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Reflections / John Nash

“Non-Cooperative Games” 1951 | John Nash

Brian Keating: Cosmology, Astrophysics, Aliens & Losing the Nobel Prize

 

History of Western Civilization Told Through the Acoustics of its Worship Spaces

 

Abstract.  Insights into the history and future of western civilization are found by applying information theory to the acoustical communication channel (ACC) of its worship spaces. Properties of the ACC have both influenced and reflected the choice of message coding (e.g., speech or music) at various times. Speech coding is efficient for acoustically dry ACCs, but hopeless for highly time-dispersive ACCs. Music coding is appropriate for time dispersive (reverberant) ACCs. The ACCs of synagogues, early Christian house churches, and many Protestant churches are relatively acoustically “dry” and thus well suited to spoken liturgies.

The spoken liturgy, dominant in synagogues, was carried over to early Christian churches, but became unworkable in Constantinian cathedrals and was largely replaced with a musical liturgy. After a millennium, the cathedral acoustic was altered to suit the doctrinal needs of reformation churches with its renewed emphasis on the spoken word. Worship forms continue to change, and the changes are reflected in the properties of the ACC. The pulpits of electronic churches may be evolving into radio and television performance spaces and naves into worshipers’ living rooms.

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Evensong “How Do You Keep the Music Playing?”

Sacred Spaces

National Youth Choir of Scotland “Love Divine”

Fashion Technology

Art presents a different way of looking at things than science; 

one which preserves the mystery of things without undoing the mystery.

— Sir Roger Scruton






Garment Industry Standards

Gallery: School Uniforms

Textiles

Art, Design & Fashion Studios

Watersport

Athletic Competition Timing Standards

Today we update our understanding of best practice catalogs for outdoor and indoor watersport; primarily swimming and rowing.  Use the login credentials at the upper right of our home page.

Natatoriums 300: Advanced Topics

Sapienza – Università di Roma

USA Swimming and the National Collegiate Athletic Association Swimming are two distinct organizations that oversee different aspects of competitive swimming in the United States. USA Swimming governs competitive swimming in the United States across all age groups and skill levels, while NCAA Swimming specifically focuses on collegiate-level swimming and diving competitions within the NCAA framework. Both organizations play crucial roles in the development and promotion of swimming in the United States.

Governing Body:

USA Swimming is the national governing body for the sport of swimming in the United States. It is responsible for overseeing competitive swimming at all levels, from grassroots programs to elite national and international competitions.
NCAA Swimming: NCAA Swimming is part of the National Collegiate Athletic Association (NCAA), which governs intercollegiate sports in the United States. NCAA Swimming specifically deals with collegiate-level swimming competitions among universities and colleges.

Scope:

USA Swimming is responsible for organizing and regulating competitive swimming for all age groups and skill levels, from youth swimmers to Masters swimmers (adults). It oversees swim clubs, hosts competitions, and develops national teams for international events.
NCAA Swimming: NCAA Swimming focuses exclusively on college-level swimming and diving competitions. It sets the rules and guidelines for swimming and diving programs at NCAA member institutions.

Membership:

Individuals, swim clubs, and teams can become members of USA Swimming, allowing them to participate in USA Swimming-sanctioned events, access coaching resources, and benefit from the organization’s development programs.
NCAA Swimming: NCAA Swimming is composed of collegiate athletes who compete for their respective universities and colleges. Athletes are typically student-athletes who represent their schools in NCAA-sanctioned competitions.

Competition Format:

USA Swimming hosts a wide range of competitions, including local, regional, and national meets, as well as Olympic Trials and international events. Swimmers compete as individuals, representing their swim clubs or teams.
NCAA Swimming: NCAA Swimming primarily consists of dual meets, invitational meets, and conference championships at the collegiate level. Swimmers represent their respective universities or colleges, earning points for their teams in dual meets and competing for conference and national titles.

Scholarships:

USA Swimming itself does not offer scholarships. Scholarships for competitive swimmers are typically awarded by colleges and universities based on an athlete’s performance and potential.
NCAA Swimming: NCAA member institutions offer scholarships to talented student-athletes in various sports, including swimming. These scholarships can cover tuition, room, board, and other expenses, making NCAA swimming an avenue for athletes to receive financial support for their education.

 


 

Swimming, Water Polo and Diving Lighting

Steeplechase Water Jump

The steeplechase event requires a combination of speed, endurance, and jumping ability, as athletes must clear the barriers while maintaining their pace and negotiating the water jump. The rules and specifications for the steeplechase event are set by the International Association of Athletics Federations the governing body for the sport of athletics (track and field) worldwide; with minor adaptations by the NCAA for intercollegiate competition.

