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Note: This page contains sample records for the topic "wolc radio tower" 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.


1

CXAllenRadioTower2.pdf  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Southwestern Power Administration proposes to modify and reconstruct its Allen Radio Tower communications site as part of the Spectrum Relocation project. Categorical...

2

Radio Towers Geothermal Area | Open Energy Information  

Open Energy Info (EERE)

Radio Towers Geothermal Area Radio Towers Geothermal Area Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Geothermal Resource Area: Radio Towers Geothermal Area Contents 1 Area Overview 2 History and Infrastructure 3 Regulatory and Environmental Issues 4 Exploration History 5 Well Field Description 6 Geology of the Area 7 Geofluid Geochemistry 8 NEPA-Related Analyses (0) 9 Exploration Activities (0) 10 References Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"TERRAIN","zoom":6,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"500px","height":"300px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":43.03666667,"lon":-115.4566667,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

3

CX-003456: Categorical Exclusion Determination | Department of...  

Broader source: Energy.gov (indexed) [DOE]

Exclusion Determination CX-003456: Categorical Exclusion Determination Clean Energy Economic Development Initiative - Wind Anemometers on Existing WOLC Radio Tower CX(s) Applied:...

4

Convection towers  

DOE Patents [OSTI]

Convection towers which are capable of cleaning the pollution from large quantities of air, of generating electricity, and of producing fresh water utilize the evaporation of water sprayed into the towers to create strong airflows and to remove pollution from the air. Turbines in tunnels at the skirt section of the towers generate electricity, and condensers produce fresh water.

Prueitt, Melvin L. (Los Alamos, NM)

1996-01-01T23:59:59.000Z

5

Convection towers  

DOE Patents [OSTI]

Convection towers which are capable of cleaning the pollution from large quantities of air, of generating electricity, and of producing fresh water utilize the evaporation of water sprayed into the towers to create strong airflows and to remove pollution from the air. Turbines in tunnels at the skirt section of the towers generate electricity, and condensers produce fresh water.

Prueitt, Melvin L. (Los Alamos, NM)

1995-01-01T23:59:59.000Z

6

Convection towers  

DOE Patents [OSTI]

Convection towers which are capable of cleaning the pollution from large quantities of air, of generating electricity, and of producing fresh water utilize the evaporation of water sprayed into the towers to create strong airflows and to remove pollution from the air. Turbines in tunnels at the skirt section of the towers generate electricity, and condensers produce fresh water. 6 figs.

Prueitt, M.L.

1996-01-16T23:59:59.000Z

7

Convection towers  

DOE Patents [OSTI]

Convection towers which are capable of cleaning the pollution from large quantities of air and of generating electricity utilize the evaporation of water sprayed into the towers to create strong airflows and to remove pollution from the air. Turbines in tunnels at the skirt section of the towers generate electricity. Other embodiments may also provide fresh water, and operate in an updraft mode.

Prueitt, Melvin L. (Los Alamos, NM)

1994-01-01T23:59:59.000Z

8

Windmill tower  

SciTech Connect (OSTI)

A windmill tower supports a propeller and a platform that in turn supports a propeller feather control system and a generator system. The entire tower rotates at its base under changes in wind direction so the rotating propeller is constantly maintained upwind of the tower. The tower is a rigid structure that withstands cyclic thrust and torque loading sufficiently to reduce resonant vibrations of the tower as the propeller rotates under the influence of the wind. The resonant frequency of the tower can be higher than the passing frequency of the rotating propeller blades. The tower includes a pair of generally upright fore legs that converge upwardly toward a first apex on the propeller axis of rotation near the front of the platform immediately behind the propeller hub. A diagonal bracing strut extends downwardly from the first apex away from the plane of the fore legs and toward the rear of the tower. The bottoms of the fore legs and the diagonal bracing strut are rigidly interconnected by base plane truss members. A pair of upwardly converging aft legs extend diagonally upwardly from the bottoms of the fore legs toward a second apex aft of the first apex at the rear of the platform. At regular vertical intervals, stiffening trusses add rigidity to the main upright members of the tower structure. The natural frequency of the tower is raised by the fore legs and the diagonal bracing strut being interconnected in a rigid base plane truss. The diagonal bracing strut resists thrust loading on the tower, and the fore legs and aft legs resist torsional forces produced at the top of the tower.

Schachle, C.; Schachle, E.C.; Schachle, J.R.; Schachle, P.J.

1982-04-06T23:59:59.000Z

9

Convection towers  

DOE Patents [OSTI]

Convection towers which are capable of cleaning the pollution from large quantities of air and of generating electricity utilize the evaporation of water sprayed into the towers to create strong airflows and to remove pollution from the air. Turbines in tunnels at the skirt section of the towers generate electricity. Other embodiments may also provide fresh water, and operate in an updraft mode. 5 figures.

Prueitt, M.L.

1994-02-08T23:59:59.000Z

10

Vice President CEO, Tower Foundation  

E-Print Network [OSTI]

Vice President CEO, Tower Foundation Administrative Assistant to the AVP Information Representative Tower Foundation Charitable Gifts Officer Gift Analyst Gift Analyst Gift Analyst Senior Analyst Tower Foundation Stewardship Director Graphic Designer Administrative Assistant Web Communications

Su, Xiao

11

Microsoft Word - CF-Radio-Comm-Upgrades-CX.doc  

Broader source: Energy.gov (indexed) [DOE]

include construction of 25-foot tall radio towers and antenna systems within each of the BPA substations listed above. All of the proposed ground disturbing activities would take...

12

Cooling Towers- Energy Conservation Strategies Understanding Cooling Towers  

E-Print Network [OSTI]

Cooling towers are energy conservation devices that Management, more often than not, historically overlooks in the survey of strategies for plant operating efficiencies. The utilization of the colder water off the cooling tower is the money maker!...

Smith, M.

13

Power Tower | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

50 MW of power from CSP power towers are installed in the United States, Spain, and Germany. The SunShot Initiative funds (R&D) on power tower systems and related aspects within...

14

Dynamic response of guyed towers  

E-Print Network [OSTI]

guyed towers. A parametric study was conducted using eigen analysis to determine the effects of consistent mass, geometric stiffness and P-Delta gravity loads. Time domain solutions were obtained by direct integration for motion due to regular Stokes... guyed tower 2 References to guyed tower dynamic analysis 4 Effect of mass formulation on tower natural periods. 5 P-Delta effect on fundamental period. 6 Effect of axial compression on the 1st & 2nd mode. 7 Geometric stiffness effect on natural...

Gillcrist, Mark Christopher

2012-06-07T23:59:59.000Z

15

Windmill tower shadow eliminator  

SciTech Connect (OSTI)

In a wind driven propeller system an airfoil support for the shaft of a propeller having an even number of blades extends above and below the shaft a distance at least equal to the blade length and pivots with the propeller into the wind for substantially eliminating tower shadow effects on the propeller.

Randolph, A.J.

1984-04-17T23:59:59.000Z

16

Pueblo Towers | Open Energy Information  

Open Energy Info (EERE)

Towers Towers Jump to: navigation, search Name Pueblo Towers Facility Pueblo Towers Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner Vestas Towers Developer Vestas Towers Energy Purchaser Vestas Towers Location CO Coordinates 38.205834°, -104.588141° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":38.205834,"lon":-104.588141,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

17

Microsoft Word - CX-Marion and Sand Springs Substation Towers Revised.doc  

Broader source: Energy.gov (indexed) [DOE]

KEC-4 KEC-4 SUBJECT: Environmental Clearance Memorandum Dave Tripp Project Manager - TEP-CSB-1 Proposed Action: Marion and Sand Springs Substations Radio Tower Projects Budget Information: Work Orders 00243411 and 00243190; Task 3 Categorical Exclusion Applied (from Subpart D, 10 C.F.R. Part 1021): B1.19 Siting, construction, and operation of microwave and radio communication towers and associated facilities... Location: Marion and Deschutes counties, Oregon Proposed by: Bonneville Power Administration (BPA) Description of the Proposed Action: BPA proposes to install new radio towers at the Marion Substation and Sand Springs Substation communication sites in Oregon. BPA must vacate radio frequencies in the 1710-1755MHz band to comply with a Federal law mandating reallocation of

18

TOWER-TRACKING HELIOSTAT ARRAY.  

E-Print Network [OSTI]

?? This thesis presents a method of tracking and correcting for the swaying of a central receiver tower in concentrated solar production plants. The method (more)

Masters, Joel T

2011-01-01T23:59:59.000Z

19

Sandia National Laboratories: Solar Tower  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Solar Thermal Test Facility * NSTTF * Renewable Energy * SAND2012-8086W * solar * Solar Energy * solar power * Solar Research * Solar Tower Comments are closed. Renewable...

20

Cooling Towers Make Money  

E-Print Network [OSTI]

was hired and wrote specifications for a four cell induced draft counterflow cooling tower to cool 10,000 GPM entering at 95 0 F leaving at 85 0 F during an 80 0 F ambient wet bulb temperature. The specifications required that the bidders project a... F during an ambient wet bulb temperature of 7] OF could not be met The SuperCellular film fill, style] 3] 62 Illustration 3 was selected by the consultant because of its previous highly satisfactory service in sewage treatment trickling filter...

Burger, R.

Note: This page contains sample records for the topic "wolc radio tower" 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

FLORIDA TOWER FOOTPRINT EXPERIMENTS  

SciTech Connect (OSTI)

The Florida Footprint experiments were a series of field programs in which perfluorocarbon tracers were released in different configurations centered on a flux tower to generate a data set that can be used to test transport and dispersion models. These models are used to determine the sources of the CO{sub 2} that cause the fluxes measured at eddy covariance towers. Experiments were conducted in a managed slash pine forest, 10 km northeast of Gainesville, Florida, in 2002, 2004, and 2006 and in atmospheric conditions that ranged from well mixed, to very stable, including the transition period between convective conditions at midday to stable conditions after sun set. There were a total of 15 experiments. The characteristics of the PFTs, details of sampling and analysis methods, quality control measures, and analytical statistics including confidence limits are presented. Details of the field programs including tracer release rates, tracer source configurations, and configuration of the samplers are discussed. The result of this experiment is a high quality, well documented tracer and meteorological data set that can be used to improve and validate canopy dispersion models.

WATSON,T.B.; DIETZ, R.N.; WILKE, R.; HENDREY, G.; LEWIN, K.; NAGY, J.; LECLERC, M.

2007-01-01T23:59:59.000Z

22

Best Management Practice #10: Cooling Tower Management  

Broader source: Energy.gov [DOE]

Cooling towers regulate temperature by dissipating heat from recirculating water used to cool chillers, air-conditioning equipment, or other process equipment. Heat is rejected from the tower...

23

Improving Process Cooling Tower Eddiciency  

E-Print Network [OSTI]

of the Thrity-Fifth Industrial Energy Technology Conference New Orleans, LA. May 21-24, 2013 7 Improving Cooling Tower Efficiency ? Two Improvements in Capacity/Performance 1. Filtration for water quality control Side stream filtration Make up water quality...-Fifth Industrial Energy Technology Conference New Orleans, LA. May 21-24, 2013 2 Types of Cooling Towers Forced Draft Towers ESL-IE-13-05-08 Proceedings of the Thrity-Fifth Industrial Energy Technology Conference New Orleans, LA. May 21-24, 2013 3 Types...

Turpish, W.

2013-01-01T23:59:59.000Z

24

Cooling Tower Inspection with Scuba  

E-Print Network [OSTI]

A serious problem of scale and other solid material settling in heat transfer equipment was threatening to shut down our ethylene plant. All evidence pointed to the cooling tower as the source of the contamination. Visual inspection of the cooling...

Brenner, W.

1982-01-01T23:59:59.000Z

25

Towers for Offshore Wind Turbines  

Science Journals Connector (OSTI)

Increasing energy demand coupled with pollution free production of energy has found a viable solution in wind energy. Land based windmills have been utilized for power generation for more than two thousand years. In modern times wind generated power has become popular in many countries. Offshore wind turbines are being used in a number of countries to tap the energy from wind over the oceans and convert to electric energy. The advantages of offshore wind turbines as compared to land are that offshore winds flow at higher speed than onshore winds and the more available space. In some land based settings for better efficiency turbines are separated as much as 10 rotor diameters from each other. In offshore applications where only two wind directions are likely to predominate the distances between the turbines arranged in a line can be shortened to as little as two or four rotor diameters. Today more than a dozen offshore European wind facilities with turbine ratings of 450 kw to 3.6 MW exist offshore in very shallow waters of 5 to 12 m. Compared to onshore wind turbines offshore wind turbines are bigger and the tower height in offshore are in the range of 60 to 80 m. The water depths in oceans where offshore turbines can be located are within 30 m. However as the distance from land increases the costs of building and maintaining the turbines and transmitting the power back to shore also increase sharply. The objective of this paper is to review the parameters of design for the maximum efficiency of offshore wind turbines and to develop types offshore towers to support the wind turbines. The methodology of design of offshore towers to support the wind turbine would be given and the environmental loads for the design of the towers would be calculated for specific cases. The marine corrosion on the towers and the methods to control the corrosion also would be briefly presented. As the wind speeds tend to increase with distance from the shore turbines build father offshore will be able to capture more wind energy. Currently two types of towers are considered. Cylindrical tubular structures and truss type structures. But truss type structures have less weight and flexibility in design. The construction of the offshore towers to harness the wind energy is also presented. The results will include the calculation of wind and wave forces on the tower and the design details for the tower.

V. J. Kurian; S. P. Narayanan; C. Ganapathy

2010-01-01T23:59:59.000Z

26

Advanced Lighting Controls - My Venture from the Ivory Tower  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Advanced Lighting Controls - My Venture from the Ivory Tower Advanced Lighting Controls - My Venture from the Ivory Tower Speaker(s): Charlie Huizenga Date: June 15, 2012 - 12:00pm Location: 90-3122 Seminar Host/Point of Contact: Dragan Charlie Curcija Lighting energy represents 30-40% of commercial building electricity consumption, yet very few buildings have advanced lighting controls. The potential energy savings are tremendous as is the opportunity to reduce demand on the grid during critical peak use periods. Charlie will describe how low-cost wireless radio technology developed at UC Berkeley and commercialized by Adura Technologies is creating a paradigm shift in the way we think about controlling lighting. Beyond deep energy savings and demand response, the technology offers personal control for occupants and

27

Cooling Towers, Energy Conservation Strategies  

E-Print Network [OSTI]

undersized due to the low bidder syndrome (1). 4. New plant expansion needs colder temperatures off the tower. State of the Art Upgrading Users of cooling towers are not par ticularly concerned with the thermal analysis involving calculus, or delving... HISTORY I Anhydrous Ammonia Plant The Hawkeye Chemical Corporation, a subsidiary of the Getty Oil Company, pro jected a 50% expansion of their anhydroug ammonia output from 120,000 tons (1.09 Kg) per year to ~ production level of 225,000 tons (2...

Burger, R.

1983-01-01T23:59:59.000Z

28

Commissioning through "EDF Tower" construction  

E-Print Network [OSTI]

michel rouillot -architecte d.p.l.g. CommissioningCommissioningthrough through ??EDF TowerEDF Tower? construction? construction by Michel Rouillot Architect D.P.L.G. michel rouillot -architecte d.p.l.g. What is a building project ? michel rouillot... -architecte d.p.l.g. A spatial answerfor a work structure michel rouillot -architecte d.p.l.g. A very strong relationship between many building participants michel rouillot -architecte d.p.l.g. The production of the buildingThe production of the building...

Rouillot, M.

2004-01-01T23:59:59.000Z

29

GreenTower | Open Energy Information  

Open Energy Info (EERE)

GreenTower Jump to: navigation, search Name: GreenTower Place: Haiger 6, Germany Zip: 35708 Sector: Solar Product: Developer of a solar chimney technology, with greenhouses for...

30

The solar towers of Chankillo  

E-Print Network [OSTI]

An ancient solar observatory is composed by thirteen towers lined on a hill of a coastal desert of Peru. This is the Chankillo observatory. Here we discuss it, showing some simulations of the local sun direction. An analysis of the behaviour of shadows is also proposed.

Sparavigna, Amelia Carolina

2012-01-01T23:59:59.000Z

31

Vortex-augmented cooling tower - windmill combination  

DOE Patents [OSTI]

A cooling tower for cooling large quantities of effluent water from a production facility by utilizing natural wind forces includes the use of a series of helically directed air inlet passages extending outwardly from the base of the tower to introduce air from any direction in a swirling vortical pattern while the force of the draft created in the tower makes it possible to place conventional power generating windmills in the air passage to provide power as a by-product.

McAllister, J.E. Jr.

1982-09-02T23:59:59.000Z

32

Multi-objective optimization of solar tower power plants  

E-Print Network [OSTI]

Multi-objective optimization of solar tower power plants Pascal Richter Center for Computational · Optimization of solar tower power plants 1/20 #12;Introduction ­ Solar tower power plants Solar tower PS10 (11 MW) in Andalusia, Spain · Solar tower with receiver · Heliostat field with self-aligning mirrors

Ábrahám, Erika

33

Sandia National Laboratories: Power Towers for Utilities  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Engine Test Facility Central Receiver Test Facility Power Towers for Utilities Solar Furnace Dish Test Facility Optics Lab Parabolic Dishes Work For Others (WFO) User...

34

Untapped Energy Savings from Cooling Towers  

E-Print Network [OSTI]

flow changes the tower?s performance also by about 1%. Internal Influences So, where can easy improvements be found? One of the easiest is balancing the water distribution systems from one cell to the next. Balancing a crossflow tower means... making sure each of the distribution basins has the same water height. Figure 2 shows two adjacent basins where the closer basin height is about 7? lower than the farther basin height. We balanced basins on a 7 cell crossflow tower that had basins...

Phelps Jr., P.

2011-01-01T23:59:59.000Z

35

A Microcomputer Model of Crossflow Cooling Tower Performance  

E-Print Network [OSTI]

The energy use characteristics of evaporative cooling towers are of interest because, although such towers are widely used in industry, they do require a substantial amount of energy. Evaporative cooling towers are basically large heat exchangers...

Reichelt, G. E; Jones, J. W.

1984-01-01T23:59:59.000Z

36

Wind turbine tower for storing hydrogen and energy  

DOE Patents [OSTI]

A wind turbine tower assembly for storing compressed gas such as hydrogen. The tower assembly includes a wind turbine having a rotor, a generator driven by the rotor, and a nacelle housing the generator. The tower assembly includes a foundation and a tubular tower with one end mounted to the foundation and another end attached to the nacelle. The tower includes an in-tower storage configured for storing a pressurized gas and defined at least in part by inner surfaces of the tower wall. In one embodiment, the tower wall is steel and has a circular cross section. The in-tower storage may be defined by first and second end caps welded to the inner surface of the tower wall or by an end cap near the top of the tower and by a sealing element attached to the tower wall adjacent the foundation, with the sealing element abutting the foundation.

Fingersh, Lee Jay (Westminster, CO)

2008-12-30T23:59:59.000Z

37

Composite Tower Solutions | Open Energy Information  

Open Energy Info (EERE)

Solutions Solutions Jump to: navigation, search Name Composite Tower Solutions Place Provo, Utah Zip 84604 Sector Wind energy Product Composite Tower Solutions manufactures equipment for wind resource assessment needs, including meteorological towers, weather towers, and data collection and instrumentation towers. Coordinates 40.233765°, -111.668509° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":40.233765,"lon":-111.668509,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

38

Federal Energy Management Program: Best Management Practice: Cooling Tower  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Cooling Tower Management to someone by E-mail Cooling Tower Management to someone by E-mail Share Federal Energy Management Program: Best Management Practice: Cooling Tower Management on Facebook Tweet about Federal Energy Management Program: Best Management Practice: Cooling Tower Management on Twitter Bookmark Federal Energy Management Program: Best Management Practice: Cooling Tower Management on Google Bookmark Federal Energy Management Program: Best Management Practice: Cooling Tower Management on Delicious Rank Federal Energy Management Program: Best Management Practice: Cooling Tower Management on Digg Find More places to share Federal Energy Management Program: Best Management Practice: Cooling Tower Management on AddThis.com... Sustainable Buildings & Campuses Operations & Maintenance

39

Cooling Tower Report, October 2008 | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

2008 Electricity Reliability Impacts of a Mandatory Cooling Tower Rule for Existing Steam Generation Units Cooling Tower Report, October 2008 More Documents & Publications...

40

Wind, Thermal, and Earthquake Monitoring of the Watts Towers  

E-Print Network [OSTI]

C Solar heating will introduce stresses into the towersTower. The LACMA weather station records additional variables such as humidity and solar

English, Jackson

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "wolc radio tower" 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.


41

Best Management Practice: Cooling Tower Management | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Best Management Practice: Cooling Tower Management Best Management Practice: Cooling Tower Management Best Management Practice: Cooling Tower Management October 8, 2013 - 9:39am Addthis Cooling towers regulate temperature by dissipating heat from recirculating water used to cool chillers, air-conditioning equipment, or other process equipment. Heat is rejected from the tower primarily through evaporation. Therefore, by design, cooling towers consume significant amounts of water. Overview The thermal efficiency and longevity of the cooling tower and equipment used to cool depend on the proper management of water recirculated through the tower. Water leaves a cooling tower system in any one of four ways: Evaporation: This is the primary function of the tower and is the method that transfers heat from the cooling tower system to the

42

Multi-objective optimization of solar tower heliostat fields  

E-Print Network [OSTI]

Multi-objective optimization of solar tower heliostat fields Pascal Richter, Martin Frank and Erika Introduction Solar tower plants generate electric power from sunlight by focusing concentrated solar radiation electricity. Fig. 1 Solar tower plant PS10, 11 MW in Andalusia, Spain. [Source: flickr] Solar tower plants

Ábrahám, Erika

43

Optimal sequencing of a cooling tower with multiple cells  

E-Print Network [OSTI]

This paper evaluates the energy savings potential of multi-cell cooling tower optimal sequencing control methods. Annual tower fan energy usage is calculated for a counter-flow tower with multiple variable-speed fans. Effectiveness-NTU tower model...

Zhang, Z.; Liu, J.

2012-01-01T23:59:59.000Z

44

Hydraulic Cooling Tower Driver- The Innovation  

E-Print Network [OSTI]

One of the weaknesses of present day cooling tower drives are fan wrecks caused by shaft couplings breaking, gear box malfunctions due to inadequate lubrication, gear tooth wear, and inaccessibility for inspection and routine maintenance. The hydro...

Dickerson, J. A.

45

On thermal performance of seawater cooling towers  

E-Print Network [OSTI]

Seawater cooling towers have been used since the 1970s in power generation and other industries, so as to reduce the consumption of freshwater. The salts in seawater are known to create a number of operational problems, ...

Sharqawy, Mostafa H.

46

Projective preservation : reframing Rudolph's Tower for Boston  

E-Print Network [OSTI]

By 2012, the fate of Paul Rudolph's tower in downtown Boston has been in question for years while a vision of a denser city calls for its demolition. Projected development on the site currently argues that to move forward, ...

Turner, Jessica K

2012-01-01T23:59:59.000Z

47

Cooling Towers--Energy Conservation Strategies  

E-Print Network [OSTI]

A cooling water system can be optimized by operating the cooling tower at the highest possible cycles of concentration without risking sealing and fouling of heat exchanger surfaces, tube bundles, refrigeration equipment, overhead condensers...

Matson, J.

48

Cooling Towers, The Neglected Energy Resource  

E-Print Network [OSTI]

Loving care is paid to the compressors, condensers, and computer programs of refrigeration systems. When problems arise, operator: run around in circles with expensive "fixes", but historically ignore the poor orphan, the cooling tower perched...

Burger, R.

1985-01-01T23:59:59.000Z

49

Advanced wet-dry cooling tower concept  

E-Print Network [OSTI]

The purpose of this years' work has been to test and analyze the new dry cooling tower surface previously developed. The model heat transfer test apparatus built last year has been instrumented for temperature, humidity ...

Snyder, Troxell Kimmel

50

Side Stream Filtration for Cooling Towers  

Broader source: Energy.gov [DOE]

Report assesses side stream filtration options for cooling towers with an objective to assess key attributes that optimize energy and water savings and provide information about specific technology and implementation options.

51

Project Profile: Brayton Cycle Baseload Power Tower  

Broader source: Energy.gov [DOE]

Wilson Solarpower, under the Baseload CSP FOA, is validating a proposed utility-scale, Brayton cycle baseload power tower system with a capacity factor of at least 75% and LCOE of $0.09/kWh.

52

Cooling Towers, The Neglected Energy Resource  

E-Print Network [OSTI]

COOLING TOWERS, THE NEGLECTED ENERGY RESOURCE ROBERT BURGER President, Burger Associates, Inc. Dallas, Texas (USA) Loving care is paid to the compress ors, condensers, and computer programs of refrigeration and air conditioning systems... is too hot, high temperature cut-outs occur and more energy must be provided to the motors to maintain the refrigeration cycle. COOLING TOWERS: 1) are just as important a link in the chain as the other equipment, 2) are an important source...

Burger, R.

53

Wind Turbine Towers Establish New Height Standards and Reduce Cost of Wind Energy  

Office of Energy Efficiency and Renewable Energy (EERE)

Case study that summarizes the Wind Tower Systems and its Space Frame tower. Describes their new wind tower design and explains how DOE funding made this possible.

54

Microsoft Word - Granite-Mt-3G-Radio-Station-CX.doc  

Broader source: Energy.gov (indexed) [DOE]

0 0 REPLY TO ATTN OF: KEC-4 SUBJECT: Environmental Clearance Memorandum Creig Millen Project Manager - TEC-CSB-1 Proposed Action: Granite Mountain 3G Radio Station Project Budget Information: Work Order 00197218, Task 03 Categorical Exclusion Applied (from Subpart D, 10 C.F.R. Part 1021): B1.19 Siting, construction, and operation of microwave and radio communication towers and associated facilities... Location: Stevens County, Washington (T34N, R38E, Section 17) Proposed by: Bonneville Power Administration (BPA) Description of the Proposed Action: BPA proposes to install a new 100-foot radio tower, communication building, and related digital radio equipment at an existing BPA communications site on Granite Mountain in Stevens County, Washington. The new tower and building will upgrade and replace

55

Broadwind Energy Formerly Tower Tech Holdings | Open Energy Information  

Open Energy Info (EERE)

Broadwind Energy Formerly Tower Tech Holdings Broadwind Energy Formerly Tower Tech Holdings Jump to: navigation, search Name Broadwind Energy (Formerly Tower Tech Holdings) Place Manitowoc, Wisconsin Zip 54221-1957 Sector Wind energy Product US-based manufacturer of wind turbine towers, turbine assemblies such as nacelles, and monopiles. References Broadwind Energy (Formerly Tower Tech Holdings)[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Broadwind Energy (Formerly Tower Tech Holdings) is a company located in Manitowoc, Wisconsin . References ↑ "Broadwind Energy (Formerly Tower Tech Holdings)" Retrieved from "http://en.openei.org/w/index.php?title=Broadwind_Energy_Formerly_Tower_Tech_Holdings&oldid=343059"

56

Wind Turbine Towers Establish New Height Standards and Reduce...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Wind Turbine Towers Establish New Height Standards and Reduce Cost of Wind Energy Wind Turbine Towers Establish New Height Standards and Reduce Cost of Wind Energy Case study that...

57

Project Profile: Solar Power Tower Improvements with the Potential...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

with its baseline solar tower configuration, which is well represented by the System Advisor Model template for a 100-MW solar tower. This mature system-level design is the...

58

Vibration Control for Bridge Towers and Field Measurement  

Science Journals Connector (OSTI)

When the tower was under construction, there were some occasions to measure wind-induced response of the tower and also the performance of vibration control devices. Figure9.8...shows the observed relationship, ...

Yozo Fujino; Kichiro Kimura; Hiroshi Tanaka

2012-01-01T23:59:59.000Z

59

Best Management Practice #10: Cooling Tower Management | Department...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Evaporation: This is the primary function of the tower and is the method that transfers heat from the cooling tower system to the environment. The quantity of evaporation is not...

60

Optimal Heliostat Layout for Concentrating Solar Tower Systems  

Science Journals Connector (OSTI)

A methodology to give an optimal layout of a group of heliostats has been developed for concentrating solar tower ... the method determines an optimal configuration of a heliostat field around a tower where refle...

Motoaki Utamura; Yutaka Tamaura

2007-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "wolc radio tower" 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

Page not found | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

41 - 1550 of 28,905 results. 41 - 1550 of 28,905 results. Download CX-003366: Categorical Exclusion Determination Advanced Combustion Controls - Enabling Systems and Solutions (ACCESS) for High Efficiency Vehicles CX(s) Applied: A9, A11 Date: 08/13/2010 Location(s): Rochester Hills, Michigan Office(s): Energy Efficiency and Renewable Energy, National Energy Technology Laboratory http://energy.gov/nepa/downloads/cx-003366-categorical-exclusion-determination Download CX-003456: Categorical Exclusion Determination Clean Energy Economic Development Initiative - Wind Anemometers on Existing WOLC Radio Tower CX(s) Applied: A9, A11, B3.1 Date: 08/13/2010 Location(s): Somerset County, Maryland Office(s): Energy Efficiency and Renewable Energy, National Energy Technology Laboratory http://energy.gov/nepa/downloads/cx-003456-categorical-exclusion-determination

62

Page not found | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

71 - 10980 of 26,764 results. 71 - 10980 of 26,764 results. Download CX-003456: Categorical Exclusion Determination Clean Energy Economic Development Initiative - Wind Anemometers on Existing WOLC Radio Tower CX(s) Applied: A9, A11, B3.1 Date: 08/13/2010 Location(s): Somerset County, Maryland Office(s): Energy Efficiency and Renewable Energy, National Energy Technology Laboratory http://energy.gov/nepa/downloads/cx-003456-categorical-exclusion-determination Download CX-003371: Categorical Exclusion Determination Advanced Interaction, Computation and Visualization Tools for Sustainable Building Design CX(s) Applied: A9 Date: 08/12/2010 Location(s): Ithaca, New York Office(s): Energy Efficiency and Renewable Energy, National Energy Technology Laboratory http://energy.gov/nepa/downloads/cx-003371-categorical-exclusion-determination

63

Wind Turbine Towers Establish New Height Standards and Reduce Cost of Wind Energy  

Broader source: Energy.gov (indexed) [DOE]

Wind Tower Systems to develop the Wind Tower Systems to develop the Space Frame tower, a new concept for wind turbine towers. Instead of a solid steel tube, the Space Frame tower consists of a highly optimized design of five custom-shaped legs and interlaced steel struts. With this design, Space Frame towers can support turbines at greater heights, yet weigh and cost less than traditional steel tube towers. Wind Tower Systems LLC (now

64

Cooling Towers--Energy Conservation Strategies Preservative Spray Treatment Maintains Cooling Tower  

E-Print Network [OSTI]

Several problems common to most industrial wood framed cooling towers can be easily controlled with annual preservative spray treatment applications to the plenum area framework and drift eliminators. It eliminates the expensive periodic repairs due...

Reidenback, R.

65

Concentrating Solar Power Tower System Basics | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Concentrating Solar Power Tower System Basics Concentrating Solar Power Tower System Basics Concentrating Solar Power Tower System Basics August 20, 2013 - 5:06pm Addthis In power tower concentrating solar power systems, numerous large, flat, sun-tracking mirrors, known as heliostats, focus sunlight onto a receiver at the top of a tall tower. A heat-transfer fluid heated in the receiver is used to generate steam, which, in turn, is used in a conventional turbine generator to produce electricity. Some power towers use water/steam as the heat-transfer fluid. Other advanced designs are experimenting with molten nitrate salt because of its superior heat-transfer and energy-storage capabilities. Individual commercial plants can be sized to produce up to 200 megawatts of electricity. Illustration of a power tower power plant. Sunlight is shown reflecting off a series of heliostats surrounding the tower and onto the receiver at the top of the tower. The hot heat-transfer fluid exiting from the receiver flows down the tower, into a feedwater reheater, and then into a turbine, which generates electricity that is fed into the power grid. The cool heat-transfer fluid exiting the turbine flows into a steam condenser to be cooled and sent back up the tower to the receiver.

66

SunShot Initiative: Brayton Cycle Baseload Power Tower  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Brayton Cycle Baseload Power Brayton Cycle Baseload Power Tower to someone by E-mail Share SunShot Initiative: Brayton Cycle Baseload Power Tower on Facebook Tweet about SunShot Initiative: Brayton Cycle Baseload Power Tower on Twitter Bookmark SunShot Initiative: Brayton Cycle Baseload Power Tower on Google Bookmark SunShot Initiative: Brayton Cycle Baseload Power Tower on Delicious Rank SunShot Initiative: Brayton Cycle Baseload Power Tower on Digg Find More places to share SunShot Initiative: Brayton Cycle Baseload Power Tower on AddThis.com... Concentrating Solar Power Systems Components Competitive Awards CSP Research & Development Thermal Storage CSP Recovery Act Baseload CSP SunShot Multidisciplinary University Research Initiative CSP Heat Integration for Baseload Renewable Energy Deployment

67

Side Stream Filtration for Cooling Towers  

Broader source: Energy.gov (indexed) [DOE]

Side Stream Filtration Side Stream Filtration for Cooling Towers Prepared for the U.S. Department of Energy Federal Energy Management Program By Pacific Northwest National Laboratory X. Duan, J.L. Williamson, K.L McMordie Stoughton and B.K. Boyd October 2012 FEDERAL ENERGY MANAGEMENT PROGRAM i Contact Will Lintner, PE Federal Energy Management Program U.S. Department of Energy 1000 Independence Ave. SW Washington, DC 20585-0121 Phone: (202) 586-3120 E-mail: william.lintner@ee.doe.gov Cover photo: Cooling Towers. Photo from Pacific Northwest National Laboratory ii Acknowledgements The authors of the report would like to thank the following individuals that provided support to

68

Towards Holistic Power Tower System Optimization  

Science Journals Connector (OSTI)

Abstract Many stakeholders today consider power tower systems to be the most promising CSP technology for the future. Therefore much effort is spent to improve individual components and subsystems. While these are valuable steps towards cost reduction, it is also of great importance to perform an overall, i.e. holistic, system layout and optimization process. Still, even today heliostats are often characterized and even compared using the single parameter cost per square meter, which is not sufficient. More factors like optical and tracking accuracy, shape, structural deformation under operation loads and maybe even power consumption have to be factored in to allow for a meaningful comparison. In the paper recent activities targeting at a more holistic power tower system optimization are described. For the overall layout process of heliostat field, tower and receiver the complete system is modeled using SAM or an in-house tool based on SolTrace and Matlab to determine investment cost, annual electricity generation and resulting levelised electricity costs. By doing so, different heliostat types and field layouts can be directly compared using \\{LCoE\\} as a reasonable figure of merit. This logical approach to identify the optimum heliostat design is described and illustrated using two generic heliostat designs and the respective field layouts as an example; a recently developed updated tower cost curve is used. It is found that using specific heliostat costs (i.e. $/m2) alone as a figure of merit to assess different heliostat designs can be misleading, because heliostats characterized by lower specific investment costs, but also lower optical and tracking accuracy, can lead to higher levelised electricity costs, which means the real objective of power plant optimization is not reached by looking at heliostat costs per square meter alone.

G. Weinrebe; F. von Reeken; M. Whrbach; T. Plaz; V. Gcke; M. Balz

2014-01-01T23:59:59.000Z

69

District Cooling Using Central Tower Power Plant  

Science Journals Connector (OSTI)

Abstract During the operation of solar power towers there are occasions, commonly in the summer season, where some of the heliostats have to stop focusing at the central receiver, located at the top of the tower, because the maximum temperature that the receiver can withstand has been reached. The highest demands of cooling for air conditioning take place at these same occasions. In the present paper, we have analyzed the possibility of focusing the exceeding heliostats to the receiver increasing the mass flow rate of the heat transfer fluid over the nominal value and using the extra heat as a source of an absorption chiller. The chilled water would be used to cool buildings and offices, using a district cooling network. Using the extra heat of the solar power tower plant would greatly reduce the electricity usage. In this work we have analyzed the case of a circular field of heliostats focusing at a circular receiver, such as the case of Gemasolar plant. We have quantified the thermal power that can be obtained from the unused heliostats, the cooling capacity of the absorption system as well as the heat losses through the insulated pipes that distribute the chilled water to the buildings of the network.

C. Marugn-Cruz; S. Snchez-Delgado; M.R. Rodrguez-Snchez; M. Venegas

2014-01-01T23:59:59.000Z

70

Oak Ridge's EM Program Demolishes North America's Tallest Water Tower |  

Broader source: Energy.gov (indexed) [DOE]

Demolishes North America's Tallest Water Demolishes North America's Tallest Water Tower Oak Ridge's EM Program Demolishes North America's Tallest Water Tower August 27, 2013 - 12:00pm Addthis Oak Ridge’s K-1206 F Fire Water Tower falls into an empty field during a recent demolition project. Oak Ridge's K-1206 F Fire Water Tower falls into an empty field during a recent demolition project. OAK RIDGE, Tenn. - Oak Ridge's EM program recently demolished one of the most iconic structures at the East Tennessee Technology Park (ETTP). The 382-foot checkerboard water tower - the tallest in North America - dominated the site's skyline since its construction in 1958. The K-1206 F Fire Water Tower operated as part of the site's fire protection system, but it was drained, disconnected and permanently taken

71

Intelligent Spectrum Sensor Radio.  

E-Print Network [OSTI]

??A cognitive radio is a radio with built-in intelligence that makes it able to utilize the radio frequency spectrum more efficiently by adapting to the (more)

Mian, Omer

2008-01-01T23:59:59.000Z

72

Competitive Landscape of Mobile Telecommunications Tower Companies in India  

Science Journals Connector (OSTI)

With the entry of 3G and WiMAX players, the Indian mobile subscriber base is expected to reach 1110 million by the end of 2015. To meet mobile infrastructure demand, India will require approximately 350,000 to 400,000 mobile telecommunications towers ... Keywords: Business Models, Infrastructure Sharing, Joint Venture Companies, Mobile Network Operators MNO, Mobile Telecommunication Tower Valuation, Mobile Telecommunications Towers, Telecommunication Circles

N.P. Singh

2010-01-01T23:59:59.000Z

73

Upcoming Funding Opportunity for Tower Manufacturing and Installation...  

Office of Environmental Management (EM)

systems with hub heights of at least 120 meters. Scaling to taller towers allows wind turbines to capture less turbulent and often stronger wind resources, thereby increasing...

74

Concentrating Solar Power Tower System Basics | Department of...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

which, in turn, is used in a conventional turbine generator to produce electricity. Some power towers use watersteam as the heat-transfer fluid. Other advanced designs are...

75

Building a Better Transmission Tower | Department of Energy  

Energy Savers [EERE]

500-kilovolt tower one of hundreds on the McNary-John Day line saving BPA big bucks. | Photo courtesy of Bonneville Power Administration A helicopter hoists...

76

Upcoming Funding Opportunity for Tower Manufacturing and Installation...  

Broader source: Energy.gov (indexed) [DOE]

and logistics constraints affecting the deployment of taller utility-scale wind turbine systems with hub heights of at least 120 meters. Scaling to taller towers allows wind...

77

Microsoft Word - PowerTower_work_2009.doc  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

tower systems Accomplishments * Helped Rocketdyne begin development of their own heliostat * Performed first-ever test of a heliostat at a distance of 1 mile * Updated SOLERGY...

78

Radio Data  

Science Journals Connector (OSTI)

... abacs provided now cover wave-lengths down to five metres, while provision is made for audio-frequencies over the range 20-10,000 cycles a second. This publication contains a ... the means for obtaining the inductance, capacitance and reactance of coils and condensers at both audio- and radio-frequencies, charts are given for obtaining the efficiency and time constant of ...

1935-12-21T23:59:59.000Z

79

Data Center Economizer Cooling with Tower Water; Demonstration of a  

E-Print Network [OSTI]

exchanger was configured to use higher temperature water produced by a cooling tower alone. The other coilLBNL-6660E Data Center Economizer Cooling with Tower Water; Demonstration of a Dual Heat Exchanger-temperature cooling water, so that it can support many more hours of free cooling compared to traditional systems

80

Microsoft Word - CX_MerrittRadioStationUpgrade_2013.docx  

Broader source: Energy.gov (indexed) [DOE]

8, 2013 8, 2013 REPLY TO ATTN OF: KEC-4 SUBJECT: Environmental Clearance Memorandum Ben Deschuytter Project Manager - TEP-CSB-1 Proposed Action: Merritt Radio Station Upgrade Categorical Exclusions Applied (from Subpart D, 10 C.F.R. Part 1021): B1.19 Microwave, meteorological, and radio towers Location: Winton, Chelan County, WA Township 26N, Range 16E, and Section 2 Proposed by: Bonneville Power Administration (BPA) Description of the Proposed Action: BPA plans to upgrade its Merritt Radio Station in the Wenatchee River Ranger District of the Okanogan-Wenatchee National Forest (USFS). The proposed radio station upgrade would replace the existing communication building, electrical service, and propane tank with a new building and propane tank in adjacent locations on the

Note: This page contains sample records for the topic "wolc radio tower" 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

Conversion Tower for Dispatchable Solar Power: High-Efficiency Solar-Electric Conversion Power Tower  

SciTech Connect (OSTI)

HEATS Project: Abengoa Solar is developing a high-efficiency solar-electric conversion tower to enable low-cost, fully dispatchable solar energy generation. Abengoas conversion tower utilizes new system architecture and a two-phase thermal energy storage media with an efficient supercritical carbon dioxide (CO2) power cycle. The company is using a high-temperature heat-transfer fluid with a phase change in between its hot and cold operating temperature. The fluid serves as a heat storage material and is cheaper and more efficient than conventional heat-storage materials, like molten salt. It also allows the use of a high heat flux solar receiver, advanced high thermal energy density storage, and more efficient power cycles.

