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1

Oil Spill Response and Research The 2010 Deepwater Horizon rig explosion and your health  

E-print Network

Oil Spill Response and Research The 2010 Deepwater Horizon rig explosion and your health Safety in responding to the oil spill crisis. The GuLF STUDY will help determine if oil spills, and exposure to crude the largest research enterprise ever conducted on human health and oil spills. PO Box 12233 · Research

Bezrukov, Sergey M.

2

Oil well rig with water tower  

SciTech Connect

An oil well rig having a flotatable hull and support legs which are lifted and supported by the floating hull for moving the oil well rig and moved down to engage the sea bottom and jack up or raise the hull above the water at an operating site for drilling or servicing a well or serving an offshore well platform. A water tower has pipes longitudinally mounted by brackets on each side on a beam and is mounted for vertical movement in a well in the hull. An elevator mechanism mounted in the hull is employed to raise and lower the water tower which has guide means fitting a guide portion of the well to provide guided vertical movement of the water tower. When the water tower is lowered, a pump at the bottom of the pipe pumps sea water through the pipe to machinery on the hull to meet the water requirements of the machinery.

Younes, D. T.

1984-09-18

3

HURRICANE PREDICTION, OIL RIGS, AND INSURANCE: KATRINA, RITA, AND BEYOND  

E-print Network

HURRICANE PREDICTION, OIL RIGS, AND INSURANCE: KATRINA, RITA, AND BEYOND LUNCHEON BRIEFING the recent images of Katrina and Rita marching in relentless slow motion toward the Gulf Coast and know industries. In the days after Katrina, Senator DeMint stated, "After reviewing the actions taken

4

Inventory management of steel plates at an oil rig construction company  

E-print Network

Keppel Fels produces make-to-order oil exploration rigs for the global market. Each rig requires close to 6000 metric tons of steel in the course of its production. Optimal management of this steel is very critical in this ...

Tan, Chien Yung

2006-01-01

5

Fire and explosion hazards of oil shales  

SciTech Connect

This publication presents the results of investigations into the fire and explosion hazards of oil shale rocks and dust. Three areas have been examined: the explosibility and ignitability of oil shale dust clouds, the fire hazards of oil shale dust layers on hot surfaces, and the ignitability and extinguishment of oil shale rubble piles.

Not Available

1989-01-01

6

Work related diseases and injuries on an oil rig.  

PubMed

The analysis of diseases and injuries in the workers on an American oil rig, operating in the Mediterranean Sea, was done in the period of one year, from 1 May 1996 to 1 May 1997. In total, 518 medical examinations of sick and injuried workers were conducted. At the first place in morbidity, there were injuries and poisonings (26.7% of all registered cases). Then followed musculo-skeletal (17.5%), respiratory (14.2%), gastrointestinal diseases (12.1%), mental disorders (10.3%), nervous system (9.2%), skin (6.5%), urogenital (2.9%) and circulatory system diseases (0.6%). Out of all cases, the hand and finger injuries (48.3%) were most frequent, followed by injuries of the leg (13.4%), eye (11.3%), head and neck (10.1%), arm (7.9%), foot (6.7%) and trunk (2.3%). To reduce the incidence of diseases and injuries, special attention should be paid to the workers' basic medical education, to protective measures and providing first aid at the work site. PMID:16532585

Valenti?, Damir; Stojanovi?, Drazen; Mi?ovi?, Vladimir; Vukeli?, Mihovil

2005-01-01

7

A New High-Speed Oil-Free Turbine Engine Rotordynamic Simulator Test Rig  

NASA Technical Reports Server (NTRS)

A new test rig has been developed for simulating high-speed turbomachinery rotor systems using Oil-Free foil air bearing technology. Foil air bearings have been used in turbomachinery, primarily air cycle machines, for the past four decades to eliminate the need for oil lubrication. The goal of applying this bearing technology to other classes of turbomachinery has prompted the fabrication of this test rig. The facility gives bearing designers the capability to test potential bearing designs with shafts that simulate the rotating components of a target machine without the high cost of building "make-and-break" hardware. The data collected from this rig can be used to make design changes to the shaft and bearings in subsequent design iterations. This paper describes the new test rig and demonstrates its capabilities through the initial run with a simulated shaft system.

Howard, Samuel A.

2007-01-01

8

Heavy oil recovery using solvents and explosives  

Microsoft Academic Search

Petroleum-recovery techniques are being developed for the many shallow, low-productivity, heavy-oil sand deposits in southeastern Kansas, southwestern Missouri, and northeastern Oklahoma. In 1971, laboratory flooding experiments were conducted to determine optimum field operating conditions for recovery of heavy oil. Concurrently the Research Center began a field experiment in Labette County, Kans., using a recovery method (SolFrac) that combines chemical-explosive fracturing,

L. J. Heath; F. S. Johnson; J. S. Miller; R. A. Jones; W. D. McMurtrie

1977-01-01

9

Material Response from Mach 0.3 Burner Rig Combustion of a Coal-Oil Mixture.  

National Technical Information Service (NTIS)

Wedge shaped specimens were exposed to the combustion gases of a Mach 0.3 burner rig fueled with a mixture of 40 weight percent micron size coal particles dispersed in No. 2 fuel oil. Exposure temperature was about 900 C and the test duration was about 44...

G. J. Santoro, F. D. Calfo, F. J. Kohl

1981-01-01

10

Water-in-oil emulsion explosive composition  

SciTech Connect

A water-in-oil emulsion explosive composition which has enhanced storage stability is described. The explosive composition comprises a disperse phase formed of an aqueous oxidizer solution consisting of (1) ammonium nitrate or a mixture of ammonium nitrate and another oxidizer salt, (2) water and (3) a specifically limited weak acid salt or condensed phosphate, (4) a continuous phase consisting of fuel oil and/or wax, (5) an emulsifier, and (6) hollow microspheres or microbubbles. The weak acid salts consist of lithium, sodium, potassium, calcium, and ammonium salts of carbonic acid, boric acid, acetic acid, silicic acid, and citric acid. As the condensed phosphates, use is made of orthophosphates, polyphosphates, metaphosphates, and ultraphosphates. 6 claims.

Takeuchi, F.; Takahashi, M.

1983-07-19

11

Procedure-Authoring Tool Improves Safety on Oil Rigs  

NASA Technical Reports Server (NTRS)

Dark, cold, and dangerous environments are plentiful in space and on Earth. To ensure safe operations in difficult surroundings, NASA relies heavily on procedures written well ahead of time. Houston-based TRACLabs Inc. worked with Ames Research Center through the SBIR program to create an electronic procedure authoring tool, now used by NASA and companies in the oil and gas industry.

2014-01-01

12

Shift type and season affect adaptation of the 6-sulphatoxymelatonin rhythm in offshore oil rig workers  

Microsoft Academic Search

Previously we have shown that the 6-sulphatoxymelatonin rhythm of oil rig workers on a 2-week night shift (1800–0600 h) adapts to the shift via a phase delay. We now report the findings of a study on two offshore drill crews working a 1 week day (1200–0000 h), 1 week night (0000–1200 h) swing shift. Urine samples were collected every 2–3

R. G Barnes; M. J Forbes; J Arendt

1998-01-01

13

Flight investigation of helicopter IFR approaches to oil rigs using airborne weather and mapping radar  

NASA Technical Reports Server (NTRS)

Airborne weather and mapping radar is a near-term, economical method of providing 'self-contained' navigation information for approaches to offshore oil rigs and its use has been rapidly expanding in recent years. A joint NASA/FAA flight test investigation of helicopter IFR approaches to offshore oil rigs in the Gulf of Mexico was initiated in June 1978 and conducted under contract to Air Logistics. Approximately 120 approaches were flown in a Bell 212 helicopter by 15 operational pilots during the months of August and September 1978. The purpose of the tests was to collect data to (1) support development of advanced radar flight director concepts by NASA and (2) aid the establishment of Terminal Instrument Procedures (TERPS) criteria by the FAA. The flight test objectives were to develop airborne radar approach procedures, measure tracking errors, determine accpetable weather minimums, and determine pilot acceptability. Data obtained will contribute significantly to improved helicopter airborne radar approach capability and to the support of exploration, development, and utilization of the Nation's offshore oil supplies.

Bull, J. S.; Hegarty, D. M.; Phillips, J. D.; Sturgeon, W. R.; Hunting, A. W.; Pate, D. P.

1979-01-01

14

NASA Satellites View Gulf Oil Spill  

NASA Video Gallery

Two NASA satellites are capturing images of the oil spill in the Gulf of Mexico, which began April 20, 2010, with the explosion of the Deepwater Horizon oil rig. This series of images shows a space...

15

The BP Oil Spill: Could Software be a Culprit?  

Microsoft Academic Search

No one yet knows what caused the Deepwater Horizon oil rig explosion that killed 11 workers and poured millions of gallons of oil into the Gulf of Mexico. But considering the fact that offshore oil rigs comprise dozens of complex subsystems that use or are controlled by software, it is possible a software failure could have contributed to this disaster.

Don Shafer; Phillip A. Laplante

2010-01-01

16

Fire and explosion hazards of oil shale. Report of Investigations/1989  

SciTech Connect

This publication presents the results of investigations into the fire and explosion hazards of oil-shale rocks and dust. Three areas were examined: the explosibility and ignitability of oil-shale dust clouds, the fire hazards of oil-shale dust layers on hot surfaces, and the ignitability and extinguishment of oil shale rubble piles.

Not Available

1989-01-01

17

Explosion Clad for Upstream Oil and Gas Equipment  

NASA Astrophysics Data System (ADS)

Today's upstream oil and gas facilities frequently involve the combination of high pressures, high temperatures, and highly corrosive environments, requiring equipment that is thick wall, corrosion resistant, and cost effective. When significant concentrations of CO2 and/or H2S and/or chlorides are present, corrosion resistant alloys (CRA) can become the material of choice for separator equipment, piping, related components, and line pipe. They can provide reliable resistance to both corrosion and hydrogen embrittlement. For these applications, the more commonly used CRA's are 316L, 317L and duplex stainless steels, alloy 825 and alloy 625, dependent upon the application and the severity of the environment. Titanium is also an exceptional choice from the technical perspective, but is less commonly used except for heat exchangers. Explosion clad offers significant savings by providing a relatively thin corrosion resistant alloy on the surface metallurgically bonded to a thick, lower cost, steel substrate for the pressure containment. Developed and industrialized in the 1960's the explosion cladding technology can be used for cladding the more commonly used nickel based and stainless steel CRA's as well as titanium. It has many years of proven experience as a reliable and highly robust clad manufacturing process. The unique cold welding characteristics of explosion cladding reduce problems of alloy sensitization and dissimilar metal incompatibility. Explosion clad materials have been used extensively in both upstream and downstream oil, gas and petrochemical facilities for well over 40 years. The explosion clad equipment has demonstrated excellent resistance to corrosion, embrittlement and disbonding. Factors critical to insure reliable clad manufacture and equipment design and fabrication are addressed.

Banker, John G.; Massarello, Jack; Pauly, Stephane

2011-01-01

18

Explosion Clad for Upstream Oil and Gas Equipment  

SciTech Connect

Today's upstream oil and gas facilities frequently involve the combination of high pressures, high temperatures, and highly corrosive environments, requiring equipment that is thick wall, corrosion resistant, and cost effective. When significant concentrations of CO{sub 2} and/or H{sub 2}S and/or chlorides are present, corrosion resistant alloys (CRA) can become the material of choice for separator equipment, piping, related components, and line pipe. They can provide reliable resistance to both corrosion and hydrogen embrittlement. For these applications, the more commonly used CRA's are 316L, 317L and duplex stainless steels, alloy 825 and alloy 625, dependent upon the application and the severity of the environment. Titanium is also an exceptional choice from the technical perspective, but is less commonly used except for heat exchangers. Explosion clad offers significant savings by providing a relatively thin corrosion resistant alloy on the surface metallurgically bonded to a thick, lower cost, steel substrate for the pressure containment. Developed and industrialized in the 1960's the explosion cladding technology can be used for cladding the more commonly used nickel based and stainless steel CRA's as well as titanium. It has many years of proven experience as a reliable and highly robust clad manufacturing process. The unique cold welding characteristics of explosion cladding reduce problems of alloy sensitization and dissimilar metal incompatibility. Explosion clad materials have been used extensively in both upstream and downstream oil, gas and petrochemical facilities for well over 40 years. The explosion clad equipment has demonstrated excellent resistance to corrosion, embrittlement and disbonding. Factors critical to insure reliable clad manufacture and equipment design and fabrication are addressed.

Banker, John G. [Dynamic Materials Corp., 5405 Spine Rd., Boulder, CO 80301 (United States); Massarello, Jack [Global Metallix, Consultant to DMC, 5405 Spine Rd., Boulder, CO 80301 (United States); Pauly, Stephane [DMC., Nobelclad Business Unit, 1 Allee Alfred NOBEL, 66600 Rivesaltes (France)

2011-01-17

19

Ambient Pressure Test Rig Developed for Testing Oil-Free Bearings in Alternate Gases and Variable Pressures  

NASA Technical Reports Server (NTRS)

The Oil-Free Turbomachinery research team at the NASA Glenn Research Center is conducting research to develop turbomachinery systems that utilize high-speed, high temperature foil (air) bearings that do not require an oil lubrication system. Such systems combine the most advanced foil bearings from industry with NASA-developed hightemperature solid-lubricant technology. New applications are being pursued, such as Oil- Free turbochargers, auxiliary power units, and turbine propulsion systems for aircraft. An Oil-Free business jet engine, for example, would be simpler, lighter, more reliable, and less costly to purchase and maintain than current engines. Another application is NASA's Prometheus mission, where gas bearings will be required for the closed-cycle turbine based power-conversion system of a nuclear power generator for deep space. To support these applications, Glenn's Oil-Free Turbomachinery research team developed the Ambient Pressure Test Rig. Using this facility, researchers can load and heat a bearing and evaluate its performance with reduced air pressure to simulate high altitude conditions. For the nuclear application, the test chamber can be purged with gases such as helium to study foil gas bearing operation in working fluids other than air.

Bauman, Steven W.

1990-01-01

20

77 FR 39485 - Incidental Taking of Marine Mammals; Taking of Marine Mammals Incidental to the Explosive Removal...  

Federal Register 2010, 2011, 2012, 2013

...Taking of Marine Mammals Incidental to the Explosive Removal of Offshore Structures in the...take marine mammals incidental to the explosive removal of offshore oil and gas structures...regulations. Reporting ExxonMobil has not used explosives for any rig structure removal...

2012-07-03

21

RIG, rochester\\  

Microsoft Academic Search

The RIG system provides convenient access to a wide range of computing facilities. The system includes five large mini-computers in a very fast internal network, disk and tape storage, a printer\\/plotter, and a number of display terminals. These are connected to larger campus machines (IBM 360\\/65 and DEC KL10) and to the ARPANET. The operating system and other software support

E. Ball; Jerome A. Feldman; James R. Low; Richard F. Rashid; Paul Rovner

1976-01-01

22

25. Photocopied 1973 from The Rig & Reel Magazine, (March, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

25. Photocopied 1973 from The Rig & Reel Magazine, (March, 1923) p. 1. TYPICAL ENDLESS-WIRE RIG IN VOLCANO. - West Oil Company Endless Wire Pumping Station, U.S. Route 50 (Volcano vicinity), Petroleum, Ritchie County, WV

23

Method for attenuating seismic shock from detonating explosive in an in situ oil shale retort  

DOEpatents

In situ oil shale retorts are formed in formation containing oil shale by excavating at least one void in each retort site. Explosive is placed in a remaining portion of unfragmented formation within each retort site adjacent such a void, and such explosive is detonated in a single round for explosively expanding formation within the retort site toward such a void for forming a fragmented permeable mass of formation particles containing oil shale in each retort. This produces a large explosion which generates seismic shock waves traveling outwardly from the blast site through the underground formation. Sensitive equipment which could be damaged by seismic shock traveling to it straight through unfragmented formation is shielded from such an explosion by placing such equipment in the shadow of a fragmented mass in an in situ retort formed prior to the explosion. The fragmented mass attenuates the velocity and magnitude of seismic shock waves traveling toward such sensitive equipment prior to the shock wave reaching the vicinity of such equipment.

Studebaker, Irving G. (Grand Junction, CO); Hefelfinger, Richard (Grand Junction, CO)

1980-01-01

24

Method for explosive expansion toward horizontal free faces for forming an in situ oil shale retort  

DOEpatents

Formation is excavated from within a retort site in formation containing oil shale for forming a plurality of vertically spaced apart voids extending horizontally across different levels of the retort site, leaving a separate zone of unfragmented formation between each pair of adjacent voids. Explosive is placed in each zone, and such explosive is detonated in a single round for forming an in situ retort containing a fragmented permeable mass of formation particles containing oil shale. The same amount of formation is explosively expanded upwardly and downwardly toward each void. A horizontal void excavated at a production level has a smaller horizontal cross-sectional area than a void excavated at a lower level of the retort site immediately above the production level void. Explosive in a first group of vertical blast holes is detonated for explosively expanding formation downwardly toward the lower void, and explosive in a second group of vertical blast holes is detonated in the same round for explosively expanding formation upwardly toward the lower void and downwardly toward the production level void for forming a generally T-shaped bottom of the fragmented mass.

Ricketts, Thomas E. (Bakersfield, CA)

1980-01-01

25

Hybrid Bearing Prognostic Test Rig  

NASA Technical Reports Server (NTRS)

The NASA Glenn Research Center has developed a new Hybrid Bearing Prognostic Test Rig to evaluate the performance of sensors and algorithms in predicting failures of rolling element bearings for aeronautics and space applications. The failure progression of both conventional and hybrid (ceramic rolling elements, metal races) bearings can be tested from fault initiation to total failure. The effects of different lubricants on bearing life can also be evaluated. Test conditions monitored and recorded during the test include load, oil temperature, vibration, and oil debris. New diagnostic research instrumentation will also be evaluated for hybrid bearing damage detection. This paper summarizes the capabilities of this new test rig.

Dempsey, Paula J.; Certo, Joseph M.; Handschuh, Robert F.; Dimofte, Florin

2005-01-01

26

Solvents and Explosives To Recover Heavy Oil - A Pilot Demonstration  

Microsoft Academic Search

Tar sands, defined as oil-, bitumen-, asphalt-, tar-, or petroleum-impregnated rock from which little hydrocarbon material is recoverable by conventional crude oil production techniques, occur in many areas of the U.S. Some 40% of U.S. heavy-oil deposits occur in Kansas, Missouri, and Oklahoma at relatively shallow depths. A research project in Kansas by E.R.D.A.'s Bartlesville Energy Research Center combines modern

Larman Heath; John Miller; F. S. Johnson

1977-01-01

27

Gulf Oil Spill Commission Report calls for major drilling safety reforms  

Microsoft Academic Search

The BP Deepwater Horizon oil rig explosion and the resulting oil spill in the Gulf of Mexico last year were ``foreseeable and preventable,'' according to the report of a presidentially appointed commission, issued on 11 January, that recommended significant changes in U.S. government and industry practices to avoid future oil spill disasters. Among the recommendations of the National Commission on

Randy Showstack

2011-01-01

28

Evaluation and comparison of occupational noise exposure among workers on offshore and onshore oil well drilling rigs  

E-print Network

. Hynes: Rig Occupational lt s*a H*p . Tka ~D'll C* ttatt* J. 28:31 (1972) . 2. Glassburn, L. E. : Industrial Noise: Properties 8 da 1 t' . ~Md**a ~PSLD J. 60:130 (1981) . 3. Cheremisinof f, P. N. and F. Ell erbusch: Guide for Industrial Noise... Coll ingood, P. 0. Box 1425, Ann Arbor Michigan 48106 (1982). 17. Occupational Safety and Health Administration: 6*9 ty*dh tthRN1 t', h 17, ~0t'o 4 N * ~E, 1915. 95:175-176 (19747. 18. ANSI: Methods for the Measurement of 'Sound Pressure Levels...

Suarez Garcia, Humberto

2012-06-07

29

Deepwater Horizon Oil Spill: Actions Needed to Reduce Evolving but Uncertain Federal Financial Risks. Report to Congressional Requesters.  

National Technical Information Service (NTIS)

On April 20, 2010, an explosion of the Deepwater Horizon oil rig leased by BP America Production Company (BP) resulted in a significant oil spill. GAO was requested to (1) identify the financial risks to the federal government resulting from oil spills, p...

2011-01-01

30

Continuum modelling of explosive fracture in oil shale  

Microsoft Academic Search

Fracture and fragmentation studies on 80 ml\\/kg Anvil Points oil shale with plate impact, Hopkinson bar, capacitor discharge, and HE techniques have shown that the dynamic fracture stress, fracture energy, and fragment size depend on the rate of tensile loading. A model coupling fracture, fragmentation, and stress wave propagation and based on the activation and growth of an initial Weibull

D. E. Grady; M. E. Kipp

1980-01-01

31

Solvents and explosives to recover heavy oil: a pilot demonstration  

Microsoft Academic Search

The Bartlesville (Okla.) Energy Research Center, U.S. Energy Research and Development Administration, is developing petroleum-recovery techniques for the many shallow, low-productivity, heavy-oil deposits in sand of southeastern Kansas, southwestern Missouri, and northeastern Oklahoma. In 1971, laboratory experiments were conducted to determine optimum field operating conditions. Concurrently, the Research Center began a field experiment in Labette County, Kans., using a recovery

L. J. Heath; J. S. Miller; F. S. Johnson

1976-01-01

32

Explosion Clad for Upstream Oil and Gas Equipment  

Microsoft Academic Search

Today's upstream oil and gas facilities frequently involve the combination of high pressures, high temperatures, and highly corrosive environments, requiring equipment that is thick wall, corrosion resistant, and cost effective. When significant concentrations of CO2 and\\/or H2S and\\/or chlorides are present, corrosion resistant alloys (CRA) can become the material of choice for separator equipment, piping, related components, and line pipe.

John G. Banker; Jack Massarello; Stephane Pauly

2011-01-01

33

The Gulf Coast oil spill: Extending the theory of image restoration discourse to the realm of social media and beyond petroleum  

Microsoft Academic Search

The explosion of Transocean's Deepwater Horizon, an oil-rig licensed to BP, set in motion a chain of unfortunate events that led to BP's ruptured oil well disgorging millions of gallons of oil into the Gulf of Mexico. Since the spill, the corporate image of BP has been severely challenged. The company has used many strategies to preserve and restore the

Sidharth Muralidharan; Kristie Dillistone; Jae-Hwa Shin

2011-01-01

34

Social impact of the Gulf Oil Disaster: diverging views from communities in Florida and Louisiana  

Microsoft Academic Search

Carsey researchers surveyed over two thousand residents of the Gulf Coast following the BP Deepwater Horizon oil rig explosion in 2010 to analyze their perception of the spill. Nearly one-half of all Gulf Coast residents perceived damage to the environment and wildlife as the most serious result of the oil spill. Perceptions regarding the impact of the spill reflect the

Jessica D. Ulrich

2011-01-01

35

The Great Advertising Campaign: The Effectiveness of British Petroleum’s Post-Oil Spill Campaign  

Microsoft Academic Search

On April 20, 2010, one explosion on the Deepwater Horizon Oil Rig in the Gulf of Mexico caused the greatest oil spill disaster in United States history. The effects of the spill were realized almost immediately. Seafood fishers lost jobs and product, the Gulf was tainted, and people around the nation realized the damage was not going to go away

Brianne Painia

2012-01-01

36

Use of air-deployed drogued drifting buoys for oil spill tracking  

Microsoft Academic Search

The magnitude of the recent Gulf of Mexico oil spill resulting from the Macondo oil well blowout, catastrophic explosion, and subsequent sinking of the Deepwater Horizon semi-submersible offshore drilling rig is unprecedented. The complex oceanographic and environmental character of the spill location and the application of vast quantities of chemical dispersants combined to create greater challenges for those tasked with

Neha Sharma; Peter Brickley; George Owen; Patrice Coholan

2010-01-01

37

Rigging and Hoisting Job Performance Measure (TQ-RIG-P)  

E-print Network

Rigging and Hoisting Job Performance Measure (TQ-RIG-P) Candidate or Incumbent Name (Print) Life. ____________________________________________________ Completion Date for Basic Rigging Classroom Course (TQ-RIG-C or TQ-RIG-CREF) #2 operations and rigging task performance (incumbent only) by the candidate's supervisor, qualified OJT

Ohta, Shigemi

38

New generation drill rigs  

SciTech Connect

Six new drilling rigs, all designed for use under arctic conditions, are described briefly as to use, proposed location, construction company, and state of completion. Better ideas for all phases of arctic operations have been incorporated into design of these rigs. Some of the rigs are adaptable for Beaufort Sea offshore operations. (BLM)

Not Available

1980-06-01

39

Deepwater, harsh environment drilling rig supply reaches critical stage  

SciTech Connect

This paper reviews the steady decline of oil prices and the affects this is had on the construction of new deepwater drilling rigs. However, as the decline of construction in new rigs occurs, the success of deep water drilling is requiring the use of the existing drilling equipment. As a result a deepwater drilling rig shortage is anticipated. It provides data showing the amount of drilling activity going on in deepwater regions and the anticipated supply and demand for these rigs. It makes recommendations on the construction of new rigs while minimizing potential economic liabilities.

Flatern, R. von

1995-09-01

40

Public Scoping for Preparation of a Programmatic Environmental Impact Statement for the Deepwater Horizon BP Oil Spill.  

National Technical Information Service (NTIS)

On April 20, 2010 an explosion on the Deepwater Horizon MC252 drilling platform in the Gulf of Mexico caused the rig to sink, and oil began leaking into the Gulf. BP was unable to successfully cap the leak until mid-July, and millions of barrels of oil we...

2011-01-01

41

Effect of Acid, Alkali, and Steam Explosion Pretreatments on Characteristics of Bio-Oil Produced from Pinewood  

SciTech Connect

Bio-oil produced from pinewood by fast pyrolysis has the potential to be a valuable substitute for fossil fuels. Pretreatment prior to the fast pyrolysis process has been shown to alter the structure and chemical composition of biomass. To determine the influence of biomass pretreatments on bio-oil produced during fast pyrolysis, we tested three pretreatment methods: dilute acid, dilute alkali, and steam explosion. Bio-oils were produced from untreated and pretreated pinewood feedstocks in an auger reactor at 450 C. The bio-oils�¢���� physical properties including pH, water content, acid value, density, viscosity, and heating value were measured. Chemical characteristics of the bio-oils were determined by gas chromatographymass spectrometry. Results showed that bio-oil yield and composition were influenced by biomass pretreatment. Of the three pretreatment methods, 1%H2SO4 pretreatment resulted in the highest bio-oil yield and best bio-oil quality.

Wang, Hui; Srinivasan, Radhakrishnan; Yu, Fei; Steele, Philip; Li, Qi; Mitchell, Brian

2011-06-21

42

Four rigs refurbished for West Africa drilling  

SciTech Connect

In April and May 1990, Shell Petroleum Development Co. of Nigeria Ltd. awarded Noble Drilling West Africa Inc. four separate contracts to drill oil and gas wells in the inland waterways of Nigeria. The contracted rigs included a shallow water jack up, the NN-1, and three posted barges, the Gene Rosser, the Chuck Syring, and the Lewis Dugger. The jack up was built in 1978, and the three posted barges are 1980s vintage. Three of the rigs have been idle for a number of years. The Shell Nigeria contracts required major modifications to the rigs before putting them into international service. Noble replaced or refurbished all major pieces of equipment in the drilling, power, and service systems on the rigs. Rig crews serviced all other equipment. A significant amount of general service piping and electrical wiring was replaced. Each rig also required additional motor control centers to support the new drilling and mud processing equipment. Alfa-Laval waste-heat water desalination plants and new sewage treatment units were installed on all four rigs. Because of the tidal variances and high silt conditions expected in the African waterways, all engine cooling systems were converted from heat exchangers to radiators. Rotary tables were made common on all rigs at 37 1/2 in. Noble had all traveling equipment completely inspected and modified as necessary. Strict attention was paid to certification and documentation of all equipment. Safety upgrades conformed to both Shell and Noble standards. Fire and gas detection systems were installed throughout each rig. Water and foam deluge systems were installed in the wellhead areas, and new foam systems and monitors were installed on the helldecks.

Not Available

1991-06-10

43

Heavy-oil recovery using the SolFrac method. [Combination of chemical explosive fracturing and solvent injection  

Microsoft Academic Search

Petroleum-recovery techniques are being developed for the many shallow, low-productive, heavy-oil sand deposits in Kansas, Oklahoma, and Missouri. In 1971, the Bureau of Mines began a field experiment in Labette County, Kansas, using a recovery method that combines chemical explosive fracturing to create communication between wells with solvent injection to dilute the oil and lower its viscosity. Through laboratory tests,

F. S. Johnson; R. T. Johansen

1974-01-01

44

28. Photocopied 1973 from The Rig & Reel Magazine, (March, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

28. Photocopied 1973 from The Rig & Reel Magazine, (March, 1923) p. 2. INTERIOR OF CENTRAL POWERHOUSE AT VOLCANO - NOW DISMANTLED. - West Oil Company Endless Wire Pumping Station, U.S. Route 50 (Volcano vicinity), Petroleum, Ritchie County, WV

45

27. Photocopied 1973 from The Rig & Reel Magazine, (March, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

27. Photocopied 1973 from The Rig & Reel Magazine, (March, 1923) p. 5. EARLIER ENDLESS-WIRE TRANSMISSION NOW IN RUINS. - West Oil Company Endless Wire Pumping Station, U.S. Route 50 (Volcano vicinity), Petroleum, Ritchie County, WV

46

26. Photocopied 1973 from The Rig & Reel Magazine, (March, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

26. Photocopied 1973 from The Rig & Reel Magazine, (March, 1923) p. 1. TYPICAL WELL HOOK-UP. - West Oil Company Endless Wire Pumping Station, U.S. Route 50 (Volcano vicinity), Petroleum, Ritchie County, WV

47

School Kids and Oil Rigs  

Microsoft Academic Search

Shortly after Hurricane Katrina's landfall in August 2005 and the reports of rampant looting of businesses in the city, we became curious about the extent of Katrina looting as compared to that after other major storms that hit New Orleans in 1947 and in 1965. Using burglary as a proxy variable for looting, we discovered that the burglary rates in

Kelly Frailing; Jr. Dee Wood Harper

2010-01-01

48

Influence of the Deep Water Horizon Oil Spill on Atmospheric Hydrocarbon Levels over the Gulf of Mexico  

Microsoft Academic Search

The waters of the Gulf of Mexico recently were impacted negatively by the large oil spill that occurred after an explosion at the BP Deep Water Horizon rig on April 20, 2010. In response to this disaster, and out of concern for the multitude of chemical pollutants being emitted, we collected 96 air samples in the Gulf region aboard the

N. J. Blake; B. Barletta; S. Meinardi; I. Leifer; F. S. Rowland; D. R. Blake

2010-01-01

49

Oil  

NSDL National Science Digital Library

The first site, offered by the Institute of Petroleum, is called Fossils into Fuel (1). It describes how oil and gas are formed and processed, as well as offering short quizzes on each section. The second site (2) is maintained by the Department of Energy. Visitors can learn about the history of oil use, how itâÂÂs found and extracted, and more. The next site, called Picture an Oil Well (3), is a one-page illustration and description of the workings of an oil well, offered by the California Department of Conservation. The fourth site, hosted by the Minerals Management Service, is called Stacey Visits an Offshore Oil Rig (4). It tells the story of a girl taking a field trip on an offshore oil rig and what she finds when sheâÂÂs there. The Especially for Kids Web site (5) is presented by NOAA and explores facts about the effects of oil spills. Kids can do experiments, get help writing a report, find further information on the provided additional links, and more. From the Environmental Protection Agency, the sixth site is called Oil Spill Program (6), and it also delves into the topic of oil spills. It provides information about the EPA's program for preventing, preparing for, and responding to oil spills that occur in and around inland waters of the United States. The next site, offered by How Stuff Works.com, is called How Oil Refining Works (7). Descriptions of crude oil, fractional distillation, chemical processing, and more is presented in a succinct but informative way. The last site is from The Center for Subsurface Modeling (CSM) of the Texas Institute for Computational and Applied Mathematics and is called CSMâÂÂs Picture Gallery (8). After clicking the Gallery link, visitors will find animations and images that represent CSMâÂÂs work such as oil spill simulations, discontinuous galerkin, the tyranny of scale, contaminant remediation, etc.

Brieske, Joel A.

2002-01-01

50

New drilling rigs  

SciTech Connect

Friede and Goldman Ltd. of New Orleans, Louisiana has a successful drilling rig, the L-780 jack-up series. The triangular-shaped drilling vessel measures 180 x 176 ft. and is equipped with three 352 ft legs including spud cans. It is designed to work in up to 250 ft waters and drill to 20,000 ft depths. The unit is scheduled to begin initial drilling operations in the Gulf of Mexico for Arco. Design features are included for the unit. Davie Shipbuilding Ltd. has entered the Mexican offshore market with the signing of a $40,000,000 Canadian contract for a jack-up to work in 300 ft water depths. Baker Marine Corporation has contracted with the People's Republic of China for construction of two self-elevating jack-ups. The units will be built for Magnum Marine, headquartered in Houston. Details for the two rigs are given. Santa Fe International Corporation has ordered a new jack-up rig to work initially in the Gulf of Suez. The newly ordered unit, Rig 136, will be the company's fourth offshore drilling rig now being built in the Far East. Temple Drilling Company has signed a construction contract with Bethlehem Steel for a jack-up to work in 200 ft water depths. Penrod Drilling Company has ordered two additional cantilever type jack-ups for Hitachi Shipbuilding and Engineering Co. Ltd. of Japan. Two semi-submersibles, capable of working in up to 2000 ft water depths, have been ordered by two Liberian companies. Details for these rigs are included. (DP)

Tubb, M.

1981-02-01

51

Design of a bicycle rig  

E-print Network

A design of a bicycle (bike) rig was conducted. This bike rig is designed to be used for aerodynamics measurement testing of bicycles, cyclists and cycling related items in a wind tunnel. This paper discusses the design ...

Racz, Rastislav

2010-01-01

52

Rock Springs Site 12 hydraulic/explosive true in situ oil shale fracturing experiment  

SciTech Connect

The experiment plan involved the creation and characterization of three horizontal hydraulic fractures, followed by the insertion and simultaneous detonation of slurry explosive in the two lower fractures. Core analyses, wellbore logging, and airflow and /sup 85/Kr tracer tests were used for site characterization and assessment of the hydraulic and explosive fracturing. Tiltmeters, wellhead pressure and flow gages, and in-formation pressure, flow and crack-opening sensors were used to monitor hydrofracture creation and explosive insertion. Explosive detonation diagnostic data were taken with stress and time-of-arrival gages and surface and in-formation accelerometers. The post-fracturing assessments indicated that: (1) hydrofracture creation and explosive insertion and detonation were accomplished essentially as planned; (2) induced fractures were randomly distributed through the shale with no extensively fractured regions or dislocation of shale; and (3) enhancement of permeability was limited to enlargement of the explosive-filled fractures.

Parrish, R.L.; Boade, R.R.; Stevens, A.L.; Long, A. Jr.; Turner, T.F.

1980-06-01

53

Product Module Rig Test  

NASA Technical Reports Server (NTRS)

The low emissions potential of a Rich-Quench-Lean (RQL) combustor for use in the High Speed Civil Transport (HSCT) application was evaluated as part of Work Breakdown Structure (WBS) 1.0.2.7 of the NASA Critical Propulsion Components (CPC) Program under Contract NAS3-27235. Combustion testing was conducted in cell 1E of the Jet Burner Test Stand at United Technologies Research Center. Specifically, a Rich-Quench-Lean combustor, utilizing reduced scale quench technology implemented in a quench vane concept in a product-like configuration (Product Module Rig), demonstrated the capability of achieving an emissions index of nitrogen oxides (NOx EI) of 8.5 gm/Kg fuel at the supersonic flight condition (relative to the program goal of 5 gm/Kg fuel). Developmental parametric testing of various quench vane configurations in the more fundamental flametube, Single Module Rig Configuration, demonstrated NOx EI as low as 5.2. All configurations in both the Product Module Rig configuration and the Single Module Rig configuration demonstrated exceptional efficiencies, greater than 99.95 percent, relative to the program goal of 99.9 percent efficiency at supersonic cruise conditions. Sensitivity of emissions to quench orifice design parameters were determined during the parametric quench vane test series in support of the design of the Product Module Rig configuration. For the rectangular quench orifices investigated, an aspect ratio (length/width) of approximately 2 was found to be near optimum. An optimum for orifice spacing was found to exist at approximately 0.167 inches, resulting in 24 orifices per side of a quench vane, for the 0.435 inch quench zone channel height investigated in the Single Module Rig. Smaller quench zone channel heights appeared to be beneficial in reducing emissions. Measurements were also obtained in the Single Module Rig configuration on the sensitivity of emissions to the critical combustor parameters of fuel/air ratio, pressure drop, and residence time. Minimal sensitivity was observed for all of these parameters.

Holdeman, James D. (Technical Monitor); Chiappetta, Louis, Jr.; Hautman, Donald J.; Ols, John T.; Padget, Frederick C., IV; Peschke, William O. T.; Shirley, John A.; Siskind, Kenneth S.

2004-01-01

54

Hoisting and Rigging Chapter Outline  

E-print Network

Chapter 41 Hoisting and Rigging Chapter Outline 1 Overview 2 1.1 Hazards / Impacts 2 2 Scope 3 2&R Inspector 15 4.3.5 Crane and Hoist Inspector 15 4.4 Roles and Responsibilities 15 4.4.1 Hoisting and Rigging Program Manager 15 4.4.2 Hoisting and Rigging Citizen Committee 15 4.4.3 The Crane Maintenance Group 16 4

Wechsler, Risa H.

55

Seismo-acoustic analysis of the Buncefield oil depot explosion in the UK, 2005 December 11  

NASA Astrophysics Data System (ADS)

A massive vapour cloud explosion occurred at the Buncefield fuel depot near Hemel Hempstead, UK, in the morning of 2005 December 11. The explosion was the result of an overflow from one of the storage tanks with the release of over 300 tons of petrol and generating a vapour cloud that spread over an area of 80000 m2, before being ignited. Considerable damage was caused in the vicinity of the explosion and a total of 43 people were injured. The explosion was detected by seismograph stations in the UK and the Netherlands and by infrasound arrays in the Netherlands. We analysed the seismic recordings to determine the origin time of 06:01:31.45 +/-0.5 s (UTC) from P-wave arrival times. Uncertainties in determination of origin time from acoustic arrival times alone were less than 10 s. Amplitudes of P-, Lg and primary acoustic waves were measured to derive decay relationships as function of distance. From the seismic amplitudes we estimated a yield of 2-10 tons equivalent to a buried explosion. Most seismic stations recorded primary and secondary acoustic waves. We used atmospheric ray tracing to identify the various travel paths, which depend on temperature and wind speed as function of altitude, leading to directional variation. Refracted waves were observed from the troposphere, stratosphere and thermosphere with a good match between observed and calculated traveltimes. The various wave types were also identified through array processing, which provides backazimuth and slowness, of recordings from an infrasound array in the Netherlands. The amplitude of stratospheric refracted acoustic waves recorded by the array microbarometers was used to estimate a yield of 21.6 (+/-5) tons TNT equivalent. We have demonstrated through joint seismo-acoustic analysis of the explosion that both the seismic velocity model and the atmospheric model are sufficient to explain the observed traveltimes.

Ottemöller, L.; Evers, L. G.

2008-03-01

56

Bacteria Provide Cleanup of Oil Spills, Wastewater  

NASA Technical Reports Server (NTRS)

Through Small Business Innovation Research (SBIR) contracts with Marshall Space Flight Center, Micro-Bac International Inc., of Round Rock, Texas, developed a phototrophic cell for water purification in space. Inside the cell: millions of photosynthetic bacteria. Micro-Bac proceeded to commercialize the bacterial formulation it developed for the SBIR project. The formulation is now used for the remediation of wastewater systems and waste from livestock farms and food manufacturers. Strains of the SBIR-derived bacteria also feature in microbial solutions that treat environmentally damaging oil spills, such as that resulting from the catastrophic 2010 Deepwater Horizon oil rig explosion in the Gulf of Mexico.

2010-01-01

57

Rig design overcomes desert conditions  

SciTech Connect

The author describes how rig components on various sizes of rigs are unitized for ease of transport from point-to-point in desert terrain. Also discussed are maintenance and special equipment required to protect machinery from the harsh desert environment of sandstorms and high temperature.

Fowler, N.W.

1981-10-01

58

Pressure rig for repetitive casting  

NASA Technical Reports Server (NTRS)

The invention is a pressure rig for repetitive casting of metal. The pressure rig performs like a piston for feeding molten metal into a mold. Pressure is applied to an expandable rubber diaphragm which expands like a balloon to force the metal into the mold. A ceramic cavity which holds molten metal is lined with blanket-type insulating material, necessitating only a relining for subsequent use and eliminating the lengthy cavity preparation inherent in previous rigs. In addition, the expandable rubber diaphragm is protected by the insulating material thereby decreasing its vulnerability to heat damage. As a result of the improved design the life expectancy of the pressure rig contemplated by the present invention is more than doubled. Moreover, the improved heat protection has allowed the casting of brass and other alloys with higher melting temperatures than possible in the conventional pressure rigs.

Vasquez, Peter (inventor); Hutto, William R. (inventor); Philips, Albert R. (inventor)

1989-01-01

59

Rig Diagnostic Tools  

NASA Technical Reports Server (NTRS)

Rig Diagnostic Tools is a suite of applications designed to allow an operator to monitor the status and health of complex networked systems using a unique interface between Java applications and UNIX scripts. The suite consists of Java applications, C scripts, Vx- Works applications, UNIX utilities, C programs, and configuration files. The UNIX scripts retrieve data from the system and write them to a certain set of files. The Java side monitors these files and presents the data in user-friendly formats for operators to use in making troubleshooting decisions. This design allows for rapid prototyping and expansion of higher-level displays without affecting the basic data-gathering applications. The suite is designed to be extensible, with the ability to add new system components in building block fashion without affecting existing system applications. This allows for monitoring of complex systems for which unplanned shutdown time comes at a prohibitive cost.

Soileau, Kerry M.; Baicy, John W.

2008-01-01

60

Plastic surgery and burns disasters. What impact do major civilian disasters have upon medicine? Bradford City Football Club stadium fire, 1985, King's Cross Underground fire, 1987, Piper Alpha offshore oil rig disaster, 1988.  

