The Secrets of Writing
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Nondecimal Positional Systems
M03_LONG0847_05_AIE_C03.qxd 9/17/07 10:38 AM Page 162 Not for Sale 162 CHAPTER 3 Numeration and Computation 3.2 Nondecimal Positional Systems In the preceding section, we discussed several numeration systems, including the decimal system in common use today. As already mentioned, the decimal system is a positional system based on 10. This is probably so because we have ten fingers and historically, as now, people often counted on their fingers. In the Did You Know box at the end of this section, we will give applications of positional systems that are based on whole numbers other than 10. One very useful application of bases other than ten is as a way to deepen our understanding of number systems, arithmetic in general, and our own decimal system. Although bases other than ten were in the K–5 curriculum in the past, they are not present currently. However, nondecimal positional systems are studied in the “math methods” course that is a part of an elementary education degree and may return to elementary school in the future. We will discuss addition and subtraction in base five in the next section and multiplication in base six in the following one. Base Five Notation For our purposes, perhaps the quickest route to understanding base five notation is to reconsider the abacus of Figure 3.1. This time, however, we allow only 5 beads to be moved forward on each wire. As before, we start with the wire to the students’ right (our left) and move 1 bead forward each time as we count 1, 2, 3, and so on. -
13054-Duodecimal.Pdf
Universal Multiple-Octet Coded Character Set International Organization for Standardization Organisation Internationale de Normalisation Международная организация по стандартизации Doc Type: Working Group Document Title: Proposal to encode Duodecimal Digit Forms in the UCS Author: Karl Pentzlin Status: Individual Contribution Action: For consideration by JTC1/SC2/WG2 and UTC Date: 2013-03-30 1. Introduction The duodecimal system (also called dozenal) is a positional numbering system using 12 as its base, similar to the well-known decimal (base 10) and hexadecimal (base 16) systems. Thus, it needs 12 digits, instead of ten digits like the decimal system. It is used by teachers to explain the decimal system by comparing it to an alternative, by hobbyists (see e.g. fig. 1), and by propagators who claim it being superior to the decimal system (mostly because thirds can be expressed by a finite number of digits in a "duodecimal point" presentation). • Besides mathematical and hobbyist publications, the duodecimal system has appeared as subject in the press (see e.g. [Bellos 2012] in the English newspaper "The Guardian" from 2012-12-12, where the lack of types to represent these digits correctly is explicitly stated). Such examples emphasize the need of the encoding of the digit forms proposed here. While it is common practice to represent the extra six digits needed for the hexadecimal system by the uppercase Latin capital letters A,B.C,D,E,F, there is no such established convention regarding the duodecimal system. Some proponents use the Latin letters T and E as the first letters of the English names of "ten" and "eleven" (which obviously is directly perceivable only for English speakers). -
Zero Displacement Ternary Number System: the Most Economical Way of Representing Numbers
Revista de Ciências da Computação, Volume III, Ano III, 2008, nº3 Zero Displacement Ternary Number System: the most economical way of representing numbers Fernando Guilherme Silvano Lobo Pimentel , Bank of Portugal, Email: [email protected] Abstract This paper concerns the efficiency of number systems. Following the identification of the most economical conventional integer number system, from a solid criteria, an improvement to such system’s representation economy is proposed which combines the representation efficiency of positional number systems without 0 with the possibility of representing the number 0. A modification to base 3 without 0 makes it possible to obtain a new number system which, according to the identified optimization criteria, becomes the most economic among all integer ones. Key Words: Positional Number Systems, Efficiency, Zero Resumo Este artigo aborda a questão da eficiência de sistemas de números. Partindo da identificação da mais económica base inteira de números de acordo com um critério preestabelecido, propõe-se um melhoramento à economia de representação nessa mesma base através da combinação da eficiência de representação de sistemas de números posicionais sem o zero com a possibilidade de representar o número zero. Uma modificação à base 3 sem zero permite a obtenção de um novo sistema de números que, de acordo com o critério de optimização identificado, é o sistema de representação mais económico entre os sistemas de números inteiros. Palavras-Chave: Sistemas de Números Posicionais, Eficiência, Zero 1 Introduction Counting systems are an indispensable tool in Computing Science. For reasons that are both technological and user friendliness, the performance of information processing depends heavily on the adopted numbering system. -