None

2012-01-11T23:59:59.000Z

82

Cooling Towers: Understanding Key Components of Cooling Towers and How to Improve Water Efficiency  

Broader source: Energy.gov (indexed) [DOE]

Paul Johnston-Knight Introduction Federal laws and regulations require Federal agencies to reduce water use and improve water efficiency. Namely, Executive Order 13514 Federal Leadership in Environmental, Energy, and Economic Performance, requires an annual two percent reduction of water use intensity (water use per square foot of building space) for agency potable water consumption as well as a two percent reduction of water use for industrial, landscaping, and agricultural applica- tions. Cooling towers can be a significant

83

Control of Noise in Power Station Cooling Tower Systems  

Science Journals Connector (OSTI)

Power?station cooling tower systems must handle large volumes of water and air with large potential energy in the water flows and the requirement for large fans. To minimize the noise generated at power station sites use is made of efficient tower fill materials dual low?speed fans (which shifts the spectrum and lowers mid?frequency noise level) and barrier effects in tower location and orientation. Conventional noise control measures such as mufflers are avoided because of the required increase in pressure across the fan and the high initial cost for quieting large towers. The use of natural draft towers is discussed and it is shown that although the low?frequency noise may be reduced the noise levels at typical property line locations are of the same order of magnitude as that for conventional mechanical cooling towers. Since cooling towers at power stations are required as an environmental (thermal) pollution control measure a trade?off between temperature rise of local water supplies versus increases in community noise becomes a critical factor.

Lewis S. Goodfriend

1973-01-01T23:59:59.000Z

84

Use of nanofiltration to reduce cooling tower water usage.  

SciTech Connect (OSTI)

Nanofiltration (NF) can effectively treat cooling-tower water to reduce water consumption and maximize water usage efficiency of thermoelectric power plants. A pilot is being run to verify theoretical calculations. A side stream of water from a 900 gpm cooling tower is being treated by NF with the permeate returning to the cooling tower and the concentrate being discharged. The membrane efficiency is as high as over 50%. Salt rejection ranges from 77-97% with higher rejection for divalent ions. The pilot has demonstrated a reduction of makeup water of almost 20% and a reduction of discharge of over 50%.

Sanchez, Andres L.; Everett, Randy L.; Jensen, Richard Pearson; Cappelle, Malynda A.; Altman, Susan Jeanne

2010-09-01T23:59:59.000Z

85

Recycling for radio astronomy  

Science Journals Connector (OSTI)

......research-article Features Recycling for radio astronomy Melvin Hoare Professor of Astrophysics at the...space missions, carry out single-dish radio astronomy and boost existing radio-astronomy interferometer arrays, objectives that bring......

Melvin Hoare

2012-02-01T23:59:59.000Z

86

Proposed Transmission Towers Proposed New Substation Sites Proposed...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

6-1E: Recreation Inset Maps for Map 6-1C and Map 6-1D Proposed Transmission Towers Proposed New Substation Sites Proposed Route Segments (not drawn to scale) New Access Roads...

87

About the Design & Construction Collaborative Life Sciences Building & Skourtes Tower  

E-Print Network [OSTI]

About the Design & Construction Collaborative Life Sciences Building & Skourtes Tower With an emphasis on connection, the inter-disciplinary, multi-institutional building's design reflects its. Anticipating LEED Platinum rating, the building incorporated sustainable construction practices, including div

Chapman, Michael S.

88

Energy Efficiency Evaluation of Guangzhou West Tower Faade System  

E-Print Network [OSTI]

Guangzhou West Tower is an extremely tall public building. The energy efficiency evaluation of its faade should be different than that of ordinary public buildings. Based on the national code GB50189-2005, Design Standard for Energy efficiency...

Meng, Q.; Zhang, L.

2006-01-01T23:59:59.000Z

89

Cooling Towers - Energy Conservation and Money Making Mechanisms  

E-Print Network [OSTI]

The utilization of colder water conserves energy, creates profits, increases product output. In an effort to obtain greater efficiencies and conserve both energy and dollars, all too many engineers neglect the potential of the cooling tower. Many...

Burger, R.

1981-01-01T23:59:59.000Z

90

On towers of function fields of Artin-Schreier type  

Science Journals Connector (OSTI)

In this article we derive strong conditions on the defining equations of asymptotically good Artin-Schreier towers. We will show that at most three kinds of defining equations can give rise to a recursively de...

Peter Beelen; Arnaldo Garcia 1; 2

2004-07-01T23:59:59.000Z

91

Dynamics and optimal control of flexible solar updraft towers  

Science Journals Connector (OSTI)

...control of flexible solar updraft towers...University of New Mexico, , Albuquerque...USA The use of solar chimneys for energy production was...a) Potential energy as a function of...University of New Mexico solar chimney prototype...

2015-01-01T23:59:59.000Z

92

Workers Safely Tear Down Towers at Manhattan Project Site | Department...  

Broader source: Energy.gov (indexed) [DOE]

uncontaminated and in a non-posted area. Addthis Related Articles Oak Ridge's K-1206 F Fire Water Tower falls into an empty field during a recent demolition project. Oak Ridge's...

93

Don Ana Sun Tower Solar Power Plant | Open Energy Information  

Open Energy Info (EERE)

Don Ana Sun Tower Solar Power Plant Don Ana Sun Tower Solar Power Plant Jump to: navigation, search Name Don Ana Sun Tower Solar Power Plant Facility Don Ana Sun Tower Sector Solar Facility Type Concentrating Solar Power Developer NRG Energy/eSolar Location Dona Ana County, New Mexico Coordinates 32.485767°, -106.7234639° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":32.485767,"lon":-106.7234639,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

94

Alpine SunTower Solar Power Plant | Open Energy Information  

Open Energy Info (EERE)

SunTower Solar Power Plant SunTower Solar Power Plant Jump to: navigation, search Name Alpine SunTower Solar Power Plant Facility Alpine SunTower Sector Solar Facility Type Concentrating Solar Power Developer NRG Energy/eSolar Location Lancaster, California Coordinates 34.6867846°, -118.1541632° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":34.6867846,"lon":-118.1541632,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

95

Suppression of the vibrations of wind turbine towers  

Science Journals Connector (OSTI)

......suppression of the vibrations of wind turbine towers. As a source of renewable and clean energy, wind power is rapidly increasing its...capacity in many countries. Large offshore turbines are subjected to severe weather......

Xiaowei Zhao; George Weiss

2011-09-01T23:59:59.000Z

96

2010sr27[cooling_tower_complete].doc  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Friday, September 17, 2010 Friday, September 17, 2010 james-r.giusti@srs.gov Paivi Nettamo, SRNS, (803) 952-6938 paivi.nettamo@srs.gov K Cooling Tower Project Reaches Completion Aiken, S.C. - One of the most visual milestones of cleanup projects underway within the Department of Energy's Office of Environmental Management was the demolition of the K-Reactor Cooling Tower at the Savannah River Site (SRS). Now, this American Recovery and Reinvestment Act project has been

97

Parametric study and dynamic analysis of compliant piled towers  

E-Print Network [OSTI]

PARAMETRIC STUDY AND DYNAMIC ANALYSIS OF COMPLIANT PILED TOWERS A Thesis by KARL HEINZ MOOG Submitted to the Office of Graduate Studies of Texas ARM University in partial fulfillment of the requirements for the degree ol' MASTER OF SCIENCE... May f990 Major Subject: Ocean Engineering PARAMETRIC STUDY AND DYNAMIC ANALYSIS OF COMPLIANT PILED TOWERS A Thesis by KARL HEINZ MOOG Approved as to style and content by: Jack Lou (Chair of Committee) Ala. n slazzolo (Member) Robert Randall...

Moog, Karl Heinz

2012-06-07T23:59:59.000Z

98

Rebuilding the Tower of Babel: An introduction to freshman composition  

E-Print Network [OSTI]

REBUILDING THE TOWER OF BABEL: AN INTRODUCTION TO FRESHMAN COMPOSITION A Thesis by KAREN DAVIS Submitted to the Graduate College of Texas ABM University in partial fulfillment of the requirement for the degree of MASTER OF ARTS May 1978... Major Subject: English REBUILDING THE TOWER OF BABEL: AN INTRODUCTION TO FRESHMAN COMPOSITION A Thesis by KAREN DAVIS Approved as to style and content by: (Chairman of Committee) Head of Department) 7 i +i~ Mem er) (Member) May 1978 ABSTRACT...

Davis, Karen

2012-06-07T23:59:59.000Z

99

American Tower Company | Open Energy Information  

Open Energy Info (EERE)

Company Company Jump to: navigation, search Name American Tower Company Address P.O. Box 29 Place Shelby, Ohio Zip 44875 Sector Wind energy Product Agriculture;Business and legal services; Energy audits/weatherization; Engineering/architectural/design; Manufacturing; Retail product sales and distribution Phone number 419-347-1185 Website http://www.amertower.com Coordinates 40.8814452°, -82.6618424° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":40.8814452,"lon":-82.6618424,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

100

Microsoft Word - CX_TunkRadioStationUpgrade_2012.docx  

Broader source: Energy.gov (indexed) [DOE]

May 30, 2012 May 30, 2012 REPLY TO ATTN OF: KEC-4 SUBJECT: Environmental Clearance Memorandum Ben Deschuytter Project Manager - TEP-CSB-1 Proposed Action: Tunk Mountain Radio Station Upgrade Categorical Exclusions Applied (from Subpart D, 10 C.F.R. Part 1021): B1.19- Siting/construction/operation of microwave/radio communication towers Location: Synarep, Okanogan County, WA Township 35N, Range 29E, and Section 8 Proposed by: Bonneville Power Administration (BPA) Description of the Proposed Action: BPA plans to upgrade its Tunk Mountain Radio Station in the Tonasket Ranger District of the Okanogan-Wenatchee National Forest. BPA is coordinating with the U.S. Forest Service (USFS) to ensure the existing land use permit is

Note: This page contains sample records for the topic "wolc radio tower" 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

Microsoft Word - CX_MetalineRadioStationUpgrade_2012.docx  

Broader source: Energy.gov (indexed) [DOE]

July 11, 2012 July 11, 2012 REPLY TO ATTN OF: KEC-4 SUBJECT: Environmental Clearance Memorandum Ben Deschuytter Project Manager - TEP-CSB-1 Proposed Action: Metaline Radio Station Upgrade Project Categorical Exclusions Applied (from Subpart D, 10 C.F.R. Part 1021): B1.19- Siting/construction/operation of microwave/radio communication towers Location: Metaline Falls, Pend Orielle County, WA Township 40N, Range 43E, Section 31 Proposed by: Bonneville Power Administration (BPA) Description of the Proposed Action: BPA proposes to upgrade its Metaline Radio Station in the Sullivan Lake Ranger District of the Colville National Forest. BPA is coordinating with the US Forest Service (USFS) to ensure the existing land use agreement is modified to adequately address

102

Outline of Radio Astronomy  

Science Journals Connector (OSTI)

... about when a technique developed for one type of investigation is applied to another. Radio astronomy is an excellent example of this. During the past seven years the use of ... radio stars' which emit strongly in the radio-frequency portion of the spectrum."Radio Astronomy", by A. C. B. Lovell and J. A. Clegg, gives an ...

J. A. RATCLIFFE

1953-07-11T23:59:59.000Z

103

Technical Evaluation of Side Stream Filtration for Cooling Towers  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Cooling Towers (photo from Pacific Cooling Towers (photo from Pacific Northwest National Laboratory) * Scaling: Scaling is the precipitation of dissolved mineral components that have become saturated in solution, which can lower efficiency of the system. * Fouling: Fouling occurs when suspended particles or biologic growth forms an insulating film on heat transfer surfaces. Common foulants include organic matter, process oils, and silt, which can also lower system performance. * Microbiological Activity: Microbiological activity refers to microorganisms that live and grow in the cooling system that can contribute

104

Technical Evaluation of Side Stream Filtration for Cooling Towers  

Broader source: Energy.gov (indexed) [DOE]

Cooling Towers (photo from Pacific Cooling Towers (photo from Pacific Northwest National Laboratory) * Scaling: Scaling is the precipitation of dissolved mineral components that have become saturated in solution, which can lower efficiency of the system. * Fouling: Fouling occurs when suspended particles or biologic growth forms an insulating film on heat transfer surfaces. Common foulants include organic matter, process oils, and silt, which can also lower system performance. * Microbiological Activity: Microbiological activity refers to microorganisms that live and grow in the cooling system that can contribute

105

Automatically controlled wind propeller and tower shadow eliminator  

SciTech Connect (OSTI)

A propeller hub carries pivotally-mounted blades that are linked to a spring-loaded collar on the propeller shaft for automatic coning and feathering under predetermined high velocity movement along the propeller shaft to change the blade pitch angle during low wind velocity conditions. An airfoil support mounts a propeller shaft and turns therewith to reduce tower shadow effects. This is called a ''down-wind system'' meaning the propeller is behind the tower and causes the assembly to rotate into the wind without a tail vane.

Randolph, A.J.

1982-01-12T23:59:59.000Z

106

Multi-tower line focus Fresnel array project  

SciTech Connect (OSTI)

As an alternative to conventional tracking solar thermal trough systems, one may use line focus Fresnel reflector systems. In a conventional Fresnel reflector design, each field of reflectors is directed to a single tower. However efficient systems of very high ground utilisation can be setup if a field of reflectors uses multiple receivers on different towers. This paper describes a line focus system, called the compact linear fresnel reflector system and a project to produce an initial 95 MWth solar array. The array will be used as a retrofit preheater for a coal fired generating plant.

Mills, D.R.; Morrison, G.; Pye, J.; Le Lievre, P. [Solar Heat & Power SHP Pty. Ltd., Sydney, NSW (Australia)

2006-02-15T23:59:59.000Z

107

A test section for evaluating cooling tower components  

E-Print Network [OSTI]

be- ing, used i'or the evaluation of various t;, . pss of cooling tower packing. The mater measuring and heating equipnent hsvs been used in ths testing of two small cmneroial cooling tcsrers. 37 C~WP18FR STATIC PREDStlRE -/g. g~g 1 fry v t t... be- ing, used i'or the evaluation of various t;, . pss of cooling tower packing. The mater measuring and heating equipnent hsvs been used in ths testing of two small cmneroial cooling tcsrers. 37 C~WP18FR STATIC PREDStlRE -/g. g~g 1 fry v t t...

Alter, Alan Brian

2012-06-07T23:59:59.000Z

108

SunShot Initiative: Solar Power Tower Improvements with the Potential to  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Solar Power Tower Improvements Solar Power Tower Improvements with the Potential to Reduce Costs to someone by E-mail Share SunShot Initiative: Solar Power Tower Improvements with the Potential to Reduce Costs on Facebook Tweet about SunShot Initiative: Solar Power Tower Improvements with the Potential to Reduce Costs on Twitter Bookmark SunShot Initiative: Solar Power Tower Improvements with the Potential to Reduce Costs on Google Bookmark SunShot Initiative: Solar Power Tower Improvements with the Potential to Reduce Costs on Delicious Rank SunShot Initiative: Solar Power Tower Improvements with the Potential to Reduce Costs on Digg Find More places to share SunShot Initiative: Solar Power Tower Improvements with the Potential to Reduce Costs on AddThis.com... Concentrating Solar Power

109

Tower of Hanoi Most of the following paragraphs were copied from wikipedia [I]. Pictures were bor-  

E-Print Network [OSTI]

/shopping/item-img/tower-of -hanoi-01.jpg [3] http ://www .mactech.com/articles/mactech/Vol .02/02.01/Towers/img002.gif For applets

Lalín, Matilde

110

SHM BASED SYSTEM DESIGN OFA WIND TURBINE TOWER USING A MODAL SENSITIVITY BASED BAYES DETECTOR  

E-Print Network [OSTI]

SHM BASED SYSTEM DESIGN OFA WIND TURBINE TOWER USING A MODAL SENSITIVITY BASED BAYES DETECTOR Mads of the NREL 5MW wind turbine tower subjected to bending fatigue and horizontal circumferential cracking

Boyer, Edmond

111

Propagation of the low-frequency noise generated by power station water-cooling towers  

Science Journals Connector (OSTI)

The propagation of low-frequency noise generated by air turbulent motion in water-cooling towers is investigated by the use of geometrical acoustics of moving media. It is shown that a cooling tower plum acts ...

Sergei P. Fisenko

1997-01-01T23:59:59.000Z

112

The Parameter Optimization and Analysis of a Multi-Stage Tower Type of Solar Desalination Unit  

Science Journals Connector (OSTI)

After the analysis of the multi-stage tower type of solar desalination unit[1], the unit is optimized...

Chen Ziqian; He Kaiyan; Zheng Hongfei

2009-01-01T23:59:59.000Z

113

Optimal design of a dry-type natural-draft cooling tower by geometric programming  

Science Journals Connector (OSTI)

In this paper, the optimal design of dry-type natural-draft cooling towers is investigated. Using...

J. G. Ecker; R. D. Wiebking

1978-10-01T23:59:59.000Z

114

Optimal Design of a Dry-Type Natural-Draft Cooling Tower by Geometric Programming  

Science Journals Connector (OSTI)

In this paper, the optimal design of dry-type natural-draft cooling towers is investigated. Using...

J. G. Ecker; R. D. Wiebking

1980-01-01T23:59:59.000Z

115

Energy Efficient Radio Resource  

E-Print Network [OSTI]

Energy Efficient Radio Resource Management in a Coordinated Multi-Cell Distributed Antenna System Omer HALILOGLU Introduction System Model Performance Evaluation Conclusion References Energy Efficient Hacettepe University 5 September 2014 Omer HALILOGLU (Hacettepe University) Energy Efficient Radio Resource

Yanikomeroglu, Halim

116

Ilchmann, Achim; Pahl, M. : Adaptive Multivariable pH Regulation of a Biogas Tower Reactor  

E-Print Network [OSTI]

Ilchmann, Achim; Pahl, M. : Adaptive Multivariable pH Regulation of a Biogas Tower Reactor Zuerst. The adaptive controller was successlullytesteclover il pcriod of tu'o nonths at a biogas tower reuetoriu pilot are not applicable to the biogas tower reüctor.since a dontinatingf-eatureof the new reactol' prir-rciplc-is its

Knobloch,Jürgen

117

THE TOWER FOUNDATION OF SAN JOSE STATE UNIVERSITY Procurement Card Application  

E-Print Network [OSTI]

THE TOWER FOUNDATION OF SAN JOSE STATE UNIVERSITY Procurement Card Application CARDHOLDER card is lost or stolen, I will notify the Tower Foundation immediately. I will surrender my Procurement Card to Tower Foundation upon termination of employment or upon reallocation of duties which do

Eirinaki, Magdalini

118

* : Hossein Ameri Novel Client Booking System in KLCC Twin Tower Bridge  

E-Print Network [OSTI]

Tower Bridge H. Ameri* University Malaya Center of research and applied electronics, University as well as scheduling tours to visit "Petronas Twin Towers Sky Bridge". The system should at least support of this system are tourist who would like to visit the twin towers sky bridge, system operators that includes

Paris-Sud XI, Université de

119

On the growth of Betti numbers in $p$-adic analytic towers.  

E-Print Network [OSTI]

We study the asymptotic growth of Betti numbers in tower of finite covers and provide simple proofs of approximation results, which were previously obtained by Calegari-Emerton, in the generality of arbitrary p-adic analytic towers of covers. Further, we also obtain partial results about arbitrary pro-$p$ towers.

Nicolas Bergeron; Peter Linnell; Wolfgang Lck; Roman Sauer

120

Radio Research During 1959  

Science Journals Connector (OSTI)

... range of work carried out at the Radio Research Station, Slough, and at the substation in Singapore*.

W. J. G. BEYNON

1961-02-18T23:59:59.000Z

Note: This page contains sample records for the topic "wolc radio tower" 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

PS10 Solar Power Tower Xi Jing, Fang  

E-Print Network [OSTI]

the solar energy to the grid in 2007 Operating cash flow 1.4 millions in 2007.Operating cash flow 1PS10 Solar Power Tower Xi Jing, Fang #12;Overview Magnitudes , Cost & TechnologiesMagnitudes , Cost Technological ,Social Problems and PolicyTechnological ,Social Problems and Policy ChallengesChallenges #12

Prevedouros, Panos D.

122

Success for radio astronomy  

Science Journals Connector (OSTI)

......August 2000 news News Success for radio astronomy Jim Cohen of Jodrell Bank Observatory...mm-wave spectrum. As a result, radio astronomy is now officially allocated most of the...International Mobile Telecommunications). Radio astronomy made its gains in the mm-wave region......

Jim Cohen

2000-08-01T23:59:59.000Z

123

Microsoft Word - LakesideRadioStation_PropertyTransfer_CX.docx  

Broader source: Energy.gov (indexed) [DOE]

Joan Kendall Joan Kendall Project Manager, TERR-3 Proposed Action: Sale of Lakeside Radio Station Categorical Exclusion Applied (from Subpart D, 10 C.F.R. Part 1021): B1.24 - Property Transfers Location: Lakeside (Coos County), Oregon Proposed by: Bonneville Power Administration (BPA) Description of the Proposed Action: BPA proposes to sell a communications facility known as the Lakeside Radio Station to the Central Lincoln People's Utility District (Central Lincoln). Components of this facility include a building with air conditioning, a nitrogen tank, a communications tower, and easement rights for the building, three beam paths, and an access road. In 2008, BPA and Central Lincoln reached an agreement to transfer ownership of some of the

124

Radio Observations of High Redshift Radio Galaxies  

E-Print Network [OSTI]

We review some aspects of radio continuum polarimetric imaging of high redshift radio galaxies. The correlation between extreme values of Faraday rotation observed toward radio emitting structures in nearby radio galaxies, and X-ray emitting cluster atmospheres, is presented as a method for targeting objects at high redshift for deep X-ray searches. We present an X-ray detection of the extreme rotation measure radio galaxy PKS 1138-262 at z = 2.156, and we argue that the X-ray emission is from a cluster atmosphere with a luminosity of 1.7x10^{44} h^{-2} ergs sec^{-1}. We also present results on the correlation between size and redshift for a sample of ultra-luminous radio galaxies between 0 < z < 4.3. Source sizes decrease systematically with redshift, suggesting either denser environments, or younger sources, at high redshift. An alternative explanation is significant inverse Compton losses off the microwave background at high redshift.

C. L. Carilli; H. J. A. Rottgering; G. K. Miley L. Pentericci; D. E. Harris

1998-02-18T23:59:59.000Z

125

Tower City, North Dakota: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

Tower City, North Dakota: Energy Resources Tower City, North Dakota: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 46.9227548°, -97.6739889° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":46.9227548,"lon":-97.6739889,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

126

Microsoft Word - Final_NineCanyon_CommunicationTowerInstall_CX  

Broader source: Energy.gov (indexed) [DOE]

1, 2013 1, 2013 REPLY TO ATTN OF: KEC-4 SUBJECT: Environmental Clearance Memorandum Kelly Gardner, PMP Project Manager, TEP-TPP-1 Proposed Action: Nine Canyon Substation Communication Tower Addition: 331800 McNary Sub Bus Tie Relay Replacements and 310427 McNary-Badger Canyon Transfer Trip Install Categorical Exclusion Applied (from Subpart D, 10 C.F.R. Part 1021): B4.6 - Additions and modifications to transmission facilities Location: Kennewick, Benton County, Washington Proposed by: Bonneville Power Administration (BPA) Description of the Proposed Action: BPA proposes to install a 60-foot communications tower and associated communication equipment at the Benton County Public Utility District's Nine Canyon Substation in Benton County, Washington. The upgrade would involve replacing the

127

Geometry of tower-type solar electric station heliostat field  

SciTech Connect (OSTI)

A general method is presented for calculating the angular positions of an arbitrary heliostat at an arbitrary position in a heliostat field surrounding a tower-type solar electric station as a function of solar position. A system of angular coordinates is used which rotates with the solar azimuth direction around the collecting tower, resulting in an expression for the proper orientation of heliostat mirrors that is independent of local latitude, solar declination and time of day. The lines on the horizontal plane of the heliostat field characterized by the same values of the angles governing the horizontal inclination of the corresponding heliostat for a given solar elevation form two families of hyperbolas with vertexes facing the center of the field. Such isoline drawings constructed from the calculations may be used to determine the limiting values of the heliostat angles during the daily and seasonal course of operation of the heliostat facility.

Tepliakov, D.I.; Aparisi, R.R.

1980-01-01T23:59:59.000Z

128

Cooling Tower Energy Conservation Through Hydraulic Fan Drives  

E-Print Network [OSTI]

Fan Drive Eliminates These Problems from the Drive Train. The electric motor is at ground level; close coupled to a hydraulic pump, filters and oil reservoir. Hydraulic lines bring oil flow to the lightweight hydraulic motor mounted at the fan... Tower Fan Drives Are Many: It removes the hazard of costly fan wrecks and shaft coupling breakage. It eliminates gearbox maintenance, breakdown or replacement. The electric motor is mounted with the reservoir and pump at ground level for ease...

Dickerson, J.

129

A study of a cooling tower with variable packing geometries  

E-Print Network [OSTI]

of the Meohanioal Engineering Department~ for giving generously of his time, advioey and experi ense. STMKRY Three redwood packing styles -- rectangular~ square and triangular, having the same projected, area ? were tested under the same controlled conditions... of this wozk is to study the influence of the paoking geometries on water cooling tower performance oh raoteristics. To fulfill the purpose, thz ee different redwood paoking , . eometz'ies were tested and oompared. These ere z ectangular, square...

Azad, Abul Kalam

2012-06-07T23:59:59.000Z

130

Energy (Cost) Savings by Zero Discharge in Cooling Towers  

E-Print Network [OSTI]

. Relatively clean water may be added directly to the cooling tower basin (see Figure n. Reuse streams containing high suspended solids but of otherwise acceptable quality may be input just before the filters ~n the J The remainingireuse The flowrate..., silica, phos phates, and suspended solids. Other potential foulants and scale-forming species must be controlled by inhibitors or removed by an additional process in the sidestream treatment. Waste streams with scaling and corrosion potential before...

Matson, J. V.; Gardiner, W. M.; Harris, T. G.; Puckorius, P. R.

1982-01-01T23:59:59.000Z

131

Variable Frequency AC Drives for Cooling Tower Energy Efficiency  

E-Print Network [OSTI]

and economics. Automatic fan speed control by sensing cold water temperature is the economic essence of the application of adjustable frequency power to A-C fan motors. 2.2 Cell Partitions In some multi-cell mechanical-draft cooling towers, the isolation... of individual cell air streams is ineffective due to one or more of the following: --Partitions are missing. --Partitions are incomplete. This condition results in temperature control problems. For example, if constant CWT is desired, and no means...

Corey, R. W.

1982-01-01T23:59:59.000Z

132

EIA Radio test  

U.S. Energy Information Administration (EIA) Indexed Site

September 10, 2012 September 10, 2012 Test of Energy News Radio Service This is a test audio file of the U.S. Energy Information Administration's energy news radio service to be launched on Tuesday, September 11 th with the release of EIA's monthly Short-Term Energy Outlook. EIA's radio service will provide free short broadcast stories on EIA energy data reports and analysis to radio stations nationwide. The stories will be recorded in MP3 format and can be downloaded from EIA's radio service webpage at www.eia.gov/radio. The first broadcast stories will be posted around noon Eastern Time on Sept. 11 after the release of EIA's monthly Short Term Energy Outlook forecast. These initial stories will focus on the outlook for U.S. gasoline prices, crude oil production and natural gas production.

133

Frequencies for Radio Astronomy  

Science Journals Connector (OSTI)

... must therefore be achieved through the combined action of three international scientific unions, IAU (astronomy), COSPAR (space) and URSI (radio), which jointly delegate members to an ... jointly delegate members to an Inter-Union Commission for the Allocation of Frequencies for Radio Astronomy and Space Science (IUCAF). This Commission discusses the scientific case for protecting various ...

F. G. SMITH

1970-10-31T23:59:59.000Z

134

Telecommunications Radio Lease  

E-Print Network [OSTI]

Telecommunications Radio Lease 1. Fax completed form to 979.847.1111. 2. If you do not receive to any of the radios, chargers and accessories until signed back over to the Telecommunications office Telecommunications Office Use Only Service Due Date Installation Cost (NRC) Billed To Telephone/Circuit Number

135

Telecommunications Radio Rental  

E-Print Network [OSTI]

Telecommunications Radio Rental 1. Fax completed form to 979.847.1111. 2. If you do not receive of the radios, chargers and accessories until signed back over to the Telecommunications office. Amount Work Order Prepared Departmental Approval Signature Date Service Date Desired Telecommunications Office

136

Stabilized radio frequency quadrupole  

DOE Patents [OSTI]

Disclosed is a long-vane stabilized radio frequency resonator for accelerating charged particles and including means defining a radio frequency resonator cavity, a plurality of long vanes mounted in the defining means for dividing the cavity into sections, and means interconnecting opposing ones of the plurality of vanes for stabilizing the resonator. 5 figs.

Lancaster, H.D.; Fugitt, J.A.; Howard, D.R.

1984-12-25T23:59:59.000Z

137

Smart Radio Spectrum Management for Cognitive Radio  

E-Print Network [OSTI]

Today's wireless networks are characterized by fixed spectrum assignment policy. The limited available spectrum and the inefficiency in the spectrum usage necessitate a new communication paradigm to exploit the existing wireless spectrum opportunistically. Cognitive radio is a paradigm for wireless communication in which either a network or a wireless node changes its transmission or reception parameters to communicate efficiently avoiding interference with licensed or unlicensed users. In this work, a fuzzy logic based system for spectrum management is proposed where the radio can share unused spectrum depending on some parameters like distance, signal strength, node velocity and availability of unused spectrum. The system is simulated and is found to give satisfactory results.

Bhattacharya, Partha Pratim; Gera, Rishita; Agarwal, Anjali

2011-01-01T23:59:59.000Z

138

Surface and Tower Meteorological Instrumentation at Atqasuk (METTWR2H) Handbook  

SciTech Connect (OSTI)

The Atqasuk meteorology station (AMET) uses mainly conventional in situ sensors to measure wind speed, wind direction, air temperature, dew point, and humidity mounted on a 10-m tower. It also obtains barometric pressure, visibility and precipitation data from sensors at or near the base of the tower. In addition, a chilled mirror hygrometer (CMH) is located at 1 m for comparison purposes. Temperature and relative humidity (RH) probes are mounted at 2 m and 5 m on the tower.

Ritsche, MT

2006-01-01T23:59:59.000Z

139

An investigation of design alternatives for 328-ft (100-m) tall wind turbine towers.  

E-Print Network [OSTI]

??As wind turbines are continued to be placed at higher elevations, the need for taller wind turbine towers becomes necessary. However, there are multiple challenges (more)

Lewin, Thomas James

2010-01-01T23:59:59.000Z

140

Structural Analyses of Wind Turbine Tower for 3 kW Horizontal Axis Wind Turbine.  

E-Print Network [OSTI]

?? Structure analyses of a steel tower for Cal Poly's 3 kW small wind turbine is presented. First, some general design aspects of the wind (more)

Gwon, Tae gyun (Tom)

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "wolc radio tower" 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

Performance characteristics of an induced draft, counterflow, spray cooling tower  

E-Print Network [OSTI]

V Total mass transfer coefi'icient, pounds of water per hour per square Zoot per pound of vapor per pound of dry air Tower characteristic Number of nozzles used XX SURVEY OF LXTERATUHE The currently accepted theory of heat and mass exchange between... a stream of' water droplets and a stream of unsatu rated air was first proposed by Robinson (8)o in 1MS, and, ln 19S5$ by Waker g Lewi s y and 5!cAdams ( 1 ) . Al so in 1985, -gerlrel (5), using the same basic equations somewhat moxe rigorously...

Jones, Charles Edward

2012-06-07T23:59:59.000Z

142

A study of a cooling tower with variable packing heights  

E-Print Network [OSTI]

I, tower of eight feet by ei, . ht feet section. . W. W. Smith (18) reported in 1&56, his results and con- clusions for mass transfer and resistance to air flow for three redwood packihg styles having essent1ally the same vert1cal projected area, made... the time to ~efinitel. ?; sta. e that the redwood packing of re tangulor section (width-hei~ht ratio '). g(~) is the best packin? typo. 'Ihe field is till open for experimentation with packings of other avail, ble mat- erials and packins f...

Khan, A. M. M. Farid

2012-06-07T23:59:59.000Z

143

Power Towers of String Instantons for N=1 Vacua  

E-Print Network [OSTI]

We provide arguments for the existence of novel hereinafter called poly-instanton corrections to holomorphic couplings in four-dimensional N=1 supersymmetric string compactifications. After refining quantitatively the D-brane instanton calculus for corrections to the gauge kinetic function, we explicitly apply it to the Type I toroidal orbifold defined in arXiv:0710.3080 and compare the results to the proposed heterotic S-dual model. This leads us to the intriguing conclusion that N=1 string vacua feature a power tower like proliferation of instanton corrections.

Ralph Blumenhagen; Maximilian Schmidt-Sommerfeld

2008-03-11T23:59:59.000Z

144

Low Cost Radio Telescope  

Science Journals Connector (OSTI)

A radio interferometer has been constructed at Haverford College as an aid to learning the fundamentals of radio astronomy. Its cost both in cash outlay and in construction time make it a feasible year-long project for an undergraduate. Its simplicity does not prevent it from being a useful instrument for instruction at the college or high-school level; among its capabilities are the measurement of the positions of at least four of the strongest discrete cosmic-noisesources and the diameter of the radio sun.

Joseph H. Taylor Jr.

1964-01-01T23:59:59.000Z

145

CRAF Handbook for Radio Astronomy  

E-Print Network [OSTI]

CRAF Handbook for Radio Astronomy EUROPEAN SCIENCE FOUNDATION Committee on Radio Astronomy. It represents all scientific disciplines: physical and engineering sciences, life, earth and environmental Handbook for Radio Astronomy, 3rd edition". #12;CRAF Handbook for Radio Astronomy Edited by Jim Cohen

Rodriguez, Luis F.

146

Coagulation chemistries for silica removal from cooling tower water.  

SciTech Connect (OSTI)

The formation of silica scale is a problem for thermoelectric power generating facilities, and this study investigated the potential for removal of silica by means of chemical coagulation from source water before it is subjected to mineral concentration in cooling towers. In Phase I, a screening of many typical as well as novel coagulants was carried out using concentrated cooling tower water, with and without flocculation aids, at concentrations typical for water purification with limited results. In Phase II, it was decided that treatment of source or make up water was more appropriate, and that higher dosing with coagulants delivered promising results. In fact, the less exotic coagulants proved to be more efficacious for reasons not yet fully determined. Some analysis was made of the molecular nature of the precipitated floc, which may aid in process improvements. In Phase III, more detailed study of process conditions for aluminum chloride coagulation was undertaken. Lime-soda water softening and the precipitation of magnesium hydroxide were shown to be too limited in terms of effectiveness, speed, and energy consumption to be considered further for the present application. In Phase IV, sodium aluminate emerged as an effective coagulant for silica, and the most attractive of those tested to date because of its availability, ease of use, and low requirement for additional chemicals. Some process optimization was performed for coagulant concentration and operational pH. It is concluded that silica coagulation with simple aluminum-based agents is effective, simple, and compatible with other industrial processes.

Nyman, May Devan; Altman, Susan Jeanne; Stewart, Tom

2010-02-01T23:59:59.000Z

147

Sloped-collector solar updraft tower power plant performance  

Science Journals Connector (OSTI)

Abstract A mathematical model describing fluid flow, heat transfer and pressure distribution inside a sloped-collector solar updraft tower power plant (SCSUTPP) is presented by assuming a steady compressible flow. Compared to conventional horizontal-collector solar updraft tower power plants (HCSUTPPs), the performance of SCSUTPP is comprehensively studied based on the mathematical model. The power outputs for SCSUTPP and HCSUTPP using the essential expression of driving force are respectively compared with those using the driving force expressions containing no integral, as proposed in literature. Results show that the expression containing no integral is accurate for HCSUCPP based on a compressible fluid model. The expression containing no integral is not accurate for predicting the driving force of SCSUTPP based on an incompressible fluid model when no variation of the atmospheric density with heights and no variation of difference of the atmospheric density and the density of the current inside the short SUT with heights are assumed. The gravitational effect has to be considered for predicting the SCSUTPP performance. The results show that the pressure potential and the power production of an SCSUCPP with a collector of 848m height and a vertical SUT 123m high lies between those for two \\{HCSUCPPs\\} respectively with vertical \\{SUTs\\} 547m and 971m high. This work lays a good foundation for accurate predication of potential power produced from SCSUTPP.

Xinping Zhou; Shuo Yuan; Marco Aurlio dos Santos Bernardes

2013-01-01T23:59:59.000Z

148

Probabilistic Analysis of Power Tower Systems to Achieve Sunshot Goals  

Science Journals Connector (OSTI)

Abstract The U.S. Department of Energy's (DOE) SunShot goal seeks to reduce the levelized cost of energy (LCOE) for solar energy technologies to $0.06/kWh. A number of cost and technical performance targets for various concentrating solar power (CSP) components have been issued by the DOE to meet the SunShot goals for CSP. This paper presents probabilistic analyses of the LCOE for a 100 \\{MWe\\} power tower system with inherent cost and performance uncertainties. Previous results show that while CSP systems are likely to meet the cost target necessary to compete broadly in U.S. markets, there is a very low probability of reaching an LCOE of $0.06/kWh if parameter uncertainty distributions are used that range from current cost and performance values to the current DOE targets. This work investigates additional parameter distributions using new cost and technical targets to determine performance and cost scenarios for power tower systems that yield finite probabilities of achieving $0.06/kWh. Starting with the baseline uncertainty distributions, the minimum (or maximum) value for each uncertain parameter was improved by ?50% and ?75%. Results show that the probability of achieving an LCOE of $0.06/kWh increases to 15% and 46%, respectively, with these new cost and technical targets.

C. Ho; M. Mehos; C. Turchi; M. Wagner

2014-01-01T23:59:59.000Z

149

Comparative life cycle assessment of tubular wind towers and foundations Part 2: Life cycle analysis  

Science Journals Connector (OSTI)

Abstract In the first part of the paper the design of tubular towers and respective onshore foundations was addressed. The considered solutions were based on steel, concrete and hybrid steel-concrete tubular towers supporting multi-megawatt turbines of 2, 3.6 and 5MW power with hub heights of 80, 100 and 150m respectively. In this second part of the paper, the life cycle analysis of the designed case studies is performed and conclusions about their environmental impact are drawn. Two different scenarios concerning the lifetime of the towers were established. The first scenario considers 20years lifetime and two different construction methods for the connection of the steel segments, the first based in current technology using flange connections and the second using newly developed friction connections. Assuming equal importance for all environmental categories in this scenario, it may be concluded that for heights up to 100m hybrid towers with friction connections are the most efficient solution. For higher heights, the concrete tower becomes more efficient. The second scenario considers an increased total lifetime of 40years, assuming the reuse of the tower after 20years of operation. In this case, the use of friction connections in steel towers enhances the possibility of dismantling and reusing the tower potentiating much better performance in relation to the environmental category of global warming.

H. Gervsio; C. Rebelo; A. Moura; M. Veljkovic; L. Simes da Silva

2014-01-01T23:59:59.000Z

150

LQG control of horizontal wind turbines for blades and tower loads alleviation  

E-Print Network [OSTI]

LQG control of horizontal wind turbines for blades and tower loads alleviation A. Pintea*, N of power produced by two bladed horizontal variable speed wind turbines. The proposed controller ensures oscillations and with the tower bending tendency. Keywords: LQG control, Wind turbines, Multi-objective control

Paris-Sud XI, Université de

151

The Use of Tall Tower Field Data for Estimating Wind Turbine Power Performance , J. Chapman1  

E-Print Network [OSTI]

The Use of Tall Tower Field Data for Estimating Wind Turbine Power Performance A. Swift1 , J wind speed measurements on the TTU WISE 200m and 78m towers. A hypothetical wind turbine is shown. At potential wind turbine sites, it is uncommon to have wind measurements available at multiple heights. Then

Manuel, Lance

152

Well-posedness and controllability of a wind turbine tower model  

Science Journals Connector (OSTI)

......the tower is uniform. Keywords: wind turbine tower; coupled system; SCOLE...aim of this paper is to develop a wind turbine model in the plane of the turbine...force and torque control. Large offshore turbines are subjected to severe......

Xiaowei Zhao; George Weiss

2011-03-01T23:59:59.000Z

153

Shake Table Test on the 1:30 Model Structure of a Large Cooling Tower for Fire Power Plant  

Science Journals Connector (OSTI)

For understanding the seismic behaviour of extra-large scale cooling tower with dimension of 220 meters high and 188 meters in diameter, the shake table tests for its 1:30 (length ratio) tower model were carr...

J. W. Dai; X. R. Weng; Y. Hu

2014-01-01T23:59:59.000Z

154

Thermal performance upgrade of the Arkansas Nuclear One cooling tower: A ``root cause`` analysis approach  

SciTech Connect (OSTI)

The thermal performance efficiency of the natural draft cooling tower at Entergy Operations` 858 MWe Arkansas Nuclear One, Unit 2 was successfully upgraded to 101% of design performance capability in April 1994 as the end result of a unique root-cause analysis of the cooling tower`s long-standing performance deficiencies. Through application of state-of-the-art diagnostic testing methods and computer modeling techniques, Entergy was able to identify and correct air/water maldistribution problems in the 447 foot tall counterflow cooling tower at minimal cost. Entergy estimates that the savings realized, as a result of the 1.2 F reduction in cooling tower outlet water temperature, will pay for the thermal upgrade project in approximately 14 months.

