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Commission 27 of the Iau Information Bulletin
COMMISSION 27 OF THE I.A.U. INFORMATION BULLETIN ON VARIABLE STARS Nos. 2401 - 2500 1983 September - 1984 March EDITORS: B. SZEIDL AND L. SZABADOS, KONKOLY OBSERVATORY 1525 BUDAPEST, Box 67, HUNGARY HU ISSN 0374-0676 CONTENTS 2401 A POSSIBLE CATACLYSMIC VARIABLE IN CANCER Masaaki Huruhata 20 September 1983 2402 A NEW RR-TYPE VARIABLE IN LEO Masaaki Huruhata 20 September 1983 2403 ON THE DELTA SCUTI STAR BD +43d1894 A. Yamasaki, A. Okazaki, M. Kitamura 23 September 1983 2404 IQ Vel: IMPROVED LIGHT-CURVE PARAMETERS L. Kohoutek 26 September 1983 2405 FLARE ACTIVITY OF EPSILON AURIGAE? I.-S. Nha, S.J. Lee 28 September 1983 2406 PHOTOELECTRIC OBSERVATIONS OF 20 CVn Y.W. Chun, Y.S. Lee, I.-S. Nha 30 September 1983 2407 MINIMUM TIMES OF THE ECLIPSING VARIABLES AH Cep AND IU Aur Pavel Mayer, J. Tremko 4 October 1983 2408 PHOTOELECTRIC OBSERVATIONS OF THE FLARE STAR EV Lac IN 1980 G. Asteriadis, S. Avgoloupis, L.N. Mavridis, P. Varvoglis 6 October 1983 2409 HD 37824: A NEW VARIABLE STAR Douglas S. Hall, G.W. Henry, H. Louth, T.R. Renner 10 October 1983 2410 ON THE PERIOD OF BW VULPECULAE E. Szuszkiewicz, S. Ratajczyk 12 October 1983 2411 THE UNIQUE DOUBLE-MODE CEPHEID CO Aur E. Antonello, L. Mantegazza 14 October 1983 2412 FLARE STARS IN TAURUS A.S. Hojaev 14 October 1983 2413 BVRI PHOTOMETRY OF THE ECLIPSING BINARY QX Cas Thomas J. Moffett, T.G. Barnes, III 17 October 1983 2414 THE ABSOLUTE MAGNITUDE OF AZ CANCRI William P. Bidelman, D. Hoffleit 17 October 1983 2415 NEW DATA ABOUT THE APSIDAL MOTION IN THE SYSTEM OF RU MONOCEROTIS D.Ya. -
Nasa Tm X-1864 *
NASA TECHNICAL. • £HP2fKit NASA TM X-1864 * ... MEMORANDUM oo fe *' > ;ff f- •* '• . ;.*• f PROPULSION • FOR *MANN1D E30PLORATION-k '* *Of THE SOEAE " • » £ Moedkel • - " *' ' ' y Lem$ Research Center Cleveland, Qbt® NATIONAL AERONAUTICS AND SFACE ADMINISTRATION • WASHINGTON, D. €, * AUCUST 1969 NASA TM X-1864 PROPULSION SYSTEMS FOR MANNED EXPLORATION OF THE SOLAR SYSTEM By W. E. Moeckel Lewis Research Center Cleveland, Ohio NATIONAL AERONAUTICS AND SPACE ADMINISTRATION For sale by the Clearinghouse for Federal Scientific and. Technical Information Springfield, Virginia 22151 - CFSTI price $3.00 ABSTRACT What propulsion systems are in sight for fast interplanetary travel? Only a few show promise of reducing trip times to values comparable to those of 16th century terrestrial expeditions. The first portion of this report relates planetary round-trip times to the performance parameters of two types of propulsion systems: type I is specific-impulse limited (with high thrust), and type n is specific-mass limited (with low thrust). The second part of the report discusses advanced propulsion concepts of both types and evaluates their limitations. The discussion includes nuclear-fission . rockets (solid, liquid, and gaseous core), nuclear-pulse propulsion, nuclear-electric rockets, and thermonuclear-fusion rockets. Particular attention is given to the last of these, because it is less familiar than the others. A general conclusion is that the more advanced systems, if they prove feasible, will reduce trip time to the near planets by factors of 3 to 5, and will make several outer planets accessible to manned exploration. PROPULSION SYSTEMS FOR MANNED EXPLORATION OF THE SOLAR SYSTEM* byW. E. Moeckel Lewis Research Center SUMMARY What propulsion systems are in sight for fast interplanetary travel? Only a few show promise of reducing trip times to values comparable to those of 16th century terrestrial expeditions. -
Pulsed Fusion Space Propulsion: Computational Ideal Magneto-Hydro Dynamics of a Magnetic Flux Compression Reaction Chamber
