How Many Days Are in a Year?
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Periodization: Who Needs It?
Periodization: Who Needs It? Now that we are into a new calendar year, it’s time to get serious about your training program for the upcoming year. Many cyclists use some sort of training plan. One of the common elements of any training plan is that it is broken into segments, called periods. ‘Periodization’ is the process of developing a training schedule which has varying periods of hard work leading to overload or over- reaching, followed by a recovery period. Typically the year (the macrocycle) is broken into several large cycles, called mesocycles. Joe Friel, author of the Cyclists Training Bible uses the following names for these mesocycles: Preparation, Base, Build, Peak, Race and Transition. The Build, Peak and Race periods may be multiple several times during the racing season. The type of training during each of these is different depending on the time of year. Each of these mesocycles may have one or more cycles of 3-5 week segments. For example, your base period may have three sets of 4 weeks where you build up mileage and intensity for three consecutive weeks and then take the fourth week easier to recover from the previous three hard weeks. The purpose of varying the intensity of your training with periods of rest and recovery is to allow you to reach a higher level of fitness than if you just rode at a steady workload throughout the year. It’s similar to doing intervals, but on a larger scale. Almost every cyclist does some sort of periodization in their training whether they realize it or not. -
Geological Timeline
Geological Timeline In this pack you will find information and activities to help your class grasp the concept of geological time, just how old our planet is, and just how young we, as a species, are. Planet Earth is 4,600 million years old. We all know this is very old indeed, but big numbers like this are always difficult to get your head around. The activities in this pack will help your class to make visual representations of the age of the Earth to help them get to grips with the timescales involved. Important EvEnts In thE Earth’s hIstory 4600 mya (million years ago) – Planet Earth formed. Dust left over from the birth of the sun clumped together to form planet Earth. The other planets in our solar system were also formed in this way at about the same time. 4500 mya – Earth’s core and crust formed. Dense metals sank to the centre of the Earth and formed the core, while the outside layer cooled and solidified to form the Earth’s crust. 4400 mya – The Earth’s first oceans formed. Water vapour was released into the Earth’s atmosphere by volcanism. It then cooled, fell back down as rain, and formed the Earth’s first oceans. Some water may also have been brought to Earth by comets and asteroids. 3850 mya – The first life appeared on Earth. It was very simple single-celled organisms. Exactly how life first arose is a mystery. 1500 mya – Oxygen began to accumulate in the Earth’s atmosphere. Oxygen is made by cyanobacteria (blue-green algae) as a product of photosynthesis. -
A Few Common Misconceptions in Historical Astronomy by Barry D
A Few Common Misconceptions in Historical Astronomy By Barry D. Malpas – Special to the Williams-Grand Canyon News – 2014 September Did Galileo Invent the Telescope? Credit for the invention of the telescope is given to the Dutch lens maker Johann Lippershey (ca. 1570- 1619) in the year 1608, who tried to market them as military devices to the Dutch Government. Galileo, hearing about the invention through his correspondences with other scientists in Europe, built his first telescope in one evening, during the fall of 1609. Galileo too recognized the military significance of the telescope, but he also compre- hended its scientific importance, applying it to the Moon and planets, hence expanding humankind's understanding of the Universe. This use advanced astronomy as a modern science and provided its most important research instrument. Has Polaris Always Been the North Star? As the Earth spins on its axis like a giant top, it also slowly wobbles like one, completing one cycle in a period of about 26,000 years. This circular wobble is known as Precession, and is the movement of the direction in the sky to where the Earth’s axis points. At present, it points very close to the star Polaris. However, 5,000 years ago when Stonehenge in England and the Great Pyramid at Giza, Egypt, were being constructed, the Earth’s north polar axis pointed to Thuban, a star in the constellation Draco. About 12,000 years from now the axis will circle its way around towards the bright star Vega, in the constellation Lyra. (Note both Thuban and Vega on the sky chart.) Was the Earth Considered Flat When Columbus Discovered the New World? This misconception was generally true for the unschooled masses, but not so for anyone who had received an education. -