Liffick, G.W. [Entergy Operations, Inc., Russellville, AR (United States); Cooper, J.W. Jr. [John Cooper and Associates, Tampa, FL (United States)

1995-10-01T23:59:59.000Z

155

Coupled dynamics of a tower with an elevated wave tank. Part 1: Equations of motion and eigenoscillations  

E-Print Network [OSTI]

Coupled dynamics of a tower with an elevated wave tank. Part 1: Equations of motion problem is derived to describe coupled dynamics of a tower with an elevated tank on the tower top, elevated tanks, Ritz'-Treftz method 1. INTRODUCTION Modeling the dynamic behavior of elevated liquid

156

Radio and Spectrum Management | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Radio and Spectrum Management Radio and Spectrum Management DOE Radio and Spectrum Workshop 43.pdf More Documents & Publications ICAM Workshop Ad Hoc Meetings Spectrum Technology...

157

Cognitive Radio Networks as Sensor Networks  

E-Print Network [OSTI]

is used, assuming the cognitive radios know their ownfor Embedded Networked Sensing Cognitive Radio Networks AsJ. Pottie Introduction: Cognitive Radio (CR) Networks The

Bandari, Dorna; Yang, Seung R.; Zhao, Yue; Pottie, Gregory

2007-01-01T23:59:59.000Z

158

Zoning for Small Wind: The Importance of Tower Height  

Wind Powering America (EERE)

1 1 Zoning for Small Wind: The Importance of Tower Height An ASES Small Wind Webinar Mick Sagrillo-Wisconsin's Focus on Energy © 2008 by Mick Sagrillo 2 Definitions: rotor L&S Tech. Assoc., Inc. Rotor = "collector" for a wind system 3 Definitions: wind * Wind = the 'fuel' * Wind has two 'components' - Quantity = wind speed (velocity or V) - Quality = 'clean' flowing wind 4 Quantity * = average annual wind speed * Climate, not weather * Akin to annual average sun hours for PV or head and flow for hydro * Wind speed increases with height above ground... * ...Due to diminished ground drag (friction) 5 Power in the wind V³ * Wind speed = V * Power available is proportional to wind speed x wind speed x wind speed - or P ~ V x V x V - or P ~ V ³ * Therefore, 10% V = 33% P * Lesson !

159

Solar two: A molten salt power tower demonstration  

SciTech Connect (OSTI)

A consortium of United States utility concerns led by the Southern California Edison Company (SCE) is conducting a cooperative project with the US Department of Energy (DOE), Sandia National Laboratories, and industry to convert the 10-MW Solar One Power Tower Pilot Plant to molten nitrate salt technology. The conversion involves installation of a new receiver, a new thermal storage system, and a new steam generator; it utilizes Solar One`s heliostat field and turbine generator. Successful operation of the converted plant, called Solar Two, will reduce economic risks in building initial commercial power tow projects and accelerate the commercial acceptance of this promising renewable energy technology. The estimated cost of Solar Two, including its three-year test period, is $48.5 million. The plant will begin operation in early 1996.

Tyner, C.E. [Sandia National Labs., Albuquerque, NM (United States); Sutherland, J.P. [Southern California Edison, Rosemead, CA (United States); Gould, W.R. Jr. [Bechtel Corp., San Francisco, CA (United States)

1995-08-01T23:59:59.000Z

160

Operating characteristics of a spray tower for cooling gas at moderate temperatures  

E-Print Network [OSTI]

of multiport gas burners was placed. The top of the tower was fitted with an adapter, a square duct elbow and a reducing duct tying the top of the tower to a cyclone separator. A circular 12-inch elbow out of the top of the cyclone separator led to a venturi..., in the inlet-gas 11 stream, in the outlet-gas stream and in the ventur1. Wet bulb tempera- tures were obtained at top of tower and in the venturi by mercury-column thermometers fitted with wicks. Water-and gas-flow rates were measured by calibrated...

Legler, Bobby

2012-06-07T23:59:59.000Z

Note: This page contains sample records for the topic "wolc radio tower" 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

Improvement of risk estimate on wind turbine tower buckled by hurricane  

E-Print Network [OSTI]

Wind is one of the important reasonable resources. However, wind turbine towers are sure to be threatened by hurricanes. In this paper, method to estimate the number of wind turbine towers that would be buckled by hurricanes is discussed. Monte Carlo simulations show that our method is much better than the previous one. Since in our method, the probability density function of the buckling probability of a single turbine tower in a single hurricane is obtained accurately but not from one approximated expression. The result in this paper may be useful to the design and maintenance of wind farms.

Li, Jingwei

2013-01-01T23:59:59.000Z

162

Cognitive Radio: Fundamentals and Opportunities  

E-Print Network [OSTI]

Cognitive Radio: Fundamentals and Opportunities Robert H. Morelos-Zaragoza Department of Electrical Engineering San Jose State University October 12, 2007 #12;Cognitive Radio - RHMZ - 2007 Slide 2 of 18 Outline. Cognitive radio (CR) a) Definition and overview (Mitola) b) CR features (FCC) 3. Unlicensed TV spectrum

Morelos-Zaragoza, Robert H.

163

Electronics, Radio and Telecommunications  

Science Journals Connector (OSTI)

... a grant-in-aid from the United States National Science Foundation. One of these is Telecommunications (No. 1, 1957. Pp. 1-94. First English issue. Issued in ... the official publication of the A. S. Popov Technical Society of Radio Engineering and Telecommunications. ...

1958-10-11T23:59:59.000Z

164

BREN Tower comes tumbling down as world record is set | National Nuclear  

National Nuclear Security Administration (NNSA)

BREN Tower comes tumbling down as world record is set | National Nuclear BREN Tower comes tumbling down as world record is set | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Home > NNSA Blog > BREN Tower comes tumbling down as world ... BREN Tower comes tumbling down as world record is set Posted By Office of Public Affairs NNSA Blog Some 345 tons of steel came tumbling down yesterday as a world

165

Lab Helps FAA Build Energy-Efficient Control Towers | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Lab Helps FAA Build Energy-Efficient Control Towers Lab Helps FAA Build Energy-Efficient Control Towers Lab Helps FAA Build Energy-Efficient Control Towers April 23, 2010 - 10:57am Addthis With help from the Pacific Northwest National Laboratory and its subcontractor, Redhorse Corporation, the agency that keeps our country's airports running is bolstering its energy efficiency. The Federal Aviation Administration is developing building plans that save energy - and money - at five airports in the western U.S. Government agencies are required by law to audit their buildings, so the FAA saw some Recovery Act funding as an opportunity to help fund its energy audits. Air traffic control towers are a vital service for travelers, keeping air traffic free of accidents. Their accompanying base buildings house administrative offices and support systems.

166

Wind tunnel simulation of wind effect on a group of high Cooling towers  

Science Journals Connector (OSTI)

Aerodynamic interference between high cooling towers in the atmospheric boundary layer (ABL) and uniform flow has been discussed. For the 1/1000 ABL model set up in the 2.25m low speed wind tunnel at Peking Unive...

Yan Dachun; Li Chenxin

1987-02-01T23:59:59.000Z

167

Beyond the ivory tower : in search of a new form for campus-community relationships  

E-Print Network [OSTI]

The terms "ivory tower" and "town-gown" have long been used to characterize the relationship between institutions of higher education and the communities in which they reside. While these adversarial phrases reflect the ...

Bowman, Anne (Anne Renee)

2011-01-01T23:59:59.000Z

168

The Binary Cooling Tower Process: An Energy Conserving Water Reuse Technology  

E-Print Network [OSTI]

The Binary Cooling Tower (BCT) harnesses cooling system waste heat to accomplish concentration of waste and process streams. The BCT can also be integrated to isolate and improve the efficiency of critical cooling loops. This paper describes the BCT...

Lancaster, R. L.; Sanderson, W. G.; Cooke, R. L., Jr.

1981-01-01T23:59:59.000Z

169

WATTS TOWERS: THE EFFECTS OF THERMAL CYCLES ON THE FORMATION AND BEHAVIOR OF CRACKS  

E-Print Network [OSTI]

to make lasting repairs to the Watts Towers. 15 REFERENCES [1] LSTC. "LS-DYNA KEYWROD MANUAL." DYNA Support. Livermore Software Technology Corporation, n.d. Web. 5 Apr. 2013.

Spencer, Matthew T

2013-02-06T23:59:59.000Z

170

Microsoft Word - CX-Driscoll-Naselle-TowerMove-FY13_WEB.doc  

Broader source: Energy.gov (indexed) [DOE]

3 REPLY TO ATTN OF: KEPR-4 SUBJECT: Environmental Clearance Memorandum Stacie Hensley Project Manager - TEP-TPP-4 Proposed Action: Driscoll-Naselle No. 1 Tower Relocation Project...

171

"BECAUSE SOME STORIES DO LIVE FOREVER": STEPHEN KING'S THE DARK TOWER SERIES AS MODERN ROMANCE  

E-Print Network [OSTI]

Stephen King's Dark Tower series is a seven-volume work that contains elements from myths, fairy tales, American westerns, legends, popular culture, Gothic literature, and medieval romance. Few scholars have engaged with ...

McMurray, Rachel Elizabeth

2012-05-31T23:59:59.000Z

172

Data Center Economizer Cooling with Tower Water; Demonstration of a Dual Heat Exchanger Rack Cooling Device  

E-Print Network [OSTI]

LBNL-XXXXX Data Center Economizer Cooling with Tower Water;included a water- side economizer. This model estimated theand without a water-side economizer and including or not

Greenberg, Steve

2014-01-01T23:59:59.000Z

173

Exquisite corpse: a tower for the public in the era of exhausted modernity  

E-Print Network [OSTI]

Towers in Manhattan, especially in business areas, have historically used a single overarching system in order to visualize images of their corporate identity and immerse the public in the image of development. While using ...

Jang, Sungwoo

2012-01-01T23:59:59.000Z

174

Meteorological Impacts of the Cooling Tower of the Goesgen Nuclear Power Plant  

Science Journals Connector (OSTI)

The main meteorological effect due to the Gsgen cooling tower is, in fact, the reduction ... near vicinity (12 km) of the power station. A network of five cinecameras provides ... on 23 points in the vicinity o...

Daniel A. Schneiter

1987-01-01T23:59:59.000Z

175

BREN Tower comes tumbling down as world record is set | National Nuclear  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

BREN Tower comes tumbling down as world record is set | National Nuclear BREN Tower comes tumbling down as world record is set | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Home > NNSA Blog > BREN Tower comes tumbling down as world ... BREN Tower comes tumbling down as world record is set Posted By Office of Public Affairs NNSA Blog Some 345 tons of steel came tumbling down yesterday as a world

176

Times Square Buildings Cond Nast Building Reuters Building Ernst & Young Building Times Square Tower  

Science Journals Connector (OSTI)

NEW YORKS Urban Development Corporations plan for Times Square called for four antiurbanistic office towers by Philip Johnson and John Burgee to stand guard like cops on the beat over what was viewed as a sq...

2005-01-01T23:59:59.000Z

177

24 M meteorological tower data report period: January--December, 1994  

SciTech Connect (OSTI)

This report was prepared by the Desert Research Institute (DRI) for the U.S. Department of Energy (DOE). It summarizes meteorological data collected at the 24 meter tower at the Nevada Test Site Hazardous Material Spill Center (HAZMAT) located at Frenchman Flat near Mercury, Nevada, approximately 75 miles northwest of Las Vegas, Nevada. The tower was originally installed in July, 1993 to characterize baseline conditions for an EPA sponsored experimental research program at the HAZMAT.

Freeman, D.; Bowen, J.; Egami, R. [and others] [and others

1997-08-01T23:59:59.000Z

178

Vertical sampling flights in support of the 1981 ASCOT cooling tower experiments: field effort and data  

SciTech Connect (OSTI)

During the month of August 1981, three nights of experimental sampling of tracers released into the cooling tower plume of a geothermal power plant were conducted. In these experiments a tethered balloon was used to lift a payload so as to obtain vertical profiles of the cooling tower plume and the entrained tracers. A description of the equipment used, the field effort and the data acquired are presented here.

Gay, G.T.

1982-03-01T23:59:59.000Z

179

Surface and Tower Meteorological Instrumentation at Barrow (METTWR4H) Handbook  

SciTech Connect (OSTI)

The Barrow meteorology station (BMET) uses mainly conventional in situ sensors mounted at four different heights (2m, 10m, 20m and 40m) on a 40 m tower to obtain profiles of wind speed, wind direction, air temperature, dew point and humidity. It also obtains barometric pressure, visibility and precipitation data from sensors at the base of the tower. Additionally, a Chilled Mirror Hygrometer and an Ultrasonic wind speed sensor are located near the 2m level for comparison purposes.

Ritsche, MT

2008-04-01T23:59:59.000Z

180

Performance of molten salt solar power towers in Chile  

Science Journals Connector (OSTI)

Chile is facing important challenges to develop its energy sector. Estimations demonstrate that in its electricity consumption Chile will grow at an annual rate of 4.6% until 2030 despite ongoing efficiency improvements. To satisfy this demand in a sustainable way the national energy policy promotes the integration of novel and clean power generation into the national power mix with special emphasis on concentrated solar power (CSP). The present paper assesses the development of solar-based electricity generation in Chile by CSP achieved by a Solar Power Tower plant (SPT) using molten salt as heat carrier and store. Such SPTs can be installed at different locations in Chile and connected to the main national grid. Results show that each SPT plant can generate around 76 GWh el of net electricity when considering solar irradiation as the sole energy source and at a 16% overall efficiency of the SPT process. For operation in a continuous mode a hybrid configuration with integrated gas backup system increases the generating potential of each SPT to 135 GWh el . A preliminary Levelized Energy Cost (LEC) calculation provides LEC values between 0.15 and 0.18 $/kWh as function of the overall process efficiency and estimated investment cost. Chile's solar irradiation favors the implementation of SPT plants.

G. Cceres; N. Anrique; A. Girard; J. Degrve; J. Baeyens; H. L. Zhang

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "wolc radio tower" 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.


181

MULTIMOMENT RADIO TRANSIENT DETECTION  

SciTech Connect (OSTI)

We present a multimoment technique for signal classification and apply it to the detection of fast radio transients in incoherently dedispersed data. Specifically, we define a spectral modulation index in terms of the fractional variation in intensity across a spectrum. A signal whose intensity is distributed evenly across the entire band has a lower modulation index than a spectrum whose intensity is localized in a single channel. We are interested in broadband pulses and use the modulation index to excise narrowband radio frequency interference by applying a modulation index threshold above which candidate events are removed. The technique is tested both with simulations and using data from known sources of radio pulses (RRAT J1928+15 and giant pulses from the Crab pulsar). The method is generalized to coherent dedispersion, image cubes, and astrophysical narrowband signals that are steady in time. We suggest that the modulation index, along with other statistics using higher order moments, should be incorporated into signal detection pipelines to characterize and classify signals.

Spitler, L. G.; Cordes, J. M.; Chatterjee, S. [Astronomy Department and NAIC, Cornell University, Ithaca, NY 14853 (United States); Stone, J., E-mail: lspitler@astro.cornell.edu [Department of Physics and Astronomy, Barnard College, New York, NY 10027 (United States)

2012-04-01T23:59:59.000Z

182

Radio Astronomy Fundamentals I John Simonetti  

E-Print Network [OSTI]

Radio Astronomy Fundamentals I John Simonetti Spring 2012 Radio astronomy provides a very different view of the universe than optical astronomy. Radio astronomers and optical astronomers use astronomy. Radio astronomers talk about sources of radio emission. Cas A is a strong source, for example

Ellingson, Steven W.

183

A new design of wind tower for passive ventilation in buildings to reduce energy consumption in windy regions  

Science Journals Connector (OSTI)

Abstract In todays world, the significance of energy and energy conservation is a common knowledge. Wind towers can save the electrical energy used to provide thermal comfort during the warm months of the year, especially during the peak hours. In this paper, we propose a new design for wind towers. The proposed wind towers are installed on top of the buildings, in the direction of the maximum wind speed in the region. If the desired wind speed is accessible in several directions, additional wind towers can be installed in several positions. The proposed wind tower can also rotate and set itself in the direction of the maximum wind speed. In the regions where the wind speed is low, to improve the efficiency of the system a solar chimney or a one-sided wind tower can be installed in another part of the building in the opposite direction. Using transparent materials in the manufacturing of the proposed wind towers improves the use of natural light inside the building. The major advantage of wind towers is that they are passive systems requiring no energy for operation. Also, wind towers reduce electrical energy consumption and environmental pollution.

A.R. Dehghani-sanij; M. Soltani; K. Raahemifar

2015-01-01T23:59:59.000Z

184

basic exchange telecommunications radio service  

Science Journals Connector (OSTI)

A service that extends telecommunications service to rural, outlying, and remote...Common abbreviation BETRS. Note: In the basic exchange telecommunications radio service (BETRS), the (a)....

2001-01-01T23:59:59.000Z

185

24 m meteorological tower data report period: January through December, 1995  

SciTech Connect (OSTI)

This report was prepared by the Desert Research Institute (DRI) for the US Department of Energy (DOE). It summarizes meteorological data collected at the 24 meter tower at the Nevada Test Site Hazardous Material Spill Center (HAZMAT) located at Frenchman Flat near Mercury, Nevada, approximately 75 miles northwest of Las Vegas, Nevada. The tower was originally installed in July, 1993 to characterize baseline conditions for an EPA sponsored experimental research program at the HAZMAT. A previous report reported monitoring results for 1994. This report presents results of the monitoring for January--December, 1995, providing: a status of the measurement systems (including any quality assurance activities) during the report period and a summary of the meteorological conditions at the HAZMAT during the report period. The scope of the report is limited to summary data analyses and does not include extensive meteorological analysis. The tower was instrumented at 8 levels. Wind speed, wind direction, and temperature were measured at all 8 levels. Relative humidity was measured at 3 levels. Solar and net radiation were measured at 2 meters above the ground. Barometric pressure was measured at the base of the tower and soil temperature was measured near the base of the tower.

Freeman, D.; Bowen, J.B.; Egami, R.; Coulombe, W.; Crow, D.; Cristani, B.; Schmidt, S.

1997-12-01T23:59:59.000Z

186

Multiple Radios for Fast Rendezvous in Cognitive Radio Networks  

E-Print Network [OSTI]

--cognitive radio, blind rendezvous, channel hopping ! 1 INTRODUCTION WITH the traditional static spectrum managemen- t, a significant portion of the licensed spectrum is underutilized in most of time while the unlicensed spectrum is over-crowded due to the growing de- mand for wireless radio spectrum from exponen

Chu, Xiaowen

187

Multiple Radios for Effective Rendezvous in Cognitive Radio Networks  

E-Print Network [OSTI]

portions of the spectrum of the licensed users (or primary users, PUs). In cognitive radio networks (CRNs With the traditional static spectrum management, a majority of the licensed spectrum is underutilized in most of time while the unlicensed spectrum is over-crowded due to the growing demand for wireless radio spectrum from

Chu, Xiaowen

188

Brayton-Cycle Baseload Power Tower CSP System  

SciTech Connect (OSTI)

The primary objectives of Phase 2 of this Project were: 1. Engineer, fabricate, and conduct preliminary testing on a low-pressure, air-heating solar receiver capable of powering a microturbine system to produce 300kWe while the sun is shining while simultaneously storing enough energy thermally to power the system for up to 13 hours thereafter. 2. Cycle-test a high-temperature super alloy, Haynes HR214, to determine its efficacy for the systems high-temperature heat exchanger. 3. Engineer the thermal energy storage system This Phase 2 followed Wilsons Phase 1, which primarily was an engineering feasibility study to determine a practical and innovative approach to a full Brayton-cycle system configuration that could meet DOEs targets. Below is a summary table of the DOE targets with Wilsons Phase 1 Project results. The results showed that a Brayton system with an innovative (low pressure) solar receiver with ~13 hours of dry (i.e., not phase change materials or molten salts but rather firebrick, stone, or ceramics) has the potential to meet or exceed DOE targets. Such systems would consist of pre-engineered, standardized, factory-produced modules to minimize on-site costs while driving down costs through mass production. System sizes most carefully analyzed were in the range of 300 kWe to 2 MWe. Such systems would also use off-the-shelf towers, blowers, piping, microturbine packages, and heliostats. Per DOEs instructions, LCOEs are based on the elevation and DNI levels of Daggett, CA, for a 100 MWe power plant following 2 GWe of factory production of the various system components. Success criteria DOE targets Wilson system LCOE DOEs gas price $6.75/MBtu 9 cents/kWh 7.7 cents/kWh LCOE Current gas price $4.71/MBtu NA 6.9 cents/kWh Capacity factor 75% (6500hr) 75-100% Solar fraction 85% (5585hr) >5585hr Receiver cost $170/kWe $50/kWe Thermal storage cost $20/kWhth $13/kWhth Heliostat cost $120/m2 $89.8/m2

Anderson, Bruce

2013-12-31T23:59:59.000Z

189

radioCherenkov.dvi  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

. . Coherent radio Cherenkov radiation detectors: Revised February 2013 by S.R. Klein (LBNL/UC Berkeley) 100 10 10 -4 10 -3 10 -5 1.0 0.1 0.01 E 2 I(E ν ) [GeV m -2 s -1 sr -1 ] E ν [GeV] ν NuMoon 10 9 10 10 10 11 10 12 10 13 10 14 10 15 ATCA (no SSR) ATCA (SSR incl.) RICE ANITA Central GZK ν flux predictions Central GZK ν flux predictions Figure 1: Representative ν flux limits from radio-detection experiments, illustrating the energy ranges for different techniques. Shown are limits from the Rice, ANITA, NuMoon and Lunaska (ATCA) collaborations. NuMoon and Lunaska are low and high frequency lunar scans respectively, showing the strengths of the two different frequency bands. The two limits for ATCA are for different models of the lunar regolith; their separation is a measure of the resultant uncertainty. Also shown, for comparison is the mid-range of flux predictions

190

Microsoft Word - CX-SpringCreek-WineCountry-TowerRelocationFY13_WEB.doc  

Broader source: Energy.gov (indexed) [DOE]

November 29, 2012 November 29, 2012 REPLY TO ATTN OF: KEPR-4 SUBJECT: Environmental Clearance Memorandum Justin Estes Project Manager - TELM-TPP-3 Proposed Action: Spring Creek - Wine County No. 1 Transmission Tower Relocation Categorical Exclusion Applied (from Subpart D, 10 C.F.R. Part 1021): B4.6 Additions and modifications to transmission facilities Location: Multnomah County, OR Proposed by: Bonneville Power Administration (BPA) Description of the Proposed Action: BPA is proposing to relocate one transmission tower, located on private agricultural land, which has been damaged by farm equipment. Currently, tower 29/3 on BPA's Spring Creek - Wine Country No. 1 transmission line, resides on an agricultural access road that is bordered on both sides by active agricultural fields. This

191

The future for radio astronomy  

Science Journals Connector (OSTI)

......research-article Features The future for radio astronomy Rene P Breton Tom Hassall Rene P Breton and Tom Hassall, School of Physics and Astronomy, University of Southampton, UK; r...Tom Hassall argue that, while radio astronomy has always involved transient phenomena......

Rene P Breton; Tom Hassall

2013-12-01T23:59:59.000Z

192

Stabilized radio-frequency quadrupole  

DOE Patents [OSTI]

A long-vane stabilized radio frequency resonator for accelerating charged particles and including means defining a radio frequency resonator cavity, a plurality of long vanes mounted in the defining means for dividing the cavity into sections, and means interconnecting opposing ones of the plurality of vanes for stabilizing the resonator.

Lancaster, H.D.; Fugitt, J.A.; Howard, D.R.

1982-09-29T23:59:59.000Z

193

Cooperation in Cognitive Radio Networks  

Science Journals Connector (OSTI)

The operation of cognitive radio (CR) networks involves opportunistic access to the spectrum licensed to primary users (PUs) by secondary users (SUs). Traditionally, this access is performed in such a way that the PUs suffer minimal interference to their ... Keywords: cognitive radio networks, cooperation, cooperative relays

Pedro Smith Coutinho, Jos Ferreira de Rezende, Valmir Carneiro Barbosa

2014-05-01T23:59:59.000Z

194

Radio Monitoring Birds of Prey  

Science Journals Connector (OSTI)

Abstract This paper is a consideration of field techniques rather than of equipment design. The first of three parts reviews applications of radio monitoring in bird of prey studies, with suggestions concerning terminology. There has been some radio telemetry of activity and incubation parameters, but most monitoring of raptors has involved radio tracking. This has included location of birds for investigation of movements, ranges, habitat utilization and roost sites, but could also be used for surveillance of what birds were doing. The second section describes techniques used in radio surveillance of a particularly secretive raptor, the goshawk, and presents original data on prey selection which were collected during studies of predation on woodpigeons and pheasants. Finally, there is an outline of how selection data were combined with predation rate measurements and hawk density estimates, obtained using radio tags as a Lincoln Index marker during hawk sightings, to determine the impact of predation on these economically important prey.

R.E. KENWARD

1980-01-01T23:59:59.000Z

195

Modeling and Simulation of Wind Shear and Tower Shadow on Wind Turbines  

Science Journals Connector (OSTI)

Abstract This paper focuses on the modeling and simulation in Matlab/Simulink of the effects of wind shear and tower shadow in a three bladed, variable-speed wind turbine system. The study of the mechanical stress, the mitigation of the torque oscillations and the improvement of the aerodynamic efficiency below rated wind speed, can be attained with a proper modeling of the turbine system. This paper is a contribution on the study of the effects of wind shear and tower shadow, often approximated or neglected, that have to be properly understood, considered and modeled in order to get a better performance of the turbine system.

H. Sintra; V.M.F. Mendes; R. Melcio

2014-01-01T23:59:59.000Z

196

Computer Simulation of Cooling Effect of Wind Tower on Passively Ventilated Building  

E-Print Network [OSTI]

, the placement of the wind tower opening and air inlets into the building should be considered. Finally, the model should include energy storage effects in the thermal mass of the building. Perhaps the best way to incorporate all of these issues into a..., the placement of the wind tower opening and air inlets into the building should be considered. Finally, the model should include energy storage effects in the thermal mass of the building. Perhaps the best way to incorporate all of these issues into a...

Seryak, J.; Kissock, J. K.

2002-01-01T23:59:59.000Z

197

Application of the antenna theory model to a tall tower struck by Behzad Kordi,1,2  

E-Print Network [OSTI]

on the lightning flash parameters. However, the presence of a vertically extended and grounded strike objectApplication of the antenna theory model to a tall tower struck by lightning Behzad Kordi,1] The interaction of lightning with the 553-m high CN Tower in Toronto is modeled using the antenna theory model

Florida, University of

198

Manuscript received for review, February 2008; accepted for publication, SIX CENTURIES OF FIRE HISTORY AT DEVILS TOWER  

E-Print Network [OSTI]

Willson Great Plains CESU, 515 Hardin Hall University of Nebraska­Lincoln 3310 Holdrege, Lincoln, NE 68583­climate relationships derived from Devils Tower, the Black Hills, and other Great Plains sites suggest that Devils Tower and vegetation assessments suggest that conditions are departed from historical conditions. In the Great Plains

Stambaugh, Michael C

199

Control of the flux distribution on a solar tower receiver using an optimized aiming point strategy: Application to THEMIS solar tower  

Science Journals Connector (OSTI)

Abstract Life time of components is one of the technological bottle-necks in the development of solar tower power plant technology. The receiver, which is subjected to high and variable concentrated solar flux density is particularly affected: High, variable and non-homogeneous solar flux on the solar receiver walls results in strong stresses because of high temperatures, thermal shocks and temperature gradient that contribute to the reduction of the life time of this key component. This work aims to present an open loop approach to control the flux density distribution delivered on a flat plate receiver for a solar power tower. Various distributions of aiming points on the aperture of the receiver are considered. The flux density distribution on the aperture is simulated by a computer code. A specific neighborhood is defined for the TABU optimization meta-heuristic according to the size of the image of each individual heliostat. This modified algorithm is implemented to select the best aiming point for each heliostat. This approach has been validated using the example of THEMIS solar power tower in Targasonne, France.

Adrien Salom; Fabien Chhel; Gilles Flamant; Alain Ferrire; Frederik Thiery

2013-01-01T23:59:59.000Z

200

A method to avoid negative damped low frequent tower vibrations for a floating, pitch controlled wind turbine  

Science Journals Connector (OSTI)

Wind turbines mounted on floating platforms is subjected to completely different and soft foundation properties, than seen for onshore wind turbines. This leads to much lower natural frequencies, related to the rigid body motion of the structure which again leads to an unfavorable coupling between tower motion and the pitch control of the turbine. The tower motion in combination with the aerodynamics and the pitch control will be poor or even negative damped which causes large transient loads if not accounted for. The reason for this low damping is shown to be caused by a too fast pitch regulation compared to the motion of the tower or in other words the lowest control-structure natural frequency must be lower than the lowest critical tower frequency. A control algorithm is presented including the tuning method (pole-placement) to ensure the desired control frequency which provides stable tower vibration modes.

T J Larsen; T D Hanson

2007-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "wolc radio tower" 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.


201

Non-thermal radio astronomy  

Science Journals Connector (OSTI)

Abstract This presentation starts with Karl Janskys discovery of cosmic radio emission in 1933 and notes the striking similarities to Hesss discovery of cosmic-rays in 1912. At first it was assumed that this radio emission was thermal but in 1939 Grote Reber discovered that it was stronger at longer wavelengths, requiring a non-thermal emission process. These discoveries had a revolutionary impact on astronomy and radio astronomy was born. The interpretation of this non-thermal radiation as synchrotron emission from high energy particles in the interstellar medium did not occur until the late 1940s but then it provided the link between radio astronomy and cosmic-ray research. Ginzburg, in particular, saw that cosmic-ray astrophysics was now possible using radio waves to trace sources of cosmic-rays. We discuss the discovery of extragalactic active galactic nuclei leading to the discovery of quasars and the first evidence for black holes in the nuclei of galaxies. We summarise the present status and future of some of the main radio telescopes used to image the non-thermal emission from external galaxies. Finally, we include a short description of the use of radio signals for the direct detection of cosmic-rays and UHE neutrinos.

R.D. Ekers

2014-01-01T23:59:59.000Z

202

Gaskell Sun Tower and 2 others Solar Power Plant | Open Energy Information  

Open Energy Info (EERE)

Gaskell Sun Tower and 2 others Solar Power Plant Gaskell Sun Tower and 2 others Solar Power Plant Jump to: navigation, search Name Gaskell Sun Tower and 2 others Solar Power Plant Facility Gaskell Sun Tower and 2 others Sector Solar Facility Type Concentrating Solar Power Facility Status Proposed Developer NRG Energy/eSolar Location Kern County, California Coordinates 35.4937274°, -118.8596804° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":35.4937274,"lon":-118.8596804,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

203

Stress resultants in hyperboloid cooling tower shells subjected to foundation settlement  

SciTech Connect (OSTI)

The effect of differential settlement of columns supporting a natural draught hyperboloid cooling tower on the stress resultants in the tower shell is analyzed using discrete finite element modelling of the shell and the supporting base. The quadrilateral facet shell elements and 3-D beam elements are used to model the shell and the columns respectively. The stress resultants obtained due to an imposed settlement are compared with those reported earlier by other investigators. In the existing literature, the stress resultants are found using the Boussinesq equation to calculate the approximate edge loading (column forces) on the cooling tower shell due to differential settlement. It is shown in the present study that using the Boussinesq solution for the calculation of edge loading may lead to an over-estimation of the column forces and hence the stress resultants. The magnitude of stress resultants is also found to be dependent on the column flexibility. The paper also presents an investigation in which the local amplification of stress resultants in the vicinity of the shell column junction of the cooling towers (stress concentration) due to dead load and foundation settlement is studied. It is shown that the stress concentration can be severe, i.e., up to seven times the average stress resultants for dead load, and up to five times the average stress resultants for the foundation settlement. 28 refs.

Krishna Mohan Rao, S.V.; Appa Rao, T.V.S.R. [CSIR Campus, Madras (India)

1994-08-01T23:59:59.000Z

204

Behavior of Scaled Steel-Concrete Composite Girders and Steel Monopole Towers Strengthened with CFRP  

E-Print Network [OSTI]

Behavior of Scaled Steel-Concrete Composite Girders and Steel Monopole Towers Strengthened with CFRP DAVID SCHNERCH AND SAMI RIZKALLA Cost-effective rehabilitation and/or strengthening of steel. The current research program makes use of new high modulus types of carbon fiber for strengthening steel

205

Top: Rudder Tower is one of 24 Texas A&M buildings undergoing energy efficiency upgrades.  

E-Print Network [OSTI]

Top: Rudder Tower is one of 24 Texas A&M buildings undergoing energy efficiency upgrades. Bottom control energy costs and provide a greener, more energy efficient campus for a more environmentally' building automation system (BAS) will improve energy efficiency and enable better HVAC control in buildings

206

Comparison of linear and nonlinear responses of a compliant tower to random wave forces  

E-Print Network [OSTI]

. Introduction A compliant tower is an offshore structure used in the oil industry as an exploratory, production offshore structure is modeled as a beam undergoing both bending and extension. The beam has a point mass. A quarter of the International Ship and Offshore Structures Congress (ISSC) tension leg platform model

Benaroya, Haym

207

Experimental Study on Energy Efficiency of Heat-source Tower Heat Pump Units in Winter Condition  

Science Journals Connector (OSTI)

Building energy consumption in China has been increasing rapidly. And a small increase in the operation efficiency of the air-conditioning system can substantially decrease it. In this paper a new type heat pump is developed to improve the performance ... Keywords: Heat-source tower, Heat pump, Seasonal energy efficiency ratio(SEER), Hermal properties

Li Nianping; Zhang Wenjie; Wang Lijie; Liu Qiuke; Hu Jinhua

2011-01-01T23:59:59.000Z

208

Blandford MTA Tower Wind Monitoring This document provides information not repeated in the monthly wind monitoring  

E-Print Network [OSTI]

on a regular basis. The logger samples wind speed and direction once every two seconds. These are then combined applicable): wind speed, wind speed standard deviation, wind direction, temperature, and solar insolation. F1 ranges applied for high and low wind speeds. A wind direction standard Blandford MTA Tower Wind

Massachusetts at Amherst, University of

209

Marion Meteorological Tower Wind Monitoring This document provides information not repeated in the monthly wind monitoring  

E-Print Network [OSTI]

. The logger samples wind speed and direction once every two seconds. These are then combined into 10-minute): wind speed, wind speed standard deviation, wind direction, temperature, and solar insolation. F1 > TF1 applied for high and low wind speeds. A wind direction standard Marion Met Tower Wind Monitoring #12

Massachusetts at Amherst, University of

210

Spectrum Sensing and Reconstruction for Cognitive Radio  

E-Print Network [OSTI]

Spectrum Sensing and Reconstruction for Cognitive Radio Amanpreet S Saini, Zhen Hu, Robert Qiu with spectrum sensing and spectrum reconstruction under the umbrella of cognitive radio which is the smart radio to explore and exploit the free spectrum. Spectrum analyzer is used to emulate cognitive radio to do spectrum

Qiu, Robert Caiming

211

Cognitive Radio Technology [from THE GUEST EDITORS  

E-Print Network [OSTI]

Cognitive Radio Technology [from THE GUEST EDITORS] Maria Gabriella di Benedetto, Yingbo Hua of cognitive radio. Perhaps the most pressing of them is improved utilization of the electromagnetic radio addressing a multitude of cognitive radio topics were recently approved with a total budget of more than 50

Di Benedetto, Maria-Gabriella

212

Radio galaxies and local quasars  

Science Journals Connector (OSTI)

... through the gas and magnetic fields near the galaxy which ejected them. This would produce synchroton radio emission in great strength and over a long time, drawing its power from ...

JAMES TERRELL

1975-11-13T23:59:59.000Z

213

Microwave and Radio Frequency Workshop  

Broader source: Energy.gov [DOE]

At the Microwave and Radio Frequency Workshop (held in Long Beach, CA, on July 25, 2012), academic and industry experts discussed the existing and emerging electrotechnologies such as microwave ...

214

Effect of internal stiffening rings and wall thickness on the structural response of steel wind turbine towers  

Science Journals Connector (OSTI)

Abstract In this paper, the structural response of steel tubular wind turbine towers with various design configurations is analysed using FEM modelling. Towers of various heights between 50 and 250m are considered and investigated with three different design options as follows: (i) thick walled tower with internal horizontal stiffening rings, (ii) thick walled tower without stiffening rings and (iii) thin walled tower with stiffening rings. Based on this analysis, weight reduction ratios are examined in relation to the horizontal sway and von Mises stress increase ratios in order to identify a more efficient design approach between reducing the wall thickness and adopting internal stiffeners. All studied design solutions satisfy the strength and serviceability requirements as specified by the design codes of practice. In the final part of paper, the dynamic characteristics of these three types of towers have been examined to obtain the natural frequencies and mode shapes. The studied model ignored the mass of nacelle-rotor system and the wind turbines, namely, only the isolated tower was included. Furthermore, the recommendations to avoid resonance for each height case are proposed.

Y. Hu; C. Baniotopoulos; J. Yang

2014-01-01T23:59:59.000Z

215

Effects of adding wash tower effluent to Ano Liossia landfill to enhance bioreaction c by Olympia Galenianou.  

E-Print Network [OSTI]

A theoretical study was performed on the effects of adding sulfate-rich wash tower effluent from the Athens hospital waste incinerator to the Ano Liossia landfill of Athens. The method of mass balance was used to examine ...

Galenianou, Olympia

2006-01-01T23:59:59.000Z

216

Energy Savings Accomplished by Replacing Steam Ejectors with Electric Driven Vacuum Pumps in Crude Distillation Vacuum Towers  

E-Print Network [OSTI]

The low cost of steam combined with the maintenance free operation of steam ejectors has assured their unquestioned use in providing the necessary vacuum for crude distillation vacuum towers. However, the cost of steam production has risen...

Nelson, R. E.

1982-01-01T23:59:59.000Z

217

The Solar Power Tower Jlich A Solar Thermal Power Plant for Test and Demonstration of Air Receiver Technology  

Science Journals Connector (OSTI)

The open volumetric receiver technology allows the use of air as heat transfer medium at high temperatures in solar thermal power tower plants. It combines porous ceramic ... a strictly modular receiver design. H...

K. Hennecke; P. Schwarzbzl; G. Koll

2009-01-01T23:59:59.000Z

218

Current and future costs for parabolic trough and power tower systems in the US market.  

SciTech Connect (OSTI)

NREL's Solar Advisor Model (SAM) is employed to estimate the current and future costs for parabolic trough and molten salt power towers in the US market. Future troughs are assumed to achieve higher field temperatures via the successful deployment of low melting-point, molten-salt heat transfer fluids by 2015-2020. Similarly, it is assumed that molten salt power towers are successfully deployed at 100MW scale over the same time period, increasing to 200MW by 2025. The levelized cost of electricity for both technologies is predicted to drop below 11 cents/kWh (assuming a 10% investment tax credit and other financial inputs outlined in the paper), making the technologies competitive in the marketplace as benchmarked by the California MPR. Both technologies can be deployed with large amounts of thermal energy storage, yielding capacity factors as high as 65% while maintaining an optimum LCOE.

Turchi, Craig (National Renewable Energy Laboratory, Golden, CO); Kolb, Gregory J.; Mehos, Mark Steven (National Renewable Energy Laboratory, Golden, CO); Ho, Clifford Kuofei

2010-08-01T23:59:59.000Z

219

Stability and Turbulence in the Atmospheric Boundary Layer: A Comparison of Remote Sensing and Tower Observations  

SciTech Connect (OSTI)

When monitoring winds and atmospheric stability for wind energy applications, remote sensing instruments present some advantages to in-situ instrumentation such as larger vertical extent, in some cases easy installation and maintenance, measurements of vertical humidity profiles throughout the boundary layer, and no restrictions on prevailing wind directions. In this study, we compare remote sensing devices, Windcube lidar and microwave radiometer, to meteorological in-situ tower measurements to demonstrate the accuracy of these measurements and to assess the utility of the remote sensing instruments in overcoming tower limitations. We compare temperature and wind observations, as well as calculations of Brunt-Vaisala frequency and Richardson numbers for the instrument deployment period in May-June 2011 at the U.S. Department of Energy National Renewable Energy Laboratory's National Wind Technology Center near Boulder, Colorado. The study reveals that a lidar and radiometer measure wind and temperature with the same accuracy as tower instruments, while also providing advantages for monitoring stability and turbulence. We demonstrate that the atmospheric stability is determined more accurately when the liquid-water mixing ratio derived from the vertical humidity profile is considered under moist-adiabatic conditions.

Friedrich, K.; Lundquist, J. K.; Aitken, M.; Kalina, E. A.; Marshall, R. F.

2012-01-01T23:59:59.000Z

220

NREL National Wind Technology Center (NWTC): M2 Tower; Boulder, Colorado (Data)  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

The National Wind Technology Center (NWTC), located at the foot of the Rocky Mountains near Boulder, Colorado, is a world-class research facility managed by NREL for the U.S. Department of Energy. NWTC researchers work with members of the wind energy industry to advance wind power technologies that lower the cost of wind energy through research and development of state-of-the-art wind turbine designs. NREL's Measurement and Instrument Data Center provides data from NWTC's M2 tower which are derived from instruments mounted on or near an 82 meter (270 foot) meteorological tower located at the western edge of the NWTC site and about 11 km (7 miles) west of Broomfield, and approximately 8 km (5 miles) south of Boulder, Colorado. The data represent the mean value of readings taken every two seconds and averaged over one minute. The wind speed and direction are measured at six heights on the tower and air temperature is measured at three heights. The dew point temperature, relative humidity, barometric pressure, totalized liquid precipitation, and global solar radiation are also available.

Jager, D.; Andreas, A.

Note: This page contains sample records for the topic "wolc radio tower" 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

A Coordinated Radio Afterglow Program  

E-Print Network [OSTI]

We describe a ground-based effort to find and study afterglows at centimeter and millimeter wavelengths. We have observed all well-localized gamma-ray bursts in the Northern and Southern sky since BeppoSAX first started providing rapid positions in early 1997. Of the 23 GRBs for which X-ray afterglows have been detected, 10 have optical afterglows and 9 have radio afterglows. A growing number of GRBs have both X-ray and radio afterglows but lack a corresponding optical afterglow.

