Fighting the Cold War at Home
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A Simple Approach to the Supernova Progenitor-Explosion Connection
A Simple Approach to the Supernova Progenitor-Explosion Connection Bernhard Müller Queen's University Belfast Monash Alexander Heger, David Liptai, Joshua Cameron (Monash University) Many potential/indirect observables from core-collapse supernovae, but some of the most direct ones (explosion energies, remnant masses) are heavy elements challenging for SN theory! massive star core-collapse supernovae neutron stars & gravitational waves neutrinos supernova remnants The neutrino-driven mechanism in its modern flavour shock ● Stalled accretion shock still oscillations (“SASI”) pushed outward to ~150km as matter piles up on the PNS, then recedes again convection ● Heating or gain region g develops some tens of ms n i t g a n after bounce e li h o o c ● Convective overturn & shock oscillations “SASI” enhance the efficiency of -heating, shock which finally revives the shock ● Big challenge: Show that this works! Status of 3D Neutrino Hydrodynamics Models with Multi-Group Transport First-principle 3D models: ● Mixed record, some failures ● Some explosions, delayed compared to 2D ● Models close to the threshold So what is missing? 27 M Hanke et al. (2013) 2 3/5 2 −3/5 ⊙ ● Lcrit ∝M˙ M 14 Ma /3 ● → Increase neutrino heating or Reynolds stresses ● Unknown/undetermined microphysics (e.g. Melson et al. 2015)? ● 20 M Melson et al. (2015) Lower explosion threshold in ⊙ SASI-dominated regime (Fernandez 2015)? 15 M⊙ Lentz et al. (2015) ● Better 1D/multi-D progenitor Or with simpler schemes: e.g. IDSA+leakage Takiwaki et al. (2014) models? Challenge: Connecting to Observables Several 50 diagnostic 10 erg with explosion sustained energy accretion . l a ) t 2 e 1 a 0 k 2 ( n Pejcha & Prieto (2015): Explosion energies a J vs. -
The United States Home Front During World War I
The United States Home Front During World War I War bonds Elaborate propaganda campaigns were launched to encourage Americans to (1914-1918, page 1 of 2) buy Liberty Bonds. Zimmerman Telegram The home front of the United States in World War I saw a systematic A 1917 diplomatic proposal from Germany encouraging Mexico to declare war on mobilization of the entire population and the entire economy to produce the the US. soldiers, food supplies, munitions, and money needed to win the war. Germany anticipated their resumption of unrestricted submarine warfare Although the United States entered the war in 1917, there had been very early in 1917 would bring the neural US into the war, so the goal was to little planning, or even recognition of the problems that the British and have Mexico preoccupy the US on their continent. other Allies had to solve on their home fronts. Germany promised money and a military alliance with Mexico, and As a result, the level of confusion was high in the first 12 months, promised them a return of the territories of Texas, New Mexico and then efficiency took control. Arizona (which were lost from Mexico between 1836-1848). Germany had been attempting to get Mexico to attack the US Key Dates: since 1914, hoping that in doing so it would cease the Lend Lease 28 July 1914 World War I begins activities. 7 May 1915 The Lusitania is sunk The proposal was intercepted and decoded by British intelligence, January 1917 The Zimmerman Telegram reveled and the revelations of the contents outraged American public February 1917 Russian Revolution begins (leaves WWI in October) opinion and helped generate support for the US declaration of April 1917 US enters World War I war on Germany in April 1917 11 November 1918 World War I ends After contemplation, Mexico rejects the proposal. -
Could a Nearby Supernova Explosion Have Caused a Mass Extinction? JOHN ELLIS* and DAVID N
Proc. Natl. Acad. Sci. USA Vol. 92, pp. 235-238, January 1995 Astronomy Could a nearby supernova explosion have caused a mass extinction? JOHN ELLIS* AND DAVID N. SCHRAMMtt *Theoretical Physics Division, European Organization for Nuclear Research, CH-1211, Geneva 23, Switzerland; tDepartment of Astronomy and Astrophysics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637; and *National Aeronautics and Space Administration/Fermilab Astrophysics Center, Fermi National Accelerator Laboratory, Batavia, IL 60510 Contributed by David N. Schramm, September 6, 1994 ABSTRACT We examine the possibility that a nearby the solar constant, supernova explosions, and meteorite or supernova explosion could have caused one or more of the comet impacts that could be due to perturbations of the Oort mass extinctions identified by paleontologists. We discuss the cloud. The first of these has little experimental support. possible rate of such events in the light of the recent suggested Nemesis (4), a conjectured binary companion of the Sun, identification of Geminga as a supernova remnant less than seems to have been excluded as a mechanism for the third,§ 100 parsec (pc) away and the discovery ofa millisecond pulsar although other possibilities such as passage of the solar system about 150 pc away and observations of SN 1987A. The fluxes through the galactic plane may still be tenable. The supernova of y-radiation and charged cosmic rays on the Earth are mechanism (6, 7) has attracted less research interest than some estimated, and their effects on the Earth's ozone layer are of the others, perhaps because there has not been a recent discussed. -