The Mathematics of the Chinese, Indian, Islamic and Gregorian Calendars
Heavenly Mathematics: The Mathematics of the Chinese, Indian, Islamic and Gregorian Calendars Helmer Aslaksen Department of Mathematics National University of Singapore [email protected] www.math.nus.edu.sg/aslaksen/ www.chinesecalendar.net 1 Public Holidays There are 11 public holidays in Singapore. Three of them are secular. 1. New Year’s Day 2. Labour Day 3. National Day The remaining eight cultural, racial or reli- gious holidays consist of two Chinese, two Muslim, two Indian and two Christian. 2 Cultural, Racial or Religious Holidays 1. Chinese New Year and day after 2. Good Friday 3. Vesak Day 4. Deepavali 5. Christmas Day 6. Hari Raya Puasa 7. Hari Raya Haji Listed in order, except for the Muslim hol- idays, which can occur anytime during the year. Christmas Day falls on a fixed date, but all the others move. 3 A Quick Course in Astronomy The Earth revolves counterclockwise around the Sun in an elliptical orbit. The Earth ro- tates counterclockwise around an axis that is tilted 23.5 degrees. March equinox June December solstice solstice September equinox E E N S N S W W June equi Dec June equi Dec sol sol sol sol Beijing Singapore In the northern hemisphere, the day will be longest at the June solstice and shortest at the December solstice. At the two equinoxes day and night will be equally long. The equi- noxes and solstices are called the seasonal markers. 4 The Year The tropical year (or solar year) is the time from one March equinox to the next. The mean value is 365.2422 days. -
Capricious Suntime
[Physics in daily life] I L.J.F. (Jo) Hermans - Leiden University, e Netherlands - [email protected] - DOI: 10.1051/epn/2011202 Capricious suntime t what time of the day does the sun reach its is that the solar time will gradually deviate from the time highest point, or culmination point, when on our watch. We expect this‘eccentricity effect’ to show a its position is exactly in the South? e ans - sine-like behaviour with a period of a year. A wer to this question is not so trivial. For ere is a second, even more important complication. It is one thing, it depends on our location within our time due to the fact that the rotational axis of the earth is not zone. For Berlin, which is near the Eastern end of the perpendicular to the ecliptic, but is tilted by about 23.5 Central European time zone, it may happen around degrees. is is, aer all, the cause of our seasons. To noon, whereas in Paris it may be close to 1 p.m. (we understand this ‘tilt effect’ we must realise that what mat - ignore the daylight saving ters for the deviation in time time which adds an extra is the variation of the sun’s hour in the summer). horizontal motion against But even for a fixed loca - the stellar background tion, the time at which the during the year. In mid- sun reaches its culmination summer and mid-winter, point varies throughout the when the sun reaches its year in a surprising way. -
Ocean Data Standards
Manuals and Guides 54 Ocean Data Standards Volume 2 Recommendation to Adopt ISO 8601:2004 as the Standard for the Representation of Date and Time in Oceanographic Data Exchange UNESCO Manuals and Guides 54 Ocean Data Standards Volume 2 Recommendation to Adopt ISO 8601:2004 as the Standard for the Representation of Date and Time in Oceanographic Data Exchange UNESCO 2011 IOC Manuals and Guides, 54, Volume 2 Version 1 January 2011 For bibliographic purposes this document should be cited as follows: Paris. Intergovernmental Oceanographic Commission of UNESCO. 2011.Ocean Data Standards, Vol.2: Recommendation to adopt ISO 8601:2004 as the standard for the representation of dates and times in oceanographic data exchange.(IOC Manuals and Guides, 54, Vol. 2.) 17 pp. (English.)(IOC/2011/MG/54-2) © UNESCO 2011 Printed in France IOC Manuals and Guides No. 54 (2) Page (i) TABLE OF CONTENTS page 1. BACKGROUND ......................................................................................................................... 1 2. DATE AND TIME FOR DATA EXCHANGE ......................................................................... 1 3. INTERNATIONAL STANDARD ISO 8601:2004 .............................................................. 1 4. DATE AND TIME REPRESENTATION................................................................................ 2 4.1 Date ................................................................................................................................................. 2 4.2 Time ............................................................................................................................................... -
