Saying "Merry X-mas" like a Mathematician


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Tai Chi Chuan—Directional Instructions

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If you plan to learn Tai-Chi by watching video  without teacher's help, one of the difficult parts is to learn in which direction you should face in the exercise. In this article, I will try to help by providing directional guidance. Clock-Facing Position Whatever position you take at the start of the form (or whatever direction the center of your chest and navel face) consider that starting position to be facing the 12 o'clock position . [2] When the center of your chest and navel face the 12 o'clock position, your right side faces 3 o'clock , your back side faces 6 o'clock , and your left side faces 9 o'clock . Movements In  Yang-Style Tai Chi Chuan , it is composed of 24 forms. Starting at the starting position facing 12 o'clock, you move from right to left and then left to right on approximately a line as shown in the diagram. When you finish, your final position will face 12 o'clock again. From below, please f...
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Yang-Style Tai Chi Chuan 24 Forms

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Attention: Click  here  to view a mobile-friendly version. Health Benefits Tai Chi is often described as “ meditation in motion ,” but it might well be called “ medication in motion .” As you move, you breathe deeply and naturally, focusing your attention — as in some kinds of meditation — on your bodily sensations.  You can read [16] to learn its health benefits. Video 1.   24 Tai Chi video with English subtitles and narrations (YouTube link ) Movements In Yang-Style Tai Chi Chuan , it is composed of 24 forms. Starting at the starting position facing front, you move from right to left and then left to right on approximately a line as shown in the diagram (see [ 12 ] to learn in which direction you should face with each form). When you finish, your final position is about one step to the left of your starting position. So, if you have a free space of roughly 20 feet x 6 feet, you can practice it. Commencing (Qǐshì, 起势), Prep...
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Shingles Vaccination in 2026: Shingrix's Proven Benefits

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Updated January 2026 with the latest research from 2024 –2025 studies Shingrix: A New Era in Shingles Prevention and Systemic Health The landscape of adult immunization shifted dramatically in 2017 with the introduction of a powerhouse vaccine that redefined expectations for efficacy. Beyond simply preventing painful skin eruptions, recent clinical insights suggest Shingrix® may offer broader protective benefits for both neurological and cardiovascular health: A Leap in Efficacy : Licensed by the FDA in October 2017 for adults 50 and older, Shingrix® boasts an impressive efficacy rate exceeding 90%, vastly outperforming its predecessor. [4] The Gold Standard Protocol : To ensure maximum immunity, the CDC advises a two-dose series, with the second shot administered two to six months after the first. Official Preference : In late 2017, the ACIP officially designated Shingrix® as the preferred vaccine, even for those who had already been immunized with the older version. Phasing Out the ...
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