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1

Drilling Techniques | Open Energy Information  

Open Energy Info (EERE)

Page Page Edit with form History Facebook icon Twitter icon » Drilling Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Drilling Techniques Details Activities (0) Areas (0) Regions (0) NEPA(20) Exploration Technique Information Exploration Group: Drilling Techniques Exploration Sub Group: None Parent Exploration Technique: Exploration Techniques Information Provided by Technique Lithology: Identify lithology and mineralization, provide core samples and rock cuttings Stratigraphic/Structural: Retrieved samples can be used to identify stratigraphy and structural features such as fracture networks or faults Hydrological: -Water samples can be used for geochemical analysis -Fluid pressures can be used to estimate flow rates

2

Definition: Drilling Techniques | Open Energy Information  

Open Energy Info (EERE)

Techniques Techniques Jump to: navigation, search Dictionary.png Drilling Techniques There are a variety of drilling techniques which can be used to sink a borehole into the ground. Each has its advantages and disadvantages, in terms of the depth to which it can drill, the type of sample returned, the costs involved and penetration rates achieved. There are two basic types of drills: drills which produce rock chips, and drills which produce core samples.[1] View on Wikipedia Wikipedia Definition Well drilling is the process of drilling a hole in the ground for the extraction of a natural resource such as ground water, brine, natural gas, or petroleum, for the injection of a fluid from surface to a subsurface reservoir or for subsurface formations evaluation or monitoring.

3

Managed pressure drilling techniques and tools  

E-Print Network (OSTI)

The economics of drilling offshore wells is important as we drill more wells in deeper water. Drilling-related problems, including stuck pipe, lost circulation, and excessive mud cost, show the need for better drilling technology. If we can solve these problems, the economics of drilling the wells will improve, thus enabling the industry to drill wells that were previously uneconomical. Managed pressure drilling (MPD) is a new technology that enables a driller to more precisely control annular pressures in the wellbore to prevent these drillingrelated problems. This paper traces the history of MPD, showing how different techniques can reduce drilling problems. MPD improves the economics of drilling wells by reducing drilling problems. Further economic studies are necessary to determine exactly how much cost savings MPD can provide in certain situation. Furter research is also necessary on the various MPD techniques to increase their effectiveness.

Martin, Matthew Daniel

2003-05-01T23:59:59.000Z

4

Downhole drilling network using burst modulation techniques  

DOE Patents (OSTI)

A downhole drilling system is disclosed in one aspect of the present invention as including a drill string and a transmission line integrated into the drill string. Multiple network nodes are installed at selected intervals along the drill string and are adapted to communicate with one another through the transmission line. In order to efficiently allocate the available bandwidth, the network nodes are configured to use any of numerous burst modulation techniques to transmit data.

Hall; David R. (Provo, UT), Fox; Joe (Spanish Fork, UT)

2007-04-03T23:59:59.000Z

5

Innovative techniques cut costs in wetlands drilling  

Science Conference Proceedings (OSTI)

This paper reports on an approach to drilling oil and gas wells in sensitive wetlands areas contributed to a savings of over $1.2 million on a three-well, $3 million drilling project in south Louisiana. ARCO Oil and Gas Co. drilled a three-well project in the Bayou Sale field with a truck-mounted workover rig and a modified solids-control system. This smaller equipment eliminated the need to build a large location in the marsh. Traditional drilling techniques require a large drillsite to accommodate all the equipment of a modern drilling complex. However, recently imposed environmental regulations substantially limit, and in some cases prohibit, the use of these conventional techniques for drilling wells in wetlands areas. Based on the potentially huge economic and operational impact on the drilling industry because of these stricter regulations, alternatives to these traditional practices are essential.

Navarro, A.R. (ARCO Oil and Gas Co., Lafayette, LA (US))

1991-10-14T23:59:59.000Z

6

Balanced pressure techniques applied to geothermal drilling  

DOE Green Energy (OSTI)

The objective of the study is to evaluate balanced pressure drilling techniques for use in combating lost circulation in geothermal drilling. Drilling techniques evaluated are: aerated drilling mud, parasite tubing, concentric drill pipe, jet sub, and low density fluids. Based on the present state of the art of balanced pressure drilling techniques, drilling with aerated water has the best overall balance of performance, risk, availability, and cost. Aerated water with a 19:1 free air/water ratio reduce maximum pressure unbalance between wellbore and formation pressures from 1000 psi to 50 psi. This pressure unbalance is within acceptable operating limits; however, air pockets could form and cause pressure surges in the mud system due to high percent of air. Low density fluids used with parasite tubing has the greatest potential for combating lost circulation in geothermal drilling, when performance only is considered. The top portion of the hole would be aerated through the parasite tube at a 10:1 free air/mud ratio and the low density mud could be designed so that its pressure gradient exactly matches the formation pore pressure gradient. The main problem with this system at present is the high cost of ceramic beads needed to produce low density muds.

Dareing, D.W.

1981-08-01T23:59:59.000Z

7

Directional drilling equipment and techniques for deep hot granite wells  

DOE Green Energy (OSTI)

Conventional directional drilling technology has been extended and modified to drill the first well of a subsurface geothermal energy extraction system at the Fenton Hill, New Mexico, Hot dry Rock (HDR) experimental site. Completing the first of a two-wellbore HDR system has resulted in the definition of operational limitations of many conventional directional drilling tools, instrumentation and techniques. The successful completion of the first wellbore, Energy Extraction Well No. 2 (EE-2), to a measured depth of 15,300 ft (4.7 km) in granite reservoir rock with a bottomhole temperature of 530/sup 0/F (275/sup 0/C) required the development of a new high temperature downhole motor and modification of existing wireline-conveyed steering tool systems. Conventional rotary-driven directional assemblies were successfully modified to accommodate the very hard and abrasive rock encountered while drilling nearly 8500 ft (2.6 km) of directional hole to a final inclination of 35/sup 0/ from the vertical at a controlled azimuthal orientation.

Brittenham, T.L.; Sursen, G.; Neudecker, J.W.; Rowley, J.C.; Williams, R.E.

1980-01-01T23:59:59.000Z

8

Techniques Employed to Conduct Postshot Drilling at the former Nevada Test Site  

Science Conference Proceedings (OSTI)

Postshot drilling provided essential data on the results of the underground nuclear tests conducted at the Nevada Test Site (NTS), now identified as the Nevada National Security Site (NNSS). It was the means by which samples from the zone of interest were obtained for radiochemical analysis. This handbook describes how Lawrence Livermore National Laboratory (LLNL) conducted postshot drilling operations at the NTS, and it provides a general understanding of the process. Postshot drilling is a specialized application of rotary drilling. Accordingly, this handbook gives a brief description of rotary drilling in Section 2 to acquaint the reader with the general subject before proceeding to the specialized techniques used in postshot drilling. In Section 3, the handbook describes the typical postshot drilling situation at the former NTS and the drilling methods used. Section 4 describes the typical sequence of operations in postshot drilling at the former NTS. Detailed information on special equipment and techniques is given in a series of appendices (A through F) at the end of the handbook.

Dekin, W D

2011-04-14T23:59:59.000Z

9

Drilling techniques presently in use by the Geothermal Studies Project, US Geological Survey  

DOE Green Energy (OSTI)

The heat-flow studies program has evolved from one in which holes drilled for other purposes (mining and oil exploration, nuclear tests, hydrologic studies, etc.) provided the bulk of the data to a program in which the free holes, while still providing cost-effective and useful data, are being supplemented increasingly by holes drilled specifically for heat-flow determinations at locations where thermal data of high quality are needed, and where nobody else is interested in drilling. Ideally, heat-flow holes should be located in areas with moderate local relief and should be completed so that vertical water movement is inhibited. The most satisfactory test media for heat-flow determinations are crystalline rocks (particularly granites) and unconsolidated sediments; carbonate rocks and volcanic terranes can provide useful heat-flow data, but they present greater challenges both in drilling and interpretation. Drilling techniques have evolved from that of the continuously cored diamond-drilled hole (adapted from mining exploration) to adaptations of the shot-hole and blast-hole techniques used in petroleum exploration, water-well construction, and quarry operations. Spot cores are obtained where necessary to provide specific petrologic, geochemical, and physical data, but primary reliance is placed on ditch samples from rotary or percussion drilling for routine measurements of thermal conductivity and heat production. In shallow (50 to 100 m) holes in low temperature environments, plastic casing is used to maintain access for later temperature measurements. For deeper holes, steel casing is preferred. The annulus between casing and borehole wall in the lowermost 50 to 80 meters of heat-flow holes is routinely grouted off with a specially designed mixture of cement, bentonite, salt, and water to prevent vertical water movement.

Moses, T.H. Jr.; Sass, J.H.

1979-01-01T23:59:59.000Z

10

Drilling and blasting techniques and costs for strip mines in Appalachia  

SciTech Connect

On-site investigations of blasting techniques were conducted at twenty surface coal mining operations in the steep slopes of Appalachia. The mine sites represented a range of mountain mining methods and annual coal production levels; all sites used similar techniques and equipment for the removal of fragmented waste rock. Hole loading characteristics and constraints limiting blast designs were observed at each mine site. This report summarizes technical blasting data and geological conditions which require special design considerations. Three mine sites were selected for future research in fragmentation efficiency. Detailed economic data on drilling and blasting were gathered from the three research sites and are reported herein. A great deal of fragmentation difficulties stem from tough, unpredictable geology with specific bedding characteristics and local zones of defined structural weaknesses such as jointing and vertical seams. Exceptionally hard bedrock, existing as a caprock or as the basal layer above the coal seam, persists as the cause of oversize rock breakage or, in the latter case, damage to the coal unless special precautions are taken. Federal blasting regulations strictly control the amount of explosives used as well as throw of the fragmented rock. This requires that blasting modifications be employed. The nature and extent of blast modifications were observed to be related to terrain and demographic conditions around the mine site. Drilling and blasting costs reported for the three mine sites averaged $0.21 per cubic yard of material blasted. Drilling costs varied widely, as drilling time was indicative of geologies and often, drilling costs remained the greatest percentage of total blasting and drilling costs.

Aimone, C.T.

1980-06-01T23:59:59.000Z

11

Offshore underbalanced drilling system could revive field developments. Part 2: Making this valuable reservoir drilling/completion technique work on a conventional offshore drilling platform  

Science Conference Proceedings (OSTI)

Part 1, presented in the July issue, discussed the emerging trend to move underbalanced drilling (UBD) operations into the offshore arena, following its successful application in many onshore areas. This concluding article delves into the details of applying UBD offshore. Starting with advantages the technique offers in many maturing or complex/marginal prospects, the UBD system for offshore platforms use is described. This involves conversion of the conventional rotary system, use of rotating diverters, design of the surface fluid separation system and the necessary gas (nitrogen or natural gas) injection system to lighten the fluid column. Commonly faced operational challenges for offshore UBD are listed along with recommended solutions.

Nessa, D.O.; Tangedahl, M.J.; Saponja, J.

1997-10-01T23:59:59.000Z

12

Petroleum well drilling monitoring through cutting image analysis and artificial intelligence techniques  

Science Conference Proceedings (OSTI)

Petroleum well drilling monitoring has become an important tool for detecting and preventing problems during the well drilling process. In this paper, we propose to assist the drilling process by analyzing the cutting images at the vibrating shake shaker, ... Keywords: Applied artificial intelligence, Artificial Neural Networks, Optimum-path forest, Petroleum well drilling, Support vector machines

Ivan R. Guilherme; Aparecido N. Marana; Joăo P. Papa; Giovani Chiachia; Luis C. S. Afonso; Kazuo Miura; Marcus V. D. Ferreira; Francisco Torres

2011-02-01T23:59:59.000Z

13

New Techniques to Characterize and Remove Water-Based Drilling Fluids Filter Cake  

E-Print Network (OSTI)

Filter cake characterization is very important in drilling and completion operations. Heterogeneity of the filter cake plays a key role in the design of chemical treatments needed to remove the filter cake. The objectives of this study are to characterize the filter cake under static and dynamic conditions, evaluate the using of polylactic acid and chelating agents to remove calcium carbonate-based filter cake, assess glycolic acid to remove Mn3O4-based filter cake, and evaluate ilmenite as a weighting material for water-based drilling fluid. In order to characterize the filter cake, computer tomography (CT) was used in combination with the scanning electronic microscopy (SEM) to analyze the filter cake. A modified HPHT filter cell was developed to perform the filtration tests. A see-through-cell was used to check the compatibility of different chemicals that were used to remove the filter cake. The results obtained from the CT scan showed that the filter cake was heterogeneous and contained two layers with different properties under static and dynamic conditions. Under static conditions, the formation of filter cake changed from compression to buildup; while under dynamic conditions, the filter cake was formed under continuous buildup. Polylactic acid was used as a component of the drilling fluid components and the results obtained showed that the drill-in fluid had stable rheological properties up to 250?F over 24 hrs. The removal efficiency of the filter cake was nearly 100% and the return permeability was about 100% for Indiana limestone and Berea sandstone cores, when using a weight ratio of polylactic acid to calcium carbonate 3 to 1. GLDA (pH 3.3) and HEDTA (pH 4) can be used to remove the filter cake in one step without using ?-amylase enzyme solutions. GLDA (20 wt% in a 200 g solution and pH of 3.3) and HEDTA (20 wt% in a 200 g solution and pH 4) had 100% removal efficiency of the filter cake using Indiana limestone and Berea sandstone cores. Chelate solutions, GLDA (pH of 3.3 - 13) and HEDTA (pH of 4 and 7) were incompatible with ?-amylase enzyme solutions over a wide range of temperatures. CT results showed that no formation damage was observed when using chelating agents as a breaker to remove the calcium carbonate filter cake. Manganese tetraoxide-based filter cake had a removal efficiency of 85% after 20 hrs soaking with glycolic acid (5 wt%) after soaking with ?-amylase for 24 hrs, and 89% after reaction with acid mixture (1 wt% HCl and 7 wt% glycolic acid) for 16 hrs. for both methods, the retained permeability was 100% for Indiana limestone cores and 120% for Berea sandstone cores, which indication maximum productivity of these formations. Ilmenite-based filter cake was ideal for HPHT applications, 0.2 in. thickness and 12 cm3 filtrate under dynamic conditions. The filtrate volume was reduced by adding a minor amount of CaCO3 solids that improved the particles packing. No sag problem was observed when using the micronized ilmenite in water-based drilling fluids. Ilmenite has a negative zeta potential in alkaline media and had a stable dispersion in water at pH > 7.

Elkatatny, Salaheldin Mahmoud

2013-05-01T23:59:59.000Z

14

Drilling research on the electrical detonation and subsequent cavitation in a liquid technique (spark drilling). Status report, July 1--December 31, 1976  

DOE Green Energy (OSTI)

The electrical characteristics of water during a rapid electrical discharge have been determined. These characteristics were used in predicting energy in the spark drilling arc and in designing a new-generation spark drill. The design of this drill system is described, along with the proposed schedule of its fabrication and use. Other activities accomplished during this report period are also discussed.

Not Available

1976-04-01T23:59:59.000Z

15

Use of Cutting-Edge Horizontal and Underbalanced Drilling Technologies and Subsurface Seismic Techniques to Explore, Drill and Produce Reservoired Oil and Gas from the Fractured Monterey Below 10,000 ft in the Santa Maria Basin of California  

Science Conference Proceedings (OSTI)

This project was undertaken to demonstrate that oil and gas can be drilled and produced safely and economically from a fractured Monterey reservoir in the Santa Maria Basin of California by employing horizontal wellbores and underbalanced drilling technologies. Two vertical wells were previously drilled in this area with heavy mud and conventional completions; neither was commercially productive. A new well was drilled by the project team in 2004 with the objective of accessing an extended length of oil-bearing, high-resistivity Monterey shale via a horizontal wellbore, while implementing managed-pressure drilling (MPD) techniques to avoid formation damage. Initial project meetings were conducted in October 2003. The team confirmed that the demonstration well would be completed open-hole to minimize productivity impairment. Following an overview of the geologic setting and local field experience, critical aspects of the application were identified. At the pre-spud meeting in January 2004, the final well design was confirmed and the well programming/service company requirements assigned. Various design elements were reduced in scope due to significant budgetary constraints. Major alterations to the original plan included: (1) a VSP seismic survey was delayed to a later phase; (2) a new (larger) surface hole would be drilled rather than re-enter an existing well; (3) a 7-in. liner would be placed into the top of the Monterey target as quickly as possible to avoid problems with hole stability; (4) evaluation activities were reduced in scope; (5) geosteering observations for fracture access would be deduced from penetration rate, cuttings description and hydrocarbon in-flow; and (6) rather than use nitrogen, a novel air-injection MPD system was to be implemented. Drilling operations, delayed from the original schedule by capital constraints and lack of rig availability, were conducted from September 12 to November 11, 2004. The vertical and upper curved sections were drilled and lined through the problematic shale member without major stability problems. The top of the targeted Monterey was thought to be seen at the expected TVD of 10,000 ft where the 7-in. liner was set at a 60{sup o} hole angle. Significant oil and gas shows suggested the fractured interval anticipated at the heel location had been penetrated. A total of 2572 ft of 6 1/8-in. near-horizontal interval was placed in the shale section, extending planned well length by approximately 470 ft. Very little hydrocarbon in-flow was observed from fractures along the productive interval. This may be a result of the well trajectory falling underneath the Monterey fractured zone. Hydrocarbon observations, cuttings analysis and gamma-ray response indicated additional fractured intervals were accessed along the last {+-}900 ft of well length. The well was completed with a 2 7/8-in. tubing string set in a production packer in preparation for flow and swab tests to be conducted later by a service rig. The planned well time was estimated as 39 days and overall cost as $2.4 million. The actual results are 66 days at a total cost of $3.4 million. Well productivity responses during subsequent flow and swabbing tests were negative. The well failed to inflow and only minor amounts (a few barrels) of light oil were recovered. The lack of production may suggest that actual sustainable reservoir pressure is far less than anticipated. Temblor is currently planning to re-enter and clean out the well and run an Array Induction log (primarily for resistivity and correlation purposes), and an FMI log (for fracture detection). Depending on the results of these logs, an acidizing or re-drill program will be planned.

George Witter; Robert Knoll; William Rehm; Thomas Williams

2005-09-29T23:59:59.000Z

16

Use of Cutting-Edge Horizontal and Underbalanced Drilling Technologies and Subsurface Seismic Techniques to Explore, Drill and Produce Reservoired Oil and Gas from the Fractured Monterey Below 10,000 ft in the Santa Maria Basin of California  

Science Conference Proceedings (OSTI)

This project was undertaken to demonstrate that oil and gas can be drilled and produced safely and economically from a fractured Monterey reservoir in the Santa Maria Basin of California by employing horizontal wellbores and underbalanced drilling technologies. Two vertical wells were previously drilled in this area with heavy mud and conventional completions; neither was commercially productive. A new well was drilled by the project team in 2004 with the objective of accessing an extended length of oil-bearing, high-resistivity Monterey shale via a horizontal wellbore, while implementing managed-pressure drilling (MPD) techniques to avoid formation damage. Initial project meetings were conducted in October 2003. The team confirmed that the demonstration well would be completed open-hole to minimize productivity impairment. Following an overview of the geologic setting and local field experience, critical aspects of the application were identified. At the pre-spud meeting in January 2004, the final well design was confirmed and the well programming/service company requirements assigned. Various design elements were reduced in scope due to significant budgetary constraints. Major alterations to the original plan included: (1) a VSP seismic survey was delayed to a later phase; (2) a new (larger) surface hole would be drilled rather than re-enter an existing well; (3) a 7-in. liner would be placed into the top of the Monterey target as quickly as possible to avoid problems with hole stability; (4) evaluation activities were reduced in scope; (5) geosteering observations for fracture access would be deduced from penetration rate, cuttings description and hydrocarbon in-flow; and (6) rather than use nitrogen, a novel air-injection MPD system was to be implemented. Drilling operations, delayed from the original schedule by capital constraints and lack of rig availability, were conducted from September 12 to November 11, 2004. The vertical and upper curved sections were drilled and lined through the problematic shale member without major stability problems. The top of the targeted Monterey was thought to be seen at the expected TVD of 10,000 ft where the 7-in. liner was set at a 60{sup o} hole angle. Significant oil and gas shows suggested the fractured interval anticipated at the heel location had been penetrated. A total of 2572 ft of 6{Delta}-in. near-horizontal interval was placed in the shale section, extending planned well length by approximately 470 ft. Very little hydrocarbon in-flow was observed from fractures along the productive interval. This may be a result of the well trajectory falling underneath the Monterey fractured zone. Hydrocarbon observations, cuttings analysis and gamma-ray response indicated additional fractured intervals were accessed along the last {+-}900 ft of well length. The well was completed with a 2 and 7/8-in. tubing string set in a production packer in preparation for flow and swab tests to be conducted later by a service rig. The planned well time was estimated as 39 days and overall cost as $2.4 million. The actual results are 66 days at a total cost of $3.4 million. Well productivity responses during subsequent flow and swabbing tests were negative. The well failed to inflow and only minor amounts (a few barrels) of light oil were recovered. The lack of production may suggest that actual sustainable reservoir pressure is far less than anticipated. Temblor attempted in July, 2006, to re-enter and clean out the well and run an Array Induction log (primarily for resistivity and correlation purposes), and an FMI log (for fracture detection). Application of surfactant in the length of the horizontal hole, and acid over the fracture zone at 10,236 was also planned. This attempt was not successful in that the clean out tools became stuck and had to be abandoned.

George Witter; Robert Knoll; William Rehm; Thomas Williams

2006-06-30T23:59:59.000Z

17

USE OF CUTTING-EDGE HORIZONTAL AND UNDERBALANCED DRILLING TECHNOLOGIES AND SUBSURFACE SEISMIC TECHNIQUES TO EXPLORE, DRILL AND PRODUCE RESERVOIRED OIL AND GAS FROM THE FRACTURED MONTEREY BELOW 10,000 FT IN THE SANTA MARIA BASIN OF CALIFORNIA  

Science Conference Proceedings (OSTI)

This project was undertaken to demonstrate that oil and gas can be drilled and produced safely and economically from a fractured Monterey reservoir in the Santa Maria Basin of California by employing horizontal wellbores and underbalanced drilling technologies. Two vertical wells were previously drilled in this area by Temblor Petroleum with heavy mud and conventional completions; neither was commercially productive. A new well was drilled by the project team in 2004 with the objective of accessing an extended length of oil-bearing, high-resistivity Monterey shale via a horizontal wellbore, while implementing managed-pressure drilling (MPD) techniques to avoid formation damage. Initial project meetings were conducted in October 2003. The team confirmed that the demonstration well would be completed open-hole to minimize productivity impairment. Following an overview of the geologic setting and local field experience, critical aspects of the application were identified. At the pre-spud meeting in January 2004, the final well design was confirmed and the well programming/service company requirements assigned. Various design elements were reduced in scope due to significant budgetary constraints. Major alterations to the original plan included: (1) a VSP seismic survey was delayed to a later phase; (2) a new (larger) surface hole would be drilled rather than re-enter an existing well; (3) a 7-in. liner would be placed into the top of the Monterey target as quickly as possible to avoid problems with hole stability; (4) evaluation activities were reduced in scope; (5) geosteering observations for fracture access would be deduced from penetration rate, cuttings description and hydrocarbon in-flow; and (6) rather than use nitrogen, a novel air-injection MPD system was to be implemented. Drilling operations, delayed from the original schedule by capital constraints and lack of rig availability, were conducted from September 12 to November 11, 2004. The vertical and upper curved sections were drilled and lined through the problematic shale member without major stability problems. The top of the targeted Monterey was thought to be seen at the expected TVD of 10,000 ft where the 7-in. liner was set at a 60{sup o} hole angle. Significant oil and gas shows suggested the fractured interval anticipated at the heel location had been penetrated. A total of 2572 ft of 6.-in. near-horizontal interval was placed in the shale section, extending planned well length by approximately 470 ft. Very little hydrocarbon in-flow was observed from fractures along the productive interval. This may be a result of the well trajectory falling underneath the Monterey fractured zone. Hydrocarbon observations, cuttings analysis and gamma-ray response indicated additional fractured intervals were accessed along the last {+-}900 ft of well length. The well was completed with a 2 7/8-in. tubing string set in a production packer in preparation for flow and swab tests to be conducted later by a service rig. The planned well time was estimated as 39 days and overall cost as $2.4 million. The actual results are 66 days at a total cost of $3.4 million. Well productivity responses during subsequent flow and swabbing tests were negative. The well failed to inflow and only minor amounts (a few barrels) of light oil were recovered. The lack of production may suggest that actual sustainable reservoir pressure is far less than anticipated. Temblor is currently investigating the costs and operational viability of re-entering the well and conducting an FMI (fracture detection) log and/or an acid stimulation. No final decision or detailed plans have been made regarding these potential interventions at this time.

George Witter; Robert Knoll; William Rehm; Thomas Williams

2005-02-01T23:59:59.000Z

18

Special techniques and equipment reduce problems  

Science Conference Proceedings (OSTI)

Novel underbalanced drilling procedures, downhole-adjustable equipment, and a mud easily cleaned from the fractures, helped reduce formation damage and ensured a successful horizontal well in the high-temperature, abnormally pressured Austin chalk in Louisiana. The technique for successfully drilling the lateral in the Austin chalk included taking the smallest influx possible, maintaining as low a back pressure as possible, and balancing the mud gains from the hole with the mud losses to the hole. Other keys to the success of this well included the use of measurement-while-drilling (MWD) with resistivity in real time to pick the top of the formation. In describing the drilling process, the paper discusses the following: intermediate casing point, pilot hole, 8 1/2-inch curve, snubbing, laterals, bit performance, mud properties, underbalanced drilling, high temperature, directional drilling, and well completion, and then gives recommendations for similar wells.

Joseph, R.A. (OXY U.S.A. Inc., Houston, TX (United States))

1995-03-27T23:59:59.000Z

19

Heterogeneous Shallow-Shelf Carbonate Buildups in the Paradox Basin, Utah and Colorado: Targets for Increased Oil Production and Reserves Using Horizontal Drilling Techniques  

Science Conference Proceedings (OSTI)

This report covers research activities for the second half of the second project year (October 6, 2001, through April 5, 2002). This work includes description and analysis of cores, correlation of geophysical well logs, reservoir mapping, petrographic description of thin sections, cross plotting of permeability and porosity data, and development of horizontal drilling strategies for the Little Ute and Sleeping Ute fields in Montezuma County, Colorado. Geological characterization on a local scale focused on reservoir heterogeneity, quality, and lateral continuity, as well as possible compartmentalization, within these fields. This study utilizes representative core, geophysical logs, and thin sections to characterize and grade each field's potential for drilling horizontal laterals from existing development wells.

Wray, Laura L.; Eby, David E.; Chidsey, Jr., Thomas C.

2002-07-24T23:59:59.000Z

20

Electron Based Techniques  

Science Conference Proceedings (OSTI)

Mar 5, 2013 ... Characterization of Materials through High Resolution Coherent Imaging: Electron Based Techniques Sponsored by: TMS Structural Materials ...

Note: This page contains sample records for the topic "techniques drilling techniques" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Milling Techniques - TMS  

Science Conference Proceedings (OSTI)

February 4-8 · 1996 TMS ANNUAL MEETING · Anaheim, California. SYNTHESIS AND PROCESSING OF NANOCRYSTALLINE POWDER III: Milling Techniques ...

22

Applied Science/Techniques  

NLE Websites -- All DOE Office Websites (Extended Search)

Applied Science/Techniques Applied Science/Techniques Applied Science/Techniques Print The ALS is an excellent incubator of new scientific techniques and instrumentation. Many of the technical advances that make the ALS a world-class soft x-ray facility are developed at the ALS itself. The optical components in use at the ALS-mirrors and lenses optimized for x-ray wavelengths-require incredibly high-precision surfaces and patterns (often formed through extreme ultraviolet lithography at the ALS) and must undergo rigorous calibration and testing provided by beamlines and equipment from the ALS's Optical Metrology Lab and Berkeley Lab's Center for X-Ray Optics. New and/or continuously improved experimental techniques are also a crucial element of a thriving scientific facility. At the ALS, examples of such "technique" highlights include developments in lensless imaging, soft x-ray tomography, high-throughput protein analysis, and high-power coherent terahertz radiation.

23

Multicolor Underwater Imaging Techniques.  

E-Print Network (OSTI)

??Studies were conducted on multispectral polarimetric subtraction imaging techniques for underwater imaging that use a broadband light source. The main objective of this study was… (more)

Waggoner, Douglas Scott

2007-01-01T23:59:59.000Z

24

Supporting technology for enhanced recovery, Annex V: evaluate application of recently developed techniques in the areas of drilling, coring, and telemetry. Venezuela-MEM/USA-DOE fossil-energy report V-1  

Science Conference Proceedings (OSTI)

The Agreement between the United States and Venezuela was designed to further energy research and development in six areas. This report focuses on Annex V - Drilling, Coring, and Telemetry as supporting technology for enhanced oil recovery projects in the United States and Venezuela. Annex V consists of 18 tasks to perform these three projects. This report completes the work for Annex V. Energy research and development in the area of Enhanced Oil Recovery has as its goal the more efficient and complete production of the third crop of oil. Methods and techniques must be developed to assist in the implementation of EOR projects. Technology development that reduces costs and provides better reservoir information often has a direct impact on the economic viability of EOR projects and Annex V addresses these areas. Each of the three areas covered by Annex V are separate entities and are presented in this report as different sections. Each has its own Abstract. The drilling and coring tests were highly successful but only a limited amount of work was necessary in the Telemetry area because a field test was not feasible.

Williams, C.R.; Lichaa, P.; Van Domselaar, H.

1983-04-01T23:59:59.000Z

25

Category:Exploration Techniques | Open Energy Information  

Open Energy Info (EERE)

Techniques Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Geothermalpower.jpg Looking for the Geothermal Exploration page? For detailed information on Geothermal Exploration, click here. Category:Exploration Techniques Add.png Add a new Exploration Technique Subcategories This category has the following 9 subcategories, out of 9 total. D [+] Data and Modeling Techniques‎ (2 categories) 2 pages [+] Downhole Techniques‎ (5 categories) 10 pages [+] Drilling Techniques‎ (2 categories) 4 pages F [+] Field Methods‎ (1 categories) [+] Field Techniques‎ (2 categories) 4 pages G [+] Geochemical Techniques‎ (1 categories) 1 pages G cont. [+] Geophysical Techniques‎ (4 categories) 5 pages L [+] Lab Analysis Techniques‎ (2 categories) 4 pages R [+] Remote Sensing Techniques‎ (2 categories) 2 pages

26

Data Techniques | Open Energy Information  

Open Energy Info (EERE)

Techniques Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Data Techniques Details Activities (0) Areas (0) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Data and Modeling Techniques Exploration Sub Group: Data Techniques Parent Exploration Technique: Data and Modeling Techniques Information Provided by Technique Lithology: Stratigraphic/Structural: Hydrological: Thermal: Dictionary.png Data Techniques: The collection, processing, and interpretation of data from various methods so accurate interpretations can be made about the subject matter. Other definitions:Wikipedia Reegle Introduction Data techniques are any technique where data is collected and organized in a manner so that the information is useful for geothermal purposes. The

27

HETEROGENEOUS SHALLOW-SHELF CARBONATE BUILDUPS IN THE PARADOX BASIN, UTAH AND COLORADO: TARGETS FOR INCREASED OIL PRODUCTION AND RESERVES USING HORIZONTAL DRILLING TECHNIQUES  

Science Conference Proceedings (OSTI)

The Paradox Basin of Utah, Colorado, Arizona, and New Mexico contains nearly 100 small oil fields producing from carbonate buildups within the Pennsylvanian (Desmoinesian) Paradox Formation. These fields typically have one to 10 wells with primary production ranging from 700,000 to 2,000,000 barrels (111,300-318,000 m{sup 3}) of oil per field and a 15 to 20 percent recovery rate. At least 200 million barrels (31.8 million m{sup 3}) of oil will not be recovered from these small fields because of inefficient recovery practices and undrained heterogeneous reservoirs. Several fields in southeastern Utah and southwestern Colorado are being evaluated as candidates for horizontal drilling and enhanced oil recovery from existing vertical wells based upon geological characterization and reservoir modeling case studies. Geological characterization on a local scale is focused on reservoir heterogeneity, quality, and lateral continuity, as well as possible reservoir compartmentalization, within these fields. This study utilizes representative cores, geophysical logs, and thin sections to characterize and grade each field's potential for drilling horizontal laterals from existing development wells. The results of these studies can be applied to similar fields elsewhere in the Paradox Basin and the Rocky Mountain region, the Michigan and Illinois Basins, and the Midcontinent region. This report covers research activities for the second half of the third project year (October 6, 2002, through April 5, 2003). The primary work included describing and mapping regional facies of the upper Ismay and lower Desert Creek zones of the Paradox Formation in the Blanding sub-basin, Utah. Regional cross sections show the development of ''clean carbonate'' packages that contain all of the productive reservoir facies. These clean carbonates abruptly change laterally into thick anhydrite packages that filled several small intra-shelf basins in the upper Ismay zone. Examination of upper Ismay cores identified seven depositional facies: open marine, middle shelf, inner shelf/tidal flat, bryozoan mounds, phylloid-algal mounds, quartz sand dunes, and anhydritic salinas. Lower Desert Creek facies include open marine, middle shelf, protomounds/collapse breccia, and phylloid-algal mounds. Mapping the upper Ismay zone facies delineates very prospective reservoir trends that contain porous, productive buildups around the anhydrite-filled intra-shelf basins. Facies and reservoir controls imposed by the anhydritic intra-shelf basins should be considered when selecting the optimal location and orientation of any horizontal drilling from known phylloidalgal reservoirs to undrained reserves, as well as identifying new exploration trends. Although intra-shelf basins are not present in the lower Desert Creek zone of the Blanding sub-basin, drilling horizontally along linear shoreline trends could also encounter previously undrilled, porous intervals and buildups. Technology transfer activities consisted of a technical presentation at a Class II Review conference sponsored by the National Energy Technology Laboratory at the Center for Energy and Economic Diversification in Odessa, Texas. The project home page was updated on the Utah Geological Survey Internet web site.

David E. Eby; Thomas C. Chidsey, Jr.; Kevin McClure; Craig D. Morgan

2003-07-01T23:59:59.000Z

28

Heterogeneous Shallow-Shelf Carbonate Buildups in the Paradox Basin, Utah and Colorado: Targets for Increased Oil Production and Reserves Using Horizontal Drilling Techniques  

Science Conference Proceedings (OSTI)

The Paradox Basin of Utah, Colorado, Arizona, and New Mexico contains nearly 100 small oil fields producing from carbonate buildups within the Pennsylvanian (Desmoinesian) Paradox Formation. These fields typically have one to 10 wells with primary production ranging from 700,000 to 2,000,000 barrels (111,300-318,000 m{sup 3}) of oil per field and a 15 to 20 percent recovery rate. At least 200 million barrels (31.8 million m{sup 3}) of oil will not be recovered from these small fields because of inefficient recovery practices and undrained heterogeneous reservoirs. Several fields in southeastern Utah and southwestern Colorado are being evaluated as candidates for horizontal drilling and enhanced oil recovery from existing vertical wells based upon geological characterization and reservoir modeling case studies. Geological characterization on a local scale is focused on reservoir heterogeneity, quality, and lateral continuity, as well as possible reservoir compartmentalization, within these fields. This study utilizes representative cores, geophysical logs, and thin sections to characterize and grade each field's potential for drilling horizontal laterals from existing development wells. The results of these studies can be applied to similar fields elsewhere in the Paradox Basin and the Rocky Mountain region, the Michigan and Illinois Basins, and the Midcontinent region. This report covers research activities for the first half of the fourth project year (April 6 through October 5, 2003). The work included (1) analysis of well-test data and oil production from Cherokee and Bug fields, San Juan County, Utah, and (2) diagenetic evaluation of stable isotopes from the upper Ismay and lower Desert Creek zones of the Paradox Formation in the Blanding sub-basin, Utah. Production ''sweet spots'' and potential horizontal drilling candidates were identified for Cherokee and Bug fields. In Cherokee field, the most productive wells are located in the thickest part of the mound facies of the upper Ismay zone, where microporosity is well developed. In Bug field, the most productive wells are located structurally downdip from the updip porosity pinch out in the dolomitized lower Desert Creek zone, where micro-box-work porosity is well developed. Microporosity and micro-box-work porosity have the greatest hydrocarbon storage and flow capacity, and potential horizontal drilling target in these fields. Diagenesis is the main control on the quality of Ismay and Desert Creek reservoirs. Most of the carbonates present within the lower Desert Creek and Ismay have retained a marine-influenced carbon isotope geochemistry throughout marine cementation as well as through post-burial recycling of marine carbonate components during dolomitization, stylolitization, dissolution, and late cementation. Meteoric waters do not appear to have had any effect on the composition of the dolomites in these zones. Light oxygen values obtained from reservoir samples for wells located along the margins or flanks of Bug field may be indicative of exposure to higher temperatures, to fluids depleted in {sup 18}O relative to sea water, or to hypersaline waters during burial diagenesis. The samples from Bug field with the lightest oxygen isotope compositions are from wells that have produced significantly greater amounts of hydrocarbons. There is no significant difference between the oxygen isotope compositions from lower Desert Creek dolomite samples in Bug field and the upper Ismay limestones and dolomites from Cherokee field. Carbon isotopic compositions for samples from Patterson Canyon field can be divided into two populations: isotopically heavier mound cement and isotopically lighter oolite and banded cement. Technology transfer activities consisted of exhibiting a booth display of project materials at the annual national convention of the American Association of Petroleum Geologists, a technical presentation, a core workshop, and publications. The project home page was updated on the Utah Geological Survey Internet web site.

Thomas C. Chidsey; Kevin McClure; Craig D. Morgan

2003-10-05T23:59:59.000Z

29

Contamination Control Techniques  

SciTech Connect

Welcome to a workshop on contamination Control techniques. This work shop is designed for about two hours. Attendee participation is encouraged during the workshop. We will address different topics within contamination control techniques; present processes, products and equipment used here at Hanford and then open the floor to you, the attendees for your input on the topics.

EBY, J.L.

2000-05-16T23:59:59.000Z

30

Applied Science/Techniques  

NLE Websites -- All DOE Office Websites (Extended Search)

Applied Science/Techniques Print Applied Science/Techniques Print The ALS is an excellent incubator of new scientific techniques and instrumentation. Many of the technical advances that make the ALS a world-class soft x-ray facility are developed at the ALS itself. The optical components in use at the ALS-mirrors and lenses optimized for x-ray wavelengths-require incredibly high-precision surfaces and patterns (often formed through extreme ultraviolet lithography at the ALS) and must undergo rigorous calibration and testing provided by beamlines and equipment from the ALS's Optical Metrology Lab and Berkeley Lab's Center for X-Ray Optics. New and/or continuously improved experimental techniques are also a crucial element of a thriving scientific facility. At the ALS, examples of such "technique" highlights include developments in lensless imaging, soft x-ray tomography, high-throughput protein analysis, and high-power coherent terahertz radiation.

31

Geochemical Techniques | Open Energy Information  

Open Energy Info (EERE)

Geochemical Techniques Geochemical Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Geochemical Techniques Details Activities (0) Areas (0) Regions (0) NEPA(1) Exploration Technique Information Exploration Group: Geochemical Techniques Exploration Sub Group: None Parent Exploration Technique: Exploration Techniques Information Provided by Technique Lithology: Stratigraphic/Structural: Hydrological: Thermal: Dictionary.png Geochemical Techniques: No definition has been provided for this term. Add a Definition Related Techniques Geochemical Techniques Geochemical Data Analysis Geothermometry Gas Geothermometry Isotope Geothermometry Liquid Geothermometry Cation Geothermometers Multicomponent Geothermometers Silica Geothermometers Thermal Ion Dispersion

32

Electrical Techniques | Open Energy Information  

Open Energy Info (EERE)

Electrical Techniques Electrical Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Electrical Techniques Details Activities (0) Areas (0) Regions (0) NEPA(1) Exploration Technique Information Exploration Group: Geophysical Techniques Exploration Sub Group: Electrical Techniques Parent Exploration Technique: Geophysical Techniques Information Provided by Technique Lithology: Rock composition, mineral and clay content Stratigraphic/Structural: Detection of permeable pathways, fracture zones, faults Hydrological: Resistivity influenced by porosity, grain size distribution, permeability, fluid saturation, fluid type and phase state of the pore water Thermal: Resistivity influenced by temperature Dictionary.png Electrical Techniques: Electrical techniques aim to image the electrical resistivity of the

33

Using Structured Interviewing Techniques  

E-Print Network (OSTI)

GAO assists congressional decisionmakers in their deliberative process by furnishing analytical information on issues and options under consideration. Many diverse methodologies are needed to develop sound and timely answers to the questions that are posed by the Congress. To provide GAO evaluators with basic information about the more commonly used methodologies, GAO’s policy guidance includes documents such as methodology transfer papers and technical guidelines, This methodology transfer paper on using structured interviewing techniques discusses how GAO evaluators should incorporate structured interview techniques when appropriate to performing our work. It explains when these techniques should be

Gao/pemd-. Preface; Werner Grosshans

1991-01-01T23:59:59.000Z

34

Magnetotelluric Techniques | Open Energy Information  

Open Energy Info (EERE)

Magnetotelluric Techniques Magnetotelluric Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Magnetotelluric Techniques Details Activities (0) Areas (0) Regions (0) NEPA(2) Exploration Technique Information Exploration Group: Geophysical Techniques Exploration Sub Group: Electrical Techniques Parent Exploration Technique: Electromagnetic Sounding Techniques Information Provided by Technique Lithology: Rock composition, mineral and clay content Stratigraphic/Structural: Detection of permeable pathways, fracture zones, faults Hydrological: Resistivity influenced by porosity, grain size distribution, permeability, fluid saturation, fluid type and phase state of the pore water Thermal: Resistivity influenced by temperature Dictionary.png Magnetotelluric Techniques:

35

Downhole Techniques | Open Energy Information  

Open Energy Info (EERE)

Downhole Techniques Downhole Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Downhole Techniques Details Activities (0) Areas (0) Regions (0) NEPA(7) Exploration Technique Information Exploration Group: Downhole Techniques Exploration Sub Group: None Parent Exploration Technique: Exploration Techniques Information Provided by Technique Lithology: Determination of lithology, grain size Stratigraphic/Structural: Thickness and geometry of rock strata, fracture identification Hydrological: Porosity, permeability, water saturation Thermal: Formation temperature with depth Dictionary.png Downhole Techniques: Downhole techniques are measurements collected from a borehole environment which provide information regarding the character of formations and fluids

36

Geophysical Techniques | Open Energy Information  

Open Energy Info (EERE)

Geophysical Techniques Geophysical Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Geophysical Techniques Details Activities (2) Areas (1) Regions (0) NEPA(4) Exploration Technique Information Exploration Group: Geophysical Techniques Exploration Sub Group: None Parent Exploration Technique: Exploration Techniques Information Provided by Technique Lithology: may be inferred Stratigraphic/Structural: may be inferred Hydrological: may be inferred Thermal: may be inferred Dictionary.png Geophysical Techniques: Geophysics is the study of the structure and composition of the earth's interior. Other definitions:Wikipedia Reegle Introduction Geophysical techniques measure physical phenomena of the earth such as gravity, magnetism, elastic waves, electrical and electromagnetic waves.