Ovid, Fasti 1.63-294 (Translated By, and Adapted Notes From, A
Ovid, Fasti 1.63-294 (translated by, and adapted notes from, A. S. Kline) [Latin text; 8 CE] Book I: January 1: Kalends See how Janus1 appears first in my song To announce a happy year for you, Germanicus.2 Two-headed Janus, source of the silently gliding year, The only god who is able to see behind him, Be favourable to the leaders, whose labours win Peace for the fertile earth, peace for the seas: Be favourable to the senate and Roman people, And with a nod unbar the shining temples. A prosperous day dawns: favour our thoughts and speech! Let auspicious words be said on this auspicious day. Let our ears be free of lawsuits then, and banish Mad disputes now: you, malicious tongues, cease wagging! See how the air shines with fragrant fire, And Cilician3 grains crackle on lit hearths! The flame beats brightly on the temple’s gold, And spreads a flickering light on the shrine’s roof. Spotless garments make their way to Tarpeian Heights,4 And the crowd wear the colours of the festival: Now the new rods and axes lead, new purple glows, And the distinctive ivory chair feels fresh weight. Heifers that grazed the grass on Faliscan plains,5 Unbroken to the yoke, bow their necks to the axe. When Jupiter watches the whole world from his hill, Everything that he sees belongs to Rome. Hail, day of joy, and return forever, happier still, Worthy to be cherished by a race that rules the world. But two-formed Janus what god shall I say you are, Since Greece has no divinity to compare with you? Tell me the reason, too, why you alone of all the gods Look both at what’s behind you and what’s in front. -
The Evolution of the Roman Calendar Dwayne Meisner, University of Regina
The Evolution of the Roman Calendar Dwayne Meisner, University of Regina Abstract The Roman calendar was first developed as a lunar | 290 calendar, so it was difficult for the Romans to reconcile this with the natural solar year. In 45 BC, Julius Caesar reformed the calendar, creating a solar year of 365 days with leap years every four years. This article explains the process by which the Roman calendar evolved and argues that the reason February has 28 days is that Caesar did not want to interfere with religious festivals that occurred in February. Beginning as a lunar calendar, the Romans developed a lunisolar system that tried to reconcile lunar months with the solar year, with the unfortunate result that the calendar was often inaccurate by up to four months. Caesar fixed this by changing the lengths of most months, but made no change to February because of the tradition of intercalation, which the article explains, and because of festivals that were celebrated in February that were connected to the Roman New Year, which had originally been on March 1. Introduction The reason why February has 28 days in the modern calendar is that Caesar did not want to interfere with festivals that honored the dead, some of which were Past Imperfect 15 (2009) | © | ISSN 1711-053X | eISSN 1718-4487 connected to the position of the Roman New Year. In the earliest calendars of the Roman Republic, the year began on March 1, because the consuls, after whom the year was named, began their years in office on the Ides of March. -
Islamic Calendar from Wikipedia, the Free Encyclopedia
Islamic calendar From Wikipedia, the free encyclopedia -at اﻟﺘﻘﻮﻳﻢ اﻟﻬﺠﺮي :The Islamic, Muslim, or Hijri calendar (Arabic taqwīm al-hijrī) is a lunar calendar consisting of 12 months in a year of 354 or 355 days. It is used (often alongside the Gregorian calendar) to date events in many Muslim countries. It is also used by Muslims to determine the proper days of Islamic holidays and rituals, such as the annual period of fasting and the proper time for the pilgrimage to Mecca. The Islamic calendar employs the Hijri era whose epoch was Islamic Calendar stamp issued at King retrospectively established as the Islamic New Year of AD 622. During Khaled airport (10 Rajab 1428 / 24 July that year, Muhammad and his followers migrated from Mecca to 2007) Yathrib (now Medina) and established the first Muslim community (ummah), an event commemorated as the Hijra. In the West, dates in this era are usually denoted AH (Latin: Anno Hegirae, "in the year of the Hijra") in parallel with the Christian (AD) and Jewish eras (AM). In Muslim countries, it is also sometimes denoted as H[1] from its Arabic form ( [In English, years prior to the Hijra are reckoned as BH ("Before the Hijra").[2 .(ﻫـ abbreviated , َﺳﻨﺔ ﻫِ ْﺠﺮﻳّﺔ The current Islamic year is 1438 AH. In the Gregorian calendar, 1438 AH runs from approximately 3 October 2016 to 21 September 2017.[3] Contents 1 Months 1.1 Length of months 2 Days of the week 3 History 3.1 Pre-Islamic calendar 3.2 Prohibiting Nasī’ 4 Year numbering 5 Astronomical considerations 6 Theological considerations 7 Astronomical -
