Part II EXPLOSIVES INCIDENTS ANALYSIS
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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. -
Urban Terrorism: Strategies for Mitigating Terrorist Attacks Against the Domestic Urban Environment
Old Dominion University ODU Digital Commons Theses and Dissertations in Urban Services - Urban Management College of Business (Strome) Spring 2001 Urban Terrorism: Strategies for Mitigating Terrorist Attacks Against the Domestic Urban Environment John J. Kiefer Old Dominion University Follow this and additional works at: https://digitalcommons.odu.edu/urbanservices_management_etds Part of the Public Administration Commons, Public Policy Commons, and the Urban Studies and Planning Commons Recommended Citation Kiefer, John J.. "Urban Terrorism: Strategies for Mitigating Terrorist Attacks Against the Domestic Urban Environment" (2001). Doctor of Philosophy (PhD), dissertation, , Old Dominion University, DOI: 10.25777/ 0b83-mp91 https://digitalcommons.odu.edu/urbanservices_management_etds/29 This Dissertation is brought to you for free and open access by the College of Business (Strome) at ODU Digital Commons. It has been accepted for inclusion in Theses and Dissertations in Urban Services - Urban Management by an authorized administrator of ODU Digital Commons. For more information, please contact [email protected]. URBAN TERRORISM: STRATEGIES FOR MITIGATING TERRORIST ATTACKS AGAINST THE DOMESTIC URBAN ENVIRONMENT by John J. Kiefer B.B.A. August 1975, University of Mississippi M.S.A. August 1989, Central Michigan University M.U.S. May 1997, Old Dominion University A Dissertation Submitted to the Faculty of Old Dominion University in Partial Fulfillment of the Requirement for the Degree of DOCTOR OF PHILOSOPHY URBAN SERVICES OLD DOMINION UNIVERSITY May 2001 Reviewed by: Approved by: Wol indur tfChair) College of Business and Public Administration Leonard I. Ruchelman (Member) Berhanu Mengistu^Ph.D. G. William Whitehurst (Member) Program Director Graduate Center for Urban Studies And Public Administration Reproduced with permission of the copyright owner. -
From a Technical Standpoint, What Is Firework Flash Powder?
This article originally appeared in Fireworks Business, No. 246, 2004. From a Technical Standpoint, What Is Firework Flash Powder? K. L. Kosanke and L. Weinman perature attainable in pyrotechnic reactions, only Introduction solids and liquids incandesce, gases do not. As a In a recently published article on the regulatory practical matter, metal oxides are the only pyro- definitions of firework flash powder[1] it was con- technic reaction products that are not gaseous at cluded that none of those definitions provided suf- high temperature. Thus metal fuels need to be pre- ficient information to objectively establish wheth- sent in substantial quantity in flash powders. See er or not a pyrotechnic composition is a flash Table 1, which is a list of the boiling point of powder. That is to say, those definitions are all some of the pyrotechnic reaction products. The subjective to the extent that they depend on the table has somewhat arbitrarily been divided into intended use of the composition and none provide species with boiling points above and below a quantifiable measure that can be used to deter- 2500 °C. Note that the oxides of zirconium, mag- mine whether a particular pyrotechnic composi- nesium, aluminum and titanium top the list. tion is a flash powder. The purpose of the present article is to suggest a general approach that might Table 1. Boiling Point of Some Pyrotechnic be used as the basis for producing a quantitative [2] definition of flash powder. Reaction Products. The reason such an objectively quantifiable Reaction Product Boiling Point (°C) definition is needed is that – from both a regulato- ZrO2 ≈ 5000 ry and safety standpoint – flash powders are treat- MgO 3600 ed differently than other pyrotechnic composi- Al2O3 2980 tions. -
ENCYCLOPEDIA of CHEMISTRY & EXPLOSIVES MATERIALS Abelite