Emma Coburn | University of Colorado Boulder

The steeplechase is a distance race with barriers and a water pit that athletes must clear during the race.  According to the NCAA Track and Field and Cross Country rulebook, the standards for the steeplechase water jump are as follows:

  1. Length: The water pit must be at least 3.66 meters (12 feet) long.
  2. Width: The water pit must be at least 3.66 meters (12 feet) wide.
  3. Depth: The water pit must have a minimum depth of 0.7 meters (2 feet 4 inches) and a maximum depth of 0.9 meters (2 feet 11 inches).
  4. Slope: The slope of the water pit must not exceed 1:5, meaning that for every 5 meters in length, the water pit can rise by no more than 1 meter in height.
  5. Barrier: The water pit must be preceded by a solid barrier that is 91.4 cm (3 feet) high. Athletes are required to clear this barrier before landing in the water pit.

These standards may be subject to change and may vary depending on the specific NCAA division (Division I, Division II, or Division III) and other factors such as venue requirements. Therefore, it’s always best to refer to the official NCAA rules and regulations for the most up-to-date and accurate information on the steeplechase water jump standards in NCAA competitions.

ASTM F 2157-09 (2018) Standard Specification for Synthetic Surfaced Running Tracks
This specification establishes the minimum performance requirements and classification when tested in accordance with the procedures outlined within this specification. All documents referencing this specification must include classification required.

ASTM F 2569-11 Standard Test Method for Evaluating the Force Reduction Properties of Surfaces for Athletic Use
This test method covers the quantitative measurement and normalization of impact forces generated through a mechanical impact test on an athletic surface. The impact forces simulated in this test method are intended to represent those produced by lower extremities of an athlete during landing events on sport or athletic surfaces.

ASTM F 2949-12 Standard Specification for Pole Vault Box Collars
This specification covers minimum requirements of size, physical characteristics of materials, standard testing procedures, labeling and identification of pole vault box collars.

ASTM F 1162/F1162M-18 Standard Specification for Pole Vault Landing Systems
This specification covers minimum requirements of size, physical characteristics of materials, standard testing procedures, labeling and identification of pole vault landing systems.

ASTM F 2270-12 (2018) Standard Guide for Construction and Maintenance of Warning Track Areas on Sports Fields
This guide covers techniques that are appropriate for the construction and maintenance of warning track areas on sports fields. This guide provides guidance for the selection of materials, such as soil and sand for use in constructing or reconditioning warning track areas and for selection of management practices that will maintain a safe and functioning warning track.

ASTM F 2650-17e1 Standard Terminology Relating to Impact Testing of Sports Surfaces and Equipment
This terminology covers terms related to impact test methods and impact attenuation specifications of sports equipment and surfaces.

Sports Equipment & Surfaces

Exploring the impacts of elite youth sports on family life

Taylor & Francis Online

Mona Mirehie | Department of Tourism, Event & Sport Management, School of Health and Human Sciences

 

Purpose: This study explored the impacts of elite-level youth sport participation on family life.

Methodology: In-depth semi-structured interviews were conducted with parents of youth athletes (N = 17).

Findings: Parents extensively talked about the temporal demands of elite youth sports and necessity of time management. Three domains were found in parents’ accounts including, children’s time, parents’ time, and family’s time; temporal opportunities and challenges were identified within each domain. Time spent on sports was perceived positively, keeping children out of trouble and from video games/time online; however, it left no time for other activities. Although parents sacrificed their own activities to facilitate their child’s sports participation, they used the practice and tournament time to engage in personal interests, such as reading or exercising. Likewise, family’s time was restricted by youth sport schedules, but parents managed to turn car rides or tournament trips into quality family time.

Practical implications: Findings can be used by youth sport practitioners to enhance children and parents’ experiences.

Research contribution: Findings contribute to the literature by assessing the impacts of elite-level youth sports participation on family life.

Originality: The intricacies of how time-on task relates to parents’ relationship with their child’s sport have been understudied.

Standards Indiana

Abiit sed non oblitus

Standards Illinois

Structures

9-11 Commission

Today we examine best practice literature for education building structures developed by accredited and consortia standards developers such as ASCE, ACI, AISC, ASTM, AWS, CRSI, ICC, NFPA and IEEE.   The US education industry among the top three largest building construction markets; with annual new and renovated building construction running close to $100 billion annually.