Pulsed Fusion Space Propulsion: Computational Ideal Magneto-Hydro Dynamics of a Magnetic Flux Compression Reaction Chamber G. Romanelli Master of Science Thesis Space Systems Engineering PULSED FUSION SPACE PROPULSION: COMPUTATIONAL IDEAL MAGNETO-HYDRO DYNAMICS OFA MAGNETIC FLUX COMPRESSION REACTION CHAMBER by Gherardo ROMANELLI to obtain the degree of Master of Science at the Delft University of Technology, to be defended publicly on Friday February 26, 2016 at 10:00 AM. Student number: 4299876 Thesis committee: Dr. A. Cervone, TU Delft, supervisor Prof. Dr. E. K. A. Gill, TU Delft Dr. Ir. E. Mooij, TU Delft Prof. A. Mignone, Politecnico di Torino An electronic version of this thesis is available at http://repository.tudelft.nl/. To boldly go where no one has gone before. James T. Kirk ACKNOWLEDGEMENTS First of all I would like to thank my supervisor Dr. A. Cervone who has always sup- ported me despite my “quite exotic” interests. He left me completely autonomous in shaping my thesis project, and still, was always there every time I needed help. Then, I would of course like to thank Prof. A. Mignone who decided to give his contribute to this seemingly crazy project of mine. His advice arrived just in time to give an happy ending to this story. Il ringraziamento più grande, però, va di certo alla mia famiglia. Alla mia mamma e a mio babbo, perché hanno sempre avuto fiducia in me e non hanno mai chiesto ragioni o spiegazioni alle mie scelte. Ai miei nonni, perché se di punto in bianco, un giorno di novembre ho deciso di intraprendere questa lunga strada verso l’Olanda, l’ho potuto fare anche per merito loro. -
In a Comprehensive New Test, the Emdrive Fails to Generate Any Thrust 7 April 2021, by Paul M
In a comprehensive new test, the EmDrive fails to generate any thrust 7 April 2021, by Paul M. Sutter conservation of momentum has been tested countless times over centuries—in fact, that principle forms the bedrock of almost every single theory of physics. So in essence, almost every time physics is tested, so is the conservation of momentum. The results of the Eagleworks experiment were not very strong. While the team claimed to measure a thrust, it wasn't statistically significant, and appeared to be a result of "cherry-picking"—the authors watching random fluctuations and waiting for the right time to report their results. But in the spirit of scientific replication, a team at the Dresden University of Technology led by Prof. Martin Tajmar rebuilt the Eagleworks experimental The EmDrive is a hypothetical rocket that setup. proponents claim can generate thrust with no exhaust. This would violate all known physics. In And they found squat. 2016, a team at NASA's Eagleworks lab claimed to measure thrust from an EmDrive device, the news Reporting their results in the Proceedings of Space of which caused quite a stir. The latest attempt to Propulsion Conference 2020, Prof. Tajmar said, replicate the shocking results has resulted in a "We found out that the cause of the 'thrust' was a simple answer: The Eagleworks measurement was thermal effect. For our tests, we used NASAs from heating of the engine mount, not any new EmDrive configuration from White et al. (which was physics. used at the Eagleworks laboratories, because it is best documented and the results were published in The EmDrive is a relatively simple device: It's an the Journal of Propulsion and Power.) empty cavity that isn't perfectly symmetrical. -
Fudge Space Opera
Fudge Space Opera Version 0.3.0 2006-August-11 by Omar http://www.pobox.com/~rknop/Omar/fudge/spop Coprights, Trademarks, and Licences Fudge Space Opera is licenced under the Open Gaming Licence, version 1.0a; see Appendex A. Open Game License v 1.0 Copyright 2000, Wizards of the Coast, Inc. Fudge System Reference Document Copyright 2005, Grey Ghost Press, Inc.; Authors Steffan O’Sullivan, Ann Dupuis, with additional material by other authors as indicated within the text. Available for use under the Open Game License (see Appendix I) Fudge Space Opera Copyright 2005, Robert A. Knop Jr. Open Gaming Content Designation of Product Identity: Nothing herein is designated as Product Identity as outlined in section 1(e) of the Open Gaming License. Designation of Open Gaming Content: Everything herein is designated as Open Game Content as outlined in seciton 1(d) of the Open Gaming License. Fudge Space Opera -ii- Fudge Space Opera CONTENTS Contents 1 Introduction 1 1.1 Why “Space Opera”? . ......... 1 1.2 WhatisHere ........................................ .......... 2 1.3 TheMostImportantThing .............................. ............ 2 2 Character Creation 3 2.1 GeneralNotes........................................ .......... 