A Thesis Entitled Knotted Numbers, Mnemonics, and Narratives: Khipu
A Thesis entitled Knotted Numbers, Mnemonics, and Narratives: Khipu Scholarship and the Search for the “Khipu Code” throughout the Twentieth and Twenty First Century by Veronica Lysaght Submitted to the Graduate Faculty as partial fulfillment of the requirements for the Master of Arts Degree in History ________________________________________ Charles Beatty-Medina, Committee Chair ________________________________________ Roberto Padilla, Committee Member ________________________________________ Kim Nielsen, Committee Member _______________________________________ Amanda Bryant-Friedrich, Dean College of Graduate Studies The University of Toledo July 2016 Copyright 2016, Veronica Lee Lysaght This document is copyrighted material. Under copyright law, no parts of this document may be reproduced without the expressed permission of the author. An Abstract of Knotted Numbers, Mnemonics, and Narratives: Khipu Scholarship and the Search for the “Khipu Code” throughout the Twentieth and Twenty First Century by Veronica Lysaght Submitted to the Graduate Faculty as partial fulfillment of the requirements for the Master of Arts Degree in History The University of Toledo July 2016 My thesis explores the works of European and North American khipu scholars (mainly anthropologists) from 1912 until 2010. I analyze how they incorporated aspects of their own culture and values into their interpretations of Inca khipus’ structure and functions. As Incas did not leave behind a written language or even clear non-written descriptions of their khipus, anthropologists interpreted khipus’ purposes with a limited base of Inca perspectives. Thus, every work of khipu literature that I study reflects both elements of Inca culture and the author’s own cultural perspectives as a twentieth or twenty-first century academic. I show how each work is indicative of modern cultural views on writing, as well as academic movements and broader social trends that were prominent during the author’s time. -
The Quipu of the Incas: Its Place in the History of Communication by Leo J
The Quipu of the Incas: Its Place in the History of Communication by Leo J. Harris The study of postal history has, through time, been defined in a number of different ways. Most of us consider postal history to be the study of how a paper with writing on it was carried in some sort of organized fashion from place to place. But more broadly, and for the purpose of this short article, postal history could be defined as the study of moving information on an organized basis from one place to another. This definition has particular meaning when one considers the situation in which the prevailing language had no written form. That is precisely the case with the Inca Empire in South America. The Inca Empire (circa 1400 AD to 1532 AD) stretched from Chile and Argentina on the south, through Bolivia and Peru, to Ecuador on the north. The topography was desert, the high Andes mountains, plateaus and jungles. The empire was held together by two principal means. The first was a highly developed, often paved road system, which even today is followed in part by the Pan American highway. The second were “Chasquis,” Indian runners who carried messages from one Tambo (or way-station) to another, over these roads. In this manner adequate communication was assured, but to this had to be added a method to preserve and transmit information. Given the length and breadth of the Empire, the Inca hierarchy needed a significant and continuing flow of information and data to exercise economic and political control over greatly diverse inhabitants. -
Knotting Matters 5
‘KNOTTING MATTERS’ THE QUARTERLY NEWSLETTER OF THE INTERNATIONAL GUILD OF KNOT TYERS President: Percy W. Blandford Hon. Secretary & Editor, Geoffrey BUDWORTH, 45, Stambourne Way, Upper Norwood, London S.E.19 2PY, England. tel: 01-6538757 Issue No. 5 October, 1983 - - - oOo - - - EDITORIAL In an article within this issue Dr. Harry ASHER describes an original method of classifying knots. There will be those - understandably - who dismiss his ideas because they may seem impractical. After all, didn’t Australian knot craftsman Charles H.S. THOMASON write recently in these pages; “I don’t know the names of many of the knots I tie.” One of the Guild’s aims is, however, to undertake research into all aspects of knotting. When I had to produce a training manual entitled ‘The Identification of Knots’ for forensic scientists and other criminal investigators, my first challenge was to devise a system of grouping and classifying over 100 basic knots, bends and hitches. You can’t ask people who don’t know knot names to look one up in an alphabetical index. I chose to group them according to the number of crossing points each one possessed. Scientists can count. Harry ASHER’s method actually describes in a kind of speed-writing how they are tied. Mathematicians studying topology assign numerical values to knots and then evolve formulae to compare them. The “Reidemeister Moves” are, I believe, an attempt to give names to the ways in which a cord may be arranged and rearranged. Some of us will never acquire the mathematical language to understand all of this; but we surely must be able to treat knots systematically and logically if we are to learn more about them than we know already. -
