Powered by Deep Web Technologies
Note: This page contains sample records for the topic "holiday light strings" 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

Save Money with LED Holiday Light Strings | Department of Energy  

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

Money with LED Holiday Light Strings Money with LED Holiday Light Strings Save Money with LED Holiday Light Strings December 1, 2009 - 11:19am Addthis Allison Casey Senior Communicator, NREL It's hard to believe, but the holidays are in full swing and many of you are starting to decorate your homes. Those of you who started around Halloween are probably feeling pretty smart because you got your decorating done while the weather was nice. I see you there, snacking on your Thanksgiving leftovers, laughing at me shivering in the cold and struggling to undo the knot in my lights. Don't look so smug. Those of us who haven't started decorating yet may actually be the smart ones this year, because we still have a chance to buy LED light strings. LED (or light emitting diode) light strings can use 90% less energy than

2

LED Holiday Lights: Festive, Safe, and Efficient! | Department of Energy  

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

Holiday Lights: Festive, Safe, and Efficient! Holiday Lights: Festive, Safe, and Efficient! LED Holiday Lights: Festive, Safe, and Efficient! November 23, 2010 - 6:30am Addthis Allison Casey Senior Communicator, NREL This week brings a day that many people look forward to all year-and I'm not talking about Thanksgiving, or Black Friday. I'm talking about that magical day when it's finally okay to drag the dusty boxes from the basement or attic, to lovingly sort and display your decorations, to untangle your light strings and set up the stepladder, all in anticipation of one glorious moment: Dad's annual trip to the emergency room. I kid (and sincerely hope that's not your yearly ritual), but in addition to safety when hanging your lights this year, I hope you'll think about something else: efficiency.

3

LED Holiday Lights: Festive, Safe, and Efficient! | Department of Energy  

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

LED Holiday Lights: Festive, Safe, and Efficient! LED Holiday Lights: Festive, Safe, and Efficient! LED Holiday Lights: Festive, Safe, and Efficient! December 2, 2010 - 4:34pm Addthis Andy Oare Andy Oare Former New Media Strategist, Office of Public Affairs Ed. Note cross posted from the Energy Savers Blog. Written by Allison Casey This week brings a day that many people look forward to all year -- and I'm not talking about Thanksgiving, or Black Friday. I'm talking about that magical day when it's finally okay to drag the dusty boxes from the basement or attic, to lovingly sort and display your decorations, to untangle your light strings and set up the stepladder, all in anticipation of one glorious moment: Dad's annual trip to the emergency room. I kid (and sincerely hope that's not your yearly ritual), but in addition

4

Have You Used LED Light Strings? | Department of Energy  

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

LED Light Strings? LED Light Strings? Have You Used LED Light Strings? December 3, 2009 - 7:30am Addthis This week, you read about LED holiday light strings, which can use 90% less energy than regular incandescent light strings. You may even be able to save on the initial costs with rebates from stores or your utility; check to find out what's being offered in your area. Have you used LED light strings? Tell us what you think of them. Each Thursday, you have the chance to share your thoughts on a question about energy efficiency or renewable energy for consumers. E-mail your responses to the Energy Saver team at consumer.webmaster@nrel.gov. Addthis Related Articles Save Money with LED Holiday Light Strings Tips to Save Energy During the Holidays Choosing Energy-Saving Lighting Products Saves You Money

5

What Do You Think of Your LED Holiday Lights? | Department of Energy  

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

Think of Your LED Holiday Lights? Think of Your LED Holiday Lights? What Do You Think of Your LED Holiday Lights? December 23, 2010 - 6:30am Addthis This year, we've been encouraging people to switch to LED light strings for their holiday decorations. With the many options for shapes, colors, and sizes, people are discovering that they like or dislike various aspects of the lights. One of the biggest things to like, of course, is the major energy savings, but some folks have also discovered that the lights have a slightly different color or reflect off of ornaments in a different way. Change can be difficult, especially when we've been seeing the same types of decorations for so many years, but we hope that you've made the switch and are enjoying the savings and festivity that LED lights can add to your

6

What Do You Think of Your LED Holiday Lights? | Department of Energy  

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

What Do You Think of Your LED Holiday Lights? What Do You Think of Your LED Holiday Lights? What Do You Think of Your LED Holiday Lights? December 23, 2010 - 6:30am Addthis This year, we've been encouraging people to switch to LED light strings for their holiday decorations. With the many options for shapes, colors, and sizes, people are discovering that they like or dislike various aspects of the lights. One of the biggest things to like, of course, is the major energy savings, but some folks have also discovered that the lights have a slightly different color or reflect off of ornaments in a different way. Change can be difficult, especially when we've been seeing the same types of decorations for so many years, but we hope that you've made the switch and are enjoying the savings and festivity that LED lights can add to your

7

Light from cosmic strings  

Science Conference Proceedings (OSTI)

The time-dependent metric of a cosmic string leads to an effective interaction between the string and photons--the ''gravitational Aharonov-Bohm'' effect--and causes cosmic strings to emit light. We evaluate the radiation of pairs of photons from cosmic strings and find that the emission from cusps, kinks and kink-kink collisions occurs with a flat spectrum at all frequencies up to the string scale. Further, cusps emit a beam of photons, kinks emit along a curve, and the emission at a kink-kink collision is in all directions. The emission of light from cosmic strings could provide an important new observational signature of cosmic strings that is within reach of current experiments for a range of string tensions.

Steer, Daniele A.; Vachaspati, Tanmay [APC 10 rue Alice Domon et Leonie Duquet, 75205 Paris Cedex 13 (France); Physics Department, Arizona State University, Tempe, Arizona 85287 (United States)

2011-02-15T23:59:59.000Z

8

Today LED Holiday Lights, Tomorrow the World?  

SciTech Connect

This article for The APEM Advantage, the quarterly newsletter of the Association of Professional Energy Managers (APEM) describes the recent increase in the popularity of light emitting diode (LED) lighting and compares LED light output with that of incandescent and compact fluorescent lighting.

Gordon, Kelly L.

2004-12-20T23:59:59.000Z

9

South Carolina Community Lights Up the Season with Energy-Efficient Holiday  

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

South Carolina Community Lights Up the Season with Energy-Efficient South Carolina Community Lights Up the Season with Energy-Efficient Holiday Lights South Carolina Community Lights Up the Season with Energy-Efficient Holiday Lights December 20, 2011 - 1:12pm Addthis Carolers sing in front of Forest Acres, South Carolina's new LED holiday light display. | Photo courtesy of Richland County, S.C. Carolers sing in front of Forest Acres, South Carolina's new LED holiday light display. | Photo courtesy of Richland County, S.C. Eric Escudero Eric Escudero Senior Public Affairs Specialist & Contractor, Golden Field Office What does this mean for me? LED holiday lights reduce energy usage by 90 percent when compared to traditional incandescent lights. A South Carolina community is proving that energy efficiency can improve the holidays by reducing energy and maintenance costs, thanks to its new

10

South Carolina Community Lights Up the Season with Energy-Efficient Holiday  

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

South Carolina Community Lights Up the Season with Energy-Efficient South Carolina Community Lights Up the Season with Energy-Efficient Holiday Lights South Carolina Community Lights Up the Season with Energy-Efficient Holiday Lights December 20, 2011 - 1:12pm Addthis Carolers sing in front of Forest Acres, South Carolina's new LED holiday light display. | Photo courtesy of Richland County, S.C. Carolers sing in front of Forest Acres, South Carolina's new LED holiday light display. | Photo courtesy of Richland County, S.C. Eric Escudero Eric Escudero Senior Public Affairs Specialist & Contractor, Golden Field Office What does this mean for me? LED holiday lights reduce energy usage by 90 percent when compared to traditional incandescent lights. A South Carolina community is proving that energy efficiency can improve the holidays by reducing energy and maintenance costs, thanks to its new

11

Tips to Save Energy During the Holidays | Department of Energy  

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

Tips to Save Energy During the Holidays Tips to Save Energy During the Holidays Tips to Save Energy During the Holidays December 2, 2008 - 1:33pm Addthis Allison Casey Senior Communicator, NREL The winter holiday season has officially begun, and with it comes the frenzy of decorating, holiday gatherings, gift buying, and errand running. Don't let your energy-saving efforts fall by the wayside amid all the festivities; the tips below will help you save energy and money even as you celebrate. Use LED Holiday Lights LED-or light-emitting diode-holiday lights are much more efficient than traditional incandescent lights. While the initial purchase price of LED light strings is higher, consider the cost of running each type of light string for 12 hours per day for 40 days: Type of Light Electricity Cost *

12

Post-Holiday Holiday Shopping | Department of Energy  

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

Post-Holiday Holiday Shopping Post-Holiday Holiday Shopping Post-Holiday Holiday Shopping January 10, 2012 - 4:31pm Addthis Elizabeth Spencer Communicator, National Renewable Energy Laboratory Ah, January. It's still cold and it's still dark all the time, but now all the cheerful Christmas lights have come down so there's nothing to break up the monotony. What's there to do? Well, while it's a little late now, you might want to go do some post-holiday holiday shopping. Yes, I know. That sounds insane. Everyone is thoroughly sick of holiday shopping. You've spent enough money already. I know. But I was out wandering through the stores during the first week of January when I happened to pass by heavily discounted holiday products. And in that great wasteland of 50% off products and half-empty shelves, I found a vast

13

Signature Holidays | Facebook  

U.S. Energy Information Administration (EIA)

Signature Holidays, Bangalore, India. 83 likes · 1 talking about this. To enhance your travel & holiday experiences at very competitive rates.

14

It's Finally Time to Think about the Holidays! | Department of...  

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

Addthis Using LED holiday lights is just one of the ways that you can save energy and money this holiday season. | Photo courtesy of iStockphoto.comAvailableLight Using LED...

15

Signature Holidays | Facebook  

U.S. Energy Information Administration (EIA)

Signature Holidays, Bangalore. 81 Me gusta · 2 personas están hablando de esto. To enhance your travel & holiday experiences at very competitive rates.

16

Berkeley Lab Holiday Schedule  

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

Subscribe to the Berkeley Lab Holiday Schedule via Google Calendar or ICS. Go here for Google CalendarICS subscription help. The Laboratory has announced the following holiday...

17

Energy-Efficient Holiday Decorating Tips | Department of Energy  

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

Energy-Efficient Holiday Decorating Tips Energy-Efficient Holiday Decorating Tips Energy-Efficient Holiday Decorating Tips December 19, 2012 - 10:36am Addthis Using LED lights for your holiday decorations can save you energy and money. | Photo courtesy of ©iStockphoto.com/peterspiro Using LED lights for your holiday decorations can save you energy and money. | Photo courtesy of ©iStockphoto.com/peterspiro Erik Hyrkas Erik Hyrkas Media Relations Specialist, Office of Energy Efficiency & Renewable Energy What does this mean for me? You can save money on your holiday lighting while still enjoying a decorated household. With holidays almost upon us and home decorating to do, costs and energy savings should be on the brain. So as you put the finishing touches on that giant lighting display, be sure to read these energy-efficient holiday

18

Energy-Efficient Holiday Decorating Tips | Department of Energy  

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

Tips Energy-Efficient Holiday Decorating Tips December 19, 2012 - 10:36am Addthis Using LED lights for your holiday decorations can save you energy and money. | Photo courtesy of...

19

STRING  

E-Print Network (OSTI)

This document describes the STRING programming language which has been implemented on the MAC Artificial Group's PDP-6 computer. In the STRING system, all objects--constants, variables, functions and programs--are ...

Samson, Peter

1967-09-01T23:59:59.000Z

20

Holiday Gift Drive  

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

Holiday Gift Drive Holiday Gift Drive Holiday Gift Drive Every year, Laboratory employees help fulfill the holiday wishes of children and seniors in our communities. In 2012, our employees helped more than 1,030 Northern New Mexico children, senior citizens and families have a brighter holiday season. September 16, 2013 Every holiday season, employees of Los Alamos National Laboratory donate and distribute gifts to families in need throughout Northern New Mexico. Contacts Giving Drives Ed Vigil Community Programs Office (505) 665-9205 Email Giving Drives Enrique Trujillo Community Programs Office (505) 665-6384 Email Helping New Mexico families feel the holiday spirit The 2013 campaign runs from November 21-December 18. 2012 Holiday Gift Drive partners Boys and Girls Club Del Norte (Abiquiu Site)

Note: This page contains sample records for the topic "holiday light strings" 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

Holiday Food Drive  

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

Food Drive Food Drive Holiday Food Drive During the recent holiday food drive, employees donated enough food to provide about 23,604 holiday meals for Northern New Mexico families. More than 432 frozen turkeys were donated this year by employees and other donors during 'Bring a Turkey to Work Day,' an annual Lab event that takes places Thanksgiving week. September 16, 2013 LANL employees organize food for the Holiday Food Drive. Contacts Giving Drives Ed Vigil Community Programs Office (505) 665-9205 Email Giving Drives Enrique Trujillo Community Programs Office (505) 665-6384 Email Helping feed Northern New Mexico families Community partners The Food Depot (Santa Fe) Del Norte Credit Union Smith's Food and Drug Giving Holiday Food Drive Holiday Gift Drive LANL Laces Los Alamos Employees' Scholarship Fund

22

Holiday Gifts for Energy Efficiency | Department of Energy  

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

Holiday Gifts for Energy Efficiency Holiday Gifts for Energy Efficiency Holiday Gifts for Energy Efficiency December 18, 2013 - 3:58pm Addthis Energy-efficient light bulbs can make great energy-saving stocking stuffers. Energy-efficient light bulbs can make great energy-saving stocking stuffers. Erik Hyrkas Erik Hyrkas Media Relations Specialist, Office of Energy Efficiency & Renewable Energy How can I participate? Look for these energy-saving gifts while doing your holiday shopping this year. As the days get colder and shopping becomes a holiday pastime, it's a great opportunity to think about efficiency and savings (and that doesn't just mean rationing wrapping paper). With that in mind, I've drawn up a list of energy-efficient holiday gifts for your energy-conscious loved ones. With these gifts, your carbon footprint and home electric bill could

23

Fuel Cell Powers Up Festivities at Secretary Chu's Holiday Party |  

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

Fuel Cell Powers Up Festivities at Secretary Chu's Holiday Party Fuel Cell Powers Up Festivities at Secretary Chu's Holiday Party Fuel Cell Powers Up Festivities at Secretary Chu's Holiday Party December 16, 2011 - 11:25am Addthis A clean, efficient fuel cell powered the tree lights at the 2011 Energy Department holiday party. | Energy Department file photo. A clean, efficient fuel cell powered the tree lights at the 2011 Energy Department holiday party. | Energy Department file photo. Sunita Satyapal Program Manager, Hydrogen & Fuel Cell Technology Program How does it work? Fuel cells work like batteries, but they do not run down or need recharging. They produce electricity and heat as long as fuel is supplied. Employees at the Energy Department's annual holiday party were greeted with many familiar sights - festive decorations, sugar cookies, and a

24

NERSC Holiday Schedule  

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

NERSC NERSC Holiday Schedule NERSC Holiday Schedule December 20, 2013 by Francesca Verdier (0 Comments) All NERSC computing and storage systems will remain in full operation throughout the holiday season (Tuesday December 24 through Wednesday January 1). From Tuesday December 24 through Wednesday January 1, NERSC Consulting and Account Support services will be available *only* on Friday December 27 and Monday December 30, from 8:00 to 5:00 Pacific Time. Normal Consulting and Account Support schedules will resume on Thursday, January 2. As always, critical system problems may be reported at any time to NERSC Operations at 1-800-666-3772, menu option 1, or 1-510-486-6821. You should also contact Operations if you need to have your password reset (or login failures cleared) over the holidays.

25

Proton stability and light Z' inspired by string derived models  

Science Conference Proceedings (OSTI)

Proton stability is one of the most perplexing puzzles in particle physics. While the renormalizable standard model forbids proton decay mediating operators due to accidental global symmetries, many of its extensions introduce such dimension four, five and six operators. Furthermore, it is, in general, expected that quantum gravity only respects local gauge, or discreet, symmetries. String theory provides the arena to study particle physics in a consistent framework of perturbative quantum gravity. An appealing proposition, in this context, is that the dangerous operators are suppressed by an Abelian gauge symmetry, which is broken near the TeV scale. A viable U(1) symmetry should also be anomaly free, be family universal, and allow the generation of fermion masses via the Higgs mechanism. We discuss such U(1) symmetries that arise in quasirealistic free fermionic heterotic-string derived models. Ensuring that the U(1) symmetry is anomaly free at the low scale requires that the standard model spectrum is augmented by additional states that are compatible with the charge assignments in the string models. We construct such string-inspired models and discuss some of their phenomenological implications.

Faraggi, Alon E.; Mehta, Viraf M. [Department of Mathematical Sciences, University of Liverpool, Liverpool, L69 7ZL (United Kingdom)

2011-10-15T23:59:59.000Z

26

It's Finally Time to Think about the Holidays! | Department of Energy  

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

It's Finally Time to Think about the Holidays! It's Finally Time to Think about the Holidays! It's Finally Time to Think about the Holidays! December 5, 2012 - 12:13pm Addthis Using LED holiday lights is just one of the ways that you can save energy and money this holiday season. | Photo courtesy of ©iStockphoto.com/AvailableLight Using LED holiday lights is just one of the ways that you can save energy and money this holiday season. | Photo courtesy of ©iStockphoto.com/AvailableLight Elizabeth Spencer Communicator, National Renewable Energy Laboratory What are the key facts? You can learn more ways to save energy and money through old Energy Saver blog posts. Last month, I was absolutely determined to keep away from the topic of Christmas LED lights because Thanksgiving hadn't even happened yet. And I

27

Gravitational Waves from Light Cosmic Strings: Backgrounds and Bursts with Large Loops  

E-Print Network (OSTI)

The mean spectrum and burst statistics of gravitational waves produced by a cosmological population of cosmic string loops are estimated using analytic approximations, calibrated with earlier simulations. Formulas are derived showing the dependence of observables on the string tension, in the regime where newly-formed loops are relatively large, not very much smaller than the horizon. Large loops form earlier, are more abundant, and generate a more intense stochastic background and more frequent bursts than assumed in earlier background estimates, enabling experiments to probe lighter cosmic strings of interest to string theory. Predictions are compared with instrument noise from current and future experiments, and with confusion noise from known astrophysical gravitational wave sources such as stellar and massive black hole binaries. In these large-loop models, current data from millisecond pulsar timing already suggests that the tension is less than about $10^{-10}$, a typical value expected in strings from brane inflation. LISA will be sensitive to stochastic backgrounds created by strings as light as $G\\mu\\approx 10^{-15}$, at frequencies where it is limited by confusion noise of Galactic stellar populations; however, for those lightest detectable strings, bursts are rarely detectable.

Craig J. Hogan

2006-05-22T23:59:59.000Z

28

Solar Field Powers Historic Garden Holiday Display | Department of Energy  

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

Field Powers Historic Garden Holiday Display Field Powers Historic Garden Holiday Display Solar Field Powers Historic Garden Holiday Display December 21, 2011 - 2:58pm Addthis This is part of the holiday light display at Longwood Gardens in Pennsylvania's Brandwine Valley. This year, they commissioned an American-made 1.2 megawatt, 10.7-acre solar field as part of their goal to generate three megawatts of renewable energy by 2018. | Photo courtesy of Longwood Gardens/W. Hill This is part of the holiday light display at Longwood Gardens in Pennsylvania's Brandwine Valley. This year, they commissioned an American-made 1.2 megawatt, 10.7-acre solar field as part of their goal to generate three megawatts of renewable energy by 2018. | Photo courtesy of Longwood Gardens/W. Hill Kristin Swineford Communication Specialist, Weatherization and Intergovernmental Programs

29

A Rising Star: Solid-State Lighting | Department of Energy  

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

A Rising Star: Solid-State Lighting A Rising Star: Solid-State Lighting A Rising Star: Solid-State Lighting June 16, 2009 - 5:00am Addthis John Lippert Just when consumers started getting familiar with the spiral ice-cream cone-shaped and prong-shaped compact fluorescents (CFLs), along comes LED lighting, a solid-state lighting (SSL) solution. Some experts are predicting that solid-state lighting is set to turn the current lighting industry on its head, and perhaps in the not-too-distant future make the century-old incandescent light bulb go the way of the dinosaur. Many consumers have been saving money and helping the environment for years by using LED lights during the holidays. These light strings use 75% less energy than conventional (i.e., incandescent) light strings. ENERGY STAR decorative light strings are independently tested to meet strict lifetime

30

A Rising Star: Solid-State Lighting | Department of Energy  

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

A Rising Star: Solid-State Lighting A Rising Star: Solid-State Lighting A Rising Star: Solid-State Lighting June 16, 2009 - 5:00am Addthis John Lippert Just when consumers started getting familiar with the spiral ice-cream cone-shaped and prong-shaped compact fluorescents (CFLs), along comes LED lighting, a solid-state lighting (SSL) solution. Some experts are predicting that solid-state lighting is set to turn the current lighting industry on its head, and perhaps in the not-too-distant future make the century-old incandescent light bulb go the way of the dinosaur. Many consumers have been saving money and helping the environment for years by using LED lights during the holidays. These light strings use 75% less energy than conventional (i.e., incandescent) light strings. ENERGY STAR decorative light strings are independently tested to meet strict lifetime

31

Countdown to the Thanksgiving Holiday  

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

Food Safety While Hiking, Camping Food Safety While Hiking, Camping & Boating Food Safety Information United States Department of Agriculture Food Safety and Inspection Service USDA Photo Countdown to the Thanksgiving Holiday A s Thanksgiving approaches, cooking the traditional turkey dinner gives rise to anxieties and questions. What kind of turkey should I buy? Should I buy a frozen turkey or a fresh one? How do I store my turkey? A few simple steps will not only ease your holiday fears, but will ensure a delicious and a safe meal for you, your family, and your friends. The following information may help you prepare your special Thanksgiving meal and help you countdown to the holiday. Plan Ahead Plan your menu several weeks before the holiday. Shopping early will ease the countdown tension for

32

Helping make the holidays happier  

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

Helping Make The Holidays Happier Helping Make The Holidays Happier Community Connections: Our link to Northern New Mexico Communities Latest Issue:Dec. 2013 - Jan. 2014 All Issues » submit Helping make the holidays happier This year's LANL food drive collected enough donations to provide 11,600 meals for those in need. January 1, 2013 dummy image Read our archives Contacts Editor Linda Anderman Email Community Programs Office Kurt Steinhaus Email The contributions by employees included 164 turkeys that added up to a total of 8,700 pounds of food. This year's LANL food drive collected enough donations to provide 11,600 meals for those in need. The contributions by Lab employees and contractors included 164 turkeys that added up to a total of 8,700 pounds of food. The Laboratory employees' and contractors' food donations were distributed

33

Winter and Holiday Safety  

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

Source: American Academy of Orthopedic Surgeons HOME HOME HOME HOME Do not drink and decorate. Inspect, properly set up, and position ladders. Use a step stool instead of furniture. Be mindful of rearranged furniture. Minimize clutter. LUGGAGE LUGGAGE LUGGAGE LUGGAGE Pack light. Use proper lifting techniques. Do not rush when lifting or carrying heavy suitcases or packages. Take care when placing luggage in overhead compartments. WINTER SPORTS WINTER SPORTS WINTER SPORTS WINTER SPORTS Warm up muscles. Wear appropriate protective gear. Know and abide by winter sports rules. Keep equipment in good working condition and use properly. If you or someone else experiences hypothermia, immediately seek shelter and medical attention.

34

Covariant Closed String Coherent States  

Science Conference Proceedings (OSTI)

We give the first construction of covariant coherent closed string states, which may be identified with fundamental cosmic strings. We outline the requirements for a string state to describe a cosmic string, and provide an explicit and simple map that relates three different descriptions: classical strings, light cone gauge quantum states, and covariant vertex operators. The resulting coherent state vertex operators have a classical interpretation and are in one-to-one correspondence with arbitrary classical closed string loops.

Hindmarsh, Mark; Skliros, Dimitri [Department of Physics and Astronomy, University of Sussex, Brighton, East Sussex BN1 9QH (United Kingdom)

2011-02-25T23:59:59.000Z

35

Office of Science CFC Holiday Bake Sale | Department of Energy  

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

Office of Science CFC Holiday Bake Sale Office of Science CFC Holiday Bake Sale Office of Science CFC Holiday Bake Sale December 5, 2012 11:30AM to 1:30PM EST GTN Cafeteria Buy...

36

Your Holidays...Brought to You by Fuel Cells - Energy ...  

Your Holidays...Brought to You by Fuel Cells. December 20, 2013. A story about how fuel cells are helping bring the holidays to you is currently ...

37

Memorial Day Weekend Sales Tax Holiday for Energy-Efficient Products |  

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

Memorial Day Weekend Sales Tax Holiday for Energy-Efficient Memorial Day Weekend Sales Tax Holiday for Energy-Efficient Products Memorial Day Weekend Sales Tax Holiday for Energy-Efficient Products < Back Eligibility General Public/Consumer Savings Category Heating & Cooling Cooling Commercial Heating & Cooling Appliances & Electronics Commercial Lighting Lighting Maximum Rebate Air conditioners: price of less than $6,000; Refrigerators: price of less than $2,000; No limit on total purchases. Program Info Start Date 05/2008 State Texas Program Type Sales Tax Incentive Rebate Amount 100% of sales and use tax (6.25% - 8.25% depending on local jurisdiction) Provider Comptroller of Public Accounts Purchases of certain energy-efficient products during Memorial Day weekend are exempt from the state sales and use tax.* This amounts to a three-day

38

Buying an Appliance this Holiday Season? ENERGY STAR Products...  

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

an Appliance this Holiday Season? ENERGY STAR Products will Save You Money and Energy All Year Buying an Appliance this Holiday Season? ENERGY STAR Products will Save You Money...

39

Sales Tax Holiday for Energy-Efficient Appliances  

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

In November 2007, Maryland enacted legislation creating a sales and use tax "holiday" for certain energy-efficient appliances, beginning in 2011. Under the law, qualifying appliances purchased...

40

Energy Saving Holiday Kitchen Trivia | Department of Energy  

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

Efficiency & Renewable Energy What does this mean for me? Knowing which kitchen appliances are most efficient can save you money this holiday season. Cooking is an important...

Note: This page contains sample records for the topic "holiday light strings" 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

Sales Tax Exemption for Energy-Efficient Products (Sales Tax Holiday) |  

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

Sales Tax Exemption for Energy-Efficient Products (Sales Tax Sales Tax Exemption for Energy-Efficient Products (Sales Tax Holiday) Sales Tax Exemption for Energy-Efficient Products (Sales Tax Holiday) < Back Eligibility Residential Savings Category Heating & Cooling Cooling Commercial Heating & Cooling Appliances & Electronics Commercial Lighting Lighting Program Info Start Date 3/23/2007 Expiration Date 7/1/2017 State Virginia Program Type Sales Tax Incentive Rebate Amount 100% exemption from state sales and use tax Provider Virginia Department of Taxation Virginia allows a four-day sales tax exemption on Energy Star products of $2,500 or less per product, purchased for non-commercial home or personal use. Beginning in 2007, the 100% exemption from the state sales and use tax applies to sales occurring during the four-day period that commencing

42

Holiday Message from the Administrator | National Nuclear Security  

National Nuclear Security Administration (NNSA)

Holiday Message from the Administrator | National Nuclear Security Holiday Message from the Administrator | 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 > Holiday Message from the Administrator Holiday Message from the Administrator Posted By Thomas D'Agostino, NNSA Administrator With the holiday season upon us, I hope you will be able to spend time with

43

Holiday Message from the Administrator | National Nuclear Security  

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

Holiday Message from the Administrator | National Nuclear Security Holiday Message from the Administrator | 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 > Holiday Message from the Administrator Holiday Message from the Administrator Posted By Thomas D'Agostino, NNSA Administrator With the holiday season upon us, I hope you will be able to spend time with

44

Energy Saving Holiday Kitchen Trivia | Department of Energy  

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

Saving Holiday Kitchen Trivia Saving Holiday Kitchen Trivia Energy Saving Holiday Kitchen Trivia November 20, 2012 - 4:08pm Addthis Did you know that your dishwasher can be used as an oven in emergencies? | Photo courtesy of Chris Gunn, NREL. Did you know that your dishwasher can be used as an oven in emergencies? | Photo courtesy of Chris Gunn, NREL. Erik Hyrkas Erik Hyrkas Media Relations Specialist, Office of Energy Efficiency & Renewable Energy What does this mean for me? Knowing which kitchen appliances are most efficient can save you money this holiday season. Cooking is an important part of the holiday season. Food brings people together in ways many material gifts cannot. But with winter temperatures creeping in, electricity savings are something to keep in mind, especially

45

Gravitational Field of a Spinning Cosmic String  

E-Print Network (OSTI)

We study the effect of internal space rotation on the gravitational properties of infinite straight and stationary cosmic string. From the approximate solution of Einsten equations for the spinning Q-lump string we obtain long range gravitational accelleration resembling that of a rotating massive cylindrical shell. We also compute the angular velocity of the inertial frame dragging and the angle of light deflection by the Q-lump string. Matter accretion on to spinning strings can play a role in galaxy formation when the angular velocity times the string width is comparable to the speed of light.

Eugen Simanek

2008-03-02T23:59:59.000Z

46

NNSA Employees give back this holiday season | National Nuclear Security  

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

Employees give back this holiday season | National Nuclear Security Employees give back this holiday season | 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 > NNSA Employees give back this holiday season NNSA Employees give back this holiday season Posted By Office of Public Affairs NNSA celebrates the contributions of the men and women working across the

47

NNSA Employees give back this holiday season | National Nuclear...  

National Nuclear Security Administration (NNSA)

recruited volunteers to place wreaths at some of the 44,000 gravesites at the Santa Fe National Cemetery. Nevada Site Office and NSTec gift exchange Holiday Food and Gift Drives...

48

String Solitons  

E-Print Network (OSTI)

We review the status of solitons in superstring theory, with a view to understanding the strong coupling regime. These {\\it solitonic} solutions are non-singular field configurations which solve the empty-space low-energy field equations (generalized, whenever possible, to all orders in $\\alpha'$), carry a non-vanishing topological "magnetic" charge and are stabilized by a topological conservation law. They are compared and contrasted with the {\\it elementary} solutions which are singular solutions of the field equations with a $\\sigma$-model source term and carry a non-vanishing Noether "electric" charge. In both cases, the solutions of most interest are those which preserve half the spacetime supersymmetries and saturate a Bogomol'nyi bound. They typically arise as the extreme mass=charge limit of more general two-parameter solutions with event horizons. We also describe the theory {\\it dual} to the fundamental string for which the roles of elementary and soliton solutions are interchanged. In ten spacetime dimensions, this dual theory is a superfivebrane and this gives rise to a string/fivebrane duality conjecture according to which the fivebrane may be regarded as fundamental in its own right, with the strongly coupled string corresponding to the weakly coupled fivebrane and vice-versa. After compactification to four spacetime dimensions, the fivebrane appears as a magnetic monopole or a dual string according as it wraps around five or four of the compactified dimensions. This gives rise to a four-dimensional string/string duality conjecture which subsumes a Montonen-Olive type duality in that the magnetic monopoles of the fundamental string correspond to the electric winding states of the dual string. This leads to a {\\it duality of dualities} whereby under string/string duality the the strong/weak coupling $S$-duality trades places with the minimum/maximum length $T$-duality. Since these magnetic monopoles are extreme black holes, a prediction of $S$-duality is that the corresponding electric massive states of the fundamental string are also extreme black holes.

M. J. Duff; Ramzi R. Khuri; J. X. Lu

1994-12-22T23:59:59.000Z

49

Energy Efficiency | Department of Energy  

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

STAR Brand December 1, 2009 Save Money with LED Holiday Light Strings LED (or light emitting diode) light strings can use 90% less energy than regular incandescent light strings....

50

The string string theorists forgot to notice  

E-Print Network (OSTI)

A conjecture formulated by Henri Poincare in 1912 suggests that Max Planck's elementary quantum of action constitutes an authentic "atom of motion". When the conjecture is implemented, the resulting entity, the xon, becomes "the string string theorists forgot to notice". If a string exists in Nature, then string theoretical research should be pursued.

Jean-Paul Auffray

2007-11-20T23:59:59.000Z

51

The string string theorists forgot to notice  

E-Print Network (OSTI)

A conjecture formulated by Henri Poincare in 1912 suggests that Max Planck's elementary quantum of action constitutes an authentic "atom of motion". When the conjecture is implemented, the resulting entity, the xon, becomes "the string string theorists forgot to notice". If a string exists in Nature, then string theoretical research should be pursued.

Auffray, Jean-Paul

2007-01-01T23:59:59.000Z

52

Fall and Winter Energy-Saving Tips | Department of Energy  

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

for energy-efficient water heating. Lower Your Holiday Lighting Costs Use light-emitting diode -- or "LED" -- holiday light strings to reduce the cost of decorating your home...

53

String Gas Baryogenesis  

E-Print Network (OSTI)

We describe a possible realization of the spontaneous baryogenesis mechanism in the context of extra-dimensional string cosmology and specifically in the string gas scenario.

G. L. Alberghi

2010-02-19T23:59:59.000Z

54

Introduction to String Theory  

E-Print Network (OSTI)

The aim of these notes is to give recent developments in string theory. In particular, we discuss the string spectrums, compactifications, brane physics and dualities.

Belhaj, Adil

2008-01-01T23:59:59.000Z

55

String Gas Baryogenesis  

E-Print Network (OSTI)

We describe a possible realization of the spontaneous baryogenesis mechanism in the context of extra-dimensional string cosmology and specifically in the string gas scenario.

Alberghi, G L

2010-01-01T23:59:59.000Z

56

String (Faden) Theorie  

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

String Theory Ungelste Rtsel String (Faden) Theorie Die heutige Physik kennt gute Theorien wie Quantenmechanik, Relativittstheorie und Gravitation. Aber diese Theorien passen...

57

String gas baryogenesis  

Science Conference Proceedings (OSTI)

We describe a possible realization of the spontaneous baryogenesis mechanism in the context of extra-dimensional string cosmology and specifically in the string gas scenario.

Alberghi, G. L. [Physics Department, Bologna University, I.N.F.N. Bologna (Italy)

2010-05-15T23:59:59.000Z

58

The Static String  

E-Print Network (OSTI)

In this article the quantum fluctuation of a rigid and static string is reported to be identical to a free quantum particle. Solutions similar to this static string have already been found in the semi-classical quantizaton of pulsating strings, and our results show that the semi-classical quantization of pulsating strings is, in some cases, a perturbation of static strings. We also interpret the energy of the static string as a lower bound for the pulsating string and speculate about a description of quantum mechanics in terms of semi-classical string theory.

Giardino, Sergio

2013-01-01T23:59:59.000Z

59

LED Lights for All Occasions | Department of Energy  

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

Lights for All Occasions Lights for All Occasions LED Lights for All Occasions November 15, 2012 - 1:15pm Addthis With such a variety of lights available, LEDs are a perfect choice for holiday lighting. | Photo courtesy of ©iStockphoto.com/Birzio With such a variety of lights available, LEDs are a perfect choice for holiday lighting. | Photo courtesy of ©iStockphoto.com/Birzio Elizabeth Spencer Communicator, National Renewable Energy Laboratory What does this mean for me? Energy-efficient LED lights can be used to save money while decorating this holiday season. The topic of lighting is no stranger to the Energy Saver blog. And energy-efficient lights--and particularly LEDs--are one of those wonderful things that come up a lot around the holidays, since there are so many wonderful ways to use them. But it's still too early to talk about

60

Shakopee Public Utilities - Residential Energy Efficiency Rebate...  

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

& Electronics Heat Pumps Commercial Lighting Lighting Maximum Rebate CFLs: 5 bulbs LED Holiday Light Stings: 5 strings Program Information Minnesota Program Type Utility...

Note: This page contains sample records for the topic "holiday light strings" 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

Holiday Heights, New Jersey: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

Holiday Heights, New Jersey: Energy Resources Holiday Heights, New Jersey: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 39.9459512°, -74.2540324° 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":39.9459512,"lon":-74.2540324,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

62

Cosmic global strings  

SciTech Connect

This paper discusses the following topics: Global Strings; The Gravitational field of a straight global string; How do global strings behave The axion cosmological energy density; Computer simulations of the motion and decay of global strings; and Electromagnetic radiation from the conversion of Nambu-Goldstone bosons in astrophysical magnetic fields.

Sikivie, P. (Florida Univ., Gainesville, FL (USA). Dept. of Physics)

1990-01-01T23:59:59.000Z

63

EM Waste Isolation Pilot Plant Team's Holiday Spirit Shines | Department  

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

EM Waste Isolation Pilot Plant Team's Holiday Spirit Shines EM Waste Isolation Pilot Plant Team's Holiday Spirit Shines EM Waste Isolation Pilot Plant Team's Holiday Spirit Shines December 23, 2013 - 12:00pm Addthis Aspen Cass, a relative of an EM Carlsbad Field Office (CBFO) employee, holds donated coats with Farok Sharif (left), president and project manager of Nuclear Waste Partnership, the WIPP management and operating contractor, and Joe Franco, manager of CBFO. Aspen Cass, a relative of an EM Carlsbad Field Office (CBFO) employee, holds donated coats with Farok Sharif (left), president and project manager of Nuclear Waste Partnership, the WIPP management and operating contractor, and Joe Franco, manager of CBFO. The clothing drive’s organizers — Margaret Gee (left), Yolanda Navarrete (center) and Dana Dorr — hold up some of the donated coats before providing them to Carlsbad area schools. Gee is with CBFO and Navarrete and Dorr are with Nuclear Waste Partnership (NWP). NWP's Yolanda Salmon, another drive organizer, is not pictured.

64

String Gas Cosmology  

E-Print Network (OSTI)

String gas cosmology is a string theory-based approach to early universe cosmology which is based on making use of robust features of string theory such as the existence of new states and new symmetries. A first goal of string gas cosmology is to understand how string theory can effect the earliest moments of cosmology before the effective field theory approach which underlies standard and inflationary cosmology becomes valid. String gas cosmology may also provide an alternative to the current standard paradigm of cosmology, the inflationary universe scenario. Here, the current status of string gas cosmology is reviewed.

Brandenberger, Robert H

2009-01-01T23:59:59.000Z

65

Lectures on String Theory  

E-Print Network (OSTI)

This is a one semester course on bosonic string theory aimed at beginning graduate students. The lectures assume a working knowledge of quantum field theory and general relativity. Contents: 1. The Classical String 2. The Quantum String 3. Open Strings and D-Branes 4. Introducing Conformal Field Theory 5. The Polyakov Path Integral and Ghosts 6. String Interactions 7. The Low-Energy Effective Action 8. Compactification and T-Duality

Tong, David

2009-01-01T23:59:59.000Z

66

Buying an Appliance this Holiday Season? ENERGY STAR Products will Save You  

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

Buying an Appliance this Holiday Season? ENERGY STAR Products will Buying an Appliance this Holiday Season? ENERGY STAR Products will Save You Money and Energy All Year! Buying an Appliance this Holiday Season? ENERGY STAR Products will Save You Money and Energy All Year! December 12, 2012 - 11:40am Addthis When shopping for appliances or electronics for the holidays, look for the ENERGY STAR® and EnergyGuide labels. | Photo by Dennis Schroeder, NREL 22090. When shopping for appliances or electronics for the holidays, look for the ENERGY STAR® and EnergyGuide labels. | Photo by Dennis Schroeder, NREL 22090. Erin Connealy Communications Specialist, Office of Energy Efficiency and Renewable Energy How can I participate? Look for the ENERGY STAR® label to find energy-efficient appliances. It's the holiday season, which is a perfect time to find a great deal on

67

SRR Staff Send the Holidays to Soldiers Overseas | Department of Energy  

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

SRR Staff Send the Holidays to Soldiers Overseas SRR Staff Send the Holidays to Soldiers Overseas SRR Staff Send the Holidays to Soldiers Overseas December 21, 2012 - 11:49am Addthis Staffers fill holiday boxes for soldiers overseas. Staffers fill holiday boxes for soldiers overseas. A request for razors from a U.S. Army private serving in Afghanistan transformed into a full-scale holiday gift rescue operation by employees of the Savannah River Site's liquid waste contractor, Savannah River Remediation (SRR). The soldier's stepmom helped rally the "troops" in her office to send him and other soldiers some Christmas cheer. "My stepson's unit is responsible for protecting an Army base far from any city and in a mountainous area of Afghanistan," the SRR Finance and Business Administration employee told her colleagues. "We would get

68

Buying an Appliance this Holiday Season? ENERGY STAR Products will Save You  

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

Buying an Appliance this Holiday Season? ENERGY STAR Products will Buying an Appliance this Holiday Season? ENERGY STAR Products will Save You Money and Energy All Year! Buying an Appliance this Holiday Season? ENERGY STAR Products will Save You Money and Energy All Year! December 12, 2012 - 11:40am Addthis When shopping for appliances or electronics for the holidays, look for the ENERGY STAR® and EnergyGuide labels. | Photo by Dennis Schroeder, NREL 22090. When shopping for appliances or electronics for the holidays, look for the ENERGY STAR® and EnergyGuide labels. | Photo by Dennis Schroeder, NREL 22090. Erin Connealy Communications Specialist, Office of Energy Efficiency and Renewable Energy How can I participate? Look for the ENERGY STAR® label to find energy-efficient appliances. It's the holiday season, which is a perfect time to find a great deal on

69

How do You Save Energy During the Holidays? | Department of Energy  

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

do You Save Energy During the Holidays? do You Save Energy During the Holidays? How do You Save Energy During the Holidays? December 20, 2011 - 9:03am Addthis Between family vacations, shopping, and cooking extravagant meals, energy conservation isn't usually at the top our list of things to do during the holiday season. But there are plenty of ways to save money & energy even now by doing little - and even fun - things to reduce our utility bills and use less energy overall. This week, Amanda showed us how she saves money and avoids single-use wrapping paper by creatively wrapping Christmas presents in found items such as grocery ads, magazine pages, and used packing paper. Saving doesn't have to stop there - you can also reduce your energy use during the holidays by: Following some of our past holiday kitchen cooking tips

70

Cosmological Consequences of String Axions  

E-Print Network (OSTI)

2005 Cosmological Consequences of String Axions ? Ben Kain †for the model independent string axion we consider thefor two additional string axions. We do so independent of

Kain, Ben

2005-01-01T23:59:59.000Z

71

From String Nets to Nonabelions  

E-Print Network (OSTI)

Les Houches 1988, Fields, Strings and Critical Phenomena.take: ?rst, cut the degrees of freedom to string nets, thenmake the string nets ?uctuate appropriately to gain isotopy

Fidkowski, Lukasz; Freedman, Michael; Nayak, Chetan; Walker, Kevin; Wang, Zhenghan

2009-01-01T23:59:59.000Z

72

1 String field theory  

E-Print Network (OSTI)

This elementary introduction to string field theory highlights the features and the limitations of this approach to quantum gravity as it is currently understood. String field theory is a formulation of string theory as a field theory in space-time with an infinite number of massive fields. Although existing constructions of string field theory require expanding around a fixed choice of space-time background, the theory is in principle background-independent, in the sense that different backgrounds can be realized as different field configurations in the theory. String field theory is the only string formalism developed so far which, in principle, has the potential to systematically address questions involving multiple asymptotically distinct string backgrounds. Thus, although it is not yet well defined as a quantum theory, string field theory may eventually be helpful for understanding questions related to cosmology in string theory. 1.1

W. Taylor

2006-01-01T23:59:59.000Z

73

Cosmic Strings in Supergravity  

E-Print Network (OSTI)

It is pointed out that various types of cosmic string solutions that exist in nonsupersymmetric and globally supersymmetric theories, such as D-type gauge strings, F-type global and gauge strings, and superconducting Witten strings, also exist in supergravity models. When the D term and superpotential satisfy some simple conditions allowing the determination of a set of vacuum states with nontrivial topology, the existence of a string embedded within a supersymmetric vacuum with vanishing cosmological constant can be inferred. Supergravity also admits other string solutions, some of which have no counterparts in globally supersymmetric theories.