Standard Usii.7A
UU..SS.. HHiissttoorryy:: 11886655 ttoo tthhee PPrreesseenntt SSttuuddyy GGuuiiddee -- UUSS22..77 -- WWoorrlldd WWaarr IIII HISTORY AND SOCIAL SCIENCE STANDARDS OF LEARNING CURRICULUM FRAMEWORK -- 2015 STANDARDS Reformatted version created by SOLpass - www.SOLpass.org STANDARD USII..7A The student will demonstrate knowledge of the major causes and effects of American involvement in World War II by a) identifying the causes and events that led to American involvement in the war, including the attack on Pearl Harbor. Political and economic conditions in Europe following World War I led to the rise of fascism and to World War II. The rise of fascism threatened peace in Europe and Asia. As conflict grew in Europe and Asia, American foreign policy evolved from neutrality to direct involvement. Causes of World War II • Political instability and economic devastation in Europe resulting from World War I: – Worldwide depression – High war debt owed by Germany – High inflation Gradual change in American policy from neutrality to – Massive unemployment direct involvement • Political instability marked by the: • Isolationism (Great Depression, legacy of World War I) Rise of Fascism: • Economic and military aid to Allies (Lend-Lease program) – Fascism is political philosophy • Direct involvement in the war in which total power is given to a dictator; War in the Pacific – individual freedoms are denied • Rising tension developed between the United States and and nationalism and, often, Japan because of Japanese aggression in East Asia and racism are emphasized. the Pacific region.. – Fascist dictators included Adolf Hitler (Germany), Benito • On December 7, Mussolini (Italy), and Hideki Tojo (Japan). 1941, Japan – These dictators led the countries that became known as attacked the United the Axis Powers. -
The United States Home Front During World War II Essential Question
Topic: The United States Home Front During World War II Essential Question: “How important was the home front to the United States’ victory in World War II? National Standard for United States History: Era 8, Standard 3 The origins and course of World War II, the character of the war at home and abroad, and its reshaping of the United States role on world affairs. Instructional Objectives: Students will be able to: 1. Explain and evaluate extensive economic and military mobilization on the home front by the United States during World War II and its impact of the success of the war effort. 2. Explain how the whole country, across all economic and social levels, was involved in a unified effort to produce the goods of war and of the common sacrifice made by every citizen through rationing, victory gardens, bond drives, etc. 3. Analyze and assess the effects of World War II on culture, family, gender roles, and technology in American society. Background Description/Historical Significance: Although there were no military battles fought on the mainland of the United States, World War II had a profound effect on the nation as the Federal government mobilized its economic, financial, and human resources to defeat Axis aggression. This war returned the nation to economic prosperity after a decade of dismal depression, promoted the growth of big business, and enhanced a close relationship between industry and the military. Politically, the power of the presidency and influence of the Federal government increased, and socially and economically, the war, through common sacrifice made by all, became a vehicle for improving the status of Americans. -
A Counterintelligence Reader, Volume 2 Chapter 1, CI in World
CI in World War II 113 CHAPTER 1 Counterintelligence In World War II Introduction President Franklin Roosevelts confidential directive, issued on 26 June 1939, established lines of responsibility for domestic counterintelligence, but failed to clearly define areas of accountability for overseas counterintelligence operations" The pressing need for a decision in this field grew more evident in the early months of 1940" This resulted in consultations between the President, FBI Director J" Edgar Hoover, Director of Army Intelligence Sherman Miles, Director of Naval Intelligence Rear Admiral W"S" Anderson, and Assistant Secretary of State Adolf A" Berle" Following these discussions, Berle issued a report, which expressed the Presidents wish that the FBI assume the responsibility for foreign intelligence matters in the Western Hemisphere, with the existing military and naval intelligence branches covering the rest of the world as the necessity arose" With this decision of authority, the three agencies worked out the details of an agreement, which, roughly, charged the Navy with the responsibility for intelligence coverage in the Pacific" The Army was entrusted with the coverage in Europe, Africa, and the Canal Zone" The FBI was given the responsibility for the Western Hemisphere, including Canada and Central and South America, except Panama" The meetings in this formative period led to a proposal for the organization within the FBI of a Special Intelligence Service (SIS) for overseas operations" Agreement was reached that the SIS would act -