PubMed

Major disasters involving multiple casualties are neither new nor infrequent. Such events have important implications for medicine and can provide crucial lessons for the future. However, while the medical aspects of war have received considerable attention, rather less is known about civilian disasters. To redress this imbalance, this article reviews three major British disasters of the 1980s where serious burns injury was a significant feature of the human casualty: the Bradford City Football Club fire of 1985, the King's Cross Underground fire of 1987 and the Piper Alpha oil rig disaster of 1988. Four related themes are used to examine in detail the ways in which these events impacted on medicine: plastics and reconstructive surgery, clinical psychology, disaster management and long-term structural change. Drawing on articles in specialist burns and psychiatric journals, together with the personal communications and recollections of surgeons and psychiatrists involved, it is revealed that while ground-breaking advances are a relative rarity in medicine, numerous small but significant lessons did emerge from these events, although often in subtle and highly specialised fields of medicine. PMID:19181578

Vaghela, Kalpesh R

2009-06-01

61

Hoisting and Rigging (Formerly Hoisting and Rigging Manual)  

SciTech Connect

This standard is intended as a reference document to be used by supervisors, line managers, safety personnel, equipment operators, and any other personnel responsible for safety of hoisting and rigging operations at DOE sites. It quotes or paraphrases the US OSHA and ANSI requirements. It also encompasses, under one cover,hoisting and rigging requirements, codes, standards, and regulations, eliminating the need to maintain extensive (and often incomplete) libraries of hoisting and rigging standards throughout DOE. The standard occasionally goes beyond the minimum general industry standards established by OSHA and ANSI, and also delineates the more stringent requirements necessary to accomplish the complex, diversified, critical, and often hazardous hoisting and rigging work found with the DOE complex.

NONE

1995-06-01

62

Airway symptoms and lung function in the local population after the oil tank explosion in Gulen, Norway  

PubMed Central

Background Oil tanks containing a mixture of hydrocarbons, including sulphuric compounds, exploded and caught fire in an industrial harbour. This study assesses airway symptoms and lung function in the nearby population 1˝ years after the explosion. Methods A cross-sectional study included individuals ?18 years old. Individuals living <6 km (sub-groups <3km and 3–6 km) from the accident site formed the exposed group, individuals living >20 km away formed a control group. A questionnaire and spirometry tests were completed by 223 exposed individuals (response rate men 70%, women 75%) and 179 control individuals (response rate men 51%, women 65%). Regression analyses included adjustment for smoking, occupational exposure, atopy, infection in the preceding month and age. Analyses of symptoms were also adjusted for stress reactions related to the accident. Results Exposed individuals experienced significantly more blocked nose (odds ratio 1.7 [95% confidence interval 1.0, 2.8]), rhinorrhoea (1.6 [1.1, 3.3]), nose irritation (3.4 [2.0, 5.9]), sore throat (3.1 [1.8, 5.5]), morning cough (3.5 [2.0, 5.5]), daily cough (2.2 [1.4, 3.7]), cough >3 months a year (2.9 [1.5, 5.3]) and cough with phlegm (1.9 [1.2, 3.1]) than control individuals. A significantly increasing trend was found for nose symptoms and cough, depending on the proximity of home address to explosion site (daily cough, 3-6km 1.8 [1.0, 3.1], <3km 3.0 [1.7, 6.4]). Lung function measurements were significantly lower in the exposed group than in the control group, FEV1 adjusted mean difference ?123 mL [95% confidence interval ?232, -14]), FEV1% predicted ?2.5 [?5.5, 0.5], FVC ?173 mL [? 297, -50], FVC% predicted ?3.1 [? 5.9, -0.4], and airway obstruction (GOLD II/III). Conclusions Based on cross sectional analyses, individuals living in an area with air pollution from an oil tank explosion had more airway symptoms and lower lung function than a control group 1˝ years after the incident. PMID:23234609

2012-01-01

63

Evaluation of the fire and explosion hazards of oil-shale mining and processing. Volume 1. Analytical studies and accident scenarios. Open file report, 16 June 1977-15 July 1983  

SciTech Connect

The objectives of this research were to identify and evaluate potential fire and explosion hazards in oil-shale mining and processing by laboratory testing to provide recommendations for mitigation safety monitoring and to establish a basis for regulation. A series of scenarios were developed describing hypothetical fire and explosion incidents that might occur in oil-shale mining. The objectives were achieved through the following accomplishments: (1) It was found that fire and explosion properties of oil shale increase with oil shale richness and decreasing particle size. (2) Data from dust loading study in several mines showed that the total potential yield of combustibles was about one-tenth the amount required to fuel a propagating explosion. (3) Aging of oil shale dusts over a period of several years reduces the content of volatile combustibles and the corresponding fire and explosion properties. (4) Data and information from the completed program indicate that the hazard of dust explosions is less severe than the hazard of fire in mine muck piles. Laboratory data were used to relate fire and explosivity properties of oil shales to those of coals and other carbonaceous materials and to assist in the identification and evaluation of potential hazardous situations that may be encountered in oil shale mining and processing.

Crookston, R.B.; Atwood, M.T.; Williams, R.E.; McGuire, M.E.

1983-07-15

64

Rowan Arctic Rig 41--history and operation  

SciTech Connect

Rowan Arctic Rig 41 is a diesel-electric, air mobile, Arctic development and exploration land rig. The rig was built in 1980 to meet the specifications of ARCO, ALASKA, INC. and is representative of current generation Prudhoe Bay development rigs.

Gardner, L.R.

1983-02-01

65

Ring completion of rig categories.  

E-print Network

We offer a solution to the long-standing problem of group completing within the context of rig categories (also known as bimonoidal categories). Given a rig category R we construct a natural additive group completion R' that retains the multiplicative structure, hence has become a ring category. If we start with a commutative rig category R (also known as a symmetric bimonoidal category), the additive group completion R' will be a commutative ring category. In an accompanying paper we show how this can be used to prove the conjecture from [BDR] that the algebraic K-theory of the connective topological K-theory spectrum ku is equivalent to the algebraic K-theory of the rig category V of complex vector spaces.

Nils A. Baas; Bjorn Ian Dundas; Birgit Richter; John Rognes

66

Advanced Subsonic Combustion Rig  

NASA Technical Reports Server (NTRS)

Researchers from the NASA Lewis Research Center have obtained the first combustion/emissions data under extreme future engine operating conditions. In Lewis' new world-class 60-atm combustor research facility--the Advanced Subsonic Combustion Rig (ASCR)--a flametube was used to conduct combustion experiments in environments as extreme as 900 psia and 3400 F. The greatest challenge for combustion researchers is the uncertainty of the effects of pressure on the formation of nitrogen oxides (NOx). Consequently, U.S. engine manufacturers are using these data to guide their future combustor designs. The flametube's metal housing has an inside diameter of 12 in. and a length of 10.5 in. The flametube can be used with a variety of different flow paths. Each flow path is lined with a high-temperature, castable refractory material (alumina) to minimize heat loss. Upstream of the flametube is the injector section, which has an inside diameter of 13 in. and a length of 0.5-in. It was designed to provide for quick changeovers. This flametube is being used to provide all U.S. engine manufacturers early assessments of advanced combustion concepts at full power conditions prior to engine production. To date, seven concepts from engine manufacturers have been evaluated and improved. This collaborated development can potentially give U.S. engine manufacturers the competitive advantage of being first in the market with advanced low-emission technologies.

Lee, Chi-Ming

1998-01-01

67

Combination offshore drilling rig  

SciTech Connect

An offshore drilling rig is described for use in drilling into a formation below a body of water comprising a barge hull having a drilling slot extending inwardly from the peripheral boundary of the barge hull, means for supporting the barge hull in a position above the water, a cantilever structure mounted on the barge hull and movable horizontally with respect to such barge hull, the cantilever structure being so located relative to the drilling slot as to be movable horizontally into a position in vertical alignment with the drilling slot, a derrick and drilling machinery mounted to the cantilever structure and movable into a position above the drilling slot whereby well drilling operations may be conducted through the drilling slot, the cantilever structure also being movable horizontally to a position which locates the derrick and the drilling machinery outboard of the peripheral boundary of the barge hull, whereby a drilling operations may be conducted outside of the peripheral boundary of the barge hull, means mounted on the barge hull for moving the cantilever structure horizontally to different positions relative to the barge hull.

Lorenz, D.B.; Laid, J.S. II

1986-07-29

68

Fuzzy fault tree assessment based on improved AHP for fire and explosion accidents for steel oil storage tanks.  

PubMed

Fire and explosion accidents of steel oil storage tanks (FEASOST) occur occasionally during the petroleum and chemical industry production and storage processes and often have devastating impact on lives, the environment and property. To contribute towards the development of a quantitative approach for assessing the occurrence probability of FEASOST, a fault tree of FEASOST is constructed that identifies various potential causes. Traditional fault tree analysis (FTA) can achieve quantitative evaluation if the failure data of all of the basic events (BEs) are available, which is almost impossible due to the lack of detailed data, as well as other uncertainties. This paper makes an attempt to perform FTA of FEASOST by a hybrid application between an expert elicitation based improved analysis hierarchy process (AHP) and fuzzy set theory, and the occurrence possibility of FEASOST is estimated for an oil depot in China. A comparison between statistical data and calculated data using fuzzy fault tree analysis (FFTA) based on traditional and improved AHP is also made. Sensitivity and importance analysis has been performed to identify the most crucial BEs leading to FEASOST that will provide insights into how managers should focus effective mitigation. PMID:25010458

Shi, Lei; Shuai, Jian; Xu, Kui

2014-08-15

69

RADIATED UNDERWATER NOISE MEASURED FROM THE DRILLING RIG OCEAN GENERAL, RIG TENDERS  

E-print Network

RADIATED UNDERWATER NOISE MEASURED FROM THE DRILLING RIG OCEAN GENERAL, RIG TENDERS PACIFIC ARIKI;Figure 1 Photograph of the exploratory drilling rig Ocean General with the rig tender Pacific Frontier measurements were made of the radiated underwater noise from the exploration drilling rig Ocean General

70

New service rig operates with two-man crew  

SciTech Connect

Two Bakersfield, California, entrepreneurs have developed a partially automated and remote-controlled workover rig that can complete tubing and rod jobs on relatively shallow, singles-rig type wells with a total crew of two people on the ground. The system, called Autorig, was developed by Louis Witte, president of Witte Enterprise, and James Hansen, Paragon Engineering, Bakersfield. Initial field tests in E and B Natural Resources Management Corp.`s Blackwells Corner oil field culminated two years of development work. The new system is described in this paper using photographs from a testwell demonstration.

NONE

1995-07-01

71

Troy rig designed for man-made islands  

SciTech Connect

Troy of Canada Ltd. has designed a rig to drill from man-made islands in the middle of Canada's MacKenzie River. Six man-made islands will be built in the Norman Wells oil field in the river in order to access a part of the field. The rig design is modular. The generator sets, silicon rectifier unit, mud system and pumps and boilers will be set stationary, located in a central utility complex close to the drilling pad. The facility will allow the mast substructure, drawworks, and pipe racks to move independently from hole to hole. Conversion can be made quickly for minimum cost. Other features of the rig are cold weather weatherization, heat efficiency, ventilation system, onsite power systems, and safety design criteria.

Keeley, M.

1982-09-01

72

Science Nation: Hidden Oil and Gas Plumes in the Gulf  

NSDL National Science Digital Library

Days after the oil rig explosion in the Gulf of Mexico, University of Georgia oceanographer Samantha Joye got the wheels in motion to submit a proposal for a "Grant for Rapid Response Research" from the National Science Foundation (NSF). Her goal was to investigate underwater oil and gas plumes, and determine how this disaster was impacting deepwater organisms. Within a week, NSF approved the grant. Joye and her team from the University of Georgia, along with researchers from several other universities, spent May 24 through June 6, 2010 aboard the University of Miami research vessel, Walton Smith, departing from Gulfport, Miss.

73

Basic Rigging Workbook Training and Qualifications Program Office  

E-print Network

Basic Rigging Workbook Training and Qualifications Program Office October 13, 2008 #12;- 2 - #12..................................................................................................... 7 Specify, Select, and Inspect Rigging Equipment ............................................................................................................. 28 Using Rope in Rigging Applications

Ohta, Shigemi

74

49 CFR 229.65 - Spring rigging.  

Code of Federal Regulations, 2012 CFR

...Transportation 4 2012-10-01 2012-10-01 false Spring rigging. 229.65 Section 229.65 Transportation Other...Safety Requirements Suspension System § 229.65 Spring rigging. (a) Protective construction or safety hangers...

2012-10-01

75

49 CFR 229.65 - Spring rigging.  

Code of Federal Regulations, 2010 CFR

...Transportation 4 2010-10-01 2010-10-01 false Spring rigging. 229.65 Section 229.65 Transportation Other...Safety Requirements Suspension System § 229.65 Spring rigging. (a) Protective construction or safety hangers...

2010-10-01

76

49 CFR 229.65 - Spring rigging.  

Code of Federal Regulations, 2013 CFR

...Transportation 4 2013-10-01 2013-10-01 false Spring rigging. 229.65 Section 229.65 Transportation Other...Safety Requirements Suspension System § 229.65 Spring rigging. (a) Protective construction or safety hangers...

2013-10-01

77

49 CFR 229.65 - Spring rigging.  

Code of Federal Regulations, 2011 CFR

...Transportation 4 2011-10-01 2011-10-01 false Spring rigging. 229.65 Section 229.65 Transportation Other...Safety Requirements Suspension System § 229.65 Spring rigging. (a) Protective construction or safety hangers...

2011-10-01

78

RigMesh: Automatic Rigging for Part-Based Shape Modeling and Deformation Peter Borosan1  

E-print Network

RigMesh: Automatic Rigging for Part-Based Shape Modeling and Deformation P´eter Boros´an1 Ming Jin1Merge Rollback Figure 1: An example RigMesh modeling sequence: the artist experiments with different ideas for a shape by modeling (blue arrows) and posing (green arrows) using our skeletal rig. In the traditional

Columbia University

79

Finding Rigged Configurations From Paths  

E-print Network

We review reformulation of the map from tensor product of crystals to the rigged configurations in terms of the energy function of affine crystals. Especially, we give intuitive picture of the inverse scattering formalism for the periodic box-ball systems formulated by Kuniba-Takagi-Takenouchi (arXiv:math/0602481v2).

Reiho Sakamoto

2008-04-16

80

Finding Rigged Configurations From Paths  

E-print Network

We review reformulation of the map from tensor product of crystals to the rigged configurations in terms of the energy function of affine crystals. Especially, we give intuitive picture of the inverse scattering formalism for the periodic box-ball systems formulated by Kuniba-Takagi-Takenouchi (arXiv:math/0602481v2).

Sakamoto, Reiho

2008-01-01

81

PNNL Hoisting and Rigging Manual  

SciTech Connect

This manual describes the safe and cost effective operation, inspection, maintenance, and repair requirements for cranes, hoists, fork trucks, slings, rigging hardware, and hoisting equipment. It is intended to be a user's guide to requirements, codes, laws, regulations, standards, and practices that apply to Pacific Northwest National Laboratory (PNNL) and its subcontractors.

Haynie, Todd O.; Fullmer, Michael W.

2008-12-29

82

Hoisting and rigging manual: Uncontrolled document  

SciTech Connect

This document is a draft copy of a Hoisting and Rigging Manual for the Department of Energy. The manual is divided into ten chapters. The chapter titles follow: terminology and definitions; operator training and qualification; overhead and gantry cranes; mobile cranes; forklift trucks; hoists; hooks; wire rope, slings, and rigging accessories; construction hoisting and rigging equipment requirements; references.

NONE

1991-05-01

83

49 CFR 230.111 - Spring rigging.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 2013-10-01 false Spring rigging. 230.111 Section 230.111 Transportation...Equalizing System § 230.111 Spring rigging. (a) Arrangement of springs and equalizers...permissible. (b) Spring or spring rigging condemning defects. Springs or...

2013-10-01

84

49 CFR 230.111 - Spring rigging.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Spring rigging. 230.111 Section 230.111 Transportation...Equalizing System § 230.111 Spring rigging. (a) Arrangement of springs and equalizers...permissible. (b) Spring or spring rigging condemning defects. Springs or...

2011-10-01

85

Vol. [VOL], No. [ISS]: 111 Irradiance Rigs  

E-print Network

Vol. [VOL], No. [ISS]: 1­11 Irradiance Rigs Hong Yuan UMass Amherst, Disney Interactive Studios should be evaluated analytically or in a custom rig. This can increase the efficiency of deferred render techniques can be used to efficiently compute the coefficients of a spatial rig model based on the actual

Montréal, Université de

86

49 CFR 230.111 - Spring rigging.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 2010-10-01 false Spring rigging. 230.111 Section 230.111 Transportation...Equalizing System § 230.111 Spring rigging. (a) Arrangement of springs and equalizers...permissible. (b) Spring or spring rigging condemning defects. Springs or...

2010-10-01

87

RIGGED HILBERT SPACES FOR CHAOTIC DYNAMICAL SYSTEMS  

E-print Network

RIGGED HILBERT SPACES FOR CHAOTIC DYNAMICAL SYSTEMS Z. Suchanecki1,2, I July 1995 Abstract. We consider the problem of rigging for the Koopman operators of the Renyi and the baker maps. We show that the rigged Hilbert space for the Renyi maps has some

Bandtlow, Oscar

88

49 CFR 230.111 - Spring rigging.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 2012-10-01 false Spring rigging. 230.111 Section 230.111 Transportation...Equalizing System § 230.111 Spring rigging. (a) Arrangement of springs and equalizers...permissible. (b) Spring or spring rigging condemning defects. Springs or...

2012-10-01

89

RIGGED HILBERT SPACES FOR CHAOTIC DYNAMICAL SYSTEMS  

E-print Network

RIGGED HILBERT SPACES FOR CHAOTIC DYNAMICAL SYSTEMS Z. Suchanecki 1;2 , I. Antoniou 1;3 , S. Tasaki, Cambridge CB3 0HE, United Kingdom 7 July 1995 Abstract. We consider the problem of rigging for the Koopman operators of the Renyi and the baker maps. We show that the rigged Hilbert space for the Renyi maps has some

Bandtlow, Oscar

90

Rigged Hilbert spaces for chaotic dynamical systems  

SciTech Connect

We consider the problem of rigging for the Koopman operators of the Renyi and the baker maps. We show that the rigged Hilbert space for the Renyi maps has some of the properties of a strict inductive limit and give a detailed description of the rigged Hilbert space for the baker maps. {copyright} {ital 1996 American Institute of Physics.}

Suchanecki, Z. [International Solvay Institutes for Physics and Chemistry, CP 231, Campus Plaine ULB, Bd. du Triomphe, 1050 Brussels (Belgium)] [International Solvay Institutes for Physics and Chemistry, CP 231, Campus Plaine ULB, Bd. du Triomphe, 1050 Brussels (Belgium); [Hugo Steinhaus Center and Institute of Mathematics, Wrocl/aw Technical University, ul. Wybrzeze Wyspianskiego 27, 50-370 Wroclaw (Poland); Antoniou, I. [International Solvay Institutes for Physics and Chemistry, CP 231, Campus Plaine ULB, Bd. du Triomphe, 1050 Brussels (Belgium)] [International Solvay Institutes for Physics and Chemistry, CP 231, Campus Plaine ULB, Bd. du Triomphe, 1050 Brussels (Belgium); [Theoretische Natuurkunde Free University of Brussels; Tasaki, S. [International Solvay Institutes for Physics and Chemistry, CP 231, Campus Plaine ULB, Bd. du Triomphe, 1050 Brussels, Belgium and] [International Solvay Institutes for Physics and Chemistry, CP 231, Campus Plaine ULB, Bd. du Triomphe, 1050 Brussels, Belgium and; [Institute for Fundamental Chemistry 34-4 Takano Nishihiraki-cho Kyoto 606 (Japan); Bandtlow, O.F. [International Solvay Institutes for Physics and Chemistry, CP 231, Campus Plaine ULB, Bd. du Triomphe, 1050 Brussels (Belgium)] [International Solvay Institutes for Physics and Chemistry, CP 231, Campus Plaine ULB, Bd. du Triomphe, 1050 Brussels (Belgium); [Cavendish Laboratory, University of Cambridge, Madingley Road, Cambridge CB30HE (United Kingdom)

1996-11-01

91

Solar stirling engine rig tests  

Microsoft Academic Search

A description of a prototype four-cylinder Stirli ng engine construction with the heat receiver of the concentrated solar\\u000a radiant flux and with a swashplate drive is given. The rig tests have been carried out in an effort to optimize the individual\\u000a engine units. They have been conducted in the cooling system mode and in the mode of an engine working

I. A. Tursunbaev; E. P. Orda; A. I. Lezhebokov; A. P. Korobkov; A. I. Semyannikov

2010-01-01

92

SSRL Hoisting & Rigging Lift Plan Stanford Synchrotron Radiation Laboratory  

E-print Network

SSRL Hoisting & Rigging Lift Plan Stanford Synchrotron Radiation Laboratory May 16, 2005 SSRL will be controlled or mitigated. Rigging Details Attach a rigging sketch or photographs to documentation the rigging the load require SSRL Rigging Panel approval. Lifts that involve loads that, if dropped, could release

Wechsler, Risa H.

93

RQL Integrated Module Rig Test  

NASA Technical Reports Server (NTRS)

This report documents the activities conducted under Work Breakdown Structure (WBS) 1.0.2.7 of the NASA Critical Components (CPC) Program to evaluate the low emissions potential of a Rich-Quench-Lean combustor capable of achieving the program goal of emissions of nitrogen oxides (NOxEI) less than 5 gm/Kg fuel at the supersonic light condition while maintaining combustion efficiencies in excess of 99.9 percent. The chosen combustor module would then be tested in the subscale annular rig test prior to testing in the subscale core engine demonstrator, if the RQL concept were to be chosen at the Combustor Downselect.

Koopman, Frederick S.; Ols, John T.; Padget, Frederick C., IV; Siskind, Kenneth S.; Holdeman, James D. (Technical Monitor)

2004-01-01

94

Riggings of locally compact abelian groups  

E-print Network

We obtain a set of generalized eigenvectors that provides a generalized spectral decomposition for a given unitary representation of a commutative, locally compact topological group. These generalized eigenvectors are functionals belonging to the dual space of a rigging on the space of square integrable functions on the character group. These riggings are obtained through suitable spectral measure spaces.

M. Gadella; F. Gomez; S. Wickramasekara

2007-04-12

95

Metric calibration of a stereo rig  

Microsoft Academic Search

Describes a method to determine affine and metric calibration for a stereo rig. The method does not involve the use of calibration objects or special motions, but simply a single general motion of the rig with fixed parameters (i.e. camera parameters and relative orientation of the camera pair). The novel aspects of this work are: first, relating the distinguished objects

Andrew Zisserman; Paul A Beardsley; Ian D Reid

1995-01-01

96

Antenna bias rigging for performance objective  

NASA Technical Reports Server (NTRS)

An optimum bias rigging for a paraboloidal antenna can be used to minimize the expected average mean-square half-pathlength surface deviations. Statistics of deep space planetary missions are employed to develop weighting factors for antenna elevation angles during these missions. A procedure is shown to compute the optimum rigging angle from these weights.

Levy, R.

1977-01-01

97

Hoisting and Rigging Review of Conformance Form  

E-print Network

Hoisting and Rigging Review of Conformance Form (See page 3 for instructions) Hoisting and Rigging standards. List applicable standards Specify structural weld inspection requirement2 Not required Visual of conformance requirements.) Fixed Crane and Hoist Approval Building Inspection Office Department head

Wechsler, Risa H.

98

Hoisting and Rigging: Inspection and Maintenance Requirements  

E-print Network

Equipment Database Hoisting and Rigging: Review of Conformance Form (SLAC-I-730-0A21J-021) pdf | doc Hoisting and Rigging: Visual Structural Weld Inspection Criteria and Form (SLAC-I-730-0A21J-020) pdf | doc

Wechsler, Risa H.

99

Workover rig selection saves operator's money  

Microsoft Academic Search

The first thing to consider in selecting a rig for workover or maintenance is required hoisting capacity, which depends on well depth and size of tubing or work string to be used. After determining hoisting capacity, equipment required to go back in the hole must be considered. Does the rig have adequate braking capability to go in the hole safely.

McLain

1977-01-01

100

Drill Rig Safety Topics of the Presentation  

E-print Network

­ Filter Condition ­ General Inspection of Wires, Hoses, Cables etc. · Rig Set-up · Safety Check ­ Fire stroke remaining after max adjustment · 3/32 loss of diameter (1 ½ cable) · Wire Break Determination Swivel ­ Rotation gear box seals ­ Chain/Cable Sheaves ­ Fan Bearing #12;Inspect Rig to Truck Frame

101

Gulf Oil Spill Commission Report Calls for Major Drilling Safety Reforms  

NASA Astrophysics Data System (ADS)

The BP Deepwater Horizon oil rig explosion and the resulting oil spill in the Gulf of Mexico last year were “foreseeable and preventable,” according to the report of a presidentially appointed commission, issued on 11 January, that recommended significant changes in U.S. government and industry practices to avoid future oil spill disasters. Among the recommendations of the National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling are that Congress and the Obama administration create an independent safety agency within the Department of the Interior (DOI) to oversee all aspects of offshore drilling safety and that the oil and gas industry establish a “safety institute” to develop and enforce safety standards.

Showstack, Randy

2011-01-01

102

Testing the Generalization Efficiency of Oil Slick Classification Algorithm Using Multiple SAR Data for Deepwater Horizon Oil Spill  

NASA Astrophysics Data System (ADS)

Marine oil spills due to releases of crude oil from tankers, offshore platforms, drilling rigs and wells, etc. are seriously affecting the fragile marine and coastal ecosystem and cause political and environmental concern. A catastrophic explosion and subsequent fire in the Deepwater Horizon oil platform caused the platform to burn and sink, and oil leaked continuously between April 20th and July 15th of 2010, releasing about 780,000 m3 of crude oil into the Gulf of Mexico. Today, space-borne SAR sensors are extensively used for the detection of oil spills in the marine environment, as they are independent from sun light, not affected by cloudiness, and more cost-effective than air patrolling due to covering large areas. In this study, generalization extent of an object based classification algorithm was tested for oil spill detection using multiple SAR imagery data. Among many geometrical, physical and textural features, some more distinctive ones were selected to distinguish oil and look alike objects from each others. The tested classifier was constructed from a Multilayer Perception Artificial Neural Network trained by ABC, LM and BP optimization algorithms. The training data to train the classifier were constituted from SAR data consisting of oil spill originated from Lebanon in 2007. The classifier was then applied to the Deepwater Horizon oil spill data in the Gulf of Mexico on RADARSAT-2 and ALOS PALSAR images to demonstrate the generalization efficiency of oil slick classification algorithm.

Ozkan, C.; Osmanoglu, B.; Sunar, F.; Staples, G.; Kalkan, K.; Bal?k Sanl?, F.

2012-07-01

103

Stable bundles over rig categories  

E-print Network

The point of this paper is to prove the conjecture that virtual 2-vector bundles are classified by K(ku), the algebraic K-theory of topological K-theory. Hence, by the work of Ausoni and the fourth author, virtual 2-vector bundles give us a geometric cohomology theory of the same telescopic complexity as elliptic cohomology. The main technical step is showing that for well-behaved small rig categories R (also known as bimonoidal categories) the algebraic K-theory space, K(HR), of the ring spectrum HR associated to R is equivalent to Z \\times |BGL(R)|^+, where GL(R) is the monoidal category of weakly invertible matrices over R. If \\pi_0R is a ring this is almost formal, and our approach is to replace R by a ring completed version provided by [BDRR1] whose \\pi_0 is the ring completion of \\pi_0R.

Baas, Nils A; Richter, Birgit; Rognes, John

2009-01-01

104

Stable bundles over rig categories.  

E-print Network

The point of this paper is to prove the conjecture that virtual 2-vector bundles are classified by K(ku), the algebraic K-theory of topological K-theory. Hence, by the work of Ausoni and the fourth author, virtual 2-vector bundles give us a geometric cohomology theory of the same telescopic complexity as elliptic cohomology. The main technical step is showing that for well-behaved small rig categories R (also known as bimonoidal categories) the algebraic K-theory space, K(HR), of the ring spectrum HR associated to R is equivalent to Z \\times |BGL(R)|^+, where GL(R) is the monoidal category of weakly invertible matrices over R. If \\pi_0R is a ring this is almost formal, and our approach is to replace R by a ring completed version provided by [BDRR1] whose \\pi_0 is the ring completion of \\pi_0R.

Nils A. Baas; Bjorn Ian Dundas; Birgit Richter; John Rognes

105

Environmental disaster or just a drop in the bucket: Texas scientists on the real effects of the Deewater Horizon oil spill  

E-print Network

Winter 2011 tx H2O 3 or just a drop in thebucket?Texas scientists on the real e#31;ects of the Deepwater Horizon oil spill 4 tx H2O Winter 2011 Environmental Disaster Continued What if gasoline pumped into cars, seafood eaten at restaurants... but forgo#27;en as the wreckage of the Deepwater Horizon MC#31;#30;#31; drilling platform sank into its waters. A crude awakening Like any large oil spill, this one took its toll in many ways. Eleven BP employees on the rig died in the explosion...

Lee, Leslie

2011-01-01

106

Environmental disaster or just a drop in the bucket?: Texas scientists on the real effects of the Deepwater Horizon oil spill  

E-print Network

Winter 2011 tx H2O 3 or just a drop in thebucket?Texas scientists on the real e#31;ects of the Deepwater Horizon oil spill 4 tx H2O Winter 2011 Environmental Disaster Continued What if gasoline pumped into cars, seafood eaten at restaurants... but forgo#27;en as the wreckage of the Deepwater Horizon MC#31;#30;#31; drilling platform sank into its waters. A crude awakening Like any large oil spill, this one took its toll in many ways. Eleven BP employees on the rig died in the explosion...

Lee, Leslie

2011-01-01

107

Quasisymmetric sewing in rigged Teichmueller space  

E-print Network

One of the basic geometric objects in conformal field theory (CFT) is the the moduli space of Riemann surfaces whose $n$ boundaries are ''rigged'' with analytic parametrizations. The fundamental operation is the sewing of such surfaces using the parametrizations to identify points. An alternative model is the moduli space of $n$-punctured Riemann surfaces together with local biholomorphic coordinates at the punctures. We refer to both of these moduli spaces as the "rigged Riemann moduli space". By generalizing to quasisymmetric boundary parametrizations, and defining rigged Teichmueller spaces in both the border and puncture pictures, we prove the following results: (1) The Teichmueller space of a genus-$g$ surface bordered by $n$ closed curves covers the rigged Riemann and rigged Teichmueller moduli spaces of surfaces of the same type, and induces complex manifold structures on them. (2) With this complex structure the sewing operation is holomorphic. (3) The border and puncture pictures of the rigged moduli and rigged Teichmueller spaces are biholomorphically equivalent. These results are necessary in rigorously defining CFT (in the sense of G. Segal), as well as for the construction of CFT from vertex operator algebras.

David Radnell; Eric Schippers

2005-07-13

108

Conquering Alaska's Arctic drilling problems. Part 3 (conclusion). Completion techniques and drilling rigs  

Microsoft Academic Search

Improved well-completion procedures, along with the development of rigs specially designed for Arctic service, have contributed substantially to the optimization of Alaska's oil and gas fields. Many of the techniques pioneered at Prudhoe Bay will prove useful in developing future Arctic discoveries.

1981-01-01

109

Conquering Alaska's Arctic drilling problems. Part 3 (conclusion). Completion techniques and drilling rigs  

SciTech Connect

Improved well-completion procedures, along with the development of rigs specially designed for Arctic service, have contributed substantially to the optimization of Alaska's oil and gas fields. Many of the techniques pioneered at Prudhoe Bay will prove useful in developing future Arctic discoveries.

Moore, S.D.

1981-07-01

110

Rigged Configurations and Cylindric Loop Schur Functions  

E-print Network

Rigged configurations are known to provide action-angle variables for remarkable discrete dynamical systems known as box-ball systems. We conjecture an explicit piecewise-linear formula to obtain the shapes of a rigged configuration from a tensor product of one-row crystals. We introduce cylindric loop Schur functions and show that they are invariants of the geometric R-matrix. Our piecewise-linear formula is obtained as the tropicalization of ratios of cylindric loop Schur functions. We prove our conjecture for the first shape of a rigged configuration, thus giving a piecewise-linear formula for the lengths of the solitons of a box-ball system.

Thomas Lam; Pavlo Pylyavskyy; Reiho Sakamoto

2014-10-16

111

Department of Energy Hoisting and Rigging Manual  

SciTech Connect

The manual is intended as a reference document to be used by supervisors, line managers, safety personnel, equipment operators, and any other personnel responsible for safety of hoisting and rigging operations at DOE sites. The manual quotes verbatim or paraphrases the requirements of the Occupational Safety and Health Administration (OSHA) and the American National Standards Institute (ANSI). It was developed to emcompass, under one cover, hoisting and rigging requirements, codes, standards, and regulations. In doing so, it eliminates the need to maintain extensive (and often incomplete) libraries of hoisting and rigging standards throughout the DOE.

Not Available

1993-04-01

112

Experimental investigation of the physical properties of medium and heavy oils, their vaporization and use in explosion engines. Part III  

NASA Technical Reports Server (NTRS)

The test equipment for studying the vaporization of heavy and medium oils is described as well as some of the experimental properties explored such as vaporization speed and diffusion coefficient. The experiemtal arrangement is also discussed.

Heinlein, Fritz

1926-01-01

113

AIRDROP OF SUPPLIES AND EQUIPMENT: RIGGING HEAVY ANTITANK  

E-print Network

AIRDROP OF SUPPLIES AND EQUIPMENT: RIGGING HEAVY ANTITANK ASSAULT WEAPON SYSTEM (TOW) DISTRIBUTION: RIGGING HEAVY ANTITANK ASSAULT WEAPON SYSTEM (TOW) CONTENTS Page PREFACE iv CHAPTER 1 INTRODUCTION ..........................................................................................1-1 CHAPTER 2 RIGGING TOW WEAPON SYSTEMS AND MISSILES IN A-22 CARGO BAGS Section - I Rigging TOW

US Army Corps of Engineers

114

Frankenrigs: building character rigs from multiple sources.  

PubMed

We present a new rigging and skinning method which uses a database of partial rigs extracted from a set of source characters. Given a target mesh and a set of joint locations, our system can automatically scan through the database to find the best-fitting body parts, tailor them to match the target mesh, and transfer their skinning information onto the new character. For the cases where our automatic procedure fails, we provide an intuitive set of tools to fix the problems. When used fully automatically, the system can generate results of much higher quality than a standard smooth bind, and with some user interaction, it can create rigs approaching the quality of artist-created manual rigs in a small fraction of the time. PMID:21301025

Miller, Christian; Arikan, Okan; Fussell, Don

2011-08-01

115

Folk Song 2, A rig ma  

E-print Network

?????????????????????????????? ???????????? Tape No. / Track / Item No. Dpa' sde Folk Song 2.WAV Length of track 00:00:48 Related tracks (include description/relationship if appropriate) Title of track A rig ma (untranslatable) ??? ???????? Translation of title Description (to...

Klu mo tshe ring

116

The Radar Image Generation (RIG) model  

NASA Technical Reports Server (NTRS)

RIG is a modeling system which creates synthetic aperture radar (SAR) and inverse SAR images from 3-D faceted data bases. RIG is based on a physical optics model and includes the effects of multiple reflections. Both conducting and dielectric surfaces can be modeled; each surface is labeled with a material code which is an index into a data base of electromagnetic properties. The inputs to the program include the radar processing parameters, the target orientation, the sensor velocity, and (for inverse SAR) the target angle rates. The current version of RIG can be run on any workstation, however, it is not a real-time model. We are considering several approaches to enable the program to generate realtime radar imagery. In addition to its image generation function, RIG can also generate radar cross-section (RCS) plots as well as range and doppler radar return profiles.

Stenger, Anthony J.

1993-01-01

117

Group Based Rigging of Realistically Feathered Wings  

E-print Network

.............................................................................................. 62 V.1 Realism ............................................................................... 62 V.2 Effectiveness for Riggers ................................................... 63 V.2.1 Bug Fixes... ................................................................... 63 V.2.2 Rig Efficiency and Form ........................................... 64 V.3 Effectiveness for Animators ............................................... 65 V.3.1 Form and Motion...

Howard, Heather Vernette

2012-02-14

118

Insensitive explosive  

SciTech Connect

This invention relates to the field of chemistry and, more particularly, to explosives. This invention is the result of a contract with the Department of Energy (Contract No. W-7405-ENG-36). It is desirable to use explosives in weapons and other applications which are less sensitive than the common explosives RDX, TNT, and HMX, since there have been catastrophic explosions of munitions which use these compounds. In preliminary characterization and sensitivity testing, it has been found that 3-amino-5-nitro-1,2,4-triazole (ANTA) is a promising insensitive high explosive. This report details the safety, production, and physical properties of ANTA.

Lee, Kien-yin; Storm, C.B.

1991-12-31

119

Cranes, hoists, and rigging. A safety training manual  

SciTech Connect

The handling equipment discussed in this manual is the type that lifts, lowers, and locates (positions) heavy material - cranes and hoists. The crane/hoist family of equipment may be as small as a single pulley/rope system handling several pounds, or as large as a marine crane system that recently (1985) hoisted a 5005-metric ton oil drilling rig from a barge and placed it on the seabed of England's North Atlantic offshore oil field. An equivalent ''pick'' would be a 6-ft-high solid pine board, 360 ft long and 160 ft wide (the dimensions of a football field). The capacity of the cranes and hoists at Sandia National Laboratories in Albuquerque (SNLA) fits somewhere within the first 2% of the marine pick or lift described above. SNLA has several mobile cranes and more than 500 other types of cranes and hoists located in more than 100 buildings. The Department of Energy (DOE) and SNL have safety policies and directives that require the operators of heavy equipment to be trained and authorized. The Cranes, Hoists, and Rigging Safety Training Program, sponsored by the SNLA Safety Department, is an effort to fulfill those safety policy requirements. This manual will be used as a safety training aid and will be issued as a reference document for supervisors, operators, inspectors, and service personnel who use cranes or hoists during their regular duties.

Stinnett, L.

1986-07-01

120

Offshore drilling and oil recovery: keys to half a century  

Microsoft Academic Search

Technological and structural developments in offshore drilling and oil recovery during the past 50 yr are reviewed. The earliest steps into the open sea were pier and pile-supported rigs built off the California and Louisiana coasts in the 1920s and 1930s, respectively. Jackup rigs were designed to lift the rig above storm wave level, and currently 53% of the world's

Kastrop

1979-01-01

121

Oil Spill Model  

NSDL National Science Digital Library

This interactive flash model from the Living Ocean Society allows users to the explore hypothetical oil spills in the Hecate Straight off the northwest coast of Canada. The several scenarios include oil rig spills, spills from oil tankers, as well as accidents involving other vessels. Users can see how the seasonal winds and tides affect which areas are affected by a particular spill.

Society, Living O.

122

Experimental investigation of the physical properties of medium and heavy oils, their vaporization and use in explosion engines. Part IV  

NASA Technical Reports Server (NTRS)

This report presents a theoretical treatment of the vaporization process of medium and heavy oils. The results of this investigation, which were mostly obtained from the lighter components of the heavy fuels, require a 10- or 16-fold vaporization in comparison with gasoline. We must attain a still finer degree of atomization, in order to include the heavier components.

Heinlein, Fritz

1926-01-01

123

Operations Recognition at Drill-Rigs  

NASA Astrophysics Data System (ADS)

Drilling an oil & gas well is always guided by the demand to prevent crises affecting technique, investment and security. To overcome uncertainties caused by lack of knowledge about geological formations during drilling, real-time sensor measurements are used to support the prediction and thus the prevention of such crises. The proposed method supports the extraction of knowledge from sensor data to improve productivity and performance, prevent from mistakes and resolve problems faster. Many mechanical parameters, such as hookload and block position are continuously measured during drilling oil wells. Considering the amount and complexity of the drilling data, it is a real big challenge for a human expert to discover and understand the patterns within the data. In this work machine learning techniques are applied to discover and understand the patterns occurring in such drilling data. We propose a hierarchical approach for drilling operations recognition to break the total drilling time down into a set of pre-defined operation states. This process supports the drilling engineers not only to measure the performance of the drilling process but also to identify patterns in the data that presumably indicate emerging crises. The proposed approach consists of two phases. In the first phase, five principal states describing very basic operational states at the rig will be recognized by use of the sensor data. In the second phase, those principal states will be combined to a set of drilling operational states. The principal operation states can be considered as an intermediate layer between sensor data and high level drilling operations. The five physical states used in the intermediate layer are related to drill string rotation & movement, mud circulation, the actual drilling itself and a state where the drill string is suspended from the hook. All those states are binary (yes/no) except drill string movement which has three values (up/down/static). For recognition of those principal states dedicated neural network classifier were trained using the sensor data as input. As network architecture the completely connected perceptron was applied in combination with parallel learning. Automatic network growing was used to match the model complexity to the complexity of the particular classification problem and thus to prevent from over fitting. In addition forward selection method was used to identify the sensor data necessary to recognise the particular states. The approach was evaluated using real-time/real-world data and the results show that the proposed approach has the ability to classify drilling operations highly accurate. The performances of the classifiers were evaluated by cross-validation, the average correct classification rate was above 99%, for both, the training and the testing data sets.

Esmael, B.; Fruhwirth, R.; Arnaout, A.; Thonhauser, G.

2012-04-01

124

Satellites View Growing Gulf Oil Spill (Update)  

NASA Video Gallery

On April 30, 2010, the Deepwater Horizon oil rig exploded in the Gulf of Mexico, triggering the largest oil spill in U.S. history. The MODIS instrument, on board NASA's Terra and Aqua satellites, c...

125

Optical Micro- and Nanofiber Pulling Rig  

E-print Network

We review the method of producing adiabatic optical micro- and nanofibers using a hydrogen/oxygen flame brushing technique. The flame is scanned along the fiber, which is being simultaneously stretched by two translation stages. The tapered fiber fabrication is reproducible and yields highly adiabatic tapers with either exponential or linear profiles. Details regarding the setup of the flame brushing rig and the various parameters used are presented. Information available from the literature is compiled and further details that are necessary to have a functioning pulling rig are included. This should enable the reader to fabricate various taper profiles, while achieving adiabatic transmission of ~ 99% for fundamental mode propagation. Using this rig, transmissions greater than 90% for higher order modes in an optical nanofiber have been obtained.

Ward, J M; Le, Vu H; Chormaic, S Nic

2014-01-01

126

NASA GRC Cryogenic Seal Test Rig Capability  

NASA Technical Reports Server (NTRS)

It has been about six years since any cryogenic seal tests were run at NASA GRC (Glenn Research Center). The Cryogenic Components Lab, where the cryogenic seal test rigs are located, has been shutdown due to the impending expansion of the Cleveland Hopkins International Airport. The current plan is to move the Cryogenic Components Lab (CCL), Cells I and 2 to NASA Plumbrook in Sandusky, Ohio. The purpose of this presentation is to inform the seal community of the cryogenic seal test rig capabilities available at NASA GRC for planning of future programs.

Proctor, Margaret

2001-01-01

127

Rig scarcity prompts innovative drilling solution  

SciTech Connect

Unable to locate a shallow-water offshore rig for its program in Indonesia, British Gas International developed an innovative pad/ballasted barge configuration to utilize a land rig, which was available. Many non-typical problems were encountered and solved to establish the drilling location 600 m (2,000 ft) from the shore in Bintuni Bay in Irian Jaya, eastern Indonesia. The final hybrid configuration has sparked interesting debate as to whether the operation should be designated as onshore or offshore. The paper discusses the project overview, concept development, construction, and operations.

