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Robust Classification Method for Underwater Targets Using the Chaotic Features of the Flow Field
Journal of Marine Science and Engineering Article Robust Classification Method for Underwater Targets Using the Chaotic Features of the Flow Field Xinghua Lin 1, Jianguo Wu 1,* and Qing Qin 2 1 School of Mechanical Engineering, Hebei University of Technology, Tianjin 300401, China; [email protected] 2 China Automotive Technology and Research Center Co., Ltd, Tianjin 300300, China; [email protected] * Correspondence: [email protected] Received: 17 January 2020; Accepted: 10 February 2020; Published: 12 February 2020 Abstract: Fish can sense their surrounding environment by their lateral line system (LLS). In order to understand the extent to which information can be derived via LLS and to improve the adaptive ability of autonomous underwater vehicles (AUVs), a novel strategy is presented, which directly uses the information of the flow field to distinguish the object obstacle. The flow fields around different targets are obtained by the numerical method, and the pressure signal on the virtual lateral line is studied based on the chaos theory and fast Fourier transform (FFT). The compounded parametric features, including the chaotic features (CF) and the power spectrum density (PSD), which is named CF-PSD, are used to recognize the kinds of obstacles. During the research of CF, the largest Lyapunov exponent (LLE), saturated correlation dimension (SCD), and Kolmogorov entropy (KE) are taken into account, and PSD features include the number, amplitude, and position of wave crests. A two-step support vector machine (SVM) is built and used to classify the shapes and incidence angles based on the CF-PSD. It is demonstrated that the flow fields around triangular and square targets are chaotic systems, and the new findings indicate that the object obstacle can be recognized directly based on the information of the flow field, and the consideration of a parametric feature extraction method (CF-PSD) results in considerably higher classification success. -
Engineering the Quantum Foam
Engineering the Quantum Foam Reginald T. Cahill School of Chemistry, Physics and Earth Sciences, Flinders University, GPO Box 2100, Adelaide 5001, Australia [email protected] _____________________________________________________ ABSTRACT In 1990 Alcubierre, within the General Relativity model for space-time, proposed a scenario for ‘warp drive’ faster than light travel, in which objects would achieve such speeds by actually being stationary within a bubble of space which itself was moving through space, the idea being that the speed of the bubble was not itself limited by the speed of light. However that scenario required exotic matter to stabilise the boundary of the bubble. Here that proposal is re-examined within the context of the new modelling of space in which space is a quantum system, viz a quantum foam, with on-going classicalisation. This model has lead to the resolution of a number of longstanding problems, including a dynamical explanation for the so-called `dark matter’ effect. It has also given the first evidence of quantum gravity effects, as experimental data has shown that a new dimensionless constant characterising the self-interaction of space is the fine structure constant. The studies here begin the task of examining to what extent the new spatial self-interaction dynamics can play a role in stabilising the boundary without exotic matter, and whether the boundary stabilisation dynamics can be engineered; this would amount to quantum gravity engineering. 1 Introduction The modelling of space within physics has been an enormously challenging task dating back in the modern era to Galileo, mainly because it has proven very difficult, both conceptually and experimentally, to get a ‘handle’ on the phenomenon of space. -
Hyperbolic Prism, Poincaré Disc, and Foams