Day-Ahead Market Enhancements Phase 1: 15-Minute Scheduling
Day-Ahead Market Enhancements Phase 1: 15-minute scheduling Phase 2: flexible ramping product Stakeholder Meeting March 7, 2019 Agenda Time Topic Presenter 10:00 – 10:10 Welcome and Introductions Kristina Osborne 10:10 – 12:00 Phase 1: 15-Minute Granularity Megan Poage 12:00 – 1:00 Lunch 1:00 – 3:20 Phase 2: Flexible Ramping Product Elliott Nethercutt & and Market Formulation George Angelidis 3:20 – 3:30 Next Steps Kristina Osborne Page 2 DAME initiative has been split into in two phases for policy development and implementation • Phase 1: 15-Minute Granularity – 15-minute scheduling – 15-minute bidding • Phase 2: Day-Ahead Flexible Ramping Product (FRP) – Day-ahead market formulation – Introduction of day-ahead flexible ramping product – Improve deliverability of FRP and ancillary services (AS) – Re-optimization of AS in real-time 15-minute market Page 3 ISO Policy Initiative Stakeholder Process for DAME Phase 1 POLICY AND PLAN DEVELOPMENT Issue Straw Draft Final June 2018 July 2018 Paper Proposal Proposal EIM GB ISO Board Implementation Fall 2020 Stakeholder Input We are here Page 4 DAME Phase 1 schedule • Third Revised Straw Proposal – March 2019 • Draft Final Proposal – April 2019 • EIM Governing Body – June 2019 • ISO Board of Governors – July 2019 • Implementation – Fall 2020 Page 5 ISO Policy Initiative Stakeholder Process for DAME Phase 2 POLICY AND PLAN DEVELOPMENT Issue Straw Draft Final Q4 2019 Q4 2019 Paper Proposal Proposal EIM GB ISO Board Implementation Fall 2021 Stakeholder Input We are here Page 6 DAME Phase 2 schedule • Issue Paper/Straw Proposal – March 2019 • Revised Straw Proposal – Summer 2019 • Draft Final Proposal – Fall 2019 • EIM GB and BOG decision – Q4 2019 • Implementation – Fall 2021 Page 7 Day-Ahead Market Enhancements Third Revised Straw Proposal 15-MINUTE GRANULARITY Megan Poage Sr. -
2020 Report of the 2019 Committee to Review the Academic Calendar
Report of the 2019 Committee to Review the Academic Calendar Executive Summary .................................................................................................................... 2 Introduction................................................................................................................................ 5 The Committee ................................................................................................................................... 5 The work of the Committee ................................................................................................................ 5 History of the academic calendar at UChicago .................................................................................... 7 The 2019 landscape ............................................................................................................................ 8 Table 1: Comparison of doctoral student populations, AY97 and AY18........................................................... 9 Table 2. Comparison of faculty at the ranks of Assistant, Associate, and Professor, AY97 and AY18 ................ 9 Stakeholders and Findings........................................................................................................ 10 Excursus 1. Student mental health ................................................................................................... 13 Excursus 2: Leaves-of-absence ......................................................................................................... -
2021-2022 School Year Calendar June 2021 June 21-July 29 - Summer School 17 - Martin Luther King Jr
2021-2022 School Year Calendar June 2021 June 21-July 29 - Summer school 17 - Martin Luther King Jr. Day January 2022 (Fridays off) S M T W T F S 27 - Second Quarter Ends S M T W T F S 1 2 3 4 5 28 - Teacher Record Keeping Day 1 6 7 8 9 10 11 12 31 - Third Quarter Begins 2 3 4 5 6 7 8 13 14 15 16 17 18 19 9 10 11 12 13 14 15 20 21 22 23 24 25 26 16 17 18 19 20 21 22 27 28 29 30 23 24 25 26 27 28 29 30 31 July 2021 4 - Independence Day S M T W T F S June 21-July 29 - Summer school 21 - Presidents Day February 2022 (Fridays off) 1 2 3 22 - Parent Teacher Conferences S M T W T F S 4 5 6 7 8 9 10 1 2 3 4 5 11 12 13 14 15 16 17 6 7 8 9 10 11 12 18 19 20 21 22 23 24 13 14 15 16 17 18 19 25 26 27 28 29 30 31 20 21 22 23 24 25 26 27 28 August 2021 19-20 - New Teacher Orientation* S M T W T F S Aug. 23-Sept. 3 - Teacher Prep/PD Days* 31 - Third Quarter Ends March 2022 1 2 3 4 5 6 7 S M T W T F S 8 9 10 11 12 13 14 1 2 3 4 5 15 16 17 18 19 20 21 6 7 8 9 10 11 12 22 23 24 25 26 27 28 13 14 15 16 17 18 19 29 30 31 20 21 22 23 24 25 26 27 28 29 30 31 September 2021 Aug.