ENCYCLOPEDIA OF CHEMISTRY & EXPLOSIVES MATERIALS A Abelite An explosive, composed mainly of ammonium nitrate and trinitrotoluene. Absolute Zero The least possible temperature for all substances. Generally accepted as -273.15ÝC AC Alternating current. Acceptance Quality Level (AQL) A nominal value expressed in terms of percentage defective per hundred units, by which a group of sampling plans is identified. The sampling plans so identified have a high probability of accepting lots containing material with a process average not greater than the designed value of the AQL. Acetin [CH3COOC3H5(OH)2] also known as glyceryl monoacetate, a colourless hydroscopic liquid. Used as an intermediate for various explosives, and a solvent for various dyes. Acetone [CH3COCH3] colourless, flammable liquid. Acetone is widely used in industry as a solvent for many organic substances. It is used in making synthetic Resins and fillers, smokeless powders, and many other organic compounds. Boiling Point 56ÝC. Useful solvent for acetylene, also known as the simplest saturated ketone. Acetylene or ethyne, a colourless gas and the simplest alkyne Hydrocarbon. Explosive on contact with air, it is stored dissolved under pressure in Acetone. It is used to make neoprene rubber, plastics, and resins. The oxyacetylene torch mixes and burns oxygen and acetylene to produce a very hot flame-as high as 3480ÝC (6300ÝF)-that can cut steel and weld iron and other metals. Produced by the action of wateron calcium carbide and catalytically from naphtha. Acetylide A carbide formed by bubbling acetylene through a metallic salt solution, eg cuprous acetylide, Cu2C2. These are violently explosive compounds. Acid Any substance capable of giving up a proton; a substance that ionizes in solution to give the positive ion of the solvent; a solution with a pH measurement less than 7. -
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. -
FBI 1996 US Terrorism Report
TERRoRISM in the United States 1996 Counterterrorism Threat Assessment and Warning Unit National Security Division I N T R O DUCTION United States soil was the site of three terrorist incidents during 1996. The pipe bomb explosion during the Summer Olympic Games in Centennial Olympic Park that killed two and the robberies and bombings carried out in April and July 1996 by members of a group known as the Phineas Priesthood underscored the ever-present threat that exists from individuals determined to use violence to advance particular causes. The FBI successfully prevented five planned acts of domestic terrorism in 1996. These preventions thwarted attacks on law enforcement officials, prevented planned bombings of federal buildings, and halted plots to destroy domestic infrastructure. The explosion of TWA Flight 800 over the Atlantic Ocean near Long Island, New York, on July 17, 1996, resulted in initial speculation that a terrorist attack may have been the cause and served to highlight the potential danger terrorists pose to U.S. civil aviation. The FBI, along with the National Transportation Safety Board, devoted significant resources to the criminal investigation throughout 1996. Evidence did not implicate a criminal or terrorist act by year’s-end. Threats from domestic terrorism continue to build as militia extremists, particularly those operating in the western United States, gain new adherents, stockpile weapons, and prepare for armed conflict with the federal government. The potential for domestic right-wing terrorism remains a threat. Special interest groups also endure as a threat that could surface at any time. International terrorists threaten the United States directly. -
Black Match” …………………………………………… P
Selected Pyrotechnic Publications of K.L. and B.J. Kosanke Part 5 (1998 through 2000) This book contains 134 pages Development of a Video Spectrometer …………………………………………… P. 435-445. Measurements of Glitter Flash Delay, Size and Duration ……………………… P. 446-449. Lift Charge Loss for a Shell to Remain in Mortar ……………………………… P. 450-450. Configuration and “Over-Load” Studies of Concussion Mortars ……………… P. 451-463. Quick Match – A Review and Study ……………………………………………… P. 464-479. Pyrotechnic Primes and Priming ………………………………………………… P. 480-495. Dud Shell Risk Assessment: NFPA Distances …………………………………… P. 496-499. Dud Shell Risk Assessment: Mortar Placement ………………………………… P. 500-503. Performance Study of Civil War Vintage Black Powder ……………………… P. 504-509. CAUTION: Very Fast “Black Match” …………………………………………… P. 510-512. Peak In-Mortar Aerial Shell Accelerations ……………………………………… P. 513-516. Firing Precision for Choreographed Displays …………………………………… P. 517-518. Sticky Match and Quick Match: Temperature Dependent Burn Times ……… P. 519-523. Mortar Separations in Troughs and Drums …………………………………… P. 524-530. Preliminary Study of the Effect of Ignition Stimulus on Aerial Shell Lift Performance …………………………………………………… P. 531-535. Pyrotechnic Particle Morphologies – Metal Fuels ……………………………… P. 536-542. Peak Mortar Pressures When Firing Spherical Aerial Shells …………………… P. 543-544. Indoor Pyrotechnic Electrostatic Discharge Hazard …………………………… P. 545-545. Pyrotechnic Particle Morphology – Low Melting Point Oxidizers ……………… P. 546-556. An earlier version -