37

Modeling Techniques | Open Energy Information  

Open Energy Info (EERE)

Modeling Techniques Modeling Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Modeling Techniques Details Activities (0) Areas (0) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Data and Modeling Techniques Exploration Sub Group: Modeling Techniques Parent Exploration Technique: Data and Modeling Techniques Information Provided by Technique Lithology: Rock types, rock chemistry, stratigraphic layer organization Stratigraphic/Structural: Stress fields and magnitudes, location and shape of permeable and non-permeable structures, faults, fracture patterns Hydrological: Visualization and prediction of the flow patterns and characteristics of geothermal fluids, hydrothermal fluid flow characteristics, up-flow patterns

38

Seismic Techniques | Open Energy Information  

Open Energy Info (EERE)

Seismic Techniques Seismic Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Seismic Techniques Details Activities (0) Areas (0) Regions (0) NEPA(10) Exploration Technique Information Exploration Group: Geophysical Techniques Exploration Sub Group: Seismic Techniques Parent Exploration Technique: Geophysical Techniques Information Provided by Technique Lithology: Rock unit density influences elastic wave velocities. Stratigraphic/Structural: Structural geology- faults, folds, grabens, horst blocks, sedimentary layering, discontinuities, etc. Hydrological: Combining compressional and shear wave results can indicate the presence of fluid saturation in the formation. Thermal: High temperatures and pressure impact the compressional and shear wave velocities.

39

Resin infiltration transfer technique  

DOE Patents (OSTI)

A process has been developed for fabricating composite structures using either reaction forming or polymer infiltration and pyrolysis techniques to densify the composite matrix. The matrix and reinforcement materials of choice can include, but are not limited to, silicon carbide (SiC) and zirconium carbide (ZrC). The novel process can be used to fabricate complex, net-shape or near-net shape, high-quality ceramic composites with a crack-free matrix.

Miller, David V. (Pittsburgh, PA); Baranwal, Rita (Glenshaw, PA)

2009-12-08T23:59:59.000Z

40

Technique Subgroupings Spectroscopy  

NLE Websites -- All DOE Office Websites (Extended Search)

and NSLS-II beamlines according to DOE Technique Scheme and NSLS-II beamlines according to DOE Technique Scheme Technique Subgroupings Spectroscopy 01 - Low Energy Spectroscopy Infrared Photoemission U12IR, U4IR / MET* U5UA, U13 / ESM 02 - Soft X-Ray Spectroscopy Soft X-ray Spectroscopy Tender XAS U4B, U7A, X24A / SST, SSS* X15B, X19A / TES* 03 - Hard X-ray Spectroscopy EXAFS X3A, X3B, X11A, X11B, X18A, X18B, X23A2 / ISS, BMM, QAS*, XAS* 04 - Optics/Calibration/Metrology U3C,X8A/ OFT,MID Scattering 05 X-ray Diffraction X-Ray Powder Diffraction Extreme Conditions Energy Dispersive Micro-Beam Diffraction X7B,X10B,X14A,X16C,X17A / XPD,IXD* X17B2,X17B3,X17C / XPD, TEC*, 4DE* X17B1, X17B2 / NA X13B / MXD* 06 MX, footprinting Protein Crystallography X-ray footprinting X4A, X4C, X6A, X12B, X12C, X25, X29 / FMX, AMX, NYX;

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they are not comprehensive nor are they the most current set.
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41

Techniques for Measuring Residual Stresses  

Science Conference Proceedings (OSTI)

Table 1   Classification of techniques for measuring residual stress...stress A-1 Stress-relaxation techniques using electric

42

Techniques for Measuring Residual Stresses  

Science Conference Proceedings (OSTI)

Table 1   Classification of techniques for measuring residual stress...stress A-1 Stress relaxation techniques using electric

43

Category:Gravity Techniques | Open Energy Information  

Open Energy Info (EERE)

Techniques page? For detailed information on Gravity Techniques, click here. Category:Gravity Techniques Add.png Add a new Gravity Techniques Technique Pages in category "Gravity...

44

Development Drilling | Open Energy Information  

Open Energy Info (EERE)

Page Page Edit with form History Facebook icon Twitter icon » Development Drilling Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Development Drilling Details Activities (1) Areas (1) Regions (0) NEPA(9) Exploration Technique Information Exploration Group: Drilling Techniques Exploration Sub Group: Development Drilling Parent Exploration Technique: Drilling Techniques Information Provided by Technique Lithology: Identify lithology and mineralization, provide core samples and rock cuttings Stratigraphic/Structural: Retrieved samples can be used to identify stratigraphy and structural features such as fracture networks or faults Hydrological: -Water samples can be used for geochemical analysis -Fluid pressures can be used to estimate flow rates

45

Exploration Drilling | Open Energy Information  

Open Energy Info (EERE)

Exploration Drilling Exploration Drilling Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Exploration Drilling Details Activities (0) Areas (0) Regions (0) NEPA(15) Exploration Technique Information Exploration Group: Drilling Techniques Exploration Sub Group: Exploration Drilling‎ Parent Exploration Technique: Drilling Techniques Information Provided by Technique Lithology: Identify lithology and mineralization, provide core samples and rock cuttings Stratigraphic/Structural: Retrieved samples can be used to identify stratigraphy and structural features such as fracture networks or faults Hydrological: -Water samples can be used for geochemical analysis -Fluid pressures can be used to estimate flow rates Thermal: -Temperatures can be measured within the hole

46

Magnetic Techniques | Open Energy Information  

Open Energy Info (EERE)

Magnetic Techniques Magnetic Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Magnetic Techniques Details Activities (0) Areas (0) Regions (0) NEPA(1) Exploration Technique Information Exploration Group: Geophysical Techniques Exploration Sub Group: Magnetic Techniques Parent Exploration Technique: Geophysical Techniques Information Provided by Technique Lithology: Presence of magnetic minerals such as magnetite. Stratigraphic/Structural: Mapping of basement structures, horst blocks, fault systems, fracture zones, dykes and intrusions. Hydrological: The circulation of hydrothermal fluid may impact the magnetic susceptibility of rocks. Thermal: Rocks lose their magnetic properties at the Curie temperature (580° C for magnetite) [1] and, upon cooling, remagnetize in the present magnetic field orientation. The Curie point depth in the subsurface may be determined in a magnetic survey to provide information about hydrothermal activity in a region.

47

Gravity Techniques | Open Energy Information  

Open Energy Info (EERE)

Gravity Techniques Gravity Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Gravity Techniques Details Activities (0) Areas (0) Regions (0) NEPA(1) Exploration Technique Information Exploration Group: Geophysical Techniques Exploration Sub Group: Gravity Techniques Parent Exploration Technique: Geophysical Techniques Information Provided by Technique Lithology: Distribution of density in the subsurface enables inference of rock type. Stratigraphic/Structural: Delineation of steeply dipping formations, geological discontinuities and faults, intrusions and the deposition of silicates due to hydrothermal activity. Hydrological: Density of sedimentary rocks are strongly influenced by fluid contained within pore space. Dry bulk density refers to the rock with no moisture, while the wet bulk density accounts for water saturation; fluid content may alter density by up to 30%.(Sharma, 1997)

48

Chemical logging- a geothermal technique | Open Energy Information  

Open Energy Info (EERE)

logging- a geothermal technique logging- a geothermal technique Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: Chemical logging- a geothermal technique Details Activities (1) Areas (1) Regions (0) Abstract: Chemical logging studies conducted at the Department of Energy's Raft River Geothermal Test Site in south central Idaho resulted in the development of a technique to assist in geothermal well drilling and resource development. Calcium-alkalinity ratios plotted versus drill depth assisted in defining warm and hot water aquifers. Correlations between the calcium-alkalinity log and lithologic logs were used to determine aquifer types and detection of hot water zones 15 to 120 m before drill penetration. INEL-1 at the Idaho National Engineering Laboratory site in

49

Electromagnetic Techniques | Open Energy Information  

Open Energy Info (EERE)

form form View source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit with form History Facebook icon Twitter icon » Electromagnetic Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Electromagnetic Techniques Details Activities (0) Areas (0) Regions (0) NEPA(5) Exploration Technique Information Exploration Group: Geophysical Techniques Exploration Sub Group: Electrical Techniques Parent Exploration Technique: Electrical Techniques Information Provided by Technique Lithology: Rock composition, mineral and clay content Stratigraphic/Structural: Detection of permeable pathways, fracture zones, faults Hydrological: Resistivity influenced by porosity, grain size distribution, permeability, fluid saturation, fluid type and phase state of the pore water

50

Field Techniques | Open Energy Information  

Open Energy Info (EERE)

Field Techniques Field Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Field Techniques Details Activities (0) Areas (0) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Field Techniques Exploration Sub Group: None Parent Exploration Technique: Exploration Techniques Information Provided by Technique Lithology: Map surface geology and hydrothermal alteration. Rock samples are used to define lithology. Field and lab analyses can be used to measure the chemical and isotopic constituents of rock samples. Bulk and trace element analysis of rocks, minerals, and sediments. Identify and document surface geology and mineralogy. Rapid and unambiguous identification of unknown minerals.[1] Stratigraphic/Structural: Locates active faults in the area of interest. Map fault and fracture patterns, kinematic information. Can reveal relatively high permeability zones. Provides information about the time and environment which formed a particular geologic unit. Microscopic rock textures can be used to estimate the history of stress and strain, and/or faulting.

51

Videogrammetric Model Deformation Measurement Technique  

Science Conference Proceedings (OSTI)

The theory, methods, and applications of the videogrammetric model deformation (VMD) measurement technique used at NASA for wind tunnel testing are presented. The VMD technique, based on non-topographic photogrammetry, can determine static and dynamic ...

Burner A. W.; Liu Tianshu

2001-07-01T23:59:59.000Z

52

Diagnostics Techniques of Power Transformer  

Science Conference Proceedings (OSTI)

This paper provides the information on the diagnostics techniques for condition monitoring of power transformer (PT). This paper deals with the practical importance of the transformer diagnostic in the Electrical Engineering field. A review has been ... Keywords: temperature, condition monitoring, diagnostics methods, paper analysis techniques, oil analysis techniques

Piush Verma; Y. R. Sood; Jashandeep Singh

2009-12-01T23:59:59.000Z

53

Dose Reduction Techniques  

SciTech Connect

As radiation safety specialists, one of the things we are required to do is evaluate tools, equipment, materials and work practices and decide whether the use of these products or work practices will reduce radiation dose or risk to the environment. There is a tendency for many workers that work with radioactive material to accomplish radiological work the same way they have always done it rather than look for new technology or change their work practices. New technology is being developed all the time that can make radiological work easier and result in less radiation dose to the worker or reduce the possibility that contamination will be spread to the environment. As we discuss the various tools and techniques that reduce radiation dose, keep in mind that the radiological controls should be reasonable. We can not always get the dose to zero, so we must try to accomplish the work efficiently and cost-effectively. There are times we may have to accept there is only so much you can do. The goal is to do the smart things that protect the worker but do not hinder him while the task is being accomplished. In addition, we should not demand that large amounts of money be spent for equipment that has marginal value in order to save a few millirem. We have broken the handout into sections that should simplify the presentation. Time, distance, shielding, and source reduction are methods used to reduce dose and are covered in Part I on work execution. We then look at operational considerations, radiological design parameters, and discuss the characteristics of personnel who deal with ALARA. This handout should give you an overview of what it takes to have an effective dose reduction program.

WAGGONER, L.O.

2000-05-16T23:59:59.000Z

54

Techniques in Broadband Interferometry  

SciTech Connect

This is a compilation of my patents issued from 1997 to 2002, generally describing interferometer techniques that modify the coherence properties of broad-bandwidth light and other waves, with applications to Doppler velocimetry, range finding, imaging and spectroscopy. Patents are tedious to read in their original form. In an effort to improve their readability I have embedded the Figures throughout the manuscript, put the Figure captions underneath the Figures, and added section headings. Otherwise I have resisted the temptation to modify the words, though I found many places which could use healthy editing. There may be minor differences with the official versions issued by the US Patent and Trademark Office, particularly in the claims sections. In my shock physics work I measured the velocities of targets impacted by flyer plates by illuminating them with laser light and analyzing the reflected light with an interferometer. Small wavelength changes caused by the target motion (Doppler effect) were converted into fringe shifts by the interferometer. Lasers having long coherence lengths were required for the illumination. While lasers are certainly bright sources, and their collimated beams are convenient to work with, they are expensive. Particularly if one needs to illuminate a wide surface area, then large amounts of power are needed. Orders of magnitude more power per dollar can be obtained from a simple flashlamp, or for that matter, a 50 cent light bulb. Yet these inexpensive sources cannot practically be used for Doppler velocimetry because their coherence length is extremely short, i.e. their bandwidth is much too wide. Hence the motivation for patents 1 & 2 is a method (White Light Velocimetry) for allowing use of these powerful but incoherent lamps for interferometry. The coherence of the illumination is modified by passing it through a preparatory interferometer.

Erskine, D J

2004-01-04T23:59:59.000Z

55

Managed Pressure Drilling Candidate Selection  

E-Print Network (OSTI)

Managed Pressure Drilling now at the pinnacle of the 'Oil Well Drilling' evolution tree, has itself been coined in 2003. It is an umbrella term for a few new drilling techniques and some preexisting drilling techniques, all of them aiming to solve several drilling problems, including non-productive time and/or drilling flat time issues. These techniques, now sub-classifications of Managed Pressure Drilling, are referred to as 'Variations' and 'Methods' of Managed Pressure Drilling. Although using Managed Pressure Drilling for drilling wells has several benefits, not all wells that seem a potential candidate for Managed Pressure Drilling, need Managed Pressure Drilling. The drilling industry has numerous simulators and software models to perform drilling hydraulics calculations and simulations. Most of them are designed for conventional well hydraulics, while some can perform Underbalanced Drilling calculations, and a select few can perform Managed Pressure Drilling calculations. Most of the few available Managed Pressure Drilling models are modified Underbalanced Drilling versions that fit Managed Pressure Drilling needs. However, none of them focus on Managed Pressure Drilling and its candidate selection alone. An 'Managed Pressure Drilling Candidate Selection Model and software' that can act as a preliminary screen to determine the utility of Managed Pressure Drilling for potential candidate wells are developed as a part of this research dissertation. The model and a flow diagram identify the key steps in candidate selection. The software performs the basic hydraulic calculations and provides useful results in the form of tables, plots and graphs that would help in making better engineering decisions. An additional Managed Pressure Drilling worldwide wells database with basic information on a few Managed Pressure Drilling projects has also been compiled that can act as a basic guide on the Managed Pressure Drilling variation and project frequencies and aid in Managed Pressure Drilling candidate selection.

Nauduri, Anantha S.

2009-05-01T23:59:59.000Z

56

Animation of JILA Frequency Comb Spectroscopy Technique  

Science Conference Proceedings (OSTI)

Animation of JILA Frequency Comb Spectroscopy Technique. The new JILA "frequency comb spectroscopy" technique ...

2012-08-17T23:59:59.000Z

57

Formation Testing Techniques | Open Energy Information  

Open Energy Info (EERE)

Formation Testing Techniques Formation Testing Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Formation Testing Techniques Details Activities (0) Areas (0) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Downhole Techniques Exploration Sub Group: Formation Testing Techniques Parent Exploration Technique: Downhole Techniques Information Provided by Technique Lithology: Stratigraphic/Structural: Hydrological: Thermal: Dictionary.png Formation Testing Techniques: No definition has been provided for this term. Add a Definition References No exploration activities found. Print PDF Retrieved from "http://en.openei.org/w/index.php?title=Formation_Testing_Techniques&oldid=601973" Categories: Downhole Techniques Exploration Techniques

58

Category:Seismic Techniques | Open Energy Information  

Open Energy Info (EERE)

2 subcategories, out of 2 total. A Active Seismic Techniques 2 pages P Passive Seismic Techniques 2 pages Pages in category "Seismic Techniques" The following 2...

59

Definition: Electrical Techniques | Open Energy Information  

Open Energy Info (EERE)

Techniques Jump to: navigation, search Dictionary.png Electrical Techniques Electrical techniques aim to image the electrical resistivity of the subsurface through the measurement...

60

Category:Data Techniques | Open Energy Information  

Open Energy Info (EERE)

Data Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Geothermalpower.jpg Looking for the Data Techniques page? For detailed information on Data Techniques...

Note: This page contains sample records for the topic "techniques drilling techniques" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Proceedings of the twelfth conference on explosives and blasting techniques  

SciTech Connect

This book presents the papers given at a conference on the use of explosive fracturing to construct underground energy facilities. Topics considered at the conference included the Atomic Energy of Canada Limited's underground research laboratory, drilling and blasting techniques for canals, pipeline trenches, blasting costs, underground coal mining, presplitting of granite, energy consumption, and overburden blasting vibrations.

Konya, C.J.

1986-01-01T23:59:59.000Z

62

Twistor inspired techniques in QCD  

Science Conference Proceedings (OSTI)

I present a short review of the new twistor inspired techniques in perturbative QCD, which are the result of Witten's conjecture of a duality between twistors and string theory. I give an introduction to the main two tree-level techniques, the BCFW recursion and the CSW formalism, and show how the idea of using on-shell QCD amplitudes evaluated for complex momenta can lead to efficient techniques to perform analytic computations. Finally, I briefly discuss how these ideas can be applied to loop calculations if they are combined to the generalized unitarity approach.

Duhr, C. [Center for Particle Physics and Phenomenology (CP3), Universite catholique de Louvain, B-1348 Louvain-la-Neuve (Belgium)

2008-08-29T23:59:59.000Z

63

Tools & Techniques for Failure Analysis  

Science Conference Proceedings (OSTI)

Oct 31, 2013 ... Failure Analysis and Prevention: Tools & Techniques for Failure ... As lithium-ion battery technology continues to advance and is adopted in diverse markets, ... fracture origin and an understanding of the fracture event energy.

64

Drilling for energy resources  

DOE Green Energy (OSTI)

Drilling is integral to the exploration, development, and production of most energy resources. Oil and natural gas, which are dependent on drilling technology, together account for about 77% of the energy sources consumed in the US. Thus, the limitations of current drilling technology also restrict the rate at which new energy supplies can be found, extracted, and brought to the marketplace. The purpose of the study reported was to examine current drilling technology, suggest areas where additional research and development (R and D) might significantly increase drilling rates and capabilities, and suggest a strategy for improving drilling technology. An overview is provided of the US drilling industry. The drilling equipment and techniques now used for finding and recovering oil, natural gas, coal, shale oil, nuclear fuels, and geothermal energy are described. Although by no means exhaustive, these descriptions provide the background necessary to adequately understand the problems inherent in attempts to increase instantaneous and overall drilling rates.

Not Available

1976-01-01T23:59:59.000Z

65

Well Log Techniques | Open Energy Information  

Open Energy Info (EERE)

Well Log Techniques Well Log Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Well Log Techniques Details Activities (4) Areas (4) Regions (1) NEPA(0) Exploration Technique Information Exploration Group: Downhole Techniques Exploration Sub Group: Well Log Techniques Parent Exploration Technique: Downhole Techniques Information Provided by Technique Lithology: depth and thickness of formations; lithology and porosity can be inferred Stratigraphic/Structural: reservoir thickness, reservoir geometry, borehole geometry Hydrological: permeability and fluid composition can be inferred Thermal: direct temperature measurements; thermal conductivity and heat capacity Dictionary.png Well Log Techniques: Well logging is the measurement of formation properties versus depth in a

66

Electromagnetic Sounding Techniques | Open Energy Information  

Open Energy Info (EERE)

Electromagnetic Sounding Techniques Electromagnetic Sounding Techniques (Redirected from Electromagnetic Sounding Methods) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Electromagnetic Sounding Techniques Details Activities (1) Areas (1) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Geophysical Techniques Exploration Sub Group: Electrical Techniques Parent Exploration Technique: Ground Electromagnetic Techniques Information Provided by Technique Lithology: Rock composition, mineral and clay content Stratigraphic/Structural: Detection of permeable pathways, fracture zones, faults Hydrological: Resistivity influenced by porosity, grain size distribution, permeability, fluid saturation, fluid type and phase state of the pore water

67

Remote Sensing Techniques | Open Energy Information  

Open Energy Info (EERE)

Remote Sensing Techniques Remote Sensing Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Remote Sensing Techniques Details Activities (0) Areas (0) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Remote Sensing Techniques Exploration Sub Group: None Parent Exploration Technique: Exploration Techniques Information Provided by Technique Lithology: Stratigraphic/Structural: Hydrological: Thermal: Dictionary.png Remote Sensing Techniques: Remote sensing utilizes satellite and/or airborne based sensors to collect information about a given object or area. Remote sensing data collection methods can be passive or active. Passive sensors (e.g., spectral imagers) detect natural radiation that is emitted or reflected by the object or area

68

Active Seismic Techniques | Open Energy Information  

Open Energy Info (EERE)

Active Seismic Techniques Active Seismic Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Active Seismic Techniques Details Activities (0) Areas (0) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Geophysical Techniques Exploration Sub Group: Seismic Techniques Parent Exploration Technique: Seismic Techniques Information Provided by Technique Lithology: Rock unit density influences elastic wave velocities. Stratigraphic/Structural: Structural geology- faults, folds, grabens, horst blocks, sedimentary layering, discontinuities, etc. Hydrological: Combining compressional and shear wave results can indicate the presence of fluid saturation in the formation. Thermal: High temperatures and pressure impact the compressional and shear wave velocities.

69

Electromagnetic Profiling Techniques | Open Energy Information  

Open Energy Info (EERE)

Electromagnetic Profiling Techniques Electromagnetic Profiling Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Electromagnetic Profiling Techniques Details Activities (0) Areas (0) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Geophysical Techniques Exploration Sub Group: Electrical Techniques Parent Exploration Technique: Ground Electromagnetic Techniques Information Provided by Technique Lithology: Rock composition, mineral and clay content Stratigraphic/Structural: Detection of permeable pathways, fracture zones, faults Hydrological: Resistivity influenced by porosity, grain size distribution, permeability, fluid saturation, fluid type and phase state of the pore water Thermal: Resistivity influenced by temperature

70

Well Testing Techniques | Open Energy Information  

Open Energy Info (EERE)

Well Testing Techniques Well Testing Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Well Testing Techniques Details Activities (0) Areas (0) Regions (0) NEPA(17) Exploration Technique Information Exploration Group: Downhole Techniques Exploration Sub Group: Well Testing Techniques Parent Exploration Technique: Downhole Techniques Information Provided by Technique Lithology: Enable estimation of in-situ reservoir elastic parameters Stratigraphic/Structural: Fracture distribution, formation permeability, and ambient tectonic stresses Hydrological: provides information on permeability, location of permeable zones recharge rates, flow rates, fluid flow direction, hydrologic connections, storativity, reservoir pressures, fluid chemistry, and scaling.

71

Ground Electromagnetic Techniques | Open Energy Information  

Open Energy Info (EERE)

Ground Electromagnetic Techniques Ground Electromagnetic Techniques (Redirected from Ground Electromagnetic Methods) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Ground Electromagnetic Techniques Details Activities (0) Areas (0) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Geophysical Techniques Exploration Sub Group: Electrical Techniques Parent Exploration Technique: Electromagnetic Techniques Information Provided by Technique Lithology: Rock composition, mineral and clay content Stratigraphic/Structural: Detection of permeable pathways, fracture zones, faults Hydrological: Resistivity influenced by porosity, grain size distribution, permeability, fluid saturation, fluid type and phase state of the pore water Thermal: Resistivity influenced by temperature

72

Electromagnetic Sounding Techniques | Open Energy Information  

Open Energy Info (EERE)

Electromagnetic Sounding Techniques Electromagnetic Sounding Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Electromagnetic Sounding Techniques Details Activities (1) Areas (1) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Geophysical Techniques Exploration Sub Group: Electrical Techniques Parent Exploration Technique: Ground Electromagnetic Techniques Information Provided by Technique Lithology: Rock composition, mineral and clay content Stratigraphic/Structural: Detection of permeable pathways, fracture zones, faults Hydrological: Resistivity influenced by porosity, grain size distribution, permeability, fluid saturation, fluid type and phase state of the pore water Thermal: Resistivity influenced by temperature

73

Borehole Seismic Techniques | Open Energy Information  

Open Energy Info (EERE)

Borehole Seismic Techniques Borehole Seismic Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Borehole Seismic Techniques Details Activities (0) Areas (0) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Downhole Techniques Exploration Sub Group: Borehole Seismic Techniques Parent Exploration Technique: Downhole Techniques Information Provided by Technique Lithology: Rock unit density influences elastic wave velocities Stratigraphic/Structural: Structural geology- faults, folds, grabens, horst blocks, sedimentary layering, discontinuities, etc Hydrological: Combining compressional and shear wave results can indicate the presence of fluid saturation in the formation Thermal: High temperatures and pressure impact the compressional and shear wave velocities

74

Ground Electromagnetic Techniques | Open Energy Information  

Open Energy Info (EERE)

Ground Electromagnetic Techniques Ground Electromagnetic Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Ground Electromagnetic Techniques Details Activities (0) Areas (0) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Geophysical Techniques Exploration Sub Group: Electrical Techniques Parent Exploration Technique: Electromagnetic Techniques Information Provided by Technique Lithology: Rock composition, mineral and clay content Stratigraphic/Structural: Detection of permeable pathways, fracture zones, faults Hydrological: Resistivity influenced by porosity, grain size distribution, permeability, fluid saturation, fluid type and phase state of the pore water Thermal: Resistivity influenced by temperature Dictionary.png

75

Passive Seismic Techniques | Open Energy Information  

Open Energy Info (EERE)

Passive Seismic Techniques Passive Seismic Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Passive Seismic Techniques Details Activities (0) Areas (0) Regions (0) NEPA(4) Exploration Technique Information Exploration Group: Geophysical Techniques Exploration Sub Group: Seismic Techniques Parent Exploration Technique: Seismic Techniques Information Provided by Technique Lithology: Rock unit density influences elastic wave velocities. Stratigraphic/Structural: Structural geology- faults, folds, grabens, horst blocks, sedimentary layering, discontinuities, etc. Hydrological: Combining compressional and shear wave results can indicate the presence of fluid saturation in the formation. Thermal: High temperatures and pressure impact the compressional and shear wave velocities.

76

APS 7-BM Beamline: Techniques  

NLE Websites -- All DOE Office Websites (Extended Search)

Motivation Motivation The major thrust of the 7-BM beamline is the application of synchrotron radiation tools to examine complex fluid flowfields. Two major techniques are applied: radiography and x-ray fluorescence spectroscopy. While optical techniques are often ideally suited to the study of fluid flowfields, there are certain flowfields for which optical diagnostics have significant challenges. These include: Multiphase flows: Visible light interacts strongly with phase boundaries. This leads to strong refraction, scattering, and attenuation of light. These effects hinder quantitative measurements of dense multiphase flowfields. Opaque media. Flows with strong refractive effects. Luminous flames: The strong light emission from sooting flames can hinder certain optical diagnostics.

77

Erasure Techniques in MRD codes  

E-Print Network (OSTI)

This book is organized into six chapters. The first chapter introduces the basic algebraic structures essential to make this book a self contained one. Algebraic linear codes and their basic properties are discussed in chapter two. In chapter three the authors study the basic properties of erasure decoding in maximum rank distance codes. Some decoding techniques about MRD codes are described and discussed in chapter four of this book. Rank distance codes with complementary duals and MRD codes with complementary duals are introduced and their applications are discussed. Chapter five introduces the notion of integer rank distance codes. The final chapter introduces some concatenation techniques.

W. B. Vasantha Kandasamy; Florentin Smarandache; R. Sujatha; R. S. Raja Durai

2012-05-03T23:59:59.000Z

78

Technical education and brainstorming technique  

Science Conference Proceedings (OSTI)

The brainstorming technique used for software projects development is presented as a powerful solution for teaching and research activity in the technical domain. Brainstorming was introduced in the technical domain as an efficient method that was developed ... Keywords: alternative education, brainstorming, design patterns, enneagram, resonance, software engineering

Mircea-Florin Vaida

2007-03-01T23:59:59.000Z

79

Analyzing Regression Test Selection Techniques  

Science Conference Proceedings (OSTI)

AbstractżRegression testing is a necessary but expensive maintenance activity aimed at showing that code has not been adversely affected by changes. Regression test selection techniques reuse tests from an existing test suite to test a modified program. ... Keywords: Software maintenance, regression testing, selective retest, regression test selection.

Gregg Rothermel; Mary Jean Harrold

1996-08-01T23:59:59.000Z

80

Data and Modeling Techniques | Open Energy Information  

Open Energy Info (EERE)

and Modeling Techniques and Modeling Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Data and Modeling Techniques Details Activities (0) Areas (0) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Data and Modeling Techniques Exploration Sub Group: None Parent Exploration Technique: Exploration Techniques Information Provided by Technique Lithology: Rock types, rock chemistry, stratigraphic layer organization Stratigraphic/Structural: Stress fields and magnitudes, location and shape of permeable and non-permeable structures, faults, and fracture patterns Hydrological: Visualization and prediction of the flow patterns and characteristics of geothermal fluids, hydrothermal fluid flow characteristics, up-flow patterns

Note: This page contains sample records for the topic "techniques drilling techniques" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Petroleum Engineering Techniques for HLW Disposal  

Science Conference Proceedings (OSTI)

This paper describes why petroleum engineering techniques are of importance and can be used for underground disposal of HLW (high-level radioactive waste). It is focused on rock salt as a geological host medium in combination with disposal of the HLW canisters in boreholes drilled from the surface. Both permanent disposal and disposal with the option to retrieve the waste are considered. The paper starts with a description of the disposal procedure. Next disposal in deep boreholes is treated. Then the possible use of deviated boreholes and of multiple boreholes is discussed. Also waste isolation aspects and the implications of the HLW heat generation are treated. It appears that the use of deep boreholes can be beneficial, and also that--to a certain extent--borehole deviation offers possibilities. The benefits of using multiple boreholes are questionable for permanent disposal, while this technique cannot be applied for retrievable disposal. For the use of casing material, the additional temperature rise due to the HLW heat generation must be taken into account.

van den Broek, W. M. G. T.

2002-02-25T23:59:59.000Z

82

Category:Geophysical Techniques | Open Energy Information  

Open Energy Info (EERE)

Techniques Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Geothermalpower.jpg Looking for the Geophysical Techniques page? For detailed information on Geophysical Techniques as exploration techniques, click here. Category:Geophysical Techniques Add.png Add a new Geophysical Techniques Technique Subcategories This category has the following 4 subcategories, out of 4 total. E [+] Electrical Techniques‎ (2 categories) 5 pages G [×] Gravity Techniques‎ 3 pages M [×] Magnetic Techniques‎ 3 pages S [+] Seismic Techniques‎ (2 categories) 2 pages Pages in category "Geophysical Techniques" The following 5 pages are in this category, out of 5 total. D DC Resistivity Survey (Mise-Á-La-Masse) E Electrical Techniques G Gravity Techniques M Magnetic Techniques

83

Updated Satellite Technique to Forecast Heavy Snow  

Science Conference Proceedings (OSTI)

Certain satellite interpretation techniques have proven quite useful in the heavy snow forecast process. Those considered best are briefly reviewed, and another technique is introduced. This new technique was found to be most valuable in cyclonic ...

Edward C. Johnston

1995-06-01T23:59:59.000Z

84

Flip-chip and backside techniques.  

SciTech Connect

State-of-the-art techniques for failure localization and design modification through bulk silicon are essential for multi-level metallization and new, flip chip packaging methods. The tutorial reviews the transmission of light through silicon, sample preparation, and backside defect localization techniques that are both currently available and under development. The techniques covered include emission microscopy, scanning laser microscope based techniques (electrooptic techniques, LIVA and its derivatives), and other non-IR based tools (FIB, e-beam techniques, etc.).

Bernhard-Hofer, Karoline (Infineon, Regensburg, Germany); Barton, Daniel Lee; Cole, Edward Isaac, Jr.

2010-08-01T23:59:59.000Z

85

Low background techniques in XMASS  

SciTech Connect

The XMASS project aims to detect pp and {sup 7}Be solar neutrinos, neutrino-less double beta decay, and dark matter searches using ultra-pure liquid xenon. The first stage of XMASS project is concentrated on dark matter searches using 800 kg liquid xenon detector which requires low background and low threshold. Several techniques applied to XMASS detector for low background will be presented.

Takeda, Atsushi [Kamioka Observatory, ICRR, University of Tokyo, 456 Higashi-Mozumi, Kamioka-cho, Hida, Gifu, 506-1205 (Japan)

2011-04-27T23:59:59.000Z

86

Operational dose rate visualization techniques  

SciTech Connect

The analysis of the gamma ray dose rate in the vicinity of a radiation source can be greatly aided by the use of recent state-of-the-art visualization techniques. The method involves calculating dose rates at thousands of locations within a complex geometry system. This information is then processed to create contour plots of the dose rate. Additionally, when these contour plots are created, animations can be created that dynamically display the dose rate as the shields or sources are moved.

Schwarz, R.A.; Morford, R.J.; Carter, L.L.; Jones, G.B.; Greenborg, J.

1994-01-01T23:59:59.000Z

87

Category:Electrical Techniques | Open Energy Information  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Category Edit History Facebook icon Twitter icon » Category:Electrical Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Geothermalpower.jpg Looking for the Electrical Techniques page? For detailed information on Electrical Techniques as exploration techniques, click here. Category:Electrical Techniques Add.png Add a new Electrical Techniques Technique Subcategories This category has the following 2 subcategories, out of 2 total. D [+] Direct-Current Resistivity Survey‎ (2 categories) 3 pages E [+] Electromagnetic Techniques‎ (1 categories) 2 pages Pages in category "Electrical Techniques"

88

Definition: Modeling Techniques | Open Energy Information  

Open Energy Info (EERE)

Modeling Techniques Techniques that involve collecting data from one or more sources and developing a comprehensive representation of the data in a model View on...

89

Template:ExplorationTechnique | Open Energy Information  

Open Energy Info (EERE)

'ExplorationTechnique' template. To define a new Exploration 'ExplorationTechnique' template. To define a new Exploration Technique, please use the Exploration Technique Form. Parameters Definition - A link to the OpenEI definition of the technique (optional) ExplorationGroup - ExplorationSubGroup - ParentExplorationTechnique - parent technique for relationship tree LithologyInfo - the type of lithology information this technique could provide StratInfo - the type of stratigraphic and/or structural information this technique could provide HydroInfo - the type of hydrogeology information this technique could provide ThermalInfo - the type of temperature information this technique could provide EstimatedCostLowUSD - the estimated value only of the low end of the cost range (units described in CostUnit) EstimatedCostMedianUSD - the estimated value only of the median cost

90

SECURITY TECHNIQUES Chris J Mitchell1  

E-Print Network (OSTI)

SECURITY TECHNIQUES Chris J Mitchell1 Introduction In this paper we consider the range of security security has been exerted. However, the techniques described are of general applicability by a security technique; in doing so we will distinguish between security features and security techniques (or

Mitchell, Chris

91

Category:Field Techniques | Open Energy Information  

Open Energy Info (EERE)

Field Techniques Field Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Geothermalpower.jpg Looking for the Field Techniques page? For detailed information on Field Techniques as exploration techniques, click here. Category:Field Techniques Add.png Add a new Field Techniques Technique Subcategories This category has the following 2 subcategories, out of 2 total. D [×] Data Collection and Mapping‎ 5 pages F [+] Field Sampling‎ (2 categories) 4 pages Pages in category "Field Techniques" The following 4 pages are in this category, out of 4 total. D Data Collection and Mapping F Field Sampling H Hand-held X-Ray Fluorescence (XRF) P Portable X-Ray Diffraction (XRD) Retrieved from "http://en.openei.org/w/index.php?title=Category:Field_Techniques&oldid=689815"

92

Evaluating verbose query processing techniques  

E-Print Network (OSTI)

Verbose or long queries are a small but significant part of the query stream in web search, and are common in other applications such as collaborative question answering (CQA). Current search engines perform well with keyword queries but are not, in general, effective for verbose queries. In this paper, we examine query processing techniques which can be applied to verbose queries prior to submission to a search engine in order to improve the search engine’s results. We focus on verbose queries that have sentence-like structure, but are not simple “wh- ” questions, and assume the search engine is a “black box. ” We evaluated the output of two search engines using queries from a CQA service and our results show that, among a broad range of techniques, the most effective approach is to simply reduce the length of the query. This can be achieved effectively by removing “stop structure ” instead of only stop words. We show that the process of learning and removing stop structure from a query can be effectively automated.

Samuel Huston; W. Bruce Croft

2010-01-01T23:59:59.000Z

93

Repositioning of Covered Stents: The Grip Technique  

SciTech Connect

Introduction: Retrieval and repositioning of a stent deployed beyond its intended target region may be a difficult technical challenge. Materials and Methods: A balloon-mounted snare technique, a variant of the coaxial loop snare technique, is described. Results: The technique is described for the repositioning of a covered transjugular intrahepatic portosystemic shunt stent and a covered biliary stent. Conclusion: The balloon-mounted snare technique is a useful technique for retrieval of migrated stents.

Kirby, John Martin, E-mail: johnkirby@ireland.com [McMaster University Medical Center (Canada); Guo Xiaofeng [McGill University (Canada); Midia, Mehran [McMaster University Medical Center (Canada)

2011-06-15T23:59:59.000Z

94

Drilling Methods | Open Energy Information  

Open Energy Info (EERE)

Drilling Methods Drilling Methods Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Drilling Methods Details Activities (0) Areas (0) Regions (0) NEPA(5) Exploration Technique Information Exploration Group: Exploration Sub Group: None Parent Exploration Technique: Information Provided by Technique Lithology: Stratigraphic/Structural: Hydrological: Thermal: Dictionary.png Drilling Methods: No definition has been provided for this term. Add a Definition References No exploration activities found. Document # Analysis Type Applicant Geothermal Area Lead Agency District Office Field Office Mineral Manager Surface Manager Development Phase(s) Techniques CA-170-02-15 EA Mammoth Pacific Long Valley Caldera Geothermal Area BLM BLM Central California District Office BLM Bishop Field Office BLM Geothermal/Exploration Drilling Methods

95

Blind Source Separation Techniques for  

E-Print Network (OSTI)

Blind Source Separation techniques, based both on Independent Component Analysis and on second order statistics, are presented and compared for extracting partially hidden texts and textures in document images. Barely perceivable features may occur, for instance, in ancient documents previously erased and then re-written (palimpsests), or for transparency or seeping of ink from the reverse side, or from watermarks in the paper. Detecting these features can be of great importance to scholars and historians. In our approach, the document is modeled as the superposition of a number of source patterns, and a simplified linear mixture model is introduced for describing the relationship between these sources and multispectral views of the document itself. The problem of detecting the patterns that are barely perceivable in the visible color image is thus formulated as the one of separating the various patterns in the mixtures. Some examples from an extensive experimentation with real ancient documents are shown and commented.

Detecting Hidden Texts; Anna Tonazzini; Emanuele Salerno; Matteo Mochi; Luigi Bedini

2004-01-01T23:59:59.000Z

96

High-Throughput Screening Techniques  

NLE Websites -- All DOE Office Websites (Extended Search)

Throughput Throughput Screening Techniques for Biomass Conversion Stephen R. Decker & Roman Brunecky & Melvin P. Tucker & Michael E. Himmel & Michael J. Selig Published online: 14 October 2009 # US Government 2009 Abstract High-throughput (HTP) screening of biomass or biomass-degrading enzymes, regardless of the desired outcome, is fraught with obstacles and challenges not typically faced in more traditional biotechnology. The enzyme systems are complex and synergistic and the substrate is highly heterogeneous, insoluble, and difficult to dispense. Digestions are often carried out for days at temperatures of 50°C or higher, leading to significant challenges regarding evaporation control in small well volumes. Furthermore, it is often desirable to condition or "pretreat" the biomass at extreme temperatures and/or pH to enhance enzyme digestibility.

97

Hyperspectral Remote Sensing Techniques For Locating Geothermal Resources |  

Open Energy Info (EERE)

Hyperspectral Remote Sensing Techniques For Locating Geothermal Resources Hyperspectral Remote Sensing Techniques For Locating Geothermal Resources Jump to: navigation, search OpenEI Reference LibraryAdd to library Poster: Hyperspectral Remote Sensing Techniques For Locating Geothermal Resources Abstract Demonstrating the effectiveness of hyperspectral sensors to explore for geothermal resources will be critical to our nation's energy security plans. Discovering new geothermal resources will contribute to established renewable energy capacity and lower our dependence upon fuels that contribute to green house gas emissions. The use of hyperspectral data and derived imagery products is currently helping exploration managers gain greater efficiencies and drilling success. However, more work is needed as geologists continue to learn about hyperspectral imaging and, conversely,

98

A technique for creating new visual phenomena  

E-Print Network (OSTI)

This paper outlines a technique for creating new visual phenomena by proposing a systematic method of using existing media in novel manners. The technique involve s the random and purposeful manipulation of person-media ...

Ritter, Donald

1988-01-01T23:59:59.000Z

99

Lab Analysis Techniques | Open Energy Information  

Open Energy Info (EERE)

form form View source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit with form History Facebook icon Twitter icon » Lab Analysis Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Lab Analysis Techniques Details Activities (0) Areas (0) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Lab Analysis Techniques Exploration Sub Group: None Parent Exploration Technique: Exploration Techniques Information Provided by Technique Lithology: Water rock interaction; Rapid and unambiguous identification of unknown minerals; Bulk and trace element analysis of rocks, minerals, and sediments; Obtain detailed information about rock composition and morphology; Determine detailed information about rock composition and morphology; Cuttings are used to define lithology; Core analysis is done to define lithology

100

The Synthetic Dual-Doppler Analysis Technique  

Science Conference Proceedings (OSTI)

Synthetic dual-Doppler (SDD) is a single-Doppler analysis technique that combines measurements from two different times, provided the viewing angle changes significantly. In this study, the viability of the SDD technique is investigated through ...

Brian A. Klimowski; John D. Marwitz

1992-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "techniques drilling techniques" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Category:Geochemical Techniques | Open Energy Information  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Category Edit History Facebook icon Twitter icon » Category:Geochemical Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Geothermalpower.jpg Looking for the Geochemical Techniques page? For detailed information on exploration techniques, click here. Category:Geochemical Techniques Add.png Add a new Geochemical Techniques Technique Subcategories This category has only the following subcategory. G [×] Geochemical Data Analysis‎ 3 pages Pages in category "Geochemical Techniques" This category contains only the following page. G Geochemical Data Analysis Retrieved from "http://en.openei.org/w/index.php?title=Category:Geochemical_Techniques&oldid=689823"

102

Airborne electromagnetic surveys as a reconnaissance technique...  

Open Energy Info (EERE)

electromagnetic surveys as a reconnaissance technique for geothermal exploration Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: Airborne...

103

Topics and Techniques in Forensic DNA Analysis  

Science Conference Proceedings (OSTI)

... Topics and Techniques for Forensic DNA Analysis NYC OCME Dept of Forensic Biology ... NIST Human Identity Project Leader (1999-present) ...

2012-04-17T23:59:59.000Z

104

Microscopy Technique Could Help Computer Industry ...  

Science Conference Proceedings (OSTI)

Microscopy Technique Could Help Computer Industry Develop 3-D Components. From NIST Tech Beat: June 25, 2013. ...