D. A. Frail; S. R. Kulkarni; M. H. Wieringa; G. B. Taylor; G. H. Moriarty-Schieven; D. S. Shepherd; R. M. Wark; R. Subrahmanyan; D. McConnell; S. J. Cunningham

1999-12-08T23:59:59.000Z

222

Towards Cognitive Radio Networks: Spectrum Utilization Measurements in Suburb Environment  

E-Print Network [OSTI]

Towards Cognitive Radio Networks: Spectrum Utilization Measurements in Suburb Environment Václav in an opportunistic way. Cognitive radio concept for better spectrum utilization is introduced here along -- Cognitive radio, radio spectrum management, spectrum sensing, spectrum utilization. I. INTRODUCTION

Paris-Sud XI, Université de

223

Spectrum Characterization for Opportunistic Cognitive Radio Systems  

E-Print Network [OSTI]

1 Spectrum Characterization for Opportunistic Cognitive Radio Systems Tevfik Y¨ucek and H challenging problems in cognitive radio systems. The spectrum of interest needs to be characterized and unused initial network entry is also discussed as a case study. Index Terms-- Cognitive radio, spectrum sensing

Arslan, Hüseyin

224

System Design for Cognitive Radio Communications  

E-Print Network [OSTI]

about an increasing demand for frequency spectrum. Cognitive radio offers a tempting solution, in which frequency bands that are not being used by their licensed users are utilized by cognitive radios. Since cognitive radios do not need to have a license and since they do not affect the operation

Arslan, Hüseyin

225

METHODS OF RADIO-FREQUENCY CURRENT DRIVE  

E-Print Network [OSTI]

METHODS OF RADIO-FREQUENCY CURRENT DRIVE N. J. FISCH* Princeton Plasma Physics Laboratory-670 Radio-frequency waves can penetrate thermonuclear plasmas, depositing momentum and energy with great. INTRODUCTION Using radio-frequency (rf) waves to drive the toroidal current in tokamak reactors is attractive

226

The environments of FRII radio sources  

Science Journals Connector (OSTI)

......radio-emitting plasma, as argued by Kaiser...used total 178-MHz flux densities from...about the external atmosphere. 1 As discussed...radio-emitting plasma altogether from...X-ray-emitting atmospheres. Although many...radio-emitting plasma. It is then a coincidence......

M. J. Hardcastle; D. M. Worrall

2000-12-01T23:59:59.000Z

227

Intelligent Radio Frequency (RF) Monitoring  

E-Print Network [OSTI]

? Intelligent Radio Frequency (RF) Monitoring ? 2009 Armstrong International, Inc. www.armstronginternational.com 2 ?Expect many enjoyable experiences!? David M. Armstrong Present Process Challenges ? Identifying a failure ? Procedure.... Armstrong Steam Trap Challenges ? Identifying a failure ? Manpower ? Location ? Magnitude of failure ? Energy loss ? Loss of heat transfer ? Justification for repair ? ?Speed of Implementation? ? Environmental concerns Manpower Location 4...

Kimbrough, B.

228

Hybrid spread spectrum radio system  

DOE Patents [OSTI]

Systems and methods are described for hybrid spread spectrum radio systems. A method, includes receiving a hybrid spread spectrum signal including: fast frequency hopping demodulating and direct sequence demodulating a direct sequence spread spectrum signal, wherein multiple frequency hops occur within a single data-bit time and each bit is represented by chip transmissions at multiple frequencies.

Smith, Stephen F. (London, TN) [London, TN; Dress, William B. (Camas, WA) [Camas, WA

2010-02-09T23:59:59.000Z

229

Optimizing Cooling Tower Performance- Refrigeration Systems, Chemical Plants, and Power Plants all Have A Resource Quietly Awaiting Exploitation-Cold Water!!  

E-Print Network [OSTI]

OPTIMIZING COOLING TOWER PERFORMANCE REFRIGERATION SYSTEMS, CHEMICAL PLANTS, AND POWER PLANTS ALL HAVE A RESOURCE QUIETLY AWAITING EXPLOITATION - COLD WATER!! ROBERT BURGER President Burger and Associates, Inc. Dallas, Texas Cooling... towers, because of their seeming simplicity, are usually orphans of the facilities operation. We are all aware that cooling towers are the step-children of the chemical process plant, electric power generating station, and refrigeration system...

Burger, R.

230

Low Wind Speed Technology Phase I: Evaluation of Design and Construction Approaches for Economical Hybrid Steel/Concrete Wind Turbine Towers; BERGER/ABAM Engineers Inc.  

SciTech Connect (OSTI)

This fact sheet describes a subcontract with BERGER/ABAM Engineers Inc. to study the economic feasibility of concrete and hybrid concrete/steel wind turbine towers.

Not Available

2006-03-01T23:59:59.000Z

231

A Single Tower Configuration of the Modular Gamma Box Counter System - 13392  

SciTech Connect (OSTI)

Canberra's Standard Gamma Box Counter System is designed to perform accurate quantitative assays of gamma emitting nuclides for a wide range of large containers including B-25 crates and ISO shipping containers. Using a modular building-block approach, the system offers tremendous flexibility for a variety of measurement situations with wide ranges of sample activities and throughput requirements, as well as the opportunity to modify the configuration for other applications at a later date. The typical configuration consists of two opposing towers each equipped with two high purity germanium detectors, and an automated container trolley. This paper presents a modified configuration, consisting of a single tower placed inside a measurement trailer with three detector assemblies, allowing for additional vertical segmentation as well as a viewing a container outside the trailer through the trailer wall. An automatic liquid nitrogen fill system is supplied for each of the detectors. The use of a forklift to move the container for horizontal segmentation is accommodated by creating an additional operational and calibration set-up in the NDA 2000 software to allow for the operator to rotate the container and assay the opposite side, achieving the same sensitivity as a comparable two-tower system. This Segmented Gamma Box Counter System retains the core technologies and design features of the standard configuration. The detector assemblies are shielded to minimize interference from environmental and plant background, and are collimated to provide segmentation of the container. The assembly positions can also be modified in height and distance from the container. The ISOCS calibration software provides for a flexible approach to providing the calibrations for a variety of measurement geometries. The NDA 2000 software provides seamless operation with the current configuration, handling the data acquisition and analysis. In this paper, an overview of this system is discussed, along with the measured performance results, calibration methodology and verification, and minimum detectable activity levels. (authors)

Morris, K.; Nakazawa, D.; Francalangia, J.; Gonzalez, H. [Canberra Industries Inc., 800 Research Parkway, Meriden, CT, 06450 (United States)] [Canberra Industries Inc., 800 Research Parkway, Meriden, CT, 06450 (United States)

2013-07-01T23:59:59.000Z

232

Utility-scale Power Tower Solar Systems: Performance Acceptance Test Guidelines  

Science Journals Connector (OSTI)

Abstract Prior to commercial operation, large solar systems in utility-size power plants need to pass performance acceptance tests conducted by the engineering, procurement, and construction (EPC) contractor or owners. In lieu of the present absence of ASME or other international test codes developed for this purpose, the NREL undertook the development of interim Guidelines to provide recommendations for test procedures that can yield results of a high level of accuracy consistent with good engineering knowledge and practice. The Guidelines contained here follow the general approach of the earlier NREL report on parabolic trough collector fields, but in this case are specifically written for power tower solar systems composed of a heliostat (reflector) field directing the sun's rays to a receiver (heat exchanger) on a high central tower. The working fluid in the tower receiver can be molten salt, water/steam, air, CO2, or other suitable fluids, each with its own particular attributes. The fundamental differences between acceptance of a solar power plant and a conventional fossil-fired plant are the inherently transient nature of the energy source and the necessity to use a performance projection model in the acceptance process. Two primary types of test runs are to be conducted. The first the Short-Duration Steady-State Thermal Power Test (Power Test) measures the thermal power output of the solar system under clear-sky conditions over a short period, during which thermal equilibrium and stable steady-state conditions exist, and compares the measured results to performance model projections for those conditions. The second test type the Long-Duration Production (or Reliability) Test (Production Test) is a continuous multi-day energy test that gathers multiple detailed daily thermal energy outputs and compares the results to projections from a performance model. Both clear-sky and partly cloudy conditions are acceptable. Additionally, the functionality of the solar system should be observed with regard to such items as daily startup, normal operation, standby and shutdown.

D. Kearney

2014-01-01T23:59:59.000Z

233

Recent AGN Observations by the Solar Tower Atmospheric Cherenkov Effect Experiment  

Science Journals Connector (OSTI)

The Solar Tower Atmospheric Cherenkov Effect Experiment (STACEE) is a ground?based atmospheric Cherenkov telescope for the detection of very high energy gamma rays from Galactic and extra?galactic sources. By utilizing the large collection area provided by the solar mirrors of the National Solar Thermal Test Facility in Albuquerque New Mexico STACEE achieves a low energy threshold around 100 GeV for the detection of gamma rays. We briefly describe the STACEE detector and detail recent observations of Active Galactic Nuclei.

J. Kildea; A. Alabiso; D. A. Bramel; J. Carson; C. E. Covault; D. Driscoll; P. Fortin; D. M. Gingrich; D. S. Hanna; A. Jarvis; T. Lindner; R. Mukherjee; C. Mueller; R. A. Ong; R. A. Scalzo; D. A. Williams; J. Zweerink

2005-01-01T23:59:59.000Z

234

A review of "Control of Religious Printing in Early Stuart England." by S. Mutchow Towers  

E-Print Network [OSTI]

attempts to break out of the rigid framework that Dutch iconography imposes. Therefore, the purpose of this book has not entirely become clear. One reason why the book?s purpose remains partly obscure lies in the author?s heavy dependence on texts... tradition of love imagery that the book precisely does not address. S. Mutchow Towers. Control of Religious Printing in Early Stuart England. Woodbridge, U.K.: The Boydell Press, 2003. viii + 296 pp. $75.00. Review by STEVEN MATTHEWS, THE UNIVERSITY...

Steven Matthews

2004-01-01T23:59:59.000Z

235

Microsoft Word - CX-Pearl-Marion-Tower-6-2-Replace_FY12_WEB.doc  

Broader source: Energy.gov (indexed) [DOE]

3, 2012 3, 2012 REPLY TO ATTN OF: KEPR-4 SUBJECT: Environmental Clearance Memorandum Richard Heredia Project Manager - TEP-TPP-1 Proposed Action: Pearl-Marion No.1 Tower 6/2 replacement project PP&A Project No.: PP&A 2147, WO# 00296634, Task 3 Categorical Exclusion Applied (from Subpart D, 10 C.F.R. Part 1021): B4.6 Additions and modifications to transmission facilities Location: Canby, Clackamas County, Oregon Township 3 South, Range 1 East, Section 19 Proposed by: Bonneville Power Administration (BPA) Description of the Proposed Action: BPA proposes to replace a single tower (6/2) on the existing Pearl-Marion No. 1 500-kilovolt (kV) transmission line. Tower 6/2 is located along the Molalla River where natural river channel movement and continued stream bank erosion

236

An evaluation of possible next-generation high temperature molten-salt power towers.  

SciTech Connect (OSTI)

Since completion of the Solar Two molten-salt power tower demonstration in 1999, the solar industry has been developing initial commercial-scale projects that are 3 to 14 times larger. Like Solar Two, these initial plants will power subcritical steam-Rankine cycles using molten salt with a temperature of 565 C. The main question explored in this study is whether there is significant economic benefit to develop future molten-salt plants that operate at a higher receiver outlet temperature. Higher temperatures would allow the use of supercritical steam cycles that achieve an improved efficiency relative to today's subcritical cycle ({approx}50% versus {approx}42%). The levelized cost of electricity (LCOE) of a 565 C subcritical baseline plant was compared with possible future-generation plants that operate at 600 or 650 C. The analysis suggests that {approx}8% reduction in LCOE can be expected by raising salt temperature to 650 C. However, most of that benefit can be achieved by raising the temperature to only 600 C. Several other important insights regarding possible next-generation power towers were also drawn: (1) the evaluation of receiver-tube materials that are capable of higher fluxes and temperatures, (2) suggested plant reliability improvements based on a detailed evaluation of the Solar Two experience, and (3) a thorough evaluation of analysis uncertainties.

Kolb, Gregory J.

2011-12-01T23:59:59.000Z

237

Deposition and corrosion phenomena on aluminum surfaces under deluged dry cooling-tower condisions. Interim report  

SciTech Connect (OSTI)

Deposition and corrosion on aluminum heat exchanger surfaces resulting from deluge in wet/dry cooling towers is simulated in a laboratory Corrosion/Deposition Loop (CDL). Heat exchanger deposition buildup was found to be linearly dependent on concentration factor and number of wet/dry cycles. Deionized water rising after deluge reduced rate of deposition. Laboratory data obtained from CDL relates directly to operation of the Advanced Concepts Test (ACT) demonstration cooling tower. Technology transferable to ACT shows that deposition from supersaturated solution can be effectively controlled by attention to water chemistry, pH, water conditioning, and good heat transfer design. The additional mechanism of deposition by water film evaporation is effectively managed by soft water rinsing and uniform surface wetting. Exposure of a model TRANE surface (the ACT wet/dry exchanger) produced short-term deposition extrapolating to 0.011 mm buildup in three years. Studies continue to verify 4X as maximum cycles of concentration through control of water chemistry and rinsing after deluge. Deluge water used at ACT facility is sufficiently aggressive to warrant use of Alclad to extend tube service life.

Wheeler, K.R.; May, R.P.; Douglas, J.G.; Tylczak, J.H.

1981-07-01T23:59:59.000Z

238

Comparison of an impedance heating system to mineral insulated heat trace for power tower applications  

SciTech Connect (OSTI)

A non-conventional type of heating system is being tested at Sandia National Laboratories for solar thermal power tower applications. In this system, called impedance heating, electric current flows directly through the pipe to maintain the desired temperature. The pipe becomes the resistor where the heat is generated. Impedance heating has many advantages over previously used mineral insulated (MI) heat trace. An impedance heating system should be much more reliable than heat trace cable since delicate junctions and cabling are not used and the main component, a transformer, is inherently reliable. A big advantage of impedance heating is the system can be sized to rapidly heat up the piping to provide rapid response times necessary in cyclic power plants such as solar power towers. In this paper, experimental results from testing an impedance heating system are compared to MI heat trace. The authors found impedance heating was able to heat piping rapidly and effectively. There were not significant stray currents and impedance heating did not affect instrumentation.

Pacheco, J.E.; Kolb, W.J.

1997-03-01T23:59:59.000Z

239

Comparison of Triton SODAR Data to Meteorological Tower Wind Measurement Data in Hebei Province, China  

SciTech Connect (OSTI)

With the increased interest in remote sensing of wind information in recent years, it is important to determine the reliability and accuracy of new wind measurement technologies if they are to replace or supplement conventional tower-based measurements. In view of this, HydroChina Corporation and the United States National Renewable Energy Laboratory (NREL) conducted a comparative test near a wind farm in Hebei Province, China. We present the results of an analysis characterizing the measurement performance of a state-of-the-art Sound Detection and Ranging (sodar) device when compared to a traditional tower measurement program. NREL performed the initial analysis of a three-month period and sent the results to HydroChina. When another month of data became available, HydroChina and their consultant Beijing Millenium Engineering Software (MLN) repeated NREL's analysis on the complete data set, also adding sensitivity analysis for temperature, humidity, and wind speed (Section 6). This report presents the results of HydroChina's final analysis of the four-month period.

Yuechun, Y.; Jixue, W.; Hongfang, W.; Guimin, L.; Bolin, Y.; Scott, G.; Elliott, D.; Kline, D.

2012-01-01T23:59:59.000Z

240

Radio frequency overview of the high explosive radio telemetry project  

SciTech Connect (OSTI)

High explosive radio telemetry (HERT) is a project that is being developed jointly by Los Alamos National Laboratory and AlliedSignal Federal Manufacturing and Technologies. The ultimate goal is to develop a small, modular telemetry system capable of high-speed detection of explosive events, with an accuracy on the order of 10 nanoseconds. The reliable telemetry of this data, from a high-speed missile trajectory, is a very challenging opportunity. All captured data must be transmitted in less than 20 microseconds of time duration. This requires a high bits/Hertz microwave telemetry modulation code to insure transmission of the data with the limited time interval available.

Bracht, R. [Los Alamos National Lab., NM (United States); Dimsdle, J.; Rich, D.; Smith, F. [AlliedSignal Federal Manufacturing and Technologies, Kansas City, MO (United States)

1998-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "wolc radio tower" 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

The radio spectrum of Sgr A*  

E-Print Network [OSTI]

We discuss the radio spectrum of Sgr A* \\index{Sgr A*, radio spectrum} in the frequency range between $\\approx 1\\,{\\rm GHz}$ and $\\approx 1\\,000\\,{\\rm GHz}$, show that it can be explained by optically thin synchrotron radiation \\index{Sgr A*, synchrotron radiation, optically thin} of relativistic electrons, and point toward a possible correlation between the spectrum of Sgr A* and larger-scale ($\\la 50\\,{\\rm pc}$) radio emission from the Galactic Center \\index{Galactic Center} region.

Wolfgang J. Duschl; Harald Lesch

1994-11-03T23:59:59.000Z

242

Cognitive Radio and Smart Grid Dr. Robert C. Qiu  

E-Print Network [OSTI]

Cognitive Radio and Smart Grid Dr. Robert C. Qiu Professor Wireless Networking Systems Laboratory Presented at IEEE Chapter, Huntsville, AL Email: rqiu@tntech.edu http://iweb.tntech.edu/rqiu #12;Cognitive RadioCognitive Radio 2 2/23/2010 #12;Outline Cognitive Radio Cognitive Radio @ Tennessee Tech

Qiu, Robert Caiming

243

Spectrum Decision for Cognitive Radio Networks.  

E-Print Network [OSTI]

??Cognitive Radio Networks (CRNs) are a key technology suggested to be part of 4G and beyond. The fundamental concept is to let Secondary Users (SUs) (more)

Yao, Yong; Erman, David

2011-01-01T23:59:59.000Z

244

Compressive Spectrum Sensing for Cognitive Radio Networks.  

E-Print Network [OSTI]

??Spectrum sensing is the most important part in cognitive radios. Wideband spectrum sensing requires high speed and large data samples. It makes sampling process challenging (more)

Nakarmi, Ukash

2011-01-01T23:59:59.000Z

245

Agile Testing Methods for IC Radios.  

E-Print Network [OSTI]

??This thesis concentrates on the development of a new testing procedure for the radio used in Broadcom?s WLAN and cellular chips. Verification and hardware testing (more)

Martinez, Luis

2011-01-01T23:59:59.000Z

246

Hybrid spread spectrum radio system  

DOE Patents [OSTI]

Systems and methods are described for hybrid spread spectrum radio systems. A method includes modulating a signal by utilizing a subset of bits from a pseudo-random code generator to control an amplification circuit that provides a gain to the signal. Another method includes: modulating a signal by utilizing a subset of bits from a pseudo-random code generator to control a fast hopping frequency synthesizer; and fast frequency hopping the signal with the fast hopping frequency synthesizer, wherein multiple frequency hops occur within a single data-bit time.

Smith, Stephen F. (London, TN); Dress, William B. (Camas, WA)

2010-02-02T23:59:59.000Z

247

Centralized Collaborative Compressed Sensing of Wideband Spectrum for Cognitive Radios  

E-Print Network [OSTI]

1 Centralized Collaborative Compressed Sensing of Wideband Spectrum for Cognitive Radios Hessam, spectrum sensing, cognitive radio, distri- bution discontinuities, algebraic detection, wideband. I technique for cognitive radio systems which combines algebraic tools and compressive sampling techniques

Paris-Sud XI, Université de

248

Spectrum Auction Framework for Access Allocation in Cognitive Radio Networks  

E-Print Network [OSTI]

1 Spectrum Auction Framework for Access Allocation in Cognitive Radio Networks Gaurav S. Kasbekar does not exist. Index Terms Cognitive Radio Networks, Spectrum Auctions, Algorithms I. INTRODUCTION, Wireless Meteropolitan Area networks etc., demand for radio spectrum is increasing. Currently, spectrum

Sarkar, Saswati

249

Optimal Classifier Based Spectrum Sensing in Cognitive Radio Wireless Systems  

E-Print Network [OSTI]

Optimal Classifier Based Spectrum Sensing in Cognitive Radio Wireless Systems Siddharth Sharma tolerance. General Terms Algorithms, Theory, Reliability. Keywords Cognitive Radio; Cooperative Spectrum Cognitive radio (CR) networks have been proposed as a revolutionary breakthrough to enhance spectrum

Jagannatham, Aditya K.

250

Ngociation de spectre dans les rseaux de radio cognitive  

E-Print Network [OSTI]

1 Négociation de spectre dans les réseaux de radio cognitive Rapport de recherche - Juin 2013 ................................................................................................................................... 4 I. Chapitre I : Réseaux de radio cognitive)............................................................................................... 6 I.3 Radio cognitive

Paris-Sud XI, Université de

251

Cognitive Radio Network {swjang, sbahk}@netlab.snu.ac.kr  

E-Print Network [OSTI]

2010 Cognitive Radio Network , , {swjang, sbahk}@netlab.snu.ac.kr Analysis of Average Opportunities in Cognitive Radio Networks Seowoo Jang, Saewoong Bahk INMC, EECS, Seoul National University Cognitive Radio Network . Primary user

Bahk, Saewoong

252

Department of Mechanical Engineering Spring 2010 Kenya Water Well Drill Rig Redesign of Engine Drive Train System & Support Tower  

E-Print Network [OSTI]

of Engine Drive Train System & Support Tower Overview The team was presented with the task of redesigning the engine drive train system and support structure for a water drill rig to be used in Kenya. The original engine drive train system was fabricated by a professional machinist and had many intricate components

Demirel, Melik C.

253

Long-Term Carbon Dioxide Fluxes from a Very Tall Tower in a Northern Forest: Flux Measurement Methodology  

Science Journals Connector (OSTI)

Methodology for determining fluxes of CO2 and H2O vapor with the eddy-covariance method using data from instruments on a 447-m tower in the forest of northern Wisconsin is addressed. The primary goal of this study is the validation of the methods ...

Bradford W. Berger; Kenneth J. Davis; Chuixiang Yi; Peter S. Bakwin; Cong Long Zhao

2001-04-01T23:59:59.000Z

254

A multi-site analysis of random error2 in tower-based measurements of carbon and energy fluxes3  

E-Print Network [OSTI]

1 A multi-site analysis of random error2 in tower-based measurements of carbon and energy fluxes3 4 MEASUREMENTS Richardson et al. 1 January 13, 2006 Abstract1 Measured surface-atmosphere fluxes of energy open-path, gas analyzer is22 used.23 #12;RANDOM ERRORS IN ENERGY AND CO2 FLUX MEASUREMENTS Richardson

255

Evidence of a Threshold Wind Speed in Tower-mounted Scatterometer Data David W. Draper and David G. Long  

E-Print Network [OSTI]

Evidence of a Threshold Wind Speed in Tower-mounted Scatterometer Data David W. Draper and David G ) in scatterom- eter measurements over water is theorized to go to zero below a threshold wind speed due. Evidence of the threshold wind speed and a hysteresis effect have been observed in airship and wave tank

Long, David G.

256

tall tower facility and instrumentation New coNstraiNts oN the Nitrous oxide budget of agricultural ecosystems  

E-Print Network [OSTI]

thick. The FAO classification is Chernozem. The field site has been under cultivation for the past 125. The tall tower source footprint is dominated by agricultural land use. The domi- nant crop types include measured at 100 m using a three dimensional sonic anemometer- thermometer for computation of energy, water

Minnesota, University of

257

Telecommunications Emergency Alert System (EAS) Radio  

E-Print Network [OSTI]

Telecommunications Emergency Alert System (EAS) Radio 1. Send completed form to Mail Stop will be charged for a replacement. If the radio malfunctions, please contact Telecommunications. Texas A Departmental Approval Signature Date Service Date Desired Telecommunications Office Use Only Service Due Date

258

Spectrum Sensing Techniques in Cognitive Radio Communications  

E-Print Network [OSTI]

1 Spectrum Sensing Techniques in Cognitive Radio Communications Mario Bkassiny*, Yang Li, Georges for CR's. Index Terms-- Cognitive radio, cooperative spectrum sensing, dynamic spectrum access, energy, jayaweera, christos}@ece.unm.edu Abstract-- In this paper, we review some of the recent patents on spectrum

Jayaweera, Sudharman K.

259

Broadband Wireless Cognitive Radio-I  

E-Print Network [OSTI]

spectrum usage! #12;CMPE 591 - Broadband Wireless Networks 6 Cognitive Radio "Cognitive Radio" is the key portions of the spectrum is available and detect the presence of licensed users when a user operates in a licensed band. (Spectrum Sensing) 2. Select the best available channel. (Spectrum Decision) 3. Coordinate

Tuðcu, Tuna

260

Commercial Mobile Radio Service (WRI CMRS)  

E-Print Network [OSTI]

Commercial Mobile Radio Service (WRI ­ CMRS) Commercial Motor Vehicle Roadside Technology Corridor · Improved safety of CMVs and their operation · Reductions in accidents · Increased productivity and mobility · CMRS ­ Commercial Mobile Radio Services · Includes telematics devices (such as electronic on

Note: This page contains sample records for the topic "wolc radio tower" 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

NATIONAL RADIO ASTRONOMY OBSERVATORY CHARLOTTESVILLE, VIRGINIA  

E-Print Network [OSTI]

No. 186 A PROGRESS REPORT ON JOSEPHSON JUNCTION MIXERS FOR MILLIMETER WAVE RADIO ASTRONOMY D. R. DECKER FEBRUARY 1978 NUMBER OF COPIES: 150 #12;A PROGRESS REPORT ON JOSEPHSON JUNCTION MIXERS FOR MILLIMETER WAVE RADIO ASTRONOMY D. R. Decker ABSTRACT Interest in use of Josephson junction devices

Groppi, Christopher

262

Raw Data from National Wind Technology Center M2 Tower (1996 - 2001) |  

Open Energy Info (EERE)

1996 - 2001) 1996 - 2001) Dataset Summary Description This raw data reflects readings from instruments mounted on or near a 82 meter meteorological tower located at the National Wind Technology Center (NWTC), approximately 5 miles south of Boulder, CO (specifically: 39.9107 N, 105.2348 W, datum WGS84). The base elevation at the site is 1,855 meters AMSL.The dataset includes irrandiance information (Global, kWs/m2) and meteorological data, such as temperature, pressure, and dew point, as well as wind speed and direction at 2m, 5m, 10m, 20m, 50m, and 80m. Included here is a portion of the available data: from September 23, 1996 - August 23, 2001. A separate dataset is available for Aug 24, 2001 - March 10, 2011 in OpenEI. The NWTC website provides current data (updated daily), from as early as August 24, 2001, as well as instrument specifications.

263

DOE/SC-ARM/TR-128 Tower Water-Vapor Mixing Ratio Value-Added  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

8 8 Tower Water-Vapor Mixing Ratio Value-Added Product April 2013 DISCLAIMER This report was prepared as an account of work sponsored by the U.S. Government. Neither the United States nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favoring by the U.S. Government or any agency thereof. The views and

264

Raw Data from National Wind Technology Center M2 Tower (2001 - 2011) |  

Open Energy Info (EERE)

2001 - 2011) 2001 - 2011) Dataset Summary Description This raw data reflects readings from instruments mounted on or near a 82 meter meteorological tower located at the National Wind Technology Center (NWTC), approximately 5 miles south of Boulder, CO (specifically: 39.9107 N, 105.2348 W, datum WGS84). The base elevation at the site is 1,855 meters AMSL.The dataset includes irrandiance information, such as global PSP (W/m2) and meteorological data, such as temperature, pressure, and wind speed and direction (at 2m, 5m, 10m, 20m, 50m, and 80m). Included here is a portion of the available data: from August 24, 2001 - March 10, 2011. A separate dataset is available for the period between September 23, 1996 and August 23, 2001.The NWTC website provides up to the day updates to this data, from as early as August 24, 2001 through yesterday, as well as instrument specifications.

265

Energy Tower combined with pumped storage and desalination: Optimal design and analysis  

Science Journals Connector (OSTI)

The Energy Tower (ET) is a power plant project which uses hot dry air and seawater to produce electricity. An optimized design of a system that is a combination of an ET, pumped storage and seawater desalination plant is considered. A model set covering each subsystem, and results of the optimized design for a project in the area of Eilat are presented. The additional benefit from combining the systems comes from an efficient use of the energy in the brine water coming from the desalination process, and from using pumped storage in an unconventional way. The benefits of the combined system lead to an increase of 14% in the annual net profit, compared to the sum of profits from optimally designed stand-alone systems.

E. Omer; R. Guetta; I. Ioslovich; P.O. Gutman; M. Borshchevsky

2008-01-01T23:59:59.000Z

266

Fuzzy Logic Application for Optimization of the Cooling Towers Control System  

E-Print Network [OSTI]

The control system for the SPS-BA6 cooling towers station is considered in order to introduce the concept of a multivariable process. Multivariable control means the maintenace of several controlled variables at independent set points. In a single-variable system, to keep the single process variables within their critical values is considered a rather simple operation. In a complex multivariable system, the determination of the optimal operation point results in a combination of all set values of the variables. Control of a multivariable system requires therefore a more complex analysis. As the solution based on a mathematical model of the process is far beyond acceptable complexity, most mathematical models involve extensive simplifications and linearizations to optimize the resulting controllers. In this report the author will demonstrate how fuzzy logic might provide elegant and efficient solutions in the design of multivariable control based on experimental results rather than on mathematical models.

Blanc, D

2000-01-01T23:59:59.000Z

267

Utility-Scale Power Tower Solar Systems: Performance Acceptance Test Guidelines  

SciTech Connect (OSTI)

The purpose of these Guidelines is to provide direction for conducting performance acceptance testing for large power tower solar systems that can yield results of a high level of accuracy consistent with good engineering knowledge and practice. The recommendations have been developed under a National Renewable Energy Laboratory (NREL) subcontract and reviewed by stakeholders representing concerned organizations and interests throughout the concentrating solar power (CSP) community. An earlier NREL report provided similar guidelines for parabolic trough systems. These Guidelines recommend certain methods, instrumentation, equipment operating requirements, and calculation methods. When tests are run in accordance with these Guidelines, we expect that the test results will yield a valid indication of the actual performance of the tested equipment. But these are only recommendations--to be carefully considered by the contractual parties involved in the Acceptance Tests--and we expect that modifications may be required to fit the particular characteristics of a specific project.

Kearney, D.

2013-03-01T23:59:59.000Z

268

Prototype Test Results of the Solar Tower Atmospheric Cherenkov Effect Experiment (STACEE)  

E-Print Network [OSTI]

There are currently no experiments, either satellite or ground-based, that are sensitive to astrophysical gamma-rays at energies between 20 and 250 GeV. We are developing the Solar Tower Atmospheric Cherenkov Effect Experiment (STACEE) to explore this energy range. STACEE will use heliostat mirrors at a solar research facility to collect Cherenkov light from extensive air showers produced by high energy gamma-rays. Here we report on the results of prototype test work at the solar facility of Sandia National Laboratories (Albuquerque, NM). The work demonstrates that the facility is suitable for use as an astrophysical observatory. In addition, using a full scale prototype of part of STACEE, we detected atmospheric Cherenkov radiation at energies lower than any other ground-based experiment to date.

STACEE Collaboration

1997-04-03T23:59:59.000Z

269

Planck early results: Spectral energy distributions and radio continuum spectra of northern extragalactic radio sources  

E-Print Network [OSTI]

Spectral energy distributions (SEDs) and radio continuum spectra are presented for a northern sample of 104 extragalactic radio sources, based on the Planck Early Release Compact Source Catalog (ERCSC) and simultaneous multifrequency data. The nine Planck frequencies, from 30 to 857 GHz, are complemented by a set of simultaneous observations ranging from radio to gamma-rays. This is the first extensive frequency coverage in the radio and millimetre domains for an essentially complete sample of extragalactic radio sources, and it shows how the individual shocks, each in their own phase of development, moving in the relativistic jet, shape the radio spectra. The SEDs presented in this paper were fitted with second and third degree polynomials to estimate the frequencies of the synchrotron and inverse Compton (IC) peaks, and the spectral indices of low and high frequency radio data, including the Planck ERCSC data, were calculated. SED modelling methods are discussed, with an emphasis on proper, physical modelli...

Aatrokoski, J; Aghanim, N; Aller, H D; Aller, M F; Angelakis, E; Arnaud, M; Ashdown, M; Aumont, J; Baccigalupi, C; Balbi, A; Banday, A J; Barreiro, R B; Bartlett, J G; Battaner, E; Benabed, K; Benot, A; Berdyugin, A; Bernard, J -P; Bersanelli, M; Bhatia, R; Bonaldi, A; Bonavera, L; Bond, J R; Borrill, J; Bouchet, F R; Bucher, M; Burigana, C; Burrows, D N; Cabella, P; Capalbi, M; Cappellini, B; Cardoso, J -F; Catalano, A; Cavazzuti, E; Cayn, L; Challinor, A; Chamballu, A; Chary, R -R; Chiang, L -Y; Christensen, P R; Clements, D L; Colafrancesco, S; Colombi, S; Couchot, F; Coulais, A; Cutini, S; Cuttaia, F; Danese, L; Davies, R D; Davis, R J; de Bernardis, P; de Gasperis, G; de Rosa, A; de Zotti, G; Delabrouille, J; Delouis, J -M; Dickinson, C; Dole, H; Donzelli, S; Dor, O; Drl, U; Douspis, M; Dupac, X; Efstathiou, G; Enlin, T A; Finelli, F; Forni, O; Frailis, M; Franceschi, E; Fuhrmann, L; Galeotta, S; Ganga, K; Gargano, F; Gasparrini, D; Gehrels, N; Giard, M; Giardino, G; Giglietto, N; Giommi, P; Giordano, F; Giraud-Hraud, Y; Gonzlez-Nuevo, J; Grski, K M; Gratton, S; Gregorio, A; Gruppuso, A; Harrison, D; Henrot-Versill, S; Herranz, D; Hildebrandt, S R; Hivon, E; Hobson, M; Holmes, W A; Hovest, W; Hoyland, R J; Huffenberger, K M; Jaffe, A H; Juvela, M; Keihnen, E; Keskitalo, R; King, O; Kisner, T S; Kneissl, R; Knox, L; Krichbaum, T P; Kurki-Suonio, H; Lagache, G; Lhteenmki, A; Lamarre, J -M; Lasenby, A; Laureijs, R J; Lavonen, N; Lawrence, C R; Leach, S; Leonardi, R; Len-Tavares, J; Linden-V\\ornle, M; Lindfors, E; Lpez-Caniego, M; Lubin, P M; Macas-Prez, J F; Maffei, B; Maino, D; Mandolesi, N; Mann, R; Maris, M; Martnez-Gonzlez, E; Masi, S; Massardi, M; Matarrese, S; Matthai, F; Max-Moerbeck, W; Mazziotta, M N; Mazzotta, P; Melchiorri, A; Mendes, L; Mennella, A; Michelson, P F; Mingaliev, M; Mitra, S; Miville-Deschnes, M -A; Moneti, A; Monte, C; Montier, L; Morgante, G; Mortlock, D; Munshi, D; Murphy, A; Naselsky, P; Natoli, P; Nestoras, I; Netterfield, C B; Nieppola, E; Nilsson, K; N\\orgaard-Nielsen, H U; Noviello, F; Novikov, D; Novikov, I; O'Dwyer, I J; Osborne, S; Pajot, F; Partridge, B; Pasian, F; Patanchon, G; Pavlidou, V; Pearson, T J; Perdereau, O; Perotto, L; Perri, M; Perrotta, F; Piacentini, F; Piat, M; Plaszczynski, S; Platania, P; Pointecouteau, E; Polenta, G; Ponthieu, N; Poutanen, T; Przeau, G; Prunet, S; Puget, J -L; Rachen, J P; Rain, S; Reach, W T; Readhead, A; Rebolo, R; Reeves, R; Reinecke, M; Reinthal, R; Renault, C; Ricciardi, S; Richards, J; Riller, T; Riquelme, D; Ristorcelli, I; Rocha, G; Rosset, C; Rowan-Robinson, M; Rubi\; Rusholme, B; Saarinen, J; Sandri, M; Savolainen, P; Scott, D; Seiffert, M D; Sievers, A; Sillanp, A; Smoot, G F; Sotnikova, Y; Starck, J -L; Stevenson, M; Stivoli, F; Stolyarov, V; Sudiwala, R; Sygnet, J -F; Takalo, L; Tammi, J; Tauber, J A; Terenzi, L; Thompson, D J; Toffolatti, L; Tomasi, M; Tornikoski, M; Torre, J -P; Tosti, G; Tramacere, A; Tristram, M; Tuovinen, J; Trler, M; Turunen, M; Umana, G; Ungerechts, H; Valenziano, L; Valtaoja, E; Varis, J; Verrecchia, F; Vielva, P; Villa, F; Vittorio, N; Wandelt, B D; Wu, J; Yvon, D; Zacchei, A; Zensus, J A; Zhou, X; Zonca, A

2011-01-01T23:59:59.000Z

270

Spectrum hole identification and exploitation in cognitive radio networks.  

E-Print Network [OSTI]

??Cognitive radio networks are envisaged as the solution for effective spectrum management for the future communications. In a cognitive radio network, the unlicensed users are (more)

Vamsi Krishna Tumuluru.

2011-01-01T23:59:59.000Z

271

Life Cycle Greenhouse Gas Emissions of Trough and Tower Concentrating Solar Power Electricity Generation: Systematic Review and Harmonization  

SciTech Connect (OSTI)

In reviewing life cycle assessment (LCA) literature of utility-scale concentrating solar power (CSP) systems, this analysis focuses on reducing variability and clarifying the central tendency of published estimates of life cycle greenhouse gas (GHG) emissions through a meta-analytical process called harmonization. From 125 references reviewed, 10 produced 36 independent GHG emissions estimates passing screens for quality and relevance: 19 for parabolic trough (trough) technology and 17 for power tower (tower) technology. The interquartile range (IQR) of published estimates for troughs and towers were 83 and 20 grams of carbon dioxide equivalent per kilowatt-hour (g CO2-eq/kWh),1 respectively; median estimates were 26 and 38 g CO2-eq/kWh for trough and tower, respectively. Two levels of harmonization were applied. Light harmonization reduced variability in published estimates by using consistent values for key parameters pertaining to plant design and performance. The IQR and median were reduced by 87% and 17%, respectively, for troughs. For towers, the IQR and median decreased by 33% and 38%, respectively. Next, five trough LCAs reporting detailed life cycle inventories were identified. The variability and central tendency of their estimates are reduced by 91% and 81%, respectively, after light harmonization. By harmonizing these five estimates to consistent values for global warming intensities of materials and expanding system boundaries to consistently include electricity and auxiliary natural gas combustion, variability is reduced by an additional 32% while central tendency increases by 8%. These harmonized values provide useful starting points for policy makers in evaluating life cycle GHG emissions from CSP projects without the requirement to conduct a full LCA for each new project.

Burkhardt, J. J.; Heath, G.; Cohen, E.

2012-04-01T23:59:59.000Z

272

High power radio frequency attenuation device  

DOE Patents [OSTI]

A resistor device for attenuating radio frequency power includes a radio frequency conductor connected to a series of fins formed of high relative magnetic permeability material. The fins are dimensional to accommodate the skin depth of the current conduction therethrough, as well as an inner heat conducting portion where current does not travel. Thermal connections for air or water cooling are provided for the inner heat conducting portions of each fin. Also disclosed is a resistor device to selectively alternate unwanted radio frequency energy in a resonant cavity.

Kerns, Quentin A. (Bloomingdale, IL); Miller, Harold W. (Winfield, IL)

1984-01-01T23:59:59.000Z

273

Spectrum Leasing via Distributed Cooperation in Cognitive Radio  

E-Print Network [OSTI]

Spectrum Leasing via Distributed Cooperation in Cognitive Radio Igor Stanojev1 , Osvaldo Simeone1 for cognitive radio. I. INTRODUCTION Cognitive radio is a debated new paradigm for efficient spectrum or unlicensed model [1], requires secondary users to first sense the radio environment in search of spectrum

Yener, Aylin

274

Spectrum Leasing via Distributed Cooperation in Cognitive Radio  

E-Print Network [OSTI]

Spectrum Leasing via Distributed Cooperation in Cognitive Radio Igor Stanojev1, Osvaldo Simeone1 for cognitive radio. I. INTRODUCTION Cognitive radio is a debated new paradigm for efficient spectrum or unlicensed model [1], requires secondary users to first sense the radio environment in search of spectrum

Simeone, Osvaldo

275

Collaborative Spectrum Sensing from Sparse Observations in Cognitive Radio Networks  

E-Print Network [OSTI]

1 Collaborative Spectrum Sensing from Sparse Observations in Cognitive Radio Networks Jia (Jasmine for the implementation of cognitive radio. Collaborative spectrum sensing among the cognitive radio nodes is expected to improve the ability of checking complete spectrum usage. Due to hardware limitations, each cognitive radio

Yin, Wotao

276

Demonstration of Real-time Spectrum Sensing for Cognitive Radio  

E-Print Network [OSTI]

Demonstration of Real-time Spectrum Sensing for Cognitive Radio Zhe Chen, Nan Guo, and Robert C sensing detects the availability of the radio frequency spectrum in a real-time fashion, which is essen Cognitive radio (CR) has been put forward to make effi- cient use of scarce radio frequency spectrum

Qiu, Robert Caiming

277

Two Phase Spectrum Sharing for Frequency-Agile Radio Networks  

E-Print Network [OSTI]

1 Two Phase Spectrum Sharing for Frequency-Agile Radio Networks Zhenhua Feng and Yaling Yang of modern radios. We solve a joint spectrum sharing and end-to-end rate control problems for general technologies (e.g. software defined radio and cognitive radios) enable more flexible spectrum access through

Ha, Dong S.