Lattimore, G.M.; Gott, T.; Feagin, J.

1997-11-01

128

Georgia Tech Chemistry & Biochemistrywww.chemistry.gatech.edu/rig --Research  

E-print Network

Georgia Tech Chemistry & Biochemistrywww.chemistry.gatech.edu/rig -- Research New Faculty Workshop.aip.org ! #12;Georgia Tech Chemistry & Biochemistrywww.chemistry.gatech.edu/rig -- Research New Faculty Workshop

Feig, Andrew

129

An Orientation to Explosive Safety.  

ERIC Educational Resources Information Center

Provides an overview of various types of explosives. Classifies and describes explosives as initiating or primary explosives, low explosives, and high (secondary explosives). Discusses detonating devices, domestic explosive systems, the sensitivity of explosives, explosive reactions, and emergency responses. (TW)

Harris, Betty W.

1987-01-01

130

Detection of Bid Rigging in Procurement Auctions  

Microsoft Academic Search

This paper examines bidding in auctions for state highway construction contracts, in order to determine whether bid rigging occurred. Detection of collusion is possible because of limited participation in the collusive scheme. Collusion did not take the form of a bid rotation scheme. Instead, several ring members bid on most jobs. One was a serious bidder, and the other submitted

Robert H. Porter; J Douglas Zona

1993-01-01

131

AEROELASTICITY OF AN AIRFOIL TEST RIG  

Microsoft Academic Search

This paper describes an aeroelastic model for an airfoil test rig which is based on the mode superposition method for structural systems and linear airfoil theory for describing the unsteady airfoil loading. The model is applied to the case of an airfoil undergoing rapid, small amplitude step-like maneuvers. The motivation for these tests was an interest in measuring airfoil indicial

G. M. Graham; J. E. Jenkins

1997-01-01

132

Barge hull for offshore drilling rigs  

Microsoft Academic Search

An improved barge hull for offshore drilling rigs is disclosed. The invention comprises a channel in the bottom of a barge hull extending from the bottom of said barge hull to the back of said barge hull for directing the flow of water under said barge hull to the back of said barge hull in order to disrupt the relative

1984-01-01

133

The Rigged Hilbert Space of the Free Hamiltonian  

E-print Network

The Rigged Hilbert Space of the Free Hamiltonian Rafael de la Madrid Institute for Scientific@isiosf.isi.it (October 23, 2003) Abstract We explicitly construct the Rigged Hilbert Space (RHS) of the free Hamiltonian that the Rigged Hilbert Space (RHS) provides the methods needed to handle Dirac's bra­ket formalism and continuous

134

Singular Solutions to the Bethe Ansatz Equations and Rigged Configurations  

E-print Network

RIMS­1793 Singular Solutions to the Bethe Ansatz Equations and Rigged Configurations By Anatol N, Kyoto, Japan #12; Singular Solutions to the Bethe Ansatz Equations and Rigged Configurations a Anatol N and the rigged con gurations 1 #12; 1 Introduction The problem of constructing ``physical states

135

ADVANCED HOT SECTION MATERIALS AND COATINGS TEST RIG  

SciTech Connect

The Hyperbaric Advanced Hot Section Materials & Coating Test Rig program provides design and implementation of a laboratory rig capable of simulating the hot gas path conditions of coal-gas fired industrial gas turbine engines. The principal activity during this reporting period were the evaluation of syngas combustor concepts, the evaluation of test section concepts and the selection of the preferred rig configuration.

Scott Reome; Dan Davies

2004-04-30

136

Department of Mechanical Engineering Spring 2011 Cylinder Assembly Rotation Rig  

E-print Network

PENNSTATE Department of Mechanical Engineering Spring 2011 Cylinder Assembly Rotation Rig Overview. Objectives The objectives of this project are as follows: Provide a rig to improve the current assembly for approximately $700.00. Outcomes The final concept fulfilled the necessary objectives. The rig can be operated

Demirel, Melik C.

137

Trajectography of an Uncalibrated Stereo Rig in Urban Environments  

E-print Network

Trajectography of an Uncalibrated Stereo Rig in Urban Environments Nicolas Simond, Patrick Rives rig in urban environments from features lying on the road. The extraction of significant reliable to the stereo constraints and a priori knowledge on the scene. The motion between two frames of the stereo rig

Boyer, Edmond

138

Description of resonances within the rigged Hilbert space  

E-print Network

Description of resonances within the rigged Hilbert space Rafael de la Madrid Department of Physics the Hilbert space to a rigged Hilbert space, within which the physical bound, scattering and resonance spectra; Hilbert space; rigged Hilbert space; Gamow states PACS: 03.65.­w, 02.30.Hq INTRODUCTION: LECTURE 1

139

DOUBLE-RIG SHRIMP TRAWLING IN THE GULF OF MEXICO  

E-print Network

DOUBLE-RIG SHRIMP TRAWLING IN THE GULF OF MEXICO , , FISB AND WILDLIFE SERVICE Vaited Sial, Commissioner Bureau of Commercial Fisheries, Donald L. McKernan, Director DOUBLE-RIG SHRIMP TRAWLING 470 Washington· September 1958 #12;CONTENTS Introduction · . . . · . Double-Trawl Method Rigging

140

The Rigged Hilbert Space of the Free Hamiltonian  

E-print Network

The Rigged Hilbert Space of the Free Hamiltonian Rafael de la Madrid Institute for Scientific@isiosf.isi.it (October 23, 2002) Abstract We explicitly construct the Rigged Hilbert Space (RHS) of the free Hamiltonian that the Rigged Hilbert Space (RHS) provides the methods needed to handle Dirac's bra­ket formalism and continuous

141

Rotation Averaging with Application to Camera-Rig Calibration  

E-print Network

Rotation Averaging with Application to Camera-Rig Calibration Yuchao Dai1,2 , Jochen Trumpf2, NICTA Abstract. We present a method for calibrating the rotation between two cameras in a camera rig. Various experiments both on synthetic data and a real camera rig are conducted to evaluate the performance

Li, Hongdong

142

Relationships Between Two Approaches: Rigged Configurations and 10-Eliminations  

E-print Network

RIMS-1662 Relationships Between Two Approaches: Rigged Configurations and 10-Eliminations By Anatol UNIVERSITY, Kyoto, Japan #12;Relationships Between Two Approaches: Rigged Configurations and 10-Eliminations-ball systems. One way is the rigged configuration approach due to Kuniba­Takagi­Takenouchi and another way

143

Singular Solutions to the Bethe Ansatz Equations and Rigged Configurations  

E-print Network

RIMS-1793 Singular Solutions to the Bethe Ansatz Equations and Rigged Configurations By Anatol N, Kyoto, Japan #12;Singular Solutions to the Bethe Ansatz Equations and Rigged Configurations a Anatol N equations and the rigged configurations. 1 #12;1 Introduction The problem of constructing "physical states

144

Best Mast: a new way to design a rig  

Microsoft Academic Search

One of the most difficult tasks for a rig designer is to estimate the maximum loading condition for a rig. These loads determine the mast tube dimensions such as wall thickness and the stay diameters. The loads basically determine the total weight of a rig. The constant drive for better sailing performance pushes the design to the limits, even for

Robert Janssen Msc

145

Drill rig winterization now 'down to a science'  

Microsoft Academic Search

Present-day winterization of drilling rigs in Alaska has added significantly to the cost of drilling but has also resulted in increased manpower efficiency. Double-walled insulated steel wind walls taper in with the derrick to heights of as much as 82 feet to help keep heat inside. Drilling contractors spend as much as $3 million per rig for winterization. Many rigs

1982-01-01

146

La Belle: rigging in the days of the spritsail topmast, a reconstruction of a seventeenth-century ship's rig  

E-print Network

LA BELLE: RIGGING IN THE DAYS OF THE SPRITSAIL TOPMAST, A RECONSTRUCTION OF A SEVENTEENTH-CENTURY SHIP’S RIG A Thesis by CATHARINE LEIGH INBODY CORDER Submitted to the Office of Graduate Studies of Texas A&M University... in partial fulfillment of the requirements for the degree of MASTER OF ARTS December 2007 Major Subject: Anthropology LA BELLE: RIGGING IN THE DAYS OF THE SPRITSAIL TOPMAST, A RECONSTRUCTION OF A SEVENTEENTH-CENTURY SHIP’S RIG A...

Corder, Catharine Leigh Inbody

2008-10-10

147

Hoisting and Rigging: Pre-use Inspection Criteria for Below-the-Hook Lifting Devices, Slings, and Rigging  

E-print Network

Hoisting and Rigging: Pre-use Inspection Criteria for Below-the-Hook Lifting Devices, Slings, and Rigging Hardware and Accessories URL: http://www-group.slac Department: Field Safety and Building Inspection Program: Hoisting and Rigging Authority: ESH Manual, Chapter

Wechsler, Risa H.

148

La Belle: Rigging in the days of the spritsail topmast, a reconstruction of a seventeenth-century ship's rig  

E-print Network

La Belle’s rigging assemblage has provided a rare and valuable source of knowledge of 17th-century rigging in general and in particular, French and small-ship rigging characteristics. With over 400 individual items including nearly 160 wood and iron...

Corder, Catharine Leigh Inbody

2009-05-15

149

30 CFR 7.306 - Explosion tests.  

Code of Federal Regulations, 2011 CFR

...explosive mixture surrounding the motor assembly. (2) A methane...General test procedures. (1) Motor assemblies being tested shall...integrity of the enclosure, such as oil seals, grease fittings, hose...bearings) removed from the motor assembly. (2) Each...

2011-07-01

150

RIG-I activation inhibits ebolavirus replication.  

PubMed

Hemorrhagic fever viruses are associated with rapidly progressing severe disease with high case fatality, making them of public health and biothreat importance. Effective antivirals are not available for most of the members of this diverse group of viruses. A broad spectrum strategy for antiviral development would be very advantageous. Perhaps the most challenging target would be the highly immunosuppressive filoviruses, ebolavirus and marburgvirus, associated with aerosol infectivity and case fatalities in the 80-90% range. Here we report that activation of evolutionarily conserved cytosolic viral nucleic acid sensor, RIG-I can cause severe inhibition of ebolavirus replication. These findings indicate that RIG-I-based therapies may provide an attractive approach for antivirals against Ebola hemorrhagic fever, and possibly other HF viruses. PMID:19628240

Spiropoulou, Christina F; Ranjan, Priya; Pearce, Melissa B; Sealy, Tara K; Albarińo, César G; Gangappa, Shivaprakash; Fujita, Takashi; Rollin, Pierre E; Nichol, Stuart T; Ksiazek, Thomas G; Sambhara, Suryaprakash

2009-09-15

151

Oscillating-flow regenerator test rig  

NASA Technical Reports Server (NTRS)

This report summarizes work performed in setting up and performing tests on a regenerator test rig. An earlier status report presented test results, together with heat transfer correlations, for four regenerator samples (two woven screen samples and two felt metal samples). Lessons learned from this testing led to improvements to the experimental setup, mainly instrumentation as well as to the test procedure. Given funding and time constraints for this project it was decided to complete as much testing as possible while the rig was set up and operational, and to forego final data reduction and analysis until later. Additional testing was performed on several of the previously tested samples as well an on five newly fabricated samples. The following report is a summary of the work performed at OU, with many of the final test results included in raw data form.

Wood, J. G.; Gedeon, D. R.

1994-01-01

152

Jet Exit Rig Six Component Force Balance  

NASA Technical Reports Server (NTRS)

A new six axis air balance was delivered to the NASA Glenn Research Center. This air balance has an axial force capability of 800 pounds, primary airflow of 10 pounds per second, and a secondary airflow of 3 pounds per second. Its primary use was for the NASA Glenn Jet Exit Rig, a wind tunnel model used to test both low-speed, and high-speed nozzle concepts in a wind tunnel. This report outlines the installation of the balance in the Jet Exit Rig, and the results from an ASME calibration nozzle with an exit area of 8 square-inches. The results demonstrated the stability of the force balance for axial measurements and the repeatability of measurements better than 0.20 percent.

Castner, Raymond; Wolter, John; Woike, Mark; Booth, Dennis

2012-01-01

153

Thermally stable emulsion explosive composition  

SciTech Connect

A thermally stable, cap-sensitive, water-in-oil emulsion explosive composition is described which has a discontinuous aqueous oxidizer salt solution phase containing calcium nitrate, a continuous oil or water-immiscible liquid or organic phase, an emulsifier, and a density reducing agent. The salt solution contains calcium nitrate in an amount of at least 20% by weight based on the total composition. 9 claims.

Sudweeks, W.B.; Lawrence, L.D.

1982-03-30

154

Barge hull for offshore drilling rigs  

SciTech Connect

An improved barge hull for offshore drilling rigs is disclosed. The invention comprises a channel in the bottom of a barge hull extending from the bottom of said barge hull to the back of said barge hull for directing the flow of water under said barge hull to the back of said barge hull in order to disrupt the relative hydrodynamic stability of a body of water immediately behind said barge hull and thereby decrease the towing resistance of said barge hull.

Lorenz, D.B.

1984-06-19

155

Nanoengineered explosives  

DOEpatents

A complex modulated structure is described for reactive elements that have the capability of considerably more heat than organic explosives while generating a working fluid or gas. The explosive and method of fabricating same involves a plurality of very thin, stacked, multilayer structures, each composed of reactive components, such as aluminum, separated from a less reactive element, such as copper oxide, by a separator material, such as carbon. The separator material not only separates the reactive materials, but it reacts therewith when detonated to generate higher temperatures. The various layers of material, thickness of 10 to 10,000 angstroms, can be deposited by magnetron sputter deposition. The explosive detonates and combusts a high velocity generating a gas, such as CO, and high temperatures. 2 figs.

Makowiecki, D.M.

1996-04-09

156

Nanoengineered explosives  

DOEpatents

A complex modulated structure of reactive elements that have the capability of considerably more heat than organic explosives while generating a working fluid or gas. The explosive and method of fabricating same involves a plurality of very thin, stacked, multilayer structures, each composed of reactive components, such as aluminum, separated from a less reactive element, such as copper oxide, by a separator material, such as carbon. The separator material not only separates the reactive materials, but it reacts therewith when detonated to generate higher temperatures. The various layers of material, thickness of 10 to 10,000 angstroms, can be deposited by magnetron sputter deposition. The explosive detonates and combusts a high velocity generating a gas, such as CO, and high temperatures.

Makowiecki, Daniel M. (Livermore, CA)

1996-01-01

157

49 CFR 173.59 - Description of terms for explosives.  

...2014-10-01 false Description of terms for explosives. 173.59 Section 173.59 Transportation...173.59 Description of terms for explosives. For the purpose of this subchapter...oil mixture (ANFO). A blasting explosive containing no essential...

2014-10-01

158

Population Explosion  

NSDL National Science Digital Library

A series of experiments explore the effects of increased population growth on a population of Fast Plants. Through these inquiries, students will better understand the many substantial and pertinent issues surrounding human population explosion on Earth.These experiments can be adjusted toward middle, high school or post-secondary levels.

Program, The W.

159

Explosive complexes  

DOEpatents

Lead-free primary explosives of the formula [M.sup.II(A).sub.R(B.sup.X).sub.S](C.sup.Y).sub.T, where A is 1,5-diaminotetrazole, and syntheses thereof are described. Substantially stoichiometric equivalents of the reactants lead to high yields of pure compositions thereby avoiding dangerous purification steps.

Huynh, My Hang V. (Los Alamos, NM)

2011-08-16

160

Explosive complexes  

DOEpatents

Lead-free primary explosives of the formula [M.sup.II(A).sub.R(B.sup.X).sub.S](C.sup.Y).sub.T, where A is 1,5-diaminotetrazole, and syntheses thereof are described. Substantially stoichiometric equivalents of the reactants lead to high yields of pure compositions thereby avoiding dangerous purification steps.

Huynh, My Hang V. (Los Alamos, NM)

2009-09-22

161

Development of a test rig for a helium twin-screw compressor  

NASA Astrophysics Data System (ADS)

A large helium cryogenic system is being developed for use in great science projects, such as the International Thermonuclear Experimental Reactor (ITER), Large Helical Device (LHD), and the Experimental Advanced Superconducting Tokamak (EAST). In this cryogenic system, a twin-screw compressor is a key component. Therefore, it is necessary to obtain the compressor performance. To obtain the performance characteristics, a test rig for the compressor has been built. All the important performance parameters, including adiabatic efficiency, volumetric efficiency, oil injection characteristic, and noise characteristic can be acquired with the rig when sensors are installed in the test system. With the test performance, the helium twin-screw compressor can be evaluated. Using these results, the design of the compressor can be improved.

Wang, B. M.; Hu, Z. J.; Zhang, P.; Li, Q.

2014-01-01

162

Deep Water: The Gulf Oil Disaster and the Future of Offshore Drilling. Recommendations.  

National Technical Information Service (NTIS)

The explosion that tore through the Deepwater Horizon drilling rig last April 20th, as the rigs crew completed drilling the exploratory Macondo well deep under the waters of the Gulf of Mexico, began a human, economic, and environmental disaster. Eleven c...

2011-01-01

163

The role of the rigged Hilbert space in Quantum Mechanics  

E-print Network

There is compelling evidence that, when continuous spectrum is present, the natural mathematical setting for Quantum Mechanics is the rigged Hilbert space rather than just the Hilbert space. In particular, Dirac's bra-ket formalism is fully implemented by the rigged Hilbert space rather than just by the Hilbert space. In this paper, we provide a pedestrian introduction to the role the rigged Hilbert space plays in Quantum Mechanics, by way of a simple, exactly solvable example. The procedure will be constructive and based on a recent publication. We also provide a thorough discussion on the physical significance of the rigged Hilbert space.

R. de la Madrid

2005-02-09

164

Field Demonstraton of Existing Microhole Coiled Tubing Rig (MCTR) Technology  

SciTech Connect

The performance of an advanced Microhole Coiled Tubing Rig (MCTR) has been measured in the field during the drilling of 25 test wells in the Niobrara formation of Western Kansas and Eastern Colorado. The coiled tubing (CT) rig designed, built and operated by Advanced Drilling Technologies (ADT), was documented in its performance by GTI staff in the course of drilling wells ranging in depth from 500 to nearly 3,000 feet. Access to well sites in the Niobrara for documenting CT rig performance was provided by Rosewood Resources of Arlington, VA. The ADT CT rig was selected for field performance evaluation because it is one of the most advanced commercial CT rig designs that demonstrate a high degree of process integration and ease of set-up and operation. Employing an information collection protocol, data was collected from the ADT CT rig during 25 drilling events that encompassed a wide range of depths and drilling conditions in the Niobrara. Information collected included time-function data, selected parametric information indicating CT rig operational conditions, staffing levels, and field observations of the CT rig in each phase of operation, from rig up to rig down. The data obtained in this field evaluation indicates that the ADT CT rig exhibited excellent performance in the drilling and completion of more than 25 wells in the Niobrara under varied drilling depths and formation conditions. In the majority of the 25 project well drilling events, ROP values ranged between 300 and 620 feet per hour. For all but the lowest 2 wells, ROP values averaged approximately 400 feet per hour, representing an excellent drilling capability. Most wells of depths between 500 and 2,000 feet were drilled at a total functional rig time of less than 16 hours; for wells as deep at 2,500 to 3,000 feet, the total rig time for the CT unit is usually well under one day. About 40-55 percent of the functional rig time is divided evenly between drilling and casing/cementing. The balance of time is divided among the remaining four functions of rig up/rig down, logging, lay down bottomhole assembly, and pick up bottomhole assembly. Observations made during all phases of CT rig operation at each of the project well installations have verified a number of characteristics of the technology that represent advantages that can produce significant savings of 25-35 percent per well. Attributes of the CT rig performance include: (1) Excellent hole quality with hole deviation amounting to 1-2 degrees; (2) Reduced need for auxiliary equipment; (3) Efficient rig mobilization requiring only four trailers; (4) Capability of ''Zero Discharge'' operation; (5) Improved safety; and, (6) Measurement while drilling capability. In addition, commercial cost data indicates that the CT rig reduces drilling costs by 25 to 35% compared to conventional drilling technology. Widespread commercial use of the Microhole Coiled Tubing technology in the United States for onshore Lower-48 drilling has the potential of achieving substantially positive impacts in terms of savings to the industry and resource expansion. Successfully commercialized Microhole CT Rig Technology is projected to achieve cumulative savings in Lower-48 onshore drilling expenditures of approximately 6.8 billion dollars by 2025. The reduced cost of CT microhole drilling is projected to enable the development of gas resources that would not have been economic with conventional methods. Because of the reduced cost of drilling achieved with CT rig technology, it is estimated that an additional 22 Tcf of gas resource will become economic to develop. In the future, the Microhole Coiled Tubing Rig represents an important platform for the continued improvement of drilling that draws on a new generation of various technologies to achieve goals of improved drilling cost and reduced impact to the environment.

Kent Perry; Samih Batarseh; Sheriff Gowelly; Thomas Hayes

2006-05-09

165

Above Ground Geothermal and Allied Technologies Masters Scholarship in Energy & Materials: design of a rig  

E-print Network

of a rig to test materials for Organic Rankine Cycle powerplant Department of Mechanical Engineering, for their thesis research project, design a rig to test corrosion and scaling of sample materials. The rig the completed rig and obtain the first set of results. The rig will expose the materials to flows of different

Hickman, Mark

166

Explosive Joining  

NASA Technical Reports Server (NTRS)

Laurence J. Bement of Langley Research Center invented a technique to permit metal joining operations under hazardous or inaccessible conditions. The process, which provides a joint with double the strength of the parent metal, involves the use of very small quantities of ribbon explosive to create hermetically sealed joints. When the metal plates are slammed together by the explosion's force, joining is accomplished. The collision causes a skin deep melt and ejection of oxide films on the surfaces, allowing a linkup of electrons that produce superstrong, uniform joints. The technique can be used to join metals that otherwise would not join and offers advantages over mechanical fasteners and adhesives. With Langley assistance, Demex International Ltd. refined and commercialized the technology. Applications include plugging leaking tubes in feedwater heaters. Demex produces the small plugs, associated sleeves and detonators. The technology allows faster plugging, reduces downtime, cuts plugging costs and increases reliability.

1989-01-01

167

78 FR 64246 - Commerce in Explosives; List of Explosives Materials  

Federal Register 2010, 2011, 2012, 2013

...nitroisobutametriol trinitrate]. Nitrate explosive mixtures. Nitrate sensitized with gelled nitroparaffin. Nitrated carbohydrate explosive. Nitrated glucoside explosive. Nitrated polyhydric alcohol explosives. Nitric acid and a nitro aromatic...

2013-10-28

168

Corrosion evaluation of fuel canister crusher rigging  

SciTech Connect

A fuel canister crusher with attached rigging is located in the 105 K-East Basin discharge chute. This equipment is slated to be moved as part of seismic mitigation to prevent a major basin leak through a construction joint located in the base of the chute. This corrosion analysis assessed the load-bearing ability of the rigging, which consists of shackles and thimble-spliced wire rope. The K-East Basin demineralized water results in corrosion rates of <2 mil/year (<0.05 mm/year) for carbon, low-alloy carbon, and stainless steels. The galvanized carbon steel shackles (with low-alloy steel anchor pins) have experienced negligible corrosion and are judged to be mechanically unaffected by their water exposure. The carbon steel wire rope and stainless steel thimbles have undergone minimal corrosion. Due to the small amount of corrosion products (as seen from video inspection), the absence of wire breakage, and a Factor of Safety calculation, it is judged that the wire rope and thimbles would withstand the proposed relocation activities.

Graves, C.E.

1994-11-02

169

Geometry and rigged strings in Bethe Ansatz  

NASA Astrophysics Data System (ADS)

The main purpose of this report is a thorough analysis of completeness of solutions of the one-dimensional Heisenberg Hamiltonian through the hypothesis of strings. A somehow astonishing conclusion emerges from studying of the structure of the classical configuration space of this system. Namely, all allowed information concerning quantum states, which are exact solutions of the Bethe equations, encoded in quantum numbers, are predictable via a bijection between the set of the magnetic configurations and the string configurations. This startling and beautiful observation constitutes the proof of the completeness of the eigenstates of the Heisenberg Hamiltonian, deduced in a purely combinatorial way. We interpret the set of all magnetic configurations with a fixed number r of spin deviations as the classical configuration space of a hypothetic system of r Bethe pseudoparticles, which move, in a stroboscopic manner, on the magnetic ring. The geometry of this configuration space, induced by the action of Heisenberg Hamiltonian and the translation symmetry group of the ring, implies the structure of a locally r-dimensional hypercubic lattice with well defined F-dimensional boundaries, 1 <= F <= r. We demonstrate that rigged string configurations originate from these boundaries, depending upon the island structure of spin deviations. We show that a relatively simple combinatoric definition of rigged strings reproduces completely exact results of Bethe Ansatz. It is expressed in terms of a combined bijection: Robinson-Schensted with Kerov- Kirillov-Reshetikhin (RSKKR) which produces a geography of exact Bethe Ansatz solutions on the classical configuration space.

Jakubczyk, D.; Lulek, T.; Jakubczyk, P.; Lulek, B.

2006-02-01

170

Omni-rig: Linear Self-recalibration of a Rig with Varying Internal and External Assaf Zomet Lior Wolf and Amnon Shashua  

E-print Network

Omni-rig: Linear Self-recalibration of a Rig with Varying Internal and External Parameters Assaf of building a moving vision platform (a Rig) that once calibrated can thereon self-adjust to changes in its measurements. We term this calibration paradigm "Omni- Rig". We assume that after calibration the cameras may

Wolf, Lior

171

75 FR 71455 - Agency Information Collection Activities; Submission for OMB Review; Comment Request; Rigging...  

Federal Register 2010, 2011, 2012, 2013

...Submission for OMB Review; Comment Request; Rigging Equipment for Material Handling ACTION...collection request (ICR) titled, ``Rigging Equipment for Material Handling (29 CFR...collection of information provisions of the rigging equipment for material handling...

2010-11-23

172

RING COMPLETION OF RIG CATEGORIES NILS A. BAAS, BJORN IAN DUNDAS, BIRGIT RICHTER AND JOHN ROGNES  

E-print Network

RING COMPLETION OF RIG CATEGORIES NILS A. BAAS, BJORN IAN of group compl* *eting within the context of rig categories (also known as bimonoidal categories). Given a rig cat* *egory R we construct a natural additive group completion ~Rthat retains

Rognes, John

173

Design and construction of rigs for studying surface condensation and creating anodized metal oxide surfaces  

E-print Network

This thesis details the design and construction of a rig for studying surface condensation and a rig for creating anodized metal oxides (AMOs). The condensation rig characterizes condensation for different surfaces; this ...

Sun, Wei-Yang

2011-01-01

174

A structure-based model of RIG-I activation  

PubMed Central

A series of high-resolution crystal structures of RIG-I and RIG-I:dsRNA cocrystals has recently been reported. Comparison of these structures provides considerable insight into how this innate immune pattern recognition receptor is activated upon detecting and binding a certain class of viral RNAs. PMID:23118418

Kolakofsky, Daniel; Kowalinski, Eva; Cusack, Stephen

2012-01-01

175

Hoisting and Rigging: Lift Planning and Control for Ordinary Lifts  

E-print Network

rings, spreader beams, slings, etc 2. Show attachment points (how rigging gear will be attached to load such as a lifter or spreader beam 5. Show proper orientation of eyebolts 6. Indicate the center of gravityPlan # Hoisting and Rigging: Lift Planning and Control for Ordinary Lifts Department or Group Plan

Wechsler, Risa H.

176

The rigged Hilbert space approach to the Gamow states  

E-print Network

We use the resonances of the spherical shell potential to present a thorough description of the Gamow (quasinormal) states within the rigged Hilbert space. It will be concluded that the natural setting for the Gamow states is a rigged Hilbert space whose test functions fall off at infinity faster than Gaussians.

Rafael de la Madrid

2012-10-12

177

The Application of Roller Rigs to Railway Vehicle Dynamics  

Microsoft Academic Search

SUMMARY Roller rigs have been built world-wide to research into the dynamics of railway vehicles and they have particularly been applied to the development of high-speed trains. This survey takes into consideration both full scale as well as small scale model roller rigs. Besides performance, most important experimental work and the emphasis of application, the scaling strategies of model test

Alfred Jaschinski; Hugues Chollet; Simon Iwnicki; Alan Wickens; JURGEN VON WURZEN

1999-01-01

178

Advanced Hot Section Materials and Coatings Test Rig  

SciTech Connect

The Hyperbaric Advanced Hot Section Materials & Coating Test Rig program provides design and implementation of a laboratory rig capable of simulating the hot gas path conditions of coal-gas fired industrial gas turbine engines. The principal activities during this reporting period were the continuation of test section detail design and developing specifications for auxiliary systems and facilities.

Dan Davies

2004-10-30

179

Rig automation: where it's been and where it's going  

SciTech Connect

For over 30 years dreamers, tinkerers and engineers have attempted to automate various drilling functions. Now this effort is paying off, and a partially automated rig is no longer a curiosity. Fully automated and computerized rigs are on the way. For the contractor this means higher productivity, but more maintenance and training responsibilities.

Rinaldi, R.

1982-06-01

180

Analysis of Explosives  

Microsoft Academic Search

The analysis of explosives is of major importance in several analytical fields:1. Forensic identification of explosives is a major problem in the criminalistic investigation of a bombing which involves connecting the type of explosive used with the suspect. The detection and identification of explosive residues in debris material constitutes a highly difficult task. The thermal instability of most explosives, along

Jehuda Yinon; John C. Hoffsommer

1977-01-01

181

Jack-up leveling barge for shallow water rigs  

SciTech Connect

Generally, the only alternative to a shell pad is a shallow water jack-up or a submersible rig. And in some instances, it is impractical to tow these mobile rigs to the location because of the necessary dredging. A possible solution to this problem, devised by Chain Jacks, Inc., is a jack-up leveling barge that extends its legs and pads to the bottom in waters ranging to 35 ft deep, then ballasts down to a depth of 10 ft or so below the surface. The barge-mounted rigs move over the leveling barges, ballast down and start rigging up. At this point, the leveling barge de-ballasts to minimize the load on the legs and mats. Chain Jack says the concept will enable barge mounted rigs to drill in waters ranging from 25 to 35 ft, and the cost will be considerably less than that of jack-ups or submersibles.

Not Available

1982-07-01

182

Advanced Hot Section Materials and Coatings Test Rig  

SciTech Connect

Phase I of the Hyperbaric Advanced Hot Section Materials & Coating Test Rig Program has been successfully completed. Florida Turbine Technologies has designed and planned the implementation of a laboratory rig capable of simulating the hot gas path conditions of coal gas fired industrial gas turbine engines. Potential uses of this rig include investigations into environmental attack of turbine materials and coatings exposed to syngas, erosion, and thermal-mechanical fatigue. The principle activities during Phase 1 of this project included providing several conceptual designs for the test section, evaluating various syngas-fueled rig combustor concepts, comparing the various test section concepts and then selecting a configuration for detail design. Conceptual definition and requirements of auxiliary systems and facilities were also prepared. Implementation planning also progressed, with schedules prepared and future project milestones defined. The results of these tasks continue to show rig feasibility, both technically and economically.

Dan Davis

2006-09-30

183

Explosion modelling for complex geometries  

NASA Astrophysics Data System (ADS)

A literature review suggested that the combined effects of fuel reactivity, obstacle density, ignition strength, and confinement result in flame acceleration and subsequent pressure build-up during a vapour cloud explosion (VCE). Models for the prediction of propagating flames in hazardous areas, such as coal mines, oil platforms, storage and process chemical areas etc. fall into two classes. One class involves use of Computation Fluid Dynamics (CFD). This approach has been utilised by several researchers. The other approach relies upon a lumped parameter approach as developed by Baker (1983). The former approach is restricted by the appropriateness of sub-models and numerical stability requirements inherent in the computational solution. The latter approach raises significant questions regarding the validity of the simplification involved in representing the complexities of a propagating explosion. This study was conducted to investigate and improve the Computational Fluid Dynamic (CFD) code EXPLODE which has been developed by Green et al., (1993) for use on practical gas explosion hazard assessments. The code employs a numerical method for solving partial differential equations by using finite volume techniques. Verification exercises, involving comparison with analytical solutions for the classical shock-tube and with experimental (small-scale, medium and large-scale) results, demonstrate the accuracy of the code and the new combustion models but also identify differences between predictions and the experimental results. The project has resulted in a developed version of the code (EXPLODE2) with new combustion models for simulating gas explosions. Additional features of this program include the physical models necessary to simulate the combustion process using alternative combustion models, improvement to the numerical accuracy and robustness of the code, and special input for simulation of different gas explosions. The present code has the capability of predicting venting failures by different combustion models, something that was not shown clearly in the open literature by the previous numerical studies in gas explosions. The work accomplished in this research was undertaken put of the need for an objective method to predict explosion parameters for vapour cloud explosions in confined and semi-confined areas. The thesis describes basic features of a numerical explosion model that has been developed for predicting explosion pressure and flame propagation in confined and semi confined regions. The validation of the code and combustion models against analytical and several experimental data supports the code and its combustion models as a good tool for prediction of VCEs. This thesis starts with a basic description of explosion, assessment methods, theory, turbulent combustion, different combustion models and concludes with a discussion of the results and areas of uncertainty.

Nehzat, Naser

184

Location of potential interest for fracturing oil shale with nuclear explosives for in situ retorting, Piceance Creek Basin, Rio Blanco County, Colorado  

USGS Publications Warehouse

Analysis of oil assays, structure sections, and isopach maps of the Parachute Creek Member of the Green River Formation indicates that numerous locations in the western part of the Piceance Creek basin could be selected with an oil shale section at least 500 feet thick that contains not less than 20 gallons per ton of shale oil, and has at least 800 feet of overburden.

Ege, J.R.

1967-01-01

185

Universe Explosions  

E-print Network

A scenario for a quantum big crunch to big bang transition is proposed. We first clarify the similarities between this transition and the final stages of black hole evaporation. The black hole and the universe are thought of as quantum states. The importance of an external observer for understanding the big crunch to big bang transition is emphasized. Then, relying on the similarities between the black hole and the universe, we propose that the transition should be described as an explosion that connects the contracting phase to the expanding one. The explosion occurs when entropy bounds are saturated, or equivalently when the states cease to be semiclassically (meta)stable. We discuss our scenario in three examples: collapsing dust, a brane universe falling into a bulk black hole in anti-de Sitter space, and a contracting universe filled with a negative cosmological constant and a small amount of matter. We briefly discuss the late time observables that may carry some information about the state of the universe before the transition.

Ram Brustein; Maximilian Schmidt-Sommerfeld

2012-09-24

186

Studies of the laser-induced fluorescence of explosives and explosive compositions.  

SciTech Connect

Continuing use of explosives by terrorists throughout the world has led to great interest in explosives detection technology, especially in technologies that have potential for standoff detection. This LDRD was undertaken in order to investigate the possible detection of explosive particulates at safe standoff distances in an attempt to identify vehicles that might contain large vehicle bombs (LVBs). The explosives investigated have included the common homogeneous or molecular explosives, 2,4,6-trinitrotoluene (TNT), pentaerythritol tetranitrate (PETN), cyclonite or hexogen (RDX), octogen (HMX), and the heterogeneous explosive, ammonium nitrate/fuel oil (ANFO), and its components. We have investigated standard excited/dispersed fluorescence, laser-excited prompt and delayed dispersed fluorescence using excitation wavelengths of 266 and 355 nm, the effects of polarization of the laser excitation light, and fluorescence imaging microscopy using 365- and 470-nm excitation. The four nitro-based, homogeneous explosives (TNT, PETN, RDX, and HMX) exhibit virtually no native fluorescence, but do exhibit quenching effects of varying magnitude when adsorbed on fluorescing surfaces. Ammonium nitrate and fuel oil mixtures fluoresce primarily due to the fuel oil, and, in some cases, due to the presence of hydrophobic coatings on ammonium nitrate prill or impurities in the ammonium nitrate itself. Pure ammonium nitrate shows no detectable fluorescence. These results are of scientific interest, but they provide little hope for the use of UV-excited fluorescence as a technique to perform safe standoff detection of adsorbed explosive particulates under real-world conditions with a useful degree of reliability.

Hargis, Philip Joseph, Jr. (,; .); Thorne, Lawrence R.; Phifer, Carol Celeste; Parmeter, John Ethan; Schmitt, Randal L.

2006-10-01

187

Characteristics of Black Carbon Aerosol from a Surface Oil Burn During the Deepwater Horizon Oil Spill  

NASA Astrophysics Data System (ADS)

Black carbon (BC) aerosol mass mixing ratio and microphysical properties were measured from the NOAA P-3 aircraft during active surface oil burning subsequent to the Deepwater Horizon oil rig explosion in April 2010. Approximately 4% of the combusted material was released into the atmosphere as BC. The total amount of BC introduced to the atmosphere of the Gulf of Mexico via surface burning of oil during the 9-week spill is estimated to be (1.35 ± 0.72) x106 kg. The median mass diameter of BC particles observed in the burning plume was much larger than that of the non-plume Gulf background air. The plume BC particles were internally mixed with very little non-refractory material, a feature typical of fresh emissions from fairly efficient fossil-fuel burning sources and atypical of BC in biomass burning plumes. BC dominated the total accumulation-mode aerosol in both mass and number. The BC mass-specific extinction cross-section is determined at 405 and 532 nm.

Perring, A. E.; Schwarz, J. P.; Spackman, J. R.; Bahreini, R.; De Gouw, J. A.; Gao, R.; Holloway, J. S.; Lack, D. A.; Langridge, J. M.; Peischl, J.; Middlebrook, A. M.; Ryerson, T. B.; Warneke, C.; Watts, L. A.; Fahey, D. W.

2011-12-01

188

Characteristics of black carbon aerosol from a surface oil burn during the Deepwater Horizon oil spill  

NASA Astrophysics Data System (ADS)

Black carbon (BC) aerosol mass mixing ratio and microphysical properties were measured from the NOAA P-3 aircraft during active surface oil burning subsequent to the Deepwater Horizon oil rig explosion in April 2010. Approximately 4% of the combusted material was released into the atmosphere as BC. The total amount of BC introduced to the atmosphere of the Gulf of Mexico via surface burning of oil during the 9-week spill is estimated to be (1.35 ± 0.72) × 106 kg. The median mass diameter of BC particles observed in the burning plume was much larger than that of the non-plume Gulf background air and previously sampled from a variety of sources. The plume BC particles were internally mixed with very little non-refractory material, a feature typical of fresh emissions from fairly efficient fossil-fuel burning sources and atypical of BC in biomass burning plumes. BC dominated the total accumulation-mode aerosol in both mass and number. The BC mass-specific extinction cross-section was 10.2 ± 4.1 and 7.1 ± 2.8 m2/g at 405 and 532 nm respectively. These results help constrain the properties of BC emissions associated with DWH and other large spills.

Perring, A. E.; Schwarz, J. P.; Spackman, J. R.; Bahreini, R.; de Gouw, J. A.; Gao, R. S.; Holloway, J. S.; Lack, D. A.; Langridge, J. M.; Peischl, J.; Middlebrook, A. M.; Ryerson, T. B.; Warneke, C.; Watts, L. A.; Fahey, D. W.

2011-09-01

189

Explosive stimulation of a geothermal well: GEOFRAC  

SciTech Connect

This paper describes the first known explosive stimulation successfully conducted in a geothermal well. Two tests were performed in a 2690-meter-(8826-ft.) deep Union Oil well at the Geysers field in Northern California in December 1981. The heat-resistant process, called GEOFRAC, uses a new unique, explosive HITEX 2, which is a nondetonable solid at room temperature. Upon melting at a temperature of 177[degrees]C (350[degrees]F), the HITEX 2 liquid becomes an explosive that can be safely heated to temperatures greater than 260[degrees]C (500[degrees]F). These unique properties of the explosive were exploited in the GEOFRAC process through the cooperative efforts of Physics International Company (PI), Rocket Research Company (RRC), Union oil Company (UO), and the university of California Los Alamos National Laboratories (LANL).

Mumma, D.M. (Physics International Co., San Leandro, CA (United States))

1982-07-01

190

Comparison of High-Speed Operating Characteristics of Size 215 Cylindrical-Roller Bearings as Determined in Turbojet Engine and in Laboratory Test Rig  

NASA Technical Reports Server (NTRS)

A comparison of the operating characteristics of 75-millimeter-bore (size 215) cylindrical-roller one-piece inner-race-riding cage-type bearings was made by means of a laboratory test rig and a turbojet engine. Cooling correlation parameters were determined by means of dimensional analysis, and the generalized results for both the inner- and the outer-race bearing operating temperatures are computed for the laboratory test rig and the turbojet engine. A method is given that enables the designer to predict the inner- and outer-race turbine roller-bearing temperatures from single curves, regardless of variations in speed, load, oil flow, oil inlet temperature, oil inlet viscosity, oil-jet diameter, or any combination of these parameters.

Macks, E Fred; Nemeth, Zolton N

1952-01-01

191

Automatic detection and tracking of pedestrians from a moving stereo rig  

E-print Network

Automatic detection and tracking of pedestrians from a moving stereo rig Konrad Schindlera camera rig10 mounted on a moving camera platform.11 The described task requires a combination platforms used in this work. (a), (b) stereo rig mounted on child strollers. (c) stereo rig mounted on Smart

Schindler, Konrad

192

Direct Estimation of Motion and Extended Scene Structure from a Moving Stereo Rig  

E-print Network

Direct Estimation of Motion and Extended Scene Structure from a Moving Stereo Rig Gideon P. Stein) of a calibrated Stereo Rig and point and line image feature measure­ ments seen at two time instances of the rig and kinematics of the 3D motion of the Rig. We establish a fundamental result showing that 3 quadruples of point

Shashua, Amnon

193

Nonlinear System Identification and Modeling of A New Fatigue Testing Rig Based on Inertial Forces  

E-print Network

Nonlinear System Identification and Modeling of A New Fatigue Testing Rig Based on Inertial Forces fatigue testing rig based on inertial forces is in- troduced. The test rig has capacity to mimic various loading conditions including high frequency loads. The rig design al- lows reconfigurations to accommodate

Chelidze, David

194

Initiative for Explosives Detection  

E-print Network

Initiative for Explosives Detection Highly Concealed Bulk Explosives Detection This focus area emphasizes the detection of explosives or IEDs hidden in vehicles, buildings or various types of containers of highly concealed explosives include the development of enhanced energy sources, improved electronics

195

1. STARBOARD PROFILE WITH DREDGE BASKET BEING RAISEDNOTE 'LAZYJACK' RIGGING ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

1. STARBOARD PROFILE WITH DREDGE BASKET BEING RAISED-NOTE 'LAZYJACK' RIGGING TO GUIDE SAILS DOWN TO BOOM AND CLUB (REQUIRES LESS CREW) - KATHRYN-Two-sail Bateau "Skipjack", Dogwood Harbor, Chesapeake Bay, Tilghman, Talbot County, MD

196

Regenerative Fuel Cell Test Rig at Glenn Research Center  

NASA Technical Reports Server (NTRS)

The regenerative fuel cell development effort at Glenn Research Center (GRC) involves the integration of a dedicated fuel cell and electrolyzer into an energy storage system test rig. The test rig consists of a fuel cell stack, an electrolysis stack, cooling pumps, a water transfer pump, gas recirculation pumps, phase separators, storage tanks for oxygen (O2) and hydrogen (H2), heat exchangers, isolation valves, pressure regulators, interconnecting tubing, nitrogen purge provisions, and instrumentation for control and monitoring purposes. The regenerative fuel cell (RFC) thus formed is a completely closed system which is capable of autonomous cyclic operation. The test rig provides direct current (DC) load and DC power supply to simulate power consumption and solar power input. In addition, chillers are used as the heat sink to dissipate the waste heat from the electrochemical stack operation. Various vents and nitrogen (N2) sources are included in case inert purging is necessary to safe the RFC test rig.

