Time & the Technosphere
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Durham E-Theses
Durham E-Theses First visibility of the lunar crescent and other problems in historical astronomy. Fatoohi, Louay J. How to cite: Fatoohi, Louay J. (1998) First visibility of the lunar crescent and other problems in historical astronomy., Durham theses, Durham University. Available at Durham E-Theses Online: http://etheses.dur.ac.uk/996/ Use policy The full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that: • a full bibliographic reference is made to the original source • a link is made to the metadata record in Durham E-Theses • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders. Please consult the full Durham E-Theses policy for further details. Academic Support Oce, Durham University, University Oce, Old Elvet, Durham DH1 3HP e-mail: [email protected] Tel: +44 0191 334 6107 http://etheses.dur.ac.uk me91 In the name of Allah, the Gracious, the Merciful >° 9 43'' 0' eji e' e e> igo4 U61 J CO J: lic 6..ý v Lo ý , ý.,, "ý J ýs ýºý. ur ý,r11 Lýi is' ý9r ZU LZJE rju No disaster can befall on the earth or in your souls but it is in a book before We bring it into being; that is easy for Allah. In order that you may not grieve for what has escaped you, nor be exultant at what He has given you; and Allah does not love any prideful boaster. -
Quarterly Bulletin, Q2
I II © Da Afghanistan Bank, 2009 Ibn-e-Sina Watt Kabul Afghanistan Telephone: +93-20-2100293 Internet: www.centralbank.gov.af Email: [email protected] All rights reserved First printing January 2009 1 2 3 4 5 10 09 08 07 Rights and permissions The material in this publication is copyrighted but may be freely quoted and reprinted. Acknowledgement is requested together with a copy of the publication. Data Notes Afghanistan uses the Persian calendar also known as the Jalali calendar, which was introduced on March 15, 1079 by the Seljuk Sultan Jalal-u-ddin Malik Shah I, based on the recommendations of a committee of astronomers, including Omar Khaiyam, at the imperial observatory in his capital city of Isfahan. It is a solar calendar in which each year begins on March 21. This Quarterly Bulletin covers developments in the second quarter 1387 which is equivalent June 22, 2008 – September 21, 2008 in the Gregorian calendar. Afghanistan figures are in current Afghani unless otherwise specified. Billion means 1,000 million III TABLE OF CONTENT Message of the Governor.......................................................................................................VIII THE INTERNATIONAL ECONOMIC ENVIRONMENT .....................................................................1 SUMMARY ...............................................................................................................................1 1. UNITED STATES..................................................................................................................1 -
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. -
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 -
Calendrical Calculations: Third Edition
Notes and Errata for Calendrical Calculations: Third Edition Nachum Dershowitz and Edward M. Reingold Cambridge University Press, 2008 4:00am, July 24, 2013 Do I contradict myself ? Very well then I contradict myself. (I am large, I contain multitudes.) —Walt Whitman: Song of Myself All those complaints that they mutter about. are on account of many places I have corrected. The Creator knows that in most cases I was misled by following. others whom I will spare the embarrassment of mention. But even were I at fault, I do not claim that I reached my ultimate perfection from the outset, nor that I never erred. Just the opposite, I always retract anything the contrary of which becomes clear to me, whether in my writings or my nature. —Maimonides: Letter to his student Joseph ben Yehuda (circa 1190), Iggerot HaRambam, I. Shilat, Maaliyot, Maaleh Adumim, 1987, volume 1, page 295 [in Judeo-Arabic] Cuiusvis hominis est errare; nullius nisi insipientis in errore perseverare. [Any man can make a mistake; only a fool keeps making the same one.] —Attributed to Marcus Tullius Cicero If you find errors not given below or can suggest improvements to the book, please send us the details (email to [email protected] or hard copy to Edward M. Reingold, Department of Computer Science, Illinois Institute of Technology, 10 West 31st Street, Suite 236, Chicago, IL 60616-3729 U.S.A.). If you have occasion to refer to errors below in corresponding with the authors, please refer to the item by page and line numbers in the book, not by item number. -
The 100 Years Anglo-Chinese Calendar, 1St Jan. 1776 to 25Th Jan