Hyperbolic Prism, Poincaré Disc, and Foams 1 1 Alberto Tufaile , Adriana Pedrosa Biscaia Tufaile 1 Soft Matter Laboratory, Escola de Artes, Ciências e Humanidades, Universidade de São Paulo, São Paulo, Brazil (E-mail: [email protected]) Abstract. The hyperbolic prism is a transparent optical element with spherical polished surfaces that refracts and reflects the light, acting as an optical element of foam. Using the hyperbolic prism we can face the question: is there any self-similarity in foams due to light scattering? In order to answer this question, we have constructed two optical elements: the hyperbolic kaleidoscope and the hyperbolic prism. The key feature of the light scattering in such elements is that this phenomenon is chaotic. The propagation of light in foams creates patterns which are generated due to the reflection and refraction of light. One of these patterns is observed by the formation of multiple mirror images inside liquid bridges in a layer of bubbles in a Hele-Shaw cell. We have observed the existence of these patterns in foams and their relation with hyperbolic geometry using the Poincaré disc model. The images obtained from the experiment in foams are compared to the case of hyperbolic optical elements, and there is a fractal dimension associated with the light scattering which creates self-similar patterns Keywords: Hyperbolic Prism, Poincaré Disc, Foams, Kaleidoscope. 1 Introduction Physically based visualization of foams improves our knowledge of optical systems. As long as the light transport mechanisms for light scattering in foams are understood, some interesting patterns observed can be connected with some concepts involving hyperbolic geometry, and this study involves mainly the classical scattering of light in foams and geometrical optics. -
Modelling and Simulation of Acoustic Absorption of Open Cell Metal Foams
Modelling and Simulation of Acoustic Absorption of Open Cell Metal Foams Claudia Lautensack, Matthias Kabel Fraunhofer ITWM, Kaiserslautern Abstract We analyse the microstructure of an open nickel-chrome foam using computed tomography. The foam sample is modelled by a random Laguerre tessellation, i.e. a weighted Voronoi tessellation, which is fitted to the original structure by means of geometric characteristics estimated from the CT image. Using the Allard-Johnson model we simulate the acoustic absorption of the real foam and the model. Finally, simulations in models with a larger variation of the cell sizes yield first results for the dependence of acoustic properties on the geometric structure of open cell foams. 1. Introduction Open cell metal foams are versatile materials which are used in many application areas, e.g. as heat exchangers, catalysts or sound absorbers. The physical properties of a foam are highly affected by its microstructure, for instance the porosity or the specific surface area of the material or the size and shape of the foam cells. An understanding of the change of the foam’s properties with altering microstructure is crucial for the optimisation of foams for certain applications. Foam models from stochastic geometry are powerful tools for the investigation of these relations. Edge systems of random tessellations are often used as models for open foams. Geometric characteristics which are estimated from tomographic images of the foams are used for fitting the models to real data. Realisations of foams with slightly modified microstructure can then be generated by changing the model parameters. Numerical simulations in these virtual foam samples allow for an investigation of relations between the geometric structure of a material and its physical properties. -
Crystalclear® Foam-B-Gone
® Airmax® Inc. CrystalClear Foam-B-Gone 15425 Chets Way, Armada, MI 48005 Phone: 866-424-7629 Safety Data Sheet www.airmaxeco.com SECTION 1: IDENTIFICATION Product Trade Name: CrystalClear® Foam-B-Gone Date: 09-15-15 Name and/or Family or Description: Organic-inorganic mixtures Chemical Name: Anti-Foam Emulsion Chemical Formula: N/A CAS No.: N/A DOT Proper Shipping Name: Chemicals Not Otherwise Indexed (NOI) Non-Hazardous DOT Hazard Class: Not Regulated - None DOT Label: None MANUFACTURER/IMPORTER/SUPPLIER/DISTRIBUTOR INFORMATION: COMPANY NAME: Airmax®, Inc. COMPANY ADDRESS: P.O. Box 38, Romeo, Michigan 48065 COMPANY TELEPHONE: Office hours (Mon - Fri) 9:00 am to 5:00 pm (866) 424-7629 COMPANY CONTACT NAME: Main Office EMERGENCY PHONE NUMBER: Poison Control 800-222-1222 SECTION 2: HAZARD(S) IDENTIFICATION OCCUPATIONAL EXPOSURE LIMITS Ingredient Percent CAS No. PEL (Units) Hazard N/A 100% N/A N/E N/A *This product contains no hazardous ingredients according