Chang, Bei-Jiann; Johnson, Donald W.; Garcia, Christopher P.; Jakupca, Ian J.; Scullin, Vincent J.; Bents, David J.

2003-01-01

197

19. DECK VIEW LOOKING FORWARD WITH MAST, RIGGING AND BOWSPRIT ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

19. DECK VIEW LOOKING FORWARD WITH MAST, RIGGING AND BOWSPRIT DETAILS - HATCH COVER REMOVED TO SHOW CENTERBOARD TRUNK - KATHRYN-Two-sail Bateau "Skipjack", Dogwood Harbor, Chesapeake Bay, Tilghman, Talbot County, MD

198

40. SOUTHWEST CORNER OF STAGE SHOWING RIGGING FOR FLYING SETS, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

40. SOUTHWEST CORNER OF STAGE SHOWING RIGGING FOR FLYING SETS, LOCATION OF ORIGINAL DOORS IN PROSCENIUM WALL, AND COUNTERWEIGHTS FOR STAGE CURTAIN. - Auditorium Building, 430 South Michigan Avenue, Chicago, Cook County, IL

199

14. FACILITY IDENTIFICATION STENCILED ON ROOF BEAM, 'RIGGING LOFT' PORTION ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

14. FACILITY IDENTIFICATION STENCILED ON ROOF BEAM, 'RIGGING LOFT' PORTION OF BUILDING 4. - Chollas Heights Naval Radio Transmitting Facility, Public Works Shop, 6410 Zero Road, San Diego, San Diego County, CA

200

Using rigging and transfer to animate 3D characters  

E-print Network

Transferring a mesh or skeletal animation onto a new mesh currently requires significant manual effort. For skeletal animations, this involves rigging the character, by specifying how the skeleton is positioned relative ...

Baran, Ilya, 1981-

2010-01-01

201

Optically detonated explosive device  

NASA Technical Reports Server (NTRS)

A technique and apparatus for optically detonating insensitive high explosives, is disclosed. An explosive device is formed by containing high explosive material in a house having a transparent window. A thin metallic film is provided on the interior surface of the window and maintained in contact with the high explosive. A laser pulse provided by a Q-switched laser is focussed on the window to vaporize the metallic film and thereby create a shock wave which detonates the high explosive. Explosive devices may be concurrently or sequentially detonated by employing a fiber optic bundle to transmit the laser pulse to each of the several individual explosive devices.

Yang, L. C.; Menichelli, V. J. (inventors)

1974-01-01

202

Chromospheric explosions  

NASA Technical Reports Server (NTRS)

Three issues relative to chromospheric explosions were debated. (1) Resolved: The blue-shifted components of x-ray spectral lines are signatures of chromospheric evaporation. It was concluded that the plasma rising with the corona is indeed the primary source of thermal plasma observed in the corona during flares. (2) Resolved: The excess line broading of UV and X-ray lines is accounted for by a convective velocity distribution in evaporation. It is concluded that the hypothesis that convective evaporation produces the observed X-ray line widths in flares is no more than a hypothesis. It is not supported by any self-consistent physical theory. (3) Resolved: Most chromospheric heating is driven by electron beams. Although it is possible to cast doubt on many lines of evidence for electron beams in the chromosphere, a balanced view that debaters on both sides of the question might agree to is that electron beams probably heat the low corona and upper chromosphere, but their direct impact on evaporating the chromosphere is energetically unimportant when compared to conduction. This represents a major departure from the thick-target flare models that were popular before the Workshop.

Doschek, G. A.; theory. (3) Resolved: Most chromospheric h; theory. (3) Resolved: Most chromospheric h

1986-01-01

203

Unique rigging key to transformer change-out  

SciTech Connect

A contractor`s rigging plan and the procedures used to replace four transformers at a nuclear power plant are briefly outlined. The work scope involved removing four 340-ton transformed, fully dressed, and replacing them in 10 days. A streamlined changeout plan coordinated the project and used a new rigging to complete the work in three days. The five stages of the work, which used specially designed telescoping beams with 160-ton jacks for lifting, are described.

Hansen, T.

1996-09-01

204

Promotion operator on rigged configurations of type A  

E-print Network

Recently, the analogue of the promotion operator on crystals of type A under a generalization of the bijection of Kerov, Kirillov and Reshetikhin between crystals (or Littlewood--Richardson tableaux) and rigged configurations was proposed. In this paper, we give a proof of this conjecture. This shows in particular that the bijection between tensor products of type A_n^{(1)} crystals and (unrestricted) rigged configurations is an affine crystal isomorphism.

Schilling, Anne

2009-01-01

205

ADVANCED HOT SECTION MATERIALS AND COATINGS TEST RIG  

SciTech Connect

The Hyperbaric Advanced Hot Section Materials & Coating Test Rig program initiated this quarter, provides design and implementation of a laboratory rig capable of simulating the hot gas path conditions of coal-gas fired industrial gas turbine engines. The principle activity during this first reporting period were preparing for and conducting a project kick-off meeting, working through plans for the project implementation, and beginning the conceptual design of the test section.

Scott Reome; Dan Davies

2004-01-01

206

Rig Rover System views wellhead from every angle  

SciTech Connect

The Rig Rover System (RRS), a new type of submersible remotely operated vehicle (ROV), has been introduced by Deep Ocean Technology, Oakland, California. It is described as a sophisticated wellhead TV with remote controlled arms, or a remotely controlled vehicle that is deployed like a wellhead TV. The RRS is available in 2 models. Rig Rover was designed specifically to support offshore exploration drilling to 2000 ft. of water.

Not Available

1983-09-01

207

Ammonium nitrate explosive systems  

DOEpatents

Novel explosives which comprise mixtures of ammonium nitrate and an ammonium salt of a nitroazole in desired ratios are disclosed. A preferred nitroazole is 3,5-dinitro-1,2,4-triazole. The explosive and physical properties of these explosives may readily be varied by the addition of other explosives and oxidizers. Certain of these mixtures have been found to act as ideal explosives.

Stinecipher, Mary M. (Los Alamos, NM); Coburn, Michael D. (Los Alamos, NM)

1981-01-01

208

Ammonium nitrate explosive systems  

SciTech Connect

Novel explosives which comprise mixtures of ammonium nitrate and an ammonium salt of a nitroazole in desired ratios are disclosed. A preferred nitroazole is 3,5-dinitro-1,2,4-triazole. The explosive and physical properties of these explosives may readily be varied by the addition of other explosives and oxidizers. Certain of these mixtures have been found to act as ideal explosives.

Coburn, M.D.; Stinecipher, M.M.

1981-11-17

209

Description of an oscillating flow pressure drop test rig  

NASA Technical Reports Server (NTRS)

A test rig designed to generate heat exchanger pressure drop information under oscillating flow conditions is described. This oscillating flow rig is based on a variable stroke and variable frequency linear drive motor. A frequency capability of 120 hertz and a mean test pressure up to 15 mPA (2200 psi) allows for testing at flow conditions found in modern high specific power Stirling engines. An important design feature of this rig is that it utilizes a single close coupled dynamic pressure transducer to measure the pressure drop across the test sample. This eliminates instrumentation difficulties associated with the pressure sensing lines common to differential pressure transducers. Another feature of the rig is that it utilizes a single displacement piston. This allows for testing of different sample lengths and configurations without hardware modifications. All data acquisition and reduction for the rig is performed with a dedicated personal computer. Thus the overall system design efficiently integrates the testing and data reduction procedures. The design methodology and details of the test rig is described.

Wood, J. Gary; Miller, Eric L.; Gedeon, David R.; Koester, Gary E.

1988-01-01

210

AutoReaGas -A CFD-TOOL FOR GAS EXPLOSION HAZARD ANALYSIS A.C.van den Berg, H.G.The and W.P.M.Mercx  

E-print Network

the failure of vital control and communication functions on board. In consequence of this, the incident, Horsham West Sussex RH13 5BA, UK 1. INTRODUCTION Gas explosions constitute a major hazard for offshore gas was demonstrated by the incident with the Piper Alpha rig in 1988 (Petrie^). A small-scale gas explosion caused

Paris-Sud XI, Université de

211

Bioremediation of high explosives  

SciTech Connect

Manufacture and use of high explosives has resulted in contamination of ground water and soils throughout the world. The use of biological methods for remediation of high explosives contamination has received considerable attention in recent years. Biodegradation is most easily studied using organisms in liquid cultures. Thus, the amount of explosive that can be degraded in liquid culture is quite small. However, these experiments are useful for gathering basic information about the biochemical pathways of biodegradation, identifying appropriate organisms and obtaining rates of degradation. The authors` laboratory has investigated all three major areas of explosives bioremediation: explosives in solution, explosives in soil, and the disposal of bulk explosives from demilitarization operations. They investigated the three explosives most commonly used in modern high explosive formulations: 2,4,6-trinitrotoluene (TNT), hexahydro 1,3,5-trinitro-1,3,5-triazine (RDX) and octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX).

Kitts, C.L.; Alvarez, M.A.; Hanners, J.L.; Ogden, K.L.; Vanderberg-Twary, L.; Unkefer, P.J. [Los Alamos National Lab., NM (United States). Chemical Science and Technology Div.

1995-09-01

212

Safeguards cut tank explosion risk during gas flaring  

SciTech Connect

Some operational and system safeguards can significantly reduce the risk of oil-storage tank explosions in gas-flaring operations. These safeguards, discussed here and based on ten different explosion investigations by Westech Industrial Ltd., Calgary, also provide protection against other potential ignition sources such as static electricity and spontaneous combustion of ferric sulfide.

Lapp, K.; Roussakis, N. (Westech Industrial Ltd., Calgary (CA))

1989-08-14

213

Safeguards cut tank explosion risk during gas flaring  

Microsoft Academic Search

Some operational and system safeguards can significantly reduce the risk of oil-storage tank explosions in gas-flaring operations. These safeguards, discussed here and based on ten different explosion investigations by Westech Industrial Ltd., Calgary, also provide protection against other potential ignition sources such as static electricity and spontaneous combustion of ferric sulfide.

K. Lapp; N. Roussakis

1989-01-01

214

Oil and Water Science, Literature and Disaster  

E-print Network

of engineering, biology, political science, creative writing, jour- nalism. For more information, contactOil and Water Science, Literature and Disaster AMST 301/ENG 341 Professor Kristina Bross at the Deepwater Hori- zon oil rig. Students will explore the impact of these events on American science, ecology

215

76 FR 33704 - Incidental Taking of Marine Mammals; Taking of Marine Mammals Incidental to the Explosive Removal...  

Federal Register 2010, 2011, 2012, 2013

...Marine Mammals; Taking of Marine Mammals Incidental to the Explosive Removal of Offshore Structures in the Gulf of Mexico AGENCY...Authorization (LOA) to take marine mammals incidental to the explosive removal of offshore oil and gas structures (EROS) in...

2011-06-09

216

76 FR 35856 - Incidental Taking of Marine Mammals; Taking of Marine Mammals Incidental to the Explosive Removal...  

Federal Register 2010, 2011, 2012, 2013

...Marine Mammals; Taking of Marine Mammals Incidental to the Explosive Removal of Offshore Structures in the Gulf of Mexico AGENCY...Authorization (LOA) to take marine mammals incidental to the explosive removal of offshore oil and gas structures (EROS) in...

2011-06-20

217

75 FR 31423 - Incidental Taking of Marine Mammals; Taking of Marine Mammals Incidental to the Explosive Removal...  

Federal Register 2010, 2011, 2012, 2013

...Marine Mammals; Taking of Marine Mammals Incidental to the Explosive Removal of Offshore Structures in the Gulf of Mexico AGENCY...Authorization (LOA) to take marine mammals incidental to the explosive removal of offshore oil and gas structures (EROS) in...

2010-06-03

218

77 FR 10481 - Incidental Taking of Marine Mammals; Taking of Marine Mammals Incidental to the Explosive Removal...  

Federal Register 2010, 2011, 2012, 2013

...Marine Mammals; Taking of Marine Mammals Incidental to the Explosive Removal of Offshore Structures in the Gulf of Mexico AGENCY...Authorization (LOA) to take marine mammals incidental to the explosive removal of offshore oil and gas structures (EROS) in...

2012-02-22

219

75 FR 8921 - Incidental Taking of Marine Mammals; Taking of Marine Mammals Incidental to the Explosive Removal...  

Federal Register 2010, 2011, 2012, 2013

...Marine Mammals; Taking of Marine Mammals Incidental to the Explosive Removal of Offshore Structures in the Gulf of Mexico AGENCY...Authorization (LOAs) to take marine mammals incidental to the explosive removal of offshore oil and gas structures (EROS) in...

2010-02-26

220

75 FR 28566 - Incidental Taking of Marine Mammals; Taking of Marine Mammals Incidental to the Explosive Removal...  

Federal Register 2010, 2011, 2012, 2013

...Marine Mammals; Taking of Marine Mammals Incidental to the Explosive Removal of Offshore Structures in the Gulf of Mexico AGENCY...Authorization (LOA) to take marine mammals incidental to the explosive removal of offshore oil and gas structures (EROS) in...

2010-05-21

221

75 FR 54851 - Incidental Taking of Marine Mammals; Taking of Marine Mammals Incidental to the Explosive Removal...  

Federal Register 2010, 2011, 2012, 2013

...Marine Mammals; Taking of Marine Mammals Incidental to the Explosive Removal of Offshore Structures in the Gulf of Mexico AGENCY...Authorization (LOA) to take marine mammals incidental to the explosive removal of offshore oil and gas structures (EROS) in...

2010-09-09

222

75 FR 38078 - Incidental Taking of Marine Mammals; Taking of Marine Mammals Incidental to the Explosive Removal...  

Federal Register 2010, 2011, 2012, 2013

...Marine Mammals; Taking of Marine Mammals Incidental to the Explosive Removal of Offshore Structures in the Gulf of Mexico AGENCY...Authorization (LOA) to take marine mammals incidental to the explosive removal of offshore oil and gas structures (EROS) in...

2010-07-01

223

Report on the explosion, fire, and oil spill resulting in one fatality and injury on September 21, 1978, at Well 6 of Cavern 6 at the West Hackberry, Louisiana, oil storage site of the strategic petroleum reserve. Volume I  

SciTech Connect

The following report is the independent product of the Accident Investigation Committee which was commissioned by the Department of Energy following the accident on September 21, 1978, at the Strategic Petroleum Reserve site at West Hackberry, Louisiana. This Committee is charged with the task of determining the nature, extent, and causes of that accident, which resulted in loss of life, injury and property damage, and the need for corrective action. A nonburning oil spill went into nearby Black Lake, but was contained by the deployment of a series of oil spill containment booms and a prevailing wind from the northeast that kept the oil spill in a restricted area near shore. Because of the rapid and effective containment and cleanup of the oil spill by the Rapid Response Team, it appears very likely at this time that Black Lake will not sustain any permanent environmental damage. Cavern 6 initially contained approximately 7,000,000 barrels of oil at a pressure of 650 psig measured at the well head. As of September 29, 1978, the Strategic Petroleum Reserve Office - New Orleans (SPRO) estimated that oil expulsion from Cavern 6 was 67,510 barrels. Of this, 34,620 barrels of oil are accounted for, including 31,200 barrels of oil released into Black Lake and subsequently recovered. The remainder (32,890 barrels) was assumed by SPRO to have been burned. The total loss is presently estimated by the Accident Investigation Committee 's consultant to be $12 million. An assessment of the technical problems present at the time of the accident is given. Recommendations for improved safety procedures are included.

Not Available

1978-11-01

224

Structural Insights into RNA Recognition by RIG-I  

SciTech Connect

Intracellular RIG-I-like receptors (RLRs, including RIG-I, MDA-5, and LGP2) recognize viral RNAs as pathogen-associated molecular patterns (PAMPs) and initiate an antiviral immune response. To understand the molecular basis of this process, we determined the crystal structure of RIG-I in complex with double-stranded RNA (dsRNA). The dsRNA is sheathed within a network of protein domains that include a conserved 'helicase' domain (regions HEL1 and HEL2), a specialized insertion domain (HEL2i), and a C-terminal regulatory domain (CTD). A V-shaped pincer connects HEL2 and the CTD by gripping an {alpha}-helical shaft that extends from HEL1. In this way, the pincer coordinates functions of all the domains and couples RNA binding with ATP hydrolysis. RIG-I falls within the Dicer-RIG-I clade of the superfamily 2 helicases, and this structure reveals complex interplay between motor domains, accessory mechanical domains, and RNA that has implications for understanding the nanomechanical function of this protein family and other ATPases more broadly.

Luo, Dahai; Ding, Steve C.; Vela, Adriana; Kohlway, Andrew; Lindenbach, Brett D.; Pyle, Anna Marie (Yale)

2011-10-27

225

Structural insights into RNA recognition by RIG-I  

PubMed Central

Summary Intracellular RIG-I-like receptors (RLRs, including RIG-I, MDA-5, and LGP-2) recognize viral RNAs as pathogen-associated molecular patterns (PAMPs) and initiate an antiviral immune response. To understand the molecular basis of this process, we determined the crystal structure of RIG-I in complex with double-stranded RNA. The dsRNA is sheathed within a network of protein domains that include a conserved “helicase” domain (regions HEL1 and HEL2), a specialized insertion domain (HEL2i), and a C-terminal regulatory domain (CTD). A V-shaped pincer connects HEL2 and the CTD by gripping an ?-helical shaft that extends from HEL1. In this way, the pincer coordinates functions of all the domains and couples RNA binding with ATP hydrolysis. RIG-I falls within the Dicer-RIG-I clade of super family 2 of helicases and this structure reveals complex interplay between motor domains, accessory mechanical domains and RNA that has implications for understanding the nanomechanical function this protein family and other ATPases more broadly. PMID:22000018

Luo, Dahai; Ding, Steve C.; Vela, Adriana; Kohlway, Andrew; Lindenbach, Brett D.; Pyle, Anna Marie

2011-01-01

226

Advanced jack up rig breaking U.S. construction drought  

SciTech Connect

A new heavy duty jack up, due in mid-1998, will be able to simultaneously drill and produce wells in harsher environments and deeper water than current jack ups in the worldwide fleet. Rowan Cos. Inc.`s Gorilla V is the only mobile offshore drilling unit (MODU) currently under construction in the US. Two more enhanced Gorilla design rigs are planned before the year 2000. The enhanced Gorilla class jack up represents the most technologically advanced jack up unit constructed to date. The rigs are structurally designed to meet year-round weather challenges in the harshest geographical environments. Rising demand for drilling rigs, coupled with a dwindling fleet, is generating supply shortages around the world, particularly at the high-specification end of the market. Even increasing the historical retirement age from 20 to 25 years, rig attrition continues at a level of about 18 rigs per year. Apart from the jack up market per se, however, Rowan`s strategy in designing and building enhanced Gorillas is to improve existing jack up drilling technology and offer the versatility to operate as a drilling unit, a mobile production unit, or both simultaneously in either open water locations or alongside existing platforms. The paper discusses the market for these heavy jack-ups, the use of one on the Cohasset project in Nova Scotia, the Gorilla V and enhanced Gorillas, geographical range of use, and MOPU economics.

Kelly, P. [Rowan Companies Inc., Houston, TX (United States)

1997-03-10

227

Totally confined explosive welding  

NASA Technical Reports Server (NTRS)

The undesirable by-products of explosive welding are confined and the association noise is reduced by the use of a simple enclosure into which the explosive is placed and in which the explosion occurs. An infrangible enclosure is removably attached to one of the members to be bonded at the point directly opposite the bond area. An explosive is completely confined within the enclosure at a point in close proximity to the member to be bonded and a detonating means is attached to the explosive. The balance of the enclosure, not occupied by explosive, is filled with a shaped material which directs the explosive pressure toward the bond area. A detonator adaptor controls the expansion of the enclosure by the explosive force so that the enclosure at no point experiences a discontinuity in expansion which causes rupture. The use of the technique is practical in the restricted area of a space station.

Bement, L. J. (inventor)

1978-01-01

228

Extrusion cast explosive  

DOEpatents

Improved, multiphase, high performance, high energy, extrusion cast explosive compositions, comprising, a crystalline explosive material; an energetic liquid plasticizer; a urethane prepolymer, comprising a blend of polyvinyl formal, and polycaprolactone; a polyfunctional isocyanate; and a catalyst are disclosed. These new explosive compositions exhibit higher explosive content, a smooth detonation front, excellent stability over long periods of storage, and lower sensitivity to mechanical stimulants. 1 fig.

Scribner, K.J.

1985-01-29

229

Extrusion cast explosive  

DOEpatents

Disclosed is an improved, multiphase, high performance, high energy, extrusion cast explosive compositions, comprising, a crystalline explosive material; an energetic liquid plasticizer; a urethane prepolymer, comprising a blend of polyvinyl formal, and polycaprolactone; a polyfunctional isocyanate; and a catalyst. These new explosive compositions exhibit higher explosive content, a smooth detonation front, excellent stability over long periods of storage, and lower sensitivity to mechanical stimulants. 1 fig.

Scribner, K.J.

1985-11-26

230

Inspection tester for explosives  

DOEpatents

An inspection tester that can be used anywhere as a primary screening tool by non-technical personnel to determine whether a surface contains explosives. It includes a body with a sample pad. First and second explosives detecting reagent holders and dispensers are operatively connected to the body and the sample pad. The first and second explosives detecting reagent holders and dispensers are positioned to deliver the explosives detecting reagents to the sample pad. A is heater operatively connected to the sample pad.

Haas, Jeffrey S. (San Ramon, CA); Simpson, Randall L. (Livermore, CA); Satcher, Joe H. (Patterson, CA)

2007-11-13

231

An explosive shock tube  

Microsoft Academic Search

Experiments with a model explosive shock tube are described. Flow of a ; dense air plasma with speed 25-l0 km\\/sec is obtained by means of an explosive gas ; compressor. Photographs of flow over models were taken when the flow behind the ; shock wave becomes opaque. The experiments were conducted in a laboratory ; explosion chamber, (auth);

A. E. Voitenko; M. A. Lyubimova; E. P. Matochkin

1973-01-01

232

High-nitrogen explosives  

Microsoft Academic Search

The syntheses and characterization of various tetrazine and furazan compounds offer a different approach to explosives development. Traditional explosives - such as TNT or RDX - rely on the oxidation of the carbon and hydrogen atoms by the oxygen carrying nitro group to produce the explosive energy. High-nitrogen compounds rely instead on large positive heats of formation for that energy.

D. Naud; M. A. Hiskey; J. F. Kramer; R. L. Bishop; H. H. Harry; S. F. Son; G. K. Sullivan

2002-01-01

233

Explosives with Lined Cavities  

Microsoft Academic Search

Explosives detonated in contact with thick steel plates produce much deeper holes in the steel when there is a cavity in the explosive in contact with the plate. While this phenomenon has been known for more than 150 years, the enormous increase in penetrating power that can be produced by lining the explosive cavity with thin metal has been discovered

Garrett Birkhoff; Duncan P. MacDougall; Emerson M. Pugh; Geoffrey Taylor

1948-01-01

234

Plastic explosives Mike Hopkins  

E-print Network

Plastic explosives Mike Hill Mike Hopkins Doug Ravenel What this talk is about The poster The HHRH The reduced E4 -term 1.1 Plastic explosives: A C4 analog of the Kervaire invariant calculation Conference of Virginia Mike Hopkins Harvard University Doug Ravenel University of Rochester #12;Plastic explosives Mike

Ravenel, Douglas

235

Lumped parameter identification of a quarter car test rig  

NASA Astrophysics Data System (ADS)

Quarter car model is a simple and widely used mathematical model to analyze the vibration and control problem of vehicles. In this study, a quarter car test rig is modeled as a lumped parameter system. Model parameters of the system are determined by measurements and experiments. Forced vibration method is used to identify the stiffness and damping parameters of the lumped model. A modal shaker is used to generate the road input in the test rig. The accelerations of the road input, sprung and unsprung masses are measured by piezoelectric accelerometers. The frequency response functions are obtained by using acceleration data. The identified parameters of the test rig are adjusted by comparing the experimental and simulation results.

Taskin, Y.; Yagiz, N.; Yuksek, I.

2013-02-01

236

Energy efficient engine: High pressure turbine uncooled rig technology report  

NASA Technical Reports Server (NTRS)

Results obtained from testing five performance builds (three vane cascades and two rotating rigs of the Energy Efficient Engine uncooled rig have established the uncooled aerodynamic efficiency of the high-pressure turbine at 91.1 percent. This efficiency level was attained by increasing the rim speed and annulus area (AN(2)), and by increasing the turbine reaction level. The increase in AN(2) resulted in a performance improvement of 1.15 percent. At the design point pressure ratio, the increased reaction level rig demonstrated an efficiency of 91.1 percent. The results of this program have verified the aerodynamic design assumptions established for the Energy Efficient Engine high-pressure turbine component.

Gardner, W. B.

1979-01-01

237

Study of Simulation Method of Time Evolution in Rigged QED  

E-print Network

We discuss how we formulate time evolution of physical quantities in the framework of the Rigged QED (Quantum Electrodynamics). The Rigged QED is a theory which has been proposed to treat dynamics of electrons, photons and atomic nuclei in atomic and molecular systems in a quantum field theoretic way. To solve the dynamics in the Rigged QED, we need different techniques from those developed for the conventional QED. As a first step toward this issue, we propose a procedure to expand the Dirac field operator, which represents electrons, by the electron annihilation/creation operators and solutions of the Dirac equation for electrons in nuclear potential. Similarly, the Schrodinger field operators, which represent atomic nuclei, are expanded by nucleus annihilation/creation operators. Then we derive time evolution equations for these annihilation and creation operators and discuss how time evolution of the operators for physical quantities can be calculated. In the end, we propose a method to approximate the ev...

Ichikawa, Kazuhide; Tachibana, Akitomo

2012-01-01

238

Method for forming an in-situ oil shale retort in differing grades of oil shale  

SciTech Connect

An in-situ oil shale retort is formed in a subterranean formation containing oil shale. The formation comprises at least one region of relatively richer oil shale and another region of relatively leaner oil shale. According to one embodiment, formation is excavated from within a retort site for forming at least one void extending horizontally across the retort site, leaving a portion of unfragmented formation including the regions of richer and leaner oil shale adjacent such a void space. A first array of vertical blast holes are drilled in the regions of richer and leaner oil shale, and a second array of blast holes are drilled at least in the region of richer oil shale. Explosive charges are placed in portions of the blast holes in the first and second arrays which extend into the richer oil shale, and separate explosive charges are placed in portions of the blast holes in the first array which extend into the leaner oil shale. This provides an array with a smaller scaled depth of burial (sdob) and closer spacing distance between explosive charges in the richer oil shale than the sdob and spacing distance of the array of explosive charges in the leaner oil shale. The explosive charges are detonated for explosively expanding the regions of richer and leaner oil shale toward the horizontal void for forming a fragmented mass of particles. Upon detonation of the explosive, greater explosive energy is provided collectively by the explosive charges in the richer oil shale, compared with the explosive energy produced by the explosive charges in the leaner oil shale, resulting in comparable fragmentation in both grades of oil shale.

Ricketts, T.E.

1984-04-24

239

A Brief Introduction to Ocean Oil Spills Professor Tommy Dickey, Secretary of the Navy/Chief of Naval Operations  

E-print Network

A Brief Introduction to Ocean Oil Spills Professor Tommy Dickey, Secretary of the Navy by BP Photo provided by BP NASA Terra image #12;What are Causes of Ocean Oil Spills? * Oil drilling rig to date at 10-11 million bbls Interestingly, major oil spills contribute only 5% to total oil input

Fabrikant, Sara Irina

240

The Arrow of Time in Rigged Hilbert Space Quantum Mechanics  

E-print Network

Arno Bohm and Ilya Prigogine's Brussels-Austin Group have been working on the quantum mechanical arrow of time and irreversibility in rigged Hilbert space quantum mechanics. A crucial notion in Bohm's approach is the so-called preparation/registration arrow. An analysis of this arrow and its role in Bohm's theory of scattering is given. Similarly, the Brussels-Austin Group uses an excitation/de-excitation arrow for ordering events, which is also analyzed. The relationship between the two approaches is initially discussed focusing on their semi-group operators and time arrows. Finally a possible realist interpretation of the rigged Hilbert space formulation of quantum mechanics is considered.

Robert C. Bishop

2005-06-22

241

About Hercules Offshore Headquartered in Houston, Texas, Hercules Offshore serves the oil and  

E-print Network

industry with the largest fleet of mobile drilling platforms in the U.S. Gulf of Mexico, and the fourth largest in the world. The company's jackup rigs, liftboats and inland barges are used for oil and gas inland barges. Operating in water ranging from ten to 350 feet deep, jackup rigs are huge, mobile, self

Fisher, Kathleen

242

A design for a flexible, low-cost rigging block for black-box theaters by Michael J. Shields.  

E-print Network

Theater rigging greatly expands both scenic movement and storage options when putting on a production. Small, black-box theaters are often built without rigging equipment in them. Temporary rigging equipment can greatly ...

Shields, Michael J., S.B. Massachusetts Institute of Technology

2010-01-01

243

75 FR 52033 - Rigging Equipment for Material Handling; Extension of the Office of Management and Budget's (OMB...  

Federal Register 2010, 2011, 2012, 2013

...Administration [Docket No. OSHA-2010-0038] Rigging Equipment for Material Handling; Extension...iii) and (f)(2) of the Standard on Rigging Equipment for Material Handling (29 CFR...affixing identification tags or markings on rigging equipment, developing and...

2010-08-24

244

78 FR 70326 - Rigging Equipment for Material Handling; Extension of the Office of Management and Budget's (OMB...  

Federal Register 2010, 2011, 2012, 2013

...Administration [Docket No. OSHA-2010-0038] Rigging Equipment for Material Handling; Extension...iii) and (f)(2) of the Standard on Rigging Equipment for Material Handling (29 CFR...affixing identification tags or markings on rigging equipment, developing and...

2013-11-25

245

Theory and Applications of Categories, Vol. 20, No. 14, 2008, pp. 497-503. CORE VARIETIES, EXTENSIVITY, AND RIG GEOMETRY  

E-print Network

VARIETIES, EXTENSIVITY, AND RIG GEOMETRY F. WILLIAM LAWVERE as the extended algebraic geometry over rigs, depend partly on varieties* * (Birkhoffian inclusions of affine spaces is extensive. Even within the category of* * those rigs where 1+1 = 1, not only

Chapman, Robin

246

Hoisting and Rigging: Purchasing Procedure URL: http://www-group.slac.stanford.edu/esh/eshmanual/references/hoistingProcedPurchase.pdf  

E-print Network

Hoisting and Rigging: Purchasing Procedure URL: http://www-group.slac Department: Field Safety and Building Inspection Office Program: Hoisting and Rigging Authority: ESH Manual, Chapter 41, "Hoisting and Rigging" Date Effective: 15 September 2009 1 Purpose The purpose

Wechsler, Risa H.

247

Explosion proofing the ``explosion proof`` vacuum cleaner  

SciTech Connect

Because of the low humidity environments required in the fabrication of nuclear explosives, assembly technicians can be charged to tens of kilovolts while operating, for example, compressed air, venturi-type, `explosion proof` vacuum cleaners. Nuclear explosives must be isolated from all sources of, and return paths for, AC power and from any part of the lightning protection system. This requirement precludes the use of static ground conductors to drain any charge accumulations. Accordingly, an experimental study of the basic charging mechanisms associated with vacuum operations were identified, the charge generation efficacies of various commercial cleaners were established, and a simple method for neutralizing the charge was devised.

Jones, R.D.; Chen, K.C.; Holmes, S.W.

1995-07-01

248

Dispersants as used in response to the MC252-spill lead to higher mobility of polycyclic aromatic hydrocarbons in oil-contaminated Gulf of Mexico sand.  

PubMed

After the explosion of the Deepwater Horizon oil rig, large volumes of crude oil were washed onto and embedded in the sandy beaches and sublittoral sands of the Northern Gulf of Mexico. Some of this oil was mechanically or chemically dispersed before reaching the shore. With a set of laboratory-column experiments we show that the addition of chemical dispersants (Corexit 9500A) increases the mobility of polycyclic aromatic hydrocarbons (PAHs) in saturated permeable sediments by up to two orders of magnitude. Distribution and concentrations of PAHs, measured in the solid phase and effluent water of the columns using GC/MS, revealed that the mobility of the PAHs depended on their hydrophobicity and was species specific also in the presence of dispersant. Deepest penetration was observed for acenaphthylene and phenanthrene. Flushing of the columns with seawater after percolation of the oiled water resulted in enhanced movement by remobilization of retained PAHs. An in-situ benthic chamber experiment demonstrated that aromatic hydrocarbons are transported into permeable sublittoral sediment, emphasizing the relevance of our laboratory column experiments in natural settings. We conclude that the addition of dispersants permits crude oil components to penetrate faster and deeper into permeable saturated sands, where anaerobic conditions may slow degradation of these compounds, thus extending the persistence of potentially harmful PAHs in the marine environment. Application of dispersants in nearshore oil spills should take into account enhanced penetration depths into saturated sands as this may entail potential threats to the groundwater. PMID:23209777

Zuijdgeest, Alissa; Huettel, Markus

2012-01-01

249

Workshop on explosions, BLEVEs, fires, etc.  

SciTech Connect

The purpose of this workshop will be to provide a bridge between engineering practices, modeling, and measurement of fires and explosions, and use this information in a practical manner to improve the fire safety of the process facility. New techniques and information are available on the means to prevent, predict and mitigate fires and explosions. A review of BLEVEs and methods for preventing and protecting against the effects of BLEVES in large petrochemical facilities. Observations and the use of models that have been successful in predicting the effects of vapor explosions for the prevention of collapse of structures and mitigation of the effects of vapor explosions in process facilities are presented. Recent work involving the measurement of radiation from large jet fires at the Kuwaiti oil fields and fire tests of crude oil spills on the sea is discussed. Fire radiation measurement can be used to predict effects on structures, facilities, and the complexity of fire fighting operations required for control of spill and pool fires. Practical applications of techniques for prevention and control of explosions within building, resulting from failures of autoclaves or release of flammable gas to the atmosphere of the building are discussed.

NONE

1995-12-31

250

Click to insert the image of the facility or test-rig  

E-print Network

Click to insert the image of the facility or test-rig Application area Facility Mechanical Property documenting this method (Dimensions of rooms, size of the Ă? test-rig, working frequency range...) Various

Berlin,Technische Universität

251

Vehicle Trajectory from an Uncalibrated Stereo-Rig with Super-Homography  

E-print Network

Vehicle Trajectory from an Uncalibrated Stereo-Rig with Super-Homography Nicolas SIMOND, Claude in extracting then tracking features (points, lines) with an uncalibrated stereo-rig from the road assumed

Paris-Sud XI, Université de

252

Analytical and experimental investigations of a labyrinth seal test rig and damper seals for turbomachinery  

E-print Network

rig is described. The test rig is used to evaluate the direct damping characteristics of conventional two bladed, teeth on stator labyrinth seals with converging and diverging clearances. Pertinence of data from non rotating tests used for rotating...

Shultz, Richard Raymond

2012-06-07

253

Explosives Development and Fundamentals of Explosives Technology  

Microsoft Academic Search

\\u000a This introductory chapter is intended to give a brief outline of the history of the development of some common explosives\\u000a and point the reader toward more weighty texts where full details of each of the points made and many more may be found. It\\u000a also seeks to provide an introduction to some of the fundamentals of explosives technology, acting as

Peter R. Lee

254

HIL simulation of WSP systems on MI6 test rig  

Microsoft Academic Search

In this article, a multi-purpose platform for Hardware In the Loop (HIL) testing of safety relevant railway subsystems, such as odometry boards or wheel slide protection systems, is shown. The rig, called MI-6, is a product of the cooperation of Trenitalia with researchers of Dip. Energetica Sergio Stecco (University of Florence). In this work, special attention has been paid to

L. Pugi; M. Malvezzi; A. Tarasconi; A. Palazzolo; G. Cocci; M. Violani

2006-01-01

255

A Hydrodynamic Journal Bearing Test Rig with Dynamic Measurement Capabilities  

Microsoft Academic Search

A bearing lest rig was developed to characterize the static and dynamic properties of hydrodynamic journal bearings. Static measurement capabilities include operating eccentricity, pressure and thermal boundary conditions, and continuous circumferential pressure and film thickness profiles at multiple axial planes. Dynamic stiffness and damping coefficient measurements are achieved using steady state harmonic excitations generated by a two-axis shaker system. All

Ronald D. Flack; Gregory J. Kostrzewsky; David V. Taylor

1993-01-01

256

Hoisting, rigging, and transporting of items for nuclear power plants  

SciTech Connect

This standard provides requirements and guidelines for the design, manufacture, acceptance, testing, and use of hoisting, rigging, and transporting equipment to maintain the quality of safety-related nuclear power plant items which require special handling from the time these safety-related items are delivered to the point of receipt for the plant until the operating phase of the plant.

Not Available

1981-01-01

257

Relationships Between Two Approaches: Rigged Configurations and 10-Eliminations  

E-print Network

There are two distinct approaches to the study of initial value problem of the periodic box-ball systems. One way is the rigged configuration approach due to Kuniba--Takagi--Takenouchi and another way is the 10-elimination approach due to Mada--Idzumi--Tokihiro. In this paper, we describe precisely interrelations between these two approaches.

Kirillov, Anatol N

2009-01-01

258

Hoisting and rigging of critical components and related equipment. Revision  

SciTech Connect

This standard covers hoisting and rigging of critical items (3.2) and of materials, components, or supplies handled over, in, or around spaces in which critical items are located. The purpose of this standard is to provide requirements and rules that will minimize the likelihood of physical damage to critical items due to dropping, upset, impact, or other handling accident.

Not Available

1985-12-13

259

Bid Rigging and the Threat of Government Prosecution  

Microsoft Academic Search

In this article, I develop a simple bidding model in which collusion is endogenous. Buyers at a first-price sealed-bid auction decide whether to rig their bids given that they face the threat of government prosecution. A legal authority chooses whether to investigate the buyers on the basis of the bids tendered. In the unique sequential equilibrium of the game, buyers

Chantale LaCasse

1995-01-01

260

Relationships Between Two Approaches: Rigged Configurations and 10-Eliminations  

E-print Network

There are two distinct approaches to the study of initial value problem of the periodic box-ball systems. One way is the rigged configuration approach due to Kuniba--Takagi--Takenouchi and another way is the 10-elimination approach due to Mada--Idzumi--Tokihiro. In this paper, we describe precisely interrelations between these two approaches.

Anatol N. Kirillov; Reiho Sakamoto

2009-02-13

261

Automatic rigging and animation of 3D characters  

Microsoft Academic Search

Animating an articulated 3D character currently requires manual rigging to specify its internal skeletal structure and to define how the input motion deforms its surface. We present a method for ani- mating characters automatically. Given a static character mesh and a generic skeleton, our method adapts the skeleton to the character and attaches it to the surface, allowing skeletal motion

Ilya Baran; Jovan Popovic

2007-01-01

262

Hoisting and Rigging: Visual Structural Weld Inspection Criteria and Form  

E-print Network

Weld profiles must be in conformance with AWS D1.1 Section 5.24 X X X Inspection timing VisualHoisting and Rigging: Visual Structural Weld Inspection Criteria and Form Department: Field Safety ­ specify Carbon steel: specifications, if known All others: alloy, if known Weld filler alloy, if known Yes

Wechsler, Risa H.

263

Estimating Sensor Pose from Images of a Stereo Rig  

Microsoft Academic Search

In this paper we investigate the estimation of pose of images provided by a rigid stereo rig on a mobile mapping system called STERE- OPOLIS developped at IGN in the ARCHI project of the MATIS laboratory. In this system the terrestrial photographies are a georef- erencing device. We use the images as a verticality measurement device by finding the vertical

Nicolas Paparoditis; Marc Pierrot-Deseilligny; Radu Horaud

264

New wave drilling rigs offer automation, ergonomics and economy  

Microsoft Academic Search

The drilling industry is being pressured to do its job not just faster and cheaper, but also safer and cleaner. The latest land and offshore platform drilling rig designs incorporate modularization, mechanization, computers and environmental protection in an attempt to meet those demands. This paper reviews the technology of these new designs and how they can operate to ensure safety

Von Flatern

1996-01-01

265

New Mix Explosives for Explosive Welding  

NASA Astrophysics Data System (ADS)

Suggested and tested were some mix explosives---powder mixtures of a brisant high explosive (HE = RDX, PETN) and an inert diluent (baking soda)---for use in explosive welding. RDX and PETN were selected in view of their high throwing ability and low critical diameter. Since the decomposition of baking soda yields a huge amount of gaseous products, its presence ensures (even at a low HE percentage) a throwing speed that is sufficient for realization of explosive welding, at a reduced brisant action of charge. Mix chargers containing 30--70 wt % HE (the rest baking soda) have been tested experimentally and optimized. For study of possibility to reduce critical diameter of HE mixture, the mixture was prepared where HE crystal sizes did not exceed 10 ?m. The tests, which were performed with this HE, revealed that the mixture detonated stably with the velocity D 2 km/s, if the layer thickness was d = 2mm. The above explosives afford to markedly diminish deformations within the oblique impact zone and thus to carry out explosive welding of hollow items and thin metallic foils.

Andreevskikh, Leonid

2011-06-01

266

Explosive plane-wave lens  

SciTech Connect

An explosive wave lens is described comprising: a. a donor explosive; b. detonator means for generating a detonation wave in the donor explosive; c. an acceptor explosive; d. impactor means for receiving the detonation wave and for striking the acceptor explosive to produce a second detonation wave having a predetermined form in the acceptor explosive; and e. spacer means for spacing the impactor means apart from the acceptor explosive.

Marsh, S.P.