: THE 100 YEARS ANGLO-CHINESE CALENDAR, 1st JAN., 1776 to 25th JAN., 187G, CORRESPONDING WITH THE 11th DAY of the 11th MOON of the 40th YEAR of the EEIGN KIEN-LUNG, To the END of the 14th YEAR of the REIGN TUNG-CHI; TOGETIIER WITH AN APPENDIX, CONTAINING SEVERAL INTERESTING TABLES AND EXTRACTS. BY IP. LOUE;EIE,0. SHANGHAI rRINTED AT THE " NORTH-CHINA HERALD " OFFICE, 1872. -A c^ V lo ; ; PREFACE. In presenting the 100 Years Anglo-Chinese Calendar to the public, the compiler claims no originality for his work, inasmuch as, since the year 1832,* Calendars in somewhat similar form have been yearly issued from the press in China ; but, as it is doubtful if a complete series of these exists, and as, in the transaction of business, whether official, legal or commercial, between Foreigners and Chinese, and in the study of Chinese History which is now so intimately connected with foreign nations, a knowledge of the corresponding dates is quite necessary, it is hoped that this compilation will be found useful, and especially so in referring to the date of past events, and in deciding the precise day, according to the Chinese and Chris- tian Calendars, on which they occurred. Commencing with the last quarter of the past century (1st January, 1776), the Calendar embraces the peiiod when the first British Embassy (Lord Macartney's in 1793) arrived in China. For convenience sake the Calendar has been divided into 10 parts, each embracing a period of ten years of the Christian era and ends with the close of the 14th year of the present reign Tung-chi, —the 25th January, 1876. -
Gangale 2000 the MARTIAN TIME POLL: ONE MARTIAN YEAR OF
Gangale_2000 THE MARTIAN TIME POLL: ONE MARTIAN YEAR OF DATA Thomas Gangale* And Marilyn Dudley-Rowley** ABSTRACT The design of a Martian timekeeping system must be as much a social construct as an astronomical one if it is to gain wide acceptance within the Martian community. Not only must such a system accurately mark the passage of the Martian diurnal and annual cycles; it must also incorporate features that satisfy human social needs. What kind of a clock and calendar do Martians want? The Martian Time Web Site began conducting an online poll in September 1998. The Martian Time Poll consists of 25 questions on the basic elements of Martian timekeeping. The results of the first Martian year of data are reported and discussed. KEYWORDS: timekeeping, Mars calendars, Mars clocks, measurement as social construct. 1. INTRODUCTION As we humans establish ourselves as a multiplanetary species, spreading throughout the Solar System during this new century, we will leave behind the 24-hour day and the 365-day year. These are cycles that are peculiar to Earth, and as a product of billions of years of evolution on this planet, we are designed to operate by them. Humans will have no use for diurnal periods that are hundreds of hours long. Similarly, years of 12 or 29 times the duration of the terrestrial year (the orbital periods of Jupiter and Saturn, respectively) will be of no practical use in human affairs. We define a standard unit, the second, in as abstract a way as possible for the physical sciences, but time is a social measurement, first and foremost. -
DFDL WG Stephen M Hanson, IBM [email protected] September 2014
GFD-P-R.207 (OBSOLETED by GFD-P-R.240) Michael J Beckerle, Tresys Technology OGF DFDL WG Stephen M Hanson, IBM [email protected] September 2014 Data Format Description Language (DFDL) v1.0 Specification Status of This Document Grid Final Draft (GFD) Obsoletes This document obsoletes GFD-P-R.174 dated January 2011 [OBSOLETE_DFDL]. Copyright Notice Copyright © Global Grid Forum (2004-2006). Some Rights Reserved. Distribution is unlimited. Copyright © Open Grid Forum (2006-2014). Some Rights Reserved. Distribution is unlimited Abstract This document is OBSOLETE. It is superceded by GFD-P-R.240. This document provides a definition of a standard Data Format Description Language (DFDL). This language allows description of text, dense binary, and legacy data formats in a vendor- neutral declarative manner. DFDL is an extension to the XML Schema Description Language (XSDL). GFD-P-R.207 (OBSOLETED by GFD-P-R.240) September 2014 Contents Data Format Description Language (DFDL) v1.0 Specification ...................................................... 1 1. Introduction ............................................................................................................................... 9 1.1 Why is DFDL Needed? ................................................................................................... 10 1.2 What is DFDL? ................................................................................................................ 10 Simple Example ...................................................................................................... -
THIRTEEN MOONS in MOTION: a Dreamspell Primer
© Galactic Research Institute of the Foundation for the Law of Time - www.lawoftime.org THIRTEEN MOONS IN MOTION: A Dreamspell Primer “Just as air is the atmosphere of the body, so time is the atmosphere of the mind; if the time in which we live consists of uneven months and days regulated by mechanized minutes and hours, that is what becomes of our mind: a mechanized irregularity. Since everything follows from mind, it is no wonder that The atmosphere in which we live daily becomes more polluted, And the greatest complaint is: ‘I just don’t have enough time!’ Who owns your time, owns your mind. Own your own time and you will know your own mind.” Foundation for the Law of Time www.lawoftime.org © Galactic Research Institute of the Foundation for the Law of Time - www.lawoftime.org 13-Moon Planetary Kin Starter Calendar 3 A Season Of Apocalypses: The Gregorian Calendar Unmasked A 13-Moon Postscript to the Mayan Factor 1. Thinking about the Unthinkable Of all the unexamined assumptions and criteria upon which we base and gauge our daily lives as human beings on planet Earth, by far the greatest and most profoundly unquestioned is the instrument and institution known as the Gregorian Calendar. A calendar, any calendar, is commonly understood as a system for dividing time over extended periods. A day is the base unit of a calendar, and the solar year is the base extended period. The length of the solar year is currently reckoned at 365.242199 days. The Gregorian calendar divides this duration into twelve uneven months – four months of 30 days, seven of 31 days, and one of 28 days. -