Explosive Chemical Hazards & Risk
Safe Operating Procedure (1/13) EXPLOSIVE CHEMICAL HAZARDS & RISK MINIMIZATION _____________________________________________________________________ (For assistance, please contact EHS at (402) 472-4925, or visit our web site at http://ehs.unl.edu/) Background The Globally Harmonized System (GHS) of classification and labeling of chemicals defines an explosive materials as follows: a solid or liquid substance (or mixture of substances) which is in itself capable by chemical reaction of producing gas at such temperature and pressure and at such speed as to cause damage to the surroundings. Under the GHS system, there are seven divisions for explosives. • Unstable explosives • Division 1.1 – mass explosion hazards (i.e., nearly instant detonation of the entire quantity of explosive present) • Division 1.2 – projection hazards but not mass explosion hazards • Division 1.3 – minor mass explosion or projection hazards • Divisions 1.4 through 1.6 – very insensitive substances; negligible probability of accidental initiation or propagation Explosive chemicals will be identified with the pictogram shown below. In addition, Section 2 of the Safety Data Sheet (SDS) will include one or more of the hazard statements indicated below. • H200 Unstable; explosive • H201 Explosive; mass explosion hazard • H202 Explosive; severe projection hazard • H203 Explosive; fire, blast or projection hazard • H204 Fire or projection hazard • H205 May explode in fire Scope This SOP is limited in scope to those chemicals that meet the GHS definition of an explosive. However, it is important to understand that explosions can occur with chemicals that are not considered GHS explosives. For example, an explosion can occur with large-scale polymerization of a monomer. The reaction of monomers forming polymers is exothermic. -
Blasts from the Past Historic Supernovas
BLASTS from the PAST: Historic Supernovas 185 386 393 1006 1054 1181 1572 1604 1680 RCW 86 G11.2-0.3 G347.3-0.5 SN 1006 Crab Nebula 3C58 Tycho’s SNR Kepler’s SNR Cassiopeia A Historical Observers: Chinese Historical Observers: Chinese Historical Observers: Chinese Historical Observers: Chinese, Japanese, Historical Observers: Chinese, Japanese, Historical Observers: Chinese, Japanese Historical Observers: European, Chinese, Korean Historical Observers: European, Chinese, Korean Historical Observers: European? Arabic, European Arabic, Native American? Likelihood of Identification: Possible Likelihood of Identification: Probable Likelihood of Identification: Possible Likelihood of Identification: Possible Likelihood of Identification: Definite Likelihood of Identification: Definite Likelihood of Identification: Possible Likelihood of Identification: Definite Likelihood of Identification: Definite Distance Estimate: 8,200 light years Distance Estimate: 16,000 light years Distance Estimate: 3,000 light years Distance Estimate: 10,000 light years Distance Estimate: 7,500 light years Distance Estimate: 13,000 light years Distance Estimate: 10,000 light years Distance Estimate: 7,000 light years Distance Estimate: 6,000 light years Type: Core collapse of massive star Type: Core collapse of massive star Type: Core collapse of massive star? Type: Core collapse of massive star Type: Thermonuclear explosion of white dwarf Type: Thermonuclear explosion of white dwarf? Type: Core collapse of massive star Type: Thermonuclear explosion of white dwarf Type: Core collapse of massive star NASA’s ChANdrA X-rAy ObServAtOry historic supernovas chandra x-ray observatory Every 50 years or so, a star in our Since supernovas are relatively rare events in the Milky historic supernovas that occurred in our galaxy. Eight of the trine of the incorruptibility of the stars, and set the stage for observed around 1671 AD. -
The Texas City Disaster
National Hazardous Materials Fusion Center HAZMAT HISTORY The Texas City Disaster The National Hazardous Materials Fusion Center offers Hazmat History as an avenue for responders to learn from the past and apply those lessons learned to future incidents for a more successful outcome. This coincides with the overarching mission of the Fusion Center – to improve hazmat responder safety and enhance the decision‐making process during pre‐planning and mitigation of hazmat incidents. Incident Details: Insert Location and Date Texas City, TX April 16, 1947 Hazardous Material Involved Ammonium Nitrate Fertilizer Type (mode of transportation, fixed facility) Cargo Ship Overview The morning of 16 April 1947 dawned clear and crisp, cooled by a brisk north wind. Just before 8 am, longshoremen removed the hatch covers on Hold 4 of the French Liberty ship Grandcamp as they prepared to load the remainder of a consignment of ammonium nitrate fertilizer. Some 2,086 mt (2,300 t) were already onboard, 798 (880) of which were in the lower part of Hold 4. The remainder of the ship's cargo consisted of large balls of sisal twine, peanuts, drilling equipment, tobacco, cotton, and a few cases of small ammunition. No special safety precautions were in focus at the time. Several longshoremen descended into the hold and waited for the first pallets holding the 45 kg (100 lb) packages to be hoisted from dockside. Soon thereafter, someone smelled smoke, a plume was observed rising between the cargo holds and the ship’s hull, apparently about seven or eight layers of sacks down. Neither a 3.8 L (1 gal) jug of drinking water nor the contents of two fire extinguishers supplied by crew members seemed to do much good. -