1988-03-08

267

Rigid and Articulated Motion Seen with an Uncalibrated Stereo Rig Andreas Ruf  

E-print Network

Rigid and Articulated Motion Seen with an Uncalibrated Stereo Rig Andreas Ruf Radu Horaud Andreas an uncalibrated stereo rig to be used as a faithful motion capturing device. We intro- duce an original camera pair - a stereo rig. It is well-known that such a camera pair can recover the 3D projective

Paris-Sud XI, Université de

268

Resonances of Dynamical Systems and Fredholm-Riesz Operators on Rigged  

E-print Network

Resonances of Dynamical Systems and Fredholm-Riesz Operators on Rigged is a Fredholm-Riesz operator on a rigged Hilbert space. After a discussion of spectral theory in locally'enyi map. Keywords: Resonances, chaotic maps, Fredholm-Riesz operators, rigged Hilbert spaces

Bandtlow, Oscar

269

Evolution of MDA-5/RIG-I-dependent innate immunity: Independent evolution by domain grafting  

E-print Network

Evolution of MDA-5/RIG-I-dependent innate immunity: Independent evolution by domain grafting acid inducible gene-I (RIG-I) as primary sensors of RNA viruses for type I interferon induction- genetic origin of MDA-5 and RIG-I domain arrangement (CARD1- CARD2-helicase-DEAD/DEAH) indicates

DeSalle, Rob

270

Rigged Hilbert Space Treatment of Continuous Spectrum R. de la Madrid  

E-print Network

Rigged Hilbert Space Treatment of Continuous Spectrum R. de la Madrid Institute for Scienti#12;c) Abstract The ability of the Rigged Hilbert Space formalism to deal with continuous spectrum is demonstrated of the Hilbert space. We construct the position and energy representations of the Rigged Hilbert Space generated

271

Resonances of Dynamical Systems and Fredholm-Riesz Operators on Rigged  

E-print Network

Resonances of Dynamical Systems and Fredholm-Riesz Operators on Rigged Hilbert Spaces O. F is a Fredholm-Riesz operator on a rigged Hilbert space. After a discussion of spectral theory in locally convex. Keywords: Resonances, chaotic maps, Fredholm-Riesz operators, rigged Hilbert spaces 1 #12; 1 Introduction

Bandtlow, Oscar

272

AN AUTOMATED RIGGING SYSTEM FOR FACIAL Presented to the Faculty of the Graduate School  

E-print Network

AN AUTOMATED RIGGING SYSTEM FOR FACIAL ANIMATION A Thesis Presented to the Faculty of the Graduate present a system for the automated rigging of human face models, provid- ing a significant time savings. We parameterize the construction of the reference rig on the surface topol- ogy of the reference

Toronto, University of

273

The rigged Hilbert space of the algebra of the onedimensional rectangular barrier potential  

E-print Network

The rigged Hilbert space of the algebra of the one­dimensional rectangular barrier potential Rafael­48080 Bilbao, Spain E­mail: wtbdemor@lg.ehu.es URL: http://www.ehu.es/#wtbdemor Abstract. The rigged­dimensional rectangular potential provides another opportunity to show that the rigged Hilbert space fully accounts

274

Department of Mechanical Engineering Spring 2012 LNG Test Rig Movable LSD Vanes  

E-print Network

PENNSTATE Department of Mechanical Engineering Spring 2012 LNG Test Rig Movable LSD Vanes Overview test rigs to find the optimized angle and use it in the centrifugal compressors they produce, removing the need to take the test rig apart. Objectives The objective of the project is to design

Demirel, Melik C.

275

AIRDROP OF SUPPLIES AND EQUIPMENT: RIGGING 950B SCOOP-LOADER  

E-print Network

AIRDROP OF SUPPLIES AND EQUIPMENT: RIGGING 950B SCOOP-LOADER DEPARTMENT OF THE ARMY DEPARTMENTOF, DC,27 October 1997 AIRDROP OF SUPPLIES AND EQUIPMENT RIGGING 950B SCOOP-LOADER This change adds the procedures for rigging the scoop-loader with a 7-foot forklift attachment. FM 10-574/TO 13C7-31-31, 2 May

US Army Corps of Engineers

276

A spectral theory of linear operators on rigged Hilbert spaces under certain analyticity  

E-print Network

A spectral theory of linear operators on rigged Hilbert spaces under certain analyticity conditions, 2011; last modified Aug 20, 2011 Abstract A spectral theory of linear operators on rigged Hilbert, as an X -valued holomorphic function, where X is a dual space of X. The rigged Hilbert space consists

277

Closed-form solutions for the Euclidean calibration of a stereo rig  

E-print Network

Closed-form solutions for the Euclidean calibration of a stereo rig G. Csurka, D. Demirdjian, A. It is therefore important to be able to re-calibrate the stereo rig over time and over a small number of motions of a stereo rig. For general motions, a ne structure can be estimated from the eigenvector of a 3-D

Paris-Sud XI, Université de

278

QUASISYMMETRIC SEWING IN RIGGED TEICHMULLER SPACE DAVID RADNELL AND ERIC SCHIPPERS  

E-print Network

QUASISYMMETRIC SEWING IN RIGGED TEICHM¨ULLER SPACE DAVID RADNELL AND ERIC SCHIPPERS Abstract. One whose n boundaries are "rigged" with analytic parametrizations. The fundamental operation is the sewing of these moduli spaces as the "rigged Riemann moduli space". By generalizing to quasisymmetric boundary

Radnell, David

279

Rigged Hilbert Space Approach to the Schrodinger Equation R. de la Madrid  

E-print Network

Rigged Hilbert Space Approach to the Schrodinger Equation R. de la Madrid Institute for Scienti#12odinger equation whose spectrum has a continuous part is the Rigged Hilbert Space rather than just the Hilbert an appropriate Rigged Hilbert Space (RHS). The RHS is able to associate an eigenket to each energy

280

The role of the rigged Hilbert space in Quantum Rafael de la Madrid  

E-print Network

The role of the rigged Hilbert space in Quantum Mechanics Rafael de la Madrid Departamento de F setting for Quantum Mechanics is the rigged Hilbert space rather than just the Hilbert space. In particular, Dirac's bra­ket formalism is fully implemented by the rigged Hilbert space rather than just

281

To appear in the ACM SIGGRAPH conference proceedings Automatic Rigging and Animation of 3D Characters  

E-print Network

To appear in the ACM SIGGRAPH conference proceedings Automatic Rigging and Animation of 3D Institute of Technology Abstract Animating an articulated 3D character currently requires manual rigging under a minute to rig a character on a modern midrange PC. CR Categories: I.3.7 [Computer Graphics

Popovic, Jovan

282

THE SEMIGROUP OF RIGGED ANNULI AND THE TEICHM ULLER SPACE OF THE ANNULUS  

E-print Network

THE SEMIGROUP OF RIGGED ANNULI AND THE TEICHM ¨ULLER SPACE OF THE ANNULUS DAVID RADNELL AND ERIC parametrizations. From here on we will refer to an element of this semigroup as a rigged annulus, where the term "rigging" refers to the boundary parametrizations. It is customary in conformal field theory (as defined

Schippers, Eric

283

RING COMPLETION OF RIG CATEGORIES NILS A. BAAS, BJRN IAN DUNDAS, BIRGIT RICHTER AND JOHN ROGNES  

E-print Network

RING COMPLETION OF RIG CATEGORIES NILS A. BAAS, BJĂ?RN IAN DUNDAS, BIRGIT RICHTER AND JOHN ROGNES Abstract. We offer a solution to the long-standing problem of group completing within the context of rig categories (also known as bimonoidal categories). Given a rig category R we construct a natural additive

Richter, Birgit

284

A spectral theory of linear operators on rigged Hilbert spaces under certain analyticity  

E-print Network

A spectral theory of linear operators on rigged Hilbert spaces under certain analyticity conditions on a rigged Hilbert space is applied to Schr¨odinger operators with exponentially decaying potentials and dilation analytic potentials. The theory of rigged Hilbert spaces provides a unified approach to resonances

285

Department of Mechanical Engineering Fall 2009 Air Products-Entrained Particle Flow Test Rig  

E-print Network

Rig Construction and Operation Overview Combustion flue gas is often treated using selective catalyst are causing catalyst plugging. Objectives Air Products requested that a test rig be constructed to entrain to fulfil for our customer, Air Products. Each team member developed a concept for a test rig design

Demirel, Melik C.

286

Safety First Safety Last Safety Always Inspect rigging equipment for material handling before use  

E-print Network

Safety First Safety Last Safety Always Inspect rigging equipment for material handling before use on each shift and as necessary during its use to ensure that it is safe. Remove defective rigging equipment from service. Do not load rigging equipment in excess of its recommended safe working load. When

Minnesota, University of

287

RING COMPLETION OF RIG CATEGORIES NILS A. BAAS, BJRN IAN DUNDAS, BIRGIT RICHTER AND JOHN ROGNES  

E-print Network

RING COMPLETION OF RIG CATEGORIES NILS A. BAAS, BJ�RN IAN DUNDAS, BIRGIT RICHTER AND JOHN ROGNES Abstract. We o#er a solution to the long­standing problem of group completing within the context of rig categories (also known as bimonoidal categories). Given a rig category R we construct a natural additive

Rognes, John

288

Metric Calibration of a Stereo Rig Andrew Zisserman, Paul A Beardsley and Ian D Reid  

E-print Network

Metric Calibration of a Stereo Rig Andrew Zisserman, Paul A Beardsley and Ian D Reid Robotics describe a method to determine affine and metric calibration for a stereo rig. The method does not involve the use of calibration objects or special motions, but simply a single general motion of the rig

Zisserman, Andrew

289

Saving money on rig refurbishments through foreign trade zones or duty-drawback  

Microsoft Academic Search

The recent boom in day rates for rigs capable of drilling in deep water and harsh environments has created a frenzy of rig refurbishment activity in shipyards located in US Gulf states. In most instances, the destination for the rigs upon completion is the US Outer Continental Shelf (USOCS) in the Gulf of Mexico. The problem faced by contractors\\/operators planning

R. J. Jr

1997-01-01

290

Rigged Hilbert space of the free coherent states and p-adic numbers  

E-print Network

Rigged Hilbert space of the free coherent states is investigated. We prove that this rigged Hilbert space is isomorphous to the space of generalized functions on p-adic disk. We discuss the relation of the described isomorphism of rigged Hilbert spaces and noncommutative geometry and show, that the considered example realises the isomorphism of the noncommutative line and p-adic disk.

S. V. Kozyrev

2002-05-07

291

Combustion of Coal/Oil/Water Slurries  

NASA Technical Reports Server (NTRS)

Proposed test setup would measure combustion performance of new fuels by rapidly heating a droplet of coal/oil/water mixture and recording resulting explosion. Such mixtures are being considered as petroleum substitutes in oil-fired furnaces.

Kushida, R. O.

1982-01-01

292

The Scaled Thermal Explosion Experiment  

Microsoft Academic Search

We have developed the Scaled Thermal Explosion Experiment (STEX) to provide a database of reaction violence from thermal explosion for explosives of interest. Such data are needed to develop, calibrate, and validate predictive capability for thermal explosions using simulation computer codes. A cylinder of explosive 25, 50 or 100 mm in diameter, is confined in a steel cylinder with heavy

J. F. Wardell; J. L. Maienschein

2002-01-01

293

Detonation in Liquid Explosives  

Microsoft Academic Search

DURING the War a general investigation was commenced at the Road Research Laboratory, on the initiative of Dr. A. H. Davis, into the process of detonation in explosives, the programme including a photographic study of the detonation Waves in transparent liquid explosives-the sensitivity of some of which can be varied by adjusting the constitution-and their relation to primers of different

D. Croney

1948-01-01

294

Inside an Explosion  

NSDL National Science Digital Library

From afar, an explosion may seem like one of the most incredible examples of chaotic interaction. But once you look closer, as in this video from QUEST, you will find that large-scale explosions require very precise interactions to occur in just the right sequence.

Kqed

2009-10-30

295

Idaho Explosives Detection System  

Microsoft Academic Search

The Idaho Explosives Detection System was developed at the Idaho National Laboratory (INL) to respond to threats imposed by delivery trucks potentially carrying explosives into military bases. A full-scale prototype system has been built and is currently undergoing testing. The system consists of two racks, one on each side of a subject vehicle. Each rack includes a neutron generator and

Edward L. Reber; Larry G. Blackwood; Andrew J. Edwards; J. Keith Jewell; Kenneth W. Rohde; Edward H. Seabury; Jeffery B. Klinger

2005-01-01

296

An explosion in Tunguska  

Microsoft Academic Search

A detailed History of exploration of the place at Podkamennaya Tunguska, where a well known explosion has occured on 30 June 1908 is given with emphasys on the role by Leonid Kulik (1928-29). A short biography of Leonid Kulik is given. A review of subsequent expeditions is given. A review of existing theories concerning the explosion at Podkamennaya Tunguska on

Ioan Nistor

2008-01-01

297

Coal dust explosibility  

Microsoft Academic Search

This paper reports US Bureau of Mines (USBM) research on the explosibility of coal dusts. The purpose of this work is to improve safety in mining and other industries that process or use coal. Most of the tests were conducted in the USBM 20 litre laboratory explosibility chamber. The laboratory data show relatively good agreement with those from full-scale experimental

Kenneth L. Cashdollar

1996-01-01

298

Demonstration of laser speckle system on burner liner cyclic rig  

NASA Technical Reports Server (NTRS)

A demonstration test was conducted to apply speckle photogrammetry to the measurement of strains on a sample of combustor liner material in a cyclic fatigue rig. A system for recording specklegrams was assembled and shipped to the NASA Lewis Research Center, where it was set up and operated during rig tests. Data in the form of recorded specklegrams were sent back to United Technologies Research Center for processing to extract strains. Difficulties were found in the form of warping and bowing of the sample during the tests which degraded the data. Steps were taken by NASA personnel to correct this problem and further tests were run. Final data processing indicated erratic patterns of strain on the burner liner sample.

Stetson, K. A.

1986-01-01

299

High-Flow Jet Exit Rig Designed and Fabricated  

NASA Technical Reports Server (NTRS)

The High-Flow Jet Exit Rig at the NASA Glenn Research Center is designed to test single flow jet nozzles and to measure the appropriate thrust and noise levels. The rig has been designed for the maximum hot condition of 16 lbm/sec of combustion air at 1960 R (maximum) and to produce a maximum thrust of 2000 lb. It was designed for cold flow of 29.1 lbm/sec of air at 530 R. In addition, it can test dual-flow nozzles (nozzles with bypass flow in addition to core flow) with independent control of each flow. The High- Flow Jet Exit Rig was successfully fabricated in late 2001 and is being readied for checkout tests. The rig will be installed in Glenn's Aeroacoustic Propulsion Laboratory. The High-Flow Jet Exit Rig consists of the following major components: a single component force balance, the natural-gas-fueled J-79 combustor assembly, the plenum and manifold assembly, an acoustic/instrumentation/seeding (A/I/S) section, a table, and the research nozzles. The rig will be unique in that it is designed to operate uncooled. The structure survives the 1960 R test condition because it uses carefully selected high temperature alloy materials such as Hastelloy-X. The lower plenum assembly was designed to operate at pressures to 450 psig at 1960 R, in accordance with the ASME B31.3 piping code. The natural gas-fueled combustor fires directly into the lower manifold. The hot air is directed through eight 1-1/2-in. supply pipes that supply the upper plenum. The flow is conditioned in the upper plenum prior to flowing to the research nozzle. The 1-1/2-in. supply lines are arranged in a U-shaped design to provide for a flexible piping system. The combustor assembly checkout was successfully conducted in Glenn's Engine Component Research Laboratory in the spring of 2001. The combustor is a low-smoke version of the J79 combustor used to power the F4 Phantom military aircraft. The natural gas-fueled combustor demonstrated high-efficiency combustion over a wide range of operating conditions. This wide operating envelope is required to support the testing of both single- and dual-flow nozzles. Key research goals include providing simultaneous, highly accurate acoustic, flow, and thrust measurements on jet nozzle models in realistic flight conditions, as well as providing scaleable acoustic results. The High-Flow Jet Exit Rig is a second-generation high-flow test rig. Improvements include cleaner flow with reduced levels of particulate, soot, and odor. Choked-flow metering is required with plus or minus 0.25-percent accuracy. Thrust measurements from 0 to 2000 lbf are required with plus or minus 0.25-percent accuracy. Improved acoustics will be achieved by minimizing noise through large pipe bend radii, lower internal flow velocities, and microdrilled choke plates with thousands of 0.040-in.- diameter holes.

Buehrle, Robert J.; Trimarchi, Paul A.

2003-01-01

300

Energy efficient engine sector combustor rig test program  

NASA Technical Reports Server (NTRS)

Under the NASA-sponsored Energy Efficient Engine program, Pratt & Whitney Aircraft has successfully completed a comprehensive combustor rig test using a 90-degree sector of an advanced two-stage combustor with a segmented liner. Initial testing utilized a combustor with a conventional louvered liner and demonstrated that the Energy Efficient Engine two-stage combustor configuration is a viable system for controlling exhaust emissions, with the capability to meet all aerothermal performance goals. Goals for both carbon monoxide and unburned hydrocarbons were surpassed and the goal for oxides of nitrogen was closely approached. In another series of tests, an advanced segmented liner configuration with a unique counter-parallel FINWALL cooling system was evaluated at engine sea level takeoff pressure and temperature levels. These tests verified the structural integrity of this liner design. Overall, the results from the program have provided a high level of confidence to proceed with the scheduled Combustor Component Rig Test Program.

Dubiel, D. J.; Greene, W.; Sundt, C. V.; Tanrikut, S.; Zeisser, M. H.

1981-01-01

301

Non-detonable explosive simulators  

DOEpatents

A simulator which is chemically equivalent to an explosive, but is not detonable. The simulator has particular use in the training of explosives detecting dogs and calibrating sensitive analytical instruments. The explosive simulants may be fabricated by different techniques, a first involves the use of standard slurry coatings to produce a material with a very high binder to explosive ratio without masking the explosive vapor, and the second involves coating inert beads with thin layers of explosive molecules. 5 figs.

Simpson, R.L.; Pruneda, C.O.

1994-11-01

302

Non-detonable explosive simulators  

DOEpatents

A simulator which is chemically equivalent to an explosive, but is not detonable. The simulator has particular use in the training of explosives detecting dogs and calibrating sensitive analytical instruments. The explosive simulants may be fabricated by different techniques, a first involves the use of standard slurry coatings to produce a material with a very high binder to explosive ratio without masking the explosive vapor, and the second involves coating inert beads with thin layers of explosive molecules.

Simpson, Randall L. (Livermore, CA); Pruneda, Cesar O. (Livermore, CA)

1994-01-01

303

76 FR 12070 - Incidental Taking of Marine Mammals; Taking of Marine Mammals Incidental to the Explosive Removal...  

Federal Register 2010, 2011, 2012, 2013

...Taking of Marine Mammals Incidental to the Explosive Removal of Offshore Structures in the...take marine mammals incidental to the explosive removal of offshore oil and gas structures...bottlenose dolphin was unrelated to the use of explosives, and determined as unforeseen by...

2011-03-04

304

Offshore data base shows decline in rig accidents  

SciTech Connect

Institut Francais du Petrole (IFP) has compiled statistical figures on offshore accidents for risk, safety, and reliability studies. IFP calls this data base Platform. It provides a body of essential data for accidents concerning both mobile and stationary offshore drilling rigs. Historical accident data bases are a basic implement for risk assessment of safety and reliability. IFP has built this data base with all available information from 950 actual listings.

Bertrand, A.; Escoffier, L. (Institut Francais du Petrole, Rueil-Maimaison (FR))

1991-09-16

305

Fabrication and characterization of a micro turbine\\/bearing rig  

Microsoft Academic Search

This paper reports on a process to build, package, and instrument a 5-level wafer-bonded micromachined turbine\\/bearing rig. The process flow involves the use of 5 wafers, 16 masks, and 9 deep silicon etching steps, as well as utilizing aligned wafer bonding, double-sided deep reactive ion etching and laser-assisted-etching. This paper also shows experimental results on flow characteristics of the hydrostatic

Chuang-Chia Lin; Reza Ghodssi; Arturo A. Ayon; Dye-Zone Chen; Stuart Jacobson; Kenneth Breuer; Alan H. Epstein; Martin A. Schmidt

1999-01-01

306

Description of resonances within the rigged Hilbert space  

E-print Network

The spectrum of a quantum system has in general bound, scattering and resonant parts. The Hilbert space includes only the bound and scattering spectra, and discards the resonances. One must therefore enlarge the Hilbert space to a rigged Hilbert space, within which the physical bound, scattering and resonance spectra are included on the same footing. In these lectures, I will explain how this is done.

R. de la Madrid

2006-07-24

307

5'Triphosphate RNA Is the Ligand for RIG-I  

Microsoft Academic Search

The structural basis for the distinction of viral RNA from abundant self RNA in the cytoplasm of virally infected cells is largely unknown. We demonstrated that the 5'-triphosphate end of RNA generated by viral polymerases is responsible for retinoic acid-inducible protein I (RIG-I)-mediated detection of RNA molecules. Detection of 5'-triphosphate RNA is abrogated by capping of the 5'-triphosphate end or

Veit Hornung; Jana Ellegast; Sarah Kim; Krzysztof Brzózka; Andreas Jung; Hiroki Kato; Hendrik Poeck; Shizuo Akira; Karl-Klaus Conzelmann; Martin Schlee; Stefan Endres; Gunther Hartmann

2006-01-01

308

Lateral Stability Simulation of a Rail Truck on Roller Rig  

NASA Astrophysics Data System (ADS)

The development of experimental facilities for rail vehicle testing is being complemented by analytic studies. The purpose of this effort has been to gain insight into the dynamics of rail vehicles in order to guide development of the Roller Rigs and to establish an analytic framework for the design and interpretation of tests to be conducted on Roller Rigs. The work described here represents initial efforts towards meeting these objectives. Generic linear models were developed of a freight car (with a characteristic North American three-piece truck) on tangent track. The models were developed using the generalized multi body dynamics software MEDYNA. Predictions were made of the theoretical linear model hunting (lateral stability) characteristics of the freight car, i. e., the critical speeds and frequencies, for five different configurations: (a) freight car on track, (b) the freight car's front truck on the roller stand and its rear truck on track, (c) freight car on the roller rig, (d) a single truck on track, and (e) single truck on the roller stand. These were compared with the Association of American Railroads' field test data for an 80-ton hopper car equipped with A-3 ride control trucks. Agreement was reached among all the analytical models, with all models indicating a range of hunting speeds of 2% from the highest to lowest. The largest discrepancy, approximately 6%, was indicated between the models and the field test data. Parametric study results using linear model of freight truck on the roller rig show that (a) increasing roller radius increases critical speed (b) increasing the wheel initial cone angle will decrease the hunting speed (c) increasing the roller cant increases hunting speed (d) decrowning of the wheelset on the rollers will not effect the hunting speed but induces longitudinal destabilizing horizontal forces at the contact and (e) lozenging of wheelset on the rollers induces a yaw moment and the hunting speed decreases with increasing wheelset yaw angle.

Dukkipati, Rao V.

309

Study of Simulation Method of Time Evolution in Rigged QED  

E-print Network

We discuss how we formulate time evolution of physical quantities in the framework of the Rigged QED (Quantum Electrodynamics). The Rigged QED is a theory which has been proposed to treat dynamics of electrons, photons and atomic nuclei in atomic and molecular systems in a quantum field theoretic way. To solve the dynamics in the Rigged QED, we need different techniques from those developed for the conventional QED. As a first step toward this issue, we propose a procedure to expand the Dirac field operator, which represents electrons, by the electron annihilation/creation operators and solutions of the Dirac equation for electrons in nuclear potential. Similarly, the Schrodinger field operators, which represent atomic nuclei, are expanded by nucleus annihilation/creation operators. Then we derive time evolution equations for these annihilation and creation operators and discuss how time evolution of the operators for physical quantities can be calculated. In the end, we propose a method to approximate the evolution equations of the operators by the evolution equations for the density matrices of electrons and atomic nuclei. Under this approximation, we carry out numerical simulation of the time evolution of electron charge density of a hydrogen atom.

Kazuhide Ichikawa; Masahiro Fukuda; Akitomo Tachibana

2012-04-08

310

High pressure-resistant nonincendive emulsion explosive  

DOEpatents

An improved emulsion explosive composition including hollow microspheres/bulking agents having high density and high strength. The hollow microspheres/bulking agents have true particle densities of about 0.2 grams per cubic centimeter or greater and include glass, siliceous, ceramic and synthetic resin microspheres, expanded minerals, and mixtures thereof. The preferred weight percentage of hollow microspheres/bulking agents in the composition ranges from 3.0 to 10.0 A chlorinated paraffin oil, also present in the improved emulsion explosive composition, imparts a higher film strength to the oil phase in the emulsion. The emulsion is rendered nonincendive by the production of sodium chloride in situ via the decomposition of sodium nitrate, a chlorinated paraffin oil, and sodium perchlorate. The air-gap sensitivity is improved by the in situ formation of monomethylamine perchlorate from dissolved monomethylamine nitrate and sodium perchlorate. The emulsion explosive composition can withstand static pressures to 139 bars and dynamic pressure loads on the order of 567 bars.

Ruhe, Thomas C. (Duquesne, PA); Rao, Pilaka P. (Baghlingampalli, IN)

1994-01-01

311

Negative Feedback Regulation of RIG-I-Mediated Antiviral Signaling by Interferon-Induced ISG15 Conjugation  

Microsoft Academic Search

RIG-I senses intracellular virus-specific nucleic acid structures and initiates an antiviral response that induces interferon (IFN) production, which, in turn, activates the transcription of RIG-I to increase RIG-I protein levels. Upon intracellular poly(I:C) stimulation, however, the levels of RIG-I protein did not correlate with the expression patterns of RIG-I transcripts. When the ISG15 conjugation system was overexpressed, ISG15 was conjugated

Min-Jung Kim; Sun-Young Hwang; Tadaatsu Imaizumi; Joo-Yeon Yoo

2008-01-01

312

GOM Deepwater Horizon Oil Spill: A Time Series Analysis of Variations in Spilled Hydrocarbons  

NASA Astrophysics Data System (ADS)

An estimated amount of 210 million gallons of crude oil was released into the Gulf of Mexico (GOM) from April 20th to July 15th 2010 during the Deepwater Horizon oil rig explosion. The spill caused a tremendous financial, ecological, environmental and health impact and continues to affect the GOM today. Variations in hydrocarbons including alkanes, hopanes and poly-cyclic aromatic hydrocarbons (PAHs) can be analyzed to better understand the oil spill and assist in oil source identification. Twenty-one sediment samples*, two tar ball samples and one surface water oil sample were obtained from distinct locations in the GOM and within varying time frames from May to December 2010. Each sample was extracted through the ASE 200 solvent extractor, concentrated down under nitrogen gas, purified through an alumina column, concentrated down again with nitrogen gas and analyzed via GC X GC-TOF MS. Forty-one different hydrocarbons were quantified in each sample. Various hydrocarbon 'fingerprints,' such as parental :alkylate PAH ratios, high molecular weight PAHs: low molecular weight alkane ratios, and carbon preference index were calculated. The initial objective of this project was to identify the relative hydrocarbon contributions of petrogenic sources and combustion sources. Based on the calculated ratios, it is evident that the sediment core taken in October of 2010 was greatly affected by combustion sources. Following the first month of the spill, oil in the gulf was burned in attempts to contain the spill. Combustion related sources have quicker sedimentation rates, and hydrocarbons from a combustion source essentially move into deeper depths quicker than those from a petrogenic source, as was observed in analyses of the October 2010 sediment. *Of the twenty-one sediment samples prepared, nine were quantified for this project.

Palomo, C. M.; Yan, B.

2013-12-01

313

Oil shale, tar sands, and related materials  

Microsoft Academic Search

This sixteen-chapter book focuses on the many problems and the new methodology associated with the commercialization of the oil shale and tar sand industry. Topics discussed include: an overview of the Department of Energy's oil shale R, D, and D program; computer simulation of explosive fracture of oil shale; fracturing of oil shale by treatment with liquid sulfur dioxide; chemistry

Stauffer

1981-01-01

314

RIG-I Self-Oligomerization Is Either Dispensable or Very Transient for Signal Transduction  

PubMed Central

Effective host defence against viruses depends on the rapid triggering of innate immunity through the induction of a type I interferon (IFN) response. To this end, microbe-associated molecular patterns are detected by dedicated receptors. Among them, the RIG-I-like receptors RIG-I and MDA5 activate IFN gene expression upon sensing viral RNA in the cytoplasm. While MDA5 forms long filaments in vitro upon activation, RIG-I is believed to oligomerize after RNA binding in order to transduce a signal. Here, we show that in vitro binding of synthetic RNA mimicking that of Mononegavirales (Ebola, rabies and measles viruses) leader sequences to purified RIG-I does not induce RIG-I oligomerization. Furthermore, in cells devoid of endogenous functional RIG-I-like receptors, after activation of exogenous Flag-RIG-I by a 62-mer-5?ppp-dsRNA or by polyinosinic:polycytidylic acid, a dsRNA analogue, or by measles virus infection, anti-Flag immunoprecipitation and specific elution with Flag peptide indicated a monomeric form of RIG-I. Accordingly, when using the Gaussia Luciferase-Based Protein Complementation Assay (PCA), a more sensitive in cellula assay, no RIG-I oligomerization could be detected upon RNA stimulation. Altogether our data indicate that the need for self-oligomerization of RIG-I for signal transduction is either dispensable or very transient. PMID:25259935

Louber, Jade; Kowalinski, Eva; Bloyet, Louis-Marie; Brunel, Joanna; Cusack, Stephen; Gerlier, Denis

2014-01-01

315

Optically measured explosive impulse  

NASA Astrophysics Data System (ADS)

An experimental technique is investigated to optically measure the explosive impulse produced by laboratory-scale spherical charges detonated in air. Explosive impulse has historically been calculated from temporal pressure measurements obtained via piezoelectric transducers. The presented technique instead combines schlieren flow visualization and high-speed digital imaging to optically measure explosive impulse. Prior to an explosive event, schlieren system calibration is performed using known light-ray refractions and resulting digital image intensities. Explosive charges are detonated in the test section of a schlieren system and imaged by a high-speed digital camera in pseudo-streak mode. Spatiotemporal schlieren intensity maps are converted using an Abel deconvolution, Rankine-Hugoniot jump equations, ideal gas law, triangular temperature decay profile, and Schardin's standard photometric technique to yield spatiotemporal pressure maps. Temporal integration of individual pixel pressure profiles over the positive pressure duration of the shock wave yields the explosive impulse generated for a given radial standoff. Calculated explosive impulses are shown to exhibit good agreement between optically derived values and pencil gage pressure transducers.

Biss, Matthew M.; McNesby, Kevin L.

2014-06-01

316

Simulation of high explosive explosion using adaptive material point method  

Microsoft Academic Search

Numerical simulation of high explosive explosion problems is a big challenge to traditional numerical methods because explosion usually involves ex- tremely large deformation and multi-material interaction of different phases. Re- centlydevelopedmeshfreemethodsshowmuchadvantagesovermesh-basedmethod for problems associated with very large deformation. Some of them have been successfully applied to impact and explosion problems, such as smoothed particle hydrodynamics (SPH). Similar to SPH, material

Shang Ma; Xiong Zhang; Yanping Lian; Xu Zhou

2009-01-01

317

FOUDRE ET ATMOSPHERES EXPLOSIVES LIGHTNING AND EXPLOSIVES ATMOSPHERES  

E-print Network

97-36 FOUDRE ET ATMOSPHERES EXPLOSIVES LIGHTNING AND EXPLOSIVES ATMOSPHERES HALAMA S., 1NERIS l'utilisation de produits sensibles pouvant provoquer facilement des incendies et des explosions. C inflammables. Les atmospheres explosives gazeuses et poussiereuses ainsi que les conditions favorisant [eur

Paris-Sud XI, Université de

318

Method for loading explosive laterally from a borehole  

DOEpatents

There is provided a method for forming an in situ oil shale retort in a subterranean formation containing oil shale. At least one void is excavated in the formation, leaving zones of unfragmented formation adjacent the void. An array of main blastholes is formed in the zone of unfragmented formation and at least one explosive charge which is shaped for forming a high velocity gas jet is placed into a main blasthole with the axis of the gas jet extending transverse to the blasthole. The shaped charge is detonated for forming an auxiliary blasthole in the unfragmented formation adjacent a side wall of the main blasthole. The auxiliary blasthole extends laterally away from the main blasthole. Explosive is placed into the main blasthole and into the auxiliary blasthole and is detonated for explosively expanding formation towards the free face for forming a fragmented permeable mass of formation particles in the in situ oil shale retort.

Ricketts, Thomas E. (Grand Junction, CO)

1981-01-01

319

Lithium niobate explosion monitor  

DOEpatents

Monitoring explosive devices is accomplished with a substantially z-cut lithium niobate crystal in abutment with the explosive device. Upon impact by a shock wave from detonation of the explosive device, the crystal emits a current pulse prior to destruction of the crystal. The current pulse is detected by a current viewing transformer and recorded as a function of time in nanoseconds. In order to self-check the crystal, the crystal has a chromium film resistor deposited thereon which may be heated by a current pulse prior to detonation. This generates a charge which is detected by a charge amplifier. 8 figs.

Bundy, C.H.; Graham, R.A.; Kuehn, S.F.; Precit, R.R.; Rogers, M.S.

1990-01-09

320

Lithium niobate explosion monitor  

DOEpatents

Monitoring explosive devices is accomplished with a substantially z-cut lithium niobate crystal in abutment with the explosive device. Upon impact by a shock wave from detonation of the explosive device, the crystal emits a current pulse prior to destruction of the crystal. The current pulse is detected by a current viewing transformer and recorded as a function of time in nanoseconds. In order to self-check the crystal, the crystal has a chromium film resistor deposited thereon which may be heated by a current pulse prior to detonation. This generates a charge which is detected by a charge amplifier.

Bundy, Charles H. (Clearwater, FL); Graham, Robert A. (Los Lunas, NM); Kuehn, Stephen F. (Albuquerque, NM); Precit, Richard R. (Albuquerque, NM); Rogers, Michael S. (Albuquerque, NM)

1990-01-01

321

Micro-explosion of compound drops  

NASA Astrophysics Data System (ADS)

Introducing water into spray combustion systems, by either water-in-oil emulsification or supplementary water injection, is one of the major techniques for combustion improvement and NOx reduction. Plentiful researches are available on combustion of water-in-oil emulsion fuel drops. The emulsified liquid is a heterogeneous mixture of immiscible liquids. One component forms the continuous phase and the other component forms the discrete phase. The discrete phase consists of globules of the one fluid that are suspended in the continuous phase fluid. Water-in-oil emulsions are commonly considered for combustion applications because emulsions can result in micro-explosion, thereby reducing the average drop diameter to enhance liquid vaporization, and suppressing the formation of soot and NOx. However, the water addition generally does not exceed about 20% for smooth engine operations[!, 21. The combustion characteristics and micro-explosion of emulsion drop were studied by many researchers. The micro-explosion of water in fuel emulsion drops was caused by very fast growth of superheated water vapor bubbles, its superheat limits must be lower than the boiling point temperature of the fuel. These bubbles were primarily governed by the pressure difference between the superheated vapor and the liquid, and by the inertia imparted to the liquid by the motion of the bubble surface[3 6 In this study, we used a coaxial nozzle to generation the multi-component drop. The different type of water-in-oil fuel drops called the compound drops. Unlike an emulsion drop, a compound drop consists of a water core and a fuel shell, which can originate from the phase separation of emulsion[7, 81 or a water drop colliding with a fuel drop[9, 101 Burning and micro-explosion of compound drops have been found to be distinct from those of emulsion drops[9-111 Wang et al.[9 , 101 studied the combustion characteristics of collision merged alkane-water drops. The merged drops appeared in adhesive and inserted manners. The drop ignition delay time increased with increasing water content. The average burning rate of alkane-water drops decreased with increasing water content. In the burning process, hexadecane-water drops exhibited flash vaporization or flame extinction. Heterogeneous explosion was occasionally observed in drops with trapped air bubbles. The air bubbles were assumed to be the nucleation points of the heterogeneous explosions. Chen and Lin[11 studied the characteristics of water-in-dodecane compound drop with different water content, diameter of drop and environmental oxygen concentration. The vaporization rate increased with increasing environmental oxygen concentration. The compound drops micro-exploded during the burning process in a random way. The number of micro-explosions was majorly influenced by drop diameter, followed by environmental oxygen concentration. Water content had a weaker effect on micro-explosion. As available literature and research results of compound drop burning are scarce, their combustion and micro-explosion behaviors are still poorly understood. In this regard, we changed the drop nature as compound drops to study their combustion characteristics and micro-explosion phenomena.

Chen, Chun-Kuei; Lin, Ta-Hui

2014-08-01

322

Deepwater Horizon Study Finds Crude Oil Harmful to Bluefin, Yellowfin Tuna  

E-print Network

, as a large plume of smoke rises from fires on BP's Deepwater Horizon offshore oil rig. Image: Gerald Herbert Deepwater Horizon oil spill caused malformations in developing hearts of yellowfin and bluefin tuna into how the largest oil spill in U.S. history might have harmed young members of large fish species

Grosell, Martin

323

76 FR 64974 - Commerce in Explosives; List of Explosive Materials (2011R-18T)  

Federal Register 2010, 2011, 2012, 2013

...nitroisobutametriol trinitrate]. Nitrate explosive mixtures. Nitrate sensitized with gelled nitroparaffin. Nitrated carbohydrate explosive. Nitrated glucoside explosive. Nitrated polyhydric alcohol explosives. Nitric acid and a nitro aromatic...

2011-10-19

324

77 FR 58410 - Commerce in Explosives; List of Explosive Materials (2012R-10T)  

Federal Register 2010, 2011, 2012, 2013

...nitroisobutametriol trinitrate]. Nitrate explosive mixtures. Nitrate sensitized with gelled nitroparaffin. Nitrated carbohydrate explosive. Nitrated glucoside explosive. Nitrated polyhydric alcohol explosives. Nitric acid and a nitro aromatic...

2012-09-20

325

75 FR 70291 - Commerce in Explosives; List of Explosive Materials (2010R-27T)  

Federal Register 2010, 2011, 2012, 2013

...nitroisobutametriol trinitrate]. Nitrate explosive mixtures. Nitrate sensitized with gelled nitroparaffin. Nitrated carbohydrate explosive. Nitrated glucoside explosive. Nitrated polyhydric alcohol explosives. Nitric acid and a nitro aromatic...

2010-11-17

326

75 FR 1085 - Commerce in Explosives; List of Explosive Materials (2009R-18T)  

Federal Register 2010, 2011, 2012, 2013

...nitroisobutametriol trinitrate]. Nitrate explosive mixtures. Nitrate sensitized with gelled nitroparaffin. Nitrated carbohydrate explosive. Nitrated glucoside explosive. Nitrated polyhydric alcohol explosives. Nitric acid and a nitro aromatic...

2010-01-08

327

Idaho Explosives Detection System  

SciTech Connect

The Idaho Explosives Detection System (IEDS) was developed at the Idaho National Laboratory (INL) to respond to threats imposed by delivery trucks carrying explosives into military bases. A full-scale prototype system has been built and is currently undergoing testing. The system consists of two racks, one on each side of a subject vehicle. Each rack includes a neutron generator and an array of NaI detectors. The two neutron generators are pulsed and synchronized. A laptop computer controls the entire system. The control software is easily operable by minimally trained staff. The system was developed to detect explosives in a medium size truck within a 5-minute measurement time. System performance was successfully demonstrated with explosives at the INL in June 2004 and at Andrews Air Force Base in July 2004.

Edward L. Reber; J. Keith Jewell; Larry G. Blackwood; Andrew J. Edwards; Kenneth W. Rohde; Edward H. Seabury

2004-10-01

328

Disorder induces explosive synchronization  

NASA Astrophysics Data System (ADS)

We study explosive synchronization, a phenomenon characterized by first-order phase transitions between incoherent and synchronized states in networks of coupled oscillators. While explosive synchronization has been the subject of many recent studies, in each case strong conditions on the heterogeneity of the network, its link weights, or its initial construction are imposed to engineer a first-order phase transition. This raises the question of how robust explosive synchronization is in view of more realistic structural and dynamical properties. Here we show that explosive synchronization can be induced in mildly heterogeneous networks by the addition of quenched disorder to the oscillators' frequencies, demonstrating that it is not only robust to, but moreover promoted by, this natural mechanism. We support these findings with numerical and analytical results, presenting simulations of a real neural network as well as a self-consistency theory used to study synthetic networks.

Skardal, Per Sebastian; Arenas, Alex

2014-06-01

329

Explosive Magnetic Generators Of \\  

Microsoft Academic Search

Among the known types of electromagnetic energy sources, the explosive magnetic generators (=G) are the best characterized in terms of their specific energy output and cost. The results of studies on \\

V. K. Chernyahev; M. S. Protasov; V. A. Shevtsov; P. N. Fiskarev; B. I. Zharinov; G. I. Volkov; V. V. Vakhrunhev; B. B. Grinevitch; A. Ivanov; V. A. Demidov; C. V. Pak; X. P. Bidylo; V. P. Pogorelov; A. A. Petrukhin; A. I. Kuzjaev; V. B. Jakubov; V. I. Shpagin

1991-01-01

330

Disorder induces explosive synchronization.  

PubMed

We study explosive synchronization, a phenomenon characterized by first-order phase transitions between incoherent and synchronized states in networks of coupled oscillators. While explosive synchronization has been the subject of many recent studies, in each case strong conditions on the heterogeneity of the network, its link weights, or its initial construction are imposed to engineer a first-order phase transition. This raises the question of how robust explosive synchronization is in view of more realistic structural and dynamical properties. Here we show that explosive synchronization can be induced in mildly heterogeneous networks by the addition of quenched disorder to the oscillators' frequencies, demonstrating that it is not only robust to, but moreover promoted by, this natural mechanism. We support these findings with numerical and analytical results, presenting simulations of a real neural network as well as a self-consistency theory used to study synthetic networks. PMID:25019837

Skardal, Per Sebastian; Arenas, Alex

2014-06-01

331

Explosion suppression system  

DOEpatents

An explosion suppression system and triggering apparatus therefor are provided for quenching gas and dust explosions. An electrically actuated suppression mechanism which dispenses an extinguishing agent into the path ahead of the propagating flame is actuated by a triggering device which is light powered. This triggering device is located upstream of the propagating flame and converts light from the flame to an electrical actuation signal. A pressure arming device electrically connects the triggering device to the suppression device only when the explosion is sensed by a further characteristic thereof beside the flame such as the pioneer pressure wave. The light powered triggering device includes a solar panel which is disposed in the path of the explosion and oriented between horizontally downward and vertical. Testing mechanisms are also preferably provided to test the operation of the solar panel and detonator as well as the pressure arming mechanism.

Sapko, Michael J. (Finleyville, PA); Cortese, Robert A. (Pittsburgh, PA)

1992-01-01

332

Saturn's Hot Plasma Explosions  

NASA Video Gallery

This animation based on data obtained by NASA's Cassini Spacecraft shows how the "explosions" of hot plasma on the night side (orange and white) periodically inflate Saturn's magnetic field (white ...