278

SAMER: Spectrum Aware Mesh Routing in Cognitive Radio Networks  

E-Print Network [OSTI]

SAMER: Spectrum Aware Mesh Routing in Cognitive Radio Networks SHORT PAPER Ioannis Pefkianakis1 in licensed bands, to meet the increasing demand for radio spectrum. The new open spectrum operation--Cognitive Radio, Spectrum Aware Routing I. INTRODUCTION Cognitive radio networks (CORNET) are an emerging multihop

Lu, Songwu

279

Partial Cooperation for Spectrum Sharing in Cognitive Radio Network  

E-Print Network [OSTI]

Partial Cooperation for Spectrum Sharing in Cognitive Radio Network Lok Man Law1, Fen Hou2, Jianwei that many licensed radio spectrums are heavily under-utilized. Cognitive radio technology can improve spectrum, without affecting the normal communications of the primary licensed users. In cognitive radio

Paris-Sud XI, Université de

280

Partial Cooperation for Spectrum Sharing in Cognitive Radio Network  

E-Print Network [OSTI]

that many licensed radio spectrums are heavily under-utilized. Cognitive radio technology can improve spectrum, without affecting the normal communications of the primary licensed users. In cognitive radioPartial Cooperation for Spectrum Sharing in Cognitive Radio Network Lok Man Law1, Fen Hou2, Jianwei

Huang, Jianwei

Note: This page contains sample records for the topic "wolc radio tower" 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

Cooperative Opportunistic Large Array Approach for Cognitive Radio Networks  

E-Print Network [OSTI]

clearly shows that the licensed radio spectrum is underutilized continuously across time and space [1 to the radio spectrum congestion problem by opportunistic uses of the spectral holes to achieve efficient use created huge demand of radio spectrum. The radio spectrum is a scarce natural resource. Due

Hansen, René Rydhof

282

Utilisation des Protocoles HARQ pour la Radio Cognitive  

E-Print Network [OSTI]

Utilisation des Protocoles HARQ pour la Radio Cognitive Romain Tajan encadré/01/2012 #12;Plan 1 Introduction 2 La Radio Cognitive Techniques de la Radio Cognitive Méthodes d'accès 3 performances du protocole IR-HARQ 4 Utilisation des protocoles HARQ pour la Radio Cognitive Utilisation de l

Dobigeon, Nicolas

283

Energy Efficient Transmissions In MIMO Cognitive Radio Networks  

E-Print Network [OSTI]

Energy Efficient Transmissions In MIMO Cognitive Radio Networks Liqun Fu The Institute of Network@ie.cuhk.edu.hk Abstract-In this paper, we consider energy efficient transmis sions for MIMO cognitive radio networks. Index Terms-Cognitive radio networks, MIMO, Energy efficiency. I. INTRODUCTION Cognitive radio, which

Huang, Jianwei

284

Owens Valley Radio ObsevatoryOwens Valley Radio Obsevatory David Woody  

E-Print Network [OSTI]

Owens Valley Radio ObsevatoryOwens Valley Radio Obsevatory David Woody Owens Valley Radio · [Need pictures of the telescopes] 1/24/2008 2Woody #12;The Owens ValleyThe Owens Valley 1/24/2008 3Woody in the future · 40 m ­ 1960s ­ 1-20 GHz ­ Long history single dish and VLBI · VLBA antenna, 25 m dia · Misc. ­ 5

Weinreb, Sander

285

THE COMPACT RADIO STRUCTURE OF RADIO-LOUD NARROW LINE SEYFERT 1 GALAXIES  

SciTech Connect (OSTI)

We present the compact radio structure of three radio-loud narrow line Seyfert 1 galaxies from the Very Long Baseline Array archive data at 2.3, 5, and 8.4 GHz. In RXS J16290+4007, the radio structure is mostly unresolved. The combination of compact radio structure, high brightness temperature, and inverted spectrum between simultaneous 2.3 and 8.4 GHz strongly favors jet relativistic beaming. Combined with the very long baseline interferometry data at 1.6 and 8.4 GHz from the literature, we argue that RXS J16333+4718 also may harbor a relativistic jet, with resolved core-jet structure in 5 GHz. B3 1702+457 is clearly resolved with a well-defined jet component. The overall radio steep spectrum indicates that B3 1702+457 is likely a source optically defined as NLS1 with radio definition of compact steep spectrum sources. From these three sources, we found that radio loud NLS1s can be either intrinsically radio loud (e.g., B3 1702+457) or apparently radio loud due to jet beaming effects (e.g., RXS J16290+4007 and RXS J16333+4718).

Gu Minfeng; Chen Yongjun, E-mail: gumf@shao.ac.c [Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai 200030 (China)

2010-06-15T23:59:59.000Z

286

Public safety radios must pool spectrum  

E-Print Network [OSTI]

The dynamic-spectrum-access research and development community is maturing technologies that will enable radios to share RF spectrum much more intensively. The adoption of DSA technologies by the public-safety community ...

Lehr, William Herndon

287

Spectral radio observations of a solar eclipse  

Science Journals Connector (OSTI)

Measurements were made of the 7 March, 1970 solar eclipse by the AFCRL Sagamore Hill Radio Observatory in Hamilton, Massachusetts, on the wavelengths of 0.86,...m...=0.96) occurred at eclipse maximum. Source flux...

R. M. Straka

1971-12-01T23:59:59.000Z

288

Radio Frequency Identification : regulating information privacy protection  

E-Print Network [OSTI]

As applications of Radio Frequency Identification (RFID) become more profuse, the technology itself is stirring up some controversy. Due to its potential for amassing large amounts of information about both people and ...

Laufer, Deanna (Deanna Raquel)

2007-01-01T23:59:59.000Z

289

Need a Classroom Stimulus? Introduce Radio Astronomy  

Science Journals Connector (OSTI)

Silently invisibly ceaselessly our planet Earth is showered by radio waves from every direction and from every region of space. This radio energy originates in our solar system throughout the Milky Way galaxy and far beyond out to the remotest reaches of the universe. Detecting and unraveling the origins of these invisible signals is what radio astronomy is all about. This ever?present radiation provides astronomers with an alternate non?optical window to the universe revealing exotic and unfamiliar phenomena previously undetected by even the most powerful optical telescopes. For physics teachers a classroom discussion of these radio discoveries however brief offers an opportunity for igniting interest (and possibly a career option) in even the most apathetic of students. This paper describes first the background of some of these events and second (in the appendixes) a selection of numerical problems so that students can derive for themselves the truly mind?stretching features of these celestial objects.

Samuel Derman

2010-01-01T23:59:59.000Z

290

Radio Wavelength Observatories within the Exploration Architecture  

E-Print Network [OSTI]

Observations at radio wavelengths address key problems in astrophysics, astrobiology, and lunar structure including the first light in the Universe (the Epoch of Reionization), the presence of magnetic fields around extrasolar planets, particle acceleration mechanisms, and the structure of the lunar ionosphere. Moreover, achieving the performance needed to address these scientific questions demands observations at wavelengths longer than those that penetrate the Earth's ionosphere, observations in extremely "radio quiet" locations such as the Moon's far side, or both. We describe a series of lunar-based radio wavelength interferometers of increasing capability. The Radio Observatory for Lunar Sortie Science (ROLSS) is an array designed to be deployed during the first lunar sorties (or even before via robotic rovers) and addressing particle acceleration and the lunar ionosphere. Future arrays would be larger, more capable, and deployed as experience is gained in working on the lunar surface.

J. Lazio; R. J. Macdowall; J. Burns; L. Demaio; D. L. Jones; K. W. Weiler

2007-01-26T23:59:59.000Z

291

EARS (Enhancing Access to the Radio Spectrum) PROGRAM: The radio spectrum is a finite but exceedingly valuable natural resource that  

E-Print Network [OSTI]

EARS (Enhancing Access to the Radio Spectrum) PROGRAM: The radio spectrum is a finite communications, among a multitude of others. During the last two decades, the use of the radio spectrum has on the topic of Enhancing Access to the Radio Spectrum. The charge to the workshop was "to identify

Cetiner, Bedri A.

292

Low Luminosity Radio Loud Active Galactic Nuclei  

E-Print Network [OSTI]

I review observational properties of low power radio loud AGN. High resolution VLBI observations allow the estimate of the jet velocity and orientation with respect to the line of sight and the determination of the Doppler factor. These data reveal rich structures, including two-sided jets and secondary components. New results on 1144+35, a giant radio source with superluminal motion are shown in detail.

G. Giovannini; M. Giroletti

2007-08-30T23:59:59.000Z

293

TheGoldenGateBridgeWeatherJuly2010,Vol.65,No.7 fog, but the north tower had a story to tell. It  

E-Print Network [OSTI]

. It worked as a chimney. The fog entered and escaped through the openings of the tower, displaying iridescent they are caused by an object's shadows. Sightings of fogbows, solar glories, solar coronas, Brocken Spectres

Reading, University of

294

WindPACT Turbine Design Scaling Studies Technical Area 3ŒSelf-Erecting Tower and Nacelle Feasibility  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

1 * NREL/SR-500-29493 1 * NREL/SR-500-29493 Global Energy Concepts, LLC Kirkland, Washington WindPACT Turbine Design Scaling Studies Technical Area 3-Self-Erecting Tower and Nacelle Feasibility March 2000-March 2001 National Renewable Energy Laboratory 1617 Cole Boulevard Golden, Colorado 80401-3393 NREL is a U.S. Department of Energy Laboratory Operated by Midwest Research Institute * * * * Battelle * * * * Bechtel Contract No. DE-AC36-99-GO10337 May 2001 * NREL/SR-500-29493 WindPACT Turbine Design Scaling Studies Technical Area 3-Self-Erecting Tower and Nacelle Feasibility March 2000-March 2001 Global Energy Concepts, LLC Kirkland, Washington NREL Technical Monitor: Alan Laxson Prepared under Subcontract No. YAM-0-30203-01 National Renewable Energy Laboratory 1617 Cole Boulevard

295

The PNL single-tower measurement model of rotationally sampled turbulent wind, with user's guide for STRS2PC  

SciTech Connect (OSTI)

This report describes a single-tower rotationally sampled wind model, STRS-2, that approximates a set of time series of turbulent wind experienced by individual points rotating in circles in a crosswind plane using measurements from anemometers arrayed vertically along a single line. The purposes of the model are (1) to use turbulence measurements made economically from conventional single-tower arrays of anemometers, (2) to incorporate measures characteristics of the wind at specific sites under consideration for operation of wind turbines, spanning the height range if interest, and (3) to estimate the unmeasured turbulence characteristics in the crosswind plane that spans the disk of the rotor blades. 17 refs., 15 figs., 5 tabs.

Connell, J.R.; Morris, V.R.; Powell, D.C.; Gower, G.L.

1988-06-01T23:59:59.000Z

296

Radio Planetary Nebulae in the Magellanic Clouds  

E-Print Network [OSTI]

We report the extragalactic radio-continuum detection of 15 planetary nebulae (PNe) in the Magellanic Clouds (MCs) from recent Australia Telescope Compact Array+Parkes mosaic surveys. These detections were supplemented by new and high resolution radio, optical and IR observations which helped to resolve the true nature of the objects. Four of the PNe are located in the Small Magellanic Cloud (SMC) and 11 are located in the Large Magellanic Cloud (LMC). Based on Galactic PNe the expected radio flux densities at the distance of the LMC/SMC are up to ~2.5 mJy and ~2.0 mJy at 1.4 GHz, respectively. We find that one of our new radio PNe in the SMC has a flux density of 5.1 mJy at 1.4 GHz, several times higher than expected. We suggest that the most luminous radio PN in the SMC (N S68) may represent the upper limit to radio peak luminosity because it is ~3 times more luminous than NGC 7027, the most luminous known Galactic PN. We note that the optical diameters of these 15 MCs PNe vary from very small (~0.08 pc or ...

Filipovi?, M D; Reid, W A; Payne, J L; Parker, Q A; Crawford, E J; Boji?i?, I S; De Horta, A Y; Hughes, A; Dickel, J; Stootman, F

2009-01-01T23:59:59.000Z

297

Abell 1033: birth of a radio phoenix  

E-Print Network [OSTI]

Extended steep-spectrum radio emission in a galaxy cluster is usually associated with a recent merger. However, given the complex scenario of galaxy cluster mergers, many of the discovered sources hardly fit into the strict boundaries of a precise taxonomy. This is especially true for radio phoenixes that do not have very well defined observational criteria. Radio phoenixes are aged radio galaxy lobes whose emission is reactivated by compression or other mechanisms. Here, we present the detection of a radio phoenix close to the moment of its formation. The source is located in Abell 1033, a peculiar galaxy cluster which underwent a recent merger. To support our claim, we present unpublished Westerbork Synthesis Radio Telescope and Chandra observations together with archival data from the Very Large Array and the Sloan Digital Sky Survey. We discover the presence of two sub-clusters displaced along the N-S direction. The two sub-clusters probably underwent a recent merger which is the cause of a moderately per...

de Gasperin, F; van Weeren, R J; Dawson, W A; Brggen, M; Bonafede, A; Simionescu, A

2015-01-01T23:59:59.000Z

298

X-Ray Observations of Radio Galaxies  

E-Print Network [OSTI]

We review some of the ways that X-ray observations provide unique information on radio galaxies. Thermal bremsstrahlung X-ray emission provides detailed data on ambient densities and temperatures. These parameters in turn can be used for pressure balance calculations and can demonstrate how the ambient gas affects radio source structure. Additionally, many signatures of the interaction of radio jets and lobes with the hot gas are found in high resolution X-ray maps. Non-thermal X-ray emission from knots and hotspots of radio jets can give us constraints on the relativistic electron population for energies greater that that normally sampled in the radio (in the case of synchrotron emission) or can give us an independent estimate of the average magnetic field strength (if inverse Compton emission is the origin of the X-rays). From recent ROSAT HRI observations of 3C 390.3 and 3C 120, we show evidence that X-ray emission from knots and hotspots appears to be associated with regions of large gradients in the radio surface brightness; i.e. at the location of powerful shocks.

D. E. Harris

1998-04-20T23:59:59.000Z

299

Separation of Fine Particles from Gases in Wet Flue Gas Desulfurization System Using a Cascade of Double Towers  

Science Journals Connector (OSTI)

Separation of Fine Particles from Gases in Wet Flue Gas Desulfurization System Using a Cascade of Double Towers ... The authors thank the High-Tech Research and Development Program of China (No. 2008AA05Z306), the Natural Science Foundation of Jiangsu Province (No. BK2008283), and the Scientific Research Foundation of Graduate School of Southeast University for their financial support. ... with high performance by cascading packed columns. ...

Jingjing Bao; Linjun Yang; Shijuan Song; Guilong Xiong

2012-02-15T23:59:59.000Z

300

ARRA FEMP Technical Assistance -- Federal Aviation Administration Project 209 -- Control Tower and Support Building, Palm Springs, CA  

SciTech Connect (OSTI)

This report represents findings of a design review team that evaluated construction documents (at the 100% level) and operating specifications for a new control tower and support building that will be built in Palm Springs, California by the Federal Aviation Administration (FAA). The focus of the review was to identify measures that could be incorporated into the final design and operating specifications that would result in additional energy savings for the FAA that would not have otherwise occurred.

Arends, J.; Sandusky, William F.

2010-03-31T23:59:59.000Z

Note: This page contains sample records for the topic "wolc radio tower" 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

Structural Design Considerations for Tubular Power Tower Receivers Operating at 650 Degrees C: Preprint  

SciTech Connect (OSTI)

Research of advanced power cycles has shown supercritical carbon dioxide power cycles may have thermal efficiency benefits relative to steam cycles at temperatures around 500 - 700 degrees C. To realize these benefits for CSP, it is necessary to increase the maximum outlet temperature of current tower designs. Research at NREL is investigating a concept that uses high-pressure supercritical carbon dioxide as the heat transfer fluid to achieve a 650 degrees C receiver outlet temperature. At these operating conditions, creep becomes an important factor in the design of a tubular receiver and contemporary design assumptions for both solar and traditional boiler applications must be revisited and revised. This paper discusses lessons learned for high-pressure, high-temperature tubular receiver design. An analysis of a simplified receiver tube is discussed, and the results show the limiting stress mechanisms in the tube and the impact on the maximum allowable flux as design parameters vary. Results of this preliminary analysis indicate an underlying trade-off between tube thickness and the maximum allowable flux on the tube. Future work will expand the scope of design variables considered and attempt to optimize the design based on cost and performance metrics.

Neises, T. W.; Wagner, M. J.; Gray, A. K.

2014-04-01T23:59:59.000Z

302

A new method for the design of the heliostat field layout for solar tower power plant  

Science Journals Connector (OSTI)

A new method for the design of the heliostat field layout for solar tower power plant is proposed. In the new method, the heliostat boundary is constrained by the receiver geometrical aperture and the efficiency factor which is the product of the annual cosine efficiency and the annual atmospheric transmission efficiency of heliostat. With the new method, the annual interception efficiency does not need to be calculated when places the heliostats, therefore the total time of design and optimization is saved significantly. Based on the new method, a new code for heliostat field layout design (HFLD) has been developed and a new heliostat field layout for the PS10 plant at the PS10 location has been designed by using the new code. Compared with current PS10 layout, the new designed heliostats have the same optical efficiency but with a faster response speed. In addition, to evaluate the feasibility of crops growth on the field land under heliostats, a new calculation method for the annual sunshine duration on the land surface is proposed as well.

Xiudong Wei; Zhenwu Lu; Zhifeng Wang; Weixing Yu; Hongxing Zhang; Zhihao Yao

2010-01-01T23:59:59.000Z

303

A model for noise radiated by submerged piles and towers in littoral environments  

Science Journals Connector (OSTI)

Pile driving in shallow water during the construction of bridges and other structures can produce transient broadband noise of sufficient intensity to kill fish and disturb marine mammals. Sustained tonal noise radiated by towers supporting offshore wind turbines contains energy in frequency bands that may inhibit detection of coastal activities via passive sonar and seismic sensors. Understanding the generation and propagation of underwater noise due to pile driving and wind farms is important for determining the best strategies for mitigating the environmental impact of these noisesources. An analytic model based on a Green's function approach is presented for the sound radiated in the water column by a submerged cylindrical structure embedded in horizontally stratified layers of sediment. The sediment layers are modeled as viscoelastic media and the Green's function is derived via angular spectrum decomposition. Noise radiation due to both vibration of the structure and impulses delivered to the sediment is considered. Contributions to the pressure field in the water column due to radiation directly into the water radiation from the sediment into the water and Scholte waves propagating along the sediment-water interface will be discussed. [Work supported by the ARL:UT IR&D program.

Todd A. Hay; Yurii A. Ilinskii; Evgenia A. Zabolotskaya; Preston S. Wilson; Mark F. Hamilton

2011-01-01T23:59:59.000Z

304

Giant Metrewave Radio Telescope observations of X-shaped radio sources  

Science Journals Connector (OSTI)

......obtained GMRT data at 240 and 610 MHz for almost all the known X-shaped...all the sources at 240 and 610 MHz show the characteristic X-shape...supersonic or buoyant flow of radio plasma in an asymmetric gas distribution...the lobe into an elliptical atmosphere and that all radio galaxies......

Dharam Vir Lal; A. Pramesh Rao

2007-01-21T23:59:59.000Z

305

Deep Spitzer observations of infrared-faint radio sources: high-redshift radio-loud AGN?  

E-Print Network [OSTI]

Oliver,5 Nick Seymour15 and Jason Surace6 1 CSIRO Australia Telescope National Facility, PO Box 76 Telescope Large Area Survey (ATLAS: Norris et al. 2006) as radio sources with no observable IR counterpart) and Middelberg et al. (2008a) have identified 51 such sources out of 2002 radio sources in the ATLAS survey. So

Norris, Ray

306

The Enigmatic Radio Afterglow of GRB 991216  

E-Print Network [OSTI]

We present wide-band radio observations spanning from 1.4 GHz to 350 GHz of the afterglow of GRB 991216, taken from 1 to 80 days after the burst. The optical and X-ray afterglow of this burst were fairly typical and are explained by a jet fireball. In contrast, the radio light curve is unusual in two respects: (a) the radio light curve does not show the usual rise to maximum flux on timescales of weeks and instead appears to be declining already on day 1 and (b) the power law indices show significant steepening from the radio through the X-ray bands. We show that the standard fireball model, in which the afterglow is from a forward shock, is unable to account for (b) and we conclude that the bulk of the radio emission must arise from a different source. We consider two models, neither of which can be ruled out with the existing data. In the first (conventional) model, the early radio emission is attributed to emission from the reverse shock as in the case of GRB 990123. We predict that the prompt optical emission would have been as bright (or brighter) than 8th magnitude. In the second (exotic) model, the radio emission originates from the forward shock of an isotropically energetic fireball (10^54 erg) expanding into a tenuous medium (10^-4 cm^-3). The resulting fireball would remain relativistic for months and is potentially resolvable with VLBI techniques. Finally, we note that the near-IR bump of the afterglow is similar to that seen in GRB 971214 and no fireball model can explain this bump.

D. A. Frail; E. Berger; T. Galama; S. R. Kulkarni; G. H. Moriarty-Schieven; G. G. Pooley; R. Sari; D. S. Shepherd; G. B. Taylor; F. Walter

2000-03-09T23:59:59.000Z

307

Observing, modeling and predicting the effects of solar radio bursts on radio communications  

Science Journals Connector (OSTI)

The Sun is a source of broadband radio noise which can reach significantly high levels during outbursts associated with the time evolution of the activity cycle. The statistics point out that the maximum occurrence frequency and intensity of solar radio bursts (SRBs) are observed in the proximity of the activity maximum but relevant phenomena can occur also in the raising and declining phases of the cycle. Both theoretical estimations based on extensive statistical analyses carried out in recent years and direct observations performed in the past solar activity cycle indicate that solar radio bursts can interfere wireless communications as well as Global Navigation Satellite Systems (GNSS). In this work we briefly review the theoretical basis and the experimental evidences to date and we show the effectiveness of fast multichannel solar radiopolarimeters like the Trieste Solar Radio System in monitoring and predicting solar radio noise increase in the framework of Space Weather applications.

Mauro Messerotti

2008-01-01T23:59:59.000Z

308

Cognitive Radio will revolutionize American transportation  

ScienceCinema (OSTI)

Cognitive Radio will revolutionize American transportation. Through smart technology, it will anticipate user needs; detect available bandwidths and frequencies then seamlessly connect vehicles, infrastructures, and consumer devices; and it will support the Department of Transportation IntelliDrive Program, helping researchers, auto manufacturers, and Federal and State officials advance the connectivity of US transportation systems for improved safety, mobility, and environmental conditions. Using cognitive radio, a commercial vehicle will know its driver, onboard freight and destination route. Drivers will save time and resources communicating with automatic toll booths and know ahead of time whether to stop at a weigh station or keep rolling. At accident scenes, cognitive radio sensors on freight and transportation modes can alert emergency personnel and measure on-site, real-time conditions such as a chemical leak. The sensors will connect freight to industry, relaying shipment conditions and new delivery schedules. For industry or military purposes, cognitive radio will enable real-time freight tracking around the globe and its sensory technology can help prevent cargo theft or tampering by alerting shipper and receiver if freight is tampered with while en route. For the average consumer, a vehicle will tailor the transportation experience to the passenger such as delivering age-appropriate movies via satellite. Cognitive radio will enhance transportation safety by continually sensing what is important to the user adapting to its environment and incoming information, and proposing solutions that improve mobility and quality of life.

None

2013-12-06T23:59:59.000Z

309

Cognitive Radio will revolutionize American transportation  

SciTech Connect (OSTI)

Cognitive Radio will revolutionize American transportation. Through smart technology, it will anticipate user needs; detect available bandwidths and frequencies then seamlessly connect vehicles, infrastructures, and consumer devices; and it will support the Department of Transportation IntelliDrive Program, helping researchers, auto manufacturers, and Federal and State officials advance the connectivity of US transportation systems for improved safety, mobility, and environmental conditions. Using cognitive radio, a commercial vehicle will know its driver, onboard freight and destination route. Drivers will save time and resources communicating with automatic toll booths and know ahead of time whether to stop at a weigh station or keep rolling. At accident scenes, cognitive radio sensors on freight and transportation modes can alert emergency personnel and measure on-site, real-time conditions such as a chemical leak. The sensors will connect freight to industry, relaying shipment conditions and new delivery schedules. For industry or military purposes, cognitive radio will enable real-time freight tracking around the globe and its sensory technology can help prevent cargo theft or tampering by alerting shipper and receiver if freight is tampered with while en route. For the average consumer, a vehicle will tailor the transportation experience to the passenger such as delivering age-appropriate movies via satellite. Cognitive radio will enhance transportation safety by continually sensing what is important to the user adapting to its environment and incoming information, and proposing solutions that improve mobility and quality of life.

None

2013-07-22T23:59:59.000Z

310

Extended emission around GPS radio sources  

E-Print Network [OSTI]

Extended radio emission detected around a sample of GHz Peaked Spectrum (GPS) radio sources is discussed. Evidence for extended emission which is related to the GPS source is found in 6 objects out of 33. Three objects are associated with quasars with core-jet pc-scale morphology, and three are identified with galaxies with symmetric (CSO) radio morphology. We conclude that the core-jet GPS quasars are likely to be beamed objects with a continuous supply of energy from the core to the kpc scale. It is also possible that low surface brightness extended radio emission is present in other GPS quasars but the emission is below our detection limit due to the high redshifts of the objects. On the other hand, the CSO/galaxies with extended large scale emission may be rejuvenated sources where the extended emission is the relic of previous activity. In general, the presence of large scale emission associated with GPS galaxies is uncommon, suggesting that in the context of the recurrent activity model, the time scale between subsequent bursts is in general longer than the radiative lifetime of the radio emission from the earlier activity.

C. Stanghellini; C. P. O'Dea; D. Dallacasa; P. Cassaro; S. A. Baum; R. Fanti; C. Fanti

2005-07-21T23:59:59.000Z

311

Molecular gas in nearby powerful radio galaxies  

E-Print Network [OSTI]

We report the detection of CO(1-0) and CO(2-1) emission from the central region of nearby 3CR radio galaxies (z$gas content is below 10$^9$ \\msun. Their individual CO emission exhibit, for 5 cases, a double-horned line profile that is characteristic of an inclined rotating disk with a central depression at the rising part of its rotation curve. The inferred disk or ring distributions of the molecular gas is consistent with the observed presence of dust disks or rings detected optically in the cores of the galaxies. We reason that if their gas originates from the mergers of two gas-rich disk galaxies, as has been invoked to explain the molecular gas in other radio galaxies, then these galaxies must have merged a long time ago (few Gyr or more) but their remnant elliptical galaxies only recently (last 10$^7$ years or less) become active radio galaxies. Instead, we argue the the cannibalism of gas-rich galaxies provide a simpler explanation for the origin of molecular gas in the elliptical hosts of radio galaxies (Lim et al. 2000). Given the transient nature of their observed disturbances, these galaxies probably become active in radio soon after the accretion event when sufficient molecular gas agglomerates in their nuclei.

S. Leon; J. Lim; F. Combes; D. Van-Trung

2001-07-26T23:59:59.000Z

312

Incorporating supercritical steam turbines into molten-salt power tower plants : feasibility and performance.  

SciTech Connect (OSTI)

Sandia National Laboratories and Siemens Energy, Inc., examined 14 different subcritical and supercritical steam cycles to determine if it is feasible to configure a molten-salt supercritical steam plant that has a capacity in the range of 150 to 200 MWe. The effects of main steam pressure and temperature, final feedwater temperature, and hot salt and cold salt return temperatures were determined on gross and half-net efficiencies. The main steam pressures ranged from 120 bar-a (subcritical) to 260 bar-a (supercritical). Hot salt temperatures of 566 and 600%C2%B0C were evaluated, which resulted in main steam temperatures of 553 and 580%C2%B0C, respectively. Also, the effects of final feedwater temperature (between 260 and 320%C2%B0C) were evaluated, which impacted the cold salt return temperature. The annual energy production and levelized cost of energy (LCOE) were calculated using the System Advisory Model on 165 MWe subcritical plants (baseline and advanced) and the most promising supercritical plants. It was concluded that the supercritical steam plants produced more annual energy than the baseline subcritical steam plant for the same-size heliostat field, receiver, and thermal storage system. Two supercritical steam plants had the highest annual performance and had nearly the same LCOE. Both operated at 230 bar-a main steam pressure. One was designed for a hot salt temperature of 600%C2%B0C and the other 565%C2%B0C. The LCOEs for these plants were about 10% lower than the baseline subcritical plant operating at 120 bar-a main steam pressure and a hot salt temperature of 565%C2%B0C. Based on the results of this study, it appears economically and technically feasible to incorporate supercritical steam turbines in molten-salt power tower plants.

Pacheco, James Edward; Wolf, Thorsten [Siemens Energy, Inc., Orlando, FL; Muley, Nishant [Siemens Energy, Inc., Orlando, FL

2013-03-01T23:59:59.000Z

313

Technology to Facilitate the Use of Impaired Waters in Cooling Towers  

SciTech Connect (OSTI)

The project goal was to develop an effective silica removal technology and couple that with existing electro-dialysis reversal (EDR) technology to achieve a cost effective treatment for impaired waters to allow for their use in the cooling towers of coal fired power plants. A quantitative target of the program was a 50% reduction in the fresh water withdrawal at a levelized cost of water of $3.90/Kgal. Over the course of the program, a new molybdenum-modified alumina was developed that significantly outperforms existing alumina materials in silica removal both kinetically and thermodynamically. The Langmuir capacity is 0.11g silica/g adsorbent. Moreover, a low cost recycle/regeneration process was discovered to allow for multiple recycles with minimal loss in activity. On the lab scale, five runs were carried out with no drop in performance between the second and fifth run in ability to absorb the silica from water. The Mo-modified alumina was successfully prepared on a multiple kilogram scale and a bench scale model column was used to remove 100 ppm of silica from 400 liters of simulated impaired water. Significant water savings would result from such a process and the regeneration process could be further optimized to reduce water requirements. Current barriers to implementation are the base cost of the adsorbent material and the fine powder form that would lead to back pressure on a large column. If mesoporous materials become more commonly used in other areas and the price drops from volume and process improvements, then our material would also lower in price because the amount of molybdenum needed is low and no additional processing is required. There may well be engineering solutions to the fine powder issue; in a simple concept experiment, we were able to pelletize our material with Boehmite, but lost performance due to a dramatic decrease in surface area.

Colborn, Robert

2012-04-30T23:59:59.000Z

314

The Cryogenic Dark Matter Search: First 5-Tower Data and Improved Understanding of Ionization Collection  

SciTech Connect (OSTI)

The Cryogenic Dark Matter Search (CDMS) is searching for Weakly Interacting Massive Particles (WIMPs) with cryogenic particle detectors. These detectors have the ability to discriminate between nuclear recoil candidate and electron recoil background events by collecting both phonon and ionization energy from recoils in the detector crystals. The CDMS-II experiment has completed analysis of the first data runs with 30 semiconductor detectors at the Soudan Underground Laboratory, resulting in a world leading WIMP-nucleon spin-independent cross section limit for WIMP masses above 44 GeV/c{sup 2}. As CDMS aims to achieve greater WIMP sensitivity, it is necessary to increase the detector mass and discrimination between signal and background events. Incomplete ionization collection results in the largest background in the CDMS detectors as this causes electron recoil background interactions to appear as false candidate events. Two primary causes of incomplete ionization collection are surface and bulk trapping. Recent work has been focused on reducing surface trapping through the modification of fabrication methods for future detectors. Analyzing data taken with test devices has shown that hydrogen passivation of the amorphous silicon blocking layer worsens surface trapping. Additional data has shown that the iron-ion implantation used to lower the critical temperature of the tungsten transition-edge sensors causes a degradation of the ionization collection. Using selective implantation on future detectors may improve ionization collection for events near the phonon side detector surface. Bulk trapping is minimized by neutralizing ionized lattice impurities. Detector investigations at testing facilities and in situ at the experimental site have provided methods to optimize the neutralization process and monitor running conditions to maintain full ionization collection. This work details my contribution to the 5-tower data taking, monitoring, and analysis effort as well as the SuperCDMS detector development with the focus on monitoring and improving ionization collection in the detectors.

Bailey, Catherine N.; /Case Western Reserve U.

2010-01-01T23:59:59.000Z

315

ON THE EVOLUTION OF THE CORES OF RADIO SOURCES AND THEIR EXTENDED RADIO EMISSION  

SciTech Connect (OSTI)

The work in this paper aims at determining the evolution and possible co-evolution of radio-loud active galactic nuclei (AGNs) and their cores via their radio luminosity functions (i.e., total and core RLFs, respectively). Using a large combined sample of 1063 radio-loud AGNs selected at low radio frequency, we investigate the RLF at 408 MHz of steep-spectrum radio sources. Our results support a luminosity-dependent evolution. Using core flux density data of the complete sample 3CRR, we investigate the core RLF at 5.0 GHz. Based on the combined sample with incomplete core flux data, we also estimate the core RLF using a modified factor of completeness. Both results are consistent and show that the comoving number density of radio cores displays a persistent decline with redshift, implying a negative density evolution. We find that the core RLF is obviously different from the total RLF at the 408 MHz band which is mainly contributed by extended lobes, implying that the cores and extended lobes could not be co-evolving at radio emission.

Yuan Zunli; Wang Jiancheng, E-mail: yuanzunli@ynao.ac.cn [National Astronomical Observatories, Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011 (China)

2012-01-10T23:59:59.000Z

316

LOFAR, a new low frequency radio telescope  

E-Print Network [OSTI]

LOFAR, the Low Frequency Array, is a large radio telescope consisting of approximately 100 soccer-field sized antenna stations spread over a region of 400 km in diameter. It will operate at frequencies from ~10 to 240 MHz, with a resolution at 240 MHz of better than an arcsecond. Its superb sensitivity will allow for studies of a broad range of astrophysical topics, including reionisation, transient radio sources and cosmic rays, distant galaxies and AGNs. In this contribution a status rapport of the LOFAR project and an overview of the science case is presented.

H. J. A. Rottgering

2003-09-19T23:59:59.000Z

317

FINAL REPORT: EDDY-COVARIANCE FLUX TOWER AND TRACER TECHNOLOGY SUPPORT FOR THE UNIVERSITY OF GEORGIA PROPOSAL: FROM TOWER TO PIXEL: INTEGRATION OF PATCH-SIZE NEE USING EXPERIMENTAL MODELING FOOTPRINT ANALYSIS.  

SciTech Connect (OSTI)

Brookhaven National Laboratory has been funded since October of 2000 to provide assistance to the University of Georgia in conducting footprint analyses of individual towers based on meteorology and trace gas measurements. Brookhaven researchers conducted air flow measurements using perfluorocarbon tracers and meteorological instrumentation for three experimental campaigns at an AmeriFlux research site maintained by Dr. Monique Leclerc near Gainesville, FL. In addition, BNL provided assistance with remote data collection and distribution from remote field sites operated by Dr. John Hom of the US Forest Service in the Pine Barrens of New Jersey and at FACE research sites in North Carolina and Wisconsin.

LEWIN,K.F.; NAGY, J.; WATSON, T.B.

2007-09-01T23:59:59.000Z

318

Burst Radio-Frequency Excited Pulsed Hollow-Cathode Lamp  

Science Journals Connector (OSTI)

Transient emission characteristics of a hollow-cathode lamp driven by a pulsed current in combination with a radio-frequency burst signal are described. The radio-frequency field...

Araki, Tsutomu; Walters, John P; Minami, Shigeo

1980-01-01T23:59:59.000Z

319

Software-defined Radio based Wireless Tomography: Experimental Demonstration and  

E-Print Network [OSTI]

1 Software-defined Radio based Wireless Tomography: Experimental Demonstration and Verification presents an experimental demonstration of Software-Defined Radio (SDR) based wireless tomography us- ing follows our vision and previous theoretical study of wireless tomography which combines wireless

Qiu, Robert Caiming

320

Calculating the probability of detecting radio signals from alien civilizations  

E-Print Network [OSTI]

Although it might not be self-evident, it is in fact entirely possible to calculate the probability of detecting alien radio signals by understanding what types of extraterrestrial radio emissions can be expected and what properties these emissions can have. Using the Drake equation as the obvious starting point, and logically identifying and enumerating constraints of interstellar radio communications can yield the probability of detecting a genuine alien radio signal.

Marko Horvat

2007-07-14T23:59:59.000Z

Note: This page contains sample records for the topic "wolc radio tower" 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
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321

Calculating the probability of detecting radio signals from alien civilizations  

E-Print Network [OSTI]

Although it might not be self-evident, it is in fact entirely possible to calculate the probability of detecting alien radio signals by understanding what types of extraterrestrial radio emissions can be expected and what properties these emissions can have. Using the Drake equation as the obvious starting point, and logically identifying and enumerating constraints of interstellar radio communications can yield the probability of detecting a genuine alien radio signal.

Horvat, Marko

2006-01-01T23:59:59.000Z

322

National Radio Astronomy Observatory Electronics Division Technical Note No. 219  

E-Print Network [OSTI]

1 National Radio Astronomy Observatory Electronics Division Technical Note No. 219 Measurements of Automotive Radar Emissions received by a Radio Astronomy Observatory Darrel Emerson (National Radio Astronomy (Continental Corporation, A.D.C. Automotive Distance Control Systems GmbH, Germany), Juergen

Groppi, Christopher

323

1 Spectrum Sharing Games of Network Operators and Cognitive Radios  

E-Print Network [OSTI]

Contents 1 Spectrum Sharing Games of Network Operators and Cognitive Radios Mohammad Hossein advances in radio technology, the spectrum regulators have opened some parts of the available spectrum operators and cognitive radios. Because of the dynamic nature of spectrum sharing, it is difficult

Bencsáth, Boldizsár

324

THE COMPACT STEEP SPECTRUM AND GHZ PEAKED SPECTRUM RADIO SOURCES  

E-Print Network [OSTI]

THE COMPACT STEEP SPECTRUM AND GHZ PEAKED SPECTRUM RADIO SOURCES Christopher P. O'Dea Space@stsci.edu ABSTRACT I review the radio to X­ray properties of GHz Peaked Spectrum (GPS) and Compact Steep Spectrum The GHz Peaked Spectrum (GPS) and Compact Steep Spectrum (CSS) radio sources make up significant fractions

325

Sequential Detection based Cooperative Spectrum Sensing Algorithms in Cognitive Radio  

E-Print Network [OSTI]

Sequential Detection based Cooperative Spectrum Sensing Algorithms in Cognitive Radio Arun considers the problem of Spectrum Sensing in Cognitive Radio Networks. For this we use a recently developed is not experienced by our algorithm. Keywords-Cognitive Radio, Cooperative Spectrum Sensing, Decentralized Sequential

Sharma, Vinod

326

Competitive Interference-aware Spectrum Access in Cognitive Radio Networks  

E-Print Network [OSTI]

Competitive Interference-aware Spectrum Access in Cognitive Radio Networks Jocelyne Elias, Fabio studies the spectrum access problem in cognitive radio networks from a game theoretical perspective. Finally, we provide numerical results of the proposed spectrum access game in several cognitive radio

Boyer, Edmond

327

High Throughput Spectrum-aware Routing for Cognitive Radio Networks  

E-Print Network [OSTI]

High Throughput Spectrum-aware Routing for Cognitive Radio Networks Ashwin Sampath, Lei Yang, Lili, wireless nodes equipped with cognitive radios [11] do not operate on statically as- signed spectrum who own the spectrum, e.g. analog TV broadcast stations. Such flexibility means cognitive radios can

Zhao, Ben Y.

328

Censored Truncated Sequential Spectrum Sensing for Cognitive Radio Networks  

E-Print Network [OSTI]

1 Censored Truncated Sequential Spectrum Sensing for Cognitive Radio Networks Sina Maleki Geert Leus Abstract Reliable spectrum sensing is a key functionality of a cognitive radio network. Cooperative spectrum sensing improves the detection reliability of a cognitive radio system but also increases

Leus, Geert

329

A Framework for Radio Frequency Spectrum Measurement and Analysis  

E-Print Network [OSTI]

A Framework for Radio Frequency Spectrum Measurement and Analysis V. Rory Petty ITTC-FY2008-TR allocation and the burgeoning problem of spectrum scarcity have prompted an examination of how the radio frequency spectrum is utilized. The radio frequency spectrum is an important national resource that impacts

Kansas, University of

330

Robust Performance of Spectrum Sensing in Cognitive Radio Networks  

E-Print Network [OSTI]

1 Robust Performance of Spectrum Sensing in Cognitive Radio Networks Shimin Gong, Ping Wang) in cognitive radio networks requires SUs to be spectrum aware and know which spectrum bands are occupied by PUs and reduces the system sensitivity on decision variables. Index Terms Cognitive radio network, spectrum

Huang, Jianwei

331

: Correlation-Based Cooperative Spectrum Sensing in Cognitive Radio Networks  

E-Print Network [OSTI]

(CORN)2 : Correlation-Based Cooperative Spectrum Sensing in Cognitive Radio Networks Dongyue Xue is referred to as cognitive radio networks (CRNs) [2]. Based on the ambient spectrum information, cognitive for cognitive radio networks to minimize energy consumption. A sensing quality metric is defined as a measure

Paris-Sud XI, Université de

332

Reputation Aware Collaborative Spectrum Sensing for Mobile Cognitive Radio Networks  

E-Print Network [OSTI]

Reputation Aware Collaborative Spectrum Sensing for Mobile Cognitive Radio Networks Abstract ­ The task of spectrum sensing for Dynamic Spectrum Access in Cognitive Radio Networks (CRNs) is very of Cognitive Radio (CR) operation is the opportunistic utilization of licensed spectrum bands by the Secondary

Zou, Cliff C.