3 2.2 5-PointFudge....................................... ........... 3 3 Combat 7 3.1 Default Combat Options . .......... 7 3.2 Basic Armor and Weapon Mechanics . ........... 7 3.3 Cross-WeaponScaleAttacks. .............. 8 3.4 Suggested Weapon Scales . ........ 9 3.5 DamagetoPassengers ................................. ............ 9 3.6 GiantSpaceBeasts.................................... ........... 9 3.7 When To Use Fudge Scale .......................................... 10 3.8 RangedWeapons....................................... ......... 11 3.9 Explosions........................................ ............ 12 3.10 Missiles and Point Defense . .............. 12 -iii- Fudge Space Opera CONTENTS 3.11 Doing Too Many Things at Once . -
Living in the Matrix: Virtual Reality Systems and Hyperspatial Representation in Architecture
Living in The Matrix: Virtual Reality Systems and Hyperspatial Representation in Architecture Kacmaz Erk, G. (2016). Living in The Matrix: Virtual Reality Systems and Hyperspatial Representation in Architecture. The International Journal of New Media, Technology and the Arts, 13-25. Published in: The International Journal of New Media, Technology and the Arts Document Version: Publisher's PDF, also known as Version of record Queen's University Belfast - Research Portal: Link to publication record in Queen's University Belfast Research Portal Publisher rights © 2016 Gul Kacmaz Erk. Available under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Public License (CC BY-NC-ND 4.0). The use of this material is permitted for non-commercial use provided the creator(s) and publisher receive attribution. No derivatives of this version are permitted. Official terms of this public license apply as indicated here: https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode General rights Copyright for the publications made accessible via the Queen's University Belfast Research Portal is retained by the author(s) and / or other copyright owners and it is a condition of accessing these publications that users recognise and abide by the legal requirements associated with these rights. Take down policy The Research Portal is Queen's institutional repository that provides access to Queen's research output. Every effort has been made to ensure that content in the Research Portal does not infringe any person's rights, or applicable UK laws. If you discover content in the Research Portal that you believe breaches copyright or violates any law, please contact [email protected]. -
Near-Death Experiences and the Theory of the Extraneuronal Hyperspace
Near-Death Experiences and the Theory of the Extraneuronal Hyperspace Linz Audain, J.D., Ph.D., M.D. George Washington University The Mandate Corporation, Washington, DC ABSTRACT: It is possible and desirable to supplement the traditional neu rological and metaphysical explanatory models of the near-death experience (NDE) with yet a third type of explanatory model that links the neurological and the metaphysical. I set forth the rudiments of this model, the Theory of the Extraneuronal Hyperspace, with six propositions. I then use this theory to explain three of the pressing issues within NDE scholarship: the veridicality, precognition and "fear-death experience" phenomena. Many scholars who write about near-death experiences (NDEs) are of the opinion that explanatory models of the NDE can be classified into one of two types (Blackmore, 1993; Moody, 1975). One type of explana tory model is the metaphysical or supernatural one. In that model, the events that occur within the NDE, such as the presence of a tunnel, are real events that occur beyond the confines of time and space. In a sec ond type of explanatory model, the traditional model, the events that occur within the NDE are not at all real. Those events are merely the product of neurobiochemical activity that can be explained within the confines of current neurological and psychological theory, for example, as hallucination. In this article, I supplement this dichotomous view of explanatory models of the NDE by proposing yet a third type of explanatory model: the Theory of the Extraneuronal Hyperspace. This theory represents a Linz Audain, J.D., Ph.D., M.D., is a Resident in Internal Medicine at George Washington University, and Chief Executive Officer of The Mandate Corporation. -