333

Idaho Explosive Detection System  

ScienceCinema

Learn how INL researchers are making the world safer by developing an explosives detection system that can inspect cargo. For more information about INL security research, visit http://www.facebook.com/idahonationallaboratory

Klinger, Jeff

2013-05-28

334

Idaho Explosive Detection System  

SciTech Connect

Learn how INL researchers are making the world safer by developing an explosives detection system that can inspect cargo. For more information about INL security research, visit http://www.facebook.com/idahonationallaboratory

Klinger, Jeff

2011-01-01

335

Disorder induces explosive synchronization  

E-print Network

We study explosive synchronization, a phenomenon characterized by first-order phase transitions between incoherent and synchronized states in networks of coupled oscillators. While explosive synchronization has been the subject of many recent studies, in each case strong conditions on either the heterogeneity of the network, its link weights, or its initial construction are imposed to engineer a first-order phase transition. This raises the question of how robust explosive synchronization is in view of more realistic structural and dynamical properties. Here we show that explosive synchronization can be induced in mildly heterogeneous networks by the addition of quenched disorder to the oscillators' frequencies, demonstrating that it is not only robust to, but moreover promoted by, this natural mechanism. We support these findings with numerical and analytical results, presenting simulations of a real neural network as well as a self-consistency theory used to study synthetic networks.

Per Sebastian Skardal; Alex Arenas

2014-04-03

336

Parametric Explosion Spectral Model  

SciTech Connect

Small underground nuclear explosions need to be confidently detected, identified, and characterized in regions of the world where they have never before occurred. We develop a parametric model of the nuclear explosion seismic source spectrum derived from regional phases that is compatible with earthquake-based geometrical spreading and attenuation. Earthquake spectra are fit with a generalized version of the Brune spectrum, which is a three-parameter model that describes the long-period level, corner-frequency, and spectral slope at high-frequencies. Explosion spectra can be fit with similar spectral models whose parameters are then correlated with near-source geology and containment conditions. We observe a correlation of high gas-porosity (low-strength) with increased spectral slope. The relationship between the parametric equations and the geologic and containment conditions will assist in our physical understanding of the nuclear explosion source.

Ford, S R; Walter, W R

2012-01-19

337

Splashes from Underwater Explosions  

Microsoft Academic Search

The splashes from the underwater explosions of 1 and 10 1b. charges of P.E. no. 2 and Nobel's Explosive '808' at various depths have been photographed with cine-cameras. The experiments were carried out in a sheltered pond which enabled the surface phenomena to be studied in greater detail than has been done hitherto, and a number of new phenomena have

H. Kolsky; J. P. Lewis; M. T. Sampson; A. C. Shearman; C. I. Snow

1949-01-01

338

DOUBLE-RIG TWIN SHRIMP-TRAWLING GEAR USED IN GULF OF MEXICO  

E-print Network

DOUBLE-RIG TWIN SHRIMP-TRAWLING GEAR USED IN GULF OF MEXICO llar I IL Hulhs .Ir. I Ilt nil d Doublt advan...es technology sign of the out1'lgg rs, mast trud 1I b, an other rigging ..;omponent r lat d to h purpose 0: this paper IS to des nb on t 111 shrimp-trawling rig that has b en flsh d along the Texas 'oast

339

Negative regulation of the RIG-I signaling by the ubiquitin ligase RNF125  

Microsoft Academic Search

Retinoic acid-inducible gene I (RIG-I) plays a pivotal role in the regulation of cytokine production induced by pathogens. The RIG-I also augments the production of IFN and other cytokines via an amplification circuit. Because the production of cytokines is closely controlled, up- and down-regulation of RIG-I signaling also needs strict regulation. The mechanism of this regulation, however, remains elusive. Here,

Kei-ichiro Arimoto; Hitoshi Takahashi; Takayuki Hishiki; Hideyuki Konishi; Takashi Fujita; Kunitada Shimotohno

2007-01-01

340

Introduction Explosions in evolution problems The explosion time Stochastic Differential Equations with explosions  

E-print Network

Introduction Explosions in evolution problems The explosion time Stochastic Differential Equations with explosions Pablo Groisman University of Buenos Aires Joint work with J. Fern´andez Bonder, UBA J.D. Rossi, UBA ERPEM, November 29th, 2006 Pablo Groisman UBA Stochastic Differential Equations with explosions

Groisman, Pablo

341

Design and Development of High-Velocity Slurry Erosion Test Rig Using CFD  

NASA Astrophysics Data System (ADS)

Slurry erosion (SE) is commonly observed in almost all kinds of components and machineries involved in fluid (liquid) transfer and delivery. During design and development phase of these components, test rigs are usually required to evaluate their performance; however, only few detailed designs of test rigs are available for SE investigations. Among the existing designs of SE test rigs, most of them belong to rotary type. In the present study, design of a new type of SE test rig has been proposed, which is simpler in construction and working. This newly designed test rig could possibly eliminate some of the limitations (velocity-concentration interdependence and lack of acceleration distance) found in the existing set-ups. Calibration of the test rig was done for jet velocity and erodent concentration. Commissioning of the rig was undertaken by evaluating the effect of operating parameters (concentration and impingement angle) on the erosion rates of aluminum and cast iron. Results show that the rig was able to capture the traditional responses of ductile and brittle erosion behaviors being observed for these materials. Repeatability of the test rig was ensured, and the results were found to be within the acceptable error limits.

Grewal, H. S.; Agrawal, Anupam; Singh, H.

2013-01-01

342

Boeing 18-Inch Fan Rig Broadband Noise Test  

NASA Technical Reports Server (NTRS)

The purposes of the subject test were to identify and quantify the mechanisms by which fan broadband noise is produced, and to assess the validity of such theoretical models of those mechanisms as may be available. The test was conducted with the Boeing 18-inch fan rig in the Boeing Low-Speed Aeroacoustic Facility (LSAF). The rig was designed to be particularly clean and geometrically simple to facilitate theoretical modeling and to minimize sources of interfering noise. The inlet is cylindrical and is equipped with a boundary layer suction system. The fan is typical of modern high-by-pass ratio designs but is capable of operating with or without fan exit guide vanes (stators), and there is only a single flow stream. Fan loading and tip clearance are adjustable. Instrumentation included measurements of fan performance, the unsteady flow field incident on the fan and stators, and far-field and in-duct acoustic fields. The acoustic results were manipulated to estimate the noise generated by different sources. Significant fan broadband noise was found to come from the rotor self-noise as measured with clean inflow and no boundary layer. The rotor tip clearance affected rotor self-noise somewhat. The interaction of the rotor with inlet boundary layer turbulence is also a significant source, and is strongly affected by rotor tip clearance. High level noise can be generated by a high-order nonuniform rotating at a fraction of the fan speed, at least when tip clearance and loading are both large. Stator-generated noise is the loudest of the significant sources, by a small margin, at least on this rig. Stator noise is significantly affected by propagation through the fan.

Ganz, Ulrich W.; Joppa, Paul D.; Patten, Timothy J.; Scharpf, Daniel F.

1998-01-01

343

Singular Solutions to the Bethe Ansatz Equations and Rigged Configurations  

E-print Network

We provide a conjecture for the following two quantities related with the spin-$\\frac{1}{2}$ isotropic Heisenberg model defined over rings of even lengths: (i) the number of the solutions to the Bethe ansatz equations which correspond to non-zero Bethe vectors; (ii) the number of physical singular solutions of the Bethe ansatz equations in the sense of Nepomechie-Wang. The conjecture is based on a natural relationship between the solutions to the Bethe ansatz equations and the rigged configurations.

Anatol N. Kirillov; Reiho Sakamoto

2014-02-04

344

Singular solutions to the Bethe ansatz equations and rigged configurations  

NASA Astrophysics Data System (ADS)

We provide a conjecture for the following two quantities related to the spin-\\frac{1}{2} isotropic Heisenberg model defined over rings of even lengths: (i) the number of solutions to the Bethe ansatz equations which correspond to non-zero Bethe vectors; (ii) the number of physical singular solutions of the Bethe ansatz equations in the sense of Nepomechie and Wang 2013 J. Phys. A: Math. Theor. 46 325002. The conjecture is based on a natural relationship between the solutions to the Bethe ansatz equations and the rigged configurations.

Kirillov, Anatol N.; Sakamoto, Reiho

2014-05-01

345

Non-detonable and non-explosive explosive simulators  

DOEpatents

A simulator which is chemically equivalent to an explosive, but is not detonable or explodable is disclosed. The simulator is a combination of an explosive material with an inert material, either in a matrix or as a coating, where the explosive has a high surface ratio but small volume ratio. The simulator has particular use in the training of explosives detecting dogs, calibrating analytical instruments which are sensitive to either vapor or elemental composition, or other applications where the hazards associated with explosives is undesirable but where chemical and/or elemental equivalence is required. The explosive simulants may be fabricated by different techniques. A first method involves the use of standard slurry coatings to produce a material with a very high binder to explosive ratio without masking the explosive vapor, and a second method involves coating inert substrates with thin layers of explosive. 11 figs.

Simpson, R.L.; Pruneda, C.O.

1997-07-15

346

Non-detonable and non-explosive explosive simulators  

DOEpatents

A simulator which is chemically equivalent to an explosive, but is not detonable or explodable. The simulator is a combination of an explosive material with an inert material, either in a matrix or as a coating, where the explosive has a high surface ratio but small volume ratio. The simulator has particular use in the training of explosives detecting dogs, calibrating analytical instruments which are sensitive to either vapor or elemental composition, or other applications where the hazards associated with explosives is undesirable but where chemical and/or elemental equivalence is required. The explosive simulants may be fabricated by different techniques. A first method involves the use of standard slurry coatings to produce a material with a very high binder to explosive ratio without masking the explosive vapor, and a second method involves coating inert substrates with thin layers of explosive.

Simpson, Randall L. (Livermore, CA); Pruneda, Cesar O. (Livermore, CA)

1997-01-01

347

Technical and economic evaluation of selected compact drill rigs for drilling 10,000 foot geothermal production wells  

SciTech Connect

This report summarizes the investigation and evaluation of several {open_quotes}compact{close_quotes} drill rigs which could be used for drilling geothermal production wells. Use of these smaller rigs would save money by reducing mobilization costs, fuel consumption, crew sizes, and environmental impact. Advantages and disadvantages of currently-manufactured rigs are identified, and desirable characteristics for the {open_quotes}ideal{close_quotes} compact rig are defined. The report includes a detailed cost estimate of a specific rig, and an evaluation of the cost/benefit ratio of using this rig. Industry contacts for further information are given.

Huttrer, G.W. [Geothermal Management Company, Inc., Frisco, CO (United States)

1997-11-01

348

Rowan Gorilla I rigged up, heads for eastern Canada  

SciTech Connect

Designed to operate in very hostile offshore environments, the first of the Rowan Gorilla class of self-elevating drilling rigs has been towed to its drilling assignment offshore Nova Scotia. About 40% larger than other jackups, these rigs can operate in 300 ft of water, drilling holes as deep as 30,000 ft. They also feature unique high-pressure and solids control systems that are expected to improve drilling procedures and efficiencies. A quantitative formation pressure evaluation program for the Hewlett-Packard HP-41 handheld calculator computes formation pressures by three independent methods - the corrected d exponent, Bourgoyne and Young, and normalized penetration rate techniques for abnormal pressure detection and computation. Based on empirically derived drilling rate equations, each of the methods can be calculated separately, without being dependent on or influenced by the results or stored data from the other two subprograms. The quantitative interpretation procedure involves establishing a normal drilling rate trend and calculating the pore pressure from the magnitude of the drilling rate trend or plotting parameter increases above the trend line. Mobil's quick, accurate program could aid drilling operators in selecting the casing point, minimizing differential sticking, maintaining the proper mud weights to avoid kicks and lost circulation, and maximizing penetration rates.

Not Available

1984-03-01

349

Explosively separable casing  

DOEpatents

An explosively separable casing including a cylindrical afterbody and a circular cover for one end of the afterbody is disclosed. The afterbody has a cylindrical tongue extending longitudinally from one end which is matingly received in a corresponding groove in the cover. The groove is sized to provide a pocket between the end of the tongue and the remainder of the groove so that an explosive can be located therein. A seal is also provided between the tongue and the groove for sealing the pocket from the atmosphere. A frangible holding device is utilized to hold the cover to the afterbody. When the explosive is ignited, the increase in pressure in the pocket causes the cover to be accelerated away from the afterbody. Preferably, the inner wall of the afterbody is in the same plane as the inner wall of the tongue to provide a maximum space for storage in the afterbody and the side wall of the cover is thicker than the side wall of the afterbody so as to provide a sufficiently strong surrounding portion for the pocket in which the explosion takes place. The detonator for the explosive is also located on the cover and is carried away with the cover during separation. The seal is preferably located at the longitudinal end of the tongue and has a chevron cross section.

Jacobson, Albin K. (Albuquerque, NM); Rychnovsky, Raymond E. (Livermore, CA); Visbeck, Cornelius N. (Livermore, CA)

1985-01-01

350

Molecular models for explosives  

SciTech Connect

Any fundamental understanding of detonations and explosives' behavior requires as a starting point a knowledge of molecular properties. Indeed, there is a sizable literature concerning observed decomposition kinetics, x-ray crystal structures, heats of formation, etc. for explosives. As a result of this extensive experimental work, a large and ever increasing number of observed properties of explosives are available. Given sufficient data, models for the prediction of molecular properties can be developed and calibrated. Nevertheless, many desirable molecular properties can be obtained with considerable effort and, in many cases, experimental measurements are not possible for practical reasons; e.g., bond dissociation energies are very difficult to obtain for explosives. Consequently, theoretical methods for obtaining these properties are quite desirable. In addition, it is oftentimes desired to estimate the properties of unknown molecules. Consequently, methods for the estimation of molecular properties, which might seem quite crude by other standards, can be of considerable practical value. We present in this paper some of our recent efforts at extending and developing molecular models for explosives. These efforts fall into three main areas: Estimation of crystal densities of organic nitrates and perchlorates by an entirely empirical group additivity method; calculation of molecular heats of formation and bond dissociation energies (BDE's) by a semi-empirical molecular orbital method (AM1); and the electronic structure of nitrobenzene as obtained from non-empirical (sometimes called ab initio molecular orbital calculations. 10 refs.

Ritchie, J.P.; Bachrach, S.M.

1987-01-01

351

30 CFR 57.22606 - Explosive materials and blasting units (III mines).  

...placement of holes, possible breakthrough, and water. Ammonium nitrate blasting agents shall not be loaded into wet holes. ...Nonapproved explosives shall be used only as primers with ammonium nitrate-fuel oil blasting agents. Such primers shall be placed...

2014-07-01

352

Vapor explosion phenomena: Scaling considerations  

SciTech Connect

Past safety analyses considered the hazard from vapor explosions in a conservative manner where engineering judgment and conservative analyses were used to estimate the likelihood of nuclear reactor containment failure from explosion-induced missile generation [alpha-mode failure]. However, recent safety analyses may require less conservative methods to determine the hazard from vapor explosions; thus one may need to consider more detailed scaling of vapor explosion phenomena. This paper proposes particular scaling considerations for vapor explosions based on recent experimental results and that vapor explosions with prototypic reactor fuel material may be less of a hazard.

Corradini, M.L. [Univ. of Wisconsin, Madison, WI (United States)

1996-08-01

353

ELECTROMAGNETIC FIELD EFFECTS IN EXPLOSIVES  

SciTech Connect

Present and previous research on the effects of electromagnetic fields on the initiation and detonation of explosives and the electromagnetic properties of explosives are reviewed. Among the topics related to detonating explosives are: enhancement of performance; and control of initiation and growth of reaction. Two series of experiments were performed to determine the effects of 1-T magnetic fields on explosive initiation and growth in the modified gap test and on the propagation of explosively generated plasma into air. The results have implications for the control of reactions in explosives and for the use of electromagnetic particle velocity gauges.

Tasker, D. G.; Whitley, V. H. [MS J566, Los Alamos National Laboratory, Los Alamos, NM 87545 (United States); Lee, R. J. [Lndian Head Division, Naval Surface Warfare Center, Indian Head, MD 20640 (United States)

2009-12-28

354

Geologic characteristics in the vicinity of the Deepwater Horizon oil spill  

Microsoft Academic Search

On April 20, 2010, the Deepwater Horizon offshore drilling rig experienced a catastrophic explosion and fire. At the time, it was drilling about 70km southeast of the mouth of the Mississippi River. A couple of days later it lay on the sea floor in more than 1500m of water. The drilling riser that extended from the sea floor to the

T. McGee

2010-01-01

355

Continuous steam explosion  

SciTech Connect

StakeTech has focused on developing steam explosion on a commercial basis. The company essentially a biomass conversion company dealing with cellulosic biomass such as wood, crop residues and, more recently, wastepaper and municipal solid waste (MSW). They are faced with a tremendous opportunity to develop uses for the 50% of biomass that is currently wasted. The StakeTech steam explosion process is able to break the bonds using only high-pressure steam with no chemical additives. The continuous StakeTech System now has been installed in five countries and has proved effective in processing a wide variety of raw materials including wood chips, straw, sugarcane bagasse, and waste paper. End-use applications range from specialty chemicals to large-volume agricultural products. The increase of development activities in steam explosion should lead to expanded end-use applications, and acceptance of the technology by industry should accelerate in the years to come.

Taylor, J.D.; Yu, E.K.C. [Stake Technology Ltd., Norval, Ontario (Canada)

1995-02-01

356

Bioremediation of explosives  

SciTech Connect

The extensive manufacture, packing, and the use of explosives has often resulted in significant contamination of soils and ground waters near these activities. Congressional mandate has now required that such sites be remediated. An especially promising technology for this explosives problem is biotechnology. When applicable, biotechnology is cheap and provides complete conversion of hazardous compounds to harmless biomass or carbon dioxide. The focus of this paper will be on our present understanding of the microbial metabolism of the explosives, TNT and RDX, which have been used most extensively in the United States. To assure that an efficient process is developed for TNT biodegradation, we are conducting appropriate lab scale tests with TNT contaminated soil. First, we are testing their efficiency in soil/water slurries; we are also testing their efficiency in a column system designed to simulate composting conditions. A pilot scale test of this bacterial degradation will be conducted as soon as weather permits. 36 refs., 5 figs.

Unkefer, P.J.; Alvarez, M.A.; Hanners, J.L.; Unkefer, C.J.; Stenger, M.; Margiotta, E.A.

1990-01-01

357

Explosive Synchronization is Discontinuous  

E-print Network

Spontaneous explosive is an abrupt transition to collective behavior taking place in heterogeneous networks when the frequencies of the nodes are positively correlated to the node degree. This explosive transition was conjectured to be discontinuous. Indeed, numerical investigations reveal a hysteresis behavior associated with the transition. Here, we analyze explosive synchronization in star graphs. We show that in the thermodynamic limit the transition to (and out) collective behavior is indeed discontinuous. The discontinuous nature of the transition is related to the nonlinear behavior of the order parameter, which in the thermodynamic limit exhibits multiple fixed points. Moreover, we unravel the hysteresis behavior in terms of the graph parameters. Our numerical results show that finite size graphs are well described by our predictions.

Vladimir Vlasov; Yong Zou; Tiago Pereira

2014-11-25

358

A real explosion: the requirement of steam explosion pretreatment.  

PubMed

The severity factor is a common term used in steam explosion (SE) pretreatment that describes the combined effects of the temperature and duration of the pretreatment. However, it ignores the duration of the explosion process. This paper describes a new parameter, the explosion power density (EPD), which is independent of the severity factor. Furthermore, we present the adoption of a 5m(3) SE model for a catapult explosion mode, which completes the explosion within 0.0875 s. The explosion duration ratio of this model to a conventional model of the same volume is 1:123. The comparison between the two modes revealed a qualitative change by explosion speed, demonstrating that this real explosion satisfied the two requirements of consistency, and suggested a guiding mechanism for the design of SE devices. PMID:22858504

Yu, Zhengdao; Zhang, Bailiang; Yu, Fuqiang; Xu, Guizhuan; Song, Andong

2012-10-01

359

Effect of anisotropy in explosive fragmentation  

SciTech Connect

The behavior of rocks at large deformations is characterized, including the effects of crack growth when unstable, the effects of anisotropy, the distinction between open and closed cracks, the influence of crack intersections, the role of pore pressure, and a calculation of permeability. The theory is quite general, and is intended for use in a computer program rather than as a vehicle for obtaining analytic results. When a spherical explosive charge is embedded in oil shale it produces an aspirin-shaped cavity at late times as a result of the bedded structure of the rock. In this paper a calculation of the cavity produced by a spherical explosive is compared with a radiograph, showing remarkable agreement between the two. The shape of the cavity is explained by the behavior of cracks lying in the bedding planes.

Dienes, J.K.

1981-01-01

360

Department of Mechanical Engineering Dresser-Rand 1: LNG Test Rig Movable LSD Vanes  

E-print Network

PENNSTATE Department of Mechanical Engineering Fall 2011 Dresser-Rand 1: LNG Test Rig Movable LSD (LSD) vanes which can easily be incorporated into current test rigs for centrifugal gas compressors of the system Approach Our team started the project by doing an extensive study on LSD vanes and current

Demirel, Melik C.

361

Numerical and experimental determination of neutron characteristics in irradiation rigs operated in LVR-15 research reactor.  

PubMed

The LVR-15 reactor is a 10-MW research reactor mostly dedicated to material research and isotope production. Material testing can be performed in various irradiation loops and rigs. For specimen irradiation, several rig constructions can be used, including standard single-cell CHOUCA rigs or special dedicated multi-cell rigs. The temperature in the rigs is controlled by a temperature control system, which can be operated in a stable or pulsed mode, with regard to the rig design. Irradiation conditions in the rig are monitored by a set of various fluence detectors. From these detectors, neutron fluence and its energy distribution can be determined for the whole volume of irradiation samples. Besides measurement, irradiation conditions are calculated by the Monte Carlo code MCNPX, which provides a complete review of irradiation conditions including neutron fluence and its energy distribution in samples and detectors, radiation damage and radiation heating conditions for the rig. A set of experimental and theoretical characteristics for dedicated irradiation positions in the core reflector and in fuel will be provided. PMID:24972899

Koleska, Michal; Viererbl, Ladislav; Lahodova, Zdena; Ernest, Jaroslav; Zmitkova, Jelena; Marek, Milan

2014-10-01

362

Direct Estimation of Motion and Extended Scene Structure from a Moving Stereo Rig  

Microsoft Academic Search

We investigate the relationship between the kine- matics (infinitesimal motion model) of a calibrated Stereo Rig and point and line image feature measure- ments seen at two time instances of the rig's motion (four images in all). In particular, we are interested in the byproduct of this analysis providing a direct con- nection between the spatio-temporal derivatives of the images

Gideon P. Stein; Amnon Shashua

1998-01-01

363

DESIGN AND CONSTRUCTION OF A FLUIDIZED-BED COMBUSTION SAMPLING AND ANALYTICAL TEST RIG  

EPA Science Inventory

The report describes the design, construction, and installation of a fluidized-bed coal combustion sampling and analytical test rig in the High Bay Area (Wing G) of EPA's Industrial Environmental Research Laboratory (IERL), Research Triangle Park, North Carolina. The rig, to be u...

364

Negative regulation of RIG-I-mediated antiviral signaling by TRK-fused gene (TFG) protein  

SciTech Connect

Highlights: •TRK-fused gene product (TFG) interacts with TRIM25 upon viral infection. •TFG negatively regulates RIG-I mediated antiviral signaling. •TFG depletion leads to enhanced viral replication. •TFG act downstream of MAVS. -- Abstract: RIG-I (retinoic acid inducible gene I)-mediated antiviral signaling serves as the first line of defense against viral infection. Upon detection of viral RNA, RIG-I undergoes TRIM25 (tripartite motif protein 25)-mediated K63-linked ubiquitination, leading to type I interferon (IFN) production. In this study, we demonstrate that TRK-fused gene (TFG) protein, previously identified as a TRIM25-interacting protein, binds TRIM25 upon virus infection and negatively regulates RIG-I-mediated type-I IFN signaling. RIG-I-mediated IFN production and nuclear factor (NF)-?B signaling pathways were upregulated by the suppression of TFG expression. Furthermore, vesicular stomatitis virus (VSV) replication was significantly inhibited by small inhibitory hairpin RNA (shRNA)-mediated knockdown of TFG, supporting the suppressive role of TFG in RIG-I-mediated antiviral signaling. Interestingly, suppression of TFG expression increased not only RIG-I-mediated signaling but also MAVS (mitochondrial antiviral signaling protein)-induced signaling, suggesting that TFG plays a pivotal role in negative regulation of RNA-sensing, RIG-I-like receptor (RLR) family signaling pathways.

Lee, Na-Rae; Shin, Han-Bo; Kim, Hye-In; Choi, Myung-Soo; Inn, Kyung-Soo, E-mail: innks@khu.ac.kr

2013-07-19

365

Development of a test rig for the active control of a segmented mirror support system  

Microsoft Academic Search

Within the preliminary developments related to the Gran Telescopio Canarias, a test rig is being designed for the active control of the support system of the segmented primary mirror. The construction of this test rig will be divided in two phases: the first one will basically consist in the implementation and testing of a displacement sensor prototype as well as

F. Javier Castro; Juan C. González; Haresh M. Chulani; Josep M. Fuertes; Sergi de Miguel

366

Development of a Rig and Testing Procedures for the Experimental Investigation of Horizontal Axis Kinetic Turbines  

E-print Network

the velocity field data at the rotor plane obtained from the water tunnel PIV test data, and CFD simulations, including both wind turbines and tidal turbines. The testing rig was designed for use in a water tunnel was to design a rig to fit into an existing water tunnel facility with a cross sectional area of 45 by 45 cm

Victoria, University of

367

Laser initiation of explosives  

NASA Astrophysics Data System (ADS)

Through laser initiation of explosives offers many advantages like controlled threshold energy over wide range, replacement of complicated safety arming mechanisms to simple and better system, immunity to RF/EMI environment etc, but there is greater difficulty to build detonator for all purpose applications and regular field trials. The challenges are to understand the interaction of laser radiation or its induced plasma with explosives, launching and transmission of high power laser beam, coupling and focussing to desired target area. This paper looks into the details of those facts.

Singh, Manpreet; Sethi, V. S.

2002-09-01

368

Microcantilever detector for explosives  

DOEpatents

Methods and apparatus for detecting the presence of explosives by analyzing a vapor sample from the suspect vicinity utilize at least one microcantilever. Explosive gas molecules which have been adsorbed onto the microcantilever are subsequently heated to cause combustion. Heat, along with momentum transfer from combustion, causes bending and a transient resonance response of the microcantilever which may be detected by a laser diode which is focused on the microcantilever and a photodetector which detects deflection of the reflected laser beam caused by heat-induced deflection and resonance response of the microcantilever. 2 figs.

Thundat, T.G.

1999-06-29

369

The design of a test rig for the identification of dynamic coefficients of a high temperature magnetic bearing  

E-print Network

This thesis is a report on the research and Micrographics. development to design a test rig for the identification of the dynamic coefficients of a radial magnetic bearing. The test rig development is intended for dynamic coefficient observation...

Rahtika, I Putu Gede Sopan

2012-06-07

370

30 CFR 250.405 - What are the safety requirements for diesel engines used on a drilling rig?  

Code of Federal Regulations, 2012 CFR

... What are the safety requirements for diesel engines used on a drilling rig? 250... What are the safety requirements for diesel engines used on a drilling rig? You must equip each diesel engine with an air take device to...

2012-07-01

371

30 CFR 250.405 - What are the safety requirements for diesel engines used on a drilling rig?  

... What are the safety requirements for diesel engines used on a drilling rig? 250... What are the safety requirements for diesel engines used on a drilling rig? You must equip each diesel engine with an air take device to...

2014-07-01

372

30 CFR 250.405 - What are the safety requirements for diesel engines used on a drilling rig?  

Code of Federal Regulations, 2010 CFR

... What are the safety requirements for diesel engines used on a drilling rig? 250... What are the safety requirements for diesel engines used on a drilling rig? You must equip each diesel engine with an air take device to...

2010-07-01

373

30 CFR 250.405 - What are the safety requirements for diesel engines used on a drilling rig?  

Code of Federal Regulations, 2011 CFR

... What are the safety requirements for diesel engines used on a drilling rig? 250... What are the safety requirements for diesel engines used on a drilling rig? You must equip each diesel engine with an air take device to...

2011-07-01

374

30 CFR 250.405 - What are the safety requirements for diesel engines used on a drilling rig?  

Code of Federal Regulations, 2013 CFR

... What are the safety requirements for diesel engines used on a drilling rig? 250... What are the safety requirements for diesel engines used on a drilling rig? You must equip each diesel engine with an air take device to...

2013-07-01

375

Physically based simulation of explosions  

E-print Network

This thesis describes a method for using physically based techniques to model an explosion and the resulting side effects. Explosions are some of the most visually exciting phenomena known to humankind and have become nearly ubiquitous in action...

Roach, Matthew Douglas

2005-08-29

376

Regulation of innate antiviral defenses through a shared repressor domain in RIG-I and LGP2  

Microsoft Academic Search

RIG-I is an RNA helicase containing caspase activation and recruitment domains (CARDs). RNA binding and signaling by RIG-I are implicated in pathogen recognition and triggering of IFN-?\\/? immune defenses that impact cell permissiveness for hepatitis C virus (HCV). Here we evaluated the processes that control RIG-I signaling. RNA binding studies and analysis of cells lacking RIG-I, or the related MDA5

Takeshi Saito; Reiko Hirai; Y.-M. Loo; David Owen; C. L. Johnson; S. C. Sinha; Shizuo Akira; Takashi Fujita; Michael Gale Jr.

2007-01-01

377

LLNL explosives handbook: properties of chemical explosives and explosives and explosive simulants  

Microsoft Academic Search

This handbook presents information and data for high explosives (HEs) of interest to programs at the Lawrence Livermore National Laboratory (LLNL) and other Department of Energy (DOE) facilities. It is intended to be useful to the scientist or engineer, the novice or expert, who needs to develop a new weapon system, design a physics experiment, or select and\\/or evaluate an

Dobratz

1981-01-01

378

Portable raman explosives detection  

SciTech Connect

Recent advances in portable Raman instruments have dramatically increased their application to emergency response and forensics, as well as homeland defense. This paper reviews the relevant attributes and disadvantages of portable Raman spectroscopy, both essentially and instrumentally, to the task of explosives detection in the field.

Moore, David Steven [Los Alamos National Laboratory; Scharff, Robert J [Los Alamos National Laboratory

2008-01-01

379

Managing the data explosion  

USGS Publications Warehouse

The 'data explosion' brought on by electronic sensors and automatic samplers can strain the capabilities of existing water-quality data-management systems just when they're needed most to process the information. The U.S. Geological Survey has responded to the problem by setting up an innovative system that allows rapid data analysis.

Hooper, Richard P.; Aulenbach, Brent T.

1993-01-01

380

The combustion of explosives  

SciTech Connect

The safe use of energetic materials has been scientifically studied for over 100 years. Even with this long history of scientific inquiry, the level of understanding of the important deflagration phenomena in accidental initiations of high explosives remains inadequate to predict the response to possible thermal and mechanical (impact) scenarios. The! search also continues for more well behaved explosives and propellants that perform well, yet are insensitive. Once ignition occurs in an explosive, the question then becomes what the resulting violence will be. The classical view is that simple wave propagation proceeds from the ignition point. Recently, several experiments have elucidated the importance of reactive cracks involved in reaction violence in both thermally ignited experiments and impacted explosives, in contrast to classical assumptions, This work presents a viiw of reaction violence, in both thermal and mechanical insults, that argues for the importance of reactive cracks, rather than simple wave propagation processes. Recent work in this area will be reviewed and presented. Initial results involving novel energetic materials will also be discussed.

Son, S. F. (Steven F.)

2001-01-01

381

Underwater electrical wire explosion  

Microsoft Academic Search

A brief review of the results obtained in recent research of underwater electrical wire explosions using microsecond and nanosecond generators is presented. It was shown that the increase in the rate of energy input into the exploding wire allows one to increase the wire temperature and amplitude of shock waves (SWs). Estimated energy deposition into Cu and Al wire material

Ya E. Krasik; A. Fedotov; D. Sheftman; S. Efimov; A. Sayapin; V. Tz Gurovich; D. Veksler; G. Bazalitski; S. Gleizer; A. Grinenko; V. I. Oreshkin

2010-01-01

382

Underwater electrical wire explosion  

NASA Astrophysics Data System (ADS)

A brief review of the results obtained in recent research of underwater electrical wire explosions using microsecond and nanosecond generators is presented. It was shown that the increase in the rate of energy input into the exploding wire allows one to increase the wire temperature and amplitude of shock waves (SWs). Estimated energy deposition into Cu and Al wire material of up to 200 eV/atom was achieved. In microsecond time scale wire explosion, a good agreement was attained between the wire resistance calculated using the equation of state (EOS) and that obtained experimentally. Conversely, in nanosecond time scale wire explosion, the wire resistance of EOS was modified in order to fit experimental data. Analysis of the emitted radiation showed that black body approximation cannot be used to characterize exploding wire radiation. It was found that <=24% of the deposited energy is transferred into the water flow's mechanical energy. Also, it was shown that converging SWs formed by the explosion of cylindrical wire arrays can be used to achieve a pressure up to 250 kbar at the axis of implosion. Hydrodynamic simulations showed that with the use of relatively moderate pulsed power generators with stored energy of several hundred kilojoules, a pressure of several megabar can be achieved at the axis of implosion.

Krasik, Ya E.; Fedotov, A.; Sheftman, D.; Efimov, S.; Sayapin, A.; Gurovich, V. Tz; Veksler, D.; Bazalitski, G.; Gleizer, S.; Grinenko, A.; Oreshkin, V. I.

2010-06-01

383

Explosives signatures and analysis  

Microsoft Academic Search

The challenge of sampling explosive materials for various high threat military and civilian operational scenarios requires the community to identify and exploit other chemical compounds within the mixtures that may be available to support stand-off detection techniques. While limited surface and vapor phase characterization of IEDs exist, they are insufficient to guide the future development and evaluation of field deployable

Jonathan M. Oyler

2008-01-01

384

Portable Raman explosives detection  

Microsoft Academic Search

Recent advances in portable Raman instruments have dramatically increased their application to emergency response and forensics,\\u000a as well as homeland defense. This paper reviews the relevant attributes and disadvantages of portable Raman spectroscopy,\\u000a both essentially and instrumentally, to the task of explosives detection in the field.

David S. Moore; R. Jason Scharff

2009-01-01

385

Explosive Z Pinch  

E-print Network

We propose an explanation for the recently observed powerful contained explosion in a Z pinch experiment performed at Sandia National Laboratories. Our arguments are based on the assumption that a pure SU(2) Yang-Mills theory of scale $\\sim 0.5 $MeV is responsible for the emergence of the electron and its neutrino.

Francesco Giacosa; Ralf Hofmann; Markus Schwarz

2006-04-20

386

Ecotoxicology of Explosives  

SciTech Connect

Managing sites contaminated with munitions constituents is an international challenge. Although the choice of approach and the use of Ecological Risk Assessment (ERA) tools may vary from country to country, the assurance of quality and the direction of ecotoxicological research are universally recognized as shared concerns. Drawing on a multidisciplinary team of contributors, 'Ecotoxicology of Explosives' provides comprehensive and critical reviews available to date on fate, transport, and effects of explosives. The book delineates the state of the science of the ecotoxicology of explosives, past, present, and recently developed. It reviews the accessible fate and ecotoxicological data for energetic materials (EMs) and the methods for their development. The chapters characterize the fate of explosives in the environment, then provide information on their ecological effects in key environmental media, including aquatic, sedimentary, and terrestrial habitats. The book also discusses approaches for assembling these lines of evidence for risk assessment purposes. The chapter authors have critically examined the peer-reviewed literature to identify and prioritize the knowledge gaps and to recommend future areas of research. The editors include a review of the genotoxic effects of the EMs and the cellular and molecular mechanisms underlying the toxicity of these chemicals. They also discuss the transport, transformation, and degradation pathways of these chemicals in the environment that underlie the potential hazardous impact and bioaccumulation of EMs in different terrestrial and aquatic ecological receptors. This information translates into practical applications for the environmental risk assessment of EM-contaminated sites and into recommendations for the sustainable use of defense installations.

Efroymson, Rebecca Ann [ORNL; Giffen, Neil R [ORNL; Morrill, Valerie [U.S. Army Yuma Proving Ground; Jenkins, Thomas [U.S. Corps of Engineers, Cold Regions Research & Engineering Laboratory

2009-04-01

387

Environmental fate of explosives  

Microsoft Academic Search

Waste disposal practices associated with military production of weapons, especially before and during World War II, have resulted in significant contamination of soils and ground water with high explosives such as TNT, RDX and HMX. Development of remediation and risk management strategies for these contaminated sites as well as development of approaches for sustainable use of active training and weapons

Judith C. Pennington; James M. Brannon

2002-01-01

388

Explosions: A Conference to  

E-print Network

Winds, Bubbles, & Explosions: A Conference to Honour John Dyson. Pátzcuaro, Michoacán, México, 9 spectra for analysis com­ puted with WMBASIC code (Pauldrach, Ho#­ man, Lennon 2001), and with Hillier Physics & Astronomy, Johns Hopkins University, 3400 N.Charles Baltimore, MD21210, (bianchi

Bianchi, Luciana

389

CBC: Halifax Explosion  

NSDL National Science Digital Library

In the evening of December 6, 1917, a massive explosion rocked the harbor of the rapidly growing city of Halifax, Nova Scotia, located in eastern Canada. Caused by the collision of two ships (one of which was carrying a tremendous amount of explosive material), the explosion killed over 1500 people outright, and devastated the settlements around the area. Working with various historical groups, the Canadian Broadcasting Corporation has created this engrossing multimedia look into the events leading up to that dreadful incident, along with offering a broader historical perspective on the development of the city of Halifax and the aftermath of these tragic events. Starting from the main page, visitors will learn about Halifax's history, along with having the opportunity to view significant interactive features, such as maps of the area and recently-discovered archival footage of the city and its environs. The interactive features here are quite amazing, as visitors can view video clips of survivors' recollections, and watch footage of various commemoration activities associated with the explosion.

390

Gulf of Mexico Oil Spill - Landsat 5  

USGS Multimedia Gallery

On April 20, 2010, an explosion at an oil well in the Gulf of Mexico resulted in a major oil spill. Since then, emergency response efforts have been underway to cap the leaking well system and contain the growing oil slick before it reaches wildlife refuges, fisheries, and beaches along the southern...

2010-05-10

391

Hand held explosives detection system  

DOEpatents

The present invention is directed to a sensitive hand-held explosives detection device capable of detecting the presence of extremely low quantities of high explosives molecules, and which is applicable to sampling vapors from personnel, baggage, cargo, etc., as part of an explosives detection system.

Conrad, Frank J. (Albuquerque, NM)

1992-01-01

392

LSP EXPLOSIVE PACKAGES FRAGMENTATION STUDY  

E-print Network

ATM 1046 LSP EXPLOSIVE PACKAGES FRAGMENTATION STUDY Prepared by: ,11. 15. :n-~ G. B. Min Approved considerations the probability of fragments from an LSP explosive package striking the ALSEP Central Station Experiment requires that Explosive Charges be detonated on the luoar surface early in the ALSEP lunar mission

Rathbun, Julie A.

393

Dynamic Investigation Test-rig on hAptics (DITA)  

NASA Astrophysics Data System (ADS)

Research on tactile sensitivity has been conducted since the last century and many devices have been proposed to study in detail this sense through experimental tests. The sense of touch is essential in every-day life of human beings, but it can also play a fundamental role for the assessment of some neurological disabilities and pathologies. In fact, the level of tactile perception can provide information on the health state of the nervous system. In this paper, authors propose the design and development of a novel test apparatus, named DITA (Dynamic Investigation Test-rig on hAptics), aiming to provide the measurement of the tactile sensitivity trough the determination of the Just Noticeable Difference (JND) curve of a subject. The paper reports the solution adopted for the system design and the results obtained on the set of experiments carried out on volunteers.

Cannella, F.; Scalise, L.; Olivieri, E.; Memeo, M.; Caldwell, D. G.

2013-09-01

394

Test Results From a High Power Linear Alternator Test Rig  

NASA Technical Reports Server (NTRS)

Stirling cycle power conversion is an enabling technology that provides high thermodynamic efficiency but also presents unique challenges with regard to electrical power generation, management, and distribution. The High Power Linear Alternator Test Rig (HPLATR) located at the NASA Glenn Research Center (GRC) in Cleveland, Ohio is a demonstration test bed that simulates electrical power generation from a Stirling engine driven alternator. It implements the high power electronics necessary to provide a well regulated DC user load bus. These power electronics use a novel design solution that includes active rectification and power factor control, active ripple suppression, along with a unique building block approach that permits the use of high voltage or high current alternator designs. This report describes the HPLATR, the test program, and the operational results.

Birchenough, Arthur G.; Hervol, David S.; Gardner, Brent G.

2010-01-01

395

Hoisting and rigging of critical components and related equipment  

SciTech Connect

This standard covers hoisting and rigging of large coolant system components such as pumps and heat exchangers, fuel elements, and other critical components, and also of any materials, equipment, or supplies handled over, in, or around spaces in which such critical items are located. The standard specifies minimal requirements for hoisting and materials handling equipment and for tackle; requirements, recommendations, and precautions in their use; and tests and inspections to verify that they are in good operating condition and can safely and reliably accommodate the loads involved under the operational conditions that will prevail. The purpose of this standard is to minimize the likelihood of physical damage to critical items due to dropping, upset, impact, or other accident.

Not Available

1980-01-01

396

V/STOL model fan stage rig design report  

NASA Technical Reports Server (NTRS)

A model single-stage fan with variable inlet guide vanes (VIGV) was designed to demonstrate efficient point operation while providing flow and pressure ratio modulation capability required for a V/STOL propulsion system. The fan stage incorporates a split-flap VIGV with an independently actuated ID flap to permit independent modulation of fan and core engine airstreams, a flow splitter integrally designed into the blade and vanes to completely segregate fan and core airstreams in order to maximize core stream supercharging for V/STOL operation, and an EGV with a variable leading edge fan flap for rig performance optimization. The stage was designed for a maximum flow size of 37.4 kg/s (82.3 lb/s) for compatibility with LeRC test facility requirements. Design values at maximum flow for blade tip velocity and stage pressure ratio are 472 m/s (1550 ft/s) and 1.68, respectively.

Cheatham, J. G.; Creason, T. L.

1983-01-01

397

Deposition stress effects on thermal barrier coating burner rig life  

NASA Technical Reports Server (NTRS)

A study of the effect of plasma spray processing parameters on the life of a two layer thermal barrier coating was conducted. The ceramic layer was plasma sprayed at plasma arc currents of 900 and 600 amps onto uncooled tubes, cooled tubes, and solid bars of Waspalloy in a lathe with 1 or 8 passes of the plasma gun. These processing changes affected the residual stress state of the coating. When the specimens were tested in a Mach 0.3 cyclic burner rig at 1130 deg C, a wide range of coating lives resulted. Processing factors which reduced the residual stress state in the coating, such as reduced plasma temperature and increased heat dissipation, significantly increased coating life.

Watson, J. W.; Levine, S. R.