333

Throughput Enhancing Cooperative Spectrum Sensing Strategies for Cognitive Radios  

E-Print Network [OSTI]

Throughput Enhancing Cooperative Spectrum Sensing Strategies for Cognitive Radios Kyounghwan Lee growth of wireless services continues to accelerate the exhaustion of usable radio spectrum. The radio channels licensed to the primary users. A main chal- lenge in this case is to design a spectrum sensing

Yener, Aylin

334

Cryptographic Link Signatures for Spectrum Usage Authentication in Cognitive Radio  

E-Print Network [OSTI]

Cryptographic Link Signatures for Spectrum Usage Authentication in Cognitive Radio Xi Tan, Kapil frequency spectrum was inefficiently utilized. To fully use these spectrums, cognitive radio networks have of cognitive radio is to enable the current fixed spectrum channels assigned by Federal Communica- tions

Du, Wenliang "Kevin"

335

Quickest Spectrum Detection Using Hidden Markov Model for Cognitive Radio  

E-Print Network [OSTI]

Quickest Spectrum Detection Using Hidden Markov Model for Cognitive Radio Zhe Chen, Zhen Hu, Robert and recognition under the umbrella of cognitive radio. In the procedure of spectrum recognition, a frequency) opened free white space spectrum on November 4, 2008 [1]. Cognitive radio has been put forward as a more

Qiu, Robert Caiming

336

Robust Distributed Spectrum Sensing in Cognitive Radio Networks  

E-Print Network [OSTI]

unlicensed radios to operate in licensed spectrum, provided no harmful interference is expe- riencedRobust Distributed Spectrum Sensing in Cognitive Radio Networks Ruiliang Chen, Jung-Min Park {rlchen, jungmin, kgbian}@vt.edu Abstract--Distributed spectrum sensing (DSS) enables a Cog- nitive Radio

337

SOME UNSOLVED CHALLENGES IN RADIO-FREQUENCY HEATING AND  

E-Print Network [OSTI]

SOME UNSOLVED CHALLENGES IN RADIO-FREQUENCY HEATING AND CURRENT DRIVE N. J. FISCH* Princeton Plasma in the electronic version. I. INTRODUCTION There are many methods by which radio-frequency (rf) waves drive, 2013 doi:10.13182/FST13-682 Several unsolved challenges in radio-frequency heating and current drive

338

Rotating-radio-frequency ion traps T. Hasegawa*  

E-Print Network [OSTI]

rf ion trap, the rotating-radio-frequency rotating-rf trap, in which the motion of a charged particleRotating-radio-frequency ion traps T. Hasegawa* Department of Physics, Keio University, Kanagawa and Technology, Boulder, Colorado 80305, USA Received 9 July 2005; published 20 October 2005 We discuss a radio-frequency

339

GROUND-BASED AND SPACE-BASED RADIO OBSERVATIONS OF  

E-Print Network [OSTI]

discharge/flash consists of many consecutive strokes) [e.g. Gibbard et al., 1997] LightningGROUND-BASED AND SPACE-BASED RADIO OBSERVATIONS OF PLANETARY LIGHTNING P. Zarka1 , W. Farrell2 , G; Lightning's radio signature Space-based radio observations of planetary lightning Lightning

Demoulin, Pascal

340

Data Analysis in the Radio Astr 257: Modern Astronomical Techniques  

E-Print Network [OSTI]

Data Analysis in the Radio Emma Storm Astr 257: Modern Astronomical Techniques May 28th, 2013 Storm (Astr257) Radio Data Analysis 05/28/13 1 / 36 #12;Radio Data Analysis interferometers measure antenna to raw, uncalibrated data need to manually calibrate image processing depends on science goals Storm

California at Santa Cruz, University of

Note: This page contains sample records for the topic "wolc radio tower" 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

Energy Efficient Transmissions in MIMO Cognitive Radio Networks  

E-Print Network [OSTI]

Energy Efficient Transmissions in MIMO Cognitive Radio Networks Liqun Fu The Institute of Network@ie.cuhk.edu.hk Abstract--In this paper, we consider energy efficient transmis- sions for MIMO cognitive radio networks on the traffic load of the secondary system. Index Terms--Cognitive radio networks, MIMO, Energy- efficiency. I

Huang, Jianwei

342

Photonic Radio-Frequency Phase Detector based on Radio-Frequency to Intermediate-Frequency Phase Mapping  

Science Journals Connector (OSTI)

A photonic radio-frequency phase detector based on radio-frequency (RF) to intermediate-frequency mapping is demonstrated, and the theoretical principle of the design is explained.

Sun, Dongning; Dong, Yi; Wang, Siwei; Xia, Zongyang; Xie, Weilin; Shi, Hongxiao; Yi, Lilin; Hu, Weisheng

343

Optical Synchrotron Precursors of Radio Hypernovae  

E-Print Network [OSTI]

Some hypernova (HN) explosions accompany much brighter radio afterglows than those of ordinary core-collapse supernovae (SNe), which we here term radio HNe. Due to their association with low-luminosity gamma-ray bursts (llGRBs), and with implied relativistic ejecta velocities, previous studies suggested that the enhanced radio emissions are essentially energized by relativistic jets. By re-examining some observed radio HNe based on the refreshed shock model, we find, however, that they can be consistently explained by afterglow emissions from spherical HN explosions without jet component. In this model, a sequence of shock breakout shells interacts with the circumstellar wind medium and induces multi-band synchrotron emission. Our model can be confirmed by optical synchrotron precursors from ~ 1000 s to 1 day after shock breakouts, which are detectable by current and future high-cadence wide-field surveys. They can be also associated with ordinary HNe with an event rate of ~ 0.32/yr from <~ 40 Mpc. Most of...

Nakauchi, Daisuke; Nagakura, Hiroki; Suwa, Yudai; Nakamura, Takashi

2014-01-01T23:59:59.000Z

344

Radio Astronomy with Very Large Arrray  

Science Journals Connector (OSTI)

...construction of the Very Large Array of radio telk...role of the Very Large Array in c research...control building. atmosphere is transpi mainly...their wave-00. Large optical V,Iu...radia-tion to the area ofthe sky covered...Neutral H: 1420.4 MHz H, He, and so on...

R. M. Hjellming; R. C. Bignell

1982-06-18T23:59:59.000Z

345

Buoyant radio plasma in clusters of galaxies  

Science Journals Connector (OSTI)

......calculated maps of the radio surface brightness resulting from synchroton radiation. These maps were compiled for two different assumptions...find that some of these processes may prolong the phase of synchroton emission but if so, the bubbles will be exceedingly faint......

M. Brggen; C.R. Kaiser

2001-08-01T23:59:59.000Z

346

Reliable Link Maintenance in Cognitive Radio Systems  

E-Print Network [OSTI]

resources and overcome the under-utilization of licensed spectrum. Since the licensed user still keeps) have to vacate the spectrum in case the licensed user claims it. In order to maintain the qualityReliable Link Maintenance in Cognitive Radio Systems Daniel Willkomm, James Gross and Adam Wolisz

Gross, James

347

The Rapidly Pulsating Radio Source in Vulpecula  

Science Journals Connector (OSTI)

...ob-served frequencies (Table 1...the pulse radio frequency as a function...is the % plasma frequency...near 100 Mhz are given...fre-quency (RF) as a function of frequency. The straight...those at 430 Mhz by 0.279...than the plasma and cyclotron...arrival time at high frequency. High Low...

F. D. Drake; E. J. Gundermann; D. L. Jauncey; J. M. Comella; G. A. Zeissig; H. D. Craft Jr.

1968-05-03T23:59:59.000Z

348

Buoyant radio plasma in clusters of galaxies  

Science Journals Connector (OSTI)

......observing frequency of 330 MHz. In these maps the major...observing frequency is 330 MHz and for the redshift...volume-filling factor of the radio plasma is unity. The units...to note that the hot plasma remains confined within...explosions in the Earth's atmosphere. In their wake the bubbles......

M. Brggen; C.R. Kaiser

2001-08-01T23:59:59.000Z

349

Chameleonic Radio Technical Memo No. 11  

E-Print Network [OSTI]

Chameleonic Radio Technical Memo No. 11 An Audio System for the Blackfin S.M. Shajedul Hasan and S Institute & State University Blacksburg, VA 24061 #12;An Audio System for the Blackfin S.M. Shajedul Hasan Institute & State University, Blacksburg VA 24061 USA. E-mail: hasan@vt.edu 1 #12;1 Introduction

Ellingson, Steven W.

350

Chameleonic Radio Technical Memo No. 15  

E-Print Network [OSTI]

Receiver based on USRP and OSSIE," S.M. Shajedul Hasan and P. Balister, December 14, 2005. [3] 2. "An Hasan and S.W. Ellingson, January 24, 2006. [4] 3. "Implementation Status of the SCA-Based FM Radio," P Interface," S.M. Shajedul Hasan and Kyehun Lee, July 23, 2006

Ellingson, Steven W.

351

Chameleonic Radio Technical Memo No. 23  

E-Print Network [OSTI]

Hasan, M. Harun, and C.R. Anderson October 5, 2007 Bradley Dept. of Electrical & Computer Engineering S.W. Ellingson , S.M. Shajedul Hasan, M. Harun, and C.R. Anderson October 7, 2007 Contents 1 Wideband RF Downconverter for the NIJ Public Safety Radio," S.M. Shajedul Hasan and S.W. Ellingson

Ellingson, Steven W.

352

Determination, Control & Improvement of an SKA Radio  

E-Print Network [OSTI]

SKA core sites were chosen in a sparsely populated part of South Africa, in the Northern Cape ProvinceDetermination, Control & Improvement of an SKA Radio Environment in South Africa Three potential -200 -150 -100 -50 0 Frequency spectrum 150 to 174 MHz Spectralpowerflux-density Agg Signal Kalahari

Ellingson, Steven W.

353

2010 Raj JainCSE574sWashington University in St. Louis Radio FrequencyRadio Frequency  

E-Print Network [OSTI]

. Louis RFID ReadersRFID Readers Sends a pulse of radio energy and listens for tags response Readers may24-1 ©2010 Raj JainCSE574sWashington University in St. Louis Radio FrequencyRadio Frequency;24-3 ©2010 Raj JainCSE574sWashington University in St. Louis What is RFID?What is RFID? Radio Frequency

Jain, Raj

354

Abstract--Reconfigurable Radio Systems (RRS), based on Software Defined Radio (SDR) and Mobile Ad-hoc Network  

E-Print Network [OSTI]

Abstract--Reconfigurable Radio Systems (RRS), based on Software Defined Radio (SDR) and Mobile Ad-hoc by the proposed scheme, while keeping the important false positive rate at a very low level. Keywords--Mobile ad-hoc (SDR), Mobile Ad-hoc Networks (MANETs) and Cognitive Radio (CR). Research on these technologies has

355

Renovation of steam electric power plant cooling tower blowdown for non-potable reuse. Technical report 2 Sep 81-15 Jan 84  

SciTech Connect (OSTI)

Findings are presented of a nine month pilot plant study investigating non-potable reuse potential of electric power plant cooling tower blowdown. The two demineralizing technologies studies included reverse osmosis and electrodialysis. Pretreatment throughout the testing was performed using chemical softening/clarification and dual media filtration. During the investigation, about 4,000 operating hours were put on each of the two desalting technology membranes to obtain information on membrane life expectancy. The most promising treatment technologies which meet the make-up water quality requirements for reuse of the cooling tower blowdown in the tower recirculating water system, as determined by pilot treatment train performance, are discussed. Potential power plant water reuse applications have been identified along with the water quality and quantity requirements. Comparisons were then made to the treated blowdown quality achieved from each of the pilot process elements.

Osantowski, R.; Kane, J.; Geinopolos, A.

1984-01-01T23:59:59.000Z

356

A new code for the design and analysis of the heliostat field layout for power tower system  

Science Journals Connector (OSTI)

A new code for the design and analysis of the heliostat field layout for power tower system is developed. In the new code, a new method for the heliostat field layout is proposed based on the edge ray principle of nonimaging optics. The heliostat field boundary is constrained by the tower height, the receiver tilt angle and size and the heliostat efficiency factor which is the product of the annual cosine efficiency and the annual atmospheric transmission efficiency. With the new method, the heliostat can be placed with a higher efficiency and a faster response speed of the design and optimization can be obtained. A new module for the analysis of the aspherical heliostat is created in the new code. A new toroidal heliostat field is designed and analyzed by using the new code. Compared with the spherical heliostat, the solar image radius of the field is reduced by about 30% by using the toroidal heliostat if the mirror shape and the tracking are ideal. In addition, to maximize the utilization of land, suitable crops can be considered to be planted under heliostats. To evaluate the feasibility of the crop growth, a method for calculating the annual distribution of sunshine duration on the land surface is developed as well.

Xiudong Wei; Zhenwu Lu; Weixing Yu; Zhifeng Wang

2010-01-01T23:59:59.000Z

357

A new code for the design and analysis of the heliostat field layout for power tower system  

SciTech Connect (OSTI)

A new code for the design and analysis of the heliostat field layout for power tower system is developed. In the new code, a new method for the heliostat field layout is proposed based on the edge ray principle of nonimaging optics. The heliostat field boundary is constrained by the tower height, the receiver tilt angle and size and the heliostat efficiency factor which is the product of the annual cosine efficiency and the annual atmospheric transmission efficiency. With the new method, the heliostat can be placed with a higher efficiency and a faster response speed of the design and optimization can be obtained. A new module for the analysis of the aspherical heliostat is created in the new code. A new toroidal heliostat field is designed and analyzed by using the new code. Compared with the spherical heliostat, the solar image radius of the field is reduced by about 30% by using the toroidal heliostat if the mirror shape and the tracking are ideal. In addition, to maximize the utilization of land, suitable crops can be considered to be planted under heliostats. To evaluate the feasibility of the crop growth, a method for calculating the annual distribution of sunshine duration on the land surface is developed as well. (author)

Wei, Xiudong; Lu, Zhenwu; Yu, Weixing [Changchun Institute of Optics, Fine Mechanics and Physics of Chinese Academy of Sciences, Changchun 130033 (China); Wang, Zhifeng [The Key Laboratory of Solar Thermal Energy and Photovoltaic system, Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190 (China)

2010-04-15T23:59:59.000Z

358

Verification survey report of the south waste tank farm training/test tower and hazardous waste storage lockers at the West Valley demonstration project, West Valley, New York  

SciTech Connect (OSTI)

A team from ORAU's Independent Environmental Assessment and Verification Program performed verification survey activities on the South Test Tower and four Hazardous Waste Storage Lockers. Scan data collected by ORAU determined that both the alpha and alpha-plus-beta activity was representative of radiological background conditions. The count rate distribution showed no outliers that would be indicative of alpha or alpha-plus-beta count rates in excess of background. It is the opinion of ORAU that independent verification data collected support the site?s conclusions that the South Tower and Lockers sufficiently meet the site criteria for release to recycle and reuse.

Weaver, Phyllis C.

2012-08-29T23:59:59.000Z

359

A SAMPLE OF CANDIDATE RADIO STARS IN FIRST AND SDSS  

SciTech Connect (OSTI)

We conduct a search for radio stars by combining radio and optical data from the FIRST survey and the Sloan Digital Sky Survey (SDSS). The faint limit of SDSS makes possible a homogeneous search for radio emission from stars of low optical luminosity. We select a sample of 112 candidate radio stars in the magnitude range 15 < i {approx}< 19.1 and with radio flux S {sub 20} {>=} 1.25 mJy, from about 7000 deg{sup 2} of sky. The selection criteria are positional coincidence within 1'', radio and optical point source morphology, and an SDSS spectrum classified as stellar. The sample contamination is estimated by random matching to be 108 {+-} 13, suggesting that at most a small fraction of the selected candidates are genuine radio stars. Therefore, we rule out a very rare population of extremely radio-loud stars: no more than 1.2 of every million stars in the magnitude range 15 < i < 19.1 stars has radio flux S {sub 20} {>=} 1.25 mJy. We investigate the optical and radio colors of the sample to find candidates that show the largest likelihood of being real radio stars. The significant outliers from the stellar locus, as well as the magnetically active stars, are the best candidates for follow-up radio observations. We conclude that, while the present wide-area radio surveys are not sensitive enough to provide homogeneous samples of the extremely rare radio stars, upcoming surveys that exploit the great sensitivity of current and planned telescopes do have sufficient sensitivity and will allow the properties of this class of object to be investigated in detail.

Kimball, Amy E.; Ivezic, Zeljko; Plotkin, Richard M. [Department of Astronomy, University of Washington, Box 351580, Seattle, WA 98195-1580 (United States); Knapp, Gillian R.; Gordon, Michael S. [Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544 (United States); West, Andrew A.; Bochanski, John J. [Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139 (United States)], E-mail: akimball@astro.washington.edu

2009-08-10T23:59:59.000Z

360

California Code of Regulations, Title 8, Section 1646. Tower Scaffolds and Rolling Scaffolds, Wood or Metal. This information is provided free of charge by the Department of Industrial Relations from its  

E-Print Network [OSTI]

California Code of Regulations, Title 8, Section 1646. Tower Scaffolds and Rolling Scaffolds, Wood Scaffolds and Rolling Scaffolds, Wood or Metal. (a) The minimum dimension of the base of any free of Regulations, Title 8, Section 1646. Tower Scaffolds and Rolling Scaffolds, Wood or Metal. projecting end

Eisen, Michael

Note: This page contains sample records for the topic "wolc radio tower" 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

On the black-hole mass -- radio luminosity relation for flat-spectrum radio-loud quasars  

E-Print Network [OSTI]

A new analysis of the connection between black-hole mass and radio luminosity in radio-selected flat-spectrum quasars (FSQ) is presented. In contrast to recent claims in the literature, we find no evidence that the black-hole masses of radio-selected FSQ are systematically lower that those of luminous optically-selected radio-loud quasars. The black-hole masses of the FSQ are estimated via the virial black-hole mass estimator which utilizes the line-width of the H$\\beta$ emission line as a tracer of the central gravitational potential. By correcting for the inevitable effects of inclination, incurred due to the FSQ being viewed close to the line of sight, we find that the black-hole masses of the FSQ with intrinsically powerful radio jets are confined, virtually exclusively, to M_bh > 10^8 M_solar. This is in good agreement with previous studies of optically selected FSQ and steep-spectrum radio-loud quasars. Finally, following the application of a realistic Doppler boosting correction, we find that the FSQ occupy a wide range in intrinsic radio luminosity, and that many sources would be more accurately classified as radio-intermediate or radio-quiet quasars. This range in radio luminosity suggests that the FSQ are fully consistent with an upper boundary on radio power of the form L_5GHz \\propto M_bh^2.5.

Matt J. Jarvis; Ross J. McLure

2002-08-21T23:59:59.000Z

362

RADIoLOGICALsURvEY AT  

Office of Legacy Management (LM)

RADIoLOGICALsURvEY RADIoLOGICALsURvEY AT 1411 CENTRAL AVENUE DETROIT, MICHIGAN Prepared by M.R. LANDIS Environmental Survey and Site Assessment Program Energy/Environment Systems Division Oak Ridge Associated Universities Oak Ridge, TN 37831-0117 Project Staff J.D. Berger H.J. Laudeman C.H. Searcy T.J. Sowell D.A. Gibson E.A. Powell S.M. Shanmugan C.F. Weaver Prepared for U.S. Department of Energy as part of the Formerly Utilized Sites - Remedial Action Program FINAL REPORT FEBRUARY 1990 This report is based on work performed under contract number DE-AC05-760R00033 with the U.S. Department of Energy. TABLE OF CONTENTS ListofFigures .......................... List of Tables. ........................... Introduction ............................ Facility Description. ........................

363

Cosmological origin of anomalous radio background  

SciTech Connect (OSTI)

The ARCADE 2 collaboration has reported a significant excess in the isotropic radio background, whose homogeneity cannot be reconciled with clustered sources. This suggests a cosmological origin prior to structure formation. We investigate several potential mechanisms and show that injection of relativistic electrons through late decays of a metastable particle can give rise to the observed excess radio spectrum through synchrotron emission. However, constraints from the cosmic microwave background (CMB) anisotropy, on injection of charged particles and on the primordial magnetic field, present a challenge. The simplest scenario is with a ?>9 GeV particle decaying into e{sup +}e{sup ?} at a redshift of z ? 5, in a magnetic field of ? 5?G, which exceeds the CMB B-field constraints, unless the field was generated after decoupling. Decays into exotic millicharged particles can alleviate this tension, if they emit synchroton radiation in conjunction with a sufficiently large background magnetic field of a dark U(1)' gauge field.

Cline, James M. [Department of Physics, McGill University, 3600 Rue University, Montral, Qubec, H3A 2T8 Canada (Canada); Vincent, Aaron C., E-mail: jcline@physics.mcgill.ca, E-mail: vincent@ific.uv.es [Instituto de Fsica Corpuscular, Universitat de Valncia - CSIC, 46071, Valencia (Spain)

2013-02-01T23:59:59.000Z

364

Radio bursts from Solar System planets  

E-Print Network [OSTI]

interaction · Kinetic energy flux on obstacle cross-section : Pk ~ NmV2 V Robs 2 N=No/d2 No=5 cm-3 m~1.1?mp RobsP 2 #12;Flow Obstacle Weakly/Not magnetized (Solar wind) Strongly magnetized (Jovian magnetosphereRadio bursts from Solar System planets and Extrasolar planets Philippe Zarka Observatoire de Paris

Demoulin, Pascal

365

Radio Source Evolution on Galactic Scales  

E-Print Network [OSTI]

profile external atmosphere. Key words: galaxies: jets radiation mechanisms: non-thermal galaxies: active 1 INTRODUCTION Understanding the detailed evolution of radio-loud jets and co- coons as they propagate through the intragalactic and intracluster... shocks the IGM/ICM at the hotspot, and once the jet material becomes under-dense, a backflow of material at the hotspot inflates enormous cocoons filled with a plasma of particles and magnetic fields. The jet pushes forward and the co- coon expands...

Maciel, T.; Alexander, P.

2014-01-01T23:59:59.000Z

366

Preparing a public database of radio sources  

E-Print Network [OSTI]

We have collected the largest existing set of radio source lists in machine-readable form: 320 tables with 1.75 million records. Only a minor fraction of these is accessible via public databases. We describe our plans to make this huge amount of heterogeneous data accessible in a homogeneous way via the World Wide Web, with reliable cross-identifications, and searchable by various observables.

H. Andernach; S. A. Trushkin; A. G. Gubanov; O. V. Verkhodanov; V. B. Titov; A. Micol

1996-07-22T23:59:59.000Z

367

Radio frequency (RF) heated supersonic flow laboratory  

SciTech Connect (OSTI)

A unique supersonic flow apparatus which employs an inductively-coupled, radio frequency (RF) torch to supply high enthalpy source gas to the nozzle inlet is described. The main features of this system are the plasma tube, a cooled nozzle assembly, and a combustion/expansion chamber with a heat exchanger. A description of these components with current test data is presented. In addition, a discussion of anticipated experiments utilizing this system is included.

Wantuck, P.; Watanabe, H.

1990-01-01T23:59:59.000Z

368

SIMULTANEOUS X-RAY AND RADIO OBSERVATIONS OF ROTATING RADIO TRANSIENT J1819-1458  

SciTech Connect (OSTI)

We present the results of simultaneous radio and X-ray observations of PSR J18191458. Our 94 ks XMM-Newton observation of the high magnetic field (?5 10{sup 13} G) pulsar reveals a blackbody spectrum (kT ? 130 eV) with a broad absorption feature, possibly composed of two lines at ?1.0 and ?1.3 keV. We performed a correlation analysis of the X-ray photons with radio pulses detected in 16.2 hr of simultaneous observations at 1-2 GHz with the Green Bank, Effelsberg, and Parkes telescopes, respectively. Both the detected X-ray photons and radio pulses appear to be randomly distributed in time. We find tentative evidence for a correlation between the detected radio pulses and X-ray photons on timescales of less than 10 pulsar spin periods, with the probability of this occurring by chance being 0.46%. This suggests that the physical process producing the radio pulses may also heat the polar-cap.

Miller, J. J.; McLaughlin, M. A. [Department of Physics, West Virginia University, Morgantown, WV 26506 (United States); Rea, N. [Institut de Cincies de l'Espai (IEEC-CSIC) Campus UAB, Fac. de Cincies, Torre C5, parell, 2a planta, E-08193 Barcelona (Spain); Lazaridis, K.; Keane, E. F.; Kramer, M. [Max Planck Institut fr Radioastronomie, Auf dem Hgel 69, D-53121 Bonn (Germany); Lyne, A. [Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, University of Manchester, Manchester M13 9PL (United Kingdom)

2013-10-20T23:59:59.000Z

369

Barrier Immune Radio Communications for Demand Response  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Barrier Immune Radio Communications for Demand Response Barrier Immune Radio Communications for Demand Response Title Barrier Immune Radio Communications for Demand Response Publication Type Report LBNL Report Number LBNL-2294e Year of Publication 2009 Authors Rubinstein, Francis M., Girish Ghatikar, Jessica Granderson, Paul Haugen, Carlos Romero, and David S. Watson Keywords technologies Abstract Various wireless technologies were field-tested in a six-story laboratory building to identify wireless technologies that can scale for future DR applications through very low node density power consumption, and unit cost. Data analysis included analysis of the signal-to-noise ratio (SNR), packet loss, and link quality at varying power levels and node densities. The narrowband technologies performed well, penetrating the floors of the building with little loss and exhibiting better range than the wideband technology. 900 MHz provided full coverage at 1 watt and substantially complete coverage at 500 mW at the test site. 900 MHz was able to provide full coverage at 100 mW with only one additional relay transmitter, and was the highest-performing technology in the study. 2.4 GHz could not provide full coverage with only a single transmitter at the highest power level tested (63 mW). However, substantially complete coverage was provided at 2.4 GHz at 63 mW with the addition of one repeater node.

370

Cosmology with SKA Radio Continuum Surveys  

E-Print Network [OSTI]

Radio continuum surveys have, in the past, been of restricted use in cosmology. Most studies have concentrated on cross-correlations with the cosmic microwave background to detect the integrated Sachs-Wolfe effect, due to the large sky areas that can be surveyed. As we move into the SKA era, radio continuum surveys will have sufficient source density and sky area to play a major role in cosmology on the largest scales. In this chapter we summarise the experiments that can be carried out with the SKA as it is built up through the coming decade. We show that the SKA can play a unique role in constraining the non-Gaussianity parameter to \\sigma(f_NL) ~ 1, and provide a unique handle on the systematics that inhibit weak lensing surveys. The SKA will also provide the necessary data to test the isotropy of the Universe at redshifts of order unity and thus evaluate the robustness of the cosmological principle.Thus, SKA continuum surveys will turn radio observations into a central probe of cosmological research in th...

Jarvis, Matt J; Blake, Chris; Brown, Michael L; Lindsay, Sam N; Raccanelli, Alvise; Santos, Mario; Schwarz, Dominik

2015-01-01T23:59:59.000Z

371

Particle acceleration in double radio sources  

Science Journals Connector (OSTI)

Further study has been made of a model of extragalactic double radio sources in which the magnetized accretion disc of a massive black hole acts as an electric dynamo producing oppositely directed beams of relativistic particles. An empty region of small angular sizea vortice coreis shown to be a possible consequence of the hydrodynamics of accretion of gas with angular momentum. An ambient magnetic field in the gas tends to accumulate in the core region. The acceleration of electrons in the dynamo electric field gives rise to oppositely directed electron beams which in turn produce synchroton gamma rays collimated along the core. Collisions between the gamma rays and low energy photons caN initiate an electromagnetic cascade shower. The cascade acts to produce a collimated relativistic electron?positron beam. If the current flow in the dynamo occurs in surges then the outward propagation of the head of the electronpositron beams may produce expanding compact radio components. The electronpositron beam is ballistic in nature and it is electrically neutral and carries no current. Such a beam appears to have favorable stability properties. The beam is eventually stopped and spread out in pitch angle by the ram pressure of the external medium. Synchrotron radiated lobes of double radio sources.

R. V. E. Lovelace; J. MacAuslan; M. Burns

1979-01-01T23:59:59.000Z

372

Discovery of a Radio Flare from GRB 990123  

E-Print Network [OSTI]

We report the discovery of a radio counterpart to GRB 990123. In contrast to previous well-studied radio afterglows which rise to peak flux on a timescale of a week and then decay over several weeks to months, the radio emission from this GRB was clearly detected one day after the burst, after which it rapidly faded away. The simplest interpretation of this ``radio flare'' is that it arises from the reverse shock. In the framework of the afterglow models discussed to date, a forward shock origin for the flare is ruled out by our data. However, at late times, some radio afterglow emission (commensurate with the observed late-time optical emission, the optical afterglow) is expected from the forward shock. The relative faintness of the observed late-time radio emission provides an independent indication for a jet-like geometry in this GRB. We use the same radio observations to constrain two key parameters of the forward shock, peak flux and peak frequency, to within a factor of two. These values are inconsistent with the notion advocated by several authors that the prompt optical emission detected by ROTSE smoothly joins the optical afterglow emission. Finally, with hindsight we now recognize another such radio flare and this suggests that one out of eight GRBs has a detectable radio flare. This abundance coupled with the reverse shock interpretation suggests that the radio flare phenomenon has the potential to shed new light into the physics of reverse shocks in GRBs.

S. R. Kulkarni; D. A. Frail; R. Sari; G. H. Moriarty-Schieven; D. S. Shepherd; P. Udomprasert; A. C. S. Readhead; J. S. Bloom; M. Feroci; E. Costa

1999-03-30T23:59:59.000Z

373

Montblanc: GPU accelerated Radio Interferometer Measurement Equations in support of Bayesian Inference for Radio Observations  

E-Print Network [OSTI]

We present Montblanc, a GPU implementation of the Radio interferometer measurement equation (RIME) in support of the Bayesian inference for radio observations (BIRO) technique. BIRO uses Bayesian inference to select sky models that best match the visibilities observed by a radio interferometer. To accomplish this, BIRO evaluates the RIME multiple times, varying sky model parameters to produce multiple model visibilities. Chi-squared values computed from the model and observed visibilities are used as likelihood values to drive the Bayesian sampling process and select the best sky model. As most of the elements of the RIME and chi-squared calculation are independent of one another, they are highly amenable to parallel computation. Additionally, Montblanc caters for iterative RIME evaluation to produce multiple chi-squared values. Only modified model parameters are transferred to the GPU between each iteration. We implemented Montblanc as a Python package based upon NVIDIA's CUDA architecture. As such, it is ea...

Perkins, Simon; Zwart, Jonathan; Natarajan, Iniyan; Smirnov, Oleg

2015-01-01T23:59:59.000Z

374

23.11.2014bo Akademi Univ -Thermal and Flow Engineering Piispankatu 8, 20500 Turku 1/36 7. Air conditioning, cooling towers  

E-Print Network [OSTI]

23.11.2014?bo Akademi Univ - Thermal and Flow Engineering Piispankatu 8, 20500 Turku 1/36 7. Air conditioning, cooling towers Ron Zevenhoven ?bo Akademi University Thermal and Flow Engineering Laboratory Engineering Piispankatu 8, 20500 Turku 2/36 7.1 Humid air #12;23.11.2014 ?bo Akademi Univ - Thermal and Flow

Zevenhoven, Ron

375

Green Building Technological Approaches for Re-alization from an Investors Perspective based on the MUNICH RE Tower as an Example  

E-Print Network [OSTI]

The Development ?MUNICH RE TOWER? was built from 2001-2003 by MEAG MUNICH ERGO AssetManagement GmbH un-der the Management of Hubert Garzorz. In 1999 the architects Allmann Sattler Wappner won the first prize of the architectural competition and were assigned...

Garzorz, H.

2008-01-01T23:59:59.000Z

376

LANIER, BRYAN KEITH. Study in the Improvement in Strength and Stiffness Capacity of Steel Multi-sided Monopole Towers Utilizing Carbon Fiber Reinforced  

E-Print Network [OSTI]

Multi-sided Monopole Towers Utilizing Carbon Fiber Reinforced Polymers as a Retrofitting Mechanism a strengthening solution utilizing high-modulus carbon fiber polymers as a retrofitting mechanism for monopole the behavior and validates the effectiveness of carbon fiber in increasing the flexural capacity of existing

377

SNR Denton US LLP 1301 K Street, NW Suite 600, East Tower Washington, DC 20005-3364 USA  

Broader source: Energy.gov (indexed) [DOE]

SNR Denton US LLP SNR Denton US LLP 1301 K Street, NW Suite 600, East Tower Washington, DC 20005-3364 USA Thomas C. Jensen Partner thomas.jensen@snrdenton.com D +1 202 408 3956 M 703 304 5211 T +1 202 408 6400 F +1 202 408 6399 snrdenton.com March 28, 2012 BY E-MAIL Lamont Jackson Office of Electricity Delivery and Energy Reliability Mail Code: OE-20 U.S. Department of Energy 1000 Independence Avenue SW Washington, DC 20585 Re: OE Docket No. RRTT-IR-001 Dear Mr. Jackson:: This letter is submitted on behalf of PPL Electric and Public Service Electric and Gas Company ("PSE&G") 1 ,(referred to herein as "the Companies") with respect to the Susquehanna-Roseland

378

Anderson Tower of States and Nematic Order of Spin-1 Bosonic Atoms on a 2D Lattice  

Science Journals Connector (OSTI)

We investigate the structure of the spectrum of antiferromagnetically coupled spin-1 bosons on a square lattice using degenerate perturbation theory and exact diagonalizations of finite clusters. We show that the superfluid phase develops an Anderson tower of states typical of nematic long-range order with broken SU(2) symmetry. We further show that this order persists into the Mott-insulating phase down to zero hopping for one boson per site and down to a critical hopping for two bosons per site, in agreement with mean-field and quantum Monte Carlo results. The connection with the transition between a fragmented condensate and a polar one in a single trap is briefly discussed.

Laurent de Forges de Parny; Hongyu Yang; Frdric Mila

2014-11-12T23:59:59.000Z

379

Optimal heliostat aiming strategy for uniform distribution of heat flux on the receiver of a solar power tower plant  

Science Journals Connector (OSTI)

Abstract Temperature distribution on the receiver surface of a solar power tower plant is of great importance. High temperature gradients may lead to local hot spots and consequently failure of the receiver. The temperature distribution can be controlled by defining several aiming points on the receiver surface and adjusting the heliostats accordingly. In this paper, a new optimization algorithm which works based on the principles of genetic algorithm is developed to find the optimal flux distribution on the receiver surface. The objective is to minimize the standard deviation of the flux density distribution by changing the aiming points of individual heliostats. Flux distribution of each heliostat is found by using the HFLCAL model [1], which is validated against experimental data. The results show that after employing the new algorithm the maximum flux density is reduced by an order of magnitude. The effects of number of aiming points and size of the aiming surface on the flux density distribution are investigated in detail.

Saeb M. Besarati; D. Yogi Goswami; Elias K. Stefanakos

2014-01-01T23:59:59.000Z

380

Observations of the Pulsar PSR B1951+32 with the Solar Tower Atmospheric Cherenkov Effect Experiment  

E-Print Network [OSTI]

We present the analysis and results of 12.5 hours of high-energy gamma-ray observations of the EGRET-detected pulsar PSR B1951+32 using the Solar Tower Atmospheric Cherenkov Effect Experiment (STACEE). STACEE is an atmospheric Cherenkov detector, in Albuquerque, New Mexico, that detects cosmic gamma rays using the shower-front-sampling technique. STACEE's sensitivity to astrophysical sources at energies around 100 GeV allows it to investigate emission from gamma-ray pulsars with expected pulsed emission cutoffs below 100 GeV. We discuss the observations and analysis of STACEE's PSR 1951+32 data, accumulated during the 2005 and 2006 observing seasons.

J. Kildea; J. Zweerink; J. Ball; J. E. Carson; C. E. Covault; D. D. Driscoll; P. Fortin; D. M. Gingrich; D. S. Hanna; A. Jarvis; T. Lindner; C. Mueller; R. Mukherjee; R. A. Ong; K. Ragan; D. A. Williams

2007-10-25T23:59:59.000Z

Note: This page contains sample records for the topic "wolc radio tower" 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

Observations of the Pulsar PSR B1951+32 with the Solar Tower Atmospheric Cherenkov Effect Experiment  

E-Print Network [OSTI]

We present the analysis and results of 12.5 hours of high-energy gamma-ray observations of the EGRET-detected pulsar PSR B1951+32 using the Solar Tower Atmospheric Cherenkov Effect Experiment (STACEE). STACEE is an atmospheric Cherenkov detector, in Albuquerque, New Mexico, that detects cosmic gamma rays using the shower-front-sampling technique. STACEE's sensitivity to astrophysical sources at energies around 100 GeV allows it to investigate emission from gamma-ray pulsars with expected pulsed emission cutoffs below 100 GeV. We discuss the observations and analysis of STACEE's PSR 1951+32 data, accumulated during the 2005 and 2006 observing seasons.

Kildea, J; Ball, J; Carson, J E; Covault, C E; Driscoll, D D; Fortin, P; Gingrich, D M; Hanna, D S; Jarvis, A; Lindner, T; Mller, C; Mukherjee, R; Ong, R A; Ragan, K; Williams, D A

2007-01-01T23:59:59.000Z

382

Measurable energy savings of installing variable frequency drives for cooling towers fans, compared to dual speed motors  

Science Journals Connector (OSTI)

Abstract In recent years the building management system (BMS) controllers have been used to control the operation of heating, ventilation, and air conditioning system in addition to lighting and some electrical equipment in order to save energy. In the water cooled system, the BMS controls the operation process of the cooling towers (CTs) fans of dual speed motors to maintain a constant leaving water temperature for different cooling loads and different ambient wet bulb temperature (WBT). This paper presents the effect of installing variable frequency drives (VFDs) for \\{CTs\\} fans in Kuwait during summer season on energy savings compared to dual speed control. The results have shown that with VFD mode, the reduction in water consumption was over 13% compared to the commonly used dual speed mode. More importantly, the combined power for the chillers and the \\{CTs\\} fans for the same amount of cooling produced were reduced by 5.8% in the VFD mode.

E. Al-Bassam; R. Alasseri

2013-01-01T23:59:59.000Z

383

Stochastic Modeling of Carrier Sensing Based Cognitive Radio Networks Nguyen Tien Viet-Francois Baccelli  

E-Print Network [OSTI]

. Dynamic spectrum access aims at exploit- ing these voids to accommodate extra radio devices (re- ferred of licensed users (referred to as primary users). Cognitive radios [2],[21], or programmable radios are radio. Spectrum detection is one of the core problems in cognitive radio and is ad- dressed in [8],[15],[16] while

Paris-Sud XI, Université de

384

Solar radio bursts and acceleration of solar energy particles  

Science Journals Connector (OSTI)

The correlation between the proton flux intensity I p with the energies E p ...> 1?100 MeV and radio burst pa...

Yu. T. Tsap; E. A. Isaeva

2012-06-01T23:59:59.000Z

385

Priority Queuing Based Spectrum sensing Methodology in Cognitive Radio Network.  

E-Print Network [OSTI]

??Radio spectrum is becoming scarce resource due to increase in the usage of wireless communication devices. However studies have revealed that most of the allotted (more)

[emailprotected; /* */, Sajid

2011-01-01T23:59:59.000Z

386

TWO POPULATIONS OF GAMMA-RAY BURST RADIO AFTERGLOWS  

SciTech Connect (OSTI)

The detection rate of gamma-ray burst (GRB) afterglows is ?30% at radio wavelengths, much lower than in the X-ray (?95%) or optical (?70%) bands. The cause of this low radio detection rate has previously been attributed to limited observing sensitivity. We use visibility stacking to test this idea, and conclude that the low detection rate is instead due to two intrinsically different populations of GRBs: radio-bright and radio-faint. We calculate that no more than 70% of GRB afterglows are truly radio-bright, leaving a significant population of GRBs that lack a radio afterglow. These radio-bright GRBs have higher gamma-ray fluence, isotropic energies, X-ray fluxes, and optical fluxes than the radio-faint GRBs, thus confirming the existence of two physically distinct populations. We suggest that the gamma-ray efficiency of the prompt emission is responsible for the difference between the two populations. We also discuss the implications for future radio and optical surveys.

Hancock, P. J.; Gaensler, B. M.; Murphy, T., E-mail: Paul.Hancock@Sydney.edu.au [Also at Australian Research Council Centre of Excellence for All-sky Astrophysics (CAASTRO), The University of Sydney, Sydney, NSW 2006, Australia. (Australia)

2013-10-20T23:59:59.000Z

387

Solar Radio Burst Effects on Global Positioning System Receivers .  

E-Print Network [OSTI]

??This thesis presents a series of studies investigating solar radio burst effects on Global Positioning System (GPS) receivers along with supporting instrumentation and analysis techniques. (more)

Cerruti, Alessandro Paolo

2007-01-01T23:59:59.000Z

388

2006 Raj JainCSE574sWashington University in St. Louis Radio FrequencyRadio Frequency  

E-Print Network [OSTI]

18-1 ©2006 Raj JainCSE574sWashington University in St. Louis Radio FrequencyRadio Frequency;18-3 ©2006 Raj JainCSE574sWashington University in St. Louis What is RFID?What is RFID? ! Radio Frequency #. 96-bit block of read- only storage (ROM). " Read-write memory. " Tags may have embedded sensors (tire

Jain, Raj

389

Barrier Immune Radio Communications for Demand Response  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

94E 94E Barrier Immune Radio Communications for Demand Response F. Rubinstein, G. Ghatikar, J. Granderson, D. Watson Lawrence Berkeley National Laboratory P. Haugen, C. Romero Lawrence Livermore National Laboratory February 2009 DISCLAIMER This document was prepared as an account of work sponsored by the United States Government. While this document is believed to contain correct information, neither the United States Government nor any agency thereof, nor The Regents of the University of California, nor any of their employees, makes any warranty, express or implied, or assumes any legal responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe

390

Nomenclature of The Galactic Center Radio Sources  

E-Print Network [OSTI]

Since its identification as the Galactic Center, the radio source Sagittarius A has been a target of intense research. Due to the high density of sources in the Galactic Center and differing observing techniques, the nomenclature of sources in this region has changed over the years, with sources having several names, as well as the same names being used for different sources. We review this historical evolution in the context of current and previous scientific discussions, and outline how, why and when some of the commonly accepted names of Galactic Center sources were established.