Deuterium – Tritium Pulse Propulsion with Hydrogen As Propellant and the Entire Space-Craft As a Gigavolt Capacitor for Ignition
Deuterium – Tritium pulse propulsion with hydrogen as propellant and the entire space-craft as a gigavolt capacitor for ignition. By F. Winterberg University of Nevada, Reno Abstract A deuterium-tritium (DT) nuclear pulse propulsion concept for fast interplanetary transport is proposed utilizing almost all the energy for thrust and without the need for a large radiator: 1. By letting the thermonuclear micro-explosion take place in the center of a liquid hydrogen sphere with the radius of the sphere large enough to slow down and absorb the neutrons of the DT fusion reaction, heating the hydrogen to a fully ionized plasma at a temperature of ~ 105 K. 2. By using the entire spacecraft as a magnetically insulated gigavolt capacitor, igniting the DT micro-explosion with an intense GeV ion beam discharging the gigavolt capacitor, possible if the space craft has the topology of a torus. 1. Introduction The idea to use the 80% of the neutron energy released in the DT fusion reaction for nuclear micro-bomb rocket propulsion, by surrounding the micro-explosion with a thick layer of liquid hydrogen heated up to 105 K thereby becoming part of the exhaust, was first proposed by the author in 1971 [1]. Unlike the Orion pusher plate concept, the fire ball of the fully ionized hydrogen plasma can here be reflected by a magnetic mirror. The 80% of the energy released into 14MeV neutrons cannot be reflected by a magnetic mirror for thermonuclear micro-bomb propulsion. This was the reason why for the Project Daedalus interstellar probe study of the British Interplanetary Society [2], the neutron poor deuterium-helium 3 (DHe3) reaction was chosen. -
The Dark Side of the Emdrive
The Dark Side of the EMDrive Michael Harney The current debate over the theoretical operation of the EMDrive has created a controversy that may upset our current theories of physics and if validated, gives us a gateway to space travel that we have not known before. If it is true that the EMDrive and its variants (such as the Cannae drive) are producing a tiny thrust for just the input of microwave power into a cavity without the requirement to carry any propellant into space, the promise of distant space travel is open before us. With no requirement of the storage of a propellant, the mass of a rocket ship is lowered drastically when considering distant voyages. If the mass of EMDrive and its power source (let’s say solar cells or a Plutonium battery) were only 1 Kg, for instance, it can reach a phenomenal speed in a short period of time with just a little thrust from the EMDrive. For a 1 Kg mass that is generating a thrust of 0.1 Newtons in the vacuum of space, this little ship will have a constant acceleration of 0.1 meters per second-squared and can reach 9,460,800 meters per second (about 3% the speed of light) in three years. The kinetic energy it has amounts to 89,506,736,640,000 Joules of energy, which is equivalent to a 21 Kiloton nuclear device, similar to what was dropped on Nagasaki during World War II. This is all from a 1 Kg EMDrive launched out of Earth’s gravity and directed around the solar system to increase its speed for 3 years based on currently plausible EMDrive thrusts. -
Interstellar Travel and the Fermi Paradox
Interstellar Travel If aliens haven’t visited us, could we go to them? In this lecture we will have some fun speculating about future interstellar travel by humans. Please keep in mind that, as we discussed earlier, this cannot be considered a solution for the problems that we have on Earth, for the simple reason that the expense per person is utterly prohibitive and will remain so in any conceivable future scenario. Nonetheless, given enough time it could be that we have the capacity to move out into the galaxy. Incidentally, we will leave discussions of really far-out concepts such as wormholes to a future class. Interstellar distances The major barrier to interstellar travel is the staggering distance between stars. The closest one to the