1984-01-01

398

Advances in measuring techniques for turbine cooling test rigs  

NASA Technical Reports Server (NTRS)

Surface temperature distribution measurements for turbine vanes and blades were obtained by measuring the infrared energy emitted by the airfoil. The IR distribution can be related to temperature distribution by suitable calibration methods and the data presented in the form of isotherm maps. Both IR photographic and real time electro-optical methods are being investigated. The methods can be adapted to rotating as well as stationary targets, and both methods can utilize computer processing. Pressure measurements on rotating components are made with a rotating system incorporating 10 miniature transducers. A mercury wetted slip ring assembly was used to supply excitation power and as a signal transfer device. The system was successfully tested up to speeds of 9000 rpm and is now being adapted to measure rotating blade airflow quantities in a spin rig and a research engine.

Pollack, F. G.

1972-01-01

399

Burner rig alkali salt corrosion of several high temperature alloys  

NASA Technical Reports Server (NTRS)

The hot corrosion of five alloys was studied in cyclic tests in a Mach 0.3 burner rig into whose combustion chamber various aqueous salt solutions were injected. Three nickel-based alloys, a cobalt-base alloy, and an iron-base alloy were studied at temperatures of 700, 800, 900, and 1000 C with various salt concentrations and compositions. The relative resistance of the alloys to hot corrosion attack was found to vary with temperature and both concentration and composition of the injected salt solution. Results indicate that the corrosion of these alloys is a function of both the presence of salt condensed as a liquid on the surface and of the composition of the gas phases present.

Deadmore, D. L.; Lowell, C. E.

1977-01-01

400

Department of Mechanical Engineering/Material Science and Engineering Spring 2013 Project Name Development of Test Rig to  

E-print Network

Name ­ Development of Test Rig to Analyze Composite Materials for Pump Wear Rings Overview Flowserve was to build a test rig to replicate the wear a Flowserve pump shaft provides on a wear ring during pump start and the sponsor. Objectives The primary objective was to design and build a test rig for wear tests. Secondary

Demirel, Melik C.

401

Theory and Applications of Categories, Vol. 20, No. 14, 2008, pp. 497--503. CORE VARIETIES, EXTENSIVITY, AND RIG GEOMETRY  

E-print Network

, EXTENSIVITY, AND RIG GEOMETRY F. WILLIAM LAWVERE Abstract. The role of the Frobenius operations in analyzing finite spaces, as well as the extended algebraic geometry over rigs, depend partly on varieties (Birkho of a#ne spaces is extensive. Even within the category of those rigs where 1+1 = 1, not only

Chapman, Robin

402

Roles of RIG-I N-terminal tandem CARD and splice variant in TRIM25-mediated antiviral  

E-print Network

Roles of RIG-I N-terminal tandem CARD and splice variant in TRIM25-mediated antiviral signal and in the regu- lation of inflammatory responses. The cytosolic receptor retinoic acid-inducible gene-I (RIG. Upon viral infection, the N-terminal CARDs of RIG-I undergo the K63-linked ubiquitination induced

Myong, Sua

403

How to Rig Elections and Competitions Noam Hazon and Paul E. Dunne and Sarit Kraus and Michael Wooldridge  

E-print Network

How to Rig Elections and Competitions Noam Hazon and Paul E. Dunne and Sarit Kraus and Michael Wooldridge Abstract We investigate the extent to which it is possible to rig the agenda of an election to the complexity of finding and verifying agenda, we develop heuristics for agenda rigging, and investigate

Woolridge, Mike

404

Theory and Applications of Categories, Vol. 20, No. 14, 2008, pp. 497503. CORE VARIETIES, EXTENSIVITY, AND RIG GEOMETRY  

E-print Network

, EXTENSIVITY, AND RIG GEOMETRY F. WILLIAM LAWVERE Abstract. The role of the Frobenius operations in analyzing finite spaces, as well as the extended algebraic geometry over rigs, depend partly on varieties category of affine spaces is extensive. Even within the category of those rigs where 1+1 = 1, not only

Chapman, Robin

405

Cytosolic 59-Triphosphate Ended Viral Leader Transcript of Measles Virus as Activator of the RIG I-Mediated  

E-print Network

Cytosolic 59-Triphosphate Ended Viral Leader Transcript of Measles Virus as Activator of the RIG I into the cytosol as a 59- trisphosphate ended RNA. The use of a human cell line expressing a debilitated RIG-I molecule, together with overexpression studies of wild type RIG-I, showed that the IFN-b induction by virus

Boyer, Edmond

406

MINIMAL SOLUTIONS FOR DUAL MICROPHONE RIG SELF-CALIBRATION Simayijiang Zhayida, Simon Burgess, Yubin Kuang and Kalle Astrom  

E-print Network

MINIMAL SOLUTIONS FOR DUAL MICROPHONE RIG SELF-CALIBRATION Simayijiang Zhayida, Simon Burgess,simonb,yubin,kalle}@maths.lth.se ABSTRACT In this paper, we study minimal problems related to dual mi- crophone rig self-calibration using) if the microphone rigs lies in an affine space with different dimension than the sound sources. Solving

Lunds Universitet

407

Self-calibration of a stereo rig in a planar scene by data combination Joss Knight and Ian Reid  

E-print Network

Self-calibration of a stereo rig in a planar scene by data combination Joss Knight and Ian Reid cali- bration of our stereo rig, Yorick (Figure 1). Yorick is a pan- tilt head mounted on a mobile cameras. Most of the previous work in affine or metric self- calibration of stereo rigs, [1

Oxford, University of

408

Structural basis of double-stranded RNA recognition by the RIG-I like receptor MDA5  

E-print Network

Structural basis of double-stranded RNA recognition by the RIG-I like receptor MDA5 Xiaojun Li a c t RIG-I, MDA5 and LGP2 are cytosolic pattern recognition receptors detecting single-stranded or double- stranded RNA in virally infected cells. The activation of RIG-I or MDA5 stimulates the secretion

Strong, Roland K.

409

Associate editor: S. Pestka Functions of the cytoplasmic RNA sensors RIG-I and MDA-5: Key regulators of  

E-print Network

Associate editor: S. Pestka Functions of the cytoplasmic RNA sensors RIG-I and MDA-5: Key York, NY, USA a b s t r a c ta r t i c l e i n f o Keywords: Antiviral innate immunity MDA-5 RIG been identified, which comprises the cytoplasmic sensors of viral nucleic acids, including MDA-5, RIG

DeSalle, Rob

410

Study of Human RIG-I Polymorphisms Identifies Two Variants with an Opposite Impact on the Antiviral  

E-print Network

Study of Human RIG-I Polymorphisms Identifies Two Variants with an Opposite Impact on the Antiviral Abstract Background: RIG-I is a pivotal receptor that detects numerous RNA and DNA viruses. Thus, its on RIG-I single-nucleotide polymorphisms (SNPs) presenting a functional impact on the host response

Paris-Sud XI, Université de

411

Engine-Scale Combustor Rig Designed, Fabricated, and Tested for Combustion Instability Control Research  

NASA Technical Reports Server (NTRS)

Low-emission combustor designs are prone to combustor instabilities. Because active control of these instabilities may allow future combustors to meet both stringent emissions and performance requirements, an experimental combustor rig was developed for investigating methods of actively suppressing combustion instabilities. The experimental rig has features similar to a real engine combustor and exhibits instabilities representative of those in aircraft gas turbine engines. Experimental testing in the spring of 1999 demonstrated that the rig can be tuned to closely represent an instability observed in engine tests. Future plans are to develop and demonstrate combustion instability control using this experimental combustor rig. The NASA Glenn Research Center at Lewis Field is leading the Combustion Instability Control program to investigate methods for actively suppressing combustion instabilities. Under this program, a single-nozzle, liquid-fueled research combustor rig was designed, fabricated, and tested. The rig has many of the complexities of a real engine combustor, including an actual fuel nozzle and swirler, dilution cooling, and an effusion-cooled liner. Prior to designing the experimental rig, a survey of aircraft engine combustion instability experience identified an instability observed in a prototype engine as a suitable candidate for replication. The frequency of the instability was 525 Hz, with an amplitude of approximately 1.5-psi peak-to-peak at a burner pressure of 200 psia. The single-nozzle experimental combustor rig was designed to preserve subcomponent lengths, cross sectional area distribution, flow distribution, pressure-drop distribution, temperature distribution, and other factors previously found to be determinants of burner acoustic frequencies, mode shapes, gain, and damping. Analytical models were used to predict the acoustic resonances of both the engine combustor and proposed experiment. The analysis confirmed that the test rig configuration and engine configuration had similar longitudinal acoustic characteristics, increasing the likelihood that the engine instability would be replicated in the rig. Parametric analytical studies were performed to understand the influence of geometry and condition variations and to establish a combustion test plan. Cold-flow experiments verified that the design values of area and flow distributions were obtained. Combustion test results established the existence of a longitudinal combustion instability in the 500-Hz range with a measured amplitude approximating that observed in the engine. Modifications to the rig configuration during testing also showed the potential for injector independence. The research combustor rig was developed in partnership with Pratt & Whitney of West Palm Beach, Florida, and United Technologies Research Center of East Hartford, Connecticut. Experimental testing of the combustor rig took place at United Technologies Research Center.

DeLaat, John C.; Breisacher, Kevin J.

2000-01-01

412

Comparison of an Inductance In-Line Oil Debris Sensor and Magnetic Plug Oil Debris Sensor  

NASA Technical Reports Server (NTRS)

The objective of this research was to compare the performance of an inductance in-line oil debris sensor and magnetic plug oil debris sensor when detecting transmission component health in the same system under the same operating conditions. Both sensors were installed in series in the NASA Glenn Spiral Bevel Gear Fatigue Rig during tests performed on 5 gear sets (pinion/gear) when different levels of damage occurred on the gear teeth. Results of this analysis found both the inductance in-line oil debris sensor and magnetic plug oil debris sensor have benefits and limitations when detecting gearbox component damage.

Dempsey, Paula J.; Tuck, Roger; Showalter, Stephen

2012-01-01

413

USP21 negatively regulates antiviral response by acting as a RIG-I deubiquitinase  

PubMed Central

Lys63-linked polyubiquitination of RIG-I is essential in antiviral immune defense, yet the molecular mechanism that negatively regulates this critical step is poorly understood. Here, we report that USP21 acts as a novel negative regulator in antiviral responses through its ability to bind to and deubiquitinate RIG-I. Overexpression of USP21 inhibited RNA virus–induced RIG-I polyubiquitination and RIG-I–mediated interferon (IFN) signaling, whereas deletion of USP21 resulted in elevated RIG-I polyubiquitination, IRF3 phosphorylation, IFN-?/? production, and antiviral responses in MEFs in response to RNA virus infection. USP21 also restricted antiviral responses in peritoneal macrophages (PMs) and bone marrow–derived dendritic cells (BMDCs). USP21-deficient mice spontaneously developed splenomegaly and were more resistant to VSV infection with elevated production of IFNs. Chimeric mice with USP21-deficient hematopoietic cells developed virus-induced splenomegaly and were more resistant to VSV infection. Functional comparison of three deubiquitinases (USP21, A20, and CYLD) demonstrated that USP21 acts as a bona fide RIG-I deubiquitinase to down-regulate antiviral response independent of the A20 ubiquitin-editing complex. Our studies identify a previously unrecognized role for USP21 in the negative regulation of antiviral response through deubiquitinating RIG-I. PMID:24493797

Fan, Yihui; Mao, Renfang; Yu, Yang; Liu, Shangfeng; Shi, Zhongcheng; Cheng, Jin; Zhang, Huiyuan; An, Lei; Zhao, Yanling; Xu, Xin; Chen, Zhenghu; Kogiso, Mari; Zhang, Dekai; Zhang, Hong; Zhang, Pumin; Jung, Jae U.; Li, Xiaonan

2014-01-01

414

Relationships between rigging set-up, anthropometry, physical capacity, rowing kinematics and rowing performance.  

PubMed

The general aim of this study was to examine the relations between rigging set up, anthropometry, physical capacity, rowing kinematics and rowing performance. Fifteen elite single scullers participated in the experiment. Each sculler's preferred rigging set-up was quantified using measurements that included oar length, inboard, span, gearing ratio, swivel-seat height, footstretcher-seat height and distance, and footstretcher angles. Rowing performance was assessed using 2000 m race times from the Australian National Selection trials. Selected anthropometric, physical capacity and kinematic variables were also quantified. Several rigging variables were significantly correlated with each other, and with various anthropometric, physical capacity and kinematic variables. The individual variables that had the highest correlations with race time were 2 km ergometer time (r=0.90), mass (r=-0.87), height (r=-0.86), oar length (r = -0.85) and strength (r = -0.84). Overall results of this study indicated that the fastest rowers tend to be the largest and strongest, and that these larger body dimensions are reflected in the choice of rigging settings. Rigging set-up by itself should not be considered to be a primary determinant of rowing performance, but rather a consequence of faster rowers being larger and stronger and scaling their rigging set-up accordingly. To maximise rowing performance it appears important to tune the rigging of the boat to match the rower's size and strength. PMID:15552582

Barrett, R S; Manning, J M

2004-07-01

415

Fan Rig Noise Spectral Correction for NASA 9'x 15' Low-Speed Wind Tunnel  

NASA Technical Reports Server (NTRS)

Aircraft engine noise research and development depends on the ability to study and predict the noise created by each engine component in isolation. Fan noise testing, however, requires a significant support system including a drive mechanism to turn the fan, a device to smooth the flow into the fan, and a stand to raise the fan off the ground each of which has the potential to create its own noise. A methodology was therefore developed to improve the data quality for the 9x15 Low Speed Wind Tunnel (LSWT) at the NASA Glenn Research Center that identifies three noise sources: fan noise, jet noise, and rig noise. The jet noise and rig noise was then measured by mounting a scale model of the 9x15 LSWT setup in a jet rig to simulate everything except the rotating machinery that characterizes fan noise. The data showed that the spectra measured in the LSWT has a strong rig noise component at frequencies as high as 3 kHz depending on the fan and speed. The jet noise was determined to be significantly lower than the rig noise. A mathematical model for the rig noise was then developed using a multi-dimensional least squares fit to the rig noise data. This allows the rig noise to be subtracted or removed, depending on the amplitude of the rig noise relative to the fan noise, at any given frequency, observer angle, or nozzle pressure ratio. The impact of isolating the fan noise with this method on spectra, overall power level (OAPWL), and Effective Perceived Noise Level (EPNL) is studied.

Schifer, Nick; Brown, Cliff

2007-01-01

416

Antiviral immunity via RIG-I-mediated recognition of RNA bearing 5'-diphosphates.  

PubMed

Mammalian cells possess mechanisms to detect and defend themselves from invading viruses. In the cytosol, the RIG-I-like receptors (RLRs), RIG-I (retinoic acid-inducible gene I; encoded by DDX58) and MDA5 (melanoma differentiation-associated gene 5; encoded by IFIH1) sense atypical RNAs associated with virus infection. Detection triggers a signalling cascade via the adaptor MAVS that culminates in the production of type I interferons (IFN-? and ?; hereafter IFN), which are key antiviral cytokines. RIG-I and MDA5 are activated by distinct viral RNA structures and much evidence indicates that RIG-I responds to RNAs bearing a triphosphate (ppp) moiety in conjunction with a blunt-ended, base-paired region at the 5'-end (reviewed in refs 1, 2, 3). Here we show that RIG-I also mediates antiviral responses to RNAs bearing 5'-diphosphates (5'pp). Genomes from mammalian reoviruses with 5'pp termini, 5'pp-RNA isolated from yeast L-A virus, and base-paired 5'pp-RNAs made by in vitro transcription or chemical synthesis, all bind to RIG-I and serve as RIG-I agonists. Furthermore, a RIG-I-dependent response to 5'pp-RNA is essential for controlling reovirus infection in cultured cells and in mice. Thus, the minimal determinant for RIG-I recognition is a base-paired RNA with 5'pp. Such RNAs are found in some viruses but not in uninfected cells, indicating that recognition of 5'pp-RNA, like that of 5'ppp-RNA, acts as a powerful means of self/non-self discrimination by the innate immune system. PMID:25119032

Goubau, Delphine; Schlee, Martin; Deddouche, Safia; Pruijssers, Andrea J; Zillinger, Thomas; Goldeck, Marion; Schuberth, Christine; Van der Veen, Annemarthe G; Fujimura, Tsutomu; Rehwinkel, Jan; Iskarpatyoti, Jason A; Barchet, Winfried; Ludwig, Janos; Dermody, Terence S; Hartmann, Gunther; Reis e Sousa, Caetano

2014-10-16

417

78 FR 42544 - Outer Continental Shelf (OCS), Gulf of Mexico (GOM), Oil and Gas Lease Sale, Western Planning...  

Federal Register 2010, 2011, 2012, 2013

...Multisale EIS) and the Gulf of Mexico OCS Oil and Gas Lease Sales: 2013-2014...the Deepwater Horizon explosion, oil spill, and response. The WPA Lease Sales...potential environmental effects of oil and natural gas leasing,...

2013-07-16

418

Influence of the Deep Water Horizon Oil Spill on Atmospheric Hydrocarbon Levels over the Gulf of Mexico  

NASA Astrophysics Data System (ADS)

The waters of the Gulf of Mexico recently were impacted negatively by the large oil spill that occurred after an explosion at the BP Deep Water Horizon rig on April 20, 2010. In response to this disaster, and out of concern for the multitude of chemical pollutants being emitted, we collected 96 air samples in the Gulf region aboard the 65 ft vessel “R/V Eugenie” during 20-23 May, 2010. Sample analysis was by high sensitivity gas chromatographic analysis with special attention to the presence of possible toxic components. Analysis of each canister included straight-chain saturated hydrocarbons from C1 (methane) to C12 (dodecane), aromatic hydrocarbons such as benzene and toluene, as well as higher molecular weight species. High levels of C5-C12 alkanes and cyclo-alkanes, typical of crude oil, were observed in the atmosphere downwind of the spill location. However, the most soluble components, especially methane and benzene, were largely absent from the near-surface atmosphere implying dissolution in the deep sea, where they could impact negatively oxygen levels.

Blake, N. J.; Barletta, B.; Meinardi, S.; Leifer, I.; Rowland, F. S.; Blake, D. R.

2010-12-01

419

The rigged Hilbert space approach to the Lippmann-Schwinger equation. Part I  

E-print Network

We exemplify the way the rigged Hilbert space deals with the Lippmann-Schwinger equation by way of the spherical shell potential. We explicitly construct the Lippmann-Schwinger bras and kets along with their energy representation, their time evolution and the rigged Hilbert spaces to which they belong. It will be concluded that the natural setting for the solutions of the Lippmann-Schwinger equation--and therefore for scattering theory--is the rigged Hilbert space rather than just the Hilbert space.

R. de la Madrid

2006-03-20

420

Structure and Dynamics of the Second CARD of Human RIG-I Provide Mechanistic Insights into Regulation of RIG-I Activation  

PubMed Central

SUMMARY RIG-I is a cytosolic sensor of viral RNA, comprised of two N-terminal CARDs followed by helicase and C-terminal regulatory domains (helicase-CTD). Viral RNA binds to the helicase-CTD and “exposes” the CARDs for downstream signaling. The role of the second CARD (CARD2) is essential as RIG-I activation requires dephosphorylation of Thr170 followed by ubiquitination at Lys172. Here, we present the solution structure and dynamics of human RIG-I CARD2. Surprisingly, we find that Thr170 is mostly buried. Parallel studies on the phosphomimetic T170E mutant suggest that the loss of function upon Thr170 phosphorylation is likely associated with changes in the CARD1–CARD2 interface that may prevent Lys172 ubiquitination and/or binding to free K63-linked polyubiquitin. We also demonstrate a strong interaction between CARD2 and the helicase-CTD, and show that mutations at the interface result in constitutive activation of RIG-I. Collectively, our data suggests a close interplay between phosphorylation, ubiquitination, and activation of human RIG-I, all mediated by CARD2. PMID:23063562

Ferrage, Fabien; Dutta, Kaushik; Nistal-Villan, Estanislao; Patel, Jenish R.; Sanchez-Aparicio, Maria T.; De Ioannes, Pablo; Buku, Angeliki; Aseguinolaza, Gloria Gonzalez; Garcia-Sastre, Adolfo; Aggarwal, Aneel K.

2012-01-01

421

Cast aluminized explosives (review)  

Microsoft Academic Search

This paper reviews the current status and future trends of aluminized explosives. The major focus is on cast compositions,\\u000a which encompass both the melt-cast trinitrotoluene (TNT) based and the slurry cast polymer-based compositions. Widely reported\\u000a RDX and HMX based aluminized compositions with TNT used as a binder are discussed in detail. Various researchers have suggested\\u000a a 15–20% Al content as

P. P. Vadhe; R. B. Pawar; R. K. Sinha; S. N. Asthana; A. Subhananda Rao

2008-01-01

422

[Explosive "Roman find"].  

PubMed

A case of a 40-year-old hobby archeologist is presented who searched for remains from Roman times. After finding an oblong, cylindrical object, he opened it with a saw to examine it, which triggered an explosion killing the man. The technical investigation of the remains showed that the find was actually a grenade from the 2nd World War. The autopsy findings and the results of the criminological investigation are presented. PMID:16529179

Stiel, Michael; Dettmeyer, Reinhard; Madea, Burkhard

2006-01-01

423

Methane Flux to the Atmosphere from the Deepwater Horizon Oil Leak  

Microsoft Academic Search

The unfortunate blowout at the BP Deepwater Horizon (DWH) oil rig on April 20, which killed 11 people, was releasing oil and methane at an average rate of 58,000 barrels per day into the deep ocean, until it was recently capped resulting in a total of 4.9 million barrels released (National Incident Command Report, 2010). The methane component of the

S. A. Yvon-Lewis; L. Hu; J. D. Kessler; F. Garcia Tigreros; E. W. Chan; M. Du

2010-01-01

424

Adhesion of explosives.  

PubMed

It is of increasing importance to understand how explosive particles adhere to surfaces in order to understand how to remove them for detection in airport or other security settings. In this study, adhesion forces between royal demolition explosive (cyclotrimethylenetrinitramine) (RDX), pentaerythritol tetranitrate (PETN), and trinitrotoluene (TNT) in their crystalline forms and aluminum coupons with three finishes, acrylic melamine (clear coating), polyester acrylic melamine (white coating) automotive finishes, and a green military-grade finish, were measured and modeled. The force measurements were performed using the atomic force microscopy (AFM)-based colloidal probe microscopy (CPM) method. Explosive particles were mounted on AFM cantilevers and repeatedly brought in and out of contact with the surfaces of interest while the required force needed to pull out of contact was recorded. An existing Matlab-based simulator was used to describe the observed adhesion force distributions, with excellent agreement. In these simulations, the measured topographies of the interacting surfaces were considered, although the geometries were approximated. The simulations were performed using a van der Waals force-based adhesion model and a composite effective Hamaker constant. It was determined that certain combinations of roughness on the interacting surfaces led to preferred particle-substrate orientations that produced extreme adhesion forces. PMID:23510004

Chaffee-Cipich, Michelle N; Sturtevant, Bryce D; Beaudoin, Stephen P

2013-06-01

425

Explosives signatures and analysis  

NASA Astrophysics Data System (ADS)

The challenge of sampling explosive materials for various high threat military and civilian operational scenarios requires the community to identify and exploit other chemical compounds within the mixtures that may be available to support stand-off detection techniques. While limited surface and vapor phase characterization of IEDs exist, they are insufficient to guide the future development and evaluation of field deployable explosives detection (proximity and standoff) capabilities. ECBC has conducted a limited investigation of three artillery ammunition types to determine what chemical vapors, if any, are available for sensing; the relative composition of the vapors which includes the more volatile compounds in munitions, i.e., plastersizers and binders; and the sensitivity needed detect these vapors at stand-off. Also in partnership with MIT-Lincoln Laboratory, we performed a background measurement campaign at the National Training Center to determine the baseline ambient amounts and variability of nitrates and nitro-ester compounds as vapors, particulates, and on surfaces; as well as other chemical compounds related to non-energetic explosive additives. Environmental persistence studies in contexts relevant to counter-IED sensing operations, such as surface residues, are still necessary.

Fountain, Augustus Way, III; Oyler, Jonathan M.; Ostazeski, Stanley A.

2008-04-01

426

Tracking responses to the 2010 Deepwater Horizon oil spill using trace elements in molluscan shells and tissues  

Microsoft Academic Search

Documenting the effects of modern stressors on coastal benthic marine communities requires a combination of baseline historical data and modern dynamic data. E.g., landfall of hydrocarbons from the 2010 Deepwater Horizon rig and well explosion in the Gulf of Mexico is impacting coastal areas long affected by natural seepage, as well as petroleum exploration and development. In Louisiana, exploration in

P. D. Roopnarine; L. Anderson; D. Roopnarine; D. P. Gillikin; D. Goodwin

2010-01-01

427

Explosion Heat and Metal Acceleration Ability of High Explosives  

NASA Astrophysics Data System (ADS)

Investigations of explosion heats of TNT and HMX show that in tests of unconfined charges the explosion products undergo intense secondary heating when approaching the wall of calorimetric bomb cavity. This secondary heating causes "re-freezing" the explosion products in conditions of low pressure. An inert metal casing whose mass is more than four times greater than that of explosive charge prevents the secondary heating of products to the "re-freezing" temperature and rules out a change in their composition. Filling of calorimetric bomb cavity before explosion with an inert gas produces an effect similar to that of charge casing. The value of explosion heat, measured under conditions that preclude "re-freezing" of explosion products can serve as a measure of the energy content of high explosive. With the use of this parameter a simple method for predicting explosive performance in Cylinder Test has been developed. The method is based on the assumption that the coefficient of conversion of the chemical energy to the kinetic energy depends on the volumetric mole number of gaseous products.

Makhov, M. N.

2004-07-01

428

Conflict of Interest that Led to the Gulf Oil Disaster  

Microsoft Academic Search

On April 20, 2010, British Petroleum’s Deepwater Horizon drilling rig in the Gulf of Mexico exploded, killing eleven people and spilling billions of gallons of oil into the gulf. In the days and weeks that followed, the media pointed to the Minerals Management Services (MMS), the regulatory agency responsible for managing offshore drilling, as being complicit with BP. The MMS

Peter J Honigsberg

2011-01-01

429

Airborne remote sensing for Deepwater Horizon oil spill emergency response  

Microsoft Academic Search

On April 28, 2010, the Environmental Protection Agency's (EPA) Airborne Spectral Photometric Environmental Collection Technology (ASPECT) aircraft was deployed to Gulfport, Mississippi to provide airborne remotely sensed air monitoring and situational awareness data and products in response to the Deepwater Horizon oil rig disaster. The ASPECT aircraft was released from service on August 9, 2010 after having flown over 75

Robert T. Kroutil; Sylvia S. Shen; Paul E. Lewis; David P. Miller; John Cardarelli; Mark Thomas; Timothy Curry; Paul Kudaraskus

2010-01-01

430

On the Relation between Rigging Inner Product and Master Constraint Direct Integral Decomposition  

E-print Network

Canonical quantisation of constrained systems with first class constraints via Dirac's operator constraint method proceeds by the thory of Rigged Hilbert spaces, sometimes also called Refined Algebraic Quantisation (RAQ). This method can work when the constraints form a Lie algebra. When the constraints only close with nontrivial structure functions, the Rigging map can no longer be defined. To overcome this obstacle, the Master Constraint Method has been proposed which replaces the individual constraints by a weighted sum of absolute squares of the constraints. Now the direct integral decomposition methods (DID), which are closely related to Rigged Hilbert spaces, become available and have been successfully tested in various situations. It is relatively straightforward to relate the Rigging Inner Product to the path integral that one obtains via reduced phase space methods. However, for the Master Constraint this is not at all obvious. In this paper we find sufficient conditions under which such a relation c...

Han, Muxin

2009-01-01

431

A test rig for the identification of rotordynamic coefficients of fluid film bearings  

E-print Network

A test rig and measurement procedure to identify the rotordynamic coefficients of generic fluid film bearing elements are described. The test apparatus allows the exchange of test articles without modifications to the basic design of the machine...

Robison, Lewis Miller

2012-06-07

432

Calibration and performance of a selective catalytic reduction (SCR) bench rig for NOx? emissions control  

E-print Network

A laboratory test rig was designed and built to easily test SCR (Selective Catalytic Reduction) technology. Equipped with three 6 kW heaters, connections for liquid N2 and an assortment of test gases, and a connection with ...

Castro Galnares, Sebastián (Castro Galnares Wright Paz)

2008-01-01

433

Penalty Functions for Automatic Rigging and Animation of 3D Characters Ilya Baran Jovan Popovic  

E-print Network

Penalty Functions for Automatic Rigging and Animation of 3D Characters Ilya Baran Jovan Popovi´c 1 in [Baran and Popovi´c 2007] for discrete optimization and for embedding refinement. We plan to release

Popovic, Jovan

434

NASA Lewis Research Center lean-, rich-burn materials test burner rig  

NASA Technical Reports Server (NTRS)

The lean-, rich-burn materials test burner rig at NASA LeRC is used to evaluate the high temperature environmental durability of aerospace materials. The rig burns jet fuel and pressurized air, and sample materials can be subjected to both lean-burn and rich-burn environments. As part of NASA's Enabling Propulsion Materials (EPM) program, an existing rig was adapted to simulate the rich-burn quick-quench lean-burn (RQL) combustor concept which is being considered for the HSCT (high speed civil transport) aircraft. RQL materials requirements exceed that of current superalloys, thus ceramic matrix composites (CMC's) emerged as the leading candidate materials. The performance of these materials in the quasi reducing environment of the rich-burn section of the RQL is of fundamental importance to materials development. This rig was developed to conduct such studies, and its operation and capabilities are described.

Stearns, C. A.; Robinson, R. C.

1994-01-01

435

Nucleotide sequences and modifications that determine RIG-I/RNA binding and signaling activities  

E-print Network

Cytoplasmic viral RNAs with 5? triphosphates (5?ppp) are detected by the RNA helicase RIG-I, initiating downstream signaling and alpha/beta interferon (IFN-?/?) expression that establish an antiviral state. We demonstrate ...

Urzi, Dina

436

The Feasibility of Natural Gas as a Fuel Source for Modern Land-Based Drilling Rigs  

E-print Network

The purpose of this study is to determine the feasibility of replacing diesel with natural gas as a fuel source for modern drilling rigs. More specifically, this thesis (1) establishes a control baseline by examining operational characteristics...

Nunn, Andrew Howard

2012-02-14

437

Method for forming an in situ oil shale retort with horizontal free faces  

DOEpatents

A method for forming a fragmented permeable mass of formation particles in an in situ oil shale retort is provided. A horizontally extending void is excavated in unfragmented formation containing oil shale and a zone of unfragmented formation is left adjacent the void. An array of explosive charges is formed in the zone of unfragmented formation. The array of explosive charges comprises rows of central explosive charges surrounded by a band of outer explosive charges which are adjacent side boundaries of the retort being formed. The powder factor of each outer explosive charge is made about equal to the powder factor of each central explosive charge. The explosive charges are detonated for explosively expanding the zone of unfragmented formation toward the void for forming the fragmented permeable mass of formation particles having a reasonably uniformly distributed void fraction in the in situ oil shale retort.

Ricketts, Thomas E. (Grand Junction, CO); Fernandes, Robert J. (Bakersfield, CA)

1983-01-01

438

Optical Instrumentation for Temperature and Velocity Measurements in Rig Turbines  

NASA Technical Reports Server (NTRS)

Non-intrusive optical measurement techniques have been examined in the context of developing robust instruments which can routinely yield data of engineering utility in high speed turbomachinery test rigs. The engineering requirements of such a measurement are presented. Of particular interest were approaches that provide both velocity and state-variable information in order to be able to completely characterize transonic flowfields. Consideration of all of the requirements lead to the selection of particle image velocimetry (PIV) for the approach to velocity measurement while laser induced fluorescence of oxygen (O2 LIF) appeared to offer the most promise for gas temperature measurement. A PIV system was developed and demonstrated on a transonic turbine stage in the MIT blowdown turbine facility. A comprehensive data set has been taken at one flow condition. Extensive calibration established the absolute accuracy of the velocity measurements to be 3-5 %. The O2 LIF proved less successful. Although accurate for low speed flows, vibrational freezing of O2 prevented useful measurements in the transonic, 300-600 K operating range of interest here.

Ceyhan, I.; dHoop, E. M.; Guenette, G. R.; Epstein, A. H.; Bryanston-Cross, P. J.

1998-01-01

439

Frozen rigging model of the energy dominated universe  

E-print Network

Composite rigging systems, involving membranes that meet on strings that meet on monopoles, arise naturally by the Kibble mechanism as topological defects in field theories involving spontaneous symmetry breaking. Such systems will tend to freeze out into static lattice type configurations with energy contribution ultimately be provided by the membranes. It has been suggested by Bucher and Spergel that on scales large compared with the relevant (interstellar separation) distance characterising the relevant mesh length, such a system may behave as a rigidity - stabilised solid, having an approximately isotropic stress energy tensor with negative pressure, as given by a polytropic index $\\gamma=w+1=1/3$. It has recently been shown that such a system can be rigid enough to be stable if the number of membranes meeting at a junction is even (though not if it is odd). Using as examples an approximately O(3) symmetric scalar field model that can provide an ``8 color'' (body centered) cubic lattice, and an approximate U(1)$\\times$ U(1) model offering a disordered ``5 color'' lattice, it is argued that such a mechanism can account naturally for the observed dark energy dominance of the universe, without ad hoc assumptions, other than that the relevant symmetry breaking phase transition should have occurred somewhere about the Kev energy range.

Brandon Carter

2004-12-28

440

Thermal barrier coatings: Burner rig hot corrosion test results  

NASA Technical Reports Server (NTRS)

A Mach 0.3 burner rig test program was conducted to examine the sensitivity of thermal barrier coatings to Na and V contaminated combustion gases simulating potential utility gas turbine environments. Coating life of the standard ZrO2-12Y2O3/Ni-16.2Cr-5.6Al-0.6Y NASA thermal barrier coating system which was developed for aircraft gas turbines was significantly reduced in such environments. Two thermal barrier coating systems, Ca2SiO4/Ni-16.2Cr-5.6Al-0.6Y and ZrO2-8Y2O3/Ni-16.4Cr-5.1Al-0.15Y and a less insulative cermet coating system, 50 volume percent MgO-50 volume percent Ni-19.6Cr-17.1Al-0.97Y/Ni-16.2Cr-5.6Al-0.6Y, were identified as having much improved corrosion resistance compared to the standard coating.

Hodge, P. E.; Stecura, S.; Gedwill, M. A.; Zaplatynsky, I.; Levine, S. R.

1978-01-01

441

Innate immunity induced by composition-dependent RIG-I recognition of Hepatitis C virus RNA  

PubMed Central

Innate immune defenses are essential for the control of virus infection and are triggered through host recognition of viral macromolecular motifs known as pathogen-associated molecular patterns (PAMPs) 1. Hepatitis C virus (HCV) is an RNA virus that replicates in the liver, and infects 200 million people 2. Infection is governed by hepatic immune defenses triggered by the cellular RIG-I helicase. RIG-I binds PAMP RNA and signals IRF-3 activation to induce the expression of ?/? interferon (IFN) and antiviral/interferon-stimulated genes (ISGs) that limit infection 3–10. Here we identified the poly-uridine motif of the HCV genome 3’ nontranslated region (NTR) as the PAMP substrate of RIG-I, and show that this and similar homopoly-uridine motifs present in the genome of RNA viruses is the chief feature of RIG-I recognition and immune triggering 8. 5’ terminal triphosphate on the PAMP RNA was necessary but not sufficient for RIG-I binding, which was primarily dependent upon homopolymeric ribonucleotide composition, linear structure and length. The HCV PAMP RNA stimulated RIG-I-dependent signaling to induce a hepatic innate immune response in vivo, and triggered IFN and ISG expression to suppress HCV infection in vitro. These results provide a conceptual advance by identifying homopoly-uridine motfis present in the genome of HCV and other RNA viruses as the PAMP substrate of RIG-I, and define immunogenic features of the PAMP/RIG-I interaction that could be utilized as an immune adjuvant for vaccine and immunotherapy approaches. PMID:18548002

Saito, Takeshi; Owen, David M.; Jiang, Fuguo; Marcotrigiano, Joseph; Gale, Michael

2010-01-01

442

Fully suspended, five-axis, three-magnetic-bearing dynamic spin rig with forced excitation  

Microsoft Academic Search

A significant advancement in the dynamic spin rig (DSR), i.e., the five-axis, three-magnetic-bearing DSR, is used to perform\\u000a vibration tests of turbomachinery blades and components under rotating and non-rotating conditions in a vacuum. The rig has\\u000a three magnetic bearings as its critical components: two heteropolar radial active magnetic bearings and a magnetic thrust\\u000a bearing. The bearing configuration allows full vertical

C. R. Morrison; A. Provenza; A. Kurkov; G. Montague; K. Duffy; O. Mehmed; D. Johnson; R. Jansen

2005-01-01

443

Innate immunity induced by composition-dependent RIG-I recognition of hepatitis C virus RNA  

Microsoft Academic Search

Innate immune defences are essential for the control of virus infection and are triggered through host recognition of viral macromolecular motifs known as pathogen-associated molecular patterns (PAMPs). Hepatitis C virus (HCV) is an RNA virus that replicates in the liver, and infects 200 million people worldwide. Infection is regulated by hepatic immune defences triggered by the cellular RIG-I helicase. RIG-I

Takeshi Saito; David M. Owen; Fuguo Jiang; Joseph Marcotrigiano; Michael Gale Jr.

2008-01-01

444

RIG-I-Mediated Antiviral Responses to Single-Stranded RNA Bearing 5'-Phosphates  

Microsoft Academic Search

Double-stranded RNA (dsRNA) produced during viral replication is believed to be the critical trigger for activation of antiviral immunity mediated by the RNA helicase enzymes retinoic acid-inducible gene I (RIG-I) and melanoma differentiation-associated gene 5 (MDA5). We showed that influenza A virus infection does not generate dsRNA and that RIG-I is activated by viral genomic single-stranded RNA (ssRNA) bearing 5'-phosphates.

Andreas Pichlmair; Oliver Schulz; Choon Ping Tan; Tanja I. Näslund; Peter Liljeström; Friedemann Weber; Caetano Reis e Sousa

2006-01-01

445

A spectral theory of linear operators on rigged Hilbert spaces under certain analyticity conditions  

E-print Network

A spectral theory of linear operators on rigged Hilbert spaces (Gelfand triplets) is developed under the assumptions that linear operators are perturbations of selfadjoint operators, and the spectral measures of the selfadjoint operators have analytic continuations outside the real axis. Basic tools of the usual spectral theory, such as spectra, resolvents and Riesz projections are extended to those defined on rigged Hilbert spaces. The results are applied to estimate exponential decays of the semigroups of linear operators.

Chiba, Hayato

2011-01-01

446

Mode localization results and laboratory demonstration techniques with a multi-pendulum rig  

E-print Network

MODE LOCALIZATION RESULTS AND LABORATORY DEMONSTRATION TECHNIQUES WITH A MULTI-PENDULUM RIG A Thesis by ROBERT KENNETH GERARD BOLLICH Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE August 1992 Major Subject: Mechanical Engineering MODE LOCALIZATION RESULTS AND LABORATORY DEMONSTRATION TECHNIQUES WITH A MULTI-PENDULUM RIG A Thesis by ROBERT KENNETH GERARD BOLLICH Approved...

Bollich, Robert Kenneth Gerard

2012-06-07

447

The tumour suppressor CYLD is a negative regulator of RIG-I-mediated antiviral response  

Microsoft Academic Search

On detecting viral RNAs, the RNA helicase retinoic acid-inducible gene I (RIG-I) activates the interferon regulatory factor 3 (IRF3) signalling pathway to induce type I interferon (IFN) gene transcription. How this antiviral signalling pathway might be negatively regulated is poorly understood. Microarray and bioinformatic analysis indicated that the expression of RIG-I and that of the tumour suppressor CYLD (cylindromatosis), a

Constantin S. Friedman; Marie Anne O'Donnell; Diana Legarda-Addison; Aylwin Ng; Washington B. Cardenas; Jacob S. Yount; Thomas M Moran; Christopher F Basler; Akihiko Komuro; Curt M. Horvath; Ramnik Xavier; Adrian T Ting

2008-01-01

448

Linear accelerator for explosive detection  

Microsoft Academic Search

A 14 MeV, S-band linear accelerator has been designed and built by Beta Development for use in the MIDEP explosive detection program at Titan\\/Spectron Division. The explosive detection technique utilizes photoneutron activation of the nitrogen which is an integral component in most commercial and military explosives. The accelerator was designed to be a small, high power, light weight, and portable

K. Whitham; R. C. Miller; H. Anamkath; J. R. Clifford; R. B. Miller; K. Habiger

1991-01-01

449

Introduction Explosions in evolution problems Numerical approximations Adaptive numerical scheme Stochastic Differential Equations with explosions  

E-print Network

Introduction Explosions in evolution problems Numerical approximations Adaptive numerical scheme Stochastic Differential Equations with explosions Pablo Groisman University of Buenos Aires Joint work with J Stochastic Differential Equations with explosions #12;Introduction Explosions in evolution problems Numerical

Groisman, Pablo

450

Low voltage nonprimary explosive detonator  

DOEpatents

A low voltage, electrically actuated, nonprimary explosive detonator is disclosed wherein said detonation is achieved by means of an explosive train in which a deflagration-to-detonation transition is made to occur. The explosive train is confined within a cylindrical body and positioned adjacent to low voltage ignition means have electrical leads extending outwardly from the cylindrical confining body. Application of a low voltage current to the electrical leads ignites a self-sustained deflagration in a donor portion of the explosive train which then is made to undergo a transition to detonation further down the train.

Dinegar, Robert H. (Los Alamos, NM); Kirkham, John (Newbury, GB2)

1982-01-01

451

Explosive scabbling of structural materials  

DOEpatents

A new approach to scabbling of surfaces of structural materials is disclosed. A layer of mildly energetic explosive composition is applied to the surface to be scabbled. The explosive composition is then detonated, rubbleizing the surface. Explosive compositions used must sustain a detonation front along the surface to which it is applied and conform closely to the surface being scabbled. Suitable explosive compositions exist which are stable under handling, easy to apply, easy to transport, have limited toxicity, and can be reliably detonated using conventional techniques.

Bickes, Jr., Robert W. (Albuquerque, NM); Bonzon, Lloyd L. (Albuquerque, NM)

2002-01-01

452

77 FR 45341 - Incidental Taking of Marine Mammals; Taking of Marine Mammals Incidental to the Explosive Removal...  

Federal Register 2010, 2011, 2012, 2013

...Marine Mammals; Taking of Marine Mammals Incidental to the Explosive Removal of Offshore Structures in the Gulf of Mexico AGENCY...a one-year LOA to take marine mammals incidental to the explosive removal of offshore oil and gas structures (EROS) in...

2012-07-31

453

78 FR 22517 - Incidental Taking of Marine Mammals; Taking of Marine Mammals Incidental to the Explosive Removal...  

Federal Register 2010, 2011, 2012, 2013

...Marine Mammals; Taking of Marine Mammals Incidental to the Explosive Removal of Offshore Structures in the Gulf of Mexico AGENCY...NMFS has issued LOAs to take marine mammals incidental to the explosive removal of offshore oil and gas structures (EROS) in...