J. R. Morris

1997-06-09T23:59:59.000Z

74

Spin-string interaction in QCD strings  

Science Conference Proceedings (OSTI)

I consider the question of the interaction between a QCD string and the spin of a quark or an antiquark on whose worldline the string terminates. The problem is analyzed from the point of view of a string representation for the expectation value of a Wilson loop for a spin-half particle. A string representation of the super Wilson loop is obtained starting from an effective string representation of a Wilson Loop. The action obtained in this manner is invariant under a worldline supersymmetry and has a boundary term which contains the spin-string interaction. For rectangular loops the spin-string interaction vanishes and there is no spin-spin term in the resulting heavy quark potential. On the other hand if an allowance is made for the finite intrinsic thickness of the flux tube by assuming that the spin-string interaction takes place not just at the boundary of the string world sheet but extends to a distance of the order of the intrinsic thickness of the flux tube then we do obtain a spin-spin interaction which falls as the fifth power of the distance. Such a term was previously suggested by Kogut and Parisi in the context of a flux-tube model of confinement.

Vyas, Vikram [Physics Department St. Stephen's College, Delhi University, Delhi (India)

2008-08-15T23:59:59.000Z

75

Drill string enclosure  

DOE Patents (OSTI)

The drill string enclosure consists of six component parts, including; a top bracket, an upper acrylic cylinder, an acrylic drill casing guide, a lower acrylic cylinder, a bottom bracket, and three flexible ducts. The upper acrylic cylinder is optional based upon the drill string length. The drill string enclosure allows for an efficient drill and sight operation at a hazardous waste site.

Jorgensen, Douglas K. (Idaho Falls, ID); Kuhns, Douglass J. (Idaho Falls, ID); Wiersholm, Otto (Idaho Falls, ID); Miller, Timothy A. (Idaho Falls, ID)

1993-01-01T23:59:59.000Z

76

Drill string enclosure  

DOE Patents (OSTI)

The drill string enclosure consists of six component parts, including; a top bracket, an upper acrylic cylinder, an acrylic drill casing guide, a lower acrylic cylinder, a bottom bracket, and three flexible ducts. The upper acrylic cylinder is optional based upon the drill string length. The drill string enclosure allows for an efficient drill and sight operation at a hazardous waste site.

Jorgensen, D.K.; Kuhns, D.J.; Wiersholm, O.; Miller, T.A.

1993-03-02T23:59:59.000Z

77

Sales Tax Holiday for Energy-Efficient Appliances | Department of Energy  

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

Sales Tax Holiday for Energy-Efficient Appliances Sales Tax Holiday for Energy-Efficient Appliances Sales Tax Holiday for Energy-Efficient Appliances < Back Eligibility General Public/Consumer Savings Category Heating & Cooling Commercial Heating & Cooling Cooling Appliances & Electronics Heating Water Heating Maximum Rebate None, but sale price limited to $1,500 per appliance Program Info Start Date 08/28/2008 State Missouri Program Type Sales Tax Incentive Rebate Amount 100% sales tax exemption Provider Missouri Department of Revenue The state of Missouri offers consumers a seven-day ''exemption from state sales taxes'' on certain Energy Star certified new appliances. The state sales tax holiday, known as the "Show-Me Green Sales Tax Holiday", applies to Energy Star certified appliances up to $1,500 in price intended for

78

Excitation Fields in a Superconducting Global String  

E-Print Network (OSTI)

A model of a straight superconducting global cosmic string is examined in a setting wherein the string supports a charge/current pulse described by a travelling wave along the string. Linearized field equations are obtained for fluctuations of the scalar and vector fields of the theory, and a set of approximate particular solutions are found for the case in which the linear charge density and the current of the string have equal magnitudes. Although the equations of motion seem to suggest that the scalar and vector excitation fields are massive inside the string core, the particular solutions show that they behave as effectively massless fields which propagate at the speed of light along the string along with the primary charge/current pulse. The effect of the mass parameter is to modulate the radial profile of the excitation fields. The vector excitation field generates radial and angular components for both the electric and magnetic fields, but the particular solutions do not describe the emission or absorption of electromagnetic radiation from the string.

J. R. Morris

1995-09-28T23:59:59.000Z

79

Cerenkov radiation from moving straight strings  

E-Print Network (OSTI)

We study Cerenkov radiation from moving straight strings which glisse with respect to each other in such a way that the projected intersection point moves faster than light. To calculate this effect we develop classical perturbation theory for the system of Nambu-Goto strings interacting with dilaton, two-form and gravity. In the first order one encounters divergent self-action terms which are eliminated by classical renormalization of the string tension. Cerenkov radiation arises in the second order. It is generated by an effective source which contains contributions localized on the strings world-sheets and bulk contributions quadratic in the first order fields. In the ultra-relativistic limit radiation exhibits angular peaking on the Cerenkov cone in the forward direction of the fast string in the rest frame of another. The radiation spectrum then extends up to high frequencies proportional to square of the Lorentz-factor of the relative velocity. Gravitational radiation is absent since the 1+2 space-time transverse to the straight string does not allow for gravitons. A rough estimate of the Cerenkov radiation in the cosmological cosmic strings network is presented.

D. V. Gal'tsov; E. Yu. Melkumova; K. Salehi

2006-12-30T23:59:59.000Z

80

Cerenkov radiation from moving straight strings  

Science Conference Proceedings (OSTI)

We study Cerenkov radiation from moving straight strings which slide with respect to each other in such a way that the projected intersection point moves faster than light. To calculate this effect we develop classical perturbation theory for the system of Nambu-Goto strings interacting with the dilaton, two-form, and gravity fields. In the first order, one encounters divergent self-action terms which are eliminated by classical renormalization of the string tension. Cerenkov radiation arises in the second order. It is generated by an effective source which contains contributions localized on the string world sheets and bulk contributions quadratic in the first-order fields. In the ultrarelativistic limit radiation exhibits angular peaking on the Cerenkov cone in the forward direction of the fast string in the rest frame of another. The radiation spectrum then extends up to high frequencies proportional to the square of the Lorentz factor of the relative velocity. Gravitational radiation is absent since the 1+2 space-time transverse to the straight string does not allow for gravitons. A rough estimate of the Cerenkov radiation in the cosmological cosmic strings network is presented.

Gal'tsov, D. V.; Melkumova, E. Yu.; Salehi, K. [Department of Physics, Moscow State University, 119899, Moscow (Russian Federation)

2007-05-15T23:59:59.000Z

Note: This page contains sample records for the topic "holiday light strings" 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

Open-Closed String Correspondence in Open String Field Theory  

E-Print Network (OSTI)

We address the problem of describing different closed string backgrounds in background independent open string field theory: A shift in the closed string background corresponds to a collective excitation of open strings. As an illustration we apply the formalism to the case where the closed string background is a group manifold.

Baumgartl, Marco

2008-01-01T23:59:59.000Z

82

The Committee convened in the Clark Room, Holiday Inn Capitol,  

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

MEETING MEETING - - - Thursday, April 25, 1996 - - - The Committee convened in the Clark Room, Holiday Inn Capitol, 550 C Street, S.W., Washington, D.C., at 9:00 a.m., Dr. Timothy D. Mount, Chairman, presiding. PRESENT: TIMOTHY D. MOUNT, Chairman SAMPRIT CHATTERJEE BRENDA G. COX JOHN D. GRACE CALVIN KENT GRETA M. LJUNG RICHARD A. LOCKHART DANIEL A. RELLES PRESENT (Continued): BRADLEY O. SKARPNESS G. CAMPBELL WATKINS ALSO PRESENT: RENEE MILLER YVONNE BISHOP MARY HUTZLER JAY HAKES DOUGLAS HALE ART HOLLAND ARTHUR RYPINSKI LOUISE GUEY-LEE JOHN CYMBALSKY ERIN BOEDECKER JERRY COFFEY INDER KUNDRA C O N T E N T S PAGE Presentation by Jay Hakes 6 Presentation by Yvonne Bishop 34 Presentation by Art Rypinski 43 Presentation by Richard A. Lockhart 61 Presentation by Douglas Hale 84

83

Handbook on string decay  

E-Print Network (OSTI)

We explain simple semi-classical rules to estimate the lifetime of any given highly-excited quantum state of the string spectrum in flat spacetime. We discuss both the decays by splitting into two massive states and by massless emission. As an application, we study a solution describing a rotating and pulsating ellipse which becomes folded at an instant of time -- the ``squashing ellipse''. This string interpolates between the folded string with maximum angular momentum and the pulsating circular string. We explicitly compute the quantum decay rate for the corresponding quantum state, and verify the basic rules that we propose. Finally, we give a more general (4-parameter) family of closed string solutions representing rotating and pulsating elliptical strings.

Roberto Iengo; Jorge G. Russo

2006-01-11T23:59:59.000Z

84

Texas AgriLife Research Procedure 31.04.01.A1.01 Holidays Page 1 of 1 Texas AgriLife Research Procedures  

E-Print Network (OSTI)

Texas AgriLife Research Procedure 31.04.01.A1.01 Holidays Page 1 of 1 Texas AgriLife Research, work on holidays and religious holidays. Texas AgriLife Research (AgriLife Research) employees located on the Texas A&M University campus in Bryan/ College Station follow the holiday schedule of Texas A

85

Quantum bit string sealing  

E-Print Network (OSTI)

Though it was proven that secure quantum sealing of a single classical bit is impossible in principle, here we propose an unconditionally secure quantum sealing protocol which seals a classical bit string. Any reader can obtain each bit of the sealed string with an arbitrarily small error rate, while reading the string is detectable. The protocol is simple and easy to be implemented. The possibility of using this protocol to seal a single bit in practical is also discussed.

Guang-Ping He

2005-02-15T23:59:59.000Z

86

Drill string enclosure  

DOE Patents (OSTI)

This invention is comprised of a drill string enclosure which consists of six component parts, including; a top bracket, an upper acrylic cylinder, an acrylic drill casing guide, a lower acrylic cylinder, a bottom bracket, and three flexible ducts. The upper acrylic cylinder is optional based upon the drill string length. The drill string enclosure allows for an efficient drill and sight operation at a hazardous waste site.

Jorgensen, D.K.; Kuhns, D.J.; Wiersholm, O.; Miller, T.A.

1992-12-31T23:59:59.000Z

87

String surfaces, string indices and genera of links  

E-Print Network (OSTI)

We show that every link can be presented as a boundary of a flat string surface. We define the string index and the flat string indexes of a link. Then we provide some upperbounds for these string indexes by using braid representatives and canonical Seifert surface. We study the relation between these string indexes and the genera of links. For applications, we calculate the string index of pretzel links.

Kim, Dongseok; Lee, Jaeun

2011-01-01T23:59:59.000Z

88

Property:Incentive/ExpireDtString | Open Energy Information  

Open Energy Info (EERE)

ExpireDtString ExpireDtString Jump to: navigation, search Property Name Incentive/ExpireDtString Property Type String Description Expiration Date string property. Use this property in queries until the Property:Incentive/ExpireDt property is populated with valid dates only. Currently, some are populated with additional notes included. Pages using the property "Incentive/ExpireDtString" Showing 25 pages using this property. (previous 25) (next 25) A AEP Ohio - Commercial Self Direct Rebate Program (Ohio) + 12/15/2013 + AEP Ohio - Renewable Energy Technology Program (Ohio) + 06/30/2013 + Agricultural Biomass to Energy Program (California) + 6/30/04 + Agricultural Energy Efficiency Program (New York) + 12/01/2015 + Agricultural Lighting and Equipment Rebate Program (Vermont) + 06/30/2013 +

89

Rayleigh's Stretched String  

E-Print Network (OSTI)

We obtain rigorous a priori upper and lower bounds to the exact period of the celebrated Rayleigh stretched string differential equation.

Villarino, Mark B

2008-01-01T23:59:59.000Z

90

Preparation of Internationalized Strings ("stringprep")  

Science Conference Proceedings (OSTI)

This document describes a framework for preparing Unicode text strings in order to increase the likelihood that string input and string comparison work in ways that make sense for typical users throughout the world. The stringprep protocol is useful ...

P. Hoffman; M. Blanchet

2002-12-01T23:59:59.000Z

91

String-Corrected Black Holes  

E-Print Network (OSTI)

for black holes and strings, Phys. Rev. D 55, 6189 (1997) [black holes and elementary string states, Mod. Phys. Lett. A= 2 supergravity and Calabi-Yau string back- grounds, Phys.

Hubeny, Veronika

2009-01-01T23:59:59.000Z

92

#tipsEnergy: How to Save Energy During the Holidays | Department...  

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

As part of this month's tipsEnergy, we want to know your tips for saving energy and money during the holiday season. Storified by Energy Department Fri, Dec 21 2012 11:13:01...

93

Your Holidays ... Brought to You by Fuel Cells | Department of Energy  

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

Holidays ... Brought to You by Fuel Cells Holidays ... Brought to You by Fuel Cells Your Holidays ... Brought to You by Fuel Cells December 19, 2013 - 11:44am Addthis Fuel cells, which work like batteries but don’t run down or need recharging, are ideal for powering material handling equipment, like forklifts and airport baggage carts, because they reduce recharging time and cut carbon pollution. This is helping them become more mainstream in the U.S., with more than 4,000 vehicles in operation in 2012, and this year, they might even be helping bring you holidays to you. | Photo courtesy of Plug Power, Inc. Fuel cells, which work like batteries but don't run down or need recharging, are ideal for powering material handling equipment, like forklifts and airport baggage carts, because they reduce recharging time

94

Cut Gas Costs This Holiday Traveling Season with Three Easy Tips |  

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

Cut Gas Costs This Holiday Traveling Season with Three Easy Tips Cut Gas Costs This Holiday Traveling Season with Three Easy Tips Cut Gas Costs This Holiday Traveling Season with Three Easy Tips November 26, 2013 - 9:23am Addthis Turning off your engine while waiting in the parking lot is a great way to save money on gas. | Photo courtesy of Kristy Keel-Blackmon, NREL/21196. Turning off your engine while waiting in the parking lot is a great way to save money on gas. | Photo courtesy of Kristy Keel-Blackmon, NREL/21196. Jason Lutterman Communications Specialist, Office of Energy Efficiency and Renewable Energy How can I participate? Drive smart this holiday season and stay informed with tools such as the speed penalty calculator on fueleconomy.gov. Yesterday you learned from Becky about three tools to help you save on fuel

95

Cut Gas Costs This Holiday Traveling Season with Three Easy Tips |  

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

Cut Gas Costs This Holiday Traveling Season with Three Easy Tips Cut Gas Costs This Holiday Traveling Season with Three Easy Tips Cut Gas Costs This Holiday Traveling Season with Three Easy Tips November 26, 2013 - 9:23am Addthis Turning off your engine while waiting in the parking lot is a great way to save money on gas. | Photo courtesy of Kristy Keel-Blackmon, NREL/21196. Turning off your engine while waiting in the parking lot is a great way to save money on gas. | Photo courtesy of Kristy Keel-Blackmon, NREL/21196. Jason Lutterman Communications Specialist, Office of Energy Efficiency and Renewable Energy How can I participate? Drive smart this holiday season and stay informed with tools such as the speed penalty calculator on fueleconomy.gov. Yesterday you learned from Becky about three tools to help you save on fuel

96

OSTI and Norwood Elementary, holiday buddies for many years | OSTI, US Dept  

Office of Scientific and Technical Information (OSTI)

and Norwood Elementary, holiday buddies for many years and Norwood Elementary, holiday buddies for many years NEWS MEDIA CONTACT: Cathey Daniels, (865) 576-9539 FOR IMMEDIATE RELEASE December 14, 2011 OSTI and Norwood Elementary, holiday buddies for many years The U.S. Department of Energy (DOE) Office of Scientific and Technical Information (OSTI) brightens the holidays for a number of area school children. Since the early 1990s, staff at OSTI have sponsored an Angel Tree Program for students from Norwood Elementary School. This year, each child in the program had three Angels on the OSTI tree. The wrapped gifts were collected and delivered to the Oliver Springs Angel Tree Ministry which distributes the gifts to the children before the winter break. Earlier in December, OSTI collected food items to be distributed to children for their

97

Y-12 employees make holiday merry for local families | National Nuclear  

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

employees make holiday merry for local families | National Nuclear employees make holiday merry for local families | 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 > Y-12 employees make holiday merry for local families Y-12 employees make holiday merry for local families Posted By Office of Public Affairs Nearly 50 Y-12 employees served as Santa's elves in the 2012 Angel Tree

98

Y-12 employees make holiday merry for local families | National Nuclear  

National Nuclear Security Administration (NNSA)

employees make holiday merry for local families | National Nuclear employees make holiday merry for local families | 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 > Y-12 employees make holiday merry for local families Y-12 employees make holiday merry for local families Posted By Office of Public Affairs Nearly 50 Y-12 employees served as Santa's elves in the 2012 Angel Tree

99

Y-12 employees help make holiday merrier for many | Y-12 National...  

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

employees help make ... Y-12 employees help make holiday merrier for many Posted: December 21, 2012 - 9:00am Bicycles and helmets provided by Y-12 workers await distribution to...

100

#tipsEnergy: How to Save Energy During the Holidays | Department...  

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

How to Save Energy During the Holidays Once a month, we ask you to share your energy-saving tips so the larger energy community can learn from you, and we feature some...

Note: This page contains sample records for the topic "holiday light strings" 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

How Do You Save Money on Summer Holidays? | Department of Energy  

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

How Do You Save Money on Summer Holidays? How Do You Save Money on Summer Holidays? How Do You Save Money on Summer Holidays? July 6, 2012 - 6:20pm Addthis Earlier this week, Amanda talked about how you can save money celebrating the 4th of July. She mentioned several ways you can save energy by doing the things you probably did anyway -- like leaving the house or barbequing. But now that the 4th has come and gone, we're curious how you spent yours! Did you find any creative ways to save energy this 4th? You have the chance to share your thoughts on a question about energy efficiency or renewable energy for consumers. E-mail your responses to the Energy Saver team at consumer.webmaster@nrel.gov. Addthis Related Articles Could You Save Money on Your Refrigerator? How do You Save Energy During the Holidays?

102

Crystalline beams: The string  

SciTech Connect

The authors study the possibility of storing a string of charged particles in a magnetic ring. They define the equilibrium configuration, and examine the confinement conditions. Subsequent, they derive the transfer matrix for motion through a drift, a quadrupole, and a dipole. They finally study the stability of the string as the space-charge force is increased.

Haffmans, A.F.; Maletic, D.; Ruggiero, A.G.

1994-04-30T23:59:59.000Z

103

Stable Charged Cosmic Strings  

Science Conference Proceedings (OSTI)

We study the quantum stabilization of a cosmic string by a heavy fermion doublet in a reduced version of the standard model. We show that charged strings, obtained by populating fermionic bound state levels, become stable if the electroweak bosons are coupled to a fermion that is less than twice as heavy as the top quark. This result suggests that extraordinarily large fermion masses or unrealistic couplings are not required to bind a cosmic string in the standard model. Numerically we find the most favorable string profile to be a simple trough in the Higgs vacuum expectation value of radius {approx_equal}10{sup -18} m. The vacuum remains stable in our model, because neutral strings are not energetically favored.

Weigel, H. [Physics Department, Stellenbosch University, Matieland 7602 (South Africa); Quandt, M. [Institute for Theoretical Physics, Tuebingen University, D-72076 Tuebingen (Germany); Graham, N. [Department of Physics, Middlebury College , Middlebury, Vermont 05753 (United States)

2011-03-11T23:59:59.000Z

104

Closed String Cohomology in Open String Field Theory  

E-Print Network (OSTI)

We show that closed string states in bosonic string field theory are encoded in the cyclic cohomology of cubic open string field theory (OSFT) which, in turn, classifies the deformations of OSFT. This cohomology is then shown to be independent of the open string background. Exact elements correspond to closed string gauge transformations, generic boundary deformations of Witten's 3-vertex and infinitesimal shifts of the open string background. Finally it is argued that the closed string cohomology and the cyclic cohomology of OSFT are isomorphic to each other.

Moeller, Nicolas

2010-01-01T23:59:59.000Z

105

QCD String as Vortex String in Seiberg-Dual Theory  

E-Print Network (OSTI)

We construct a classical vortex string solution in a Seiberg-dual theory of N=1 supersymmetric SO(N_c) QCD which flows to a confining phase. We claim that this vortex string is a QCD string, as previouly argued by M.Strassler. In SO(N_c) QCD, it is known that stable QCD strings exist even in the presence of dynamical quarks. We show that our vortex strings are stable in the Seiberg-dual theory.

Eto, Minoru; Terashima, Seiji

2007-01-01T23:59:59.000Z

106

Lighting.  

SciTech Connect

Since lighting accounts for about one-third of the energy used in commercial buildings, there is opportunity to conserve. There are two ways to reduce lighting energy use: modify lighting systems so that they used less electricity and/or reduce the number of hours the lights are used. This booklet presents a number of ways to do both. Topics covered include: reassessing lighting levels, reducing lighting levels, increasing bulb & fixture efficiency, using controls to regulate lighting, and taking advantage of daylight.

United States. Bonneville Power Administration.

1992-09-01T23:59:59.000Z

107

Reheating and Cosmic String Production  

E-Print Network (OSTI)

We compute the string production rate at the end of inflation, using the string spectrum obtained in \\lss in a near-de Sitter space. Our result shows that highly excited strings are hardly produced, thus the simple slow-roll inflation alone does not offer a cosmic string production mechanism.

Chao-Jun Feng; Xian Gao; Miao Li; Wei Song; Yushu Song

2007-07-06T23:59:59.000Z

108

A disintegrating cosmic string  

E-Print Network (OSTI)

We present a simple sandwich gravitational wave of the Robinson-Trautman family. This is interpreted as representing a shock wave with a spherical wavefront which propagates into a Minkowski background minus a wedge. (i.e. the background contains a cosmic string.) The deficit angle (the tension) of the string decreases through the gravitational wave, which then ceases. This leaves an expanding spherical region of Minkowski space behind it. The decay of the cosmic string over a finite interval of retarded time may be considered to generate the gravitational wave.

J. B. Griffiths; P. Docherty

2002-04-29T23:59:59.000Z

109

Black String Flow  

E-Print Network (OSTI)

We give an exact description of the steady flow of a black string into a planar horizon. The event horizon is out of equilibrium and provides a simple, exact instance of a `flowing black funnel' in any dimension D>=5. It is also an approximation to a smooth intersection between a black string and a black hole, in the limit in which the black hole is much larger than the black string thickness. The construction extends easily to more general flows, in particular charged flows.

Emparan, Roberto

2013-01-01T23:59:59.000Z

110

String Phenomenology at the LHC  

E-Print Network (OSTI)

We consider extensions of the standard model based on open strings ending on D-branes, with gauge bosons due to strings attached to stacks of D-branes and chiral matter due to strings stretching between intersecting D-branes. Assuming that the fundamental string mass scale is in the TeV range and the theory is weakly coupled, we review possible signals of string physics at the Large Hadron Collider.

Luis A. Anchordoqui; Haim Goldberg; Dieter Lust; Stephan Stieberger; Tomasz R. Taylor

2009-09-11T23:59:59.000Z

111

Supercritical N = 2 string theory  

E-Print Network (OSTI)

The N=2 string is examined in dimensions above the critical dimension (D=4) in a linear dilaton background. We demonstrate that string states in this background propagate in a single physical time dimension, as opposed to two such dimensions present when the dilaton gradient vanishes in D=4. We also find exact solutions describing dynamical dimensional reduction and transitions from N=2 string theory to bosonic string theory via closed-string tachyon condensation.

Hellerman, Simeon

2007-01-01T23:59:59.000Z

112

Lighting  

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

There are many different types of artificial lights, all of which have different applications and uses. Types of lighting include:

113

Subsurface drill string  

DOE Patents (OSTI)

A drill string comprises a first drill string member having a male end; and a second drill string member having a female end configured to be joined to the male end of the first drill string member, the male end having a threaded portion including generally square threads, the male end having a non-threaded extension portion coaxial with the threaded portion, and the male end further having a bearing surface, the female end having a female threaded portion having corresponding female threads, the female end having a non-threaded extension portion coaxial with the female threaded portion, and the female end having a bearing surface. Installation methods, including methods of installing instrumented probes are also provided.

Casper, William L. (Rigby, ID); Clark, Don T. (Idaho Falls, ID); Grover, Blair K. (Idaho Falls, ID); Mathewson, Rodney O. (Idaho Falls, ID); Seymour, Craig A. (Idaho Falls, ID)

2008-10-07T23:59:59.000Z

114

Compressed String Dictionaries  

E-Print Network (OSTI)

The problem of storing a set of strings --- a string dictionary --- in compact form appears naturally in many cases. While classically it has represented a small part of the whole data to be processed (e.g., for Natural Language processing or for indexing text collections), more recent applications in Web engines, Web mining, RDF graphs, Internet routing, Bioinformatics, and many others, make use of very large string dictionaries, whose size is a significant fraction of the whole data. Thus novel approaches to compress them efficiently are necessary. In this paper we experimentally compare time and space performance of some existing alternatives, as well as new ones we propose. We show that space reductions of up to 20% of the original size of the strings is possible while supporting fast dictionary searches.

Brisaboa, Nieves R; Martínez-Prieto, Miguel A; Navarro, Gonzalo

2011-01-01T23:59:59.000Z

115

Hydroball string sensing system  

DOE Patents (OSTI)

A hydroball string sensing system for a nuclear reactor that includes stainless tubes positioned to guide hydroball strings into and out of the nuclear reactor core. A sensor such as an ultrasonic transducer transmitter and receiver is positioned outside of the nuclear reactor core and adjacent to the tube. The presence of an object such a bullet member positioned at an end a hydroball string, or any one of the hydroballs interrupts the transmission of ultrasound from the transmitter to the receiver. Alternatively, if the bullet member and hydroballs include a ferritic material, either a Hall effect sensor or other magnetic field sensors such as a magnetic field rate of change sensor can be used to detect the location and position of a hydroball string. Placing two sensors along the tube with a known distance between the sensors enables the velocity of a hydroball string to be determined. This determined velocity can be used to control the flow rate of a fluid within the tube so as to control the velocity of the hydroball string.

Hurwitz, Michael J. (Pittsburgh, PA); Ekeroth, Douglas E. (Delmont, PA); Squarer, David (Pittsburgh, PA)

1991-01-01T23:59:59.000Z

116

String operations in orientable open-closed string topology  

E-Print Network (OSTI)

To open-closed cobordism surfaces labeled by closed orientable submanifolds, orientable open-closed string topology associates (degree zero) string operations determined up to sign, which depend only on homeomorphism types of surfaces and which satisfy sewing property. In orientable open-closed string topology, we show that most string operations vanish. We describe those open-closed cobordisms with vanishing string operations, and give a short list of open-closed cobordisms with possibly nontrivial string operations. To prove the above vanishing results, we give a systematic discussion of properties of transfer maps.

Tamanoi, Hirotaka

2008-01-01T23:59:59.000Z

117

North Pole's Holiday Wish for An Energy Efficient 2012 | Department of  

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

North Pole's Holiday Wish for An Energy Efficient 2012 North Pole's Holiday Wish for An Energy Efficient 2012 North Pole's Holiday Wish for An Energy Efficient 2012 December 23, 2011 - 4:20pm Addthis The city of North Pole, Alaska, is hoping to use $100,000 in Energy Efficiency and Conservation Block Grant funds to improve the energy efficiency of several key city facilities.| Photo courtesy of the a href"http://www.northpolefire.org/">North Pole Fire Department. The city of North Pole, Alaska, is hoping to use $100,000 in Energy Efficiency and Conservation Block Grant funds to improve the energy efficiency of several key city facilities.| Photo courtesy of the a href"http://www.northpolefire.org/">North Pole Fire Department. Chris Galm Marketing & Communications Specialist, Office of Energy Efficiency &

118

Sales Tax Holiday for Energy-Efficient Appliances | Department of Energy  

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

Sales Tax Holiday for Energy-Efficient Appliances Sales Tax Holiday for Energy-Efficient Appliances Sales Tax Holiday for Energy-Efficient Appliances < Back Eligibility Multi-Family Residential Residential Savings Category Heating & Cooling Cooling Commercial Heating & Cooling Appliances & Electronics Heat Pumps Program Info Start Date 7/1/2008 State North Carolina Program Type Sales Tax Incentive Rebate Amount 100% sales tax exemption for certain Energy Star appliances Provider N.C. Department of Revenue '''Note: Legislation enacted in June 2011 ([http://www.ncleg.net/enactedlegislation/sessionlaws/html/2011-2012/sl201... S.B. 267]) that removed geothermal heat pumps from the list of energy systems and equipment eligible for this exemption.''' In July 2008, North Carolina enacted legislation establishing a "sales tax

119

Towards open-closed string duality: Closed Strings as Open String Fields  

E-Print Network (OSTI)

We establish a translation dictionary between open and closed strings, starting from open string field theory. Under this correspondence, (off-shell) level-matched closed string states are represented by star algebra projectors in open string field theory. Particular attention is paid to the zero mode sector, which is indispensable in order to generate closed string states with momentum. As an outcome of our identification, we show that boundary states, which in closed string theory represent D-branes, correspond to the identity string field in the open string side. It is to be remarked that closed string theory D-branes are thus given by an infinite superposition of star algebra projectors.

L. Bonora; N. Bouatta; C. Maccaferri

2006-09-26T23:59:59.000Z

120

Analytic progress in open string field theory  

E-Print Network (OSTI)

Open string field theory provides an action functional for open string fields, and it is thus a manifestly off-shell formulation of open string theory. The solutions to the equation of motion of open string field theory ...

Kiermaier, Michael Stefan

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "holiday light strings" 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

Lattice QCD and String Theory  

E-Print Network (OSTI)

Bosonic string formation in gauge theories is reviewed with particular attention to the confining flux in lattice QCD and its string theory description. Recent results on the Casimir energy of the ground state and the string excitation spectrum are analyzed in the Dirichlet string limit of large separation between static sources. The closed string-soliton (torelon) with electric flux winding around a compact dimension and the three-string with a Y-junction created by three static sources are also reviewed. It is shown that string spectra from lattice simulations are consistent with universal predictions of the leading operators from the derivative expansion of a Poincare invariant effective string Lagrangian with reparameterization symmetry. Important characterisitics of the confining flux, like stiffness and the related massive breather modes, are coded in operators with higher derivatives and their determination remains a difficult challenge for lattice gauge theory.

Julius Kuti

2005-11-08T23:59:59.000Z

122

Secure quantum string seal exists  

E-Print Network (OSTI)

It was claimed that all quantum string seals are insecure [H. F. Chau, quant-ph/0602099]. However, here it will be shown that for imperfect quantum string seals, the information obtained by the measurement proposed in that reference is trivial. Therefore imperfect quantum string seals can be unconditionally secure.

Guang Ping He

2006-02-18T23:59:59.000Z

123

How Do You Save Money on Summer Holidays? | Department of Energy  

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

Money on Summer Holidays? Money on Summer Holidays? How Do You Save Money on Summer Holidays? July 6, 2012 - 6:20pm Addthis Earlier this week, Amanda talked about how you can save money celebrating the 4th of July. She mentioned several ways you can save energy by doing the things you probably did anyway -- like leaving the house or barbequing. But now that the 4th has come and gone, we're curious how you spent yours! Did you find any creative ways to save energy this 4th? You have the chance to share your thoughts on a question about energy efficiency or renewable energy for consumers. E-mail your responses to the Energy Saver team at consumer.webmaster@nrel.gov. Addthis Related Articles How do You Save Energy During the Holidays? Could You Save Money on Your Refrigerator? Simple and inexpensive actions can help you save energy and money during the cool fall and winter months. | Photo courtesy of ©iStockphoto.com.

124

They're Here! Winter, Holidays, and the New Year. How Will You Save Energy?  

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

They're Here! Winter, Holidays, and the New Year. How Will You Save They're Here! Winter, Holidays, and the New Year. How Will You Save Energy? They're Here! Winter, Holidays, and the New Year. How Will You Save Energy? December 22, 2009 - 10:11am Addthis Winter officially hit this week, and those of you on the east coast found out in a big way. Many of you are still shoveling out while trying to take care of those last-minute holiday preparations. (I'm actually kind of jealous. I love shoveling snow. I just hate driving in it.) Anyway, I know you're busy, so before you run off to bake more cookies (send me some?), here are some quick energy-related reminders for the next few weeks: Celebrate Efficiently As you're running through your to-do list, don't forget to think about how you can save energy during all of the hustle and bustle. Our entry from

125

Ramp meters on trial: Evidence from the Twin Cities metering holiday  

E-Print Network (OSTI)

Ramp meters on trial: Evidence from the Twin Cities metering holiday David Levinson a,*, Lei Zhang; accepted 15 December 2004 Abstract Ramp meters in the Twin Cities have been the subject of a recent test metering for several representative freeways during the afternoon peak period. Seven performance measures

Levinson, David M.

126

Current balancing for battery strings  

SciTech Connect

A battery plant is described which features magnetic circuit means for balancing the electrical current flow through a pluraliircuitbattery strings which are connected electrically in parallel. The magnetic circuit means is associated with the battery strings such that the conductors carrying the electrical current flow through each of the battery strings pass through the magnetic circuit means in directions which cause the electromagnetic fields of at least one predetermined pair of the conductors to oppose each other. In an alternative embodiment, a low voltage converter is associated with each of the battery strings for balancing the electrical current flow through the battery strings.

Galloway, James H. (New Baltimore, MI)

1985-01-01T23:59:59.000Z

127

Help from the strings  

E-Print Network (OSTI)

"How can the nature of basic particles be defined beyond the mechanisms presiding over their creation? Besides the standard model of particle physics - resulting from the postulations of quantum mechanics - contemporary science has pinned its hopes on the totally new unifying notion provided by the highly mathematical string theory."(2 pages)

2007-01-01T23:59:59.000Z

128

Lighting  

SciTech Connect

The lighting section of ASHRAE standard 90.1 is discussed. It applies to all new buildings except low-rise residential, while excluding specialty lighting applications such as signage, art exhibits, theatrical productions, medical and dental tasks, and others. In addition, lighting for indoor plant growth is excluded if designed to operate only between 10 p.m. and 6 a.m. Lighting allowances for the interior of a building are determined by the use of the system performance path unless the space functions are not fully known, such as during the initial stages of design or for speculative buildings. In such cases, the prescriptive path is available. Lighting allowances for the exterior of all buildings are determined by a table of unit power allowances. A new addition the exterior lighting procedure is the inclusion of facade lighting. However, it is no longer possible to trade-off power allotted for the exterior with the interior of a building or vice versa. A significant change is the new emphasis on lighting controls.

McKay, H.N. (Hayden McKay Lighting Design, New York, NY (US))

1990-02-01T23:59:59.000Z

129

Device for balancing parallel strings  

SciTech Connect

A battery plant is described which features magnetic circuit means in association with each of the battery strings in the battery plant for balancing the electrical current flow through the battery strings by equalizing the voltage across each of the battery strings. Each of the magnetic circuit means generally comprises means for sensing the electrical current flow through one of the battery strings, and a saturable reactor having a main winding connected electrically in series with the battery string, a bias winding connected to a source of alternating current and a control winding connected to a variable source of direct current controlled by the sensing means. Each of the battery strings is formed by a plurality of batteries connected electrically in series, and these battery strings are connected electrically in parallel across common bus conductors.

Mashikian, Matthew S. (Storrs, CT)

1985-01-01T23:59:59.000Z

130

Kolmogorov Complexity, String Information, Panspermia and the Fermi Paradox  

E-Print Network (OSTI)

Bit strings rather than byte files can be a mode of transmission both for intelligent signals and for travels of extraterrestrial life. Kolmogorov complexity, i.e. the minimal length of a binary coded string completely defining a system, can then, due to its universality, become a key concept in the strategy of the search of extraterrestrials. Evaluating, for illustration, the Kolmogorov complexity of the human genome, one comes to an unexpected conclusion that a low complexity compressed string - analog of Noah's ark - will enable the recovery of the totality of terrestrial life. The recognition of bit strings of various complexity up to incompressible Martin-L\\"{o}f random sequences, will require a different strategy for the analysis of the cosmic signals. The Fermi paradox "Where is Everybody?" can be viewed under in the light of such information panspermia, i.e. a Universe full of traveling life streams.

V. G. Gurzadyan

2005-08-01T23:59:59.000Z

131

Exactly Soluble Dynamics of (p,q) String Near Macroscopic Fundamental Strings  

E-Print Network (OSTI)

We study dynamics of Type IIB bound-state of a Dirichlet string and n fundamental strings in the background of N fundamental strings. Because of supergravity potential, the bound-state string is pulled to the background fundamental strings, whose motion is described by open string rolling radion field. The string coupling can be made controllably weak and, in the limit $1 fundamental string constituents.

Dongsu Bak; Soo-Jong Rey; Ho-Ung Yee

2004-11-09T23:59:59.000Z

132

String | Open Energy Information  

Open Energy Info (EERE)

View View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Special page Facebook icon Twitter icon » String Jump to: navigation, search Properties of type "String" Showing 200 properties using this type. (previous 200) (next 200) A Property:Abbreviation Property:Achievement Date Property:Address Property:Agency Property:AlternativeIngredient Property:AreaGeology Property:Audience Property:Author Property:Authority B Property:BLM CaseStatus Property:BLM LeaseStatus Property:Bandwidth(kHz) Property:Beam(m) Property:BrineConstituents Property:Building/Boundaries Property:Building/Category Property:Building/OwnershipCategory Property:Building/SPBreakdownOfElctrcityUseKwhM2AirCompressors Property:Building/SPBreakdownOfElctrcityUseKwhM2CirculationFans

133

Mechanical drill string jar  

SciTech Connect

An improved mechanical drill string jar is described that allows uninhibited telescoping movement to the normal drilling condition. The drill string jar consists of: (a) an elongated, generally cylindrical, body usable as a drill string element; (b) axial motion resistance means situated in the annular opening; (c) bias means operatively associated with at least one element of the splined pair to rotate the pair out of alignment when the splined pair is rotationally disengaged; (d) opposed cooperating surfaces on at least two of the spline teeth situated such that forced axial relative motion of the splined pair will produce opposed radial forces on the teeth; (e) means intrinsic to at least one element of the splined pair to permit resisted radial displacement of the spline teeth when forced axial relative motion occurs, to permit one element to move axially through the other; (f) cam surfaces on at least one of the teeth situated to force rotational alignment of the splined pair when telescoping movement is from a jarring condition toward the normal drilling condition; (g) relative rotation resistance means situated in the annular opening, structurally engaged with the pair of telescoping members such that relative rotation therebetween will be resisted; (h) striker and anvil means situated in the annular opening, operatively associated with the telescoping pair of elements, such that axial relative movement therebetween will be solidly stopped at the axial extreme condition; (i) a flow-through fluid channel means extending between the means to attach to the continuing drill string; and (j) seal means situated in the annular opening, operatively associated with the telescoping pair of members, to provide fluid tightness therebetween.

Buck, D.A.

1987-08-25T23:59:59.000Z

134

Quantum String Seal Is Insecure  

E-Print Network (OSTI)

A quantum string seal encodes the value of a (bit) string as a quantum state in such a way that everyone can extract a non-negligible amount of available information on the string by a suitable measurement. Moreover, such measurement must disturb the quantum state and is likely to be detected by an authorized verifier. In this way, the intactness of the encoded quantum state plays the role of a wax seal in the digital world. Here I analyze the security of quantum string seal by studying the information disturbance tradeoff of a measurement. This information disturbance tradeoff analysis extends the earlier results of Bechmann-Pasquinucci et al. and Chau by concluding that all quantum string seals are insecure. Specifically, I find a way to obtain non-trivial available information on the string that escapes the verifier's detection with at least 50% chance.

H. F. Chau

2006-02-13T23:59:59.000Z

135

Cosmic string induced CMB maps  

SciTech Connect

We compute maps of CMB temperature fluctuations seeded by cosmic strings using high resolution simulations of cosmic strings in a Friedmann-Robertson-Walker universe. We create full-sky, 18 deg. and 3 deg. CMB maps, including the relevant string contribution at each resolution from before recombination to today. We extract the angular power spectrum from these maps, demonstrating the importance of recombination effects. We briefly discuss the probability density function of the pixel temperatures, their skewness, and kurtosis.

Landriau, M. [Max-Planck-Institut fuer extraterrestrische Physik, Giessenbachstrasse 1, 85748 Garching (Germany); Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Centre for Mathematical Sciences, Wilberforce Road, Cambridge CB3 0WA (United Kingdom); Shellard, E. P. S. [Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Centre for Mathematical Sciences, Wilberforce Road, Cambridge CB3 0WA (United Kingdom)

2011-02-15T23:59:59.000Z

136

Physics of String Flux Compactifications  

E-Print Network (OSTI)

We provide a qualitative review of flux compactifications of string theory, focusing on broad physical implications and statistical methods of analysis.

Frederik Denef; Michael R. Douglas; Shamit Kachru

2007-01-06T23:59:59.000Z

137

Semiclassical computation of three-point functions of closed string vertex operators in AdS{sub 5}xS{sup 5}  

Science Conference Proceedings (OSTI)

We consider the leading large string tension correction to correlation functions of three vertex operators of particular massive string states in AdS{sub 5}xS{sup 5} string theory. We assume that two of these states are 'heavy' carrying large spins (of order string tension) and thus can be treated semiclassically while the third state is 'light' having fixed quantum numbers. We study several examples. In the case when the 'heavy' states are described by a folded string with large-spin in AdS{sub 5} the 3-point function scales as a semiclassical spin parameter of the 'heavy' state in power of the string level of the 'light' massive string state. We observe similar behavior in the case of 'heavy' states which admit a small angular momentum limit, which may thus represent creatures of three quantum massive string states.

Roiban, R. [Department of Physics, Pennsylvania State University, University Park, Pennsylvania 16802 (United States); Tseytlin, A. A. [Blackett Laboratory, Imperial College, London SW7 2AZ (United Kingdom)

2010-11-15T23:59:59.000Z

138

R-parity from the heterotic string  

E-Print Network (OSTI)

parity from the heterotic string ? arXiv:hep-th/0412079 v1 7weakly interacting heterotic string, T-duality invariant e?SM). The heterotic string is perturbatively invariant [5

Gaillard, Mary K.

2004-01-01T23:59:59.000Z

139

The SSC Full Cell Prototype String Test  

E-Print Network (OSTI)

and power testing of a string of 50 mm aperture dipoleThe SSC Full Cell Prototype String Test A.D. McInturff, P.The SSC Full Cell Prototype String Test P. Kraushaar, W.

McInturff, A.D.

2011-01-01T23:59:59.000Z

140

Categorified Symplectic Geometry and the Classical String  

E-Print Network (OSTI)

and extended objects in string theory. http://arxiv.org/abs/Witten, E. : Anomalies in string theory with D-branes. AsianGeometry and the Classical String 26. Kalb, M. , Ramond,

Baez, John C.; Hoffnung, Alexander E.; Rogers, Christopher L.

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "holiday light strings" 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

String Field Equations from Generalized Sigma Model  

E-Print Network (OSTI)

I I . i LBNL-39854 String Field Equations fromU C B - P T H - 9 7 / 0 3 String F i e l d Equations fromnew approach for deriving the string field equations from a

Bardakci, K.