2013-06-25T23:59:59.000Z

105

Category:Downhole Techniques | Open Energy Information  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Category Edit History Facebook icon Twitter icon » Category:Downhole Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Geothermalpower.jpg Looking for the Downhole Techniques page? For detailed information on Downhole Techniques as exploration techniques, click here. Category:Downhole Techniques Add.png Add a new Downhole Techniques Technique Subcategories This category has the following 5 subcategories, out of 5 total. B [×] Borehole Seismic Techniques‎ 2 pages F [×] Formation Testing Techniques‎ O [×] Open-Hole Techniques‎ W [×] Well Log Techniques‎ 17 pages [×] Well Testing Techniques‎ 8 pages

106

Property:ExplorationTechnique | Open Energy Information  

Open Energy Info (EERE)

ExplorationTechnique ExplorationTechnique Jump to: navigation, search Property Name ExplorationTechnique Property Type Page Description The ExplorationTechnique used in the Exploration Activity. Use the form ExplorationTechnique to create new exploration technique pages. Subproperties This property has the following 1 subproperty: A Aeromagnetic Survey At Crump's Hot Springs Area (DOE GTP) Pages using the property "ExplorationTechnique" Showing 25 pages using this property. (previous 25) (next 25) 2 2-M Probe At Alum Area (Kratt, Et Al., 2010) + 2-M Probe Survey + 2-M Probe At Astor Pass Area (Kratt, Et Al., 2010) + 2-M Probe Survey + 2-M Probe At Black Warrior Area (DOE GTP) + 2-M Probe Survey + 2-M Probe At Columbus Salt Marsh Area (Kratt, Et Al., 2010) + 2-M Probe Survey +

107

Well Log Techniques At Raft River Geothermal Area (1977) | Open Energy  

Open Energy Info (EERE)

Well Log Techniques At Raft River Geothermal Area Well Log Techniques At Raft River Geothermal Area (1977) Exploration Activity Details Location Raft River Geothermal Area Exploration Technique Well Log Techniques Activity Date 1977 Usefulness not indicated DOE-funding Unknown Exploration Basis Characterize the rock using well log data. Notes Information is given on the following logs: dual-induction focused log, including resistivity, sp, and conductivity; acoustic log; compensated neutron; compensated densilog; and caliper. Lithologic breaks for a drill core to a depth of 2840 ft are illustrated. References Covington, H.R. (1 January 1978) Deep drilling data, Raft River geothermal area, Idaho Raft River geothermal exploration well No. 4 Retrieved from "http://en.openei.org/w/index.php?title=Well_Log_Techniques_At_Raft_River_Geothermal_Area_(1977)&oldid=6004

108

Fundamentals and Techniques of Nonimaging  

DOE Green Energy (OSTI)

This is the final report describing a long term basic research program in nonimaging optics that has led to major advances in important areas, including solar energy, fiber optics, illumination techniques, light detectors, and a great many other applications. The term ''nonimaging optics'' refers to the optics of extended sources in systems for which image forming is not important, but effective and efficient collection, concentration, transport, and distribution of light energy is. Although some of the most widely known developments of the early concepts have been in the field of solar energy, a broad variety of other uses have emerged. Most important, under the auspices of this program in fundamental research in nonimaging optics established at the University of Chicago with support from the Office of Basic Energy Sciences at the Department of Energy, the field has become very dynamic, with new ideas and concepts continuing to develop, while applications of the early concepts continue to be pursued. While the subject began as part of classical geometrical optics, it has been extended subsequently to the wave optics domain. Particularly relevant to potential new research directions are recent developments in the formalism of statistical and wave optics, which may be important in understanding energy transport on the nanoscale. Nonimaging optics permits the design of optical systems that achieve the maximum possible concentration allowed by physical conservation laws. The earliest designs were constructed by optimizing the collection of the extreme rays from a source to the desired target: the so-called ''edge-ray'' principle. Later, new concentrator types were generated by placing reflectors along the flow lines of the ''vector flux'' emanating from lambertian emitters in various geometries. A few years ago, a new development occurred with the discovery that making the design edge-ray a functional of some other system parameter permits the construction of whole new classes of devices with greatly expanded capabilities compared to conventional approaches. These ''tailored edge-ray'' designs have dramatically broadened the range of geometries in which nonimaging optics can provide a significant performance improvement. Considerable progress continues to be made in furthering the incorporation of nonimaging secondaries into practical high concentration and ultra-high concentration solar collector systems. In parallel with the continuing development of nonimaging geometrical optics, our group has been working to develop an understanding of certain fundamental physical optics concepts in the same context. In particular, our study of the behavior of classical radiance in nonimaging systems, has revealed some fundamentally important new understandings that we have pursued both theoretically and experimentally. The field is still relatively new and is rapidly gaining widespread recognition because it fuels many industrial applications. Because of this, during the final years of the project, our group at Chicago has been working more closely with a team of industrial scientists from Science Applications International Corporation (SAIC) at first informally, and later more formally, beginning in 1998, under a formal program initiated by the Department of Energy and incrementally funded through this existing grant. This collaboration has been very fruitful and has led to new conceptual breakthroughs which have provided the foundation for further exciting growth. Many of these concepts are described in some detail in the report.

O'Gallagher, J. J.; Winston, R.

2003-07-10T23:59:59.000Z

109

Plant monitoring techniques and second generation designs  

SciTech Connect

Chemical and instrumental monitoring techniques suitable for geothermal use are described in a manner to relate them to plant operational problems and downtime avoidance. The use of these techniques permits the detection of scaling, the onset of scaling, corrosion loss, current corrosion rates and incipient heat exchanger failure. Conceptual advances are noted which simplify the research techniques to approaches that should be usable even in some low-capital well-head type power plants. 10 refs., 8 figs.

Kindle, C.H.; Shannon, D.W.; Robertus, R.J.; Pierce, D.D.; Sullivan, R.G.

1985-03-01T23:59:59.000Z

110

REVIEW OF AIR FLOW MEASUREMENT TECHNIQUES  

Office of Scientific and Technical Information (OSTI)

9747 9747 Review of Airflow Measurement Techniques Jennifer McWilliams Energy Performance of Buildings Group Environmental Energy Technologies Division Lawrence Berkeley National Laboratory Berkeley, CA 94720 December 1, 2002 Abstract Airflow measurement techniques are necessary to determine the most basic of indoor air quality questions: "Is there enough fresh air to provide a healthy environment for the occupants of the building?" This paper outlines airflow measurement techniques, but it does not make recommendations for techniques that should be used. The airflows that will be discussed are those within a room or zone, those between rooms or zones, such as through doorways (open or closed) or passive vents, those between the building and

111

Definition: Electromagnetic Profiling Techniques | Open Energy Information  

Open Energy Info (EERE)

Electromagnetic Profiling Techniques Electromagnetic Profiling Techniques Jump to: navigation, search Dictionary.png Electromagnetic Profiling Techniques Electromagnetic profiling techniques map lateral variations in subsurface resistivity.[1] View on Wikipedia Wikipedia Definition Exploration geophysics is the applied branch of geophysics which uses surface methods to measure the physical properties of the subsurface Earth, along with the anomalies in these properties, in order to detect or infer the presence and position of ore minerals, hydrocarbons, geothermal reservoirs, groundwater reservoirs, and other geological structures. Exploration geophysics is the practical application of physical methods (such as seismic, gravitational, magnetic, electrical and electromagnetic) to measure the physical properties of rocks, and in particular, to detect

112

A Double Smoothing Technique for Constrained Convex ...  

E-Print Network (OSTI)

In this paper, we propose an efficient approach for solving a class of convex opti- ... accelerate our scheme, we introduce a novel double smoothing technique ...

113

Explo 2007 Blasting: Techniques & Technology Proceedings - TMS  

Science Conference Proceedings (OSTI)

Oct 22, 2008 ... This is an explosive review. Or to be more precise this review is about the Blasting: Techniques & Technology Explo 2007 Conference.

114

Eddy current technique for predicting burst pressure  

DOE Patents (OSTI)

A signal processing technique which correlates eddy current inspection data from a tube having a critical tubing defect with a range of predicted burst pressures for the tube is provided. The method can directly correlate the raw eddy current inspection data representing the critical tubing defect with the range of burst pressures using a regression technique, preferably an artificial neural network. Alternatively, the technique deconvolves the raw eddy current inspection data into a set of undistorted signals, each of which represents a separate defect of the tube. The undistorted defect signal which represents the critical tubing defect is related to a range of burst pressures utilizing a regression technique.

Petri, Mark C. (Yorkville, IL); Kupperman, David S. (Oak Park, IL); Morman, James A. (Woodridge, IL); Reifman, Jaques (Western Springs, IL); Wei, Thomas Y. C. (Downers Grove, IL)

2003-01-01T23:59:59.000Z

115

Category:Magnetic Techniques | Open Energy Information  

Open Energy Info (EERE)

Category Edit History Facebook icon Twitter icon Category:Magnetic Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Geothermalpower.jpg Looking for the...

116

NSLS Industrial User Program | Synchrotron Techniques  

NLE Websites -- All DOE Office Websites (Extended Search)

NSLS Industrial Users' Program Industry Home | Synchrotron Techniques | Battery Lab | Science Highlights | Industrial Program Coordinator | Publications Battery Lab NSLS users are...

117

Communication Techniques, Practices and Strategies of Generation ...  

Science Conference Proceedings (OSTI)

Communication Techniques, Practices and Strategies of Generation žWeb n+1č .... prevalence, distribution and (closed) format; d) the argument that a printed ...

118

Definition: Passive Seismic Techniques | Open Energy Information  

Open Energy Info (EERE)

techniques utilize vibrations from natural earthquakes or rupture processes (due to hydraulic stimulation) as a source for structural imaging of the subsurface.1 References ...

119

Teasing out technique : animating Boston's City Hall  

E-Print Network (OSTI)

What were once considered advanced visualization techniques have now become commonplace. With the advancement of visualization tools, animation has quickly become a primary means of representation within architecture; ...

Woods, Ann C., M. Arch. Massachusetts Institute of Technology

2012-01-01T23:59:59.000Z

120

Computer vision techniques for underwater navigation  

E-Print Network (OSTI)

DCS) Chapter 2 Computer Vision . . 2.1 Labeling . . . . 2.2OF CALIFORNIA, SAN DIEGO Computer Vision Techniques fordegree Master of Science in Computer Science by Christopher

Barngrover, Christopher M.

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "techniques drilling techniques" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Query expansion techniques for question answering.  

E-Print Network (OSTI)

??Query expansion is a technique used to boost performance of a document retrieval engine, such as those commonly found in question answering (QA) systems. Common… (more)

Bilotti, Matthew W. (Matthew William), 1981-

2004-01-01T23:59:59.000Z

122

Experimental Techniques for Measuring Temperature and Velocity...  

NLE Websites -- All DOE Office Websites (Extended Search)

Measuring Temperature and Velocity Fields to Improve the Use and Validation of Building Heat Transfer Models Title Experimental Techniques for Measuring Temperature and Velocity...

123

Propane earth materials drying techniques and technologies.  

E-Print Network (OSTI)

??A feasibility study for the use of propane as a subbase drying technique. Michael Blahut (1) Dr. Vernon Schaefer (2) Dr. Chris Williams (3) The… (more)

Blahut, Michael Edward

2010-01-01T23:59:59.000Z

124

Computer vision techniques for underwater navigation  

E-Print Network (OSTI)

Vision Techniques for Underwater Navigation A thesisand J. Amat. Positioning an underwater vehicle through imageand S. Feder. Autonomous Underwater Vehicle Navigation. MIT

Barngrover, Christopher M.

2010-01-01T23:59:59.000Z

125

Basement Insulation Techniques | Building Energy Codes Program  

NLE Websites -- All DOE Office Websites (Extended Search)

Basement Insulation Techniques Residential basement insulation levels should be selected in accordance with the International Energy Conservation Code, or the local energy code. Be...

126

Definition: Electromagnetic Sounding Techniques | Open Energy...  

Open Energy Info (EERE)

Sounding Techniques Electromagnetic soundings aim to map the distribution of electrical resistivity as a function of depth.1 References http:www.amazon.com...

127

Review of air flow measurement techniques  

E-Print Network (OSTI)

chamber, passive sampling, passive solar house, measurementhouse, we planed the distribution of fresh air, passivepassive perfluorocarbon tracer technique for determining air infiltration rates into houses

McWilliams, Jennifer

2002-01-01T23:59:59.000Z

128

Power reduction techniques for microprocessor systems  

Science Conference Proceedings (OSTI)

Power consumption is a major factor that limits the performance of computers. We survey the “state of the art” in techniques that reduce the total power consumed by a microprocessor system over time. These techniques are applied at various ... Keywords: Energy dissipation, power reduction

Vasanth Venkatachalam; Michael Franz

2005-09-01T23:59:59.000Z

129

Waterflood surveillance techniques; A reservoir management approach  

SciTech Connect

The reservoir management aspects of waterflooding span the time before the start of waterflood to the time when the secondary recovery either is uneconomic or is changed to an enhanced recovery. This paper reviews waterflood techniques and reports on surveillance techniques in the management of waterflooding of oil wells.

Thakur, G.C. (Chevron USA Inc. (US))

1991-10-01T23:59:59.000Z

130

Definition: Lab Analysis Techniques | Open Energy Information  

Open Energy Info (EERE)

Definition Definition Edit with form History Facebook icon Twitter icon » Definition: Lab Analysis Techniques Jump to: navigation, search Dictionary.png Lab Analysis Techniques Lab Analysis Techniques encompass a broad array of analytical methods that can be used to characterize the chemical and physical properties of rock and fluid samples. The reliability of laboratory analyses depends strongly on both adherence to standard sampling procedures in the field when collecting materials for examination and on the application of appropriate sample preparation techniques in the lab. Ret Like Like You like this.Sign Up to see what your friends like. rieved from "http://en.openei.org/w/index.php?title=Definition:Lab_Analysis_Techniques&oldid=688298" Category:

131

Live pathogens: rapid detection technique developed  

NLE Websites -- All DOE Office Websites (Extended Search)

January » January » Live Pathogens: Rapid Detection Technique Developed Live pathogens: rapid detection technique developed The technique relies on bacteria being critically dependent upon the key nutrient iron. January 24, 2013 Colorized scanning electron micrograph of E. coli. Colorized scanning electron micrograph of E. coli. Photo credit: US Centers for Disease Control and Prevention LANL's new method eliminates the need for laboratory culture and greatly speeds the process. Los Alamos researchers have developed a better technique for quick detection of live pathogens in the field. Identification of viable bacteria in a complex environment is scientifically challenging. Current detection and diagnostic techniques are inadequate in major public health emergencies, such as outbreaks of food-borne illness. Detection of live

132

Tailoring couple therapy techniques to client needs  

E-Print Network (OSTI)

Research illuminating which therapist techniques are used in care-as-usual couple therapy, and under what circumstances, can contribute to a fuller understanding of how therapy works. The overall goal of the present study was to better understand care-as-usual couple therapy by investigating session-by-session techniques and session content to determine how therapists modify them based on the timing of the session and couples? pre-treatment characteristics. A total of 123 heterosexual couples were examined. Therapists frequently used acceptance techniques and discussion of recent or ongoing conflict or problem. Therapists typically used the same levels of techniques and session contents over a course of therapy. In addition, there were relatively few predictors of change in therapy techniques and session content.

Hsueh, Annie C.

2008-12-01T23:59:59.000Z

133

Wire Making Techniques - HTS Coated Conductors - Fact Sheet ...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Wire Making Techniques - HTS Coated Conductors - Fact Sheet Wire Making Techniques - HTS Coated Conductors - Fact Sheet Wire Making Techniques - HTS Coated Conductors - Fact Sheet...

134

Definition: Ground Electromagnetic Techniques | Open Energy Information  

Open Energy Info (EERE)

Definition Definition Edit with form History Facebook icon Twitter icon » Definition: Ground Electromagnetic Techniques Jump to: navigation, search Dictionary.png Ground Electromagnetic Techniques Ground electromagnetic techniques measure electromagnetic fields in order to determine subsurface electrical resistivity with the earth surface as the observation point.[1] View on Wikipedia Wikipedia Definition The electromagnetic force is one of the four fundamental interactions in nature, the other three being the strong interaction, the weak interaction, and gravitation. This force is described by electromagnetic fields, and has innumerable physical instances including the interaction of electrically charged particles and the interaction of uncharged magnetic force fields with electrical conductors. The word

135

Risk assessment technique for evaluating research laboratories  

SciTech Connect

A technique has been developed to evaluate research laboratories according to risk, where risk is defined as the product of frequency and consequence. This technique was used to evaluate several laboratories at the Idaho National Engineering Laboratory under the direction of the Department of Energy, Idaho Field Office to assist in the risk management of the Science and Technology Department laboratories. With this technique, laboratories can be compared according to risk, and management can use the results to make cost effective decisions associated with the operation of the facility.

Bolander, T.W.; Meale, B.M.; Eide, S.A.

1992-01-01T23:59:59.000Z

136

Risk assessment technique for evaluating research laboratories  

SciTech Connect

A technique has been developed to evaluate research laboratories according to risk, where risk is defined as the product of frequency and consequence. This technique was used to evaluate several laboratories at the Idaho National Engineering Laboratory under the direction of the Department of Energy, Idaho Field Office to assist in the risk management of the Science and Technology Department laboratories. With this technique, laboratories can be compared according to risk, and management can use the results to make cost effective decisions associated with the operation of the facility.

Bolander, T.W.; Meale, B.M.; Eide, S.A.

1992-09-01T23:59:59.000Z

137

Wafer-scale charge isolation technique  

DOE Patents (OSTI)

An apparatus and method are described which improve the performance of charge-coupled devices (CCD) in the presence of ionizing radiation. The invention is a wafer scale charge isolation technique which inhibits or reduces the flow of electrons created by the passage of ionizing radiation in the bulk regions of a silicon CCD. The technique has been tested in a device designed for operating in the infra-red wavelength band. The technique prevents charge from reaching the active charge collection volume of a pixel in a CCD.

Colella, N.J.; Kimbrough, J.R.

1994-12-31T23:59:59.000Z

138

Superhydrophobic Materials Technology-PVC Bonding Techniques  

SciTech Connect

The purpose of the technology maturation project was to develop an enhanced application technique for applying diatomaceous earth with pinned polysiloxane oil to PVC pipes and materials. The oil infiltration technique is applied as a spray of diluted oil in a solvent onto the superhydrophobic diatomaceous earth substrate. This makes the surface take on the following characteristics: • wet?cleanable • anti?biofouling • waterproof • anti?corrosion. The project involved obtaining input and supplies from VeloxFlow and the development of successful techniques that would quickly result in a commercial license agreement with VeloxFlow and other companies that use PVC materials in a variety of other fields of use.

Hunter, Scott R. [Oak Ridge National Laboratory; Efird, Marty [VeloxFlow, LLC

2013-05-03T23:59:59.000Z

139

NSLS Industrial User Program | Synchrotron Techniques  

NLE Websites -- All DOE Office Websites (Extended Search)

Synchrotron X-ray Techniques for Industrial Research Synchrotron X-ray Techniques for Industrial Research Techniques http://www.sc.doe.gov/bes/synchrotron_techniques/ Spectroscopy Spectroscopy is used to study the energies of particles emitted or absorbed by samples that are exposed to beam to determine the characteristics of chemical bonding and electron energy band structure. Extended X-Ray Absorption Fine Structure Spectroscopy (EXAFS) X-Ray Absorption Near Edge Spectroscopy (XANES) Hard X-ray Photoelectron Spectroscopy (HAXPES) Scanning X-Ray Microscopy: Micro-XRF, -XAFS, -XRD Soft X-Ray Absorption and Scattering Infrared Vibrational Microspectroscopy Photoemission Electron Microscopy / Low-Energy Electron Microscopy (PEEM/LEEM) Scattering/Diffraction Scattering/diffraction makes use of the patterns of scattered x-rays when

140

Quality technique transfer: Manufacturing and software  

Science Conference Proceedings (OSTI)

An argument for quality technique transfer between manufacturing and software is put forward in which it is recognised that the nature of the production process differs and that the emphasis accorded given stages in the respective life cycles ...

Graham A. King

2000-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "techniques drilling techniques" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Definition: Active Seismic Techniques | Open Energy Information  

Open Energy Info (EERE)

Seismic Techniques Seismic Techniques Jump to: navigation, search Dictionary.png Active Seismic Techniques Active seismic techniques study the behavior of artificially-generated elastic waves in the subsurface. A seismic wave or pulse is generated at the surface by an active seismic source which can be a vibration, mechanical impact, or near-surface explosion.[1] View on Wikipedia Wikipedia Definition Seismic waves are waves of energy that travel through the Earth's layers, and are a result of an earthquake, explosion, or a volcano that imparts low-frequency acoustic energy. Many other natural and anthropogenic sources create low amplitude waves commonly referred to as ambient vibrations. Seismic waves are studied by geophysicists called seismologists. Seismic wave fields are recorded by a seismometer,

142

Definition: Downhole Techniques | Open Energy Information  

Open Energy Info (EERE)

Downhole Techniques Downhole Techniques Jump to: navigation, search Dictionary.png Downhole Techniques Downhole techniques are measurements collected from a borehole environment which provide information regarding the character of formations and fluids intersected by a well. These petrophysical data are fundamental to developing the understanding of a geothermal reservoir.[1] View on Wikipedia Wikipedia Definition Petrophysics (from the Greek πέτρα, petra, "rock" and φύσÎčς, physis, "nature") is the study of physical and chemical rock properties and their interactions with fluids. A major application of petrophysics is in studying reservoirs for the hydrocarbon industry. Petrophysicists are employed to help reservoir engineers and geoscientists understand the rock properties of the reservoir, particularly how pores in

143

Continuous flow separation techniques for microchemical synthesis  

E-Print Network (OSTI)

Performing multistep microchemical synthesis requires many techniques from combining micromixers in series to the development of continuous microfluidic separation tools. Safety, high heat and mass transfer rates, and cost ...

Kralj, Jason G

2006-01-01T23:59:59.000Z

144

A Unified Analysis-Initialization Technique  

Science Conference Proceedings (OSTI)

A unified analysis-initialization technique is introduced and tested in the framework of the shallow water equations. It consists of iterating multivariate optimal interpolation and nonlinear normal mode initialization. For extratropical regions, ...

David L. Williamson; Roger Daley

1983-08-01T23:59:59.000Z

145

Advanced illumination techniques for GPU volume raycasting  

Science Conference Proceedings (OSTI)

Volume raycasting techniques are important for both visual arts and visualization. They allow an efficient generation of visual effects and the visualization of scientific data obtained by tomography or numerical simulation. Thanks to their flexibility, ...

Markus Hadwiger; Patric Ljung; Christof Rezk Salama; Timo Ropinski

2008-12-01T23:59:59.000Z

146

Lower bound techniques for data structures  

E-Print Network (OSTI)

We describe new techniques for proving lower bounds on data-structure problems, with the following broad consequences: * the first [omega](lg n) lower bound for any dynamic problem, improving on a bound that had been ...

P?tra?cu, Mihai

2008-01-01T23:59:59.000Z

147

Hardware Fault Insertion Techniques and Tools  

E-Print Network (OSTI)

The concept of dependability validation becomes more and more important regarding big public telecom systems. This is why fault insertion has been widely accepted as a means of testing the fault handling mechanisms of the systems. This master thesis classifies and compares fault insertion techniques used within the industry. It also looks into internal fault insertion techniques used by the people at Ericsson Telecom working with the AXD301 ATM switch. Hardware Fault Insertion Techniques and Tools 2 Acknowledgements The following people at Ericsson has contributed to this thesis in one way or another: Roger Nordmark Mattias Rimbark Bengt Kvist Anders strm Kenny Ohlsson Johan Jeppson Johan Eklv Also a thank you to my supervisor at KTH: Axel Jantsch A special thanks also to my good friend and colleague: Robert Thorhuus Hardware Fault Insertion Techniques and Tools 3 Abbreviations ASIC - Application Specific Integrated Circuit ATM - Asynchronous Transfer Mode BSDL - Boundary Scan De...

Emil Savqvist; Roger Nordmark; Mattias Rimbark; Bengt Kvist; Anders Ćström; Kenny Ohlsson; Johan Eklöv; Axel Jantsch; Robert Thorhuus; Hw Hard Ware

2000-01-01T23:59:59.000Z

148

Definition: Gravity Techniques | Open Energy Information  

Open Energy Info (EERE)

0521576326 Ret LikeLike UnlikeLike You like this.Sign Up to see what your friends like. rieved from "http:en.openei.orgwindex.php?titleDefinition:GravityTechniques&oldid598...

149

A Survey of Radar Rain Measurement Techniques  

Science Conference Proceedings (OSTI)

Several methods used to estimate rainfall rate R are surveyed. The distribution N(D) of drop sizes is of central importance in determining the reflectivity factor Z, attenuation rate K, and R. With single-parameter measurement techniques either ...

Richard J. Doviak

1983-05-01T23:59:59.000Z

150

A guide to programming tools and techniques  

Science Conference Proceedings (OSTI)

Current programming tools and techniques facilitating program development and maintenance under Operating System/360 and/370 are collected and discussed. These aids are categorized and defined according to their function. Abstracts of some of the available ...

J. W. Pomeroy

1972-09-01T23:59:59.000Z

151

Advanced Characterization Techniques for Quantifying and ...  

Science Conference Proceedings (OSTI)

TMS Materials Processing and Manufacturing Division ... (3) All advanced electron-based techniques including HR-TEM, EBSD, HR-EBSD, PED, and ... Micromechanical Deformation Behaviour of Hydride-containing Micropillars in Zircaloy-4.

152

Two Improvements in Omega Windfinding Techniques  

Science Conference Proceedings (OSTI)

A one-dimensional local spline smoothing technique is applied to Omega navigational signals for the purpose of windfinding. Wind profiles so produced depend largely on two parameters of the smoothing procedure: the nodal spacing, which determines ...

James L. Franklin; Katsuyuki V. Ooyama; Stephen J. Lord

1987-03-01T23:59:59.000Z

153

Meteorological Tracer Techniques for Parameterizing Atmospheric Dispersion  

Science Conference Proceedings (OSTI)

Although tracer materials have been used in atmospheric dispersion studies for decades, basic information about meteorological tracer techniques is scattered among a number of different sources. This paper attempts to pull together this ...

Warren B. Johnson

1983-05-01T23:59:59.000Z

154

Nondestructive Performance Characterization Techniques for Module Reliability  

DOE Green Energy (OSTI)

This paper describes nondestructive characterization techniques for module reliability. These techniques include light and dark current versus voltage and related analysis such as resistance, diode quality factor, and dark current. The use of the NREL laser scanner at zero volts and forward bias is also described as a technique to uncover cracks, shunts, and open-circuit regions in a module. Quantum-efficiency measurements of isolated cells or regions in a module are also possible. The interpretation of laser-scanning data is enhanced by hot-spot testing with an infrared camera or thermographic paper. Specialized nondestructive techniques have also been developed to determine the shunt resistance of individual cells in a module by selective shading of cells under sunlight. Ultraviolet fluorescence and reflectivity measurements at NREL have proven useful in evaluating encapsulant stability.

Emery, K.

2003-05-01T23:59:59.000Z

155

Query expansion techniques for question answering  

E-Print Network (OSTI)

Query expansion is a technique used to boost performance of a document retrieval engine, such as those commonly found in question answering (QA) systems. Common methods of query expansion for Boolean keyword-based document ...

Bilotti, Matthew W. (Matthew William), 1981-

2004-01-01T23:59:59.000Z

156

A Parameterization Technique for Nonlinear Spectral Models  

Science Conference Proceedings (OSTI)

The feasibility of developing an objective parameterization technique is examined for general nonlinear hydrodynamical systems. The typical structure of these hydrodynamical systems, regardless of their complexity, is one in which the rates of ...

Ronald Gelaro; Hampton N. Shirer

1986-04-01T23:59:59.000Z

157

Insider Power Techniques for Microsoft Windows XP  

Science Conference Proceedings (OSTI)

Tweak Windowsź XP for ultimate performance with the undocumented secrets and hidden gems of the experts who work with the technology every day. Use their best techniques, practices, hacks, tricks, and workarounds to put all of your PC's muscle to ...

Paul Mcfedries; Austin Wilson; Geoff Winslow

2003-02-01T23:59:59.000Z

158

Techniques for enhanced physical-layer security  

E-Print Network (OSTI)

Information-theoretic security--widely accepted as the strictest notion of security--relies on channel coding techniques that exploit the inherent randomness of propagation channels to strengthen the security of communications ...

Pinto, Pedro C.

159

A Technique for Autocalibration of Cloud Lidar  

Science Conference Proceedings (OSTI)

In this paper a technique for autocalibration of a cloud lidar is demonstrated. It is shown that the lidar extinction-to-backscatter ratio derived from integrated backscatter for stratocumulus is, in the absence of drizzle, constrained to a ...

Ewan J. O'Connor; Anthony J. Illingworth; Robin J. Hogan

2004-05-01T23:59:59.000Z

160

Fingerprint Image Postprocessing Using Windowing Technique  

Science Conference Proceedings (OSTI)

Performance of Automatic Fingerprint Identification System (AFIS) is greatly affected by its matching rate, means it should have low False Acceptance Rate (FAR) and False Rejection Rate (FRR). Minutiae based fingerprint matching techniques are normally ...

Anam Tariq; M. Usman Akram; Sarwat Nasir; Rabia Arshad

2008-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "techniques drilling techniques" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Lidar techniques for search and rescue  

SciTech Connect

Four techniques for using LIDAR in Search and Rescue Operations will be discussed. The topic will include laser retroreflection, laser-induced fluorescence in the visible, laser-induced fluorescence during daylight hours, and laser-induced fluorescence in the uv. These techniques use high-repetition rate lasers at a variety of frequencies to induce either fluorescence in dye markers or retroreflection from plastic corner cubes on life preservers and other emergency markers.

Cabral, W.L.

1985-01-01T23:59:59.000Z

162

Cascade Training Technique for Particle Identification  

E-Print Network (OSTI)

The cascade training technique which was developed during our work on the MiniBooNE particle identification has been found to be a very efficient way to improve the selection performance, especially when very low background contamination levels are desired. The detailed description of this technique is presented here based on the MiniBooNE detector Monte Carlo simulations, using both artifical neural networks and boosted decision trees as examples.

Yong Liu; Ion Stancu

2006-11-27T23:59:59.000Z

163

Refinery analytical techniques optimize unit performance  

Science Conference Proceedings (OSTI)

Refinery process engineers need to consider benefits of laboratory analytical techniques when evaluating unit performance. Refinery heavy-oil laboratory analytical techniques use both old and new technologies. Knowing how to use available laboratory analytical techniques within their limitations are critical to obtain correct refinery optimization decisions. Better refinery stream distillation and contaminant data ultimately improves the accuracy of various refinery decision-making tools. These laboratory analytical techniques are covered: high-temperature simulated distillation (HTSD); true boiling point (TBP) distillation--ASTM D2892; vacuum distillation--ASTM D5236; continuous-flash vaporizers; wiped-film evaporators; inductively coupled plasma atomic-emission spectroscopy (ICP-AES); Conradson--ASTM D189/Microcarbon residue--ASTM D4530; and asphaltene IP-143, ASTM D3279, ASTM D4124. Analysis of atmospheric crude, vacuum crude and delayed coker units highlight these laboratory techniques to identify potential yield and product quality benefits. Physical distillation or wiped-film evaporation in conjunction with HTSD, ICP-AES, microcarbon residue and asphaltened data will better characterize a feedstock as well as determine the source of contaminants. Economics are refinery specific, therefore, these examples focus on applying laboratory techniques as opposed to discussing specifics of unit improvement. These are discussed qualitatively.

Golden, S.W. [Process Consulting Services Inc., Grapevine, TX (United States); Craft, S. [Chempro, Inc., LaPorte, TX (United States); Villalanti, D.C. [Triton Analytics Corp., Houston, TX (United States)

1995-11-01T23:59:59.000Z

164

Proceedings of the eighteenth annual conference on explosives and blasting technique  

Science Conference Proceedings (OSTI)

This edition of the Proceedings of the Annual Conference on Explosives and Blasting Techniques is the eighteenth in a series published by the International Society of Explosives Engineers. The papers cover a wide variety of explosives and blasting techniques, including: rock mechanics, rock drilling, perimeter control, handling and documenting blasting complaints, blast vibration frequencies, blasting techniques for surface and underground coal mines, explosives for permafrost blasting, lightning detection, use of slow motion video to analyze blasts, tunneling, and close-in blasting control. Papers have been processed individually for inclusion on the data base.

Not Available

1993-01-01T23:59:59.000Z

165

Magnetic induction technique for mapping vertical conductive fractures: theory of operation  

DOE Green Energy (OSTI)

Utilization of a hot dry rock geothermal resource requires circulation of a fluid (water) through fractures in the rock. The Los Alamos Scientific Laboratory is presently investigating the feasibility and economics of tapping this energy resource. Presently, the fractures in the rock are created by conventional hydraulic fracturing techniques. Accurate determination of the geometry of the fracture system is required so that boreholes may be drilled to complete the circulation system. The theory of a technique designed to map vertical conductive fractures located in resistive rock is presented. The technique is based on magnetic induction. Fracture thickness and strike can be determined from measurements made in a single borehole.

Not Available

1978-07-01T23:59:59.000Z

166

Frac packs: A specialty option or primary completion technique?  

SciTech Connect

High permeability fracture treatments have taken place at Alaska`s North Slope, in the North Sea, and most recently, in the unconsolidated Miocene formations of the Gulf of Mexico -- where gravel pack completions have historically been used to prevent sand production. In the Gulf of Mexico, attempts were made as early as the mid-1960s to hydraulically fracture sands. However, some of these early treatments failed because of improper techniques, poor candidate selection and lack of understanding of rock property mechanics. Recent developments in fracturing technology, and the use of this technology to fracture through damage has achieved more favorable results than gravel packing and sandstone acidizing, and has led to widespread use of these fracture treatments. The procedure for fracturing high permeability formations is called frac packing. These frac pack treatments are typically used to remove near-wellbore damage that occurs from drilling and completion operations.

NONE

1997-03-01T23:59:59.000Z

167

Evaluation of the mercury soil mapping geothermal exploration techniques  

Science Conference Proceedings (OSTI)

In order to evaluate the suitability of the soil mercury geochemical survey as a geothermal exploration technique, soil concentrations of mercury are compared to the distribution of measured geothermal gradients at Dixie Valley, Nevada; Roosevelt Hot Springs, Utah; and Noya, Japan. Zones containing high-mercury values are found to closely correspond to high geothermal gradient zones in all three areas. Moreover, the highest mercury values within the anomalies are found near the wells with the highest geothermal gradient. Such close correspondence between soil concentrations of mercury and high-measured geothermal gradients strongly suggests that relatively low-cost soil mercury geochemical sampling can be effective in identifying drilling targets within high-temperature areas.

Matlick, J.S.; Shiraki, M.

1981-10-01T23:59:59.000Z

168

Review of air flow measurement techniques  

SciTech Connect

Airflow measurement techniques are necessary to determine the most basic of indoor air quality questions: ''Is there enough fresh air to provide a healthy environment for the occupants of the building?'' This paper outlines airflow measurement techniques, but it does not make recommendations for techniques that should be used. The airflows that will be discussed are those within a room or zone, those between rooms or zones, such as through doorways (open or closed) or passive vents, those between the building and outdoors, and those through mechanical air distribution systems. Techniques that are highlighted include particle streak velocimetry, hot wire anemometry, fan pressurization (measuring flow at a given pressure), tracer gas, acoustic methods for leak size determination, the Delta Q test to determine duct leakage flows, and flow hood measurements. Because tracer gas techniques are widely used to measure airflow, this topic is broken down into sections as follows: decay, pulse injection, constant injection, constant concentration, passive sampling, and single and multiple gas measurements for multiple zones.

McWilliams, Jennifer

2002-12-01T23:59:59.000Z

169

Category:Electromagnetic Sounding Techniques | Open Energy Information  

Open Energy Info (EERE)

Electromagnetic Sounding Techniques Electromagnetic Sounding Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Geothermalpower.jpg Looking for the Electromagnetic Sounding Techniques page? For detailed information on Electromagnetic Sounding Techniques, click here. Category:Electromagnetic Sounding Techniques Add.png Add a new Electromagnetic Sounding Techniques Technique Subcategories This category has only the following subcategory. M [×] Magnetotelluric Techniques‎ 1 pages Pages in category "Electromagnetic Sounding Techniques" The following 2 pages are in this category, out of 2 total. M Magnetotelluric Techniques T Time-Domain Electromagnetics Retrieved from "http://en.openei.org/w/index.php?title=Category:Electromagnetic_Sounding_Techniques&oldid=689837"

170

Drilling and general petroleum engineering  

Science Conference Proceedings (OSTI)

Forty-nine papers are included in the Drilling and General Petroleum Engineering Volume of the SPE Annual Conference and Exhibition proceedings. The conference was held in New Orleans, Louisiana, September 25-28, 1994. The papers cover such topics as: extended reach well drilling, development of marginal satellite fields, slim hole drilling, pressure loss predictions, models for cuttings transport, ester-based drilling fluid systems, borehole stability, cementing, operations, bit failures, roller core bits, well tracking techniques, nitrogen drilling systems, plug failures, drill bit and drillstring dynamics, slim hole vibrations, reserve estimates, enhanced recovery methods, waste disposal, and engineering salary trends. A separate abstract and indexing was prepared for each paper for inclusion in the Energy Science and Technology Database.

Not Available

1994-01-01T23:59:59.000Z

171

Definition: Electromagnetic Techniques | Open Energy Information  

Open Energy Info (EERE)

Electromagnetic Techniques Electromagnetic Techniques The objective of electromagnetic (EM) techniques is to image the electrical resistivity structure of the subsurface through the measurement of naturally- or artificially-generated electromagnetic fields.[1] View on Wikipedia Wikipedia Definition The electromagnetic force is one of the four fundamental interactions in nature, the other three being the strong interaction, the weak interaction, and gravitation. This force is described by electromagnetic fields, and has innumerable physical instances including the interaction of electrically charged particles and the interaction of uncharged magnetic force fields with electrical conductors. The word electromagnetism is a compound form of two Greek terms, áŒąÎ»Î”ÎșÏ„ÏÎżÎœ, ēlektron, "amber", and ÎŒÎ±ÎłÎœÎźÏ„Î·Ï‚, magnētēs, "magnet". The science

172

Definition: Remote Sensing Techniques | Open Energy Information  

Open Energy Info (EERE)

Remote Sensing Techniques Remote Sensing Techniques Jump to: navigation, search Dictionary.png Remote Sensing Techniques Remote sensing utilizes satellite and/or airborne based sensors to collect information about a given object or area. Remote sensing data collection methods can be passive or active. Passive sensors (e.g., spectral imagers) detect natural radiation that is emitted or reflected by the object or area being observed. In active remote sensing (e.g., radar) energy is emitted and the resultant signal that is reflected back is measured.[1] View on Wikipedia Wikipedia Definition Remote sensing is the acquisition of information about an object or phenomenon without making physical contact with the object. In modern usage, the term generally refers to the use of aerial sensor technologies

173

Definition: Magnetic Techniques | Open Energy Information  

Open Energy Info (EERE)

Magnetic Techniques Magnetic Techniques Jump to: navigation, search Dictionary.png Magnetic Techniques The magnetic method is the study of the distribution of magnetic minerals in the upper 20-30km of the earth's crust. The magnetic method may also be used to estimate the thickness of the crust or to constrain temperatures in the crust using the Curie isotherm (the temperatures at which minerals lose their strong magnetic properties), whichever is shallower.[1] References ↑ http://www.ipgp.fr/~diament/Imageries%20Gravi-Mag/Nabighian_etal_Mag.pdf http://www.cflhd.gov/resources/agm/geoApplications/SurfaceMethods/911MagneticMethods.cfm http://onlinelibrary.wiley.com/doi/10.1029/JB087iB06p04846/abstract Ret LikeLike UnlikeLike You like this.Sign Up to see what your friends like. rieved from

174

Shock Timing Technique for the NIF  

Science Conference Proceedings (OSTI)

Among the final shots at the Nova laser was a series testing the VISAR technique that will be the primary diagnostic for timing the shocks in a NIF ignition capsule. At Nova, the VISAR technique worked over the range of shock strengths and with the precision required for the NIF shock timing job--shock velocities in liquid D{sub 2} from 12 {micro}m/ns to 65 {micro}m/ns with better than 2% accuracy. VISAR images showed stronger shocks overtaking weaker ones, which is the basis of the plan for setting the pulse shape for the NIF ignition campaign. The technique is so precise that VISAR measurements may also play a role in certifying beam-to-beam and shot-to-shot repeatability of NIF laser pulses.

Munro, D.H.; Celliers, P.M.; Collins, G.W.; Gold, D.M.; DaSilva, L.B.; Haan, S.W.; Cauble, R.C.; Hammel, B.A.; Hsing, W.W.

2000-10-03T23:59:59.000Z

175

Ion Technique for Identifying Gamma Detector Candidates  

SciTech Connect

Recent demands for radiation detector materials with better energy resolution at room temperature have prompted research efforts on both accelerated material discovery and efficient analysis techniques. Ions can easily deposit their energy in thin films or small crystals and the radiation response can be used to identify material properties relevant to detector performance. In an effort to identify gamma detector candidates using small crystals or film samples, an ion technique is developed to measure relative light yield and energy resolution of candidate materials and to evaluate radiation detection performance. Employing a unique time-of-flight (TOF) telescope, light yield and energy resolution resulting from ion excitation are investigated over a continuous energy region. The efficiency of this ion technique is demonstrated using both organic (plastic scintillator) and inorganic (CaF2:Eu, YAP:Ce, CsI:Tl and BGO) scintillators.

Zhang, Yanwen; Xiang, Xia; Rausch, Julie L.; Zu, Xiaotao T.; Weber, William J.

2009-06-15T23:59:59.000Z

176

Definition: Magnetotelluric Techniques | Open Energy Information  

Open Energy Info (EERE)

Definition Definition Edit with form History Facebook icon Twitter icon » Definition: Magnetotelluric Techniques Jump to: navigation, search Dictionary.png Magnetotelluric Techniques Magnetotellurics is an electromagnetic geophysical method used to image the electrical resistivity structure of the subsurface through the measurement of electrical and magnetic fields at the earth's surface.[1] View on Wikipedia Wikipedia Definition Magnetotellurics (MT) is an electromagnetic geophysical method of imaging the earth's subsurface by measuring natural variations of electrical and magnetic fields at the Earth's surface. Investigation depth ranges from 300m below ground by recording higher frequencies down to 10,000m or deeper with long-period soundings. Developed in Russia and

177

Tensor transformation technique for the transport equation  

SciTech Connect

A step-wise tensor transformation technique is presented for the transformation of the single energy group transport equation to an arbitrary spatial coordinate system. Both gradient and divergence forms of the equation are given and the same method is applied to the derivation of the diffusion approximation. It is demonstrated that using an orthogonal representation of the propagation vector will simplify the divergence form of the equation. The application of this technique is in the representation of the transport equation in coordinate systems other than the usual rectangular, cylindrical and spherical ones. Its use is demonstrated by transforming the transport equation to a toroidal coordinate system consisting of nested circular toroids. (auth)

Gralnick, S.L.

1975-10-01T23:59:59.000Z

178

Techniques for Enhanced Physical-Layer Security  

E-Print Network (OSTI)

Information-theoretic security--widely accepted as the strictest notion of security--relies on channel coding techniques that exploit the inherent randomness of propagation channels to strengthen the security of communications systems. Within this paradigm, we explore strategies to improve secure connectivity in a wireless network. We first consider the intrinsically secure communications graph (iS-graph), a convenient representation of the links that can be established with information-theoretic security on a large-scale network. We then propose and characterize two techniques--sectorized transmission and eavesdropper neutralization--which are shown to dramatically enhance the connectivity of the iS-graph.