A Ternary Arithmetic and Logic
Proceedings of the World Congress on Engineering 2010 Vol I WCE 2010, June 30 - July 2, 2010, London, U.K. A Ternary Arithmetic and Logic Ion Profeanu which supports radical ontological dualism between the two Abstract—This paper is only a chapter, not very detailed, of eternal principles, Good and Evil, which oppose each other a larger work aimed at developing a theoretical tool to in the course of history, in an endless confrontation. A key investigate first electromagnetic fields but not only that, (an element of Manichean doctrine is the non-omnipotence of imaginative researcher might use the same tool in very unusual the power of God, denying the infinite perfection of divinity areas of research) with the stated aim of providing a new perspective in understanding older or recent research in "free that has they say a dual nature, consisting of two equal but energy". I read somewhere that devices which generate "free opposite sides (Good-Bad). I confess that this kind of energy" works by laws and principles that can not be explained dualism, which I think is harmful, made me to seek another within the framework of classical physics, and that is why they numeral system and another logic by means of which I will are kept far away from public eye. So in the absence of an praise and bring honor owed to God's name; and because adequate theory to explain these phenomena, these devices can God is One Being in three personal dimensions (the Father, not reach the design tables of some plants in order to produce them in greater number. -
Chapter 6 MISCELLANEOUS NUMBER BASES. the QUINARY
The Number Concept: Its Origin and Development By Levi Leonard Conant Ph. D. Chapter 6 MISCELLANEOUS NUMBER BASES. THE QUINARY SYSTEM. The origin of the quinary mode of counting has been discussed with some fulness in a preceding chapter, and upon that question but little more need be said. It is the first of the natural systems. When the savage has finished his count of the fingers of a single hand, he has reached this natural number base. At this point he ceases to use simple numbers, and begins the process of compounding. By some one of the numerous methods illustrated in earlier chapters, he passes from 5 to 10, using here the fingers of his second hand. He now has two fives; and, just as we say “twenty,” i.e. two tens, he says “two hands,” “the second hand finished,” “all the fingers,” “the fingers of both hands,” “all the fingers come to an end,” or, much more rarely, “one man.” That is, he is, in one of the many ways at his command, saying “two fives.” At 15 he has “three hands” or “one foot”; and at 20 he pauses with “four hands,” “hands and feet,” “both feet,” “all the fingers of hands and feet,” “hands and feet finished,” or, more probably, “one man.” All these modes of expression are strictly natural, and all have been found in the number scales which were, and in many cases still are, in daily use among the uncivilized races of mankind. In its structure the quinary is the simplest, the most primitive, of the natural systems. -
I – Mathematics in Design – SMTA1103
SCHOOL OF SCIENCE AND HUMANITIES DEPARTMENT OF MATHEMATICS UNIT – I – Mathematics in Design – SMTA1103 UNIT1- MATHEMATICS IN DESIGN Golden Ratio The ratio of two parts of a line such that the longer part divided by the smaller part is also equal to the whole length divided by the longer part. Results: i) The ratio of the circumference of a circle to its diameter is π . ii) The ratio of the width of a rectangular picture frame to its height is not necessarily equal to he golden ratio, though some artists and architects believe a frame made using the golden ratio makes the most pleasing and beautiful shape.iii) The ratio of two successive numbers of the Fibonacci sequence give an approximate value of the golden ratio,the bigger the pair of Fibonacci Numbers, the closer the approximation. Example1: The Golden Ratio = 1.61803398874989484820... = 1.618 correct to 3 decimal places. If x n are terms of the Fibonacci sequence, then what is the least value of n for which ( x n +1 / x n = 1.618 correct to 3 decimal places. Example2: A rectangle divided into a square and a smaller rectangle. If (x + y) /y = x / y ,find the value of golden ratio. Example3: The Golden Ratio = 1.61803398874989484820... = 1.6180 correct to 4 decimal places. If xn are terms of the Fibonacci sequence, then what is the least value of n for which (x n +1) / x n = 1.618 0 correct to 4 decimal places. Example4: Obtain golden ratio in a line segment. Proportion Proportion is an equation which defines that the two given ratios are equivalent to each other. -
The Counting System of the Incas in General, There Is a Lack of Material on the History of Numbers from the Pre-Columbian Americas