to manufacturer. *No components, present in excess of 0.1% by weight are listed as carcinogens by IARC, NTP, or OSHA *.A.R.A Information - SARA Applies – No reportable quantity to 312 / 313 / 372 SECTION 3: COMPOSITION/ INFORMATION ON INGREDIENTS INGREDIENT NAME CAS NUMBER WEIGHT % Propylene Glycol 57-55-6 1 - <3 Other components below reportable levels 90 - 100 *Designates that a specific chemical identity and/or percentage of composition has been withheld as a trade secret. SECTION 4: FIRST AID MEASURES INHALATION: Promptly remove to fresh air. Call a physician if symptoms develop or persist. SKIN: Wash skin with plenty of soap and water. -
Case Study on the United Kingdom and Brexit Juliane Itta & Nicole Katsioulis the Female Face of Right-Wing Populism and Ex
Triumph of The women? The Female Face of Right-wing Populism and Extremism 02 Case study on the United Kingdom and Brexit Juliane Itta & Nicole Katsioulis 01 Triumph of the women? The study series All over the world, right-wing populist parties continue to grow stronger, as has been the case for a number of years – a development that is male-dominated in most countries, with right-wing populists principally elected by men. However, a new generation of women is also active in right-wing populist parties and movements – forming the female face of right-wing populism, so to speak. At the same time, these parties are rapidly closing the gap when it comes to support from female voters – a new phenomenon, for it was long believed that women tend to be rather immune to right-wing political propositions. Which gender and family policies underpin this and which societal trends play a part? Is it possible that women are coming out triumphant here? That is a question that we already raised, admittedly playing devil’s advocate, in the first volume of the publication, published in 2018 by the Friedrich-Ebert-Stiftung Triumph of the women? The Female Face of the Far Right in Europe. We are now continuing this first volume with a series of detailed studies published at irregular intervals. This is partly in response to the enormous interest that this collection of research has aroused to date in the general public and in professional circles. As a foundation with roots in social democracy, from the outset one of our crucial concerns has been to monitor anti-democratic tendencies and developments, while also providing information about these, with a view to strengthening an open and democratic society thanks to these insights. -
1978-05-22 P MACHO MAN Village People RCA 7" Vinyl Single 103106 1978-05-22 P MORE LIKE in the MOVIES Dr
1978-05-22 P MACHO MAN Village People RCA 7" vinyl single 103106 1978-05-22 P MORE LIKE IN THE MOVIES Dr. Hook EMI 7" vinyl single CP 11706 1978-05-22 P COUNT ON ME Jefferson Starship RCA 7" vinyl single 103070 1978-05-22 P THE STRANGER Billy Joel CBS 7" vinyl single BA 222406 1978-05-22 P YANKEE DOODLE DANDY Paul Jabara AST 7" vinyl single NB 005 1978-05-22 P BABY HOLD ON Eddie Money CBS 7" vinyl single BA 222383 1978-05-22 P RIVERS OF BABYLON Boney M WEA 7" vinyl single 45-1872 1978-05-22 P WEREWOLVES OF LONDON Warren Zevon WEA 7" vinyl single E 45472 1978-05-22 P BAT OUT OF HELL Meat Loaf CBS 7" vinyl single ES 280 1978-05-22 P THIS TIME I'M IN IT FOR LOVE Player POL 7" vinyl single 6078 902 1978-05-22 P TWO DOORS DOWN Dolly Parton RCA 7" vinyl single 103100 1978-05-22 P MR. BLUE SKY Electric Light Orchestra (ELO) FES 7" vinyl single K 7039 1978-05-22 P HEY LORD, DON'T ASK ME QUESTIONS Graham Parker & the Rumour POL 7" vinyl single 6059 199 1978-05-22 P DUST IN THE WIND Kansas CBS 7" vinyl single ES 278 1978-05-22 P SORRY, I'M A LADY Baccara RCA 7" vinyl single 102991 1978-05-22 P WORDS ARE NOT ENOUGH Jon English POL 7" vinyl single 2079 121 1978-05-22 P I WAS ONLY JOKING Rod Stewart WEA 7" vinyl single WB 6865 1978-05-22 P MATCHSTALK MEN AND MATCHTALK CATS AND DOGS Brian and Michael AST 7" vinyl single AP 1961 1978-05-22 P IT'S SO EASY Linda Ronstadt WEA 7" vinyl single EF 90042 1978-05-22 P HERE AM I Bonnie Tyler RCA 7" vinyl single 1031126 1978-05-22 P IMAGINATION Marcia Hines POL 7" vinyl single MS 513 1978-05-29 P BBBBBBBBBBBBBOOGIE -
ME Is Not a Functional Disorder