Pinto, Pedro C; Win, Moe Z

2010-01-01T23:59:59.000Z

179

Definition: Geophysical Techniques | Open Energy Information  

Open Energy Info (EERE)

Definition Definition Edit with form History Facebook icon Twitter icon » Definition: Geophysical Techniques Jump to: navigation, search Dictionary.png Geophysical Techniques Geophysics is the study of the structure and composition of the earth's interior.[1] View on Wikipedia Wikipedia Definition Exploration geophysics is the applied branch of geophysics which uses surface methods to measure the physical properties of the subsurface Earth, along with the anomalies in these properties, in order to detect or infer the presence and position of ore minerals, hydrocarbons, geothermal reservoirs, groundwater reservoirs, and other geological structures. Exploration geophysics is the practical application of physical methods (such as seismic, gravitational, magnetic, electrical and electromagnetic)

180

NonBlackBox Techniques in Cryptography  

E-Print Network (OSTI)

Non­Black­Box Techniques in Cryptography Thesis for the Ph.D. Degree by Boaz Barak Under ``Black­Box'' as ``A device or theoretical construct with known or specified performance characteristics a program as a black­box means to use only its input/output relation by executing the program on chosen

Goldreich, Oded

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181

Non-Black-Box Techniques in Cryptography  

E-Print Network (OSTI)

Non-Black-Box Techniques in Cryptography Thesis for the Ph.D. Degree by Boaz Barak Under dictionary defines the term "Black-Box" as "A device or theoretical construct with known or specified of Computer Science, to use a program as a black-box means to use only its input/output relation by executing

Barak, Boaz

182

Best practice techniques for environmental radiological monitoring  

E-Print Network (OSTI)

/Medium Volume Air Sampling (HVAS/MVAS). #12;Science Report Best Practice Techniques for Environmental Community FSA: Food Standards Agency H2O2: Hydrogen peroxide HPA: Health Protection Agency HVAS/MVAS: High/monitoring type code Terrestrial dose rate monitoring T1 Air passive shades and HVAS/MVAS T2 Wet, dry, total

183

Soft computing techniques in ensemble precipitation nowcast  

Science Conference Proceedings (OSTI)

This study presented various soft computing techniques for forecasting the hourly precipitations during tropical cyclones. The purpose of the current study is to present a concise and synthesized documentation of the current level of skill of various ... Keywords: Forecast, Machine learning, Rainfall, Skill score

Chih-Chiang Wei

2013-02-01T23:59:59.000Z

184

Semantic optimization techniques for preference queries  

Science Conference Proceedings (OSTI)

Preference queries are relational algebra or SQL queries that contain occurrences of the winnow operator (find the most preferred tuples in a given relation). Such queries are parameterized by specific preference relations. Semantic optimization techniques ... Keywords: Integrity constraints, Preference queries, Query evaluation, Query optimization

Jan Chomicki

2007-07-01T23:59:59.000Z

185

Verification Techniques for System-Level Design  

Science Conference Proceedings (OSTI)

This book will explain how to verify SoC logic designs using "formal" and "semi-formal" verification techniques. The critical issue to be addressed is whether the functionality of the design is the one that the designers intended. Simulation has been ... Keywords: Circuits, Electricity, Microelectronics

Masahiro Fujita; Indradeep Ghosh; Mukul Prasad

2007-10-01T23:59:59.000Z

186

Clustering techniques for open relation extraction  

Science Conference Proceedings (OSTI)

This work investigates clustering techniques for Relation Extraction (RE). Relation Extraction is the task of extracting relationships among named entities (e.g., people, organizations and geo-political entities) from natural language text. We are particularly ... Keywords: relation extraction, text clustering

Filipe Mesquita

2012-05-01T23:59:59.000Z

187

An Improved, Free Surface, Topographic Technique  

Science Conference Proceedings (OSTI)

Current techniques of water wave visualization such as shadowgraphy and stereo photography are widely used but are deficient in many aspects. Refraction based visualization observes the bending of light as it traverses across a liquid-air interface. ... Keywords: Free Surface, PIV, Topography, Visualization

A. Fouras; K. Hourigan; M. Kawahashi; H. Hirahara

2006-01-01T23:59:59.000Z

188

Adaptive Techniques for Homebased Software DSMs #  

E-Print Network (OSTI)

Adaptive Techniques for Home­based Software DSMs # Lauro Whately 1 , Raquel Pinto 1 , Muralidharan and evaluates Home­based Adaptive Protocol (HAP), a software distributed shared­memory system. HAP performs two with the adaptive system. Keywords---Software Distributed Shared Memory, Home­basedLazy Release Consistency, Home­based

Bianchini, Ricardo

189

A TOMOGRAPHIC TECHNIQUE FOR MAGNETIZED BEAM MATCHING.  

Science Conference Proceedings (OSTI)

To maintain low electron beam temperatures in the proposed RHIC electron cooler, careful matching of the magnetized beam from the source to the cooler solenoid is mandatory. We propose a tomographic technique to diagnose matching conditions. First simulation results will be presented.

MONTAG,C.ET AL.

2004-07-05T23:59:59.000Z

190

Lipid Analysis and Lipidomics: New Techniques & ApplicationChapter 1 Techniques and Applications in Lipid Analysis  

Science Conference Proceedings (OSTI)

Lipid Analysis and Lipidomics: New Techniques & Application Chapter 1 Techniques and Applications in Lipid Analysis Methods and Analyses eChapters Methods - Analyses Books 6BFA9B7918529F3FEC884BD9D5F59B4A AOCS Press D

191

Impedance matched joined drill pipe for improved acoustic transmission  

DOE Patents (OSTI)

An impedance matched jointed drill pipe for improved acoustic transmission. A passive means and method that maximizes the amplitude and minimize the temporal dispersion of acoustic signals that are sent through a drill string, for use in a measurement while drilling telemetry system. The improvement in signal transmission is accomplished by replacing the standard joints in a drill string with joints constructed of a material that is impedance matched acoustically to the end of the drill pipe to which it is connected. Provides improvement in the measurement while drilling technique which can be utilized for well logging, directional drilling, and drilling dynamics, as well as gamma-ray spectroscopy while drilling post shot boreholes, such as utilized in drilling post shot boreholes.

Moss, William C. (San Mateo, CA)

2000-01-01T23:59:59.000Z

192

Real-Time Tool Condition Monitoring Using Wavelet Transforms and Fuzzy Techniques  

E-Print Network (OSTI)

In this paper, wavelet transforms and fuzzy techniques are used to monitor tool breakage and wear conditions in real time according to the measured spindle and feed motor currents, respectively. First, the continuous and discrete wavelet transforms are used to decompose the spindle and feed ac servo motor current signals to extract signal features so as to detect the breakage of drills successfully. Next, the models of the relationships between the current signals and the cutting parameters are established under different tool wear states. Subsequently, fuzzy classification methods are used to detect tool wear states based on the above models. Finally, the two methods above are integrated to establish an intelligent tool condition monitoring system for drilling operations. The monitoring system can detect tool breakage and tool wear conditions using very simple current sensors. Experimental results show that the proposed system can reliably detect tool conditions in drilling operations in real time and is viable for industrial applications.

Xiaoli Li; Shiu Kit Tso; Jun Wang; Senior Member; Senior Member

2000-01-01T23:59:59.000Z

193

Category:Data and Modeling Techniques | Open Energy Information  

Open Energy Info (EERE)

and Modeling Techniques and Modeling Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Geothermalpower.jpg Looking for the Data and Modeling Techniques page? For detailed information on Data and Modeling Techniques as exploration techniques, click here. Category:Data and Modeling Techniques Add.png Add a new Data and Modeling Techniques Technique Subcategories This category has the following 2 subcategories, out of 2 total. D [×] Data Techniques‎ 3 pages M [×] Modeling Techniques‎ 5 pages Pages in category "Data and Modeling Techniques" The following 2 pages are in this category, out of 2 total. D Data Techniques M Modeling Techniques Retrieved from "http://en.openei.org/w/index.php?title=Category:Data_and_Modeling_Techniques&oldid=689801"

194

Definition: Seismic Techniques | Open Energy Information  

Open Energy Info (EERE)

Techniques Techniques Seismic methods provide information regarding the elastic properties of the subsurface through the measurement of the propagation velocity of elastic waves.[1] View on Wikipedia Wikipedia Definition Seismology /saÉȘzˈmɒlədʒi/ is the scientific study of earthquakes and the propagation of elastic waves through the Earth or through other planet-like bodies. The field also includes studies of earthquake effects, such as tsunamis as well as diverse seismic sources such as volcanic, tectonic, oceanic, atmospheric, and artificial processes (such as explosions). A related field that uses geology to infer information regarding past earthquakes is paleoseismology. A recording of earth motion as a function of time is called a seismogram. A seismologist

195

Tools and techniques for Network Forensics  

E-Print Network (OSTI)

Network forensics deals with the capture, recording and analysis of network events in order to discover evidential information about the source of security attacks in a court of law. This paper discusses the different tools and techniques available to conduct network forensics. Some of the tools discussed include: eMailTrackerPro to identify the physical location of an email sender; Web Historian to find the duration of each visit and the files uploaded and downloaded from the visited website; packet sniffers like Etherea to capture and analyze the data exchanged among the different computers in the network. The second half of the paper presents a survey of different IP traceback techniques like packet marking that help a forensic investigator to identify the true sources of the attacking IP packets. We also discuss the use of Honeypots and Honeynets that gather intelligence about the enemy and the tools and tactics of network intruders.

Meghanathan, Natarajan; Moore, Loretta A

2010-01-01T23:59:59.000Z

196

Target Dependent Score Normalization Techniques and . . .  

E-Print Network (OSTI)

Score normalization methods in biometric verification, which encompass the more traditional user-dependent decision thresholding techniques, are reviewed from a test hypotheses point of view. These are classified into test dependent and target dependent methods. The focus of the paper is on target dependent methods, which are further classified into impostor-centric, target-centric and target-impostor. These are applied to an on-line signature verification system on signature data from SVC 2004. In particular, a target-centric technique based on a variant of the cross-validation procedure provides the best relative performance improvement both for skilled (19%) and random forgeries (53%) as compared to the raw verification performance without score normalization (7.14% EER and 1.06% EER for skilled and random forgeries respectively).

J. Fierrez-Aguilar; J. Ortega-Garcia; J. Gonzalez-Rodriguez

2005-01-01T23:59:59.000Z

197

Active load control techniques for wind turbines.  

DOE Green Energy (OSTI)

This report provides an overview on the current state of wind turbine control and introduces a number of active techniques that could be potentially used for control of wind turbine blades. The focus is on research regarding active flow control (AFC) as it applies to wind turbine performance and loads. The techniques and concepts described here are often described as 'smart structures' or 'smart rotor control'. This field is rapidly growing and there are numerous concepts currently being investigated around the world; some concepts already are focused on the wind energy industry and others are intended for use in other fields, but have the potential for wind turbine control. An AFC system can be broken into three categories: controls and sensors, actuators and devices, and the flow phenomena. This report focuses on the research involved with the actuators and devices and the generated flow phenomena caused by each device.

van Dam, C.P. (University of California, Davis, CA); Berg, Dale E.; Johnson, Scott J. (University of California, Davis, CA)

2008-07-01T23:59:59.000Z

198

A Radiographic Technique With Heavy Ion Microbeams  

SciTech Connect

In this work, we introduce a new technique to perform densitometric and multielemental analysis of samples at the same time using a simple detector with heavy ion micro-beams. It consists in the simultaneous analysis of X-rays induced in the sample and in a secondary target arranged behind the specimen. The X-rays originated in the secondary target are attenuated when crossing the specimen producing a radiographic image with a monochromatic source.

Muscio, J. [ECyT, UNSAM, 1650 San Martin, Buenos Aires (Argentina); Somacal, H.; Burlon, A. A.; Debray, M. E.; Valda, A. A. [ECyT, UNSAM, 1650 San Martin, Buenos Aires (Argentina); U.A. Fisica, Laboratorio TANDAR, CNEA, 1650 San Martin, Buenos Aires (Argentina); Kreiner, A. J. [U.A. Fisica, Laboratorio TANDAR, CNEA, 1650 San Martin, Buenos Aires (Argentina); ECyT, UNSAM, 1650 San Martin, Buenos Aires (Argentina); CONICET (Argentina); Kesque, J. M.; Minsky, D. M. [U.A. Fisica, Laboratorio TANDAR, CNEA, 1650 San Martin, Buenos Aires (Argentina)

2007-02-12T23:59:59.000Z

199

Geothermal drilling and completion technology development  

SciTech Connect

The high cost of drilling and completing geothermal wells is an impediment to the development of geothermal energy resources. Technological deficiencies in rotary drilling techniques are evidenced when drilling geothermal wells. The Division of Geothermal Energy (DGE) of the U.S. Department of Energy has initiated a program aimed at developing new drilling and completion techniques for geothermal wells. The goals of this program are to reduce well costs by 25% by 1982 and by 50% by 1986. Sandia Laboratories has been selected to manage this technology development program, and this paper presents an overview of the program. Program justification which relates well cost to busbar energy cost and to DGE power-on-line goals is presented. Technological deficiencies in current rotary drilling techniques for geothermal wells are discussed. A program for correcting these deficiencies is described.

Varnado, S.G.; Stoller, H.M.

1978-01-01T23:59:59.000Z

200

Research review: Indoor air quality control techniques  

Science Conference Proceedings (OSTI)

Techniques for controlling the concentration of radon, formaldehyde, and combustion products in the indoor air are reviewed. The most effective techniques, which are generally based on limiting or reducing indoor pollutant source strengths, can decrease indoor pollutant concentrations by a factor of 3 to 10. Unless the initial ventilation rate is unusually low, it is difficult to reduce indoor pollutant concentrations more than approximately 50% by increasing the ventilation rate of an entire building. However, the efficiency of indoor pollutant control by ventilation can be enhanced through the use of local exhaust ventilation near concentrated sources of pollutants, by minimizing short circuiting of air from supply to exhaust when pollutant sources are dispersed and, in some situations, by promoting a displacement flow of air and pollutants toward the exhaust. Active air cleaning is also examined briefly. Filtration and electrostatic air cleaning for removal of particles from the indoor air are the most practical and effective currently available techniques of air cleaning. 49 refs., 7 figs.

Fisk, W.J.

1986-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "techniques drilling techniques" from the National Library of EnergyBeta (NLEBeta).
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they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Consider trigeneration techniques for process plants  

SciTech Connect

Trigeneration has, until recently, been used exclusively for air conditioning systems with small or moderate capacities. However, with more recent chiller packages providing larger capacities, and with modern cogeneration applications, trigeneration is now open to a wider range of process applications. It can provide tremendous hydrocarbon processing industry opportunities for more economical use of energy. Cogeneration is the most widely used technique for producing heat and power. If refrigeration is also produced form the same energy source, then the cogeneration simply becomes trigeneration. The technique is not new, it is commonly used in district heating and cooling schemes. However, trigeneration is being used more in the oil and gas, and petrochemical industries as three products--heat, power and refrigeration--are frequently needed in many modern processes. Moreover, this technique provides a wide scope for technical advances. The paper discusses the equipment needed as driver, waste heat recovery, refrigeration equipment, thermodynamics, capacity size limits, different trigeneration configurations, economics, and design enhancements to improve operating economy.

Dharmadhikari, S. [Ingerop, Paris (France)

1997-07-01T23:59:59.000Z

202

Applications of 3D Experimental Techniques Across Length Scales  

Science Conference Proceedings (OSTI)

Jul 11, 2012... Experimental Techniques Across Length Scales: Non-Destructive Techniques .... The efficient image-processing pipeline provides a full 3D ...

203

Well Log Techniques At Newberry Caldera Area (DOE GTP) | Open...  

Open Energy Info (EERE)

Newberry Caldera Area (DOE GTP) Exploration Activity Details Location Newberry Caldera Area Exploration Technique Well Log Techniques Activity Date Usefulness not indicated...

204

Category:Passive Seismic Techniques | Open Energy Information  

Open Energy Info (EERE)

search GEOTHERMAL ENERGYGeothermal Home Geothermalpower.jpg Looking for the Passive Seismic Techniques page? For detailed information on Passive Seismic Techniques,...

205

Techniques of Nanoscale Silicon Texturing of Solar Cells ...  

Patent 6,329,296: Metal catalyst technique for texturing silicon solar cells Textured silicon solar cells and techniques for their manufacture ...

206

ALS Scientists Patent Technique To Dramatically Advance Grating...  

NLE Websites -- All DOE Office Websites (Extended Search)

ALS Scientists Patent Technique To Dramatically Advance Grating-Based Spectroscopy ALS Scientists Patent Technique To Dramatically Advance Grating-Based Spectroscopy Print Tuesday,...

207

Underbalanced drilling solves difficult drilling problems and enhances production  

Science Conference Proceedings (OSTI)

An alternate approach to drilling, completing and working over new and existing wells has dramatically improved the efficiency of these operations. This method is called underbalanced drilling (UBD). Improvements in both the equipment and technique during the past 5 years have made this process economical and necessary to solve many difficult drilling problems. Additionally, by reducing drilling or workover damage, dramatic improvements in oil and gas production rates and ultimate reserves are realized, resulting in extra profits for today`s operators. This article will detail the advantages of UBD and give specific examples of its applications, A series of related articles will follow, including: new UBD equipment, land and off-shore case histories, coiled tubing drilling, underbalanced workovers, software technology and subsea applications to examine the reality and future of this technology.

Cuthbertson, R.L.; Vozniak, J.

1997-02-01T23:59:59.000Z

208

Full-scale facility for evaluating lost circulation materials and techniques  

DOE Green Energy (OSTI)

Sandia National Laboratories has designed and built a full-scale facility for the evaluation of lost circulation materials and techniques under simulated down-hole geothermal wellbore conditions. System capabilities include a maximum temperature of 400/sup 0/F, maximum allowed working pressure of 1150 psi, and a variable pumping rate up to 280 gpm at 1000 psi. The system will be utilized to evaluate candidate lost circulation materials and techniques that may be useful to solving geothermal well drilling lost circulation problems.

Loeppke, G.E.; Caskey, B.C.

1983-01-01T23:59:59.000Z

209

Category:Ground Electromagnetic Techniques | Open Energy Information  

Open Energy Info (EERE)

Ground Electromagnetic Techniques Ground Electromagnetic Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Geothermalpower.jpg Looking for the Ground Electromagnetic Techniques page? For detailed information on Ground Electromagnetic Techniques, click here. Category:Ground Electromagnetic Techniques Add.png Add a new Ground Electromagnetic Techniques Technique Subcategories This category has the following 2 subcategories, out of 2 total. E [×] Electromagnetic Profiling Techniques‎ 1 pages [+] Electromagnetic Sounding Techniques‎ (1 categories) 2 pages Pages in category "Ground Electromagnetic Techniques" The following 2 pages are in this category, out of 2 total. E Electromagnetic Profiling Techniques Electromagnetic Sounding Techniques Retrieved from "http://en.openei.org/w/index.php?title=Category:Ground_Electromagnetic_Techniques&oldid=689834"

210

Underbalanced drilling with air offers many pluses  

Science Conference Proceedings (OSTI)

A pressure overbalance during conventional drilling can cause significant fluid filtrate invasion and lost circulation. Fluid invasion into the formation can lead to formation damage, high mud costs, a need for expensive completions, and well productivity impairment. Because underbalanced drilling creates a natural tendency for fluid and gas to flow from the formation to the borehole, successful underbalanced drilling depends upon the appropriate selection of circulating fluid. The use of a compressible fluid in the circulating system, referred to as air drilling, lowers the downhole pressure, allowing drilling into and beyond these sensitive formations. The paper discusses the equipment needed; well control; downhole air requirements; air drilling techniques using dry air, air-mist, stable foam, stiff foam, and aerated-fluid; downhole fires; directional air drilling; and well completions.

Shale, L. [Baker Hughes Inteq, Houston, TX (United States)

1995-06-26T23:59:59.000Z

211

Geologic flow characterization using tracer techniques  

DOE Green Energy (OSTI)

A new tracer flow-test system has been developed for in situ characterization of geologic formations. This report describes two sets of test equipment: one portable and one for testing in deep formations. Equations are derived for in situ detector calibration, raw data reduction, and flow logging. Data analysis techniques are presented for computing porosity and permeability in unconfined isotropic media, and porosity, permeability and fracture characteristics in media with confined or unconfined two-dimensional flow. The effects of tracer pulse spreading due to divergence, dispersion, and porous formations are also included.

Klett, R. D.; Tyner, C. E.; Hertel, Jr., E. S.

1981-04-01T23:59:59.000Z

212

Inverse Raman effect: applications and detection techniques  

SciTech Connect

The processes underlying the inverse Raman effect are qualitatively described by comparing it to the more familiar phenomena of conventional and stimulated Raman scattering. An experession is derived for the inverse Raman absorption coefficient, and its relationship to the stimulated Raman gain is obtained. The power requirements of the two fields are examined qualitatively and quantitatively. The assumption that the inverse Raman absorption coefficient is constant over the interaction length is examined. Advantages of the technique are discussed and a brief survey of reported studies is presented.

Hughes, L.J. Jr.

1980-08-01T23:59:59.000Z

213

Dismantling techniques for reactor steel piping  

SciTech Connect

Two cutting techniques have been developed for dismantling the pipes connected to the Japan Power Demonstration Reactor (JPDR) pressure vessel. They are the rotary disk knife cutting system for dismantling relatively large pipes, such as the primary cooling system, and the shaped explosive cutting systems for cutting relatively small pipes in air or water. Basic cutting tests were performed to determine the optimum characteristics of the cutting systems and to conduct a safety evaluation by studying the effects of blasting on surrounding areas. Mock-up tests confirmed the applicability of the newly developed dismantling systems for JPDR dismantlement by successfully cutting test pipes with these systems.

Yanagihara, S.; Hiraga, F.; Nakamura, H. (Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan))

1989-08-01T23:59:59.000Z

214

Image Recognition Techniques for Gamma Spectroscopy  

SciTech Connect

Photons, after generated from a radioactive source and before they deposit their energy in a photo detector, are subsequent to multiple scattering mechanisms. As a result, the measured energy from the photo detector is different from the energy the photon had when generated. This is known as folding of the photon energy. Moreover, statistical fluctuation inside the detector contribute to energy folding. In this work, a new method is presented for unfolding the gamma ray spectrum. The method uses a 2-dimensional representation of the measured spectrum (image) and then uses image recognition techniques, and especially differential edge detection, to generate the original spectrum.

Vlachos, D. S. [University of Peloponnese, 22100 Tripoli (Greece); Tsabaris, C. G. [Hellenic Center for Marine Research, 19013 Athens (Greece)

2007-12-26T23:59:59.000Z

215

Category:Borehole Seismic Techniques | Open Energy Information  

Open Energy Info (EERE)

Borehole Seismic Techniques page? Borehole Seismic Techniques page? For detailed information on Borehole Seismic Techniques as exploration techniques, click here. Category:Borehole Seismic Techniques Add.png Add a new Borehole Seismic Techniques Technique Pages in category "Borehole Seismic Techniques" The following 2 pages are in this category, out of 2 total. S Single-Well And Cross-Well Seismic V Vertical Seismic Profiling Retrieved from "http://en.openei.org/w/index.php?title=Category:Borehole_Seismic_Techniques&oldid=601962" Category: Downhole Techniques What links here Related changes Special pages Printable version Permanent link Browse properties About us Disclaimers Energy blogs Linked Data Developer services OpenEI partners with a broad range of international organizations to grow

216

Opening criteria for accelerated paving techniques  

E-Print Network (OSTI)

Fast track paving or accelerated pavement design is the rapid replacement of portland cement concrete pavement, allowing for the reopening to traffic under specific time requirements. The purpose of this research is to develop opening criteria for accelerated paving and implementing these criteria into a set of guidelines for fast track paving. This report is broken into three specific sections; review of practice, an analysis of field and lab research, and finally design guidelines for the opening criteria for accelerated paving techniques. A review of practice was developed to update the reader on the current "state of the art". This review outlines contruction techniques, fast track mix design, pavement design, and joint design. The analysis of field and lab research provides a synopsis of the experimentation used to develop design guidelines for opening criteria. This section includes crack surveys, coring tests, FWD testing, maturity testing, penetration testing and consistency testing. The design guidelines for early opening criteria provides guidelines for use in intersection design. The guideline outlines requirements for design, design of concrete pavement materials, mixture design, construction considerations, and requirements for opening criteria. This document will update the reader on the subject of fast track paving and the methods used to research it. Finally, with a design guidelines the reader will be able to apply the methods of analysis described in the field and lab testing section to create better pavements more efficiently.

Johnson, Jason Leonard

1993-01-01T23:59:59.000Z

217

Dosimetry tools and techniques for IMRT  

Science Conference Proceedings (OSTI)

Intensity modulated radiation therapy (IMRT) poses a number of challenges for properly measuring commissioning data and quality assurance (QA) radiation dose distributions. This report provides a comprehensive overview of how dosimeters, phantoms, and dose distribution analysis techniques should be used to support the commissioning and quality assurance requirements of an IMRT program. The proper applications of each dosimeter are described along with the limitations of each system. Point detectors, arrays, film, and electronic portal imagers are discussed with respect to their proper use, along with potential applications of 3D dosimetry. Regardless of the IMRT technique utilized, some situations require the use of multiple detectors for the acquisition of accurate commissioning data. The overall goal of this task group report is to provide a document that aids the physicist in the proper selection and use of the dosimetry tools available for IMRT QA and to provide a resource for physicists that describes dosimetry measurement techniques for purposes of IMRT commissioning and measurement-based characterization or verification of IMRT treatment plans. This report is not intended to provide a comprehensive review of commissioning and QA procedures for IMRT. Instead, this report focuses on the aspects of metrology, particularly the practical aspects of measurements that are unique to IMRT. The metrology of IMRT concerns the application of measurement instruments and their suitability, calibration, and quality control of measurements. Each of the dosimetry measurement tools has limitations that need to be considered when incorporating them into a commissioning process or a comprehensive QA program. For example, routine quality assurance procedures require the use of robust field dosimetry systems. These often exhibit limitations with respect to spatial resolution or energy response and need to themselves be commissioned against more established dosimeters. A chain of dosimeters, from secondary standards to field instruments, is established to assure the quantitative nature of the tests. This report is intended to describe the characteristics of the components of these systems; dosimeters, phantoms, and dose evaluation algorithms. This work is the report of AAPM Task Group 120.

Low, Daniel A.; Moran, Jean M.; Dempsey, James F.; Dong Lei; Oldham, Mark [Washington University, St. Louis, Missouri 63110 (United States); University of Michigan, Ann Arbor, Michigan 48109 (United States); Viewray Incorporated, Cleveland, Ohio 44106 (United States); M. D. Anderson Cancer Center, Houston, Texas 77013 (United States); Duke University Medical Center, Durham, North Carolina 27710 (United States)

2011-03-15T23:59:59.000Z

218

Technique for ship/wake detection  

DOE Patents (OSTI)

An automated ship detection technique includes accessing data associated with an image of a portion of Earth. The data includes reflectance values. A first portion of pixels within the image are masked with a cloud and land mask based on spectral flatness of the reflectance values associated with the pixels. A given pixel selected from the first portion of pixels is unmasked when a threshold number of localized pixels surrounding the given pixel are not masked by the cloud and land mask. A spatial variability image is generated based on spatial derivatives of the reflectance values of the pixels which remain unmasked by the cloud and land mask. The spatial variability image is thresholded to identify one or more regions within the image as possible ship detection regions.

Roskovensky, John K. (Albuquerque, NM)

2012-05-01T23:59:59.000Z

219

Techniques and methods in nuclear materials traceability  

SciTech Connect

The nonproliferation community is currently addressing concerns that the access to special nuclear materials may increase the illicit trafficking in weapons-usable materials from civil and/or weapons material stores and/or fuel cycles systems. Illicit nuclear traffic usually involves reduced quantities of nuclear materials perhaps as samplings of a potential protracted diversionary flow from sources to users. To counter illicit nuclear transactions requires the development of techniques and methods in nuclear material traceability as an important phase of a broad forensic analysis capability. This report discusses how isotopic signatures and correlation methods were applied to determine the origins of Highly Enriched Uranium (HEU) and Plutonium samples reported as illicit trafficking in nuclear materials.

Persiani, P.J.

1996-08-01T23:59:59.000Z

220

Photovoltaic I-V curve measurement techniques  

SciTech Connect

Performance evaluation of photovoltaic (PV) arrays under actual field conditions provides important feedback to the module design process. One of the principal methods for assessing an array's performance is to plot its current, I, versus voltage, V, curve. Following a brief review of techniques for measuring the I-V curve, a new, capacitive-based approach is presented. It uses a rapid sweep of the I-V curve that substantially reduces the average power transfer between array and load, and in turn, substantially reduces the size and weight of the curve tracer. Both theoretical and practical aspects of the approach are presented for a 10-kW unit. Performance is verified by comparison with I-V curves obtained by using a conventional load. The agreement is found to be excellent. Approximately an order of magnitude reduction in size, weight and power consumption over conventional units was realized with the experimental I-V curve tracer.

Cox, C.H.; Warner, T.H.

1982-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "techniques drilling techniques" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Improved modeling techniques for turbomachinery flow fields  

DOE Green Energy (OSTI)

This program has the objective of developing an improved methodology for modeling turbomachinery flow fields, including the prediction of losses and efficiency. Specifically, the program addresses the treatment of the mixing stress tensor terms attributed to deterministic flow field mechanisms required in steady-state Computational Fluid Dynamic (CFD) models for turbomachinery flow fields. These mixing stress tensors arise due to spatial and temporal fluctuations (in an absolute frame of reference) caused by rotor-stator interaction due to various blade rows and by blade-to-blade variation of flow properties. This will be accomplished in a cooperative program by Penn State University and the Allison Engine Company. These tasks include the acquisition of previously unavailable experimental data in a high-speed turbomachinery environment, the use of advanced techniques to analyze the data, and the development of a methodology to treat the deterministic component of the mixing stress tenor.

Lakshminarayana, B.; Fagan, J.R. Jr.

1995-12-31T23:59:59.000Z

222

RFID tags: Positioning principles and localization techniques  

E-Print Network (OSTI)

Abstract—RFID is an automatic identification technology that enables tracking of people and objects. Both identity and location are generally key information for indoor services. An obvious and interesting method to obtain these two types of data is to localize RFID tags attached to devices or objects or carried by people. However, signals in indoor environments are generally harshly impaired and tags have very limited capabilities which pose many challenges for positioning them. In this work, we propose a classification and survey the current state-of-art of RFID localization by first presenting this technology and positioning principles. Then, we explain and classify RFID localization techniques. Finally, we discuss future trends in this domain. Index Terms—RFID, localization, positioning algorithm. I.

Mathieu Bouet; Aldri L. Dos Santos

2008-01-01T23:59:59.000Z

223

Artificial Intelligence Techniques for Steam Generator Modelling  

E-Print Network (OSTI)

This paper investigates the use of different Artificial Intelligence methods to predict the values of several continuous variables from a Steam Generator. The objective was to determine how the different artificial intelligence methods performed in making predictions on the given dataset. The artificial intelligence methods evaluated were Neural Networks, Support Vector Machines, and Adaptive Neuro-Fuzzy Inference Systems. The types of neural networks investigated were Multi-Layer Perceptions, and Radial Basis Function. Bayesian and committee techniques were applied to these neural networks. Each of the AI methods considered was simulated in Matlab. The results of the simulations showed that all the AI methods were capable of predicting the Steam Generator data reasonably accurately. However, the Adaptive Neuro-Fuzzy Inference system out performed the other methods in terms of accuracy and ease of implementation, while still achieving a fast execution time as well as a reasonable training time.

Wright, Sarah

2008-01-01T23:59:59.000Z

224

Customising Graphics Applications: Techniques and Programming Interface  

E-Print Network (OSTI)

This paper identifies opportunities for customising architectures for graphics applications, such as infrared simulation and geometric visualisation. We have studied methods for exploiting custom data formats and datapath widths, and for optimising graphics operations such as texture mapping and hidden-surface removal. Techniques for balancing the graphics pipeline and for runtime reconfiguration have been implemented. The customised architectures are captured in Handel-C, a Clike language supporting parallelism and flexible data size, and compiled for Xilinx 4000 and Virtex FPGAs. We have also developed an application programming interface based on the OpenGL standard for automatic speedup of graphics applications, including the Quake 2 action game. 1 Introduction Despite tremendous progress in the last thirty years, real-time generation of realistic images still offers many challenges. The demand for realism requires improvement in algorithms, frame rate and resolution, while the v...

Henry Styles And; Henry Styles; Wayne Luk

2000-01-01T23:59:59.000Z

225

Techniques for Intravascular Foreign Body Retrieval  

SciTech Connect

As endovascular therapies increase in frequency, the incidence of lost or embolized foreign bodies is increasing. The presence of an intravascular foreign body (IFB) is well recognized to have the potential to cause serious complications. IFB can embolize and impact critical sites such as the heart, with subsequent significant morbidity or mortality. Intravascular foreign bodies most commonly result from embolized central line fragments, but they can originate from many sources, both iatrogenic and noniatrogenic. The percutaneous approach in removing an IFB is widely perceived as the best way to retrieve endovascular foreign bodies. This minimally invasive approach has a high success rate with a low associated morbidity, and it avoids the complications related to open surgical approaches. We examined the characteristics, causes, and incidence of endovascular embolizations and reviewed the various described techniques that have been used to facilitate subsequent explantation of such materials.

Woodhouse, Joe B.; Uberoi, Raman, E-mail: raman.uberoi@orh.nhs.uk [Oxford University Hospitals (United Kingdom)

2013-08-01T23:59:59.000Z

226

Renormalization group invariance in the Pinch Technique  

E-Print Network (OSTI)

We show how to construct, using an elementary extension of the Pinch Technique, all off-shell Green's functions of a non-Abelian gauge theory so that they are locally gauge-invariant and renormalization-group invariant (RGI), as the S-matrix is, as well as being process-independent, coupling-constant independent (dimensional transmutation), and satisfying QED-like Ward identities. We call these PT-RGI Green's functions and outline how to construct an approximate three-gluon PT-RGI vertex with three physical scales and no dependence on the renormalization point $\\mu$. Properties of the PT-RGI Schwinger-Dyson equations are discussed, mostly in the context of a modified form of $\\phi^3_6$. The PT-RGI property of all off-shell Green's functions, plus other work of long ago, leads to a near-realization of the old dreams of S-matrix theorists.

Cornwall, John M

2011-01-01T23:59:59.000Z

227

Interferometer Techniques for Gravitational-Wave Detection  

E-Print Network (OSTI)

Several km-scale gravitational-wave detectors have been constructed world wide. These instruments combine a number of advanced technologies to push the limits of precision length measurement. The core devices are laser interferometers of a new kind; developed from the classical Michelson topology these interferometers integrate additional optical elements, which significantly change the properties of the optical system. Much of the design and analysis of these laser interferometers can be performed using well-known classical optical techniques, however, the complex optical layouts provide a new challenge. In this review we give a textbook-style introduction to the optical science required for the understanding of modern gravitational wave detectors, as well as other high-precision laser interferometers. In addition, we provide a number of examples for a freely available interferometer simulation software and encourage the reader to use these examples to gain hands-on experience with the discussed optical methods.

Andreas Freise; Kenneth Strain

2009-09-21T23:59:59.000Z

228

Numerical techniques of rigid body simulation  

E-Print Network (OSTI)

In recent years, the modeling of physical phenomena has become an integral part of computer applications in diverse areas from engineering to entertainment. This thesis focuses on a particular aspect of this modeling, the simulation of rigid bodies. Complicated simulations require the development of sophisticated collision detection systems and numerical techniques. Previous work in the field has almost exclusively been restricted to geometries that are convex or a union of convex pieces. One of the goals of this thesis is overcoming this restriction. Collision detection is only one of the many hurdles which arise in simulating collisions between rigid bodies. To calculate the appropriate response of colliding bodies, the point of contact between the bodies must be determined. Methods of contact point determination will also be discussed. This thesis also explores the issues of resolving simultaneous collisions and resting contact via the formulation of a linear complementarity problem (LCP). This method maintains the physical validity of the simulator, unlike penalty methods which are often used. Impulse based methods for resting contacts have been proposed and implemented by others, but cannot simulate simple structures, such as a stack of blocks. The LCP formulation allows these types of configurations, which are successfully simulated in this thesis. The culmination of this thesis is the development of a rigid body simulator. The numerical methods and algorithms employed are discussed and are compared to alternative techniques. The intention is that the reader use this thesis and its references to ease the process of writing a new simulator and gain insight into the methods used.

Eberle, David Michael

2001-01-01T23:59:59.000Z

229

Category:Remote Sensing Techniques | Open Energy Information  

Open Energy Info (EERE)

Remote Sensing Techniques Remote Sensing Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Geothermalpower.jpg Looking for the Remote Sensing Techniques page? For detailed information on remote sensing techniques used as a geothermal exploration technique, click here. Category: Remote Sensing Techniques Add.png Add a new Remote Sensing Technique Subcategories This category has the following 2 subcategories, out of 2 total. A [+] Active Sensors‎ (1 categories) 2 pages P [×] Passive Sensors‎ 13 pages Pages in category "Remote Sensing Techniques" The following 2 pages are in this category, out of 2 total. A Active Sensors L Long-Wave Infrared Retrieved from "http://en.openei.org/w/index.php?title=Category:Remote_Sensing_Techniques&oldid=594055"

230

Alternative Fuels Data Center: Techniques for Drivers to Conserve Fuel  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Techniques for Drivers Techniques for Drivers to Conserve Fuel to someone by E-mail Share Alternative Fuels Data Center: Techniques for Drivers to Conserve Fuel on Facebook Tweet about Alternative Fuels Data Center: Techniques for Drivers to Conserve Fuel on Twitter Bookmark Alternative Fuels Data Center: Techniques for Drivers to Conserve Fuel on Google Bookmark Alternative Fuels Data Center: Techniques for Drivers to Conserve Fuel on Delicious Rank Alternative Fuels Data Center: Techniques for Drivers to Conserve Fuel on Digg Find More places to share Alternative Fuels Data Center: Techniques for Drivers to Conserve Fuel on AddThis.com... More in this section... Idle Reduction Parts & Equipment Maintenance Driving Behavior Management Strategies Driver Techniques Fleet Rightsizing

231

Advanced Diamond Anvil Techniques (Customized Diamond Anvils)  

Science Conference Proceedings (OSTI)

A complete set of diamond-based fabrication tools now exists for making a wide range of different types of diamond anvils which are tailored for various high-P applications. Current tools include: CVD diamond deposition (making diamond); Diamond polishing, laser drilling, plasma etching (removal of diamond); and Lithography, 3D laser pantography (patterning features onto diamond); - Metal deposition (putting electrical circuits and metal masks onto diamond). Current applications include the following: Electrical Conductivity; Magnetic Susceptibility; and High-P/High-T. Future applications may include: NMR; Hall Effect; de Haas - Shubnikov (Fermi surface topology); Calorimetry; and thermal conductivity.

Weir, S

2009-02-11T23:59:59.000Z

232

Deep Drilling Basic Research: Volume 5 - System Evaluations. Final Report, November 1988--August 1990  

Science Conference Proceedings (OSTI)

This project is aimed at decreasing the costs and increasing the efficiency of drilling gas wells in excess of 15,000 feet. This volume presents a summary of an evaluation of various drilling techniques. Drilling solutions were compared quantitatively against typical penetration rates derived from conventional systems. A qualitative analysis measured the impact of a proposed system on the drilling industry. The evaluations determined that the best candidates f o r improving the speed and efficiency of drilling deep gas wells include: PDC/TSD bits, slim-hole drilling, roller-cone bits, downhole motors, top-driven systems, and coiled-tubing drilling.

None

1990-06-01T23:59:59.000Z

233

VLF Technique and Science in India  

Science Conference Proceedings (OSTI)

Since IGY period (1957-58), natural and artificially produced Very Low Frequency (VLF) electromagnetic radiations are being recorded at large number of ground stations and on board satellites to study various wave-plasma interactive phenomena. The terrestrial propagation of these VLF radio waves are primarily enabled through the earth ionosphere wave guide (EIWG) system to long horizontal distances around the globe and ducted along the geomagnetic field lines into the conjugate hemisphere through the ionosphere-plasmasphere-magnetosphere routes. The time frequency spectra indicate presence of dispersion and various cut-off frequencies providing several types of received signals like whistlers, chorus, tweeks, hiss, hisslers etc., which can be heard on an earphone with distinguishing audio structures. While the VLF technique has been a very effective tool for studying middle and high latitude phenomena, the importance of various anomalous characteristics over the Indian low latitude stations provide potentially new challenges for their scientific interpretation and modelling. The ducted and non-ducted propagation, low latitude TRIMPI/TLE effects, D-region ionisation perturbations due to solar and stellar x- and {gamma} ray emissions and detecting precursors of seismic activities are a few problems which will gain from low latitude studies. Since the conjugate points of Indian stations lie over the Indian oceanic region, the VLF propagation effects would be relatively noise free to observe rare and new phenomena requiring better SNR to detect such changes. The VLF signals emanating from the active seismic zones would require high sensitivity of the system and suitable network of transmitting and receiving stations. Results obtained on whistlers and related studies from a number of Indian stations covering geomagnetic latitude range between 13-24 deg. N are mentioned and reviewed in the background of theoretical understanding of the lightning return stroke signal elements, VLF propagation through cold plasma, ionospheric wave guide mode, electron precipitation due to cyclotron resonance and production of ionisation in the D-region due to solar/stellar UV/X/{gamma}-rays. Further use of the VLF technique in terms of improving both observational data for real time monitoring/modelling of geophysical phenomena and exploring space weather conditions are considered as part of a future Indian programme.

Chakravarty, S. C. [Member, Governing Body, Indian Centre for Space Physics, Kolkata (India)

2010-10-20T23:59:59.000Z

234

Category:Well Log Techniques | Open Energy Information  

Open Energy Info (EERE)

Category Category Edit History Facebook icon Twitter icon » Category:Well Log Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Geothermalpower.jpg Looking for the Well Log Techniques page? For detailed information on Well Log Techniques as exploration techniques, click here. Category:Well Log Techniques Add.png Add a new Well Log Techniques Technique Pages in category "Well Log Techniques" The following 17 pages are in this category, out of 17 total. A Acoustic Logs C Caliper Log Cement Bond Log Chemical Logging Cross-Dipole Acoustic Log D Density Log F FMI Log G Gamma Log I Image Logs M Mud Logging N Neutron Log P Pressure Temperature Log R Resistivity Log Resistivity Tomography S Single-Well and Cross-Well Resistivity Spontaneous Potential Well Log Stoneley Analysis

235

Category:Electromagnetic Profiling Techniques | Open Energy Information  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Category Edit History Facebook icon Twitter icon » Category:Electromagnetic Profiling Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Geothermalpower.jpg Looking for the Electromagnetic Profiling Techniques page? For detailed information on Electromagnetic Profiling Techniques, click here. Category:Electromagnetic Profiling Techniques Add.png Add a new Electromagnetic Profiling Techniques Technique Pages in category "Electromagnetic Profiling Techniques" This category contains only the following page. F Frequency-Domain Electromagnetic Survey Retrieved from "http://en.openei.org/w/index.php?title=Category:Electromagnetic_Profiling_Techniques&oldid=689835"

236

Surface Roughness Parameter Estimated with a Drag Technique  

Science Conference Proceedings (OSTI)

The surface roughness parameter, z0, can be estimated with different techniques. These techniques are analyzing the mean wind profile, estimating the surface drag coefficient and using the universal functions according to the Monin-Obukhov ...

Adrie F. G. Jacobs; Emile Schols

1986-11-01T23:59:59.000Z

237

Interpreting Meteorological Satellite Images Using a Color-Composite Technique  

Science Conference Proceedings (OSTI)

An image-display technique is described that simultaneously combines three meteorological satellite images into a color-image product. The technique reveals many features of meteorological interest. It is frequently noted that interpretations of ...

