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Spring Week 18 | April 29 – May 5
Monday | April 29 | Colloquium 15:00 UTC
Tuesday | April 30 | Colloquium 15:00 UTC
Wednesday | May 1| Colloquium 15:00 UTC
Thursday | May 2 | Colloquium 15:00 UTC
Friday | May 3 | Colloquium 15:00 UTC
Saturday | May 4
Sunday | May 5
Spring Week 12 | March 18 – 24
News:
March 22: Government-funded college program for teachers of color accused of discrimination
Readings: US Law Schools Consider Eliminating US Constitution Law Class Requirement
Monday | March 18 | Colloquium 15:00 UTC
Tuesday | March 19 | Colloquium 15:00 UTC
Wednesday | March 20 | Colloquium 15:00 UTC
Thursday | March 21 | Colloquium 15:00 UTC
Friday | March 22 | Colloquium 15:00 UTC
Saturday | March 23
Sunday | March 24
King’s College Cambridge
Morning Has Broken
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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.
Harper Hall: $631 Million
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Leap Year
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The earth makes “one” trip around the Sun in approximately 365.2425 days. An additional day every four years helps synchronizes the calendar year with the solar year — assuming a perfect circle. Alas, the orbit is far from circular — it is elliptical and eccentric — thus confounding assumptions about climate change.
Today we revisit our earlier inquiries, readings and research with some consideration to how computer software deals with a leap year. Use the login credentials at the upper right of our home page.
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Weddings
“Marriage is a duel to the death
which no man should decline”
— G.K. Chesterton
“Wedded” 1882 Lord Frederic Leighton
…”Two are better than one, because they have a good return for their labor.
For if one falls down, his companion can lift him up;
but pity the one who falls without another to help him up!…
– Ecclesiastes 4:9
University of Michigan Botanical Gardens
Vanderbilt University | Davidson County Tennessee
University of Rochester New York
University of Minnesota | Hennepin County
Oxford University
University of Chicago | Cook County
Vanderbilt University | Davidson County Tennessee
Saginaw Valley State University | Saginaw County Michigan
More
“Therefore a man shall leave his father and his mother and hold fast to his wife, and they shall become one flesh” — Genesis 2:24
International Building Code §303.3 Assembly Group A-2
Edge Case: Leap Year
Programming languages face several challenges when dealing with leap years, primarily because leap years don’t follow a simple pattern and can vary depending on the calendar system being used. Some of the challenges include:
Algorithm Complexity: Writing algorithms to accurately determine leap years can be complex due to the various rules governing leap years in different calendar systems. For instance, the Gregorian calendar, which is the most widely used calendar system, has different rules than other systems like the Julian calendar.
Handling Calendar Systems: Some programming languages have built-in libraries or functions to handle leap years, but they may not support all calendar systems. Developers need to ensure that the language’s built-in functions or libraries accurately handle leap years according to the desired calendar system.
Cross-Platform Consistency: Different platforms and programming languages may implement leap year calculations differently, leading to inconsistencies when working with date and time data across different systems.
Localization: Some calendar systems used in various regions have different rules for leap years. Programming languages may need to support localization to handle these differences accurately.
Performance: Implementing leap year calculations efficiently can be challenging, especially when dealing with large datasets or frequent date/time manipulations. Optimizing leap year calculations for performance without sacrificing accuracy is important in high-performance applications.
To address these challenges, programmers often rely on built-in date and time libraries provided by programming languages or use third-party libraries specifically designed to handle calendar-related calculations accurately and efficiently. Additionally, thorough testing and validation of date-related logic are essential to ensure correctness, especially in critical applications.
In Python, leap years can be accounted for using the calendar module or by writing custom logic. The calendar module provides a function called isleap() to check if a given year is a leap year.
Here’s an example of how you can use the calendar module to check if a year is a leap year:
import calendar
year = 2024
if calendar.isleap(year):
print(f”{year} is a leap year.”)
else:
print(f”{year} is not a leap year.”)
Alternatively, you can write custom logic to determine if a year is a leap year. The logic for determining leap years is as follows:
-
- If a year is evenly divisible by 4, it is a leap year.
- However, if the year is evenly divisible by 100, it is not a leap year, unless:
- The year is also evenly divisible by 400, in which case it is a leap year.
Here’s an example of how you can implement this logic in Python without using the calendar module:
def is_leap_year(year):
if year % 4 == 0:
if year % 100 == 0:
if year % 400 == 0:
return True
else:
return False
else:
return True
else:
return Falseprint(f”{year} is a leap year.”)
else:
print(f”{year} is not a leap year.”)
Looking back at 2023 @mikefiedler discovered some impressive metrics that we want to share! @fastly #PyPI #pytho pic.twitter.com/EXfWwduWA9
— Python Package Index (@pypi) February 14, 2024
What is time?
“What then is time? If no one asks me, I know what it is.
If I wish to explain it to him who asks, I do not know.”
Saint Augustine (“Confessions” Book XI)
Starting soon! https://t.co/JL03EIEMqo pic.twitter.com/Ttpp4TA8jr
— Wendy Bohon, PhD 🌏 (@DrWendyRocks) December 28, 2023
“Time flies like an arrow; fruit flies like a banana.” — Groucho Marx
“Time is a great healer, but a terrible beautician.” — Unknown
“Time and tide wait for no man, but time always stands still for a woman of 30.” — Robert Frost
“Time is what we want most, but what we use worst.” — William Penn
“Time is the best teacher; unfortunately, it kills all its students.” — Robin Williams
“Inside every older person is a younger person wondering what happened.” — Jennifer Yane
“Age is an issue of mind over matter. If you don’t mind, it doesn’t matter.” — Mark Twain
“They say time is a great teacher, but unfortunately it kills all its pupils.” — Louis Hector Berlioz
“Middle age is when you’re sitting at home on a Saturday night and the telephone rings, and you hope it isn’t for you.” — Ogden Nash
“The trouble with jogging is that by the time you realize you’re not in shape for it, it’s too far to walk back.” — Franklin P. Jones
“Time is a dressmaker specializing in alterations.” — Faith Baldwin
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/njrDAbSpwB pic.twitter.com/GkAXrHoQ9T
— USPTO (@uspto) July 13, 2023
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