...researcher could do their work faster and run complex software systems. A 64-bit CPU also has more memory, it can have more than 4GB of memory compared to the 3GB - 4GB a 32-bit CPU has. This is important for downloading programs they need to use. It is also better for processing huge amounts of data at one time which is necessary for a researcher. 2. Distributed computing is a network of independent computers which communicate to achieve a goal. They do not share a memory or processors and communicate with pieces of information transferred over a network. Parallel computing uses multiple processers which each work on different things but share the same data. It was brought in to find a way around mechanical and physical restrictions on computer speed. 3....
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...tests and the results from the numerical simulations, confirming that the criterion is not the limiting requirement for the examined ship design. Proposals for instructions are presented in order to improve accuracy of model test results and facilitate the possibility to derive limiting GM values based on model tests. Keywords: weather criterion, metacentric height, limit curve, roll, damping, irregular wave, sea state 1. INTRODUCTION The IMO Weather Criterion, resolution A.749(18) Chapter 3.2 (today superseded by resolution MSC.267(85) Part A Chapter 2.3), describes the ability of a ship to withstand the combined effects of beam wind and roll motions under a specified weather condition. The basic idea of the criterion is to determine the minimum metacentric height for which a ship still is able to withstand a prescribed sudden wind gust, while rolling under the action of...
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...The Wright Brothers Invent the Airplane About one hundred years ago the planet earth was a much smaller place. On December 17, 1903 the Wright brothers, Wilbur and Orville, made history when they took off in flight and invented the first airplane. This is how the planet earth began shrinking geographically making it easier and quicker to travel over long distances. Wilbur was the older of the two brothers by four years. Wilbur was born in 1867 on a farm near Millville, Indiana and Orville was born in 1871 near Dayton, Indiana. As youngsters, Wilbur and Orville looked to their mother for mechanical expertise and their father for intellectual challenge. Milton, their father, brought them various souvenirs and trinkets he found during his travels for the church. One such trinket, a toy helicopter-like top, sparked the boys' interest in flying. In school, Wilbur excelled, and would have graduated from high school if his family had not moved during his senior year. A skating accident and his mother's illness and subsequent death kept him from attending college. Orville was an average student, known for his mischievous behavior. He quit school before his senior year to start a printing business. The two brothers were very intellectual and smart, but both did not ever get their high school diplomas. It just goes to show that even two of the best minds in our history didn’t have to go to college or even finish high school to become these great minds. The first time Wilbur and...
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...~~~Concept of Wind-tunnel~~~ Wind tunnels date back to the 1870’s. Scientists realized it didn’t matter if an object was stationary and air was blown was over the object or if the object was moving through the air. The resultant forces over the object would be the same. The idea of blowing air over an object and determining the forces lead to the invention of wind tunnel. As the name suggests, a wind-tunnel is a cylindrical tunnel in which air is blown from one side by a huge fan at high speeds. The middle part of the tunnel is called as throat. It is the place where the test model is placed. Various sensors are attached to the test model and the data is collected in the room near it. The data collected issued to reduce the aerodynamic drag and minimize fuel consumption and also increase the speed of the cars, trucks, planes, etc. also aerodynamic properties like lift, drag, forces, moments are measured with the use of wind-tunnel. In wind-tunnel air is blown over the test model which is kept stationary at the throat. This will produce the same effect as it would be produced if the vehicle is moving at high speeds on a road. For more accurate results the tunnel is sometimes equipped with rolling road to prevent the boundary layer forming on the floor which may affect the test results. * What are wind tunnels? Just as its name suggests, a wind tunnel is a tube or tunnel that has man-made windblown through it at a certain speed. Scientists and engineers put...