ME Association Recipient: Sir Andrew Dillon Letter: Greetings, M.E. is not a functional disorder Comments Name Location Date Comment Carol Bryant Mottram, 2017-09-27 My daughter has ME and clearly this illness is NOT in her England, UK mind it is a physical illness Clare Crofts Rochdale, 2017-09-27 My daughter had Very Severe ME for the last 6years, was England, UK diagnosed as terminal 18 months ago and died in May this year. This disease is horrendous and needs the medical community to take it seriously Sheena young Prestatyn, 2017-09-27 M.E is not a functional disorder and should not be treated as Wales, UK such. Julie Holliday Shrewsbury, 2017-09-27 I have ME and have been treated appallingly by the NHS. England, UK Paul Winter Hailsham, 2017-09-27 I have ME. Some hospitals, such as the National England, UK Neurological Hospital in Queen Square, London, are already routinely ignoring the NICE guidelines and diagnosing people with ME as having FND. This is unacceptable given the mounting evidence that ME is a neuro-imune disease. Jane Iles Cheddar, 2017-09-27 This is too important. NICE need to look at the facts and England, UK listen to ME specialists and more importantly, the sufferers Kathie Cortese UK 2017-09-27 I have got M.E and I know it's not a " functional disorder" NICE need to use more recent up-to-date world studies, and consult with ME patients, and experts on ME Jayne Glover Warminster, 2017-09-27 I don't want other people to suffer the indignity and England, UK humiliation that I have endured for the last 15 years. -
Evanskenny PAG 2019 Doingpoliticsdifferently
Edinburgh Research Explorer Doing politics differently? Applying a feminist institutionalist lens to the U.K. Women's Equality Party Citation for published version: Evans, E & Kenny, M 2020, 'Doing politics differently? Applying a feminist institutionalist lens to the U.K. Women's Equality Party', Politics & Gender, vol. 16, no. 1, pp. 26-47. https://doi.org/10.1017/S1743923X1900045X Digital Object Identifier (DOI): 10.1017/S1743923X1900045X Link: Link to publication record in Edinburgh Research Explorer Document Version: Peer reviewed version Published In: Politics & Gender Publisher Rights Statement: This article has been accepted for publication in Politics and Gender https://www.cambridge.org/core/journals/politics-and-gender. This version is published under a Creative Commons CC-BY-NC-ND. No commercial re-distribution or re-use allowed. Derivative works cannot be distributed. © Elizabeth Evans, Meryl Kenny General rights Copyright for the publications made accessible via the Edinburgh Research Explorer 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 University of Edinburgh has made every reasonable effort to ensure that Edinburgh Research Explorer content complies with UK legislation. If you believe that the public display of this file breaches copyright please contact [email protected] providing details, and we will remove access to the work immediately and investigate your claim. Download date: 23. Sep. 2021 Doing Politics Differently? Applying a Feminist Institutionalist Lens to the UK Women’s Equality Party Elizabeth Evans and Meryl Kenny Paper accepted for publication in Politics & Gender, 21.5.2019 Abstract The UK Women’s Equality Party (WEP) was established in 2015 in order to ‘bring about change by winning – support, votes and seats’. -
New Names and Events Announced for Southbank Centre's WOW
Date: Monday 19 February 2018 Contacts: [email protected] / 020 7921 0967 [email protected] / 020 7921 0678 New names and events announced for Southbank Centre’s WOW - Women of the World festival Southbank Centre today announces new events and artist appearances for its WOW - Women of the World festival, supported by Bloomberg, including a Clarence House International Women's Day reception with the Duchess of Cornwall, performance from Laura Mvula as part of Women on the Move Awards, an exclusive Tatty Devine partnership and ‘How to change the world in a day’ event for more than 200 London school girls. From 7-11 March, Southbank Centre’s annual flagship festival, WOW - Women of the World, brings together leading voices across culture, business, politics, art and activism for a packed programme of enlightening talks, debates, music, comedy, poetry and networking, celebrating womankind. New names featured in this year’s line-up include: Diane Abbott, Sughra Ahmed, Nazeem Akhter, Diane Atkinson, Dane Baptiste, Cally Beaton, Hermon and Heroda Berhane, Sophia Blackwell, Malia Bouattia, Rosie Boycott, Nina Brochmann, Victoria Adukwei Bulley, Christine Burns, Gemma Cairney, Jen Campbell, Angela Clerkin, Michelle Daley, Caitlin Davis, Stacey Dooley, Reni Eddo-Lodge, V.A Fearon, Janie Galloway, Emma Gannon, Carrie Gracie, Professor Jacqui Gibb, Ayesha Hazarika, Afua Hirsch, Dame Vivian Hunt, Libby Jackson, Mariéme Jamme, Baroness Helena Kennedy, -