2010-01-01T23:59:59.000Z

142

String Correction for Baryon Orbital Excitations  

E-Print Network (OSTI)

The correction to the string junction three-quark potential in a baryon due to the proper moment of inertia of the QCD string is calculated. The magnitudes of the string corrections in P-wave heavy baryons are estimated.

Driga, O N; Veselov, A I

2010-01-01T23:59:59.000Z

143

String Scattering Amplitudes in High Energy Limits  

E-Print Network (OSTI)

A very review of string scattering amplitudes in two important high energy limits: hard scattering and Regge scattering. Recent results of the symmetries in string theory by studying high energy string scattering anplitudes are showed.

Yang, Yi

2011-01-01T23:59:59.000Z

144

Seeking String Theory in the Cosmos  

E-Print Network (OSTI)

We review the existence, formation and properties of cosmic strings in string theory, the wide variety of observational techniques that are being employed to detect them, and the constraints that current observations impose on string theory models.

Copeland, Edmund J; Vachaspati, Tanmay

2011-01-01T23:59:59.000Z

145

Kahler stabilized, modular invariant heterotic string models  

E-Print Network (OSTI)

from the heterotic string. II,” [arXiv:hep-th/0606187]. 82.mediated SUSY breaking from a string theory perspective,” [Modular Invariant Heterotic String Models a 168. K. R.

Gaillard, Mary K.

2008-01-01T23:59:59.000Z

146

String field theory and tachyon condensation  

E-Print Network (OSTI)

In this thesis I discuss various aspects of Witten's cubic string field theory. After a brief review of the basics of string field theory we begin by showing how string field theory can be used to check certain conjectures ...

Ellwood, Ian Thomas, 1977-

2004-01-01T23:59:59.000Z

147

The Particle Adventure | Unsolved Mysteries | String theory  

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

String theory String theory Modern physics has good theories for quantum mechanics, relativity, and gravity. But these theories do not quite work with each other. There are...

148

String deformations induced by retardation effects  

E-Print Network (OSTI)

The rotating string model is an effective model of mesons, in which the quark and the antiquark are linked by a straight string. We previously developed a new framework to include the retardation effects in the rotating string model, but the string was still kept straight. We now go a step further and show that the retardation effects cause a small deviation of the string from the straight line. We first give general arguments constraining the string shape. Then, we find analytical and numerical solutions for the string deformation induced by retardation effects. We finally discuss the influence of the curved string on the energy spectrum of the model.

F. Buisseret; V. Mathieu; C. Semay

2006-05-30T23:59:59.000Z

149

Drill string gas data  

DOE Green Energy (OSTI)

Data and supporting documentation were compiled and analyzed for 26 cases of gas grab samples taken during waste-tank core sampling activities between September 1, 1995 and December 31, 1997. These cases were tested against specific criteria to reduce uncertainties associated with in-tank sampling location and conditions. Of the 26 possible cases, 16 qualified as drill-string grab samples most likely to represent recently released waste gases. The data from these 16 ``confirmed`` cases were adjusted to remove non-waste gas contributions from core-sampling activities (argon or nitrogen purge), the atmospheric background, and laboratory sampler preparation (helium). The procedure for subtracting atmospheric, laboratory, and argon purge gases was unambiguous. No reliable method for determining the exact amount of nitrogen purge gas was established. Thus, the final set of ``Adjusted`` drill string gas data for the 6 nitrogen-purged cases had a greater degree of uncertainty than the final results for the 10 argon-purged cases. Including the appropriate amounts of uncertainty, this final set of data was added to the set of high-quality results from the Retained Gas Sampler (RGS), and good agreement was found for the N{sub 2}, H{sub 2}, and N{sub 2}O mole fractions sampled from common tanks. These results indicate that under favorable sampling conditions, Drill-String (DS) grab samples can provide reasonably accurate information about the dominant species of released gas. One conclusion from this set of total gas data is that the distribution of the H{sub 2} mole fractions is bimodal in shape, with an upper bound of 78%.

Siciliano, E.R.

1998-05-12T23:59:59.000Z

150

Topological Insulators and Superconductors from String Theory  

E-Print Network (OSTI)

Topological insulators and superconductors in different spatial dimensions and with different discrete symmetries have been fully classified recently, revealing a periodic structure for the pattern of possible types of topological insulators and supercondutors, both in terms of spatial dimensions and in terms of symmetry classes. It was proposed that K-theory is behind the periodicity. On the other hand, D-branes, a solitonic object in string theory, are also known to be classified by K-theory. In this paper, by inspecting low-energy effective field theories realized by two parallel D-branes, we establish a one-to-one correspondence between the K-theory classification of topological insulators/superconductors and D-brane charges. In addition, the string theory realization of topological insulators and superconductors comes naturally with gauge interactions, and the Wess-Zumino term of the D-branes gives rise to a gauge field theory of topological nature, such as ones with the Chern-Simons term or the $\\theta$-term in various dimensions. This sheds light on topological insulators and superconductors beyond non-interacting systems, and the underlying topological field theory description thereof. In particular, our string theory realization includes the honeycomb lattice Kitaev model in two spatial dimensions, and its higher-dimensional extensions. Increasing the number of D-branes naturally leads to a realization of topological insulators and superconductors in terms of holography (AdS/CFT).

Shinsei Ryu; Tadashi Takayanagi

2010-07-24T23:59:59.000Z

151

Electric drill-string telemetry  

Science Conference Proceedings (OSTI)

We design a numerical algorithm for simulation of low-frequency electric-signal transmission through a drill string. This is represented by a transmission line with varying geometrical and electromagnetic properties versus depth, depending on the characteristics ... Keywords: drill string, low frequency, simulation, transmission line, voltage

José M. Carcione; Flavio Poletto

2003-04-01T23:59:59.000Z

152

Subcritical string and large N QCD  

Science Conference Proceedings (OSTI)

We pursue the possibility of using subcritical string theory in 4 spacetime dimensions to establish a string dual for large N QCD. In particular we study the even G-parity sector of the 4 dimensional Neveu-Schwarz dual resonance model as the natural candidate for this string theory. Our point of view is that the open string dynamics given by this model will determine the appropriate subcritical closed string theory, a tree level background of which should describe the sum of planar multiloop open string diagrams. We examine the one-loop open string diagram, which contains information about the closed string spectrum at weak coupling. Higher loop open string diagrams will be needed to determine closed string interactions. We also analyze the field theory limit of the one-loop open string diagram and recover the correct running coupling behavior of the limiting gauge theory.

Thorn, Charles B. [Institute for Fundamental Theory, Department of Physics, University of Florida, Gainesville Florida 32611 (United States)

2008-10-15T23:59:59.000Z

153

Subcritical String and Large N QCD  

E-Print Network (OSTI)

We pursue the possibility of using subcritical string theory in 4 space-time dimensions to establish a string dual for large N QCD. In particular we study the even G-parity sector of the 4 dimensional Neveu-Schwarz dual resonance model as the natural candidate for this string theory. Our point of view is that the open string dynamics given by this model will {\\it determine} the appropriate subcritical closed string theory, a tree level background of which should describe the sum of planar multi-loop open string diagrams. We examine the one loop open string diagram, which contains information about the closed string spectrum at weak coupling. Higher loop open string diagrams will be needed to determine closed string interactions. We also analyze the field theory limit of the one loop open string diagram and recover the correct running coupling behavior of the limiting gauge theory.

Thorn, Charles B

2008-01-01T23:59:59.000Z

154

Emergence String and Mass Formulas of Hadrons  

E-Print Network (OSTI)

Assume that hadrons are formed from the emergence string. Usual string should possess two moving states: oscillation and rotation, so we propose corresponding potential and the equation of the emergence string, whose energy spectrum is namely the GMO mass formula and its modified accurate mass formula. These are some relations between the string and observable experimental data.

Yi-Fang Chang

2011-07-19T23:59:59.000Z

155

Shortest synchronizing strings for Huffman codes  

Science Conference Proceedings (OSTI)

Most complete binary prefix codes have a synchronizing string, that is a string that resynchronizes the decoder regardless of its previous state. This work presents an upper bound on the length of the shortest synchronizing string for such codes. Two ... Keywords: ?erný conjecture, Finite automaton, Huffman code, Synchronizing string

Marek Tomasz Biskup; Wojciech Plandowski

2009-09-01T23:59:59.000Z

156

The Committee met in the Clark Room in the Holiday Inn Capitol,  

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

FRIDAY FRIDAY APRIL 24, 1998 - - - The Committee met in the Clark Room in the Holiday Inn Capitol, 550 C Street, S.W., Washington, D.C., at 9:00 a.m., Daniel Relles, Chair, presiding. PRESENT: DANIEL RELLES Chair CHARLES BISCHOFF Member CAROL CRAWFORD Member CALVIN KENT Member GRETA M. LJUNG Member POLLY PHIPPS Member SEYMOUR SUDMAN Member ROY WHITMORE Member JAMES HAMMITT Guest I N D E X Page Opening Comments from the Chair 3 Recognizing Previous Judges of the EIA Graphics 4 Contest and Announcing Winners, Jay Hakes EIA Survey Issues: Addressing Declining Budgets 12 Dwight French (EIA) Discussion: Seymour Sudman (ASA) 36 Questions from the Committee 45

157

String Connections and Chern-Simons Theory  

E-Print Network (OSTI)

We present a finite-dimensional and smooth formulation of string structures on spin bundles. It uses trivializations of the Chern-Simons 2-gerbe associated to this bundle. Our formulation is particularly suitable to deal with string connections. We prove that every string structure admits a string connection and that the possible choices form a contractible space. We also provide a new relation between string connections and 3-forms on the base manifold.

Waldorf, Konrad

2009-01-01T23:59:59.000Z

158

Quantization of the Lie Bialgebra of String Topology  

E-Print Network (OSTI)

eld theory interpretation of string topology. Commun. Math.Chas, M. , Sullivan, D. : String topology, http://arXiv.org/M. , Sullivan, D. : Closed string operators in topology

Chen, Xiaojun; Eshmatov, Farkhod; Gan, Wee Liang

2011-01-01T23:59:59.000Z

159

convergence of string-averaging projection schemes for inconsistent ...  

E-Print Network (OSTI)

Aug 4, 2003 ... out proof) an algorithmic scheme which generalizes both the string- ... Projecting along each string is sequential, but the strings are inM.

160

Bosonic String and String Field Theory: a solution using the holomorphic representation  

E-Print Network (OSTI)

In this paper we show that the holomorphic representation is appropriate for description in a consistent way string and string field theories, when the considered number of component fields of the string field is finite. A new Lagrangian for the closed string is obtained and shown to be equivalent to Nambu-Goto's Lagrangian. We give the notion of anti-string, evaluate the propagator for the string field, and calculate the convolution of two of them.

Bollini, C G

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "holiday light strings" 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

Energy Saver Blog | Department of Energy  

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

3, 2009 3, 2009 Have You Used LED Light Strings? This week, you read about LED holiday light strings, which can use 90% less energy than regular incandescent light strings. December 1, 2009 Save Money with LED Holiday Light Strings LED (or light emitting diode) light strings can use 90% less energy than regular incandescent light strings. They also last about ten times longer, are cooler than incandescents (reducing fire hazards), and are more durable. November 30, 2009 Energy Efficiency Can Be at the Top of Your Shopping List I hope your holidays are filled with cool ways to fine-tune your life that will get you closer to the cutting edge of energy efficiency. November 24, 2009 Green Living, Green Technologies: Things to Be Thankful For We live in a time where improvements in technology make it possible to live

162

DOE Science Showcase - Light-emitting Diode (LED) Lighting Research | OSTI,  

Office of Scientific and Technical Information (OSTI)

Science Showcase - Light-emitting Diode (LED) Lighting Research Science Showcase - Light-emitting Diode (LED) Lighting Research Light-emitting diode (LED) lighting is a type of solid-state lighting that uses a semiconductor to convert electricity to light. LED lighting products are beginning to appear in a wide variety of home, business, and industrial products such as holiday lighting, replacement bulbs for incandescent lamps, street lighting, outdoor area lighting and indoor ambient lighting. Over the past decade, LED technology research and development supported by the U.S. Department of Energy (DOE) has yielded impressive improvements in the cost, color performance, light output, efficacy, reliability, lifetime, and manufacturability of LED products and this upward trend is expected to continue. Read about the latest DOE research, the technology behind LEDs,

163

An Exact Bosonization Rule for c=1 Noncritical String Theory  

E-Print Network (OSTI)

We construct a string field theory for c=1 noncritical strings using the loop variables as the string field. We show how one can express the nonrelativistic free fermions which describes the theory, in terms of these string fields.

Ishibashi, N

2007-01-01T23:59:59.000Z

164

Acoustic data transmission through a drill string  

DOE Patents (OSTI)

Acoustical signals are transmitted through a drill string by canceling upward moving acoustical noise and by preconditioning the data in recognition of the comb filter impedance characteristics of the drill string. 5 figs.

Drumheller, D.S.

1988-04-21T23:59:59.000Z

165

String spectra near some null cosmological singularities  

Science Conference Proceedings (OSTI)

We construct cosmological spacetimes with null Kasner-like singularities as purely gravitational solutions with no other background fields turned on. These can be recast as anisotropic plane-wave spacetimes by coordinate transformations. We analyze string quantization to find the spectrum of string modes in these backgrounds. The classical string modes can be solved for exactly in these time-dependent backgrounds, which enables a detailed study of the near-singularity string spectrum, (time-dependent) oscillator masses, and wave functions. We find that for low-lying string modes (finite oscillation number), the classical near-singularity string mode functions are nondivergent for various families of singularities. Furthermore, for any infinitesimal regularization of the vicinity of the singularity, we find a tower of string modes of ultrahigh oscillation number which propagate essentially freely in the background. The resulting picture suggests that string interactions are non-negligible near the singularity.

Madhu, Kallingalthodi [Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400005 (India); Narayan, K. [Chennai Mathematical Institute, SIPCOT IT Park, Padur PO, Siruseri 603103 (India)

2009-06-15T23:59:59.000Z

166

Emerging Neurophysiological Specialization for Letter Strings  

Science Conference Proceedings (OSTI)

In adult readers, printed words and other letter strings activate specialized visual functions within 200 msec, as evident from neurophysiological recordings of brain activity. These fast, specialized responses to letter strings are thought to develop ...

Urs Maurer; Silvia Brem; Kerstin Bucher; Daniel Brandeis

2005-10-01T23:59:59.000Z

167

A Bijective String Sorting Transform  

E-Print Network (OSTI)

Given a string of characters, the Burrows-Wheeler Transform rearranges the characters in it so as to produce another string of the same length which is more amenable to compression techniques such as move to front, run-length encoding, and entropy encoders. We present a variant of the transform which gives rise to similar or better compression value, but, unlike the original, the transform we present is bijective, in that the inverse transformation exists for all strings. Our experiments indicate that using our variant of the transform gives rise to better compression ratio than the original Burrows-Wheeler transform. We also show that both the transform and its inverse can be computed in linear time and consuming linear storage.

Gil, Joseph Yossi

2012-01-01T23:59:59.000Z

168

Deformations of topological open strings  

E-Print Network (OSTI)

Deformations of topological open string theories are described, with an emphasis on their algebraic structure. They are encoded in the mixed bulk-boundary correlators. They constitute the Hochschild complex of the open string algebra – the complex of multilinear maps on the boundary Hilbert space. This complex is known to have the structure of a Gerstenhaber algebra (Deligne theorem), which is also found in closed string theory. Generalising the case of function algebras with a B-field, we identify the algebraic operations of the bulk sector, in terms of the mixed correlators. This gives a physical realisation of the Deligne theorem. We translate to the language of certain operads (spaces of d-discs with gluing) and d-algebras, and comment on generalisations, notably to the AdS/CFT correspondence. The formalism is applied to the topological A-and B-models on the disc

Christiaan Hofman; Whee Ky Ma

2000-01-01T23:59:59.000Z

169

The Committee met in the Columbia Room at the Holiday Inn  

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

Friday, April 21, 1995 - - - The Committee met in the Columbia Room at the Holiday Inn Capitol, 550 C Street S.W., Washington, D.C., at 9:00 a.m., Timothy D. Mount, Chairman, presiding. PRESENT: TIMOTHY D. MOUNT, Chair DAVID R. BELLHOUSE CHARLES W. BISCHOFF BRENDA G. COX FAYE DUCHIN JOHN D. GRACE PHILIP HANSWER CALVIN KENT GRETA M. LJUNG JAMES L. O'BRIEN DANIEL A. RELLES BRADLEY O. SKARPNESS G. CAMPBELL WATKINS A-G-E-N-D-A Page No. Introductory Remarks, TIMOTHY MOUNT, Chairman 3 Announcement of Winners on Contest On 3 Statistical Graphs, LARRY PETTIS Review of Survey Design for Residential Energy Consumption Survey BRENDA COX, Discussant 7 DAVID BELLHOUSE, Discussant 29 Dates for Future Meetings, TIMOTHY MOUNT 42

170

The Committee met in the Columbia Room at the Holiday Inn Capitol,  

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

THURSDAY, THURSDAY, APRIL 20, 1995 The Committee met in the Columbia Room at the Holiday Inn Capitol, 550 C Street, S.W., Washington, D.C., at 9:00 a.m., Timothy D. Mount, Chair, presiding. PRESENT: TIMOTHY D. MOUNT, Chair DAVID R. BELLHOUSE CHARLES W. BISCHOFF BRENDA G. COX FAYE DUCHIN JOHN D. GRACE PHILIP HANSER CALVIN KENT GRETA M. LJUNG JAMES L. O'BRIEN DANIEL A. RELLES BRADLEY O. SKARPNESS G. CAMPBELL WATKINS AGENDA Introductions by Committee Chair . . . . . . . . . 3 Opening Remarks by Administrator . . . . . . . . . 6 Summary of EIA Follow-up on Comments From Previous Meetings, Yvonne Bishop . . . . . . . . 28 Effects of Structural Changes in Industry 1. Electricity Issues Impact on EIA's Data Collection Activities . . 31 Noel Balthasar, Presenter Phil Hanser, Discussant

171

Hotel gets 9-month payback on HVAC project. [Midtown Holiday Inn, Richmond, VA  

SciTech Connect

The Midtown Holiday Inn at Richmond, Virginia, recovered its $45,200 investment in heating and cooling modifications in nine months by reducing energy consumption by 43%. Natural gas use was reduced 48% and electricity 25%, while comfort levels were improved. The retrofit involved replacing the old three-pipe design, which traditionally returns both heating and cooling water and is inefficient during fall and spring when both hot and chill water are needed. A new control strategy keeps the chiller and boiler from working simultaneously by alternating the two on 15-minute cycles. The chiller automatically cuts off when outside air goes below 55/sup 0/F, while the boiler shuts off at 75/sup 0/F. (DCK)

Deans, B.

1982-10-11T23:59:59.000Z

172

The Committee convened in the Clark Room of the Holiday Inn  

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

- - - - - - - - - - COMMITTEE ON ENERGY STATISTICS - - - - - MEETING - - - - - FRIDAY, APRIL 26, 1996 The Committee convened in the Clark Room of the Holiday Inn Capitol, 550 C Street, S.W., Washington, D.C., at 9:00 a.m., DR. TIMOTHY D. MOUNT, Chair, presiding. PRESENT: TIMOTHY D. MOUNT, Chair SAMPRIT CHATTERJEE BRENDA G. COX JOHN D. GRACE CALVIN KENT GRETA M. LJUNG RICHARD A. LOCKHART DANIEL A. RELLES BRADLEY O. SKARPNESS G. CAMPBELL WATKINS ALSO PRESENT: RENEE MILLER YVONNE M. BISHOP DIANE LIQUE L.A. PETTIS JAY HAKES JOHN WOOD GORDON M. KAUFMAN ROY KASS NANCY LEACH I-N-D-E-X Introductory Remarks: Announcement of Winners of the Contest on Graphs and Visuals Displays 3 Restructuring the Oil and Gas Crude Reserves Program (Agenda Item 5) Presenter: John Wood, Office of Oil and Gas 8

173

The Committee met in the Clark Room, Holiday Inn Capitol at 550  

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

PUBLIC MEETING + + + THURSDAY, APRIL 10, 1997 + + + The Committee met in the Clark Room, Holiday Inn Capitol at 550 C Street, S.W., Washington, D.C., at 9:00 a.m., G. Campbell Watkins, Chairman, presiding. PRESENT: G. CAMPBELL WATKINS, Chairman DAVID R. BELLHOUSE CHARLES W. BISCHOFF BRENDA G. COX CAROL A. GOTWAY CRAWFORD CALVIN KENT GRETA M. LJUNG DANIEL A. RELLES BRADLEY O. SKARPNESS PRESENT (Continued): ROY WHITMORE C O N T E N T S PAGE Opening Remarks, Lynda Carlson 10 Update on 1997 Residential Energy Consumption Survey, Mike Laurence 16 The Use of a Variant of Poisson Sampling: Paula Weir 58, 85 David Bellhouse 72 Roy Whitmore 79 Presentation by Administrator Jay Hakes 112 Results of Customer Satisfaction Survey, Colleen Blessing 138 Annual Energy Outlook/Short-term Energy

174

A solution manual for Polchinski's "String Theory"  

E-Print Network (OSTI)

We present detailed solutions to 81 of the 202 problems in J. Polchinski's two-volume textbook "String Theory".

Headrick, Matthew

2008-01-01T23:59:59.000Z

175

Disseminating the Kilogram, No Strings Attached  

Science Conference Proceedings (OSTI)

Disseminating the Kilogram, No Strings Attached. August 24, 2012. ... The impending redefinition of the kilogram presents a weighty dilemma. ...

2013-01-03T23:59:59.000Z

176

A solution manual for Polchinski's "String Theory"  

E-Print Network (OSTI)

We present detailed solutions to 81 of the 202 problems in J. Polchinski's two-volume textbook "String Theory".

Matthew Headrick

2008-12-23T23:59:59.000Z

177

String Corrections To The Riemann Curvature Tensor  

E-Print Network (OSTI)

The string corrections to the Riemann Curvature tensor are found to first order in the string slope parameter, here proportional to $\\g$. This is done for D=10 supergravity, the presumed low energy limit of string theory. We follow the perturbative approach. We also simplify a crucial result in our previous solution.

Bellucci, S

2011-01-01T23:59:59.000Z

178

Transverse structure of the QCD string  

Science Conference Proceedings (OSTI)

The characterization of the transverse structure of the QCD string is discussed. We formulate a conjecture as to how the stress-energy tensor of the underlying gauge theory couples to the string degrees of freedom. A consequence of the conjecture is that the energy density and the longitudinal-stress operators measure the distribution of the transverse position of the string, to leading order in the string fluctuations, whereas the transverse-stress operator does not. We interpret recent numerical measurements of the transverse size of the confining string and show that the difference of the energy and longitudinal-stress operators is a particularly natural probe at next-to-leading order. Second, we derive the constraints imposed by open-closed string duality on the transverse structure of the string. We show that a total of three independent ''gravitational'' form factors characterize the transverse profile of the closed string, and obtain the interpretation of recent effective string theory calculations: the square radius of a closed string of length {beta} defined from the slope of its gravitational form factor, is given by (d-1/2{pi}{sigma})log({beta}/4r{sub 0}) in d space dimensions. This is to be compared with the well-known result that the width of the open string at midpoint grows as (d-1/2{pi}{sigma})log(r/r{sub 0}). We also obtain predictions for transition form factors among closed-string states.

Meyer, Harvey B. [Johannes Gutenberg Universitaet Mainz, Institut fuer Kernphysik, 55099 Mainz (Germany)

2010-11-15T23:59:59.000Z

179

The Feynman $i \\epsilon$ in String Theory  

E-Print Network (OSTI)

The Feynman $i\\varepsilon$ is an important ingredient in defining perturbative scattering amplitudes in field theory. Here we describe its analog in string theory. Roughly one takes the string worldsheet to have Lorentz signature when a string is going on-shell although it has Euclidean signature generically.

Witten, Edward

2013-01-01T23:59:59.000Z

180

Automatic Verification of String Manipulating ProgramsOverview Outline Overview Symbolic String Verification Composite Verification References  

E-Print Network (OSTI)

Is it Vulnerable? We investigate string verification problem and present an automata-based approach for automatic verification of string manipulating programs based on symbolic string analysis. String analysis plays an important role in the security area. For instance, one can detect various web vulnerabilities like SQL Command Injection and Cross Site Scripting (XSS) attacks. Fang Yu, UCSB Automatic Verification of String Manipulating ProgramsOutline

Fang Yu; Cs Guest Leture

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "holiday light strings" 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

Axions as quintessence in string theory  

Science Conference Proceedings (OSTI)

We construct a model of quintessence in string theory based on the idea of axion monodromy as discussed by McAllister, Silverstein and Westphal [L. McAllister, E. Silverstein, and A. Westphal, Phys. Rev. D 82, 046003 (2010)]. In the model, the quintessence field is an axion whose shift symmetry is broken by the presence of 5-branes which are placed in highly warped throats. This gives rise to a potential for the axion field which is slowly varying, even after incorporating the effects of moduli stabilization and supersymmetry breaking. We find that the resulting time dependence in the equation of state of dark energy is potentially detectable, depending on the initial conditions. The model has many very light extra particles which live in the highly warped throats, but these are hard to detect. A signal in the rotation of the CMB polarization can also possibly arise.

Panda, Sudhakar [Harish-Chandra Research Institute, Allahabad 211019 (India); Sumitomo, Yoske; Trivedi, Sandip P. [Tata Institute of Fundamental Research, Mumbai 400005 (India)

2011-04-15T23:59:59.000Z

182

Superconducting Hair on Charged Black String Background  

E-Print Network (OSTI)

Behaviour of Dirac fermions in the background of a charged black string penetrated by an Abelian Higgs vortex is elaborated. One finds the evidence that the system under consideration can support fermion fields acting like a superconducting cosmic string in the sence that a nontrivial Dirac fermion field can be carried by the system in question. The case of nonextremal and extremal black string vortex systems were considered. The influence of electric and Higgs charge, the winding number and the fermion mass on the fermion localization near the black string event horizon was studied. It turned out that the extreme charged black string expelled fermion fields more violently comparing to the nonextremal one.

Lukasz Nakonieczny; Marek Rogatko

2012-01-25T23:59:59.000Z

183

Have You Found Any Energy-Efficient Bargains? | Department of Energy  

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

Found Any Energy-Efficient Bargains? Found Any Energy-Efficient Bargains? Have You Found Any Energy-Efficient Bargains? January 13, 2012 - 11:52am Addthis This week, Elizabeth shared her retail adventures in the clearance section of a store where she picked up some LED light strings at bargain prices. Whether you use them for holidays or every day just because they're irresistibly cheerful, light strings are an excellent example of LED products. LED holiday lights have many advantages over ordinary incandescent lights: Running LED holiday lights on one 6-foot tree for 12 hours per day for 40 days can save 90% or more energy when compared to traditional incandescent holiday lights They last longer; they have an operational life span of roughly 20,000 hours, enough to last for 40 holiday seasons

184

Open Strings on D-Branes and Hagedorn Regime in String Gas Cosmology  

E-Print Network (OSTI)

We consider early time cosmic evolution in string gas cosmology dominated by open strings attached to D-branes. After reviewing statistical properties of open strings in D-brane backgrounds, we use dilaton-gravity equations to determine the string frame fields. Although, there are distinctions in the Hagedorn regime thermodynamics and dilaton coupling as compared to closed strings, it seems difficult to avoid Jeans instability and assume thermal equilibrium simultaneously, which is already a known problem for closed strings. We also examine characteristics of a possible subsequent large radius regime in this setup.

Arslanargin, Ayse

2009-01-01T23:59:59.000Z

185

Bethe Ansaetze for GKP strings  

E-Print Network (OSTI)

Studying the scattering of excitations around a dynamical background has a long history in the context of integrable models. The Gubser-Klebanov-Polyakov string solution provides such a background for the string/gauge correspondence. Taking the conjectured all-loop asymptotic equations for the AdS_4/CFT_3 correspondence as the starting point, we derive the S-matrix and a set of spectral equations for the lowest-lying excitations. We find that these equations resemble closely the analogous equations for AdS_5/CFT_4, which are also discussed in this paper. At large values of the coupling constant we show that they reproduce the Bethe equations proposed to describe the spectrum of the low-energy limit of the AdS_4xCP^3 sigma model.

Benjamin Basso; Adam Rej

2013-06-07T23:59:59.000Z

186

Filter for a drill string  

DOE Patents (OSTI)

A filter for a drill string comprises a perforated receptacle having an open end and a perforated end and first and second mounting surfaces are adjacent the open end. A transmission element is disposed within each of the first and second mounting surfaces. A capacitor may modify electrical characteristics of an LC circuit that comprises the transmission elements. The respective transmission elements are in communication with each other and with a transmission network integrated into the drill string. The transmission elements may be inductive couplers, direct electrical contacts, or optical couplers. In some embodiments of the present invention, the filter comprises an electronic component. The electronic component may be selected from the group consisting of a sensor, a router, a power source, a clock source, a repeater, and an amplifier.

Hall, David R. (Provo, UT); Pixton, David S. (Lehi, UT); Briscoe, Michael (Lehi, UT); McPherson, James (Sandy, UT)

2007-12-04T23:59:59.000Z

187

Acoustical properties of drill strings  

DOE Green Energy (OSTI)

The recovery of petrochemical and geothermal resources requires extensive drilling of wells to increasingly greater depths. Real-time collection and telemetry of data about the drilling process while it occurs thousands of feet below the surface is an effective way of improving the efficiency of drilling operations. Unfortunately, due to hostile down-hole environments, telemetry of this data is an extremely difficult problem. Currently, commercial systems transmit data to the surface by producing pressure pulses within the portion of the drilling mud enclosed in the hollow steel drill string. Transmission rates are between two and four data bits per second. Any system capable of raising data rates without increasing the complexity of the drilling process will have significant economic impact. One alternative system is based upon acoustical carrier waves generated within the drill string itself. If developed, this method would accommodate data rates up to 100 bits per second. Unfortunately, the drill string is a periodic structure of pipe and threaded tool joints, the transmission characteristics are very complex and exhibit a banded and dispersive structure. Over the past forty years, attempts to field systems based upon this transmission method have resulted in little success. This paper examines this acoustical transmission problem in great detail. The basic principles of acoustic wave propagation in the periodic structure of the drill string are examined through theory, laboratory experiment, and field test. The results indicate the existence of frequency bands which are virtually free of attenuation and suitable for data transmission at high bit rates. 9 refs., 38 figs., 2 tabs.

Drumheller, D.S.

1988-08-01T23:59:59.000Z

188

Counting Strings, Wound and Bound  

E-Print Network (OSTI)

We analyze zero mode counting problems for Dirac operators that find their origin in string theory backgrounds. A first class of quantum mechanical models for which we compute the number of ground states arises from a string winding an isometric direction in a geometry, taking into account its energy due to tension. Alternatively, the models arise from deforming marginal bound states of a string winding a circle, and moving in an orthogonal geometry. After deformation, the number of bound states is again counted by the zero modes of a Dirac operator. We count these bound states in even dimensional asymptotically linear dilaton backgrounds as well as in Euclidean Taub-NUT. We show multiple pole behavior in the fugacities keeping track of a U(1) charge. We also discuss a second class of counting problems that arises when these backgrounds are deformed via the application of a heterotic duality transformation. We discuss applications of our results to Appell-Lerch sums and the counting of domain wall bound states.

Sujay K. Ashok; Suresh Nampuri; Jan Troost

2013-02-05T23:59:59.000Z

189

QCD String formation and the Casimir Energy  

E-Print Network (OSTI)

Three distinct scales are identified in the excitation spectrum of the gluon field around a static quark-antiquark pair as the color source separation R is varied. The spectrum, with string-like excitations on the largest length scales of 2-3 fm, provides clues in its rich fine structure for developing an effective bosonic string description. New results are reported from the three-dimensional Z(2) and SU(2) gauge models, providing further insight into the mechanism of bosonic string formation. The precocious onset of string-like behavior in the Casimir energy of the static quark-antiquark ground state is observed below R=1 fm where most of the string eigenmodes do not exist and the few stable excitations above the ground state are displaced. We find no firm theoretical foundation for the widely held view of discovering string formation from high precision ground state properties below the 1 fm scale.

K. Jimmy Juge; J. Kuti; C. Morningstar

2004-01-27T23:59:59.000Z

190

Spacelike Ricci Inheritance Vectors in a Model of String Cloud and String Fluid Stress Tensor  

E-Print Network (OSTI)

We study the consequences of the existence of spacelike Ricci inheritance vectors (SpRIVs) parallel to $x^a$ for model of string cloud and string fluid stress tensor in the context of general relativity. Necessary and sufficient conditions are derived for a spacetime with a model of string cloud and string fluid stress tensor to admit a SpRIV and a SpRIV which is also a spacelike conformal Killing vector (SpCKV). Also, some results are obtained.

H. Baysal; I. Yilmaz

2005-05-02T23:59:59.000Z

191

Gamma Ray Bursts from Ordinary Cosmic Strings  

E-Print Network (OSTI)

We give an upper estimate for the number of gamma ray bursts from ordinary (non-superconducting) cosmic strings expected to be observed at terrestrial detectors. Assuming that cusp annihilation is the mechanism responsible for the bursts we consider strings arising at a GUT phase transition and compare our estimate with the recent BATSE results. Further we give a lower limit for the effective area of future detectors designed to detect the cosmic string induced flux of gamma ray bursts.

R. H. Brandenberger; A. T. Sornborger; M. Trodden

1993-02-12T23:59:59.000Z

192

Free Field Theory as a String Theory?  

E-Print Network (OSTI)

An approach to systematically implement open-closed string duality for free large $N$ gauge theories is summarised. We show how the relevant closed string moduli space emerges from a reorganisation of the Feynman diagrams contributing to free field correlators. We also indicate why the resulting integrand on moduli space has the right features to be that of a string theory on $AdS$.

Rajesh Gopakumar

2004-09-23T23:59:59.000Z

193

RHIC | String Theory Predicts an Experimental Result  

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

Note: This is a February 2009 article written by Glennda Chui that originally appeared in the online publication symmetry breaking. A first: String theory predicts an experimental...

194

Optimization Online - String-Averaging Projected Subgradient ...  

E-Print Network (OSTI)

Aug 29, 2013 ... Optimization Online. String-Averaging Projected Subgradient Methods for Constrained Minimization. Yair Censor(yair ***at*** math.haifa.ac.il)

195

Convergence and Perturbation Resilience of Dynamic String ...  

E-Print Network (OSTI)

Jun 1, 2012 ... Optimization Online. Convergence and Perturbation Resilience of Dynamic String-Averaging Projection Methods. Yair Censor(yair ***at*** ...

196

A 0-1 String Example - CECM  

E-Print Network (OSTI)

help · annotate · Contents Next: Solution Up: No Title Previous: Initializing the Software. A 0-1 String Example. [Annotate] · [Shownotes]. Find the generating ...

197

The Effective Theory of Long Strings  

E-Print Network (OSTI)

We present the low-energy effective theory on long strings in quantum field theory, including a streamlined review of previous literature on the subject. Such long strings can appear in the form of solitonic strings, as in the 4d Abelian Higgs model, or in the form of confining strings, as in Yang-Mills theories. The bottom line is that upon expanding in powers of 1/L the energy levels of long (closed) strings (where L is the length of the string), all the terms up to (and including) order 1/L^5 are universal. We argue that for excited strings in D>3 space-time dimensions there is a universal deviation at order 1/L^5 from the naive formula that is usually used to fit lattice results. For D=3 this naive formula is valid even at order 1/L^5. At order 1/L^7 non-universal terms generically appear in all cases. We explain the physical origin of these results, and illuminate them in three different formulations of the effective action of long strings (the relationships among which we partly clarify). In addition, we corroborate these results by an explicit computation of the effective action on long strings in confining theories which have a gravitational dual. These predictions can be tested by precise simulations of 4d Yang-Mills theory on the lattice.

Ofer Aharony; Zohar Komargodski

2013-02-25T23:59:59.000Z

198

8.251 String Theory for Undergraduates, Spring 2003  

E-Print Network (OSTI)

Introduction to the main concepts of string theory to undergraduates. Since string theory is quantum mechanics of a relativistic string, the foundations of the subject can be explained to students exposed to both special ...

Zwiebach, Barton

199

8.251 String Theory for Undergraduates, Spring 2005  

E-Print Network (OSTI)

Introduction to the main concepts of string theory to undergraduates. Since string theory is quantum mechanics of a relativistic string, the foundations of the subject can be explained to students exposed to both special ...

Zwiebach, Barton

200

Topics in String Duality: D-Branes and Geometry  

E-Print Network (OSTI)

5.3. The Closed StringSUSY Duality . . 5.1. Field Theory 5.2. The String TheoryCalabi-Yau Threefolds . 6.1.1. String duality and Calabi-Yau

Beem, Christopher John

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "holiday light strings" 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

Bosonic and Baryonic String Theory in Quantum Chromodynamics  

Science Conference Proceedings (OSTI)

Bosonic string formation in gauge theories is reviewed with particular attention to the confining flux in lattice QCD and its effective string theory description. Recent results on the Casimir energy of the ground state and the string excitation spectrum are analyzed in the Dirichlet string limit of large separation between static sources. The closed string-soliton (torelon) with electric flux winding around a compact dimension is discussed and a new bound state tower spectrum at baryon string junctions is presented.

Kuti, Julius [Department of Physics, University of California, San Diego, La Jolla, California 92093 (United States)

2007-02-27T23:59:59.000Z

202

On the string solution in the SUSY - Skyrme model  

E-Print Network (OSTI)

In this paper, we have found the string solution in the SUSY Skyrme model. Moreover, the mechanics of decay of SUSY - string was discussed.

Pham Thuc Tuyen; Do Quoc Tuan

2008-03-19T23:59:59.000Z

203

On the String Averaging Method for Sparse Common Fixed Points ...  

E-Print Network (OSTI)

Jul 10, 2008 ... gate a string-averaging algorithmic scheme that favorably handles the ... are special cases of the string-averaging and of the BIP algorithmic ...

204

"Alice" String as Source of the Kerr Spinning Particle  

E-Print Network (OSTI)

Kerr geometry has twofoldedness which can be cured by a truncation of the `negative' sheet of metric. It leads to the models of disk-like sources of the Kerr solution and to a class of disk-like or bag-like models of the Kerr spinning particle. There is an alternative way: to retain the `negative' sheet as the sheet of advanced fields. In this case the source of spinning particle is the Kerr singular ring which can be considered as a twofold "Alice" string. This string can have electromagnetic excitations in the form of traveling waves generating spin and mass of the particle. Model of this sort was suggested in 1974 as a "microgeon with spin". Recent progress in the obtaining of the nonstationary and radiating Kerr solutions enforces us to return to this model and to consider it as a model for the light spinning particles. We discuss here the real and complex Kerr geometry and some unusual properties of the oscillating solutions in the model of "Alice" string source.

Alexander Burinskii

2010-06-07T23:59:59.000Z

205

Heavy ions and string theory  

E-Print Network (OSTI)

We review a selection of recent developments in the application of ideas of string theory to heavy ion physics. Our topics divide naturally into equilibrium and non-equilibrium phenomena. On the non-equilibrium side, we discuss generalizations of Bjorken flow, numerical simulations of black hole formation in asymptotically anti-de Sitter geometries, equilibration in the dual field theory, and hard probes. On the equilibrium side, we summarize improved holographic QCD, extraction of transport coefficients, inclusion of chemical potentials, and approaches to the phase diagram. We close with some possible directions for future research.

Oliver DeWolfe; Steven S. Gubser; Christopher Rosen; Derek Teaney

2013-04-29T23:59:59.000Z

206

From Quantum Mechanics to String Theory  

E-Print Network (OSTI)

From Quantum Mechanics to String Theory Relativity (why it makes sense) Quantum mechanics Extra Dimensions Strings and the Strong Force Thursday, June 4, 2009 #12;The Higgs Mechanism Summary Mechanical Particle Physics General Relativistic Quantum Gravity increasing speed decreasing size increasing

207

Melt dumping in string stabilized ribbon growth  

DOE Patents (OSTI)

A method and apparatus for stabilizing the edge positions of a ribbon drawn from a melt includes the use of wettable strings drawn in parallel up through the melt surface, the ribbon being grown between the strings. A furnace and various features of the crucible used therein permit continuous automatic growth of flat ribbons without close temperature control or the need for visual inspection.

Sachs, Emanuel M. (42 Old Middlesex Rd., Belmont, MA 02178)

1986-12-09T23:59:59.000Z

208

String Gas Cosmology and Non-Gaussianities  

E-Print Network (OSTI)

Recently it has been shown that string gas cosmology, an alternative model of the very early universe which does not involve a period of cosmological inflation, can give rise to an almost scale invariant spectrum of metric perturbations. Here we calculate the non-Gaussianities of the spectrum of cosmological fluctuations in string gas cosmology, and find that these non-Gaussianities depend linearly on the wave number and that their amplitude depends sensitively on the string scale. If the string scale is at the TeV scale, string gas cosmology could lead to observable non-Gaussianities, if it is close to the Planck scale, then the non-Gaussianities on current cosmological scales are negligible.

Bin Chen; Yi Wang; Wei Xue; Robert Brandenberger

2007-12-14T23:59:59.000Z

209

Cosmic String constraints from WMAP and SPT  

E-Print Network (OSTI)

The predictions of the inflationary LCDM paradigm match today's high-precision measurements of the cosmic microwave background anisotropy with remarkable precision. The same data put tight limits on other sources of anisotropy. Cosmic strings are a particularly interesting alternate source to constrain. Strings are topological defects, remnants of inflationary-era physics that persist after the big bang. They are formed in a variety of models of inflation, including popular string theory models such as brane inflation. In this paper, we show that measurements of temperature anisotropy by the South Pole Telescope break a parameter degeneracy in the WMAP data, permitting us to place a strong upper limit on the possible string contribution to the CMB anisotropy: the power sourced by zero-width strings must be <1.75% (95% CL) of the total. In the model we use, this translates to an upper limit on the string tension of Gmu < 1.7x10^{-7}. These limits imply that the best hope for detecting strings in the CMB ...

Dvorkin, Cora; Hu, Wayne

2011-01-01T23:59:59.000Z

210

Apparatus in a drill string  

DOE Patents (OSTI)

An apparatus in a drill string comprises an internally upset drill pipe. The drill pipe comprises a first end, a second end, and an elongate tube intermediate the first and second ends. The elongate tube and the ends comprising a continuous an inside surface with a plurality of diameters. A conformable spirally welded metal tube is disposed within the drill pipe intermediate the ends thereof and terminating adjacent to the ends of the drill pipe. The conformable metal tube substantially conforms to the continuous inside surface of the metal tube. The metal tube may comprise a non-uniform section which is expanded to conform to the inside surface of the drill pipe. The non-uniform section may comprise protrusions selected from the group consisting of convolutions, corrugations, flutes, and dimples. The non-uniform section extends generally longitudinally along the length of the tube.

Hall, David R. (Provo, UT); Dahlgren, Scott (Alpine, UT); Hall, Jr., Tracy H. (Provo, UT); Fox, Joe (Lehi, UT); Pixton, David S. (Provo, UT)

2007-07-17T23:59:59.000Z

211

Thermodynamic nonextensivity in a closed string gas  

E-Print Network (OSTI)

Well known results in string thermodynamics show that there is always a negative specific heat phase in the microcanonical description of a gas of closed free strings whenever there are no winding modes present. We will carefully compute the number of strings in the gas to show how this negative specific heat is related to the fact that the system does not have thermodynamic extensivity. We will also discuss the consequences for a system of having a microcanonical negative specific heat versus the exact result that such a thing cannot happen in any canonical (fixed temperature) description.