Patrick Palmer; W. Miller Goss

1996-07-29T23:59:59.000Z

391

Cognitive Radio: A path in the Evolution of Public Wireless Networks The concept of cognitive radio has arisen as a generalization of the principle of multiple  

E-Print Network [OSTI]

Cognitive Radio: A path in the Evolution of Public Wireless Networks The concept of cognitive radio layer including fixed modulation and error control coding algorithms. The cognitive radio is supposed of the TV spectrum being opened up to new uses. From this standpoint we may view cognitive radio

Jafar, Syed A.

392

A Wavelet Approach to Wideband Spectrum Sensing for Cognitive Radios Department of Electrical & Computer Engineering  

E-Print Network [OSTI]

A Wavelet Approach to Wideband Spectrum Sensing for Cognitive Radios Zhi Tian Department. The proposed sensing techniques provide an effective radio sensing architecture to identify and locate spectrum static spectrum allocation, fixed radio functions, and limited network coordination between mobile

Tian, Zhi "Gerry"

393

On Spectrum Selection Games in Cognitive Radio Ilaria Malanchini, Matteo Cesana, Nicola Gatti  

E-Print Network [OSTI]

On Spectrum Selection Games in Cognitive Radio Networks Ilaria Malanchini, Matteo Cesana, Nicola to evalu- ate spectrum management functionalities in Cognitive Radio Net- works. The spectrum selection environment, consequently exploiting under-utilized spectrum portions. The motivation for cognitive radio

Gatti, Nicola

394

E-Print Network 3.0 - activation radio Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AND DATA RADIOS Jessica Feng Summary: , a number of data radios that have been in active listening mode. In general, this radio is power... POWER MINIMIZATION BY SEPARATION OF...

395

Curriculum Vitae Casey J. Law Radio Astronomy Lab  

E-Print Network [OSTI]

Curriculum Vitae ­ Casey J. Law Radio Astronomy Lab University of California Hearst Field Annex ­ B://astro.berkeley.edu/claw 1 Education Northwestern University, Ph.D., Astrophysics (2007) Boston University, M.A., Astronomy: Radio Astronomy Lab Postdoctoral Fellow at UC Berkeley. Worked with Geoff Bower, Don Backer, and Carl

Militzer, Burkhard

396

Discrimination between Jovian radio emissions and Saturn electrostatic discharges  

E-Print Network [OSTI]

vertical streaks in the dynamic spectrum of the Cassini/RPWS (Radio and Plasma Wave Science) receiver in the frequency range of a few MHz can be due to Jovian radio emissions or SEDs (Saturn electrostatic discharges caused by lightning in Saturn's atmosphere. We show a method for discriminating between these two

Gurnett, Donald A.

397

Radio Recombination Lines: A New Observational Tool in Astrophysics  

Science Journals Connector (OSTI)

...2.0.30Av/MHz Fig. 4. (a...not significantly larger than the noise...25" HPBW V(MHz) 18hhM 18hOOm...construction of large radio telescopes...The hatched area labeled HPBW is...the meantime both larger radio telescopes...present maps of an area of the galactic...

P. G. Mezger; Patrick Palmer

1968-04-05T23:59:59.000Z

398

Toward Secure Distributed Spectrum Sensing in Cognitive Radio Networks  

E-Print Network [OSTI]

1 Toward Secure Distributed Spectrum Sensing in Cognitive Radio Networks Ruiliang Chen, Jung}@vt.edu Abstract Cognitive radio (CR) is a revolutionary technology that promises to alleviate the spectrum shortage problem and to bring about remarkable improvement in spectrum utilization. Spectrum sensing is one

399

High Throughput Spectrumaware Routing for Cognitive Radio Networks  

E-Print Network [OSTI]

High Throughput Spectrum­aware Routing for Cognitive Radio Networks Ashwin Sampath, Lei Yang, Lili, wireless nodes equipped with cognitive radios [11] do not operate on statically as­ signed spectrum. Instead, they identify and use locally unused licensed spectrum while avoiding disruptions to legacy users

Zhao, Ben Y.

400

Cognitive Radio Networks: How much Spectrum Sharing is Optimal?  

E-Print Network [OSTI]

Cognitive Radio Networks: How much Spectrum Sharing is Optimal? Sudhir Srinivasa and Syed Ali Jafar the traditional `divide and set aside' approach to spectrum regulation ensures that the licensed (primary) users periodically monitors the radio spectrum, intelligently detects occupancy in the different frequency bands

Jafar, Syed A.

Note: This page contains sample records for the topic "wolc radio tower" 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

Robust Threshold Design for Cooperative Sensing in Cognitive Radio Networks  

E-Print Network [OSTI]

Wang, Jianwei Huang Abstract--The successful coexistence of cognitive radio sys- tems and licensed proposed algorithm. Index Terms--Cognitive radio, spectrum sensing, robust opti- mization, distribution uncertainty. I. Introduction Traditionally, wireless spectrum has been statically allocated to license holders

Huang, Jianwei

402

Avoiding Spectral Congestion: An Enhanced Cognitive Radio Approach Santosh Kawade  

E-Print Network [OSTI]

congestion by load sharing wireless traffic across different licensed spectrum bands. However, it is thought to increase the demand for radio spectrum by orders of magnitude over the next decade ...' `... there is a significant increase in the demand for wireless broadband data, rendering the radio spectrum more and more

Haddadi, Hamed

403

Signal Classification in Heterogeneous OFDM-based Cognitive Radio Systems  

E-Print Network [OSTI]

the spectrum awareness also called classification of various signals enabling the OFDM-based cognitive radio, also called secondary users (SUs). The SU tries to gain access to the licensed spectrum when the PU environment come from the spectrum sensing feature of the cognitive radio. The other main functions

Gesbert, David

404

Ensuring Trustworthy Spectrum Sensing in Cognitive Radio Networks  

E-Print Network [OSTI]

Ensuring Trustworthy Spectrum Sensing in Cognitive Radio Networks Ruiliang Chen and Jung-Min Park to coexist with incumbent users in licensed spectrum bands without inducing interference to incumbent--Cognitive Radio, Spectrum Sensing, Primary User Emulation Attack, Location Verification. I. INTRODUCTION The need

405

Envelope/phase delays correction in an EER radio architecture  

E-Print Network [OSTI]

Envelope/phase delays correction in an EER radio architecture Jean-François BERCHER and Corinne -- In this paper we consider the sensitivity of a transmitter based on EER radio architecture to time mismatches the interest of this approach. I. INTRODUCTION Envelope Elimination and restoration (EER) was developed by Kahn

Bercher, Jean-François

406

Intranight optical variability of radio-quiet BL Lacertae objects  

E-Print Network [OSTI]

Aims: The intranight variation (or microvariation) is a common phenomenon of radio-loud BL Lac objects. However, it is not clear whether the recently found radio-quiet BL Lac objects have the same properties. The occurrence rate of intranight variation is helpful in distinguishing the mechanism of the continuum of radio-quiet BL Lac objects. Methods: We conducted a photometric monitoring of 8 radio-quiet BL Lac objects by Xinglong 2.16m and Lijiang 2.4m telescopes. The differential light curves are calculated between each target and two comparison stars. To qualify the variation, the significance of variation is examined by scaled $F$-test. Results: No significant variation is found in the 11 sessions of light curves of 8 radio-quiet BL Lac objects (one galactic source is excluded). The lack of microvariation in radio-quiet BL Lac objects is consistent with the detection rate of microvariation in normal radio-quiet AGNs, but much lower than that of radio-loud AGNs. This result indicates that the continua of t...

Liu, Yuan; Zhang, Shuang Nan

2015-01-01T23:59:59.000Z

407

Violating privacy through walls by passive monitoring of radio windows  

Science Journals Connector (OSTI)

We investigate the ability of an attacker to passively use an otherwise secure wireless network to detect moving people through walls. We call this attack on privacy of people a "monitoring radio windows" (MRW) attack. We design and implement the MRW ... Keywords: line crossing, radio window, signal strength, wifi

Arijit Banerjee; Dustin Maas; Maurizio Bocca; Neal Patwari; Sneha Kasera

2014-07-01T23:59:59.000Z

408

Outage Probability Analysis for Asynchronous Cognitive Radio Networks  

E-Print Network [OSTI]

and the secondary network co-exist. Solid lines and dashed lines represent the data transmissionOutage Probability Analysis for Asynchronous Cognitive Radio Networks Chulhee Jang and Jae Hong Lee network in a spectrum sharing asynchronous cognitive radio (CR) network. We analyze the outage probability

Lee, Jae Hong

409

Spectrum usage models for the analysis, design and simulation of cognitive radio networks.  

E-Print Network [OSTI]

??The owned spectrum allocation policy, in use since the early days of modern radio communications, has been proven to effectively control interference among radio communication (more)

Lpez Bentez, Miguel

2011-01-01T23:59:59.000Z

410

E-Print Network 3.0 - assessing radio-isotope identification...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

radio-isotope identification Search Powered by Explorit Topic List Advanced Search Sample search results for: assessing radio-isotope identification Page: << < 1 2 3 4 5 > >> 1...

411

Underground radio technology saves miners and emergency response personnel  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Underground radio technology saves miners and emergency response Underground radio technology saves miners and emergency response personnel Underground radio technology saves miners and emergency response personnel Founded through LANL, Vital Alert Technologies, Inc. (Vital Alert) has launched a wireless, two-way real-time voice communication system that is effective through 1,000+ feet of solid rock. April 3, 2012 Vital Alert's C1000 mine and tunnel radios use magnetic induction, advanced digital communications techniques and ultra-low frequency transmission to wirelessly provide reliable 2-way voice, text, or data links through rock strata and other solid media. Vital Alert's C1000 mine and tunnel radios use magnetic induction, advanced digital communications techniques and ultra-low frequency transmission to wirelessly provide reliable 2-way voice, text, or data links through rock

412

The Gaseous Electronics Conference radio-frequency reference cell: A defined parallel-plate radio-frequency system for experimental  

E-Print Network [OSTI]

The Gaseous Electronics Conference radio-frequency reference cell: A defined parallel-plate radio-frequency publication 3 September1993) A "referencecell" for generatingradio-frequency(rf) glow dischargesin gasesat a frequencyof 13.56MHz is described.The referencecell provides an experimental platform for comparing plasma

Kushner, Mark

413

High-temperature Thermal Storage System for Solar Tower Power Plants with Open-volumetric Air Receiver Simulation and Energy Balancing of a Discretized Model  

Science Journals Connector (OSTI)

Abstract This paper describes the modeling of a high-temperature storage system for an existing solar tower power plant with open volumetric receiver technology, which uses air as heat transfer medium (HTF). The storage system model has been developed in the simulation environment Matlab/Simulink. The storage type under investigation is a packed bed thermal energy storage system which has the characteristics of a regenerator. Thermal energy can be stored and discharged as required via the HTF air. The air mass flow distribution is controlled by valves, and the mass flow by two blowers. The thermal storage operation strategy has a direct and significant impact on the energetic and economic efficiency of the solar tower power plants.

Valentina Kronhardt; Spiros Alexopoulos; Martin Reiel; Johannes Sattler; Bernhard Hoffschmidt; Matthias Hnel; Till Doerbeck

2014-01-01T23:59:59.000Z

414

REVISITING SCALING RELATIONS FOR GIANT RADIO HALOS IN GALAXY CLUSTERS  

SciTech Connect (OSTI)

Many galaxy clusters host megaparsec-scale radio halos, generated by ultrarelativistic electrons in the magnetized intracluster medium. Correlations between the synchrotron power of radio halos and the thermal properties of the hosting clusters were established in the last decade, including the connection between the presence of a halo and cluster mergers. The X-ray luminosity and redshift-limited Extended GMRT Radio Halo Survey provides a rich and unique dataset for statistical studies of the halos. We uniformly analyze the radio and X-ray data for the GMRT cluster sample, and use the new Planck Sunyaev-Zel'dovich (SZ) catalog to revisit the correlations between the power of radio halos and the thermal properties of galaxy clusters. We find that the radio power at 1.4 GHz scales with the cluster X-ray (0.1-2.4 keV) luminosity computed within R{sub 500} as P{sub 1.4}?L{sup 2.10.2}{sub 500}. Our bigger and more homogenous sample confirms that the X-ray luminous (L{sub 500} > 5 10{sup 44} erg s{sup 1}) clusters branch into two populationsradio halos lie on the correlation, while clusters without radio halos have their radio upper limits well below that correlation. This bimodality remains if we excise cool cores from the X-ray luminosities. We also find that P{sub 1.4} scales with the cluster integrated SZ signal within R{sub 500}, measured by Planck, as P{sub 1.4}?Y{sup 2.050.28}{sub 500}, in line with previous findings. However, contrary to previous studies that were limited by incompleteness and small sample size, we find that 'SZ-luminous' Y{sub 500} > 6 10{sup 5} Mpc{sup 2} clusters show a bimodal behavior for the presence of radio halos, similar to that in the radio-X-ray diagram. Bimodality of both correlations can be traced to clusters dynamics, with radio halos found exclusively in merging clusters. These results confirm the key role of mergers for the origin of giant radio halos, suggesting that they trigger the relativistic particle acceleration.

Cassano, R.; Brunetti, G.; Venturi, T.; Kale, R. [INAF/IRA, via Gobetti 101, I-40129 Bologna (Italy); Ettori, S. [INAF/Osservatorio Astronomico di Bologna, via Ranzani 1, I-40127 Bologna (Italy); Giacintucci, S. [Department of Astronomy, University of Maryland, College Park, MD 20742-2421 (United States); Pratt, G. W. [Laboratoire AIM, IRFU/Service dAstrophysique-CEA/DSM-CNRS-Universit Paris Diderot, Bt. 709, CEA-Saclay, F-91191 Gif-sur-Yvette Cedex (France); Dolag, K. [University Observatory Munich, Scheinerstr. 1, D-81679 Munich (Germany); Markevitch, M. [Astrophysics Science Division, NASA/Goddard Space Flight Center, Greenbelt, MD 20771 (United States)

2013-11-10T23:59:59.000Z

415

American Recovery and Reinvestment Act (ARRA) FEMP Technical Assistance Federal Aviation Administration Project 209 Control Tower and Support Building Oakland, CA  

SciTech Connect (OSTI)

This report represents findings of a design review team that evaluated construction documents (at the 70% level) and operating specifications for a new control tower and support building that will be build at Oakland, California by the Federal Aviation Administration (FAA). The focus of the review was to identify measures that could be incorporated into the final design and operating specification that would result in additional energy savings for the FAA that would not have otherwise occurred.

Arends, J.; Sandusky, William F.

2010-03-01T23:59:59.000Z

416

American Recovery and Reinvestment Act (ARRA) FEMP Technical Assistance Federal Aviation Administration Project 209 - Control Tower and Support Building, Las Vegas, NV  

SciTech Connect (OSTI)

This report represents findings of a design review team that evaluated construction documents (at the 70% level) and operating specifications for a new control tower and support building that will be built in Las Vegas, Nevada by the Federal Aviation Administration (FAA). The focus of the review was to identify measures that could be incorporated into the final design and operating specification that would result in additional energy savings for the FAA that would not have otherwise occurred.

Arends, J.; Sandusky, William F.

2010-03-31T23:59:59.000Z

417

An improved integrally formed radio frequency quadrupole  

DOE Patents [OSTI]

An improved radio frequency quadrupole is provided having an elongate housing with an elongate central axis and top, bottom and two side walls symmetrically disposed about the axis, and vanes formed integrally with the walls, the vanes each having a cross-section at right angles to the central axis which tapers inwardly toward the axis to form electrode tips spaced from each other by predetermined distances. Each of the four walls, and the vanes integral therewith, is a separate structural element having a central lengthwise plane passing through the tip of the vane, the walls having flat mounting surfaces at right angles to and parallel to the control plane, respectively, which are butted together to position the walls and vane tips relative to each other. 4 figs.

Abbott, S.R.

1987-10-05T23:59:59.000Z

418

High Energy Gamma-Ray Observations of the Crab Nebula and Pulsar with the Solar Tower Atmospheric Cherenkov Effect Experiment  

E-Print Network [OSTI]

The Solar Tower Atmospheric Cherenkov Effect Experiment (STACEE) is a new ground-based atmospheric Cherenkov telescope for gamma-ray astronomy. STACEE uses the large mirror area of a solar heliostat facility to achieve a low energy threshold. A prototype experiment which uses 32 heliostat mirrors with a total mirror area of ~ 1200\\unit{m^2} has been constructed. This prototype, called STACEE-32, was used to search for high energy gamma-ray emission from the Crab Nebula and Pulsar. Observations taken between November 1998 and February 1999 yield a strong statistical excess of gamma-like events from the Crab, with a significance of $+6.75\\sigma$ in 43 hours of on-source observing time. No evidence for pulsed emission from the Crab Pulsar was found, and the upper limit on the pulsed fraction of the observed excess was E_{th}) = (2.2 \\pm 0.6 \\pm 0.2) \\times 10^{-10}\\unit{photons cm^{-2} s^{-1}}. The observed flux is in agreement with a continuation to lower energies of the power law spectrum seen at TeV energies.

STACEE Collaboration; S. Oser; D. Bhattacharya; L. M. Boone; M. C. Chantell; Z. Conner; C. E. Covault; M. Dragovan; P. Fortin; D. T. Gregorich; D. S. Hanna; R. Mukherjee; R. A. Ong; K. Ragan; R. A. Scalzo; D. R. Schuette; C. G. Theoret; T. O. Tumer; D. A. Williams; J. A. Zweerink

2000-06-21T23:59:59.000Z

419

Microsoft Word - Anaconda-Sub-3G-CX.doc  

Broader source: Energy.gov (indexed) [DOE]

install a new monopole radio tower and associated communication upgrades at the existing BPA Anaconda Substation in Deer Lodge County, Montana. The monopole tower would be about...

420

Method and apparatus for radio frequency ceramic sintering  

DOE Patents [OSTI]

Radio frequency energy is used to sinter ceramic materials. A coaxial waveguide resonator produces a TEM mode wave which generates a high field capacitive region in which a sample of the ceramic material is located. Frequency of the power source is kept in the range of radio frequency, and preferably between 60-80 MHz. An alternative embodiment provides a tunable radio frequency circuit which includes a series input capacitor and a parallel capacitor, with the sintered ceramic connected by an inductive lead. This arrangement permits matching of impedance over a wide range of dielectric constants, ceramic volumes, and loss tangents. 6 figures.

Hoffman, D.J.; Kimrey, H.D. Jr.

1993-11-30T23:59:59.000Z

Note: This page contains sample records for the topic "wolc radio tower" 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

Method and apparatus for radio frequency ceramic sintering  

DOE Patents [OSTI]

Radio frequency energy is used to sinter ceramic materials. A coaxial waveguide resonator produces a TEM mode wave which generates a high field capacitive region in which a sample of the ceramic material is located. Frequency of the power source is kept in the range of radio frequency, and preferably between 60-80 MHz. An alternative embodiment provides a tunable radio frequency circuit which includes a series input capacitor and a parallel capacitor, with the sintered ceramic connected by an inductive lead. This arrangement permits matching of impedance over a wide range of dielectric constants, ceramic volumes, and loss tangents.

Hoffman, Daniel J. (Oak Ridge, TN); Kimrey, Jr., Harold D. (Knoxville, TN)

1993-01-01T23:59:59.000Z

422

Radio emission from Colliding-Wind Binaries: Observations and Models  

E-Print Network [OSTI]

We have developed radiative transfer models of the radio emission from colliding-wind binaries (CWB) based on a hydrodynamical treatment of the wind-collision region (WCR). The archetype of CWB systems is the 7.9-yr period binary WR140, which exhibits dramatic variations at radio wavelengths. High-resolution radio observations of WR140 permit a determination of several system parameters, particularly orbit inclination and distance, that are essential for any models of this system. A model fit to data at orbital phase 0.9 is shown, and some short comings of our model described.

S. M. Dougherty; J. M. Pittard; E. P. O'Connor

2005-10-18T23:59:59.000Z

423

High-power radio-frequency attenuation device  

DOE Patents [OSTI]

A resistor device for attenuating radio frequency power includes a radio frequency conductor connected to a series of fins formed of high relative magnetic permeability material. The fins are dimensional to accommodate the skin depth of the current conduction therethrough, as well as an inner heat conducting portion where current does not travel. Thermal connections for air or water cooling are provided for the inner heat conducting portions of each fin. Also disclosed is a resistor device to selectively alternate unwanted radio frequency energy in a resonant cavity.

Kerns, Q.A.; Miller, H.W.

1981-12-30T23:59:59.000Z

424

Spectrum Occupancy Analysis for Cognitive Radio Zhe Wang and Sana Salous  

E-Print Network [OSTI]

Spectrum Occupancy Analysis for Cognitive Radio Zhe Wang and Sana Salous School of Engineering frequency strategy has not been able to optimise the spectrum usage. Cognitive Radio could in theory allow spectrum to operate in. Cognitive Radio would hop into unused bands of the radio spectrum and hop out again

Haddadi, Hamed

425

Cooperative Spectrum Sensing and Localiza-tion in Cognitive Radio Systems using Com-  

E-Print Network [OSTI]

Cooperative Spectrum Sensing and Localiza- tion in Cognitive Radio Systems using Com- pressed features in cog- nitive radio systems (CRS): spectrum sensing and location awareness in a single compressed implementing a cognitive radio system. The major problem for spectrum sensing arises in wideband radio, when

Gesbert, David

426

A Game Theoretic Approach for Medium Access of Open Spectrum in Cognitive Radios  

E-Print Network [OSTI]

A Game Theoretic Approach for Medium Access of Open Spectrum in Cognitive Radios Madhusudhan R broadcast [2]. The U.S. DARPA Next Generation Com- open spectrum for spectrum agile radios that use spectrum radios. Spectrum funding Program (FP6) of the European Union are working agile radios operate in parts

Chronopoulos, Anthony T.

427

Capacity Limits of Cognitive Radio with Distributed and Dynamic Spectral Activity  

E-Print Network [OSTI]

Cognitive radio technology has tremendous potential for improving the utilization of radio spectrum. Derived that are licensed to their primary users [2]. It is driven by software defined radio technology whichCapacity Limits of Cognitive Radio with Distributed and Dynamic Spectral Activity Syed Ali Jafar

Jafar, Syed A.

428

Lawrence Livermore National Laboratory (LLNL) Experimental Test Site (Site 300) Salinity Evaluation and Minimization Plan for Cooling Towers and Mechanical Equipment Discharges  

SciTech Connect (OSTI)

This document was created to comply with the Central Valley Regional Water Quality Control Board (CVRWQCB) Waste Discharge Requirement (Order No. 98-148). This order established new requirements to assess the effect of and effort required to reduce salts in process water discharged to the subsurface. This includes the review of technical, operational, and management options available to reduce total dissolved solids (TDS) concentrations in cooling tower and mechanical equipment water discharges at Lawrence Livermore National Laboratory's (LLNL's) Experimental Test Site (Site 300) facility. It was observed that for the six cooling towers currently in operation, the total volume of groundwater used as make up water is about 27 gallons per minute and the discharge to the subsurface via percolation pits is 13 gallons per minute. The extracted groundwater has a TDS concentration of 700 mg/L. The cooling tower discharge concentrations range from 700 to 1,400 mg/L. There is also a small volume of mechanical equipment effluent being discharged to percolation pits, with a TDS range from 400 to 3,300 mg/L. The cooling towers and mechanical equipment are maintained and operated in a satisfactory manner. No major leaks were identified. Currently, there are no re-use options being employed. Several approaches known to reduce the blow down flow rate and/or TDS concentration being discharged to the percolation pits and septic systems were reviewed for technical feasibility and cost efficiency. These options range from efforts as simple as eliminating leaks to implementing advanced and innovative treatment methods. The various options considered, and their anticipated effect on water consumption, discharge volumes, and reduced concentrations are listed and compared in this report. Based on the assessment, it was recommended that there is enough variability in equipment usage, chemistry, flow rate, and discharge configurations that each discharge location at Site 300 should be considered separately when deciding on an approach for reducing the salt discharge to the subsurface. The smaller units may justify moderate changes to equipment, and may benefit from increased cleaning frequencies, more accurate and suitable chemical treatment, and sources of make up water and discharge re-use. The larger cooling towers would be more suitable for automated systems where they don't already exist, re-circulation and treatment of blow down water, and enhanced chemical dosing strategies. It may be more technically feasible and cost efficient for the smaller cooling towers to be replaced by closed loop dry coolers or hybrid towers. There are several potential steps that could be taken at each location to reduce the TDS concentration and/or water use. These include: sump water filtration, minimization of drift, accurate chemical dosing, and use of scale and corrosion coupons for chemical calibration. The implementation of some of these options could be achieved by a step-wise approach taken at two representative facilities. Once viable prototype systems have been proven in the field, systematic implementation should proceed for the remaining systems, with cost, desired reduction, and general feasibility taken into consideration for such systems.

Daily III, W D

2010-02-24T23:59:59.000Z

429

Press Room - Radio - U.S. Energy Information Administration (EIA)  

U.S. Energy Information Administration (EIA) Indexed Site

Press Room Press Room Glossary › FAQS › Overview Press Releases Testimony Presentations Radio Events Radio Spots Ready-to-broadcast news stories. Transcripts provided so radio spots can be re-recorded in whole or in part. Residential heating oil prices virtually unchanged mp3 Date: December 18, 2013 Description: The average retail price for home heating oil fell 4-tenths of a penny from a week ago to $3.95 per gallon. That's down 8-tenths of a penny from a year ago, based on the residential heating fuel survey by the U.S. Energy Information Administration. Heating oil prices in the New England region rose 3.92 per gallon, up 3-tenths of a cent from last week, and up 3 cents from a year ago. Contact/Author: Amerine Woodyard, 202-586-1256 Transcript: http://www.eia.gov/radio/transcript/heating_oil_prices_12182013.pdf

430

The angular power spectrum of NVSS radio galaxies  

E-Print Network [OSTI]

We measure the angular power spectrum of radio galaxies in the NRAO VLA Sky Survey (NVSS) using two independent methods: direct spherical harmonic analysis and maximum likelihood estimation. The results are consistent and can be understood using models for the spatial matter power spectrum and for the redshift distribution of radio galaxies at mJy flux-density levels. A good fit to the angular power spectrum can only be achieved if radio galaxies possess high bias with respect to mass fluctuations; by marginalizing over the other parameters of the model we derive a 68% confidence interval 1.53 radio galaxies and sigma_8 describes the normalization of the matter power spectrum. Our models indicate that the majority of the signal in the NVSS angular power spectrum is generated at low redshifts. Individual redshifts for the NVSS sources are thus required to alleviate projection effects and probe directly the matter power spectrum on large scales.

Chris Blake; Pedro G. Ferreira; Julian Borrill

2004-04-05T23:59:59.000Z

431

Spectrum Management for Cognitive Radio based on Genetics Algorithm  

E-Print Network [OSTI]

Spectrum scarceness is one of the major challenges that the present world is facing. The efficient use of existing licensed spectrum is becoming most critical as growing demand of the radio spectrum. Different researches show that the use of licensed are not utilized inefficiently. It has been also shown that primary user does not use more than 70% of the licensed frequency band most of the time. Many researchers are trying to found the techniques that efficiently utilize the under-utilized licensed spectrum. One of the approaches is the use of "Cognitive Radio". This allows the radio to learn from its environment, changing certain parameters. Based on this knowledge the radio can dynamically exploit the spectrum holes in the licensed band of the spectrum. This paper w i l l focus on the performance of spectrum allocation technique, based on popular meta-heuristics Genetics Algorithm and analyzing the performance of this technique using Mat Lab.

Singh, Santosh Kumar; Pathak, Vibhakar; Roy, Dr Krishna Chandra

2011-01-01T23:59:59.000Z

432

A Sensing Error Aware MAC Protocol for Cognitive Radio Networks  

E-Print Network [OSTI]

Cognitive radios (CR) are intelligent radio devices that can sense the radio environment and adapt to changes in the radio environment. Spectrum sensing and spectrum access are the two key CR functions. In this paper, we present a spectrum sensing error aware MAC protocol for a CR network collocated with multiple primary networks. We explicitly consider both types of sensing errors in the CR MAC design, since such errors are inevitable for practical spectrum sensors and more important, such errors could have significant impact on the performance of the CR MAC protocol. Two spectrum sensing polices are presented, with which secondary users collaboratively sense the licensed channels. The sensing policies are then incorporated into p-Persistent CSMA to coordinate opportunistic spectrum access for CR network users. We present an analysis of the interference and throughput performance of the proposed CR MAC, and find the analysis highly accurate in our simulation studies. The proposed sensing error aware CR MAC p...

Hu, Donglin

2011-01-01T23:59:59.000Z

433

A relativistic model of the radio jets in NGC 315  

Science Journals Connector (OSTI)

......Dyer K. K., eds, X-Ray and Radio Connections. NRAO, Charlottesvillehttp://www.aoc.nrao.edu/events/xraydio ( http://www.aoc.nrao.edu/events/xraydio ). Donato D. , Sambruna R. M., Gliozzi M., 2004, ApJ......

J. R. Canvin; R. A. Laing; A. H. Bridle; W. D. Cotton

2005-11-11T23:59:59.000Z

434

New design of a radio-frequency plasma torch  

Science Journals Connector (OSTI)

A numerical model has been developed for predicting the two-dimensional flow and temperature fields in a radio-frequency (rf) plasma torch. The method employed here is based ... rates without interfering with the...

Toyonobu Yoshida; Kunihiko Nakagawa

1981-03-01T23:59:59.000Z

435

Radio-frequency-excited carbon dioxide metal waveguide laser  

Science Journals Connector (OSTI)

A new type of waveguide laser is described in which a single-surface concave metal waveguide also doubles as the grounded electrode in a radio-frequency-excited gaseous discharge. The...

Grossman, Jonathan G; Casperson, Lee W; Stafsudd, Oscar M

1983-01-01T23:59:59.000Z

436

COSMIC GPS Radio Occultation Temperature Profiles in Clouds  

Science Journals Connector (OSTI)

Thermodynamic states in clouds are closely related to physical processes such as phase changes of water and longwave and shortwave radiation. Global Positioning System (GPS) radio occultation (RO) data are not affected by clouds and have high ...

L. Lin; X. Zou; R. Anthes; Y-H. Kuo

2010-04-01T23:59:59.000Z

437

Radio-loud high-redshift protogalaxy candidates in Bootes  

E-Print Network [OSTI]

We used the Near Infrared Camera on Keck I to obtain Ks-band images of four candidate high-redshift radio galaxies selected using optical and radio data in the NOAO Deep Wide-Field Survey in Bootes. Our targets have 1.4 GHz radio flux densities greater than 1 mJy, but are undetected in the optical to fainter than 24 Vega mag. Spectral energy distribution fitting suggests that three of these objects are at z > 3, with radio luminosities near the FR-I / FR-II break. The other has photometric redshift 1.2, but may in fact be at higher redshift. Two of the four objects exhibit diffuse morphologies in Ks -band, suggesting that they are still in the process of forming.

Steve Croft; Wil van Breugel; Michael J. I. Brown; Wim de Vries; Arjun Dey; Peter Eisenhardt; Buell Jannuzi; Huub Rttgering; S. A. Stanford; Daniel Stern; S. P. Willner

2008-03-04T23:59:59.000Z

438

Radio frequency identification enabled wireless sensing for intelligent food logistics  

Science Journals Connector (OSTI)

...Hoekstra, Bastien Chopard and Peter Coveney Radio frequency identification enabled wireless sensing for intelligent food logistics Zhuo Zou Qiang Chen Ismail Uysal Lirong Zheng Phil. Trans. R. Soc. A 372, 20130313 (13 June 2014; Published online...

2014-01-01T23:59:59.000Z

439

National Radio Astronomy Observatory Green Bank Science Center  

E-Print Network [OSTI]

:Thanksgiving Day, Friday after Thanksgiving, Christmas Eve, Christmas Day, New Years Eve, New Years Day, and Easter that makes it difficult to do radio astronomy. Find out more! Find out how bad light pollution is in your

Groppi, Christopher

440

The spectral structure and energetics of powerful radio sources  

E-Print Network [OSTI]

Determining the energy spectrum of an electron population can give key insights into the underlying physics of a radio source; however, the lack of high resolution, broad-bandwidth observations has left many ambiguities in our understanding of radio galaxies. The improved capabilities of telescopes such as the JVLA and LOFAR mean that within the bandwidth of any given observation, a detailed spectral shape can now be produced. We present recent investigations of powerful FR-II radio galaxies at GHz and MHz frequencies and show for the first time their small-scale spectral structure. We highlight problems in traditional methods of analysis and demonstrate how these issues can now be addressed. We present the latest results from low frequency studies which suggest a potential increase in the total energy content of radio galaxy lobes with possible implications for the energetics of the population as a whole.

Harwood, J J; Croston, J H; Stroe, A; Morganti, R; Orru, E

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "wolc radio tower" 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

Extensive Air Shower Radio Detection Recent Results and Outlook  

E-Print Network [OSTI]

A prototype system for detecting radio pulses associated with extensive cosmic ray air showers is described. Sensitivity is compared with that in previous experiments, and lessons are noted for future studies.

Rosner, Jonathan L; Rosner, Jonathan L.; Suprun, Denis A.

2001-01-01T23:59:59.000Z

442

Extensive Air Shower Radio Detection: Recent Results and Outlook  

E-Print Network [OSTI]

A prototype system for detecting radio pulses associated with extensive cosmic ray air showers is described. Sensitivity is compared with that in previous experiments, and lessons are noted for future studies.

Jonathan L. Rosner; Denis A. Suprun

2003-04-14T23:59:59.000Z

443

Enhancing the energy efficiency of radio base stations  

E-Print Network [OSTI]

This thesis is concerned with the energy efficiency of cellular networks. It studies the dominant power consumer in future cellular networks, the Long Term Evolution (LTE) radio Base Station (BS), and proposes mechanisms ...

Holtkamp, Hauke Andreas

2014-06-30T23:59:59.000Z

444

Special Presentation: Key Findings from the Barrier Immune Radio  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Special Presentation: Key Findings from the Barrier Immune Radio Special Presentation: Key Findings from the Barrier Immune Radio Communications Project Speaker(s): Francis Rubinstein Girish Ghatikar Peter Haugen Date: November 29, 2007 - 12:00pm Location: 90-3122 The Barrier Immune Radio Communications (BIRC) Project was established in January 2007 by the Demand Response Emerging Technologies Program (DRETD) to identify radio frequency technologies that could enable the widespread deployment of Demand Response strategies in buildings. Researchers from Lawrence Berkeley National Laboratory and Lawrence Livermore National Laboratory will present the key findings from this project in a one-hour presentation. Researchers found that several of the RF technologies tested at LBNL's Molecular Foundry building were able to provide sufficiently

445

MEASURING THE JET POWER OF FLAT-SPECTRUM RADIO QUASARS  

SciTech Connect (OSTI)

We use frequency-dependent position shifts of flat-spectrum radio cores to estimate the kinetic power of active galactic nucleus (AGN) jets. We find a correlation between the derived jet powers and AGN narrow-line luminosity, consistent with the well-known relation for radio galaxies and steep spectrum quasars. This technique can be applied to intrinsically weak jets even at high redshift.

Shabala, S. S.; Santoso, J. S. [School of Mathematics and Physics, University of Tasmania, Private Bag 37, Hobart, TAS 7001 (Australia); Godfrey, L. E. H. [International Centre for Radio Astronomy Research, Curtin University, GPO Box U1987, Perth, Western Australia 6845 (Australia)

2012-09-10T23:59:59.000Z

446

INFRARED SPECTROSCOPY OF NEARBY RADIO ACTIVE ELLIPTICAL GALAXIES  

SciTech Connect (OSTI)

In preparation for a study of their circumnuclear gas we have surveyed 60% of a complete sample of elliptical galaxies within 75 Mpc that are radio sources. Some 20% of our nuclear spectra have infrared emission lines, mostly Paschen lines, Brackett {gamma}, and [Fe II]. We consider the influence of radio power and black hole mass in relation to the spectra. Access to the spectra is provided here as a community resource.

Mould, Jeremy [Centre for Astrophysics and Supercomputing Swinburne University, Hawthorn, Vic 3122 (Australia); Reynolds, Tristan [School of Physics, University of Melbourne, Melbourne, Vic 3100 (Australia); Readhead, Tony; Matthews, Keith [Palomar Observatory, California Institute of Technology 249-17, Pasadena, CA 91125 (United States); Floyd, David; Brown, Michael [School of Physics, Monash University, Clayton, Vic 3800 (Australia); Jannuzi, Buell; Atlee, David [Steward Observatory, University of Arizona (formerly at NOAO), Tucson, AZ 85719 (United States); Cotter, Garret [Department of Physics, University of Oxford, Denys, Oxford, Keble Road, OX13RH (United Kingdom); Ferrarese, Laura, E-mail: jmould@swin.edu.au [Herzberg Institute of Astrophysics Herzberg, Saanich Road, Victoria V8X4M6 (Canada)

2012-11-15T23:59:59.000Z

447

Radio frequency ion source operated with field effect transistor based radio frequency system  

SciTech Connect (OSTI)

Characteristics of radio frequency (RF) plasma production are investigated using a field effect transistor inverter power supply as an RF wave source. With the frequency of around 0.3 MHz, an electron density over 10{sup 18} m{sup -3} is produced in argon plasma. Although lower densities are obtained in hydrogen plasma, it drastically increased up to 5x10{sup 18} m{sup -3} with an axial magnetic field of around 100 G applied in the driver region. Effects of the magnetic field and gas pressure are investigated in the RF produced plasma with the frequency of several hundred kilohertz.

Ando, A.; Komuro, A.; Matsuno, T. [Department of Electrical Engineering, Tohoku University, Sendai 980-8759 (Japan); Tsumori, K.; Takeiri, Y. [National Institute for Fusion Science, Toki 509-5292 (Japan)

2010-02-15T23:59:59.000Z

448

KTFC Midwest Bible Radio Wind Farm | Open Energy Information  

Open Energy Info (EERE)

KTFC Midwest Bible Radio Wind Farm KTFC Midwest Bible Radio Wind Farm Jump to: navigation, search Name KTFC Midwest Bible Radio Wind Farm Facility KTFC Midwest Bible Radio Sector Wind energy Facility Type Small Scale Wind Facility Status In Service Owner KTFC Midwest Bible Radio Energy Purchaser KTFC Midwest Bible Radio Location IA Coordinates 42.4837°, -96.3068° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":42.4837,"lon":-96.3068,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

449

Deep ATLAS radio observations of the CDFS-SWIRE field  

E-Print Network [OSTI]

We present the first results from the Australia Telescope Large Area Survey (ATLAS), which consist of deep radio observations of a 3.7 square degree field surrounding the Chandra Deep Field South, largely coincident with the infrared Spitzer Wide-Area Extragalactic (SWIRE) Survey. We also list cross-identifications to infrared and optical photometry data from SWIRE, and ground-based optical spectroscopy. A total of 784 radio components are identified, corresponding to 726 distinct radio sources, nearly all of which are identified with SWIRE sources. Of the radio sources with measured redshifts, most lie in the redshift range 0.5-2, and include both star-forming galaxies and active galactic nuclei (AGN). We identify a rare population of infrared-faint radio sources which are bright at radio wavelengths but are not seen in the available optical, infrared, or X-ray data. Such rare classes of sources can only be discovered in wide, deep surveys such as this.

Ray P. Norris; Jose Afonso; Phil N. Appleton; Brian J. Boyle; Paolo Ciliegi; Scott M. Croom; Minh T. Huynh; Carole A. Jackson; Anton M. Koekemoer; Carol J. Lonsdale; Enno Middelberg; Bahram Mobasher; Seb J. Oliver; Mari Polletta; Brian D. Siana; Ian Smail; Maxim A. Voronkov

2006-10-18T23:59:59.000Z

450

The diffuse radio emission around NGC 5580 and NGC 5588  

E-Print Network [OSTI]

The galaxy pair NGC 5580 and NGC 5588 are part of a loose group of galaxies. They are surrounded by steep-spectrum, extended radio emission which was previously suggested to be a down-scaled example of Mpc-size radio haloes present in galaxies clusters. We present a multi-frequency study of the radio-emission aimed to clarify its nature. The source has been observed with the Giant Meterwave Radio Telescope at 235, 325 and 610 MHz and the images obtained were combined with archival data to cover the frequency range 150-1400 MHz. The new observations revealed the presence of a second, fainter lobe on the South-East of NGC 5580. The spectral index study of the source shows a flattening of the spectrum (which implies a younger particle population) close to the two galaxies. We argue that the extended radio emission is the remnant of a past activity cycle of the active galactic nucleus present in NGC 5580 and therefore a notable example of a dying radio galaxy located outside a dense environments.

de Gasperin, F; Williams, W; Brggen, M; Murgia, M; Beck, R; Bonafede, A

2014-01-01T23:59:59.000Z

451

Testing Relativistic Gravity with Radio Pulsars  

E-Print Network [OSTI]

Before the 1970s, precision tests for gravity theories were constrained to the weak gravitational fields of the Solar system. Hence, only the weak-field slow-motion aspects of relativistic celestial mechanics could be investigated. Testing gravity beyond the first post-Newtonian contributions was for a long time out of reach. The discovery of the first binary pulsar by Russell Hulse and Joseph Taylor in the summer of 1974 initiated a completely new field for testing the relativistic dynamics of gravitationally interacting bodies. For the first time the back reaction of gravitational wave emission on the binary motion could be studied. Furthermore, the Hulse-Taylor pulsar provided the first test bed for the orbital dynamics of strongly self-gravitating bodies. To date there are a number of pulsars known, which can be utilized for precision test of gravity. Depending on their orbital properties and their companion, these pulsars provide tests for various different aspects of relativistic dynamics. Besides tests of specific gravity theories, like general relativity or scalar-tensor gravity, there are pulsars that allow for generic constraints on potential deviations of gravity from general relativity in the quasi-stationary strong-field and the radiative regime. This article presents a brief overview of this modern field of relativistic celestial mechanics, reviews some of the highlights of gravity tests with radio pulsars, and discusses their implications for gravitational physics and astronomy, including the upcoming gravitational wave astronomy.