MAKING CHANGE HAPPEN! 7 – 9 September Kettering
MAKING CHANGE HAPPEN! 7 – 9 September Kettering ConferenCe ISSUe Hosted by Sandi Toksvig CONTENTS 04 Message from Women’s equality Party Leader 05 Welcome from Women’s equality Party Co-founders 07 Timetable at a glance FOUR PLAY AT 08 & 46 Making change happen 10-11 About the Women’s equality Party 12 About party conference CONFERENCE 13 Map of Kettering 14 - 15 Your guide to conference 16 - 17 Four Steps to taking part in Party Business 18 Kettering Conference Centre floor plan 22 Day 1: What’s on the agenda 23 - 29 Day 2: What’s on the agenda 30 - 31 Day 3: What’s on the agenda 34 Visitor experience Sophie Willan e velyn Mok Sophie Duker Ada Campe 35 Food Stalls Sophie Willan makes nominated for Female Sophie Duker describes Ada Campe’s act blends bold, unapologetic work Comedian of the Year herself as a “sexy- comedy, magic, regret 36 - 37 Exhibitors that is raucously funny and Show of the Year at cerebral comedy and shouting. A devotee and completely original. the 2017 Swedish Stand- underdog” and is quickly of variety and caba- 38 - 40 Who’s who: Women’s equality Party team Her work is political to Up gala, evelyn mok is establishing herself as ret, she has performed the core, but it doesn’t the best thing to come one of the most exciting throughout the UK for feel like it. out of Sweden since… new acts on the circuit. years. 41 - 45 Who’s who: Conference speakers @sophiewillan iKeA? @sophiedukebox @AdaCampe @evelynMok WOMEN’S EQUALITY 7:30pm PARTY COMEDY NIGHT Saturday 8 September 2 womensequality.org.uk Conference ISSUe 2 3 Welcome to the Women’s Equality Party’s second-ever party conference and to Kettering, a town famous according to its Conservative MP Philip Hollobone “as the home of Weetabix breakfast cereal”. -
Graphs in Nature
Graphs in Nature David Eppstein University of California, Irvine Algorithms and Data Structures Symposium (WADS) August 2019 Inspiration: Steinitz's theorem Purely combinatorial characterization of geometric objects: Graphs of convex polyhedra are exactly the 3-vertex-connected planar graphs Image: Kluka [2006] Overview Cracked surfaces, bubble foams, and crumpled paper also form natural graph-like structures What properties do these graphs have? How can we recognize and synthesize them? I. Cracks and Needles Motorcycle graphs: Canonical quad mesh partitioning Problem: partition irregular quad-mesh into regular submeshes [Eppstein et al. 2008] Inspiration: Light cycle game from TRON movies Mesh partitioning method Grow cut paths outwards from each irregular (non-degree-4) vertex Cut paths continue straight across regular (degree-4) vertices They stop when they run into another path Result: approximation to optimal partition (exact optimum is NP-complete) Mesh-free motorcycle graphs Earlier... Motorcycles move from initial points with given velocities When they hit trails of other motorcycles, they crash [Eppstein and Erickson 1999] Application of mesh-free motorcycle graphs Initially: A simplified model of the inward movement of reflex vertices in straight skeletons, a rectilinear variant of medial axes with applications including building roof construction, folding and cutting problems, surface interpolation, geographic analysis, and mesh construction Later: Subroutine for constructing straight skeletons of simple polygons [Cheng and Vigneron 2007; Huber and Held 2012] Image: Huber [2012] Construction of mesh-free motorcycle graphs Main ideas: Define asymmetric distance: Time when one motorcycle would crash into another's trail Repeatedly find closest pair and eliminate crashed motorcycle Image: Dancede [2011] O(n17=11+) [Eppstein and Erickson 1999] Improved to O(n4=3+) [Vigneron and Yan 2014] Additional log speedup using mutual nearest neighbors instead of closest pairs [Mamano et al.