Manuel A. Cobas; M. A. R. Osorio; María Suárez

2004-06-04T23:59:59.000Z

212

Note on tachyon moduli and closed strings  

SciTech Connect

The collective behavior of the SL(2,R) covariant brane states of noncritical c=1 string theory, found in a previous work, is studied in the Fermi liquid approximation. It is found that such states mimic the coset WZW model, whereas only by further restrictions one recovers the double-scaling limit which was purported to be equivalent to closed string models. Another limit is proposed, inspired by the tachyon condensation ideas, where the spectrum is the same of two-dimensional string theory. We close by noting some strange connections between vacuum states of the theory in their different interpretations.

Carneiro da Cunha, Bruno [Helsinki Institute of Physics, P.O. Box 64, FIN-00014 University of Helsinki (Finland) and Departamento de Fisica, Universidade Federal de Pernambuco, CEP 53901-970, Recife, Pernambuco (Brazil)

2008-07-15T23:59:59.000Z

213

Thermal history of the string universe  

E-Print Network (OSTI)

Thermal history of the string universe based on the Brandenberger and Vafa's scenario is examined. The analysis thereby provides a theoretical foundation of the string universe scenario. Especially the picture of the initial oscillating phase is shown to be natural from the thermodynamical point of view. A new tool is employed to evaluate the multi state density of the string gas. This analysis points out that the well-known functional form of the multi state density is not applicable for the important region $T \\leq T_H$, and derives a correct form of it.

H. Cateau; K. Sumiyoshi

1992-05-27T23:59:59.000Z

214

Current discontinuities on superconducting cosmic strings  

Science Conference Proceedings (OSTI)

The propagation of current perturbations on superconducting cosmic strings is considered. The conditions for the existence of discontinuities similar to shock waves have been found. The formulas relating the string parameters and the discontinuity propagation speed are derived. The current growth law in a shock wave is deduced. The propagation speeds of shock waves with arbitrary amplitudes are calculated. The reason why there are no shock waves in the case of time-like currents (in the 'electric' regime) is explained; this is attributable to the shock wave instability with respect to perturbations of the string world sheet.

Troyan, E., E-mail: et@iaaru.astronautiko.org; Vlasov, Yu. V. [Moscow Institute of Physics and Technology (Russian Federation)

2011-07-15T23:59:59.000Z

215

String resonances at the Large Hadron Collider  

E-Print Network (OSTI)

The Large Hadron Collider promises to discover new physics beyond the Standard Model. An exciting possibility is the formation of string resonances at the TeV scale. In this article, we show how string resonances may be detected at the LHC in the $pp\\to\\gamma+jet$ channel. Our study is based on event shape variables, missing energy and momentum, maximum transverse momentum of photons and dijet invariant mass. These observables provide interesting signatures which enable us to discriminate string events from the Standard Model background.

Arunava Roy; Marco Cavaglia

2009-02-09T23:59:59.000Z

216

String tension scaling in high-temperature confined SU(N) gauge theories  

Science Conference Proceedings (OSTI)

SU(N) gauge theories, extended with adjoint fermions having periodic boundary conditions, are confining at high temperature for sufficiently light fermion mass m. In the high-temperature confining region, the one-loop effective potential for Polyakov loops has a Z(N)-symmetric confining minimum. String tensions associated with Polyakov loops are calculable in perturbation theory, and display a novel scaling behavior in which higher representations have smaller string tensions than the fundamental representation. In the magnetic sector, the Polyakov loop plays a role similar to a Higgs field, leading to an apparent breaking of SU(N) to U(1){sup N-1}. This in turn yields a dual effective theory where magnetic monopoles give rise to string tensions for spatial Wilson loops. The spatial string tensions arise semiclassically from kink solutions of the dual system. We prove that the spatial string tensions {sigma}{sub k}{sup (s)} associated with each N-ality k are constrained by a rigorous upper bound. This bound is saturated for N=2 and 3, but is insufficient to determine the spatial string tension scaling law for N{>=}4. Lattice simulations indicate that the high-temperature confining region is smoothly connected to the confining region of low-temperature pure SU(N) gauge theory. However, our results show that the string tension scaling behavior of the low-temperature region does not hold for the electric sector in the high-temperature region, and may not hold in the magnetic sector. The predicted change in the behavior of the electric sector should be readily distinguishable in lattice simulations.

Meisinger, Peter N.; Ogilvie, Michael C. [Department of Physics, Washington University, Saint Louis, Missouri 63130 (United States)

2010-01-15T23:59:59.000Z

217

Which LED Lighting Products Would You Consider Trying? | Department of  

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

Which LED Lighting Products Would You Consider Trying? Which LED Lighting Products Would You Consider Trying? Which LED Lighting Products Would You Consider Trying? August 5, 2010 - 7:30am Addthis On Monday, Chris discussed his upcoming project to replace the lighting in his kitchen and family room. Chris is considering LED (light-emitting diode) lighting, especially for his kitchen, where they can be installed under the cabinets. LEDs can also be used for other applications, including task lighting, recessed downlights, and holiday lighting. Which LED lighting products would you consider trying? Or, if you're already using LEDs, what do you think of them? Each Thursday, you have the chance to share your thoughts on a question about energy efficiency or renewable energy for consumers. Please comment with your answers, and also feel free to respond to other comments.

218

Fundamental String (Membrane) Orbiting D5(M5)-branes  

E-Print Network (OSTI)

We study fundamental string (F-string) dynamics near D5-brane in some limits. We find that when the angular momentum of the probe is proportional to string length (l_s) and square root of string coupling constant {g_s}, the F-string lies in its metastable orbit at a finite distance from D5-branes. We further study the metastable orbits of a M2-brane in M5-brane background.

Nayak, Rashmi R

2010-01-01T23:59:59.000Z

219

A Fast and Accurate Thermistor String  

Science Conference Proceedings (OSTI)

A “fast thermistor string” has been built to accommodate the scientific need to accurately monitor internal wave activity in shelf seas and above sloping bottoms in the ocean. The performance of the thermistors and their custom-designed ...

H. van Haren; R. Groenewegen; M. Laan; B. Koster

2001-02-01T23:59:59.000Z

220

String model for spinning quark jets  

Science Conference Proceedings (OSTI)

A string model of quark hadronization, taking the quark spin degree of freedom into account, is proposed. The method for using the model in a Monte-Carlo code for jet generation is given.

Artru, X.; Belghobsi, Z. [Universite de Lyon, CNRS/IN2P3 and Universite Lyon 1, Institut de Physique Nucleaire de Lyon, Laboratoire de Physique Theorique, Universite de Jijel (Algeria)

2012-06-27T23:59:59.000Z

Note: This page contains sample records for the topic "holiday light strings" 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

String field theory and tachyon dynamics  

E-Print Network (OSTI)

In this thesis we present some works done during my doctoral studies. These results focus on two directions. The first one is motivated by tachyon dynamics in open string theory. We calculate the stress tensors for the ...

Yang, Haitang, Ph. D. Massachusetts Institute of Technology

2006-01-01T23:59:59.000Z

222

Open string in a nonrelativistic background  

Science Conference Proceedings (OSTI)

This paper is devoted to the study of the open string description of Wilson loops and quarks in nonrelativistic quantum field theory that are expected to be dual of gravity in Schroedinger space-time.

Kluson, J. [Department of Theoretical Physics and Astrophysics, Faculty of Science, Masaryk University, Kotlarska 2, 611 37, Brno (Czech Republic)

2010-05-15T23:59:59.000Z

223

Effective string theory and QCD scattering amplitudes  

Science Conference Proceedings (OSTI)

QCD string is formed at distances larger than the confinement scale and can be described by the Polchinski-Strominger effective string theory with a nonpolynomial action, which has nevertheless a well-defined semiclassical expansion around a long-string ground state. We utilize modern ideas about the Wilson-loop/scattering-amplitude duality to calculate scattering amplitudes and show that the expansion parameter in the effective string theory is small in the Regge kinematical regime. For the amplitudes we obtain the Regge behavior with a linear trajectory of the intercept (d-2)/24 in d dimensions, which is computed semiclassically as a momentum-space Luescher term, and discuss an application to meson scattering amplitudes in QCD.

Makeenko, Yuri [Institute of Theoretical and Experimental Physics, B. Cheremushkinskaya 25, 117218 Moscow (Russian Federation)

2011-01-15T23:59:59.000Z

224

The pomeron in closed bosonic string theory  

Science Conference Proceedings (OSTI)

We compute the couplings of the pomeron to the first few mass levels of closed bosonic string states in flat space. We recognize the deviation from the linearity of the Regge trajectories in a five dimensional anti De Sitter background.

Fazio, A. R. [Departamento de fisica, Universidad Nacional de Colombia, Ciudad Universitaria, Bogota D.C. (Colombia)

2010-12-22T23:59:59.000Z

225

Dark Energy May Probe String Theory  

E-Print Network (OSTI)

The problem of dark energy arises due to its self-gravitating properties. Therefore explaining vacuum energy may become a question for the realm of quantum gravity, that can be addressed within string theory context. In this talk I concentrate on a recent, string-inspired model, that relies on nonlinear physics of short-distance perturbation modes, for explaining dark energy without any fine-tuning. Dark energy can be observationally probed by its equation of state, w. Different models predict different types of equations of state and string-inspired ones have a time dependent w(z) as their unique signature. Exploring the link between dark energy and string theory may provide indirect evidence for the latter, by means of precision cosmology data.

L. Mersini; M. Bastero-Gil

2002-12-13T23:59:59.000Z

226

Detection of Atmospheric Muon Neutrinos with the IceCube 9-String Detector  

E-Print Network (OSTI)

Neutrinos with the IceCube 9-String Detector A. Achterberg,Neutrinos with the IceCube 9-String Detector The IceCube17 me- ters apart in strings of 60. Strings are arranged on

Achterberg, A.; IceCube Collaboration

2008-01-01T23:59:59.000Z

227

The string of variable density: Further results  

Science Conference Proceedings (OSTI)

We analyze the problem of calculating the solutions and the spectrum of a string with arbitrary density and fixed ends. We build a perturbative scheme which uses a basis of WKB-type functions and obtain explicit expressions for the eigenvalues and eigenfunctions of the string. Using this approach we show that it is possible to derive the asymptotic (high energy) behavior of the string, obtaining explicit expressions for the first three coefficients (the first two can also be obtained with the WKB method). Finally, using an iterative approach we also obtain analytical expressions for the low energy behavior of the eigenvalues and eigenfunctions of a string with rapidly oscillating density, recovering (in a simpler way) results in the literature. - Highlights: > We devise a perturbative approach to finding the modes of a string with arbitrary density. > We obtain explicitly the first three coefficients of the asymptotic high energy expansion. > We apply our findings to a series of examples, obtaining both analytical and numerical results.

Amore, Paolo, E-mail: paolo.amore@gmail.com

2011-09-15T23:59:59.000Z

228

Duality relation between radiation thermodynamics and cosmic string loop thermodynamics  

SciTech Connect

We discuss thermodynamics of electromagnetic radiation, with p=(1/3){rho} and S{proportional_to}T{sup 3}V, and of cosmic string loops, with p=-(1/3){rho} and S{proportional_to}T{sup -3}V, where p stands for pressure, T temperature, {rho} energy density, S entropy, and V volume. We write the thermodynamic formalisms under a common framework that illustrates their formal relationship and allows us to go from one to the other through a smooth transformation. From a microscopic perspective, these relations arise from the energy relations u({lambda})=hc/{lambda} for the photons of electromagnetic radiation, and u(l)=(c{sup 4}/a{sup 2}G)l for cosmic string loops, a being a numerical (dimensionless) constant and {lambda} and l the radiation wavelength and the length of a loop; G, c, and h are the gravitational constant, the speed of light in vacuo, and the Planck constant, respectively. The corresponding thermodynamic behaviors are seen to be connected through a related thermal duality corresponding to the change of T by T*=T{sub c}{sup 2}/T, with T{sub c} a reference temperature related to h, c, and G.

Jou, D. [Departament de Fisica, Universitat Autonoma de Barcelona, 08193 Bellaterra, Catalonia (Spain); Mongiovi, M. S. [Dipartimento di Metodi e Modelli Matematici, Universita di Palermo, 90128 Palermo (Italy); Sciacca, M. [Dipartimento di Sistemi Agro-Ambientali, Universita di Palermo, 90128 Palermo (Italy)

2011-05-15T23:59:59.000Z

229

On Climbing Scalars in String Theory  

E-Print Network (OSTI)

In string models with "brane supersymmetry breaking" exponential potentials emerge at (closed-string) tree level but are not accompanied by tachyons. Potentials of this type have long been a source of embarrassment in flat space, but can have interesting implications for Cosmology. For instance, in ten dimensions the logarithmic slope |V'/V| lies precisely at a "critical" value where the Lucchin--Matarrese attractor disappears while the scalar field is \\emph{forced} to climb up the potential when it emerges from the Big Bang. This type of behavior is in principle perturbative in the string coupling, persists after compactification, could have trapped scalar fields inside potential wells as a result of the cosmological evolution and could have also injected the inflationary phase of our Universe.

E. Dudas; N. Kitazawa; A. Sagnotti

2010-09-04T23:59:59.000Z

230

Cold quark matter, quadratic corrections, and gauge/string duality  

Science Conference Proceedings (OSTI)

We make an estimate of the quadratic correction in the pressure of cold quark matter using gauge/string duality.

Andreev, Oleg [Arnold Sommerfeld Center for Theoretical Physics, LMU-Muenchen, Theresienstrasse 37, 80333 Muenchen (Germany)

2010-04-15T23:59:59.000Z

231

Optimization Online - "Block-Iterative and String-Averaging ...  

E-Print Network (OSTI)

Jul 19, 2009 ... Optimization Online. "Block-Iterative and String-Averaging Projection Algorithms in Proton Computed Tomography Image Reconstruction".

232

Cosmic string collision in cosmological backgrounds  

SciTech Connect

The collisions of cosmic string loops and the dynamics of junction formations in expanding backgrounds are studied. The key parameter controlling the dynamics of junction formation, the cosmic strings zipping and unzipping, is the relative size of the loops compared to the Hubble radius at the time of collision. We study analytically and numerically these processes for large superhorizon size loops, for small subhorizon size loops as well as for loops with the radii comparable to the Hubble radius at the time of collision.

Firouzjahi, Hassan [School of Physics, Institute for Research in Fundamental Sciences (IPM), P.O. Box 19395-5531, Tehran (Iran, Islamic Republic of); Khoeini-Moghaddam, Salomeh [School of Physics, Institute for Research in Fundamental Sciences (IPM), P.O. Box 19395-5531, Tehran (Iran, Islamic Republic of); Department of Physics, Faculty of Science, Tarbiat Mo'allem University, Tehran (Iran, Islamic Republic of); Khosravi, Shahram [Department of Physics, Faculty of Science, Tarbiat Mo'allem University, Tehran (Iran, Islamic Republic of); School of Astronomy, Institute for Research in Fundamental Sciences (IPM), P.O. Box 19395-5531, Tehran (Iran, Islamic Republic of)

2010-06-15T23:59:59.000Z

233

Instantons from Low Energy String Actions  

E-Print Network (OSTI)

We look for instanton solutions in a class of two scalar field gravity models, which includes the low energy string action in four dimensions. In models where the matter field has a potential with a false vacuum, we find that non-singular instantons exist as long as the Dilaton field found in string theory has a potential with a minimum, and provide an example of such an instanton. The class of singular instanton solutions are also examined, and we find that depending on the parameter values, the volume factor of the Euclidean region does not always vanish fast enough at the singularity to make the action finite.

Saffin, P M; Copeland, E J; Mazumdar, Anupam

1998-01-01T23:59:59.000Z

234

On Type II Strings in Two Dimensions  

E-Print Network (OSTI)

We consider type IIA/B strings in two-dimensions and their projection with respect to the nilpotent space-time supercharge. Based on the ground ring structure, we propose a duality between perturbed type II strings and the topological B-model on deformed Calabi-Yau singularities. Depending on the type II spectra, one has either the conifold or the suspended pinch point geometry. Using the corresponding quiver gauge theory, obtained by D-branes wrapping in the resolved suspended pinch point geometry, we propose the all orders perturbative partition function.

Harald Ita; Harald Nieder; Yaron Oz

2005-02-21T23:59:59.000Z

235

String in Horava-Lifshitz gravity  

Science Conference Proceedings (OSTI)

We generalize recent analysis of the dynamics of point particle in Horava-Lifshitz background to the case of string probe when we replace the Hamiltonian constraint of the Polyakov string with the constraint that breaks Lorentz invariance of target space-time. Then, we find corresponding Lagrangian and argue that the world sheet theory is invariant under foliation-preserving diffeomorphism. Finally, we discuss the Hamiltonian dynamics and show that this is well defined on condition that the world sheet lapse function obeys the projectability condition.

Kluson, J. [Faculty of Science, Department of Theoretical Physics and Astrophysics, Masaryk University, Kotlarska 2, 611 37 Brno (Czech Republic)

2010-10-15T23:59:59.000Z

236

Introduction to string theory and conformal field theory  

Science Conference Proceedings (OSTI)

A concise survey of noncritical string theory and two-dimensional conformal field theory is presented. A detailed derivation of a conformal anomaly and the definition and general properties of conformal field theory are given. Minimal string theory, which is a special version of the theory, is considered. Expressions for the string susceptibility and gravitational dimensions are derived.

Belavin, A. A., E-mail: belavin@itp.ac.ru; Tarnopolsky, G. M., E-mail: Hetzif@yandex.r [Russian Academy of Sciences, Landau Institute for Theoretical Physics (Russian Federation)

2010-05-15T23:59:59.000Z

237

Computer simulations of the motion and decay of global strings  

Science Conference Proceedings (OSTI)

Computer simulations have been carried out of the motion and decay of global strings, including spectrum analysis of the energy stored in the scalar field which describes the global string and the radiated Nambu-Goldstone bosons. We simulated relaxing pieces of bent string and collapsing loops. We find, for the string sizes investigated, that the spectrum of field energy hardens rather than softens while the string decays into Nambu-Goldstone radiation. We argue on theoretical grounds that is indeed the most plausible general behaviour. 19 refs., 12 figs.

Hagmann, C.; Sikivie, P.

1990-01-01T23:59:59.000Z

238

Destruction of a metastable string by particle collisions  

Science Conference Proceedings (OSTI)

We calculate the probability of destruction of a metastable string by collisions of the Goldstone bosons, corresponding to the transverse waves on the string. We find a general formula that allows to determine the probability of the string breakup by a collision of arbitrary number of the bosons. We find that the destruction of a metastable string takes place only in collisions of even number of the bosons, and we explicitly calculate the energy dependence of such process in a two-particle collision for an arbitrary relation between the energy and the largest infrared scale in the problem, the length of the critical gap in the string.

Monin, A. K. [University of Minnesota, School of Physics and Astronomy (United States); Voloshin, M. B., E-mail: voloshin@umn.ed [University of Minnesota, William I. Fine Theoretical Physics Institute (United States)

2010-04-15T23:59:59.000Z

239

Cosmic Strings in the Universe: Achievements and prospects of research  

Science Conference Proceedings (OSTI)

Cosmic strings are linear structures of cosmological scales whose search has been actively conducted in recent years. Progress in constructing theoretical models and investigating the properties of cosmic strings and a significant growth of observational resources provide extensive possibilities for the search of such objects by several independent observational methods. These methods include searching for the events of gravitational lensing of distant background sources by strings and searching for the distinctive cosmic micro-wave background anisotropy structures induced by strings. We discuss these techniques and propose the methods of searching for strings oriented toward the latest spacecraft, including the Planck project.

Sazhina, O. S., E-mail: tedeshka@mail.ru; Sazhin, M. V., E-mail: moimaitre@mail.ru [Sternberg Astronomical Institute (Russian Federation)

2011-11-15T23:59:59.000Z

240

Physics research and technology developments of electron string ion sources  

Science Conference Proceedings (OSTI)

The most recent experimental information on electron string phenomenon, such as two step transition to electron string state, stability of e-strings in condition of electron energy recuperation, are described. The new technology developments of electron string ion sources (ESIS) include pulse injection of gaseous species in e-string and its efficient conversion to ion beams, slow ion extraction, ion-ion cooling of heavy ions with CH{sub 4} coolant, and a progress in the construction of the new Joint Institute for Nuclear Research ESIS with 6 T solenoid are briefly considered.

Donets, D. E.; Donets, E. E.; Ramzdorf, A. Yu.; Salnikov, V. V.; Shutov, V. B.; Donets, E. D. [Veksler and Baldin Laboratory of High Energy Physics, Joint Institute for Nuclear Research, Dubna 141980 (Russian Federation); Honma, T.; Noda, K. [National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage, Chiba, 263-8555 (Japan)

2012-02-15T23:59:59.000Z

Note: This page contains sample records for the topic "holiday light strings" 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

Kaluza-Klein and Gauss-Bonnet cosmic strings  

E-Print Network (OSTI)

We make a systematic investigation of stationary cylindrically symmetric solutions to the five-dimensional Einstein and Einstein-Gauss-Bonnet equations. Apart from the five-dimensional neutral cosmic string metric, we find two new exact solutions which qualify as cosmic strings, one corresponding to an electrically charged cosmic string, the other to an extended superconducting cosmic string surrounding a charged core. In both cases, test particles are deflected away from the singular line source. We extend both kinds of solutions to exact multi-cosmic string solutions.

Mustapha Azreg-Ainou; Gérard Clément

1996-03-29T23:59:59.000Z

242

Bosonic (meta)stabilization of cosmic string loops  

E-Print Network (OSTI)

We consider the possibility of a bosonic (meta)stabilization of a cosmic gauge string loop due to the presence of a gas of low mass bosonic particles which become trapped within the string core. This boson gas exerts a pressure which tends to counteract the string tension, allowing a circular string loop to find a finite equilibrium radius, provided that gas particles do not escape the string core. However, high energy bosons do escape, and consequently the loop shrinks and the temperature rises. Estimates indicate that the bosonic stabilization mechanism is ineffective, and the loop is unstable against decay.

J. R. Morris

2013-03-08T23:59:59.000Z

243

D-branes and string field theory  

E-Print Network (OSTI)

In this thesis we study the D-brane physics in the context of Witten's cubic string field theory. We compute first few terms the low energy effective action for the non-abelian gauge field A, from Witten's action. We show ...

Sigalov, Ilya

2006-01-01T23:59:59.000Z

244

The Structure of Cosmic String Wakes  

E-Print Network (OSTI)

The clustering of baryons and cold dark matter induced by a single moving string is analyzed numerically making use of a new three-dimensional Eulerian cosmological hydro code$^{1)}$ which is based on the PPM method to track the baryons and the PIC method to evolve the dark matter particles. A long straight string moving with a speed comparable to $c$ induces a planar overdensity (a``wake"). Since the initial perturbation is a velocity kick towards the plane behind the string and there is no initial Newtonian gravitational line source, the baryons are trapped in the center of the wake, leading to an enhanced baryon to dark matter ratio. The cold coherent flow leads to very low post--shock temperatures of the baryonic fluid. In contrast, long strings with a lot of small-scale structure (which can be described by adding a Newtonian gravitational line source) move slowly and form filamentary objects. The large central pressure due to the gravitational potential causes the baryons to be expelled from the central regions and leads to a relative deficit in the baryon to dark matter ratio. In this case, the velocity of the baryons is larger, leading to high post-shock temperatures.

A. Sornborger; R. Brandenberger; B. Fryxell; K. Olson

1996-08-05T23:59:59.000Z

245

From Quantum Mechanics to String Theory  

E-Print Network (OSTI)

From Quantum Mechanics to String Theory Relativity (why it makes sense) Quantum mechanics) New Particles anti-particles (combining special relativity and quantum mechanics pions (mediator mechanics, implies an infinite tower of negative energy states, rather than a ground state suppose

246

From Quantum Mechanics to String Theory  

E-Print Network (OSTI)

From Quantum Mechanics to String Theory Relativity (why it makes sense) Quantum mechanics, 2009 #12;Quantum Mechanics: Measurement and Uncertainty Thursday, May 7, 2009 #12;Puzzle: The Stern it. Quantum mechanics understanding: the particle exists in a state without definite position

247

String theory and the real world  

Science Conference Proceedings (OSTI)

We live in exciting times for particle physics. The Large Hadron Collider (LHC) at CERN has begun to collect data, and laboratory and satellite experiments are investigating the dark matter of the universe. Another, less appreciated fact increases the excitement. Physicists now have a coherent, consistent theoretical framework to address basic questions about particles, the interactions and forces between them, why they are what they are, and how numerous phenomena are related in a broader picture. That framework is ''string theory''. I put the term in scare quotes because there is not yet a final formulation of the theory. But the lack of a finished picture is not important for my purposes, so in this article I refer to the framework as string theory or M-theory. The perspective that string theory is the underlying framework to address many issues facing particle physics and cosmology is different from the more standard description of it as a consistent quantum theory of gravity. But it is a fruitful way to think about what string theory means.

Kane, Gordon [University of Michigan, Ann Arbor (United States)

2010-11-15T23:59:59.000Z

248

The cohomology structure of string algebras.  

E-Print Network (OSTI)

We show that the graded commutative ring structure of the Hochschild cohomology HH*(A) is trivial in case A is a triangular quadratic string algebra. Moreover, in case A isgentle, the Lie algebra structure on HH*(A) is also trivial.

Juan Carlos Bustamante

249

Black Holes and Solitons in String Theory  

E-Print Network (OSTI)

In this review, I discuss a general method for constructing classical solutions of the equations of motion arising in the effective low energy string theory, and discuss specific applications of this method. (Based on talks given at the Johns Hopkins Workshop held at Goteborg, June 8-10, 1992, and ICTP Summer Workshop held at Trieste, July 2-3, 1992)

Sen, A

1992-01-01T23:59:59.000Z

250

Towards Dark Energy from String-Theory  

E-Print Network (OSTI)

We discuss vacuum energy in string and M-theory with a focus on heterotic M-theory. In the latter theory a mechanism is described for maintaining zero vacuum energy after supersymmetry breaking. Higher-order corrections can be expected to give a sufficiently small amount of vacuum energy to possibly account for dark energy.

Axel Krause

2007-12-31T23:59:59.000Z

251

Smooth crossover transition from the {delta}-string to the Y-string three-quark potential  

Science Conference Proceedings (OSTI)

We comment on the assertion made by Caselle et al.[M. Caselle, G. Delfino, P. Grinza, O. Jahn, and N. Magnoli, J. Stat. Mech. (2006) P008.] that the confining (string) potential for three quarks 'makes a smooth crossover transition from the {delta}-string to the Y-string configuration at interquark distances of around 0.8 fm'. We study the functional dependence of the three-quark confining potentials due to a Y-string, and the {delta} string and show that they have different symmetries, which lead to different constants of the motion (i.e. they belong to different 'universality classes' in the parlance of the theory of phase transitions). This means that there is no 'smooth crossover' between the two, when their string tensions are identical, except at the vanishing hyper-radius. We also comment on a certain two-body potential approximation to the Y-string potential.

Dmitrasinovic, V.; Sato, Toru; Suvakov, Milovan [Vinca Institute of Nuclear Sciences, lab 010, P.O. Box 522, 11001 Beograd (Serbia); Department of Physics, Graduate School of Science, Osaka University, Toyonaka 560-0043 (Japan); Institute of Physics, Pregrevica 118, Zemun, P.O. Box 57, 11080 Beograd (Serbia)

2009-09-01T23:59:59.000Z

252

Correlation classes on the landscape: To what extent is string theory predictive?  

Science Conference Proceedings (OSTI)

In light of recent discussions of the string landscape, it is essential to understand the degree to which string theory is predictive. We argue that it is unlikely that the landscape as a whole will exhibit unique correlations amongst low-energy observables, but rather that different regions of the landscape will exhibit different overlapping sets of correlations. We then provide a statistical method for quantifying this degree of predictivity, and for extracting statistical information concerning the relative sizes and overlaps of the regions corresponding to these different correlation classes. Our method is robust and requires no prior knowledge of landscape properties, and can be applied to the landscape as a whole as well as to any relevant subset.

Dienes, Keith R. [Department of Physics, University of Arizona, Tucson, Arizona 85721 (United States); Lennek, Michael [Centre de Physique Theorique, Ecole Polytechnique, CNRS, F-91128 Palaiseau (France)

2009-11-15T23:59:59.000Z

253

Gauge coupling unification in heterotic string models with gauge mediated supersymmetry breaking  

Science Conference Proceedings (OSTI)

We calculate the weak scale minimal supersymmetric standard model spectrum starting from a heterotic string theory compactified on an anisotropic orbifold. Supersymmetry breaking is mediated by vectorlike exotics that arise naturally in heterotic string theories. The messengers that mediate supersymmetry breaking come in incomplete grand unified theory (GUT) multiplets and give rise to nonuniversal gaugino masses at the GUT scale. Models with nonuniversal gaugino masses at the GUT scale have the attractive feature of allowing for precision gauge coupling unification at the GUT scale with negligible contributions from threshold corrections near the unification scale. The unique features of this minimally supersymmetric standard model spectrum are light gluinos and also large mass differences between the lightest and the next-to-lightest neutralinos and charginos which could lead to interesting signatures at the colliders.

Anandakrishnan, Archana; Raby, Stuart [Department of Physics, Ohio State University, 191, W. Woodruff Ave, Columbus, Ohio 43210 (United States)

2011-04-01T23:59:59.000Z

254

On Water, Steam and String Theory  

E-Print Network (OSTI)

This is a colloquium-style review lecture for physicists and non-physicists, as part of the requirements for ``Habilitation'' at the university of Bern: At a pressure of 220 atm. and a temperature of 374 Celsius there is a second-order phase transition between water and steam. Understanding it requires the concept of the renormalization group. Images from computer simulations of the lattice gas model (included) are used to explain its basic ideas. It is briefly reviewed how the renormalization group is used to compute critical coefficients for the water-steam phase transition, in good agreement with experiment. Applications in particle physics and string theory are mentioned. The appendix contains a sample of the author's results on renormalization group flows in theories with dynamical gravity and their relation to perturbative string theory: gravity modifies critical coefficients and phase diagrams, in agreement with numerical calculations, and leads to curious phenomena such as oscillating flows and quantum mechanical flows.

Christof Schmidhuber

1997-01-22T23:59:59.000Z

255

On Water, Steam and String Theory  

E-Print Network (OSTI)

This is a colloquium-style review lecture for physicists and non-physicists, as part of the requirements for ``Habilitation'' at the university of Bern: At a pressure of 220 atm. and a temperature of 374 Celsius there is a second-order phase transition between water and steam. Understanding it requires the concept of the renormalization group. Images from computer simulations of the lattice gas model (included) are used to explain its basic ideas. It is briefly reviewed how the renormalization group is used to compute critical coefficients for the water-steam phase transition, in good agreement with experiment. Applications in particle physics and string theory are mentioned. The appendix contains a sample of the author's results on renormalization group flows in theories with dynamical gravity and their relation to perturbative string theory: gravity modifies critical coefficients and phase diagrams, in agreement with numerical calculations, and leads to curious phenomena such as oscillating flows and quantu...

Schmidhuber, C

1997-01-01T23:59:59.000Z

256

String orientations of simplicial homology manifolds  

E-Print Network (OSTI)

Simplicial homology manifolds are proposed as an interesting class of geometric objects, more general than topological manifolds but still quite tractable, in which questions about the microstructure of space-time can be naturally formulated. Their string orientations are classified by $H^3$ with coefficients in an extension of the usual group of D-brane charges, by cobordism classes of homology three-spheres with trivial Rokhlin invariant.

Jack Morava

2008-07-11T23:59:59.000Z

257

Thermodynamic potential for compactified bosonic strings  

E-Print Network (OSTI)

We discuss the inclusion of chemical potentials of the Kaluza-Klein charges in the partition function of the bosonic string with a compactified dimension on a circle. The construction of the thermodynamic potential is achieved by the path integral method at one-loop level. Duality symmetry in the dependence on compactification scale is examined. A modular-invariant expression for the thermodynamic potential is also presented.

Kiyoshi Shiraishi

2013-08-06T23:59:59.000Z

258

Dark Energy in Perturbative String Cosmology  

E-Print Network (OSTI)

The apparent observation of dark energy poses problems for string theory. In de Sitter space, or in quintessence models, one cannot define a gauge-invariant S-matrix. We argue that eternal quintessence does not arise in weakly coupled string theory, but point out that it is difficult to define an $S$-matrix even in the presence of perturbative potentials for the moduli. The solutions of the Fischler-Susskind equations all have Big Bang or Big Crunch Singularities. We believe that an S-matrix (or S-vector) exists in this context but cannot be calculated by purely perturbative methods. We study the possibility of metastable de Sitter vacua in such weakly coupled scenarios, and conclude that the S-matrix of the extreme weak coupling region cannot probe de Sitter physics. We also consider proposed explanations of the dark energy from the perspective of string theory, and find that most are implausible. We note that it is possible that the axion constitutes both the dark matter and the dark energy.

Tom Banks; Michael Dine

2001-06-28T23:59:59.000Z

259

Property:Incentive/StartDateString | Open Energy Information  

Open Energy Info (EERE)

StartDateString StartDateString Jump to: navigation, search Property Name Incentive/StartDateString Property Type String Description Start Date string property. Use this property in queries until the Property:Incentive/StartDate property is populated with valid dates only. Currently, some are populated with additional notes included. Pages using the property "Incentive/StartDateString" Showing 25 pages using this property. (previous 25) (next 25) 3 30% Business Tax Credit for Solar (Vermont) + 01/01/2009 + A AEP Appalachian Power - Commercial and Industrial Rebate Programs (West Virginia) + 3/11/2011 + AEP Appalachian Power - Residential Home Retrofit Program (West Virginia) + 3/11/2011 + AEP Ohio - Commercial Self Direct Rebate Program (Ohio) + 1/1/2008 +

260

CMB Anisotropy Induced by a Moving Straight Cosmic String  

E-Print Network (OSTI)

We showed that the part of strings could be detected by optical method is only 20% from the total available amount of such objects, therefore the gravitational lensing method has to be "completed" by CMB one. We found the general structure of the CMB anisotropy generated by a cosmic string for simple model of straight string moving with constant velocity. For strings with deficit angle 1-2 arcsec the amplitude of generated anisotropy has to be 15-30 muK (the corresponding string linear density is (G mu) ~ 10^{-7} and energy is GUT one, 10^{15} GeV). To use both radio and optical methods the deficit angle has to be from 0.1 arcsec to 5-6 arcsec. If cosmic string can be detected by optical method, the length of corresponding brightness spot of anisotropy has to be no less than 100 degrees.

O. S. Sazhina; M. V. Sazhin; V. N. Sementsov; M. Capaccioli; G. Longo; G. Riccio; G. D'Angelo

2008-09-05T23:59:59.000Z

Note: This page contains sample records for the topic "holiday light strings" 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

Non-perturbative String Theory from Water Waves  

Science Conference Proceedings (OSTI)

We use a combination of a 't Hooft limit and numerical methods to find non-perturbative solutions of exactly solvable string theories, showing that perturbative solutions in different asymptotic regimes are connected by smooth interpolating functions. Our earlier perturbative work showed that a large class of minimal string theories arise as special limits of a Painleve IV hierarchy of string equations that can be derived by a similarity reduction of the dispersive water wave hierarchy of differential equations. The hierarchy of string equations contains new perturbative solutions, some of which were conjectured to be the type IIA and IIB string theories coupled to (4, 4k ? 2) superconformal minimal models of type (A, D). Our present paper shows that these new theories have smooth non-perturbative extensions. We also find evidence for putative new string theories that were not apparent in the perturbative analysis.

Iyer, Ramakrishnan; Johnson, Clifford V.; /Southern California U.; Pennington, Jeffrey S.; /SLAC

2012-06-14T23:59:59.000Z

262

Bidirectional Search in a String with Wavelet Trees Thomas Schnattinger  

E-Print Network (OSTI)

Bidirectional Search in a String with Wavelet Trees #12;Wavelet Tree of T = BWT(S) = nle_pl$nnlleee_eaae T[1 Bidirectional Search in a String with Wavelet Trees #12;Wavelet Tree of T = BWT(S) = nle_pl$nnlleee_eaae T[1 Bidirectional Search in a String with Wavelet Trees #12;Wavelet Tree of T = BWT(S) = nle_pl$nnlleee_eaae T[1

Lonardi, Stefano

263

Qualification of a computer program for drill string dynamics  

DOE Green Energy (OSTI)

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

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

1985-01-01T23:59:59.000Z

264

Fine structure constant in the spacetime of a cosmic string  

E-Print Network (OSTI)

We calculate the fine structure constant in the spacetime of a cosmic string. In the presence of a cosmic string the value of the fine structure constant reduces. We also discuss on numerical results. The gravitational properties of cosmic strings are strikingly different from those of non-relativistic linear distributions of matter. To explain the origin of the difference, we note that for a static matter distribution with energymomentum tensor, T µ ? = diag (?, ?p1, ?p2, ?p3) , (1) the Newtonian limit of the Einstein equations become ? 2 ? = 4?G (? + p1 + p2 + p3), (2) where ? is the gravitational potential. For non-relativistic matter, pi ? ? and ? 2 ? = 4?G?. Strings, on the other hand, have a large longitudinal tension. For a straight string parallel to the z-axis, p3 = ??, with p1 and p2 vanish when averaged over the string cross-section. Hence, the righthand side of Eq.(2) vanishes, suggesting that straight strings produce no gravitational forece on surrounding matter. This conclusion is confirmed by a full general-relativistic analysis. Another feature distinguishing cosmic strings from more familiar sources is their relativistic motion. As a result, oscillating loops of string can be strong emitters of gravitational radiation. A gravitating string is described by the combined system of Einstein, Higgs and guage field equations. The problem of solving these coupled equations is formidable and no exact solutions have been found to date. Fortunately, for most cosmological applications the problem can be made tractable by adopting two major simplifications. First, assuming that the string thickness is much smaller than all other relevant dimensions, the string can be 1

Forough Nasseri

2005-01-01T23:59:59.000Z

265

Hamiltonian extension and eigenfunctions for a time dispersive dissipative string  

E-Print Network (OSTI)

We carry out a detailed analysis of a time dispersive dissipative (TDD) string, using our recently developed conservative and Hamiltonian extensions of TDD systems. This analysis of the TDD string includes, in particular: (i) an explicit construction of its conservative Hamiltonian extension, consisting of the physical string coupled to "hidden strings;" (ii) explicit formulas for energy and momentum densities in the extended system, providing a transparent physical picture accounting precisely for the dispersion and dissipation; (iii) the eigenmodes for the extended string system, which provide an eigenmode expansion for solutions to the TDD wave equation governing the TDD string. In particular, we find that in an eigenmode for the extended system the displacement of the physical string does not satisfy the formal eigenvalue problem, but rather an equation with a source term resulting from the excitation of the hidden strings. The obtained results provide a solid basis for the rigorous treatment of the long standing problem of scattering by a TDD scatterer, illustrated here by the computation of scattering states for a string with dissipation restricted to a half line.

Alexander Figotin; Jeffrey Schenker

2006-03-31T23:59:59.000Z

266

The Color Flux Tube as an Effective String  

Science Conference Proceedings (OSTI)

We investigate the low-energy regime of the confining string connecting color sources in Yang-Mills theory. First, we present results of the Monte Carlo measurement of the width of the flux tube between two static quarks in the fundamental representation both at zero and at finite temperature. Then we consider the confining flux tube connecting color sources in larger representations of the gauge group. For stable string - the k-strings - we study the Luscher term; for unstable strings we investigate their decay as the distance between the static sources is increased.

Pepe, Michele [INFN, Sezione di Milano-Bicocca, Edificio U2, Piazza della Scienza 3, 20126 Milano (Italy)

2011-05-24T23:59:59.000Z

267

On the string topology category of compact Lie groups.  

E-Print Network (OSTI)

This paper examines the string topology category of a manifold, defined by Blumberg, Cohen and Teleman. Since the string topology category is a subcategory of a compactly generated triangulated category, the machinery of stratification, constructed by Benson, Krause and Iyengar, can be applied in order to gain an understanding of the string topology category. It is shown that an appropriate stratification holds when the manifold in question is a simply connected compact Lie group. This last result is used to derive some properties of the relevant string topology categories.

Shoham Shamir

268

Zipping and Unzipping of Cosmic String Loops in Collision  

E-Print Network (OSTI)

In this paper the collision of two cosmic string loops is studied. After collision junctions are formed and the loops are entangled. We show that after their formation the junctions start to unzip and the loops disentangle. This analysis provides a theoretical understanding of the unzipping effect observed in numerical simulations of a network of cosmic strings with more than one type of cosmic strings. The unzipping phenomena have important effects in the evolution of cosmic string networks when junctions are formed upon collision, such as in a network of cosmic superstrings.

Hassan Firouzjahi; Johanna Karouby; Shahram Khosravi; Robert Brandenberger

2009-07-28T23:59:59.000Z

269

World Sheet Commuting beta-gamma CFT and Non-Relativistic String Theories  

E-Print Network (OSTI)

Cosmolog- ical uni?cation of string theories,” arXiv:hep-landscape of supercritical string theory,” arXiv:0705.0980 [invariance, supersymmetry and string theory,” Nucl. Phys.

Kim, Bom Soo

2008-01-01T23:59:59.000Z

270

A New Lorentz Violating Nonlocal Field Theory From String-Theory  

E-Print Network (OSTI)

29] J. Polchinski, “String theory. Vol. 2: SuperstringNonlocal Field Theory From String-Theory Ori J. GanorNonlocal Field Theory From String-Theory Ori J. Ganor ?

Ganor, Ori J.

2009-01-01T23:59:59.000Z

271

Closed-String Tachyon Condensation and the Worldsheet Super-Higgs Effect  

E-Print Network (OSTI)

For example, in Type 0 string the- ory in the presence ofClosed-String Tachyon Condensation and the Worldsheet Super-of California. Closed-String Tachyon Condensation and the

Horava, Petr

2008-01-01T23:59:59.000Z

272

Borehole Seismic Monitoring at Otway Using the Naylor-1 Instrument String  

E-Print Network (OSTI)

the Naylor-1 Instrument String April 2009 Thomas M. Daley 1the performance of the seismic string. The moveout of low-the upper section of the string (1420 – 1500 m) but never on

Daley, T.M.

2010-01-01T23:59:59.000Z

273

M-theory through the looking glass: Tachyon condensation in the E8 heterotic string  

E-Print Network (OSTI)

H. Phong, The geometry of string perturbation theory, Rev.solutions of supercritical string theory, hep-th/0611317. [changing exact solutions of string theory, hep-th/0612051. [

Horava, Petr

2008-01-01T23:59:59.000Z

274

String-Inspired Chern-Simons Modified Gravity In 4-Dimensions  

E-Print Network (OSTI)

Chern-Simons modified gravity models in 4-dimensions are shown to be special cases of low energy effective string models to first order in the string constant.

Adak, M

2008-01-01T23:59:59.000Z

275

From Decay to Complete Breaking: Pulling the Strings in SU(2) Yang-Mills Theory  

Science Conference Proceedings (OSTI)

We study (2Q+1) strings connecting two static charges Q in (2+1)D SU(2) Yang-Mills theory. While the fundamental (2) string between two charges Q=(1/2) is unbreakable, the adjoint (3) string connecting two charges Q=1 can break. When a (4) string is stretched beyond a critical length, it decays into a (2) string by gluon pair creation. When a (5) string is stretched, it first decays into a (3) string, which eventually breaks completely. The energy of the screened charges at the ends of a string is well described by a phenomenological constituent gluon model.

