History (@PhysInHistory) May 16, 2025
– Alan Turing (1912-1954)
#OnThisDay May 28, 1936, Alan Turing submitted his paper “On Computable Numbers, with an Application to the Entscheidungsproblem” for publication.
It quietly laid the foundations of modern computer science.
A thread: pic.twitter.com/meIuDnn9VI
— History of the day (@hist_of_the_day) May 28, 2025
“Children in the Garden” 1892 Gładysław Podkowiński
The purpose of the American Standard for Nursery Stock — ANSI Z60.1 — is to provide buyers and sellers of nursery stock with a common terminology in order to facilitate transactions involving nursery stock. This standards establishes common techniques for
(a) measuring plants,
(b) specifying and stating the size of plants,
(c) determining the proper relationship between height and caliper, or height and width, and
(d) determining whether a root ball or container is large enough for a particular size plant.
This document — prepared under a grant to ANSI by AmericanHort — is a communication tool for the exchanges of products and services but does not provide buyers with any assurance of the health or quality of the nursery stock being specified or sold. It does not cover labor resources.
The American Hort standards landing page is linked below:
CLICK HERE for the current edition of ANSI Z60.1 2014
The 2014 revision should be entering another revision cycle though the pandemic has slowed standards setting among many non-profits. We encourage front-line staff to participate directly in the American Hort standards setting enterprise. CLICK HERE for contact information.
We sweep through the status of best practice literature for anything related to exterior assets in education communities during our Bucolia colloquium. See our CALENDAR for the next online meeting; open to everyone.
We continue sorting through anomalies with Godaddy Tech Support to resolve Standards Michigan requirement for frequent and timely updates across all of our platforms. We got half the problem solved last month when we upgraded to WordPress 6.8.1 but updating was slow on mobile devices. Now we need another PHP update. Our normal course of business will not be interrupted as far as our daily colloquia is concerned but we cannot predict the outcome on the images which are an essential part of our work.
Posts are not updating across all platforms — particularly on X on iPhones. Usually a caching problem and not one we haven’t seen before.
Some images will not center.
Footer and right-side widgets not loading properly.
The good news is that all our content, including media, survived the WordPress upgrade. The next step in our “GoDaddy Journey” will be the PHP upgrade this week. There will likely be surprises but none that we cannot handle.
Much like hardware in ICT, software must also be maintained.
This page will be posted to our X-feed: @StandardsMich to remind our colleagues and followers that software needs to be “maintained”
Although electrical power delivered with both active and reactive components our interest lies primarily in the useable power component — watts (power) and watt-hour(energy). A secondary concern is whether or not energy useage meters are over-specified; particularly on points in building power chains downstream from the utility service meters.
Electrical meters, used for measuring electricity consumption, must comply with various codes and standards to ensure accuracy, safety, and reliability. Today at the usual hour – from the user point of view – we will review the status of key codes and standards relevant to electrical meter manufacturing, primarily focusing on North American standards. Use the login credentials at the upper right of our home page.
The Federal Energy Regulatory Commission is an independent agency within the U.S. federal government that regulates interstate transmission of electricity, natural gas, and oil. It oversees wholesale energy markets, pipeline infrastructure, and hydroelectric projects, ensuring fair rates and reliability. While independent, FERC operates under the Department of Energy’s umbrella but does not take direct orders from the executive branch.
FERC enforces energy laws, approves infrastructure projects, and regulates market competition. FERC plays a crucial role in balancing economic, environmental, and energy security concerns, aiming to maintain a stable and efficient energy system across the United States. Since the U.S. shares interconnected electricity grids with Canada and Mexico, FERC’s decisions on transmission rules and pricing affect energy flows and grid reliability in both countries.
Our interest lies in closing a technical gap that exists upstream from the building service point and downstream from the utility supply point. Some, not all of it, can be accomplished with titles in the IEEE catalog.
Given the dominance of vertical incumbents in the electric power domain, we have submitted a tranche of reliability concepts into the ASHRAE, NFPA and ICC catalogs — not so much with the expectation that they will be gratefully received — but that our proposals will unleash competitive energies among developers of voluntary consensus standards.
In power system engineering, availability and reliability are two important concepts, but they refer to different aspects of the system’s performance.
Reliability:
Reliability refers to the ability of a power system to perform its intended function without failure for a specified period under given operating conditions. It is essentially a measure of how dependable the system is.
Reliability metrics often include indices such as the frequency and duration of outages, failure rates, mean time between failures (MTBF), and similar measures.
Reliability analysis focuses on identifying potential failure modes, predicting failure probabilities, and implementing measures to mitigate risks and improve system resilience.Availability:
Availability, on the other hand, refers to the proportion of time that a power system is operational and able to deliver power when needed, considering both scheduled and unscheduled downtime.
Availability is influenced by factors such as maintenance schedules, repair times, and system design redundancies.