Robert P. d'Entremont; Larry W. Thomason

1987-07-01T23:59:59.000Z

238

Survey and evaluation of techniques to augment convective heat transfer  

E-Print Network (OSTI)

This report presents a survey and evaluation of the numerous techniques which have been shown to augment convective heat transfer. These techniques are: surface promoters, including roughness and treatment; displaced ...

Bergles A. E.

1965-01-01T23:59:59.000Z

239

Homogenization Techniques for European Monthly Mean Surface Pressure Series  

Science Conference Proceedings (OSTI)

The quality of 51 series of surface pressure (extending back to between 1780 and 1871) over Europe is assessed using three different homogenization techniques. A new technique introduced here based on an iteration of multiple qualitative ...

V. C. Slonosky; P. D. Jones; T. D. Davies

1999-08-01T23:59:59.000Z

240

A Stereo Photogrammetric Technique Applied to Orographic Convection  

Science Conference Proceedings (OSTI)

This paper describes a technique for photogrammetric analysis of stereo pairs of images that is applied to the study of orographic convection. The technique is designed for use with digital images and assumes detailed knowledge of the camera ...

Joseph A. Zehnder; Jiuxiang Hu; Anshuman Razdan

2007-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "techniques drilling techniques" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Advanced illumination techniques for GPU-based volume raycasting  

Science Conference Proceedings (OSTI)

Volume raycasting techniques are important for both visual arts and visualization. They allow efficient generation of visual effects and visualization of scientific data obtained by tomography or numerical simulation. Volume-rendering techniques are ...

Markus Hadwiger; Patric Ljung; Christof Rezk Salama; Timo Ropinski

2009-08-01T23:59:59.000Z

242

New geometric techniques for linear programming and graph partitioning  

E-Print Network (OSTI)

In this thesis, we advance a collection of new geometric techniques for the analysis of combinatorial algorithms. Using these techniques, we resolve several longstanding questions in the theory of linear programming, ...

Kelner, Jonathan, 1980-

2006-01-01T23:59:59.000Z

243

A Proposed Technique for Diagnosis by Radar of Hurricane Structure  

Science Conference Proceedings (OSTI)

A Doppler radar technique is proposed for remote estimation of hurricane structure by sampling the kinematic properties of the hurricane wind field in a relatively small circular area outside the radius of maximum winds. This technique uses ...

Ralph J. Donaldson Jr.

1991-12-01T23:59:59.000Z

244

Satellite Remote Sensing by the Technique of Computed Tomography  

Science Conference Proceedings (OSTI)

Computed tomography is a medical diagnostic technique in which x-ray transmission measurements at numerous angles through the human body are processed by computer to produce cross-sectional pictures of the body. A modification of this technique, ...

Henry E. Fleming

1982-10-01T23:59:59.000Z

245

An Automated Radar Technique for the Identification of Tropical Precipitation  

Science Conference Proceedings (OSTI)

A radar-based automated technique for the identification of tropical precipitation was developed to improve quantitative precipitation estimation during extreme rainfall events. The technique uses vertical profiles of reflectivity to identify the ...

Xiaoyong Xu; Kenneth Howard; Jian Zhang

2008-10-01T23:59:59.000Z

246

A Simple Technique for Islanding Detection with Negligible Nondetection Zone  

E-Print Network (OSTI)

Although active islanding detection techniques have smaller nondetection zones than passive techniques, active methods could degrade the system power quality and are not as simple and easy to implement as passive methods. ...

Kirtley Jr, James L.

247

5.301 Chemistry Laboratory Techniques, January IAP 2004  

E-Print Network (OSTI)

This course is an intensive introduction to the techniques of experimental chemistry and gives first year students an opportunity to learn and master the basic chemistry lab techniques for carrying out experiments. Students ...

Tabacco, Sarah

2004-01-01T23:59:59.000Z

248

Cavitation descaling techniques for geothermal applications  

SciTech Connect

A simple and more efficient technique for descaling hard silica scales is urgently needed in order to exploit geothermal energy resources economically. With this objective in mind, DAEDALEAN ASSOCIATES, Incorporated is engaged in a research and development program utilizing the phenomenon of cavitation for cleaning and descaling under the sponsorship of ERDA, Division of Geothermal Research. The highlights of the research carried out so far under this program is reviewed in this presentation. Various effects of the phenomenon of cavitation erosion are presented. The intensity of cavitation erosion and its use in descaling applications are explained. The parameters governing the intensity of erosion are discussed. The overall objectives of the program are to demonstrate the engineering feasibility of utilizing cavitation and to generate engineering design data for its application in geothermal technology. The test facility used for this research consists of flow equipment, test chamber, and associated instrumentation. The performance of cavitating nozzles have been evaluated over a range of sizes. The intensity of erosion for one specific nozzle has been measured. The cleaning rates, the quality of cleaned surface and the intensity margin available so as not to damage the pipe wall have been determined for this specific design. Further work is under progress.

Thiruvengadam, Alagu P.

1976-01-01T23:59:59.000Z

249

Novel techniques applied to polymer lifetime predictions  

Science Conference Proceedings (OSTI)

A study aimed at testing the Arrhenius life prediction approach is described. After aging elastomeric materials at several elevated (accelerated) temperatures, a modulus profiling apparatus was used to demonstrate the complicated diffusion-limited oxidation anomalies are typically present under accelerated oven-aging conditions. By using surface modulus results (oxidation less to a monotonic increase in modulus), estimates are made of the true activation energy (E{sub a}) appropriate to the oxidation reactions dominating degradation. Even though macroscopic properties should be influenced by the diffusion-limited oxidation complications, ultimate tensile elongation results were found to be correlated to the true E{sub a}. This implies that cracks initiate at the hardened surface of the material and then quickly propagate through the less oxidized interior. If values of E{sub a} obtained from accelerated exposures can be determined and rationalized, another important question involves the Arrhenius assumption that E{sub a} remains constant in the extrapolation region. Preliminary data from two ultra-sensitive techniques (oxygen consumption and microcalorimetry) aimed at testing this fundamental assumption are described.

Gillen, K.T.; Wise, J.; Clough, R.L.

1993-12-31T23:59:59.000Z

250

Review of Building Energy Saving Techniques  

E-Print Network (OSTI)

The pace of building energy saving in our country is late, compared with developed countries, and the consumption of building energy is much higher. Therefore, it is imperative to open up new building energy saving techniques and heighten energy use efficiency. The approach of realizing energy savings is to exploit greatly and use reproducible new energy while trying to reduce total energy demand quantity in buildings. It can then reduce the utilization of energy that can easily lead to environmental pollution in building areas. Reducing total energy demand quantity in building mainly embarks from the following aspects: building programming and design, round safeguard structure, enhancing energy using efficiency of the end-User and heightening total energy using efficiency. The utilization of new energy plays an important role in the aspects of saving energy and protecting the environment. In contrast with the past, building energy savings put forward a higher requirement for building materials. Building materials play a very important role in building energy savings.

Zeng, X.; Zhu, D.

2006-01-01T23:59:59.000Z

251

Radar transponder apparatus and signal processing technique  

DOE Patents (OSTI)

An active, phase-coded, time-grating transponder and a synthetic-aperture radar (SAR) and signal processor means, in combination, allow the recognition and location of the transponder (tag) in the SAR image and allow communication of information messages from the transponder to the SAR. The SAR is an illuminating radar having special processing modifications in an image-formation processor to receive an echo from a remote transponder, after the transponder receives and retransmits the SAR illuminations, and to enhance tile transponder`s echo relative to surrounding ground clutter by recognizing special transponder modulations from phase-shifted from the transponder retransmissions. The remote radio-frequency tag also transmits information to the SAR through a single antenna that also serves to receive the SAR illuminations. Unique tag-modulation and SAR signal processing techniques, in combination, allow the detection and precise geographical location of the tag, through the reduction of interfering signals from ground clutter, and allow communication of environmental and status information from said tag to be communicated to said SAR.

Axline, R.M. Jr.; Sloan, G.R.; Spalding, R.E.

1994-12-31T23:59:59.000Z

252

An Examination of Failure Modes and Investigation Techniques in ...  

Science Conference Proceedings (OSTI)

Accident Investigation and Materials Failure Analysis at the Transportation Safety ... Experimental Technique to Conduct Thermal Shock Test on Refractories ...

253

A New Technique for Microautoradiography and Tritium Profiling  

SciTech Connect

A new technique has been developed for high magnification examination of autoradiographic emulsions. The technique enables a relatively quick examination of autoradiographic emulsions from large areas of metallographically prepared samples at magnifications of up to 50,000X. The technique also allows for profiling of the tritium distribution with the promise of quantitative profiling, all on a microscale.

Downs, G. L.

1967-12-01T23:59:59.000Z

254

Efficient Fingerprint Matching Technique Using Wavelet Based Features  

Science Conference Proceedings (OSTI)

This paper details the work of an efficient fingerprint matching technique via the use of wavelet based features. It is a kind of image based processing technique. So first core point is detected via using the hybrid technique. Then wavelet is applied ...

Nabeel Younus Khan; Muhammad Younus Javed

2007-12-01T23:59:59.000Z

255

Monitoring downhole pressures and flow rates critical for underbalanced drilling  

Science Conference Proceedings (OSTI)

True underbalanced drilling, and not just flow drilling, requires thorough engineering and monitoring of downhole pressures and flow rates to ensure the formations are drilled without formation damage. Underbalanced drilling involves intentionally manipulating the bottom hole circulating pressure so that it is less than static reservoir pressure. This underbalanced pressure condition allows reservoir fluids to enter the well bore while drilling continues, preventing fluid loss and many causes of formation damage. Applied correctly, this technology can address problems of formation damage, lost circulation, and poor penetration rates. Another important benefit of drilling underbalanced is the ability to investigate the reservoir in real time. The paper discusses the reasons for under balanced drilling, creating underbalance, well site engineering, fluids handling, rotating flow divertor injection gas, survey techniques, data acquisition, operations, maintaining under-balance, routine drilling, rate of penetration, misconceptions, and economics.

Butler, S.D.; Rashid, A.U.; Teichrob, R.R. [Flow Drilling Engineering Ltd., Calgary, Alberta (Canada)

1996-09-16T23:59:59.000Z

256

OBSERVATION OF DIPOLAR FERROMAGNETISM BY TEM TECHNIQUES.  

Science Conference Proceedings (OSTI)

Magnetostatic interactions play a central role in determining the magnetic response of an array of patterned magnetic elements or magnetized nanoparticles of given shape. The Fourier space approach recently introduced for the analytical computation of the demagnetizing tensor, field and energy for particles of arbitrary shape [1], has been recently extended to cover interactions between elements [2]. The main achievement has been the definition of a generalized dipole-dipole interaction for cylindrical objects, which takes into account the influence of shape anisotropy without resorting to,any kind of approximations [3]. Once the interaction energy is available, it becomes possible to evaluate the minimum energy state of the system for a given set of external parameters (such as applied field, aspect ratio, distance between elements). It turns out that, below a critical combination of aspect ratios and distances, the system undergoes a phase transition, changing abruptly from a closure domain state, with zero net magnetization, to a dipolar ferromagnetic state with a net magnetization which depends on the interaction strength between the elements. In order to observe this phenomenon by TEM, it is necessary to estimate the feasibility of the experiment by a series of simulations. Figure 1 shows the electron optical phase shifts for the system of three weakly (a-c) and strongly (d) interacting disks. The elements have a radius of 50 nm, a thickness of 5 nm (aspect ratio 1/20), and are uniformly magnetized at 2 T. By comparing Fig.1 (c) and (d), it can be seen that the fingerprint of the transition is the presence of fringing fields around the elements, revealed by the cosine fringes which resemble a dipole-like field in (d). When the system is in the closure-domain state, as in (a-c), no fringing field can be observed on a large scale. Figure 2 shows a set of Fresnel images, calculated for the same configurations as in Fig.1. As the Fresnel technique is scarcely sensitive to fringing fields, their effect is not evident in the images. However, by following the bright and dark contrast features in each image, a change in magnetization can be deduced, also when the electrostatic phase shift proportional to the thickness is taken into account. An alternative, more indirect, opportunity to observe the transition is granted by hysteresis loops. Figure 3 shows calculated hysteresis curves for non-interacting (a), weakly interacting (b) and strongly interacting (c) disks. The applied field is in-plane, along one of the triangular symmetry axis (0{sup o}, 60{sup o} or 120{sup o}). The transition is revealed by a remnant magnetization in zero field (c), contrary to the behavior of the weak interaction (b). Dipolar ferromagnetism can, therefore, be successfully investigated by TEM, where at least three different techniques, phase retrieval, phase contrast, and in-situ hysteresis experiments, are available for detecting the phase transition [4].

BELEGGIA, M.ZHU,Y.TANDON,S.ET AL.

2004-08-01T23:59:59.000Z

257

Novel techniques for slurry bubble column hydrodynamics  

Science Conference Proceedings (OSTI)

The objective of this cooperative research effort between Washington University, Ohio State University and Exxon Research Engineering Company was to improve the knowledge base for scale-up and operation of slurry bubble column reactors for syngas conversion and other coal conversion processes by increased reliance on experimentally verified hydrodynamic models. During the first year (July 1, 1995--June 30, 1996) of this three year program novel experimental tools (computer aided radioactive particle tracking (CARPT), particle image velocimetry (PIV), heat probe, optical fiber probe and gamma ray tomography) were developed and tuned for measurement of pertinent hydrodynamic quantities, such as velocity field, holdup distribution, heat transfer and bubble size. The accomplishments were delineated in the First Technical Annual Report. The second year (July, 1996--June 30, 1997) was spent on further development and tuning of the novel experimental tools (e.g., development of Monte Carlo calibration for CARPT, optical probe development), building up the hydrodynamic data base using these tools and comparison of the two techniques (PIV and CARPT) for determination of liquid velocities. A phenomenological model for gas and liquid backmixing was also developed. All accomplishments were summarized in the Second Annual Technical Report. During the third and final year of the program (July 1, 1997--June 30, 1998) and during the nine months no cost extension, the high pressure facility was completed and a set of data was taken at high pressure conditions. Both PIV, CT and CARPT were used. More fundamental hydrodynamic modeling was also undertaken and model predictions were compared to data. The accomplishments for this period are summarized in this report.

Dudukovic, M.P.

1999-05-14T23:59:59.000Z

258

CMB Observational Techniques and Recent Results  

E-Print Network (OSTI)

The Cosmic Microwave Background (CMB) consists of photons that were last created about 2 months after the Big Bang, and last scattered about 380,000 years after the Big Bang. The spectrum of the CMB is very close to a blackbody at 2.725 K and upper limits on any deviations of the CMB from a blackbody place strong constraints on energy transfer between the CMB and matter at all redshifts less than 2,000,000. The CMB is very nearly isotropic, but a dipole anisotropy of +/-3.346(17) mK shows that the Solar System barycenter is moving at 368+/-2 km/sec relative to the observable Universe. The dipole corresponds to a spherical harmonic index l=1. The higher indices l geq 2 indicate intrinsic inhomogeneities in the Universe that existed at the time of last scattering. While the photons have traveled freely only since the time of last scattering, the inhomogeneities traced by the CMB photons have been in place since the inflationary epoch only 10^{-35} sec after the Big Bang. These intrinsic anisotropies are much smaller in amplitude than the dipole anisotropy, with Delta T leq 100 microK. Electron scattering of the anisotropic radiation field produces an anisotropic linear polarization in the CMB with amplitudes less than 5 microK. Detailed studies of the angular power spectrum of the temperature and linear polarization anisotropies have yielded precise values for many cosmological parameters. This paper will discuss the techniques necessary to measure signals that are 100 million times smaller than the emission from the instrument and briefly describe results from experiments up to WMAP.

E. L. Wright

2003-12-31T23:59:59.000Z

259

ADVANCED TECHNIQUES FOR RESERVOIR SIMULATION AND MODELING OF NONCONVENTIONAL WELLS  

Science Conference Proceedings (OSTI)

Nonconventional wells, which include horizontal, deviated, multilateral and ''smart'' wells, offer great potential for the efficient management of oil and gas reservoirs. These wells are able to contact larger regions of the reservoir than conventional wells and can also be used to target isolated hydrocarbon accumulations. The use of nonconventional wells instrumented with downhole inflow control devices allows for even greater flexibility in production. Because nonconventional wells can be very expensive to drill, complete and instrument, it is important to be able to optimize their deployment, which requires the accurate prediction of their performance. However, predictions of nonconventional well performance are often inaccurate. This is likely due to inadequacies in some of the reservoir engineering and reservoir simulation tools used to model and optimize nonconventional well performance. A number of new issues arise in the modeling and optimization of nonconventional wells. For example, the optimal use of downhole inflow control devices has not been addressed for practical problems. In addition, the impact of geological and engineering uncertainty (e.g., valve reliability) has not been previously considered. In order to model and optimize nonconventional wells in different settings, it is essential that the tools be implemented into a general reservoir simulator. This simulator must be sufficiently general and robust and must in addition be linked to a sophisticated well model. Our research under this five year project addressed all of the key areas indicated above. The overall project was divided into three main categories: (1) advanced reservoir simulation techniques for modeling nonconventional wells; (2) improved techniques for computing well productivity (for use in reservoir engineering calculations) and for coupling the well to the simulator (which includes the accurate calculation of well index and the modeling of multiphase flow in the wellbore); and (3) accurate approaches to account for the effects of reservoir heterogeneity and for the optimization of nonconventional well deployment. An overview of our progress in each of these main areas is as follows. A general purpose object-oriented research simulator (GPRS) was developed under this project. The GPRS code is managed using modern software management techniques and has been deployed to many companies and research institutions. The simulator includes general black-oil and compositional modeling modules. The formulation is general in that it allows for the selection of a wide variety of primary and secondary variables and accommodates varying degrees of solution implicitness. Specifically, we developed and implemented an IMPSAT procedure (implicit in pressure and saturation, explicit in all other variables) for compositional modeling as well as an adaptive implicit procedure. Both of these capabilities allow for efficiency gains through selective implicitness. The code treats cell connections through a general connection list, which allows it to accommodate both structured and unstructured grids. The GPRS code was written to be easily extendable so new modeling techniques can be readily incorporated. Along these lines, we developed a new dual porosity module compatible with the GPRS framework, as well as a new discrete fracture model applicable for fractured or faulted reservoirs. Both of these methods display substantial advantages over previous implementations. Further, we assessed the performance of different preconditioners in an attempt to improve the efficiency of the linear solver. As a result of this investigation, substantial improvements in solver performance were achieved.

Louis J. Durlofsky; Khalid Aziz

2004-08-20T23:59:59.000Z

260

Workshop on magma/hydrothermal drilling and instrumentation  

DOE Green Energy (OSTI)

The discussions, conclusions, and recommendations of the Magma/Hydrothermal Drilling and Instrumentation Workshop, Albuquerque, NM, May 31--June 2, 1978 are summarized. Three working groups were organized as follows: Drilling Location and Environment, Drilling and Completion Technology, and Logging and Instrumentation Technology. The first group discussed potential drilling sites and the environment that could be expected in drilling to magma depth at each site. Sites suggested for early detailed evaluation as candidate drilling sites were The Geysers-Clear Lake, CA, Kilauea, HI, Long Valley-Mono Craters, CA, and Yellowstone, WY. Magma at these sites is expected to range from 3 to 10 km deep with temperatures of 800 to 1100{sup 0}C. Detailed discussions of the characteristics of each site are given. In addition, a list of geophysical measurements desired for the hole is presented. The Drilling and Completion Group discussed limitations on current rotary drilling technology as a function of depth and temperature. The group concluded that present drilling systems can be routinely used to temperatures of 200{sup 0}C and depths to 10 km; drilling to 350{sup 0}C can be accomplished with modifications of present techniques, drilling at temperatures from 350{sup 0}C to 1100{sup 0}C will require the development of new drilling techniques. A summary of the limiting factors in drilling systems is presented, and recommendations for a program directed at correcting these limitations is described. The third group discussed requirements for instrumentation and established priorities for the development of the required instruments. Of highest priority for development were high resolution temperature tools, sampling techniques (core, formation fluids), chemical probes, and communications techniques. A description of instrumentation requirements for the postulated hole is given, and the tasks necessary to develop the required devices are delineated.

Varnado, S.G.; Colp, J.L. (eds.)

1978-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "techniques drilling techniques" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Pros, cons of techniques used to calculate oil, gas finding costs  

SciTech Connect

A major problem facing the U.S. petroleum industry is the higher average finding costs that now exist within the U.S. compared with the average finding costs outside the U.S. It has been argued that federal lands and offshore areas need to be open for drilling in order to reduce average finding costs in the U.S. This article analyzes the strengths and weaknesses of conventional techniques for determining finding costs. Our goal is a finding costs measure that is a reliable indicator of future profitability.

Gaddis, D.; Brock, H.; Boynton, C. (Inst. of Petroleum Accounting, Denton, TX (US))

1992-06-01T23:59:59.000Z

262

The Role of Isotopes in Monitoring Water Quality Impacts Associated with Shale Gas Drilling  

E-Print Network (OSTI)

The Role of Isotopes in Monitoring Water Quality Impacts Associated with Shale Gas Drilling Methane, including shale gas drilling. Monitoring techniques exist for detecting methane and, in some cases detail within the context of shale gas drilling activities in New York, as well as their uses

Wang, Z. Jane

263

TRIDENT flyer plate Impact technique: comparison to gas gun plate impact technique  

SciTech Connect

This report describes the details of a series of plate impact experiments that were conducted on a gas gun in an effort to validate a new technique for plate impact using the TRIDENT laser to launch thin flyers. The diagnostics fielded were VISAR and identical samples and impactors were used on both platforms. All experimenters agree that the VISAR results should have agreed between the two experimental platforms. The VISAR results did not agree across the platforms and experimenters offer explanations and implications for this outcome.

Darcie D. Koller; George T. Gray III; Sheng-Nian Luo

2009-03-01T23:59:59.000Z

264

State-of-the-art in coalbed methane drilling fluids  

SciTech Connect

The production of methane from wet coalbeds is often associated with the production of significant amounts of water. While producing water is necessary to desorb the methane from the coal, the damage from the drilling fluids used is difficult to assess, because the gas production follows weeks to months after the well is drilled. Commonly asked questions include the following: What are the important parameters for drilling an organic reservoir rock that is both the source and the trap for the methane? Has the drilling fluid affected the gas production? Are the cleats plugged? Does the 'filtercake' have an impact on the flow of water and gas? Are stimulation techniques compatible with the drilling fluids used? This paper describes the development of a unique drilling fluid to drill coalbed methane wells with a special emphasis on horizontal applications. The fluid design incorporates products to match the delicate surface chemistry on the coal, a matting system to provide both borehole stability and minimize fluid losses to the cleats, and a breaker method of removing the matting system once drilling is completed. This paper also discusses how coal geology impacts drilling planning, drilling practices, the choice of drilling fluid, and completion/stimulation techniques for Upper Cretaceous Mannville-type coals drilled within the Western Canadian Sedimentary Basin. A focus on horizontal coalbed methane (CBM) wells is presented. Field results from three horizontal wells are discussed, two of which were drilled with the new drilling fluid system. The wells demonstrated exceptional stability in coal for lengths to 1000 m, controlled drilling rates and ease of running slotted liners. Methods for, and results of, placing the breaker in the horizontal wells are covered in depth.

Baltoiu, L.V.; Warren, B.K.; Natras, T.A.

2008-09-15T23:59:59.000Z

265

Optical techniques for fluid flow and heat transfer  

Science Conference Proceedings (OSTI)

A review is presented of optical measuring techniques employed in momentum heat and mass transfer studies. A classification is given of those techniques that are nowadays widely employed in studies to advance the understanding of transport phenomena in fluids. Techniques that employ effects caused by fluid molecules are briefly treated, and examples of measurements are given to demonstrate the kind of information that can be obtained by these techniques. Optical techniques using tracers to obtain transport information are summarized, and laser-Doppler anemometry and its application to fluid flow studies are emphasized. Applications of this technique in single-phase and two-phase flows are given that demonstrate its potential in experimental fluid mechanics and convective heat transfer studies. 63 refs.

Durst, F. (Erlangen-Nuernberg Universitaet, Erlangen (Germany, F.R.))

1990-01-01T23:59:59.000Z

266

PFT Air Infiltration Measurement Technique | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

PFT Air Infiltration Measurement Technique PFT Air Infiltration Measurement Technique PFT Air Infiltration Measurement Technique April 2, 2012 - 3:11pm Addthis The Brookhaven National Laboratory developed the PFT (PerFluorocarbon tracer gas) technique to measure changes over time when determining a building's air-infiltration rate. The Brookhaven National Laboratory developed the PFT (PerFluorocarbon tracer gas) technique to measure changes over time when determining a building's air-infiltration rate. What does this mean for me? You can save 5%-30% on your energy bill by making upgrades following a home energy assessment. A professional energy auditor may use the PFT air infiltration measurement technique to find out where your home has air leaks, though a blower door test is more commonly used.

267

X-ray streak and framing camera techniques  

SciTech Connect

This paper reviews recent developments and applications of ultrafast diagnostic techniques for x-ray measurements. These techniques, based on applications of image converter devices, are already capable of significantly important resolution capabilities. Techniques capable of time resolution in the sub-nanosecond regime are being considered. Mechanical cameras are excluded from considerations as are devices using phosphors or fluors as x-ray converters.

Coleman, L.W.; Attwood, D.T.

1975-12-23T23:59:59.000Z

268

Ultrasonic technique for inspection of GPHS capsule girth weld integrity  

DOE Green Energy (OSTI)

An innovative nondestructive examination (NDE) technique for the inspection of integrity of General Purpose Heat Source (GPHS) capsule girth welds (Figure 1) was developed employing a Lamb (plate) wave as the mode of the sound propagation. Reliability of the Lamb wave technique was tested on GPHS capsules using plutonium pallet simulators. All ten capsules, which were previously rejected, passed ultrasonic (UT) inspection using the Lamb wave technique.

Placr, Arnost

1993-05-01T23:59:59.000Z

269

Evaluating Permeability Enchancement Using Electrical Techniques  

DOE Green Energy (OSTI)

Enhanced Geothermal Systems (EGS) development projects involve the artificial stimulation of relatively impermeable high-temperature underground regions (at depths of 2-4 kilometers or more) to create sufficient permeability to permit underground fluid circulation, so that hot water can be withdrawn from production wells and used to generate electric power. Several major research projects of this general type have been undertaken in the past in New Mexico (Fenton Hill), Europe, Japan and Australia. Recent U.S. activities along these lines focus mainly on stimulating peripheral areas of existing operating hydrothermal fields rather than on fresh 'greenfield' sites, but the long-term objective of the Department of Energy's EGS program is the development of large-scale power projects based on EGS technology (MIT, 2006; NREL, 2008). Usually, stimulation is accomplished by injecting water into a well at high pressure, enhancing permeability by the creation and propagation of fractures in the surrounding rock (a process known as 'hydrofracturing'). Beyond just a motivation, low initial system permeability is also an essential prerequisite to hydrofracturing. If the formation permeability is too high, excessive fluid losses will preclude the buildup of sufficient pressure to fracture rock. In practical situations, the actual result of injection is frequently to re-open pre-existing hydrothermally-mineralized fractures, rather than to create completely new fractures by rupturing intact rock. Pre-existing fractures can often be opened using injection pressures in the range 5-20 MPa. Creation of completely new fractures will usually require pressures that are several times higher. It is preferable to undertake development projects of this type in regions where tectonic conditions are conducive to shear failure, so that when pre-existing fractures are pressurized they will fail by shearing laterally. If this happens, the fracture will often stay open afterwards even if injection subsequently ceases. The principal barrier to EGS utilization for electricity generation is project economics. Costs for geothermal electricity obtained from conventional hydrothermal systems are just marginally competitive. Unless and until the costs of routinely and reliably creating and exploiting artificial subterranean fracture networks that can deliver useful quantities of hot fluid to production wells for long periods of time (years) are reduced to levels comparable to those of a conventional geothermal development project, EGS will be of little interest to the electrical power industry. A significant obstacle to progress in projects of this general type is the difficulty of appraising the properties (geometry, fluid transmissivity, etc.) of the fracture(s) created/re-opened by injection. Sustainability of power production is critically dependent upon reservoir thermal sweep efficiency, which depends in turn on the geometry of the fracture network and its interconnections with the various production and injection wells used to circulate fluid underground. If no permeable connections are created between the wells, fluid flow will be too slow for practical utility. If the connections are too good, however (such as a production/injection well pair connected by a single very permeable fracture), production wellhead temperatures will decline rapidly. Unless the permeable fractures created by hydrofracturing can be accurately mapped, the cost of subsequent trial-and-error drilling to try to establish a suitable fluid circulation system is likely to dominate project economics and render EGS impractical.

John W. Pritchett

2008-09-01T23:59:59.000Z

270

Shallow horizontal drilling in unconsolidated sands offshore California  

SciTech Connect

Four shallow horizontal wells were drilled from Platform C in Dos Cuadras field offshore California to recover reserves inaccessible with conventional drilling techniques. The wells had true vertical depths (TVD's) ranging from 746 to 989 ft with total horizontal displacements from 1,613 to 3,788 ft. The wells had horizontal displacement TVD ratios up to 3.95. The targets were unconsolidated, high-permeability sands. This paper details well planning, drilling, and completion.

Payne, J.D.; Bunyak, M.J. (Unocal Corp., Los Angeles, CA (United States)); Huston, C.W. (Smith International Inc., Tyler, TX (United States))

1993-12-01T23:59:59.000Z

271

Qualification of a computer program for drill string dynamics  

DOE Green Energy (OSTI)

A four point plan for the qualification of the GEODYN drill string dynamics computer program is described. The qualification plan investigates both modal response and transient response of a short drill string subjected to simulated cutting loads applied through a polycrystalline diamond compact (PDC) bit. The experimentally based qualification shows that the analytical techniques included in Phase 1 GEODYN correctly simulate the dynamic response of the bit-drill string system. 6 refs., 8 figs.

Stone, C.M.; Carne, T.G.; Caskey, B.C.

1985-01-01T23:59:59.000Z

272

Argonne National Laboratory Scientists Invent Breakthrough Technique in  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Argonne National Laboratory Scientists Invent Breakthrough Argonne National Laboratory Scientists Invent Breakthrough Technique in Nanotechnology Argonne National Laboratory Scientists Invent Breakthrough Technique in Nanotechnology March 17, 2011 - 9:36am Addthis Gold and carbon nanoparticles strung together using a breakthrough new technique for materials design known as "optically directed assembly" | Courtesy of Argonne National Laboratory Gold and carbon nanoparticles strung together using a breakthrough new technique for materials design known as "optically directed assembly" | Courtesy of Argonne National Laboratory Elizabeth Meckes Elizabeth Meckes Director of User Experience & Digital Technologies, Office of Public Affairs What are the key facts? With a low-power laser, similar in intensity to those in

273

GreenArrow© - A New Graph Labeling Technique - Available ...  

Search PNNL. PNNL Home; About; Research; Publications; Jobs; News; Contacts; GreenArrow© - A New Graph Labeling Technique. Battelle Number(s): ...

274

Exploration and Development Techniques for Basin and Range Geothermal...  

Open Energy Info (EERE)

Council, 2002 DOI Not Provided Check for DOI availability: http:crossref.org Online Internet link for Exploration and Development Techniques for Basin and Range Geothermal...

275

Optimization Techniques for the Brazilian Natural Gas Network ...  

E-Print Network (OSTI)

Jun 4, 2013 ... Optimization Techniques for the Brazilian Natural Gas Network Planning Problem . Leonardo A.M. Moraes(leonardo.moraes ***at*** ...

276

Novel update techniques for the revised simplex method  

E-Print Network (OSTI)

Jan 28, 2013 ... high performance computing techniques for the simplex method [13,17]. Qi Huangfu · J. A. Julian Hall. School of Mathematics, University of ...

277

Thin film techniques for solid oxide fuel cells  

Thin film techniques for solid oxide fuel cells V.E.J. van Dieten and J. Schoonman Laboratory ... ticles stay in the hot temperature region can be ...

278

The three dimensional X-ray diffraction technique  

SciTech Connect

This introductory tutorial describes the so called 3 dimensional X-ray diffraction (3DXRD) technique, which allows bulk non-destructive structural characterizations of crystalline materials. The motivations and history behind the development of this technique are described and its potentials are sketched. Examples of the use of the technique are given and future trends and developments are suggested. The primary aim of the paper is to give 3DXRD novices an easy introduction to the technique and to describe a way from a dream to reality and new results.

Jensen, D. Juul; Poulsen, H.F. (Denmark)

2012-10-24T23:59:59.000Z

279

USE OF ADVANCED DATA PROCESSING TECHNIQUES IN THE IMAGING OF...  

Open Energy Info (EERE)

USE OF ADVANCED DATA PROCESSING TECHNIQUES IN THE IMAGING OF THE COSO GEOTHERMAL FIELD Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: USE OF...

280

New Quantum Dot Technique Combines Best of Optical and ...  

Science Conference Proceedings (OSTI)

New Quantum Dot Technique Combines Best of Optical and Electron ... over a sample that has been coated with specially engineered quantum dots. ...

2013-06-25T23:59:59.000Z

Note: This page contains sample records for the topic "techniques drilling techniques" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Electric Vehicle Battery Thermal Issues and Thermal Management Techniques (Presentation)  

SciTech Connect

This presentation examines the issues concerning thermal management in electric drive vehicles and management techniques for improving the life of a Li-ion battery in an EDV.

Rugh, J. P.; Pesaran, A.; Smith, K.

2013-07-01T23:59:59.000Z

282

High Througput Combinatorial Techniques in Hydrogen Storage Materials...  

NLE Websites -- All DOE Office Websites (Extended Search)

THROUGHPUTCOMBINATORIAL TECHNIQUES IN HYDROGEN STORAGE MATERIALS R&D WORKSHOP U.S. Department of Energy Office of Hydrogen, Fuel Cells and Infrastructure Technologies June 26,...

283

Simulation Techniques for Process Energy Modeling - Doing it ...  

Science Conference Proceedings (OSTI)

Simulation Techniques for Process Energy Modeling ... 2: Constrained Material Balance for Maximum Activity of Carbon; SuperSolver's Optimization Feature. III.

284

J-44: Fast Triangular Gate Pulse Measurement Techniques for ...  

Science Conference Proceedings (OSTI)

Conventional I-V measurement techniques, which may give undesirable stress ... Improved Performance of Bulk-Heterojunction Organic Solar Cells with the Use ...

285

Fabrication of Solid Oxide Fuel Cells via Thin Film Techniques  

Science Conference Proceedings (OSTI)

We decided to use thin film techniques to solve this problem. Among various methods of lowering the operation temperature for SOFCs, adopting bi-layer ...

286

Advanced Millimeter-Wave Security Portal Imaging Techniques  

Science Conference Proceedings (OSTI)

Millimeter-wave imaging is rapidly gaining acceptance for passenger screening at airports and other secured facilities. This paper details a number of techniques developed over the last several years including novel image reconstruction and display techniques, polarimetric imaging techniques, array switching schemes, as well as high frequency high bandwidth techniques. Implementation of some of these methods will increase the cost and complexity of the mm-wave security portal imaging systems. RF photonic methods may provide new solutions to the design and development of the sequentially switched linear mm-wave arrays that are the key element in the mm-wave portal imaging systems.

Sheen, David M.; Bernacki, Bruce E.; McMakin, Douglas L.

2012-04-01T23:59:59.000Z

287

Analysis of Traffic Scheduling Technique for Smart Grid Mesh ...  

Science Conference Proceedings (OSTI)

Analysis of Traffic Scheduling Technique for Smart Grid Mesh Networks ... In this paper, we present a multi-gate mesh network architecture that has ...

2012-01-03T23:59:59.000Z

288

Field results document underbalanced drilling success  

Science Conference Proceedings (OSTI)

Many different techniques are used to maintain underbalanced conditions at the toolface. Whether the operator is trying to avoid drilling problems or prevent formation damage, the key to a safe, successful operation is a reliable method of sealing around the tubulars at the surface for continuous well control. Globally, underbalanced drilling (UBD) is emerging as an important technology to improve production and solve drilling problems with success in many applications with different reservoirs. Improvements in initial flow rates using UBD are being supported by longer term production. UBD techniques and processes are improving through experience and implementation. UBD is becoming a more economical means to optimize reservoir management than conventional overbalanced operations. UBD operations are proving to be safer than conventional overbalanced drilling.

Vozniak, J.; Cuthbertson, R.L.

1997-04-01T23:59:59.000Z

289

GRAIN-SCALE FAILURE IN THERMAL SPALLATION DRILLING  

DOE Green Energy (OSTI)

Geothermal power promises clean, renewable, reliable and potentially widely-available energy, but is limited by high initial capital costs. New drilling technologies are required to make geothermal power financially competitive with other energy sources. One potential solution is offered by Thermal Spallation Drilling (TSD) - a novel drilling technique in which small particles (spalls) are released from the rock surface by rapid heating. While TSD has the potential to improve drilling rates of brittle granitic rocks, the coupled thermomechanical processes involved in TSD are poorly described, making system control and optimization difficult for this drilling technology. In this paper, we discuss results from a new modeling effort investigating thermal spallation drilling. In particular, we describe an explicit model that simulates the grain-scale mechanics of thermal spallation and use this model to examine existing theories concerning spalling mechanisms. We will report how borehole conditions influence spall production, and discuss implications for macro-scale models of drilling systems.

Walsh, S C; Lomov, I; Roberts, J J

2012-01-19T23:59:59.000Z

290

Horizontal flow drilling requires focus on well control  

Science Conference Proceedings (OSTI)

Horizontal wells drilled underbalanced or while flowing must have surface equipment and a blow-out preventer stack specially designed for circulating operations. Functional well control methods for drilling horizontal wells have been developed in specific regions worldwide. Special safety equipment and procedures, however, are still required in most horizontal development applications. The challenge for horizontal drilling development and underbalanced drilling is to overcome the obstacles of government regulation, reduce pollution dangers, and improve personnel and equipment safety. Well control techniques tailored to the demands of each field can help overcome these challenges. Several well control elements must be addressed carefully on each horizontal well: drilling fluid requirements, well control procedures and equipment, and surface equipment and special considerations for handling hydrocarbons produced while drilling. The paper discusses each of these elements for underbalanced horizontal drilling.

Tangedahl, M.J. (RBOP Oil Tools International Inc., Houston, TX (United States))

1994-06-13T23:59:59.000Z

291

Formation damage in underbalanced drilling operations  

E-Print Network (OSTI)

Formation damage has long been recognized as a potential source of reduced productivity and injectivity in both horizontal and vertical wells. From the moment that the pay zone is being drilled until the well is put on production, a formation is exposed to a series of fluids and operations that can reduce its productive capacity. Any process that causes a loss in the productivity of an oil-, gas-, or water-saturated formation has a damaging effect on the reservoir. These damage mechanisms predominantly fall into three major classifications: mechanical, chemical, and biological. Underbalanced drilling operations involve drilling a portion of the wellbore at fluid pressures less than that of the target formation. This technology has been used to prevent or minimize problems associated with invasive formation damage, which often greatly reduces the productivity of oil and gas reservoirs, mainly in openhole horizontal-well applications. Underbalanced drilling is not a solution for all formation-damage problems. Damage caused by poorly designed and/or executed underbalanced drilling programs can equal or exceed that which may occur with a well-designed conventional overbalanced drilling program. Four techniques are currently available to achieve underbalanced conditions while drilling. These include using lightweight drilling fluids, injecting gas down the drillpipe, injecting gas into a parasite string, and using foam. This study provides an analysis of a number of potential damage mechanisms present when drilling underbalanced. It describes each one and its influence on the productivity of a well. Additionally it presents a general description of the different techniques that can be applied to carry out successful, cost-effective UBD operations, and discusses how these techniques may be used to reduce or eliminate formation damage.

Reyes Serpa, Carlos Alberto

2003-01-01T23:59:59.000Z

292

Wavelet denoising techniques with applications to experimental geophysical data  

Science Conference Proceedings (OSTI)

In this paper, we compare Fourier-based and wavelet-based denoising techniques applied to both synthetic and real experimental geophysical data. The Fourier-based technique used for comparison is the classical Wiener estimator, and the wavelet-based ... Keywords: Denoising, Empirical Bayes, Wavelet, Wavelet thresholding, Wiener filter

Albert C. To; Jeffrey R. Moore; Steven D. Glaser

2009-02-01T23:59:59.000Z

293

A noise rejection deadbeat control technique for active power filter  

Science Conference Proceedings (OSTI)

Compared with power filter, active power filter has a lot of advantages and it is an efficient technique to eliminate or limit the harmonic pollution in power system. However, the control of active power filter is very complex, and the control of current ... Keywords: active power filter, current control technique, deadbeat control, noise rejection, periodic noise, resetting integrator, sampling noise

Li-Dan Zhou; Mansoor Mansoor; Qian Ai; Da Xie; Chen Chen

2005-10-01T23:59:59.000Z

294

Hybrid TOA---AOA Location Positioning Techniques in GSM Networks  

Science Conference Proceedings (OSTI)

Positioning algorithms and their implementation in mobile networks are being investigated in the literature due to their importance in location services. Nowadays, the need for superior accuracy has cast attention to hybrid positioning techniques. In ... Keywords: Access delay, Angle of arrivals, GSM procedure, Hybrid techniques, Paging signalling, Time of arrivals

Nikos Deligiannis; Spiros Louvros

2010-07-01T23:59:59.000Z

295

Software and Hardware Techniques for SEU Detection in IP Processors  

Science Conference Proceedings (OSTI)

In the recent years both software and hardware techniques have been adopted to carry out reliable designs, aimed at autonomously detecting the occurrence of faults, to allow discarding erroneous data and possibly performing the recovery of the system. ... Keywords: Fault injection, Hardware/software techniques, Reliability, Single-event upset faults

C. Bolchini; A. Miele; M. Rebaudengo; F. Salice; D. Sciuto; L. Sterpone; M. Violante

2008-06-01T23:59:59.000Z

296

Layout impact of resolution enhancement techniques: impediment or opportunity?  

Science Conference Proceedings (OSTI)

This tutorial introduces the reader to the basic concepts of optical lithography, derives fundamental resolution limits, reviews the challenges facing future technology nodes, explains the principles of resolution enhancement techniques and their impact ... Keywords: design for manufacturability, lithography, radically restricted designs, resolution enhancement techniques

Lars W. Liebmann

2003-04-01T23:59:59.000Z

297

Hard X-ray Phase Contrast -Techniques and Applications -  

E-Print Network (OSTI)

Hard X-ray Phase Contrast Microscopy - Techniques and Applications - A Dissertation Presented of the Graduate School ii #12;Abstract of the Dissertation Hard X-ray Phase Contrast Microscopy - Techniques . . . . . . . . . . . . . . . . . . 58 3.2.4 Reconstruction Example for Integration Method . . . . 59 3.2.5 The Imaginary Part

298

X-ray divergent-beam (Kossel) technique: A review  

Science Conference Proceedings (OSTI)

The development of the X-ray divergent-beam (Kossel) technique over the last 50 years is traced. The fundamentals of this technique and ways to implement it experimentally are considered, and its potential for studying the real structure of crystals is analyzed in detail.

Lider, V. V., E-mail: lider@ns.crys.ras.ru [Russian Academy of Sciences, Shubnikov Institute of Crystallography (Russian Federation)

2011-03-15T23:59:59.000Z

299

A review of vessel extraction techniques and algorithms  

Science Conference Proceedings (OSTI)

Vessel segmentation algorithms are the critical components of circulatory blood vessel analysis systems. We present a survey of vessel extraction techniques and algorithms. We put the various vessel extraction approaches and techniques in perspective ... Keywords: Magnetic resonance angiography, X-ray angiography, medical imaging, neurovascular, vessel extraction

Cemil Kirbas; Francis Quek

2004-06-01T23:59:59.000Z

300

Assessment of speciation techniques including the application of photoacoustic spectroscopy  

Science Conference Proceedings (OSTI)

This document describes laboratory experiments that compare chromatographic and spectroscopic methods for rapidly characterizing ionic species in detail. These techniques were tested on various radioactive ion systems to develop a rapid, accurate approach to site characterization for use with Remedial Action Programs. Promising techniques were evaluated. 9 refs., 16 figs., 2 tabs.