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...Guide to Meteorological Instruments and Methods of Observation WMO-No. 8 Guide to Meteorological Instruments and Methods of Observation WMO-No. 8 Seventh edition 2008 WMO-No. 8 © World Meteorological Organization, 2008 The right of publication in print, electronic and any other form and in any language is reserved by WMO. Short extracts from WMO publications may be reproduced without authorization, provided that the complete source is clearly indicated. Editorial correspondence and requests to publish, reproduce or translate this publication in part or in whole should be addressed to: Chairperson, Publications Board World Meteorological Organization (WMO) 7 bis, avenue de la Paix P.O. Box No. 2300 CH-1211 Geneva 2, Switzerland ISBN 978-92-63-10008-5 NOTE The designations employed in WMO publications and the presentation of material in this publication do not imply the expression of any opinion whatsoever on the part of the Secretariat of WMO concerning the legal status of any country, territory, city or area, or of its authorities, or concerning the delimitation of its frontiers or boundaries. Opinions expressed in WMO publications are those of the authors and do not necessarily reflect those of WMO. The mention of specific companies or products does not imply that they are endorsed or recommended by WMO in preference to others of a similar nature which are not mentioned or advertised. Tel.: +41 (0) 22 730 84 03 Fax: +41 (0) 22 730 80 40 E-mail: publications@wmo...
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...SIMPLE SCIENCE EXPERIMENTS HANS JURGEN PRESS 1. Astronomy Image of the Sun Place a pair of binoculars in an open window in the direct path of the sun’s rays. Stand a mirror in front of one eyepiece so that it throws an image of the sun on to the opposite wall of the room. Adjust the mirror until the image is sharp, and darken the room. You would risk damaging your eyes if you looked directly at the sun through binoculars, but you can view the bright disc on the wall as large and clear as in the movies. Clouds and birds passing over can also be distinguished and. if the binoculars are good even sunspots. These are a few hot areas on the glowing sphere, some so big that many terrestrial globes could fit into them. Because of the earth’s rotation, the sun’s image moves quite quickly across the wall. Do not forget to re-align the binoculars from time to time onto the sun. The moon and stars cannot be observed in this way because the light coming from them is too weak. 2. Sun clock Place a flowerpot with a long stick fixed into the hole at the bottom in a spot, which is sunny, all day. The stick’s shadow moves along the rim of the pot as the sun moves. Each hour by the clock mark the position of the shadow on the pot. If the sun is shining, you can read off the time. Because of the rotation of the earth the sun apparently passes over us in a semi-circle. In the morning and evening its shadow strikes the pot superficially, while; it midday, around 12 o’clock...
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...PHYSIC AL CONSTANTS CONSTANT Speed of light Elementary charge Electron mass Proton mass Gravitational constant Permeability constant Permittivity constant Boltzmann’s constant Universal gas constant Stefan–Boltzmann constant Planck’s constant Avogadro’s number Bohr radius SYMBOL c e me mp G m0 P0 k R s h 15 2p"2 NA a0 THREE-FIGURE VALUE 3.003108 m/s 1.60310219 C 9.11310231 kg 1.67310227 kg 6.67310211 N # m2/kg 2 1.2631026 N/A2 1H/m2 8.85310212 C 2/N # m2 1F/m2 1.38310223 J/K 8.31 J/K # mol 5.6731028 W/m2 # K4 6.63310234 J # s 6.0231023 mol21 5.29310211 m BEST KNOWN VALUE* 299 792 458 m/s (exact) 1.602 176 4871402 310219 C 9.109 382 151452 310231 kg 1.672 621 6371832 310227 kg 6.674 281672 310211 N # m2/kg 2 4p31027 (exact) 1/m0c2 (exact) 1.380 65041242 310223 J/K 8.314 4721152 J/K # mol 5.670 4001402 31028 W/m2 # K4 6.626 068 961332 310234 J # s 6.022 141 791302 31023 mol21 5.291 772 08591362 310211 m *Parentheses indicate uncertainties in last decimal places. Source: U.S. National Institute of Standards and Technology, 2007 values SI PREFIXES POWER 1024 1021 1018 1015 1012 109 106 103 102 101 100 1021 1022 1023 1026 1029 10212 10215 10218 10221 10224 THE GREEK ALPHABET PREFIX yotta zetta exa peta tera giga mega kilo hecto deca — deci centi milli micro nano pico femto atto zepto yocto SYMBOL Y Z E P T G M k h da — d c m μ n p f a z y Alpha ...