Pepe, M. [INFN, Istituto Nazionale di Fisica Nucleare, Sezione di Milano-Bicocca, Edificio U2, Piazza della Scienza 3, 20126 Milano (Italy); Wiese, U.-J. [Center for Research and Education in Fundamental Physics, Institute for Theoretical Physics, Bern University, Sidlerstrasse 5, 3012 Bern (Switzerland); Institute for Theoretical Physics, ETH Zuerich, Schafmattstrasse 32, CH-8093 Zuerich (Switzerland)

2009-05-15T23:59:59.000Z

276

The String Origin of SUSY Flavor Violation  

E-Print Network (OSTI)

We argue that in large classes of string compactifications with a MSSM-like structure substantial flavor violating SUSY-breaking soft terms are generically induced. We specify to the case of flavor dependent soft-terms in type IIB/F-theory SU(5) unified models, although our results can be easily extended to other settings. The Standard Model (SM) degrees of freedom reside in a local system of 7-branes wrapping a 4-fold S in the extra dimensions. It is known that in the presence of closed string 3-form fluxes SUSY-breaking terms are typically generated. We explore the generation dependence of these soft terms and find that non-universalities arise whenever the flux varies over the 4-fold S. These non-universalities are parametrically suppressed by (M_{GUT}/M_{Pl})^{1/3}. They also arise in the case of varying open string fluxes, in this case parametrically suppressed by \\alpha_{GUT}^{1/2}. For a standard unification scheme with M_{GUT} = 10^{16} GeV and \\alpha_{\\rm GUT} = 1/24 these suppressions are very mild. Although limits from the kaon mass difference \\Delta m_K are easily obeyed for squark masses above the present LHC limits, constraints from the CP-violation parameter \\epsilon_K imply squark masses in the multi-TeV region. The constraints from BR(\\mu \\rightarrow e\\gamma) turn out to be the strongest ones, with slepton masses of order ~10 TeV or heavier required to obey the experimental limits. These sfermion masses are consistent with the observed large value m_H ~ 126 GeV of the Higgs mass. We discuss under what conditions such strong limits may be relaxed allowing for SUSY particle production at LHC.

Pablo G. Camara; Luis E. Ibanez; Irene Valenzuela

2013-07-11T23:59:59.000Z

277

String Theory, Universal Mind, and the Paranormal  

E-Print Network (OSTI)

A model consistent with string theory is proposed for so-called paranormal phenomena such as extra-sensory perception (ESP). Our mathematical skills are assumed to derive from a special 'mental vacuum state', whose origin is explained on the basis of anthropic and biological arguments, taking into account the need for the informational processes associated with such a state to be of a life-supporting character. ESP is then explained in terms of shared 'thought bubbles' generated by the participants out of the mental vacuum state. The paper concludes with a critique of arguments sometimes made claiming to 'rule out' the possible existence of paranormal phenomena.

Brian D. Josephson

2003-12-02T23:59:59.000Z

278

On-line Approximate String Matching in Natural Language  

Science Conference Proceedings (OSTI)

We consider approximate pattern matching in natural language text. We use the words of the text as the alphabet, instead of the characters as in traditional string matching approaches. Hence our pattern consists of a sequence of words. From the algorithmic ... Keywords: Approximate string matching, filtering, natural language processing, phrase matching, word alphabet

Kimmo Fredriksson

2006-09-01T23:59:59.000Z

279

Resonant acoustic transducer system for a well drilling string  

DOE Patents (OSTI)

For use in transmitting acoustic waves propated along a well drilling string, a piezoelectric transducer is provided operating in the relatively low loss acoustic propagation range of the well drilling string. The efficiently coupled transmitting transducer incorporates a mass-spring-piezoelectric transmitter combination permitting a resonant operation in the desired low frequency range.

Nardi, Anthony P. (Burlington, MA)

1981-01-01T23:59:59.000Z

280

Signature of cosmic string wakes in the CMB polarization  

Science Conference Proceedings (OSTI)

We calculate a signature of cosmic strings in the polarization of the cosmic microwave background. We find that ionization in the wakes behind moving strings gives rise to extra polarization in a set of rectangular patches in the sky whose length distribution is scale-invariant. The length of an individual patch is set by the comoving Hubble radius at the time the string is perturbing the cosmic microwave background. The polarization signal is largest for string wakes produced at the earliest post-recombination time, and for an alignment in which the photons cross the wake close to the time the wake is created. The maximal amplitude of the polarization relative to the temperature quadrupole is set by the overdensity of free electrons inside a wake which depends on the ionization fraction f inside the wake. For a cosmic string wake coming from an idealized string segment, the signal can be as high as 0.06 {mu}K in degree scale polarization for a string at high redshift (near recombination) and a string tension {mu} given by G{mu}=10{sup -7}.

Danos, Rebecca J.; Brandenberger, Robert H.; Holder, Gil [Department of Physics, McGill University, Montreal, QC, H3A 2T8 (Canada)

2010-07-15T23:59:59.000Z

Note: This page contains sample records for the topic "holiday light strings" 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

From string theory to algebraic geometry and back  

Science Conference Proceedings (OSTI)

We describe some facts in physics which go up to the modern string theory and the related concepts in algebraic geometry. Then we present some recent results on moduli-spaces of vector bundles on non-Kaehler Calabi-Yau 3-folds and their consequences for heterotic string theory.

Brinzanescu, Vasile ['Simion Stoilow' Institute of Mathematics of the Romanian Academy, P.O.Box 1-764, Bucharest (Romania)

2011-02-10T23:59:59.000Z

282

Resonant acoustic transducer system for a well drilling string  

DOE Patents (OSTI)

For use in transmitting acoustic waves propagated along a well drilling string, a piezoelectric transducer is provided operating in the relatively low loss acoustic propagation range of the well drilling string. The efficiently coupled transmitting transducer incorporates a mass-spring-piezoelectric transmitter combination permitting resonant operation in the desired low frequency range.

Kent, William H. (Westford, MA); Mitchell, Peter G. (Concord, MA)

1981-01-01T23:59:59.000Z

283

Non-Abelian strings in supersymmetric Yang-Mills  

Science Conference Proceedings (OSTI)

I give a broad review of novel phenomena discovered in certain Yang-Mills theories: non-Abelian strings and confined monopoles. Then I explain how these phenomena allow one to study strong dynamics of gauge theories in four dimensions from two-dimensional models emerging on the string world sheet.

Shifman, M. [William I. Fine Theoretical Physics Institute, University of Minnesota, Minneapolis, MN 55455 (United States)

2012-09-26T23:59:59.000Z

284

How does gluon string split into two quark ones  

Science Conference Proceedings (OSTI)

In this paper, the authors assume that gluon string splits into two quark ones and not instantaneously but via creation of the so-called zip-antizip pairs along the gluon string. This additional stage prolongs hadronization process and gives the novel source of fluctuations that softens hadron z-spectrum and widens the multiplicity distribution.

Gurvich, E.G.; Leptoukh, G.G. (Inst. of Physics of the Georgian Academy of Sciences, Tamarashvili 6, Tbilisi (USSR))

1992-09-28T23:59:59.000Z

285

Charged Vacuum Condensate Near a Superconducting Cosmic String  

E-Print Network (OSTI)

A charged superconductiong cosmic string produces an extremely large electric field in its vicinity. This leads to vacuum instability and to the formation of a charged vacuum condensate which screens the electric charge of the string. We analyze the structure of this condensate using the Thomas-Fermi method.

J. R. S. Nascimento; Inyong Cho; Alexander Vilenkin

1999-02-18T23:59:59.000Z

286

Black hole/string ball production, possibly at LHC  

E-Print Network (OSTI)

I show a brief historical overview of recent developments on the black hole physics that can be possibly explored at LHC. I comment on the correspondence principle of black holes and strings and show its realization in a differential production cross section of a black hole/string ball with fixed angular momentum.

Oda, Kin-ya

2010-01-01T23:59:59.000Z

287

Cosmic String constraints from WMAP and the South Pole Telescope  

E-Print Network (OSTI)

The predictions of the inflationary LCDM paradigm match today's high-precision measurements of the cosmic microwave background anisotropy extremely well. The same data put tight limits on other sources of anisotropy. Cosmic strings are a particularly interesting alternate source to constrain. Strings are topological defects, remnants of inflationary-era physics that persist after the big bang. They are formed in a variety of models of inflation, including string theory models such as brane inflation. We assume a "Nambu-Goto" model for strings, approximated by a collection of unconnected segments with zero width, and show that measurements of temperature anisotropy by the South Pole Telescope break a parameter degeneracy in the WMAP data, permitting us to place a strong upper limit on the possible string contribution to the CMB anisotropy: the power sourced by zero-width strings must be <1.75% (95% CL) of the total or the string tension Gmu <1.7x10^{-7}. These limits imply that the best hope for detecting strings in the CMB will come from B-mode polarization measurements at arcminute scales rather than the degree scale measurements pursued for gravitational wave detection.

Cora Dvorkin; Mark Wyman; Wayne Hu

2011-09-22T23:59:59.000Z

288

Quantum Fusion of Strings (Flux Tubes) and Domain Walls  

E-Print Network (OSTI)

We consider formation of composite strings and domain walls as a result of fusion of two elementary objects (elementary strings in the first case and elementary walls in the second) located at a distance from each other. The tension of the composite object T_2 is assumed to be less than twice the tension of the elementary object T_1, so that bound states are possible. If in the initial state the distance d between the fusing strings or walls is much larger than their thickness and satisfies the conditions T_1 d^2 >> 1 (in the string case) and T_1 d^3 >> 1 (in the wall case), the problem can be fully solved quasiclassically. The fusion probability is determined by the first, "under the barrier" stage of the process. We find the bounce configuration and its extremal action S_B. In the wall problem e^{-S_B} gives the fusion probability per unit time per unit area. In the string case, due to a logarithmic infrared divergence, the problem is well formulated only for finite-length strings. The fusion probability per unit time can be found in the limit in which the string length is much larger than the distance between two merging strings.

S. Bolognesi; M. Shifman; M. B. Voloshin

2009-05-11T23:59:59.000Z

289

Signatures of Cosmic Strings in the Cosmic Microwave Background  

E-Print Network (OSTI)

We report a search for signatures of cosmic strings in the the Cosmic Microwave Background data from the Wilkinson Microwave Anisotropy Probe. We used a digital filter designed to search for individual cosmic strings and found no evidence for them in the WMAP CMB anisotropies to a level of $\\Delta T/T \\sim 0.29$ mK. This corresponds to an absence of cosmic strings with $ G\\mu \\ga 1.07 \\times 10^{-5}$ for strings moving with velocity $v = c/\\sqrt{2}$. Unlike previous work, this limit does not depend on an assumed string abundance. We have searched the WMAP data for evidence of a cosmic string recently reported as the CSL-1 object, and found an ``edge'' with 2$\\sigma$ significance. However, if this edge is real and produced by a cosmic string, it would have to move at velocity $\\ga$ 0.94c. We also present preliminary limits on the CMB data that will be returned by the PLANCK satellite for comparison. With the available information on the PLANCK satellite, we calculated that it would be twice as sensitive to cosmic strings as WMAP.

Amy S. Lo; Edward L. Wright

2005-03-05T23:59:59.000Z

290

Probing the 5th Dimension with the QCD String  

E-Print Network (OSTI)

A salient feature of String/Gauge duality is an extra 5th dimension. Here we study the effect of confining deformations of AdS5 and compute the spectrum of a string stretched between infinitely massive quarks and compare it with the quantum states of the QCD flux as determined by Kuti, Juge and Morningstar in lattice simulations. In the long flux tube limit the AdS string probes the metric near the IR cutoff of the 5th dimension with a spectrum approximated by a Nambu-Goto string in 4-d flat space, whereas at short distance the string moves to the UV region with a discrete spectrum for pure AdS5. We also review earlier results on glueballs states and the cross-over between hard and soft diffractive scattering that support this picture.

Richard C. Brower; Chung-I Tan; Ethan Thompson

2005-03-29T23:59:59.000Z

291

String stabilized ribbon growth a method for seeding same  

DOE Patents (OSTI)

This invention is a method of initiating or seeding the growth of a crystalline or polycrystalline ribbon by the String Stabilized Ribbon Growth Method. The method for seeding the crystal growth comprises contacting a melt surface with a seed and two strings used in edge stabilization. The wetted strings attach to the wetted seed as a result of the freezing of the liquid melt. Upon drawing the seed, which is attached to the strings, away from the melt surface a melt liquid meniscus, a seed junction, and a growth interface forms. Further pulling of the attached seed causes a crystal ribbon to grow at the growth interface. The boundaries of the growing ribbon are: at the top the seed junction, at the bottom the freezing boundary of the melt liquid meniscus, and at the edges frozen-in strings.

Sachs, Emanuel M. (39 Harding Ave., Belmont, MA 02178)

1987-08-25T23:59:59.000Z

292

On the Computational Complexity of Satisfiability Solving for String Theories  

E-Print Network (OSTI)

Satisfiability solvers are increasingly playing a key role in software verification, with particularly effective use in the analysis of security vulnerabilities. String processing is a key part of many software applications, such as browsers and web servers. These applications are susceptible to attacks through malicious data received over network. Automated tools for analyzing the security of such applications, thus need to reason about strings. For efficiency reasons, it is desirable to have a solver that treats strings as first-class types. In this paper, we present some theories of strings that are useful in a software security context and analyze the computational complexity of the presented theories. We use this complexity analysis to motivate a byte-blast approach which employs a Boolean encoding of the string constraints to a corresponding Boolean satisfiability problem. 1

Susmit Jha; Sanjit A. Seshia; Rhishikesh Limaye

2009-01-01T23:59:59.000Z

293

Strings, black holes, and quantum information  

SciTech Connect

We find multiple relations between extremal black holes in string theory and 2- and 3-qubit systems in quantum information theory. We show that the entropy of the axion-dilaton extremal black hole is related to the concurrence of a 2-qubit state, whereas the entropy of the STU black holes, Bogomol'nyi-Prasad-Sommerfield (BPS) as well as non-BPS, is related to the 3-tangle of a 3-qubit state. We relate the 3-qubit states with the string theory states with some number of D-branes. We identify a set of large black holes with the maximally entangled Greenberger, Horne, Zeilinger (GHZ) class of states and small black holes with separable, bipartite, and W states. We sort out the relation between 3-qubit states, twistors, octonions, and black holes. We give a simple expression for the entropy and the area of stretched horizon of small black holes in terms of a norm and 2-tangles of a 3-qubit system. Finally, we show that the most general expression for the black hole and black ring entropy in N=8 supergravity/M theory, which is given by the famous quartic Cartan E{sub 7(7)} invariant, can be reduced to Cayley's hyperdeterminant describing the 3-tangle of a 3-qubit state.

Kallosh, Renata; Linde, Andrei [Department of Physics, Stanford University, Stanford, California 94305 (United States)

2006-05-15T23:59:59.000Z

294

International Cooperation Holiday Cheer  

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

Elizabeth Melton, Angela Ramsey and Chelsea Richey. U.S. Department of Energy National Nuclear Security Administration Nevada Field Office P.O. Box 98518, Las Vegas, NV 89193-8518...

295

Light-Light Scattering  

E-Print Network (OSTI)

For a long time, it is believed that the light by light scattering is described properly by the Lagrangian density obtained by Heisenberg and Euler. Here, we present a new calculation which is based on the modern field theory technique. It is found that the light-light scattering is completely different from the old expression. The reason is basically due to the unphysical condition (gauge condition) which was employed by the QED calcualtion of Karplus and Neumann. The correct cross section of light-light scattering at low energy of $(\\frac{\\omega}{m} \\ll 1)$ can be written as $ \\displaystyle{\\frac{d\\sigma}{d\\Omega}=\\frac{1}{(6\\pi)^2}\\frac{\\alpha^4} {(2\\omega)^2}(3+2\\cos^2\\theta +\\cos^4\\theta)}$.

Kanda, Naohiro

2011-01-01T23:59:59.000Z

296

Light-Light Scattering  

E-Print Network (OSTI)

For a long time, it is believed that the light by light scattering is described properly by the Lagrangian density obtained by Heisenberg and Euler. Here, we present a new calculation which is based on the modern field theory technique. It is found that the light-light scattering is completely different from the old expression. The reason is basically due to the unphysical condition (gauge condition) which was employed by the QED calcualtion of Karplus and Neumann. The correct cross section of light-light scattering at low energy of $(\\frac{\\omega}{m} \\ll 1)$ can be written as $ \\displaystyle{\\frac{d\\sigma}{d\\Omega}=\\frac{1}{(6\\pi)^2}\\frac{\\alpha^4} {(2\\omega)^2}(3+2\\cos^2\\theta +\\cos^4\\theta)}$.

Naohiro Kanda

2011-06-03T23:59:59.000Z

297

Spiky strings in the Bethe ansatz at strong coupling  

Science Conference Proceedings (OSTI)

We study spiky string solutions in AdS{sub 3}xS{sup 1} that are characterized by two spins S, J as well as winding m in S{sup 1} and spike number n. We construct explicitly two-cut solutions by using the SL(2) asymptotic Bethe ansatz equations at leading order in strong coupling. Unlike the folded spinning string, these solutions have asymmetric distributions of Bethe roots. The solutions match the known spiky string classical results obtained directly from string theory for arbitrary semiclassical parameters, including J=0 and any value of S, namely, short and long strings. At large spins and winding number the string touches the boundary, and we find a new scaling limit with the energy given as E-S=(n/2{pi}){radical}(1+[(4{pi}{sup 2})/n{sup 2}](J{sup 2}/ln{sup 2}S+m{sup 2}/ln{sup 2}S))lnS. This is a generalization of the known scaling for the folded spinning string.

Kruczenski, M.; Tirziu, A. [Department of Physics, Purdue University, W. Lafayette, Indiana 47907-2036 (United States)

2010-05-15T23:59:59.000Z

298

Energy Saver Blog | Department of Energy  

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

December 23, 2010 December 23, 2010 What Do You Think of Your LED Holiday Lights? Learn more about LED light strings for their holiday decorations. December 21, 2010 Remember the Batteries - and Maybe a Charger? For the holiday gift-giving season take a look at the ENERGY STAR® list of certified rechargeable batteries. December 20, 2010 Tax Credits, Appliance Rebates, and the End of 2010 Confused about the tax credits and appliance rebates? Here's the straight story on what is going on and when: December 16, 2010 How Do You Reduce Energy Use from Computers and Electronics? How do you reduce energy use from computers and electronics? December 14, 2010 Deck Those Halls! Preparing to decorate your home for the holiday season? Consider LED lighting as an energy-efficient option.

299

The SSC full cell prototype string test  

Science Conference Proceedings (OSTI)

At the conclusion of the SSC half cell magnet string testing program in February, 1993, the preliminary data analysis revealed that several substantive technical questions remained unresolved. These questions were: (1) could the high voltages to ground (>2 kV) measured during fault (quench) conditions be substantially reduced, (2) could the number of magnetic elements that became resistive (quenched) be controlled and 3) did the cryostats of the magnetic elements provide adequate insulation and isolation to meet designed refrigeration loads. To address these and other existing questions, a prototypical fall cell of collider magnets (ten dipoles and two quadrupoles) was assembled and tested. At the conclusion of this testing there were definitive answers to most of the questions with numerical substantiation, the notable exception being the beat leak question. These answers and other results and issues are presented in this paper.

McInturff, A.D. [Lawrence Berkeley Lab., CA (United States); Kraushaar, P.; Burgett, W.; Cromer, L. [Superconducting Super Collider Lab., Dallas, TX (United States)] [and others

1994-10-17T23:59:59.000Z

300

Conformable apparatus in a drill string  

DOE Patents (OSTI)

An apparatus in a drill string comprises an internally upset drill pipe. The drill pipe comprises a first end, a second end, and an elongate tube intermediate the first and second ends. The elongate tube and the ends comprising a continuous an inside surface with a plurality of diameters. A conformable metal tube is disposed within the drill pipe intermediate the ends thereof and terminating adjacent to the ends of the drill pipe. The conformable metal tube substantially conforms to the continuous inside surface of the metal tube. The metal tube may comprise a non-uniform section which is expanded to conform to the inside surface of the drill pipe. The non-uniform section may comprise protrusions selected from the group consisting of convolutions, corrugations, flutes, and dimples. The non-uniform section extends generally longitudinally along the length of the tube. The metal tube may be adapted to stretch as the drill pipes stretch.

Hall, David R. (Provo, UT); Hall, Jr., H. Tracy (Provo, UT); Pixton, David S. (Lehi, UT); Fox, Joe (Spanish Fork, UT)

2007-08-28T23:59:59.000Z

Note: This page contains sample records for the topic "holiday light strings" 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

Harmonic coordinates in the string and membrane equations  

Science Conference Proceedings (OSTI)

In this note, we first show that the solutions to Cauchy problems for two versions of relativistic string and membrane equations are diffeomorphic. Then we investigate the coordinates transformation presented in D. X. Kong and Q. Zhang [Physica D 238, 902 (2009); see (2.20)] which plays an important role in the study on the dynamics of the motion of string in Minkowski space. This kind of transformed coordinates is harmonic coordinates, and the nonlinear relativistic string equations can be straightforwardly simplified into linear wave equations under this transformation.

He Chunlei; Huang Shoujun [Department of Mathematics, Anhui Normal University, Wuhu 241000 (China)

2010-09-15T23:59:59.000Z

302

Cerenkov radiation from collisions of straight cosmic (super)strings  

E-Print Network (OSTI)

We consider Cerenkov radiation which must arise when randomly oriented straight cosmic (super)strings move with relativistic velocities without intercommutation. String interactions via dilaton, two-form and gravity (gravity being the dominant force in the ultra-relativistic regime) leads to formation of superluminal sources which generate Cerenkov radiation of dilatons and axions. Though the effect is of the second order in the couplings of strings to these fields, its total efficiency is increased by high dependence of the radiation rate on the Lorentz-factor of the collision.

Elena Melkumova; Dmitri Gal'tsov; Karim Salehi

2006-12-26T23:59:59.000Z

303

Dynamics of a global string with large Higgs boson mass  

E-Print Network (OSTI)

We consider a self-gravitating string generated by a global vortex solution in general relativity. We investigate the Einstein and field equations of a global vortex in the region of its central line and at a distance from the centre of the order of the inverse of its Higgs boson mass. By combining the two we establish by a limiting process of large Higgs mass the dynamics of a self-gravitating global string. Under our assumptions the presence of gravitation restricts the world sheet of the global string to be totally geodesic.

C. Charmousis; B. Boisseau; B. Linet

1997-08-01T23:59:59.000Z

304

Multiloop World-Line Green Functions from String Theory  

E-Print Network (OSTI)

We show how the multiloop bosonic Green function of closed string theory reduces to the world-line Green function as defined by Schmidt and Schubert in the limit where the string world-sheet degenerates into a $\\Phi^3$ particle diagram. To obtain this correspondence we have to make an appropriate choice of the local coordinates defined on the degenerate string world sheet. We also present a set of simple rules that specify, in the explicit setting of the Schottky parametrization, which is the corner of moduli space corresponding to a given multiloop $\\Phi^3$ diagram.

Kaj Roland; Haru-Tada Sato

1996-04-24T23:59:59.000Z

305

Black Rings, Boosted Strings and Gregory-Laflamme  

E-Print Network (OSTI)

We investigate the Gregory-Laflamme instability for black strings carrying KK-momentum along the internal direction. We demonstrate a simple kinematical relation between the thresholds of the classical instability for the boosted and static black strings. We also find that Sorkin's critical dimension depends on the internal velocity and in fact disappears for sufficiently large boosts. Our analysis implies the existence of an analogous instability for the five-dimensional black ring of Emparan and Reall. We also use our results for boosted black strings to construct a simple model of the black ring and argue that such rings exist in any number of space-time dimensions.

J. L. Hovdebo; R. C. Myers

2006-01-12T23:59:59.000Z

306

Duality Symmetric String and M-Theory  

E-Print Network (OSTI)

We review recent developments in duality symmetric string theory. We begin with the world sheet doubled formalism which describes strings in an extended space time with extra coordinates conjugate to winding modes. This formalism is T-duality symmetric and can accommodate non-geometric T-fold backgrounds which are beyond the scope of Riemannian geometry. Vanishing of the conformal anomaly of this theory can be interpreted as a set of spacetime equations for the background fields. These equations follow from an action principle that has been dubbed Double Field Theory (DFT). We review the aspects of generalised geometry relevant for DFT. We outline recent extensions of DFT and explain how, by relaxing the so-called strong constraint with a Scherk Schwarz ansatz, one can obtain backgrounds that simultaneously depend on both the regular and T-dual coordinates. This provides a purely geometric higher dimensional origin to gauged supergravities that arise from non-geometric compactification. We then turn to M-theory and describe recent progress in formulating an E_{n(n)} U-duality covariant description of the dynamics. We describe how spacetime may be extended to accommodate coordinates conjugate to brane wrapping modes and the construction of generalised metrics in this extend space that unite the bosonic fields of supergravity into a single object. We review the action principles for these theories and their novel gauge symmetries. We also describe how a Scherk Schwarz reduction can be applied in the M-theory context and the resulting relationship to the embedding tensor formulation of maximal gauged supergravities.

David S. Berman; Daniel C. Thompson

2013-06-11T23:59:59.000Z

307

String Gas Shells, their Dual Radiation and Hedgehog Signature Control  

E-Print Network (OSTI)

We search for spherically symmetric, stationary solutions with a string gas shell as a source. The requirement of a uniform newtonian potential, or constancy of the 00 component of the metric, implies the existence of a "dual" radiation, which we argue can be interpreted as representing the virtual quantum fluctuations that stabilize the shell. A string hedgehog can be introduced also into the solution. For zero or small hedgehog strength the string gas shell is of a regular nature, while the dual radiation is of a spacelike nature. For higher hedgehog strengths however the radiation "materializes" and becomes timelike while the string gas shell becomes space like. The significance of these solutions for the quantum theory is discussed.

E. I. Guendelman

2009-03-12T23:59:59.000Z

308

Phenomenological survey of free fermionic heterotic-string models  

E-Print Network (OSTI)

A glossary overview of the phenomenological studies of quasi-realistic free fermionic heterotic string models is presented. I elaborate on the correspondence of these models with Z2XZ2 orbifolds.

Faraggi, Alon E

2008-01-01T23:59:59.000Z

309

Phenomenological survey of free fermionic heterotic-string models  

E-Print Network (OSTI)

A glossary overview of the phenomenological studies of quasi-realistic free fermionic heterotic string models is presented. I elaborate on the correspondence of these models with Z2XZ2 orbifolds.

Alon E. Faraggi

2008-09-16T23:59:59.000Z

310

Duality Phase Transition in Type I String Theory  

E-Print Network (OSTI)

We show that the duality phase transition in the unoriented type I theory of open and closed strings is_first order_. The order parameter is the semiclassical approximation to the heavy quark-antiquark potential at finite temperature, extracted from the covariant off-shell string amplitude with Wilson loop boundaries wrapped around the Euclidean time direction. Remarkably, precise calculations can be carried out on either side of the phase boundary at the string scale T_C = 1/2\\pi \\alpha^{'1/2} by utilizing the T-dual, type IB and type I', descriptions of the short string gas of massless gluon radiation. We will calculate the change in the duality transition temperature in the presence of an electromagnetic background field.

Shyamoli Chaudhuri

2005-02-15T23:59:59.000Z

311

Efficient Solutions for the Far From Most String Problem  

E-Print Network (OSTI)

Apr 7, 2011 ... Efficient Solutions for the Far From Most String Problem. Paola Festa(paola.festa ***at*** unina.it) Panos M. Pardalos(pardalos ***at*** ufl.edu).

312

Wilson loops in string duals of walking and flavored systems  

Science Conference Proceedings (OSTI)

We consider the vacuum expectation value of Wilson loop operators by studying the behavior of string probes in solutions of type-IIB string theory generated by N{sub c} D5-branes wrapped on an S{sup 2} internal manifold. In particular, we focus on solutions to the background equations that are dual to field theories with a walking gauge coupling as well as for flavored systems. We present in detail our walking solution and emphasize various general aspects of the procedure to study Wilson loops using string duals. We discuss the special features that the strings show when probing the region associated with the walking of the field-theory coupling.

Nunez, Carlos; Piai, Maurizio; Rago, Antonio [Swansea University, School of Physical Sciences, Singleton Park, Swansea, Wales (United Kingdom)

2010-04-15T23:59:59.000Z

313

Ripples in a string coupled to Glauber spins  

E-Print Network (OSTI)

Each oscillator in a linear chain (a string) interacts with a local Ising spin in contact with a thermal bath. These spins evolve according to Glauber dynamics. Below a critical temperature, there appears an equilibrium, ...

Rosales, Rodolfo R.

314

Three level constraints on conformal field theories and string models  

Science Conference Proceedings (OSTI)

Simple tree level constraints for conformal field theories which follow from the requirement of crossing symmetry of four-point amplitudes are presented, and their utility for probing general properties of string models is briefly illustrated and discussed. 9 refs.

Lewellen, D.C.

1989-05-01T23:59:59.000Z

315

Effective software testing with a string-constraint solver  

E-Print Network (OSTI)

This dissertation presents techniques and tools for improving software reliability, by using an expressive string-constraint solver to make implementation-based testing more effective and more applicable. Concolic testing ...

Kie?un, Adam

2009-01-01T23:59:59.000Z

316

Annual Review of BPA-Funded Projects in Natural and Artificial Propagation of Salmonids, March 27-29, 1985, Holiday Inn Airport, Portland, Oregon.  

Science Conference Proceedings (OSTI)

The Fish and Wildlife Division of Bonneville Power Administration (BPA) hosted a meeting for contractors to present the results of fiscal year 1984 research conducted to implement the Northwest Power Planning Council's Fish and Wildlife Program. The meeting focused on those projects specifically related to natural and artificial propagation of salmonids. The presentations were held at the Holiday Inn Airport in Portland, Oregon, on March 27-29, 1985. This document contains abstracts of the presentations from that meeting. Section 1 contains abstracts on artificial propagation, fish health, and downstream migration, and Section 2 contains abstracts on natural propagation and habitat improvement. The abstracts are indexed by BPA Project Number and by Fish and Wildlife Program Measure. The registered attendees at the meeting are listed alphabetically in Appendix A and by affiliation in Appendix B.

United States. Bonneville Power Administration.

1985-04-01T23:59:59.000Z

317

String-corrected dilatonic black holes in d dimensions  

Science Conference Proceedings (OSTI)

We solve the dilaton field equation in the background of a spherically symmetric black hole in bosonic or heterotic string theory with curvature-squared corrections in arbitrary d spacetime dimensions. We then apply this result to obtain a spherically symmetric black hole solution with dilatonic charge and curvature-squared corrections in bosonic or heterotic string theory compactified on a torus. For this black hole, we obtain its free energy, entropy, temperature, specific heat, and mass.

Moura, Filipe [Centro de Matematica da Universidade do Minho, Escola de Ciencias, Campus de Gualtar, 4710-057 Braga (Portugal)

2011-02-15T23:59:59.000Z

318

On tadpoles and vacuum redefinitions in String Theory  

E-Print Network (OSTI)

Tadpoles accompany, in one form or another, all attempts to realize supersymmetry breaking in String Theory, making the present constructions at best incomplete. Whereas these tadpoles are typically large, a closer look at the problem from a perturbative viewpoint has the potential of illuminating at least some of its qualitative features in String Theory. A possible scheme to this effect was proposed long ago by Fischler and Susskind, but incorporating background redefinitions in string amplitudes in a systematic fashion has long proved very difficult. In the first part of this paper, drawing from field theory examples, we thus begin to explore what one can learn by working perturbatively in a ``wrong'' vacuum. While unnatural in Field Theory, this procedure presents evident advantages in String Theory, whose definition in curved backgrounds is mostly beyond reach at the present time. At the field theory level, we also identify and characterize some special choices of vacua where tadpole resummations terminate after a few contributions. In the second part we present a notable example where vacuum redefinitions can be dealt with to some extent at the full string level, providing some evidence for a new link between IIB and 0B orientifolds. We finally show that NS-NS tadpoles do not manifest themselves to lowest order in certain classes of string constructions with broken supersymmetry and parallel branes, including brane-antibrane pairs and brane supersymmetry breaking models, that therefore have UV finite threshold corrections at one loop.

E. Dudas; G. Pradisi; M. Nicolosi; A. Sagnotti

2004-10-09T23:59:59.000Z

319

Black Strings, Black Rings and State-space Manifold  

E-Print Network (OSTI)

State-space geometry is considered, for diverse three and four parameter non-spherical horizon rotating black brane configurations, in string theory and $M$-theory. We have explicitly examined the case of unit Kaluza-Klein momentum $D_1D_5P$ black strings, circular strings, small black rings and black supertubes. An investigation of the state-space pair correlation functions shows that there exist two classes of brane statistical configurations, {\\it viz.}, the first category divulges a degenerate intrinsic equilibrium basis, while the second yields a non-degenerate, curved, intrinsic Riemannian geometry. Specifically, the solutions with finitely many branes expose that the two charged rotating $D_1D_5$ black strings and three charged rotating small black rings consort real degenerate state-space manifolds. Interestingly, arbitrary valued $M_5$-dipole charged rotating circular strings and Maldacena Strominger Witten black rings exhibit non-degenerate, positively curved, comprehensively regular state-space configurations. Furthermore, the state-space geometry of single bubbled rings admits a well-defined, positive definite, everywhere regular and curved intrinsic Riemannian manifold; except for the two finite values of conserved electric charge. We also discuss the implication and potential significance of this work for the physics of black holes in string theory.

Stefano Bellucci; Bhupendra Nath Tiwari

2010-10-19T23:59:59.000Z

320

Cosmic Strings in a Braneworld Theory with Metastable Gravitons  

E-Print Network (OSTI)

If the graviton possesses an arbitrarily small (but nonvanishing) mass, perturbation theory implies that cosmic strings have a nonzero Newtonian potential. Nevertheless in Einstein gravity, where the graviton is strictly massless, the Newtonian potential of a cosmic string vanishes. This discrepancy is an example of the van Dam--Veltman--Zakharov (VDVZ) discontinuity. We present a solution for the metric around a cosmic string in a braneworld theory with a graviton metastable on the brane. This theory possesses those features that yield a VDVZ discontinuity in massive gravity, but nevertheless is generally covariant and classically self-consistent. Although the cosmic string in this theory supports a nontrivial Newtonian potential far from the source, one can recover the Einstein solution in a region near the cosmic string. That latter region grows as the graviton's effective linewidth vanishes (analogous to a vanishing graviton mass), suggesting the lack of a VDVZ discontinuity in this theory. Moreover, the presence of scale dependent structure in the metric may have consequences for the search for cosmic strings through gravitational lensing techniques.

Arthur Lue

2001-11-20T23:59:59.000Z

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


321

LED Lighting  

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

Light-emitting diodes (LEDs) are light sources that differ from more traditional sources of light in that they are semiconductor devices that produce light when an electrical current is applied....

322

OPEN 4:30p.m. 1:00a.m. daily (except University holidays)  

E-Print Network (OSTI)

.79 Gatorade: Red, Yellow, Orange, Light Blue, Medium Blue; G2: Red, Orange, Purple, Dark Blue Canned Soda, 12 Wings and 2 Large Wedges $49.99 Three Sbarro Cheese Pizzas $37.99 Pizza and Wing Special: One Topping Pizza and 20 Wings $29.99 Specials Sbarro Pizza Made with all-natural ingredients, including dough made

Raina, Ramesh

323

What is the maximum rate at which entropy of a string can increase?  

Science Conference Proceedings (OSTI)

According to Susskind, a string falling toward a black hole spreads exponentially over the stretched horizon due to repulsive interactions of the string bits. In this paper such a string is modeled as a self-avoiding walk and the string entropy is found. It is shown that the rate at which information/entropy contained in the string spreads is the maximum rate allowed by quantum theory. The maximum rate at which the black hole entropy can increase when a string falls into a black hole is also discussed.

Ropotenko, Kostyantyn [State Administration of Communications, Ministry of Transport and Communications of Ukraine 22, Khreschatyk, 01001, Kyiv (Ukraine)

2009-03-15T23:59:59.000Z

324

Limits on a muon flux from neutralino annihilations in the Sun with the IceCube 22-string detector  

E-Print Network (OSTI)

the Sun with the IceCube 22-string detector R. Abbasi, 24 Y.in the Sun with the IceCube 22-string detector The IceCubeperformed with the IceCube 22-string neutrino detector using

Klein, Spencer; IceCube Collaboration

2009-01-01T23:59:59.000Z

325

Three-dimensional scalar field theory model of center vortices and its relation to k-string tensions  

E-Print Network (OSTI)

the ?ux J is, vortex strings always have the same thicknessand its relation to k-string tensions John M. Cornwall 1determination of so-called k-string tensions. This model is

Cornwall, J M

2004-01-01T23:59:59.000Z

326

Proton hexality from an anomalous flavor U(1) and neutrino masses--Linking to the string scale  

E-Print Network (OSTI)

Masses – Linking to the String Scale* Herbi K. Dreiner 1 ,Masses – Linking to the String Scale arXiv:0708.0989v2 [hep-allows the calculation of g string , g X and G SM ’s Ka? -

Dreiner, Herbi K.

2008-01-01T23:59:59.000Z

327

Energy of string loops and thermodynamics of dark energy  

Science Conference Proceedings (OSTI)

We discuss the thermodynamic aspects of a simple model of cosmic string loops, whose energy is nonlinearly related to their lengths. We obtain in a direct way an equation of state having the form p=-(1+{alpha}){rho}/3, with {rho} the energy density and 1+{alpha} the exponent which relates the energy u{sub l} of a loop with its length l as u{sub l}{approx}l{sup 1+{alpha}}. In the linear situation ({alpha}=0) one has p=-{rho}/3, in the quadratic one ({alpha}=1) p=-2{rho}/3, and in the cubic case ({alpha}=2) p=-{rho}. For all values of {alpha} the entropy goes as S{approx}(2-{alpha})L{sup 3/2} (L being the string length density). The expression of S is useful to explore the behavior of such string loops under adiabatic expansion of the Universe. Thermodynamic stability suggests that the gas of string loops must coexist with several long strings, longer than the horizon radius.

Jou, D. [Departament de Fisica, Universitat Autonoma de Barcelona, 08193 Bellaterra, Catalonia (Spain); Mongiovi, M. S.; Sciacca, M. [Dipartimento di Metodi e Modelli Matematici, Universita di Palermo, Viale delle Scienze, 90128, Palermo (Italy)

2011-02-15T23:59:59.000Z

328

Mirage Models Confront the LHC: II. Flux-Stabilized Type IIB String Theory  

E-Print Network (OSTI)

We continue the study of a class of string-motivated effective supergravity theories in light of current data from the CERN Large Hadron Collider (LHC). In this installment we consider Type IIB string theory compactified on a Calabi-Yau orientifold in the presence of fluxes, in the manner originally formulated by Kachru, et al. We allow for a variety of potential uplift mechanisms and embeddings of the Standard Model field content into D3 and D7 brane configurations. We find that an uplift sector independent of the Kahler moduli, as is the case with anti-D3 branes, is inconsistent with data unless the matter and Higgs sectors are localized on D7 branes exclusively, or are confined to twisted sectors between D3 and D7 branes. We identify regions of parameter space for all possible D-brane configurations that remain consistent with PLANCK observations on the dark matter relic density and measurements of the CP-even Higgs mass at the LHC. Constraints arising from LHC searches at 8 TeV center-of-mass energies, and the LUX dark matter detection experiment, are discussed. The discovery prospects for the remaining parameter space at dark matter direct detection experiments are described, and signatures for detection of superpartners at the LHC, with center-of-mass energy of 14 TeV, are analyzed.

Bryan Kaufman; Brent D. Nelson

2013-12-23T23:59:59.000Z

329

Lighting Techniques  

Science Conference Proceedings (OSTI)

...Lighting is very critical in photography. The specimen should be placed on a background which will not detract from the resolution of the fracture surface. For basic lighting, one spotlight is suggested. The light is then raised or lowered, and

330

V-075: EMC AlphaStor Command Injection and Format String Flaws...  

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

5: EMC AlphaStor Command Injection and Format String Flaws Let Remote Users Execute Arbitrary Code V-075: EMC AlphaStor Command Injection and Format String Flaws Let Remote Users...

331

U-092: Sudo Format String Bug Lets Local Users Gain Elevated...  

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

2: Sudo Format String Bug Lets Local Users Gain Elevated Privileges U-092: Sudo Format String Bug Lets Local Users Gain Elevated Privileges January 31, 2012 - 5:45am Addthis...

332

Superconducting cosmic strings as gamma ray burst engines  

E-Print Network (OSTI)

Cusps of superconducting strings can serve as GRB engines. A powerful beamed pulse of electromagnetic radiation from a cusp produces a jet of accelerated particles, whose propagation is terminated by the shock responsible for GRB. A single free parameter, the string scale of symmetry breaking $\\eta \\sim 10^{14} GeV$, together with reasonable assumptions about the magnitude of cosmic magnetic fields and the fraction of volume that they occupy, explains the GRB rate, duration and fluence, as well as the observed ranges of these quantities. The wiggles on the string can drive the short-time structures of GRB. This model predicts that GRBs are accompanied by strong bursts of gravitational radiation which should be detectable by LIGO, VIRGO and LISA detectors.

V. Berezinsky; B. Hnatyk; A. Vilenkin

2000-01-12T23:59:59.000Z

333

Search for Cosmic Strings in the GOODS Survey  

E-Print Network (OSTI)

We search Hubble Space Telescope Treasury Program images collected as part of the Great Observatories Origins Deep Survey for pairs of galaxies consistent with the gravitational lensing signature of a cosmic string. Our technique includes estimates of the efficiency for finding the lensed galaxy pair. In the north (south) survey field we find no evidence out to a redshift of greater than 0.5 (0.3) for cosmic strings to a mass per unit length limit of $G\\musearches for individual strings in cosmic microwave background (CMB) data. Our limit is higher than other CMB and gravitational wave searches, however, we note that it is less model dependent than these other searches.

J. L. Christiansen; E. Albin; K. A. James; J. Goldman; D. Maruyama; G. F. Smoot

2008-02-29T23:59:59.000Z

334

Possible influence of the two string events on the hadron formation in a nuclear environment  

E-Print Network (OSTI)

One of the basic assumptions of the string model is that as a result of a DIS in nucleus a single string arises, which then breaks into hadrons. However the pomeron exchange considered in this work, leads to the production of two strings in the one event. The hadrons produced in these events have smaller formation lengths, than those with the same energy produced in the single string events. As a consequence, they undergo more substantial absorption in the nuclear matter.

N. Akopov; L. Grigoryan; Z. Akopov

2007-05-07T23:59:59.000Z

335

The propagation of a pulse in the real string and rods  

E-Print Network (OSTI)

The elastic string (rod) of a large mass M is considered, the left end of which is fixed to a body of a small mass m. The second body of mass m is fixed to the right end of the string. The force of the delta-function form is applied to the left side of the string. We find the propagation of a pulse in the system. The problem is related to the quark-string model of mesons.

Miroslav Pardy

2005-03-01T23:59:59.000Z

336

Theoretical Research in Cosmology, High-Energy Physics and String Theory  

Science Conference Proceedings (OSTI)

The research was in the area of Theoretical Physics: Cosmology, High-Energy Physics and String Theory

Ng, Y Jack; Dolan, Louise; Mersini-Houghton, Laura; Frampton, Paul

2013-07-29T23:59:59.000Z

337

Black Hole - String Transition and Rolling D-brane  

E-Print Network (OSTI)

We investigate the black hole - string transition in the two-dimensional Lorentzian black hole system from the exact boundary states that describe the rolling D-brane falling down into the two-dimensional black hole. The black hole - string phase transition is one of the fundamental properties of the non-supersymmetric black holes in string theory, and we will reveal the nature of the phase transition from the exactly solvable world-sheet conformal field theory viewpoint. Since the two-dimensional Lorentzian black hole system (SL(2;R)_k/U(1) coset model at level k) typically appears as near-horizon geometries of various singularities such as NS5-branes in string theory, our results can be regarded as the probe of such singularities from the non-supersymmetric probe rolling D-brane. The exact construction of boundary states for the rolling D0-brane falling down into the two-dimensional D-brane enables us to probe the phase transition at k=1 directly in the physical amplitudes. During the study, we uncover three fundamental questions in string theory as a consistent theory of quantum gravity: small charge limit v.s. large charge limit of non-supersymmetric quantum black holes, analyticity v.s. non-analyticity in physical amplitudes and physical observables, and unitarity v.s. open closed duality in time-dependent string backgrounds. This work is based on the PhD thesis submitted to Department of Physics, Faculty of Science, University of Tokyo, which was defended on January 2007.