Explosives March 2017
Hazard Communication Information Sheet reflecting the US OSHA Implementation of the Globally Harmonized System of Classification and Labelling of Chemicals (GHS) Produced by the SCHC-OSHA Alliance GHS/HazCom Information Sheet Workgroup Info Explosives March 2017 How does OSHA’s Hazard Communication Standard (HCS 2012) define explosives? An explosive chemical is a solid or liquid chemical which is in itself capable by chemical reaction of producing gas at such a temperature and pressure and at such a speed as to cause damage to the surroundings. Pyrotechnic chemicals are included even when they do not evolve gases. A pyrotechnic chemical is a chemical designed to produce an effect by heat, light, sound, gas or smoke or a combination of these as the result of non-detonative self-sustaining exothermic chemical reactions. An explosive item is an item containing one or more explosive chemicals. A pyrotechnic item is an item containing one or more pyrotechnic chemicals. An unstable explosive is an explosive which is thermally unstable and/or too sensitive for normal handling, transport, or use. An intentional explosive is a chemical or item which is manufactured with a view to produce a practical explosive or pyrotechnic effect. How does HCS 2012 classify explosives? The class of explosives includes: a) explosive chemicals; b) explosive items, except devices containing explosive chemicals in such quantity or of such a character that their inadvertent or accidental ignition or initiation does not cause any effect external to the device either by projection, fire, smoke, heat or loud noise; and c) chemicals and items not included in a) and b) above which are manufactured with the view to producing a practical explosive or pyrotechnic effect. -
Chapter 2 EXPLOSIVES
Chapter 2 EXPLOSIVES This chapter classifies commercial blasting compounds according to their explosive class and type. Initiating devices are listed and described as well. Military explosives are treated separately. The ingredi- ents and more significant properties of each explosive are tabulated and briefly discussed. Data are sum- marized from various handbooks, textbooks, and manufacturers’ technical data sheets. THEORY OF EXPLOSIVES In general, an explosive has four basic characteristics: (1) It is a chemical compound or mixture ignited by heat, shock, impact, friction, or a combination of these conditions; (2) Upon ignition, it decom- poses rapidly in a detonation; (3) There is a rapid release of heat and large quantities of high-pressure gases that expand rapidly with sufficient force to overcome confining forces; and (4) The energy released by the detonation of explosives produces four basic effects; (a) rock fragmentation; (b) rock displacement; (c) ground vibration; and (d) air blast. A general theory of explosives is that the detonation of the explosives charge causes a high-velocity shock wave and a tremendous release of gas. The shock wave cracks and crushes the rock near the explosives and creates thousands of cracks in the rock. These cracks are then filled with the expanding gases. The gases continue to fill and expand the cracks until the gas pressure is too weak to expand the cracks any further, or are vented from the rock. The ingredients in explosives manufactured are classified as: Explosive bases. An explosive base is a solid or a liquid which, upon application or heat or shock, breaks down very rapidly into gaseous products, with an accompanying release of heat energy. -
(Usbdc) Explosives Incident Report (Eir) 2016
UNCLASSIFIED UNITED STATES BOMB DATA CENTER (USBDC) EXPLOSIVES INCIDENT REPORT (EIR) 2016 The Annual Explosives Incident Report (EIR) reviews bombing and explosives related incidents and threats from information reported to the United States Bomb Data Center (USBDC) through the Bomb Arson Tracking System (BATS). UNCLASSIFIED UNCLASSIFIED Table of Contents Executive Summary – 2016 ______________________________________________________________________________ 1 Explosion Incidents – 2016 ______________________________________________________________________________ 2 Recoveries – 2016 ________________________________________________________________________________________ 8 Suspicious Packages – 2016 ___________________________________________________________________________ 12 Bomb Threats – 2016 __________________________________________________________________________________ 13 Hoaxes – 2016 __________________________________________________________________________________________ 14 Explosives Thefts/Losses – 2016 _____________________________________________________________________ 16 Contact Information ____________________________________________________________________________________ 19 UNCLASSIFIED UNCLASSIFIED 2016 Explosives Incident Report (EIR) EXECUTIVE SUMMARY Executive Summary – 2016 OPERATING HIGHLIGHTS The 2016 Explosives Incident Report (EIR) is an informational product prepared by the United States Bomb Data Center (USBDC), using incident data reported in the Bomb Arson Tracking System (BATS) by its nearly 2,500 interagency