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...C DESIGN ERS R E D I STACY LONGSTREET T S SE N IOR A RT DI REC TOR R P G R& D A RT DI REC TOR S GWENDOLYN F.M. KESTREL , JENNIFER CLARKE WILKES, KOLJA RAVEN LIQUETTE DEVELOPMENT TEAM KARIN JAQUES, STACY LONGSTREET C OV E R A RT I S T BRUCE R. CORDELL , ANDY COLLINS, ROB WATKINS EDITORS STEVE PRESCOTT I N T E R IOR A RT IST S MICHELLE LYONS, CHRIS SIMS EDITI NG MANAGER KIM MOHAN DESIGN MANAGER STEVEN BELLEDIN, ED COX, DAARKEN, WAYNE ENGLAND, EMILY FIEGENSCHUH, CARL FRANK, DAN FRAZIER, BRIAN HAGAN, RALPH HORSLEY, CHRIS MALIDORE , JIM NELSON, ERIC POLAK CA RTOG R A PHE R CHRISTOPHER PERKINS DEV ELOPMEN T MANAGER MIKE SCHLEY GRAPHIC DESIGN ER JESSE DECKER DIRECTOR OF RPG R&D DEE BARNETT G R A P H IC P RODUC T ION S P E C I A L I S T BILL SLAVICSEK P RODUC T ION MA NAGE R S ERIN DORRIES IMAGE T ECHN ICIAN JOSH FISCHER, RANDALL CREWS CHRISTINA WILEY Playtesters: Kraig Horigan, Jason H. Haley, Richard Hughes, Richard Stephenson. Some information in this book is taken from or derived from Draconomicon: The Book of Dragons by Andy Collins, Skip Williams, and James Wyatt. Based on the original DUNGEONS & DRAGONS® rules created by E. Gary Gygax and Dave Arneson, and the new DUNGEONS & DRAGONS game designed by Jonathan Tweet, Monte Cook, Skip Williams, Richard Baker, and Peter Adkison. This product uses updated material from the v.3.5 revision. This WIZARDS OF THE COAST® game product contains no Open Game...
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...Around the World in 80 Days By Jules Verne Download free eBooks of classic literature, books and novels at Planet eBook. Subscribe to our free eBooks blog and email newsletter. CHAPTER I IN WHICH PHILEAS FOGG AND PASSEPARTOUT ACCEPT EACH OTHER, THE ONE AS MASTER, THE OTHER AS MAN M r. Phileas Fogg lived, in 1872, at No. 7, Saville Row, Burlington Gardens, the house in which Sheridan died in 1814. He was one of the most noticeable members of the Reform Club, though he seemed always to avoid attracting attention; an enigmatical personage, about whom little was known, except that he was a polished man of the world. People said that he resembled Byron—at least that his head was Byronic; but he was a bearded, tranquil Byron, who might live on a thousand years without growing old. Certainly an Englishman, it was more doubtful whether Phileas Fogg was a Londoner. He was never seen on ‘Change, nor at the Bank, nor in the counting-rooms of the Around the World in 80 Days ‘City”; no ships ever came into London docks of which he was the owner; he had no public employment; he had never been entered at any of the Inns of Court, either at the Temple, or Lincoln’s Inn, or Gray’s Inn; nor had his voice ever resounded in the Court of Chancery, or in the Exchequer, or the Queen’s Bench, or the Ecclesiastical Courts. He certainly was not a manufacturer; nor was he a merchant or a gentleman farmer. His name was strange to the scientific and learned societies...
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...Climate Change Impacts & Risk Management A Guide for Business and Government Published by the Australian Greenhouse Office, in the Department of the Environment and Heritage. ISBN: 1 921120 56 8 © Commonwealth of Australia 2006 This work is copyright. Apart from any use as permitted under the Copyright Act 1968, no part may be reproduced by any process without prior written permission from the Commonwealth, available from the Department of the Environment and Heritage. Requests and inquiries concerning reproduction and rights should be addressed to: The Communications Director Australian Greenhouse Office Department of the Environment and Heritage GPO Box 787 CANBERRA ACT 2601 Email: communications@greenhouse.gov.au This publication is available electronically at www.greenhouse.gov.au IMPORTANT NOTICE - PLEASE READ While reasonable efforts have been made to ensure that the contents of this publication are factually correct, the Commonwealth does not accept responsibility for the accuracy or completeness of the contents, and shall not be liable for any loss or damage that may be occasioned directly or indirectly through the use of, or reliance on, the contents of this publication. Climate Change Impacts & Risk Management A Guide for Business and Government Prepared for the Australian Greenhouse Office, Department of Environment and Heritage by: Broadleaf Capital International Marsden Jacob Associates CONTENTS A What This Guide Is About 1 Introduction 1.1 Purpose...