Yu Nakayama

2007-02-28T23:59:59.000Z

338

I Have Seen the Light and It's Green...or Pink, or Blue, or Purple. Shucks,  

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

Have Seen the Light and It's Green...or Pink, or Blue, or Purple. Have Seen the Light and It's Green...or Pink, or Blue, or Purple. Shucks, it's LED Solid-State Lighting. I Have Seen the Light and It's Green...or Pink, or Blue, or Purple. Shucks, it's LED Solid-State Lighting. May 5, 2009 - 5:00am Addthis John Lippert When it comes to lighting, light-emitting diodes (LEDs) are the new kid on the block. LEDs are a form of solid-state lighting. As such, they are following the example of their siblings in the computer industry, improving in performance at an astonishing pace. In this blog I'm going to cover my personal experiences with LED lighting. I'll go over LED lighting in general, providing consumer buying tips, in a future blog. You may already be using LED lighting. They have become a popular holiday lighting option around Christmas time since they consume a fraction of the

339

I Have Seen the Light and It's Green...or Pink, or Blue, or Purple. Shucks,  

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

I Have Seen the Light and It's Green...or Pink, or Blue, or Purple. I Have Seen the Light and It's Green...or Pink, or Blue, or Purple. Shucks, it's LED Solid-State Lighting. I Have Seen the Light and It's Green...or Pink, or Blue, or Purple. Shucks, it's LED Solid-State Lighting. May 5, 2009 - 5:00am Addthis John Lippert When it comes to lighting, light-emitting diodes (LEDs) are the new kid on the block. LEDs are a form of solid-state lighting. As such, they are following the example of their siblings in the computer industry, improving in performance at an astonishing pace. In this blog I'm going to cover my personal experiences with LED lighting. I'll go over LED lighting in general, providing consumer buying tips, in a future blog. You may already be using LED lighting. They have become a popular holiday lighting option around Christmas time since they consume a fraction of the

340

Dimensional reduction of 4d heterotic string black holes  

E-Print Network (OSTI)

We perform the spherical symmetric dimensional reduction $4d\\to2d$ of heterotic string theory. We find a class of two-dimensional (2d) dilaton gravity models that gives a general description of the near-horizon, near-extremal behavior of four-dimensional (4d) heterotic string black holes. We show that the duality group of the 4d theory is realized in two dimensions in terms of Weyl transformations of the metric. We use the 2d dilaton gravity theory to compute the statistical entropy of the near-extremal 4d, $a=1/\\sqrt3$, black hole.

Mariano Cadoni

1999-04-02T23:59:59.000Z

Note: This page contains sample records for the topic "holiday light strings" 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

The issue of Dark Energy in String Theory  

E-Print Network (OSTI)

Recent astrophysical observations, pertaining to either high-redshift supernovae or cosmic microwave background temperature fluctuations, as those measured recently by the WMAP satellite, provide us with data of unprecedented accuracy, pointing towards two (related) facts: (i) our Universe is accelerated at present, and (ii) more than 70 % of its energy content consists of an unknown substance, termed dark energy, which is believed responsible for its current acceleration. Both of these facts are a challenge to String theory. In this review I outline briefly the challenges, the problems and possible avenues for research towards a resolution of the Dark Energy issue in string theory.

Nick E. Mavromatos

2006-07-01T23:59:59.000Z

342

Molecular quantum mechanical observers, symmetry, and string theory  

E-Print Network (OSTI)

The paper \\cite{Dance0601} tentatively suggested a physical picture that might underlie string theories. The string parameters $\\tau $ and $\\sigma_i $ were interpreted as spacetime dimensions which a simple quantum mechanical observer can observe, while symmetries of the relevant observer states could limit the observability of other dimensions. An atomic observer was the focus of the discussion. The present paper extends the discussion of\\cite{Dance0601} to molecular observers, including the nature of some common molecular bonds and their symmetries.

M. Dance

2010-11-29T23:59:59.000Z

343

Local stabilizer codes in three dimensions without string logical operators  

Science Conference Proceedings (OSTI)

We suggest concrete models for self-correcting quantum memory by reporting examples of local stabilizer codes in 3D that have no string logical operators. Previously known local stabilizer codes in 3D all have stringlike logical operators, which make the codes non-self-correcting. We introduce a notion of ''logical string segments'' to avoid difficulties in defining one-dimensional objects in discrete lattices. We prove that every stringlike logical operator of our code can be deformed to a disjoint union of short segments, each of which is in the stabilizer group. The code has surfacelike logical operators whose partial implementation has unsatisfied stabilizers along its boundary.

Haah, Jeongwan [Institute for Quantum Information, California Institute of Technology, Pasadena, California 91125 (United States)

2011-04-15T23:59:59.000Z

344

Anomalous Soft Photons Associated with Hadron Production in String Fragmentation  

Science Conference Proceedings (OSTI)

The bosonized QCD2+QED2 system for quarks with two flavors contains QCD2 and QED2 bound states, with an isoscalar photon at about 25 MeV and an isovector (I=1 J_{3}=0) photon at about 44 MeV. Consequently, when a quark and antiquark at the two ends of a string pulls apart from each other at high energies, hadrons and soft photons will be produced simultaneously in the fragmentation of the string. The production of the QED2 soft photons in association with hadrons may explain the anomalous soft photon data in hadron-hadron collisions and e^{+}-e^{-} annihilations at high energies.

Wong, Cheuk-Yin [ORNL

2011-01-01T23:59:59.000Z

345

Purely twistorial string with canonical twistor field quantization  

SciTech Connect

We introduce new purely twistorial scale-invariant action describing the composite bosonic D=4 Nambu-Goto string with target space parametrized by the pair of D=4 twistors. We show that by suitable gauge fixing of local scaling one gets the bilinear twistorial action and canonical quantization rules for the two-dimensional twistor-string fields. We consider the Poisson brackets of all constraints characterizing our model and we obtain four first class constraints describing two Virasoro constraints and two Kac-Moody local phase transformations.

Fedoruk, Sergey [Bogoliubov Laboratory of Theoretical Physics, JINR, 141980 Dubna, Moscow Region (Russian Federation); Lukierski, Jerzy [Institute for Theoretical Physics, University of Wroclaw, plac Maxa Borna 9, 50-204 Wroclaw (Poland)

2009-03-15T23:59:59.000Z

346

Generalized dilaton-Maxwell cosmic string and wall solutions  

E-Print Network (OSTI)

The class of static solutions found by Gibbons and Wells for dilaton-electrodynamics in flat spacetime, which describe nontopological strings and walls that trap magnetic flux, is extended to a class of dynamical solutions supporting arbitrarily large, nondissipative traveling waves, using techniques previously applied to global and local topological defects. These solutions can then be used in conjunction with S-duality to obtain more general solitonic solutions for various axidilaton-Maxwell theories. As an example, a set of dynamical solutions is found for axion, dilaton, and Maxwell fields in low energy heterotic string theory using the SL(2,R) invariance of the equations of motion.

John Morris

2006-08-15T23:59:59.000Z

347

Black holes and black strings in plane waves  

E-Print Network (OSTI)

We investigate the construction of black holes and black strings in vacuum plane wave spacetimes using the method of matched asymptotic expansions. We find solutions of the linearised equations of motion in the asymptotic region for a general source on a plane wave background. We observe that these solutions do not satisfy our previously defined conditions for being asymptotically plane wave. We consider the solution in the near region, treating the plane wave as a perturbation of a black object, and find that there is a regular black string solution but no regular black hole solution.

Witt, Julian Le

2009-01-01T23:59:59.000Z

348

Equivalence of string and fusion loop-spin structures  

E-Print Network (OSTI)

The importance of the fusion relation of loops was recognized in the context of spin structures on the loop space by Stolz and Teichner and further developed by Waldorf. On a spin manifold M the equivalence classes of `fusive' spin structures on the loop space LM, incorporating the fusion property, strong regularity and reparameterization-invariance, are shown to be in 1-1 correspondence with equivalence classes of string structures on M. The identification is through the affine space of `string' cohomology classes considered by Redden.

Chris Kottke; Richard Melrose

2013-09-01T23:59:59.000Z

349

Further results about field theory on the world sheet and string formation  

E-Print Network (OSTI)

O n The W o r l d Sheet A n d String Formation K o r k u tthe model has two phases: A string forming phase and acan be thought of as the string slope, which is now promoted

Bardakci, Korbut

2005-01-01T23:59:59.000Z

350

Lighting Research Center Lighting Products  

Science Conference Proceedings (OSTI)

... 12) Solid State Lighting Luminaires - Color Characteristic Measurements. [22/S04] IES LM-16:1993 Practical Guide to Colorimetry of Light Sources. ...

2013-07-26T23:59:59.000Z

351

Lighting Group: Light Distribution Systems  

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

Retrofit Alternatives to Incandescent Downlights Hotel and Institutional Bathroom Lighting Portable Office Lighting Systems Low Glare Outdoor Retrofit Luminaire LED Luminaires...

352

Outlaw lighting  

SciTech Connect

Demand-side management programs by utilities and the federal government`s Green Lights program have made significant inroads in promoting energy-efficient lighting. But the Energy Policy Act now prohibits certain types of lighting. This article provides analysis to help architects determine new lamp performance compared with older lighting products.

Bryan, H.

1994-12-01T23:59:59.000Z

353

Analytic Approaches to the Study of Small Scale Structure on Cosmic String Networks  

E-Print Network (OSTI)

We present an analytic model specifically designed to address the long standing issue of small scale structure on cosmic string networks. The model is derived from the microscopic string equations, together with a few motivated assumptions. The resulting form of the correlation between two points on a string is exploited to study smoothing by gravitational radiation, loop formation and lensing by cosmic strings. In addition, the properties of the small loop population and the possibility of detecting gravitational waves generated by their lowest harmonics are investigated. Whenever possible, we compare the predictions of the model to the most recent numerical simulations of cosmic string networks.

Jorge V. Rocha

2008-12-20T23:59:59.000Z

354

Classical worldsheets for string scattering on flat and AdS spacetime  

Science Conference Proceedings (OSTI)

We present a study of the worldsheets that describe the classical limit of various string scattering processes. Our main focus is on string scattering in AdS spacetime because of its relation via the AdS/CFT (anti-de Sitter/conformal field theory) correspondence to gluon scattering in N=4 supersymmetric Yang-Mills theory. But we also consider analogous processes in flat Minkowski spacetime which we compare to the AdS case. In addition to scattering of string by string we also find and study worldsheets describing the scattering of a string by external sources.

Sommerfield, Charles M.; Thorn, Charles B. [Institute for Fundamental Theory, Department of Physics, University of Florida, Gainesville Florida 32611 (United States)

2008-08-15T23:59:59.000Z

355

Status of Some Exact Results on Conformally Invariant Effective String Theories  

Science Conference Proceedings (OSTI)

Numerical studies of Flux Tubes in d = 3,4 QCD and the strong evidence thereby for them being described by free Bosonic String theory to order R{sup -}3, where R is the string length, will be briefly reviewed. The Polchinski-Strominger Effective String Theory approach and our recent work in constructing them to all orders will then be described. A proof will be presented that to all orders these theories have the same spectrum as free Bosonic String Theory. I will conclude my attempts to compliment these results on the basis of canonical QFT and the implications for QCD-Strings.

Dass, N. D. Hari [Centre for High Energy Physics, Indian Institute of Science, Bangalore 560012 (India)

2011-05-23T23:59:59.000Z

356

Study of highly-excited string states at the Large Hadron Collider  

E-Print Network (OSTI)

In TeV-scale gravity scenarios with large extra dimensions, black holes may be produced at future colliders. Good arguments have been made for why general relativistic black holes may be just out of reach of the Large Hadron Collider (LHC). However, in weakly-coupled string theory, highly excited string states - string balls - could be produced at the LHC with high rates and decay thermally, not unlike general relativistic black holes. In this paper, we simulate and study string ball production and decay at the LHC. We specifically emphasize the experimentally-detectable similarities and differences between string balls and general relativistic black holes at a TeV scale.

Douglas M. Gingrich; Kevin Martell

2008-08-19T23:59:59.000Z

357

T-duality Invariant Approaches to String Theory  

E-Print Network (OSTI)

This thesis investigates the quantum properties of T-duality invariant formalisms of String Theory. We introduce and review duality invariant formalisms of String Theory including the Doubled Formalism. We calculate the background field equations for the Doubled Formalism of Abelian T-duality and show how they are consistent with those of a conventional String Theory description of a toroidal compactification. We generalise these considerations to the case of Poisson--Lie T-duality and show that the system of renormalisation group equations obtained from the duality invariant parent theory are equivalent to those of either of the T-dual pair of sigma-models. In duality invariant formalisms it is quite common to loose manifest Lorentz invariance at the level of the Lagrangian. The lack of manifest invariance means that at the quantum level one might anticipate Lorentz anomalies and we show that such anomalies cancel non-trivially. These represent important and non-trivial consistency checks of the duality invariant approach to String Theory.

Daniel C. Thompson

2010-12-20T23:59:59.000Z

358

Effective string theory description of the interface free energy  

E-Print Network (OSTI)

We compare the predictions of the Nambu-Goto effective string model with a set of high precision Monte Carlo results for interfaces with periodic boundary conditions in the 3D Ising model. We compute the free energy in the covariant gauge exactly, up to the inclusion of the Liouville mode. The perturbative expansion of this result agrees both with the result evaluated several years ago by Dietz and Filk in the physical gauge and with a recent calculation with the Polchinski-Strominger action. We also derive the effective string spectrum which, because of the different boundary conditions, is very different from the well known one of Arvis. Taking into proper account the effective string corrections and exploiting some technical improvements in the simulations we obtain precise estimate of the amplitude ratios T_c/\\sqrt{sigma}, m_{0++}/\\sqrt{\\sigma} and sigma xi_{2nd}^2. We also discuss the behaviour of the effective string free energy in the dimensional reduction limit (i.e., near the deconfinement transition of the dual 3d gauge Ising model) and its relationship with the 2d Ising model interfaces

M. Billo; M. Caselle; L. Ferro; M. Hasenbusch; M. Panero

2007-10-09T23:59:59.000Z

359

Four-Qubit Entanglement Classification from String Theory  

Science Conference Proceedings (OSTI)

We invoke the black-hole-qubit correspondence to derive the classification of four-qubit entanglement. The U-duality orbits resulting from timelike reduction of string theory from D=4 to D=3 yield 31 entanglement families, which reduce to nine up to permutation of the four qubits.

Borsten, L.; Dahanayake, D.; Duff, M. J.; Rubens, W. [Theoretical Physics, Blackett Laboratory, Imperial College London, London SW7 2AZ (United Kingdom); Marrani, A. [Stanford Institute for Theoretical Physics, Stanford University, Stanford, California 94305-4060 (United States)

2010-09-03T23:59:59.000Z

360

Hadron potentials within the gauge/string correspondence  

Science Conference Proceedings (OSTI)

It is known, since the 70s, that the large N 't Hooft limit of gauge theories is related to string theories. In 1998, J. M. Maldacena identified precisely such a relation: the so-called AdS/CFT correspondence which speculates a duality between a large N strongly-coupled supersymmetric and conformal Yang-Mills theory in four dimensions and a weakly-coupled string theory defined in a five-dimensional anti-de Sitter AdS{sub 5} space-time. This review aims at introducing concepts and methods used to derive, in the framework of the gauge/string correspondence, the interaction potentials of mesons and baryons at zero and finite temperature. The dual string configurations associated with the different kinds of hadrons are described and their behaviours at short and large distances are understood. Although the application of Maldacena's AdS/CFT conjecture to QCD is not straightforward, QCD being neither supersymmetric nor conformal, the AdS/QCD correspondence approach attempts to identify the dual theory of QCD. Especially, the study of heavy quark-antiquark bound-states leads to establish general dual criteria for the confinement.

Jugeau, Frederic, E-mail: jugeau@ihep.ac.c [Institute of High Energy Physics, Chinese Academy of Sciences, P. O. Box 918(4), Beijing 100049 (China); Theoretical Physics Center for Science Facilities, Chinese Academy of Sciences, Beijing 100049 (China)

2010-08-15T23:59:59.000Z

Note: This page contains sample records for the topic "holiday light strings" 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

Parabosonic string and space-time non-commutativity  

Science Conference Proceedings (OSTI)

We investigate the para-quantum extension of the bosonic strings in a non-commutative space-time. We calculate the trilinear relations between the mass-center variables and the modes and we derive the Virasoro algebra where a new anomaly term due to the non-commutativity is obtained.

Seridi, M. A.; Belaloui, N. [Laboratoire de Physique Mathematique et Subatomique, Universite Mentouri Constantine (Algeria)

2012-06-27T23:59:59.000Z

362

String structures and trivialisations of a Pfaffian line bundle.  

E-Print Network (OSTI)

The present paper is a contribution to categorial index theory. Its main result is the calculation of the Pfaffian line bundle of a certain family of real Dirac operators as an object in the category of line bundles. Furthermore, it is shown how string structures give rise to trivialisations of that Pfaffian.

Ulrich Bunke

363

KO-Homology and Type I String Theory.  

E-Print Network (OSTI)

We study the classification of D-branes and Ramond-Ramond fields in Type I string theory by developing a geometric description of KO-homology. We define an analytic version of KO-homology using KK-theory of real C*-algebras, and construct explicitly the isomorphism between geometric and analytic KO-homology. The construction involves recasting the Cl(n)-index theorem and a certain geometric invariant into a homological framework which is used, along with a definition of the real Chern character in KO-homology, to derive cohomological index formulas. We show that this invariant also naturally assigns torsion charges to non-BPS states in Type I string theory, in the construction of classes of D-branes in terms of topological KO-cycles. The formalism naturally captures the coupling of Ramond-Ramond fields to background D-branes which cancel global anomalies in the string theory path integral. We show that this is related to a physical interpretation of bivariant KK-theory in terms of decay processes on spacetime-filling branes. We also provide a construction of the holonomies of Ramond-Ramond fields in Type II string theory in terms of topological K-chains.

364

String-Like Lagrangians from a Generalized Geometry  

E-Print Network (OSTI)

This note will use Hitchin's generalized geometry and a model of axionic gravity developed by Warren Siegel in the mid-nineties to show that the construction of Lagrangians based on the inner product arising from the pairing of a vector and its dual can lead naturally to the low-energy Lagrangian of the bosonic string.

Stephen Morris

2007-10-03T23:59:59.000Z

365

Renewal theory in analysis of tries and strings  

E-Print Network (OSTI)

We give a survey of a number of simple applications of renewal theory to problems on random strings and tries: insertion depth, size, insertion mode and imbalance of tries; variations for b-tries and Patricia tries; Khodak and Tunstall codes.

Janson, Svante

2009-01-01T23:59:59.000Z

366

Induced vacuum current and magnetic field in the background of a cosmic string  

E-Print Network (OSTI)

Vacuum polarization effects in the cosmic string background are considered. We find that a current is induced in the vacuum of the quantized massive scalar field and that the current circulates around the string which is generalized to a $(d-2)$-brane in locally flat $(d+1)$-dimensional space-time. As a consequence of the Maxwell equation, a magnetic field strength is also induced in the vacuum and is directed along the cosmic string. The dependence of the current and the field strength on the string flux and tension is comprehensively analyzed. Both the current and the field strength are holomorphic functions of the space dimension, decreasing exponentially with the distance from the string. In the case of $d=3$ we show that, due to the vacuum polarization, the cosmic string is enclosed in a tube of the magnetic flux lines if the mass of the quantized field is less than the inverse of the transverse size of the string core.

Yu. A. Sitenko; N. D. Vlasii

2009-09-02T23:59:59.000Z

367

Conformal SO(2,4) Transformations for the Helical AdS String Solution  

E-Print Network (OSTI)

By applying the conformal SO(2,4) transformations to the folded rotating string configuration with two spins given by a certain limit from the helical string solution in AdS_3 x S^1, we construct new string solutions whose energy-spin relations are characterized by the boost parameter. When two SO(2,4) transformations are performed with two boost parameters suitably chosen, the straight folded rotating string solution with one spin in AdS_3 is transformed in the long string limit into the long spiky string solution whose expression is given from the helical string solution in AdS_3 by making a limit that the modulus parameter becomes unity.

Ryang, Shijong

2008-01-01T23:59:59.000Z

368

Lighting Controls  

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

corridors. The overall range of savings was six to 80 percent. The Advanced Lighting Guidelines On-Line Edition New Buildings Institute 2011 presents a table of lighting energy...

369

Shape the light, light the shape - lighting installation in performance.  

E-Print Network (OSTI)

??This thesis investigates the lighting design theory Light Inside Out, which is the technique of shaping light toward a creation of lighting installation in performance… (more)

Yu, Lih-Hwa, 1972-

2010-01-01T23:59:59.000Z

370

Lighting Systems  

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

Purple LED lamp Purple LED lamp Lighting Systems Lighting research is aimed at improving the energy efficiency of lighting systems in buildings and homes across the nation. The goal is to reduce lighting energy consumption by 50% over twenty years by improving the efficiency of light sources, and controlling and delivering illumination so that it is available, where and when needed, and at the required intensity. Research falls into four main areas: Sources and Ballasts, Light Distribution Systems, Controls and Communications, and Human Factors. Contacts Francis Rubinstein FMRubinstein@lbl.gov (510) 486-4096 Links Lighting Research Group Batteries and Fuel Cells Buildings Energy Efficiency Applications Commercial Buildings Cool Roofs and Heat Islands Demand Response Energy Efficiency Program and Market Trends

371

Semiclassical rigid strings with two spins in AdS{sub 5}  

Science Conference Proceedings (OSTI)

Semiclassical spinning string states in AdS{sub 5} are, in general, characterized by the three SO(2,4) conserved charges: the energy E and the two spins S{sub 1} and S{sub 2}. We discuss several examples of explicit classical solutions for rigid closed strings of (bended) circular shape with two nonzero spins. In particular, we identify a solution that should represent a state that has minimal energy for large values of the two equal spins. Similarly to the spiky string in AdS{sub 3}, in the large-spin limit this string develops long 'arcs' that stretch towards the boundary of AdS{sub 5}. This allows the string to increase the spin while having the energy growing only logarithmically with S=S{sub 1}+S{sub 2}. The large-spin asymptotics of such solutions is effectively controlled by their near-boundary parts which, as in the spiky string case, happen to be SO(2,4) equivalent to segments of the straight folded spinning string. As a result, the coefficient of the logS term in the string energy should be given, up to an overall 3/2 coefficient, by the same universal scaling function (cusp anomaly) as in the folded string case, to all orders in the inverse string tension or strong-coupling expansion.

Tirziu, A. [Department of Physics, Purdue University, West Lafayette, Indiana 47907-2036 (United States); Tseytlin, A. A. [Blackett Laboratory, Imperial College, London SW7 2AZ (United Kingdom)

2010-01-15T23:59:59.000Z

372

Gamma-ray bursts, axion emission and string theory dilaton  

E-Print Network (OSTI)

The emission of axions from supernovae is an interesting possibility to account for the Gamma-Ray Bursts provided their energy can be effectively converted into electromagnetic energy elsewhere. The connection between supernova and gamma-ray bursts has been recently confirmed by the observed correlation between the burst of April 25, 1998 and the supernova SN1998bw. We argue that the axion convertion into photons can be more efficient if one considers the coupling between an intermediate scale axion and the string theory dilaton along with the inclusion of string loops. We also discuss the way dilaton dynamics may allow for a more effective energy exchange with electromagnetic radiation in the expansion process of fireballs.

O. Bertolami

1999-01-14T23:59:59.000Z

373

On the stability of the primordial closed string gas  

E-Print Network (OSTI)

We recast the study of a closed string gas in a toroidal container in the physical situation in which the single string density of states is independent of the volume because energy density is very high. This includes the gas for the well known Brandenberger-Vafa cosmological scenario. We describe the gas in the grandcanonical and microcanonical ensembles. In the microcanonical description, we find a result that clearly confronts the Brandenberger-Vafa calculation to get the specific heat of the system. The important point is that we use the same approach to the problem but a different regularization. By the way, we show that, in the complex temperature formalism, at the Hagedorn singularity, the analytic structure obtained from the so-called F-representation of the free energy coincides with the one computed using the S-representation.

Manuel A. Cobas; M. A. R. Osorio; María Suárez

2005-07-08T23:59:59.000Z

374

Semi-classical Probe Strings on Giant Gravitons Backgrounds  

E-Print Network (OSTI)

In the first part of this paper we study two $Z_2$ symmetries of the LLM metric, both of which exchange black and white regions. One of them which can be interpreted as the particle-hole symmetry is the symmetry of the whole supergravity solution while the second one is just the symmetry of the metric and changes the sign of the fivefrom flux. In the second part of the paper we use closed string probes and their semi-classical analysis to compare the two 1/2 BPS deformations of $AdS_5\\times S^5$, the smooth LLM geometry which contains localized giant gravitons and the superstar case which is a solution with naked singularity corresponding to smeared giants. We discuss the realization of the $Z_2$ symmetry in the semi-classical closed string probes point of view.

M. Alishahiha; H. Ebrahim; B. Safarzadeh; M. M. Sheikh-Jabbari

2005-09-20T23:59:59.000Z

375

Semi-classical Probe Strings on Giant Gravitons Backgrounds  

E-Print Network (OSTI)

In the first part of this paper we study two $Z_2$ symmetries of the LLM metric, both of which exchange black and white regions. One of them which can be interpreted as the particle-hole symmetry is the symmetry of the whole supergravity solution while the second one is just the symmetry of the metric and changes the sign of the fivefrom flux. In the second part of the paper we use closed string probes and their semi-classical analysis to compare the two 1/2 BPS deformations of $AdS_5\\times S^5$, the smooth LLM geometry which contains localized giant gravitons and the superstar case which is a solution with naked singularity corresponding to smeared giants. We discuss the realization of the $Z_2$ symmetry in the semi-classical closed string probes point of view.

Alishahiha, M; Safarzadeh, B; Sheikh-Jabbari, M M

2005-01-01T23:59:59.000Z

376

Open parabosonic string theory between two parallel Dp-branes  

Science Conference Proceedings (OSTI)

We investigate an open parabosonic string theory between two parallel Dp-branes. The spectrum is constructed and the partition function is derived. A common chord between the development of this latter and the degeneracy of the states for each mass level is obtained. The theory is consistent and with no tachyon. The Virasoro algebra is derived and compared to the one of the ordinary case.

Hamam, D.; Belaloui, N. [Laboratoire de Physique Theorique, Universite de Jijel (Algeria); Laboratoire de Physique Mathematique et Subatomique, Universite Mentouri Constantine (Algeria)

2012-06-27T23:59:59.000Z

377

Charged string solutions with dilaton and modulus fields  

E-Print Network (OSTI)

We find charged, abelian, spherically symmetric solutions (in flat space-time) corresponding to the effective action of $D=4$ heterotic string theory with scale-dependent dilaton $\\p$ and modulus $\\vp$ fields. We take into account perturbative (genus-one), moduli-dependent `threshold' corrections to the coupling function $f(\\p,\\vp)$ in the gauge field kinetic term $f(\\p,\\vp) F^2_{\\m\

Cvetic, M

1994-01-01T23:59:59.000Z

378

Duality in quantum field theory (and string theory)  

Science Conference Proceedings (OSTI)

These lectures give an introduction to duality in Quantum Field Theory. We discuss the phases of gauge theories and the implications of the electric-magnetic duality transformation to describe the mechanism of confinement. We review the exact results of N=1 supersymmetric QCD and the Seiberg-Witten solution of N=2 super Yang-Mills. Some of its extensions to String Theory are also briefly discussed.

Luis Álvarez-Gaumé; Frederic Zamora

1998-01-01T23:59:59.000Z

379

Experiences with string matching on the Fermi Architecture  

Science Conference Proceedings (OSTI)

String matching is at the core of many real-world applications, such as security, bioinformatic, data mining. All these applications requires the ability to match always growing data sets against large dictionaries effectively, fastly and possibly in real time. Unfortunately, string matching is a computationally intensive procedure which poses significant challenges on current software and hardware implementations. Graphic Processing Units (GPU) have become an interesting target for such high-throughput applications, but the algorithms and the data structures need to be redesigned to be parallelized and adapted to the underlining hardware, coping with the limitations imposed by these architectures. In this paper we present an efficient implementation of the Aho-Corasick string matching algorithm on GPU, showing how we progressively redesigned the algorithm and the data structures to fit on the architecture. We then evaluate the implementation on single and multiple Tesla C2050 (T20 ``Fermi'' based) boards, comparing them to the previous Tesla C1060 (T10 based) solutions and equivalent multicore implementations on x86 CPUs. We discuss the various tradeoffs of the different architectures.

Tumeo, Antonino; Secchi, Simone; Villa, Oreste

2011-02-25T23:59:59.000Z

380

How to avoid casing collapse during inner string cementing  

Science Conference Proceedings (OSTI)

This article reports that in the Mobile Bay area offshore Alabama, inflatable surface packoffs are being used to seal the top of the 20-in. conductor casing-to-drill pipe annulus. With the seal in place, annular pressure is maintained during inner string cementing jobs to counter forces that tend to shorten the drill pipe inner string. Inside pressure also helps protect the casing from collapse due to the hydrostatic pressure of a long column of cement. Casing is less resistant than the bottom of the hole and the wellbore, (unless a weak formation breaks down) and can crush under the hydrostatic weight when fluid inside does not offer enough offsetting support. Casing collapse can cause cement to leak into the casing-to-drill pipe annulus, thereby cementing the drill string in the well or otherwise ruining the cement job. In a situation where casing does not have sufficient collapse resistance to withstand hydrostatic pressure loading, a surface packoff can be used to maintain pressure inside the casing throughout the cementing job.

Lubitz, R.

1987-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "holiday light strings" 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

Commercial Lighting and LED Lighting Incentives  

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

Incentives for energy efficient commercial lighting equipment as well as commercial LED lighting equipment are available to businesses under the Efficiency Vermont Lighting and LED Lighting...

382

Constraints on cosmic (super)strings from the LIGO-Virgo gravitational-wave detectors  

E-Print Network (OSTI)

Cosmic string cusps produce powerful bursts of gravitational waves (GWs). These bursts provide the most promising observational signature of cosmic strings. In this letter we report stringent limits on cosmic string models obtained from the analysis of 625 days of observation with the LIGO and Virgo GW detectors. A significant fraction of the cosmic string parameter space is ruled out. This result complements and improves existing limits from searches for a stochastic background of GWs using cosmic microwave background and pulsar timing data. In particular, if the size of loops is given by gravitational back-reaction, we place upper limits on the string tension $G\\mu$ below $10^{-8}$ in some regions of the cosmic string parameter space.

J. Aasi; J. Abadie; B. P. Abbott; R. Abbott; T. Abbott; M. R. Abernathy; T. Accadia; F. Acernese; C. Adams; T. Adams; R. X. Adhikari; C. Affeldt; M. Agathos; N. Aggarwal; O. D. Aguiar; P. Ajith; B. Allen; A. Allocca; E. Amador Ceron; D. Amariutei; R. A. Anderson; S. B. Anderson; W. G. Anderson; K. Arai; M. C. Araya; C. Arceneaux; J. Areeda; S. Ast; S. M. Aston; P. Astone; P. Aufmuth; C. Aulbert; L. Austin; B. E. Aylott; S. Babak; P. T. Baker; G. Ballardin; S. W. Ballmer; J. C. Barayoga; D. Barker; S. H. Barnum; F. Barone; B. Barr; L. Barsotti; M. Barsuglia; M. A. Barton; I. Bartos; R. Bassiri; A. Basti; J. Batch; J. Bauchrowitz; Th. S. Bauer; M. Bebronne; B. Behnke; M. Bejger; M. G. Beker; A. S. Bell; C. Bell; I. Belopolski; G. Bergmann; J. M. Berliner; D. Bersanetti; A. Bertolini; D. Bessis; J. Betzwieser; P. T. Beyersdorf; T. Bhadbhade; I. A. Bilenko; G. Billingsley; J. Birch; M. Bitossi; M. A. Bizouard; E. Black; J. K. Blackburn; L. Blackburn; D. Blair; M. Blom; O. Bock; T. P. Bodiya; M. Boer; C. Bogan; C. Bond; F. Bondu; L. Bonelli; R. Bonnand; R. Bork; M. Born; V. Boschi; S. Bose; L. Bosi; J. Bowers; C. Bradaschia; P. R. Brady; V. B. Braginsky; M. Branchesi; C. A. Brannen; J. E. Brau; J. Breyer; T. Briant; D. O. Bridges; A. Brillet; M. Brinkmann; V. Brisson; M. Britzger; A. F. Brooks; D. A. Brown; D. D. Brown; F. Brückner; T. Bulik; H. J. Bulten; A. Buonanno; D. Buskulic; C. Buy; R. L. Byer; L. Cadonati; G. Cagnoli; J. Calderón Bustillo; E. Calloni; J. B. Camp; P. Campsie; K. C. Cannon; B. Canuel; J. Cao; C. D. Capano; F. Carbognani; L. Carbone; S. Caride; A. Castiglia; S. Caudill; M. Cavagliá; F. Cavalier; R. Cavalieri; G. Cella; C. Cepeda; E. Cesarini; R. Chakraborty; T. Chalermsongsak; S. Chao; P. Charlton; E. Chassande-Mottin; X. Chen; Y. Chen; A. Chincarini; A. Chiummo; H. S. Cho; J. Chow; N. Christensen; Q. Chu; S. S. Y. Chua; S. Chung; G. Ciani; F. Clara; D. E. Clark; J. A. Clark; F. Cleva; E. Coccia; P. -F. Cohadon; A. Colla; M. Colombini; M. Constancio Jr.; A. Conte; R. Conte; D. Cook; T. R. Corbitt; M. Cordier; N. Cornish; A. Corsi; C. A. Costa; M. W. Coughlin; J. -P. Coulon; S. Countryman; P. Couvares; D. M. Coward; M. Cowart; D. C. Coyne; K. Craig; J. D. E. Creighton; T. D. Creighton; S. G. Crowder; A. Cumming; L. Cunningham; E. Cuoco; K. Dahl; T. Dal Canton; M. Damjanic; S. L. Danilishin; S. D'Antonio; K. Danzmann; V. Dattilo; B. Daudert; H. Daveloza; M. Davier; G. S. Davies; E. J. Daw; R. Day; T. Dayanga; R. De Rosa; G. Debreczeni; J. Degallaix; W. Del Pozzo; E. Deleeuw; S. Deléglise; T. Denker; T. Dent; H. Dereli; V. Dergachev; R. DeRosa; R. DeSalvo; S. Dhurandhar; L. Di Fiore; A. Di Lieto; I. Di Palma; A. Di Virgilio; M. Díaz; A. Dietz; K. Dmitry; F. Donovan; K. L. Dooley; S. Doravari; M. Drago; R. W. P. Drever; J. C. Driggers; Z. Du; J. -C. Dumas; S. Dwyer; T. Eberle; M. Edwards; A. Effler; P. Ehrens; J. Eichholz; S. S. Eikenberry; G. Endröczi; R. Essick; T. Etzel; K. Evans; M. Evans; T. Evans; M. Factourovich; V. Fafone; S. Fairhurst; Q. Fang; S. Farinon; B. Farr; W. Farr; M. Favata; D. Fazi; H. Fehrmann; D. Feldbaum; I. Ferrante; F. Ferrini; F. Fidecaro; L. S. Finn; I. Fiori; R. Fisher; R. Flaminio; E. Foley; S. Foley; E. Forsi; N. Fotopoulos; J. -D. Fournier; S. Franco; S. Frasca; F. Frasconi; M. Frede; M. Frei; Z. Frei; A. Freise; R. Frey; T. T. Fricke; P. Fritschel; V. V. Frolov; M. -K. Fujimoto; P. Fulda; M. Fyffe; J. Gair; L. Gammaitoni; J. Garcia; F. Garufi; N. Gehrels; G. Gemme; E. Genin; A. Gennai; L. Gergely; S. Ghosh; J. A. Giaime; S. Giampanis; K. D. Giardina; A. Giazotto; S. Gil-Casanova; C. Gill; J. Gleason; E. Goetz; R. Goetz; L. Gondan; G. González; N. Gordon; M. L. Gorodetsky; S. Gossan; S. Goßler; R. Gouaty; C. Graef; P. B. Graff; M. Granata; A. Grant; S. Gras; C. Gray; R. J. S. Greenhalgh; A. M. Gretarsson; C. Griffo; P. Groot; H. Grote; K. Grover; S. Grunewald; G. M. Guidi; C. Guido; K. E. Gushwa; E. K. Gustafson; R. Gustafson; B. Hall; E. Hall; D. Hammer; G. Hammond; M. Hanke; J. Hanks; C. Hanna; J. Hanson; J. Harms; G. M. Harry; I. W. Harry; E. D. Harstad; M. T. Hartman; K. Haughian; K. Hayama; J. Heefner; A. Heidmann; M. Heintze; H. Heitmann; P. Hello; G. Hemming; M. Hendry; I. S. Heng; A. W. Heptonstall; M. Heurs; S. Hild; D. Hoak; K. A. Hodge; K. Holt; M. Holtrop; T. Hong; S. Hooper; T. Horrom; D. J. Hosken; J. Hough; E. J. Howell; Y. Hu; Z. Hua; V. Huang; E. A. Huerta; B. Hughey; S. Husa; S. H. Huttner; M. Huynh; T. Huynh-Dinh; J. Iafrate; D. R. Ingram; R. Inta; T. Isogai; A. Ivanov; B. R. Iyer; K. Izumi; M. Jacobson; E. James; H. Jang; Y. J. Jang; P. Jaranowski; F. Jiménez-Forteza; W. W. Johnson; D. Jones; D. I. Jones; R. Jones; R. J. G. Jonker; L. Ju; Haris K; P. Kalmus; V. Kalogera; S. Kandhasamy; G. Kang; J. B. Kanner; M. Kasprzack; R. Kasturi; E. Katsavounidis; W. Katzman; H. Kaufer; K. Kaufman; K. Kawabe; S. Kawamura; F. Kawazoe

2013-10-09T23:59:59.000Z

383

hep-th/0407046 Local Commutativity and Causality in Interacting PP-wave String Field Theory  

E-Print Network (OSTI)

Abstract: In this paper, we extend our previous study of causality and local commutativity of string fields in the pp-wave lightcone string field theory to include interaction. Contrary to the flat space case result of Lowe, Polchinski, Susskind, Thorlacius and Uglum, we found that the pp-wave interaction does not affect the local commutativity condition. Our results show that the pp-wave lightcone string field theory is not continuously connected with the flat space one. We also discuss the relation between the condition of local commutativity and causality. While the two notions are closely related in a point particle theory, their relation is less clear in string theory. We suggest that string local commutativity may be relevant for an operational defintion of causality using strings as

Chong-sun Chu; Konstantinos Kyritsis

2004-01-01T23:59:59.000Z

384

Unstable rotational states of string models and width of a hadron  

Science Conference Proceedings (OSTI)

Rotational states (planar uniform rotations) of various string hadron models are tested for stability with respect to small disturbances. These models include an open or closed string carrying n massive points (quarks), and their rotational states result in a set of quasilinear Regge trajectories. It is shown that rotations of the linear string baryon model q-q-q and the similar states of the closed string are unstable, because spectra of small disturbances for these states contain complex frequencies, corresponding to exponentially growing modes of disturbances. Rotations of the linear model are unstable for any values of points' masses, but for the closed string we have the threshold effect. This instability is important for describing excited hadrons; in particular, it increases predictions for their width {gamma}. Predicted large values {gamma} for N, {delta} and strange baryons in comparison with experimental data result in unacceptability of the linear string model q-q-q for describing these baryon states.

Sharov, G. S. [Tver State University, 170002, Sadovyj per. 35, Tver (Russian Federation)

2009-06-01T23:59:59.000Z

385

Forecast constraints on cosmic string parameters from gravitational wave direct detection experiments  

E-Print Network (OSTI)

Gravitational waves (GWs) are one of the key signatures of cosmic strings. If GWs from cosmic strings are detected in future experiments, not only their existence can be confirmed but also their properties might be probed. In this paper, we study the determination of cosmic string parameters through direct detection of GW signatures in future ground-based GW experiments. We consider two types of GWs, bursts and the stochastic GW background, which provide us with different information about cosmic string properties. Performing the Fisher matrix calculation on the cosmic string parameters, such as parameters governing the string tension $G\\mu$ and initial loop size $\\alpha$ and the reconnection probability $p$, we find that the two different types of GW can break degeneracies in some of these parameters and provide better constraints than those from each measurement.

Sachiko Kuroyanagi; Koichi Miyamoto; Toyokazu Sekiguchi; Keitaro Takahashi; Joseph Silk

2012-02-14T23:59:59.000Z

386

Constraints on cosmic (super)strings from the LIGO-Virgo gravitational-wave detectors  

E-Print Network (OSTI)

Cosmic string cusps produce powerful bursts of gravitational waves (GWs). These bursts provide the most promising observational signature of cosmic strings. In this letter we report stringent limits on cosmic string models obtained from the analysis of 625 days of observation with the LIGO and Virgo GW detectors. A significant fraction of the cosmic string parameter space is ruled out. This result complements and improves existing limits from searches for a stochastic background of GWs using cosmic microwave background and pulsar timing data. In particular, if the size of loops is given by gravitational back-reaction, we place upper limits on the string tension $G\\mu$ below $10^{-8}$ in some regions of the cosmic string parameter space.

