Tag Archives: November

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Aaron Copland “Our Town”

Azusa Pacific University Symphony Orchestra | Susanna Cervantes, Graduate Conductor

Recorded Nov. 10, 2018 at the Haugh Performing Arts Center, Glendora CA

Copland wrote the score to the film version of Thornton Wilder’s play in 1940. Comparable to Copland’s other orchestral suite, Appalachian Spring, Our Town is smaller in scale, but holds the same traditional Copland characteristics: the sunrise wake up call in the beginning, the call and response, exploiting the reflective quality of the woodwinds, brass chorales, and the desperately aching sounds of the strings.

He explained, “For the film version, they were counting on the music to translate the transcendental aspects of the story. I tried for clean and clear sounds and in general used straight-forward harmonies and rhythms that would project the serenity and sense of security of the story.” It is dedicated to Leonard Bernstein.

Su Jin Susanna Cervantes is professional freelancer actively working in the greater Los Angeles area. As a cellist, Susanna has played in multiple ensembles such as Hollywood Youth Orchestra, USC Thornton Symphony, and APU Symphony Orchestra.

She has also performed in multiple chamber groups performing works by Barber, Brahms, Borodin, Franck, Mendelssohn, Rachmaninoff, and many more. She has performed in masterclasses with Daniel Hoffman, Lynn Harrell, and Alisa Weilerstein. In addition, she frequents in collaboration with singer-songwriters such as Sleeping At Last, whose hits are featured on ABC’s Grey’s Anatomy; grammy-nominated artist, Michelle Bloom; British Christian singer-songwriter, Matt Redman; and singer/actress, Jackie Tohn.

Susanna is an academic instructor at Orange County School of Arts, teaching String Literature and Music History. She is also a strings coach for the Symphony Orchestra at San Marino High School. Since 2011, Susanna has been a pianist and a music associate at First Baptist Church of Glendale, facilitating services and contracting musicians for the church. Susanna has been teaching cello privately throughout Southern California since 2010.

Susanna has received her BM in Cello Performance from Azusa Pacific University, and is currently studying with Professor Christopher Russell at Azusa Pacific University and will receive her MM in Instrumental Conducting in May of 2019.

Audio and Music Engineering

Flags

“After School” 1959 Norman Rockwell

Flag Day in the United States, observed on June 14th, commemorates the adoption of the American flag by the Second Continental Congress in 1777. It’s a day to honor the symbol of the nation’s unity, freedom, and democracy. The flag represents the ideals and principles upon which the country was founded, including liberty, justice, and equality.

On Flag Day, Americans typically display the flag at their homes and businesses, participate in patriotic ceremonies, and reflect on the significance of the flag in American history and culture. It’s also a time to remember the sacrifices made by those who have served and continue to serve in defense of the nation. Flag Day serves as a reminder of the values that bind Americans together as one nation, under the banner of the stars and stripes.

Flagpoles

University of Michigan

Hillsdale College Michigan

Western University Ontario

Universitetet i Oslo

Universitetet i Oslo

Northeastern University Massachusetts

University at Buffalo New York

Università Ca’ Foscari Venezia

Pepperdine University / California

Colby College Maine

Finley Public School New South Wales Australia

St. Olaf College Minnesota

College of the Ozarks Missouri

University of Alaska Fairbanks

 

Neuqua Valley High School Illinois

Hillsdale College Michigan

Abilene Christian University Texas

University of Southern Mississippi | Image: Courtland Wells

Québec

Queensborough Community College

Bucknell University Pennsylvania

Flagpoles

 

NB: “The flag stands for a set of principles, not the lack of adherence to them.” ― Craig D. Lounsbrough.  We are not sure about this source; nor the author.  We have adapted the sentiment for our home page excerpt.

Flagpoles

Time & Frequency Services

The National Institute of Standards and Technology is responsible for maintaining and disseminating official time in the United States. While NIST does not have a direct role in implementing clock changes for daylight saving time, it does play an important role in ensuring that timekeeping systems across the country are accurate and consistent.

Prior to the implementation of daylight saving time, NIST issues public announcements reminding individuals and organizations to adjust their clocks accordingly. NIST also provides resources to help people synchronize their clocks, such as the time.gov website and the NIST radio station WWV.

In addition, NIST is responsible for developing and maintaining the atomic clocks that are used to define Coordinated Universal Time (UTC), the international standard for timekeeping. UTC is used as the basis for all civil time in the United States, and it is the reference time used by many systems, including the Global Positioning System (GPS) and the internet.

Overall, while NIST does not have a direct role in implementing clock changes for daylight saving time, it plays an important role in ensuring that timekeeping systems across the country are accurate and consistent, which is essential for the smooth implementation of any changes to the system.

CLICK IMAGE to access complete document

More

Time Realization and Distribution

Horologiorum

Time Synchronization of Medium Voltage Substations

 

Time Synchronization of Medium Voltage Substation IEDs Using Modbus and Python

Joseph Owusu, et. al

 

Abstract:  Energy demand and supply all over the world is increasing in size and complexity. Anomalous conditions caused by failures in electrical components, human errors and environmental conditions result in electrical faults that can interrupt electricity flow. Substation automation requires precise time synchronization for a variety of Intelligent Electronic Devices for fault diagnosis. The quest for accurate and sequential time stamping of events compels power utility companies to adopt various techniques of time synchronization with an accuracy of a millisecond or a microsecond. Some works adopt the use of time synchronization techniques using protocols such as Network Time Protocol, Precision Time protocol, Simple Network Time Protocol and many more. This work presents time synchronization of IEDs using Modbus protocol and python programming language for a local substation. The system records the output data into a database and displays it on an application software. The time synchronization system was successful alternative for off network systems.