The Calendars of India
The Calendars of India By Vinod K. Mishra, Ph.D. 1 Preface. 4 1. Introduction 5 2. Basic Astronomy behind the Calendars 8 2.1 Different Kinds of Days 8 2.2 Different Kinds of Months 9 2.2.1 Synodic Month 9 2.2.2 Sidereal Month 11 2.2.3 Anomalistic Month 12 2.2.4 Draconic Month 13 2.2.5 Tropical Month 15 2.2.6 Other Lunar Periodicities 15 2.3 Different Kinds of Years 16 2.3.1 Lunar Year 17 2.3.2 Tropical Year 18 2.3.3 Siderial Year 19 2.3.4 Anomalistic Year 19 2.4 Precession of Equinoxes 19 2.5 Nutation 21 2.6 Planetary Motions 22 3. Types of Calendars 22 3.1 Lunar Calendar: Structure 23 3.2 Lunar Calendar: Example 24 3.3 Solar Calendar: Structure 26 3.4 Solar Calendar: Examples 27 3.4.1 Julian Calendar 27 3.4.2 Gregorian Calendar 28 3.4.3 Pre-Islamic Egyptian Calendar 30 3.4.4 Iranian Calendar 31 3.5 Lunisolar calendars: Structure 32 3.5.1 Method of Cycles 32 3.5.2 Improvements over Metonic Cycle 34 3.5.3 A Mathematical Model for Intercalation 34 3.5.3 Intercalation in India 35 3.6 Lunisolar Calendars: Examples 36 3.6.1 Chinese Lunisolar Year 36 3.6.2 Pre-Christian Greek Lunisolar Year 37 3.6.3 Jewish Lunisolar Year 38 3.7 Non-Astronomical Calendars 38 4. Indian Calendars 42 4.1 Traditional (Siderial Solar) 42 4.2 National Reformed (Tropical Solar) 49 4.3 The Nānakshāhī Calendar (Tropical Solar) 51 4.5 Traditional Lunisolar Year 52 4.5 Traditional Lunisolar Year (vaisnava) 58 5. -
Chapter 5 – Date
Chapter 5 – Date Luckily, most of the problems involving time have mostly been solved and packed away in software and hardware where we, and our customers overseas, do not have to deal with it. Thanks to standardization, if a vender in Peking wants to call a customer in Rome, he checks the Internet for the local time. As far as international business goes, it’s generally 24/7 anyway. Calendars on the other hand, are another matter. You may know what time it is in Khövsgöl, Mongolia, but are you sure what day it is, if it is a holiday, or even what year it is? The purpose of this chapter is to make you aware of just how many active calendars there are out there in current use and of the short comings of our Gregorian system as we try to apply it to the rest of the world. There just isn’t room to review them all so think of this as a kind of around the world in 80 days. There are so many different living calendars, and since the Internet is becoming our greatest library yet, a great many ancient ones that must be accounted for as well. We must consider them all in our collations. As I write this in 2010 by the Gregorian calendar, it is 2960 in Northwest Africa, 1727 in Ethopia, and 4710 by the Chinese calendar. A calendar is a symbol of identity. They fix important festivals and dates and help us share a common pacing in our lives. They are the most common framework a civilization or group of people can have. -
Elam and Babylonia: the Evidence of the Calendars*
BASELLO E LAM AND BABYLONIA : THE EVIDENCE OF THE CALENDARS GIAN PIETRO BASELLO Napoli Elam and Babylonia: the Evidence of the Calendars * Pochi sanno estimare al giusto l’immenso benefizio, che ogni momento godiamo, dell’aria respirabile, e dell’acqua, non meno necessaria alla vita; così pure pochi si fanno un’idea adeguata delle agevolezze e dei vantaggi che all’odierno vivere procura il computo uniforme e la divisione regolare dei tempi. Giovanni V. Schiaparelli, 1892 1 Babylonians and Elamites in Venice very historical research starts from Dome 2 just above your head. Would you a certain point in the present in be surprised at the sight of two polished Eorder to reach a far-away past. But figures representing the residents of a journey has some intermediate stages. Mesopotamia among other ancient peo- In order to go eastward, which place is ples? better to start than Venice, the ancient In order to understand this symbolic Seafaring Republic? If you went to Ven- representation, we must go back to the ice, you would surely take a look at San end of the 1st century AD, perhaps in Marco. After entering the church, you Rome, when the evangelist described this would probably raise your eyes, struck by scene in the Acts of the Apostles and the golden light floating all around: you compiled a list of the attending peoples. 3 would see the Holy Spirit descending If you had an edition of Paulus Alexan- upon peoples through the preaching drinus’ Sã ! Ğ'ã'Ğ'·R ğ apostles. You would be looking at the (an “Introduction to Astrology” dated at 12th century mosaic of the Pentecost 378 AD) 4 within your reach, you should * I would like to thank Prof.