Aasi, J; Abbott, B P; Abbott, R; Abbott, T; Abernathy, M R; Accadia, T; Acernese, F; Adams, C; Adams, T; Adhikari, R X; Affeldt, C; Agathos, M; Aggarwal, N; Aguiar, O D; Ajith, P; Allen, B; Allocca, A; Ceron, E Amador; Amariutei, D; Anderson, R A; Anderson, S B; Anderson, W G; Arai, K; Araya, M C; Arceneaux, C; Areeda, J; Ast, S; Aston, S M; Astone, P; Aufmuth, P; Aulbert, C; Austin, L; Aylott, B E; Babak, S; Baker, P T; Ballardin, G; Ballmer, S W; Barayoga, J C; Barker, D; Barnum, S H; Barone, F; Barr, B; Barsotti, L; Barsuglia, M; Barton, M A; Bartos, I; Bassiri, R; Basti, A; Batch, J; Bauchrowitz, J; Bauer, Th S; Bebronne, M; Behnke, B; Bejger, M; Beker, M G; Bell, A S; Bell, C; Belopolski, I; Bergmann, G; Berliner, J M; Bersanetti, D; Bertolini, A; Bessis, D; Betzwieser, J; Beyersdorf, P T; Bhadbhade, T; Bilenko, I A; Billingsley, G; Birch, J; Bitossi, M; Bizouard, M A; Black, E; Blackburn, J K; Blackburn, L; Blair, D; Blom, M; Bock, O; Bodiya, T P; Boer, M; Bogan, C; Bond, C; Bondu, F; Bonelli, L; Bonnand, R; Bork, R; Born, M; Boschi, V; Bose, S; Bosi, L; Bowers, J; Bradaschia, C; Brady, P R; Braginsky, V B; Branchesi, M; Brannen, C A; Brau, J E; Breyer, J; Briant, T; Bridges, D O; Brillet, A; Brinkmann, M; Brisson, V; Britzger, M; Brooks, A F; Brown, D A; Brown, D D; Brückner, F; Bulik, T; Bulten, H J; Buonanno, A; Buskulic, D; Buy, C; Byer, R L; Cadonati, L; Cagnoli, G; Bustillo, J Calderón; Calloni, E; Camp, J B; Campsie, P; Cannon, K C; Canuel, B; Cao, J; Capano, C D; Carbognani, F; Carbone, L; Caride, S; Castiglia, A; Caudill, S; Cavagliá, M; Cavalier, F; Cavalieri, R; Cella, G; Cepeda, C; Cesarini, E; Chakraborty, R; Chalermsongsak, T; Chao, S; Charlton, P; Chassande-Mottin, E; Chen, X; Chen, Y; Chincarini, A; Chiummo, A; Cho, H S; Chow, J; Christensen, N; Chu, Q; Chua, S S Y; Chung, S; Ciani, G; Clara, F; Clark, D E; Clark, J A; Cleva, F; Coccia, E; Cohadon, P -F; Colla, A; Colombini, M; Constancio, M; Conte, A; Conte, R; Cook, D; Corbitt, T R; Cordier, M; Cornish, N; Corsi, A; Costa, C A; Coughlin, M W; Coulon, J -P; Countryman, S; Couvares, P; Coward, D M; Cowart, M; Coyne, D C; Craig, K; Creighton, J D E; Creighton, T D; Crowder, S G; Cumming, A; Cunningham, L; Cuoco, E; Dahl, K; Canton, T Dal; Damjanic, M; Danilishin, S L; D'Antonio, S; Danzmann, K; Dattilo, V; Daudert, B; Daveloza, H; Davier, M; Davies, G S; Daw, E J; Day, R; Dayanga, T; De Rosa, R; Debreczeni, G; Degallaix, J; Del Pozzo, W; Deleeuw, E; Deléglise, S; Denker, T; Dent, T; Dereli, H; Dergachev, V; DeRosa, R; DeSalvo, R; Dhurandhar, S; Di Fiore, L; Di Lieto, A; Di Palma, I; Di Virgilio, A; Díaz, M; Dietz, A; Dmitry, K; Donovan, F; Dooley, K L; Doravari, S; Drago, M; Drever, R W P; Driggers, J C; Du, Z; Dumas, J -C; Dwyer, S; Eberle, T; Edwards, M; Effler, A; Ehrens, P; Eichholz, J; Eikenberry, S S; Endröczi, G; Essick, R; Etzel, T; Evans, K; Evans, M; Evans, T; Factourovich, M; Fafone, V; Fairhurst, S; Fang, Q; Farinon, S; Farr, B; Farr, W; Favata, M; Fazi, D; Fehrmann, H; Feldbaum, D; Ferrante, I; Ferrini, F; Fidecaro, F; Finn, L S; Fiori, I; Fisher, R; Flaminio, R; Foley, E; Foley, S; Forsi, E; Fotopoulos, N; Fournier, J -D; Franco, S; Frasca, S; Frasconi, F; Frede, M; Frei, M; Frei, Z; Freise, A; Frey, R; Fricke, T T; Fritschel, P; Frolov, V V; Fujimoto, M -K; Fulda, P; Fyffe, M; Gair, J; Gammaitoni, L; Garcia, J; Garufi, F; Gehrels, N; Gemme, G; Genin, E; Gennai, A; Gergely, L; Ghosh, S; Giaime, J A; Giampanis, S; Giardina, K D; Giazotto, A; Gil-Casanova, S; Gill, C; Gleason, J; Goetz, E; Goetz, R; Gondan, L; González, G; Gordon, N; Gorodetsky, M L; Gossan, S; Goßler, S; Gouaty, R; Graef, C; Graff, P B; Granata, M; Grant, A; Gras, S; Gray, C; Greenhalgh, R J S; Gretarsson, A M; Griffo, C; Groot, P; Grote, H; Grover, K; Grunewald, S; Guidi, G M; Guido, C; Gushwa, K E; Gustafson, E K; Gustafson, R; Hall, B; Hall, E; Hammer, D; Hammond, G; Hanke, M; Hanks, J; Hanna, C; Hanson, J; Harms, J; Harry, G M; Harry, I W; Harstad, E D; Hartman, M T; Haughian, K; Hayama, K; Heefner, J; Heidmann, A; Heintze, M; Heitmann, H; Hello, P; Hemming, G; Hendry, M; Heng, I S; Heptonstall, A W; Heurs, M; Hild, S; Hoak, D; Hodge, K A; Holt, K; Holtrop, M; Hong, T; Hooper, S; Horrom, T; Hosken, D J; Hough, J; Howell, E J; Hu, Y; Hua, Z; Huang, V; Huerta, E A; Hughey, B; Husa, S; Huttner, S H; Huynh, M; Huynh-Dinh, T; Iafrate, J; Ingram, D R; Inta, R; Isogai, T; Ivanov, A; Iyer, B R; Izumi, K; Jacobson, M; James, E; Jang, H; Jang, Y J; Jaranowski, P; Jiménez-Forteza, F; Johnson, W W; Jones, D; Jones, D I; Jones, R; Jonker, R J G; Ju, L; K, Haris; Kalmus, P; Kalogera, V; Kandhasamy, S; Kang, G; Kanner, J B; Kasprzack, M; Kasturi, R; Katsavounidis, E; Katzman, W; Kaufer, H; Kaufman, K; Kawabe, K; Kawamura, S; Kawazoe, F; Kéfélian, F; Keitel, D; Kelley, D B; Kells, W; Keppel, D G; Khalaidovski, A; Khalili, F Y; Khazanov, E A; Kim, B K; Kim, C; Kim, K

2013-01-01T23:59:59.000Z

387

Resonant acoustic transducer and driver system for a well drilling string communication system  

DOE Patents (OSTI)

The acoustic data communication system includes an acoustic transmitter and receiver wherein low frequency acoustic waves, propagating in relatively loss free manner in well drilling string piping, are efficiently coupled to the drill string and propagate at levels competitive with the levels of noise generated by drilling machinery also present in the drill string. The transmitting transducer incorporates a mass-spring piezoelectric transmitter and amplifier combination that permits self-oscillating resonant operation in the desired low frequency range.

Chanson, Gary J. (Weston, MA); Nicolson, Alexander M. (Concord, MA)

1981-01-01T23:59:59.000Z

388

Finite temperature solitons in nonlocal field theories from p-adic strings  

Science Conference Proceedings (OSTI)

Nonlocal field theories which arise from p-adic string theories have vacuum soliton solutions. We find the soliton solutions at finite temperature. These solutions become important for the partition function when the temperature exceeds m{sub s}/g{sub o}{sup 2}, where m{sub s} is the string mass scale and g{sub o} is the open string coupling.

Biswas, Tirthabir [Department of Physics, St. Cloud State University, St. Cloud, Minnesota 56301 (United States); Cembranos, Jose A. R. [William I. Fine Theoretical Physics Institute, University of Minnesota, Minneapolis, Minnesota 55455 (United States); School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455 (United States); Kapusta, Joseph I. [School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455 (United States)

2010-10-15T23:59:59.000Z

389

The HOL Light System REFERENCE  

E-Print Network (OSTI)

This volume is the reference manual for the HOL Light system. In contrast to the Tutorial, it is mainly intended for reference purposes, though some readers will find it productive to browse through it as part of the learning process. The main entries for the reference manual are generated from the same database that is used by the online HOL Light help system. The entries that follow provide documentation on essentially all the pre-defined ML variable bindings in the HOL Light system. These include: general-purpose functions, such as ML functions for list processing, arithmetic, input/output, and interface configuration; functions for processing the types and terms of the HOL logic and for using the subgoal package; primitive and derived forward inference rules; tactics and tacticals; and pre-proved built-in theorems. The manual entries for these ML identifiers are divided into two chapters. The first chapter is an alphabetical sequence of manual entries for all ML identifiers in the system except those identifiers that are bound to theorems (or pairs of theorems, etc.) The theorems are listed in the second chapter, roughly grouped into sections based on subject matter. Our documentation does not cover basic functions in the OCaml toplevel, such as addition, string concatenation etc. In fact, relatively few native OCaml functions are used, and those are all documented in the Objective CAML Reference Manual:

Tom Melham; Larry Paulson The Typeset

2013-01-01T23:59:59.000Z

390

Energy Distribution of a Black Hole Solution in Heterotic String Theory  

E-Print Network (OSTI)

We calculate the energy distribution of a charged black hole solution in heterotic string theory in the M{\\o}ller prescription.

I. Radinschi

2003-02-12T23:59:59.000Z

391

Simulated random surfaces and effective string models in 3D Z(2) gauge theory  

E-Print Network (OSTI)

All-order strong coupling simulations have been used to derive precise energies of string states in the confined phase of three dimensional Z(2) lattice gauge theory. The behavior of the ground state energy is here compared with predictions of effective string theory. Our new data reported here are consistent with known universal terms of the long string length ($L_0$) expansion known from effective string models in the continuum limit. Our precision is however still not sufficient to disentangle non-univeral terms of order $L_0^{-7}

Tomasz Korzec; Ulli Wolff

2013-09-05T23:59:59.000Z

392

Report on ignitability testing of flammable gasses in a core sampling drill string  

DOE Green Energy (OSTI)

This document describes the results from testing performed at the Pittsburgh Research Center to determine the effects of an ignition of flammable gasses contained in a core sampling drill string. Testing showed that 1) An ignition of stoichiometric hydrogen and air in a vented 30 or 55 ft length of drill string will not force 28`` or more of water out the bottom of the drill string, and 2) An ignition of this same gas mixture will not rupture a vented or completely sealed drill string.

Witwer, K.S., Westinghouse Hanford

1996-12-01T23:59:59.000Z

393

Northern Lights  

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

Northern Lights Northern Lights Nature Bulletin No. 178-A February 6, 1965 Forest Preserve District of Cook County Seymour Simon, President Roland F. Eisenbeis, Supt. of Conservation NORTHERN LIGHTS To a person seeing the Aurora Borealis or "northern lights" for the first time, it is an uncanny awe-inspiring spectacle. Sometimes it begins as a glow of red on the northern horizon, ominously suggesting a great fire, gradually changing to a curtain of violet-white, or greenish-yellow light extending from east to west. Some times this may be transformed to appear as fold upon fold of luminous draperies that march majestically across the sky; sometimes as a vast multitude of gigantic flaming swords furiously slashing at the heavens; sometimes as a flowing crown with long undulating colored streamers fanning downward and outward.

394

A novel string-derived Z with stable proton, light neutrinos ... - Springer  

Science Conference Proceedings (OSTI)

Dec 4, 2007 ... Higgs doublets; be anomaly free; and finally be family universal. ... of a new symmetry between bosons and fermions, dubbed supersymmetry.

395

Fermionic current induced by magnetic flux in compactified cosmic string spacetime  

E-Print Network (OSTI)

In this paper, we investigate the fermionic current densities induced by a magnetic flux running along the idealized cosmic string in a four-dimensional spacetime, admitting that the coordinate along the string's axis is compactified. In order to develop this investigation we construct the complete set of fermionic mode functions obeying a general quasiperiodicity condition along the compactified dimension. The vacuum expectation value of the azimuthal current density is decomposed into two parts. The first one corresponds to the uncompactified cosmic string geometry and the second one is the correction induced by the compactification. For the first part we provide a closed expression which includes various special cases previously discussed in the literature. The second part is an odd periodic function of the magnetic flux along the string axis with the period equal to the flux quantum and it is an even function of the magnetic flux enclosed by the string axis. The compactification of the cosmic string axis in combination with the quasiperiodicity condition leads to the nonzero axial current density. The latter is an even periodic function of the magnetic flux along the string axis and an odd periodic function of the magnetic flux enclosed by the string axis. The axial current density vanishes for untwisted and twisted fields in the absence of the magnetic flux enclosed by the string axis. The asymptotic behavior of the vacuum fermionic current is investigated near the string and at large distances from it. In particular, the topological part of the azimuthal current and the axial current are finite on the string's axis.

E. R. Bezerra de Mello; A. A. Saharian

2013-05-29T23:59:59.000Z

396

Light Organizing/Organizing Light [Light in Place  

E-Print Network (OSTI)

a street through alter­ nating areas of dark and light, welandscapes, streets and squares. Light summons our spiritfor changing light, both outside rooms (such as streets and

Schwartz, Martin

1992-01-01T23:59:59.000Z

397

Rotating black strings in $f(R)$-Maxwell theory  

E-Print Network (OSTI)

In general, the field equations of $f(R)$ theory coupled to a matter field are very complicated and hence it is not easy to find exact analytical solutions. However, if one considers traceless energy-momentum tensor for the matter source as well as constant scalar curvature, one can derive some exact analytical solutions from $f(R)$ theory coupled to a matter field. In this paper, by assuming constant curvature scalar, we construct a class of charged rotating black string solutions in $f(R)$-Maxwell theory. We study the physical properties and obtain the conserved quantities of the solutions. The conserved and thermodynamic quantities computed here depend on function $f'(R_{0})$ and differ completely from those of Einstein theory in AdS spaces. Besides, unlike Einstein gravity, the entropy does not obey the area law. We also investigate the validity of the first law of thermodynamics as well as the stability analysis in the canonical ensemble, and show that the black string solutions are always thermodynamically stable in $f(R)$-Maxwell theory with constant curvature scalar. Finally, we extend the study to the case where the Ricci scalar is not a constant and in particular $R=R(r)$. In this case, by using the Lagrangian multipliers method, we derive an analytical black string solution from $f(R)$ gravity and reconstructed the function $R(r)$. We find that this class of solutions has an additional logaritmic term in the metric function which incorporates the effect of the $f(R)$ theory in the solutions.

S. Salarpour; A. Sheykhi; Y. Bahrampour

2013-04-10T23:59:59.000Z

398

System and method for damping vibration in a drill string  

DOE Patents (OSTI)

A system for damping vibration in a drill string can include a valve assembly having a supply of a fluid, a first member, and a second member capable of moving in relation to first member in response to vibration of the drill bit. The first and second members define a first and a second chamber for holding the fluid. Fluid can flow between the first and second chambers in response to the movement of the second member in relation to the first member. The valve assembly can also include a coil or a valve for varying a resistance of the fluid to flow between the first and second chambers.

Wassell, Mark Ellsworth (Kingwood, TX); Turner, William Evans (Durham, CT); Burgess, Daniel E. (Middletown, CT); Perry, Carl Allison (Middletown, CT)

2011-08-16T23:59:59.000Z

399

System and method for damping vibration in a drill string  

DOE Patents (OSTI)

A system for damping vibration in a drill string can include a valve assembly having a supply of a fluid, a first member, and a second member capable of moving in relation to first member in response to vibration of the drill bit. The first and second members define a first and a second chamber for holding the fluid. Fluid can flow between the first and second chambers in response to the movement of the second member in relation to the first member. The valve assembly can also include a coil or a valve for varying a resistance of the fluid to flow between the first and second chambers.

Wassell, Mark Ellsworth (Kingwood, TX); Turner, William Evans (Durham, CT); Burgess, Daniel E. (Middletown, CT); Perry, Carl Allison (Middletown, CT)

2008-05-27T23:59:59.000Z

400

The symplectic Verlinde algebras and string K-theory.  

E-Print Network (OSTI)

We construct string topology operations in twisted K-theory. We study the examples given by symplectic Grassmannians, computing the twisted K-theory of the loop spaces of quaternionic projective spaces in detail. Via the work of Freed-Hopkins-Teleman, these computations are related to completions of the Verlinde algebras of Sp(n). We compute these completions, and other relevant information about the Verlinde algebras. We also identify the completions with the twisted K-theory of the Gruher-Salvatore pro-spectra. Further comments on the field theoretic nature of these constructions are made.

Igor Kriz; Craig Westerland; Joshua T. Levin

Note: This page contains sample records for the topic "holiday light strings" 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

System and method for damping vibration in a drill string  

DOE Patents (OSTI)

A system for damping vibration in a drill string can include a valve assembly having a supply of a fluid, a first member, and a second member capable of moving in relation to first member in response to vibration of the drill bit. The first and second members define a first and a second chamber for holding the fluid. Fluid can flow between the first and second chambers in response to the movement of the second member in relation to the first member. The valve assembly can also include a coil or a valve for varying a resistance of the fluid to flow between the first and second chambers.

Wassell, Mark Ellsworth (Kingwood, TX); Turner, William Evans (Durham, CT); Burgess, Daniel E. (Middletown, CT); Perry, Carl Allison (Middletown, CT)

2007-05-22T23:59:59.000Z

402

GEOGYN - a geological formation/drill string dynamics computer program  

DOE Green Energy (OSTI)

This paper describes the initial development phase of a finite element computer program, GEODYN, capable of simulating the three-dimensional transient, dynamic response of a polycrystalline diamond compact (PDC) bit interacting with a non-uniform formation. The ability of GEODYN to simulate response variations attributable to hole size, hole bottom surface shapes, and formation material non-uniformities is demonstrated. Planned developmental phases will address the detailed response of a bottom-hole assembly (BHA), a drill ahead (rock penetration and removal) simulation, and ultimately, the response of the entire string.

Caskey, B.

1984-09-16T23:59:59.000Z

403

System and method for damping vibration in a drill string  

Science Conference Proceedings (OSTI)

A system for damping vibration in a drill string can include a valve assembly having a supply of a fluid, a first member, and a second member capable of moving in relation to first member in response to vibration of the drill bit. The first and second members define a first and a second chamber for holding the fluid. Fluid can flow between the first and second chambers in response to the movement of the second member in relation to the first member. The valve assembly can also include a coil or a valve for varying a resistance of the fluid to flow between the first and second chambers.

Wassell, Mark Ellsworth (Kingswood, TX); Turner, William Evans (Durham, CT); Burgess, Daniel E. (Middletown, CT); Perry, Carl Allison (Middletown, CT)

2012-08-14T23:59:59.000Z

404

Black Holes in Higher Dimensions (Black Strings and Black Rings)  

E-Print Network (OSTI)

The main focus of this session was the presentation of new higher-dimensional black hole solutions, including black rings, black strings, and multi black holes, and the study of their properties. Besides new asymptotically flat and locally asymptotically flat black objects also new black holes with anti-de Sitter asymptotics were reported. The studies of their properties included the investigation of their stability, their thermodynamics, their analyticity and their existence. Furthermore, the geodesics in such higher-dimensional space-times were investigated.

Kunz, Jutta

2013-01-01T23:59:59.000Z

405

Qubit-string-based bit commitment protocols with physical security  

E-Print Network (OSTI)

Several kinds of qubit-string-based(QS-based) bit commitment protocols are presented, and a definition of information-theoretic concealing is given. All the protocols presented here are proved to be secure under this definition. We suggest an attack algorithm to obtain the local unitary transformation introduced in no-go theorem, which is used to attack the binding condition, then study the security of our QS-based bit commitment protocols under this attack via introducing a new concept "physical security of protocol". At last we present a practical QS-based bit commitment scheme against channel loss and error.

Li Yang; Chong Xiang; Bao Li

2010-11-23T23:59:59.000Z

406

Thermal String Vacuum in Black-Hole AdS Spacetime  

E-Print Network (OSTI)

In this letter we propose a new ansatz for the thermal string in the TFD formulation. From it, we derive the thermal vacuum for the closed bosonic string and calculate the thermal partition function in the blackhole $AdS$ background in the first order of the perturbative quantization.

E. L. Graca; I. V. Vancea

2005-05-23T23:59:59.000Z

407

Solid-State Lighting: LED Lighting Facts  

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

Market-Based Programs Printable Version Share this resource Send a link to Solid-State Lighting: LED Lighting Facts to someone by E-mail Share Solid-State Lighting: LED Lighting Facts on Facebook Tweet about Solid-State Lighting: LED Lighting Facts on Twitter Bookmark Solid-State Lighting: LED Lighting Facts on Google Bookmark Solid-State Lighting: LED Lighting Facts on Delicious Rank Solid-State Lighting: LED Lighting Facts on Digg Find More places to share Solid-State Lighting: LED Lighting Facts on AddThis.com... LED Lighting Facts CALiPER Program Standards Development Technical Information Network Gateway Demonstrations Municipal Consortium Design Competitions LED Lighting Facts LED lighting facts - A Program of the U.S. DOE DOE's LED Lighting Facts® program showcases LED products for general

408

Integrable Scalar Cosmologies I. Foundations and links with String Theory  

E-Print Network (OSTI)

We build a number of integrable one--scalar spatially flat cosmologies, which play a natural role in inflationary scenarios, examine their behavior in several cases and draw from them some general lessons on this type of systems, whose potentials involve combinations of exponential functions, and on similar non--integrable ones. These include the need for the scalar to emerge from the initial singularity while climbing up sufficiently steep exponential potentials ("climbing phenomenon") and the inevitable collapse in a big Crunch whenever the scalar tries to settle at negative extrema of the potential. We also elaborate on the links between these types of potentials and "brane supersymmetry breaking", a mechanism that ties together string scale and scale of supersymmetry breaking in a class of orientifold models. We show that, under some assumptions that are spelled out in the text, the extended objects of these vacua can inject inflationary phases with discrete values of the spectral index that are determined by the number of unwrapped dimensions of the branes and by the inverse power with which the string coupling $g_s$ enters their world--volume actions. An NS fivebrane, which is interestingly unstable in this class of models, when wrapped on a small internal cycle would yield a spectral index that is amusingly close to the experimentally favored PLANCK value ns ~ 0.96.

P. Fré; A. Sagnotti; A. S. Sorin

2013-07-07T23:59:59.000Z

409

Minimal Liouville Gravity correlation numbers from Douglas string equation  

E-Print Network (OSTI)

We continue the study of $(q,p)$ Minimal Liouville Gravity with the help of Douglas string equation. We generalize the results of \\cite{Moore:1991ir}, \\cite{Belavin:2008kv}, where Lee-Yang series $(2,2s+1)$ was studied, to $(3,3s+p_0)$ Minimal Liouville Gravity, where $p_0=1,2$. We demonstrate that there exist such coordinates $\\tau_{m,n}$ on the space of the perturbed Minimal Liouville Gravity theories, in which the partition function of the theory is determined by the Douglas string equation. The coordinates $\\tau_{m,n}$ are related in a non-linear fashion to the natural coupling constants $\\lambda_{m,n}$ of the perturbations of Minimal Lioville Gravity by the physical operators $O_{m,n}$. We find this relation from the requirement that the correlation numbers in Minimal Liouville Gravity must satisfy the conformal and fusion selection rules. After fixing this relation we compute three- and four-point correlation numbers when they are not zero. The results are in agreement with the direct calculations in Minimal Liouville Gravity available in the literature \\cite{Goulian:1990qr}, \\cite{Zamolodchikov:2005sj}, \\cite{Belavin:2006ex}.

Alexander Belavin; Boris Dubrovin; Baur Mukhametzhanov

2013-10-21T23:59:59.000Z

410

Through-tubing whipstock to exit two casing strings  

Science Conference Proceedings (OSTI)

A specific need was identified on the Montrose platform in Amoco`s North Sea drilling operations for milling through 7-in. and 9-5/8-in. casing at 60{degree} inclination using coiled tubing. All equipment would be required to pass through 3.75-in. restrictions in the 4{1/2}-in. tubing completion string. This operation would be a first for the industry through these two casing strings using through-tubing whipstock technology. A variable-angle test fixture was designed and constructed at Amoco`s Drilling Technology Test Facility at Catoosa, Oklahoma. Available through-tubing whipstock systems from three service companies were evaluated, including: (1) TIW/The Red Baron--whipstock OD (3.67 in.), mill OD (3.75 in.), system designation (T); (2) Weatherford Enterra, Inc.--(3.75 in.), (3.75 in.), (W); and Baker Oil Tools--(3.625 in.), (3.70 in.), (B). Results are discussed.

Townsend, S.; Onyia, E.; King, G. [Amoco EPTG, Tulsa, OK (United States)

1997-05-01T23:59:59.000Z

411

Question for SU(5) x SU(5) string unification  

E-Print Network (OSTI)

The heterotic string theory can embeds the crossed SU(5) x SU(5) gauge group. Here we investigate the string unification in this framework and the concerning problems. We show generically that only a very constrained parameter space is allowed for new particles, mostly due to the gauge coupling constant $\\alpha_1^{-1}$. One possible but unfavorable solution is given by the introduction of three fermion generations of SU(5)_L-adjoint representation. Only the low-scale decompositions of SU(5)_L with vanishing hypercharge, $\\Sigma_3\\sim(1,3)_0$ and $\\Sigma_8\\sim(8,1)_0$, of fermionic and bosonic types can be included to circumvent the problem. The triplets must live in TeV region and could be accessible at colliders. We also show that non-supersymmetric scenario is exclusively compatible with the introduction of additional color-SU(2)_L-triplet field while supersymmetry is solely possible at high-energy scale. All these intermediated thresholds are easily incorporated into the called Adjoint SU(5) schemes.

Edison T. Franco

2011-04-14T23:59:59.000Z

412

Question for SU(5) x SU(5) string unification  

E-Print Network (OSTI)

The heterotic string theory can embeds the crossed SU(5) x SU(5) gauge group. Here we investigate the string unification in this framework and the concerning problems. We show generically that only a very constrained parameter space is allowed for new particles, mostly due to the gauge coupling constant $\\alpha_1^{-1}$. One possible but unfavorable solution is given by the introduction of three fermion generations of SU(5)_L-adjoint representation. Only the low-scale decompositions of SU(5)_L with vanishing hypercharge, $\\Sigma_3\\sim(1,3)_0$ and $\\Sigma_8\\sim(8,1)_0$, of fermionic and bosonic types can be included to circumvent the problem. The triplets must live in TeV region and could be accessible at colliders. We also show that non-supersymmetric scenario is exclusively compatible with the introduction of additional color-SU(2)_L-triplet field while supersymmetry is solely possible at high-energy scale. All these intermediated thresholds are easily incorporated into the called Adjoint SU(5) schemes.

Franco, Edison T

2011-01-01T23:59:59.000Z

413

Towards a quantum field theory of primitive string fields  

Science Conference Proceedings (OSTI)

We denote generating functions of massless even higher-spin fields 'primitive string fields' (PSF's). In an introduction we present the necessary definitions and derive propagators and currents of these PDF's on flat space. Their off-shell cubic interaction can be derived after all off-shell cubic interactions of triplets of higher-spin fields have become known. Then we discuss four-point functions of any quartet of PSF's. In subsequent sections we exploit the fact that higher-spin field theories in AdS{sub d+1} are determined by AdS/CFT correspondence from universality classes of critical systems in d-dimensional flat spaces. The O(N) invariant sectors of the O(N) vector models for 1 {=} 4, they are distinguished by their anomalous dimensions (in CFT{sub 3}) or by theirmass (in AdS{sub 4}). We sum over these multiplets and the spins to obtain 'string type fields', one for each such monomial.

Ruehl, W., E-mail: wue_ruehl@t-online.de [Technical University of Kaiserslautern, Department of Physics (Germany)

2012-10-15T23:59:59.000Z

414

Stable Non-Supersymmetric Throats in String Theory  

SciTech Connect

We construct a large class of non-supersymmetric AdS-like throat geometries in string theory by taking non-supersymmetric orbifolds of supersymmetric backgrounds. The scale of SUSY breaking is the AdS radius, and the dual field theory has explicitly broken supersymmetry. The large hierarchy of energy scales in these geometries is stable. We establish this by showing that the dual gauge theories do not have any relevant operators which are singlets under the global symmetries. When the geometries are embedded in a compact internal space, a large enough discrete subgroup of the global symmetries can still survive to prevent any singlet relevant operators from arising. We illustrate this by embedding one case in a non-supersymmetric orbifold of a Calabi-Yau manifold. These examples can serve as a starting point for obtaining Randall-Sundrum models in string theory, and more generally for constructing composite Higgs or technicolor-like models where strongly coupled dynamics leads to the breaking of electro-weak symmetry. Towards the end of the paper, we briefly discuss how bulk gauge fields can be incorporated by introducing D7-branes in the bulk, and also show how the strongly coupled dynamics can lead to an emergent weakly coupled gauge theory in the IR with matter fields including scalars.

Kachru, Shamit; Simic, Dusan; /Stanford U., ITP /SLAC /Santa Barbara, KITP; Trivedi, Sandip P.; /Tata Inst. /Stanford U., ITP /SLAC

2011-06-28T23:59:59.000Z

415

Gauge/String-Gravity Duality and Froissart Bound  

E-Print Network (OSTI)

The gauge/string-gravity duality correspondence opened renewed hope and possibility to address some of the fundamental and non-perturbative QCD problems in particle physics, such as hadron spectrum and Regge behavior of the scattering amplitude at high energies. One of the most fundamental and long-standing problem is the high energy behavior of total cross-sections. According to a series of exhaustive tests by the COMPETE group, (1). total cross-sections have a universal Heisenberg behavior in energy corresponding to the maximal energy behavior allowed by the Froissart bound, i.e., $A + B ln^2 (s/s_0)$ with $B \\sim 0.32 mb$ and $s_0 \\sim 34.41 GeV^2$ for all reactions, and (2). the factorization relation among $\\sigma_{pp, even}, \\sigma_{\\gamma p}, and \\sigma_{\\gamma \\gamma}$ is well satisfied by experiments. I discuss the recent interesting application of the gauge/string-gravity duality of $AdS/CFT$ correspondence with a deformed background metric so as to break the conformal symmetry that can lead to the Heisenberg behavior of rising total cross-sections, and present some preliminary results on the high energy QCD from Planckian scattering in $AdS$ and black-hole production.

Kyungsik Kang

2004-10-16T23:59:59.000Z

416

A Compact Torus Fusion Reactor Utilizing a Continuously Generated Strings of CT's. The CT String Reactor, CTSR.  

Science Conference Proceedings (OSTI)

A fusion reactor is described in which a moving string of mutually repelling compact toruses (alternating helicity, unidirectional Btheta) is generated by repetitive injection using a magnetized coaxial gun driven by continuous gun current with alternating poloidal field. An injected CT relaxes to a minimum magnetic energy equilibrium, moves into a compression cone, and enters a conducting cylinder where the plasma is heated to fusion-producing temperature. The CT then passes into a blanketed region where fusion energy is produced and, on emergence from the fusion region, the CT undergoes controlled expansion in an exit cone where an alternating poloidal field opens the flux surfaces to directly recover the CT magnetic energy as current which is returned to the formation gun. The CT String Reactor (CTSTR) reactor satisfies all the necessary MHD stability requirements and is based on extrapolation of experimentally achieved formation, stability, and plasma confinement. It is supported by extensive 2D, MHD calculations. CTSTR employs minimal external fields supplied by normal conductors, and can produce high fusion power density with uniform wall loading. The geometric simplicity of CTSTR acts to minimize initial and maintenance costs, including periodic replacement of the reactor first wall.

Hartman, C W; Reisman, D B; McLean, H S; Thomas, J

2007-05-30T23:59:59.000Z

417

QCD string tension curve, the ferromagnetic magnetization, and the quark-antiquark confining potential at finite temperature  

Science Conference Proceedings (OSTI)

We study the string tension as a function of temperature, fitting the SU(3) lattice QCD finite temperature free energy potentials computed by the Bielefeld group. We compare the string tension points with order parameter curves of ferromagnets, superconductors, or string models, all related to confinement. We also compare the SU(3) string tension with the one of SU(2) lattice QCD. With the curve providing the best fit to the finite temperature string tensions, the spontaneous magnetization curve, we then show how to include finite temperature, in the state of the art confining and chiral invariant quark models.

Bicudo, P. [CFTP, Departamento de Fisica, Instituto Superior Tecnico, Av. Rovisco Pais, 1049-001 Lisboa (Portugal)

2010-08-01T23:59:59.000Z

418

The QCD string tension curve, the ferromagnetic magnetization, and the quark-antiquark confining potential at finite Temperature  

E-Print Network (OSTI)

We study the string tension as a function of temperature, fitting the SU(3) lattice QCD finite temperature free energy potentials computed by the Bielefeld group. We compare the string tension points with order parameter curves of ferromagnets, superconductors or string models, all related to confinement. We also compare the SU(3) string tension with the one of SU(2) Lattice QCD. With the curve providing the best fit to the finite temperature string tensions, the spontaneous magnetization curve, we then show how to include finite temperature, in the state of the art confining and chiral invariant quark models.

P. Bicudo

2010-03-04T23:59:59.000Z

419

Light Computing  

E-Print Network (OSTI)

A configuration of light pulses is generated, together with emitters and receptors, that allows computing. The computing is extraordinarily high in number of flops per second, exceeding the capability of a quantum computer for a given size and coherence region. The emitters and receptors are based on the quantum diode, which can emit and detect individual photons with high accuracy.

Gordon Chalmers

2006-10-13T23:59:59.000Z

420

EK101 Engineering Light Smart Lighting  

E-Print Network (OSTI)

extensively in concert lighting and are finding increased usage in dance lighting because refers to the upstage back curtain (is white or a light color), which can be us for lighting or special Mixer #12;Monitor House speaker Lighting System Control Board: Similar to the sound board, the light

Bifano, Thomas

Note: This page contains sample records for the topic "holiday light strings" 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

Property:Building/SPElectrtyUsePercLighting | Open Energy Information  

Open Energy Info (EERE)

SPElectrtyUsePercLighting SPElectrtyUsePercLighting Jump to: navigation, search This is a property of type String. Lighting Pages using the property "Building/SPElectrtyUsePercLighting" Showing 25 pages using this property. (previous 25) (next 25) S Sweden Building 05K0001 + 19.0328399893 + Sweden Building 05K0002 + 46.2232615553 + Sweden Building 05K0003 + 34.7717923865 + Sweden Building 05K0004 + 22.0431358106 + Sweden Building 05K0005 + 31.1832874134 + Sweden Building 05K0006 + 18.0356496585 + Sweden Building 05K0007 + 24.5339800461 + Sweden Building 05K0008 + 37.7154176036 + Sweden Building 05K0009 + 34.3932478145 + Sweden Building 05K0010 + 24.6640988083 + Sweden Building 05K0011 + 47.0283985768 + Sweden Building 05K0012 + 34.1786814575 + Sweden Building 05K0013 + 31.4027334982 +

422

Cosmological and astrophysical constraints on superconducting cosmic strings  

E-Print Network (OSTI)

We investigate the cosmological and astrophysical constraints on superconducting cosmic strings (SCSs). SCS loops emit strong bursts of electromagnetic waves, which might affect various cosmological and astrophysical observations. We take into account the effect on the CMB anisotropy, CMB blackbody spectrum, BBN, observational implications on radio wave burst and X-ray or gamma-ray events, and stochastic gravitational wave background measured by pulsar timing experiments. We then derive constraints on the parameters of SCS from current observations and estimate prospects for detecting SCS signatures in on-going observations. As a result, we find that these constraints exclude broad parameter regions, and also that on-going radio wave observations can probe large parameter space.

Koichi Miyamoto; Kazunori Nakayama

2012-12-30T23:59:59.000Z

423

Strange matter in the string-flip model  

E-Print Network (OSTI)

We employ variational Monte Carlo methods to study the transition to strange matter in a simple one-dimensional string-flip model with two flavors and two colors of quarks. The dynamics of the system are described in terms of a many-body potential that confines quarks within hadrons, yet enables the hadrons to separate without generating unphysical long-range van der Waals forces. The model has ``natural'' low- and high-density limits: it behaves as a system of isolated hadrons at low density and as a Fermi gas of quarks at high density. We show that the system exhibits a transition to strange matter characterized by an increase in the length-scale for confinement. Yet the small increase at the transition region --- of only ten percent --- suggests that clustering correlations remain strong well into the strange-matter domain. Our results put into question descriptions of strange matter in terms of noninteracting, or weakly interacting, quarks.

Danielle Morel; J. Piekarewicz

1999-07-29T23:59:59.000Z

424

D-brane Instantons in Type II String Theory  

Science Conference Proceedings (OSTI)

We review recent progress in determining the effects of D-brane instantons in N=1 supersymmetric compactifications of Type II string theory to four dimensions. We describe the abstract D-brane instanton calculus for holomorphic couplings such as the superpotential, the gauge kinetic function and higher fermionic F-terms. This includes a discussion of multi-instanton effects and the implications of background fluxes for the instanton sector. Our presentation also highlights, but is not restricted to the computation of D-brane instanton effects in quiver gauge theories on D-branes at singularities. We then summarize the concrete consequences of stringy D-brane instantons for the construction of semi-realistic models of particle physics or SUSY-breaking in compact and non-compact geometries.

Blumenhagen, Ralph; /Munich, Max Planck Inst.; Cvetic, Mirjam; /Pennsylvania U.; Kachru, Shamit; /Stanford U., Phys. Dept. /SLAC; Weigand, Timo; /SLAC

2009-06-19T23:59:59.000Z

425

Z2 electric strings and center vortices in SU(2) lattice gauge theory  

E-Print Network (OSTI)

We study the representations of SU(2) lattice gauge theory in terms of sums over the worldsheets of center vortices and Z2 electric strings, i.e. surfaces which open on the Wilson loop. It is shown that in contrast to center vortices the density of electric Z2 strings diverges in the continuum limit of the theory independently of the gauge fixing, however, their contribution to the Wilson loop yields physical string tension due to non-positivity of their statistical weight in the path integral, which is in turn related to the presence of Z2 topological monopoles in the theory.

M. I. Polikarpov; P. V. Buividovich

2008-01-01T23:59:59.000Z

426

Infinity Cancellation, Type I ? Compactification and String S-Matrix Functional 1  

E-Print Network (OSTI)

Nonvanishing tadpoles and possible infinities associated in the multiparticle amplitudes are discussed with regard to the disk and RP 2 diagrams of the Type I ? compactification. We find that the infinity cancellation of SO(32) type I theory extends to this case as well despite the presence of tadpoles localized in the D-brane worldvolume and the orientifold surfaces. Formalism of string S-matrix generating functional is presented to find a consistent string background as c-number source function: we find this only treats the cancellation of the tadpoles in the linearized approximation. Our formalism automatically provides representation of the string amplitudes on this background to all orders in ? ?. 1

Y. Arakane; H. Itoyama; H. Kunitomo; A. Tokura

1996-01-01T23:59:59.000Z

427

Sustainability of multi-field inflation and bound on string scale  

E-Print Network (OSTI)

We study the effects of the interaction terms between the inflaton fields on the inflationary dynamics in multi-field models. With power law type potential and interactions, the total number of e-folds may get considerably reduced and can lead to unacceptably short period of inflation. Also we point out that this can place a bound on the characteristic scale of the underlying theory such as string theory. Using a simple multi-field chaotic inflation model from string theory, the string scale is constrained to be larger than the scale of grand unified theory.

Jinn-Ouk Gong

2007-08-15T23:59:59.000Z

428

Curved Spacetime Geometry for Strings and Affine Non-compact Algebras  

E-Print Network (OSTI)

Based on lectures delivered at (1) the AMS meeting at USC, Nov. 1992 (2) Conference on Quantum Aspects of Black Holes, ITP, UC- Santa %Barbara, %%June 1993. (3) 25th Summer Institute, Ecole Normale Superieure, % Paris, Aug. 1992. To appear in "Interface Between Mathematics and Physics", Ed. S.-T. Yau. 1--Itroduction to String Theory in Curved Spacetime 2--G/H Coset Conformal Field Theory and String Theory 3--Time, Space and Classification of Non-Compact Cosets 4--Heterotic Strings in Curved Spacetime as gauged WZW Models 5--The Spacetime Manifold and the Geometry 6--Examples in 2D, 3D and 4D

Bars, Itzhak

1993-01-01T23:59:59.000Z

429

Texas Electric Lighting Report  

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

electric lighting electric lighting The SNAP House's lighting design aims for elegant simplicity in concept, use, and maintenance. Throughout the house, soft, ambient light is juxtaposed with bright, direct task lighting. All ambient and most task lighting is integrated directly into the architectural design of the house. An accent light wall between the bedroom and bathroom provides a glowing light for nighttime navigation.

430

Light Emitting Diode (LED) Lighting and Systems  

Science Conference Proceedings (OSTI)

This EPRI Technical Update addresses the most promising and unique energy efficient light source light emitting diode (LED) lighting. Business and technical market factors (Chapter 2) explain the upcoming growth of the LED and LED lighting market. Future technical improvements to LEDs and systems are also emphasized. Discussion of the importance of utility involvement in helping their customers make the switch from traditional lighting to LED lighting is provided. LED lighting technologies are covered in...

2007-12-21T23:59:59.000Z

431

V-075: EMC AlphaStor Command Injection and Format String Flaws Let Remote  

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

5: EMC AlphaStor Command Injection and Format String Flaws Let 5: EMC AlphaStor Command Injection and Format String Flaws Let Remote Users Execute Arbitrary Code V-075: EMC AlphaStor Command Injection and Format String Flaws Let Remote Users Execute Arbitrary Code January 23, 2013 - 12:26am Addthis PROBLEM: EMC AlphaStor Command Injection and Format String Flaws Let Remote Users Execute Arbitrary Code PLATFORM: EMC AlphaStor 4.0 prior to build 800 (All platforms) ABSTRACT: Two vulnerabilities were reported in EMC AlphaStor. REFERENCE LINKS: ESA-2013-008: SecurityTracker Alert ID: 1028020 Secunia Advisory SA51930 CVE-2013-0928 CVE-2013-0929 IMPACT ASSESSMENT: Medium DISCUSSION: A remote user can send a specially crafted DCP run command to inject commands and cause the Device Manager (rrobotd.exe) to execute arbitrary code on the target system [CVE-2013-0928].

432

First LIGO search for gravitational wave bursts from cosmic (super)strings  

Science Conference Proceedings (OSTI)

We report on a matched-filter search for gravitational wave bursts from cosmic string cusps using LIGO data from the fourth science run (S4) which took place in February and March 2005. No gravitational waves were detected in 14.9 days of data from times when all three LIGO detectors were operating. We interpret the result in terms of a frequentist upper limit on the rate of gravitational wave bursts and use the limits on the rate to constrain the parameter space (string tension, reconnection probability, and loop sizes) of cosmic string models. Many grand unified theory-scale models (with string tension G{mu}/c{sup 2}{approx_equal}10{sup -6}) can be ruled out at 90% confidence for reconnection probabilities p{<=}10{sup -3} if loop sizes are set by gravitational back reaction.

Abbott, B. P.; Abbott, R.; Adhikari, R.; Anderson, S. B.; Araya, M.; Armandula, H.; Aso, Y.; Ballmer, S.; Barton, M. A.; Betzwieser, J.; Billingsley, G.; Black, E.; Blackburn, J. K.; Bork, R.; Boschi, V.; Brooks, A. F.; Cannon, K. C.; Cardenas, L.; Cepeda, C.; Chalermsongsak, T. [LIGO-California Institute of Technology, Pasadena, California 91125 (United States)] (and others)

2009-09-15T23:59:59.000Z

433

Self-force on an electric dipole in the spacetime of a cosmic string  

E-Print Network (OSTI)

We calculate the electrostatic self-force on an electric dipole in the spacetime generated by a static, thin, infinite and straight cosmic string. The electric dipole is held fixed in different configurations, namely, parallel, perpendicular to the cosmic string and oriented along the azimuthal direction around this topological defect, which is stretched along the z axis. We show that the self-force is equivalent to an interaction of the electric dipole with an effective dipole moment which depends on the linear mass density of the cosmic string and on the configuration. The plots of the self-forces as functions of the parameter which determines the angular deficit of the cosmic string are shown for those different configurations.