Availability is typically expressed as a percentage and can be calculated using the ratio of the uptime to the total time (uptime plus downtime).
Availability analysis aims to maximize the operational readiness of the system by minimizing downtime and optimizing maintenance strategies.
Reliability focuses on the likelihood of failure and the ability of the system to sustain operations over time, while availability concerns the actual uptime and downtime of the system, reflecting its readiness to deliver power when required. Both concepts are crucial for assessing and improving the performance of power systems, but they address different aspects of system behavior.
Comment:These 1-hour sessions tend to be administrative in substance, meeting the minimum requirements of the Sunshine Act. This meeting was no exception. Access to the substance of the docket is linked here.
On Monday June 13th, Federal Energy Regulatory Commission commissioners informed the House Committee on Energy and Commerce that the “environmental justice” agenda prohibits reliable dispatchable electric power needed for national power security. One megawatt of natural gas generation does not equal one megawatt of renewable generation. The minority party on the committee — the oldest standing legislative committee in the House of Representatives (established 1795) — appears indifferent to the reliability consequences of its policy.
“Our nation’s continued energy transition requires the efficient development of new transmission infrastructure. Federal and state regulators must address numerous transmission-related issues, including how to plan and pay for new transmission infrastructure and how to navigate shared federal-state regulatory authority and processes. As a result, the time is ripe for greater federal-state coordination and cooperation.”
At the July 20th meeting of the Federal Energy Regulatory Commission Tristan Kessler explained the technical basis for a Draft Final Rule for Improvements to Generator Interconnection Procedures and Agreements, On August 16th the Commission posted a video reflecting changes in national energy policy since August 14, 2003; the largest blackout in American history.
Today at 16:00 UTC we review best practice for engineering and installing the point of common coupling between an electrical service provider its and an purchasing — under the purview of NEC CMP-10.
Use the login credentials at the upper right of our home page.
The relevant passages of the National Electrical Code are found in Article 230 and Article 495. We calibrate our attention with the documents linked below. These are only representative guidelines:
We are in the process of preparing new (original, and sometimes recycled) proposals for the 2026 National Electrical Code, with the work of Code Panel 10 of particular relevance to today’s topic:
First Draft Meetings: January 15-26, 2024 in Charleston, South Carolina
Electrical meter billing standards are generally regulated at the state or local level, with guidelines provided by public utility commissions or similar regulatory bodies. These tariff sheets are among the oldest in the world. There are some common standards for billing and metering practices, including:
Meter Types: There are various types of meters used to measure electricity consumption, including analog (mechanical) meters, digital meters, and smart meters. Smart meters are becoming more common and allow for more accurate and real-time billing.
Billing Methodology:
Residential Rates: Most residential customers are billed based on kilowatt-hours (kWh) of electricity used, which is the standard unit of energy.
Demand Charges: Some commercial and industrial customers are also subject to demand charges, which are based on the peak demand (the highest amount of power drawn at any one point during the billing period).
Time-of-Use Rates: Some utilities offer time-of-use (TOU) pricing, where electricity costs vary depending on the time of day or season. For example, electricity may be cheaper during off-peak hours and more expensive during peak hours.
Meter Reading and Billing Cycle:
Monthly Billing: Typically, customers receive a bill once a month, based on the reading of the electricity meter.
Estimation: If a meter reading is not available, some utilities may estimate usage based on historical patterns or average usage.
Smart Meter Readings: With smart meters, some utilities can provide daily or even hourly usage data, leading to more precise billing.
Meter Standards: The standards for electrical meters, including their accuracy and certification, are set by national organizations like the National Institute of Standards and Technology (NIST) and the American National Standards Institute (ANSI). Meters must meet these standards to ensure they are accurate and reliable.
Utility Commission Regulations: Each state has a utility commission (such as the California Public Utilities Commission, the Texas Public Utility Commission, etc.) that regulates the rates and billing practices of electricity providers. These commissions ensure that rates are fair and that utilities follow proper procedures for meter readings, billing cycles, and customer service
Large University “Utilities”. Large colleges and universities that generate and distribute some or all of their electric power consumption have developed practices to distribute the cost of electricity supply to buildings. We will cover comparative utility billing practices in a dedicated colloquium sometime in 2025.
Metering for New Buildings: New buildings larger than 25,000 square feet must be equipped with metering to measure the electrical energy usage of the entire building.
Tenant Spaces: In buildings with tenant spaces, individual tenant spaces larger than 10,000 square feet must also be separately metered.
Subsystem Metering: Buildings with electrical loads exceeding specified thresholds must have additional metering to measure energy use for various subsystems, including:
HVAC systems
Lighting systems
Plug loads
Process loads
These metering requirements are intended to help building owners and operators monitor energy consumption, identify opportunities for energy savings, and comply with building energy codes and standards.