Bucher, J.; Gehmecker, H.; Edelstein, N.

1985-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "techniques drilling techniques" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Earth resistivity estimation based on satellite imaging techniques  

Science Conference Proceedings (OSTI)

This paper proposes a useful technique for generating an earth resistivity map. Earth resistance is one of essential factors in a broad range of power system analysis and design. Information of earth resistivity is helpful for practical power system ... Keywords: Wenner method, classification technique, earth resistivity, multispectral, power system grounding, satellite image technology

Kwanchai Norsangsri; Thanatchai Kulworawanichpong

2009-09-01T23:59:59.000Z

302

Hierarchical Partitioning Techniques for Structured Adaptive Mesh Refinement Applications  

Science Conference Proceedings (OSTI)

This paper presents the design and preliminary evaluation of hierarchical partitioning and load-balancing techniques for distributed structured adaptive mesh refinement (SAMR) applications. The overall goal of these techniques is to enable the load distribution ... Keywords: distributed computing, dynamic load balancing, hierarchical partitioning algorithm, structured adaptive mesh refinement

Xiaolin Li; Manish Parashar

2004-06-01T23:59:59.000Z

303

Nonlinear Control Techniques in Uninterruptible Power Supply Inverter: A Review  

Science Conference Proceedings (OSTI)

Summarizes the basic objectives of controllers for UPS system are tracking ability and robustness. To get this aims, many controllers have been proposed in the literature. In this paper a comprehensive review of the nonlinear control techniques of UPS ... Keywords: inverter, uninterruptible power supply, control techniques

Ghazanfar Shahgholian; Jawad Faiz; Pegah Shafaghi

2009-12-01T23:59:59.000Z

304

A Characterization of Distribution Techniques for Dynamic Adaptive Grid Hierarchies  

E-Print Network (OSTI)

A Characterization of Distribution Techniques for Dynamic Adaptive Grid Hierarchies Samip Bhavsar for distributed adaptive grid hierarchies that underlie parallel adaptive mesh-refinement (AMR) techniques is the development of a policy driven tool for automated configuration and run-time management of distributed

Parashar, Manish

305

Review on Ventilation Rate Measuring and Modeling Techniques in Naturally  

NLE Websites -- All DOE Office Websites (Extended Search)

Review on Ventilation Rate Measuring and Modeling Techniques in Naturally Review on Ventilation Rate Measuring and Modeling Techniques in Naturally Ventilated Building Speaker(s): Sezin Eren Ozcan Date: May 16, 2006 - 12:00pm Location: Bldg. 90 Due to limited energy sources, countries are looking for alternative solutions to decrease energy needs. In that context, natural ventilation can be seen as a very attractive sustainable technique in building design. However, understanding of ventilation dynamics is needed to provide an efficient control. Ventilation rate has to be determined not only in terms of energy, but also for controlling indoor air quality and emissions. For these reasons, agricultural buildings (livestock houses, greenhouses, etc.), naturally ventilated industrial buildings, and residences require a reliable ventilation rate measuring technique. Measuring techniques suffer

306

Identification of Fissionable Materials Using the Tagged Neutron Technique  

Science Conference Proceedings (OSTI)

This summary describes experiments to detect and identify fissionable materials using the tagged neutron technique. The objective of this work is to enhance homeland security capability to find fissionable material that may be smuggled inside shipping boxes, containers, or vehicles. The technique distinguishes depleted uranium from lead, steel, and tungsten. Future work involves optimizing the technique to increase the count rate by many orders of magnitude and to build in the additional capability to image hidden fissionable materials. The tagged neutron approach is very different to other techniques based on neutron die-away or photo-fission. This work builds on the development of the Associated Particle Imaging (API) technique at the Special Technologies Laboratory (STL) [1]. Similar investigations have been performed by teams at the Oak Ridge National Laboratory (ORNL), the Khlopin Radium Institute in Russia, and by the EURITRACK collaboration in the European Union [2,3,4].

R.P. Keegan, J.P. Hurley, J.R. Tinsley, R. Trainham

2009-06-30T23:59:59.000Z

307

Development of the Passive Cooling Technique in China  

E-Print Network (OSTI)

With more and more energy and environmental issues, the energy-saving and sustainable development of buildings is of utmost concern to the building industry. Passive cooling techniques can optimally utilize natural resources in order to reduce the energy consumption of buildings. At the same time, it can improve the buildings' thermal environment, so that it has gained the attention of many researchers and has been applied in many different zones of China. The author summarizes various passive cooling techniques, analyzes the research methods and simulation tools, and presents the results of a survey on actual applied conditions. We put forward the pivotal factors and the development direction of the technique. Comparing the thermal comfort zone of the passive cooling technique and the mechanical types, the passive cooling technique is found to be more suitable to people.

Zhou, J.; Wu, J.; Zhang, G.; Xu, Y.

2006-01-01T23:59:59.000Z

308

Recombination Lifetimes Using the RCPCD Technique: Comparison with Other Methods  

DOE Green Energy (OSTI)

The theory and operation of the resonance-coupled photoconductive decay (RCPCD) technique is described. Examples are presented of data measured on a wide variety of sample types. The RCPCD technique has been applied to a variety of wafer and thin-film materials. Using this technique, we can measure recombination lifetime over at least three decades of injection level. We can also measure relative values of minority-carrier mobility and diffusion length. By scanning the excitation wavelength, we can measure spectral response and photoconductive excitation spectra. Deep-level impurities have been detected by several variations of RCPCD.

Ahrenkiel, R.K.; Johnston, S.W.; Dashdorj, J.

2005-01-01T23:59:59.000Z

309

Graphical technique for interpolating shape factors for peripheral waterflood systems  

SciTech Connect

A method of interpolating the shape factors between already known sets of data can be utilized in peripheral waterflood systems. This graphical technique should provide reasonably reliable shape factors without necessitating further flow pattern evaluation. A set of interpolated shape factors for the constant pressure difference case is tabulated. These factors were derived from the shape factors previously determined using variation of width technique. A comparison of the interpolated shape factors and the shape factors obtained by the circling-in techniques are also shown. Good agreement was obtained in this comparison.

Kantar, K.; Helander, D.P.

1967-06-01T23:59:59.000Z

310

Neutron Imaging Explored as Complementary Technique for Improving Cancer  

NLE Websites -- All DOE Office Websites (Extended Search)

Neutron Imaging Explored as Complementary Technique for Improving Cancer Neutron Imaging Explored as Complementary Technique for Improving Cancer Detection August 05, 2013 Researcher Maria Cekanova analyzes the neutron radiographs of a canine breast tumor (black color in top image of monitor screen) using the software to visualize in color the various intensities of neutron transmissions through the breast tissue. ORNL and University of Tennessee collaboration now analyzing first results from neutron radiographs of cancerous tissue samples Today's range of techniques for detection of breast and other cancers include mammography, computed tomography (CT), magnetic resonance imaging (MRI), ultrasound, positron emission tomography (PET), and optical imaging. Each technology has advantages and disadvantages, with limitations either

311

Rapid analysis of steels using laser-based techniques  

SciTech Connect

Based on the data obtained by this study, we conclude that laser-based techniques can be used to provide at least semi-quantitative information about the elemental composition of molten steel. Of the two techniques investigated here, the Sample-Only method appears preferable to the LIBS (laser-induced breakdown spectroscopy) method because of its superior analytical performance. In addition, the Sample-Only method would probably be easier to incorporate into a steel plant environment. However, before either technique can be applied to steel monitoring, additional research is needed.

Cremers, D.A.; Archuleta, F.L.; Dilworth, H.C.

1985-01-01T23:59:59.000Z

312

Mapping Diffuse Seismicity Using Empirical Matched Field Processing Techniques  

DOE Green Energy (OSTI)

The objective of this project is to detect and locate more microearthquakes using the empirical matched field processing (MFP) method than can be detected using only conventional earthquake detection techniques. We propose that empirical MFP can complement existing catalogs and techniques. We test our method on continuous seismic data collected at the Salton Sea Geothermal Field during November 2009 and January 2010. In the Southern California Earthquake Data Center (SCEDC) earthquake catalog, 619 events were identified in our study area during this time frame and our MFP technique identified 1094 events. Therefore, we believe that the empirical MFP method combined with conventional methods significantly improves the network detection ability in an efficient matter.

Wang, J; Templeton, D C; Harris, D B

2011-01-21T23:59:59.000Z

313

Rapid Characterization of Drill Core and Cutting Mineralogy using Infrared  

Open Energy Info (EERE)

Rapid Characterization of Drill Core and Cutting Mineralogy using Infrared Rapid Characterization of Drill Core and Cutting Mineralogy using Infrared Spectroscopy Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal Article: Rapid Characterization of Drill Core and Cutting Mineralogy using Infrared Spectroscopy Abstract Infrared spectroscopy is particularly good at identifying awide variety of hydrothermally altered minerals with no samplepreparation, and is especially helpful in discrimination amongclay minerals. We have performed several promising pilot studieson geothermal drill core and cuttings that suggest the efficiencyof the technique to sample continuously and provide alterationlogs similar to geophysical logs. We have successfully identifiedlayered silicates, zeolites, opal, calcite, and iron oxides and

314

" A Heterodyne Laser-induced Fluorescence Technique to Determine  

NLE Websites -- All DOE Office Websites (Extended Search)

A Heterodyne Laser-induced Fluorescence Technique to Determine A Heterodyne Laser-induced Fluorescence Technique to Determine Simultaneously the Bulk and Time Varying Molecule Velocity Distribution." Inventors Ahmed Diallo, Stephane Mazouffre.The method's primary goal is to determine simultaneously the bulk a The method's primary goal is to determine simultaneously the bulk and the time verying part of the molecule velocity distribution using a heterodyne laser induced fluorescence technique. Used in biology, chemistry and plasma physics laser-induced fluorescence is a well known technique to resolve the bulk velocity distribution of probed molecules and atoms in a medium. The novel approach is aimed at determining not only the bulk distribution, but also the time-varying velocity distribution. The two parts of the velocity distribution are key in the characterization of a

315

Innovative Technique Accelerates Waste Disposal at Idaho Site | Department  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Innovative Technique Accelerates Waste Disposal at Idaho Site Innovative Technique Accelerates Waste Disposal at Idaho Site Innovative Technique Accelerates Waste Disposal at Idaho Site May 15, 2013 - 12:00pm Addthis A product drum of mixed low-level waste is lowered into a high-density polyethylene macro-pack. A product drum of mixed low-level waste is lowered into a high-density polyethylene macro-pack. Macro-packs from the Idaho site are shown here safely and compliantly disposed. Macro-packs from the Idaho site are shown here safely and compliantly disposed. A product drum of mixed low-level waste is lowered into a high-density polyethylene macro-pack. Macro-packs from the Idaho site are shown here safely and compliantly disposed. IDAHO FALLS, Idaho - An innovative treatment and disposal technique is enabling the Idaho site to accelerate shipments of legacy nuclear waste for

316

Evaluation of the Mercury Soil Mapping Geothermal Exploration Techniques |  

Open Energy Info (EERE)

Evaluation of the Mercury Soil Mapping Geothermal Exploration Techniques Evaluation of the Mercury Soil Mapping Geothermal Exploration Techniques Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: Evaluation of the Mercury Soil Mapping Geothermal Exploration Techniques Abstract In order to evaluate the suitability of the soil mercury geochemical survey as a geothermal exploration technique, soil concentrates of mercy are compared to the distribution of measured geothermal gradients at Dixie Valley, Nevada; Roosevelt Hot Springs, Utah; and Nova, Japan. Zones containing high mercury values are found to closely correspond to high geothermal gradient zones in all three areas. Moreover, the highest mercury values within the anomalies are found near the wells with the highest geothermal gradient. Such close correspondence between soil concentrations

317

Airborne electromagnetic surveys as a reconnaissance technique for  

Open Energy Info (EERE)

electromagnetic surveys as a reconnaissance technique for electromagnetic surveys as a reconnaissance technique for geothermal exploration Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: Airborne electromagnetic surveys as a reconnaissance technique for geothermal exploration Details Activities (1) Areas (1) Regions (0) Abstract: INPUT airborne electromagnetic (AEM) surveys were conducted during 1979 in five Known Geothermal Resource Areas (KGRA's). AEM work has not been significantly utilized in the past for geothermal purposes because it was thought that a shallow exploration technique would not be effective. Extensive audio-magnetotelluric (AMT) work by the USGS in KGRA's showed that many geothermal systems do have a near-surface electrical signature which should be detectable by an AEM system. INPUT responses in the form of

318

Cavitation methods in therapeutic ultrasound : techniques, mechanisms, and system design  

E-Print Network (OSTI)

Focused ultrasound is currently being developed as a non-invasive thermal ablation technique for benign and cancerous tumors in several organ systems. Although these therapies are designed to ablate tissue purely by thermal ...

Sokka, Shunmugavelu D. (Shunmugavelu Doraivelu), 1975-

2004-01-01T23:59:59.000Z

319

Advisory Group On The Application Of Nuclear Techniques To Geothermal...  

Open Energy Info (EERE)

Page Edit History Facebook icon Twitter icon Advisory Group On The Application Of Nuclear Techniques To Geothermal Studies-Meeting In Pisa 8-12 Sep 1975 Jump to: navigation,...

320

Quadrupole Magnetic Center Definition Using the Hall Probe Measurement Technique  

NLE Websites -- All DOE Office Websites (Extended Search)

Quadrupole Magnetic Center Definition Quadrupole Magnetic Center Definition Using the Hall Probe Measurement Technique Isaac Vasserman Experimental Facility Division, Advanced Photon Source, Argonne National Laboratory 1. Introduction The linac coherent light source [LCLS] project [1] requires 5 ”m straightness of the particle beam trajectory to achieve the desired goal of x-ray multiplication. The main source of beam trajectory distortion is misalignment of quadrupoles. The LCLS project will use a beam-based alignment technique to align the quadrupoles to the needed accuracy. An initial accuracy of the quadrupole alignment not worse than 50 ”m is required [2]. A different technique could be used for this purpose. It would be though quite desirable to avoid using an additional magnetic measurement technique and to use

Note: This page contains sample records for the topic "techniques drilling techniques" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Exploration and Development Techniques for Basin and Range Geothermal  

Open Energy Info (EERE)

Techniques for Basin and Range Geothermal Techniques for Basin and Range Geothermal Systems: Examples from Dixie Valley, Nevada Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: Exploration and Development Techniques for Basin and Range Geothermal Systems: Examples from Dixie Valley, Nevada Abstract Abstract unavailable. Authors David D. Blackwell, Mark Leidig, Richard P. Smith, Stuart D. Johnson and Kenneth W. Wisian Conference GRC Annual Meeting; Reno, NV; 2002/09/22 Published Geothermal Resources Council, 2002 DOI Not Provided Check for DOI availability: http://crossref.org Online Internet link for Exploration and Development Techniques for Basin and Range Geothermal Systems: Examples from Dixie Valley, Nevada Citation David D. Blackwell,Mark Leidig,Richard P. Smith,Stuart D. Johnson,Kenneth

322

Argonne CNM News: A better etching technique: sequential infiltration  

NLE Websites -- All DOE Office Websites (Extended Search)

A Better Etching Technique Is Invented A Better Etching Technique Is Invented Mark Holt (Argonne Center for Nanoscale Materials) examines a sample in the Hard X-Ray Nanoprobe Deep canyons can be etched into materials at the nanoscale with a new SIS-based lithography technique Nanoscientists at Argonne's Center for Nanoscale Materials and Energy Systems Division have discovered a new way to transfer patterns onto different materials, an innovation that combines new tricks with an old technology. One of the biggest recent questions facing materials science has involved the development of better techniques for high-resolution lithographies such as electron-beam (e-beam) lithography. E-beam lithography is used to manufacture the tiniest of structures, including microelectronics and advanced sensors; beams of electrons are part of a

323

Innovative Technique Accelerates Waste Disposal at Idaho Site | Department  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Innovative Technique Accelerates Waste Disposal at Idaho Site Innovative Technique Accelerates Waste Disposal at Idaho Site Innovative Technique Accelerates Waste Disposal at Idaho Site May 15, 2013 - 12:00pm Addthis A product drum of mixed low-level waste is lowered into a high-density polyethylene macro-pack. A product drum of mixed low-level waste is lowered into a high-density polyethylene macro-pack. Macro-packs from the Idaho site are shown here safely and compliantly disposed. Macro-packs from the Idaho site are shown here safely and compliantly disposed. A product drum of mixed low-level waste is lowered into a high-density polyethylene macro-pack. Macro-packs from the Idaho site are shown here safely and compliantly disposed. IDAHO FALLS, Idaho - An innovative treatment and disposal technique is enabling the Idaho site to accelerate shipments of legacy nuclear waste for

324

Definition: Data and Modeling Techniques | Open Energy Information  

Open Energy Info (EERE)

Definition Definition Edit with form History Facebook icon Twitter icon » Definition: Data and Modeling Techniques Jump to: navigation, search Dictionary.png Data and Modeling Techniques Physical properties and other reservoir performance data are typically used to constrain conceptual and then quantitative models of individual reservoirs. The constraint on individual models is improved as the number of independent data types and sets increases. View on Wikipedia Wikipedia Definition Data modeling in software engineering is the process of creating a data model for an information system by applying formal data modeling techniques. Ret LikeLike UnlikeLike You like this.Sign Up to see what your friends like. rieved from "http://en.openei.org/w/index.php?title=Definition:Data_and_Modeling_Techniques&oldid=690516"

325

A Distinction Technique Between Volcanic And Tectonic Depression Structures  

Open Energy Info (EERE)

Distinction Technique Between Volcanic And Tectonic Depression Structures Distinction Technique Between Volcanic And Tectonic Depression Structures Based On The Restoration Modeling Of Gravity Anomaly- A Case Study Of The Hohi Volcanic Zone, Central Kyushu, Japan Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: A Distinction Technique Between Volcanic And Tectonic Depression Structures Based On The Restoration Modeling Of Gravity Anomaly- A Case Study Of The Hohi Volcanic Zone, Central Kyushu, Japan Details Activities (0) Areas (0) Regions (0) Abstract: In this study, we propose a numerical modeling technique which restores the gravity anomaly of tectonic origin and identifies the gravity low of caldera origin. The identification is performed just by comparing the restored gravity anomalies with the observed gravity anomalies, thus we

326

Lipid Analysis and Lipidomics: New Techniques and Application  

Science Conference Proceedings (OSTI)

Lipid Analysis will offer the lipid analyst an array of essential analytical tools in the fields of chromatography, mass spectrometry, spectroscopy, magnetic resonance, and chemometrics. Lipid Analysis and Lipidomics: New Techniques and Application Method

327

Obliquely Rotated Principal Components: An Improved Meteorological Map Typing Technique?  

Science Conference Proceedings (OSTI)

A detailed analysis of obliquely rotated principal components as a map typing technique was performed. This type of transformation does not constrain orthogonality of the vectors, allowing the components or map types the freedom to better reflect ...

Michael B. Richman

1981-10-01T23:59:59.000Z

328

Low phase noise, high bandwidth frequency synthesis techniques  

E-Print Network (OSTI)

A quantization noise reduction technique is proposed that allows fractional-N frequency synthesizers to achieve high closed loop bandwidth and low output phase noise simultaneously. Quantization induced phase noise is the ...

Meninger, Scott (Scott Edward), 1974-

2005-01-01T23:59:59.000Z

329

A Balloon Sounding Technique for Measuring SO2 Plumes  

Science Conference Proceedings (OSTI)

This paper reports on the development of a new technique for inexpensive measurements of SO2 profiles using a modified dual-ozonesonde instrument payload. The presence of SO2 interferes with the standard electrochemical cell (ECC) ozonesonde ...

Gary A. Morris; Walter D. Komhyr; Jun Hirokawa; James Flynn; Barry Lefer; Nicholay Krotkov; Fong Ngan

2010-08-01T23:59:59.000Z

330

Robust techniques for developing empirical models of fluidized bed combustors  

E-Print Network (OSTI)

This report is designed to provide a review of those data analysis techniques that are most useful for fitting m-dimensional empirical surfaces to very large sets of data. One issue explored is the improvement

Gruhl, Jim

331

An Improved Filter Technique for Ice Nucleus Measurements  

Science Conference Proceedings (OSTI)

No satisfactory standard field method has been established for the measurement of ice nucleus concentrations, although the filter technique is a promising candidate if the tendency for ice nucleus concentrations to decrease as the sample volume ...

Chi-Fan Shih; Takeshi Ohtake

1985-09-01T23:59:59.000Z

332

Relevance Feedback Techniques for Color-based Image Retrieval  

Science Conference Proceedings (OSTI)

Color has been widely used in content-based image retrieval systems. The problem with using color is that its representation is low level and hence its retrieval effectiveness is limited. This paper investigates techniques to improving the effectiveness ...

T. S. Chua; W. C. Low; C. X. Chu

1998-10-01T23:59:59.000Z

333

The Spaced Antenna Technique for Radar Wind Profiling  

Science Conference Proceedings (OSTI)

The Doppler method for radar wind profiling of the troposphere and stratosphere has been the standard technique used for operational and most research applications of the instrumentation. An alternative approach for measuring winds, by making use ...

M. F. Larsen; J. Röttger

1989-12-01T23:59:59.000Z

334

Randomizing smartphone malware profiles against statistical mining techniques  

Science Conference Proceedings (OSTI)

The growing use of smartphones opens up new opportunities for malware activities such as eavesdropping on phone calls, reading e-mail and call-logs, and tracking callers' locations. Statistical data mining techniques have been shown to be applicable ...

Abhijith Shastry; Murat Kantarcioglu; Yan Zhou; Bhavani Thuraisingham

2012-07-01T23:59:59.000Z

335

Graph-Theoretic Techniques for Web Content Mining  

Science Conference Proceedings (OSTI)

Describing exciting new opportunities for utilizing robust graph representations of data with common machine learning algorithms, this book demonstrates and investigates these novel techniques through the domain of web content mining.

Adam Schenker; Horst Bunke; Mark Last; Abraham Kandel

2005-05-01T23:59:59.000Z

336

Companding technique for high dynamic range measurements using Gafchromic films  

Science Conference Proceedings (OSTI)

Purpose: To introduce a methodology to perform dose measurements using Gafchromic films which can span several decades of dose levels. Methods: The technique is based on a rescaling approach using different films irradiated at different dose levels. This is combined with a registration protocol correcting positioning and scaling factors for each film. The methodology is validated using TLD's for out-of-field doses. Furthermore, two examples are provided using the technique to characterize small sized radiosurgery cones and compared with measurements made with a pinpoint chamber. Results: Excellent agreement with TLD, planning systems and measurement was found. The superior resolution of the film technique was apparent. Conclusions: The authors have introduced a new technique allowing users to quantify very low doses in conjunction with commissioning measurements. The use of film also provides 2D information on beam characteristics in high resolution measurements.

Van den Heuvel, Frank; Crijns, Wouter; Defraene, Gilles [Department of Experimental Radiotherapy, Catholic University of Leuven, Leuven, Belgium B-3000 (Belgium)

2011-12-15T23:59:59.000Z

337

New concepts and techniques in eco-composition  

Science Conference Proceedings (OSTI)

This paper has two main objectives: (i) to discuss essential concepts of the ecological approach to composition, proposing the term eco-composition as a common reference for theoretical perspectives and compositional techniques; and (ii) to present ...

Damián Keller; Ariadna Capasso

2006-04-01T23:59:59.000Z

338

Completion techniques for geothermal-geopressured wells. Final report  

DOE Green Energy (OSTI)

The following are covered: oil well completions, water well completions, sand control techniques, geopressured oil and gas wells, and geopressured water well completion. The conclusions for a geothermal-geopressured water well completion and needed research are included. (MHR)

Boyd, W.E.

1974-01-01T23:59:59.000Z

339

Spoken Content Retrieval: A Survey of Techniques and Technologies  

Science Conference Proceedings (OSTI)

Speech media, that is, digital audio and video containing spoken content, has blossomed in recent years. Large collections are accruing on the Internet as well as in private and enterprise settings. This growth has motivated extensive research on techniques ...

Martha Larson; Gareth J. F. Jones

2012-04-01T23:59:59.000Z

340

The characterization of particle clouds using optical imaging techniques  

E-Print Network (OSTI)

Optical imaging techniques can be used to provide a better understanding of the physical properties of particle clouds. The purpose of this thesis is to design, perform and evaluate a set of experiments using optical imaging ...

Bruce, Elizabeth J. (Elizabeth Jane), 1972-

1998-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "techniques drilling techniques" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Atmospheric Precorrected Differential Absorption technique to retrieve columnar water vapor  

Science Conference Proceedings (OSTI)

Differential absorption techniques are suitable to retrieve the total column water vapor contents from imaging spectroscopy data. A technique called Atmospheric Precorrected Differential Absorption (APDA) is derived directly from simplified radiative transfer equations. It combines a partial atmospheric correction with a differential absorption technique. The atmospheric path radiance term is iteratively corrected during the retrieval of water vapor. This improves the results especially over low background albedos. The error of the method for various ground reflectance spectra is below 7% for most of the spectra. The channel combinations for two test cases are then defined, using a quantitative procedure, which is based on MODTRAN simulations and the image itself. An error analysis indicates that the influence of aerosols and channel calibration is minimal. The APDA technique is then applied to two AVIRIS images acquired in 1991 and 1995. The accuracy of the measured water vapor columns is within a range of {+-}5% compared to ground truth radiosonde data.

Schlaepfer, D.; Itten, K.I. [Univ. of Zuerich (Switzerland). Dept. of Geography] [Univ. of Zuerich (Switzerland). Dept. of Geography; Borel, C.C. [Los Alamos National Lab., NM (United States)] [Los Alamos National Lab., NM (United States); Keller, J. [Paul Scherrer Inst., Villigen (Switzerland)] [Paul Scherrer Inst., Villigen (Switzerland)

1998-09-01T23:59:59.000Z

342

Techniques of Linear Prediction for Systems with Periodic Statistics  

Science Conference Proceedings (OSTI)

Many parameters that measure climatic variability have nonstationary statistics, that is, they depend strongly on the phase of the annual cycle. In this case normal statistical analysis techniques based on time-invariant models are inappropriate. ...

K. Hasselmann; T. P. Barnett

1981-10-01T23:59:59.000Z

343

The elements of nature: interactive and realistic techniques  

Science Conference Proceedings (OSTI)

This updated course on simulating natural phenomena will cover the latest research and production techniques for simulating most of the elements of nature. The presenters will provide movie production, interactive simulation, and research perspectives ...

Oliver Deusen; David S. Ebert; Ron Fedkiw; F. Kenton Musgrave; Przemyslaw Prusinkiewicz; Doug Roble; Jos Stam; Jerry Tessendorf

2004-08-01T23:59:59.000Z

344

C++ programming techniques for High Performance Computing on systems with  

E-Print Network (OSTI)

C++ programming techniques for High Performance Computing on systems with non-uniform memory access (including NUMA) without sacrificing performance. ccNUMA In High Performance Computing (HPC), shared- memory

Sanderson, Yasmine

345

Development of manufacturing technique for composite structures for robotic applications  

E-Print Network (OSTI)

An experimental study was performed with the aim of developing a technique for manufacturing composite parts for use in dynamic robotic applications in lieu of heavy and expensive metal parts used in conventional robotic ...

Dixon, Theresa, S.B. Massachusetts Institute of Technology

2010-01-01T23:59:59.000Z

346

Ocean Currents from Successive Satellite Images: The Reciprocal Filtering Technique  

Science Conference Proceedings (OSTI)

Cross-correlation analyses of successive satellite images of the ocean surface can provide estimates of surface currents by tracking features of temperature or ocean color. While the technique successfully identifies many true vectors, it also ...

Ian J. Barton

2002-10-01T23:59:59.000Z

347

The Interpolation of Data Series Using a Constrained Iterating Technique  

Science Conference Proceedings (OSTI)

A consistent interpolation technique, applicable to data series, is presented. Demonstrative examples are given where consistency is defined as conservation of mean or of second-order moment; the interpolants are linear or spline functions. The ...

Ali Harzallah

1995-07-01T23:59:59.000Z

348

Surface space : digital manufacturing techniques and emergent building material  

E-Print Network (OSTI)

This thesis explores tectonic possibilities of new material and forming techniques. The design process is catalyzed by experimenting different configurations of the material.This project attempts to develop inventive ways ...

Ho, Joseph Chi-Chen, 1975-

2002-01-01T23:59:59.000Z

349

A Dual-Frequency Microwave Technique for Measuring Rainwater Content  

Science Conference Proceedings (OSTI)

While there are many microwave techniques for estimating the rainfall rate, there are presently few if any for accurately determining the rainwater content (W). This study shows that the dual-frequency (38, 25 GHZ) differential attenuation (A38?...

A. R. Jameson

1992-02-01T23:59:59.000Z

350

Empirical Dynamical System Modeling of ENSO Using Nonlinear Inverse Techniques  

Science Conference Proceedings (OSTI)

A statistical technique is presented that allows for the empirical derivation of dynamical system equations from data. It is based on multiple nonparametric regression analysis and is applicable to a broad class of physical systems. It is applied ...

A. Timmermann; H. U. Voss; R. Pasmanter

2001-06-01T23:59:59.000Z

351

High-Throughput/Combinatorial Techniques in Hydrogen Storage...  

NLE Websites -- All DOE Office Websites (Extended Search)

High-ThroughputCombinatorial Techniques in Hydrogen Storage Materials R&D Ned Stetson, Larry Blair 1 , Grace Ordaz, Carole Read, George Thomas 2 , and Sunita Satyapal Suite 900,...

352

Genome scanning : an AFM-based DNA sequencing technique  

E-Print Network (OSTI)

Genome Scanning is a powerful new technique for DNA sequencing. The method presented in this thesis uses an atomic force microscope with a functionalized cantilever tip to sequence single stranded DNA immobilized to a mica ...

Elmouelhi, Ahmed (Ahmed M.), 1979-

2003-01-01T23:59:59.000Z

353

Intercomparison of Local Hydroxyl Measurements by Radiocarbon and FAGE Techniques  

Science Conference Proceedings (OSTI)

A direct intercomparison of near-surface tropospheric HO concentration measurements by two different techniques was made in October–November 1992 at a rural site near Pullman, Washington. The atmosphere at the site is believed to contain low ...

Malcolm J. Campbell; Brad D. Hall; John C. Sheppard; Philip L. Utley; Robert J. O'brien; Thomas M. Hard; Linda A. George

1995-10-01T23:59:59.000Z

354

An Alternative Tropical Cyclone Intensity Forecast Verification Technique  

Science Conference Proceedings (OSTI)

The National Hurricane Center (NHC) does not verify official or model forecasts if those forecasts call for a tropical cyclone to dissipate or if the real tropical cyclone dissipates. A new technique in which these forecasts are included in a ...

Sim D. Aberson

2008-12-01T23:59:59.000Z

355

Nonlinear stochastic system identification techniques for biological tissues/  

E-Print Network (OSTI)

This research develops a device capable of measuring the nonlinear dynamic mechanical properties of human tissue in vivo. The enabling technology is the use of nonlinear stochastic system identification techniques in ...

Chen, Yi, S.M. Massachusetts Institute of Technology

2010-01-01T23:59:59.000Z

356

A critical comparison of human face rendering techniques  

E-Print Network (OSTI)

Human skin exhibits complex light reflectance properties that make it difficult to render realistically. In recent years, many techniques have been introduced to render skin, with varying degrees of complexity and realism. ...

Arizpe, Arturo Andrew

2006-01-01T23:59:59.000Z

357

Crosswinds from a Single-Aperture Scintillometer Using Spectral Techniques  

Science Conference Proceedings (OSTI)

In this study, spectral techniques to obtain crosswinds from a single large-aperture scintillometer (SLAS) time series are investigated. The crosswind is defined as the wind component perpendicular to a path. A scintillometer obtains a path-...

Daniëlle van Dinther; Oscar K. Hartogensis; Arnold F. Moene

2013-01-01T23:59:59.000Z

358

African Easterly Waves during 2004—Analysis Using Objective Techniques  

Science Conference Proceedings (OSTI)

African easterly waves (AEWs) are identified in numerical model analyses using an objective technique based on the 700-hPa streamfunction field. This method has been developed to (i) reduce the amount of manual data interpretation, (ii) reduce ...

Gareth Berry; Chris Thorncroft; Tim Hewson

2007-04-01T23:59:59.000Z

359

Benefits of the Multiple Echo Technique for Ultrasonic Thickness Testing  

SciTech Connect

Much effort has been put into determining methods to make accurate thickness measurements, especially at elevated temperatures. An accuracy of +/- 0.001 inches is typically noted for commercial ultrasonic thickness gauges and ultrasonic thickness techniques. Codes and standards put limitations on many inspection factors including equipment, calibration tolerance and temperature variations. These factors are important and should be controlled, but unfortunately do not guarantee accurate and repeatable measurements in the field. Most technicians long for a single technique that is best for every situation, unfortunately, there are no 'silver bullets' when it comes to nondestructive testing. This paper will describe and discuss some of the major contributors to measurement error as well as some advantages and limitations of multiple echo techniques and why multiple echo techniques should be more widely utilized for ultrasonic thickness measurements.

Elder, J.; Vandekamp, R.

2011-02-10T23:59:59.000Z

360

An Objective Isobaric/Isentropic Technique for Upper Air Analysis  

Science Conference Proceedings (OSTI)

An objective meteorological analysis technique has been developed to provide both horizontal and vertical (cross-sectional) upper air analyses. The horizontal analyses are made at grid points that lie on isobaric levels in a conventional manner. ...

Robert L. Mancuso; Roy M. Endlich; L. J. Ehernberger

1981-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "techniques drilling techniques" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

The Sensitivity to Parametric Variation in Direct Minimization Techniques  

Science Conference Proceedings (OSTI)

Solutions of some objective analysis techniques are known to depend upon the subjective values of internal parameters. The change in the solution per change in the parameter is the sensitivity. Parameters with low sensitivity can be varied with ...

S. D. Meyers; C. Stephens Jones; D. M. Legler; K. F. Miles; J. J. O'Brien

1994-07-01T23:59:59.000Z

362

Sandia/DOE geothermal drilling and completion technology development program  

DOE Green Energy (OSTI)

The high cost of drilling and completing geothermal wells is an impediment to the development of geothermal energy resources. Technological deficiencies in rotary drilling techniques are evidenced when drilling geothermal wells. The Division of Geothermal Energy (DGE) of the US Department of Energy (DOE) has initiated a program aimed at developing new drilling and completion techniques for geothermal wells. The goals of this program are to reduce well costs 25% by 1982 and 50% by 1986. Sandia Laboratories has managed this technology development program since October 1977, and this paper presents an overview of the program. A statement of program goals and structure is given. The content of the FY-79 program is presented and recent results of R and D projects are given. Plans for development of an advanced drilling and completion system are discussed.

Barnette, J.H.

1979-01-01T23:59:59.000Z

363

Procedural and administrative techniques to improve steam generator layup  

Science Conference Proceedings (OSTI)

A number of utilities have been working to improve layup techniques for steam generators; especially once-through steam generators. There are two main elements to successful layup of steam generators: (a) starting with and maintaining high-quality layup water and (b) minimizing the exposure of steam generator internals to air. Specific procedural and administrative techniques have been developed to ensure these two elements are achieved. These appear to be applicable to most steam generators.

Carrick, B.J.

1985-01-01T23:59:59.000Z

364

The Application of Molecular Genetics Techniques to Bioremediation Processes  

Science Conference Proceedings (OSTI)

Bioremediation, a process that uses microorganisms to degrade toxic compounds, has cleaned up a number of organic wastes in the past and holds great potential for helping to clean up organic-contaminated soil and water sites in the future. One proposal suggests that molecular genetic techniques can be used to assess the genetic ecology of a contaminated site and to assist in increasing biodegradation rates. This study assesses the applicability of molecular genetic techniques to bioremediation.

1989-12-08T23:59:59.000Z

365

Self-imaging-based laser collimation testing technique  

Science Conference Proceedings (OSTI)

Laser collimation is required in many experiments based on lasers. Some laser experiments demand a high quality of collimation, e.g., the optical coherent processor, image transformer, and Fourier transform generator. A device is required to test the collimation of lasers in such experiments. We have suggested a modification in existing collimation testing techniques by which sensitivity can be improved. Theoretical analysis and experimental results demonstrate twice the improvement in sensitivity when used with previous techniques.

Mudassar, Asloob A.; Butt, Saira

2010-11-01T23:59:59.000Z

366

Technique for identifying, tracing, or tracking objects in image data  

SciTech Connect

A technique for computer vision uses a polygon contour to trace an object. The technique includes rendering a polygon contour superimposed over a first frame of image data. The polygon contour is iteratively refined to more accurately trace the object within the first frame after each iteration. The refinement includes computing image energies along lengths of contour lines of the polygon contour and adjusting positions of the contour lines based at least in part on the image energies.

Anderson, Robert J. (Albuquerque, NM); Rothganger, Fredrick (Albuquerque, NM)

2012-08-28T23:59:59.000Z

367

Application Guide for Emerging Condition-Monitoring Techniques for Transformers  

Science Conference Proceedings (OSTI)

This Technical Update presents the first year of progress in a multi-year effort toward a complete Application Guide for Emerging Condition-Monitoring Techniques for Transformers.The purpose of this guide is to provide practical assistance to members on the selection, application, and interpretation of emerging transformer condition monitoring. To date, the emerging techniques covered in this guide have had limited application in the field. The guide presents the latest ...

2012-12-20T23:59:59.000Z

368

Literature survey of heat transfer enhancement techniques in refrigeration applications  

Science Conference Proceedings (OSTI)

A survey has been performed of the technical and patent literature on enhanced heat transfer of refrigerants in pool boiling, forced convection evaporation, and condensation. Extensive bibliographies of the technical literature and patents are given. Many passive and active techniques were examined for pure refrigerants, refrigerant-oil mixtures, and refrigerant mixtures. The citations were categorized according to enhancement technique, heat transfer mode, and tube or shell side focus. The effects of the enhancement techniques relative to smooth and/or pure refrigerants were illustrated through the discussion of selected papers. Patented enhancement techniques also are discussed. Enhanced heat transfer has demonstrated significant improvements in performance in many refrigerant applications. However, refrigerant mixtures and refrigerant-oil mixtures have not been studied extensively; no research has been performed with enhanced refrigerant mixtures with oil. Most studies have been of the parametric type; there has been inadequate examination of the fundamental processes governing enhanced refrigerant heat transfer, but some modeling is being done and correlations developed. It is clear that an enhancement technique must be optimized for the refrigerant and operating condition. Fundamental processes governing the heat transfer must be examined if models for enhancement techniques are to be developed; these models could provide the method to optimize a surface. Refrigerant mixtures, with and without oil present, must be studied with enhancement devices; there is too little known to be able to estimate the effects of mixtures (particularly NARMs) with enhanced heat transfer. Other conclusions and recommendations are offered.

Jensen, M.K.; Shome, B. [Rensselaer Polytechnic Inst., Troy, NY (United States). Dept. of Mechanical Engineering, Aeronautical Engineering and Mechanics

1994-05-01T23:59:59.000Z

369

ALS Scientists Patent Technique To Dramatically Advance Grating-Based  

NLE Websites -- All DOE Office Websites (Extended Search)

ALS Scientists Patent Technique To ALS Scientists Patent Technique To Dramatically Advance Grating-Based Spectroscopy ALS Scientists Patent Technique To Dramatically Advance Grating-Based Spectroscopy Print Tuesday, 29 January 2013 16:28 Gratings - optical elements used to separate light in spectroscopy applications - have been in use since the early 19th century. Developments in the late 19th century led to the manufacture of gratings by highly precise ruling with a diamond onto a metallic surface. Many gratings are still produced today using the same technique. Holographic methods and ion etching are also used, but all of these techniques result in gratings that contain significant imperfections, which limits resolution. Watch a video about this topic... However, a new type of ultra-high diffraction grating recently patented by members of the ALS Experimental Systems Group (ESG), working with colleagues from Berkeley Lab's Center for X-ray Optics, stands to revolutionize the resolution capabilities of soft x-ray spectroscopy. The key to the new technique is the production of a near atomically perfect substrate, using the anisotropic etching of silicon.

370

ALS Scientists Patent Technique To Dramatically Advance Grating-Based  

NLE Websites -- All DOE Office Websites (Extended Search)

ALS Scientists Patent Technique To Dramatically ALS Scientists Patent Technique To Dramatically Advance Grating-Based Spectroscopy ALS Scientists Patent Technique To Dramatically Advance Grating-Based Spectroscopy Print Gratings - optical elements used to separate light in spectroscopy applications - have been in use since the early 19th century. Developments in the late 19th century led to the manufacture of gratings by highly precise ruling with a diamond onto a metallic surface. Many gratings are still produced today using the same technique. Holographic methods and ion etching are also used, but all of these techniques result in gratings that contain significant imperfections, which limits resolution. Watch a video about this topic... However, a new type of ultra-high diffraction grating recently patented by members of the ALS Experimental Systems Group (ESG), working with colleagues from Berkeley Lab's Center for X-ray Optics, stands to revolutionize the resolution capabilities of soft x-ray spectroscopy. The key to the new technique is the production of a near atomically perfect substrate, using the anisotropic etching of silicon.

371

Development and Application of Insulated Drill Pipe for High Temperature, High Pressure Drilling  

Science Conference Proceedings (OSTI)

This project aimed to extend the insulated drill pipe (IDP) technology already demonstrated for geothermal drilling to HTHP drilling in deep gas reservoirs where temperatures are high enough to pose a threat to downhole equipment such as motors and electronics. The major components of the project were: a preliminary design; a market survey to assess industry needs and performance criteria; mechanical testing to verify strength and durability of IDP; and development of an inspection plan that would quantify the ability of various inspection techniques to detect flaws in assembled IDP. This report is a detailed description of those activities.

Tom Champness; Tony Worthen; John Finger

2008-12-31T23:59:59.000Z

372

Review of the Drilling R and D Program at Sandia  

DOE Green Energy (OSTI)

Drilling projects conducted for the Division of Geothermal Energy (DGE) and the Office of Energy Research (OER), both of the Department of Energy (DOE), are described. The DGE Well Technology Program includes drilling, well completion, and high temperature logging instrumentation R and D for geothermal applications. Accomplishments to date include successful laboratory testing of the continuous chain drill and development of temperature, pressure, and flow sondes capable of operation at 275/sup 0/C. Efforts are also under way to develop high-temperature, high-performance bits, high-temperature drilling fluids, and high-temperature downhole motors. Bearings, seals, and lubricants for use in high-temperature bits and motors are also being developed and tested. Recent results are presented. An OER drilling experiment into a lava lake at Kilauea Iki, Hawaii, is being conducted. Materials and techniques for drilling into an active magma/hydrothermal system are in a preliminary phase of study.

Stoller, H.M.