History of Numbers 1b. I can determine the number represented on an Inca counting board, and a quipu cord. The Counting System of the Incas In general, there is a lack of material on the history of numbers from the pre-Columbian Americas. Most of the information available concentrates on the eastern hemisphere, with Europe as the focus. Why? First, there has been a false assumption that indigenous peoples in the Americas lacked any specialized mathematics. Second, it seems at least some of their ancient mathematics has been intentionally kept secret. And Einally, when Europeans invaded and colonized the Americas, much of that evidence was most likely destroyed. In the 1960's, two researchers attempted to discover what mathematical knowledge was known by the Incas and how they used the Peruvian quipu, a counting system using cords and knots, in their mathematics. These researchers have come to certain beliefs about the quipu that are summarized below: Counting Boards It seems the Incas did not have a complicated system of computation. Whereas other peoples in the region, such as the Mayans, were doing computations related to their rituals and calendars, the Incas seem to have been more concerned with the task of record-keeping. To do this, they used what are called “quipu”(or khipu) to record quantities of items. However, they Eirst often needed to do computations whose results would be recorded on a quipu. To do these computations, they sometimes used a counting board or Yupana (from the Quechua word "yupay": count) made from a slab of wood or stone. -
Federal Register/Vol. 82, No. 108/Wednesday, June 7, 2017
26340 Federal Register / Vol. 82, No. 108 / Wednesday, June 7, 2017 / Rules and Regulations Administrative Procedure Act (APA) certain archaeological and ethnological the imposition of these restrictions, and because this action is administrative in materials from Peru. The restrictions, included a list designating the types of nature. This action postpones the which were originally imposed by archaeological and ethnological effectiveness of the discharge Treasury Decision (T.D.) 97–50 and last materials covered by the restrictions. requirements in the regulations for extended by CBP Dec. 12–11, are due to These restrictions continued the CBNMS and GFNMS in the areas added expire on June 9, 2017, unless extended. protection of archaeological materials to the sanctuaries’ boundaries in 2015 The Acting Assistant Secretary for from the Sipa´n Archaeological Region (subject to notice and comment review) Educational and Cultural Affairs, United forming part of the remains of the with regard to USCG activities for six States Department of State, has Moche culture that were first subject to months to provide adequate time for determined that conditions continue to emergency import restriction on May 7, public scoping, completion of an warrant the imposition of import 1990 (T.D. 90–37). environmental assessment, and restrictions. The Designated List of Import restrictions listed in 19 CFR subsequent rulemaking, as appropriate. archaeological and ethnological 12.104g(a) are ‘‘effective for no more Should NOAA decide to amend the materials described in T.D. 97–50 is than five years beginning on the date on regulations governing discharges in revised in this document to reflect the which the agreement enters into force CBNMS and GFNMS, it would publish addition of Colonial period documents with respect to the United States. -
An Historical and Analytical Study of the Tally, The
Copyright by JttUa Slisabobh Adkina 1956 AN HISTORICAL AND ANALYTICAL STUDY OF THE TALLY, THE KNOTTED CORD, THE FINGERS, AND THE ABACUS DISSERTATION Presented in Partial Fulfillment of the Requirements for the Degree Doctor of Philosophy in the Graduate School of The Ohio State U n iv e rsity Sy JULIA ELIZABETH ADKINS, A. B ., M. A. The Ohio State University 1936 Approved by: A dviser Department of Educati ACiCNOWLEDGMENT The author is deeply indebted to Professor Nathan lasar for his inspiration, guidance, and patience during the writing of this dissertation. IX lâBIfi OF CONTENTS GHAFTSl Fàm 1. INTRWCTION................................................................................... 1 Pl^iflËÜaaxy Statcum t ......................................................... 1 âtatamant of the Problem ............ 2 Sqportanee of the Problem ............................................. 3 Scope and Idmitationa of the S tu d y ............................................. 5 The Method o f the S tu d y ..................................................................... 5 BerLeir o f th e L i t e r a t u r e ............................................................ 6 Outline of the Remainder of the Study. ....................... 11 II. THE TâLLI .............................................. .................................................. 14 Definition and Etymology of "Tally? *. ...... .... 14 Types of T a llies .................................................................................. 16 The Notch T a lly ...............................