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...SENIOR SECONDARY COURSE PHYSICS 1 (CORE MODULES) Coordinators Dr. Oum Prakash Sharma Sh. R.S. Dass NATIONAL INSTITUTE OF OPEN SCHOOLING A-25, INSTITUTIONAL AREA, SECTOR-62, NOIDA-201301 (UP) COURSE DESIGN COMMITTEE CHAIRMAN Prof. S.C. Garg Former Pro-Vice Chancellor IGNOU, Maidan Garhi, Delhi MEMBERS Prof. A.R. Verma Former Director, National Physical Laboratory, Delhi, 160, Deepali Enclave Pitampura, Delhi-34 Dr. Naresh Kumar Reader (Rtd.) Deptt. of Physics Hindu College, D.U. Dr. Oum Prakash Sharma Asstt. Director (Academic) NIOS, Delhi Prof. L.S. Kothari Prof. of Physics (Retd.) Delhi University 71, Vaishali, Delhi-11008 Dr. Vajayshree Prof. of Physics IGNOU, Maidan Garhi Delhi Sh. R.S. Dass Vice Principal (Rtd.) BRMVB, Sr. Sec. School Lajpat Nagar, New Delhi-110024 Dr. G.S. Singh Prof. of Physics IIT Roorkee Sh. K.S. Upadhyaya Principal Jawahar Navodaya Vidyalaya Rohilla Mohammadabad (U.P.) Dr. V.B. Bhatia Prof. of Physics (Retd.) Delhi University 215, Sector-21, Faridabad COURSE DEVELOPMENT TEAM CHAIRMAN Prof. S.C. Garg Former Pro-Vice Chancellor IGNOU, Delhi MEMBERS Prof. V.B. Bhatia 215, Sector-21, Faridabad Prof. B.B. Tripathi Prof. of Physics (Retd.), IIT Delhi 9-A, Awadhpuri, Sarvodaya Nagar Lucknow-226016 Sh. K.S. Upadhyaya Principal Navodaya Vidyalaya Rohilla Mohammadabad, (U.P.) Dr. V.P. Shrivastava Reader (Physics) D.E.S.M., NCERT, Delhi EDITORS TEAM CHAIRMAN Prof. S.C. Garg Former Pro-Vice Chancellor IGNOU, Delhi MEMBERS Prof. B.B. Tripathi Prof...
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...Chapter 1, Introduction CHAPTER 1 Conceptual Problems C1. A room in a house has a floor area of 120 ft2. Which of the following is most likely the approximate volume of the room? a. 3 m3 b. 30 m3 c. 300 m3 d. 3 000 m3 C2. When SI units are plugged into an equation, it is found that the units balance. Which of the following can we expect to be true for this equation? a. The equation will be dimensionally correct. b. The equation will be dimensionally correct except sometimes in cases when the right hand side of the equation has more than one term. c. The equation will not be dimensionally correct. d. All constants of proportionality will be correct. C3. How long has it been that scientists have accepted that the nucleus of the atom consists of neutrons and protons? Think of your answers in terms of order of magnitude. a. about a decade b. about a century c. about a thousand years d. since Aristotle C4. Consider the sine of any angle between 30° and 40°. If the angle were doubled, what would happen to the sine of the angle? a. It would double. b. It would more than double. c. It would increase but be less than double. d. In different cases, it could do any of the above. C5. There are other ways of expressing uncertainty besides significant figures. For example, suppose a quantity is known to have a value between 20.4 and 20.0 and our best estimate of the value is midrange at 20.2. We could write the number as 20.2 +/- 0.2 and say that the number has a 1% uncertainty. We would...