Norbert Wex

2014-02-23T23:59:59.000Z

452

Trirotron: triode rotating beam radio frequency amplifier  

DOE Patents [OSTI]

High efficiency amplification of radio frequencies to very high power levels including: establishing a cylindrical cloud of electrons; establishing an electrical field surrounding and coaxial with the electron cloud to bias the electrons to remain in the cloud; establishing a rotating electrical field that surrounds and is coaxial with the steady field, the circular path of the rotating field being one wavelength long, whereby the peak of one phase of the rotating field is used to accelerate electrons in a beam through the bias field in synchronism with the peak of the rotating field so that there is a beam of electrons continuously extracted from the cloud and rotating with the peak; establishing a steady electrical field that surrounds and is coaxial with the rotating field for high-energy radial acceleration of the rotating beam of electrons; and resonating the rotating beam of electrons within a space surrounding the second field, the space being selected to have a phase velocity equal to that of the rotating field to thereby produce a high-power output at the frequency of the rotating field.

Lebacqz, Jean V. (Stanford, CA)

1980-01-01T23:59:59.000Z

453

Radio and near-infrared observations of the steep spectrum Galactic plane radio source WKB 0314+57.8  

E-Print Network [OSTI]

Radio and near-infared observations towards the steep spectrum Galactic plane radio source WKB 0314+57.8 are presented, in order to clarify the nature of this source. The radio observations include archival and survey data, together with new Giant Metrewave Radio Telescope observations at 617 MHz. The near-infrared observations are in the J and K bands, from the Gemini instrument on the Shane 3-m telescope. The radio observations show that WKB 0314+57.8 is extended, with an very steep spectrum (with flux density proportional to frequency to -2.5 power between 40 MHz and 1.5 GHz). The colour--magnitude diagram constructed from near-infrared observations of the field suggests the presence of a z approx 0.08 galaxy cluster behind the Galactic plane, reddened by about 6 magnitudes of visual extinction. Although the steep spectrum source has no obvious identification, two other radio sources in the field covered by the near-infrared observations have tentative identifications with galaxies. These observations indicate that WKB 0314+57.8 is a relic source in a cluster of galaxies, not a pulsar.

D. A. Green; M. Lacy; S. Bhatnagar; E. L. Gates; P. J. Warner

2004-08-06T23:59:59.000Z

454

Optical and Near-IR Imaging of Ultra Steep Spectrum Radio Sources - The K-z diagram of radio and optically selected galaxies  

E-Print Network [OSTI]

We present optical and/or near-IR images of 128 ultra steep spectrum (USS) radio sources. Roughly half of the objects are identified in the optical images (R 94% are detected at K5). The major axes of the identifications in K-band are preferentially oriented along the radio axes, with half of them having compact morphologies. The 22 sources with spectroscopic redshifts and K-band magnitudes follow the K-z relation found from previous radio samples, but with a larger scatter. We argue that this may be due to a dependence of K-magnitude on the radio power, with the highest radio power sources inhabiting the most massive host galaxies. We present a composite K-z diagram of radio-loud and radio-quiet galaxies, selected from the HDF-North and the Hawaii surveys. Out to z radio-loud galaxies trace the bright envelope of the radio quiet galaxies, while at z >~ 1, the radio-loud galaxies are >~ 2 magnitudes brighter. We argue that this is not due to a contribution from the AGN or emission lines. This difference strongly suggests that radio galaxies pinpoint the most massive systems out to the highest known redshifts, probably due to the mutual correlation of the mass of the galaxy and the radio power on the mass of the central black hole.

Carlos De Breuck; Wil van Breugel; Adam Stanford; Huub Rottgering; George Miley; Daniel Stern

2001-09-28T23:59:59.000Z

455

RECOILING SUPERMASSIVE BLACK HOLES IN SPIN-FLIP RADIO GALAXIES  

SciTech Connect (OSTI)

Numerical relativity simulations predict that coalescence of supermassive black hole (SMBH) binaries leads not only to a spin flip but also to a recoiling of the merger remnant SMBHs. In the literature, X-shaped radio sources are popularly suggested to be candidates for SMBH mergers with spin flip of jet-ejecting SMBHs. Here we investigate the spectral and spatial observational signatures of the recoiling SMBHs in radio sources undergoing black hole spin flip. Our results show that SMBHs in most spin-flip radio sources have mass ratio q {approx}> 0.3 with a minimum possible value q{sub min} {approx_equal} 0.05. For major mergers, the remnant SMBHs can get a kick velocity as high as 2100 km s{sup -1} in the direction within an angle {approx}< 40 Degree-Sign relative to the spin axes of remnant SMBHs, implying that recoiling quasars are biased to be with high Doppler-shifted broad emission lines while recoiling radio galaxies are biased to large apparent spatial off-center displacements. We also calculate the distribution functions of line-of-sight velocity and apparent spatial off-center displacements for spin-flip radio sources with different apparent jet reorientation angles. Our results show that the larger the apparent jet reorientation angle is, the larger the Doppler-shifting recoiling velocity and apparent spatial off-center displacement will be. We investigate the effects of recoiling velocity on the dust torus in spin-flip radio sources and suggest that recoiling of SMBHs would lead to 'dust-poor' active galactic nuclei. Finally, we collect a sample of 19 X-shaped radio objects and for each object give the probability of detecting the predicted signatures of recoiling SMBH.

Liu, F. K.; Wang Dong [Department of Astronomy, Peking University, 100871 Beijing (China); Chen Xian, E-mail: fkliu@pku.edu.cn [Kavli Institute for Astronomy and Astrophysics, Peking University, 100871 Beijing (China)

2012-02-20T23:59:59.000Z

456

American Recovery and Reinvestment Act (ARRA) FEMP Technical Assistance Federal Aviation Administration Project 209 Control Tower and Support Building, Reno, Nevada  

SciTech Connect (OSTI)

Pacific Northwest National Laboratory (PNNL) and Redhorse Corporation (Redhorse) conducted an energy audit on the Federal Aviation Administration (FAA) control tower and base building in Reno, Nevada. This report presents the findings of the energy audit team that evaluated construction documents and operating specifications (at the 100% level) and completed a site visit. The focus of the review was to identify measures that could be incorporated into the final design and operating specifications that would result in additional energy savings for the FAA that would not have otherwise occurred.

Arends, J.; Sandusky, William F.

2010-06-30T23:59:59.000Z

457

Radio Sources in Low-Luminosity Active Galactic Nuclei.IV. Radio Luminosity Function, Importance of Jet Power, and Radio Properties of the Complete Palomar Sample  

E-Print Network [OSTI]

We present the completed results of a high resolution radio imaging survey of all (~200) low-luminosity active galactic nuclei (LLAGNs) and AGNs in the Palomar Spectroscopic Sample. The high incidences of pc-scale radio nuclei, with T(brightness) >=10^7 K, and sub-parsec jets argue for accreting black holes in >=50% of all LINERs and low-luminosity Seyferts; there is no evidence against all LLAGNs being mini-AGNs. The radio luminosity function (RLF) of Palomar Sample LLAGNs and AGNs extends three orders of magnitude below, and is continuous with, that of `classical' AGNs. We find marginal evidence for a low-power turnover in the RLF; nevertheless LLAGNs are responsible for a significant fraction of present day mass accretion. Adopting the jet model of Falcke & Biermann, we show that the accretion energy output in LLAGNs is dominated by the energy in the observed jets rather than the radiated bolometric luminosity. The Palomar LLAGNs and AGNs follow the same scaling between jet power and narrow line region (NLR) luminosity as the pc to kpc jets in powerful radio galaxies. Eddington ratios of <= 10^{-1} - 10^{-5} are implied in jet models of the radio emission. We find evidence that, in analogy to Galactic black hole candidates, LINERs are in a `low/hard' state (gas poor nuclei, low Eddington ratio, ability to launch collimated jets) while low-luminosity Seyferts are in a `high' state (gas rich nuclei, higher Eddington ratio, less likely to launch collimated jets). The jets are energetically more significant than supernovae in the LLAGN host galaxies, and are potentially able to deposit sufficient energy into the innermost parsecs to significantly slow the gas supply to the accretion disk.

Neil M. Nagar; Heino Falcke; Andrew S. Wilson

2005-02-25T23:59:59.000Z

458

RASDR: Benchtop Demonstration of SDR for Radio Astronomy  

SciTech Connect (OSTI)

The Society of Amateur Radio Astronomers (SARA) members present the benchtop version of RASDR, a Software Defined Radio (SDR) that is optimized for Radio Astronomy. RASDR has the potential to be a common digital receiver interface useful to many SARA members. This document describes the RASDR 0.0 , which provides digitized radio data to a backend computer through a USB 2.0 interface. A primary component of RASDR is the Lime Microsystems Femtocell chip which tunes from a 0.4-4 GHz center frequency with several selectable bandwidths from 0.75 MHz to 14 MHz. A second component is a board with a Complex Programmable Logic Device (CPLD) chip that connects to the Femtocell and provides two USB connections to the backend computer. A third component is an analog balanced mixer up conversion section. Together these three components enable RASDR to tune from 0.015 MHz thru 3.8GHz of the radio frequency (RF) spectrum. We will demonstrate and discuss capabilities of the breadboard system and SARA members will be able to operate the unit hands-on throughout the workshop.

Vacaliuc, Bogdan [ORNL] [ORNL; Oxley, Paul [Retired] [Retired; Fields, David [ORNL] [ORNL; Kurtz, Dr. Stan [Universidad Nacional Autonoma de Mexico (UNAM)] [Universidad Nacional Autonoma de Mexico (UNAM); Leech, Marcus [Shirleys Bay Radio Astronomy Consortium] [Shirleys Bay Radio Astronomy Consortium

2012-01-01T23:59:59.000Z

459

On the origin of radio emission from magnetars  

E-Print Network [OSTI]

Magnetars are the most magnetized objects in the known universe. Powered by the magnetic energy, and not by the rotational energy as in the case of radio pulsars, have long been regarded as a completely different class of neutron stars. The discovery of pulsed radio emission from a few magnetars weakened the idea of a clean separation between magnetars and normal pulsars. We use the Partially Screened Gap (PSG) model to explain radio emission of magnetars. The PSG model requires that the temperature of the polar cap is equal to the so-called critical value, i.e. the temperature at which the thermal ions outflowing from the stellar surface screen the acceleration gap. We show that a magnetar has to fulfill the 'temperature', 'power' and 'visibility' conditions in order to emit radio waves. Firstly, in order to form PSG the residual temperature of the surface has to be lower than the critical value. Secondly, since the radio emission is powered by the rotational energy it has to be high enough to enable heating...

Szary, Andrzej; Gil, Janusz

2014-01-01T23:59:59.000Z

460

ELECTRON-BEAM-INDUCED RADIO EMISSION FROM ULTRACOOL DWARFS  

SciTech Connect (OSTI)

We present the numerical simulations for an electron-beam-driven and loss-cone-driven electron-cyclotron maser (ECM) with different plasma parameters and different magnetic field strengths for a relatively small region and short timescale in an attempt to interpret the recent discovered intense radio emission from ultracool dwarfs. We find that a large amount of electromagnetic (EM) field energy can be effectively released from the beam-driven ECM, which rapidly heats the surrounding plasma. A rapidly developed high-energy tail of electrons in velocity space (resulting from the heating process of the ECM) may produce the radio continuum depending on the initial strength of the external magnetic field and the electron beam current. Both significant linear polarization and circular polarization of EM waves can be obtained from the simulations. The spectral energy distributions of the simulated radio waves show that harmonics may appear from 10 to 70{nu}{sub pe} ({nu}{sub pe} is the electron plasma frequency) in the non-relativistic case and from 10 to 600{nu}{sub pe} in the relativistic case, which makes it difficult to find the fundamental cyclotron frequency in the observed radio frequencies. A wide frequency band should therefore be covered by future radio observations.

Yu, S.; Doyle, J. G.; Kuznetsov, A. [Armagh Observatory, College Hill, Armagh BT61 9DG (United Kingdom); Hallinan, G. [California Institute of Technology, 1200 E. California Blvd., Pasadena, CA 91125 (United States); Antonova, A. [Department of Astronomy, St. Kliment Ohridski University of Sofia, 5 James Bourchier Blvd., 1164 Sofia (Bulgaria); MacKinnon, A. L. [School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ (United Kingdom); Golden, A., E-mail: syu@arm.ac.uk [Price Center, Albert Einstein College of Medicine, Yeshiva University, Bronx, NY 10461 (United States)

2012-06-10T23:59:59.000Z

Note: This page contains sample records for the topic "wolc radio tower" 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.


461

Subdue solids in towers  

SciTech Connect (OSTI)

Many distillation, absorption, and stripping columns operate with solids present in the system. The presence of solids may be either intentional or unintentional. But, in all cases, the solids must be handled or tolerated by the vapor/liquid mass-transfer equipment. Such solids should be dealt with by a combination of four methods. From most favorable to least favorable, these are: (1) keep the solids out; (2) keep the solids moving; (3) put the solids somewhere harmless; and (4) make it easier to clean the hardware. The key precept for all these approaches is the realization that solids present in a system just don't disappear. In this article, the authors review the techniques and design issues involved in making a vapor/liquid mass-transfer system operate with solids present. They assume that the solids cannot be kept out, eliminating the first choice. The type of mass-transfer service does not matter. The same principles apply equally well to distillation, adsorption, and stripping. They include equipment design criteria based on the methods outlined above, as well as detailed recommendations for each of the major equipment choices that can be made for mass-transfer devices. Then, they illustrate the approach via an example--a vinyl chloride monomer (VCM) unit having solids as an inherent part of its feed.

Sloley, A.W.; Martin, G.R.

1995-01-01T23:59:59.000Z

462

Education Tower Emergency Instructions  

E-Print Network [OSTI]

Security at 403-220-5333 from a safe location Hazardous Materials Spill Only attempt to clean up a spill to an armed assailant, run away from the subject Hide - if you cannot flee, or do not know the location of the shooter, hide in a locked or barricaded room and turn out the lights Fight ­ if confronted by the shooter

de Leon, Alex R.

463

Method and Apparatus for Pasteurizing Shell Eggs Using Radio Frequency  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Method and Apparatus for Pasteurizing Shell Eggs Using Radio Frequency Method and Apparatus for Pasteurizing Shell Eggs Using Radio Frequency Heating" Inventors..--.. Christopher D. Brunkhorst, David J. Geveke, Andrew B. W. Bigley. This disclosure is directed to a system for pasteurizing shell eggs. The system includes an egg rotating assembly structured to rotate the egg, and electrodes that are in contact with the egg. The system is structured so that, as the rotating assembly rotates the egg, radio frequency energy is directed to the egg to pasteurize it. Nearly 200 million "shell eggs" are consumed in the United States (US) each day. "Shell eggs" are non-powdered conventional eggs that are naturally produced by hens. Shell eggs are among the most nutritious foods on earth and can be part of a healthy diet. However, some unbroken, clean, fresh

464

The Redshift Distribution of Flat-Spectrum Radio Sources  

E-Print Network [OSTI]

The redshift distribution of flat-spectrum radio sources with 5 GHz flux densities S>5 mJy is a key component in using current radio lens surveys to probe the cosmological model. We have constructed the first flat-spectrum radio sample in the flux density range 3-20 mJy. Our new sample has 33 sources; we have determined the redshifts of 14 of these (42% complete). The low mean redshift, ~0.75, of our faintest sample needs to be confirmed by further observations to improve the sample completeness. We also increased the redshift completeness of several surveys of brighter flat-spectrum sources. While the mean redshift, ~1.1 of flat-spectrum samples fainter than 1 Jy is nearly constant, the fraction of the sources identifiable as quasars steadily drops from ~80% to ~10% as the flux density of the sources decreases.

J. A. Munoz; E. E. Falco; C. S. Kochanek; J. Lehar; E. Mediavilla

2003-05-20T23:59:59.000Z

465

Low frequency radio spectrum and spectral turnover of LS 5039  

E-Print Network [OSTI]

LS 5039, a possible black hole x-ray binary, was recently observed with Giant Meterwave Radio Telescope. The observed spectrum presented here shows that the spectrum is inverted at the low frequency. When combined with the archival data with orbital phase similar to the present observations, it shows a clear indication of a spectral turnover. The combined data are fitted with a broken power-law and the break frequency signifies a possible spectral turnover of the spectrum around 964 MHz. Truly simultaneous observations in radio wavelength covering a wide range of frequencies are required to fix the spectrum and the spectral turn over which will play a crucial role in developing a deeper understanding of the radio emitting jet in LS 5039.

Sagar Godambe; Subir Bhattacharyya; Nilay Bhatt; Manojendu Choudhury

2008-07-15T23:59:59.000Z

466

A Survey on Dynamic Spectrum Access Techniques for Cognitive Radio  

E-Print Network [OSTI]

Cognitive radio (CR) is a new paradigm that utilizes the available spectrum band. The key characteristic of CR system is to sense the electromagnetic environment to adapt their operation and dynamically vary its radio operating parameters. The technique of dynamically accessing the unused spectrum band is known as Dynamic Spectrum Access (DSA). The dynamic spectrum access technology helps to minimize unused spectrum bands. In this paper, main functions of Cognitive Radio (CR) i.e. spectrum sensing, spectrum management, spectrum mobility and spectrum sharing are discussed. Then DSA models are discussed along with different methods of DSA such as Command and Control, Exclusive-Use, Shared Use of Primary Licensed User and Commons method. Game-theoretic approach using Bertrand game model, Markovian Queuing Model for spectrum allocation in centralized architecture and Fuzzy logic based method are also discussed and result are shown.

Garhwal, Anita

2012-01-01T23:59:59.000Z

467

Electron beam induced radio emission from ultracool dwarfs  

E-Print Network [OSTI]

We present the numerical simulations for an electron-beam-driven and loss-cone-driven electron-cyclotron maser (ECM) with different plasma parameters and different magnetic field strengths for a relatively small region and short time-scale in an attempt to interpret the recent discovered intense radio emission from ultracool dwarfs. We find that a large amount of electromagnetic field energy can be effectively released from the beam-driven ECM, which rapidly heats the surrounding plasma. A rapidly developed high-energy tail of electrons in velocity space (resulting from the heating process of the ECM) may produce the radio continuum depending on the initial strength of the external magnetic field and the electron beam current. Both significant linear polarization and circular polarization of electromagnetic waves can be obtained from the simulations. The spectral energy distributions of the simulated radio waves show that harmonics may appear from 10 to 70$\

Yu, S; Kuznetsov, A; Hallinan, G; Antonova, A; MacKinnon, A L; Golden, A

2012-01-01T23:59:59.000Z

468

Multiphase turbulent interstellar medium: some recent results from radio astronomy  

E-Print Network [OSTI]

The radio frequency 1.4 GHz transition of the atomic hydrogen is one of the important tracers of the diffuse neutral interstellar medium. Radio astronomical observations of this transition, using either a single dish telescope or an array interferometer, reveal different properties of the interstellar medium. Such observations are particularly useful to study the multiphase nature and turbulence in the interstellar gas. Observations with multiple radio telescopes have recently been used to study these two closely related aspects in greater detail. Using various observational techniques, the density and the velocity fluctuations in the Galactic interstellar medium was found to have a Kolmogorov-like power law power spectra. The observed power law scaling of the turbulent velocity dispersion with the length scale can be used to derive the true temperature distribution of the medium. Observations from a large ongoing atomic hydrogen absorption line survey have also been used to study the distribution of gas at d...

Roy, Nirupam

2015-01-01T23:59:59.000Z

469

Dynamical friction of radio galaxies in galaxy clusters  

E-Print Network [OSTI]

The distribution of luminous radio galaxies in galaxy clusters has been observed to be concentrated in the inner region. We consider the role of dynamical friction of massive galaxies ($M\\sim 10^{12.5}$ M$_{\\odot}$), assuming them to be hosts of luminous radio galaxies, and show that beginning with a Navarro-Frenk-White density profile of a cluster of mass $M_{cl}\\sim 10^{15}$ M$_{\\odot}$ of concentration $c\\sim 5$ and collapsing at $z\\sim 1$, the density profile of radio galaxies evolve to a profile of concentration $c \\sim 25$, as observed, in a time scale of $t\\sim 3\\hbox{--}5$ Gyr.

Biman B. Nath

2008-04-22T23:59:59.000Z

470

Life Cycle Environmental Impacts Resulting from the Manufacture of the Heliostat Field for a Reference Power Tower Design in the United States: Preprint  

SciTech Connect (OSTI)

Life cycle assessment (LCA) is recognized as a useful analytical approach for quantifying environmental impacts of renewable energy technologies, including concentrating solar power (CSP). An LCA accounts for impacts from all stages in the development, operation, and decommissioning of a CSP plant, including such upstream stages as the extraction of raw materials used in system components, manufacturing of those components, and construction of the plant. The National Renewable Energy Laboratory is conducting a series of LCA studies for various CSP technologies. This paper contributes to a thorough LCA of a 100 MWnet molten salt power tower CSP plant by estimating the environmental impacts resulting from the manufacture of heliostats. Three life cycle metrics are evaluated: greenhouse gas emissions, water consumption, and cumulative energy demand. The heliostat under consideration (the 148 m2 Advanced Thermal Systems heliostat) emits 5,300 kg CO2eq, consumes 274 m3 of water, and requires 159,000 MJeq during its manufacture. Future work will incorporate the results from this study into the LCA model used to estimate the life cycle impacts of the entire 100 MWnet power tower CSP plant.

Heath, G.; Burkhardt, J.; Turchi, C.

2012-10-01T23:59:59.000Z

471

Acoustic Imaging Evaluation of Juvenile Salmonid Behavior in the Immediate Forebay of the Water Temperature Control Tower at Cougar Dam, 2010  

SciTech Connect (OSTI)

This report presents the results of an evaluation of juvenile Chinook salmon (Oncorhynchus tshawytscha) behavior at Cougar Dam on the south fork of the McKenzie River in Oregon in 2010. The study was conducted by the Pacific Northwest National Laboratory for the U.S. Army Corps of Engineers (USACE). The overall goal of the study was to characterize juvenile salmonid behavior and movement patterns in the immediate forebay of the Water Temperature Control (WTC) tower of the dam for USACE and fisheries resource managers use in making decisions about bioengineering designs for long-term structures and/or operations to facilitate safe downstream passage for juvenile salmonids. We collected acoustic imaging (Dual-Frequency Identification Sonar; DIDSON) data from March 1, 2010, through January 31, 2011. Juvenile salmonids (hereafter, called 'fish') were present in the immediate forebay of the WTC tower throughout the study. Fish abundance index was low in early spring (<200 fish per sample-day), increased in late April, and peaked on May 19 (6,039 fish). A second peak was observed on June 6 (2904 fish). Fish abundance index decreased in early June and remained low in the summer months (<100 fish per sample-day). During the fall and winter, fish numbers varied with a peak on November 10 (1881 fish) and a minimum on December 7 (12 fish). A second, smaller, peak occurred on December 22 (607 fish). A univariate statistical analysis indicated fish abundance index (log10-transformed) was significantly (P<0.05) positively correlated with forebay elevation, velocity over the WTC tower intake gate weirs, and river flows into the reservoir. A subsequent multiple regression analysis resulted in a model (R2=0.70) predicting fish abundance (log-transformed index values) using two independent variables of mean forebay elevation and the log10 of the forebay elevation range. From the approximate fish length measurements made using the DIDSON imaging software, the average fish length during early spring 2010 was 214 {+-} 86 mm (standard deviation). From May through early November, the average fish length remained relatively consistent (132 {+-} 54 mm), after which average lengths increased to 295 {+-} 148 mm for mid-November though early December. From mid-December through January the average fish length decreased to 151 {+-} 76 mm. Milling in front of the WTC tower was the most common fish behavior observed throughout the study period. Traversing along the front of the tower, east-to-west and west-to-east, was the next common behavior. The percentage of fish events showing movement from the forebay to the tower or from the tower to the forebay was generally low throughout the spring, summer, and early fall (0 to 30% for both directions combined, March through early November). From mid-November 2010 through the end of the study (January 31, 2011), the combined percentages of fish moving into and out of the tower were higher (25 to 70%) than during previous months of the study. Schooling behavior was most distinct in the spring. Schooling events were present in 30 to 96% of the fish events during that period, with a peak on May 19. Schooling events were also present in the summer, but at lower numbers. With the exception of some schooling in mid-December, few to no schooling events were observed in the fall and winter months. Diel distributions for schooling fish during spring and fall months indicate schooling was concentrated during daylight hours and no schooling was observed at night. However, in December, schooling occurred at night, after midnight, and during daylight hours. Predator activity, most likely bull trout or rainbow trout according to a USACE biologist, was observed during late spring, when fish abundance index and schooling were highest for the year, and again in the fall months when fish events increased from a summer low. No predator activity was observed in the summer, and little activity occurred during the winter months.

Khan, Fenton; Johnson, Gary E.; Royer, Ida M.; Phillips, Nathan RJ; Hughes, James S.; Fischer, Eric S.; Ham, Kenneth D.; Ploskey, Gene R.

2012-04-01T23:59:59.000Z

472

Diode pumped solid state kilohertz disk laser system for time-resolved combustion diagnostics under microgravity at the drop tower Bremen  

SciTech Connect (OSTI)

We describe a specially designed diode pumped solid state laser system based on the disk laser architecture for combustion diagnostics under microgravity (?g) conditions at the drop tower in Bremen. The two-stage oscillator-amplifier-system provides an excellent beam profile (TEM{sub 00}) at narrowband operation (?? < 1 pm) and is tunable from 1018 nm to 1052 nm. The laser repetition rate of up to 4 kHz at pulse durations of 10 ns enables the tracking of processes on a millisecond time scale. Depending on the specific issue it is possible to convert the output radiation up to the fourth harmonic around 257 nm. The very compact laser system is integrated in a slightly modified drop capsule and withstands decelerations of up to 50 g (>11 ms). At first the concept of the two-stage disk laser is briefly explained, followed by a detailed description of the disk laser adaption to the drop tower requirements with special focus on the intended use under ?g conditions. In order to demonstrate the capabilities of the capsule laser as a tool for ?g combustion diagnostics, we finally present an investigation of the precursor-reactions before the droplet ignition using 2D imaging of the Laser Induced Fluorescence of formaldehyde.

Wagner, Volker; Paa, Wolfgang; Triebel, Wolfgang [Institute of Photonic Technology, Laser Diagnostics, Albert-Einstein-Str. 9, 07745 Jena (Germany)] [Institute of Photonic Technology, Laser Diagnostics, Albert-Einstein-Str. 9, 07745 Jena (Germany); Eigenbrod, Christian; Klinkov, Konstantin [Center of Applied Space Technology and Microgravity, University Bremen, Am Fallturm, 28359 Bremen (Germany)] [Center of Applied Space Technology and Microgravity, University Bremen, Am Fallturm, 28359 Bremen (Germany); Larionov, Mikhail; Giesen, Adolf; Stolzenburg, Christian [Institut fr Strahlwerkzeuge (IFSW), Pfaffenwaldring 43, 70569 Stuttgart (Germany)] [Institut fr Strahlwerkzeuge (IFSW), Pfaffenwaldring 43, 70569 Stuttgart (Germany)

2014-03-15T23:59:59.000Z

473

ON THE EXISTENCE OF 'RADIO THERMALLY ACTIVE' GALACTIC SUPERNOVA REMNANTS  

SciTech Connect (OSTI)

In this paper, we investigate the possibility of significant production of thermal bremsstrahlung radiation at radio continuum frequencies that could be linked to some Galactic supernova remnants (SNRs). The main targets for this investigation are SNRs expanding in high-density environments. There are several indicators of radio thermal bremsstrahlung radiation from SNRs, such as a flattening at higher frequencies and thermal absorption at lower frequencies intrinsic to an SNR. In this work, we discuss the radio continuum properties of three SNRs that are the best candidates for testing our hypothesis of significant thermal emission. In the case of SNRs IC 443 and 3C 391, thermal absorption has been previously detected. For IC 443, the contribution of thermal emission at 1 GHz, from our model fit is 3%-57%. It is similar to the estimate obtained from the thermal absorption properties (10%-40% at 1 GHz). In the case of the 3C 391 the conclusions are not so clear. The results from our model fit (thermal emission contribution of 10%-25% at 1 GHz) and results obtained from the low-frequency absorption (thermal contribution of 0.15%-7% at 1 GHz) do not overlap. For the SNR 3C 396 we suggest that if previously detected thermal absorption could be intrinsic to the SNR then the thermal emission (<47% at 1 GHz from our model fit) could be significant enough to shape the radio continuum spectrum at high frequencies. Polarization observations for these SNRs can constrain the strength of a thermal component. Reliable observations at low frequencies (<100 MHz) are needed as well as more data at high radio frequencies (>1 GHz), in order to make stronger conclusions about the existence of 'radio thermally active' SNRs.

Onic, D.; Urosevic, D.; Arbutina, B. [Department of Astronomy, Faculty of Mathematics, University of Belgrade (Serbia); Leahy, D. [Department of Physics and Astronomy, University of Calgary (Canada)

2012-09-01T23:59:59.000Z

474

On the Capacity of a Class of MIMO Cognitive Radios  

E-Print Network [OSTI]

Cognitive radios have been studied recently as a means to utilize spectrum in a more efficient manner. This paper focuses on the fundamental limits of operation of a MIMO cognitive radio network with a single licensed user and a single cognitive user. The channel setting is equivalent to an interference channel with degraded message sets (with the cognitive user having access to the licensed user's message). An achievable region and an outer bound is derived for such a network setting. It is shown that the achievable region is optimal for a portion of the capacity region that includes sum capacity.

Sridharan, Sriram

2007-01-01T23:59:59.000Z

475

Current Problems for X-ray Emission from Radio Jets  

E-Print Network [OSTI]

A list is presented of known extragalactic radio jets which also have associated X-ray emission. The canonical emission processes for the production of X-rays are reviewed and the sources are categorized on the basis of our current understanding. Although it seems clear that the X-ray emission is non-thermal, the two competing processes, synchrotron and inverse Compton emissions, arise from extremely high energy (synchrotron) or extremely low energy (beaming models with IC emission), relativistic electrons. Only synchrotron self-Compton emission from a few hotspots provides information on the `normal' energy range of the electrons responsible for the observed radio emission.

D. E. Harris

2000-12-17T23:59:59.000Z

476

A Feedback Model for Radio Sources Fueled by Cooling Flows  

Science Journals Connector (OSTI)

In many clusters of galaxies, radiative cooling in the central regions appears to drive an accretion flow. Many of these "cooling-flow clusters" possess strong radio sources in the central regions, which suggests a causal relation between the cooling flow and the radio source. We consider a general model in which a cooling flow produces and interacts with relativistic electrons in the core of the cluster. These electrons heat the inflowing gas, generating negative feedback that reduces the accretion rate. For sufficiently strong feedback, the accretion flow shows an oscillatory behavior on a timescale of several hundred million years.

Wallace Tucker; Laurence

1997-01-01T23:59:59.000Z

477

Radio Frequency Diesel Particulate Filter Sensor Reduces Fuel Consumption, Wins R&D 100 Award  

Office of Energy Efficiency and Renewable Energy (EERE)

Radio Frequency Diesel Particulate Filter Sensor (RF-DPF) is a sensor that uses radio frequencies to measure the amount and distribution of soot and ash in the filters that remove particulate matter from the exhaust of diesel engines.

478

STANFORD AMATEUR RADIO STATION W6YX PRESS RELEASE June 19, 2008  

E-Print Network [OSTI]

such as the loss of electricity. "We want the community to know that in the event of an emergency, ham radio the 1920s, the Stanford Amateur Radio Club has been a home to wireless and electronics pioneers, including

Straight, Aaron

479

Framing Peace, the case of conciliatory radio programming in Burundi and Uganda  

E-Print Network [OSTI]

This working paper uses insights from completed research on peace radio in Uganda to discuss the strategy for completing the same interrogation of peace radio in Burundi. In relative detail, the paper discusses how and why the peace journalism...

Tayeebwa, William

480

IAU DIVISION X, XII / COMMISSION 40, 41 / WORKING GROUP on HISTORICAL RADIO ASTRONOMY  

E-Print Network [OSTI]

IAU DIVISION X, XII / COMMISSION 40, 41 / WORKING GROUP on HISTORICAL RADIO ASTRONOMY CHAIR Kenneth. Introduction The IAU Working Group on Historical Radio Astronomy (WGHRA) was formed at the 2003 General Assembly of the IAU as a Joint Working Group of Commissions 40 (Radio Astronomy) and 41 (History

Groppi, Christopher

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481

Ontology-based Spectrum Access Policies for Policy-based Cognitive Radios  

E-Print Network [OSTI]

Ontology-based Spectrum Access Policies for Policy-based Cognitive Radios Behnam Bahrak, Jung radios (CRs) need to be able to cope with the constantly changing spectrum environment, evolving spectrum, to alleviate the spectrum shortage problem. The cognitive radio is seen as one of the key technologies

482

Optimal Spectrum Sharing for Multi-hop Software Defined Radio Networks  

E-Print Network [OSTI]

Optimal Spectrum Sharing for Multi-hop Software Defined Radio Networks Y. Thomas Hou Yi Shi Hanif D. The uneven size of bands in the radio spectrum prompts the need of further division into sub the required network-wide radio spectrum resource for a set of user sessions. Since such problem formulation

Hou, Y. Thomas

483

Analysis of Spectrum Utilization in Suburb Environment Evaluation of Potentials for Cognitive Radio  

E-Print Network [OSTI]

antenna. Our results show that the radio spectrum is not utilized in an optimal manner and that there do in an opportunistic way. Cognitive radio concept for better spectrum utilization is introduced here along allocation. The radio spectrum is assigned or sold to users on long term basis, covering large regions like

Paris-Sud XI, Université de

484

Computer Networks 00 (2012) 120 Spectrum Access Policy Reasoning for Policy-Based Cognitive Radios  

E-Print Network [OSTI]

}@vt.edu Abstract Cognitive radio (CR) is one of the key enabling technologies for opportunistic spectrum sharing. In such a spec- trum sharing paradigm, radios access spectrum opportunistically by identifying the under. Keywords: Spectrum access policy, cognitive radio, policy reasoner, binary decision diagram, policy algebra

485

On the Performance of Dimension Estimation-based Spectrum Sensing for Cognitive Radio  

E-Print Network [OSTI]

On the Performance of Dimension Estimation-based Spectrum Sensing for Cognitive Radio Bassem Zayen-day spectrum allocation and spectrum use suggests that radio spectrum shortage could be overcome by allowing immediate local spectrum availability. A new class of radios that is able to reliably sense the spectral

Gesbert, David

486

Competitive Sharing of the Spectrum in Cognitive Radio Network: A Market Equilibrium Framework  

E-Print Network [OSTI]

Competitive Sharing of the Spectrum in Cognitive Radio Network: A Market Equilibrium Framework of pricing the spectrum usage in a cognitive radio network. In such a network, where licensed/primary users radio spectrum allocation scheme requires that the telecommunication industry's regulator (for example

Paris-Sud XI, Université de

487

A Combined Spectrum Sensing and Terminals Localization Technique for Cognitive Radio  

E-Print Network [OSTI]

A Combined Spectrum Sensing and Terminals Localization Technique for Cognitive Radio Networks Wael. This constant track of the environment change is called the "spectrum sensing" function of a cognitive radio, 06904, Sophia Antipolis, France Corresponding author: Wael.Guibene@eurecom.fr Abstract--Cognitive radio

Gesbert, David

488

Auction-based Agent Negotiation in Cognitive Radio Ad Hoc Networks  

E-Print Network [OSTI]

of spectrum. To solve the problem of congestion, cognitive radio networks use dynamic spectrum access spectrum access. 1 Introduction The Cognitive Radio (CR) is a form of wireless communication in which are not and can move to unused channels. This optimizes the use of available radio frequency spectrum while

489

Prediction of Channel State for Cognitive Radio Using Higher-Order Hidden Markov Model  

E-Print Network [OSTI]

-- Spectrum sensing detects the availability of the radio frequency spectrum, which is essential and vital to cognitive radio. Traditional techniques for spectrum sensing fail to take the latency between spectrum spectrum. It introduces "intelligence" beyond software defined radio (SDR). Spectrum sensing (SS

Qiu, Robert Caiming

490

Opportunistic Spectrum Scheduling for Mobile Cognitive Radio Networks in White Space  

E-Print Network [OSTI]

Opportunistic Spectrum Scheduling for Mobile Cognitive Radio Networks in White Space Li Zhang, Kai of secondary users, carefully scheduling the spectrum allocation in cognitive radio networks operating on white in an opportunistic manner, this paper studies how to schedule the spectrum assignment for mobile cognitive radio

California at Davis, University of

491

SUBJECT: Effective Date: Policy Number: Radio Frequency Spectrum 12-15-10 4-011  

E-Print Network [OSTI]

SUBJECT: Effective Date: Policy Number: Radio Frequency Spectrum 12-15-10 4-011 Supersedes: Page. POLICY STATEMENT: Radio frequency spectrum is a critical resource that must be managed to eliminate be approved by UCF Computer Services & Telecommunications to provide spectrum coordination and avoid radio

Glebov, Leon

492

A Coalition Formation Game for Energy-efficient Cooperative Spectrum Sensing in Cognitive Radio  

E-Print Network [OSTI]

A Coalition Formation Game for Energy-efficient Cooperative Spectrum Sensing in Cognitive Radio to realize spectrum reuse and increase the spectrum efficiency in cognitive radio networks (CRNs]. As for spectrum sensing, each SU is required to sense the radio environment within its operating range to find

Wong, Vincent

493

A major radio outburst in III Zw 2 with an extremely inverted, millimeterpeaked spectrum  

E-Print Network [OSTI]

A major radio outburst in III Zw 2 with an extremely inverted, millimeter­peaked spectrum Heino ABSTRACT III Zw 2 is a spiral galaxy with an optical spectrum and faint extended radio structure typical­band radio spectrum between 1.4 and 666 GHz shows a textbook­like synchrotron spectrum peaking at 43 GHz

Falcke, Heino

494

TRIESTE: A Trusted Radio Infrastructure for Enforcing SpecTrum Etiquettes  

E-Print Network [OSTI]

1 TRIESTE: A Trusted Radio Infrastructure for Enforcing SpecTrum Etiquettes Wenyuan Xu Pandurang presents a framework, known as TRIESTE (Trusted Radio Infrastructure for Enforcing SpecTrum Etiquettes), which can ensure that radio devices are only able to access/use the spectrum in a manner that conforms

Xu, Wenyuan

495

ROSA: Distributed Joint Routing and Dynamic Spectrum Allocation in Cognitive Radio Ad Hoc Networks  

E-Print Network [OSTI]

ROSA: Distributed Joint Routing and Dynamic Spectrum Allocation in Cognitive Radio Ad Hoc Networks opportunistic spectrum access and dynamic routing algorithm for cognitive radio networks is proposed, called Keywords Cognitive Radio Networks, routing, dynamic spectrum allocation, cross-layer design 1. INTRODUCTION

Melodia, Tommaso

496

Proportional and Double Imitation Rules for Spectrum Access in Cognitive Radio Networks$  

E-Print Network [OSTI]

Proportional and Double Imitation Rules for Spectrum Access in Cognitive Radio Networks$ Stefano as a promising paradigm to enable more efficient spectrum utilization. Spectrum access models in cognitive radio-scale cognitive radio net- works from an evolutionary game theoretic angle. We formulate the spectrum access

Paris-Sud XI, Université de

497

Collaborative Spectrum Sensing from Sparse Observations Using Matrix Completion for Cognitive Radio Networks  

E-Print Network [OSTI]

Collaborative Spectrum Sensing from Sparse Observations Using Matrix Completion for Cognitive Radio Abstract-- In cognitive radio, spectrum sensing is a key component to detect spectrum holes (i.e., channels not used by any primary users). Collaborative spectrum sensing among the cognitive radio nodes is expected

Yin, Wotao

498

IEEE TRANSACTIONS ON SYSTEMS, MAN, AND CYBERNETICS PART B 1 Spectrum Sharing in Cognitive Radio Networks  

E-Print Network [OSTI]

IEEE TRANSACTIONS ON SYSTEMS, MAN, AND CYBERNETICS ­ PART B 1 Spectrum Sharing in Cognitive Radio of radio frequency spectrum. In this paper, we consider the problem of spectrum sharing among primary (or Terms--Cognitive radio, spectrum sensing, spectrum sharing, game theory, Nash equilibrium. I

Wang, Xinbing

499

Asymmetric Cooperative Communications Based Spectrum Leasing via Auctions in Cognitive Radio  

E-Print Network [OSTI]

1 Asymmetric Cooperative Communications Based Spectrum Leasing via Auctions in Cognitive Radio for dynamic spectrum sharing (DSS) in cognitive radio networks (CRN's). In this paper, we propose a new way--Cognitive radios, cooperative communications, distributed dynamic spectrum leasing, dynamic spectrum access

Jayaweera, Sudharman K.

500

Quickest Spectrum Sensing in Cognitive Radio Husheng Li, Chengzhi Li and Huaiyu Dai  

E-Print Network [OSTI]

1 Quickest Spectrum Sensing in Cognitive Radio Husheng Li, Chengzhi Li and Huaiyu Dai Abstract spectrum sensing in secondary radio systems without data fusion centers. Performance is evaluated using to detect the primary radio signal. The fundamental limits of spectrum sensing are discussed in [15] while

Dai, Huaiyu