2013-04-16

454

77 FR 16539 - Incidental Taking of Marine Mammals; Taking of Marine Mammals Incidental to the Explosive Removal...  

Federal Register 2010, 2011, 2012, 2013

...Marine Mammals; Taking of Marine Mammals Incidental to the Explosive Removal of Offshore Structures in the Gulf of Mexico AGENCY...issued one-year LOAs to take marine mammals incidental to the explosive removal of offshore oil and gas structures (EROS) in...

2012-03-21

455

78 FR 13865 - Incidental Taking of Marine Mammals; Taking of Marine Mammals Incidental to the Explosive Removal...  

Federal Register 2010, 2011, 2012, 2013

...Marine Mammals; Taking of Marine Mammals Incidental to the Explosive Removal of Offshore Structures in the Gulf of Mexico AGENCY...issued one-year LOAs to take marine mammals incidental to the explosive removal of offshore oil and gas structures (EROS) in...

2013-03-01

456

Explosions on the Sun  

NASA Astrophysics Data System (ADS)

I describe two of the most dynamic and highly energetic phenomena in the Solar System - these are the eruptions and flaring that occur on the Sun. They can release as much energy as 10 million volcanoes, and throw out material into the solar system with similar mass to Mount Everest! The theories of what can produce such an explosion are based around the magnetic field that confines the gas. These events can produce emission right across the electromagnetic spectrum. The status of our ability to predict these events is discussed.

Harra, Louise K.

2005-10-01

457

Paramyxovirus V Proteins Interact with the RNA Helicase LGP2 To Inhibit RIG-I-Dependent Interferon Induction  

PubMed Central

RIG-I and mda-5 are activated by viral RNA and stimulate type I interferon production. Laboratory of genetics and physiology 2 (LGP2) shares homology with RIG-I and mda-5 but lacks the CARD domains required for signaling. The V proteins of paramyxoviruses limit interferon induction by binding mda-5 and preventing its activation; however, they do not bind RIG-I and have not been considered inhibitors of RIG-I signaling. Here we uncover a novel mechanism of RIG-I inhibition in which the V protein of parainfluenzavirus type 5 (PIV5; formerly known as simian virus type 5 [SV5]) interacts with LGP2 and cooperatively inhibits induction by RIG-I ligands. A complex between RIG-I and LGP2 is observed in the presence of PIV5-V, and we propose that this complex is refractory to activation by RIG-I ligands. The V proteins from other paramyxoviruses also bind LGP2 and demonstrate LGP2-dependent inhibition of RIG-I signaling. This is significant, because it demonstrates a general mechanism for the targeting of the RIG-I pathway by paramyxoviruses. PMID:22301134

Childs, Kay; Randall, Richard

2012-01-01

458

Method of rubblization for in-situ oil shale processing  

NASA Technical Reports Server (NTRS)

A method that produces a uniformly rubblized oil shale bed of desirable porosity for underground, in-situ heat extraction of oil. Rubblization is the generation of rubble of various sized fragments. The method uses explosive loadings lying at different levels in adjacent holes and detonation of the explosives at different levels in sequence to achieve the fracturing and the subsequent expansion of the fractured oil shale into excavated rooms both above and below the hole pattern.

Yang, Lien C. (Inventor)

1985-01-01

459

Application program of CRUST-1 10km continental scientific drilling rig in SK-2 scientific drilling well  

NASA Astrophysics Data System (ADS)

SK-2 Well is located in DaQing city,where is site of the largest oil field in China,Heilongjiang province, north-east of China.The objective of SK-2 well is to obtain full cores of cretaceous formation in Song Liao basin,and to build the time tunnel of Cretaceous greenhouse climate change,and to clarify the causes,processes and results of the formations of DaQing oil field. This will ensure to achieve our ultimate goals,to test the CRUST-1 drilling rig and improve China's deep scientific drilling technology,to form the scientific drilling technology,method and system with independent intellectual property rights,and to provide technical knowledge and information for China's ten kilometers super-deep scientific drilling technical resources.SK-2 Well is at 6400 meter depth, where the drilling inclination is 90 degree and the continuous coring length is 3535 meter that from 2865 to 6400 meter,the recovery rate of the core is greater or equal to 95 percent with 100 millimeters core diameter and 3.9 degree per 100 meter geothermal gradient.The CRUST-1 rig is designated with special drilling equipment for continental scientific drilling combined to the oil drilling equipment ability with advanced geological drilling technology which is highly automatic and intelligent. CRUST-1 drilling ability is 10000 meter with the maximum hook load 700 tons, the total power is 4610 Kilowatt.CRUST-1 will be integrated with a complete set of automation equipment,including big torque hydraulic top drive,high accuracy automatic drilling rod feeding system, suspended automatic drill string discharge device,hydraulic intelligent iron roughneck,and hydraulic automatic catwalk to fully meet the drilling process requirements of SK-2.Designed with advanced drilling technique for 260 degree in the bottom of SK-2 well and hard rock,including the drilling tools of high temperature hydraulic hammer,high temperature resistance and high strength aluminum drill pipe,high temperature preparation of mud treatment and high temperature resistant cementing materials, and bionic bits,that is coupling bionic PDC tooth bit and diamond-impregnated bit for hard rock.All parts of CRUST-1 were successfully assembled along with the derrick and base lift and transported about 3456 kilometers from manufacture,GuangHan city in southwest China's Sichuan province,to the well site of SK-2 in end of 2013.SK-2 will be finished during next 4 years.

Sun, Youhong; Gao, Ke; Yu, Ping; Liu, Baochang; Guo, Wei; Ma, Yinlong; Yang, Yang

2014-05-01

460

Fire and explosion hazards to flora and fauna from explosives  

Microsoft Academic Search

Deliberate or accidental initiation of explosives can produce a range of potentially damaging fire and explosion effects. Quantification of the consequences of such effects upon the surroundings, particularly on people and structures, has always been of paramount importance. Information on the effects on flora and fauna, however, is limited, with probably the weakest area lying with fragmentation of buildings and

Roy Merrifield

2000-01-01

461

Evaluation of surface storage facilities for explosives, blasting agents and other explosive materials  

Microsoft Academic Search

The histories of recent and past magazine explosions were reviewed; present explosive storage conditions and practices were observed; and existing Federal regulations on explosive storage were examined. A recent increase in magazine explosion frequency must be attributed to a large increase in deliberate explosions; fires of various origins account for the remaining explosions of the past decade. During 1884-1926 several

J. Roth

1983-01-01

462

Explosive components facility certification tests  

SciTech Connect

Sandia National Laboratories has recently completed construction of a new Explosive Components Facility (ECF) that will be used for the research and development of advanced explosives technology. The ECF includes nine indoor firing pads for detonating explosives and monitoring the detonations. Department of Energy requirements for certification of this facility include detonation of explosive levels up to 125 percent of the rated firing pad capacity with no visual structural degradation resulting from the explosion. The Explosives Projects and Diagnostics Department at Sandia decided to expand this certification process to include vibration and acoustic monitoring at various locations throughout the building during these explosive events. This information could then be used to help determine the best locations for noise and vibration sensitive equipment (e.g. scanning electron microscopes) used for analysis throughout the building. This facility has many unique isolation features built into the explosive chamber and laboratory areas of the building that allow normal operation of other building activities during explosive tests. This paper discusses the design of this facility and the various types of explosive testing performed by the Explosives Projects and Diagnostics Department at Sandia. However, the primary focus of the paper is directed at the vibration and acoustic data acquired during the certification process. This includes the vibration test setup and data acquisition parameters, as well as analysis methods used for generating peak acceleration levels and spectral information. Concerns over instrumentation issues such as the choice of transducers (appropriate ranges, resonant frequencies, etc.) and measurements with long cable lengths (500 feet) are also discussed.

Dorrell, L.; Johnson, D. [Sandia National Labs., Albuquerque, NM (United States)

1995-08-01

463

Laser machining of explosives  

DOEpatents

The invention consists of a method for machining (cutting, drilling, sculpting) of explosives (e.g., TNT, TATB, PETN, RDX, etc.). By using pulses of a duration in the range of 5 femtoseconds to 50 picoseconds, extremely precise and rapid machining can be achieved with essentially no heat or shock affected zone. In this method, material is removed by a nonthermal mechanism. A combination of multiphoton and collisional ionization creates a critical density plasma in a time scale much shorter than electron kinetic energy is transferred to the lattice. The resulting plasma is far from thermal equilibrium. The material is in essence converted from its initial solid-state directly into a fully ionized plasma on a time scale too short for thermal equilibrium to be established with the lattice. As a result, there is negligible heat conduction beyond the region removed resulting in negligible thermal stress or shock to the material beyond a few microns from the laser machined surface. Hydrodynamic expansion of the plasma eliminates the need for any ancillary techniques to remove material and produces extremely high quality machined surfaces. There is no detonation or deflagration of the explosive in the process and the material which is removed is rendered inert.

Perry, Michael D. (Livermore, CA); Stuart, Brent C. (Fremont, CA); Banks, Paul S. (Livermore, CA); Myers, Booth R. (Livermore, CA); Sefcik, Joseph A. (Tracy, CA)

2000-01-01

464

Structural basis of RNA recognition and activation by innate immune receptor RIG-I  

SciTech Connect

Retinoic-acid-inducible gene-I (RIG-I; also known as DDX58) is a cytoplasmic pathogen recognition receptor that recognizes pathogen-associated molecular pattern (PAMP) motifs to differentiate between viral and cellular RNAs. RIG-I is activated by blunt-ended double-stranded (ds)RNA with or without a 5'-triphosphate (ppp), by single-stranded RNA marked by a 5'-ppp and by polyuridine sequences. Upon binding to such PAMP motifs, RIG-I initiates a signalling cascade that induces innate immune defences and inflammatory cytokines to establish an antiviral state. The RIG-I pathway is highly regulated and aberrant signalling leads to apoptosis, altered cell differentiation, inflammation, autoimmune diseases and cancer. The helicase and repressor domains (RD) of RIG-I recognize dsRNA and 5'-ppp RNA to activate the two amino-terminal caspase recruitment domains (CARDs) for signalling. Here, to understand the synergy between the helicase and the RD for RNA binding, and the contribution of ATP hydrolysis to RIG-I activation, we determined the structure of human RIG-I helicase-RD in complex with dsRNA and an ATP analogue. The helicase-RD organizes into a ring around dsRNA, capping one end, while contacting both strands using previously uncharacterized motifs to recognize dsRNA. Small-angle X-ray scattering, limited proteolysis and differential scanning fluorimetry indicate that RIG-I is in an extended and flexible conformation that compacts upon binding RNA. These results provide a detailed view of the role of helicase in dsRNA recognition, the synergy between the RD and the helicase for RNA binding and the organization of full-length RIG-I bound to dsRNA, and provide evidence of a conformational change upon RNA binding. The RIG-I helicase-RD structure is consistent with dsRNA translocation without unwinding and cooperative binding to RNA. The structure yields unprecedented insight into innate immunity and has a broader impact on other areas of biology, including RNA interference and DNA repair, which utilize homologous helicase domains within DICER and FANCM.

Jiang, Fuguo; Ramanathan, Anand; Miller, Matthew T.; Tang, Guo-Qing; Gale, Jr., Michael; Patel, Smita S.; Marcotrigiano, Joseph (Rutgers); (RWJ-Med); (UW-MED)

2012-05-29

465

Explosive Plane-Wave Lens.  

National Technical Information Service (NTIS)

An explosive plane-wave air lens which enables a spherical wave form to be converted to a planar wave without the need to specially machine or shape explosive materials is described. A disc-shaped impactor having a greater thickness at its center than aro...

S. P. Marsh

1987-01-01

466

Corona discharge initiated mine explosions  

Microsoft Academic Search

Strong circumstantial evidence suggests that lightning has initiated methane explosions in abandoned and sealed areas of underground coal mines. The Mine Safety and Health Administration (MSHA) investigated several of these occurrences within recent years. The investigated explosions occurred at significant depths, ranging from 700 ft to 1200 ft. Data from the national lightning detection network indicated a strong correlation between

H. K. Sacks; Thomas Novak

2004-01-01

467

A primer on explosives costs  

Microsoft Academic Search

There are a multitude of cost centers in the typical coal mine, and almost as many ways to calculate their individual and collective effect on the bottom line. The costs of explosives is, in some ways, very difficult to determine without consideration of drilling, loading, hauling and breaking costs. Saving a nickel in explosive costs, for example, could end up

Paddock

1987-01-01

468

Nonterrorist suicidal deaths involving explosives.  

PubMed

Suicidal deaths involving explosives unconnected to terrorism are rare. The investigation of deaths from explosive devices requires a multidisciplinary collaborative effort, as demonstrated in this study. Reported are 2 cases of nonterrorist suicidal explosive-related deaths with massive craniocerebral destruction. The first case involves a 20-year-old man who was discovered in the basement apartment of his father's home seconds after an explosion. At the scene investigators recovered illegal improvised power-technique explosive devices, specifically M-100s, together with the victim's handwritten suicide note. The victim exhibited extensive craniofacial injuries, which medicolegal officials attributed to the decedent's intentionally placing one of these devices in his mouth. The second case involves a 46-year-old man who was found by his wife at his home. In the victim's facial wound, investigators recovered portions of a detonator blasting cap attached to electrical lead wires extending to his right hand. A suicide note was discovered at the scene. The appropriate collection of physical evidence at the scene of the explosion and a detailed examination of the victim's history is as important as documentation of injury patterns and recovery of trace evidence at autopsy. A basic understanding of the variety of explosive devices is also necessary. This investigatory approach greatly enhances the medicolegal death investigator's ability to reconstruct the fatal event as a means of separating accidental and homicidal explosive-related deaths from this uncommon form of suicide. PMID:12773843

Shields, Lisa B E; Hunsaker, Donna M; Hunsaker, John C; Humbert, Karl A

2003-06-01

469

Explosives Detection for Aviation Security  

Microsoft Academic Search

The threat of terrorism against commercial aviation has received much attention in the past few years. In response, new ways to detect explosives and to combine techniques based on different phenomena into integrated security systems are being developed to improve aviation security. Several leading methods for explosives and weapons detection are presented.

Anthony Fainberg

1992-01-01

470

Change in the length of the middle section of the Chandeleur Islands oil berm, November 17, 2010, through September 6, 2011  

USGS Publications Warehouse

On April 20, 2010, an explosion on the Deepwater Horizon oil rig drilling at the Macondo Prospect site in the Gulf of Mexico resulted in a marine oil spill that continued to flow through July 15, 2010. One of the affected areas was the Breton National Wildlife Refuge, which consists of a chain of low-lying islands, including Breton Island and the Chandeleur Islands, and their surrounding waters. The island chain is located approximately 115-150 kilometers north-northwest of the spill site. A sand berm was constructed seaward of, and on, the island chain. Construction began at the northern end of the Chandeleur Islands in June 2010 and ended in April 2011. The berm consisted of three distinct sections based on where the berm was placed relative to the islands. The northern section of the berm was built in open water on a submerged portion of the Chandeleur Islands platform. The middle section was built approximately 70-90 meters seaward of the Chandeleur Islands. The southern section was built on the islands' beaches. Repeated Landsat and SPOT satellite imagery and airborne lidar were used to observe the disintegration of the berm over time. The methods used to analyze the remotely sensed data and the resulting, derived data for the middle section are described in this report.

Plant, N.G.; Guy, K.K.

2013-01-01

471

The Scaled Thermal Explosion Experiment  

SciTech Connect

We have developed the Scaled Thermal Explosion Experiment (STEX) to provide a database of reaction violence from thermal explosion for explosives of interest. Such data are needed to develop, calibrate, and validate predictive capability for thermal explosions using simulation computer codes. A cylinder of explosive 25, 50 or 100 mm in diameter, is confined in a steel cylinder with heavy end caps, and heated under controlled conditions until reaction. Reaction violence is quantified through non-contact micropower impulse radar measurements of the cylinder wall velocity and by strain gauge data at reaction onset. Here we describe the test concept, design and diagnostic recording, and report results with HMX- and RDX-based energetic materials.

Wardell, J F; Maienschein, J L

2002-07-05

472

Providing emergency medical care to offshore oil and gas platforms in the Gulf of Mexico using telemedicine  

Microsoft Academic Search

UTMB is developing with industrial partners the '24\\/7 telemedicine triage project' to provide emergency medical care to offshore oil and gas rigs and platforms in the Gulf of Mexico. The oil and gas industry is second only to the US department of defense in the number of employees stationed in remote areas. Providing medical care to such populations is logistically

Anis Bouabene

2002-01-01

473

Single-Shot Extrinsic Calibration of a Generically Configured RGB-D Camera Rig from Scene Constraints  

E-print Network

Single-Shot Extrinsic Calibration of a Generically Configured RGB-D Camera Rig from Scene-shot, correspondence-free method to extrinsically calibrate a generical- ly configured RGB-D camera rig. We formulate-mail:hongdong.li@anu.edu.au �e-mail:henry.gardner@anu.edu.au �e-mail:jiayunde@bit.edu.cn Figure 1: A customized RGB-D camera rig

Li, Hongdong

474

ROLLING ELEMENT BEARING FAULT DIAGNOSIS IN ROTATING MACHINES OF OIL EXTRACTION RIGS  

Microsoft Academic Search

This paper presents vibration analysis techniques for fault detection in rotating machines. Rolling element bearing defects inside a motor pump are the subject of study. Signal processing techniques, like frequency filters, Hilbert tra ns- form, and spectral analysis are used to extract features use d later as a base to classify the condition of machines. Also, pattern recognition techniques are

E. Mendel; T. W. Rauber; F. M. Varej; R. J. Batista

2009-01-01

475

NASA Spinoff Article: Automated Procedures To Improve Safety on Oil Rigs  

NASA Technical Reports Server (NTRS)

On May 11th, 2013, two astronauts emerged from the interior of the International Space Station (ISS) and worked their way toward the far end of spacecraft. Over the next 51/2 hours, the two replaced an ammonia pump that had developed a significant leak a few days before. On the ISS, ammonia serves the vital role of cooling components-in this case, one of the station's eight solar arrays. Throughout the extravehicular activity (EVA), the astronauts stayed in constant contact with mission control: every movement, every action strictly followed a carefully planned set of procedures to maximize crew safety and the chances of success. Though the leak had come as a surprise, NASA was prepared to handle it swiftly thanks in part to the thousands of procedures that have been written to cover every aspect of the ISS's operations. The ISS is not unique in this regard: Every NASA mission requires well-written procedures-or detailed lists of step-by-step instructions-that cover how to operate equipment in any scenario, from normal operations to the challenges created by malfunctioning hardware or software. Astronauts and mission control train and drill extensively in procedures to ensure they know what the proper procedures are and when they should be used. These procedures used to be exclusively written on paper, but over the past decade, NASA has transitioned to digital formats. Electronic-based documentation simplifies storage and use, allowing astronauts and flight controllers to find instructions more quickly and display them through a variety of media. Electronic procedures are also a crucial step toward automation: once instructions are digital, procedure display software can be designed to assist in authoring, reviewing, and even executing them.

Garud, Sumedha

2013-01-01

476

Design, fabrication and testing of a bearing test rig and preliminary studies on oil mist lubrication  

E-print Network

of the test bearings with variation of speed. . . . 38 LIST OF TABLES TABLE Page Ltp life calculated for different load and speed combinations for 7012C high precision angular contact ball bearing. . . . . . . . . . . . ?. , . . . 27 Load and speed... of lubrication systems, load and speed on the dependent variables, in which we are mostly interested. Two new high precision 60 mm diameter angular contact ball bearings (BRG1 and BRG2) are used in this experiment. The difference between the two test bearings...

Shamim, Abdus

2012-06-07

477

75 FR 65309 - National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling  

Federal Register 2010, 2011, 2012, 2013

...Commission on the BP Deepwater Horizon Oil Spill and Offshore...Commission on the BP Deepwater Horizon Oil Spill and Offshore...root cause of the BP Deepwater Horizon explosion, fire...investigation into the Macondo well blowout....

2010-10-22

478

Explosion of chaotic bubbling  

NASA Astrophysics Data System (ADS)

We have studied a saddle-node bifurcation/explosion of air bubble formation driven by a sound wave, whose amplitude is the control parameter. The bubbles are formed in a nozzle submerged in a water/glycerol solution inside a cylindrical tube, and the sound wave is tuned to the air column above the fluid. The nonlinear interaction between sound wave and the fluid oscillations, caused by the air bubbles passage through the liquid, results in a route to chaos via quasi-periodicity, with some resonant states characterized by the rational winding numbers W= fs/ fb, where fs is the sound wave frequency and fb is the bubbling rate. We also have shown that the bubble dynamics is similar to the one observed in the two-dimensional circle map.

Tufaile, A.; Reyes, M. B.; Sartorelli, J. C.

2002-05-01

479

On the violence of thermal explosion in solid explosives  

SciTech Connect

Heavily confined cylinders of octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX) and triaminotrinitrobenzene (TATB) were heated at rates varying from 2 C/min to 3.3 C/h. Fourteen of the cylinders were hollow, and inner metallic liners with small heaters attached were used to produce uniform temperatures just prior to explosion. A complex thermocouple pattern was used to measure the temperature history throughout the charge and to determine the approximate location where the runaway exothermic reaction first occurred. The violence of the resulting explosion was measured using velocity pin arrays placed inside and outside of the metal confinement cylinders, flash x-rays, overpressure gauges, and fragment collection techniques. Five cylinders were intentionally detonated for violence comparisons. The measured temperature histories, times to explosion, and the locations of first reaction agreed closely with those calculated by a two-dimensional heat transfer code using multistep chemical decomposition models. The acceleration of the confining metal cylinders by the explosion process was accurately simulated using a two-dimensional pressure dependent deflagration reactive flow hydrodynamic mode. The most violent HMX thermal explosions gradually accelerated their outer cases to velocities approaching those of intentional detonations approximately 120 {micro}m after the onset of explosion. The measured inner cylinder collapse velocities from thermal explosions were considerably lower than those produced by detonations. In contrast to the HMX thermal reactions, no violent thermal explosions were produced by the TATB-based explosive LX-17. A heavily confined, slowly heated LX-17 test produced sufficient pressure to cause a 0.1 cm bend in a 2 cm thick steel plate.

Chidester, S.K.; Tarver, C.M.; Green, L.G.; Urtiew, P.A. [Lawrence Livermore National Lab., CA (United States). Defense Technologies Engineering Div.] [Lawrence Livermore National Lab., CA (United States). Defense Technologies Engineering Div.

1997-07-01

480

Thermochemistry of mixed explosives  

SciTech Connect

In order to predict thermal hazards of high-energy materials, accurate kinetics constants must be determined. Predictions of thermal hazards for mixtures of high-energy materials require measurements on the mixtures, because interactions among components are common. A differential-scanning calorimeter (DSC) can be used to observe rate processes directly, and isothermal methods enable detection of mechanism changes. Rate-controlling processes will change as components of a mixture are depleted, and the correct depletion function must be identified for each specific stage of a complex process. A method for kinetics measurements on mixed explosives can be demonstrated with Composition B is an approximately 60/40 mixture of RDX and TNT, and is an important military explosive. Kinetics results indicate that the mator process is the decomposition of RDX in solution in TNT with a perturbation caused by interaction between the two components. It is concluded that a combination of chemical kinetics and experimental self-heating procedures provides a good approach to the production of predictive models for thermal hazards of high-energy materials. Systems involving more than one energy-contributing component can be studied. Invalid and dangerous predictive models can be detected by a failure of agreement between prediction and experiment at a specific size, shape, and density. Rates of thermal decomposition for Composition B appear to be modeled adequately for critical-temperature predictions with the following kinetics constants: E = 180.2 kJ mole/sup -1/ and Z = 4.62 X 10/sup 16/ s/sup -1/.

Janney, J.L.; Rogers, R.N.

1982-01-01

481

The regulatory domain of the RIG-I family ATPase LGP2 senses double-stranded RNA  

PubMed Central

RIG-I and MDA5 sense cytoplasmic viral RNA and set-off a signal transduction cascade, leading to antiviral innate immune response. The third RIG-I-like receptor, LGP2, differentially regulates RIG-I- and MDA5-dependent RNA sensing in an unknown manner. All three receptors possess a C-terminal regulatory domain (RD), which in the case of RIG-I senses the viral pattern 5?-triphosphate RNA and activates ATP-dependent signaling by RIG-I. Here we report the 2.6 Ĺ crystal structure of LGP2 RD along with in vitro and in vivo functional analyses and a homology model of MDA5 RD. Although LGP2 RD is structurally related to RIG-I RD, we find it rather binds double-stranded RNA (dsRNA) and this binding is independent of 5?-triphosphates. We identify conserved and receptor-specific parts of the RNA binding site. Latter are required for specific dsRNA binding by LGP2 RD and could confer pattern selectivity between RIG-I-like receptors. Our data furthermore suggest that LGP2 RD modulates RIG-I-dependent signaling via competition for dsRNA, another pattern sensed by RIG-I, while a fully functional LGP2 is required to augment MDA5-dependent signaling. PMID:19208642

Pippig, Diana A.; Hellmuth, Johannes C.; Cui, Sheng; Kirchhofer, Axel; Lammens, Katja; Lammens, Alfred; Schmidt, Andreas; Rothenfusser, Simon; Hopfner, Karl-Peter

2009-01-01

482

BP, Corporate R&D, and the University  

ERIC Educational Resources Information Center

April 20, 2010, and the days following, provided the world with graphic images of a burning oil rig, a perception that the oil industry and state and federal governments were helpless, and a pervasive sense of the devastation wrought on coastal residents by the rig explosion and the oil spill. The residents of the Gulf Coast soon realized that…

Lea, Russ

2010-01-01

483

The Chase for the RIG-I Ligand--Recent Advances  

PubMed Central

Multicellular organisms evolved efficient host-defense mechanisms to sense viruses and to block their replication and spread. Invertebrates and plants mainly rely on RNA interference (RNAi) for antiviral defense. In mammals, the initiation of antiviral defense mechanisms is largely based on the detection of viral nucleic acids by innate receptors: retinoic acid–inducible gene I (RIG-I)–like helicases (RLHs) and Toll-like receptors (TLRs). RLHs play a pivotal role in sensing viral RNA and DNA in the cytoplasm of cells. RLHs, like Dicer of the RNAi pathway, belong to the phylogenetically conserved DExD/H-box family of helicases. Unlike TLRs, RLHs are functional in all somatic cells. Activation of RIG-I triggers antiviral responses including type I interferon (IFN), inflammasome activation and proapoptotic signaling. Here, we provide a comprehensive overview of the current literature on the ligand structures detected by RIG-I, and conclude with the molecular definition of the RIG-I ligand: short double-stranded blunt-end 5?-triphosphate RNA. The recent information on the RIG-I ligand now allows the design of short double-stranded RNA (dsRNA) oligonucleotides that are ideally suited alone or in combination with small-interfering RNA (siRNA) for the treatment of viral infection and cancer. PMID:20461060

Schlee, Martin; Hartmann, Gunther

2010-01-01

484

On the Relation between Rigging Inner Product and Master Constraint Direct Integral Decomposition  

E-print Network

Canonical quantisation of constrained systems with first class constraints via Dirac's operator constraint method proceeds by the thory of Rigged Hilbert spaces, sometimes also called Refined Algebraic Quantisation (RAQ). This method can work when the constraints form a Lie algebra. When the constraints only close with nontrivial structure functions, the Rigging map can no longer be defined. To overcome this obstacle, the Master Constraint Method has been proposed which replaces the individual constraints by a weighted sum of absolute squares of the constraints. Now the direct integral decomposition methods (DID), which are closely related to Rigged Hilbert spaces, become available and have been successfully tested in various situations. It is relatively straightforward to relate the Rigging Inner Product to the path integral that one obtains via reduced phase space methods. However, for the Master Constraint this is not at all obvious. In this paper we find sufficient conditions under which such a relation can be established. Key to our analysis is the possibility to pass to equivalent, Abelian constraints, at least locally in phase space. Then the Master Constraint DID for those Abelian constraints can be directly related to the Rigging Map and therefore has a path integral formulation.

Muxin Han; Thomas Thiemann

2009-11-17

485

Essential role of RIG-I in the activation of endothelial cells by dengue virus.  

PubMed

Dengue virus (DENV) infection is associated to exacerbated inflammatory response and structural and functional alterations in the vascular endothelium. However, the mechanisms underlying DENV-induced endothelial cell activation and their role in the inflammatory response were not investigated so far. We demonstrated that human brain microvascular endothelial cells (HBMECs) are susceptible to DENV infection, which induces the expression of the cytoplasmic pattern recognition receptor (PRR) RIG-I. Infection of HBMECs promoted an increase in the production of type I IFN and proinflammatory cytokines, which were abolished after RIG-I silencing. DENV-infected HBMECs also presented a higher ICAM-1 expression dependent on RIG-I activation as well. On the other hand, ablation of RIG-I did not interfere with virus replication. Our data suggest that RIG-I activation by DENV may participate in the disease pathogenesis through the modulation of cytokine release and expression of adhesion molecules, probably contributing to leukocyte recruitment and amplification of the inflammatory response. PMID:23089253

da Conceiçăo, Thaís Moraes; Rust, Naiara Miranda; Berbel, Ana Carolina Egypto Rosa; Martins, Nathalia Balthazar; do Nascimento Santos, Carlos Antonio; Da Poian, Andrea Thompson; de Arruda, Luciana Barros

2013-01-20

486

On the relation between rigging inner product and master constraint direct integral decomposition  

SciTech Connect

Canonical quantization of constrained systems with first-class constraints via Dirac's operator constraint method proceeds by the theory of Rigged Hilbert spaces, sometimes also called refined algebraic quantization. This method can work when the constraints form a Lie algebra. When the constraints only close with nontrivial structure functions, the Rigging map can no longer be defined. To overcome this obstacle, the master constraint method has been proposed which replaces the individual constraints by a weighted sum of absolute squares of the constraints. Now the direct integral decomposition (DID) methods, which are closely related to Rigged Hilbert spaces, become available and have been successfully tested in various situations. It is relatively straightforward to relate the rigging inner product to the path integral that one obtains via reduced phase space methods. However, for the master constraint, this is not at all obvious. In this paper we find sufficient conditions under which such a relation can be established. Key to our analysis is the possibility to pass to equivalent, Abelian constraints, at least locally in phase space. Then the master constraint DID for those Abelian constraints can be directly related to the rigging map and therefore has a path integral formulation.

Han Muxin [MPI f. Gravitationsphysik, Albert-Einstein-Institut, Am Muehlenberg 1, 14476 Potsdam (Germany); Institut f. Theoretische Physik III, Universitaet Erlangen-Nuernberg, Staudtstrasse 7, 91058 Erlangen (Germany); Thiemann, Thomas [MPI f. Gravitationsphysik, Albert-Einstein-Institut, Am Muehlenberg 1, 14476 Potsdam (Germany); Perimeter Institute for Theoretical Physics, 31 Caroline Street N, Waterloo, Ontario N2L 2Y5 (Canada); Institut f. Theoretische Physik III, Universitaet Erlangen-Nuernberg, Staudtstrasse 7, 91058 Erlangen (Germany)

2010-09-15

487

The tumour suppressor CYLD is a negative regulator of RIG-I-mediated antiviral response  

PubMed Central

On detecting viral RNAs, the RNA helicase retinoic acid-inducible gene I (RIG-I) activates the interferon regulatory factor 3 (IRF3) signalling pathway to induce type I interferon (IFN) gene transcription. How this antiviral signalling pathway might be negatively regulated is poorly understood. Microarray and bioinformatic analysis indicated that the expression of RIG-I and that of the tumour suppressor CYLD (cylindromatosis), a deubiquitinating enzyme that removes Lys 63-linked polyubiquitin chains, are closely correlated, suggesting a functional association between the two molecules. Ectopic expression of CYLD inhibits the IRF3 signalling pathway and IFN production triggered by RIG-I; conversely, CYLD knockdown enhances the response. CYLD removes polyubiquitin chains from RIG-I as well as from TANK binding kinase 1 (TBK1), the kinase that phosphorylates IRF3, coincident with an inhibition of the IRF3 signalling pathway. Furthermore, CYLD protein level is reduced in the presence of tumour necrosis factor and viral infection, concomitant with enhanced IFN production. These findings show that CYLD is a negative regulator of RIG-I-mediated innate antiviral response. PMID:18636086

Friedman, Constantin S; O'Donnell, Marie Anne; Legarda-Addison, Diana; Ng, Aylwin; Cárdenas, Washington B; Yount, Jacob S; Moran, Thomas M; Basler, Christopher F; Komuro, Akihiko; Horvath, Curt M; Xavier, Ramnik; Ting, Adrian T

2008-01-01

488

Natural gas in Lake Erie: a reconnaissance survey of discharges from an offshore drilling rig  

SciTech Connect

Field studies were conducted May 28-June 1, 1979, to determine the chemical composition and physical behavior of discharges from an offshore gas drilling rig in the central basin of Lake Erie. The drilling operation was observed for four days, from rig jackup to the circulation of mud through the borehole after drilling had been completed. Resuspension studies using nephelometry, supplemented with chemical analyses, indicated little resuspension of lake bottom materials or release of metals to the water column during rig jack-up. Portions of the turbidity plumes generated during drilling were buoyant. Three surface turbidity plumes were mapped with nephelometry to a point at which particulate concentrations reached background levels in the Lake. Detectable plumes were approx. 400 to 1500 m in length and had maximum widths < 230 m. A chemical survey conducted in the plume during early gas shows indicated that discharged inorganic chemical species were rapidly diluted to background concentrations and that methane and ethane concentrations were substantially reduced within 330 m of the rig. There was no evidence of carbon tetrachloride extractable hydrocarbons (CTEH) above background concentrations during this chemical plume survey. However, a pair of water samples taken within 100 m of the rig approximately 3 hours after drilling of the target zone was completed had CTEH concentrations that were a factor of 2.4 above background.

Ferrante, J.G.; Dettmann, E.H.; Parker, J.I.

1980-10-01

489

Detection of explosives in soils  

DOEpatents

An apparatus and method for detecting explosive-indicating compounds in subsurface soil. The apparatus has a probe with an adsorbent material on some portion of its surface that can be placed into soil beneath the ground surface, where the adsorbent material can adsorb at least one explosive-indicating compound. The apparatus additional has the capability to desorb the explosive-indicating compound through heating or solvent extraction. A diagnostic instrument attached to the probe detects the desorbed explosive-indicating compound. In the method for detecting explosive-indicating compounds in soil, the sampling probe with an adsorbent material on at least some portion of a surface of the sampling probe is inserted into the soil to contact the adsorbent material with the soil. The explosive-indicating compounds are then desorbed and transferred as either a liquid or gas sample to a diagnostic tool for analysis. The resulting gas or liquid sample is analyzed using at least one diagnostic tool selected from the group consisting of an ion-mobility spectrometer, a gas chromatograph, a high performance liquid chromatograph, a capillary electrophoresis chromatograph, a mass spectrometer, a Fourier-transform infrared spectrometer and a Raman spectrometer to detect the presence of explosive-indicating compounds.

Chambers, William B. (Edgewood, NM); Rodacy, Philip J. (Albuquerque, NM); Phelan, James M. (Bosque Farms, NM); Woodfin, Ronald L. (Sandia Park, NM)

2002-01-01

490

High Explosive Radio Telemetry System  

SciTech Connect

This paper overviews the High Explosive Radio Telemetry (HERT) system, under co-development by Los Alamos National Laboratories and Allied Signal Federal Manufacturing & Technologies. This telemetry system is designed to measure the initial performance of an explosive package under flight environment conditions, transmitting data from up to 64 sensors. It features high speed, accurate time resolution (10 ns) and has the ability to complete transmission of data before the system is destroyed by the explosion. In order to affect the resources and performance of a flight delivery vehicle as little as possible, the system is designed such that physical size, power requirements, and antenna demands are as small as possible.

Bracht, R.R.; Crawford, T.R.; Johnson, R.L.; Mclaughlin, B.M.

1998-11-04

491

Telemedicine via satellite to support offshore oil platforms.  

PubMed

On any one day, approximately 15,000-28,000 oil industry personnel are employed in the North Sea oil and gas industry. First aid in this remote environment is provided by non-medical staff on the rigs. Remote specialist advice via videoconferencing should improve the quality of offshore health care and reduce avoidable medical evacuations. Satellite communications and videoconferencing equipment was installed on the 'Alwyn North' oil platform, with medical advice provided via a call centre in Milan. Over a nine-month period, trial telemedicine links were conducted approximately twice per week. The three onshore physicians were very satisfied on each occasion with communications and diagnostic data image quality, including the ultrasound screening carried out by the rig provider. Remote specialist advice via videoconferencing should reduce unnecessary and/or untimely patient evacuation to hospital or onshore for medical assessment. PMID:18430278

Mair, Fiona; Fraser, Susan; Ferguson, James; Webster, Karyn

2008-01-01

492

Oil Spill in the Gulf of Mexico - Landsat 7  

USGS Multimedia Gallery

On April 20, 2010, an explosion at an oil well in the Gulf of Mexico resulted in a major oil spill. Since then, emergency response efforts have been underway to contain the growing oil slick before it reaches the southern coast of the United States. Landsat imagery, acquired by the U.S. Geological ...

2010-05-05

493

Mach 0.3 Burner Rig Facility at the NASA Glenn Materials Research Laboratory  

NASA Technical Reports Server (NTRS)

This Technical Memorandum presents the current capabilities of the state-of-the-art Mach 0.3 Burner Rig Facility. It is used for materials research including oxidation, corrosion, erosion and impact. Consisting of seven computer controlled jet-fueled combustors in individual test cells, these relatively small rigs burn just 2 to 3 gal of jet fuel per hour. The rigs are used as an efficient means of subjecting potential aircraft engine/airframe advanced materials to the high temperatures, high velocities and thermal cycling closely approximating actual operating environments. Materials of various geometries and compositions can be evaluated at temperatures from 700 to 2400 F. Tests are conducted not only on bare superalloys and ceramics, but also to study the behavior and durability of protective coatings applied to those materials.

Fox, Dennis S.; Miller, Robert A.; Zhu, Dongming; Perez, Michael; Cuy, Michael D.; Robinson, R. Craig

2011-01-01

494

Analysis of polymorphisms in RIG-I-like receptor genes in German multiple sclerosis patients.  

PubMed

Variation in genes encoding retinoid acid-inducible gene I (RIG-I)-like receptors (RLRs) has been implicated in the pathogenesis of autoimmune disorders. We investigated if polymorphisms in the IFIH1, RIG-I, LGP2 and VISA genes influence the risk for multiple sclerosis (MS) in a German case-control cohort comprising 716 patients and 706 controls. Evaluation of 18 single nucleotide polymorphisms (SNPs) in the four genes did not reveal significant single-SNP associations with MS risk, but two VISA polymorphisms were modestly associated with age of onset. Further, we provide initial evidence for combinatorial effects of polymorphic variants in the RIG-I, LGP2 and IFIH1 genes on MS risk. PMID:25288302

Varzari, Alexander; Bruch, Kathrin; Deyneko, Igor V; Chan, Andrew; Epplen, Joerg T; Hoffjan, Sabine

2014-12-15

495

Molecular characterization, expression patterns, and subcellular localization of RIG-I in the Jinding duck (Anas platyrhynchos domesticus).  

PubMed

Retinoic acid-inducible gene I (RIG-I)-like receptors (RLRs) have recently been identified as cytoplasmic sensors for RNA virus. Recent research has shown that RIG-I, a member of this family, play an important role in innate immunity. In this study, we cloned the RIG-I gene from Jinding duck by reverse transcription polymerase chain reaction (RT-PCR) and rapid amplification of cDNA ends (RACE). We determined that the cDNA of duRIG-I contains a 14-bp 5' UTR, a 2802-bp open reading frame, and alternative 3' UTRs (295-bp and 927-bp) and encodes a polypeptide of 933 amino acids. Based on this sequence, the duRIG-I protein is predicted to have conserved domains typical of RLRs. In addition, duRIG-I was found to be distributed throughout DF1 cells by indirect immunofluorescence, as predicted. duRIG-I mRNA was scarcely detected in healthy tissues by semi-quantitative RT-PCR (sqRT-PCR). To study the role of RIG-I in innate immunity, we used synthetic double-stranded RNA to mimic viral infection in vivo and detected duRIG-I transcripts in spleen and liver by quantitative real-time PCR (qRT-PCR). The expression of duRIG-I mRNA was significantly elevated at 8h post-injection (P < 0.05) and was indistinguishable from control levels at other time points (P > 0.05). These results suggest that duRIG-I plays an important role in innate immune responses to double-stranded RNA viruses and warrant further studies to reveal the possible mechanism. PMID:23916689

Chen, Yang; Zhang, Yang; Huang, Zhengyang; Xu, Qi; Zhu, Zhen; Tong, Yiyu; Yu, Qinmin; Ding, Jiatong; Chen, Guohong

2013-12-01

496

75 FR 47825 - Emergency Exemption; Issuance of Emergency Permit to Rehabilitate Sea Turtles Affected by the...  

Federal Register 2010, 2011, 2012, 2013

...Rehabilitate Sea Turtles Affected by the Deepwater Horizon Oil Spill, Gulf of Mexico AGENCY...spill occurred as a result of the Deepwater Horizon drilling rig explosion in the Gulf...spill occurred as a result of the Deepwater Horizon drilling rig explosion in the...

2010-08-09

497

Sidewall penetrator for oil wells  

NASA Technical Reports Server (NTRS)

Penetrator bores horizontal holes in well casing to increase trapped oil drainage. Several penetrators operated by common drive are inserted into well at once. Shaft, made from spiraling cable, rotates and thrusts simultaneously through rigid curvilinear guide tube forcing bit through casing into strata. Device pierces more deeply than armor-piercing bullets and shaped explosive charges.

Collins, E. R., Jr.

1981-01-01

498

The efficiency of an explosive plasma compressor  

Microsoft Academic Search

The paper presents results of an experimental investigation of the efficiency of an explosive plasma compressor. The experimental set-up consisted of the explosive plasma compressor and a calorimeter. The detonation of an explosive charge produced a shock wave which compressed the working gas and converted it into a plasma. The plasma was thrust by the explosion into a steel calorimetric

A. E. Voitenko; V. I. Kirko

1975-01-01

499

Prompt detonation of secondary explosives by laser  

Microsoft Academic Search

Secondary high explosives have been promptly detonated by directing a laser beam of various wavelengths from 266 nanometers to 1.06 micron on the surface of the explosives. For this paper ''prompt'' means the excess transit time through an explosive charge is \\/approximately\\/250 nanoseconds (or less) less than the accepted full detonation velocity time. Timing between laser pulse, explosive initiation and

Paisley

1989-01-01

500

Explosives detection with hard-wired moths  

Microsoft Academic Search

Abstract—Insects, such as moths, can be trained to respond to explosives odors. A prototype system that can use trained insects such as moths to detect explosives was designed, assembled, and tested. It compares the electromyographic signals of insects trained to respond or not respond to a target explosive vapor in order to determine whether or not explosive devices, such as

Tony L. King; Frank M. Horine; Kevin C. Daly; Brian H. Smith

2004-01-01