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...Three Ghost Stories Charles Dickens This eBook was designed and published by Planet PDF. For more free eBooks visit our Web site at http://www.planetpdf.com/. To hear about our latest releases subscribe to the Planet PDF Newsletter. Three Ghost Stories THE SIGNAL-MAN ‘Halloa! Below there!’ When he heard a voice thus calling to him, he was standing at the door of his box, with a flag in his hand, furled round its short pole. One would have thought, considering the nature of the ground, that he could not have doubted from what quarter the voice came; but instead of looking up to where I stood on the top of the steep cutting nearly over his head, he turned himself about, and looked down the Line. There was something remarkable in his manner of doing so, though I could not have said for my life what. But I know it was remarkable enough to attract my notice, even though his figure was foreshortened and shadowed, down in the deep trench, and mine was high above him, so steeped in the glow of an angry sunset, that I had shaded my eyes with my hand before I saw him at all. ‘Halloa! Below!’ From looking down the Line, he turned himself about again, and, raising his eyes, saw my figure high above him. ‘Is there any path by which I can come down and speak to you?’ 2 of 97 Three Ghost Stories He looked up at me without replying, and I looked down at him without pressing him too soon with a repetition of my idle question. Just then there came a vague vibration in the...
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...BRE Building Elements Foundations, basements and external works Performance, diagnosis, maintenance, repair and the avoidance of defects H W Harrison, ISO, Dip Arch, RIBA P M Trotman BRE Garston Watford WD25 9XX Prices for all available BRE publications can be obtained from: CRC Ltd 151 Rosebery Avenue London, EC1R 4GB Tel: 020 7505 6622 Fax: 020 7505 6606 email: crc@construct.emap.co.uk BR 440 ISBN 1 86081 540 5 © Copyright BRE 2002 First published 2002 BRE is committed to providing impartial and authoritative information on all aspects of the built environment for clients, designers, contractors, engineers, manufacturers, occupants, etc. We make every effort to ensure the accuracy and quality of information and guidance when it is first published. However, we can take no responsibility for the subsequent use of this information, nor for any errors or omissions it may contain. Published by Construction Research Communications Ltd by permission of Building Research Establishment Ltd Requests to copy any part of this publication should be made to: CRC Ltd Building Research Establishment Bucknalls Lane Watford, WD25 9XX BRE material is also published quarterly on CD Each CD contains BRE material published in the current year, including reports, specialist reports, and the Professional Development publications: Digests, Good Building Guides, Good Repair Guides and Information Papers. The CD collection gives you the opportunity to build a comprehensive library...
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...RICK RIORDAN THE CROWN of PTOLEMY A Percy Jackson/Kane Chronicles Adventure PUFFIN Contents The Crown of Ptolemy ABOUT THE AUTHOR Rick Riordan is the creator of the award-winning, bestselling Percy Jackson series and the thrilling Kane Chronicles and Heroes of Olympus series. Don’t miss his new series: Magnus Chase and the Gods of Asgard. According to Rick, the idea for the Percy Jackson stories was inspired by his son Haley. But rumour has it that Camp Half-Blood actually exists, and Rick spends his summers there recording the adventures of young demigods. Some believe that, to avoid a mass panic among the mortal population, he was forced to swear on the River Styx to present Percy Jackson’s story as fiction. Rick lives in Boston, Massachussetts, (apart from his summers on Half-Blood Hill) with his wife and two sons. To learn more about Rick and the Percy Jackson and Kane Chronicles series, visit: www.rickriordanmythmaster.co.uk The Crown of Ptolemy ‘CARTER!’ I SHOUTED. Nothing happened. Next to me, pressed against the wall of the old fort, Annabeth peered into the rain, waiting for magical teenagers to fall out of the sky. ‘Are you doing it right?’ she asked me. ‘Gee¸ I dunno. I’m pretty sure his name is pronounced Carter.’ ‘Try tapping the hieroglyph multiple times.’ ‘That’s stupid.’ ‘Just try it.’ I stared at my hand. There wasn’t even a trace of the hieroglyph that Carter Kane had drawn on my palm almost two months back. He’d...
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