 

Related:

Time Synchronization in the Electric Power System

Outdoor Deicing & Snow Melting

“Snow at Argenteuil” | Claude Monet (1875)

Today our focus turns to outdoor electric deicing and snow melting wiring systems identified as suitable for the environment and installed in accordance with the manufacturer’s instructions.  They work silently to keep snow load from caving in roofs and icicles falling from gutters onto pedestrian pathways.

While the voltage and ampere requirement of the product itself is a known characteristic, the characteristic 0f the wiring pathway — voltage, ampere, grounding, short circuit, disconnect and control — is relatively more complicated and worthy of our attention.   Articles 426-427 of the National Electrical Code is the relevant part of the NEC

Free Access 2023 National Electrical Code

Insight into the ideas running through technical committee deliberations is provided by a review of Panel 17 transcripts:

2023 NEC Panel 17 Public Input Report (633 pages)

2023 NEC Panel 17 Public Comment Report (190 pages)

We hold Articles 427 in the middle of our priority ranking for the 2023 NEC.   We find that the more difficult issues for this technology is the determination of which trade specifies these systems — architectural, electrical, or mechanical; covered in previous posts.   Instead, most of our time will be spent getting IEEE consensus products in step with it, specifically ANSI/IEEE 515 and IEEE 844/CSA 293.

Comments on the First Draft of the 2026 NEC will be received until August 28th.

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We collaborate with the IEEE Education & Healthcare Facility Committee which meets online 4 times per month in European and American time zones.  Since a great deal of the technical basis for the NEC originates with the IEEE we will also collaborate with IEEE Standards Coordinating Committee 18 whose members are charged by the IEEE Standards Association to coordinate NFPA and IEEE consensus products.

Issue: [19-151]

Category: Electrical, Energy

Colleagues: Mike Anthony, Jim Harvey, Kane Howard, Jose Meijer


LEARN MORE:

IEEE Standard for the Testing, Design, Installation, and Maintenance of Electrical Resistance Heat Tracing for Commercial Applications

844.2/CSA C293.2-2017 – IEEE/CSA Standard for Skin Effect Trace Heating of Pipelines, Vessels, Equipment, and Structures–Application Guide for Design, Installation, Testing, Commissioning, and Maintenance

 

Stitches, Seams & Stitching

The Intersection of Design and Engineering

Du froid

“Weather is fate”

Charles Louis de Secondat, Baron de La Brède et de Montesquieu

“Road to Versailles at Louveciennes” 1869 Camille Pissarro

Heat tracing is a process used to maintain or raise the temperature of pipes and vessels in order to prevent freezing, maintain process temperature, or ensure that products remain fluid and flow through the system properly.

Heat tracing works by using an electric heating cable or tape that is wrapped around the pipe or vessel, and then insulated to help retain the heat. The heating cable is connected to a power source and temperature control system that maintains the desired temperature by regulating the amount of heat output from the cable. Heat tracing is commonly used in industrial applications where temperature control is critical, such as in chemical plants, refineries, and oil and gas facilities.

There are several types of heat tracing, including electric heat tracing, steam tracing, and hot water tracing, each of which have their own unique advantages and disadvantages. The selection of the appropriate type of heat tracing depends on the specific application and the required temperature range, as well as factors such as cost, maintenance, and safety considerations.

Today we review the literature for snow and ice management (and enjoyment) produced by these standards-setting organizations:

Accredited Snow Contractors Association

American Society of Civil Engineers

American Society of Mechanical Engineers

ASTM International

FM Global

Destructive Deep Freeze Strikes Cold and Hot Regions Alike

Institute of Electrical & Electronic Engineers

Electrical Heat Tracing: International Harmonization — Now and in the Future

International Code Council

International Building Code: Chapter 15 Roof Assemblies and Rooftop Structures

National Electrical Contractors Association

National Fire Protection Association

Winter is Coming: Is Your Facility Protected? (Holly Burgess, November 2022)

National Electrical Code: Articles 426-427

National Floor Safety Institute

Snow and Ice Management Association

Underwriters Laboratories

Manufacturers:

Chromalox Electrical Heat Tracing Systems Design Guide



It is a surprisingly large domain with market-makers in every dimension of safety and sustainability; all of whom are bound by state and federal regulations.

Join us at 16:00 UTC with the login credentials at the upper right of our home page.

There have been several recent innovations that have made it possible for construction activity to continue through cold winter months. Some of the most notable ones include:

  1. Heated Job Site Trailers: These trailers are equipped with heating systems that keep workers warm and comfortable while they take breaks or work on plans. This helps to keep morale up and prevent cold-related health issues.
  2. Insulated Concrete Forms (ICFs): ICFs are prefabricated blocks made of foam insulation that are stacked together to form the walls of a building. The foam insulation provides an extra layer of insulation to keep the building warm during cold winter months.
  3. Warm-Mix Asphalt (WMA): WMA is a type of asphalt that is designed to be used in colder temperatures than traditional hot-mix asphalt. This allows road construction crews to work through the winter months without having to worry about the asphalt cooling and becoming unusable.
  4. Pneumatic Heaters: These heaters are used to warm up the ground before concrete is poured. This helps to prevent the concrete from freezing and becoming damaged during the winter months.
  5. Electrically Heated Mats: These mats are placed on the ground to prevent snow and ice from accumulating. This helps to make the job site safer and easier to work on during the winter months.

Overall, these innovations have made it possible for construction crews to work through the winter months more comfortably and safely, which has helped to keep projects on schedule and minimize delays.

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