Sun is Proxima Centauri, which is 4.3 light years away but not a likely host to planets. There are, however, a few possibilities within roughly 10 light years, so that is a good target. How far is 10 light years? By definition it is how far light travels in 10 years, but let’s put this into a more familiar context. A moderately brisk walking pace is 5 km/hr, and since one light year is about 10 trillion kilometers, you would need about 20 trillion hours, or about 2.3 billion years, to walk that distance. The fastest cars sold commercially go about 400 km/hr, so you would need about three billion hours or a bit less than thirty million years. The speed of the Earth in its orbit, which is comparable to the speed of the fastest spacecraft we have constructed (all unmanned, of course), is about 30 km/s and even at that rate it would take about a hundred thousand years to travel ten light years. -
Closed Complex Inertial Systems
IJIREEICE ISSN (Online) 2321-2004 ISSN (Print) 2321- 5526 International Journal of Innovative Research in Electrical, Electronics, Instrumentation and Control Engineering CAEE-2018 Conference on Advances in Electronics Engineering 2018 Thakur College of Engineering and Technology, Thakur Vol. 6, Special Issue 1, February 2018 Closed Complex Inertial Systems Anirudh Pednekar, Ankita Jha, Shubham Patil, Aditi Jain Student TE ETRX, TCET, Mumbai, India Abstract: Closed system inertial devices are the devices that can produce a one directional force that would propel any given mass relative to it and hence forth would not follow the fundamental laws of Physics. It does not produce equal and opposite reaction as it uses specific arrangement of weights that can move within the device hence forth capable of moving the body without giving an equal and opposite reaction to move the body. The best way of proving such a device is to conduct an experiment in space or in mid-air so as to have least frictional resistance and no physical contact to other solid particles as of such. Keywords: closed system, inertia, laws of physics I. INTRODUCTION Closed system means a system of engine or any physical quantity of a particular device having its propulsion medium isolated from the immediate surrounding. The body/vehicle has a special kind of device that uses peculiar type of accelerator which would use electricity for the engine hence forth has no such emission that is expelled outside the system. The system having no emission as such produces no equal and opposite reactional forces as well hence forth doesn’t follow the Newtons 3rd law of motion. -
Space and the American Imagination
https://ntrs.nasa.gov/search.jsp?R=19940030850 2020-06-16T11:10:49+00:00Z f I NASA-CR-I 96131 SPACE AND THE AMERICAN IMAGINATION.. ....... Howard E. McCurdy Outli.ne of Chapters_ N94-35356 (NASA-CR-196131) SPACE AND THE AMERICAN IMAGINATION Progress Report, Mar. - May 1994 (American Unclas Univ.) 70 p G3/99 0013686 Submitted:tothe lqati0nal Aeronautics and Space _dministration under cohtract NASW -4798 May 31, 1994 CQntents Introduction The introduction will set out the principal theme of the book: that the rise of the U.S. space program was due to a concerted effort by science writers, engineers, industrialists, and civic and political leaders to create a popular culture of space exploration based on important elements of American social life (such as frontier mythology, fears about the cold war, and the rise of the consumer culture). Much of the disillusionment with the NASA space program which set in during the third decade of space flight can be traced to a widening gap between popular expectations and the reality of space exploration. I. The influence of imagination and popular culture on public policy in general: the abolitionist movement, the regulation of food and drugs, the conservation movement, the "winged gospel," cultural fashions in psychology, and administrative reform. How popular culture inspires public policy and sets limits on the ability of public officials to carry it out. 2. Public support for space exploration: the highs and lows of public support traced through opinion polls and media coverage of the NASA space program; making the case for disenchantment. 3.