The American Society of Heating, Refrigerating, and Air Conditioning Engineers (ASHRAE) is an ANSI-accredited continuous-maintenance standards developer (a major contributor to what we call a regulatory product development “stream”). Continuous maintenance means that changes to titles in its catalog can change in as little as 30-45 days. This is meaningful to jurisdictions that require conformance to the “latest” version of ASHRAE 90.1
Among the leading titles in its catalog is ASHRAE 90.1 Energy Standard for Sites and Buildings Except Low-Rise Residential Buildings. Standard 90.1 has been a benchmark for commercial building energy codes in the United States and a key basis for codes and standards around the world for more than 35 years. Free access to ASHRAE 90.1 version is available at the link below:
Chapter 9: Lighting, begins on Page 148, and therein lie the tables that are the most widely used metrics (lighting power densities) by electrical and illumination engineers for specifying luminaires and getting them wired and controlled “per code”. Many jurisdictions provide access to this Chapter without charge. Respecting ASHRAE’s copyright, we will not do so here but will use them during today’s Illumination Colloquium, 16:00 UTC.
Keep in mind that recently ASHRAE expanded the scope of 90.1 to include energy usage in the spaces between buildings:
Education industry facility managers, energy conservation workgroups, sustainability officers, electric shop foreman, electricians and front-line maintenance professionals who change lighting fixtures, maintain environmental air systems are encouraged to participate directly in the ASHRAE consensus standard development process.
Univerzita Karlova
We also maintain ASHRAE best practice titles as standing items on our Mechanical, Water, Energy and Illumination colloquia. See our CALENDAR for the next online meeting; open to everyone.
Issue: [Various]
Category: Mechanical, Electrical, Energy Conservation, Facility Asset Management, US Department of Energy, #SmartCampus
Colleagues: Mike Anthony, Larry Spielvogel, Richard Robben
Here we shift our perspective 120 degrees to understand the point of view of the Producer interest in the American national standards system (See ANSI Essential Requirements). The title of this post draws from the location of US and European headquarters. We list proposals by a successful electrical manufacturer for discussion during today’s colloquium:
2026 National Electrical Code
CMP-1: short circuit current ratings, connections with copper cladded aluminum conductors, maintenance to be provided by OEM, field markings
CMP-2: reconditioned equipment, receptacles in accessory buildings, GFCI & AFCI protection, outlet placement generally, outlets for outdoor HVAC equipment(1)
(1) Here we would argue that if a pad mount HVAC unit needs service with tools that need AC power once every 5-10 years then the dedicated branch circuit is not needed. Many campuses have on-site, full-time staff that can service outdoor pad mounted HVAC equipment without needing a nearby outlet. One crew — two electricians — will run about $2500 per day to do anything on campus.
CMP-3: No proposals
CMP-4: solar voltaic systems (1)
(1) Seems reasonable – spillover outdoor night time lighting effect upon solar panel charging should be identified.
CMP-5: Administrative changes only
CMP-6: No proposals
CMP-7: Distinction between “repair” and “servicing”
CMP-10: Short circuit ratings, service disconnect, disconnect for meters, transformer secondary conductor, secondary conductor taps, surge protective devices, disconnecting means generally, spliced and tap conductors, more metering safety, 1200 ampere threshold for arc reduction technology, reconditioned surge equipment shall not be permitted, switchboard short circuit ratings
There are five key components needed to address in each construction contract as a protection against litigation in an industry that is rich in possibilities.
Scope of the project. …
Total cost and payment requirements. …
Project timeline. …
Lien law protection. …
Dispute resolution.
Today at the usual hour we examine a few representative contracts:
The cost of compliance with general conditions in a typical construction project can vary widely depending on factors like project size, complexity, location, and specific requirements. General conditions refer to the indirect costs that support the project—things like project management, temporary facilities, safety measures, and administrative expenses—not the direct costs of labor, materials, or equipment tied to physical construction.
In percentage terms, general conditions typically account for 5% to 15% of the total project cost, with most projects falling in the 5% to 10% range for standard residential or commercial builds. Smaller projects might see percentages closer to or exceeding 10% because fixed costs (like a site trailer or a project manager’s time) don’t scale down as much as direct costs. Larger, more complex projects—like industrial or infrastructure work—might trend toward the lower end (5% or less) since direct costs dominate, diluting the relative impact of general conditions. For example, a $300,000 residential project might allocate $15,000 to $30,000 (5% to 10%) for general conditions, while a $10 million commercial project could see $500,000 or less (5%) if efficiencies kick in.
New update alert! The 2022 update to the Trademark Assignment Dataset is now available online. Find 1.29 million trademark assignments, involving 2.28 million unique trademark properties issued by the USPTO between March 1952 and January 2023: https://t.co/njrDAbSpwBpic.twitter.com/GkAXrHoQ9T