1978-01-01T23:59:59.000Z

373

New Developments in LC-MS and Other Hyphenated Techniques  

SciTech Connect

Extensive challenges faced by analytical chemists in studying real world complex samples such as biological body fluids, tissue samples, environmental and geological samples have lead to the development of advanced analytical approaches. The vast array of contemporary technologies can be categorized into two major areas: sample separation and mass spectrometry analysis. Current state-of-the-art sample separation methods include gas chromatography, high performance liquid chromatography, ultra high pressure liquid chromatography, solid phase extraction, capillary electrophoresis, and gas phase separation techniques such as ion mobility spectrometry. The recent trend in sample separation is to combine (or hyphenate) multiple techniques that employ different separation mechanisms to maximize separation efficiency. The most widely used combinations include two-dimensional gas chromatography, strong cation exchange or weak cation exchange chromatography followed by reversed-phase liquid chromatography, two-dimensional reversed-phase liquid chromatography, liquid chromatography followed by ion mobility spectrometry and two-dimensional electrophoresis techniques. The introduction of atmospheric pressure ionization techniques such as electrospray ionization and matrix assisted laser desorption ionization and variations of the two have drastically increased the impact of mass spectrometry on bioanalytical applications. Mass spectrometry itself has tremendously improved over the years in terms of sensitivity, detection limits, dynamic range and sequencing capabilities. Currently, mass spectrometers can attain zeptomolole detection limits with five orders of magnitude dynamic range. In this chapter, we summarize recent developments in hyphenated techniques and their applications to complex sample analysis.

Belov, Mikhail E.; Kurulugama, Ruwan T.; Lopez-Ferrer, Daniel; Ibrahim, Yehia M.; Baker, Erin Shammel

2011-06-21T23:59:59.000Z

374

Underbalanced drilling benefits now available offshore  

Science Conference Proceedings (OSTI)

Offshore underbalanced drilling (UBD) is a reality. Applications in older, partially depleted fields and new fields are being considered. However, low productivity reservoirs and fields with sub normal pressures causing drilling problems are currently the main targets for offshore UBD. With proper planning and the correct technique, both jointed pipe and coiled tubing UBD drilling operations have been carried out offshore with success. The main concerns for offshore UBD have been altered drilling practices and surface production system operation. These issues have been examined and equipment has been designed and tested to address them. Environmental, safety and health issues are paramount and have been studied carefully. Detailed well planning, engineering, and flow modeling have proven critical for successful offshore UBD operations. Examples are given from oil and gas fields.

Vozniak, J.P.; Cuthbertson, B.; Nessa, D.O.

1997-05-01T23:59:59.000Z

375

VLBI FOR GRAVITY PROBE B. IV. A NEW ASTROMETRIC ANALYSIS TECHNIQUE AND A COMPARISON WITH RESULTS FROM OTHER TECHNIQUES  

Science Conference Proceedings (OSTI)

When very long baseline interferometry (VLBI) observations are used to determine the position or motion of a radio source relative to reference sources nearby on the sky, the astrometric information is usually obtained via (1) phase-referenced maps or (2) parametric model fits to measured fringe phases or multiband delays. In this paper, we describe a 'merged' analysis technique which combines some of the most important advantages of these other two approaches. In particular, our merged technique combines the superior model-correction capabilities of parametric model fits with the ability of phase-referenced maps to yield astrometric measurements of sources that are too weak to be used in parametric model fits. We compare the results from this merged technique with the results from phase-referenced maps and from parametric model fits in the analysis of astrometric VLBI observations of the radio-bright star IM Pegasi (HR 8703) and the radio source B2252+172 nearby on the sky. In these studies we use central-core components of radio sources 3C 454.3 and B2250+194 as our positional references. We obtain astrometric results for IM Peg with our merged technique even when the source is too weak to be used in parametric model fits, and we find that our merged technique yields astrometric results superior to the phase-referenced mapping technique. We used our merged technique to estimate the proper motion and other astrometric parameters of IM Peg in support of the NASA/Stanford Gravity Probe B mission.

Lebach, D. E.; Ratner, M. I.; Shapiro, I. I. [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Bartel, N.; Bietenholz, M. F.; Lederman, J. I.; Ransom, R. R. [Department of Physics and Astronomy, York University, 4700 Keele Street, Toronto, ON M3J 1P3 (Canada); Campbell, R. M. [Joint Institute for VLBI in Europe, Oude Hoogeveensedijk 4, 7991 PD Dwingeloo (Netherlands); Gordon, D. [NVI Inc./NASA Goddard Space Flight Center, Greenbelt, MD 20771 (United States); Lestrade, J.-F. [Observatoire de Paris, Centre National de la Recherche Scientifique, 77 Av. Denfert Rochereau, 75014 Paris (France)

2012-07-01T23:59:59.000Z

376

Well Log Techniques At Coso Geothermal Area (1985) | Open Energy  

Open Energy Info (EERE)

Coso Geothermal Area (1985) Coso Geothermal Area (1985) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Well Log Techniques Activity Date 1985 Usefulness not indicated DOE-funding Unknown Exploration Basis Impact of long term testing on the well pressure Notes The downhole pressure monitoring equipment for each well included a stainless steel pressure chamber attached to a 0.25 inch stainless steel capillary tubing. The surface end of the capillary tubing was connected to a Paroscientific quartz pressure trandsducer. References Sanyal, S.; Menzies, A.; Granados, E.; Sugine, S.; Gentner, R. (20 January 1987) Long-Term Testing of Geothermal Wells in the Coso Hot Springs KGRA Retrieved from "http://en.openei.org/w/index.php?title=Well_Log_Techniques_At_Coso_Geothermal_Area_(1985)&oldid=600462

377

Operation Diagnostics: Use of Visualization Techniques and Operation  

NLE Websites -- All DOE Office Websites (Extended Search)

Operation Diagnostics: Use of Visualization Techniques and Operation Operation Diagnostics: Use of Visualization Techniques and Operation Patterns to Verify and Optimize Dynamic Building and System Operation Speaker(s): Oliver Baumann Date: December 7, 2004 - 12:00pm Location: Bldg. 90 Seminar Host/Point of Contact: Peng Xu Building automation systems (BAS) and building energy management systems (BEMS) have been used in modern edifices for the last 2 decades. These systems measure, process, and monitor a huge amount of data to operate the building and systems more or less properly. Often, the data is only used to signal failures or break-downs of systems or components. Further information of the data to analyze and diagnose the building operation is not used due to the lack of analysis methods and tools. Within the Operation Diagnostics, different visualization techniques are applied to

378

A Survey of Energy Saving Techniques for Mobile Computers  

E-Print Network (OSTI)

Portable products such as pagers, cordless and digital cellular telephones, personal audio equipment, and laptop computers are increasingly being used. Because these applications are battery powered, reducing power consumption is vital. In this report we first give a survey of techniques for accomplishing energy reduction on the hardware level such as: low voltage components, use of sleep or idle modes, dynamic control of the processor clock frequency, clocking regions, and disabling unused peripherals. Systemdesign techniques include minimizing external accesses, minimizing logic state transitions, and system partitioning using application-specific coprocessors. Then we review energy reduction techniques in the design of operating systems, including communication protocols, caching, scheduling and QoS management. Finally, we give an overview of policies to optimize the code of the application for energy consumption and make it aware of power management functions. Applications play a c...

Gerard J. M. Smit; Paul J.M. Havinga

1997-01-01T23:59:59.000Z

379

Electro-optic techniques in electron beam diagnostics  

Science Conference Proceedings (OSTI)

Electron accelerators such as laser wakefield accelerators, linear accelerators driving free electron lasers, or femto-sliced synchrotrons, are capable of producing femtosecond-long electron bunches. Single-shot characterization of the temporal charge profile is crucial for operation, optimization, and application of such accelerators. A variety of electro-optic sampling (EOS) techniques exists for the temporal analysis. In EOS, the field profile from the electron bunch (or the field profile from its coherent radiation) will be transferred onto a laser pulse co-propagating through an electro-optic crystal. This paper will address the most common EOS schemes and will list their advantages and limitations. Strong points that all techniques share are the ultra-short time resolution (tens of femtoseconds) and the single-shot capabilities. Besides introducing the theory behind EOS, data from various research groups is presented for each technique.

van Tilborg, Jeroen; Toth, Csaba; Matlis, Nicholas; Plateau, Guillaume; Leemans, Wim

2011-06-17T23:59:59.000Z

380

Improved criticality search techniques for low and high enriched systems  

SciTech Connect

A new automated search technique has been developed to improve the computational efficiency of performing criticality searches on low and high enriched systems with codes such as ANISN and KENO-IV. The technique employs a least-squares fit to a cubic polynomial on parameter values that have been previously generated either by the Extended Mean Value Theorem (EMVT) or by previous curve fits. The solution of the cubic for its roots at the desired value of K-effective completes one pass for the fixed value search while the solution of its derivative provides information about maximum values. This new search technique has been implemented in a FORTRAN routine called OPTMIZ which will eventually be part of a module in the SCALE system.

Lorek, M.J.; Dodds, H.L.; Petrie, L.M.; Westfall, R.M.

1979-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "techniques drilling techniques" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Statistical Modeling of Photovoltaic Reliability Using Accelerated Degradation Techniques (Poster)  

DOE Green Energy (OSTI)

We introduce a cutting-edge life-testing technique, accelerated degradation testing (ADT), for PV reliability testing. The ADT technique is a cost-effective and flexible reliability testing method with multiple (MADT) and Step-Stress (SSADT) variants. In an environment with limited resources, including equipment (chambers), test units, and testing time, these techniques can provide statistically rigorous prediction of lifetime and other interesting parameters, such as failure rate, warranty time, mean time to failure, degradation rate, activation energy, acceleration factor, and upper limit level of stress. J-V characterization can be used for degradation data and the generalized Eyring model can be used for the thermal-humidity stress condition. The SSADT model can be constructed based on the cumulative damage model (CEM), which assumes that the remaining test united are failed according to cumulative density function of current stress level regardless of the history on previous stress levels.

Lee, J.; Elmore, R.; Jones, W.

2011-02-01T23:59:59.000Z

382

Low Energy Buildings: CFD Techniques for Natural Ventilation and Thermal  

NLE Websites -- All DOE Office Websites (Extended Search)

Low Energy Buildings: CFD Techniques for Natural Ventilation and Thermal Low Energy Buildings: CFD Techniques for Natural Ventilation and Thermal Comfort Prediction Speaker(s): Malcolm Cook Date: February 14, 2013 - 12:00pm Location: 90-3122 Seminar Host/Point of Contact: Michael Wetter Malcolm's presentation will cover both his research and consultancy activities. This will cover the work he has undertaken during his time spent working with architects on low energy building design, with a particular focus on natural ventilation and passive cooling strategies, and the role computer simulation can play in this design process. Malcolm will talk about the simulation techniques employed, as well as the innovative passive design principles that have led to some of the UK's most energy efficient buildings. In addition to UK building projects, the talk will

383

Aiken Standard: Japanese company learns management techniques from SRNL |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Aiken Standard: Japanese company learns management techniques from Aiken Standard: Japanese company learns management techniques from SRNL Aiken Standard: Japanese company learns management techniques from SRNL January 21, 2013 - 12:00pm Addthis Savannah River National Laboratory scientist Dave Herman (right) discusses waste management equipment during a visit by Japanese scientists involved in the cleanup at Japan's Fukushima nuclear plant. Savannah River National Laboratory scientist Dave Herman (right) discusses waste management equipment during a visit by Japanese scientists involved in the cleanup at Japan's Fukushima nuclear plant. As representatives from Tokyo Electric Power Company visited Aiken, they discussed the efforts they are making to help remediate the damage caused by the worst nuclear accident since the Chernobyl explosion in April 1986.

384

Workshop on Time Domain Science Using X-ray Techniques  

NLE Websites -- All DOE Office Websites (Extended Search)

Time-Resolved Beamlines Time-Resolved Beamlines Advisory Committee Workshop Home Workshop Chairs: Lin Chen (Argonne National Laboratory) Steve Milton (Advanced Photon Source) David Reis (University of Michigan) Linda Young (Argonne National Laboratory) Workshop on Time Domain Science Using X-ray Techniques August 29 September 1, 2004, The Abbey, Fontana, Lake Geneva Area, Wisconsin A workshop on "Time Domain Science Using X-ray Techniques" was held from August 29 September 1, 2004 , welcoming both experts and beginners in the field. This is one of the concurrently held workshops in the series on "Future Scientific Directions for the Advanced Photon Source." The goal of the workshop was to identify future directions in scientific research using time resolved x-ray techniques and to address possiblities to produce ps

385

New imaging technique provides improved insight into controlling the plasma  

NLE Websites -- All DOE Office Websites (Extended Search)

New imaging technique provides improved insight into controlling the plasma New imaging technique provides improved insight into controlling the plasma in fusion experiments By John Greenwald December 9, 2013 Tweet Widget Facebook Like Google Plus One Graphic representation of 2D images of fluctuating electron temperatures in a cross-section of a confined fusion plasma. Graphic representation of 2D images of fluctuating electron temperatures in a cross-section of a confined fusion plasma. A key issue for the development of fusion energy to generate electricity is the ability to confine the superhot, charged plasma gas that fuels fusion reactions in magnetic devices called tokamaks. This gas is subject to instabilities that cause it to leak from the magnetic fields and halt fusion reactions. Now a recently developed imaging technique can help researchers improve

386

New imaging technique provides improved insight into controlling the plasma  

NLE Websites -- All DOE Office Websites (Extended Search)

New imaging technique provides improved insight into controlling the plasma New imaging technique provides improved insight into controlling the plasma in fusion experiments By John Greenwald December 9, 2013 Tweet Widget Facebook Like Google Plus One Graphic representation of 2D images of fluctuating electron temperatures in a cross-section of a confined fusion plasma. Graphic representation of 2D images of fluctuating electron temperatures in a cross-section of a confined fusion plasma. A key issue for the development of fusion energy to generate electricity is the ability to confine the superhot, charged plasma gas that fuels fusion reactions in magnetic devices called tokamaks. This gas is subject to instabilities that cause it to leak from the magnetic fields and halt fusion reactions. Now a recently developed imaging technique can help researchers improve

387

Thermal techniques for characterizing magma body geometries | Open Energy  

Open Energy Info (EERE)

techniques for characterizing magma body geometries techniques for characterizing magma body geometries Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Thermal techniques for characterizing magma body geometries Details Activities (1) Areas (1) Regions (0) Abstract: The surface heat flux distribution resulting from emplaced magma bodies can be used to help characterize the magma source. Closed-form analytical solutions for the conduction heat transfer from various idealized magma geometries (dikes, sills, and spheres) are obtained using either the Schwarz-Christoffel transformation theorem (dikes and sills) or the 'method of images' with superposition (spheres). Comparison of these analytically determined heat flux distributions with field data from active geothermal areas at Yellowstone, Avachinsky volcano, Kilauea Iki,

388

Centrifuge Techniques and Apparatus for Transport Experiments in Porous Media  

SciTech Connect

This paper describes experimental approaches and apparatus that we have developed to study solute and colloid transport in porous media using Idaho National Laboratory's 2-m radius centrifuge. The ex-perimental techniques include water flux scaling with applied acceleration at the top of the column and sub-atmospheric pressure control at the column base, automation of data collection, and remote experimental con-trol over the internet. These apparatus include a constant displacement piston pump, a custom designed liquid fraction collector based on switching valve technology, and modified moisture monitoring equipment. Suc-cessful development of these experimental techniques and equipment is illustrated through application to transport of a conservative tracer through unsaturated sand column, with centrifugal acceleration up to 40 gs. Development of such experimental equipment that can withstand high accelerations enhances the centrifuge technique to conduct highly controlled unsaturated solute/colloid transport experiments and allows in-flight liquid sample collection of the effluent.

Earl D. Mattson; Carl D. Paler; Robert W. Smith; Markus Flury

2010-06-01T23:59:59.000Z

389

Multi-angle technique for measurement of ground source emission  

SciTech Connect

TAISIR, the Temperature and Imaging System Infrared, is a nominally satellite based platform for remote sensing of the earth. One of its design features is to acquire atmospheric data simultaneous with ground data, resulting in minimal dependence on external atmospheric models for data correction. One technique we employ to acquire atmospheric data is a true multi-angle data acquisition technique. Previous techniques have used only two angles. Here we demonstrate the advantage of using a large number of viewing angles to overconstrain the inversion problem for critical atmospheric and source parameters. For reasonable data acquisition scenarios, simulations show source temperature errors of less than 1K should be possible. Tradeoffs between flight geometry, number of look angles,, and system signal-to-noise are given for typical parameter ranges.

Henderson, J.R.

1995-04-01T23:59:59.000Z

390

Low Power System Design Techniques for Mobile Computers  

E-Print Network (OSTI)

Portable products such as pagers, cordless and digital cellular telephones, personal audio equipment, and laptop computers are being used increasingly. Because these applications are battery powered, reducing power consumption is vital. In this report we first give the properties of low power design and techniques to exploit them on the hardware level such as: minimize capacitance, avoid wasteful activity, and reduce voltage and frequency. We will then elaborate on low power system-design techniques in which the main themes are to avoid wasteful activity at system level and to exploit locality of reference. Finally we review energy reduction techniques in the design of a wireless communication system, including system decomposition, communication and MAC protocols, and low power short range networks. 1 Introduction The requirement of portability of hand-held computers and portable devices places severe restrictions on size and power consumption. Even though battery technology is impr...

Paul J.M. Havinga; Gerard J. M. Smit

1997-01-01T23:59:59.000Z

391

Structures And Fabrication Techniques For Solid State Electrochemical Devices  

DOE Patents (OSTI)

Provided are low-cost, mechanically strong, highly electronically conductive porous substrates and associated structures for solid-state electrochemical devices, techniques for forming these structures, and devices incorporating the structures. The invention provides solid state electrochemical device substrates of novel composition and techniques for forming thin electrode/membrane/electrolyte coatings on the novel or more conventional substrates. In particular, in one embodiment the invention provides techniques for co-firing of device substrate (often an electrode) with an electrolyte or membrane layer to form densified electrolyte/membrane films 5 to 20 microns thick. In another embodiment, densified electrolyte/membrane films 5 to 20 microns thick may be formed on a pre-sintered substrate by a constrained sintering process. In some cases, the substrate may be a porous metal, alloy, or non-nickel cermet incorporating one or more of the transition metals Cr, Fe, Cu and Ag, or alloys thereof.

Visco, Steven J. (Berkeley, CA); Jacobson, Craig P. (El Cerrito, CA); DeJonghe, Lutgard C. (Lafayette, CA)

2005-12-27T23:59:59.000Z

392

Structures and fabrication techniques for solid state electrochemical devices  

DOE Patents (OSTI)

Provided are low-cost, mechanically strong, highly electronically conductive porous substrates and associated structures for solid-state electrochemical devices, techniques for forming these structures, and devices incorporating the structures. The invention provides solid state electrochemical device substrates of novel composition and techniques for forming thin electrode/membrane/electrolyte coatings on the novel or more conventional substrates. In particular, in one embodiment the invention provides techniques for co-firing of device substrate (often an electrode) with an electrolyte or membrane layer to form densified electrolyte/membrane films 5 to 20 microns thick. In another embodiment, densified electrolyte/membrane films 5 to 20 microns thick may be formed on a pre-sintered substrate by a constrained sintering process. In some cases, the substrate may be a porous metal, alloy, or non-nickel cermet incorporating one or more of the transition metals Cr, Fe, Cu and Ag, or alloys thereof.

Visco, Steven J. (Berkeley, CA); Jacobson, Craig P. (El Cerrito, CA); DeJonghe, Lutgard C. (Lafayette, CA)

2003-08-12T23:59:59.000Z

393

Digital Geologic Field Mapping Using Arcpad, In: Digital Mapping Techniques  

Open Energy Info (EERE)

Digital Geologic Field Mapping Using Arcpad, In: Digital Mapping Techniques Digital Geologic Field Mapping Using Arcpad, In: Digital Mapping Techniques '02- Workshop Proceedings Jump to: navigation, search OpenEI Reference LibraryAdd to library Report: Digital Geologic Field Mapping Using Arcpad, In: Digital Mapping Techniques '02- Workshop Proceedings Abstract Research into the practicality of digital mapping by Placer Dome Exploration identified hardware and software solutions to enhance the efficiency and accuracy of field work. The goal of the research was to find a lightweight hardware-software system that allows the user to build a digital map from field observations in much the same way as pen and paper methods. The focus of the research was to minimize the size and weight of computer systems. Systems identified consist of a wearable PC or handheld

394

Optical Fiber Technique for In-Reactor Mechanical Properties Measurement  

SciTech Connect

In-reactor measurement of material properties is required for a better understanding of radiation effects on materials. We present an optical fiber based technique for measuring changes in elastic properties which involves exciting and measuring flexural vibrations in a thin cantilever beam. By exciting the beam and measuring the natural frequency, changes in the modulus of elasticity can be monitored. The technique is demonstrated by monitoring the elastic property changes of a beam fabricated from copper, as the copper undergoes recrystallization at elevated temperature.

Robert S. Schley; Zilong Hua; David H. Hurley; Heng Ban

2012-07-01T23:59:59.000Z

395

Techniques in teaching statistics : linking research production and research use.  

SciTech Connect

In the spirit of closing the 'research-practice gap,' the authors extend evidence-based principles to statistics instruction in social science graduate education. The authors employ a Delphi method to survey experienced statistics instructors to identify teaching techniques to overcome the challenges inherent in teaching statistics to students enrolled in practitioner-oriented master's degree programs. Among the teaching techniques identi?ed as essential are using real-life examples, requiring data collection exercises, and emphasizing interpretation rather than results. Building on existing research, preliminary interviews, and the ?ndings from the study, the authors develop a model describing antecedents to the strength of the link between research and practice.

Martinez-Moyano, I .; Smith, A. (Decision and Information Sciences); (Univ. of Massachusetts at Boston)

2012-01-01T23:59:59.000Z

396

Condition Assessment Techniques for Laminar Dielectric Transmission Cable Systems  

Science Conference Proceedings (OSTI)

As aging and higher circuit loadings lead to increased failures of pipe-type cable systems, utilities need effective techniques for assessing the key components of these systems. Many off-line and on-line diagnostic and assessment techniques are in use to inspect the condition of laminar dielectric cable systems. However, because of the high labor costs and required circuit outage of off-line testing, much of the current research and development focuses on methods of on-line monitoring. A number of mecha...

2010-12-23T23:59:59.000Z

397

Hybrid Run-time Power Management Technique for Realtime  

E-Print Network (OSTI)

This paper presents a new run-time power management technique for real-time embedded systems which consist of a voltage scalable processor and power controllable peripheral devices. We have observed that there exist significant trade-offs in terms of energy consumption between the Dynamic Power Management (DPM) scheme and the Dynamic Voltage Scaling (DVS) scheme over a wide range of system operating conditions. The proposed technique fully exploits workload-variation slack time by partitioning the task into several timeslots and shut down the unneeded peripheral device on timeslot-by-timeslot basis.

Minyoung Kim; Embedded System With

2001-01-01T23:59:59.000Z

398

Corrosion inhibitor squeeze technique: laboratory adsorption-desorption studies  

SciTech Connect

Success of corrosion control in oil-well tubing by inhibitor squeeze technique depends on adsorption of inhibitor on reservoir rock and its slow desorption into produced fluids. This article describes laboratory investigations of adsorption-desorption phenomena. An analytical technique was developed for determination of corrosion inhibitor in the range of 0-25 ppm. Adsorptive capacities and adsorption characteristics of rock minerals found in reservoir formations were measured using several inhibitors. Irreversible chemisorption as well as reversible physical adsorption was observed, and significance of each is discussed. Desorption of inhibitor from consolidated sandstone was the type desired for protecting oil-well tubing. (20 refs.)

Kerver, J.K.; Morgan, F.A. III

1965-07-01T23:59:59.000Z

399

Hexahedral finite element mesh coarsening using pillowing technique  

SciTech Connect

A techniques for coarsening a hexahedral mesh is described. The technique includes identifying a coarsening region within a hexahedral mesh to be coarsened. A boundary sheet of hexahedral elements is inserted into the hexahedral mesh around the coarsening region. A column of hexahedral elements is identified within the boundary sheet. The column of hexahedral elements is collapsed to create an extraction sheet of hexahedral elements contained within the coarsening region. Then, the extraction sheet of hexahedral elements is extracted to coarsen the hexahedral mesh.

Staten, Matthew L. (Pittsburgh, PA); Woodbury, Adam C. (Provo, UT); Benzley, Steven E. (Provo, UT); Shepherd, Jason F. (Edgewood, NM)

2012-06-05T23:59:59.000Z

400

Statistical techniques for the characterization of partially observed epidemics.  

Science Conference Proceedings (OSTI)

Techniques appear promising to construct and integrate automated detect-and-characterize technique for epidemics - Working off biosurveillance data, and provides information on the particular/ongoing outbreak. Potential use - in crisis management and planning, resource allocation - Parameter estimation capability ideal for providing the input parameters into an agent-based model, Index Cases, Time of Infection, infection rate. Non-communicable diseases are easier than communicable ones - Small anthrax can be characterized well with 7-10 days of data, post-detection; plague takes longer, Large attacks are very easy.

Safta, Cosmin; Ray, Jaideep; Crary, David (Applied Research Associates, Inc, Arlington, VA); Cheng, Karen (Applied Research Associates, Inc, Arlington, VA)

2010-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "techniques drilling techniques" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Determining Plutonium Mass in Spent Fuel with Nondestructive Assay Techniques -- Preliminary Modeling Results Emphasizing Integration among Techniques  

Science Conference Proceedings (OSTI)

There are a variety of motivations for quantifying Pu in spent (used) fuel assemblies by means of nondestructive assay (NDA) including the following: strengthen the capabilities of the International Atomic Energy Agencies to safeguards nuclear facilities, quantifying shipper/receiver difference, determining the input accountability value at reprocessing facilities and providing quantitative input to burnup credit determination for repositories. For the purpose of determining the Pu mass in spent fuel assemblies, twelve NDA techniques were identified that provide information about the composition of an assembly. A key point motivating the present research path is the realization that none of these techniques, in isolation, is capable of both (1) quantifying the elemental Pu mass of an assembly and (2) detecting the diversion of a significant number of pins. As such, the focus of this work is determining how to best integrate 2 or 3 techniques into a system that can quantify elemental Pu and to assess how well this system can detect material diversion. Furthermore, it is important economically to down-select among the various techniques before advancing to the experimental phase. In order to achieve this dual goal of integration and down-selection, a Monte Carlo library of PWR assemblies was created and is described in another paper at Global 2009 (Fensin et al.). The research presented here emphasizes integration among techniques. An overview of a five year research plan starting in 2009 is given. Preliminary modeling results for the Monte Carlo assembly library are presented for 3 NDA techniques: Delayed Neutrons, Differential Die-Away, and Nuclear Resonance Fluorescence. As part of the focus on integration, the concept of"Pu isotopic correlation" is discussed and the role of cooling time determination.

Tobin, S. J.; Fensin, M. L.; Ludewigt, B. A.; Menlove, H. O.; Quiter, B. J.; Sandoval, N. P.; Swinhoe, M. T.; Thompson, S. J.

2009-08-03T23:59:59.000Z

402

SSRL Beam Lines by Technique | Stanford Synchrotron Radiation Lightsource  

NLE Websites -- All DOE Office Websites (Extended Search)

Technique Technique SSRL Beam Line Map | Beam Lines by Number | SPEAR3 Parameters Supported Technique(s) Beam Line X-ray Absorption Spectroscopy Biological x-ray absorption spectroscopy 4-3, 7-3, 9-3, 14-3 Materials / catalysis / chemistry x-ray absorption spectroscopy 4-1, 4-3, 11-2, 14-3 MEIS x-ray absorption spectroscopy 4-1, 4-3, 11-2, 14-3 X-ray absorption spectroscopy imaging 2-3, 6-2a, 10-2a,14-3 Single crystal x-ray absorption spectroscopy 9-3 Grazing incidence x-ray absorption spectroscopy 11-2 Tender x-ray absorption spectroscopy 4-3, 14-3 Tender x-ray absorption spectroscopy imaging 14-3 Photoemission spectroscopy 8-1a, 8-1b, 8-2, 10-1, 13-2 X-ray absorption spectroscopy, near edge, soft energy 8-2, 10-1, 13-2 Elliptic polarization, soft energy photoemission spectroscopy 13-2

403

Gerald S. Frankel1 Electrochemical Techniques in Corrosion: Status,  

E-Print Network (OSTI)

of electrochemical methods. Interested readers are referred to other works. Instead, the focus tank holding liquid radio- active waste at the Hanford Site 30 . A probe made from a thick. For a system such as Fe in sulfuric acid, all of the electrochemical techniques work quite well

404

Prof.dr. Nico Groenendijk Financing Techniques for  

E-Print Network (OSTI)

This report is also included in the printed REVIT compendium, Part "New financing techniques, public private in brownfield redevelopment 7 4. Four models of public-private cooperation in brownfield redevelopment 12 5 into the major economic potential that brownfields represent. Section 4 discusses four models of public-private

Twente, Universiteit

405

Radiation induced strand breakage analyzed by tunel technique  

E-Print Network (OSTI)

The objective of this research is to fully characterize the effectiveness and limits of using the terminal deoxynucleotidyl transferase mediated biotin-dUTP nick end labeling (TUNEL) technique for analysis of radiation induced strand breakage. If the TUNEL technique is found valuable, it could be applied to develop a biodosimetry protocol, primarily useful for individuals exposed in radiological accidents. Several techniques currently in use include fluorescent in-situ hybridization, the comet assay and the dicentric assay, yet each has drawbacks such as limited sensitivity or considerable preparation time. Recently, the TUNEL assay has been used in studies by Harvey and Ford (1997) to investigate chromatid breaks due to restriction enzymes. This research uses similar protocols to examine breaks due to radiation. Chinese hamster ovary (CHO) cells were cultured and exposed to X rays, receiving a dose ranging from 0 to 2 Gy. Slides were created using a standard metaphase chromosome preparation technique, followed by the TUNEL reaction to highlight chromosome breaks. The results were used to build a dose response curve. Although the expected increase in TUNEL positives per metaphase cell with increased x-ray dose was seen, large errors were associated with the results rendering TUNEL assay less than ideal for biodosimetry purposes. Additionally, TUNEL is not very effective at high doses because each TUNEL positive becomes indistinguishable from neighboring positives due to the high number of positives on each chromosome.

Reynolds, Marissa Dawn

2003-01-01T23:59:59.000Z

406

Innovative Exploration Techniques for Geothermal Assessment at Jemez  

Open Energy Info (EERE)

Exploration Techniques for Geothermal Assessment at Jemez Exploration Techniques for Geothermal Assessment at Jemez Pueblo, New Mexico Geothermal Project Jump to: navigation, search Last modified on July 22, 2011. Project Title Innovative Exploration Techniques for Geothermal Assessment at Jemez Pueblo, New Mexico Project Type / Topic 1 Recovery Act: Geothermal Technologies Program Project Type / Topic 2 Validation of Innovative Exploration Technologies Project Description This collaborative project will perform the following tasks to fully define the nature and extent of the geothermal reservoir underlying the Jemez Reservation: - Conduct 1-6,000-scale geologic mapping of 6 mi2 surrounding the Indian Springs area. - Using the detailed geologic map, locate one N-S and two E-W seismic lines and run a seismic survey of 4 mi2; reduce and analyze seismic data using innovative high-resolution seismic migration imaging techniques developed by LANL, and integrate with 3-D audio-frequency MT/MT data acquired at the same area for fault and subsurface structure imaging and resource assessment.

407

Surgical implantation techniques for electronic tags in fish  

Science Conference Proceedings (OSTI)

Intracoelomic implantation of transmitters into fish requires making a surgical incision, incision closure, and other surgery related techniques; however, the tools and techniques used in the surgical process vary widely. We review the available literature and focus on tools and techniques used for conducting surgery on juvenile salmonids because of the large amount of research that is conducted on them. The use of sterilized surgical instruments properly selected for a given size of fish will minimize tissue damage and infection rates, and speed the wound healing of fish implanted with transmitters. For the implantation of transmitters into small fish, the optimal surgical methods include making an incision on the ventral midline along the linea alba (for studies under 1 month), protecting the viscera (by lifting the skin with forceps while creating the incision), and using absorbable monofilament suture with a small-swaged-on swaged-on tapered or reverse-cutting needle. Standardizing the implantation techniques to be used in a study involving particular species and age classes of fish will improve survival and transmitter retention while allowing for comparisons to be made among studies and across multiple years. This review should be useful for researchers working on juvenile salmonids and other sizes and species of fish.

Wagner, Glenn N.; Cooke, Steven J.; Brown, Richard S.; Deters, Katherine A.

2011-01-01T23:59:59.000Z

408

Modified MFCC windowed technique for speaker word recognition  

Science Conference Proceedings (OSTI)

Mel frequency cepstral coefficients (MFCCs) are one of the most popular forms of parameterization of the speech signal in speaker word recognition systems. MFCC's are based on the known variation of the human ear's critical bandwidths. In this paper, ... Keywords: DCT, MFCC, hamming window, kaiser window, modified MFCC, speaker word recognition, windowing techniques

I. Patel; Y. S. Rao

2011-02-01T23:59:59.000Z

409

Development of Improved Oil Field Waste Injection Disposal Techniques  

Science Conference Proceedings (OSTI)

The goals of this DOE sponsored project are to: (1) assemble and analyze a comprehensive database of past waste injection operations; (2) develop improved diagnostic techniques for monitoring fracture growth and formation changes; (3) develop operating guidelines to optimize daily operations and ultimate storage capacity of the target formation; and (4) to test these improved models and guidelines in the field.

Terralog Technologies USA Inc.

2001-12-17T23:59:59.000Z

410

Yet Another Fault Injection Technique : by Forward Body Biasing Injection  

E-Print Network (OSTI)

expensive fault injection tech- niques, like clock or voltage glitches, are well taken into accountYet Another Fault Injection Technique : by Forward Body Biasing Injection K. TOBICH1,2, P. MAURINE1 Injection, Electromag- netic Attacks, RSA, Chinese Remainder Theorem 1 Introduction Fault injection

411

Computationally Simple Battery Management Techniques for Wireless Nodes  

E-Print Network (OSTI)

Computationally Simple Battery Management Techniques for Wireless Nodes Maria Adamou 1 and Saswati In this paper, we investigate di#11;erent battery management policies for a wireless node. The goal is to increase the lifetime of a node by exploiting its battery characteristics. We have presented a framework

Sarkar, Saswati

412

Applying Bayesian Network Techniques to Prioritize Lean Six Sigma Efforts  

Science Conference Proceedings (OSTI)

In order to retain competitive advantages, many manufacturing organizations have applied Lean Six Sigma techniques to improve production processes. The general approach for implementing Lean Six Sigma is to perform various projects to tackle specific ... Keywords: Bayesian Network, Cause-and-Effect Relationships, Events of Interest, Lean, Probabilistic Inference, Six Sigma

Yanzhen Li, Rapinder S. Sawhne, Joseph H. Wilck

2013-04-01T23:59:59.000Z

413

Current literature in computer graphics and interactive techniques: references  

Science Conference Proceedings (OSTI)

The purpose of the References and Reviews Department is to collect and to disseminate rapidly as many publication citations of interest as come to the attention of the editor. Areas of interest cover all aspects of Computer Graphics and Interactive Techniques, ...

G. F. Schrack

1980-02-01T23:59:59.000Z

414

Posterior Sampling using Particle Swarm Optimizers and Model Reduction Techniques  

Science Conference Proceedings (OSTI)

Inverse problems are ill-posed and posterior sampling is a way of providing an estimate of the uncertainty based on a finite set of the family of models that fit the observed data within the same tolerance. Monte Carlo methods are used for this purpose ... Keywords: High Dimensional Spaces, Inverse Problems, Model Reduction Techniques, Particle Swarm, Posterior Sampling

J. L. Fernández Martínez; E. García Gonzalo; Z. Fernández Muńiz; G. Mariethoz; T. Mukerji

2010-07-01T23:59:59.000Z

415

Enhancing Text Retrieval by Using Advanced Stylistic Techniques  

Science Conference Proceedings (OSTI)

Text retrieval techniques have long focused on the topic of texts rather than the pragmatic role they play per se. In this article, we address two other aspects in text processing that could enhance text retrieval: (a) the detection of functional style ... Keywords: empirical methods, functional style, natural language processing, pragmatic aspects, text retrieval, topic disambiguation, writer"s attitude

S. E. Michos; N. Fakotakis; G. Kokkinakis

1999-10-01T23:59:59.000Z

416

An analysis of some time-sharing techniques  

Science Conference Proceedings (OSTI)

The effectiveness of certain time-sharing techniques such as program relocation, disk rotational delay minimization, and swap volume minimization is investigated. Summary data is presented, and the findings are discussed. The vehicle for this investigation ... Keywords: B6500, bulk core usage, operating system model, relocation, rotational delay minimization, simulation, swap volume minimization, system simulation, time-sharing

Norman R. Nielsen

1971-02-01T23:59:59.000Z

417

Computational intelligence techniques: a study of scleroderma skin disease  

Science Conference Proceedings (OSTI)

This paper presents an analysis of microarray gene expression data from patients with and without scleroderma skin disease using computational intelligence and visual data mining techniques. Virtual reality spaces are used for providing unsupervised ... Keywords: Scleroderma disease, clustering, differential evolution, genetic programming, genomics, grid computing, hybrid evolutionary-classical optimization, particle swarm optimization, rough sets, similarity structure preservation, virtual reality spaces, visual data mining

Julio J. Valdes; Alan J. Barton

2007-07-01T23:59:59.000Z

418

Exploring underwater target detection by imaging polarimetry and correlation techniques  

E-Print Network (OSTI)

1 Exploring underwater target detection by imaging polarimetry and correlation techniques M *Corresponding author: ayman.al-falou@isen.fr Underwater target detection is investigated by combining active. This experimentally study illustrates the potential of polarization imaging for underwater target detection and opens

Paris-Sud XI, Université de

419

Automatic thumbnail extraction for DVR based on production technique estimation  

Science Conference Proceedings (OSTI)

The automatic recording function of DVR is a powerful tool for users. However, increase of the stored content makes it difficult to access desired content. To solve this issue, this paper proposes a new method of providing suitable thumbnails of TV programs ... Keywords: DVR, STB, Object detection, Production technique estimation

T. Takahashi; M. Sugano; S. Sakazsawa

2010-05-01T23:59:59.000Z

420

Development of Improved Oil Field Waste Injection Disposal Techniques  

Science Conference Proceedings (OSTI)

The goals of this project have was to: (1) assemble and analyze a comprehensive database of past waste injection operations; (2) develop improved diagnostic techniques for monitoring fracture growth and formation changes; (3) develop operating guidelines to optimize daily operations and ultimate storage capacity of the target formation; and (4) to apply these improved models and guidelines in the field.

Terralog Technologies

2002-11-25T23:59:59.000Z

Note: This page contains sample records for the topic "techniques drilling techniques" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Final Report on Isotope Ratio Techniques for Light Water Reactors  

SciTech Connect

The Isotope Ratio Method (IRM) is a technique for estimating the energy or plutonium production in a fission reactor by measuring isotope ratios in non-fuel reactor components. The isotope ratios in these components can then be directly related to the cumulative energy production with standard reactor modeling methods.

Gerlach, David C.; Gesh, Christopher J.; Hurley, David E.; Mitchell, Mark R.; Meriwether, George H.; Reid, Bruce D.

2009-07-01T23:59:59.000Z

422

Literature Survey of Crossarm Inspection Tools and Techniques  

Science Conference Proceedings (OSTI)

Maintaining the electric power industry's aging transmission system presents an ongoing challenge, but little work has been done to specifically address the inspection of wood, steel, or fiberglass crossarms. This report identifies and describes inspection techniques for the wood and steel crossarms used in transmission systems. It covers potential or emerging technologies as well as commercially available methods.

2009-12-23T23:59:59.000Z

423

EELE408 Photovoltaics Lecture 16: Silicon Solar Cell Fabrication Techniques  

E-Print Network (OSTI)

1 EELE408 Photovoltaics Lecture 16: Silicon Solar Cell Fabrication Techniques Dr. Todd J. Kaiser - Bozeman Screen Printed Solar Cells · Starting wafer is about 0.5 mm thick and 10 x 10 cm2. The wafer is p-type and lightly doped with Boron (1016/cm3) 2 Screen Printed Solar Cells · Saw Damage Etch ­ The starting wafer

Kaiser, Todd J.

424

RF Cherenkov picosecond timing technique for high energy physics applications  

Science Conference Proceedings (OSTI)

The Cherenkov time-of-propagation (TOP) detector and Cherenkov time-of-flight (TOF) detector in a ?head-on? geometry based on the recently proposed time measuring technique with radio frequency (RF) phototube are considered. Results of the Monte Carlo simulations are presented.

Margaryan, Amur; Hashimoto, Osamu; Majewski, Stanislaw; Tang, Liguang

2008-09-01T23:59:59.000Z

425

Learning to search: Functional gradient techniques for imitation learning  

Science Conference Proceedings (OSTI)

Programming robot behavior remains a challenging task. While it is often easy to abstractly define or even demonstrate a desired behavior, designing a controller that embodies the same behavior is difficult, time consuming, and ultimately expensive. ... Keywords: Autonomous navigation, Functional gradient techniques, Grasping, Imitation learning, Nonparametric optimization, Planning, Quadrupedal locomotion, Robotics, Structured prediction, Subgradient methods

Nathan D. Ratliff; David Silver; J. Andrew Bagnell

2009-07-01T23:59:59.000Z

426

Review: A review of advanced techniques for detecting plant diseases  

Science Conference Proceedings (OSTI)

Diseases in plants cause major production and economic losses in agricultural industry worldwide. Monitoring of health and detection of diseases in plants and trees is critical for sustainable agriculture. To the best of our knowledge, there is no sensor ... Keywords: GC-MS, Imaging techniques, Plant diseases, Spectroscopy, Volatile profiling

Sindhuja Sankaran; Ashish Mishra; Reza Ehsani; Cristina Davis

2010-06-01T23:59:59.000Z

427

Pulse-to-Pulse Coherent Doppler Sonar Signal Processing Techniques  

Science Conference Proceedings (OSTI)

In this paper we present and discuss techniques for the computation of the mean and spectral variance of a pulse-to-pulse coherent sonar signal, leading to the measurement of mean water velocity and turbulence. The use of an autocovariance ...

Roger Lhermitte; Robert Serafin

1984-12-01T23:59:59.000Z

428

Forward pruning and other heuristic search techniques in tsume go  

E-Print Network (OSTI)

of years. In this paper we give an overview of techniques that are used in the heuristic search reaching. A global causal interdependence is added through the ko­rule which makes the outcome of a local positions is too big to be stored in any form (with 361 fields being either empty, white or black an upper

Wolf, Thomas

429

Comparing free-hand Menu Techniques for Distant Displays  

E-Print Network (OSTI)

Comparing free-hand Menu Techniques for Distant Displays Linear-, Marking- and Finger-Counting Menu's the Idea? Free-hand menu selection on distant displays l Free-hand: no Instrumentation, no touch l Distant-Counting Exploration " " Eyes-free " " Direct Selection " Hierarchy Size * * 5^2 #12;24 How would people express Finger

Bailly, Gilles

430

Information Leakage via Electromagnetic Emanation and Effectiveness of Averaging Technique  

Science Conference Proceedings (OSTI)

It is well known that there is relationship between electromagnetic emanation and processing information in IT devices such as personal computers and smart cards. In this paper, we show how to estimate amount of information that is leaked as electromagnetic ... Keywords: Tempest, Channel capacity, electromagnetic emanation, averaging technique

Hidema Tanaka

2008-04-01T23:59:59.000Z

431

Mutation Sampling Technique for the Generation of Structural Test Data  

E-Print Network (OSTI)

Our goal is to produce validation data that can be used as an efficient (pre) test set for structural stuck-at faults. In this paper, we detail an original test-oriented mutation sampling technique used for generating such data and we present a first evaluation on these validation data with regard to a structural test.

