Tag Archives: Spring

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Gallery: Dance

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On Hearing the First Cuckoo in Spring

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Spring Equinox

The Earth’s precession is a slow, cyclical motion of the rotational axis that causes the position of the celestial poles to change over time. This motion is caused by the gravitational influence of the Moon and Sun on the Earth’s equatorial bulge, and it has a period of about 26,000 years.

Over astronomical time, the Earth’s precession has caused a number of changes in the position of the stars and constellations in the sky. For example, due to precession, the position of the North Star, or Polaris, has shifted over time, and in ancient times, other stars, such as Thuban, were used as celestial markers for navigation. Additionally, precession can cause changes in the length and timing of the seasons over long timescales.

The Earth’s precession is affected by a number of factors, including the gravitational pull of other planets, the shape of the Earth’s orbit around the Sun, and the distribution of mass within the Earth itself. These factors can cause slight variations in the rate and direction of precession over time.

Overall, while the effects of precession on the Earth’s rotation and position in the sky are not easily observable on human timescales, they are an important component of the Earth’s long-term astronomical behavior.

Gallery: Other Ways of Knowing Climate Change

DRINKING, WASTEWATER & STORMWATER SYSTEMS

“Fille romaine à la fontaine” 1875 Léon Bonnat

Civilization has historically flourished around rivers and major waterways.  Mesopotamia, the so-called cradle of civilization, was situated between the major rivers Tigris and Euphrates; the ancient society of the Egyptians depended entirely upon the Nile. Rome was also founded on the banks of the Italian river Tiber. Large metropolises like Rotterdam, London, Montreal, Paris, New York City, Buenos Aires, Shanghai, Tokyo, Chicago, and Hong Kong owe their success in part to their easy accessibility via water and the resultant expansion of trade. Islands with safe water ports, like Singapore, have flourished for the same reason. In places such as North Africa and the Middle East, where water is more scarce, access to clean drinking water was and is a major factor in human development.*

With this perspective, and our own “home waters” situated in the Great Lakes, we are attentive to water management standardization activity administered by International Organization Standardization Technical Committee 224 (ISO TC/224).  The scope of the committee is multidimensional; as described in the business plan linked below:

BUSINESS PLAN ISO/TC 224

 

Water-related management standards define a very active space; arguably, as fast-moving a space as electrotechnology.   The ISO TC/224 is a fairly well accomplished committee with at least 16 consensus products emerging from a 34 nations led by Association Française de Normalisation (@AFNOR) as the global Secretariat and 34 participating nations.   The American Water Works Association is ANSI’s US Technical Advisory Group administrator to the ISO.

We do not advocate the user interest in this standard at the moment but encourage educational institutions with resident expertise — either on the business side or academic side of US educational institutions — to participate in it.   You are encouraged to communicate directly with Paul Olson at AWWA, 6666 W. Quincy Avenue, Denver, CO 80235, Phone: (303) 347-6178, Email: polson@awwa.org.

The work products of TC 224 (and ISO 147 and  ISO TC 282) are also on the standing agendas of our Water, Global and Bucolia colloquia.  See our CALENDAR for the next online meeting, open to everyone.

Issue: [13-163]

Category: Global, Water

Colleagues: Mike Anthony, Christine Fischer, Jack Janveja. Richard Robben, Larry Spielvogel

Standing Agenda / Water


Qualität der Wasserversorgung

Preserving the Maine Harvest: Freezing Rhubarb and Greens

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Spring Week 20 | May 12 – May 18

17 May | Norwegian Constitution Day 2023


Monday | May 15 | Colloquium 15:00 UTC


Tuesday | May 16 | Colloquium 15:00 UTC


Wednesday | May 17 | Colloquium 15:00 UTC

print (“Hello World!”)


Thursday | May 18 | Colloquium 15:00 UTC


Friday | May 19 | Colloquium 15:00 UTC


Saturday | May 20


Saturday | May 20


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