1 Minnesota Statutes 2014 609.668 609.668 Explosive And
1 MINNESOTA STATUTES 2014 609.668 609.668 EXPLOSIVE AND INCENDIARY DEVICES. Subdivision 1. Definitions. For purposes of this section, the following terms have the meanings given them. (a) "Explosive device" means a device so articulated that an ignition by fire, friction, concussion, chemical reaction, or detonation of any part of the device may cause such sudden generation of highly heated gases that the resultant gaseous pressures are capable of producing destructive effects. Explosive devices include, but are not limited to, bombs, grenades, rockets having a propellant charge of more than four ounces, mines, and fireworks modified for other than their intended purpose. The term includes devices that produce a chemical reaction that produces gas capable of bursting its container and producing destructive effects. The term does not include firearms ammunition. (b) "Incendiary device" means a device so articulated that an ignition by fire, friction, concussion, detonation, or other method may produce destructive effects primarily through combustion rather than explosion. The term does not include a manufactured device or article in common use by the general public that is designed to produce combustion for a lawful purpose, including but not limited to matches, lighters, flares, or devices commercially manufactured primarily for the purpose of illumination, heating, or cooking. The term does not include firearms ammunition. (c) "Crime of violence" has the meaning given in section 624.712, subdivision 5, and also includes a domestic assault conviction when committed within the last three years or while an order for protection is active against the person, whichever period is longer. Subd. 2. -
M-80 (Explosive) - Wikipedia,Visited the Free Encyclopediaon 8/14/2015 Page 1 of 4
M-80 (explosive) - Wikipedia,visited the free encyclopediaon 8/14/2015 Page 1 of 4 M-80 (explosive) From Wikipedia, the free encyclopedia For other uses, see M80. M-80s are an American class of large firecrackers, sometimes called SALUTES.[1] The Simulator, Artillery, M-80 was originally made in the early 20th century by the U.S. military to simulate explosives or artillery fire;[2] later, M-80s were manufactured as fireworks. Traditionally, M-80s were made from a small cardboard 1 tube, often red, approximately 1 ⁄2 inches (3.8 cm) long 9 and ⁄16 inch (1.4 cm) inside diameter, with a fuse or wick coming out of the side; this type fuse is commonly known as cannon fuse or Visco fuse, after a company responsible for standardizing the product. The tubes M-80 Salute (BOOTLEG) often hold approximately 2½–3 grams of pyrotechnic flash powder; many sources state that an M-80 carries 3 grams of powder.[3] Contents ◾ 1 Legality ◾ 1.1 Canada ◾ 1.2 United States ◾ 2 Accidents ◾ 3 References ◾ 4 Further reading Legality Canada https://en.wikipedia.org/wiki/M-80_(explosive) 8/14/2015 M-80 (explosive) - Wikipedia,visited the free encyclopediaon 8/14/2015 Page 2 of 4 M-80s are not authorized under the law, thus making importation, possession, transportation, storage or manufacturing illegal in Canada.[4] Firecrackers, including the M-80, can be purchased from Native Reserves in Canada, as they have different governing laws. United States Due to property damages and bodily harm caused by M-80s, Class C fireworks—now known as consumer fireworks (class 1.4G), as opposed to display fireworks (which were Class B, and are now 1.3G)[5]— civilians require a license, issued by federal authorities, for pyrotechnic devices containing a charge in excess of 50 milligrams of pyrotechnic flash powder. -
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.