Scholive, M; Robach, C; Flottes, M L; Rouzeyre, B

2011-01-01T23:59:59.000Z

432

Focus Windows: A New Technique for Proof Presentation ?  

E-Print Network (OSTI)

Focus Windows: A New Technique for Proof Presentation ? Florina Piroi and Bruno Buchberger Research{links that display the referenced formula in a small auxiliary window; nested brackets at the right{hand margin make Theorema provers. Focus windows provide means to overcome this diĂ?culty. The idea of focus windows

433

A comparison of automation techniques for optimization of compressor scheduling  

Science Conference Proceedings (OSTI)

Compressor selection is one of the primary functions in operation of natural gas pipelines, and a major concern of the task is to minimize operating costs. This study presents a comparison of three automation techniques for compressor selection: mixed ... Keywords: Compressor selection optimization, Expert system, Genetic algorithms, Mixed integer linear programming

H. H. Nguyen; V. Uraikul; C. W. Chan; P. Tontiwachwuthikul

2008-03-01T23:59:59.000Z

434

Scalable techniques for document identifier assignment in inverted indexes  

Science Conference Proceedings (OSTI)

Web search engines depend on the full-text inverted index data structure. Because the query processing performance is so dependent on the size of the inverted index, a plethora of research has focused on fast end effective techniques for compressing ... Keywords: documentID reassignment, index compression

Shuai Ding; Josh Attenberg; Torsten Suel

2010-04-01T23:59:59.000Z

435

Scheduling Techniques for Synchronous and Multidimensional Synchro-nous Dataflow  

E-Print Network (OSTI)

by Praveen Kumar Murthy Doctor of Philosophy in Electrical Engineering and Computer Science University memory usage of the schedule; in this thesis, we develop techniques that jointly minimize for code size, a signal sampled on a non-rectangular lattice can have a lower sampling density than one sampled

California at Berkeley, University of

436

Scheduling Techniques for Synchronous and Multidimensional Synchro nous Dataflow  

E-Print Network (OSTI)

by Praveen Kumar Murthy Doctor of Philosophy in Electrical Engineering and Computer Science University memory usage of the schedule; in this thesis, we develop techniques that jointly minimize for code size, a signal sampled on a non­rectangular lattice can have a lower sampling density than one sampled

California at Berkeley, University of

437

Ge epitaxial refill deposition techniques for fabricating pedestal transistor structures  

Science Conference Proceedings (OSTI)

An etch-epitaxial refill technique is described for the fabrication of integrated high-speed Ge transistor structures having a pedestal configuration. The device areas surrounding 0.1 ohm-cm mesa structures were refilled with Ge having a resistivity ...

V. J. Silvestri; T. B. Light; H. N. Yu; A. Reisman

1972-01-01T23:59:59.000Z

438

Drill report  

SciTech Connect

North Slope drilling activity is described. As of November 14, 1984, four rigs were actively drilling in the Kuparuk River field with another two doing workovers. Only one rig was drilling in the Prudhoe Bay field, with another doing workovers and one on standby.

Not Available

1984-12-01T23:59:59.000Z

439

Investigative Tools and Techniques for Indoor Air Quality Studies  

E-Print Network (OSTI)

Indoor air quality problems are diverse and often complex. Adverse indoor air quality problems can exist which create symptomatic conditions for building occupants. Often, the exact cause, or causes, of the substandard indoor air quality are unknown. Therefore, an investigative approach must usually be taken to identify the source(s) of the air quality problem, and if present, air contaminant concentrations. As the general public becomes more aware of the problems associated with poor indoor air quality conditions, an associated increase in air quality evaluation requests can be expected. This paper discusses some of the various investigative tools and techniques that can be utilized to identify air quality contaminants when performing an indoor air quality evaluation. These investigative tools and techniques can be used to develop a site specific list of possible contaminants and their sources, and can then be used to determine which contaminants are, in fact, present in adverse concentrations. Some of the investigative tools and techniques to be discussed in this paper include the following: visual inspections and site observations, information searches, review of building construction, review of ventilation systems, interviews, low and high volume sampling pumps, flow and oxygen meters, portable photoionization and flame ionization detectors (PID & FID), various types of vapor detector tubes, and gas chromatograph/mass spectrophotometer (GC/MS) analysis. This paper will be an introductory overview of the above listed investigative tools and techniques. The paper's attempt is to acquaint the reader with these investigative tools and techniques, and how they can assist the reader in an air quality evaluation.

Kennedy, S. R.; Quinn, C. B.; Henderson, J. E.; Vickery, R. G.

1994-01-01T23:59:59.000Z

440

Damage tolerance of well-completion and stimulation techniques in coalbed methane reservoirs  

SciTech Connect

Coalbed methane (CBM) reservoirs are characterized as naturally fractured, dual porosity, low permeability, and water saturated gas reservoirs. Initially, the gas, water and coal are at thermodynamic equilibrium under prevailing reservoir conditions. Dewatering is essential to promote gas production. This can be accomplished by suitable completion and stimulation techniques. This paper investigates the efficiency and performance of the openhole cavity, hydraulic fractures, frack and packs, and horizontal wells as potential completion methods which may reduce formation damage and increase the productivity in coalbed methane reservoirs. Considering the dual porosity nature of CBM reservoirs, numerical simulations have been carried out to determine the formation damage tolerance of each completion and, stimulation approach. A new comparison parameter named as the normalized productivity index is defined as the ratio of the productivity index of a stimulated well to that of a nondamaged vertical well as a function of time. Typical scenarios have been considered to evaluate the CBM properties, including reservoir heterogeneity, anisotropy, and formation damage, for their effects on this index over the production time. The results for each stimulation technique show that the value of the index declines over the time of production with a rate which depends upon the applied technique and the prevailing reservoir conditions. The results also show that horizontal wells have the best performance if drilled orthogonal to the butt cleats. Open-hole cavity completions outperform vertical fractures if the fracture conductivity is reduced by any damage process. When vertical permeability is much lower than horizontal permeability, production of vertical wells will improve while productivity of horizontal wells will decrease.

Jahediesfanjani, H.; Civan, F. [University of Oklahoma, Norman, OK (United States)

2005-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "techniques drilling techniques" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Techniques and Technologies for Field Detection of Asbestos Containing Materials  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

DOE-Environmental Management DOE-Complex Wide Techniques and Technologies for Field Detection of Asbestos Containing Materials Challenge Asbestos has been used in numerous applications at DOE sites including sprayed-on fireproofing, asphalt and vinyl floor tile, and asbestos-cement (transite) siding. Inhalation of asbestos can result in non-malignant asbestosis, lung cancer and mesothelioma in workers. Currently, 40 CFR 763, Subpart E requires a certain number of bulk samples of suspected asbestos-containing material (ACM) to be collected within each designated homogeneous area (HA). If real time (or near-real), in-situ detection techniques/technologies of ï‚Ł 5, and preferably ï‚Ł 3 weight percent asbestos, were available, sample numbers

442

THERMOANALYTICAL TECHNIQUES P. J. Nigrey O S T I  

Office of Scientific and Technical Information (OSTI)

THERMOANALYTICAL TECHNIQUES THERMOANALYTICAL TECHNIQUES \ P. J. Nigrey O S T I Sandia National Laboratories, Department 6342MS0717, Albuquerque, NM 87 185-07 17 SUMMARY In this study, Thermogravimetric Analysis (TGA) has been used to study silicone, Viton and Ethylene Propylene (EPDM) rubber. The studies have shown that TGA accurately predicts the relative order of thermo-oxidative stability of these three materials from the calculated -activation energies. As expected, the greatest thermal stability was found in silicone rubber followed by Viton and EPDM rubber. The calculated lifetimes for these materials were i n relatively close agreement with published values. The preliminary results also accurately reflect decreased thermal stability and lifetime for EPDM rubber exposed to radiation and

443

TECHNIQUES AND CAPABILITIES APPLICATIONS SPECIFIC PROJECTS / ADDITIONAL INFORMATION  

NLE Websites -- All DOE Office Websites (Extended Search)

TECHNIQUES AND CAPABILITIES TECHNIQUES AND CAPABILITIES APPLICATIONS SPECIFIC PROJECTS / ADDITIONAL INFORMATION * Source: 2 ID - EPU 105 (3 m, PM , 20-200 eV) EPU 56 (3 m PM, 200-2000 eV) * High-Resolution Angular Resolved Photoemission Scanning Microscopy (”-ARPES): 20-1500 eV, 1 ”m, < 1 meV, <0.1 o , 5-2000 K * Ambient Pressure Scanning Photoelectron Microscopy (AP- SPEM): 200-1800 eV, < 300 nm, 10 +3 Torr * Low-Energy Electron Microscopy & X-ray Photoemission Electron Microscopy (LEEM/XPEEM): 20 - 1800 eV, < 10 nm, high- transmission aberration correction ”-SP-ARPES: Momentum-resolved electronic structurelectronic bands of magnetic materials and non- magnetic materials with le of solids; spin-polarized arge spin-orbit interaction; a 1 ”m spot from NSLS-

444

SCUBA TECHNIQUES USED IN RISK ASSESSMENT OF POSSIBLE NUCLEAR  

Office of Legacy Management (LM)

SCUBA TECHNIQUES USED IN RISK ASSESSMENT OF POSSIBLE NUCLEAR SCUBA TECHNIQUES USED IN RISK ASSESSMENT OF POSSIBLE NUCLEAR LEAKAGE AROUND AMCHITKA ISLAND, ALASKA Stephen Jewett, Max Hoberg, Heloise Chenelot, Shawn Harper Institute of Marine Science, University of Alaska Fairbanks, Fairbanks, AK 99775-7220 Joanna Burger Division of Life Sciences, Consortium for Risk Evaluation with Stakeholder Participation (CRESP), and Environmental and Occupational Health Sciences Institute (EOHSI), 604 Allison Road, Rutgers University, Piscataway, New Jersey 08854-8082 Michael Gochfeld, CRESP and EOHSI, UMDNJ-Robert Wood Johnson Medical School, Piscataway, New Jersey 08854 Abstract Amchitka Island, in the Aleutians, had three underground nuclear tests (1 965 to 1971) ranging from approximately 80 kilotons to 5 megatons. Initial surveys (1960s-1970s) did

445

Imaging Techniques for Relativistic Beams: Issues and Limitations  

Science Conference Proceedings (OSTI)

Characterizations of transverse profiles for low-power beams in the accelerators of the proposed linear colliders (ILC and CLIC) using imaging techniques are being evaluated. Assessments of the issues and limitations for imaging relativistic beams with intercepting scintillator or optical transition radiation screens are presented based on low-energy tests at the Fermilab A0 photoinjector and are planned for the Advanced Superconducting Test Accelerator at Fermilab. We have described several of the issues and limitations one encounters with the imaging of relativistic electron beams. We have reported our initial tests at the A0PI facility and our plans to extend these studies to the GeV scale at the ASTA facility. We also have plans to test these concepts with 23-GeV beams at the FACET facility at SLAC in the coming year. It appears the future remains bright for imaging techniques in ILC-relevant parameter space.

Lumpkin, Alex H.; Wendt, Manfred; /Fermilab

2012-02-01T23:59:59.000Z

446

ARM - Publications: Science Team Meeting Documents: A Bootstrap Technique  

NLE Websites -- All DOE Office Websites (Extended Search)

A Bootstrap Technique for Testing the Relationship between Local-Scale A Bootstrap Technique for Testing the Relationship between Local-Scale Radar Observations of Cloud Occurrence and Large-Scale Atmospheric Fields Marchand, Roger Pacific Northwest National Laboratory Beagley, Nathaniel Pacific Northwest National Laboratory Ackerman, Thomas DOE/Pacific Northwest National Laboratory Limitations in the ability of Global Climate Models (GCMs) to predict clouds create significant uncertainties in predicting and understanding climate. Comparison studies have demonstrated that clouds are among the largest source of uncertainty in global climate model simulations [Cess et al., 1990; Potter and Cess, 2003]. Comparisons of model output and observational data generally require averaging (or aggregating) the observations in an attempt to put them on the same large spatial scale as

447

Techniques for Debugging Parallel Programs with Flowback Analysis  

E-Print Network (OSTI)

Flowback analysis is a powerful technique for debugging programs. It allows the programmer to examine dynamic dependences in a program's execution history without having to re-execute the program. The goal is to present to the programmer a graphical view of the dynamic program dependences. We are building a system, called PPD, that performs flowback analysis while keeping the execution time overhead low. We also extend the semantics of flowback analysis to parallel programs. This paper describes details of the graphs and algorithms needed to implement efficient flowback analysis for parallel programs. Execution time overhead is kept low by recording only a small amount of trace during a program's execution. We use semantic analysis and a technique called incremental tracing to keep the time and space overhead low. As part of the semantic analysis, PPD uses a static program dependence graph structure that reduces the amount of work done at compile time and takes advantage of the dynamic...

Jong-deok Choi; Barton P. Miller; Robert H.B. Netzer

1991-01-01T23:59:59.000Z

448

Diagnostic technique for monitoring high temperature plasma dynamics  

Science Conference Proceedings (OSTI)

A preliminary design for the adaptation of a pinhole experiment (PINEX) technique to the monitoring of the dynamics of high temperature plasmas is described. Specifically, this imaging technique uses a thick aperture, an efficient radiation converter, and highly intensified television cameras to provide real-time viewing of radiation sources such as the neutron emissions from d-d and d-t fusion reactions in controlled thermonuclear research devices. The neutron emission strengths, R approx. 5 x 10/sup 15/ n/s, recently achieved at the Tokamak Fusion Test Reactor (TFTR) and the Joint European Torus (JET) should be sufficient for 3 to 6-cm spatial resolution and 10 to 100-ms time resolution using such a system. Such information should be useful for on-line optimization of the plasma and for quantitative evaluation of its performance.

Lumpkin, A.H.; Pappas, D.S.

1987-06-01T23:59:59.000Z

449

A study of discrete and continuum joint modeling techniques  

SciTech Connect

This paper presents the results of a numerical and experimental study in which finite element and discrete element techniques were used to analyze a layered polycarbonate plate model subjected to uniaxial compression. Also, the two analysis techniques were used to compute the response of an eight meter diameter drift in jointed-rock. The drift was subjected to in-situ and far-field induced thermal stresses. The finite element analyses used a continuum rock model to represent the jointed-rock. A comparison of the analyses showed that the finite element continuum joint model consistently predicted less joint slippage than did the discrete element analyses, although far-field displacements compared well.

Jung, J.; Brown, S.R.

1992-05-01T23:59:59.000Z

450

Glow discharge techniques for conditioning high vacuum systems  

DOE Green Energy (OSTI)

A review is given of glow discharge techniques which are useful for conditioning vacuum vessels for high vacuum applications. Substantial development of glow discharge techniques has been done for the purpose of in-situ conditioning of the large ultrahigh vacuum systems for particle accelerators and magnetic fusion devices. In these applications the glow discharge treatments remove impurities from vessel surfaces in order to minimize particle-induced desorption coefficients. Cleaning mechanisms involve a mixture of sputtering and ion- (or neutral) induced desorption effects depending on the gas mixture (ArO/sub 2/ vs. H/sub 2/) and excitation method (DC, RF, and ECR). The author will review the methodology of glow discharge conditioning, diagnostic measurements provided by residual gas and surface composition analysis, and applications to vessel conditioning and materials processing. 76 refs., 16 figs.

Dylla, H.F.

1988-03-01T23:59:59.000Z

451

The role of fluctuations in atmospheric Cerenkov technique  

E-Print Network (OSTI)

In the absence of a standard source of gamma rays or hadrons of known energy one has to study the details of production of \\v Cerenkov light at the observation level only through detailed simulation studies. Recently such studies have become all the more important in view of the various techniques resulting from such studies, to distinguish between gamma ray initiated events from those generated by much more abundant hadronic component of cosmic rays. We have carried out a detailed simulation studies using the CORSIKA package in order to study the Cerenkov photon density fluctuations at various core distances both for photon and proton primaries incident vertically at the top of the atmosphere. It is found that the density fluctuations are significantly non-statistical. Such fluctuations are much more pronounced in the case of proton primaries as compared to photon primaries at all energies. Several statistical parameters have been computed some which might lead to a technique in distinguishing photon primaries.

P. N. Bhat

1997-06-03T23:59:59.000Z

452

New Technique for Proposing Network's Topology using GPS and GIS  

E-Print Network (OSTI)

The problem of proposed topology for network comes when using Prim's algorithm with default distance (unrealistic distances) between network's nodes and don't care about the lakes, high hills, buildings, etc. This problem will cause incorrect estimations for cost (budget) of requirements like the media (optic fibre) and the number or type of Access-points, regenerator, Optic Amplifier, etc. This paper proposed a new technique of implementing Prim's algorithm to obtain realistic topology using realistic distances between network's nodes via Global Positioning System GPS and Geographic Information Systems GIS packages. Applying the new technique on academic institutes network of Erbil city from view of media (optic fibre) shows that there is disability in cost (budget) of the media which is needed (nearly) 4 times if implement default Prim's algorithm (don't using GPS & GIS) base on unrealistic distances between the nodes.

Ismaeel, Ayad Ghany

2012-01-01T23:59:59.000Z

453

On the selection of dimension reduction techniques for scientific applications  

Science Conference Proceedings (OSTI)

Many dimension reduction methods have been proposed to discover the intrinsic, lower dimensional structure of a high-dimensional dataset. However, determining critical features in datasets that consist of a large number of features is still a challenge. In this paper, through a series of carefully designed experiments on real-world datasets, we investigate the performance of different dimension reduction techniques, ranging from feature subset selection to methods that transform the features into a lower dimensional space. We also discuss methods that calculate the intrinsic dimensionality of a dataset in order to understand the reduced dimension. Using several evaluation strategies, we show how these different methods can provide useful insights into the data. These comparisons enable us to provide guidance to a user on the selection of a technique for their dataset.

Fan, Y J; Kamath, C

2012-02-17T23:59:59.000Z

454

Advanced Techniques for Power System Identification from Measured Data  

SciTech Connect

Time-synchronized measurements provide rich information for estimating a power-system's electromechanical modal properties via advanced signal processing. This information is becoming critical for the improved operational reliability of interconnected grids. A given mode's properties are described by its frequency, damping, and shape. Modal frequencies and damping are useful indicators of power-system stress, usually declining with increased load or reduced grid capacity. Mode shape provides critical information for operational control actions. This project investigated many advanced techniques for power system identification from measured data focusing on mode frequency and damping ratio estimation. Investigators from the three universities coordinated their effort with Pacific Northwest National Laboratory (PNNL). Significant progress was made on developing appropriate techniques for system identification with confidence intervals and testing those techniques on field measured data and through simulation. Experimental data from the western area power system was provided by PNNL and Bonneville Power Administration (BPA) for both ambient conditions and for signal injection tests. Three large-scale tests were conducted for the western area in 2005 and 2006. Measured field PMU (Phasor Measurement Unit) data was provided to the three universities. A 19-machine simulation model was enhanced for testing the system identification algorithms. Extensive simulations were run with this model to test the performance of the algorithms. University of Wyoming researchers participated in four primary activities: (1) Block and adaptive processing techniques for mode estimation from ambient signals and probing signals, (2) confidence interval estimation, (3) probing signal design and injection method analysis, and (4) performance assessment and validation from simulated and field measured data. Subspace based methods have been use to improve previous results from block processing techniques. Bootstrap techniques have been developed to estimate confidence intervals for the electromechanical modes from field measured data. Results were obtained using injected signal data provided by BPA. A new probing signal was designed that puts more strength into the signal for a given maximum peak to peak swing. Further simulations were conducted on a model based on measured data and with the modifications of the 19-machine simulation model. Montana Tech researchers participated in two primary activities: (1) continued development of the 19-machine simulation test system to include a DC line; and (2) extensive simulation analysis of the various system identification algorithms and bootstrap techniques using the 19 machine model. Researchers at the University of Alaska-Fairbanks focused on the development and testing of adaptive filter algorithms for mode estimation using data generated from simulation models and on data provided in collaboration with BPA and PNNL. There efforts consist of pre-processing field data, testing and refining adaptive filter techniques (specifically the Least Mean Squares (LMS), the Adaptive Step-size LMS (ASLMS), and Error Tracking (ET) algorithms). They also improved convergence of the adaptive algorithms by using an initial estimate from block processing AR method to initialize the weight vector for LMS. Extensive testing was performed on simulated data from the 19 machine model. This project was also extensively involved in the WECC (Western Electricity Coordinating Council) system wide tests carried out in 2005 and 2006. These tests involved injecting known probing signals into the western power grid. One of the primary goals of these tests was the reliable estimation of electromechanical mode properties from measured PMU data. Applied to the system were three types of probing inputs: (1) activation of the Chief Joseph Dynamic Brake, (2) mid-level probing at the Pacific DC Intertie (PDCI), and (3) low-level probing on the PDCI. The Chief Joseph Dynamic Brake is a 1400 MW disturbance to the system and is injected for a ha

Pierre, John W.; Wies, Richard; Trudnowski, Daniel

2008-11-25T23:59:59.000Z

455

Advisory Group On The Application Of Nuclear Techniques To Geothermal  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » Advisory Group On The Application Of Nuclear Techniques To Geothermal Studies-Meeting In Pisa 8-12 Sep 1975 Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Advisory Group On The Application Of Nuclear Techniques To Geothermal Studies-Meeting In Pisa 8-12 Sep 1975 Details Activities (1) Areas (1) Regions (0) Abstract: Meeting proceedings - large list of papers and presentations dealing mostly with various isotopic analyses and their applications to geothermal exploration and characterization. Author(s): Unknown Published: Geothermics, Date Unknown

456

Deep Drilling Basic Research: Volume 4 - System Description. Final Report, November 1988--August 1990  

DOE Green Energy (OSTI)

The first section of this Volume will discuss the ''Conventional Drilling System''. Today's complex arrangement of numerous interacting systems has slowly evolved from the very simple cable tool rigs used in the late 1800s. Improvements to the conventional drilling rig have varied in size and impact over the years, but the majority of them have been evolutionary modifications. Each individual change or improvement of this type does not have significant impact on drilling efficiency and economics. However, the change is almost certain to succeed, and over time--as the number of evolutionary changes to the system begin to add up--improvements in efficiency and economics can be seen. Some modifications, defined and described in this Volume as Advanced Modifications, have more than just an evolutionary effect on the conventional drilling system. Although the distinction is subtle, there are several examples of incorporated advancements that have had significantly more impact on drilling procedures than would a truly evolutionary improvement. An example of an advanced modification occurred in the late 1970s with the introduction of Polycrystalline Diamond Compact (PDC) drill bits. PDC bits resulted in a fundamental advancement in drilling procedures that could not have been accomplished by an evolutionary improvement in materials metallurgy, for example. The last drilling techniques discussed in this Volume are the ''Novel Drilling Systems''. The extent to which some of these systems have been developed varies from actually being tested in the field, to being no more than a theoretical concept. However, they all have one thing in common--their methods of rock destruction are fundamentally different from conventional drilling techniques. When a novel drilling system is introduced, it is a revolutionary modification of accepted drilling procedures and will completely replace current techniques. The most prominent example of a revolutionary modification in recent history was the complete displacement of cable tool rigs by rotary drilling rigs in the late 1920s.

Anderson, E.E.; Maurer, W.C.; Hood, M.; Cooper, G.; Cook, N.

1990-06-01T23:59:59.000Z

457

Experimental thin film deposition and surface analysis techniques  

DOE Green Energy (OSTI)

An attempt has been made to present some of the thin-film deposition and surface analysis techniques which may be useful in growing superionic conducting materials. Emphasis is made on the importance of being careful in selecting process parameters and materials in order to produce films with properties outlined in this article. Also, special care should be given to proper consideration of grain boundary effects.

Collins, W.E.; Rambabu, B.

1986-01-01T23:59:59.000Z

458

Development of Load Tap Changer Monitoring Technique: Mechanism of Coking  

Science Conference Proceedings (OSTI)

Load tap changers (LTCs) play a major role in the reliable delivery of electric power. They are the single biggest contributors to transformer outages. To improve reliability and extend their service interval, utilities are adopting proactive maintenance practices using monitoring devices and seeking new diagnostic techniques. As part of an ongoing EPRI project, EPRI and cosponsor Consolidated Edison Co. of New York, Inc. engaged in a study of contact coking, one of the biggest problems in LTCs. This EPR...

2001-11-27T23:59:59.000Z

459

Nondestructive analysis of oil shales with PGNAA technique  

DOE Green Energy (OSTI)

The feasibility of nondestructive analysis of oil shales using the prompt gamma neutron activation analysis (PGNAA) technique was studied. The PGNAA technique, developed originally for continuous analysis of coal on the belt, was applied to the analysis of eight oil-shale samples, containing between 9 and 60 gallons of oil per ton and 0.8% to 3.4% hydrogen. The PGNAA technique was modified using four neutron moderation conditions: non-moderated neutrons; non-moderated and partially moderated neutrons reflected from a water box behind the source; neutrons moderated in a water box behind and in front of the source; and neutrons strongly moderated in a polyethylene block placed in front of the source and with reflected neutrons from a water box behind the source. The studied oil shales were measured in their aluminum or wooden (masonite) boxes. The obtained Ge-Li spectra were processed by LSI-11/23 computer, using the modified programs previously developed by SAI for continuous coal analysis. The results of such processing (the peak areas for several gamma lines) were corrected and plotted against the weight percent of each analyzed element (from the chemical analysis). Response curves developed for H, C, N, S, Na, Mg, Al, Si, Ti, Ca, Fe and K show generally good linear proportions of peak area to the weight percent of the element. For hydrogen determination, NMD conditions had to be used where the response curve was not linear, but followed a curve whose slope rose with hydrogen concentration. This effect is caused by improving neutron self-moderation in sample boxes of rich oil shales, as compared to poor self-moderation of neutrons in very lean oil shales. The moisture in oil shales was measured by microwave absorption technique in small masonite boxes. This method was calibrated four times using oil-shale samples mixed gradually with larger and larger amounts of water.

Maly, J.; Bozorgmanesh, H.

1984-02-01T23:59:59.000Z

460

Multiple-energy Techniques in Industrial Computerized Tomography  

DOE R&D Accomplishments (OSTI)

Considerable effort is being applied to develop multiple-energy industrial CT techniques for materials characterization. Multiple-energy CT can provide reliable estimates of effective Z (Z{sub eff}), weight fraction, and rigorous calculations of absolute density, all at the spatial resolution of the scanner. Currently, a wide variety of techniques exist for CT scanners, but each has certain problems and limitations. Ultimately, the best multi-energy CT technique would combine the qualities of accuracy, reliability, and wide range of application, and would require the smallest number of additional measurements. We have developed techniques for calculating material properties of industrial objects that differ somewhat from currently used methods. In this paper, we present our methods for calculating Z{sub eff}, weight fraction, and density. We begin with the simplest case -- methods for multiple-energy CT using isotopic sources -- and proceed to multiple-energy work with x-ray machine sources. The methods discussed here are illustrated on CT scans of PBX-9502 high explosives, a lexan-aluminum phantom, and a cylinder of glass beads used in a preliminary study to determine if CT can resolve three phases: air, water, and a high-Z oil. In the CT project at LLNL, we have constructed several CT scanners of varying scanning geometries using {gamma}- and x-ray sources. In our research, we employed two of these scanners: pencil-beam CAT for CT data using isotopic sources and video-CAT equipped with an IRT micro-focal x-ray machine source.

Schneberk, D.; Martz, H.; Azevedo, S.

1990-08-01T23:59:59.000Z

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461

Review of General Circulation Models and Downscaling Techniques  

Science Conference Proceedings (OSTI)

Climate forecasting and climate change projections are currently made with general circulation models (GCMs) that integrate the complex interactions of atmosphere-land-ocean-ice systems to simulate the Earth's climate and make projections of its future change on timescales from decades to centuries. This report reviews the current state of GCMs, including their approaches, limitations, uncertainties, and performance. The report also describes various downscaling techniques used to scale GCM output from c...

2009-07-31T23:59:59.000Z

462

Multiple-energy techniques in industrial computerized tomography  

SciTech Connect

Considerable effort is being applied to develop multiple-energy industrial CT techniques for materials characterization. Multiple-energy CT can provide reliable estimates of effective Z (Z{sub eff}), weight fraction, and rigorous calculations of absolute density, all at the spatial resolution of the scanner. Currently, a wide variety of techniques exist for CT scanners, but each has certain problems and limitations. Ultimately, the best multi-energy CT technique would combine the qualities of accuracy, reliability, and wide range of application, and would require the smallest number of additional measurements. We have developed techniques for calculating material properties of industrial objects that differ somewhat from currently used methods. In this paper, we present our methods for calculating Z{sub eff}, weight fraction, and density. We begin with the simplest case -- methods for multiple-energy CT using isotopic sources -- and proceed to multiple-energy work with x-ray machine sources. The methods discussed here are illustrated on CT scans of PBX-9502 high explosives, a lexan-aluminum phantom, and a cylinder of glass beads used in a preliminary study to determine if CT can resolve three phases: air, water, and a high-Z oil. In the CT project at LLNL, we have constructed several CT scanners of varying scanning geometries using {gamma}- and x-ray sources. In our research, we employed two of these scanners: pencil-beam CAT for CT data using isotopic sources and video-CAT equipped with an IRT micro-focal x-ray machine source.

Schneberk, D.; Martz, H.; Azevedo, S.

1990-08-01T23:59:59.000Z

463

Report on Crossarm Inspection Tools, Techniques, and Evaluations  

Science Conference Proceedings (OSTI)

Wood transmission crossarms, like other wood components, are subject to deterioration from mechanical stresses, decay, weathering, insect attack, and so on. Although the condition of these components is critical to maintaining line integrity, no methods beyond visual inspection, hammer sounding, and surface probing are widely used for their inspection. Recognizing the technology and technique gaps in crossarm inspection, the Electric Power Research Institute (EPRI) initiated research activities to develo...

2010-12-23T23:59:59.000Z

464

Mineral processing techniques for recycling investment casting shell  

Science Conference Proceedings (OSTI)

The Albany Research Center of the U.S. Department of Energy used materials characterization and minerals beneficiation methods to separate and beneficially modify spent investment-mold components to identify recycling opportunities and minimize environmentally sensitive wastes. The physical and chemical characteristics of the shell materials were determined and used to guide bench-scale research to separate reusable components by mineral-beneficiation techniques. Successfully concentrated shell materials were evaluated for possible use in new markets.

Dahlin, Cheryl L.; Nilsen, David N.; Dahlin, David C.; Hunt, Alton H.; Collins, W. Keith

2002-01-01T23:59:59.000Z

465

Development and Demonstration of New Condition Monitoring Sensors and Techniques  

Science Conference Proceedings (OSTI)

Condition monitoring, proper diagnostics and accurate interpretation can help to reduce the rate of aging of power transformers and provide a means for the assessment of the overall integrity of this asset, with minimum risk of sudden failure. This technical update presents details of the progress of EPRI research in the development and demonstration of sensors and techniques for diagnostic and condition assessment of power transformers.

2009-12-23T23:59:59.000Z

466

A Review of Spatial Statistical Techniques for Location Studies  

E-Print Network (OSTI)

While the new economic geography of trade and location has, understandably enough, concentrated on developing models of stylised relationships, it now seems that a review of some techniques which may be applied in empirical testing could prove useful. It is this task that will be approached here, conditioned by the advances taking place in new economic geography on the one hand, and in spatial data analysis on the other. Spatial data analysis ranges from the visualization and exploration of spatial data, through spatial statistics to spatial econometrics. The techniques involved are intended to explore for and demonstrate the presence of dependence between observations in space. Typically, observations are classified into three broad types: fields or surfaces with values at least theoretically observable over the whole study area, as in geostatistics, point patterns representing the occurrence of an observation, such as reported cases in epidemiology, and finally lattice observations, where attribute values adhere to a tesselation of the study area. This last form has much in common with time series studies, and shares a number of key testing techniques with econometrics. The paper reviews chosen techniques which can be applied in new economic geography. Point patterns, for instance, can be readily used to attempt to detect clustering. Lattice observations are used in the study of dynamic externalities, and consequently the effects of testing hypotheses based on spatial series should be examined. Finally, attention will be drawn to problems arising from spatial non-stationarity, when causal relationships may vary across space, and from the modifiable areal unit problem, when test results are influenced by the choice of spatial aggregation employed. 1

Roger Bivand

1998-01-01T23:59:59.000Z

467

Advanced Techniques for Removal of Retrievable Inferior Vena Cava Filters  

Science Conference Proceedings (OSTI)

Inferior vena cava (IVC) filters have proven valuable for the prevention of primary or recurrent pulmonary embolism in selected patients with or at high risk for venous thromboembolic disease. Their use has become commonplace, and the numbers implanted increase annually. During the last 3 years, in the United States, the percentage of annually placed optional filters, i.e., filters than can remain as permanent filters or potentially be retrieved, has consistently exceeded that of permanent filters. In parallel, the complications of long- or short-term filtration have become increasingly evident to physicians, regulatory agencies, and the public. Most filter removals are uneventful, with a high degree of success. When routine filter-retrieval techniques prove unsuccessful, progressively more advanced tools and skill sets must be used to enhance filter-retrieval success. These techniques should be used with caution to avoid damage to the filter or cava during IVC retrieval. This review describes the complex techniques for filter retrieval, including use of additional snares, guidewires, angioplasty balloons, and mechanical and thermal approaches as well as illustrates their specific application.

Iliescu, Bogdan; Haskal, Ziv J., E-mail: ziv2@mac.com [University of Maryland School of Medicine, Division of Vascular and Interventional Radiology (United States)

2012-08-15T23:59:59.000Z

468

Toshiba's developments on construction techniques of nuclear power plants  

SciTech Connect

Reliable and economic energy supplies are fundamental requirements of energy policies in Japan. To accomplish these needs, nuclear power plants are being increased in Japan. In recent years, construction cost increases and schedule extensions have affected the capital cost of nuclear energy, compared with fossil power plants, due to lower costs of oil and coal. On the other hand, several severe regulations have been applied to nuclear power plant designs. High-quality and cooperative engineering and harmonized design of equipment and parts are strongly required. Therefore, reduced construction costs and scheduling, as well as higher quality and reliability, are the most important items for nuclear industry. Toshiba has developed new construction techniques, as well as design and engineering tools for control and management, that demonstrate the positive results achieved in the shorter construction period of 1100-MW(electric) nuclear power plants. The normal construction period so far is 64 months, whereas the current construction period is 52 months. (New construction techniques are partially applied). In future years, the construction period will be lowered to 48 months. (New construction techniques are fully applied). A construction period is defined as time from the start of rock inspection to the start of commercial operation.

Hayashi, Y.; Itoh, N.

1987-01-01T23:59:59.000Z

469

Technique for rapid establishment of American lotus in remediation efforts  

Science Conference Proceedings (OSTI)

A technique for increasing the establishment rate of American lotus (Nelumbo lutea) and simplifying planting was developed as part of a pond remediation project. Lotus propagation techniques typically require scarification of the seed, germination in heated water, and planting in nursery containers. Then mature (~ 1 yr) nursery-grown stock is transferred to planting site or scarified seed are broadcast applied. Mature plants should grow more quickly, but can be sensitive to handling, require more time to plant, and cost more. Scarified seeds are easier to plant and inexpensive, but have a lag time in growth, can fail to germinate, and can be difficult to site precisely. We developed an intermediate technique using small burlap bags that makes planting easier, provides greater germination success, and avoids lag time in growth. Data on survival and growth from experiments using mature stock, scarified seeds, and bag lotus demonstrate that bag lotus grow rapidly in a variety of conditions, have a high survival rate, can be processed and planted easily and quickly, and are very suitable for a variety of remediation projects

Ryon, Michael G [ORNL; Fortner, Allison M [ORNL; Goins, Kenneth N [ORNL; Jett, Robert T [ORNL; McCracken, Kitty [ORNL; Morris, Gail Wright [ORNL; Riazzi, Adam [Lincoln County HS, Hamlin WV; Roy, W Kelly [ORNL

2013-01-01T23:59:59.000Z

470

Evaluation of flow capture techniques for measuring HVAC grilleairflows  

SciTech Connect

This paper discusses the accuracy of commercially available flow hoods for residential applications. Results of laboratory and field tests indicate these hoods can be inadequate to measure airflows in residential systems, and there can be large measurement discrepancies between different flow hoods. The errors are due to poor calibrations, sensitivity of the hoods to grille airflow non-uniformities, and flow changes from added flow resistance. It is possible to obtain reasonable results using some flow hoods if the field tests are carefully done, the grilles are appropriate, and grille location does not restrict flow hood placement. We also evaluated several simple flow capture techniques for measuring grille airflows that could be adopted by the HVAC industry and homeowners as simple diagnostics. These simple techniques can be as accurate as commercially available devices. Our test results also show that current calibration procedures for flow hoods do not account for field application problems. As a result, agencies such as ASHRAE or ASTM need to develop a new standard for flow hood calibration, along with a new measurement standard to address field use of flow capture techniques.

Walker, Iain S.; Wray, Craig P.

2002-11-01T23:59:59.000Z

471

Flame-capturing technique. 1: Adaptation to gas expansion  

E-Print Network (OSTI)

Various flame tracking techniques are often used in hydrodynamic simulations. Their use is indispensable when resolving actual scale of the flame is impossible. We show that parameters defining "artificial flame" propagation found from model systems may yield flame velocities several times distinct from the required ones, due to matter expansion being ignored in the models. Integral effect of material expansion due to burning is incorporated into flame capturing technique (FCT) [Khokhlov(1995)]. Interpolation formula is proposed for the parameters governing flame propagation yielding 0.2% accurate speed and width for any expansion (and at least 0.01% accurate for expansions typical in type Ia supernova explosions.) Several models with simple burning rates are studied with gas expansion included. Plausible performance of the technique in simulations is discussed. Its modification ensuring finite flame width is found. Implementation suggestions are summarized, main criterion being the scheme performance being insensitive to expansion parameter (thus absence of systematic errors when the burning progresses from inner to outer layers); in this direction promising realizations are found, leading to flame structure not changing while flame evolves through the whole range of densities in the white dwarf.

Andrey V. Zhiglo

2005-11-12T23:59:59.000Z

472

Feasibility study of a hybrid erosion drilling concept  

DOE Green Energy (OSTI)

The results of a system analysis of the ERODRILL concept are presented. ERODRILL is an erosion drilling technique that uses a stream of propellant capsules carried in the drilling mud and ignited near the bottom of the drill hole to provide a fluid jet on the rock face. The concept evaluated in this study was a hybrid system using the erosion drill to cut a kerf for a conventional rotary drill to break to. A preliminary design was made and a hypergolic propellant, Hercules HES 6573, was chosen. The background and rationale for this program are presented. The system, from its initial conception to its current hybrid design, is described. The propellant selection process is presented. The hazard evaluation, reliability analysis, and the economic analysis are given. Conclusions and recommendations are included. (MHR)

Not Available

1977-06-01T23:59:59.000Z

473

Use of Operational Comparability Techniques to Determine Realtime Acceptability of Meteorological Measurements  

Science Conference Proceedings (OSTI)

Comparability techniques have been applied operationally to processing meteorological measurements. Examples of comparability statistics are presented for both typical and atypical (instrument problem) situations. The comparability techniques ...

A. Edgar Mitchell Jr.; Robert W. Jubach; Ayhan Malkoc; Ray F. Zucker

1985-03-01T23:59:59.000Z

474

Nutritionally Enhanced Edible Oil and Oilseed ProcessingChapter 12 Hydrogenation Techniques  

Science Conference Proceedings (OSTI)

Nutritionally Enhanced Edible Oil and Oilseed Processing Chapter 12 Hydrogenation Techniques Processing eChapters Processing Press Downloadable pdf of Chapter 12 Hydrogenation Techniques from the book ...

475

Condition monitoring of biodegradable oil-filled transformers using DGA, PD and PDC measurement techniques.  

E-Print Network (OSTI)

??The three most common condition monitoring techniques were applied to laboratory test configurations that simulate biodegradable oil-filled transformer insulation system. The tested techniques were Dissolved… (more)

Muhamad, Nor Asiah

2009-01-01T23:59:59.000Z

476

Directional Drilling and Equipment for Hot Granite Wells  

DOE Green Energy (OSTI)

Directional drilling technology was extended and modified to drill the first well of a subsurface geothermal energy extraction system at the Fenton Hill, New Mexico, hot dry rock (HDR) experimental site. Borehole geometries, extremely hard and abrasive granite rock, and high formation temperatures combined to provide a challenging environment for directional drilling tools and instrumentation. Completing the first of the two-wellbore HDR system resulted in the definition of operation limitations of -many conventional directional drilling tools, instrumentation, and techniques. The successful completion of the first wellbore, Energy Extraction Well No. 2 (EE-21), to a measured depth of 4.7 km (15,300 ft) in granite reservoir rock with a bottomhole temperature of 320 C (610 F) required the development of a new high-temperature downhole motor and modification of existing wireline-conveyed steering tool systems. Conventional rotary-driven directional assemblies were successfully modified to accommodate the very hard and abrasive rock encountered while drilling nearly 2.6 km (8,500 ft) of directional hole to a final inclination of 35{sup o} from the vertical at the controlled azimuthal orientation. Data were collected to optimize the drilling procedures far the programmed directional drilling of well EE-3 parallel to, and 370 metres (1,200 ft) above, Drilling equipment and techniques used in drilling wellbores for extraction of geothermal energy from hot granite were generally similar to those that are standard and common to hydrocarbon drilling practices. However, it was necessary to design some new equipment for this program: some equipment was modified especially for this program and some was operated beyond normal ratings. These tools and procedures met with various degrees of success. Two types of shock subs were developed and tested during this project. However, downhole time was limited, and formations were so varied that analysis of the capabilities of these items is not conclusive. Temperature limits of the tools were exceeded. EE-2. Commercial drilling and fishing jars were improved during the drilling program. Three-cone, tungsten-carbide insert bit performance with downhole motors was limited by rapid gauge wear. Rotary drilling was optimized for wells EE-2 and EE-3 using softer (IADS 635 code) bits and provided a balance between gauge,. cutting structure, and bearing life. Problems of extreme drill string drag, drill string twist-off, and corrosion control are discussed.

Williams, R. E.; Neudecker, J. W.; Rowley, J.C.; Brittenham, T. L.

1981-01-01T23:59:59.000Z

477

PVUSA instrumentation and data analysis techniques for photovoltaic systems  

DOE Green Energy (OSTI)

The Photovoltaics for Utility Scale Applications (PVUSA) project tests two types of PV systems at the main test site in Davis, California: new module technologies fielded as 20-kW Emerging Module Technology (EMT) arrays and more mature technologies fielded as 70- to 500-kW turnkey Utility-Scale (US) systems. PVUSA members have also installed systems in their service areas. Designed appropriately, data acquisition systems (DASs) can be a convenient and reliable means of assessing system performance, value, and health. Improperly designed, they can be complicated, difficult to use and maintain, and provide data of questionable validity. This report documents PVUSA PV system instrumentation and data analysis techniques and lessons learned. The report is intended to assist utility engineers, PV system designers, and project managers in establishing an objective, then, through a logical series of topics, facilitate selection and design of a DAS to meet the objective. Report sections include Performance Reporting Objectives (including operational versus research DAS), Recommended Measurements, Measurement Techniques, Calibration Issues, and Data Processing and Analysis Techniques. Conclusions and recommendations based on the several years of operation and performance monitoring are offered. This report is one in a series of 1994--1995 PVUSA reports documenting PVUSA lessons learned at the demonstration sites in Davis and Kerman, California. Other topical reports address: five-year assessment of EMTs; validation of the Kerman 500-kW grid support PV plant benefits; construction and safety experience in in