We limit our coverage to low-risk regions in the US, such as areas with minimal seismic activity, low risk of flooding and moderate weather conditions.  Another huge topic which we will likely break up into separate modules in the fullness of time.  For now, we sweep through the basics:

Foundation

  1. Site Analysis:
    • Conduct soil testing to determine its bearing capacity and composition.
    • Ensure the site is properly graded and drained to prevent water accumulation.
  2. Foundation Type:
    • Slab-on-Grade: Common in residential buildings. A concrete slab is poured directly on the ground.
    • Basement: Provides additional living space and storage, common in residential buildings.
  3. Design and Preparation:
    • Use rebar reinforcement to strengthen the concrete.
    • Install vapor barriers to prevent moisture from seeping through the foundation.
    • Properly compact the soil to prevent settling and shifting.
  4. Concrete Pouring:
    • Use high-quality concrete mix suitable for the local climate.
    • Ensure proper curing of the concrete to achieve maximum strength.
    • Use expansion joints to accommodate temperature changes and prevent cracking.
  5. Waterproofing and Insulation:
    • Apply waterproofing membranes or coatings to protect the foundation from water damage.
    • Insulate the foundation to improve energy efficiency and prevent frost heave in colder climates.

Ironwork

  1. Materials:
    • Use high-quality steel that meets industry standards (e.g., ASTM specifications).
    • Ensure the steel is properly treated to resist corrosion, especially in humid or coastal areas.
  2. Design:
    • Follow structural engineering guidelines and building codes for the specific type of building.
    • Use appropriate load calculations to determine the size and placement of steel beams, columns, and reinforcements.
  3. Fabrication and Assembly:
  4. Erection:
    • Use proper lifting equipment and techniques to safely erect steel structures.
    • Align and level steel components accurately before final fastening.
    • Use bolted connections where possible for ease of assembly and future maintenance.
  5. Inspection and Quality Control:
    • Conduct regular inspections throughout the construction process to ensure compliance with design specifications and building codes.
    • Perform non-destructive testing (e.g., ultrasonic testing) on critical welds and connections.
  6. Protective Coatings:
    • Apply protective coatings (e.g., galvanization, epoxy paint) to steel components to prevent corrosion.
    • Maintain the protective coatings over the lifespan of the building.

Use the login credentials at the upper right of our home page.

 

Related:

Category Archive

Post 9-11 Standards

Following the September 11, 2001 attacks on the World Trade Center, U.S. standards developers — the International Code Council (ICC) and the National Fire Protection Association (NFPA) topmost among them — responded with revisions to technical standards based on thirty findings of the National Institute of Standards and Technology (NIST). These changes aimed to enhance structural integrity, fire safety, and evacuation procedures in high-rise buildings.

Increased Structural Robustness: Codes were updated to improve resistance to progressive collapse, where the failure of one structural element spreads to others. This included increasing the minimum thickness of steel beams and columns and adding more connections between structural elements.

Concrete Reinforcement: Structures like One World Trade Center adopted reinforced concrete cores and thicker structural elements to withstand extreme events.

Fire SafetyEnhanced Fire Resistance: Higher standards for fire-resistant materials were introduced, including mandates for fire sprinklers and smoke alarms in high-rise buildings.

Fire Protection Systems: Improved requirements for active fire protection systems, such as sprinklers, to mitigate fire spread.

Egress and EvacuationElevator Requirements: Elevators are now required in high-rise buildings over 120 feet tall to aid firefighters in accessing upper floors without climbing stairs with heavy equipment.

Additional Stairways: High-rises over 420 feet must include an extra stairway to ensure multiple egress paths.

Exit Path Markings: Self-luminous or photoluminescent exit path markings were mandated to guide occupants to exits during low-visibility emergencies, applied to both new and existing high-rise buildings.

Increased Exit Spacing: Exit enclosures must be spaced farther apart to prevent a single event, like a fire, from blocking multiple exits.

Emergency Communication and PreparednessImproved Communication Systems: Codes now require better communication systems for emergency responders to coordinate during crises, addressing the breakdown in communication during 9/11.

Evacuation Procedures: Elevators can now be used for evacuation in some fire scenarios, a shift from the traditional reliance on stairs, improving evacuation efficiency.

Blast-Resistant Features: Designs for high-profile buildings, like One World Trade Center, incorporated blast-resistant bases (e.g., a 185-foot concrete base) to protect against street-level attacks.

Changes were debated to balance safety with construction costs, with some measures (like exit markings) having minimal cost but significant benefits.  Not all proposals were adopted due to cost concerns or feasibility, but they spurred further structural design advancements.  These changes reflect a shift toward designing buildings to withstand extreme, unpredictable events like terrorist attacks, beyond traditional natural disaster scenarios.

Our work in the NFPA catalog | Our work in the ICC catalog | Our work in the ASCE catalog

Human Factors Using Elevators in Emergency Evacuation

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