C. R. Muniz; V. B Bezerra

2013-10-16T23:59:59.000Z

434

U-092: Sudo Format String Bug Lets Local Users Gain Elevated Privileges |  

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

2: Sudo Format String Bug Lets Local Users Gain Elevated 2: Sudo Format String Bug Lets Local Users Gain Elevated Privileges U-092: Sudo Format String Bug Lets Local Users Gain Elevated Privileges January 31, 2012 - 5:45am Addthis PROBLEM: A vulnerability was reported in Sudo. A local user can obtain elevated privileges on the target system. PLATFORM: Linux (Any) Version(s): 1.8.0 - 1.8.3p1 ABSTRACT: A local user can supply a specially crafted command line argument to trigger a format string flaw and execute arbitrary commands on the target system with root privileges. reference LINKS: CVE-2012-0809 SecurityTracker Alert ID: 1026600 Vendor Site IMPACT ASSESSMENT: Medium Discussion: The vulnerability resides in the sudo_debug() function in 'src/sudo.c'. This can be exploited by local users, regardless of whether they are listed

435

V-075: EMC AlphaStor Command Injection and Format String Flaws Let Remote  

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

5: EMC AlphaStor Command Injection and Format String Flaws Let 5: EMC AlphaStor Command Injection and Format String Flaws Let Remote Users Execute Arbitrary Code V-075: EMC AlphaStor Command Injection and Format String Flaws Let Remote Users Execute Arbitrary Code January 23, 2013 - 12:26am Addthis PROBLEM: EMC AlphaStor Command Injection and Format String Flaws Let Remote Users Execute Arbitrary Code PLATFORM: EMC AlphaStor 4.0 prior to build 800 (All platforms) ABSTRACT: Two vulnerabilities were reported in EMC AlphaStor. REFERENCE LINKS: ESA-2013-008: SecurityTracker Alert ID: 1028020 Secunia Advisory SA51930 CVE-2013-0928 CVE-2013-0929 IMPACT ASSESSMENT: Medium DISCUSSION: A remote user can send a specially crafted DCP run command to inject commands and cause the Device Manager (rrobotd.exe) to execute arbitrary code on the target system [CVE-2013-0928].

436

Constraints on the Fundamental String Coupling from B-Mode Experiments  

Science Conference Proceedings (OSTI)

We study signatures of cosmic superstring networks containing strings of multiple tensions and Y junctions, on the cosmic microwave background (CMB) temperature and polarization spectra. Focusing on the crucial role of the string coupling constant g{sub s}, we show that the number density and energy density of the scaling network are dominated by different types of string in the g{sub s}{approx}1 and g{sub s}string tension {mu}{sub F} from upcoming and future CMB polarization experiments, as well as the signal to noise in detecting the difference between B-mode signals in the limiting cases of large and small g{sub s}. We show that such a detectable shift is within reach of planned experiments.

Avgoustidis, A. [Centre for Theoretical Cosmology, DAMTP, CMS, Wilberforce Road, Cambridge CB3 0WA (United Kingdom); Copeland, E. J. [School of Physics and Astronomy, University of Nottingham, University Park, Nottingham NG7 2RD (United Kingdom); Moss, A. [Department of Physics and Astronomy, University of British Columbia, Vancouver, BC (Canada); Pogosian, L. [Department of Physics, Simon Fraser University, Burnaby, BC, V5A 1S6 (Canada); Pourtsidou, A. [Jodrell Bank Centre for Astrophysics, University of Manchester, Manchester M13 9PL (United Kingdom); Steer, Daniele A. [APC, UMR 7164, 10 rue Alice Domon et Leonie Duquet, 75205 Paris Cedex 13 (France)

2011-09-16T23:59:59.000Z

437

A String Function for Describing the Propagation of Baroclinic Anomalies in the Ocean  

Science Conference Proceedings (OSTI)

The authors derive a string function that describes the propagation of large-scale, potentially large amplitude, baroclinic energy anomalies in a two-layer ocean with variable topography and rotation parameter. The generality of the two-layer ...

Robert H. Tyler; Rolf Käse

2001-03-01T23:59:59.000Z

438

First LIGO search for gravitational wave bursts from cosmic (super)strings  

E-Print Network (OSTI)

We report on a matched-filter search for gravitational wave bursts from cosmic string cusps using LIGO data from the fourth science run (S4) which took place in February and March 2005. No gravitational waves were detected ...

Zucker, Michael E.

439

Topological terms and the global symplectic geometry of the phase space in string theory  

E-Print Network (OSTI)

Using an imbedding supported background tensor approach for the differential geometry of an imbedded surface in an arbitrary background, we show that the topological terms associated with the inner and outer curvature scalars of the string worldsheet, have a dramatic effect on the global symplectic geometry of the phase space of the theory. By identifying the global symplectic potential of each Lagrangian term in the string action as the argument of the corresponding pure divergence term in a variational principle, we show that those topological terms contribute explicitly to the symplectic potential of any action describing strings, without modifying the string dynamics and the phase space itself. The variation (the exterior derivative on the phase space) of the symplectic potential generates the integral kernel of a covariant and gauge invariant symplectic structure for the theory, changing thus the global symplectic geometry of the phase space. Similar results for non-Abelian gauge theories and General Relativity are briefly discussed

R. Cartas-Fuentevilla

2004-04-01T23:59:59.000Z

440

Fast String Search on Multicore Processors: Mapping fundamental algorithms onto parallel hardware  

Science Conference Proceedings (OSTI)

String searching is one of these basic algorithms. It has a host of applications, including search engines, network intrusion detection, virus scanners, spam filters, and DNA analysis, among others. The Cell processor, with its multiple cores, promises to speed-up string searching a lot. In this article, we show how we mapped string searching efficiently on the Cell. We present two implementations: • The fast implementation supports a small dictionary size (approximately 100 patterns) and provides a throughput of 40 Gbps, which is 100 times faster than reference implementations on x86 architectures. • The heavy-duty implementation is slower (3.3-4.3 Gbps), but supports dictionaries with tens of thousands of strings.

Scarpazza, Daniele P.; Villa, Oreste; Petrini, Fabrizio

2008-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "holiday light strings" 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

The collision and snapping of cosmic strings generating spherical impulsive gravitational waves  

E-Print Network (OSTI)

The Penrose method for constructing spherical impulsive gravitational waves is investigated in detail, including alternative spatial sections and an arbitrary cosmological constant. The resulting waves include those that are generated by a snapping cosmic string. The method is used to construct an explicit exact solution of Einstein's equations describing the collision of two nonaligned cosmic strings in a Minkowski background which snap at their point of collision.

J. Podolsky; J. B. Griffiths

2000-01-17T23:59:59.000Z

442

From ten to four dimensions: a brief overview on string compactification  

Science Conference Proceedings (OSTI)

We provide a brief introduction on string compactifications for non-experts. The prediction of critical string theory to have a ten-dimensional space-time gives a rich background to answer fundamental questions in theoretical physics. From the Calabi-Yau compactification to recent flux compactification models, we discuss the attempts made to construct a consistent and realistic effective four-dimensional theory.

Loaiza-Brito, O.; Vazquez-Mercado, L. [Departamento de Fisica, Division de Ciencias e Ingenieria, Campus Leon, Universidad de Guanajuato, C.P. 37150, Guanuajuato (Mexico)

2010-10-11T23:59:59.000Z

443

On p-Adic Sector of Open Scalar Strings and Zeta Field Theory  

Science Conference Proceedings (OSTI)

We consider construction of Lagrangians which may be suitable for description of p-adic sector of an open scalar string. Such Lagrangians have their origin in Lagrangian for a single p-adic string and they contain the Riemann zeta function with the d'Alembertian in its argument. However, investigation of the field theory with Riemann zeta function is interesting in itself as well. We present a brief review and some new results.

Dragovich, Branko [Institute of Physics, Pregrevica 118, Zemun, P.O. Box 57, 11001 Belgrade (Serbia)

2010-06-17T23:59:59.000Z

444

Lectures on the gauge/string duality with emphasis on spectroscopy  

Science Conference Proceedings (OSTI)

I review recent progress on the connection between string theory and quantum chromo-dynamics in the context of the gauge/string duality. Emphasis is placed on conciseness and conceptual aspects rather than on technical details. Topics covered include the large-N{sub c} limit of gauge theories, the gravitational description of gauge theory thermodynamics and hydrodynamics, and the physics of quarks and mesons in the quark-gluon plasma.

Mateos, David [Institucio Catalana de Recerca i Estudis Avancats (ICREA), Barcelona (Spain) and Departament de Fisica Fonamental and Institut de Ciencies del Cosmos, Universitat de Barcelona, Diagonal 647, E-08028 Barcelona (Spain)

2010-11-12T23:59:59.000Z

445

Methods and systems for determining angular orientation of a drill string  

DOE Patents (OSTI)

Preferred methods and systems generate a control input based on a periodically-varying characteristic associated with the rotation of a drill string. The periodically varying characteristic can be correlated with the magnetic tool face and gravity tool face of a rotating component of the drill string, so that the control input can be used to initiate a response in the rotating component as a function of gravity tool face.

Cobern, Martin E. (Cheshire, CT)

2010-03-23T23:59:59.000Z

446

Forecast constraints on cosmic strings from future CMB, pulsar timing and gravitational wave direct detection experiments  

E-Print Network (OSTI)

We study future observational constraints on cosmic string parameters from various types of next-generation experiments: direct detection of gravitational waves (GWs), pulsar timing array, and the cosmic microwave background (CMB). We consider both GW burst and stochastic GW background searches by ground- and space-based interferometers as well as GW background detection in pulsar timing experiments. We also consider cosmic string contributions to the CMB temperature and polarization anisotropies. These different types of observations offer independent probes of cosmic strings and may enable us to investigate cosmic string properties if the signature is detected. In this paper, we evaluate the power of future experiments to constrain cosmic string parameters, such as the string tension Gmu, the initial loop size alpha, and the reconnection probability p, by performing Fisher information matrix calculations. We find that combining the information from the different types of observations breaks parameter degeneracies and provides more stringent constraints on the parameters. We also find future space-borne interferometers independently provide a highly precise determination of the parameters.

Sachiko Kuroyanagi; Koichi Miyamoto; Toyokazu Sekiguchi; Keitaro Takahashi; Joseph Silk

2012-10-10T23:59:59.000Z

447

Energy and lighting design  

SciTech Connect

A detailed examination of the current energy conservation practices for lighting systems is presented. This first part of a two-part presentation covers the following: energy and lighting design; lighting and energy standards; lighting efficiency factors; light control and photometrics; lighting and the architectural interior; luminaire impact on the environment; basic design techniques; the lighting power budget; and conservation through control.

Helms, R.N.

1979-11-01T23:59:59.000Z

448

Light Emitting Diodes and General Lighting  

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

Light Emitting Diodes and General Lighting Speaker(s): Martin Moeck Date: August 6, 2009 - 12:00pm Location: 90-3122 We give a short overview on high-power light emitting diodes,...

449

Evaluation of Lighting and Lighting Control Technologies  

Science Conference Proceedings (OSTI)

Energy efficient lighting and lighting controls have been a means to significant energy savings for many facilities around the world. Advances in lighting sources often allow for the conservation of quality of light while providing more flexibility in the control of light. Additionally, advances in core technologies within the lighting marketplace regularly lead to the introduction of new lamps, fixtures and controls.  With the rapid introduction of new products and designs, it is important to ...

2013-11-15T23:59:59.000Z

450

Lighting Group: Controls: PIER Lighting Projects  

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

PIER Lighting Projects CEC Public Interest Energy Research (PIER) Projects Objective Lighting controls are often expensive, complex, hard to commission properly and difficult to...

451

Architectural Lighting Analysis in Virtual Lighting Laboratory  

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

Architectural Lighting Analysis in Virtual Lighting Laboratory NOTICE Due to the current lapse of federal funding, Berkeley Lab websites are accessible, but may not be updated...

452

Property:Building/SPBreakdownOfElctrcityUseKwhM2Lighting | Open Energy  

Open Energy Info (EERE)

This is a property of type String. This is a property of type String. Lighting Pages using the property "Building/SPBreakdownOfElctrcityUseKwhM2Lighting" Showing 25 pages using this property. (previous 25) (next 25) S Sweden Building 05K0001 + 13.6004313481 + Sweden Building 05K0002 + 51.2740526316 + Sweden Building 05K0003 + 25.3519773429 + Sweden Building 05K0004 + 14.5539566929 + Sweden Building 05K0005 + 17.1088606195 + Sweden Building 05K0006 + 11.7758321884 + Sweden Building 05K0007 + 16.0796522459 + Sweden Building 05K0008 + 15.7053876478 + Sweden Building 05K0009 + 19.44639866 + Sweden Building 05K0010 + 37.0625 + Sweden Building 05K0011 + 12.9336787565 + Sweden Building 05K0012 + 12.985779547 + Sweden Building 05K0013 + 21.6361810339 + Sweden Building 05K0014 + 29.853732347 +

453

Nuclear Astrophysics of Worlds in the String Landscape  

E-Print Network (OSTI)

Motivated by landscape models in string theory, cosmic nuclear evolution is analyzed allowing the Standard Model Higgs expectation value w to take values different from that in our world (w=1), while holding the Yukawa couplings fixed. Thresholds are estimated, and astrophysical consequences are described, for several sensitive dependences of nuclear behavior on w. The dependence of the neutron-proton mass difference on w is estimated based on recent calculations of strong isospin symmetry breaking, and is used to derive the threshold of neutron-stable worlds, w ~ 0.6+/- 0.2. The effect of a stable neutron on nuclear evolution in the Big Bang and stars is shown to lead to radical differences from our world, such as a predominance of heavy r-process and s-process nuclei and a lack of normal galaxies, stars and planets. Rough estimates are reviewed of w thresholds for deuteron stability and the pp and pep reactions dominant in many stars. A simple model of nuclear resonances is used to estimate the w dependence of overall carbon and oxygen production during normal stellar nucleosynthesis; carbon production is estimated to change by a fraction ~15(1-w). Radical changes in astrophysical behavior seem to require changes in w of more than a few percent, even for the most sensitive phenomena.

Craig J. Hogan

2006-02-06T23:59:59.000Z

454

Phenomenology of heterotic and type II orientifold string models  

E-Print Network (OSTI)

Cryptons are metastable bound states of fractionally-charged particles that arise generically in the hidden sectors of models derived from heterotic string. We study their properties and decay modes in a speci?c ?ipped SU(5) model with long-lived four-particle spin-zero bound states called tetrons. The expected masses and lifetimes of the neutral tetrons make them good candidates for cold dark matter (CDM), and a potential source of the ultra-high energy cosmic rays (UHECRs) which have been observed, whereas the charged tetrons would have decayed in the early Universe. We calculate the spectra of ultra-high-energy cosmic rays (UHECRs) in an ex¬plicit top-down model based on the decays of metastable neutral ‘crypton’ states. For all the decay operators, the total UHECR spectra are compatible with the available data. Also, the fractions of photons are compatible with all the published upper limits, but may be detectable in future experiments. We also construct several intersecting D-brane models on a variety of orientifold backgrounds. In particular, we construct ?ipped SU(5), Pati-Salam, and MSSM-like models. The phenomenological properties of these models are studied. For one model in particular, we ?nd that we may explain the quark masses and mixings, the tau lepton mass, and generate small neutrino masses via the see-saw mechanism.

Mayes, Van Eric

2007-08-01T23:59:59.000Z

455

On The Independence Of Digits In Connected Digit Strings  

E-Print Network (OSTI)

One of the frequently used assumptions in Speaker Verification is that two speech segments (phonemes, subwords, words) are considered to be independent. And therefore, the log-likelihood of a test utterance is just the sum of the log-likelihoods of the speech segments in that utterance. This paper reports about cases in which this observation-independence assumption seems to be violated, namely for those test utterances which call a certain speech model more than once. For example, a pin code which contains a non-unique digit set performs worse in verification than a pin code which consists of four different digits. Results illustrate that violating the independence assumption too much might result in increasing EERs while more information (in form of digits) is added to the test utterance. 1. INTRODUCTION In Speaker Verification (SV) systems using passwords in the form of fixed or prompted digit strings it seems usual to compute the log-likelihood of a claimant being the true speaker...

Johan Koolwaaij; Lou Boves

1995-01-01T23:59:59.000Z

456

Signals of Inflation in a Friendly String Landscape  

E-Print Network (OSTI)

Following Freivogel {\\it et al} we consider inflation in a predictive (or `friendly') region of the landscape of string vacua, as modeled by Arkani-Hamed, Dimopoulos and Kachru. In such a region the dimensionful coefficients of super-renormalizable operators unprotected by symmetries, such as the vacuum energy and scalar mass-squareds are freely scanned over, and the objects of study are anthropically or `environmentally' conditioned probability distributions for observables. In this context we study the statistical predictions of (inverted) hybrid inflation models, where the properties of the inflaton are probabilistically distributed. We derive the resulting distributions of observables, including the deviation from flatness $|1-\\Omega|$, the spectral index of scalar cosmological perturbations $n_s$ (and its scale dependence $dn_s/d\\log k$), and the ratio of tensor to scalar perturbations $r$. The environmental bound on the curvature implies a solution to the $\\eta$-problem of inflation with the predicted distribution of $(1-n_s)$ indicating values close to current observations. We find a relatively low probability ($<3%$) of `just-so' inflation with measurable deviations from flatness. Intermediate scales of inflation are preferred in these models.

John March-Russell; Francesco Riva

2006-04-11T23:59:59.000Z

457

Light Sterile Neutrino from extra dimensions and Four-Neutrino Solutions to Neutrino Anomalies  

E-Print Network (OSTI)

We propose a four-neutrino model which can reconcile the existing data coming from underground experiments in terms of neutrino oscillations, together with the hint from the LSND experiment and a possible neutrino contribution to the hot dark matter of the Universe. It applies the idea that extra compact dimensions, probed only by gravity and possibly gauge-singlet fields, can lower the fundamental scales such as the Planck, string or unification scales. Our fourth light neutrino $\

A. Ioannisian; J. W. F. Valle

1999-11-14T23:59:59.000Z

458

Next Generation Light Source  

•Next Generation Light Source – Super Thin Light Bulb, Energy Efficient, Long Life, Dimmable, and Uniform Illumination •High Entry Barrier – 71 ...

459

Drosophila huntingtin-interacting protein 14 is a presynaptic protein required for photoreceptor synaptic transmission and expression of the palmitoylated proteins synaptosome-associated protein 25 and cysteine string protein  

E-Print Network (OSTI)

and early death in cysteine string protein mutants ofProtein 25 and Cysteine String Protein R. Steven Stowers andSNAP-25 and cysteine string protein. In non-neuronal cells

Stowers, R Steven; Isacoff, Ehud Y

2007-01-01T23:59:59.000Z

460

First Light  

E-Print Network (OSTI)

The first dwarf galaxies, which constitute the building blocks of the collapsed objects we find today in the Universe, had formed hundreds of millions of years after the big bang. This pedagogical review describes the early growth of their small-amplitude seed fluctuations from the epoch of inflation through dark matter decoupling and matter-radiation equality, to the final collapse and fragmentation of the dark matter on all mass scales above \\~10^{-4} solar masses. The condensation of baryons into halos in the mass range of ~10^5-10^{10} solar masses led to the formation of the first stars and the re-ionization of the cold hydrogen gas, left over from the big bang. The production of heavy elements by the first stars started the metal enrichment process that eventually led to the formation of rocky planets and life. A wide variety of instruments currently under design [including large-aperture infrared telescopes on the ground or in space (JWST), and low-frequency arrays for the detection of redshifted 21cm radiation], will establish better understanding of the first sources of light during an epoch in cosmic history that was largely unexplored so far. Numerical simulations of reionization are computationally challenging, as they require radiative transfer across large cosmological volumes as well as sufficently high resolution to identify the sources of the ionizing radiation. The technological challenges for observations and the computational challenges for numerical simulations, will motivate intense work in this field over the coming decade.

Abraham Loeb

2006-03-14T23:59:59.000Z

Note: This page contains sample records for the topic "holiday light strings" 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

Lighting | Department of Energy  

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

Lighting Lighting Lighting When you're shopping for lightbulbs, compare lumens and use the Lighting Facts label to be sure you're getting the amount of light, or level of brightness, you want. You can save money and energy while lighting your home and still maintaining good light quantity and quality. Consider energy-efficient lighting options to use the same amount of light for less money. Learn strategies for comparing and buying lighting products and using them efficiently. Featured Lighting Choices to Save You Money Light your home for less money while using the same amount of light. How Energy-Efficient Light Bulbs Compare with Traditional Incandescents Energy-efficient light bulbs are available today and could save you about $50 per year in energy costs when you replace 15 traditional incandescent bulbs in your home.

462

PROJECTED CONSTRAINTS ON THE COSMIC (SUPER)STRING TENSION WITH FUTURE GRAVITATIONAL WAVE DETECTION EXPERIMENTS  

SciTech Connect

We present projected constraints on the cosmic string tension, G{mu}/c {sup 2}, that could be achieved by future gravitational wave detection experiments and express our results as semi-analytic relations of the form G{mu}({Omega}{sub gw} h {sup 2})/c {sup 2}, to allow for direct computation of the tension constraints for future experiments. These results can be applied to new constraints on {Omega}{sub gw} h {sup 2} as they are imposed. Experiments operating in different frequency bands probe different parts of the gravitational wave spectrum of a cosmic string network and are sensitive to different uncertainties in the underlying cosmic string model parameters. We compute the gravitational wave spectra of cosmic string networks based on the one-scale model, covering all the parameter space accessed by each experiment that is strongly dependent on the birth scale of loops relative to the horizon, {alpha}. The upper limits on the string tension avoid any assumptions on the model parameters. We perform this investigation for Pulsar Timing Array experiments of different durations, as well as ground-based and space-borne interferometric detectors.

Sanidas, Sotirios A.; Battye, Richard A.; Stappers, Benjamin W., E-mail: sotiris.sanidas@gmail.com, E-mail: rbattye@jb.man.ac.uk, E-mail: ben.stappers@manchester.ac.uk [Jodrell Bank Centre for Astrophysics, University of Manchester, Manchester, M13 9PL (United Kingdom)

2013-02-10T23:59:59.000Z

463

Low-Energy Supersymmetry Breaking from String Flux Compactifications: Benchmark Scenarios  

E-Print Network (OSTI)

Soft supersymmetry breaking terms were recently derived for type IIB string flux compactifications with all moduli stabilised. Depending on the choice of the discrete input parameters of the compactification such as fluxes and ranks of hidden gauge groups, the string scale was found to have any value between the TeV and GUT scales. We study the phenomenological implications of these compactifications at low energy. Three realistic scenarios can be identified depending on whether the Standard Model lies on D3 or D7 branes and on the value of the string scale. For the MSSM on D7 branes and the string scale between 10^12 GeV and 10^17 GeV we find that the LSP is a neutralino, while for lower scales it is the stop. At the GUT scale the results of the fluxed MSSM are reproduced, but now with all moduli stabilised. For the MSSM on D3 branes we identify two realistic scenarios. The first one corresponds to an intermediate string scale version of split supersymmetry. The second is a stringy mSUGRA scenario. This requires tuning of the flux parameters to obtain the GUT scale. Phenomenological constraints from dark matter, (g-2)_mu and BR(b->s gamma) are considered for the three scenarios. We provide benchmark points with the MSSM spectrum, making the models suitable for a detailed phenomenological analysis.

Benjamin C. Allanach; Fernando Quevedo; Kerim Suruliz

2005-12-06T23:59:59.000Z

464

Optimal Solutions for the Closest-String Problem via Integer Programming  

E-Print Network (OSTI)

this paper we study the closest-string problem (CSP), which can be defined as follows: given a finite set of strings, each string with length m, find a center string t of length m minimizing d, such that for every string s d. By ) we mean the Hamming distance between t and s . This is an NP-hard problem, with applications in molecular biology and coding theory. Even though there are good approximation algorithms for this problem, and exact algorithms for instances with d constant, there are no studies trying to solve it exactly for the general case. In this paper we propose three integer-programming (IP) formulations and a heuristic, which is used to provide upper bounds on the value of an optimal solution. We report computational results of a branchand -bound algorithm based on one of the IP formulations, and of the heuristic, executed over randomly generated instances. These results show that it is possible to solve CSP instances of moderate size to optimality

Claudio N. Meneses; Zhaosong Lu; Carlos A. S. Oliveira; Panos M. Pardalos

2004-01-01T23:59:59.000Z

465

Casimir scaling and string breaking in G{sub 2} gluodynamics  

Science Conference Proceedings (OSTI)

We study the potential energy between static charges in G{sub 2} gluodynamics in three and four dimensions. Our work is based on an efficient local hybrid Monte Carlo algorithm and a multilevel Luescher-Weisz algorithm with exponential error reduction to accurately measure expectation values of Wilson and Polyakov loops. Both in three and four dimensions we show that at intermediate scales the string tensions for charges in various G{sub 2} representations scale with the second order Casimir. In three dimensions Casimir scaling is confirmed within 4% for charges in representations of dimensions 7, 14, 27, 64, 77, 77{sup '}, 182, and 189 and in four dimensions within 5% for charges in representations of dimensions 7, 14, 27, and 64. In three dimensions we detect string breaking for charges in the two fundamental representations. The scale for string breaking agrees very well with the mass of the created pair of glue lumps. Close to the string breaking distance Casimir scaling between adjoint and defining representation is violated by 2.5%. The analytical prediction for the continuum string tension is confirmed for the defining representation in three dimensions.

Wellegehausen, Bjoern H.; Wipf, Andreas; Wozar, Christian [Theoretisch-Physikalisches Institut, Friedrich-Schiller-Universitaet Jena, Max-Wien-Platz 1, 07743 Jena (Germany)

2011-01-01T23:59:59.000Z

466

Classical string solutions in AdS{sub 5}xS{sup 5}  

Science Conference Proceedings (OSTI)

We discuss some new simple closed bosonic string solutions in AdS{sub 5}xS{sup 5} that may be of interest in the context of AdS/CFT duality. In the first part of this work we consider solutions with two spins (S{sub 1},S{sub 2}) in AdS{sub 5}. Starting from the flat-space solutions and using perturbation theory in the curvature of AdS{sub 5} space, we construct leading terms in the small two-spin solution. We find corrections to the leading Regge term in the classical string energy and uncover a discontinuity in the spectrum for a certain type of solution. We then analyze the connection between small-spin and large-spin limits of string solutions in AdS{sub 5}. We show that the S{sub 1}=S{sub 2} solution in AdS{sub 5} found in earlier papers admits both limits only in the simplest cases of the folded and rigid circular strings. In the second part of the paper, we construct a new class of chiral solutions in R{sub t}xS{sup 5} for which embedding coordinates of S{sup 5} satisfy the linear Laplace equations. They generalize the previously studied rigid string solutions. We study in detail a simple nontrivial example.

Murchikova, E. M. [Blackett Laboratory, Imperial College, London SW7 2AZ (United Kingdom); SINP, Moscow State University, 119991, Moscow (Russian Federation)

2011-02-15T23:59:59.000Z

467

Superconducting Cosmic Strings that Connected a Charged Black Hole and Considered as Hair of Black Hole  

E-Print Network (OSTI)

This paper describes that the superconducting cosmic strings can be connected to an electrically charged black hole, and can be considerd as the hair of black hole. What the no-hair theorems show is that a large amount of information is lost when a body collapses to form a black hole. In addition, the no-hair theorem has not been proved for the Yang-Mills field. This paper proves and claims that the superconducting cosmic strings can be connected to an electrically charged hole when the current inside these strings and black holes approaches the critical value. Because, this state is the final state of the gravitational collapse, and the event horizon would be destroyed in this state. Therefore, these strings should be considered as hair of the charged black holes, and may be titled as BHCS (Black Hole Connected Strings). This means that at least the charged black holes have the hair. Thus, the no-hair theorem is not applicable for the charged black holes in the state of the critical current.

Ali Riza Akcay

1999-09-23T23:59:59.000Z

468

Architectural Lighting Analysis in Virtual Lighting Laboratory  

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

Architectural Lighting Analysis in Virtual Lighting Laboratory Architectural Lighting Analysis in Virtual Lighting Laboratory Speaker(s): Mehlika Inanici Date: July 7, 2003 - 12:00pm Location: Bldg. 90 Seminar Host/Point of Contact: Satkartar K. Kinney Virtual Lighting Laboratory is a Radiance-based lighting analysis tool and methodology that proposes transformations in the utilization of computer visualization in lighting analysis and design decision-making. It is a computer environment, where the user has been provided with matrices of illuminance and luminance values extracted from high dynamic range images. The principal idea is to provide the laboratory to the designer and researcher to explore various lighting analysis techniques instead of imposing limited number of predetermined metrics. In addition, it introduces an analysis approach for temporal and spatial lighting

469

New Light Sources for Tomorrow's Lighting Designs  

E-Print Network (OSTI)

The lighting industry is driven to provide light sources and lighting systems that, when properly applied, will produce a suitable luminous environment in which to perform a specified task. Tasks may include everything from office work, manufacturing and inspection to viewing priceless art objects, selecting the right chair for your living room, and deciding which produce item to select for tonight's dinner. While energy efficiency is a major consideration in any new lighting system design, the sacrifice of lighting quality may cost more in terms of lost productivity and user dissatisfaction than can ever be saved on that monthly energy bill. During the past several years, many new light sources have been developed and introduced. These product introductions have not been limited to anyone lamp type, but instead may be found in filament, fluorescent and high intensity discharge lamp families. Manufacturers of light sources have two basic goals for new product development. These goals are high efficiency lighting and improved color rendering properties. High efficiency lighting may take the form of either increasing lamp efficiency (lumens of light delivered per watt of power consumed) or decreasing lamp size, thus making a more easily controlled light source that places light where it is needed. The manufacturer's second goal is to produce lamps that render colors accurately while maintaining high efficiency. This paper will discuss new introductions in light sources and lighting systems and how they may impact the design of luminous environments of the future.

Krailo, D. A.

1986-06-01T23:59:59.000Z

470

On the Whitham hierarchy: dressing scheme, string equations and additional symmetrie  

E-Print Network (OSTI)

A new description of the universal Whitham hierarchy in terms of a factorization problem in the Lie group of canonical transformations is provided. This scheme allows us to give a natural description of dressing transformations, string equations and additional symmetries for the Whitham hierarchy. We show how to dress any given solution and prove that any solution of the hierarchy may be undressed, and therefore comes from a factorization of a canonical transformation. A particulary important function, related to the $\\tau$-function, appears as a potential of the hierarchy. We introduce a class of string equations which extends and contains previous classes of string equations considered by Krichever and by Takasaki and Takebe. The scheme is also applied for an convenient derivation of additional symmetries. Moreover, new functional symmetries of the Zakharov extension of the Benney gas equations are given and the action of additional symmetries over the potential in terms of linear PDEs is characterized.

Manuel Manas; Elena Medina; Luis Martinez Alonso

2005-09-06T23:59:59.000Z

471

High Redshift Gamma-Ray Bursts: Observational Signatures of Superconducting Cosmic Strings?  

E-Print Network (OSTI)

The high-redshift gamma-ray bursts (GRBs), GRBs 080913 and 090423, challenge the conventional GRB progenitor models by their short durations, typical for short GRBs, and their high energy releases, typical for long GRBs. Meanwhile, the GRB rate inferred from high-redshift GRBs also remarkably exceeds the prediction of the collapsar model, with an ordinary star formation history. We show that all these contradictions could be eliminated naturally, if we ascribe some high-redshift GRBs to electromagnetic bursts of superconducting cosmic strings. High-redshift GRBs could become a reasonable way to test the superconducting cosmic string model, because the event rate of cosmic string bursts increases rapidly with increasing redshifts, whereas the collapsar rate decreases.

K. S. Cheng; Yun-Wei Yu; T. Harko

2010-05-19T23:59:59.000Z

472

Lighting Options for Homes.  

SciTech Connect

This report covers many aspects of various lighting options for homes. Types of light sources described include natural light, artificial light, incandescent lamps, fluorescent lamps, and high intensity discharge lamps. A light source selection guide gives the physical characteristics of these, design considerations, and common applications. Color, strategies for efficient lighting, and types of lighting are discussed. There is one section giving tips for various situations in specific rooms. Rooms and types of fixtures are shown on a matrix with watts saved by using the recommended type lighting for that room and room location. A major emphasis of this report is saving energy by utilizing the most suitable, recommended lighting option. (BN)

Baker, W.S.

1991-04-01T23:59:59.000Z

473

Searches for Cosmic-String Gravitational-Wave Bursts in Mock LISA Data  

E-Print Network (OSTI)

A network of observable, macroscopic cosmic (super-)strings may have formed in the early universe. If so, the cusps that generically develop on cosmic-string loops emit bursts of gravitational radiation that could be detectable by both ground- and space-based gravitational-wave interferometers. Here we report on two versions of a LISA-oriented string-burst search pipeline that we have developed and tested within the context of the Mock LISA Data Challenges. The two versions rely on the publicly available MultiNest and PyMC software packages, respectively. To reduce the effective dimensionality of the search space, our implementations use the F-statistic to analytically maximize over the signal's amplitude and polarization, A and psi, and use the FFT to search quickly over burst arrival times t_C. The standard F-statistic is essentially a frequentist statistic that maximizes the likelihood; we also demonstrate an approximate, Bayesian version of the F-statistic that incorporates realistic priors on A and psi. We calculate how accurately LISA can expect to measure the physical parameters of string-burst sources. To understand LISA's angular resolution for string-burst sources, we draw maps of the waveform fitting factor [maximized over (A psi, t_C)] as a function of sky position; these maps dramatically illustrate why (for LISA) inferring the correct sky location of the emitting string loop will often be practically impossible. We also identify and elucidate several symmetries that are imbedded in this search problem, and we derive the distribution of cut-off frequencies f_max for observable bursts.

Michael I. Cohen; Curt Cutler; Michele Vallisneri

2010-02-22T23:59:59.000Z

474

Mobile lighting apparatus  

DOE Patents (OSTI)

A mobile lighting apparatus includes a portable frame such as a moveable trailer or skid having a light tower thereon. The light tower is moveable from a stowed position to a deployed position. A hydrogen-powered fuel cell is located on the portable frame to provide electrical power to an array of the energy efficient lights located on the light tower.

Roe, George Michael; Klebanoff, Leonard Elliott; Rea, Gerald W; Drake, Robert A; Johnson, Terry A; Wingert, Steven John; Damberger, Thomas A; Skradski, Thomas J; Radley, Christopher James; Oros, James M; Schuttinger, Paul G; Grupp, David J; Prey, Stephen Carl

2013-05-14T23:59:59.000Z

475

Cosmological and Wormhole Solutions in Low-Energy Effective String Theory  

E-Print Network (OSTI)

We derive and study a class of cosmological and wormhole solutions of low-energy effective string field theory. We consider a general four-dimensional string effective action where moduli of the compactified manifold and the electromagnetic field are present. The cosmological solutions of the two-dimensional effective theory obtained by dimensional reduction of the former are discussed. In particular we demonstrate that the two-dimensional theory possesses a scale-factor duality invariance. Euclidean four-dimensional instantons describing the nucleation of the baby universes are found and the probability amplitude for the nucleation process is given.

Mariano Cadoni; Marco Cavaglia

1994-06-09T23:59:59.000Z

476

Jet-fluid string formation and decay in high-energy heavy-ion collisions  

E-Print Network (OSTI)

We propose a new hadronization mechanism, jet-fluid string (JFS) formation and decay, to understand observables in intermediate to high-$p_{T}$ regions comprehensively. In the JFS model, hard partons produced in jet lose their energy in traversing the QGP fluid, which is described by fully three-dimensional hydrodynamic simulations. When a jet parton escapes from the QGP fluid, it picks up a partner parton from a fluid and forms a color singlet string, then it decays to hadrons. We find that high-$p_T$ $v_2$ values in JFS are about two times larger than in the independent fragmentation model.

M. Isse; T. Hirano; R. Mizukawa; A. Ohnishi; K. Yoshino; Y. Nara

2007-02-22T23:59:59.000Z

477

Open and Closed String Worldsheets from Free Large N Gauge Theories with Adjoint and Fundamental Matter  

E-Print Network (OSTI)

We extend Gopakumar's prescription for constructing closed string worldsheets from free field theory diagrams with adjoint matter to open and closed string worldsheets arising from free field theories with fundamental matter. We describe the extension of the gluing mechanism and the electrical circuit analogy to fundamental matter. We discuss the generalization of the existence and uniqueness theorem of Strebel differentials to open Riemann surfaces. Two examples are computed of correlators containing fundamental matter, and the resulting worldsheet OPE's are computed. Generic properties of Gopakumar's construction are discussed.

Itamar Yaakov

2006-07-30T23:59:59.000Z

478

Yang-Mills Gauge Conditions from Witten's Open String Field Theory  

E-Print Network (OSTI)

We construct the Zinn-Justin-Batalin-Vilkovisky action for tachyons and gauge bosons from Witten's 3-string vertex of the bosonic open string without gauge fixing. Through canonical transformations, we find the off-shell, local, gauge-covariant action up to 3-point terms, satisfying the usual field theory gauge transformations. Perturbatively, it can be extended to higher-point terms. It also gives a new gauge condition in field theory which corresponds to the Feynman-Siegel gauge on the world-sheet.

Haidong Feng; Warren Siegel

2006-11-28T23:59:59.000Z

479

Limits on a muon flux from Kaluza-Klein dark matter annihilations in the Sun from the IceCube 22-string detector  

E-Print Network (OSTI)

Sun from the IceCube 22-string detector R. Abbasi,etal 1III.the Sun from the IceCube 22-string detector R. Abbasi, 26 Y.performed with the 22-string con?guration of the IceCube

Abbasi, R.

2010-01-01T23:59:59.000Z

480

Geometry-dependent lighting  

E-Print Network (OSTI)

Abstract — In this paper we introduce geometrydependent lighting that allows lighting parameters to be defined independently and possibly discrepantly over an object or scene based on the local geometry. We present and discuss Light Collages, a lighting design system with geometry-dependent lights for effective feature-enhanced visualization. Our algorithm segments the objects into local surface patches and places lights that are locally consistent but globally discrepant to enhance the perception of shape. We use spherical harmonics for efficiently storing and computing light placement and assignment. We also outline a method to find the minimal number of light sources sufficient to illuminate an object well with our globally discrepant lighting approach. Index Terms — Lighting design, scientific illustration, discrepant lighting, light placement, silhouette enhancement, proximity shadows, spherical harmonics I.

Chang Ha Lee; Xuejun Hao; Amitabh Varshney

2005-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "holiday light strings" 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.


481

Lighting Group: What's New  

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

What's New What's New in the Lighting Group For more information on what's new in the Lighting Group, please contact: Francis Rubinstein Lighting Group Leader (510) 486-4096...

482

Light in the city  

E-Print Network (OSTI)

This thesis focuses on enhancing the awareness of light for the pedestrian,and using light as a way of revealing the structure of the city and its relation to the cosmos. It proposes that aesthetic qualities of light inform ...

Srinivasan, Kavita, 1976-

2002-01-01T23:59:59.000Z

483

Specific light in sculpture  

E-Print Network (OSTI)

Specific light is defined as light from artificial or altered natural sources. The use and manipulation of light in three dimensional sculptural work is discussed in an historic and contemporary context. The author's work ...

Powell, John William

1989-01-01T23:59:59.000Z

484

Energy_Savings_Light_Emitting_Diodes_Niche_Lighting_Apps.pdf...  

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

EnergySavingsLightEmittingDiodesNicheLightingApps.pdf EnergySavingsLightEmittingDiodesNicheLightingApps.pdf EnergySavingsLightEmittingDiodesNicheLightingApps.p...

485

Prospects for LED lighting.  

SciTech Connect

Solid-state lighting using light-emitting diodes (LEDs) has the potential to reduce energy consumption for lighting by 50% while revolutionizing the way we illuminate our homes, work places, and public spaces. Nevertheless, substantial technical challenges remain in order for solid-state lighting to significantly displace the well-developed conventional lighting technologies. We review the potential of LED solid-state lighting to meet the long-term cost goals.

Tsao, Jeffrey Yeenien; Gee, James Martin; Simmons, Jerry Alvon

2003-08-01T23:59:59.000Z

486

Lighting Control Systems  

Science Conference Proceedings (OSTI)

The demand for lighting control systems in residential, commercial, and industrial facilities is on the rise with the demand for increased energy savings. With lighting accounting for almost 23% of grid load, there is significant opportunity to reduce lighting load while improving the quality of light for customers. Lighting control systems are becoming more intelligent as the need for them to interface with building control systems and demand response systems also increases. Lighting control systems use...

2009-12-17T23:59:59.000Z

487

Composite Lighting Simulations with Lighting Networks  

E-Print Network (OSTI)

A whole variety of different techniques for simulating global illumination in virtual environments have been developed over recent years. Each technique, including Radiosity, Monte-Carlo ray- or photon tracing, and directional-dependent Radiance computations, is best suited for simulating only some special case environments. None of these techniques is currently able to efficiently simulate all important lighting effects in non-trivial scenes. In this paper, we describe a new approach for efficiently combining different global illumination algorithms to yield a composite lighting simulation: Lighting Networks. Lighting Networks can exploit the advantages of each algorithm and can combine them in such a way as to simulate lighting effects that could only be computed at great costs by any single algorithm. Furthermore, this approach allows a user to configure the Lighting Network to compute only specific lighting effects that are important for a given task, while avoiding a costly simulation of the full global illumination in a scene. We show how the light paths computed by a Lighting Network can be described using regular expressions. This mapping allows us to analyze the composite lighting simulation and ensure completeness and redundant-free computations. Several examples demonstrate the advantages and unique lighting effects that can be obtained using this technique. 1

Philipp Slusallek; Marc Stamminger; Wolfgang Heidrich; Jan-Christian Popp; Hans-peter Seidel

1998-01-01T23:59:59.000Z

488

Lighting Group: Links  

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

Links Links Links Organizations Illuminating Engineering Society of North America (IESNA) International Commission on Illumination (CIE) International Association of Lighting Designers (IALD) International Association of Energy-Efficient Lighting Lightfair International Energy Agency - Task 21: Daylight in Buildings: Design Tools and Performance Analysis International Energy Agency - Task 31: Daylighting Buildings in 21st Century National Association on Qualifications for the Lighting Professions (NCQLP) National Association of Independent Lighting Distributors (NAILD) International Association of Lighting Management Companies (NALMCO) Research Centers California Lighting Technology Center Lighting Research Center Lighting Research at Canada Institute for Research in Construction

489

Advanced Demand Responsive Lighting  

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

Demand Demand Responsive Lighting Host: Francis Rubinstein Demand Response Research Center Technical Advisory Group Meeting August 31, 2007 10:30 AM - Noon Meeting Agenda * Introductions (10 minutes) * Main Presentation (~ 1 hour) * Questions, comments from panel (15 minutes) Project History * Lighting Scoping Study (completed January 2007) - Identified potential for energy and demand savings using demand responsive lighting systems - Importance of dimming - New wireless controls technologies * Advanced Demand Responsive Lighting (commenced March 2007) Objectives * Provide up-to-date information on the reliability, predictability of dimmable lighting as a demand resource under realistic operating load conditions * Identify potential negative impacts of DR lighting on lighting quality Potential of Demand Responsive Lighting Control

490

Light Laboratory, Inc.  

Science Conference Proceedings (OSTI)

... 12) Solid State Lighting Luminaires - Color Characteristic Measurements. [22/S04] IES LM-16:1993 Practical Guide to Colorimetry of Light Sources. ...

2013-07-26T23:59:59.000Z

491

Hubbell Lighting Photometric Laboratory  

Science Conference Proceedings (OSTI)

... 12) Solid State Lighting Luminaires - Color Characteristic Measurements. [22/S04] IES LM-16:1993 Practical Guide to Colorimetry of Light Sources. ...

2013-07-26T23:59:59.000Z