Aarhus University was founded in 1928 and is the second oldest university in Denmark. It has a total enrollment of approximately 39,000 students and employed around 9,000 faculty members and staff. During the summer its doors are open to everyone on earth.
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.
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“Standard Root Beer” is typically made using a combination of ingredients that include water, sugar, sassafras root or extract, and various other flavoring agents. Here’s a general overview of the process:
Sassafras Flavoring: In traditional root beer recipes, sassafras root or extract is a key ingredient. However, it’s important to note that sassafras contains safrole, a compound that has been deemed potentially carcinogenic. For this reason, commercial root beers often use a safrole-free sassafras flavoring.
Sweetener: Sugar is commonly used to sweeten root beer, although some recipes may use alternatives like corn syrup or honey. The amount of sweetener can vary based on personal preference.
Water: Root beer typically starts with plain water as its base. The water is heated to dissolve the sweetener and other ingredients.
Flavorings: Besides sassafras flavoring, root beer can include a range of other flavorings to create its distinct taste. These may include wintergreen, vanilla, anise, licorice, molasses, or other herbs and spices. The exact combination of flavors varies among different root beer recipes.
Carbonation: Carbonation gives root beer its characteristic fizz. This can be achieved by using carbonated water or by introducing carbon dioxide gas into the mixture. In commercial production, carbonation is typically added during the bottling process.
Yeast Fermentation (optional): Some traditional homemade root beer recipes involve a fermentation step. Yeast is added to the root beer mixture, which consumes the sugar and produces carbon dioxide as a byproduct. This creates a natural carbonation in the beverage. However, this step can also increase the alcohol content, so it’s important to be mindful of the fermentation duration.
Bottling and Aging: Once the root beer is prepared, it is typically poured into bottles or kegs and sealed. Some recipes may recommend allowing the root beer to age for a certain period to develop the desired flavors.
It’s worth noting that the commercial production of root beer may involve different processes, as well as the use of artificial flavors, stabilizers, and preservatives to ensure consistency and shelf life. The specific recipe and production methods may vary among manufacturers.
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40 years ago today, “The Big Chill,” a movie about a group of U-M grads written and directed by alum Lawrence Kasdan, debuted in theaters. 🎥 pic.twitter.com/fUVDNGXSNW
— Alumni Association of the University of Michigan (@michiganalumni) September 28, 2023
“Ironically, on the 200th anniversary of our Bill of Rights, we find free speech under assault throughout the United States, including on some college campuses. The notion of political correctness has ignited controversy across the land. And although the movement arises from the laudable desire to sweep away the debris of racism and sexism and hatred, it replaces old prejudice with new ones. It declares certain topics off-limits, certain expression off-limits, even certain gestures off-limits.”
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